Elevator driving device and supporting structure of driving rope pulley

Abstract

The invention discloses an elevator driving device. The elevator driving device comprises a base, a stator, a rotor, a rotary frame, a main shaft, a driving rope pulley, a braking device, a braking disc and a braking main shaft, wherein the base is provided with a stator mounting part of the stator, a braking device mounting part of the braking device and a cavity in which the braking device, the braking disc and the braking device mounting part are accommodated; the rotary frame is provided with a rotor mounting part of the rotor and a driving rope pulley mounting part of the driving rope pulley; the stator is arranged opposite to the rotor in the axial direction; the stator and the driving rope pulley are arranged on the two sides of the rotor respectively; and the braking main shaft is fixedly connected with the main shaft. The elevator driving device has the advantages of simple structure, miniaturization, low cost, low noise and the like.

Description

technical field [0001] The invention relates to an elevator driving device and a supporting structure for driving a sheave. Background technique [0002] Existing elevator driving device, such as the elevator traction machine disclosed in 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 t...

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 braking force requirement is large, which is twice the braking force requirement of the end face (with two braking surfaces).

The weak point of this invention is: 1) braking device is installed on the outside of elevator machinery, and the noise of braking device is directly transmitted to the outside like this, causes the noise of elevator machinery to be bigger, and elevator machinery will be directly applied in machine-room-less elevator like this Affect the running quality of the elevator; 2) Since the brake disc is directly exposed, the braking surface is easily affected by dust, moisture or oil in the air, resulting in unstable braking force. Will take up more installation space; 3) Because the traction sheave is adjacent to the braking surface, the braking surface is very easily affected by the grease of the wire rope, thereby reducing the friction coefficient of the braking surface, and the normal operation of the elevator brings Disastrous impact; 4) The traction sheave is arranged inside the elevator machinery, so once the traction sheave needs to be replaced due to wear and tear, it will be impossible, and the traction machine can only be replaced, so the repair and maintenance cost of the elevator is too large. Moreover, the condition of the wheel groove of the traction sheave is difficult to observe intuitively, so maintenance is difficult

The weak point of this invention is: 1) in order to reduce noise, the gap between the braking shaft and the braking surface is usually arranged very little, so when the braking shaft acts on the braking surface, due to the two braking The dynamic action time cannot be consistent, so the rotor mounting part may be deformed in the direction of the force, which may cause another brake shaft to contact the braking surface, thereby causing the friction plate of the other brake shaft to wear and reduce the brake shaft. service life, and may bring vibration and noise to the operation of the elevator; at the same time, in order to ensure sufficient rigidity of the braking surface, it is necessary to design a sufficiently strong rotor mounting part, that is, the thickness of the rotor mounting part increases, which will increase the traction machine. cost, and because the inertia of the rotor mounting part increases, the torque requirement of the traction machine is increased, thereby further increasing the cost of the traction machine; 2) In order to ensure a uniform gap between the braking shaft and the braking surface, the braking surface must Finishing, the cost of such processing increases; 3) Since the friction plate of the brake shaft often has wear debris, these wear debris are likely to fall on the braking surface, which may cause the friction of the brake device to be unstable. The normal operation of the elevator has a serious impact, so it is necessary to regularly clean up these grinding debris, or use a chip removal device to deal with these grinding debris, which will increase the workload of repair and maintenance, and increase the use cost of the traction machine; 4 ) Because the braking surface and the rotor mounting part are arranged on the rotating support frame oppositely, when the braking shaft generates braking force on the braking surface, it also produces an impact on the rotor, and such impact will directly affect the rotor and the rotating support frame The connection between the rotor mounting parts of the rotor will cause the rotor to fall off from the rotating support frame, thereby causing serious accidents and seriously affecting the operation of the elevator; 5) Since the braking surface is the inner circumferential surface of the rotor mounting part, the braking force The requirements are large, which is twice the braking force requirement of the brake device on the end face (with two braking surfaces), which increases the size and cost of the brake device and affects the structural size of the traction machine at the same time

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