JP4516678B2 - Motor assembly structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor assembly structure formed by molding a printed wiring board, a stator or the like with an electrically insulating synthetic resin material.
[0002]
[Prior art]
FIG. 9 is a simplified cross-sectional view of a typical prior art mold motor (hereinafter motor) 51. Hereinafter, the configuration of the conventional motor 51 will be described with reference to FIG. In the motor 51, a coil 53 is wound around a stator core (hereinafter referred to as a core) 52, and a mold frame (hereinafter referred to as a frame) 54 is formed by molding with an electrically insulating synthetic resin material. is doing. A bearing housing 56 configured as a part of the frame 54 is provided on one side in the axial direction of the stator 55, and a bearing 57 is fitted into the bearing housing 56. The motor 51 also includes a bearing 58 on the opposite side of the stator 55 in the axial direction, and rotatably supports a metal rotary shaft 60 included in the rotor 59. Further, on the opposite side of the frame 54 from the bearing housing 56, a bracket 61 made of a metal plate, for example, by press working or the like, is attached by screws or the like, and the screws are screwed to screw seats embedded in the frame 54. Attached. The bracket 61 holds the bearing 58. In addition, a wiring board 64 is embedded in the frame 54, and a lead wire 67 that is connected via a coil 53, a Hall element, and a bushing 66 is attached. The rotary shaft 60 is attached by, for example, pressing a cylindrical metal bar into a component in which a conductive material such as a coil is mounted on the rotor core 69 after finishing the surface shape by cutting. A child 59 is configured.
[0003]
In such a molded motor 51, as a method for connecting and fixing the bracket 61 to the frame 54, in addition to the above-described screwing, caulking using a rivet or press-fitting of the bracket 61 into the frame 54, etc. Has been done.
[0004]
[Problems to be solved by the invention]
At this time, caulking using a rivet or press-fitting of the bracket 61 into the frame 54 is simple as a work process, but depending on the use of the motor 51, it may be difficult to use the motor 51 using such a method. . In such a case, there is a problem that it is necessary to change the structure of the motor 51 in order to employ a coupling method suitable for the application such as screwing, which requires a lot of labor.
[0005]
The present invention has been made in view of the above problems, and its purpose is to allow the mold frame and the bearing holding member to be fixed to each other by screwing without causing any special structural changes. It is an object to provide an assembly structure of a motor that can reduce the number of manufacturing steps.
[0006]
[Means for Solving the Problems]
An assembly structure of a motor according to a first aspect of the present invention includes a stator in which a coil is disposed on a core having a plurality of poles formed on a cylindrical inner peripheral side, and a rotor that is driven to rotate with respect to the stator. A rotating shaft fixed to the rotor, a printed wiring board disposed on one side in the axial direction of the rotor, a bracket for holding a bearing that rotatably supports the rotor, and a plurality of screw seats for fixing the bracket and member, Oite the motor and a motor frame which is configured by integrally molding the stator and the printed circuit board with an electrically insulating resin material, the screw seat member, and the locking portion of the elongated, the It consists of a screw seat part and an engaging part provided with a screw hole formed in one end part of the engaging part, and an engaging claw formed in the other end part of this engaging part, and a plurality of screw seat members are It is mounted in the gap between each stator coil and is held by the stator by the engaging part and engaging claw. , Brackets are to be fixed is screwed to the screw seat member relative to the mold frame.
[0007]
[Operation]
The motor assembly structure according to the first aspect of the present invention is configured by integrally molding a stator and a printed wiring board with an electrically insulating synthetic resin material. The rotation shaft of the motor is rotatably supported by a mold frame on the printed wiring board side, and is rotatably supported by a bearing on the opposite side of the mold frame from the mold frame in the axial direction. The bearing is held by a bearing holding member disposed on the opposite side of the stator from the mold frame in the axial direction. A screw seat member in which a screw hole is formed is fixed to the bearing holding member side of the stator, and the bearing holding member is fixed to the mold frame by being screwed to the screw seat member.
