Guide frame for eddy current type retarder device

摘要

A guide frame for an eddy current type reduction device comprises a brake drum connected to a rotary shaft, an immovable guide frame formed of a non-magnetic material disposed within the brake drum and connecting a number of ferromagnetic plates opposed to an inner peripheral surface of the brake drum in peripherally and equally spaced relation, and magnet support rings formed of a magnetic material disposed within the guide frame and fastening magnets opposed to the ferromagnetic plates, respectively. An outer peripheral surface and an inner peripheral surface of the ferromagnetic plates is displaced in an axial direction of the brake drum, and an axial center of the outer peripheral surface of the ferromagnetic plates is substantially coincided with an axial center of the brake drum. With this arrangement, a heat distribution generated in braking is made uniform, and a heat deformation of the brake drum is suppressed.