Axle floating control valve group

Abstract

The utility model discloses an axle floating control valve group which comprises two groups of driving rollers, a floating bridge frame arranged between the driving rollers, two groups of swing frames arranged at the bottom of the floating bridge frame and a turnover frame connected with the driving rollers through the swing frames, and hydraulic cylinders are arranged at the tops of the swing frames in a turnover mode. The end of the hydraulic cylinder and the overturning frame are connected and installed through a connecting frame, a balance valve is fixedly installed on the hydraulic cylinder, and two sets of flow guide holes are formed in the balance valve. According to the hydraulic cylinder, the flowing flow between the connecting opening and the mounting through opening can be controlled by controlling the oil pressure guided into the flow guide hole, so that the pushing force of the hydraulic cylinder is controlled while the oil pressure in the whole oil injection process of the hydraulic cylinder is balanced, and the stability of the hydraulic cylinder in the pushing process under the controllable condition is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of aerial work platform vehicle axle technology, specifically relating to a vehicle axle floating control valve group. Background Technology

[0002] Aerial work platforms are mobile work platforms used for various industries, including high-altitude operations, equipment installation, and maintenance. The main types of aerial work platforms include: scissor lifts, trailer-mounted aerial work platforms, articulated boom lifts, telescopic boom lifts, aluminum alloy aerial work platforms, telescopic boom lifts, and spider lifts. The axles of an aerial work platform are similar to those of a car axles (also known as vehicle axles), connected to the chassis (or monocoque body) via the suspension, with wheels mounted at both ends. The function of the axle is to bear the load of the vehicle and maintain its normal movement on the road.

[0003] Domestic utility model patent application number 202222418601.7 discloses a telescopic hydraulic cylinder balance valve assembly, including a balance valve assembly body. Two grooves are symmetrically formed at both the upper and lower ends of the balance valve assembly body. A straight pipe is provided at the outer end of the groove and extends into the groove. An outer cylinder is fixed at the lower end of the straight pipe and extends into the outer cylinder. The outer cylinder is located within the groove. A circular ring is provided at the inner end of the outer cylinder, and the circular ring is located on the bottom wall inside the groove. A movable ring is slidably connected inside the outer cylinder, and the movable ring is located on the inner side of the straight pipe. A hemispherical metal mesh is fixed to the inner wall of the movable ring, and the protrusions of the hemispherical metal mesh are arranged facing the straight pipe. Multiple elastic elements are installed equidistantly between the movable ring and the circular ring in a circular arrangement. This design utilizes the elastic force of the spring to offset the impact force when hydraulic oil impacts the hemispherical metal mesh, achieving the purpose of buffering the impact force generated during hydraulic oil switching, improving service life, and providing good stability. The aforementioned utility model utilizes the elastic force of a spring to offset the impact force, thereby buffering the impact force generated during hydraulic oil switching. However, existing hydraulic cylinders, when pushing to control the floating state of the axle, require a balance valve to control and balance the oil pressure in the guide oil to ensure the stability of the oil pressure during cylinder pushing. Relying solely on the elastic force of a spring to buffer and balance the oil pressure is insufficient to ensure consistent oil pressure input to the cylinder, leading to unstable oil pressure during cylinder pushing and causing the axle to float and sway. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a floating control valve group for a vehicle axle, including two sets of drive rollers, a floating bridge frame installed between the drive rollers, two sets of swing frames installed at the bottom of the floating bridge frame, and a tilting frame connected to the drive rollers through the swing frames. A hydraulic cylinder is tilted and installed on the top of the swing frame, and the end of the hydraulic cylinder is connected to the tilting frame through a connecting frame. A balance valve is fixedly installed on the hydraulic cylinder, and the balance valve has two sets of guide holes.

[0005] During the operation of the work vehicle, the drive roller is retracted and extended by the hydraulic cylinder, ensuring that the drive roller is lowered when the work vehicle is fully loaded and retracted when it is unloaded.

[0006] As a further preferred technical solution of this utility model; a wheel body is installed on the drive roller, the floating bridge and the drive roller are connected and installed by a connecting rod, and a shock absorber is installed on the outer ring between the hydraulic cylinder and the connecting frame.

[0007] When the hydraulic cylinder pushes the connecting frame, the connecting frame and the tilting frame cooperate with each other, and the shock absorber ensures the stability of the drive roller during the raising and lowering process.

