JP2017100860A - Hoist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily decomposable/assembleable hoist.SOLUTION: A strut 9 is inserted into an open hole 2a of a traction sheave 2 including bearings 3, 4. The strut 9 is supported by the bearings 3, 4. Both ends of the strut 9 are fitted and combined with a brake stand 14 and a motor stand 17. The brake stand 14 and the motor stand 17 are fixed to a bed 22. A rotor 11 provided on the edge face of the traction sheave 2 and a stator 18 provided on the motor stand 17 are concentrically arranged.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gearless hoisting machine using a permanent magnet type synchronous motor used for an elevator or the like.

Elevator hoisting machines are required to have a long life span of several decades, equivalent to buildings. However, since the hoisting machine works to support a large load and move up and down, wear of sliding parts and deterioration of resin parts cannot be avoided, and replacement and repair of parts is faster than the building life. May be required.
Since the hoisting machine is usually installed in the elevator machine room that is further above the top floor of the building, the hoisting machine that is an assembly can be taken out of the elevator machine room after the building is in operation. In many cases, it cannot be carried into the elevator machine room. Therefore, it is required to replace or repair parts in the elevator machine room.

When exchanging or repairing parts in the elevator machine room, carry parts to and from parts and equipment using the existing elevator to the top floor, and use a chain block etc. from the top floor to the elevator machine room. The method of carrying is generally performed. Accordingly, the size and weight of the parts to be replaced and the instruments are limited. In addition, since the elevator cannot be used during the repair, it is necessary to finish the replacement and repair in as short a time as possible to shorten the stop time.
In particular, high-speed, large-capacity hoisting machines are large in size and weight, and the size and weight of the parts to be replaced and the necessary equipment may exceed the limit on the loadable dimensions and weight of the elevator. There is a need for a hoisting machine capable of disassembling and assembling in as little parts as possible in a room.

The following prior arts are available for such a need.
Prior art relating to the structure of a hoisting machine devised so that the drive sheave can be easily replaced (Japanese Patent Laid-Open No. 2004-1007048: Patent Document 1).
Prior art relating to the structure of a hoisting machine devised to facilitate maintenance work of the rotation detector (Japanese Patent Laid-Open No. 9-263367: Patent Document 2).

JP 2004-1007048 A JP-A-9-263367

  Although there are prior arts shown in Patent Documents 1 and 2 as described above, there are still remaining problems. Of these, the problems to be addressed by the present invention are shown below.

(1) Centering work is required in the assembly process.
(1-1) With respect to the prior art of Patent Document 1.
In the prior art shown in Patent Document 1, a stator is fixed to a housing, a rotor is fixed to a driving sheave integrated with a shaft, and the shaft is supported by a housing and a bearing base via a bearing. Since it is tilted by a certain amount, the shaft center of the housing and the bearing stand is tilted freely by a certain amount with respect to the shaft center (rotation center of the shaft) and is not fixed.
Therefore, in the state of being attached to the bed, the shafts, housings, and bearing bases are misaligned due to gaps between the bolts and mounting holes, parts machining errors, etc. An unbalance of the motor gap occurs.
If the motor gap is unbalanced, motor characteristics will deteriorate and vibration and noise problems will occur. To prevent this, the shaft center, shaft and housing shafts must be offset within the allowable range. Centering work is required. This operation is performed by trial and error by repeating measurement and correction, and there is a problem that experience and skill are required, the number of workers is limited, and considerable time is required.

(1-2) For the prior art of Patent Document 2.
The prior art shown in Patent Document 2 has a structure in which both ends of a shaft (corresponding to a support column of the present invention) are supported by a pedestal, and a stator (armature) is fixed to an armature fixing member integrated with the pedestal. Here, there is a gap between the fitting portion of the shaft and the pedestal, and the length of the fitting portion is significantly shorter than the length of the armature core (about 1/3 in the drawing of Patent Document 2), so the pedestal with respect to the shaft center Inclination occurs.
Therefore, a centering operation for correcting the inclination within the allowable value is necessary. Since this work is performed by trial and error by repeating measurement and correction, there is a problem that experience and skill are required, the number of workers is limited, and considerable time is required.

(2) It is difficult to disassemble and assemble the drive sheave and the shaft (relative to the prior art of Patent Document 1).
When exchanging a drive sheave that has reached the wear limit, it is likely that the weight and dimensions will exceed the existing elevator load limit when transporting with the drive sheave and shaft integrated. It is necessary to disassemble and assemble the drive sheave and shaft in the elevator machine room. Since the driving sheave and the shaft need to rotate together without slipping while receiving a large shaft load, the driving sheave and the shaft are firmly fastened by “an interference fit” or the like, and a strong force is required for pulling out.
Therefore, a large apparatus such as a hydraulic device or a gas burner is required for the disassembling / assembling work, and there is a problem in that it takes time for disassembling / assembling, lengthening the stop time of the elevator, and increasing costs. In addition, there is a danger of using fire in a small place.

(3) It is difficult to disassemble the stator and the rotor (relative to the prior arts of Patent Documents 1 and 2).
In a motor that uses permanent magnets, when it is necessary to disassemble the stator and rotor due to component replacement, repair, etc., when the stator and rotor are pulled out in the axial direction, a large axial attractive force acts between them. A large pulling force is needed to overcome
In addition, if the shaft center is misaligned between the cylindrical stator and the cylindrical rotor during disassembly, a large radial suction force (unbalanced pull) acts between the two, and in the worst case the stator And the rotor may stick together, making it impossible to disassemble. Therefore, during disassembly, the center misalignment of both axes is kept as small as possible, the radial suction force is reduced, and even if a large radial suction force due to misalignment occurs, there is no problem with bending of the jig It is necessary to keep it down. Therefore, when disassembling (separating) the stator and the rotor, generally, a large extraction jig and a large and high-performance lifting equipment capable of transporting, installing and using these are required.
However, the elevator machine room has limited working space and restrictions on the size and weight of equipment that can be carried in, so it is often impossible to prepare equipment with sufficient functions. In some cases, the stator and rotor may not be disassembled and assembled in the elevator machine room.

(4) The drive-side gear for the encoder (equivalent to a rack in the prior art) becomes enormous and costs increase (relative to the prior art in Patent Document 2).
The prior art of Patent Document 2 has a structure in which an encoder drive side gear (rack) is attached to the outer diameter side of a rotor integrally formed with a drive sheave, and a huge gear is required. Further, the drive side gear needs to accurately transmit the rotation of the hoisting machine to the encoder, and accordingly, high precision is required. The prior art of Patent Document 2 has a structure in which separate parts of racks are attached to the outer diameter of the rotor to form a drive-side gear, and continuity is disturbed at the joints, so an auxiliary encoder is necessary.
Since the structure is complicated and the control is complicated as described above, there is a concern about reliability. In addition, there is a disadvantage that the cost becomes high.

