Movement mechanism and engineering operation vehicle

By designing adjustable rotating components and auxiliary wheel components, the problem of poor stability of engineering vehicles in pipelines of different sizes was solved, achieving stable operation and efficient cleaning in different pipelines.

CN223867391UActive Publication Date: 2026-02-03JIANGSU CHENGAN PIPE NETWORK TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202520479677.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-18
Publication Date
2026-02-03
Estimated Expiration
2035-03-18

AI Technical Summary

Technical Problem

Existing engineering vehicles have poor stability when moving within pipelines of different sizes. The auxiliary wheel assembly cannot make contact with the side wall of the pipeline due to its fixed installation position, resulting in unstable movement.

Method used

A motion mechanism is designed, including a mounting component, a rotating component, and an auxiliary wheel assembly. The rotating component can swing relative to the mounting component, thereby driving the auxiliary wheel assembly to adjust the distance between itself and the side wall of the pipeline network. An automatic reset function is provided by a torsion spring to ensure that the auxiliary wheel assembly can abut against the side wall of the pipeline network of different sizes.

Benefits of technology

It improves the stability and versatility of engineering vehicles in pipelines of different sizes, enhances work efficiency and reliability, and ensures that the auxiliary wheel assembly can be flexibly adjusted to adapt to different pipeline environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of pipe network cleaning, in particular to a movement mechanism and an engineering operation vehicle, the movement mechanism comprises an installation part, a rotating assembly and an auxiliary wheel assembly, one end of the installation part is used for being connected with the engineering operation vehicle, and one end of the rotating assembly is movably installed at the other end of the installation part; the auxiliary wheel assembly is installed at the other end of the rotating assembly and used for abutting against the side wall of the external pipe network, it is guaranteed that the auxiliary wheel assembly can abut against the side wall of the pipe network all the time through the movement mechanism, and the movement stability of the engineering operation vehicle is improved.
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Description

Technical Field

[0001] This utility model relates to the field of pipeline cleaning technology, and in particular to a motion mechanism and engineering operation vehicle. Background Technology

[0002] Drainage pipe network cleaning is an important component of activated sludge systems in wastewater treatment. Its main function is to clarify and concentrate the mixed liquor in the biological reaction tank, complete the sludge-water separation process, and return the activated sludge. Its operational efficiency directly affects the effluent quality and the concentration of returned sludge from the activated sludge system. The growth of algae on the sewage pipe network and weirs directly impacts the operational efficiency of the wastewater treatment system, therefore, regular cleaning of the sewage pipe network is necessary.

[0003] Existing technology uses engineering vehicles to clean the inside of pipelines. In order to maintain the stability of the engineering vehicle's movement inside the pipeline, the engineering vehicle is usually equipped with auxiliary wheel assemblies to abut against the side wall of the pipeline. However, the existing auxiliary wheel assemblies are usually fixed to the chassis of the engineering vehicle and are not adjustable. When the engineering vehicle is applied to pipelines of different sizes, the auxiliary wheel assemblies are prone to failure to abut against the side wall of the pipeline due to the limitation of their own installation position, which leads to a decrease in the movement stability of the engineering vehicle. Utility Model Content

[0004] The main purpose of this invention is to propose a motion mechanism that aims to solve the problem of poor motion stability in existing engineering vehicles.

[0005] To solve the above problems, this utility model proposes a motion mechanism, comprising:

[0006] The mounting component, one end of which is used to connect to the engineering work vehicle;

[0007] A rotating assembly, one end of which is movably mounted to the other end of the mounting member; and

[0008] An auxiliary wheel assembly is mounted at the other end of the rotating assembly and is used to abut against the side wall of the external pipeline network;

[0009] The rotating component can swing relative to the mounting component to drive the auxiliary wheel assembly to adjust its distance from the side wall of the external pipeline network.

[0010] In one embodiment, the motion mechanism further includes a torsion spring, the other end of the mounting member is provided with a fixed shaft, one end of the rotating assembly is rotatably connected to the fixed shaft, one extension end of the torsion spring is connected to one end of the mounting member, and the other extension end is connected to the rotating assembly.

