Electromagnetic valve driving mechanism and shock absorber

Abstract

The application provides an electromagnetic valve driving mechanism and a damping shock absorber, which comprises a armature, an elastic element and a mounting base which are sequentially sleeved outside a push rod; one end of the elastic element acts on the armature, and the other end acts on the mounting base; the elastic element generates an axial elastic force on the armature and the mounting base; when the push rod and the armature move together in the axial direction towards the mounting base to drive the hydraulic element, the elastic element will generate a reverse force, so that the armature and the push rod will not suddenly move downward, the initial force of the armature and the push rod on the hydraulic element is relatively gentle, the electromagnetic valve is prevented from suddenly starting, the probability of violent collision of the internal elements of the electromagnetic valve is reduced, and the damping adjustment effect of the shock absorber is increased; the elastic element comprises n elastic rings; when the elastic element is in a compressed state, at least two elastic rings are located on the same radial plane, so that the space occupied after compression is small, the space between the armature and the mounting base for mounting the elastic element can be set to be small, and the setting volume of the electromagnetic valve is reduced.

Description

Technical Field

[0001] This application relates to the field of solenoid valve technology, specifically to a solenoid valve drive mechanism and a damping shock absorber. Background Technology

[0002] A solenoid valve is a component that uses electromagnetic force to control the on / off state or flow direction of fluid. The solenoid valve has a drive mechanism inside, which can generate thrust when energized to drive hydraulic components, thereby achieving precise control of oil flow rate and flow rate, and thus achieving precise regulation of fluid flow.

[0003] The existing solenoid valve drive mechanism includes a housing, a magnetic coil, a magnetic flux tube, an armature, and a push rod. The armature is sleeved on the push rod, the bottom of the push rod is located on the top of the hydraulic element, the magnetic flux tube is sleeved on the armature, the magnetic coil is sleeved on the magnetic flux tube, and the housing is sleeved on the magnetic coil. When energized, the armature moves downward, and under the action of electromagnetic force, it drives the push rod to move downward together to push the hydraulic element below. However, in the existing drive mechanism, when the armature and push rod move down, the starting speed and change speed are too fast. On the one hand, this will generate a large impact force, which will increase the probability of violent collisions of the internal components of the solenoid valve. On the other hand, it will cause the hydraulic oil in the solenoid valve to flow rapidly, resulting in violent fluctuations in system pressure, which will affect the damping effect of the shock absorber and reduce the comfort and handling of the vehicle.

[0004] Therefore, there is room for further improvement in the existing solenoid valve technology. Utility Model Content

[0005] In view of this, and addressing the technical problem in the prior art where the solenoid valve is driven too rapidly, leading to an increased probability of violent collisions among the internal components and resulting in poor control accuracy of the hydraulic components, this application provides a solenoid valve drive mechanism and a damping shock absorber. The drive mechanism is equipped with an elastic element to provide buffering when the drive mechanism is started, preventing the solenoid valve from starting suddenly, thereby reducing the probability of violent collisions among the internal components of the solenoid valve and increasing its control accuracy of the hydraulic components. When this solenoid valve is applied to a shock absorber, it enables the shock absorber to have a better damping adjustment effect.

[0006] In a first aspect, this application provides a solenoid valve driving mechanism, comprising: The armature is mounted on the outside of the push rod; The mounting base is fitted onto the side of the push rod closest to the hydraulic component and spaced apart from the armature; The elastic element is sleeved outside the push rod, with one end acting on the armature and the other end acting on the mounting base; The elastic element comprises n spring rings, and when the elastic element is in a compressed state, at least two spring rings are located on the same radial plane.

[0007] Compared with the prior art, the solenoid valve drive mechanism of this application is provided with an elastic element. The elastic element is sleeved outside the push rod and is located between the armature and the mounting base. One end of the elastic element acts on the armature and the other end acts on the mounting base, thereby generating an axial elastic force on the armature and the mounting base. When the push rod and the armature move together axially toward the mounting base to drive the hydraulic component, they will be subjected to a reverse force from the elastic element, so that the armature and the push rod will not suddenly move down, and the initial force on the hydraulic component will be relatively gentle, avoiding sudden start of the solenoid valve, thereby reducing the probability of violent collision of internal components of the solenoid valve and improving the control accuracy of the hydraulic component. In particular, in this application, when the elastic element is in a compressed state, at least two spring rings in the elastic element are located on the same radial plane, thereby giving the elastic element a large compression space and making the space it occupies after compression smaller. As a result, the space between the armature and the mounting base for installing the elastic element can be set smaller, thereby reducing the size of the solenoid valve.

