Double-electromagnetic-valve type semi-active electric control shock absorber

Abstract

The invention provides a double-electromagnetic-valve type semi-active electric control shock absorber which comprises an oil storage cylinder and a working cylinder, the working cylinder is fixedly arranged in the oil storage cylinder in a sleeved mode, and a first oil storage cavity and a second oil storage cavity which are isolated from each other are formed between the working cylinder and the oil storage cylinder; the piston assembly is installed in the working cylinder, and the piston assembly divides the inner space of the working cylinder into a recovery cavity and a compression cavity which are isolated from each other; the auxiliary cylinder is installed on the outer side of the oil storage cylinder, a first oil hole and a second oil hole are formed in the bottom of the auxiliary cylinder, and the first oil hole and the second oil hole are connected with the first oil storage cavity and the second oil storage cavity respectively. A recovery middle cavity and a lower working cavity in an existing product are omitted, so that the structure is more simplified. Only one valve system (recovery or compression) and electromagnetic valve working liquid flow in one direction in one stroke, the forming factor of damping force is single, and the robustness of the system is high.

Description

Technical Field

[0001] The invention relates to the field of electronically controlled shock absorbers, and in particular to a double-solenoid valve type semi-active electronically controlled shock absorber. Background Art

[0002] Figure 1 It is a structural schematic diagram of a dual-solenoid valve semi-active electronically controlled shock absorber in the prior art.

[0003] like Figure 1 As shown, in the prior art, the structure of the dual-solenoid valve semi-active electronically controlled shock absorber includes three cylinder bodies, namely, an oil storage cylinder 10, an intermediate cylinder (i.e., including an upper intermediate cylinder 20 and a lower intermediate cylinder 21) and a working cylinder 30, and a piston rod 40 that can move up and down in the working cylinder 30. A piston valve is arranged on the piston rod 40, and the piston valve is composed of a restoring solenoid valve 51 and a circulation valve 52. A bottom valve is arranged at the bottom of the working cylinder 30, and the bottom valve is composed of a compression valve 61 and a compensation valve 62. The restoring chamber A and the oil storage chamber B are connected through the restoring solenoid valve 70, and the compression chamber C and the oil storage chamber B are connected through the compression solenoid valve 80.

[0004] Figure 2 The figure is a schematic diagram of the recovery stroke of a dual-solenoid valve semi-active electronically controlled shock absorber in the prior art.

[0005] like Figure 2 As shown in the figure, the working process of the recovery stroke of the dual solenoid valve semi-active electronically controlled shock absorber is as follows: the piston rod 40 moves upward (leftward in the figure), and the recovery chamber A is a high-pressure chamber at this time. Part of the damping fluid flows from the recovery chamber A through the recovery solenoid valve 51 into the compression chamber C. Compared with the compression chamber C, the recovery chamber A has an additional volume of the piston rod 40, and part of the liquid in the oil storage cylinder B will push the compensation valve 62 open and flow into the compression chamber C.

[0006] At the same time, part of the damping fluid in the restoration chamber A flows into the restoration middle chamber through the connecting hole between the restoration chamber A and the restoration middle chamber. Since the restoration chamber and the restoration middle chamber are connected, the restoration middle chamber is a high-pressure chamber. The liquid flows from the restoration middle chamber to the oil storage chamber B through the one-way valve and the restoration solenoid valve 51. When the restoration solenoid valve 51 is energized, the liquid flow rate can be changed by changing the solenoid valve current, and the damping force can be further changed to achieve adjustable restoration damping.

[0007] Figure 3 It is a schematic diagram of the compression stroke of a dual-solenoid valve semi-active electronically controlled shock absorber in the prior art.

[0008] like Figure 3As shown, the working process of the compression stroke of the dual solenoid valve semi-active electronically controlled shock absorber is as follows: the piston rod 40 moves downward (rightward in the figure), at this time, the compression chamber C is a high-pressure chamber, and part of the liquid flows from the compression chamber C to the recovery chamber A through the circulation valve. At the same time, compared with the compression chamber C, the recovery chamber A has an additional piston rod volume, and part of the damping liquid flows from the compression chamber C to the oil storage chamber B through the compression valve 61. Another part of the damping liquid flows into the compression middle chamber through the connecting hole between the compression chamber C and the compression middle chamber. Since the compression chamber C and the compression middle chamber are connected, the compression middle chamber is a high-pressure chamber.