(5) Since the shape and size of the motor are limited and the motor is limited to a small-capacity motor, the range that can be used for the elevator is narrow (relative to the prior art of Patent Document 2).
In the prior art of Patent Document 2, a sheave is integrally formed on the outer diameter side of the rotor (rotor), and the stator (stator) needs to be arranged on the inner side facing the rotor. Limited. In addition, the sheave has a function of suspending elevator cars and ropes and driving up and down to support a large load, so that the sheave is thick to ensure a suitable strength. Since the motor is disposed on the inner diameter side of the sheave, the outer diameter is limited. In addition, since the length of the motor is limited within the length of the sheave, the size of the motor is limited, so the motor output is also limited, and the capacity of the motor is smaller than the size of the sheave. Become.
Therefore, in particular, in a high-speed and large-capacity hoisting machine in which the present invention exhibits a great effect, there is a problem that the usable range is limited and becomes narrow.

(6) The rotor and sheave are integrally formed, and the replacement cost is high (relative to the prior art of Patent Document 2).
In the prior art of Patent Document 2, when the drive sheave needs to be replaced due to wear of the main connecting groove or the like, the rotor formed integrally with the drive sheave is also replaced, resulting in waste. On the other hand, when it is necessary to replace the rotor due to demagnetization of the magnet, the driving sheave formed integrally with the rotor is also replaced, resulting in waste. Therefore, there is a problem that the replacement cost becomes high.
In addition, since the weight of one part becomes heavy, there is a problem that the replacement becomes very difficult due to the problem of carrying in / out, the replacement cost is increased, and the time required for the replacement becomes long.

  An object of the present invention is to provide a small and lightweight hoisting machine that is easy to disassemble and assemble and does not require a centering operation in an assembling process.

The present invention for solving the above problems
A drive sheave in which a through hole penetrating in the axial direction is formed in the central portion in the radial direction, and one end portion and the other end portion of the through hole are respectively boss portions,
A bearing on one end side disposed on the boss portion of the one end portion and a bearing on the other end side disposed on the boss portion on the other end portion;
At the one end portion in the axial direction, the diameter decreases in a step shape as it goes from the central portion toward one end side, and at the other end portion in the axial direction, the diameter decreases in a step shape as it goes from the central portion toward the other end side, It is inserted into the through hole of the driving sheave, the small diameter portion of the one end portion is supported by the bearing on the one end side, and the portion near the other end portion of the central portion is supported by the bearing on the other end side. Struts,
A rotor provided with a permanent magnet and attached to the other end surface of the sheave in a concentric state with respect to the drive sheave;
A brake stand having a through hole fitted with a small diameter portion of one end of the support;
A motor stand including a through hole fitted with a small diameter portion of the other end portion of the support column, and a stator arranged concentrically with respect to the rotor;
A lower part of the brake stand and a bed to which the lower part of the motor stand is bolted are characterized.

The present invention also provides
At one end portion of the support column, the first small-diameter portion adjacent to the central portion and the second small-diameter portion adjacent to the first small-diameter portion are formed by decreasing the diameter from the central portion toward the one end side. Has been
The first small diameter portion is supported by the bearing on the one end side,
The second small diameter portion is fitted in the through hole of the brake stand.

The present invention also provides
The one end side bearing is disposed by a clearance fit on the one end portion boss portion, and the other end side bearing is disposed by a clearance fit on the other end portion boss portion,
A small diameter portion of one end portion of the support column is fitted into the through hole of the brake stand by a clearance fit,
The small diameter part of the other end part of the said support | pillar is fitted by the clearance fit to the through-hole of the said motor stand, It is characterized by the above-mentioned.

The present invention also provides
The one end side bearing is clamped and fixed between one end side bearing cover bolted to one end surface of the driving sheave and the driving sheave while being in contact with one end surface of the bearing. And
The bearing on the other end side is sandwiched between the bearing sheave on the other end side bolted to the other end surface of the drive sheave and the drive sheave while being in contact with the other end surface of the bearing. Fixed,
The brake stand is clamped and fixed between a support plate on one end side that is bolted to one end surface of the support column in contact with the one end surface of the brake stand, and the support column.
The motor stand is clamped and fixed between a support plate on the other end side bolted to the other end surface of the support column and the support column in contact with the other end surface of the motor stand. Features.

The present invention also provides
The rotor is arranged on the inner peripheral side of the stator.

The present invention also provides
The rotor is arranged on the outer peripheral side of the stator.

The present invention also provides
A screw hole formed in a surface of the motor stand facing the rotor,
A tension bolt for fixing the rotor and the motor stand integrally is provided by screwing into the screw hole from the outside of the motor stand and abutting the tip with the rotor.

The present invention also provides
A drive gear fixed to the bearing cover on the one end side in a concentric state with the drive sheave;
An encoder fixed to the brake stand;
An encoder structure comprising a driven gear attached to the rotary shaft of the encoder and meshed with the drive gear is provided.

  According to the hoisting machine of the present invention, disassembly / assembly is easy, the work time of disassembly / assembly can be shortened, and further reduction in size and weight can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the winding machine which concerns on Example 1 of this invention, and shows it partially fractured | ruptured. The right view which shows the winding machine which concerns on Example 1 of this invention. The left view which shows the winding machine which concerns on Example 1 of this invention. The front view which shows the disassembled state of the winding machine which concerns on the Example of this invention, and shows it partially fractured | ruptured. AA sectional drawing of FIG. The BB arrow line view of FIG. The front view which shows the disassembled state of the winding machine which concerns on the Example of this invention, and shows it partially fractured | ruptured. CC sectional drawing of FIG. The front view which shows the disassembled state of the winding machine which concerns on the Example of this invention, and shows it partially fractured | ruptured. The front view which shows the disassembled state of the winding machine which concerns on the Example of this invention, and shows it partially fractured | ruptured. The front view which shows the disassembled state of the winding machine which concerns on the Example of this invention, and shows it partially fractured | ruptured. The front view which shows the disassembled state of the winding machine which concerns on the Example of this invention, and shows it partially fractured | ruptured. The winding machine which concerns on Example 3 of this invention is shown, (a) is a partially broken front view, (b) is a left view. The winding machine which concerns on Example 3 of this invention is shown, (a) is a partially broken front view, (b) is a left view. The front view which shows the disassembled state of the winding machine which concerns on Example 3 of this invention, and shows it partially fractured | ruptured. The front view which shows the winding machine which concerns on Example 4 of this invention, and shows it partially fractured | ruptured. The left view which shows the winding machine which concerns on Example 4 of this invention. The winding machine which concerns on Example 4 of this invention is shown, (a) is a partially broken front view, (b) is a left view. The winding machine which concerns on Example 4 of this invention is shown, (a) is a partially broken front view, (b) is a left view. The front view which shows the winding machine which concerns on Example 5 of this invention, and shows it partially fractured | ruptured. The right view which shows the winding machine which concerns on Example 5 of this invention.

