CN220828465U - Double-valve control type semi-active shock absorber - Google Patents

Abstract

The utility model relates to a double-valve control type semi-active shock absorber, which comprises the following components: the oil storage cylinder assembly, the connecting rod piston assembly, the cylinder barrel bottom valve assembly, the recovery electromagnetic valve and the compression electromagnetic valve are arranged in the cylinder barrel bottom valve assembly; the cylinder barrel bottom valve assembly is arranged in the oil storage barrel assembly; the cylinder barrel bottom valve assembly comprises a working cylinder, a middle cylinder assembly I and a middle cylinder assembly I I, wherein the outer wall of the working cylinder is sleeved with the middle cylinder assembly I and the middle cylinder assembly I I, an intermediate cavity I for controlling compression damping force is formed between the outer wall of the working cylinder and the middle cylinder assembly I, and an intermediate cavity I I for controlling restoring damping force is formed between the working cylinder and the middle cylinder assembly I I. The utility model has the beneficial effects that the middle cylinder component I is connected with the compression electromagnetic valve, the middle cylinder component I I is connected with the restoration electromagnetic valve, the throttling area of the oil liquid of the shock absorber is regulated and controlled, and the restoration damping force and the compression damping force of the shock absorber are independently regulated.

Description

Double-valve control type semi-active shock absorber

Technical Field

The utility model relates to the technical field of vibration absorbers, in particular to a double-valve control type semi-active vibration absorber.

Background

The shock absorber for an automobile is to provide riding comfort and steering stability, to keep a vehicle body stable by reducing vibration and jolt during running of the vehicle, and to provide good suspension control. With the continuous development of the automobile industry, semi-active vibration absorbers are widely used in suspension systems of vehicles. As a core component in an automobile suspension system, the performance of the shock absorber plays a very important role in the running safety and comfort of the automobile. The currently commonly used semi-active shock absorber is a single valve control type shock absorber, the damping characteristic of the shock absorber can be adjusted timely according to road conditions, but the restoring damping force and the compression damping force of the shock absorber cannot be controlled separately, the variable range of the compression damping force is smaller, and the damping force requirement of the semi-active shock absorber in the current automobile factory cannot be met.

Disclosure of utility model

The utility model aims to provide a double-valve control type semi-active shock absorber, which solves the problems mentioned in the background art.

The technical scheme for solving the technical problems is as follows: a dual valve controlled semi-active shock absorber comprising: the oil storage cylinder assembly, the connecting rod piston assembly, the cylinder barrel bottom valve assembly, the recovery electromagnetic valve and the compression electromagnetic valve are arranged in the cylinder barrel bottom valve assembly and are matched with the cylinder barrel bottom valve assembly; the cylinder barrel bottom valve assembly is arranged in the oil storage barrel assembly;

The cylinder barrel bottom valve assembly comprises a working cylinder, a middle cylinder assembly I and a middle cylinder assembly I I, wherein the outer wall of the working cylinder is sleeved with the middle cylinder assembly I and the middle cylinder assembly I I, an intermediate cavity I for controlling compression damping force is formed between the outer wall of the working cylinder and the middle cylinder assembly I, and an intermediate cavity I I for controlling restoring damping force is formed between the working cylinder and the middle cylinder assembly I I;

A working cavity is formed in the working cylinder, a working upper cavity and a working lower cavity are formed after the working cylinder is matched with the connecting rod piston assembly, the middle cavity I is communicated with the working lower cavity, and the middle cavity I I is communicated with the working upper cavity;

The restoring electromagnetic valve and the compression electromagnetic valve are arranged on the outer wall of the oil storage cylinder assembly at intervals, the restoring electromagnetic valve and the compression electromagnetic valve are respectively communicated with the inner cavity of the oil storage cylinder assembly and the inner cavity of the cylinder barrel bottom valve assembly, and respectively form a first oil way communicated with the working lower cavity, the middle cavity I, the compression electromagnetic valve and the inner cavity of the oil storage cylinder assembly, a second oil way communicated with the working upper cavity, the middle cavity I I, the restoring electromagnetic valve and the inner cavity of the oil storage cylinder assembly, and a third oil way communicated with the inner cavity of the oil storage cylinder assembly and the middle cavity I I, and the connecting rod piston assembly moves upwards or downwards to drive oil to enter different oil ways.

