WO2019008761A1

WO2019008761A1 - Elevator hoist

Info

Publication number: WO2019008761A1
Application number: PCT/JP2017/025008
Authority: WO
Inventors: 新平桃木
Original assignee: 三菱電機株式会社
Priority date: 2017-07-07
Filing date: 2017-07-07
Publication date: 2019-01-10
Also published as: JPWO2019008761A1; JP6712094B2; CN110831884A

Abstract

The winding accommodation section of a stator housing has a thickness substantially the same as that of a stator excitation section in the axial direction of a rotating shaft. The center of the stator, which is located near the rotating shaft, has formed therein a recess which is concentric with the rotating shaft. The winding accommodation section has formed thereon: an inner cylinder surface facing the outer diameter section of a sheave; and an outer cylinder surface which is located on the side of the winding accommodation section away from the sheave and which is aligned parallel to the inner cylinder surface. The inner cylinder surface of the stator housing is located between the stator and the sheave. The sheave is accommodated in the recess. As a result, a part of the sheave and a part of the stator overlap each other in the radial direction of the sheave.

Description

Elevator hoisting machine

The present invention relates to an elevator hoisting machine provided with an axial gap type motor.

An elevator hoist is known for winding an elevator rope which suspends an elevator car, a counterweight and the like. Generally, such an elevator hoisting machine comprises a motor, a stator housing accommodating the motor's stator, and a sheave that is rotatably fixed to the rotating shaft of the motor and winds the hooked elevator rope. There is.

In the elevator hoisting machine described in Patent Document 1, a sheave and a rotor of a motor are integrally formed. Further, a stator winding of the motor is supported by the stator housing on the radially outer side of the sheave and is opposed to the rotor winding.

The elevator hoisting machine described in Patent Document 2 has a structure in which a portion of a motor stator housing and a sheave overlap in the radial direction of the sheave. Thus, the thickness of the elevator hoisting machine in the axial direction of the rotation shaft of the motor is reduced by the thickness of the stator housing.

Unexamined-Japanese-Patent No. 7-139692 Unexamined-Japanese-Patent No. 2010-143661

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 disposed in parallel with the rotor in the axial direction of the motor rotation shaft, the motor rotation shaft The thickness of the elevator hoisting machine in the axial direction of

Further, in the elevator hoisting machine described in Patent Document 2, even if a portion of the stator housing and the sheave have a structure overlapping in the radial direction of the sheave, the thickness of the stator housing is generally 10 mm. However, the effect of reducing the thickness of the elevator hoisting machine in the axial direction of the rotation 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 hoist that is configured without increasing the thickness in the axial direction of the rotation shaft of the motor.

In order to solve the above-described problems, an elevator hoisting machine according to the present invention is rotatable with an axial gap type motor having a rotor and a stator axially opposed to the rotor, and an elevator rope is hooked A stator having a recess radially inward, the sheave being disposed in the recess and at least a portion of the sheave and at least a portion of the stator overlapping in the radial direction of the sheave There is.

In the elevator hoisting machine according to the present invention, the stator has the recessed portion radially inward, the sheave is disposed in the recessed portion, and at least a portion of the sheave and at least a portion of the stator extend in the radial direction of the sheave Since they overlap, it is possible to configure without increasing the thickness in the axial direction of the rotation shaft of the motor.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the winding machine for elevators which concerns on embodiment of this invention. It is sectional drawing of the winding machine for elevators cut | disconnected by the II-II line of FIG. FIG. 3 is a cross-sectional view of the lower half of the elevator hoisting machine taken along line III-III in FIG. 1; It is sectional drawing which concerns on the modification of embodiment of this invention of the winding machine for elevators shown in FIG.

Hereinafter, an embodiment of the present invention will be described based on the attached drawings.
FIG. 1 is a front view of an elevator hoisting machine according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the elevator hoisting machine shown in FIG. 1 cut along a cutting line II-II.

