52results about How to "Increased frictional driving force" patented technology

Provided are an oblique-trapezoid motion transfer type precise piezoelectric stick-slip linear motor and a driving 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 limited is solved. The motor is composed of a base, a pre-pressure adjustment device, an oblique-trapezoid stator and an oblique-trapezoid rotor, the stator adopts a symmetric flexible hinge structure to produce displacement amplification, lateral displacement is produced by means of nonuniform axial rigidity distribution of a semicircular drive foot, 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 motion transfer type precise 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 micro-nano precision driving and positioning fields such as aerospace, optical precision instruments and semiconductor processing is achieved.

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.

Provided are a slanted-slot type precise piezoelectric stick-slip linear motor and a driving 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 limited is solved. The motor is composed of a base, a pre-pressure adjustment mechanism, a slanted-slot type stator and a slanted-slot type rotor, the stator adopts a symmetric flexible hinge structure to produce displacement amplification, due to the fact that rigidity distribution of slanted slots and a semicircular drive foot in the axial direction is nonuniform, lateral displacement is produced, 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 piezoelectric stick-slip linear motor is significantly improved. The slanted-slot type precise 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 micro-nano precision driving and positioning fields such as aerospace, optical precision instruments and semiconductor processing is achieved.

The invention relates to an orthographic double-driving-type precise piezoelectric stick-slip linear motor and a driving method thereof. The technical problems are solved that since single-stator driving is adopted for an existing piezoelectric stick-slip linear motor, the output thrust is small, the stroke is short, and the precision is low. The motor comprises an inclined trapezoidal orthographic driving assembly, a rotor assembly, a base, a displacement adjuster, a dovetail platform and dovetail platform limit strips. The inclined trapezoidal orthographic driving assembly generates lateraldisplacement, the contact positive pressure between the inclined trapezoidal orthographic driving assembly and the rotor assembly is adjusted, and comprehensive regulation and control for the frictionforce are achieved; meanwhile, the inclined trapezoidal orthographic driving assembly is driven through different combinations of asymmetric electric signals, and multiple kinds of driving modes suchas output reinforcement type and motion emergent-stopping type can be achieved. The orthographic double-driving-type precise piezoelectric stick-slip linear motor has the advantages of large output thrust, high precision, long stroke and the like and has great application prospects in micro-nano precise driving and poisoning fields such as processing of optical precise instruments and semiconductors.

The invention, which belongs to the technical field of precision engineering, relates to an auxiliary supercharged piezoelectric stick-slip linear motor and an excitation method thereof. The auxiliarysupercharged piezoelectric stick-slip linear motor is composed of a fixed base, a moving platform, a stator assembly and a mover assembly. The fixed base and the stator assembly are connected by screws; the fixed base and the mover assembly are connected by screws; the moving platform and the mover assembly are connected by screws; and the stator assembly and the mover assembly are in contact cooperation. In addition, according to the excitation method, an auxiliary supercharged stator is excited; the friction driving force between the auxiliary supercharged stator and a mobile rail is increased and the frictional resistance between the auxiliary supercharged stator and the mobile rail is reduced; the friction force during the whole working process of the piezoelectric stick-slip linear motor is controlled; the output characteristic of the piezoelectric stick-slip linear motor is improved obviously; and the displacement back-off rate is reduced. The auxiliary supercharged piezoelectric stick-slip linear motor has advantages of simple structure, high precision and fast response speed. The auxiliary supercharged piezoelectric stick-slip linear motor and the excitation method thereofhave the broad application prospects in fields of precision engineering technology and the like.

The invention discloses a J-type structure precise piezoelectric stick-slip linear motor and a drive 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 is composed of four parts: a fixed base, a pre-pressure loading mechanism, a J-type structure stator and a rotor; the stator adopts a J-type hinge mechanism so that the axial rigidity distribution of the stator is non-uniform, the stator drive end is excited to produce the lateral displacement so as to increase the friction drive force and reduce the friction resistance; 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 stage, thereby reducing the friction resistance between the stator and the rotor at the fast deformation 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 features of being simple in structure, high in precision and large in travel, and has good application prospect in the aerospace aviation, optical precision instrument, semiconductor processing and like micro-nano precise driving and positioning field.

The invention discloses a parallel drive piezoelectric stick-slip linear motor 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 parallel drive piezoelectric stick-slip linear motor comprises oblique trapezoid drive assemblies, locking screws, a base, a dovetail platform displacement adjuster, a dovetail platform, dovetail platform limiting strips and a sliding assembly. The oblique trapezoid drive assemblies adjust the positive contact pressure between the oblique trapezoid drive assemblies and the sliding assembly through generating lateral displacement to achieve comprehensive adjustment and control on the frictional force; and meanwhile, the oblique trapezoid drive 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 parallel drive piezoelectric stick-slip linear motor has the characteristics of large output thrust, high precision and large stroke, andhas a good application prospect in the field of micro-nano precision driving and positioning, such as optical precision instrument and semiconductor processing.

