PUMPING DEVICE

PROBLEM TO BE SOLVED: To simplify the structure of a passage hole for leading an operating fluid leaking from a pumping device to lubricate a bearing, to a low pressure part. SOLUTION: A vane pump part 20 having a rotor 22 and a cam ring 21 is built in a housing 10, and an operating fluid leaking fr...

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Bibliographic Details
Main Author INAGUMA YOSHIHARU
Format Patent
LanguageEnglish
Published 05.04.2002
Edition7
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To simplify the structure of a passage hole for leading an operating fluid leaking from a pumping device to lubricate a bearing, to a low pressure part. SOLUTION: A vane pump part 20 having a rotor 22 and a cam ring 21 is built in a housing 10, and an operating fluid leaking from a sliding part of the vane pump part lubricates a bearing 27 for supporting a pump shaft 26 to which the rotor is connected. One of two longitudinal positioning pins 30, 31 for supporting the cam ring 21 to the housing is formed as a hollow pin, and the rear end of its inner hole 30a is communicated with an intake passage 13 for feeding the operating fluid from a reservoir, while the front end is communicated with a space for enclosing the bearing to return the operating fluid after lubrication to the intake passage. It is preferable that a drain groove 33 for communicating the front and rear parts in the space for enclosing the bearing is formed on the inner surface of a support hole 10d for supporting the bearing.
Bibliography:Application Number: JP20000287423