An oil-leakage-proof transmission shaft universal joint

Abstract

The invention discloses an oil-leakage-proof transmission shaft universal joint. The transmission shaft universal joint includes a pressure relief device, a casing device, a transmission device, a shaft tube and a splined shaft rod. The shaft tube is fixedly connected with the casing device, the pressure relief device and the transmission device are sequentially installed in the casing device, and the spline shaft is fixedly connected with the casing device; the design of the pressure relief device is adopted , the ventilation slot is canceled, so that it has the advantage of preventing grease leakage in the universal joint.

Description

technical field [0001] The invention relates to vehicle parts, in particular to an oil leakage-proof transmission shaft universal joint. Background technique [0002] The propeller shaft is one of the main components of the automobile transmission system and is widely used in four-wheel drive vehicles. The transmission shaft is composed of universal joints, shaft tubes, built-in shock absorbers and balance weights and other sub-parts, among which the universal joint is the core component of the transmission shaft, which can guarantee the function of rotating in any direction of 360° and transmitting torque, depending on the internal structure , and divided into constant velocity and non-constant velocity universal joints. The constant velocity universal joint consists of sub-parts such as steel balls, cages, sheaths, sheath covers, inner star wheels, outer star wheels, and washers. [0003] During the operation of the whole vehicle, due to the design structure of the whole...

AI Technical Summary

Problems solved by technology

[0004] Because the sheath is equipped with ventilation grooves, the internal grease will leak out of the ventilation grooves during high-speed rotation. If the universal joint is near a heat source, the grease will be thinner and more likely to leak from the ventilation grooves. leak out

After grease leakage, on the one hand, it will reduce the internal lubrication effect of the universal joint, on the other hand, it will also cause appearance problems of parts, causing customers to complain

At present, the common practice of various OEMs is to isolate the heat source through layout optimization, but there is no optimization method for mass production of the section itself.

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