24 results about "Switching table" patented technology

The utility model discloses an automobile seat table board button endurance test bench, which relates to the technical field of automobile seat table board button tests and comprises a movable workbench and a pneumatic mechanism arranged on the workbench and used for opening and closing a table board. The pneumatic mechanism comprises a base connected with the workbench, a vertical arm arranged on the base, an upper sliding block, a lower sliding block, an upper air cylinder arranged on the upper sliding block, a disc arranged on the front portion of the upper air cylinder and used for unlocking a table board button, and a lower air cylinder arranged on the lower sliding block, wherein the upper sliding block and the lower sliding block are arranged on the vertical arm in a sliding mode. The rotating wheel is arranged at the front part of the lower cylinder and used for closing the table board; the device can reproduce the use scene of the seat table plate, is simple and convenient to set, can save the working time of an operator, is small in occupied space, is convenient to move, can enter a temperature and humidity test box, and can carry out a test task according to standard environmental requirements.

The invention discloses an underground tunnel unmanned transport vehicle capable of autonomous cruise, and belongs to the technical field of automation equipment, and the installation mechanism comprises an outer shell which is installed on the unmanned transport vehicle, the front side of the outer shell is provided with a receding groove, and the shape of the receding groove is consistent with the shape of an RFID tag; the installation platform is installed at the tail of the unmanned transport vehicle, the two sides of the installation platform extend towards the two sides of the unmanned transport vehicle, the two outer shells are installed at the ends of the two sides of the installation platform, and the front sides of the outer shells face the two sides of the unmanned transport vehicle; the switching table is rotatably mounted on the outer shell; the mechanism integrates punching and mounting functions, is accurate in positioning and continuous and reliable in operation, remarkably improves the mounting efficiency and quality of the RFID tag in a narrow tunnel environment, and reduces the risk of manual operation.

The invention discloses an exchange table protection mechanism and a horizontal machining center, and the exchange table protection mechanism comprises a protection cover; the cylinder assembly comprises a cylinder body and a cylinder cover plate, the cylinder cover plate is fixedly connected to the upper surface of the protective cover, and the cylinder body penetrates through the upper surface of the protective cover and the cylinder cover plate; the upper surface of the exchange door is fixedly connected with the cylinder body; the upper surface of the exchange arm is fixedly connected with the lower end of the exchange door, and the exchange arm is used for jacking up the exchange door; the connecting rod assembly comprises a connecting rod body, a first connecting assembly and a second connecting assembly, the connecting rod body penetrates through the first connecting assembly and the second connecting assembly, the first connecting assembly is fixedly connected with the upper surface of the protective cover, and the second connecting assembly close to the cylinder body is fixedly connected with the cylinder body; the chip blocking plate is fixedly connected with the second connecting assembly. In this way, the sealing performance of the horizontal machining center can be enhanced, and the stability of the horizontal machining center during workpiece machining is improved.

The utility model discloses a rapid switching table and relates to the technical field of conveying equipment. The stand comprises a cuboid frame, first fixed cross rods and second fixed cross rods, a plurality of parallel first fixed cross rods are fixed at the upper end of the cuboid frame, and a plurality of parallel second fixed cross rods are fixed on one side of the cuboid frame; each bent pipe comprises a bent pipe body, a first U-shaped bolt, a second U-shaped bolt and a stock bin discharging port, a plurality of bent pipe bodies are fixed to each first fixing transverse rod through the first U-shaped bolts, and the outer wall of the other end of each bent pipe body is fixed to the corresponding second fixing transverse rod through the corresponding second U-shaped bolt. The two ends of the bent pipe body are connected with a stock bin discharging port and a quick connector respectively. According to the rapid switching table, the number of pipelines and valves in the pipelines is greatly reduced, the design of electrical programs is simplified, later maintenance is facilitated, production cost and maintenance cost are saved, and the rapid switching table is stable and reliable in structure, quite convenient to operate, economical and practical.

The invention relates to the technical field of gantry machining equipment, and particularly provides an exchange table mechanism for a gantry machining center, which comprises an exchange table, a translation device, a positioning device and a clamping device, the translation device is used for driving the exchange table to move between the working frame and the preparation frame, the translation device comprises a first driving assembly, a second driving assembly and a bottom plate, the first driving assembly is arranged on the preparation frame, and the bottom plate is arranged on the preparation frame in a sliding mode; the length direction of the bottom plate is consistent with the moving direction of the exchange table, and the first driving assembly is used for driving the bottom plate to move between the preparation frame and the working frame; according to the structure, the stroke of the exchange table is divided into two sections, different driving assemblies are used for driving the exchange table to move, the stroke driven by a single driving assembly is reduced, and the situations that due to the fact that the stroke of the single driving assembly is too large, friction loss of elements is caused, and the exchange table is not pushed in place are avoided.

