789 results about "Electromagnetic clutch" patented technology

The invention discloses a motor-clutch time division multiplexing driving system for a rope-driven dexterous hand. The motor-clutch time division multiplexing driving system comprises a driving box, a plurality of rope-driven mechanisms and a plurality of dexterous fingers, wherein the rope-driven mechanisms and the dexterous fingers are arranged on the driving box; the rope driving mechanism comprises a power unit, a worm and gear unit and a guide unit. The power unit uses a sun gear to drive a plurality of planetary gears, and an electromagnetic clutch outputs power to the worm and gear unit; the plurality of worm and gear units are respectively used for controlling the winding and unwinding of the plurality of driving ropes; the plurality of guide units respectively guide the plurality of driving ropes to the same rope-driven rotating joints of the plurality of dexterous fingers; different rope-driven rotating joints of the dexterous fingers are controlled by different rope-driven mechanisms, and the same rope-driven rotating joint of the multiple dexterous fingers is controlled by the same rope-driven mechanism. According to the scheme, the fast switching characteristic of the electromagnetic clutch is ingeniously utilized, and driving control over multiple degrees of freedom by a single motor is achieved.

An inductive position sensor, comprising: a movable part (1) which is a magnetic conductor; and an induction coil assembly (100) adjacent to the movable part (1), wherein the induction coil assembly (100) and the movable part (1) form a magnetic circuit, the induction coil assembly (100) has an input end for inputting a current and an output end for outputting a feedback current; the inductive position sensor is used to detect a position of the movable part (1) based on a relationship between the feedback current and the input current. The inductive position sensor of the present disclosure has flexible and compact structural design, and can be adjusted and arranged according to different applications and structural spaces, so it is applicable to a wide range of environments. An electromagnetic clutch is also proposed.

The invention relates to the technical field of direction control transmission of speed reducers for new energy vehicles, in particular to a reversing control internal meshing RV speed reducer which comprises a transmission assembly, the transmission assembly comprises a first transmission gear and a second transmission gear, and an electromagnetic clutch is fixedly installed on the inner wall of the first transmission gear. When the rotating main shaft is driven to rotate forwards and backwards, the arranged first transmission gear and the arranged second transmission gear are meshed with the first driven gear and the second driven gear correspondingly for rotation, and in the forward rotation process, the first transmission gear and the first driven gear are in meshed transmission; in the reverse rotation process, the second transmission gear, the small gear and the second driven gear are kept in a meshed and non-transmission state, in the reverse rotation process, the second transmission gear, the small gear and the second driven gear are in meshed transmission, and the first transmission gear and the first driven gear are kept in a meshed and non-transmission state. In this way, abrasion caused by the fact that tooth grooves are not aligned when the gears are meshed can be effectively avoided.

The invention relates to an adjustable electric intracavity cutting stitching instrument, and relates to the technical field of stitching instruments. The device comprises a handle, a rotating head, a suturing rod and a suturing head, the suturing rod is connected with the handle, the suturing rod is sleeved with an outer pipe, the handle is used for driving the outer pipe to move in the length direction of the suturing rod, and the rotating head is rotationally connected to the handle, fixed to the outer pipe and used for driving the outer pipe to drive the suturing rod to rotate. The sewing head is rotatably connected to the end, away from the handle, of the sewing rod through a rotating assembly, a driving assembly is arranged on the sewing rod, connected with the rotating assembly and used for driving the rotating assembly to rotate, a handle and a rotating motor are arranged on the rotating head, the rotating motor is connected with the driving assembly through an electromagnetic clutch, and the handle is rotatably connected to the rotating head. And the base is fixed with the driving assembly. According to the invention, manual or automatic adjustment can be carried out according to conditions so as to realize the effect of accurate control or rapid control.

