A heavy truck seat assembly transfer device

Abstract

A heavy truck seat assembly transfer device belongs to the technical field of automobile production, which comprises a mobile chassis, side frames fixedly arranged on the left and right sides of the mobile chassis, and a rear frame fixedly arranged on the rear side of the mobile chassis, and further comprises two oppositely arranged middle layer supports and two oppositely arranged upper layer supports, a plurality of front-end open sliding rail grooves are fixedly arranged on the mobile chassis, the middle layer supports and the upper layer supports, the middle layer supports and the upper layer supports are hingedly connected with the adjacent side frames, the upper layer supports are arranged in a staggered manner above the middle layer supports, the upper layer supports are located on the front side of the middle layer supports, and the distance between the upper layer supports and the rear frame is greater than the distance between the middle layer supports and the rear frame, so that the backrests of the seat assemblies of each layer can be formed in a front and rear adhering stacking state, the vertical distance between the adjacent two layers of supports is greatly shortened, the space equal to the height of the seat assembly does not need to be reserved, and thus the overall height of the transfer device is effectively reduced, and sufficient structural conditions are provided for adding the number of layers of supports.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a heavy truck seat assembly transfer device. Background Technology

[0002] The seat assembly of a heavy truck weighs about 40KG. Because the weight exceeds the reasonableness of a single person to carry it, a robotic arm is usually required. The robotic arm grabs the seat assembly from the front, puts it into the cab, and then assembles it.

[0003] Currently, in order to improve production efficiency, multiple seat assemblies are transferred synchronously using a transfer device. Existing transfer devices (such as CN219407455U) typically have two layers, with the distance between adjacent layer supports not less than the height of the seat assembly. Each layer of supports is used to place multiple seat assemblies to achieve synchronous transfer of multiple seat assemblies.

[0004] The existing transfer device has a large gap between the upper and lower layers, resulting in a high overall height of the transfer device, which limits the number of layers that can be added and restricts the improvement of transfer efficiency. In addition, in order to facilitate the robotic arm to grasp the seat assembly from the front, there cannot be any railings or other structures on the front of the transfer device to avoid obstructing the robotic arm's movement. In this case, in order to restrict the position of the seat assembly and prevent it from falling during the transfer, clamps and other limiting structures need to be set at each slide rail opening. Before removing the seat assembly, the limiting structures at each slide rail opening need to be released one by one, which is inefficient. Utility Model Content

[0005] To address the technical problem in the background art where the existing transfer devices have large spacing between upper and lower layers, resulting in a high overall height of the transfer device, which limits the addition of more layers and restricts the improvement of transfer efficiency, this utility model provides a heavy truck seat assembly transfer device.

[0006] The technical solution of this utility model is as follows: This utility model provides a heavy-duty truck seat assembly transfer device, including a movable base frame, side frames fixedly provided on the left and right sides of the movable base frame, a rear frame fixedly provided on the rear side of the movable base frame, and two oppositely arranged middle supports and two oppositely arranged upper supports. The movable base frame, middle supports, and upper supports are all fixedly provided with a number of slide rail grooves with front openings. The middle supports and upper supports are hinged to the adjacent side frames. The upper supports and middle supports are staggered vertically. The upper supports are located in front of the middle supports. The distance between the upper supports and the rear frame is greater than the distance between the middle supports and the rear frame. Two seat backs are placed sequentially between the upper supports and the rear frame along the width direction of the transfer device, and one seat back is placed between the middle supports and the rear frame along the width direction of the transfer device. The layered, staggered bracket layout allows the backrests of each seat assembly to be stacked together in a front-to-back manner, significantly reducing the vertical distance between adjacent bracket layers. This eliminates the need to reserve space equal to the height of the seat assembly, effectively reducing the overall height of the transfer device and providing sufficient structural conditions for adding more bracket layers. At the same time, the openings of the slide rails on each layer face in the same direction and are unobstructed, which can accommodate the front-facing gripping action of the robotic arm. This increases the number of seat assemblies that can be transferred per unit space while ensuring the convenience of subsequent retrieval operations.

[0007] Preferably, the widths of the middle and upper supports are equal and both smaller than the width of the movable base frame. This ensures that the distance between the middle and upper supports and the rear frame is maintained when the middle and upper supports are staggered, facilitating the extension and stacking of seat backs of different layers.

