4195 results about "Linear motor" patented technology

The invention relates to a dynamic precision compensation control method based on an intelligent PCB drilling machine, and the method comprises the steps: collecting a dynamic parameter set in real time through a multi-source sensor group disposed on a drilling main shaft, the dynamic parameter set comprises displacement deviation caused by axial deformation of a main shaft, thermal deformation analyzed based on interlayer temperature gradient and frequency spectrum characteristics reflecting tool-material coupling vibration, and according to the multi-dimensional compensation vector and current drilling process parameters, a space trajectory correction instruction and a motion parameter optimization instruction are dynamically synthesized, so that the dynamic parameter set is obtained. Wherein the trajectory correction instruction reconstructs a real-time interpolation path through a B-spline curve, the motion controller receives a space trajectory correction instruction and a motion parameter optimization instruction, at least three times of compensation iteration are completed in a single drilling period, a linear motor and a spindle motor are driven to execute online precision compensation, and the execution delay of the compensation instruction is smaller than 2 ms.

This invention introduces a kinetic energy recovery wind-wave integrated system for offshore wind power generation. The system consists of a semi-submersible platform equipped with a fan and an internal wave energy device. The device includes a shell housing a Power Take-Off (PTO) system, featuring a permanent magnet synchronous linear motor and an active controller. The motor's stator is fixed inside the shell, while its mover is connected to a counterweight block outside the stator, linked to the shell's top via a spring. Limiters are installed at both ends of the shell to restrict the counterweight block's movement. This system utilizes the wave energy device to absorb kinetic energy, which otherwise affects wind turbine stability, and converts it into usable electrical energy via the PTO system. This enhances the stability and safety of offshore wind turbine power generation.

The invention discloses a high-precision linear vibration feedback motor system, and relates to the technical field of precise electromagnetic driving, and the system comprises a core driving module which is a moving magnet type linear motor of a Halbach array magnetic circuit structure, and is integrated with a multi-physics field sensing unit; the dynamic parameter tracking module is used for acquiring a reed rigidity coefficient, a damping coefficient and a magnetic constant in real time when the motor runs, and establishing a dynamic displacement model based on a recursive least square method; a double-closed-loop control framework is adopted, an inner loop adopts field-oriented control, and an outer loop is based on model prediction control; the aging prediction unit activates a temperature rise compensation algorithm when the accumulated number of vibration times is greater than a set threshold value; the self-adaptive calibration engine is used for injecting a sweep frequency excitation signal when the system is started, and automatically compensating individual difference parameters according to the harmonic peak offset; and the digital twin mapping unit is used for establishing a real-time mapping relationship between the physical parameters of the motor and the virtual model, and dynamically correcting the model parameters by comparing the actual displacement with the model displacement.

The invention discloses a driving module of a reciprocating type shaver. The driving module comprises a base, a driving assembly and a driving assembly, the two ends of the deflection frame are fixed to the base through elastic pieces to form a frame structure. The output shaft is mounted above the deflection frame; the horizontal motor is arranged on the base; the cam is arranged on a motor power shaft, and grooves with parallel normal sections and equal width are formed in the surface of the cam; the lower end of the rocker arm is hinged to the base, a middle rocker arm shaft is assembled in the groove, and the upper end is in linkage with the deflection frame. Rotary motion is converted into high-frequency linear swing through precise cooperation of the cam and the rocker arm, the transmission efficiency is high, and noise is low; the integrated modular structure of the base and the motor enables the cam and the rocker arm to be matched more accurately and reliably; the double-output shaft symmetrically and reversely swings to realize dynamic balance vibration reduction; the compact horizontal layout saves space; the product has the economical efficiency of a common motor and the performance advantages of a linear motor, the comfort and reliability of a shaver product are improved, and meanwhile the cost is reduced.

An active mass damper system includes one or more sensors configured to detect motion of a C-arm and output corresponding motion data representative of the motion of the C-arm. A mass damper assembly within the C-arm includes a linear motor, and a mass coupled to the linear motor. The active mass damper system further includes a controller configured to receive the motion data, process the motion data by applying one or more filters to the motion data to create filtered motion data, and control the linear motor, based on the filtered motion data and motor control tuning parameters, to move the mass in a linear reciprocating path to provide a force having a magnitude and a phase configured to dampen at least a portion of the movement of the C-arm.

