Bearing driving device for vehicle sliding plug door

Abstract

The invention relates to the technical field of sliding plug door bearing and driving devices, and discloses a bearing and driving device for a vehicle sliding plug door, which comprises a fixed frame, a driving mechanism is arranged above the fixed frame, a connecting mechanism is arranged on the outer side of the fixed frame, the driving mechanism comprises a supporting frame, the bottom surface of the supporting frame is fixedly connected with the upper surface of the fixed frame, and the bottom surface of the supporting frame is fixedly connected with the upper surface of the fixed frame. Two protective cover plates are movably hinged to the inner wall of the fixing frame, an elastic pad is fixedly connected to the back face of each protective cover plate, and the back face of each elastic pad makes contact with the front face of the fixing frame. According to the bearing driving device for the vehicle sliding plug door, when a rotating column rotates, a rotating frame on the surface can be driven to rotate, the rotating frame can drive a spring and a pull block to rotate, and then a protective cover plate can be conveniently pulled subsequently under the action of the pull block to conduct quick opening work; and meanwhile, the spring facilitates random movement of the position of the pull block, so that the condition of movement obstruction when the pull block moves with the protective cover plate is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of a bearing drive device for a plug sliding door, and in particular to a bearing drive device for a plug sliding door of a vehicle. Background Art

[0002] The Sierra door load-bearing drive device is a key component used to support and drive the Sierra door in rail vehicles. The Sierra door is a special door structure whose door leaf runs along the guide rail. It is parallel to the car body in the open state and fits tightly with the side wall of the car body in the closed state. The main function of the load-bearing drive device is to ensure that the Sierra door can be opened and closed smoothly and reliably, while also ensuring sufficient sealing performance and safety. The Sierra door load-bearing drive device usually includes components such as a load-bearing beam, a support shaft, a load-bearing beam swing arm, and a door moving unit. The load-bearing beam is connected to the car body and is connected to the load-bearing beam swing arm through a support shaft. The latter can rotate relative to the car body. A moving unit for connecting the door frame is provided on the load-bearing beam to drive the door frame to move along the extension direction of the load-bearing beam. This design allows the Sierra door to move smoothly along the side of the car body when opening and closing, and to fit tightly to the car body when closed, thereby reducing energy loss and improving ride comfort.

[0003] According to announcement number CN111305690A, a load-bearing drive device for a vehicle Sierra door is disclosed, comprising: a frame, a motor, mounted at one end of the frame, wherein an output end of the motor is connected to a transmission part; a bracket, mounted at the middle of the frame, and the transmission part passes through the bracket; two transmission mechanisms, respectively located on both sides of the bracket, and one end of each transmission mechanism is screwed to the transmission part, and the other end of each transmission mechanism is connected to a door leaf, wherein each transmission mechanism comprises a four-bar linkage assembly, and the smoothness and sliding of the door leaf are achieved through the extension and retraction of the four-bar linkage assembly. In the above-mentioned load-bearing drive device for a vehicle Sierra door, a first trigger part is provided on the frame, and a third trigger part that is snap-fitted with the first trigger part is provided on the four-bar linkage assembly. In the above-mentioned load-bearing drive device for a vehicle Sierra door, the first trigger part is arranged in a stepped shape, namely an upper step part and a lower step part, wherein there is a smooth transition between the upper step part and the lower step part.

[0004] By adopting the above technical scheme, the transition of the four-link assembly from the extended state to the retracted state is completed through the smooth transition between the upper step portion and the lower step portion, and then the transition of the door leaf from the smooth section to the plug section is completed, thereby eliminating the height difference problem formed by the swing mechanism in the original structure to change the door leaf from the smooth section to the plug section, reducing the instantaneous resistance generated by the door leaf when opening and closing, and making the door leaf open and close more smoothly. However, in the above technical scheme, during the use of the existing vehicle plug door, the load-bearing drive device of the load-bearing drive device is usually fixed in a fixed bracket, and a cover plate is usually fixed on the surface of the fixed bracket to shield and protect the internal drive assembly. However, when the drive assembly fails, the device itself does not have the function of automatically opening the cover plate, resulting in the inability to further shorten the time for removing the cover plate, thereby indirectly affecting the efficiency of the maintenance of the drive assembly. Summary of the invention

