An electric vehicle battery box replacement device

Abstract

The present invention provides an electric vehicle battery box replacement device, which relates to the technical field of electric vehicle battery box replacement. The electric vehicle battery box replacement device includes a fixing mechanism, on the surface of which a supporting mechanism is slidably arranged. At the four corners of the outside of the fixing mechanism, a lifting mechanism is fixedly arranged. On one side of the lifting mechanism, a recycling mechanism is fixedly arranged. On the other side of the lifting mechanism, a feeding mechanism is fixedly arranged. The supporting mechanism includes a moving plate, at the four corners of which first linear motors are fixedly arranged. The four first linear motors are grouped in pairs, and two protective plates are fixedly arranged at both ends of each pair. At the middle position of the opposite surfaces of the four protective plates in pairs, cleaning brushes are fixedly arranged. At the four corners of the bottom surface of the moving plate, inclined support plates are fixedly arranged. By providing the feeding mechanism and the recycling mechanism, the operation of relevant operators for handling is avoided, the overall applicable range of the device is increased, and the overall practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle battery box replacement, and specifically to an electric vehicle battery box replacement device. Background Art

[0002] The existing patent (Publication No.: CN115465150A) discloses "an electric vehicle battery box replacement device, including a lifting mechanism, which is connected to the corresponding battery box pushing and pulling mechanism through the transverse movement mechanisms arranged on both sides, driving the battery box pushing and pulling mechanism to move synchronously or asynchronously in the vertical direction; the transverse movement mechanisms, with at least two groups and arranged on both sides of the lifting mechanism, are respectively connected to the battery box pushing and pulling mechanism and drive the corresponding battery box pushing and pulling mechanism to move in the horizontal direction; the traveling mechanism, movably connected to the bottom of the lifting mechanism, drives the lifting mechanism to rotate and drives the lifting mechanism, the transverse movement mechanism and the battery box pushing and pulling mechanism to move to the set position; the battery box pushing and pulling mechanism, connected to one end of the transverse movement mechanism, realizes the detachable connection with the battery box through the electromagnet arranged at the distal end and the matching suction cup. It solves the problem that the labor intensity of workers is relatively large during operations such as electric vehicle battery box replacement and maintenance".

[0003] The inventor found the following problems in the process of implementing this application: When the existing electric vehicle battery box replacement device is in use, it usually only has the function of supporting the battery box of the vehicle. During battery replacement, relevant operators still need to remove the replaced old battery box and carry the new battery box into place for replacement. The overall use consumes a large amount of manpower and has poor practicability. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an electric vehicle battery box replacement device, which solves the problems of large manpower consumption and poor practicability when the existing electric vehicle battery box replacement device is in use.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An electric vehicle battery box replacement device, including a fixing mechanism, a supporting mechanism is slidably arranged on the surface of the fixing mechanism, lifting mechanisms are fixedly arranged at the four corners on the outside of the fixing mechanism, a recycling mechanism is fixedly arranged on one side of the lifting mechanism, and a feeding mechanism is fixedly arranged on the other side of the lifting mechanism;

[0006] The supporting mechanism includes a moving plate, first linear motors are fixedly arranged at the four corners of the moving plate, two protective plates are fixedly arranged at both ends of every two of the four first linear motors in a group, cleaning brushes are fixedly arranged at the middle positions of the opposite surfaces of every two of the four protective plates in a group, inclined support plates are fixedly arranged at the four corners of the bottom surface of the moving plate, and telescopic cylinders are fixedly arranged at the four corners of the upper surface of the moving plate.

[0007] Preferably, a bottom plate is fixedly arranged at the upper ends of the four telescopic cylinders. Two first guide plates are slidably arranged on the upper surface of the bottom plate. Support frames are fixedly arranged at the four corners of the upper surface of the bottom plate. A support plate is fixedly arranged at the upper ends of the four support frames.

[0008] Preferably, the lifting mechanism comprises four bases. Lifting columns are fixedly arranged at the upper ends of the four bases. Motor boxes are fixedly arranged at the upper ends of the four lifting columns. Threaded rods are fixedly arranged inside the four motor boxes. Servo motors are fixedly arranged at one ends of the four threaded rods. Lifting grooves are formed on the surfaces of the four lifting columns.

