Electromechanical actuating drive
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0 Petitions
Accused Products
Abstract
An electromechanical actuating drive, in particular a piezoelectric microstepper motor, has two piezoelectric bending transducers having in each case an effective direction not oriented parallel to one another. Said bending transducers act on a drive ring in order, via the latter, to rotate a shaft. The bending transducers are articulated via a sliding coupling or a shear-flexible structure, thereby minimizing mutual obstruction of the bending transducers during the displacement movement.
8 Citations
18 Claims
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1-7. -7. (canceled)
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8. An electromechanical actuating drive, comprising:
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at least two electromechanical drive elements each having an effective direction of deflection that is not parallel to the effective direction of deflection of the other drive element; a shaft rotatably mounted in a drive ring in such a way that the drive ring is stimulated by deflection of the electromechanical drive elements in their respective effective directions, the electromechanical drive elements stimulating the drive ring to cause a displacement movement of the drive ring, which is directly transmitted to the shaft such that the shaft rolls in contact with the drive ring and thereby rotates; and a slip coupling or a shear-flexible structure to link each of the electromechanical drive elements to the drive ring such that a mutual obstruction of the drive elements during the displacement movement is minimized. - View Dependent Claims (9, 10, 12, 13, 14, 15, 16, 17)
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18. An electromechanical microstepper actuating drive, comprising:
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two electromechanical piezoelectric drive elements, each having a longitudinal axis and an effective direction of deflection that is not parallel to the effective direction of deflection of the other drive element; a shaft arranged in a drive ring in such a way that the drive ring is stimulated by deflection of the drive elements in their respective effective directions, the drive elements stimulating the drive ring to cause a displacement movement of the drive ring, which is directly transmitted to the shaft, wherein each drive element has first and second ends, the first end being fixedly connected to the drive ring and the second end being fixedly connected to a housing, the drive ring has an inner opening with a center point, and the two drive elements are arranged such that; the two drive elements lie in a plane spanned by the effective directions and in two different tangential planes that are tangential to the inner opening of the drive ring such that in the case of a rotationally symmetrical arrangement of the drive elements about the center point, the two different tangential planes are offset from one another by an angle γ
in the range of 180°
<
γ
<
360°
, or in the case of a mirror-symmetrical arrangement of the drive elements about an imaginary diameter of the drive ring, the two different tangential planes are offset from one another by an angle γ
in the range of 0°
<
γ
<
180°
, orthe two drive elements lie outside the plane spanned by the effective directions and in two different tangential planes that are tangential to the inner opening of the drive ring, or a first drive element lies in the plane spanned by the effective directions, a second drive element lies outside the plane spanned by the effective directions, and the first and second drive elements lie in two different tangential planes that are tangential to the inner opening of the drive ring.
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Specification