The utility model relates to the technical field of precise driving and positioning, and discloses a linear motor type electric screw which comprises a screw rod, a shell, a driving mechanism, a mechanism seat and a threaded pipe. The driving mechanism is arranged in a cavity defined by the shell and the mechanism base. The driving mechanism comprises a flexible hinge, piezoelectric ceramics and a pre-tightening spring. The flexible hinge comprises a first clamping jaw and a second clamping jaw. And the first clamping jaw and the second clamping jaw provide rotating force for the screw rod under the action of the piezoelectric ceramics. And the pre-tightening springs are used for applying pre-tightening force between the first clamping jaw and the screw rod and between the second clamping jaw and the screw rod. The threaded pipe is used for supporting the threaded rod and being connected with an external mechanism. According to the utility model, the piezoelectric ceramic is adopted for driving and the flexible hinge is combined, so that precise linear motion control is realized, and the touch-free adjusting device has the characteristics of high resolution, high precision and compact structure, and realizes touch-free adjustment of the optical adjusting bracket which is difficult to touch. A plurality of linear motor type electric screws are combined for use, so that two-dimensional or three-dimensional motion control can be realized.

The invention relates to a cooling structure for an ultraprecise linear motor and belongs to the technical field of linear motors. The cooling structure solves the problem of proneness to heat exchange with environment caused by high side temperature of two-side surface-mounted cooling structures of existing linear motors. The cooling structure comprises a winding supporting portion, a winding and a heat conductive portion, wherein the winding is fixed on the surface of the winding supporting portion, the heat conductive portion is arranged on the surface on the outer side and fixedly connected with the winding supporting portion, the heat conductive portion is a copper foil ring which fits the outer profile of the winding and is sleeved and fixed on the surface on the outer side of the winding, or the heat conductive portion is a copper foil heat conductive ring formed by arraying multiple copper foil sections in a dispersed manner, the copper coil heat conductive ring fits the outer profile of the winding, and each copper coil section is fixed on the surface on the outer side of the winding. The cooling structure for the ultraprecise linear motor is suitable for cooling of linear motors.

The invention provides a related method of linear motor equipment, the method is applied to industrial conveying, and the method comprises the following steps: creating a plurality of position points, the plurality of position points are distributed along a stator line body, the plurality of position points are used for controlling the moving path of a mover module, and the mover module is used for controlling the moving path of the mover module based on the conveying process information of the mover module. And corresponding dynamic pointing information is configured for each position point, and the dynamic pointing information is used for dynamically indicating a pointing object of the position point according to a conveying condition existing in the transportation scene. According to the method, the dynamic pointing information can be configured for each position point through the conveying process information of the mover module, the function of dynamically adjusting the pointing of the position points is achieved, the position points are used for controlling the moving path of the mover module, and the dynamic adjustment of the pointing of the position points can enable the moving path of the mover module to have variability; the moving flexibility of the mover module is improved, so that the transportation efficiency is improved, and the device is more suitable for complex and changeable working scenes.

The invention belongs to the technical field of energy storage, and particularly relates to a vertical circulation type single-well gravity energy storage system based on a linear motor, the vertical circulation type single-well gravity energy storage system comprises a weight storage system, an energy storage unit, a transportation system and a power system, and the weight storage system comprises an upper-layer energy storage chamber and a lower-layer energy storage chamber which are arranged up and down; the energy storage unit comprises a plurality of energy boxes and a plurality of weights arranged in the upper-layer energy storage chamber and the lower-layer energy storage chamber; the transportation system comprises a transportation track penetrating through the upper-layer energy storage chamber and the lower-layer energy storage chamber, and the transportation track is used for transporting the energy box; the power system comprises a secondary linear motor arranged on the conveying rail and a primary linear motor arranged on the energy box and is used for providing power for the energy box. The energy storage capacity expansion mode is simple, the expansion cost is low, the energy storage efficiency is high, the continuity of output or input power can be realized, and the fault tolerance performance is high.

