CN-114179581-B - Bushing for vehicle and method of assembling the same

Abstract

A bushing for a vehicle and an assembling method thereof may include an elastic body closely connected to an outer surface of an inner structure, a bearing configured such that the elastic body is coupled to an inner surface of the bearing, a housing coupled to the outer surface of the bearing to be in sliding contact with the bearing and mounted on a target object to which the housing is to be mounted, and a seal mounted between both ends of the bearing and both ends of the housing to seal a sliding contact surface between the bearing and the housing.

Inventors

• Li Shangmen

Assignees

• 现代自动车株式会社
• 起亚株式会社

Dates

Publication Date

20260512

Application Date

20210607

Priority Date

20200914

Claims (19)

1. 1. A bushing, comprising: an elastomer configured to be coupled to an outer surface of the inner structure; a bearing, wherein the elastomer is coupled to an inner surface of the bearing; a housing coupled to an outer surface of the bearing to be in sliding contact with the bearing and mounted on a target object to which the housing is to be mounted, and A seal mounted on at least one of a first end and a second end of the bearing, and a first end and a second end of the housing to seal a sliding contact surface between the bearing and the housing, Wherein one or more ribs are formed to protrude from an inner surface of the bearing in a circumferential direction, a longitudinal direction, and a diagonal direction of the bearing to enhance rigidity of the bearing, guide the elastic body interference-fitted into the bearing, and adjust a position of the elastic body.
2. 2. The bushing of claim 1, wherein a first constraining terminal is formed at a longitudinal center of the bearing and a second constraining terminal connected to the first constraining terminal is formed at a longitudinal center of the housing to limit longitudinal relative movement between the bearing and the housing.
3. 3. The bushing of claim 2, wherein the first and second constraint terminals have the same cross-sectional shape, the cross-sectional shape being formed to be concave in an inward direction thereof, to be convex in an outward direction thereof, or to have one or more uneven or tapered surfaces.
4. 4. A bushing according to claim 1, wherein the elastomer is integrally formed with the inner surface of the bearing by injection molding, or assembled with the inner surface of the bearing by interference fit for a predetermined time, and then attached to the inner surface of the bearing using an adhesive.
5. 5. The bushing of claim 1, wherein an insert that enhances the stiffness of the elastomer is placed in the elastomer when the elastomer is manufactured by molding.
6. 6. The bushing of claim 1, wherein a lubricant reservoir hole or a lubricant reservoir is formed at a predetermined position of the bearing.
7. 7. The bushing of claim 1, wherein a first seal mounting terminal is formed to extend from the first and second ends of the bearing and a second seal mounting terminal is formed to extend from the first and second ends of the housing to mount the seal therein.
8. 8. The bushing of claim 7, wherein the seal comprises: A main body portion in which the first seal mounting terminal of the bearing is pressed into an inner surface of the main body portion; A first rib including an outer rib and an inner rib extending from an inner end portion of an outer diameter of the main body portion and expanding at a prescribed angle therebetween to be connected to the second seal mounting terminal, and And a second rib extending from an inner end portion of an inner diameter of the body portion in a horizontal direction to be connected to an outer surface of the elastic body.
9. 9. The bushing of claim 7, wherein the seal comprises: A main body portion in which the second seal mounting terminal of the housing is pressed into an inner surface of the main body portion, and A single rib including an auxiliary rib extending from an inner end portion of an inner diameter of the main body portion to be connected to the first seal mounting terminal of the bearing.
10. 10. The bushing of claim 7, wherein the seal comprises: a main body portion in which the first seal mounting terminal of the bearing is pressed into an inner surface of the main body portion, and A single rib including an auxiliary rib extending from an inner end portion of an outer diameter of the main body portion to be connected to the second seal mounting terminal of the housing.
11. 11. The bushing of claim 7, wherein the seal comprises: a first main body portion having a C-shaped cross section and including a contact rib pressed into a space between the first seal mounting terminal of the bearing and the second seal mounting terminal of the housing, and A second body part having an L-shaped cross section and including a coupling rib formed on an inner surface thereof such that the first body part is pressed into the coupling rib.
12. 12. The bushing of claim 7, wherein a groove is formed in the first seal mounting terminal of the bearing or the second seal mounting terminal of the housing, and a snap ring configured to limit an outer surface of the seal is mounted in the groove to prevent the seal from separating.
13. 13. The bushing of claim 7, wherein a position adjustment stopper protrudes from a predetermined position of the seal, and a position adjustment recess is formed in the first seal mounting terminal of the bearing or the second seal mounting terminal of the housing, the position adjustment stopper being inserted into the position adjustment recess.