Referring to FIG. 1, an elevator hoisting machine 10 provided on a hoistway of an elevator (not shown) is provided with a motor 20 and a sheave 30 formed to have a diameter smaller than the outer diameter 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 is composed of a stator 40, a rotor 50, and a rotating shaft 60. In FIG. 1, the rotor 50 is shown by a broken line because it is hidden by the stator housing 41 accommodating the stator 40.

The sheave 30, which will be described in detail later, is accommodated in a recess 42 formed concentrically with the rotation shaft 60 near the central portion of the stator 40, that is, radially inward. Further, a rotation shaft 60 is rotatably joined to the center of the sheave 30. That is, the sheave 30 can rotate with the rotor 50. On the sheave 30, an elevator car (not shown) and an elevator rope 70 for hanging a counterweight are hung. The elevator rope 70 is impregnated with lubricating oil.

The stator 40 has a stator excitation portion 43 which is located radially outside of the sheave 30, ie, radially outside of the recess 42, and is formed in an annular shape as a whole. In the stator excitation unit 43, a plurality of stator cores 45 around which the stator winding 44 is wound are arranged in a ring shape. A portion of the stator housing 41 that accommodates the stator excitation portion 43 is referred to as a winding accommodation portion 46. Below the stator 40, there are formed a first notch 47a and a second notch 47b in which a part of the stator excitation portion 43 is cut out together with the winding accommodating portion 46 in the vertical direction of the stator 40. The first notch 47a and the second notch 47b constitute a notch. The stator excitation portion 43 is formed in a shape that is not a complete ring shape but a part of the ring shape due to the first notch 47a and the second notch 47b. An elevator rope 70 is disposed in the first notch 47a and the second notch 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 disposed to face each other in the axial direction of the rotation shaft 60. Further, the rotor 50 is provided with a rotor magnet 51 which is a permanent magnet 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 rotor 50 is braked by pressing the brake shoe 81 of the braking device 80 against the braking surface 52.

The winding accommodating portion 46 of the stator housing 41 supports the stator excitation portion 43. Further, the winding accommodating 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 accommodating portion 46 has substantially the same thickness as that of the stator excitation portion 43 in the axial direction of the rotating shaft 60. The inner cylindrical surface 41b, which is a surface facing the outer diameter portion 32 of the sheave 30, and the outer cylinder located in parallel with the inner cylindrical surface 41b on the distal side from the sheave 30 in the winding accommodating portion 46 A face 41c is formed.

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

As described above, the sheave 30 is accommodated in the recess 42. Therefore, a part of the sheave 30 and a part of the winding accommodating portion 46 overlap in the radial direction of the sheave 30. Thereby, a part of the sheave 30 and a part of the stator 40 are provided so as to overlap in the radial direction. Further, as described above, the brake device 80 is provided outside the stator 40 and the braking surface 52. Thereby, a part of the stator 40, the rotor 50 and the brake device 80 are provided so as to overlap in the radial direction. Therefore, the thickness of the elevator hoisting machine 10 of this embodiment in the axial direction of the rotation shaft 60 is thinner than that of the elevator hoisting machine in which the sheave 30 and the stator 40 are not provided overlapping in the radial direction. Become. Further, the elevator hoisting machine 10 according to this embodiment has the axis of the rotating shaft 60 in comparison with the elevator hoisting machine in which the stator 40 and the rotor 50 and the brake device 80 are not overlapped in the radial direction. The thickness in the direction becomes thinner.

Further, in an elevator hoisting machine in which the stator and the rotor are provided on the radially outer side of the sheave without interrupting, as described in Patent Document 1, the lubricating oil impregnated in the elevator rope is There is a risk that the rotation of the vehicle may scatter and contaminate the brake braking surfaces of the stator and the rotor. On the other hand, elevator hoisting machine 10 according to this embodiment has inner cylindrical surface 41 b between stator 40 and sheave 30, and sheave 30 is accommodated in recess 42. Therefore, even if oil splashes from the elevator rope 70 due to the rotation of the sheave 30, it is stopped at the inner cylindrical surface 41b. Therefore, it is possible to prevent the contamination of the stator 40 and the braking surface 52 of the rotor 50 with oil.

