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w. 15, 1946..
c. w. MOTT
Original Filed Nov. 21', 1942
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Original Filed Nov. 21, .1942
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Original Filed Nov. 21, 1942
7 Sheets-Sheet 3
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7 Sheets-Sheet‘ 4
Oct. 15, 1946.
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,Original Filed Nov. 21, 1942
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Original Filed Nov. 21, 1942
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Patented Oct. 15, 1946
‘ Carl W. Mott, La Grange, Ill., assignor to Inter- .
national Harvester Company, a corporation of
New Jersey
Original application November‘Zl, 1942, Serial
No. 466,463. Divided and this application
March 22, 1944, Serial No. 527,625
5 Claims. (01. 97-50)
This invention relates to vehicle-mounted im
plements and, more particularly, to power-lifting
and power-adjusting mechanism supplied with
operating energy from a power plant associated
with the vehicle. The present application is a
division of my copending application, Serial No.
466,463, ?led November 21, 1942, for “Power ad
justing mechanism.”
vThe general purpose of this invention is the
the length of time the valve control member is
displaced from the neutral position. Conse
quently, an operator of a vehicle having appa
ratus of this kind installed thereon must divert
his attention from the course of the vehicle or
other duties to observe the tools for ascertaining
their effect while manipulating thevalve control
lever for causing a change in their depth. The
operator cannot judge the time the valve is left
provision of a mechanical organization for the 10 open with sufficient accuracy for assuring that
the tools will be set or reset to a desired depth. _,
practise of a new tillage technique. Vehicular
tillage apparatus constructed according to the
principles of this invention functions in a man
ner enabling an operator to manually control
power derived from the vehicle power plant for
In the present apparatus where there is co-‘__
ordination both in direction and amount of
movement'of the tools with respect tomanual
control member manipulation, this member can
be reset at any time for positive precise resetting
of the tools. This type of‘operation has been
age tool both upwardly and downwardly coor
found particularly useful where the apparatus is
dinately with selective movement of a manual
operated in ?elds having areas of relatively hard
control member in respectively opposite direc
tions. Such coordination between the direction 20 and soft soil. When, for example, the oper
and amount of movement of the manually'con
ator arrivesat the area of hardsoil which he
desires to till at a greater depth, he can, from
trolled'member and the direction and amount
of depth adjustment of a tillage tool in a positive
the experience of one or more previous excur
manner enables the operator to easily and uni
sions across that hard area, know the exact set
formly control the tool depth in all kinds of
ting’ he willwant for the manual control member
for obtaining the desired greater‘tool depth. He
soil. The apparatus is convenient for the oper
can therefore simply move the manual control
ator, since irrespective of the character of the
lever to the desired positionwithout observing
soil encountered, he can select the depth at which
the tools. He may, of course, when subsequent
the tillage tool will be operated by the virtual
ly convenient, observe the tools to see thatthe
effortless ‘movement of a ?nger-pressed lever into
desired vtillage eiiect is beingobtained, Since
a position corresponding to the desired depth.
positively controlling the working depth of a till
f Due cognizance istaken ‘of certain priorart
the apparatus functions to vforce the tools into
structures which employ manually controlled ap
paratus, which, by means of power derived from
the vehicle engine, respond for mechanically con
trolling the depth. One example of this type of
prior art is disclosed in the British Patent No.
19,419 (A. D. 1890). In the disclosure of this pat
ent, water under‘ pressure is selectively intro
the ground as well asto raise the-tools by means
duced into opposite ends of the cylinder of a
reciprocable hydraulic motor piston for causing
this motor to either lift or lower a ‘tillage tool.
However, the water is controlled in its flow to
and from the motor cylinder by an ordinary slide
valve which necessitates the manipulation of a
valve control member from a neutral position
for causing the water to drive the motor and
the subsequent manual restorative manipulation
of the control member to the neutral position for
stopping the motor. The control lever and the
motor work member or piston arenot correlated
both in direction and amount of movement,
wherefore atime, element is involved, namely,
that the tillage tool will be, raised or lowered,
as the case may be, a distance depending upon
of > power derived from the vehicle engine, the
just described technique can be practisedgin all
types of soil.
Cognizance has also been taken of the prior
art Patents Nos. 2,118,180 and 2,118,181 to-I-Iarry
G. Ferguson, which disclose related apparatus in
which a manual control member functions to
cause movement of the tillage tools only in an
upward direction, but, since the responsive move
ment of the tools also depends upon the magni
tude .of the. drawrbar pull, the depth adjustment
of the tools while in the soil is not necessarily
uniformly correlated with the movement of the
control member. Also the Ferguson apparatus
depends upon the weight and “suction” vofthe
tools for causing them todig more deeply into the
ground and for this further reason cannot be
utilized for accomplishing the aforesaid purpose
of the present apparatus.
This applicant is also aware of manually con‘-,
trolled power apparatus employed in other arts
to obtain powered movement of a driven mem
ber in either of opposite directions in an amount
correlated in both direction and amount with
the movement of an oppositely movable control
member. Notable of such arts is hydraulic
steering, and for an example, reference may be
made to United States Patent No. 529,495 to
Byron Jackson.
