Electric control shock absorber

Abstract

The electronic control shock absorber comprises a piston assembly, an oil storage barrel, a middle cylinder, a working cylinder, an electromagnetic valve assembly and a passive valve system assembly, the piston assembly is arranged in the working cylinder, the outer side of the working cylinder is sequentially sleeved with the middle cylinder and the oil storage barrel, an inner cavity is formed between the middle cylinder and the working cylinder, and the electromagnetic valve assembly is arranged in the inner cavity. An outer cavity is formed between the middle cylinder and the oil storage barrel, and an electromagnetic valve assembly capable of communicating the inner cavity with the outer cavity is arranged on the oil storage barrel. The invention has the advantages that the use of electromagnetic valves is reduced, the manufacturing cost of the product is greatly reduced, one electromagnetic valve is reduced, the overall weight of the product is further reduced, and the light weight is realized; and in addition, only one oil channel is needed in use of a single valve, compared with double-valve double-control, one electromagnetic valve oil channel is omitted, only the accuracy of the coaxiality of one position needs to be guaranteed, the machining cost is reduced, and the machining difficulty is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, and in particular to an electronically controlled shock absorber. Background Art

[0002] The electronically controlled shock absorber mainly uses electromagnetic valves to adjust the damping force generated under different strokes to meet the vibration reduction requirements under different road conditions. Currently, the common electronically controlled shock absorbers are basically single-valve single-control or double-valve double-control structures. The single-valve single-control is a solenoid valve that controls an entire cavity between the intermediate cylinder and the working cylinder. The oil between the working cylinder and the intermediate cylinder enters the electromagnetic valve and flows into the cavity between the oil storage cylinder and the intermediate cylinder through the side channel of the electromagnetic valve. Because the single valve controls the entire cavity oil, the response speed is lower than that of the double-valve double-control. The common double-valve double-control of the double-control shock absorber is to introduce two electromagnetic valves to control the damping force during recovery and compression respectively, so that the response speed is improved. For example, the Chinese utility model document with publication number CN221857396U discloses a double-valve shock absorber, and the double-valve double-control technology is disclosed in the patent. However, due to the two electromagnetic valves, the product cost is greatly increased. In addition, because the dual-valve dual-control requires two channels for flowing into the solenoid valve, and the coaxiality requirements of the two channels and the positional accuracy requirements between the two solenoid valve connection structures are high, the processing cost is high. Summary of the invention

[0003] The technical problem to be solved by the present invention is how to reduce the cost of the electronically controlled shock absorber.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] An electronically controlled shock absorber comprises a piston assembly, an oil storage cylinder, an intermediate cylinder, a working cylinder, a solenoid valve assembly and a passive valve system assembly, wherein the piston assembly is arranged in the working cylinder, the intermediate cylinder and the oil storage cylinder are sequentially sleeved on the outer side of the working cylinder, an inner cavity is formed between the intermediate cylinder and the working cylinder, an outer cavity is formed between the intermediate cylinder and the oil storage cylinder, and the oil storage cylinder is provided with a solenoid valve assembly capable of connecting the inner cavity and the outer cavity;

[0006] The intermediate cylinder comprises an upper cylinder body, a lower cylinder body and a connecting pipe, wherein the upper cylinder body and the lower cylinder body are connected by the connecting pipe, and the inner walls at both ends of the connecting pipe are respectively provided with a first step portion and a second step portion which are closely attached to the upper cylinder body and the lower cylinder body, and the passive valve system component is arranged between the connecting pipe and the working cylinder, and divides the inner cavity into a first cavity, an intermediate cavity and a second cavity;

[0007] The passive valve system component includes an upper retaining ring, a lower retaining ring and a spring, and the upper retaining ring, the lower retaining ring and the spring are all sleeved on the working cylinder. The inner wall of the upper retaining ring is close to the outer wall of the working cylinder, and the top surface is close to the first step portion. The inner wall of the lower retaining ring is close to the outer wall of the working cylinder, and the bottom surface is close to the second step portion. The spring is connected between the upper retaining ring and the lower retaining ring.

