83results about How to "Sufficient drive" patented technology

The present invention may advantageously provide an optical unit with shake correcting function in which shake of a movable module is corrected with a small torque and a quick response without mechanically connecting the fixed body and the movable module through a drive mechanism. An optical unit with shake correcting function may include a movable module having a lens, a fixed body supporting the movable module, a shake detection sensor for detecting shake of the movable module, and at least one pair of magnetic drive mechanism for shake correction which is structured on both sides of the movable module so that the movable module is swung with respect to the fixed body on the basis of detection result of the shake detection sensor to correct the shake of the movable module. The magnetic drive mechanism for shake correction is disposed so that a shake correction magnet is held by the fixed body and a shake correction coil is held by the movable module.

The invention discloses an electric paying-off automobile, and belongs to the technical field of electric winding-up and paying-off devices of cables. The electric paying-off automobile is flexible to move and convenient to use. According to the technical scheme, the electric paying-off automobile comprises an automobile frame, a triangle supporting frame, a cable wheel, hydraulic jacks and a hydraulic drive device; the triangle supporting frame is hinged to the tail end of the automobile frame through a supporting rod; the number of the hydraulic jacks is two; the ends of piston rods of the hydraulic jacks are hinged to sides opposite to the peak of the triangle supporting frame respectively; both the ends of cylinder bodies of the hydraulic jacks are hinged to the automobile frame. The electric paying-off automobile is applied to all kinds of electric power and communication departments.

The invention relates to an urban railway double-crossover middle turning device and a method for eliminating lateral bending and upwarping of a beam body. A butt joint part between a first rotary beam and a second rotary beam is of a lug boss lap-joint structure and is located on a base through a rotary table, the lower part of a non-butt-joint part of each of the first rotary beam and the second rotary beam is provided with a trolley moving mechanism, the trolley moving mechanisms are located on bases, a drive guide slot is arranged at the bottom of each of the first rotary beam and the second rotary beam, one ends of two drive arms are respectively located in the drive guide slots, the other ends of the two drive arms are respectively connected with a power output end of a respective reduction gear, the power input ends of the reduction gears are respectively connected with a power output end of a double-end motor reduction gear through a transmission shaft and a transmission shaft support frame, two locking frames are respectively located on the bases for supporting the non-butt-joint parts of the first rotary beam and the second rotary beam, and two locking mechanisms are respectively located at the back parts of the non-butt-joint parts of the first rotary beam and the second rotary beam and are respectively matched with the locking frames in a locking or opening manner.

The invention relates to the field of buoyancy control, and in particular, relates to a device for expanding volume, reducing density and increasing buoyancy, wherein the device includes a left metalhemisphere, a right metal hemisphere and a corrugated film connecting the left metal hemisphere and the right metal hemisphere. The left metal hemisphere and the right metal hemisphere are arranged ina relative buckling direction, and the left metal hemisphere and the right metal hemisphere are sealedly connected together by the corrugated film; a middle position, between the left metal hemisphere and the right metal hemisphere, of the corrugated film is fixedly provided with a motor support; the motor support is equipped with a drive motor with a speed reducer, and an output shaft of the speed reducer is externally connected with a double-worm gear mechanism; the inner side walls of the top points of the left metal hemisphere and the right metal hemisphere in the corrugated film stretching direction are fixedly provided with a left screw rod and a right screw rod respectively. The device for expanding volume, reducing density and increasing buoyancy can adjust the volume of a buoyancy device flexibly and rapidly, and also can be self locked, so the whole mechanism cannot consume too much electric energy, and meanwhile, the buoyancy can be easily adjusted by controlling positive and negative rotation and a rotation position of the driving motor.

