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Title:
FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2016/189837
Kind Code:
A1
Abstract:
A fuel pump is provided with: a motor (20); an impeller (39) that has fitting holes (44, 71) that fit to an output end (37) of a rotation shaft (31) of the motor (20); and a case (48) that has a pump chamber (41), which houses the impeller (39), an intake hole (13), which penetrates from the pump chamber (41) to one side in the shaft direction, and a discharge hole (47), which penetrates from the pump chamber (41) to the other side in the shaft direction. The outer wall surface of the output end (37) includes a pair of first planes (51, 52) that are parallel to one another. The inner wall surfaces of the fitting holes (44, 71) are parallel to one another in a cross-section that is orthogonal to the axial center of the impeller (39), and include a pair of second planes (61, 62, 72, 73) that engage with the first plane (51) on one side or the first plane (52) on the other side when the rotation shaft (31) rotates in a predetermined rotation direction. If the distance between the pair of first planes (51, 52) is called the two-plane width (S), the value obtained by dividing the two-plane width (S) by the outer diameter (D) of the output end (37) does not exceed 0.75.

Inventors:
HIDAKA, Yuuji (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
SAKAI, Hiromi (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2016/002444
Publication Date:
December 01, 2016
Filing Date:
May 19, 2016
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
F02M37/08; F02M37/10; F04D5/00
Foreign References:
JP2015083827A2015-04-30
JPH0637587U1994-05-20
JP2015086860A2015-05-07
JP2007303349A2007-11-22
Attorney, Agent or Firm:
KIN, Junhi (6th Floor, Takisada Bldg. 2-13-19, Nishiki, Naka-ku, Nagoya-cit, Aichi 03, 〒4600003, JP)
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