One-way valve structure of shock absorber recovery electromagnetic valve oil way

Abstract

A one-way valve structure of a shock absorber recovery solenoid valve oil way comprises an outer cylinder, an inner cylinder and a working cylinder of a shock absorber, the inner cylinder is located between the working cylinder and the outer cylinder, the working cylinder is communicated with the inner cylinder through an oil hole formed in the cylinder wall, and an inner cylinder end cover is arranged on the working cylinder and connected with the tail end of the inner cylinder. An oil passing channel is arranged on the inner cylinder end cover to enable the inner cylinder to be communicated with the outer cylinder, an elastic gasket and a valve plate are arranged between the inner cylinder and the axial end of the inner cylinder end cover to form a one-way valve, two concentric annular bosses are arranged on the axial end face of the inner cylinder end cover, an oil passing groove is formed between the two annular bosses, and the oil passing groove is communicated with the oil passing channel. The protruding heights of the annular bosses of the two concentric circles are the same, and the top faces of the two annular bosses are used for making contact with a valve block to form a sealing face. According to the one-way valve structure of the shock absorber recovery electromagnetic valve oil way, the problem of reverse leakage of the one-way valve structure is solved, and the product performance of a shock absorber is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile shock absorber, concretely relates to a one-way valve structure of shock absorber recovery electromagnetic valve oil circuit. BACKGROUND

[0002] The double electromagnetic valve control type shock absorber is an important component of the suspension, can realize the separate control and continuous change of the recovery damping force and compression damping force, and effectively improves the ride comfort and control stability of the vehicle. When the wheel jumps up, the shock absorber is in the compression state, the piston rod assembly moves to the inside of the shock absorber, the volume of the lower cavity of the working cylinder decreases and the pressure increases, at the same time, the volume of the upper cavity of the working cylinder increases and the pressure decreases, part of the oil liquid in the lower cavity of the working cylinder flows into the oil storage cavity, and part of the oil liquid flows into the upper cavity of the working cylinder, and the oil liquid in the upper cavity of the working cylinder flows through the overflow hole of the working cylinder, flows through the recovery electromagnetic valve assembly, and then flows into the oil storage cavity. At this time, the oil liquid in the upper cavity of the working cylinder is insufficiently compensated, which causes the idle stroke problem of the indicator diagram of the shock absorber damping force, and seriously affects the performance of the shock absorber. Therefore, it is necessary to provide a one-way valve structure in the shock absorber. The patent document with the publication number CN 220828465 U discloses a double valve control type semi-active shock absorber. A one-way valve structure is disclosed in the shock absorber. However, there is a wide sealing surface between the press-in cover 306 and the flat gasket 305 in the one-way valve structure, thereby forming a wide valve line surface structure. The flatness of the wide valve line surface structure is difficult to guarantee during processing, especially when the annular groove is processed, which is easy to scratch the wide valve line surface, resulting in poor sealing performance of the wide valve line surface and the flat gasket, causing the one-way valve to leak, thereby causing the low-speed damping force of the shock absorber to be unqualified, affecting the product performance of the shock absorber. And the wide valve line surface is also easy to cause oil accumulation between the press-in cover 306 and the flat gasket 305, affecting the action of the shock absorber.

[0003] Therefore, how to avoid the leakage of the one-way valve structure is a problem to be solved. SUMMARY

[0004] The utility model aims at the corresponding deficiencies of the prior art, and provides a one-way valve structure of a shock absorber recovery electromagnetic valve oil circuit. The one-way valve structure can solve the problem of reverse leakage of the one-way valve.

