| 摘要 |
PURPOSE: An automotive vane-type vacuum pump is provided to improve durability without adherence between an axial end surface of a rotor and a case. CONSTITUTION: An automotive vane-type vacuum pump comprises: a bottomed cylindrical case(30) having an inlet(1) and an outlet(2); a rotor(24) eccentrically accommodated in the case; a shaft(21) secured to the rotor, having both ends thereof rotatably supported by both bottom surfaces of the case, and rotates the rotor by an external driving force; and a vane(11) rotating slidably in contact with the inner peripheral surface of the case while moving in and out of the rotor as the rotor rotates. The axial movement of the shaft is restricted by slidable contact between axial movement restricting stepped portions(28) provided on both ends of the shaft and the case, and a very small gap is formed between an axial end surface of the rotor and the case. Therefore, the axial end surface of the rotor and case are not adhered, quality is improved, and durability is improved.
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