Valve structure and shock absorber

Abstract

The utility model provides a valve structure and a shock absorber. The valve structure comprises a valve sleeve; the valve armature is located in the valve sleeve and is configured to do reciprocating motion in the axis direction of the valve armature; the valve rod penetrates through the valve armature and is fixedly connected with the valve armature, and the valve rod comprises a first part and a second part which are arranged at the two ends in the axis direction; the second part is exposed from the valve armature; the pilot valve is connected with the second part so as to drive the pilot valve to reciprocate in the axis direction through the second part; at least part of the valve armature is guided in the valve sleeve. In the valve structure, the valve armature is guided by the valve sleeve, so that the valve armature and the valve rod can reliably move in the axial direction without deviation.

Description

Technical Field

[0001] At least one embodiment of the utility model relates to a valve structure and a shock absorber. Background Art

[0002] The damping valve is a key component in the shock absorber and plays a vital role in the automobile suspension system. The solenoid valve in the damping valve can control and adjust the damping force to achieve the damping effect. However, the valve opening and closing method of the solenoid valve needs to be improved. Utility Model Content

[0003] At least one embodiment of the utility model provides a valve structure and a shock absorber.

[0004] At least one embodiment of the present utility model provides a valve structure, comprising: a valve sleeve; a valve armature, which is located in the valve sleeve and is configured to reciprocate along the axial direction of the valve armature; a valve stem, which passes through the valve armature and is fixedly connected to the valve armature, and the valve stem comprises a first part and a second part at both ends in the axial direction; the second part is exposed from the valve armature; a pilot valve, which is connected to the second part to drive the pilot valve to reciprocate along the axial direction through the second part; wherein at least a portion of the valve armature is guided in the valve sleeve.

[0005] For example, according to at least one embodiment of the present invention, the valve sleeve includes a valve sleeve body and a friction reduction layer; the friction reduction layer is arranged between the outer peripheral wall of the valve armature and the valve sleeve body, and at least part of the valve armature is guided in the friction reduction layer.

[0006] For example, according to at least one embodiment of the present invention, the material of the friction-reducing layer includes polytetrafluoroethylene.

[0007] For example, according to at least one embodiment of the present invention, the dimension of the friction-reducing layer in the axial direction is not less than the dimension of the valve armature in the axial direction.

[0008] For example, according to at least one embodiment of the present invention, the valve sleeve includes a shell part and a magnetic isolation part connected to each other along the axial direction; the inner diameter of the magnetic isolation part is smaller than the inner diameter of the shell part, and at least part of the valve armature is guided in the magnetic isolation part.

[0009] For example, according to at least one embodiment of the present invention, a portion of the second portion from the valve armature to the pilot valve is not guided by components adjacent to a periphery of the second portion.

[0010] For example, according to at least one embodiment of the present invention, a portion of the second portion from the valve armature to the pilot valve is spaced from surrounding adjacent components; and a dimension of the space in the radial direction of the valve stem is not less than 0.2 mm.

[0011] For example, according to at least one embodiment of the present invention, the valve structure also includes a valve cover and an elastic structure which are sleeved outside the second part, and the valve cover is connected to the valve sleeve; the valve cover includes a protrusion protruding toward the axis of the valve stem, and the elastic structure is connected between the protrusion and the valve armature along the axial direction; wherein the second part and the protrusion are adjacent to each other in the radial direction of the valve stem, and the second part is not guided by the protrusion.

[0012] For example, according to at least one embodiment of the present invention, the orthographic projection of the protrusion on a reference plane perpendicular to the axial direction includes a ring shape.

[0013] For example, according to at least one embodiment of the present invention, the valve structure also includes a valve cover and a mounting member which are sleeved outside the second part, and the valve cover is connected to the valve sleeve; the mounting member is arranged between the second part and the valve cover and is fixedly connected to the valve cover, and the elastic structure is connected between the mounting member and the valve armature along the axial direction; wherein the second part and the mounting member are adjacent to each other in the radial direction of the valve stem, and the second part is not guided by the mounting member.

