79results about How to "Prevent topping" patented technology

The invention discloses a lifting-type maintenance platform system for a tower frame of a wind generation set. The tower frame is internally provided with a bottom platform and a top platform. An operation mechanism comprises a running rail fixedly arranged between the top platform and the bottom platform and a lifting platform which is connected with the running rail. A driving device comprises a driving motor and a driving steel wire rope. An output shaft of the driving motor is connected with the lifting platform through the driving steel wire rope. A monitoring device comprises a top positioning sensor and a bottom positioning sensor. The top positioning sensor and the bottom positioning sensor are both used for detecting a position of the lifting platform. A control unit comprises a main control module and a manual control module. The main control module is connected with the driving motor, the manual control module, the top positioning sensor and the bottom positioning sensor. The main control module is used for controlling start and stop of the driving motor. According to the lifting-type maintenance platform system for the tower frame of the wind generation set, the lifting-type maintenance platform system can be started and stopped at any positions according to demands of running and maintenance, automatic lifting can be achieved, the structure is simple and using is convenient.

The invention discloses a bolt type safety guaranteeing structure for an elevator. The bolt type safety guaranteeing structure comprises at least two fixing mechanisms which are transversely arranged in an elevator shaft. The fixing mechanisms are connected with a power mechanism. After an elevator car reaches the floor and stops, the power mechanism drives the fixing mechanisms to transversely extend out to limit the elevator car, and the elevator car is limited from moving upwards or downwards. Fixing pins capable of performing telescopic movement are arranged, and after the elevator reaches the floor, the fixing pins extend out to limit upward or downward movement of the elevator, that the situation that after reaching the floor, the elevator suddenly falls down or rushes upwards is effectively prevented, and the safety of the elevator is greatly improved.

The invention provides a furnace cover for a production furnace, which is characterized by comprising a supporting beam, a hoisting and fastening ring frame, T-shaped metal bolts and at least one refractory brick layer, wherein the hoisting and fastening ring frame is arranged below the supporting beam and is connected with the supporting beam; the T-shaped metal bolts comprise horizontal bolts and vertical bolts, and the vertical bolts of the T-shaped metal bolts are hoisted and fastened on the hoisting and fastening ring frame; the at least one refractory brick layer consists of a plurality of refractory bricks, and is hung on the hoisting and fastening ring frame through the plurality of T-shaped metal bolts; each refractory brick layer comprises two adjacent refractory bricks fixedly connected through one T-shaped metal bolt; each refractory brick is provided with an insertion silt; and the horizontal bolt of one T-shaped metal bolt is respectively inserted into the corresponding insertion silts of the two adjacent refractory bricks. The furnace cover has the advantages of safe use, high-temperature resistance, simple structure and simple and convenient maintenance.

The invention discloses a fermenting tower for innocuous treatment to farm waste. The fermenting tower comprises a tower body and two supporting columns, wherein power heads are fixed at the upper parts of the supporting columns; the tower body transversely lays between the supporting columns; the outer walls of the two sides of the tower body are fixedly connected with fixing discs; the inner wall of one side of the tower body is fixedly connected with a primary hydraulic cylinder; the inner wall of the other side of the tower body is fixedly connected with a secondary hydraulic cylinder; a hydraulic rod of the primary hydraulic cylinder is sleeved by a primary piston head; a hydraulic rod of the secondary hydraulic cylinder is sleeved by a secondary piston head; the primary piston head and the secondary piston head do opposite movement; arc-shaped heating plates are wrapped and fixed on the wall of the tower body; a rubber spacer is arranged between two adjacent heating plates; a ventilating disc is further arranged on the tower body; the ventilating disc is fixedly connected with a venting box. The fermenting tower is simple in structure, convenient to use and good in gas-liquid separating and deodorizing effects, and can reduce concentrations of harmful gases and intermediates in waste gas.

