Damping valve device of shock absorber

Abstract

The utility model belongs to the technical field of damping valves, and particularly discloses a damper damping valve device which comprises a piston rod and a damping control valve body, the damping control valve body is connected with the piston rod to form a middle cavity, and oil passing channels are formed in the piston rod and the damping control valve body. The oil passing channel is communicated with an outer cavity of the piston rod, the middle cavity and an inner cavity of the damping control valve body; and a solenoid is arranged in the piston rod and is in sealing fit with the piston rod, so that an oil passing path between the inner cavity of the rod part of the piston rod and the middle cavity is isolated. According to the utility model, the structure can be effectively simplified, so that the economical efficiency and the reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of damping valve, concretely relates to a shock absorber damping valve device. BACKGROUND

[0002] The shock absorber, namely the damping valve, is used for attenuating the vibration of the accelerating frame and the vehicle body to improve the smoothness of the vehicle. The shock absorber is mainly used for restraining the vibration of the spring when the spring bounces after absorbing the vibration and the impact from the road. When passing through the uneven road, the spring can filter the vibration of the road, but the spring itself will have reciprocating motion, and the shock absorber is used for restraining the spring from jumping. The shock absorber is used for absorbing and dissipating the impact and the bouncing motion of the suspension system of the vehicle and keeping the tire of the vehicle in contact with the ground. The shock absorber is installed to the frame through the upper mounting piece and installed to the suspension through the lower mounting piece of the ring or the bracket.

[0003] In the existing damping valve device, the damping control valve is installed in the working cylinder and connected with the piston rod. The working cylinder is filled with hydraulic oil. The damping control valve divides the working cylinder into two chambers, one near the piston rod and the other away from the piston rod. The damping control valve can adjust the oil passing difficulty of the two chambers. If gas is generated in the working cylinder, the gas is lighter than the oil under the action of gravity due to the vertical installation of the damping control valve and the piston rod. The gas will accumulate above the damping control valve, which will cause a series of problems and affect the normal work of the shock absorber. Therefore, in order to avoid the accumulation of gas in the damping control valve, a venting and oil passing opening is formed at the top end of the damping control valve.

[0004] In the adjustable damping valve device for vibration damper disclosed in the prior art with the publication number CN109073026A, a connecting channel is formed in the top of the damping control valve and communicated with the rear space. In order to make the connecting channel communicated with the working chamber near the piston rod, an exhaust opening is formed in the grounding main body. A screw valve is also introduced. In order to avoid the leakage of oil from the piston rod, a sealing element is introduced between the top end of the grounding main body and the bottom of the valve shell and between the bottom of the grounding main body and the polarity element. A pin is also designed between the grounding main body and the polarity element. In the prior art, many elements need to be introduced, which makes the structure of the grounding main body very complex. The grounding main body needs to be provided with grooves, pin holes and exhaust openings for installing the sealing elements.

[0005] The adjustable damping valve device for vibration damper disclosed in the prior art with the publication number CN109073026A increases the production cost and has poor processability. In addition, after introducing multiple elements, the stability and reliability of the damping valve device as a whole are poor. When one of the elements has a problem, the stability and reliability of the other elements are easily affected. SUMMARY

[0006] The utility model provides a kind of damper damping valve device, it aims at simplifying structure, to improve economy and reliability.

[0007] The utility model realizes by the following technical scheme: a kind of damper damping valve device, including piston rod, solenoid and damping control valve body, the damping control valve body is connected with the piston rod and forms intermediate cavity;

[0008] Oil passage is opened on the piston rod and the damping control valve body, and the oil passage is connected with the piston rod outside cavity, the intermediate cavity and the damping control valve body inner cavity;

[0009] Solenoid is arranged in the piston rod, and the solenoid is sealed with the piston rod, so as to isolate the oil passage between piston rod inner cavity and the intermediate cavity.

[0010] Compared with prior art, the utility model has the following advantages and beneficial effects:

[0011] In the scheme, the solenoid is sealed with the piston rod, can play the role of sealing, avoid oil leakage from the piston rod, so as to ensure the effectiveness of the damping valve device of the scheme, the sealing structure is simpler, and the processing and manufacturing are also simpler.

[0012] And oil passage is opened on the piston rod and the damping valve body, and the oil passage is connected with the piston rod outside space, the intermediate cavity and the damping control valve body inner cavity, can ensure that the damping control valve smoothly adjusts the oil passage degree between the two cavities close to the piston rod and away from the piston rod, and it is convenient to exhaust, avoid gas accumulation.

[0013] In the scheme, multiple elements need not be introduced as in prior art, effectively simplify the structure, to improve economy and reliability.

