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Patent Searching and Data


Title:
WATER PUMP
Document Type and Number:
WIPO Patent Application WO/2015/040973
Kind Code:
A1
Abstract:
Provided is a water pump that achieves the downsizing of a pump housing that comprises a main impeller and an auxiliary impeller. The present invention is provided with: a pump housing (2) that has a pump chamber (3) formed inside a cylinder block (01) side front end; a drive shaft (6) that is rotatably provided inside the pump housing and that has a pulley (4) provided to a large-diameter shaft part (6a); and a main impeller (7) that is arranged in the pump chamber, that is provided to a small-diameter shaft part (6c) of the drive shaft with a bearing part (15) and a follower ring (16) therebetween so as to be relatively rotatable, and that is intermittently connected to the drive shaft by a clutch spring (20). An auxiliary impeller (32) is provided to a tip part of the small-diameter shaft part at a position that is separated from the main impeller in the axial direction. The auxiliary impeller is arranged inside a leading path (03) that communicates with the pump chamber in the axial direction.

Inventors:
YOSHIMURA, Takeshi (LTD. 7-1 Onna 4-chome, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
ONIGATA, Junichiro (LTD. 7-1 Onna 4-chome, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
Application Number:
JP2014/070813
Publication Date:
March 26, 2015
Filing Date:
August 07, 2014
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F04D13/12; F04D13/14; F04D29/043; F04D29/18; F16D13/08
Foreign References:
JPH07332086A
JPS382667B1
JPS60147794U
JP2005307985A
JPH041693U
JPH0469697U1992-06-19
JPH11336686A
JPH02119995U
JPH0430293U
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (Ekisaikai Bldg. 1-29, Akashi-cho, Chuo-k, Tokyo 44, 〒1040044, JP)
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