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Патент USA US2407763

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Sept. 17, 1946.
J. MORKOSKI
2,407,762
MECHANICAL POWER LIFT
Filed NOV. 15, 1944
‘S‘Sheets-Sheet 2
Sept. 17, 1946.
J_ MORKQSK]
MECHANICAL POWER LIFT
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Filed Nov. 15, 1944
117
II
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#8
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2,407,762
v ‘ s Sheets-Sheet s
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Patented Sept. 17, 1946
2,407,762
UNITED’ STATES PATENT‘ OFFICE ,'
MECHANICAL POWER LIFT
James Morkoski, Canton, Ill., assignortolnter
national Harvester Company, a corporation of‘
New‘ Jersey
Application November 15, 1944, Serial no. 563,597. r
(01'. 74-388)
' 8 Claims.
‘
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2
1
This invention has to do with power lifts for
tractors and relates more in particular to appa
ratus of this character that is operable for ob
taining drive of a force exerting driven member
from a constantly rotating drive assembly, in
The apparatus contained within and mounted
upon the casing i3 is for taking power‘from a
rotating shaft I'Lextending rearwardly from the
tractor transmission. change-speed gear com
partment l8 for selectively rocking a rock-shaft
l9 in‘opposite directions. Thisrock-shaft is ro
either of opposite directions under thesuper
tatively supported within rear portions of tractor
fenders 2| and 22 ‘respectivelyshown in Figs.
vision of a manually operable control. .
The general object of this invention is the pro
vision of an inexpensive power lift device em
2 and 1. _ Such rocking of the shaft .1 B is brought
ploying mechanical force-transmitting members
exclusively to drive awork member selectable
distances and directions by force derived from
about by rotating. a driven element 23 of the
‘a constantly rotating part. ‘,
Another object is the provision of a power lift
assembly including power reversing meansand
apparatus in opposite directions. The means for
controlling'the direction of rotation of the driven
element 23 will'be described hereinafter, but, for
the present it should be noted that this driven
elementds connected‘ through a universal joint
controls installable as a unit upon a tractor from
24 with. a worm shaft 25, and that this. worm
which power is obtained.
shaft has its threads meshed with the internal
threads of a running nut 26, which‘is pivotally
‘
Another object is the provision of a novel con
connected at 21 to an arm 28. This arm is free
trol unit including members independently rotat
able respectively manually and by the work mem 20 ly rotatable uponthe shaft l9 and has a hook
like portion 29 associated with a rock-shaft arm
ber to select the direction and distance the work
member is driven.
V
' 3| vforcausing pivotal movement of this latteriarm
when the-arm 28 is caused to‘ pivot .byadvance
‘ment of. the running nut in one directionor ‘the
comprehended upon reading the ensuing descrip .25. other along. the threaded member 25. A ground
working tool or the like, not shown, may be con
tion with reference to the annexed drawings,
nected ‘to the outer end of the arm 3!. A sec
wherein:
The above and other, desirable objects will be
come apparent and their signi?cance more fully
ond arm similar to the arm‘ 3!, but not shown,
Fig. 1 is a side elevational view of a tractor
,is operably connectedtherewit-h through a length
with the rear wheel removed from the adjacent
side of the tractor for disclosing, in side elevation, 30 wise adjustable link 32, an arm 33 having its hub
a?ixed to the rock-shaft l9 and said rock-shaft
a‘ preferred embodiment of the invention mount
to which a hub portion of the second arm 3|,
ed upon the tractor body adjacently to, its rear
end;
not shown, is ?xed.
Fig. 2 is an enlarged view of the rear end of
the tractor, taken from the opposite side that is
illustrated in Fig. 1 and showing in Verticalsec
tion the essential operating parts of the present
embodiment of the invention;
Fig. 3 is a sectional view taken on the line
3-—3 of Fig. 2, illustrating a novel type of clutch
control for the apparatus; and
_
‘ ,
Fig. 4 is a view of the control apparatus taken
on the line 4—4 of Fig. 3.
