Solenoid valve connecting structure of hydraulic shock absorber

Abstract

An electromagnetic valve connecting structure of a hydraulic shock absorber comprises a hydraulic cylinder and an electromagnetic valve, an electromagnetic valve mounting seat is welded to an outer oil hole formed in the cylinder wall of an outer cylinder of the hydraulic cylinder, the electromagnetic valve is arranged in the electromagnetic valve mounting seat, and an inner cylinder is arranged between the outer cylinder of the hydraulic cylinder and a working cylinder. An inner oil hole formed in the cylinder wall of the inner cylinder is opposite to the outer oil hole, a fixing seat is welded to the position of the inner oil hole, a valve seat of the electromagnetic valve is located in the electromagnetic valve installation seat, a T-shaped oil passing seat with an axial through hole is arranged between the valve seat and the fixing seat, and the small end of the T-shaped oil passing seat is inserted into an inner hole of the fixing seat. The T-shaped oil passing seat is in sealing connection with an inner hole of the fixing seat through an arranged circumferential sealing ring, the large end of the T-shaped oil passing seat makes contact with the oil inlet end of the valve seat through an arranged shaft end sealing ring to form sealing, an inner oil hole is communicated with the valve seat, and a supporting block used for limiting is arranged between a shaft shoulder of the large end of the T-shaped oil passing seat and the electromagnetic valve installation seat.

Description

Technical Field

[0001] The utility model relates to the field of automobile shock absorbers, in particular to a solenoid valve connection structure of a hydraulic shock absorber. Background Art

[0002] The shock absorber is a very important part of the car, which can ensure the smooth driving of the car and reduce vibration. In the shock absorber, the connection between the solenoid valve and the hydraulic cylinder is a very important part. The patent document with publication number CN 211288575 U discloses a solenoid valve connection structure of the shock absorber. In this connection structure, the lower end of the valve seat is directly connected to the outer flange hole of the inner cylinder of the hydraulic cylinder, and the upper end of the valve seat is threadedly connected to the solenoid valve. However, in this structure, the lower end of the valve seat is directly connected to the inner cylinder and the upper end is then threadedly connected to the solenoid valve. The assembly accuracy is high, the assembly is difficult, and the assembly is difficult to achieve. It is easy to cause the solenoid valve to be assembled improperly, affecting the use of the solenoid valve. If the solenoid valve needs maintenance and repair, it is troublesome to disassemble. Therefore, it is necessary to improve this connection structure. Summary of the Invention

[0003] The purpose of the present invention is to address the shortcomings of the prior art and provide a solenoid valve connection structure for a hydraulic shock absorber. This connection structure can connect the solenoid valve in the shock absorber to the hydraulic cylinder, has low assembly precision requirements, is easy to assemble, and can meet the use requirements of the shock absorber.

[0004] The purpose of the utility model is achieved by adopting the following scheme: a solenoid valve connection structure of a hydraulic shock absorber, comprising a hydraulic cylinder and a solenoid valve, wherein a solenoid valve mounting seat is welded at an outer oil hole provided on the cylinder wall of an outer cylinder of the hydraulic cylinder, the solenoid valve is arranged in the solenoid valve mounting seat, an inner cylinder is arranged between the outer cylinder of the hydraulic cylinder and a working cylinder, an inner oil hole provided on the cylinder wall of the inner cylinder is opposite to the outer oil hole, a fixing seat is welded at the inner oil hole, the lower end of the solenoid valve of the solenoid valve is located in the solenoid valve mounting seat, and a T-shaped plate with an axial through hole is arranged between the lower end of the solenoid valve and the fixing seat. The T-type oil-passing seat is a T-type oil-passing seat, the small end of the T-type oil-passing seat is inserted into the inner hole of the fixed seat, and a sealed connection is formed with the inner hole of the fixed seat through a circumferential sealing ring. The large end of the T-type oil-passing seat contacts the oil inlet end of the lower end of the solenoid valve through the shaft end sealing ring, forming a seal, so that the inner oil hole is connected with the lower end of the solenoid valve. A supporting block for limiting is provided between the large end shaft shoulder of the T-type oil-passing seat and the solenoid valve mounting seat. The supporting block is annular, and the small end of the T-type oil-passing seat is connected to the fixed seat after passing through the inner hole of the supporting block. A plurality of oil holes are provided on the circumference of the inner hole of the supporting block.

