273results about How to "High transmission efficiency" patented technology

The invention provides a gear choosing-shifting actuator for automatic speed changers, which comprises a gear-choosing actuator and a gear-shifting actuator, wherein the gear-choosing actuator comprises a gear-choosing guide shaft (4), a gear-choosing guide shaft gear (6) and a gear-choosing guide shaft angle sensor (7), and the gear-shifting actuator comprises a gear-shifting shaft (19), a gear-shifting sensor shaft (3), a gear-shifting rocker arm (32), a gear-shifting shaft rack (21) and a gear-shifting sensor shaft angle sensor (18). The gear choosing-shifting actuator is characterized in that the gear-choosing actuator and the gear-shifting actuator mesh with each other through the gear-shifting shaft rack (21) and the gear-choosing guide shaft gear (6). Due to the technical proposal, the gear choosing-shifting actuator has the advantages of compact structure, high transmission efficiency and strong gear choosing-shifting reliability.

The invention relates to a mechanical-hydraulic composite transmission mechanism, consisting of an engine, a transmission, a planetary gear box, a variable displacement hydraulic pump, a hydraulic motor and a reduction gearbox, wherein, the engine is orderly connected with and drives the transmission and the planetary gear box; a planetary gear mechanism of the planetary gear box distributes the power transmitted by the engine to respectively transmit the variable displacement hydraulic pump and a center wheel; the variable displacement hydraulic pump is orderly connected with and drives the hydraulic motor and a half shaft; the half shaft gathering a mechanical power flow transmitted by the center wheel and a hydraulic power flow transmitted by the hydraulic motor extends out of the planetary gear box to output power; the half shaft is connected with and drives the reduction gearbox and then drives a rear axle to drive an automobile to run. The special automobile refitted with the technology of the invention is a single engine configuration, continuously variable running can be achieved with a mechanical-hydraulic composite transmission mode, meantime, a vehicle device is driven to work with a mechanical transmission mode; a mechanical transmission mode can be converted for fast running, a dynamic system occupies small vehicle space, has a low emission, a high transmission efficiency and a low oil consumption.

The invention relates to a ground-motorizing platform used by electric device. It comprises a platform and four adjustable supporting legs. Its features are that: adjusting the foundation, stretching handspike structure and driving structure to the same plane; every supporting leg is driven by an independence motor that has speed, torsion, travel and failure feedback functions; the supporting leg adopts deceleration bearing as the deceleration structure, and ball screw shaft as executing structure. The invention adopts four points supporting adjusting technology, and successfully solves the automation control technology of four points on the same plane. And the failure detecting could orient every function unit. It can work between 40 degree centigrade below zero and 55 degree centigrade.

The invention discloses a reduction clutch for a washing machine and the washing machine. The reduction clutch comprises an input shaft, an input shaft sleeve, a brake wheel, a reducer, a dewatering shaft, an output shaft, a clutch device and a shell. The input shaft sleeve is installed on the input shaft in a sleeving mode, the dewatering shaft is installed on the output shaft in a sleeving mode, the reducer is installed on an inner cavity of the brake wheel, and the input shaft, the input shaft sleeve, the brake wheel and the output shaft are connected with the reducer respectively. The reducer is a double planetary gear train and comprises a first planetary gear train and a second planetary gear train, and the first planetary gear train and the second planetary gear train use a same planet carrier. The input shaft sleeve and the second planetary gear train are connected into one, the dewatering shaft and the brake wheel are connected into one, the output shaft is connected with input shaft in a transmission mode through the first planetary gear train, and the dewatering shaft is connected with the output shaft in a transmission mode through the brake wheel and the second planetary gear train. The conversion between the washing condition and the dewatering condition is controlled through the clutch device. The reduction clutch for the washing machine and the washing machine have the advantages that the structure is simple and compact, the manufacturing cost is low, the transmission is safe, reliable and efficient, the service life is long, and the noise is low.

