| 摘要 |
PURPOSE:To accomplish simplification in working and assembly as well as miniaturization by housing a piston for pushing a pad and a piston into the cylinder chamber for generating hydraulic pressure. CONSTITUTION:With the operation of a lever 24, a piston 14 is turned so that a ball 25 and a cam surface 16 combine to push the piston 14 forward. The resulting hydraulic pressure drives a first piston 14 to push a pad 15 against a disc D. When the piston 14 is in the most retracted position, i.e., out of braking, a working rod 27 pushes the tip of a valve rod 33 inclined, whereby a reservoir 18 is communicated to a cylinder chamber 12 to compensate for the deficiency in oil due to abrasion of the pad or the like. In braking time, the pressure is withdrawn from the rod 27 so that the rod 33 returns to the vertical position to prevent reverse flow of the oil to the reservoir 18. |
