| 摘要 |
A supplementary braking thrust unit for brake comprises a thruster (1); a thrusting rod (7) of the thruster (1) acts on the braking part (9). Said supplementary braking thrust unit for brake also comprises a supplementary braking mechanism which acts on the braking arms (10) so as to achieve supplementary braking, wherein said supplementary braking mechanism is a first supplementary braking mechanism (11a), said first supplementary braking mechanism further comprising: a sleeve (18), an inner end of the thrust rod (13) and the supplementary braking member (12) and the supplementary braking member (12) being a spring member; and an electromagnetic device (14) for storing/releasing energy to/from the supplementary braking member (12), the electromagnetic device (14) comprising an electromagnetic coil and an attraction block (17). |
