A hydraulic suspension for heavy-duty AGVs

Abstract

This utility model belongs to the field of heavy-duty AGV technology, specifically a hydraulic suspension for a heavy-duty AGV, including a suspension top plate, a suspension bottom plate, and a hydraulic shock absorber. The hydraulic shock absorber is installed between the suspension top plate and the suspension bottom plate, and is located at the corners of the suspension top plate and the suspension bottom plate. Fixed seats are welded to both ends of the surface of the suspension bottom plate, and a drive motor is mounted on the surface of the fixed seats. The power output end of the drive motor is connected to a load-bearing wheel. A guide hole is formed through the surface of the suspension top plate, and the guide hole is arranged around the surface of the suspension top plate. The guide rod and guide hole of this novel design guide the lifting and lowering of the suspension top plate, allowing the suspension top plate to move vertically to the suspension bottom plate. This prevents the torsional force generated by the suspension from being transmitted to the hydraulic shock absorber during the heavy-duty AGV's movement or turning, preventing damage to the oil seals on the hydraulic shock absorber and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty AGV technology, specifically a hydraulic suspension for heavy-duty AGVs. Background Technology

[0002] Heavy-duty AGVs are automated devices specifically designed for handling heavy goods, typically with a load capacity of 5 tons or more, and sometimes up to 200 tons. They are widely used in manufacturing, warehousing and logistics, ports and airports, and can significantly improve production and logistics efficiency.

[0003] The invention patent with publication number CN113291392B discloses a heavy-duty AGV system. The front vehicle has a front drive wheel assembly at the front end and a front follower wheel at the rear end. The rear vehicle has a rear steering wheel assembly at the front end and a rear drive wheel assembly and a rear follower wheel at the rear end. Both the front and rear vehicles are equipped with lifting mechanisms. The front drive wheel assembly includes a connecting plate, a left drive unit, a right drive unit, and a front power supply device. The connecting plate has a front disc bearing rotatably connected to the front vehicle. The left and right drive units drive different wheel segments to rotate. The rear steering wheel assembly includes a steering wheel drive component, a rear power supply device, and a steering wheel frame with steering wheel segments. The steering wheel frame has a rear disc bearing connected to the rear vehicle. The external gear of the rear disc bearing is driven to rotate through the steering wheel drive component. This invention allows both the front and rear vehicles to carry loads simultaneously, with the front vehicle driving forward and the rear vehicle being towed. The distance between the two vehicles can be automatically adjusted, and the lifting mechanism can automatically adjust the loading and unloading height of the heavy trucks.

[0004] In existing heavy-duty AGVs, the hydraulic shock absorber is subjected to a lateral force during driving or turning. The piston rod of the hydraulic shock absorber is sealed by a sealing ring. The lateral force can cause uneven stress on the sealing ring, which may be squeezed into the sealing gap, causing deformation, wear, or even tearing. The lateral force may also damage the fit between the sealing ring and the contact surface, resulting in uneven gaps and increasing the risk of leakage. All of these factors will affect the service life of the hydraulic shock absorber. To solve the above problems, this application proposes a hydraulic suspension for heavy-duty AGVs. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a hydraulic suspension for heavy-duty AGVs. The guide rod and guide hole are matched to guide the lifting and lowering of the suspension top plate, allowing the suspension top plate to move vertically to the suspension bottom plate. This avoids the torsional force generated by the suspension during the heavy-duty AGV's movement or turning from being transmitted to the hydraulic shock absorber, preventing damage to the oil seal on the hydraulic shock absorber due to stress, and extending the service life of the hydraulic shock absorber, thus solving the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides a hydraulic suspension for a heavy-duty AGV, including a suspension top plate, a suspension bottom plate, and a hydraulic shock absorber. The hydraulic shock absorber is installed between the suspension top plate and the suspension bottom plate, and is located at the corner of the suspension top plate and the suspension bottom plate. Fixed seats are welded to both ends of the surface of the suspension bottom plate, and a drive motor is installed on the surface of the fixed seats. The power output end of the drive motor is connected to a load-bearing wheel.

