| 摘要 |
<p>1467566 Bearings GENERAL MOTORS CORP 30 July 1975 [14 Aug 1974] 31869/75 Heading F2A A rotary mechanism comprises a hub 16 rotatably supported on a spindle 10 by spacedapart bearings 12, 14, a washer 17 keyed to and slidably positioned on the spindle for abutment against the inner race of the bearing 14, and a self-adjusting nut assembly 20 for preloading the bearings; said assembly comprises a cam element 22 in the form of a collar slidably and rotatably mounted on the spindle with axially extending cam surfaces 35 on one side thereof, a nut 21 threadedly engaged on the spindle and having cam surfaces 33 which co-operate with the surfaces 35, a spring 23 tending to turn the element 22 with respect to the nut 21 in an upcam-ramp direction, and a key 42 interconnecting the spindle and the nut to prevent rotation therebetween, the nut having an annular outer surface which provides a secondary bearing for the hub 16. One end of the spring is attached in an aperture 36 of the nut 21, and the other is inserted in a notch 37 on a flange ring 24 press fitted to the element 22. The mechanism is assembled by screwing the nut 21 on to the spindle until a radial flange 26 abuts the end of the spindle, and backing the nut sufficiently for the key 42 and a locking pin 43 to be inserted. The spring and cam arrangement then supplies the required preload to the bearings. Upset portions 38 on the nut 21 axially retain the other components of the nut assembly.</p> |
