Auxiliary work vehicle

Abstract

This disclosure relates to an auxiliary work vehicle, comprising a main body and a warning flag mounting part; the main body includes a vehicle body and wheels, the vehicle body having a receiving cavity, and the wheels and the vehicle body being rotatably connected; the warning flag mounting part is disposed on the vehicle body and rotatably connected to the vehicle body; the auxiliary work vehicle includes a first state and a second state, in the first state, the auxiliary work vehicle is performing operations, and the warning flag mounting part is in a first position, extending out of the receiving cavity; in the second state, the auxiliary work vehicle stops operating, and the warning flag mounting part is in a second position, retracting into the receiving cavity. Thus, it can assist in providing work warnings.

Description

Technical Field

[0001] This disclosure relates to the field of aviation fuel refueling, and in particular to an auxiliary work vehicle. Background Technology

[0002] Currently, aviation fuel refueling is done using a one-person-one-vehicle method, which means that one person drives the aviation fuel refueling vehicle to the designated position on the side of the wing and parks it, and then this person completes the refueling of the aircraft.

[0003] During this process, the work area needs to be marked with warnings, usually by the staff member setting up warning flags. Due to the relatively desolate work environment, setting up warning flags is difficult. Summary of the Invention

[0004] The purpose of this disclosure is to provide an auxiliary work vehicle that can assist in providing work warnings.

[0005] This disclosure provides an auxiliary work vehicle, including a main vehicle and a warning flag mounting part; the main vehicle includes a body and wheels, the body has a receiving cavity, and the wheels and the body are rotatably connected; the warning flag mounting part is disposed on the body and rotatably connected to the body; the auxiliary work vehicle includes a first state and a second state, in the first state, the auxiliary work vehicle performs work, the warning flag mounting part is located in a first position and extends out of the receiving cavity; in the second state, the auxiliary work vehicle stops working, the warning flag mounting part is located in a second position and is received into the receiving cavity.

[0006] In one embodiment, the auxiliary work vehicle includes an installation limiting part, which includes a first installation limiting part and a second installation limiting part. The first installation limiting part is disposed on the vehicle body, and the second installation limiting part is disposed on the warning flag mounting part. When the warning flag mounting part is in a first position, the first installation limiting part and the second installation limiting part contact each other to limit the warning flag mounting part.

[0007] In one embodiment, the first mounting limiting part includes a magnetic suction member fixed to the vehicle body, and the second mounting limiting part includes a portion of the outer surface of the warning flag mounting part. When the warning flag mounting part is in the first position, the magnetic suction member attracts a portion of the outer surface of the warning flag mounting part to limit the warning flag mounting part.

[0008] In one embodiment, the warning flag mounting part includes a front warning flag mounting member and a rear warning flag mounting member, the front warning flag mounting member being rotatably disposed at one end in the vehicle body extension direction, and the rear warning flag mounting member being rotatably disposed at the other end in the vehicle body extension direction;

[0009] The warning flag mounting part also includes a front-rear linkage assembly for connecting the front warning flag mounting component and the rear warning flag mounting component. When one of the front warning flag mounting component and the rear warning flag mounting component rotates, the other one is driven to rotate through the front-rear linkage assembly.

[0010] In one embodiment, the front-rear linkage assembly includes a linkage drive wheel, a linkage driven wheel, and a linkage conveyor belt. The linkage drive wheel is fixedly connected to one of the front warning flag mount and the rear warning flag mount, and the linkage driven wheel is fixedly connected to the other of the front and rear warning flag mounts. The linkage conveyor belt is sleeved on the linkage drive wheel and the linkage driven wheel. When the linkage drive wheel is driven to rotate by one of the front and rear warning flag mounts, the linkage drive wheel drives the linkage driven wheel to rotate via the linkage conveyor belt, and the linkage driven wheel drives the other of the front and rear warning flag mounts to rotate.

[0011] In one embodiment, the front and rear linkage components adopt a cross-drive structure.

[0012] In one embodiment, the auxiliary work vehicle further includes a traction unit rotatably disposed on the vehicle body.

[0013] In one embodiment, the traction unit and the warning flag mounting unit are connected, and when the traction unit rotates from the third position to the fourth position, it drives the warning flag mounting unit to rotate from the first position to the second position.

[0014] In one embodiment, in the first state, the traction part is located in the third position and extends out of the receiving cavity; in the second state, the traction part is located in the fourth position and is received into the receiving cavity.

[0015] In one embodiment, the auxiliary work vehicle includes a linkage unit, which includes a first linkage unit disposed on the traction unit and a second linkage unit disposed on the warning flag mounting unit, wherein the second linkage unit is movably connected to the first linkage unit.

[0016] In one embodiment, the first linkage part includes a guide wall that surrounds to form a guide groove, the second linkage part includes a guide shaft that connects one end to the warning flag mounting part, and the second linkage part further includes a guide bearing disposed at the other end of the guide shaft that is slidably disposed within the guide groove.

[0017] In one embodiment, the guide wall has an opening, and when the traction part rotates forward to a set angle, the guide bearing disengages from the guide groove through the opening; when the traction part rotates backward to a set angle, the guide bearing enters the guide groove through the opening.

[0018] In one embodiment, the traction unit includes a handle, a first rotating part, and a second rotating part. The handle is connected to one end of the first rotating part, and the other end of the first rotating part is rotatably connected to one end of the second rotating part. The other end of the second rotating part is rotatably connected to the vehicle body. When the first rotating part rotates by a first angle, the second rotating part rotates by a corresponding second angle.

[0019] In one embodiment, the traction unit further includes a traction transmission assembly, which includes a traction drive wheel, a traction driven wheel, a traction transmission belt, a sun gear, and planetary gears. The traction drive wheel is located at one end of the first rotating part near the second rotating part, and the traction driven wheel is located at one end of the second rotating part near the vehicle body. The traction transmission belt is sleeved on the traction drive wheel and the traction driven wheel. When the first rotating part rotates around the connection between the first rotating part and the second rotating part, it drives the traction drive wheel to rotate, and the traction drive wheel drives the traction driven wheel to rotate via the traction transmission belt.