The invention discloses a hydraulic system applied to a multi-spud leg lifting mechanism and relates to the field of self-elevating offshore drilling platforms and wind turbine installation vessels. The hydraulic system comprises a main oil passage, a bolt oil passage and a control oil passage, wherein the main oil passage comprises a high-pressure pump, an M-shaped function three-position four-way electro-hydraulic reversing valve, a first lifting cylinder group and a second lifting cylinder group; the bolt oil passage comprises a bolt medium-pressure pump, two Y-shaped function three-position four-way electromagnetic reversing valves, a first bolt cylinder group and a second bolt cylinder group; and the control oil passage comprises a control medium-pressure pump, a two-position four-way electromagnetic reversing valve and a hydraulic reversing valve with a one-way damper, which are sequentially connected. By applying the system, the two groups of lifting cylinders and bolt cylinders work cooperatively, a platform main body can ascend or descend for two strokes after one working condition is completed, and the motion of the platform main body can be regarded as continuous motion(the intermittent time is shorter relative to the climbing time), therefore the lifting speed is high and the transmission efficiency is high.

The invention relates to a flexible direct-drive type steering rack, which uses a flexible beam to enable a structure to be flexible. Left and right lateral racks easily do relative nodding movement, so as to be applicable to a triangular pit with a larger rail. The structure is flexible so that a series of suspension can be simplified to a very thin layer of rubber cushion, and the production cost is reduced; an elasticity transmission device is elastically suspended through a permanent magnet motor, so that the torque can be transmitted, the transmission efficiency can be improved, and the weight of a transmission mechanism can be reduced; a traction force and a braking force can be directly transmitted to a car body instead of the structure of the steering rack, and the stress condition of the structure of the steering rack is optimized; meanwhile, the length of a traction rod is not limited by the structure, so that the traction rod can be longer, the secondary addition rigidity brought by the traction rod can be reduced, and the riding comfort degree of a vehicle can be improved. A motor is suspended between wheel pairs, so that a shaft distance can be reduced. Therefore, the steering rack not only can have higher critical speed through a smaller curve, but also has good submissiveness on route irregularity.

The invention discloses a space-wedged-type pressurizing mechanism and a combined-type friction transmission wheel with the same. The space-wedged-type pressurizing mechanism mainly comprises a rotary guide mechanism G, wherein the rotary guide mechanism G is provided with a guide piece and a middle part which rotate around the same axis and are respectively provided with a guide surface; and when the rotary guide mechanism G is meshed, a rising angle Lambda of the abutting part between the guide surfaces of the guide piece and the middle part is more than Zetamax and is less than Ximin, wherein the Zetamax and the Ximin are respectively the maximum one in all minimum values and the minimum one in all maximum values of the rising angle Lambda which ensures that a guide friction pair formed at the abutting part can be self-locked. The friction transmission wheel provided with the pressurizing mechanism has the advantages that the axial pressing force is less than that of the prior art, but the transmission efficiency is higher, the working reliability is higher, the working life is longer and the mechanical wear is less.

The invention discloses a hydraulic control device for a hybrid power transmission, wherein a main oil-way is respectively connected with a lubricating oil-way, a clutch control oil-way and an electromagnetic valve control oil-way, the main oil-way is connected with a cooling and lubricating oil-way through an unloading valve, the cooling and lubrication oil-way is connected with a valve core control oil port of the unloading valve at the same time, the oil outlet of the unloading valve is respectively connected with an oil inlet of an overflow valve and the clutch control oil-way, the oil outlet of the overflow valve is connected with the lubricating oil-way, the clutch control oil-way is respectively connected with oil inlets of proportional reducing valves A and B, a reducing valve is arranged between the electromagnetic valve control oil-way and the main oil-way, the electromagnetic valve control oil-way is respectively connected with valve core control oil ports of the proportional reducing valves A and B through oil-saving holes, and is respectively connected with a switching electromagnetic valve and a halt locking hydraulic cylinder through the oil-saving holes. The hydraulic control device has simple structure, can rapidly lubricate the transmission, and is suitable for the hydraulic control of the hybrid power transmission.

