CN104300711A - Spoke motor and hoist for elevator using spoke motor - Google Patents

Abstract

The present invention provides a spoke-type motor capable of reliably fixing a motor rotor with a simple structure, and an elevator hoist using the spoke-type motor. A belt-shaped member (31) made of non-magnetic material having a plurality of windows (34) is provided in the circumferential direction of the outer peripheral end portion of each movable element core (28), and each is connected by a bolt (30). The inner peripheral end of the movable element core (28) is fixed to the inner movable support portion (23). On the other hand, the outer peripheral end portions of the respective movable element cores (28) are respectively inserted into and supported by the respective window portions (34) of the belt-shaped member (31).

Description

Spoke motor and hoist for elevator using spoke motor

technical field

The present invention relates to a spoke-type motor in which a motor stator and a motor rotor are arranged on straight lines extending radially in the same plane from the center of a main shaft, and an elevator hoist using the spoke-type motor.

Background technique

In elevator equipment without a machine room, since the thin hoist is installed in a limited space in the hoistway, if the thin hoist can be miniaturized, the degree of freedom in the arrangement of the equipment in the hoistway can be improved. Therefore, it is important to reduce the size of a thin hoist used in an elevator system without a machine room, and it is especially important to reduce the size of a motor that is an important component of the thin hoist.

As one of techniques for downsizing electric motors, a spoke-type electric motor is known. The spoke motor is composed of a motor stator and a motor rotor arranged on straight lines extending radially from the center of the main shaft in the same plane. The motor rotor is formed by forming a plurality of permanent magnets and magnetic materials on the same circumference. A plurality of movable iron cores arranged so as not to contact each other are alternately arranged. In conventional spoke-type motors, it is difficult to integrate a plurality of permanent magnets and a plurality of movable iron cores and connect them to a rotating shaft. For the main purpose of simplifying the structure and improving manufacturability, there are known technologies in which a permanent magnet, a movable iron core, a member for connecting a rotating shaft, etc. A technique in which a protrusion is provided at the tip and a permanent magnet is mounted on the protrusion (for example, Patent Documents 1 and 2).

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 11-341757

Patent Document 2: Japanese Patent Laid-Open No. 2003-533158

Summary of the invention

The problem to be solved by the invention

However, conventional motors manufactured using resin molding technology have low strength and short service life compared to motors manufactured using steel materials. In addition, when the technique of mounting permanent magnets on the protrusions of the movable iron core is adopted, although the permanent magnets are fixed by the movable iron core, since the movable iron core is fixed to the rotating shaft by resin, the overall strength and the strength of the motor rotor cannot be improved. service life.

In addition, in the elevator equipment, the cable for suspending the elevator car is wound on the sheave of the winch, and the elevator car is raised and lowered by rotating the sheave. When the cable shakes up and down, the elevator car A large vibration occurs in the up and down direction, so that the riding comfort is deteriorated. One of the main causes of vibration in the vertical direction of the cable is the rotational pulsation of the sheave on the hoist (that is, the torque pulsation of the motor), so it is necessary to suppress this pulsation. There are many reasons for the torque ripple of the motor, one of which is the dimensional accuracy of the motor core. If the dimensional accuracy is not enough, the motor will produce large torque ripple.

Contents of the invention

An object of the present invention is to provide a spoke-type motor capable of reliably fixing a motor rotor with a simple structure, and an elevator hoist using the spoke-type motor.

solution

In order to achieve the above object, the present invention provides a spoke-type motor comprising: an outer fixed support part; an inner movable support part formed inside the outer fixed support part and facing the outer fixed support part a plurality of motor stators mounted on a side of the outer fixed support portion opposite to the inner movable support portion and arranged at equal intervals in the circumferential direction; and motor rotors mounted on the inner side An air gap is formed between the movable supporting part and the motor stator, and the movable element cores and permanent magnets are alternately arranged in the circumferential direction. The spoke type motor is characterized in that each A belt-shaped member is provided in the circumferential direction on the outer peripheral end of the movable element core. The belt-shaped member is made of a non-magnetic material and has a plurality of windows. The side end portion is fixed to the inner movable support portion, and the outer peripheral end portion of each movable element core is inserted into and supported by each window portion of the belt-shaped member.

According to the above configuration, the inner peripheral end of the movable element core can be securely fixed to the inner movable support portion by bolts, and the outer peripheral end of the movable element core can be securely fixed by the belt-shaped member having a simple structure. Stay in the offset position centered on the bolt. Therefore, it is possible to effectively control the magnetic flux of the permanent magnets while reliably maintaining the air gap between the motor stator and the motor rotor with a simple structure, whereby high torque can be efficiently obtained.