The invention relates to an umbrella drying device, which comprises a cylindrical shell, the top of which is hinged with a circular cylinder cover; the shell also includes an inner net, the center of the bottom of the inner net is connected to a motor through a central wheel shaft, and the motor is also connected to There is a speed changer; the inner mesh poke is arranged in the outer cylinder, and the bottom of the outer cylinder has a through hole to communicate with the water tank, and the water accumulation tank is provided with a drain; the inner wall of the inner mesh poke is set There are multiple umbrella securing mechanisms. The umbrella drying device provided by the present invention is powered by a motor to ensure sufficient driving force and rotating speed, and can dry a large number of umbrellas at the same time, with automatic control, so that the structural design device can be rationalized, and the problem of umbrellas can be better solved. Shake off the problem.

The invention relates to a piezoelectric gas valve used in piezoelectric pile driver. Wherein, the valve is connected to one side of flexible baffle plate via hinge, and the lower end of another side has a force adjustable bolt while the upper end has a sealing disc and connecting the gas outlet; the valve has a gas inlet; the flexible support outside the valve contacts one end of piezoelectric pile driver while another end contacts the adjustable bolt; the upper end of one side of flexible baffle plate contacts one end of drive rod that inserting the valve and be sealed via the sealing cushion; the another end of drive rod that extending outside the valve contacts one end of piezoelectric pile driver. The invention uses piezoelectric pile driver with displacement amplifying function, and the baffle plate with flexible hinge as the baffle plate of nozzle baffle piezoelectric gas valve, with the advantages of straight motion and bended piezoelectric gas valve to confirm enough drive force and output displacement and avoid the gap error and response delay caused by the common lever amplifying device. The invention can be used in middle high pressure area with large flux, quick response and high drive force.

The invention discloses an electric linear feeding unit and an assembling method thereof and belongs to the field of electromechanical numerical control devices and application. The electric linear feeding unit structurally comprises a screw, a motor and a driving nut. A rotor of the motor is a hollow rotor in a sleeve shape, the hollow rotor is arranged on the screw in a sleeving mode, and the driving nut is meshed with the screw. The driving nut is fixedly connected with the hollow rotor, and the hollow rotor drives the driving nut to rotate so that the driving nut can drive the motor to linearly move along the screw. In the assembling process, the driving nut is installed on the screw first, and then the driving nut and the hollow rotor of the motor are connected. According to the electric linear feeding unit and the assembling method thereof, by means of the design of integrating the frameless motor and a nut driving type ball screw pair, the structure is compact, the problems of heat emitting, deformation and serious energy loss caused by screw rotation inertia force in the rotating process of a traditional screw are solved, vibration and noise are effectively reduced, the working precision of equipment is improved, and the transmission efficiency is improved.

The invention discloses a heat transfer plate forming device and forming method. The device comprises an electromagnetic driver, a mold, a power supply system and an edge pressing unit. The electromagnetic driver is located above a workpiece to be formed. The edge pressing unit is located on the edge of the workpiece to be formed. The mold is located below the workpiece to be formed. The workpieceto be formed is in series connection with the electromagnetic driver to form an electrical series loop. The power supply system provides pulse current for the series loop. The shape of the side, close to the workpiece to be formed, of the electromagnetic driver is matched with the outline shape of the area, to be formed, of the workpiece to be formed or the outline shape of an intermediate workpiece formed in the former step. The power supply system provides the pulse current for the series loop. Under the action of the pulse current, a magnetic field is generated around the workpiece to be formed and the electromagnetic driver, and electromagnetic force is generated under the combined action of the magnetic field and self electric current of the workpiece to be formed so that the workpiece to be formed is enabled to deform for multiple times to tend to be in the shape of the mold. A heat transfer plate stresses even force, and the forming accuracy of the heat transfer plate is improved.

