| 摘要 |
<p>A diaphragm clutch mechanism for a motor vehicle has a diaphragm spring which rocks between a primary fulcrum support provided on the cover and a secondary fulcrum support retained by fastening structure which fastens the diaphragm to the cover for rocking movement with respect thereto. The fastening structure comprises lugs extending from the cover, each having an axial portion passing through openings in the diaphragm, and an outwardly turned radial portion, these portions defining between them a wedging bend. An annular support ring forms (directly or indirectly) the secondary fulcrum support and this is wedged in position against the wedging bend by thrust tabs provided on the cover or the support ring which are applied against a wedging zone that is spaced from the primary and secondary supports to pre-stress the support ring by an amount which is greater than the declutching force. The primary and secondary supports are spaced apart a distance greater than the thickness of the diaphragm, whereby a clearance is provided between the fulcrum supports and the diaphragm so that the diaphragm is not gripped by the supports. Clamping friction is thereby avoided.</p> |
