Electro-hydraulic reversing valve

Abstract

The utility model belongs to the technical field of reversing valves, and particularly relates to an electro-hydraulic reversing valve which comprises an upper valve body and a lower valve body, a filter element is arranged in the upper valve body, a plug screw is arranged on the front end face of the filter element and fixedly connected with the upper valve body, a threaded connector is arranged on the front end face of the plug screw, and the lower valve body is fixedly connected with the lower valve body. A first combined gasket is arranged on one side of the threaded connector, the upper valve body and the lower valve body are fixedly connected through a first bolt, a paper pad is arranged between the upper valve body and the lower valve body, a second combined gasket is arranged on one side of the screw plug, and an electromagnetic valve is arranged on the front end face of the lower valve body. Electromagnetic valve iron is arranged on the upper end face of the electromagnetic valve, the rear end of the electromagnetic valve is arranged in the lower valve body, and a first valve element is arranged in the lower valve body. By arranging the filter element, pressure oil can enter the valve body oil duct after being filtered, so that a gearbox can work conveniently, and the using effect of the reversing valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, in particular to an electro-hydraulic reversing valve. Background Art

[0002] The existing electro-hydraulic reversing valve is prone to blockage of the valve body oil passage by hydraulic oil during use, making it difficult for the pressure oil to enter the gearbox, resulting in poor use effect. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides an electro-hydraulic reversing valve to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an electro-hydraulic reversing valve, comprising an upper valve body and a lower valve body, a filter element is arranged inside the upper valve body, a screw plug is arranged on the front end face of the filter element, the screw plug is fixedly connected to the upper valve body, a threaded joint is arranged on the front end face of the screw plug, a first combination gasket is arranged on one side of the threaded joint, the upper valve body and the lower valve body are fixedly connected by a first bolt, and a paper pad is arranged between the upper valve body and the lower valve body.

[0005] As an optimal technical solution of the present utility model, a second combination gasket is provided on one side of the screw plug, a solenoid valve is provided on the front end face of the lower valve body, a solenoid valve iron is provided on the upper end face of the solenoid valve, the rear end of the solenoid valve is provided inside the lower valve body, a first valve core is provided inside the lower valve body, a first wire plug is provided on the front end face of the first valve core and connected to the lower valve body, and a third combination gasket is provided below the first wire plug.

[0006] As an optimal technical solution of the present invention, a first spring is provided on the rear end face of the first valve core, the rear end of the first spring is fixedly connected to the bottom surface of the second valve core, and a second wire plug is provided on the rear end of the second valve core, and the second wire plug is fixedly connected to the lower valve body.

[0007] As a preferred technical solution of the present invention, a guide rod is provided at the rear end of the first valve core, a second spring passes through the guide rod, and the second spring is fixedly connected to the inner bottom surface of the second valve core.

[0008] As a preferred technical solution of the present invention, a circular plate is provided in the upper groove of the lower valve body, a steel ball is provided below the circular plate, and a fourth combined gasket is provided on the outer side of the upper valve body.

[0009] As a preferred technical solution of the present invention, an O-ring is provided in the groove of the filter element to cooperate with the screw plug, and an elastic washer is provided below the first bolt.

[0010] Compared with the prior art, the present invention provides an electro-hydraulic reversing valve with the following beneficial effects:

[0011] The utility model provides a filter element so that the pressure oil can enter the oil channel of the valve body after being filtered, thereby facilitating the operation of the gearbox and improving the use effect of the reversing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model;

[0013] Figure 2 For Figure 1 Cross-sectional view of line AA;

[0014] Figure 3 For Figure 1 Cross-sectional view of line BB;

[0015] Figure 4 of Figure 2 Cross-sectional view of CC line;

[0016] Figure 5 This is a three-dimensional Figure 1 ;

[0017] Figure 6 This is a three-dimensional Figure 2 .

[0018] In the figure: 1. threaded joint; 2. first combination gasket; 3. screw plug; 4. second combination gasket; 5. upper valve body; 6. first bolt; 7. elastic gasket; 8. paper gasket; 9. lower valve body; 10. first wire plug; 11. third combination gasket; 12. first valve core; 13. guide rod; 14. first spring; 15. second spring; 16. second valve core; 17. fourth combination gasket; 18. second wire plug; 19. solenoid valve iron; 20. solenoid valve; 21. O-ring; 22. filter element; 23. steel ball; 24. round plate. DETAILED DESCRIPTION

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

[0020] Example

[0021] See also Figure 1-6The utility model provides the following technical solutions: an electro-hydraulic reversing valve, comprising an upper valve body 5 and a lower valve body 9, a filter element 22 is provided inside the upper valve body 5, a screw plug 3 is provided on the front end surface of the filter element 22, the screw plug 3 is fixedly connected to the upper valve body 5, a threaded joint 1 is provided on the front end surface of the screw plug 3, a first combined gasket 2 is provided on one side of the threaded joint 1, the upper valve body 5 and the lower valve body 9 are fixedly connected by a first bolt 6, and a paper pad 8 is provided between the upper valve body 5 and the lower valve body 9.