[0008] As a further preferred technical solution of this utility model; a valve disc is slidably installed inside the balance valve, and a pushing part is provided at the position where the valve disc fits against the inner wall of the balance valve, and the pushing part is located at the end of the guide hole. A limiting part for blocking oil is provided on the inner wall of the balance valve on one side of the guide hole.

[0009] When the balance valve balances the oil injected into the hydraulic cylinder, oil is continuously injected into the balance valve through the guide hole, so that the oil injected into the guide hole pushes the pusher, causing the valve disc to move to one end.

[0010] As a further preferred technical solution of this utility model, a positioning rod is fixedly installed inside the balance valve on one side of the valve disc, and a connecting spring is fixedly installed around the outside of the positioning rod.

[0011] The positioning purpose is achieved by setting a positioning rod, and the connecting spring assists in resetting during the positioning process.

[0012] As a further preferred technical solution of this utility model; one end of the balance valve is provided with a connection port, two sets of installation ports are provided on the outside of the balance valve, and an oil guide port is provided on the valve disc located at the installation port position. A valve stem is slidably installed inside the valve disc at one end of the connection port. A flow guide spring is installed around the outside of one end of the valve stem, and a limiting block is provided on the valve disc on one side of the flow guide spring to limit its movement.

[0013] When oil is continuously injected into the balance valve through the guide hole, the oil inside the guide hole pushes the pusher, causing the valve disc to move to one end. At this point, the valve stem end contacts the positioning rod end, and the valve disc compresses the connecting spring, causing the valve disc end to open with the other end of the valve stem, thus allowing flow between the connection port and the installation port.

[0014] As a further preferred technical solution of this utility model; one end of the valve disc is provided with a blocking part, and one end of the valve stem is installed with a blocking block. The blocking block and the blocking part are fitted together by an oil guiding inclined surface, and an oil guiding channel is provided inside the balance valve at one end of the connection port.

[0015] The sealing effect of the connection is ensured by fitting the barrier and the oil guide bevel together.

[0016] As a further preferred technical solution of this utility model, a pressure relief hole is provided on the valve disc on one side of the oil guide port.

[0017] The pressure relief hole facilitates the flow of oil during the connection and installation process, thereby rationally distributing the flow of oil through the balance valve.

[0018] Beneficial effects

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. When oil is continuously injected into the balance valve through the guide hole, the oil inside the guide hole pushes the pusher, causing the valve disc to move to one end. At this point, the valve stem end contacts the positioning rod end, and the valve disc compresses the connecting spring, causing the valve disc end to open with the other end of the valve stem. This allows flow between the connection port and the mounting port. The flow rate between the connection port and the mounting port affects the oil pressure injected into the hydraulic cylinder, thus affecting the hydraulic cylinder's pushing force. The flow rate between the connection port and the mounting port can be controlled by controlling the oil pressure in the guide hole. This balances the oil pressure throughout the hydraulic cylinder's injection process while controlling the hydraulic cylinder's pushing force, ensuring stability during the hydraulic cylinder's pushing process under controllable conditions.

[0021] 2. During the operation of the work vehicle, the drive roller is retracted and extended by the hydraulic cylinder. When the work vehicle is fully loaded, the drive roller is lowered to enable the axle to bear the load and reduce the single axle pressure of the whole vehicle on the ground. When unloaded, the drive roller is retracted and does not bear the load, thereby reducing the driving resistance of the whole vehicle and tire wear. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the axle of this utility model;

[0023] Figure 2This is a top view cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a side sectional view of the present invention.

[0025] Figure 4 for Figure 2 A magnified structural diagram of point A in the middle.

[0026] In the diagram: 1. Drive roller; 11. Wheel body; 2. Floating bridge; 21. Connecting rod; 22. Tilting frame; 23. Swing frame; 3. Hydraulic cylinder; 31. Connecting frame; 32. Shock absorber; 4. Balance valve; 41. Positioning rod; 42. Connecting spring; 43. Guide hole; 431. Limiting part; 44. Valve disc; 441. Pushing part; 442. Oil guide port; 443. Limiting block; 444. Blocking part; 445. Pressure relief hole; 45. Valve stem; 451. Blocking block; 452. Oil guide slope; 453. Guide spring; 46. Connection port; 461. Oil guide channel; 47. Installation port. Detailed Implementation

[0027] This specific embodiment is a floating control valve group for a vehicle axle.

