Chassis lifting appliance adjusting device and method

Abstract

The invention provides a chassis lifting appliance adjusting device and method, and belongs to the technical field of automobile production, the chassis lifting appliance adjusting device comprises two front supporting adjusting mechanisms arranged symmetrically and two rear supporting adjusting mechanisms arranged symmetrically, the two front supporting adjusting mechanisms are located on the front sides of the two rear supporting adjusting mechanisms, and the two rear supporting adjusting mechanisms are located on the rear sides of the two rear supporting adjusting mechanisms; the front support adjusting mechanism and the rear support adjusting mechanism respectively correspond to a front support and a rear support of the chassis lifting appliance; the position adjustment of the front support, the rear support and the rear corbel can be realized, the production requirements of different vehicle types are met, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile production, and in particular relates to a chassis hanger adjustment device and method. Background Art

[0002] The chassis line is one of the most important lines in the general assembly workshop, which is mainly used to assemble the automobile powertrain, subframe, suspension, fuel tank assembly, exhaust pipe assembly, wheels and other parts. As a carrier, the chassis line hoist is responsible for supporting and positioning the vehicle body. It is usually carried out in a suspended transportation manner, and the vehicle body is hoisted and transported by hanging on the running track and walking along the track.

[0003] At present, in an automobile OEM, in order to reduce costs, one production line often needs to produce multiple models. When producing models of the same platform, the chassis hangers are relatively compatible, but when producing models of different platforms, the chassis hangers are not easy to be compatible. It is necessary to adjust the distance between the rear support and the front support of the chassis, and replace the support block on the rear support to make the hanger adapt to different wheelbases and skirt widths.

[0004] Most of the currently used sling adjustment devices adjust the distance between the front support and the rear support by adjusting the position of the rear support arm to meet the needs of different vehicle models. However, the position adjustment of the front support and the rear support is mostly done manually by workers, which seriously affects production efficiency. Summary of the invention

[0005] In view of the defects or shortcomings in the prior art, the present invention provides a chassis hanger adjustment device and method, which can achieve position adjustment of the front support, rear support and rear support arm, meet the production requirements of different vehicle models, and improve production efficiency.

[0006] To achieve the above object, the present invention adopts the following technical solution: In a first aspect, an embodiment of the present invention provides a chassis sling adjustment device, comprising two symmetrically arranged front support adjustment mechanisms and two symmetrically arranged rear support adjustment mechanisms, the two front support adjustment mechanisms are located in front of the two rear support adjustment mechanisms, and the front support adjustment mechanisms and the rear support adjustment mechanisms correspond to the front support and the rear support of the chassis sling, respectively; The front support adjustment mechanism and the rear support adjustment mechanism have the same structure, wherein the front support adjustment mechanism includes a front support adjustment base, a front support adjustment slide is slidably connected to the front support adjustment base, a fixing rod is slidably connected to the front support adjustment slide, the moving directions of the fixing rod and the front support adjustment slide are perpendicular to each other, one end of the fixing rod is connected to a clamping plate through a fixing plate, a U-shaped clamping groove is provided on the clamping plate, and the U-shaped clamping groove is adapted to the front support adjustment pin of the chassis hanger.

[0007] Furthermore, a first slide rail is arranged parallel to the upper surface of the front support adjustment base, a first screw rod is arranged between the two first slide rails, two ends of the first screw rod are fixed to the front support adjustment base through bearing seats, a first pneumatic motor is also arranged on the upper surface of the front support adjustment base, and an output shaft of the first pneumatic motor is fixedly connected to the first screw rod through a coupling.

[0008] Furthermore, first sliders are provided at both ends of the bottom surface of the front support adjustment slide, the two first sliders are slidably connected to the two first slide rails respectively, a screw seat is threadedly connected to the first screw rod, and the screw seat is fixedly connected to the middle part of the bottom surface of the front support adjustment slide.

[0009] Furthermore, a second slide rail is provided on the upper surface of the front support adjustment slide, the extension direction of the second slide rail is perpendicular to the extension direction of the first slide rail, a second slider is slidably connected to the second slide rail, the fixed rod is fixed on the second slider, and a first cylinder is also provided on the front support adjustment slide, and the telescopic end of the first cylinder is connected to the fixed rod through a connecting rod.

