357 results about "Electromagnetic brake" patented technology

The invention relates to the technical field of friction materials, and particularly discloses an electromagnetic brake friction material prepared from granules and a preparation process of the electromagnetic brake friction material in order to solve the problem that an existing electromagnetic brake friction plate is difficult to prepare or insufficient in performance. The reinforcing material comprises plasma modified aramid pulp, coupling modified composite mineral fibers, SiO2 coated tetrapod-like zinc oxide whiskers and carbon fiber-aluminum silicon whiskers; the filler comprises modified needle-like wollastonite and organic modified precipitated barium sulfate; the adhesive comprises boron-silicon synergistic modified phenolic resin and modified carboxy nitrile rubber. The raw materials are improved, and granules are prepared by adopting a mixing and crushing process, so that the content of an adhesive can be greatly reduced, meanwhile, the die filling efficiency can be improved, the die thickness and the high-temperature heat fading of the friction material can be reduced, a cold press molding process can be omitted, and the qualification rate of finished friction materials can be improved.

The utility model relates to the technical field of electromagnetic brake production, in particular to electromagnetic brake friction surface machining equipment which comprises a workbench, a supporting frame, an electric guide rail, a clamping assembly and a polishing assembly, the upper end face of the workbench is connected with the supporting frame, a groove is formed in the workbench, and the electric guide rail is connected into the groove; the clamping assembly is connected to the moving end of the electric guide rail, and the grinding assembly is connected to the supporting frame. According to the friction plate clamping device, when the clamping ends of the clamping assembly are in the use state, the multiple clamping ends can synchronously move towards the circle center position, friction plates to be machined are clamped and fixed through movement of the multiple clamping ends, meanwhile, when the friction plates with different thicknesses are machined, the height of the moving end in the height adjusting assembly can be adjusted, and the friction plates with different thicknesses can be clamped and fixed. And after the height of the moving end is changed, the height of the clamping end is also changed, so that the situation that the clamping end is higher than the friction plate to affect normal grinding is prevented.

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic hydraulic braking structure and electric control electromagnetic hydraulic braking calipers. The electromagnetic hydraulic braking structure comprises a combined piston assembly, the combined piston assembly comprises a piston cylinder, the piston cylinder is provided with a first piston cavity and a second piston cavity which are communicated with each other, the first piston cavity is provided with a combined outer piston and a combined inner piston in a penetrating mode, and the second piston cavity is provided with a pressurizing small plunger in a penetrating mode; an oil storage cavity is formed outside the piston cylinder, and a plurality of oil holes are formed in the side wall of the piston cylinder and are communicated with the first piston cavity and the oil storage cavity; the electromagnet assembly comprises an armature, and the armature abuts against the combined inner piston; and the hydraulic braking assembly is internally provided with an oil way and communicates with the second piston cavity, and multi-stage pressure amplification is achieved through double-cavity linkage. Gap fluctuation between the brake pad and the brake disc in the braking process can be effectively controlled, the characteristic of large suction force of the tail end of the electromagnet is efficiently utilized, and meanwhile the stable braking effect is achieved.

The invention is suitable for the technical field of brakes, and provides an energy-saving electromagnetic brake which comprises a stator and a flange plate, and a rotor capable of being matched with a target transmission shaft to synchronously rotate and an armature controlled by a coil and a spring are arranged in a gap between the stator and the flange plate; the spring can push the armature to be away from the stator so that the armature can abut against the friction plate for braking. The coil can attract the armature to approach the stator to separate the armature from the friction plate to cancel braking; a release plate used for limiting the armature is installed on the side, close to the flange plate, in the gap. The brake is provided with an external matching mechanism capable of controlling the release plate to limit or cancel limit of the armature, and the external matching mechanism adopts a push-pull type electromagnet. Therefore, the device can be kept in an open state without being electrified for a long time in an equipment operation working condition, so that unnecessary energy loss is reduced.