[0014] For example, according to at least one embodiment of the present invention, the first portion is exposed from an end of the valve armature away from the second portion, the first portion and the valve sleeve are adjacent to each other in the radial direction of the valve stem, and the first portion is not guided by the valve sleeve.

[0015] For example, according to at least one embodiment of the present utility model, the valve structure also includes a sleeve that is sleeved outside the valve stem and connected to the valve sleeve; the first part is exposed from an end of the valve armature away from the second part, and the sleeve is arranged between the first part and the valve sleeve; wherein the first part is configured to be guided by the sleeve.

[0016] At least one embodiment of the utility model provides a shock absorber, comprising the valve structure described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0018] Figure 1A schematic structural diagram of a valve structure provided as an example in at least one embodiment of the utility model.

[0019] Figure 2 for Figure 1 A local enlarged schematic diagram of point A is shown. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0022] The features such as "vertical", "parallel" and "same" used in the present invention include the features such as "vertical", "parallel" and "same" in a strict sense, as well as the situations where "approximately vertical", "approximately parallel" and "approximately the same" contain certain errors, taking into account the errors associated with the measurement of specific quantities (that is, the limitations of the measurement system), and are expressed within the acceptable deviation range for specific values ​​determined by ordinary technicians in this field. The "center" in the embodiment of the present invention can include a position strictly located at the geometric center and a position approximately centered in a small area around the geometric center. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the value.

[0023] The role of the solenoid valve in the damping valve system is mainly to accurately control the size of the damping force or the opening and closing of the damping effect. The solenoid valve is a component that uses electromagnetic force to control the flow of fluid (such as hydraulic oil or gas). When the solenoid valve receives an electrical signal, the internal electromagnetic coil generates a magnetic field to drive the valve core to move, thereby changing the opening and closing state of the fluid flow channel or the size of the throttling aperture.

[0024] During the research, the inventors of the present application found that during the movement of the valve armature in the solenoid valve, guide sleeves need to be provided at both ends of the valve stem for guidance. In order to ensure the stability and reliability of the valve stem under long-term and complex working conditions, hardness treatment needs to be performed on the surface of the valve stem, resulting in a complex manufacturing process. In addition, in order to prevent assembly interference problems and to ensure reliable guidance of the valve stem by the guide sleeve, the guide sleeves provided at both ends of the valve stem need to ensure high concentricity, which leads to high precision requirements for the guide sleeves, increases manufacturing costs, and makes it difficult to improve product yield.

[0025] At least one embodiment of the utility model provides a valve structure and a shock absorber, the valve structure comprising: a valve sleeve; a valve armature, which is located in the valve sleeve and is configured to reciprocate along the axial direction of the valve armature; a valve stem, which penetrates the valve armature and is fixedly connected to the valve armature, and the valve stem comprises a first part and a second part at both ends in the axial direction; the second part is exposed from the valve armature; a pilot valve, which is connected to the second part to drive the pilot valve to reciprocate along the axial direction through the second part; wherein at least a portion of the valve armature is guided in the valve sleeve.

[0026] At least one embodiment of the utility model provides a valve structure and a shock absorber, in which the valve armature in the valve structure is fixedly connected to the valve stem, so that the reciprocating motion of the valve armature in the valve sleeve drives the valve stem to move, and then drives the pilot valve connected to the second part of the valve stem to reciprocate. At least part of the valve armature is guided by the valve sleeve, so that the valve armature and the valve stem can reliably move in the axial direction without deviation. At the same time, because the valve armature is guided by the valve sleeve, only the concentricity of the valve armature and the valve sleeve needs to be considered, which is conducive to reducing the difficulty of processing and manufacturing parts and improving product yield. In addition, there is no need to perform additional hardness treatment on the valve stem, which simplifies the manufacturing process and reduces costs.

[0027] The valve structure and the shock absorber are described below with reference to the accompanying drawings and through some embodiments.

[0028] Figure 1 A schematic structural diagram of a valve structure provided as an example in at least one embodiment of the utility model.

