JPH0295148A - Magnet supporting device for motor - Google Patents

Abstract

PURPOSE:To prevent fragments from dropping even if a magnet is cracked by rigidly integrating a nonmagnetic metal member covering a window for containing a magnet with a cylindrical frame of a synthetic resin at the time of molding of resin of the frame. CONSTITUTION:A cylindrical frame 2 is molded of synthetic resin, a nonmagnetic metal member 4 is so disposed as to cover the inner periphery of a window 3 at its inside, and a through part 4' communicating with the exterior of the member 4 is provided at least at a part of the section in contact with the frame 2. The parts 2-1, 2-2 of the resin of the frame 2 are disposed at the parts of the inner and outer faces of the member 4 through the part 4' at the time of molding of the frame 2 with resin thereby to integrate the frame 2 with the member 4. Accordingly, the member 4 can be rigidly secured to the frame 2. Thus, the inner periphery of the window 3 is covered with the member 4 with effective and sufficient mechanical strength to effectively prevent fragments from dropping even in case of the damage of the magnet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for supporting a magnet used in a motor.

[Conventional technology]

Conventionally, small motors etc. have magnets (
permanent magnets) are used. Various devices for supporting this magnet have been proposed in the past.

For example, as disclosed in Japanese Patent Publication No. 47-38125, a pocket portion that can tightly surround a permanent magnet is formed in a cylindrical frame (cage body) that is inserted and fixed into a motor. In addition to forming a window on the circumferential surface of the cylindrical frame, an elastic protrusion is provided on the edge of the window, as disclosed in Japanese Utility Model Publication No. 51-20407. There is a technique in which a magnet is inserted into the magnet and at the same time, elastic protrusions hold the magnet in such a way as to press it.

In addition, a pocket portion is formed by incorporating a non-magnetic cover plate separate from the frame into the inner circumferential side of the window of a cylindrical frame as in Utility Model Publication No. 51-20407. Methods such as fitting a magnet into the part have been put into practical use.

[Problem to be solved by the invention]

Among these conventional techniques, those in which a magnet is fitted into a window of a cylindrical frame may cause the following problems if the inner periphery of the window is exposed. In other words, when a magnet is used as a stator magnetic pole, if the magnet cracks due to mechanical shock or vibration, the fragments will enter the tiny gap between the magnet and the rotor, causing damage to the rotor, or in the worst case, This will cause the rotor to lock up.

Therefore, it is desirable to cover the inner peripheral surface of the magnet storage window, but the conventional covering method has the following points to be improved.

That is, when covering a window, conventionally, as mentioned above, a cover plate separate from the cylindrical frame was built into the inner periphery of the window, or a magnet storage pocket was installed in the cylindrical frame as in Japanese Patent Publication No. 47-38125. The part is integrally molded with the frame. However, in the former method, a non-magnetic cover plate is built into a resin-molded cylindrical frame, and then the magnetic 1-
Since the magnetic screws 1 to the assembly are inserted into the motor case while maintaining this state, the number of man-hours required for assembling the motor increases, which is a factor that hinders the improvement of assemblability.

Furthermore, in the latter case where the magnet storage pocket including the cover plate is integrally molded with the cylindrical frame, the cover plate and the cylindrical frame are usually molded from synthetic resin. In this case, if the present invention is to be applied to a small motor or the like, the gap between the inner periphery of the magnet and the outer periphery of the rotor usually needs to be 1rNIl or less. For this reason, the wall thickness of the portion that covers the inner periphery of the makunetsu 1 needs to be as thin as 0.2-0.511Tl. However, in this conventional technology, the cover plate is made of synthetic resin together with the cylindrical frame, and since this cover plate is the part located on the outer periphery of the rotor that generates the most heat in the motor, it is necessary to ensure heat resistance. In order to achieve this, it is necessary to add a reinforcing material (for example, glass fiber) to the synthetic resin.

Addition of the reinforcing material tends to reduce the vortex flow during molding of the cylindrical frame, and as a result, it becomes difficult to mold the cover plate portion with a thin resin.

The present invention has been made in view of the above points, and its purpose is to prevent the fragments from falling off even if the magnet is cracked, to provide excellent assembly ease, and to provide a structure that prevents the cracks between the magnet and the rotor. An object of the present invention is to provide a magnetic support device that can easily secure a minute gap.

[Means to solve the problem]

The above objective is achieved as follows.

