Three-way adjustable damping dual external solenoid valve electronically controlled shock absorber

Abstract

The present invention provides a three-oil-circuit adjustable damping dual-external solenoid valve electrically controlled shock absorber, wherein a restoration end flow guide seat is provided on the restoration intermediate cylinder; a restoration passive valve is provided between the restoration solenoid valve and the restoration end flow guide seat; the restoration damping valve plate is used in conjunction with the restoration passive valve seat to generate a damping force in the restoration stroke; the restoration check valve assembly is used in conjunction with the restoration passive valve seat to open in the compression stroke to form an oil compensation channel; a compression end flow guide seat is provided on the compression intermediate cylinder; a compression passive valve is provided between the compression solenoid valve and the compression end flow guide seat; the compression damping valve plate is used in conjunction with the compression passive valve seat to generate a damping force in the compression stroke; the compression check valve assembly is used in conjunction with the compression passive valve seat to open in the restoration stroke to form an oil compensation channel. The dual-external solenoid valve electrically controlled shock absorber of the present invention has a newly designed structure, more oil circuit and valve system combinations, stronger adjustability, higher safety performance, and is easy to debug, which can speed up debugging efficiency.

Description

Technical Field

[0001] The invention relates to a shock absorber, in particular to a three-oil-circuit damping-adjustable double-external electromagnetic valve electronically controlled shock absorber. Background Art

[0002] With the development of intelligent automobile chassis, the research and development of intelligent suspension has also made great progress. As an important component of the suspension, the performance of shock absorbers is becoming increasingly powerful. In traditional passive shock absorbers, there are only two passive valve systems, namely the piston valve and the bottom valve, which play a major role in slowing down the flow of oil in the recovery stroke and compression stroke of the shock absorber, respectively. The friction between the oil and the valve system components and the friction between the microscopic particles of the oil generate heat, and finally the kinetic energy of the vehicle body and tires is converted into internal energy and dissipated into the air (this is the basic principle of the shock absorber to generate damping force), thereby reducing the vibration of the vehicle and ensuring the comfort and controllability of the vehicle.

[0003] The damping-adjustable shock absorber can change its hardness and softness under different road conditions, which solves the problem that the valve system of traditional passive shock absorbers cannot be adjusted, so that the vehicle can maintain good grip and comfort under different road conditions.

[0004] Among the many types of adjustable damping shock absorbers, the most commonly used ones are electronic hydraulic electronically controlled shock absorbers. The principle is that the shock absorber has a built-in or external solenoid valve, and the softness or hardness change of the shock absorber is ultimately achieved by controlling the valve system opening of the solenoid valve. The initial external solenoid valve type hydraulic electronically controlled shock absorber was a single solenoid valve type, that is, a solenoid valve was installed on the outside of the shock absorber, and the oil flowed through this solenoid valve in both the recovery and compression strokes. Therefore, the design of the solenoid valve needs to take into account the damping force requirements of both the recovery and compression strokes, and the effect of separate control of the damping force of the recovery and compression strokes cannot be achieved. The dual external solenoid valve electronically controlled shock absorber can achieve separate control of the damping force of the recovery and compression strokes. This type of shock absorber is equipped with a recovery solenoid valve and a compression solenoid valve on the outside, while retaining the passive valve system combination, namely the piston valve and the bottom valve. See the specific internal structure diagram. Figure 1 .

[0005] The prior art dual external solenoid valve electronically controlled shock absorber still has the following disadvantages and shortcomings:

[0006] 1. Limited adjustability. The piston valve and the bottom valve are a combination of a traditional flow piston, a valve plate, and a spring, that is, the two retain the function of generating damping. The oil circuit structure in the recovery stroke is a parallel form of the recovery valve system of the piston valve and the recovery solenoid valve. The upper and lower limits of the recovery damping force can only be determined by these two valves. Similarly, the upper and lower limits of the compression damping force can only be determined by the compression solenoid valve and the bottom valve. Limited by the number of oil circuit and valve system combinations, the damping force adjustability of the traditional dual external solenoid valve electronically controlled shock absorber is limited.

[0007] 2. It is impossible to take into account both the wide range of damping requirements and safety performance. Since the electronically controlled shock absorber can achieve adjustable damping, there are many models that adjust the damping force range to a large extent. The upper limit requirement of the ultimate damping force in the sports mode is relatively high, that is, the hard boundary stiffness of the valve system is very large, so the shock absorber is indispensable for the pressure relief and overflow function under the extreme speed in the sports mode. In the prior art, in order to obtain a very high damping force, the stiffness of the corresponding valve system must be designed to be very high. Once the shock absorber encounters the working condition of extreme movement, its internal pressure will instantly rise to an extremely high state, which will cause a great impact on the sealing components of the shock absorber and the surrounding parts of the suspension and chassis, and the safety needs to be improved.