The beneficial effects of the utility model are as follows: the middle cylinder component I is connected with the compression electromagnetic valve, the middle cylinder component I I is connected with the restoration electromagnetic valve, the throttling area of the oil liquid of the shock absorber is adjusted and controlled, the independent adjustment of the restoration damping force and the compression damping force of the shock absorber is realized, the adjustment range of the compression damping force is enlarged, and the variable performance of the damping force of the shock absorber is improved. The size of the input current of the restoration electromagnetic valve is changed, so that the throttling area of the electromagnetic valve to oil is changed, and the continuous regulation and control of the restoration damping force of the shock absorber are realized; the input current of the compression electromagnetic valve is changed, so that the throttling area of the electromagnetic valve to oil is changed, and the continuous adjustment control of the compression damping force of the shock absorber is realized.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the oil storage cartridge assembly includes: the oil storage cylinder, the electromagnetic valve seat and the bottom valve seat form an oil storage cavity between the oil storage cylinder and the cylinder bottom valve assembly; the bottom valve seat is connected with the cylinder bottom valve assembly;

The electromagnetic valve seats are at least two, the adjacent electromagnetic valve seats are connected to the outer wall of the oil storage cylinder at intervals, the recovery electromagnetic valve is arranged in at least one electromagnetic valve seat, and the compression electromagnetic valve is arranged in at least one electromagnetic valve seat.

The beneficial effects of adopting the further scheme are as follows: the electromagnetic valve seat is used for installing the recovery electromagnetic valve and the compression electromagnetic valve, so that the oil storage cavity is communicated with the recovery electromagnetic valve and the compression electromagnetic valve respectively.

Further, the cylinder bottom valve assembly further comprises a bottom valve assembly connected to the bottom valve seat.

The beneficial effects of adopting the further scheme are as follows: connection to the base valve seat is achieved through the base valve assembly.

Further, a plurality of first overflow holes are circumferentially distributed on the outer wall of the lower end of the working cylinder, a plurality of second overflow holes are circumferentially distributed on the outer wall of the upper end of the working cylinder, and the first overflow holes and the second overflow holes are not arranged on the same axial surface;

The height difference between the adjacent first overflow holes is the radius value of the first overflow holes, and the height difference between the adjacent second overflow holes is the radius value of the second overflow holes;

The middle cavity I is communicated with the working lower cavity through the first overflow hole at the lower end of the working cylinder, and the middle cavity I I is communicated with the working upper cavity through the second overflow hole at the upper end of the working cylinder.

The beneficial effects of adopting the further scheme are as follows: in order to ensure the structural strength of the working cylinder, the first overflow hole and the second overflow hole are not arranged on the same axial plane; during the working process of the shock absorber, the working stroke of the connecting rod piston assembly is required to be between the first overflow hole and the second overflow hole of the working cylinder, otherwise, the piston can leak after contacting with the overflow hole, and the shock absorber can have a failure risk.

Further, the middle tube assembly I includes: the sealing device comprises a sealing ring, a middle cylinder end cover, a middle cylinder I and a sealing seat, wherein the two ends of the middle cylinder I are respectively provided with the middle cylinder end cover; the sealing ring is arranged in a groove of the middle cylinder I end cover;

The sealing seat is connected with the outer wall of the middle cylinder I and is communicated with the inner cavity of the middle cylinder I, and the sealing seat is used for being connected with the compression electromagnetic valve.

The beneficial effects of adopting the further scheme are as follows: the oil in the working lower cavity enters the middle cavity I through the first overflow hole, then enters the compression electromagnetic valve through the first oil inlet hole, finally returns to the oil storage cavity through the first oil outlet hole, the first oil outlet hole is arranged on the compression electromagnetic valve, the oil channel is the first oil way I, the compression electromagnetic valve is used for independently controlling the compression damping force, the adjustment range of the compression damping force is effectively enlarged, and the vehicle comfort is improved.

Further, the middle tube assembly I I includes: the sealing ring, the middle cylinder end cover, the middle cylinder I I and the sealing seat are arranged at one end of the middle cylinder I I, which is close to the connecting rod piston assembly; the sealing ring is arranged in the groove of the middle cylinder end cover;

The sealing seat is connected with the outer wall of the middle cylinder I I and is communicated with the inner cavity of the middle cylinder I I, and the sealing seat is used for being connected with the recovery electromagnetic valve.

The beneficial effects of adopting the further scheme are as follows: the oil in the upper working cavity enters the middle cavity I I through the second overflow hole, then enters the restoration electromagnetic valve through the second oil inlet hole, finally returns to the oil storage cavity through the second oil outlet hole, the second oil outlet hole is arranged on the restoration electromagnetic valve, the oil channel is a second oil channel I I, and the restoration electromagnetic valve is an oil channel for independently controlling restoration damping force.

Further, the middle tube assembly I I further includes: the middle cylinder fixing seat, the wave-shaped elastic gasket, the flat gasket and the middle cylinder press-fit cover are arranged on the middle cylinder, and one end, away from the middle cylinder end cover, of the middle cylinder I I is connected with the middle cylinder fixing seat; the middle cylinder press-fit cover is arranged at the end part of the middle cylinder fixing seat, which is away from one end of the middle cylinder I I;

The wave-shaped elastic gasket and the flat gasket are sequentially arranged in the middle cylinder press-fit cover, and the wave-shaped elastic gasket is arranged between the flat gasket and the end face of the middle cylinder fixing seat to form a one-way valve structure;

The check valve structure is normally closed, and when the pressure of the oil storage cavity is greater than that of the middle cavity I I, oil flows into the middle cavity I I from the oil storage cavity to perform oil compensation.