The invention discloses an all-electric turning execution mechanism and a turning anti-swing control method for a front wheel of an unmanned aerial vehicle, the all-electric turning execution mechanism comprises a motor, an electromagnetic clutch, a parallel gear box and an output gear, the electromagnetic clutch comprises a stator, a rotor and an armature, the stator is fixedly connected with a shell of the motor, and the rotor is connected with an output shaft of the motor; the armature is connected with a high-speed shaft of the parallel gearbox, and the output gear is fixedly connected with a low-speed shaft of the parallel gearbox. The motor, the electromagnetic clutch, the parallel gear box and the output gear are designed in an integrated mode, double optimization of the structure and functions is achieved, the number of parts and the connecting complexity are greatly reduced, and the requirements of the unmanned aerial vehicle for light weight and compact layout are met; by means of the connection and disconnection characteristics of the electromagnetic clutch, accurate active anti-swing and front wheel turning control can be achieved through linkage of the motor and the parallel gear box during power-on, and passive anti-swing can be achieved through a mechanical structure during power-off.

The utility model discloses an electromagnetic clutch, a transmission device and a vehicle, and the electromagnetic clutch comprises a transmission shaft which comprises a shaft body and a plurality of first splines arranged on the peripheral surface of the shaft body; the gear switching piece comprises a sliding sleeve and a plurality of second splines arranged on the inner circumferential surface of the sliding sleeve, the transmission shaft penetrates through the sliding sleeve, and the second splines are in sliding fit with the first splines in the axial direction; the excitation mechanism is used for driving the gear switching piece to move in the axial direction of the transmission shaft so as to be switched among different gears; the reset mechanism comprises two sets of reset assemblies arranged on the two opposite sides, in the axial direction of the transmission shaft, of the second spline, and the reset assemblies are used for driving the second spline to move in the direction of the other set of reset assemblies. According to the electromagnetic clutch, the overall structure is simple and compact.

The invention relates to the field of co-extrusion production control, and particularly discloses an efficient film bag feeding control system, which is applied to a multi-raw-material synchronous conveying device of a co-extrusion process, and comprises a full-link data acquisition module, a full-link data processing module and a full-link data processing module, the raw material characteristic parameters comprise a melting point T, a stacking density rho and a magnetic sensitive particle loading amount M; the instantaneous load pressure P of each raw material conveying channel, the temperature Tm of a co-extrusion die head melting area, the real-time thickness H of a co-extrusion film layer, stock bin liquid level data and motor rotating speed data are collected and integrated to obtain a full-link original data set; the single-drive linkage conveying mechanism comprises a main servo motor, a plurality of sets of electromagnetic clutches and a plurality of sets of spiral conveying assemblies, and the main servo motor drives a transmission shaft through a synchronous belt. According to the technical scheme, for the co-extrusion process, the multi-raw-material synchronous conveying precision can be matched, and the problems that parameter adjustment lags behind, adaptability is poor and a downstream process feedback closed loop is lacked are solved.

The invention discloses a driving and braking integrated electric wheel system with a multi-connecting-rod type braking function. A wheel unit, a planetary gear reducer, a multi-connecting-rod type braking system, a hub motor, a wheel support and an electromagnetic clutch are integrated. According to the system, the working state of a hub motor is controlled to be matched with an electromagnetic clutch to conduct multi-mode switching, the five working modes of driving, pure electric braking, composite braking, reversing braking and parking braking can be achieved, a gear ring structure is machined on the inner edge of a rim of a wheel unit, the utilization rate of the space in a wheel is increased, and the service life of the wheel unit is prolonged. Meanwhile, the hub motor serves as a multiplex power source for driving and braking work and is matched with a multi-connecting-rod transmission scheme adopted by the braking system, the driving and braking integrated function can be achieved, the energy utilization rate of the whole vehicle is improved, a conventional braking execution motor and a speed reducer thereof are omitted, sprung mass is greatly reduced, and the cost is reduced. The control performance and the driving smoothness of the whole vehicle can be improved, and great significance is achieved for high-integration and modularization research of the distributed driving technology.

The utility model discloses an automatic window opening machine, and relates to the field of window opening equipment. The automatic window opening machine comprises a box body, a driving assembly, a speed reduction chain assembly, a transmission chain assembly, an electromagnetic clutch component and a fluid damping component, the speed reduction chain assembly is jointly driven by the first driving part and the second driving part, so that the power and the cruising ability of the window opening machine are improved; during window opening work, the electromagnetic clutch component is switched to be in the state that the input end of the transmission chain assembly and the speed reduction end of the speed reduction chain assembly are connected and combined so as to implement window opening work. The acting force of transmission of the transmission chain assembly is damped by the fluid damping part, so that the force transmission effect of the transmission chain assembly is relieved, and the risk that the speed reduction chain assembly and the transmission chain assembly are damaged is reduced. According to the automatic window opening machine, buffering damping is provided for power attenuation or power reverse change through the fluid damping component, damage to a transmission structure can be reduced, the service life of the window opening machine can be prolonged, and operation stability of the window opening machine can be improved.