[0010] Furthermore, it also includes two symmetrically arranged positioning clamping mechanisms, the positioning clamping mechanism includes a fixed seat, a positioning cylinder is arranged on the top of the fixed seat, the telescopic shaft of the positioning cylinder passes through the top plate of the fixed seat and extends to the inside of the fixed seat, a positioning rod is fixedly connected to the telescopic shaft of the positioning cylinder, the positioning rod is horizontally arranged, and one end of the positioning rod away from the telescopic shaft of the positioning cylinder is fixedly connected to a positioning pin through a positioning plate, and the positioning pin is adapted to the positioning hole on the chassis hanger.

[0011] Furthermore, it also includes two symmetrically arranged rear support arm adjustment mechanisms, which are located above the two rear support adjustment mechanisms. The rear support arm adjustment mechanism includes a support frame, a first guide rail is arranged parallel to the upper surface of the support frame, a first lead screw is arranged between the two first guide rails, both ends of the first lead screw are fixed to the support frame through bearing seats, and a second pneumatic motor is also arranged on the upper surface of the support frame, and the output shaft of the second pneumatic motor is fixedly connected to the first lead screw through a coupling.

[0012] Furthermore, a sliding frame is arranged above the support frame, and multiple first sliding blocks are symmetrically arranged on both sides of the bottom surface of the sliding frame. The multiple first sliding blocks are slidingly connected to two first screws respectively. A screw seat is threadedly connected to the first screw, and the screw seat is fixedly connected to the middle of the bottom surface of the sliding frame.

[0013] Furthermore, a connecting frame is arranged above the sliding frame, and two second guide rails are arranged in parallel on the upper surface of the sliding frame, and the second guide rails are arranged perpendicular to the first guide rails. A plurality of second sliding blocks are arranged on both sides of the lower surface of the connecting frame, and the plurality of second sliding blocks are respectively slidably connected to the two second guide rails. A third cylinder is also arranged on the upper surface of the sliding frame, and the output end of the second guide rail is fixedly connected to the connecting frame.

[0014] Furthermore, a plurality of rear support arm fixing devices are arranged on the side of the connecting frame away from the third cylinder, and the plurality of rear support arm fixing devices are arranged vertically side by side. The rear support arm fixing devices include two symmetrically arranged clamping plates, and the clamping plates are L-shaped. The distance between the two clamping plates is equal to the width of the rear support arm. A bracket is arranged on the upper surface of the connecting frame, and an unlocking unit is arranged on the top of the bracket.

[0015] In a second aspect, an embodiment of the present invention further provides a method for adjusting a chassis low sling, using a chassis sling adjustment device as described above, comprising the following steps: After the chassis wire frame assembly is assembled, the chassis hoist is lifted into the air by the elevator and enters the chassis hoist adjustment device. The positioning clamping mechanism operates to insert the positioning pin into the chassis hoist positioning hole. The front support adjustment mechanism and the rear support adjustment mechanism operate to insert the U-shaped card slot on the card plate into the chassis hoist adjustment pin, and the front support and the rear support are adjusted to the set position. The rear support arm adjustment device operates to fix the rear support arm of the chassis hoist through the rear support arm fixing device. The unlocking unit unlocks the mechanical lock of the rear support arm, and the rear support arm adjustment mechanism adjusts the rear support arm to the set position. After the chassis hoist is adjusted into place, the positioning clamping mechanism opens, and the chassis hoist enters the elevator. The elevator drives the chassis hoist down to the vehicle body to lift the vehicle body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can realize the position adjustment of the front support and the rear support of the chassis sling by setting the front support adjustment mechanism and the rear support adjustment mechanism, thereby avoiding manual adjustment and improving the adjustment efficiency of the chassis sling.

[0017] 2. The present invention can adjust the positions of the front support, rear support and rear supporting arm of the chassis hoist, is compatible with a variety of vehicle models, and meets the hoisting requirements of different vehicle models, thereby improving assembly efficiency and reducing investment and manufacturing costs.

