Intermediate cylinder assembly and double-valve electric control shock absorber

Abstract

The utility model discloses a middle cylinder assembly which comprises a middle cylinder body and a sealing piece, the sealing piece is connected into the middle cylinder body, and at least one protruding piece is arranged on each of the two sides of the sealing piece in the axial direction. With the protruding piece and the sealing piece as the boundary, a cavity between the middle cylinder body and the working cylinder body is divided into an upper part and a lower part, and electromagnetic valve connecting holes are formed in the side walls of the upper part and the lower part of the middle cylinder body. The utility model further discloses a double-valve electric control shock absorber. The intermediate cylinder has the advantages that the intermediate cylinder body is divided into the double-cavity structure, after the intermediate cylinder is used for a shock absorber, oil liquid of recovery stroke and oil liquid of compression stroke circulate in the separated double cavities respectively, an oil way is shortened, and the response time of an electromagnetic valve to working conditions is prolonged.

Description

Technical Field

[0001] The utility model relates to an automobile shock absorber, in particular to an intermediate cylinder structure of a double-valve electronically controlled shock absorber. Background Art

[0002] An electronically controlled shock absorber, hereinafter referred to as a shock absorber, mainly controls the magnitude of the damping force generated under different strokes through an electromagnetic valve to meet the shock absorption requirements under different road conditions;

[0003] The shock absorber generally adopts a single electromagnetic valve structure. When the piston rod drives the oil to move, the oil in the upper chamber of the working cylinder will enter the intermediate cylinder chamber through the through hole at the upper end and then flow into the electromagnetic valve for regulation. However, in a single electromagnetic valve shock absorber, the flow path of the oil to the electromagnetic valve is fixed, and it needs to flow through the same long oil path during both the recovery stroke and the compression stroke, which will result in a slow response of the damping force of the shock absorber.

[0004] At the same time, since the regulation range of the damping force by a single electromagnetic valve is relatively limited, generally, a part of the maximum value during the compression stroke is sacrificed to meet the damping force required during the recovery stroke, which results in the inability to provide a large damping force under the working conditions of the compression stroke, thus affecting the user experience.

[0005] At present, although there are double-valve electronically controlled shock absorbers that can avoid the above situation, the intermediate cylinders of these double-valve electronically controlled shock absorbers on the market that form a double chamber for recovery and compression generally adopt a two-section or three-section splicing type or an upper and lower independent separation type intermediate cylinder. Although these solutions can achieve the double-chamber effect, they all change the integrity of the intermediate cylinder, which will increase the risk of failure during processing and use.

[0006] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0007] The technical problem to be solved by the present utility model is: how to solve the problem that the damping force response of the current shock absorber is not fast enough.

[0008] The present utility model solves the above technical problems by the following technical means:

[0009] An intermediate cylinder assembly, including an intermediate cylinder body and a seal. The seal is connected inside the intermediate cylinder body, and at least one convex member is provided on both sides of the seal along the axial direction. Taking the convex member and the seal as the boundary, the cavity between the intermediate cylinder body and the working cylinder body is divided into upper and lower parts, and electromagnetic valve connection holes are opened on the side walls of the intermediate cylinder body in the upper and lower parts.

[0010] In the present utility model, the seal and the protruding member divide the intermediate cylinder body into a double-chamber structure. After being used in a shock absorber, the separated double chambers respectively circulate the oil for the rebound and compression strokes, shortening the oil circuit and improving the response time of the solenoid valve to the working conditions.

[0011] Preferably, the protruding member is an annular sleeve, and the outer wall of the annular sleeve is connected to the inner wall of the intermediate cylinder body.

[0012] Preferably, the intermediate cylinder body is recessed inward from the outside to form a pressing groove, the middle of the outer ring of the annular sleeve has an annular groove, and the pressing groove is connected to the groove.