[0008] 3. Low debugging efficiency. In the valve system debugging process of the dual external electronically controlled shock absorber in the prior art, the piston valve and the bottom valve need to be debugged, so the entire shock absorber needs to be disassembled and assembled repeatedly, resulting in low debugging efficiency. Summary of the invention

[0009] In order to overcome the shortcomings of the prior art, the present invention provides a three-oil-circuit adjustable damping dual external solenoid valve electronically controlled shock absorber. The dual external solenoid valve electronically controlled shock absorber of the present invention has a newly designed structure, more oil circuit and valve system combinations, stronger adjustability, higher safety performance, and is easy to debug, which can speed up debugging efficiency and reduce debugging costs.

[0010] The present invention provides the following technical solutions:

[0011] The three-oil-circuit damping adjustable double external solenoid valve electric-controlled shock absorber comprises an outer cylinder, an inner cylinder, a piston valve, a bottom valve, a restoring intermediate cylinder, a compression intermediate cylinder, a restoring solenoid valve and a compression solenoid valve; the piston valve is arranged in the inner cylinder to divide the internal space of the inner cylinder into an upper cavity and a lower cavity; the bottom valve is interference-connected with the lower end of the inner cylinder; the restoring intermediate cylinder and the compression intermediate cylinder are sleeved outside the inner cylinder, the restoring intermediate cylinder is connected with the upper cavity of the inner cylinder through the upper flow guide hole on the inner cylinder, and the compression intermediate cylinder is connected with the lower cavity of the inner cylinder through the lower flow guide hole on the inner cylinder; the restoring intermediate cylinder is provided with a restoring intermediate cylinder flow guide hole, and the outer cylinder is provided with a restoring solenoid valve seat. The restoration intermediate cylinder flow guide hole is coaxial with the restoration electromagnetic valve seat, and the restoration electromagnetic valve is installed in the restoration electromagnetic valve seat; the compression intermediate cylinder is provided with a compression intermediate cylinder flow guide hole, and the outer cylinder is provided with a compression electromagnetic valve seat, the compression intermediate cylinder flow guide hole is coaxial with the compression electromagnetic valve seat, and the compression electromagnetic valve is installed in the compression electromagnetic valve seat; the restoration intermediate cylinder is provided with a restoration end flow guide seat at the restoration intermediate cylinder flow guide hole; a restoration passive valve is provided between the restoration electromagnetic valve and the restoration end flow guide seat; the restoration passive valve includes a restoration connecting sleeve, and the restoration connecting sleeve is sequentially provided with a restoration electromagnetic valve connecting seat, a restoration damping valve plate, and a restoration passive valve. The outer diameter of the passive valve seat is in interference connection with the guide seat at the restoration end, and the connection seat of the restoration solenoid valve is in interference connection with the outer diameter of the inlet end of the restoration solenoid valve; the passive valve seat is provided with a restoration damping channel and a compression compensation channel; the restoration damping valve plate is used in conjunction with the passive valve seat to generate a damping force in the restoration stroke; the restoration check valve assembly is used in conjunction with the passive valve seat to open in the compression stroke to form an oil compensation channel; the compression intermediate cylinder is provided with a compression end guide seat at the guide hole of the compression intermediate cylinder; a compression solenoid valve is provided between the compression solenoid valve and the compression end guide seat dynamic valve; the compression passive valve comprises a compression connecting sleeve, on which a compression solenoid valve connecting seat, a compression damping valve plate, a compression passive valve seat and a compression check valve assembly are sequentially mounted; the outer diameter of the compression passive valve seat is interference-connected with the compression end guide seat, and the compression solenoid valve connecting seat is interference-connected with the outer diameter of the compression solenoid valve inlet end; a compression damping channel and a restoration compensation channel are provided on the compression passive valve seat; the compression damping valve plate is used in conjunction with the compression passive valve seat to generate a damping force in the compression stroke; the compression check valve assembly is used in conjunction with the compression passive valve seat, and is opened in the restoration stroke to form an oil compensation channel.

[0012] Compared with the prior art, the three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber of the present invention adopts a newly designed structure, and has three oil circuits that can generate damping force in the recovery stroke and the compression stroke, respectively, and has the following significant improvements:

[0013] 1) More oil circuits, thus stronger adjustability. Compared with the dual external electronically controlled shock absorbers with two oil circuits for both recovery and compression on the current market, the shock absorber oil circuit and valve system combination of the present invention is more. For the recovery stroke of the shock absorber, the stiffness of the recovery passive valve and the piston valve can be adjusted to match the selection of the recovery solenoid valve. For the compression stroke of the shock absorber, the stiffness of the compression passive valve and the bottom valve can be adjusted to match the selection of the compression solenoid valve. It is more adjustable and can better meet the detailed requirements of the OEM for the damping force under various oil flow rates.