The invention discloses a double-clutch hydraulic reversing system and a control method, and belongs to the technical field of paddy field power mechanical gearboxes. Comprising a double-clutch hydraulic reverser, a reversing valve, an oil supplementing pump and a belt pulley, the oil supplementing pump, the reversing valve and the double-clutch hydraulic reverser form oil way circulation, and the oil supplementing pump sucks hydraulic oil stored in the double-clutch hydraulic reverser and supplies oil to the double-clutch hydraulic reverser through the reversing valve; the belt pulley is connected with an input shaft of the double-clutch hydraulic commutator; the double-clutch hydraulic reverser comprises a double-clutch area A and a double-clutch area B. The reversing valve supplies oil to corresponding oil inlets of the double-clutch hydraulic reverser through reversing signals so as to control combination of the double-clutch area A or the double-clutch area B of the double-clutch hydraulic reverser and drive an output shaft of the double-clutch hydraulic reverser to rotate forwards or backwards. The whole structure is simple, double-clutch reversing is convenient, the transmission efficiency reaches up to 92%-93%, and the working efficiency is remarkably improved; lubricating and heat dissipation are carried out through oil liquid, and durability is far higher than that of an electromagnetic clutch.

The invention provides an electromagnetic clutch, an electromagnetic clutch assembly, a power device and a vehicle, the electromagnetic clutch comprises a connecting piece, a sliding sleeve and an excitation piece, the sliding sleeve is in sliding connection with the connecting piece, and the excitation piece is arranged on the outer side of the sliding sleeve; the excitation part can generate electromagnetic induction with the sliding sleeve and drive the sliding sleeve to move, so that the sliding sleeve can be connected with the first transmission part or the second transmission part, then different gears are formed, the structure is simple, and then the vehicle can output a larger vehicle speed range.

The utility model discloses a double-drive switching shutter awning which comprises a frame body, a shutter assembly, a driving mechanism and a driving mechanism, wherein the shutter assembly is installed on the frame body; the electric driving module comprises a first electromagnetic clutch which is connected to one rotating shaft of the shutter assembly and is used for driving the shutter assembly to rotate; the manual driving module comprises a second electromagnetic clutch which is connected to one rotating shaft of the shutter assembly and is used for driving the shutter assembly to rotate; the change-over switch is connected with the first electromagnetic clutch and the second electromagnetic clutch through the switching circuit and controls the first electromagnetic clutch and the second electromagnetic clutch to be powered on or powered off, when the first electromagnetic clutch is powered on, the second electromagnetic clutch is powered off, and when the second electromagnetic clutch is powered on, the first electromagnetic clutch is powered off. When the shutter assembly is driven by the electric driving module or the manual driving module to rotate, the electromagnetic coil bearing seats of the first electromagnetic clutch and the second electromagnetic clutch can synchronously rotate, do not interfere with each other and complement each other.

Systems and methods described herein provide a smart vacuum priming system for centrifugal pumps. The vacuum priming system includes a vacuum pump, a suction assembly, an electromagnetic clutch assembly, and a pressure sensor. The suction assembly provides fluid communication between the vacuum pump and a float box of the centrifugal pump. The electromagnetic clutch assembly selectively engages the vacuum pump, such that a drive shaft of the centrifugal pump also powers the vacuum pump when the clutch is on. The pressure sensor indicates when the centrifugal pump is in a primed state based on a discharge pressure of the centrifugal pump. When the pressure sensor indicates the main pump is in the primed state, the electromagnetic clutch decouples the vacuum pump from the drive shaft. When the pressure sensor indicates the main pump is not in the primed state, the electromagnetic clutch couples the vacuum pump to the drive shaft.

