Shock absorption structure for AGV steering wheel

Abstract

The utility model relates to the technical field of AGV transportation equipment, in particular to a shock absorption structure for AGV steering wheels. The shock absorption structure for the AGV steering wheel is arranged between a supporting table and a wheel carrier of a power wheel set. The supporting table is provided with a mounting part used for being connected with a frame, and the mounting part is constructed to be connected with the frame through a rotating shaft. The shock absorption structure comprises a pair of shock absorption units which are symmetrically arranged along the axis of the rotating shaft. The damping unit comprises a telescopic guide column and a compression spring, and the telescopic guide column is configured to axially compress the compression spring along with fluctuation of the supporting table. One end of the telescopic guide column is hinged to the supporting table, and the other end of the telescopic guide column is hinged to the wheel carrier. The compression spring and the telescopic guide column are coaxially arranged, and the telescopic guide column has the telescopic freedom degree in the axial direction of the compression spring. According to the shock absorption structure for the AGV steering wheel, the steering stability is guaranteed, and particularly, the steering function of the steering wheel is guaranteed when a frame is in a no-load state.

Description

Technical Field

[0001] This utility model relates to the field of AGV transportation equipment technology, and specifically to a shock-absorbing structure for AGV steering wheels. Background Technology

[0002] In the fields of modern logistics and industrial automation, AGVs (Automated Guided Vehicles) play a crucial role. AGVs can automatically travel along preset paths to perform material handling and transportation tasks, effectively improving production and logistics efficiency.

[0003] Existing AGV steering wheels either lack vibration damping design or, even if they do have damping, are only suitable for light-load scenarios. In heavy-load usage scenarios, existing steering wheels reveal numerous shortcomings. For example, in relatively flat operating conditions such as paved roads, the transport vehicle has lower requirements for vibration damping, so steering wheels without damping or with light-load damping can still meet basic operational requirements.

[0004] However, in the non-standard road environment of the factory area, AGV transport vehicles need to move autonomously and may traverse various undulating sections. At this time, the shock absorption defects of existing transport vehicles become apparent, as they are unable to withstand the impact and pressure brought by heavy loads. This not only affects the stability of transportation but also damages the overall structure of the vehicle and the lifespan of its components.

[0005] Furthermore, the existing AGV's shock absorber suspension is mounted on the power frame, which introduces specific steering issues. When the AGV is fully loaded, the steering wheel maintains good contact with the ground, ensuring smooth steering. However, when unloaded, the steering wheel may lift off the ground due to suspension rebound. Once the steering wheel loses contact with the ground, the vehicle struggles to maintain normal steering, significantly limiting the AGV's flexibility and reliability in practical applications, and reducing its applicability and efficiency under various working conditions. Summary of the Invention

[0006] The purpose of this invention is to provide a shock-absorbing structure for AGV transport vehicles during operation, so as to ensure the stability of steering, especially when the vehicle frame is unloaded, to ensure the steering function of the steering wheel.

[0007] To achieve the above objectives, the present invention adopts the following solution:

[0008] A shock-absorbing structure for an AGV steering wheel, wherein the shock-absorbing structure is disposed between the support platform and the wheel frame of the power wheel assembly;

[0009] The support platform is provided with a mounting part for connecting the vehicle frame, and the mounting part is configured to be connected to the vehicle frame via a pivot.

[0010] The shock absorption structure includes a pair of damping units, which are symmetrically arranged along the axis of rotation.

[0011] The damping unit includes a telescopic guide column and a compression spring. The telescopic guide column is configured to axially compress the compression spring as the support platform undulates. One end of the telescopic guide column is hinged to the support platform, and the other end is hinged to the wheel frame. The compression spring is coaxially arranged with the telescopic guide column, and the telescopic guide column has a degree of freedom to extend and retract along the axial direction of the compression spring.

[0012] Preferably, the power wheel set also includes a travel motor and wheels. The travel motor is mounted on the wheel frame, and the wheels are mounted on the output end of the travel motor. The wheel frame is provided with a support end and a buffer end, which are located on both sides of the travel motor. The telescopic guide column is hinged to the buffer end of the wheel frame.

