China CN202690852U discloses an automobile suspension rubber bushing, which comprises an inner sleeve and an outer sleeve, wherein the inner sleeve and the outer sleeve are vulcanized and connected through a rubber structure, a plurality of hollow grooved rings are arranged at intervals in the circumferential direction of the rubber structure, and a plurality of convex structures extending along the axial direction of the bushing are arranged on the groove wall at one side of the hollow grooved rings; When a force is applied between the inner sleeve and the outer sleeve, the rubber between the inner sleeve and the outer sleeve will be stressed, and then it will be greatly deformed, so that the rubber and the inner sleeve or the rubber and the outer sleeve will be torn apart, and the rubber will be separated from the inner sleeve and the outer sleeve, which has great potential safety hazards.
Technical realization factors: In view of the shortcomings of the prior art, the utility model aims to provide a lower arm sleeve with high safety performance, in which the rubber is not easy to escape from between the inner sleeve and the outer sleeve during use.
The above technical purpose of the utility model is realized through the following technical scheme: the lower swing arm bushing comprises an inner sleeve and an outer sleeve, rubber is vulcanized between the inner sleeve and the outer sleeve, the two ends of the inner sleeve are respectively provided with bumpers for preventing rubber from slipping from the two ends of the inner sleeve, and the two ends of the outer sleeve are respectively provided with flanges for preventing rubber from slipping from the two ends of the outer sleeve.
According to the technical scheme, when the rubber is subjected to a large force, the rubber will be separated from the inner sleeve, and then the rubber will slide on the inner sleeve along the axial direction of the inner sleeve; At the same time, the rubber can be easily separated from the outer sleeve. When the rubber is separated from the outer sleeve, it will slide along the axial direction of the outer sleeve. According to the invention, the collision blocks are arranged at the two ends of the inner sleeve and the flanges are arranged at the two ends of the outer sleeve, so that the openings at the two ends of the outer sleeve are smaller, and the rubber can be limited by the collision blocks and the flanges when sliding, so that the rubber sleeve is not easy to escape from between the inner sleeve and the outer sleeve, and the safety performance is high when in use, and the service life of the sleeve is long.
Preferably, the cross section of the outer sleeve is annular, the rubber is provided with deformation holes along the axial direction of the outer sleeve, and the side walls of the deformation holes transition through cambered surfaces.
Due to the adoption of the technical scheme, in order to prevent the situation that the space between the inner sleeve and the outer sleeve is small, the rubber deformation is small, and the damping effect is not obvious, deformation holes are arranged on the rubber, so that the rubber can deform and absorb energy in use; However, in order to prevent the rubber from tearing from the deformation hole when it is stressed too much, the inner wall of the deformation hole is arc-shaped, which makes the inner wall of the deformation hole smooth, and the rubber is not easy to tear when it is stressed evenly.