Electronic control shock absorber with double electromagnetic valves

Abstract

The present invention provides an electronically controlled shock absorber having double solenoid valves, comprising: a cylinder (110) having an internal and external dual structure, the internal space of which is divided into a compression chamber and a rebound chamber, and the external space of which has a reservoir chamber (117); a compression solenoid valve (180) mounted on the outside of the cylinder barrel (110); and a spring-back solenoid valve (190) attached to the outside of the cylinder tube (110), the compression solenoid valve (180) and the spring-back solenoid valve (190) being disposed at a predetermined interval from each other in the circumferential direction about the cylinder tube axis.

Description

Technical Field

[0001] The invention relates to an electronically controlled shock absorber for a vehicle, and in particular to an electronically controlled shock absorber with a double solenoid valve. Background Art

[0002] When a car is driving, the wheels are constantly subjected to vibration or impact from the road. When the vibration or impact transmitted through the wheels is directly transmitted to the body and steering wheel, the ride comfort and driving stability will be significantly reduced. In order to alleviate this vibration or impact, the car must have a suspension device. Shock absorbers, springs, suspension arms, etc. are the main components of the suspension device.

[0003] The shock absorber includes a cylinder, a piston rod, a piston valve, etc. The piston valve is located inside the cylinder in a state of being combined with the piston rod to generate a damping force.

[0004] The shock absorber has the following characteristics: when the damping force of the shock absorber is configured to be weak, the ride comfort can be improved by absorbing the vibration caused by the unevenness of the road surface. On the contrary, when the damping force is configured to be high, the change of the vehicle body posture is suppressed, thereby improving the handling stability. Therefore, in the prior art, a shock absorber with different damping force characteristics is usually selected according to the purpose of use of the vehicle.

[0005] Recently, a damping force variable shock absorber has been developed that can appropriately adjust the damping force characteristics according to the road surface, the driving state, and the like by installing a damping force variable valve that can appropriately adjust the damping force characteristics of the shock absorber.

[0006] As an example, refer to Figure 1 , a variable damping force shock absorber with a dual solenoid valve structure is developed, which includes a rebound solenoid valve 90 for adjusting the damping force during the rebound stroke and a compression solenoid valve 80 for adjusting the damping force during the compression stroke.

[0007] The interior of the cylinder that constitutes the shock absorber is divided into a compression chamber and a rebound chamber by a piston valve, and each chamber is filled with a fluid such as oil.

[0008] During the compression stroke, the piston valve pressurizes the fluid in the compression chamber, so that the compression chamber becomes high pressure, and relatively, the rebound chamber becomes low pressure. During the rebound stroke, the piston valve pressurizes the fluid in the rebound chamber, so that the rebound chamber becomes high pressure, and relatively, the compression chamber becomes low pressure.

[0009] Reference Figures 2 to 5 , an operating structure of a damping force variable shock absorber of Korean Patent Publication No. 10-2023-0068294 (Patent Document 1), which is a prior art having a dual solenoid valve structure, is described.

[0010] exist Figure 2 and Figure 3 During the compression stroke, the fluid in the compression chamber 13 flows into the compression separation pipe 15 and moves to the storage chamber 17 through the compression solenoid valve 80, and a part of the fluid moves to the rebound chamber 14 through the bypass flow path of the piston valve.

[0011] exist Figure 4 and Figure 5 During the rebound stroke, the fluid in the rebound chamber 14 flows into the rebound separation tube 16, passes through the rebound solenoid valve 90 and the connecting hole 103a of the connecting part 103 and moves to the compression chamber 13 through the compression solenoid valve 80, and a part of the fluid moves to the compression chamber 13 through the bypass flow path of the piston valve.

[0012] However, in the conventional electronically controlled shock absorber equipped with dual solenoid valves, since the two solenoid valves 80 and 90 are arranged in series in the axial direction of the shock absorber, there is a problem that it is difficult to secure a mounting space.

[0013] In particular, in vehicles that use air springs, it is more difficult to use a dual solenoid valve due to interference with the air springs.

