公开(公告)号：US20230240144A1

公开(公告)日：2023-07-27

申请号：US18194775

申请日：2023-04-03

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toshiaki YAMASHITA ,  Tsuguji KAMBAYASHI ,  Hideaki KASHIURA ,  Hiroshi ASANO

IPC: H10N30/20 ,  H10N30/87 ,  B06B1/06

CPC classification number: H10N30/20 ,  H10N30/87 ,  B06B1/06

Abstract: An ultrasonic motor is provided with increased torque without an increase in size. The ultrasonic motor includes a stator having a plate-shaped vibrating body including first and second main surfaces and a piezoelectric element on the first main surface; and a rotor in contact with the second main surface. The piezoelectric element is disposed along a circumferential direction of a traveling wave so as to generate the traveling wave circulating around an axial direction Z by vibrating the vibrating body. The piezoelectric element vibrates the vibrating body in a vibration mode including a nodal line extending in the circumferential direction. A mass addition portion is provided along the circumferential direction on at least one of the first and second main surfaces of the vibrating body 3, and the mass addition portion is located outside the nodal line in a direction perpendicular to the axial direction Z.

公开(公告)号：US20230364645A1

公开(公告)日：2023-11-16

申请号：US18358436

申请日：2023-07-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tsuguji KAMBAYASHI ,  Hiroshi ASANO ,  Hideaki KASHIURA

IPC: B06B1/06 ,  H02N2/10 ,  H02N2/12

CPC classification number: B06B1/0644 ,  H02N2/103 ,  H02N2/12

Abstract: A device may include a stator including a vibrating body in a plate shape having a first principal surface and a second principal surface opposed to each other, and including a piezoelectric device provided on the first principal surface of the vibrating body. A device may include a rotor directly or indirectly in contact with the second principal surface of the vibrating body. A device may include a spring in a plate shape having an opening and configured to give elastic force to the rotor in a direction from a side of the rotor to a side of the stator. A device may include a shaft inserted into the opening of the spring and having a mating portion, wherein. A device may include a shape of the opening of the spring is a noncircular shape in a plan view.

公开(公告)号：US20220263433A1

公开(公告)日：2022-08-18

申请号：US17661439

申请日：2022-04-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tsuguji KAMBAYASHI ,  Toshiaki YAMASHITA

IPC: H02N2/16

Abstract: An ultrasonic motor is provided that includes a stator including first and second piezoelectric elements provided on a first main surface of a vibrator having a plate shape, a rotor in direct or indirect contact with a second main surface of the vibrator, and a wiring member connected to the first and second piezoelectric elements. Moreover, the wiring member includes first and second connection members connected to the first and second piezoelectric elements, a central wiring portion connected to the first and second connection members and provided in a region including a center of an axial direction, and an extended wiring portion connected to the central wiring portion. The central wiring portion is fixed to the first main surface of the vibrator and the extended wiring portion is lifted from the first main surface of the vibrator.

公开(公告)号：US20220263431A1

公开(公告)日：2022-08-18

申请号：US17661451

申请日：2022-04-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toshiaki YAMASHITA ,  Tsuguji KAMBAYASHI

IPC: H02N2/10 ,  H02N2/00 ,  H02N2/12

Abstract: An ultrasonic motor is provided that includes a stator having a vibrator and first to fourth piezoelectric elements, a rotor, and a wiring member including an insulating substrate and first and second wirings. The piezoelectric elements are dispersedly arranged along the circumferential direction of a traveling wave circulating around an axial direction so that the traveling wave is generated by the vibrator being vibrated. The first and third piezoelectric elements face each other across the center of a traveling wave. The first wiring is electrically connected to the first and third piezoelectric elements, and the second wiring is electrically connected to the second and fourth piezoelectric elements. The second wiring passes over the third piezoelectric element from the second piezoelectric element side and extends toward the side of fourth piezoelectric element.