Double external solenoid valve type electronically controlled shock absorber with external filtering device

Abstract

The present invention discloses a dual external solenoid valve type electronically controlled shock absorber with an external filtering device. Different from the existing dual external solenoid valve type electronically controlled shock absorber, the dual external solenoid valve type electronically controlled shock absorber of the present invention is provided with a filtering device on the liquid storage cylinder, and the filtering device is interconnected with the leakage chamber between the working cylinder and the intermediate cylinder through a pipeline, and the filtering device is provided with a filtering core and a filtering oil circuit damping valve. The present invention allows part of the oil to enter the filtering device through a special oil circuit design, and removes impurities in the oil through the filtering device, thereby avoiding the phenomenon that the shock absorber performance is reduced or even damaged due to the accumulation of impurities, thereby extending the service life of the shock absorber and reducing the cost of repair and maintenance. At the same time, since the filtering device is provided with a filtering oil circuit damping valve, the shock absorber has an additional damping oil circuit, which is more adjustable; in addition, the filtering device adopts an external design, which is convenient for replacing the filter element, and the repair and maintenance costs are low.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, in particular to a double external solenoid valve type electric control shock absorber with an external filtering device. Background Art

[0002] With the improvement of people's living standards and the popularization of automobile culture, consumers have higher and higher requirements for automobile performance. They not only hope that the car can drive safely and reliably, but also hope to get a more comfortable, stable and maneuverable driving experience. The electronically controlled shock absorber can automatically adjust the damping force of the shock absorber according to different road conditions and driving requirements through its precise adjustment ability, so that the vehicle can maintain good stability and comfort under different conditions, meeting the diverse needs of consumers.

[0003] In recent years, external solenoid valve shock absorbers have gradually become the mainstream form of electronically controlled shock absorbers. The maintenance of external solenoid valve shock absorbers is relatively simple, because key components such as the solenoid valve are located outside the shock absorber, which is convenient for inspection and replacement. Although external solenoid valve electronically controlled shock absorbers are widely used today, they still have shortcomings. After long-term operation, fine impurities may be generated inside the shock absorber. During the recovery and compression strokes of the shock absorber, the flow of oil will inevitably drive the impurities to flow through the valve system. When too much impurity accumulates, it will block the valve system, thereby affecting the function of the shock absorber to adjust the damping force. At the same time, the maintenance cost of the shock absorber is relatively high.

[0004] Chinese patent document CN 110094447 A discloses a hydraulic shock absorber with a filter device. In order to ensure the cleanliness of the shock absorber oil, a filter device is provided in the annular sealing area between the inner oil cylinder and the oil storage cylinder inside the shock absorber. After long-term use, the filter element will inevitably become clogged, affecting the flow of oil. Since the filter device is arranged inside the shock absorber, it is very inconvenient to replace the filter element, and the cost is high, which does not meet the actual needs. Summary of the invention

[0005] The present invention provides a dual external solenoid valve type electronically controlled shock absorber with an external filtering device. The dual external solenoid valve type electronically controlled shock absorber of the present invention has an external filtering device with a specific structure. During the recovery stroke and compression stroke of the shock absorber, oil can enter the filtering device to filter out impurities, thereby avoiding the problem of reduced performance or even damage of the shock absorber due to clogging by impurities, and extending the service life of the shock absorber. At the same time, the filtering device is arranged outside the cylinder, which is convenient for replacing the filter element, and has low repair and maintenance costs.

[0006] The technical solution of the present invention is as follows:

[0007] A double external solenoid valve type electric-controlled shock absorber with an external filtering device comprises a liquid storage cylinder, a working cylinder, a piston damping valve, a connecting rod and a bottom valve; the liquid storage cylinder is arranged on the outside of the working cylinder; the piston damping valve and the working cylinder are slidably matched to divide the space inside the working cylinder into an upper chamber and a lower chamber; the lower end of the connecting rod is connected to the piston damping valve to form a piston assembly; a restoration intermediate cylinder and a compression intermediate cylinder are arranged outside the working cylinder; a restoration leakage chamber is formed between the working cylinder and the restoration intermediate cylinder, and a compression leakage chamber is formed between the working cylinder and the compression intermediate cylinder; a restoration leakage hole is provided on the working cylinder, and the restoration leakage hole connects the upper chamber of the working cylinder with the restoration leakage chamber; the restoration intermediate cylinder is provided with a restoration solenoid valve circulation hole, and correspondingly, a restoration solenoid valve is provided on the liquid storage cylinder; a compression leakage hole is provided on the working cylinder, and the compression leakage hole connects the lower chamber of the working cylinder with the compression leakage chamber; the compression A compression solenoid valve flow hole is provided on the compression intermediate cylinder, and correspondingly, a compression solenoid valve is provided on the liquid storage cylinder; the recovery solenoid valve flow hole is connected with the inlet of the recovery solenoid valve through the recovery connecting sleeve; the compression solenoid valve flow hole is connected with the inlet of the compression solenoid valve through the compression connecting sleeve; a filtering device is provided on the outside of the liquid storage cylinder; the filtering device has an A inlet and an B inlet, the A inlet and the B inlet are connected with the recovery leakage chamber through a pipeline, and the B inlet and the compression leakage chamber through a pipeline; a filter core and a filter oil circuit damping valve are provided inside the filtering device; when the shock absorber is in the recovery stroke, the oil enters the filtering device through the A inlet and the B inlet, flows through the filter core and the filter oil circuit damping valve, and then flows out of the filtering device from the B inlet and the B inlet; when the shock absorber is in the compression stroke, the oil enters the filtering device through the B inlet and the B inlet, flows through the filter core and the filter oil circuit damping valve, and then flows out of the filtering device from the A inlet and the B inlet.

