Brake gear shifting device based on motor driving and vehicle

Abstract

The invention relates to a brake gear shifting device based on motor driving and a vehicle. The brake gear shifting device comprises an assisting motor, a transmission mechanism and a gear shifting mechanism. The transmission mechanism comprises a screw rod, a nut, a cylindrical gear sleeve and a guide key, wherein an external thread is arranged on the screw rod, an internal thread matched with the external thread on the screw rod is arranged on the nut, the nut is in threaded connection with the screw rod, the cylindrical gear sleeve is arranged on the screw rod in a sleeving mode, clamping teeth are arranged at the bottom of the cylindrical gear sleeve, the nut and the cylindrical gear sleeve are connected through the guide key, the guide key is used for driving the cylindrical gear sleeve to do reciprocating linear motion on the screw rod along with the nut, and the screw rod is in transmission connection with the assisting motor. The gear shifting mechanism comprises a fan-shaped gear, a cam shaft and a cam, wherein the fan-shaped gear is engaged with the clamping teeth at the bottom of the cylindrical gear sleeve, one end of the fan-shaped gear is connected with the cam shaftthrough a spline, and the cam shaft is arranged on the cam. The self-locking performance is good, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of braking, in particular to a motor-driven brake shifting device and a vehicle. Background technique [0002] There are two main driving modes of vehicle shift actuators on the market, one is driven by a hydraulic cylinder, such as the automatic shift mechanism for a manual transmission disclosed by the publication number CN102606725A, and the other is driven by a cylinder. For example, the transmission device disclosed in the publication number CN109826947A, the shift control method, the electric vehicle drive system and the electric vehicle. The hydraulic cylinder drive and cylinder drive mode are adopted, the structure is relatively simple, and the shifting function of the car can be better realized, but due to the harsh environment of the car driving process and after a period of continuous work, the hydraulic cylinder and the cylinder will also have some unavoidable problems. problems; for example: ...

AI Technical Summary

Problems solved by technology

[0013] For this reason, it is necessary to provide a brake shifting device and vehicle based on motor drive, which solves the problems of oil leakage in the existing shift mechanism driven by hydraulic cylinders and difficulty in achieving precise control when driven by cylinders, the need to add a separate air pump and low efficiency.

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