| 摘要 |
One race (25) of a release bearing (21) of a friction clutch release mechanism acts on the fingers (19) of a diaphragm spring (14) and the other race (27) is mounted on a bush (28) which surrounds a fixed sleeve (23) of nonmagnetic material with a clearance (29) therebetween. The bush (28) has a radial flange which affords an armature for cooperation with a permanent magnet (32) carried by a carrier (22) which is slidably mounted on the sleeve (23). The permanent magnet (32) may be a ring magnet or a circumferentially spaced array of separate magnets and the face of the or each magnet may be flush with the surrounding face of the carrier. In use of the friction clutch release mechanism, if the clutch and the fixed guide are not coaxial, the permanent magnet (32) permits the release bearing (21) to move radially relative to the carrier (22) into a position in which it is concentric with the clutch, and holds the release bearing (21) concentric with the clutch.
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