[0008] Through the coordinated arrangement of the upper retaining ring, the lower retaining ring, the spring and the connecting pipe, the damping force of the two strokes of restoration and compression can be controlled by one solenoid valve. Compared with the existing double-valve double-control, the use of solenoid valves is reduced, which greatly reduces the manufacturing cost of the product. The reduction of one solenoid valve also further reduces the overall weight of the product, achieving lightweight. Moreover, the use of a single valve only requires one oil channel. Compared with the double-valve double-control, one solenoid valve oil channel is reduced, and only the coaxiality accuracy of one position needs to be guaranteed, which reduces the processing cost and the processing difficulty.

[0009] Preferably, the connecting pipe includes an upper connecting pipe and a lower connecting pipe, and the upper connecting pipe and the lower connecting pipe are coaxially interference fit together, the first step portion is arranged on the inner wall of the upper connecting pipe, and the second step portion is arranged on the inner wall of the lower connecting pipe, and the opposite ends of the first step portion and the second step portion are respectively interference fit with the intermediate cylinder.

[0010] Preferably, the inner walls of the upper retaining ring and the lower retaining ring are both interference fit with the outer wall of the working cylinder.

[0011] Preferably, the spring is always in a compressed state.

[0012] Preferably, the solenoid valve assembly includes a valve seat, a solenoid valve, and a linking ring. The valve seat is fixed to the outer wall of the oil storage cylinder, a solenoid valve is arranged in the valve seat, and the linking ring is pressed against the connecting pipe through the solenoid valve, so that the intermediate cavity is connected to the solenoid valve through the linking ring.

[0013] Preferably, a first through hole is formed on the connecting pipe, and the solenoid valve is connected to the first through hole via a linking ring.

[0014] Preferably, a second through hole is formed in the oil storage cylinder, and the valve seat is fixed on the outer wall of the oil storage cylinder at the second through hole.

[0015] Preferably, the end surface of the link ring clamping connecting pipe is also sleeved with an O-ring.

[0016] Preferably, the link ring is in a bell-mouth shape.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Through the coordinated arrangement of the upper retaining ring, the lower retaining ring, the spring and the connecting pipe, the damping force of the two strokes of restoration and compression can be controlled by one solenoid valve. Compared with the existing double-valve double-control, the use of solenoid valves is reduced, which greatly reduces the manufacturing cost of the product. The reduction of one solenoid valve also further reduces the overall weight of the product, achieving lightweight. Moreover, the use of a single valve only requires one oil channel. Compared with the double-valve double-control, one solenoid valve oil channel is reduced, and only the coaxiality accuracy of one position needs to be guaranteed, which reduces the processing cost and the processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of a local structure of an embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of an oil storage cylinder according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings of the specification.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0025] See also Figure 1 to Figure 2The present embodiment discloses an electronically controlled shock absorber, comprising a piston assembly 1, an oil storage cylinder 2, an intermediate cylinder 3, a working cylinder 4, a solenoid valve assembly 5 and a passive valve system assembly 6, wherein the piston assembly 1 is arranged in the working cylinder 4, the intermediate cylinder 3 and the oil storage cylinder 2 are sequentially sleeved on the outer side of the working cylinder 4, an inner cavity is formed between the intermediate cylinder 3 and the working cylinder 4, an outer cavity 201 is formed between the intermediate cylinder 3 and the oil storage cylinder 2, and the oil storage cylinder 2 is provided with a solenoid valve assembly 5 capable of connecting the inner cavity and the outer cavity 201.

[0026] The intermediate cylinder 3 includes an upper cylinder body 31, a lower cylinder body 32 and a connecting pipe 33. The upper cylinder body 31 and the lower cylinder body 32 are connected by the connecting pipe 33. The passive valve system component 6 is arranged between the connecting pipe 33 and the working cylinder 3, and divides the inner cavity into a first cavity 301, an intermediate cavity 302 and a second cavity 303.

[0027] The connecting tube 33 includes an upper connecting tube 331 and a lower connecting tube 332, which are coaxially interference fit with each other. A first step portion 3311 is provided on the inner wall of the upper connecting tube 331, and a second step portion 3321 is provided on the inner wall of the lower connecting tube 332. The ends opposite to the first step portion 3311 and the second step portion 3321 are respectively interference fit with the end faces of the upper cylinder body 31 and the lower cylinder body 32.