The invention relates to a bi-directional micro-displacement large-scale precise piezoelectric stick-slip linear motor and driving method thereof, in order to solve the technical problems of small output thrust, short stroke, low precision and the like caused by adopting single stator driving. The invention comprises an asymmetrical driving component, a guide rail assembly, a sliding table, a pre-tightening force loader and a fixed platform. The said asymmetrical driving component adjusts the contact positive pressure between the asymmetrical driving component and the guide rail component by generating lateral displacement so as to realize the comprehensive regulation of the friction force; meanwhile, the invention drives the asymmetric driving component through the combination of different asymmetric electric signals so as to realize a plurality of driving modes such as an output reinforced type and a moving emergency stop type. The invention has the characteristics of simple structure, strong loading capacity, stable motion and the like, and has good application prospects in the field of micro-nano precise driving and positioning, such as optical manufacturing, semiconductor processing and the like.

The invention provides a single-spindle drive wheel disc false-twist spinning device. A rotation wheel disc serves as a false-twist element, and the outer periphery of the rotation wheel disc drives a sliver in a frication mode to rotate so that false twist is generated. The single-spindle drive wheel disc false-twist spinning device is characterized in that the downstream of a front roller jaw is provided with at least one false-twist wheel disc, the periphery of one of the false-twist wheel disc contacts a front upper roller or a front lower roller in a pressing mode, the surface of the front upper roller or the front lower roller drives the false-twist wheel disc to rotate in a friction mode, the included angle alpha is formed between the axis of the false-twist wheel disc and the axis of the rollers is alpha, a false-twist contacting section exists between the sliver output from the front jaw and the periphery of at least one of the false-twist wheel discs.

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 relates to a double-stator fixed precision piezoelectric stick-sliding linear motor and driving method thereof, in order to solve the technical problems of small output thrust, short stroke an low precision caused by adopting single stator driving. The invention comprises an inclined wedge-shaped stator, a double-guide rail type mover, a sliding lug boss, a loading device and a base.The said inclined wedge-shaped stator adjusts the contact positive pressure between the inclined wedge-shaped rotor and the double-guide-rail type rotor by generating lateral displacement so as to realize the comprehensive regulation of the friction force; meanwhile, the invention drives the inclined wedge-shaped stator by the combination of different asymmetrical electric signals, so that various driving modes such as the output reinforced type and the motion quenching type can be acheived. The invention has the characteristics of simple structure, strong loading capacity, stable motion andthe like, and has good application prospects in the field of micro-nano precise driving technology such as optical fiber optics, semiconductor processing and the like.

The invention discloses a piezoelectric stick-slip linear motor equipped with an inclined-ladder-shaped amplitude amplifying mechanism, and an excitation method for the piezoelectric stick-slip linear motor, 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 base, a pre-loading assembly, an inclined-ladder-shaped stator and a mover, wherein the inclined-ladder-shaped amplitude amplifying switching mechanism of the stator has a micro-displacement amplifying function, and lateral displacement can be generated due to the axial uneven rigidity distribution; meanwhile, the friction driving force is increased while the friction resistance is decreased; the friction regulation and control wave is coupled and overlapped to the sawtooth driving wave in the rapid deformation driving stage of the inclined-ladder-shaped stator so as to reduce the friction resistance between the stator and the mover in the rapid deformation driving 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 improved. The piezoelectric stick-slip linear motor has the characteristics of compact structure, convenience in assembling, high positioning precision, long journey and the like, and can be widely applied to semiconductor processing, and other micro-nano precision driving and positioning technical fields.

The invention discloses a piezoelectric stick-slip linear motor equipped with an asymmetric rhombic amplifying mechanism and an excitation method for the piezoelectric stick-slip linear motor, 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-pressure regulating apparatus, a stator and a mover, wherein the asymmetric rhombic amplifying conversion mechanism of the stator has a micro-displacement amplifying function; side displacement can be generated by the asymmetric structure; meanwhile, the friction driving force is increased while the friction resistance is decreased; the friction regulation and control wave is coupled and overlapped to the sawtooth driving wave in the rapid deformation driving stage of the stator so as to reduce the friction resistance between the stator and the mover in the rapid deformation driving 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 and compact structure, easy assembling, high precision, long journey and the like, and can be widely applied to the fields of precision optical instrument, semiconductor processing and other micro-nano precision driving and positioning technologies.