[0008] Preferably, the elastic element includes: The first end fits against the bottom of the armature; The second end fits against the top of the mounting base and is positioned axially below the first end; Among them, at least two springs have different inner diameters, and the difference in inner diameter is greater than or equal to the diameter of the spring.

[0009] In this embodiment, at least two spring coils have different inner diameters, and the difference in inner diameter is greater than or equal to the diameter of the spring coils, so that the end with the larger inner diameter can accommodate the smaller end, thereby reducing the axial thickness of the elastic element after compression.

[0010] Preferably, the n spring coils are distributed at intervals along the axial direction, and adjacent spring coils are connected; Along the axial direction, the inner diameter of the spring ring gradually increases or decreases from top to bottom.

[0011] In this embodiment, the elastic element is an inverted conical structure or a regular conical structure, so that when all the spring rings are compressed by axial force, the inner ring of the large inner diameter spring ring can accommodate the small inner diameter spring ring, so that the elastic element has a small axial thickness after being compressed under axial force.

[0012] Preferably, when the elastic element is in its initial state, the axial height between the first end and the second end is H1, the radius difference between the first end and the second end is R, and the diameter of the spring ring is r, where H1≥nr, R≥nr, and n≥2.

[0013] In this embodiment, the structure is designed such that the elastic element has a large axial height in the initial state, so that the elastic element can fully interact with the armature and the mounting base, ensuring the effectiveness of the push rod buffer.

[0014] Preferably, when the elastic element is in a compressed state, the n spring rings, the first end, and the second end are on the same radial plane; The axial height of the elastic element is H2, where H2 = r.

[0015] In this embodiment, after the elastic element is fully compressed, all the spring rings are located on the same plane, resulting in a more uniform force on the armature and mounting base. This ensures the uniformity of the force on the push rod, making the solenoid valve run more smoothly.

[0016] Preferably, the inner diameter of the first end is smaller than the outer diameter of the second end; Wherein, the inner diameter of the first end is greater than the outer diameter of the armature, but less than the outer diameter of the armature; The inner diameter of the second end is larger than the inner diameter of the mounting base and smaller than the outer diameter of the mounting base.

[0017] In this embodiment, the elastic element is a conical structure. The inner diameters of the first end and the second end are set under these conditions so that the first end and the second end can fully act on the armature and the mounting base, thereby ensuring the effectiveness of the elastic element.

[0018] Preferably, the inner diameter of the first end is larger than the outer diameter of the second end; Wherein, the inner diameter of the first end is greater than the outer diameter of the armature, but less than the outer diameter of the armature; The inner diameter of the second end is larger than the inner diameter of the mounting base and smaller than the outer diameter of the mounting base.

[0019] In this embodiment, the elastic element is an inverted conical structure. The inner diameters of the first end and the second end are set under these conditions so that the first end and the second end can fully act on the armature and the mounting base, thereby ensuring the effectiveness of the elastic element.

[0020] Preferably, the bottom of the armature is a plane, and the top of the first end abuts against the plane; The top of the mounting base is a flat surface, and the bottom of the second end abuts against the flat surface.

[0021] In this embodiment, the end faces of the armature, mounting base, and elastic element are all set as planes to ensure the stability of contact with the elastic element, thereby improving the smoothness of the interaction between the elastic element and the armature and mounting base.

[0022] Preferably, the elastic element is made of a metal material; The elastic element is made of any one of the following materials: spring steel, stainless steel, or copper alloy.

[0023] In this embodiment, the elastic element is made of metal, which gives it good strength and high fatigue life.

[0024] Preferred options also include: The outer casing has a working cavity; A flux cap is located inside the working chamber; The flux tube is located inside the working chamber and at the bottom of the flux cap; it has an inner cavity for mounting the push rod. A magnetic coil is fitted around the outside of a flux tube; The armature and mounting base are located inside the inner cavity, and the lower end of the push rod passes through the mounting base and interacts with the hydraulic components.

[0025] Secondly, this application also provides a damping shock absorber, which includes the solenoid valve drive mechanism in any embodiment provided in the first aspect; in this application, the solenoid valve drive mechanism in the damping shock absorber can provide a relatively stable and gentle driving force, so that the hydraulic oil flow rate in the damping shock absorber will not change suddenly, and will not cause the system pressure in the shock absorber to fluctuate violently, thereby improving the damping effect of the shock absorber. Attached Figure Description

[0026] Figure 1 This is a partial cross-sectional structural schematic diagram of a solenoid valve drive mechanism provided in an embodiment of this application; Figure 2 yes Figure 1 A magnified view of part A.