The invention discloses an electromagnetic clutch type hydraulic retarder, and particularly relates to the technical field of hydraulic retarders, the electromagnetic clutch type hydraulic retarder comprises a retarder body and a control module, the control module is connected with an electromagnetic clutch, an electromagnetic air proportional valve, a water temperature sensor, an oil temperature sensor and a pressure sensor through wire harnesses, the water temperature sensor is installed on a cooling water outlet pipeline of the heat exchanger, the pressure sensor and the electromagnetic air proportional valve are installed above the oil supplementing tank, the electromagnetic clutch is located between the driving gear and the transmission shaft, the driving gear and the transmission shaft are coaxially connected with the electromagnetic clutch, the transmission shaft is fixedly connected with the rotor, and the stator is fixed to the shell. Combination or separation of the driving gear and the rotor is achieved through the electromagnetic clutch, a floating ball valve, a forced lubrication structure and a stator and rotor disengagement structure are omitted, and the electromagnetic clutch has the advantages of being low in no-load power loss, fast in response, free of the oil injection phenomenon, simple in structure, low in failure rate, low in cost and weight and the like.

The invention provides a control method and device of an electromagnetic clutch, electronic equipment and a readable storage medium, the method is applied to a series-parallel hybrid power system, when the electromagnetic clutch is in a parallel mode, if a clutch separation instruction request is received, the output torque of a generator is adjusted based on the output torque of an engine, and the output torque of the generator is adjusted. The torque of the input shaft of the electromagnetic clutch is eliminated; if the input shaft torque is smaller than the input shaft torque threshold value, it is determined that twist clearing is completed, and an electromagnetic coil of the electromagnetic clutch is controlled to be powered off; after the electromagnetic coil is powered off, if the driven end and the driving end of the electromagnetic clutch are still not separated, the parameter range of the shaking torque is determined based on the rotating speed change rate of the driven end of the electromagnetic clutch; and based on the parameter range, generating a target jitter torque to adjust the output torque of the generator until the driven end and the driving end of the electromagnetic clutch are separated. Therefore, the direction, the upper limit value and the lower limit value of the shaking torque are determined through the rotating speed change rate of the driven end, and the electromagnetic clutch can be stably separated.

The invention relates to a control method, device and equipment of an electromagnetic clutch and a medium, the two ends of the clutch are used for being connected with an engine and a driving motor respectively, when the clutch is engaged, a corresponding vehicle is in a common driving state of the engine and the driving motor, and when the clutch is disengaged, the corresponding vehicle is in an independent driving state of the driving motor. The control method comprises the steps that whether the vehicle speed meets the clutch connection or disconnection condition or not is judged; if yes, the engine is adjusted to the optimal oil consumption working condition, and the optimal oil consumption working condition corresponds to the area on the universal characteristic curve of the engine; the clutch is engaged or disengaged. According to the scheme, the engine is firstly adjusted to the optimal economic oil consumption working condition, then the clutch is engaged or disengaged, the problems that in the prior art, clutch engagement or disengagement consumes long time and is low in efficiency are solved, and oil consumption is effectively reduced.

The invention provides an electromagnetic clutch combination control method, a power system and a medium. The electromagnetic clutch combination control method comprises the steps that the real-time current of an electromagnetic clutch, the accelerator opening degree change rate and the vehicle speed are obtained; under the condition that the vehicle meets the pre-combination condition of the electromagnetic clutch, a first target value is determined according to the number of combination failures of the electromagnetic clutch, and current with the magnitude being the first target value is applied to an electromagnetic valve of the electromagnetic clutch so as to drive the electromagnetic clutch to be combined; under the condition that the real-time current of the electromagnetic clutch is larger than or equal to the first target value, preloading torque is determined based on the accelerator opening degree change rate and the vehicle speed; and controlling the output torque of the engine according to the preloading torque. The pre-combination time is shortened while successful combination of the electromagnetic clutch is guaranteed, and the dynamic property of the whole vehicle is improved.

