公开(公告)号：US20240372487A1

公开(公告)日：2024-11-07

申请号：US18772773

申请日：2024-07-15

Applicant: NIKON CORPORATION

Inventor： Takatoshi ASHIZAWA

IPC: H02N2/12 ,  H02N2/16 ,  H10N30/20

Abstract: A lens barrel includes an element displaced by application of voltage; an elastic body having a contact surface coming into contact with the element, a drive surface to produce a vibration wave by displacement of the element, and a plurality of grooves; a moving element come into contact with the drive surface and rotated by the vibration wave; an annular ring rotated by rotating of the moving element; and a lens moved in an optical axis direction by rotating of the annular ring; wherein the element mainly contains a material having potassium sodium niobate, potassium niobate, sodium niobate, or barium titanate, wherein a value of [(T/B)÷W] is in a range of 0.84 to 1.94, where T represents a depth of the groove, B represents a distance from a bottom part of the groove to the contact surface, and W represents a radial width of the elastic body.

公开(公告)号：US20240210891A1

公开(公告)日：2024-06-27

申请号：US18528966

申请日：2023-12-05

Applicant: The Swatch Group Research and Development Ltd

Inventor： Mohammad Hussein KAHROBAIYAN ,  Yvan FERRI ,  Alexandre DIDIER ,  Lionel PARATTE ,  Jean-Jacques BORN

IPC: G04C3/12 ,  F16C11/12 ,  H02N2/12

CPC classification number: G04C3/12 ,  F16C11/12 ,  H02N2/123

Abstract: A piezoelectric resonator, in particular for a rotary piezoelectric motor, the resonator including a stationary base and an oscillating mass extending around a longitudinal axis, the oscillating mass being provided with at least one flyweight, preferably two opposing flyweights, wherein the resonator includes a flexible guide connecting the oscillating mass to the base, so as to be able to cause the oscillating mass to oscillate about a centre of rotation in a pendulum movement, the flexible guide comprising at least a first flexible blade connecting the base to the oscillating mass, the first flexible blade comprising at least in part an electrically actuatable piezoelectric material for deforming the first flexible blade and causing the oscillating mass to oscillate.

公开(公告)号：US11811334B2

公开(公告)日：2023-11-07

申请号：US17234560

申请日：2021-04-19

Applicant: C-Motive Technologies, Inc.

Inventor： Justin Kyle Reed ,  Baoyun Ge ,  Daniel Colin Ludois ,  Aditya Nandakumar Ghule

IPC: H02N2/14 ,  H02N1/00 ,  H02N2/12

CPC classification number: H02N1/006 ,  H02N1/002 ,  H02N1/004 ,  H02N2/12 ,  H02N2/14

Abstract: An electrostatic machine including a rotor plate comprising a plurality of rotor electrodes, and rotatably fixed to a shaft; a stator plate comprising a plurality of stator electrodes; an excitation circuit electrically coupled to at least one of the rotor plate or the stator plate at a first end, and electrically couplable to exchange power at a second end with a selected one of an electrical power source or an electrical load; wherein the excitation circuit is configured to: in a first motoring mode, provide excitation power to at least one of the rotor plate or the stator plate, wherein the shaft provides positive torque to the load; and in a second generating mode, wherein the shaft receives negative torque from the load, operably couple at least one of the rotor plate or the stator plate to the electrical power source.

公开(公告)号：US11764705B2

公开(公告)日：2023-09-19

申请号：US17863907

申请日：2022-07-13

Applicant: NUAA Super Control Technology Co., Ltd. ,  Nanjing University of Aeronautics and Astronautics

Inventor： Lin Yang ,  Mojian Yang ,  Chunsheng Zhao

IPC: H02N2/12 ,  H02N2/00 ,  H02N2/14 ,  H02N2/16

CPC classification number: H02N2/12 ,  H02N2/0065 ,  H02N2/142 ,  H02N2/163

Abstract: A high-torque and high-precision ultrasonic motor with a self-protection function and an implementation mode of the high-torque and high-precision ultrasonic motor are provided. In the device, a gasket encloses an output shaft of an ultrasonic motor body. A harmonic reducer encloses a shell of the ultrasonic motor body. A motor shaft penetrates through the ultrasonic motor body. The end, close to the motor shaft, of the ultrasonic motor body is defined as a top end, and the bottom end of the motor shaft is sequentially enclosed with an encoder support and a high-precision encoder assembly. The gasket, the harmonic reducer, the encoder support and the high-precision encoder assembly are sequentially arranged from the ultrasonic motor body to the bottom end of the motor shaft. After the ultrasonic motor body decelerates and increases torque, the motor shaft outputs rotating speed and torque.

公开(公告)号：US11742779B2

公开(公告)日：2023-08-29

申请号：US17141193

申请日：2021-01-04

Applicant: C-Motive Technologies, Inc.