[0009] The liquid flows from the compression middle chamber into the oil storage chamber through the compression solenoid valve. When the recovery solenoid valve is energized, the liquid flow rate can be changed by changing the current of the solenoid valve, and the damping force can be further changed to achieve adjustable compression damping.

[0010] It can be seen that the existing dual electromagnetic semi-active electronically controlled shock absorber is developed on the basis of the traditional passive shock absorber. Its structure and working principle retain many characteristics of the traditional shock absorber, and the function of the electromagnetic valve is added. Its structure is very complex. In particular, the valve system includes: the recovery valve 70, the compensation valve 62, the flow valve 52, the compression valve 61, the check valve 90 and the electromagnetic valve. In addition, there are many working chambers, including: the recovery chamber A, the compression chamber C, the oil storage chamber B, the recovery intermediate chamber D and the compression intermediate chamber E.

[0011] In view of this, the inventor of the present application has designed a dual-solenoid valve type semi-active electronically controlled shock absorber in order to overcome the above technical problems. Summary of the invention

[0012] The technical problem to be solved by the present invention is to overcome the defects of the prior art that the dual electromagnetic semi-active electronically controlled shock absorber has a complex structure and adopts many valve structures, and to provide a dual electromagnetic valve type semi-active electronically controlled shock absorber.

[0013] The present invention solves the above technical problems through the following technical solutions:

[0014] A double solenoid valve type semi-active electronically controlled shock absorber, characterized in that the double solenoid valve type semi-active electronically controlled shock absorber comprises:

[0015] An oil storage cylinder and a working cylinder, wherein the working cylinder is sleeved and fixed in the oil storage cylinder, and a first oil storage cavity and a second oil storage cavity isolated from each other are formed between the working cylinder and the oil storage cylinder;

[0016] A piston assembly, the piston assembly being installed in the working cylinder, the piston assembly dividing the space in the working cylinder into a recovery chamber and a compression chamber which are isolated from each other;

[0017] An auxiliary cylinder is installed on the outside of the oil storage cylinder. A first oil hole and a second oil hole are opened at the bottom of the auxiliary cylinder. The first oil hole and the second oil hole are connected to the first oil storage cavity and the second oil storage cavity respectively.

[0018] According to one embodiment of the present invention, the piston assembly includes a piston rod and a piston, and one end of the piston rod is installed in the working cylinder through the piston, so that the piston rod moves back and forth in the working cylinder.

[0019] According to one embodiment of the present invention, the cavity formed between the piston rod, the piston and the working cylinder is the recovery cavity, and the cavity formed between the piston and the working cylinder is the compression cavity.

[0020] According to one embodiment of the present invention, a first connecting hole and a second connecting hole are provided on the working cylinder, the restoration chamber and the first oil storage chamber are connected through the first connecting hole, and the compression chamber and the second oil storage chamber are connected through the second connecting hole.

[0021] According to one embodiment of the present invention, a compression solenoid valve, a restoring solenoid valve and a valve seat are provided in the auxiliary cylinder, the compression solenoid valve and the restoring solenoid valve are respectively installed on both sides of the valve seat, the first oil hole is located below the compression solenoid valve, and the second oil hole is located below the restoring solenoid valve.

[0022] According to one embodiment of the present invention, the auxiliary cylinder includes a cylinder body, and the compression battery valve, the restoration solenoid valve and the valve seat are installed in the cylinder body.

[0023] According to one embodiment of the present invention, the auxiliary cylinder further comprises a compression valve and a restoration valve, wherein the compression valve is installed between the valve seat and the compression solenoid valve, and the restoration valve is installed between the valve seat and the restoration solenoid valve.

[0024] According to one embodiment of the present invention, the dual-solenoid valve type semi-active electronically controlled shock absorber further comprises a guide, and the guide is installed between the outlet end of the working cylinder and the piston rod.

[0025] According to one embodiment of the present invention, an oil seal is provided between the outlet end of the oil storage cylinder and the piston rod.

