422results about How to "High transmission precision" patented technology

The invention discloses a six-degree-of-freedom humanoid robot arm, and relates to a robot arm. The invention aims to solve the problems that the existing robot arm is cumbersome in joint structure, heavy in self weight, low in load bearing ratio and complicated to control. A shoulder rotating joint, a shoulder joint, an upper arm, an elbow rotating joint, a elbow swing joint, a fore arm, a wrist rotating joint, a wrist swing and a hand are sequentially arranged from top to bottom, wherein an arm swing motor is connected with a worm by virtue of a conveyor belt, an arm rotating motor is connected with a shoulder swing support by virtue of a conveyor belt, an upper arm shell is arranged between a shoulder joint and an elbow joint, an elbow rotating drive motor and a speed reducer are sequentially arranged in the upper arm shell from top to bottom, an elbow swing joint motor is arranged in an elbow joint shell and is connected with an elbow joint conveyor belt, an elbow joint speed reducer is arranged in the elbow joint shell, a hand connecting support is arranged between the fore arm and the hand, a wrist joint swing motor is arranged on one side of the hand connecting support, and a wrist joint rotating motor is arranged at the upper end of the hand connecting support. The six-degree-of-freedom humanoid robot arm is applied to a humanoid robot.

The invention discloses a six-axis degree-of-freedom manipulator. The six-axis degree-of-freedom manipulator comprises a base, wherein the base is in transmission connection with a first transmission mechanism, a second transmission mechanism, a third transmission mechanism, a fourth transmission mechanism, a fifth transmission mechanism and a sixth transmission mechanism in sequence, wherein the six transmission mechanism is in transmission connection with a mechanical palm part. A series of functions such as welding, spraying and handling are combined, the newest servo control system is adopted, and a series of new functions which can meet the industrial production of users are developed on the platform. The conventional complex transmission process is greatly simplified in the aspect of mechanical transmission, and the characteristic that bevel gear mesh type transmission is generally adopted by the conventional six axes is cancelled, so that the manipulator has a compacter structure and higher transmission efficiency, is more accurate in control and can effectively prevent the situation of jitter due to joint movement.

The invention discloses a two-degree-of-freedom joint of a space robot. The two-degree-of-freedom joint comprises two joint driving assemblies and a joint transmission assembly. Two-degree-of-freedom movement of the joint can be achieved. Three movement modes of pitching, rotating and combining of pitching and rotating can be achieved by adjusting the rotating speeds and the rotating angles of two motors. The joint transmission assembly is a differential movement mechanism formed by two input bevel gears and an output bevel gear. The two input bevel gears are fixedly connected with corresponding hypoid gears respectively, and an output flange is fixedly connected with the output bevel gear. First-stage speed reduction is carried out on the torque of the motors through planetary reducers connected with the motors, then second-stage speed reduction is carried out through the hypoid gears, and finally the torque is transmitted to the output end through the bevel gear differential mechanism. As the reduction ratios of two stages of speed reduction are large, the output torque of the mechanism is large, and the high load capacity is achieved.

The invention discloses an integrated type six degrees of freedom precision positioning platform. The integrated type six degrees of freedom precision positioning platform comprises a base, a lower platform component, a middle platform component and an upper platform component. The integrated type six degrees of freedom precision positioning platform utilizes a piezoelectric ceramics brake to enable the lower platform component to achieve rectilinear motion along an X direction and a Y direction of a coordinate system, enable the middle platform component to achieve a rectilinear motion along an Z direction of the coordinate system and a rotary oscillation around an axis which is parallel to the X axis and an axis which is parallel to the Y axis, and enables the upper platform component to rotate around the Z axis. The integrated type six degrees of freedom precision positioning platform can achieve precise control position on the six degrees of freedom and effectively avoids displacement coupling among axes due to the fact that the middle platform component and the lower platform component are designed into a symmetric structure. Meanwhile, the transmission platform can achieve integral manufacture, is driven by the piezoelectric ceramics brake, has the advantages of being free from friction and coupling, being high in precision, long in journey and high in resolution rate and can meet complex manufacturing and operation requirements of nanometer science and technology studies.

