A forklift steering axle steering buffer device

Abstract

This utility model relates to the field of steering axle technology and provides a steering buffer device for a forklift steering axle. It includes a steering axle body and a wheel hub, as well as a steering drive component, a shut-off valve, and a limiting plate. The steering drive component is installed on the outer wall of the steering axle body, and the shut-off valve is installed on the inner wall. Rotary sleeves are rotatably fitted at both ends, and these sleeves are connected to the side walls of the wheel hub. A limiting plate is installed on the side of the sleeve closest to the shut-off valve. The steering drive component drives the sleeves to rotate, causing the limiting plate to contact or move away from the shut-off valve to cut off or open the oil circuit. This buffer device can effectively buffer when the forklift is turned to its limit position, reducing wear on parts and improving operational safety and comfort.

Description

Technical Field

[0001] This utility model relates to the field of steering axle technology, and in particular to a steering buffer device for a forklift steering axle. Background Technology

[0002] Forklifts, widely used in warehousing, logistics, and industrial fields, directly impact operational safety and efficiency through their steering performance. The steering axle is a key component of the forklift's steering system, responsible for controlling the wheel steering.

[0003] Currently, common forklift steering axles often lack effective buffering devices during steering, especially when steering to the limit position, making them prone to rigid impacts. For example, when using axle limit plates for limiting, when the tire turns to the set deflection angle, the wheel hub collides with the axle limit plate, the wheel rim stops rotating, and the impact between the wheel hub and the limit plate causes a large impact on the entire vehicle and generates noise. This rigid impact not only leads to accelerated wear of forklift parts and shortens their service life, but also affects the driver's operating comfort, and may even cause safety accidents due to excessive impact.

[0004] Therefore, in order to address the above problems, a forklift steering axle steering buffer device is proposed to solve these problems. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by developing a steering buffer device for forklift steering axles. This invention can effectively buffer when the forklift is turned to its limit position, reduce wear on parts, and improve operational safety and comfort.

[0006] The technical solution to the technical problem solved by this utility model is as follows: This utility model provides a steering buffer device for a forklift steering axle, including a steering axle body and a wheel hub, and also includes a steering drive component, a shut-off valve and a limiting plate. The steering drive component is provided on the outer side wall of the steering axle body, and the shut-off valve is provided on the inner side wall. Rotary sleeves are rotatably sleeved at both ends, and the rotating sleeves are connected to the side wall of the wheel hub. A limiting plate is provided on the side of the rotating sleeve close to the shut-off valve. The steering drive component drives the rotating sleeve to rotate, causing the limiting plate to contact or move away from the shut-off valve to cut off or open the oil circuit.

[0007] As an optimization, the shut-off valve includes a valve core, a valve body, and a return spring. The valve body is located on the inner wall of the steering axle body, and the valve core is connected to the valve body through the return spring. The end of the valve core away from the return spring protrudes from the valve body.

[0008] As an optimization, the valve body has a first oil guide passage along the radial direction of the valve core, and the valve core has a second oil guide passage along the direction parallel to the oil guide passage.

[0009] As an optimization, the first oil guide passage is set vertically, and an abutment plate is set at one end of the valve core located outside the valve body.

[0010] As an optimization, the steering drive component includes a steering cylinder, a first link, and a second link. The steering cylinder is located in the middle of the outer side wall of the steering axle body. The output end of the steering cylinder is hinged to the first link. The end of the first link away from the steering cylinder is hinged to the second link. The end of the second link away from the first link is connected to the rotating sleeve.

[0011] As an optimization, it also includes a steering gear and an oil pipe. The input end of the steering gear is connected to the oil supply device, and the output end is connected to the oil inlet end of the first oil guide passage of the valve body through an oil pipe. The oil outlet end of the first oil guide passage is connected to the rodless end of the steering cylinder through an oil pipe.

[0012] As an optimization, mounting shafts are provided at both ends of the steering axle body, and the swivel sleeve is rotatably mounted on the mounting shafts.

