| 摘要 |
PROBLEM TO BE SOLVED: To prevent interference between a main part of a lead part and a return spring or the like so as to prevent damage or breakage in the lead wire by forming a claw part holding the lead in a predetermined position in a power piston and connecting the main part of the lead wire positioned inside a shell to a power piston by means of the claw part. SOLUTION: In a shell 2 of this tandem brake servo unit, a front power piston 11 and a rear power piston are respectively connected to the outer circumferential part of a valve body 6 positioned in front and rear chambers defined by a center plate. In the front power piston 11, a claw part 11A is formed in the vicinity of the outer circumference part by punching the front power piston 22 in a U-shape toward the front side. In the claw part 11A, the punched part is protruded to the front side with its cross section formed into an L-shape, while the back face position of the claw part 11A is left as an rectangular hole 11B, and a lead wire 45 is inserted through the inside of the claw part 11A along the inner circumferential direction of the power piston 11. |