  Hereinafter, the hoist according to the present invention will be described in detail based on examples.

[Example 1]
A hoisting machine 1 according to a first embodiment of the present invention will be described in accordance with an assembling procedure with reference to FIGS. 1 is a partially broken front view, FIG. 2 is a right side view, and FIG. 3 is a left side view.

In the driving sheave 2 of the hoisting machine 1, a through hole 2a that penetrates in the axial direction is formed in the central portion in the radial direction. One end portion (right end portion) of the through hole 2a is a boss portion 2b, and the other end portion (left end portion) of the through hole 2a is a boss portion 2c. That is, the inner diameters of the boss portions 2b and 2c formed at both end portions of the through hole 2a are larger than the inner diameter of the central portion in the axial direction of the through hole 2a.
A winding groove 2d for winding the main rope is formed on the outer peripheral surface of the drive sheave 2.

  The bearing 3 is disposed on the boss 2b, and the bearing 4 is disposed on the boss 2c. In this example, the radial dimensions of the bearing 3 and the bearing 4 are different, and the inner diameter of the inner ring of the bearing 3 is smaller than the inner diameter of the inner ring of the bearing 4.

  The bearing cover 5 is bolted to one end surface (right end surface) of the driving sheave 2 by the bolt 6 in a state where the outer ring of the bearing 3 is pressed from one end side (right end side) to the other end side (left end side). Fix it. As a result, the outer ring of the bearing 3 is clamped and fixed between the bearing cover 5 and the drive sheave 2. As a result, the bearing 3 is attached to the drive sheave 2.

  With the bearing cover 7, the outer ring of the bearing 4 is pressed from the other end side (left end side) to the one end side (right end side), and the bearing cover 7 is bolted to the other end face (left end face) of the drive sheave 2 by the bolt 8. Fix it. As a result, the outer ring of the bearing 4 is sandwiched and fixed between the bearing cover 7 and the drive sheave 2. As a result, the bearing 4 is attached to the drive sheave 2.

The pillar 9 is a cylindrical member when roughly speaking. The shape of the column 9 will be described in detail. One end portion (right end portion) has a small diameter in a step shape twice in this example as it goes from the center portion 9a toward one end side with respect to the diameter of the central portion 9a in the axial direction. The first small diameter portion 9b adjacent to the center portion 9a and the second small diameter portion 9c adjacent to the first small diameter portion 9b are formed by the step-shaped small diameter portion. Further, the other end portion (left end portion) of the column 9 has a small diameter in a step shape once in this example from the central portion toward the other end side, and the third small diameter portion 9d is formed by the step-shaped small diameter portion. Is formed. It should be noted that the number of times the diameter decreases in a step shape is not limited to the above number.
Here, the diameter of each part of the support | pillar 9 becomes small in order of the center part 9a, the 3rd small diameter part 9d, the 1st small diameter part 9b, and the 2nd small diameter part 9c.

The support column 9 having such a shape is inserted into the through hole 2a of the drive sheave 2 along the direction from the bearing 4 to the bearing 3 with the second small diameter portion 9c at the head. If it does so, the step part of the center part 9a and the 1st small diameter part 9b will contact | abut to the inner ring | wheel of the bearing 3, and insertion is completed. In this state, the first small-diameter portion 9 b of the support column 9 is tightly fitted to the inner ring of the bearing 3, and the portion near the other end of the central portion 9 a of the support column 9 is tightly fitted to the inner ring of the bearing 4. In addition, the axial direction dimension of the bearing 3 and the axial direction dimension of the 1st small diameter part 9b correspond.
In this way, the support 9 is supported by the inner ring of the bearing 3 and the inner ring of the bearing 4. In this case, the fitting between the inner ring of the bearing 3 and the inner ring of the bearing 4 and the support column 9 is a clearance fit. The clearance due to the clearance fitting is a minimum necessary clearance that does not cause a detrimental axial misalignment due to the clearance and that allows the support column 9 to be pulled out from the bearings 3 and 4.

The brake disc 10 is fixed to one end face (right end face) of the drive sheave 2 with a bolt or the like. Note that the brake disc 10 can be manufactured integrally with the drive sheave 2. The brake disc 10 is a disc of a braking device (not shown) mounted on a brake stand 14 described later.
Here, the brake device is an example of a disc brake device, but when the brake device is a drum brake device, a brake drum is attached instead of the brake disc 10.

  A permanent magnet 12 is fixed to the outer peripheral surface of the rotor 11. In this way, the rotor 11 to which the permanent magnet 12 is fixed is bolted to the other end surface (left end surface) of the drive sheave 2 with a bolt 13. At this time, the rotor 11 is fixed to the drive sheave 2 by making the axis of the rotor 11 coincide with the axis of the drive sheave 2.

  A through hole 14 a is formed in the brake stand (stand on one end side) 14. The through hole 14a has an inner diameter that allows the second small diameter portion 9c having a cylindrical shape to be closely fitted.

  The second small diameter portion 9 c of the support column 9 is inserted into the through hole 14 a of the brake stand 14. That is, the columnar second small diameter portion 9c is fitted into the through hole 14a which is a cylindrical hole. With the presser plate 15 pressed against one end surface (right end surface) of the brake stand 14 in the fitted state as described above, the presser plate 15 is bolted to one end surface (right end surface) of the support column 2 with a bolt 16. Thereby, the brake stand 14 and the bearing 3 are clamped and fixed between the pressing plate 15 and the support column 9. At this time, the other end surface (left end surface) of the brake stand 14 is in contact with one end surface (right end surface) of the inner ring of the bearing 3, and the other end surface (left end surface) of the inner ring of the bearing 3 is in contact with the central portion 9a and the first small diameter. It abuts on the stepped portion of the portion 9b.

As described above, when the second small diameter portion 9c of the support column 9 is fitted and combined with the through hole 14a of the brake stand 14, the inclination of the brake stand 14 with respect to the axis of the support column 9 is automatically determined in advance. The gap of the fitting part (gap between the second small diameter part 9c and the through hole 14a) and the length of the fitting part (the length of the second small diameter part 9c and the through hole 14a in the axial direction so as to be within the allowable range. ) Is set in advance.
In this case, the radial fitting of the support 9 to the brake stand 14 is a clearance fit. The gap due to the gap fitting is a minimum necessary gap that allows the column 9 to be smoothly inserted into and removed from the brake stand 14.

