Bearing unit for railway carriages

Abstract

Emergence of fretting worn powder is to be suppressed, and intrusion of the worn powder that has emerged into an internal area of the bearing. A ring spacer (20) is interposed between an end face (M2) of an inner race (3) of the bearing (2) to be mounted on a wheel axle, and an end face (N2) of a rear cover (11) (ring member) to be mounted on the wheel axle (1) for axial positioning of the inner race (3) with respect to the wheel axle (1). An elastic seal ring (21) is integrally fixed to an outer periphery of the ring spacer (20). The elastic seal ring (21) is elastically fitted to an outer circumference of a recessed stepped portion (25) formed on the end face of the rear cover (11). The elastic seal ring (21) is thus pressed against the opposing end faces of the inner race (3) and the rear cover (11). Inside the elastic seal ring (21), a storage space for the worn powder is provided.

Description

Technical field [0001] The present invention relates to a bearing device that uses rolling bearings to support the axles of railway vehicles. Background technique [0002] The axle bearing device of a railway vehicle includes a rolling bearing mounted on the axle, and a set of ring members before and after the roller bearing is mounted on the axle to perform axial positioning of the inner wheel of the rolling bearing. The ring parts are the back cover abutting on the rear width of the inner wheel and the oil interception ring abutting on the front width, or the back cover and the front cover abutting on the front and rear sides of the inner wheel, and are made of heat-treated carbon Steel composition. [0003] Figure 5 Shows a general bearing device for railway vehicles. In the bearing device, a set of ring members of the rear cover 11 and the oil interceptor 12 abut against the two ends of the inner wheel 3 of the rolling bearing 2 mounted on the axle 1. The rolling bearing 2 ...

AI Technical Summary

Problems solved by technology

[0009] Image 6 The bearing device for railway vehicles is effective in suppressing the wear of the inner wheel 3 and the rear cover 11 by the partition plate 32 and reducing the generation of fretting wear powder. However, if the generated trace amount of wear powder accumulates, it will flow out to the bearing. Internally, problems such as deterioration of the lubricant inside the bearing occur, and it is difficult to suppress the occurrence of this problem

[0010] exist Figure 7 In the bearing device, although the elastic member 33 can suppress the fretting wear powder from the contact part X of the inner wheel 3 and the rear cover 11 to the bearing, the defects caused by the generation of wear powder and the accumulation of the wear powder at the contact part X still exist.

[0011] From the above, it can be considered that the Image 6 the clapboard with Figure 7 In this case, the number of components increases, the number of assembly man-hours for the entire bearing device increases, and the manufacturing and assembly of the bearing device becomes more difficult.

Images