[0013] Preferably, a pair of drive wheels are symmetrically arranged along the axis of the shaft, and a connecting shaft is provided between the pair of drive wheels. The end of the connecting shaft is connected to the support end of the wheel frame, and a column for connecting the support platform is provided on the side wall of the connecting shaft.

[0014] Preferably, the telescopic guide post includes a first guide post and a second guide post. The end of the first guide post is hinged to the support platform, and the end of the second guide post is hinged to the wheel frame. The second guide post has a telescopic channel inside, and the first guide post is embedded in the telescopic channel.

[0015] Preferably, a limiting structure is provided in the telescopic channel, and the limiting structure is configured to axially limit the first guide post.

[0016] Preferably, both the first guide post and the second guide post are provided with retaining rings on their side walls, and a buffer space for arranging compression springs is formed between a pair of retaining rings.

[0017] Preferably, the limiting structure includes a limiting step and a pressure ring. The limiting step is arranged on the inner wall of the telescopic channel, and the pressure ring is configured to cooperate with the limiting step to form an axial limit on the first guide post. The pressure ring is installed at the end of the first guide post by fasteners.

[0018] Preferably, a tie rod is provided between a pair of drive wheels, and the tie rod is located at the buffer end of the wheel frame.

[0019] Compared with the prior art, the shock-absorbing structure for AGV steering wheels provided by this utility model has the following substantial features and advancements: This shock-absorbing structure for AGV steering wheels is arranged between the support platform and the wheel frame of the power wheel assembly. Utilizing the damping unit, it deforms according to the vibration of the wheel frame, effectively absorbing and buffering vibration energy through its elastic properties. This significantly reduces the transmission of vibration to the support platform and frame, protecting the frame and onboard equipment from excessive vibration damage. It improves the stability and reliability of AGV operation, reduces the risk of equipment failure due to vibration, and helps extend equipment lifespan and improve working accuracy. When the frame is unloaded, the damping unit continuously applies downward pressure to the wheel frame, ensuring the wheels maintain good contact with the ground, preventing wheel lift-off due to unloaded conditions. This guarantees effective driving and braking of the AGV under various load conditions, improving the safety and maneuverability of AGV operation. Whether starting, stopping, or turning, it can stably execute actions, enhancing the overall operating performance and adaptability of the AGV. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a shock-absorbing structure for an AGV steering wheel in an embodiment of this utility model.

[0021] Figure 2 yes Figure 1 A three-dimensional structural diagram of a shock-absorbing structure used for AGV steering wheels from another perspective.

[0022] Figure 3 yes Figure 1 The main view.

[0023] Figure 4 This is a schematic diagram of the assembly structure of the shock absorption unit in an embodiment of this utility model.

[0024] Figure 5 yes Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0025] Reference numerals: 1. Drive wheel assembly; 11. Wheel frame; 12. Travel motor; 13. Wheel; 14. Connecting shaft; 15. Column; 21. Shock absorption unit; 22. Tie rod; 31. Support platform; 32. Mounting part; 211. Telescopic guide column; 212. Compression spring; 2111. First guide column; 2112. Second guide column; 2113. Retaining ring; 2114. Telescopic channel; 2115. Limiting step; 2116. Pressure ring. Detailed Implementation

[0026] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] like Figures 1-5As shown in the embodiment of this utility model, a shock-absorbing structure for AGV steering wheels is proposed, which aims to ensure the stability of steering during the operation of AGV transport vehicles, especially to ensure the steering function of the steering wheels when the vehicle frame is unloaded.

[0028] like Figure 1 Combination Figure 2 As shown, a shock-absorbing structure for an AGV steering wheel is disposed between a support platform 31 and the wheel frame 11 of the power wheel set 1. The support platform 31 is provided with a mounting portion 32 for connecting to the vehicle frame. The mounting portion 32 is configured to be connected to the vehicle frame via a pivot.

