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Патент USA US3040920

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June 26, 1962
J. M. JOHNSON
3,040,908
EQUIPMENT HANDLING DEVICE
Filed May 26, 1960
5 Sheets-Sheet 1
ATTORNEY
June 26, 1962
3,040,908
J. M. JOHNSON
EQUIPMENT HANDLING DEVICE
Filed May 26, 1960
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June 26, 1962
J. M. JOHNSON
3,040,908
EQUIPMENT HANDLING DEVICE
Filed May 26, 1960
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Patented
3,049,903
EQUIPMENT HANDLENG DEVICE
John Melvin Johnson, Ill’? 8. 2nd St, Lindshorg, Karts.
Filed May 26, 1969, Ser. No. 31,987
8 Claims. (Cl. 2l4--1)
This invention relates to an equipment handling device,
26, E952
In the embodiment of the invention illustrated in the
drawings, the numeral 1-9 generally designates a lifting
and lowering device comprising a frame or carriage 11,
a pivotal lift arm assembly 12, and a cradle assembly 13.
In FIGURE 1 a conventional hydraulic jack M is illus
trated by broken lines in combination with the lifting
device iii and, for illustrative purposes, an automobile
and more speci?cally, to a device for lifting, lowering
differential i5 is represented by broken lines and is shown
and supporting mechanical components such as the trans
supported by cradle 13.
mission and differential assemblies of motor vehicles.
1O
Carriage ll. includes a pair of tubular legs 116 ‘which
In the repair of overhaul of automotive transmissions,
are provided with horizontal front portions 17 and up
differentials, engines and the like, it is often necessary to
disconnect the component requiring repair and to lower
it from the vehicle in which it has been installed. Since
wardly and rearwardly sloping rear portions 118. Pref
erably, the rear portions of the legs converge somewhat
in an upward direction and, at their upper ends, merge
such components frequently weigh several hundred 15 with tubular support posts 19. The spaced upstanding
pounds, some mechanical assistance is ordinarily required
support posts 19 have their lower ends welded or other
in lowering them from their vehicles and later lifting
wise rigidly securcd to a cross member 23» equipped at
them into their original positions. A conventional me
its outer ends with caster units 21. From FIGURES
chanical or hydraulic vehicle jack is generally unsatis
2 and 1 it will be observed that the support posts 19 are
factory for this purpose because of its failure to provide 20 inclined upwardly and rearwardly and that their lower
adequate support for machinery of irregular shape, with
ends and cross member 2d are disposed well ahead of
the resulting danger that the detached piece of machinery
the upper ends of the support posts and between the
might topple from the jack, and because the movement
rear portions 18 of legs 16.
of such a jack is ordinarily limited to vertical directions.
The free ends ‘of leg portions 17 are provided with
At the very least, the use of a conventional jack in re 25 casters 22. If desired, reinforcing bars 23, connected
moving a mechanical component such as an automobile
to the lower ends of support posts 19 and leg portions
transmission is a difficult and tedious procedure and the
18 and spanned by transversebar 24, may be provided
reverse operation of replacing the repaired transmission
to prevent spreading of the tubular members when sub
is even more di?icuit since there is seldom anything to
jected to unusually heavy or excessive loads.
guide the worker in properly positioning the item upon 30
The lift arm assembly 12 is pivotally connected adjacent
the jack so that it may be lifted and returned to its
one end thereof to the apex of carriage ll and comprises
original position.
a pair of spaced arms 25 and 2d. Directly above the
Accordingly, a main object of the present invention is
cross member it) of the carriage and spaced in front of
to provide an improved lifting and lowering device which
the pivotal connection between the lift arm assembly and
is particularly adapted for easily and quickly Withdraw
the carriage is a transverse member 27. This member
ing and replacing mechanical components such as the
may be welded or otherwise secured to arms 25 and 26
engines, transmissions and differentials of automobiles
and prevents independent pivotal movement of each arm
and other motor vehicles. Another object is to provide
about pivot pin
As shown most clearly in FIG
a lifting, and lowering device which is adjustable for
URES l, 2 and 4, pivot pin 23 passes transversely through
?rmly supporting a mechanical component and for lift 40 annular bearings 29 affixed to the upper ends of posts 19.
ing and lowering that component with reference to the
The pin also passes through a bearing sleeve 3%} which
equipment of which it forms a part, the device being rela
spans the apertured ends of the lift arms and which is se
tively safe for such use because of the full support it
curely a?ixed thereto by welding or any other suitable
provides. A further object is to provide a portable sup
means. Thus, the lift arm assembly 12 is pivotally con
porting and carrying device for lowering, lifting and mov
nected to the upper rear end portion of the carriage for
ing mechanical units, the device being adapted to pro~ 45 pivotal movement in a vertical plane between raised and
vide ?rm support for the unit carried thereby as the
lowered positions (FIGURES 5 and 7).
portable device is moved about.