[0014] Prior Art Literature

[0015] Patent Literature

[0016] Patent Document 1: Korean Patent Publication No. 10-2023-0068294 (Publication Date: May 17, 2023) Summary of the invention

[0017] Problem that the invention aims to solve

[0018] The present invention is proposed to solve the above-mentioned problems of the prior art, and its object is to provide a new arrangement structure of a dual solenoid valve, which can improve the installation freedom of an electronically controlled shock absorber suitable for the dual solenoid valve.

[0019] Means used to solve problems

[0020] In order to solve the above problems, an electronically controlled shock absorber with a solenoid valve according to an embodiment of the present invention may include: a cylinder formed by an internal and external double structure, whose internal space is divided into a compression chamber and a rebound chamber, a storage chamber is formed in the external space, a compression solenoid valve installed on the outside of the cylinder, and a rebound solenoid valve installed on the outside of the cylinder; the compression solenoid valve and the rebound solenoid valve are arranged at a predetermined interval from each other in the circumferential direction with the axis of the cylinder as the center.

[0021] In addition, the compression solenoid valve and the rebound solenoid valve may be located at the same height in the axial direction of the cylinder.

[0022] In addition, the compression solenoid valve and the rebound solenoid valve may be arranged side by side with each other.

[0023] In addition, the compression solenoid valve may be directly connected to the cylinder, and the rebound solenoid valve may be connected to the cylinder via a rebound tube.

[0024] In addition, the cylinder may include a base shell located at the outermost side and an inner tube located at the innermost side, an upper rebound chamber and a lower compression chamber are formed inside the inner tube, a rebound separation tube is formed at the upper part and a compression separation tube is formed at the lower part between the inner tube and the base shell, the compression solenoid valve can be connected to the compression separation tube in the cylinder, and the rebound solenoid valve can be connected to the rebound separation tube in the cylinder through the rebound tube.

[0025] In addition, one end of the rebound tube may be connected to one end of the rebound valve housing of the rebound solenoid valve.

[0026] In addition, the other end of the rebound tube facing the rebound separation tube may be connected to the rebound port.

[0027] In addition, the rebound port may be connected to the rebound separation tube.

[0028] In addition, the rebound tube and the rebound port may be connected by a connector, and the connector surrounds the outer circumference of the portion where the rebound tube and the rebound port contact each other.

[0029] In addition, the compression solenoid valve and the rebound solenoid valve may be fixed by a screw block.

[0030] In addition, the rebound tube may be connected to the rebound valve housing via the spiral block.

[0031] In addition, the outer circumference of the connector and the rebound tube may be surrounded by a cover.

[0032] In addition, according to another embodiment of the present invention, an electronically controlled shock absorber with a solenoid valve may include: a cylinder formed by an internal and external double structure, whose internal space is divided into a compression chamber and a rebound chamber, a storage chamber is formed in the external space, a compression solenoid valve installed on the outside of the cylinder, and a rebound solenoid valve installed on the outside of the cylinder; the compression solenoid valve and the rebound solenoid valve are located at the same height in the axial direction of the cylinder.

[0033] In addition, during the compression stroke, the fluid in the compression chamber can flow into the compression separation tube.

[0034] In addition, the fluid flowing into the compression separation pipe may flow into the compression solenoid valve through the compression port, and then be discharged and moved to the storage chamber.

[0035] In addition, during the rebound stroke, the fluid in the rebound chamber can flow into the rebound separation tube.

[0036] In addition, the fluid flowing into the rebound separation pipe can flow into the rebound solenoid valve via the rebound port and through the rebound pipe.

[0037] In addition, the fluid that has flowed into the rebound solenoid valve may be discharged from the rebound solenoid valve and may flow into the compression solenoid valve via a communication hole inside a connection portion connecting the compression solenoid valve and the rebound solenoid valve.

[0038] In addition, the fluid flowing into the compression solenoid valve may be discharged and moved into the compression chamber.