The invention provides a two-shaft non-magnetic electric rotary table based on a piezoelectric ceramic motor. The two-shaft non-magnetic electric rotary table includes a horizontal rotary part and a pitching swing part, the horizontal rotary part comprises a base plate, three HR2 ceramic motors, a ceramic ring arranged between three HR2 ceramic motor output toggle fingers, a rotary ring adhered to the ceramic ring, and a grating disc connected to the rotary ring, one of the tree HR2 ceramic motors is provided with a rotary grating reading head support, the rotary grating reading head support is equipped with a rotary grating reading head, the grating disc is in fixed connection with an upper swaying body, a grating ruler is pasted to the upper end face of the grating disc, and the pitching swing part includes two upper swaying support blocks connected to the upper swaying body, two HR4 ceramic motors installed on the two upper swaying support blocks respectively, two ceramic chips arranged between two HR4 ceramic motor output toggle fingers, and an upper swing part bonded between the two ceramic chips. The two-shaft non-magnetic electric rotary table based on the piezoelectric ceramic motor provided by the invention has the advantages of no introduction of magnetic field, high precision, good dynamic performance, and good controllability, etc.

The invention provides an optical anti-vibration lens assembly and an optical anti-vibration method thereof. The optical anti-vibration lens assembly comprises a first substrate, a lens, a first memory alloy wire and a second memory alloy wire, wherein the lens is positioned inside the first substrate; the first substrate comprises a first side plate and a second side plate which are positioned on two sides of the lens; the first memory alloy wire comprises a first fixed end and a third fixed end which are fixed to the first side plate, a second fixed end fixed to the lens, a first extended section for connecting the first fixed end and the second fixed end, and a second extended section for connecting the third fixed end and the second fixed end; and the second memory alloy wire comprises a fourth fixed end and a sixth fixed end which are fixed to the second side plate, a fifth fixed end fixed to the lens, a third extended section for connecting the fourth fixed end and the fifth fixed end, and a fourth extended section for connecting the sixth fixed end and the fourth fixed end. The optical anti-vibration lens assembly provided by the invention has the advantages that the structure for realizing optical anti-vibration is simple and miniaturization design can be realized.

The invention discloses a suspension type patrol trolley. The suspension type patrol trolley comprises tracks, a trolley, power equipment and monitoring equipment, wherein the tracks comprise a vertical guide track and a horizontal track, the horizontal track is arranged on the bottom of the vertical guide track, and the horizontal track and the vertical track are arranged integrally; the trolley comprises a trolley body, a driving wheel, a pressure wheel and a loading wheel, wherein the driving wheel, a pressure wheel and a loading wheel are arranged in the trolley body; the driving wheel and the pressure wheel are arranged on two sides of the vertical guide track in the width direction and are arranged in a rolling mode; the driving equipment is arranged on the trolley body and is connected with the driving wheel; the monitoring equipment comprises a control terminal and a monitor-control mechanism which is connected with the control terminal, and the monitor-control mechanism is arranged on the trolley body and is connected with the driving equipment. The driving equipment drives the driving wheel to rotate, the trolley is made to move along the tracks, the monitor-control mechanism arranged on the trolley body can monitor and send data to the control terminal, the trolley can be controlled by controlling the control terminal, and the monitoring without dead angles is achieved.

The invention relates to the technical field of manipulators and discloses a humanoid manipulator. The humanoid manipulator comprises a palm component, a first finger component and a plurality of second finger components. The first finger component and the second finger components are movably connected to the palm component through connectors, the second finger components are in abreast arrangement, and the first finger component is opposite to one of the second finger components. Each of the first finger component and the second finger components is provided with two knuckles, and each knuckle is independently driven through a driving unit. The first finger component and the second finger components are driven by the driving units to realize grasping. The humanoid manipulator is capable of realizing actions of grasping, pinching, lifting and the like to meet daily utilization requirements. Each knuckle of the manipulator is independently driven by one motor, sufficient driving force can be provided in operation of the manipulator, grasping force and bending degree of the knuckles are increased, and the grasping performance of the manipulator is improved.

The invention discloses a silent motor driving mechanism. The silent motor driving mechanism comprises a motor, a gear set, a driving shaft, an angle sensor and a control circuit board, wherein a transmission shaft of the motor is transmitted to the driving shaft through the gear set, a torque is output from the driving shaft, and the angle sensor is connected with the control circuit board. By a gear set speed reduction device, the speed reduction of the output of a small-size motor is achieved, meanwhile, the driving output torque is increased, the working stability of the silent motor driving mechanism is improved, the size of the silent motor driving mechanism is reduced, and thus, equipment acquires enough torque and driving force.