[0022] In this embodiment,

[0023] Specifically, a second combination gasket 4 is provided on one side of the screw plug 3, a solenoid valve 20 is provided on the front end face of the lower valve body 9, a solenoid valve iron 19 is provided on the upper end face of the solenoid valve 20, and the rear end of the solenoid valve 20 is provided inside the lower valve body 9. A first valve core 12 is provided inside the lower valve body 9, and a first wire plug 10 is provided on the front end face of the first valve core 12 to be connected to the lower valve body 9. A third combination gasket 11 is provided below the first wire plug 10.

[0024] Specifically, a first spring 14 is provided on the rear end face of the first valve core 12 , and the rear end of the first spring 14 is fixedly connected to the bottom face of the second valve core 16 . A second wire plug 18 is provided on the rear end of the second valve core 16 , and the second wire plug 18 is fixedly connected to the lower valve body 9 .

[0025] Specifically, a guide rod 13 is provided at the rear end of the first valve core 12 , a second spring 15 passes through the guide rod 13 , and the second spring 15 is fixedly connected to the inner bottom surface of the second valve core 16 .

[0026] Specifically, a circular plate 24 is provided in the upper groove of the lower valve body 9 , a steel ball 23 is provided below the circular plate 24 , and a fourth combined gasket 17 is provided on the outer side of the upper valve body 5 .

[0027] Specifically, an O-ring 21 is provided in the groove of the filter element 22 to cooperate with the screw plug 3 , and an elastic washer 7 is provided below the first bolt 6 .

[0028] The working principle and usage process of the utility model are as follows: the entire device is made of HT250, the valve core is made of 45# steel, and the spring is 60si2Mn; when using this device, one side of the electronically controlled speed shift control valve is connected to the gearbox, the threaded joint is connected to the oil tank, and the solenoid valve of the electronically controlled speed shift control valve is connected to the vehicle's control system to operate the valve body and control the gearbox. The working pressure of the oil inlet P is adjusted to 1.3~1.5Mpa. When the solenoid valve is energized, oil is introduced into the gear position, thereby realizing gear control.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electro-hydraulic directional control valve, comprising an upper valve body (5) and a lower valve body (9), characterized in that: A filter element (22) is provided inside the upper valve body (5), a screw plug (3) is provided on the front end face of the filter element (22), the screw plug (3) is fixedly connected to the upper valve body (5), a threaded joint (1) is provided on the front end face of the screw plug (3), a first combined gasket (2) is provided on one side of the threaded joint (1), the upper valve body (5) and the lower valve body (9) are fixedly connected by a first bolt (6), and a paper pad (8) is provided between the upper valve body (5) and the lower valve body (9).

2. The electro-hydraulic directional control valve according to claim 1, characterized in that: A second combined gasket (4) is provided on one side of the screw plug (3), a solenoid valve (20) is provided on the front end face of the lower valve body (9), a solenoid valve iron (19) is provided on the upper end face of the solenoid valve (20), a rear end of the solenoid valve (20) is provided inside the lower valve body (9), a first valve core (12) is provided inside the lower valve body (9), a first wire plug (10) is provided on the front end face of the first valve core (12) and is connected to the lower valve body (9), and a third combined gasket (11) is provided below the first wire plug (10).

3. The electro-hydraulic directional control valve according to claim 2, characterized in that: A first spring (14) is provided on the rear end face of the first valve core (12), and the rear end of the first spring (14) is fixedly connected to the bottom face of the second valve core (16). A second wire plug (18) is provided on the rear end of the second valve core (16), and the second wire plug (18) is fixedly connected to the lower valve body (9).

4. The electro-hydraulic directional control valve according to claim 3, characterized in that: A guide rod (13) is provided at the rear end of the first valve core (12), a second spring (15) passes through the interior of the guide rod (13), and the second spring (15) is fixedly connected to the inner bottom surface of the second valve core (16).

5. The electro-hydraulic directional control valve according to claim 4, characterized in that: A circular plate (24) is provided in the upper groove of the lower valve body (9), a steel ball (23) is provided below the circular plate (24), and a fourth combined gasket (17) is provided on the outer side of the upper valve body (5).

6. The electro-hydraulic directional control valve according to claim 5, characterized in that: An O-ring (21) is provided in the groove of the filter element (22) and cooperates with the screw plug (3). An elastic washer (7) is provided below the first bolt (6).

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