[0008] Compared with the prior art, a filter device of a specific structure is arranged on the outside of the dual external solenoid valve type electronically controlled shock absorber of the present invention, which is used to filter impurities in the oil. The filter device is provided with a filter core and a filter oil circuit damping valve. The existence of the filter oil circuit damping valve ensures that the original solenoid valve function of the electronically controlled shock absorber is not affected, that is, it can still play the role of adjusting the damping force. In the recovery stroke and compression stroke of the shock absorber, the special oil circuit design allows part of the oil to enter the filter device, and the impurities in the oil are removed by the filter device, so as to avoid the phenomenon that the shock absorber performance is reduced or even damaged due to the accumulation of impurities, thereby improving the reliability of the shock absorber and extending the service life of the shock absorber. At the same time, since the filter oil circuit damping valve is provided in the filter device, the shock absorber has an additional damping oil circuit and is more adjustable. In addition, the filter device adopts an external design, which is convenient for replacing the filter element and has low repair and maintenance costs.

[0009] Furthermore, in the above-mentioned double external solenoid valve type electric-controlled shock absorber with an external filtering device, the filtering device includes an outer cylinder; one end of the outer cylinder is provided with a flow control valve system, and the other end is provided with a sealing cover assembly; the interior of the outer cylinder is provided with a filter core and a filter oil circuit damping valve; the flow control valve system includes a valve seat, and the flow control valve seat is provided with an A inlet check valve, an A outlet check valve, a B inlet check valve and a B outlet check valve; the filter core includes a filter inner cylinder, and a filter inner cylinder is provided with a filter element; the inlet end of the filter inner cylinder is connected to the flow control valve seat, and the The outlet end of the filter inner cylinder is connected to the filter oil circuit damping valve; during the recovery stroke of the shock absorber, the oil flows in from the A inlet and outlet, enters the filter inner cylinder through the A inlet check valve, is filtered by the filter element, flows through the filter oil circuit damping valve, enters the chamber between the outer cylinder and the filter inner cylinder, and then flows out from the B inlet and outlet through the A outlet check valve; during the compression stroke of the shock absorber, the oil flows in from the B inlet and outlet, enters the filter inner cylinder through the B inlet check valve, is filtered by the filter element, flows through the filter oil circuit damping valve, enters the chamber between the outer cylinder and the filter inner cylinder, and then flows out from the A inlet and outlet through the B outlet check valve. By setting the A inlet check valve, the A outlet check valve, the B inlet check valve and the B outlet check valve, the functional requirements of the filtering device are realized, which is easy to implement and conducive to industrialization.

[0010] Furthermore, in the above-mentioned double external solenoid valve type electric control shock absorber with external filtering device, the cover assembly includes a cover, and an annular connecting seat is provided on the inner side of the cover; the annular connecting seat is connected with the outer diameter of the outlet end of the filter inner cylinder by cooperation; the valve body of the filter oil circuit damping valve is connected with the inner diameter of the outlet end of the filter inner cylinder by cooperation, and at the same time, the two ends of the filter oil circuit damping valve are respectively against the filter element and the cover; the annular connecting seat is provided with an oil passage hole, and when working, the oil flows through the filter oil circuit damping valve and enters the chamber between the outer cylinder body and the filter inner cylinder from the oil passage hole. As a result, the cover presses the filter oil circuit damping valve and the filter element body to achieve positioning, which has the advantage of easy assembly structure.

[0011] Furthermore, a slot is provided on the inner wall of the outer cylinder, and a retaining spring is provided in the slot; the cover is slidably matched with the inner wall of the outer cylinder and sealed by a sealing ring; the retaining spring blocks the cover to achieve positioning. Furthermore, a handle is provided at the outer end of the cover, and the handle and the cover are connected by threads. The design of the retaining spring can facilitate the installation and removal of the cover assembly, and the addition of a handle makes it easy to operate, which is conducive to further reducing the cost of repair and maintenance.

