KR100705144B1 - Thin hoist for elevator - Google Patents

Abstract

It is a thin hoist for elevators which reduces the number of components, reduces the thickness in the width direction, reduces thickness and weight, improves the degree of freedom of the installation site, and reduces the plane surface of the hoistway. The main body 202 of the hoisting machine, the main shaft 217 provided on the main body, the rotating body 219 supported by the main shaft, the drive sheave 220 formed on the rotating body, the stator 218 provided on the main body, and the rotating body An armature 221 disposed on the outer circumference of the stator to constitute an electric motor together with the stator, a braking surface 291 formed on a rotating body having a diameter larger than that of the drive sheave, and a braking surface disposed to face the braking surface. It is provided with a brake 222 that pressurizes and brakes. The main body bottom surface 204 connected to the bearing support portion 205 supporting the main shaft of the rotating body and the driving sheave are arranged in close proximity, and the main shaft of the rotating body can be cantilevered from the bearing supporting portion of the main body.

Description

Thin hoist for elevator {THIN HOIST FOR ELEVATOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin hoisting machine used in an elevator without a machine room, and relates to a thin hoisting machine for an elevator that has been designed to simplify the structure and to realize a thinner and lighter weight.

As a thin hoisting machine used for an elevator without the conventional machine room, the thin hoisting machine of Unexamined-Japanese-Patent No. 2000-289954 is known, for example. In this thin hoist, the main rope is wound around a drive sheave. Then, the drive sheave is rotated by the stator coil and the armature, and the main rope is driven by the frictional force, thereby raising the car and the counter weight in opposite directions. When the car of the elevator arrives at a predetermined floor, the electromagnet is opened to convey the spring force of the brake spring to the braking surface via the brake arm, spherical washer and brake shoe. The hoist is stopped.

In the conventional thin hoisting machine, since it is comprised as mentioned above, each component must be processed or assembled with high precision, in order to require many parts, and to reduce the weight and manufacturing error by the combination of component parts, It was causing the cost increase. Moreover, the thickness of the whole also became thick, and the elevator of the system without the machine room which installs a hoist between a hoistway wall and a car has a problem that the thickness of the hoister causes the hoistway planar area to expand.

Summary of the Invention

SUMMARY OF THE INVENTION The present invention solves such a conventional problem by simplifying the structure, reducing the number of components, reducing the thickness in the width direction, making the thickness thinner and lighter, and improving the degree of freedom of the installation site. An object of the present invention is to obtain a thin hoist for elevators which has been reduced in size.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention in more detail, it is described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the thin hoist for elevators in Example 1 of this invention.

2 is a cross-sectional view showing a thin hoist for elevators in the first embodiment of the present invention;

3 is an enlarged cross sectional view of the bearing portion of FIG. 2;

1 is a front view showing a thin hoist for elevator in Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view showing a thin hoist for elevator in Embodiment 1 of the present invention, and FIG. An enlarged sectional view of the bearing portion.

