Novel double-electromagnetic-valve shock absorber

Abstract

The invention provides a novel double-electromagnetic-valve shock absorber which comprises an oil storage cylinder, a middle cylinder, a working cylinder and a piston rod and further comprises a recovery valve assembly, a compression valve assembly, a recovery electromagnetic valve and a compression electromagnetic valve. The rebuilt valve assembly is connected to the lower end of the piston rod to divide the working cylinder into an upper cavity and a lower cavity; the compression valve assembly is arranged at the bottom end of the working cylinder to communicate the lower cavity with the oil storage cylinder; the restoring electromagnetic valve is connected to the outer side of the oil storage cylinder, and the upper cavity is communicated with the oil storage cylinder; the compression electromagnetic valve is arranged at the bottom of the oil storage cylinder to communicate the lower cavity with the oil storage cylinder; when the piston rod moves upwards, part of oil in the upper cavity flows into the oil storage cavity through the recovery electromagnetic valve, and part flows into the lower cavity through the recovery valve assembly. When the piston rod moves downwards, part of oil in the lower cavity flows into the oil storage cylinder through the compression electromagnetic valve, part flows into the oil storage cylinder through the compression valve assembly, and part flows into the upper cavity through the rebuilt valve. According to the novel double-electromagnetic-valve shock absorber, damping force adjustment in a large range can be achieved under the condition that the occupied chassis space is small.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, and in particular to a novel double-solenoid valve shock absorber. Background Art

[0002] Traditional automobile shock absorbers are mainly composed of springs and hydraulic shock absorbers with non-adjustable stiffness and damping. It is difficult to balance handling stability and ride comfort when adjusting the vehicle, so semi-active shock absorbers with adjustable damping have become the mainstream development trend. At present, the widely used damping adjustable shock absorbers are single solenoid valve controlled shock absorbers, which can achieve timely adjustment of damping characteristics based on road conditions, but due to its limited damping adjustment range, it cannot solve the pain point of the contradiction between handling stability and ride comfort.

[0003] In this regard, the prior art has come up with a dual-solenoid valve solution, which can use two solenoid valves, the restoring and compression, to control the adjustment of the restoring damping and compression damping force values ​​respectively, with a large damping adjustment bandwidth and a wide adjustable range. However, the existing dual-solenoid valve shock absorber requires two solenoid valves to be arranged outside the cylinder, which will increase the chassis space occupied by the shock absorber, is not conducive to the development of chassis components, and affects the arrangement of suspension guide mechanisms, elastic elements and other chassis structural parts. Moreover, a large number of avoidance structures are required for the peripheral parts of the shock absorber, which affects the strength of the structural parts. In the early development process, a large amount of motion verification, strength analysis, design verification and other work are also added, resulting in a long R&D cycle and high costs.

[0004] For example, patent CN 202322259025.0 discloses a dual-valve controlled semi-active shock absorber, which independently adjusts the restoring damping force and the compression damping force by setting a restoring solenoid valve and a compression solenoid valve at intervals on the outer wall of the oil storage cylinder assembly, and the damping force can be adjusted continuously and the damping force adjustment range is increased. However, since the two solenoid valves are set on the outer wall of the oil storage cylinder assembly, a large space needs to be reserved in the chassis before they can be used, which occupies a large space in the chassis. Summary of the invention

