Driving mechanism of telescopic conveyor

Abstract

The utility model discloses a driving mechanism of a telescopic conveyor. The driving mechanism comprises a fixed section, a telescopic section, a first driving assembly and a second driving assembly. The telescopic section comprises a first telescopic joint, a second telescopic joint, a third telescopic joint and a fourth telescopic joint which are sequentially connected in a nested manner, and the first telescopic joint closest to the fixed section is nested on the fixed section; the first driving assembly is arranged between the fixed section and the telescopic section and is used for driving the first telescopic section to telescopically move relative to the fixed section; the second driving assembly is arranged on the telescopic section and used for driving the second telescopic joint, the third telescopic joint and the fourth telescopic joint to synchronously stretch and retract relative to the first telescopic joint. And the first driving assembly runs earlier than the second driving assembly, so that after the first telescopic joint completely stretches out or retracts, the second telescopic joint, the third telescopic joint and the fourth telescopic joint synchronously stretch out and draw back. The utility model not only has a smaller structure, but also enables the telescopic action of the conveyor to be more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics transportation, in particular to a driving mechanism of a telescopic conveyor. Background Art

[0002] In the process of cargo handling and transportation, great flexibility is required, and the handling and transportation time is short and the efficiency is high. Therefore, telescopic conveyors (referred to as telescopic conveyors) came into being. By adding a telescopic mechanism to an ordinary conveyor, the conveyor can be freely extended and retracted in the length direction, thereby meeting various handling needs. However, the existing telescopic conveyor has a complex driving mechanism structure, occupies a large space, and during the driving process, the instantaneous start and stop impact force is large, which makes it difficult for the telescopic action to run smoothly. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a driving mechanism for a telescopic conveyor, which not only has a more compact structure but also makes the telescopic action of the conveyor more stable.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a driving mechanism of a telescopic conveyor, comprising

[0005] Fixed segment;

[0006] A telescopic section, comprising a first telescopic section, a second telescopic section, a third telescopic section, and a fourth telescopic section which are nested in sequence, and the first telescopic section closest to the fixed section is nested on the fixed section;

[0007] A first driving assembly is arranged between the fixed section and the telescopic section, and is used to drive the first telescopic section to telescopically move relative to the fixed section;

[0008] A second driving assembly is arranged on the telescopic section, and is used to drive the second telescopic section, the third telescopic section, and the fourth telescopic section to move synchronously with respect to the first telescopic section;

[0009] The first drive assembly operates before the second drive assembly, so that after the first telescopic section is fully extended or retracted, the second telescopic section, the third telescopic section, and the fourth telescopic section perform synchronous telescopic movement.

[0010] First, the first telescopic section is driven to telescopically move relative to the fixed section by the first driving component. At this time, the second telescopic section, the third telescopic section, and the fourth telescopic section remain relatively stationary relative to the first telescopic section, and the fixed section only needs to stably support the telescopic movement of the first telescopic section; when the first telescopic section is fully extended or retracted, the first telescopic section and the fixed section remain relatively stationary, and then the second telescopic section, the third telescopic section, and the fourth telescopic section are driven to telescopically move simultaneously by the second driving component. At this time, the fixed section and the first telescopic section jointly support the telescopic movement of the second telescopic section, the third telescopic section, and the fourth telescopic section.

[0011] The beneficial effects of the driving mechanism of the telescopic conveyor of the utility model are:

[0012] Through the cooperation of the first drive assembly and the second drive assembly, the telescopic movement of the telescopic section is divided into two sections (the individual telescopic movement of the first telescopic section and the synchronous telescopic movement of the remaining telescopic sections), thereby reducing the driving force required by a single drive assembly (the first drive assembly and the second drive assembly); at the same time, during the first section of telescopic movement, the remaining telescopic sections except the first telescopic section remain stationary, avoiding the support force required for the simultaneous telescopic movement of multiple telescopic sections, thereby improving the telescopic stability of the first telescopic section; and during the second section of telescopic movement, the first telescopic section is stationary, so the first telescopic section can jointly provide the support force required by the remaining telescopic sections with the fixed section (equivalent to increasing the weight of the fixed part of the equipment), thereby improving the telescopic stability of all the remaining telescopic sections. In addition, the first drive assembly and the second drive assembly are arranged at different positions, which can facilitate the compact design of the overall structure to a certain extent.