A through hole 17 a is formed in the motor stand (stand on the other end side) 17. The through hole 17a has an inner diameter that allows the third small diameter portion 9d having a cylindrical shape to be closely fitted.
A stator 18 is attached to the motor stand 17. At this time, the stator 18 is fixed to the motor stand 17 so that the axis of the stator 18 and the axis of the through hole 17a of the motor stand 17 coincide.

  The third small diameter portion 9 d of the support 9 is inserted into the through hole 17 a of the motor stand 17. That is, the columnar third small diameter portion 9d is fitted into the through hole 17a which is a cylindrical hole. With the presser plate 19 pressed against the other end surface (left end surface) of the motor stand 17 in the fitted state, the presser plate 19 is bolted to the other end surface (left end surface) of the support column 2 with the bolt 20. As a result, the motor stand 17 is sandwiched and fixed between the presser plate 19 and the support column 9. At this time, one end surface (right end surface) of the motor stand 17 is in contact with the step portion of the central portion 9a and the third small diameter portion 9d. Note that a gap may be provided between the one end surface (right end surface) of the motor stand 17 and the stepped portion of the central portion 9a and the third small diameter portion 9d.

Thus, when the third small diameter portion 9d of the support column 9 is fitted and combined with the through hole 17a of the motor stand 17, the inclination of the motor stand 17 with respect to the axis of the support column 9 is automatically determined in advance. The gap of the fitting portion (the gap between the third small diameter portion 9d and the through hole 17a) and the length of the fitting portion (the length of the third small diameter portion 9d and the through hole 17a in the axial direction so as to be within the allowable range. ) Is set in advance.
In this case, the support 2 and the presser plate 19 are fitted to the motor stand 17 with a clearance fit in both the radial direction and the axial direction. The gap due to the gap fitting is a minimum necessary gap that does not cause harmful misalignment due to the gap and can be smoothly inserted and removed.

  The motor stand 17 and the inner peripheral surface of the stator 11 are maintained on a predetermined gap while their axial centers are on the same axis and the axial positions of the two are aligned. Is arranged.

  The lower part of the brake stand 14 is fixed to the bed 22 with bolts 21, and the lower part of the motor stand 17 is fixed to the bed 22 with bolts 23.

Next, the operation and operation of the hoist 1 having the above configuration will be described.
In this hoisting machine 1, the rotor 11 is fixed to the drive sheave 2 so that the axes coincide with each other, the outer rings of the bearings 3 and 4 are fixed to the boss portions 2b and 2c on the inner diameter side of the drive sheave 2, and the bearing Since the support 9 is supported by the 3 and 4 inner rings, the shafts of the drive sheave 2, the rotor 11, and the support 9 coincide.
The stator 18 is fixed to the motor stand 17 so that the axial centers thereof coincide with each other, and the through hole 17a of the motor stand 17 and the third small-diameter portion 9d of the column 9 are fitted and joined. The axis of the stator 18 is aligned with the axis of the support column 9.
Therefore, the axial centers of the rotor 11 and the stator 18 coincide.
Further, in the assembled state, a predetermined gap is maintained between the outer peripheral surface of the rotor 11 and the inner peripheral surface of the stator 18, and the axial positions of the two coincide to form a motor.

Since the brake stand 14 and the motor stand 17 are fixed to the bed 22, the column 9 fixed to both the stands 14 and 17 is also fixed and does not rotate.
On the other hand, the drive sheave 2 is supported by the support column 9 via the bearings 3 and 4 and is thus rotatable. Further, since the rotor 11 and the disk 10 are fixed to the driving sheave 2, the rotor 11 and the disk 10 rotate together with the driving sheave 2.
Here, since the rotor 11 is fixed to the drive sheave 2, the rotational torque generated by the rotor 11 is directly transmitted to the drive sheave 2. That is, the torque transmission path from the rotor 11 to the drive sheave 2 is short.
Further, since the brake disc 10 is fixed to the drive sheave 2, the braking torque is directly transmitted to the drive sheave 2.

In the first embodiment, the rotor 11 is fixed to the driving sheave 2 so that the axes coincide with each other, and the support column 9 inserted through the through hole 2a of the driving sheave 2 is attached to the boss portions 2b and 2c of the driving sheave 2. The motor stand 17 and the brake stand 14 are mounted by fitting the cylindrical shaft and the cylindrical hole on the same axis as the support column 9 and coaxially with the column 9, and the gap and length of the fitting portion are set appropriately. By restricting the inclination of the column 9 with respect to the axis, both can be mounted concentrically with the column 9 simply by assembling.
Further, since the stator 18 attached to the motor stand 17 and the rotor 11 are automatically concentric, no centering work is required. Therefore, disassembly and assembly are easy, and the working time can be shortened.

  In addition, by eliminating the rotating shaft and making it a non-rotating column 9, it is not necessary to have a strong fastening by a tight fit between the drive sheave and the shaft, which is necessary in the prior art, so even in the machine room, Easy to disassemble and assemble. In addition, it is compact and lightweight because there is no strong fastening part due to interference fit, etc., and the strut that receives only bending stress (the present invention) has a lower strength burden than the shaft that receives rotational bending stress (prior art). The cost can be reduced.

[Example 2]
A jig used when disassembling and assembling the hoisting machine 1 of the first embodiment and a method of disassembling and assembling will be described as a second embodiment.

  In order to disassemble and assemble the hoist 1, a manual jack 30 (see FIG. 4), a pulling jig 40 (see FIG. 4), and a column guide 50 (see FIGS. 10 and 11) are used.

The manual jack 30 includes a jack base 31, a jack body 32, and jack bolts 33 (see FIG. 4).
The jack base 31 is a flat member, and the jack body 32 is disposed on the jack base 31. The jack main body 32 has a screw hole 32a. When the jack main body 32 is disposed on the jack base 31, the screw hole 32a penetrates in the vertical direction (vertical direction). The jack bolt 33 is screwed into the screw hole 32a from the upper side of the jack body 32 toward the lower side. When the jack bolt 33 is further screwed in a state where the tip (lower end) of the jack bolt 33 is in contact with the jack base 31, the jack body 32 moves upward from the jack base 31.

The drawing jig 40 has a guide collar 41, a drawing plate 42, a mounting bolt 43, and a drawing bolt 44 (see FIG. 4).
The outer diameter of the guide collar 41 is the same as the outer diameter of the third small diameter portion 9 d of the support column 9. The guide collar 41 is attached to the other end surface (left end surface) of the third small diameter portion 9d with a bolt. The outer diameter of the drawing plate 42 is larger than the outer diameter of the guide collar 41. A screw hole 42 a into which the extraction bolt 44 can be screwed is formed at the radial center of the extraction plate 42. The drawing plate 42 is attached to the motor stand 17 by means of mounting bolts 43.