The beneficial effects of adopting the further scheme are as follows: the wave-shaped elastic gasket and the flat gasket are assembled and installed in the middle cylinder press-fit cover, the flat gasket is close to one end of the middle cylinder press-fit cover, which is close to the middle cylinder fixing seat, the wave-shaped elastic gasket is arranged between the flat gasket and the end face of the middle cylinder fixing seat, so that a one-way valve structure is formed, the one-way valve structure is in a normally closed state, when the pressure of an oil storage cavity is higher than that of a middle cavity II, the one-way valve structure is opened to form a third oil way III, oil flows into the middle cavity II from the oil storage cavity through a third oil inlet channel to perform oil compensation, and the third oil inlet channel can be formed by annular grooves or holes uniformly distributed on the middle cylinder press-fit cover on the circumference.

The one-way valve structure of the middle cylinder assembly II can enable oil in the oil storage cavity to flow into the middle cavity II and return to the working upper cavity, so that pressure among cavities in the shock absorber is effectively balanced.

Further, the connecting rod piston assembly includes: the oil seal, the uide bushing subassembly, link assembly and piston subassembly, the oil seal the uide bushing subassembly with install after the link assembly cooperation oil storage section of thick bamboo upper end, the piston subassembly set up in link assembly lower extreme.

The beneficial effects of adopting the further scheme are as follows: the connecting rod piston assembly is connected and assembled and then is matched with the oil storage cylinder and the working cylinder.

Further, the restoration electromagnetic valve is arranged in the electromagnetic valve seat, the restoration electromagnetic valve is connected with the sealing seat on the middle cylinder assembly II, and oil in the upper working cavity enters the restoration electromagnetic valve through the middle cavity II.

The beneficial effects of adopting the further scheme are as follows: the restoration electromagnetic valve is connected with the sealing seat on the middle cylinder assembly II, so that oil in the upper working cavity enters the restoration electromagnetic valve through the middle cavity II, and the restoration damping force of the shock absorber is independently controlled and adjusted by changing the size of input current and adjusting the throttling area of the oil.

Further, the compression solenoid valve is arranged in the solenoid valve seat, the compression solenoid valve is connected with the sealing seat on the middle cylinder assembly I, and oil in the working lower cavity enters the compression solenoid valve through the middle cavity I.

The beneficial effects of adopting the further scheme are as follows: the compression electromagnetic valve is connected with the sealing seat on the middle cylinder assembly I, so that working lower cavity oil enters the compression electromagnetic valve through the middle cavity I, and the throttle area of the oil is adjusted by changing the input current, so that the compression damping force of the shock absorber is independently controlled and adjusted.

Drawings

FIG. 1 is a schematic diagram of a shock absorber according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a cylinder in accordance with one embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a cylinder at section A in one embodiment of the utility model;

FIG. 4 is a schematic view of a second middle barrel assembly according to an embodiment of the present utility model;

FIG. 5 is a front view of a middle cartridge press-fit end cap in accordance with one embodiment of the present utility model;

FIG. 6 is a cross-sectional view at section B of a middle barrel press fit end cap in one embodiment of the utility model;

fig. 7 is an enlarged schematic view at C in fig. 6.

In the drawings, the list of components represented by the various numbers is as follows:

001. The oil storage cylinder assembly, 002, the connecting rod piston assembly, 003, the cylinder bottom valve assembly, 004, the restoring electromagnetic valve, the 005 compression electromagnetic valve, 101, the oil storage cylinder, 102, the electromagnetic valve seat, 103, the bottom valve seat, 100, the bottom valve assembly, 200, the middle cylinder assembly I,300, the middle cylinder assembly II,400, the piston assembly, 201, the working cylinder, 202, the sealing ring, 203, the middle cylinder I,204, the sealing seat, 301, the middle cylinder end cover, 302, the middle cylinder II,303, the middle cylinder fixing seat, 304, the wave-shaped elastic gasket, 305, the flat gasket, 306, the middle cylinder press-fit end cover, 401, the first overflow hole, 402, the first oil inlet hole, 403, the first oil outlet hole, 404, the second overflow hole, 405, the second oil inlet hole, 406, the second oil outlet hole, 407, the third oil inlet channel, 408, the press-fit face, 409, the third sealing face, 501, the oil storage cavity, 502, the working cavity, 503, the upper working cavity, 504, the lower working cavity, 505, the middle cavity I,506, the middle cavity II, I, the first oil path, the second oil path, the third oil path III, and the third oil path.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