The invention discloses a hollow series-connection mechanical arm. The hollow series-connection mechanical arm comprises a plurality of modularized joints and a base, wherein the rotating end of the first modularized joint is vertically and rotationally connected with the base, the fixed end of the first modularized joint is fixedly connected with the rotating end of the second modularized joint, the fixed end of the second modularized joint is fixedly connected with one end of a first connecting arm, the other end of the first connecting arm is fixedly connected with the fixed end of the third modularized joint, the rotating end of the third modularized joint is fixedly connected with the fixed end of the fourth modularized joint, the rotating end of the fourth modularized joint is fixedly connected with one end of a second connecting arm, the other end of the second connecting arm is fixedly connected with the fixed end of the fifth modularized joint, and the rotating end of the fifth modularized joint is fixedly connected with the fixed end of the sixth modularized joint. The hollow series-connection mechanical arm of the structure is low in self weight, large in weight-power ratio, lower in energy consumption and simple in structure, and the self weight can be reduced easily.

The invention discloses an interventional surgical robot subordinate end and a mobile platform and a control method of the robot subordinate end and belongs to the technical field of minimally invasive blood vessel interventional operations. The mobile platform comprises a platform main beam, and platform connection blocks are arranged on the platform main beam through a linear guide rail pair D; the platform connection blocks are driven by a platform driving mechanism and used for installing a catheter controller or a guide wire controller. The interventional surgical robot subordinate end comprises the catheter controller, the guide wire controller and the mobile platform; the catheter controller and the guide wire controller are mounted on the two platform connection blocks respectively. According to the interventional surgical robot subordinate end, the catheter controller and the guide wire controller are installed on the mobile platform, and the problem is solved that it is difficult for an existing robot to complete co-operating of a catheter and a guide wire.

The invention relates to a screw-nut gear-shifting mechanism for an automatic two-gear transmission of an electric car. The mechanism comprises an input shaft, an intermediate shaft and a fork gear-shifting mechanism, wherein the input shaft and the intermediate shaft are parallel to each other; a first-gear driving gear and a second-gear driving gear are fixedly arranged on the input shaft respectively; a second-gear driven gear, a first-gear driven gear, a main reduction driving gear and a synchronizer are sequentially arranged on the intermediate shaft respectively; the first-gear driving gear and the first-gear driven gear are normally engaged, and the second-gear driving gear and the second-gear driven gear are normally engaged; a main reduction driven gear is arranged to be matched with the main reduction driving gear, and during installation for usage, the main reduction driven gear is fixed on a differential mechanism flange plate through bolts; and a fork of the fork gear-shifting mechanism is sleeved with a joint sleeve of the synchronizer. According to the mechanism, a screw and screw-nut mechanism is adopted, so that the accuracy and the reliability of gear shifting are improved; and the mechanism is simple in structure, convenient to install and small in size, has a self-locking function and can prevent gears from loosening.

The invention relates to a bidirectional conjugate tooth profile design method for harmonic gear drive. The bidirectional conjugate tooth profile design method for harmonic gear drive comprises the steps of firstly, expressing a flexible wheel top-section convex tooth profile coordinate through a parameter equation, converting to a rigid wheel coordinate system, solving to obtain discrete point coordinates of a theorical conjugate concave tooth profile and a concave tooth profile of a flexible wheel top-section convex tooth profile, determining the working tooth depth of a rigid wheel tooth profile through least square fit, determining a fitted curve section to be a rigid wheel bottom-section concave tooth profile and a rigid wheel top-section concave tooth profile, and calculating to accomplish a tooth profile design of a rigid wheel; and then expressing a rigid wheel top-section convex tooth profile coordinate through a parameter equation, converting to a flexible wheel coordinate system, solving to obtain discrete point coordinates of a theorical concave conjugate tooth profile in a flexible wheel bottom-section range, determining the tooth depth of a flexible wheel through least square fit, determining a fitted curve to be a flexible wheel bottom-section concave tooth profile, and calculating to obtain a flexible wheel working tooth profile. According to the bidirectional conjugate tooth profile design method for harmonic gear drive provided by the invention, the flexible wheel tooth profile and the rigid wheel tooth profile with bi-conjugate and secondary-conjugate phenomena are directly obtained, so that a conjugate contact area and a meshing zone are increased, the tooth surface contact stress is reduced, and the drive accuracy of a harmonic reducer is improved.

