Rigidity valve and valve element thereof

Abstract

The utility model provides a stiffness valve and a valve element thereof. The rigidity valve comprises a dynamic sealing structure, fixed iron and a valve element. The valve element is sleeved with fixed iron, a dynamic sealing structure is arranged between the fixed iron and the valve element, the dynamic sealing structure at least comprises lateral sealing rubber, and the lateral sealing rubber is matched with the valve element to form a dynamic sealing pair; the valve element comprises a metal body, and the metal body comprises a main body part and a rubber mounting part; the rubber mounting part is arranged at one end of the main body part along the axial direction and is used for mounting valve port sealing rubber; the main body part has a fixed outer diameter; and a target coating capable of reducing friction force is arranged on the peripheral surface of the main body part. According to the utility model, the processing difficulty of the valve core can be reduced, the processing cost of the valve core is reduced, the abrasion loss of the lateral sealing rubber is reduced, and the sealing performance is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air spring technical field, especially relate to a stiffness valve and its valve core. BACKGROUND

[0002] With the development of the automobile industry, the consumer market for automobile positioning is changing. End consumers no longer only regard the automobile as a means of transport, and the automobile has become a carrier and space for improving the quality of life. This consumption trend means that while the industry is pursuing automobile intelligence, it also needs to further improve the comfort and driving quality of the automobile. Vehicles with air springs have good ride smoothness and ride stability when driving on winding roads due to the stiffness characteristics and vibration frequency of air springs, can effectively ensure the excellent adhesion of tires to the road, and can effectively reduce the road damage ability of the vehicle, thereby improving the steering stability and driving safety of the vehicle when driving at high speed. The stiffness valve as an important component of the air spring system enables the air suspension system to achieve the following benefits: variable volume additional air chamber, switchable characteristic curve, and set motion or comfort mode switching. The demand for stiffness valves is also increasing.

[0003] The stiffness valve commonly used in the current automobile industry is a normally open electromagnetic valve. When the stiffness valve is not powered, the valve port is in an open state to realize air flow between the two valve cavities. When the stiffness valve is powered, the valve core moves downward under the action of electromagnetic force until it contacts the valve seat, closes the valve port, and the flow channel between the two valve cavities is cut off, and the valve port is in a sealed state. At this time, the valve core and the fixed iron are further cut off the flow channel between the two valve cavities through the dynamic sealing structure. In the existing related technology, the dynamic sealing structure is usually composed of a rubber sealing element and a plastic support element, which is positioned and installed as an independent component between the valve core and the fixed iron, and needs to rely on the valve seat and the fixed iron to limit the dynamic sealing component. This dynamic sealing component forms a dynamic sealing pair with the valve core through the rubber sealing element. Due to the movement of the valve core, friction exists between the valve core and the rubber sealing element, which causes abnormal wear of the rubber sealing element. To avoid the above situation, the existing valve core is usually designed with variable diameter. When the valve port is open, there is no sealing requirement, the rubber sealing element cooperates with the small diameter section of the valve core, and when the valve port is closed, the rubber sealing element cooperates with the large diameter section of the valve core to ensure the sealing performance. However, the sealing pair cooperation between the valve core and the rubber sealing element requires high, and the processing difficulty of the valve core is relatively large, and the processing cost is high.

[0004] It should be noted that the information disclosed in the background section of this application is only intended to deepen the understanding of the general background of the application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a purpose at providing a kind of rigidity valve and its valve core, to solve the machining difficulty big, processing cost high of existing valve core, and the problem that existing dynamic sealing rubber is easily worn in working process.

[0006] To achieve the above object, the utility model provides a valve core of rigidity valve, the valve core includes metal body, the metal body includes main part and rubber mounting part;The rubber mounting part is arranged in the main part along axial one end, and is used to install valve port sealing rubber;The main part has fixed and unchangeable outer diameter;And target coating capable of reducing friction is arranged on the outer circumferential surface of the main part.

[0007] Optionally, the thickness of the target coating is 20um-50um.

[0008] Optionally, the thickness of the target coating is 20um or 30um.

[0009] Optionally, the target coating is made of polytetrafluoroethylene.

[0010] Optionally, the valve core further includes the valve port sealing rubber, and the valve port sealing rubber is integrated with the metal body by rubber vulcanization forming.