14. 14. The bushing according to claim 1, Wherein the bearing comprises a first bearing portion and a second bearing portion configured to couple to each other to form a spherical section with the elastomer, Wherein the housing includes an upper housing portion and a lower housing portion configured to couple to each other to surround the first and second bearing portions, and Wherein a position adjustment pin and a position adjustment recess are formed on and in the first bearing portion and the second bearing portion to assemble the first bearing portion and the second bearing portion to each other.
15. 15. The bushing of claim 14, wherein a parting line between the first bearing portion and the second bearing portion is spaced apart from a parting line between the upper housing portion and the lower housing portion by a predetermined angle.
16. 16. The bushing of claim 14, wherein lubricant injection holes are formed in outer surfaces of the upper and lower housing portions or lubricant storage grooves are formed in inner surfaces of the upper and lower housing portions, the upper and lower housing portions being in contact with the bearing, and mounting terminals configured to be mounted on the target object to which the housing is to be mounted are formed at the upper and lower housing portions.
17. 17. The bushing of claim 15, wherein the elastomer includes a first elastomer portion and a second elastomer portion that are integrally formed with the inner surfaces of the first bearing portion and the second bearing portion, respectively, by injection molding, or are attached to or pressed into the inner surfaces of the first bearing portion and the second bearing portion, respectively, or are manufactured as a unitary structure having one parting line and are attached to or pressed into the inner surfaces of the first bearing portion and the second bearing portion, respectively.
18. 18. A method for assembling a bushing, the method comprising: manufacturing a first bearing portion and a second bearing portion to be assembled with each other to form a bearing, respectively; Separately manufacturing an upper housing part and a lower housing part to be assembled with each other to form a housing; Integrally forming a first elastic body portion and a second elastic body portion with inner surfaces of the first bearing portion and the second bearing portion by injection molding, or connecting the first elastic body portion and the second elastic body portion to the inner surfaces of the first bearing portion and the second bearing portion using an adhesive; inserting a pair of seals into the inner structure to be spaced apart from each other; Connecting the first and second elastomer portions to an outer surface of the inner structure; Coupling the upper and lower housing portions to outer surfaces of the first and second bearing portions, and assembling the upper and lower housing portions so as to couple the upper and lower housing portions to outer surfaces of the first and second bearing portions and to a vehicle body; Mounting the seal between the first and second ends of the bearing and the first and second ends of the housing to seal a sliding contact surface between the bearing and the housing, and Mounting the seal individually in a first seal mounting terminal of the bearing or a second seal mounting terminal of the housing, or pressing the seal individually into a space between the first seal mounting terminal and the second seal mounting terminal to seal a sliding contact surface between the bearing and the housing, Wherein a parting line between the upper housing portion and the lower housing portion is spaced apart from a parting line between the first bearing portion and the second bearing portion by a predetermined angle when the upper housing portion and the lower housing portion are coupled to outer surfaces of the first bearing portion and the second bearing portion.
19. 19. A method for assembling a bushing, the method comprising: manufacturing a first bearing portion and a second bearing portion to be assembled with each other to form a bearing, respectively; Separately manufacturing an upper housing part and a lower housing part to be assembled with each other to form a housing; Integrally forming a first elastic body portion and a second elastic body portion with inner surfaces of the first bearing portion and the second bearing portion by injection molding, or connecting the first elastic body portion and the second elastic body portion to the inner surfaces of the first bearing portion and the second bearing portion using an adhesive; inserting a pair of seals into the inner structure to be spaced apart from each other; connecting the first and second elastomer portions to an outer peripheral surface of the inner structure; pressing the outer surfaces of the first bearing portion and the second bearing portion by a holding jig and mounting the seal in a first seal mounting terminal of the bearing to seal a sliding contact surface between the bearing and the housing, and Removing the holding jig, connecting the upper housing portion and the lower housing portion to the outer surfaces of the first bearing portion and the second bearing portion, and then assembling the upper housing portion and the lower housing portion so as to connect the upper housing portion and the lower housing portion to the outer surfaces of the first bearing portion and the second bearing portion and to the vehicle body, Wherein a parting line between the upper housing portion and the lower housing portion is spaced apart from a parting line between the first bearing portion and the second bearing portion by a predetermined angle when the upper housing portion and the lower housing portion are coupled to outer surfaces of the first bearing portion and the second bearing portion.