A further object of this invention is the pro
vision, in a hydraulic system for controlling the
elevation of a tillage tool, of valve means hav 10
ing variable delivery successively operable ?ow
tending from an operator’s station 24 on the rear
ward portion of the tractor is a steering mecha
nism 25 for controlling the path of movement of
the tractor. To the forward portion of the trac
tor is connected for vertical movement a working
tool structure 26 having working tools 21 there
The connection of the working tool struc
ture with the tractor is made by means of upper
and lower parallel links 28 and 29 connected to
a bracket structure 30 secured to the forward por
tion of the tractor by means of clamping bolts
38. On the bracket structure 30 is a lifting lever
rate stages for controlling the energization and
speed of the ?uid-driven motor which changes
32 pivoted for fore and aft movement and con
the elevation of the tool, and wherein the flow
nected to the working tool structure 26 by means
rate in each stage ‘is variable, making it possible 15 of a lift rod 33.
to employ the stage of less ?ow capacity for ob
On the rear portion of the tractor is connected
taining small adjustments of the tool while
a bracket structure 34 to which is connected, by
it is in the soil-tilling position.
means of parallel links 35, a rear working struc
These and other desirable objects inherent
ture 36 having a working tool 3'! thereon. Simi
in and encompassed by the invention will be
larly, there is on the bracket structure 34 on the
more clearly understood upon reading the en
suing description with reference to the annexed
drawings, wherein:
Figure 1 is a view in elevation of a tractor or
tool-supporting structure with a working tool
connected thereto and with the ?uid-operated
arrangement of the present invention arranged
for moving the working tool;
rear of the tractor a fore and aft pivoted lever
38 connected to the lower parallel link 35 by
means of an adjustable lift rod 39 having a handle
portion 40 accessible to the operator’s station 24.
By means of this handle portion 40, an adjustment
may be made of the rear working tool structure
independently of the forward working tool struc
Figure 2 is a view in elevation of the interme~
The tractor 2i has the usual power plant 4| and
diate housing of the tractor with a portion there 30 a, longitudinally extending body portion 42. This _
of cut away to show a fluid operated device and
‘body structure 42 includes an intermediate hous
other parts of the ?uid operated arrangement
ing 43 in which are mounted parts of the ?uid
which are used therein;
power arrangement to be described more in detail
Figure 3 is an enlarged plan view of the ?uid
hereinafter. Extending from the housing 43 and
operated device together with its valve mecha
pivoted thereon for fore and aft pivotal movement
is a lifting arm 44 connected respectively with
Figure 4 is an enlarged view in elevation of the
the Divotable levers 32 and 38 by means of hori
?uid operated device taken of the same side ex-'
zontal lift rods 45 and 45, Adapted to be oper
posed in Figure 2 but with a portion of its cylin
ated by the tractor motor is a ?uid pump 4'! hav~
der structure broken away to show the piston 40 ing communications with the intermediate hous
within the same;
ing'43 by means of e, communicating pipe 48.
Figure 5 is a side elevational view'of the ?uid
Within a fuel supply tank 49 there is a ?uid res
operated device looking in the direction opposite
ervoir housing 50 arranged for communication
to that shown in Figure 2 and with a portion of
with parts within the intermediate housing 43
the valve mechanism broken away for clarity, the “ by vertically extending pipes 5i and 52. On a
view being taken generally along the line 5-5 of
steering rod supporting post 53 is mounted a con
Figure 3;
trol lever 54 manually adjustable along a quad
Figure 6 is an unfolded view of the valve mech
rant 55 for operating a lever 56 pivoted on the
anism illustrating the ?ow of ?uid therethrough
intermediate housing 43 and connected inside the
pursuant to causing piston movement in one di
housing with the parts of the ?uid power arrange
ment in a manner brought out hereinafter. The
Figure 7 is a view similar to that of Figure 6
with the valve mechanism conditioned for direct
connection of the lever 54 with the lever 56 is
made by a rod 57 connected to the lower end of
the lever 54. The lever 54 is pivoted at 58 on the
ing the flow of ?uid (indicated by the arrows)
so as to cause the piston to move in the opposite
Figure 8 is an unfolded view of the distributing
head in the tractor intermediate housing, with
lines illustrating the ?ow of ?uid through the
Figure 9 is a sectional view taken along the line
9-9 of Figure 8;
Figure 10 is a sectional view taken along the
line Hi—-l0 of Figure 8;
I Figure 11 is a fragmentary view in section of
the distributing head of Figure 8, showing the by
pass valve thereof.
With continued reference to the drawings, there
is shown in Figure 1 a tractor or tool supporting
structure 2| of a character suitable for embodi
ment in the invention. This tractor includes a
dirigible supporting truck at its forward end with
wheels 22 and also includes traction wheels 23
which provide support at the rear.
Connected with the dirigible wheels .22. and ‘3X.
quadrant 55.