[0013] Further, the second driving assembly includes a second telescopic transmission part, a third telescopic transmission part, and a fourth telescopic transmission part, which are arranged one-to-one corresponding to the second telescopic section, the third telescopic section, and the fourth telescopic section;

[0014] The second telescopic transmission part includes a second front sprocket, a second rear sprocket, a second chain, and a second connecting part. The second front sprocket and the second rear sprocket are respectively arranged at the front and rear ends of the first telescopic joint. The second chain is arranged on the second front sprocket and the second rear sprocket in a closed loop. The second connecting part is used to connect the second telescopic joint to the second chain.

[0015] The third telescopic transmission part comprises a third front sprocket, a third rear sprocket, a third extension chain, and a third retraction chain, wherein the third front sprocket and the third rear sprocket are arranged at the front and rear ends of the second telescopic joint; one end of the third extension chain is fixedly connected to the third telescopic joint, and the other end is fixedly connected to the rear end of the first telescopic joint after passing through the third front sprocket; one end of the third retraction chain is fixedly connected to the third telescopic joint, and the other end is fixedly connected to the front end of the first telescopic joint after passing through the third rear sprocket;

[0016] The fourth telescopic transmission part has the same structure as the third telescopic transmission part, and is used to drive the fourth telescopic section to perform telescopic movement relative to the third telescopic section.

[0017] Furthermore, the second driving assembly further includes a second driving member, which is installed at the rear end of the first telescopic joint to drive the second rear sprocket to rotate.

[0018] When the second driving member drives the second rear sprocket to rotate, the second chain is transmitted and drives the second front sprocket to rotate, and the second connecting part moves with the second chain and drives the second telescopic joint to telescopically move relative to the first telescopic joint; when the second telescopic joint is extended, the third front sprocket and the third rear sprocket move synchronously in the extending direction. At this time, the third front sprocket can push the third extending chain transmission, thereby driving the third telescopic joint to extend relative to the second telescopic joint; when the second telescopic joint is retracted, the third front sprocket and the third rear sprocket move synchronously in the retracting direction. At this time, the third rear sprocket can push the third retracting chain transmission, thereby driving the third telescopic joint to retract relative to the second telescopic joint; similarly, the fourth telescopic transmission part can drive the fourth telescopic joint to telescopically move relative to the third telescopic joint.

[0019] Specifically, the second driving member includes a second driving motor, a second main driving wheel, a second secondary driving wheel and a second driving chain, the second main driving wheel and the second secondary driving wheel are both wound with a second driving chain in a closed loop, the second driving motor is coaxially connected to the second main driving wheel, and the second secondary driving wheel is coaxially connected to the second rear sprocket. The second main driving wheel, the second secondary driving wheel and the second driving chain can improve the rotation stability of the second rear sprocket.

[0020] Furthermore, the second connection part includes a second front plate and a second rear plate for use together. The second rear plate is fixedly connected to the rear end of the second telescopic section and is fixedly connected to the second chain through a chain pull block. The second front plate is fixedly connected to the lower end of the second telescopic section and is fixedly connected to the second chain through a chain pull block. The cooperation of the second front plate and the second rear plate can enhance the connection strength between the second chain and the second telescopic section, thereby improving the stability of the telescopic movement of the second telescopic section.

[0021] Furthermore, the second rear plate is provided with a through hole for the third extended chain to pass through, so that the installation between the third telescopic transmission part and the second telescopic transmission part is more compact, which is beneficial to reducing the overall structure of the second driving assembly.

[0022] Furthermore, the second telescopic transmission part, the third telescopic transmission part, and the fourth telescopic transmission part are all located on the same side of the telescopic section.

[0023] Further, the first drive assembly includes a first drive member, a first front sprocket, a first rear sprocket, a first chain, and a first connecting portion. The first front sprocket and the first rear sprocket are respectively arranged at the front and rear ends of the fixed section. The first chain is arranged on the first front sprocket and the first rear sprocket in a closed loop. The first connecting portion is fixed to the first chain and connected to the first telescopic joint. The first drive member is connected to the first rear sprocket to drive the first rear sprocket to rotate.

