Piston valve and vibration damper
By using non-circular anti-loose nuts with outer walls in the piston valve, the first countersunk hole with convex ribs is clamped in the inner wall, the problem of nut loosening is solved, and the stability and reliability of the damping performance of the shock absorber is achieved.
Patent Information
- Application Number
- CN202421382039.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-17
AI Technical Summary
In existing piston valves, the coordination between the circular nut and the through hole is prone to loosening, causing the nut to not respond to the oil pressure normally, affecting the damping performance of the vibration damper.
A non-round anti-loose nut with an outer wall is used to clamp in the first countersunk hole with a convex rib on the inner wall to achieve anti-rotation limit and avoid the nut being offset and loose.
Ensure that the anti-loosening nut always responds to oil pressure normally, compresses the spring and pushes the gaskets and conducts through holes, thereby ensuring the damping performance of the vibration damper is stable and reliable.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shock absorbers, in particular to a piston valve and a shock absorber. Background Art
[0002] The end of the piston rod of the shock absorber is equipped with a piston valve for realizing oil exchange between the upper working chamber and the lower working chamber of the shock absorber.
[0003] The valve body of the piston valve is provided with a through hole, in which a bolt is passed, a gasket is placed on the nut end of the bolt, a spring is placed on the screw end, and the nut is screwed; in a natural state, the gasket seals and covers the through hole. During the operation of the shock absorber, when the oil in the upper working chamber pushes the nut so that the nut compresses the spring and pushes the gasket through the bolt, the through hole is connected, and the oil can enter the lower working chamber from the upper working chamber; or, when the oil in the lower working chamber pushes the nut so that the nut compresses the spring and pushes the gasket through the bolt, the through hole is connected, and the oil can enter the upper working chamber from the lower working chamber.
[0004] The problem with the current piston valve is that the nut usually adopts a circular nut structure, and the fit between the nut and the through hole is prone to loosening, resulting in the nut being unable to respond normally to the pressure of the oil to compress the spring and push the gasket to open the through hole, thereby affecting the damping performance of the shock absorber.
[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0006] In view of this, the utility model provides a piston valve and a shock absorber, in which a non-circular anti-loosening nut on the outer wall is clamped in a first countersunk hole with a convex rib on the inner wall, thereby realizing anti-rotation limiting of the anti-loosening nut and avoiding the anti-loosening nut from deviating and loosening, so that the anti-loosening nut always responds normally to the pressure of the oil to compress the spring and push the gasket to open the through hole, thereby ensuring the stability and reliability of the damping performance of the shock absorber.
[0007] One aspect of the utility model provides a piston valve, including a valve body and a bolt assembly, the valve body is provided with a through hole with a first countersunk hole, the bolt assembly includes a bolt with a gap passing through the through hole, a gasket sleeved on the nut end of the bolt, and a spring sleeved on the screw end of the bolt and accommodated in the first countersunk hole, wherein: a plurality of ribs are formed on the inner wall of the first countersunk hole, the piston valve also includes a lock nut tightened on the screw end, the outer wall of the lock nut is formed into a non-circular shape, and the outer wall of the lock nut clamps the plurality of ribs; wherein the gasket can seal and cover the through hole, and the lock nut can compress the spring and push the gasket through the bolt.
[0008] In some embodiments, the first counterbore is formed by a plurality of circular counterbores, and the plurality of circular counterbores at least partially overlap to form the plurality of ribs.
[0009] In some embodiments, the outer wall of the anti-loosening nut is formed into an elliptical shape; or, the anti-loosening nut is a polygonal nut, and the outer wall of the polygonal nut is formed with multiple edges, at least some of which clamp the multiple ribs.
[0010] In some embodiments, the first countersunk hole is formed by three circular countersunk holes arranged side by side, wherein the circular countersunk hole in the middle is larger than the circular countersunk holes on both sides, the circular countersunk holes on both sides are spaced apart, and the circular countersunk hole in the middle overlaps with the circular countersunk holes on both sides to form four convex ribs; the anti-loosening nut is an octagonal nut, and the four non-adjacent edges of the octagonal nut respectively clamp the four convex ribs.
