Novel shock absorber with internal electromagnetic valve and external electromagnetic valve

Abstract

The invention provides a novel internal and external 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 piston assembly, a recovery electromagnetic valve and a compression electromagnetic valve. The recovery solenoid valve is connected to the lower end of the piston rod, and the recovery valve assembly is connected to the lower end of the recovery solenoid valve and divides the working cylinder into an upper cavity and a lower cavity which are communicated with the recovery solenoid valve and the recovery valve; the compression valve assembly is arranged at the bottom end of the working cylinder and enables a lower cavity of the working cylinder to be communicated with the oil storage cylinder. The compression electromagnetic valve is connected to the outer wall of the oil storage cylinder and enables the lower cavity of the working cylinder to be communicated with the oil storage cavity. According to the novel internal and external double-electromagnetic-valve shock absorber, the space of a chassis can be reduced, and damping adjustment in a large range is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, and in particular to a novel shock absorber with internal and external double electromagnetic valves. 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 internal and external dual solenoid valve shock absorber, which can reduce the space occupied by the chassis and increase the damping adjustment range of the shock absorber.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a novel internal-external dual solenoid valve shock absorber, comprising a coaxially sleeved oil storage cylinder, an intermediate cylinder, a working cylinder and a piston rod, and also comprising a restoring valve assembly, a compression valve assembly, a piston assembly and a restoring solenoid valve and a compression solenoid valve; wherein the restoring solenoid valve is connected to the lower end of the piston rod, the restoring valve assembly is connected to the lower end of the restoring solenoid valve, and the working cylinder is divided into an upper chamber and a lower chamber connected by the restoring solenoid valve and 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 cylinder, and the compression solenoid valve is connected to the outer wall of the oil storage cylinder and connects the lower chamber of the working cylinder with the oil storage chamber.

[0007] Optionally, when the piston rod moves upward, the oil in the upper chamber flows into the lower chamber through the restoration solenoid valve and the restoration valve.

[0008] Optionally, when the piston rod moves downward, the first part of the oil in the lower chamber flows into the oil storage chamber through the compression solenoid valve, 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.

[0009] Compared with the prior art, the novel internal and external dual solenoid valve shock absorber of the present invention has the following beneficial effects: This new type of internal and external dual solenoid valve shock absorber, by building the restoring solenoid valve into the working cylinder and arranging the compression solenoid valve on the outside of the shock absorber, can effectively optimize the shock absorber structure and greatly reduce the chassis space occupied by the shock absorber compared to the existing structure in which two solenoid valves are arranged on the outside of the cylinder. There is no need to reserve a large space or avoidance design on the chassis, which can reduce the research and development and production costs of the shock absorber and chassis suspension system.

[0010] In this novel internal and external dual solenoid valve shock absorber, the upper and lower chambers of the working cylinder are connected through the restoring solenoid valve and the restoring piston valve. During the restoring stroke, the pressure in the upper chamber of the working cylinder can be adjusted by adjusting the valve opening of the restoring solenoid valve, thereby realizing adjustable restoring damping of the shock absorber; the lower chamber of the working cylinder is also connected to the oil storage chamber through the compression solenoid valve and the compression valve. During the compression stroke, the pressure in the lower chamber of the working cylinder can be adjusted by adjusting the valve opening of the compression solenoid valve, thereby realizing adjustable compression damping of the shock absorber, thereby realizing the adjustment of the restoring and compression damping forces, and the damping adjustment range is increased, which is more conducive to ensuring the smooth form of the vehicle and improving the driving comfort of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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.

[0012] Figure 1 It is a structural schematic diagram of a novel internal and external 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 internal and external 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 internal and external dual solenoid valve shock absorber according to an embodiment of the present invention.

[0013] 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; 11. Oil storage chamber; 12. Upper chamber; 13. Lower chamber. DETAILED DESCRIPTION

[0014] 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.

[0015] 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.

[0016] like Figure 1-3 As shown, the novel internal and external 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, wherein 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), and the working chamber, the guide chamber and the oil storage chamber 11 are filled with hydraulic oil.

[0017] The novel internal and external 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.

[0018] The restoration solenoid valve 8 is connected to the lower end of the piston rod 5, and the top end of the restoration solenoid valve is fixedly connected to the lower end of the piston rod 5, and can slide up and down in the working cylinder as the piston rod 5 moves up and down, so that the oil in the upper part of the restoration solenoid valve in the working cylinder can flow to the lower part of the restoration solenoid valve through the oil path of the restoration solenoid valve. The restoration valve assembly 6 is connected to the lower end of the restoration solenoid valve, and the restoration valve assembly 6 includes a restoration piston valve (that is, a restoration valve), and the restoration valve is connected to the lower end of the restoration solenoid valve 8. The top end of the valve seat of the restoration valve is connected to the lower end of the valve seat of the restoration solenoid valve 8, and the lower peripheral side of the valve seat of the restoration valve is tightly attached to the inner wall of the working cylinder, so that the oil in the upper part of the restoration valve in the working cylinder can only flow to the lower part of the restoration valve through the oil path of the restoration valve. Thus, the restoration solenoid valve 8 and the restoration valve separate the working cylinder 2 into an upper chamber 12 and a lower chamber 13. The upper and lower chambers of the working cylinder are connected through the restoration solenoid valve 8 and the restoration valve. The oil in the upper chamber 12 of the working cylinder can flow through the restoration solenoid valve and the restoration valve in sequence and flow into the lower chamber 13 of the working cylinder. Here, the outer diameter of the valve seat arranged on the lower peripheral side of the restoration solenoid valve 8 is smaller than the inner diameter of the working cylinder, that is, there is a certain gap between the outer side of the restoration solenoid valve 8 and the inner wall of the working cylinder. The upper and lower chambers of the working cylinder are actually connected to the restoration valve through the restoration solenoid valve and the gap between the restoration solenoid valve and the inner wall of the working cylinder, so that the oil above the restoration solenoid valve in the working cylinder can flow to the bottom of the restoration solenoid valve through the gap and flow into the restoration valve, and then flow into the lower chamber of the working cylinder; conversely, the oil below the restoration solenoid valve can flow to the top of the restoration solenoid valve through the gap, that is, the oil in the lower chamber 13 of the working cylinder can flow into the upper chamber 12 of the working cylinder through the restoration valve and the gap after the valve plate is opened by pressure impact.

