JP2002274770A - Gearless hoisting machine for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer rotor type hoisting machine in which a precise rotation detector or the like of such a type as to be directly connected to a solid shaft can be installed by forming a structure in which the solid shaft as the rotation shaft of the outer rotor can be taken out of the machine. SOLUTION: This machine comprises a first overhang shaft 10 overhang- supported by a first bearing base 13, a second overhang shaft 17 facing the first overhang shaft 10 having a gap to it on one end side, to be overhang- supported by a second bearing base 19 on the other end side, and having a hole, the outer rotor slidably supported to an outer circumference of the first overhang shaft 10 and an outer circumference of the second overhang shaft 17 to be freely rotatable to the first overhang shaft 10 and the second overhang shaft 17, a sheave 1 formed on the outer rotor to rotate with the outer rotor, a solid shaft 18 fixed to the outer rotor through the gap formed between the first overhang shaft 10 and the second overhang shaft 17 to penetrate the hole in the second overhang shaft 17, and the rotation detector 12 connected to the solid shaft on the other end side of the second overhang shaft 17 to detect rotation of the solid shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gearless hoist for an elevator.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a partial cross-sectional view of a conventional permanent magnet type outer rotary type elevator gearless hoist disclosed in Japanese Patent Publication No. In the drawing, 1 is a sheave around which a rope for suspending an elevator is wound, 2 is an outer rotor frame having one end connected to the sheave 1 by a first fastening portion 33, and 3 is fixed to an inner peripheral surface of the outer rotor frame 2. The permanent magnet 4 is a stator core fixed to a support shaft 30 described later by a stator core support bolt 34, and 5 is a stator coil. The stator core 4 and the stator coil 5 are entirely supported via the support shaft 30 supported at both ends. It will be fixed to the bearing frame 31. The permanent magnet 3 and the stator core 4 have an interval of the motor air gap 37.

An outer rotor frame support frame 14 is connected to the other end of the outer rotor frame 2 by a second fastening portion 35. The outer rotor frame support frame 14 and the sheave 1 are outer ring rotational load type bearings 32. And is rotatably supported on the support shaft 30 through the shaft. The outer rotor includes a sheave 1, an outer rotor frame 2, and an outer rotor frame support frame 14.

[0004] Reference numeral 21 denotes a rotation detector as a rotary encoder that detects the rotation speed of a motor disposed on the outer peripheral side of the support shaft 30 and inside the overall support bearing frame 31. The rotation detector 21 is an outer rotor frame. The support frame 14 is largely deformed inward in the axial direction, is mounted so as to be embraced, and is disposed inside the entire support bearing frame 31.

Reference numeral 30 denotes a support shaft that supports the entire stator and brake, 31 denotes a whole support bearing frame that rotatably holds the support shaft 30 by a third fastening portion 36 and supports the whole, and 32 denotes a sheave 1 And an outer ring rotating load bearing that supports the outer rotor frame 2 and the entire rotating part.

Reference numeral 38 denotes a coil lead duct for the gearless hoist that passes through the support shaft 30 to the outside of the machine.
Reference numeral 39 denotes a brake device for controlling the rotation of the outer rotor by a brake operation mechanism 42 described later, reference numeral 40 denotes a stator-side brake disk mounted on the support shaft 30 via a support caliper 43, and reference numeral 41 denotes an inner periphery of the outer rotor frame 2. Brake disk installed on the rotor side, 4
2 is a brake operation that controls the rotation of the outer rotor by pressing the stator-side brake disk 40 from the side surface in the direction of the rotation axis when the brake coil 44 is activated, and bringing the stator-side brake disk 40 into contact with the rotor-side brake disk 41. Mechanism.

Next, the operation will be described. Conventional examples are
An outer rotor frame, which is a gearless type hoist that directly drives the sheave 1 and winds up an elevator. The rotating electric machine is made compact by using permanent magnets 3 and the permanent magnets 3 are combined with the sheave 1. 2 is an outer rotor type permanent magnet type gearless hoisting machine for elevators, which is disposed inside the inner rotor 2.

An outer rotor frame 2 connected to a rotor-side brake disk 41 couples the sheave 1 thereon and is driven by a permanent magnet 3 mounted inside the sheave 1 to form a gearless winding. 1 is driving the elevator.