[0020] The second rotating part is rotatably coaxially connected to the sun gear at one end near the vehicle body. The sun gear is fixedly connected to the vehicle body. The planet gear is rotatably disposed on the second rotating part and meshes with the sun gear. The planet gear is coaxially fixedly connected to the traction driven wheel. When the traction driven wheel rotates, it drives the planet gear to rotate. The planet gear rotates on its own axis and revolves around the sun gear. The revolution of the planet gear drives the second rotating part to rotate around the connecting axis between the second rotating part and the sun gear.

[0021] In one embodiment, the traction drive assembly adopts a cross-drive structure.

[0022] In one embodiment, the first rotating part is provided with a connecting shaft at one end near the second rotating part, and the second rotating part is provided with a connecting sleeve at one end near the first rotating part. The connecting shaft is rotatably fitted inside the connecting sleeve, and the traction drive wheel is connected to one end of the connecting shaft that extends out of the connecting sleeve.

[0023] In one embodiment, the traction part further includes a traction limiting part, which includes a first traction limiting part disposed on the first rotating part and a second traction limiting part disposed on the second rotating part. The first traction limiting part and the second traction limiting part are connected in a cooperative manner so that the first rotating part and the second rotating part remain relatively fixed.

[0024] In one embodiment, the first traction limiting part includes a spring plunger, the first rotating part is provided with a first limiting hole, the second traction limiting part includes a limiting plate fixed to the second rotating part, the limiting plate is provided with a second limiting hole, and the spring plunger passes through the first limiting hole and the second limiting hole.

[0025] In one embodiment, the limiting plate is provided with a plurality of second limiting holes arranged in a circumferential array, and the spring plunger passes through the first limiting hole and the second limiting holes at different positions, so as to keep the first rotating part and the second rotating part relatively fixed at different positions.

[0026] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0027] Thus, in the first state, the warning flag mounting section is exposed within the receiving cavity, allowing it to unfold. Workers can then install the warning flags within the mounting section and move the auxiliary work vehicle to a suitable position to provide warnings for the area. In the second state, the warning flag mounting section retracts into the receiving cavity, reducing protrusions on the auxiliary work vehicle's outer surface and making it smoother. This facilitates the attachment of the auxiliary work vehicle to the bottom of the fuel truck for transport.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0029] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0030] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 The diagram shown is a structural schematic of an auxiliary work vehicle in one embodiment.

[0032] Figure 2 for Figure 1 The diagram shows the structure of the auxiliary work vehicle after the upper body has been removed.

[0033] Figure 3 for Figure 1 A partial schematic diagram of the auxiliary work vehicle shown.

[0034] Figure 4 for Figure 1 The diagram shows the structure of the traction unit of the auxiliary work vehicle.

[0035] Wherein: 1-Auxiliary work vehicle; 10-Main vehicle; 20-Warning flag mounting part; 11-Vehicle body; 12-Wheel; 111-Receiving cavity; 112-Upper vehicle body; 113-Lower vehicle body; 114-First opening; 13-Wheel axle part; 131-First wheel axle; 132-Second wheel axle; 21-Bracket part; 22-Rotating shaft; 23-Front warning flag mounting component; 24-Rear warning flag mounting component; 25-Front and rear linkage assembly; 251-Linkage drive wheel; 252-Linkage driven wheel; 253-Linkage conveyor belt; 30-Installation limiting part; 31-First installation limiting part; 32-Second installation limiting part; 211-First flat plate; 212-Second flat plate; 40-Traction part; 115-Second opening; 41-First rotating part; 42-Second rotating part 43-Handle; 44-Traction transmission assembly; 441-Traction drive wheel; 442-Traction driven wheel; 443-Traction transmission belt; 444-Sun gear; 445-Planet gear; 446-Fixed shaft; 447-First bracket; 411-Connecting shaft; 421-Connecting sleeve; 422-Rotating rod; 45-Traction limiting part; 451-First traction limiting part; 452-Second traction limiting part; 4511-Spring plunger; 412-First limiting hole; 4521-Limiting plate; 4522-Second limiting hole; 50-Linkage part; 51-First linkage part; 52-Second linkage part; 511-Guide wall; 512-Guide groove; 521-Guide shaft; 522-Guide bearing; 26-Second bracket; 5111-Opening. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and do not limit the scope of protection of this disclosure.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0038] The auxiliary work vehicle of this disclosure will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0039] In one embodiment of this disclosure, reference is made to Figure 1 and Figure 2 As shown, an auxiliary work vehicle 1 is provided, including a main body 10 and a warning flag mounting part 20. The main body 10 includes a vehicle body 11 and wheels 12. The vehicle body 11 has a receiving cavity 111, and the wheels 12 are rotatably connected to the vehicle body 11. The warning flag mounting part 20 is disposed on the vehicle body 11 and rotatably connected to the vehicle body 11. The auxiliary work vehicle 1 includes a first state and a second state. In the first state, the auxiliary work vehicle 1 performs work, and the warning flag mounting part 20 is located in a first position, extending out of the receiving cavity 111; in the second state, the auxiliary work vehicle 1 stops working, and the warning flag mounting part 20 is located in a second position, retracted into the receiving cavity 111.

[0040] Thus, in the first state, the warning flag mounting part 20 is exposed in the receiving cavity 111, achieving deployment. Workers can install warning flags in the warning flag mounting part 20 and move the auxiliary work vehicle 1 to a suitable position to provide operational warnings for the area. In the second state, the warning flag mounting part 20 retracts into the receiving cavity 111, achieving folding, thereby reducing protrusions on the outer surface of the auxiliary work vehicle 1, making its outer surface flatter, and facilitating its attachment to the bottom of the aviation fuel truck for transport.

