JP6516560B2 - Vehicle lift device - Google Patents

Description

  The present invention relates to a lift device for a vehicle such as an X-link lift, a one-post lift, a two-post lift, and a four-post lift.

  Although the lift apparatus for vehicles raises and lowers a lift table with respect to a mount frame by a raising / lowering drive part, it has a descent | fall stop device for preventing an accidental descent | fall during lifting of a lift table.

  DESCRIPTION OF RELATED ART Conventionally, there exists a thing of patent document 1 as a descent | fall stop device of the lift apparatus for vehicles. The descent stop device includes claws supported by two rack type toothed members connected to the front end portion of a piston rod in a hydraulic cylinder device constituting an elevation drive unit and a support bracket provided in a cylinder of the hydraulic cylinder device. It has a pawl which is pivotally supported by a shaft and can be disengaged from the teeth of the toothed body.

  The descent stopping device has a spring for urging the claws to mesh with the teeth of the toothed body at the time of lifting and stopping of the lift table, and the vertical direction of the toothed body at which the claws are going to descend The descent of the lift table is mechanically locked at a position where it is crimped on and engaged with a steep slope on the rising direction side with respect to the valley bottom of each tooth arranged in the (rising direction-descending direction).

  In addition, the descent stop device has a solenoid for releasing the claws from the teeth of the toothed body when the lift table is lowered, frees the nails from the teeth of the toothed body and makes the hydraulic cylinder device contract. Allow the lift table to be lowered.

Japanese Patent Application Laid-Open No. 63-154599

  However, in the prior art, when raising the lift table by the raising and lowering drive unit, the gentle slope on the downward direction side with respect to the valley bottom of the adjacent mountain teeth of the toothed body to be elevated pushes the claws sequentially and moves in the upward direction Every time, the biasing force causes the biasing force to cause the pawl to fall from the peak to the valley of the tooth of the toothed body and collide violently with the tooth, thereby generating a high impact noise such as clicking. As the collision between the nails and the teeth of the toothed body occurs continuously at a constant interval during lifting of the lift table, an unpleasant clicking noise will be generated repeatedly.

  Also, in recent years, in order to give car owners a sense of security and confidence in vehicle maintenance, efforts are also being made to bring the car owners into the pit room where maintenance work is conducted and have them attend the maintenance work. Such an unpleasant sound may be associated with an abnormality in the lift device, which may lead to giving the car owner a sense of apprehension or mistrust.

  Incidentally, in the method of attaching the rubber to the teeth of the nail or the toothed body to reduce the collision noise of the both, the continuation of the effect can not be expected due to the deterioration of the rubber. In addition, when the lift table is unexpectedly lowered due to a defect in the elevation drive unit, a large load is applied to the meshing portion of the teeth of the claw and the toothed body, which may cause the rubber to be damaged immediately.

  An object of the present invention is to alleviate the collision between the claws and the teeth of the toothed body in the descent stopping device of the vehicle lift device, and to prevent the generation of an offensive collision noise at that time.

The invention according to claim 1 is that the lift table is raised and lowered by the lift drive unit with respect to the gantry, and toothed on one side of the first and second members that move relative to each other in conjunction with the lift table lift by the lift drive unit. The body is provided, and the support bracket provided on the other side thereof is provided with claws which can be engaged with and disengaged from the teeth of the toothed body, and the claws are engaged with the teeth of the toothed body when the lift table is lifted and stopped. Has biasing means for biasing, and the biasing means is supported by pulling on the hook provided in the support bracket and is hooked on the hook provided in the shoulder remote from the nail support shaft of the nail A lifting device for releasing the pawl from the teeth of the toothed body against the biasing force of the biasing means when the lift table is lowered, wherein the pawl comprises Drop into the valley of the toothed body of the toothed body Has a shock absorber that applies damping force to the biasing operation of to the coil spring, the shock absorber is made telescopic loaded in the inner diameter hollow portion of the coil spring, the for of the coil spring In a releasable relationship that is not connected to the two hooks, when the claws run on the crests of the teeth of the toothed body and the coil spring is in an extended state, a gap is formed between them and the hooks. The shock absorbers are pinched by their hooks when they are separated and the claws fall from the peak of the toothed body to the valley of the toothed body and the coil spring contracts .