[0008]
Therefore, according to the present invention, even in a motor having a structure in which the stator or the mold frame is not particularly provided with a screw seat, the bearing holding member is screwed to the mold frame by using the screw seat member. Can be fixed. As a result, in the motor that is assumed to be connected by rivet caulking or press fitting the bearing holding member into the mold frame, etc., depending on the use of the motor, the caulking or press fitting is performed. Even if this is difficult, by using the screw seat member, both can be coupled with screws without changing the structure of the motor. Thereby, the manufacturing man-hour of a motor can be reduced significantly.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a plan view of a motor 1 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the section line X2-X2 in FIG. 1, and FIG. 3 is a bottom view of the motor 1. 4 is a side view of the vicinity of the stator 5 of the motor 1, FIG. 5 is a front view of a screw seat member 21 used in the motor 1, FIG. 6 is a side view of the screw seat member 21, and FIG. FIG. 8 is a rear view of the seat member 21, and FIG. 8 is a cross-sectional view taken along the section line X 5 -X 5 in FIG.
[0011]
Hereinafter, with reference to FIGS. 1-4, the outline of a structure of the motor 1 of a present Example is demonstrated.
[0012]
In the motor 1, a stator coil 3 is formed by winding a stator coil 3 around a stator core (hereinafter, core) 2. The stator coil 3 is configured by arranging a number of coils 3 a corresponding to the number of poles of the stator 5 set for each motor 1 in the circumferential direction and connecting them in a predetermined connection manner. Further, the core 2 and the stator coil 3 of the stator 5 are assembled to a holder 22 made of an electrically insulating synthetic resin material as an example, and the plurality of coils 3a are arranged with a gap 23 therebetween. For example, the stator 5 is molded with an electrically insulating synthetic resin material to form a mold frame (hereinafter referred to as a frame) 4.
[0013]
As shown in FIGS. 1 and 4, the holder 22 includes a holder main body 24 to which the stator coil 3 is mounted, a cylindrical portion 25 protruding in a cylindrical shape on one side in the axial direction of the holder main body 24, and a holder main body. 24 includes a cylindrical portion 26 that protrudes in a substantially cylindrical shape on the opposite side of the cylindrical portion 25, and a holding portion 27 that holds a wiring substrate 14, which will be described later, spaced from the stator coil 3. Consists of. The wiring board 14 is fixed to the holding portion 27 by the board holder 28. The holder 22 is formed with a gap 29 penetrating in the axial direction corresponding to the gap 23 of the stator coil 3.
[0014]
A bearing housing 6 formed integrally with the frame 4 is disposed on one side in the axial direction of the stator 5, and a bearing 7 is fitted into the bearing housing 6, so that the metal contained in the rotor 9 is made. The rotary shaft 10 is rotatably supported. Further, a bearing 8 is arranged on the opposite side of the rotor 9 from the bearing 7 in the axial direction, and rotatably supports the rotating shaft 10. On the other side of the bearing housing 6 of the frame 4, a bracket 11 as a bearing holding member is attached to the frame 4 with screws 12 as will be described later. A wiring board 14 to which the stator coil 3 is connected or a hall element (not shown) is attached is embedded in the frame 4, and a lead wire 17 drawn out via a pushing 16 is attached to the wiring board 14. It has been. A concave portion 18 is formed in the frame 4, and the bracket 11 is attached to the concave portion 18 and fixed by screws 12 as will be described later. The rotating shaft 10 is attached to the rotor core 19 by being press-fitted into a structure in which the coil 20 is mounted, so that the rotor 9 is configured.
[0015]
Hereinafter, the present embodiment will be described in detail with reference to FIGS. In the motor 1 of this embodiment, when the bracket 11 is fixed to the frame 4, a screw seat member 21 as shown in FIGS. 5 to 8 is used. The screw seat member 21 is integrally formed from an electrically insulating synthetic resin material or the like as an example. As shown in FIG. 1, the screw seat member 21 is disposed between the stator coils 3 for each pole of the stator 5. Mounted in the gap 29.
[0016]
As shown in FIGS. 5 to 8, the screw seat member 21 is formed in a cylindrical shape and has a screw seat portion 31 having a screw hole 30 in which an inner screw is engraved on the inner peripheral surface, and the gap 29 of the holder 22. The fitting portion 32 has a circumferential length corresponding to the circumferential length of the radially inner end portion, and is fitted to the inner circumferential end portion to prevent the screw seat member 21 from rattling. A connecting portion 33 formed integrally with the screw seat portion 31 on the opposite side of the fitting portion 32 with respect to the screw seat portion 31 and extending radially outward, and integrally formed on the radially outer side of the connecting portion 33. An engagement portion 34 that engages with the tubular portion 25 in a shape folded on the bracket 11 side shown in FIG. 2 and the cylindrical portion from the engagement portion 34 toward the wiring board 14 in the axial direction. The engaging portion 3 is extended to reach the length 26 and is formed with an engaging claw 35 that engages with the cylindrical portion 26 at the tip. It is configured to include and.