In addition, in addition to the above-mentioned structure, the present invention is further characterized in that cutouts are respectively formed on the outer peripheral side ends of the movable element cores at positions corresponding to the outer peripheral side surfaces of the belt-shaped member, and the nonmagnetic An outer peripheral holding plate made of a material is fixed between the cutouts of the adjacent movable element cores, and the position of the permanent magnet is held by the outer peripheral holding plate and the band member.

According to the above-mentioned structure, the outer peripheral side holding plate and the band-shaped member can be simply constituted by thin plates, and the outer peripheral side ends of the respective movable element cores and permanent magnets can be reliably held by this simple structure so that they do not move in the circumferential direction. and move radially upwards.

In addition, the present invention is characterized in that, in addition to the above configuration, an inner peripheral position holding portion is provided at the inner peripheral end portion of the movable element core in the vicinity of the bolt, and the inner peripheral position The holding portion restricts the position of the inner peripheral end of the permanent magnet.

According to the above configuration, the position of the inner peripheral end of the permanent magnet can be easily regulated by the inner peripheral position holding portion by effectively utilizing the simple support structure of the outer peripheral end of the permanent magnet. In addition, since the position can be maintained without processing the permanent magnet, the magnetic flux generated by the permanent magnet can be effectively used.

Furthermore, in order to achieve the above object, the present invention provides a thin hoisting machine for an elevator using a spoke-type motor comprising: an outer fixed support portion; an inner movable support portion formed on the outer fixed support portion; inside, and opposite to the outer fixed support part; a plurality of motor stators, which are installed on the side of the outer fixed support part opposite to the inner movable support part, and are equally spaced in the circumferential direction and a motor rotor mounted on the inner movable support portion with an air gap formed therebetween and the motor stator, and movable piece iron cores and permanent magnets alternately arranged in the circumferential direction, in In this spoke-type motor, the sheave is rotatably supported on the other end of the main shaft whose one end is fixed on the frame, and the outer fixed support part is formed by a sheave extending from the opposite side of the frame to the side of the sheave. The inner movable support portion is formed in such a way that it extends from the opposite side of the sheave to the side of the frame, and the thin hoisting machine for an elevator using a spoke motor is characterized in that each A belt-shaped member is provided in the circumferential direction on the outer peripheral end of the movable element core. The belt-shaped member is made of a non-magnetic material and has a plurality of windows. The side end portion is fixed to the inner movable support portion, and the outer peripheral end portion of each movable element core is inserted into and supported by each window portion of the belt-shaped member.

According to the above configuration, the inner peripheral end of the movable element core can be securely fixed to the inner movable support portion by bolts, and the outer peripheral end of the movable element core can be securely fixed by the belt-shaped member having a simple structure. Stay in the offset position centered on the bolt. Therefore, it is possible to configure a small hoisting machine with a simple structure suitable for use in elevator equipment, and it is possible to effectively control the magnetic flux of the permanent magnet while reliably maintaining the air gap between the motor stator and the motor rotor, thereby preventing torque ripple.

Invention effect

According to the spoke motor of the present invention, the inner peripheral end of the movable element core can be reliably fixed to the inner movable support portion by bolts, and the end of the movable element iron core can be securely fixed by the belt-shaped member with a simple structure. The outer peripheral end portion is held at a position shifted around the bolt. Therefore, it is possible to effectively control the magnetic flux of the permanent magnet while reliably maintaining the air gap between the motor stator and the motor rotor with a simple structure.

According to the thin hoisting machine for an elevator using a spoke-type motor of the present invention, the inner peripheral end of the movable element core can be reliably fixed to the inner movable support portion by bolts, and the belt-shaped member with a simple structure can be reliably fixed. The outer peripheral end of the movable element core is held at a position offset from the center of the bolt. Therefore, it is possible to configure a small hoisting machine with a simple structure suitable for use in elevator equipment, and it is possible to effectively control the magnetic flux of the permanent magnet while reliably maintaining the air gap between the motor stator and the motor rotor, thereby preventing torque ripple.

Description of drawings

Fig. 1 is a sectional view of an elevator without a machine room to which the present invention is applied.

Fig. 2 is a side view of the thin hoisting machine for an elevator shown in Fig. 1 .

Fig. 3 is a front view of the thin hoisting machine for an elevator shown in Fig. 2 .

Fig. 4 is a sectional view of the thin hoisting machine for an elevator shown in Fig. 2 .

Fig. 5 is an enlarged view of a main part of the thin hoisting machine for an elevator shown in Fig. 4 .

Fig. 6 is an enlarged front view showing a spoke motor as a main part of the thin hoisting machine for an elevator according to the embodiment of the present invention.