[0013] The intermediate cylinder body and the annular sleeve are connected by riveting, and there is no need to cut and seal the upper and lower pipes in the traditional way, reducing the processing procedures and the possibility of failure.

[0014] Preferably, the cross section of the pressing groove is one or a combination of a square, a trapezoid, a triangle, etc., and the cross section of the groove is adapted to the cross section of the pressing groove.

[0015] Preferably, the pressing groove and the groove are fixedly connected by a riveting method.

[0016] Preferably, the inner diameter of the annular sleeve is larger than the inner diameter of the seal to ensure the sealing requirement.

[0017] Preferably, the protruding member is a protruding structure formed by the intermediate cylinder body being recessed inward from the outside. A sealing groove for installing the seal is formed between the two protruding structures, and the seal is connected in the sealing groove.

[0018] Preferably, the seal is an O-ring.

[0019] A double-valve electronically controlled shock absorber includes a working cylinder assembly, an intermediate cylinder assembly, a compression solenoid valve, and a rebound solenoid valve. The working cylinder assembly and the intermediate cylinder assembly are coaxial, the working cylinder assembly is connected inside the intermediate cylinder assembly, and the two solenoid valve connection holes of the intermediate cylinder body are respectively connected to the compression solenoid valve and the rebound solenoid valve.

[0020] During the compression stroke, the rebound solenoid valve is closed, and part of the oil flows from the lower chamber of the working cylinder into the lower cylinder of the intermediate cylinder, and then flows through the compression solenoid valve for regulation; during the rebound stroke, the compression solenoid valve is closed, and part of the oil flows from the upper chamber of the working cylinder into the upper cylinder of the intermediate cylinder, and then flows through the rebound solenoid valve for adjustment.

[0021] In the present utility model, the double-chamber design enables the compression solenoid valve and the rebound solenoid valve to fully regulate the corresponding working conditions without considering the influence on the other stroke, improving the coverage range of the shock absorber damping force regulation.

[0022] The advantages of the present utility model are as follows:

[0023] In the utility model, the seal and the convex part divide the middle cylinder body into a double-chamber structure. After being used in a shock absorber, the separated double chambers respectively circulate the oil fluid for the rebound and compression strokes, shortening the oil path and improving the response time of the solenoid valve to the working conditions;

[0024] The middle cylinder body and the annular sleeve are connected by riveting and pressing, eliminating the need to cut and seal the upper and lower pipes in the traditional way, reducing the processing procedures and the possibility of failure;

[0025] In the utility model, the double-chamber design enables the compression solenoid valve and the rebound solenoid valve to fully control the corresponding working conditions without considering the influence on the other stroke, improving the coverage range of the shock absorber damping force control. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the middle cylinder assembly in the first embodiment of the utility model;

[0027] Figure 2 is a schematic structural diagram of the middle cylinder assembly in the first embodiment of the utility model (perspective effect);

[0028] Figure 3 is a cross-sectional view of the middle cylinder assembly in the first embodiment of the utility model;

[0029] Figure 4 is Figure 3 an enlarged view of part A of

[0030] Figure 5 is a cross-sectional view of the middle cylinder body in the second embodiment of the utility model;

[0031] Figure 6 is a schematic diagram of the oil path principle of the double-valve electronically controlled shock absorber in the embodiment of the utility model Figure 1 ;

[0032] Figure 7 is a schematic diagram of the oil path principle of the double-valve electronically controlled shock absorber in the embodiment of the utility model Figure 2 ;

[0033] Reference Numerals in the Drawings:

[0034] 1. Middle cylinder assembly; 11. Middle cylinder body; 12. Seal; 13. Solenoid valve connection hole; 14. Annular sleeve; 15. Convex structure; 16. Sealing groove;

[0035] 2. Working cylinder assembly; 21. Working cylinder body; 22. Piston valve; 23. Piston rod;

[0036] 3. Rebound solenoid valve; 4. Compression solenoid valve. Detailed Embodiment

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] Embodiment 1:

[0039] As Figure 1 、 Figure 2 shown, the intermediate cylinder assembly 1 includes an intermediate cylinder body 11 and a seal 12. The seal 12 is connected inside the intermediate cylinder body 11, and at least one protruding member is provided on each of the two axial sides of the seal 12. Taking the protruding member and the seal 12 as the boundaries, the cavity between the intermediate cylinder body 11 and the working cylinder body 21 is divided into upper and lower parts, and solenoid valve connection holes 13 are opened on the side walls of the intermediate cylinder body 11 in the upper and lower parts.