One of the advantages of the present appa
ratus is its adaptability for being mounted upon
the rear portion of a tractor, as it in Fig. l,
with the manual control lever | I thereof con
veniently accessible to an operator at the ‘op
erator’s station including a seat [2. Gearing,
clutches and control parts of the apparatus are
contained within a casing l3, which is detachably
connected with the tractor body M by cap screws
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.
i
,
In the operation of the apparatus, the position
of the running nut 26 axially of the threaded
member 25,“ and consequently the pivoted posi
. tion ofthe rock-shaft arms 3|, is correlated with
the manually selectable position of the control
arm ll overits quadrant 34; that isymovement
of the control arm I I in a rearward direction over
the quadrant 34 will cause counterclockwise move
ment of the rock-shaft arm 3| as viewed in Fig.
2, and a forward movement of the control lever
H will ‘cause clockwise rotation or rocking of
. the rock-shaft arm 3|. .The amount of move
ment of the control lever H along its quadrant
incurs a correlated amount of movement of the
rock-shaft arms both in amount and direction.
Yieldable drive for the apparatus is obtained
through a collar 35 constrained for rotation with
said shaft, va helical spring 36 having one end ‘se
‘cured to the collar by a set screw 3'! and a sleeve
38 yoscillatable on the shaft l1 and secured to the
It. An opening I6, Fig. 2, in the top of the
, opposite end of the spring by a set screw 39.‘ A
tractor body is closed, in part, by the casing I3
when the latter is assembled on the tractor.
55 gear 4!‘ on the front endof the sleeve ‘38 ‘drives a ,
2,407,762
6
'5
into the position d. This causes‘ clockwise rota
Adjuster ring 99 is axially oppositely movable .
from a neutral mid-position into respective
clutch-engaging positions. These positions are
indicated by dot-dash lines respectively desig
tion of the'bell-crank 96-91 ‘and rearward move
ment of the‘link 89 for causing engagement of
the clutch 55 in the manner hereinabove' de
nated d, n and u in Fig. 4. , Said adjusterring
scribed. This establishes the reverse power train
4‘I-—‘49—48 for driving the worm member 25 in
the direction for advancing the nut ‘26 rear
wardly and lowering the outer ends‘ of the ‘rock
and I05 rotatively supported in opposite side wall.
arms 3|‘. Pursuant to this backward advance of
openings I96 and I01 of the casing I3. Mem
ber I02 is manually rotatable by the lever II 10 the nut 25' and counter-clockwise rotation of the
arm 28, the link II6 will be pulled backwardly by
and is connected thereto through a hub I08 of
said arm whereby the arm “2, Figs. 2, 3, and 4,
such lever and interlocking boss means I09 upon
will be rotated counter-clockwise,‘ as viewed in
the end ,of the lever hub and upon the journaled
is mounted upon relatively rotatable and coax
ial members I 02 and I03 having end portions I04
Fig. 2, for moving the pin‘IZI relatively to the
portion‘ I04 of the member I02. The constitu
ents of the boss means are retained in mesh by 15 slot I22 while the hand lever II, the rotatable
member I02 and the ring 99 remain set. Thus the
a capv screw III. Rotation .of the member I 03
pin I2| is operated by the ensuing movement of
is accomplished by an arm II2 having a‘hub
the parts driven by the rotating worm 25 for
‘II3 journaled in the casing opening I01 ‘and
reestablishing the pin |2| into the neutral posi
meshed boss means I I4 upon said hub and the
journaled part |05 of the member. A cap screw 20 tion in the diagonal slot portion I23 pursuant to
shifting the ring 99 back to the neutral position n
“5 retains the hub H3 and the journaled por
upon the ensuing movement progressing an
tion I05 in assembly. Arm “2 is connected with
‘amount correlated with the distance of manual
movement of the hand lever I I. Movement of the
control lever I I forwardly will result in ‘the rock
the reversibly moved driven arm 28 by a link I I6.