The invention discloses a star sealing contactor detection method and device for an elevator. The method comprises the steps that a lift car is controlled to stop on a top flat layer, and an elevator band-type brake device is opened; timing is conducted while the opening signal of the band-type brake device is received, and the real-time speed or the real-time acceleration of rotation of the traction machine when the elevator slides upwards is monitored in real time within the preset time; if the preset time is not reached, the real-time speed is larger than the preset speed or the real-time acceleration is larger than the preset acceleration, the elevator control system judges that the star sealing contactor is in a non-effective state; and if the real-time speed is not greater than the preset speed or the real-time acceleration is not greater than the preset acceleration after the preset time is reached, judging that the star sealing contactor is in an effective state. According to the invention, the buffer idle stroke between the counterweight and the buffer is utilized, so that the no-load elevator slides upwards to simulate the sliding of the elevator under the fault condition, whether the star-sealing contactor is in an effective state is judged through the speed or acceleration signal, and the defect that the star-sealing contactor is detected by adopting a conventional contact on-off detection mode is avoided.

The invention discloses an emergency buffer device capable of preventing a lift car from rushing to the top and an elevator using the emergency buffer device. The emergency buffer device comprises an elevator derrick, a mounting seat, a servo motor, a power shaft and the like. The mounting seat is fixedly mounted on the right side of the top face of the elevator derrick, the servo motor is fixedly mounted on the mounting seat, and the power shaft is welded to the left end of an output shaft of the servo motor. Speed reduction calipers make contact with the power shaft, the speed reduction calipers exert resistance on the power shaft, so that the rotating speed of the power shaft and the rotating speed of devices on the power shaft are gradually decreased, meanwhile, through the effect of a first compression spring, a shifting clamping rod limits a movable limiting wheel, the rotating speed of the movable limiting wheel is decreased, the lifting speed of the lift car is decreased, then the lift car can stop in the gradual deceleration process, and the phenomenon that the lift car ascends too fast and rushes to the top when the braking effect of a brake is insufficient is prevented.

A pinion-and-rack driven elevator using a planetary gear reducer is characterized in that a power transmission system includes a planetary gear reducer and a synchronous belt transmission system; an electric traction system is a motor system including a permanent magnet direct current motor system or a permanent magnet alternating current synchronous motor system; a right lower drive gear and a right upper drive gear are engaged with a right rack fixed in the vertical direction, and a left lower drive gear and a left upper drive gear are engaged with a left rack fixed in the vertical direction; rolling guide shoe rollers are elastically pressed against non-tooth-shaped guide rail surfaces of the left rack and the right rack and drive an elevator car to move upward or downward; a power loss band-type brake is arranged on a brake wheel coaxial to the motor, and a dual-backup structure is adopted; and an electric interlocked and mechanical interlocked outage star-connection unit circuit is arranged in an electrical control system.

The invention discloses a lift used for constructional engineering and relates to the field of lifts. The lift comprises a lift body, wherein the lift body comprises two traction machines, a guide rail frame, a top beam, pulleys, a steel wire rope and lifting cages, wherein the top beam is arranged at the top of the guide rail frame; the four pulleys are symmetrically arranged on the top beam, wherein two pulleys are arranged at the bottom of the guide rail frame; the lifting cages are arranged on the two sides of the guide rail frame respectively; the two ends of the steel wire rope penetrate through the two pulleys and are connected with the lifting cages and the traction machines respectively; two guide rails are arranged on one face, which is in contact with each lifting cage, of the guide rail frame; rolling wheels are arranged at the corresponding positions of the side surfaces of the lifting cages and are clamped on the guide rails; the end part of the top beam is connected with the guide rail frame by steel rods between the top beam and the guide rail frame; protection walls are arranged at the peripheries of the lifting cages in the horizontal plane; the two steel rods can be used for balancing vertical drawing forces on the top beam by the lifting cages on the two sides, so as to prevent the top beam from being bent.

