Overflow valve for a shock absorber and shock absorber

Abstract

The application provides an overflow valve of a shock absorber and the shock absorber, and relates to the technical field of automobiles.The overflow valve of the shock absorber comprises a valve body, a hydraulic assembly arranged in the valve body, the hydraulic assembly comprising a valve sleeve provided with a main valve cavity and a secondary valve cavity, a valve core arranged in the secondary valve cavity, a first elastic element arranged between the valve sleeve and the valve core, a second elastic element connected to the valve core, and an electromagnetic assembly with an output end abutting against the second elastic element.The application can improve the sealing performance of the overflow valve, reduce the assembly requirements of parts, and improve the economic performance of products.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to an overflow valve for a shock absorber and a shock absorber. Background Technology

[0002] An overflow valve is a hydraulic pressure control valve, primarily used for constant pressure relief, pressure stabilization, system unloading, and safety protection. It can be applied to active shock absorbers in automobiles. Active shock absorbers, through the overflow valve, can form a hydraulic cylinder with controllable damping, allowing the vehicle to adapt to various road conditions. In existing technology, the valve port of the overflow valve is formed by the valve seat and leaf spring. This structure requires high perpendicularity in component assembly, increasing assembly costs. Furthermore, during the operation of the overflow valve, the push rod pushes the valve core, which must first overcome the spring force and then the leaf spring force as it approaches the valve port. This results in poor consistency of the resultant force on the valve core, leading to poor pressure control accuracy of the overflow valve. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an overflow valve and a shock absorber to solve the problems of high assembly requirements and poor pressure control accuracy of the overflow valve in the prior art.

[0004] To achieve the above and other related objectives, the present invention provides an overflow valve for a shock absorber, comprising:

[0005] Valve body;

[0006] A hydraulic assembly, disposed within the valve body, includes:

[0007] The valve sleeve has a main valve chamber and a secondary valve chamber;

[0008] The valve core is located within the secondary valve chamber;

[0009] A first elastic element is located between the valve sleeve and the valve core;

[0010] A second elastic element is connected to the valve core; and

[0011] An electromagnetic component, the output end of which abuts against the second elastic element.

[0012] In one embodiment of the present invention, the valve sleeve is provided with an oil passage hole, which connects the main valve chamber and the auxiliary valve chamber.

[0013] In one embodiment of the present invention, the secondary valve cavity is provided with a first valve sleeve end face, wherein the electromagnetic component pushes the second elastic element to drive the valve core to move toward the first valve sleeve end face.

[0014] In one embodiment of the present invention, the valve core is provided with a pilot cavity, the pilot cavity penetrates the valve core, the cavity opening end of the pilot cavity is located on the side away from the end face of the first valve sleeve, and the cavity bottom end of the pilot cavity is located on the side close to the end face of the first valve sleeve.

[0015] In one embodiment of the present invention, the second elastic element is located on one side of the upper cavity end of the valve core, and there is a gap between the second elastic element and the cavity end to form a valve port. After the electromagnetic component pushes the valve core to contact the end face of the first valve sleeve, it continues to push so that the second elastic element deforms to close the valve port.

[0016] In one embodiment of the present invention, the cross-sectional area of ​​the cavity opening is greater than the cross-sectional area of ​​the cavity bottom.

[0017] In one embodiment of the present invention, an annular groove is provided on the radially outer side of the first valve sleeve end face to form a second valve sleeve end face, and one end of the first elastic element abuts against the second valve sleeve end face.

[0018] In one embodiment of the present invention, the valve core is provided with an annular groove on the side near the end face of the first valve sleeve to form a first valve core end face, and the other end of the first elastic element abuts against the first valve core end face.

[0019] In one embodiment of the present invention, the hydraulic assembly further includes a retaining sleeve, the retaining sleeve being interference-fitted with the valve core, and the second elastic element being located between the retaining sleeve and the valve core.

