End cover for shock absorber and shock absorber

Abstract

The utility model relates to the technical field of shock absorbers, and provides an end cover for a shock absorber and the shock absorber. The end cover for the shock absorber comprises an annular body, the inner circumferential wall of the annular body is provided with a mounting part and a non-mounting part, and the non-mounting part is provided with a groove; and the felt is embedded in the groove and is concave inwards in the radial direction relative to the mounting part. According to the end cover for the shock absorber, the felt is embedded in the groove formed in the non-mounting part of the inner peripheral wall of the end cover for the shock absorber, and the felt is concave inwards in the radial direction relative to the mounting part, so that the structural strength and the mounting stability of the end cover for the shock absorber are not affected, the felt is prevented from being damaged due to axial impact force, and seeping oil can be effectively prevented from overflowing to the outer cylinder wall of the shock absorber. The end cover for the shock absorber is simple in manufacturing process, controllable in cost, capable of being suitable for shock absorbers of any suitable models such as front shock absorbers, rear shock absorbers and air spring shock absorbers, and capable of effectively preventing qualified shock absorbers with normal oil leakage from being misjudged as oil leakage pieces.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to an end cover for a shock absorber and a shock absorber. Background Art

[0002] During the operation of the shock absorber, normal oil seepage often occurs, and the seeping oil will overflow to the outer cylinder wall of the shock absorber through the gap between the components. This oil seepage phenomenon is sometimes mistaken for oil leakage, resulting in poor user experience and unnecessary replacement of the shock absorber.

[0003] Based on this, the design of the shock absorber needs to consider the problem of leaking oil overflowing to the outer cylinder wall of the shock absorber. The current solutions to this problem are mainly:

[0004] Reference Figure 1 As shown, an oil absorption pad 13 is arranged between the end cover 11 and the oil seal 12 of the shock absorber. The disadvantage is that during the operation of the shock absorber, the buffer block assembled on the connecting rod 14 will hit the end cover 11, and the oil absorption pad 13 is easily damaged under the action of the axial impact force;

[0005] The disadvantage of increasing the oil storage space on the upper end of the end cover is that the height of the upper end of the end cover needs to be increased, resulting in insufficient strength of the end cover, and the oil usually cannot be effectively stored on the upper end of the end cover.

[0006] 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

[0007] In view of this, the utility model provides an end cover for a shock absorber and a shock absorber, by embedding felt in the non-installation portion of the inner circumferential wall of the end cover for the shock absorber, which does not affect the structural strength and installation stability of the end cover for the shock absorber, avoids damage to the felt due to axial impact force, and can effectively prevent the seeping oil from overflowing to the outer cylinder wall of the shock absorber.

[0008] According to one aspect of the utility model, an end cover for a shock absorber is provided, comprising: an annular body, the inner circumferential wall of the annular body having a mounting portion and a non-mounting portion, the non-mounting portion being provided with a groove; and felt embedded in the groove and radially concave relative to the mounting portion.

[0009] In some embodiments, the felt is glued into the groove.

[0010] In some embodiments, the groove is formed as an annular groove, in which an annular felt is embedded; or, the groove includes a plurality of arcuate grooves spaced apart circumferentially, in each of which an arcuate felt is embedded.

[0011] In some embodiments, the radial thickness of the felt is between 1 mm and 4 mm.

[0012] In some embodiments, the height of the felt along the axial direction is between 5 mm and 100 mm.

[0013] In some embodiments, the mounting portion is formed as a mounting rib, the mounting rib is used for interference fit with the outer cylinder wall of the shock absorber, and the felt is used for clearance fit or interference fit with the outer cylinder wall.

[0014] In some embodiments, the end surface of the annular body is provided with a connecting rod through hole, and the inner end surface of the connecting rod through hole is provided with an avoidance slope.

[0015] In some embodiments, a buffer boss is provided on the outer end surface of the connecting rod through hole.

[0016] According to another aspect of the utility model, a shock absorber is provided, wherein the end of the outer cylinder wall of the shock absorber is equipped with an end cover for the shock absorber as described in any of the above embodiments; wherein the mounting portion of the end cover for the shock absorber has an interference fit with the outer cylinder wall, and the felt of the end cover for the shock absorber has a clearance fit or an interference fit with the outer cylinder wall.

