Protective gasket and shock absorber

Abstract

The utility model relates to the technical field of shock absorbers, and provides a protective gasket and a shock absorber. The protective gasket comprises a holding ring located on an inner ring, a sealing ring is arranged on the inner wall of the holding ring, and a clamping ring is arranged at the tail end of the outer wall of the holding ring. The outer wall of the assembly ring is provided with a first flange ring and a second flange ring which are arranged at an interval; the wave crest and the wave trough of the wave-shaped ring are respectively positioned at the highest point and the lowest point of the protective gasket in the axial direction. Through the holding ring and the assembling ring, the assembling strength of the protective gasket, the piston rod and the connecting cover is improved, so that the protective gasket is stably matched with the piston rod and the connecting cover all the time in the working process of the shock absorber, and falling is avoided; in addition, the deformation capacity of the protective gasket is enhanced through the wave-shaped ring for connecting the enclasping ring and the assembly ring, so that the protective gasket effectively absorbs the movement of the piston rod, and the damping and buffering effects of the shock absorber are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration dampers, in particular to a protective washer and a vibration damper. Background Art

[0002] The protective washer of the shock absorber is installed between the dust plug and the nut, the inner ring of which cooperates with the piston rod, and the outer ring cooperates with the connecting cover.

[0003] Specifically, refer to Figure 1 The cross-sectional structure of the current protective washer is shown, in which the inner ring 11 of the current protective washer 10 cooperates with the piston rod of the shock absorber, the outer ring 12 cooperates with the connecting cover on the top of the shock absorber, the dust plug assembled on the piston rod is above the upper end 13, and the nut assembled on the piston rod is below the lower end 14.

[0004] The current protective gasket 10 has the following problems:

[0005] The structural design is poor, resulting in poor deformation capacity, which is not conducive to the vibration damping effect of the shock absorber;

[0006] The assembly strength between the piston rod and the connecting cover is not enough, and it is easy to fall off during the operation of the shock absorber.

[0007] 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

[0008] In view of this, the utility model provides a protective washer and a shock absorber, which improves the assembly strength of the protective washer, the piston rod and the connecting cover through a clamping ring and an assembly ring, so that the protective washer is always firmly matched with the piston rod and the connecting cover during the operation of the shock absorber to avoid falling off; in addition, the deformation ability of the protective washer is enhanced by connecting the clamping ring and the assembly ring with a corrugated ring, so that the protective washer can effectively absorb the movement of the piston rod, thereby improving the vibration reduction and buffering effect of the shock absorber.

[0009] According to one aspect of the utility model, a protective gasket is provided for a shock absorber, the protective gasket comprising: a clamping ring located in the inner ring, the inner wall of the clamping ring is provided with a sealing ring, and the end of the outer wall of the clamping ring is provided with a clamp ring; an assembly ring located in the outer ring, the outer wall of the assembly ring is provided with a first flange ring and a second flange ring spaced apart from each other; a corrugated ring connecting the clamping ring and the assembly ring, the crest and trough of the corrugated ring being respectively located at the highest point and the lowest point of the protective gasket in the axial direction.

[0010] In some embodiments, the inner diameter of the clamping ring is smaller than the outer diameter of the piston rod of the shock absorber, and the sealing ring is adapted to the external thread of the piston rod.

[0011] In some embodiments, the wave ring extends from the top of the clamping ring, first extending obliquely downward, then extending upward along the axial direction, and is connected to the top of the assembly ring.

[0012] In some embodiments, the depth of the valley relative to the sealing ring is between 1.5 mm and 3 mm.

[0013] In some embodiments, the angle of the trough is between 30° and 60°.

[0014] In some embodiments, a press-fitting plane is formed at the connection between the corrugated ring and the clamping ring.

[0015] In some embodiments, the first flange ring radially protrudes beyond the second flange ring.

[0016] In some embodiments, the thickness of the first flange ring is greater than the thickness of the second flange ring.

[0017] In some embodiments, a process chamfer is formed at the end of the inner wall of the assembly ring.

[0018] According to another aspect of the utility model, a shock absorber is provided, comprising a support member, a connecting cover embedded in the support member, and a piston rod passing through the support member and the connecting cover and extending into a working cylinder, wherein: the shock absorber is also configured with a protective gasket as described in any of the above embodiments; the clamping ring of the protective gasket interference fits the piston rod, the sealing ring of the clamping ring is sealed and clamped into the external thread of the piston rod, the first flange ring and the second flange ring of the protective gasket interference fit clamp the connecting cover; as the piston rod moves, the corrugated ring of the protective gasket is deformed.

