Gear case used for rail traffic vehicle

Abstract

The invention relates to a gear case used for a rail traffic vehicle, which comprises a case body, an output shaft and an input shaft, wherein the case body is respectively provided with an axle bearing pedestal and an input shaft bearing pedestal from front to back; the output shaft and the input shaft are connected by a gear; the joint portion of the shaft and the case body is provided with a labyrinth oil seal. The case body comprises an upper case body and a lower case body; a joint surface between the upper case body and the lower case body passes through the axial lead of the axle bearing pedestal; the joint surface is obliquely arranged; the end surface of the lower case body is provided with a safety nose; and the bottom end of the end surface of the lower case body is provided with a torsion bar connecting point. The original horizontal arrangement of the joint surface is changed into oblique arrangement, and thus, enough space can be reserved for the arrangement of a torsion bar. Meanwhile, the end surface of the lower case is provided with the safety nose. When the torsion bar on the gear case is broken, the normal operation of the gear case can be ensured by preventing the rotation of the gear case. Moreover, the bottom end of the end surface of the lower case body is provided with the torsion bar connecting point. The arrangement of the torsion bar can reduce the displacement errors of the centers of the input shaft and motor shaft of the gear case in operation.

Description

technical field [0001] The invention relates to a gear box structure, in particular to a gear box for rail transit vehicles. Background technique [0002] In the Chinese patent document whose application number is 200720039153.2, titled "High Speed ​​Axle Gearbox Box", a high-speed axle gearbox box body of a large-scale railway maintenance machine is introduced, which is fixedly connected by an upper box body and a lower box body. As a result, each bearing seat of the upper box and the lower box is divided into upper and lower halves by the joint surface, and the arcs at both ends of the upper box and the lower box are respectively concentric with the round holes of the corresponding bearing seats at both ends. Both the outer surfaces of the upper box and the lower box are provided with reinforcing ribs. In this technical solution, the joint surface of the box is arranged horizontally. Due to welding defects, residual welding stress, various vibrations and large temperature...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a gear box for rail transit vehicles, so as to facilitate disassembly, oil filling, oil level observation, reduce the shaft center displacement difference between the motor shaft and the gearbox input shaft, and solve the problem of the shaft coupling on the motor shaft. The problem of insufficient compensation for the axial center displacement difference with the input shaft of the gearbox, and under the condition of ensuring the normal operation of the lubricating oil, the oil seal in the gearbox occupies a small space, which meets the overall assembly requirements

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