| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the sense of brake operation by solving a gap between a piston seal and a seal groove in a disk brake. <P>SOLUTION: A seal groove 15 is formed on the inner circumferential surface of a cylinder bore 13 provided on a caliper body, a piston seal 16 having a rectangular section is fitted to the seal groove 15. A piston 17 is inserted to the cylinder bore 13, and the cylinder bore 13 and the piston 17 are sealed by the piston seal 16. The inclination of a bottom surface part 15A of the seal groove 16 to the axial direction of the cylinder bore 13 is set to 5°, and the angle between the bottom surface part 15A and a side surface part 15b is set to 87°. According to this, an outer circumferential surface 16A and a side surface 16B of the piston seal 16 can be closely fitted to the bottom surface part 15A and side surface part 15B of the seal groove 15 with the piston 17 being installed to the cylinder bore 13, and the gap between the both can be eliminated to improve the sense of brake operation. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