[0026] The positive and progressive effects of the present invention are:

[0027] The dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention has the following advantages:

[0028] 1. The working chamber is optimized, reducing from 5 working chambers to 3 working chambers, eliminating the restored middle chamber and lower working chamber in the existing products, making the structure simpler.

[0029] 2. The valve system is greatly optimized, from the existing six valves of restoring valve, compensating valve, flow valve, compression valve, check valve and solenoid valve to three types of valves: restoring valve, compression valve and solenoid valve.

[0030] 3. The liquid flow is simpler. There is only one valve system (restoration or compression) and solenoid valve working liquid in one stroke. The damping force is formed by a single factor and the system is highly robust. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0032] Figure 1 It is a structural schematic diagram of a dual-solenoid valve semi-active electronically controlled shock absorber in the prior art.

[0033] Figure 2 The figure is a schematic diagram of the recovery stroke of a dual-solenoid valve semi-active electronically controlled shock absorber in the prior art.

[0034] Figure 3 It is a schematic diagram of the compression stroke of a dual-solenoid valve semi-active electronically controlled shock absorber in the prior art.

[0035] Figure 4 It is a structural schematic diagram of the dual solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0036] Figure 5 The figure is a schematic diagram of the structure of the auxiliary cylinder in the double-solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0037] Figure 6 It is a schematic diagram of the restoring stroke of the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0038] Figure 7 It is a schematic diagram of the compression stroke of the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0041] Furthermore, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the present invention specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this document.

[0042] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings connoted by each term.

[0043] Figure 4 It is a structural schematic diagram of the dual solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0044] like Figure 4 As shown, the present invention discloses a dual-solenoid valve type semi-active electronically controlled shock absorber, which includes: an oil storage cylinder 100, a working cylinder 200, a piston assembly and an auxiliary cylinder 300. The working cylinder 200 is sleeved and fixed in the oil storage cylinder 100, and a first oil storage chamber 400 and a second oil storage chamber 500 isolated from each other are formed between the working cylinder 200 and the oil storage cylinder 100. The piston assembly is installed in the working cylinder 200, and the piston assembly divides the internal space of the working cylinder 200 into a recovery chamber 600 and a compression chamber 700 isolated from each other. The auxiliary cylinder 300 is installed on the outside of the oil storage cylinder 100, and a first oil hole 310 and a second oil hole 320 are opened at the bottom of the auxiliary cylinder 300, and the first oil hole 310 and the second oil hole 320 are connected to the first oil storage chamber 400 and the second oil storage chamber 500 respectively.

[0045] Preferably, the piston assembly includes a piston rod 800 and a piston 810, and one end of the piston rod 800 is installed in the working cylinder 200 through the piston 810, so that the piston rod 800 moves back and forth in the working cylinder 200. The cavity formed between the piston rod 800, the piston 810 and the working cylinder 200 is the recovery cavity 600, and the cavity formed between the piston 810 and the working cylinder 200 is the compression cavity 700.

[0046] A first connecting hole 210 and a second connecting hole 220 are also provided on the working cylinder 200 . The recovery chamber 600 and the first oil storage chamber 400 are connected via the first connecting hole 210 , and the compression chamber 700 and the second oil storage chamber 500 are connected via the second connecting hole 220 .

[0047] Figure 5 The figure is a schematic diagram of the structure of the auxiliary cylinder in the double-solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0048] like Figure 5As shown, a compression solenoid valve 330, a restoration solenoid valve 340 and a valve seat 350 are provided in the auxiliary cylinder 300. The compression solenoid valve 330 and the restoration solenoid valve 340 are respectively installed on both sides of the valve seat 350. The first oil hole 310 is located below the compression solenoid valve 330, and the second oil hole 320 is located below the restoration solenoid valve 340. The auxiliary cylinder 300 includes a cylinder body 360, and the compression solenoid valve 330, the restoration solenoid valve 340 and the valve seat 350 are installed in the cylinder body 360.

[0049] Preferably, the auxiliary cylinder 300 further includes a compression valve 370 and a restoring valve 380 . The compression valve 370 is installed between the valve seat 350 and the compression solenoid valve 330 , and the restoring valve 380 is installed between the valve seat 350 and the restoring solenoid valve 340 .