[0009] Preferably, lifting blocks are slidably arranged on the surfaces of the four threaded rods. Placing plates are fixedly arranged at one ends of the four lifting blocks. Extension plates are slidably arranged inside the two placing plates. Guardrails are fixedly arranged between the four lifting columns.

[0010] Preferably, the fixing mechanism comprises a fixing bracket. A limiting plate is fixedly arranged at one end of the fixing bracket. A second guide plate is fixedly arranged at the other end of the fixing bracket. First sliding rails are fixedly arranged on both sides inside the fixing bracket.

[0011] Preferably, the recycling mechanism comprises two first support columns and four second support columns. A plurality of first partition plates are fixedly arranged on one side of the two first support columns. A first top plate is fixedly arranged at the upper ends of the two first support columns and the four second support columns. Second sliding rails are fixedly arranged on the opposite side surfaces of the four second support columns.

[0012] Preferably, second linear motors are slidably arranged on the surfaces of the four second sliding rails. Recycling plates are fixedly arranged on one side of the four second linear motors. A first baffle is fixedly arranged on one side of the recycling plate. Two first multi-stage telescopic rods are fixedly arranged on one side of the first baffle. First clamping jaws are fixedly arranged at one ends of the two first multi-stage telescopic rods. A second baffle is fixedly arranged on the other side of the first baffle. Two second multi-stage telescopic rods are fixedly arranged on the surface of the second baffle. First pushing plates are fixedly arranged at one ends of the two second multi-stage telescopic rods.

[0013] Preferably, the feeding mechanism comprises two third support columns and four fourth support columns. A plurality of second partition plates are fixedly arranged on one side of the two third support columns. A second top plate is fixedly arranged at the upper ends of the two third support columns and the four fourth support columns. Third sliding rails are fixedly arranged on the opposite side surfaces of the four fourth support columns.

[0014] Preferably, third linear motors are slidably arranged on the surfaces of the four third slide rails. Upper feeding plates are fixedly arranged on one side surfaces of the four third linear motors. A fourth baffle is fixedly arranged on one side of the upper feeding plate. Two fourth multi-stage telescopic rods are fixedly arranged on the surface of the fourth baffle. Second clamping jaws are fixedly arranged at one ends of the two fourth multi-stage telescopic rods. A third baffle is fixedly arranged on the other side of the upper surface of the upper feeding plate. Two third multi-stage telescopic rods are fixedly arranged on one side of the third baffle. Second pushing plates are fixedly arranged at one ends of the two third multi-stage telescopic rods.

[0015] Working principle: When the device is in use, the user can first drive the vehicle onto the surface of the placing plate through the second guiding plate. After the vehicle is completely driven onto it, the servo motor is started to drive the threaded rod to rotate, lifting the whole vehicle to a high place. After the vehicle is lifted, the user can control the first linear motor to move, moving the supporting mechanism as a whole under the battery box, control the telescopic cylinder to extend, raising the supporting plate to support the battery box. The user can disassemble the relevant circuits of the battery box and loosen the fixed bolts to remove the battery box. After the battery box is removed, the first linear motor drives the supporting mechanism as a whole to move to the front end of the recycling mechanism. The second linear motor drives the recycling plate to move to a suitable height, slides out the two first guiding plates, extends the two first multi-stage telescopic rods, clamps the old battery box with the first clamping jaws, moves the old battery box to the surface of the recycling plate. The second linear motor drives the recycling plate to move to a suitable position, and through the extension of the second multi-stage telescopic rod combined with the first pushing plate, the waste battery box is pushed to the first partition plate to complete the recycling of the old battery box.

[0016] Secondly, the third linear motor drives the upper feeding plate to move up and down. After moving to a suitable position, the fourth multi-stage telescopic rod extends, and the new battery box on the surface of the second partition plate is clamped and moved to the surface of the upper feeding plate by the second clamping jaws. The third linear motor drives the upper feeding plate to move to a suitable position, and the third multi-stage telescopic rod combined with the second pushing plate moves the new battery box to the surface of the supporting mechanism. The two first guiding plates are retracted, and the supporting mechanism is driven back under the vehicle by the first linear motor. The staff fixes the wiring of the new battery box to complete the battery box replacement operation.