[0020] The present invention also provides a shock absorber, including an overflow valve of the shock absorber as described in any one of the above-described embodiments.

[0021] As described above, the overflow valve and shock absorber of the present invention have the following beneficial effects: the present invention can improve the sealing performance of the overflow valve, and at the same time, the present invention can reduce the assembly process of parts, reduce the assembly requirements of parts, and improve the economic efficiency of the product. Attached Figure Description

[0022] Figure 1 The image shown is a cross-sectional view of the overflow valve of a shock absorber according to the present invention.

[0023] Figure 2 The image shown is a three-dimensional schematic diagram of a valve sleeve according to an embodiment of the present invention.

[0024] Figure 3 The image shown is a cross-sectional view of the valve core in one embodiment of the present invention.

[0025] Figure 4 The diagram shows the connection between the second elastic element and the valve core in one embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram showing another connection between the second elastic element and the valve core in one embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram showing another connection between the second elastic element and the valve core in one embodiment of the present invention.

[0028] Component designation explanation:

[0029] 100. Valve sleeve; 110. Main valve chamber; 111. Oil hole; 120. Secondary valve chamber; 121. First valve sleeve end face; 122. Second valve sleeve end face; 130. Oil passage hole;

[0030] 200, Valve core; 210, Pilot chamber; 211, Chamber opening end; 212, Chamber bottom end; 220, First valve core end face; 230, Second valve core end face; 240, Third valve core end face;

[0031] 300. First elastic element;

[0032] 400, Second elastic element; 401, Riveting point; 402, Through groove;

[0033] 500. Electromagnetic actuator;

[0034] 600. Fixing sleeve. Detailed Implementation

[0035] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. It should also be understood that the terminology used in the embodiments of the present invention is for describing specific implementation schemes and not for limiting the scope of protection of the present invention. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0036] Please see Figures 1 to 6It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0037] Please see Figures 1 to 6 This invention provides an overflow valve and a shock absorber, applicable to the automotive technology field, specifically to automotive shock absorption systems. This invention ensures the perpendicularity of component assembly, reduces assembly requirements, and improves product economy. Detailed descriptions are provided below using specific embodiments.

[0038] Please see Figure 1 As shown, Figure 1 The diagram shows a cross-sectional view of the relief valve of a shock absorber according to the present invention. In one embodiment of the present invention, the relief valve of the shock absorber may include a valve body, an electromagnetic component, and a hydraulic component. The hydraulic component may be disposed within the valve body, and the output end of the electromagnetic component may abut against the hydraulic component. In this embodiment, the hydraulic pressure of the relief valve can be proportionally controlled by controlling the magnitude of the electromagnetic force generated by the electromagnetic component.

[0039] Please see Figure 1 As shown, in one embodiment of the present invention, the hydraulic assembly may include a valve sleeve 100, a valve core 200, a first elastic element 300, and a second elastic element 400. The valve sleeve 100 may have a main valve chamber 110 and a secondary valve chamber 120. The valve core 200 may be located within the secondary valve chamber 120, and the valve core 200 may have a pilot chamber 210. The outer circular surface of the valve core 200 and the inner circular surface of the secondary valve chamber 120 may be in clearance fit. The first elastic element 300 may be located between the valve sleeve 100 and the valve core 200. The first elastic element 300 may be a cylindrical helical spring. The second elastic element 400 may be connected to the valve core 200. The second elastic element 400 may be a circular leaf spring. The second elastic element 400 is located at one end of the pilot chamber 210 to form a valve port; the other end of the pilot chamber 210 may face the oil passage 130. The output end of the electromagnetic component can be an electromagnetic push rod 500. The electromagnetic push rod 500 abuts against the second elastic element 400. The electromagnetic push rod 500 can push the second elastic element 400 and drive the valve core 200 to move axially.

