JP2001151443A - Winder and elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winder requiring a less number of parts and a less number of assembling processes and having a further lower profile in the axial direction. SOLUTION: In the winder 28, a rotor 37 of a motor has a rotor base 29 having an integrated rotational shaft 38 and serving a sheave, an annular rotor iron core 39 provided on the rotor base 29 so as to encircle a stator 33 and a plural-pole permanent magnet 40 embedded in the rotor iron core 39. The rotor iron core 39 is formed with a number of silicon steel plates 42 laminated. In this construction with the rotor base 29 serving the sheave, need for a sheave as separate parts of the rotor is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoisting device used for an elevator device and an elevator device provided with the hoisting device.

[0002]

FIG. 9 shows the configuration of a conventional general elevator apparatus. In FIG. 9, a machine room 2 is provided near the top of the hoistway 1, and a hoisting device 3 is provided on a base 2 a provided in the machine room 2. The hoisting device 3 includes an electric motor 4 and a sheave 6 rotated by the electric motor 4 via a gear mechanism 5. A plurality of ropes 7 are hung on the sheave 6, a car 8 is connected to one end of the rope 7, and a counterweight 9a is connected to the other end.
Is connected. In this configuration, the sheave 6 is driven by the electric motor 4 through the gear mechanism 5.
Is rotated, the car 8 and the weight mounting portion 9 are moved up and down via the rope 7.

In the above-described conventional configuration, the gear mechanism 5 is required between the electric motor 4 and the sheave 6, so that the hoisting device 3 becomes large and has a disadvantage that a large installation space is required.

On the other hand, in recent years, as a hoisting device used in such an elevator device, a so-called gearless type which does not use a gear mechanism has been considered. FIG. 1 shows an example of a rotor of an electric motor in such a hoisting apparatus.
0 is shown. FIG. 10 shows a procedure for assembling the rotor 10. As shown in FIG. 10 (c), the rotor 10 has a rotor base 11 (only a part is shown in the figure) in the shape of a shallow container with a left side opening in the figure, and a large number of silicon elements. An annular rotor core 13 which is formed by laminating steel plates 12 and is fixedly attached to the inner surface of the rotor base 11, and a plurality of poles embedded by being inserted into magnet insertion holes 13 a formed in the rotor core 13. The rotor core 13 is of an abduction type in which the inner peripheral surface of the rotor core 13 is opposed to the outer peripheral surface of a stator (not shown).

In this case, as shown in FIG. 1A, the rotor 10 is formed by laminating a number of silicon steel sheets 12 punched by a punching process, and collectively using a caulking screw 15 to form a rotor core 13 ( (B)). Thereafter, as shown in (b), the rotor core 13 is mounted and fixed to the inner surface of the rotor base 11 by mounting screws 16,
Then, as shown in (c), each permanent magnet 14 is inserted into each magnet insertion hole 13a of the rotor core 13.

In such a configuration, each permanent magnet 1
4 is embedded in the rotor core 13, the rotor core 13 has a portion 13b located between each permanent magnet 14 and the stator. Due to the presence of the portion 13b, a larger torque can be obtained as compared with the case where the permanent magnet is exposed on the inner peripheral surface of the rotor core. As a result, the motor can be made thinner, and the installation space can be further reduced.

However, in the above-described configuration,
The sheave rotated by the rotor 10 is
It is needed separately. For this reason, there are disadvantages that the number of parts is increased and the number of assembling steps is increased accordingly.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to reduce the number of parts, reduce the number of assembling steps, reduce costs, and further reduce the thickness in the axial direction. A second object of the present invention is to provide a hoisting device that can be formed into a shape, and a second object of the present invention is to provide an elevator device that can reduce the cost and reduce the installation space of the hoisting device.