The invention discloses an AGV dolly and an automatic carrying method thereof, and belongs to the technical field of unmanned transportation; the AGV dolly comprises a vehicle body; a lifting system is arranged on the top surface of the vehicle body and comprises a frame; a fork driven by a lifting driving device is slidably mounted on the frame, and a floating adjusting structure used for adjusting the mounting position of the fork on the frame is arranged on the fork. A driving system for driving the vehicle body to move is arranged at the bottom of the vehicle body; the vehicle body is further provided with a navigation system and a control system, and the driving system and the lifting system are controlled by the control system. According to the automatic carrying method of the AGV dolly, the AGV dolly is adopted; the function of automatically carrying multiple layers of goods on shelves is achieved, and the use scene of the AGV is expanded.

The invention relates to a high-performance AlON transparent ceramic and a low-temperature rapid preparation method thereof. The preparation method comprises the following steps: carrying out ball milling and mixing on gamma-Al2O3, AlN and three-phase sintering aids (Y2O3, MgO and La2O3); filling the dried powder into a graphite mold; the graphite mold is placed in a discharge plasma sintering furnace for vacuum sintering, and finally a sample is subjected to carbon removal treatment in the N2 atmosphere. According to the method, the novel Y2O3, MgO and La2O3 three-phase sintering aids are adopted, and the discharge plasma sintering technology is utilized to prepare the AlON transparent ceramic through solid-phase reaction in one step, so that the preparation process of the AlON transparent ceramic is simplified, the sintering temperature of the AlON transparent ceramic is greatly reduced, the sintering time is shortened, meanwhile, the density of the AlON transparent ceramic is improved, and the AlON transparent ceramic has good application prospects. The comprehensive mechanical property of the AlON transparent ceramic is greatly improved on the premise of ensuring the transmittance of the AlON ceramic.

The invention provides a space unfolding mechanism and unfolding method based on a shape memory polymer composite material. The unfolding mechanism comprises an alloy base, a 45-degree hinge and a rodpiece system. The rod piece system comprises a plurality of 180-degree hinges and a plurality of composite material hollow rod pieces; every two adjacent composite material hollow rod pieces are connected through a 180-degree hinge. A plurality of composite material hollow rod pieces of the space unfolding mechanism in the folded state are arranged in parallel from bottom to top; each of the 45-degree hinge and the 180-degree hinges comprises an alloy adapter and a sheet layer made of a shape memory polymer composite material, and the two ends of each sheet layer made of the shape memory polymer composite material are connected with the structures at the corresponding positions through alloy adapters respectively. According to the invention, the current situation that the practical application of the shape memory polymer composite material in a large deployable structure is less is changed, and the on-orbit task of the load can be realized.

The invention discloses a full-flexible hinge micro-displacement amplification mechanism, and belongs to the field of the flexible micro-nano. A piezoelectric ceramic is fixed in the middle of a rightbase of a support frame, and is connected with the middle part of a first lever of an amplification mechanism; a top end of the first lever is connected with the right base, and the lower side of thefirst lever is connected with the lower side of a second lever; a bottom end of the second lever is connected with a base of the support frame, the upper side of the second lever is connected with the lower side of a third lever, the bottom end of the third lever is connected with a middle base of the support frame, the top end of the third lever is connected with the bottom end of a right displacement conduction rod, and the right displacement conduction rod top end is connected with the bottom of an output platform. The full-flexible hinge micro-displacement amplification mechanism disclosed by the invention is a symmetric structure, a left side structure and a right side structure are completely same; the connection between the levers is the arc flexible hinge connection. The amplification mechanism can provide enough driving force for the whole mechanism, the structure is more compact, the entire rigidity is greater, the movement is stable, free from lubrication, zero in lagging,high in precision, and free from assembling error, capable of basically eliminating the coupling error and more suitable for the engineering demand.