The invention discloses an integrated coil framework structure for an electromagnetic brake coil and a preparation method, the integrated coil framework structure comprises a coil wire spool and an integrated plug-in device, and the integrated plug-in device is vertically provided with a terminal accommodating cavity A and a terminal accommodating cavity B side by side towards a wire winding space; a wire passing clamping groove A is transversely formed in the upper portion of the terminal containing cavity A in a penetrating mode, a wire passing clamping groove B is transversely formed in the upper portion of the terminal containing cavity B in a penetrating mode, enameled wires are correspondingly wound in the winding space of the coil winding disc, and an inner connecting terminal A is inserted into the terminal containing cavity A in a matched mode. The first end of the enameled wire transversely penetrates through the wire passing clamping groove A and is electrically connected with the inner connecting terminal A inserted into the terminal containing cavity A. The inner connecting terminal A is provided with an external terminal inserting groove A. According to the invention, the integrated plugging device is formed and constructed on the end side of the coil wire spool, and through the integrated plugging device, centralized and accurate tightening and positioning of the starting end and the tail end of the enameled wire wound on the coil wire spool and riveting type tight positioning and electric connection of the inner connecting terminal and the enameled wire are realized.

The embodiment of the invention relates to the technical field of vehicle control, and discloses a vehicle door hovering control method and device and a computer readable storage medium. According to the embodiment of the invention, the motion state and trend of the vehicle door can be accurately obtained by detecting the motion characteristics of the vehicle door at the moment before hovering. Then, according to the feature range of the motion features, target equipment used for controlling the vehicle door to hover and corresponding working parameters are determined; therefore, the control strategy can be accurately adjusted according to specific conditions, and the problem caused by intervention of a single power supply driver and an electromagnetic brake is avoided. And a control instruction is generated based on the determined working parameters and sent to the target equipment, and the target equipment controls the vehicle door according to the working parameters. In this way, fine control over the vehicle door hovering process can be achieved, and shaking and abnormal sound during sudden stop are reduced. Meanwhile, due to the fact that control is more accurate, the force needed when the external force is started again can be correspondingly reduced, and the opening and closing experience of the electric vehicle door is improved.

This utility model discloses a simulation device for testing the functional interface circuits of a simulating mobility scooter. It includes a controller with various functional interfaces, a plastic housing for testing the simulation interfaces, and a circuit board for interface simulation control connectors. A power enable switch, a simulated manual brake switch, an electromagnetic brake switch, a speed switching mode switch, a speed control potentiometer, an adjustable resistor mounting position, a horn, a working status indicator light, and CAN converter connector terminals are all electrically connected to the interface simulation control connector circuit board. The controller connector terminals are electrically connected to the controller with its various functional interfaces via an adapter cable. The working status indicator light is used to detect and indicate whether the operation is normal. This device simplifies and reduces the cost of testing the controller's functional interfaces and allows for simulated monitoring of the lifespan of the simulating mobility scooter's functions after functional testing.

The application discloses a kind of passive and active hybrid controllable joint assisted buffering device for wearable exoskeleton.It includes joint upper and lower connecting rod, gyro angle sensor, power mechanism and upper and lower connecting rod binding mechanism;Power mechanism includes motor, electromagnetic clutch, electromagnetic brake, buffering mechanism, gear transmission mechanism;When active assistance, buffering mechanism and joint lower connecting rod are isolated by electromagnetic brake, active flexion / extension movement of joint is realized by motor and electromagnetic clutch, and joint energy is enhanced;When passive buffering, motor and joint are isolated by electromagnetic clutch, passive torque force is transmitted to joint movement by buffering mechanism through gear transmission mechanism by electromagnetic brake.The application can realize active assistance of human joint by controlling the on-off of clutch and brake, does not hinder joint free movement without assistance, can introduce buffering to protect joint and motor in sudden situation such as falling, and has better man-machine cooperation and wearing safety.

