Composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator
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A linear ultrasonic motor, sandwich-type technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of inconsistent vibration characteristics and affecting the output thrust of the motor, etc. Achieve the effect of flexible design, simple structure and improved mechanical output characteristics
Active Publication Date: 2014-06-04
HARBIN INST OF TECH
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Problems solved by technology
[0004] In order to solve the problem that the vibration characteristics of the two driving feet of the existing bending vibration mode beam type linear ultrasonic motor vibrator are inconsistent and affect the output thrust of the motor, a composite bending vibration sandwich type biped linear ultrasonic motor vibrator is provided
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specific Embodiment approach 1
[0025] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the composite bending vibration sandwich type biped linear ultrasonic motor vibrator in this embodiment, it includes two driving feet 1-1, two end caps 1, four thin-walled beams 2, four mounting seats 3, eight Sheet bending vibration piezoelectric ceramic sheet 4, stud 5, insulating sleeve 6 and nine electrode sheets 7,
[0026] Eight pieces of bending vibration piezoelectric ceramic sheets 4 are set on the stud 5,
[0027] The end cap 1 is a block with a square or circular cross-section and tapering. There is a blind hole with an internal thread in the center of the large end surface of the end cap 1. The two end caps 1 are respectively screwed on the stud 5. At both ends, press eight bending-vibration piezoelectric ceramic sheets 4 tightly,
[0028] A piece of electrode sheet 7 is respectively arranged between the adjacent bending vibration piezoelectric cer...
specific Embodiment approach 2
[0034] Specific implementation mode two: the following combination figure 2 Describe this embodiment, this embodiment is a further description of Embodiment 1, this embodiment also includes two friction plates 8,
[0035] The output coupling side of each driving foot 1 - 1 is provided with a rectangular groove, and a friction plate 8 is arranged in the rectangular groove.
specific Embodiment approach 3
[0036] Embodiment 3: This embodiment is a further description of Embodiment 1 or 2. The cross-section of the bending vibration piezoelectric ceramic sheet 4 in this embodiment is square or circular.
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Abstract
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.
Description
technical field [0001] The invention relates to a compound bending vibration sandwich type biped linear ultrasonic motor vibrator, which belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor. It has the advantages of low speed and high torque, no need for a speed change mechanism, no electromagnetic interference, fast response, and self-locking when power is off. [0003] Sandwich Ultrasonic Motor Using Piezoelectric Ceramics with High ...
Claims
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