Hereinafter, the present invention will be explained with reference to the reference numerals of the embodiments shown in FIGS. 1, 2, and 14 in order to facilitate understanding of the contents thereof (FIG. 1 is a perspective view of one embodiment of the present invention. , FIG. 2 is a sectional view taken along line I-, 1 in FIG. 1, and FIG. 3 is a sectional view of another embodiment.

The first basic problem solving means of the present invention has a cylindrical frame 2, as shown in FIGS. 3 and this window part 3
In a magnet support device of the type in which an arc-shaped magnet 13 is fitted into the frame, the cylindrical frame 2 is molded from synthetic resin,
A non-magnetic metal member 4 is arranged inside the cylindrical frame 2 so as to cover the inner periphery of the window 3, and a portion of the non-magnetic metal member 4 that is in contact with the cylindrical frame 2 is A through-hole 4 that at least partially communicates with the inside and outside of the non-magnetic metal member 4
' is provided, and this penetration part 4' is provided during resin molding of the cylindrical frame 2.
By placing a part of the resin 2-1, 2-2 of the cylindrical frame 2 through a part of the inner and outer surfaces of the non-magnetic metal member 4,
It is formed by integrating a cylindrical frame 2 and a non-magnetic metal member 4.

The second basic problem-solving means, for example, as shown in FIG.
A non-magnetic metal member 4-5 is arranged inside this cylindrical frame 2 so as to cover the inner periphery of the window portion 3, and a part of this non-magnetic metal member 4-5 is provided with a bending part 47
This bent portion 47 is embedded in the cylindrical frame 2 during resin molding of the cylindrical frame 2 to integrate the cylindrical frame 2 and the non-magnetic metal member 4-5.

Although not shown, the third basic problem-solving means is the first method mentioned above.
．． Similar to the second problem solving means, a cylindrical frame having a window is molded from synthetic resin, and a non-magnetic metal member is placed inside the cylindrical frame so as to cover the inner periphery of the window. But,
The part of this non-magnetic metal member that is in contact with the cylindrical frame is welded to the inner periphery of the cylindrical frame during resin molding of the cylindrical frame, so that the cylindrical frame and the non-magnetic metal member are bonded together. It becomes one by integrating.

[Effect]

First, according to the first basic problem solving means, at least a part of the non-magnetic metal shoulder member 4 that covers the inner circumference of the magnet fitting window 3 is in contact with the cylindrical frame 2. Resin 2-1.2 of frame body 2 arranged in communication via 4'
-2 both inside and outside are covered with resin 2-1, and this inside and outside resin 2-1
．． Since 2-2 are connected to each other, the non-magnetic metal member 4 can be firmly fixed to the cylindrical frame 2.

Therefore, by covering the inner periphery of the window portion 3 with the non-magnetic metal member 4 reliably and with sufficient mechanical strength, even if the magnet is damaged, it is possible to reliably prevent fragments from falling off.

In addition, since the non-magnetic metal member 4 is set in a mold during resin molding of the cylindrical frame 2 and integrated with the cylindrical frame 2, the non-magnetic metal member (cover plate) is The troublesome work of assembling the cylindrical frame after molding is not required, and the number of man-hours for assembling the parts can be reduced accordingly, thereby streamlining the assembling work.

Furthermore, since the non-magnetic member 4 is made of metal rather than resin, it can be heat resistant even if it has a thin structure, so it can be used to cover magnets for stator side field poles that are affected by heat from the rotor side. Also, a small gap between the magnet and the rotor can be easily secured.

Next, according to the second basic problem solving means, the retaining bent portion 47 provided on a part of the non-magnetic metal member 4-5 is embedded in the cylindrical frame 2 during resin molding. Bending part 47
has a retaining function and can firmly fix the non-magnetic metal member 4-5 to the cylindrical frame 2.

Therefore, in this case, as well as preventing the magnet from falling off as in the first problem-solving means, the non-magnetic metal member 4-5 is integrated during resin molding of the cylindrical frame 2, and the assembly work of the magnet support device is simplified. It is possible to achieve rationalization and to make the non-magnetic metal member thinner, thereby easily ensuring a minute gap between the magnet and the rotor.

