| 摘要 |
PROBLEM TO BE SOLVED: To provide a vane pump for preventing the leakage of operating fluid to the outside of a housing. SOLUTION: The vane pump comprises a rotor 2 connected to a driving shaft 1, a plurality of vanes 3 provided on the rotor 2 reciprocatively in the radial direction, a cam ring 4 storing the rotor 2 and having an inner periphery cam face 4a on which the front ends of the vanes 3 slide with the rotation of the rotor 3, a pump chamber 7 defined between the rotor 2 and the cam ring 4, and the housing 13 storing the cam ring 4 and having a low pressure part and a high pressure part defined inside. Herein, connection means 36, 37 are formed on a partition part 35 which partitions the housing 13 into the high pressure part 9 and the low pressure part 30, for connecting the high pressure part 9 with the low pressure part 30 before pressure in the high pressure part rises to reach the breakdown strength of the housing 13. COPYRIGHT: (C)2009,JPO&INPIT
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