Unlike arm 25, arm 26 is jointed, being provided with
A still further object is to provide a device for lifting
a front portion 31 and a rear portion 32-. Front portion
and lowering vehicle transmissions and other pieces of
31 is connected to the rear portion for independent move
machinery, the device being constructed so that an article 50 ment in a vertical plane by means of transverse pivot pin
or component supported thereby may be lifted along the
33. Referring to FIGURES l and 5, it will be noted that
same are through which it was lowered and may be lo
the front portion of arm 26 is generally L-sheped and has
cated in its proper position with ease and dispatch. An
:1 depending rear section 34 connected to the clevis end
other object is to provide a relatively inexpensive device
of internally threaded tube 35 by means of pin 3-6. A
adapted to be coupled with a conventional jack, for the
crank 37, which is rotatably connected to the rear portion
removal and replacement of heavy or bulky mechanical
of arm 26 by means of bracket 38, has a threaded crank
components.
shaft 39 received within the internally threaded tube 35.
Other objects will appear from the speci?cation and
Since bracket 35; restrains axial movement of the crank
drawings in which:
37 and shaft 39, rotation of the crank results in axial ex
FIGURE 1 is a perspective view of a device embody 60 tension or retraction of tube ‘35 and pivotal movement of
ing the present invention;
FIGURE 2 is a top plan view of the device;
FIGURE 3 is an exploded perspective view of the
cradle assembly of the device;
FIGURE 4 is a fragmentary perspective view of the 6
longitudinal tilt control mechanism for the cradle;
the front portion 31 of arm 26 with reference to the rear
portion of that arm.
In the embodiment illustrated in the drawings, a hy
draulic jack 14 is rcmovably supported upon the carriage
for lifting and lowering the pivotal lift arm assembly 12.
As shown most clearly in FIGURE 7, an inverted cup
shaped element 4% is ?xed to the underside of transverse
member 27 and the socket of this cup-shaped element
to FIGURE 5 but showing the cradle in laterally tipped
loosely receives the upper end of jack piston 41. The
70
condition;
body of the jack is supported upon cross member 2d ex
FIGURE 7 is a side elevational View showing the
tending between the rear casters 21 of the carriage. Since
cradle assembly in elevated position.
slight rocking movement of the jack will occur as the
FIGURE 5 is a side elevational View of the device;
FIGURE 6 is a broken side elevational view similar
3,040,908
3
lift arm assembly 12 is moved between its fully raised and
fully lowered positions, it is desirable to support the base
0 fthe jack upon the ridge of an inverted V-shaped mem
ber 42, extending longitudinally along the channel of cross
member 20.
Since the inverted cup element and the transverse mem<
ber 27 are disposed farther from the cradle assembly 13
than from the apex of the carriage frame, the range of
movement of the free end of the lift arm assembly is con
extends along a plane spaced from but parallel with a
plane passing through both lift arm 25 and the rear por
tion 32 of arm 26. A threaded shaft 62 extends into the
tube 61 through the rear end thereof.
The rear end
portion of shaft 62 is journaled in a yoke bearing 63
equipped with lateral pivot pins 64. The pins‘ are rotat
ably received within the apertures of rearwardly project
ing ears 65 (FIGURES 4 and 7). The ears 65 are se
cured to or formed as part of a cross-bar 66 extending
siderably greater than the range of possible movement of 10 between the upper ends of support posts 19 and support
the yoke 63 for pivotal movement about a horizontal
the jack piston. This is important in the removal or in
axis disposed below the main pivot axis for the lift arm
stallation of vehicle components such as transmission, dif
assembly 12. A crank handle 67 is a?ixed to the end of
ferentials and the like, since the size of such parts requires
shaft 62 behind yoke 63 and, upon rotation of the crank,
that they be moved substantial vertical distances before
complete withdrawal or replacement is effected. To rein 15 tube 61 is shifted axially to rotate or tip the cradle about
the axis of cross. shaft 46.