[0041] Preferably, continue to refer to Figure 1 and Figure 2 As shown, in some embodiments, the vehicle body 11 is a split structure, including an upper vehicle body 112 and a lower vehicle body 113. In the first direction z, the upper vehicle body 112 covers the lower vehicle body 113, forming a receiving cavity 111. In this embodiment, the first direction z is the vertical direction.

[0042] The top of the upper body 112 is provided with a first opening 114, through which the warning flag mounting part 20 extends or retracts into the receiving cavity 111. In this embodiment, the body 11 is configured as a cuboid structure extending along the second direction x and symmetrical along the axial direction. The first opening 114 is square. The shapes of the body 11 and the first opening 114 are relatively regular, making them easy to manufacture. In this embodiment, the second direction x is parallel to the axial direction of the body and perpendicular to the first direction z.

[0043] In some embodiments, the main vehicle 10 includes four wheels 12, wherein two wheels 12 are symmetrically arranged at one end of the vehicle body 11 with respect to the axial direction of the vehicle body 11, and the other two wheels 12 are symmetrically arranged at the other end of the vehicle body 11 with respect to the axial direction of the vehicle body 11. In this embodiment, the main vehicle 10 also includes an axle portion 13. The axle portion 13 includes a first axle 131 and a second axle 132. One end of the first axle 131 is connected to the side of the lower vehicle body 113 in the third direction y, and the other end of the first axle 131 is sleeved on the second axle 132. A first axle 131 is sleeved on the second axle 132 near both ends. The two wheels 12 are rotatably connected to the two ends of the second axle 132. In this embodiment, the third direction y is perpendicular to the second direction x and the first direction z. The plane xoy is a horizontal plane.

[0044] Optionally, in some embodiments, the warning flag mounting part 20 is configured as a bracket structure, allowing workers to mount the warning flag to the mounting part 20 when conducting warning operations. In other embodiments, the warning flag and the warning flag mounting part 20 are integrated into one structure.

[0045] Furthermore, in some embodiments, reference is made to Figure 2 As shown, the warning flag mounting part 20 includes a bracket part 21 and a rotating shaft 22. The rotating shaft 22 extends along a second direction x or a third direction y, and the rotating shaft 22 is rotatably connected to the vehicle body 11, for example, by providing a bearing for connection. The bracket part 21 and the rotating shaft 22 are fixedly connected.

[0046] In some embodiments, when the warning flag mounting portion 20 is in the first position, the support portion 21 is parallel to the first direction z, that is, the support portion 21 is vertically upward and extends out of the first opening 114. The support portion 21 and the rotating shaft 22 rotate 90° about the axis of the rotating shaft 22, so that the warning flag mounting portion 20 moves from the first position to the second position. When the warning flag mounting portion 20 is in the second position, the support portion 21 is parallel to the second direction x or the third direction y, that is, the support portion 21 extends horizontally and retracts into the receiving cavity 111, or is flush with the first opening 114. In this embodiment, the rotating shaft 22 extends along the third direction y, and when the warning flag mounting portion 20 is in the second position, the support portion 21 is parallel to the second direction x. This disclosure does not limit the specific orientation angle of the first position and the second position.

[0047] Optionally, in some embodiments, reference is made to Figure 2As shown, the warning flag mounting section 20 includes a front warning flag mount 23 and a rear warning flag mount 24. The front warning flag mount 23 is rotatably mounted at one end of the vehicle body 11 in the extending direction (second direction x), and the rear warning flag mount 24 is rotatably mounted at the other end of the vehicle body 11 in the extending direction (second direction x). The warning flag mounting section 20 also includes a front-rear linkage assembly 25 for connecting the front warning flag mount 23 and the rear warning flag mount 24. When one of the front warning flag mount 23 and the rear warning flag mount 24 rotates, the other is driven to rotate via the front-rear linkage assembly 25.

[0048] The front warning flag mount 23 and the rear warning flag mount 24 are respectively located at both ends of the vehicle body 11 in the first direction, increasing the distance between them and preventing the flags from getting tangled. Both the front warning flag mount 23 and the rear warning flag mount 24 include the aforementioned bracket portion 21 and rotating shaft 22. By setting up the front-rear linkage assembly 25, when using the auxiliary work vehicle 1, the operator only needs to rotate one of the front warning flag mount 23 or the rear warning flag mount 24, and the other will rotate accordingly. For example, rotating the front warning flag mount 23 from the second position to the first position, causing the bracket portion 21 of the warning flag mount 23 to extend out of the first opening 114, will also cause the bracket portion 21 of the rear warning flag mount 24 to rotate and extend out of the first opening 114. This improves the working efficiency of the auxiliary work vehicle 1.

[0049] Optionally, continue to refer to Figure 2 As shown, the front-rear linkage assembly 25 includes a linkage drive wheel 251, a linkage driven wheel 252, and a linkage conveyor belt 253. The linkage drive wheel 251 is fixedly connected to one of the front warning flag mount 23 and the rear warning flag mount 24, and the linkage driven wheel 252 is fixedly connected to the other of the front warning flag mount 23 and the rear warning flag mount 24. The linkage conveyor belt 253 is sleeved on the linkage drive wheel 251 and the linkage driven wheel 252. When the linkage drive wheel 251 is driven to rotate by one of the front warning flag mount 23 and the rear warning flag mount 24, the linkage drive wheel 251 drives the linkage driven wheel 252 to rotate via the linkage conveyor belt 253, and the linkage driven wheel 252 drives the other of the front warning flag mount 23 and the rear warning flag mount 24 to rotate.

[0050] Specifically, the drive wheel 251 and the rotating shaft 22 are coaxially fixed. When the drive wheel 251 rotates, it causes the rotating shaft 22 and the support part 21 to rotate by the same angle. Similarly, the driven wheel 252 is also coaxially fixed to the rotating shaft 22.