  According to a second aspect of the present invention, in the first aspect, the elevating and lowering drive unit is composed of a hydraulic cylinder device, the cylinder of the hydraulic cylinder device is a first member, and the piston rod of the hydraulic cylinder device is a second member. It is intended to be a member.

(Claim 1)
(a) When raising the lift table by the raising and lowering drive unit, the gentle slope on the downward direction side with respect to the valley bottom of the adjacent mountain teeth of the toothed body to be raised pushes the claws in order to move upward (see FIG. Every time it moves in the direction, the biasing force of the biasing means causes the biasing force to fall from the peak to the valley of the tooth of the toothed body and to mesh with the tooth to mechanically lock the lowering of the lift table. To prevent an unexpected descent while the lift table is rising. At this time, the shock absorber applies a damping force to the biasing operation of the biasing means which drops the claws from the peak to the valley of the teeth. Therefore, when the nail falls in the valley of the tooth, the collision between the tooth and the nail produced based on the biasing force of the biasing means is mitigated by the damping force of the shock absorber, and an offensive collision noise at that time. To prevent the occurrence of
(b) When the claw is pivotally supported by the support bracket provided on the other of the first and second members via the claw support, between the support bracket and the shoulder remote from the claw support of the claw It can be equipped with a telescopic shock absorber.
(c) When the biasing means comprises a coil spring, the shock absorber is loaded into the inner diameter hollow portion of the coil spring to utilize the inner diameter hollow portion of the coil spring as an installation space for the shock absorber. The biasing means can be equipped compactly inside.

(Claim 2)
(d) When the lift drive unit is a hydraulic cylinder device, a toothed body is provided on one side of the cylinder as the first member and the piston rod as the second member, and a claw is provided on the other side thereof. The inside of the vehicle lift device can be equipped with a claw and a toothed body in a compact manner.

FIG. 1 is a side view showing a lift device for a vehicle. FIG. 2 shows a descent stop device provided in the hydraulic cylinder device, (A) is a front view, and (B) is a side view. FIG. 3 shows the main part of the lowering prevention device, (A) is a front view, and (B) is a side view. FIG. 4 is a side view showing a shock absorber loaded in an inner diameter hollow portion of a coil spring. FIG. 5 is a schematic view showing an example of a shock absorber.

  The vehicle lift device 10 shown in FIG. 1 is an X-type link type lift, and a pair of left and right lifting devices 20, 20 are provided to the left and right pits 12, 12 recessed in the floor surface 11 of the automobile maintenance area. The pair of left and right lift tables 30 and 30 moved up and down by each lifting device 20 can be stored. Since FIG. 1 is a side view of the vehicle lift device 10, only the left and right pits 12, the lift device 20, and the lift table 30 are shown.

  The lifting device 20 forms a lower X link mechanism 20L by pin-coupling the lower first and second links 21 and 22 at the lower X side in the X shape, similarly to the X The X-link mechanism 20U on the upper stage side is configured by pin-coupling the third and fourth links 23 and 24 on the upper stage side intersecting in a shape at the X-shaped intersection portion 20K. Then, the upper end of the first link 21 and the lower end of the fourth link 24 are pin-connected at the pin connection point 20P, and the upper end of the second link 22 and the lower end of the third link 23 are pin-connected at the pin connection point 20R. By combining, the lifting and lowering unit 20A in which the two X link mechanisms 20U and 20L forming the upper and lower two stages are connected is configured.

  The links 21 to 24 of the lifting device 20 are an assembly of a pair of left and right link plates, and the second to fourth links 22 to 24 connect the left and right link plates by a connecting plate, The space between the left and right link plates is closed. The first link 21 extends a hydraulic cylinder device 41 described later between the left and right link plates.

  The elevator 20A pivotally supports the lower end pivot point (lower end) 21A of the first link 21 to the rotation support 14 provided on the pedestal 13 inside the pit 12, and the lower end roller (lower end) of the second link 22 22A is slidably supported by a sliding support portion 15 provided on a rack 13 inside the pit 12 so as to be capable of reciprocating linear motion.

  In addition, the elevation unit 20A pins the upper end pivot point (upper end) 24A of the fourth link 24 to the main table 31 of the lift table 30, and the upper roller (upper end) 23A of the third link 23 to the main table 31. The lift table 30 is mounted so as to be vertically movable in the horizontal state by being connected so as to be capable of reciprocating linear movement within the lower surface of the housing.