The application discloses a kind of wind generating set electromagnetic brake splines dismounting device and dismounting method, for dismounting spline;The dismounting device includes two thrust blocks, two sliders, two fixed blocks and two adjusting screws;Two thrust blocks are respectively arranged in the opposite sides of the top of yaw motor end cover of wind generating set, and are respectively located in the opposite sides of spline;The side of each thrust block towards spline is formed with a limit structure, and the top surface of the side of thrust block towards spline is wedge surface;The side of each thrust block away from spline is formed with mounting groove;Two sliders are respectively installed in the mounting groove of two thrust blocks;Two fixed blocks are detachably installed in the opposite sides of the top of yaw motor end cover, and are respectively located outside two sliders;Two adjusting screws are respectively connected with two fixed blocks in one-to-one correspondence in horizontal direction by screw thread.This application can effectively solve the problems of limited spline dismounting space, poor centering effect, easy damage to components, insufficient universality and the like.

The invention relates to an eVTOL nacelle tilting steering engine based on high reduction ratio transmission and a working method, and relates to the field of electric vertical take-off and landing aircrafts. According to the technical scheme, the design that the double-cycloid speed reducer is combined with the parallel shaft speed reduction gear set is adopted, the wiring harness passing ability problem from the aircraft end to the nacelle is solved, the single-point failure risk that a lead screw of a traditional linear steering engine is stuck is avoided, and the safety and reliability of the steering engine are improved; moreover, depending on the dual-redundancy winding, the dual-redundancy electromagnetic brake and the dual-redundancy rotating speed feedback of the dual-redundancy servo motor, the dual-redundancy design is realized from the electrical level, and the safety performance is further enhanced. In addition, external disturbance can be reduced through high-reduction-ratio transmission, the influence of aerodynamic load disturbance on nacelle actuation is reduced, and the tilting stability is greatly improved.

The utility model discloses a warm-keeping and cooling device for traditional Chinese medicinal material planting, and relates to the technical field of traditional Chinese medicinal material planting. The warm keeping and cooling device for traditional Chinese medicinal material planting comprises a support, a temperature adjusting mechanism and a height mechanism, the temperature adjusting mechanism comprises a protection assembly arranged on the support and an adjusting assembly arranged in the support, the protection assembly is connected with the adjusting assembly in a clamped mode, a conveying box is arranged on the protection assembly, and an electromagnetic brake is fixedly connected to the conveying box. The height mechanism comprises a C-shaped fixing frame arranged on the support and a guide rod arranged on the C-shaped fixing frame, and the bottom of the inner side of the C-shaped fixing frame is fixedly connected with the guide rod. According to the mechanism, the constant-temperature heating rod is additionally arranged and matched with the fan for use, so that temperature rise adjustment can be conducted, the low-temperature environment can be improved, the situation that medicinal materials are frozen to death is avoided, in addition, the fan can prevent the situation that the temperature rise of the constant-temperature heating rod is too high, meanwhile, the protection assembly plays a role in protecting the adjusting assembly, and entering of dust and topsoil can be reduced.

The invention provides a cable rapid winding machine for cable processing, and belongs to the technical field of cable processing, the cable rapid winding machine comprises a base, a rapid circulation assembly and a rapid cylinder changing assembly, the rapid circulation assembly comprises a rotating rod rotatably connected to the interiors of two supporting plates, and the outer wall of the rotating rod is provided with a connecting cylinder; the cable winding device has the beneficial effects that during use, after one winding drum is fully wound with a cable, a controller opens an electric telescopic rod, the electric telescopic rod drives a connecting frame to move, the connecting frame drives a torque motor and a rhombic head to move, the rhombic head slides out of one rhombic groove, at the moment, the controller opens an electromagnetic brake motor, and the electric telescopic rod drives the connecting frame to move; the rotating rod rotates to drive the connecting cylinder to rotate, the connecting cylinder rotates to drive the auxiliary plate to rotate through the supporting frame, the auxiliary plate drives the winding drums in the auxiliary plate to rotate, the winding drums filled with cables are rotated to the rear portion, the empty winding drums are rotated to the front portion for work, and therefore the purpose of rapidly and circularly improving the working efficiency is achieved.