[0012] Furthermore, in the above-mentioned double external solenoid valve type electric-controlled shock absorber with an external filtering device, the flow control valve seat includes an outer valve seat and an inner valve seat, and a valve plate arranged between the outer valve seat and the inner valve seat; the outer valve seat and the valve plate are fixedly connected to the outer cylinder; one end of the inner valve seat is connected to the inlet end of the filter inner cylinder, and the other end is connected to the valve plate; the A inlet check valve and the B inlet check valve are arranged in the inner valve seat, and correspondingly, the valve plate is provided with an A inlet channel hole and a B inlet channel hole, and the A inlet channel hole is connected to the valve of the A inlet check valve. The B inlet channel hole cooperates with the valve core of the B inlet check valve; there are A flow chamber and B flow chamber between the outer valve seat and the valve plate, the A flow chamber is connected with the A inlet and outlet, the B flow chamber is connected with the B inlet and outlet, the A outlet check valve is arranged in the B flow chamber, the B outlet check valve is arranged in the A flow chamber, and correspondingly, the A outlet channel hole and the B outlet channel hole are arranged on the valve plate, the A outlet channel hole cooperates with the valve core of the A outlet check valve, and the B outlet channel hole cooperates with the valve core of the B outlet check valve. This structure can not only control the oil to flow according to the design requirements and meet the functional requirements of the filtering device, but also is easy to manufacture and assemble.

[0013] Furthermore, in the above-mentioned double external solenoid valve type electric control shock absorber with external filtering device, the recovery middle cylinder is provided with an A filter oil passage hole, and correspondingly, the liquid storage cylinder is provided with an A pipe joint clearance hole and an A oil pipe joint mounting seat, and the A oil pipe joint mounting seat is provided with an A oil pipe joint, and the A oil pipe joint passes through the A pipe joint clearance hole and docks with the A filter oil passage hole; the outer end of the A oil pipe joint is connected with the A inlet and outlet through the A filter oil pipe; the compression middle cylinder is provided with a B filter oil passage hole, and correspondingly, the liquid storage cylinder is provided with a B pipe joint clearance hole and a B oil pipe joint mounting seat, and the B oil pipe joint mounting seat passes through the B pipe joint clearance hole and docks with the B filter oil passage hole; the outer end of the B oil pipe joint is connected with the B inlet and outlet through the B filter oil pipe. With this structure, not only the reliability of the oil circuit is guaranteed, the risk of oil leakage is low, but also it is convenient for manufacturing and assembly.

[0014] Furthermore, in the above-mentioned double external solenoid valve type electronically controlled shock absorber with external filtering device, the A oil pipe joint is connected to the A oil pipe joint mounting seat by threads; the B oil pipe joint is connected to the B oil pipe joint mounting seat by threads. The threaded connection method makes the installation and removal of the joints more convenient.

[0015] Furthermore, in the above-mentioned double external solenoid valve type electric control shock absorber with external filtering device, a first sealing ring is provided between the A oil pipe joint and the A oil pipe joint mounting seat to form a radial seal; a second sealing ring is provided between the A oil pipe joint and the recovery intermediate cylinder to form an axial seal; a third sealing ring is provided between the B oil pipe joint and the B oil pipe joint mounting seat to form a radial seal; a fourth sealing ring is provided between the B oil pipe joint and the compression intermediate cylinder to form an axial seal. This structure can not only form a reliable seal, but also has the characteristics of being easy to implement.

[0016] Furthermore, in the above-mentioned double external solenoid valve type electric control shock absorber with external filter device, the liquid storage cylinder is provided with a filter device mounting seat, and the outer cylinder body is connected to the filter device mounting seat by threads. The filter device is fixed by a threaded connection structure, which is easy to assemble and convenient for later replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a double external solenoid valve type electronically controlled shock absorber with an external filtering device according to the present invention;

[0018] Figure 2 It is a schematic diagram of the installation structure of the oil pipe in the double external solenoid valve type electronically controlled shock absorber with an external filtering device of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the filtering device in the double external solenoid valve type electric control shock absorber with an external filtering device of the present invention;

[0020] Figure 4 It is a schematic diagram of the flow of oil in the filter device during the recovery process of the double external solenoid valve type electronically controlled shock absorber with an external filter device of the present invention;

[0021] Figure 5 It is a schematic diagram of the flow of oil in the filter device during the compression process of the double external solenoid valve type electronically controlled shock absorber with an external filter device of the present invention;

[0022] Figure 6 It is a schematic diagram of the operation of the double external solenoid valve type electronically controlled shock absorber with an external filtering device of the present invention when it is in a compression stroke;

[0023] Figure 7 It is a schematic diagram of the operation of the double external solenoid valve type electronically controlled shock absorber with an external filtering device of the present invention when it is in the recovery stroke;

[0024] Figure 8 It is a partial enlarged view of part A of the double external solenoid valve type electronically controlled shock absorber with an external filtering device of the present invention;

[0025] Fig. 9It is a partial enlarged view of the B portion of the double external solenoid valve type electronically controlled shock absorber with an external filtering device of the present invention.