[0009]

In order to achieve the above-mentioned first object, the invention according to claim 1 comprises a stator for an electric motor,
An external rotation type rotor of an electric motor provided rotatably with respect to the stator, wherein the rotor has a rotor base also serving as a sheave on which a rope is hung on an outer peripheral portion, and the rotor base has The rotor core provided in a state surrounding the stator, and a plurality of permanent magnets embedded in the rotor core so as to surround the stator are provided. Things.

According to this structure, since the rotor base also serves as the sheave, the sheave is not required as a separate component of the rotor. Therefore, the number of parts can be reduced, the number of assembling steps can be reduced, the cost can be reduced, and the thickness can be further reduced in the axial direction as compared with the case where the sheave is required as a separate part from the rotor. it can.

In this case, it is preferable that the rotor core is formed by laminating a plurality of silicon steel plates (the second aspect of the present invention). Further, as in the third aspect of the invention, the rotor core may be formed by casting cast iron or powdered iron. According to this, there is an advantage that it is not necessary to stack silicon steel sheets when assembling. Claim 4
The invention of claim 2 is characterized in that, in the invention of claim 2, a plurality of silicon steel plates of the rotor core are directly laminated and fixed on the rotor base. According to this, it is not necessary to laminate silicon steel sheets in advance.

According to a fifth aspect of the present invention, in order to achieve the above-mentioned second object, the rope is supported by the rope so as to be vertically movable along a first guide rail via a pulley, and the rope is mounted on the rope. A weight mounting portion having a counterweight supported vertically movably along the second guide rail, and a hoisting device according to any one of claims 1 to 4 are provided. According to this, since the cost of the hoisting device can be reduced, the cost of the elevator device can also be reduced, and since the hoisting device can be made thin, the installation space of the hoisting device can be reduced. Claim 6
The invention according to claim 5 is characterized in that, in the invention according to claim 5, a hoisting device is installed on the weight mounting portion. According to this, a dedicated machine room becomes unnecessary, and the weight of the hoisting device acts as a weight, so that the amount of the counterweight in the weight mounting portion can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, in FIG. 2 showing a schematic configuration of an elevator apparatus, a car 21
Moves up and down along the first guide rail 22 of the hoistway, and the weight mounting portion 23 to which the counterweight 23a is mounted moves up and down along the second guide rail 24 of the hoistway. . The rope 25 has one end 25a.
Are fixed near the top of the guide rail 22 for the car 21, the other end 25b is fixed near the top of the second guide rail 24 for the weight mounting portion 23, and the middle portion is It is hooked on an intermediate pulley 26 installed near the top of the first guide rail 22 and the second guide rail 24.

The car 21 includes an intermediate pulley 26 and a rope 2.
5 and is supported by the rope 25 so as to be able to move up and down via a pair of moving pulleys 27 and 27. The weight mounting portion 23 is located between the intermediate pulley 26 and the other end 25b of the rope 25,
5, a rotor base 29 (FIG. 1, FIG.
3 and FIG. 4). The hoisting device 28 is mounted on the frame 3 of the weight mounting portion 23.
0.

Next, the hoisting device 28 will be described mainly with reference to FIG. At the center of the base plate 31 of the hoisting device 28, a circular hole 31a is formed, and here,
A cylindrical sleeve 32 is provided in a fixed state so as to protrude rightward in FIG. A motor stator 33 is provided on the outer periphery of the sleeve 32. The stator 33 includes a stator core 34 having a plurality of slots, and a plurality of stator coils 3 wound around the stator core 34.
And 5.

A rotary shaft 38 of a rotor 37 of the electric motor is rotatably inserted into the inner peripheral portion of the sleeve 32 via bearings 36, 36 formed of ball bearings. The rotor 37 has a rotating shaft 38, a disk-shaped rotor base 29 integrally formed with the rotating shaft 38, and an end face of an annular convex portion 29 a formed on the rotor base 29. And a plurality of permanent magnets 40 having a plurality of poles embedded in the rotor core 39 so as to surround the stator 33. The inner peripheral surface of the rotor core 39 faces the outer peripheral surface of the stator core 34 with a predetermined gap.