The invention discloses a two-phase open-circuit fault-tolerant control strategy under a minimum copper loss constraint of a dual three-phase SynRM, and the strategy comprises the steps: respectively deducing the synthetic magnetomotive force of a residual winding, constructing a quadratic optimization model with linear constraint, and optimizing the current amplitude for the open-circuit faults of orthogonal and non-orthogonal two-phase windings, so as to enable the direction of the synthetic magnetomotive force to meet the requirements; establishing a static coordinate and a rotation transformation matrix after the fault, and performing orthogonality correction; a virtual voltage vector is synthesized based on weighted superposition of the original vectors, and a corresponding virtual voltage vector set is constructed for the two faults; and on the basis of the corrected transformation matrix and the virtual voltage vector set, constructing a voltage vector distribution diagram and a switch table in a fault state, dividing an alpha-beta subspace into 16 sectors, and selecting an optimal virtual voltage vector to realize accurate control of the flux linkage amplitude and the electromagnetic torque. Stable operation of the motor can be maintained, and the fault-tolerant capability and the operation reliability of the system are remarkably improved.

The application discloses a material conveying system. The material conveying system comprises a first conveying device, a second conveying device, a switching device and a transmission mechanism, the first conveying device is used for conveying materials in a first direction, the second conveying device is used for conveying materials in a second direction, the switching device is connected with the first conveying device and the second conveying device, the switching device comprises a switching table and conveying pieces, and the first conveying device and / or the second conveying device is used for driving the transmission mechanism to move, so as to drive the plurality of conveying pieces to rotate, so that the conveying pieces convey the materials from the first conveying device to the second conveying device through the switching table. In this way, the first conveying device and / or the second conveying device is arranged to drive the transmission mechanism, so as to drive the conveying pieces, so that the materials can be transported on the switching table, the number of motors on the switching table is reduced, the torque of the switching table is reduced, the problem of poor transportation of the switching table is solved, and the working efficiency of the material conveying system is improved.

The application discloses a kind of switch protection section automatic generation method, it is related to switch generation technical field in rail transit, including the following steps: S1, the data structure of switch table is configured;S2, the fuzzy distance of secondary detection equipment characteristic table, the distance between train second axle and train front section of train characteristic table and the distance between train head and front section are configured;S3, the minimum locking distance of switch rear positioning direction distance switch tip of switch and the minimum locking distance of switch rear reverse direction distance switch tip are configured;S4, the minimum locking distance of switch front positioning direction distance switch tip of switch is configured;S5, in COE turn-back area table, the data structure of each turn-back area is configured;S6, the search distance of switch intrusion area before switch is generated;S7, the track section list of dead lock area of switch and the track section list of intrusion area are generated.The application automatically realizes the search of the protection area of each switch, including dead lock area and intrusion area.

The invention relates to the technical field of clamping mechanism switching, and discloses an intermediate shaft workpiece clamping manipulator and workpiece frame manipulator switching mechanism which comprises a signal acquisition assembly and a switching assembly. The switching assembly comprises a switching table, an intermediate shaft workpiece clamping manipulator and a workpiece frame manipulator, the intermediate shaft workpiece clamping manipulator and the workpiece frame manipulator each comprise a mounting plate, a pneumatic quick connection female end and a pneumatic quick connection male end fixedly mounted at the tail end of the arm robot are fixedly mounted in the center of each mounting plate, and after the workpiece frame on the uppermost layer does not contain an intermediate shaft, the pneumatic quick connection female ends are connected with the pneumatic quick connection male ends fixedly mounted at the tail end of the arm robot. The tail end of the arm robot is replaced with a workpiece frame mechanical arm, and the workpiece frames on the uppermost layer are all moved away; afterwards, the tail end of the arm robot is replaced with an intermediate shaft workpiece clamping mechanical arm, and the purpose of automatically detecting the intermediate shaft of the next layer after all the intermediate shafts of the upper layer are detected is achieved.

The intelligent welding and grinding all-in-one machine for precision machining comprises a machining box body, an adjusting motor is installed in the machining box body, the top of the adjusting motor is rotationally connected with a switching table, and the top side of the switching table is provided with a third driving motor and a second driving motor. The top of the third driving motor and the top of the second driving motor are connected with a first machining table and a second machining table correspondingly, the top of the second machining table is provided with a workpiece chuck and a protective cover, and the protective cover is provided with a collecting assembly. The collecting assembly comprises a collecting pipe embedded in the protective cover, a one-way valve is arranged on one side of the collecting pipe, a plurality of air inlets are formed in the collecting pipe, multiple sets of through holes are annularly formed in the inner wall of the protective cover, the protective cover is located on the outer side of the workpiece chuck, and a welding mechanism and a grinding mechanism are arranged at the top of the first machining table and the top of the second machining table correspondingly. The device can improve the continuity of workpiece welding and grinding machining, so that the production efficiency of workpieces is improved.