[0027] Reference numerals in the attached drawings: 1. Outer shell; 2. Magnetic flux cap; 3. Magnetic flux tube; 4. Push rod; 5. Magnetic coil; 6. Armature; 7. Elastic element; 8. Mounting base; 71. Spring ring; 72. First end; 73. Second end. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0029] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0031] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 2 illustrate.

[0032] First aspect This application provides a solenoid valve drive mechanism (hereinafter referred to as the drive mechanism), which is used to generate axial driving force to drive the hydraulic components of the solenoid valve to operate, thereby realizing the automated control of the solenoid valve on / off or flow direction of fluid.

[0033] Specifically, such as Figure 1 As shown, the drive mechanism includes a housing 1, a magnetic cap 2, a magnetic tube 3, an armature 6, a magnetic coil 5, a mounting base 8, and a push rod 4. The housing 1 has a working cavity, within which the magnetic cap 2, magnetic coil 5, and magnetic cap 6 are disposed. The magnetic coil 5 is sleeved around the magnetic tube 3. The magnetic cap 2 is located at the top of the working cavity, and the magnetic tube 3 is located at the bottom of the magnetic cap 2. The bottom of the magnetic cap 2 is a hydraulic component of the solenoid valve. The magnetic tube 3 has an inner cavity, within which the armature 6, push rod 4, and mounting base 8 are located. The base 8 is located in the inner cavity, and the armature 6 and the mounting base 8 are sleeved on the outside of the push rod 4. The mounting base 8 is spaced at the lower axial end of the armature 6 and is fixedly connected to the magnetic flux tube 3. The push rod 4 and the armature 6 can move up and down axially within the inner cavity of the magnetic flux tube 3. The bottom of the push rod 4 passes through the mounting base 8 and acts on the hydraulic element to apply an axial force to the hydraulic element, thereby realizing the change of the flow rate and direction of the hydraulic oil in the solenoid valve, so that the solenoid valve can achieve damping control.

[0034] In this application, as Figures 1 to 2As shown, the drive mechanism also includes an elastic element 7, which is elastic. The elastic element 7 is sleeved on the push rod 4 and located between the armature 6 and the mounting base 8. The upper end of the elastic element 7 abuts against the bottom of the armature 6, and the lower end of the elastic element 7 abuts against the top of the mounting base 8, thereby generating axially opposite forces on the armature 6 and the mounting base 8. When the push rod 4 and the armature 6 move together axially toward the mounting base 8 to drive the hydraulic components, they will be subjected to an axially upward force from the elastic element 7, reducing the rapid downward movement of the push rod 4. This prevents the armature 6 and the push rod 4 from suddenly moving downward, resulting in a gentler initial force on the hydraulic components. This avoids sudden changes in the hydraulic components and prevents the solenoid valve from suddenly starting, thereby reducing the probability of violent collisions of the internal components of the solenoid valve and increasing its damping effect, thus improving vehicle comfort and handling.

[0035] Among them, such as Figure 2 As shown, the elastic element 7 includes n spring rings 71 of the same diameter, each spring ring 71 having a circular cross-section, where n≥2, and the diameter of the spring ring 71 is r. The n spring rings 71 are distributed axially at intervals, and adjacent spring rings 71 are connected to each other to form a spiral structure. One end of the spring ring 71 located in the middle is connected to the spring ring 71 above it, and the other end is connected to the spring ring 71 below it. In this embodiment, at least two spring rings 71 have different inner diameters, and the difference in inner diameter Δr≥r, so that when the elastic element 7 is compressed by axial force, the interior of the spring ring 71 with a larger inner diameter can accommodate the smaller spring ring 71, so that at least two spring rings 71 are located on the same radial plane, thereby reducing the axial thickness of the elastic element 7 after compression. That is, the elastic element 7 has a larger compression space and occupies less space after compression. Consequently, the space between the armature 6 and the mounting base 8 for installing the elastic element 7 can be set smaller, thereby reducing the size of the solenoid valve and making the solenoid valve occupy less space.

[0036] In this embodiment, when Δr>r, the two spring rings 71 do not interfere with each other during the entire compression process. That is, after compression, although the two spring rings 71 are on the same radial plane, they have a radial gap between them, which can reduce the friction between the spring rings 71 and improve the service life of the elastic element 7. When Δr=r, after compression, although the two spring rings 71 are on the same radial plane, they are attached to each other. That is, the outer wall surface of the spring ring 71 with the smaller inner diameter is attached to the inner wall surface of the spring ring 71 with the larger inner diameter. This can reduce the radial width of the entire elastic element 7, thereby reducing the required space of the elastic element 7 and thus reducing the overall volume of the solenoid valve.