In one embodiment of the present utility model, as shown in FIG. 1, a dual valve controlled semi-active shock absorber comprises: the oil storage cylinder assembly 001, the connecting rod piston assembly 002, the cylinder barrel bottom valve assembly 003, the recovery electromagnetic valve 004 and the compression electromagnetic valve 005 are all arranged in the oil storage cylinder assembly 001, the connecting rod piston assembly 002 is arranged in the cylinder barrel bottom valve assembly 003 and matched with the cylinder barrel bottom valve assembly 003, the recovery electromagnetic valve 004 and the compression electromagnetic valve 005 are arranged on the outer wall of the oil storage cylinder assembly 001 at intervals, and the recovery electromagnetic valve 004 and the compression electromagnetic valve 005 are respectively communicated with the inner cavity of the oil storage cylinder assembly 001 and the inner cavity of the cylinder barrel bottom valve assembly 003.

The cylinder barrel bottom valve assembly 003 comprises a working cylinder 201, a middle cylinder assembly I200 and a middle cylinder assembly II300, wherein the middle cylinder assembly I200 and the middle cylinder assembly II300 are sleeved on the outer wall of the working cylinder 201, the inner cavity of the middle cylinder assembly I200 is communicated with the inner cavity of the working cylinder 201, an intermediate cavity I505 for controlling compression damping force is formed between the outer wall of the working cylinder 201 and the middle cylinder assembly I200, the inner cavity of the middle cylinder assembly II300 is communicated with the working cylinder 201, and an intermediate cavity II506 for controlling restoring damping force is formed between the outer wall of the working cylinder 201 and the middle cylinder assembly II 300.

A working chamber 502 is formed in the working cylinder 201, an upper working chamber 503 and a lower working chamber 504 are formed after the working cylinder 201 is matched with the connecting rod piston assembly 002, an intermediate chamber I505 is communicated with the lower working chamber 504, and an intermediate chamber II506 is communicated with the upper working chamber 503.

The restoring electromagnetic valve 004 and the compressing electromagnetic valve 005 are respectively communicated with the inner cavity of the oil storage barrel assembly 001 and the cylinder barrel bottom valve assembly 003, and respectively form a first oil way I communicated with the working lower cavity 504, the middle cavity I505, the compressing electromagnetic valve 005 and the inner cavity of the oil storage barrel assembly 001, a second oil way II communicated with the working upper cavity 503, the middle cavity II506, the restoring electromagnetic valve 004 and the inner cavity of the oil storage barrel assembly 001 and a third oil way III communicated with the inner cavity of the oil storage barrel assembly 001 and the middle cavity II506, and in the working process of the shock absorber, oil is driven to enter different oil ways according to upward or downward movement of the connecting rod piston assembly 002.

In the scheme, the compression electromagnetic valve 005 is connected through the middle cylinder assembly I200, the middle cylinder assembly II300 is connected with the restoration electromagnetic valve 004, the throttling area of the shock absorber oil liquid is adjusted and controlled, the independent adjustment of the restoration damping force and the compression damping force of the shock absorber is realized, the adjustment range of the compression damping force is enlarged, and the variable performance of the damping force of the shock absorber is improved. The size of the input current of the restoration electromagnetic valve is changed, so that the throttling area of the electromagnetic valve to oil is changed, and the continuous regulation and control of the restoration damping force of the shock absorber are realized; the input current of the compression electromagnetic valve is changed, so that the throttling area of the electromagnetic valve to oil is changed, and the continuous adjustment control of the compression damping force of the shock absorber is realized.

As shown in fig. 1, in a preferred embodiment, the oil reservoir assembly 001 includes: the oil storage cylinder 101, the electromagnetic valve seat 102 and the bottom valve seat 103 form an oil storage cavity 501 between the oil storage cylinder 101 and the cylinder bottom valve assembly 003, bubbles are arranged in the oil storage cavity 501 and are away from the upper side of the bottom valve seat 103, and oil is arranged below the bubbles. The bottom valve seat 103 is provided at the bottom of the oil reservoir 101 and is connected to the cylinder bottom valve assembly 003.

At least two electromagnetic valve seats 102 are arranged, at least two electromagnetic valve seats 102 are arranged on the outer wall of the oil storage cylinder 101 at intervals and are communicated with the oil storage cavity 501 inside, a restoring electromagnetic valve 004 is arranged inside at least one electromagnetic valve seat 102, and a compression electromagnetic valve 005 is arranged inside at least one electromagnetic valve seat 102.

In this embodiment, two solenoid valve seats 102 are provided in total, a compression solenoid valve 005 is provided in the solenoid valve seat 102 near the bottom of the oil reservoir 101, and a recovery solenoid valve 004 is provided in the solenoid valve seat 102 away from the bottom of the oil reservoir 101.

