Engine oil check valve of automobile engine

Abstract

The utility model discloses an engine oil check valve of an automobile engine, which comprises a valve body, a spring seat is mounted on the valve body, and three claws of the spring seat form two mounting cavities; a spring is mounted in the spring mounting cavity, and a steel ball is mounted in the steel ball mounting cavity; a plug is arranged at the bottom of the valve body, the narrow end of the plug is embedded into the limiting step of the spring seat, the contact face of the narrow end and the steel ball is recessed inwards to form an inner arc groove, the wide end of the plug extends out of the valve body, a through hole is formed in the plug, and the diameter of the through hole is smaller than that of the steel ball. According to the utility model, the two mounting cavities are formed by the three clamping jaws and are designed according to the sizes and shapes of the spring and the steel ball, so that the spring can be stably stressed in the spring mounting cavity, and the steel ball can be limited to move in the steel ball mounting cavity; and sharp contact acting force does not exist between the steel ball mounting cavity and the steel ball through the arc-shaped structure, so that the abrasion of the steel ball is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an oil check valve for an automobile engine. Background Art

[0002] Engine oil, that is, engine lubricating oil, can lubricate and reduce friction, assist in cooling and temperature reduction, seal and prevent leakage, prevent rust and corrosion, and buffer shock for the engine. It is known as the "blood" of the automobile. Engine oil consists of two parts: base oil and additives. The base oil is the main component of the lubricating oil, which determines the basic properties of the lubricating oil. The additives can make up for and improve the deficiencies in the performance of the base oil and endow some new properties, and are an important part of the lubricating oil.

[0003] Engine oil is controlled by an oil pump during operation. When needed, the oil pump can automatically pump out the engine oil to achieve the lubrication effect. After the engine oil is pumped out, a check valve needs to be installed to prevent the pumped-out engine oil from flowing back into the oil tank. The check valves in the prior art generally achieve the function of unidirectional oil delivery through the cooperation of a steel ball and a spring, but have the following defects:

[0004] 1. The installation space of the spring is equivalent to that of the steel ball, so that the spring is prone to tilt during the deformation process, the force is uneven, and the stability is poor; the service life of the spring is shortened, and the flow output is also unstable due to uneven deformation.

[0005] 2. The steel ball is in the valve closed state when stationary, but there is no limit to the maximum position of the steel ball during the movement process, resulting in no limit to the force on the spring, which will also cause the spring deformation to be large or small, or the spring to bear greater pressure, resulting in a shorter spring life. Or some check valves limit the maximum position of the steel ball by setting a limiting step, but the edge of the limiting step is a right angle, which is prone to sharp contact with the steel ball, causing fine wear on the steel ball at the right angle. The service life of an automobile is generally more than ten years. After long-term wear, it may have a certain impact on the sealing effect and there may be a certain leakage situation.

[0006] 3. The spring and steel ball of the existing check valve need to be installed inside the valve body, and most of the assembly methods are relatively complex, increasing the production difficulty. Content of the Utility Model

[0007] The purpose of the utility model is to provide an oil check valve for an automobile engine.

[0008] To achieve the above object, in an embodiment of the present utility model, an oil check valve for an automobile engine is provided, which includes a valve body. The valve body is provided with an external installation thread and an oil outlet hole; inside the inlet end of the valve body, a spring seat is installed. The spring seat has three claws, and the gaps between the three claws form a flow channel. The three claws form two installation cavities, namely a spring installation cavity and a steel ball installation cavity; a spring is installed in the spring installation cavity, and a steel ball is installed in the steel ball installation cavity. The diameter of the spring installation cavity is smaller than that of the steel ball installation cavity. One end of the steel ball installation cavity close to the spring installation cavity has an arc-shaped structure corresponding to the steel ball;

[0009] A plug is provided at the bottom of the valve body. The narrow end of the plug is embedded on the limiting step of the spring seat. The contact surface between the narrow end and the steel ball is recessed inward to form an inner arc groove. The wide end of the plug extends to the outside of the valve body. The inside of the plug has a through hole, and the diameter of the through hole is smaller than the diameter of the steel ball.

[0010] In an optimized scheme of the present utility model, a ring groove is provided on the valve body, and a sealing ring is provided in the ring groove; an internal hexagonal screw hole is provided at one end of the valve body away from the plug.

[0011] In an optimized scheme of the present utility model, a cylindrical boss is provided in the spring installation cavity. One end of the spring is nested on the boss, and the other end of the spring contacts the steel ball.

[0012] In summary, the present utility model has the following advantages:

[0013] 1. In the present utility model, two installation cavities are formed by three claws. The two installation cavities are designed according to the sizes and shapes of the spring and the steel ball, so that the spring can be stably stressed in the spring installation cavity, and the steel ball can be limited to move in the steel ball installation cavity. Moreover, due to the arc-shaped structure, there is no sharp contact force between the steel ball installation cavity and the steel ball, reducing the wear of the steel ball.

[0014] 2. In the present utility model, a plug with a narrow end and a wide end is used for plugging. At the same time, the contact surface between the plug and the steel ball is optimized to be an inner arc groove, which can increase the contact area between the inner side of the plug and the steel ball, improve the sealing effect, and the plug can be installed after the spring and the steel ball are installed, facilitating the installation of the spring and the steel ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of the oil check valve in an embodiment of the present utility model;

[0016] Figure 2 is an exploded three-dimensional view of the oil check valve in an embodiment of the present utility model;

[0017] Figure 3 is an exploded plan view of the oil check valve in an embodiment of the present utility model;

[0018] Figure 4 Schematic diagram of a spring seat in an embodiment of the present utility model;

[0019] Figure 5 Side view of a spring seat in an embodiment of the present utility model.