The invention provides a six-freedom-degree spray coating robot which comprises a base, a waist joint, a big arm joint, a small arm joint, a three-freedom-degree obliquely crossed wrist, a spray gun support, flanges, bearings, a plurality of first drive mechanisms and second drive mechanisms, wherein the waist joint is movably fixed to the base, the big arm joint is movably fixed to the waist joint, the small arm joint is movably fixed to the big arm joint, the three-freedom-degree obliquely crossed base is movably fixed to the small arm joint, the spray gun support is connected to the tail end of the three-freedom-degree obliquely crossed wrist, and the flanges and the bearings are movably connected among all the joints or between the joints and the wrist. The first drive mechanisms are used for driving the waist joint, the big arm joint and the small arm joint to work, and the second drive mechanisms are used for driving the three-freedom-degree obliquely crossed wrist to work. Each first drive mechanism comprises a first servo motor and an RV speed reducer. Each second drive mechanism comprises a second servo motor, a planetary reducer, a hollow transmission shaft and a gear pair, wherein the planetary reducer is connected with the second servo motor, the hollow transmission shaft is connected with the planetary reducer in a matched mode, and the gear pair is arranged in the three-freedom-degree obliquely crossed wrist and connected with the hollow transmission shaft.

Disclosed is a parallel robot set to assemble diminutive machine. The robot comprises two same three-dimensional parallel frames which are in series. The parallel frame has three active links that comprise two Huke gemels and a micro displacement amplifier. The computer control system drives the displacement output of the piezoelectricity equipment. The undersides of the three active links are connected with the middle plate, and another side is connected with the work plate in a parallel frame group.In another group, the undersides of the three active links are connected with the underpan, and another side is connected with the middle plate. The middle plate is hung under the underpan. The two fingers of the robot are set on the work plate and the middle plate, which can work just like the human fingers.

The invention relates to a dual-clutch automated transmission. An input shaft gear is arranged on an input shaft of an engine. The dual-clutch automated transmission comprises two independent monomer clutches, wherein the driving gear of the odd-gear clutch and the driving gear of the even-gear clutch are meshed with the input shaft gear in different transmission ratios respectively; the driving gear of the odd-gear clutch is fixed on a first secondary shaft; the driving gear of the even-gear clutch is fixed on a second secondary shaft; and the first secondary shaft and the second secondary shaft are arranged on two sides of the input shaft respectively and are parallel to the input shaft. In the dual-clutch automated transmission, an integrated dual-clutch is separated into two monomer clutches and the coaxial structure of the traditional dual-clutch transmission is transformed into a parallel structure, so that the manufacturing and processing difficulty of the dual-clutch transmission is simplified and the cost is reduced.

The invention discloses an electromechanically-integrated cycloidalpin wheel drive device which comprises a cycloidalpin wheel speed reducer assembly, a high-speed cylindrical gear meshing pair, a servo motor, a speed and temperature sensor, a hollow input shaft and an output shaft with a flange. According to the invention, a planetary speed reducer assembly with three eccentric shafts, an external meshing gear pair, the servo motor and the sensor are integrated into a whole, a coupler is omitted, thus the electromechanically-integrated cycloidalpin wheel drive device has the advantages of compact structure, energy consumption reduction and reduced transmission angle and displacement error between the shafts and improved system precision. The sensor detects an operation state online and feeds back the operation state to a signal processing center, therefore accidents are immediately prevented and controlled. Therefore, the electromechanically-integrated cycloidalpin wheel drive device has the advantages of no need of replacement of lubricating agents, compact structure, strong instantaneity, long service life, high transmission efficiency, strong bearing capacity, low vibration, high precision, convenience for maintenance and the like, and can be widely applied to fields of robots, ships, vehicles and the like.