The axial length L1 of the guide collar 41 is set to a length that satisfies the following expression.
L1 + L2> L3 + L4
Here, L2 is the axial length of the third small diameter portion 9d, and L3 is the axial length of the stator 18 (= the axial length of the permanent magnet 12) (see FIG. 4). L4 is a length in which the stator 18 is separated in the axial direction with respect to the rotor 11 and no magnetic attraction force is generated between them (see FIG. 7).

The column guide 50 includes a holder guide 51 and a column holder 52 (see FIGS. 10 and 11).
The holder guide 51 is schematically a cylindrical member. A hole 51a is formed on one end side (right end side), and the other end side (left end side) is connected to one end surface (right end surface) of the drive sheave 2 by a bolt. It is bolted. The inner diameter of the hole 51 a is equal to the inner diameter of the inner ring of the bearing 3.
The column holder 52, which is a cylindrical member, has an outer diameter that can be inserted into the holder guide 51 in a state in which the column holder 52 is tightly fitted in the hole 51 a of the holder guide 51 and is tightly fitted in the inner ring of the bearing 3. The support holder 52 has an inner diameter that allows the second small diameter portion 9c of the support 9 to be closely fitted. The inner diameter of the support holder 52 is smaller than the outer diameter of the first small diameter portion 9b.

  An example of a procedure for disassembling / assembling the hoisting machine 1 in the elevator machine room when parts need to be replaced or repaired will be described with reference to FIGS. Here, the details of the disassembly procedure will be described. Since the assembly procedure is the reverse procedure of disassembly, the description thereof is omitted.

<Disassembly step 1>
The decomposition process 1 will be described with reference to FIGS. 4 is a partially broken front view, FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, and FIG. 6 is a view taken along the line BB in FIG.

The jack base 31 is disposed on the bed 22 and the jack base 31 is positioned below the driving sheave 2.
The jack body 32 is placed on the jack base 31.
Screw the jack bolt 33 into the screw hole 32a of the jack body 32 and attach it.
-Loosen the bolt 20 and remove the presser plate 19 from the column 9.
The guide collar 41 is concentric with the column 9 and the guide collar 41 is fixed to the other end surface (left end surface) of the column 9 with the bolt 20.
The drawing plate 42 is fixed to the motor stand 17 with the mounting bolts 43 with the drawing plate 42 in contact with the other end surface (left end surface) of the guide collar 41.
-The extraction bolt 44 is screwed into the screw hole 42a of the extraction plate 42 and attached.

<Decomposition process 2>
The decomposition step 2 will be described with reference to FIGS. 7 is a partially broken front view, and FIG. 8 is a cross-sectional view taken along the line CC in FIG.

-The bolt 21 is loosened to bring the brake stand 14 fixed to the bed 22 into a free (unlocked) state. The bolt 23 is loosened so that the motor stand 17 fixed to the bed 22 is in a free (unlocked) state.
-By screwing the jack bolt 33 into the screw hole 32a of the jack body 32, the jack body 32 is moved upward. The jack main body 32 that has moved upward supports the driving sheave 2 from below, and causes the entire hoist 1 (except the bed 22) to float from the bed 22.
While the motor stand 17 is suspended by a chain block (not shown), the extraction bolt 44 is screwed into the screw hole 42a of the extraction plate 42, and the leading end surface (right end surface) of the extraction bolt 44 is connected to the other end surface (left end) of the guide collar 41. The surface). In this state, when the extraction bolt 44 is further screwed in, the extraction plate 42 moves away from the guide collar 41. When the extraction plate 42 moves in this way, the motor stand 17 fixed to the extraction plate 42 via the mounting bolt 43 slides along the column 9 and is extracted from the column 9.

<Decomposition process 3>
The decomposition step 3 will be described with reference to FIG. FIG. 9 is a front view showing an exploded state.

-Loosen the bolt 13 and remove the rotor 11 from the drive sheave 2.
-Loosen the bolt 8 and remove the bearing cover 7 from the drive sheave 2.
Loosen the bolt 16 and remove the presser plate 15 from the support 9 and the brake stand 14.
-The brake stand 14 is moved in the axial direction along the column 9 and pulled out from the column 9.
Loosen the bolt 6 and remove the bearing cover 5 from the drive sheave 2.

<Decomposition process 4>
The decomposition process 4 will be described with reference to FIG. FIG. 10 is a front view showing an exploded state.

The holder guide 51 of the column guide 50 is attached to one end surface (right end surface) of the driving sheave 2 with the bolt 6.
Insert the column holder 52 into the hole 51 a of the holder guide 51. Further, the column holder 52 is pushed in, and the tip end portion (left end portion) of the column holder 52 is brought into contact with the step portion of the first small diameter portion 9b and the second small diameter portion 9c of the column 9. At this time, the second small diameter portion 9 c is held on the inner peripheral surface of the column holder 52.

<Disassembly step 5>
The decomposition process 5 is demonstrated with reference to FIG. FIG. 11 is a front view showing a disassembled state.

・ While lightly hanging the other end portion (left end portion) of the column 9 with a chain book (not shown) so that it can be kept horizontal, the column holder 52 is pushed from one end side (right end side) to the other end side (left end side), The support 9 is pushed to a position where it is removed from the bearing 4 and is not supported. At this time, the support column 9 is held by the support column holder 52 and is also supplementarily supported by a chain block or the like. The column holder 52 is supported by the bearing 3 and the holder guide 51.
The column 9 is moved from one end side (right end side) to the other end side (left end side) while being suspended by a chain block (not shown) and pulled out from the column holder 52.
-When disassembled in this way, the disassembled state as shown in FIG. 12 is obtained.

In Example 2, in addition to the effects of Example 1, the following additional effects can be expected.
(1) The fitting between the brake stand 14 and the column 9 is a clearance fit and can be pulled out manually.
(2) When the motor stand 17 is pulled out from the support column 9, no large jigs and equipment are required, and it can be pulled out manually by using a simple pulling tool 40.
(3) The fitting between the motor stand 17 and the support 9 is a clearance fit, and the pulling force is negligible if the pulling jig 40 is used. At the same time, the magnetic attractive force of the rotor 11 and the stator 18 is of such a magnitude that it can be extracted without any problem by the axial force generated by screwing the extraction bolt 44.
(4) In this example, by extending the shaft portion of the support column 9 with the guide collar 41, the motor stand 17 is supported in the correct posture by the support column 9 until the magnetic attraction force of the rotor 11 and the stator 18 stops working. Therefore, there is no risk of gap imbalance. Therefore, there is no possibility that the rotor 11 and the stator 18 are attracted by the magnetic attractive force and cannot be disassembled.
(5) The outer diameter of the support column 9 is made gradually smaller up to the brake stand 14 with the fitting portion with the bearing 4 being the maximum, the fitting of the support column 9 and the bearing 3 and the fitting of the support column 9 and the bearing 4 is performed. Since the fitting is a clearance fit, the support column 9 can be pulled out from the bearings 3 and 4 by human power using the drawing jig 40 without using a large-scale hydraulic drawing device or the like.
(6) Tools required for disassembling / assembling are a manual jack 30, a drawing jig 40, a column guide 50, a chain block, a spanner and a wrench, all of which are easy to carry into and out of the machine room, The dimensions and weight can be used without problems in the machine room.