[0008] Preferably, a first pin and a second pin are fixedly provided on the side frame. The first pin and the second pin are staggered vertically, with the first pin located on one side of the middle support and the second pin located on one side of the upper support. The staggered pin structure can stably limit the middle and upper supports in the lifted state, preventing the upper or middle supports from accidentally falling back when removing or lowering the lower seat assembly. This provides a stable and safe operating space for the robotic arm. The independent pin limiting method also enables the step-by-step opening and closing of the middle and upper supports, adapting to the part removal process of different levels of seat assemblies and improving the orderliness and controllability of the operation.

[0009] Preferably, a rotating shaft is rotatably mounted on the front outer wall of the upper support, extending along the length of the upper support. Several baffles are fixed on the rotating shaft, spaced apart along its length. The number of baffles corresponds one-to-one with the number of slide rail slots on the upper support. These baffles, corresponding to the slide rail slots, can limit the front end of the seat assembly on the upper support during transport, preventing the seat assembly from sliding out of the slide rail slot opening due to vehicle start-stop or bumps. Furthermore, the rotating shaft allows for quick switching of the baffle states, eliminating the need for individual limiting clamps at each slide rail slot and significantly simplifying the overall layout of the limiting structure.

[0010] Preferably, a third pin is fixed on the upper support, located behind the rotating shaft. A limiting plate is fixed on the rotating shaft, with its surface perpendicular to the surface of the baffle and close to the third pin. The cooperation between the limiting plate and the third pin precisely locks the rotation angle of the rotating shaft, ensuring that the baffle remains vertically limited during transport and horizontally stored during item retrieval. This prevents the baffle from loosening or rotating accidentally due to vibration. The rotating shaft can achieve synchronous limiting of all baffles, which greatly reduces the number of limiting and unlocking steps compared to limiting each slide rail individually, improving the preparation efficiency before item retrieval.

[0011] Preferably, a support frame is fixedly mounted on the mobile base frame to support the middle-level support in a horizontal state. A support column is installed on the support frame to support the upper-level support in a horizontal state. The support frame includes a vertical beam and a horizontal beam. The top of the vertical beam contacts the middle-level support, and a connector is fixed on the horizontal beam. A limiting groove is provided on the connector. The bottom end of the support column is inserted into the connector, and a limiting post is fixed to the bottom side wall of the support column, inserted into the limiting groove. The support frame and support column provide stable support for the horizontal middle-level and upper-level supports respectively, distributing the weight of the support and seat assembly and preventing deformation at the hinges due to excessive load. The cooperation of the limiting groove and the limiting post allows for quick erection and folding of the support column. When it is necessary to lift the upper-level support to retrieve or place the middle-level seat, the support for the upper-level support can be easily released. Furthermore, the retracted state of the support column does not occupy additional working space, ensuring unobstructed operation of the robotic arm.

[0012] Preferably, the limiting groove includes a long strip and a circular part, with the circular part located above the long strip. The inner diameter of the circular part is larger than the width of the long strip. The connector is an oblong column, with a cross-sectional length no greater than the inner diameter of the circular part and a cross-sectional width equal to the width of the long strip. This unique structure of the limiting groove allows for switching between limiting and rotating the support column. When the limiting column is moved to the circular part, the support column can rotate freely for folding and storage. When the limiting column is engaged with the long strip, the support column remains vertically supported. No additional locking components are needed; the state switching of the support column can be completed simply by lifting and rotating, simplifying the operation process and improving the efficiency of the bracket's state switching.

[0013] Preferably, a first fixing part is fixedly installed on one side frame, and a second fixing part is fixedly installed on the other side frame. The first fixing part and the second fixing part are connected by a rope. The rope can compress and bind the seat assembly of the upper support as a whole. Combined with the limiting effect of the baffle, it further enhances the stability of the seat assembly during transportation and prevents it from shaking or shifting.

[0014] Preferably, a plug is fixedly provided at the top of the side frame corner, a socket is fixedly provided at the bottom of the side frame corner, and a fork slot is fixedly provided at the bottom of the movable base. The combination of the plug and socket allows multiple transfer devices to be stacked vertically, making full use of vertical space and increasing the overall storage and transfer capacity during warehousing or long-distance transfer. The fork slot can be adapted to the transfer operation of forklifts, facilitating the rapid transfer of the device between different workstations.