[0013] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages or beneficial effects: 1. When the forklift turns to its limit position, the oil circuit is cut off by the cooperation of the limit plate and the shut-off valve, so that the steering cylinder stops moving. This effectively avoids rigid impact, plays a good buffering role, reduces the wear of parts, improves the stability and safety of the forklift when turning, and ensures the operator's operating comfort. 2. The device consists of simple components such as steering drive components, shut-off valves, and limit plates. It has a compact structure, is easy to manufacture and install, and reduces production costs. 3. The connection between the components is simple, and they are easy to disassemble and replace during maintenance, which reduces maintenance costs and difficulty. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] Figure 1 The overall structure of this utility model Figure 1 ; Figure 2 The overall structure of this utility model Figure 2 ; Figure 3 This utility model Figure 1 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the shut-off valve of this utility model.

[0016] In the diagram, 1. Steering axle body; 101. Mounting shaft; 2. Shut-off valve; 201. Valve core; 2011. Second oil guide passage; 2012. Abutment plate; 202. Valve body; 2021. First oil guide passage; 203. Return spring; 3. Wheel hub; 4. Sleeve; 5. Limiting plate; 6. Steering cylinder; 7. First connecting rod; 8. Second connecting rod; 9. Detailed Implementation To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] like Figures 1 to 4 As shown, a steering buffer device for a forklift steering axle includes a steering axle body 1 and a wheel hub 3, as well as a steering drive component, a shut-off valve 2 and a limiting plate 5. The steering drive component is provided on the outer side wall of the steering axle body 1, and the shut-off valve 2 is provided on the inner side wall. Rotary sleeves 4 are rotatably sleeved at both ends. The rotating sleeves 4 are connected to the side walls of the wheel hub 3. The limiting plate 5 is provided on the side of the rotating sleeve 4 near the shut-off valve 2. The steering drive component drives the rotating sleeve 4 to rotate, causing the limiting plate 5 to contact or move away from the shut-off valve 2 to cut off or open the oil circuit.

[0018] The shut-off valve 2 includes a valve core 201, a valve body 202, and a return spring 203. The valve body 202 is disposed on the inner wall of the steering axle body 1. The valve core 201 is connected to the valve body 202 through the return spring 203. The end of the valve core 201 away from the return spring 203 extends out of the valve body 202. The valve body 202 can be fixed to the inner wall of the steering axle body 1 by bolts.

[0019] The valve body 202 has a first oil guide passage 2021 in the radial direction of the valve core 201, and the valve core 201 has a second oil guide passage 2011 in the direction parallel to the oil guide passage 2021.

[0020] The first oil guide passage 2021 is vertically arranged, and the valve core 201 is provided with an abutment plate 2012 at one end outside the valve body 202.

[0021] The steering drive component includes a steering cylinder 6, a first connecting rod 7, and a second connecting rod 8. The steering cylinder 6 is located in the middle of the outer side wall of the steering axle body 1. The output end of the steering cylinder 6 is hinged to the first connecting rod 7. The end of the first connecting rod 7 away from the steering cylinder 6 is hinged to the second connecting rod 8. The end of the second connecting rod 8 away from the first connecting rod 7 is connected to the rotating sleeve 4.

[0022] It also includes a steering gear 9 and an oil pipe 10. The input end of the steering gear 9 is connected to the oil supply device, and the output end is connected to the oil inlet end of the first oil guide passage 2021 of the valve body 202 via the oil pipe 10. The oil outlet end of the first oil guide passage 2021 is connected to the rodless end of the steering cylinder 6 via the oil pipe 10. The oil supply device includes structures such as an oil tank, a pump, and an overflow valve, which are existing technologies and are not shown in the figure, so they will not be described in detail here. The connection between the oil pipe 10 and the valve body 202 and the steering cylinder 6 can be made through a compression fitting.

[0023] The steering axle body 1 has mounting shafts 101 at both ends, and the rotating sleeve 4 is rotatably mounted on the mounting shafts 101. The rotating sleeve 4 can be made of ductile iron and is rotatably mounted on the mounting shafts 101 via ball bearings.