The utility model discloses an electromagnetic brake and drive assembly sealed with motor cooperation, and the electromagnetic brake includes the casing of one side open structure, and the casing open side is provided with the apron, and the casing is provided with armature and friction plate with apron, its characterized in that, the side of apron away from the casing is suitable for with motor cooperation, and the edge area of the side of apron away from the casing extends first flanging, and the end face of first flanging is suitable for with motor pressure, and the inner periphery of first flanging is provided with first sealing washer, wherein, the height of first sealing washer is greater than the height of first flanging. Thus, the first flanging and corresponding first sealing washer are arranged in the apron area of electromagnetic brake and motor cooperation, to seal the gap existing between the apron and motor end face. In this way, the output shaft of motor through to the first center hole of electromagnetic brake area is sealed in, can effectively prevent liquid or dust etc. from first center hole, keeps good sealing effect.

An electromagnetic brake control circuit is applied to an electromagnetic brake and a motor. The electromagnetic brake comprises an electromagnet; the electromagnetic brake control circuit comprises a microcontroller, a first transistor switch and a first diode. The microcontroller is configured to transmit a pulse width modulation signal to the first transistor switch to turn on or turn off the first transistor switch. When the electromagnetic brake control circuit is in a follow current stage of a driving mode, the first transistor switch is configured to be cut off by the pulse width modulation signal transmitted by the microcontroller, so that a coil driving current sequentially flows through the electromagnet and the first diode and then returns to the electromagnet; the electromagnetic brake control circuit is configured to drive the electromagnetic brake so that the electromagnetic brake stops braking the motor.

The present invention relates to the technical field of electric push rods. Disclosed is a novel intelligent electric push rod, specifically comprising an alternating-current permanent magnet motor and a push rod driven thereby. The alternating-current permanent magnet motor is provided with Hall sensors for detecting the position of a rotor of the alternating-current permanent magnet motor; and the electric push rod comprises at least one of an electromagnetic brake control unit, a wireless communication or wired communication unit, a power-off compensation braking unit, and a push rod stroke position detection unit. The electromagnetic brake control unit in the present invention achieves, in an electromagnetic brake manner, holding and braking of the push rod when current flows through windings of the alternating-current permanent magnet motor, thereby solving the problem of a self-locking failure caused by the reduction of a friction coefficient of a screw pair; additionally, the push rod stroke position detection unit achieves detection of the upper (lower) limit position of the push rod stroke, thereby avoiding the problems caused by a mechanical limit switch, and effectively improving the service life of a product; and the wireless communication or wired communication unit in the present solution can reduce the number of wire harnesses, thereby simplifying an assembly and wiring mode and a maintenance process.

The utility model provides a kind of electromagnetic brake, the electromagnetic brake includes the shell, clutch plate, friction disc and tail plate in turn stacked along preset path, the preset path is parallel to the axial direction of the shell, the shell is equipped with the elastic member and excitation coil acting on the clutch plate;Multiple first slots extending along its radial direction are opened on the clutch plate, the opening of the first slot extends to the outer ring of the clutch plate, and penetrates the clutch plate along the axial direction of the clutch plate, so that the clutch plate is composed of multiple action pieces evenly distributed around its axis;The elastic member includes multiple brake springs, multiple brake springs are one-to-one corresponding with the action piece Setting, and for abutting on the action piece. The electromagnetic brake provided by the utility model is more uniform to the friction effect of friction disc, reduces the local wear of friction disc;Metal powder accumulation in friction area can be reduced, so as to improve the service life of friction disc.

The invention discloses an adjustable equally-divided brake clearance electromagnetic brake motor, which comprises a rotor assembly and a brake assembly, and is characterized in that the rotor assembly is provided with a motor shaft rotatably mounted in a motor shell in a limiting manner; the brake assembly comprises a cover plate, a friction assembly, an armature, a brake coil, a magnet yoke, a reset spring and a brake spring, a reset spring is embedded between the friction assembly and the motor shaft, and the friction assembly can move towards the side close to the armature through resilience force of the reset spring. The magnet yoke and the cover plate are installed at a fixed distance, the armature is arranged between the magnet yoke and the friction assembly in an axially movable mode, the brake coil is arranged in an annular groove of the magnet yoke and located between the magnet yoke and the armature, and the armature and the friction assembly are close to or away from the magnet yoke by switching on and off the brake coil. And the friction assembly is limited through a first limiting part and a second limiting part at the tail part of the motor shaft, so that the friction assembly is located at a proper position. The problem of friction ring plate burning in the prior art can be effectively solved, and the replacement efficiency is improved.

