JPH0965602A - Small motor - Google Patents

Abstract

(57) [PROBLEMS] To provide a small motor in which each component is easily manufactured with a simple structure and can be easily assembled and disassembled. SOLUTION: A rotor 14 provided with a magnet 14b rotatably supported on a rotating shaft 14a, a case 11 fixedly arranged around the rotor, and wound in advance so as to face the rotor. Winding coil 15 fixedly arranged inside the case at equal angular intervals around the rotation axis
And an intermediate frame 17 fixedly arranged in the case and provided with positioning engaging portions 17a into which the respective winding coils are inserted in the radial direction, and holding the winding coils in the respective engaging portions of the intermediate frame. And a restraining member 18 for controlling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small motor having a stator structure having a large number of winding coils.

[0002]

2. Description of the Related Art Conventionally, there are various types of small-sized or medium-sized motors, but the structure is generally complicated, and components such as magnets, iron cores and coils cannot be easily divided or disassembled. In a small-sized or medium-sized motor, when an iron core is used, an iron core composed of an integral core is adopted. There is a so-called split type in which the integrated core is configured to be split later, but in that case, the yoke integrated core is formed into a shape suitable for splitting, and then is split by cutting. . On the other hand, in a large-sized motor, a split type is generally used, which is configured by attaching an iron core to a yoke, but the attachment is performed by screws, tacks, press fitting, or the like.

Further, in a medium- or large-sized motor, the space in the motor is often used for heat dissipation, and in a small motor, an AC motor is rarely used, so that the number of coils is small. For this reason, the disassembly or division structure has not been fully examined.

[0004]

For this reason, in a motor having a non-disassembled or divided structure, it is difficult to wind the winding coils in an aligned manner, and the operation requires some free space in the case of the motor. . Therefore, there is a problem that the space factor of the parts in the case is reduced and the volume efficiency is deteriorated. Furthermore, when the wire diameter of the coil winding of a small motor becomes thin, this space factor problem becomes a major factor in determining the performance of the motor. However, in the conventional motor, there is a problem that maintenance cannot be easily performed because each component and its assembly are complicated and cannot be easily manufactured, and disassembly is difficult.

In view of the above points, an object of the present invention is to provide a small-sized motor having a simple structure in which each component can be easily manufactured and can be easily assembled and disassembled.

[0006]

According to the present invention, the above object is to provide a rotor provided with a magnet rotatably supported with respect to a rotating shaft, a case fixedly arranged around the rotor, and a rotor. A plurality of winding coils fixedly arranged inside the case at equal angular intervals around the rotation axis so as to face the outside, and fixedly arranged in the case;
And a small motor that includes an intermediate frame that includes a positioning engaging portion into which each of the winding coils is inserted, and a holding member that holds the winding coil in each of the engaging portions of the intermediate frame. Is achieved.

According to the above construction, each winding coil is inserted into the engaging portion of the intermediate frame in the radial direction and is held in the engaging portion by the restraining member. As a result, by inserting the intermediate frame into the case, the winding coils are arranged at predetermined positions in the case.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS.
The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are added. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

FIG. 1 shows a first embodiment of a small motor according to the present invention. In the figure, a small motor 10
Is provided with a hollow cylindrical yoke 11. Both ends of the yoke 11 are closed by the covers 11 and 12. A cover 1 is provided near the center of the yoke 11.
A rotor 14 supported by 1, 12 is provided.

Coils 15 are arranged on the inner surface of the yoke 11 at equal angular intervals. An iron core 16 is inserted in each coil 15, and the iron core 16 and the coil 15 are positioned by an intermediate frame 17 and held by a holding plate 18 as a holding member.

Each constituent member will be described in detail. York 11
2, has a hollow cylindrical shape, doubles as a case, and is made of a magnetic material. Also,
The covers 12 and 13 are attached to both ends of the yoke 11, and have bearings 12a and 13a at their centers for rotatably supporting the rotor 14. As a result, the rotor 14 moves toward the yoke 11 as shown in FIG.
Will be located near the center of the.

The rotor 14 is a rotary shaft 1 rotatably supported by bearings 12a and 13a of the covers 12 and 13.
4a and a plurality of magnets 14b mounted around the rotation shaft 14a at equal angular intervals around the center thereof. Here, each magnet 14b is attached so that the direction of its magnetic flux extends in the radial direction with respect to the rotating shaft 14a.

As shown in FIG. 1, a plurality of coils 15 are provided around the rotary shaft 14a at equal angular intervals (in the illustrated case,
Six coils 15 are provided. In this case, each coil 15 has its winding wound around the bobbin in advance.

