40results about How to "Improve mechanical output characteristics" patented technology

The invention relates to a diamond-shaped hinge oblique-pulling quadratured driving type piezoelectric stick-slip linear motor and a recombination excitation method thereof, aims to solve the problem that the output mechanical property of the current piezoelectric stick-slip linear motor is limited caused by difficulty in comprehensive control on a friction force. The piezoelectric stick-slip linear motor comprises a pre-tightening force adjustment device, an oblique-pulling stator and a rotor, wherein the oblique-pulling stator generates lateral displacement by an oblique-pulling diamond-shaped movement converter, the friction driving force is increased, and the friction resistance is reduced; and meanwhile, a friction control wave is combined and superposed to a sawtooth driving wave in a rapid deformation stage of the oblique-pulling stator, so that the friction resistance between the stator and the rotor in the rapid deformation stage is reduced, the comprehensive control on the friction force is achieved, and the mechanical output property of the piezoelectric stick-slip linear motor is improved. The piezoelectric stick-slip linear motor has the characteristics of compact structure, high precision, large stroke and the like, and has favorable application prospect in the fields with miniature structures, high positioning accuracy requirements and the like such as semiconductor processing and optical focusing.

The invention provides a precise piezoelectric stick-slip linear motor with an asymmetric structure and a driving method thereof, and aims at solving the problem that mechanical output characteristics of an existing piezoelectric stick-slip linear motor are limited due to the fact that comprehensive regulation of friction is difficult and other problems. The precise piezoelectric stick-slip linear motor is composed of a fixed support, a loading mechanism, a stator and a rotor, and lateral displacement of the stator is produced by means of an asymmetric flexible hinge structure, so that friction driving force is increased, and friction resistance is reduced; meanwhile, a friction regulation wave is complexly superimposed in a sawtooth driving wave in the rapid deformation stage of the stator, therefore, the friction resistance between the stator and the rotor in the rapid deformation stage is reduced, comprehensive regulation of the friction is achieved, and the mechanical output characteristics of the piezoelectric stick-slip linear motor are significantly improved. The precise piezoelectric stick-slip linear motor with the asymmetric structure has the advantages of being simple in structure, high in precision, large in stroke and the like and has good application prospects in the fields of micro-nano precision driving and positioning of aerospace, optical precision instruments, semiconductor machining and the like.

The invention provides an oblique-pulling rhombic amplification piezoelectric stick-slip linear motor and an excitation method thereof, and aims to solve the problem of an existing piezoelectric stick-slip linear motor that the output mechanism performance is limited by difficult comprehensive regulation and control of frictional forces. The oblique-pulling rhombic amplification piezoelectric stick-slip linear motor is composed of a pre-compression device, an oblique-pulling stator and a mover. An oblique-pulling rhombic movement conversion mechanism of the stator has a micro-displacement amplification function, and the distribution of the axial rigidity is uneven and a lateral displacement is generated, so that the friction driving force is increased, and the friction resistance is reduced; in addition, friction regulation and control waves are superposed to sawtooth driving waves in a coupled manner in a rapid deformation driving phase of the oblique-pulling stator, so that the friction resistance between the stator and the mover in the rapid deformation driving phase is reduced, the comprehensive regulation and control of the frictional forces is realized, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is improved. According to the invention, the oblique-pulling rhombic amplification piezoelectric stick-slip linear motor has the advantages that the structure is compact, the assembling is convenient, the positioning precision is high, and the stroke is not limited, so that the oblique-pulling rhombic amplification piezoelectric stick-slip linear motor can be widely applied to the technical field of micro-nano precise driving and positioning such as precise optical instruments.