[0011] To achieve the above object, the utility model further provides a rigidity valve, including dynamic sealing structure, fixed iron and the valve core of rigidity valve of any one described;The valve core is equipped with the fixed iron, and the dynamic sealing structure is equipped between the fixed iron and the valve core, and the dynamic sealing structure at least includes lateral sealing rubber, and the lateral sealing rubber cooperates with the main part of the valve core to form dynamic sealing pair.

[0012] Optionally, the dynamic sealing structure is composed of the lateral sealing rubber, and the lateral sealing rubber is integrally vulcanized and formed on the fixed iron.

[0013] Optionally, the dynamic sealing structure further includes support structure, and the lateral sealing rubber is installed on the support structure, and the support structure is connected with the fixed iron by interference fit.

[0014] Optionally, the lateral sealing rubber is integrally vulcanized and formed on the support structure.

[0015] Optionally, wear-reducing coating is arranged on the lateral sealing rubber.

[0016] Compared with prior art, the technical scheme provided by the utility model has at least the following beneficial effects:

[0017] The valve core provided by the utility model reduces the assembly requirement of dynamic sealing pair between dynamic sealing structure and valve core due to the equal-diameter design of the main part of metal body, thereby reducing the machining difficulty and processing cost of valve core.

[0018] The valve core provided by the utility model further sets the target coating capable of reducing friction force on the outer circumferential surface of the main body part of the metal body, so that the surface of the metal structure matched with the dynamic seal on the valve core has good lubricating property, thereby making the valve core not easy to wear the rubber even if equal diameter is adopted, reducing the wear amount of the lateral sealing rubber, and guaranteeing the sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings are used for better understanding of the utility model and do not constitute improper limitation on the utility model. Among them:

[0020] Figure 1 It is the structure schematic view of the rigidity valve in the preferred embodiment of the utility model;

[0021] Figure 2 It is the sectional structure schematic view of the valve core in the preferred embodiment of the utility model;

[0022] Figure 3 It is the whole structure schematic view of the valve core in the preferred embodiment of the utility model;

[0023] Figure 4 It is Figure 1 The partial enlarged view about detail B in the preferred embodiment of the utility model.

[0024] Among them, the sign explanation is as follows:

[0025] 11-electromagnetic module, 12-sleeve, 13-armature, 14-connecting rod, 15-spring, 16-fixed iron, 17-valve core, 18-valve seat, 19-housing, 20-dynamic sealing structure, 201-lateral sealing rubber, 2011-sealing lip, 202-supporting structure, 170-metal body, 171-main body part, 172-rubber mounting part, 173-target coating, 174-limiting rubber, 21, 22, 23-sealing ring, 24-valve port sealing rubber, 101, 102-two valve cavities. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and functions of the present application from the content disclosed in the specification. The present application can be implemented or applied in other different embodiments, and the details in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the present embodiment only schematically illustrate the basic concept of the present application, and thus the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation. The shape, number and proportion of the components in actual implementation can be randomly changed, and the component layout pattern can be more complex.

[0027] In addition, each embodiment of the following description has one or more technical features, but this does not mean that the user of the present application must simultaneously implement all the technical features in any embodiment, or can only separately implement one or all technical features in different embodiments. In other words, under the premise of implementation, those skilled in the art can selectively implement part or all of the technical features in any embodiment, or selectively implement a combination of part or all of the technical features in multiple embodiments, thereby increasing the flexibility of the implementation of the present application, based on the disclosure of the present application and according to design specifications or implementation needs.

[0028] As used in this specification, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense of "and / or" unless the content clearly dictates otherwise, and the term "have," and "having," or "include," and "including" are used interchangeably in this specification. The term "mount," "connected," "connecting," should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. The relationship terms such as "first", "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations, nor indicate or imply relative importance or implicitly indicate the number of technical features indicated. It should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application. The device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, "outer peripheral surface" refers to an outer surface arranged circumferentially around the center axis of the valve core, "axial direction" refers to the direction along the center axis, "circumferential direction" refers to the direction around the center axis, and "radial direction" refers to the direction perpendicular to the center axis.

[0030] The present application aims to provide a stiffness valve and a valve core thereof, so as to solve the problems of high machining difficulty and high machining cost of the existing valve core, and easy wear of the existing dynamic seal during operation.

[0031] The stiffness valve of the present application comprises a dynamic sealing structure, a valve core and a fixed iron; the valve core is sleeved with the fixed iron, the dynamic sealing structure is arranged between the fixed iron and the valve core, and the dynamic sealing structure at least comprises a lateral sealing rubber, and the lateral sealing rubber cooperates with the main body part of the valve core to form a dynamic sealing pair. It should be noted that for other structures in the stiffness valve, those skilled in the art can understand them according to the prior art.