  The lifting and lowering device 20 has a lifting and lowering drive unit 40 for lifting and lowering the lift table 30 with respect to the gantry 13. In the present embodiment, the lifting and lowering drive unit 40 is constituted by the hydraulic cylinder device 41. That is, the lifting device 20 has an intermediate portion in the longitudinal direction of the first link 21 (in this embodiment, an intermediate portion of a portion sandwiched between the lower end pivot point 21A and the crossing portion 20J) and an intermediate portion in the longitudinal direction of the fourth link 24 A hydraulic cylinder device 41 for expanding and contracting the X link mechanism 20L and the X link mechanism 20U is interposed between the parts (in this embodiment, an intermediate part of the part sandwiched between the intersection 20K and the pin connection point 20P). The base end of the cylinder 42 of the hydraulic cylinder device 41 is pin-connected to the middle of the first link 21, and the tip of the piston rod 43 of the hydraulic cylinder 41 is pin-connected to the middle of the fourth link 24.

  The elevating device 20 retracts the X link mechanisms 20L and 20U of the elevating unit 20A vertically by the contraction operation of the hydraulic cylinder device 41 and stores the X link mechanisms 20L and 20U in the pit 12, and opens the lift table 30 in the plane of the floor surface 11. It is positioned at the opening 12 A of the pit 12 where it is closed to close the opening, and the lift table 30 is set at the same lowered position as the floor surface 11 to allow the vehicle to pass through on the lift table 30. By the extension operation of the hydraulic cylinder device 26, the X link mechanisms 20L and 20U of the elevating unit 20A are extended vertically, and the lift table 30 is set at the rising position to position the pit 12 above, enabling vehicle maintenance.

  However, the lift apparatus 10 for vehicles has the descent | fall stop device 50 for preventing the unexpected descent | fall during lifting of the lift table 30 as follows (FIG. 2, FIG. 3).

  That is, the descent stop device 50 is provided with a toothed body 70 on one side of the first and second members that move relative to each other in conjunction with the elevation of the lift table 30 by the elevation drive unit 40, A nail 60 is provided which can be disengaged from the tooth 70A of the attachment 70. In the present embodiment, the lift drive unit 40 comprises a hydraulic cylinder device 41, and as shown in FIGS. 2 and 3, the cylinder 42 of the hydraulic cylinder device 41 is provided with a claw 60 as a first member. A rack-type toothed body 70 is provided on the piston rod 43 with the piston rod 43 of the hydraulic cylinder device 41 as a second member (in FIG. 1, the claw 60 and the toothed body 70 are omitted). The toothed body 70 has a long shape extending from one end side to the other end side along the vertical direction (direction along the ascending direction U to the descending direction D shown in FIG. 2). The teeth 70A are provided side by side. In each tooth 70A, the slope located on the rising direction side of the bottom of the valley is a steep slope, and the slope located on the falling direction side is a gentle slope.

  At this time, a frame-shaped support bracket 61 is fixed to the head 42A (rod guide) of the cylinder 42, and claws supported by the support bracket 61 and projected on both left and right sides orthogonal to the central axis of the cylinder 42 The left and right claws 60 are pivotally supported by the support shaft 62. The left and right claws 60 are in the form of a portal having their proximal ends connected and integrated by a connecting shoulder 60A. The pin 44 which is provided on the left and right sides orthogonal to the central axis of the piston rod 43 from the tip connecting portion 43A of the piston rod 43 and is pin-coupled to the middle portion of the fourth link 24 The connection fitting 71 provided at one end of the die gear 70 is pin-joined. The left and right toothed members 70, one end of which is connected to the end connection portion 43A of the piston rod 43 in this manner, is pivotally supported by the support bracket 61 fixed to the head 42A of the cylinder 42 via the claw support shaft 62. The right side through the right and left claws 60 is passed through, and the other end side of the portion positioned directly under each claw 60 can be inserted through and supported by the left and right hole-like slide parts 61A provided with the support bracket 61 The entire length of the other end extends in the direction along the central axis of the cylinder 42 on the left and right sides of the cylinder 42. The tip of the claw 60 faces the tooth 70A of the toothed surface of the toothed body 70 passing immediately below it, and can be meshed so as to be crimped on a steep slope located on the rising direction side with respect to the valley bottom of the tooth 70A. The side surfaces of the claws 60 when engaging with the teeth 70A of the toothed body 70 and locking the lift table 30 downward are brought into contact with the claw receiving portions 61B provided in the support bracket 61 and can be received and supported.

