Inclined plane slide block type control arm bush structure

Abstract

The invention discloses an inclined plane slide block type control arm bush structure, which comprises a control arm body, an outer liner tube, rubber, an inner liner tube, bolts and nuts, wherein the outer liner tube is in clearance fit through press mounting and is fixed in a control arm lining; the rubber connects the outer liner tube and the inner liner tube into a whole body; and two end faces of the inner liner tube are inclined planes. The number of restrictions of the control arm bush structure formed by matching two groups of inclined planes is 5 and has 2 restrictions more than that of plane matching, the extra restrictions can ensure that the matching is firmer, so the control arm bush structure effectively solves the problem of bolt fracture caused by bolt torque losses or matching surface relative sliding in the connection between the inner liner tube of a control arm rubber sleeve and a car body, and can satisfy the assembly with angle mounting requirements.

Description

technical field [0001] The invention belongs to the field of automobiles, in particular to a bushing structure of an inclined slide block type control arm. Background technique [0002] As people's demand for cars continues to rise, the requirements for cars are also increasing. In order to provide more comfortable cars, more and more cushioning and energy-absorbing materials are used in car design, such as the connection method of the chassis control arm. Among them, most of them are connected by rubber sleeves in order to play a certain role in buffering and absorbing energy. However, there are many deficiencies in the current connection method of this structure in automobiles. First, the control arm bushing includes the bushing outer liner, The inner lining tube of the bushing and the rubber part, the outer lining tube of the bushing are connected to the control arm body, and they are connected by press-fit interference fit, the inner lining tube is connected to the body ...

AI Technical Summary

Problems solved by technology

[0002] As people's demand for cars continues to rise, the requirements for cars are also increasing. In order to provide more comfortable cars, more and more cushioning and energy-absorbing materials are used in car design, such as the connection method of the chassis control arm. Among them, most of them are connected by rubber sleeves in order to play a certain role in buffering and absorbing energy. However, there are many deficiencies in the current connection method of this structure in automobiles. First, the control arm bushing includes the bushing outer liner, The inner lining tube of the bushing and the rubber part, the outer lining tube of the bushing are connected to the control arm body, and they are connected by press-fit interference fit, the inner lining tube is connected to the body (frame, brake), and the inner and outer lining tubes are connected The part is rubber, and then the two mating surfaces of the inner liner on the body (frame, brake) are tightened by bolts, and the mating surfaces are elastically deformed under the action of the bolt force to compress the inner liner of the bushing, so that the control arm It is connected to the body (frame, brake) through rubber sleeves, and the mating surfaces of all the inner liners and the body (frame, brake) are in the form of a plane, because the number of constraints of the plane structure is only 3, unless the bolts If the force is large enough, otherwise there will be relative sliding or relative rotation between the lining pipe and the matching surface of the vehicle body (frame, brake), which may cause the bolts to loosen and break for a long time. Secondly, the lining pipe and the body Another disadvantage of the plane fit (frame, brake) is that one mating surface can rotate around their axis arbitrarily relative to the other mating surface, so if there is any installation angle requirement in the design, it cannot be implemented. This situation is in practice Often there are, and the result is that the rubber sleeve under the whole vehicle often has internal stress in the design state, which causes the rubber sleeve to crack during the short driving process of the car, which seriously affects the service life of the rubber sleeve; Finally, as mentioned above, the mechanism of compression is to tighten the two mating surfaces of the inner liner on the body (frame, brake) by bolts, and the mating surfaces produce elastic deformation under the action of the bolt force to compress the bushing. Lining pipe, which requires high machining accuracy on the installation mating surface, and there should be no installation gap that is too large or too small. If the gap is too large, there will be too much elastic deformation when pressed, but the bolt torque is set unchanged. Yes, if the gap is too large, it is likely that there will not be enough elastic deformation to cause the bolts to be tightened and loosened. If the gap is too small, it will be difficult or even impossible to assemble during the assembly process, which seriously affects the production cycle.

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