[0005] In order to better solve the above problems, the present invention provides a novel dual-solenoid valve shock absorber, which can increase the damping adjustment range of the shock absorber and reduce the space occupied by the chassis.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a novel dual-solenoid valve shock absorber, comprising a coaxially sleeved oil storage cylinder, an intermediate cylinder, a working cylinder and a piston rod, characterized in that it also comprises a restoring valve assembly, a compression valve assembly, a piston assembly and a restoring solenoid valve and a compression solenoid valve; wherein the restoring valve assembly is connected to the lower end of the piston rod and divides the working chamber into an upper chamber and a lower chamber connected by the restoring valve, the compression valve assembly is arranged at the bottom end of the working cylinder and connects the lower chamber of the working cylinder with the oil storage chamber; the restoring solenoid valve is connected to the outer surface of the oil storage cylinder side, connecting the upper chamber of the working cylinder with the oil storage chamber; the compression solenoid valve is arranged at the bottom of the oil storage cylinder, connecting the lower chamber of the working cylinder with the oil storage chamber; when the piston rod moves upward, the first part of the oil in the upper chamber flows into the restoration solenoid valve through the intermediate cylinder and then flows into the oil storage chamber, and the second part of the oil flows into the lower chamber through the restoration valve; when the piston rod moves downward, the first part of the oil in the lower chamber flows into the compression solenoid valve through the compression valve assembly and then flows into the oil storage chamber, the second part of the oil flows into the oil storage chamber through the compression valve assembly, and the third part of the oil flows into the upper chamber through the restoration valve.

[0007] Optionally, part of the oil that flows into the oil storage chamber when the piston rod moves upward passes through the compression valve and then flows into the lower chamber of the working cylinder.

[0008] Optionally, a one-way valve is provided at the restoration solenoid valve to connect the upper chamber of the working cylinder with the oil storage chamber, and the conduction direction of the one-way valve is toward one side of the working cylinder; when the piston rod moves downward, part of the oil flowing into the oil storage chamber passes through the one-way valve and then flows into the lower chamber of the working cylinder.

[0009] Optionally, a compression solenoid valve is connected to the bottom end of the compression valve assembly.

[0010] Compared with the prior art, the novel dual solenoid valve shock absorber of the present invention has the following beneficial effects: In the novel dual-solenoid valve shock absorber, the upper and lower chambers of the working cylinder can circulate oil through the compression piston valve, the upper chamber of the working cylinder can circulate oil with the oil storage chamber through the compression solenoid valve, and the lower chamber of the working cylinder can circulate oil with the oil storage chamber through the compression valve and the compression solenoid valve. During the restoring stroke, the restoring solenoid valve can be used to adjust the pressure in the upper chamber of the working cylinder to achieve adjustment of the restoring damping force; during the compression stroke, the compression solenoid valve can be used to adjust the pressure in the lower chamber of the working cylinder to achieve adjustment of the compression damping force, thereby achieving adjustable restoring and compression damping forces with a large adjustment range.

[0011] Compared with the existing structure in which two solenoid valves are arranged on the outside of the cylinder, the new dual-solenoid valve shock absorber can greatly reduce the chassis space occupied by the shock absorber by arranging the restoration solenoid valve on the side wall of the oil storage cylinder and the compression solenoid valve at the axial end of the oil storage cylinder. It can achieve a wider range of damping force adjustment while the overall structure occupies less chassis space. In addition, the solenoid valve at the axial end does not require a lot of avoidance design, will not affect the overall structural strength, and reduce the initial research and development and production costs of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a structural schematic diagram of a novel dual-solenoid valve shock absorber according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the principle of the restoring stroke of the novel dual-solenoid valve shock absorber according to an embodiment of the present invention; Figure 3 The schematic diagram of the compression stroke of the novel dual-solenoid valve shock absorber according to the embodiment of the present invention.

[0014] Reference numerals: 1. Oil storage cylinder; 2. Working cylinder; 3. Intermediate cylinder; 4. Guide assembly; 5. Piston rod; 6. Restoring valve assembly; 7. Compression valve assembly; 8. Restoring solenoid valve; 9. Compression solenoid valve; 10. Check valve; 11. Oil storage chamber; 12. Upper chamber; 13. Lower chamber. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] like Figure 1-3 As shown, the novel dual-solenoid valve shock absorber of the embodiment of the present invention comprises an oil storage cylinder 1, an intermediate cylinder 3 and a working cylinder 2. The oil storage cylinder 1 is the main cylinder body of the shock absorber and is located outside. The working cylinder 2 is coaxially sleeved in the oil storage cylinder 1, and the sealing sleeve of the intermediate cylinder 3 is arranged between the working cylinder 2 and the oil storage cylinder 1. A working chamber is formed in the working cylinder 2, a guide chamber is formed between the inner wall of the intermediate cylinder 3 and the working cylinder 2, and an oil storage chamber 11 is formed between the oil storage cylinder 1 and the working cylinder 2 (including the outer wall part of the intermediate cylinder 3). The working chamber, the guide chamber and the oil storage chamber 11 are filled with hydraulic oil.

