Gear shifting mechanism special for automatic transmission

Abstract

The invention discloses a gear shifting mechanism special for an automatic transmission. The mechanism comprises a gear shifting guide shaft, a first bearing, a gear shifting worm-wheel shaft gear, a gear shifting guide shaft worm wheel, a second bearing and a torsional damper assembly. The torsional damper assembly comprises a damper left cover, a damper right cover and a torsional damper check ring which are arranged from left to right in sequence. At least three cylindrical helical springs which are evenly distributed into a circle are installed in installation cavities correspondingly formed in the damper right cover under pretightening force. The damper left cover and the torsional damper check ring are buckled together through buckles and clamping grooves. The outer diameter of each cylindrical helical spring is larger than the depth of a cavity body of each installation cavity, so that the cylindrical helical springs can be pressed by the side walls of left cavities and right cavities when the left cavities and the right cavities rotate relative to the installation cavities. When external teeth of the gear shifting worm-wheel shaft gear are abraded, automatic compensation of gaps caused by abrasion can be achieved, and gapless meshing between the gear shifting worm-wheel shaft gear and a gear shifting rod is achieved.

Description

technical field [0001] The invention relates to the technical field of transmissions, in particular to a shifting mechanism specially used for automatic transmissions. Background technique [0002] The transmission shifting mechanism usually consists of a shifting guide shaft, and a first bearing, a shifting worm shaft gear, a shifting guide shaft worm gear and a second bearing which are sequentially sleeved on the shifting guide shaft from left to right. The first bearing and the second bearing are press-fitted on the shift guide shaft, and are used for installation at both ends of the shift guide shaft. The worm gear of the shift guide shaft is fixedly set on the shift guide shaft. The worm gear of the shift guide shaft meshes with the right end of the shift worm shaft gear through internal and external teeth, thereby transmitting power to drive the shift worm shaft gear to rotate, and the shift worm shaft gear drives The shift lever moves, and the shift fork moves throug...

AI Technical Summary

Problems solved by technology

[0003] The main problem with this structure is that during use, the outer teeth of the shifting worm gear are prone to wear and tear. Once worn, the shifting worm gear needs to be replaced frequently to ensure normal shifting, and the cost of use is high. and very troublesome

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