The invention provides a vehicle hybrid power system which comprises an engine, a drive bridge, a first motor, a second motor, a third motor, a hydraulic pump, a hydraulic motor, a storage battery pack and a first load. The vehicle hybrid power system is characterized by having at least four operating modes. In the first operating mode, the engine directly drives an input shaft of the drive bridge to rotate; in the second operating mode, the engine drives the first motor to generate power, power generated by the first motor drives the second motor to rotate, and the second motor drives the input shaft of the drive bridge to rotate; in the third operating mode, the engine drives the hydraulic pump to pump oil, hydraulic energy generated from the hydraulic pump drives the first load to work; and in the fourth operating mode, hydraulic energy generated from potential energy of the first load drives the hydraulic motor to rotate, the hydraulic motor drives the third motor to generate power, and the power is stored in the storage battery pack. The vehicle hybrid power system has the advantages that fuel economy of the engine is improved, tail gas exhaust is reduced, energy is saved, and emission is reduced. The invention further provides a container stacker provided with the vehicle hybrid power system.

The invention discloses an adjustable-width vertically-cyclic stereo garage which comprises a rack.A plurality of vehicle-carrying hanging frames capable of vertically performing cyclic motion are hung on the front side and the rear side of the rack, the bottoms of the vehicle-carrying hanging frames are parking plot tray base frames, a driving device for driving the vehicle-carrying hanging frames to vertically perform cyclic motion is arranged on the rack and comprises a driving longitudinal shaft arranged at the lower portion of the rack and horizontally penetrating the rack, a shifting toothed chain wheel is installed at the left end and the right end of the driving longitudinal shaft respectively, and a rotatable disc with a smooth radial peripheral surface is installed above the two shifting toothed chain wheels at the top of the rack.A cyclic large-chain-link chain is correspondingly arranged on the left side and the right side of the rack respectively from top to bottom, and cyclic large-chain-link chain track adjusting rollers are movably connected to four corners of the left side of the rack.The cyclic large-chain-link chains are used for hanging the multiple vehicle-carrying hanging frames through a plurality of triangular chain plates.The adjustable-width vertically-cyclic stereo garage is small in occupied area, saves land, provides more parking plots and is good in practicability.

A V-belt type of automatic transmitting mechanism includes a drive pulley and a V-belt, and the drive pulley includes a fixed sheave which is fixed to a drive shaft and a movable sheave which is movable in a direction of the drive shaft. When the drive shaft rotates at a higher speed, the movable sheave is moved towards the fixed sheave so that the radius of engagement between each of the sheaves and the V-belt increases. The conical pressure surface of the movable sheave is formed so that an inclined angle thereof is uniform from its radially inner peripheral part to its radially outer peripheral part. Meanwhile, the conical pressure surface of the fixed sheave is formed so that an inclined angle of its radially inner peripheral part is smaller than that of its radially outer peripheral part.

The invention discloses a worm wheel-worm lead screw transmission type two-way stretch test machine, which is characterized by consisting of a rack, a loading power module, a sensor module and a clamping module, wherein the entire loading power module is fixedly arranged on the rack, two clamping heads of the clamping module penetrate through two stretch movement blocks of the loading power module respectively, and a dynamometer and a displacement sensor in the sensor module are also fixed on the loading power module; and after a test sample is fixed on the clamping heads, a motor in the loading power module rotates to drive a worm wheel and a worm, the worm wheel drives two reversed screw-thread ball screws respectively to further drive the two stretch movement blocks to move in opposite directions so as to achieve stretch or compression of the test sample, and stress values and displacement amounts of the test sample during stretching are acquired respectively by virtue of the dynamometer and the displacement sensor in the sensor module. The two-way stretch test machine disclosed by the invention can achieve stretch of small-size samples of a material, thereby assisting research of mechanical properties of a micro-nano structure of the material.

Disclosed is an actuator of an airplane electric braking device, a reduction gear assembly and a ball screw assembly are arranged in a shell. A second gear of the reduction gear assembly is meshed with a ball screw assembly gear of the ball screw assembly, and a first gear of the reduction gear assembly is meshed with an output shaft of a motor. A wire of the motor and a wire of the output end of a signal processor are led out through a plug assembly. A data line of a force sensor is connected with a data input port of the signal processor. A piston is arranged in a middle shell and a lower shell in a sealed mode. The ball screw assembly is arranged in the piston. By controlling the motor to produce corresponding rotating torque, amplifying the rotating torque through the reduction gear assembly, and converting rotating motion into linear motion to conduct outputting through a ball screw and then into a thrust force required by braking, the defects in the prior art are overcome, the structure is simple, transmission efficiency is high, and closed-loop control over an electro-mechanical actuator is achieved.