[0015] Preferably, the bottom of the mobile base is fixed with several wheels with braking function, which can realize the free movement and fixed-point parking of the transfer device.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are: 1. The layered and staggered bracket layout allows the seat assembly backrests to extend upwards, enabling the backrests of each layer of seat assemblies to form a front-to-back stacked state. This significantly shortens the vertical distance between adjacent bracket layers, eliminating the need to reserve space equal to the height of the seat assembly. This effectively reduces the overall height of the transfer device and provides sufficient structural conditions for adding more bracket layers. At the same time, the openings of the slide rails on each layer face the same direction and are unobstructed, which can be adapted to the front gripping action of the robotic arm. This increases the number of seat assemblies transferred per unit space while ensuring the convenience of subsequent retrieval operations.

[0017] 2. The baffles corresponding to the slide rails can limit the front end of the seat assembly of the upper bracket during transportation, preventing the seat assembly from sliding out of the slide rail opening due to vehicle start-stop or bumps. The rotating shaft can realize the synchronous limiting of all baffles, greatly reducing the operation steps of limiting and unlocking, improving the preparation efficiency before picking up the parts. In addition, the cooperation between the limiting plate and the third pin can precisely lock the rotation angle of the rotating shaft, ensuring that the baffles remain in a vertical limiting state during transportation and in a horizontal storage state when picking up the parts, avoiding the baffles from loosening or rotating accidentally due to vibration. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the heavy-duty truck seat assembly transfer device according to one or more embodiments of the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the heavy-duty truck seat assembly transfer device according to one or more embodiments of the present invention. Figure 2 ; Figure 3 This is a frontal view structural diagram of the heavy truck seat assembly transfer device according to one or more embodiments of the present invention; Figure 4 This is a top view structural diagram of the heavy truck seat assembly transfer device according to one or more embodiments of the present invention. Figure 5 This is a side view structural diagram of the heavy truck seat assembly transfer device according to one or more embodiments of the present invention; Figure 6 This is a partially enlarged structural diagram of the connection position between the support frame and the support column according to one or more embodiments of the present invention; Figure 7 This is a schematic diagram of the usage state of the heavy truck seat assembly transfer device according to one or more embodiments of the present invention; The components represented by the various reference numerals in the diagram are: 1. Mobile base frame; 2. Side frame; 3. Rear frame; 4. Middle layer support; 5. Upper layer support; 6. Slide rail groove; 7. Support frame; 71. Vertical beam; 72. Horizontal beam; 8. Support column; 9. Connector; 10. Limiting groove; 11. Limiting post; 12. First pin; 13. Second pin; 14. Rotating shaft; 15. Baffle; 16. Limiting plate; 17. Third pin; 18. First fixing part; 19. Second fixing part; 20. Fork slot; 21. Plug; 22. Socket; 23. Wheel. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1 In a typical embodiment of this utility model, such as Figures 1-7As shown, a heavy-duty truck seat assembly transfer device is proposed, including: a movable base frame 1, side frames 2, a rear frame 3, a middle support 4, an upper support 5, a support frame 7, and a support column 8. Two side frames 2 are fixedly installed on the left and right sides of the movable base frame 1 by welding. The rear frame 3 is fixedly installed on the rear side of the movable base frame 1 by welding. The rear frame 3, together with the two side frames 2, forms a structure with a front opening. Two middle supports 4 are provided, arranged opposite each other and hinged to adjacent side frames 2. The middle supports 4 can be lifted around an axis. The upper support 5 is located above the middle supports 4. Two upper supports 5 are also provided, arranged opposite each other and hinged to adjacent side frames 2. The upper supports 5 can be lifted around an axis. The support frame 7 is fixedly installed on the movable base frame 1 to support the middle supports 4 in a horizontal state. The support column 8 is installed on the support frame 7 to support the upper support 5 in a horizontal state.

[0022] In this embodiment, the widths of the middle support 4 and the upper support 5 are equal and both smaller than the width of the movable base 1. The upper support 5 and the middle support 4 are staggered from front to back. Specifically, the upper support 5 is closer to the front of the transfer device, the middle support 4 is located in the middle area of ​​the transfer device, and the distance between the upper support 5 and the rear frame 3 is greater than the distance between the middle support 4 and the rear frame 3. Figure 7 As shown, this allows two seat backs to be placed sequentially between the upper support 5 and the rear support 3 along the width of the transfer device, and one seat back to be placed between the middle support 4 and the rear support 3 along the width of the transfer device. The seat backs can extend upwards, so that the distance between the middle support 4 and the upper support 5 does not need to be greater than the height of the seat assembly, effectively reducing the distance between adjacent support layers, and thus facilitating the addition of more layers of the transfer device.