[0014] Further, the sealing element is arranged between the piston rod and the solenoid.

[0015] Further, the sealing element is a single sealing element or a sealing assembly.

[0016] Further, the solenoid outside and / or the piston rod inside is provided with a groove, and the sealing element is located in the groove.

[0017] Further, a sealing member is connected to the inner side wall of the piston rod or the outer side wall of the solenoid. The present scheme provides another mounting form of the sealing member, and the sealing member is connected to the piston rod or the solenoid as a whole, and then is mounted and assembled, so that the mounting is simpler.

[0018] Further, the cavity outside the piston rod is cavity B; the oil passage formed on the piston rod is a first oil passage, the first oil passage communicates with the intermediate cavity and the cavity B; the oil passage formed on the damping control valve body is a second oil passage, the second oil passage communicates with the inner cavity of the damping control valve body and the intermediate cavity.

[0019] In the present scheme, the second oil passage is arranged on the damping control valve body, and the first oil passage is arranged on the piston rod, the space outside the piston rod, the intermediate cavity and the inner cavity of the damping control valve body are communicated through the first oil passage and the second oil passage, so that the gas introduced into the electromagnetic valve during the operation of the shock absorber can be discharged, due to the density difference between the gas and the oil, the gas gathers to the side of the inner cavity of the damping control valve body, the intermediate cavity and the inner cavity of the damping control valve body are communicated, so that the problem of damping force fluctuation caused by bubble is effectively solved.

[0020] In addition, the cavity B and the intermediate cavity are communicated, so that the heat generated during the operation can be effectively taken away, and the reliability of the product is improved.

[0021] Further, the piston rod comprises a rod part and a containing part connected to each other, the diameter of the rod part is smaller than the diameter of the containing part, the oil passage is formed on the end of the containing part of the piston rod; the shape of the solenoid matches the structure formed by the rod part and the containing part of the piston rod.

[0022] In the present scheme, the piston rod comprises a rod part and a containing part, the oil passage is formed on the end of the containing part, so that the processing is simpler, and the oil passage is simpler. The shape of the solenoid matches the structure formed by the rod part and the containing part of the piston rod, so that the installation precision of the solenoid and the piston rod is improved.

[0023] Further, the solenoid comprises an upper tube body, a cross beam and a lower tube body, the upper tube body is located on the rod part of the piston rod, the lower tube body is located on the containing part of the piston rod, and the cross beam communicates with the upper tube body and the lower tube body.

[0024] In the present scheme, the upper tube body and the lower tube body of the solenoid can adapt to the rod part and the containing part of the piston rod respectively, and the cross beam of the solenoid can communicate the upper tube body and the lower tube body, so as to form a whole solenoid. In the present scheme, after the cross beam communicates the upper tube body and the lower tube body, the wire in the solenoid can be led out from the middle part of the piston rod.

[0025] Further, the upper tube body, the cross beam and the lower tube body of the solenoid are integrally formed.

[0026] In the scheme, the upper tube body, the cross beam and the lower tube body of the solenoid are integrally formed, and the structure is more stable and reliable.

[0027] Further, the upper tube body, the cross beam and the lower tube body of the solenoid are detachably connected or fixedly connected.

[0028] In the scheme, the upper tube body, the cross beam and the lower tube body of the solenoid are integrally formed, and the structure is more stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:

[0030] Figure 1 is a structural schematic view of an embodiment of a damper damping valve device of the present application;

[0031] Figure 2 is a structural schematic view of an embodiment of a damper damping valve device of the present application;

[0032] Markings in the drawings and corresponding names of parts:

[0033] Piston rod 1, rod portion 101, accommodating portion 102, solenoid 2, upper tube body 201, cross beam 202, lower tube body 203, damping control valve body 3, sealing element 4, first oil passage 5, second oil passage 6, working cylinder 7, piston 8, cavity A, cavity B, cavity C, cavity D, cavity E. DETAILED DESCRIPTION

[0034] To make the purpose, technical scheme and advantages of the present application clearer and more apparent, the present application will be further described in detail below with reference to the embodiments and drawings, and the schematic embodiments of the present application and the description thereof are only used to explain the present application, and do not limit the present application.

[0035] As shown in Figure 1 The present embodiment provides a damper damping valve device, which comprises a piston rod 1 and a damping control valve body 3, the damping control valve body 3 is connected with the piston rod 1 in cooperation, the piston rod 1 is internally provided with a solenoid 2, and the solenoid 2 is internally provided with a coil. The structure and principle of the damping control valve body 3 are the same as those in the prior art, for example, the structure and principle of the adjustable damping valve device for a vibration damper disclosed in the prior art with the publication number CN109073026A, and details are not repeated here.