force the elongated lifting arms 25 and 26, I provide brace
In the use of the apparatus described above, jack 14
rods 43 (FIGURES l, 2 and 7) which cross between the
is actuated to lift cradle 13 into close proximity with the
arms adjacent transverse member 27. Speci?cally, each
transmission, differential, or other mechanical unit to be
rod extends from a point along the inner surface of an
removed from beneath a vehicle. The various elements
arm in front of the transverse member over that member
of the cradle are adjusted so that the mechanical com
and then rearwardly to a point along the inner surface
ponent seats snugly in place upon that cradle. After
of the opposite arm beneath bearing sleeve 36. The rods
removal of the ?nal connecting bolts which connect the
are welded or otherwise rigidly secured to the lift arms
component to the vehicle, jack 14 is again manipulated,
and provide a trussing effect to overcome twisting forces
this
time to lower the jack stern and thereby move the
25
when the load carried by the arms 25 and 26 is not uni~
formly distributed therebetween.
Each lift arm 25 and 26 is provided at the front end
cradle into the fully lowered position indicated by broken
lines in FIGURE 5.
In ?tting the cradle 13 to the underside of the trans
mission or other corn-ponent immediately before the re
cradle assembly 13 extends between the front ends of the
arms and is rotatably received Within the circular open 30 moval thereof, it may be found desirable to alter the
cradle position so that it assumes a longitudinal inclina
ings of the bearings 45. ‘Retaining means in the form of
tion. This is accomplished by rotating crank handle 67
upstanding’ lugs 47 and 48 at the ends of the shaft prevent
so as to tip the cradle either forwardly or rearwardly.
inadvertent detachment of the parts without restraining
It,is important to note that thereafter, when the cradle is
rotational movement of the shaft within the bearings. 7 As
thereof with a ring bearing 45.
A cross shaft 46 of the V
lowered, it remains tipped at substantially the same angle
shown in FIGURES 3 and 7, at least one of the lugs (lug 35
48) is removable from the shaft to permit withdrawal of
the shaft from the ring bearings when disassembly of the
parts is desired.
The cradle 13 illustrated in the drawings is particularly
suitable for supporting vehicle transmissions and differen
tials and comprises a pair of side channel members 49
carried by the cross shaft 46 having their rear ends re
ceived within the cavity of a box ?tting 50. The rear ends
of the side members may be extended or retracted within
the cavity and the intermediate portions of the members,
releasably secured to the cross shaft by U-shaped straps
51 and bolts 52, may be swung forward or away from each
other. In addition, extension elements 53 are slidably
received within the channels of members 49 and are pro
vided at their forward ends with upstanding posts 54 which
are slotted to retain the ends of a suitable chain (54a)
which may extend therebetween. The opposite ends of
the extension elements are equipped with rings 55 adapted
to receive the side channel members 49 therein for pre
venting movement of the extension elements when down
because of the parallel relationship between lift arm
assembly 14 and pivot tube 61.
In removing or installing a transmission, differential,
or other mechanical component, it may also be desir
able to tip the cradle laterally to a limited extent. Also,
it may be necessary to maintain the cradle at predeter
mined lateral and longitudinal inclinations while the
cradle is being raised or lowered. Lateral tipping of the
cradle is achieved by rotating crankvhandle 37 which
shifts tube 35 axially and pivots the front portion of the
' jointed lift arm 26 either upwardly or downwardly, de
pending upon the direction of crank handle movement.
For example, if the crank handle 37 is rotated to shift
tube 35 rearwardly, then, as shown in FIGURE 6, the
bearing ring 45 provided by the front portion 31
of arm 26 will drop downwardly below the level of the
other bearing ring. Cross shaft v46 will therefore tip
laterally as represented in FIGURES 1 and 6.
The location of the pivot axis at the apex of the car- riage frame permits the use of a common hydraulic ve
ward forces are applied to the upstanding posts thereof. ' hicle jack for the power unit. When the transmission lift
is not in use, the jack 14 may be easily removed
It will be noted that rings 55 extend laterally of the exten
therefrom and used elsewhere. This not only results in
sion elements and seat in notches 56 in the upstanding side
more efficient and versatile use of the equipment but
?anges of the members 49 to prevent sliding movement
also results in a transmisison lift of relatively low manu
of the elements ‘53 when they extend along the channels
cost.
‘
‘
in parallel relation with members 49. However, by lift 60 facturing
To prevent binding between the inverted cup ‘46 and the
ing the front ends of the extension elements, the rear
stem or piston of jack 14, the cup must either be capable
Wardly and downwardly inclined loops 55 are brought into
of swivel action or, in the case of the rigid mounting ,
vertical position, permitting disengagement of the loops
shown in the drawings, must have a socket of substantially
or rings from the notches 56.