[0026] The markings in the attached drawings are: 1-liquid storage cylinder; 101-A oil pipe joint mounting seat; 102-B oil pipe joint mounting seat; 103-filter device mounting seat; 2-working cylinder; 201-recovery leakage hole; 202-compression leakage hole; 3-piston damping valve; 4-connecting rod; 5-bottom valve; 6-recovery intermediate cylinder; 601-recovery solenoid valve flow hole; 602-A filter oil passage hole; 7-recovery solenoid valve; 8-compression intermediate cylinder; 801-compression solenoid valve flow hole; 802-B filter oil passage hole; 9-compression solenoid valve; 10-outer cylinder; 1001-slot; 11-A inlet check valve ;12-A outlet one-way valve;13-B inlet one-way valve;14-B outlet one-way valve;15-filter inner cylinder;16-filter element;17-cover;18-annular connecting seat;1801-oil passage hole;19-outer valve seat;20-inner valve seat;21-valve plate;22-A oil pipe joint;23-A filter oil pipe;24-B oil pipe joint;25-B filter oil pipe;26-recovery connecting sleeve;27-compression connecting sleeve;28-filter oil circuit damping valve;29-handle;30-circlip;31-first sealing ring;32-second sealing ring;33-third sealing ring;34-fourth sealing ring. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not used as the basis of the present invention. The contents not described in detail below or the structures not shown in the accompanying drawings are all common technical knowledge in the art.

[0028] See also Figure 1-9The double external solenoid valve type electric control shock absorber with an external filtering device of the present invention comprises a liquid storage cylinder 1, a working cylinder 2, a piston damping valve 3, a connecting rod 4 and a bottom valve 5; the liquid storage cylinder 1 is arranged on the outside of the working cylinder 2; the piston damping valve 3 is slidably matched with the working cylinder 2 to separate the space inside the working cylinder 2 into an upper cavity and a lower cavity; the lower end of the connecting rod 4 is connected to the piston damping valve 3 to form a piston assembly; a restoring intermediate cylinder 6 and a compression intermediate cylinder 8 are arranged on the outer sleeve of the working cylinder 2; a restoring discharge cavity is formed between the working cylinder 2 and the restoring intermediate cylinder 6, and a restoring discharge cavity is formed between the working cylinder 2 and the compression intermediate cylinder 8. A compression leakage chamber is formed between the intermediate cylinders 8; a recovery leakage hole 201 is provided on the working cylinder 2, and the recovery leakage hole 201 makes the upper chamber of the working cylinder 2 communicate with the recovery leakage chamber; a recovery solenoid valve flow hole 601 is provided on the recovery intermediate cylinder 6, and correspondingly, a recovery solenoid valve 7 is provided on the liquid storage cylinder 1; a compression leakage hole 202 is provided on the working cylinder 2, and the compression leakage hole 202 makes the lower chamber of the working cylinder 2 communicate with the compression leakage chamber; a compression solenoid valve flow hole 801 is provided on the compression intermediate cylinder 8, and correspondingly, a compression solenoid valve 9 is provided on the liquid storage cylinder 1. The above design is the same as the double external solenoid valve type electric control shock absorber of the prior art.

[0029] In the present invention, the restoration solenoid valve flow hole 601 is connected to the inlet of the restoration solenoid valve 7 through the restoration connecting sleeve 26 (in the prior art, in order to ensure that the oil can flow into the upper chamber of the working cylinder 2 for compensation during the compression stroke, a one-way valve needs to be set here, but this is not required in the present invention); the compression solenoid valve flow hole 801 is connected to the inlet of the compression solenoid valve 9 through the compression connecting sleeve 27.

[0030] A filtering device is provided on the outside of the liquid storage cylinder 1; the filtering device has an A inlet and an B inlet, the A inlet and an inlet are connected to the recovery leakage chamber through a pipeline, and the B inlet and an inlet are connected to the compression leakage chamber through a pipeline; a filtering core and a filter oil circuit damping valve 28 are provided inside the filtering device; during the recovery stroke of the shock absorber, the oil enters the filtering device through the A inlet and an inlet, flows through the filter core and the filter oil circuit damping valve 28, and then flows out of the filtering device from the B inlet (in the recovery stroke, the oil flows out of the filtering device, enters the compression leakage chamber through the pipeline, and finally enters the lower chamber of the working cylinder 2 for compensation); during the compression stroke of the shock absorber, the oil enters the filtering device through the B inlet and an inlet, flows through the filter core and the filter oil circuit damping valve 28, and then flows out of the filtering device from the A inlet and an inlet (in the compression stroke, the oil flows out of the filtering device, enters the recovery leakage chamber through the pipeline, and finally enters the upper chamber of the working cylinder 2 for compensation).