The invention discloses a pinion-and-rack type elevator under balanced drive. The pinion-and-rack type elevator is characterized in that a driving system is a balanced driving system; an active force transmission system is a synchronous belt transmission system; an electric traction system is a permanent magnet direct current motor system or a permanent magnet alternating current synchronous motor system; a lower right driving drive gear and a lower right driven drive gear are engaged with a right rack which is fixed in the vertical direction from the back and the front of the lower portion, an upper right driving drive gear and an upper right driven drive gear are engaged with the right rack which is fixed in the vertical direction from the back and the front of the upper portion, a lower left driving drive gear and a lower left driven drive gear are engaged with a left rack which is fixed in the vertical direction from the back and the front of the lower portion, and an upper left driving drive gear and an upper left driven drive gear are engaged with the left rack which is fixed in the vertical direction from the back and the front of the upper portion, so that a lift car system of the elevator is driven to ascend or descend; a brake wheel, coaxial with a motor shaft, of the elevator is configured with a double-backup power-losing braking brake; and an electric control system is internally provided with a 'power failure star connection' unit circuit which is electrically interlocked and mechanically interlocked.

The invention discloses an on-duty identification method of fire protection duty room personnel based on artificial intelligence, including a PC-side module, a CPU module, a safety management module and an on-duty identification module; A PC module output terminal is connected with an input terminal of an Internet network module, An output end of that Internet network module is connected with an input end of the CPU module, An input end of the on-duty identification module is connected with an output end of the camera module and an output end of the fingerprint identification module; that output end of the on-duty identification module, the output end of the safety management module, the output end of the person activity area limit module and the output end of the fingerprint input moduleare connected with the input end of the CPU module, and the output end of the CPU module is connected with the input end of the display module and the input end of the alarm module; The invention adopts the real-time video monitoring and alarming system, realizes the automatic monitoring and alarming function of the on-duty personnel, enables the management personnel to know the on-duty personneland the operation situation of the on-duty site in real time, and detects the safety hidden danger in the office site in real time.

The invention discloses a heavy-load stacking machine. The heavy-load stacking machine can achieve three-dimensional storage on large-mass and large-size materials, the stacking machine comprises a portal frame and a lifting platform, the portal frame is formed by connecting a top beam, a bottom frame and two stand columns, and the lifting platform is of a frame type structure and can meet the strength and rigidity requirements needed by storing and taking of ultra-heavy objects; and the lifting platform comprises a support with inclined struts, a conveying platform is arranged on the support,vertical frames are symmetrically arranged on the two sides of the support and fixedly connected through first connecting beams, movable pulleys, safety protection devices, anti-settling devices anda plurality of first guide wheels are arranged on the vertical frames, the first guide wheels are in rolling connection with the lifting rails, the movable pulleys are connected with fixed pulleys through first steel wire ropes, and the two safety protection devices are fixedly connected through connecting rods. Therefore, the stacking machine has good reliability and safety, normal operation of equipment is guaranteed, safety of the equipment and goods can be effectively guaranteed, and safety accidents are avoided.

A rack-and-pinion lifting device with face gear transmission, characterized in that the transmission system includes a face gear transmission system, and the motor system includes a permanent magnet DC motor system or a permanent magnet AC synchronous motor system; the face gear transmission system includes a first-stage Drive gear shaft, primary face gear, secondary drive shaft, secondary drive gear, secondary face gear, driving drive shaft, left driving gear, left driven gear, left driven gear shaft, right driving gear, right driven Gear, right driven gear shaft; face gear transmission is significantly larger than ordinary bevel gear transmission; pinion gear is not affected by axial force, which can simplify support and reduce system weight; at the same time, the common normal line of the meshing tooth pair is the same, for power The transmission is extremely beneficial; the face gear transmission can ensure the transmission with a fixed transmission ratio, which is conducive to improving the stability of operation and reducing vibration and noise; it can significantly improve the operation efficiency and quality, save materials, save energy, and protect the environment.

