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：US20240223109A1

公开(公告)日：2024-07-04

申请号：US18603443

申请日：2024-03-13

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Akari HASHIMOTO ,  Hideaki KASHIURA

IPC: H02N2/00 ,  H02N2/10

CPC classification number: H02N2/0055 ,  H02N2/103

Abstract: An ultrasonic motor that includes a case having a first case member having a plate shape portion including a first main surface and a second main surface and a side surface connecting the first main surface and the second main surface; a first bearing portion attached to the first case member and that supports the shaft; a second case member disposed on a second main surface side of the first case member, and having a cup shape portion including a bottom portion and a side wall portion, wherein the side wall portion has a plurality of support portions that protrude toward an inside of the case and support the second main surface of the first case member, and a plurality of fixing portions that fix the first case member to the second case member; and a second bearing portion attached to the second case member and that supports the shaft.