GB190228739A - Improvements in Ball Bearings for the Axle-trucks of Cars - Google Patents

Abstract

28,739. Norwood, J. E. Dec. 30. Axle-trucks or undercarriages.-Relates to centre and side ball bearings for axle-trucks, especially for motor tramcars, in which there is a tendency for the truck to pull out from under the car body. The centre bearing consists of a ring of balls mounted in the upper and lower races 66, 55. The body and truck bolsters have opposite downwardly and upwardly extending flanges 64, 51 respectively, which embrace the balls 57 and lock the two bolsters when there is relative horizontal motion between them. The hollow king-pin 71 has radial projections 72. It is inserted by passing these projections between lugs 61, 69 in the bolsters, and is then rotated through 90‹ so that it cannot be withdrawn. The side bearings comprise endless ball races, one portion 19 of which is above and curved reversely to the remaining portion. The balls are passed through a hole 22, and those running on the operative portion 19 of the race project through the slot 24 so as to engage with the recessed ring 45 on the body bolster 44. The casing 10 which contains the race 19, is supported on springs 41 and moves within the truck bolster 43, and holes 34 are provided to permit the escape of dirt.