[0050] Here, the main function of the compression solenoid valve 330 is to change the solenoid valve current according to the actual road conditions and user preferences through the information provided by the signal system, and adjust the damping force of the compression stroke. The function of the compression valve 370 is to limit the flow through it through the stiffness of the valve plate and the pressure difference of the damping fluid, thereby generating compression damping, and it also has a one-way valve function.

[0051] The main function of the restoring solenoid valve 340 is to change the solenoid valve current and adjust the restoring stroke damping force according to the actual road conditions and user preferences through the information provided by the signal system. The function of the restoring valve 380 is to limit the flow through it through the stiffness of the valve plate and the pressure difference of the damping fluid, thereby generating restoring damping, and it also has a one-way valve function.

[0052] Furthermore, the dual-solenoid valve type semi-active electronically controlled shock absorber further includes a guide 900, which is installed between the outlet end of the working cylinder 200 and the piston rod 800. An oil seal 910 is provided between the outlet end of the oil storage cylinder 100 and the piston rod 800.

[0053] Figure 6 It is a schematic diagram of the restoring stroke of the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0054] like Figure 6 As shown, the recovery stroke of the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention is: the piston rod 800 moves upward ( Figure 6The restoring chamber 600 is compressed and becomes a high-pressure chamber. The damping fluid in the restoring chamber 600 flows into the first oil storage chamber 400 through the first connecting hole 210 between the restoring chamber 600 and the first oil storage chamber 400. The high-pressure damping fluid pushes the restoring valve 380 to flow into the restoring solenoid valve 340, further flows into the second oil storage chamber 500, and flows into the compression chamber 700 through the second connecting hole 220 between the second oil storage chamber 500 and the compression chamber 700. The throttling effect of the restoring valve 380 generates a damping force, and at the same time, the restoring solenoid valve 340 is energized. The liquid flow rate can be changed by changing the size of the solenoid valve current, and the damping force can be further changed, so that the restoring damping can be adjusted.

[0055] Figure 7 It is a schematic diagram of the compression stroke of the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention.

[0056] like Figure 7 As shown, the compression stroke of the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention is: the piston rod 800 moves downward ( Figure 7 The compression chamber 700 is compressed to become a high-pressure chamber. The damping fluid in the compression chamber 700 flows into the second oil storage chamber 500 through the second connecting hole 220 between the compression chamber 700 and the second oil storage chamber 500. The high-pressure damping fluid pushes the compression valve 370 to flow into the compression solenoid valve 330, further flows into the first oil storage chamber 400, and flows into the restoration chamber 600 through the first connecting hole 210 between the first oil storage chamber 400 and the restoration chamber 600. The throttling effect of the compression valve 700 generates a damping force, and at the same time, the compression solenoid valve is energized. The liquid flow rate can be changed by changing the current of the solenoid valve, and the damping force can be further changed, so that the compression damping can be adjusted.

[0057] According to the above description, the structure of the basic valve system (piston valve and bottom valve) of the dual solenoid valve type semi-active electronically controlled shock absorber of the present invention no longer uses the basic valve system structure of the traditional passive shock absorber, and is completely redesigned. The improvements are:

[0058] 1. The cylinder body layout is the same as the traditional shock absorber, with the oil storage cylinder and the working cylinder arranged. The difference is that the upper middle cylinder and the lower middle cylinder are eliminated outside the working cylinder. At the same time, the bottom valve set at the bottom of the working cylinder is eliminated.

[0059] Second, a piston assembly is set inside the working cylinder, which includes a piston rod and a piston. The piston rod can move up and down in the working cylinder. A piston is set on it. Different from the traditional shock absorber, this piston no longer has a restoring valve and a flow valve. The piston divides the working cylinder into a completely isolated restoring chamber and a compression chamber.

[0060] 3. An auxiliary cylinder is arranged outside the oil storage cylinder. The outside of the oil storage cylinder is a circular cylinder body, and compression solenoid valve and recovery solenoid valve are arranged at both ends of the inside. A valve seat is arranged in the middle, and compression valve and recovery valve are arranged on both sides of the valve seat. The first oil hole and the second oil hole are arranged below the compression valve and the recovery valve, which are connected to the first oil storage cavity and the second oil storage cavity respectively.