Inventor： Justin Kyle Reed ,  Ryan Knippel ,  William D. Butrymowicz ,  Graham T. Reitz ,  Matthew Maroon ,  Baoyun Ge ,  Daniel Colin Ludois ,  Aditya Nandakumar Ghule ,  Serge Kuro ,  Kevin Frankforter

IPC: H02N1/00 ,  H02N2/12

CPC classification number: H02N1/006 ,  H02N1/002 ,  H02N1/004 ,  H02N2/12

Abstract: An example electrostatic machine includes a number of stator plates, each having a stator electrode and rotationally fixed to a housing, a shaft at least partially defined within the housing and configured to rotate about an axis, and a number of rotor plates, each having a rotor electrode and rotational fixed to the shaft. The electrostatic machine includes a dielectric fluid disposed in the housing, and that fills a gap between the stator plates and the rotor plates. The electrostatic machine includes a seal associated with the shaft, where the seal includes a material compatible with the dielectric fluid.

公开(公告)号：US11711033B2

公开(公告)日：2023-07-25

申请号：US17601971

申请日：2020-04-22

Applicant: TELEMAQ SAS

Inventor： Jean-Denis Sauzade ,  Florian Gourlay

IPC: H02N2/16 ,  H02N2/12 ,  H02N2/14

CPC classification number: H02N2/163 ,  H02N2/123 ,  H02N2/142

Abstract: The invention relates to a piezoelectric motor with bending travelling wave, comprising a rotary shaft (4) connected to a rotor (3), a piezoelectric element (2) attached to a vibrating stator (1), and a decoupling web (5) for attaching the vibrating stator to a mounting (7). The mounting (7) is mechanically connected to a base (9) by means of at least one deformable element (10) and at least one piezoelectric actuator (11), so that the support can be deformed angularly relative to the base in order to rotate the shaft when the vibrating stator is no longer electrically powered. The motor is particularly suitable for applications that require micrometre or nanometre accuracies, for example in positioning tools in industrial processes, precise medical robotics or optical applications.

公开(公告)号：US20230198429A1

公开(公告)日：2023-06-22

申请号：US18074886

申请日：2022-12-05

Applicant: The Swatch Group Research and Development Ltd

Inventor： Jean-Jacques BORN ,  Yvan Ferri ,  Alexandre Didier ,  Lionel Paratte ,  Léonard Testori

IPC: H02N2/10 ,  H02N2/12 ,  G04C3/12

CPC classification number: H02N2/103 ,  H02N2/123 ,  G04C3/12

Abstract: A rotary piezoelectric motor (1), in particular for a timepiece, including a rotor (3) configured to rotate and actuate a mechanical device, and a stator (2) configured to rotate the rotor (3), the stator (2) including a piezoelectric actuator provided with a resonator (29) arranged to perform an oscillatory motion, and a fixed element (4). The resonator in a movable element (5) arranged at a distance from the fixed element (4) and connected to the fixed element (4), the piezoelectric actuator being configured to move the movable element (5) against the rotor (3) to make it rotate, the movement of the movable element (5) making the rotor (3) rotate in a first direction.

公开(公告)号：US20230031934A1

公开(公告)日：2023-02-02

申请号：US17860006

申请日：2022-07-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuki Oda ,  Satoshi Tsuchiya

IPC: H01L41/09 ,  H01L41/053 ,  H02N2/12 ,  H02N2/10

Abstract: A vibrating actuator includes a contact body and a vibrating body that vibrates, has an energy conversion element, and has an elastic body in contact with the contact body to move relative to each other from the vibration. The contact body has a base part, a thin plate part, a support part, and a friction member. The thin plate part extends from the base part toward an annular center axis of the base part and the support part is disposed at an end of the thin plate part. The friction member is disposed to the support part as a member separate from the support part and in contact with the elastic body. Density of the friction member is higher than density of the thin plate part. A weight ratio of the thin plate part to a total weight of the friction member and the support part is 0.5 to 1.5.

公开(公告)号：US11533004B2

公开(公告)日：2022-12-20

申请号：US16953271

申请日：2020-11-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Donghyun Hwang ,  Byeongkyu Lim

IPC: H02N2/10 ,  H02N2/12

Abstract: The present disclosure provides a rotary motor, which includes: a clamping member having a gripping unit installed at an inner circumference of a rotor to grip the rotor during a predetermined time; and a driving member installed at the inner circumference of the rotor and having a rotation unit configured to make an elastic deformation to rotate by a predetermined angle and then return to an original state so that the rotor is rotated.

公开(公告)号：US20220209687A1

公开(公告)日：2022-06-30

申请号：US17601971

申请日：2020-04-22

Applicant: TELEMAQ SAS

Inventor： Jean-Denis Sauzade ,  Florian Gourlay

IPC: H02N2/16 ,  H02N2/12 ,  H02N2/14

Abstract: The invention relates to a piezoelectric motor with bending travelling wave, comprising a rotary shaft (4) connected to a rotor (3), a piezoelectric element (2) attached to a vibrating stator (1), and a decoupling web (5) for attaching the vibrating stator to a mounting (7). The mounting (7) is mechanically connected to a base (9) by means of at least one deformable element (10) and at least one piezoelectric actuator (11), so that the support can be deformed angularly relative to the base in order to rotate the shaft when the vibrating stator is no longer electrically powered. The motor is particularly suitable for applications that require micrometre or nanometre accuracies, for example in positioning tools in industrial processes, precise medical robotics or optical applications.