The utility model relates to the technical field of brakes, and provides a permanent magnet drum type electromagnetic brake which comprises a machine shell, a stator, a reset element and a rotor and further comprises a permanent magnet magnetized in the radial direction, the rotor is arranged in the machine shell in a penetrating mode, the permanent magnet is fixedly arranged on the rotor in a sleeved mode, the stator is arranged on the outer side of the permanent magnet, and the reset element is connected between the stator and the machine shell. The stator is attracted by the permanent magnet to generate pressure during power loss, so that braking is formed; the magnetic force generated when the stator is electrified repels the magnetic force of the permanent magnet, the stator is pulled open by the reset element, and braking is relieved. Compared with a traditional drum-type electromagnetic brake, a mechanical force transmission structure is not needed, the structure is simplified, braking and braking releasing are achieved only through the action of a magnetic field, and the response speed is increased.

The utility model discloses an electromagnetic brake which comprises a friction plate connected to a motor, an armature and a brake disc which are arranged on the two sides of the friction plate, and a brake coil shell arranged on the side, away from the brake disc, of the armature, and an extension plate extends out of the side, facing the brake coil shell, of the brake disc. And the end part of the extension plate is matched with the end surface of the brake coil shell in a pushing manner so as to define mounting spaces of the friction plate and the armature. Thereby, the extension plate directly abuts the end face of the brake coil housing at its specific length as a reference length, which directly determines the total distance from the brake coil housing (reference surface) to the brake disc. Compared with the prior art in which one-by-one measurement is needed, multiple gaps between the friction plate and the brake disc, between the armature and the friction plate and the like are calculated to realize assembly. According to the embodiment of the invention, the overall space gap is limited based on the length of the extension plate, so that the assembly efficiency is remarkably improved, and the overall construction difficulty is effectively reduced.

The application discloses a new energy pure electric vehicle special electromagnetic brake assembly, comprising an electromagnetic thrust device and a hydraulic oil pump, the electromagnetic thrust device comprises a main shell, the main shell inner cavity is divided into an upper and lower structure electric control chamber and a thrust chamber by a thrust chamber partition plate, a brake electric control board is installed in the electric control chamber, an electromagnetic thrust device is installed in the thrust chamber, the hydraulic oil pump comprises a sealed oil pump shell, the oil pump shell inner cavity is divided into an upper and lower structure oil storage chamber and main piston chamber by an oil pump chamber partition plate, an oil return hole and an oil inlet hole are sequentially arranged on the oil pump chamber partition plate, a main piston is installed in the main piston chamber to divide the piston chamber into a main oil chamber and an auxiliary oil chamber. Through the above mode, the application can realize the active and passive brake function by inputting an electric signal to generate electromagnetic force, and the seamless switching and high response characteristics between the brake modes, so that the new energy pure electric vehicle and the development of unmanned driving technology have a more safe and reliable electronic brake technology and product matched with simple structure.

The invention provides a high-efficiency magnetic field optimization method for a wind power electromagnetic brake, and belongs to the technical field of wind power electromagnetic brakes. Air-gap magnetic field distribution is calculated by using a fast multi-pole expansion algorithm, and feedforward compensation is performed on coil excitation current through a Preisach inverse model adaptive identification algorithm to improve the uniformity of a magnetic field; an operator splitting method is adopted to solve a magnetic-thermal coupling problem, material parameters are corrected according to temperature, an optimization objective function including air gap magnetic flux density maximization, magnetic field uniformity minimization and temperature constraint is established, Latin hypercube sampling is utilized to generate a training data set, optimization iteration is carried out through a Kriging agent model in combination with an expectation improvement criterion, and a training result is obtained. And outputting the optimal design parameters. The technical problems that the calculation efficiency of the wind power electromagnetic brake in the magnetic field optimization process is low, and the hysteresis nonlinear characteristic and the multi-physical field coupling effect are difficult to accurately consider are solved.