[0017] In some embodiments, the shock absorber is any one of a front shock absorber, a rear shock absorber, and an air spring shock absorber.

[0018] Compared with the prior art, the beneficial effects of the present invention include at least:

[0019] The utility model has a groove in the non-installation portion of the inner circumferential wall of the shock absorber end cover and embedded with felt, and the felt is radially concave relative to the installation portion. This does not affect the structural strength and installation stability of the shock absorber end cover, and avoids damage to the felt due to axial impact force, and can effectively prevent the seeped oil from overflowing to the outer cylinder wall of the shock absorber.

[0020] When the shock absorber leaks oil, a small amount of oil can be absorbed on the felt; the size / thickness of the felt is determined according to the design requirements for oil loss to prevent the leaking oil from overflowing to the outer cylinder wall of the shock absorber, while avoiding the problem that excessive oil absorption may cause the shock absorber oil leakage to not be discovered in time.

[0021] The utility model has a simple manufacturing process for the end cover for the shock absorber, and the cost is controllable. It can be applied to any suitable type of shock absorber, such as a front shock absorber, a rear shock absorber, an air spring shock absorber, etc., and can effectively prevent a qualified shock absorber with normal oil leakage from being misjudged as an oil leaking part.

[0022] 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

[0023] 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.

[0024] Figure 1 A schematic diagram showing an oil absorption pad in a conventional shock absorber arranged between an end cover and an oil seal;

[0025] Figure 2 A schematic diagram of the three-dimensional structure of the end cover for the shock absorber in the embodiment of the utility model is shown;

[0026] Figure 3 A schematic cross-sectional view of the end cover for a vibration damper in an embodiment of the utility model is shown;

[0027] Figure 4 A schematic structural diagram of a felt end cover for a shock absorber in an embodiment of the utility model is shown;

[0028] Figure 5 The schematic diagram of the structure of the assembly of the end cover for the shock absorber and the shock absorber in the 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] In the description of the present invention, the terms "circumferential", "axial", "radial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which 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, and therefore cannot be understood as a limitation on the present invention. The term "plurality" means two or more, unless otherwise clearly and specifically defined. In addition, in the description of the present invention, 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 2 The three-dimensional structure of the end cover for the shock absorber in the embodiment of the utility model is shown, wherein no felt is installed; Figure 3 The cross-sectional structure of the end cover for the vibration damper in the embodiment of the utility model is shown. Figure 4 The structure of the felt of the end cover of the shock absorber in the embodiment of the utility model is shown in FIG. Figure 5 The structure of the assembly of the end cover for the shock absorber and the shock absorber in the embodiment of the utility model is shown in FIG. Figures 2 to 5 As shown, the end cover 200 for the shock absorber provided in the embodiment of the utility model comprises:

[0034] The annular body 210 has an inner peripheral wall having a mounting portion 211 and a non-mounting portion 212, and the non-mounting portion 212 is provided with a groove 220;

[0035] The felt 230 is embedded in the groove 220 and is radially concave relative to the mounting portion 211 .

[0036] In the utility model, a felt 230 is embedded in a groove in the non-installation portion 212 of the inner circumferential wall of the end cover 200 for the shock absorber, and the felt 230 is radially concave relative to the installation portion 211. This does not affect the structural strength and installation stability of the end cover 200 for the shock absorber, and avoids the felt 230 from being damaged due to axial impact force, and can effectively prevent the seeped oil from overflowing to the outer cylinder wall 310 of the shock absorber 300.

[0037] When oil leakage occurs in the shock absorber 300, a small amount of oil can be adsorbed on the felt 230; the size / thickness of the felt 230 is determined according to the design requirements for oil loss to prevent the leaking oil from overflowing to the outer cylinder wall 310 of the shock absorber 300, while avoiding the problem that excessive oil absorption may cause the shock absorber 300 to leak and not be discovered in time.

[0038] The shock absorber end cover 200 of the utility model has a simple manufacturing process and controllable cost, and can be applied to any suitable type of shock absorber 300 such as front shock absorber, rear shock absorber, air spring shock absorber, etc., and can effectively prevent a qualified shock absorber with normal oil leakage from being misjudged as an oil leaking part.

