SURFACE PROFILE OF WHEEL RIM OF FREIGHT CARS Russian patent published in 2018 - IPC B60B17/00 B61F13/00 

FIELD: transportation.

SUBSTANCE: invention relates to railway transport and can be used in the manufacture and repair of freight car wheels. Surface profile of the rim of the railway wheel, which includes the conjugate profiles of the ridge and rolling surface, is made in the form of a line consisting of conjugate segments of straight lines and arcs of circles. Profile is made for railway wheels of freight cars with a rim width T=130 mm and an inclination angle of the ridge working surface 70°. Profile of the inner surface of the ridge contains an arc R₁=45 mm, conjugate to the arc R₂=15 mm, forming the crest of the ridge at a height of S=28 mm at the interface with the working surface of the ridge formed by the arc R₃=13 mm and a straight line conjugate with it with an angle of inclination of 70° to the horizontal, which is further conjugate with the rolling surface of the wheel along the filleted corner circumscribed by the arc R₄=14.3 mm. Rolling surface is formed by successively conjugate arcs R₅=80 mm, R₆=300 mm, R₇=1,000 mm, R₈=80 mm and a straight segment with a slope of 1/5.

EFFECT: reduction of wear of the ridge and contact fatigue damage, uniform wear of the rolling surface and the crest of the wheel.

4 cl, 4 dwg, 1 tbl