‘Rotatable member I 02 contains a diametrical
pin II'I projecting radially outwardly into axial
slots 7| I 8 in the adjuster ring 99. Another pin,
I2I‘, is similarly contained within the rotatable
member I23, and opposite end portions of this
pin project into respective circumferentially ex
shaft arms 3| being lifted or moved clockwise,
and this clockwise movement will cause the link
M5 to be moved forwardly for reestablishing the
neutral of the control device including the rela
tively rotatable members I02 and I03. Such
‘forward movement of the control lever II will
cause rotation of the member I02 and of the ring
99 clockwise, as viewed in Fig. 2, relatively to
tending slots I22 in the ring 99. These slots I22
are similarly shaped'and the pro?le of the upper
thereof is showninFig.4.
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V
Those end portions of the pin II'I projecting
the member I03 whereby the pin I2I will deflect
into the axial slots “8 constrain the adjuster
"ring 99 and the rotatable member I02 against
the ring axially from the neutral position 11.
to the position 11, whereby the bell-crank 96——9'I,
the link 89, and the shifter fork 85 will be manip
relative rotation while facilitating axial move
ment of said ring relatively to said member. The
end portions of the pin I2| are cooperable with
ulated for causing engagement of the clutch 59 ~
to incur‘ rotation of the worm 25 in the direc
I22 (of each of the slots_|22) for causing axial 40 tion opposite to that previously described and
clockwise movement of the rock-shaft ‘I9 and of
movement of the ring when rotative movement
an intermediate diagonal portion I23 of the slot
occurs between the ring and the member I03, or
since the pin II ‘I prevents relative rotation be
tween the ring and the member I02, this axial
the arms 3 I. This clockwise rotation of the parts
propelled from the running nut 20 will cause
movement of the ring occurs upon relative ro
the rotatable member I03 clockwise for overtak
ing its initial rotative position relatively to the
the link, IIB to be projected forwardly’ to rotate
tation between the members 102 and I03. When
.the pin |2I is in the mid-portion of the diagonal
slot portion I23, the ring will be in the neutral
position n. Relative rotation of the members
member I02, whereby the pin |2| will deflect ring
99 from the u position back to the 71. position
disengaging the clutch 59, causing the rock-shaft
to stop after it has rotated an amount correlated
with the amount of forward advancement of the
control lever II. Either forward or rearward
I02 and I03 in one direction will cause axial dis
placement of the ring toward position d, whereas
relative rotation in the opposite direction will
movement of the control lever II will, therefore,
cause movement of the ring toward position u.
incur rocking of the rock-shaft and the arms
Endwise or axial movement of the ring is, of
course, incurred only while the pin is in the 55 3| an amount correlated in direction and 'dis
tance with the movement of said control member.
diagonal slot portion I23. The offset slot ex
Having thus described a preferred form of the
tensions I24 and I25 accommodate the pin dur
‘invention with the view of clearly illustrating
ing continued rotation of the ring relatively to
the member I03 after the axial positions at and
u have been reached.
In Fig. 2 the manual lever II is shown sub
stantially at its most forwardly advanced posi
tion, which has caused the power transmitting
60
the same, I claim:
1. In a mechanical power lift utilizable upon
a tractor having a horizontal power supplying
shaft, a rock-shaft disposed transversely of the
power supplying shaft, and a rock-shaft'rocking
vdevice to rotate the worm shaft 25 in the direc
tion to advance the nut 26 forwardly for rais
arm having a power receiving portion disposed
position, that is, to their most clockwise posi
and inclined upwardly therefrom generally
65 above the power supplying shaft; a rotatable
' structure driven from the power supplying shaft
ing the rock-shaft arms 3| to their most elevated
toward the power receiving portion of the rock
shaft rocking arm, a rotatable driven member
lower the rock-shaft arms 3|, the operator will
move‘ the hand lever II backwardly or to the 70 coaxial with said rotatable structure, worm and
running nut means associated with said rotatable
left as viewed in Fig. 2. Backward movement of
driven member for connecting the same with the
the hand lever causes counter-clockwise rotation
power receiving portion of the rock-shaft rocking
of the member I02, as viewed in Fig. 2, and also
arm to cause rocking of said arm and of the rock
of the ring 99 relatively to the rotatable member
~ I03 causing axial displacement of the ring 99 75 shaft in. either direction depending upon the
tion as viewed in Fig. 2. I When it is desired to
2,4037176.2
7
8.
