Shock absorber

Abstract

The utility model relates to the technical field of automobile parts, and provides a shock absorber which comprises a cylinder barrel, a connecting rod extending into the cylinder barrel, an oil seal embedded in a port of the cylinder barrel and matched with the connecting rod, a cover plate arranged outside the port of the cylinder barrel, and a dust cover connected with the cover plate and arranged outside the cylinder barrel in a sleeving mode. Wherein the cover plate and a port of the cylinder barrel are spaced, the shock absorber further comprises a protective cover which is arranged between the port of the cylinder barrel and the cover plate, a base portion of the protective cover is assembled with the port of the cylinder barrel, a lip of the protective cover is sleeved with the connecting rod in a sealing mode, and a condensation cavity is formed between a body of the protective cover and the connecting rod. According to the shock absorber, the protective cover is additionally arranged between the end opening of the cylinder barrel and the cover plate, oil mist condensed on the outer wall of the cylinder barrel and the dust cover due to the fact that oil in the cylinder barrel volatilizes outwards can be prevented, the product appearance and function implementation of the shock absorber are prevented from being affected, a connecting rod and an oil seal of the shock absorber can be protected, and the service life of the shock absorber is prolonged. And external dust is prevented from adhering to the connecting rod, contacting with the oil seal and damaging a sealing lip of the oil seal by friction.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a shock absorber. Background Art

[0002] Shock absorbers usually work under continuous high-temperature conditions. The oil in the cylinder is easy to evaporate, causing condensed oil mist to form on the dust cover and outer cylinder of the shock absorber, affecting the product appearance and function of the shock absorber.

[0003] Specifically, see Figure 1 The conventional shock absorber comprises an outer cylinder 10', an inner cylinder 20', a connecting rod 30' extending into the inner cylinder 20', a cover plate 40' arranged at the end of the outer cylinder 10', and a dust cover 50' connected to the cover plate 40' and sleeved outside the outer cylinder 10'; the ends of the inner cylinder 20' and the outer cylinder 10' are also provided with a guide 60' for the connecting rod 30' to pass through, and the end surface of the guide 60' is equipped with an oil seal 66'. During the operation of the shock absorber, the connecting rod 30' reciprocates axially, compressing / stretching the oil in the inner cylinder 20', causing the oil to vaporize under continuous high temperature conditions, volatilize outward through the gap between the oil seal 66' and the connecting rod 30', and finally condense on the outer cylinder 10' and the dust cover 50', generating oil mist.

[0004] 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

[0005] In view of this, the utility model provides a shock absorber, in which a protective cover is added between the port of the cylinder and the cover plate, which can prevent the oil in the cylinder from evaporating outwards and generating oil mist condensed on the outer wall of the cylinder and the dust cover, so as to avoid affecting the product appearance and function of the shock absorber, and can protect the connecting rod and oil seal of the shock absorber, and prevent external sand and dust from adhering to the connecting rod and contacting the oil seal to rub and damage the sealing lip of the oil seal.

[0006] One aspect of the utility model provides a shock absorber, comprising a cylinder, a connecting rod extending into the cylinder, an oil seal embedded in a port of the cylinder and cooperating with the connecting rod, a cover plate arranged outside the port of the cylinder, and a dust cover connected to the cover plate and sleeved outside the cylinder; wherein the cover plate is spaced apart from the port of the cylinder, and the shock absorber further comprises: a protective cover arranged between the port of the cylinder and the cover plate, a base portion of the protective cover being assembled with the port of the cylinder, a lip of the protective cover sealingly sleeved with the connecting rod, and a condensation chamber being formed between the body of the protective cover and the connecting rod.

[0007] In some embodiments, the port of the cylinder is embedded with a guide for the connecting rod to pass through and extend into the cylinder; wherein the port of the cylinder is flanged inward, and the shock absorber further includes: an angle ring, including a ring seat portion crimped between the end face of the guide and the port of the cylinder, and a waist portion connected to the ring seat portion, and the base portion is assembled with the waist portion.

[0008] In some embodiments, the base portion is sleeved on the waist portion and is sealed and press-fitted with the waist portion via a clamping ring.

[0009] In some embodiments, the end edge of the waist is curled outward, and the base portion and the clamping ring are limited by the end edge of the waist.

