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Elevator Door Knife Coupler
elevator door knife coupler

Elevator Door Knife Coupler

Elevator door knife, the correct name should be the elevator door machine
Product Detail

The device installed on the elevator car door is used to drive the hall door, so as to realize the synchronization of the hall door and car door. It is generally long, so the image is called the door knife.


In the elevator equipment, there is an accessory called the elevator door knife, which improves the safety factor of the elevator door, effectively guarantees the safety of passengers and passengers, flexible response and operation effect.. When the closing force is greater than 150N, the door machine automatically stops and closes the door and opens the door in reverse to protect the door to a certain extent..


Elevator door knife working principle.


The two ends of the traction rope are respectively connected to the car and the counterweight, which are wound on the traction wheel and the guide wheel. The traction motor drives the traction wheel to rotate after the speed change of the reducer. The lifting movement of the car and the counterweight is realized by the traction force generated by the friction between the traction rope and the traction wheel, so as to achieve the purpose of transportation. The guide boots fixed on the car can reciprocate and lift along the fixed guide rail installed on the wall of the building well to prevent the car from deviating or swinging in operation. Normally closed block brake loosens the brake when the motor works, so that the elevator runs, braking in the case of loss of power, so that the car stops lifting and falling, and maintains its static state on the designated floor station, for the access of personnel and goods. The car is a box part that carries passengers or other loads and is reused to balance the car load and reduce the power of the motor. The compensation device is used to compensate the tension and weight changes in the movement of the traction rope, so that the load of the traction motor is stable and the car can be parked accurately. The electrical system realizes the control of the elevator movement, and completes the floor selection, floor leveling, speed measurement and lighting. The call system indicates the car's direction of movement and floor position at any time. Safety devices ensure the safe operation of the elevator.


Dimensions of elevator door knife

630kg elevator door net size of 800*2100;

800kg elevator door net size of 800*2100;

Under 1000KG load, standard door size: 800*2100;

1000KG load, standard door size: 900*2100;

1100KG~1600KG load, standard door size: 1100*2100


Elevator door knife, the correct name should be the elevator door machine, which is also called "open the door machine", is the elevator car door opening and closing device, is mainly responsible for the elevator hall car door opening and closing institution, when the elevator opened, closed signal, the elevator door machine through the built-in control to open the door motor control system, will have a torque motor, into a certain direction of force, close or open the door. The device installed on the elevator car door is used to drive the hall door, so as to realize the synchronization of the hall door and car door. It is generally long, so the it is called the door knife.



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