A brake device 39 is mounted on the support shaft 30 via a brake portion support caliper 43 as a multi-disc disk brake device 39 having a brake device movable in the axial direction. By operating as a braking device between the stationary support shaft on the rotating side and the stator side, the rotation is braked.

[0010]

As described above, the outer rotor frame and the sheave are rotatably supported on the fixed shaft via the outer ring rotating load type bearing, and the rotating shaft can be removed from the supporting shaft. There was no structure. For this reason, when collecting a precision rotation detector of the type directly connected to the rotating shaft on the outer rotor type hoist, it must be mounted inside the support bearing, and to perform inspection and replacement work, the support shaft and the support bearing Has to be removed, and there is a disadvantage that the operation is very large and difficult. In addition, since the rotation detector has a large external shape and special shape, there is no marketability.
There is a disadvantage that the cost is high because it is ordered.

In addition, since the operation mechanism of the disc brake device is arranged inside the machine, it is very difficult to perform inspection and replacement work. In addition, the conventional outer rotor type permanent magnet type gearless hoisting machine for elevators does not have a hermetic structure such as watertightness and waterproofness.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a structure in which a solid shaft, which is a rotating shaft of an outer rotor, can be taken out of the machine while being an outer rotor type permanent magnet type. It is an object of the present invention to provide a gearless hoist for an elevator having a watertight and hermetically sealed structure in which a precision rotation detector or the like of a type directly connected to the vehicle can be attached, and the inspection and replacement of the brake device can be easily performed.

[0013]

According to the present invention, there is provided a gearless hoist for an elevator, wherein a first cantilever shaft is supported by a first bearing base and a gap is provided at one end of the first cantilever shaft. And a second cantilever shaft having a hollow hole, the other end side of which is cantilevered by a second bearing stand, and an outer periphery of the first cantilever shaft and an outer periphery of the second cantilever shaft. An outer rotor slidably supported and rotatable with respect to the first and second cantilever shafts, a permanent magnet mounted on an inner peripheral surface of the outer rotor, and a first cantilever shaft , An armature winding disposed opposite to the permanent magnet, a sheave formed on the outer rotor and rotating with the outer rotor, a first cantilever shaft and a second
A solid shaft fixed to the outer rotor through a gap formed between the second cantilever shaft and the other end of the second cantilever shaft. And a rotation detector connected to the solid shaft for detecting rotation of the solid shaft.

The length of the outer rotor in the direction of the rotation axis is longer than the diameter of the outer rotor.

The first cantilever shaft is a shaft having a hollow hole, and the solid shaft is slidably supported on the inner periphery of the first cantilever shaft.

Further, the length of the outer rotor in the direction of the rotation axis is shorter than the diameter of the outer rotor.

The first cantilever shaft is a shaft having a hollow hole, and a lead wire for energizing the armature winding is provided through the inside of the first cantilever shaft.

[0018] Also, provided inside the outer rotor,
It has a braking portion that brakes the rotation of the outer rotor by pressing the inner periphery of the outer rotor, and an inspection hole of the braking portion provided on the outer rotor.

Further, a first seal portion provided between the first cantilever shaft and the outer rotor, and a second seal portion provided between the first rotor and the second cantilever shaft.
A second seal portion provided between the cantilever shafts, and a seal cover that covers the hollow hole of the second cantilever shaft and the rotation detector at the other end of the second cantilever shaft. Things.

In addition, the radiating fin is provided on the outer periphery of the outer rotor.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a partial sectional view showing a gearless hoist for an elevator according to the present embodiment. In the figure, reference numeral 1 denotes a sheave on which a rope for suspending an elevator is wound.
It is supported rotatably.

An outer rotor frame 2 has one end adjacent to the sheave 1, that is, a frame connected in the longitudinal direction of the cantilever hollow shaft 10. The outer rotor frame 2 rotates and the sheave 1 Also rotate.

Reference numeral 3 denotes a permanent magnet provided on the inner peripheral surface of the outer rotor frame 2 in parallel with the cantilever hollow shaft 10;
Is a stator core mounted on the cantilever hollow shaft 10 so as to face the permanent magnet 3, and 5 is a stator coil as an armature winding for exciting the stator core 4, and is driven by the permanent magnet 3, the stator core 4, and the stator coil 5. Unit is configured.

Reference numeral 6 denotes a coil lead for supplying electricity to the stator coil 5 supported by the coil lead support 6a and a brake coil 9 described later. The coil lead 6 passes through the cantilever hollow shaft 10 and serves as a lead wire outlet seal. It is guided to the outside of the elevator gearless hoist via the support portion 24.