[0028] The aforementioned utility model utilizes the elastic force of a spring to offset the impact force, thereby buffering the impact force generated during hydraulic oil switching. However, existing hydraulic cylinders, when pushing to control the floating state of the axle, require a balance valve to control and balance the oil pressure in the guide oil to ensure the stability of the oil pressure during cylinder pushing. Relying solely on the elastic force of a spring to buffer and balance the oil pressure is insufficient to ensure consistent oil pressure input to the cylinder, leading to unstable oil pressure during cylinder pushing and causing the axle to float and sway.

[0029] Its structural diagram is as follows Figures 1-4 As shown. A floating control valve assembly for a vehicle axle includes two sets of drive rollers 1, a floating bridge frame 2 installed between the drive rollers 1, two sets of swing frames 23 installed at the bottom of the floating bridge frame 2, and a tilting frame 22 connected to the drive rollers 1 via the swing frames 23. Wheels 11 are mounted on the drive rollers 1. The floating bridge frame 2 and the drive rollers 1 are connected by a connecting rod 21. A shock absorber 32 is installed around the outer ring between the hydraulic cylinder 3 and the connecting frame 31. When the hydraulic cylinder 3 pushes the connecting frame 31, the connecting frame 31 and the tilting frame 22 cooperate with each other, and the shock absorber 32 ensures the stability of the drive rollers 1 during the raising and lowering process. During the operation of the vehicle, the hydraulic cylinder 3 raises and lowers the drive rollers 1, ensuring that when the vehicle is fully loaded, the drive rollers 1 are lowered to utilize the axle's load-bearing function and reduce the single-axle pressure of the vehicle on the ground; when unloaded, the drive rollers 1 are raised, not utilizing their load-bearing function, reducing the vehicle's driving resistance and tire wear.

[0030] A hydraulic cylinder 3 is mounted on the top of the swing frame 23, and the end of the hydraulic cylinder 3 is connected to the swing frame 22 via a connecting frame 31. A balance valve 4 is fixedly mounted on the hydraulic cylinder 3, and the balance valve 4 has two sets of guide holes 43. A valve disc 44 is slidably mounted inside the balance valve 4. A pushing part 441 is provided at the position where the valve disc 44 fits against the inner wall of the balance valve 4, and the pushing part 441 is located at the end of the guide hole 43. A limiting part 431 is provided on the inner wall of the balance valve 4 on one side of the guide hole 43 to block the oil. When the balance valve 4 balances the oil injected into the hydraulic cylinder 3, oil is continuously injected into the balance valve 4 through the guide hole 43, so that the oil injected into the guide hole 43 pushes the pushing part 441, causing the valve disc 44 to move to one end. A positioning rod 41 is fixedly mounted inside the balance valve 4 on one side of the valve disc 44, and a connecting spring 42 is fixedly mounted around the outside of the positioning rod 41. Positioning is achieved by setting the positioning rod 41, and the connecting spring 42 assists in resetting during the positioning process in conjunction with the positioning rod 41. One end of the balance valve 4 has a connection port 46, and two sets of mounting ports 47 are opened on the outside of the balance valve 4. An oil guide port 442 is opened on the valve disc 44 located at the mounting port 47. One end of the connection port 46 is slidably mounted on the valve disc 44. A flow guide spring 453 is installed around the outside of one end of the valve disc 45, and a limit block 443 is provided on the valve disc 44 on one side of the flow guide spring 453 to limit its movement. When oil is continuously injected into the balance valve 4 through the guide hole 43, the oil injected into the guide hole 43 pushes the push part 441, causing the valve disc 44 to move to one end. When the valve stem 45 contacts the end of the positioning rod 41, the valve disc 44 compresses the connecting spring 42, causing the end of the valve disc 44 to open with the other end of the valve stem 45, allowing flow between the connection port 46 and the mounting port 47. The flow rate between the connection port 46 and the mounting port 47 affects the oil pressure injected into the hydraulic cylinder 3, and thus affects the pushing force of the hydraulic cylinder 3. The flow rate between the connection port 46 and the mounting port 47 can be controlled by controlling the oil pressure in the guide hole 43. This balances the oil pressure during the entire oil injection process of the hydraulic cylinder 3 and controls the pushing force of the hydraulic cylinder 3, ensuring the stability of the hydraulic cylinder 3 during the pushing process under controllable conditions.