[0018] The dual solenoid valve shock absorber also includes a restoring valve assembly 6, a compression valve assembly 7, a piston assembly and a restoring solenoid valve 8, and a compression solenoid valve 9, wherein the piston assembly includes a piston rod 5 and a guide assembly 4, wherein the guide assembly 4 is sealed and arranged at the top of the oil storage cylinder 1 and the working cylinder 2, and a guide hole is arranged at the center; the piston rod 5 is arranged in the working chamber and the upper end extends out of the guide hole, and the guide assembly 4 can ensure that the piston rod 5 is coaxial with the working cylinder 2 and the oil storage cylinder 1. Here, the guide assembly 4 can be a downward multi-step convex structure (with a guide hole at the center), an oil seal is arranged at the connection between the guide assembly and the oil storage cylinder and the working cylinder, and an oil seal is arranged in the guide hole between the piston rod and the guide assembly. The size of the guide hole matches that of the piston rod 5 (the inner diameter of the guide hole is equal to the outer diameter of the piston rod 5), and the piston rod 5 can move up and down along the guide hole.

[0019] The restoring valve assembly 6 includes a restoring piston valve (also known as a restoring valve), which is connected to the lower end of the piston rod 5, and the top end is fixedly connected to the lower end of the piston rod 5. The lower peripheral side has a sealing sleeve, which divides the working chamber in the working cylinder 2 into an upper chamber 12 and a lower chamber 13. The upper and lower chambers of the working cylinder 2 are connected through the internal oil circuit of the restoring piston valve, so that the oil in the upper and lower chambers can flow. The compression valve assembly 7 is arranged at the bottom end of the working cylinder 2. The compression valve assembly 7 includes a compression valve, which can be installed at the bottom end of the working cylinder 2 by installing a fixed sleeve and a valve seat at the bottom of the working cylinder 2, and the valve stem of the compression valve extends into the working chamber from the bottom. Here, the valve stem is a hollow rod, which is used to realize the connection between the lower chamber 13 of the working cylinder and the compression valve. The side of the compression valve has an oil channel connected to the bottom end of the oil storage chamber 11, which can realize the oil in the lower chamber 13 of the working cylinder 2 flowing into the oil storage chamber 11 through the compression valve.

[0020] The restoring solenoid valve 8 is connected to the outside of the oil storage cylinder 1. The restoring solenoid valve 8 can be fixedly installed in the valve seat and sealed by installing a tubular valve seat extending outward on the side wall of the oil storage cylinder 1. The inner side of the valve seat has a through hole connected to the oil storage chamber 11, forming an oil passage connecting the restoring solenoid valve 8 and the oil storage chamber 11; it also has an oil passage connected to the upper chamber 12 of the working cylinder, which can be specifically formed by a through hole connected to the guide chamber, the guide chamber, and a through hole connecting the guide chamber and the upper chamber 12, so that the oil in the upper chamber 12 can flow into the restoring solenoid valve 8 and then into the oil storage chamber 11.

[0021] The compression solenoid valve 9 is arranged at the bottom of the oil storage cylinder, connecting the lower chamber 13 of the working cylinder 2 with the oil storage chamber. Here, the compression solenoid valve 9 can be installed on the outer side of the bottom of the oil storage cylinder through the installation valve block or arranged on the bottom side (lower side) of the bottom. Both ends of the compression solenoid valve 9 have oil passages connecting the oil storage chamber and the lower chamber 13 of the working cylinder, respectively, so that the oil in the lower chamber 13 of the working cylinder 2 can flow into the compression solenoid valve 9 after passing through the compression valve, and then flow into the oil storage chamber 11.