Reference numeral 7 denotes an inflatable brake which is operated by a brake core 8 and a brake coil 9. The inflatable brake 7 comprises a brake device as a braking unit constituted by the brake core 8 and the brake coil 9. I have. This brake device is positioned so as to be shifted from the drive unit in the distal direction of the cantilever hollow shaft 10. The brake device brakes the rotation by pressing the inner peripheral surface of the outer rotor frame 2.

Reference numeral 10 denotes a cantilever, one end of which is supported at one end by a sheave-side bearing stand 13 described later, protrudes along the rotation axis of the outer rotor frame 2, and has a hollow hole as a first cantilever shaft. Hollow shaft, 11 is a sheave-side outer ring rotational load bearing for rotatingly supporting the sheave 1 on the cantilever hollow shaft 10, and 12 is a first seal portion for keeping the sheave 1 and the cantilever hollow shaft 10 airtight. The sheave-side shaft seal 13 is a sheave-side bearing stand as a first bearing stand fixed to the base portion 20 and supporting the cantilever hollow shaft 10 in a cantilever manner.

An outer rotor frame support frame 14 is connected at one end to the other end of the outer rotor frame 2 and serves as a frame support frame for rotationally supporting an outer rotor frame support bearing-side hollow support shaft 17 described later.
5 is an outer rotor support bearing for rotating the outer rotor frame support frame 14 with respect to the outer rotor frame support bearing side hollow support shaft 17, and 16 is an outer rotor frame support frame 14 and an outer rotor frame support bearing side hollow support. An outer rotor frame supporting bearing side shaft seal as a second seal portion for keeping the shaft 17 airtight;
17 has one end facing the cantilever hollow shaft 10 with a gap,
Outer rotor frame side bearing stand 19 whose other end is described later
A hollow support shaft on the outer rotor frame support bearing side as a second cantilever shaft which is cantilevered and has a hollow hole, 18
Are fixed to the outer rotor via a gap formed between the cantilever hollow shaft 10 and the outer rotor frame support bearing side hollow support shaft 17, and the hollow hole of the outer rotor frame support bearing side hollow support shaft 17 is The outer rotor frame is a solid shaft that penetrates and is slidably supported on the inner periphery of the cantilever hollow shaft 10 as a solid shaft.

The outer rotor frame swing / rotation detector drive connecting shaft 18 is fixed to the other end of the outer rotor frame support frame 14 on the outer rotor frame support bearing side hollow support shaft 17 side between both ends. . Further, the outer rotor frame swing / rotation detector drive connecting shaft 18 is
One end protrudes so as to penetrate the outer rotor frame support bearing side hollow support shaft 17, a rotation detector 21 described later is installed at the tip, the other end protrudes into the cantilever hollow shaft 10, and the outer periphery of one end It is rotatable with respect to the cantilever hollow shaft 10 via an outer rotor frame vibration-reducing bearing 22 provided between the cantilever hollow shaft 10 and the inner peripheral surface of the cantilever hollow shaft 10. In other words, the outer rotor frame swing / rotation detector drive joint shaft 18 is the rotation shaft of the outer rotor.

The outer rotor includes a sheave 1, an outer rotor frame 2, and an outer rotor frame support frame 1.
4. That is, the outer rotor is slidably supported on the outer periphery of the cantilever hollow shaft 10 and the outer periphery of the outer rotor frame support bearing side hollow support shaft 17, and the cantilever hollow shaft 10 and the outer rotor frame support bearing side hollow support shaft 17. It is rotatable with respect to.

In this embodiment, the outer rotor is composed of the sheave 1, the outer rotor frame 2, and the outer rotor frame support frame 14, but they may be composed of the same member. .

Further, reference numeral 19 denotes an outer rotor frame-side bearing stand as a second bearing stand fixed to the base portion 20 and cantileverly supporting the outer rotor frame supporting bearing-side hollow support shaft 17, and 20 denotes an elevator gearless hoist. This is the base part to be installed.

Reference numeral 23 denotes a radiation fin provided on the outer periphery of the outer rotor frame 2, reference numeral 25 denotes a seal cover for covering the rotation detector 21, and reference numeral 26 denotes an inspection of a brake device provided on the outer rotor frame support frame 14. The internal inspection hole is made of a transparent member such as glass or plastic.