direction the driven member is, rotated, gears;ro-'
tatable ,coaxially about and spaced axially of said
helical element with the- rotating driving struc
ture. whereby to incur selective expansionvof such
structure, va clutch actuatable to drivingly con
nect, one of said gears with said structure, the
helical ‘elements, and said helical elements being
resilient toincurv self-contraction and release of
other gear being ‘constrained for rotation with
their-clutch when the opposition to movement of
the-driven member, a reversing power train for
their, opposite ends is removed.
;
4. In a power-transmitting, unit detachably
driving said other gear and hence the driven
member from the onegear ‘oppositely to the di
rection the structure rotates when said clutch is
actuated, a second clutchactuatable to drive the
mountable ‘upon a tractor body containing taro
tatable shaft} and having an opening through
'10 which said shaft is drivingly associatable with
driven member from and in thesamedirection
the unit; a casing attachable to the tractor body
incovering relation with said opening, a rotat
able-structure journaled in said casingt means
asisaid structure, and means for selectively actu
ating said clutches.
_
for drivingly connecting said shaft in drivingrre
,2. In a mechanical power lift utilizable upon a
tractor having a power supplying shaft, a rock 15 .lation with said rotatable structure when the
shaft, and a rock-shaft rocking arm; a rotatable
casing is attached to the tractor body, ‘a driven
structure driven from the power supplying shaft
eiement'journaled in said casing coaxially with
and extending generally toward said arm trans
said structure, a reverse power train in said cas
versely of the axisa-bout which it rocks invrock
ing, said power train being establishable in driv
ing the rock-shaft, a rotatable driven member 20 ing relation between the structure and the driven
element for driving such element reverselywith
coaxial with said rotatable structure, a running
nut on said arm, a worm shaft having its threads
respect to the direction of rotation of said struc
meshed with, those in the nut and extending end
ture,said driven element being establishable‘ in a
»wise-irom said driven member, a universally ar
direct driving connection with said structure for
ticulate device drivingly connecting the worm
shaft with the driven member, said worm shaft
25
rotation in unison therewith‘, clutch'means in
said ‘casing selectively actuatable for individually
establishing the driving'relation of said power
train and of said direct driving connection, ‘and
clutch control means also in said casing, said con
andinut beingcooperable torock said arm in
opposite directions coordinately with rotation of
said driven member in opposite directions, gears
rotatable coaxially about and spaced axially of 30 trol means including. a pair of coaxial independ
ently, rotatable ,rne‘mbers, vclutch actuating means
said'structure, a clutch actuatrabler to drivingly
connect one of said gears with said structure, the'
jointly controlled by saidrnernbers to move axially
other gear being constrain-ed for rotation with
the vdriven member, a reversing power train for
thereof from a neutral setting ‘in opposite direc
tions responsively. to oppositerelative rotation of
driving said ‘other gear and hence the driven
member from the one gear oppositely to the di
said members, said clutch actuating means be- ,
ing operable, when moved in one axial direction,’
to actuate the clutch means for incurring direct
rection the structure rotates when said clutch is
drive of the driven element and operable, when
moved in the opposite axial direction, to actuate
the clutch meansfor incurring reverse drive of
actuated, ‘a second clutch actuatable to drive the
“driven member from and in the same direction as
said structure, and means for, selectively actuat
ing said clutches.
