Why is the elevator in the Zifu Fu letter of the gearless traction machine do not use the upstream overspeed protection of the rope device? More
Because the wheel on the traction wheel of the elevator is improved! The elevator gravity is safe on the wheel
The role of the gripper is called the up-speed overspeed protection device, he has two roles A role in the elevator up to run when the speed protection, there is a gear traction machine because the worm was broken, causing the traction wheel itself to turn up, Although the brake holding, in the state of the brake but does not work, and drag the car up the car over the speed of this time is the need to play the rope device, and no gear traction machine without worms so also There is no cochlear tiger class mortar straight hinge trip Leopard busy bar off the problem do not have to grip the rope.
General elevator only down safety protection device, that is, the general said the speed limiter and safety gear and wire loss
