| 摘要 |
PROBLEM TO BE SOLVED: To provide a vane pump for improving pump performance, by preventing leaking-out of a working fluid in an operation chamber, by smoothly sliding a vane. SOLUTION: The vane 4 is slidingly stored in the radial direction of a rotor 3 in respective vane grooves 19 of the rotor 3. The operation chamber 5 is formed for increasingly-decreasingly changing its volume by rotational driving of the rotor 3 by being surrounded by an inner surface of a pump room 2, an outer peripheral surface 3a of the rotor 3 and the vane 4. A sliding contact object part 14 is projected from an inner peripheral surface 2a of the pump room 2. An inner peripheral surface of the sliding contact object part 14 is formed as a sliding contact surface slidingly contacting with the tip of the respective vanes 4. A flange part 27 is projected on the outer peripheral surface 3a of the rotor 3. An extension slide surface 35 for sliding the vanes 4 on the same plane as a bottom surface of the vane grooves 19, is formed on one side surface of the flange part 27. An outer peripheral part of the flange part 27 is arranged in a position opposed to the sliding contact object part 14 in the thrust direction of the rotor 3. COPYRIGHT: (C)2009,JPO&INPIT
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