KR100790654B1 - Elevator hoist - Google Patents

Abstract

In the elevator apparatus, the cylindrical stator attachment part is provided in the housing. The housing is provided with a main shaft so as to be located at the center of the stator attachment portion. The drive sheave is rotatable about the main axis. The motor stator is attached to the outer periphery of the stator attachment part. The drive sheave is equipped with a motor rotor so as to face the motor stator.

Description

Hoist for elevator {ELEVATOR HOIST}

The present invention relates to an elevator hoisting machine having a drive sheave in which a main rope is wound.

For example, in the conventional elevator hoisting machine shown in Unexamined-Japanese-Patent No. 2001-19322, the armature winding is fixed to the outer peripheral part of the fixed shaft fixed to the support frame. The drive sheave on which the elevator main rope is wound is rotatably supported by the fixed shaft and the bearing post. On the inner circumferential surface of the drive sheave, a plurality of permanent magnets are fixed to face the armature winding. The drive sheave is rotated about the fixed axis by the driving force of the motor, including the armature winding and the permanent magnet.

Further, a brake disc which is integrally rotated with the drive sheave is fixed to one end of the drive sheave. The brake unit body is mounted on the bearing stand. The brake device body brakes rotation of the brake disc and the drive sheave by sandwiching the brake disc.

The drive sheave is also provided with a detection shaft that is integrally rotated with the drive sheave. The detection shaft protrudes on the semi-driven sheave side of the bearing stage. An encoder for detecting rotation of the detection shaft is mounted on the semi-driven sheave side of the bearing arm.

However, in the above conventional elevator hoisting machine, when a large motor output is required, the diameter or axial dimension of the fixed shaft needs to be increased in order to increase the armature winding, and the whole becomes large.

In addition, since the encoder is disposed on the semi-driven sheave side of the bearing stage, the encoder protrudes from the shaft end portion of the whole hoisting machine, and the overall axial dimension thereof becomes large. In addition, the encoder may be damaged by colliding with another object during transportation of the hoisting machine.

In addition, when a larger braking force is required with an increase in the motor output, it is necessary to enlarge the brake disc and the brake device main body, which also increases the size of the whole hoisting machine.

The present invention has been carried out to solve the above problems, and an object thereof is to obtain an elevator hoisting machine capable of miniaturizing the whole.

Elevator hoist according to the present invention is a housing having a cylindrical stator attachment portion, a main shaft provided in the housing so as to be located in the center of the stator attachment portion, a cylindrical drive sheave rotatable about the main shaft, a motor mounted to the outer peripheral portion of the stator attachment portion And a motor rotor mounted to the drive sheave so as to face the stator and the motor stator.

In addition, the hoist for elevator according to the present invention includes a housing, a main shaft fixed to the housing and having a concave portion at one end thereof, a cylindrical drive sheave rotatable about the main shaft, a motor portion for rotating the drive sheave, and a tip portion in the concave portion. A detection shaft inserted and rotated integrally with the drive sheave, and a rotation detector disposed in the recess and detecting rotation of the detection shaft.

In addition, the hoist for elevator according to the present invention includes a housing, a cylindrical drive sheave rotatable with respect to the housing, a motor portion for rotating the drive sheave, first and second brake discs installed in the drive sheave and integrally rotated with the drive sheave; A first brake device body provided in the housing and braking the rotation of the drive sheave by clamping the first brake disc, and a second brake installed in the first brake device body and braking the rotation of the drive sheave by clamping the second brake disc. Equipped with a device body.

1 is a cross-sectional view of a hoist for elevators according to an example of embodiment of the present invention;

FIG. 2 is a front view showing the hoist for elevator of FIG. 1;

3 is an enlarged cross-sectional view showing a main part of FIG. 1;

4 is a cross-sectional view showing another example of use of the hoist for elevator of FIG. 1;

5 is a front view showing the hoist for elevator of FIG. 4,

It is a block diagram which shows an example of the elevator apparatus using the elevator traction machine of FIG.