[0040] Please see Figure 2 As shown, Figure 2 The diagram shows a perspective view of the valve sleeve 100 according to one embodiment of the present invention. In one embodiment, the valve sleeve 100 may be a rotating structure, and both the main valve chamber 110 and the auxiliary valve chamber 120 may be cylindrical cavities. The axis of the main valve chamber 110 and the axis of the auxiliary valve chamber 120 may be on the same straight line. In this embodiment, a plurality of oil holes 111 may be uniformly formed on the side wall of the main valve chamber 110, allowing high-pressure oil to enter the main valve chamber 110 through the oil holes 111. The valve sleeve 100 also has oil passage holes 130, which may be one or more. The oil passage holes 130 connect the main valve chamber 110 and the auxiliary valve chamber 120, allowing oil in the main valve chamber 110 to enter the auxiliary valve chamber 120 through the oil passage holes 130.

[0041] Please see Figure 1 , Figure 2 As shown, in one embodiment of the present invention, the secondary valve cavity 120 is provided with a first valve sleeve end face 121. The first valve sleeve end face 121 may be a circular end face, the center of which may be located on the axis of the secondary valve cavity 120. The ports of a plurality of oil passage holes 130 may be located inside the first valve sleeve end face 121, and the plurality of oil passage holes 130 may be centrally symmetrically distributed about the center of the first valve sleeve end face 121. An annular groove may be provided on the radially outer side of the first valve sleeve end face 121, thereby forming a second valve sleeve end face 122. One end of the first elastic element 300 may abut against the second valve sleeve end face 122. Thus, the second valve sleeve end face 122 and the annular groove can provide axial and radial limiting for one end of the first elastic element 300.

[0042] Please see Figure 3 As shown, Figure 3 The image shown is a cross-sectional view of the valve core 200 according to one embodiment of the present invention. In one embodiment, the valve core 200 may have an annular groove on the side near the first valve sleeve end face 121, thereby forming a first valve core end face 220. In this embodiment, the position of the first valve core end face 220 may correspond to the position of the first valve sleeve end face 121, and the other end of the first elastic element 300 may abut against the first valve core end face 220. Therefore, the first valve core end face 220 and the annular groove can provide axial and radial limiting for the other end of the first elastic element 300.

[0043] Please see Figure 3As shown, in one embodiment of the present invention, the pilot cavity 210 can penetrate the valve core 200, and the port end 211 of the pilot cavity 210 can be located on the side away from the first valve sleeve end face 121, while the bottom end 212 of the pilot cavity 210 can be located on the side close to the first valve sleeve end face 121. The second elastic element 400 can be located at the port of the port end 211, thereby forming a valve port. In this embodiment, along the radial direction of the pilot cavity 210, the cross-sectional area of ​​the port end 211 is larger than the cross-sectional area of ​​the bottom end 212, that is, the pilot cavity 210 is funnel-shaped, and the diameter gradually narrows from the port end 211 to the bottom end 212. Therefore, during the operation of the hydraulic assembly of the present invention, when a pressure shock occurs, the high-pressure oil flowing into the pilot cavity 210 can exert an axial force on the valve core 200, thereby pressing the valve core 200 onto the first valve sleeve end face 121. The above structural design can avoid additional leakage, thereby improving the stability of the product.

[0044] Please see Figure 3 As shown, in one embodiment of the present invention, the outer side of the port of the cavity end 211 can be the second valve core end face 230 of the valve core 200, and the outer side of the port of the cavity bottom end 212 can be the third valve core end face 240 of the valve core 200. A gap exists between the cavity end 211 and the second elastic element 400, that is, a gap may exist between the second valve core end face 230 and the second elastic element 400, and this gap is used to form a valve port. In this embodiment, the electromagnetic push rod 500 pushes the second elastic element 400, and the second elastic element 400 will drive the valve core 200 to move towards the first valve sleeve end face 121. When the port of the bottom end 212 of the cavity contacts the end face 121 of the first valve sleeve, that is, when the end face 240 of the third valve core contacts the end face 121 of the first valve sleeve, the electromagnetic push rod 500 will continue to push and compress the second elastic element 400, so that the second elastic element 400 deforms and contacts the port of the cavity end 211, that is, the deformed second elastic element 400 contacts the end face 230 of the second valve core, thereby closing the valve port of the pilot cavity 210.