Example 3
A method for disassembling and assembling the hoisting machine 1 of the first embodiment will be described as a third embodiment in which the procedure is partially different from that of the second embodiment. The third embodiment is basically the same as the second embodiment. However, the hoisting machine 1 is disassembled and assembled while the rotor 11 and the motor stand 17 including the stator 18 are kept integrated. is there.
Here, the disassembling procedure will be described. Since the assembly procedure is the reverse procedure of disassembly, the description thereof is omitted.

  As shown in FIGS. 13A and 13B, a screw hole 61 is formed in a surface of the motor stand 17 that faces the inner peripheral surface of the rotor 11 during assembly. The screw holes 61 are formed at a plurality of locations along the circumferential direction. A tension bolt 62 (see FIGS. 14A and 14B) is screwed into the screw hole 61.

  Before disassembling, as shown in FIGS. 14A and 14B, the tension bolt 62 is screwed into the screw hole 61 from the inner peripheral side toward the outer peripheral side, and the bolt tip is screwed into the screw hole 61. It protrudes more to the outer peripheral side than the inner peripheral surface of the rotor 11. In this way, the rotor 11 can be fixed to the motor stand 17. That is, the rotor 11 and the motor stand 17 can be fixed integrally while maintaining the “motor gap between the rotor 11 and the stator 18” and “the axial position between the rotor 11 and the stator 18” in the assembled state.

  As described above, the rotor 11 and the motor stand 17 are fixed together while maintaining the “motor gap between the rotor 11 and the stator 18” and “the axial position between the rotor 11 and the stator 18”. When completed, the bolts 13 are loosened and the rotor 11 is removed from the drive sheave 2 as shown in FIG. By removing the rotor 11 in this manner, the rotor 11 and the motor stand 17 can be integrated and disassembled from the drive sheave 2 while maintaining a predetermined “motor gap” and “axial position”.

  The other procedures for decomposition are the same as those in the second embodiment.

  In the third embodiment, when exchanging the driving sheave 2 that has reached the wear limit, the tension bolt 62 is used to fix the rotor 11 and the stator 18 included in the motor stand 17 together while maintaining the assembled state. In addition, since it can be disassembled and assembled together without separation, the working time can be further shortened.

[Example 4]
Example 4 is a hoist 1A in which the motor is an outer rotor type as shown in FIG. In the hoist 1A, a permanent magnet 12A is fixed to the inner peripheral surface of the rotor 11A. The rotor 11A is bolted to the other end surface (left end surface) of the drive sheave 2 by a bolt 13A.
The stator 18 </ b> A is attached to the motor stand 17. Moreover, the stator 18A is disposed on the inner peripheral side and the rotor 11A is disposed on the outer peripheral side.

  As shown in FIGS. 17 and 18A, 18B, a screw hole 61A is formed in a surface of the motor stand 17 that faces the outer peripheral surface of the rotor 11A during assembly. The screw holes 61A are formed at a plurality of locations along the circumferential direction. A tension bolt 62A (see FIGS. 19A and 19B) is screwed into the screw hole 61A.

  Before disassembling, as shown in FIGS. 19A and 19B, the tension bolt 62A is screwed into the screw hole 61A from the outer peripheral side toward the inner peripheral side, and the bolt tip is connected to the screw hole 61A. It protrudes more to the inner peripheral side than the outer peripheral surface of the rotor 11A. In this way, the rotor 11A can be fixed to the motor stand 17. That is, the rotor 11A and the motor stand 17 can be integrally fixed while maintaining the “motor gap between the rotor 11A and the stator 18A” and “the axial position between the rotor 11A and the stator 18A” in the assembled state.

  As described above, the rotor 11A and the motor stand 17 are fixed together while maintaining the “motor gap between the rotor 11A and the stator 18A” and “the axial position between the rotor 11A and the stator 18A”. When completed, the bolt 13A is loosened and the rotor 11A is removed from the drive sheave 2. By removing the rotor 11A in this way, the rotor 11A and the motor stand 17 can be integrally disassembled from the drive sheave 2 while maintaining a predetermined “motor gap” and “axial position”.

  The structure of other parts and the other procedures for disassembly are the same as those in the second embodiment.

  Even in the hoisting machine 1A in which the motor is an outer rotor type as in the fourth embodiment, the same effect as the hoisting machine 1 in which the motor is an inner rotor type can be obtained.

[Example 5]
An embodiment in which an encoder device is attached to the hoist 1 will be described as a fifth embodiment with reference to FIGS.
A bearing cover 5A attached to one end surface (right end surface) of the drive sheave 2 by the bolt 6 is larger than the bearing cover 5 shown in FIG. A driving gear 71 is fixed to the bearing cover 5A. The rotational axis of the drive side gear 71 is arranged in a state that coincides with the rotational axis of the drive sheave 2. The drive-side gear 71 is a small gear having a significantly smaller diameter than the diameter of the drive sheave 1.

  The encoder 72 is fixed to the brake stand 14 via an encoder mounting base 73. A driven side gear 74 is attached to the rotation shaft of the encoder 72, and the driven side gear 74 meshes with the drive side gear 71. That is, the dimensions and shapes of the encoder mounting base 73 and the brake stand 14 are set so that the driven gear 74 and the driving gear 71 are engaged with each other.

  The configuration of other parts is the same as that shown in FIG.

  In the fifth embodiment, when the drive sheave 2 rotates, the bearing cover 5A and the drive side gear 71 fixed to the drive sheave 2 rotate. As a result, the driven gear 74 meshed with the drive gear 71 rotates, the encoder rotation shaft to which the driven gear 74 is fixed rotates, and the encoder 72 can detect the rotation of the drive sheave 2.

In the fifth embodiment, since the driving side gear 71 (a member corresponding to a rack in the prior art of Patent Document 2) is small, the driving side gear 71 can be easily manufactured integrally and the manufacturing cost can be reduced. Further, since there is no joint in the drive side gear 71, an auxiliary encoder is unnecessary.
Incidentally, the rack of the prior art of Patent Document 2 has a diameter equivalent to that of a driving sheave and is a large component.

  The present invention can be used for various hoisting machines used for elevators and the like.