In addition, in the third problem-solving means, the part of the non-magnetic metal member that contacts the inner periphery of the cylindrical frame is welded with resin during resin molding, but in this method, for example, the non-magnetic metal member is I-, non-magnetic metal members are wrapped around the cylindrical frame, and the first. Although the bonding force is slightly inferior to that of the second problem-solving means, the non-magnetic metal member can be sufficiently fixed to the cylindrical frame. If this third problem-solving means is applied as a magnet support device for a motor with relatively few vibrations, shocks, etc., it will sufficiently prevent the magnet from falling off. Similarly to the second problem-solving means, it is possible to streamline the assembly work of this type of magnet support device and easily ensure a small gap between the magnet and the rotor.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line I-I, and FIG. 3 is a vertical sectional view of a permanent magnet type motor to which the first embodiment is applied. Figure 4 is n- of Figure 3.
It is an n-line sectional view.

In FIGS. 1 and 2, 1 is a magnetic support device,
The components include a cylindrical frame 2 and a cylindrical net material (non-magnetic metal member) 4.

The cylindrical frame 2 is made of synthetic resin, and has windows 3 formed on its circumferential surface for fitting into the two magnets 1.

The outer diameter of the cylindrical frame 2 is equal to the yoke 10 of the motor shown in FIG.
It is formed with dimensions that allow it to be fitted to the inner diameter, and the inner periphery of the window 3 is covered with a net material 4, so that the window 3 becomes pocket-shaped.

The net material 4 is formed from a fibrous heat-resistant magnetic metal member so as to exhibit a fine mesh, and its outer diameter is set to approximately match the inner diameter of the cylindrical frame 2. In addition, the net material 4 has a portion that covers the shape of the window portion 3.
It has an arc shape that is approximately the same as, but slightly larger than, the inner circumference of the magnet 13 that is fitted into the magnet.

Here, the structure of attaching the net material 4 to the cylindrical frame 2 will be explained.

In this embodiment, the net material 4 is fixedly arranged inside the cylindrical frame 2. In this case, a part of the net material 4 is connected to the inner periphery of the window partition 2a of the cylindrical frame 2 and both ends 2b in the axial direction of the frame. , 2c. Then, when molding the cylindrical frame 2 with resin, the net member 4 is also set in the mold to integrate the two, but in this case, as shown in FIG. A penetrating portion (in this embodiment, the mesh of the net itself is used) 4 inside and outside the portion that contacts the partition portion 2a.
' The resin 2-1, 2-2 is arranged to flow through it, and the frame 2 is
．． The net material 4 is integrated. This resin part 2-1.2-2
They are connected to each other via the through portion 4'.

Therefore, the net material 4 is firmly fixed to the cylindrical frame 2,
In addition, by covering the inner circumference of the window portion 3 with the net material 4, the window portion 3
takes on a pocket shape. A magnet 13 having an arcuate curved surface is tightly fitted into this pocket 3.

Reference numeral 5 denotes a positioning groove formed in the axial direction of the cylindrical frame 2. The groove 5 is formed linearly across both ends 2b, 2c of the frame 2 and the outer periphery of the partition 2a, and consists of two grooves in total. .

Next, the incorporation of the magnet support device 1 having the above structure into a motor will be explained based on FIGS. 3 and 4.

3 and 4, 10 is a yoke serving as a motor housing, and 11 is an end bracket 1 to 1 that covers an opening at one end of the yoke 10. 12 is a rotor, 13 is a magnet, 1
4 is a protrusion formed by extruding a part of the yoke 10 inward;
The protrusions 14 are set to dimensions that allow them to fit and engage with the grooves 5 provided on the cylindrical frame 2, and two protrusions 14 are arranged at 180° intervals corresponding to the grooves 5. It is arranged near one open end of the yoke 10.

The magnet 13 of this embodiment constitutes a field pole on the stator side, and is inserted into the yoke 10 together with the frame 2 through an opening at one end while being set in a pocket (window) 3 of the cylindrical frame 2. However, during insertion, the groove 5 and the protrusion 14 are aligned at the initial stage of insertion, and the cylindrical frame 2 and the magnet 13 are pushed into the yoke 10. As a result, the entire magnet support device 1 is positioned in the circumferential direction with respect to the yoke 10 at the initial stage of insertion.

When the magnetic support device 1 is completely inserted into the yoke 10, one axial end surface of the cylindrical frame 2 comes into contact with the inside of one end of the yoke 10, and in this state, the end bracket 11 is inserted into one end of the yoke 10. If it is attached to the opening via a screw, the tip of the part 11a of the end bracket 11 will come into contact with one end of the cylindrical frame 2 while fitting into the opening at one end of the yoke 10, and in this way, The cylindrical frame 2 and thus the magnet support device 1 are fixed in the axial direction within the motor.

