Dispositif d'accouplement

摘要

1,058,489. Frictionclutches and brakes. V. WASSILIEFF. April 28, 1964 [May 2, 1963], No. 17529/64. Headings F2C and F2E. In a jamming-ball one- or two-way friction clutch, brake or rotary element locking means comprising co-axial driving (driven) and driven (driving) clutch, or fixed and rotatable brake or lock, members 2, 14, balls 20 rotationally fast with the member 2 are radially cammed by a loose, tapered element 6 into engagement with wedge surfaces of segments engageable with a cylindrical surface of the member 14. The taper of the element 6 may be linear or curved. In Fig. 1 the balls caged in the member 2 engage bi-directional wedge surfaces in semicircular segments 58 which are urged radially inwards by a garter spring 62 and are outwardly frictionally engageable with the member 14. The element 6 is retractable against a spring 32 by a push-rod 60 coaxially disposed in the member 14. In Fig. 3 (not shown), a double clutch, e.g. providing wash-to-dry gear change in a washing machine, comprises two sets of balls 20 1 , 20 2 caged in a driving member 2 and selectively radially cammed by a double tapered element 611 into engagement with bi-directional wedge surfaced segments 58 1 , 58 2 frictionally engageable with two driven members 14 1 , 14 2 . The element 6 is axially moved against a spring 32 by a push-rod 61. In Fig. 4 (not shown) means locking an angularly adjustable element, e.g. in a vehicle seat and back-rest adjustment, comprises balls 201 caged in a fixed member 21 and radially cammed by an element 61 into engagement with bi-directional wedge surfaced segments 58 frictionally engageable with a ring 141. The latter is resiliently deformable and is secured to inwardly extending lugs 68 welded to a rotatable member 101. The element 61 is axially retracted, e.g. for back-rest adjustment, by a thumb-screw 70. In the one-way clutch of Fig. 5 (not shown), the axially movable element is internally tapered to inwardly radially cam the balls into engagement with uni-directional wedge surfaces of segments inwardly frictionally engaging the driven member.