| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hydraulic master cylinder for vehicle capable of achieving slip-off of a piston with a simple structure.SOLUTION: A cylinder body 2 of a hydraulic master cylinder 1 comprises a cylinder hole 9 which is formed into a bottom cylindrical shape and into which a piston 8 is inserted. On an opening side of the cylinder hole 9, a slip-off member 10 for slip-off of the piston 8. The cylinder hole 9 comprises a small diameter hole 9a for storing the piston 8 movably and a slip-off member fitting hole 9b formed on the opening side of the small diameter hole 9a. The slip-off member fitting hole 9b has diameter larger than that of the small diameter hole 9a, and is formed into a conical shape gradually extending toward the opening side. The slip-off member 10 is formed of a ring-shaped plate member having an inner peripheral part 10a having diameter smaller than inner diameter of the small diameter hole 9a, and an outer peripheral part 10b having diameter smaller than that of the opening end part of the slip-off member fitting hole 9b and larger than that of a cylinder hole bottom side end part of the slip-off member fitting hole 9b, and is pressed in and fixed to the slip-off member fitting hole 9b.</p> |
