52results about How to "Increased frictional driving force" 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.