The invention discloses a rotational joint module of a modularized reconfigurable robot. On the basis of planetary reduction, one level of harmonic reduction is added on motor output, a reduction ratio is improved, an output torque is added, and the transmission precision of the module is improved. An upper end cover and a lower end cover serve as installation joints, the flange-type design with locating seam allowances and pin holes is adopted, and the module is accurately and conveniently connected and located. All electric wires are arranged in a cage-type support, the upper end cover and the lower end cover and are isolated and protected by an outer cover, thereby avoiding the problem that the electric wires are coiled when a robot moves. Mechanical limit and electric limit are arranged in the module. On the basis of adopting an incremental coded disc, a rotating potentiometer is added to measure the assistant position of module movement, absolute position information is recorded under the condition of accidental power failure, and the system can continuously work after being electrified. The rotational joint module has the advantages of reasonable and simple structure, high precision and inner routing, is convenient to install and position and is safe and reliable to use.

The invention provides an adjustment device for adjusting the positions of drill holes simultaneously and relates to the field of machining equipment. The adjustment device comprises a supporting base and power transmission and position adjustment devices located on the supporting base. The supporting base is fixed to a multi-shaft box of a multi-hole drilling machine. Each power transmission and position adjustment device comprises a drill bit, a drill bit driving shaft and an adjustment mechanism, wherein the adjustment mechanism can make the drill bit driving shaft to move linearly in the direction perpendicular to the axis of an output shaft of the multi-shaft box, so that the position of the corresponding drill hole is adjusted. The drill bit driving shafts of the power transmission and position adjustment devices are in universal connection with the output shafts of the multi-shaft box. The adjustment device for adjusting the positions of the drill holes simultaneously further comprises a synchronous driving mechanism for the power transmission and position adjustment devices. The adjustment device can meet the requirement for drilling holes distributed in the circumferential distribution diameter portions of different workpieces, and the design cost and the tool cost are reduced.

The invention relates to a rotating triple-prism beam scanning device comprising a rotating double-prism system, a rotating single-prism system, a guide rail, an adjustable support, and a fixed support. The rotating single-prism system comprises a base component, a prism and frame assembly, and a worm-and-gear mechanism. The prism and frame assembly comprises a flat washer, a wedge prism, a rubber pad, a wedge retainer ring, a threaded retainer ring, and a frame. The base component comprises a base, a base baffle, and a base insert. The worm-and-gear mechanism comprises a rotary motor, a motor stand, a coupling, a worm, a bearing support, a rolling bearing, a worm gear, an encoder support, and a rotary encoder. The rotating double-prism system is formed by assembling two rotating single-prism systems together. In the invention, the three wedge prisms are driven by the worm-and-gear mechanisms to do full-circumferential rotation, transmission is stable and accurate, and the scanning precision and stability of dynamic beams can be ensured; the prisms are independent of one another in rotation control, and diversified scanning modes can be achieved; and by introducing the third prism to the double-prism system, the scanning field of beams is enlarged significantly, and the problem that a double-prism system has scanning blind areas and control singular points is solved effectively.