Referring now particularly to Figure 2, there
is shown an enlarged View of the intermediate
housing 43 with a portion of the same broken
away to show parts of the ?uid power arrange
ment therein. This housing 43 is of sturdy con
struction since it is a part of the body portion
which must withstand the usual strains common
to tractors of this type. The lever 44 is pivoted
to the upper portion of the housing 43 as indi
cated at 59 and has a lower end 60 to which is
coupled a piston rod 61 of a fluid power or ?uid
operated arrangement or device 62 mounted with
in the housing and pivoted to the same as indi
cated at 63 in an inclined position. The lever 55
is likewise pivoted to the upper portion of the
housing 42 as indicated at 64 and has a depend
ing portion 65 which is connected to a longitudi
nally movable follower element 65 located on the
?uid operated device 62, the function of which
75 will be described hereinafter in connection with
the description of the ?uid operated device it
For the sake of compactness, the ?uid com
munication pipes 48 are connected to the housing
43 as indicated at 61 and are in communication
with corresponding pipe openings 68 and 69
formed through the housing 43. For further
communication of the ?uid from the passages 68
being retained ‘by the ring 83, while the latter is
retained by a washer 89 and a ring 90 secured to
the main piston element 85. As viewed in Figure
4, the clamping bolt 11 is threaded into a thread
ed recess 9! directly upwardly into the cylinder
structure from the lower edge of the same. Ad—
jacent the threaded recess 9|, Figure 6, is a ?uid
communicating opening 92 into which ?uid passes
from the hose l4, and thence through a passage 93
nected to the top part of the body housing 43. 10 to an angle-shaped passage 94 in a valve housing
'95 which is adapted to be secured to the cylinder v
Fluid from the reservoir 56 is delivered through
structure 18 with a partition plate 96 secured
the pipe 52 and a coupling ‘II to a passage within
therebetween. This partition plate 96 has several
the block it] for delivery to the passage 68 and
?uid passing holes arranged for communication
thence to the pump 41, Fluid is returned from
the pump to the passage 69 under pressure and 15 between respective other passages, as the passage
thence through the block 10 and a supply hose ' 94, formed in respective ?at faces of the valve
housing structure 95 and of the cylinder structure
12 which communicates with a distributing valve
18. By using the partition plate 96 the difficult
13. From this distributing valve 13 ?uid is deliv
task of coring holes within castings is eliminated.
ered under pressure through a hose 14 to the ?uid
operated device 62. From the ?uid operated de 20 The passages may be simply impressed or cast
into ?at or complementally ?tting faces of the
vice 62 the ?uid ?ows through a hose 15 and
and 69, there is a communication block 10 con
structures adapted to be seal-pressed together,
the distributing valve ‘i3 and thence through the
and the fluid passages themselves are completed
vertical pipe 5! for return to the ?uid reservoir
on opposite sides of the partition plate 96 by vir
50 in the fuel tank 49.
As the ?uid is distributed under pressure to the 25 tue of the same being secured therebetween.
Hence, in the manufacture of the power device
?uid operated device 62, the arms 44 on the inter
the necessity for coring of openings in order to
mediate housing 43 will be adjusted thereby fore
provide passages for the ?uid has been eliminated.
and aft, and since the working tool structures on
All of this has lessened the cost of a more or less
the forward and rearward portions of the tractor
are connected to these arms, these working tool 30 complicated structure and has brought the same
within the price range of ?uid-operated devices
structures will be adjusted by the power of this“
?uid actuated device 62.
The amount of move
of the more simple type.
Referring now particularly to Figure 6, the
?uid on entering the passages 92 and 93 is first
working tools are moved from one extreme posi 35 communicated to a longitudinally extending
cavity or impression 97 in the exposed ?at face
tion to another extreme position with respect to
of the cylinder structure 16. From this impres
the tractor. This movement of the working tool
sion 97 it may be delivered either through a hole
structure is initiated by the manual lever 54 0p
98 or a hole 99 in the plate 96. Assuming the
erated from the operator’s station .24 although
it should be understood that the actual move 40 ?uid passes in the direction of the arrows through
the hole 98, it comes into communication with
ment of the working tools is done by the power
the angled impression 94 in the valve housing 95.
device itself. In a manner to be hereinafterv de
ment of the working tools is limited only by the
maximum stroke of the piston rod 6| whereby the
This valve housing 95 has four valves I00, l9l,
‘H32, and I93 within chambers I94, I05, I96, and
the quadrant 55, and this movement will be re
?ected in the valve control mechanism associated 45 H31, respectively, of the valve structure 95. Fluid
upon leaving the impression 9'! passes through the
with the ?uid power device 62 so that a corre
opening 98 in the plate 96 to the valve chamber
sponding movement of said power device and
m5 andpast the valve “H, which is open, to the
working tools will be had.
impression 94 on the face of the valve structure
Referring now particularly to Figures 3, 4, and
5, a description will now be made of the ?uid ac 50 95. From this impression 94 it is delivered
through an opening H19 in the plate 96 to a pas—
tuated device 62 and of the valve mechanism \
sage I H] in the left-hand or front end of the
therefor, and by assuming that ?uid is already
cylinder structure from which it is discharged
provided under pressure in the communicating
into the cylinder structure to act upon the pis
hose coupling 14 for delivery to the ?uid operated
device 62. The communicating hose coupling 14 65 ton 19.
For work to be performed upon the piston 19
connects with the ?uid operated device by means
there must be a release of ?uid on the end of the
of a coupling 16 secured to the device by means
piston opposite to that against which ?uid is im
of a clamping bolt ‘ll. The ?uid operated device 4
pressed for producing a work stroke. This is ac
includes generally a cylinder housing 18 and a
piston structure 19 secured to the inner end of 60 complished by ?uid passing from the opposite end
of the cylinder structure, corresponding to said
the piston rod 6|. The piston rod is slidable
opposite end of the piston, through a passage
through a cylinder head 80 which closes one end
lll thereof, thence through an opening H2 in
of the cylinder structure ‘I8. The opposite end of
the plate 96 and for delivery to an angled im
the cylinder structure [8 has a head member 8|
with a lug 82 serving to connect the device with 65 pression H3 on the face of the valve structure
95. From this impression N3, the ?uid passes
the intermediate housing 43, as previously men
the valve I92 for delivery to an intermediate ‘T
tioned, at 63.
shaped impression H4 in the valve structure 95.