The utility model provides a riveting tool for safety box processing, which comprises a track, a switching table is slidably connected to the track, an X-direction workbench is slidably connected to the switching table, the X-direction workbench is driven to move by a servo motor I, a Y-direction workbench is slidably connected to the X-direction workbench, and the Y-direction workbench is driven to move by a servo motor II. The Y-direction working table is driven by a second servo motor to move, four punching columns are arranged on the Y-direction working table, a rotary downward-pressing air cylinder is further installed on the Y-direction working table, a cross arm is installed on a piston rod of the rotary downward-pressing air cylinder, a pressing block is installed on the cross arm, an adjusting base is further connected to the track in a sliding mode, and the adjusting base is provided with a clamping groove. A first locking screw is connected to the adjusting base in a threaded mode, a cross beam is connected to the adjusting base, an electromagnet is installed on the cross beam, an iron sheet matched with the electromagnet is installed on the switching table, and a handle is further installed on the switching table.

The invention relates to the technical field of vibration tests, in particular to a magnet roller vibration test device and method, and the device comprises a supporting structure, and a through hole is formed in the upper part of the supporting structure; a servo motor is arranged at the bottom of the supporting structure, a spline is arranged at the top of the servo motor, a fixing frame is arranged on the outer side of the servo motor, a driving shaft is connected to the other end of the spline, a switching table is arranged above the driving shaft, a commutator is connected to the other end of the switching table, a cam is arranged on one side of the commutator, and a material tank is arranged on the other side of the commutator. The material tank and the cam are located on the two sides of the through hole of the supporting structure respectively. According to the magnet roller vibration test device and test method provided by the invention, the orthogonal test table completes all tests of the combined working conditions of amplitude and rotating speed in sequence, and simulation software is adopted for reproduction verification, so that the scientific and reliable test method is finally formed, the test efficiency is improved, and the test cost is reduced.

The invention provides a staggered interconnection type fault-tolerant power converter for a switched reluctance motor and a control method of the staggered interconnection type fault-tolerant power converter, and relates to the technical field of power electronics. The four-phase winding structure adopts a staggered interconnection layout, and the power switch module is composed of one-way power transistors and two-way isolation switch tubes. A redundant current path is constructed between adjacent phases, and reverse excitation, follow current and demagnetization current paths are reconstructed when an open-circuit fault occurs, so that continuous operation of the motor is maintained. And the control module predicts flux linkage and torque based on the rotor position and the phase current, selects an optimal switch combination from the fault-tolerant switch table by using an evaluation function, and realizes torque tracking and fault-tolerant control under normal and fault working conditions. According to the invention, the operation reliability and fault-tolerant performance of the system are improved.

This invention belongs to the technical field of workbench structure, specifically providing a drive structure for an exchangeable workbench. It includes a base with an internal drive cavity, a drive shaft rotatably mounted within the drive cavity, and several needle rollers arranged in a circumferential array fixedly connected to the drive shaft. A camshaft, capable of sliding up and down and rotating, is located within the drive cavity. A camshaft guide rail, cooperating with the needle rollers, is provided on the camshaft. The camshaft guide rail includes a lifting section, a rotating section, and a lowering section connected sequentially from end to end. The bottom of the drive shaft extends through the drive cavity and is fixedly connected to the output end of a drive device. The bottom of the camshaft extends through the drive cavity and into a damping buffer cavity. A buffer spring is fixedly connected to the bottom of the damping buffer cavity. A chuck at the top of the buffer spring is rotatably connected to a connecting plate at the bottom of the camshaft. A camshaft limiting assembly is also provided within the damping buffer cavity. The top of the camshaft extends through the base and is fixedly connected to the workbench. This structure is compact, reliable in operation, and has built-in buffer protection, enabling smooth movement of the workbench.