the driven element, manually operable means for
,
3,. In a power-transmitting device receivable
V rotating one of said members to obtain selective
‘of driving force from a, continuously rotating '
relative rotation thereof, and means operated by
driving member, a rotatable driven member, a
the driven element pursuant to its ensuing rota- ,
. rotatable driving structure drivable unidirection
a=lly.frem said driving member, a clutch compris
ing a helical element disposed concentrically
about the driving structure and having an end
portion drivingly associated therewith to cause
45 tion for rotating the other of said members in the
unitary rotation of such element and structure, ,
said‘clutch' also comprising a sleeve embracing
thehel-ical element vand engageable by saidele
ment to be driven thereby incident toexpansion
thereof, a-second clutch comprising a second hel
ical element disposed concentrically about the
direction to reestablish the neutral position‘ of
the clutch actuating means.
i
_
5. In a power-transmitting device receivable of
power from a constantly rotating driving ele
ment; ,a reversibly rotatable driven element, drive '
meansadjustable for establishing driving con
nections between the driving element and said
driven element for respective; drive of the latter
in opposite directions, and a control for said
drive means comprising coaxially rotatable mem
driving structure and having an end portion driv
bers capable of independent rotation, a ring dis
posedcoaxially with said independently rotatable
ingly associated therewith ‘to cause unitary rota
members, means constraining said ring from'ro
t-ionof;-such element andv structure, this second
tating relatively to one of said members but fa
clutch also including a sleeve ‘embracing its heli
cilitating axial movement relative thereto, means
cal element to be driven thereby upon expansion
60 associated with the other, of said, membersfor
of such element, a gear constrained for rotation
shifting the ring axially of such members when
with the ?rst sleeve, a second gear constrained
relative rotation thereof is incurred, the last-‘
for rotation with the second sleeve and also with
named means being operable for shifting the
the driven member, a reversing gear disposed be
ring axially in one direction from a neutral set
tween the ?rst two gears for rotation about an
axis transverse to the axis of the ?rst gears and
ting ,incident to relative rotation in one direction
mutually meshed with the ?rst gears to drive the
and operable for shifting the ring axially in the
opposite direction from the neutral setting upon
second thereof, and hence the driven member,
_ from and reversely with respect to said structure
relative rotation of the members in the opposite
upon expansion of the ?rst helical element, said
70. direction, operating'means connecting said
driven element being drivable unitarily with and
with said adjustable drive means for placing; the
from said structure through the second clutch‘
latter in a neutral condition wherein no driving
vupon expansion of the second helical element,
connection thereof is established ‘between the
and clutch control means selectively operable to
driving element and the driven element when
opposermovement of the opposite end of either 75 said ring is in its-neutral position, said operating
2,407,762
means ‘being operable when the ring is shifted
axially in one direction from neutral to adjust
the drive means for driving the driven member
in one direction and operable when the ring is
shifted in the opposite direction from its neutral
to adjust the drive means for driving the driven
member in the opposite direction, manually oper
able means for effecting relative rotation between
said members to selectively axially shift said ring,
10
relative rotation of said members in the opposite
direction causing axial movement of the ring in
the opposite direction from said neutral posi
tion, said ring being effective to incur the qui
escent status of the driven element when in the
neutral position and being effective to incur the
drive‘ of the driven element in opposite direc
tions when in respective of the other opposite
positions from the neutral, means for manually
and means connected between said driven ele 10 rotating one of said members, and means driven
by the driven element during its ensuing move
ment and the other of said members for produc
ment to rotate the other member in the direction
ing relative rotation between said members for
for reestablishing the neutral setting of said
reestablishing the neutral setting of the ring in
adjuster ring.
cident to the driven element being driven in an
8. In a power-transmitting unit detachably
amount correlated with the amount of movement
mountable upon a tractor body containing a ro
of the manually operable means for incurring
tatable shaft from which power is receivable by
the drive of the driven element.
