JP6712094B2 - Elevator hoist - Google Patents

Description

The present invention relates to an elevator hoist equipped with an axial gap type motor.

BACKGROUND ART An elevator hoisting machine is known for hoisting an elevator rope for suspending an elevator car or a counterweight. Generally, such an elevator hoisting machine is composed of a motor, a stator housing that accommodates the stator of the motor, and a sheave that is rotatably fixed to the rotating shaft of the motor and that winds the suspended elevator rope. There is.

In the elevator hoisting machine described in Patent Document 1, the sheave and the rotor of the motor are integrally formed. The stator winding of the motor is supported by the stator housing on the radial outside of the sheave, and faces the rotor winding.

The elevator hoisting machine described in Patent Document 2 has a structure in which a part of the stator housing of the motor and the sheave overlap with each other in the radial direction of the sheave. As a result, the thickness of the elevator hoisting machine in the axial direction of the rotating shaft of the motor is reduced by the thickness of the stator housing.

JP-A-7-137962 JP, 2010-143661, A

However, in the elevator hoisting machine described in Patent Document 1, the arrangement of the brake device is unknown, and if the brake device is arranged in parallel with the rotor in the axial direction of the rotation shaft of the motor, the rotation shaft of the motor The thickness of the elevator hoisting machine in the axial direction becomes thicker.

Further, in the elevator hoisting machine described in Patent Document 2, the thickness of the stator housing is generally 10 mm even if it has a structure in which a part of the stator housing and the sheave overlap in the radial direction of the sheave. However, there is a problem that the effect of reducing the thickness of the elevator hoisting machine in the axial direction of the rotating shaft of the motor is small.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an elevator hoisting machine configured without increasing the thickness of the rotating shaft of the motor in the axial direction.

In order to solve the above problems, an elevator hoisting machine according to the present invention is an axial gap type motor having a rotor and a stator axially opposed to the rotor, is rotatable with the rotor, and an elevator rope is hung. The stator has a recess on the inner side in the radial direction, the sheave is arranged in the recess, and at least a part of the sheave and at least a part of the stator overlap in the radial direction of the sheave. There is.

In the elevator hoisting machine according to the present invention, the stator has a recess on the inner side in the radial direction, the sheave is arranged in the recess, and at least a part of the sheave and at least a part of the stator are arranged in the radial direction of the sheave. Since they overlap, the motor can be configured without increasing the axial thickness of the rotary shaft.

1 is a front view of an elevator hoisting machine according to an embodiment of the present invention. It is sectional drawing of the elevator hoisting machine cut|disconnected by the II-II line of FIG. It is sectional drawing of the lower half of the elevator hoisting machine cut|disconnected by the III-III line of FIG. It is sectional drawing which concerns on the modification of embodiment of this invention of the elevator hoisting machine shown in FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 is a front view of an elevator hoisting machine according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of the elevator hoisting machine shown in FIG. 1 taken along section line II-II.

Referring to FIG. 1, an elevator hoisting machine 10 provided on an elevator hoistway (not shown) is provided with a motor 20 and a sheave 30 having a diameter smaller than the outer shape of the motor 20. There is. The upper side of FIG. 1 is described as the upper side of the elevator hoisting machine 10. The motor 20 includes a stator 40, a rotor 50, and a rotating shaft 60. In FIG. 1, the rotor 50 is hidden by the stator housing 41 that houses the stator 40, and thus is shown by a broken line.

As will be described in detail later, the sheave 30 is housed in a recess 42 formed near the center of the stator 40, that is, radially inward and concentric with the rotating shaft 60. A rotary shaft 60 is rotatably joined to the center of the sheave 30. That is, the sheave 30 can rotate together with the rotor 50. An elevator car (not shown) and an elevator rope 70 for hanging a counterweight are hung on the sheave 30. The elevator rope 70 is impregnated with lubricating oil.

The stator 40 has a stator excitation portion 43 that is located radially outside the sheave 30, that is, radially outside the recess 42 and is formed in a ring shape as a whole. The stator excitation part 43 is formed by arranging a plurality of stator cores 45 around which a stator winding 44 is wound in a ring shape. A portion of the stator housing 41 that houses the stator excitation portion 43 is referred to as a winding housing portion 46. Below the stator 40, a first notch 47a and a second notch 47b are formed by cutting a part of the stator excitation part 43 together with the winding housing part 46 in the vertical direction of the stator 40. The first cutout 47a and the second cutout 47b form a cutout portion. Due to the first notches 47a and the second notches 47b, the stator excitation portion 43 is formed in a shape that is not a complete ring shape but a part of a ring shape. An elevator rope 70 is arranged in the first cutout 47a and the second cutout 47b.