[0017] The present invention provides an electric vehicle battery box replacement device. It has the following beneficial effects:

[0018] 1. The present invention provides an electric vehicle battery box replacement device. Compared with the existing electric vehicle battery box replacement devices, this electric vehicle battery box replacement device is provided with a feeding mechanism and a recycling mechanism. When in use, the user can support the replaced battery box through the support mechanism and move it to one end of the recycling mechanism through the fixing mechanism. The replaced battery box is moved to the surface of the first partition plate by the first jaw in combination with the first push plate. At the same time, the feeding mechanism can push the new battery box on the surface of the second partition plate to the surface of the support mechanism through the second jaw in combination with the second push plate, move it under the electric vehicle through the support mechanism, and be replaced by relevant operators, avoiding the operation of relevant operators for carrying, increasing the overall applicable range of the device, and enhancing the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the first axonometric schematic diagram of the present invention;

[0020] Figure 2 is the second axonometric schematic diagram of the present invention;

[0021] Figure 3 is the first developed axonometric schematic diagram of the present invention;

[0022] Figure 4 is the second developed axonometric schematic diagram of the present invention;

[0023] Figure 5 is the axonometric schematic diagram of the support mechanism of the present invention;

[0024] Figure 6 is the axonometric schematic diagram of the lifting mechanism of the present invention;

[0025] Figure 7 is the sectional view schematic diagram of the lifting mechanism of the present invention;

[0026] Figure 8 is the axonometric schematic diagram of the fixing mechanism of the present invention;

[0027] Figure 9 is the axonometric schematic diagram of the recycling mechanism of the present invention;

[0028] Figure 10 is the axonometric schematic diagram of the feeding mechanism of the present invention.

[0029] Among them, 1. Support mechanism; 2. Lifting mechanism; 3. Fixing mechanism; 4. Recycling mechanism; 5. Loading mechanism; 101. Support plate; 102. Support frame; 103. First guide plate; 104. Bottom plate; 105. Telescopic cylinder; 106. Moving plate; 107. Diagonal support plate; 108. First linear motor; 109. Protection plate; 110. Cleaning brush; 201. Guardrail; 202. Motor box; 203. Lifting column; 204. Lifting groove; 205. Lifting block; 206. Placing plate; 207. Extension plate; 208. Servo motor; 209. Threaded rod; 210. Base; 301. Limiting plate; 302. Fixed bracket; 303. Second guide plate; 304. First slide rail; 401. First top plate; 402. First partition plate; 403. First support column; 404. Second linear motor; 405. Second support column; 406. Second slide rail; 407. First baffle; 408. First multi-stage telescopic rod; 409. First jaw; 410. Recycling plate; 411. Second baffle; 412. First push plate; 413. Second multi-stage telescopic rod; 501. Third baffle; 502. Third multi-stage telescopic rod; 503. Second push plate; 504. Fourth baffle; 505. Fourth multi-stage telescopic rod; 506. Second jaw; 507. Loading plate; 508. Second top plate; 509. Third support column; 510. Second partition plate; 511. Fourth support column; 512. Third slide rail; 513. Third linear motor. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figure 1-4 shown, the embodiment of the present invention provides an electric vehicle battery box replacement device, including a fixing mechanism 3, a support mechanism 1 is slidably arranged on the surface of the fixing mechanism 3, lifting mechanisms 2 are fixedly arranged at the four corners on the outside of the fixing mechanism 3, a recycling mechanism 4 is fixedly arranged on one side of the lifting mechanism 2, and a loading mechanism 5 is fixedly arranged on the other side of the lifting mechanism 2.

[0032] Specifically, by providing a fixing mechanism 3, it is convenient for the user to fix the whole device to a suitable position for use. By providing a supporting mechanism 1, it is convenient to support the position of the battery box under the vehicle, preventing it from falling during the battery box replacement process. By providing a lifting mechanism 2, it is convenient for the user to lift the vehicle to a suitable height, facilitating subsequent operations by the user. By providing a feeding mechanism 5, it is convenient for the user to transfer a new battery box to be replaced to below the vehicle. By providing a recycling mechanism 4, it is convenient for the user to uniformly recycle and process the replaced old battery box as a whole.