[0011] In one embodiment, the motion mechanism includes two torsion springs, which are respectively sleeved on both ends of the fixed shaft along the axial direction. One extension end of each torsion spring is connected to one end of the mounting member, and the other extension end is connected to the rotating assembly.

[0012] In one embodiment, the rotating assembly includes a connecting rod and two rotating arms, with one end of the two rotating arms on the same side respectively sleeved on both ends of the fixed shaft in the axial direction, and a torsion spring pressed onto the surface of one of the rotating arms.

[0013] The other ends of the two rotating arms on the same side are installed at intervals on one end of the connecting rod, the other extension ends of the two torsion springs are connected to the connecting rod, and the auxiliary wheel assembly is installed on the other end of the connecting rod.

[0014] In one embodiment, a first connecting hole is provided at one end of the mounting member, a second connecting hole is provided on the outer periphery of the connecting rod, an extension end of the torsion spring is inserted into the first connecting hole, and the other extension end of the torsion spring is inserted into the second connecting hole.

[0015] In one embodiment, the motion mechanism further includes a fastener threadedly connected to one end of the connecting rod away from the auxiliary wheel assembly to secure the connecting rod to the rotating arm away from the auxiliary wheel assembly.

[0016] In one embodiment, the auxiliary wheel assembly includes an auxiliary wheel and a mounting rod, with one end of the connecting rod detachably mounted to one end of the mounting rod, and the other end of the mounting rod inserted into the auxiliary wheel.

[0017] In one embodiment, the auxiliary wheel assembly further includes a fixing member, one end of the mounting rod is provided with a mounting groove, the groove wall of the mounting groove is provided with a through hole, and the fixing member is threaded to the through hole to fasten the connecting rod to the part of the mounting rod that is inserted into the groove wall of the mounting groove.

[0018] This utility model also proposes an engineering work vehicle, including a vehicle body and a motion mechanism. The motion mechanism is the motion mechanism described above. The motion mechanism is installed on the chassis of the vehicle body and is used to abut against the side wall of the external pipeline network.

[0019] In one embodiment, the engineering work vehicle includes a plurality of motion mechanisms, which are spaced apart on one side of the chassis of the vehicle body along the direction of movement of the engineering work vehicle.

[0020] This utility model proposes a motion mechanism, including a mounting component, a rotating component, and an auxiliary wheel assembly. One end of the mounting component is connected to an engineering work vehicle, and the rotating component is movably mounted on the other end of the mounting component. The rotating component can swing relative to the mounting component. When the rotating component swings outward relative to the mounting component, it drives the auxiliary wheel assembly to swing outward relative to the engineering work vehicle, thereby abutting against the sidewall of a larger pipe network. Conversely, when the rotating component swings inward relative to the mounting component, it drives the auxiliary wheel assembly to swing inward relative to the engineering work vehicle, thereby abutting against the sidewall of a smaller pipe network. This motion mechanism ensures that the auxiliary wheel assembly can always abut against the sidewall of pipe networks of different sizes, improving the motion stability of the engineering work vehicle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the motion mechanism of this utility model;

[0023] Figure 2 for Figure 1 Exploded view of part of the structure in the Chinese embodiment;

[0024] Figure 3 This is a structural schematic diagram of an embodiment of the engineering work vehicle of this utility model.

[0025] Explanation of icon numbers:

[0026] 10. Motion mechanism; 11. Mounting component; 12. Rotating assembly; 121. Connecting rod; 122. Rotating arm; 13. Auxiliary wheel assembly; 131. Auxiliary wheel; 132. Mounting rod; 1321. Mounting groove; 133. Fixing component; 14. Torsion spring; 15. Fixed shaft; 16. Fastener; 20. Vehicle body.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Existing technologies typically employ engineering work vehicles to clean the inside of pipelines. To maintain the stability of the engineering work vehicle's movement within the pipeline, it is usually equipped with auxiliary wheel assemblies to abut against the side walls of the pipeline. However, existing auxiliary wheel assemblies are usually fixed to the chassis of the engineering work vehicle and are not adjustable. When the engineering work vehicle is applied to pipelines of different sizes, the auxiliary wheel assemblies may fail to abut against the side walls of the pipeline due to the limitations of their installation position, thereby reducing the movement stability of the engineering work vehicle.