[0031] Example (see Figure 1-9 ):

[0032] In the embodiment, the filtering device includes an outer cylinder 10; one end of the outer cylinder 10 is provided with a flow control valve system, and the other end is provided with a sealing assembly; the interior of the outer cylinder 10 is provided with a filter core and a filter oil circuit damping valve 28; the flow control valve system includes a valve seat, and the flow control valve seat is provided with an A inlet check valve 11, an A outlet check valve 12, a B inlet check valve 13 and a B outlet check valve 14; the filter core includes a filter inner cylinder 15, and a filter core 16 is provided in the filter inner cylinder 15; the inlet end of the filter inner cylinder 15 is connected to the flow control valve seat, and the outlet end of the filter inner cylinder 15 is connected to the filter oil circuit damping valve 28. 28 are connected; in the recovery stroke of the shock absorber, the oil flows in from the A inlet and outlet, enters the filter inner cylinder 15 through the A inlet check valve 11, is filtered by the filter element 16, flows through the filter oil circuit damping valve 28, enters the chamber between the outer cylinder 10 and the filter inner cylinder 15, and then flows out from the B inlet and outlet through the A outlet check valve 12; in the compression stroke of the shock absorber, the oil flows in from the B inlet and outlet, enters the filter inner cylinder 15 through the B inlet check valve 13, is filtered by the filter element 16, flows through the filter oil circuit damping valve 28, enters the chamber between the outer cylinder 10 and the filter inner cylinder 15, and then flows out from the A inlet and outlet through the B outlet check valve 14. By setting the A inlet check valve 11, the A outlet check valve 12, the B inlet check valve 13 and the B outlet check valve 14, the functional requirements of the filtering device are realized, which is easy to implement and conducive to industrialization.

[0033] In the embodiment, the cover assembly includes a cover 17, and an annular connection seat 18 is provided inside the cover 17; the annular connection seat 18 is connected with the outer diameter of the outlet end of the filter inner cylinder 15; the valve body of the filter oil circuit damping valve 28 is connected with the inner diameter of the outlet end of the filter inner cylinder 15, and at the same time, the two ends of the filter oil circuit damping valve 28 are respectively against the filter element 16 and the cover 17; the annular connection seat 18 is provided with an oil passage hole 1801, and when working, the oil flows through the filter oil circuit damping valve 28 and enters the chamber between the outer cylinder 10 and the filter inner cylinder 15 from the oil passage hole 1801. Therefore, the cover 17 presses the filter oil circuit damping valve 28 and the filter element to achieve positioning, which has the advantage of easy assembly structure.

[0034] In the embodiment, a clamping groove 1001 is provided on the inner wall of the outer cylinder 10, and a clamping spring 30 is provided in the clamping groove 1001; the cover 17 is slidably matched with the inner wall of the outer cylinder 10 and sealed by a sealing ring; the clamping spring 30 blocks the cover 17 to achieve positioning. A handle 29 is provided at the outer end of the cover 17, and the handle 29 and the cover 17 are connected by threads. The design of the clamping spring 30 can facilitate the installation and removal of the cover assembly, and the addition of the handle 29 is easy to operate, which is conducive to further reducing the cost of repair and maintenance.

[0035] In the embodiment, the flow control valve seat includes an outer valve seat 19 and an inner valve seat 20, and a valve plate 21 arranged between the outer valve seat 19 and the inner valve seat 20; the outer valve seat 19 and the valve plate 21 are fixedly connected to the outer cylinder 10; one end of the inner valve seat 20 is connected to the inlet end of the filter inner cylinder 15, and the other end is connected to the valve plate 21; the A inlet check valve 11 and the B inlet check valve 13 are arranged in the inner valve seat 20, and correspondingly, the valve plate 21 is provided with an A inlet channel hole and a B inlet channel hole, and the A inlet channel hole cooperates with the valve core of the A inlet check valve 11, so The B inlet channel hole cooperates with the valve core of the B inlet check valve 13; there are A flow chamber and B flow chamber between the outer valve seat 19 and the valve plate 21, the A flow chamber is connected with the A inlet and outlet, the B flow chamber is connected with the B inlet and outlet, the A outlet check valve 12 is arranged in the B flow chamber, the B outlet check valve 14 is arranged in the A flow chamber, and correspondingly, the A outlet channel hole and the B outlet channel hole are arranged on the valve plate 21, the A outlet channel hole cooperates with the valve core of the A outlet check valve 12, and the B outlet channel hole cooperates with the valve core of the B outlet check valve 14. This structure can not only control the oil to flow according to the design requirements and meet the functional requirements of the filtering device, but also is easy to manufacture and assemble.