[0005] The large end of the T-shaped oil-passing seat contacts the oil inlet at the lower end of the solenoid valve through an axially extending boss to form a seal.

[0006] The solenoid valve is threadedly connected to the solenoid valve mounting seat.

[0007] The oil inlet at the lower end of the solenoid valve, the T-shaped oil passing seat, the supporting block, the solenoid valve mounting seat and the fixing seat are coaxial.

[0008] The utility model has the advantages that the electromagnetic valve connection structure of the hydraulic shock absorber has low assembly precision requirements, is easy to assemble, has good sealing performance, is simple in structure, and has low processing cost; and is easy to disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the oil-passing seat structure in the utility model;

[0011] Figure 3 This is a schematic diagram of the support block structure in the utility model;

[0012] Figure 4 This is a structural diagram of Example 2 of the present utility model. DETAILED DESCRIPTION Example

[0013] like Figures 1 to 3As shown, a solenoid valve connection structure of a hydraulic shock absorber includes a hydraulic cylinder and a solenoid valve 1. A solenoid valve mounting seat 2 is welded to an outer oil hole 10a provided on the cylinder wall of the outer cylinder 10 of the hydraulic cylinder. The solenoid valve 1 is arranged in the solenoid valve mounting seat 2, and the solenoid valve 1 and the solenoid valve mounting seat 2 are threadedly connected. An inner cylinder 6 is arranged between the outer cylinder 10 of the hydraulic cylinder and the working cylinder 11. An inner oil hole 6a provided on the cylinder wall of the inner cylinder 6 is opposite to the outer oil hole 10a. A fixing seat 5 is welded to the inner oil hole 6a. The solenoid valve lower end 9 of the solenoid valve 1 is located in the solenoid valve mounting seat 2. A T-shaped oil-passing seat 4 with an axial through hole 4d is arranged between the lower end 9 of the solenoid valve and the fixing seat 5. The small end of the T-shaped oil-passing seat 4 is inserted into the inner hole of the fixing seat 5, and is formed with the inner hole of the fixing seat 5 by the provided circumferential sealing ring 7. The T-shaped oil-passing seat 4 is sealed with a large end that contacts the oil inlet of the solenoid valve's lower end 9 via a shaft-end sealing ring 3, forming a seal that connects the inner oil hole 6a with the solenoid valve's lower end 9. The axial through-hole 4d of the T-shaped oil-passing seat 4 has a larger flow area than the oil inlet of the solenoid valve's lower end 9, ensuring smooth flow of oil from the inner cavity to the solenoid valve and then to the outer cavity, forming an oil circuit. By adjusting the current of the solenoid valve, the oil throttling area is varied, enabling continuous adjustment of the shock absorber's damping force. A support block 8 is provided between the large end shoulder of the T-shaped oil-passing seat 4 and the solenoid valve mounting base 2. This support block 8 is annular in shape, providing a position limit. The small end of the T-shaped oil-passing seat 4 passes through the inner hole 8b of the support block 8 and connects to the fixed base 5. Multiple oil holes 8a are arranged around the inner hole 8b of the support block 8. The oil inlet of the solenoid valve's lower end 9, the T-shaped oil-passing seat 4, the support block 8, the solenoid valve mounting base 2, and the fixed base 5 are coaxial. The support block 8 and the oil-passing seat 4 can be made of powder metallurgy. The processing cost of forming the parts by molds made of powder metallurgy is low, and the consistency of the part size tolerance and finish is good.