[0033] As Figure 5-10 shown, the supporting mechanism 1 includes a moving plate 106. At the four corners of the moving plate 106, first linear motors 108 are fixedly arranged. The four first linear motors 108 are grouped in pairs of two, and two protective plates 109 are fixedly arranged at both ends. At the middle position of the opposite side surfaces of the four protective plates 109 grouped in pairs of two, cleaning brushes 110 are fixedly arranged. At the four corners of the bottom surface of the moving plate 106, inclined support plates 107 are fixedly arranged. At the four corners of the upper surface of the moving plate 106, telescopic cylinders 105 are fixedly arranged. At the upper ends of the four telescopic cylinders 105, a bottom plate 104 is fixedly arranged. On the upper surface of the bottom plate 104, two first guide plates 103 are slidably arranged. At the four corners of the upper surface of the bottom plate 104, support frames 102 are fixedly arranged. At the upper ends of the four support frames 102, a support plate 101 is fixedly arranged.

[0034] Specifically, by providing the moving plate 106 and the first linear motors 108, it is beneficial to realize the functions of position adjustment and movement of the supporting mechanism 1. By providing the protective plates 109 and the cleaning brushes 110, it is beneficial to clean the surface of the first slide rail 304 of the device, improving the smoothness during the use of the device. By providing the inclined support plates 107, it is beneficial to improve the load-bearing function of the device. By providing the telescopic cylinders 105, it is convenient to adjust the overall height of the supporting mechanism 1. By providing the bottom plate 104, the support plate 101 and the first guide plates 103, it is convenient to place the battery box and facilitate its connection and use with the feeding mechanism 5 and the recycling mechanism 4.

[0035] The lifting mechanism 2 includes four bases 210. At the upper ends of the four bases 210, lifting columns 203 are fixedly arranged. At the upper ends of the four lifting columns 203, motor boxes 202 are fixedly arranged. Inside the four motor boxes 202, threaded rods 209 are fixedly arranged. At one end of the four threaded rods 209, servo motors 208 are fixedly arranged. On the surfaces of the four lifting columns 203, lifting grooves 204 are formed. On the surfaces of the four threaded rods 209, lifting blocks 205 are slidably arranged. At one end of the four lifting blocks 205, placing plates 206 are fixedly arranged. Inside the two placing plates 206, extension plates 207 are slidably arranged. Between the four lifting columns 203, protective fences 201 are fixedly arranged.

[0036] Specifically, by providing a servo motor 208 and a threaded rod 209, combined with a lifting block 205, it is convenient for the user to lift the vehicle to an appropriate height, facilitating the user to replace the battery box located at the bottom of the vehicle. By providing a placement plate 206 and an extension plate 207, it is convenient for the user to park the vehicle. By providing a guardrail 201, it is beneficial to prevent the vehicle from falling from a height, enhancing the safety of the device during use.

[0037] The fixing mechanism 3 includes a fixing bracket 302. One end of the fixing bracket 302 is fixedly provided with a limiting plate 301, the other end of the fixing bracket 302 is fixedly provided with a second guiding plate 303, and both sides inside the fixing bracket 302 are fixedly provided with first sliding rails 304.

[0038] Specifically, by providing a limiting plate 301, it is beneficial to prevent danger caused by dislocation during the movement of the device. By providing a fixing bracket 302 and first sliding rails 304, it is beneficial to provide space for adjusting the position of the supporting mechanism 1. By providing a second guiding plate 303, it is convenient for the user to drive the electric vehicle onto the device.

[0039] The recycling mechanism 4 includes two first support columns 403 and four second support columns 405. A plurality of first partition plates 402 are fixedly provided on one side of the two first support columns 403. A first top plate 401 is fixedly provided at the upper ends of the two first support columns 403 and the four second support columns 405. Second sliding rails 406 are fixedly provided on the opposite surfaces of the four second support columns 405. Second linear motors 404 are slidably provided on the surfaces of the four second sliding rails 406. A recycling plate 410 is fixedly provided on one side of the four second linear motors 404. A first baffle 407 is fixedly provided on one side of the recycling plate 410. Two first multi-stage telescopic rods 408 are fixedly provided at one end of the first baffle 407. First clamping jaws 409 are fixedly provided at one end of the two first multi-stage telescopic rods 408. A second baffle 411 is fixedly provided on the other side of the first baffle 407. Two second multi-stage telescopic rods 413 are fixedly provided on the surface of the second baffle 411. A first pushing plate 412 is fixedly provided at one end of the two second multi-stage telescopic rods 413.

