| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an internal gear pump that can reduce generation of gear rattling sound. <P>SOLUTION: In an electrically driven oil pump including a center housing 2 having a pump element housing part 24, an outer rotor 21 freely rotatably housed in the pump element housing part 24 and having an inner tooth on the inner peripheral side, a pump rotor 22 freely rotatably provided on the inner peripheral side of the outer rotor 21 and having an outer tooth engaged with the inner tooth on an outer peripheral side and a rotor driving shaft 32 connected to the pump rotor 22 and rotating and driving the pump rotor 22, the chip clearance CLt1 in a confinement part 52 having the maximum volume among a plurality of volume chambers formed between the inner tooth and the outer tooth after pump assembly is made to be smaller than a chip clearance CLt0 before the pump assembly. <P>COPYRIGHT: (C)2013,JPO&INPIT |