The piston structure 19 may be of any known
From this T-shaped impression H4 ?uid passes
type adapted for double acting cylinder devices,
but in the present instance includes a ring 83 70 through an opening‘ H5 in the plate>96 to an
impression H6 on the face of the cylinder struc
which fits over a narrowed portion 84 of the pis
ture, downwardly through a vertical passage H‘!
ton rod and is made fast thereto by a main piston
to an outlet port H8. This outlet port H8 is in
element 35 threaded as indicated at 86 to the por
communication with a hose coupling J19 secured
tion 84. Associated with this main piston ele
to the cylinder structure by means of a clamping
ment 85 are wiping rings 81 and 88, the former
scribed, the lever 54 can be set at any position on
.‘bolt ‘I20 seated in‘an opening I2I , Figures 4 and 5.
From the opening H8 ?uid then passes through
the coupling H9 to the hose connection ‘I5 to
be delivered to the distributing valve 13 for re
turn .to the fluid reservoir 50. As viewed in Fig
ure 6, it will be noted that upon the introduction
main valve I00 may be opened with the least
expenditure of energy, thereby making possible
the use of operating devices of minimum dimen
sion for operating the valve. A hole I34 in the
valve provides communication between the cham
ber I2‘! and a chamber I33 bounded in part by
of ?uid to the cylinder through the opening I I0
and the exhaust of ?uid from the cylinder
the valve seat I29.
vthrough the opening II I, the piston ‘I9 will be
valve I00 through which ?uid is transmittable
The chamber I33 has a
narrow opening I35 in the upper part of the
moved to the right or rearwardly, or, as viewed 10 to the upper part of the ?uid-containing valve
' ‘in Figures 4 and 1, will be moved to the left or
rearwardly to rock the arm “for raising the
working tools.
Should the piston 79 be projected forwardly
'orto the left, as viewed in Figure 6, when a lower
ing of the working tools is desired, the ?uid will
take a path through the valve structure as now
to be described with reference to Figure 7. To
.e?ect movement of the piston to the left, referring
.to Figure 7, the ?uid which always enters the
bore I04.
Through this opening I35 there ex
tends a vertical operating rod I36 which contacts
the ball I29 and which, when pressed down
wardly, serves to unseat the ball I28 from its
contact I29 on the valve I00. As the ball I28 is
unseated, ?uid under pressure will at ?rst pass
upwardly through the narrow opening I35 until
su?icient back pressure is built up above the
main valve I00 to materially contribute to the
lowering of the same for breaking the contact of
the tapered portion I25 with the valve seat I25.
The downwardly displaced ball forces the plunger
vertically extending opening 92 will be delivered
through the long impression 91 to the opening
99 in the plate 95, instead of to the opening 98
of the plate 95, and then through the valve
chamber I01, and past the valve I03 to the angled
impression .I I3 for delivery through the opening
I30 downwardly, ?rst an initial amount to bring
H2 in the plate 96 to the passage III in the cyl
inder structure ‘I8. From this passage III it is
discharged into the cylinder structure to act upon
the piston for effecting movement of the same
to the left. Simultaneously with movement of
the piston in this direction ?uid leaves the cyl
inder structure from the opposite end of the pis
ton and does so through the opening IIO, open
slide it downwardly, comparatively little addi
tional force applied downwardly through the rod
the upper side of an oversize opening I 3‘!a ex
tending diametrically through the plunger into
‘contact with a pin I3‘!b traversing said opening
and having its ends fastened in the valve mem
ber, I00. Then, after the building up of said back
pressure above the valve member tending to
I36, ball I23, plunger I30, and the cross-pin I31b
is necessary to cause the valve member I00 to
move downwardly to unseat it at I25 and thus
ing I09 in the plate 96, impression 94, piston 35 provide direct communication between the an
valve I00, valve chamber I04, an opening I22 in
nular chamber and the upper part of the valve
the plate 96, and thence into an axially extending
casing bore I04.
impression I23 in the ‘cylinder structure 18 from
As a means for operating the rods I36 there
which it passes through an opening I24 in the
are provided plungers I39 reciprocally carried in
plate 95 to the T-shaped impression H4 in the
a sealing block I40 through which the rod I36
valve structure 95. From the T-shaped impres
extends. This sealing block I40 is located in the
sion I I4 the ?uid discharge continues through the
upper end of the valve casing bore I 04 and bears
opening II5 to the impression H6 in the valve
against a sealing element I4I. Pairs of the seal
structure and thence downwardly through ver
ing blocks I40 are retained in place by respective
tical openings I I‘! and I I8 to the return hose con
plates I42 secured to the upper part of the valve
nection ‘I5. It should now be apparent that valve
housing by means of screws I43. The plungers
‘mechanism has been provided for controlling the
I39 are normally retained vertically upwardly by
?ow of ?uid for moving the piston 19 in either of
the action of the spring I3I. The valves are
its reciprocal directions within the cylinder ‘I8.
arranged in pairs and from them there extend
Referring now to Figure 5, a description of the 50 two of the control plungers I39 spaced axially
valve arrangements I09 to I03 will be made with
of the cylinder structure ‘I8 and accessible at the
particular reference to the arrangement I00, since
top of the valve structure 95. Each pair of
these four valve arrangements are identical. The
plungers is controlled by a lever I44 pivoted on a
valve I06 is cylindrical and is tapered on one end,
pin I 45 supported by a lug I46 mounted on the
as indicated at I25, for contact with a conical seat 55 plate I42. Each lever is alined longitudinally
:I2'6 formed in the valve housing 95. For a por
with the tops of its respective plungers I99 and
tion of its length, adjacently to its tapered por
as the same is rocked about its pivot pin I45
tion I25, the valve is of smaller diameter than
either one or the other of the two plungers I39
the valve casing bore I 04 in which it is reciprocal,
will be depressed against the action of the asso
to provide a, passage for ?uid around this portion 60 ciated compression spring I3I.
