JPS6279193A - Winding machine for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an elevator hoist, and more particularly to an elevator hoist using an AC motor.

[Technical background of the invention and its problems] In recent years, as an electric motor for gearless elevator hoisting machines,
It has been proposed to use an AC motor in place of the conventionally used DC motor.

An elevator hoist using such an AC motor will be explained with reference to FIG.

As shown in the figure, bearing stands 2.
3 is arranged, and an AC electric motor 4 is installed between the bearing stands 2 and 3.

A sheave 6 is inserted and attached to the rotating shaft 5 of the AC motor 4, and both ends of the sheave 6 are rotatably supported by bearing stands 2.3. Rotation l! A stator 8 made of a laminated iron core is concentrically arranged around the 1I15 rotor 7. The stator 8 is sandwiched between core holders 9.10 from both sides, and is fixed by tightening the core holders 9.10 with bolts and nuts 11. Iron core presser 9.10
The lower part is bent outward in an angular shape,
The bent portions 9a, 10a are fixed to the machine base 1 with bolts or the like.

In the elevator hoist constructed as described above, the stator 8 is held between the core holders 9.10 and the core holders 9.10 are fixed to the machine base 1. , only its own weight and rotational reaction force act, and the frame used in DC motors can be omitted. Therefore, it is possible to significantly reduce the weight, making the installation work of the hoist extremely easy, and since the frame is omitted, the cooling effect can be expected to be improved, among other benefits.

By the way, in the elevator hoist constructed in this way, the bearing stands 2.3 are arranged on both sides of the AC motor 4 on the machine stand 1, and the stator 8 is sandwiched between the core holders 9.10. Since the core retainer 9.10 was fixed to the machine base 1, there was a problem in that it was difficult to align the centers of the rotor 7 with the bearing stands 2.3 on both sides and the stator 8.

[Object of the Invention] The present invention has been made to solve such conventional problems, and it is possible to easily align the centers of the rotor, the bearing, and the stator, and to achieve a significant weight reduction. The purpose of this invention is to provide an elevator hoisting machine that can

[Summary of the Invention] That is, the elevator hoisting machine of the present invention has a rotor fixed to the outer periphery of a rotating shaft, a stator made of a laminated iron core arranged around the outer periphery of the rotor, and a sheave mounted on the rotating shaft. In an elevator hoisting machine in which the two ends are fitted together and supported by a bearing mechanism fixed to the machine base, each thin steel plate constituting the laminated core has a leg part formed integrally with the field part. By configuring a laminated core with legs and fixing the legs of this laminated core to the machine stand to support the stator load, it is easy to align the centers of the rotor, bearings, and stator. This makes it possible to carry out a large amount of weight, and furthermore, it is possible to achieve a significant weight reduction.

[Embodiments of the invention] Embodiments of the present invention will be described below based on the drawings.

1 and 2 show an elevator hoisting machine according to an embodiment of the present invention, in which a rotating shaft 23 around which a rotor 22 is fixed is disposed on a machine base 21; A sheave 24 is inserted and attached to this rotating shaft 23. Moreover, a laminated iron core 25 having leg portions 25A in which protruding portions 25a are formed is concentrically arranged around the outer periphery of the rotor 22.

On both sides of the laminated core 25, core holders 26a and 26b formed in an annular shape are arranged, and support plates 27 of the number of tanks are arranged around the outer periphery of the laminated core 25, and the support plates 27 and the core holders on both sides are arranged. The stator 28 is constructed by fixing the parts 26a and 26b together by welding or the like. Further, a fixing plate 29 is fixed by welding or the like on the protruding part 25a of the leg part 25A of the laminated core 25, and a through hole (not shown) is bored through the fixing plate 29 and the protruding part 25a. An AC motor 31 is configured by being fixed to the machine base 21 with bolts 30.

In addition, bearings 3 are mounted on the machine base 21 on both sides of the AC electric motor R31.
2.32 is fixed, and both ends of the rotating shaft 23 of the AC motor 31 are attached to the bearings 32.
It is rotatably supported by.

Furthermore, as shown in FIG.
The leg portion 34B is extended with a diameter of and has a protruding portion 34b formed therein.
It is constructed by laminating thin steel plates 34 integrally formed with and pressurizing them.