[0005] The object of the present invention is to provide a load-bearing drive device for a vehicle plug door to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a load-bearing driving device for a vehicle plug door, comprising a fixing frame, a driving mechanism is arranged above the fixing frame, and a connecting mechanism is arranged outside the fixing frame;

[0007] The driving mechanism comprises a support frame, the bottom surface of the support frame is fixedly connected to the upper surface of the fixed frame, the inner wall of the fixed frame is movably hinged with two protective cover plates, the back of each protective cover plate is fixedly connected with an elastic pad, the back of each elastic pad is in contact with the front of the fixed frame, the inner bottom wall of the support frame is fixedly connected with a bidirectional forward and reverse motor, the output end of the bidirectional forward and reverse motor power is fixedly connected with two rotating shafts, the ends of the two rotating shafts away from each other are rotatably connected to the inner wall of the support frame, the outer surface of each rotating shaft is fixedly connected with a first gear, the outer surface of each first gear is meshed with a second gear, the inner wall of each second gear is fixedly connected with a rotating column, the outer surface of each rotating column is rotatably connected to the inner wall of the support frame, the outer surface of each rotating column is rotatably connected to two support blocks, the bottom surface of each support block is fixedly connected to the upper surface of the fixed frame, the outer surface of each rotating column is fixedly connected with a rotating frame, the bottom surface of each rotating frame is fixedly connected with two springs, and the bottom end of each group of springs is fixedly connected with a pulling block;

[0008] The connecting mechanism includes two limit frames, the back side of each limit frame is fixedly connected to the front side of the protective cover plate, the two side surfaces of the fixed frame are fixedly connected to the limit plate, the inner wall of each limit frame is fixedly connected to the first forward and reverse motor, the output end of each first forward and reverse motor power is fixedly connected to the first threaded rod, the end of each first threaded rod away from the first forward and reverse motor is rotatably connected to the inner wall of the limit frame, the outer surface of each first threaded rod is threadedly connected to a moving block, the outer surface of each moving block is slidably connected to the inner wall of the limit frame, the upper surface of each moving block is fixedly connected to a moving frame, the outer surface of each moving frame is slidably connected to the inner wall of the limit frame, and the outer surface of each moving frame is slidably connected to the inner wall of the limit plate.

[0009] Preferably, two fixing blocks are fixedly connected to the upper surface and the bottom surface of the fixing frame, and the inner wall of each fixing block is threadedly connected with a bolt.

[0010] Preferably, both side surfaces of each of the fixing blocks are fixedly connected with reinforcement blocks, and the side surfaces of each group of reinforcement blocks close to each other are respectively fixedly connected to the upper surface and the bottom surface of the fixing frame.

[0011] Preferably, a second forward and reverse motor is fixedly connected to the left side of the fixed frame, an output end of the power of the second forward and reverse motor passes through the fixed frame and extends to the inside of the fixed frame, and a second threaded rod is fixedly connected to the output end of the power of the second forward and reverse motor.

[0012] Preferably, a protective cover is fixedly connected to the outer surface of the second forward and reverse motor, and the right side of the protective cover is fixedly connected to the left side of the fixing frame.

[0013] Preferably, one end of the second threaded rod away from the second forward and reverse motor is fixedly connected to a bearing, and the outer ring of the bearing is fixedly connected to the inner wall of the fixed frame.

[0014] Preferably, a partition plate is rotatably connected to the outer surface of the second threaded rod, and the outer surface of the partition plate is fixedly connected to the inner wall of the fixed frame.

[0015] Preferably, the outer surface of the second threaded rod is threadedly connected to two driving blocks, and the outer surface of each driving block is slidably connected to the inner wall of the fixed frame.

[0016] Preferably, the inner walls of the two driving blocks are slidably connected to a limiting column, and both ends of the limiting column are fixedly connected to the inner wall of the fixing frame.