[0032] To address the aforementioned problems, this utility model proposes a motion mechanism designed to solve the issue of poor motion stability in existing engineering work vehicles.

[0033] like Figures 1 to 3 In one embodiment, the motion mechanism 10 includes a mounting member 11, a rotating component 12, and an auxiliary wheel assembly 13. One end of the mounting member 11 is used to connect to the engineering work vehicle, one end of the rotating component 12 is movably mounted on the other end of the mounting member 11, and the auxiliary wheel assembly 13 is mounted on the other end of the rotating component 12. The auxiliary wheel assembly 13 is used to abut against the side wall of the external pipeline network.

[0034] In this embodiment, the mounting component 11 is a metal connector to enable the motion mechanism 10 to be stably connected to the chassis of the engineering vehicle. The connection method can be a threaded connection or a snap-fit ​​connection. While ensuring a stable connection between the motion mechanism 10 and the chassis of the engineering vehicle, it is also easy to replace and disassemble, thus improving the practicality of the motion mechanism 10. One end of the rotating component 12 is rotatably connected to the other end of the mounting component 11, allowing it to swing vertically relative to the mounting component 11. The other end of the rotating component 12 is mounted on the auxiliary wheel assembly 13. The main function of the auxiliary wheel assembly 13 is to abut against the side wall of the external pipeline network, improving the movement stability of the engineering vehicle. When the rotating component 12 swings outward relative to the mounting component 11, the area of ​​the auxiliary wheel assembly 13 extending out of the chassis of the engineering vehicle gradually increases, thereby reducing the distance between the auxiliary wheel assembly 13 and the side wall of the pipeline network. This allows the engineering vehicle to move within a larger pipeline network. Conversely, when the rotating component 12 swings inward relative to the mounting component 11, the engineering vehicle can move within a smaller pipeline network. This ensures that the auxiliary wheel assembly 13 can always abut against the side wall of pipelines of different sizes, improving the versatility of the engineering vehicle.

[0035] This utility model proposes a motion mechanism 10, including a mounting component 11, a rotating component 12, and an auxiliary wheel assembly 13. One end of the mounting component 11 is connected to the chassis of an engineering work vehicle, and the rotating component 12 is movably mounted on the other end of the mounting component 11. The rotating component 12 can swing relative to the mounting component 11. When the rotating component 12 swings outward relative to the mounting component 11, it drives the auxiliary wheel assembly 13 to swing outward relative to the chassis of the engineering work vehicle, thereby abutting against the sidewall of a larger pipe network. Conversely, when the rotating component 12 swings inward relative to the mounting component 11, it drives the auxiliary wheel assembly 13 to swing inward relative to the chassis of the engineering work vehicle, thereby abutting against the sidewall of a smaller pipe network. This motion mechanism 10 ensures that the auxiliary wheel assembly 13 can always abut against the sidewall of pipe networks of different sizes, thereby improving the motion stability of the engineering work vehicle.

[0036] like Figures 1 to 3 In one embodiment, the motion mechanism 10 further includes a torsion spring 14, the other end of the mounting member 11 is provided with a fixed shaft 15, one end of the rotating component 12 is rotatably connected to the fixed shaft 15, one extension end of the torsion spring 14 is connected to one end of the mounting member 11, and the other extension end is connected to the rotating component 12.

[0037] In this embodiment, a fixed shaft 15 is provided at the other end of the mounting component 11. The rotating component 12 is sleeved on the fixed shaft 15. The fixed shaft 15 provides a stable fulcrum for the rotation of the rotating component 12, ensuring that the rotating component 12 can rotate smoothly around the fixed shaft 15. The main body of the torsion spring 14 is also sleeved on the fixed shaft 15, and its two extended ends are respectively connected to the rotating component 12 of the mounting component 11, so that the torsion spring 14 will also undergo torsional deformation when the rotating component 12 swings relative to the mounting component 11. Specifically, when the auxiliary wheel assembly 13 is subjected to an external force from the side wall of the external pipeline network, pushing the rotating component 12 to swing toward the mounting component 11, the torsion spring 14 will be torsioned and store elastic potential energy; when the external force disappears, the torsion spring 14 will rely on the stored elastic potential energy to drive the rotating component 12 back to the initial position. The torsion spring 14 provides an automatic reset function for the rotating component 12. When the engineering vehicle is located in a small pipe network, the torsion spring 14 will use its own elastic force to keep the auxiliary wheel assembly 13 in proper contact with the pipe wall. When the engineering vehicle needs to be placed in a larger pipe network, the torsion spring 14 can quickly pull the auxiliary wheel assembly 13 back to the appropriate position through its own restoring force, realizing the adaptive adjustment of the motion mechanism 10 and improving the working efficiency and reliability of the engineering vehicle.