Fig. 7 is a plan view showing a belt-shaped member of the thin elevator hoist shown in Fig. 6 .

Fig. 8 is a side view of the belt member shown in Fig. 7 .

Fig. 9 is a side view showing a motor rotor of the thin hoisting machine for an elevator according to the embodiment of the present invention.

The reference signs are explained as follows:

3 elevator cars

6 Winch for elevator

7 frame

8 sheaves

13 spindle

22 Outer fixed support part

23 Inner movable support

24 motor stator

25 Motor rotor

28 movable core

29 permanent magnet

30 bolts

31 Ribbon member

34 window

35 Inner peripheral side position holding part

36 cuts

37 Peripheral holding plate

38 backing plate

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a cross-sectional view of a hoistway of an elevator without a machine room using a thin hoist for an elevator according to an embodiment of the present invention.

In the elevator passage 1, there is an elevator car 3 that can be raised and lowered along a pair of guide rails 2, a counterweight 5 that can be raised and lowered along a pair of guide rails 4, and a gap between the elevator passage 1 and the elevator car 3. Thin winches for elevators6. In the thin hoisting machine 6 for an elevator, a fixed frame 7 is provided on the elevator car 3 side, and a sheave 8 rotatable relative to the frame 7 is provided on the hoistway wall side. A main rope (not shown) is wound around the sheave 8 so that the counterweight 5 descends in conjunction with the elevator car 3 when the elevator car 3 is raised by the rotation of the sheave 8 . The detailed structure of the thin hoisting machine 6 for elevators will be described later.

The thin hoist 6 for an elevator is usually installed in a gap of several hundred mm between the hoistway 1 and the elevator car 3 so as to face the hoistway 1 . In addition, the counterweight 5 and the guide rail 4 for the counterweight are usually arranged on the lateral side of the thin hoist 6 for the elevator, so the thin hoist 6 for the elevator is surrounded by the hoistway 1, the elevator car 3 and the counterweight 5. Therefore, if the thin elevator hoist 6 can be miniaturized, the section of the hoistway can be reduced, and the degree of freedom in arrangement of the equipment installed in the hoistway 1 can be increased.

Fig. 2 and Fig. 3 are side views and rear views of the aforementioned thin hoisting machine 6 for an elevator.

A brake drum 9 is integrally combined with the outer peripheral portion of the sheave 8, and a frame body 7 is provided at a position of the brake drum 9 near the elevator car 3, and the sheave 8 and the brake drum 9 are supported so as to be able to face each other. Rotate on frame 7. As will be described in detail later, a motor is formed at the opposing portion between the sheave 8 or the brake drum 9 and the frame 7, and the rotor of the motor is mounted on the outer periphery of the brake drum 9. The rotor is attached to an opposing portion of the frame body 7 . When the motor is powered on, the movable part represented by the sheave 8 and the brake drum 9 is driven to rotate integrally. Brake drum 9 performs braking.

Fig. 4 is a cross-sectional view of the thin elevator hoist 6 shown in Fig. 2 .

The frame body 7 is machined after being formed into a rough shape from cast iron, and has a hollow cylindrical hub portion 12 at the center. The left end of the main shaft 13 is cantilever-supported by being firmly fitted into the hub portion 12 , and the bearing housing 15 is rotatably supported by the right end of the main shaft 13 via the bearing 14 . The sheave 8 is integrally joined to the outer periphery of the bearing housing 15 , and the brake drum 9 is integrally joined to the outer periphery of the sheave 8 . The right end surfaces of the main shaft 13 and the bearing 14 are covered by a bearing cover 16 fixed on the bearing housing 15 .

As mentioned above, the frame body 7 as the fixed part, the sheave 8 as the movable part, the brake drum 9 and the bearing housing 15 are arranged to face each other on both ends of the main shaft 13, and the movable part of the latter is opposite to the main shaft. 13 is rotatably supported on the main shaft 13 . The opposing portion between the former fixed portion and the latter movable portion constitutes a spoke-type motor device. The specific structure of this spoke motor device will be described later.

An annular protruding portion 17 protruding toward the frame body 7 is integrally joined to the outer peripheral portion of the brake drum 9 , and a through hole is formed on an upper end surface 19 of the frame body 7 located outside the annular protruding portion 17 . 20. The electromagnetic brake device 10 provided on the upper side of the frame body 7 has a brake pad 21 provided in the manner of penetrating through the through hole 20 provided on the upper end surface 19 of the frame body 7, and the electromagnetic force generated by the electromagnetic brake device 10 makes the The brake pad 21 moves downward to press the brake pad 21 against the annular protrusion 17 of the brake drum 9 , thereby braking the sheave 8 and the brake drum 9 . The electromagnetic brake device 11 provided on the lower side of the housing 7 has the same structure.

