Patent ID: 11892046
Assignee: BEXUS INDUSTRIES CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  A | IPC A  F

Claim 0:
1. An internal drum brake anti-falling device, comprising:
a carrier, having an accommodating chamber defined therein;
a rotating drum comprising a life belt coiled thereon;
a main shaft, arranged across said accommodating chamber for supporting said rotating drum to autorotate;
a brake unit, arranged at an end of said rotating drum; and
a drum brake module, comprising a base detachably mounted in said accommodating chamber and a passive ring mounted on said base, wherein an outer diameter of said base defines a first ring surface configured in a concentric circle manner to said main shaft and an inner diameter of said passive ring defines a second ring surface, wherein the externally toothed ratchet teeth are arranged on the external surface of the passive ring opposite of the inner diameter of the passive ring defining the second ring surface to allow said second ring surface and said first ring surface to be disposed opposite to and closely fitting to each other so as to control said first ring surface and said second ring surface to sequentially generate maximum static friction force and kinetic friction force therebetween, when said life belt drives said brake unit buckling with said ratchet teeth to interact with an auto-rotation of said passive ring, thereby decelerating said passive ring, so as to buffer a falling speed of said life belt, wherein said base has a slit radially arranged thereon and comprises at least a check bolt crossing said slit, allowing said check bolt to rotate to adjust a width of said slit in order to change a diameter of said first ring surface for adjusting the maximum static friction force.