[0017] Preferably, the bottom surface of each driving block is fixedly connected to a driving frame, the outer surface of each driving frame is slidably connected to the inner wall of the fixed frame, and the inner wall of each driving frame is threadedly connected with a threaded wire.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] First, the present invention sets a bidirectional forward and reverse motor, a rotating shaft, a first gear, a second gear, a rotating column, a rotating frame, a spring and a pulling block, so that under the action of the bidirectional forward and reverse motor, the bidirectional forward and reverse motor can generate power rotation after being turned on, and the rotation of the bidirectional forward and reverse motor can drive the two rotating shafts at both ends to rotate. Under the action of the rotation of the two rotating shafts, the two first gears on the surface will be driven to rotate, and the rotation of the first gear can drive the second gear and the rotating column inside the second gear to rotate during the rotation of the first gear, so that when the rotating column rotates, the rotating frame on the surface can be driven to rotate, and the rotating frame can drive the spring and the pulling block to rotate, and then, under the action of the pulling block, it can facilitate the subsequent pulling of the protective cover to quickly open the work, and at the same time, the spring facilitates the position of the pulling block to move arbitrarily, avoiding the movement obstruction when the protective cover moves.

[0020] Second, the present invention sets a limit frame, a first forward and reverse motor, a limit plate, a movable frame, a movable block and a first threaded rod, so that under the action of the first forward and reverse motor, the first forward and reverse motor can generate power rotation after being turned on, and the rotation of the first forward and reverse motor can drive the first threaded rod on the surface to rotate. Under the action of the rotation of the first threaded rod, the movable block on the driven surface is moved, and at the same time, the movable frame on the surface is driven to move during the movement of the movable block. When the movable frame moves, one end can be pulled out of the limit plate and the other end can be moved into the interior of the pulling block, so that it is convenient to quickly complete the opening work of the protective cover plate under the cooperation with the driving mechanism, thereby further shortening the time required for the original method of disassembling the protective cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the fixing frame of the present invention;

[0022] Figure 2 It is a schematic diagram of a three-dimensional structure of a cross-section of a support frame of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of a cross-section of a fixing frame of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the protective cover plate of the present invention in cross section;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the limit frame of the present invention in section.

[0027] Wherein: 1. fixed frame; 2. driving mechanism; 201. support frame; 202. protective cover plate; 203. elastic pad; 204. bidirectional forward and reverse motor; 205. rotating shaft; 206. first gear; 207. second gear; 208. rotating column; 209. supporting block; 210. rotating frame; 211. spring; 212. pulling block; 3. connecting mechanism; 301. limiting frame; 302. limiting plate; 303. moving frame; 304. first forward and reverse motor; 305. first threaded rod; 306. moving block; 4. fixed block; 5. bolt; 6. reinforcement block; 7. protective cover; 8. second forward and reverse motor; 9. second threaded rod; 10. bearing; 11. partition plate; 12. driving block; 13. driving frame; 14. threaded wire; 15. limiting column. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1-6 , a load-bearing driving device for a vehicle plug door, comprising a fixing frame 1, a driving mechanism 2 is arranged above the fixing frame 1, and a connecting mechanism 3 is arranged outside the fixing frame 1;

[0031] The driving mechanism 2 includes a support frame 201, the bottom surface of the support frame 201 is fixedly connected to the upper surface of the fixed frame 1, the inner wall of the fixed frame 1 is movably hinged with two protective cover plates 202, the back of each protective cover plate 202 is fixedly connected to an elastic pad 203, the back of each elastic pad 203 is in contact with the front of the fixed frame 1, the inner bottom wall of the support frame 201 is fixedly connected to a bidirectional forward and reverse motor 204, the output end of the power of the bidirectional forward and reverse motor 204 is fixedly connected to two rotating shafts 205, the ends of the two rotating shafts 205 that are away from each other are rotatably connected to the inner wall of the support frame 201, and the outer surface of each rotating shaft 205 is fixedly connected to The first gear 206, the outer surface of each first gear 206 is meshedly connected with the second gear 207, the inner wall of each second gear 207 is fixedly connected with a rotating column 208, the outer surface of each rotating column 208 is rotatably connected to the inner wall of the support frame 201, the outer surface of each rotating column 208 is rotatably connected to two support blocks 209, the bottom surface of each support block 209 is fixedly connected to the upper surface of the fixed frame 1, the outer surface of each rotating column 208 is fixedly connected to a rotating frame 210, the bottom surface of each rotating frame 210 is fixedly connected to two springs 211, and the bottom end of each group of springs 211 is fixedly connected to a pull block 212.

[0032] The upper surface and the bottom surface of the fixing frame 1 are fixedly connected with two fixing blocks 4, and the inner wall of each fixing block 4 is threadedly connected with a bolt 5. By setting the fixing blocks 4 and the bolts 5, the device can be firmly fixed to avoid falling off during use.

