JPH08192974A - Winch device of elevator - Google Patents

Abstract

PURPOSE: To achieve safety and low noise generation without causing damage of bearings and gears with abrasive dust such as iron powder as foreign matter by allowing a permanent magnet furnished at the bottom of a gear box to attract the iron powder contained in a lubricating oil. CONSTITUTION: A permanent magnet 31 and an iron wire layer 33 are furnished at the bottom 11b of a gear box 11. Accordingly the abrasive dust of gears, etc., floating in a lubricating oil 34 is attracted by the magnet 31 or to the layer 33 magnetiozed thereby. The attracted abrasive dust will not be separated even though the lubricating oil 34 is stirred by rotation of gears. Besides the effect to attract the abrasive dust, the iron wire layer 33 exerts a good effect of preventing separation of abrasive dust likely with stirring. This eliminates occurrence of poor operation due to abrasive dust, prevents failure in roller bearings, precludes damage of gear flanks, and enhances the stability and reliability of the performance as a winch device of elevator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting device for an elevator, and more particularly, to a gearbox of a speed reducer that is interlocked with an electric motor provided with an electromagnetic disc brake.

[0002]

2. Description of the Related Art Generally, a hoisting elevator is a hoisting device in which a car 1 and a counterweight 2 are connected to both ends of a rope 3 as shown in FIG. 5, and the rope 3 is provided in a machine room above the hoistway. 4 and a control device (not shown) rotate the hoisting sheave 5 while controlling the speed, so that the car 1 and the counterweight 2 are moved up and down via the rope 3.

Here, the hoisting device 4 is, as shown in FIG.
The electric motor 6, a speed reducer 8 linked to the electric motor 6 via a coupling 7, the hoisting sheave 5 provided on the output shaft 9 of the speed reducer 8 and the input shaft 10 of the speed reducer 8 are provided with a braking force. The gearbox 11 of the speed reducer 8 is composed of an electromagnetic disc brake 12 attached to a side portion 11a on the side opposite to the electric motor.

The speed reducer 8 is a gear box 11 as shown in FIG.
It is decelerated by the multistage gears 13a, 13b, 13c, 13d provided inside, and its input shaft 10 penetrates through both side walls of the gear box 11, and by bearings 14 and 15 provided on the side portions 11a, respectively. It is supported.

Electromagnetic disc brake 12 of the input shaft 10
The inner bearing of the side bearing 14 is fixed to the step portion of the input shaft 10 and the bearing nut 16, and the outer ring is fixed to the step portion of the hole of the gear box 11 and the inlay portion 17a of the bearing pressing lid 17.

On the other hand, in the bearing 15 on the electric motor side, the inner ring is the input shaft 10
The outer ring is freely supported in the axial direction in the hole of the gear box 11 in consideration of the thermal expansion of the input shaft 10, while being fixed by the step portion and the bearing nut 18. The intermediate shaft 19 and the output shaft 9
The same is true for.

The electromagnetic disc brake 12 is of a non-excitation type as shown in FIG. 8. When the elevator car 1 is stopped, the current to the magnet 21 is cut off, and the disc 22 is attached to the friction plate 24 by the spring 23. By being pressed, a frictional force is generated between the disc 22 and the friction plate 24 and between the disc 25 and the friction plate 24, and a braking force is applied to the input shaft 10 integrated with the friction plate 24 and the boss 26. To be

[0008] In addition, the magnet 21 during the elevator car raising and lowering operation
Is energized, the disk 22 is attracted to the hood 20 side against the spring 23 by the electromagnetic force of this magnet 21,
22, the friction plate 24, and the disk 25 are separated from each other and become free, so that the brake of the input shaft 10 is released and the input shaft 10 freely rotates.

[0009]

However, since the conventional elevator hoisting device is constructed as described above, when the magnet 21 of the electromagnetic disc brake 12 is energized and a magnetic force is generated, the magnet frame 20 is magnetized. As a result, the gear box 11, the input shaft 10, the bearing 14 and the like that are in contact with or close to the magnet frame 20 are magnetized.

The bearing 14 is lubricated by gears 13a, 13b, 13c, 13
It is also used as the lubricating oil of d, and the oil bath type lubricating oil (a predetermined amount is injected into the gear box 11 as shown in FIG. 9) is lifted by the rotation of the gears 13a, 13b, 13c, 13d. , To supply the bearing 14.

In the gear box 11, gears 13a, 13b, 13c, 13 are provided.
d. Small machining powder when manufacturing the gear box 11, foreign matters such as friction powder of gears are floating in the gear lubricating oil. These iron powders are mixed with the lubricating oil and supplied to the bearing 14, but in the state where the bearing 14 is not magnetized, the amount of the iron powder is small and it only passes through the bearing 14 temporarily. There is no big problem. However, when the bearing 14 is magnetized, the iron powder stays in the bearing 14 and gradually remains in the bearing 14 as a large residue.