The invention belongs to the technical field of medical instruments, and provides an under-actuated self-adaptive type stair climbing wheelchair capable of automatically and stably climbing stairs. The wheelchair comprises a chair frame body, a battery, a balancing mechanism, an actuating system and a control system. The actuating system is a star-shaped under-actuated wheel train, a special mechanical intelligent part of the actuating system can be used for enabling the wheelchair to stably cross obstacles on a road and smoothly climb stairs and go down stairs, and the balancing mechanism can be used for regulating gravity center balance of the wheelchair in the process of climbing stairs and going down stairs to prevent the wheelchair from toppling due to unstable gravity center. Meanwhile, a one-way rotating support, a distance sensor and other safety protection means are adopted, and dangers which disabled people riding the wheelchair have are effectively avoided.

A moving contact component and an electromagnetic isolation driving intelligent switch using the moving contact component. The moving contact component is used to realize the opening or closing of the moving contact of a switch or a circuit breaker. The moving contact component comprises a moving iron core (4), two permanent magnet steels (5) and an opening or closing coil (10). The moving iron core is arranged between the two permanent magnet steels. The moving iron core is fixed on a moving contact (2). The middle part of each permanent magnet steel is provided with a through-hole. The moving contact is sleeved in the through-holes. The opening or closing coil is installed on an outer wall of an insulating cavity (7).

The invention discloses a lawn mower. A push rod control assembly comprises a self-propelled pull rod, a self-propelled stay rope, a self-propelled power line and a second operation component, wherein one end of the self-propelled stay rope is connected to the self-propelled pull rod and the other end is connected to the second operation component; one end of the self-propelled power line is connected to the second operation component, and the other end is connected to a control unit. A self-propelled drive system comprises a drive motor, a clutch box, a coupler and a clutch fixation base, wherein a motor shaft of the drive motor is connected to an input shaft of the clutch box by the coupler; the drive motor and the clutch box are fixed on the clutch fixation base; an output shaft of the clutch is connected to a transmission assembly; the transmission assembly is connected to a walking wheel; and the drive motor is electrically connected to the control unit. In this way, the lawn mower disclosed by the invention adopts a direct transmission manner, so that an intermediate speed-reducing gear set is omitted, transmission efficiency is increased, and working noise is reduced. The lawn mower has the advantages that the structure is compact and rational; manufacture cost is low; operations are simple, convenient and safe; and an operator can operate walking of the machine easily and conveniently.

The present invention discloses a stepless speed change device of epicyclic gear to achieve multi-channel drive, which is desinged by rotation and revolution of the epicyclic gear under different condition and control with different extent, and different distributive principle of torsion and rotate speed. It comprises two sets (or more than two)of rotating mechanism with epicyclic gear, one set is to be connection of input stage and input torsion, and the other as output stage driving back gera train .two rotating device of input stage and output stage connected through different gear ratio .which make up two drive path is low speed high torsion and hige speed low torsion, and epicyclic gear and assistant device are installed again in stepless speed change device or drive path to change gear ratio of the drive path. It is the gear teeth fixed stepless speed change device, have efficiency of the gear ratio and high-capacity driving.

The invention discloses a magnetic resonant coupling wireless energy transmission system based on filter design principles in the technical field of design of wireless energy transmission systems; and the magnetic resonant coupling wireless energy transmission system is instructed and designed by applying design principles of an inductive coupling second-order band-pass filter. The system comprises a power supply, an admittance converter, a parallel resonant circuit and a load. The design method uses synthetic design method principles of a filter to effectively terminate the relationship between the transmission power, the transmission efficiency, the transmission distance and the working frequency in the wireless energy transmission system and the values of all electronic elements in a circuit system, and the designed transmission system can work in the state of highest transmission power and transmission efficiency; and at the same time, through designing a certain band width, the wireless energy transmission system is used in a wider frequency range, so that the problem of reduced transmission power and transmission efficiency due to optimal transmission frequency variations caused by system errors is solved better.