As described above, the outer rotor composed of the sheave 1, the outer rotor frame 2, and the outer rotor frame support frame 14 includes a sheave-side shaft seal 12, an outer rotor frame support bearing-side shaft seal 16, and a lead wire. The inside of the outer rotor is kept airtight by the outlet seal and support portion 24.

Although the interior of the outer rotor is hermetically sealed to store heat therein, heat is radiated by radiation fins 23 provided on the outer rotor frame 2.

The diameter of the outer rotor (length in the direction perpendicular to the rotation axis) is shorter than the length of the outer rotor (length in the direction parallel to the rotation axis).

Next, the operation will be described. When the stator coil 5 is energized, the stator core 4 is excited, and acts on the permanent magnet 3 installed on the inner periphery of the outer rotor frame 2 to rotate the outer rotor frame 2, that is, the sheave 1, to wind up and lower the rope. It is supposed to.

The outer rotor frame support frame 14
Is rotated in conjunction with the rotation detector driving splicing shaft 18, and the rotation is detected by the rotation detector 21.

As described above, since the outer rotor end is of the permanent magnet type, the rotating shaft end of the outer rotor can be taken out of the machine, so that a precision rotation detector directly connected to the rotating shaft can be easily inspected and replaced. Can be installed with As a result, accurate rotation detection can be performed without impairing maintenance workability, high-precision rotation control can be performed, and high-precision operation such as faster elevators and higher landing accuracy can be achieved. Can be realized. In addition, the outer shape of the rotation detector is small, which is marketable, and can reduce the cost.

Further, since the brake device is of an inwardly expanding type, the brake device is arranged beside the drive unit, and is further visible from the outside through an internal inspection hole 26 provided in the outer rotor frame support frame 14. Inspection and replacement of the brake device can be easily performed.

Further, since the brake device is arranged beside the drive unit, the diameter (direction perpendicular to the rotation axis) of the outer rotor can be made shorter than the length (length in the direction parallel to the rotation axis). . Therefore, when installing the elevator gearless hoist, the degree of freedom in the height direction of the hoistway can be increased.

Further, since one end of the outer rotor frame support bearing side hollow support shaft 17 is rotatably inserted into the cantilever hollow shaft 10 via the outer rotor frame anti-vibration bearing 22, the cantilever is provided. The deflection of the hollow shaft 10 can be suppressed, and more stable rotation can be obtained.

Further, the outer rotor type permanent magnet type elevator gearless hoisting machine enables a watertight sealing structure without impairing compactness, and further enables a cantilever hollow shaft steadying structure. Therefore, it is possible to increase the flexibility of the installation location, particularly, the reduction of the size of the machine room and the possibility of installing the elevator in the hoistway. In particular, when installing in a pit, if the water gets into the hoistway for some reason, the hoist may be submerged and it becomes impossible to operate the elevator. With this structure, the possibility of installing the hoist in the pit can be increased.

Further, since the radiation fins 23 are provided on the outer rotor frame 2, the internal heat can be easily dissipated even in a watertight and sealed structure. Further, since the lead wire of the armature winding is wired through the hollow hole of the cantilever hollow shaft 10, there is no need to provide a structure for separately passing the lead wire, and the cost can be reduced.

Embodiment 2 In the present embodiment, portions denoted by the same reference numerals as those in Embodiment 1 indicate the same or corresponding portions. FIG. 1 is a partial sectional view showing a gearless hoist for an elevator according to the present embodiment. In the figure, reference numeral 18 denotes a rotation detector driving splicing shaft as a solid shaft which is a rotating shaft of the outer rotor, and is formed between the cantilever hollow shaft 10 and the outer rotor frame supporting bearing side hollow supporting shaft 17. It is fixed to the outer rotor via a gap, and penetrates the hollow hole of the outer rotor frame support bearing side hollow support shaft 17.

One end of the rotation detector drive connecting shaft 18 projects so as to penetrate the outer rotor frame support bearing side hollow support shaft 17, and a rotation detector 21 described later is installed at the tip, and the other end is provided at the other end. Hollow support shaft 1 of outer rotor frame support frame 14 on the outer rotor frame support bearing side
7 is fixed to the other end.

The length of the outer rotor (length in the direction parallel to the rotation axis) is shorter than the diameter of the outer rotor (length in the direction perpendicular to the rotation axis).