[0018] 3. The present invention can realize rapid positioning of the chassis hanger by providing a positioning clamping mechanism, and at the same time prevent the chassis hanger from moving during the adjustment process, thereby affecting the accuracy of the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the adjustment device in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a chassis hanger mechanism in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the front support adjustment mechanism in Embodiment 1 of the present invention; Figure 4 A diagram showing the connection state of the front support and the front support adjustment mechanism in the first embodiment of the present invention; Figure 5 This is a structural diagram of a positioning and clamping mechanism in Embodiment 1 of the present invention; Figure 6 This is a structural diagram of the rear support arm adjustment mechanism in the first embodiment of the present invention; Figure 7 This is a diagram showing the connection state of the rear support arm and the rear support arm adjustment mechanism in the first embodiment of the present invention; Figure 8 This is a structural diagram of the rear support arm locking mechanism in the first embodiment of the present invention; Fig. 9 This is a position relationship diagram of the lift and the adjustment device in the second embodiment of the present invention; Fig.10 This is a diagram of the chassis sling after adjustment in the first embodiment of the present invention; Among them, 1. front support adjustment mechanism; 101, front support adjustment base; 102, first slide rail; 103, first screw rod; 104, first pneumatic motor; 105, front support adjustment slide; 106, second slide rail; 107, fixing rod; 108, first cylinder; 109, clamping plate; 110, second cylinder; 2. positioning clamping mechanism; 201, fixing seat; 202, positioning cylinder; 203, positioning rod; 204, positioning plate; 205, positioning pin; 3. rear support adjustment mechanism Structure; 4. Rear support arm adjustment mechanism; 401. Support frame; 402. First guide rail; 403. First screw; 404. Second pneumatic motor; 405. Sliding frame; 406. Connecting frame; 407. Second guide rail; 408. Third cylinder; 409. Clamping plate; 410. Bracket; 411. Unlocking unit; 5. Chassis hanger; 501. Front support; 502. Rear support; 503. Rear support arm; 504. Front support adjustment pin; 505. Rear support arm locking mechanism; 6. Lift. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] The chassis sling 5 of the present invention is as follows Figure 2 and Fig.10As shown, it includes a front support 501, a rear support 502 and a rear supporting arm 503, wherein the front support 501 is located at the bottom end of the front supporting arm, and the rear support 502 is located at the bottom end of the rear supporting arm 503. The front support 501 and the rear support 502 can both be adjusted in the X direction, and the rear supporting arm 503 can be adjusted in the Y direction, so as to meet the hoisting requirements of chassis of different sizes of vehicles.

[0022] Embodiment 1 A typical implementation of the present invention is as follows Figure 1 As shown, a chassis sling adjustment device includes a front support adjustment mechanism 1, a positioning clamping mechanism 2, a rear support adjustment mechanism 3 and a rear support arm adjustment mechanism 4, two front support adjustment mechanisms 1 are provided, and the two front support adjustment mechanisms 1 are symmetrically arranged, two rear support adjustment mechanisms 3 are provided, and the two rear support adjustment mechanisms 3 are symmetrically arranged, the two front support adjustment mechanisms 1 are arranged in front of the two rear support adjustment mechanisms 3, the two front support adjustment mechanisms 1 are respectively arranged corresponding to the two front supports 501 of the chassis sling 5, and are used to adjust the positions of the two front supports 501 of the chassis sling 5, and the two rear support adjustment mechanisms 3 are respectively arranged corresponding to the two rear supports 502 of the chassis sling 5, and are used to adjust the positions of the two rear supports 502 of the chassis sling 5.

[0023] Two positioning clamping mechanisms 2 are provided, and the two positioning clamping mechanisms 2 are respectively located on one side of the two front support adjustment mechanisms 1 and are symmetrically arranged. The positioning clamping mechanisms 2 are used to position the chassis hanger 5 to prevent the chassis hanger 5 from moving during adjustment.

[0024] There are two rear supporting arm adjustment mechanisms 4 symmetrically arranged above the two rear support adjustment mechanisms 3 . The rear supporting arm adjustment mechanisms 4 correspond to the two rear supporting arms 503 of the chassis hanger 5 and can adjust the positions of the rear supporting arms 503 .