[0040] Specifically, by providing a recycling plate 410, combined with the second linear motor 404 and the second sliding rail 406, it is convenient for the user to adjust the position of the recycling plate 410 so that it can be docked with different first partition plates 402, facilitating the storage and placement of the replaced waste battery box. By providing two first multi-stage telescopic rods 408 and first clamping jaws 409, it is convenient to clamp the waste battery box on the surface of the lifting mechanism 1 and move it to the surface of the recycling plate 410. By providing second multi-stage telescopic rods 413 and a first pushing plate 412, it is convenient to push the waste battery box on the surface of the recycling plate 410 and place it on the surface of the first partition plate 402.

[0041] The loading mechanism 5 includes two third support columns 509 and four fourth support columns 511. A plurality of second partition plates 510 are fixedly arranged on one side of the two third support columns 509. A second top plate 508 is fixedly arranged at the upper ends of the two third support columns 509 and the four fourth support columns 511. Third slide rails 512 are fixedly arranged on the opposite surfaces of the four fourth support columns 511. Third linear motors 513 are slidably arranged on the surfaces of the four third slide rails 512. Loading plates 507 are fixedly arranged on one side surfaces of the four third linear motors 513. A fourth baffle 504 is fixedly arranged on one side of the loading plate 507. Two fourth multi-stage telescopic rods 505 are fixedly arranged on the surface of the fourth baffle 504. Second clamping jaws 506 are fixedly arranged at one ends of the two fourth multi-stage telescopic rods 505. A third baffle 501 is fixedly arranged on the other side of the upper surface of the loading plate 507. Two third multi-stage telescopic rods 502 are fixedly arranged on one side of the third baffle 501. Second pushing plates 503 are fixedly arranged at one ends of the two third multi-stage telescopic rods 502.

[0042] Specifically, by providing a plurality of second partition plates 510, it is convenient for the user to place new battery boxes. By providing the third slide rails 512, in combination with the third linear motors 513 and the loading plates 507, it is convenient for the user to place the new battery boxes that need to be replaced. By providing the fourth multi-stage telescopic rods 505 and the second clamping jaws 506, it is convenient for the user to remove the new battery boxes that need to be replaced from the surface of the second partition plates 510 and place them on the surface of the loading plates 507. By providing the third multi-stage telescopic rods 502 and the second pushing plates 503, it is convenient for the user to push the new battery boxes that need to be replaced onto the surface of the support mechanism 1 for replacement.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle battery box replacement device, comprising a fixing mechanism (3), characterized in that: The surface of the fixing mechanism (3) is slidably provided with a supporting mechanism (1) for supporting the battery box under the vehicle; The four outer corners of the fixing mechanism (3) are fixedly provided with lifting mechanisms (2) to lift the vehicle to a suitable height; A recycling mechanism (4) is fixedly arranged on one side of the lifting mechanism (2) to uniformly recycle the replaced old battery boxes as a whole; A loading mechanism (5) is fixedly arranged on the other side of the lifting mechanism (2) to transport a new battery box to be replaced to the bottom of the vehicle; The support mechanism (1) comprises a movable plate (106), the movable plate (106) is fixedly provided with a first linear motor (108) at four corners, four first linear motors (108) are fixedly provided with two protective plates (109) at both ends in a group of two, the four protective plates (109) are fixedly provided with a cleaning brush (110) at the middle position of the surface of one opposite side in a group of two, the bottom surface of the movable plate (106) is fixedly provided with a diagonal support plate (107), and the upper surface of the movable plate (106) is fixedly provided with a telescopic cylinder (105) at four corners; A bottom plate (104) is fixedly arranged on the upper ends of the four telescopic cylinders (105); two first guide plates (103) are slidably arranged on the upper surface of the bottom plate (104); support frames (102) are fixedly arranged at the four corners of the upper surface of the bottom plate (104); and support plates (101) are fixedly arranged on the upper ends of the four support frames (102); The fixing mechanism (3) comprises a fixing bracket (302), a limiting plate (301) is fixedly arranged at one end of the fixing bracket (302), a second guide plate (303) is fixedly arranged at the other end of the fixing bracket (302), and first slide rails (304) are fixedly arranged on both sides of the fixing bracket (302); the fixing bracket (302) and the first slide rails (304) provide space for adjusting the position of the supporting mechanism (1); By providing a moving plate (106) and a first linear motor (108), the support mechanism (1) is positionally adjusted and moved; by providing a protective plate (109) and a cleaning brush (110), the surface of the first slide rail (304) of the device is cleaned.