In the figure, the main body 202 configured to be thinner in the axial direction has an opening edge 203 that accommodates a part of the rotating body 219 described later on the outer circumference and forms a receiving space for the stator 218. The bottom face 204 which becomes substantially the same surface as the front-end | tip of the opening edge part 203 is provided. The bearing support part 205 of the bearing 240 which rotationally supports the main shaft 217 is provided in the center part of the main body 202. As shown in FIG. That is, the bearing support part 205 which supports the main shaft 217 is connected to the bottom face 204 of the main body 202. The stator 218 is installed together with the stator coils on the inner surface of the opening edge 203 of the outer circumference of the main body 202. The cup-shaped rotating body 219 is arranged so that a part thereof is inserted into the main body 202, thereby making the whole of the winding machine thin. The rotating body 219 integrally constitutes the drive sheave 220 on the outer circumferential surface on the opposite side to the bottom 204 of the main body 202, and is fitted to the outside of the flange portion 217a of the main shaft 217. That is, it is comprised by the bearing support part 205 formed in the cantilever form from the main body 202, and the rotating body 219 integrated with the drive sheave 220 supported by the bearing 240 mounted therein, Since the rotary body 219 and the main body 202 come close to each other, a hoist formed thin in the axial direction can be obtained. In addition, since the mounting surface of the main shaft 217 is interposed between the rotating body 219 and the main body 202, the rotating joint 219 of the rotating body 219 and the main shaft 217 is rotated from the left side of FIG. 2. Can be detached, and the assembly or replacement of the rotating body 219 can be performed simply by removing the fastening screw. The part which is integrally formed with the drive sheave 220 at the opening edge side of the rotating body 219 and has a diameter larger than the outer diameter of the drive sheave is accommodated in the opening edge 203 of the main body 202, and has a large diameter. The rotor 221 is provided on the outer peripheral surface of the part. The rotor 221 is disposed to face the stator 218. The main shaft 217 is supported by a bearing support 205 integrally formed at the center of the bottom 204 of the main body 202 disposed in parallel with the rib face 220a of the rotating body 219. . At the end of the bearing support 205, a bearing stopper 205a is provided which positions the outer race of the bearing 240. The main shaft 217 is provided with a bearing inner ring stopper 217a for positioning the inner race of the bearing 240. In the bearing 240, a bearing nut 241 for fixing the inner ring of the bearing 240 to the main shaft 217, and a bearing holder 242 for fixing the outer ring of the bearing 240 to the bearing support 205. Is provided, and the positional relationship between the main shaft 217 and the main body 202 is set by fixing the bearing nut 241 and the bearing holder 242. The bearing 240 needs to fix the inner and outer rings, but in assembling the hoisting machine, the bearing 240 is inserted between the main shaft 217 and the inner diameter of the bearing support 205, and the inner ring side of the bearing 240 The bearing nut 241 and the outer ring side are respectively fixed by the bearing holder 242. Both of these assembly can be performed from the half sheave side, without reversing a traction machine every time a screw is tightened, and the assembly time can be shortened. The electromagnetic brake 222 is integrally formed with a field 222a of electromagnets arranged side to side. The electromagnetic brake 222 has an armature 222b for an electromagnet, a screw rod 222c fixed to the armature 22b and having a spherical surface at its distal end, and a spherical surface at the spherical surface of the screw rod 222c. A spherical washer 222d for contacting is provided. The brake shoe 226 which contacts the braking surface 291 of the rotating body 219 at the time of brake braking is comprised so that it may contact and hold the screw rod 222c by the leaf spring 222e attached to this brake shoe. A stopper 202a is provided at a position of the main body 202 corresponding to a position where the brake shoe 226 of the rotating body 219 is disposed, and a stopper for holding a load along the brake shoe 226 when the brake is braked. Serve the role of. That is, the brake shoe 226 is pressed by the brake spring 225 to the braking surface 291 to generate brake torque. At this time, a force is generated in the brake shoe 226 in the tangential direction of the braking surface 291, but this force is borne by the cutout portion 202a of the main body 202. When the brake electromagnet is opened, the structure in which the armature 222b and the brake shoe 226 linearly move the cutout 202a of the main body 202 by the brake spring 225 as a guide is direct-acting. type). This direct type feature is simple in structure and excellent in cost and reliability. Further, even when only one of the left and right brakes is operated, there is an advantage that the brake torque value does not change depending on the rotational direction. An oil seal 243 is provided between the bearing support portion 205 and the main shaft 217, and oil supplied to the bearing 240 is prevented from entering the braking surface 291 of the brake. The main rope 212 is wound around the drive sheave 220, and although not shown, cars and balancing weights are connected to both ends thereof.