[0023] It is understood that in other embodiments, other numbers of layers may be set, and the specific number can be selected according to actual needs. No further restrictions are imposed here.

[0024] In this embodiment, each side frame 2 is fixed with a first pin 12 and a second pin 13. The first pin 12 and the second pin 13 are staggered vertically. The first pin 12 is located on one side (front or rear) of the middle layer support 4, and the second pin 13 is located on one side (front or rear) of the upper layer support 5. Both the first pin 12 and the second pin 13 include a fixed seat and a movable pin. The position of the movable pin can be changed by manually pushing and pulling, thereby using the horizontally arranged movable pin to temporarily limit the lifting of the middle layer support 4 or the upper layer support 5.

[0025] Several slide rail grooves 6 are fixedly provided on the mobile base frame 1, the middle support 4 and the upper support 5. The slide rail grooves 6 are spaced apart along the length of the corresponding support. The front end of the slide rail groove 6 is open. The slide rail groove 6 is used to cooperate with the slide rail at the bottom of the seat assembly to limit the position of the seat assembly. The front end opening of the slide rail groove 6 makes it easy for the robot to quickly remove the seat assembly from the corresponding support from the front.

[0026] like Figure 1 , Figure 3 and Figure 4 As shown, a rotating shaft 14 is rotatably mounted on the front outer wall of the upper support 5. The rotating shaft 14 extends along the length direction of the upper support 5, and its axis is parallel to the axis of the upper support 5 along its length. Several baffles 15 are welded and fixed to the rotating shaft 14. The baffles 15 are spaced apart along the length direction of the rotating shaft 14. The number of baffles 15 is the same as the number of slide rail grooves 6 on the upper support 5 and they correspond one-to-one. The baffles 15 cover the front opening of the slide rail grooves 6, thereby limiting the seat assembly on the upper support 5. The seat assembly is positioned to prevent it from slipping during transport. The opening or closing of all slide rail slots 6 on the upper support 5 can be achieved simply by rotating the pivot 14. At the same time, the upper support 5 and the rear frame 3 can be used to clamp and limit the seats on the middle support 4 and the movable base frame 1. The middle support 4 and the rear frame 3 can be used to clamp and limit the seats on the movable base frame 1. There is no need to set the limiting structure of slide rail slots 6 on the middle support 4 and the movable base frame 1, which simplifies the structure, facilitates operation, and effectively improves work efficiency.

[0027] like Figure 1 and Figure 4 As shown, a third pin 17 is also fixed on the upper bracket 5. The third pin 17 is located on the rear side of the rotating shaft 14. At the same time, a limiting plate 16 is also fixed on the rotating shaft 14. The plate surface of the limiting plate 16 is perpendicular to the plate surface of the baffle 15, and the limiting plate 16 is close to the third pin 17. Thus, when the limiting plate 16 is in a horizontal state and is limited by the third pin 17, the baffle 15 is in a vertical state to block the opening end of the slide rail groove 6. When the limiting plate 16 is in a vertical state, it is separated from the third pin 17, and the baffle 15 is in a horizontal state to release the blocking of the opening end of the slide rail groove 6.

[0028] In this embodiment, the free ends of the middle support 4 and the upper support 5 are both fixedly provided with slide rail grooves 6, so that the two middle supports 4 and the upper support 5 can be used to support and limit a seat assembly at the same time, ensuring space utilization, and also making it easy to use the seat assembly to press the free ends of the middle support 4 and the upper support 5 to prevent the free ends from shaking during transportation.

[0029] like Figure 2As shown, there are two support frames 7, which are spaced apart along the length of the movable base frame 1. The support frames 7 are fixedly installed at the middle position of the movable base frame 1 to support the middle layer support 4, so that the middle layer support 4 maintains a stable horizontal state.

[0030] The support frame 7 has an H-shaped structure and includes vertical beams 71 and horizontal beams 72. There are two vertical beams 71, which are arranged opposite each other to support the bottom of the front and rear sides of the middle layer support 4. The horizontal beams 72 are fixedly arranged between the two vertical beams 71.