[0045] Please see Figure 4 As shown, Figure 4This diagram illustrates the connection between the second elastic element 400 and the valve core 200 in one embodiment of the present invention. In one embodiment, the connection between the second elastic element 400 and the valve core 200 can be achieved by riveting. At the connection point between the second elastic element 400 and the valve core 200, multiple riveting points 401 can be evenly arranged circumferentially to restrict the axial movement of the second elastic element 400 along the valve core 200. In this embodiment, multiple through slots 402 are provided on the second elastic element 400, which can be used to adjust the rigidity of the second elastic element 400. When the electromagnetic push rod 500 acts on the center of the second elastic element 400, the edge portion of the second elastic element 400 remains stationary relative to the valve core 200, while its central portion deforms, thereby driving the valve core 200 to move along the axial direction and closing the valve port of the pilot cavity 210.

[0046] Please see Figure 5 As shown, Figure 5 This is shown as another schematic diagram illustrating the connection between the second elastic element 400 and the valve core 200 in one embodiment of the present invention. In one embodiment of the present invention, the hydraulic assembly further includes a fixing sleeve 600. The fixing sleeve 600 can form an interference fit with the valve core 200, and the mating surfaces can be the outer circular surface of the fixing sleeve 600 and the inner circular surface of the valve core 200. In this embodiment, the second elastic element 400 can be located between the end face of the fixing sleeve 600 and the second valve core end face 230 of the valve core 200, thus, the fixing sleeve 600 can fix the second elastic element 400 onto the valve core 200.

[0047] Please see Figure 6 As shown, Figure 6 This is a schematic diagram illustrating another connection between the second elastic element 400 and the valve core 200 in one embodiment of the present invention. In one embodiment of the present invention, the fixing sleeve 600 can form an interference fit with the valve core 200, and the mating surfaces can be the inner circular surface of the fixing sleeve 600 and the outer circular surface of the valve core 200. In this embodiment, the outer circular surface of the fixing sleeve 600 can form a clearance fit with the inner circular surface of the secondary valve cavity 120. A step can be provided at one end of the fixing sleeve 600 near the end face 230 of the second valve core, and the second elastic element 400 is located between the step and the end face 230 of the second valve core. Therefore, the fixing sleeve 600 can fix the second elastic element 400 to the valve core 200.

[0048] In one embodiment of the present invention, the connection between the second elastic element 400 and the valve core 200 can also be achieved by welding, interference fit, or other methods. For example, the second elastic element 400 can be directly welded to the valve core 200, or the second elastic element 400 can be directly formed with the inner circular surface of the valve core 200 by interference fit.

[0049] Please see Figures 1 to 3As shown, in one embodiment of the present invention, when the hydraulic assembly of the present invention is in operation, the electromagnetic push rod 500 first acts on the second elastic element 400, thereby pushing the valve core 200 to overcome the spring force of the first elastic element 300, so as to press the valve core 200 onto the first valve core end face 220. Under the continued action of the thrust of the electromagnetic push rod 500, the second elastic element 400 deforms and then contacts the second valve core end face 230, thereby closing the valve port of the pilot chamber 210. Oil can enter the pilot chamber 210 from the main valve chamber 110 through the oil passage. When the pressure of the oil can overcome the force of the electromagnetic push rod 500, the second elastic element 400 rebounds, the valve port of the pilot chamber 210 opens to overflow, and the pressure in the pilot chamber 210 decreases until the force on the second elastic element 400 is balanced, at which point the valve port of the pilot chamber 210 can be stabilized and the pressure remains constant.