[0024] Working process: When the forklift needs to turn, the oil supply device supplies oil to the steering gear 9. The steering gear 9 controls the oil to be delivered to the first oil guide passage 2021 of the valve body 202 of the shut-off valve 2 through the oil pipe 10. At this time, if the limit plate 5 is not in contact with the valve core 201 of the shut-off valve 2, the valve core 201 is in the initial position under the action of the return spring 203. The second oil guide passage 2011 on the valve core 201 is connected to the first oil guide passage 2021 of the valve body 202. The oil flows sequentially through the input end of the first oil guide passage 2021, the second oil guide passage 2011, the output end of the first oil guide passage 2021, and the oil pipe 10 into the rodless end of the steering cylinder 6. The output end of the steering cylinder 6 extends or retracts, driving the first connecting rod 7 to move. The first connecting rod 7 drives the second connecting rod 8, which in turn drives the rotating sleeve 4 to rotate around the mounting shafts 101 at both ends of the steering axle body 1. The rotating sleeve 4 drives the wheel hub 3 to achieve the steering action. When the forklift turns to its limit position, the limiting plate 5 on the rotating sleeve 4 contacts the abutment plate 2012 on the valve core 201 of the shut-off valve 2, pushing the valve core 201 into the valve body 202 and compressing the return spring 203. At this time, the second oil guide passage 2011 on the valve core 201 is misaligned with the first oil guide passage 2021 of the valve body 202, the oil circuit is cut off, the steering cylinder 6 stops moving, avoiding rigid impact caused by oversteering and achieving steering buffering.

[0025] When the forklift reverses direction and the limit plate 5 moves away from the abutment plate 2012, the valve core 201 is reset under the action of the return spring 203, and the second oil guide passage 2011 is connected to the first oil guide passage 2021 again. The oil circuit is opened, and the steering cylinder 6 can continue to drive the steering action.

[0026] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A forklift truck steering axle steering damper device comprising a steering axle body (1) and a wheel hub (3), characterized in that: Also includes Steering drive component, shut-off valve (2) and limiting plate (5) are provided. Steering drive component is provided on the outer side wall of steering axle body (1), shut-off valve (2) is provided on the inner side wall, and rotating sleeve (4) is provided at both ends. Rotating sleeve (4) is connected to the side wall of wheel hub (3). Limiting plate (5) is provided on the side of rotating sleeve (4) close to shut-off valve (2). Steering drive component drives rotating sleeve (4) to rotate and cause limiting plate (5) to contact or move away from shut-off valve (2) to cut off or open oil circuit.

2. The forklift truck steer axle steering damper of claim 1 wherein: The shut-off valve (2) includes a valve core (201), a valve body (202) and a return spring (203). The valve body (202) is located on the inner wall of the steering axle body (1). The valve core (201) is connected to the valve body (202) through the return spring (203). The end of the valve core (201) away from the return spring (203) extends out of the valve body (202).

3. The forklift steering axle steering buffer device according to claim 2, characterized in that: The valve body (202) has a first oil guide passage (2021) in the radial direction of the valve core (201), and the valve core (201) has a second oil guide passage (2011) in the direction parallel to the first oil guide passage (2021).

4. The forklift steering axle steering buffer device according to claim 3, characterized in that: The first oil guide passage (2021) is set vertically, and the valve core (201) is provided with an abutment plate (2012) at one end outside the valve body (202).

5. The forklift steering axle steering buffer device according to claim 3, characterized in that: The steering drive unit includes a steering cylinder (6), a first connecting rod (7), and a second connecting rod (8). The steering cylinder (6) is located in the middle of the outer side wall of the steering axle body (1). The output end of the steering cylinder (6) is hinged to the first connecting rod (7). The end of the first connecting rod (7) away from the steering cylinder (6) is hinged to the second connecting rod (8). The end of the second connecting rod (8) away from the first connecting rod (7) is connected to the rotating sleeve (4).

6. The forklift steering axle steering buffer device according to claim 5, characterized in that: It also includes a steering gear (9) and an oil pipe (10). The input end of the steering gear (9) is connected to the oil supply device, and the output end is connected to the oil inlet of the first oil guide passage (2021) of the valve body (202) through the oil pipe (10). The oil outlet of the first oil guide passage (2021) is connected to the rodless end of the steering cylinder (6) through the oil pipe (10).

7. The forklift steering axle steering buffer device according to claim 1 or 2, characterized in that: The steering axle body (1) has mounting shafts (101) at both ends, and the rotating sleeve (4) is rotatably mounted on the mounting shafts (101).

Images