[0014] 2) Higher safety performance. In the recovery stroke, one of the recovery passive valve and the piston valve can be used in combination with the recovery solenoid valve to determine the upper and lower limits of the recovery damping force, and the remaining passive valve can be used as a safety relief valve; in the compression stroke, one of the compression passive valve and the bottom valve can be used in combination with the compression solenoid valve to determine the upper and lower limits of the compression damping force, and the remaining passive valve can be used as a safety relief valve. In the sports mode, when the shock absorber instantaneously rises to an extremely high internal pressure under extreme road conditions, the relief valve can be opened, and the shock absorber sealing component can be protected from extreme impact, extending its service life.

[0015] 3) It can improve the debugging efficiency. During the debugging process, after the piston valve and the bottom valve are designed and locked, the damping force at other speed sections and current points can be achieved only by adjusting the recovery passive valve, the recovery solenoid valve, and the compression passive valve and the compression solenoid valve. In this process, you only need to unscrew the recovery solenoid valve or the compression solenoid valve, take out the recovery passive valve or the compression passive valve, and adjust it. There is no need to disassemble the entire internal parts of the shock absorber for debugging, which can speed up the debugging efficiency and reduce the debugging cost.

[0016] As an optimization, in order to facilitate manufacturing, in the technical solution of the aforementioned three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber, one end of the recovery connection sleeve is provided with a step, and the other end is formed into a flange by riveting to press the parts mounted on the outside thereof. Furthermore, in order to improve the structural stability and the sealing of the oil circuit and stabilize the performance of the shock absorber, the end plane of the recovery solenoid valve is against the flange on the recovery connection sleeve.

[0017] As an optimization, in order to facilitate manufacturing, in the technical solution of the aforementioned three-oil-circuit damping adjustable dual external solenoid valve electronically controlled shock absorber, one end of the compression connection sleeve is provided with a step, and the other end is formed into a flange by riveting to press the parts mounted on the outside thereof. Furthermore, in order to improve the structural stability and the sealing of the oil circuit and stabilize the performance of the shock absorber, the end plane of the compression solenoid valve is against the flange on the compression connection sleeve.

[0018] As an optimization, in the technical solution of the aforementioned three-oil-circuit damping adjustable dual external solenoid valve electronically controlled shock absorber, a platform is provided on the said restoration intermediate cylinder and the compression intermediate cylinder respectively, and the end planes of the said restoration end guide seat and the compression end guide seat are respectively in contact with the platforms on the restoration intermediate cylinder and the compression intermediate cylinder. By providing a platform on the intermediate cylinder, the guide seat and the intermediate cylinder form a plane match, and the two matching planes constrain each other, which can improve the stability of the guide seat, thereby improving the reliability of the shock absorber.

[0019] As an optimization, in the technical solution of the aforementioned three-oil-circuit damping adjustable dual external solenoid valve electric-controlled shock absorber, the end of the recovery end flow guide seat is processed with a recovery end flow guide seat connecting ring, and the recovery end flow guide seat connecting ring is assembled in the recovery middle cylinder flow guide hole; the end of the compression end flow guide seat is provided with a compression end flow guide seat connecting ring, and the compression end flow guide seat connecting ring is assembled in the compression middle cylinder flow guide hole. By processing a connecting ring on the flow guide seat and matching the connecting ring with the flow guide hole on the middle cylinder, the connection structure has stronger integrity and better structural reliability.

[0020] As an optimization, in the technical solution of the aforementioned three-oil-circuit damping adjustable dual external solenoid valve electronically controlled shock absorber, a step is respectively provided on the outer diameter of the recovery passive valve seat and the compression passive valve seat, and the recovery end guide seat and the compression end guide seat are respectively in contact with the step surface on the outer diameter of the recovery passive valve seat and the compression passive valve seat. In this structure, the step surface on the passive valve seat forms an axial limit on the guide seat, which prevents the guide seat from being axially displaced by the impact of oil, thereby further improving the reliability of the shock absorber.

[0021] As an optimization, in the aforementioned technical solution of the three-oil-circuit damping adjustable dual external solenoid valve electronically controlled shock absorber, in order to facilitate industrial implementation, during assembly, the restoration passive valve and the restoration end guide seat are first pressed into an interference connection, and then pressed into an interference connection with the restoration solenoid valve to obtain the restoration damping regulating valve assembly, and then the restoration damping regulating valve assembly is installed in the restoration solenoid valve seat; similarly, during assembly, the compression passive valve and the compression end guide seat are first pressed into an interference connection, and then pressed into an interference connection with the compression solenoid valve to obtain the compression damping regulating valve assembly, and then the compression damping regulating valve assembly is installed in the compression solenoid valve seat.