[0037] In this application, the elastic element 7 is made of a metallic material, which can be any one of spring steel, stainless steel, or copper alloy, so that the elastic element 7 has good strength and high fatigue life.

[0038] Furthermore, such as Figure 2 As shown, the top of the elastic element 7 is the first end 72, and the bottom is the second end 73. The first end 72 is the spring ring 71 at the top of the elastic element 7, and the second end 73 is the spring ring 71 at the bottom of the elastic element 7. The top of the first end 72 abuts and fits against the bottom of the armature 6, and the bottom of the armature 6 is set as a plane to ensure the stability of the contact surface between the elastic element 7 and the armature 6, thereby improving the smoothness of the action of the elastic element 7 on the armature 6. The bottom of the second end 73 abuts and fits against the top of the mounting base 8, and the top of the mounting base 8 is set as a plane to ensure the stability of the contact surface between the elastic element 7 and the mounting base 8, thereby improving the smoothness of the action of the elastic element 7 on the mounting base 8. This allows the drive mechanism to provide a stable buffer force for the displacement of the push rod 4, ensuring the working stability of the solenoid valve.

[0039] In an optional embodiment of this application, such as Figure 2 As shown, the inner diameter of the first end 72 is smaller than the outer diameter of the second end 73. Along the axial direction, the inner diameter of the spring ring 71 gradually increases from top to bottom, so that the elastic element 7 forms a positive conical structure. The inner diameter of the first end 72 is larger than the outer diameter of the armature 6 and smaller than the outer diameter of the armature 6. The inner diameter of the second end 73 is larger than the inner diameter of the mounting base 8 and smaller than the outer diameter of the mounting base 8. This ensures that the first end 72 and the second end 73 can fully and completely act on the armature 6 and the mounting base 8, thereby ensuring the effectiveness of the elastic element 7.

[0040] The elastic element 7 includes an initial state and a compressed state. The initial state is when the elastic element 7 is completely free from axial force, and the compressed state is when the elastic element 7 is fully compressed by axial force. When the elastic element 7 is in its initial state, such as Figure 2 As shown, the axial height between the first end 72 and the second end 73 is H1, the radius difference between the first end 72 and the second end 73 is R, and the diameter of the spring ring 71 is r, where H1≥nr and R≥nr. This makes the elastic element 7 have a large axial height and sufficient elastic compression space in the initial state, so that the elastic element 7 can fully interact with the armature 6 and the mounting base 8 even in the initial state, ensuring the timeliness and effectiveness of the buffering of the push rod 4, and improving the flexibility and control accuracy of the solenoid valve. When the elastic element 7 is in a compressed state, since R≥nr and the elastic element 7 is a conical structure, after the elastic element 7 is fully compressed, the n spring rings 71, the first end 72 and the second end 73 are on the same radial plane. At this time, the axial height of the elastic element 7 is H2, H2=r, which makes the thickness of the elastic element 7 after compression smaller. The thickness of the elastic element 7 after compression is the thickness of a single spring ring 71, so there is no need to reserve too much space for the elastic element 7 after compression, further reducing the installation volume of the solenoid valve. On the other hand, after all the spring rings 71 are on the same plane, the force on the armature 6 and the mounting base 8 is more uniform, which can ensure the uniformity of the force on the push rod 4, so that the solenoid valve runs more smoothly. Moreover, the force is all located on the same plane, and the force on the armature 6 and the mounting base 8 is more concentrated and maximized, which makes the armature 6 and the push rod 4 have better reset performance. Only a small force is needed to reset the push rod 4, which helps to save resources.

[0041] Meanwhile, when the elastic element 7 is a conical structure, when the elastic element 7 is subjected to axial force, its structural characteristics cause the spring ring 71 to displace axially and not tilt outward or inward. This eliminates the need to set a mounting groove on the armature 6 or mounting base 8 to install the elastic element 7, thereby reducing the processing difficulty of the armature 6 and mounting base 8, and avoiding the mounting groove from affecting the electromagnetic force of the drive mechanism.