[0032] Figure 1As shown in a structural schematic view of the rigidity valve in an exemplary embodiment of the present utility model. Figure 1 As shown, the rigidity valve comprises electromagnetic module 11, sleeve 12, armature 13, connecting rod 14, spring 15, fixed iron 16, valve core 17, valve seat 18, shell 19 and dynamic sealing structure 20 and other components. Generally, the rigidity valve further comprises several sealing rings 21, 22 and 23. As shown, the top end outside of shell 19 is provided with sealing ring 21, the bottom end outside of valve seat 18 is provided with sealing ring 22, and in addition, sealing ring 23 is further provided between fixed iron 16 and shell 19. Of course, the number and position of the sealing ring should be adjusted according to the actual situation, and is not limited to the view shown in the drawing.

[0033] From Figure 1 It can be known that electromagnetic module 11 is at least partially arranged in shell 19 and fixed with shell 19, and sleeve 12 is sleeved in electromagnetic module 11, armature 13 and fixed iron 16 are sleeved in sleeve 12, and fixed iron 16 is below armature 13. One end of fixed iron 16 is connected with sleeve 12, and the other end of fixed iron 16 is fixedly sleeved with shell 19. Non-limitingly, fixed iron 16 and sleeve 12 are first connected in interference, and then welded. In addition, valve core 17 is sleeved in fixed iron 16, valve seat 18 is arranged at the bottom of valve core 17, and valve seat 18 is fixed with fixed iron 16 and shell 19 respectively. In addition, fixed iron 16, valve core 17, spring 15 and armature 13 are all sleeved on connecting rod 14. One end of connecting rod 14 is fixed with armature 13, and the other end of connecting rod 14 is fixed with valve core 17. Non-limitingly, armature 13 and connecting rod 14 are connected in interference, and valve core 17 and connecting rod 14 are connected in interference. One end of spring 15 is limited on fixed iron 16, and the other end of spring 15 is limited on armature 13. When electromagnetic module 11 is powered off, spring 15 releases elastic potential energy, thereby pushing armature 13 to drive valve core 17 to reset. The inner hole of valve core 17 is commonly provided with two through holes at the connection with connecting rod 14, for communicating the cavities on the upper and lower sides of valve core 17.

[0034] Specifically, the working principle of the above rigidity valve is that when electromagnetic module 11 is powered on, armature 13 moves downward under the action of electromagnetic force, and drives connecting rod 14 and valve core 17 to move downward until valve core 17 contacts valve seat 18, thereby closing the valve port, and the position where valve core 17 contacts valve seat 18 is provided with valve port sealing rubber 24, valve port sealing rubber 24 forms a sealing pair with valve seat 18, and the outer periphery of valve core 17 cooperates with dynamic sealing structure 20 to form a dynamic sealing pair, so that the passages of two valve cavities 101 and 102 are cut off, to ensure the sealing performance; when electromagnetic module 11 is powered off, armature 13 moves upward under the action of spring 15, synchronously drives connecting rod 14 and valve core 17 to move upward, opens the valve port, and makes the passages between two valve cavities 101 and 102 be communicated.

[0035] Therefore, the opening and closing of the valve port need to be realized by the reciprocating movement of the valve core 17, so that there is friction between the valve core 17 and the dynamic sealing structure 20, which is easy to cause wear of the dynamic sealing structure 20. If the valve core 17 is a variable diameter structure, although the wear of the rubber can be reduced, the processing difficulty and processing cost of the valve core 17 will be greatly increased. Therefore, the valve core 17 of the embodiment is improved, which will be described in detail Figure 2 and Figure 3 .

[0036] As shown in Figure 2 and Figure 3 , the valve core 17 comprises a metal body 170, the metal body 170 comprises a main body part 171 and a rubber mounting part 172; the rubber mounting part 172 is arranged at one end (i.e. the bottom end) of the main body part 171 along the axial direction, for mounting the valve port sealing rubber 24; the main body part 171 has a fixed outer diameter D2. Wherein, the outer diameter D1 of the rubber mounting part 172 is greater than, equal to or less than the outer diameter D2 of the main body part 171. Generally, the outer diameter D1 of the rubber mounting part 172 is greater than the outer diameter D2 of the main body part 171. In the embodiment, the metal body 170 is integrally processed and formed.