[0061] The dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention solves the problems of complex structure, high manufacturing cost, and difficulty in quality control of the existing dual-solenoid valve semi-active electronically controlled shock absorber. In the present invention, only one basic valve system (compression valve or recovery valve) and corresponding electromagnetic valve work in one stroke, the liquid flows in one direction, the formation factor of the damping force is single, the system has high robustness, and the quality control difficulty is low.

[0062] In summary, the dual-solenoid valve type semi-active electronically controlled shock absorber of the present invention has the following advantages:

[0063] 1. The working chamber is optimized, reducing from 5 working chambers to 3 working chambers, eliminating the restored middle chamber and lower working chamber in the existing products, making the structure simpler.

[0064] 2. The valve system is greatly optimized, from the existing six valves of restoring valve, compensating valve, flow valve, compression valve, check valve and solenoid valve to three types of valves: restoring valve, compression valve and solenoid valve.

[0065] 3. The liquid flow is simpler. There is only one valve system (restoration or compression) and solenoid valve working liquid in one stroke. The damping force is formed by a single factor and the system is highly robust.

[0066] For those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary implementation of the present application.

[0067] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0068] Similarly, it should be noted that in order to simplify the description disclosed in this application and thus help understand one or more embodiments of the invention, in the foregoing description of the embodiments of the present application, multiple features are sometimes merged into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those mentioned in the claims. In fact, the features of the implementation are less than all the features of the single implementation disclosed above. In some implementations, numbers are used to describe the number of components and attributes. It should be understood that such numbers used to describe the implementations are modified in some examples using the modifiers "approximately", "approximately" or "substantially".

[0069] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A dual solenoid valve type semi-active electronically controlled shock absorber, characterized in that: The dual solenoid valve type semi-active electronically controlled shock absorber comprises: An oil storage cylinder and a working cylinder, wherein the working cylinder is sleeved and fixed in the oil storage cylinder, and a first oil storage cavity and a second oil storage cavity isolated from each other are formed between the working cylinder and the oil storage cylinder; A piston assembly, wherein the piston assembly is installed in the working cylinder, and the piston assembly divides the space in the working cylinder into a recovery chamber and a compression chamber which are isolated from each other; An auxiliary cylinder is installed on the outside of the oil storage cylinder. A first oil hole and a second oil hole are opened at the bottom of the auxiliary cylinder. The first oil hole and the second oil hole are connected to the first oil storage cavity and the second oil storage cavity respectively.

2. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 1, characterized in that: The piston assembly includes a piston rod and a piston. One end of the piston rod is installed in the working cylinder through the piston, so that the piston rod moves back and forth in the working cylinder.

3. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 2, characterized in that: The cavity formed between the piston rod, the piston and the working cylinder is the restoration cavity, and the cavity formed between the piston and the working cylinder is the compression cavity.

4. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 3, characterized in that: The working cylinder is provided with a first communicating hole and a second communicating hole. The restoration chamber and the first oil storage chamber are communicated with each other through the first communicating hole, and the compression chamber and the second oil storage chamber are communicated with each other through the second communicating hole.

5. The dual-solenoid valve type semi-active electronically controlled shock absorber according to claim 1, characterized in that: A compression solenoid valve, a restoring solenoid valve and a valve seat are arranged in the auxiliary cylinder. The compression solenoid valve and the restoring solenoid valve are respectively installed on both sides of the valve seat. The first oil hole is located below the compression solenoid valve, and the second oil hole is located below the restoring solenoid valve.

6. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 5, characterized in that: The auxiliary cylinder includes a cylinder body, and the compression battery valve, the restoration solenoid valve and the valve seat are installed in the cylinder body.

7. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 5, characterized in that: The auxiliary cylinder further includes a compression valve and a restoration valve. The compression valve is installed between the valve seat and the compression solenoid valve, and the restoration valve is installed between the valve seat and the restoration solenoid valve.

8. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 2, characterized in that: The dual-solenoid valve type semi-active electronically controlled shock absorber further comprises a guide, which is installed between the outlet end of the working cylinder and the piston rod.

9. The dual solenoid valve type semi-active electronically controlled shock absorber according to claim 8, characterized in that: An oil seal is arranged between the outlet end of the oil storage cylinder and the piston rod.

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