[0036] The damping control valve body 3 is connected with the piston rod 1 and forms an intermediate cavity therebetween, the piston rod 1 and the damping control valve body 3 are both provided with an oil passage, the oil passage connects the outer cavity of the piston rod 1, the intermediate cavity and the inner cavity of the damping control valve body, the piston rod 1 is in sealing fit with the solenoid 2, so as to isolate the oil passage between the rod inner cavity of the piston rod 1 and the intermediate cavity.

[0037] In the embodiment, the sealing member 4 is arranged between the piston rod 1 and the solenoid 2, the sealing member 4 is a single sealing member or a sealing assembly, that is, the sealing member 4 can be a single sealing ring structure, or can be a sealing member assembly structure formed by a sealing ring and other components, which can be flexibly selected according to actual needs.

[0038] In the embodiment, a groove is arranged on the outer side of the solenoid 2 and / or the inner side of the piston rod 1, and the sealing member 4 is arranged in the groove, the groove facilitates the installation and positioning of the sealing member 4. In another embodiment, the sealing member 4 is connected to the inner wall of the piston rod 1 or the outer wall of the solenoid 2, in which the sealing member 4 is integrated with the inner wall of the piston rod 1 or the outer wall of the solenoid 2, the sealing member 4 is a flexible structure and can be deformed, so as to facilitate the tight sealing, that is, the sealing member 4 is a flexible protruding structure formed on the piston rod 1 or the solenoid 2.

[0039] Returning to the embodiment, the piston rod 1 includes a rod part 101 and a receiving part 102 connected with each other, the rod part 101 and the receiving part 102 are integrally formed to form the whole piston rod 1, the diameter of the rod part 101 is smaller than that of the receiving part 102, so that the rod part 101 and the receiving part 102 form a stepped structure, and the oil passage on the piston rod 1 is arranged on the end of the receiving part 102 of the piston rod 1; the shape of the solenoid 2 matches the structure formed by the rod part 101 and the receiving part 102 of the piston rod 1, specifically, the solenoid 2 includes an upper tube body 201, a cross beam 202 and a lower tube body 203, the upper tube body 201 is located on the rod part 101 of the piston rod 1, the lower tube body 203 is located on the receiving part 102 of the piston rod 1, the cross beam 202 communicates with the upper tube body 201 and the lower tube body 203, and the upper tube body 201 and the lower tube body 203 are connected into a whole through the cross beam 202.

[0040] The solenoid 2 is a plastic tube, and in one embodiment, the upper tube body 201, the cross beam 202 and the lower tube body 203 of the solenoid 2 are integrally formed; in another embodiment, the upper tube body 201, the cross beam 202 and the lower tube body 203 of the solenoid 2 are detachably connected (such as snap-fit) or fixedly connected (such as through adhesion, fastener connection, etc.), that is, the upper tube body 201, the cross beam 202 and the lower tube body 203 of the solenoid 2 are a split structure, and the upper tube body 201, the cross beam 202 and the lower tube body 203 are three independent parts, which can be manufactured and processed respectively, and then connected when assembled. When installing, the upper tube body 201 and the lower tube body 203 can be adhesively fixed or detachably connected through clamping according to actual installation conditions and needs through the cross beam 202.

[0041] Returning to the present embodiment, the sealing member 4 is located between the upper tube body 201 of the solenoid 2 and the rod portion 101 of the piston rod 1, and plays a sealing and blocking role on the rod portion 101 of the piston rod 1, so as to avoid oil leakage from the rod portion 101 of the piston rod 1.

[0042] As shown in Figure 2 , the damper damping valve device of the present embodiment needs to be installed in the working cylinder 7 for cooperation, and the end of the damping control valve body 3 away from the piston rod 1 is connected with the piston. In combination with Figure 1 and Figure 2 , the end of the damping control valve body 3 and the piston 8 have a cavity A, the cavity outside the piston rod 1 and the damping control valve body 3 is a cavity B (that is, the space between the damper damping valve device of the present embodiment and the working cylinder 7 is a cavity B), the space between the solenoid and the piston rod 1 has a cavity C, the intermediate cavity formed between the damping control valve body 3 and the containing portion 102 of the piston rod 1 is a cavity D, and the inner cavity of the damping control valve body 3 is a cavity E.

[0043] The oil passage formed on the piston rod 1 is a first oil passage 5, and the first oil passage 5 is located at the end of the containing portion 102 of the piston rod 1 in the present embodiment, and the first oil passage 5 communicates with the cavity D and the cavity B; the oil passage formed on the damping control valve body 3 is a second oil passage 6, and the second oil passage 6 communicates with the cavity E and the cavity D.