[0039] In some embodiments, the felt 230 is pasted in the groove 220. By pasting, the felt 230 is conveniently and firmly embedded in the groove 220.

[0040] In some embodiments, the groove 220 is formed as an annular groove, and an annular felt is embedded in the annular groove. In some embodiments, the groove 220 includes a plurality of arcuate grooves spaced apart in the circumferential direction, and an arcuate felt is embedded in each arcuate groove.

[0041] According to the outer cylinder specifications of the shock absorber 300 to which the shock absorber end cover 200 is applicable, the felt 230 can be set as a whole circle around the outer cylinder wall 310 of the shock absorber 300, or be set in sections along the circumference as needed, so as to achieve appropriate absorption of the seeping oil that overflows to the outer cylinder wall 310 of the shock absorber 300, while avoiding excessive oil absorption that causes oil leakage of the shock absorber 300 to not be discovered in time.

[0042] Figures 2 to 4 In the figure, it is shown that the groove 220 includes three arc-shaped grooves, and correspondingly, the felt 230 includes arc-shaped felts respectively embedded in the three arc-shaped grooves, but the present invention is not limited thereto.

[0043] In some embodiments, the radial thickness of the felt 230 is between 1 mm and 4 mm. For example, the thickness of the felt 230 can be set to 1 mm, 2 mm, 2.8 mm, 4 mm, and so on.

[0044] In some embodiments, the height of the felt 230 along the axial direction is between 5 mm and 100 mm. For example, the height of the felt 230 can be set to 5 mm, 10 mm, 20 mm, 30 mm, 100 mm, and so on.

[0045] When designing the dimensional parameters such as the thickness and height of the felt 230, it can be determined based on the dimensional parameters of the annular body 210 and the required oil absorption amount, so as to achieve the goal of achieving an appropriate amount of absorption of the leaking oil that overflows to the outer cylinder wall 310 of the shock absorber 300 by the felt 230, while avoiding excessive oil absorption that causes oil leakage of the shock absorber 300 to not be discovered in time.

[0046] In some cases, when the end cover 200 for shock absorber is applied to a shock absorber 300 of special specifications, the dimensional parameters such as thickness and height of the felt 230 are not limited to the ranges listed above, but can be determined according to actual working conditions. After the end cover 200 for shock absorber is assembled to the shock absorber 300 of special specifications, the felt 230 can appropriately absorb the leaking oil that overflows to the outer cylinder wall 310 of the shock absorber 300, so as to avoid the qualified shock absorber 300 with normal oil leakage from being misjudged as an oil leaking part, and at the same time avoid excessive oil absorption to cover up the oil leakage problem of the shock absorber 300.

[0047] In some embodiments, the mounting portion 211 is formed as a mounting rib, the mounting rib is used for interference fit with the outer cylinder wall 310 of the shock absorber 300 , and the felt 230 is used for clearance fit or interference fit with the outer cylinder wall 310 .

[0048] The installation ribs are interference fit with the outer cylinder wall 310, so that the end cover 200 for the shock absorber can be stably assembled to the outer cylinder of the shock absorber 300. The felt 230 is radially concave relative to the installation portion 211, so as to avoid affecting the normal assembly of the end cover 200 for the shock absorber with the shock absorber 300 through the installation portion 211; the felt 230 and the outer cylinder wall 310 are clearance fit or interference fit, which depends on the thickness of the felt 230.

[0049] In some embodiments, a connecting rod through hole 240 is disposed on the end surface of the annular body 210 , and an avoidance slope 244 is disposed on the inner end surface of the connecting rod through hole 240 .

[0050] The connecting rod through hole 240 is used for the connecting rod 330 of the shock absorber 300 to pass through and extend into the working chamber. The avoidance slope 244 is used to avoid the lip of the oil seal 320 to prevent interference.

[0051] In some embodiments, a buffer boss 250 is disposed on the outer end surface of the connecting rod through hole 240 .

