JPH11301954A - Winding machine for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily conduct the load test of a single motor and the replacement of a sheave by providing a specific number of bearings, and making a bearing on the opposite side of the motor to the sheave removable. SOLUTION: Three bearings are provided, and a bearing 31 is made removable. A shaft 6 is supported by the bearings 30, 31 at the time of the load test of a single motor 1. The bearing 31 is removed or loosened after installation, and the shaft 6 is supported by the bearings 20, 30. The shaft 6 is invariably supported by two bearings during the operation of the motor 1, and no offcentering occurs. When a sheave 11 is replaced, the bearing 31 is fitted to support the shaft 6 with the bearings 30, 31 for the replacement work. The bearing 31 can be fitted or removed by screwing bolts into two kinds of hole sections 44, 45 provided on the fitting/removing sections of an outside section 42 and an inside section 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator hoist driven by a motor.

[0002]

2. Description of the Related Art A conventional elevator hoist will be described with reference to FIG. In the figure, 1 is a motor, 2 is a stator core, 3 is a coil, 4 is a rotor, 5 is a permanent magnet, and 6 is a shaft. 10 is a rope wrapped around the sheave 11, 20 and 21 are bearings for supporting the shaft 6, 22
Denotes an oil seal and 23 denotes a hoisting machine stand.

[Problems to be solved by the invention]

In this hoist, a bearing 21 is provided on the motor 1 side.
However, since there is only one, there is a problem that the load test cannot be performed on the motor 1 alone, and even if the sheave 11 needs to be replaced after installation, the replacement operation is very difficult. To solve this problem, the oil seal 22
When a bearing is installed instead of the above, there is a problem that the number of the bearings becomes three, and there is a possibility that the misalignment occurs.

[0004]

According to the present invention, three bearings are provided, one of which is detachable.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram corresponding to FIG.
Reference numeral 30 denotes a bearing, and 31 denotes a detachable bearing. The same reference numerals as those in FIG.

In the hoist of this embodiment, the shaft 6 is supported by the bearings 30 and 31 at the time of a load test using the motor 1 alone. After installation, the bearing 31 is removed or loosened, and the bearings 20 and 30 are removed.
And the shaft 6 is supported. That is, during operation of the motor 1, the shaft 6 is always supported by the two bearings, so that there is no misalignment. Further, when the sheave 11 is replaced, the bearing 31 is attached and the shaft is supported by the bearings 30 and 31, thereby performing the replacement operation.

Next, the structure of the bearing 31 will be described with reference to FIGS. 2 is an enlarged sectional view taken along the line AA of FIG. 1, FIGS. 3 (a) and 3 (b) are partial sectional views taken along the line BB of FIG. 2, and FIGS. 4 (a) and 4 (b).
FIG. 3 is a partial sectional view taken along the line CC of FIG. 2. In the figure, 40 is a bearing, 41 is a detachable portion having an outer portion 42 and an inner portion 43, and 44 and 45 are holes provided at positions where the outer portion 42 and the inner portion 43 are in contact with each other.

[0008] As shown in FIG.
A female screw is cut in the side hole 44a, and this hole 44a is
It is longer than the hole 44b on the inner side 43 side. The inner peripheral surface of the outer portion 42 and the outer peripheral surface of the inner portion 43 are tapered. 46 is a frame of the motor 1. FIG. 3A shows a state in which the bearing 31 is mounted, and FIG.
1 shows a state in which the bearing 31 is separated from the shaft 6.

On the other hand, as shown in FIG. 4, a female thread is formed in the hole 45b on the inner portion 43 side, and the hole 45b is longer than the hole 45a in the outer portion 42. As in FIG. 3, FIG. 4A shows a state in which the bearing 31 is attached, and FIG. 4B shows a state in which the bearing 31 is separated from the shaft 6.

FIGS. 3 (a) and 4 with the bearing 31 attached.
In order to remove the bearing 31 from the state shown in (a), the bolt 50 is screwed into the hole 44. As a result, the outer portion 42 is pulled out as shown in FIG. 3 (b), the shaft 6 and the bearing 40 are separated, and the bearing 31 is separated from the shaft 6. vice versa,
When the bearing 31 is mounted from the state shown in FIGS. 3B and 4B in which the bearing 31 is separated from the shaft 6, when the bolt 50 is screwed into the hole 45, as shown in FIG. The outer portion 42 is pushed into the bearing 31, and the bearing 31 is attached.

As described above, the present embodiment has three bearings, of which the bearing 31 is detachable, so that the load test of the motor 1 alone and the replacement of the sheave 11 can be easily performed. Can be. In the above-described embodiment, the motor 1 is a synchronous machine of a type in which a permanent magnet 5 is provided on a rotor 4, but the present invention is not limited to this. The present invention can be similarly applied to an induction machine.

[0012]

As described above, according to the present invention,
It is possible to provide an elevator hoisting machine that can easily perform a load test with a single motor and replace a sheave.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a partial sectional view taken along line BB of FIG. 2;

FIG. 4 is a partial sectional view taken along the line CC of FIG. 2;

FIG. 5 is a partial sectional view of a conventional elevator hoist.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 6 axis 11 Sheave 20, 21, 30, 31 Bearing 40 Bearing 41 Detachable part

Claims (1)

[Claims] An elevator hoist comprising: a motor; and a sheave coupled to the motor by a shaft. The elevator hoist receives the shaft by bearings on a side opposite to the motor of the sheave, and on a side of the motor opposite to the sheave. 3. The elevator hoist according to claim 1, wherein a bearing on the side opposite to the sheave of the motor is detachable.