The invention relates to the technical field of plastic packaging bag tensile detection, and discloses a plastic packaging bag tensile detection device which comprises a processing platform, a storage cabinet is arranged in the processing platform, supporting legs are fixedly connected to the four corners of the bottom of the processing platform, and a tensile detection mechanism is arranged at the top of the processing platform; the four corners of a plastic bag are stably clamped through a screw rod, a movable clamping plate and a fixed clamping plate, cooperative movement of a motor sliding rail, a linear motor, a movable frame, a sliding rod and a first sliding block is matched, pulling force on the two sides is converted into pulling force in four directions through an inclined sliding groove and a second sliding block, and stretching resistance detection in the four directions is conducted on the plastic bag. According to the design, the limitation that only two-side stretching detection is adopted in the prior art is overcome, the tensile data of the plastic bag in different directions can be obtained, the tensile performance of the plastic bag can be comprehensively evaluated, a more accurate basis is provided for quality evaluation, it is ensured that the plastic bags with different purposes can bear the tensile force in the corresponding direction in actual use, and the detection precision is improved.

The utility model discloses a transportation device which comprises a rotor, a conveying line assembly and a transfer assembly. The conveying line assembly is magnetically coupled with the mover and drives the mover to move, the conveying line assembly comprises a main conveying line, an auxiliary conveying line and a switching stator arranged between the main conveying line and the auxiliary conveying line, and a first conveying path and a second conveying path on the switching stator are both used for allowing the mover to move; the transfer assembly comprises a control piece and a transfer piece which are electrically connected, the transfer piece transfers workpieces in the vertical direction and / or transfers the workpieces in the horizontal direction, and the transfer assembly is at least one of belt conveying, linear motor conveying and pneumatic conveying. According to the embodiment, the rotor and the transfer assembly are arranged in a split mode, the overall mass of the rotor is reduced, the mode that workpieces are fed in a single direction is changed through the arrangement of the transfer assembly, and the workpieces are transferred more conveniently; meanwhile, the independent auxiliary conveying line is arranged, conveying of other rotors in the main conveying line is not affected, and the conveying efficiency is improved.

The invention discloses a plasma arc welding device for producing a shell of a portable gas stove, and relates to the technical field of welding tools for the shell of the portable gas stove, the plasma arc welding device comprises a rack, a protection box mounted at the top of the rack and an image monitor mounted on the inner top surface of the protection box, and a rotary three-turn chuck is mounted on one side of the case; a first linear motor is mounted on the other side of the top of the rack, and a butt joint mechanism is mounted on the mounting seat; a feeding and discharging mechanism is mounted at the outer end of the herringbone rotating seat; a plasma arc welding mechanical arm is mounted on a moving seat of the second linear motor; the full-process automation of the to-be-welded assembly from feeding, grabbing to transferring is achieved; through cooperative clamping of the arc-shaped hoop plate and the arc-shaped clamping plate and cooperation with an anti-deviation structure of the anti-rotation arc strip and the anti-sliding groove, the stability of a to-be-welded part in the transferring process is ensured, and the positioning deviation risk caused by manual operation is greatly reduced; and through linkage adjustment of the electric push cylinder and the lifting assembly, the grabbing height and the transferring position of the shell of the portable gas stove of different specifications can be accurately adapted.

The invention discloses a multi-objective optimization method and equipment for a flat-plate permanent magnet synchronous linear motor and a medium, and the method comprises the steps: taking the average thrust and thrust fluctuation of the flat-plate permanent magnet synchronous linear motor as optimization objectives, analyzing design parameters influencing the flat-plate permanent magnet synchronous linear motor, and determining the value range of the flat-plate permanent magnet synchronous linear motor; designing and constructing a sample library through a Latin hypercube test; establishing an RF model based on the sample library; and the RF model is optimized based on an improved NSGA-II multi-target algorithm. The improved content comprises the steps of initializing a population by adopting logic mapping, and selecting elite individuals by combining non-dominated sorting and crowding distance calculation; two-point crossover, binary crossover simulation, random variation and adaptive variation strategies are adopted, so that the global search and local development capability of the algorithm is enhanced; in combination with a PID adjustment mechanism, an individual updating mode is adjusted according to an individual fitness value and a distance from the Pareto frontier, and the algorithm search efficiency and the global optimization capability are improved. After optimization, the motor thrust peak-to-peak value is greatly reduced, and the thrust fluctuation is remarkably improved.