[0010] In some embodiments, the main body of the oil seal is embedded in the end face of the guide, and the sealing lip of the oil seal abuts the connecting rod; the ring seat portion is crimped against the end face of the guide and the main body of the oil seal, the waist is spaced apart from the sealing lip of the oil seal, and the portion of the waist facing the sealing lip forms an arc portion.

[0011] In some embodiments, a chamfered groove is provided at the end edge of the guide, and a sealing ring which is sealed with the inner wall of the cylinder is embedded in the chamfered groove.

[0012] In some embodiments, the lip of the protective cover is formed in a wave shape and is press-fitted with the connecting rod by interference.

[0013] In some embodiments, the protective cover is made of rubber.

[0014] In some embodiments, the protective cover is spaced apart from the cover plate.

[0015] In some embodiments, the cylinder is the outer cylinder of the shock absorber, and the shock absorber also includes an inner cylinder coaxially and gap-fitted in the outer cylinder; wherein the connecting rod extends into the inner cylinder, and the condensation chamber is used to condense oil and gas volatilized from the inner cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention include at least:

[0017] The shock absorber of the utility model is provided with a protective cover between the port of the cylinder and the cover plate, and the protective cover is stably assembled with the port of the cylinder through the base part; the lip sealing sleeve of the protective cover is connected with the connecting rod, and a condensation chamber is formed between the main body of the protective cover and the connecting rod, which can prevent the oil in the cylinder from evaporating outwards and generating oil mist condensed on the outer wall of the cylinder and the dust cover, so that the volatilized oil gas is retained in the condensation chamber for cooling and condensation to avoid leakage outwards, thereby ensuring that the product appearance and function of the shock absorber are not affected; in addition, the lip sealing sleeve of the protective cover is connected with the connecting rod, which can prevent external sand and dust from adhering to the connecting rod, contacting the oil seal and rubbing to damage the sealing lip of the oil seal, thereby realizing effective protection of the connecting rod and the oil seal.

[0018] 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

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A partial cross-sectional structural schematic diagram of a current shock absorber is shown;

[0021] Figure 2 and Figure 3 A partial cross-sectional structural schematic diagram of a shock absorber in an embodiment of the utility model is shown;

[0022] Figure 4 A schematic diagram of the matching structure of the protective cover and its assembly components in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0023] 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 so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0024] In the description of the present invention, when it is said that a certain device is “connected” to another device, this includes not only a direct connection but also an indirect connection through other elements.

[0025] 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.

[0026] Figure 2 and Figure 3 The partial cross-sectional structure of the shock absorber in the embodiment of the utility model is shown. Figure 4 The matching structure of the protective cover of the shock absorber and its assembly parts is shown; Figures 2 to 4 As shown, the shock absorber provided by the embodiment of the utility model includes:

[0027] Cylinder 10, connecting rod 30 extending into cylinder 10, oil seal 66 embedded in port 11 of cylinder 10 and cooperating with connecting rod 30, cover plate 40 disposed outside port 11 of cylinder 10, dust cover 50 connected to cover plate 40 and sleeved outside cylinder 10;

[0028] Wherein, the cover plate 40 is spaced apart from the port 11 of the cylinder barrel 10;

[0029] The protective cover 70 is disposed between the port 11 of the cylinder 10 and the cover plate 40 . The base portion 71 of the protective cover 70 is assembled with the port 11 of the cylinder 10 . The lip 72 of the protective cover 70 is sealingly sleeved with the connecting rod 30 . A condensation chamber S is formed between the body 73 of the protective cover 70 and the connecting rod 30 .

[0030] The shock absorber of the utility model is provided with a protective cover 70 between the port 11 of the cylinder 10 and the cover plate 40, and the protective cover 70 is stably assembled with the port 11 of the cylinder 10 through the base portion 71; the lip 72 of the protective cover 70 is sealingly sleeved with the connecting rod 30, and a condensation chamber S is formed between the body 73 of the protective cover 70 and the connecting rod 30, which can prevent the oil in the cylinder from evaporating outwards and generating oil mist condensed on the outer wall of the cylinder 10 and the dust cover 50, so that the volatilized oil gas remains in the condensation chamber S for cooling and condensation to avoid leakage outwards, thereby ensuring that the product appearance and function of the shock absorber are not affected; in addition, the lip 72 of the protective cover 70 is sealingly sleeved with the connecting rod 30, which can prevent external sand and dust from adhering to the connecting rod 30 and contacting the oil seal 66 to rub and damage the sealing lip 660 of the oil seal 66, thereby achieving effective protection of the connecting rod 30 and the oil seal 66.