The iron core 16 is made of a magnetic material, and one end (the end portion on the outer side in the radial direction) is greatly expanded, and the other end is slightly expanded, and the other end is each coil. It is inserted in the hollow portion of the bobbin of 15.

Further, the small motor 10 is provided with the intermediate frame 17 and the pressing plate 18 as described above. The intermediate frame 17, as shown in FIGS. 4 and 5,
It is formed of a non-magnetic material into a hollow cylindrical shape, and has a through hole 17a for positioning each coil 15.
The holes 17a are arranged at equal angular intervals with respect to the central axis, and in the illustrated case, six holes 17a are provided. As a result, as shown on the left side of FIG. 4, the coil 15 in which the iron core 16 is inserted is inserted into the hole 17 a of the intermediate frame 17.
By being inserted from the outside in the radial direction, the coils 15 are positioned at predetermined positions at equal angular intervals with respect to the intermediate frame 17.

As shown in FIG. 6, the restraining plate 18 is a substantially rectangular flat plate and is made of an elastic material such as soft resin. A hole 18a into which the iron core 16 is inserted is provided in the center of the pressing plate 18. This hole 18a is open on one side via a slit 18b. The tip side of the slit 18b is provided with a taper so that the iron core 16 can be easily inserted. As a result, the restraining plate 18 is laterally inserted between the coil 15 and the enlarged flange-shaped portion of the iron core 16 inserted in the coil 15, as shown in FIG. . Here, when the coil 15 is inserted into the hole 17a of the intermediate frame 17, the pressing plate 18 is
By contacting the periphery of the hole 17a of the intermediate frame 17, the radial position of the coil 15 is regulated.

The small motor 10 according to this embodiment is configured as described above, and its operation will be described below. In the case of the first assembly, the iron core 16 is inserted into each coil 15, and the restraining plate 18 is inserted between the coil 15 and the enlarged portion of the iron core 16. From this state, each coil 15
When inserted into each hole 17a of the intermediate frame 17 from the outside in the radial direction, each coil 15 is guided by each hole 17a of the intermediate frame 17 so as to be positioned in the axial direction and the circumferential direction and to be restrained. The plate 18 will provide radial positioning.

Thus, as shown in FIG. 7, the coils 15 are arranged at equal angular intervals with respect to the rotating shaft 14a of the rotor 14 and the other end of the iron core 16 is at a predetermined interval from the surface of the rotor 14. Is installed. At this time, each coil 15 is accurately positioned by a simple operation of inserting it into each hole 17a of the intermediate frame 17 without adjusting the positioning.

In this way, each coil 15 and iron core 1
6 and intermediate frame 17 with restraining plate 18 incorporated
Is axially inserted inside the yoke 11. As a result, the coils 15 and the iron core 16 are arranged at predetermined positions in the yoke 11.

Further, the rotor 14 is provided at the center of the yoke 11.
Is inserted and both ends of the yoke 11 are closed by the covers 12 and 13. At this time, the bearing 12 of the covers 12 and 13
By inserting the rotary shaft 14a of the rotor 14 into the rotors 14a and 13a, the rotor 14 can rotate the bearing 1 of the covers 12 and 13.
It is rotatably supported by 2a and 13a. Thus, the assembly of the small motor 10 is completed.

Here, by appropriately energizing each coil 15 from an external power source (not shown), each coil 1
When a magnetic flux is generated in 5, the magnetic flux acts on the magnet 14a of the rotor 14 via the iron core 16 and the yoke 11, and the rotor 14 is rotated.

When the small motor 10 is disassembled, the covers 12 and 13 are removed from the yoke 11, the rotor 14 is pulled out from the inside of the yoke 11, and the intermediate frame 17 is further taken out from the inside of the yoke 11.
Each coil 15 will be easily disassembled together with the iron core 16. When reassembling, the intermediate frame 17
The simple work of just inserting the
Each coil 15 is accurately positioned at a predetermined position in the yoke 11.

FIG. 8 shows a modification of the above-mentioned restraining plate. In FIG. 8, in the restraining plate 19, the restraining plate portion 19a for each coil 15 is integrated by a joint node portion 19b formed of a bendable elastic body, and each restraining plate portion 19a is A bobbin 19c for winding the coil 15 is integrally formed. As a result, the coil 15 is formed on the bobbin 19c of each restraint plate portion 19a by the same winding work as in the conventional case. Therefore, the number of parts is small, and the assembling work and the disassembling work are simplified.