[0005] The utility model discloses a kind of one-way valve structures of restoring solenoid valve oil circuit of shock absorber, including the outer cylinder of shock absorber, inner cylinder and working cylinder, the inner cylinder is located between working cylinder and outer cylinder, the working cylinder is communicated with inner cylinder by oil hole being set in cylinder wall, one inner cylinder end cover is set on the working cylinder and the end of inner cylinder is connected, oil passage is set on the inner cylinder end cover and inner cylinder is communicated with outer cylinder, elastic washer and valve piece are formed one-way valve between the axial end of inner cylinder and inner cylinder end cover, the axial end surface of inner cylinder end cover is provided with two concentric annular bosses, and the oil passage groove between two annular bosses is oil passage, the protruding height of the two concentric annular bosses is same, and the top surface of two annular bosses is used to contact with valve piece and form sealing surface.

[0006] The sum of the width of the top surface of the two annular bosses is 1 / 10-1 / 9 of the axial end surface width of the inner cylinder end cover.

[0007] The side of the one-way valve structure is provided with restoring solenoid valve.

[0008] The end of the inner cylinder is fixed after shrink fit with the inner cylinder end cover.

[0009] The end of the working cylinder passes through the through hole of the inner cylinder end cover, and an O-shaped sealing ring is arranged at the connection of the inner cylinder end cover and the working cylinder.

[0010] The end of the working cylinder passes through the through hole of the inner cylinder end cover, and an O-shaped sealing ring and a check ring are arranged at the connection of the inner cylinder end cover and the working cylinder.

[0011] The elastic washer is a wave spring washer.

[0012] The shock absorber is a double-valve control shock absorber, and a compression solenoid valve is further arranged on the shock absorber.

[0013] The utility model has the advantages that the problem of reverse leakage of one-way valve structure is solved, and the one-way valve compensates oil in the upper cavity of working cylinder, improves the idle range of shock absorber damping force indicator diagram, and improves the product performance of shock absorber. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the one-way valve structure schematic view in the utility model;

[0015] Figure 2 It is the inner cylinder end cover structure schematic view in one-way valve structure;

[0016] Figure 3 It is Figure 2 The enlarged schematic view in A of the utility model;

[0017] Figure 4 It is the assembly schematic view of one-way valve structure assembled on shock absorber. DETAILED DESCRIPTION

[0018] As Figures 1 to 4 shown, a one-way valve structure of a restoring solenoid valve oil passage of a shock absorber includes an outer cylinder 3, an inner cylinder 2 and a working cylinder 1 of the shock absorber, the inner cylinder 2 is located between the working cylinder 1 and the outer cylinder 3, the working cylinder 1 is communicated with the inner cylinder 2 through an oil hole 9 arranged on the cylinder wall, an inner cylinder end cover 4 is arranged on the working cylinder 1 and connected with the end of the inner cylinder 2, and the end of the inner cylinder 2 is fixedly connected with the inner cylinder end cover 4 after interference fit. An oil passing channel 4-5 is arranged on the inner cylinder end cover 4 to communicate the inner cylinder 2 with the outer cylinder 3, a resilient washer 7 and a valve plate 6 are arranged between the axial end of the inner cylinder 2 and the inner cylinder end cover 4 to form a one-way valve, and the resilient washer 7 is a wave spring washer. The end of the working cylinder 1 penetrates through a through hole 4-3 of the inner cylinder end cover 4, an O-shaped sealing ring 5 is arranged at the connecting position of the inner cylinder end cover 4 and the working cylinder 1 when the pressure of the upper cavity of the working cylinder 1 is low, and an O-shaped sealing ring 5 and a check ring 5a are arranged at the connecting position of the inner cylinder end cover 4 and the working cylinder 1 when the pressure of the upper cavity of the working cylinder 1 is high. Two concentric annular bosses 4-4 are arranged on the axial end surface of the inner cylinder end cover 4, an oil passing groove 4-2 is arranged between the two annular bosses 4-4, the oil passing groove 4-2 is communicated with the oil passing channel 4-5, the protrusion heights of the two concentric annular bosses 4-4 are the same, the top surfaces of the two annular bosses 4-4 are used to contact the valve plate 6 to form a sealing surface 4-1, and the valve plate 6 is in close contact with the sealing surface 4-1 under the action of the resilient washer. The sum of the widths of the top surfaces of the two annular bosses 4-4 is 1 / 10-1 / 9 of the width of the axial end surface of the inner cylinder end cover 4. A restoring solenoid valve 8 is arranged on the side of the one-way valve structure. The shock absorber is a double-valve control shock absorber, and a compression solenoid valve is further arranged on the shock absorber.