[0042] In another optional embodiment of this application, the elastic element 7 has an inverted conical structure, with the inner diameter of its first end 72 being larger than the outer diameter of its second end 73. Along the axial direction, the inner diameter of the spring ring 71 gradually decreases from top to bottom. The inner diameter of its first end 72 is larger than the outer diameter of the armature 6 but smaller than the outer diameter of the armature 6. The inner diameter of its second end 73 is larger than the inner diameter of the mounting base 8 but smaller than the outer diameter of the mounting base 8. The working principle of the elastic element 7 in this embodiment is the same as that of the conical elastic element 7, and the overall size and proportions of the elastic element 7 are also the same, achieving the same technical effect. Further details are omitted here.

[0043] Second aspect This application provides a damping shock absorber, which includes the solenoid valve drive mechanism in any embodiment of the first aspect. In this application, the solenoid valve drive mechanism in the damping shock absorber can provide a relatively stable and gentle driving force, so that the hydraulic oil flow rate in the damping shock absorber will not change suddenly, and will not cause drastic fluctuations in the system pressure in the shock absorber, thereby improving the damping effect of the shock absorber.

[0044] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0045] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A solenoid valve drive mechanism, characterized in that, include: The armature (6) is fitted outside the push rod (4); The mounting base (8) is sleeved on the side of the push rod (4) near the hydraulic component and spaced apart from the armature (6); The elastic element (7) is sleeved outside the push rod (4), with one end acting on the armature (6) and the other end acting on the mounting base (8). The elastic element (7) includes n spring rings (71), and when the elastic element (7) is in a compressed state, at least two spring rings (71) are located on the same radial plane.

2. The solenoid valve drive mechanism according to claim 1, characterized in that, The elastic element (7) includes: The first end (72) is attached to the bottom of the armature (6); The second end (73) is attached to the top of the mounting base (8) and is located axially below the first end (72); Among them, at least two spring rings (71) have different inner diameters, and the difference in inner diameter is greater than or equal to the diameter of the spring ring (71).

3. The solenoid valve drive mechanism according to claim 1, characterized in that, n spring coils (71) are distributed at intervals along the axial direction, and adjacent spring coils (71) are connected; Along the axial direction, the inner diameter of the spring ring (71) gradually increases or decreases from top to bottom.

4. The solenoid valve driving mechanism according to claim 2, characterized in that, When the elastic element (7) is in the initial state, the axial height between the first end (72) and the second end (73) is H1, the radius difference between the first end (72) and the second end (73) is R, and the diameter of the elastic ring (71) is r, where H1≥nr, R≥nr, and n≥2.

5. The solenoid valve drive mechanism according to claim 4, characterized in that, When the elastic element (7) is in a compressed state, the n elastic rings (71), the first end (72) and the second end (73) are on the same radial plane; The axial height of the elastic element (7) is H2, where H2 = r.

6. The solenoid valve driving mechanism according to claim 2, characterized in that, The inner diameter of the first end (72) is smaller than the outer diameter of the second end (73); Wherein, the inner diameter of the first end (72) is greater than the outer diameter of the armature (6) and less than the outer diameter of the armature (6); The inner diameter of the second end (73) is greater than the inner diameter of the mounting base (8) and less than the outer diameter of the mounting base (8).

7. The solenoid valve drive mechanism according to claim 2, characterized in that, The inner diameter of the first end (72) is larger than the outer diameter of the second end (73); Wherein, the inner diameter of the first end (72) is greater than the outer diameter of the armature (6) and less than the outer diameter of the armature (6); The inner diameter of the second end (73) is greater than the inner diameter of the mounting base (8) and less than the outer diameter of the mounting base (8).

8. The solenoid valve drive mechanism according to claim 2, characterized in that, The bottom of the armature (6) is a flat surface, and the top of the first end (72) abuts against the flat surface; The top of the mounting base (8) is a flat surface, and the bottom of the second end (73) abuts against the flat surface.

9. The solenoid valve drive mechanism according to claim 1, characterized in that, Also includes: The outer shell (1) is provided with a working cavity; Magnetic flux cap (2) is installed inside the working chamber; The flux tube (3) is located inside the working chamber and at the bottom of the flux cap (2); it has an inner cavity for mounting the push rod (4); A magnetic coil (5) is sleeved outside the magnetic flux tube (3); The armature (6) and the mounting base (8) are located in the inner cavity, and the lower end of the push rod (4) passes through the mounting base (8) and interacts with the hydraulic components; And / or, The elastic element (7) is made of metal material; The elastic element (7) is made of any one of the following materials: spring steel, stainless steel, or copper alloy.

10. A damping shock absorber, characterized in that, Includes the solenoid valve drive mechanism as described in any one of claims 1 to 9.

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