[0009] The suspension top plate has a through-hole, which is arranged around the surface of the suspension top plate. The guide holes are symmetrically distributed on each side of the suspension top plate.

[0010] Each of the guide holes has a guide rod movably inserted into its inner cavity, and the bottom of the guide rod is fixedly connected to the surface of the suspension base plate.

[0011] Each of the fixed bases is equipped with a buffer damping rod on its top surface, and the piston rod of each buffer damping rod is connected to a buffer rubber pad.

[0012] Preferably, the surface of the buffer pad is provided with anti-slip texture, and the buffer pad abuts against the lower surface of the suspension top plate after the suspension top plate is pressed down.

[0013] Preferably, a rotating gear is welded to the upper surface of the suspension top plate, and the rotating gear is used to be connected to the rotating drive structure of the heavy-duty AGV for transmission.

[0014] Preferably, a limiting plate is welded to the top of each guide rod.

[0015] Preferably, the surface of the buffer damping rod is provided with an adjusting thread, and an adjusting nut is threadedly connected to the surface of the buffer damping rod through the adjusting thread.

[0016] Preferably, each of the buffer damping rods is fitted with a buffer spring, which is located between the buffer pad and the adjusting nut.

[0017] Preferably, anti-collision plates are installed at both the front and rear of the suspension bottom plate, and the anti-collision plates protrude from the suspension top plate.

[0018] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0019] 1. In this utility model, when the hydraulic shock absorber is compressed, the guide rod and the guide hole can guide the lifting and lowering of the suspension top plate, so that the suspension top plate can move vertically to the suspension bottom plate. This can prevent the torsional force generated by the suspension from being transmitted to the hydraulic shock absorber during the walking or turning of the heavy-duty AGV, prevent the oil seal on the hydraulic shock absorber from being damaged by stress, and extend the service life of the hydraulic shock absorber.

[0020] 2. In this utility model, the top of the buffer damping rod contacts the lower surface of the suspension top plate through a buffer rubber pad, which increases the contact area between the piston rod of the buffer damping rod and the suspension top plate. By combining the buffer damping rod and the buffer spring, it can buffer the impact force on the suspension and improve the protection of the suspension. Rotating the adjusting nut allows the adjusting nut to move up and down on the buffer damping rod through the adjusting thread. When the adjusting nut is raised, it can compress the buffer spring, so that the buffer spring can generate greater support force to meet the buffering needs of goods of different weights. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the hydraulic suspension of a heavy-duty AGV according to the present invention;

[0022] Figure 2 This is a schematic diagram of the load wheel drive structure of the hydraulic suspension of a heavy-duty AGV according to the present invention.

[0023] Figure 3 This is a schematic diagram of the guide structure of the hydraulic suspension of a heavy-duty AGV according to the present invention;

[0024] Figure 4 This is a schematic diagram of the buffer structure of the hydraulic suspension of a heavy-duty AGV according to the present invention.

[0025] Figure label:

[0026] 1. Suspension top plate; 2. Suspension bottom plate; 3. Hydraulic shock absorber bar; 4. Mounting seat; 5. Drive motor; 6. Load-bearing wheel; 7. Rotary gear disc; 8. Guide hole; 9. Guide rod; 10. Limiting plate; 11. Anti-collision plate; 12. Buffer damping rod; 13. Buffer pad; 14. Buffer spring; 15. Adjusting thread; 16. Adjusting nut. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0028] like Figure 1-4As shown, the present invention proposes a hydraulic suspension for a heavy-duty AGV, comprising a suspension top plate 1, a suspension bottom plate 2, and a hydraulic shock absorber 3. The hydraulic shock absorber 3 is installed between the suspension top plate 1 and the suspension bottom plate 2, and is located at the corner of the suspension top plate 1 and the suspension bottom plate 2. Fixed seats 4 are welded to both ends of the surface of the suspension bottom plate 2, and a drive motor 5 is installed on the surface of the fixed seat 4. The power output end of the drive motor 5 is connected to a load-bearing wheel 6.