[0029] refer to Figure 1At least one embodiment of the present invention provides a valve structure, including: a valve sleeve 100, a valve armature 210, a valve stem 220 and a pilot valve 300. The valve armature 210 is located in the valve sleeve 100 and is configured to reciprocate along the axial direction Y of the valve armature 210. It can be understood that the valve armature 210 is located in the space surrounded by the valve sleeve 100. The valve stem 220 penetrates the valve armature 210 and is fixedly connected to the valve armature 210, and the valve stem 220 includes a first part 221 and a second part 222 at both ends in the axial direction Y. The second part 222 is exposed from the valve armature 210. For example, the first part 221 can be exposed from the end of the valve armature 210 away from the second part 222. It can be understood that the first part may not be exposed from the valve armature, and the present invention does not limit this.

[0030] refer to Figure 1 For example, on a plane perpendicular to the radial direction of the valve armature 210, the orthographic projection of the first portion 221 does not overlap with the orthographic projection of the valve armature 210. For example, on a plane perpendicular to the radial direction of the valve armature 210, the orthographic projection of the second portion 222 does not overlap with the orthographic projection of the valve armature 210. The pilot valve 300 is connected to the second portion 222, so that the pilot valve 300 is driven to reciprocate along the axial direction Y through the second portion 222. At least part of the valve armature 210 is guided in the valve sleeve 100. For example, the outer peripheral wall of the valve armature 210 and the inner peripheral wall of the valve sleeve 100 can be clearance-matched, so that the valve sleeve 100 guides the valve armature 210.

[0031] refer to Figure 1 The valve armature 210 in the valve structure is fixedly connected to the valve stem 220, so that the reciprocating motion of the valve armature 210 in the valve sleeve 100 drives the valve stem 220 to move, and then drives the pilot valve 300 connected to the second part 222 of the valve stem 220 to reciprocate. At least part of the valve armature 210 is guided by the valve sleeve 100, so that the valve armature 210 and the valve stem 220 can reliably move in the axial direction Y without deviation. At the same time, when the first part 221 and the second part 222 of the valve stem 220 are not subjected to radial support force, since the valve armature 210 is guided by the valve sleeve 100, only the concentricity of the valve armature 210 and the valve sleeve 100 needs to be considered, which is conducive to reducing the difficulty of processing and manufacturing parts and improving product yield. In addition, when the first part 221 and the second part 222 of the valve stem 220 are not subjected to radial support force, there is no need to consider the friction loss between the valve stem 220 and its surrounding adjacent parts, so there is no need for additional hardness treatment of the valve stem 220, which simplifies the manufacturing process and reduces costs.

[0032] For example, when the interval between the two parts is less than 0.2 mm, the part sleeved on the outside can guide the part inside. For example, the interval between the valve sleeve 100 and the valve armature 210 in the radial direction of the valve stem 220 is less than 0.2 mm, so that the valve sleeve 100 can guide the valve armature 210 to prevent the movement of the valve armature 210 from being offset. For example, the valve sleeve and the valve armature can be clearance-fitted or directly contacted.

[0033] Figure 2 for Figure 1 A local enlarged schematic diagram of point A is shown.

[0034] refer to Figure 1 and Figure 2 In some examples, the valve sleeve 100 includes a valve sleeve body 110 and a friction reduction layer 120, wherein the friction reduction layer 120 is disposed between the outer peripheral wall of the valve armature 210 and the valve sleeve body 110, and at least a portion of the valve armature 210 is guided in the friction reduction layer 120. For example, the friction reduction layer 120 can lubricate the valve armature 210 and the valve sleeve body 110 to reduce the friction between the valve armature 210 and the valve sleeve body 110. In addition, since the friction reduction layer 120 is disposed between the valve armature 210 and the valve sleeve body 110, there is no need to perform additional hardness treatment on the valve armature 210.