[0024] When the first driving member drives the first rear sprocket to rotate, the first chain is driven to rotate the first front sprocket, and the first connecting portion then drives the first telescopic section to telescopically move relative to the fixed section.

[0025] Furthermore, the front ends of the fixed section, the first telescopic section, the second telescopic section, and the third telescopic section are all provided with nesting openings, and the nesting openings are inclined from top to bottom in the extending direction of the telescopic section, so as to better support the telescopic section nested therein.

[0026] Furthermore, the fixed section, the first telescopic section, the second telescopic section, and the third telescopic section are all provided with supporting wheel sets near the nesting opening, so as to facilitate the telescopic movement of the telescopic section nested therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the telescopic conveyor according to an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the driving mechanism of the embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the fixed section of an embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the first driving assembly of an embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the second drive assembly of an embodiment of the utility model;

[0032] Figure 6 for Figure 5 A partial enlarged view of the middle A area;

[0033] Figure 7 This is a schematic diagram of the structure of the second telescopic transmission part of the embodiment of the utility model;

[0034] Figure 8 It is a schematic structural diagram of the third telescopic transmission part of an embodiment of the utility model.

[0035] In the figure:

[0036] 1-Fixed segment;

[0037] 2- telescopic section; 21- first telescopic section; 22- second telescopic section; 23- third telescopic section; 24- fourth telescopic section;

[0038] 3-first drive assembly; 31-first drive member; 32-first front sprocket; 33-first rear sprocket; 34-first chain; 35-first connecting portion;

[0039] 4-second drive assembly; 41-second drive member; 42-second telescopic transmission part; 421-second front sprocket; 422-second rear sprocket; 423-second chain; 424-second connecting part; 4241-second front plate; 4242-second rear plate; 4243-chain pull block; 43-third telescopic transmission part; 431-third front sprocket; 432-third rear sprocket; 433-third extending chain; 434-third retracting chain; 44-fourth telescopic transmission part;

[0040] 5-Nesting opening;

[0041] 6-Support wheel set;

[0042] 7-Through hole. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0044] Example

[0045] See attached Figure 1-2 As shown, a driving mechanism of a telescopic conveyor of the utility model comprises a fixed section 1, a telescopic section 2, a first driving assembly 3, and a second driving assembly 4, wherein the telescopic section 2 comprises a first telescopic section 21, a second telescopic section 22, a third telescopic section 23, and a fourth telescopic section 24 which are nested and connected in sequence, and the first telescopic section 21 closest to the fixed section 1 is nested on the fixed section 1. The first driving assembly 3 is arranged between the fixed section 1 and the telescopic section 2 to drive the telescopic movement of the first telescopic section 21 relative to the fixed section 1. The second driving assembly 4 is arranged on the telescopic section 2 to drive the synchronous telescopic movement of the second telescopic section 22, the third telescopic section 23, and the fourth telescopic section 24 relative to the first telescopic section 21. And the first driving assembly 3 operates before the second driving assembly 4, so that after the first telescopic section 21 is fully extended or retracted, the second telescopic section 22, the third telescopic section 23, and the fourth telescopic section 24 perform synchronous telescopic movement.

[0046] It should be noted that, taking the fixed section 1 and the first telescopic section 21 as an example, the nested connection means that the rear end of the first telescopic section 21 is embedded in the front end of the fixed section 1. The front end of the telescopic section 2 refers to the extended end, and the rear end of the telescopic section refers to the retracted end. For the fixed section 1, the end where the first telescopic section 21 is embedded is the front end, and the other end is the rear end.

[0047] First, the first telescopic section 21 is driven by the first driving component 3 to perform telescopic movement relative to the fixed section 1. At this time, the second telescopic section 22, the third telescopic section 23, and the fourth telescopic section 24 remain relatively stationary relative to the first telescopic section 21, and the fixed section 1 only needs to stably support the telescopic movement of the first telescopic section 21; when the first telescopic section 21 is fully extended or retracted, the first telescopic section 21 and the fixed section 1 remain relatively stationary, and then the second telescopic section 22, the third telescopic section 23, and the fourth telescopic section 24 are driven by the second driving component 4 to perform telescopic movement at the same time. At this time, the fixed section 1 and the first telescopic section 21 can jointly support the telescopic movement of the second telescopic section 22, the third telescopic section 23, and the fourth telescopic section 24.