The invention discloses a numberical control hobbing machine with zero transmission, which comprises a machine body, a main shaft system, a hobbing cutter feeding and angle adjusting system and a control system; the main shaft system comprises a functional part of a hobbing cutter main shaft and a functional part of work-piece main shaft part; the functional part of the hobbing cutter main shaft is an integration of the rotator of the servo motor I and the hobbing cutter main shaft, and the functional part of the work-piece main shaft is an integration of the rotator of the servo motor II and the work-piece main shaft. The numberical control hobbing machine of the invention can remove the manufacturing errors of transmission component of generating motion and the influence on gear process caused by space and assembly error, is able to greatly improve process accuracy and process speed of machine tool. The numberical control hobbing machine of the invention has simple structure, is able to improve overall rigidity of machine tool, solves the wearing problem caused by mechanical transmission chain, improves the retentivity of precision, causes the hobbing speed to be higher than the numberical control hobbing machine with traditional structure, shortens milling time as well as based on which, the hobbing machine is provided with the machine tool conditions required by dry type hobbing through adopting a series of matching technical measures.

The invention relates to a new electric tractor comprising a rack, a traction hook, an electric power supply device, a drive axle driven by a direct current motor, a speed regulation handlebar, a motor speed controller, a universal wheel and a travelling wheel. The invention also relates to a charger base for charging storage batteries of the electric tractor, which comprises a base, a charger, aback cover board, a main baffle block, an assistant baffle block and a support board. The invention has the advantages of compact, small and exquisite integral structure, flexible and convenient operation and wide application range. The storage batteries of the electric tractor can be conveniently and rapidly taken out from or placed on a machine or the charger base, and the two storage batteriesare alternately used to enhance the utilization efficiency of the machine.

The invention relates to a full-automatic cutting machine of numerical controlled valve, which comprises a machine body, a feeding mechanism, a positioning mechanism, a geared head, a knife rest mechanism, a pushing mechanism and a numerical controlled electric box. The positioning mechanism utilizes a rigid ball base rotary positioning head and a positioning fixture at the end face of a valve disk part in the geared head to realize the full length cutting processing of the valve, and utilizes a flexible ball base rotary positioning head and a positioning fixture at the conical surface of the valve disk part in the geared head to realize the L-check size grooving processing of the valve. The rigid and flexible ball base rotary positioning heads overcome friction between workpieces and a positioner, eliminate the influences of the flat beat of the valve on positioning precision and the length precision of the processed valve reaches +/- 0.025mm. The cutting machine has simple structure, convenient operation and high full-automatic processing efficiency, is applicable to the full length cutting and grooving of the valve, and can be expanded to use the conical surface of the valve to position and process a sandwich groove of a lock and chamfer the end face of a valve rod; therefore, the full-automatic cutting machine has a wide application prospect.

The invention discloses an ultrasonic automatic detection system of copper and stainless steel dissimilar metal vacuum brazing water connector, a hardware of which consists of a water connector automatic detection system, a single crystal immersion focusing probe and a reference block; the detection device includes an industrial control machine, a motor driver and motors which are controlled by the industrial control machine and an ultrasonic flaw detection instrument which is respectively connected with the single crystal immersion focusing probe and the industrial control machine; the invention is characterized in that: one motor of the detection device drives a transmission shaft which is moved vertically, a probe angle adjuster is arranged on a shaft, the single crystal immersion focusing probe is arranged at the lower end of a probe angle adjuster, the other motor drives a horizontal rotating disk which is provided with the water connector to be detected, the position of the probe in a water connector cavity body can be regulated by the regulation of the probe angle adjuster, and the ultrasonic waves are transmitted for the detection of the brazing quality of the water connector. The invention has the advantages that the probe structure is compact, the detection system realizes the automatic control, the detection sensitivity is high, the operation is simple, and the invention can automatically identify the defect, calculate the area of defect and provide the spreading picture of the detection results of the water connector rapidly, accurately and intuitively.