Next, a spoke-type motor device provided at an opposing portion between the frame body 7 side as the fixed portion and the sheave 8 and brake drum 9 sides as the movable portion will be described.

FIG. 5 is an enlarged view of a main part of FIG. 4 . An outer fixed support portion 22 is formed inside the annular protruding portion 17 formed on the outer periphery of the brake drum 9. The outer fixed support portion 22 is integrally combined with the frame body 7, protrudes toward the brake drum 9, and has an annular shape. Or a shape that is divided in the circumferential direction. An inner movable support portion 23 is formed at a further inner position of the outer fixed support portion 22. The inner movable support portion 23 is integrally combined with the sheave 8, protrudes toward the frame body 7 side, and has a ring shape or a circumferential direction. Divided shape. The outer fixed support portion 22 and the inner movable support portion 23 are arranged facing each other at a predetermined distance, the motor stator 24 is formed on the opposite side of the outer fixed support portion 22, and the motor stator 24 is formed on the opposite side of the inner movable support portion 23. rotor 25. An air gap is formed between the motor stator 24 and the motor rotor 25 .

The motor stator 24 has a stator core 26 made of laminated electromagnetic steel sheets or the like and a winding 27 made of copper wire, and is configured as a stator of a three-phase AC motor. On the other hand, the motor rotor 25 is disposed opposite to the motor stator 24 with an air gap formed therebetween. Furthermore, the motor rotor 25 has movable element cores 28 and a plurality of permanent magnets, and as will be described in detail later, the plurality of permanent magnets are arranged alternately with the movable element cores 28 in the circumferential direction. The spoke type motor device having the above structure is called an inner rotor type motor because the motor rotor 25 is provided inside the motor stator 24 .

FIG. 6 is an enlarged front view of part of the motor stator 24 and the motor rotor 25 shown in FIG. 5 (that is, the spoke motor).

The motor stator 24 is composed of a plurality of units called teeth, and the plurality of units are formed by winding a winding 27 made of copper wire around a stator formed by laminating a plurality of electromagnetic steel plates in the axial direction of the main shaft 13. Iron core 26 and constitute. That is, the plurality of tooth portions are equally spaced along the circumferential direction of the inner surface of the outer fixed support portion 22 at positions where radial straight lines extending radially from the center of the main shaft 13 approximately reach the inner peripheral surface of the outer fixed support portion 22 and are respectively fixed on the outer fixed support parts 22. In addition, each tooth portion is arranged such that its longitudinal direction is substantially aligned with the above-mentioned radially extending radial direction. In FIG. 6 a winding 27 wound in a concentrated manner is shown, but the winding 27 may also be a winding wound wound in a distributed manner.

On the other hand, the motor rotor 25 is constituted by alternately arranging permanent magnets 29 in the circumferential direction and movable element cores 28 in which a plurality of laminated electromagnetic steel sheets are laminated in the axial direction of the main shaft 13 . The movable element core 28 is approximately equal along the circumferential direction of the outer surface of the inner movable support portion 23 at a position where a radial straight line extending radially from the center of the main shaft 13 substantially reaches the outer peripheral surface of the inner movable support portion 23 . They are arranged at intervals, and are respectively fixed on the inner movable supporting parts 23 by bolts 30 . In addition, each movable element core 28 is provided so that its longitudinal direction is substantially aligned with the above-mentioned radially extending radial line. Each permanent magnet 29 is provided so as to be sandwiched between movable element cores 28 adjacent in the circumferential direction. By the method described above, like the respective movable element cores 28 , the plurality of permanent magnets 29 arranged at equal intervals in the circumferential direction are provided such that N poles and S poles are alternately arranged in the circumferential direction.

Each movable element core 28 is fixed to the inner movable support portion 23 by bolts 30 using bolt holes formed on the inner diameter side thereof. In order to facilitate assembly and improve dimensional accuracy, it is preferable to set the bolt hole of each movable element core 28 slightly larger than the outer diameter of the screw part of the bolt 30, that is to say, it is preferable to form a relationship between the reamer hole and the reamer shaft. In addition, it is preferable that two bolt holes are provided in the radial direction for each movable element core 28 , and they are respectively fixed to the inner movable support portion 23 using two bolts 30 .

The magnetic flux passing through the permanent magnet 29 magnetizes the movable element core 28 such that N poles and S poles are arranged alternately in the circumferential direction at the outer peripheral end of the movable element core 28 facing the motor stator 24 . Therefore, the movable element core 28 is made of a magnetic material. In order to reduce iron losses such as eddy current loss and hysteresis loss, it is preferable to use laminated electrical steel sheets or dust cores.