[0025] When the chassis is assembled, the chassis hoist 5 is separated from the assembly AGV and raised to the adjustment position by the elevator 6. The chassis hoist 5 is adjusted by the adjustment device provided by the present invention. The positions of the front support 501, the rear support 502 and the rear supporting arm 503 of the hoist are adjusted according to the requirements of the vehicle model to meet the requirements of the hoist switching and adjustment. After the hoist is adjusted, it is lowered into the waiting area by the elevator 6. After the vehicle body is in place, the assembly AGV lifts the vehicle, and the hoist lifts the frame position for transportation.

[0026] The present invention can adjust the positions of the front support 501, the rear support 502 and the rear support arm 503 of the sling for different vehicle models to meet the requirements of different vehicle models, thereby improving assembly efficiency and reducing investment and manufacturing costs.

[0027] The front support adjustment mechanism 1 has the same structure as the rear support adjustment mechanism 3. This embodiment is described by taking the front support adjustment mechanism 1 as an example. Figure 3As shown, the front support adjustment mechanism 1 includes a front support adjustment base 101, a first slide rail 102 is arranged in parallel on the upper surface of the front support adjustment base 101, a first screw rod 103 is arranged between the two first slide rails 102, the first screw rod 103 is arranged parallel to the two first slide rails 102, both ends of the first screw rod 103 are fixed to the front support adjustment base 101 through bearing seats, and a first pneumatic motor 104 is also arranged on the upper surface of the front support adjustment base 101, and the output shaft of the first pneumatic motor 104 is fixedly connected to the first screw rod 103 through a coupling, so that the first screw rod 103 is driven to rotate by the first pneumatic motor 104.

[0028] A front support adjustment slide 105 is arranged above the front support adjustment base 101, and first sliding blocks are arranged at both ends of the bottom surface of the front support adjustment slide 105. The two first sliding blocks are respectively slidably connected to the two first slide rails 102, so that the front support adjustment slide 105 can slide along the length direction of the first slide rails 102. A screw seat is threadedly connected to the first screw rod 103, and the screw seat is fixedly connected to the middle part of the bottom surface of the front support adjustment slide 105. When the first screw rod 103 rotates, the front support adjustment slide 105 can be driven to move through the screw seat, thereby utilizing the first pneumatic motor 104 to drive the front support adjustment slide 105 to move.

[0029] A second slide rail 106 is arranged on the upper surface of the front support adjustment slide 105, and the extension direction of the second slide rail 106 is perpendicular to the extension direction of the first slide rail 102. A second slider is slidably connected to the second slide rail 106, and a fixing rod 107 is fixedly connected to the top of the second slider. A first cylinder 108 is also arranged on the front support adjustment slide 105, and the first cylinder 108 is located on one side of the second slide rail 106 and is arranged parallel to the second slide rail 106. The telescopic end of the first cylinder 108 is connected to the fixing rod 107 through a connecting rod, and the fixing rod 107 is driven by the first cylinder 108 to move along the length direction of the second slide rail 106.

[0030] A fixing plate is provided at one end of the fixing rod 107, and the fixing plate is arranged vertically. A second cylinder 110 is fixedly connected to the side of the fixing plate away from the fixing rod 107. A clamping plate 109 is fixedly connected to the output shaft of the second cylinder 110. The clamping plate 109 is placed horizontally. The second cylinder 110 can drive the clamping plate 109 to move in the vertical direction. A U-shaped clamping groove is provided at one end of the clamping plate 109 away from the fixing plate. The U-shaped clamping groove is adapted to the front support adjustment pin 504 of the chassis hanger 5, so that the clamping plate 109 can be engaged with the front support adjustment pin 504, so that the clamping plate 109 can be used to drive the front support adjustment pin 504 to move, unlock the front support 501, and adjust the position of the front support 501.

[0031] When using, Figure 4As shown, the front support adjustment mechanism 1 adjusts the position of the card plate 109 through the first pneumatic motor 104 and the first cylinder 108, so that the card plate 109 is inserted into the bottom of the front support adjustment pin 504 of the chassis hanger 5 through the U-shaped card slot, and the card plate 109 is driven to move upward by the second cylinder 110, thereby pulling out the front support adjustment pin 504 upward to unlock the front support 501, and then the first pneumatic motor 104 and the first cylinder 108 are used to drive the front support 501 to move, so as to adjust the position of the front support 501 to meet the needs of different vehicle models. After the adjustment is completed, the card plate 109 is separated from the front support adjustment pin 504, so that the front support adjustment pin 504 is reset, and the front support adjustment pin 504 positions the front support 501 to prevent the front support 501 from moving.