[0019] Compared with the prior art, the beneficial effects of the present invention include at least:

[0020] The inner wall of the clamping ring is used for interference fit with the piston rod, the sealing ring arranged on the inner wall of the clamping ring is used to clamp into the external thread of the piston rod and improve the sealing performance, and the clamp ring arranged at the end of the outer wall of the clamping ring is used to enhance the clamping force between the clamping ring and the piston rod, and make the sealing ring tightly clamp the external thread of the piston rod; through the structural design of the clamping ring, the protective gasket and the piston rod are firmly assembled. The first flange ring and the second flange ring of the assembly ring are used for interference clamping the connection cover; through the structural design of the assembly ring, the protective gasket and the connection cover are firmly assembled.

[0021] Therefore, the protective washer of the utility model improves the assembly strength with the piston rod and the connecting cover through the clamping ring and the assembly ring, so that the protective washer is always firmly matched with the piston rod and the connecting cover during the operation of the shock absorber to avoid falling off.

[0022] The wave ring connects the clamping ring and the assembly ring. The wave characteristics of the wave ring and the structural design in which the wave crest and the wave trough are respectively located at the highest point and the lowest point of the protective gasket can effectively enhance the deformation absorption capacity of the protective gasket to avoid fatigue damage. The deformation of the wave characteristics, on the one hand, conforms to the axial and non-axial movement of the piston rod, so that the clamping ring follows the piston rod and maintains a stable interference fit with the piston rod. On the other hand, the deformation of the wave characteristics absorbs and blocks the transmission of vibration to avoid the movement of the piston rod affecting the assembly ring, thereby ensuring the stable assembly of the assembly ring and the connecting cover and avoiding the protective gasket from falling off.

[0023] Therefore, the protective washer of the utility model enhances the deformation capacity of the protective washer by connecting the clamping ring and the assembling ring through the corrugated ring, so that the protective washer can effectively absorb the movement of the piston rod and avoid the protective washer from falling off, thereby improving the vibration reduction and buffering effect of the shock absorber.

[0024] 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

[0025] 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.

[0026] Figure 1 A schematic cross-sectional view of a current protective gasket is shown;

[0027] Figure 2 A schematic cross-sectional view of the protective gasket in an embodiment of the utility model is shown;

[0028] Figure 3 A schematic diagram of the structure in which a protective washer is assembled in 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 position relationship indicated by the terms "high", "low", "upper" and "lower" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of description, and do 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, they cannot be understood as limitations 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 direct connections, but also indirect connections 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 2 The cross-sectional structure of the protective gasket in the embodiment of the utility model is shown in FIG. Figure 3 The structure of the protective washer in the embodiment of the utility model is shown; Figure 2 and Figure 3 As shown, the protective gasket 200 provided in the embodiment of the utility model includes:

[0034] A clamping ring 210 is located in the inner circle, a sealing ring 211 is provided on the inner wall of the clamping ring 210, and a clamp ring 212 is provided at the end of the outer wall of the clamping ring 210;

[0035] An assembly ring 220 located at the outer ring, the outer wall of the assembly ring 220 is provided with a first flange ring 221 and a second flange ring 222 spaced apart from each other;

[0036] The wave ring 230 connects the clamping ring 210 and the assembly ring 220 , and the wave crest 230 a and the wave trough 230 b of the wave ring 230 are respectively located at the highest point and the lowest point of the protective gasket 200 in the axial direction “Z”.

[0037] The protective gasket 200 can be made of a rubber material with good elasticity.

[0038] The inner wall of the clamping ring 210 is used for interference fit with the piston rod 300, the sealing ring 211 arranged on the inner wall of the clamping ring 210 is used to clamp the external thread of the piston rod 300 and improve the sealing performance, and the clamp ring 212 arranged at the end of the outer wall of the clamping ring 210 is used to enhance the clamping force between the clamping ring 210 and the piston rod 300, and make the sealing ring 211 tightly clamp the external thread of the piston rod 300; through the structural design of the clamping ring 210, the protective gasket 200 and the piston rod 300 are firmly assembled. The first flange ring 221 and the second flange ring 222 of the assembly ring 220 are used for interference clamping the connecting cover 400; through the structural design of the assembly ring 220, the protective gasket 200 and the connecting cover 400 are firmly assembled.