The invention is suitable for the technical field of wind power generation equipment, and provides a distributed power generation vertical shaft fan which comprises a fan support, a main transmission shaft, a fan main shaft base, a wind power detection device and at least one distributed power generation unit. The fan impeller is divided into a spiral impeller structure and a lift-drag composite impeller structure, the distributed power generation unit comprises a power generation device base and a main driving outer gear, the power generation device base is rotationally provided with a plurality of power generation driving gears, and the power generation driving gears are meshed with the main driving outer gear; the power generation driving gear is in driving connection with the distributed generators through the power generation driving shaft, the main transmission shaft drives the main driving outer gear to drive the distributed generators to generate power, the electromagnetic clutch is arranged between the power generation driving shaft and the distributed generators, and the number of the distributed generators connected to the load can be flexibly adjusted according to working conditions. And maximum utilization of energy is realized.

A passenger car multi-system integration system includes at least an air compressor and a liquid tank. The air compressor and the liquid tank have exterior walls that at least partially contact. During operation of the air compressor, heat as a byproduct is transferred from the air compressor to the liquid tank by conduction, and is then transferred to the contents of the liquid tank by convection. The passenger car multi-system may also include at least one electromagnetic clutch in communication with the motor and the air compressor or the motor and a water pump, such that power can be optionally directed to the air compressor or the water pump during operation of the motor.

The present invention discloses an FES cycling control method, system, electronic device, and computer program product, relating to the technical field of rehabilitation training methods. The FES cycling control method combines a flywheel, an electromagnetic clutch, and a bicycle crank to provide an FES cycling control method for the quadriceps femoris of patients with spinal cord injury. This method addresses technical difficulties in FES-based fixed cycling rehabilitation exercises, such as the limited torque of electrically stimulated muscles, the difficulty of precise control of muscles as nonlinear elements, and the tendency for long-term continuous electrical stimulation to induce muscle fatigue. The practical effects of FES-based fixed cycling rehabilitation exercises still need to be improved. Compared with traditional electrical stimulation treatment methods, the present invention effectively reduces the intensity of electrical stimulation, improves energy utilization, and achieves energy-saving effects while ensuring rehabilitation needs.

The crystal ingot carrier with the lifting function comprises a bottom plate and a top plate arranged over the bottom plate, the top plate and the bottom plate are fixed through a plurality of guide columns, moving wheels and an electromagnetic clutch assembly are installed at the bottom of the bottom plate, a manual assembly is installed on the top plate, and a lead screw pair assembly is installed between the top plate and the bottom plate. A sliding block is connected to the lead screw pair assembly in a sliding mode, the sliding block is connected with the guide columns through linear bearings, the top end of the lead screw pair assembly penetrates through the top plate and then is in transmission connection with the manual assembly, the bottom end of the lead screw pair assembly penetrates through the bottom plate and then is connected with the electromagnetic clutch assembly, and a motorized assembly is installed at the bottom of the sliding block and connected with the lead screw pair assembly. The motorized assembly, the manual assembly and the electromagnetic clutch assembly are jointly and electrically connected with a controller. The sliding block is fixedly connected with a plurality of crystal ingot seats, through holes are formed in the positions, corresponding to the crystal ingot seats, of the top plate, descending and carrying of single crystal ingots are integrated, and the single crystal ingot descending and carrying device has the advantages of simplifying operation and reducing cost.

The invention relates to the field of cranes, and provides a self-lubricating-based intelligent electric chain crane and control system.The self-lubricating-based intelligent electric chain crane comprises a machine body, a driving assembly and a chain wheel assembly which are connected, a chain is connected to the chain wheel assembly, a first bevel gear is fixedly connected to the chain wheel assembly, and a driving rod is rotationally connected to the inner wall of a machine cavity; an oil guide box, an oil storage box and a processing cylinder are fixedly connected to the inner wall of the machine cavity, the driven rod is rotationally connected to the oil guide box, a first one-way valve and a second one-way valve are connected to the inner wall of the oil guide box, and the oil storage box is fixedly connected with the oil guide box. The inner wall of the machine cavity is rotatably connected with a swing part through an automatic reset rotating shaft, the swing part is in rolling connection with a ball, the top wall of the treatment cylinder is slidably connected with two oil guide blocks, the oil guide blocks are connected with the inner wall of the machine cavity through elastic parts, and inclined plane parts are fixedly connected to the oil guide blocks. According to the chain self-lubricating device, the automatic avoiding function between the chain and a component is achieved, and meanwhile the chain self-lubricating function is achieved.