In this embodiment, the stator 28 is constructed by providing the laminated core 25 with the leg portions 25A on which the protrusions 25a are formed, and the protrusions 25a of the laminated core 25 are fixed to the machine base 21 via the fixing plate 29. , it is possible to easily align the centers of the rotor 22, the bearing 32, and the stator 28.

Furthermore, by omitting the bending part for attachment that was formed on the conventional iron core holder, the weight of the hoist can be significantly reduced.

FIG. 4 shows an elevator hoist according to another embodiment of the present invention. In this embodiment, the laminated core 35 of the stator 28 is
However, a thin steel plate 37 integrally formed from an annular field part 36A and a leg part 36B which is extended by the diameter of the field part 36A and has a mouth-shaped notch 36b is laminated and pressurized. As a result, opening-shaped recesses 35a are formed on both sides of the lower portion of the laminated core 25. Laminated core 35
The fixing plates 29 are fixed to the concave portions 35a by welding, and the laminated iron core 35 is fixed to the two fixing plates and the concave portions 35a by welding.
A through hole (not shown) is formed through the lower end of a and is fixed to the machine stand 21 with a bolt 30.

In this embodiment, a recess 35a is formed in the laminated core 35,
Since this recess 35a is fixed to the machine base 21 via the fixing plate 29, the rotor 22 and the bearing 3
2 and the stator 28 can be easily aligned.

Further, since the width of the machine base 21 is made almost the same as the diameter of the laminated core 35, it is possible to downsize and reduce the weight of the hoist, and the installation work of the hoist can be easily performed.

FIG. 5 shows still another embodiment of the present invention, in which the laminated core 45 of the stator 28 has an annular field section 46A and is extended by the diameter of the field section 46A. Thin steel plates 47 integrally formed with the leg portions 46B are laminated and pressurized. Legs 46 of this laminated core 45
L-shaped members 48 are fixed to both sides of B by welding, and a through hole (not shown) passing through the L-shaped members 48 is formed and fixed to the machine base 21 with bolts 30.

In this embodiment, the laminated core 45 of the stator 28 is composed of a thin steel plate 47 formed from a field part 46Δ and a leg part 46B extended by the diameter of the field part 46A.
Since the L-shaped members 48 are welded on both sides of the lower part and the L-shaped member 4B is fixed to the machine base 21, the centers of the rotor 22, the bearing 32, and the stator 28 are aligned, as in the embodiment shown in FIG. You can easily perform tasks that you avoid. Also,
By using the L-shaped member 48, the structure of the stator 28 is simplified and its assembly work can be easily performed.

[Effects of the Invention] As explained above, the elevator hoisting machine of the present invention has a laminated core having leg parts formed by forming leg parts integrally with the field part of each thin steel plate constituting the laminated core. However, since the legs of this laminated core are fixed to the machine base, it is easy to align the centers of the rotor, bearing, and stator, and the weight of the hoist can be significantly reduced. I can do it.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view showing an elevator hoist according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line m-■ in Fig. 1, and Fig. 3 is an implementation of Fig. 1. FIG. 4 is a sectional view showing an elevator hoist according to another embodiment of the present invention, and FIG. 5 is a front view showing a thin steel plate of a laminated iron core used in the example. FIG. 6 is a sectional view showing a conventional elevator hoist. FIG. 6 is a partially sectional side view showing a conventional elevator hoist. 21... Machine base 22... Rotor 23... Rotating shaft 24... Sheave 25. ......Laminated core 25A...Legs 28...Stator 34...Thin steel plate 34A... Field part 34B...Leg part Applicant: Toshiba Corporation Patent attorney Satoshi Suyama - Figure 2, Figure 3, Figure 4

Claims (1)

[Claims] (1) A rotor is fixed to the outer periphery of the rotating shaft, a stator made of a laminated iron core is arranged around the outer periphery of the rotor, and a sheave is fitted to the rotating shaft and both ends are fixed to the machine base. In an elevator hoist supported by a bearing mechanism,
A leg portion is formed integrally with the field portion of each thin steel plate constituting the laminated core to constitute a laminated core having a leg portion, and the leg portion of the laminated core is fixed to the machine base to form a stator. An elevator hoist characterized by supporting a load.