| 摘要 |
<p>A differential mechanism has two output cam members (16, 17) rotatable about an axis X-X, each output cam member having a single frustoconical cam surface (22, 23) of undulating form comprising pairs of mutually inclined surfaces (24, 25:26, 27). Cam followers (28) having end surfaces (29, 30:32, 33) which engage the cam surfaces (22, 23) of the output cam members, so that relative rotation of said output cam members (16, 17) causes the cam followers (28) to slide axially. An input member (11) slidably supports the followers (28) and moves the followers circumferentially relative to the output cam members (22, 23). A first friction surface (16c) is operatively associated with at least one output cam member (16, 17) and inclined at an acute angle W to a plane normal to the axis of rotation X-X of the output cam members. A second similarly inclined friction surface (13c) is operatively associated with the input member (11, 13, 14). The first and second friction surfaces (16c, 13c) frictionally engage each other and generate a frictional torque FT which modifies the ratio of the torque output from the output cam members (16, 17) when relative rotation occurs between the output cam members.</p> |
