Tractor used for elevator

Abstract

The invention relates to a tractor used for elevator, comprising a base, a stator, a rotor, a rotating frame, a spindle, a driving rope wheel, a braking device and a brake disk; wherein the base is provided with a stator mounting part of the stator, a spindle supporting part used for rotational support of the spindle, a braking device mounting part of the braking device and a cavity part which can contain the braking device, the brake disk and the braking device mounting part; the rotating frame is provided with a rotor mounting part of the rotor and a driving rope wheel mounting part of the driving rope wheel; the spindle is fixely connected with the rotating frame; the brake disk is fixedly connected with the rotor mounting part, and a braking force can be transmitted onto the rotating frame by virtue of the brake disk; the braking device is provided with a braking surface; and the stator and the rotor are oppositely arranged in the radial direction. The invention has the characteristics of simple structure, miniaturization, low cost and low noise.

Description

technical field [0001] The invention relates to a traction machine for an elevator. Background technique [0002] Existing traction machine, such as the disclosed elevator traction machine of Chinese invention patent (notification number CN1141775C). The electromagnet and the brake arm of the traction machine are arranged outside the traction machine, and the brake arm acts on the brake wheel of the outer rotor of the traction machine to generate a braking force, thereby braking the traction machine. The disadvantages of this invention are: 1) because the brake wheel of the traction machine is located on the same side as the traction wheel and is arranged adjacently, the brake surface is very easily affected by the grease of the steel wire rope like this, thereby causing the friction coefficient of the brake surface to decrease , the normal operation of the elevator has a catastrophic impact; 2) Since the brake is set outside the traction machine, the noise of the brake is ...

AI Technical Summary

Problems solved by technology

The disadvantages of this invention are: 1) because the brake wheel of the traction machine is located on the same side as the traction wheel and is arranged adjacently, the brake surface is very easily affected by the grease of the steel wire rope like this, thereby causing the friction coefficient of the brake surface to decrease , the normal operation of the elevator has a catastrophic impact; 2) Since the brake is set outside the traction machine, the noise of the brake is directly transmitted outside, resulting in an increase in the noise of the traction machine. The application in the elevator will directly affect the running quality of the elevator; 3) In order to reduce the noise, the gap between the friction plate and the brake wheel is usually set very small, so that when the brake arm acts on the brake wheel, due to The action time of the two brakes cannot be consistent, so it may cause the brake wheel to deform in the direction of the force, which may cause the other brake arm to contact the brake wheel, thus causing the friction plate of the other brake arm to wear. Reduce the service life of the brake arm, and may bring vibration and noise to the operation of the elevator; at the same time, in order to ensure that the brake wheel and the brake arm have sufficient rigidity, it is necessary to design a sufficiently strong brake arm and brake wheel, which will increase The cost of the traction machine, and because the inertia of the brake wheel increases, the torque requirement of the traction machine is increased, thereby further increasing the cost of the traction machine; 4) Since the brake arm and the electromagnet are arranged outside the traction machine, On the one hand, the outer dimension of the traction machine becomes larger, including the required axial dimension of the brake wheel and the height required by the electromagnet, which affects the appearance of the traction machine. It is basically impossible for the traction machine to be applied to machine room-less elevator products. , on the other hand, the parts of the traction machine increase, the processing amount of the parts increases, and the cost of the traction machine increases; 5) Since the magnetic steel is installed on the rotor, and the braking surface is also located on the rotor, the braking When the arm exerts a braking force on the brake wheel, it will have an impact on the magnet steel. Such impact will directly affect the connection between the magnet steel and the rotor, which may cause the magnet steel to fall off from the rotor, causing serious accidents and causing serious damage to the elevator. 6) Since the braking surface is the outer surface of the brake wheel, the bra

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