Rail traffic vehicle gear box

Abstract

A rail traffic vehicle gear box comprises a driving shaft, a middle shaft, a driven shaft and a box body. The box body is composed of an upper box body and a lower box body. The combination face of the upper box body and the lower box body pass through the axis of the middle shaft and the axis of the driven shaft. The driving shaft is located in the upper box body, a bearing seat is respectively installed on the box body at the positions corresponding to two ends of the driving shaft, two ends of the middle shaft and two ends of the driven shaft, and a tapered roller bearing is installed in each bearing seat to form three pairs of tapered roller bearings. Each pair of tapered roller bearings is arranged in face-to-face mode. The driving shaft, the middle shaft and the driven shaft are supported by one pair of tapered roller bearing respectively. A bearing seat at one end of a gear of the middle shaft is a II hole bearing seat provided with a center hole for a bearing play measuring tool to pass, and a screw hole connected with the bearing play measuring tool is arranged on the end face of one end of the gear of the middle shaft. The rail traffic vehicle gear box is convenient to install and maintain. Axial play measurement and adjustment of the bearings are convenient.

Description

technical field [0001] The invention relates to a gear box of a rail transit vehicle. Background technique [0002] In rail transit vehicles, the traction motor transmits power to the wheels through the gearbox to drive the vehicle. The traditional rail transit gearbox adopts a vertically split casting box, and the vertically split box must be retracted during the maintenance process, which may easily cause damage to parts and increase additional maintenance costs. The gearbox split up and down is convenient for the maintenance of the gearbox. The utility model of China Authorized Notice No. CN 201126006Y discloses a rail transit gearbox, which is a gearbox split up and down. The box body, its input gear shaft, intermediate gear shaft and output shaft are supported in parallel in the box body, an intermediate gear is fixed on the intermediate gear shaft, and an output gear is arranged on the output shaft; the input gear shaft adopts cylindrical roller bearings and The fou...

AI Technical Summary

Problems solved by technology

The drive gear shaft of the existing upper and lower split gear box is supported by a combination of double bearings, which occupies a large axial space and is not conducive to the assembly of other components, and the axial clearance of the bearing supporting the intermediate gear shaft must be measured and verified by multiple channels. After the calculation, the grinding shims are adjusted one by one, which not only increases the measurement error, but also brings great inconvenience to assembly and production

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