[0032] like Figure 5 As shown, the positioning clamping mechanism 2 includes a fixed seat 201, which is hollow inside and has an opening on one side. A positioning cylinder 202 is arranged on the top of the fixed seat 201, and the telescopic axis of the positioning cylinder 202 passes through the top plate of the fixed seat 201 and extends into the inside of the fixed seat 201. A positioning rod 203 is fixedly connected to the telescopic axis of the positioning cylinder 202. The positioning rod 203 is horizontally arranged, and the positioning rod 203 passes through the opening and extends toward one side of the chassis hanger 5. The end of the positioning rod 203 away from the telescopic axis of the positioning cylinder 202 is fixedly connected to a positioning plate 204. A positioning pin 205 is arranged in the middle of the upper surface of the positioning plate 204. The positioning pin 205 is adapted to the positioning hole on the chassis hanger 5. The positioning cylinder 202 is used to drive the positioning pin 205 to be inserted into the positioning hole. The positioning hole is opened on the end surface of the bottom end of the front support arm, so as to fix the chassis hanger 5 to avoid the chassis hanger 5 from moving during adjustment, which affects the accuracy of the adjustment.

[0033] like Figure 6 As shown, the rear support arm adjustment mechanism 4 includes a support frame 401, and the support frame 401 is n-shaped, so that the rear support adjustment mechanism 3 is conveniently placed under the rear support arm adjustment mechanism 4, and a first guide rail 402 is arranged in parallel on the upper surface of the support frame 401, and a first screw 403 is arranged between the two first guide rails 402, and the first screw 403 is arranged parallel to the two first guide rails 402. Both ends of the first screw 403 are fixed to the support frame 401 through bearing seats, and a second pneumatic motor 404 is also arranged on the upper surface of the support frame 401, and the output shaft of the second pneumatic motor 404 is fixedly connected to the first screw 403 through a coupling, so that the first screw 403 is driven to rotate by the second pneumatic motor 404.

[0034] A sliding frame 405 is arranged above the support frame 401, and a plurality of first sliding blocks are symmetrically arranged on both sides of the bottom surface of the sliding frame 405. The plurality of first sliding blocks are respectively slidably connected to the two first lead screws 403, so that the sliding frame 405 can slide on the support frame 401. A lead screw seat is threadedly connected to the first lead screw 403, and the lead screw seat is fixedly connected to the middle part of the bottom surface of the sliding frame 405. When the first lead screw 403 rotates, the sliding frame 405 can be driven to move through the lead screw seat, thereby utilizing the second pneumatic motor 404 to drive the sliding frame 405 to move.

[0035] A connecting frame 406 is arranged above the sliding frame 405, and the connecting frame 406 is slidably connected to the sliding frame 405. Specifically, two second guide rails 407 are arranged in parallel on the upper surface of the sliding frame 405, and the second guide rails 407 are arranged perpendicular to the first guide rails 402. A plurality of second sliding blocks are arranged on both sides of the lower surface of the connecting frame 406, and the plurality of second sliding blocks are respectively slidably connected to the two second guide rails 407, thereby realizing the sliding of the connecting frame 406 on the sliding frame 405.

[0036] A third cylinder 408 is also provided on the upper surface of the sliding frame 405. The third cylinder 408 is located at one end of the second guide rail 407, and the third cylinder 408 is arranged parallel to the second guide rail 407. The output end of the second guide rail 407 is fixedly connected to the connecting frame 406, so that the connecting frame 406 is driven to move by the third cylinder 408. A plurality of rear support arm fixing devices are provided on the side of the connecting frame 406 away from the third cylinder 408. The plurality of rear support arm fixing devices are vertically arranged side by side. The rear support arm fixing devices include two symmetrically arranged clamping plates 409. The clamping plates 409 are L-shaped. The distance between the two clamping plates 409 is equal to the width of the rear support arm, so that the rear support arm can be placed between the two clamping plates 409 to fix the rear support arm.