9 and 10 show a modification of the above-mentioned intermediate frame. 9 and 10, the intermediate frame 20 is the intermediate frame 1 shown in FIGS. 4 and 5.
Similar to 7, it is formed in a hollow cylindrical shape, and each coil 15
Is provided with a positioning hole 20a. Further, the intermediate frame 20 is closed at one end, and a bearing hole 22 for receiving a bearing is provided at the center of the end portion 21, and the end portion is provided outside the cylindrical portion 20b. 21
A wiring hole 23 through which the winding end of each coil 15 passes is provided at a position corresponding to each hole 20a. The wiring hole 23 is provided with a notch 23a opened outward so that the winding end of each coil 15 can easily pass therethrough.

According to the intermediate frame 20 having such a structure, each coil 15 has a cylindrical portion 20b of the intermediate frame 20, similar to the intermediate frame 17 shown in FIGS.
Is inserted from the outside in the radial direction into the positioning hole 20a provided in the
Of the winding wire is drawn out to the outside of the end portion 21 of the intermediate frame 20 through the wiring hole 23 of the intermediate frame 20. This facilitates the connection of the winding ends of each coil 15.

11 and 12 show a second embodiment of the small motor according to the present invention. 11 and 12
In FIG. 3, the small motor 30 is configured as a flat motor that does not use an iron core, and includes a stator substrate 31 and a plurality of coils (six coils in the case shown) annularly arranged on the stator substrate 31. 32, a disk-shaped rotor 33 that is rotatably supported so as to face the stator substrate 31, and covers 34 and 35 that cover both surfaces of the stator substrate 31, respectively.
And an intermediate frame 36 for positioning the coil 32 at a predetermined position, and a retaining ring 37 as a retaining member for retaining the coil 32 with respect to the intermediate frame 36.

The stator substrate 31 is formed in a flat plate shape, and on one surface (the right surface in the case shown) of the stator substrate 31, the coils 32 are arranged around the center at equal angular intervals.

As shown in FIG. 11, a plurality of coils 32 are provided at equal angular intervals around the central axis (6 coils in the case shown).
Individual) coils 32 are provided. In this case, each coil 32 has a flat outer shape, and its winding is wound around the bobbin in advance.

The rotor 33 includes a rotary shaft 33a rotatably supported by the covers 34 and 35, and a rotary shaft 33a.
In the vicinity of the center of the disk, a disk-shaped magnet 33b, which is magnetized in multiple poles at equal angular intervals, is provided around the disk. Here, the rotating shaft 33a is attached to the magnet 33b by, for example, press fitting.

Further, the covers 34 and 35 are attached to both surfaces of the stator substrate 31, and a bearing 34 for rotatably supporting the rotor 33 is provided at the center thereof.
a, 35a. As a result, the rotor 33 is
As shown in FIG. 11, it is arranged near the center of the stator substrate 11.

As shown in FIGS. 15 and 16, the intermediate frame 36 is formed of a non-magnetic material into a disc shape, and has an engaging edge portion 36a extending axially from the peripheral edge thereof. The engagement edge portion 36a has a groove 36b for positioning each coil 32. The grooves 36b are arranged at equal angular intervals with respect to the central axis, and in the case of the drawing,
Six concave grooves 36b are provided. As a result, the coils 32 are inserted into the concave grooves 36b of the intermediate frame 36, whereby the coils 32 are positioned at predetermined positions at equal angular intervals with respect to the intermediate frame 36.

The holding ring 37 as a holding member is formed of an elastic material in an annular shape and a part thereof is cut. As a result, when the retaining ring 37 is inserted inside the coil 32 that is engaged in each groove 36b of the intermediate frame 36, the inner edge portion of the coil 32 is
It will be pressed outward in the radial direction. here,
By holding each coil 32 in each groove 36b of the intermediate frame 36, the retaining ring 37 regulates the radial position of the coil 32.

According to the small motor 30 having the above-described structure, in the case of the first assembly, when the coils 32 are inserted into the grooves 36b of the intermediate frame 36 from the inside in the radial direction, the coils are 32 is each concave groove 36 of the intermediate frame 36.
Positioning in the axial direction and the circumferential direction is performed by b, and positioning is performed by the retaining ring 37 in the radial direction. Thus, as shown in FIG. 15, the coils 32 are arranged at equal angular intervals with respect to the rotation shaft 33a of the rotor 33, and the inner edges thereof are arranged at predetermined radial positions. At this time, each coil 32 is accurately positioned by a simple operation of inserting it into each groove 36b of the intermediate frame 36 without adjusting the positioning.

In this way, the intermediate frame 36, in which the coils 32 and the retaining ring 37 are incorporated, is placed on the stator substrate 31 and fixedly held. This allows
Each coil 32 is arranged at a predetermined position in the yoke 11.

Further, both surfaces of the stator substrate 31 are closed by the covers 34 and 35. At this time, the cover 34,
To the bearings 34a, 35a of the rotor 35,
By the insertion of a, the rotor 33 becomes
It is rotatably supported by the bearings 34a and 35a of 4,35. Thus, the assembly of the small motor 30 is completed.