[0029] like Figure 3 Combination Figure 4 As shown, the vibration damping structure includes a pair of damping units 21. The pair of damping units 21 are symmetrically arranged along the axis of rotation. Each damping unit 21 includes a telescopic guide post 211 and a compression spring 212. The telescopic guide post 211 is configured to axially compress the compression spring 212 as the support platform 31 undulates. One end of the telescopic guide post 211 is hinged to the support platform 31, and the other end is hinged to the wheel frame 11. The compression spring 212 is coaxially arranged with the telescopic guide post 211. The telescopic guide post 211 has a degree of freedom of extension and retraction along the axis of the compression spring 212.

[0030] The power wheel set 1 also includes a travel motor 12 and wheels 13. The travel motor 12 is mounted on the wheel frame 11. The wheels 13 are mounted on the output end of the travel motor 12. The wheel frame 11 is provided with a support end and a buffer end, which are located on both sides of the travel motor 12. The telescopic guide post 211 is hinged to the buffer end of the wheel frame 11.

[0031] like Figure 3 As shown, a pair of drive wheel sets 1 are symmetrically arranged along the axis of the shaft. Figure 2 As shown, a connecting shaft 14 is provided between a pair of drive wheel sets 1. The end of the connecting shaft 14 is connected to the support end of the wheel frame 11. A column 15 for connecting the support platform 31 is provided on the side wall of the connecting shaft 14.

[0032] like Figure 4 As shown, a tie rod 22 is provided between a pair of power wheel sets 1. The tie rod 22 is located at the buffer end of the wheel frame 11. The tie rod 22 can enhance the connection rigidity between the power wheel sets 1. When the AGV is traveling at high speed, frequently turning, or running on uneven roads, it can effectively prevent the wheel frame 11 from excessive deformation or displacement due to uneven force. The tie rod 22 works in conjunction with the shock absorption structure to maintain the relative stability of the wheel set while buffering vibrations, making the power transmission smoother and more efficient. This can significantly improve the driving safety and reliability of the AGV and reduce the risk of loss of control due to unstable wheel set structure.

[0033] In this way, the compression spring 212, in conjunction with the telescopic guide column 211, can flexibly compress axially according to the undulations of the support platform 31. When the AGV travels on bumpy roads, the spring can effectively absorb the impact force from the road surface, converting it into elastic potential energy and releasing it gradually, thereby significantly reducing the vibration transmitted to the chassis and cargo. For example, in factory workshops, there may be weld seams, potholes, or debris on the floor. This shock-absorbing unit 21 allows the AGV to pass smoothly, reducing the risk of cargo damage due to vibration. It is especially suitable for transporting precision electronic components, fragile items, and other vibration-sensitive goods, ensuring transportation quality and product integrity.

[0034] One end of the telescopic guide column 211 is hinged to the support platform 31, and the other end is hinged to the buffer end of the wheel frame 11, and it has the freedom to extend and retract along the axis of the compression spring 212. This not only ensures that the shock absorption unit 21 can work normally under different road conditions, but also provides stable support and guidance for the wheel frame 11. During the AGV's turning, acceleration, or braking, the various forces on the wheel frame 11 can be reasonably dispersed and guided through the telescopic guide column 211, avoiding excessive lateral or side displacement of the wheel frame 11, ensuring the relative positional stability between the power wheel set 1 and the frame, and thus improving the AGV's handling performance and driving safety.

[0035] For example, such as Figure 3 As shown, a diagonal spring is used to distribute the vertical force. The initial angle between the damping unit 21 and the support platform 31 is 45 degrees, which facilitates the damping structure to generate greater downforce to the power wheel set 1 within a shorter working stroke.

