Elevator tractor

Abstract

The invention provides an elevator tractor, comprising a base, a stator, a rotor, a rotary frame body, a principal axis, a drive rope sheave, a braking device and a braking disc, wherein the base is provided with a stator installation part for the stator, a braking device installation part and a cavity for accommodating the braking device, the braking disc and the braking device installation part; the rotary frame body is provided with a rotor installation part and a drive rope sheave installation part; the outside of the rotor installation part is provided with a gear in the axial direction; the stator is arranged opposite to the rotor in the axial direction; and the stator and the drive rope sheave are respectively arranged at the two sides of the rotor. The elevator tractor of the invention has the characteristics of simple structure, miniaturization, low cost, small noise and the like.

Description

technical field [0001] The invention relates to an elevator traction machine. Background technique [0002] Existing elevator 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 ...

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 leads to dragging

[0003] The outer dimensions of the traction machine become larger, including the required axial dimension of the brake wheel and the height required by the electromagnet, which affect the appearance of the traction machine. It is basically impossible for this traction machine to be applied to machine room-less elevator products. On the other hand This leads to an increase in the parts of the traction machine, an increase in the processing of the parts, and an increase in the cost of the traction machine;

[0004] 5) Since the magnetic steel is installed on the rotor, and the braking surface is also located on the rotor, when the brake arm exerts a braking force on the brake wheel, it will have an impact on the magnetic steel, and such impact will directly affect the magnetic steel and the rotor. connection, which may cause the magnetic steel to fall off from the rotor, causing serious accidents and seriously affecting the operation of the elevator; 6) Since the braking surface is the outer surface of the braking wheel, the requirement for braking force is large. (with two braking surfaces) twice the braking force required by the brake

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

The disadvantage of this invention is that due to the increase of the length of the rotor, on the one hand, the material and processing costs of the rotor will be increased; Torque requirements, and also increase the energy consumption of the traction machine

In addition, since the large ring gear is arranged on the outer circumference of the rotor, it is necessary to increase the installation space of the pinion gear matched with it, thereby increasing the overall size of the traction machine and increasing the cost of the traction machine

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