of the valve upon the same being opened by the
Mounted on the upper side of the cylinder
breaking of its contact with the seat portion I26.
structure 18 for pivotal movement about an axis
When the valve is closed, this smaller diameter
parallel with that of said structure is a main
portion of the valve, together with the valve cas
operating lever I41, Figures 1, 2, and 3, having a
ing bore I94, provides an annular ?uid chamber
laterally extending arm I48. The pivotal connec
I2‘! about the valve I00, and this chamber is in
tion is made to lugs I40 and I50 located respec
communication with certain of the holes as 98
tively on the head members 80 and SI of the
and I00 formed in the plate 90.
cylinder structure, and by means of pins I5I and
Within the valve I00 there is a secondary
I52. This pivoted operating member I 41 there—
ball valve I28 normally retained against its seat 70 fore spans a substantial distance lengthwise of
I 29 by a spring-pressed plunger I30 to the lower
the cylinder structure.
end of which is connected a compression spring ’
The arm I48 ‘has in its outer end a horizon
I3I which reacts against a plug I32. This sec
tally extending slot I53 adapted to receive a
ondary valve is so designed in the valve I00 in
connecting element I54 having ball-shaped ends
order to provide an arrangement whereby the 75 I55 for making universal joint connections re
spectively with the inner ends of the levers I44,
of the piston will begin and will not stop until
the ball ends I55 being inserted within recesses
I56 of the levers. As the lever I41 is rocked, the
the cam I6I has been moved so that the pin
I69 is again in the center of the neutral or in
outer end of its arm I48 will move either upwardly
clined portion I65 of the slot. If the cam fol
or downwardly for pivoting the levers I44. If
lower 66 is moved to the left as viewed in Fig
the arm I49 moves downwardly, the plungers I39
ure 4, the piston will move to the left until the
on the inner sides of the pins I45 will be de
portion I65 of the slot has returned the cam fol
pressed, whereas if the arm’ I48 is moved up
lower and the pivoted structure I41 to the neutral
wardly the plungers I39 at the outer sides of the
position. Similarly, if the cam follower 66 is
pins I45 will be depressed. In either movement 10 moved to the right, the piston 19 would move to
of the arm I48 one plunger I39 of each pair will
the right, assuming that it had not already been
completely returned to the right side of the cyl
be moved.
One form of means will now be described which
inder structure as viewed in Figure 4.
employs cooperable and independently movable
As the inner plungers I39 are depressed, the
counterparts, respectively manually controlled 15 valves NH and I02 are opened as viewed in Fig
and constrained for movement with the motor
ure 6, and ?uid automatically ?ows as traced in
piston, for manipulating the valves in the motor
Figure 6 to the port I I6 to act against the piston
casing in such a manner that the said piston or
19 to the right, or to the left as viewed in Fig
work member will be driven coordinately in di
ure 4. When the outer valves I 69 and I63 are
rection and distance with the direction and dis 20 depressed, the flow of fluid is as illustrated in
tance of adjustment of a manual control mem
Figure '7, that is, to the piston rod end of the
ber (54, Fig. 1) connected with the manually
cylinder structure to move the piston 19 to the
controlled counterpart. Another form is dis
left, or to the right as viewed in Figure 4.
closed in my copending application Serial No.
The valve balls I28, in addition to serving as
516,470, ?led December 31, 1943, for Fluid con 25 an initial opening means for the valve means as
trol apparatus.
On the pivoting operating structure I41 is a
longitudinally extending rod I51, Figures 1, 2,
3, and 4, on which is slidable the adjustable stop
I06, also cooperate with the valve members I25
in providing ?ow rate stages in which such valve
means may be operated and corresponding speed
stages in which the force transmitter 19, Figure
or cam follower member 66 connected to the 30 4, and the part 31, Figure 1, areadjustable. When
the valve means is operated in an initial stage
lower end of the lever 56 by means of a connect
in which the Valve stem I36 thereof is depressed
ing link I59. ‘This link I59 can thus be operated
far enough for unseating only the associated ball
by the lever 56 to adjust the follower 66 along
I26, only a small maximum amount of fluid can
the rod I51, the lever 56 being connected to the
manual adjustable lever 54. It will thus be ap 35 flow past the valve means for introduction into
and exhaust from respective ends of the cyl
parent that movement of this follower 66 will
inder to incur relatively slow movement of the
be corresponding in amount to the amount of
movement of the lever 54 over the quadrant 55.
piston or force transmitter 19 and the tool or
adjustable part 31. In certain installations such
ture 18 is a guide pin I60 on which is supported 40 slight or micrometer adjustment of the tool is
highly desirable, and in such installations it is,
the free end of an elongated cam I6I having a
also sometimes desirable to cause the tool to move
cam slot I62 through which the pin I69 extends.