[0048] Through the cooperation of the first drive component 3 and the second drive component 4, the telescopic movement of the telescopic section 2 is divided into two sections (the separate telescopic movement of the first telescopic section and the synchronous telescopic movement of the remaining telescopic sections), thereby reducing the driving force required by a single drive component (the first drive component, the second drive component); at the same time, during the first section of telescopic movement, the remaining telescopic sections except the first telescopic section 21 remain stationary, avoiding the supporting force required for the simultaneous telescopic movement of multiple telescopic sections, thereby improving the telescopic stability of the first telescopic section 21; and during the second section of telescopic movement, the first telescopic section 21 is stationary, therefore, the first telescopic section 21 can jointly provide the supporting force required by the remaining telescopic sections with the fixed section 1 (equivalent to increasing the weight of the fixed part of the equipment), thereby improving the telescopic stability of all remaining telescopic sections.

[0049] In some embodiments, see Appendix Figure 3 As shown, the front ends of the fixed section 1, the first telescopic section 21, the second telescopic section 22, and the third telescopic section 23 are all provided with nesting openings 5, and the nesting openings 5 ​​are inclined from top to bottom in the extension direction of the telescopic section 2. The fixed section 1, the first telescopic section 21, the second telescopic section 22, and the third telescopic section 23 are all provided with support wheel groups 6 near the nesting openings 5 ​​to facilitate the telescopic movement of the telescopic sections nested therein. It should be noted that the structures of the fixed section 1 and the telescopic section 2 can refer to the telescopic conveyor in the prior art, and the following description focuses on the structures and driving principles of the first drive assembly 3 and the second drive assembly 4.

[0050] In some embodiments, see Appendix Figure 4As shown, the first driving assembly 3 includes a first driving member 31, a first front sprocket 32, a first rear sprocket 33, a first chain 34, and a first connecting portion 35. The first front sprocket 32 ​​and the first rear sprocket 33 are arranged at the front and rear ends of the fixed section 1, respectively. The first chain 34 is arranged on the first front sprocket 32 ​​and the first rear sprocket 33 in a closed loop. The first connecting portion 35 is fixed to the first chain 34 and connected to the first telescopic joint 21. The first driving member 31 is connected to the first rear sprocket 33 to drive the first rear sprocket 33 to rotate. When the first driving member 31 drives the first rear sprocket 33 to rotate, the first chain 34 drives and drives the first front sprocket 32 ​​to rotate, and the first connecting portion 35 then drives the first telescopic joint 21 to telescopically move relative to the fixed section 1.

[0051] Specifically, the first driving member 31 is installed at the rear end of the fixed section 1, and includes a first driving motor, a first main driving wheel, a first secondary driving wheel and a first driving chain. The first main driving wheel and the first secondary driving wheel are both wound with a first driving chain in a closed loop, the first driving motor is coaxially connected to the first main driving wheel, and the first secondary driving wheel is coaxially connected to the first rear sprocket 33.

[0052] In some embodiments, see Appendix Figure 5-8 As shown, the second drive assembly 4 includes a second drive member 41, and a second telescopic transmission part 42, a third telescopic transmission part 43, and a fourth telescopic transmission part 44 which are arranged one by one corresponding to the second telescopic section 22, the third telescopic section 23, and the fourth telescopic section 24. The second telescopic transmission part 42, the third telescopic transmission part 43, and the fourth telescopic transmission part 44 are all located on the same side of the telescopic section 2.

[0053] See attached Figure 6-7 As shown, the structure of the second telescopic transmission part 42 is substantially the same as that of the first driving component, and includes a second front sprocket 421, a second rear sprocket 422, a second chain 423, and a second connecting part 424. The second front sprocket 421 and the second rear sprocket 422 are respectively arranged at the front and rear ends of the first telescopic section 21, the second chain 423 is arranged in a closed loop on the second front sprocket 421 and the second rear sprocket 422, and the second connecting part 424 is used to connect the second telescopic section 22 to the second chain 423.

