JP2642361B2 - Method of manufacturing elevator hoist - Google Patents

Description

The present invention relates to an elevator hoist, and more particularly to a hoist for a gearless elevator using an AC motor.

(Prior Art) In general, elevator hoists using an AC motor as an electric motor are known. FIG. 7 shows a conventional elevator hoist of this type. Reference numeral 1 indicates a machine base,
A bearing base 2 and a bearing bracket 3 are provided on the machine base 1, and a shaft 5 is rotatably supported on the base 1 via bearings 4, 4. On this shaft 5, a rotor 6 and a sheave 7 are straightened, and on the sheave 7, a wire rope 9 for suspending an elevating body 8 is provided.
And a brake 10 for stopping the rotation of the sheave 7 is wound. In addition, a stator indicated by reference numeral 11 is disposed around the rotor 6. The stator 11 sandwiches the electric iron plates 15, 15,... 15 between the first and second iron core holding plates 12, 13 whose lower ends are fixed to the machine base 1, and then sandwiches the iron core plates 15, 15,. 13 as shown in Figure 8,
It is configured by welding with a plurality of ribs 16.

FIGS. 9 to 9 show a conventional method of assembling a stator 11 of this kind.
As shown in FIG. 11, an electric iron plate 15 is laminated so that the outer periphery thereof is aligned with the step 12a of the first iron holding plate 12, and this is made into a laminated iron core. Then, the second iron holding plate 13 is overlaid, and Pressing is performed in the direction of arrow f by a press, and the rib 16 is welded in this state. Welding is performed by the rib 16 and the outer peripheral surface of the iron plate 15, the rib 16 and the iron core holding plate 12,
13 and between the iron core presser plates 12 and 13 and the outer peripheral surface of the iron plate 15. Next, as is clear from FIG. 7, the annular alignment surface B with the bearing bracket 3 and the mounting surface C of the lower surface of the iron core holding plates 12 and 13 to the machine base 1 are machined. It is installed on the machine base 1.

(Problems to be Solved by the Invention) Generally, a welded article is annealed after welding, and after sufficiently removing distortion, machining is performed. However, if annealing is performed after welding and assembling the stator 11 as described above, the insulating film formed on the surface of the electric iron plate 15 is damaged, and thus the stator 11 is annealed in the conventional manufacturing method. There is a problem that you can not. Therefore, in this type of stator 11, it is necessary to assemble while suppressing distortion with a small amount of welding, and thereafter to machine without annealing. There is a problem that a welded portion cannot be sufficiently welded.

In the elevator hoisting machine, the suspended load of the elevating body 8 must be supported by the stator 11 and the bearing base 2, and the gap between the inner periphery of the stator 11 and the rotor 6 is accurately determined. Since the stator 11 must be maintained, the stator 11 must have strong rigidity, and an alternating current including a high frequency is supplied as a driving power source by an inverter, so that the vibration resistance of the elevator hoist must be improved. , In this sense, the stator
11 requires strong rigidity.

In particular, in a large-capacity, ultra-high-speed elevator hoisting machine attached to a recent skyscraper, it is essential that the rigidity of the stator 11 be increased and sufficient vibration resistance be provided.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional technology, minimize welding distortion, increase the rigidity of the stator, and apply the present invention to a large-capacity ultra-high-speed elevator. An object of the present invention is to provide a hoist.

[Configuration of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention relates to a sheave and a rotor for an electric motor that rotationally drives the rotating shaft on a rotating shaft supported on a machine base via a bearing stand. A method of manufacturing an elevator hoisting machine, wherein the stator of the electric motor is fixed on the machine base, and wherein the stator is provided with a first core holding plate and a second core having an insertion hole. After the holding plate and the upper and lower reinforcing plates are welded to form a frame, the frame is annealed to remove welding distortion, and then a plurality of electric iron plates are inserted through the insertion holes of the second core holding plate. Inserting and laminating in the frame sequentially,
Further, a lid plate for closing the insertion hole applied to the laminated electric iron plate is formed by pressing the lid plate in a direction in which the electric iron plates are laminated and welding the lid plate to the second iron core holding plate. It is.

(Operation) According to the present invention, a frame is formed in advance by the first and second core holding plates and the upper and lower reinforcing plates, and the frame is annealed to remove welding distortion, and thereafter, the frame is formed. An electric iron plate is inserted and laminated, and then the lid is addressed to the insertion hole and pressurized from above, and the lid and the second iron core holding plate are welded to form a stator. It becomes strong by proper welding.

(Embodiment) Hereinafter, an embodiment of an elevator hoist according to the present invention will be described with reference to FIGS. 1 to 6 in which the same parts as those in FIG.

In FIG. 1, reference numeral 1 denotes a machine base, on which a bearing base 2 and a bearing bracket 3 are disposed, on which a shaft 5 is rotatably supported via bearings 4, 4. Have been. A rotor 6 and a sheave 7 are mounted on the shaft 5, and a wire rope 9 and a sheave 7 for suspending an elevating body 8 are mounted on the sheave 7.
A brake 10 for stopping the rotation of the vehicle is wound.

In addition, a stator indicated by reference numeral 11 is disposed around the rotor 6. The stator 11 includes a first iron holding plate.
A plurality of electric iron plates 15 are laminated and sandwiched between 12 and the second core holding plate 13, and the iron core holding plates 12, 13 are formed by welding upper and lower reinforcing plates 18, 19.