[0019] The oil passing groove arranged on the sealing surface of the inner cylinder end cover and the valve plate makes the sealing surface of the inner cylinder end cover and the valve plate narrow, the narrow sealing surface has lower process requirement in processing, and the annular boss will not be scratched when the annular groove of the inner cylinder end cover is processed, so that the flatness of the contact surface can be better guaranteed, the valve plate is in better contact with the narrow sealing surface, the oil liquid will not be accumulated between the sealing surfaces, the one-way valve will not have reverse leakage of oil liquid, and the product performance of the shock absorber is improved.

[0020] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and the changes made by the person skilled in the art without departing from the spirit of the present application fall within the protection scope of the present application.

Claims

1. A kind of single-way valve structure of shock absorber recovery electromagnetic valve oil circuit, including the outer cylinder (3) of shock absorber, inner cylinder (2) and working cylinder (1), the inner cylinder (2) between working cylinder (1) and outer cylinder (3), the working cylinder (1) is communicated with inner cylinder (2) by the oil hole (9) of cylinder wall setting, a inner cylinder end cover (4) is set on the working cylinder (1) and the end of inner cylinder (2) is connected, the inner cylinder end cover (4) is set up and oil passage (4-5) is connected with inner cylinder (2) and outer cylinder (3), the elastic washer (7) between the axial end of inner cylinder (2) and inner cylinder end cover (4) is formed single-way valve with valve piece (6), it is characterized by: The axial end face of the inner cylinder end cover (4) is provided with two concentric annular bosses (4-4), and an oil passing groove (4-2) is arranged between the two annular bosses (4-4), the oil passing groove (4-2) is communicated with an oil passing channel (4-5), the two concentric annular bosses (4-4) have the same height, and the top faces of the two annular bosses (4-4) are used to contact the valve piece (6) to form a sealing surface (4-1).

2. The single valve structure of the rebound solenoid valve oil passage of the shock absorber according to claim 1, characterized in that: The sum of the widths of the top faces of the two annular bosses (4-4) is 1 / 10-1 / 9 of the width of the axial end face of the inner cylinder end cover (4).

3. The single valve structure of the rebound solenoid valve oil passage of the shock absorber according to claim 1, characterized in that: The side of the one-way valve structure is provided with a restoring electromagnetic valve (8).

4. The single valve structure of the rebound solenoid valve oil passage of the shock absorber according to claim 1, characterized by: The end of the inner cylinder (2) is fixed by welding after interference fit with the inner cylinder end cover (4).

5. The single valve structure of the rebound solenoid valve oil passage of the shock absorber according to claim 1, characterized by: The end of the working cylinder (1) passes through the through hole (4-3) of the inner cylinder end cover (4), and an O-shaped sealing ring (5) is arranged at the connection between the inner cylinder end cover (4) and the working cylinder (1).

6. The single valve structure of the rebound solenoid valve oil passage of a shock absorber according to claim 1, characterized in that: The end of the working cylinder (1) passes through the through hole (4-3) of the inner cylinder end cover (4), and an O-shaped sealing ring (5) and a check ring (5a) are arranged at the connection between the inner cylinder end cover (4) and the working cylinder (1).

7. The single valve structure of the rebound solenoid valve oil passage of a shock absorber according to claim 1, characterized in that: The elastic washer (7) is a wave spring washer.

8. The single valve structure of the rebound solenoid valve oil passage of the shock absorber according to claim 1, characterized by: The shock absorber is a double valve control shock absorber, and the shock absorber is further provided with a compression electromagnetic valve.

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