Steering gear with wear-resistant valve element and valve sleeve

Abstract

The steering gear comprises a valve sleeve body, a valve element body and a reinforcing layer, the valve element body is arranged on the inner wall of the valve sleeve body in a sleeved mode, a valve element oil return hole is formed in the valve element body, and a noise reduction groove is formed in the outer wall of the valve element body. A pin shifting hole for fixing is formed in the top end of the valve sleeve body, an oil inlet hole is formed in the bottom end of the valve sleeve body, reinforcing layers are arranged on the inner wall of the valve sleeve body and the inner wall of the valve element body, reinforcing rib bodies are arranged in the reinforcing layers, and the device is made of a carburizing steel material and achieves the surface hardness of 58-62 through carburizing and quenching. The valve sleeve body is subjected to heat treatment normalizing and heat treatment carbonitriding, the surface hardness HRC is 60-65, and the surface carbonitriding can ensure that carbon and nitrogen are simultaneously permeated into the surface of a steel part from the surface of a part.

Description

Technical Field

[0001] The utility model relates to the technical field of steering gears, in particular to a steering gear with a wear-resistant valve core and a valve sleeve. Background Art

[0002] Fully hydraulic steering gear is widely used in vehicle steering and ship hydraulic steering gear rudder. It allows drivers to achieve greater steering force control with less operating force, and it is safe, reliable, flexible and light in operation. The steering gear is fully hydraulic, that is, there is no mechanical connection between the steering column and the steering wheel, and there is a hydraulic pipe or hose connection between the steering gear and the steering cylinder. When the steering wheel is turned, the steering gear delivers a relative amount of oil according to the steering wheel rotation ratio. The oil flows directly to the corresponding side of the operating cylinder, and the oil on the other side returns to the tank.

[0003] However, the existing steering gear with wear-resistant valve core and valve sleeve has the following problems during use: the traditional valve core and valve sleeve are installed in combination, which is prone to friction and force pressure, so the strength requirements are high, and long-term use can easily lead to damage, requiring operators to frequently perform maintenance and protection. Utility Model Content

[0004] The utility model aims to provide a steering gear with a wear-resistant valve core and a valve sleeve to solve the related problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steering gear with a wear-resistant valve core and a valve sleeve, comprising a valve sleeve body, a valve core body and a reinforcement layer, the inner wall of the valve sleeve body is sleeved with a valve core body, and a valve core oil return hole is opened inside the valve core body, a noise reduction groove is provided on the outer wall of the valve core body, a pin hole for fixing is opened at the top of the valve sleeve body, an oil inlet hole is opened at the bottom end of the valve sleeve body, the inner walls of the valve sleeve body and the valve core body are both provided with reinforcement layers, and a reinforcing rib body is provided inside the reinforcement layer.

[0006] The technical solution provides a steering gear with a wear-resistant valve core and a valve sleeve, wherein the valve sleeve body is made of 45# steel.

[0007] The technical solution provides a steering gear with a wear-resistant valve core and a valve sleeve, wherein the surface hardness of the valve sleeve body is HRC60-65.

[0008] The technical solution provides a steering gear with a wear-resistant valve core and a valve sleeve, wherein the valve core body is made of carburized steel.

[0009] The technical solution provides a steering gear with a wear-resistant valve core and a valve sleeve, wherein the surface hardness of the valve core body is 58-62.

[0010] The technical solution provides a steering gear with a wear-resistant valve core and a valve sleeve, wherein the shape of the reinforcing rib body is H-shaped.

[0011] Compared with the prior art, the utility model provides a steering gear with a wear-resistant valve core and a valve sleeve, which has the following beneficial effects:

[0012] 1. The utility model adopts carburized steel material for the valve core body, and after carburizing and quenching, the surface hardness reaches 58-62. Carburizing and quenching make the surface of the carburized workpiece obtain very high hardness and improve its wear resistance. The main processes are: low temperature tempering, pre-cooling direct quenching, primary heating quenching, carburizing high temperature tempering, secondary quenching cold treatment, and induction heating process after carburizing. To ensure the surface hardness and wear resistance of the parts, the valve sleeve body is heat treated and normalized, heat treated with carbonitriding, and the surface hardness is HRC60-65. The surface carbonitriding can ensure that the surface of the parts is infiltrated with carbon and nitrogen at the same time. The surface is mainly carburized, and a small amount of nitrogen is infiltrated. Compared with carburizing, carbonitriding has the advantages of faster infiltration speed, higher hardenability and tempering resistance of the infiltration layer, good wear resistance and fatigue resistance. The surface roughness of the inner hole of the valve sleeve body reaches Ra0.2 through machining. High hardness, good roughness, and good corner model of carbonitriding make the friction of parts small during movement, and the steering gear is lighter and more comfortable to use.

[0013] 2. The utility model provides H-shaped reinforcing ribs on the inner wall of the valve sleeve body and the valve core body to increase the strength, which can be used to improve the wear resistance and abrasion resistance, provide rubber protection for the parts that need wear resistance, extend their service life, and reduce inspections caused by maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the valve sleeve body and the valve core body of the utility model;

[0016] Figure 3 It is a left side cross-sectional structural schematic diagram of the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.

