公开(公告)号：EP1118790A3

公开(公告)日：2003-05-28

申请号：EP01300211.8

申请日：2001-01-11

申请人： Tokyo-Buhin Kogyo Co., Ltd.

发明人： Ohba, Mitsuyoshi, C/o Tokyo-Buhin Kogyo Co. Ltd. ,  Ishida, Toshiyuki, C/o Tokyo-Buhin Kogyo Co. Ltd. ,  Yoshida, Shin, C/o Tokyo-Buhin Kogyo Co. Ltd. ,  Kaneko, Junya, C/o Tokyo-Buhin Kogyo Co. Ltd.

IPC分类号： F16D65/22 ,  F16D66/02

CPC分类号： F16D65/22 ,  F16D65/183 ,  F16D65/56 ,  F16D65/568 ,  F16D66/025 ,  F16D2121/14 ,  F16D2125/32 ,  F16D2125/66

摘要： In the expander 50 in a drum brake, when the brake is activated, the sleeve 56 is extended in the lateral directions in the drawing by the wedge 52 inserted within the housing 51, and the shoe engaged with the clip 58 is swung to press the lining 23 against the drum, and friction braking is performed. When the lining 23 wears away and the amount of movement of the sleeve 56 increases, the sleeve 56 is rotated by reciprocal action with a drive ring 62 that is engaged with the periphery of the sleeve and, thereby, the pressing screw 57 screwed thereon comes out by the amount of the increase of movement (the amount of wear on the lining). A flat surface 56c is formed on the periphery of the sleeve and the detecting head 80 of the displacement detection apparatus detects the rotation of the sleeve 56. The controller performs a warning operation with the warning means when the cumulative number rotations of the sleeve 56 has reached a prescribed number of rotations.