  In addition, the descent stop device 50 is an urging means that urges the left and right claws 60 to mesh with the teeth 70A of the left and right toothed members 70 when the lift table 30 is lifted and stopped by the lift drive unit 40. It has 80. In the present embodiment, the biasing means 80 comprises a tension coil spring 81, one end hook of the coil spring 81 is supported in tension by the hooking portion 61K provided in the support bracket 61, and the other hook of the coil spring 81 is both claws 60. The shoulder 60A is hooked and supported by a hook 60L. As a result, the biasing means 80 (coil spring 81) always exerts a tensile biasing force on the left and right claws 60, so that the teeth 70A of the toothed members 70 are adjacent to each other while the lift table 30 is lifted by the lift drive unit 40. Every time the gentle slope located on the downward direction side with respect to the valley bottom of the mountain sequentially pushes up each claw 60 and moves in the upward direction, the biasing force of the coil spring 81 moves each claw 60 from the peak to the valley of the teeth 70A. The downward movement of the lift table 30 is mechanically locked by urging the claws 60 to be securely engaged with the steep slopes located on the rising direction side with respect to the valley bottom of the teeth 70A. to enable.

  Further, the descent stopping device 50 resists the biasing force of the biasing means 80 (coil spring 81) when the lift table 30 is lowered by the lift drive unit 40, and the teeth 70A of the toothed body 70 are resisted. Means 90 for escaping the air. In the present embodiment, the release means 90 comprises an air cylinder device 91. The release means 90 pin-couples the cylinder 91 A of the air cylinder device 91 to the cylinder support portion 42 B provided on the cylinder 42 of the hydraulic cylinder device 41, and connects the pin 92 on the piston rod 91 B of the air cylinder device 91 to the connecting rod 93. One end long hole 93A is connected, and the other end of the connection rod 93 is connected to the shoulder 60A of the both claws 60 by a pin 94.

  The relief means 90 turns off the air cylinder device 91 when the lift table 30 is lifted or stopped by the lift drive unit 40, and the flange portion 91F provided at the head end surface of the cylinder 91A and the middle portion of the piston rod 91B. The piston rod 91B is positioned at the standby position (extended position) shown in FIG. 2 and FIG. 3 by the presence of the compression coil spring 91C interposed therebetween, and the pin 92 provided on the piston rod 91B is a long hole of the connecting rod 93. It is set at the longitudinal middle portion of the elongated hole in the portion 93A, and does not affect the biasing operation of the biasing means 80 on the respective claws 60,

  When the lift table 30 is lowered by the lift drive unit 40, the release means 90 turns on the air cylinder device 91 to contract the piston rod 91B from the standby position, and the connecting rod 93 is provided by the pin 92 provided on the piston rod 91B. Is released from the teeth 70A of the toothed body 70 against the biasing force of the biasing means 80 so that the lowering of the lift table 30 is permitted.

  However, when the biasing means 80 (coil spring 81) performs the biasing operation of dropping the claws 60 from the peaks to the valleys of the teeth 70A of each toothed body 70 as described above, A shock absorber 100 is provided to apply a damping force to the 80 energizing operations.

  In the present embodiment, as shown in FIG. 4, the shock absorber 100 is of a telescopic (cylinder type) loaded in the inner diameter hollow portion of the coil spring 81 constituting the biasing means 80. When the shock absorber 100 is loaded in the inner diameter hollow portion of the coil spring 81, the hooking portion 61K of the support bracket 61 to which the hook of the coil spring 81 is hooked and the hook of the coil spring 81 are pulled. It is interposed between the hooking portion 60L of the hook 60 being hooked. At this time, both ends of the shock absorber 100 are in a releasable relationship in which they are not connected to the hooking portions 60L and 61K, and the respective claws 60 run on the peaks of the teeth 70A of the respective toothed members 70 and coil springs When 81 is in the extended state, the shock absorbers 100 are separated from their hooks 60L, 61K with a gap. When the respective claws 60 fall from the peaks to the valleys of the teeth 70A of the respective toothed members 70 and the coil spring 81 contracts, the shock absorbers 100 are pinched by their hooking portions 60L, 61K.

