| 摘要 |
<p>A self-energising disc brake comprises a housing (1) in which @able friction discs having friction linings are located, the discs being brought into engagement with opposed surfaces in the housing by pressure plate (2, 3) located between the discs, application of the brake being initiated by radial movement of a pull-rod (13) which acts through a brake-applying mechanism (6) connected to lugs (9, 10) on the plates (2, 3) to move the plates angularly. Known brake-applying mechanisms have links pivotally connected to the lugs (9, 10) with the pull-rod (13) connected to the inner ends of the links. In order to overcome the disadvantages of the mechanical advantage decreasing with wear of the linings, the brake-applying mechanism (6) has a pair of links (7, 8), one end of each being connected to a a respective lug (9, 10), a fixed pivot (23, 24) in the housing, and a lever assembly (17) carried from the fixed pivot. The lever assembly (17) is movable angularly about the fixed pivot and also is able to move bodily with respect to the fixed pivot circumferentially of the brake, the assembly (17) having a pivotal connection (12) with the pull-rod (13) and pivotal connections (25, 26, 32) to each of the links (7, 8).</p> |
