Title:
VARIABLE-CAPACITY VANE PUMP
Document Type and Number:
WIPO Patent Application WO/2018/051904
Kind Code:
A1
Abstract:
This vane pump (100) comprises: a rotor (2) connected to a drive shaft (1); a plurality of vanes (3) provided so as to be able to be capable of reciprocal movement in the radial direction with respect to the rotor (2); a cam ring (4) having a cam face (4a) against which slide the tips of the vanes (3) as a result of the rotation of the rotor (2), and that is provided so as to be capable of eccentric movement with respect to the rotor (2); a second pump body (20) that houses the cam ring (4); and a spring (30) that is interposed in a compressed state between the cam ring (4) and the second pump body (20), and that energizes the cam ring (4) in a direction such that that the eccentricity with respect to the rotor (2) increases. The cam ring (4) and the second pump body (20) have seating surfaces (6a, 20a) on which the spring (30) is seated, and grooves (6b, 20b) formed in the seating surfaces (6a, 20a).
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Inventors:
AKATSUKA KOICHIRO (JP)
GOMI HIROKI (JP)
SOBUE FUMIHIKO (JP)
GOMI HIROKI (JP)
SOBUE FUMIHIKO (JP)
Application Number:
PCT/JP2017/032427
Publication Date:
March 22, 2018
Filing Date:
September 08, 2017
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
F04C14/22; F04C2/344
Domestic Patent References:
| WO2015097637A1 | 2015-07-02 |
Foreign References:
| JP2008309049A | 2008-12-25 | |||
| JP2007154835A | 2007-06-21 | |||
| JPH05149260A | 1993-06-15 | |||
| JP2008111364A | 2008-05-15 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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