at a relatively high rate of speed. With the
The projection I69 has a flared outer portion
present apparatus, the higher rate of movement
I63 to positively hold the .cam I6I against lat
eral de?ection. The back end of the cam I‘6I 45 is obtainable at will simply by moving the manual
is connected to the piston rod 6I as indicated
control lever to advance the cam fol1ower'66, Fig
at I64 whereby it will be movable with the. piston
ure 4, in the direction the cam member I6I is
being moved by the force transmitter 19 but at
rod and piston 19. The cam slot I62 has an in
a greater speed, whereby the diagonal portion of
termediate neutral portion I65 disposed angu
larly with respect to o?set parallel portions I66 50 the cam slot I62 will be effective for depressing
the valve stems I36 of the already opened valves
and I61. It will be observed that the cam fol
more distantly for likewise depressing the balls
lower element 66 is folded about the rod I51 to
be adjustably slidable thereon and has two op
I28, the plungers I39, the pins I31‘), which will be
thus ultimately engaged by the upper sides of
posed depending portions I68 which straddle the
cam I6I to support a pin I69 in the cam slot I62. 55 the oversize openings I316, and hence the valve
members I25 for unseating said members I25
This pin I69 is arranged to ride in the cam slot
from their seats I26 to place the valves in their
I62 so that as the manually controlled lever 54
second operating stage having the much in
is pivoted to adjust the cam follower 66 length
wise of the rod I51, the pivoted structure or le
creased flow rate. The ?ow rate in either range
ver I41 will be pivoted on the pivot pins I5I and 60 is variable according to the speed at which the
I52 to cause up or down movement of the arm
manual control member is moved. For instance,
while the apparatus is operating with only the
I48, this being effected by the reaction of the
pin I69 against the edges of the cam slot I62.
balls I28 unseated, the distance they are un
seated may be varied by slightly accelerating or
The normal position of the follower 66 is that
shown in Figure 4 but as it is adjusted rearward 65 decelerating the speed of the manually controlled
?nger grip lever 54.
ly or to the left the pin I69 will ride upwardly
on the inclined neutral portion I65 to effect
hence the piston speed may be kept constant by
downward movement of the arm I48 so that the
moving the manual control lever 54 at such uni
two inner plungers I39, Figure 5, will be oper
form speed that keeps the pin I69, Figure 4, in
ated. Should the operator move the follower
?xed relation with the diagonal cam slot portion
so that the pin I69 moves downwardly along the
I65 in which it is rideable, that is, to move the
_ neutral portion I65, the upper edge of, the cam
pin I69 in the same direction and at the same
slot will pivot the structure I41 so that the arm
speed at which the motor piston 19‘moves the
I48 moves upwardly thereby operating the outer
cam member I6I. If the manual control lever
plungers I39. As this takes place the operation 75 is decelerated from this uniform speed, the cam
Projecting laterally from the cylinder struc
member I6! will gain upon the pin I59 to allow
the balls I28 to approach their seats, throttling
the fuel ?ow and decreasing the piston speed. If
the manual control lever is stopped, the neutral
point of the diagonal slot in the cam member it!
will immediately overtake the pin I58 to seat the
balls I 28 and thus stop piston movement. Should
the manual control lever be accelerated from said
0nd ?uid-operated device, not shown, for oper';
ating tools on the other side of the tractor. Fluid
is supplied to this distributing valve and to this
high pressure opening through a vertically ex
tending opening or duct I12. Fluid is delivered
from the pump source to the duct I12 through
an attached coupling I13 which connects the
supply hose 12 to the distributing valve 13. The
uniform speed, the pin I69 would be advanced
views in Figure 8 show the distributing valve
with respect to the advancing diagonal cam slot 10 opened to illustrate the ducts and openings in
portion I65 to further unseat the balls I28 from
its two parts I14 and I 15, these views being ele
their seats I29 to increase ?uid ?ow and piston
vational views of the individual parts I14 and I15
speed. Thus, within a speed range variable from
of which the latter is shown upside down in a
zero to a maximum determined by the ?ow ca
position adapting the parts to be folded upto
pacity of the valve parts I28—I29, the manual
gether to form the composite distributing valve
control lever 54 is manipulatable at slow speeds
to select slow speeds of piston adjustment. This
Fluid from the low pressure side of the ?uid
slow speed of the piston is so coordinated with
operated device or from the return hose coupling
the speed of the lever 54 as to create the sensa
15 is returned to the distributing device through
tion that the parts moved by the piston are moved 20 openings I16 and I11. The opening I11 is uti
e?ortlessly by said lever. If the lever is accel
lized for adjusting working tools at the side of the
erated, decelerated, or stopped, a like instan
tractor opposite to that shown in Figure 1. From
taneous response is incurred by the piston and
this opening I11 the returning ?uid will continue
the parts it drives. Because of the small ?ow ca
through a passage I18 in the distributing valve
pacity of the valve parts I28——l29, the just ex 25 part I15 and thence upwardly through the pipe
plained force transmitter or piston movement
5| to the reservoir 50.
control is tantamount to a Vernier adjustment.
Normally, ?uid under pressure is delivered to
The speed at which the manual control lever
the openings I10 and HI through a round open
54 is adjusted in either direction also controls
ing I19 and a duct I80 (in the form of a groove
the speed and direction of the motor piston dur
in the ?at face of the part E14) which extends
ing operation of the apparatus in the high speed
between the two openings I10 and Ill. The path
range, that is, while valve members I25, Figure 4,
of ?uid through the distributing valve is that
are un‘seated from their seats I26. The upper
taken by the arrows I8I. When ?uid is not be
limit of said range is determined by the flow ca
ing delivered to the ?uid-operated device 62, the
pacity of the valve parts I 25—I26 and the deliv 35 pressure in the duct I12 reaches su?icient mag~
ery capacity of the ?uid source, and the speed
nitude that the ?uid flows vertically through said
within said range is selected by adjusting the dis
tance the part I25 is unseated in the manner de
scribed above with respect to the balls I28. The
control lever of course must be moved more rapid
duct I12 to an opening I82 in the part I15 to
react against and open a by-pass ball valve I83
which is normally retained against its seat I84
by a compression spring I85 and a Washer I86.
