A low noise full hydraulic steering gear

Abstract

The utility model discloses a low -noise's full hydraulic steering gear relates to the technical field of steering gear, including valve core, oil distribution groove and first oil groove, the bottom of valve core is provided with a plurality of oil distribution grooves, the outer wall of valve core is provided with anticorrosive layer, and the outer wall of anticorrosive layer is sprayed with wear -resisting layer, the both sides of valve core outer wall are provided with second oil groove, the front and back both ends of valve core are provided with third oil groove, this device has the valve core rotation and the corner that produces with valve bushing when steering gear steering opens, and when the corner opens, two groups of third oil groove position open first, with the corner increase, in turn is second oil groove position open, last is oil distribution groove position open, because the pressure and flow of oil circuit exist gradually open in the opening process, and then reduce the impact that generates, play the effect of low noise.

Description

Technical Field

[0001] This utility model relates to the field of steering gear technology, specifically a low-noise, fully hydraulic steering gear. Background Technology

[0002] The steering system is fully hydraulic, meaning there is no mechanical connection between the steering column and the steering wheels. Instead, the steering gear is connected to the steering cylinder via hydraulic lines or hoses. When the steering wheel is turned, the steering gear delivers a corresponding amount of hydraulic fluid according to the steering wheel's rotation. This fluid flows directly to the corresponding side of the steering cylinder, while the fluid on the other side returns to the reservoir.

[0003] However, existing low-noise fully hydraulic steering systems have the following problems during use: Traditional valve cores have a total of 12 oil passages at the tail. When the steering system stops, the oil circuit P port directly returns to the oil tank through the 12 grooves at the tail port T. When the steering system turns, the 12 grooves close sequentially as the turning angle increases. During the closing process, the instantaneous closure due to pressure and flow in the oil circuit can easily generate shock and noise. In addition, the steering system has poor corrosion resistance and wear resistance. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise, fully hydraulic steering system to solve the related problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-noise fully hydraulic steering gear, comprising a valve core, an oil distribution groove and a first oil passage groove, wherein multiple oil distribution grooves are provided at the bottom end of the valve core, an anti-corrosion layer is provided on the outer wall of the valve core, and a wear-resistant layer is sprayed on the outer wall of the anti-corrosion layer, a second oil passage groove is provided on both sides of the outer wall of the valve core, and a third oil passage groove is provided at both the front and rear ends of the valve core.

[0006] This technical solution provides a low-noise fully hydraulic steering gear, wherein the width of the oil distribution groove is 1.2mm.

[0007] This technical solution provides a low-noise fully hydraulic steering gear, wherein the width of the second oil passage is 1.2mm, and the width of the top port of the second oil passage is increased to 3.3mm.

[0008] This technical solution provides a low-noise fully hydraulic steering gear, wherein the width of the third oil passage is 1.2mm, and the width of the top port of the third oil passage is increased to 4mm.

[0009] This technical solution provides a low-noise fully hydraulic steering system, wherein the anti-corrosion layer is made of phenolic fiberglass material.

[0010] This technical solution provides a low-noise fully hydraulic steering gear, wherein the wear-resistant layer is made of chlorinated rubber material.

[0011] Compared with the prior art, this utility model provides a low-noise fully hydraulic steering gear, which has the following beneficial effects:

[0012] 1. This utility model utilizes the valve core rotation and valve sleeve to generate an angle when the steering gear is turned on. When the angle is turned on, the two sets of third-pass oil grooves open first. As the angle increases, the second-pass oil grooves open in sequence, and finally the distribution oil grooves open. During the opening process, the oil circuit gradually opens due to pressure and flow, thereby reducing the impact and achieving a low-noise effect.

[0013] 2. This utility model increases strength and corrosion resistance by adding phenolic fiberglass and chlorinated rubber to the outer wall of the valve core. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the left-side cross-sectional structure of this utility model.

[0017] In the diagram: 1. Valve core; 2. Oil distribution groove; 3. First oil passage groove; 4. Anti-corrosion layer; 5. Wear-resistant layer; 6. Second oil passage groove; 7. Third oil passage groove. Detailed Implementation

[0018] 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.