In the above-described embodiment, the solenoid valve seat 102 allows the recovery solenoid valve 004 and the compression solenoid valve 005 to be attached, and the oil storage chamber 501 communicates with the recovery solenoid valve 004 and the compression solenoid valve 005, respectively.

In a preferred embodiment, as shown in fig. 1, the cylinder bottom valve assembly 003 further includes a bottom valve assembly 100, and as shown in fig. 1, the bottom valve assembly 100 is connected to a bottom valve seat 103, and the bottom valve assembly 100 is disposed at the bottom of the working cylinder 201.

In the above-described aspects, the connection with the base valve seat 103 is achieved by the base valve assembly 100.

As shown in fig. 1-3, in a preferred scheme, a plurality of first overflow holes 401 are circumferentially distributed on one end, close to the base valve assembly 100, of the working cylinder 201, namely, on the outer wall of the lower end of the working cylinder 201, wherein two first overflow holes 401 are in a group, and are arranged in a staggered manner on the outer wall of the working cylinder 201 along the axial direction; a plurality of second overflow holes 404 are circumferentially distributed at one end of the working cylinder 201, which is away from the base valve assembly 100, i.e. at the outer wall of the upper end of the working cylinder 201, wherein two second overflow holes 404 are arranged as a group, and are arranged in a staggered manner along the axial direction at the outer wall of the working cylinder 201.

In this embodiment, 4 first overflow holes 401 and 4 second overflow holes 404 are respectively provided, the first overflow holes 401 and the second overflow holes 404 are uniformly distributed at an angle, wherein a radius of one first overflow hole 401 is offset between two adjacent first overflow holes 401, and a radius of one second overflow hole 404 is offset between two adjacent second overflow holes 404. In order to ensure the structural strength of the working cylinder, the first overflow hole 401 and the second overflow hole 404 are not arranged on the same axial surface, i.e. the center of the second overflow hole 404 is not arranged in line with the center of the first overflow hole 401.

The number of the first overflow holes 401 and the second overflow holes 404 is limited to 4, so that the problem of insufficient rigidity due to the need to increase the pore diameter when the number is increased and the whole rigidity is reduced due to the increase of the number are prevented.

The working cylinder 201 and the connecting rod piston assembly 002 cooperate to form an upper working chamber 503 and a lower working chamber 504, and specifically, the piston assembly 400 divides the working chamber into the upper working chamber 503 and the lower working chamber 504, and the middle chamber I505 communicates with the lower working chamber 504 through the first overflow hole 401 at the lower end of the working cylinder 201. The intermediate chamber I I506,506 communicates with the upper working chamber 503 through the second overflow aperture 404 in the upper end of the working cylinder 201.

In the above scheme, in order to ensure the structural strength of the working cylinder, the first overflow hole 401 and the second overflow hole 404 are not arranged on the same axial plane; during operation of the shock absorber, the working stroke of the connecting rod piston assembly 002 must be between the first and second overflow holes 401 and 404 of the working cylinder 201, otherwise the piston will leak after contact with the overflow holes, and the shock absorber will be at risk of failure.

As shown in fig. 1, in a preferred embodiment, the middle barrel assembly I200 includes: the sealing ring 202, the middle cylinder end cover 301, the middle cylinder I203 and the sealing seat 204 are arranged in the groove of the middle cylinder end cover 301, and two ends of the middle cylinder I203 are respectively provided with one middle cylinder end cover 301; the sealing seat 204 is connected with the outer wall of the middle cylinder I203 and is communicated with the inner cavity of the middle cylinder I203, and the sealing seat 204 is used for connecting the compression electromagnetic valve 005 and is used as an oil inlet channel thereof to form a first oil inlet hole; in a specific installation process, the sealing seat 204 is welded with the middle cylinder I203.

In the above scheme, the oil in the working lower cavity 504 enters the middle cavity I505 through the first overflow hole 401, then enters the compression electromagnetic valve 005 through the first oil inlet hole, finally returns to the oil storage cavity 501 through the first oil outlet hole 403, the first oil outlet hole 403 is arranged on the compression electromagnetic valve 005, the oil channel is the first oil channel I, and the compression electromagnetic valve 005 independently controls the oil channel of the compression damping force, so that the adjustment range of the compression damping force is effectively enlarged, and the vehicle comfort is improved.

As shown in fig. 4, in a preferred embodiment, the middle barrel assembly II300 includes: the sealing ring 202, the middle cylinder end cover 301, the middle cylinder II302 and the sealing seat 204 are arranged in a groove of the middle cylinder end cover 301, and the middle cylinder end cover 301 is arranged at one end of the middle cylinder II302, which is close to the connecting rod piston assembly 002; the sealing seat 204 is connected with the outer wall of the middle cylinder II302 and is communicated with the inner cavity of the middle cylinder II302, and the sealing seat 204 is used for being connected with the recovery electromagnetic valve 004 to serve as an oil inlet channel of the recovery electromagnetic valve 004, so that a second oil inlet hole 405 is formed.