  The shock absorber 100 may be any known telescopic shock absorber, and is, for example, a double cylinder type shown in FIG. The shock absorber 100 has a damper cylinder 101 and a piston rod 102. The damper cylinder 101 has an inner tube 101A and an outer tube 101B. An oil chamber 111 is formed inside the inner tube 101A, and an annular space between the inner tube 101A and the outer tube 101B is an oil reservoir chamber 112. The inner tube 101A The orifice 113 connecting the oil chamber 111 and the oil reservoir chamber 112 is provided. The piston rod 102 is provided with a piston 121 which is inserted into the inside of the damper cylinder 101 to define the oil chamber 111, and a head 122 is provided at a projecting end from the damper cylinder 101 to the outside. The shock absorber 100 has a return spring 103 which is incorporated in the damper cylinder 101 and compressed by the piston rod 102 (the return spring 103 is not necessarily incorporated in the damper cylinder 101). Thereby, the shock absorber 100 is loaded into the inner diameter hollow portion of the coil spring 81, and the bottom portion of the damper cylinder 101 faces the hook portion 61K of the support bracket 61, and the head 122 of the piston rod 102 is hooked by the hook 60. It is arranged to face the section 60L. Therefore, when the coil spring 81 of the biasing means 80 is contracted from a tensioned state to drop each pawl 60 from the peak to the valley of the tooth 70A in each toothed body 70, the shock absorber 100 is as described above. The throttling effect of the orifice 113 on the oil flowing from the oil chamber 111 through the orifice 113 to the oil reservoir 112 on the contraction side while being pinched and contracted by the hooking portion 61L of the support bracket 61 and the hooking portion 60L of the claw 60 A damping force based on resistance is applied to the biasing operation of the coil spring 81. Immediately thereafter, when each claw 60 falling in the valley of the tooth 70A in each toothed body 70 stretches the coil spring 81 as it passes over the next mountain from that valley, the shock absorber 100 is quickly and surely secured by the built-in return spring 103. And prepare for the next damping force applying operation without delay with respect to the next biasing operation of the coil spring 81.

  The shock absorber 100 is provided on the outer periphery of the damper cylinder 101 near the bottom with a stopper 101C projecting in the radial direction. When the shock absorber 100 is loaded into the inner diameter hollow portion of the coil spring 81, the stopper 101C is positioned closer to the hooking portion 61K of the support bracket 61 (the coil spring 81 has the claw 60 and the coil spring 81). When hooked and supported by the support bracket 61, the one end side closer to the hooking portion 61K engages with the end face of the wire in the vertical direction than the other end side closer to the hooking portion 60L) Do. Thereby, the stopper 101C prevents the shock absorber 100 from falling into the inner diameter hollow portion of the coil spring 81, and the bottom corner portion of the shock absorber 100 is bitten between the strands in the coil spring 81. To avoid.

According to this embodiment, the following effects can be obtained.
(a) When the lift table 30 is lifted by the lift drive unit 40, the gentle slope on the downward direction side with respect to the valley bottom of the adjacent mountain 70A of the toothed body 70 to be lifted pushes the claws 60 in order Each time it moves to the lower side, the biasing force of the biasing means 80 causes the pawl 60 to fall from the peak to the valley of the tooth 70A of the toothed body 70 and mesh with the tooth 70A to lower the lift table 30. It locks mechanically and prevents accidental lowering during lifting of the lift table 30. At this time, the shock absorber 100 applies a damping force to the biasing operation of the biasing means 80 which drops the claw 60 from the peak to the valley of the tooth 70A. Therefore, when the claws 60 fall in the valleys of the teeth 70A, the collision between the claws 60 and the teeth 70A generated based on the biasing force of the biasing means 80 is alleviated by the damping force of the shock absorber 100. It will prevent the generation of an offensive collision noise.

  (b) When the lift drive unit 40 includes the hydraulic cylinder device 41, the cylinder 42 as the first member and one side of the piston rod 43 as the second member (the piston rod 43 in this embodiment) are toothed By providing 70 and providing the claw 60 on the other side (the cylinder 42 in the present embodiment), the claw 60 and the toothed body 70 can be compactly equipped inside the vehicle lift device.