Here, by appropriately energizing each coil 32 from an external power source (not shown), each coil 3
When a magnetic flux is generated in 2, the magnetic flux acts on the magnet 33a of the rotor 33, and the rotor 33 is rotated.

When the small motor 30 is disassembled, the covers 34 and 35 are removed from the stator substrate 31, the rotor 33 is removed, and the intermediate frame 36 is taken out from the surface of the stator substrate 31 to remove each coil. 32 will be easily disassembled.
At the time of reassembling, the intermediate frame 36 is simply placed on the stator substrate 31 again,
Each coil 32 is accurately positioned at a predetermined position on the stator substrate 31.

FIG. 16 shows a modification of the intermediate frame 36 and the retaining ring 37. In FIG. 16, the intermediate frame 36 and the retaining ring 37 are integrated by being connected to each other via a connecting portion 38.
As a result, the coil mounting position of the intermediate frame 36 has a cell structure, so that the coil 32 is accurately positioned with respect to the intermediate frame 36.

In the small motor 30 described above, the intermediate frame 36 has an engaging edge portion 36a extending from the peripheral edge to one side.
Although the coil 32 is held by the above, the present invention is not limited to this, and by using two intermediate frames 36 having such a configuration, the engaging edge portions 36a are opposed to each other, and each coil 32 is provided on both sides. Obviously, it may be sandwiched between.

In the above embodiment, the coil 1
In each case, 5 and 32 are provided, but
Not limited to this, it is obvious that the present invention can be applied to a small motor having a large number of coils of 6 or more.

[0041]

As described above, according to the present invention, it is possible to provide a small motor in which each component can be easily manufactured with a simple structure and can be easily assembled and disassembled. become.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a small motor according to the present invention.

FIG. 2 is a partially cutaway side view of the small motor of FIG.

FIG. 3 is a front view of a rotor and a yoke in the small motor shown in FIG.

FIG. 4 is a cross-sectional view showing a relationship between an intermediate frame and a winding coil in the small motor shown in FIG.

5 is a side view of the intermediate frame of FIG. 6. FIG.

6A and 6B are a side view and a plan view showing a holding plate in the small motor of FIG.

7 is a schematic front view showing the relationship between the rotor, the coil, the iron core, and the holding plate in the small motor of FIG.

8A and 8B are a side view and a plan view showing another configuration of the holding plate in the small motor of FIG.

9 is a front view showing another configuration of the intermediate frame in the small motor of FIG. 1. FIG.

10 is a partially cutaway side view of the intermediate frame of FIG.

FIG. 11 is a front view showing a second embodiment of the small motor according to the present invention.

12 is a side view of the small motor of FIG.

13 is a front view of an intermediate frame and a retaining ring in the small motor of FIG.

14 is a side view of the intermediate frame and the retaining ring of FIG.

15 is a schematic front view showing a relationship between a coil and a rotor in the small motor shown in FIG.

16 is a front view showing a modified example of the intermediate frame and the pressing plate of FIG.

[Explanation of symbols]

 10 small motor 11 yoke (case) 12, 13 cover 12a, 13a bearing 14 rotor 14a rotating shaft 14b magnet 15 coil 16 iron core 17 intermediate frame 17a positioning hole 18 retaining plate 18a hole 18b slit 19 retaining plate 19a individual retaining plate Part 19b articulation part 19c bobbin 20 intermediate frame 20a positioning hole 21 end 22 bearing hole 23 wiring hole 30 flat small motor 31 stator substrate 32 coil 33 rotor 33a rotating shaft 33b magnet 34, 35 cover 34a, 35a bearing 36 intermediate Frame 37 Holding ring 38 Connection part

Claims (5)

[Claims] 1. A rotor provided with a magnet rotatably supported with respect to a rotating shaft, a case fixedly arranged around the rotor, and an equal angle around the rotating shaft so as to face the outside of the rotor. A plurality of winding coils fixedly arranged inside the case at intervals, and a positioning engaging portion fixedly arranged in the case and into which each winding coil is inserted are provided. A small motor comprising: an intermediate frame; and a holding member for holding the winding coil in each engaging portion of the intermediate frame. 2. The positioning engaging portion for each of the winding coils is a hole or a groove.
Small motor described in. 3. The small motor according to claim 1, wherein the holding member is made of an elastic body and is inserted between the winding coil and the iron core. 4. A restraining member for each of the winding coils comprises:
The small motor according to claim 1, wherein the small motors are integrated by being connected to each other. 5. The small motor according to claim 1, wherein the intermediate frame includes a wire guide portion for each winding coil.