The invention discloses a mechanical elevator stopping device which comprises a triggering device fixed to a cage frame and a bearing device fixed to a cage guide rail. The triggering device comprises an electric push rod support. An electric push rod is arranged on the electric push rod support. A bearing rod support is arranged beside the electric push rod support. A bearing rod is arranged on the bearing rod support. The electric push rod is connected with the bearing rod. The electric push rod support and the bearing rod support are fixed to the cage frame. The triggering device further comprises a position switch. The bearing device comprises a movement stopping plate opposite to the bearing rod. The movement stopping plate is fixed to the cage guide rail through a fixing device and provided with a vertical U-shaped groove matched with the bearing rod. A safety triggering device is arranged beside the U-shaped groove. The mechanical elevator stopping device has the advantages of being high in efficiency and good in stopping effect.

The invention relates to a hanging frame structure of non-avoidance three-dimensional parking equipment. The hanging frame structure comprises a column sleeve, wherein the front side of the column sleeve is provided with a front pulley block, the back side of the column sleeve is provided with a back pulley block, and the left side and the right side of the column sleeve are respectively provided with a side pulley block. The hanging frame structure has the beneficial effects that (1) the periphery of the hanging frame is respectively provided with the pulley blocks, the hanging frame can be attached to the four sides of the rotary vertical column of the three-dimensional parking equipment, and the smoothness, reliability and safety of the lifting movement of the hanging frame are ensured; (2) each side pulley block consists of more than two pulleys, and while the lifting movement of a lifting vehicle bedplate is guided, the function of preventing the top rush of the lifting vehicle bedplate is also realized; and (3) a flange for connecting the vehicle bedplate and the hanging frame adopts bolt connection, the vehicle bedplate and the hanging frame are connected into an L shape, and the connecting part is provided with a reinforcing plate, so the bearing capability of the connecting part is improved; and by adopting the bolt connection, the vehicle bedplate and the hanging frame can be detached for convenient transportation.

The invention provides a synchronous belt main transmission balanced driving rack and pinion elevator. A power transmission system is a synchronous belt main transmission system, the driving system is a balanced driving system, a power dragging system is a permanent magnet DC motor system or a permanent magnet AC synchronous motor system, the balanced driving means that the driving force for driving an elevator car is in left-right symmetry, front-back symmetry, and top-bottom symmetry, The power transmission relation of the synchronous belt main transmission system is that a main power transformation transmission system drives a power shunting transmission system, the power shunting transmission system drives a rack and pinion balanced driving system. A brake wheel coaxial with a motor shaft is equipped with a double-backup power-lossing band-type brake, a 'power-off star connection' unit circuit integrating electrical interlocking and mechanical interlocking is arranged in an electrical control system. The elevator has the beneficial effects of alleviating the self-weight, improving effective transport capacity, and saving energy.

The invention discloses a traction device with a manual rescue mechanism. The traction device with the manual rescue mechanism comprises an elevator control system for controlling the operation of anelevator, a traction machine, a traction wheel connected to the traction machine, and a hoisting rope wound on the traction wheel, wherein one end of the hoisting rope is connected to a lift car; theother end of the hoisting rope is connected to a counter weight; the traction wheel is coaxially connected to a worm wheel; a worm is meshed with the worm wheel to form a locking mechanism of the traction wheel; the worm is connected to a protection motor; the protection motor and the traction machine are all made of servo motors; a synchronous controller controls the rotating speeds of the traction machine and the protection motor according to the transmission ratio of the worm to the worm wheel, so that the speed ratio of the worm to the worm wheel is synchronized with the transmission ratioof the worm to the worm wheel; and when the load of the protection motor exceeds the maximum set value, the elevator control system cuts off power supplies of the protection motor and the traction machine. When an elevator system is powered off or breaks down, the traction device with the manual rescue mechanism can realize the reliable braking of the traction wheel, and effectively avoids the safety accident of car topping or bottoming.

The invention discloses an elevator operation state display method and device based on the Internet of Things, and the method comprises the following steps: obtaining work state information of an operator; obtaining current working states and working parameters of the plurality of elevators; according to the current working state and the working parameters, acquiring the actual motion trails of all the elevators in the future preset time period; generating a presumption result of whether each elevator is collided or not according to a actual motion trail; and sending the working state information and the presumption result of the operator to a display terminal. According to the technical scheme, collision of the elevator can be avoided.