Next, the operation will be described. When the stator coil 5 is energized, the stator core 4 is excited, and acts on the permanent magnet 3 installed on the inner periphery of the outer rotor frame 2 to rotate the outer rotor frame 2, that is, the sheave 1, to wind up and lower the rope. It is supposed to.

The outer rotor frame support frame 14
The outer hollow support shaft 17 connected to the outer rotor frame support bearing connected to the motor also rotates in conjunction with the rotation, and the rotation is detected by the rotation detector 21.

As described above, the structure is such that the end of the rotating shaft of the outer rotor can be taken out of the machine even though the outer rotor is a permanent magnet type, so that a precision rotation detector directly connected to the rotating shaft can be easily inspected and replaced. Can be installed with As a result, accurate rotation detection can be performed without impairing maintenance workability, high-precision rotation control can be performed, and high-precision operation such as faster elevators and higher landing accuracy can be achieved. Can be realized. In addition, the outer shape of the rotation detector is small, which is marketable, and can reduce the cost.

Further, since the rotation detector 21 is provided on the side wall of the outer rotor frame side bearing base 19, inspection and replacement work can be easily performed.

Further, since the brake device is of an inwardly expanding type, the brake device is disposed beside the drive unit, and is made visible from the outside through an internal inspection hole 26 provided in the outer rotor frame support frame 14. Inspection and replacement of the brake device can be easily performed.

Further, since the brake device is arranged beside the drive unit, the length of the outer rotor (length in a direction parallel to the rotation axis) can be reduced in diameter (direction perpendicular to the rotation axis). . Therefore, when installing the elevator gearless hoist, the degree of freedom in the horizontal direction of the hoistway can be increased.

Furthermore, the outer rotor type permanent magnet type gearless hoisting machine for elevators can be provided with a watertight and sealed structure without impairing compactness, and further, with a cantilever structure of the cantilever hollow shaft 10. . Therefore, it is possible to increase the flexibility of the installation location, particularly, the reduction of the size of the machine room and the possibility of installing the elevator in the hoistway. In particular, when installing in a pit, if the water gets into the hoistway for some reason, the hoist may be submerged and it becomes impossible to operate the elevator. With this structure, the possibility of installing the hoist in the pit can be increased.

In addition, since the cantilever hollow shaft 10 is shortened so that the outer rotor frame is not used, the cost can be reduced.

[0055]

According to the gearless hoist for an elevator of the present invention, the first cantilever shaft which is cantilevered by the first bearing stand is opposed to the first cantilever shaft with one end having a gap between the first cantilever shaft. The other end is cantilevered by the second bearing base, and is slidable on the second cantilever shaft having a hollow hole, the outer periphery of the first cantilever shaft and the outer periphery of the second cantilever shaft. An outer rotor supported and rotatable with respect to the first cantilever shaft and the second cantilever shaft, a permanent magnet attached to the inner peripheral surface of the outer rotor, and fixed to the first cantilever shaft; An armature winding disposed opposite to the permanent magnet, a sheave formed on the outer rotor and rotating with the outer rotor, and formed between the first cantilever shaft and the second cantilever shaft. A solid shaft fixed to the outer rotor through the gap and penetrating through the hollow hole of the second cantilever shaft, and the other end of the second cantilever shaft It is connected to the solid shaft Te, since those having a rotation detector for detecting rotation of the solid shaft, it is possible to mount the type of precision rotation detector is directly connected to the real axis in a of the outer rotor rotation axis.

Further, since the length of the outer rotor in the direction of the rotation axis is longer than the diameter of the outer rotor, the degree of freedom in the height direction can be increased at the time of installation.

The first cantilever shaft is a shaft having a hollow hole, and the solid shaft is slidably supported on the inner periphery of the first cantilever shaft. Can be suppressed.

Further, since the length of the outer rotor in the rotation axis direction is shorter than the diameter of the outer rotor, the degree of freedom of the hoistway in the horizontal direction can be increased when the outer rotor is installed.

The first cantilever shaft is a shaft having a hollow hole, and a lead wire for energizing the armature winding is provided through the inside of the first cantilever shaft. There is no need to have a structure.

[0060] Also, provided inside the outer rotor,
Since it has a brake unit that brakes the rotation of the outer rotor by pressing the inner periphery of the outer rotor, and an inspection hole of the brake unit provided on the outer rotor, it is easy to inspect and replace the disk brake device. Can do it.

Further, a first seal portion provided between the first cantilever shaft and the outer rotor,
A second seal portion provided between the cantilever shafts, and a seal cover that covers the hollow hole of the second cantilever shaft and the rotation detector at the other end of the second cantilever shaft. Therefore, a closed structure such as watertightness and waterproofness can be obtained.

Further, since it has the radiating fins 23 provided on the outer periphery of the outer rotor, the internal heat can be easily radiated even in a hermetically sealed structure such as watertight or waterproof.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an elevator gearless hoist according to a first embodiment.

FIG. 2 is a partial sectional view showing an elevator gearless hoist according to a second embodiment.

FIG. 3 is a partial sectional view showing a conventional elevator gearless hoist.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 sheave, 2 outer rotor frame, 3 permanent magnet, 4 stator core, 5 stator coil, 6 coil lead, 6a coil lead support, 7 internal expansion brake, 8 brake core, 9 brake coil, 10 cantilever hollow shaft, 11 Sheave-side outer ring rotational load bearing, 12 Sheave-side shaft seal, 13 Sheave-side bearing stand, 14 Outer rotor frame support frame, 15 Outer rotor support bearing, 1
6 Outer rotor frame support bearing side shaft seal, 17
Outer rotor frame support bearing side hollow support shaft, 18
Outer rotor frame stabilization and rotation detector drive joint shaft, 19 outer rotor frame side bearing stand, 20 base part, 21 rotation detector, 22 outer rotor frame stabilization bearing, 23 heat radiation fin, 24 lead wire outlet seal and support Part, 25 seal cover, 26 internal inspection hole, 30 support shaft, 31 overall support bearing frame, 32 outer ring rotating load type bearing, 33 first fastening part, 34 stator core support bolt, 35 second fastening part, 36 third , 37 Motor air gap, 38 Coil lead duct, 39 Brake device, 40 Stator side brake disk, 41 Rotor side brake disk, 42
Brake operating mechanism, 43 Support caliper, 44 Brake coil.

Claims (8)

[Claims] 1. A first cantilever shaft, which is cantilevered by a first bearing stand, has one end facing the first cantilever shaft with a gap, and the other end facing a second bearing stand. A second cantilever shaft having a hollow hole, and a slidably supported outer periphery of the first cantilever shaft and an outer periphery of the second cantilever shaft; An outer rotor rotatable with respect to a cantilevered shaft and the second cantilevered shaft, a permanent magnet attached to an inner peripheral surface of the outer rotor, and a permanent magnet fixed to the first cantilevered shaft; An armature winding disposed oppositely, a sheave formed on the outer rotor, rotating with the outer rotor, and formed between the first cantilever shaft and the second cantilever shaft; A solid shaft that is fixed to the outer rotor through a gap formed through the hollow hole of the second cantilever shaft, A rotation detector connected to the solid shaft at the other end of the cantilever shaft and detecting rotation of the solid shaft. 2. The elevator gearless hoist according to claim 1, wherein a length of the outer rotor in a rotation axis direction is longer than a diameter of the outer rotor. 3. The first cantilever shaft is a shaft having a hollow hole, and the solid shaft is slidably supported on an inner periphery of the first cantilever shaft. 3. The elevator gearless hoist according to claim 1 or claim 2. 4. The elevator gearless hoist according to claim 1, wherein a length of the outer rotor in a rotation axis direction is shorter than a diameter of the outer rotor. 5. The first cantilever shaft is a shaft having a hollow hole, and a lead wire for energizing the armature winding is connected to the first cantilever shaft.
The gearless hoist for an elevator according to any one of claims 1 to 4, wherein the hoist is provided through the interior of the cantilever shaft. 6. An outer rotor provided inside the outer rotor,
The brake device according to claim 1, further comprising a brake unit configured to brake the rotation of the outer rotor by pressing an inner circumference of the outer rotor, and an inspection hole of the brake unit provided in the outer rotor. A gearless hoist for an elevator according to any one of claims 5 to 10. 7. A first seal portion provided between said first cantilever shaft and said outer rotor, and a second seal provided between said second cantilever shaft and said outer rotor. And a seal cover for covering the hollow hole of the second cantilever shaft and the rotation detector at the other end side of the second cantilever shaft. Item 7. A gearless hoist for an elevator according to any one of Items 6. 8. The gearless hoist for an elevator according to claim 1, further comprising a heat radiating fin provided on an outer periphery of the outer rotor.