Title:
VACUUM PUMP
Document Type and Number:
WIPO Patent Application WO/2013/137053
Kind Code:
A1
Abstract:
The present invention prevents a decline in the durability of a vacuum pump by suppressing damage to a rotor and a side plate by using a simple configuration. A vacuum pump is provided with a casing body (22) attached to an electric motor (10), and a hollow cylinder chamber (S) formed in the casing body (22) and having openings on both ends of the casing body (22). The output shaft (12) of the electric motor (10) is provided with a rotor (27) that is rotatably driven inside the cylinder chamber (S) along with the output shaft (12), and a pair of side plates (25, 26) for blocking the openings of the cylinder chamber (S). The tip part (12A) of the output shaft (12) is provided with a male screw (12B). A female screw (27D) formed in a shaft hole (27A) of the rotor (27) engages with the male screw (12B). The male screw (12B) is provided with a nut (70) for fixing the rotor (27) by tightly abutting the front-end surface (27G) of the rotor (27).
Inventors:
TANAKA KATSUNORI (JP)
Application Number:
PCT/JP2013/055929
Publication Date:
September 19, 2013
Filing Date:
March 05, 2013
Export Citation:
Assignee:
NABTESCO AUTOMOTIVE CORP (JP)
International Classes:
F04C18/344; F04C25/02; F04C29/00
Domestic Patent References:
| WO2011126032A2 | 2011-10-13 |
Foreign References:
| JPH01157295U | 1989-10-30 | |||
| JP2010174851A | 2010-08-12 |
Attorney, Agent or Firm:
KUSHIBUCHI & ASSOCIATES (JP)
Patent business corporation クシブチ international patent firm (JP)
Patent business corporation クシブチ international patent firm (JP)
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