Electric pump apparatus
AssigneeNissei Plastic Industrial Co., Ltd.
InventorsToshiaki Nakamura, Kenichi Hayashi, Daiki Tanemura
Life of this patent
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Abstract
A motor-driven apparatus includes a pump and a servo motor connected respectively to outer sides of opposed upstanding support plates. A pump shaft and a servo motor shaft extend horizontally toward each other into a space between the support plates and are coupled together by a flexible coupling. The servo motor includes a fan cover enclosing and spaced from a motor frame of the servo motor. A cooling fan disposed inside the fan cover circulates air in the space between the fan cover and the motor frame to air-cool the motor frame.
Claims13
A motor-driven pump apparatus mountable on a horizontal mounting surface of a machine base, the motor-driven pump apparatus comprising:
- a base portion configured to be mounted on a horizontal mounting surface of a machine base;
- a pump-side support plate and a motor-side support plate extending upwardly from the base portion in spaced-apart relationship from each other;
- a pump comprising a pump flange connected to an outer side of the pump-side support plate, and a rotary pump shaft extending horizontally through openings in the pump flange and the pump-side support plate and terminating at a front end in the space between the pump-side and the motor-side support plates;
- a vibration absorbing ring interposed between the outer side of the pump-side support plate and the pump flange for absorbing vibrations generated by the pump, the vibration absorbing ring having an inner section overlapping the opening in the pump-side support plate and connected to the pump flange, and an outer section not overlapping the opening in the pump-side support plate and connected to the pump-side support plate;
- a servo motor comprising a motor flange connected to an outer side of the motor-side support plate, a rotary motor shaft extending horizontally through openings in the motor flange and the pump-side support plate and terminating at a front end in the space between the pump-side and the motor-side support plates, a rotor mounted on the motor shaft, a stator surrounding the rotor, a motor frame connected to the motor flange and enclosing the rotor and the stator, a sensor connected to a rear end of the motor shaft, a fan cover enclosing both the sensor and a major lengthwise portion of the motor frame, and a cooling fan disposed inside the fan cover to circulate air in a space between the fan cover and the motor frame to air-cool the motor frame;
- and
- a coupling disposed in the space between the pump-side and the motor-side support plates and interconnecting the pump shaft and the motor shaft.
Dependencies are inferred from the claim text.