[0031] In some embodiments, the port 11 of the cylinder 10 is embedded with a guide 60 for the connecting rod 30 to pass through and extend into the cylinder 10; wherein, the port 11 of the cylinder 10 is flanged inward, and the shock absorber also includes: an angle ring 80, including a ring seat portion 81 crimped between the end face of the guide 60 and the port 11 of the cylinder 10, and a waist portion 82 connected to the ring seat portion 81, and the base portion 71 is assembled with the waist portion 82.

[0032] The protective cover 70 is stably assembled by the angle ring 80. Specifically, the port 11 of the cylinder 10 is turned inward, and the ring seat 81 of the angle ring 80 is pressed between the end surface of the guide 60 and the port 11 of the cylinder 10 to fix the angle ring 80; the waist 82 of the angle ring 80 extending from the ring seat 81 is fixedly assembled by the base 71 of the protective cover 70.

[0033] In some embodiments, the base portion 71 is sleeved with the waist portion 82 and is sealed and pressed with the waist portion 82 through a snap ring 92. The base portion 71 of the protective cover 70 is pressed and fixed to the waist portion 82 of the angle ring 80 through the snap ring 92 to achieve a sealed fit.

[0034] In some embodiments, the end edge 820 of the waist portion 82 is curled outward, and the base portion 71 and the clamping ring 92 are limited by the end edge 820 of the waist portion 82 .

[0035] The end edge 820 of the waist 82 is curled outward to form a limiting cavity at the waist 82, and the base portion 71 and the clamping ring 92 of the protective cover 70 are clamped in the limiting cavity to achieve fixation; in this way, with the help of the tightening effect of the clamping ring 92 and the limiting effect of the end edge 820 of the waist 82, the displacement of the base portion 71 can be effectively avoided.

[0036] In some embodiments, the main body of the oil seal 66 is embedded in the end face of the guide 60, and the sealing lip 660 of the oil seal 66 abuts against the connecting rod 30; the ring seat portion 81 is crimped against the end face of the guide 60 and the main body of the oil seal 66, the waist 82 is spaced apart from the sealing lip 660 of the oil seal 66, and the portion of the waist 82 facing the sealing lip 660 forms an arc portion.

[0037] During the movement of the connecting rod 30, the sealing lip 660 of the oil seal 66 will be deformed to a certain extent; the waist 82 of the angle ring 80 is spaced from the sealing lip 660 of the oil seal 66 to avoid interference with the sealing lip 660. The portion of the waist 82 facing the sealing lip 660 is set as an arc portion to form a uniform contact surface with a buffering effect, so that the sealing lip 660 is not damaged in the case where the sealing lip 660 is pressed against the waist 82.

[0038] In some embodiments, a chamfered groove 62 is provided at the end of the guide 60, and a sealing ring 68 is embedded in the chamfered groove 62 to seal with the inner wall of the cylinder 10. The sealing ring 68 is sealed and crimped between the chamfered groove 62 and the cylinder 10 to prevent the oil in the cavity 100 of the cylinder 10 from leaking outward.

[0039] In some embodiments, the lip 72 of the protective cover 70 is formed in a wave shape and is press-fitted with the connecting rod 30. The wave-shaped lip 72 is press-fitted with the connecting rod 30 to achieve a sealed fit between the lip 72 and the connecting rod 30, so that a condensation cavity S can be formed between the body 73 of the protective cover 70 and the connecting rod 30 to prevent oil and gas from leaking out, and the connecting rod 30 and the oil seal 66 can be protected.

[0040] In some embodiments, the protective cover 70 is made of rubber material. The protective cover 70 made of rubber has good deformation ability and sealing performance, can adapt to the working conditions of the axial reciprocating motion of the connecting rod 30, ensure continuous and reliable sealing contact with the connecting rod 30, and make the formed condensation chamber S stable and effective.