The utility model relates to the technical field of robots, and provides a novel humanoid dexterous hand which comprises a base, an outer covering plastic shell and a metal framework arranged on one side of the base. By starting a first linear motor, a second linear motor and a third linear motor, the first linear motor contracts and drives a motor connecting piece to conduct hinge joint, meanwhile, a first cross connecting rod is linked to conduct hinge joint, knuckles are bent and used for taking objects, and the second linear motor contracts and drives a head connecting piece to conduct hinge joint. During hinging, the position of the fingertip knuckles of the thumb can be adjusted according to the requirement for object taking so as to assist in object taking, meanwhile, a third linear motor is contracted so that a third cross connecting rod and a fourth cross connecting rod can be hinged, meanwhile, the fingertip knuckles of the thumb can be bent, and object taking can be assisted; therefore, the purpose of flexibly adjusting the dexterous hand is achieved, the dexterous hand is suitable for taking objects in different shapes, and meanwhile the dexterous fingers can move independently.

The present application relates to the technical field of bendable circuit boards and provides a magnetic assembly and assembly method thereof, a linear motor, a camera, and an electronic device, capable of resolving the problems of low connection reliability between two repelling magnets in magnetic assemblies and low assembly efficiency of magnetic assemblies in related technologies. The magnetic assembly includes a magnet unit, which includes multiple magnets, wherein two adjacent and repelling magnets are welded together. The present application can be used in electronic devices such as mobile phones.

This application discloses a linear motor with an integrated mover and sliding table, which includes a sliding assembly, a base, a magnetic rail, a sliding structure, and a guide rail, the magnetic rail is connected to the base, the sliding assembly is provided with a mover. The base is provided with a first surface facing the sliding assembly, and a recess opening on the first surface, the magnetic rail is filled in the recess, and the magnetic rail is provided with a second surface facing the sliding assembly, which is flush with the first surface; the guide rail is provided on an outer side wall of the base, located on one side of the first surface away from the sliding assembly.

The invention discloses stainless steel vacuum barrel welding equipment and a welding method, and relates to the technical field of welding equipment.The stainless steel vacuum barrel welding equipment comprises a main body, a sealing door is slidably connected to one end of the main body, a limiting mechanism is arranged in the main body, two sets of electric push rods are arranged in the limiting mechanism, and fixing plates are fixed to the two sides of the top end of the limiting mechanism; two sets of metal plates are arranged at one end of the sealing door, the metal plates and the sealing door are elastically connected through a plurality of sets of springs, and a first U-shaped block is fixed to one end of each metal plate. A linear motor is started through a control panel to drive a limiting mechanism to move outwards, a linkage clamping mechanism and a rotary telescopic mechanism are synchronously expanded outwards, electron beam welding is started after an external vacuum pump establishes a vacuum environment, the equipment adopts inner and outer double-side force application to ensure uniform clamping, a shape memory alloy compensates a high-temperature sealing gap, and a spring realizes automatic reset; and sealing failure caused by deformation and thermal deformation of the thin-wall cylinder is effectively prevented.

A deep engineering hard rock true triaxial dynamic disturbance aging fracture testing device belongs to the technical field of rock mechanics tests and comprises a counter-force frame, a pressure chamber and six main stress linear disturbance actuators. The main stress linear disturbance actuator comprises a linear disturbance motor and a main stress hydraulic cylinder; the linear disturbance motor is coaxially and fixedly installed at the outer end of a cylinder barrel of the main stress hydraulic cylinder, a dowel bar is arranged in a central hole channel of a piston rod of the main stress hydraulic cylinder, and a power output shaft of the linear disturbance motor is coaxially and fixedly connected with the dowel bar. According to the utility model, the matching form of a traditional dynamic actuator and a hydraulic oil source is abandoned, the linear motor is introduced into the true triaxial test equipment as a power disturbance source, the long-time dynamic disturbance structure of the true triaxial test equipment is simplified, and the energy consumption of the equipment is greatly reduced after the linear motor is used as the power disturbance source; the maintenance process is simpler, the maintenance cost is greatly reduced, the installation and debugging processes of the linear motor are more time-saving and labor-saving, and no extra floor area is needed.

