Gear box shifting fork

Abstract

The invention discloses a gear box shifting fork, which comprises shifting fork supporting shafts at two ends and an arched shifting fork body, wherein the arched shifting fork body is used for connecting the shifting fork supporting shafts at the two ends; the two ends of the arched shifting fork body extend downwards out of lower laps perpendicular to the shift forking supporting shafts respectively; a pair of shifting fork block end faces are arranged inside the two ends of the arched shifting fork body respectively; shifting fork blocks are roller needle bearings; the roller needle bearings are hinged with one ends of the supporting shafts; and the other ends of the supporting shafts penetrate through the lower laps to be fixed on the lower laps through nuts. The gear box shifting fork has the advantages of simple structure, convenience in machining and assembly, extremely small friction loss of the roller needle bearings and an annular groove of a dual gear and capability of prolonging the service life of the dual gear. The roller needle bearing is low in purchasing cost, good in accuracy, high in hardness and convenient to maintain and replace, so that the reliability of a gear box is obviously improved.

Description

technical field [0001] The invention relates to a shift mechanism or a clutch mechanism of a gearbox, in particular to a shift fork of a gearbox, belonging to the technical field of mechanical transmission. Background technique [0002] The shift fork is the key part of the gearbox. When the operating handle is pushed, the shift fork connected to one end of the operating handle pushes the sliding gear in the gearbox to move axially, and after disengaging the meshing system of the original gear pair, it meshes with another gear to establish A new gear pair meshing relationship to obtain the required transmission ratio; it can also realize the engagement or separation of the sliding gear and the clutch gear. Existing gearbox shift forks such as figure 1 As shown, it includes a shift fork support shaft 1 at both ends, a bow-shaped shift fork body 2 connecting the shift fork support shafts 1 at both ends, and a pair of rectangular shift fork blocks 3 are respectively arranged...

AI Technical Summary

Problems solved by technology

Due to the frequent operation of the fork, after long-term use, the two sides of the rectangular fork block 3 and the annular groove ring surface of the double gear are subject to greater wear due to frequent sliding friction, resulting in the two sides of the rectangular fork block 3 and the ring of the double gear. The groove needs to be replaced due to excessive wear, which affects work efficiency

In order to ensure the flexible rotation of the rectangular fork block 3 and reduce the wear of the inner hole of the fork block 3, and the surface roughness of the inner hole of the fork block 3 is required to be above 0.8, the quenched fork block 3 needs to be hinged twice. Holes and polishing increase the manufacturing cost of the shift fork block 3

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