| 摘要 |
PROBLEM TO BE SOLVED: To effectively reduce a possibility that a hydraulic fluid leaks outside through a residual air release passage even when a hydraulic fluid injection port of a reservoir tank is tilted downward greatly.SOLUTION: A cap 18 is formed in such a way as to be surrounded by the sidewall 20a of a cylindrical shape of a baffle 20, the bottom part 20b of the baffle 20, and a diaphragm 21 and has a space communicated with the outside of the reservoir tank through a part of an air release passage. The upper surface 20f of the bottom part 20b is structured as an inclined surface that rises upward gradually as it goes from the inner circumferential sidewall surface 20g of the bottom part 20b to the central axis 20d of the bottom part 20b. Moreover, baffle side vent holes 20h, 20i, which communicate the interior part of the reservoir tank with the space, are provided at the side edge of the inner circumferential sidewall of the bottom part 20b. |