The application provides a field weakening method of a permanent magnet synchronous motor based on sector offset, and belongs to the technical field of motor control. The field weakening method is suitable for a field weakening method using a control algorithm of a switching table, and achieves the effect of field weakening by changing d-q axis voltage distribution. The field weakening method comprises the following steps: S1, observing a load via a load torque observer; S2, substituting a required maximum motor speed and the observed load into a formula to calculate a sector offset; S3, inputting the calculated sector offset into a switching table to perform sector offset; and S4, inputting an electromagnetic torque signal into the switching table, outputting a switching signal via the offset sector, and further controlling the motor. The application provides a field weakening method of a permanent magnet synchronous motor based on sector offset, the d-q axis voltage distribution is changed by rotating the sector clockwise, the offset can be calculated according to the maximum motor speed, an analytical solution is obtained, the method is suitable for algorithms such as flux linkage closed loop direct torque control, and the field weakening effect is excellent in the whole speed range.

The invention relates to the technical field of part positioning, in particular to a switching system for part positioning and a switching method thereof, and the system comprises a flexible positioning skid and a switching table device; the flexible positioning skid comprises a rolling base, the rolling base is provided with a plurality of flexible guiding and positioning devices, and the flexible positioning skid further comprises a clamping part, a positioning assembly, a pneumatic locking piece, an air receiving part and a first butt joint mechanism. The switching table device comprises a guide rail piece, the guide rail piece is provided with a plurality of displacement switching devices, and the switching table device further comprises a clamping mechanism, a ventilation mechanism and a second butt joint mechanism; the switching system further comprises an in-place detection assembly in communication connection with the control device. The method comprises the steps that the rolling base is in butt joint with the guide rail piece; the displacement switching device moves, coarse positioning and fine positioning are conducted through the in-place detection assembly, the clamping mechanism and the clamping part conduct clamping, and the pneumatic locking piece is unlocked; the clamping mechanism drives the positioning assembly to achieve position switching. The part positioning and conveying efficiency can be improved.

This invention relates to a model predictive current control method for a three-level inverter permanent magnet synchronous motor, comprising: establishing a new voltage space vector table; obtaining the electrical angle θ(k) and electrical angular velocity ω(k) of the permanent magnet synchronous motor at time k, and obtaining the stator current dq-axis component i. d (k) and i q (k); obtain the q-axis reference current i q * Given the d-axis reference current i d * =0; This yields the voltage space vector values ​​u along the α and β axes. α (k) and u β (k); Determine the sector where the voltage space vector is located, select the optimal voltage space vector, and then output the switching sequence through the switching table. This invention effectively suppresses common-mode voltage by discarding voltage space vectors with large common-mode voltages; by constructing a virtual voltage space vector, it effectively suppresses midpoint potential fluctuations, predicts the reference voltage space vector in the next cycle, reduces the selection range of candidate voltage space vectors, and greatly reduces the amount of computation.

The invention discloses a switchable carbon nanotube filter device, which comprises a rack, a switching mechanism is arranged in the rack, and the switching mechanism comprises a switching table rotationally connected with the rack, a baffle ring and a reaction barrel fixedly mounted on the switching table, and a rotating shaft fixedly connected with the switching table; the filtering mechanism is arranged in the rack and comprises an electric push rod fixedly connected between the rack and the movable table, a filtering barrel driven by a first motor and a protective barrel arranged on the outer side of the filtering barrel in a covering mode, a connecting frame is fixedly connected to the outer side of the protective barrel, and a supporting ring is fixedly installed on the connecting frame; the limiting mechanism is arranged below the movable table and comprises a fixed block fixedly connected with the movable table, a rack fixedly connected between the fixed block and the guide plate, a gear meshed with the rack and a rotating shaft fixedly installed in the gear. According to the switchable filtering device disclosed by the invention, the filtering barrel and the protective barrel can be disassembled at the same time, so that the filtering barrel can be quickly replaced.

The utility model discloses a life raft vacuum bag switchable double-shape heat sealing device which comprises a working table, a control box is fixedly connected to the rear side of the working table, an operation box is fixedly connected to the middle of the upper end of the control box, and an air pressure heat sealing plate is assembled on the operation box. A switching table is assembled at the upper end of the workbench and located on the lower side of the air pressure heat-sealing plate, the pushing air cylinder pushes and switches the lower heat-sealing plate to replace the lower heat-sealing plate, after replacement is finished, the air pressure rod drives the heat-sealing plate to conduct heat-sealing operation again, and after delay time is reached, the PLC controls the air pressure rod and the pushing air cylinder to return to the original positions. At the moment, the delay meter carries out delay timing, and next thermal synthesis operation is carried out after the delay time is over, so that the switching of the lower thermal synthesis plate can be carried out, and the thermal synthesis operation of different shapes at different parts of the life raft vacuum bag is facilitated.