[0041] In some embodiments, the protective cover 70 is spaced apart from the cover plate 40. In the present invention, a special heightened cover plate 40 may be used to space the cover plate 40 and the protective cover 70 and reserve a space therebetween to ensure that when the cover plate 40 presses against the cylinder 10 during the movement of the shock absorber, the protective cover 70 will not be squeezed too much or even damaged by the cover plate 40.

[0042] Furthermore, in some embodiments, the cylinder 10 is the outer cylinder of the shock absorber, and the shock absorber also includes an inner cylinder 20 coaxially and gap-assembled in the outer cylinder; wherein the connecting rod 30 extends into the inner cylinder 20, and the condensation chamber S is used to condense the oil and gas volatilized from the cavity 200 of the inner cylinder 20.

[0043] In this embodiment, the shock absorber is specifically a double-tube shock absorber. By adding a protective cover 70, it can effectively prevent the oil in the inner tube 20 from evaporating outwards and generating oil mist condensed on the outer wall of the cylinder 10 and the dust cover 50.

[0044] The shock absorber of the present invention can also be applied to single-tube shock absorbers and multi-tube shock absorbers with three or more tubes. All of them can effectively prevent the oil in the cylinder from evaporating outwards and generating oil mist condensed on the outer wall of the cylinder 10 and the dust cover 50 by adding a protective cover 70 between the port 11 of the cylinder 10 and the cover plate 40, so that the volatilized oil gas remains in the condensation chamber S to cool and condense to avoid leakage to the outside, thereby ensuring that the product appearance and function of the shock absorber are not affected; in addition, it can also prevent external sand and dust from adhering to the connecting rod 30 and contacting the oil seal 66 to rub and damage the sealing lip 660 of the oil seal 66, thereby achieving effective protection of the connecting rod 30 and the oil seal 66.

[0045] 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 shock absorber, comprising a cylinder, a connecting rod extending into the cylinder, an oil seal embedded in a port of the cylinder and cooperating with the connecting rod, a cover plate arranged outside the port of the cylinder, and a dust cover connected to the cover plate and sleeved outside the cylinder; It is characterized in that The cover plate is spaced apart from the port of the cylinder barrel, and the shock absorber further comprises: A protective cover is arranged between the port of the cylinder and the cover plate. The base of the protective cover is assembled with the port of the cylinder. The lip of the protective cover is sealed and sleeved with the connecting rod. A condensation chamber is formed between the body of the protective cover and the connecting rod.

2. The shock absorber according to claim 1, characterized in that A guide for the connecting rod to pass through and extend into the cylinder is embedded in the port of the cylinder; Wherein, the port of the cylinder is turned inward, and the shock absorber further comprises: The angle ring comprises a ring seat portion crimped between the end surface of the guide and the port of the cylinder, and a waist portion connected to the ring seat portion, and the base portion is assembled with the waist portion.

3. The shock absorber according to claim 2, characterized in that The base portion is sleeved on the waist portion and is sealed and pressed together with the waist portion through a clamping ring.

4. The shock absorber according to claim 3, characterized in that The end edge of the waist is curled outwards, and the base portion and the clamping ring are limited by the end edge of the waist.

5. The shock absorber according to claim 2, characterized in that The main body of the oil seal is embedded in the end surface of the guide, and the sealing lip of the oil seal abuts against the connecting rod; The ring seat portion is pressed against the end surface of the guide and the main body of the oil seal, the waist portion is spaced apart from the sealing lip of the oil seal, and a portion of the waist portion facing the sealing lip forms an arc portion.

6. The shock absorber according to claim 2, characterized in that The end edge of the guide is provided with a chamfered groove, in which a sealing ring which is sealed and matched with the inner wall of the cylinder is embedded.

7. The shock absorber according to claim 1, characterized in that The lip of the protective cover is formed in a wave shape and is press-fitted with the connecting rod by interference.

8. The vibration absorber according to claim 1, characterized in that The protective cover is made of rubber material.

9. The vibration absorber according to claim 1, characterized in that: The protective cover is spaced apart from the cover plate.

10. The shock absorber according to any one of claims 1 to 9, characterized in that: The cylinder is the outer cylinder of the shock absorber, and the shock absorber further comprises an inner cylinder coaxially and gap-fitted in the outer cylinder; The connecting rod extends into the inner cylinder, and the condensation chamber is used to condense the oil and gas volatilized from the inner cylinder.

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