[0019] Example 1, as Figure 1-2 As shown, this utility model provides a technical solution: a low-noise fully hydraulic steering gear, including a valve core 1, an oil distribution groove 2 and a first oil passage groove 3. The bottom end of the valve core 1 has multiple oil distribution grooves 2. The outer wall of the valve core 1 is provided with an anti-corrosion layer 4, and the outer wall of the anti-corrosion layer 4 is sprayed with a wear-resistant layer 5. The anti-corrosion layer 4 is made of phenolic fiberglass material, and the wear-resistant layer 5 is made of chlorinated rubber material. By adding phenolic fiberglass and chlorinated rubber to the outer wall of the valve core 1, the strength and corrosion resistance are increased.

[0020] Example 2, as Figure 1-3As shown, this utility model provides a technical solution: a low-noise fully hydraulic steering gear, including a second oil passage groove 6 on both sides of the outer wall of the valve core 1, and a third oil passage groove 7 at both ends of the valve core 1. The width of the distribution groove 2 is 1.2mm, the width of the second oil passage groove 6 is 1.2mm, and the width of the top end of the second oil passage groove 6 is increased to 3.3mm. The width of the third oil passage groove 7 is 1.2mm, and the width of the top end of the third oil passage groove 7 is increased to 4mm. By adding 12 oil passage grooves at the tail of the valve core 1, when the steering gear stops, the oil passage is directly connected to the return oil tank through the 12 grooves at the tail. When the steering gear turns, the valve core 1 rotates and generates an angle with the valve sleeve. When the angle opens, the two sets of third oil passage grooves 7 open first. As the angle increases, the second oil passage grooves 6 open in sequence, and finally the distribution groove 2 opens. During the opening process, the oil passage gradually opens due to the pressure and flow, thereby reducing the impact and achieving a low-noise effect.

[0021] Working principle: First, 12 oil passage grooves are added to the tail of valve core 1. When the steering gear stops, the oil port is directly connected to the oil tank through the 12 grooves at the tail. When the steering gear turns, valve core 1 rotates and generates an angle with the valve sleeve. When the angle opens, the 7th position of the two sets of third oil passage grooves opens first. As the angle increases, the 6th position of the second oil passage groove opens in sequence, and finally the 2nd position of the distribution groove opens. During the opening process, the oil passage gradually opens due to the pressure and flow, thereby reducing the impact and achieving a low noise effect. The valve core 1 position is reinforced with phenolic fiberglass and chlorinated rubber on the outer wall of valve core 1 to increase strength and corrosion resistance.

[0022] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A low-noise fully hydraulic steering gear, comprising a valve core (1), an oil distribution groove (2), and a first oil passage groove (3), characterized in that: The valve core (1) has multiple oil distribution grooves (2) at its bottom end. The outer wall of the valve core (1) is provided with an anti-corrosion layer (4), and the outer wall of the anti-corrosion layer (4) is sprayed with a wear-resistant layer (5). The two sides of the outer wall of the valve core (1) are provided with second oil passage grooves (6), and the front and rear ends of the valve core (1) are provided with third oil passage grooves (7).

2. The low-noise fully hydraulic steering system according to claim 1, characterized in that: The width of the oil distribution groove (2) is 1.2 mm.

3. The low-noise fully hydraulic steering system according to claim 1, characterized in that: The width of the second oil passage (6) is 1.2 mm, and the width of the top port of the second oil passage (6) is increased to 3.3 mm.

4. A low-noise fully hydraulic steering system according to claim 1, characterized in that: The width of the third oil channel (7) is 1.2 mm, and the width of the top port of the third oil channel (7) is increased to 4 mm.

5. A low-noise fully hydraulic steering system according to claim 1, characterized in that: The anti-corrosion layer (4) is made of phenolic fiberglass material.

6. A low-noise fully hydraulic steering system according to claim 1, characterized in that: The wear-resistant layer (5) is made of chlorinated rubber material.

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