The invention relates to the technical field of ball nut machining equipment, and discloses a ball nut thread milling device which comprises a machine tool, a mechanical arm is arranged on the outer wall of the machine tool, a fixing frame is arranged on the outer wall of the mechanical arm, a fixing pipe is fixedly connected to the interior of the fixing frame, and a cutter head is fixedly connected to the outer wall of the fixing pipe. A motor is fixedly connected to the upper surface of the fixing frame, a transmission mechanism is arranged at the output end of the motor, a sleeve is connected to the transmission mechanism, the inner wall of the sleeve is rotationally connected to the outer wall of the fixing pipe, and the outer wall of the sleeve is rotationally connected to the interior of the fixing frame. Power output by the motor is transmitted to the sleeve through the transmission mechanism, the sleeve drives the second driving gear to rotate, the driven shaft is controlled by the electromagnetic clutch to be connected with the milling cutter or the grinding wheel, a machining cutter can be rapidly replaced, the working efficiency of ball nut thread milling and grinding is remarkably improved, and the time cost of manual intervention and cutter replacement is reduced.

The invention belongs to the field of medical equipment, and provides an ultrasonic-guided automatic blood vessel puncture integrated device which comprises a wireless ultrasonic instrument, a button A and a button B are arranged on one side of the outer surface of the wireless ultrasonic instrument side by side up and down, a bearing support is fixedly installed at the bottom of one side of the wireless ultrasonic instrument, and a movable support is rotatably installed in the bearing support. A fixing groove is formed in the lower bottom face of the movable support, a driving mechanism is arranged in the fixing groove and comprises a micro hydraulic booster, the micro hydraulic booster is arranged in the fixing groove, and an electromagnetic clutch is installed at the output end of one side of the micro hydraulic booster; by means of the collaborative design of the driving mechanism, the puncture mechanism and button control, medical workers do not need to conduct collaborative operation with the two hands, the actions such as puncture needle core propelling and cannula deepening can be achieved by pressing the corresponding buttons, the operation process is simplified, and in the scene of war wound first aid and the like, a vascular access can be rapidly established, time is saved, and the treatment efficiency is improved.

The invention relates to the technical field of vehicles, and provides a vehicle power system which comprises a motor used for providing power for the system; the input shaft is used as the power input shaft of the motor; an outer ring of the one-way clutch is connected with a first transmission mechanism, and the first transmission mechanism is driven by the input shaft to move; an inner ring of the first transmission shaft is connected with a second transmission mechanism which is used for driving a tire to rotate; a driving friction wheel of the electromagnetic clutch is fixedly connected to the input shaft, and a driven friction wheel of the electromagnetic clutch is connected with the second transmission mechanism through a third transmission mechanism; according to the system, forward driving, backward driving, smooth upshift and downshift and reverse dragging working condition energy feedback of the vehicle can be achieved, meanwhile, the limp function is provided when the one-way clutch breaks down, the power transmission efficiency and the gear shifting smoothness are both considered, and the core requirements of new energy and hybrid vehicles for a power system are met.

The invention discloses an automobile thermal forming stamping die anti-sticking coating protection assembly, and relates to the technical field of automobile part production, the automobile thermal forming stamping die anti-sticking coating protection assembly comprises a die body, the die body is provided with an auxiliary mechanism used for protecting an anti-sticking coating, and the auxiliary mechanism comprises two electric push rods, two cylindrical holes, a storage tank and two sliding grooves. A first electric valve is installed at the output end of the storage tank, a double-shaft motor is arranged on the periphery of the storage tank, and a first pump head and a second pump head are installed at the two output ends of the double-shaft motor through a main electromagnetic clutch and an auxiliary electromagnetic clutch respectively. When the mold release agent is used, scratch and abrasion of impurities to the anti-mold-sticking coating are reduced through impurity cleaning, a film formed by spraying the mold release agent on the surface of the anti-mold-sticking coating not only can play a role in mold release and lubrication, but also can play a role in buffering the anti-mold-sticking coating, so that the service life of the anti-mold-sticking coating is prolonged, and frequent shutdown is avoided.