[0031] The support column 8 is installed on the crossbeam 72 of the support frame 7, and the support column 8 is close to the front side of the middle support 4. The support column 8 passes through the middle support 4 and supports the upper support 5 so that the upper support 5 can be in a stable horizontal state. A U-shaped bracket is fixed on the top of the support column 8. The distance between the support column 8 and the adjacent vertical beam 71 is the same as the width of the longitudinal beam of the middle support 4, thereby limiting the back-and-forth swaying of the middle support 4.

[0032] like Figure 6 As shown, a connector 9 is welded and fixed on the crossbeam 72. A limiting groove 10 is opened on the connector 9. The bottom end of the support column 8 is inserted into the connector 9, and a limiting column 11 is welded and fixed on the bottom side wall of the support column 8. The limiting column 11 is inserted into the limiting groove 10. The state of the support column 8 can be quickly changed through the cooperation of the limiting column 11 and the limiting groove 10.

[0033] Specifically, the limiting groove 10 includes a long strip and a round part. The round part is located above the long strip and is connected to the long strip. The inner diameter of the round part is greater than the width of the long strip. The connector 9 is an oblong column, that is, the cross-sectional shape of the connector 9 is oblong. The cross-sectional length of the connector 9 is not greater than the inner diameter of the round part, and the cross-sectional width of the connector 9 is equal to the width of the long strip. When the support column 8 is in a vertical state, the connector 9 is inserted into the long strip of the limiting groove 10, thereby restricting the rotation of the support column 8. When the support column 8 needs to be lowered, the support column 8 can be lifted upward, so that the connector 9 moves into the round part, thereby allowing the support column 8 to be lowered.

[0034] Such as 2 and Figure 5 As shown, a first fixing part 18 is fixed on one side frame 2, and a second fixing part 19 is fixed on the other side frame 2. The first fixing part 18 and the second fixing part 19 are connected by a rope, so that the seat assembly on the upper support 5 can be limited by the rope to restrict the vertical movement of the seat assembly. In conjunction with the limiting of the slide rail groove 6, the stability of the seat assembly is effectively improved.

[0035] The bottom of the mobile base frame 1 is fixedly equipped with several wheels 23. The wheels 23 are universal wheels with braking function and are installed at the four corners of the mobile base frame 1. The top of the corner of the side frame 2 is fixedly equipped with a plug 21 and the bottom of the corner of the side frame 2 is fixedly equipped with a socket 22. The bottom of the mobile base frame 1 is fixedly equipped with a fork slot 20. The fork slot 20 is used to connect with the forks, so as to facilitate the handling and lifting of the transfer device by using a forklift. The cooperation of the plug 21 and the socket 22 enables the stacking of multiple transfer devices and ensures the stability of the stacking of transfer devices.

[0036] The specific working principle is as follows: When placing the seat assemblies, lift and limit the middle support 4 and upper support 5. First, place the corresponding number of seat assemblies on the movable base 1, and push the seat assemblies on the movable base 1 backward so that the backrest of the seat assembly on the movable base 1 is in contact with the rear frame 3. Then, release the limit of the middle support 4 so that the middle support 4 is laid down to a horizontal position. Place the corresponding number of seat assemblies on the middle support 4, and push the seat assemblies on the middle support 4 backward so that the backrest of the seat assembly on the middle support 4 is in contact with the front of the backrest of the seat assembly on the movable base 1. Finally, release the limit of the upper support 5, so that the upper support 5 is laid down to a horizontal position. Place the corresponding number of seat assemblies on the upper support 5, and push the seat assemblies on the upper support 5 backward so that the back of the seat assembly on the upper support 5 is in contact with the front of the back of the seat assembly on the middle support 4. After all the seat assemblies are placed, rotate the pivot 14 on the upper support 5 so that the baffle 15 is erected and the limiting plate 16 is placed horizontally. Use the third pin 17 to limit and lock the limiting plate 16, and use ropes to press and bind the seat assemblies on the upper support 5.