The invention discloses a rhombic hinge shifting piece type orthogonal driving type piezoelectric stick-slip linear motor and a composite excitation method therefor, and solves the problem that the output mechanical performance of the current piezoelectric stick-slip linear motor is limited caused by difficulty in comprehensive regulation and control on the friction force. The piezoelectric stick-slip linear motor comprises three parts: a pre-tightening force regulating apparatus, a shifting piece type stator and a mover, wherein the shifting piece type stator generates side displacement by a shifting piece type rhombic movement converter to increase the friction driving force and decrease the friction resistance; meanwhile, the friction regulation and control wave is coupled and overlapped to the sawtooth driving wave in the rapid deformation stage of the shifting piece type stator so as to reduce the friction resistance between the stator and the mover in the rapid deformation stage; and therefore, the comprehensive regulation and control on the friction force is realized, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is remarkably improved. The piezoelectric stick-slip linear motor has the characteristics of simple structure, high precision, long journey and the like, and can be widely applied to the advanced technical fields of semiconductor processing, optical precision optical instrument, and the like.

The invention discloses a slanted-slot type diamond amplification mechanism piezoelectric stick-slip linear motor and an excitation method thereof. The problem that the output mechanical property is limited since the current piezoelectric stick-slip linear motor is difficult in friction force comprehensive regulation is solved. The motor comprises a pre-loading mechanism, a slanted-slot type stator and a rotor; the slanted-slot type diamond movement conversion mechanism set by the slanted-slot type stator can realize the displacement amplification, and is capable of increasing the friction drive force and reducing the friction resistance since the non-uniform axial rigidity distribution thereof produces the lateral displacement; and meanwhile, the friction regulation wave is coupled and overlapped to the sawtooth drive wave of the slanted-slot type stator at the fast deformation drive stage, thereby reducing the friction resistance between the stator and the rotor at the fast deformation drive stage, implementing the comprehensive regulation on the friction force, and obviously promoting the mechanical output feature of the piezoelectric stick-slip linear motor. The motor disclosed by the invention has the advantages of being compact in structure, convenient for controlling, high in positioning precision and unlimited in travel, so that the motor can be well applied to the precise optical instruments and like micro-nano precise drive and positioning technical field.

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 relates to a wedge type diamond-shaped amplification mechanism piezoelectric stick-slip linear motor and excitation method thereof, aims to solve the problem that the output mechanical property of the current piezoelectric stick-slip linear motor is limited caused by difficulty in comprehensive control on a friction force. The piezoelectric stick-slip linear motor comprises a pre-stress adjustment device, a wedge type stator and a rotor, wherein a wedge-type diamond-shaped movement conversion mechanism of the stator has a function of micro-movement amplification, the axial rigidity of the wedge-type diamond-shaped movement conversion mechanism is not uniform in distribution, lateral displacement is generated, the friction driving force also can be increased, and the friction resistance is reduced; and meanwhile, a friction control wave is coupled and superposed to a sawtooth driving wave in a rapid deformation driving stage of the wedge-shaped stator, the friction resistance between the stator and the rotor in the rapid deformation stage is reduced, the comprehensive control on the friction force is achieved, and the mechanical output property of the piezoelectric stick-slip linear motor is improved. The piezoelectric stick-slip linear motor has the advantages of simple and compact structure, high positioning precision, large stroke and the like, is easy to assemble and convenient to control, and can be widely applied to the technical field of micro-nano precision driving and positioning such as semiconductor processing.

Provided are an oblique-trapezoid orthogonal driving type piezoelectric stick-slip linear motor and a compound excitation method thereof. The problem that for a current piezoelectric stick-slip linear motor, due to the fact that comprehensive regulation of friction force is difficult, the mechanical output characteristic is degraded is solved. The motor is composed of a loading device, a stator and a rotor; the stator utilizes an oblique-trapezoid motion converter to produce lateral displacement, friction drive force is increased, and frictional resistance is reduced; meanwhile, a friction regulation wave is compositely overlaid in a sawtooth drive wave in the rapid deformation stage of the stator, the frictional resistance between the staror and the rotor in the rapid deformation stage is reduced, comprehensive regulation of the friction force is achieved, and the mechanical output characteristic of the linear piezoelectric motor is significantly improved. The oblique-trapezoid orthogonal driving type piezoelectric stick-slip linear motor has the advantages of being simple in structure, high in precision, large in stroke and the like, and an excellent application prospect in the fields such as semiconductor processing and optical focusing which achieve miniaturization of the structure and require accurate positioning is achieved.