ly while controlling the higher piston speeds. So
Such ?uid that by-passes this ball valve 82 will
long as this higher speed range limit is not ex
be delivered through a duct I81 to the duct I 18
and from there returned to the ?uid reservoir. It
ceeded the piston movement will be instantane
ously responsive to speed and direction of the
should be particularly apparent at this time that
?uid is kept under pressure within the high pres
It is also important to note that the speed con
sure passages I12 and I80 at all times and that
trol is ideally responsive to the muscular re?exes
from these passages ?uid pressure is extended to
of an operator since it is natural for him to move
the ?uid operated device whereby fluid is pro
the control lever faster or slower as faster or
vided under pressure at a location within the cyl
slower movement of the motor piston is desired. 50 inder structure itself and within a short dis
This operating characteristic of the apparatus is
tance from the openings H0 and II I at the ends
further highly desirable when ‘making micromet
of the cylinder. In other words, ?uid under pres
ric adjustments when the naturalv inclination of
sure is always on tap for the ?uid operated
an operator is to move the control lever with a
devices. This adds to the sensitivity of the ?uid
degree of slowness corresponding to the exactness
operated device and makes possible the use of
sought. Greater exactness is attainable in set
the same for delicate adjustment of the working
manual control lever.
ting the piston when it is moved slowly.
tools. The distributing valve parts I14 and I15
Referring now to Figures 2 and 8 to 11, in
are held together by bolts I88 shown in section
in Figure 8.
clusive, there is shown the distributing valve ar
rangement to which ?uid is delivered from the 60
Associated on the quadrant 55 and pivoted at
?uid supply pump source under pressure and
58 is a gauge lever 21I . This lever is such that it
distributed for supplying ?uid to two different
fluid-operated devices, only one of which is shown.
can be moved over the quadrant and selectively
set thereon. Should the working tool be adjusted
In these tractor-mounted arrangements it is cus
in its working position and later ‘the same be
tomary to have implements or working tools lo 65 raised to a position of transport on the tractor,
cated at opposite sides of the tractors and it is
said tool can be returned precisely to the said
desirous that these working tools be operable
working position by returning the control lever to
independently of each other. For this purpose
its initial position beside the lever 21L Thus, the
there are often provided two different cylinder
lever 21I serves as a tell-tale stop against which
devices for actuating the different tools. As 70 the lever 54 can be set.
viewed. in Figure 8, it will be noted that there
The present apparatus makes expedient use of
are two high pressure openings I10 and HI, The
?uid as a power transmitting medium for per
pressure opening I10 is ‘for delivering ?uid to
forming the actual work in manipulating and ad
the ?uid-operating device 62, whereas the pres
justing cumbersome or inaccessible parts or the
sure opening I1I is for delivering fluid to a sec
like under remote manual supervision. Said ap
from the tractor power plant, said motor being
drivable ‘in opposite directions by respective
paratus is especially adapted for power control
of the working tools on a tractor. The design and
modes of liquid introduction thereinto and be
ing hydraulically lockable against drive in either
.tools or the like to move substantially simulta Cl direction by precluding egress of such liquid
therefrom, valve >means for controlling ingress
neously with and precisely in accordance with the
and egress of the liquid with respect to the mo
movement of the manual lever 54. Any delay of
tor, said valve means being settable in a neutral
movement between the manual lever 54 and the
condition to prevent such egress and alternatively
working tool is practically imperceptible. In
other words, the movement of the working tool 10 settable in delivery conditions which cause the
introduction of ?uid into the motor for driving
is as instantaneous as if a hand-operated adjust
the same respectively oppositely, relatively mov
ing lever were directly connected therewith.
able valve means control counterparts of which
Another important advantage of the present
one is manually operated and the other driven
?uid control is its automatic restoration of the
by the motor and cooperable for setting the valve
force transmitter 19 to any position to which it
means to cause the motor to eiTect drive in an
has been set, should it drift from such position
amount and direction correlated with the
because of ?uid leakage at some point in the sys
combination of the parts utilize high pressure
?uid in a manner causing the remotely controlled
amount and direction of movement of the man
tem as along the cylinder wall from one side of the
ually operated counterpart and to hydraulically
force transmitter to the other. Fortuitous drift
111g of the force transmitter in either direction
will incur a movement of the diagonal cam slot
[65 relatively to the pin I69 therein for setting
the valve means to reestablish the fluid distribu
tion in the cylinder and thus correct the force
transmitter setting. Automatic corrections of
this kind will occur at intervals determined by
the speed at which an impairment or imperfec
tion of the system may allow drifting of the force
lock the motor as aforesaid following completion
of eachcorrelated movement; and means oper
ably connecting said motor with said tool to re
spectively raise and lower the same pursuant to
driverof the motor in opposite directions, where
by movement of the manual counterpart within
one zone of its movement range can positively in
our tool tillage depth adjustment correlated in
direction and amount with the movement of the
manual counterpart and whereby movement of
While I have shown and described but a single "
preferred embodiment, it should be understood
said counterpart into another zone of its move
ment range will incur movement of the tool into
that many changes may be made in the construc
the transport position.
tion, details and arrangement of the parts with
out‘departing from the spirit and scope of the
present, invention or sacri?cing all of the ad
3. In a mechanical organization for the prac
tice of a new tillage technique; a tractor; a til
vantages thereof.
