Composite bushing of shock absorber

Abstract

The utility model discloses a composite bushing of a shock absorber. The composite bushing comprises an inner bushing, the composite bush has the advantages that the mounting grooves are annularly formed outside the bush pipe, one rolling shaft is mounted in each mounting groove through the corresponding rotating shaft, and meanwhile the grooves are formed in the portions, matched with the rolling shafts, of the bush pipe, so that when the composite bush is used, the composite bush rotates along with an automobile shock absorber, and the service life of the composite bush is prolonged. The rolling shaft can be used for achieving rotation of the lining pipe relative to the inner lining, so that the rotation angle of the lining pipe relative to the installation shaft piece when the lining pipe rotates along with the automobile shock absorber is reduced, the friction effect borne by the lining pipe in the rotation process is reduced, and the service life of the lining pipe is longer; meanwhile, the two sides of the rubber sleeve are limited through the limiting shoulders on the outer side of the neck bush, the tedious operation of additionally installing an end cover is omitted, the assembling process of the composite bush of the automobile shock absorber is more efficient, and efficient assembling and using of the composite bush of the automobile shock absorber are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of shock absorbing devices for connecting automobile parts, in particular to a shock absorber composite bushing. Background Art

[0002] Rubber bushings are commonly found in flexible connections between automobile assemblies and rod systems. Their structural form is mainly to use flexible materials such as rubber as bushings and install them on the car body, followed by bonding metal tubes and rubber as bushings. This type of bushing can bear a large load and can be used on large car bodies. However, due to the physical properties of the flexible material itself, the bushing often causes deviation, tilting, and eccentric wear during use. In more serious cases, the shock absorber bushing will have problems such as "axial retraction" and "insufficient press fit". The long-term torsion of the rubber layer is prone to aging, wear, cracking, etc., resulting in a short service life. Moreover, since this type of bushing is installed by interference fit, the rubber layer is prone to "accumulation", "axial retraction", "insufficient press fit", and excessive rubber deformation during press fit, resulting in deviation, tilting, eccentric wear, and poor shock absorption under heavy loads during use, which can cause safety hazards in severe cases.

[0003] A Chinese patent with announcement number CN212536502U discloses a shock absorber composite bushing installed at both ends of the shock absorber, involving the technical field of automobile shock absorbers, including a rubber matrix, an inner bushing, a bushing tube and a mounting groove, wherein the bushing tube is arranged on the inner wall of the inner bushing, the inner bushing is arranged on the inner wall of the rubber matrix, the outer wall of the rubber matrix is ​​provided with a mounting groove, and the end fixing sleeve of the shock absorber is arranged on the mounting groove, and end covers are also screwed at both ends of the bushing tube, and the end covers are abutted against the rubber matrix.

[0004] The shock absorber composite bushing described in the above patent can significantly improve the overall wear resistance and aging resistance of the composite bushing through the cooperation between the inner bushing and the bushing tube when in use, and limit the rubber matrix to avoid axial shrinkage of the rubber matrix and the phenomenon of inadequate press-fitting. At the same time, the torsional freedom space of the bushing when in use can be increased by opening a mounting groove outside the rubber matrix. However, in the composite bushing of the above structure, the inner bushing and the bushing tube are fixedly connected, and the bushing tube rotates with the automobile shock absorber relative to the mounting shaft when the composite bushing is in use. The bushing tube is easily subjected to greater friction during the rotation process due to the excessive rotation angle between the bushing tube and the mounting shaft during rotation, thereby shortening the service life of the bushing tube. At the same time, since the composite bushing of the above structure limits the rubber matrix by installing end covers at both ends of the rubber matrix, the entire assembly process of the composite bushing is more complicated, which is convenient for efficient assembly and use of the composite bushing. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a composite bushing for a shock absorber which can reduce the rotation angle of the bushing tube relative to the mounting shaft when the bushing tube rotates with the automobile shock absorber and can effectively limit the two ends of the rubber sleeve without installing end covers.

[0006] The utility model is achieved through the following technical scheme: the utility model proposes a shock absorber composite bushing, including an inner bushing, wherein two ends of the outer side of the inner bushing are respectively provided with a limit shoulder, a rubber sleeve is installed between the limit shoulders, a bushing tube is installed on the inner side of the inner bushing, a mounting groove is provided in the middle of the outer wall of the bushing tube in a ring shape, a rotating shaft is installed in each of the mounting grooves, a roller is installed in the middle of the rotating shaft, and a groove is provided on the inner wall of the inner bushing at a position cooperating with the roller.

[0007] By adopting the above technical solution, when the composite bushing rotates with the automobile shock absorber during use, the roller can be used to realize the rotation of the bushing tube relative to the inner bushing, so as to reduce the rotation angle of the bushing tube relative to the mounting shaft when rotating with the automobile shock absorber, reduce the friction exerted on the bushing tube during the rotation process, and extend the service life of the bushing tube. At the same time, the limiting shoulders on the outer side of the inner bushing are used to limit the two sides of the rubber sleeve, eliminating the tedious operation of additionally installing end covers, making the assembly process of the composite bushing of the automobile shock absorber more efficient.