[0040] In this embodiment, the protruding member is an annular sleeve 14, and the outer wall of the annular sleeve 14 is connected to the inner wall of the intermediate cylinder body 11. Specifically, a pressing groove is formed by the intermediate cylinder body 11 recessing from the outside to the inside, and a circular groove is provided in the middle of the outer circle of the annular sleeve 14, and the pressing groove is connected to the groove.

[0041] As Figure 3 、 Figure 4 shown, in this embodiment, the intermediate cylinder body 11 and the annular sleeve 14 are connected by riveting. A positioning tooling is used in the intermediate cylinder body 11 to determine the position of the annular sleeve 14 located below. The intermediate cylinder body 11 is deformed by riveting, and a pressing groove is formed by the intermediate cylinder body 11 recessing inward. The pressing groove is inserted into the groove of the annular sleeve 14 for fixation. Then, the seal 12 is placed on the plane of the annular sleeve 14 located below, and the annular sleeve 14 located above is placed from this end using the positioning tooling, and the same riveting method is used for fixation.

[0042] The intermediate cylinder body 11 and the annular sleeve 14 are connected by riveting, eliminating the need to cut and seal the upper and lower pipes in the traditional way, reducing the processing procedures and the possibility of failure.

[0043] The cross-section of the pressing groove is one or a combination of a square, a trapezoid, a triangle, etc., and the cross-section of the groove is adapted to the cross-section of the pressing groove. The meaning of "adapted" is that the groove can achieve a tight connection with the pressing groove. Even if there are some differences between the cross-section of the pressing groove and the cross-section of the groove, such as the pressing groove is trapezoidal and the groove is rectangular, it is still possible to achieve a tight connection after riveting between the pressing groove and the groove.

[0044] In this embodiment, the annular sleeve 14 is used to fix the seal 12. The seal 12 is an O-ring, and the inner diameter of the annular sleeve 14 is larger than that of the seal 12, so as to achieve a sealed connection between the seal 12 and the working cylinder body 21.

[0045] In this embodiment, the seal 12 and the annular sleeve 14 divide the intermediate cylinder body 11 into a double-chamber structure. After being used in the shock absorber, the separated double chambers respectively circulate the oil for the rebound and compression strokes, shortening the oil circuit and improving the response time of the solenoid valve to the working conditions.

[0046] Embodiment Two:

[0047] As Figure 5 shown, the difference between this embodiment and Embodiment One is that in this embodiment, the protruding part is no longer the annular sleeve 14, and the annular sleeve 14 is no longer used in this embodiment. The protruding part is a protruding structure 15 formed by the inward depression of the intermediate cylinder body 11 from the outside to the inside. A sealing groove 16 for installing the seal 12 is formed between the two protruding structures 15, and the seal 12 is connected in the sealing groove 16.

[0048] In this embodiment, the protrusions 15 at the upper and lower parts of the seal 12 can still form a structure for fixing the seal 12. Therefore, in principle, as long as an O-ring fixing point is formed and a structure with a double chamber for the solenoid valves to respond respectively is formed, it can be regarded as a variation of this solution.

