Drive axle based on half-shaft bearing novel installation system

Abstract

The invention relates to a drive axle based on a half-shaft bearing novel installation system. A brake assembly is arranged on a rear axle housing assembly in a sleeving manner, and a half shaft assembly is mounted on the rear axle housing assembly. The drive axle is characterized in that a half shaft is sleeved with a half shaft bearing, a bearing bush is pressed on the outer side of the half shaft bearing, an inner oil seal is arranged on the surface of the bearing bush, a snap spring is arranged on the outer side of the bearing bush and fixed on the half shaft, an oil seal bush is arrangedon one side of the half shaft bearing, an outer oil seal is pressed on the inner diameter of the oil seal bush, and a bearing baffle is arranged on one side of the outer oil seal and presses and fixesthe half shaft bearing through a brake assembly; and an oil baffle disc is installed between the bearing baffle and the inner side end face of the half shaft, and a brake drum is installed at the endof the half shaft through half shaft bolts. The lightweight drive axle meets the design service life and the axial bearing capacity required by a whole vehicle, meanwhile, the hidden danger that a tapered roller bearing of the drive axle fails due to lack of lubricating grease is eradicated, and the potential safety hazard that gear oil leaks into a brake under extreme conditions to cause failureof a brake system is eradicated.

Description

technical field [0001] The invention relates to the technical field of commercial vehicle drive axles, in particular to a drive axle based on a novel mounting system for half-shaft bearings. Background technique [0002] With the increasingly fierce competition in the automobile market, various OEMs have made the cost reduction and lightweight work of the entire vehicle a long-term task. As a major part of the vehicle transmission system, the drive axle accounts for about 3%-4% of the vehicle cost, and its weight accounts for about 4%-6% of the vehicle weight. Reduce the cost and weight of the drive axle Can bring substantial benefits to the vehicle. [0003] As we all know, the half-shaft bearings of traditional light passenger cars and pickup drive axles are generally press-fitted in the cavity of the bearing seat, such as figure 1 As shown, the traditional light bus and pickup drive axle includes 1a brake drum; 2a half shaft bolt; 3a half shaft; 4a brake assembly; 5a an...

AI Technical Summary

Problems solved by technology

However, the bearing positioning gland it uses is made of forged parts, and it needs to be machined to ensure the accuracy and rigidity of the parts. There are certain restrictions in technology, which makes the bearing capacity of the half shaft bearing low, so it is only suitable for miniature cars, etc. Drive axle with low load

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