[0031] One end of the valve disc 44 is provided with a blocking part 444, and one end of the valve stem 45 is equipped with a blocking block 451. The blocking block 451 and the blocking part 444 are fitted together by an oil guide slope 452. An oil guide channel 461 is provided inside the balance valve 4 at one end of the connection port 46. The fitting of the blocking part 444 and the oil guide slope 452 ensures the closing effect of the connection port 46. A pressure relief hole 445 is provided on the valve disc 44 on one side of the oil guide port 442. The setting of the pressure relief hole 445 facilitates the flow of oil during the flow process between the connection port 46 and the installation port 47, thereby reasonably distributing the flow rate of oil through the balance valve 4.

[0032] Example 1: During the operation of the work vehicle, the hydraulic cylinder 3 retracts and extends the drive roller 1. This ensures that when the work vehicle is fully loaded, the drive roller 1 is lowered to utilize the axle's load-bearing function and reduce the single-axle pressure of the entire vehicle on the ground; when unloaded, the drive roller 1 is retracted, no longer serving a load-bearing function, thus reducing the vehicle's driving resistance and tire wear. When the hydraulic cylinder 3 pushes the connecting frame 31, the connecting frame 31 and the tilting frame 22 cooperate with each other, and the shock absorber 32 ensures the stability of the drive roller 1 during the retraction and extension process.

[0033] Example 2: When the balance valve 4 balances the oil injected into the hydraulic cylinder 3, oil is continuously injected into the balance valve 4 through the guide hole 43. The oil injected into the guide hole 43 pushes the push part 441, causing the valve disc 44 to move to one end. The end of the valve stem 45 contacts the end of the positioning rod 41, and the valve disc 44 squeezes the connecting spring 42, causing the end of the valve disc 44 to open with the other end of the valve stem 45. This allows flow between the connection port 46 and the installation port 47. The flow rate between the connection port 46 and the installation port 47 affects the oil pressure injected into the hydraulic cylinder 3, and thus affects the pushing force of the hydraulic cylinder 3. The flow rate between the connection port 46 and the installation port 47 can be controlled by controlling the oil pressure in the guide hole 43.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An axle float control valve pack, characterized by, Including two groups of drive roller (1), the floating bridge (2) is installed between the drive roller (1), two groups of swing frame (23) are installed at the bottom of the floating bridge (2), and the turnover frame (22) is installed by the swing frame (23) and the drive roller (1) connection, the swing frame (23) top turnover is installed with hydraulic cylinder (3), and the hydraulic cylinder (3) end is connected with the turnover frame (22) between the connecting frame (31) and is connected and installed, the hydraulic cylinder (3) is fixedly installed with balance valve (4), two groups of flow guide hole (43) are formed in the balance valve (4).

2. A vehicle axle float control valve group as in claim 1, wherein: The wheel body (11) is installed on the drive roller (1), the floating bridge (2) and the drive roller (1) are connected and installed between the connecting rod (21), and the hydraulic cylinder (3) is installed with the damper (32) outside a circle between the connecting frame (31).

3. A vehicle axle float control valve group as in claim 1, wherein: The balance valve (4) is slidably installed with the valve (44), the valve (44) is provided with a pushing portion (441) at the position where the outer wall of the balance valve (4) is attached, and the pushing portion (441) is located at the end of the flow guide hole (43), and the limiting portion (431) for blocking the oil body is arranged on the inner wall of the balance valve (4) on one side of the flow guide hole (43).

4. A vehicle axle float control valve group as in claim 3, wherein: The positioning rod (41) is fixedly installed on one side of the valve (44) in the balance valve (4), and the connecting spring (42) is fixedly installed on the outer wall of the positioning rod (41).

5. A vehicle axle float control valve group as in claim 3, wherein: The balance valve (4) is provided with a connecting port (46) at one end, and two groups of installation ports (47) are formed on the outer wall of the balance valve (4), and the oil guide port (442) is formed on the valve (44) at the position of the installation port (47). The valve rod (45) is slidably installed in the valve (44) at one end of the connecting port (46), the flow guide spring (453) is installed on the outer wall of one end of the valve rod (45), and the limiting block (443) is arranged on the valve (44) on one side of the flow guide spring (453).

6. A vehicle axle float control valve group as in claim 5, wherein: The valve (44) is provided with a blocking portion (444) at one end, and the blocking block (451) is installed on one end of the valve rod (45), the blocking block (451) and the blocking portion (444) are attached by the oil guide slope (452), and the oil guide channel (461) is arranged in the balance valve (4) at one end of the connecting port (46).

7. A vehicle axle float control valve group as in claim 5, wherein: The pressure relief hole (445) is formed on the valve (44) on one side of the oil guide port (442).

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