The invention discloses a double-stator fixed piezoelectric inertial actuator and a drive method therefor to solve the technical problems of small output thrust, small stroke and low precision due tothe fact that single stator drive is adopted by an existing piezoelectric stick-slip linear motor. The double-stator fixed piezoelectric inertial actuator comprises oblique-pull stator assemblies, a rotor assembly, a sliding boss, a micro-displacement adjuster and a base. The oblique-pull stator assemblies adjust the positive contact pressure between the oblique-pull stator assemblies and the rotor assembly through generating lateral displacement to achieve comprehensive adjustment and control on the frictional force; and meanwhile, the oblique-pull stator assemblies are excited through different asymmetric electrical signal combinations, so that multiple drive modes, such as an output enhancement drive mode and a moving crashstop drive mode can be achieved. The double-stator fixed piezoelectric inertial actuator has the characteristics of being simple in structure, high in load capacity and stable in movement, and has a good application prospect in the field of micro-nano precision driving and positioning, such as optical precision instrument and semiconductor processing.

The invention provides a rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor and a composite excitation method thereof to solve the problem that in an existing piezoelectric stick-slip linear motor, the mechanical output property is limited due to the fact that comprehensive regulation on friction force is difficult. The rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor is composed of an oblique-wedge stator, a preloading device, a mounting support and a rotor; the oblique-wedge stator adopts asymmetrical hinges of a wedged structure, lateral displacement is generated through an oblique-wedge rhombus motion converter and the ununiform axial rigidity distribution characteristic of a stator drive foot, the friction drive force is increased, and the friction resistance is decreased; meanwhile, friction regulation waves are overlapped into sawtooth drive waves in the rapid deformation stage of the stator, comprehensive regulation on the friction force is achieved, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is significantly promoted. The rhombus oblique-wedge quadratured drive type piezoelectric stick-slip linear motor has the advantages of being simple in structure, high in precision, large in stroke and the like and has the good application prospect in the fields of micro-nano precise driving and positioning such as machining of precise medical instruments, optical precise instruments and semiconductors.

The invention discloses a rhombic hinge skewed slot type orthogonal driving type piezoelectric stick-slip linear motor and a composite excitation method therefor, and solves the problem that the output mechanical performance of the current piezoelectric stick-slip linear motor is limited caused by difficulty in comprehensive regulation and control on the friction force, and the like. The piezoelectric stick-slip linear motor comprises a pre-tightening force regulating apparatus, a stator and a mover, wherein the stator generates side displacement by a skewed slot type rhombic movement converter, so that the friction driving force is increased while the friction resistance is decreased; the mover driving is achieved by the generated side displacement through a driving foot; meanwhile, the friction regulation and control wave is coupled and overlapped to the sawtooth driving wave in the rapid deformation stage of the stator so as to reduce the friction resistance between the stator and the mover in the rapid deformation stage; and therefore, the displacement band-returning rate is lowered, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is remarkably improved. The piezoelectric stick-slip linear motor has the advantages of compact structure, simple control, high positioning precision and the like, and can be widely applied to the advanced technical fields of semiconductor processing, optical precision instrument, and the like.

The invention discloses a piezoelectric stick-slip motor using an H-shaped structure and a driving method thereof, which can solves the technical problems that the current piezoelectric stick-slip displacement platforms are complicated in structure, are unstable in the force applied to a guide rail, and the pre-tightening force is inconveniently adjusted. The piezoelectric stick-slip motor includes a base, a guide rail, a drive stator, a guide rail mounting bolt, a loading mechanism, a thread pair, a drive stator mounting bolt, and a loading mechanism mounting bolt. The driving stator utilizesslow extension of stacked piezoelectric ceramics to drive the deformation of a flexible hinge, and reciprocating motion of the guide rail is realized by introducing sawtooth waves into a piezoelectric stack on the basis of the stick-slip principle. The piezoelectric stick-slip motor has the characteristics of simple structure, high stability and large stroke, and has good application prospect inthe field of micro-nano drive and positioning such as optical precise instruments and semiconductor processing.