Pre-selection valve

Abstract

A valve element assembly comprises a first steel ball, a second steel ball, a valve element assembly, a valve sleeve assembly and a guide sleeve assembly, a groove is formed in the upper end of the valve element assembly, a second groove is formed in the bottom of the groove, the second steel ball is arranged in the second groove, the first steel ball is arranged in the groove, and the first steel ball is tangent to the second steel ball; the guide sleeve assembly is arranged at the lower end of the valve sleeve assembly. The ball valve has the advantages that rolling friction is achieved by adding the second steel ball, abrasion of the first steel ball and the valve element assembly is reduced, and the service life is prolonged; by improving the valve cavity, the first sealing ring groove and the second sealing ring groove, the sealing ring is reliably positioned; meanwhile, the valve sleeve assembly and the valve element assembly are integrally formed, so that the strength is improved, and the valve element assembly can be well guided to move up and down; and finally, the endurance life is further prolonged and the air leakage risk is greatly reduced.

Description

Technical Field

[0001] This utility model patent relates to a preselection valve. Background Technology

[0002] Currently, the pre-selection valves on the market are installed in the cab and used to switch the two-position five-way valve of the transmission to perform gear shifting. The sensitivity of the pre-selection valve in switching between high and low gears and whether it leaks air often determines whether the transmission shifting function works reliably, affecting the driving experience of commercial vehicles and also affecting the safety of the driver.

[0003] The steel ball of the preselection valve on existing heavy trucks has high friction with the upper end of the valve core assembly, which easily causes wear and jamming, posing a danger to driving.

[0004] The first steel ball and valve core groove do not roll and become stuck, causing forced wear on the inner arc groove of the plastic lever; the split bushing is prone to leakage problems caused by missing parts or improper assembly, and the split installation has poor stability; the valve body has many steps in the inner hole, many processing steps, high dimensional control requirements, and many through holes for assembling the bushing sealing ring, which increases the assembly difficulty and is also easy to damage the O-ring; the valve body has a large allowance in inner wall thickness, which poses a risk of die-casting sand holes; there are no positioning steps at the installation points of the two outer circular sealing rings, which poses a risk of leakage due to misalignment during assembly. Utility Model Content

[0005] The purpose of this invention is to solve existing technical problems by proposing a preselection valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pre-selection valve, comprising a shell, a valve body, a setting button, a valve core assembly, and a quick-connect fitting assembly. The shell is disposed on the valve body to form an inner cavity. One end of the setting button is disposed in the inner cavity and connected to the shell via a button shaft. The valve body contains a valve core assembly. The upper end of the valve core assembly is connected to the setting button, and the lower end of the valve core assembly is connected to the quick-connect fitting assembly. The valve core assembly includes a first steel ball, a second steel ball, a valve core assembly, a valve sleeve assembly, and a guide sleeve assembly. A groove is formed at the upper end of the valve core assembly, and a second groove is formed at the bottom of the groove. The second steel ball is disposed in the second groove, and the first steel ball is disposed in the groove. The first steel ball and the second steel ball are tangent to each other. The valve sleeve assembly is disposed at the lower end of the valve core assembly, and the guide sleeve assembly is disposed at the lower end of the valve sleeve assembly.

[0007] Furthermore, the valve sleeve assembly and the valve core assembly are integrally molded.

[0008] Furthermore, the valve body is provided with a valve cavity, and the valve core assembly and quick-connect fitting assembly are sequentially arranged in the valve cavity.

[0009] Furthermore, the inner wall of the valve cavity is smooth and flat at the points corresponding to the guide sleeve assembly and the quick-connect fitting assembly.

[0010] Furthermore, a first sealing ring groove is provided on the outer side of the guide sleeve assembly, and the sealing ring is disposed in the first sealing ring groove.

[0011] Furthermore, a second sealing ring groove is provided on the outside of the quick-connect connector assembly, and the sealing ring is disposed in the second sealing ring groove.

[0012] Furthermore, the outer diameter of the sealing ring, the inner diameter of the first sealing ring groove, and the inner diameter of the second sealing ring groove are the same.

[0013] Furthermore, the quick-connect assembly is locked to the valve chamber by screws.

[0014] Furthermore, the outer sides of the two sealing rings make sealing contact with the inner wall of the valve cavity.

[0015] Furthermore, the other end of the gear shift button is located on the outside of the housing.

[0016] The beneficial effects of this utility model are: by adding a second steel ball to achieve rolling friction, the wear of the first steel ball and valve core assembly is reduced, and the service life is improved; by improving the valve cavity, the first sealing ring groove and the second sealing ring groove, the sealing ring is reliably positioned; at the same time, the integral molding of the valve sleeve assembly and the valve core assembly improves the strength and plays a good guiding role in the up and down movement of the valve core assembly; finally, the service life is further improved and the risk of air leakage is greatly reduced. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present patent.