[0051] Furthermore, the front and rear linkage assembly 25 adopts a cross-drive structure. In this embodiment, the linkage conveyor belt 253 is twisted and folded in a figure-eight shape, causing the linkage driving wheel 251 and the linkage driven wheel 252 to rotate in opposite directions. For example, if the linkage driving wheel 251 rotates 90° clockwise, the linkage conveyor belt 253 drives the linkage driven wheel 252 to rotate 90° counterclockwise. This causes the front warning flag mount 23 and the rear warning flag mount 24 to rotate in opposite directions. Thus, the pivot 22 of the front warning flag mount 23 and the pivot 22 of the rear warning flag mount 24 can be positioned closer to the end of the vehicle body 11 in the second direction x. The bracket portion 21 of the front warning flag mount 23 and the bracket portion 21 of the rear warning flag mount 24 are positioned opposite each other in the second direction x. When both the front warning flag mount 23 and the rear warning flag mount 24 are in the first position, the distance between the bracket portion 21 of the front warning flag mount 23 and the bracket portion 21 of the rear warning flag mount 24 in the second direction x is close to the axial length of the vehicle body 11, which can ensure sufficient spacing space.

[0052] In this embodiment, the auxiliary work vehicle 1 is equipped with two sets of front warning flag mounting components 23 and rear warning flag mounting components 24. Correspondingly, each set of front and rear warning flag mounting components is equipped with a front and rear linkage assembly 25. The two sets of front and rear warning flag mounting components are respectively arranged near both ends of the vehicle body 11 in the third direction y.

[0053] In some embodiments, refer to Figure 3 As shown, the auxiliary work vehicle 1 includes a mounting limiting part 30, which includes a first mounting limiting part 31 and a second mounting limiting part 32. The first mounting limiting part 31 is located on the vehicle body 11, and the second mounting limiting part 32 is located on the warning flag mounting part 20. When the warning flag mounting part 20 is in the first position, the first mounting limiting part 31 and the second mounting limiting part 32 contact each other, limiting the warning flag mounting part 20. Thus, when the auxiliary work vehicle 1 is working, the warning flag mounting part 20 is limited and fixed by the mounting limiting part 30, ensuring that the warning flag can remain upright.

[0054] Specifically, the first mounting limiting part 31 includes a magnetic suction member fixed to the vehicle body 11, and the second mounting limiting part 32 includes a portion of the outer surface of the warning flag mounting part 20. When the warning flag mounting part 20 is in the first position, the magnetic suction member attracts the outer surface of the portion of the warning flag mounting part to limit its movement. Thus, when the warning flag mounting part 20 moves close to the first position, that is, close to the first mounting limiting part 31, it will be attracted and fixed by the magnetic suction member, allowing staff to better perceive whether the warning flag mounting part 20 has been rotated to the appropriate position.

[0055] Furthermore, in this embodiment, referring to Figure 2 and Figure 3As shown, the support portion 21 includes a first plate 211 and a second plate 212. One end of the first plate 211 is fixedly connected to the rotating shaft 22, and the other end is connected to the second plate 212. A warning flag is mounted on the second plate 212. The included angle between the first plate 211 and the second plate 212 is an obtuse angle, which can be set to, for example, 110°, 130°, or 150°, and this disclosure does not limit this. The second mounting limiting portion 32 is part of the outer surface of the support portion 21, and further, it is the side of the second plate 212 and the first mounting limiting portion 31 facing each other. The first mounting limiting portion 31 is configured with a right trapezoidal structure in longitudinal section. When the warning flag mounting portion 20 moves to near the first position, the first plate 211 extends along the first direction z. One side of the second plate 212 is adsorbed and fixed to the inclined surface of the first mounting limiting portion 31.

[0056] Optionally, in some embodiments, reference is made to Figure 1 and Figure 2 As shown, the auxiliary work vehicle 1 also includes a traction unit 40, which is rotatably mounted on the vehicle body 11. When using the auxiliary work vehicle 1, the operator pulls the traction unit 40 to move the auxiliary work vehicle 1. Since the traction unit 40 can rotate relative to the vehicle body 11, the change in the angle between the traction unit 40 and the vehicle body 11 correspondingly changes the height of the free end of the traction unit 40, thereby adapting it to the height of the operator and improving the user experience.

[0057] In this embodiment, the traction unit 40 is disposed near one end of the vehicle body 11 in the second direction x. The traction unit 40 rotates about the third direction y.

[0058] In some embodiments, in a first state, the traction unit 40 is in a third position, extending out of the receiving cavity 111. In a second state, the traction unit 40 is in a fourth position, retracting into the receiving cavity 111. Thus, in the first state, the traction unit 40 extends out of the receiving cavity 111, unfolding, allowing workers to pull the auxiliary work vehicle 1 to a suitable position for operation. In the second state, the traction unit 40 retracts into the receiving cavity 111, achieving a retraction, which has the same function as the warning flag mounting part 20 retracting into the receiving cavity 111.

[0059] Specifically, refer to Figure 1 As shown, the top of the upper body 112 is provided with a second opening 115, and the traction part 40 extends out of the second opening 115 or retracts into the receiving cavity 111. The second opening 115 can communicate with the first opening 114 for easy processing.

[0060] Furthermore, in some embodiments, reference is made to Figure 1 and Figure 4As shown, the traction unit 40 includes a first rotating part 41, a second rotating part 42, and a handle 43. The handle 43 is connected to one end of the first rotating part 41, and the other end of the first rotating part 41 is rotatably connected to one end of the second rotating part 42. The other end of the second rotating part 42 is rotatably connected to the vehicle body 11. When the first rotating part 41 rotates by a first angle, the second rotating part 42 rotates by a corresponding second angle. Thus, the rotation angles of the first rotating part 41 and the second rotating part 42 are correlated, allowing the handle 43 to move along a specific trajectory. When the first rotating part 41 rotates by the first angle, the second rotating part 42 rotates by a corresponding second angle, and the handle 43 located at one end of the first rotating part 41 has a corresponding height.

[0061] Optionally, in some embodiments, in the first state, the traction unit 40 is located in the third position, the first rotating part 41 rotates to extend along the second direction x, and the second rotating part 42 also rotates to extend along the second direction x. The second rotating part 42 is completely received into the receiving cavity 111, or flush with the second opening 115. The first rotating part 41 is completely received into the receiving cavity 111, or flush with the second opening 115, or partially received into the receiving cavity 111 and partially extended out of the vehicle body 11 along the second direction x. The first rotating part 41 and the second rotating part 42 create a folding effect within the horizontal plane xoy.