[0039] Therefore, the protective washer 200 of the utility model improves the assembly strength with the piston rod 300 and the connecting cover 400 through the clamping ring 210 and the assembly ring 220, so that the protective washer 200 is always firmly matched with the piston rod 300 and the connecting cover 400 during the operation of the shock absorber to avoid falling off.

[0040] The waveform ring 230 connects the clamping ring 210 and the assembly ring 220. Through the waveform characteristics of the waveform ring 230 and the structural design in which the peak 230a and the trough 230b are respectively located at the highest point and the lowest point of the protective gasket 200, the deformation absorption capacity of the protective gasket 200 is effectively enhanced to avoid fatigue damage. The deformation of the waveform characteristics, on the one hand, conforms to the axial and non-axial movement of the piston rod 300, so that the clamping ring 210 follows the piston rod 300 and maintains a stable interference fit with the piston rod 300. On the other hand, the deformation of the waveform characteristics absorbs and blocks the transmission of vibration, preventing the movement of the piston rod 300 from affecting the assembly ring 220, thereby ensuring the stable assembly of the assembly ring 220 and the connecting cover 400, and preventing the protective gasket 200 from falling off.

[0041] Therefore, the protective washer 200 of the utility model enhances the deformation ability of the protective washer 200 by connecting the clamping ring 210 and the assembling ring 220, so that the protective washer 200 can effectively absorb the movement of the piston rod 300 and avoid the protective washer 200 from falling off, thereby improving the vibration reduction and buffering effect of the shock absorber.

[0042] In some embodiments, the inner diameter of the clamping ring 210 is smaller than the outer diameter of the piston rod 300 of the shock absorber, and the sealing ring 211 is adapted to the outer thread of the piston rod 300. In this way, the clamping ring 210 is tightly clamped to the piston rod 300, and the sealing ring 211 is clamped into the outer thread of the piston rod 300, so that the protective washer 200 and the piston rod 300 are firmly assembled.

[0043] In some embodiments, the wave ring 230 extends from the top of the clamping ring 210 , first extending obliquely downward, then extending upward along the axial direction “Z”, and is connected to the top of the assembly ring 220 .

[0044] In this way, a V-shaped waveform feature 230' is formed between the clamping ring 210 and the assembly ring 220. The V-shaped waveform feature 230' has good deformation absorption ability, and can effectively adapt to the axial and non-axial movement of the piston rod 300 to maintain the stability of the clamping ring 210, while blocking the transmission of vibration to maintain the stability of the assembly ring 220, thereby effectively protecting the gasket 200 from falling off and enhancing the vibration damping and buffering effect of the shock absorber.

[0045] In addition, the trough 230b of the V-shaped waveform feature 230' can collect impurities such as accumulated water, gravel, and dust, preventing impurities from entering the connecting cover 400; and as the piston rod 300 reciprocates, the accumulated water and other impurities can be discharged in time with the deformation movement of the protective gasket 200, preventing water from accumulating and seeping into the piston rod 300 / connecting cover 400.

[0046] In some embodiments, the depth S of the trough 230b relative to the sealing ring 211 is between 1.5 mm and 3 mm. The design of the depth S helps the wave ring 230 to achieve good deformation absorption capacity to adapt to the movement of the piston rod 300 and absorb and block the transmission of vibration.

[0047] In some embodiments, the angle α of the trough 230b is between 30° and 60°. The design of the angle α helps the wave ring 230 to achieve good deformation absorption capacity, so as to adapt to the movement of the piston rod 300 and absorb and block the transmission of vibration.

[0048] In some embodiments, a press-fitting plane 230c is formed at the connection between the corrugated ring 230 and the clamping ring 210. The press-fitting plane 230c is used for applying force to press when the protective gasket 200 is assembled to the shock absorber, so as to ensure that the protective gasket 200 is assembled in place, thereby effectively exerting the deformation absorption function.

[0049] In some embodiments, the first flange ring 221 protrudes from the second flange ring 222 in the radial direction "X". In this way, during assembly, the shorter second flange ring 222 is used to conveniently press-fit the protective gasket 200, and reverse installation can be prevented, thereby improving production efficiency. After the protective gasket 200 is pressed into place, the first flange ring 221 and the second flange ring 222 are interference-clamped to the connecting cover 400, achieving a stable fit.

