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Title:
MOTOR DRIVEN PUMP AND DRIVE JOINT
Document Type and Number:
Japanese Patent JP3667034
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To reduce pulsation when oil is delivered in an motor driven pump equipped with a suction chamber sectioned by engagement of a driving gear and a driven gear, by arranging a noise damper cylinder which is fixed to a housing supporting body by fitting and communicated with an exhausting chamber.
SOLUTION: A motor driven pump 1 is equipped with a pump housing 7 having a suction chamber and a delivery chamber which are sectioned by the engagement of a driving gear 5 and a driven gear, and a first communicating hole 91 communicated with an delivery opening 75 and a second communicating hole 92 extended in parallel with the first communicating hole 91, are formed in one housing supporting body 9 out of two housing supporting bodies 8, 9 by which the pump housing 7 is supported from both sides. Also, a fitted part 93 to which a fitting fixed part 23 is threadably attached, is arranged in the opening end side inner circumference of the cylindrical wall part 9b of the second housing supporting body 9, and a bottomed noise damper cylinder 20 which is communicated with the delivery chamber through the communicating hole 91 and the delivery opening 75 and has a dead chamber 20a whose capacity is large than the delivery chamber, is attachably/detachable threadably attached to this fitted part 93.


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Inventors:
Hamazaki, Yoshiaki
Obata, Yoshifumi
Iida, Toshio
Application Number:
JP1997000161623
Publication Date:
July 06, 2005
Filing Date:
June 18, 1997
Export Citation:
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Assignee:
KOYO SEIKO CO LTD
International Classes:
F04C2/18; F04C11/00; F04C15/00; F04C15/06; F16D3/12; F16H61/38; (IPC1-7): F04C15/00; F04C2/18
Domestic Patent References:
JP7208290A
Attorney, Agent or Firm:
河野 登夫



 
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