[0038] like Figures 1 to 3 In one embodiment, the motion mechanism 10 includes two torsion springs 14, which are respectively sleeved on both ends of the fixed shaft 15 in the axial direction. One extension end of each torsion spring 14 is connected to one end of the mounting member 11, and the other extension end is connected to the rotating assembly 12.

[0039] In this embodiment, the motion mechanism 10 is provided with two torsion springs 14, which are symmetrically arranged at both ends of the fixed shaft 15 in the axial direction. Compared with the arrangement of a single torsion spring 14, the arrangement of two torsion springs 14 enhances the reset capability of the auxiliary wheel assembly 13, ensuring that the auxiliary wheel assembly 13 can be restored to a suitable contact state with the side wall of the pipeline in a timely manner, ensuring the normal operation of the engineering vehicle, and further improving the reliability of the motion mechanism 10.

[0040] like Figures 1 to 3 In one embodiment, the rotating assembly 12 includes a connecting rod 121 and two rotating arms 122. One end of the two rotating arms 122 on the same side is respectively sleeved on both ends of the fixed shaft 15 in the axial direction. A torsion spring 14 is pressed onto the surface of one rotating arm 122.

[0041] The other ends of the two rotating arms 122 on the same side are installed at intervals on one end of the connecting rod 121, and the other extension ends of the two torsion springs 14 are connected to the connecting rod 121. The auxiliary wheel assembly 13 is installed on the other end of the connecting rod 121.

[0042] In this embodiment, both rotating arms 122 are metal plate structures with through holes at both ends. Each rotating arm 122 is connected to the connecting rod 121 and the fixed shaft 15 through the two through holes. A torsion spring 14 is pressed onto the surface of one rotating arm 122 to prevent the rotating arm 122 from moving axially along the fixed shaft 15, thus improving the installation stability of the rotating arm 122. The lower end of the fixed shaft 15 is used to connect the auxiliary wheel assembly 13. When the two rotating arms 122 rotate around the fixed shaft 15 under the action of external force, the torsion spring 14 will twist, and its stored elastic potential energy will be transmitted to the connecting rod 121 through its connection with the connecting rod 121, thereby affecting the motion state of the entire auxiliary wheel 131. Through the combination of the two rotating arms 122 and the connecting rod 121, the rotating assembly 12 is more stable when transmitting motion, ensuring that the auxiliary wheel assembly 13 can flexibly and accurately adjust its position according to the changes in the size of the pipeline sidewall, thus improving the working stability of the motion mechanism 10.

[0043] like Figures 1 to 3 In one embodiment, a first connecting hole is provided at one end of the mounting member 11, a second connecting hole is provided on the outer periphery of the connecting rod 121, one extension end of the torsion spring 14 is inserted into the first connecting hole, and the other extension end of the torsion spring 14 is inserted into the second connecting hole.

[0044] In this embodiment, the first connecting hole and the second connecting hole are respectively opened at one end of the mounting member 11 and the outer periphery of the connecting rod 121, providing precise installation positions for the two extension ends of the torsion spring 14. The dimensions of the first connecting hole and the second connecting hole are adapted to the extension ends of the torsion spring 14. When installing the torsion spring 14, it is only necessary to insert the two extension ends of the torsion spring 14 into the corresponding first connecting hole and the second connecting hole to complete the connection. This reduces the assembly difficulty while ensuring installation stability. In addition, when the torsion spring 14 fails, maintenance personnel can easily pull the damaged torsion spring 14 out of the connecting hole and replace it with a new torsion spring 14 without having to disassemble the entire motion mechanism 10 on a large scale, thus improving the flexibility of the motion mechanism 10.