[0018] Figure 2 This is a cross-sectional view of the valve core assembly. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example 1 combined with appendix Figure 1-2 A pre-selection valve includes a housing 1, a valve body 2, a setting button 3, a valve core assembly 4, and a quick-connect fitting assembly 5. The housing is disposed on the valve body to form an inner cavity 6. One end of the setting button is disposed in the inner cavity and connected to the housing via a button shaft. The valve core assembly 4 is disposed inside the valve body. The setting button 3 is connected to the upper end of the valve core assembly, and the quick-connect fitting assembly 5 is connected to the lower end of the valve core assembly. The valve core assembly includes a first steel ball 41, a second steel ball 42, a valve core assembly 43, a valve sleeve assembly 44, and a guide sleeve assembly 45. A groove 46 is formed at the upper end of the valve core assembly, and a second groove 47 is formed at the bottom of the groove. The second steel ball is disposed in the second groove, and the first steel ball is disposed in the groove. The first steel ball and the second steel ball are tangent to each other. The valve sleeve assembly is disposed at the lower end of the valve core assembly, and the guide sleeve assembly is disposed at the lower end of the valve sleeve assembly.

[0021] A preselection valve, wherein the valve sleeve assembly and the valve core assembly are integrally formed.

[0022] A preselection valve has a valve cavity 21 inside the valve body, and a valve core assembly and a quick-connect fitting assembly are sequentially arranged in the valve cavity.

[0023] A pre-selection valve, wherein the inner wall of the valve cavity is flat and smooth at the corresponding guide sleeve assembly and quick-connect fitting assembly.

[0024] A pre-selection valve has a first sealing ring groove 451 on the outer side of the guide sleeve assembly, and a sealing ring 8 is disposed in the first sealing ring groove.

[0025] A pre-selection valve has a second sealing ring groove 51 on the outside of the quick-connect fitting assembly, and a sealing ring 8 is disposed in the second sealing ring groove.

[0026] A pre-selection valve, wherein the outer diameter of the sealing ring, the inner diameter of the first sealing ring groove, and the inner diameter of the second sealing ring groove are the same.

[0027] A preselection valve, wherein a quick-connect fitting assembly is connected to the valve chamber by screw locking.

[0028] A pre-selection valve, wherein the outer sides of two sealing rings are in sealing contact with the inner wall of the valve cavity.

[0029] A pre-selection valve, with the other end of the adjustment button located on the outside of the housing.

[0030] A pre-selection valve, by incorporating a second steel ball, reduces friction between the first steel ball and the valve core assembly, minimizing jamming and effectively improving service life.

[0031] A pre-selection valve has a valve sleeve assembly and a valve core assembly integrally formed for good integrity. The first sealing ring at the valve sleeve assembly and the valve core assembly is well assembled and positioned, resulting in low risk of air leakage and increased strength.

[0032] A pre-selection valve has fewer steps and fewer machining steps in the valve body, making the dimensions easier to control. The valve sleeve assembly and valve core assembly have fewer through holes for the first sealing ring, making assembly easier and minimizing damage to the first sealing ring. The valve body has a moderate inner wall thickness allowance, reducing the risk of die-casting sand holes.

[0033] A pre-selected valve has a first sealing ring groove and a second sealing ring groove with upper and lower positioning steps at the sealing ring installation location, which will not cause the risk of air leakage due to misalignment during assembly.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A preselect valve comprising a housing, a valve body, a dial button, a valve core assembly and a quick connector assembly, the housing is arranged on the valve body to form an inner cavity, one end of the dial button is arranged in the inner cavity and connected with the housing through a button rotating shaft, the valve body is provided with the valve core assembly, the upper end of the valve core assembly is connected with the dial button, and the lower end of the valve core assembly is connected with the quick connector assembly, characterized in that: The valve core assembly comprises a first steel ball, a second steel ball, a valve core assembly, a valve sleeve assembly and a guide sleeve assembly, a groove is formed at the upper end of the valve core assembly, a second groove is formed at the bottom of the groove, the second steel ball is arranged in the second groove, the first steel ball is arranged in the groove, and the first steel ball and the second steel ball are tangent to each other; the valve sleeve assembly is arranged at the lower end of the valve core assembly, and the guide sleeve assembly is arranged at the lower end of the valve sleeve assembly.

2. A preselect valve according to claim 1, characterized in that: The valve sleeve assembly and the valve core assembly are integrally formed.

3. A preselect valve according to claim 1, characterized in that: The valve body is provided with a valve cavity, and the valve core assembly and the quick plug connector assembly are sequentially arranged in the valve cavity.

4. A preselect valve according to claim 3, characterised in that: The inner wall of the valve cavity is smooth and flat at the positions corresponding to the guide sleeve assembly and the quick plug connector assembly.

5. A preselect valve according to claim 4, characterised in that: The outer side of the guide sleeve assembly is provided with a first sealing ring groove, and a sealing ring is arranged in the first sealing ring groove.

6. A preselect valve according to claim 5, characterised in that: The outer side of the quick plug connector assembly is provided with a second sealing ring groove, and a sealing ring is arranged in the second sealing ring groove.

7. A preselect valve according to claim 6, characterised in that: The outer diameter of the sealing ring, the inner diameter of the first sealing ring groove and the inner diameter of the second sealing ring groove are consistent.

8. A preselect valve according to claim 7, characterised in that: The quick plug connector assembly is connected to the valve cavity by screw locking.

9. A preselect valve according to claim 8, characterised in that: The outer sides of the two sealing rings are in sealing contact with the inner wall of the valve cavity.

10. A preselect valve according to claim 9, characterized in that: The other end of the gear shifting button is located outside the shell.

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