Patent ID: 8448758

Claim:
A supplementary braking thrust apparatus for a brake, comprising a thruster, a push lever of the thruster acting on a brake arm in a brake unit, characterized in that, the supplementary braking thrust apparatus of said brake further comprises a supplementary braking mechanism, and the supplementary braking mechanism acts on the brake arm to realize supplementary braking; said supplementary braking mechanism comprising a supplementary braking rod and a supplementary braking member, wherein said supplementary braking member releases energy stored therein, and said supplementary braking rod exerts a force on the brake arm to realize supplementary braking; said supplementary braking rod is a telescopic thrust rod which exerts said force on the brake arm to realize supplementary braking when said supplementary braking member releases energy; and said supplementary braking mechanism is a first supplementary braking mechanism, said first supplementary braking mechanism further comprising: a sleeve, an inner end of the thrust rod and the supplementary braking member being provided within the sleeve, the thrust rod being hinge-connected with a thrust arm via the outer end of the thrust rod to act on the brake arm in the brake unit, and the supplementary braking member being a spring member; and an electromagnetic device for storing or releasing energy to or from the supplementary braking member, the electromagnetic device comprising an electromagnetic coil and an attraction block, the electromagnetic coil of the electromagnetic device being connected with the sleeve, the inner end of the thrust rod passing through the spring-type supplementary braking member and the electromagnetic device, the thrust rod being provided on the inner end thereof with a slide block slidable along the thrust rod, the supplementary braking member being provided between an end cover of the sleeve and the slide block with the two ends thereof acting on the sleeve and the slide block, respectively, the thrust rod being provided at the inner end thereof with a limit block for the attraction block, the attraction block of the electromagnetic device being located between the electromagnetic coil and the limit block, a tube sleeve extending on the attraction block, the supplementary braking member acting on the attraction block via the slide block and the tube sleeve.