High-hardness low-compression-deformation self-lubricating rubber bush used in vehicle transverse stabilizing bar

Abstract

The invention relates to a high-hardness low-compression-deformation self-lubricating rubber bush used in a vehicle transverse stabilizing bar. The rubber bush is prepared from the raw materials of, by mass, 50-70 parts of butadiene rubber, 40-65 parts of styrene-butadiene rubber, 5-8 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of a silane coupling agent Si-69, 3-9 parts of an antioxidant, 2-5 parts of a flow aid Disperaid4A, 1-5 parts of paraffin FLY-3, 10-20 parts of oleamide CP, 65-105 parts of carbon black, 3-10 parts of aromatic oil 790, 1-2 parts of sulfur, 1-1.5 parts of an accelerator CBS, 0.3-0.8 parts of an accelerator TT, and 0.1-0.3 parts of an anti-scorching agent CTP. According to the invention, raw material ratio is optimized, such that various physical and mechanical properties of the rubber bush are ensured, and the defect of the influence on entire-vehicle NVH due to noise caused by poor material resilience due to large compression permanent deformation caused by the addition of amide slippery agents is substantially ameliorated.

Description

technical field [0001] The invention relates to a rubber part used in automobile parts, in particular to a rubber bush for a high-hardness low-pressure variable self-lubricating automobile lateral stabilizer bar. Background technique [0002] A stabilizer bar is part of a car's suspension system, also known as an anti-roll bar or an anti-roll bar. When the car is turning sharply, in order to prevent the body from rolling, the stabilizer bar can transmit the force from one side of the body to the other side, so that the body can be kept level. The rubber bushing is an important part of the stabilizer bar. The stabilizer bar is connected to the subframe via rubber bushings. When the car is turning sharply, the rubber bushing is subjected to torsion and extrusion shearing forces in different directions, so the rubber bushing must have a low friction coefficient, high tensile strength, good aging resistance, good resilience and Compression set performance, while also reducing ...

AI Technical Summary

Problems solved by technology

In the automotive industry, natural rubber is mostly used as the main material for traditional stabilizer bar rubber bushes, and more paraffin wax is added to the formula. Silicone oil or grease with lubricating effect must be coated on the inner wall of the product to reduce the friction coefficient. This method is durable. Not good, cannot maintain lubricating performance for a long time

For this reason, in recent years, a rubber bushing with natural rubber and synthetic rubber as the main raw material has been developed, and an amide slip agent is added to the formula. Although this kind of rubber bush can meet the requirements of low friction coefficient, it is added The elasticity of the rubber material after the amide substance is significantly reduced, and the product is prone to dimensional deformation after loading. Due to the deformation, the fit will loosen during use, which will generate noise and affect the NVH (Noise, Vibration and Harshness) of the vehicle. Sex, including several major characteristics of automobile safety, economy, environmental protection and reliability)

Some people try to paste a layer of PTFE sheet on the inner wall of the rubber sleeve, which can greatly reduce the friction coefficient and maintain good durability, but this method is more complicated and the production cost is relatively high

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