Here, a plurality of grooves 41 on which the ropes 25 are hung are formed on the outer peripheral portion of the rotor base 29, and the rotor base 29 has a structure also serving as a sheave. The rotor core 39 is formed by laminating a large number of silicon steel plates 42, and is fixed to the rotor base 29 as shown in FIG. That is, first, as shown in (a), a large number of silicon steel plates 42 punched by a punching process are laminated, and caulking screws 43
Collectively constitute the rotor core 39 (see (b)). Thereafter, as shown in FIG.
Is attached to the annular convex portion 29 of the rotor base 29 by the mounting screw 44.
a. Then, as shown in (c), each permanent magnet 40 is embedded by inserting it into each magnet insertion hole 39a formed in the rotor core 39. In FIG. 1, a bearing retainer 45 for supporting the inner ring of the bearing 36 is provided at an axial end of the rotating shaft 38.

As shown in FIGS. 2 to 4, the hoisting device 28 constructed as described above is accommodated in the unit case 46 provided on the frame 30 of the weight mounting portion 23, and It is installed in. In this case, the base plate 31 of the hoisting device 28 is
, And a rope 25 is hung around the outer periphery of a rotor base 29 also serving as a sheave.

In the above configuration, the car 21 moves up and down along the first guide rail 22 through the rope 25 based on the rotation of the rotor 37 in accordance with the energization of the stator coil 35 of the hoisting device 28. At the same time, the weight mounting portion 23 is moved up and down along the second guide rail 24.

According to the first embodiment, the following effects can be obtained. That is, since the rotor base 29 of the hoisting device 28 also functions as a sheave on which the rope 25 is hung, the sheave is not required as another component of the rotor. Therefore, the number of parts can be reduced, the number of assembling steps can be reduced, and the cost can be reduced as compared with the case where the sheave is required as a separate part from the rotor. In addition, since the thickness can be further reduced in the axial direction, the installation space for the hoisting device 28 can be reduced.

Further, in the elevator device, the cost of the hoisting device 28 can be reduced, so that the cost of the elevator device can be reduced, and since the hoisting device 28 can be made thin, the installation space of the hoisting device 28 can be reduced. it can. Moreover, since the hoisting device 28 is installed on the weight mounting part 23, there is no need to provide a machine room near the top of the hoistway, and the weight of the hoisting device 28 acts as a weight. There is also an advantage that the amount of the counterweight 23a in the weight mounting portion 23 can be reduced.

FIGS. 6 and 7 show a second embodiment of the present invention. The second embodiment differs from the first embodiment in the following points. That is, the rotor 3 of the electric motor
7, the bottom 50a is thinner than the rotor base 29 of the first embodiment, and the annular wall 50b is formed to have a larger protrusion amount, and is formed in a shallow bottom container shape. Have been. Groove 41 on which rope 25 is hung
Is formed at the outer peripheral portion of the rotor base 50 at the annular wall portion 50.
It is also formed on the outer periphery of b. An annular rotor core 51 formed by laminating a number of silicon steel plates 42 is mounted and fixed on the inner surface side of the rotor base 50, and the plural-pole permanent magnet 40 is embedded in the rotor core 51. I have.

In this case, the rotor core 51 and the permanent magnet 4
0 is attached to the rotor base 50 as shown in FIG. That is, first, as shown in (a), a large number of silicon steel sheets 42 punched by
It is directly laminated on the inner surface of the rotor base 50 and is fixed to the rotor base 50 with the mounting screws 44 (see (b)). As a result, the rotor core 51 is attached and fixed to the rotor base 50. Thereafter, as shown in (b) and (c), each permanent magnet 40 is embedded by inserting it into each magnet insertion hole 51a of the rotor core 51.

According to the second embodiment, a number of silicon steel plates 42 of the rotor core 51 are connected to the rotor base 50.
Since a large number of silicon steel plates 42 need not be stacked in advance with caulking screws, the number of assembling steps can be reduced accordingly.