The invention relates to a double-wheel single-hinging profiling ground wheel assembly and belongs to agricultural machinery. A connecting plat is hinged on a beam frame, a power output shaft is fixedly arranged on a driven chain wheel and is inserted in the connecting plate in a matching manner, two ends of a bidirectional hydraulic oil cylinder are respectively hinged on the beam frame and the connecting plate, a ground wheel bracket is hinged on the lower side part of the connecting plate, central shafts are fixedly arranged on a driving chain wheel and an overrunning clutch and are inserted into the connecting plate and the ground wheel bracket in a matching manner, a first driven chain wheel and a second driven chain wheel are fixedly arranged on the exterior of the overrunning clutch, a first driving ground wheel and a second driving ground wheel are arranged on two side parts of the ground wheel bracket, a first driving tower chain wheel and a second driving tower chain wheel are respectively fixedly arranged on a first driving ground assembly and a second driving ground assembly, a main driving chain is sleeved on the driven chain wheel and a driving chain, a first drivingchain and a second driving chain are respectively sleeved on the first driving tower chain wheel and the first driven chain wheel, and a second driving tower chain wheel and the second driven chain wheel. The double-wheel single-hinging profiling ground wheel assembly disclosed by the invention has the advantages of simple, novel and reasonable structure, enough driving power for operation, good profiling performance and reliability for using.

The invention relates to a flexible robot for abdominal cavity minimally invasive surgery, and relates to the technical field of medical equipment for abdominal cavity minimally invasive surgery. Theflexible robot comprises a driving system, a flexible robot main body and an end surgical forceps mechanism; the driving system comprises a linear feed system, a cable-driven system and a gas-driven system; the cable-driven system is connected with the linear feed system, and the flexible robot main body is arranged on the cable-driven system; the gas-driven system supplies gas to the flexible robot main body through a gas pipe passing through the cable-driven system, a front-end gripper of the end surgical forceps mechanism is arranged at the front end of the flexible robot main body, the endhand-held handle of the end surgical forceps mechanism is arranged on the cable-driven system, and a front-end gripper is connected with the end hand-held handle through a steel wire rope penetratingthe cable-driven system and the flexible robot main body. The flexible robot has the advantages of compact structure, adopts a flexible material, can realize polymorphic change and self variable stiffness effect with multi-module design, improves the spatial movement ability of the robot, and has the functions of realizing visual detection and biological tissue sampling.

Provided is a lens module having a lens drive mechanism having a simple structure which can stabilize the shift speed of an optical lens. The lens module has a structure wherein a lens holder (6), on which a moving body (5) that can be attracted to a magnet (4) is mounted and the optical lens not shown in a figure is to be mounted, is mounted on a housing (7) by using a guide pin (8), one side of a piezoelectric ceramic element (3) in a displacement generating direction (longitudinal direction) is bonded to the magnet (4), the other side is bonded to the housing (7), and the moving body (5) and the magnet (4) are attracted by a magnetic force. The lens holder (6) supporting the moving body (5) is supported by the guide pin (8) in a manner that the lens holder can be shifted. A lens driving mechanism has the magnetization direction of the magnet (4) in the radius direction of the optical lens by permitting the magnetization direction to substantially orthogonally intersect with the optical axis direction of the optical lens. The lens module is provided with the lens drive mechanism which vibrates the magnet (4) by vibration generated by a piezoelectric ceramic element (3), and shifts the lens holder (6) along an optical axis direction by driving the moving body (5) by using the vibration of the magnet (4) as a driving force.

The device disclosed in the present invention includes a tray drive mechanism that uses a drive motor as a power source to move the tray back and forth; After a predetermined duration elapses from the moment when the tray is considered to have moved to the exit position, the motor drive unit gradually reduces the voltage applied to the drive motor, so that the voltage drops from the first drive voltage to 0V.

