Vane pump

Patent metadata

Field	Value
Publication number	US-2019072091-A1
Application number	US-201615767215-A
Country	US
Kind code	A1
Filing date	Sep 20, 2016
Priority date	Oct 21, 2015
Publication date	Mar 7, 2019
Grant date	—

Abstract

A vane pump includes a rotor that is rotationally driven; vanes inserted into the rotor in a freely slidable manner; pump chambers that are defined between the vanes at adjacent positions; suction ports that guide working oil to the pump chambers; suction pressure chamber that is communicated with the suction ports and that stores the working oil; and a suction passage that is connected to the suction pressure chamber and that has an suction opening end that opens at an outer surface of a pump body. In a state in which the vane pump is mounted, the suction pressure chamber is mounted below the suction opening end of the suction passage.

First claim

1 . A vane pump used as a fluid pressure source, comprising:
a rotor configured to be driven rotationally; a plurality of vanes inserted into the rotor in a freely slidable manner; a cam ring with which tip-end portions of the vanes are brought into sliding contact with rotation of the rotor; a pump body configured to accommodate the cam ring; a pump cover configured to seal the pump body; pump chambers defined between the vanes at adjacent positions and the cam ring; a suction port configured to guide working fluid to the pump chambers; a storage chamber configured to store the working fluid, the storage chamber being configured to communicate with the suction port; and a suction passage configured to have a connection portion and a suction opening end, the connection portion being connected to the storage chamber and the suction opening end being configured to open at an outer surface of the pump body; wherein the storage chamber is provided below the suction opening end of the suction passage in a state in which the vane pump is mounted.

2 . The vane pump according to claim 1 , wherein
the suction port has a first suction port and a second suction port provided so as to be opposed to each other with respect to a rotation center of the rotor, and the storage chamber has a communication portion with which the first suction port is communicated with the second suction port.

3 . The vane pump according to claim 2 , wherein
the first suction port and the second suction port are arranged on a horizontal line extending through the rotation center in a state in which the vane pump is mounted.

4 . The vane pump according to claim 2 , wherein
in a state in which the vane pump is mounted: the first suction port is configured to guide the working fluid to the pump chambers, the pump chambers being those contracted below the rotation center among the pump chambers; the second suction port is configured to guide the working fluid to the pump chambers, the pump chambers being those contracted above the rotation center among the pump chambers; and the first suction port is configured to communicate with the storage chamber at a portion closer to the connection portion than the second suction port.

5 . The vane pump according to claim 1 , wherein
the storage chamber is provided so as to extend over the pump body and the pump cover.

6 . The vane pump according to claim 1 further including:
a discharge port to which the working fluid to be discharged from the pump chambers is guided;
a high-pressure chamber configured to store the pressurized working fluid, the high-pressure chamber being configured to communicate with the discharge port; and
a discharge passage configured to have a discharge opening end and to communicate with the high-pressure chamber, the discharge opening end being configured to open at the outer surface of the pump body; wherein
the storage chamber is provided below the discharge opening end of the discharge passage in a state in which the vane pump is mounted.

Assignees

• Kyb Corp

Inventors

• Maki Yoshiyuki
• Nakagawa Tomoyuki
• Sugihara Masamichi

Classifications

• F05B2240/14

  Casings, housings, nacelles, gondels or the like, protecting or supporting assemblies there within · CPC title

• F05B2250/501

  Inlet · CPC title

• F04C2/344

  with vanes reciprocating with respect to the inner member · CPC title

• F04C2210/206

  Oil · CPC title

• F04C2250/101

  of the inlet · CPC title