[0018] In the figure: 1. Valve sleeve body; 2. Valve core body; 3. Pin hole; 4. Valve core oil return hole; 5. Noise reduction groove; 6. Oil inlet hole; 7. Reinforcement layer; 8. Reinforcement rib body. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1, as Figure 1-2 As shown, the utility model provides a technical solution: a steering gear with a wear-resistant valve core and a valve sleeve, comprising a valve sleeve body 1, a valve core body 2 and a reinforcement layer 7, the inner wall of the valve sleeve body 1 is provided with a valve core body 2, and the valve core body 2 is provided with a valve core oil return hole 4, the outer wall of the valve core body 2 is provided with a noise reduction groove 5, the top of the valve sleeve body 1 is provided with a pin hole 3 for fixing, and the bottom of the valve sleeve body 1 is provided with an oil inlet hole 6, the valve sleeve body 1 is made of carburized steel material, the surface hardness of the valve sleeve body 1 is 58-62, the valve core body 2 is made of 45# steel, and the surface hardness of the valve core body 2 is HRC60-65, and the valve core body 2 is made of carburized steel material, and after carburizing and quenching, the surface hardness reaches 58-62. Carburizing and quenching make the surface of the carburized workpiece obtain very high hardness and improve its wear resistance. The main processes are: low temperature tempering, pre-cooling direct quenching, primary heating quenching, carburizing high temperature tempering, secondary quenching cold treatment, and induction heating process after carburizing. To ensure the surface hardness and wear resistance of the parts, the valve sleeve body 1 is heat treated with normalizing, heat treated with carbonitriding, and the surface hardness is HRC60-65. The surface carbonitriding can ensure that the surface of the parts is simultaneously infiltrated with carbon and nitrogen. The chemical surface heat treatment process. Carburizing is the main method, and a small amount of nitrogen is infiltrated. Compared with carburizing, carbonitriding has the advantages of faster infiltration speed, higher hardenability and tempering resistance of the infiltration layer, good wear resistance and fatigue resistance. The inner hole of the valve sleeve body 1 is machined to a surface roughness of Ra0.2. High hardness, good roughness, and carbonitriding have a good angle model, which makes the friction of the parts small during movement, and the steering gear is lighter and more comfortable to use.

[0021] Embodiment 2, as Figure 1-4 As shown, the utility model provides a technical solution: a steering gear with a wear-resistant valve core and a valve sleeve, comprising a valve sleeve body 1 and a valve core body 2, both inner walls of which are provided with a reinforcement layer 7, and a reinforcement rib body 8 is provided inside the reinforcement layer 7, and the reinforcement rib body 8 is in an H-shape. By providing H-shaped reinforcement ribs on the inner walls of the valve sleeve body 1 and the valve core body 2, the strength, wear resistance and abrasion resistance are increased.

[0022] Working principle: First, the valve core body 2 is made of carburized steel material, which is carburized and quenched to reach a surface hardness of 58-62. Carburizing and quenching make the surface of the carburized workpiece obtain a very high hardness and improve its wear resistance. The main processes are: low temperature tempering, pre-cooling direct quenching, primary heating quenching, carburizing high temperature tempering, secondary quenching cold treatment, and induction heating after carburizing. To ensure the surface hardness and wear resistance of the parts, the valve sleeve body 1 is heat treated and normalized, heat treated with carbonitriding, and the surface hardness is HRC60-65. The surface carbonitriding can ensure that the surface of the parts is simultaneously infiltrated with carbon and nitrogen. The chemical surface heat treatment process. Carburizing is the main method, and a small amount of nitrogen is infiltrated. Compared with carburizing, carbonitriding has the advantages of faster infiltration speed, higher hardenability and tempering resistance of the infiltrated layer, good wear resistance and fatigue resistance. The inner hole of the valve sleeve body 1 is processed to a surface roughness of Ra0.2. The high hardness, good roughness and good carbonitriding angle model reduce the friction of the parts during movement and make the steering gear lighter and more comfortable to use. H-shaped reinforcement ribs are provided on the inner walls of the valve sleeve body 1 and the valve core body 2 to increase the strength. The wear resistance and abrasion resistance can be improved, and the rubber protection for the parts requiring wear resistance can extend their service life and reduce the inspection caused by maintenance.

[0023] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A steering gear with a wear-resistant valve core and a valve sleeve, comprising a valve sleeve body (1), a valve core body (2) and a reinforcement layer (7), characterized in that: The inner wall of the valve sleeve body (1) is sleeved with a valve core body (2), and a valve core oil return hole (4) is provided inside the valve core body (2), a noise reduction groove (5) is provided on the outer wall of the valve core body (2), a pin hole (3) for fixing is provided at the top end of the valve sleeve body (1), and an oil inlet hole (6) is provided at the bottom end of the valve sleeve body (1), and the inner walls of the valve sleeve body (1) and the valve core body (2) are both provided with a reinforcement layer (7), and a reinforcement rib body (8) is provided inside the reinforcement layer (7).

2. A steering gear with a wear-resistant valve core and a valve sleeve according to claim 1, characterized in that: The valve sleeve body (1) is made of 45# steel.

3. A steering gear with a wear-resistant valve core and a valve sleeve according to claim 1, characterized in that: The surface hardness of the valve sleeve body (1) is HRC60-65.

4. A steering gear with a wear-resistant valve core and a valve sleeve according to claim 1, characterized in that: The valve core body (2) is made of carburized steel.

5. The steering gear with a wear-resistant valve core and a valve sleeve according to claim 1, characterized in that: The surface hardness of the valve core body (2) is 58-62.

6. The steering gear with a wear-resistant valve core and a valve sleeve according to claim 1, characterized in that: The reinforcing rib body (8) is in an H-shaped shape.

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