The invention is applicable to the technical field of brakes, and provides an electromagnetic brake with pressure detection and a pressure detection method, and the electromagnetic brake comprises a stator, a flange plate, a coil, a spring, an armature, a rotor, a release plate and an external matching mechanism; the release plate can be driven by an external matching mechanism to limit the armature; when the release plate is in a non-limiting state, the release plate is in a braking state; when the release plate is in the limiting state, the armature is pushed by the spring to abut against the release plate and is in the to-be-braked state. In a braking state, the thrust of the spring to the armature is transmitted to the second sensor; in a to-be-braked state, thrust of the spring to the armature is transmitted to the first sensor; the controller records the stress of the first sensor in a to-be-braked state when the brake leaves a factory at an initial state, then compares the measured values with an initial value to obtain the elastic coefficient variation of the spring, eliminates the influence of the elastic coefficient variation on the basis of pressure data obtained by the second sensor, and controls the brake to be braked in the to-be-braked state. Therefore, the volume consumption of the friction plate can be measured and calculated.

The invention relates to the technical field of friction materials, in particular to a friction material for an electromagnetic brake capable of braking stably and quietly and a preparation method of the friction material, and aims at solving the problems of unstable braking, low precision and high noise in the braking process caused by the fact that an existing industrial robot is influenced by the friction material. Comprising 40-50 wt% of friction-increasing filler, 15-30 wt% of a reinforcing material, 8-12 wt% of an adhesive, 8-15 wt% of friction-reducing filler and 0.5-2 wt% of a compounding agent, according to the total mass of the friction material, the reinforcing material comprises 1-2wt% of PI / Al2O3 composite fiber, and the antifriction filler comprises 3-5wt% of polyketone and 3-5wt% of Ti4MoSiB2. According to the invention, through improvement of multiple raw materials and a preparation process thereof, and through a synergistic effect mechanism among the PI / Al2O3 composite fiber, polyketone, Ti4MoSiB2 and other components, the outstanding effects of noise reduction enhancement and the like can be realized on the basis of maintaining good friction performance.

The invention provides an electromagnetic brake control device which further controls an electromagnetic brake without delay. An electromagnetic brake control device (55), which controls an electromagnetic brake (54) that brakes the rotation of an AC motor (53) when the energization of an electromagnetic brake coil (54a) is cut off, is provided with: a rectifier (81), the DC side of which is connected to the electromagnetic brake coil (54a); a switching unit (84) that controls the power to the electromagnetic brake coil (54a) by switching a rectifier circuit (RL) connecting the rectifier (81) and the electromagnetic brake coil (54a) on and off; a DC converter (82) that is connected to the motor drive AC circuit (51a) and converts AC power to a predetermined DC voltage; an electromagnetic brake release circuit unit (85) that switches the switching unit (84) to an ON state by means of the DC voltage generated by the DC converter (82); and an electromagnetic brake operation command unit (83) that switches the switching unit (84) to the OFF state when the value of the current waveform of the AC motor (53) is between a positive threshold value and a negative threshold value and lasts for a predetermined determination time or longer.

The application discloses a rotor motor and relates to the technical field of motors, wherein the rotor motor comprises a rotor part, a stator part, an electromagnetic brake part and a sealing assembly; the stator part comprises a stator coil and is used for driving the rotor part to rotate; the electromagnetic brake part comprises a brake coil and a magnetic conducting sheet; the brake coil is used for driving the magnetic conducting sheet; the magnetic conducting sheet is used for abutting and braking the rotor part; the sealing assembly is rotationally sealed with the rotor part, is used for sealingly wrapping the abutting and braking area of the electromagnetic brake part and the rotor part, and is internally provided with a containing cavity for containing the debris generated by the abutting and braking. The rotor motor wraps the abutting and braking area of the electromagnetic brake part and the rotor part through the sealing assembly, and the containing cavity is arranged to contain the debris generated by the abutting and braking, so that the influence on the working stability of the rotor motor and the influence on the braking effect are effectively reduced.