[0011] In some embodiments, the spring is accommodated in the circular countersunk hole located in the middle; the outer diameter of the spring matches the inner diameter of the circular countersunk hole located in the middle.
[0012] In some embodiments, the through hole has a second countersunk hole, and the second countersunk hole and the first countersunk hole are respectively located at the two end surfaces of the valve body; in the natural state of the spring, the gasket seals and covers the second countersunk hole.
[0013] In some embodiments, the through hole includes a plurality of holes, and the two end surfaces of the valve body are respectively formed with a plurality of the first countersunk holes.
[0014] In some embodiments, along the circumference of the valve body, a plurality of the through holes alternately form the first countersunk holes on both end surfaces of the valve body, and the first countersunk holes on each end surface of the valve body are evenly distributed.
[0015] In some embodiments, the piston valve further comprises: a locking nut, which is tightened on the end of the screw rod and presses the anti-loosening nut.
[0016] Another aspect of the utility model provides a shock absorber, wherein the piston rod end of the shock absorber is equipped with a piston valve as described in any of the above embodiments.
[0017] Compared with the prior art, the beneficial effects of the present invention include at least:
[0018] The piston valve of the utility model realizes anti-rotation limitation of the anti-loosening nut by clamping the non-circular anti-loosening nut on the outer wall in the first countersunk hole with convex ribs on the inner wall, thereby preventing the anti-loosening nut from deviating and loosening, and enabling the anti-loosening nut to always respond normally to the pressure of the oil to compress the spring and push the gasket to open the through hole, thereby ensuring the stability and reliability of the damping performance of the shock absorber.
[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A schematic diagram of the three-dimensional structure of a piston valve in an embodiment of the utility model is shown;
[0022] Figure 2 A schematic diagram of the three-dimensional structure of the valve body in the embodiment of the utility model is shown;
[0023] Figure 3 A schematic diagram of the top view of the valve body in an embodiment of the utility model is shown;
[0024] Figure 4 A three-dimensional structural schematic diagram of a bolt assembly in an embodiment of the utility model is shown;
[0025] Figure 5 A schematic diagram of the exploded structure of the bolt assembly in the embodiment of the utility model is shown;
[0026] Figure 6 A schematic diagram showing the structure of the bolt assembly and the valve body in the embodiment of the utility model;
[0027] Figure 7 A schematic diagram showing the structure of the anti-rotation nut matching the first countersunk hole in the embodiment of the utility model;
[0028] Figure 8 A schematic diagram showing the structure of a piston valve assembled on a shock absorber in an embodiment of the utility model is shown. DETAILED DESCRIPTION
[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art.
[0030] The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated description will be omitted.
[0031] The words "first", "second" and similar words used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationship indicated by the terms "upper" and "lower" etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model. The term "plurality" means two or more, unless otherwise clearly and specifically defined. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.
[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.
[0033] Figure 1 The three-dimensional structure of the piston valve in the embodiment of the utility model is shown in FIG. Figure 2 The three-dimensional structure of the valve body of the piston valve is shown in FIG. Figure 3 The top view of the valve body is shown. Figure 4 The three-dimensional structure of the bolt assembly of the piston valve is shown. Figure 5 The exploded structure of the bolt assembly is shown. Figure 6 The structure of the bolt assembly and the valve body is shown in figure. Figure 7 The diagram shows the structure in which the anti-rotation nut of the bolt assembly cooperates with the first countersunk hole of the valve body. Figure 8 The structure of the piston valve being assembled on the shock absorber is shown; Figures 1 to 8 As shown, the piston valve 100 provided in the embodiment of the utility model comprises:
[0034] The valve body 110 and the bolt assembly 120, wherein the valve body 110 is provided with a through hole 111 with a first countersunk hole 111a, and the bolt assembly 120 comprises a bolt 121 which passes through the through hole 111 with a gap, a washer 122 which is sleeved on the nut end of the bolt 121, and a spring 123 which is sleeved on the screw end of the bolt 121 and accommodated in the first countersunk hole 111a;
[0035] The locking nut 124 is tightened on the end of the screw rod, the inner wall of the first counterbore 111a is formed with a plurality of convex ribs 1110, the outer wall of the locking nut 124 is formed in a non-circular shape, and the outer wall of the locking nut 124 clamps the plurality of convex ribs 1110;
[0036] The gasket 122 can seal and cover the through hole 111 , and the anti-loosening nut 124 can compress the spring 123 and push the gasket 122 through the bolt 121 .
