Parking mechanism of automotive automatic transmission

Abstract

The invention provides a parking mechanism of an automotive automatic transmission, belonging to the automotive technical field, and the problems of complicated structure and high processing cost of the existing parking mechanism are solved. The parking mechanism of the automotive automatic transmission comprises a parking ratchet wheel connected with a differential shell, a parking pawl meshed with the parking ratchet wheel, and a positioning rail plate hinged on an automobile body, wherein, the parking pawl is hinged on the car body through a rotating shaft; the parking ratchet wheel, the parking pawl and the positioning rail plate are positioned in the same plane; the positioning rail plate is hinged with a push rod; the push rod is sequentially sheathed with a sliding part and a spring one end of which props against the end part of the sliding part, and the sliding part props against the parking pawl under the action of a pressure bar; and when the positioning rail plate rotates, the sliding part can push the parking pawl to be clamped in the ratchets of the parking ratchet wheel. The parking mechanism of the invention has the advantage of compact and simple structure, good assembly technique and the like.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a parking mechanism, in particular to a parking mechanism of an automobile automatic transmission. Background technique [0002] With the development of science and technology, automobiles have become an indispensable means of transportation for people to travel. Automobile transmissions are divided into manual and automatic transmissions according to the shifting methods. Automatic transmission has become a trend of transmission development due to its convenient operation and use. The parking mechanism is a safety device in the automatic transmission to prevent the vehicle from sliding, so that the car can be parked at a certain position or even on a slope reliably and without time limit. The parking mechanism adopts a mechanically driven structure to avoid failure. [0003] The design of the parking mechanism of the automatic transmission that has been disclosed at present...

AI Technical Summary

Problems solved by technology

[0003] The design of the parking mechanism of the automatic transmission that has been disclosed at present has the following problems: the arrangement of its shifting device and push rod generally adopts a vertical structure, and the arrangement space requires a large amount; Possibility of claw engagement; the limit structure of the push rod assembly is complex and the assembly process is poor; the installation of the parking ratchet and the differential adopts splines, the structure is complex, the processing cost is high, and the assembly process is poor; The flat spring of the position fixing device generally needs a pressure plate structure to realize the spring positioning function, with many parts and complex structure

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