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Vibration actuator

A vibration actuator, vibration mechanism technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, etc. The direction is deviated in an undesired direction, and the movable range of the rotor is reduced, etc.

Inactive Publication Date: 2013-07-10
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the vibration actuator of Patent Document 1, since the stator rotates the spherical rotor, when the rotor is rotated in a predetermined direction, there is a problem that the rotation direction is deviated in an undesired direction.
In addition, as the rotor rotates, the steel wire bends and moves in the through hole of the rotor, and the rotatable range of the rotor is restricted by the moving range of the steel wire in the through hole, thereby reducing the movable range of the rotor.

Method used

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  • Vibration actuator
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] First, use Figure 1~5 , shows the configuration of the vibration actuator 101 according to Embodiment 1 of the present invention.

[0026] refer to figure 1 , the vibration actuator 101 includes a pair of semi-cylindrical roller portions 1a and 1b. The roller portions 1a and 1b are arranged oppositely in a mirror image relationship of the same shape. The roller portions 1 a and 1 b are connected by a first roller shaft 10 as a rotation center axis, and the axis center of the cylinders of the roller portions 1 a and 1 b is the same as the axis center of the first roller shaft 10 . Among them, the roller portions 1a and 1b constitute the first roller 1 as one roller that operates integrally, which will be described later.

[0027] In addition, an approximately cylindrical first stator 3 is provided, which is disposed so as to be in contact with the respective cylindrical surfaces 1aa and 1ba of the roller portions 1a and 1b. On the first stator 3, a groove portion 3c...

Embodiment approach 2

[0065] In the vibration actuator 102 according to the second embodiment of the present invention, the configuration of the first piezoelectric element 5 in the vibration actuator 101 of the first embodiment is changed, and the first base block 7 is further used as a third stator, and An actuator that is not fixed and can slide relative to the third base block 9 .

[0066] In addition, in the following embodiments, the same reference numerals as those in the previous drawings denote the same or similar constituent elements, and thus detailed description thereof will be omitted.

[0067] First, use Figure 6 ~ Figure 8 The configuration of the vibration actuator 102 according to Embodiment 2 of the present invention is shown.

[0068] refer to Image 6 , same as Embodiment 1, the vibration actuator 102 is provided with the first roller 1 and the first stator 3, and the end surface of the first stator 3 opposite to the first roller 1 is provided with a cylindrical The first pi...

Embodiment approach 3

[0087] The vibration actuator 103 according to Embodiment 3 of the present invention can change the first roller axis 10 of the first roller 1 and the first roller shaft 10 of the second roller 2 which are arranged on the same plane in the vibration actuator 101 of Embodiment 1. The positional relationship between the second roller shaft 11a and the third roller shaft 11b.

[0088] refer to Figure 9 , the roller portions 31 a and 31 b of the first roller 31 are connected by a first roller shaft 310 , and the roller portions 32 a and 32 b of the second roller 32 are connected by a second roller shaft 311 . Same as Embodiment 1, the roller parts 31a and 31b and the roller parts 32a and 32b are combined into one body. At this time, the respective directions of the first roller shaft 310 and the second roller shaft 311 are perpendicular to each other, but they are not intersecting each other. Separate configurations in direction. Therefore, the roller portions 31a and 31b of th...

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Abstract

A rotor can be rotated in a predetermined direction and can be moved in a wide range. A vibration actuator (101) is provided with a roller body (100) integrally including a first roller (1) and a second roller (2) which have different rotation axes.  The first roller (1) has a first roller shaft (10), and the second roller (2) has a second roller shaft (11a) and a third roller shaft (11b).  The vibration actuator (101) also has a first stator (3) mounted to the first roller (1) so as to be in contact therewith, a second stator (4) mounted to the second roller (2) so as to be in contact therewith, a first piezoelectric element (5) for vibrating the first stator (3) to rotate the first roller (1) about the rotation axis thereof, and a second piezoelectric element (6) for vibrating the second stator (4) to rotate the second roller (2) about the rotation axis thereof.

Description

technical field [0001] The present invention relates to a vibration actuator that rotates a roller by vibration of a vibration mechanism. Background technique [0002] A vibration actuator driven by generating ultrasonic vibrations has been proposed as an actuator used in a part requiring multi-degree-of-freedom and high-torque drive, such as a joint of a robot hand or an arm. [0003] For example, Patent Document 1 shows a vibration actuator including two stators sandwiching a spherical rotor and a single wire passing through the rotor and the two stators. Each of the two stators includes a laminated piezoelectric body. And, the tension of the wires is used to apply a preload between each rotor and the stator. The preload refers to a force that presses the rotor toward the stator. Therefore, when an AC voltage is applied to vibrate the piezoelectric body, the stator including the vibrating piezoelectric body vibrates, and the rotor is rotated by the vibration. [0004] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00B25J19/00
CPCH01L41/092H02N2/106B25J17/0258H02N2/108H10N30/2027Y10S901/19
Inventor 岩田来铃木昭宏
Owner TOYOTA IND CORP