5 results about "Ultrasonic motor" patented technology

The invention relates to an intravascular three-dimensional imaging device for piezoelectric driving scanning, and belongs to the technical field of intravascular interventional imaging. The device comprises an imaging conduit and a spiral ultrasonic motor, wherein the spiral ultrasonic motor drives the imaging conduit to do spiral motion; the imaging conduit comprises a miniature ultrasonic probe, a probe base, a torque spring and a metal matching tube; and the spiral ultrasonic motor comprises a plastic shell, a plastic cover, a metal column, a stator, a rotor, a spring and a nut. The driving device is miniaturized and light, can be held by hand and has no electromagnetic interference, and the imaging signal-to-noise ratio of the system is improved.

The utility model relates to a fast response device of an ultrasonic motor, which is suitable for the industrial field. The ultrasonic motor quick response device is composed of a feeding box, an inclined pipe, a vertical pipe, a receiving box and a three-way pipe, all of which are made of transparent organic glass. The inner diameter of the inclined pipe and the vertical pipe is 30mm. The bracket is made of stainless steel. Angle adjustable. The circuit is composed of a detection driving circuit, an amplification and conditioning circuit, and a three-stage voltage stabilizing circuit. It can quickly identify and sort out black and white balls, with compact circuit structure, small size, stable operation, high accuracy, low power consumption, and good anti-interference and reliability.

The invention discloses a linear ultrasonic motor and a constant pre-pressure applying method thereof. The motor comprises a base, a stator, a sliding block, a first positioning column, a second positioning column, a first rotating shaft, a second rotating shaft, a third rotating shaft, a guide cylinder, a threaded push rod, a spring and a rotating head. The threaded push rod comprises a screw rodand a polished rod which are coaxially and fixedly connected in sequence; the screw rod is in threaded connection with the rotating head; the polished rod is in clearance fit with the inner wall of the guide cylinder; and the spring is arranged in the guide cylinder and abuts against the closed end of the guide cylinder and the polished rod . The first positioning column is rotationally connectedwith the rotating head; the closed end of the guide cylinder is rotationally connected with one clamping end of the stator; the second positioning column is rotationally connected with the other clamping end of the stator; a driving foot of the stator abuts against the sliding block. The quasi-zero static stiffness characteristic can be achieved, and the pre-pressure of the linear ultrasonic motor is kept constant, so that the stability of the motor in the operation process is guaranteed, and the influence of machining errors of the motor, abrasion caused by operation of the motor and the like on the pre-pressure can be eliminated.

The invention discloses a stepping ultrasonic motor and a control method thereof. The stepping ultrasonic motor comprises a motor shaft, a motor base, a stator, a rotor and a preloading device for applying pre-pressure to the rotor, wherein the motor base, the stator, the rotor and the preloading device successively sleeve the motor shaft. The motor shaft is rotationally connected to the motor base and is fixedly connected to the preloading device. The stator includes an elastic body and a piezoelectric ceramic piece disposed on the lower surface of the elastic body and used for exciting standing-wave vibration. At least two electrodes are disposed on the lower surface of the piezoelectric ceramic piece. The rotor is provided with at least one contact tooth, and is in contact with the upper surface of the elastic body through the contact tooth. Since the electrodes are controlled to be energized in different ways, the step angle of the rotor is reduced. Since the motor shaft successively passes through the motor base, the stator, the rotor, and the preloading device, the stepping ultrasonic motor has not only high stepping precision but also high torque output performance.