The invention provides a brake device and a fishing reel, which not only can achieve miniaturization and low cost, but also can supply optimal braking force in a wider speed range, and can more practically realize improvement of flight distance and prevention of recoil. Specifically, the fishing reel according to one embodiment of the present invention is provided with: a spool on which a fishing line can be wound; a reel body that rotatably supports the spool; a winding unit capable of operating the spool in a winding direction; a switching unit capable of switching whether or not the reel can be unwound; the electromagnetic braking part is used for carrying out electromagnetic braking on the winding drum; a friction brake unit for imparting a frictional force to the spool; and an adjustment member that adjusts a braking force on the spool, the adjustment member being configured so as to be able to adjust both the electromagnetic brake unit and the friction brake unit.

The utility model relates to the field of electromagnetic brakes, and particularly discloses an external totally-enclosed easily-installed electromagnetic brake, which comprises a stator, a movable plate, a rotor and a flange which are sequentially arranged in the axial direction, and also comprises a cover cap, the cover cap is detachably sleeved outside the stator, so that the movable plate, the rotor and the flange are installed in the cover cap; an inner hole of the rotor is connected with a mounting shaft, one end of the mounting shaft extends out of an inner hole of the stator, and the other end of the mounting shaft is rotationally connected with the flange. The sealing performance can be improved, and the braking performance of the electromagnetic brake is guaranteed.

To prevent displacement of a gate in an electrically operated flip-up gate that can be manually opened and closed.SOLUTION: A control unit 2 of a flip-up gate 1 has a rotation detection sensor 22 that outputs a rotation pulse signal each time an electric motor 20 rotates a predetermined angle, and a control microcomputer 26 that receives the rotation pulse signal being output from the rotation detection sensor 22 according to a predetermined reception cycle Ti, monitors a rotation angle of an arm 11 in real time based on the received rotation pulse signal, and controls the electric motor 20 and an electromagnetic brake 23 so that a gate 12 is located at a desired position. When an output cycle To of the rotation pulse signal output from the rotation detection sensor 22 becomes equal to or shorter than a predetermined reference cycle Ts determined according to the reception cycle Ti, the control microcomputer 26 activates the electromagnetic brake 23 to decelerate the rotation of the electric motor 20.SELECTED DRAWING: Figure 2

The application provides a dual-stage braking electromagnetic brake and a motor device, the dual-stage braking electromagnetic brake comprising a brake stator, a first armature, a second armature, a friction plate, a first elastic structure, a second elastic structure and a magnetic structure; the first elastic structure can provide an elastic force to the first armature, the second elastic structure can provide an elastic force to the second armature, and the magnetic structure generates a magnetic force between the brake stator; after the brake stator is powered off, the second armature can be driven by the second elastic structure to be attached to the friction plate, forming a first-stage braking, and a gap is generated between the second armature and the brake stator; when the gap is greater than or equal to a preset distance, the magnetic force generated by the magnetic structure is smaller than the elastic force of the first elastic structure, forming a second-stage braking. According to the application, the problem that the clearance gradually increases and the braking torque decays due to the wear of parts during the normal operation of a traditional brake can be solved.

This utility model discloses a sealed and locked photoelectric platform with anti-interference and modular disassembly, comprising a horizontal assembly, an elevation and descent assembly, and a cabin assembly. The horizontal assembly includes a horizontal axis system component, a horizontal control component, and an inertial measurement component. The cabin assembly includes a sensor component, a main shell, a front shell, and a rear shell. The elevation and descent assembly is installed on the horizontal assembly via a stop fit, and the cabin assembly is installed on the elevation and descent assembly via stop fits at both ends of the main shell, thus forming the photoelectric platform. The cabin assembly adopts a detachable sealed structure to improve airtightness and maintainability, and the horizontal assembly is equipped with an electromagnetic brake to achieve locking and unlocking functions. Each module, through shielding filtering and modular disassembly design, improves anti-interference and maintainability, meets the stable operation requirements under high humidity, electromagnetic interference, and turbulent environments, and has high economic benefits.