The invention relates to a torus enveloping gapless worm wheel and worm decelerating device which is widely applied to various transmission mechanisms, in particular to the transmission mechanisms in the fields of vehicle lifter, overhead working truck, solar tracker, etc. The torus enveloping gapless worm wheel and worm decelerating device comprises a pedestal (1), a worm (2) and a pivoting support (3). The worm (2) comprises a mandrel (2.1), a left half worm (2.2), a right half worm (2.3), a spring (2.4) and a poke pin (2.5). The mandrel (2.1) is arranged in a shaft casing (1.1). The left half worm (2.2) and the right half worm (2.3) are sheathed at the mandrel (2.1) in zygomorphy. The spring (2.4) is embedded in a hole with large diameter of the left half worm (2.2) and the right half worm (2.3). The left end face of the left half worm (2.2) is pined with a left shaft shoulder (2.1.1) of the mandrel by the poke pin (2.5). The right end face of the right half worm (2.3) is pinned with a right shaft shoulder (2.1.2) of the core shaft by the poke pin (2.5). A clearance is left between the right end face of the left half worm (2.2) and the left end face of the right half worm (2.3). The torus enveloping gapless worm wheel and worm decelerating device can adjust the meshing state automatically and eliminates the clearance at the side of meshing gears of the worm wheel and the worm.

The invention provides a single-stage rigid tooth surface cycloid steel ball planetary gear reducer which comprises a reducer shell, an input shaft, an eccentric sleeve, steel ball sets, an end cover, an end cover disc, a cross-shaped disc, a planetary disc, a center disc, an output shaft, a pre-fastening nut, back-up bearings and bearing end covers. The single-stage rigid tooth surface cycloid steel ball planetary gear reducer is of a K-K-V type single-stage small-tooth-difference planetary transmission basic structure, inner cycloid grooves and outer cycloid grooves in the end faces of the center disc and the end faces of the planetary disc serve as tooth profiles, steel balls serve as mediators to carry out meshed transmission, tooth gaps are eliminated through four-point contact between the steel balls and the cycloid grooves, meanwhile, a tooth-gap-free cross-shaped steel ball constant speed mechanism is cooperated, and the single-stage rigid tooth surface cycloid steel ball planetary gear reducer has the advantages of being simple in structure, small in size, free of the tooth gaps, high in transmission accuracy and high in efficiency; meanwhile, the inner cycloid grooves and the outer cycloid grooves of the single-stage rigid tooth surface cycloid steel ball planetary gear reducer are respectively formed by two cycloid split discs in an assembled mode, surface heat treatment and grinding are conveniently carried out on the cycloid tooth surfaces of the split discs, and the single-stage rigid tooth surface cycloid steel ball planetary gear reducer further has the advantages of being high in tooth surface rigidity, small in heat treatment deformation, resistant to abrasions and long in service life.

The invention discloses a natural twist microscopic profile correction optimization method of a worm grinding wheel grinding helical gear. A meshing model of the worm grinding wheel grinding helical gear is constructed to deduce a contact trace equation, a gear form and lead evaluation range is selected, a gear surface twisting model is established, and a gear form and lead angle deviation value is obtained under the natural twist of the worm grinding wheel grinding helical gear; the correlation detection data of an existing project is collected, a twist quantity under natural twist is calculated, whether calculation data and detection data are matched or not is verified, and a transferring error under existing natural twist is calculated; and therefore, gear microscopic profile correction parameters related to the natural twist are optimized, wherein optimization comprises the following steps of: reducing a lead drum-shaped size, regulating a mating gear drum-shaped size, regulating a mating gear twist quantity, and lowering and compensating influence brought by the natural twist of the worm grinding wheel grinding helical gear. By use of the method, gear bearing performance can be effectively improved, gear meshing impact is reduced, and transmission accuracy and a NVH (Noise Vibration and Harshness) level are improved.