The electromagnetic active suspension is used for being connected between a vehicle body and wheels of a motor vehicle and is characterized in that the electromagnetic active suspension comprises an electromagnetic actuator and a magnetorheological damper, the electromagnetic actuator is a linear motor, and the linear motor comprises a permanent magnet cylinder, a primary winding and a bearing connected with the permanent magnet cylinder and the primary winding; the magneto-rheological damper and the linear motor are integrated in the same suspension assembly, the electromagnetic actuator and the magneto-rheological damper are integrated in the same suspension assembly, the integration level of the electromagnetic active suspension is greatly improved, the linear motor is adopted as a main power source, and structure compactness and function collaboration are achieved. The direct driving mode of the linear motor abandons a complex pipeline of a traditional hydraulic system, mechanical inertia is reduced, and the response frequency is greatly improved and far exceeds the upper limit of a hydraulic suspension. The invention further discloses a vehicle which adopts the electromagnetic active suspension, the adaptability of the vehicle under extreme working conditions such as cross-country and racing tracks can be improved, and the optimal balance between control and comfort is achieved.

The invention relates to the technical field of gas cutting devices, and discloses pipe double-end laser cutting equipment which comprises a rack, a plurality of material supporting centering mechanisms are arranged in the middle of the rack, laser cutting mechanisms are arranged at the two ends of one side of the top of the rack, and material clamping mechanisms are arranged at the two ends of the other side of the top of the rack. Linear motor modules matched with the laser cutting mechanism and the clamping mechanism are arranged on one side of the laser cutting mechanism and one side of the clamping mechanism and used for adjusting the positions of the laser cutting mechanism and the clamping mechanism on the rack; a plurality of feeding mechanisms are arranged on one side of the rack side by side, a plurality of discharging mechanisms are arranged on the other side of the rack side by side, and the discharging mechanisms and the feeding mechanisms are the same in structure. Cutting and clamping positions can be accurately adjusted, the flexibility and cutting precision of equipment are improved, automatic conveying and smooth discharging of pipes can be guaranteed, and therefore the production efficiency and the machining quality are further improved.

The invention relates to a vehicle control method and device, a vehicle and a storage medium. The method comprises the steps of determining an elevation curve and a road surface type of a driving track in front of a vehicle based on image information acquired in a vehicle driving process; if the road surface type of the front driving track is a special road surface, determining whether a front axle and / or a rear axle of the vehicle is driven into a special road surface area or not according to the running parameters and the static parameters of the vehicle; under the condition that a front axle and / or a rear axle of the vehicle is driven into a special road surface area and the special road surface is a pulse disturbance road surface, the vertical movement distance of a front axle electromagnetic suspension and / or a rear axle electromagnetic suspension of the vehicle is determined based on the elevation curve and the motion parameters of the vehicle; and according to the vertical movement distance of the front axle electromagnetic suspension, a front axle linear motor of the vehicle is controlled to output first control force, and / or according to the vertical movement distance of the rear axle electromagnetic suspension, a rear axle linear motor of the vehicle is controlled to output second control force, so that adjustment of the vehicle electromagnetic suspension is achieved, and the riding comfort is improved.

The invention discloses a real-time compensation control method and system for thrust fluctuation of a linear motor, and belongs to the technical field of linear motors, and the method comprises the steps: collecting a hybrid fluctuation source in the operation process of the linear motor, splitting the hybrid fluctuation source, and generating independent geometric nonlinear fluctuation signals; further screening the mixed fluctuation source, screening out a non-geometric nonlinear fluctuation signal, and preprocessing the non-geometric nonlinear fluctuation signal; establishing an independent compensation strategy, and respectively performing targeted compensation on geometric nonlinear fluctuation and non-geometric nonlinear fluctuation; and establishing a feed-forward compensation network, inputting the compensation strategy into the feed-forward compensation network, predicting a fluctuation component, and performing pre-compensation processing in advance. In the implementation process of the technical scheme provided by the invention, the pertinence and effectiveness of a compensation strategy are ensured through precise splitting and preprocessing of the hybrid fluctuation source, and meanwhile, the compensation amount is adjusted in real time by using the prediction function of the feedforward compensation network, the thrust fluctuation is remarkably reduced, and the operation stability of the linear motor is improved.