The invention provides a control system and a control method of a wall-climbing robot, and belongs to the technical field of robots. The wall-climbing robot comprises a left front magnetic wheel, a right front magnetic wheel, a left rear magnetic wheel, a right rear magnetic wheel and a robot body, permanent magnets capable of being adsorbed on the wall surface of steel are respectively embedded in the left front magnetic wheel, the right front magnetic wheel, the left rear magnetic wheel and the right rear magnetic wheel, the left front magnetic wheel, the right front magnetic wheel, the leftrear magnetic wheel and the right rear magnetic wheel are connected with the robot body through driving motors, and the control system comprises an initialization module, a communication module, a parameter input module, a state display module, a robot motion control module and an alarm and emergency stop module. Each magnetic wheel of the wall-climbing robot is driven by a single motor so as toensure enough driving force, and each magnetic wheel of the wall-climbing robot can be stably adsorbed on a steel wall surface under the action of the permanent magnets, so the wall-climbing robot canwalk to a required position under the control system and the corresponding control method, and the automation of operation is realized.

The invention relates to an external control valve of a variable displacement compressor. The external control valve comprises a valve body, wherein a connector is arranged at the top of the valve body, a split washer is arranged between the connector and the valve body, a first O-shaped seal ring is sleeved on the outer side of the middle part of the connector, a valve rod is inserted into the interior of the connector, the top of the valve rod is connected with a core iron, a coil assembly is arranged at the outer side of the core iron, the bottom of the valve rod extends to the interior of the valve body, a first through hole is arranged at the top of the valve body, two second O-shaped seal rings are arranged in two grooves at the outer side of the middle part of the valve body, and a second through hole is arranged between the two second O-shaped seal rings. The invention has the beneficial effect that: by changing the pulse quantity applied to a stepping motor, a transmission rod moves upwards and downwards, therefore, the opening degree of the control valve is changed so as to satisfy the requirements on different refrigerating agent flows; the external control valve has the advantages of sufficient driving force, wide controllable range, favorable linear relationship between pulse signals and the opening degree, high reaction speed and good heat dissipation; and a working medium loop is in a closed structure and separated from an electric loop, therefore, the external control valve is safe and reliable.

The present invention may advantageously provide an optical unit with shake correcting function in which shake of a movable module is corrected with a small torque and a quick response without mechanically connecting the fixed body and the movable module through a drive mechanism. An optical unit with shake correcting function may include a movable module having a lens, a fixed body supporting the movable module, a shake detection sensor for detecting shake of the movable module, and at least one pair of magnetic drive mechanism for shake correction which is structured on both sides of the movable module so that the movable module is swung with respect to the fixed body on the basis of detection result of the shake detection sensor to correct the shake of the movable module. The magnetic drive mechanism for shake correction is disposed so that a shake correction magnet is held by the fixed body and a shake correction coil is held by the movable module.

The invention provides a railway tractor as well as a method, a device and a system for controlling the same. The method comprises the steps as follows: when the railway tractor runs on a track, the pressure in rodless cavities of telescopic oil cylinders of a front guide wheel and a rear guide wheel of the railway tractor is monitored; and the pressure of the front guide wheel and the rear guide wheel on the track is controlled through the monitored result to enable the pressure of the front guide wheel and the rear guide wheel on the track to be kept within a preset range. The pressure between the guide wheels and the track is controlled through monitored pressure in the rodless cavities of telescopic oil cylinders of the guide wheels to cause the pressure between the guide wheels and the track of the railway tractor to be kept within the reasonable range, so that the problem that when the railway tractor runs on the track, the pressure between the guide wheels and the track is too high or too low is solved, and the safety and the traction performance of the railway tractor are improved.

The invention discloses a free end wheel train of a diesel engine. The free end wheel train comprises a damping belt wheel, a tensioning idle wheel, a water pump belt wheel, a power generator belt wheel and an air-conditioner belt wheel; a single transmission system is composed of the damping belt wheel, the tensioning idle wheel and the water pump belt wheel; and the water pump belt wheel drives the power generator belt wheel and the air-conditioner belt wheel at the same time. By means of the wheel train, the water pump driving force is strengthened, and an air-conditioner is conveniently installed.