7 and 8 are a plan view and a side view, respectively, showing a belt-shaped member 31 for supporting the outer peripheral end portions of the movable element core 28 and the permanent magnet 29 .

The belt-shaped member 31 made of a non-magnetic material is formed in a thin belt shape with a thickness of about 2 mm, and has a convex connecting portion 32 and a concave connecting portion 33 formed at its longitudinal end. In addition, in the belt-shaped member 31 , a plurality of window portions 34 are formed at predetermined intervals along the longitudinal direction. The intervals between the respective window portions 34 are the same as the intervals in the circumferential direction of the outer peripheral end portions of the respective movable element cores 28 described above. Furthermore, each window portion 34 is shaped so as to allow insertion of an outer peripheral end portion of each movable element core 28 and to hold the inserted outer peripheral end portion of each movable element core 28 .

The belt-shaped member 31 has a predetermined length, and specifically, it has the ability to fit the convex connecting portion 32 into the concave connecting portion by going around in the circumferential direction after all the heads of the movable element cores 28 are inserted into the respective window portions 34 . The length of the connection within 33. Here, since the belt-shaped member 31 is thin and has low rigidity, it is not necessary to preform it into a circular shape, and it is only necessary to bend the outer peripheral end portion of the movable element core 28 into the window portion 34 of the belt-shaped member 31 one by one. Round is fine. Since the belt-shaped member 31 uses a belt-shaped object and is connected around a circle, it is excellent in manufacturability and can improve workability compared with the case where the whole is formed into a ring shape in advance.

The belt-shaped member 31 may be divided into a plurality of parts in the circumferential direction in advance. At this time, a convex coupling portion 32 and a concave coupling portion 33 are formed in advance at both ends of each divisional portion, and the convex coupling portion 32 and the concave coupling portion 33 of adjacent divisional portions are engaged with each other to perform coupling. Then the whole is formed into a ring shape. In any case, in order to reduce short-circuiting of magnetic flux between adjacent movable element cores 28 and iron losses such as eddy current loss and hysteresis loss generated by the strip-shaped member 31 itself, it is preferable to form the strip-shaped member using a non-magnetic material. 31.

As shown in FIG. 6 , the inner peripheral ends of the movable element cores 28 are respectively fixed to the inner movable support portions 23 by bolts 30 , so that they are substantially immovable in the radial and circumferential directions. Furthermore, since the outer peripheral end portion of each movable element core 28 is prevented from moving in the circumferential direction by a support structure described later, it can also be prevented from moving in the radial direction of the permanent magnet 29 at the same time.

Inner peripheral position holding portions 35 protruding toward the adjacent movable core 28 (that is, protruding in the circumferential direction) are formed near the fixing portions of the respective movable cores 28 fixed with the bolts 30 . The positions in the insertion direction of the permanent magnets 29 inserted between the adjacent movable element cores 28 are determined by contacting the inner peripheral end portions with the inner peripheral position holding portions 35 .

The outer peripheral end portions of the respective movable element cores 28 are inserted into the respective window portions 34 using the belt-shaped member 31, and thereafter, the convex connecting portion 32 and the concave connecting portion 33 of the belt-shaped member 31 are engaged with each other, whereby The outer peripheral end portions of the respective movable element cores 28 are connected. At this time, the outer peripheral end surfaces of the permanent magnets 29 located between the outer peripheral end portions of the movable element cores 28 are in contact with the inner peripheral end surfaces of the belt-shaped member 31, whereby the outer peripheral end surfaces of the permanent magnets 29 are restricted. Location.

In addition, notches 36 are respectively formed at positions corresponding to the outer surface of the belt-shaped member 31 on the outer peripheral end portion of each movable element core 28 in the state where the above-mentioned belt-shaped member 31 is attached. After the belt-shaped member 31 is installed, the outer peripheral side holding plates 37 are respectively fitted into the respective notches 36 on the opposite sides of the respective adjacent movable element cores 28 .

Outer peripheral holding plates 37 are provided in the same manner between all movable element cores 28 adjacent in the circumferential direction, and the number of outer peripheral holding plates 37 is the same as the number of movable element cores 28 . The size of the cutout 36 in the radial direction is the same as or slightly smaller than the thickness of the outer peripheral holding plate 37 . As a result, loosening does not occur after fixing by embedding. Each outer peripheral side holding plate 37 is similar to each belt-shaped member 31, in order to reduce the short circuit of the magnetic flux between the adjacent movable element cores 28 and the iron loss such as eddy current loss and hysteresis loss generated by the outer peripheral side holding plate 37 itself. , preferably formed of non-magnetic materials.