The invention relates to the technical field of special equipment for semiconductor devices, and particularly discloses a floating stator damping device and method.The floating stator damping device comprises a driving mechanism and a damping mechanism, the driving mechanism comprises a machine table and a driving linear motor which are slidably connected, and the damping mechanism comprises a damping linear motor slidably connected with the machine table and a damping encoder fixed to the machine table; a rotor of the damping linear motor is connected with a stator of the driving linear motor, and the rotor of the damping linear motor is provided with a damping grating ruler; the damping encoder and the damping grating ruler measure the movement position and speed of the stator of the driving linear motor under the counter-acting force, and the damping linear motor enables the stator of the driving linear motor to move in the direction opposite to the counter-acting force so as to offset the counter-acting force and achieve active damping. By the adoption of the technical scheme, the technical problem that in the prior art, passive vibration isolation is achieved by designing a damping device and a flexible device with fixed parameters, it is difficult to adapt to changes of counter-acting force, and consequently the damping effect is unstable can be solved.

The invention discloses a blood volume detection device and method based on a brain angiography image, and relates to the technical field of blood volume detection of the brain angiography image, the blood volume detection device comprises a detection device body and a substrate, the top surface of the substrate is fixedly provided with a lifting platform, and the surface of the top end of the lifting platform is fixedly provided with a workbench; and the linear motor is installed in the middle of the top face of the workbench, and a movable bed plate is horizontally and fixedly installed on the movable end face of the top of the linear motor. According to the blood volume detection device and method based on the brain angiography image, displacement compensation closed-loop control is achieved through the fine adjustment feedback module of the adjusting mechanism, and the gear meshing clearance compensation error is reduced; the LSTM network and the hybrid FEM-LBM algorithm are cooperatively optimized, the blood flow calculation speed is multiplied, an isolation telescopic sleeve shell and a shielding plate are arranged to form a composite shielding layer, the radiation leakage amount is reduced, the radiation monitoring module achieves real-time alarm of dose exceeding, and the protection level is improved.

The invention discloses an aluminum alloy hub spinning die cooling device and method, and relates to the technical field of hub machining. The device comprises a bottom plate, a double-rotor linear motor module is fixedly connected to the top of the bottom plate, supporting frames are fixedly connected to the tops of the two driving ends of the double-rotor linear motor module, and adjusters are fixedly connected to the side faces of the supporting frames. Through cooperation of the roller, the rotating notch ring, the adjusting block, the supporting J-shaped block, the supporting sliding block, the elastic roller, the pressure meter and the plug pin, when the surface of the roller cracks or peels off, the elastic roller can drive the supporting sliding block to apply pressure to the detection end of the pressure meter, and whether the surface of the roller cracks or peels off or not can be obtained by observing the numerical value of the pressure meter; therefore, the situation that the size and the shape of a hub deviate due to uneven pressure distribution on a hub blank caused by an irregular contact surface generated by cracks or peeling of the surface of the roller and the hub is avoided.

The invention provides a circular pool wave making system and a wave making and absorbing method, and belongs to the technical field of ocean engineering equipment.The circular pool wave making system comprises a plurality of wave maker units distributed around the circumference of a circular pool at equal intervals; the wave maker unit comprises a linear motor; the linear motor is connected with a floater through a connecting rod; the linear motor is connected with the driver, the driver is connected with the upper computer, the upper computer sends a control command to the driver, and the floater floats on the water surface and has a motion freedom degree of vertical translation. By controlling the movement of each wave maker unit in the circular pool wave making system, full-circumferential wave making is realized, regular waves, irregular waves, rotating waves, annular focused waves and other focused waves in any shape can be made, and meanwhile, waves propagated to the periphery of a pool are absorbed based on an active wave absorbing technology, so that the wave making efficiency is improved. Therefore, various wave making requirements, including simulation of real sea conditions and wave making of extreme sea conditions, are met.