[0029] The surface of the suspension top plate 1 is provided with a guide hole 8, which is arranged around the surface of the suspension top plate 1, and the guide holes 8 on each side of the suspension top plate 1 are symmetrically distributed.

[0030] Each of the guide holes 8 has a guide rod 9 movably inserted into its inner cavity, and the bottom of the guide rod 9 is fixedly connected to the surface of the suspension base plate 2;

[0031] Each of the fixed seats 4 has a buffer damping rod 12 installed on its top surface. Each of the piston rods of the buffer damping rod 12 is connected to a buffer pad 13. The surface of the buffer pad 13 is provided with anti-slip texture. After the suspension top plate 1 is pressed down, the buffer pad 13 abuts against the lower surface of the suspension top plate 1.

[0032] It should be noted that the suspension top plate 1 and suspension bottom plate 2 are supported by hydraulic shock absorber rods 3. When the heavy-duty AGV is loaded, the weight is transmitted to the hydraulic shock absorber rods 3 through the suspension top plate 1. When the hydraulic shock absorber rods 3 are compressed, the guide rods 9 and guide holes 8 can guide the lifting and lowering of the suspension top plate 1, so that the suspension top plate 1 can move vertically to the suspension bottom plate 2. This can prevent the torsional force generated by the suspension from being transmitted to the hydraulic shock absorber rods 3 during the walking or turning of the heavy-duty AGV, prevent the oil seals on the hydraulic shock absorber rods 3 from being damaged by stress, and extend the service life of the hydraulic shock absorber rods 3.

[0033] In this embodiment, as Figure 1 As shown, a rotating gear 7 is welded to the upper surface of the suspension top plate 1. The rotating gear 7 is used to connect with the rotating drive structure of the heavy-duty AGV.

[0034] It should be noted that the rotary gear 7 is used to connect with the rotary drive structure of the heavy-duty AGV.

[0035] In this embodiment, as Figure 3 As shown, a limit plate 10 is welded to the top of each guide rod 9.

[0036] It should be noted that the limiting plate 10 can limit the top of the guide rod 9.

[0037] In this embodiment, as Figure 3As shown, the surface of the buffer damping rod 12 is provided with an adjusting thread 15, and the surface of the buffer damping rod 12 is threadedly connected to an adjusting nut 16 through the adjusting thread 15. A buffer spring 14 is sleeved on the surface of the buffer damping rod 12, and the buffer spring 14 is located between the buffer pad 13 and the adjusting nut 16.

[0038] It should be noted that the top of the buffer damping rod 12 contacts the lower surface of the suspension top plate 1 through the buffer pad 13, which increases the contact area between the piston rod of the buffer damping rod 12 and the suspension top plate 1. The buffer damping rod 12 and the buffer spring 14 work together to buffer the impact force on the suspension, thereby improving the protection of the suspension. Rotating the adjusting nut 16 allows the adjusting nut 16 to move up and down on the buffer damping rod 12 through the adjusting thread 15. When the adjusting nut 16 is raised, it can compress the buffer spring 14, so that the buffer spring 14 can generate greater support force to meet the buffering needs of goods of different weights.

[0039] In this embodiment, as Figure 1 As shown, anti-collision plates 11 are installed at both the front and rear of the suspension base plate 2, and the anti-collision plates 11 protrude from the suspension top plate 1.

[0040] It should be noted that the anti-collision plate 11 protrudes from the top plate of the suspension and can play a role in preventing collisions during the operation of the heavy-duty AGV.

