Easily mounted-dismounted shifting fork pin inner surface machining tool

Abstract

The invention discloses an easily mounted-dismounted shifting fork pin inner surface machining tool which comprises a shifting fork head hole positioning pin and two spring positioning pins, wherein the shifting fork head hole positioning pin and the two spring positioning pins are installed on a numerical control lathe chuck flange; the shifting fork head hole positioning pin is arranged on the numerical control lathe chuck flange and is matched with a to-be-machined shifting head hole; the two spring positioning pins are symmetrically arranged in the numerical control lathe chuck flange, and form a isosceles triangle shape together with the shifting fork head hole positioning pin; each spring positioning pin is internally provided with a spring; the numerical control lathe chuck flange is provided with shifting fork pin baffle blocks clamped on the positioning pins; inner end surfaces of the shifting fork pin baffle blocks are matched with the to-be-machined shifting fork pin outer end arc surfaces; and pressing plates connected with the upper ends of the springs are arranged at the upper parts of the shifting fork pin baffle blocks. According to the invention, the tool setting step is saved, and the workpiece machining accuracy is improved; and during the mounting and dismounting processes of shifting forks, because the fixing force of the pressing plates is from the springs, the easily mounted-dismounted shifting fork pin inner surface machining tool is convenient to mount and dismount, thus the working time is saved, the efficiency is improved, and the operation is convenient.

Description

technical field [0001] The invention relates to a tool, in particular to a tool for processing the inner surface of a shift fork leg which is easy to disassemble. Background technique [0002] At present, the shift fork is located in the gearbox of the car, mainly for shifting gears and controlling the speed of the vehicle. In the gearbox shifting mechanism, the shift fork shaft hole is installed on the shift fork shaft; the shift fork foot is clamped in the groove of the double-link shifting gear. When the speed needs to be changed, by manipulating the gear shift lever, the shift fork pin moves the double-link shift gear and slides on the spline to change the gear position. Constantly changing the gear position requires the two ends of the fork foot to be able to withstand impact loads and have strong wear resistance during work. Therefore, the surface of the shift fork requires high-frequency quenching treatment, and the hardness is 48-58HRC; both ends of the shift fork ...

AI Technical Summary

Problems solved by technology

However, although the diameter of the inner surface of the gear shift fork foot of the transmission is large, the processing surface is small, and because the shift fork is a very irregular part, it is difficult and time-consuming to install the card.

In this way, milling and drilling are used to process the work with low efficiency, high cost, and the clamping tooling of the shift fork on the milling machine and drilling machine is complicated.

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