[0035] refer to Figure 1 and Figure 2 In some examples, the material of the friction-reducing layer 120 includes polytetrafluoroethylene. The friction coefficient of polytetrafluoroethylene is extremely low, so that the friction between the valve armature 210 and the valve sleeve body 110 can be reduced, so that the valve armature 210 reciprocates more smoothly and reduces abnormal noise. For example, the friction-reducing layer can be Teflon cloth. For example, the friction-reducing layer can also be a friction-reducing material layer coated on the outer wall of the valve armature or the inner wall of the valve sleeve body. However, according to the embodiments of the present invention, it is not limited to this, and the material of the friction-reducing layer can also include other friction-reducing materials, which are not limited here.

[0036] refer to Figure 1 and Figure 2 In some examples, the size of the friction-reducing layer 120 in the axial direction Y is not less than the size of the valve armature 210 in the axial direction Y. For example, the size of the friction-reducing layer 120 in the axial direction Y may be greater than the size of the valve armature 210 in the axial direction Y. For example, the size of the friction-reducing layer in the axial direction may be equal to the size of the valve armature in the axial direction. For example, the friction-reducing layer may be coated on the outer periphery of the valve armature, and when the valve armature reciprocates, the friction-reducing layer may move synchronously with the valve armature to reduce the friction between the valve armature and the valve sleeve body, and also reduce abnormal noise. For example, the friction-reducing layer may be fixed on the inner circumferential wall of the valve sleeve body, that is, the friction-reducing layer may not move synchronously with the valve armature.

[0037] refer to Figure 1 and Figure 2 In some examples, the valve sleeve 100 includes a housing portion 101 and a magnetic isolation portion 102 connected to each other along the axial direction; the inner diameter of the magnetic isolation portion 102 is smaller than the inner diameter of the housing portion 101, and at least part of the valve armature 210 is guided in the magnetic isolation portion 102. For example, the magnetic isolation portion may protrude relative to the housing portion in the radial direction, so that the valve armature is guided by the protruding magnetic isolation portion. For example, the material of the magnetic isolation portion may include a friction-reducing material, so as to reduce the friction between the magnetic isolation portion and the valve armature.

[0038] In some examples, the valve structure further includes a shaft sleeve that is sleeved outside the valve stem and connected to the valve sleeve, and the shaft sleeve is disposed between the first portion of the valve stem and the valve sleeve. The first portion is configured to be guided by the shaft sleeve. For example, the first portion can be in clearance fit with the shaft sleeve. By arranging a shaft sleeve at the end of the valve stem away from the pilot valve, the valve stem can be assisted in guiding by the shaft sleeve. For example, while the magnetic isolation portion is arranged to guide the valve armature, the shaft sleeve can be arranged to assisted in guiding the valve stem, thereby guiding the valve armature and the valve stem at the same time to prevent the valve stem from deflecting during movement.

[0039] For example, when the interval between the two parts is not less than 0.2 mm, the part sleeved on the outside can guide the part inside. For example, when the interval between the two parts is equal to 0.2 mm or greater than 0.2 mm, the part sleeved on the outside cannot guide the part inside.

[0040] refer to Figure 1 and Figure 2 In some examples, the first portion 221 and the valve sleeve 100 are adjacent to each other in the radial direction of the valve stem 220, and the first portion 221 is not guided by the valve sleeve 100. For example, the first portion 221 and the valve sleeve 100 are spaced apart in the radial direction, the first portion 221 and the valve sleeve 100 are not in contact, and no other components are provided between the first portion 221 and the valve sleeve 100, and the first portion 221 will not be subjected to radial support force from the valve sleeve 100 or other components in the radial direction. For example, the radial spacing dimension between the first portion 221 and the valve sleeve 100 may be not less than 0.2 mm. In addition, if there is a spacing between the first portion 221 and the valve sleeve 100, the requirements for the manufacturing precision of the parts of the first portion 221 and the valve sleeve 100 can be reduced, thereby improving the product yield of the valve structure.

[0041] refer to Figure 1 and Figure 2 In some examples, the portion 222a of the second portion 222 from the valve armature 210 to the pilot valve 300 is not guided by components adjacent to the periphery of the second portion 222. Thus, the second portion 222 is not subjected to radial support force.