[0037] A bracket 410 is provided on the upper surface of the connecting frame 406, and an unlocking unit is provided on the top of the bracket 410. The unlocking unit includes a push plate 411, and the push plate 411 is fixedly connected to the bracket 410 through a support rod. The unlocking unit is used to unlock the mechanical lock of the rear support arm 503, so as to facilitate the adjustment of the position of the rear support arm 503.

[0038] When using, Figure 7 and Figure 8As shown, the position of the rear support arm fixing device is adjusted by the second pneumatic motor 404 and the third cylinder 408, so that the rear support arm 503 is placed between the two clamping plates 409 to fix the rear support arm 503. At this time, the unlocking unit is in contact with the rear support arm locking mechanism 505, and the push plate 411 is used to push the rear support arm locking mechanism 505, thereby unlocking the mechanical lock of the rear support arm 503, and the second pneumatic motor 404 and the third cylinder 408 are used to adjust the rear support arm 503 to the required position to meet the needs of different vehicle models. After the adjustment is completed, the push plate 411 is away from the rear support arm locking mechanism 505, and the rear support arm locking mechanism 505 is reset under the action of the reset spring, jamming the rear support arm 503 to prevent the rear support arm 503 from moving.

[0039] Embodiment 2 This embodiment provides a chassis sling adjustment method, using a chassis sling adjustment device as described in the first embodiment, comprising the following steps: like Fig. 9 As shown, after the chassis wire frame assembly is assembled, the chassis hoist is lifted into the air by a lift and enters the chassis hoist adjustment device. The positioning clamping mechanism operates to insert the positioning pin into the chassis hoist positioning hole to ensure the position accuracy of the chassis hoist in the adjustment device. The chassis hoist adjustment device adjusts the front and rear supports and the rear support arm positions according to the vehicle configuration information.

[0040] The front support adjustment mechanism and the rear support adjustment mechanism are in operation, the U-shaped slot on the adjustment plate is inserted into the chassis hanger adjustment pin, and the front support and the rear support are adjusted to the set position, the rear support arm adjustment device is in operation, the rear support arm fixing device is adjusted to be inserted into the rear support arm of the chassis hanger, the unlocking unit unlocks the mechanical lock of the rear support arm, and the rear support arm adjustment mechanism adjusts the rear support arm to the set position.

[0041] After the chassis hoist is adjusted into place, the positioning clamping mechanism of the chassis hoist automatically opens, and the chassis hoist enters the elevator. The elevator drives the chassis hoist down to the vehicle body to lift the vehicle body.

[0042] The present invention can adjust the positions of the front support, rear support and rear supporting arm of the chassis hoist, is compatible with various vehicle models, and meets the hoisting requirements of different vehicle models, thereby improving assembly efficiency and reducing investment and manufacturing costs.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A chassis hanger adjustment device, characterized in that: It includes two symmetrically arranged front support adjustment mechanisms and two symmetrically arranged rear support adjustment mechanisms, the two front support adjustment mechanisms are located in front of the two rear support adjustment mechanisms, and the front support adjustment mechanisms and the rear support adjustment mechanisms correspond to the front support and the rear support of the chassis hanger respectively; The front support adjustment mechanism and the rear support adjustment mechanism have the same structure, wherein the front support adjustment mechanism includes a front support adjustment base, a front support adjustment slide is slidably connected to the front support adjustment base, a fixing rod is slidably connected to the front support adjustment slide, the moving directions of the fixing rod and the front support adjustment slide are perpendicular to each other, one end of the fixing rod is connected to a clamping plate through a fixing plate, a U-shaped clamping groove is provided on the clamping plate, and the U-shaped clamping groove is adapted to the front support adjustment pin of the chassis hanger.

2. A chassis sling adjustment device as claimed in claim 1, characterized in that: A first slide rail is arranged parallel to the upper surface of the front support adjustment base, a first screw rod is arranged between the two first slide rails, two ends of the first screw rod are fixed to the front support adjustment base through bearing seats, a first pneumatic motor is also arranged on the upper surface of the front support adjustment base, and an output shaft of the first pneumatic motor is fixedly connected to the first screw rod through a coupling.

3. A chassis sling adjustment device as claimed in claim 2, characterized in that: The two ends of the bottom surface of the front support adjustment slide are provided with first sliding blocks, the two first sliding blocks are respectively slidably connected to the two first slide rails, the first screw rod is threadedly connected with a screw rod seat, and the screw rod seat is fixedly connected to the middle part of the bottom surface of the front support adjustment slide.