3 is a cross section of the lower half of the elevator hoisting machine 10 described in FIG. 1 taken along the cutting line III-III (in addition, the stator excitation portion 43 and the winding accommodation portion not on the III-III line) 46 is omitted). The stator excitation portion 43 is not provided in the cutout portion 47 a, and the stator housing 41 outside the concave portion 42 is formed along the radial direction of the rotor 50. Therefore, the elevator rope 70 can be disposed in the notch 47a without passing through the stator excitation unit 43 and can pass through the notch 47a. In addition, it is the same structure also about the notch part 47b.

As described above, the elevator hoisting machine 10 according to this embodiment includes the axial gap type motor 20 having the rotor 50 and the stator 40 opposed in the axial direction of the rotor 50. Moreover, it is rotatable with the rotor 50, and is provided with the sheave 30 with which the elevator rope 70 is hung. Furthermore, a recess 42 is formed in the central portion of the stator 40 concentrically with the rotation shaft 60, and the sheave 30 is disposed in the recess 42, and at least a portion of the sheave 30 and at least a portion of the stator 40 Overlap in the radial direction. Therefore, the configuration can be made without increasing the thickness in the axial direction of the rotation shaft 60 of the motor 20.

In addition, the stator 40 is provided with first and

second notches

47 a and 47 b which are partially cut out on the radially outer side 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 portion 43.

Further, the stator 40 includes a stator housing 41, and the stator housing 41 has an inner cylindrical surface 41 b facing the outer diameter portion 32 of the sheave 30. The recess 42 has an inner cylindrical surface 41 b. Therefore, even if the oil impregnated in the elevator rope 70 is scattered due to the rotation of the sheave 30, the scattered oil is stopped by hitting the inner cylindrical surface 41b of the stator housing 41 constituting the recess 42. Therefore, the oil of the elevator rope 70 does not splash on the braking surface 52 of the stator 40 and the rotor 50, and the equipment can be prevented from being contaminated by the oil.

Further, since the inner cylindrical surface 41b is formed in the stator housing 41, the size in the radial direction of the recess 42 can be freely changed by replacing with the stator housing in which the position of the inner cylindrical surface 41b is different. For example, as shown in FIG. 4, when using a sheave 30a having a radius smaller than the diameter of the sheave 30 according to the embodiment, the recess 42 of the embodiment is adapted to fit the sheave 30a. It replaces | exchanges for the stator housing 41a which has the inner cylinder surface 41b which forms the small diameter recessed part 42a. Therefore, in the same elevator hoisting machine 10, sheaves having different diameters such as the

sheaves

30, 30a can be used simply by replacing the

stator housings

41, 41a.

In this embodiment, the first and

second notches

47a and 47b are provided below the stator 40 as shown in FIG. 1, but the number, position and shape of the notches may be any number. . In the embodiment, the outer peripheral surface of the rotor 50 also serves as the braking surface 52, and two braking devices 80 are provided outside, but the configuration of the braking drum, the braking surface 52 and the braking device 80 is any other configuration It may be

DESCRIPTION OF SYMBOLS 10 Winder for elevators, 20 motor, 30, 30a sheave, 32 outer diameter part, 40 stator, 41, 41a stator housing, 41b inner cylindrical surface, 42, 42a recessed part, 47a 1st notch (notch part), 47b Second notch (notch), 50 rotors.

Claims

An axial gap type motor having a rotor and a stator opposed in the axial direction of the rotor;
A sheave that is rotatable with said rotor and on which an elevator rope can be hung;
The stator has a recess on the radially inner side,
An elevator hoisting machine, wherein the sheave is disposed in the recess, and at least a portion of the sheave and at least a portion of the stator overlap in a radial direction of the sheave.
The stator includes a cutaway portion that is partially cut out on the radially outer side of the recess,
The elevator hoisting machine according to claim 1, wherein the elevator rope is disposed in the notch portion.
The stator comprises a stator housing,
The elevator winding machine according to claim 1, wherein the stator housing has an inner cylindrical surface that faces the outer diameter portion of the sheave and constitutes the recess.