[0042] refer to Figure 1 and Figure 2 In some examples, the second part 222 has a gap between the portion 222a from the valve armature 210 to the pilot valve 300 and the surrounding adjacent components. For example, the size of the gap in the radial direction of the valve stem 210 is not less than 0.2 mm. For example, the size of the gap in the radial direction of the valve stem 210 can be equal to 0.2 mm. For example, the size of the gap in the radial direction of the valve stem 210 can be greater than 0.2 mm. For example, the end of the second part 222 extending from the valve armature 210 away from the valve armature 210 is connected to the pilot valve 300, and the outer periphery of the portion 222a of the second part 222 between the pilot valve 300 and the valve armature 210 is surrounded by a gap. As a result, the second part 222 is not subjected to radial support force, and there is no need to consider the friction force generated between the valve stem 220 and the surrounding adjacent components during the reciprocating motion, so there is no need to perform hardness treatment on the second part 222, which simplifies the manufacturing process and reduces costs.

[0043] refer to Figure 1 and Figure 2 In some examples, the valve structure further includes a valve cover 400 and an elastic structure (e.g., a first elastic structure 231) sleeved outside the second portion 222, and the valve cover 400 is connected to the valve sleeve 100. For example, the valve structure may further include a coil 240 disposed around a portion of the valve sleeve 100, and the coil 240 may generate a magnetic field inside the coil 240 according to the principle of electromagnetic induction, thereby driving the valve armature 210 to move along the axial direction Y, and after the coil 240 is powered off, the valve armature 210 may be reset by the elastic force of the elastic structure. For example, the valve cover 400 may be embedded in the valve sleeve 100. For example, the valve cover may have an interference fit with the valve sleeve. For example, the valve cover may be threadedly connected to the valve sleeve. For example, the valve structure may further include an elastic structure (e.g., a second elastic structure 232) sleeved outside the valve armature 210 and close to one end of the first portion 221. The second elastic structure 232 may be connected between the valve armature 210 and the valve sleeve 100 along the axial direction Y, thereby providing the valve armature 210 with an elastic force for resetting the valve armature 210. Of course, only one or more elastic components may be provided in the valve structure, as long as the elastic force for resetting the valve armature can be provided, and the present invention is not limited thereto.

[0044] In some examples, the valve cover includes a protrusion protruding toward the axis of the valve stem, and the elastic structure is connected between the protrusion and the valve armature along the axial direction. By providing a protrusion protruding from the inner wall of the valve cover, it is possible to provide an installation position for the elastic structure, so that the elastic structure can be connected between the protrusion and the valve armature, and provide the valve armature with an elastic force for resetting. The second part and the protrusion are adjacent to each other in the radial direction of the valve stem, and the second part is not guided by the protrusion. For example, the second part and the protrusion may have a gap in the radial direction of the valve stem, and the size of the gap in the radial direction is not less than 0.2 mm. For example, the second part does not contact the protrusion, and no other components are arranged between the second part and the protrusion, and the second part will not be subjected to the radial support force of the protrusion or other components in the radial direction. In addition, there is a gap between the second part and the protrusion, so the manufacturing precision requirements of the parts of the second part and the protrusion can be reduced, thereby improving the product yield of the valve structure.

[0045] In some examples, the orthographic projection of the protrusion on the reference plane perpendicular to the axial direction includes a ring shape, thereby providing a more uniform support force for the elastic structure. Of course, in some other examples, the protrusion can also be set as a discontinuous structure, as long as it can provide an installation position for the elastic structure, and the utility model does not limit this.