2. The electric vehicle battery box replacement device according to claim 1, characterized in that: The lifting mechanism (2) comprises four bases (210), the upper ends of the four bases (210) are fixedly provided with lifting pillars (203), the upper ends of the four lifting pillars (203) are fixedly provided with motor boxes (202), the interiors of the four motor boxes (202) are fixedly provided with threaded rods (209), one ends of the four threaded rods (209) are fixedly provided with servo motors (208), and the surfaces of the four lifting pillars (203) are provided with lifting grooves (204).

3. The electric vehicle battery box replacement device according to claim 2 is characterized in that: A lifting block (205) is slidably arranged on the surface of the four threaded rods (209), a placement plate (206) is fixedly arranged at one end of the four lifting blocks (205), an extension plate (207) is slidably arranged inside two of the placement plates (206), and a guardrail (201) is fixedly arranged between the four lifting pillars (203).

4. The electric vehicle battery box replacement device according to claim 1, characterized in that: The recovery mechanism (4) comprises two first support columns (403) and four second support columns (405), a plurality of first partition plates (402) are fixedly arranged on one side of the two first support columns (403), a first top plate (401) is fixedly arranged on the upper ends of the two first support columns (403) and the four second support columns (405), and a second slide rail (406) is fixedly arranged on the surface of the opposite side of the four second support columns (405).

5. The electric vehicle battery box replacement device according to claim 4 is characterized in that: The surfaces of the four second slide rails (406) are all slidably provided with second linear motors (404); one side of the four second linear motors (404) is fixedly provided with a recovery plate (410); one side of the recovery plate (410) is fixedly provided with a first baffle (407); one side of the first baffle (407) is fixedly provided with two first multi-stage telescopic rods (408); one end of the two first multi-stage telescopic rods (408) is fixedly provided with a first clamping claw (409); the other side of the first baffle (407) is fixedly provided with a second baffle (411); two second multi-stage telescopic rods (413) are fixedly provided on the surface of the second baffle (411); one end of the two second multi-stage telescopic rods (413) is fixedly provided with a first push plate (412).

6. The electric vehicle battery box replacement device according to claim 1, characterized in that: The feeding mechanism (5) comprises two third support columns (509) and four fourth support columns (511), a plurality of second partition plates (510) are fixedly arranged on one side of the two third support columns (509), a second top plate (508) is fixedly arranged on the upper ends of the two third support columns (509) and the four fourth support columns (511), and a third slide rail (512) is fixedly arranged on the surface of the opposite side of the four fourth support columns (511).

7. The electric vehicle battery box replacement device according to claim 6, characterized in that: A third linear motor (513) is slidably arranged on the surface of the four third slide rails (512); a loading plate (507) is fixedly arranged on one side surface of the four third linear motors (513); a fourth baffle (504) is fixedly arranged on one side of the loading plate (507); two fourth multi-stage telescopic rods (505) are fixedly arranged on the surface of the fourth baffle (504); a second clamping claw (506) is fixedly arranged at one end of the two fourth multi-stage telescopic rods (505); a third baffle (501) is fixedly arranged on the other side of the upper surface of the loading plate (507); two third multi-stage telescopic rods (502) are fixedly arranged on one side of the third baffle (501); a second push plate (503) is fixedly arranged at one end of the two third multi-stage telescopic rods (502).

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