[0037] When assembling the seat assembly, first remove the ropes, release the third pin 17 from the limiting plate 16, rotate the shaft 14 so that the baffle 15 is placed horizontally and the limiting plate 16 is erected. The robot arm grabs the corresponding seat assembly on the upper bracket 5 from the front and pulls it out horizontally. After all the seat assemblies on the upper bracket 5 are assembled, lift the upper bracket 5 and use the second pin 13 to limit it. Lift the support column 8 and lay it down. Then the robot arm grabs the corresponding seat assembly on the middle bracket 4 from the front and pulls it out horizontally. After all the seat assemblies on the middle bracket 4 are assembled, lift the middle bracket 4 and use the first pin 12 to limit it. Finally, the robot arm grabs the corresponding seat assembly on the movable base frame 1 from the front and pulls it out horizontally for assembly. The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heavy-duty truck seat assembly transfer device, comprising: The movable base frame (1) has side frames (2) fixed on its left and right sides and a rear frame (3) fixed on its rear side. The movable base frame (1) is characterized by including two opposing middle supports (4) and two opposing upper supports (5). Several slide rail grooves (6) with front openings are fixed on the movable base frame (1), the middle supports (4) and the upper supports (5). The middle supports (4) and the upper supports (5) are hinged to the adjacent side frames (2). The upper supports (5) and the middle supports (4) are staggered vertically. The upper supports (5) are located in front of the middle supports (4). The distance between the upper supports (5) and the rear frame (3) is greater than the distance between the middle supports (4) and the rear frame (3). Two seat backs are placed between the upper supports (5) and the rear frame (3) in sequence along the width direction of the transfer device. One seat back is placed between the middle supports (4) and the rear frame (3) along the width direction of the transfer device.

2. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, The widths of the middle support (4) and the upper support (5) are equal and both are smaller than the width of the movable base frame (1).

3. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, The side frame (2) is fixedly provided with a first pin (12) and a second pin (13). The first pin (12) and the second pin (13) are staggered vertically. The first pin (12) is located on one side of the middle layer support (4), and the second pin (13) is located on one side of the upper layer support (5).

4. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, A rotating shaft (14) is rotatably provided on the front outer wall of the upper support (5). The rotating shaft (14) extends along the length direction of the upper support (5). Several baffles (15) are fixed on the rotating shaft (14). The baffles (15) are spaced apart along the length direction of the rotating shaft (14). The number of baffles (15) is the same as the number of slide rail grooves (6) on the corresponding upper support (5) and they correspond one-to-one.

5. The heavy-duty truck seat assembly transfer device according to claim 4, characterized in that, A third pin (17) is fixed on the upper bracket (5). The third pin (17) is located on the rear side of the rotating shaft (14). A limiting plate (16) is fixed on the rotating shaft (14). The plate surface of the limiting plate (16) is perpendicular to the plate surface of the baffle (15). The limiting plate (16) is close to the third pin (17).

6. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, A support frame (7) is fixed on the mobile base frame (1). The support frame (7) is used to support the middle layer support (4) in a horizontal state. A support column (8) is installed on the support frame (7). The support column (8) is used to support the upper layer support (5) in a horizontal state. The support frame (7) includes a vertical beam (71) and a horizontal beam (72). The top of the vertical beam (71) contacts the middle layer support (4). A connector (9) is fixed on the horizontal beam (72). A limit groove (10) is opened on the connector (9). The bottom end of the support column (8) is inserted into the connector (9). A limit post (11) is fixed on the bottom side wall of the support column (8). The limit post (11) is inserted into the limit groove (10).

7. The heavy-duty truck seat assembly transfer device according to claim 6, characterized in that, The limiting groove (10) includes a long strip and a round part. The round part is located above the long strip. The inner diameter of the round part is greater than the width of the long strip. The connector (9) is a waist-shaped column. The cross-sectional length of the connector (9) is not greater than the inner diameter of the round part. The cross-sectional width of the connector (9) is equal to the width of the long strip.

8. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, A first fixing part (18) is fixed on one side frame (2), and a second fixing part (19) is fixed on the other side frame (2). The first fixing part (18) and the second fixing part (19) are connected by a rope.

9. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, A plug (21) is fixedly provided at the top of the corner of the side frame (2), a socket (22) is fixedly provided at the bottom of the corner of the side frame (2), and a fork slot (20) is fixedly provided at the bottom of the movable base frame (1).

10. The heavy-duty truck seat assembly transfer device according to claim 1, characterized in that, The bottom of the mobile base (1) is fixed with several wheels (23) with braking function.

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