GB1359388A - Wheel bodies - Google Patents

Abstract

1359388 Brake discs for rail-vehicle wheels KNORR-BREMSE GmbH 3 July 1972 [3 July 1971] 31121/72 Heading F2E Two half-rings 10, 11, Fig. 1, constitute a brake ring 6 arranged on one lateral face of a wheel web 2, Fig. 3, each half-ring being retained by at least three bolts parallel to, and distributed around, the wheel axis, there being for each half-ring a number of guide parts which must fulfil the following requirements: (a) number not more than three; (b) number at least two less than the number of bolts retaining the half-ring; (c) engage in apertures in wheel-web and half-ring so as to inhibit relative radical displacement of them at the guide-part locations, and be parallel to the wheel axis; (d) be symmetrical relative to plane 23 containing the wheel axis and bisecting the halfring; (e) be no further from that plane than any of the bolts retaining the half-ring. Also, the bolts that are further from the plane 23 must engage between wheel web and half-ring with radical clearance. In Figs. 1, 3, each half-ring has four retaining bolts 12 to 15, the shanks of bolts 12, 15, extending with radial clearance (permitting thermal relative movement) through bores in web and half-ring (Fig. 2, not shown), while around each bolt 13 or 14 is located a guide part in the form of a cylindrical clamping sleeve 26 which has no radical clearance through bores 27, 28, 29. But in an alternative not accompanied by a drawing the guide parts for each half ring may be simply the shanks of certain retaining bolts having no radical clearance in the web and half ring bores; ribs 30 may be provided. Two further half rings form a further brake ring 7 on the opposite web. In Fig. 4, each half-ring has a single guide part in the form of a clamping sleeve 26<SP>1</SP> without a bolt, and four retaining bolts. Tilting of the half-ring about sleeve 26<SP>1</SP> is prevented by connecting the two half-rings together at 32. In vehicles for which braking operations to bring the vehicle to a halt, rather than retarding it, predominate, the cooling ribs 30 may be omitted and the half rings bear against the adjacent wheel faces so that the body of the wheel itself takes up and subsequently dissipates the heat.