[0022] As an optimization, in the technical solution of the aforementioned three-oil-circuit damping adjustable dual external solenoid valve electronically controlled shock absorber, the restoring solenoid valve and the restoring solenoid valve seat are fixedly connected by threads; the compression solenoid valve and the compression solenoid valve seat are fixedly connected by threads. Therefore, during assembly, it is only necessary to tighten the restoring solenoid valve and the compression solenoid valve along the threads. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of a double external solenoid valve electronically controlled shock absorber of the prior art;

[0024] Figure 2 1 is a schematic diagram of the structure of a three-oil-circuit adjustable damping dual-external solenoid valve electronically controlled shock absorber according to an embodiment of the present invention;

[0025] Figure 3 is a structural schematic diagram of a restoring damping regulating valve assembly in an embodiment of the present invention;

[0026] Figure 4 is a structural schematic diagram of a compression damping regulating valve assembly in an embodiment of the present invention;

[0027] Figure 5 It is the oil circuit diagram of the recovery stroke of the shock absorber of the present invention;

[0028] Figure 6 It is the oil circuit diagram of the compression stroke of the shock absorber of the present invention.

[0029] Figure numerals: 1-outer cylinder, 101-recovery solenoid valve seat, 102-compression solenoid valve seat; 2-inner cylinder, 201-upper guide hole, 202-lower guide hole; 3-piston valve; 4-bottom valve; 5-recovery intermediate cylinder; 6-compression intermediate cylinder; 7-recovery solenoid valve; 8-compression solenoid valve; 9-recovery passive valve, 901-recovery connecting sleeve, 902-recovery solenoid valve connecting seat, 903-recovery damping valve plate, 904-recovery passive valve Seat, 905-recovery one-way valve assembly; 10-recovery end guide seat, 1001-recovery end guide seat connecting ring; 11-compression passive valve, 1101-compression connecting sleeve, 1102-compression solenoid valve connecting seat, 1103-compression damping valve plate, 1104-compression passive valve seat, 1105-compression one-way valve assembly; 12-compression end guide seat, 1201-compression end guide seat connecting ring; 13-one-way valve; 14-connecting sleeve. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below through specific embodiments, but it is not used as a basis for limiting the present invention. The contents not described in detail below or the structures not shown in the drawings are all common technical knowledge in the art.

[0031] See also Figure 1In the prior art double external solenoid valve electric control shock absorber, a one-way valve 13 is provided between the restoring solenoid valve 7 and the restoring intermediate cylinder 5, and a connecting sleeve 14 is provided between the compression solenoid valve 8 and the compression intermediate cylinder 6. In the restoring stroke, the oil flows from the upper chamber of the inner cylinder 2 through the upper guide hole 201 into the restoring intermediate cylinder 5, and then flows out from the guide hole of the restoring intermediate cylinder and flows into the restoring solenoid valve 7 through the channel on the one-way valve 13, generating a damping force; at the same time, the oil flows from the upper chamber of the inner cylinder 2 into the lower chamber through the piston valve 3, generating a damping force. In the compression stroke, the oil flows from the lower chamber of the inner cylinder 2 through the lower guide hole 202 into the compression intermediate cylinder 6, and then flows out from the guide hole of the compression intermediate cylinder and flows into the compression solenoid valve 8 through the connecting sleeve 14, generating a damping force; at the same time, the oil flows from the lower chamber of the inner cylinder 2 into the outer cylinder 1 through the bottom valve 4, generating a damping force. The prior art dual external solenoid valve electronically controlled shock absorber has only two oil circuits in both the restoring stroke and the compression stroke, and correspondingly, only two valve systems generate damping force.