[0049] As Figure 6 、 Figure 7 shown, the double-valve electronically controlled shock absorber includes a working cylinder assembly 2, an intermediate cylinder assembly 1 adopting the above Embodiment One or Embodiment Two, a compression solenoid valve 4, and a rebound solenoid valve 3. The working cylinder assembly 2 is coaxial with the intermediate cylinder assembly 1, the working cylinder assembly 2 is connected inside the intermediate cylinder assembly 1, and the two solenoid valve connection holes 13 of the intermediate cylinder body 11 are respectively connected to the compression solenoid valve 4 and the rebound solenoid valve 3.

[0050] Among them, the working cylinder assembly 2 includes a working cylinder body 21, a piston valve 22, and a piston rod 23; there are also small holes in the upper and lower parts of the working cylinder body 21. The piston valve 22 is connected to the piston rod 23, and the piston valve 22 serves as a boundary so that the upper part of the working cylinder body 21 is the upper working cylinder chamber, and the lower part of the working cylinder body 21 is the lower working cylinder chamber.

[0051] As Figure 6 shown, during the compression stroke, the rebound solenoid valve 3 is closed, and part of the oil flows from the small hole in the lower working cylinder chamber into the lower cylinder of the intermediate cylinder body 11, and then flows through the compression solenoid valve 4 for regulation; as Figure 7 shown, during the rebound stroke, the compression solenoid valve 4 is closed, and part of the oil flows from the small hole in the upper working cylinder chamber into the upper chamber of the intermediate cylinder body 11, and then flows through the rebound solenoid valve 3 for adjustment.

[0052] In this embodiment, the double-chamber design enables the compression solenoid valve 4 and the restoration solenoid valve 3 to fully control the corresponding working conditions without having to consider the impact on the other stroke, thereby improving the coverage range of the damping force control of the shock absorber.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Intermediate cylinder assembly, characterized in that: It includes an intermediate cylinder body and a sealing member, wherein the sealing member is connected inside the intermediate cylinder body, and at least one protrusion is respectively arranged on both sides of the sealing member along the axial direction; with the protrusion and the sealing member as boundaries, the cavity between the intermediate cylinder body and the working cylinder body is divided into an upper and lower part, and electromagnetic valve connection holes are provided on the side walls of the intermediate cylinder body of the upper and lower parts.

2. The intermediate cylinder assembly according to claim 1, characterized in that: The protruding member is an annular sleeve, and the outer wall of the annular sleeve is connected to the inner wall of the intermediate cylinder body.

3. The intermediate cylinder assembly according to claim 2, characterized in that: The intermediate cylinder body is recessed from outside to inside to form a pressing groove, and the middle part of the outer ring of the annular sleeve has an annular groove, and the pressing groove is connected to the groove.

4. The intermediate cylinder assembly according to claim 3, characterized in that: The cross section of the pressing groove is one or a combination of square, trapezoidal, and triangular, and the cross section of the groove is adapted to the cross section of the pressing groove.

5. The intermediate cylinder assembly according to claim 3, characterized in that: The pressing groove and the groove are fixedly connected by riveting.

6. The intermediate cylinder assembly according to claim 2, characterized in that: The inner diameter of the annular sleeve is greater than the inner diameter of the sealing element.

7. The intermediate cylinder assembly according to claim 1, characterized in that: The protrusion is a protrusion structure formed by the intermediate cylinder body being recessed from the outside to the inside, and a sealing groove for installing a sealing member is formed between two protrusion structures, and the sealing member is connected in the sealing groove.

8. The intermediate cylinder assembly according to claim 1, characterized in that: The sealing element is an O-ring.

9. Double valve electronically controlled shock absorber, characterized in that: It includes a working cylinder assembly, an intermediate cylinder assembly according to any one of claims 1 to 8, a compression solenoid valve, and a restoration solenoid valve. The working cylinder assembly is coaxial with the intermediate cylinder assembly. The working cylinder assembly is connected to the inside of the intermediate cylinder assembly. The two solenoid valve connecting holes of the intermediate cylinder body are respectively connected to the compression solenoid valve and the restoration solenoid valve.

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