Ball screw executing mechanism driven by electric automobile parking P-gear servo motor

Abstract

The invention discloses a ball screw executing mechanism driven by an electric automobile parking P-gear servo motor. The ball screw executing mechanism comprises a cylinder cover, wherein a ratchet wheel, a pawl and a transmission assembly are arranged in the cylinder cover; the rotatable pawl is returned through a torsion spring; the transmission assembly is connected with a P-gear servo motor; the engagement and the separation of the front end of the pawl and the ratchet wheel are realized through the transmission assembly; the transmission assembly consists of a ball screw, a guide nut, a compression spring, a bevel driving sleeve and a guide sleeve; the compression spring, the bevel driving sleeve and the guide sleeve can be pushed by the guide nut to axially slide along the ball screw; when the bevel driving sleeve and the tail end of the pawl are self-locked through a bevel fit manner, the front end of the pawl and the ratchet wheel are meshed; and after the bevel driving sleeve is separated from the tail end of the pawl, the separation of the front end of the pawl and the ratchet wheel is realized. The ball screw executing mechanism disclosed by the invention has the advantages that the mechanical structure is simple and reliable; the mechanical transmission route is short and convenient to use; the ball screw executing mechanism has a good braking and self-locking effect for an electric automobile; the parking reliability of the electric automobile can be greatly improved; and intelligent control is realized.

Description

technical field [0001] The invention relates to the parking field of an electric vehicle reducer, in particular to a ball screw actuator driven by a P-level servo motor for parking an electric vehicle. Background technique [0002] In recent years, with the development and progress of industrial society, the environment we live in has become more and more polluted. The air, water source, and soil are all polluted to varying degrees, especially the air pollution is particularly serious, leading to the development of new energy vehicles (electric vehicles) has become an inevitable trend. [0003] More electric vehicles are driven by motors, and the handbrake structure in the original P gear parking structure is no longer suitable. It is more hoped that the new mechanism of electric direct control can be used to intelligently control the sequence of parking action in P gear. At the same time, in order to ensure safety, a new structure of double slope self-locking is adopted. ...

AI Technical Summary

Problems solved by technology

[0003] More electric vehicles are driven by electric motors, and the handbrake structure in the original P gear parking structure is no longer suitable.

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