[0045] like Figures 1 to 3 In one embodiment, the motion mechanism 10 further includes a fastener 16 threadedly connected to the end of the connecting rod 121 away from the auxiliary wheel assembly 13 to fasten the connecting rod 121 and the rotating arm 122 away from the auxiliary wheel assembly 13.

[0046] In this embodiment, the fastener 16 can be a bolt or a nut. A threaded hole is provided at the end of the connecting rod 121 furthest from the auxiliary wheel assembly 13. By threading the fastener 16 onto the connecting rod 121, a stable connection structure is formed between the rotating arm 122 and the connecting rod 121 at this position. This ensures that the two can move in tandem when the motion mechanism 10 is working, effectively transmitting the force from the rotating arm 122 to the connecting rod 121, thereby driving the auxiliary wheel assembly 13 to work. This improves the overall motion stability of the motion mechanism 10.

[0047] like Figures 1 to 3 In one embodiment, the auxiliary wheel assembly 13 includes an auxiliary wheel 131 and a mounting rod 132. The other end of the connecting rod 121 is detachably mounted to one end of the mounting rod 132, and the other end of the mounting rod 132 is inserted into the auxiliary wheel 131.

[0048] In this embodiment, the auxiliary wheel 131 is used to directly contact and roll against the sidewall of the external pipeline network. Its material is generally chosen to be wear-resistant and elastic, such as rubber or polyurethane, to reduce damage from the pipeline sidewall and provide better adhesion, ensuring the engineering vehicle can operate stably near the pipeline sidewall. The mounting rod 132 connects the auxiliary wheel 131 to the connecting rod 121. One end of the mounting rod 132 is detachably connected to the other end of the connecting rod 121, such as by bolts or snap-fit ​​connections, facilitating the disassembly and replacement of the auxiliary wheel assembly 131 when needed. The other end of the mounting rod 132 is inserted into the auxiliary wheel 131, and the two can be connected through a slot or shaft hole fitting structure, ensuring a secure connection between the mounting rod 132 and the auxiliary wheel 131, ensuring effective force transmission during movement and driving the auxiliary wheel 131 to rotate normally. The design of the auxiliary wheel assembly 13 allows maintenance personnel to easily replace the auxiliary wheel 131 by simply separating the connecting rod 121 from the mounting rod 132 when the auxiliary wheel 131 wears or is damaged, without having to disassemble the entire motion mechanism 10 extensively. This also allows the auxiliary wheel assembly 13 to be flexibly adjusted according to different cleaning tasks and pipe wall conditions. If encountering pipe walls of special materials or shapes, different types of auxiliary wheels 131 may need to be replaced, improving the versatility and applicability of the motion mechanism 10.

[0049] like Figures 1 to 3 In one embodiment, the auxiliary wheel assembly 13 further includes a fixing member 133. One end of the mounting rod 132 is provided with a mounting groove 1321. The groove wall of the mounting groove 1321 is provided with a through hole. The fixing member 133 is threaded to the through hole so that the connecting rod 121 is inserted into the part of the rod body of the mounting rod 132 and fastened to the groove wall of the mounting groove 1321.

[0050] In this embodiment, the fixing member 133 can be a bolt, and one end of the mounting rod 132 can be hollow to form a mounting groove 1321. The through hole in the groove wall corresponds to a threaded hole, and the inner diameter of the through hole matches the outer diameter of the fixing member 133 to ensure that the fixing member 133 can be smoothly threaded into it. When the fixing member 133 is screwed into the through hole, its end can gradually approach and press the connecting rod 121 inserted into the mounting groove 1321, thereby firmly fixing the connecting rod 121 to the groove wall of the mounting groove 1321, ensuring that the auxiliary wheel assembly 13 can stably follow the rotating assembly 12 under various working conditions, thus improving the overall stability of the motion mechanism 10.