After each outer peripheral holding plate 37 is fitted into each notch 36 , the inner surface of each notch 36 contacts the outer peripheral surface of the belt-shaped member 31 , and the inner peripheral surface of the belt-shaped member 31 contacts the outer peripheral end surface of each permanent magnet 29 . At this time, each movable element core 28 is firmly fixed in the circumferential direction by the belt-shaped member 31 and each outer peripheral side holding plate 37 , and each permanent magnet 29 is firmly fixed in the circumferential direction and the radial direction.

In this way, the plurality of tooth portions arranged at equal intervals in the circumferential direction on the inner side of the outer fixed support portion 22 and the plurality of movable element cores 28 arranged at equal intervals in the circumferential direction on the outer periphery of the inner movable support portion 23 are respectively They face each other across an air gap, thereby constituting a permanent magnet synchronous motor.

However, in order to prevent torque ripple due to insufficient dimensional accuracy, the positioning accuracy of the outer peripheral end of the movable element core 28 is particularly important. When there is a deviation in the axial or circumferential direction, torque ripple will occur.

Since the movable core 28 is formed by precision sheet metal or the like, the dimensional accuracy of the movable core 28 itself is high, but the problem is the assembly accuracy of the movable core 28 . In the radial direction, by fixing the inner peripheral end portion of the movable element core 28 with the reamer bolt 30 , positioning can be performed with high precision. On the other hand, in the circumferential direction, since there is a clearance between the reaming hole and the screw, the movable core 28 can rotate with the position of the reaming bolt 30 as a reference, resulting in poor positional accuracy of the movable core 28. .

By setting the size of the bolt hole on the inner peripheral side end of the movable element core 28 to be smaller than the size of the screw portion of the reaming bolt 30 and setting the gap to 0 or less, it is possible to prevent the movable element core 28 from Move in a circular direction. However, since both the movable element core 28 and the bolt 30 have high rigidity, it is not easy to fit the reaming bolt 30 into the bolt hole. In addition, since the movable element core 28 is formed by laminating electromagnetic steel sheets of about 0.2 to 0.5 mm, if the highly rigid reaming bolts 30 are forcibly inserted into the bolt holes, the movable element core 28 may be damaged.

On the other hand, using the belt-shaped member 31 shown in FIG. 7 and FIG. The inner peripheral side is in contact with the outer peripheral end surface of the permanent magnet 29 . Therefore, assembly can be easily performed, and the outer peripheral end of the movable element core 28 can be positioned with high precision in the circumferential direction, so that the above-mentioned pulsation can be prevented even when a thin elevator hoist is used.

It is preferable to set the number of windows 34 formed on the band-shaped member 31 to be the same as the number of movable piece cores 28, and to make the size of the windows 34 the same as or slightly smaller than the cross-sectional size of the movable piece core 28 so that there is no There will be looseness. In addition, it is preferable that the window portion 34 of the belt-shaped member 31 be processed with high precision by precision sheet metal or laser processing, as with the movable element core 28 . As described above, by fixing each movable core 28 using the band-shaped member 31 , the outer peripheral end of the movable core 28 can be positioned with high precision in the circumferential direction.

Fig. 9 is a cross-sectional view showing a main part of a thin hoisting machine for an elevator according to another embodiment of the present invention, and is an enlarged view of the motor rotor 25 shown in Fig. 5 .

The motor rotor 25 fixed to the protruding portion 23 by bolts 30 has movable element cores 28 and permanent magnets 29 alternately arranged in the circumferential direction. In FIG. time situation. As described above, the outer peripheral end portion of the movable element core 28 is inserted into the window portion 34 of the belt-shaped member 31 . In addition, a notch 36 (not shown) is formed at the outer peripheral end of the movable element core 28 at a position corresponding to the outer peripheral side surface of the belt-shaped member 31, and the outer peripheral holding plate 37 is inserted into the notch 36, and the The outer peripheral side holding plate 37 holds the band-shaped member 31 so that it does not come off from the outer peripheral side end of the movable element core 28 .

According to the above-mentioned structure, the movable element core 28 and the permanent magnet 29 can be prevented from moving in the radial direction (that is, the up-and-down direction in the figure) or the circumferential direction, and the air gap with the motor stator 24 can be kept in an ideal state. .

In addition, in this embodiment, when the motor rotor 25 is fixed to the protruding portion 23 by the bolt 30, a backing plate is provided in the axial direction (that is, the left-right direction in the drawing) of the movable element core 28 and the permanent magnet 29, respectively. 38, and is integrally fastened by the bolt 30. The backing plate 38 may be provided in a continuous ring shape in the circumferential direction, or may be divided into a plurality of parts in the circumferential direction.