[0022] In an optional embodiment, the compression solenoid valve 9 is connected to the bottom end of the compression valve of the compression valve assembly 7. The valve seat of the compression solenoid valve 9 can be connected to the valve seat of the compression valve, and the oil inlet end of the upper end of the compression valve is connected to the oil outlet end of the lower end of the valve stem of the compression valve; the oil outlet end of the compression solenoid valve 9 has an oil channel connected to the oil storage chamber 11, which can make the oil in the lower chamber 13 of the working cylinder 2 flow into the compression solenoid valve 9 through the valve stem of the compression valve, and then flow into the oil storage chamber 11.

[0023] During the operation of the new dual solenoid valve shock absorber, the flow direction of the shock absorber oil is as follows: Figure 2 and 3As shown, when the piston rod 5 moves upward, the first part of the oil in the upper chamber 12 of the working cylinder 2 flows into the guide chamber of the intermediate cylinder 3, flows into the restoration solenoid valve 8 through the guide chamber, and then flows into the oil storage chamber 11 through the restoration solenoid valve 8. The oil impacts the valve plate to generate a part of the damping force; the second part of the oil flows into the lower chamber 13 through the restoration valve, and then generates a part of the damping force. In this restoration stroke, the two parts of the damping force form the restoration damping force of the shock absorber, and the damping force is larger. The pressure of the upper chamber 12 of the working cylinder 2 can be adjusted by controlling the valve body opening of the restoration solenoid valve 8 to achieve the adjustment of the restoration damping force, and the damping adjustment range is larger. When the piston rod 5 moves downward, the first part of the oil in the lower chamber 13 of the working cylinder 2 flows into the compression solenoid valve 9 through the hollow valve stem of the compression valve, and then flows into the oil storage chamber 11 through the compression solenoid valve 9. The oil impacts the valve plate to generate a part of the damping force; the second part of the oil flows into the oil storage chamber 11 after passing through the compression valve, and then generates a part of the damping force; the third part of the oil flows upward through the restoring piston valve into the upper chamber 12, and then generates a part of the damping force. In this compression stroke, the three parts of the damping force form the compression damping force of the shock absorber, and the damping force value is larger. The pressure of the lower chamber 13 of the working cylinder 2 can be adjusted by controlling the valve opening of the compression solenoid valve 9 to achieve the adjustment of the compression damping force, and the damping adjustment range is larger.

[0024] Furthermore, in the upward recovery stroke of the piston, after the first part of the oil flows into the oil storage chamber 11, part of the oil in the oil storage chamber 11 flows into the compression valve and flows into the lower chamber 13 of the working cylinder 2 through the compression valve. In the downward compression stroke of the piston, after the first and second parts of the oil flow into the oil storage chamber 11, part of the oil in the oil storage chamber 11 flows into the one-way valve 10 provided on the recovery solenoid valve 8 and then flows into the upper chamber 12 of the working cylinder 2. Here, the conduction direction of the one-way valve 10 faces the inside (the side of the working cylinder 2), and the oil outlet end can be connected to the through hole provided on the guide chamber, and the oil inlet end can be connected to the oil path connected to the rear end of the recovery solenoid valve 8 and the oil storage chamber 11. The oil in the oil storage chamber 11 can flow into the guide chamber after passing through the one-way valve 10, and then flow into the upper chamber 12 of the working cylinder 2.

[0025] In this novel dual-solenoid valve shock absorber, although the two solenoid valves are arranged on the outside of the shock absorber, in fact, the compression solenoid valve 9 is arranged at the axial end of the oil storage cylinder 1, and only the recovery solenoid valve 8 is arranged on the side wall of the oil storage cylinder 1. Compared with the existing structure in which two solenoid valves are arranged on the outside of the cylinder, the chassis space occupied by the shock absorber can be greatly reduced, and a larger range of damping force adjustment can be achieved while the overall structure occupies a smaller chassis space. In addition, the solenoid valve at the axial end does not require a lot of avoidance design, will not affect the overall structural strength, and reduce the initial research and development and production costs of the shock absorber.