Two brake devices 80 supported by mounting members (not shown) are provided outside the stator 40 and the rotor 50.

As shown in FIG. 2, the rotor 50 and the stator 40 are arranged to face each other in the axial direction of the rotating shaft 60. Further, the rotor 50 is provided with a rotor magnet 51, which is a permanent magnet and is arranged in a ring shape so as to face the stator excitation portion 43. That is, the motor 20 constitutes an axial gap type motor in which the stator 40 and the rotor 50 are arranged to face each other in the axial direction of the rotating shaft 60. The outer peripheral surface of the rotor 50 also serves as the braking surface 52 of the brake drum, and the brake shoe 81 of the brake device 80 is pressed against the braking surface 52 to brake the rotor 50.

The winding housing portion 46 of the stator housing 41 supports the stator excitation portion 43. Further, the winding housing portion 46 forms a space 48 having a thickness slightly larger than the thickness of the stator excitation portion 43 in the axial direction of the rotating shaft 60. That is, the winding housing portion 46 has substantially the same thickness as the stator excitation portion 43 in the axial direction of the rotating shaft 60. Then, in the winding housing portion 46, an inner cylinder surface 41b that is a surface that faces the outer diameter portion 32 of the sheave 30, and an outer cylinder that is located distal to the sheave 30 and parallel to the inner cylinder surface 41b. The surface 41c is formed.

On the other hand, in the vicinity of the rotating shaft 60 of the stator 40, the stator housing 41 is formed along the radial direction of the rotor 50 so that the thickness of the rotating shaft 60 in the axial direction is smaller than that of the winding housing portion 46. A non-accommodating portion 49 is formed in the. Due to the non-accommodating portion 49 and the inner cylindrical surface 41 b, a recess 42 concentric with the rotating shaft 60 is formed in the stator 40 in the vicinity of the rotating shaft 60. That is, the recess 42 is formed by the non-accommodating portion 49 and the inner cylindrical surface 41b. The inner cylindrical surface 41b is located between the stator 40 and the sheave 30. Further, the outer diameter portion 32 of the sheave 30 is provided with the groove 31 formed in the circumferential direction so that the elevator rope 70 can be hung.

As described above, the sheave 30 is housed in the recess 42. Therefore, a part of the sheave 30 and a part of the winding housing portion 46 are provided so as to overlap each other in the radial direction of the sheave 30. As a result, a part of the sheave 30 and a part of the stator 40 are provided so as to overlap each other in the radial direction. Further, as described above, the brake device 80 is provided outside the stator 40 and the braking surface 52. As a result, a part of the stator 40, the rotor 50, and the brake device 80 are provided so as to overlap each other in the radial direction. Therefore, the elevator hoisting machine 10 of this embodiment has a smaller thickness in the axial direction of the rotating shaft 60 than the elevator hoisting machine in which the sheave 30 and the stator 40 are not provided so as to overlap each other in the radial direction. Become. Further, the elevator hoisting machine 10 according to this embodiment has a shaft of the rotating shaft 60 more than the elevator hoisting machine in which the stator 40, the rotor 50, and the brake device 80 are not provided so as to overlap each other in the radial direction. The thickness in the direction becomes thin.

Further, in an elevator hoisting machine, as described in Patent Document 1, in which the stator and the rotor are provided on the outside in the radial direction of the sheave without obstruction, the lubricating oil impregnated in the elevator rope is used as a rope. When the vehicle rotates, it may scatter and contaminate the braking surfaces of the stator and rotor. On the other hand, the elevator hoisting machine 10 according to this embodiment includes an inner cylindrical surface 41 b between the stator 40 and the sheave 30, and the sheave 30 is housed in the recess 42. Therefore, even if the oil is scattered from the elevator rope 70 by the rotation of the sheave 30, it is stopped by the inner cylindrical surface 41b. Therefore, it is possible to prevent oil from contaminating the braking surfaces 52 of the stator 40 and the rotor 50.