[0033] Both side surfaces of each fixing block 4 are fixedly connected with reinforcement blocks 6, and the side surfaces of each group of reinforcement blocks 6 close to each other are respectively fixedly connected to the upper surface and the bottom surface of the fixing frame 1. By setting the reinforcement blocks 6, the firmness of the fixing blocks 4 can be further increased to avoid separation during use.

[0034] A second forward and reverse motor 8 is fixedly connected to the left side of the fixed frame 1. The output end of the power of the second forward and reverse motor 8 passes through the fixed frame 1 and extends to the interior of the fixed frame 1. The output end of the power of the second forward and reverse motor 8 is fixedly connected to a second threaded rod 9. By setting the second forward and reverse motor 8 and the second threaded rod 9, the power required for opening and closing the Sierra door can be provided, thereby quickly performing the moving opening and closing operations.

[0035] A protective cover 7 is fixedly connected to the outer surface of the second forward and reverse motor 8, and the right side of the protective cover 7 is fixedly connected to the left side of the fixed frame 1. By providing the protective cover 7, the stability effect of the second forward and reverse motor 8 can be further increased, and at the same time it can also play a certain protective role.

[0036] The end of the second threaded rod 9 away from the second forward and reverse motor 8 is fixedly connected with a bearing 10, and the outer ring of the bearing 10 is fixedly connected to the inner wall of the fixed frame 1. By setting the bearing 10, the smoothness of the second threaded rod 9 during rotation can be increased, so that the friction during rotation can be reduced.

[0037] The specific implementation method of this embodiment is as follows: first, the staff turns on the bidirectional forward and reverse motor 204. After the bidirectional forward and reverse motor 204 is turned on, it can generate power rotation. The rotation of the bidirectional forward and reverse motor 204 can drive the two rotating shafts 205 at both ends to rotate. Under the action of the rotation of the two rotating shafts 205, the two first gears 206 on the surface will be driven to rotate. Then, during the rotation of the first gear 206, the second gear 207 and the rotating column 208 inside the second gear 207 can be driven to rotate, so that when the rotating column 208 rotates, the rotating frame 210 on the surface can be driven to rotate. Finally, the rotating frame 210 can drive the spring 211 and the pull block 212 to rotate, and then under the action of the pull block 212, it can facilitate the subsequent pulling of the protective cover 202 for quick opening, and can provide the power required for opening the protective cover 202. At the same time, the spring 211 facilitates the position of the pull block 212 to move arbitrarily, avoiding movement obstruction when the protective cover 202 moves.

[0038] Embodiment 2

[0039] See also Figure 1-6 The connecting mechanism 3 includes two limit frames 301, the back side of each limit frame 301 is fixedly connected to the front side of the protective cover plate 202, the two side surfaces of the fixed frame 1 are fixedly connected to the limit plate 302, the inner wall of each limit frame 301 is fixedly connected to the first forward and reverse motor 304, the output end of the power of each first forward and reverse motor 304 is fixedly connected to the first threaded rod 305, and the end of each first threaded rod 305 away from the first forward and reverse motor 304 is rotatably connected to the inner wall of the limit frame 301, the outer surface of each first threaded rod 305 is threadedly connected to a moving block 306, the outer surface of each moving block 306 is slidably connected to the inner wall of the limit frame 301, and the upper surface of each moving block 306 is fixedly connected to a moving frame 303, the outer surface of each moving frame 303 is slidably connected to the inner wall of the limit frame 301, and the outer surface of each moving frame 303 is slidably connected to the inner wall of the limit plate 302.

[0040] The outer surface of the second threaded rod 9 is rotatably connected to a partition plate 11, and the outer surface of the partition plate 11 is fixedly connected to the inner wall of the fixed frame 1. By setting the partition plate 11, the interior of the fixed frame 1 can be separated, and a certain limiting effect can be added to the components of the inner wall.

[0041] The outer surface of the second threaded rod 9 is threadedly connected to two drive blocks 12, and the outer surface of each drive block 12 is slidably connected to the inner wall of the fixed frame 1. By setting the drive block 12, the plug door can be easily moved by pulling the drive block 12, thereby quickly completing the switching work.

[0042] The inner walls of the two driving blocks 12 are slidably connected to the limiting column 15, and both ends of the limiting column 15 are fixedly connected to the inner wall of the fixed frame 1. By setting the limiting column 15, the stability effect of the driving block 12 during movement can be further increased, allowing it to move more smoothly.