[0037] The piston valve 100 of the utility model realizes anti-rotation limitation of the anti-loosening nut 124 by clamping the non-circular anti-loosening nut 124 on the outer wall in the first countersunk hole 111a with the convex rib 1110 on the inner wall, thereby preventing the anti-loosening nut 124 from deviating and loosening, so that the anti-loosening nut 124 can always respond normally to the pressure of the oil to compress the spring 123 and push the gasket 122 to open the through hole 111, thereby ensuring the stability and reliability of the damping performance of the shock absorber.
[0038] During specific operation: in a natural state, the gasket 122 seals and covers the through hole 111; if the first countersunk hole 111a faces the upper working chamber 210 of the shock absorber 200, when the oil in the upper working chamber 210 pushes the anti-loosening nut 124, causing the anti-loosening nut 124 to compress the spring 123 and push the gasket 122 through the bolt 121, the through hole 111 is connected, and the oil can enter the lower working chamber 220 from the upper working chamber 210; when the pressure in the upper working chamber 210 decreases, the anti-loosening nut 124 is reset under the action of the spring 123, and the gasket 122 is pulled by the bolt 121 to seal and cover the through hole 111. Thanks to the special anti-rotation design between the anti-loosening nut 124 and the first countersunk hole 111a, the anti-loosening nut 124 is limited and will not rotate, thereby maintaining the preload force of the spring 123, realizing the damping force control of the piston valve 100, and making the damping characteristics of the shock absorber 200 meet the requirements. Similarly, if the first countersunk hole 111a faces the lower working chamber 220 of the shock absorber 200, the oil in the lower working chamber 220 pushes the anti-loosening nut 124, causing the anti-loosening nut 124 to compress the spring 123 and push the gasket 122 through the bolt 121, and the through hole 111 is connected, and the oil can enter the upper working chamber 210 from the lower working chamber 220; when the pressure in the lower working chamber 220 decreases, the anti-loosening nut 124 is reset under the action of the spring 123, and the gasket 122 is pulled by the bolt 121 to seal and cover the through hole 111. Thanks to the special anti-rotation design between the anti-loosening nut 124 and the first countersunk hole 111a, the anti-loosening nut 124 is limited and will not rotate, thereby maintaining the preload force of the spring 123, realizing the damping force control of the piston valve 100, and making the damping characteristics of the shock absorber 200 meet the requirements.
[0039] In some embodiments, the first counterbore 111 a is formed by a plurality of circular counterbores, and the plurality of circular counterbores at least partially overlap to form a plurality of ribs 1110 .
[0040] The first countersunk hole 111a is formed by a plurality of circular countersunk holes, which is convenient for processing and forming. The plurality of circular countersunk holes at least partially overlap, so that a convex rib 1110 is formed on the inner wall of the first countersunk hole 111a at the overlapped position.
[0041] In some embodiments, the outer wall of the anti-loosening nut 124 is formed into an elliptical shape; alternatively, the anti-loosening nut 124 is a polygonal nut, and the outer wall of the polygonal nut is formed with a plurality of edges 1240 , wherein at least some of the edges 1240 clamp the plurality of ribs 1110 .