4. A chassis sling adjustment device as claimed in claim 3, characterized in that: A second slide rail is arranged on the upper surface of the front support adjustment slide, and the extension direction of the second slide rail is perpendicular to the extension direction of the first slide rail. A second slider is slidably connected to the second slide rail, and the fixed rod is fixed on the second slider. A first cylinder is also arranged on the front support adjustment slide, and the telescopic end of the first cylinder is connected to the fixed rod through a connecting rod.

5. The chassis sling adjustment device according to claim 1, characterized in that: It also includes two symmetrically arranged positioning and clamping mechanisms, the positioning and clamping mechanisms include a fixed seat, a positioning cylinder is arranged on the top of the fixed seat, the telescopic shaft of the positioning cylinder passes through the top plate of the fixed seat and extends to the inside of the fixed seat, a positioning rod is fixedly connected to the telescopic shaft of the positioning cylinder, the positioning rod is horizontally arranged, and one end of the positioning rod away from the telescopic shaft of the positioning cylinder is fixedly connected to a positioning pin through a positioning plate, and the positioning pin is adapted to the positioning hole on the chassis hanger.

6. The chassis sling adjustment device according to claim 1, characterized in that: It also includes two symmetrically arranged rear support arm adjustment mechanisms, which are located above the two rear support adjustment mechanisms. The rear support arm adjustment mechanism includes a support frame, a first guide rail is arranged parallel to the upper surface of the support frame, a first lead screw is arranged between the two first guide rails, both ends of the first lead screw are fixed to the support frame through bearing seats, a second pneumatic motor is also arranged on the upper surface of the support frame, and the output shaft of the second pneumatic motor is fixedly connected to the first lead screw through a coupling.

7. A chassis sling adjustment device as claimed in claim 6, characterized in that: A sliding frame is arranged above the support frame, and a plurality of first sliding blocks are symmetrically arranged on both sides of the bottom surface of the sliding frame. The plurality of first sliding blocks are slidingly connected to two first lead screws respectively. A lead screw seat is threadedly connected to the first lead screw, and the lead screw seat is fixedly connected to the middle part of the bottom surface of the sliding frame.

8. A chassis sling adjustment device as claimed in claim 7, characterized in that: A connecting frame is arranged above the sliding frame, two second guide rails are arranged in parallel on the upper surface of the sliding frame, and the second guide rails are arranged perpendicular to the first guide rails. A plurality of second sliding blocks are arranged on both sides of the lower surface of the connecting frame, and the plurality of second sliding blocks are respectively slidably connected to the two second guide rails. A third cylinder is also arranged on the upper surface of the sliding frame, and the output end of the second guide rail is fixedly connected to the connecting frame.

9. A chassis sling adjustment device as claimed in claim 8, characterized in that: A plurality of rear support arm fixing devices are arranged on the side of the connecting frame away from the third cylinder, and the plurality of rear support arm fixing devices are arranged vertically side by side. The rear support arm fixing devices include two symmetrically arranged clamping plates, and the clamping plates are L-shaped. The distance between the two clamping plates is equal to the width of the rear support arm. A bracket is arranged on the upper surface of the connecting frame, and an unlocking unit is arranged on the top of the bracket.

10. A chassis sling adjustment method, using a chassis sling adjustment device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: After the chassis wire frame assembly is assembled, the chassis hoist is lifted into the air by the elevator and enters the chassis hoist adjustment device. The positioning clamping mechanism operates to insert the positioning pin into the chassis hoist positioning hole. The front support adjustment mechanism and the rear support adjustment mechanism operate to insert the U-shaped card slot on the card plate into the chassis hoist adjustment pin, and the front support and the rear support are adjusted to the set position. The rear support arm adjustment device operates to fix the rear support arm of the chassis hoist through the rear support arm fixing device. The unlocking unit unlocks the mechanical lock of the rear support arm, and the rear support arm adjustment mechanism adjusts the rear support arm to the set position. After the chassis hoist is adjusted into place, the positioning clamping mechanism opens, and the chassis hoist enters the elevator. The elevator drives the chassis hoist down to the vehicle body to lift the vehicle body.

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