Reduction gear box

Abstract

The invention relates to a reduction gear box, belonging to the technical field of railway vehicle traction gear drive device. The gear box comprises a box body, wherein the outside of the box body is provided with a great gear axle hole; the whole great gear axle hole appears like stairs, the aperture of the inner section is larger than that of the outer section; the inner section and outer section are separately provided with at least two sealing grooves which combines the corresponding structure of the great gear axle to form a sealed maze; the box body is arranged on the lower part of thegreat gear axle hole to form a pit which inclines upward and faces the box body, the deepest position of the pit reaches the lower part of the outermost sealing groove of the great gear axle hole; and the lower parts of the sealing grooves are provided separately with at least one vertical hole which is communicated with the pit. Therefore, lubricating oil which flows in the sealing grooves can flow in the inclined pit by timely and smoothly passing through the vertical hole and then flow back in the box body, thus not affecting the tightness of the sealing grooves; in addition, the inclined pit can be formed by casting when the box body is shaped, and the vertical hole can be drilled by directly using a drill arm in the great gear axle hole without tooling, thus the drilling is very convenient. The reduction gear box is applicable to the light rail subway and the railway vehicle with a speed of less than 160Km / h.

Description

technical field [0001] The invention relates to a reduction gear box, in particular to an improvement of the oil return structure of the gear box, and belongs to the technical field of traction gear drive devices for railway vehicles. Mainly used for subway, light rail and railway vehicles with a speed below 160Km / h. Background technique [0002] The reduction gearbox is a key part of the traction gear drive of the railway vehicle, and its quality directly affects the operation status and life of the reducer. During the operation of the train, the lubricating oil will slowly permeate outside the reduction box along the rotating axle shaft, and at the same time, the lubricating oil will accumulate in the sealed labyrinth. If the lubricating oil cannot flow back into the reduction box in time, it will gradually leak. In the end, the bearings and gears inside the gearbox will be damaged due to lack of lubricating oil. This is obviously absolutely not allowed. [0003] For a ...

AI Technical Summary

Problems solved by technology

Since it is necessary to process several grooves on the circumferential surface of the gear box hole, and then process the holes in the axial direction of the grooves that pass through these grooves and are inclined to the gear box body, the processing is difficult, and special tooling is required to process these through holes. trench hole

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