[0050] Therefore, during operation, the valve core 200 is pushed by the electromagnetic push rod 500 until it contacts the end face 121 of the first valve sleeve. The gap between the second elastic element 400 and the end face 230 of the second valve core forms the valve port of the pilot cavity 210. The pressure controlled by the valve port is determined solely by the force of the electromagnetic push rod 500 and the elastic force of the second elastic element 400. The elastic force of the first elastic element 300 does not participate in the pressure balance. Therefore, by adjusting the magnitude of the force of the electromagnetic push rod 500, the oil pressure can be adjusted, thereby achieving proportional control of the oil pressure. This invention can improve the consistency of the valve port control pressure and improve the accuracy of the product.

[0051] The present invention also provides a shock absorber, which may include the relief valve of the aforementioned shock absorber. The shock absorber can adjust the pressure of the hydraulic system using the relief valve according to the load size. Specifically, the shock absorber can use the relief valve to adjust parameters such as resistance characteristics and amplitude stroke to adapt to various road conditions.

[0052] In summary, this invention provides an overflow valve and a shock absorber for a shock absorber, relating to the field of hydraulic technology. By integrating the valve seat into the valve core and machining it as a single piece, this invention reduces the number of hydraulic components in the overflow valve. This invention ensures the verticality of component assembly, reduces assembly steps, lowers assembly requirements, and improves product economy. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial applicability.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0054] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0055] The above description of the embodiments shown in this invention (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the invention to the precise forms disclosed herein. Although specific embodiments and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the invention, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the invention in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the invention.

Claims

1. An overflow valve for a shock absorber, characterized in that, include: Valve body; A hydraulic assembly, disposed within the valve body, includes: The valve sleeve has a main valve chamber and a secondary valve chamber, wherein the secondary valve chamber has a first valve sleeve end face; The valve core is located in the secondary valve cavity. The valve core has a pilot cavity that penetrates the valve core. The opening end of the pilot cavity is located on the side away from the end face of the first valve sleeve, and the bottom end of the pilot cavity is located on the side close to the end face of the first valve sleeve. The cross-sectional area of ​​the opening end is larger than the cross-sectional area of ​​the bottom end. A first elastic element is located between the valve sleeve and the valve core; A second elastic element is connected to the valve core and located on one side of the upper cavity end of the valve core. A gap exists between the second elastic element and the cavity end to form a valve port; and An electromagnetic component has its output end abutting against the second elastic element. The electromagnetic component pushes the second elastic element to drive the valve core toward the end face of the first valve sleeve. After the electromagnetic component pushes the valve core to contact the end face of the first valve sleeve, it continues to push the second elastic element to produce elastic deformation, so that the deformed second elastic element fits against the cavity end to close the valve port. When the pressure of the oil in the pilot chamber on the second elastic element and the elastic force generated by the deformation of the second elastic element are greater than the force exerted by the electromagnetic component on the second elastic element, the second elastic element rebounds, causing the valve port of the pilot chamber to open and overflow.

2. The overflow valve of the shock absorber according to claim 1, characterized in that, The valve sleeve is provided with an oil passage hole, which connects the main valve chamber and the auxiliary valve chamber.

3. The overflow valve of the shock absorber according to claim 1, characterized in that, An annular groove is provided on the radially outer side of the first valve sleeve end face to form a second valve sleeve end face, and one end of the first elastic element abuts against the second valve sleeve end face.

4. The overflow valve of the shock absorber according to claim 3, characterized in that, The valve core has an annular groove on the side near the end face of the first valve sleeve to form the end face of the first valve core, and the other end of the first elastic element abuts against the end face of the first valve core.

5. The overflow valve of the shock absorber according to claim 1, characterized in that, The hydraulic assembly also includes a retaining sleeve that is interference-fitted with the valve core, and the second elastic element is located between the retaining sleeve and the valve core.

6. A shock absorber, characterized in that, The overflow valve of the shock absorber as described in any one of claims 1 to 5.

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