[0042] The outer contour of the anti-loosening nut 124 is elliptical or polygonal, and can be clamped with the ribs 1110 of the first countersunk hole 111a to prevent rotation. In the case where the anti-loosening nut 124 is a polygonal nut, at least part of the facets 1240 of the polygonal nut clamps the multiple ribs 1110 of the first countersunk hole 111a, so that a more stable anti-rotation fit between the anti-loosening nut 124 and the first countersunk hole 111a can be achieved.
[0043] In some embodiments, the first countersunk hole 111a is formed by three circular countersunk holes arranged side by side, wherein the circular countersunk hole 111a1 in the middle is larger than the circular countersunk holes 111a2 on both sides, the circular countersunk holes 111a2 on both sides are spaced apart, and the circular countersunk hole 111a1 in the middle overlaps with the circular countersunk holes 111a2 on both sides to form four convex ribs 1110; the anti-loosening nut 124 is an octagonal nut, and the four non-adjacent edges 1240' of the octagonal nut respectively clamp the four convex ribs 1110.
[0044] The first countersunk hole 111a with four convex ribs 1110 is formed by three circular countersunk holes arranged side by side. The structure is symmetrical and stable. The number and position distribution of the formed convex ribs 1110 are reasonable, which is conducive to the anti-rotation cooperation with the anti-loosening nut 124. The anti-loosening nut 124 is an octagonal nut. The four non-adjacent edges 1240' of the octagonal nut clamp the four convex ribs 1110 respectively, which not only realizes the stable anti-rotation cooperation with the first countersunk hole 111a, but also facilitates the stable movement of the convex ribs 1110 for a proper distance under the push of oil to compress the spring 123 and push the gasket 122.
[0045] In some embodiments, the spring 123 is accommodated in the circular counterbore 111a1 located in the middle; the outer diameter of the spring 123 matches the inner diameter of the circular counterbore 111a1 located in the middle. In this way, the spring 123 is stably accommodated in the circular counterbore 111a1 located in the middle, and the spring 123 is prevented from twisting and deflecting, so that the spring 123 maintains a stable preload, thereby ensuring the stability and reliability of the damping performance of the shock absorber 200.
[0046] In some embodiments, the through hole 111 has a second countersunk hole 111 b , and the second countersunk hole 111 b and the first countersunk hole 111 a are respectively located at two end surfaces of the valve body 110 ; in the natural state of the spring 123 , the gasket 122 seals and covers the second countersunk hole 111 b .
[0047] The second counterbore 111 b facilitates the oil flow; at the same time, the middle section of the through hole 111 still retains a narrower portion that is clearance-matched with the bolt 121 , so that the bolt 121 is stably inserted into the through hole 111 .
[0048] In some embodiments, a plurality of first countersunk holes 111a are formed on both end surfaces of the valve body 110. Thus, in the extension stroke and the compression stroke of the piston rod, the oil between the upper working chamber 210 and the lower working chamber 220 can be exchanged through the piston valve 100. Of course, the shock absorber 200 is also equipped with other valve systems for achieving oil exchange between different cylinders, and the utility model does not limit this.
[0049] In some embodiments, along the circumference of the valve body 110 , a plurality of through holes 111 alternately form first countersunk holes 111 a on both end surfaces of the valve body 110 , and the first countersunk holes 111 a on each end surface of the valve body 110 are evenly spaced.
[0050] For example, Figures 1 to 3 The valve body 110 is shown to be provided with six through holes 111, and along the circumference of the valve body 110, the six through holes 111 respectively form first countersunk holes 111a and second countersunk holes 111b alternately and evenly spaced on each end surface of the valve body 110. In this way, the oil exchange between the upper working chamber 210 and the lower working chamber 220 is stable and balanced, which is conducive to achieving stable and reliable damping characteristics of the shock absorber 200.