The utility model relates to the technical field of testing equipment, and provides a connector micro-motion abrasion testing machine which comprises a first mounting base, a second mounting base and a linear motor, the first mounting base and the second mounting base are arranged in a spaced mode in the first direction, one of the first mounting base and the second mounting base is used for mounting a male end of a connector, and the other of the first mounting base and the second mounting base is used for mounting a female end of the connector. The other one of the first mounting seat and the second mounting seat is used for mounting a female end of the connector; at least one of the first mounting base and the second mounting base is connected with the corresponding linear motor so that the first mounting base and the second mounting base can get close to each other or get away from each other in the first direction. According to the connector micro-motion abrasion testing machine, at least one of the first mounting seat and the second mounting seat is connected with the corresponding linear motor, so that the linear motor is used for driving the first mounting seat and the second mounting seat to be close to or far away from each other in the first direction, a lead screw nut mechanism is not needed for transmitting power, and the precision is relatively high during driving; and the accuracy of a test result can be improved.

The invention belongs to the field of linear motor platforms, and particularly relates to a linear motor marble platform which comprises a marble platform body, a Y-axis linear module is arranged on one side of the upper end face of the marble platform body, a second moving seat is arranged on the Y-axis linear module, and an X-axis linear module is arranged on one side of the upper end face of the marble platform body. A first moving seat is arranged on the X-axis linear module, a Z-axis linear module is arranged on the first moving seat, and a third moving seat is arranged on the Z-axis linear module. By means of the welding auxiliary mechanism, a plurality of stacked branch pipes can be converted into a vertically-arranged state, the ends of the branch pipes are accurately aligned with the connecting holes of the main pipes, and then welding is conducted. Compared with the mode that an automatic clamping structure is adopted to clamp the branch pipes from the branch pipes stacked in the container to achieve connection with the main pipe, the situation that accurate clamping is difficult to achieve due to the fact that the branch pipes are stacked irregularly is avoided, and the welding efficiency can be improved.

The invention provides a decoupling type parallel swing platform which comprises a fixed platform, a movable platform, a first driving branch and a second driving branch, the movable platform is movably connected in the fixed platform, one end of the first driving branch and one end of the second driving branch are connected to the fixed platform, and the other end of the first driving branch and one end of the second driving branch are connected to the fixed platform. The other end of the first driving branch and the other end of the second driving branch are connected to a cross-shaped swing rod of the movable platform respectively, the PC outputs signals to a driver through a serial port to drive the first linear motor and the second linear motor to move, then the parallel-connection swing platform is driven to move, and the swing angle measuring system captures the motion swing angle of the parallel-connection swing platform and measures the swing angle of the parallel-connection swing platform. And the information is fed back to the PC to complete control. According to the parallel swing platform, structural decoupling is achieved, rotation around the X axis and rotation around the Y axis can be considered respectively, different linear motors can be controlled conveniently, the control difficulty is reduced, and the control precision is improved conveniently.

The invention belongs to the technical field of transformer heat dissipation, and particularly relates to a power transformer heat dissipation device with an alarm function, which comprises a protection assembly, an adjusting device is mounted in an inner cavity on one side of the protection assembly, a heat dissipation assembly is mounted on the adjusting device, and the adjusting device can drive the heat dissipation assembly to slide up and down in the height direction of the protection assembly. The heat dissipation assembly can slide up and down in the shell through cooperation of a linear motor sliding rail and a linear sliding block, a corrugated pipe is arranged on the heat dissipation assembly in a communicating mode, and the exhaust end of the corrugated pipe is movably arranged in a hole formed in the intersection position of sliding holes formed in the longitudinal swing plate and the transverse swing plate in a penetrating mode. The multiple sections of meshing teeth arranged on the vertical plate are matched with the gear to drive the exhaust end of the corrugated pipe to swing up and down, meanwhile, the sliding ring arranged on the insulation guide rod in a sleeving mode is matched with the linkage rod to drive the exhaust end of the corrugated pipe to swing left and right, cold air is evenly dispersed to all positions of the shell, and it is ensured that electric appliance elements in the shell are evenly cooled.