[0041] The working principle and usage process of this utility model: The suspension top plate 1 and the suspension bottom plate 2 are supported by a hydraulic shock absorber 3. When the heavy-duty AGV is loaded, the weight is transmitted to the hydraulic shock absorber 3 through the suspension top plate 1. When the hydraulic shock absorber 3 is compressed, the guide rod 9 and the guide hole 8 can guide the lifting and lowering of the suspension top plate 1, allowing the suspension top plate 1 to move vertically to the suspension bottom plate 2. This avoids the torsional force generated by the suspension during the heavy-duty AGV's walking or turning process from being transmitted to the hydraulic shock absorber 3, preventing damage to the oil seal on the hydraulic shock absorber 3 due to stress, and extending the service life of the hydraulic shock absorber 3. When the hydraulic shock absorber 3 suddenly loses pressure, the suspension top plate... When plate 1 suddenly drops, the suspension top plate 1 will press against the buffer damping rod 12. The top of the buffer damping rod 12 contacts the lower surface of the suspension top plate 1 through the buffer pad 13, which increases the contact area between the piston rod of the buffer damping rod 12 and the suspension top plate 1. The buffer damping rod 12 and the buffer spring 14 work together to buffer the impact force on the suspension, thus improving the protection of the suspension. Rotate the adjusting nut 16. The adjusting nut 16 moves up and down on the buffer damping rod 12 through the adjusting thread 15. When the adjusting nut 16 is raised, it can compress the buffer spring 14, so that the buffer spring 14 can generate greater support force to meet the buffering needs of different weights of goods.

[0042] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims or their equivalents.

Claims

1. A hydraulic suspension for a heavy-duty AGV, comprising a suspension top plate (1), a suspension bottom plate (2), and a hydraulic shock absorber (3), wherein the hydraulic shock absorber (3) is installed between the suspension top plate (1) and the suspension bottom plate (2), and the hydraulic shock absorber (3) is located at the corner of the suspension top plate (1) and the suspension bottom plate (2), characterized in that, The suspension base plate (2) has fixed seats (4) welded to both ends of its surface. A drive motor (5) is mounted on the surface of the fixed seat (4). The power output end of the drive motor (5) is connected to a load wheel (6). The suspension top plate (1) has a through guide hole (8) on its surface. The guide hole (8) is arranged around the surface of the suspension top plate (1), and the guide holes (8) on each side of the suspension top plate (1) are symmetrically distributed. Guide rods (9) are movably inserted into the inner cavity of each guide hole (8), and the bottom of the guide rods (9) is fixedly connected to the surface of the suspension base plate (2); Each of the fixed bases (4) is equipped with a buffer damping rod (12) on its top surface, and the top of the piston rod of each buffer damping rod (12) is connected to a buffer rubber pad (13).

2. The hydraulic suspension of a heavy-duty AGV according to claim 1, characterized in that, The surface of the buffer pad (13) is provided with anti-slip texture, and the buffer pad (13) abuts against the lower surface of the suspension top plate (1) after the suspension top plate (1) is pressed down.

3. The hydraulic suspension of a heavy-duty AGV according to claim 2, characterized in that, The upper surface of the suspension top plate (1) is welded with a rotating gear disk (7), which is used to be connected to the rotating drive structure of the heavy-duty AGV.

4. The hydraulic suspension of a heavy-duty AGV according to claim 3, characterized in that, Each guide rod (9) has a limit plate (10) welded to its top.

5. The hydraulic suspension of a heavy-duty AGV according to claim 4, characterized in that, The surface of the buffer damping rod (12) is provided with an adjustment thread (15), and an adjustment nut (16) is threadedly connected to the surface of the buffer damping rod (12) through the adjustment thread (15).

6. The hydraulic suspension of a heavy-duty AGV according to claim 5, characterized in that, Each of the buffer damping rods (12) is fitted with a buffer spring (14), which is located between the buffer pad (13) and the adjusting nut (16).

7. The hydraulic suspension of a heavy-duty AGV according to claim 6, characterized in that, Anti-collision plates (11) are installed at the front and rear of the suspension base plate (2), and the anti-collision plates (11) protrude from the suspension top plate (1).

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