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 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 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.

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 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.