That is, the total length of the cylindrical frame 2 is set to match the length from one inner end 10b of the yoke 1 to one end of the fitting part 11a of the end bracket 11, and each end 10b,
lla regulates the axial direction of the cylindrical frame 2. Also,
The outer circumference of the magnet 13 is pressed against the inner circumference 10a of the yoke by the net material 4.

Here, the gap between the inner circumference of the net material 4 and the rotor 12 is normally set to 0.2 to 0.5 mm, and the thickness of the net material 4 is selected so as not to completely fill this gap. It is.

According to this embodiment, the following effects are achieved.

(1) Since the net material 4 forming part of the magnet storage pocket 3 is integrated with the cylindrical frame 2 and firmly fixed to the frame 2, even if the magnet 13 is damaged,
It is possible to reliably prevent it from falling off and improve the reliability of this type of motor.

(2) The cylindrical frame 2 and the net material 4 can be integrated during the resin molding of the cylindrical frame 2, so after molding these two members to form the frame 2 as in the past, the net material 4 is It is possible to omit the troublesome work of assembling the magnetic support bag W1, to streamline the assembly work of the entire magnet support bag W1, and to reduce manufacturing costs.

(3) The net material 4 itself is a non-magnetic metal member (wire rod)
Since the net material 4 can be thin and have heat resistance 2 and mechanical strength, even if the net material 4 is interposed between the magnet 13 and the rotor 12, a small gap between the magnet 13 and the rotor 12 can be sufficiently secured. Can be done.

(4) When incorporating the magnet support device 1 into the motor 10, the grooves 5 of the frame 2 engage with the protrusions 14 on the yoke 10 side at the initial stage of inserting the cylindrical frame 2 into the yoke 10. The support device 1 is positioned and fixed in the circumferential direction, and if the cylindrical frame 2 is pushed into the yoke 10 and the end bracket 11 is attached, the axial direction is fixed automatically, so it is easy to assemble the motor itself. Work can be simplified.

FIG. 5 is a perspective view showing a second embodiment of the present invention, and FIG. 6 is a sectional view taken along line mm in FIG. 5. In the figure, the same reference numerals as in the first embodiment indicate the same or common elements.

This embodiment has almost the same configuration as the first embodiment,
The difference lies in that reinforcing ribs 6 are formed in the direction of the solid axis on the inner periphery of each window (pocket) 3.

This reinforcing rib 6 has the effect of reinforcing the metal net material 4. Further, as shown in FIG. 8, the magnet 13 to be fitted into the pocket part 3 of this embodiment has a groove 7 in its inner periphery that can be fitted with the rib 6. This is to ensure that it does not interfere with fitting.

FIGS. 8 and 9 show a third embodiment of the invention.

FIG. 8 is a perspective view of a non-magnetic metal member 4-1 used in the third embodiment. Unlike the first embodiment, the non-magnetic metal member 4-1 is formed by rolling a thin plate material into a cylindrical shape and joining them together. The circumferential ends are welded together, and a part of the circumferential surface (cylindrical frame 2
A penetrating portion 4 is provided in
' is provided with a hole 40. In this example,
When the cylindrical frame 2 is molded with resin, a part of the resin 2-1, 2-2 is arranged to flow in and out of the non-magnetic metal material 4-1 through the hole 40, as shown in FIG. and the cylindrical frame body 2
and the non-magnetic metal material 4-1 are integrated, and the same effects as in the first embodiment can be achieved. Note that instead of the hole 40, a notch may be formed in the non-magnetic metal material 4-1 to form the through portion 4'.

10 and 11 show a fourth embodiment of the present invention. FIG. 10 is a perspective view of a non-magnetic metal member 4-2 used in the fourth embodiment. The points are bent at both ends in the circumferential direction), and a gap 41 is provided between them,
This gap 41 constitutes a through-hole 4' for resin flow.

In this embodiment, as shown in FIG. 11, a portion of the resin 2-1.2-1 passes through a gap 41 into the inside and outside of the portion of the cylindrical frame body 2 that is in contact with the nine window partitions 2a on one side. flow arranged,
Even in this case, the same effects as those of the above embodiments can be achieved.

FIG. 12 shows a modification (fifth embodiment) of FIG. 11. In this embodiment, the gap 41 is not provided, and the circumference of the non-magnetic metal member 4-3, which is made by rolling a single plate, is determined. A bent portion 42 for preventing the cylindrical frame 2 from coming off is formed by bending the directional end portion, and this bent portion 42 is embedded in the cylindrical frame 2 during resin molding of the cylindrical frame 2. The body 2 and the non-magnetic metal member 4-2 are integrated.