[0062] Preferably, in some embodiments, reference is made to Figure 4 As shown, the traction unit 40 also includes a traction transmission assembly 44, which includes a traction drive wheel 441, a traction driven wheel 442, a traction transmission belt 443, a sun gear 444, and planetary gears 445. The traction drive wheel 441 is located at one end of the first rotating part 41 near the second rotating part 42, and the traction driven wheel 442 is located at one end of the second rotating part 42 near the vehicle body 11. The traction transmission belt 443 is sleeved on the traction drive wheel 441 and the traction driven wheel 442. When the first rotating part 41 rotates around the connection between the first rotating part 41 and the second rotating part 42, it drives the traction drive wheel 441 to rotate, and the traction drive wheel 441 drives the traction driven wheel 442 to rotate through the traction transmission belt 443. The second rotating part 42 is rotatably coaxially connected to the sun gear 444 at one end near the vehicle body 11. The sun gear 444 is fixedly connected to the vehicle body 11. The planet gear 445 is rotatably disposed on the second rotating part 42 and meshes with the sun gear 444. The planet gear 445 is coaxially fixedly connected to the traction driven wheel 442. When the traction driven wheel 442 rotates, it drives the planet gear 445 to rotate. The planet gear 445 rotates on its own axis and revolves around the sun gear 444. The revolution of the planet gear 445 drives the second rotating part 42 to rotate around the fixed axis 446 between the second rotating part 42 and the sun gear 444.

[0063] The fixed shaft 446 is fixedly connected to the vehicle body 11 via the first bracket 447, and the planetary gear 445 is rotatably connected to the fixed shaft 446.

[0064] Specifically, the transmission ratio between the driving traction wheel 441 and the driven traction wheel 442, and the transmission ratio between the sun gear 444 and the planet gears 445, are designed according to the actual required movement trajectory of the handle 43.

[0065] Furthermore, the traction transmission assembly 44 adopts a cross-drive structure. In this embodiment, the traction transmission belt 443 is twisted and folded into a figure-eight shape, causing the traction drive wheel 441 and the traction driven wheel 442 to rotate in opposite directions. For example, if the traction drive wheel 441 rotates 90° clockwise, the traction transmission belt 443 will drive the traction driven wheel 442 to rotate 90° counterclockwise. This results in the first rotating part 41 and the second rotating part 42 rotating in opposite directions.

[0066] In actual use, the operator pulls handle 43 upwards, causing the first rotating part 41 to rotate counterclockwise. The first rotating part 41 drives the traction drive wheel 441 to rotate counterclockwise, and the traction drive wheel 441 drives the traction driven wheel 442 to rotate clockwise via the traction transmission belt 443. The planetary gear 445, coaxially connected to the traction driven wheel 442, also rotates clockwise. While rotating clockwise on its own axis, the planetary gear 445 revolves clockwise around the sun gear 444. The clockwise revolution of the planetary gear 445 drives the second rotating part 42 to rotate clockwise around the fixed axis 446. In this way, the entire traction part 40 is pulled out of the receiving cavity 111, thus unfolding.

[0067] Understandably, when the staff pushes the handle 43 downwards, the aforementioned components will move in the opposite direction, causing the entire traction part 40 to retract into the receiving cavity 111, thus achieving folding.

[0068] In some embodiments, continue to refer to Figure 4 As shown, the first rotating part 41 has a connecting shaft 411 at one end near the second rotating part 42, and the second rotating part 42 has a connecting sleeve 421 at one end near the first rotating part 41. The connecting shaft 411 is rotatably fitted inside the connecting sleeve 421, and the traction drive wheel 441 and the connecting shaft 411 are connected at one end extending out of the connecting sleeve 421. When the first rotating part 41 rotates around the connection point of the first rotating part 41 and the second rotating part 42, the connecting shaft 411 rotates relative to the connecting sleeve 421.

[0069] Specifically, in this embodiment, the second rotating part 42 includes two rotating rods 422, which are symmetrically sleeved at both ends of the connecting shaft 411. The rotating rods 422 are hollow. The traction part 40 includes two sets of traction transmission assemblies 44, which are respectively arranged corresponding to the two sets of rotating rods 422. The traction transmission belt 443 passes through the rotating rods 422.

[0070] Optionally, in some embodiments, reference is made to Figure 1As shown, the traction unit 40 also includes a traction limiting unit 45, which includes a first traction limiting part 451 disposed on the first rotating part 41 and a second traction limiting part 452 disposed on the second rotating part 42. The first traction limiting part 451 and the second traction limiting part 452 are connected to each other, so that the first rotating part 41 and the second rotating part 42 remain relatively fixed. Thus, when the first rotating part 41 and the second rotating part 42 rotate to a suitable position, so that the height of the handle 43 meets the user's needs, the connection between the first traction limiting part 451 and the second traction limiting part 452 keeps the first rotating part 41 fixed relative to the second rotating part 42, allowing the user to continuously use the handle 43 at a suitable height.

[0071] Understandably, when the first rotating part 41 remains fixed relative to the second rotating part 42, the traction drive wheel 441 cannot rotate. Correspondingly, the traction driven wheel 442, traction drive belt 443, sun gear 444, and planetary gears 445 all remain fixed, thereby keeping the second rotating part 42 fixed relative to the vehicle body 11. The included angle α between the first rotating part 41 and the second rotating part 42 remains constant. That is, the entire traction part 40 remains fixed relative to the vehicle body 11. This ensures that the height of the handle 43 relative to the ground remains constant.

