Steering column type electric power assisting device

Abstract

A steering column type electric power assisting device comprises a shell, wherein a hollow inner rotor brushless motor is installed in the shell, a coil stator of the hollow inner rotor brushless motor is connected with the inner wall of the shell, a shaft sleeve is arranged at the center of a magnetic steel rotor of the hollow inner rotor brushless motor, and an intermediate shaft is installed in the shaft sleeve and fixedly connected with the shaft sleeve; an upper cover is installed on the shell, located at one end of the intermediate shaft and connected with a steering shaft of a vehicle steering column, a torsion rod and a torque angle sensor are installed between the steering shaft and the intermediate shaft, one end of the torsion rod is fixedly connected with the steering shaft, and the other end of the torsion rod is fixedly connected with the intermediate shaft. The device is small in occupied space, interference with peripheral parts is avoided, dismounting and mounting are easy, and the torque of the motor is amplified through a planetary gear reducer. Compared with existing electric power assisting devices, the electric power assisting device has the advantages that mechanical transmission efficiency is improved greatly, and vehicle steering can be conducted more flexibly and easily with higher stability.

Description

technical field [0001] The invention relates to an automobile steering device, in particular to a steering column type electric power booster. Background technique [0002] At present, the electric power steering systems used in various vehicles are mostly implemented by installing worm gear reduction devices on the steering column. This type of structure is limited by its own size, the transmission ratio is relatively low, and the transmission efficiency is relatively low. The motor is installed on the side of the steering column together, which takes up a lot of space. Since various assemblies and components are distributed under the instrument panel of the vehicle, the steering column of the existing vehicle often interferes with the surrounding components during assembly and maintenance. Installation and disassembly operations are difficult. Contents of the invention [0003] The purpose of the present invention is to provide a novel steering column electric booster, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the electric power steering system used in various vehicles is mostly realized by installing a worm gear reduction device on the steering column. This type of structure is limited by its own size, the transmission ratio is relatively low, and the transmission efficiency is relatively low. The motor is installed on the side of the steering column together, which takes up a lot of space. Since various assemblies and components are distributed under the instrument panel of the vehicle, the steering column of the existing vehicle often interferes with the surrounding components during assembly and maintenance. Difficult to install and remove

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