Driving Device for an Extendible and Retractable Actuator
First Claim
Patent Images
1. A driving device for an extendible and retractable actuator comprising:
- a first rod being hollow inside and opened towards one end thereof, the first rod being disposed with a plurality of studs inside the open end thereof;
a second rod is hollow inside and opened towards one end thereof, the second rod being disposed with a plurality of studs inside the open end thereof, the second rod further including an outer thread outside thereof, the second rod being screwed to the studs of the first rod by use of the outer thread thereof;
a third rod including an outer thread outside thereof, the third rod being screwed to the studs of the second rod by use of the outer thread thereof; and
a motor being drivingly connected with the third rod.
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Abstract
A driving device for an extendible and retractable actuator comprises a first rod, a second rod, a third rod and a motor. The first rod is screwed with the second rod. The second rod is screwed with the third rod. By such arrangements, the motor can drive the first and the second rods to move while driving the third rod to rotate. After the third rod is engaged with the second rod, the first rod can be also driven to move.
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Citations
9 Claims
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1. A driving device for an extendible and retractable actuator comprising:
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a first rod being hollow inside and opened towards one end thereof, the first rod being disposed with a plurality of studs inside the open end thereof; a second rod is hollow inside and opened towards one end thereof, the second rod being disposed with a plurality of studs inside the open end thereof, the second rod further including an outer thread outside thereof, the second rod being screwed to the studs of the first rod by use of the outer thread thereof; a third rod including an outer thread outside thereof, the third rod being screwed to the studs of the second rod by use of the outer thread thereof; and a motor being drivingly connected with the third rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification