275 results about "Magnetic particle clutch" patented technology

A system and method for controlling a plurality of accessories associated with a multiple cylinder internal combustion engine having the accessories coupled to an engine crankshaft by an electromagnetic coupling device with a flowable magnetic material disposed between a driving member and a driven member include selectively supplying power to the electromagnetic coupling device in response to at least one operating condition to simultaneously engage or disengage the plurality of engine accessories. Embodiments include a magnetic particle clutch or magnetorheological fluid clutch connected to an engine crankshaft and a plurality of engine accessories that may include an air conditioning compressor, water pump, power steering pump, alternator, and / or supercharger, for example.

The invention relates to a servo reducer performance parameter testing device, which belongs to the technical field of mechatronics and relates to gear transmission measurement technology. The device comprises a mechanical part and a control part. The mechanical part comprises an alternating current servo motor, a servo reducer, a magnetic powder clutch, an angular displacement amplifier, a tested servo reducer loading station, a moment sensor and a magnetic powder brake, wherein all parts are connected by couplers. The control part comprises a magnetic powder brake controller, a moment sensor regulation circuit, a data acquisition card, an angular displacement sensor, a magnetic powder clutch controller, an industrial control computer and a motion control card. The device can test multiple performance parameters (such as moment rigidity, empty accuracy, transmission accuracy and breaking moment) of the servo reducer and is applicable to tested servo reducers of different specifications and models. The entire device has a simple structure and is convenient to use, easy to operate and high in test accuracy and efficiency.

The invention relates to a constant tension constant speed winding control method and a system. A device for implementing the method comprises a winding shaft, and the winding shaft comprises an unwinding shaft and a retracting winding shaft. Unwinding shaft speed N1, retracting winding shaft speed N2, winding coil speed V and winding tension f are measured, rotating speed of the unwinding shaft is controlled according to the unwinding shaft speed N1, winding coil speed V1 and unwinding shaft rolling diameter D1 so as to maintain the constant speed, and torque of the retracting winding shaft is controlled according to the retracting winding shaft speed N2, the winding coil speed V1 and retracting winding shaft rolling diameter D2 so as to maintain the constant tension. Compared with traditional speed tension control, the constant tension constant speed winding control method and the system have the advantages that a tension controller, a tension sensor and a magnetic power clutch are omitted, the structure is simple, the control is convenient, the component cost, the labor cost and later maintenance cost are reduced, the operation is reliable, and the performance is stable.

A comprehensive test platform for an industrial robot joint reducer includes a bed body, a linear guide rail is laid on the right half part of the bed body, a magnetic powder brake connected with a left side end of the bed body is connected with a first torque sensor through a coupling, the first torque sensor is connected with a first angle encoder through a coupling, the first angle encoder is connected through an end-toothed disc with an output disc of a tested joint reducer installed in a special jig, the special jig is fixed on a movable platform, and the movable platform is mounted on the linear guide rail through sliding blocks; and a second angle encoder is mounted on an input shaft of the tested joint reducer, the input shaft of the tested joint reducer is connected with a second torque sensor through a coupling, the second torque sensor is connected with an output of a magnetic powder clutch through a coupling, and the magnetic powder clutch is fixed on the movable platform, and is connected with a spindle motor fixed on the movable platform through a coupling. The comprehensive test platform for the industrial robot joint reducer can realize testing of multiple parameters, and substantially improves testing efficiency.

The invention relates to an analog loading system for a servo system. An output shaft of the servo system is mechanically connected with a retarder, an inertia plate and a loading motor in turn via a connecting shaft; wherein the loading motor is connected with a motor driver which is connected with an inverter electric signal, a moment controller is connected with the motor driver and a rotation moment and rotation speed sensor and connected with a command computer, and the rotation moment and rotation speed sensor is arranged on the connecting shaft between the servo system and the loading motor. The invention can simulate any-sized inertial loading and dynamic / static loading with any characteristics. The invention adopts an electrically loading manner under moment, so as to overcome the shortcomings such as difficult turnaround of direct current generator loading and low reliability of magnetic powder clutch loading, and the servo device loading presents no redundant moment. The invention can simulate loading with the advantages of wide moment range, high precision, high repeat frequency and high response speed.

The invention discloses a constant-tension adhesive tape rewinder allowing the tape roll discharging position to be controlled. An unwinding inflatable shaft around which adhesive tape is wound and a winding inflatable shaft are arranged on a machine frame, and a roll conveying shaft is arranged between the unwinding inflatable shaft and the winding inflatable shaft. A dual-closed-loop roll discharging position control system comprising an upper infrared photoelectric sensor, a lower infrared photoelectric sensor, a PLC, a stepping motor, and the like is arranged at the roll discharging position. The adhesive tape enters a flattening wheel. A winding length control system comprising an encoder, a meter counter, an electromagnetic relay, an adjustable-speed motor and a frequency converter is arranged at the position of a roll conveying shaft. A semi-closed-loop tension control system comprising an infrared rotary sensor, a taper tension controller, a magnetic powder clutch and the like is arranged at the roll receiving end, and a manual deviation rectifying device used for laser calibration and positioning and a pressing assembly are also arranged. By the adoption of the constant-tension adhesive tape rewinder allowing the tape roll discharging position to be controlled, excessive stress and serious deformation, caused by major tension fluctuation, of the adhesive tap are completely avoided, the initial precision and the operating precision of the adhesive tape are high, and the quality of adhesive tape products is greatly improved. Meanwhile, the length of an adhesive tape roll can be controlled, winding efficiency, unwinding efficiency, replacing efficiency and installation efficiency are high, and using and operation are convenient and fast. The adhesive tape rewinder can be used for producing a big polytetrafluoroethylene adhesive tape roll in the required size.

The invention discloses a full-automatic laminating machine which comprises an emptying mechanism, a laminating mechanism, a material collecting mechanism and a programmable logic controller (PLC), wherein the emptying mechanism is provided with a storage rack which is provided with a locating seat; the storage rack is formed by connecting two side plates by a connecting rod; the storage rack is arranged on a base in a sliding way; the base is provided with a first driving mechanism connected with the storage rack in a transmission way; a pressure sensor and a distance sensor are arranged between the emptying mechanism and the laminating mechanism; the pressure sensor is provided with a pressure transmission roller; paper passes through the distance pressure and comes round the pressure transmission roller from the upper part; a magnetic powder clutch connected with an inflatable shaft is arranged at one side of a mounting seat by a mounting plate; the locating seat comprises a fixed seat and a movable seat; the inflatable shaft is tightly held by the movable seat and the fixed seat which are in a sliding fit way. The full-automatic laminating machine is capable of automatically adjusting the tensity of the paper so as to enable the tension of the paper to be constant, is capable of automatically correcting the deviation of the paper, can be used for loading and unloading roll paper, and is more convenient and faster.

An electric drive axle, which is located between and powers the left and right drive wheels of an automotive vehicle, includes an electric motor and left and right torque couplings. Torque developed by the motor transfers through the torque couplings to axle shafts which are connected to the drive wheels. Each torque coupling includes a magnetic particle clutch and a planetary set organized such that the current flowing through the electromagnet of the clutch controls the torque delivered through the coupler. The magnetic particle clutches also accommodate slippage so that the drive wheels may rotate at different angular velocities.

The invention discloses a test bed and method for testing damping of a silicone oil clutch of an engine cooling fan. The test bed comprises a torsion vibration excitation system, a silicone oil clutch driving system, a data acquisition system and a processing control system, wherein the torsion vibration excitation system comprises a vibration excitation motor and a planet gear vibration excitation box, and is used for generating continuous simple-harmonic torque excitation with the adjustable frequency for the test bed, the silicone oil clutch driving system comprises a spindle motor, a magnetic powder clutch, a synchronous pulley and a torsional vibration shaft, and can be used for achieving rotational motion of the silicone oil clutch, rotating speed signals, collected by the data acquisition system, of a working receiving disk are processed through the processing control system to obtain the second-order inherent frequency of the test bed, and thus the damping of the silicone oil clutch is calculated. According to the test bed and method for testing the damping of the silicone oil clutch of the engine cooling fan, the purposes that vibration excitation torque is applied in the process of rotation of the silicone oil clutch, and the actual working conditions of the silicone oil clutch are simulated are achieved; torsional vibration rotating speed signals are acquired by using an angle encoder in a software timing mode, and then are processed automatically, other data acquisition devices do not need to be additionally installed, the manufacturing cost is reduced, and it is ensured that the test result is high in accuracy.

The invention discloses a precision speed reducer static performance test bench comprising main components including a servo motor, a torque rotating speed sensor, a high-precision encoder, a speed reducer under test and a magnetic powder clutch as well as fixedly connected auxiliary components including a base, a horizontal slide bench, a coupling, a reducer mounting seat, etc. The magnetic powder clutch is used to supply an input end load, the servo motor provides an output end load, and a testing device of the angle amount and the rotating speed amount is added in the middle to test the static performance of the precision speed reducer. According to the definition of each static performance parameter of the precision speed reducer, static performance testing of hysteresis, torsional stiffness and the like can be done on the same test bench, and static performance of different types of precision speed reducers can be tested; and the test bench adopts a program-controlled loading method with high degree of automation. The test bench has the advantages of simple structure, high testing precision, low requirement for testing environment and high degree of automation, and can meet the testing and measurement requirements of industrial robots for the static performance of precision speed reducers.

The invention discloses a test platform for constant load control performance of an electric winch of a helicopter. The test platform comprises a test platform frame, a helicopter electric winch, a working bedplate and a reel, wherein a tension detection pulley block and a tension sensor connected with the tension detection pulley block are arranged on the test platform frame; the test platform further comprises a tension controller; a signal input end of the tension controller is connected with a signal output end of the tension sensor; the two ends of the reel are respectively connected with two bearing bases on the working bedplate; an output shaft at one end of the reel is successively connected with a magnetic powder clutch, a coupler, a speed reducer and a servo motor; the magnetic powder clutch, the coupler, the speed reducer and the servo motor are all arranged on the working bedplate; a wire rope passes through the electric winch of the helicopter and the tension detection pulley block in turn and is connected into the reel. The test platform provided by the invention has the characteristics of constant load, high loading control precision, safe and reliable structure, easiness in detaching and maintaining and capability of meeting the test demand on the loading performance of the wire rope of the electric winch of the helicopter, and can be widely applied to the field of electric winch test.

The invention discloses an active anti-roll bar. The anti-roll bar comprises a left half anti-roll bar, a right half anti-roll bar, a left planetary gear set, a right planetary gear set, a magnetic powder clutch, a double-rotor motor and an ECU and is characterized in that the magnetic powder clutch comprises a drive end and a driven end, and the magnetic powder clutch selectively combines or separates the drive end and the driven end; the double-rotor motor comprises an inner rotor and an outer rotor, the inner rotor is connected to the drive end of the magnetic powder clutch and penetrates the magnetic powder clutch to be connected with the sun gear of the left planetary gear set, the leading-out end of the outer rotor is connected with the driven end of the magnetic powder clutch through a flange and a bolt, and the other output end of the outer rotor is connected with the sun gear of the right planetary gear set; the ECU is electrically connected with the double-rotor motor and themagnetic powder clutch. The active anti-roll bar has the advantages that suspension roll angle rigidity can be changed actively and steplessly, whole-vehicle high-speed roll stability, whole-vehiclelow-speed suspension comfortableness and a system failure protecting function are also achieved, independent travel control of a left suspension and a right suspension can be achieved, active roll canbe achieved, and vehicle body lateral collision passive safety is increased.

The invention relates to an automatic-deviation-rectification, constant-speed and constant-tension rewinding machine. A magnetic powder brake and a cantilever unwinding inflation shaft are mounted on a rack; an unwinding membrane passes through an unwinding force sensor roll and an unwinding guide roll, and is delivered into a membrane processing device to form an unwinding tension control device; a screw rod sliding table and a stepping motor are fixed on the rack; a variable frequency motor, a magnetic powder clutch and a cantilever winding inflation shaft are fixed on the surface of the screw rod sliding table; a winding membrane sequentially passes through a photoelectric position sensor, a winding force sensor roll and an encoder roll, and finally passes into the membrane processing device to form a device for controlling winding tension, winding speed, deviation rectification and the like; and an unwinding force, winding force and deviation rectification controller with a program-controlled preset value is utilized to control constant tension of the membrane, and to rectify deviation automatically. The programmable logic controller (PLC), a frequency converter and the variable frequency motor are arranged to control the transmission of the membrane at the constant speed. The machine achieves multifunctional control, solves the problems of high stress deformation, non-uniform viscosity, the deviation and the like, is high in quality and efficiency, simple, reasonable in design, and convenient to operate and maintain, and is particularly applicable to rewinding of a polytetrafluoroethylene adhesive tape coil.

The invention provides a dual-motor coupling electric power-assisted steering device and a control method thereof. Mode switch is achieved by adopting a magnetic powder clutch and a synchronizer, and a single-row planetary gear system serves as a power coupling device of a first motor and a second motor. A first clutch and a second clutch limit torque output of the first motor and the second motor correspondingly, and the energy flow direction of the second motor is changed through the synchronizer. According to electric current on-off control of an ECU over the clutches, power output of the motors is determined. By using joint conditions of a joint sleeve and combing on-off of the clutches, coupling conditions are determined. According to motor failure and a drive circuit self-diagnosis technology, the power-assisted steering module ECU judges the states of the motors. By controlling the clutches and the joint sleeve, dual-motor fault-tolerant control is achieved. According to the dual-motor coupling electric power-assisted steering device and the control method thereof, four working modes including dual-motor independent drive, dual-motor rotating-speed coupling drive, dual-motor torque coupling drive and the like can be achieved, requirements for various performance of steering in the driving process of a commercial vehicle can be met, and a system is high in reliability.

The invention discloses a rehabilitation instrument for training rotation of wrist joints, belongs to the field of rehabilitation assistant tools, and relates to a rehabilitation device for rehabilitating wrist joints of hemiplegic patients. The rotating range, allowed by the rehabilitation instrument, of a wrist joint can be adjusted, and the driving force of the rehabilitation instrument is provided by a reducing motor and passed to a palm of a patient through a coupler, a magnetic powder clutch, a stepped shaft and a hand holding board sequentially so as to drive the patient to perform rotation movement of the wrist joint. The magnetic powder clutch is taken as a damper for mechanism movement, and different assistance functions can be achieved by controlling current of the magnetic powder clutch. Forward and backward rotation ranges of round discs and the hand holding board are changed by changing the relative position of nuts and the round discs in the rehabilitation instrument so as to adjust the rotation ranges of the wrist joints; and the rehabilitation instrument further comprises a simple form and is provided with three work modes of a passive mode, an assistance mode and a damping mode. The rehabilitation instrument is simple in structure, novel in design, safe and reliable, and can estimate and record rehabilitation conditions of the patient to provide a certain treatment standard for doctors.

The invention provides an active-passive hybrid control type hydraulic four-linkage rod prosthetic knee joint. The active-passive hybrid control type hydraulic four-linkage rod prosthetic knee joint comprises a hydraulic damper, an outer casing of the damper, a shank support part, a thigh support part, a four-linkage rod mechanism and an active drive motor assembly, wherein the hydraulic damper isprovided with a cylinder body, a steel coat, a cylinder cover, a piston rod, a piston, a spring push block, an extending-assisting spring, a spring casing, an adjusting seat, an axial adjusting valvebody, a stopper and a stepping motor; the outer casing of the damper is arranged at the exterior of the hydraulic damper; the shank support part is fixedly connected with the bottom part of the outercasing of the damper; a connecting rod fixing part is fixedly arranged at the thigh support part, and is pivoted with a connecting rod, and the other end of the connecting rod is pivoted with the piston rod; the four-linkage rod mechanism is provided with an upper linkage rod, a lower linkage rod, a front linkage rod and a back linkage rod, the upper linkage rod is integrated at the lower end ofthe thigh support part, the lower linkage rod is integrated at the upper end of the outer casing of the damper, and the front linkage rod and the back linkage rod are used for connecting the thigh support par and the outer casing of the damper; the active drive motor assembly is provided with a direct current motor, a magnetic powder clutch and a gear reduction gearbox, the direct current motor isfixedly arranged at the upper end of the thigh support part, the magnetic powder clutch is connected with the direct current motor, and the gear reduction box is connected with the magnetic powder clutch.

The invention provides a rehabilitation device used for training a wrist joint to bend and stretch, belongs to the technical field of rehabilitation aids, and relates to a rehabilitation device aimed at joint rehabilitation of a hemiplegic patient. According to the rehabilitation device used for training the wrist joint to bend and stretch, a magnetic powder clutch is used as a damper of mechanism motion, and the magnitude of current of the magnetic powder clutch is controlled so as to achieve different assistance functions. The rehabilitation device is further provided with a left hand supporting plate and a right hand supporting plate, the left hand supporting plate and the right hand supporting plate are rapidly dismounted from or mounted on a main shaft, and a liquid crystal display is embedded above a machine box. The rehabilitation device can be used by patients at different rehabilitation stages for recovering wrist joint muscle force and restraining spasm, can record rehabilitation conditions of the patients, can adopt corresponding rehabilitation therapy modes aiming at different rehabilitation degrees of the patient, has a passive working mode, an assistance working mode and a resistance working mode, and can effectively train functions of main muscle groups of a forearm. The rehabilitation device is simple in structure, novel in design, and safe and reliable.

The invention discloses a three-phase asynchronous motor efficiency characteristic test system and test method. The test system is characterized in that a power tester is arranged at an input end of a motor and used for testing the input power of the motor; a torque rotating speed tester is arranged on the output shaft of the motor and used for testing the output torque and the angular velocity of the motor; a magnetic powder clutch is arranged at tail end of the output shaft of the motor and used for loading of the motor. Test of a load rate and an efficiency characteristic of a motor can be carried out rapidly and accurately.

The invention relates to a marine constant-tension winch. The marine constant-tension winch comprises a motor, a reduction gearbox, a winding drum and a fair-lead. The motor drives the winding drum through the reduction gearbox. A mooring rope is wound on the winding drum and connected with the fair-lead in a penetrating mode. The marine constant-tension winch further comprises a constant-tension control system. The constant-tension control system comprises a magnetic powder clutch, a force measuring device and a PLC. The magnetic powder clutch is installed between the output of the motor and the input of the reduction gearbox. The force measuring device is a three-roller shaft pin type force measuring device. The three-roller shaft pin type force measuring device comprises three rollers distributed in the shape of an isosceles triangle. A rotary shaft of the middle roller is a shaft pin type force measuring sensor. An encoder is installed on a rotary shaft of one of the rollers arranged on the two sides. The three-roller shaft pin type force measuring device is arranged between the winding drum and the fair-lead. The mooring rope sequentially penetrates through the three rollers and then is reversed through the fair-lead to be output. A PLC control device is in control connection with the motor, the shaft pin type force measuring sensor, the encoder and the magnetic powder clutch.

The treatment of glass fiber is made by extracting the yarn evenly, delivering to the magnetic powder clutch through the guide roller to adjust its current to the rolling shaft, coiling the yarn evenly in the same speed on the rolling shaft, keeping certain tension of the line. It has small investment, simple in structure, easy for operation, and effective in solving tension balance issue.