EMBODIMENT OF THE INVENTION Hereinafter, very suitable embodiment of this invention is described with reference to drawings.

Embodiment 1.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the elevator hoisting machine by an example of embodiment of this invention, FIG. 2 is a front view which shows the elevator hoisting machine of FIG. 1, FIG. 3 is sectional drawing which expands and shows the principal part of FIG. Here, the thin traction machine of the whole axial dimension is smaller than the dimension of the direction orthogonal to an axial direction.

In the drawing, the metal housing 1 has a base portion 1a provided at the lower end portion, a stand portion 1b provided on the base portion 1a, and a cylindrical stator attachment portion protruding to one side from the stand portion 1b. 1c and the brake attachment part 1d provided in the outer periphery of the stand part 1b. A shaft fitting hole 1e is provided in the stand portion 1b.

The main shaft (here, the fixed shaft) 2 is fitted and fixed to the shaft fitting hole 1e. At one end (front end) of the main shaft 2, a recess 2a is provided. In addition, the main shaft 2 is provided with a straight wiring hole 2b parallel to the axial direction. One end of the wiring hole 2b is opened in the recess 2a. Moreover, the other end of the wiring hole 2b is opened in the end surface of the other end (base end) of the main shaft 2.

The drive sheave 4 is supported by the main shaft 2 via the some bearing 3. The drive sheave 4 is rotatable about the main shaft 2. Moreover, the drive sheave 4 is a cylindrical bearing mounting part 4a, the cylindrical outer cylindrical part 4b provided at intervals radially with respect to the bearing mounting part 4a, the bearing mounting part 4a, and an outer cylindrical part. It has the connecting part 4c which connects 4b. The bearing mounting portion 4a, the outer cylindrical portion 4b, and the connecting portion 4c are integrally formed.

The bearing 3 is interposed between the outer circumferential surface of the main shaft 2 and the inner circumferential surface of the bearing mounting portion 4a. Positioning end portions 2c and 4d for positioning the bearing 3 in the axial direction of the main shaft 2 are provided on the outer circumferential surface of the main shaft 2 and the inner circumferential surface of the bearing mounting portion 4a.

On the outer circumferential surface of the outer cylindrical portion 4b, a plurality of rope balls 4e are formed. The rope port 4e is inserted with a car and a plurality of main ropes for fastening the counterweight. That is, the main rope is wound around the outer circumferential surface of the drive sheave 4.

The first disk mounting portion 4f is provided at one end in the axial direction of the outer cylindrical portion 4b. The second disk mounting portion 4g is provided at the other end portion in the axial direction of the outer cylindrical portion 4b. Moreover, the ring-shaped annular sphere 4h is provided in the cross section of the one end part in the axial direction of the outer side cylindrical part 4b. In addition, the housing 1 is provided with a ring-shaped annular projection 1f inserted into the annular sphere 4h.

The main shaft 2 is equipped with a stopper 5 for preventing the omission of the bearing 3 from the main shaft 2. On the outer circumferential portion of the stator attachment portion 1c, a motor stator 6 arranged in a ring shape including an armature winding is fitted and fixed. On the inner circumferential surface of the outer cylindrical portion 4b, a motor rotor 7 made of a plurality of permanent magnets is fixed to face the motor stator 6. The drive sheave 4 is rotated by the driving force of the motor portion 8 composed of the motor stator 6 and the motor rotor 7.

The first brake disk 9 is attached to the first disk mounting portion 4f. In the second disk mounting portion 4g, a second brake disk 10 opposite to the first brake disk 9 is mounted. The material and the size of the first and second brake discs 9, 10 are the same.

The first and second brake discs 9 and 10 are fixed to the disc mounting portions 4f and 4g by a plurality of bolts, respectively, and rotate integrally with the drive sheave 4. Thus, the first and second brake discs 9 and 10 are detachable with respect to the drive sheave 4.