[0014] Before the shock absorber is put into operation, first weld the fixing seat 5 to the opening of the inner cylinder 6 of the hydraulic cylinder, then weld the solenoid valve mounting seat 2 to the outer oil hole 10a of the outer cylinder 10 of the hydraulic cylinder, and place the support block 8 at the bottom of the solenoid valve mounting seat 2. Assemble the sealing rings into the radial sealing groove 4b and the axial sealing groove 4a on the T-type oil-passing seat 4 respectively. The T-type oil-passing seat 4 with the sealing ring assembled is connected to the fixing seat 5 through the support block 8. The sealing ring is used for sealing. Assemble the solenoid valve 1 into the solenoid valve mounting seat 2. The lower end 9 of the solenoid valve contacts the upper end of the T-type oil-passing seat 4. The sealing ring seals the lower end 9 of the solenoid valve with the T-type oil-passing seat 4. The support block 8 limits the T-type oil-passing seat 4, so that the sealing performance between the T-type oil-passing seat 4 and the lower end 9 of the solenoid valve is better and easy to disassemble and maintain later. After connecting the solenoid valve 1 to the hydraulic cylinder, start the solenoid valve 1, and the oil is transported from the inner cylinder 6 through the T-shaped oil seat 4 to the oil inlet of the lower end 9 of the solenoid valve, and enters the solenoid valve 1 from the lower end 9 of the solenoid valve. The oil is then transported by the solenoid valve 1 to the oil outlet 9a of the lower end 9 of the solenoid valve and output, and the oil passes through the oil hole 8a of the support block 8 and flows to the outer cylinder 10 of the hydraulic cylinder. Example

[0015] like Figure 4 As shown, the large end of the T-shaped oil seat 4 can also contact the oil inlet of the lower end 9 of the solenoid valve through the axially extending boss 4e. The boss 4e is pressed by the lower end face 9 of the solenoid valve to deform the boss 4e to form a seal. This sealing structure can prevent the sealing ring from failing due to high-temperature aging.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A solenoid valve connection structure for a hydraulic shock absorber, comprising a hydraulic cylinder and a solenoid valve (1), wherein a solenoid valve mounting seat (2) is welded at an outer oil hole (10a) provided on the cylinder wall of an outer cylinder (10) of the hydraulic cylinder, wherein the solenoid valve (1) is arranged in the solenoid valve mounting seat (2), an inner cylinder (6) is arranged between the outer cylinder (10) and a working cylinder (11) of the hydraulic cylinder, an inner oil hole (6a) provided on the cylinder wall of the inner cylinder (6) is opposite to the outer oil hole (10a), a fixing seat (5) is welded at the inner oil hole (6a), and a solenoid valve lower end (9) of the solenoid valve (1) is located in the solenoid valve mounting seat (2), characterized in that: A T-shaped oil-passing seat (4) with an axial through hole (4d) is arranged between the lower end (9) of the solenoid valve and the fixed seat (5). The small end of the T-shaped oil-passing seat (4) is inserted into the inner hole of the fixed seat (5) and forms a sealed connection with the inner hole of the fixed seat (5) through a circumferential sealing ring (7). The large end of the T-shaped oil-passing seat (4) contacts the oil inlet end of the lower end (9) of the solenoid valve through the axial end sealing ring (3) to form a seal, so that the inner oil hole (6a) is connected with the lower end (9) of the solenoid valve. A support block (8) for limiting is arranged between the large end axial shoulder of the T-shaped oil-passing seat (4) and the solenoid valve mounting seat (2). The support block (8) is annular. The small end of the T-shaped oil-passing seat (4) passes through the inner hole (8b) of the support block (8) and is connected to the fixed seat (5). A plurality of oil-passing holes (8a) are arranged on the circumference of the inner hole (8b) of the support block (8).

2. The solenoid valve connection structure of the hydraulic shock absorber according to claim 1, characterized in that: The large end of the T-shaped oil-passing seat (4) contacts the oil inlet of the lower end (9) of the solenoid valve through an axially extending boss (4e), thereby forming a seal.

3. The solenoid valve connection structure of the hydraulic shock absorber according to claim 1, characterized in that: The solenoid valve (1) and the solenoid valve mounting seat (2) are threadedly connected.

4. The solenoid valve connection structure of the hydraulic shock absorber according to claim 1, characterized in that: The oil inlet at the lower end (9) of the solenoid valve, the T-shaped oil-passing seat (4), the support block (8), the solenoid valve mounting seat (2), and the fixing seat (5) are coaxial.

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