[0037] The valve port sealing rubber 24 can be fixed on the rubber mounting part 172 by various measures. Preferably, the valve port sealing rubber 24 and the metal body 170 are integrally formed by rubber vulcanization, that is, the valve port sealing rubber 24 is integrally vulcanized on the rubber mounting part 172 of the metal body 170. Preferably, recessed or convex structures are formed on the rubber mounting part 172 to increase the contact area of the valve port sealing rubber 24 and the rubber mounting part 172 and ensure the bonding force of the two.

[0038] The main body part 171 cooperates with the dynamic sealing structure 20 to form a dynamic sealing pair. Since the main body part 171 has a fixed outer diameter, the sealing pair cooperation requirement between the valve core 17 and the dynamic sealing structure 20 is reduced, and the processing difficulty and processing cost of the valve core 17 are reduced.

[0039] At the same time, as shown in Figure 3 , a target coating 173 capable of reducing friction is arranged on the outer peripheral surface of the main body part 171. The target coating 173 can adopt any suitable coating material with low friction coefficient and high wear resistance. Therefore, on the basis of equal diameter, the lubrication performance of the cooperation surface of the valve core 17 and the dynamic sealing structure 20 is further increased by the target coating 173, so as to reduce the wear of the rubber and ensure the sealing performance.

[0040] The application is not limited to the coating method of the target coating layer 173, for example, various common coating methods such as spraying, dipping, brushing, and deposition. Since spraying has the characteristics of good effect, high efficiency, not easy to fall off, and high raw material utilization rate, the target coating layer 173 is more preferably sprayed on the main body part 171. Before spraying, the metal body 170 is cleaned to remove surface oil, dust and impurities, ensure the dryness and non-pollution of the substrate, thereby increasing the adhesion of the target coating layer 173.

[0041] The application does not have special requirements for the material for preparing the target coating layer 173, and any one or more high molecular materials with good lubricity and wear resistance can be used to prepare the target coating layer 173. For example, polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA), polyethylene (PE), etc. Of course, the actual application is not limited to this. More suitably, the target coating layer 173 is made of polytetrafluoroethylene, which has better effect.

[0042] The thickness of the target coating layer 173 should be appropriate. Preferably, the thickness of the target coating layer 173 is 20um-50um, for example, 20um, 30um, 40um or 50um; this thickness has good anti-sticking property, surface smoothness and wear resistance. More preferably, the thickness of the target coating layer 173 is 20um or 30um, which has good surface smoothness of the part, is beneficial to reduce the wear of the rubber part, and has low cost.

[0043] In another aspect, as shown in Figure 4 The dynamic sealing structure 20 at least includes a lateral sealing rubber 201, which cooperates with the main body part 171 of the spool 17 to form a dynamic sealing pair.

[0044] As shown in Figure 4 In some embodiments, the dynamic sealing structure 20 further includes a support structure 202; the lateral sealing rubber 201 is mounted on the support structure 202. And the support structure 202 is made of metal material or plastic.

[0045] In one way, the dynamic sealing structure 20 is limited by the valve seat 18 and the fixed iron 16, that is, the valve seat 18 and the fixed iron 16 cooperatively clamp the dynamic sealing structure 20, at this time, the support structure 202 is a plastic part.

[0046] In another way, the support structure 202 is a metal piece, and the support structure 202 is connected with the fixed iron 16 in interference fit. In this way, the dynamic sealing structure 20 is connected with the fixed iron 16 as a whole, forming an independent assembly, and avoiding relying on the valve seat 18 and the fixed iron 16 to limit the dynamic sealing structure 20 in the axial direction, thereby reducing the assembly requirements of the dynamic sealing, simplifying the structure, and reducing the assembly difficulty and processing cost. Further, the lateral sealing rubber 201 and the support structure 202 are integrally formed by rubber vulcanization, that is, the lateral sealing rubber 201 is integrally vulcanized on the support structure 202.

[0047] In other cases, the support structure 202 can be removed, and only the lateral sealing rubber 201 is retained, and the lateral sealing rubber 201 is integrally vulcanized on the fixed iron 16, so that the fixed iron 16 is provided with the lateral sealing rubber 201, and the dynamic sealing structure 20 does not need to be limited by the valve seat 18 and the fixed iron 16 in the axial direction, thereby simplifying the dynamic sealing structure and reducing the assembly difficulty and processing cost of the dynamic sealing.

[0048] In order to further reduce the wear of the lateral sealing rubber 201 during operation, a wear-reducing coating can be provided on the lateral sealing rubber 201 to reduce the friction when cooperating with the valve core 17. In practice, molybdenum disulfide or other wear-reducing coating materials with similar functions can be used. For this purpose, the present application is not limited.