[0008] Furthermore, a buffer groove is provided in an annular shape on the inner wall of the rubber sleeve, and the vertical cross-section of the buffer groove is an arc-shaped structure.

[0009] By adopting the above technical solution, the buffer groove can increase the torsional freedom space of the composite bushing when in use.

[0010] Furthermore, the outer diameter of the rubber sleeve is larger than the outer diameter of the limiting shoulder, and the inner diameter of the rubber sleeve is the same as the inner diameter of the limiting shoulder.

[0011] By adopting the above technical solution, it can be ensured that the rubber sleeve is reliably clamped and fixed on the outside of the inner bushing, and the end of the rubber sleeve is blocked and limited under the action of the limiting shoulder.

[0012] Furthermore, a connecting ring is sleeved on the outer side of the rubber sleeve, and the connecting ring is plugged into the outer wall of the rubber sleeve.

[0013] By adopting the above technical solution, the connecting ring is mainly used to connect the composite bushing with the automobile shock absorber.

[0014] Furthermore, both ends of the rotating shaft are rotatably connected to the mounting groove, and the roller is welded to the rotating shaft.

[0015] By adopting the above technical solution, the rotating shaft can realize the convenient rotation of the roller relative to the mounting groove.

[0016] Furthermore, the outer wall of the roller extends out of the mounting groove, and the outer wall of the roller contacts the groove.

[0017] By adopting the above technical solution, the groove and the roller are in cooperative contact, so that the bushing tube can be reliably installed in the inner bushing.

[0018] Furthermore, the cross-section of the groove is an annular structure, and the groove is formed on the inner sleeve.

[0019] By adopting the above technical solution, convenient rotation of the roller relative to the groove can be achieved.

[0020] Furthermore, the limiting shoulder is formed on the inner bushing, the inner bushing is a wear-resistant metal sleeve, and the bushing tube is a nylon tube.

[0021] By adopting the above technical solution, the wear resistance of the composite bushing can be effectively ensured.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model provides an installation groove in an annular shape on the outside of the bushing tube, and installs a roller in each installation groove through a rotating shaft, and provides a groove at the matching position of the bushing tube and the roller, so that when the composite bushing rotates with the automobile shock absorber during use, the roller can be used to realize the rotation of the bushing tube relative to the inner bushing, so as to reduce the rotation angle of the bushing tube relative to the installation shaft when rotating with the automobile shock absorber, reduce the friction effect on the bushing tube during the rotation process, and extend the service life of the bushing tube. At the same time, the limiting shoulders on the outer side of the inner bushing are used to limit the two sides of the rubber sleeve, eliminating the tedious operation of additionally installing end covers, making the assembly process of the composite bushing of the automobile shock absorber more efficient, and facilitating the efficient assembly and use of the composite bushing of the automobile shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a shock absorber composite bushing described in the utility model;

[0025] Figure 2 It is a main cross-sectional view of a shock absorber composite bushing described in the utility model;

[0026] Figure 3 The utility model is a composite bushing of a shock absorber Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 It is a left sectional view of a bushing tube in a composite bushing of a shock absorber described in the utility model;

[0028] Figure 5 The utility model is a structural schematic diagram of a rubber sleeve in a composite bushing of a shock absorber.

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Connecting ring; 2. Inner bushing; 3. Bushing tube; 4. Rubber sleeve; 5. Limiting shoulder; 6. Mounting groove; 7. Roller; 8. Buffer groove; 9. Groove; 10. Rotating shaft. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] like Figure 1-Figure 3 As shown, a shock absorber composite bushing in this embodiment includes an inner bushing 2, a limiting shoulder 5 is respectively installed at the outer ends of the inner bushing 2, a rubber sleeve 4 is installed between the limiting shoulders 5, a bushing tube 3 is installed on the inner side of the inner bushing 2, and a mounting groove 6 is provided in the middle of the outer wall of the bushing tube 3 in an annular shape, a rotating shaft 10 is installed in each mounting groove 6, a roller 7 is installed in the middle of the rotating shaft 10, and a groove 9 is provided on the inner wall of the inner bushing 2 at a position cooperating with the roller 7; wherein, when the composite bushing rotates with the automobile shock absorber during use, the roller 7 can be used to realize the rotation of the bushing tube 3 relative to the inner bushing 2, so as to reduce the rotation angle of the bushing tube 3 relative to the mounting shaft when rotating with the automobile shock absorber, reduce the friction effect on the bushing tube 3 during the rotation process, so as to extend the service life of the bushing tube 3, and at the same time, the limiting shoulders 5 on the outer side of the inner bushing 2 are used to limit the two sides of the rubber sleeve 4, eliminating the cumbersome operation of additionally installing end covers, making the assembly process of the automobile shock absorber composite bushing more efficient.

[0033] like Figure 2 and Figure 5 As shown, in this embodiment, a buffer groove 8 is provided in an annular shape on the inner wall of the rubber sleeve 4. The vertical section of the buffer groove 8 is an arc-shaped structure. The buffer groove 8 can increase the torsional freedom space of the composite bushing when in use.