The brake attachment part 1d is equipped with a plurality of first brake device main bodies 11 (three here) that brake the rotation of the drive sheave 4 by clamping the first brake disc 9. Each first brake device main body 11 is fixed to the brake attachment portion 1d by a plurality of bolts.

Each first brake device main body 11 is equipped with a second brake device main body 12 that brakes the rotation of the drive sheave 4 by sandwiching the second brake disc 10. Each second brake device main body 12 is fixed to the first brake device main body 11 by a plurality of bolts. Thus, the second brake device main body 12 is detachable with respect to the first brake device main body 11.

In addition, the second brake device main body 12 is supported by the housing 1 via the first brake device main body 11.

The brake device main bodies 11 and 12 generate the braking force by pressing the brake shoe with the brake discs 9 and 10 by the spring force of the brake spring, and simultaneously brake the brake shoe by the suction force of the electromagnetic magnet. 10) An electromagnetic brake device is used to open and release the braking force. In this embodiment, the braking capabilities of the brake device bodies 11 and 12 are the same.

In addition, the brake apparatus in this embodiment has the 1st and 2nd brake disks 9 and 10 and the 1st and 2nd brake apparatus main bodies 11 and 12. As shown in FIG.

At the one end in the axial direction of the bearing mounting portion 4a, a bearing cover 13 covering the gap between the main shaft 2 and the bearing mounting portion 4a is mounted. The bearing cover 13 is provided with an opening 13a facing the recess 2a.

The bearing cover 13 is equipped with a detection shaft 14 which rotates integrally with the drive sheave 4. The tip end of the detection shaft 14 is inserted into the recess 2a. The detection shaft 14 is provided with a disc-shaped lid portion 14a covering the opening 13a.

Positioning end parts 15 and 16 are provided in the part to which the bearing cover 13 of the drive sheave 4 is mounted, and the part to which the detection shaft 14 of the bearing cover 13 is mounted, respectively. The edge parts 15 and 16 are formed by the high precision machining. As a result, the detection shaft 14 is more accurately positioned at the center of the drive sheave 4.

In the recessed part 2a, the encoder 17 as a rotation detector which detects the rotation of the detection shaft 14 is arrange | positioned. An electrical wiring (cable) 18 is connected to the encoder 17. The electrical wiring 18 is drawn out from the other end of the main shaft 2 via the wiring hole 2b.

In such an elevator hoisting machine, since the stator 6 is attached to the stator attachment part 1c provided in the housing 1, the diameter of the stator 6 becomes large. For this reason, the winding amount of the stator 6 can be increased, and the stator 6 can be made thin, and the axial dimension of the whole hoisting machine can be made small and it can be miniaturized.

As the whole of the hoist can be miniaturized in this way, the hoist can be easily installed even in a narrow space. Therefore, it is effective to apply to an elevator having a small space in the machine room or an elevator without a machine room in which the hoist is installed in the hoistway.

Moreover, since the recessed part 2a was provided in the one end part of the main shaft 2, and the encoder 17 was arrange | positioned in the recessed part 2a, the axial dimension of the whole hoisting machine can be made small, and at the same time, the encoder Damage to (17) can be prevented.

Moreover, since the cover part 14a which blocks the opening part 13a of the bearing cover 13 is provided in the detection shaft 14, the recessed part 2a will be sealed and dustproof and spinning against the encoder 17 can be achieved. Can be.

Furthermore, since the end parts 15 and 16 are provided, the attachment position adjustment of the encoder 17 can be omitted.

Moreover, since the electrical wiring 18 from the encoder 17 is withdrawn from the other end of the main shaft 2 through the wiring hole 2b provided in the main shaft 2, the electrical wiring 18 can be fixed to the outer peripheral part of the winding machine. There is no need and installation of the hoist is easy.