FIG. 8 shows a third embodiment of the present invention. The third embodiment differs from the first embodiment in the following points. That is, the rotor core 52 of the rotor 37 is not formed by laminating a large number of silicon steel plates, but is formed by, for example, casting cast iron. It is fixed to the end face. The permanent magnets 40 are inserted and embedded in the magnet insertion holes of the rotor core 52.

According to the third embodiment, the rotor core 52
, It is not necessary to laminate a large number of silicon steel sheets, and there is an advantage that the number of assembling steps can be reduced accordingly. In this case, the rotor core 5
2 can also be constituted by what was cast using powder iron instead of cast iron.

The present invention is not limited to the above-described embodiments. For example, the rotating shaft 3 of the rotor 37
The rotor 8 and the rotor bases 29 and 50 are not integrally formed, but may be constituted by separate members.

[0028]

As is clear from the above description, according to the hoisting device of the present invention, since the rotor base also serves as the sheave, the number of parts can be reduced, the number of assembling steps can be reduced, and the cost can be reduced. Can be reduced, and the thickness can be further reduced in the axial direction.

According to the elevator apparatus of the present invention,
Since the cost of the hoisting device can be reduced, the cost of the elevator device can also be reduced, and since the hoisting device can be made thin, the installation space for the hoisting device can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a hoisting device showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration of an elevator apparatus.

FIG. 3 is a front view of a weight mounting portion.

FIG. 4 is a sectional view taken along line XX in FIG.

5 (a) to 5 (c) are cross-sectional views showing a procedure for assembling a rotor.

FIG. 6 is a view corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 7 is a diagram corresponding to FIG. 5;

FIG. 8 is a view corresponding to FIG. 1, showing a third embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 2 of a conventional example.

FIG. 10 is a diagram corresponding to FIG. 5;

[Description of Signs] 21 is a car, 22 is a first guide rail, 23 is a weight mounting portion, 23a is a counterweight, 24 is a second guide rail, 25 is a rope, 26 is an intermediate pulley, and 27 is a moving pulley ( Pulley), 28 is a hoisting device, 29 is a rotor base (sheave), 33 is a stator, 37 is a rotor, 38 is a rotating shaft, 39 is a rotor core, 40 is a permanent magnet, 41 is a groove,
2 is a silicon steel plate, 46 is a unit case, 50 is a rotor base, 51 is a rotor core, and 52 is a rotor core.

Continued on the front page (72) Inventor Masato Nagata 33rd Shinisogo-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture F-term in the Toshiba Production Technology Center (Reference) 3F306 AA07 BA07 BB01 5H607 AA12 BB01 BB14 BB17 CC01 CC03 CC05 DD01 DD02 DD16 DD17 EE28 FF01 GG08

Claims (6)

[Claims] 1. An electric motor, comprising: a stator of an electric motor; and an external rotation type rotor of the electric motor rotatably provided with respect to the stator, wherein the rotor also functions as a sheave on which a rope is hung on an outer peripheral portion. A rotor base, a rotor core provided on the rotor base so as to surround the stator, and a plurality of permanent magnets embedded in the rotor core so as to surround the stator. And a hoisting device comprising: 2. The hoisting device according to claim 1, wherein the rotor core is formed by stacking a plurality of silicon steel plates. 3. The hoisting device according to claim 1, wherein the rotor core is formed by casting cast iron or powdered iron. 4. The hoisting device according to claim 2, wherein the plurality of silicon steel plates of the rotor core are directly laminated and fixed to the rotor base. 5. A vehicle which is vertically movably supported along a first guide rail via a pulley with respect to a rope, and which is vertically movably supported along a second guide rail with respect to the rope. An elevator apparatus comprising: a weight mounting portion having a counterweight; and the hoisting device according to claim 1. 6. The elevator device according to claim 5, wherein a hoisting device is installed at the weight mounting portion.