JPH1118366A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin type hoist whose motor diameter is small and whose brake is compact, by incorporating a reduction gear into a thin motor and forming them integrally. SOLUTION: A field generating means 1A is formed integrally with the inner periphery surface of a rotor 2, and formed integrally with a cylindrical stator 5 at the outer peripheral surface. A motor is constituted of a field generating means 1B which is made to serve as a pair with the field generating means. A permanent magnet may be fixed on either of the rotor 2 or the stator. The rotor is formed integrally or fitted with/onto a rotor shaft 4, and a brake 5 and a center gear 6 are fitted on a coaxial axis to the rotor shaft. An inner tooth 7 is formed at the inner periphery surface of the stator, and an epicyclic gear device is constituted of a planet gear 8 which engages with both of the inner tooth 7 and the center gear 6, and a carrier 9 which rotatably supports the planet gear 8. It is thus possible to facilitate the control of a thin hoist and decrease the diameter of the motor for formation of a compact brake 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoist for an elevator system, and more particularly to a method for constructing a hoist suitable for reducing the installation area of the hoist.

[0002]

2. Description of the Related Art In elevator hoists, it is desired to greatly reduce the size of the hoist in order to cope with a narrow installation space. In particular, there is a strong demand for a so-called thin hoist having a reduced axial dimension, and is disclosed in JP-A-8-37764.
As described in Japanese Unexamined Patent Application Publication, a linear motor hoist using a thin motor using a permanent magnet has been developed.

[0003]

However, in the above-mentioned thin hoist, since the traction sheave is directly driven by the motor, the motor becomes a low-speed and large-torque motor, and there is a problem that the motor diameter increases and the brake capacity increases. Has occurred.

[0004]

According to the present invention, the above-mentioned object is achieved by driving a traction sheave by a motor through a gear reducer. That is, by incorporating a gear reducer inside the thin motor and integrally forming it, the motor is made to be a high-speed and low-torque type, and without losing the advantage of the thin motor having a small axial dimension, the motor body and the brake can be formed. Provide an elevator hoist with a small size and a small installation area. Further, in the present invention, compared with a linear motion hoist using a permanent magnet, the amount of expensive magnetic material used is reduced, and the attractive force of the driving permanent magnet is reduced, thereby reducing costs and facilitating assembly. Provide a simple elevator hoist.

That is, according to the present invention, a thin hoist having a small motor diameter and a compact brake is provided.
Further, according to the present invention, there is provided a low-profile hoist which is low-cost and easy to assemble.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 1 shows a first embodiment of an elevator hoist according to the present invention. The magnetic field generating means 1A is formed integrally with the inner peripheral surface of the rotor 2, and has a cylindrical stator 3;
The electric motor is constituted by the magnetic field generating means 1B integrally formed on the outer peripheral surface and paired with the magnetic field generating means. As the magnetic field generating means, it is preferable to use a permanent magnet, a coil and an iron core. The permanent magnet may be fixed to either the rotor or the stator. The rotor is integrated with or fitted to the rotor shaft 4, and a brake 5 and a sun gear 6 are provided coaxially with the rotor shaft.
Internal teeth 7 are formed on the inner peripheral surface of the stator, and a planetary gear 8 meshing with both the internal teeth and the sun gear, and a carrier 9 that rotatably supports the planetary gears, constitute a planetary gear device. ing. The carriers are bearings 10A and 10A.
The sheave shaft 11 is connected to a sheave shaft 11 rotatably supported by B, and the sheave shaft is fitted to the sheave 12. The bearings 10A and 10B are supported by a base 13, which together with the lower motor case 14A and the upper motor case 14B constitute a motor case.

[0007] When a direct-acting hoist is constructed using a permanent magnet motor, the diameter of the motor generally exceeds the sheave diameter because of the necessity of a low-speed, large-torque motor. However, according to the present invention, the motor may be of high speed and low torque, so that the motor diameter can be reduced. Further, since the braking is performed by the brake provided coaxially with the rotor shaft of the electric motor, the braking torque is small and the brake is compact. Furthermore, in the planetary gear set connected to the rotor shaft, the gear box is further covered with a motor case,
The gear meshing noise is extremely low. In addition, since the required amount of expensive magnetic material is smaller than that of the direct acting type, the manufacturing cost is low and the attractive force of the permanent magnet is small.
Assembling becomes easy.

(Embodiment 2) FIG. 2 shows a second embodiment of the elevator hoist according to the present invention. The magnetic field generating means 1A is integrally formed on the outer peripheral surface of the rotor 2, and the magnetic field generating means 1B paired with the magnetic field generating means is
Are formed integrally with the inner peripheral surface of the. Here, the magnetic field generating means 1A and 1B may be formed in a plurality of rows in the rotor axis direction. Other configurations are common to the first embodiment.
Description is omitted.