[0046] refer to Figure 1 and Figure 2In some examples, the valve structure further includes a valve cover 400 and a mounting member 500 sleeved outside the second portion 222, and the valve cover 400 is connected to the valve sleeve 100. The mounting member 500 is disposed between the second portion 222 and the valve cover 400 and is fixedly connected to the valve cover 400. For example, the mounting member 500 may be interference fit with the valve cover 400. The elastic structure is connected between the mounting member 500 and the valve armature 210 along the axial direction Y, so that the mounting member 500 provides a mounting position for the elastic structure, so that the elastic structure provides an elastic force for resetting the valve armature 210. The second portion 222 and the mounting member 500 are adjacent to each other in the radial direction of the valve stem 220, and the second portion 222 is not guided by the mounting member 500. For example, the second portion 222 and the mounting member 500 may have a gap in the radial direction, and the size of the gap in the radial direction is not less than 0.2 mm. For example, the second portion 222 is not in contact with the mounting member 500, and no other components are arranged between the second portion 222 and the mounting member 500, and the second portion 222 will not be subjected to radial support force of the mounting member 500 or other components in the radial direction. In addition, there is a gap between the second portion 222 and the mounting member 500, so the manufacturing precision requirements of the second portion 222 and the mounting member 500 can be reduced, thereby improving the product yield of the valve structure. It should be noted that the inner diameter of the mounting member 500 can be larger than the outer diameter of the valve stem 220. Even if the inner surface of the mounting member 500 may be in contact with the valve stem 200 in some cases, the mounting member 500 will not play a substantial guiding role on the valve stem 220. Therefore, the outer surface of the second portion 222 of the valve stem 200 does not need to be hardened, thereby reducing costs.

[0047] From the above description, it can be seen that the moving parts in the electromagnetic brake part of the valve structure according to the embodiment of the utility model are guided solely or mainly by the cooperation between the valve armature and the valve sleeve in contact therewith, thereby avoiding the process of hardening the valve stem in order to guide the valve stem. In addition, since the valve armature and the valve stem are fixedly connected, and the valve armature has a larger diameter, the movement of the entire moving part can be made more stable by guiding the valve armature. In some embodiments, a friction-reducing layer is also coated or provided on the part in contact with the valve armature and the valve sleeve, and the friction-reducing layer can reduce friction and reduce noise generated during movement. In addition, since the inner diameter of the valve sleeve is relatively large, it is easier to apply the friction-reducing layer, thereby reducing the process difficulty and reducing costs.

[0048] refer to Figure 1 and Figure 2For example, the valve structure further includes a main valve sleeve 610, a main valve core 620 and a valve seat 630. The valve seat 630 is arranged relative to the valve sleeve 100 along the axial direction Y. The main valve sleeve 610 is connected between the valve sleeve 100 and the valve seat 630. For example, the main valve sleeve can be interference fit with the valve seat. For example, the main valve sleeve can be riveted to the valve seat. For example, the main valve core 620 is located in the main valve sleeve 610 and can reciprocate along the axial direction Y, and the pilot valve 300 and the main valve core 620 are arranged relative to each other in the axial direction Y. For example, the main valve core 620 can move in the main valve sleeve 610 according to the damping force applied by the damping medium. For example, the damping medium can be a damping liquid. For example, the valve armature 210 can reciprocate in the valve sleeve 100, thereby driving the pilot valve 300 on the valve stem 220 to move toward or away from the main valve core 620 to adjust the damping force in the valve structure.

[0049] refer to Figure 1 and Figure 2 For example, the main valve sleeve 610 is configured to support the main valve core 620 and the main valve sleeve 610 is an integral structure. A first channel 611 is provided in the main valve sleeve 610 so that the damping medium can be discharged from the valve structure through the first channel 611. Since the main valve sleeve 610 is an integral structure and the main valve sleeve 610 is used to fix the valve seat 630 while supporting the main valve core 620, the number of parts in the valve structure can be reduced, the assembly process can be simplified, the cumulative error of the assembly parts can be reduced, and the product yield can be improved.

[0050] refer to Figure 1 and Figure 2 For example, the main valve sleeve 610 includes a cylindrical body portion 601 and a support portion 602 that divides a receiving cavity 6011 of the cylindrical body portion 601 into two parts along the axial direction Y. The valve sleeve 100 is sleeved outside the cylindrical body portion 601 and has an interference fit with the cylindrical body portion 601. One end of the cylindrical body portion 601 away from the valve sleeve 100 extends along the axial direction Y to connect with the valve seat 630, and one end of the cylindrical body portion 601 away from the valve sleeve 100 is exposed from the valve sleeve 100.