[0050] In some embodiments, the thickness of the first flange ring 221 is greater than the thickness of the second flange ring 222. In this way, it is ensured that the first flange ring 221 firmly presses the connection cover 400 to avoid loosening.

[0051] Among them, the length difference between the first flange ring 221 and the second flange ring 222 along the radial direction "X" can be controlled between 2.0 mm and 3.5 mm, for example, but not limited to this; the thickness difference between the first flange ring 221 and the second flange ring 222 along the axial direction "Z" can be controlled at about 1 mm, for example, but not limited to this.

[0052] Furthermore, in some embodiments, a process chamfer 223 is formed at the end of the inner wall of the assembly ring 220. The process chamfer 223 can facilitate demoulding of the protective gasket 200 to increase the life of the mold.

[0053] The utility model also provides a vibration damper. Figure 2 and Figure 3 As shown, the shock absorber provided by the embodiment of the utility model includes:

[0054] A support member 500, a connection cover 400 embedded in the support member 500, a piston rod 300 extending into the working cylinder through the support member 500 and the connection cover 400, and a protection washer 200, wherein the protection washer 200 is located between a dust plug 600 and a nut 700 assembled on the piston rod 300;

[0055] The clamping ring 210 of the protective gasket 200 clamps the piston rod 300 with interference fit, the sealing ring 211 of the clamping ring 210 seals and clamps the external thread of the piston rod 300, and the first flange ring 221 and the second flange ring 222 of the protective gasket 200 clamp the connecting cover 400 with interference fit;

[0056] As the piston rod 300 moves, the corrugated ring 230 of the protection washer 200 is deformed.

[0057] The shock absorber of the utility model is equipped with the above-mentioned protective washer 200, and can use the clamping ring 210 and the assembly ring 220 to achieve a stable assembly of the protective washer 200, the piston rod 300 and the connecting cover 400, so that the protective washer 200 can stably exert its deformation absorption ability; and use the corrugated ring 230 connecting the clamping ring 210 and the assembly ring 220 to effectively absorb the axial movement and radial swing of the piston rod 300, thereby improving the vibration reduction and buffering effect of the shock absorber; in addition, the protective washer 200 can also effectively prevent impurities from entering the interior of the shock absorber to ensure the normal operation of the shock absorber.

[0058] 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 protective washer for a vibration damper, characterized in that: The protective gasket comprises: A clamping ring located in the inner ring, wherein a sealing ring is arranged on the inner wall of the clamping ring, and a clamping ring is arranged on the end of the outer wall of the clamping ring; An assembly ring located at the outer ring, wherein the outer wall of the assembly ring is provided with a first flange ring and a second flange ring spaced apart from each other; A wave ring is connected to the clamping ring and the assembly ring, wherein the wave crest and the wave trough of the wave ring are respectively located at the highest point and the lowest point of the protective washer in the axial direction.

2. The protective gasket according to claim 1, characterized in that: The inner diameter of the clamping ring is smaller than the outer diameter of the piston rod of the shock absorber, and the sealing ring is adapted to the external thread of the piston rod.

3. The protective gasket according to claim 1, characterized in that: The wave ring starts from the top of the clamping ring, first extends obliquely downward, then extends upward along the axial direction, and is connected to the top of the assembly ring.

4. The protective gasket according to claim 3, characterized in that: The depth of the wave valley relative to the sealing ring is between 1.5 mm and 3 mm.

5. The protective gasket according to claim 3, characterized in that: The angle of the wave trough is between 30° and 60°.

6. The protective gasket according to claim 3, characterized in that: A press-fitting plane is formed at the connection between the corrugated ring and the clamping ring.

7. The protective gasket according to claim 1, characterized in that: The first flange ring protrudes radially beyond the second flange ring.

8. The protective gasket according to claim 1, characterized in that: The thickness of the first flange ring is greater than the thickness of the second flange ring.

9. The protective gasket according to claim 1, characterized in that: The inner wall end of the assembly ring is formed with a process chamfer.

10. A shock absorber, comprising a support member, a connection cover embedded in the support member, and a piston rod passing through the support member and the connection cover and extending into a working cylinder, characterized in that: The vibration absorber is further provided with a protective washer as claimed in any one of claims 1 to 9; The clamping ring of the protective gasket clamps the piston rod with interference fit, the sealing ring of the clamping ring seals and clamps the external thread of the piston rod, and the first flange ring and the second flange ring of the protective gasket clamp the connecting cover with interference fit; As the piston rod moves, the corrugated ring of the protection washer is deformed.

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