Planetary traction drive bearing type integral reduction hub

Abstract

The invention discloses a planetary traction drive bearing type integral reduction hub which comprises a hub body and a planetary traction drive bearing type reducer; the planetary traction drive bearing type reducer comprises a planetary traction drive gear train collectively formed by a reducer drive inner shaft, a reducer outer ring, a planetary rolling body and a planetary carrier; the planetary rolling body is matched with the reducer drive inner shaft and the reducer outer ring in a friction drive manner; and the power output end of the planetary traction drive gear train is in drive connection to the hub body. The planetary traction drive bearing type integral reduction hub simplifies combination of a wheel-side reducer and a hub bearing, enables the hub bearing to be organically integrated to a planetary traction reduction drive structure, integrates functions of speed reduction and a bearing as well as is simple and compact in structure, small in size and low in processing size.

Description

technical field [0001] The invention belongs to the technical field of hub bearings, and in particular relates to a planetary traction transmission bearing type integrated reduction hub. Background technique [0002] Hub bearing is an important component used in the wheel part of motor vehicles or electric vehicles. Its main function is to carry the weight of the vehicle body and provide precise guidance for the rotation of the hub. In the existing electric hub, in order to increase the motor speed, thereby increasing the power Density, where the reducer is usually placed. Such an electric reduction hub is usually composed of a main shaft, a hub shell, a motor, a planetary gear reducer structure and a clutch. The hub shell is installed on the main shaft through a hub bearing. On the bearing side, however, the disadvantages of the existing above-mentioned electric hubs are that they are bulky and not compact enough, and one of the important reasons is that the space inside t...

AI Technical Summary

Problems solved by technology

This type of wheel hub bearing makes full use of the space inside the bearing, thereby effectively shortening the axial dimension and greatly improving the structural compactness of the wheel hub; while the force that the wheel hub bearing bears when the car is moving is complex and diverse, such as the force transmitted by the body The radial force, the lateral force when turning, and even the bending moment generated by various road surface excitations; and the reducer in the reduction hub bearing of this structure is only used as a component for transmitting rotational power, and cannot withstand excessive radial forces. force and axial force, need to cooperate with the corresponding bearings and axial positioning device to work together, more components, resulting in more complex structure, and lower reliability; due to the pitch error of the planetary gear will cause periodic impact, resulting in Its transmission has strong volatility and high noise. At the same time, the processing and assembly of planetary gears are difficult, which is not conducive to simplifying the structure of the bearing reducer.

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