The invention relates to a car complex transmission double-clutch transmission which comprises a powder separation and coupling device, a stepless speed changing unit, a double-shaft transmission mechanism, part connecting gears and a gear selecting and shifting actuating mechanism, wherein the powder separation and coupling device comprises wet-type double clutches, and the stepless speed changing unit is a belt-type stepless speed changing unit capable of changing the radius of a belt wheel and comprises a driving belt wheel and a driven belt wheel; either belt wheel comprises a movable disc at one side and a fixed disc at the other side, and the movable disc can axially move; a hydraulic actuating mechanism pushes the movable disc to axially move so as to continuously change the working radius of the belt wheel and continuously change the transmission ratio of the belt-type stepless speed changing unit; the double-shaft transmission mechanism is formed by sleeving a hollow transmission shaft on a central transmission shaft to form two transmission shafts, respectively arranges gears of the transmission on the two transmission shafts connected with the two clutches according to odd numbers and even numbers and finishes the gear-shifting process by alternately shifting the two clutches to realize power gear shifting.

The invention provides a device and method for recovering the inertial energy of automobile wheels, belonging to the fields of automobile energy saving and emission reduction and new energy electric vehicles. The invention adds a fixed internal gear insert on the inner ring of the automobile wheel hub. When the automobile wheel rotates, the power increases through the internal gear transmission mechanism and directly drives the permanent magnet synchronous generator to generate electricity, which is generated by the brake pedal sensor and the tire speed sensor. The signal controls the opening and closing of the electromagnetic clutch, which directly drives the permanent magnet synchronous generator to generate electricity. At the moment of braking and deceleration of the car, it can quickly release and recover the inertial energy of the car wheels in large quantities, and provide power to the battery or the power network of the whole vehicle. The device has the advantages of simple structure, small volume, high energy recovery rate, good reliability, low manufacturing cost, and certain technical and economic feasibility.

The invention discloses a straddle type monorail vehicle framework. The straddle type monorail vehicle framework comprises a pair of side beams and a crossbeam, wherein each of the side beam is in a Tshape, and the crossbeam is connected with the upper ends of the vertical portions of the two side beams at the same time; the longitudinal end face of a connecting region of each side beam and the crossbeam is provided with a drive device installation seat, and the two drive device installation seats are symmetric about the vertical central axis of the crossbeam; and a traction motor installation boss is installed on the outer side of each drive device installation seat, an axle installation boss is installed on the inner side of each drive device installation seat, each traction motor installation boss is provided with a shaft hole, and each shaft hole is parallel to the crossbeam and penetrates through the corresponding axle installation boss. The invention further provides a bogie ofthe framework. By the adoption of the framework, the transmission efficiency is improved, meanwhile, drive devices and axles tightly abut against each other, a whole drive system is assembled more compactly, the structure of the framework is simpler, the number of parts is reduced, cost is reduced, and vehicle operation stability and the comfort level are improved.

The invention discloses a self-adaptive rigid gripper which comprises a base and a clamping part arranged on the base. The clamping part comprises four clamping modules and a driving module, and the driving module is located at the center position defined by the four clamping modules; each clamping module comprises a transmission unit, a clamping jaw arranged on the transmission unit and a torsional spring connected between the transmission unit and the clamping jaw, and the transmission unit is arranged on the base; the clamping jaws and the transmission units are located in the same verticalplane, and one ends of the clamping jaws are rotationally connected with the transmission units; one ends of the torsional springs are fixed to the clamping jaws, and the other ends of the torsionalsprings are fixed to the transmission units, so that the clamping jaws elastically rotate towards one side of the enclosed center; the driving module comprises a first driving unit and a second driving unit, and the first driving unit is in transmission connection with the transmission units so as to drive every two opposite clamping jaws to move back and forth along a straight line; and the second driving unit is in transmission connection with the clamping jaws. The gripper has the advantages of a flexible gripper and a rigid gripper to a certain extent.

