50results about How to "High electromechanical coupling efficiency" patented technology

The invention discloses a composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator, and belongs to the technical field of piezoelectric ultrasonic motors. The vibrator solves the problem that the output thrust of a motor is affected by inconsistent vibration properties of two driving feet of the conventional flexural vibration modal beam type linear ultrasonic motor vibrator. Eight flexural vibration piezoelectric ceramic chips are sleeved on a stud of the vibrator, two end covers are respectively screwed at two ends of the stud to compact the eight flexural vibration piezoelectric ceramic chips, an electrode plate is respectively arranged between the adjacent flexural vibration piezoelectric ceramic chips and between the contact faces of the flexural vibration piezoelectric ceramic chip and the big end face of the end cover, insulating bushes are arranged between the contact faces of all the flexural vibration piezoelectric ceramic chips and the stud and between the contact faces of all the electrode plates and the stud, two thin-wall beams are symmetrically arranged at two sides of the big end face of each end cover, a mounting seat is fixed at the outer side of each thin-wall beam, a driving foot is arranged on the small end face of each end cover, and the driving feet are blocks, the sections of which are in the same shape as the small end faces. The vibrator is suitable for an ultrasonic motor.

The invention discloses a flexural vibration sandwiched energy converter-typed round disc stator and an ultrasonic motor to which the stator is applied, and relates to the ultrasonic motor field. The invention solves the problem in the existing ultrasonic motor, that mechanical output capacity is restrained due to the adoption of elastic metal body stuck on piezoelectric ceramic pieces for excitation. Even flexural vibration sandwiched energy converters of the stator are symmetrically arrayed and fixed between a round disc at the upper end and a round disc at the lower end; both the front endcover and the back end cover of the sandwiched energy converter are a quadrangular with a rectangle cross section narrowing down gradually, the small end faces of the front end cover and the back endcover are fixedly connected with the upper round disc and the lower round disc; two pairs of piezoelectric ceramic pieces are respectively and fixed between the front end cover, the back end cover and the flange. A rotor with a shaft and a rotor without a shaft in the ultrasonic motor both take the shape of a round disc and are embedded respectively from the top and the bottom of a stator cylinder, a wearable cushion is fixed at the end face, contacting the round disc, of the rotor and the stator is fixed to a base through the flange on the energy converter. The flexural vibration sandwiched energy converter-typed round disc stator and the ultrasonic motor of the invention are applicable to the manufacturing field of the ultrasonic motors.

The invention discloses a longitudinal-flexural-combined single-foot two-degree-of-freedom ultrasonic motor vibrator, belonging to the technical field of piezoelectric ultrasonic motors, and solving the problem that an existing longitudinal-flexural-combined ultrasonic motor vibrator difficultly realizes planar two-degree-of-freedom drive. The longitudinal-flexural-combined single-foot two-degree-of-freedom ultrasonic motor vibrator comprises a middle beam, eight piezoelectric ceramic pieces and two rear end covers, wherein the eight piezoelectric ceramic pieces are all polarized along the thickness direction, in a direction from one rear end cover to the other rear end cover, the eight piezoelectric ceramic pieces are respectively a first piezoelectric ceramic piece to an eighth piezoelectric ceramic piece, the third, fourth, fifth and sixth piezoelectric ceramic pieces can be used for exciting the longitudinal vibration of the vibrator, and also can be used for exciting the flexural vibration of the vibrator in the horizontal direction, by controlling excitation signals applied to four longitudinal-flexural reuse electrode slices, switching between the two vibration modes can be conveniently realized, and thus drive output direction switching is realized. The longitudinal-flexural-combined single-foot two-degree-of-freedom ultrasonic motor vibrator is applied to the field of ultrasonic motor vibrator making.

The invention relates to a bending vibration sandwich transducer type cylindrical double rotor ultrasonic motor which relates to the technical field of piezoelectric ultrasonic motors. The ultrasonic motor solves the problem in an existing ultrasonic motor that the mechanical output ability is restricted and a single stator only can realize single movement output. The bending vibration sandwich transducer type cylindrical double rotor ultrasonic motor of the invention comprises a stator component, an inside rotor component, an outside rotor component, a bearing block, a bearing and a bearing pre-tightening end cap, wherein continuous comb-shaped driving gears are manufactured on the inner surface of a cylinder, an inside rotor with a shaft and an inside rotor without the shaft are truncated cone-shaped, thin ends of the inside rotor with the shaft and the inside rotor without the shaft are respectively inserted on and under the cylinder, an outside rotor with the shaft and an outside rotor without the shaft are respectively installed on and under the stator component, wear resistance bush rings are respectively fixed on the side surfaces of the outside rotor with the shaft and theoutside rotor without the shaft, which are contacted with a stator rear end cap, and the inside rotor with the shaft is connected with the bearing block in a rotary mode through the bearing. The bending vibration sandwich transducer type cylindrical double rotor ultrasonic motor can be applied in the manufacture field of ultrasonic motors.

The invention relates to a longitudinal and bending composite mode sandwich two-foot ultrasonic linear motor oscillator with an elastic support, and relates to the technical field of piezoelectric ultrasonic motors. The problems that the traditional ultrasonic motor oscillator has insufficient vibrational energy utilization and restricted mechanical output capability are solved. The oscillator comprises two end covers, two pairs of longitudinal vibration piezoelectric ceramic chips, two pairs of bending vibration piezoelectric ceramic chips, a stud, four mounting seats, four thin-walled beams, an insulating sleeve, nine electrode chips and two friction plates, wherein the end cover is a tapered quadrangular prism body with a rectangular section, the small end surface of the end cover is used as a driving foot, the friction plates are fixed in through grooves of the small end surfaces of the end covers, and the end covers are respectively screwed on the two end parts of the studs through threaded holes on the large end surfaces of the end covers, so that the bending vibration piezoelectric ceramic chips and the longitudinal vibration piezoelectric ceramic chips are tightly pressed between the two end covers. The invention can be applied to the field of ultrasonic motor production.