[0028] The solenoid valve assembly 5 includes a solenoid valve 51, a linking ring 52 and a valve seat 53. The valve seat 53 is fixed to the outer wall of the oil storage cylinder 2. The valve seat 53 is internally threadedly connected to the solenoid valve 51. The linking ring 52 is pressed against the upper connecting pipe 331 through the solenoid valve 51. The upper connecting pipe 331 is provided with a first through hole (not marked in the figure), so that the intermediate cavity 302 is connected to the solenoid valve 51 through the linking ring 52.

[0029] For details, see Figure 3 The oil storage cylinder 2 is provided with a second through hole 21, and the valve seat 53 is welded and fixed on the outer wall of the oil storage cylinder 2 at the second through hole 21. The link ring 52 is in a bell-mouth shape, with a large diameter at the upper end and a small diameter at the lower end. The solenoid valve 51 abuts against the large diameter end, and the small diameter end of the link ring 52 is provided with an outer wall of the upper connecting pipe 331 abutting against the first through hole, so that the small diameter end of the link ring 52 is sealed and connected with the first through hole, so that the intermediate cavity 302 is connected with the solenoid valve 51 through the link ring 52. It should be noted that the link ring 52 is not limited to the bell-mouth shape, and other shapes are also possible, such as cylindrical.

[0030] Furthermore, an O-ring (not marked in the figure) is sleeved on the small-diameter end face of the link ring 52, so that the small-diameter end face of the link ring 52 is sealed and connected to the outer wall of the upper connecting pipe 331. In this embodiment, the O-ring is pressed against the outer wall of the connecting pipe 331, but the sealing is not limited to the pressing method, and an insertion sealing method can also be adopted.

[0031] The passive valve system component 6 includes an upper retaining ring 61, a lower retaining ring 62 and a spring 63, and the upper retaining ring 61, the lower retaining ring 62 and the spring 63 are all sleeved on the outer wall of the working cylinder 4, the inner wall of the upper retaining ring 61 is tightly fitted with the outer wall of the working cylinder 4, the top surface of the upper retaining ring 61 is tightly against the first step portion 3311, the inner wall of the lower retaining ring 62 is tightly fitted with the outer wall of the working cylinder 4, and the bottom surface of the lower retaining ring 62 is tightly against the second step portion 3321, and the spring 63 which is always in a compressed state is connected between the upper retaining ring 61 and the lower retaining ring 62.

[0032] The working principle of this embodiment is as follows: Figure 1 and Figure 2 When the piston assembly 1 moves downward, the shock absorber compresses the stroke, the oil is squeezed from the second cavity 303 at the bottom of the inner cavity, the oil pressure increases, and the lower retaining ring 62 is pushed upward, and the upper retaining ring 61 is always tightly attached to the first step 3311, so that the bottom of the middle cavity 302 is unidirectionally conductive, and then the oil in the second cavity 303 at the bottom of the inner cavity enters the middle cavity 302, and then the oil enters the outer cavity 201 from the middle cavity 302 through the solenoid valve assembly 5. The oil can only enter the outer cavity 201 through the solenoid valve assembly 5 during the compression stroke of the shock absorber, so that the solenoid valve assembly 5 can realize independent and continuous regulation of the compression damping force.

[0033] When the piston assembly 1 moves upward, the shock absorber makes a restoring stroke, squeezing the oil from the first cavity 301 at the top of the inner cavity, increasing the oil pressure and pushing the upper retaining ring 61 downward, while the lower retaining ring 62 is always tightly attached to the second step 3321, so that the top of the middle cavity 302 is unidirectionally conductive, thereby allowing the oil in the first cavity 301 at the top of the inner cavity to enter the middle cavity 302, and then the oil enters the outer cavity 201 from the middle cavity 302 through the solenoid valve assembly 5. The oil can only enter the outer cavity 201 through the solenoid valve assembly 5 during the compression stroke of the shock absorber, thereby enabling the solenoid valve assembly 5 to independently and continuously regulate the restoring damping force.