DESCRIPTION OF SYMBOLS 1,1A Hoisting machine 2 Drive sheave 2a Through hole 2b, 2c Boss part 2d Winding groove 3, 4 Bearing 5, 5A Bearing cover 6 Bolt 7 Bearing cover 8 Bolt 9 Post 9a Center part 9b 1st small diameter part 9c 1st 2 Small diameter part 9d 3rd small diameter part 10 Brake disk 11 Rotor 12 Permanent magnet 13 Bolt 14 Brake stand 14a Through hole 15 Press plate 16 Bolt 17 Motor stand 18 Stator 19 Press plate 20, 21, 23 Bolt 22 Bed 30 Manual jack 31 Jack Base 32 Jack body 32a Screw hole 33 Jack bolt 40 Pulling jig 41 Guide collar 42 Pulling plate 42a Screw hole 43 Mounting bolt 44 Pulling bolt 50 Column guide 51 Holder guide 51a Hole 52 Column holder 61, 61A Screw hole 62, 62A 71 Drive side gear 72 Encoder 73 Encoder mount

The second small diameter portion 9 c of the support column 9 is inserted into the through hole 14 a of the brake stand 14. That is, the columnar second small diameter portion 9c is fitted into the through hole 14a which is a cylindrical hole. With the presser plate 15 pressed against one end surface (right end surface) of the brake stand 14 in the fitted state, the presser plate 15 is bolted to one end surface (right end surface) of the column 9 with the bolt 16. Thereby, the brake stand 14 and the bearing 3 are clamped and fixed between the pressing plate 15 and the support column 9. At this time, the other end surface (left end surface) of the brake stand 14 is in contact with one end surface (right end surface) of the inner ring of the bearing 3, and the other end surface (left end surface) of the inner ring of the bearing 3 is in contact with the central portion 9a and the first small diameter. It abuts on the stepped portion of the portion 9b.

The third small diameter portion 9 d of the support 9 is inserted into the through hole 17 a of the motor stand 17. That is, the columnar third small diameter portion 9d is fitted into the through hole 17a which is a cylindrical hole. With the presser plate 19 pressed against the other end surface (left end surface) of the motor stand 17 in the fitted state in this way, the presser plate 19 is bolted to the other end surface (left end surface) of the column 9 with the bolt 20. As a result, the motor stand 17 is sandwiched and fixed between the presser plate 19 and the support column 9. At this time, one end surface (right end surface) of the motor stand 17 is in contact with the step portion of the central portion 9a and the third small diameter portion 9d. Note that a gap may be provided between the one end surface (right end surface) of the motor stand 17 and the stepped portion of the central portion 9a and the third small diameter portion 9d.

Thus, when the third small diameter portion 9d of the support column 9 is fitted and combined with the through hole 17a of the motor stand 17, the inclination of the motor stand 17 with respect to the axis of the support column 9 is automatically determined in advance. The gap of the fitting portion (the gap between the third small diameter portion 9d and the through hole 17a) and the length of the fitting portion (the length of the third small diameter portion 9d and the through hole 17a in the axial direction so as to be within the allowable range. ) Is set in advance.
In this case, the support 9 and the presser plate 19 are fitted to the motor stand 17 with a clearance fit in both the radial direction and the axial direction. The gap due to the gap fitting is a minimum necessary gap that does not cause harmful misalignment due to the gap and can be smoothly inserted and removed.

Next, the operation and operation of the hoist 1 having the above configuration will be described.
In this hoisting machine 1, the rotor 11 is fixed to the drive sheave 2 so that the axes coincide with each other, the outer rings of the bearings 3 and 4 are fixed to the boss portions 2b and 2c on the inner diameter side of the drive sheave 2, and the bearing Since the support 9 is supported by the 3 and 4 inner rings, the shafts of the drive sheave 2, the rotor 11, and the support 9 coincide.
Since the stator 18 is fixed to the motor stand 17 so that the axial centers thereof coincide with each other, and the through hole 17a of the motor stand 17 and the third small diameter portion 9d of the support column 9 are fitted and joined, the through hole 17a of the motor stand 17 is fitted. And the axis of the stator 18 and the axis of the support column 9 coincide.
Therefore, the axial centers of the rotor 11 and the stator 18 coincide.
Further, in the assembled state, a predetermined gap is maintained between the outer peripheral surface of the rotor 11 and the inner peripheral surface of the stator 18, and the axial positions of the two coincide to form a motor.

Since the brake stand 14 and the motor stand 17 are fixed to the bed 22, the column 9 fixed to both the stands 14 and 17 is also fixed and does not rotate.
On the other hand, the drive sheave 2 is supported by the support column 9 via the bearings 3 and 4 and is thus rotatable. Further, since the rotor 11 and the brake disc 10 are fixed to the drive sheave 2, the rotor 11 and the brake disk 10 rotate together with the drive sheave 2.
Here, since the rotor 11 is fixed to the drive sheave 2, the rotational torque generated by the rotor 11 is directly transmitted to the drive sheave 2. That is, the torque transmission path from the rotor 11 to the drive sheave 2 is short.
Further, since the brake disc 10 is fixed to the drive sheave 2, the braking torque is directly transmitted to the drive sheave 2.

In the first embodiment, the rotor 11 is fixed to the driving sheave 2 so that the axes coincide with each other, and the support column 9 inserted through the through hole 2a of the driving sheave 2 is attached to the boss portions 2b and 2c of the driving sheave 2. The motor stand 17 and the brake stand 14 are mounted by fitting the cylindrical shaft and the cylindrical hole on the same axis as the support column 9 and coaxially with the column 9, and the gap and length of the fitting portion are set appropriately. By restricting the inclination of the column 9 with respect to the axis, both can be mounted concentrically with the column 9 simply by assembling.
Further, since the stator 18 and the rotor 11 attached to the motor stand 17 are automatically concentric, no centering work is required. Therefore , disassembly and assembly are easy, and the working time can be shortened.

・ While the other end portion (left end portion) of the column 9 is lightly suspended to a level that can be kept horizontal by a chain block (not shown), the column holder 52 is pushed from one end side (right end side) to the other end side (left end side), The support 9 is pushed to a position where it is removed from the bearing 4 and is not supported. At this time, the support column 9 is held by the support column holder 52 and is also supplementarily supported by a chain block or the like. The column holder 52 is supported by the bearing 3 and the holder guide 51.
The column 9 is moved from one end side (right end side) to the other end side (left end side) while being suspended by a chain block (not shown) and pulled out from the column holder 52.
-When disassembled in this way, the disassembled state as shown in FIG. 12 is obtained.