What is claimed is:
lage tool disposed on said tractor for movement
between a lowered ?eld tillage position and an
elevated transport position and for depth ad
justment within the tillage position; a hydraulic
tice of a new tillage technique; a tractor; a tillage
power transmitting mechanism comprising a
pump driven by the tractor engine, a control
1. In a mechanical organization for the prac
tool disposed on said tractor for movement be
tween a‘ lowered ?eld tillage position and an
elevated transport position and for depth ad
justment within the tillage position; a power
transmitting mechanism, said mechanism in
cluding a motor energized by power received from
the tractor power plant, said motor being selec
tively energizable for moving a work member
thereof in either of opposite directions and effec
tive to lock said work member against movement
excepting during such energization, said mecha
member manually movable in selective opposite
directions, a ?uid-driven motor including a work
member positively movable in either of opposite
directions by selective directing of liquid into
such motor from the pump and hydraulically
lockable against movement in either direction at
selective points in its path of movement by the
trapping of liquid in said motor, valve means op
erable under control of said manual control mem-v
ber and of said work member to e?ect such di
nism also including a control member movable
recting and trapping of the liquid, connecting
in either of opposite directions to incur energi
zation of said motor for moving its work mem
ber coordinately in direction and amount with
the movement of such control member; and
means connecting said work member with said
means operably connecting said members with
the valve means, said manual control member
being operable through said connecting means
tool to respectively raise and lower the same pur
suant to the movement of the work member in
opposite directions, whereby movement of the
control member within one zone of its move
ment range will positively incur tool tillage depth
adjustment correlated in either didectio-n and
amount with the movement of said member and
whereby movement of the control member into
to operate the valve means for directing the liq
uid into the motor to initiate an ensuing move
ment of the work member correlated in direction
with the direction of the control member move
ment, the work member being operable through
60 said connecting means to operate the valve means
for hydraulically locking the said work member
incident to its said ensuing movement reaching
an amount correlated with the amount of con
trol member movement; and means connecting
another zone of such movement range will incur 85 said work member with said tool for raising and
lowering the same pursuant to movement of said
movement of the tool into the transport position.
work member in its respectively opposite direc
2. In a mechanical organization for the prac
tions, whereby movement of the control member
tice of a new tillage technique; a tractor, a tillage
within one part of its movement range will posi
tool disposed on said tractor for movement be
tween a lowered ?eld tillage position and an ele 70 tively incur tool tillage depth adjustment corre
lated in either direction and amount with the
vated transport position and for depth adjust
movement of such control member and whereby
ment within the tillage position; a hydraulic
movement of the control member into ‘ another
power transmitting mechanism including a hy
part of its movement range will incur movement
draulic motor into which propelling liquid for
driving the same is introduced by power obtained 75 of the tool into the transport position, and said
connecting means between the valve means and
said control member being constructed and ar
' 5. In a mechanical organization for the prac
tice of a new tillage technique; a tractor; a tillage
ranged to accommodate instantaneous manual
tool disposed on said tractor for movement be
movement of the control member selectively in
tween a lowered ?eld tillage position and an ele
its range in advance of the ensuing correlated 5 vated transport position and for depth adjust
movement of the tool at a speed functional of
ment Within the tillage position; a hydraulic
liquid delivery to the motor.
power transmitting mechanism including a hy
4. In a mechanical organization for the prac
draulic motor into which propelling liquid for
tice of a new tillage technique; a vehicle having
driving the same is introduced by power obtained
an associated power plant from which power is 10 from the tractor power plant, said motor being
obtained for propulsion of such vehicle across
drivable in opposite directions by respective
a tillable ?eld; a tillage tool on said vehicle for
modes of liquid introduction thereinto and being
movement between transport and soil-working
hydraulically lockable against drive in either
positions and for depth adjusting movement
direction by the preclusion of egress of such
within the soil-working position; and a hydrau 15 liquid therefrom, valve means for controlling in
lic system for effecting and controlling such tool
gress and egress of the liquid with respect to the
- movements, comprising a hydraulic pump driven
motor, said valve means being settable in a neu
from said power plant, a fluid-driven motor in
tral condition to prevent such egress and alterna
cluding a work member connected with said tool
tively placeable in delivery conditions which
and movable in opposite directions to respective 20 cause the introduction of liquid into the motor for
ly lower and raise the same, said Work member
driving the same respectively oppositely, said
being subjectable to liquid columns at opposite
valve means including successively operable
sides thereof to alternately drive the same in
stages of relatively small and large ?ow capacity
opposite directions by the alternate application
and being controllable to vary the rate of ?ow in
to said columns of the pressure of liquid from 25 each stage, and valve-operating means including
said pump while the other of said columns is al
a manual component manipulatable for placing
lowed to exhaust, and valve means disposed be
the valve means in selected of said delivery con
tween said pump and said motor, said valve
ditions to determine the direction of motor drive
means comprising independently movable coun
and a component driven by the motor for re
terparts disposable in a neutral setting relatively 30 setting the valve means to the neutral condition,
to one another to condition the valve means for
said valve-operating means components being
preventing exhaust of either of said liquid col
cooperable for rendering the flow capacity stages
umns from the motor to thus hydraulically lock
of either delivery condition as Well as the flow
said work member, one of said counterparts being
rate within the selected stage selective under
manually movable from the neutral setting to 35 control of said manual component for causing
manipulate the valve means for selectively sub
the motor to drive at desired speeds in direction
jecting said liquid columns to the pumped liquid
and distance correlated with the speed, direction,
while connecting the nonsubjected column with
and distance of the manual component manipu
exhaust, and the other of said counterparts be
lation; and means operably connecting the mo
ing connected for movement with the work mem 40 tor with said tool to raise and lower the same
ber in its ensuing movement to reestablish the
pursuant to and in accordance with the speed
neutral setting of said counterparts upon move
and distance of drive of the motor in its re
ment of the work member and tool an amount
spective opposite directions.
correlated with the amount and direction of
movement of the manually moved counterpart.
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