Electrically-driven thrust generator
AssigneeTeijin Seiki Co., Ltd.
InventorKiyozumi Fukui
Life of this patent
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Abstract
An electrically-driven thrust generator is provided, which can contribute energy saving, and has properties (thrust controllability, swift action etc.) equivalent to hydraulic cylinders and contributes to solve problems (leakage etc.) associated with oil pipings. The electrically-driven thrust generator comprises a motor 3, a variable reduction ratio speed reducers 5, a rotary motion to linear motion converting mechanism 7, a thrust rod 121 linearly driven by this rotary motion to linear motion converting mechanism 7. The present invention is characterized in that the rotary motion to linear motion converting mechanism 7 comprises an oscillating crank plate driven rack mechanism, which provides a compact and powerful electrically-driven thrust generator equivalent to hydraulic thrust generator.
Claims25
An electrically driven thrust generator comprising:
- an electrically driven motor;
- a variable reduction ratio speed reducer for reducing rotation of the motor;
- a rotary motion to linear motion converting mechanism for converting rotary motion output from the speed reducer to linear motion;
- and
- a thrust rod linearly driven by the rotary motion to linear motion converting mechanism;
- wherein
- the thrust rod is disposed to contact an object to apply thrust to the object;
- and
- said rotary motion to linear motion converting mechanism comprises an oscillating crank plate driven rack mechanism.
An electrically driven thrust generator comprising:
- an electrically driven motor;
- a variable reduction ratio speed reducer or reducing rotation of the motor;
- a rotary motion to linear motion converting mechanism comprising an oscillating crank plate driven rack mechanism for converting rotary motion output from the speed reducer to linear motion;
- a thrust rod linearly driven by the rotary motion to linear motion converting mechanism, the thrust rod being disposed to contact an object to apply thrust to the object;
- a thrust detector for detecting the thrust of the thrust rod to detect contact between the thrust rod and the object when the thrust reaches a first threshold value, and for detecting a desired thrust when the thrust reaches a second threshold value;
- a reduction ratio changer for maintaining a relatively lower reduction ratio of said variable reduction ratio speed reducer so that the thrust rod is driven relatively rapidly, and for changing the reduction ratio of said speed reducer to relatively higher ratio so that the thrust rod is driven relatively slowly;
- a motor controller for stopping the motor when the desired thrust is achieved;
- a thrust reduction preventing means for preventing the thrust of the thrust rod from being reduced after the motor has stopped;
- a shock reducing means for reducing a shock generated when the thrust rod contacts the object.
Dependencies are inferred from the claim text.