[0072] Specifically, refer to Figure 1 and Figure 4 As shown, the first traction limiting part 451 includes a spring plunger 4511, the first rotating part 41 is provided with a first limiting hole 412, and the second traction limiting part 452 includes a limiting plate 4521 fixed to the second rotating part 42, the limiting plate 4521 is provided with a second limiting hole 4522, and the spring plunger 4511 passes through the first limiting hole 412 and the second limiting hole 4522. Thus, when the operator pulls the handle 43 upwards, causing the first rotating part 41 and the second rotating part 42 to rotate until the positions of the first limiting hole 412 and the second limiting hole 4522 correspond, the operator inserts the spring plunger 4511 into the two holes to fix the first rotating part 41 and the second rotating part 42, making operation convenient. When the operator needs to push the handle 43 downwards to retract the traction part 40, the spring plunger 4511 is first pulled out of the first limiting hole 412 and the second limiting hole 4522, and then the first rotating part 41 and the second rotating part 42 are rotated.

[0073] In this embodiment, the limiting plate 4521 is an annular plate and is disposed at one end of the connecting sleeve 421 of the second rotating part 42. Further, the limiting plate 4521 is fixed to the end of the connecting sleeve 421 away from the traction drive wheel 441, and the first rotating part 41 has a rotating groove corresponding to the limiting plate 4521, with a portion of the limiting plate 4521 located within the rotating groove. The first limiting hole 412 communicates with the rotating groove. When the second limiting hole 4522 rotates into the rotating groove, it corresponds to the position of the first limiting hole 412.

[0074] Preferably, the limiting plate 4521 is provided with a plurality of second limiting holes 4522 arranged in a circumferential array. A spring plunger 4511 passes through the first limiting hole 412 and the second limiting holes 4522 at different positions, thereby keeping the first rotating part 41 and the second rotating part 42 relatively fixed at different positions. In this way, the spring plunger 4511 engages the first limiting hole 412 and the second limiting holes 4522 at different positions, allowing the included angle α between the first rotating part 41 and the second rotating part 42 to maintain different numerical values. Correspondingly, the handle 43 can be fixed at different heights to meet the usage needs of workers of different heights and improve the user experience.

[0075] In some embodiments, the traction unit 40 and the warning flag mounting unit 20 are connected. When the traction unit 40 rotates from the third position to the fourth position, it drives the warning flag mounting unit 20 to rotate from the first position to the second position. By configuring the traction unit 40 and the warning flag mounting unit 20 as a linked structure, workers can simultaneously unfold and retract both the traction unit 40 and the warning flag mounting unit 20 by lifting and pushing the traction unit 40, making operation very convenient.

[0076] Specifically, refer to Figure 1 As shown, the auxiliary work vehicle 1 includes a linkage unit 50, which includes a first linkage unit 51 located on the traction unit 40 and a second linkage unit 52 located on the warning flag mounting unit 20. The second linkage unit 52 is movably connected to the first linkage unit 51. Thus, when the traction unit 40 rotates, it drives the first linkage unit 51 to move, the first linkage unit 51 drives the second linkage unit 52 to move, and the second linkage unit 52 drives the warning flag mounting unit 20 to rotate, thereby realizing the linkage between the traction unit 40 and the warning flag mounting unit 20.

[0077] In some embodiments, refer to Figure 1 and Figure 3 As shown, the first linkage part 51 includes a guide wall 511, which encloses to form a guide groove 512. The second linkage part 52 includes a guide shaft 521, one end of which is connected to the warning flag mounting part 20. The second linkage part 52 also includes a guide bearing 522, located at the other end of the guide shaft 521, which is slidably disposed within the guide groove 512. When the traction part 40 rotates, it drives the guide wall 511 to rotate. The rotation of the guide wall 511 drives the guide bearing 522 to rotate, causing the guide bearing 522 to move within the guide groove 512 along its extension direction. The movement of the guide bearing 522 drives the warning flag mounting part 20 to rotate.

[0078] When the guide bearing 522 moves within the guide groove 512 along the extension direction of the guide groove 512, friction is generated between the guide bearing 522 and the guide wall 511. The guide bearing 522 rotates to reduce this friction.

[0079] In this embodiment, the two front warning flag mounts 23 are arranged adjacent to the two rotating rods 422 of the second rotating part 42 in the third direction y. The guide wall 511 is fixed to the side opposite to the rotating rod 422 and the front warning flag mount 23, and is located near the planetary gear 445. The angle between the extension direction of the guide groove 512 and the extension direction of the rotating rod 422 is set according to the actual required linkage effect. The connection end of the guide shaft 521 and the warning flag mount 20 is set to be fixed to the rotating shaft 22. The rotating shaft 22 is connected to multiple components such as the guide shaft 521, the bracket part 21, and the linkage drive wheel 251, and its axial length needs to be set to be relatively long. Therefore, the rotating shaft 22 is provided with two second brackets 26 for support.

[0080] Furthermore, in some embodiments, reference is made to Figure 1 and Figure 4 As shown, the guide wall 511 has an opening 5111. When the traction unit 40 rotates forward to a set angle, the guide bearing 522 disengages from the guide groove 512 through the opening 5111; when the traction unit 40 rotates in the reverse direction to a set angle, the guide bearing 522 enters the guide groove 512 through the opening 5111. The maximum rotation angle of the traction unit 40 and the maximum rotation angle of the warning flag mounting part 20 may have inconsistent requirements. For example, the warning flag mounting part 20 only needs to rotate 90° to achieve full deployment, while the second rotating part 42 of the traction unit 40 needs to rotate 100° to achieve full deployment. Therefore, by providing the opening 5111 on the guide wall 511, the separation and connection of the first linkage part 51 and the second linkage part 52 can be achieved, realizing the release and establishment of the linkage between the traction unit 40 and the warning flag mounting part 20, thus solving the aforementioned problem.