[0026] According to an exemplary embodiment of the present invention, the new dual-solenoid valve shock absorber can be applied to a vehicle active suspension system. The control system of the active suspension system sends control signals to the restoring solenoid valve 8 and the compression solenoid valve 9 according to the real-time vehicle driving conditions. The valve opening can be adjusted and controlled by changing the input current of the solenoid valve, thereby realizing stepless adjustment and control of the damping force of the shock absorber, ensuring the smoothness of the vehicle and improving the driving comfort of the vehicle.

[0027] In actual application scenarios, the oil storage cylinder 1, working cylinder 2, piston assembly, restoring valve assembly 6, compression valve assembly 7, restoring solenoid valve 8 and compression solenoid valve 9 and other components in the new dual solenoid valve shock absorber of the embodiment of the present invention can be designed accordingly according to the shock absorber specification signal, damping force adjustment requirements, etc. in actual working conditions, or adopt equipment with corresponding functions and specifications in the existing technology.

[0028] Furthermore, other devices or components may be arranged in the novel dual-solenoid valve shock absorber, or the actual installation positions of the devices or components may be adjusted to realize the practical application or other functions of the novel dual-solenoid valve shock absorber. For example, the position of the restoring solenoid valve 8 on the outer wall of the oil storage cylinder 1 may be adjusted accordingly according to the vehicle chassis structure design while realizing the above functions.

[0029] It should be noted that, according to implementation needs, the various components described in the embodiments of the present invention may be split into more components, or two or more components or parts of components may be combined into a new component to achieve the purpose of the embodiments of the present invention.

[0030] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A novel dual-solenoid valve shock absorber, comprising a coaxially sleeved oil storage cylinder, an intermediate cylinder, a working cylinder and a piston rod, characterized in that: It also includes a recovery valve assembly, a compression valve assembly, a piston assembly, a recovery solenoid valve, and a compression solenoid valve; wherein, The restoring valve assembly is connected to the lower end of the piston rod and divides the working chamber into an upper chamber and a lower chamber connected by the restoring valve, and the compression valve assembly is arranged at the bottom end of the working cylinder and connects the lower chamber of the working cylinder with the oil storage chamber; The restoring solenoid valve is connected to the outside of the oil storage cylinder to connect the upper chamber of the working cylinder with the oil storage chamber; the compression solenoid valve is arranged at the bottom of the oil storage cylinder to connect the lower chamber of the working cylinder with the oil storage chamber; When the piston rod moves upward, the first part of the oil in the upper chamber flows into the restoring solenoid valve through the intermediate cylinder and then flows into the oil storage chamber, and the second part of the oil flows into the lower chamber through the restoring valve; When the piston rod moves downward, the first part of the oil in the lower chamber flows into the compression solenoid valve through the compression valve assembly and then into the oil storage chamber, the second part of the oil flows into the oil storage chamber through the compression valve assembly, and the third part of the oil flows into the upper chamber through the recovery valve.

2. A novel dual solenoid valve shock absorber according to claim 1, characterized in that: When the piston rod moves upward, part of the oil that flows into the oil storage chamber passes through the compression valve and then flows into the lower chamber of the working cylinder.

3. A novel dual solenoid valve shock absorber according to claim 1, characterized in that: A one-way valve is provided at the restoration solenoid valve to connect the upper chamber of the working cylinder with the oil storage chamber, and the conduction direction of the one-way valve is toward one side of the working cylinder; when the piston rod moves downward, part of the oil flowing into the oil storage chamber passes through the one-way valve and then flows into the lower chamber of the working cylinder.

4. A novel dual solenoid valve shock absorber according to any one of claims 1-3, characterized in that: The compression solenoid valve is connected to the bottom end of the compression valve assembly.

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