2 to 5 show a state before and after assembling the stator 11 according to the present embodiment. FIGS. 2, 4, and 5 show side views, and FIG. 3 shows a front view. .

The first core holding plate 12 has an inner surface formed with a stepped portion 12a similar to the conventional one, and the second core holding plate 13 has an insertion hole 29 slightly larger than the outer diameter of the electric iron plate 15. . These first iron core holding plate 12 and second iron core holding plate 13
Before the electric iron plates 15 are stacked and sandwiched, they are welded in advance via the upper reinforcing plate 18 and the lower reinforcing plate 19, thereby forming the frame 22. The frame 22 is annealed to remove distortion (FIGS. 2 and 3). When assembling the stator 11,
The electric iron plates 15 are sequentially inserted and laminated from the insertion holes 20 of the second iron core holding plate 13, and finally the cover plate 21 is addressed, and a pressure or the like is applied from above to the cover plate 21 in the direction of arrow f (FIG. 4), and 21 and the second iron core holding plate 13 are welded (FIG. 5). Further, a plurality of ribs 16 are arranged on the outer periphery of the electric iron plate 15, and the iron core holding plates 12, 13 and the electric iron plate 15 are fixed by welding.

After that, each part of the frame 22 is processed, the stator coil 23 is put in, and the processed frame 22 is attached to the machine base 1 as shown in FIG. At this time, since the frame 22 has been annealed,
High-precision machining can be performed. The processing location is
An annular alignment surface B with the bearing bracket 3 outside the first iron core holding plate 12 and a mounting surface C of the lower surface of the lower reinforcing plate 19 to the machine base 1.

According to this embodiment, the first and second iron holding plates 12, 13 are provided.
And, the upper and lower reinforcing plates 18 and 19 are welded in advance, and after annealing and removing distortion, the electric iron plate 15 is laminated,
Next, the lid plate 21 is pressed and further welded, and finally each part is processed and attached to the machine base 1. Therefore, when assembling the stator 11, the lid 21 is attached to the frame 22 from which welding distortion has already been removed.
Suffices to be welded, and the number of welding points in the finishing process is reduced to reduce welding distortion. Therefore, it is possible to assemble the stator 11 having high rigidity and high anti-vibration performance, and to perform high-precision machining, which can be optimized for an ultra-high-speed and large-capacity elevator.

 FIG. 6 shows another embodiment.

According to this embodiment, the second iron core holding plate 12 is disposed slightly inside the outer end of the laminated electric iron plate 15, and
21 is disposed outside and welded. In this case, the lid 21 is formed to be larger than the diameter of the insertion hole 20 of the second iron core holding plate 12. Even when formed in this way, when assembling the stator 11, the number of welding locations in the finishing step can be reduced.

[Effects of the Invention] As is clear from the above description, according to the present invention, at the time when the first core holding plate and the second core holding plate are welded with the upper and lower reinforcing plates to form a frame, Since the electric iron plate is not incorporated in the frame, the welded frame can be annealed to remove welding distortion. This makes the first
Further, the second iron core holding plate and the upper and lower reinforcing plates are sufficiently welded to make the stator frame strong and have high rigidity. Therefore, according to the present invention, the rigidity is high, and provided with a stator having sufficient anti-vibration performance,
An elevator hoist that can be applied to a large-capacity ultra-high-speed elevator can be manufactured.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an embodiment of an elevator hoist according to the present invention, FIG. 2 is a side view for explaining an assembling process of the stator, and FIG. 3 is an assembling process of the stator. FIGS. 4 and 5 are side views illustrating the steps of assembling the stator, FIG. 6 is a side view illustrating the steps of assembling the stator according to another embodiment, and FIG. Fig. 8 is a partial sectional side view showing a conventional elevator hoisting machine, Fig. 8 is a front view of the same, and Figs. 9 to 11 are explanatory views for explaining steps of assembling a conventional stator. 1 ... machine stand, 2 ... bearing stand, 5 ... shaft, 6 ... rotor,
7 ... sheave, 8 ... elevating body, 11 ... stator, 12 ... 1st
Iron core holding plate, 13 ... Second iron core holding plate, 15 ... Electric iron plate,
16 ... rib, 18 ... upper reinforcing plate, 19 ... lower reinforcing plate, 20
... insertion holes, 21 ... lid, 22 ... frame.

Claims (1)

(57) [Claims] 1. A sheave and a rotor of an electric motor for rotationally driving the rotating shaft are mounted on a rotating shaft supported on a machine base via a bearing stand, and a stator of the electric motor is mounted on the machine base. A method for manufacturing an elevator hoist fixed to
The stator is formed by welding a first iron holding plate and a second iron holding plate having an insertion hole with upper and lower reinforcing plates to form a frame body, and then annealing the frame body to remove welding distortion. Then, a plurality of electric iron plates are sequentially inserted into the frame from the insertion holes of the second iron core holding plate and stacked, and a lid plate that closes the insertion hole applied to the stacked electric iron plates is further covered by the lid plate. A method for manufacturing an elevator hoisting machine, characterized in that the electric iron plate is formed by pressing in the direction in which the electric iron plates are laminated and welding to the second iron core holding plate.