[0052] The buffer boss 250 is used to contact the buffer block to prevent abnormal noise during the operation of the shock absorber; through the cooperation between the buffer boss 250 and the buffer block, the vibration of the shock absorber end cover 200 is also absorbed to prevent the shock absorber end cover 200 from vibrating violently and causing excessive friction and extrusion between the felt 230 and the outer cylinder wall 310 and causing damage.

[0053] Continue to combine Figures 2 to 5 As shown, an embodiment of the utility model further provides a shock absorber 300, wherein the end of the outer cylinder wall 310 of the shock absorber 300 is equipped with an end cover 200 for the shock absorber; wherein the mounting portion 211 of the end cover 200 for the shock absorber has an interference fit with the outer cylinder wall 310, and the felt 230 of the end cover 200 for the shock absorber has a clearance fit or an interference fit with the outer cylinder wall 310.

[0054] The shock absorber 300 is equipped with the shock absorber end cover 200, which can achieve the following beneficial effects:

[0055] By slotting and embedding the felt 230 in the non-installation portion 212 of the inner wall of the end cover 200 for the shock absorber, and the felt 230 being radially concave relative to the installation portion 211, it is achieved that the structural strength and installation stability of the end cover 200 for the shock absorber are not affected, and the end cover 200 for the shock absorber is ensured to be firmly assembled with the shock absorber 300 through the installation portion 211, and the felt 230 is avoided from being damaged due to axial impact force, which can effectively prevent the seeped oil from overflowing to the outer cylinder wall 310 of the shock absorber 300.

[0056] When oil leakage occurs in the shock absorber 300, a small amount of oil can be adsorbed on the felt 230; the size / thickness of the felt 230 is determined according to the design requirements for oil loss to prevent the leaking oil from overflowing to the outer cylinder wall 310 of the shock absorber 300, while avoiding the problem that excessive oil absorption may cause the shock absorber 300 to leak and not be discovered in time.

[0057] The shock absorber end cover 200 has a simple manufacturing process and controllable cost. It can be applied to any suitable type of shock absorber 300 such as front shock absorber, rear shock absorber, air spring shock absorber, etc., and can effectively prevent a qualified shock absorber with normal oil leakage from being misjudged as an oil leaking part.

[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. An end cap for a vibration damper, characterized in that: include: An annular body, wherein the inner peripheral wall of the annular body has a mounting portion and a non-mounting portion, and the non-mounting portion is provided with a groove; The felt is embedded in the groove and is radially concave relative to the mounting portion.

2. The end cap for a vibration damper according to claim 1, characterized in that: The felt is pasted in the groove.

3. The end cap for a vibration damper according to claim 1, characterized in that: The groove is formed as an annular groove, and an annular felt is embedded in the annular groove; or The groove comprises a plurality of arcuate grooves which are distributed at intervals in the circumferential direction, and an arcuate felt is embedded in each of the arcuate grooves.

4. The end cap for a vibration damper according to claim 1, characterized in that: The thickness of the felt in the radial direction is between 1 mm and 4 mm.

5. The end cap for a vibration damper according to claim 1, characterized in that: The height of the felt along the axial direction is between 5 mm and 100 mm.

6. The end cap for a vibration damper according to claim 1, characterized in that: The mounting portion is formed as a mounting rib, the mounting rib is used for interference fit with the outer cylinder wall of the shock absorber, and the felt is used for clearance fit or interference fit with the outer cylinder wall.

7. The end cap for a vibration damper according to claim 1, characterized in that: The end surface of the annular body is provided with a connecting rod through hole, and the inner end surface of the connecting rod through hole is provided with an avoidance inclined surface.

8. The end cap for a vibration damper according to claim 7, characterized in that: The outer end surface of the connecting rod through hole is provided with a buffer boss.

9. A shock absorber, characterized in that: The end of the outer cylinder wall of the shock absorber is equipped with an end cover for the shock absorber according to any one of claims 1 to 8; Wherein, the mounting portion of the end cover for the shock absorber has an interference fit with the outer cylinder wall, and the felt of the end cover for the shock absorber has a clearance fit or an interference fit with the outer cylinder wall.

10. The vibration absorber according to claim 9, characterized in that The shock absorber is any one of a front shock absorber, a rear shock absorber, and an air spring shock absorber.

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