In this embodiment, since the magnetic field generating means is formed on the outer peripheral surface of the rotor and the inner peripheral surface of the stator, the installation area of the magnetic field generating means and the distance from the axis center are larger and larger than in the first embodiment. It can generate torque.

(Embodiment 3) FIG. 3 shows a third embodiment of the elevator hoist according to the present invention. The rotor 2 is integrally formed with or fitted to the rotor shaft 4. On the rotor, a magnetic field generating means 1A is integrally formed at a position where a magnetic field for rotating the rotor can be generated in the axial direction of the rotor. I have. The magnetic field generating means 1B, which is paired with the magnetic field generating means, is formed integrally on the stator 15 also serving as a motor case, and constitutes a motor together with the rotor. When the magnetic field generating means is arranged in this way, the space defined by the gap between the magnetic field generating means 1A and 1B is present in a plane perpendicular to the axis of the rotor. Brake 5, planetary gear units 6, 7, 8, 9, bearings 10A, 10B, sheave shaft 11,
Since the configurations of the sheave 12 and the base 13 are the same as those of the first embodiment, the description is omitted. The outer peripheral portion 18 of the planetary gear unit forms a gear box together with the base.

In this embodiment, the magnetic field generating means is arranged to generate a magnetic field in the axial direction of the rotor. Since the gear box is integrated with the base, the structure of the hoist is greatly simplified. The manufacturing cost and the assembly process can be reduced.

(Embodiment 4) FIG. 4 shows a fourth embodiment of the elevator hoist according to the present invention. The rotor shaft 4 of the electric motor having the same configuration as that of the third embodiment is provided with a small gear 16A instead of the sun gear, and the large gear 1 meshing with the small gear.
6B together with the helical gear device. The large gear is connected to a sheave shaft 11 rotatably supported by bearings 10A and 10B, and the sheave shaft is fitted with a sheave 12. The bearings 10A and 10B are supported by a base 13, which is a lower case of a gearbox.
A gear box is constituted together with 17A and the upper case 17B.

In this embodiment, the output from the electric motor is reduced by the helical gear device. Since the helical gear device can set a relatively large torsion angle as compared with the planetary gear device, the generated vibration noise is very small. Further, since the number of gears per hoisting machine is also reduced, the manufacturing cost can be reduced and the assembling process can be shortened.

[0014]

According to the present invention, by arranging a gear unit inside a thin motor or attached to the motor, the control is simple, the motor diameter is small, and the brake is compact. Is provided. Further, according to the present invention, a low cost and easy to assemble thin hoist is provided by reducing the fee for using expensive magnetic materials.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment.

FIG. 2 is a side view of the second embodiment.

FIG. 3 is a side view of a third embodiment.

FIG. 4 is a side view of a fourth embodiment.

[Explanation of symbols]

1A, 1B: magnetic field generating means, 2: rotor, 3: stator, 4: rotor shaft, 5: brake, 6: sun gear, 7 ...
Internal teeth, 8: Planetary gear, 9: Carrier, 10A, 10B ...
Bearing, 11 ... sheave shaft, 12 ... sheave, 13 ... base,
14A, 14B: electric motor case, 15: stator, 16
A: small gear, 16B: large gear, 17A, 17B, 18 ...
Gear box.

Claims (7)

[Claims] An elevator hoist including a traction sheave, a sheave shaft, a gear device, and an electric motor.
An elevator wherein the magnetic field generating means of the electric motor is arranged along the outer periphery of the gear device. 2. An elevator hoist equipped with a traction sheave, a sheave shaft, a gear device, and an electric motor,
An elevator, wherein the gear device is disposed inside a rotor of the electric motor. 3. An elevator hoist including a traction sheave, a sheave shaft, a gear device, and an electric motor,
An elevator, wherein a main component of a magnetic field for driving a rotor is generated in a rotor axial direction by a magnetic field generating means of an electric motor. 4. An elevator hoist comprising a traction sheave, a sheave shaft, a gear device, and an electric motor.
An elevator characterized in that a space defined by a gap between a rotor-side magnetic field generating means of a motor and a stator-side magnetic field generating means is in a plane perpendicular to the axis of the rotor. 5. An elevator hoist comprising a traction sheave, a sheave shaft, a gear device, and an electric motor,
An elevator, wherein the motor is a synchronous motor using a permanent magnet. 6. An elevator hoist driven by a permanent magnet motor, comprising an epicyclic gear device. 7. An elevator hoist driven by a permanent magnet motor, comprising a helical gear device.