The invention relates to a current switching control method and system for a Z-source inverter of a photovoltaic power generation system, and the method comprises the steps: building a current switching affine model based on the Z-source inverter in the photovoltaic power generation system; establishing a current error switching affine model according to the current switching affine model; based on the current switching affine model and the current error switching affine model, establishing a plurality of subsystems of the Z-source inverter; establishing a switching table according to the plurality of subsystems of the Z-source inverter; and determining the states of an upper switching tube and a lower switching tube in the Z-source inverter in the next control period according to the switching table through a preset switching rule. The method has the advantages that the working state of the Z-source inverter in the photovoltaic power generation system can be accurately described, the switching states of the Z-source inverter in different control periods can be directly selected based on the switching rule, complex coordinate transformation and pulse width modulation processes are not needed, no control parameters exist, and high robustness is achieved under the condition that circuit parameters are uncertain.

The utility model discloses a punching machine for processing an electrostatic guide rail, which comprises a base device, a lifting device is arranged at the top of the base device, and a switching device is arranged at the top of the lifting device; the switching device comprises a connecting frame, and two reinforcing discs are rotationally arranged at the bottom of the connecting frame; according to the punching machine for machining the electrostatic guide rail, due to the design that the second motor drives the switching table to rotate, the punches can be conveniently and rapidly switched, the lead screw drives the assembly to move back and forth once, two-wheel different punching can be carried out on the assembly, a positioning assembly does not need to be installed again in the process, the machining speed is increased, machining convenience is enhanced, and the production efficiency is improved. Complex machining requirements can be met conveniently, coordinates are not changed after the punches are switched, re-positioning is not needed, and machining accuracy is improved. And through the design that the hydraulic cylinder drives the reinforcing rods to be inserted into the reinforcing disc, the stability of the switching table is improved, machining precision is prevented from being affected by too large stress between the reinforcing disc and the connecting frame during punching, and the service life of the device is prolonged conveniently.

The invention provides soil detection and collection equipment, belongs to the technical field of soil detection, and mainly aims to solve the problem that existing collection equipment is often inconvenient to collect soil in different areas, the soil detection and collection equipment comprises an equipment main body, two crawler belt driving mechanisms are arranged on the two sides of the equipment main body respectively, and a mounting table is arranged at one end of the equipment main body; a first rotating mechanism is arranged on one side of the mounting table; an acquisition connecting plate is arranged on the screw rod sliding table; a switching table is arranged at the bottom of the acquisition connecting plate; an acquisition assembly is arranged at the bottom of the switching table; a control module is arranged at the top of the equipment body, through arrangement of the collecting assembly, soil can be collected, the collected soil can be put into the collecting assembly to be collected, through cooperation of the collecting assembly and the collecting assembly, soil in different areas can be collected, and convenience is improved.

The present application relates to the technical field of manipulator, and especially relates to an assembly part grabbing quick-change device and method. The assembly part grabbing quick-change device comprises a mechanical arm component, a sensor component connected to an execution end of the mechanical arm component, and a clamping component connected to the sensor component. The clamping component comprises a visual switching assembly, a motor locking mechanism, and at least one set of end effectors. The visual switching assembly is connected to the sensor component, and the visual switching assembly is automatically locked or disconnected with any end effector through the motor locking mechanism. The effector switching table comprises at least two placement positions for placing the end effectors. The assembly part grabbing quick-change device and method are used to solve the defect that the traditional quick-change device is prone to polluting the clean environment, to realize high-precision and high-adaptability quick grabbing operation of multiple specifications of cavities in the clean environment, and to realize clean grabbing, accurate positioning and pollution-free assembly of different types and sizes of assembly parts.

The utility model discloses an edge cutting device for metal die casting machining, which comprises an edge cutting table, a limiting track is fixedly arranged in the middle of the edge cutting table, a switching mechanism is fixedly arranged on one side of the limiting track, the surface of the switching mechanism is in threaded connection with a switching table, a supporting frame is fixedly arranged in the middle of the top surface of the edge cutting table, and a supporting rod is fixedly arranged on the supporting frame. And an edge cutting mechanism is fixedly mounted on the top surface of the supporting frame. According to the edge cutting device for metal die casting machining, through the arrangement of the switching mechanism and the edge cutting mechanism, a metal die casting is placed on a lower die, a hydraulic cylinder is started, an upper edge cutting die is driven to press downwards, edge waste of the metal die casting is cut off, and after edge cutting of one metal die casting is completed, a servo motor A drives a threaded lead screw to rotate; according to the metal die casting edge cutting device, the next metal die casting is conveyed to the position below the upper edge cutting die to be subjected to edge cutting, in the edge cutting process, personnel can place or take down the metal die casting on the lower die, the waiting time is shortened, and the working efficiency is improved.