  (c) When the claw 60 is pivotally supported by the support shaft 61 provided on the other of the first and second members (the cylinder 42 in the present embodiment) via the claw support shaft 62, the support bracket 61 and the claw 60 The telescopic shock absorber 100 can be interposed between the claw support shaft 62 and the shoulder 60A remote from the support shaft 62.

  (d) When the biasing means 80 comprises a coil spring 81, the shock absorber 100 is loaded into the inner diameter hollow portion of the coil spring, thereby utilizing the inner diameter hollow portion of the coil spring 81 as the installation space of the shock absorber 100 The biasing means 80 can be compactly equipped inside the vehicle lift device.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like within the scope of the present invention. Included in the present invention. For example, in the present invention, a toothed body is provided on one side of the first and second members that move relative to each other in conjunction with the elevation of the lift table by the elevation drive, and the teeth of the toothed body are provided on the other side. When providing the claws that can be engaged and disengaged, the hydraulic cylinder device is the elevation drive unit in the above embodiment, but the elevation drive unit of the present invention is not limited to the hydraulic cylinder device. In the above embodiment, although the first member is the cylinder of the hydraulic cylinder device and the second member is the piston rod of the hydraulic cylinder device, the first and second members of the present invention are the lift table in the lift device It is not limited to the cylinder and the piston rod of the hydraulic cylinder device as long as the two members move relative to each other in conjunction with the vertical movement.

  Further, in the above embodiment, the toothed body is of the rack type, but the toothed body of the present invention may be of the gear type.

  Further, although the biasing means is a coil spring in the above embodiment, the biasing means of the present invention is not limited to a coil spring.

  In the above embodiment, the release means is an air cylinder device. However, the release means of the present invention is not limited to the air cylinder device, and may be a solenoid or the like.

  Although the shock absorber is telescopic in the above embodiment, the shock absorber of the present invention may be rotary. That is, when the claw is pivotally supported by the support bracket provided on the other of the first and second members via the claw support shaft, a rotary shock absorber is interposed between the support bracket and the claw support shaft. It may be dressed up.

  Further, the present invention is not limited to the X-type link lift, and can be applied to any lift such as a one-post lift, a two-post lift, and a four-post lift.

  According to the present invention, it is possible to alleviate the collision between the claws and the teeth of the toothed body in the lowering prevention device of the vehicle lift device, and to prevent the generation of an offensive collision noise at that time.

DESCRIPTION OF SYMBOLS 10 Lift device 13 Vehicle base 30 Lift table 40 Elevation drive part 41 Hydraulic cylinder device 42 Cylinder (1st member)
43 Piston rod (second member)
Reference Signs List 50 descent stopping device 60 claw 60A shoulder 61 support bracket 62 claw support shaft 70 toothed body 70A tooth 80 biasing means 81 coil spring 90 relief means 100 shock absorber

Claims (2)

The lift table is raised and lowered by the lift drive unit with respect to the gantry,
A toothed body is provided on one side of the first and second members that move relative to the lift table by the elevation drive, and is pivotally supported by a support bracket provided on the other side of the first and second members. Provide a claw that can be disengaged from
The lift table has biasing means for biasing the claws to mesh with the teeth of the toothed body when the lift table is lifted and stopped.
The biasing means is a tension coil spring which is supported in tension by the hook provided in the support bracket and is hooked and supported in the hook provided at the shoulder remote from the claw support shaft of the claw.
A lift apparatus for a vehicle, comprising a release means for releasing the teeth of the toothed body against the biasing force of the biasing means when the lift table is lowered.
It has a shock absorber which applies a damping force to the biasing operation of the coil spring which drops the claw from the peak to the valley of the toothed body of the toothed body ,
The shock absorber is telescopic loaded in the hollow portion of the inner diameter of the coil spring, and is in a releasable relationship that is not connected to the two hooks for the coil spring, and the claw is a toothed body When riding on a mountain of teeth and the coil spring is in an extended state, the coil spring is separated via a gap between them and the claw falls from the mountain of the toothed body to the valley and the coil spring A lift apparatus for a vehicle , wherein the shock absorbers are pinched by their hooking parts when they contract .   The vehicle lift device according to claim 1, wherein the elevating drive unit comprises a hydraulic cylinder device, the cylinder of the hydraulic cylinder device is a first member, and the piston rod of the hydraulic cylinder device is a second member.

Images