When the iron powder reaches a certain amount, the bearing 14
It becomes a resistance between the rolling element and the inner and outer rings, and generates noise. Furthermore, there is a possibility that the rolling elements and the inner and outer rings will be damaged and the bearing 14 will need to be replaced. Therefore, an object of the present invention is to provide a hoisting device for an elevator that is safe and has low noise without damaging bearings and gears with foreign matter such as iron powder.

[0013]

In order to achieve the above object, the present invention provides a gear box in which multi-stage gears are provided, a gear box into which lubricating oil of these gears is injected, and the gears described above. An electric motor for driving the motor, an input shaft driven by the electric motor, the input shaft having the gear, a bearing provided on a side portion of the gear box, supporting the input shaft, and provided outside the gear box, Provided is an elevator hoisting device including an electromagnetic disc brake that controls the rotation of a friction plate connected to an input shaft, and a permanent magnet that is provided at the bottom of the gear box.

According to the invention corresponding to claim 2, in the elevator hoisting device according to claim 1, there is provided an elevator hoisting device in which an iron wire layer formed of a mesh-like iron wire is provided on an upper surface of the permanent magnet. provide.

According to the invention corresponding to claim 3, in the hoisting device for an elevator according to claim 1, a magnetic shield material is interposed between the permanent magnet and the inner wall of the gear box. To provide a hoisting device.

According to a fourth aspect of the invention, there is provided the elevator hoisting device according to the first aspect, wherein the permanent magnets are provided on the bottom of the gear box at predetermined intervals.

According to the invention corresponding to claim 5, in the elevator hoisting device according to claim 1, the uneven surface is formed on the permanent magnet, and the permanent magnet is arranged so that the uneven surface is an upper surface. An elevator hoisting device is provided.

[0018]

With the above construction, in the invention corresponding to claim 1, wear powder such as iron powder contained in the lubricating oil is adsorbed by the permanent magnet provided at the bottom of the gear box. Claim 2
In the corresponding invention, abrasion powder such as iron powder adsorbed by the iron wire net is prevented from being dispersed.

In the invention corresponding to claim 3, the magnetism of the gear box is prevented by the magnetic shield material. In the invention corresponding to claim 4, the permanent magnets are provided at predetermined intervals at the bottom of the gear box, and a gap is formed between the permanent magnets. In the invention corresponding to claim 5, an uneven surface is formed on the permanent magnet and the attracting surface is widened by arranging the uneven surface to be the upper surface.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As in the conventional case, the hoisting device 30 of the present embodiment is provided on the electric motor 6, the speed reducer 8 linked to the electric motor 6 via the coupling 7, and the output shaft 9 of the speed reducer 8 as shown in FIG. The side portion 11 of the gearbox 11 of the speed reducer 8 on the side opposite to the electric motor 11 to apply a braking force to the winding sheave 5 and the input shaft 10 of the speed reducer 8.
It is composed of an electromagnetic disc brake 12 attached to a.

The speed reducer 8 is decelerated by multi-stage gears 13a, 13b, 13c, 13d provided in a gear box 11, and its input shaft 10 penetrates both side walls of the gear box 11 and has side portions. 11
It is supported by bearings 14 and 15 provided on a, respectively.

An electromagnetic disc brake 12 of the input shaft 10
The side bearing 14 has an inner ring fixed to the step portion of the input shaft 10 by a bearing nut 16, and an outer ring fixed to the step portion of a hole of the gear box 11 and a spigot portion 17a of a bearing pressing lid 17.

On the other hand, in the bearing 15 on the electric motor side, the inner ring is the input shaft 10
The outer ring is freely supported in the axial direction in the hole of the gear box 11 in consideration of the thermal expansion of the input shaft 10, while being fixed by the step portion and the bearing nut 18. The intermediate shaft 19 and the output shaft 9
The same is true for.

FIG. 2 is a side sectional view of the gear box 11. The bottom 11b of the gear box 11 has a permanent magnet 31 laid on the entire surface, and the permanent magnet 31 and the inner wall surface of the gear box 11 are connected to each other. A magnetic shield material 32 is provided between them. On the upper surface of the permanent magnet 31, fine mesh-like iron wires are provided in layers, and in the iron wire layer 33, coarse gaps are formed. In the gear box 11, the input shaft 10,
Lubricating oil 34 for the output shaft 9, the intermediate shaft 19, the bearings 14, 15 and the like is stored.