[0054] See attached Figure 8As shown, the third telescopic transmission part 43 includes a third front sprocket 431, a third rear sprocket 432, a third extending chain 433, and a third retracting chain 434. The third front sprocket 431 and the third rear sprocket 432 are arranged at the front and rear ends of the second telescopic joint 22; one end of the third extending chain 433 is fixedly connected to the third telescopic joint 23, and the other end is fixedly connected to the rear end of the first telescopic joint 21 after bypassing the third front sprocket 431; one end of the third retracting chain 434 is fixedly connected to the third telescopic joint 23, and the other end is fixedly connected to the front end of the first telescopic joint 21 after bypassing the third rear sprocket 432.

[0055] The fourth telescopic transmission part 44 has the same structure as the third telescopic transmission part 43, including a fourth front sprocket, a fourth rear sprocket, a fourth extending chain, and a fourth retracting chain. The fourth front sprocket and the fourth rear sprocket are arranged at the front and rear ends of the third telescopic joint 23; one end of the fourth extending chain is fixedly connected to the fourth telescopic joint 24, and the other end is fixedly connected to the rear end of the second telescopic joint 22 after bypassing the fourth front sprocket; one end of the fourth retracting chain is fixedly connected to the fourth telescopic joint 24, and the other end is fixedly connected to the front end of the second telescopic joint 22 after bypassing the fourth rear sprocket.

[0056] The second driving member 41 is installed at the rear end of the first telescopic joint 21 to drive the second rear sprocket 422 to rotate.

[0057] When the second driving member 41 drives the second rear sprocket 422 to rotate, the second chain 423 is driven to drive the second front sprocket 421 to rotate, and the second connecting portion 424 moves with the second chain 423 and drives the second telescopic section 22 to telescopically move relative to the first telescopic section 21;

[0058] When the second telescopic section 22 is extended, the third front sprocket 431 and the third rear sprocket 432 move synchronously in the extending direction. At this time, the third front sprocket 431 can drive the third extension chain 433 to drive, thereby driving the third telescopic section 23 to extend relative to the second telescopic section 22. Similarly, when the third telescopic section 23 is extended, the fourth front sprocket drives the fourth extension chain to drive, thereby driving the fourth telescopic section 24 to extend relative to the third telescopic section 23.

[0059] When the second telescopic section 22 retracts, the third front sprocket 431 and the third rear sprocket 432 move synchronously in the retraction direction. At this time, the third rear sprocket 432 can push the third retraction chain 434 to drive, thereby driving the third telescopic section 23 to retract relative to the second telescopic section 22; similarly, when the third telescopic section 23 retracts, the fourth rear sprocket pushes the fourth retraction chain to drive, thereby driving the fourth telescopic section 24 to retract relative to the third telescopic section 23.

[0060] In some embodiments, the second driving member 41 includes a second driving motor, a second main driving wheel, a second secondary driving wheel and a second driving chain, a second driving chain in a closed loop is wound around the second main driving wheel and the second secondary driving wheel, the second driving motor is coaxially connected to the second main driving wheel, and the second secondary driving wheel is coaxially connected to the second rear sprocket 422. The second main driving wheel, the second secondary driving wheel and the second driving chain can improve the rotation stability of the second rear sprocket.

[0061] In some embodiments, see Appendix Figure 6 As shown, the second connecting portion 424 includes a second front plate 4241 and a second rear plate 4242 used in conjunction with each other. The second rear plate 4242 is fixedly connected to the rear end of the second telescopic section 22 and is fixedly connected to the second chain 423 through a chain pull block 4243. The second front plate 4241 is fixedly connected to the lower end of the second telescopic section 22 and is fixedly connected to the second chain 423 through a chain pull block 4243. The cooperation of the second front plate 4241 and the second rear plate 4241 can enhance the connection strength between the second chain 423 and the second telescopic section 21, thereby improving the stability of the telescopic movement of the second telescopic section 21.

[0062] Furthermore, in order to make the drive mechanism more compact, in some embodiments, see the attached Figure 6 As shown, the second rear plate 4242 is provided with a through hole 7 for the third extended chain 433 to pass through, so as to make the installation between the third telescopic transmission part 43 and the second telescopic transmission part 42 more compact, which is conducive to reducing the overall structure of the second driving assembly 4.