[0036] In the embodiment, the recovery intermediate cylinder 6 is provided with an A filter oil passage hole 602, and correspondingly, the liquid storage cylinder 1 is provided with an A pipe joint yield hole and an A oil pipe joint mounting seat 101, and the A oil pipe joint mounting seat 101 is provided with an A oil pipe joint 22, and the A oil pipe joint 22 passes through the A pipe joint yield hole and connects with the A filter oil passage hole 602; the outer end of the A oil pipe joint 22 is connected with the A inlet and outlet through the A filter oil pipe 23; the compression intermediate cylinder 8 is provided with a B filter oil passage hole 802, and correspondingly, the liquid storage cylinder 1 is provided with a B pipe joint yield hole and a B oil pipe joint mounting seat 102, and the B oil pipe joint mounting seat 102 passes through the B pipe joint yield hole and connects with the B filter oil passage hole 802; the outer end of the B oil pipe joint 24 is connected with the B inlet and outlet through the B filter oil pipe 25.

[0037] In the embodiment, the A oil pipe joint 22 is connected to the A oil pipe joint mounting seat 101 by threads, and the B oil pipe joint 24 is connected to the B oil pipe joint mounting seat 102 by threads. The threaded connection makes the joint installation and removal more convenient.

[0038] In the embodiment, a first sealing ring 31 is provided between the A oil pipe joint 22 and the A oil pipe joint mounting seat 101 to form a radial seal; a second sealing ring 32 is provided between the A oil pipe joint 22 and the recovery intermediate cylinder 6 to form an axial seal; a third sealing ring 33 is provided between the B oil pipe joint 24 and the B oil pipe joint mounting seat 102 to form a radial seal; a fourth sealing ring 34 is provided between the B oil pipe joint 24 and the compression intermediate cylinder 8 to form an axial seal. This structure can not only form a reliable seal, but also has the characteristics of being easy to implement.

[0039] Furthermore, in the above-mentioned double external solenoid valve type electric control shock absorber with external filter device, the liquid storage cylinder 1 is provided with a filter device mounting seat 103, and the outer cylinder body 10 is threadedly connected to the filter device mounting seat 103. The filter device is fixed by a threaded connection structure, which is easy to assemble and convenient for later replacement and maintenance.

[0040] like Figure 6 As shown, in the compression stroke of the shock absorber, the shock absorber of the present invention has two oil circuits that can generate compression damping:

[0041] Compression damping oil circuit 1 Cr1: It flows into the compression leakage chamber from the compression leakage hole 202 at the lower end of the working cylinder 2, and then flows into the compression solenoid valve 9 through the compression connecting sleeve 27, and the damping force is generated through the compression solenoid valve 9, and finally the oil flows into the liquid storage cylinder 1.

[0042] Compression damping oil circuit 2 Cr2: After the oil is squeezed, it enters the filter inner tube 15 from the B filter oil pipe 25 through the B inlet one-way valve 13, and generates damping force through the filter oil circuit damping valve 28.

[0043] During the compression stroke, the oil flows through Figure 6 The compression compensation oil circuit Cc1 shown in the figure enters the upper chamber of the working cylinder 2 to compensate for the volume vacated by the downward movement of the piston damping valve 3.

[0044] Compression compensation oil circuit 1 Cc1: The oil enters the A filter oil pipe 23 through the B outlet one-way valve 14, then enters the recovery leakage chamber through the A filter oil pipe 23, and finally flows into the upper chamber of the working cylinder 2 from the recovery leakage hole 201.

[0045] like Figure 7 As shown in the figure, during the recovery stroke of the shock absorber, there are two oil circuits that can produce recovery damping:

[0046] Restoration damping oil circuit 1 Rr1: The oil flows into the restoration leakage chamber from the restoration leakage hole 201 at the upper end of the working cylinder 2, and then enters the restoration solenoid valve 7 through the restoration connecting sleeve 26, generates damping force through the restoration solenoid valve 7, and finally flows into the liquid storage cylinder 1.

[0047] Restoration damping oil circuit 2 Rr2: After the oil is squeezed, it flows from the A filter oil pipe 23 into the filter inner cylinder 15 through the A inlet check valve 11, and generates damping force through the filter oil circuit damping valve 28.

[0048] During the recovery stroke, the oil flows through Figure 7 The restoring compensation oil circuits Rc1 and Rc2 shown in the figure enter the lower chamber of the working cylinder 2 to compensate for the volume vacated by the upward movement of the piston damping valve 3.