In the above scheme, the oil in the working upper cavity 503 enters the intermediate cavity II506 through the second overflow hole 404, then enters the recovery electromagnetic valve 004 through the second oil inlet hole 405, finally returns to the oil storage cavity 501 through the second oil outlet hole 406, the second oil outlet hole 406 is disposed on the recovery electromagnetic valve 004, and this oil channel is the second oil channel II, which is the oil channel for the recovery electromagnetic valve 004 to independently control the recovery damping force.

As shown in fig. 4-7, in a preferred embodiment, the middle barrel assembly II300 further comprises: the middle cylinder fixing seat 303, the wave-shaped elastic gasket 304, the flat gasket 305 and the middle cylinder press-fit cover 306 are arranged at one end of the middle cylinder II302, which is away from the middle cylinder end cover 301, and in the specific installation process, the middle cylinder fixing seat 303 is welded with the middle cylinder II302 and in interference fit; the middle cylinder press-fit cover 306 is arranged at the end part of the middle cylinder fixing seat 303, the wave-shaped elastic gasket 304 and the flat gasket 305 are assembled and installed in the middle cylinder press-fit cover 306, the middle cylinder fixing seat 303 is in interference fit with the press-fit surface 408 of the middle cylinder press-fit end cover 306, then welding connection is carried out, the flat gasket 305 is close to one end of the middle cylinder press-fit cover 306, which is close to the middle cylinder fixing seat 303, the flat gasket 305 is matched with the third sealing surface 409, the wave-shaped elastic gasket 304 is arranged between the flat gasket 305 and the end surface of the middle cylinder fixing seat 303, so that a one-way valve structure is formed, the one-way valve structure is in a normally closed state, when the pressure of the oil storage cavity 501 is higher than that of the middle cavity II506, the one-way valve structure is opened to form a third oil path III, and oil flows into the middle cavity II506 from the oil storage cavity 501 to compensate oil.

In the above-mentioned scheme, by assembling the wave-shaped elastic washer 304 and the flat washer 305 in the middle cylinder press-fit cap 306, the flat washer 305 is close to one end of the middle cylinder press-fit cap 306 close to the middle cylinder fixing seat 303, the wave-shaped elastic washer 304 is interposed between the flat washer 305 and the end surface of the middle cylinder fixing seat 303, so as to form a one-way valve structure, the one-way valve structure is in a normally closed state, when the pressure of the oil storage cavity 501 is greater than that of the middle cavity II506, the one-way valve structure is opened to form a third oil path III, and oil flows from the oil storage cavity 501 into the middle cavity II506 through the third oil inlet channel 407 for oil compensation, wherein the third oil inlet channel 407 may be formed by annular grooves or holes uniformly arranged on the circumference of the middle cylinder press-fit cap 306.

The one-way valve structure of the middle cylinder assembly II300 can enable oil in the oil storage cavity 501 to flow into the middle cavity II506 and return to the working upper cavity 503, so that pressure among cavities in the shock absorber is effectively balanced.

As shown in fig. 1, in a preferred embodiment, a connecting rod piston assembly 002 is disposed in a working cylinder 201, the connecting rod piston assembly 002 includes an oil seal, a guide sleeve assembly, a connecting rod assembly and a piston assembly 400, a closing-in gasket, the oil seal, the guide sleeve assembly and the connecting rod assembly are assembled and then mounted at the upper end of an oil storage cylinder 101, and the piston assembly 400 is mounted at the lower end of the connecting rod assembly. In this embodiment, the connecting rod piston assembly 002 is common in the industry and will not be described here.

In the above-described embodiment, the connecting rod piston assembly 002 is connected and assembled to the oil reservoir 101 and the cylinder 201.

In the preferred embodiment, as shown in fig. 1, a recovery solenoid valve 004 is mounted in the solenoid valve seat 102, the recovery solenoid valve 004 is connected to a seal seat 204 on the middle cylinder assembly II300, and oil in the upper working chamber 503 enters the recovery solenoid valve 004 through the middle chamber II 506.

In the above scheme, the restoration electromagnetic valve 004 is connected with the sealing seat 204 on the middle cylinder assembly II300, so that the oil in the upper working cavity 503 enters the restoration electromagnetic valve 004 through the middle cavity II506, and the restoration damping force of the shock absorber is independently controlled and adjusted by changing the input current and adjusting the throttling area of the oil.

In a preferred embodiment, as shown in FIG. 1, a compression solenoid valve 005 is mounted within the solenoid valve seat 102, the compression solenoid valve 005 being connected to the seal seat 204 on the cartridge assembly I200, and the working lower chamber 504 being filled with oil through the intermediate chamber I505 into the compression solenoid valve 005.

