| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump device with improved durability.SOLUTION: A pump device 1 includes a pulsation reduction device 3 (a pulsation reduction part) which is provided in a passage at the downstream side of a discharge chamber of a pump 2 provided in a housing 10 and reduces pulsation of a discharged brake fluid. The pulsation reduction device 3 includes: a valve seat 72 which is provided at an oil passage 12 (the passage) and is fixed to the housing 10; a valve body 8 which has a spherical valve part 80 contacting with the valve seat 72 and may be seated on the valve seat 72; a biasing member 9 which biases the valve body 8 toward the valve seat 72; a first orifice 12a which allows the discharged brake fluid to pass in a state where the valve body 8 is seated on the valve seat 72; a second orifice 12b having a flow passage area that becomes larger than that of the first orifice 12a when the valve body 8 is separated from the valve seat 72; and a guide part 5a which guides the operation of the valve body 8 in a separation direction. |