[0063] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A driving mechanism for a telescopic conveyor, characterized in that: include Fixed segment; A telescopic section, comprising a first telescopic section, a second telescopic section, a third telescopic section, and a fourth telescopic section which are nested in sequence, and the first telescopic section closest to the fixed section is nested on the fixed section; A first driving assembly is arranged between the fixed section and the telescopic section, and is used to drive the first telescopic section to telescopically move relative to the fixed section; A second driving assembly is arranged on the telescopic section, and is used to drive the second telescopic section, the third telescopic section, and the fourth telescopic section to move synchronously with respect to the first telescopic section; The first drive assembly operates before the second drive assembly, so that after the first telescopic section is fully extended or retracted, the second telescopic section, the third telescopic section, and the fourth telescopic section perform synchronous telescopic movement.

2. The driving mechanism according to claim 1, characterized in that: The second driving assembly includes a second telescopic transmission part, a third telescopic transmission part, and a fourth telescopic transmission part which are arranged one-to-one corresponding to the second telescopic section, the third telescopic section, and the fourth telescopic section; The second telescopic transmission part includes a second front sprocket, a second rear sprocket, a second chain, and a second connecting part. The second front sprocket and the second rear sprocket are respectively arranged at the front and rear ends of the first telescopic joint. The second chain is arranged on the second front sprocket and the second rear sprocket in a closed loop. The second connecting part is used to connect the second telescopic joint to the second chain. The third telescopic transmission part comprises a third front sprocket, a third rear sprocket, a third extension chain, and a third retraction chain, wherein the third front sprocket and the third rear sprocket are arranged at the front and rear ends of the second telescopic joint; one end of the third extension chain is fixedly connected to the third telescopic joint, and the other end is fixedly connected to the rear end of the first telescopic joint after passing through the third front sprocket; one end of the third retraction chain is fixedly connected to the third telescopic joint, and the other end is fixedly connected to the front end of the first telescopic joint after passing through the third rear sprocket; The fourth telescopic transmission part has the same structure as the third telescopic transmission part, and is used to drive the fourth telescopic section to perform telescopic movement relative to the third telescopic section.

3. The driving mechanism according to claim 2, characterized in that: The second driving assembly also includes a second driving member, which is installed at the rear end of the first telescopic joint to drive the second rear sprocket to rotate.

4. The driving mechanism according to claim 3, characterized in that: The second driving member includes a second driving motor, a second main driving wheel, a second slave driving wheel and a second driving chain. A second driving chain in a closed loop is wound around the second main driving wheel and the second slave driving wheel. The second driving motor is coaxially connected to the second main driving wheel, and the second slave driving wheel is coaxially connected to the second rear sprocket.

5. The driving mechanism according to claim 2, characterized in that: The second connecting part includes a second front plate and a second rear plate used together. The second rear plate is fixedly connected to the rear end of the second telescopic section and is fixedly connected to the second chain through a chain pull block; the second front plate is fixedly connected to the lower end of the second telescopic section and is fixedly connected to the second chain through a chain pull block.

6. The driving mechanism according to claim 5, characterized in that: The second rear plate is provided with a through hole for the third extended chain to pass through.

7. The driving mechanism according to claim 2, characterized in that: The second telescopic transmission part, the third telescopic transmission part, and the fourth telescopic transmission part are all located on the same side of the telescopic section.

8. The driving mechanism according to claim 1, characterized in that: The first driving assembly includes a first driving member, a first front sprocket, a first rear sprocket, a first chain, and a first connecting portion. The first front sprocket and the first rear sprocket are respectively arranged at the front and rear ends of the fixed section. The first chain is arranged on the first front sprocket and the first rear sprocket in a closed loop. The first connecting portion is fixed to the first chain and connected to the first telescopic joint. The first driving member is connected to the first rear sprocket to drive the first rear sprocket to rotate.

9. The driving mechanism according to claim 1, characterized in that: The front ends of the fixed section, the first telescopic section, the second telescopic section and the third telescopic section are all provided with nesting openings, and the nesting openings are inclined from top to bottom in the extending direction of the telescopic section.

10. The driving mechanism according to claim 9, characterized in that: The fixed section, the first telescopic joint, the second telescopic joint, and the third telescopic joint are all provided with supporting wheel sets near the nesting opening.

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