Electric wheel with large-gear-ratio planetary reducer and vehicle

Abstract

The invention provides an electric wheel with a large-gear-ratio planetary reducer and a vehicle. The electric wheel comprises a hub motor, a hub brake, the one-stage large-gear-ratio planetary reducer, a hub assembly and a rim. A gear shaft of a sun gear of the one-stage planetary reducer is connected with a rotor shaft of the hub motor through a jack shaft, and a gear ring is connected with a motor shaft body end cover flange through a gear ring fixing frame. A planetary carrier is connected with the rim, and motor power is transmitted to the rim through speed reduction and torsion increasing of the one-stage planetary reducer, and finally acts on a tire. Oppositely-arranged hub bearings are mounted on the left side of the motor end cover flange, and external components of the hub assembly are supported by the bearings so as to achieve bearing of the wheel. According to the electric wheel, through connection design of the planetary reducer and the hub assembly, large-transmission-ratio speed reduction and torsion increasing of the motor power are achieved, the ground load of the tire, the motor power and mechanical braking force are reasonably transmitted in a hub, interface matching and torque and rotating speed characteristic matching among the high-speed hub motor, the low-speed rim and the hub brake are achieved, and the electric wheel is low in weight, high in integration level, compact in structure, efficient in transmission, and particularly suitable for being applied to the large-torque and heavy-load heavy vehicle adopting the electric wheel for driving.

Description

technical field [0001] The invention belongs to the technical field of electric drive of electric vehicles, and in particular relates to an electric wheel with a planetary speed reducer with a large transmission ratio and a vehicle with the same. Background technique [0002] The electric wheel technology is also called the built-in motor technology in the wheel. The motor is also called the hub motor. The biggest feature is that the power device, the transmission device and the braking device are all integrated into the wheel hub, which greatly simplifies the mechanical part of the electric vehicle. Compared with other driving forms, it has many advantages such as short transmission chain, high transmission efficiency and flexible layout. The obvious advantages of electric vehicles using electric wheel technology in terms of overall vehicle layout, dynamic performance and control have attracted widespread attention from academia and industry. [0003] The reducer is to imp...

AI Technical Summary

Problems solved by technology

For the existing gear reducer, the reduction ratio is small and the axial size is large, which makes it difficult to meet the size limited by the installation of the hub motor; and it makes it difficult to arrange the hub brake

Although the multi-stage planetary reducer scheme proposed by the patent CN106864251A can achieve a large reduction ratio, the structure is complex and the axial size increases

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