Moreover, the 2nd brake disc 10 is attached to the 1st brake apparatus main body 11 which attaches the 1st and 2nd brake discs 9 and 10 to the drive sheave 4, and clamps the 1st brake disc 9. Since the 2nd brake apparatus main body 12 which clamps the is attached, many brake apparatus main bodies 11 and 12 can be arrange | positioned in a narrow space, and high braking force can be obtained, while minimizing the hoisting machine.

Here, FIG. 4 is sectional drawing which shows the other example of use of the elevator traction machine of FIG. 1, and FIG. 5 is a front view which shows the elevator traction machine of FIG. In this example, the second brake disc 10 is removed from the drive sheave 4 and the second brake device main body 12 is removed from the first brake device main body 11. In addition, the number of the first brake device main bodies 11 is reduced to two.

In this way, since the second brake disc 10 and the second brake device main body 12 are detachable, the number of brake discs and the brake device main body can be changed in accordance with the output of the motor portion 8, thereby providing optimum braking force. Can be selected.

In addition, in the said example, although shown about the thin hoisting machine, this invention is applicable also to the hoisting machine whose whole axial dimension is larger than the dimension of the direction orthogonal to an axial direction.

In addition, in the above example, two brake disks are provided, but three or more brake disks may be provided at intervals in the axial direction of the drive sheave. For example, when a 3rd brake disk is provided in a drive sheave, what is necessary is just to attach the 3rd brake apparatus main body which clamps a 3rd brake disk to the 2nd brake apparatus main body.

In addition, although the main shaft 2 is being fixed to the housing 1 in the said example, you may fix a drive sheave to a main shaft, and to support a main shaft rotatably by a housing.

Here, FIG. 6 is a block diagram which shows an example of the elevator apparatus using the elevator traction machine of FIG. In the figure, a machine room 22 is provided above the hoistway 21. In the upper part of the machine room 22, the machine base 23 is provided. An elevator traction machine 24 and a deflector sheave 25 are mounted on the machine table 23. In the machine room 22, the control panel 26 which controls the hoist 24 for elevators is provided.

A plurality of main ropes 27 (only one is shown in the figure) are wound around the drive sheave 4 and the deflector sheave 25 of the hoist 24 for an elevator. A car 28 is connected to the first end of the main rope 27. The counterweight 29 is connected to the second end of the main rope 27. The car 28 and the counterweight 29 are suspended in the hoistway 21 in a 1: 1 roping manner by the main rope 27. In the lower part (bottom part) of the hoistway 21, the shock absorber 30 for a cage | basket | car and the shock absorber for balance weights (not shown) are provided.

In addition, although the elevator hoist 24 is provided in the machine room 22 in FIG. 6, this invention is applicable also to the elevator which does not have a machine room in which the elevator hoist is arrange | positioned in the hoistway. In this case, the elevator hoisting machine can be installed in the upper part or the lower part of a hoistway.

Moreover, the elevator hoisting machine may be provided so that the rotating shaft of a drive sheave may be horizontal, or may be installed so that it may become vertical or almost vertical.

Claims (7)

delete A housing, a main shaft fixed to the housing and provided with a recess at one end thereof, a cylindrical driving sheave supported by the main shaft through a bearing and rotatable about the main shaft, a motor unit for rotating the driving sheave; A bearing cover mounted to an axial end of the driving sheave and covering a gap between the main shaft and the driving sheave; A detection shaft mounted to the bearing cover and having a tip end inserted into the recess and rotating integrally with the drive sheave; A rotation detector disposed in the recess to detect rotation of the detection shaft, One end of the main shaft is provided with a large diameter portion and a small diameter portion having a diameter smaller than the large diameter portion adjacent to the axial end of the large diameter portion, An elevator traction machine is provided between the large diameter portion and the small diameter portion, and the inner circumferential surface of the bearing cover is in contact with the outer circumferential surface of the small diameter portion with a gap between the stairs portion. delete The method of claim 2, The said bearing cover is provided with the opening part which faces the said recessed part, The cover shaft which covers the said opening part is provided in the said detection shaft, The elevator hoisting machine characterized by the above-mentioned. delete delete delete

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