| 摘要 |
PURPOSE:To prevent the slack of a mount of each part in the end of a rotor shaft of the side provided with a brake disc by interposing an elastic member between the shaft and a bearing, thereby absorbing and alleviating large impact force which is produced when the brake disc is attracted. CONSTITUTION:An attracting unit 1a which is buried with a rod 3 made of many magnetic materials radially at the outer periphery of a disc 2 made of nonmagnetic material is mounted together with a rotor 5a on a rotor shaft 6, and disposed in the space formed between the inner surface of a stator 4 and the rear surface of the rotor 5a. A brake disc 12a which has a magnetic material on the opposed surface to the unit 1 and is formed with a brake retainer 18a on the rear surface is slidably mounted on the shaft 6, and a brake spring 24 is arranged between the unit 1 and the disc 12a. An elastic member 18 made of a leaf spring is interposed, for example, between the engaging ring 17 of a rear bearing 17 and a washer 19a of an engaging member 19 of the bearing, and an impact force which is produced when the disc 12a is attracted is absorbed to an elastic member 28 through the engaging part 19 of the shaft 6 to the bearing 17. |