In the second embodiment, in addition to the effects of the first embodiment, the following additional effects can be obtained.
(1) The fitting between the brake stand 14 and the column 9 is a clearance fit and can be pulled out manually.
(2) When the motor stand 17 is pulled out from the support column 9, no large jigs and equipment are required, and it can be pulled out manually by using a simple pulling tool 40.
(3) The fitting between the motor stand 17 and the support 9 is a clearance fit, and the pulling force is negligible if the pulling jig 40 is used. At the same time, the magnetic attractive force of the rotor 11 and the stator 18 is of such a magnitude that it can be extracted without any problem by the axial force generated by screwing the extraction bolt 44.
(4) In this example, by extending the shaft portion of the support column 9 with the guide collar 41, the motor stand 17 is supported in the correct posture by the support column 9 until the magnetic attraction force of the rotor 11 and the stator 18 stops working. Therefore, there is no risk of gap imbalance. Therefore , there is no possibility that the rotor 11 and the stator 18 are attracted by the magnetic attractive force and cannot be disassembled.
(5) The outer diameter of the support column 9 is made gradually smaller up to the brake stand 14 with the fitting portion with the bearing 4 being the maximum, the fitting of the support column 9 and the bearing 3 and the fitting of the support column 9 and the bearing 4 is performed. Since the fitting is a clearance fit, the support column 9 can be pulled out from the bearings 3 and 4 by human power using the drawing jig 40 without using a large-scale hydraulic drawing device or the like.
(6) Tools required for disassembling / assembling are a manual jack 30, a drawing jig 40, a column guide 50, a chain block, a spanner and a wrench, all of which are easy to carry into and out of the machine room, The dimensions and weight can be used without problems in the machine room.

[Example 5]
An embodiment in which an encoder device is attached to the hoist 1 will be described as a fifth embodiment with reference to FIGS.
A bearing cover 5A attached to one end surface (right end surface) of the drive sheave 2 by the bolt 6 is larger than the bearing cover 5 shown in FIG. A driving gear 71 is fixed to the bearing cover 5A. The rotational axis of the drive side gear 71 is arranged in a state that coincides with the rotational axis of the drive sheave 2. The drive-side gear 71 is a small gear that is significantly smaller in diameter than the diameter of the drive sheave 2 .

DESCRIPTION OF SYMBOLS 1,1A Hoisting machine 2 Drive sheave 2a Through hole 2b, 2c Boss part 2d Winding groove 3, 4 Bearing 5, 5A Bearing cover 6 Bolt 7 Bearing cover 8 Bolt 9 Post 9a Center part 9b 1st small diameter part 9c 1st 2 Small-diameter portion 9d Third small-diameter portion 10 Brake disc 11 , 11A rotor 12 , 12A permanent magnet 13, 13A Bolt 14 Brake stand 14a Through hole 15 Presser plate 16 Bolt 17 Motor stand
17a Through hole 18 , 18A stator 19 Presser plate 20, 21, 23 Bolt 22 Bed 30 Manual jack 31 Jack stand 32 Jack body 32a Screw hole 33 Jack bolt 40 Pulling jig 41 Guide collar 42 Pulling plate 42a Screw hole 43 Mounting bolt 44 Pull-out bolt 50 Column guide 51 Holder guide 51a Hole 52 Column holder 61, 61A Screw hole 62, 62A Strut bolt 71 Drive side gear 72 Encoder 73 Encoder mounting base
74 Driven side gear

Claims (8)

A drive sheave in which a through hole penetrating in the axial direction is formed in the central portion in the radial direction, and one end portion and the other end portion of the through hole are respectively boss portions,
A bearing on one end side disposed on the boss portion of the one end portion and a bearing on the other end side disposed on the boss portion on the other end portion;
At the one end portion in the axial direction, the diameter decreases in a step shape as it goes from the central portion toward one end side, and at the other end portion in the axial direction, the diameter decreases in a step shape as it goes from the central portion toward the other end side, It is inserted into the through hole of the driving sheave, the small diameter portion of the one end portion is supported by the bearing on the one end side, and the portion near the other end portion of the central portion is supported by the bearing on the other end side. Struts,
A rotor provided with a permanent magnet and attached to the other end surface of the sheave in a concentric state with respect to the drive sheave;
A brake stand having a through hole fitted with a small diameter portion of one end of the support;
A motor stand including a through hole fitted with a small diameter portion of the other end portion of the support column, and a stator arranged concentrically with respect to the rotor;
A bed to which the lower part of the brake stand and the lower part of the motor stand are bolted;
The hoisting machine characterized by having. In claim 1,
At one end portion of the support column, the first small-diameter portion adjacent to the central portion and the second small-diameter portion adjacent to the first small-diameter portion are formed by decreasing the diameter from the central portion toward the one end side. Has been
The first small diameter portion is supported by the bearing on the one end side,
The second small diameter portion is fitted in the through hole of the brake stand,
A hoisting machine characterized by that. In claim 1 or claim 2,
The one end side bearing is disposed by a clearance fit on the one end portion boss portion, and the other end side bearing is disposed by a clearance fit on the other end portion boss portion,
A small diameter portion of one end portion of the support column is fitted into the through hole of the brake stand by a clearance fit,
The small diameter portion of the other end portion of the support column is fitted into the through hole of the motor stand by a clearance fit,
A hoisting machine characterized by that. In any one of Claims 1-3,
The one end side bearing is clamped and fixed between one end side bearing cover bolted to one end surface of the driving sheave and the driving sheave while being in contact with one end surface of the bearing. And
The bearing on the other end side is sandwiched between the bearing sheave on the other end side bolted to the other end surface of the drive sheave and the drive sheave while being in contact with the other end surface of the bearing. Fixed,
The brake stand is clamped and fixed between a support plate on one end side that is bolted to one end surface of the support column in contact with the one end surface of the brake stand, and the support column.
The motor stand is sandwiched and fixed between a press plate on the other end side that is bolted to the other end surface of the support column in contact with the other end surface of the motor stand, and the support column.
A hoisting machine characterized by that. In any one of Claims 1-4,
The rotor is disposed on the inner peripheral side of the stator,
A hoisting machine characterized by that. In any one of Claims 1-4,
The rotor is disposed on the outer peripheral side of the stator,
A hoisting machine characterized by that. In any one of Claims 1-6,
A screw hole formed in a surface of the motor stand facing the rotor,
A tension bolt that integrally fixes the rotor and the motor stand by being screwed into the screw hole from the outside of the motor stand and the tip abutting against the rotor;
A hoisting machine characterized by that. In any one of Claims 4-7,
A drive gear fixed to the bearing cover on the one end side in a concentric state with the drive sheave;
An encoder fixed to the brake stand;
An encoder structure comprising a driven gear attached to the rotary shaft of the encoder and meshed with the drive gear;
A hoisting machine characterized by that.

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