| 摘要 |
<p>PROBLEM TO BE SOLVED: To while adopt opposed 4 pots in a divided type caliper body, suppress a fluid pressure loss as small as possible caused by brake reaction force, prevent knock back of a piston and a rise up delay of the initial brake, also eliminate a surplus play stroke of a brake operator, and obtain an operating feeling having a rigidity sense in the brake operator. SOLUTION: In case that a pitch P1 between a disk turn in side and a bolt of connection bolts 6c, 6c in an intermediate part is longer than a pitch P2 between the intermediate part and bolt of connection bolts 6c, 6b in a disk turn out side, in the disk turn in side, a piston 9 of diameter smaller than a piston 10 in the disk turn out side is used. A fluid passage 13b, 14b of two brake systems is provided by interposing the connection bolt 6 in a connection surface 3h.</p> |