[0036] like Figure 4 Combination Figure 5 As shown, the telescopic guide column 211 includes a first guide column 2111 and a second guide column 2112. The end of the first guide column 2111 is hinged to the support platform 31. The end of the second guide column 2112 is hinged to the buffer end of the wheel frame 11. Retaining rings 2113 are provided on the side walls of both the first guide column 2111 and the second guide column 2112. A telescopic channel 2114 is provided inside the second guide column 2112. The first guide column 2111 is embedded in the telescopic channel 2114, and a buffer space for arranging compression springs 212 is formed between the pair of retaining rings 2113. The telescopic guide column 211 structure composed of the first guide column 2111 and the second guide column 2112 brings significant advantages to the AGV in terms of vibration damping coordination, structural stability, convenient maintenance, and overall performance improvement.

[0037] The first guide post 2111 is hinged to the support platform 31, and the second guide post 2112 is hinged to the buffer end of the wheel frame 11. This separate connection method allows for better adaptation to impact forces of different directions and intensities during shock absorption. Whether it is pressure changes transmitted from the upper frame or vibration impacts caused by road bumps below, the two guide posts can each play their roles and cooperate in a coordinated manner. For example, when one wheel 13 of the AGV encounters a large bump, the corresponding second guide post 2112 can sense and transmit the force change first, and buffer it through the compression spring 212. At the same time, the first guide post 2111 can also adjust according to the force of the overall structure, stably supporting and guiding the shock absorption process, thereby making the response of the entire shock absorption unit 21 more sensitive and precise, further improving the shock absorption effect, and ensuring the smooth operation of the AGV under complex road conditions.

[0038] Secondly, retaining rings 2113 are provided on the side walls of both the first guide post 2111 and the second guide post 2112, and the first guide post 2111 is embedded in the telescopic channel 2114 of the second guide post 2112. A buffer space is formed between the retaining rings 2113 for accommodating the compression spring 212. This nested structure combined with the retaining rings 2113 effectively limits the extension and contraction range of the spring, preventing abnormal situations such as dislocation or twisting of the spring during excessive compression or stretching. During long-term operation of the AGV, even if it frequently encounters strong vibrations or impacts, the structure of the shock absorption unit 21 can still maintain its integrity and stability, avoiding shock absorption failure or other safety hazards caused by component misalignment. This greatly improves the reliability of the entire AGV steering wheel system, reduces downtime for maintenance due to shock absorption structure failure, and ensures the continuity of production and logistics operations.

[0039] like Figure 5 As shown, a limiting structure is provided within the telescopic channel 2114. This limiting structure is configured to axially limit the first guide post 2111. The limiting structure precisely limits the axial movement range of the first guide post 2111 within the telescopic channel 2114, thus strictly controlling the compression and rebound stroke of the compression spring 212. This makes the damping effect of the shock-absorbing unit 21 highly predictable and consistent when facing impact forces of varying intensities.

[0040] For example, when the AGV travels over known bumpy roads or obstacles, the limiting structure can ensure that the shock absorption unit 21 always performs shock absorption according to the preset stroke, avoiding unstable shock absorption performance caused by excessive compression or extension of the spring, thereby providing the AGV with a continuous, reliable, and smooth driving experience, ensuring the stability and safety of cargo transportation in both regular operations and special working conditions.

[0041] Meanwhile, the limiting structure enhances the structure's impact resistance. In extreme impact situations, such as when the AGV suddenly collides with a large obstacle while traveling at high speed, the limiting structure effectively prevents the first guide column 2111 from being dislodged from its normal working position due to excessive impact force, avoiding structural damage to the entire shock absorption unit 21 and even the steering wheel system. As a crucial protective barrier, it shares and bears part of the impact force, distributing the force evenly across the entire shock absorption structure and surrounding connecting components. This significantly improves the structural integrity and resistance to damage of the AGV steering wheel under high-intensity impacts, reduces serious equipment failures and maintenance costs caused by accidental impacts, extends the service life of the equipment, and ensures the long-term stable operation of the AGV in complex industrial environments.

[0042] For example, such as Figure 5 As shown, the limiting structure includes a limiting step 2115 and a pressure ring 2116. The limiting step 2115 is disposed on the inner wall of the telescopic channel 2114. The pressure ring 2116 is configured to cooperate with the limiting step 2115 to form an axial limit on the first guide post 2111. The pressure ring 2116 is installed at the end of the first guide post 2111 by fasteners.