This embodiment has a through-hole 4 for resin flow as in each of the above-mentioned embodiments.
Although the cylindrical frame 2 is arranged only on the outside of the non-magnetic metal member 4-2 without providing the bent part 4 embedded in the frame 2,
2 exerts a retaining effect, so that the cylindrical frame body 2 and the non-magnetic metal member 4-2 can be strengthened and integrally connected.

13 to 15 are sectional views showing sixth to eighth embodiments of the present invention.

In the embodiment shown in FIG. 13, a cylindrical non-magnetic metal member 4-4 is divided into halves, and a gap 44 is secured between the circumferential ends of the divided elements 42 and 43. 4
4 constitutes a penetration part 4' for resin flow, and part 2-1.2-2 of the cylindrical frame 2 is inserted into and out of the non-magnetic metal member 4-4 through the gap 44 during resin molding. Can be placed in a flow-through manner.

In the embodiment shown in FIG. 14, a cylindrical non-magnetic metal member 4-5 is divided into halves, and bent portions 47 are provided at circumferential ends of the divided elements 45 and 46 to prevent them from coming off. This bent portion 47 is formed into a part 2a of the frame when the cylindrical frame 2 is molded with resin.
This can be said to be a modification of the fifth embodiment.

In the embodiment shown in FIG. 15, a large number of holes 48 are formed in an undivided non-magnetic metal member 4-6, and these holes 48 are used as penetration parts 4' for resin flow. A portion of the resin 2-1 is arranged to flow back into and out of the non-magnetic metal member 4-6 through the resin part 2-1.
．． Among 2-2, the inner side 2-2 is made into a small protrusion.

These fifth to eighth embodiments can also produce the same effects as the other embodiments described above.

FIG. 16 shows a non-magnetic metal member 4-7 used in a ninth embodiment of the present invention, and the non-magnetic metal member 4-7 as shown in the figure has a cylindrical shape. Non-magnetic metal member 4 of this embodiment
-7 does not have the penetration part for resin flow or the bending part for preventing the resin from coming off as described above, and the outer peripheral part of this non-magnetic metal member 4-7 in contact with the cylindrical frame is shaped into a cylindrical shape. The resin of the frame itself is welded to the inner periphery of the cylindrical frame during resin molding of the frame. This embodiment is suitable for motors that are used under relatively low vibration and shock conditions.

In each of the above-mentioned embodiments, an example in which a non-magnetic metal member is fixed to the inner periphery of the window partition 2a of the cylindrical frame 2 has been described. It is also possible to fix a non-magnetic metal member to the inner periphery by the method described in each embodiment.

〔Effect of the invention〕

As described above, according to the present invention, by firmly integrating a non-magnetic metal member covering a window for magnet storage into a cylindrical frame made of synthetic resin during resin molding of the cylindrical frame, magnets can be Even if cracks occur in the frame, the pieces can be prevented from falling off, and the cylindrical frame and the non-magnetic metal member can be integrated at the same time when forming the frame, improving the ease of assembling these parts together. By making the non-magnetic metal member covering the window thin, it is possible to easily secure a small gap between the motor magnet and the rotor, thereby increasing the reliability and practicality of this type of magnet support device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line I-1 in FIG. 1, and FIG. 3 is a vertical sectional view of a motor to which the first embodiment is applied. 4 is a sectional view taken along line nn in FIG. 3, FIG. 5 is a perspective view showing the second embodiment of the present invention, FIG. 6 is a sectional view taken along line ■-■ in FIG. 5, and FIG. 8 is a perspective view of a non-magnetic metal member used in the third embodiment of the present invention, FIG. 9 is a sectional view of the third embodiment, and FIG. 10 is a perspective view of the magnet used in the second embodiment. A perspective view of a non-magnetic metal member used in a fourth embodiment of the present invention, FIG. 11 is a sectional view of the fourth embodiment, and FIG. 12 is a partial sectional view showing a fifth embodiment of the present invention.
13 to 15 are cross-sectional views showing sixth to eighth embodiments of the present invention, and FIG. 16 is a perspective view of a nonmagnetic metal member used in a ninth embodiment of the present invention. 1... Magnet support device, 2... Cylindrical frame, 2
-1.2-2...Part of the frame (resin), 3...Window part,
4...Nonmagnetic metal member (net material), 4-1 to 4-7
... Non-magnetic metal member (plate material), 4'... Penetration part, 5
... Groove, 6... Reinforcing rib, 10... Motor housing (yoke), 13... Magnet, 14... Protrusion, 40... Hole (penetrating part), 41.44... Gap (penetrating part), 42, 43, 45, 4.6... divided non-magnetic metal member. Figure 4-l-Dentai old scrap material No. 9 圀4-r--Untied tA shod material