[0043] The bottom surface of each driving block 12 is fixedly connected to a driving frame 13, the outer surface of each driving frame 13 is slidably connected to the inner wall of the fixed frame 1, and the inner wall of each driving frame 13 is threadedly connected to a threaded wire 14. By setting the driving frame 13 and the threaded wire 14, it can be conveniently connected to the top component of the sliding door, and then the sliding door can be conveniently pulled to move.

[0044] The specific implementation method of this embodiment is as follows: first, when the protective cover 202 needs to be opened for maintenance, the staff turns on the first forward and reverse motor 304. After the first forward and reverse motor 304 is turned on, it can generate power rotation. The rotation of the first forward and reverse motor 304 can drive the first threaded rod 305 on the surface to rotate. Under the action of the rotation of the first threaded rod 305, the moving block 306 of the driving surface is moved. At the same time, in the process of the movement of the moving block 306, the moving frame 303 on the surface is driven to move. When the moving frame 303 moves, one end can be pulled out from the limiting plate 302 and the other end can be moved into the interior of the pull block 212, so that it is convenient to quickly complete the opening work of the protective cover 202 in cooperation with the driving mechanism 2.

[0045] The working principle of the present invention is as follows: first, the staff fixes the device firmly with bolts 5, and then firmly connects it to the Sierra door with the threaded wire 14 at the bottom, and then the second forward and reverse motor 8 can be turned on, and the rotation of the second forward and reverse motor 8 can drive the second threaded rod 9 to rotate, and the rotation of the second threaded rod 9 can drive the two driving blocks 12 on the surface to move, and the movement of the driving block 12 can drive the driving frame 13 and the Sierra door below to move, and then can drive the Sierra door to open and close. When there is a problem with the driving component of the Sierra door and the protective cover 202 needs to be opened, the staff immediately turns on the first forward and reverse motor 304. After the first forward and reverse motor 304 is turned on, it can generate power rotation. The rotation of the first forward and reverse motor 304 can drive the first threaded rod 305 on the surface to rotate. Under the action of the rotation of the first threaded rod 305, the moving block 306 on the driving surface is moved, and at the same time, in the process of the moving block 306 moving, it will drive the moving frame 303 on the surface to move, and when the moving frame 303 moves, it can The two ends of the two-way forward and reverse motor 204 can be pulled out from the limit plate 302 and the other end can be moved into the interior of the pull block 212. Then the staff starts the two-way forward and reverse motor 204 at the same time. After the two-way forward and reverse motor 204 is turned on, it can generate power rotation. The rotation of the two-way forward and reverse motor 204 can drive the two rotating shafts 205 at both ends to rotate. Under the action of the rotation of the two rotating shafts 205, the two first gears 206 on the surface will be driven to rotate. Then, during the rotation of the first gear 206, the second gear 207 and the rotating column 208 inside the second gear 207 can be driven to rotate, so that when the rotating column 208 rotates, the rotating frame 210 on the surface can be driven to rotate. Finally, the rotating frame 210 can drive the spring 211 and the pull block 212 to rotate, and then under the action of the pull block 212, the protective cover 202 can be pulled to open quickly. At the same time, the spring 211 facilitates the position of the pull block 212 to move arbitrarily, avoiding movement obstruction when the protective cover 202 moves.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. 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 load-bearing driving device for a vehicle plug door, comprising a fixing frame (1), characterized in that: A driving mechanism (2) is arranged above the fixing frame (1), and a connecting mechanism (3) is arranged outside the fixing frame (1); The driving mechanism (2) comprises a support frame (201), the bottom surface of the support frame (201) is fixedly connected to the upper surface of the fixed frame (1), the inner wall of the fixed frame (1) is movably hinged with two protective cover plates (202), the back surface of each protective cover plate (202) is fixedly connected to an elastic pad (203), the back surface of each elastic pad (203) is in contact with the front surface of the fixed frame (1), the inner bottom wall of the support frame (201) is fixedly connected to a bidirectional forward and reverse motor (204), the output end of the power of the bidirectional forward and reverse motor (204) is fixedly connected to two rotating shafts (205), the ends of the two rotating shafts (205) that are away from each other are rotatably connected to the inner wall of the support frame (201), and the outer surface of each rotating shaft (205) is fixedly connected to There is a first gear (206), the outer surface of each of the first gears (206) is meshedly connected with a second gear (207), the inner wall of each of the second gears (207) is fixedly connected with a rotating column (208), the outer surface of each of the rotating columns (208) is rotatably connected to the inner wall of the support frame (201), the outer surface of each of the rotating columns (208) is rotatably connected to two supporting blocks (209), the bottom surface of each of the supporting blocks (209) is fixedly connected to the upper surface of the fixed frame (1), the outer surface of each of the rotating columns (208) is fixedly connected to a rotating frame (210), the bottom surface of each of the rotating frames (210) is fixedly connected to two springs (211), and the bottom end of each group of the springs (211) is fixedly connected to a pulling block (212); The connection mechanism (3) comprises two limit frames (301), the back side of each limit frame (301) is fixedly connected to the front side of the protective cover plate (202), the two side surfaces of the fixed frame (1) are fixedly connected to the limit plates (302), the inner wall of each limit frame (301) is fixedly connected to a first forward and reverse motor (304), the output end of the power of each first forward and reverse motor (304) is fixedly connected to a first threaded rod (305), and each first threaded rod (305) is away from the first forward and reverse motor (304). One end is rotatably connected to the inner wall of the limit frame (301), the outer surface of each of the first threaded rods (305) is threadedly connected to a moving block (306), the outer surface of each of the moving blocks (306) is slidably connected to the inner wall of the limit frame (301), the upper surface of each of the moving blocks (306) is fixedly connected to a moving frame (303), the outer surface of each of the moving frames (303) is slidably connected to the inner wall of the limit frame (301), and the outer surface of each of the moving frames (303) is slidably connected to the inner wall of the limit plate (302).