The invention relates to automatic feeding and taking equipment with a u-turning device. The automatic feeding and taking equipment comprises a rotary type material bin and two two-shaft mechanical arms and a u-turning transferring device; the rotary type material bin comprises a material bin base, a working table is arranged at the top of the material bin base, a plurality of material storage frames are installed on the working table, and a plurality of workpieces are stacked on each material storage frame; two transmission chain wheels are arranged on the two sides of the working table correspondingly, the two transmission chain wheels are connected through a transmission chain, and one of the transmission chain wheels is driven by a transmission chain wheel motor; the multiple material storage frames are arranged in the layout extending direction of the transmission chain, each material storage frame is in connected fit with the transmission chain through a connecting assembly, and each material storage frame achieves movement along with transmission of the transmission chain; a lifting frame is installed in the material bin base and is driven by a lifting assembly, so that the lifting frame penetrates the working table to upwards lift the workpieces; and the multiple material storage frames are all arranged to be capable of moving along with the transmission chain, rotary workpiece conveying is formed, the storage capacity of the workpieces is effectively increased, and the machining efficiency is effectively improved.

The invention relates to the technical field of industrial robots, in particular to a two-degree-of-freedom joint structure. The two-degree-of-freedom joint structure comprises a first rack, a first driving device, a first gear shaft, a first bevel gear, a second rack, a second driving device, a second gear shaft, a second bevel gear, a third rack, an output gear shaft, an output bevel gear, a clearance-elimination driving device, a clearance-elimination gear shaft and a clearance-elimination bevel gear. The first bevel gear is arranged on the first gear shaft, and the first driving device drives the first gear shaft to rotate. The second bevel gear is arranged on the second gear shaft, and the second driving device drives the second gear shaft to rotate. The output bevel gear is arranged on the output gear shaft. The clearance-elimination gear is arranged on the clearance-elimination gear shaft, and the clearance-elimination driving device drives the clearance-elimination gear shaft to rotate. The output bevel gear and the clearance-elimination bevel gear are engaged with the first bevel gear and the second bevel gear correspondingly at the same time. By adoption of the two-degree-of-freedom joint structure, the pitching motion can be achieved, the revolving motion and the pitching and revolving combined motion can also be achieved, and the transmission precision is higher.

Provided is a stepping linear motor which comprises a stator, a rotor, a rotor shaft and a screw rod. The rotor shaft is internally provided with a plastic internal nut which is used for being connected with the screw rod in a transmission way. The rotor shaft is a metal hollow shaft. The internal wall of the metal hollow shaft is provided with a ring groove which is used for embedding the plastic internal nut. The wall of the ring groove is provided with a concave-convex structure which is used for preventing the plastic internal nut from radial rotation and axial movement. The plastic internal nut is embedded inside the ring groove and engaged with the concave-convex structure. According to the stepping linear motor, the rotor is relatively high in the service life, great in anti-rotating and stopping performance, high in injection molding nut intensity, relatively high in transmission efficiency, relatively low in heat radiation, great in injection molding degree, relatively high in transmission accuracy, etc.

The invention relates to a non-circular gear-based variable transmission mechanism. The mechanism is provided with a driving wheel, a plurality of driven wheels, transition gear teeth and transmission gear teeth, wherein the driving wheel and the plurality of driven wheels are fixedly arranged on a driving shaft and a driven shaft at a set included angle respectively, and have the same modulus of the gear teeth; the transition gear teeth and transmission gear teeth are positioned on a non-circular pitch curve between the adjacent driven wheels; the transition gear teeth and transmission gear teeth on the non-circular pitch curve are used for completing gear shifting of the driving wheel between the two adjacent levels of driven wheels, namely axial feed movement is applied to the driving wheel on the premise of keeping the rotating speed of the driving wheel invariable, so that the driving wheel can be meshed with the transition gear teeth, the transmission gear teeth and the transition gear teeth on the non-circular pitch curve between each level of driven wheels in sequence to complete gear shifting and variable speed without the process of stalling and clutching. The device abandons a clutch, realizes variable transmission between the two shafts by using a non-circular gear on the non-circular pitch curve, and has the characteristics of compact structure, precise transmission, reliability, stability and easy dynamic balance of non-circular gear transmission mechanisms.

