Vane pump

• US 20060073027A1
• Filed: 09/28/2005
• Published: 04/06/2006
• Est. Priority Date: 10/06/2004
• Status: Active Grant

• Current Assignee: KYB Corp.
• Original Assignee: Kayaba Industry Company Limited (KYB Corp.)
• Inventors: Yakabe, Shinji, Ide, Norikazu, Nagasaka, Ryouichi
• Granted Patent: US 7,575,420 B2
• Time in Patent Office: Days
• US Class Current: 417/310
• CPC Class Codes: F01C 21/108 with an axial surface, e.g. side plates
• CPC Class Codes: F04C 2/3446 the inner and outer member being in contact along more than one line or surface
• CPC Class Codes: F04C 2230/603 Centering; Aligning
• CPC Class Codes: F04C 2240/80 Other components

Abstract

A vane pump of the present invention is provided with a bearing convex portion (20) disposed in such a way to be raised from the bottom of a concave portion (13) of a cover (60) to form a bearing hole (25) and fitted into a central bore (27) of a first side plate (12), and a first locating pin (28) standing at the bottom of the concave portion (13), penetrating through the first side plate (12) and inserted into a cam ring (3).

Claims

1. A vane pump, comprising:

a body including a body bore therein;

a cover contacting the body to close the body bore, the cover being arranged to have a concave portion therein opened at a side of the body;

a cam ring arranged to be in close contact with an inner peripheral surface of the body bore;

a cylindrical rotor incorporated inside the cam ring and arranged to be co-axial with the cam ring;

a plurality of vanes inserted into a plurality of vane grooves formed in a radial direction of the rotor;

a rotating shaft penetrating axially through the rotor, wherein the rotating shaft has one end supported by a bearing hole disposed in the concave portion and rotates by a driving force of a drive source to rotate the rotor;

a bearing supporting the rotating shaft, the bearing being disposed inside the body;

a first side plate including a central bore and fitted into the concave portion;

a bearing convex portion arranged so as to be raised from a bottom of the concave portion to form the bearing hole and fitted into the central bore of the first side plate; and

a first locating pin standing from the bottom of the concave portion, penetrating through the first side plate, and inserted into the cam ring.

2. The vane pump according to claim 1, further comprising:

a second side plate provided inside the body bore and being opposite to the first side plate so that the rotor is placed between the first side plate and the second side plate;

a high-pressure outlet portion disposed in the second side plate to send out a pressure from chambers defined by the neighboring vanes;

a pressure inlet portion disposed in the first side plate to balance pressures applied to the chambers defined by the neighboring vanes in an axial direction from both sides of the rotor; and

a second locating pin raised from the first side plate and inserted into the cam ring, wherein;

a relative position between the pressure inlet portion and the high-pressure outlet portion is maintained by the first locating pin and the second locating pin.

3. The vane pump according to claim 2, wherein:

the concave portion includes a part of a bottom of a suction flow passage for supplying a fluid to the chambers defined by the neighboring vanes, and

the first locating pin stands at a position avoiding the suction flow passage.

4. The vane pump according to claim 1, wherein:

the first side plate includes a locating concave portion to fit the first locating pin, wherein;

the locating concave portion is disposed at a position where, in a state the first locating pin is fitted into the locating concave portion, when the first side plate is rotated around the first locating pin, a trace of a center of the first side plate passes a center of the bearing convex portion.