[0051] In some embodiments, the piston valve 100 further includes: a locking nut 125, which is tightened on the end of the screw and presses the anti-loosening nut 124. The locking nut 125 presses the anti-loosening nut 124 to tighten and fix the anti-loosening nut 124. In this way, the preload force of the control spring 123 is effectively maintained through the double nut structure.
[0052] Further, refer to Figure 8 , and combined Figures 1 to 7 As shown, the embodiment of the utility model further provides a shock absorber 200, and the piston rod end of the shock absorber 200 is equipped with the piston valve 100 described in any of the above embodiments.
[0053] The shock absorber 200 adopts the above-mentioned piston valve 100, which can clamp the non-circular anti-loosening nut 124 on the outer wall in the first countersunk hole 111a with the convex rib 1110 on the inner wall to achieve anti-rotation limitation of the anti-loosening nut 124, avoid the anti-loosening nut 124 from deviating and loosening, and enable the anti-loosening nut 124 to always respond normally to the pressure of the oil to compress the spring 123 and push the gasket 122 to open the through hole 111, thereby ensuring the stability and reliability of the damping performance of the shock absorber 200.
[0054] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A piston valve, comprising a valve body and a bolt assembly, wherein the valve body is provided with a through hole with a first countersunk hole, and the bolt assembly comprises a bolt having a gap passing through the through hole, a gasket sleeved on a nut end of the bolt, and a spring sleeved on a screw end of the bolt and accommodated in the first countersunk hole, characterized in that: The inner wall of the first counterbore is formed with a plurality of convex ribs, the piston valve further comprises a locking nut tightened on the end of the screw, the outer wall of the locking nut is formed in a non-circular shape, and the outer wall of the locking nut clamps the plurality of convex ribs; Wherein, the gasket can seal and cover the through hole, and the anti-loosening nut can compress the spring and push the gasket through the bolt.
2. The piston valve according to claim 1, characterized in that The first counterbore is formed by a plurality of circular counterbores, and the plurality of circular counterbores at least partially overlap to form the plurality of ribs.
3. The piston valve according to claim 2, characterized in that The outer wall of the anti-loosening nut is formed into an elliptical shape; or The anti-loosening nut is a polygonal nut, and the outer wall of the polygonal nut is formed with a plurality of edges, wherein at least part of the edges clamp the plurality of convex ribs.
4. The piston valve according to claim 3, characterized in that The first countersunk hole is formed by three circular countersunk holes arranged side by side, wherein the circular countersunk hole in the middle is larger than the circular countersunk holes on both sides, the circular countersunk holes on both sides are spaced apart, and the circular countersunk hole in the middle overlaps with the circular countersunk holes on both sides to form four convex ribs; The anti-loosening nut is an octagonal nut, and the four non-adjacent edges of the octagonal nut clamp the four convex ribs respectively.
5. The piston valve according to claim 4, characterized in that The spring is accommodated in the circular countersunk hole located in the middle; The outer diameter of the spring matches the inner diameter of the circular countersunk hole in the middle.
6. The piston valve according to claim 1, characterized in that The through hole has a second countersunk hole, and the second countersunk hole and the first countersunk hole are respectively located at the two end surfaces of the valve body; In the natural state of the spring, the gasket seals and covers the second countersunk hole.
7. The piston valve according to claim 1, characterized in that The through holes include a plurality of holes, and the two end surfaces of the valve body are respectively formed with a plurality of the first countersunk holes.
8. The piston valve according to claim 7, characterized in that Along the circumference of the valve body, a plurality of through holes alternately form the first countersunk holes on both end surfaces of the valve body, and the first countersunk holes on each end surface of the valve body are evenly distributed.
9. The piston valve according to any one of claims 1 to 8, characterized in that: Also includes: The locking nut is tightened on the end of the screw rod and compresses the anti-loosening nut.
10. A shock absorber, characterized in that: The piston rod end of the shock absorber is equipped with a piston valve as described in any one of claims 1-9.