[0051] refer to Figure 1 and Figure 2 For example, the support portion 602 is provided with a guide hole 6021 penetrating the support portion 602 along the axial direction Y, and the guide hole 6021 and the cylindrical body portion 601 are configured to jointly support the main valve core 620 and guide the movement of the main valve core 620. For example, a part of the structure of the main valve core 620 is clearance-matched with the guide hole 6021. For example, a part of the structure of the main valve core 620 is slidingly matched with the cylindrical body portion 601. Thus, the main valve core 620 is jointly guided by the guide hole 6021 and the cylindrical body portion 601, and the movement of the main valve core 620 is prevented from being deviated.

[0052] refer to Figure 1 and Figure 2For example, the accommodating chamber 6011 includes a first chamber 061 and a second chamber 062 that are connected to each other, the first chamber 061 is located between the support portion 602 and the valve seat 630, and the second chamber 062 is located between the support portion 602 and the valve sleeve 100. The main valve core 620 is configured to reciprocate along the axial direction Y in the first chamber 061, and the pilot valve 300 is configured to reciprocate along the axial direction Y in the second chamber 062. For example, the guide hole 6021 is connected between the first chamber 061 and the second chamber 062. For example, the first chamber 061 is a chamber close to the lower part of the main valve sleeve 610, and the second chamber 062 is a chamber close to the upper part of the main valve sleeve 610.

[0053] refer to Figure 1 and Figure 2 For example, the main valve core 620 includes a first portion 621 and a second portion 622 connected to each other, and the first portion 621 is configured to slide with the cylindrical main body portion 601. For example, a sealing ring 640 is sleeved on the first portion 621. The second portion 622 extends along the axial direction Y to extend into the guide hole 6021, so as to be guided by the guide hole 6021. For example, the first portion 621 divides the first cavity 061 into a first sub-cavity 01 and a second sub-cavity 02. For example, the main valve core 620 moves in the axial direction Y to change the volume of the first sub-cavity 01 and the second sub-cavity 02 to change the damping force of the valve structure. The first portion 621 is provided with a through hole 6211 that penetrates the first portion 621, so as to connect the first sub-cavity 01 and the second sub-cavity 02 through the through hole 6211. The first sub-cavity 01 is located between the first portion 621 and the support portion 602, and the second sub-cavity 02 is located between the first portion 621 and the valve seat 630.

[0054] refer to Figure 1 and Figure 2 For example, the first channel 611 is disposed in the cylindrical main body 601, and the first channel 611 connects the second cavity 062 and the external space, so that the damping medium flows out from the second cavity 062 to the external space through the first channel 611. For example, the first channel can directly connect the second cavity 062 and the external space, or can be indirectly connected to the external space through other channels.

[0055] refer to Figure 1 and Figure 2 For example, the valve seat 630 is provided with a second channel 631, and the second channel 631 is configured to connect the first channel 611 and the external space. For example, the second channel 631 penetrates the valve seat 630 and extends along the axial direction Y. For example, the damping medium can flow out from the first channel 611 to the external space through the second channel 631. On a reference plane perpendicular to the axial direction Y, the area of ​​the orthographic projection of the first channel 611 is not greater than the area of ​​the orthographic projection of the second channel 631, so that the damping medium can flow out through the second channel 631 without being throttled.

[0056] refer to Figure 1 and Figure 2 For example, an adjusting member 700 is provided between the valve seat 630 and the main valve sleeve 610, and the adjusting member 700 can compensate for the cumulative assembly error of the parts by the size in the axial direction Y, thereby providing a suitable installation position for the valve seat 630. After the valve seat 630 is installed, the valve structure is in the initial state after installation, and the valve seat 630 can abut against the surface of the main valve core 620 while abutting against the surface of the adjusting member 700, and the elastic structure is in a suitable stress state. For example, the adjusting member 700 can be an annular gasket.

[0057] refer to Figure 1 and Figure 2 For example, the inner wall of the main valve sleeve 610 is provided with a step portion 130. The step portion 130 includes a positioning surface 131 facing the valve seat 630 in the axial direction Y, so that the adjusting member 700 is supported by the positioning surface 131. For example, the step portion 130 is a substantially annular continuous structure, so that the step portion 130 provides a more uniform supporting force for the adjusting member 700 in the circumferential direction.