The utility model discloses a SiC single crystal growth furnace induction coil lifting adjusting system which comprises a low-speed transmission mechanism and a quick transmission mechanism, the low-speed transmission mechanism and the quick transmission mechanism are horizontally arranged on a mounting plate in parallel, and the low-speed transmission mechanism comprises a first motor, a planetary reducer, a harmonic reducer and a first electromagnetic clutch; the quick transmission mechanism comprises a second motor and a second electromagnetic clutch; the straight line where the output ends of the first electromagnetic clutch and the second electromagnetic clutch are located is perpendicular to the straight line where the rapid transmission mechanism is located, the output ends of the first electromagnetic clutch and the second electromagnetic clutch are both provided with synchronous belt wheels, the two synchronous belt wheels are provided with synchronous belts, and one synchronous belt wheel is connected with a right-angle speed reducer. The output end of the right-angle speed reducer is connected with the induction coil lifting mechanism so as to drive the induction coil to ascend and descend. According to the lifting device, the induction coil can be lifted at an extremely low lifting speed, the stability is good in the lifting process of the induction coil, and the growth quality of silicon carbide crystals is improved.

The invention discloses a device for measuring the scouring depth of a pier in a flood season, and relates to the technical field of riverbed scouring depth measurement, and the device comprises a seat body which is rotatably installed on a stand column, a first fixed pulley is installed on a support of the seat body, and the support is provided with a pulse counter used for detecting the number of turns of the first fixed pulley; the telescopic frame is arranged on the seat body, and a second fixed pulley is mounted at the telescopic end of the telescopic frame; the motor is fixed on the seat body; the torque sensor is fixed on the seat body, and an input shaft of the torque sensor is connected with the motor through a first coupler; an input shaft of the electromagnetic clutch is connected with an output shaft of the torque sensor through a second coupler; the winding wheel disc is installed on the seat body, a wheel shaft of the winding wheel disc is fixedly connected with an output shaft of the electromagnetic clutch, a measuring rope on the winding wheel disc is wound around the first fixed pulley and the second fixed pulley, and the tail end of the measuring rope is connected with a measuring hammer; and a control box. The device can effectively measure the local scouring depth around the pier.

The invention discloses an unmanned aerial vehicle centering and locking platform and a control method, and belongs to the technical field of low-altitude economy and intelligent carriers. The platform comprises a platform body, a centering mechanism and a locking mechanism. The centering mechanism comprises an X-direction horizontal lead screw transmission unit and a Y-direction horizontal lead screw transmission unit, and the locking mechanism comprises a vertical lead screw transmission unit and a connecting rod pressing mechanism. The core is that a single direct current motor is adopted to drive a one-inlet five-outlet speed reducer, and power is selectively distributed to the transmission units in the three directions through five normally-open jaw electromagnetic clutches. According to the self-locking device, centering and locking are achieved through transmission of the trapezoidal lead screw, and the self-locking device has the advantages of being good in self-locking performance and high in rigidity; through cooperative control of a single motor and multiple clutches, X-direction centering, Y-direction centering and final locking of the unmanned aerial vehicle on the platform can be completed in sequence only through one driving link, the mechanical structure is simplified, the cost and weight are reduced, and the reliability and impact resistance of the system are improved.

The invention relates to the technical field of memory bank testing, in particular to a memory bank aging testing device and method.The memory bank aging testing device comprises a testing box, a testing cavity is formed in the testing box, a testing plate is arranged in the testing cavity, and a memory bank is inserted into the testing plate. A double-shaft motor is matched with an electromagnetic clutch to respectively drive a soaking mechanism and a heat recovery mechanism, a reciprocating screw rod drives an extension box to move up and down in a reciprocating manner, a toothed plate and a driving gear are in meshing transmission, so that a rotating pipe rotates while moving, and a spray pipe forms composite sweeping airflow; dehumidification and regeneration are synchronized through cooperation with continuous rotation of the rotary box, closed-loop air treatment is formed, dynamic and uniform distribution of hot air in the test cavity is achieved, temperature stratification is effectively eliminated, meanwhile, energy consumption is remarkably reduced through waste heat recovery and medium regeneration, and the test efficiency is improved. And high uniformity, high cleanliness and low-energy-consumption operation of a high-temperature aging test environment are guaranteed.