The invention relates to a combined appliance of an indoor high-voltage vacuum load switch and a high-voltage fuse, which comprises electrode posts 11, an operation mechanism 12, an isolating switch static contact base, an insulating cover 13 and a metal fixed frame 14. The combined appliance of the indoor high-voltage vacuum load switch and the high voltage fuse is characterized by being provided with an energy storage mechanism, a valve, an isolation and grounding linkage mechanism and a circuit breaker transmission mechanism. The combined appliance has the advantages of modularized mechanism, an energy storage maintenance function, high transmission accuracy, can realize functions of single-separation single-close or reclosing, and has the characteristics of breaking short-circuit current capability and being capable of realizing time sequence three-axis linkage and minisized layout of the valve, the isolation and the grounding, therefore, the invention provides the novel combinedappliance of the indoor high-voltage vacuum load switch and the high voltage fuse.

The invention discloses a ball screw pair pre-tightening force measurement and control system and method with a self-sensing function. The system comprises a pre-tightening device and a measurement and control device, a giant magnetostrictive material is used as the core, the functions of an actuator and a sensor are realized by using the normal inverse effect of the material, a permanent magnet provides a bias magnetic field for a giant magnetostrictive bar, one coil is used as an exciting coil for providing a driving magnetic field for the giant magnetostrictive actuator of the measurement and control device, the magnitude of pre-tightening force output by the actuator is controlled by changing the current of the exciting coil, and the other coil is used as a pick-up coil for realizing the self-sensing function of ball screw pair pre-tightening force by acquiring a magnetic field change caused by a pre-tightening force change. The system and the method can realize self-sensing of the ball screw pair pre-tightening force and automatic and accurate control of the pre-tightening force, and improve the transmission precision of the ball screw pair, so that the running precision and the machining quality of a numerically-controlled machine tool are guaranteed.

The invention discloses a machine tool rotating unit and a casing part high-precision rotary printing electrolytic machining machine tool. The machine tool rotating unit comprises a rotating conductive ring, a core shaft, a hollow main shaft, a torque motor and a main shaft seat; a rotating conductive ring stator is connected with the main shaft seat, a conductive ring rotor is connected with thecore shaft, the core shaft is fixedly connected with the hollow main shaft through an insulation supporting sleeve in an insulation mode, the hollow main shaft is responsible for clamping of a workpiece, and the core shaft is responsible for electrode electricity leading; a torque motor stator is connected with the main shaft seat through a shaft sleeve, a motor rotor is directly connected with the hollow main shaft, a cooling channel is designed in the rotating unit, and the cooling channel can also be used as a liquid supply channel for electrolytic machining so as to realize the internal liquid supply of a tool cathode. Compared with the design of an existing electrolytic machining machine tool that the transmission mode of connecting the servo motor and a speed reducer with the main shaft is adopted and the main shaft is responsible for force bearing and electricity leading, the machine tool has the characteristics that the transmission precision is high, allowable machining current is large, the advantages of high-efficiency machining of electrolytic machining are brought into full play, and the application range of rotary printing electrolytic machining is expanded.

The invention discloses a scanning bed control device and imaging diagnosis equipment. The scanning bed control device comprises a supporting platform, a scanning bed and a transmission mechanism which is supported and connected between the supporting platform and the scanning bed; the transmission mechanism comprises a drive motor, a middle frame and a transmission component, and the transmission component is arranged on the middle frame, wherein when the drive motor drives the middle frame to move back and forth by virtue of matching of a gear and a rack, the transmission component is driven by the middle frame to perform two-stage transmission while moving back and forth along with the middle frame. The scanning bed transmission mechanism, of novel structure, is designed for the scanning bed control device disclosed by the invention; the maximum-travel moving of the scanning bed can be achieved by two-stage transmission; and the transmission mechanism is not only simple in structure, but also high in transmission efficiency and high in transmission precision, and manufacturing cost is reduced.