[0049] Restoration compensation oil circuit 1 Rc1: Oil flows from the bottom valve 5 into the lower chamber of the working cylinder 2.

[0050] Restoration compensation oil circuit 2 Rc2: The oil enters the B filter oil pipe 25 through the A outlet check valve 12, then enters the compression leakage chamber through the B filter oil pipe 25, and finally flows into the lower chamber of the working cylinder 2 from the compression leakage hole 202.

[0051] The above general description of the invention involved in this application and the description of its specific implementation methods 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, without violating the constituent elements of the invention involved, add, reduce or combine the disclosed technical features in the above general description or / and specific implementation methods (including examples) to form other technical solutions within the scope of protection of this application.

Claims

1. A double external solenoid valve type electric control shock absorber with an external filtering device, comprising a liquid storage cylinder (1), a working cylinder (2), a piston damping valve (3), a connecting rod (4) and a bottom valve (5); the liquid storage cylinder (1) is arranged on the outside of the working cylinder (2); the piston damping valve (3) and the working cylinder (2) are slidably matched to separate the space inside the working cylinder (2) into an upper chamber and a lower chamber; the lower end of the connecting rod (4) is connected to the piston damping valve (3) to form a piston assembly; the outer sleeve of the working cylinder (2) is provided with a restoring intermediate cylinder (6) and a compression intermediate cylinder (8); a restoring discharge chamber is formed between the working cylinder (2) and the restoring intermediate cylinder (6); and the working cylinder (2) and the compression intermediate cylinder (8) are connected to each other. A compression leakage chamber is formed between the intermediate cylinders (8); the working cylinder (2) is provided with a recovery leakage hole (201), and the recovery leakage hole (201) enables the upper chamber of the working cylinder (2) to communicate with the recovery leakage chamber; the recovery intermediate cylinder (6) is provided with a recovery solenoid valve flow hole (601), and correspondingly, the liquid storage cylinder (1) is provided with a recovery solenoid valve (7); the working cylinder (2) is provided with a compression leakage hole (202), and the compression leakage hole (202) enables the lower chamber of the working cylinder (2) to communicate with the compression leakage chamber; the compression intermediate cylinder (8) is provided with a compression solenoid valve flow hole (801), and correspondingly, the liquid storage cylinder (1) is provided with a compression solenoid valve (9); Features: The restoration solenoid valve flow hole (601) is communicated with the inlet of the restoration solenoid valve (7) via the restoration connecting sleeve (26); the compression solenoid valve flow hole (801) is communicated with the inlet of the compression solenoid valve (9) via the compression connecting sleeve (27); The liquid storage cylinder (1) is provided with a filter device on the outside; the filter device has an A inlet and an B inlet, the A inlet and an outlet are connected to the recovery leakage chamber through a pipeline, and the B inlet and an outlet are connected to the compression leakage chamber through a pipeline; the filter device is provided with a filter core and a filter oil circuit damping valve (28) inside; when the shock absorber is in a recovery stroke, the oil enters the filter device through the A inlet and an outlet, flows through the filter core and the filter oil circuit damping valve (28), and then flows out of the filter device from the B inlet; when the shock absorber is in a compression stroke, the oil enters the filter device through the B inlet and an outlet, flows through the filter core and the filter oil circuit damping valve (28), and then flows out of the filter device from the A inlet; The filtering device comprises an outer cylinder (10); a flow control valve system is provided at one end of the outer cylinder (10), and a sealing cover assembly is provided at the other end; a filter core and a filter oil circuit damping valve (28) are provided inside the outer cylinder (10); the flow control valve system comprises a flow control valve seat, and an A inlet check valve (11), an A outlet check valve (12), a B inlet check valve (13), and a B outlet check valve (14) are provided in the flow control valve seat; the filter core comprises a filter inner cylinder (15), and a filter core (16) is provided in the filter inner cylinder (15); the inlet end of the filter inner cylinder (15) is connected to the flow control valve seat, and the outlet end of the filter inner cylinder (15) is connected to the filter oil circuit damping valve (28); ) are connected; during the recovery stroke of the shock absorber, the oil flows in from the A inlet and outlet, enters the filter inner cylinder (15) through the A inlet check valve (11), is filtered by the filter element (16), flows through the filter oil circuit damping valve (28), enters the chamber between the outer cylinder (10) and the filter inner cylinder (15), and then flows out from the B inlet and outlet through the A outlet check valve (12); during the compression stroke of the shock absorber, the oil flows in from the B inlet and outlet, enters the filter inner cylinder (15) through the B inlet check valve (13), is filtered by the filter element (16), flows through the filter oil circuit damping valve (28), enters the chamber between the outer cylinder (10) and the filter inner cylinder (15), and then flows out from the A inlet and outlet through the B outlet check valve (14).

2. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 1, characterized in that: The sealing cover assembly comprises a sealing cover (17), an annular connecting seat (18) is provided on the inner side of the sealing cover (17); the annular connecting seat (18) is connected to the outer diameter of the outlet end of the filter inner cylinder (15) by matching; the valve body of the filter oil circuit damping valve (28) is connected to the inner diameter of the outlet end of the filter inner cylinder (15) by matching, and at the same time, the two ends of the filter oil circuit damping valve (28) are respectively against the filter element (16) and the sealing cover (17); the annular connecting seat (18) is provided with an oil passage hole (1801), and when in operation, after the oil flows through the filter oil circuit damping valve (28), it enters the chamber between the outer cylinder body (10) and the filter inner cylinder (15) through the oil passage hole (1801).

3. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 2, characterized in that: A clamping groove (1001) is provided on the inner wall of the outer cylinder (10), and a clamping spring (30) is provided in the clamping groove (1001); the sealing cover (17) is slidably matched with the inner wall of the outer cylinder (10) and is sealed by a sealing ring; the clamping spring (30) blocks the sealing cover (17) to achieve positioning.

4. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 2, characterized in that: A handle (29) is provided at the outer end of the sealing cover (17), and the handle (29) and the sealing cover (17) are connected via threads.

5. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 1, characterized in that: The flow control valve seat comprises an outer valve seat (19), an inner valve seat (20), and a valve plate (21) arranged between the outer valve seat (19) and the inner valve seat (20); the outer valve seat (19) and the valve plate (21) are fixedly connected to the outer cylinder (10); one end of the inner valve seat (20) is connected to the inlet end of the filter inner cylinder (15), and the other end is connected to the valve plate (21); the A inlet check valve (11) and the B inlet check valve (13) are arranged in the inner valve seat (20), and correspondingly, the valve plate (21) is provided with an A inlet channel hole and a B inlet channel hole, and the A inlet channel hole is connected to the A inlet check valve (11). The valve core cooperates, and the B inlet channel hole cooperates with the valve core of the B inlet check valve (13); there are an A flow chamber and a B flow chamber between the outer valve seat (19) and the valve plate (21), the A flow chamber is connected to the A inlet and outlet, and the B flow chamber is connected to the B inlet and outlet, the A outlet check valve (12) is arranged in the B flow chamber, and the B outlet check valve (14) is arranged in the A flow chamber. Correspondingly, the valve plate (21) is provided with an A outlet channel hole and a B outlet channel hole, the A outlet channel hole cooperates with the valve core of the A outlet check valve (12), and the B outlet channel hole cooperates with the valve core of the B outlet check valve (14).

6. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 1, characterized in that: The restoration intermediate cylinder (6) is provided with an A filter oil passage hole (602), and correspondingly, the liquid storage cylinder (1) is provided with an A pipe joint clearance hole and an A oil pipe joint mounting seat (101), and an A oil pipe joint (22) is provided in the A oil pipe joint mounting seat (101), and the A oil pipe joint (22) passes through the A pipe joint clearance hole to connect with the A filter oil passage hole (602); the outer end of the A oil pipe joint (22) is connected with the A inlet and outlet through the A filter oil pipe (23); the compression intermediate cylinder (8) is provided with a B filter oil passage hole (802), and correspondingly, the liquid storage cylinder (1) is provided with a B pipe joint clearance hole and a B oil pipe joint mounting seat (102), and the B oil pipe joint mounting seat (102) passes through the B pipe joint clearance hole to connect with the B filter oil passage hole (802); the outer end of the B oil pipe joint (24) is connected with the B inlet and outlet through the B filter oil pipe (25).

7. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 6, characterized in that: The A oil pipe joint (22) is connected to the A oil pipe joint mounting seat (101) via threads; and the B oil pipe joint (24) is connected to the B oil pipe joint mounting seat (102) via threads.

8. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 6, characterized in that: A first sealing ring (31) is provided between the A oil pipe joint (22) and the A oil pipe joint mounting seat (101) to form a radial seal; a second sealing ring (32) is provided between the A oil pipe joint (22) and the recovery intermediate cylinder (6) to form an axial seal; a third sealing ring (33) is provided between the B oil pipe joint (24) and the B oil pipe joint mounting seat (102) to form a radial seal; and a fourth sealing ring (34) is provided between the B oil pipe joint (24) and the compression intermediate cylinder (8) to form an axial seal.

9. The double external solenoid valve type electronically controlled shock absorber with an external filtering device according to claim 1, characterized in that: The liquid storage cylinder (1) is provided with a filter device mounting seat (103), and the outer cylinder body (10) is connected to the filter device mounting seat (103) via threads.

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