[0034] In this embodiment, through the coordinated arrangement of the upper retaining ring 61, the lower retaining ring 62, the spring 63 and the connecting pipe 33, the damping force of the two strokes of restoration and compression can be controlled by one solenoid valve. Compared with the existing double-valve double-control, the use of solenoid valves is reduced, which greatly reduces the manufacturing cost of the product. In addition, by reducing one solenoid valve, the overall weight of the product is further reduced, thereby achieving lightweight. Moreover, the use of a single valve only requires one oil channel. Compared with the double-valve double-control, one solenoid valve oil channel is reduced, and only the coaxiality accuracy of one position needs to be ensured, thereby reducing the processing cost and the processing difficulty.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0036] The above-described embodiments merely represent implementation methods of the invention. The protection scope of the present invention is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An electronically controlled shock absorber, characterized in that: It comprises a piston assembly, an oil storage cylinder, an intermediate cylinder, a working cylinder, a solenoid valve assembly and a passive valve system assembly, wherein the piston assembly is arranged in the working cylinder, the intermediate cylinder and the oil storage cylinder are sequentially sleeved on the outer side of the working cylinder, an inner cavity is formed between the intermediate cylinder and the working cylinder, an outer cavity is formed between the intermediate cylinder and the oil storage cylinder, and the oil storage cylinder is provided with a solenoid valve assembly capable of connecting the inner cavity and the outer cavity; The intermediate cylinder comprises an upper cylinder body, a lower cylinder body and a connecting pipe, wherein the upper cylinder body and the lower cylinder body are connected by the connecting pipe, and the inner walls at both ends of the connecting pipe are respectively provided with a first step portion and a second step portion which are closely attached to the upper cylinder body and the lower cylinder body, and the passive valve system component is arranged between the connecting pipe and the working cylinder, and divides the inner cavity into a first cavity, an intermediate cavity and a second cavity; The passive valve system component includes an upper retaining ring, a lower retaining ring and a spring, and the upper retaining ring, the lower retaining ring and the spring are all sleeved on the working cylinder. The inner wall of the upper retaining ring is close to the outer wall of the working cylinder, and the top surface is close to the first step portion. The inner wall of the lower retaining ring is close to the outer wall of the working cylinder, and the bottom surface is close to the second step portion. The spring is connected between the upper retaining ring and the lower retaining ring.

2. An electronically controlled shock absorber according to claim 1, characterized in that: The connecting pipe includes an upper connecting pipe and a lower connecting pipe, and the upper connecting pipe and the lower connecting pipe are coaxially interference-fitted with each other. The first step portion is arranged on the inner wall of the upper connecting pipe, and the second step portion is arranged on the inner wall of the lower connecting pipe. The ends opposite to each other of the first step portion and the second step portion are respectively interference-fitted with the intermediate cylinder.

3. The electronically controlled shock absorber according to claim 1, characterized in that: The inner walls of the upper retaining ring and the lower retaining ring are both interference-fitted with the outer wall of the working cylinder.

4. The electronically controlled shock absorber according to claim 1, characterized in that: The spring is always in a compressed state.

5. The electronically controlled shock absorber according to claim 1, characterized in that: The solenoid valve assembly includes a valve seat, a solenoid valve, and a link ring. The valve seat is fixed to the outer wall of the oil storage cylinder. The solenoid valve is arranged in the valve seat. The link ring is pressed on the connecting pipe through the solenoid valve, so that the intermediate cavity is connected with the solenoid valve through the link ring.

6. The electronically controlled shock absorber according to claim 5, characterized in that: The connecting pipe is provided with a first through hole, and the solenoid valve is communicated with the first through hole via a linking ring.

7. The electronically controlled shock absorber according to claim 5, characterized in that: The oil storage cylinder is provided with a second through hole, and the valve seat is fixed on the outer wall of the oil storage cylinder at the second through hole.

8. The electronically controlled shock absorber according to claim 5, characterized in that: The end surface of the link ring clamping connecting pipe is also sleeved with an O-type sealing ring.

9. The electronically controlled shock absorber according to claim 5, characterized in that: The linking ring is in a trumpet shape.

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