[0039] Effects of the Invention

[0040] According to the electronically controlled shock absorber with dual solenoid valves according to the present invention constructed as described above, the following effects are achieved: since the dual solenoid valves are arranged at the same height in the circumferential direction, interference with other components during installation can be avoided, thereby improving the degree of freedom in installation.

[0041] In addition, there is an effect that the dual solenoid valve can be applied even to a vehicle model to which an air suspension is applied without causing interference with the air suspension located above the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The figure schematically shows an electronically controlled shock absorber to which a conventional dual solenoid valve is applied.

[0043] Figure 2 and Figure 3 This is a diagram showing the flow of fluid during the compression stroke in an electronically controlled shock absorber to which a conventional dual solenoid valve is applied.

[0044] Figure 4 and Figure 5 This is a diagram showing the flow of fluid during the rebound stroke in an electronically controlled shock absorber to which a conventional dual solenoid valve is applied.

[0045] Figure 6 The figure shows an electronically controlled shock absorber to which the arrangement structure of the dual solenoid valves of the present invention is applied.

[0046] Figure 7 It is shown Figure 6 A partial enlarged view of the arrangement structure of the dual solenoid valve.

[0047] Figure 8 and Fig. 9 It is a diagram showing a structure in which a rebound solenoid valve and a rebound separation pipe are connected in the electronically controlled shock absorber of the present invention.

[0048] Fig.10 It is a diagram showing the flow of fluid during the compression stroke in the electronically controlled shock absorber of the present invention.

[0049] Fig.11 It is a diagram showing the flow of fluid during the rebound stroke in the electronically controlled shock absorber of the present invention.

[0050] Description of Reference Numerals

[0051] 110: cylinder barrel; 111: base shell; 112: inner tube; 113: compression chamber; 115: compression separation tube; 116: rebound separation tube; 117: storage chamber; 130: piston rod; 150: spiral block; 180: compression solenoid valve; 182: compression port; 190: rebound solenoid valve; 191: rebound valve housing; 192: rebound port; 195: rebound tube; 196: connector; 197: cover; 200: connection part; 200a: communication hole DETAILED DESCRIPTION

[0052] Below, refer to Figures 6 to 11 , an electronically controlled shock absorber using a dual solenoid valve arrangement structure applicable to the present invention is described in detail.

[0053] Figure 6 and Figure 7 An embodiment of an electronically controlled shock absorber to which the arrangement structure of the dual solenoid valves of the present invention is applied is shown.

[0054] The electronically controlled shock absorber according to an embodiment of the present invention includes a cylinder 110 , a piston valve (not shown), a piston rod 130 , a body valve (not shown), a compression solenoid valve 180 , and a rebound solenoid valve 190 .

[0055] The compression solenoid valve 180 and the rebound solenoid valve 190 are arranged at a predetermined interval in the circumferential direction around the axis of the shock absorber, rather than being arranged in series with each other in the axial direction of the shock absorber cylinder 110. In other words, the compression solenoid valve 180 and the rebound solenoid valve 190 are arranged at the same height.

[0056] As described above, since the dual solenoid valves are arranged at the same height in the circumferential direction, interference with other components during installation can be avoided, thereby increasing the degree of freedom in installation. In particular, even in a vehicle model that uses air springs, the dual solenoid valves can be used without interfering with the air suspension located above the valves.

[0057] Preferably, the compression solenoid valve 180 and the rebound solenoid valve 190 may be arranged side by side with each other. In this case, the compression solenoid valve 180 and the rebound solenoid valve 190 are fixed by a screw block 150 and arranged side by side at the same height with each other.

[0058] Similar to the conventional electronically controlled shock absorber using dual solenoid valves, the compression solenoid valve 180 is connected to the compression separation pipe 115 (see Fig.10 ).

[0059] However, the rebound solenoid valve 190 is located at the same height as the compression solenoid valve 180 and cannot be directly connected to the rebound separation pipe 116 located above it. Therefore, the rebound solenoid valve 190 is connected to the rebound separation pipe 116 through a rebound pipe 195 (see Figures 6 to 9 ).