The invention provides an intelligent electromagnetic fitness equipment damper for replacing the conventional balance weight iron. Because a magnetic powder clutch has the characteristic that the size of the transmission torque has proportional linear relation with the magnetizing current but is not related to the slip frequency speed thereof, the size of the moving resistance is changed by a method of controlling the size of the slip frequency torque generated by the magnetizing current by controlling the magnetizing current. An accelerating mechanism consisting of a planetary gear train increases the rotating speed to reduce the allowable torque transmission value of the used magnetic powder clutch. Input and output ends of the magnetic powder clutch are respectively connected with two gears generating rotating speed difference in a differential mechanism consisting of two gear pairs with different speed ratios to acquire lower slip frequency speed to reduce the slip frequency powder. The intelligent electromagnetic fitness equipment damper changes the linear motion of the balance weight source of the conventional fitness equipment into the rotating motion, carries out real-timedetection on the fitness equipment by adopting a computer control system and carries out dynamic management on different requirements on different equipment through program setting.

The invention relates to a copper bar straightening machine of a commutator. The copper bar straightening machine comprises a straightening machine frame, a straightening machine electric cabinet and a pay-off reel frame. The straightening machine frame is mounted on the upper portion of the straightening machine electric cabinet, a straightening traction component is mounted on the straightening machine frame, the pay-off reel frame is arranged on one side of the straightening machine electric cabinet while a sensing detection support is arranged on the other side of the same, a straightening drive motor is mounted in the straightening machine electric cabinet and drives a magnetic powder clutch to be connected with the straightening traction component, a pay-off motor synchronously rotating with the straightening drive motor is arranged on one side of the pay-off reel frame, a rotating shaft is longitudinally connectively arranged in the pay-off motor and the pay-off reel frame side by side, a pay-off reel is rotatably mounted on the rotating shaft, a copper bar winds the pay-off plate, and the free end of the copper bar penetrates the straightening traction component and a copper platoon guide ring on the sensing detection support in sequence. The copper bar straightening machine is simple in structure, convenient to operate and safer to operate, and pulling apart of the copper bar is avoided at the same time.

The invention relates to a virtual instrument-based vehicle ABS (Antilock Brake System) test and control system and a test method. An ABS is a test object to be tested, and a speed of vehicle is simulated by using a rotating speed of a motor; speed governing control on the motor is realized through regulating the frequency of a genera inverter; a fly wheel is used for simulating partial motion inertias of the vehicle; and a magnetic powder clutch is used for controlling the magnitude of input current and regulating the output torque by using a computer so as to simulate different road surfaceattachment coefficients and simulate the partial motion inertias of the vehicle. The whole test process can be controlled by a program of the computer, thus the test function of all items to be tested can be changed through changing the program of the computer; hardware equipment is combined with software programming, a hardware device is simply installed, and a virtual test panel is visual and easy to use; and the advantages of high data acquisition speed and test precision, good repeatability, capability of saving a large amount of time and labor, great improvement of test efficiency and high reliability are achieved.

The invention discloses a magnetic powder clutch applying permanent magnet material. A permanent magnet and an excitation coil are embedded in a magnetic yoke for constituting a permanent magnet-electromagnetic hybrid type magnetic circuit structure; the magnetic yoke is bisected into two parts along the axial direction by the permanent magnet and the excitation coil, the permanent magnet is positioned at the radial inner side of the excitation coil, and the magnetic yoke is supported on an output shaft through a bearing; a second magnetic powder baffle ring is arranged on the end surface, which is adjacent to a driven rotor, of the magnetic yoke; the magnetic yoke is connected with a flange plate; and the flange plate is fixed on a baseframe; an inner driving rotor and an outer driving rotor are connected into a whole through a connecting ring for constituting the driving rotor of the clutch; the driven rotor is connected with the output shaft through a key; and a first magnetic powder baffle ring is arranged on the end surface, which is adjacent to the magnetic yoke, of the driven rotor; magnetic isolation rings are welded on the inner driving rotor and the driven rotor; and the inner driving rotor, the driven rotor and the outer driving rotor are arranged on the same axial line. The magnetic powder clutch disclosed by the invention has the advantages that structure is simple, control is convenient, moment of inertia of driving parts is moderate, and energy conservation, emission reduction and consumption reduction are realized.