The invention discloses a thiophene-carbazole core four-arm hole transport material as well as a preparation method and application thereof; thiophene-carbazole is taken as a core, so that the HOMO energy level and LUMO energy level of the material are remarkably higher than those of mixed halogen perovskite, electrons can be prevented from jumping to a hole transport layer from a perovskite layer, and an interface electron recombination phenomenon is effectively inhibited. The preparation method comprises the following steps: carrying out a coupling reaction on p-iodoanisole and p-bromoaniline to generate an intermediate (5); carrying out substitution reaction on the intermediate (5) and bis(pinacolato)diboron to generate an intermediate (6); carrying out coupling reaction on the intermediate (6) and 2,3-dibromothiophene to generate an intermediate (7); carrying out bromination reaction on the intermediate (7) to generate an intermediate (8); carrying out coupling reaction on the intermediate (6) and 3,6-dibromocarbazole to generate an intermediate (9); and carrying out coupling reaction on the intermediate (9) and the intermediate (8) to generate a final product CZ-1. When the hole transport material provided by the invention is used for a perovskite solar cell, a cell device has relatively high photoelectric conversion efficiency.

The invention discloses a shaft type workpiece floating clamping and driving device for a four-axis machining center. The shaft type workpiece floating clamping and driving device comprises a supporting body and a rotating arm which is rotatable; a hole is transversely formed in the supporting body; an ejection rod is transversely moved to transversely penetrate through the hole; a transverse tapered hole is formed in the rotating arm; a steel ball is fit in the tapered hole; a pressure spring for return is arranged on the steel ball; clamping arms are arranged at the front end of the rotatingarm; after being pushed by the ejection rod, the steel ball pushes the rotating arm to drive the clamping arms to radially move toward the center, generating acting force for clamping; a center tip is arranged on the inner side of the front end of the rotating arm and correspondingly fit with the positions of the clamping arms; and the center lines of the ejection rod, the steel ball and the center tip are located at the same horizontal line. By means of the shaft type workpiece floating clamping and driving device, the problem that the excircle of a to-be-machined shaft type product and a center hole are not coaxial can be solved, and the effect that two clamping jaws clamp the excircle in a floating manner in the case that the center hole is centered can still be achieved. The shaft type workpiece floating clamping and driving device can obtain very high machining precision and improve the machining efficiency of equipment.

The invention provides a central integrated electric drive axle assembly with two motors and two speed reducers. The assembly is matched with the two driving motors and two speed reducer assemblies, and the driving motors and the two speed reducer assemblies can provide power for a whole vehicle at the same time or one of the driving motors and the speed reducer assemblies provides power for the whole vehicle according to demands; by selecting the motors with different parameters in power, torque, efficiency distribution and the like and the speed reducer assemblies which are matched with themotors and are different in speed ratio for use, four driving modes can be provided for the whole vehicle. The two driving motors are both high-speed motors, so that the torque is reduced on the premise of same power, and the weight and cost of the motors are reduced; in order to meet the requirement of the maximum climbing gradient of the whole vehicle, the two motors small in torque and high inrotation speed can be matched with the speed reducers with high speed ratios respectively, so that a large enough driving force is provided for the whole vehicle. Meanwhile, according to the conditionof the whole vehicle, the parameters such as power, torque and efficiency distribution of the two motors are reasonably selected, and the speed ratios of the speed reducers connected with the two motors are reasonably matched, so that an optimal driving mode is provided for the whole vehicle under the conditions of different loads, different vehicle speeds, different road conditions and the like.

The invention provides a lens drive motor, a camera and a mobile terminal device. The lens drive motor comprises a shell, a lens support, a coil and a magnet component and is characterized in that thecoil winds the lens support and is arranged in the shell, the magnet component is arranged between the shell and the lens support, the part, corresponding to the magnet component, of the shell is made of a first material, the other part of the shell is made of a second material, and the magnetic permeability of the second material is smaller than that of the first material. By the lens drive motor, the problem that a lens drive motor in the prior art is insufficient in driving force is solved.