Claims (1)

[Scope of Claims] 1. A motor that has a cylindrical frame body, a predetermined number of windows are formed on the circumferential surface of the cylindrical frame body, and arc-shaped magnets are fitted into the windows. In the magnetic support device, the cylindrical frame is molded from synthetic resin, a non-magnetic metal member is arranged inside the cylindrical frame so as to cover the inner periphery of the window, and the non-magnetic metal At least a part of the member that contacts the cylindrical frame is provided with a through part that communicates with the inside and outside of the non-magnetic metal member, and when the cylindrical frame is molded with resin, the cylindrical frame is A motor characterized in that the cylindrical frame body and the non-magnetic metal member are integrated by disposing a part of the resin of the frame body through a part of the inner and outer surfaces of the non-magnetic metal member. magnetic support device. 2. In the first claim, the non-magnetic metal member is made of a cylindrical net-like member that fits the inner periphery of the cylindrical frame, and the mesh itself constitutes the through-hole for the resin flow. Magnetic support device for motors. 3. In the first aspect, the non-magnetic metal member is made of a cylindrical plate material that fits the inner periphery of the cylindrical frame, and the plate material is provided with at least one of a hole and a notch, and A magnet support device for a motor comprising a hole, a notch, etc. as a through-hole for resin flow. 4. In the first aspect, the non-magnetic metal member is formed by rolling a sheet of plate material, and a gap is provided between both ends of the plate material in the circumferential direction, and this gap is formed by forming the through-hole for resin flow. A magnetic support device for the motor. 5. In the first claim, the non-magnetic metal member is formed by dividing a cylindrical member into halves, and a gap is provided between opposing circumferential ends of the divided non-magnetic metal members. , a motor magnet support device in which this gap serves as a through-hole for the resin flow. 6. A magnet support device for a motor that has a cylindrical frame body, a predetermined number of windows are formed on the circumferential surface of the cylindrical frame body, and arc-shaped magnets are fitted into the windows, as described above. A cylindrical frame is molded from synthetic resin, and a non-magnetic metal member is placed inside the cylindrical frame so as to cover the inner periphery of the window. ,
A bent portion is formed to prevent the cylindrical frame from coming off, and the bent portion is embedded in the cylindrical frame during resin molding of the cylindrical frame to integrate the cylindrical frame and the non-magnetic metal member. A magnetic support device for a motor, which is characterized by being made of 7. In the sixth aspect of the motor, the non-magnetic metal member is formed by rolling a cylindrical plate, and the bent portions are formed at both circumferential ends of the plate. Magnetic support device. 8. In the sixth aspect, the non-magnetic metal member is formed by dividing a cylindrical member into halves, and the bent portion is provided at each circumferential end of the divided non-magnetic metal member. A magnetic support device for a motor formed by forming a motor. 9. A magnet support device that has a cylindrical frame body, a predetermined number of windows are formed on the circumferential surface of the cylindrical frame body, and an arc-shaped magnet is fitted into the windows, wherein the cylindrical A frame body is molded from synthetic resin, and a non-magnetic metal member is arranged inside the cylindrical frame body so as to cover the inner periphery of the window portion, and among the non-magnetic metal members, the cylindrical The cylindrical frame and the non-magnetic metal member are integrated by welding a portion in contact with the frame to the inner periphery of the cylindrical frame during resin molding of the cylindrical frame. Magnetic support device for the motor. 10. The motor according to any one of claims 1 to 9, wherein at least one reinforcing rib is provided on the inner periphery of the window in the axial direction of the cylindrical frame. Magnetic support device. 11. In any one of claims 1 to 10, the motor magnet support device supports a stator field pole magnet of a permanent magnet type motor,
A motor magnetic support device in which the outer periphery of the cylindrical frame and the inner periphery of the motor housing into which it is inserted are provided with positioning grooves and protrusions that engage with each other when the cylindrical frame is inserted. .