The invention provides a variable-torque cable winding and unwinding device for a mooring unmanned aerial vehicle and a cable winding and unwinding method thereof. The cable winding and unwinding device comprises a driving mechanism and a cable winding mechanism; the driving mechanism comprises a motor, a magnetic powder clutch and a driver, wherein the motor and the magnetic powder clutch are used for driving and controlling the rotation of a cable winding disc, and the driver is electrically connected to the magnetic powder clutch so as to adjust the torque of the magnetic powder clutch by controlling the current changes; and the cable winding mechanism comprises the cable winding disc, a reciprocating connecting rod, a sliding block and a creel stand, wherein the cable winding disc is used for allowing cables to be wound around the cable winding disc, the cable winding disc and the driving mechanism are coaxially arranged and are connected to the output end of the driving mechanism,the reciprocating connecting rod is arranged in parallel with the cable winding disc and is connected to the output end of the driving mechanism, a threaded groove is formed in the reciprocating connecting rod, the sliding block is arranged in the threaded groove of the reciprocating connecting rod and can move along the threaded groove, the cable arranging frame is arranged on the reciprocatingconnecting rod and can do reciprocating motion along the reciprocating connecting rod under the action of the sliding block, and the cables penetrate through the creel stand to be connected to a mainbody of the mooring unmanned aerial vehicle.

The invention relates to a bag-making device used for a full-automatic bag-making machine and a bag-making method thereof. The device has a hot blade, an unwinding mechanism, and a rolling mechanism. The output shaft of an unwinding magnetic powder clutch in the unwinding mechanism is fixedly connected with an unwinding roller. An unwinding rack is provided with a plurality of guiding rollers. One end of an unwinding floating frame is rotatably connected with the unwinding rack. The unwinding floating frame is provided with a plurality of guiding rollers. The unwinding rack is fixedly provided with a push rod device which is rotatably connected with the other end of the unwinding floating frame. The output shaft of a rolling magnetic powder clutch in the rolling mechanism is fixedly connected with a wind-up roller. A rolling rack is provided with a plurality of guiding rollers. A rolling floating frame is arranged on the rolling rack. The rolling floating frame is provided with a plurality of guiding rollers. The rolling rack is fixedly provided with a push rod device connected with the rolling floating frame. The bag-making device solves problems that a common film in a common film bag-making process used for a full-automatic bag-making machine easily melts and deforms, and the device reduces production cost.

The invention discloses a cable storage winch capable of achieving accurate regulation of cable winding tension. The cable storage winch comprises a capstan, a magnetic powder clutch, a rack, a driving motor and a speed reducer; the rack is provided with the capstan, and a roller on one side of the capstan is provided with the magnetic powder clutch; the magnetic powder clutch is in drive connection with a speed reducer shaft; the speed reducer is connected to the driving motor, and the magnetic powder clutch has a slip function; positive and negative poles of the magnetic powder clutch are connected to adjustable power sources used for power supply for the magnetic powder clutch; and the power sources at the two ends of the magnetic powder clutch are provided with circuit breakers. According to the cable storage winch, the cable storage winch in a double-winch winding and unwinding system is driven by the motor, and the magnetic powder clutch is arranged between the speed reducer andthe winch, so that the cable winding tension can be regulated accurately; and the slip function of the magnetic powder clutch can be used for ensuring that the speeds of a towing winch and the cable storage are completely consistent, and the instantaneous speed difference between the towing winch and the cable storage winch is eliminated, so that towing cables can be protected under extreme conditions.