[0032] See also Figure 2-Figure 6 The three-oil-circuit damping adjustable double external solenoid valve electric-controlled shock absorber of the present invention comprises an outer cylinder 1, an inner cylinder 2, a piston valve 3, a bottom valve 4, a restoring intermediate cylinder 5, a compression intermediate cylinder 6, a restoring solenoid valve 7 and a compression solenoid valve 8; the piston valve 3 is arranged in the inner cylinder 2, and the internal space of the inner cylinder 2 is divided into an upper cavity and a lower cavity; the bottom valve 4 is interference-connected with the lower end of the inner cylinder 2; the restoring intermediate cylinder 5 and the compression intermediate cylinder 6 are sleeved outside the inner cylinder 2, the restoring intermediate cylinder 5 is connected with the upper cavity of the inner cylinder 2 through the upper guide hole 201 on the inner cylinder 2, and the compression intermediate cylinder 6 is connected with the upper cavity of the inner cylinder 2 through the inner guide hole 201 on the inner cylinder 2. The lower guide hole 202 on the cylinder 2 is connected to the lower cavity of the inner cylinder 2; the restoration intermediate cylinder 5 is provided with a restoration intermediate cylinder guide hole, the outer cylinder 1 is provided with a restoration electromagnetic valve seat 101, the restoration intermediate cylinder guide hole is coaxial with the restoration electromagnetic valve seat 101, and the restoration electromagnetic valve 7 is installed in the restoration electromagnetic valve seat 101; the compression intermediate cylinder 6 is provided with a compression intermediate cylinder guide hole, the outer cylinder 1 is provided with a compression electromagnetic valve seat 102, the compression intermediate cylinder guide hole is coaxial with the compression electromagnetic valve seat 102, and the compression electromagnetic valve 8 is installed in the compression electromagnetic valve seat 102. The above structural settings are the same as the prior art.

[0033] Different from the prior art:

[0034] In the three-oil-circuit damping adjustable dual-external electromagnetic valve electronically controlled shock absorber of the present invention, a restoration end flow guide seat 10 is provided on the restoration intermediate cylinder 5 at the restoration intermediate cylinder flow guide hole; a restoration passive valve 9 is provided between the restoration electromagnetic valve 7 and the restoration end flow guide seat 10; the restoration passive valve 9 comprises a restoration connecting sleeve 901, on which a restoration electromagnetic valve connecting seat 902, a restoration damping valve plate 903, a restoration passive valve seat 904 and a restoration check valve assembly 905 are sequentially mounted; the restoration The outer diameter of the original passive valve seat 904 is in interference connection with the guide seat 10 at the restoration end, and the restoration solenoid valve connection seat 902 is in interference connection with the outer diameter of the inlet end of the restoration solenoid valve 7; the restoration passive valve seat 904 is provided with a restoration damping channel and a compression compensation channel; the restoration damping valve plate 903 is used in conjunction with the restoration passive valve seat 904 to generate a damping force in the restoration stroke; the restoration check valve assembly 905 is used in conjunction with the restoration passive valve seat 904 to open in the compression stroke to form an oil compensation channel;

[0035] At the same time, a compression end flow guide seat 12 is provided on the compression intermediate cylinder 6 at the compression intermediate cylinder flow guide hole; a compression passive valve 11 is provided between the compression solenoid valve 8 and the compression end flow guide seat 12; the compression passive valve 11 comprises a compression connecting sleeve 1101, on which a compression solenoid valve connecting seat 1102, a compression damping valve plate 1103, a compression passive valve seat 1104 and a compression check valve assembly 1105 are sequentially mounted; the outer surface of the compression passive valve seat 1104 The outer diameter of the compression solenoid valve is interference connected with the compression end guide seat 12, and the compression solenoid valve connecting seat 1102 is interference connected with the outer diameter of the inlet end of the compression solenoid valve 8; the compression passive valve seat 1104 is provided with a compression damping channel and a restoration compensation channel; the compression damping valve plate 1103 is used in conjunction with the compression passive valve seat 1104 to generate a damping force in the compression stroke; the compression check valve assembly 1105 and the compression passive valve seat 1104 are used in conjunction with each other and are opened in the restoration stroke to form an oil compensation channel.

[0036] like Figure 5 As shown in the figure, during the recovery stroke of the shock absorber, there are three oil circuits that can produce recovery damping:

[0037] Restoration damping oil circuit 1 Rr1: flows from the upper guide hole 201 at the upper end of the inner cylinder 2 to the chamber between the inner cylinder 2 and the restoration intermediate cylinder 5, then enters the restoration end guide seat 10, and then flows through the restoration connecting sleeve 901, and finally enters the restoration solenoid valve 7, generating damping force through the solenoid valve.

[0038] Restoration damping oil circuit 2 Rr2: Flows from the upper guide hole 201 at the upper end of the inner cylinder 2 to the chamber between the inner cylinder 2 and the restoration intermediate cylinder 5, then enters the restoration end guide seat 10, and finally flows through the restoration passive valve 9, generating damping force through the restoration passive valve 9.

[0039] Restoration damping oil circuit three Rr3: After being squeezed, the oil directly passes through the piston valve 3 from the upper chamber of the inner tube 2 into the lower chamber of the inner tube 2, and generates damping force through the piston valve 3.