[0019] 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. The compression valve can be sealed and installed at the bottom end of the working cylinder 2 by installing a fixing sleeve and a valve seat at the bottom of the working cylinder 2, and an oil channel connected to the lower chamber 13 of the working cylinder is arranged on the valve seat. The other end of the oil channel is connected to the bottom of the oil storage cylinder, so that the oil in the lower chamber 13 of the working cylinder can flow into the oil storage chamber 11 through the compression valve.

[0020] The compression solenoid valve 9 is connected to the outside of the oil storage cylinder 1. The compression solenoid valve 9 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 cylinder 1 and the intermediate cylinder 3, forming an oil passage connecting the compression solenoid valve 9 with the oil storage chamber 11 and the diversion chamber. Here, the intermediate cylinder 3 is located at the outer wall of the working cylinder corresponding to the lower chamber 13 of the working cylinder, and the outer wall of the working cylinder corresponding to the diversion chamber has a through hole, so that the lower chamber 13 of the working cylinder is connected to the diversion chamber, and then can be connected to the oil storage chamber 11 through the compression solenoid valve 9. The oil in the lower chamber 13 of the working cylinder can flow through the diversion chamber, the compression solenoid valve 9 in sequence, and flow into the oil storage chamber 11.

[0021] During the operation of the new type of internal and external dual solenoid valve shock absorber, the flow direction of the shock absorber oil is as follows: Figure 2 and 3 As shown, when the piston rod 5 moves upward, the oil in the upper chamber 12 of the working cylinder 2 flows into the restoring valve through the restoring solenoid valve 8 and the gap between it and the inner wall of the working cylinder, and then flows into the lower chamber 13 of the working cylinder through the restoring valve. In this restoring stroke, the oil flows and impacts the valve plate to generate a part of the damping force, forming the restoring damping force. By controlling the valve opening of the restoring solenoid valve 8, the pressure of the upper chamber 12 of the working cylinder 2 can be adjusted, and the restoring damping can be adjusted. When the piston rod 5 moves downward, the first part of the oil in the lower chamber 13 of the working cylinder flows into the compression solenoid valve 9 through the intermediate cylinder, and then flows into the oil storage chamber 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 through the compression valve assembly, and the third part of the oil flows into the upper chamber 12 of the working cylinder through the restoring valve and the gap between the restoring solenoid valve and the inner wall of the working cylinder, 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 in 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.

[0022] The novel internal and external dual solenoid valve shock absorber of this embodiment, by installing the restoring solenoid valve inside the working cylinder and arranging the compression solenoid valve on the outside of the shock absorber, can effectively optimize the shock absorber structure and greatly reduce the chassis space occupied by the shock absorber, without reserving a large space and avoidance design on the chassis, thereby reducing the research and development and production costs of the shock absorber and the chassis suspension system.

[0023] According to an exemplary embodiment of the present invention, the shock absorber can realize adjustable damping of the shock absorber by adjusting the valve opening of the restoring solenoid valve, and realize adjustable compression damping of the shock absorber by adjusting the valve opening of the compression solenoid valve, and the damping adjustment width is large. It can be applied to the 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, and can perform valve opening adjustment control by changing the input current of the solenoid valve, thereby realizing stepless adjustment control of the damping force of the shock absorber, ensuring the smooth form of the vehicle, and improving the driving comfort of the vehicle.

[0024] In actual application scenarios, the components such as the oil storage cylinder 1, the working cylinder 2, the piston assembly, the restoring valve assembly 6, the compression valve assembly 7, the restoring solenoid valve 8 and the compression solenoid valve 9 in the new internal and external dual solenoid valve shock absorber of the embodiment of the present invention can be designed accordingly according to the specifications and models of the shock absorber and the damping force adjustment requirements in actual working conditions, or adopt equipment with corresponding functions and specifications in the existing technology.

[0025] Furthermore, other devices or components may be arranged in the novel internal and external 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.

[0026] 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.

[0027] 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 internal and external 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 restoring valve assembly, a compression valve assembly, a piston assembly, a restoring solenoid valve, and a compression solenoid valve; wherein the restoring solenoid valve is connected to the lower end of the piston rod, the restoring valve assembly is connected to the lower end of the restoring solenoid valve, and divides the working cylinder into an upper chamber and a lower chamber connected by the restoring solenoid valve and 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 cylinder, and the compression solenoid valve is connected to the outer wall of the oil storage cylinder and connects the lower chamber of the working cylinder with the oil storage chamber.

2. According to claim 1, the novel internal and external dual solenoid valve shock absorber is characterized in that: When the piston rod moves upward, the oil in the upper chamber flows into the lower chamber through the restoring solenoid valve and the restoring valve.

3. The novel internal and external dual solenoid valve shock absorber according to claim 1 is characterized in that: When the piston rod moves downward, the first part of the oil in the lower chamber flows into the oil storage chamber through the compression solenoid valve, 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.

Images