said unit, a casing attachable to the tractor body,
6. In a device utilizable as a control for mech
a rotatable structure within said casing and ex
anism adjustable to incur a quiescent status of a
tending in a fore and aft direction relatively to
driven element or alternatively to incur statuses
the tractor when the casing is attached to its
of drive of such element in opposite directions;
body, means for drivingly connecting said shaft
the combination of coaxial independently rotat
in driving relation with the rotatable structure
able members, an apparatus adjuster disposed
when the casing is so attached, a driven. element
contiguously to said members, said adjuster be
ing disposable axially of said members into a 25 journaled in said casing coaxially with said struc
ture and drivable therefrom in either of opposite
neutral position wherein it is effective to incur
directions, a reverse drive power train disposed in
the quiescent status of the driven element and
said casing, clutch means in said casing for al
also being disposable oppositely from the neutral
ternatively connecting the rotatable structure
axially of said members into positions wherein it
is effective to incur the drive of said element re 30 and the driven element through said reverse
dn've power train or for directly connecting said
spectively in the opposite directions, means con
structure and the driven element for rotation in
straining rotation of the adjuster with one of
unison, said clutch means comprising an actuator
said members while facilitating movement there
part movable from a neutral position axially of
of axially of said members, means on the other
of said members reactable upon a portion of said 35 the structure in opposite directions to respective
ly establish the reversing or direct connections
adjuster to axially move the same during rela
of the clutch means, a pair of members inde
tive rotation of the members and in an axial di
pendently coaxially rotatable about an axis dis
rection depending upon the direction of relative
posed transversely of said rotatable structure, a
rotation of said members, means for manually
clutch adjuster ring disposed about said mem
rotating one of said members, and means driven
bers, said ring having a circumferential groove, a
by the driven element during its ensuing move
bell-crank having a leg extending radially from
ment to rotate the other member in the direction
said ring and with its free end disposed within
for reestablishing the neutral setting of said
said groove, the other leg of said bell-crank. pro
adjuster.
jecting axially of the ring and having its free end
7. In a device utilizable as a control for mech
connected with said part of the clutch means and
anism adjustable to incur a quiescent status of
being movable axially of said structure pursuant
a driven element or alternatively to incur statuses
to axial movement of said ring to cause aforesaid
of drive of such element in opposite directions;
movement of the clutch part axially of said struc
the combination of a casing having opposite
walls containing coaxial bearings, independently
ture, said ring being disposable axially of said
rotatable members disposed within the casing
and journaled in said bearings, an apparatus ad
juster ring disposed about said members, said
ring having an axial slot in radial registry with
, members into a neutral position wherein it is op
one of said members and a circumferential slot
. tively set the clutch actuator part for incurring
era'ble through said bell-crank for establishing
the neutral position of the clutch part into op
posite positions wherein it is effective to respec
the reverse or direct drive of the driven element,
in registry with the other of said members, said
means constraining rotation off-the adjuster ring
circumferential slot having a mid-portion dis
with one of said relatively rotatable members
posed diagonally of said members and end por
while facilitating movement thereof axially of
tions at the respective ends of said diagonal
portion, a pin in the one member projecting in 60 said members, means on the other of said mem
bers reactable upon a portion of said. adjuster
to the axial slot associated therewith to constrain
ring to axially move the same during relative
said member and the ring against relative rota
rotation of the members in an axial direction
tion while facilitating axial movement of the
depending upon the direction of relative rotation
ring relatively to said member, a pin in the other
member normally projecting into the mid-portion 65 of said members, means for manually rotating
one of said members, and means driven bythe
of the circumferential slot and being thus coo-p
driven element during its ensuing movement to
erable with said mid-portion of the slot for cam
rotate the other member in the direction for re
ming said ring axially pursuant to relative rota
establishing the neutral setting of said actuator
tion of the members, one direction of relative ro
tation causing axial movement of the ring in 70 ring.
one direction from the neutral wherein the pin
is in an intermediate section of said mid-portion,
JAMES MoaKosKI.
E. w. NORTH HAL
}
.FURNITURE HANDLE
Filed April 10, 1944
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