[0081] When the traction unit 40 rotates forward to the set angle, that is, when the traction unit 40 is pulled in the unfolding direction, the traction unit 40 drives the warning flag mounting part 20 to rotate through the linkage unit 50 until the warning flag mounting part 20 is fully unfolded. At this point, the guide bearing 522 disengages from the guide groove 512 through the opening 5111, the first linkage unit 51 and the second linkage unit 52 separate, the warning flag mounting part 20 stops rotating, and the traction unit 40 can continue to rotate until it is fully unfolded. Similarly, when the traction unit 40 rotates in the reverse direction to the set angle, that is, when the traction unit 40 is pushed in the retracting direction, the guide bearing 522 enters the guide groove 512 through the opening 5111, and the first linkage unit 51 and the second linkage unit 52 connect. The traction unit 40 continues to rotate and drives the warning flag mounting part 20 to rotate through the linkage unit 50 until the traction unit 40 and the warning flag mounting part 20 are fully retracted.

[0082] In actual use, the operator pulls the handle 43 upwards, causing the first rotating part 41 to rotate counterclockwise and the second rotating part 42 to rotate clockwise. The clockwise rotation of the second rotating part 42 drives the guide wall 511 to rotate clockwise. The guide bearing 522 follows the clockwise rotation of the guide wall 511 and moves towards the planetary gear 445 within the guide groove 512. The clockwise rotation of the guide bearing 522 drives the guide shaft 521 to rotate clockwise. The clockwise rotation of the guide shaft 521 drives the rotating shaft 22 and the front warning flag mount 23 to rotate clockwise. The front warning flag mount 23 drives the rear warning flag mount 24 to rotate counterclockwise via the front and rear linkage assembly 25. When the first rotating part 41 and the second rotating part 42 rotate to a set angle, the first linkage part 51 and the second linkage part 52 separate, and the front warning flag mount 23 and the rear warning flag mount 24 are fully extended. The first rotating part 41 and the second rotating part 42 continue to rotate until they are fully extended.

[0083] The operator pushes the handle 43 downwards, causing the first rotating part 41 to rotate clockwise and the second rotating part 42 to rotate counterclockwise. When the first rotating part 41 and the second rotating part 42 rotate to a set angle, the first linkage part 51 and the second linkage part 52 connect. The second rotating part 42 and the guide wall 511 then rotate counterclockwise, causing the guide bearing 522 to rotate counterclockwise along with the guide wall 511, and the guide bearing 522 moves away from the planetary gear 445 within the guide groove 512. The counterclockwise rotation of the guide bearing 522 drives the guide shaft 521 to rotate counterclockwise. The counterclockwise rotation of the guide shaft 521 drives the rotating shaft 22 and the front warning flag mount 23 to rotate counterclockwise. The front warning flag mount 23 drives the rear warning flag mount 24 to rotate clockwise via the front and rear linkage assembly 25. Finally, the first rotating part 41 and the second rotating part 42, as well as the front warning flag mount 23 and the rear warning flag mount 24, are completely retracted.

[0084] In practical applications, initially, the towing unit 40 is in the fourth position, and the warning flag mounting unit 20 is in the second position, meaning both the towing unit 40 and the warning flag mounting unit 20 are fully retracted, and the auxiliary work vehicle 1 is in the second position. Workers attach the auxiliary work vehicle 1 to the bottom of the fuel truck, transport it to the work site, and then unload the auxiliary work vehicle 1.

[0085] Next, the worker pulls the handle 43 upwards, causing the first rotating part 41 to rotate counterclockwise and the second rotating part 42 to rotate clockwise. The front warning flag mount 23 and the rear warning flag mount 24 rotate in tandem until they are fully extended. The front warning flag mount 23 and the rear warning flag mount 24 are limited and fixed by the installation limiting part 30, that is, the bracket part 21 is magnetically attached and fixed. The first rotating part 41 and the second rotating part 42 continue to rotate until the handle 43 reaches the height required by the worker, at which point it is limited and fixed by the spring plunger 4511. At this time, the auxiliary work vehicle 1 is in the first state. The worker pulls the handle 43 to move the auxiliary work vehicle 1 to the work site.

[0086] When auxiliary work vehicle 1 finishes its work, the worker moves it back to the fuel truck. The worker pulls out the spring plunger 4511 and then pushes down the handle 43, causing the first rotating part 41 to rotate clockwise and the second rotating part 42 to rotate counterclockwise. When the first rotating part 41 and the second rotating part 42 rotate to the set angle, the front warning flag mount 23 and the rear warning flag mount 24 rotate in tandem. Finally, the towing part 40 returns to the fourth position, the warning flag mount 20 returns to the second position, and both the towing part 40 and the warning flag mount 20 return to their retracted state, placing auxiliary work vehicle 1 in the second state. The worker then hooks auxiliary work vehicle 1 back onto the bottom of the fuel truck and leaves the work area.

[0087] In this embodiment, both the traction unit 40 and the warning flag mounting unit 20 are mechanical structures, and the linkage structure between them is also purely mechanical, reducing the need for a drive unit. This reduces the weight of the auxiliary work vehicle 1 and lowers the explosion-proof requirements. In other embodiments, a drive unit can be provided as needed to automate the deployment and retraction of the traction unit 40 and the warning flag mounting unit 20.

[0088] In the description of this disclosure, it should be understood that the terms "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0089] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0091] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0092] It should be noted that when a component is described as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. An auxiliary work vehicle, characterized in that, include: The main vehicle includes a vehicle body and wheels, the vehicle body is provided with a receiving cavity, and the wheels and the vehicle body are rotatably connected; and A warning flag mounting part is disposed on the vehicle body and rotatably connected to the vehicle body; the auxiliary work vehicle includes a first state and a second state. In the first state, the auxiliary work vehicle performs work, and the warning flag mounting part is located in the first position, extending out of the receiving cavity; in the second state, the auxiliary work vehicle stops working, and the warning flag mounting part is located in the second position, being received into the receiving cavity. The auxiliary work vehicle also includes a traction unit, which is rotatably mounted on the vehicle body; The traction unit and the warning flag mounting unit are connected. When the traction unit rotates from the third position to the fourth position, it drives the warning flag mounting unit to rotate from the first position to the second position. The auxiliary work vehicle includes a linkage unit, which includes a first linkage unit disposed on the traction unit and a second linkage unit disposed on the warning flag mounting unit. The second linkage unit is movably connected to the first linkage unit. The first linkage part includes a guide wall that surrounds and forms a guide groove. The second linkage part includes a guide shaft, one end of which is connected to the warning flag mounting part. The second linkage part also includes a guide bearing located at the other end of the guide shaft and slidably disposed within the guide groove.