In the above scheme, the compression electromagnetic valve 005 is connected with the sealing seat 204 on the middle cylinder assembly I200, so that the oil in the working lower cavity 504 enters the compression electromagnetic valve 005 through the middle cavity I505, and the throttle area of the oil is adjusted by changing the input current, so that the compression damping force of the shock absorber is independently controlled and adjusted.

The working process of the utility model is as follows:

When the shock absorber stretches, the connecting rod piston assembly 002 moves upwards, the volume of the working upper cavity 503 is reduced, and oil in the working upper cavity 503 flows into the working lower cavity 504 through the piston assembly 400; because of the existence of the connecting rod in the working upper cavity 503, the oil flowing into the working upper cavity 503 is insufficient to fill the increased volume of the working lower cavity 504, and under the action of pressure difference, the oil in the oil storage cavity 501 flows into the working lower cavity 504 through the base valve assembly 100; the oil in the upper working chamber 503 flows into the recovery solenoid valve 004 through the second oil passage II and returns to the oil storage chamber 501, and when the pressure in the oil storage chamber 501 is greater than that in the upper working chamber 503, the oil flows from the oil storage chamber 501 through the third oil passage III into the intermediate chamber II506.

When the shock absorber is compressed, the connecting rod piston assembly 002 moves downwards, the volume of the working lower cavity 504 is reduced, oil in the working lower cavity 504 flows into the working upper cavity 503, the volume increased by the working upper cavity 503 is smaller than the volume reduced by the working lower cavity 504 due to the existence of the connecting rod in the working upper cavity 503, a part of oil flows into the oil storage cavity 501 through the base valve assembly 100, a part of oil flows into the compression electromagnetic valve 005 through the first oil path I and returns to the oil storage cavity 501, and a part of oil enters the working upper cavity 503.

The continuous regulation control of the restoration damping force of the shock absorber is realized by changing the input current of the restoration electromagnetic valve 004 so as to change the throttling area of the electromagnetic valve on oil liquid; the input current of the compression electromagnetic valve 005 is changed, so that the throttling area of the electromagnetic valve to oil is changed, and the continuous adjustment control of the compression damping force of the shock absorber is realized.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A dual valve controlled semi-active shock absorber comprising: the oil storage cylinder assembly (001), a connecting rod piston assembly (002), a cylinder barrel bottom valve assembly (003), a recovery electromagnetic valve (004) and a compression electromagnetic valve (005) are characterized in that the connecting rod piston assembly (002) is arranged in the cylinder barrel bottom valve assembly (003) and is matched with the cylinder barrel bottom valve assembly (003); the cylinder barrel bottom valve assembly (003) is arranged in the oil storage cylinder assembly (001);

The cylinder barrel bottom valve assembly (003) comprises a working cylinder (201), a middle cylinder assembly I (200) and a middle cylinder assembly II (300), wherein the middle cylinder assembly I (200) and the middle cylinder assembly I I (300) are sleeved on the outer wall of the working cylinder (201), an intermediate cavity I (505) for controlling compression damping force is formed between the outer wall of the working cylinder (201) and the middle cylinder assembly I (200), and an intermediate cavity II (506) for controlling restoration damping force is formed between the working cylinder (201) and the middle cylinder assembly II (300);

A working cavity (502) is formed in the working cylinder (201), a working upper cavity (503) and a working lower cavity (504) are formed after the working cylinder (201) is matched with the connecting rod piston assembly (002), the middle cavity I (505) is communicated with the working lower cavity (504), and the middle cavity II (506) is communicated with the working upper cavity (503);

The oil storage cylinder assembly comprises an oil storage cylinder assembly (001), a compression electromagnetic valve (005), a restoration electromagnetic valve (004), a cylinder barrel bottom valve assembly (003) and a connecting rod piston assembly (002), wherein the restoration electromagnetic valve (004) and the compression electromagnetic valve (005) are arranged on the outer wall of the oil storage cylinder assembly (001) at intervals, the restoration electromagnetic valve (004) and the compression electromagnetic valve (005) are respectively communicated with the inner cavity of the oil storage cylinder assembly (001) and the inner cavity of the cylinder barrel bottom valve assembly (003), a first oil way communicated with the working lower cavity (504), a middle cavity I (505) and the inner cavity of the oil storage cylinder assembly (001) is respectively formed, a second oil way communicated with the working upper cavity (503) and the middle cavity I I (506), a second oil way communicated with the inner cavity of the oil storage cylinder assembly (001) and a third oil way communicated with the middle cavity II (506) are respectively, and oil is driven to enter different oil ways according to upward or downward movement of the connecting rod piston assembly (002).