[0058] At least one embodiment of the utility model provides a shock absorber, comprising the valve structure of any of the above embodiments.

[0059] Since the valve structure according to the embodiment of the utility model is used for the above-mentioned shock absorber, it also has corresponding beneficial technical effects, which will not be described in detail here.

[0060] There are a few points to note:

[0061] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the conventional designs.

[0062] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present invention may be combined with each other.

[0063] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A valve structure, characterized in that: include: Valve sleeve; A valve armature, located in the valve sleeve and configured to reciprocate along the axis direction of the valve armature; A valve stem, the valve stem passes through the valve armature and is fixedly connected to the valve armature, the valve stem comprising a first portion and a second portion at both ends in the axial direction; the second portion is exposed from the valve armature; A pilot valve connected to the second part so as to drive the pilot valve to reciprocate along the axis direction through the second part; Therein, at least parts of the valve armature are guided in the valve sleeve.

2. The valve structure according to claim 1, characterized in that: The valve sleeve comprises a valve sleeve body and a friction reducing layer; The friction-reducing layer is provided between the outer peripheral wall of the valve armature and the valve sleeve body, and at least a portion of the valve armature is guided in the friction-reducing layer.

3. The valve structure according to claim 2, characterized in that: The material of the friction reducing layer includes polytetrafluoroethylene.

4. The valve structure according to claim 2, characterized in that: The dimension of the friction reducing layer in the axial direction is not less than the dimension of the valve armature in the axial direction.

5. The valve structure according to any one of claims 1 to 4, characterized in that: The valve sleeve comprises a housing portion and a magnetic isolation portion connected to each other along the axial direction; The inner diameter of the magnetic isolation portion is smaller than the inner diameter of the housing portion, and at least a portion of the valve armature is guided in the magnetic isolation portion.

6. The valve structure according to claim 5, characterized in that: A portion of the second portion from the valve armature to the pilot valve is not guided by a component adjacent to a periphery of the second portion.

7. The valve structure according to any one of claims 1 to 4, characterized in that: The second portion, which extends from the valve armature to the pilot valve, is spaced apart from surrounding adjacent components; The dimension of the interval in the radial direction of the valve stem is not less than 0.2 mm.

8. The valve structure according to claim 7, characterized in that: It also includes a valve cover and an elastic structure sleeved outside the second part, wherein the valve cover is connected to the valve sleeve; The valve cover comprises a protruding portion protruding toward the axis of the valve stem, and the elastic structure is connected between the protruding portion and the valve armature along the axis direction; The second portion and the protrusion are adjacent to each other in a radial direction of the valve stem, and the second portion is not guided by the protrusion.

9. The valve structure according to claim 8, characterized in that: The orthographic projection of the protrusion on a reference plane perpendicular to the axial direction includes a ring shape.

10. The valve structure according to claim 8, characterized in that: It also includes a valve cover and a mounting member sleeved outside the second part, wherein the valve cover is connected to the valve sleeve; The mounting member is disposed between the second portion and the valve cover and is fixedly connected to the valve cover, and the elastic structure is connected between the mounting member and the valve armature along the axial direction; The second portion and the mounting member are adjacent to each other in a radial direction of the valve stem, and the second portion is not guided by the mounting member.

11. The valve structure according to claim 7, characterized in that: The first portion is exposed from an end of the valve armature away from the second portion, the first portion and the valve sleeve are adjacent to each other in a radial direction of the valve stem, and the first portion is not guided by the valve sleeve.

12. The valve structure according to claim 7, characterized in that: It also includes a shaft sleeve which is sleeved outside the valve stem and connected to the valve sleeve; The first portion is exposed from an end of the valve armature away from the second portion, and the shaft sleeve is arranged between the first portion and the valve sleeve; Wherein, the first portion is configured to be guided by the bushing.

13. A shock absorber, characterized in that: The invention comprises the valve structure as described in any one of claims 1 to 12.

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