Braking device

Abstract

A braking device capable of effectively causing a shearing stress of a magnetorheological fluid to act on both surfaces of the rotation body is provided. The present invention provides a braking device including a first soft magnetic material 1, a coil 3 attached to the first soft magnetic material 1, a second soft magnetic material 2, a activation chamber 4 formed between the first soft magnetic material 1 and the second soft magnetic material 2, and a rotation body 5 provided inside of the activation chamber 4, and a magnetorheological fluid 6 filling a gap between the rotation body 5 and the first soft magnetic material 1 and a gap between the rotation body 5 and the second soft magnetic material 2, wherein the rotation body 5 includes low magnetoresistive parts 5a, 5b made of a soft magnetic material and a high magnetoresistive part 5c in which a magnetic flux is less likely to flow, and the high magnetoresistive part 5c is provided at a portion of the rotation body 5 facing the coil 3.

Dependencies are inferred from the claim text.