Description

Bushing for vehicle and method of assembling the same Technical Field The present invention relates to a bushing for a vehicle and a method of assembling the same. More particularly, the present invention relates to a bushing for a vehicle for mounting various internal structures on a vehicle body to control the performance of the vehicle body and absorb vibrations, and a method of assembling the same. Background In general, various internal structures such as a stabilizer bar, a cowl cross member, a steering shaft, and a suspension shaft are mounted on a vehicle body through bushings in the vehicle. In these internal structures, as a conventional bush for mounting a stabilizer bar on a vehicle body, a bush including a ball bearing (ball bearing) or a rolling bearing (roller bearing) is used. For example, a conventional bushing includes an elastic body formed by injection molding and provided on an outer diameter portion of a stabilizer bar, a housing mounted on a vehicle body, a bearing mounted between the elastic body and the housing, and a seal integrally formed with the elastic body to seal both sides of the bearing. However, the conventional bushing has the following problems. First, due to the tapered nature of the stabilizer bar, the housing and the elastomeric seal are easily moved away from each other, and thus foreign matter is easily entered into the bearing, thereby deteriorating the functions of the seal and the bearing. Second, the seal is integrally formed with the elastomer, and therefore, the position of the seal for sealingly sealing the bearing cannot be freely adjusted, and the seal cannot ensure its ability to completely seal the bearing. The information disclosed in the background of the invention section is only for enhancement of understanding of the general background of the invention and is not to be construed as forming an admission or any form of suggestion that this information forms the prior art that is known to a person skilled in the art. Disclosure of Invention Aspects of the present invention are directed to providing a bushing for a vehicle and an assembling method thereof having a novel structure, which can provide a degree of freedom in determining an installation position of a seal, impart the seal with the ability to completely seal a bearing, and stably fix an operation of an inner structure for controlling behavior of a vehicle body and an operation of an inner structure for absorbing vibration. Aspects of the present invention relate to providing a bushing for a vehicle including an elastic body closely connected to an outer surface of an inner structure, a bearing configured such that the elastic body is coupled to an inner surface of the bearing, a housing coupled to the outer surface of the bearing to be in sliding contact with the bearing and mounted on a target object to which the housing is to be mounted, and a seal mounted on at least one of first and second ends of the bearing and first and second ends of the housing to seal a sliding contact surface between the bearing and the housing. In various exemplary embodiments of the present invention, a first constraint terminal may be formed at each of a longitudinal center or both ends of the bearing, and a second constraint terminal, which may be configured to be closely connected to the first constraint terminal, may be formed at each of the longitudinal center or both ends of the housing to restrict a longitudinal relative movement between the bearing and the housing. In another exemplary embodiment of the present invention, the first constraint terminal and the second constraint terminal may have the same cross-sectional shape, which is formed to be concave in an inward direction thereof, formed to be convex in an outward direction thereof, or formed to have one or more uneven surfaces or tapered surfaces. In yet another exemplary embodiment of the present invention, the elastic body may be integrally formed with the inner surface of the bearing by injection molding, or the elastic body may be assembled with the inner surface of the bearing by interference fit, or temporarily assembled with the inner surface of the bearing by interference fit, and then connected to the bearing using an adhesive. In yet another exemplary embodiment of the present invention, when the elastic body is manufactured by molding, an insert configured to enhance rigidity of the elastic body may be placed in the elastic body. In yet another exemplary embodiment of the present invention, one or more ribs may protrude from an inner surface of the bearing in circumferential, longitudinal and diagonal directions of the bearing to enhance rigidity of the bearing, thereby guiding the elastic body interference-fitted into the bearing, and adjusting a position of the elastic body. In another exemplary embodiment of the present invention, a lubricant reservoir hole or a lubricant reservoir groove may be formed at a predetermined position of th