The invention relates to a hydraulically-driven shackle hook. The hydraulically-driven shackle hook comprises a hook body, a second bearing is mounted on the lower portion of a first bearing which is mounted at the top of the hook body, a bearing fixing device is connected with a hook fixing device which is connected with a hydraulic device fixing frame, a hydraulic device with a hydraulic cylinder is mounted on the hydraulic device fixing frame, and an electromagnetic valve is mounted on the hydraulic cylinder and connected with a storage battery and a wireless signal receiver. The hydraulic cylinder is connected with a connecting rod which is connected with a connection base, the hook fixing device is connected with a pulley block fixing frame, an anti-collision protective device is mounted at the top of the pulley block fixing frame, a pulley shaft is mounted on a pulley block which is mounted in the pulley block fixing frame, and the hook body is provided with an unhooking preventing protection device. The hydraulically-driven shackle hook has advantages of reasonable design, convenience in mounting and utilization, time saving, labor saving, high operation efficiency, realization of precision 90-degree rotation, effectiveness in rotation control, safety, reliability, wide application range and long service life.

The invention discloses a construction lift for a building under construction. The construction lift comprises a guide track bracket, a cage and a motor. The construction lift is equipped with an anti-dropping system which comprises a rope grabbing device and a safety rope. The rope grabbing device is arranged on the cage of the construction lift; one end of the safety rope is connected at a setting position above the cage; the safety rope extends from top to bottom to run through the rope grabbing device arranged on the cage and is connected and fixed at a proper position below the cage; the rope grabbing device is sleeved at the outer side of the safety rope and can lift and descend freely on the guiding track bracket of the construction lift; and when the rope grabbing device is activated, the cage grabs and fixes the safety rope through the rope grabbing device.

The invention discloses a crane lifting adjusting device, which comprises a vibration reduction arm, a rotary supporting arm, a lifting adjusting arm, a lifting rope limiting bush, a mounting frame and a rotary fixing frame, wherein the rotary fixing frame is arranged on the mounting frame, a rotary shaft is arranged on the rotary fixing frame, a connecting arm is arranged in the middle of the rotary shaft, the left end of the vibration reduction arm is rotationally connected with the connecting arm, the left end of the lifting adjusting arm is rotationally connected with the vibration reduction arm, the rotary supporting arm is arranged under the vibration reduction arm, the left end of the rotary supporting arm is fixedly connected with the rotary shaft, a weight detection table is arranged between the rotary supporting arm and the vibration reduction arm, and a weight sensor is arranged between the weight detection table and the rotary supporting arm. According to the invention, the crane lifting adjusting device is novel in structural design, double protection is conducted on lifting equipment, goods are prevented from rushing to the top, safe operation of lifting work is guaranteed, operation is convenient, the working efficiency is greatly improved, the position of the lifting hook can be finely adjusted, and the practicability of the lifting device is improved.

The invention relates to an elevator traction mechanism with a safety loop detecting system, and the elevator traction mechanism solves the defects in the prior art. According to the technical scheme,the key point is that the elevator traction mechanism comprises a safety loop, a plurality of switch detecting modules, a safety bus and an upper control system, wherein the safety loop comprises a master switch, a plurality of limiting switches and a safety switch; a power supply is connected to a primary safety contactor coil through the safety loop; each switch detecting module is correspondingly provided with a master switch, a limiting switch or a safety switch, the output end of the switch detecting module is in communication connection to the upper control system through the safety bus, the first detecting end of the switch detecting module is connected to a movable contact of the master switch, a movable contact of the limiting switch or a movable contact of the safety switch, andthe second detecting end of the switch detecting module is connected to a movable contact of the master switch, a movable contact of the limiting switch or a movable contact of the safety switch; thesafety bus is used for connecting all switch detecting modules to the upper control system; and the upper control system receives output signals of all switch detecting modules and a synchronous controller through the safety bus to control operation of an elevator.

The invention provides an elevator safety device, and relates to the technical field of elevator safety. A pair of penetrating hole supporting plates are perpendicularly arranged in parallel, through holes in the penetrating hole supporting plates correspond one to one, a sliding bolt guide rail is perpendicularly arranged on the right side of one penetrating hole supporting plate, a pair of sliding bolts are matched with the sliding bolt guide rail through a sliding bolt lifting rope, a plurality of movable telescopic steel bars are evenly and horizontally arranged between the sliding bolt lifting rope and the other penetrating hole supporting plate, the telescopic steel bars are arranged in the corresponding through holes in the pair of the penetrating hole supporting plates in sequence in a penetrating mode, springs are arranged on the outer walls, between the penetrating hole supporting plate and the sliding bolt lifting rope, of the telescopic steel bars in a sleeved mode, the springs are fixed to the right ends of the telescopic steel bars, and the lower end of the sliding bolt lifting rope is connected with the power output end of a motor. The elevator safety device is scientific and reasonable in design and simple and practical in structure, an elevator car is protected in real time in the up and down operating process of the elevator car, the probability that the elevator car falls down and crushes the top is lowered, and the safety of the elevator is improved.

The invention discloses a crane control method, a system and a crane. The method comprises: acquiring an image capable of showing rope winding state on a coiling block; performing decoding and binarization processing on the image to generate a data matrix; determining the rope winding state on the coiling block based on the data matrix, and controlling an electric motor to drive the coiling block to lift heavy stuff when the rope winding state is a rope chaos state; and comparing the data matrix and a preset data matrix, and according to the compared result, executing at least one of the following operations: sending out a lifting hook over-hoisting signal, making a lifting mechanism decelerated and braking the lifting mechanism. According to the above technical scheme, the rope winding state on the coiling block and the position of the lifting hook can be determined by processing the images, and corresponding operations are executed for prevention on rope chaos and over hoisting.

The invention discloses an automatic stirring and supplying device for a ball press, and belongs to an automatic loading device. The device is characterized by comprising a bin, a conveyer and a loading assembly; the bin comprises a feed opening, a bin middle shaft, a stirring motor, a turntable, a ratchet wheel, a spring fixing clamp, a travel switch, a driving gear, a pawl, an auger motor, an auger bracket, an auger, a baffle plate and a spring; the travel switch is in circuit connection with the stirring motor; the conveyer is driven by a transmission motor; the loading assembly comprises a loading rack, a motor rack, a loading motor, a driving shaft, a driven shaft, a chain wheel, a hinge, a scraper bucket, a hopper, a sensor and a power supply travel switch; and the power supply travel switch is connected with a master power supply circuit. Compared with the prior art, the device has the advantages that: stirring and feed conveying in the bin are synchronously performed, so that uniform mixing of coal dust and yellow mud is ensured, and agglomeration is prevented; manpower and cost are saved; and the material flow is good in stability and more uniform.

The invention discloses a standby braking device for a well chamber elevator. The standby braking device comprises an elevator car, a control mechanism arranged in the elevator car and a wall grabber mechanism matched with the control mechanism; the control mechanism comprises a control button arranged on the upper side of a control panel in the elevator car, a rotating shaft arranged on the upper side of the control button and a baffle rotationally matched with the rotating shaft; the wall grabber mechanism comprises vacuum suction cups symmetrically arranged on the two sides of the elevator car and connecting fasteners for connecting the vacuum suction cups and the elevator car. When a braking device of the elevator breaks down, the elevator stops in an unconventional position, the control button in the control mechanism is used for manually controlling the wall grabber mechanism to pop up the suction cups to temporarily fix the elevator, accidents such as top rushing or rapid falling are prevented from occurring when the braking faults are eliminated, the suction cups are recovered after the faults of the braking device are eliminated, the suction cups can be used again, the accident rate is reduced, and the standby braking device is worthy of wide popularization.

The invention discloses a planet gear speed change synchronous belt transmission symmetric driving gear rack elevator. A power transmission system includes a planet gear speed reducing system and a synchronous belt transmission system; a driving system is a gear rack symmetric driving system; an electric traction system includes a permanent magnetic direct-current motor system or a permanent magnetic alternating-current synchronous motor system; power sent by the electric traction system is decelerated through the planet gear speed reducing system; a double-surface gear synchronous belt power conversion transmission system converts the power in the rotating direction sent by the electric traction system to two types of power with the same speed and opposite directions; a synchronous belt power shunting system transfers the power to a symmetric driving system to drive a car to operate; a double-backup power losing brake is arranged on a brake wheel coaxial with a motor shaft; a power losing start connection unit circuit provided with electric interlocking and mechanical interlocking is arranged in an electric control system; and the elevator has the beneficial effects of self weight reduction, transport capacity improvement and energy saving.

The invention relates to a heavy hammer counterweight device for a belt conveyor, the conveyor and a using method. The heavy hammer counterweight device comprises a tower main body, a first heavy hammer box and a second heavy hammer box, wherein the first heavy hammer box is arranged on the tower main body in a driven sliding manner and is connected with a tensioning mechanism, the first heavy hammer box has a first suspension state in which the first heavy hammer box is independent or is matched with the second heavy hammer box to jointly pull the tensioning mechanism, the second heavy hammerbox is arranged on the tower main body in a driven sliding manner and is connected with the first heavy hammer box, the second heavy hammer box has a second suspension state for pulling the first heavy hammer box to increase the tensioning force required for pulling the tensioning mechanism by the first heavy hammer box, and a second landing state for not pulling the first heavy hammer box. The device is advantaged in that a problem that a heavy hammer balance weight device with a belt conveyor in the prior art is tensioned by means of constant gravity, and the corresponding tensioning forcecannot be selected according to working conditions in different environments is solved.

The invention discloses an elevator traction mechanism. The elevator traction mechanism comprises an elevator control system for controlling elevator running, a traction machine, a traction wheel connected with the traction machine, and traction ropes wound around the traction wheel. One ends of the traction ropes are connected with an elevator car, the other ends of the traction ropes are connected with counter weights, the traction wheel is coaxially connected with a worm gear, a worm is engaged with the worm gear, and accordingly a traction wheel locking mechanism is formed. The worm is connected with a protection motor, and the protection motor and the traction machine adopt servo motors. A synchronous controller controls the rotation speed of the traction machine and the protection motor according to the transmission ratio of the worm and the worm gear, and the rotation speed ratio of the worm and the worm gear and the transmission ratio of the worm and the worm gear are kept synchronous. When the load of the protection motor exceeds the maximum set value, the elevator control system cuts off a power source of the protection motor and the traction machine. By means of the elevator traction mechanism, reliable traction wheel braking can be achieved when the elevator system is powered off or breaks down, and safety accidents of elevator car roof rushing or bottom squatting are effectively avoided.

The invention relates to a double-machine traction device, and solves the defects of incapability of quickly braking a car, low braking reliability and low elevator safety easily caused by insufficient braking force due to emergent braking in a traditional elevator through a brake. The double-machine traction device comprises a tractor, a traction wheel, a worm gear mechanism, a rescue motor and asynchronous mechanism. A worm wheel is coaxially connected with the traction wheel, and is synchronously rotated with the traction wheel; through a mechanical transmission mode, the synchronous mechanism is connected with a worm rod, and drives the worm rod to maintain synchronous rotation with the worm wheel; and the worm rod is driven to rotate only during rescuing. The worm rod is engaged withthe worm wheel to form a locking mechanism of the traction wheel, so that the reliable braking of the traction wheel can be realized when an elevator system is powered off or failed, and the accidents of roof collision or bottom collision of cars are effectively prevented; and the rescue motor drives the worm rod to drive the traction wheel to rotate to realize timely rescue.