The present invention provides an automobile wheel inertial energy hydraulic recovery and comprehensive utilization system and a control method thereof, belonging to the technical field of energy conservation and emission reduction of automobiles. An inner gear ring is additionally arranged and fixed on an automobile hub, when automobile wheels rotate, power passes an inner gear transmission mechanism for acceleration, to directly drive a hydraulic pump/hydraulic motor to work. When the automobile is braked, is subjected to deceleration and slides, the inertial energy of the wheels is quickly largely converted into hydraulic energy to be stored, and when the automobile is started and is subjected to acceleration, the stored hydraulic energy is converted into mechanical energy to be directly provided for the wheels. The hydraulic energy in an energy accumulator can be applied to an automobile steering device hydraulic power assisted system or a disc brake hydraulic system by selecting the switching modes. The device is simple in structure, small in size, high in energy recovery rate and low in manufacturing cost, and has a certain technical and economic feasibility.

The invention relates to a V-shaped stirring mixer, which is provided with a V-shaped mixing barrel and a seat body, wherein the V-shaped mixing barrel consists of two cylindrical barrels; a discharging hole is formed at a lower end joint position between the two cylindrical barrels; the upper end of one of the cylindrical barrels is provided with a feeding hole, and the upper end of the other cylindrical barrel is provided with a vacuumizing device; two revolving shafts with hollow structures are symmetrically arranged on the two cylindrical barrels, and are rotationally connected with the seat body; a stirrer which passes through the cavities of the revolving shafts and is fixedly connected with the seat body is arranged in the V-shaped mixing barrel; a transmission mechanism which is connected with the revolving shafts and is used for driving the mixing barrel to rotate is arranged on the seat body, and comprises a motor, a connecting piece and a gear speed reducer; an output shaft of the gear speed reducer is connected with the revolving shafts through shaft couplings; and an input shaft of the gear speed reducer is connected with the output shaft of the motor through the connecting piece. The gear speed reducer is used for driving, so that a structure is more compact, the transmission efficiency is increased, the service life is prolonged, and the maintenance cost is reduced greatly.

The invention relates to a convertible walking mechanism of a robot, solving defects existing in a single walking mechanism, wherein each transmission chain part is controlled through the adoption of concentric shafts; each transmission interior shaft is directly connected with a track driving wheel in a track type structure and a wheel in a wheel type structure through flat keys; each track covers the track driving wheel and a track guide wheel; the track driving wheel and the track guide wheel covered by each track are fixedly arranged in each track bracket; each transmission exterior shaft is fixedly connected with the track bracket through screws, so that the swing of each track type structure is realized; and a track auxiliary wheel in each track type structure is fixedly arranged on a track auxiliary wheel supporting frame and connected in series with a motor together with two connecting bars through dowels for the formation of a four-bar mechanism group. The convertible walking mechanism of the robot is simple in mechanical structure, high in transmission efficiency and strong in adaptation ability, and can be applicable for various-condition road surfaces; and therefore, the application prospect is wide.

The invention discloses a wall climbing robot for cleaning the surfaces of ship hulls. The wall climbing robot comprises a middle mounting frame and two groups of driving wheel modules. The two groups of driving wheel modules are arranged on two sides of the wall climbing robot, and a cleaning operation module is mounted on the upper portion of the middle of the rear of the mounting frame; a universal wheel module is mounted on the lower portion of the middle of the rear of the mounting frame; each group of driving wheel modules comprises two parallel support frames, a group of driving modules, a group of tension wheel modules, a group of magnetic suction modules and a plurality of groups of auxiliary support wheels, the support frames of each group of driving wheel modules are arranged on two sides of the group of driving wheel modules, and the multiple groups of auxiliary support wheels of each group of driving wheel modules are arranged on two sides of the group of driving wheel modules; a connecting shaft is arranged between the two support frames on the two sides of each group of driving wheel modules; the corresponding driving modules, the corresponding tension wheel modules, the corresponding magnetic suction modules and the corresponding auxiliary support wheels are arranged on the two support frames of each group of driving wheel modules. The wall climbing robot has the advantages that the wall climbing robot is high in applicability, flexibility and obstacle crossing performance, and good effects of cleaning the surfaces of the ship hulls can be realized by the wall climbing robot; the wall climbing robot in a structural mode is provided with the two groups of driving wheel modules and the single group of universal wheel modules and accordingly can be flexibly and controllably operated; the wall climbing robot is in such a transmission form that a wheel rotary shaft and a tension wheel can be simultaneously driven by a synchronous belt wheel to rotate, accordingly, the wall climbing robot is simple in structure and high in transmission efficiency, and good transmission effects can be realized.