[0020] Wherein, 1. Valve body; 2. Installation external thread; 3. Oil outlet hole; 4. Spring seat; 5. Claw; 6. Spring installation cavity; 7. Ball installation cavity; 8. Spring; 9. Ball; 10. Arc structure; 11. Plug; 101. Narrow end; 102. Wide end; 13. Inner arc groove; 14. Through hole; 15. Ring groove; 16. Sealing ring; 17. Hex socket screw hole; 18. Boss; 19. Limit step. Detailed implementation manner

[0021] The present utility model provides an oil check valve for an automobile engine, including a valve body 1, on which an installation external thread 2 and an oil outlet hole 3 are provided. The installation external thread 2 is for facilitating the installation of the entire check valve on engine accessories and achieving fixation through threaded connection. At the same time, for convenient installation, preferably, a hex socket screw hole is provided at one end of the valve body 1 away from the plug 11. When installing, a tool is inserted into the hex socket screw hole 17 to turn the entire check valve. Further, to improve the sealing performance, preferably, a ring groove 15 is also provided on the valve body 1, and a sealing ring 16 is provided in the ring groove.

[0022] Inside the inlet end of the valve body 1, a spring seat 4 is installed. The spring seat 4 can be directly embedded into the valve body 1. There can be a very small tolerance between the spring seat 4 and the valve body 1, so that the spring seat 4 can be smoothly snapped into the valve body 1 and will not easily fall off from the valve body 1.

[0023] The spring seat 4 has three claws 5, which can be evenly distributed. The gaps between the three claws 5 form a flow channel. The three claws 5 form two installation cavities, namely a spring installation cavity 6 and a ball installation cavity 7. A spring 8 is installed in the spring installation cavity, and a ball 9 is installed in the ball installation cavity. The diameter of the spring installation cavity 6 is smaller than that of the ball installation cavity. One end of the ball installation cavity close to the spring installation cavity has an arc structure 10 corresponding to the ball 9, so that the ball 9 can contact the arc structure after reaching the maximum position. The radian of the arc structure is the same as that of the ball 9, so that the contact area between the ball installation cavity and the ball 9 is the largest at the maximum position, thereby increasing the force-bearing surface of the entire ball 9 and eliminating sharp force-bearing points, thus greatly reducing the wear of the ball 9.

[0024] A plug 11 is provided at the bottom of the valve body 1, and the plug 11 can enclose the steel ball 9 and the spring 8 inside. The narrow end of the plug 11 is embedded on the limiting step 19 of the spring seat 4, and the fixing method can adopt interference fit. The contact surface between the narrow end 101 and the steel ball 9 is recessed inward to form an inner arc groove 13, and the radian of the inner arc groove can also be the same as that of the steel ball 9, so that the contact area between the steel ball 9 and the plug 11 is the largest when the steel ball 9 is stationary, and the sealing effect is better. The wide end 102 of the plug 11 extends to the outside of the valve body 1, and a through hole 14 is provided inside the plug 11, and the diameter of the through hole is smaller than the diameter of the steel ball 9.

[0025] In the optimized embodiment of the present utility model, a cylindrical boss 18 is provided in the spring installation cavity. One end of the spring 8 is nested on the boss, and the other end of the spring 8 contacts the steel ball 9. The boss has a certain guiding function and also provides a structural basis for the installation and fixation of the spring 8. After the spring 8 is nested on the boss, the possibility of shaking is also reduced.

[0026] Although the specific implementation manners of the present utility model have been described in detail with reference to the accompanying drawings, it should not be construed as a limitation on the protection scope of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative labor still fall within the protection scope of this patent.

Claims

1. An engine oil check valve for an automobile, characterized in that: It includes a valve body, on which there are provided an external installation thread and an oil outlet hole; inside the inlet end of the valve body, there is installed a spring seat, the spring seat has three claws, the gaps between the three claws form a flow channel, and the three claws form two installation cavities, namely a spring installation cavity and a steel ball installation cavity; a spring is installed in the spring installation cavity, a steel ball is installed in the steel ball installation cavity, the diameter of the spring installation cavity is smaller than that of the steel ball installation cavity, and one end of the steel ball installation cavity close to the spring installation cavity has an arc-shaped structure corresponding to the steel ball; At the bottom of the valve body, there is provided a plug, the narrow end of the plug is embedded on the limit step of the spring seat, the contact surface between the narrow end and the steel ball is recessed inward to form an inner arc groove, the wide end of the plug extends to the outside of the valve body, and there is a through hole inside the plug, and the diameter of the through hole is smaller than the diameter of the steel ball.

2. The oil check valve for an automotive engine according to claim 1, wherein: A ring groove is provided on the valve body, and a sealing ring is provided in the ring groove; an internal hexagonal screw hole is provided at one end of the valve body away from the plug.

3. The oil check valve for an automobile engine according to claim 1, characterized in that: A cylindrical boss is provided in the spring installation cavity, one end of the spring is nested on the boss, and the other end of the spring contacts the steel ball.

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