[0051] This utility model also proposes an engineering work vehicle, which includes a vehicle body 20 and a motion mechanism 10. The motion mechanism 10 is installed on the chassis of the vehicle body 20 and is used to abut against the external pipe wall. The specific structure of the motion mechanism 10 is as described in the above embodiments. Since the motion mechanism 10 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0052] Specifically, such as Figures 1 to 3 In this embodiment, the engineering work vehicle includes multiple motion mechanisms 10, which are spaced apart on one side of the chassis of the vehicle body 20 along the direction of movement of the engineering work vehicle. The arrangement of multiple motion mechanisms 10 enhances the movement stability of the engineering work vehicle in complex environments. When one motion mechanism 10 encounters a special situation of the pipe wall (such as a protrusion or depression), the other motion mechanisms 10 can still maintain normal contact with the pipe wall, continue to provide stable support and guidance for the engineering work vehicle, and ensure that the engineering work vehicle will not affect the overall operation due to local instability, thus greatly improving the working stability of the engineering work vehicle in complex environments.

[0053] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A motion mechanism applied to pipeline cleaning, characterized in that, The motion mechanism includes: The mounting component, one end of which is used to connect to the engineering work vehicle; A rotating assembly, one end of which is movably mounted to the other end of the mounting member; and An auxiliary wheel assembly is mounted at the other end of the rotating assembly and is used to abut against the side wall of the external pipeline network; The rotating component can swing relative to the mounting component to drive the auxiliary wheel assembly to adjust its distance from the side wall of the external pipeline network.

2. The motion mechanism as described in claim 1, characterized in that, The motion mechanism also includes a torsion spring, and the other end of the mounting member is provided with a fixed shaft. One end of the rotating component is rotatably connected to the fixed shaft. One extension end of the torsion spring is connected to one end of the mounting member, and the other extension end is connected to the rotating component.

3. The motion mechanism as described in claim 2, characterized in that, The motion mechanism includes two torsion springs, which are respectively sleeved on both ends of the fixed shaft along the axial direction. One extension end of each torsion spring is connected to one end of the mounting component, and the other extension end is connected to the rotating assembly.

4. The motion mechanism as described in claim 3, characterized in that, The rotating assembly includes a connecting rod and two rotating arms. One end of the two rotating arms on the same side is respectively sleeved on both ends of the fixed shaft in the axial direction. A torsion spring is pressed onto the surface of one of the rotating arms. The other ends of the two rotating arms on the same side are installed at intervals on one end of the connecting rod, the other extension ends of the two torsion springs are connected to the connecting rod, and the auxiliary wheel assembly is installed on the other end of the connecting rod.

5. The motion mechanism as described in claim 4, characterized in that, One end of the mounting component has a first connecting hole, the outer periphery of the connecting rod has a second connecting hole, one extension end of the torsion spring is inserted into the first connecting hole, and the other extension end of the torsion spring is inserted into the second connecting hole.

6. The motion mechanism as described in claim 4, characterized in that, The motion mechanism further includes a fastener threadedly connected to one end of the connecting rod away from the auxiliary wheel assembly to secure the connecting rod and the rotating arm away from the auxiliary wheel assembly.

7. The motion mechanism as described in claim 4, characterized in that, The auxiliary wheel assembly includes an auxiliary wheel and a mounting rod. The other end of the connecting rod is detachably mounted to one end of the mounting rod, and the other end of the mounting rod is inserted into the auxiliary wheel.

8. The motion mechanism as described in claim 7, characterized in that, The auxiliary wheel assembly also includes a fixing member. One end of the mounting rod has a mounting groove, and the groove wall of the mounting groove has a through hole. The fixing member is threaded into the through hole so that the connecting rod is inserted into the part of the mounting rod and fastened to the groove wall of the mounting groove.

9. An engineering work vehicle, characterized in that, The engineering work vehicle includes a vehicle body and a motion mechanism. The motion mechanism is the motion mechanism as described in any one of claims 1 to 8. The motion mechanism is installed on the chassis of the vehicle body and is used to abut against the side wall of the external pipeline network.

10. The engineering work vehicle as described in claim 9, characterized in that, The engineering work vehicle includes multiple motion mechanisms, which are spaced apart on one side of the chassis of the vehicle body along the direction of movement of the engineering work vehicle.