The thin hoist for elevators configured as described above is provided with a main shaft (by placing the bearing support portion 205 and the bottom face 204 of the main body 202 supporting the bearing support portion close to the drive sheave 220 with a large load). Although the support structure of 217 is cantilevered, the load by the bearing support part 205 is reduced. In addition, a bearing support part is arrange | positioned inside (inside) of a drive sheave. Therefore, the functional configuration is the same as that of the conventional hoisting machine, and the main rope 2 is wound by the friction force in the state in which the main rope 212 which suspends the ka and the balance weight is wound around the drive sheave 220 by an electric motor by the stator and the rotor. 212 is driven to elevate the car and the counterweight in opposite directions. In addition, the electromagnet fields 222a of a pair of left and right brakes which press the braking surface 291 formed on the inner circumferential surface of the large diameter portion on the opening edge side of the rotating body 219 by the brake shoes 226 as an integral configuration Since it is a structure fixed to the bottom surface 204 of the main body 202, and it is set as the structure which hold | maintains the load according to the brake shoe 226 at the cutout part 202a of the main body 202 at the time of brake braking, Can be reduced. In addition, by reducing the number of parts, the number of manufacturing steps and maintenance can be simplified, and the thickness of the hoisting machine can be made even thinner.

The thin hoisting machine for elevators which concerns on this invention can reduce the number of parts which comprise a hoisting machine, and can reduce cost. In addition, since the thickness and weight are reduced, the degree of freedom of the installation site can be increased, and the lifting path plane space can be further reduced.

Claims (8)

A main body, a main shaft set on the main body, a rotating body supported and rotating on the main shaft, a drive sheave formed on the rotating body, a stator provided on the main body, and disposed on the outer periphery of the rotating body to face the stator. The stator includes a rotor constituting an electric motor, a braking surface formed on the rotating body having a diameter larger than the outer shape of the drive sheave, and a brake disposed opposite to the braking surface and pressed against the braking surface to perform braking operation. In the hoist for elevator, The main body has an opening edge that accommodates a portion of the rotating body on the outer periphery and forms a receiving space for the stator, and has a bottom surface that is substantially the same as the front end of the opening edge, and the main shaft is provided at the center of the bottom surface. The bearing support part of the bearing to support rotationally is installed, The rotating body is accommodated and disposed so that a portion thereof is fitted to an inner surface of the opening edge of the outer circumference of the main body, The stator is provided on the inner surface of the opening edge of the outer circumference of the main body, The rotor is disposed on the outer circumferential surface of the large diameter portion having a diameter larger than the outer diameter of the drive sheave on the opening edge side of the rotating body, The braking surface is formed on the inner circumferential surface of a large diameter portion having a diameter larger than the outer diameter of the drive sheave of the rotating body, The brake is disposed fixed to the bottom of the main body facing the braking surface, The main body bottom connected with the bearing support part which supports the main shaft of the said rotating body, and a drive sheave are arrange | positioned adjacently, and the main axis of the said rotating body can be cantileveredly supported by the bearing support part of the main body, It is characterized by the above-mentioned. Thin hoist for elevator. delete The method of claim 1, The bearing supporting the main shaft is positioned by the bearing positioning stopper provided on the end face of the bearing support of the main body and the main shaft respectively, and the bearing nut and the bearing holder are disposed on the opposite side of the bearing, and the bearing can be assembled on the main body side. Characterized by Thin hoist for elevator. The method of claim 3, wherein The brake is housed in the main body, the brake electromagnet is fixed to the bearing support of the main body, and a cutout for storing the brake shoe along the inner circumference of the rotating body of the main body is provided to stop the brake shoe during brake braking. Characterized Thin hoist for elevator. The method of claim 4, wherein The field of the electromagnets for the left and right brakes are integrally configured. Thin hoist for elevator. The method of claim 5, Characterized in the structure of the brake on the left and right Thin hoist for elevator. The method according to any one of claims 1 and 3 to 5, The junction part of the main shaft of a rotating body was arrange | positioned outside the flange part of a main shaft, It is characterized by the above-mentioned. Thin hoist for elevator. The method of claim 7, wherein An oil seal is provided between the outer circumference of the bearing support of the main body and a part of the main shaft to prevent oil from entering the brake braking surface. Thin hoist for elevator.

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