2. The dual valve controlled semi-active shock absorber of claim 1, wherein said reservoir assembly (001) comprises: an oil storage cylinder (101), an electromagnetic valve seat (102) and a bottom valve seat (103), wherein an oil storage cavity (501) is formed between the oil storage cylinder (101) and the cylinder bottom valve assembly (003); the base valve seat (103) is connected with the cylinder barrel base valve assembly (003);

The electromagnetic valve seats (102) are at least provided with two, adjacent electromagnetic valve seats (102) are connected to the outer wall of the oil storage cylinder (101) at intervals, at least one electromagnetic valve seat (102) is internally provided with the recovery electromagnetic valve (004), and at least one electromagnetic valve seat (102) is internally provided with the compression electromagnetic valve (005).

3. The dual valve controlled semi-active shock absorber according to claim 2, wherein said cylinder base valve assembly (003) further comprises a base valve assembly (100), said base valve assembly (100) being connected to said base valve seat (103).

4. A double-valve-control type semi-active shock absorber according to claim 3, wherein a plurality of first overflow holes (401) are circumferentially arranged on the outer wall of the lower end of the working cylinder (201), a plurality of second overflow holes (404) are circumferentially arranged on the outer wall of the upper end of the working cylinder (201), and the first overflow holes (401) and the second overflow holes (404) are not arranged on the same axial plane;

The height difference between the adjacent first overflow holes (401) is the radius value of the first overflow holes (401), and the height difference between the adjacent second overflow holes (404) is the radius value of the second overflow holes (404);

The middle cavity I (505) is communicated with the working lower cavity (504) through the first overflow hole (401) at the lower end of the working cylinder (201), and the middle cavity II (506) is communicated with the working upper cavity (503) through the second overflow hole (404) at the upper end of the working cylinder (201).

5. The dual valve controlled semi-active shock absorber according to claim 4, wherein said middle tube assembly I (200) comprises: the sealing device comprises a sealing ring (202), a middle cylinder end cover (301), a middle cylinder I (203) and a sealing seat (204), wherein the two ends of the middle cylinder I (203) are respectively provided with the middle cylinder end cover (301); the sealing ring (202) is arranged in a groove of the end cover of the middle cylinder I (203);

the sealing seat (204) is connected with the outer wall of the middle cylinder I (203) and is communicated with the inner cavity of the middle cylinder I (203), and the sealing seat (204) is used for being connected with the compression electromagnetic valve (005).

6. The dual valve controlled semi-active shock absorber according to claim 4, wherein said middle tube assembly II (300) comprises: the sealing ring (202), a middle cylinder end cover (301), a middle cylinder II (302) and a sealing seat (204), wherein the middle cylinder end cover (301) is arranged at one end of the middle cylinder II (302) close to the connecting rod piston assembly (002); the sealing ring (202) is arranged in a groove of the middle cylinder end cover (301);

The sealing seat (204) is connected with the outer wall of the middle cylinder I I (302) and is communicated with the inner cavity of the middle cylinder I I (302), and the sealing seat (204) is used for being connected with the recovery electromagnetic valve (004).

7. The dual valve controlled semi-active shock absorber according to claim 6, wherein said middle tube assembly II (300) further comprises: the middle cylinder II (302) is connected with the middle cylinder fixing seat (303) at one end away from the middle cylinder end cover (301); the middle cylinder press-fit cover (306) is arranged at the end part of the middle cylinder fixing seat (303) deviating from one end of the middle cylinder II (302);

The wave-shaped elastic gasket (304) and the flat gasket (305) are sequentially arranged in the middle cylinder press-fit cover (306), and the wave-shaped elastic gasket (304) is arranged between the flat gasket (305) and the end face of the middle cylinder fixing seat (303) to form a one-way valve structure;

The one-way valve structure is normally closed, and when the pressure of the oil storage cavity (501) is higher than that of the intermediate cavity I I (506), oil flows into the intermediate cavity II (506) from the oil storage cavity (501) to perform oil compensation.

8. A double valve controlled semi-active shock absorber according to claim 2, wherein the connecting rod piston assembly (002) comprises: the oil seal, the guide sleeve assembly, the connecting rod assembly and the piston assembly (400), the oil seal, the guide sleeve assembly and the connecting rod assembly are installed at the upper end of the oil storage cylinder (101) after being matched, and the piston assembly (400) is arranged at the lower end of the connecting rod assembly.

9. The dual valve controlled semi-active shock absorber according to any of claims 5-7, wherein said recovery solenoid valve (004) is disposed within said solenoid valve seat (102), said recovery solenoid valve (004) is connected to said seal seat (204) on said middle cylinder assembly II (300), and oil in said upper working chamber (503) enters said recovery solenoid valve (004) through said middle chamber II (506).

10. The dual valve controlled semi-active shock absorber according to any of claims 5-7, wherein said compression solenoid valve (005) is disposed within said solenoid valve seat (102), said compression solenoid valve (005) is connected to said seal seat (204) on said middle cylinder assembly I (200), and said working lower chamber (504) oil enters said compression solenoid valve (005) through said middle chamber I (505).