[0044] The damping control valve body 3 can adjust the oil passing difficulty of the cavity A and the cavity B, so as to adjust the damping force level of the shock absorber; the upper pipe body 201 of the solenoid 2 and the rod part 101 of the piston rod 1 are directly or indirectly provided with the sealing element 4, so as to isolate the oil passing path of the piston rod rod part inner cavity and the intermediate cavity, that is, the cavity D and the cavity C; since the solenoid 2 wire is led out from the middle part of the piston rod 1, the cross beam 202 is easy to cause the sealing structure to be complicated, as mentioned in the background art, the publication number CN109073026A for the adjustable damping valve device of the vibration damper, and since the sealing path can be effectively simplified by the sealing structure and the oil passing channel of the present embodiment, the product structure is simplified, and the product cost is effectively reduced.

[0045] The damping control valve body 3 is provided with the second oil passing channel 6, the piston rod 1 is provided with the first oil passing channel 5, the cavity B, the cavity D and the cavity E are communicated through the first oil passing channel 5 and the second oil passing channel 6, the gas introduced into the electromagnetic valve during the operation of the shock absorber can be discharged, since the density difference between the gas and the oil, the gas gathers to the cavity E side, the cavity D and the cavity E are communicated, and the damping force fluctuation problem caused by the bubble is effectively solved. And the cavity B and the cavity D are communicated, which can effectively take away the heat generated during the working process and improve the product reliability.

[0046] It should be noted that the above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein.

[0047] In the description of the present application, it should be noted that the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to illustrate the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts.

[0049] In the description of the present document, some terms can be used to represent the positional or positional relationship in addition to the meaning of the terms. For example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0050] In the description of the present document, the terms "mounting", "setting", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] The structure, proportion, size, etc. drawn in the drawings attached in the present application are only used to cooperate with the content disclosed in the present technical disclosure, so that those skilled in the art can understand and read, and do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0052] The terms used in the present document are those general terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms can vary according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as mere names, but based on the meaning of the terms and the overall description of the present disclosure.

[0053] Flowcharts or words are used in the present document to illustrate the operation steps performed according to the embodiments of the present application. It should be understood that the operation steps in the embodiments of the present application are not necessarily executed in the order recorded. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can be added to these processes, or one or more steps of operation can be removed from these processes.

[0054] The above is only the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A damping valve device for a shock absorber, comprising a piston rod and a damping control valve body, wherein the damping control valve body is connected to the piston rod to form an intermediate cavity, characterized in that, Both the piston rod and the damping control valve body have oil passages, which connect the outer cavity of the piston rod, the intermediate cavity, and the inner cavity of the damping control valve body. The piston rod is equipped with a solenoid, which is sealed to the piston rod to isolate the oil passage between the inner cavity of the piston rod and the intermediate cavity.

2. The damping valve device for a shock absorber according to claim 1, characterized in that, A seal is provided between the piston rod and the solenoid.

3. The damping valve device for a shock absorber according to claim 2, characterized in that, The seal is a single seal or a sealing assembly.

4. A damper damping valve device according to claim 2 or 3, characterized in that, A groove is provided on the outer side of the solenoid and / or the inner side of the piston rod, and the seal is located in the groove.

5. The damping valve device for a shock absorber according to claim 1, characterized in that, A seal is connected to the inner wall of the piston rod or the outer wall of the solenoid.

6. The damping valve device for a shock absorber according to claim 1, characterized in that, The cavity outside the piston rod is cavity B; The oil passage on the piston rod is the first oil passage, which communicates with the intermediate cavity and cavity B; the oil passage on the damping control valve body is the second oil passage, which communicates with the inner cavity of the damping control valve body and the intermediate cavity.

7. The damping valve device for a shock absorber according to claim 1, characterized in that, The piston rod includes a rod portion and a receiving portion connected to each other. The diameter of the rod portion is smaller than the diameter of the receiving portion. An oil passage on the piston rod is formed at the end of the receiving portion of the piston rod. The shape of the solenoid matches the structure formed by the rod portion and the receiving portion of the piston rod.

8. A damper damping valve device according to claim 7, characterized in that, The solenoid includes an upper tube body, a crossbeam, and a lower tube body. The upper tube body is located at the rod portion of the piston rod, and the lower tube body is located at the receiving portion of the piston rod. The crossbeam communicates with the upper tube body and the lower tube body.

9. A damper damping valve device according to claim 8, characterized in that: The upper tube body, crossbeam, and lower tube body of the solenoid are integrally formed.

10. A damper damping valve device according to claim 8, characterized in that: The upper tube body, crossbeam, and lower tube body of the solenoid can be detachably or fixedly connected.

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