Motor-mounted internal gear pump and manufacturing method thereof and electronic equipment

• Main Authors: Kameya, Hirotaka, Nakanishi, Masato, Yanagase, Yuuichi, Sato, Eiji, Aizawa, Kouji
• Format: Patent
• Language: English
• Published: 11.10.2011

a, a To maintain the functionality as a compact and inexpensive motor-mounted internal gear pump and also offer further inexpensiveness and reliability. The motor-mounted internal gear pump has a pump part including: an inner rotor , an outer rotor , a pump casing and an internal shaft . The pump casing has flat inner surfaces facing both end faces of the inner rotor and the outer rotor . The internal shaft includes a bearing which is inserted into an axial hole of the inner rotor and a fitting part extending from both its ends in both axial directions. The pump casing includes two pump casing members as separate members with flat inner surfaces respectively. The fitting part of the internal shaft is fitted in to fitting holes made in the flat inner surfaces of the two pump casing members and the two pump casing members are connected with each other outside the outside diameter of the outer rotor while both end faces of the bearing are in contact with the flat inner surfaces