2. The auxiliary work vehicle as described in claim 1, characterized in that, The auxiliary work vehicle includes an installation limiting part, which includes a first installation limiting part and a second installation limiting part. The first installation limiting part is disposed on the vehicle body, and the second installation limiting part is disposed on the warning flag installation part. When the warning flag installation part is in the first position, the first installation limiting part and the second installation limiting part contact each other to limit the warning flag installation part.

3. The auxiliary work vehicle as described in claim 2, characterized in that, The first mounting limiting part includes a magnetic suction member fixed to the vehicle body, and the second mounting limiting part includes a portion of the outer surface of the warning flag mounting part. When the warning flag mounting part is in the first position, the magnetic suction member attracts a portion of the outer surface of the warning flag mounting part to limit the warning flag mounting part.

4. The auxiliary work vehicle as described in claim 1, characterized in that, The warning flag mounting part includes a front warning flag mounting component and a rear warning flag mounting component. The front warning flag mounting component is rotatably disposed at one end of the vehicle body extending direction, and the rear warning flag mounting component is rotatably disposed at the other end of the vehicle body extending direction. The warning flag mounting part also includes a front-rear linkage assembly for connecting the front warning flag mounting component and the rear warning flag mounting component. When one of the front warning flag mounting component and the rear warning flag mounting component rotates, the other one is driven to rotate through the front-rear linkage assembly.

5. The auxiliary work vehicle as described in claim 4, characterized in that, The front and rear linkage assembly includes a linkage drive wheel, a linkage driven wheel, and a linkage conveyor belt. The linkage drive wheel is fixedly connected to one of the front warning flag mounting component and the rear warning flag mounting component, and the linkage driven wheel is fixedly connected to the other of the front and rear warning flag mounting components. The linkage conveyor belt is sleeved on the linkage drive wheel and the linkage driven wheel. When the linkage drive wheel is driven to rotate by one of the front and rear warning flag mounting components, the linkage drive wheel drives the linkage driven wheel to rotate through the linkage conveyor belt, and the linkage driven wheel drives the other of the front and rear warning flag mounting components to rotate.

6. The auxiliary work vehicle as described in claim 4, characterized in that, The front and rear linkage components adopt a cross-drive structure.

7. The auxiliary work vehicle as described in claim 1, characterized in that, In the first state, the traction part is located in the third position and extends out of the receiving cavity; in the second state, the traction part is located in the fourth position and is received into the receiving cavity.

8. The auxiliary work vehicle as described in claim 1, characterized in that, The guide wall has an opening. When the traction unit rotates forward to a set angle, the guide bearing disengages from the guide groove through the opening. When the traction unit rotates backward to a set angle, the guide bearing enters the guide groove through the opening.

9. The auxiliary work vehicle as described in claim 1, characterized in that, The traction unit includes a handle, a first rotating part, and a second rotating part. The handle is connected to one end of the first rotating part, and the other end of the first rotating part is rotatably connected to one end of the second rotating part. The other end of the second rotating part is rotatably connected to the vehicle body. When the first rotating part rotates at a first angle, the second rotating part rotates at a corresponding second angle.

10. The auxiliary work vehicle as described in claim 9, characterized in that, The traction unit further includes a traction transmission assembly, which includes a traction drive wheel, a traction driven wheel, a traction transmission belt, a sun gear, and planetary gears. The traction drive wheel is located at one end of the first rotating part near the second rotating part, and the traction driven wheel is located at one end of the second rotating part near the vehicle body. The traction transmission belt is sleeved on the traction drive wheel and the traction driven wheel. When the first rotating part rotates around the connection between the first rotating part and the second rotating part, it drives the traction drive wheel to rotate, and the traction drive wheel drives the traction driven wheel to rotate through the traction transmission belt. The second rotating part is rotatably coaxially connected to the sun gear at one end near the vehicle body. The sun gear is fixedly connected to the vehicle body. The planet gear is rotatably disposed on the second rotating part and meshes with the sun gear. The planet gear is coaxially fixedly connected to the traction driven wheel. When the traction driven wheel rotates, it drives the planet gear to rotate. The planet gear rotates on its own axis and revolves around the sun gear. The revolution of the planet gear drives the second rotating part to rotate around the connecting axis between the second rotating part and the sun gear.

11. The auxiliary work vehicle as described in claim 10, characterized in that, The traction drive assembly adopts a cross-drive structure.

12. The auxiliary work vehicle as described in claim 10, characterized in that, The first rotating part has a connecting shaft at one end near the second rotating part, and the second rotating part has a connecting sleeve at one end near the first rotating part. The connecting shaft is rotatably fitted inside the connecting sleeve, and the traction drive wheel is connected to one end of the connecting shaft that extends out of the connecting sleeve.

13. The auxiliary work vehicle as described in claim 9, characterized in that, The traction part further includes a traction limiting part, which includes a first traction limiting part disposed on the first rotating part and a second traction limiting part disposed on the second rotating part. The first traction limiting part and the second traction limiting part are connected in cooperation so that the first rotating part and the second rotating part remain relatively fixed.

14. The auxiliary work vehicle as described in claim 13, characterized in that, The first traction limiting part includes a spring plunger, the first rotating part is provided with a first limiting hole, the second traction limiting part includes a limiting plate fixed to the second rotating part, the limiting plate is provided with a second limiting hole, and the spring plunger passes through the first limiting hole and the second limiting hole.

15. The auxiliary work vehicle as described in claim 14, characterized in that, The limiting plate is provided with a plurality of second limiting holes arranged in a circumferential array. The spring plunger passes through the first limiting hole and the second limiting holes at different positions, so as to keep the first rotating part and the second rotating part relatively fixed at different positions.

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