A pure electric vehicle gearbox electronic parking mechanism

Abstract

The invention relates to an electronic transmission parking mechanism of a pure electric vehicle. The electronic transmission parking mechanism mainly comprises a cam, a T-shaped guide rail, push rods, rollers, a lead screw, a coupler and a braking motor. When the pure electric vehicle is at a P gear position, the push rods on two sides move towards the middle to clamp the triangular cam to realize transmission braking; when the pure electric vehicle is at D, R and N gear positions, the push rods go back to starting positions and loosens the cam to eliminate braking. The electronic transmission parking mechanism has the advantages that the electronic transmission parking mechanism is compact in structure, slipping of a conventional transmission parking and braking mechanism is eliminated by arranging the rollers on the push rods and the cam in a close-contact manner, and fixed point parking is realized; when the braking state cannot be eliminated due to the fact that the vehicle or the braking motor is in a failure, bolts on a rack can be loosened manually, and the braking motor together with the push rods can be dragged outwards for a certain distance to eliminate the parking and braking state; the rollers and the cam are in linear contact rolling connection, so that service life of the parking mechanism is prolonged.

Description

technical field [0001] The patent of the present invention relates to a parking device for an automobile gearbox, in particular to a parking brake mechanism for an automatic gearbox of a pure electric automobile. Background technique [0002] At present, many pure electric vehicles use manual parking devices, which makes the driver have high labor intensity and insufficient comfort. Only a few pure electric vehicles are equipped with gearbox electronic parking devices, and the existing ones are designed for pure electric vehicle parking. The performance of the parking device of the transmission is often poor, especially when parking on a slope, the parking brake mechanism of the traditional automatic transmission has the phenomenon of slipping and low control accuracy, and the car slides forward or backward after parking The phenomenon of fixed-point parking cannot be realized, which brings unstable factors to the safety of pure electric vehicles. [0003] Find relevant pat...

AI Technical Summary

Problems solved by technology

[0002] At present, many pure electric vehicles use manual parking devices, which makes the driver have high labor intensity and insufficient comfort. Only a few pure electric vehicles are equipped with gearbox electronic parking devices, and the existing ones are designed for pure electric vehicle parking. The performance of the parking device of the transmission is often poor, especially when parking on a slope, the parking brake mechanism of the traditional automatic transmission has the phenomenon of slipping and low control accuracy, and the car slides forward or backward after parking The phenomenon of fixed-point parking cannot be realized, which brings unstable factors to the safety of pure electric vehicles

[0003] Find relevant patent documents, such as CN201120391241.5 "A Gearbox Parking Mechanism" of Qianchao Bearing Co., Ltd. and Wanxiang Group Company, and Geely Automobile Company's patent document CN201020119525.4 "A Parking Brake Mechanism for Automobile Gearbox", Shanghai Automotive Group's patent document CN201120229021.2 "Parking control device for automatic transmission and automatic transmission and vehicle equipped with it", and Qianchao Bearing Co., Ltd. Wanxiang Group CN201120391262.7 "A parking control device for automatic transmission" "Mechanism" adopts a braking mechanism similar to a ratchet wheel and a pawl, which is completely different from the structure of the patent of the present invention. The patent structure of the present invention is proposed for the first time in the related field; When in the ratchet groove, the ratchet needs to continue to rotate by an angle of one tooth to park, so there will be a phenomenon that the car slides forward or backward after parking. Disadvantages of parking

Images