[0040] During the recovery stroke, the oil compressed into the outer cylinder 1 passes through Figure 5 The two oil paths shown in the figure, namely, the restoring compensation oil path 1 Rc1 and the restoring compensation oil path 2 Rc2, enter the lower chamber of the inner cylinder 2 to compensate for the volume vacated by the upward movement of the piston.

[0041] like Figure 6 As shown in the figure, during the compression stroke of the shock absorber, there are also three oil circuits that can produce compression damping:

[0042] Compression damping oil circuit 1 Cc1: flows from the lower guide hole 202 at the lower end of the inner cylinder 2 to the chamber between the inner cylinder 2 and the compression intermediate cylinder 6, then enters the compression end guide seat 12, and then flows through the compression connecting sleeve 1101, and finally enters the compression solenoid valve 8, generating damping force through the solenoid valve.

[0043] Compression damping oil circuit 2 Cc2: Flows from the lower guide hole 202 at the lower end of the inner cylinder 2 to the chamber between the inner cylinder 2 and the compression intermediate cylinder 6, then enters the compression end guide seat 12, and finally flows through the compression passive valve 11, generating damping force through the compression passive valve 11.

[0044] Compression damping oil circuit three Cc3: After being squeezed, the oil directly passes through the bottom valve 4 from the lower cavity of the inner tube 2 into the outer tube 1, and generates damping force through the bottom valve 4.

[0045] During the compression stroke, the oil compressed into the outer cylinder 1 enters the upper chamber of the inner cylinder 2 through the compression compensation oil passage Cr1 shown in the figure to compensate for the volume vacated by the downward movement of the piston.

[0046] In a specific embodiment of the present invention, one end of the recovery sleeve 901 is provided with a step, and the other end is formed into a flange by riveting to press the parts mounted on the outside. Similarly, one end of the compression sleeve 1101 is provided with a step, and the other end is formed into a flange by riveting to press the parts mounted on the outside. During manufacturing, the parts are first mounted on the outside of the compression sleeve 1101, and then riveted by a rotary riveting process.

[0047] In a specific embodiment of the present invention, the end plane of the recovery solenoid valve 7 abuts against the flange on the recovery connecting sleeve 901. The end plane of the compression solenoid valve 8 abuts against the flange on the compression connecting sleeve 1101. The end of the solenoid valve abuts against the flange of the connecting sleeve, which can effectively improve the stability of the structure and the sealing of the oil circuit.

[0048] In a specific embodiment of the present invention, a platform is provided on the recovery intermediate cylinder 5 and the compression intermediate cylinder 6, respectively, and the end planes of the recovery end guide seat 10 and the compression end guide seat 12 are respectively in contact with the platforms on the recovery intermediate cylinder 5 and the compression intermediate cylinder 6. During manufacturing, the platform can be formed on the recovery intermediate cylinder 5 and the compression intermediate cylinder 6 by stamping, which is easy to manufacture. The recovery end guide seat 10 and the compression end guide seat 12 form a plane match with the platform, which has good stability and high reliability.

[0049] In a specific embodiment of the present invention, the end of the recovery end flow guide seat 10 is processed with a recovery end flow guide seat connecting ring 1001, and the recovery end flow guide seat connecting ring 1001 is assembled in the recovery middle cylinder flow guide hole; the end of the compression end flow guide seat 12 is provided with a compression end flow guide seat connecting ring 1201, and the compression end flow guide seat connecting ring 1201 is assembled in the compression middle cylinder flow guide hole. The connecting ring is inserted into the middle cylinder flow guide hole, so that the structure has strong integrity and good stability, and can also improve the sealing of the oil circuit to a certain extent.

[0050] In a specific embodiment of the present invention, a step is respectively provided on the outer diameter of the restoration passive valve seat 904 and the compression passive valve seat 1104, and the restoration end flow guide seat 10 and the compression end flow guide seat 12 are respectively in contact with the step surfaces on the outer diameters of the restoration passive valve seat 904 and the compression passive valve seat 1104. Thus, an axial limit is formed between the restoration end flow guide seat 10 and the restoration passive valve seat 904, and an axial limit is formed between the compression end flow guide seat 12 and the compression passive valve seat 1104, so that relative displacement will not occur due to oil impact, vibration, etc., and the reliability is high.