FIG. 3 is a cross section of the lower half of the elevator hoisting machine 10 shown in FIG. 1 taken along the cutting line III-III (note that the stator excitation unit 43 and the winding accommodating unit that are not on the line III-III). 46 is omitted). The stator excitation portion 43 is not provided in the cutout portion 47 a, and the stator housing 41 outside the recess 42 is formed along the radial direction of the rotor 50. Therefore, the elevator rope 70 can be disposed in the notch 47a and pass through the notch 47a without interfering with the stator excitation part 43. The cutout portion 47b has the same configuration.

As described above, the elevator hoisting machine 10 according to the present embodiment includes the axial gap type motor 20 having the rotor 50 and the stator 40 opposed to each other in the axial direction of the rotor 50. Further, the sheave 30 which can rotate together with the rotor 50 and on which the elevator rope 70 is hung is provided. Further, in the stator 40, a recess 42 is formed in the center of the stator 40 so as to be concentric with the rotating shaft 60, and the sheave 30 is arranged in the recess 42. Overlap in the radial direction. Therefore, the motor 20 can be configured without increasing the thickness of the rotating shaft 60 in the axial direction.

Further, the stator 40 includes first and second cutouts 47a and 47b, which are partially cut out on the outer side in the radial direction of the recess 42. And the elevator rope 70 is arrange|positioned at 1st, 2nd notch 47a, 47b. Therefore, even if the sheave 30 and the stator 40 overlap in the radial direction of the sheave 30, the elevator rope 70 can be hung on the sheave 30 without the elevator rope 70 interfering with the stator excitation unit 43.

Further, the stator 40 includes a stator housing 41, and the stator housing 41 has an inner cylindrical surface 41b facing the outer diameter portion 32 of the sheave 30. Further, the recess 42 has an inner cylindrical surface 41b. Therefore, even if the oil impregnated in the elevator rope 70 is scattered by the rotation of the sheave 30, the scattered oil is stopped by hitting the inner cylindrical surface 41b of the stator housing 41 forming the recess 42. Therefore, the oil of the elevator rope 70 does not scatter on the braking surface 52 of the stator 40 and the rotor 50, and it is possible to prevent those devices from being contaminated by the oil.

Further, since the inner cylindrical surface 41b is formed on the stator housing 41, the size of the recess 42 in the radial direction can be freely changed by replacing the inner cylindrical surface 41b with a different stator housing. For example, as shown in FIG. 4, when a sheave 30a having a smaller radius than the diameter of the sheave 30 according to the embodiment is used, the sheave 30a is smaller than the recess 42 of the embodiment so as to fit the sheave 30a. The stator housing 41a having an inner cylindrical surface 41b forming a recess 42a having a small diameter is replaced. Therefore, in the same elevator hoisting machine 10, sheaves having different diameters, such as sheaves 30 and 30a, can be used simply by replacing the stator housings 41 and 41a.

Further, in this embodiment, as shown in FIG. 1, the first and second notches 47a and 47b are provided below the stator 40, but the positions, shapes and numbers of the notches may be arbitrary. .. Further, in the embodiment, the outer peripheral surface of the rotor 50 also serves as the braking surface 52, and two brake devices 80 are provided on the outer side, but the configuration of the brake drum, the braking surface 52, and the braking device 80 is any other arbitrary configuration. May be

10 Elevator Hoisting Machine, 20 Motor, 30, 30a Sheave, 32 Outer Diameter Part, 40 Stator, 41, 41a Stator Housing, 41b Inner Cylinder Surface, 42, 42a Recess, 47a First Notch (Notch), 47b Second notch (notch), 50 rotor.

Claims (3)

An axial gap type motor having a rotor and a stator facing each other in the axial direction of the rotor;
A sheave that is rotatable with the rotor and on which an elevator rope can be hung,
The stator has a recess on the inner side in the radial direction,
An elevator hoisting machine, wherein the sheave is arranged in the recess, and at least a part of the sheave and at least a part of the stator overlap in a radial direction of the sheave. The stator includes a cutout portion that is partially cut away on the radial outside of the recess,
The elevator hoisting machine according to claim 1, wherein the elevator rope is arranged in the cutout portion. The stator includes a stator housing,
The elevator hoisting machine according to claim 1 or 2, wherein the stator housing has an inner cylindrical surface facing the outer diameter portion of the sheave and forming the recess.

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