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    • 8. 发明授权
    • Device for indicating wear on a motor brush
    • 用于指示电动机刷上的磨损的装置
    • US5753995A
    • 1998-05-19
    • US753669
    • 1996-11-27
    • Kazutoshi Ogino
    • Kazutoshi Ogino
    • H01R39/38H01R39/58H02K13/00
    • H01R39/58
    • To inform a user of wear on a carbon brush for a motor earlier than when the carbon brush is actually required to be replaced with a new brush. In a motor brush wear indicating device, a metal terminal is attached to a brush holder, being opposed to the inside of a holder shank of the brush holder, and an indicator is operated when the metal terminal contacts a brush spring. The metal terminal has a contact in the middle of a length of the brush holder. The indicator can be operated while the carbon brush is continuously pressed against a commutator by the brush spring. The metal terminal serves as a leaf spring. When the carbon brush is worn and shortened, the indicator is operated. Even after the indicator operates, the carbon brush is still pressed against the commutator by the brush spring. Therefore, the user can operate a motor-driven tool for some time before the carbon brush must be replaced with a new one.
    • 为了在碳刷上实际需要用新的刷子更换之前,向用户通知用于电动机的碳刷上的磨损。 在电动刷磨损指示装置中,将金属端子安装到电刷架上,与电刷架的保持器柄的内侧相对,并且当金属端子接触刷子弹簧时,指示器被操作。 金属端子在电刷架的长度的中间具有接触。 当碳刷通过刷子弹簧连续地压靠在换向器上时,可以操作指示器。 金属端子用作板簧。 当碳刷被磨损和缩短时,指示器就被操作。 即使在指示器操作之后,碳刷仍然被刷子弹簧压靠在换向器上。 因此,用户可以在电刷驱动工具一段时间后才能更换新的碳刷。