[0034] like Figure 1-Figure 3As shown, in this embodiment, the outer diameter of the rubber sleeve 4 is larger than the outer diameter of the limiting shoulder 5, and the inner diameter of the rubber sleeve 4 is the same as the inner diameter of the limiting shoulder 5, which can ensure that the rubber sleeve 4 is reliably clamped and fixed on the outside of the inner bushing 2, and the end of the rubber sleeve 4 is blocked and limited under the action of the limiting shoulder 5. A connecting ring 1 is also sleeved on the outside of the rubber sleeve 4, and the connecting ring 1 is plugged into the outer wall of the rubber sleeve 4. The connecting ring 1 is mainly used to connect the composite bushing with the automobile shock absorber.

[0035] like Figure 2-Figure 4 As shown, in this embodiment, both ends of the rotating shaft 10 are rotatably connected to the mounting groove 6, and the roller 7 is welded to the rotating shaft 10. The rotating shaft 10 can realize the convenient rotation of the roller 7 relative to the mounting groove 6. The outer wall of the roller 7 extends out of the mounting groove 6, and the outer wall of the roller 7 contacts with the groove 9. The groove 9 and the roller 7 cooperate with each other to realize the reliable installation of the bushing tube 3 in the inner bushing 2.

[0036] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the cross-section of the groove 9 is an annular structure, and the groove 9 is formed on the inner sleeve 2, so that the roller 7 can be easily rotated relative to the groove 9. The limit shoulder 5 is formed on the inner sleeve 2, and the inner sleeve 2 is a wear-resistant metal sleeve, and the sleeve tube 3 is a nylon tube, which can effectively ensure the wear resistance of the composite sleeve.

[0037] The specific implementation process of this embodiment is as follows: when in use, it is only necessary to connect the connecting ring 1 to the automobile shock absorber, and install the shaft connected to the shock absorber on the automobile in the bushing tube 3, so that the composite bushing can be put into use. During use, a mounting groove 6 is formed in an annular shape on the outside of the bushing tube 3, and a roller 7 is installed in each mounting groove 6 through a rotating shaft 10. At the same time, a groove 9 is formed at the matching position between the bushing tube 3 and the roller 7, so that when the composite bushing rotates with the automobile shock absorber during use, the roller 7 can be used to realize the rotation of the bushing tube 3 relative to the inner bushing 2, so as to reduce the rotation angle of the bushing tube 3 relative to the mounting shaft when rotating with the automobile shock absorber, reduce the friction suffered by the bushing tube 3 during the rotation process, and extend the service life of the bushing tube 3. At the same time, the limiting shoulder 5 on the outside of the inner bushing 2 is used to limit the two sides of the rubber sleeve 4, eliminating the cumbersome operation of additionally installing the end cover, making the assembly process of the composite bushing of the automobile shock absorber more efficient and facilitating the efficient assembly and use of the composite bushing of the automobile shock absorber.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shock absorber composite bushing, characterized in that: The invention comprises an inner bushing (2), wherein two ends of the outer side of the inner bushing (2) are respectively provided with a limit shoulder (5), a rubber sleeve (4) is provided between the limit shoulders (5), a bushing tube (3) is provided inside the inner bushing (2), a mounting groove (6) is provided in the middle of the outer wall of the bushing tube (3) in the shape of a ring, a rotating shaft (10) is provided in each of the mounting grooves (6), a roller (7) is provided in the middle of the rotating shaft (10), and a groove (9) is provided on the inner wall of the inner bushing (2) at a position cooperating with the roller (7).

2. A shock absorber composite bushing according to claim 1, characterized in that: The inner wall of the rubber sleeve (4) is also provided with a buffer groove (8) in the shape of an annulus, and the vertical cross-section of the buffer groove (8) is an arc-shaped structure.

3. The shock absorber composite bushing according to claim 1, characterized in that: The outer diameter of the rubber sleeve (4) is greater than the outer diameter of the limiting shoulder (5), and the inner diameter of the rubber sleeve (4) is the same as the inner diameter of the limiting shoulder (5).

4. The shock absorber composite bushing according to claim 1, characterized in that: A connecting ring (1) is also sleeved on the outside of the rubber sleeve (4), and the connecting ring (1) is plugged into the outer wall of the rubber sleeve (4).

5. The shock absorber composite bushing according to claim 1, characterized in that: Both ends of the rotating shaft (10) are rotatably connected to the mounting groove (6), and the roller (7) is welded to the rotating shaft (10).

6. The shock absorber composite bushing according to claim 1, characterized in that: The outer wall of the roller (7) extends out of the mounting groove (6), and the outer wall of the roller (7) is in contact with the groove (9).

7. The shock absorber composite bushing according to claim 1, characterized in that: The cross section of the groove (9) is an annular structure, and the groove (9) is formed on the inner bushing (2).

8. The shock absorber composite bushing according to claim 1, characterized in that: The limiting shoulder (5) is formed on the inner bushing (2); the inner bushing (2) is a wear-resistant metal sleeve; and the bushing tube (3) is a nylon tube.

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