| 摘要 |
PROBLEM TO BE SOLVED: To provide a light weight assistor securing strength and a brake system therewith capable of stably operating under harsh environment.SOLUTION: An assistor 1 includes a rear shell 3. A plane part 33 of the rear shell 3 has first support parts 33a capable of supporting tie-rods 22 in a first positional relation symmetric around the center O of a cylindrical part 34, and second support parts 33b capable of supporting tie-rods 22 in a second positional relation symmetric around the center O of the cylindrical part 34 and different from the first positional relation. A boundary between the plane part 33 and an inclination part 32 keeps to elongate vertically downward from a position 36a that is the highest position in the vertical direction to positions 36b, 36c that are most distant from each other. |
