Double-cab tractor gear shift mechanism

Abstract

The invention relates to a gear shift mechanism for a two-cab tractor, which comprises a hydraulic directional valve for controlling the operating state of a gear box clutch, a reversing control lever for controlling switching over of the hydraulic directional valve, and a first gear operating lever and a second gear operating lever arranged in two cabs respectively, wherein the reversing control lever is connected with the first gear operating lever and the second gear operating lever through a link mechanism and a transfer mechanism. The gear shift mechanism is characterized in that the transfer mechanism consists of a reversing shaft, a first driving deflector rod, a second driving deflector rod, a driven deflector rod and deflector rod locking pieces; the locking pieces are arranged beside the first and the second driving deflector rods respectively; when the first driving deflector rod is locked by the locking piece, the second driving deflector rod is unlocked; when the second driving deflector rod is locked by the locking piece, the first driving deflector rod is unlocked; and the operating states of the two locking pieces and the rotation positions of axial grooves of a first annular shifting groove and a second annular shifting groove are synchronously controlled by a first gear operating lever and a second gear operating lever through a third link mechanism respectively. The gear shift mechanism has the advantages of simple structure and reliable operation; and particularly, the transfer mechanism can achieve that when one cab works, the gear operating lever of the other cab is locked so that the gear shift mechanisms of the two cabs have self-locking function to effectively avoid accidents caused by the misoperation of the gear shift mechanism by a person in the other cab when the two-cab tractor puts into practical use.

Description

technical field [0001] The invention relates to mining machinery, in particular to a shift mechanism for a tractor with double cabs used in small and medium coal mines. Background technique [0002] At present, the double-cab tractors used in small and medium-sized coal mines in China adopt mechanical structures for their forward and backward shift mechanisms. Each cab has a set of shift mechanisms to control the clutches in the gearbox respectively to realize the forward movement of the tractor. or back. Since the shifting mechanisms of the two cabs do not have a self-locking function, the personnel in the other cab can easily misoperate the shifting mechanism during actual use, causing accidents. Contents of the invention [0003] The purpose of the present invention is in order to solve the deficiency that above-mentioned background technology exists, proposes a kind of simple in structure, reliable in operation, the shift mechanism of double-cab tractor with self-lock...

AI Technical Summary

Problems solved by technology

Since the shifting mechanisms of the two cabs do not have a self-locking function, it is easy for people in the other cab to misoperate the shifting mechanism in actual use, causing accidents

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