[0049] Continuing to refer to Figure 4 The lateral sealing rubber 201 is usually provided with two sealing lips 2011, which are arranged above and below, and the bending directions of the two sealing lips 2011 are different, so that each can seal the pressure from the corresponding direction.

[0050] In this way, when the electromagnetic module 11 is powered on, the bottom of the valve core 17 contacts the valve seat 18 to form a static sealing pair, at this time, the two sealing lips 2011 of the lateral sealing rubber 201 cooperate with the main body 171 of the valve core 17 to form a dynamic sealing pair, so that the channel between the two valve cavities 101 and 102 of the stiffness valve is cut off, and air cannot flow between the two valve cavities 101 and 102; when the electromagnetic module 11 is powered off, the valve core 17 returns to separate from the valve seat 18, opening the valve port, so that the channel between the two valve cavities 101 and 102 of the stiffness valve is connected, and air normally flows between the two valve cavities 101 and 102, at this time, the two sealing lips 2011 of the lateral sealing rubber 201 cooperate with the main body 171 of the valve core 17, but the lateral sealing rubber 201 is still deformed.

[0051] Further preferably, the lateral sealing rubber 201 is arranged on the fixed iron 16 in the axial direction of the fixed iron 16, and the lateral sealing rubber 201 is arranged on the fixed iron 16 in the axial direction of the fixed iron 16. Figure 4The position setting protrusion is arranged around the periphery, and the protrusion is in interference fit with the fixed iron 16, further sealing the leakage passage between the fixed iron 16 and the dynamic sealing structure 20, and ensuring the reliability of the sealing.

[0052] Referring back to Figure 3 , the valve core 17 is further provided with a limiting rubber 174 at the end (i.e. the top end) away from the rubber mounting portion 172, which is located between the metal body 170 and the fixed iron 16, and can prevent collision.

[0053] Finally, based on the same inventive concept, the embodiment also provides an air spring, which is internally provided with the rigidity valve provided by any of the embodiments of the application, and the opening and closing of the rigidity valve controls the change of the internal volume of the air spring, that is, the communication and closing of the additional air chamber and the air spring body cavity, so as to adjust the rigidity of the air spring, so as to meet the demand of the riding comfort and safety performance of the vehicle in the driving process.

[0054] Although the present application has been disclosed as above, it is not limited to this. Those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application belong to the scope of the present application and equivalent technology, the present application also intends to include these modifications and changes.

Claims

1. A spool for a stiffness valve, characterized by The valve core comprises a metal body, the metal body comprises a main body part and a rubber mounting part; the rubber mounting part is arranged at one end of the main body part in the axial direction and is used for mounting a valve port sealing rubber; the main body part has a fixed outer diameter; and a target coating capable of reducing friction is arranged on the outer circumferential surface of the main body part.

2. The spool of a stiffness valve according to claim 1, characterized in that The thickness of the target coating is 20um-50um.

3. The spool of a stiffness valve according to claim 2, characterized in that The thickness of the target coating is 20um or 30um.

4. The spool of a stiffness valve according to claim 1, wherein The target coating is made of polytetrafluoroethylene.

5. The spool of a stiffness valve according to claim 1, wherein The valve port sealing rubber is also included, and the valve port sealing rubber and the metal body are integrally formed by rubber vulcanization.

6. A stiffness valve characterized by, The valve core comprises a dynamic sealing structure, a fixed iron and a stiffness valve as claimed in any one of claims 1-5; the valve core is sleeved with the fixed iron, the dynamic sealing structure is arranged between the fixed iron and the valve core, and the dynamic sealing structure at least comprises a lateral sealing rubber, the lateral sealing rubber cooperates with the main body part of the valve core to form a dynamic sealing pair.

7. The stiffness valve of claim 6, wherein The dynamic sealing structure is composed of the lateral sealing rubber, and the lateral sealing rubber is integrally vulcanized and formed on the fixed iron.

8. The stiffness valve of claim 6, wherein The dynamic sealing structure further comprises a support structure, the lateral sealing rubber is mounted on the support structure, and the support structure is connected with the fixed iron in an interference fit.

9. The stiffness valve of claim 8, wherein, The lateral sealing rubber is integrally vulcanized and formed on the support structure.

10. The stiffness valve of claim 6, wherein A friction-reducing coating is arranged on the lateral sealing rubber.

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