Patent ID: 7073640

Claim:
A brake structure of a traction machine, said brake structure comprising: a housing; a brake drum which is made rotatable about a shaft disposed on a rotary axis of the traction machine; and an electromagnetic brake unit built in an inner space of the brake drum for braking the rotating brake drum, the electromagnetic brake unit including: a plurality of movable iron cores; a plurality of brake shoes located on the outside of the individual movable iron cores and joined thereto by connecting members, the brake shoes having curved outer surfaces positioned face to face with a curved inner surface of the brake drum; a one-piece formed stationary iron core block having a plurality of stationary iron core portions joined to the individual movable iron cores via compression springs for forcing the individual brake shoes outward against the curved inner surface of the brake drum via the movable iron cores and the connecting members; and guiding parts disposed on an inside surface of the housing and extend along the curved inner surface of the brake drum, the guiding parts having end surfaces which face circumferential end surfaces of the brake shoes.