According to the above structure, the backing plate 38 can be fixed by the bolt 30 for mounting the motor rotor 25, and the permanent magnet 29 can be reliably prevented from moving or falling off in the axial direction (that is, the left and right directions in the figure) by the backing plate 38.

In addition, in the above-mentioned embodiment, the inner peripheral side position holding part 35 which regulates the position of the inner peripheral side end part of the permanent magnet 29 is provided in the inner peripheral side end part of the movable element core 28. On the other hand, it is also possible to integrally form the inner peripheral side position holding portion 35 in contact with the inner peripheral side end portion (that is, the lower side end portion in the figure) of the permanent magnet 29 on the above-mentioned backing plate 38. The inner peripheral position holding portion 35 regulates the position of the inner peripheral end of the permanent magnet 29 . In this case, the inner peripheral side position holding portion 35 shown in FIG. 6 may be omitted.

In the above-mentioned embodiment, the thin hoisting machine for elevators has been described, but it can also be used as a spoke-type motor. This spoke-type motor has: an outer fixed support part 22; A plurality of motor stators 24, which are installed on the side of the outer fixed support portion 22 opposite to the inner movable support portion 23, and arranged at equal intervals in the circumferential direction; and motor rotors 25, which are installed on the inner side An air gap is formed between the movable support portion 23 and the motor stator 24 , and movable element cores 28 and permanent magnets 29 are alternately provided in the circumferential direction.

As described above, the spoke motor of the present invention is characterized in that it has: the outer fixed support part 22; the inner movable support part 23, which is formed inside the outer fixed support part 22 and is opposed to the outer fixed support part 22; A plurality of motor stators 24 mounted on the side of the outer fixed support portion 22 opposite to the inner movable support portion 23 and arranged at equal intervals in the circumferential direction; and motor rotors 25 mounted on the inner movable support Part 23, an air gap is formed between the motor stator 24, and the movable piece iron core 28 and the permanent magnet 29 are alternately arranged in the circumferential direction, and the outer peripheral side end of each movable piece iron core 28 is provided on the circumference A belt-shaped member 31 made of non-magnetic material with a plurality of windows 34 is provided in the direction, and the inner peripheral end of the movable core 28 is fixed on the inner movable support part 23 by bolts 30, and each movable The outer peripheral end portions of the movable core 28 are respectively inserted into and supported by the respective window portions 34 of the belt-shaped member 31 .

According to the above structure, the inner peripheral end of the movable element core 28 can be reliably fixed to the inner movable support part 23 by the bolt 30, and the outer periphery of the movable element core 28 can be fixed by the belt-shaped member 31 with a simple structure. The side ends are held at offset positions centered on the bolt 30 . Therefore, it is possible to effectively control the magnetic flux of the permanent magnet 29 while reliably maintaining the air gap between the motor stator 24 and the motor rotor 25 with a simple structure.

In addition to the above structure, the present invention is also characterized in that notches 36 are respectively formed on the outer peripheral side ends of the respective movable element cores 28 at positions corresponding to the outer peripheral side surfaces of the belt-shaped member 31, and the outer peripheral sides made of non-magnetic materials are The holding plate 37 is fixed between the cutouts 36 of the adjacent movable element cores 28 , and the position of the permanent magnet 29 is held by the outer peripheral side holding plate 37 and the band-shaped member 31 .

According to the above-mentioned structure, the outer peripheral side holding plate 37 and the band-shaped member 31 can be simply constituted by thin plates, and the outer peripheral side ends of the respective movable element cores 28 and permanent magnets 29 can be reliably held by this simple structure so that they do not Will move in the circumferential direction and radial direction.

In addition, the present invention is characterized in that, on the basis of the above-mentioned structure, the inner peripheral end portion of the movable element core 28 located in the vicinity of the bolt 30 is provided with an inner peripheral edge for restricting the position of the inner peripheral end portion of the permanent magnet 29 . side position holding part 35 .

According to the above structure, the position of the inner peripheral end of the permanent magnet 29 can be easily regulated by the inner peripheral position holding portion 35 by effectively utilizing the simple support structure of the outer peripheral end of the permanent magnet 29 . In addition, since the position can be maintained without processing the permanent magnet, the magnetic flux generated by the permanent magnet can be effectively used.