The invention provides a large load-bearing piezoelectric stick-slip rotating table using an asymmetric conversion hinge, and aims to solve the problems of complex hinge structure, small rotation range, weak bearing capacity and the like of the existing piezoelectric stick-slip rotating table. The large load-bearing piezoelectric stick-slip rotating table comprises a rotating table, a bearing, a supporting cylinder, a cylinder fixing bolt, a driving assembly fixing bolt, a driving assembly and a bottom table. The inner ring of the bearing is in interference-fit with the rotating table. The outer ring of the bearing is in interference-fit with the supporting cylinder. The driving assembly is fixedly installed on the bottom table through the driving assembly fixing bolt. The driving assemblyis in contact with the lower end of the rotating table. The supporting cylinder is fixedly installed on the bottom table through the cylinder fixing bolt. The used asymmetric conversion hinge has a central symmetric structure, and the asymmetric conversion hinge generates contraction oblique displacement to clamp the rotating table and generates torque to enable the rotating table to rotate due to uneven distribution of the hinge rigidity. The large load-bearing piezoelectric stick-slip rotating table has the characteristics of simple structure, large rotation range, high bearing capacity, high positioning accuracy and the like and has wide application prospects in the field of micro-nano precision driving and positioning.

Disclosed is an electric land wheel track car. The electric land wheel track car is characterized in that at least two or more rows of wheels fixed to the ground along the way or an overhead girder in parallel are adopted as a power driving device and a guiding device of a running car; the car is movably erected on the wheels, and rolling friction force between the edges of the wheels and the car is used for driving the car to move forwards. The car is started or accelerated or decelerated or stopped by controlling the rotating speed of the wheels along the sections of the way. The lower portion of the car is movably connected and located on a rotatable friction drive guiding block. The wheels are combined and divided into a plurality of sections along the way, and the adjacent wheels on the same row in each section are connected through mechanical transmission pieces and driven through a motor; the rotating state and speed of the wheels in front of and behind the vehicle are automatically controlled through a stroke switch; accordingly, forward acceleration operation or constant speed operation or reverse deceleration operation or braking of the wheels is achieved, and unmanned automatic operation of the vehicle is achieved.

The present invention provides a lifting driving device and a mechanical parking equipment having the lifting driving device. The lifting driving device can not raise a reacting force applied to a bearing even if the winding number of turns of a cable on a traction sheave is increased. The lifting driving device comprises: a diverting pulley (40) arranged opposite to a traction sheave (30) in a cable tension action direction (P) of the traction sheave (30); a support member (50) of which a base part (53) is freely rotatably supported on an output shaft (26) of a driving source (25), and a front end part (54) freely rotatably supports the diverting pulley (40); and a rotation preventing member (57) used for maintaining a relative position relation between the support member (50) and the driving source (25), wherein, the cable (21) is wound on the diverting pulley (40) after being wound on the traction sheave (30), then the cable (21) is wound on the traction sheave (30) again, therefore, the cable (21) is wound on the traction sheave (30) repeatedly.

A novel filament winding bobbin chuck comprises a disc body which is made from plastic into a disc shape, a central hole which is positioned at the center of the disc body and is used for installing a drive shaft, a contact end surface which is arranged on the disc body and is contacted with the end surface of a bobbin, and a columnar platform which is positioned on the contact end surface and is matched with the inner circle of the bobbin, wherein a metal layer wraps the outer surface of the columnar platform, and forms an uneven transmission part on the external peripheral surface of the columnar platform, bigger friction drive force can be generated between the transmission part and the bobbin, so the bobbin can operate more stably, meanwhile, the metal layer is not easy to be worn, so the filament winding bobbin chuck on a textile manufacturing machine has longer service life.

The invention relates to a rotating tyre traveling driving device of a tube mill cylinder body, which is suitable for a rotating tyre traveling driving device for carrying out subsequent machining and manufacturing on a well welded tube mill cylinder body integer. The rotating tyre traveling driving device comprises a frame, the front side of the frame is provided with a traveling driving device; the middle of the frame is provided with a roller wheel body assembly; the rear side of the frame is provided with a roller wheel driving device connected with the roller wheel body assembly; and the arranged traveling driving device can move conveniently. In the invention, the cylinder body rotating tyre traveling driving device and a supporting device of a cylinder body rotating tyre are separately arranged, and the distance between the cylinder body rotating tyre traveling driving device and the supporting device can be freely regulated according to the length of the cylinder body, therefore, good adaptability is achieved; two driving roller wheels simultaneously drive the cylinder body to rotate so that friction driving force is large, thereby ensuring the cylinder body to reliably rotate; and a belt drive speed reducer and a gear speed reducer are combined together so that speed reducing ratio is high, thereby enabling the cylinder body to be lower in rotating speed and more stably rotate.

The invention relates to a winding bobbin chuck on a textile machine, comprises a disk-shaped disk body, A central bore located in the center of the disk for mounting the drive shaft, a contact end face of the disc body in contact with the end face of the bobbin, A cylindrical table located on the contact end face and capable of mating with the inner circle of the drum tube, the outer surface of the columnar table is coated with a metal layer, The metal layer forms an uneven transmission part on the outer circumferential surface of the column table, and the transmission part and the bobbin cangenerate a larger friction driving force, so that the bobbin runs more smoothly, and the metal layer is not easy to wear, so that the filament winding bobbin chuck on the textile machine has a longerservice life.