[0051] In a specific embodiment of the present invention, during assembly, the restoration passive valve 9 and the restoration end guide seat 10 are first pressed together to form an interference fit, and then pressed together with the restoration solenoid valve 7 to form an interference fit, to obtain a restoration damping regulating valve assembly (such as Figure 3 As shown), then install the restoring damping regulating valve assembly into the restoring electromagnetic valve seat 101; similarly, during assembly, first press fit the compression passive valve 11 and the compression end guide seat 12 to form an interference fit, and then press fit the compression electromagnetic valve 8 to form an interference fit, to obtain the compression damping regulating valve assembly (as shown). Figure 4 As shown in FIG. 1 ), the compression damping regulating valve assembly is then installed into the compression electromagnetic valve seat 102. In addition, in this embodiment, the assembly of other components of the shock absorber is the same as in the prior art. In this embodiment, the passive valve, the guide seat, and the electromagnetic valve are first pressed into the damping regulating valve assembly, and then the damping regulating valve assembly is integrally installed into the electromagnetic valve seat, which is easy to implement and conducive to industrialization.

[0052] In a specific embodiment of the present invention, the restoring electromagnetic valve 7 and the restoring electromagnetic valve seat 101 are fixedly connected by threads; the compression electromagnetic valve 8 and the compression electromagnetic valve seat 102 are fixedly connected by threads. During assembly, the electromagnetic valve and the electromagnetic valve seat are screwed together and tightened.

[0053] In a specific embodiment of the present invention, the recovery stroke and compression stroke of the shock absorber have four modes: soft mode, intermediate mode, hard mode and extreme pressure relief mode, so as to better meet the detailed requirements of the main engine manufacturer for the damping force under various oil flow rates.

[0054] In soft mode: in the recovery stroke, only the recovery solenoid valve 7 generates damping force, and the recovery passive valve 9 and the piston valve 3 are in a closed state; in the compression stroke, only the compression solenoid valve 8 generates damping force, and the compression passive valve 11 and the bottom valve 4 are in a closed state.

[0055] In the intermediate mode: in the recovery stroke, the recovery solenoid valve 7 and the recovery passive valve 9 generate damping force, and the piston valve 3 is in a closed state; in the compression stroke, the compression solenoid valve 8 and the compression passive valve 11 generate damping force, and the bottom valve 4 is in a closed state.

[0056] In hard mode: in the recovery stroke, only the recovery passive valve 9 generates damping force, and the recovery solenoid valve 7 and the piston valve 3 are in a closed state; in the compression stroke, only the compression passive valve 11 generates damping force, and the compression solenoid valve 8 and the bottom valve 4 are in a closed state.

[0057] In the extreme pressure relief mode: in the recovery stroke, the recovery solenoid valve 7, the recovery passive valve 9, and the piston valve 3 all generate damping force; in the compression stroke, the compression solenoid valve 8, the compression passive valve 11, and the bottom valve 4 all generate damping force.

[0058] The above general description of the invention involved in this application and the description of its specific embodiments should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and embodiments without violating the constituent elements of the invention involved, to form other technical solutions within the protection scope of this application.

Claims

1. A three-way damping adjustable dual external solenoid valve electrically controlled shock absorber, comprising an outer cylinder (1), an inner cylinder (2), a piston valve (3), a bottom valve (4), a restoring intermediate cylinder (5), a compression intermediate cylinder (6), a restoring solenoid valve (7) and a compression solenoid valve (8); the piston valve (3) is arranged in the inner cylinder (2) to divide the internal space of the inner cylinder (2) into an upper chamber and a lower chamber; the bottom valve (4) is interference-connected with the lower end of the inner cylinder (2); the restoring intermediate cylinder (5) and the compression intermediate cylinder (6) are sleeved outside the inner cylinder (2); the restoring intermediate cylinder (5) is connected to the upper chamber of the inner cylinder (2) through an upper guide hole (201) on the inner cylinder (2); the compression intermediate cylinder (6) is connected to the upper chamber of the inner cylinder (2) through an upper guide hole (201) on the inner cylinder (2); ) is connected to the lower chamber of the inner cylinder (2) through the lower guide hole (202) on the inner cylinder (2); the recovery intermediate cylinder (5) is provided with a recovery intermediate cylinder guide hole, the outer cylinder (1) is provided with a recovery electromagnetic valve seat (101), the recovery intermediate cylinder guide hole and the recovery electromagnetic valve seat (101) are coaxial, and the recovery electromagnetic valve (7) is installed in the recovery electromagnetic valve seat (101); the compression intermediate cylinder (6) is provided with a compression intermediate cylinder guide hole, the outer cylinder (1) is provided with a compression electromagnetic valve seat (102), the compression intermediate cylinder guide hole and the compression electromagnetic valve seat (102) are coaxial, and the compression electromagnetic valve (8) is installed in the compression electromagnetic valve seat (102); Features: The restoration intermediate cylinder (5) is provided with a restoration end flow guide seat (10) at the restoration intermediate cylinder flow guide hole; a restoration passive valve (9) is provided between the restoration solenoid valve (7) and the restoration end flow guide seat (10); the restoration passive valve (9) comprises a restoration connecting sleeve (901), on which a restoration solenoid valve connecting seat (902), a restoration damping valve plate (903), a restoration passive valve seat (904) and a restoration check valve assembly (905) are sequentially mounted; the restoration passive valve seat (904) The outer diameter of the restoration end flow guide seat (10) is interference-connected, and the restoration solenoid valve connection seat (902) is interference-connected with the outer diameter of the inlet end of the restoration solenoid valve (7); the restoration passive valve seat (904) is provided with a restoration damping channel and a compression compensation channel; the restoration damping valve plate (903) is used in conjunction with the restoration passive valve seat (904) to generate a damping force in the restoration stroke; the restoration check valve assembly (905) is used in conjunction with the restoration passive valve seat (904) to open in the compression stroke to form an oil compensation channel; A compression end flow guide seat (12) is provided on the compression intermediate cylinder (6) at the flow guide hole of the compression intermediate cylinder; a compression passive valve (11) is provided between the compression solenoid valve (8) and the compression end flow guide seat (12); the compression passive valve (11) comprises a compression connecting sleeve (1101), on which a compression solenoid valve connecting seat (1102), a compression damping valve plate (1103), a compression passive valve seat (1104) and a compression check valve assembly (1105) are sequentially mounted; the compression passive valve seat (110 4) is in interference connection with the compression end flow guide seat (12), and the compression solenoid valve connecting seat (1102) is in interference connection with the outer diameter of the inlet end of the compression solenoid valve (8); a compression damping channel and a recovery compensation channel are provided on the compression passive valve seat (1104); the compression damping valve plate (1103) is used in conjunction with the compression passive valve seat (1104) to generate a damping force during the compression stroke; the compression check valve assembly (1105) is used in conjunction with the compression passive valve seat (1104) to open during the recovery stroke to form an oil compensation channel.

2. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 1 is characterized in that: One end of the recovery connection sleeve (901) is provided with a step, and the other end is formed into a flange by riveting to press the parts sleeved on the outside thereof.

3. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 2 is characterized in that: The end plane of the restoration solenoid valve (7) abuts against the flange on the restoration connecting sleeve (901).

4. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 1 is characterized in that: One end of the compression connection sleeve (1101) is provided with a step, and the other end is formed into a flange by riveting, so as to press the parts sleeved on the outside thereof.

5. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 4 is characterized in that: The end plane of the compression solenoid valve (8) abuts against the flange on the compression connecting sleeve (1101).

6. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 1 is characterized in that: The recovery intermediate cylinder (5) and the compression intermediate cylinder (6) are respectively provided with a platform, and the end planes of the recovery end guide seat (10) and the compression end guide seat (12) are respectively in contact with the platforms on the recovery intermediate cylinder (5) and the compression intermediate cylinder (6).

7. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 1 is characterized in that: The end of the recovery end flow guide seat (10) is processed with a recovery end flow guide seat connecting ring (1001), and the recovery end flow guide seat connecting ring (1001) is assembled in the flow guide hole of the recovery middle cylinder; the end of the compression end flow guide seat (12) is provided with a compression end flow guide seat connecting ring (1201), and the compression end flow guide seat connecting ring (1201) is assembled in the flow guide hole of the compression middle cylinder.

8. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 1 is characterized in that: A step is respectively provided on the outer diameter of the restoration passive valve seat (904) and the compression passive valve seat (1104), and the restoration end flow guide seat (10) and the compression end flow guide seat (12) are respectively in contact with the step surfaces on the outer diameters of the restoration passive valve seat (904) and the compression passive valve seat (1104).

9. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 1, characterized in that: During assembly, the restoration passive valve (9) and the restoration end flow guide seat (10) are first pressed together to form an interference fit, and then pressed together with the restoration solenoid valve (7) to form an interference fit, thereby obtaining a restoration damping regulating valve assembly, and then installing the restoration damping regulating valve assembly into the restoration solenoid valve seat (101); similarly, during assembly, the compression passive valve (11) and the compression end flow guide seat (12) are first pressed together to form an interference fit, and then pressed together with the compression solenoid valve (8) to form an interference fit, thereby obtaining a compression damping regulating valve assembly, and then installing the compression damping regulating valve assembly into the compression solenoid valve seat (102).

10. The three-oil-circuit damping adjustable dual-external solenoid valve electronically controlled shock absorber according to claim 9, characterized in that: The restoring solenoid valve (7) and the restoring solenoid valve seat (101) are fixedly connected via threads; and the compression solenoid valve (8) and the compression solenoid valve seat (102) are fixedly connected via threads.

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