Furthermore, the present invention provides a thin hoisting machine for an elevator using a spoke-type motor configured to have: an outer fixed support portion 22; an inner movable support portion formed inside the outer fixed support portion 22, and Opposed to the outer fixed support part 22; a plurality of motor stators 24, which are installed on the side of the outer fixed support part 22 opposite to the inner movable support part 23, and arranged at equal intervals in the circumferential direction; and the motor rotor 25, which is installed on the inner movable support part 23, and an air gap is formed between the motor stator 24, and the movable piece iron core 28 and the permanent magnet 29 are alternately arranged along the circumferential direction. In this spoke type motor, the The sheave 8 is rotatably supported on the other end of the main shaft 13, one end of which is fixed on the frame body 7. The outer fixed support portion 22 is formed to extend from the opposite side of the frame body 7 toward the side of the sheave 8, and the inner side is movably supported. The portion 23 is formed so as to extend from the opposite side of the sheave 8 toward the frame body 7 side, and this thin hoisting machine for an elevator using a spoke motor is characterized in that each movable element core 28 is provided at the end of the outer peripheral side. A belt-shaped member 31 made of a non-magnetic material having a plurality of windows 34 is provided in the circumferential direction, and the inner peripheral end of the movable core 28 is fixed to the inner movable support 23 by bolts 30, and each Outer peripheral end portions of the movable element core 28 are respectively inserted into and supported by the respective window portions 34 of the belt-shaped member 31 .

In elevator equipment, the rotational pulsation (that is, torque pulsation) of the sheave 8 is one of the main causes of large vertical vibrations of the cables suspending the elevator car, so it is necessary to suppress the rotational pulsation. There are many reasons for the torque ripple of the motor. One of the methods to suppress the torque ripple is to improve the installation accuracy of the motor rotor 25 and maintain an appropriate air gap between the motor rotor 25 and the motor stator 24 . According to the above structure, the inner peripheral end of the movable element core 28 can be reliably fixed to the inner movable support portion 23 by the bolt 30, and the movable element core 28 can be securely fixed by the belt-shaped member 31 having a simple structure. The outer peripheral end of the bolt 30 is held at a position offset from the center of the bolt 30 . Therefore, it is possible to configure a small winch with a simple structure suitable for use in elevator equipment, and it is possible to effectively control the magnetic flux of the permanent magnet 29 while maintaining an air gap between the motor stator 24 and the motor rotor 25 reliably.

Claims (4)

1. A spoke-type motor comprising: an outer fixed support portion; an inner movable support portion formed inside the outer fixed support portion and facing the outer fixed support portion; a plurality of motor stators, which are installed on the side of the outer fixed support portion opposite to the inner movable support portion and arranged at equal intervals in the circumferential direction; and a motor rotor installed on the inner movable support portion, an air gap is formed with the motor stator, and movable element cores and permanent magnets are alternately arranged in the circumferential direction, The spoke motor is characterized in that, A belt-shaped member is provided in the circumferential direction of the outer peripheral end portion of each movable element core. The belt-shaped member is made of a non-magnetic material and has a plurality of windows, and the movable element is fastened by bolts. The inner peripheral end of the core is fixed to the inner movable support portion, and the outer peripheral end of each movable element core is inserted into and supported by each window portion of the belt-shaped member. 2. The spoke motor according to claim 1, wherein: Cutouts are formed on the outer peripheral end portions of the respective movable element cores at positions corresponding to the outer peripheral side surfaces of the belt-shaped members, and the outer peripheral side holding plates made of non-magnetic materials are fixed to the adjacent movable element cores. Between the slits of the moving element core, the position of the permanent magnet is held by the outer peripheral side holding plate and the band member. 3. The spoke motor according to claim 1 or 2, characterized in that, An inner peripheral position holding portion for restricting movement of the inner peripheral end of the permanent magnet is provided at an inner peripheral end portion of the movable element core near the bolt. Location. 4. A thin hoisting machine for an elevator using a spoke-type motor, the spoke-type motor comprising: an outer fixed support part; an inner movable support part formed inside the outer fixed support part and fixed to the outer side The support parts are opposed; a plurality of motor stators are installed on the side of the outer fixed support part opposite to the inner movable support part, and are arranged at equal intervals in the circumferential direction; and motor rotors are installed An air gap is formed between the inner movable support portion and the motor stator, and movable element cores and permanent magnets are alternately arranged in the circumferential direction. In the spoke motor, the The sheave is rotatably supported on the other end of the main shaft, one end of which is fixed to the frame, the outer fixed support part is formed to extend from the opposite side of the frame to the side of the sheave, and the inner side can The movable support part is formed to extend from the opposite side of the sheave to the side of the frame, The thin hoisting machine for an elevator using a spoke-type motor is characterized in that, A belt-shaped member is provided in the circumferential direction of the outer peripheral end portion of each movable element core. The belt-shaped member is made of a non-magnetic material and has a plurality of windows, and the movable element is fastened by bolts. The inner peripheral end of the core is fixed to the inner movable support portion, and the outer peripheral end of each movable element core is inserted into and supported by each window portion of the belt-shaped member.