| 摘要 |
A vane pump, in which any core is dispensed with and a cover is molded by die casting, comprises a side plate (8), which supports thereon a drive shaft (50) and is mounted between a body (1) mounting therein a cam ring (30) and the cam ring (30), and in which a low pressure port (82) communicating to a suction region of the cam ring (30) and a high pressure port (81) communicating to the suction region and a high pressure chamber (12) in the body (1) are provided symmetrically, and a forked passage (13), which is formed as a gap between an inner periphery of the body (1) and an upper semicircular portion of an outer periphery of the cam ring (30) and branches along the outer periphery of the cam ring (30) from a suction chamber (10) communicating to a low pressure chamber (10). A cover (2) connected to an open end surface of the body (1) is provided with an end surface (2A), which abuts against one end surface of the cam ring (30), and a forked recessed groove (6) in the form of groove is formed on the end surface (2A) to correspond to a suction region of the cam ring (30).
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