[0060] Figure 8 and Fig. 9 It is a diagram showing a structure in which a rebound solenoid valve and a rebound separation pipe are connected in the electronically controlled shock absorber of the present invention.

[0061] Below, refer to Figure 8 and Fig. 9 , the structure of connecting the rebound solenoid valve 190 to the rebound separation pipe 116 is described in detail.

[0062] The cylinder 110 includes a base shell 111 located at the outermost side and an inner tube 112 located at the innermost side. Inside the inner tube 112, a rebound chamber is formed at the upper part and a compression chamber is formed at the lower part. Between the inner tube 112 and the base shell 111, a rebound separation tube 116 is located at the upper part and a compression separation tube 115 is located at the lower part (refer to Fig.10 ).

[0063] One end of a rebound tube 195 is connected to one end of a rebound valve housing 191 of the rebound solenoid valve 190 . The other end of the rebound tube 195 facing the rebound separation tube 116 is connected to a rebound port 192 . The rebound port 192 is connected to the rebound separation tube 116 .

[0064] The rebound tube 195 may be connected to the rebound valve housing 191 via a screw block 150 .

[0065] The rebound tube 195 and the rebound opening 192 are connected by a connector 196 , and the connector 196 surrounds the outer circumference of the contacting portion of the rebound tube 195 and the rebound opening 192 . The outer circumference of the connector 196 and the rebound tube 195 is surrounded by a cover 197 .

[0066] Fig.10 FIG. 2 shows the flow of fluid during the compression stroke in the electronically controlled shock absorber of the present invention. Fig.11 Shows the flow of fluid during the rebound stroke.

[0067] Reference Fig.10During the compression stroke, the fluid in the compression chamber 113 flows into the compression separation tube 115, then flows into the compression solenoid valve 180 through the compression port 182, and then is discharged and moved to the storage chamber 117.

[0068] Reference Figure 8 and Fig. 9 During the rebound stroke, the fluid in the rebound chamber flows into the rebound separation pipe 116 , and then flows into the rebound solenoid valve 190 through the rebound port 192 and the rebound pipe 195 .

[0069] Then, refer to Fig.11 The fluid is discharged from the rebound solenoid valve 190 , passes through the communicating hole 103 a of the connecting portion 103 and moves into the compression chamber 113 through the compression solenoid valve 180 .

[0070] The above description is only an exemplary description of the technical idea of ​​the present invention, and a person of ordinary skill in the technical field to which the present invention belongs can make various modifications, changes and substitutions within the scope of the essential features of the present invention. Therefore, the present embodiment is not intended to limit the technical idea of ​​the present invention, but to illustrate it, and the scope of the technical idea of ​​the present invention is not limited by such an embodiment. The protection scope of the present invention should be interpreted according to the attached claims, and all technical ideas within the scope equivalent to them should be interpreted as included in the scope of rights of the present invention.

Claims

1. An electronically controlled shock absorber with dual solenoid valves, wherein: include: The cylinder is formed by a double structure of inner and outer parts. The inner space is divided into a compression chamber and a rebound chamber, and a storage chamber is formed in the outer space. a compression solenoid valve mounted on the outside of the cylinder, and A rebound solenoid valve is mounted outside the cylinder; The compression solenoid valve and the rebound solenoid valve are arranged at a predetermined interval from each other in a circumferential direction around the axis of the cylinder.

2. The electronically controlled shock absorber with dual solenoid valves according to claim 1, wherein: The compression solenoid valve and the rebound solenoid valve are located at the same height in the axial direction of the cylinder.

3. The electronically controlled shock absorber with dual solenoid valves according to claim 2, wherein: The compression solenoid valve and the rebound solenoid valve are arranged side by side with each other.

4. The electronically controlled shock absorber with dual solenoid valves according to claim 3, wherein: The compression solenoid valve is directly connected to the cylinder barrel, The rebound solenoid valve is connected to the cylinder through a rebound tube.