[0043] In this way, the limiting step 2115 is directly installed on the inner wall of the telescopic channel 2114, and the pressure ring 2116 is installed at the end of the first guide post 2111 by fasteners to cooperate with the limiting step 2115. This design makes the construction of the limiting structure relatively simple, without the need for complex mechanical devices or precision electronic components. In the manufacturing process of AGV, it can be processed and assembled more easily, reducing production costs and difficulties, and improving production efficiency.

[0044] This utility model is not limited to the specific technical solutions described in the above embodiments. Besides the above embodiments, this utility model may have other implementation methods. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shock-absorbing structure for an AGV steering wheel, characterized in that, The shock-absorbing structure is arranged between the support platform (31) and the wheel frame (11) of the power wheel set (1); The support platform (31) is provided with a mounting part (32) for connecting the frame, and the mounting part (32) is configured to be connected to the frame via a pivot. The shock absorption structure includes a pair of shock absorption units (21), which are symmetrically arranged along the axis of rotation. The damping unit (21) includes a telescopic guide post (211) and a compression spring (212). The telescopic guide post (211) is configured to axially compress the compression spring (212) as the support platform (31) undulates. One end of the telescopic guide post (211) is hinged to the support platform (31), and the other end of the telescopic guide post (211) is hinged to the wheel frame (11). The compression spring (212) is coaxially arranged with the telescopic guide post (211), and the telescopic guide post (211) has a degree of freedom of extension and retraction along the axial direction of the compression spring (212).

2. The shock-absorbing structure for AGV steering wheels according to claim 1, characterized in that, The power wheel set (1) also includes a walking motor (12) and a wheel (13). The walking motor (12) is mounted on the wheel frame (11), and the wheel (13) is mounted on the output end of the walking motor (12). The wheel frame (11) is provided with a support end and a buffer end. The support end and the buffer end are located on both sides of the walking motor (12). The telescopic guide column (211) is hinged to the buffer end of the wheel frame (11).

3. The shock-absorbing structure for AGV steering wheels according to claim 2, characterized in that, A pair of drive wheel sets (1) are symmetrically arranged along the axis of the rotating shaft. A connecting shaft (14) is provided between the pair of drive wheel sets (1). The end of the connecting shaft (14) is connected to the support end of the wheel frame (11). A column (15) for connecting the support platform (31) is provided on the side wall of the connecting shaft (14).

4. The shock-absorbing structure for AGV steering wheels according to claim 1, characterized in that, The telescopic guide post (211) includes a first guide post (2111) and a second guide post (2112). The end of the first guide post (2111) is hinged to the support platform (31), and the end of the second guide post (2112) is hinged to the wheel frame (11). The second guide post (2112) has a telescopic channel (2114) inside, and the first guide post (2111) is embedded in the telescopic channel (2114).

5. The shock-absorbing structure for an AGV steering wheel according to claim 4, characterized in that, The telescopic channel (2114) is provided with a limiting structure, which is configured to axially limit the first guide post (2111).

6. The shock-absorbing structure for an AGV steering wheel according to claim 4, characterized in that, The first guide post (2111) and the second guide post (2112) are each provided with a retaining ring (2113), and a buffer space for arranging the compression spring (212) is formed between a pair of retaining rings (2113).

7. The shock-absorbing structure for an AGV steering wheel according to claim 5, characterized in that, The limiting structure includes a limiting step (2115) and a pressure ring (2116). The limiting step (2115) is arranged on the inner wall of the telescopic channel (2114). The pressure ring (2116) is configured to cooperate with the limiting step (2115) to form an axial limit on the first guide post (2111). The pressure ring (2116) is installed at the end of the first guide post (2111) by fasteners.

8. The shock-absorbing structure for an AGV steering wheel according to claim 1, characterized in that, A tie rod (22) is provided between a pair of drive wheels (1), and the tie rod (22) is located at the buffer end of the wheel frame (11).

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