Fixed type constant velocity cardan joint with oil grooves

Abstract

The invention relates to front and rear wheel transmission shaft connection of automobiles or other machine drive equipment, in particular to a fixed type constant velocity cardan joint of front wheel driving steering connection for automobiles. The invention aims to provide a fixed type constant velocity cardan joint with oil grooves, which has excellent lubrication condition and prolonged service life. The fixed type constant velocity cardan joint with oil grooves is provided with a bell shaped housing and an inner race housing; the inner surface of the bell shaped housing and the outer surface of the inner race housing are both provided with a plurality of annular channels; and steel balls are arranged in the channels and retainers are arranged among the steel balls for fixing the relative positions of the steel balls; and first oil grooves are arranged at the bottoms of the channels on the inner surface of the bell shaped housing so as to keep excellent lubrication condition in the cardan joint, thereby prolonging the service life of the cardan joint.

Description

technical field [0001] The invention relates to the connection of front and rear wheel transmission shafts of automobiles or other mechanical transmission equipment, in particular to a fixed type constant velocity universal joint used for driving and steering connections of front wheels of automobiles. Background technique [0002] Since the birth of the first car in 1886, more than 80% of small cars (cars) have adopted front-wheel drive. In front-wheel drive, the front wheels of the car are both driving wheels and steering wheels. As a steering wheel, it is required that the wheel can be arbitrarily swung to a certain angle within a certain range of angles to meet the needs of vehicle steering. As a driving wheel, the transmission shaft is required to transmit power from the gearbox to the wheels during the deflection process of the wheels. The mechanism that transmits power between the two shafts where the two axes do not coincide and the relative positions often change is...

AI Technical Summary

Problems solved by technology

Moreover, the force is large, and the steel ball is easy to squeeze the grease away. After a certain period of use, the groove is not lubricated with grease, so the contact point between the steel ball and the jacket and the star sleeve groove is easy to produce corrosion points or depressions.

Although the current universal joint manufacturers have made the cross section of the channel into a double circular arc shape, the steel ball and the channel contact are placed at an angle of 45 degrees, and a gap of 0.02-0.08mm is left between the steel ball and the bottom of the channel (such as Figure 2-2 d1 in the center), to supply grease continuously, which can prolong the life in theory, but in fact, because the gap is too small, continuous lubrication cannot be achieved, and the actual effect is not obvious

If the gap is enlarged, the contact surface between the steel ball and the groove is too small, which will lead to faster wear and shorter life

[0009] 4) The constant velocity universal joint is a high-precision part with a small fit gap. During the rotation process, the grease inside the cavity cannot be continuously supplied to the mating surface due to poor fluidity due to the rotational inertia, resulting in increased frictional resistance and transmission Efficiency drops significantly, resulting in severe heating of the universal joint, which reduces the life of the universal joint

[0010] Based on the above shortcomings, there is one commonality. The current fixed constant velocity universal joints have poor lubrication conditions, resulting in short life. If good lubrication conditions can be provided, the service life of the universal joints can be greatly extended.

Images