In this embodiment thus constructed, since the permanent magnet 31 and the iron wire layer 33 are provided on the bottom portion 11b of the gear box 11, the teeth 13a, 13b, 13c, 13d, etc. floating in the lubricating oil 34 are provided. The abrasion powder is absorbed by the permanent magnet 31 or the iron wire layer 33 magnetized by the permanent magnet 31. In addition, the abrasion powder adsorbed on the permanent magnet 31 or the iron wire layer 33 is the gears 13a, 13b, 13
The lubricating oil 34 is not agitated by the rotation of c and 13d and is not separated. Further, the iron wire layer 33 has an effect of adsorbing the abrasion powder and has a great effect of preventing the abrasion powder from being separated by stirring.

Furthermore, the magnetic shield material 32 is a permanent magnet.
The gearbox 11 is prevented from being magnetized by the 31 and the permanent magnet 31
It works to prevent the abrasion powder adsorption effect from being deteriorated.

As described above, according to this embodiment, the malfunction of the operation due to the abrasion powder is eliminated, the failure of the rotary bearing is prevented, and
It is possible to prevent damage to the tooth flanks of the gear, improve the operation stability and reliability of the elevator hoisting device, and provide a safe and trouble-free elevator.

Next, another embodiment of the present invention will be described with reference to FIGS. In FIG. 3, the permanent magnets 31 are provided on the bottom portion 11b of the gear box 11 at predetermined intervals, and the upper surface of the permanent magnets 31 has an iron wire layer 33 in which mesh-like thin iron wires are provided in layers, as in the above-described embodiment. It is provided. Permanent magnet 31 and gearbox
A magnetic shield material 32 is provided between the inner wall surface of 11 and the inner wall surface.

With this structure, a gap with the iron wire layer 33 is formed on the side surface of the permanent magnet 31,
The abrasion powder is also adsorbed in this gap, and the abrasion powder can be prevented from being separated by stirring the lubricating oil. In addition, the surface area of the permanent magnet 31 can be made large, and can be effectively used. Further, as shown in FIG. 4, the same effect can be obtained even if the upper surface side of the permanent magnet 31 is made uneven and the iron wire layer 33 is provided thereon.

[0030]

As described above, according to the present invention, it is possible to provide a safe and low-noise elevator hoisting device without damaging the bearings and gears by the iron powder (wear powder) in the lubricating oil.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an elevator hoisting device of the present invention.

FIG. 2 is a sectional view of the elevator hoisting device of the present invention.

FIG. 3 is an enlarged view of a main part of a hoisting device for an elevator according to another embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of an elevator hoisting device according to another embodiment of the present invention.

FIG. 5 is a schematic view of an entire elevator showing a conventional example.

FIG. 6 is a sectional view of a conventional hoisting device.

FIG. 7 is a cross-sectional view of the conventional winding device.

FIG. 8 is a partially enlarged view of the conventional hoisting device.

FIG. 9 is a side sectional view of the hoisting device of the conventional example.

[Explanation of symbols]

 1 Car 2 Balancing weight 3 Rope 4 Hoisting device 5 Hoisting sheave 6 Electric motor 7 Coupling 8 Reduction gear 9 Output shaft 10 Input shaft 11 Gear box 11a Side 12 Disc brake 13a Gear 13b Gear 13c Gear 13d Gear 14 Bearing 15 Bearing 16 Bearing nut 17 Lid 17a Lid spigot 18 Bearing nut 19 Intermediate shaft 20 Frame 21 Magnet 22 Disc 23 Spring 24 Friction plate 25 Disc 26 Boss 27 Spindle 31 Permanent magnet 32 Magnetic shield material 33 Iron wire layer 34 Lubricating oil

Claims (5)

[Claims] 1. A gear box in which multi-stage gears are provided, and lubricating oil of these gears is injected, an electric motor for driving the gears, an input shaft driven by the electric motors, the input shaft having the gears, and the gear box. A bearing for supporting the input shaft, which is provided on a side portion of the gear box, an electromagnetic disc brake provided outside the gear box for controlling rotation of a friction plate connected to the input shaft, and a bottom portion of the gear box. Elevator hoisting device equipped with a permanent magnet installed in the. 2. The elevator hoisting device according to claim 1, wherein an iron wire layer formed of a mesh-like iron wire is provided on an upper surface of the permanent magnet. 3. The elevator hoisting device according to claim 1, wherein a magnetic shield material is interposed between the permanent magnet and the inner wall of the gear box. 4. The elevator hoisting device according to claim 1, wherein the permanent magnets are provided at predetermined intervals on the bottom of the gear box. 5. The elevator hoisting apparatus according to claim 1, wherein an uneven surface is formed on the permanent magnet, and the permanent magnet is arranged so that the uneven surface is an upper surface. Upper device.