5. The electronically controlled shock absorber with dual solenoid valves according to claim 4, wherein: The cylinder includes a base shell located at the outermost side and an inner tube located at the innermost side, wherein an upper rebound chamber and a lower compression chamber are formed inside the inner tube, and a rebound separation tube is formed at the upper part and a compression separation tube is formed at the lower part between the inner tube and the base shell. The compression solenoid valve is connected to the compression separation pipe in the cylinder, The rebound solenoid valve is connected to the rebound separation tube in the cylinder through the rebound tube.

6. The electronically controlled shock absorber with dual solenoid valves according to claim 5, wherein: One end of the rebound tube is connected to one end of a rebound valve housing of the rebound solenoid valve.

7. The electronically controlled shock absorber with dual solenoid valves according to claim 6, wherein: The other end of the rebound tube facing the rebound separation tube is connected to the rebound port.

8. The electronically controlled shock absorber with dual solenoid valves according to claim 7, wherein: The rebound port is connected to the rebound separation tube.

9. The electronically controlled shock absorber with dual solenoid valves according to claim 8, wherein: The rebound tube and the rebound port are connected by a connector, and the connector surrounds the outer circumference of the portion where the rebound tube and the rebound port contact each other.

10. The electronically controlled shock absorber with dual solenoid valves according to claim 9, wherein: The compression solenoid valve and the rebound solenoid valve are fixed by a screw block.

11. The electronically controlled shock absorber with dual solenoid valves according to claim 10, wherein: The rebound tube is connected to the rebound valve housing through the spiral block.

12. The electronically controlled shock absorber with dual solenoid valves according to claim 11, wherein: The outer peripheries of the connector and the rebound tube are surrounded by a cover.

13. An electronically controlled shock absorber having a dual solenoid valve, wherein: include: The cylinder is formed by a double structure of inner and outer parts. The inner space is divided into a compression chamber and a rebound chamber, and a storage chamber is formed in the outer space. a compression solenoid valve mounted on the outside of the cylinder, and A rebound solenoid valve is mounted outside the cylinder; The compression solenoid valve and the rebound solenoid valve are located at the same height in the axial direction of the cylinder.

14. The electronically controlled shock absorber with dual solenoid valves according to claim 13, wherein: The compression solenoid valve is directly connected to the cylinder barrel, The rebound solenoid valve is connected to the cylinder through a rebound tube.

15. The electronically controlled shock absorber with dual solenoid valves according to claim 14, wherein: The cylinder includes a base shell located at the outermost side and an inner tube located at the innermost side, an upper rebound chamber and a lower compression chamber are formed inside the inner tube, and a rebound separation tube is formed at the upper part and a compression separation tube is formed at the lower part between the inner tube and the base shell; The compression solenoid valve is connected to the compression separation tube in the cylinder; The rebound solenoid valve is connected to the rebound separation tube in the cylinder through the rebound tube.

16. The electronically controlled shock absorber with dual solenoid valves according to claim 15, wherein: During the compression stroke, the fluid in the compression chamber flows into the compression separation tube.

17. The electronically controlled shock absorber with dual solenoid valves according to claim 16, wherein: The fluid flowing into the compression separation pipe flows into the compression solenoid valve through the compression port, and is then discharged and moved to the storage chamber.

18. The electronically controlled shock absorber with dual solenoid valves according to claim 15, wherein: During the rebound stroke, the fluid in the rebound chamber flows into the rebound separation tube.

19. The electronically controlled shock absorber with dual solenoid valves according to claim 18, wherein: The fluid flowing into the rebound separation pipe flows into the rebound solenoid valve via the rebound port and through the rebound pipe.

20. The electronically controlled shock absorber with dual solenoid valves according to claim 19, wherein: The fluid that has flowed into the rebound solenoid valve is discharged from the rebound solenoid valve and flows into the compression solenoid valve via a communication hole inside a connection portion connecting the compression solenoid valve and the rebound solenoid valve.

21. The electronically controlled shock absorber with dual solenoid valves according to claim 20, wherein: The fluid flowing into the compression solenoid valve is discharged and moves into the compression chamber.

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