The invention provides a numerical control double-rotation working table driven by double-globoidal cams. A first tank is fixedly arranged on the top part of a bottom plate; a rotation shaft is arranged in the center of the first tank; a first driven plate is arranged on the rotation shaft and is connected with a double-stage driving mechanism for driving the first driven plate to rotate; the double-stage driving mechanism is arranged in the tank and is connected with a first servo motor for providing power; a rotation table is arranged on the top part of the rotation shaft; a top clamping table is adjustably arranged on the top part of the rotation table through a screw rod adjusting mechanism; a workpiece rotation mechanism for driving a workpiece to rotatably index is arranged on one side of the top part of the top clamping table; and a workpiece clamping mechanism is arranged at the power output end of the workpiece rotation mechanism. The rotation working table is provided with double rotation shafts, so that double-rotation-shaft linked space surface milling processing can be realized; and by applying a double-globoidal-cam retarding mechanism, the friction loss during the use of worm-gear mesh transmission is reduced.

The invention discloses a large-sized main shaft direct-drive type rotary worktable structure. A torque motor stator is combined on a worktable base, a torque motor rotor is combined on a connector, and the connector is combined with a worktable; the connector is located on the worktable base through a thrust ball bearing A, an inner hole of the connector is connected with an outer ring of a double-row cylindrical roller bearing in a matched way, the double-row cylindrical roller bearing is mounted on a main shaft, and the main shaft is connected and combined with a central hole of the worktable base; a pressure block connected with the main shaft is connected with the connector through a thrust ball bearing B; a stator of an encoder is fixed on a flange plate C, the flange plate C is fixed on the main shaft, and a rotor of the encoder is fixed on the worktable through a flange plate A and a flange plate B; the central hole of the worktable is connected with a worktable cover plate, and the worktable cover plate is connected with the flange plate B. A torque motor is adopted for directly driving the rotary worktable to rotate; the large-sized main shaft direct-drive type rotary worktable structure has the characteristics of compact structure, small noise, high precision, high reliability and the like, and can greatly improve the automation level of advanced machine tools in China.

The invention relates to a porphyrin edge covalent fused graphene nonlinear nano hybrid material and preparation thereof. Diamino porphyrin is in parallel bond connection to the GO edge through condensation reaction, and a third-order nonlinear coefficient of an organic-inorganic hybrid material is enhanced through enhanced electron coupling and transmission effect between the diamino porphyrin and the GO edge. According to the invention, amino porphyrin and ortho-diketone at the edge of GO are subjected to a condensation reaction to form a pyrazine ring, the novel edge-fused organic-inorganic covalent functionalized nano-hybrid material is successfully prepared, and the pyrazine ring enhances the conjugation degree and electron coupling and transmission between porphyrin and graphene; and therefore, compared with a traditional material, the prepared material has more enhanced nonlinear optical performance in the field of nanosecond visible light, and has very strong reference significance.

The invention discloses a motor type gear selecting and shifting actuator assembly, and belongs to the technical field of automatic transmissions. The assembly aims to solve the problems that the gear shifting force provided by motor gear shifting is small and the utilization rate of output torque of existing motor type gear selecting and shifting actuators is low. The assembly mainly comprises a shell, motors, ball screws, sensors, a gear selecting and shifting head and a gear shifting shaft, wherein the two motors are arranged in parallel and drive gear selecting movement and gear shifting movement respectively, and the ball screws are connected to the motors to change rotational motion of the motors into linear motion of the gear selecting and shifting head. According to the assembly, the output torque of the motors can be fully utilized. The assembly has the advantages that the structure is compact, the transmission efficiency is high, the response speed is high and control is accurate.