| 摘要 |
PROBLEM TO BE SOLVED: To reduce electric resistance in mutual connection without increasing the mechanical friction in mechanical sliding between members such as a blush and a slip ring of an electric motor. SOLUTION: A slide contact surface a4 at the end surface of a cylindrical sintered body a3 as a slide contact A slidably contacts the slide contact receiving surface b3 of a copper disc b2 rotating relatively. On the outer jacket a1 of the sintered body a3, the density of conductive member is higher than that of a core a2. In the core a2 of the sintered body a3, the density of a solid lubricant is higher than that of the outer jacket a1. Because the current between the slide contact surface a4 and the slide contact receiving surface b3 concentrates on the outer jacket a1, mutual electric resistance is reduced. The decrease of the friction factor by a solid lubricat is not lost at a core portion a2. |