65 larger diameter than the jack stem. Also to permit lat
Box ?tting 50 is equipped with a pair of wing screws 57
eral tipping of the cradle, the openings of ring bearings
which may be tightened for anchoring the rear ends of side
should be substantially larger than the maximum trans
members 49 in place. Extending upwardly from the top
verse dimensions of cross shaft 46 (exclusive of lugs 47).
of the ?tting 50 is a jig 58 for receiving and holding against
While in the foregoing I have disclosed an embodiment
lateral movement a portion of a mechanical component 70 of the invention in considerable detail for purposes of
illustration it will be understood by those skilled in the
supported by the cradle.
art that many of these details may be varied without
Referring ‘to ‘FIGURES 3 and 7, it will be noted that
departing from the spirit and scope of the invention.
the cross shaft 46 is provided with a depending lever
I claim:
arm 59 pivotally connected by pin 66 to the clevis end
of an internally threaded linkage tube 61. Tube 61 75 1. In an equipment handling device, a mobile car
5
3,040,908
riage, a lift arm assembly comprising a pair of lift arms
each having a rear end pivotally secured to said car
riage for pivotal movement between raised and lowered
positions about a horizontal axis, an eqnipment~support
ing cradle mounted at the opposite front ends of said
‘arms, one of said arms being jointed for articulative
movement in a substantially vertical plane independently
6
6. The structure of claim 4 in which said equipment
supporting means comprises a cradle having a trans
verse shaft, said lift arms being provided at the front
ends thereof with ring bearings receiving opposite ends
of said shaft.
7. An equipment handling device comprising a mobile
carriage having a plurality of wheels and a pair of spaced
of movement of the other of said arms, and means pro
upstanding rear posts, a lift arm assembly pivotally
vided by said one arm for articulative movement of the
secured at its rear end to the upper ends of said posts
same to alter the height of the front end thereof with 10 for pivotal movement about a horizontal pivot axis, said
reference to the front end of said other arm and for con
lift arm assembly comprising a pair of lift arms extend
trolled lateral tipping movement of said cradle.
ing forwardly and being spaced apart at the front ends
2. The structure of claim 1 in which said opposite
thereof, said front ends of said lift arms being provided
ends of said arms are provided with bearing rings, said
with bearing rings, a cradle disposed between the front
cradle being equipped with a cross shaft loosely re 15 ends of said arms and having ‘a transverse shaft rotat
ceived within said rings.
ably received within said ‘bearing rings, means for ro
3. The structure of claim 2 in which said cross shaft
tating said shaft and the cradle carried thereby into
is rotatably received within said rings for rotation about
selected inclined positions, one of said lift arms being
the axis thereof, and means provided by said device for
jointed for articulative movement in a substantially verti
‘axially rotating said shaft into a selected position and
cal plane to alter the height of the front end thereof with
thereafter holding the same in said position.
reference to the front end of the other of said arms, and
4. In an equipment handling device having a mobile
means provided by said one arm for articulating the same
carriage, a lift arm assembly comprising a pair of lift
and for controlled lateral tipping movement of said
arms each having a rear end pivotally secured to said car
cradle.
riage for pivotal movement about a horizontal axis,
8. The structure of claim 7 in which said one arm is
equipment-supporting means provided at the opposite
provided with front and rear portions pivotally connected
front ends of said arms, one of said arms being jointed
together, said last-mentioned means comprising a crank
and having a front portion and a rear portion pivotally
screw assembly carried by said rear portion and opera
connected to each other for pivotal movement in a sub
tively associated with said front portion for pivoting the
stantially vertical plane, said rear portion of said one
same upwardly and downwardly.
arm being rigidly secured to the other of said arms and
said front portion being pivotally movable with reference
to the other of said arms, and adjustment means provided
by said one arm for ‘articulating said jointed arm to
pivot said front portion with reference to the other of 35
said arms and thereby tip said equipment-supporting
means laterally.
5. The structure of claim 4 in which said adjustment
means comprises a crank screw assembly carried by said
rear portion and operatively associated with said front por 40
tion for pivoting the same upwardly and downwardly.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,073,998
Raby _______________ __ Mar. 16, 1937
2,643,779
Hamlin _______________ __ June 30, 1953
2,675,209
2,706,052
2,824,657
2,838,278
Freed ______________ __ Apr.
Trautman ____________ __ Apr.
Beasley ______________ __ Feb.
Johnsen ____________ __ June
13,
12,
25,
10,
1954
1955
1958
1958
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