2. A load-bearing driving device for a vehicle plug door according to claim 1, characterized in that: Two fixing blocks (4) are fixedly connected to the upper surface and the bottom surface of the fixing frame (1), and the inner wall of each fixing block (4) is threadedly connected to a bolt (5).

3. A load-bearing driving device for a vehicle plug door according to claim 2, characterized in that: Both side surfaces of each of the fixing blocks (4) are fixedly connected to reinforcement blocks (6), and the side surfaces of each group of the reinforcement blocks (6) that are close to each other are respectively fixedly connected to the upper surface and the bottom surface of the fixing frame (1).

4. A load-bearing driving device for a vehicle plug door according to claim 1, characterized in that: A second forward and reverse motor (8) is fixedly connected to the left side of the fixed frame (1); an output end of the power of the second forward and reverse motor (8) passes through the fixed frame (1) and extends into the interior of the fixed frame (1); and a second threaded rod (9) is fixedly connected to the output end of the power of the second forward and reverse motor (8).

5. A load-bearing driving device for a vehicle plug door according to claim 4, characterized in that: A protective cover (7) is fixedly connected to the outer surface of the second forward and reverse motor (8), and the right side of the protective cover (7) is fixedly connected to the left side of the fixed frame (1).

6. A load-bearing driving device for a vehicle plug door according to claim 4, characterized in that: A bearing (10) is fixedly connected to one end of the second threaded rod (9) away from the second forward and reverse motor (8), and an outer ring of the bearing (10) is fixedly connected to the inner wall of the fixed frame (1).

7. A load-bearing driving device for a vehicle plug door according to claim 4, characterized in that: The outer surface of the second threaded rod (9) is rotatably connected to a partition plate (11), and the outer surface of the partition plate (11) is fixedly connected to the inner wall of the fixed frame (1).

8. The load-bearing driving device for a vehicle plug door according to claim 4, characterized in that: The outer surface of the second threaded rod (9) is threadedly connected to two driving blocks (12), and the outer surface of each driving block (12) is slidably connected to the inner wall of the fixed frame (1).

9. A load-bearing driving device for a vehicle plug door according to claim 8, characterized in that: The inner walls of the two driving blocks (12) are slidably connected to a limiting column (15), and both ends of the limiting column (15) are fixedly connected to the inner wall of the fixed frame (1).

10. The load-bearing driving device for a vehicle plug door according to claim 8, characterized in that: The bottom surface of each driving block (12) is fixedly connected to a driving frame (13), the outer surface of each driving frame (13) is slidably connected to the inner wall of the fixed frame (1), and the inner wall of each driving frame (13) is threadedly connected to a threaded wire (14).

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