[0017]
In order to assemble the motor 1 having such a configuration, the stator core 2 and the stator coil 3 are assembled to the holder 22, and the wiring board 14 is fixed to the holding portion 27 of the holder 21 using the substrate holder 28. Further, the screw seat member 21 is attached to the holder 21. At this time, the locking portion 36 is inserted into the gap 29 of the holder 22 and the engaging claw 35 is engaged with the cylindrical portion 26 while the engaging portion 34 is engaged with the cylindrical portion 25 of the holder 22. Lock with. Thereafter, the stator 5 is molded with an electrically insulating synthetic resin material to form the frame 4. Thereafter, as shown in FIG. 2, in order to couple the bracket 11 to the frame 4, the screw 12 is inserted into the screw hole 30 of the screw seat portion 31 of the screw seat member 21 through the through hole formed in the bracket 11. Screw on.
[0018]
Therefore, according to the assembly structure of the motor 1 of this embodiment, even if the motor has a structure in which the stator 5 or the frame 4 is not provided with a screw seat in particular, the screw seat member 21 is used to 11 can be fixed to the frame 4 by screwing.
[0019]
As a result, it is difficult to perform the above-described caulking or press-fitting depending on the use of the motor in a motor that is assumed to be coupled with the bracket 11 and the frame 4 by caulking using a rivet or press-fitting the bracket 11 into the frame 4. Even in such a case, by using the screw seat member 21, the two can be coupled by screwing without changing the structure of the motor. Thereby, the manufacturing man-hour of the motor 1 can be reduced significantly.
[0020]
The present invention is not limited to the above-described embodiments, and includes a wide variety of modifications without departing from the spirit of the present invention.
[0021]
【The invention's effect】
In the motor assembly structure according to the first aspect of the present invention, a screw seat member having a screw hole is fixed to the bearing holding member side of the stator, and the bearing holding member is a screw seat member with respect to the mold frame. It was fixed with screws.
[0022]
Therefore, according to the present invention, even in a motor having a structure in which the stator or the mold frame is not particularly provided with a screw seat, the bearing holding member is screwed to the mold frame by using the screw seat member. Can be fixed. As a result, in the motor that is assumed to be connected by rivet caulking or press fitting the bearing holding member into the mold frame, etc., depending on the use of the motor, the caulking or press fitting is performed. Even if this is difficult, by using the screw seat member, both can be coupled with screws without changing the structure of the motor. Thereby, the manufacturing man-hour of a motor can be reduced significantly.
[Brief description of the drawings]
FIG. 1 is a plan view of a motor 1 according to an embodiment of the present invention.
2 is a cross-sectional view taken along section line X2-X2 in FIG. 1. FIG.
3 is a bottom view of the motor 1. FIG.
4 is a side view of the vicinity of a stator 5 of a motor 1. FIG.
FIG. 5 is a front view of a screw seat member 21 used in the motor 1;
6 is a side view of a screw seat member 21. FIG.
7 is a rear view of the screw seat member 21. FIG.
8 is a cross-sectional view taken along section line X5-X5 in FIG.
FIG. 9 is a simplified cross-sectional view of a typical prior art molded motor 51. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Motor 3 Stator coil 4 Frame 5 Stator 7, 8 Bearing 9 Rotor 10 Rotating shaft 11 Bracket 12 screw 14 Wiring board 21 Screw seat member 22 Holder 23, 29 Gap 30 Screw hole 31 Screw seat portion 32 Fitting portion 33 Connecting part 34 Engaging part 35 Engaging claw 36 Locking part

Claims (1)

A stator in which a coil is arranged in a core having a plurality of poles formed on a cylindrical inner peripheral side ;
A rotor driven to rotate relative to the stator;
A rotating shaft fixed to the rotor;
A printed wiring board disposed on one side in the axial direction of the rotor;
A bracket for holding a bearing that rotatably supports the rotor;
A plurality of screw seat members for fixing the bracket;
A motor frame configured by integrally molding the stator and the printed wiring board with an electrically insulating resin material;
Oite to the motor with a,
The screw seat member is formed at a long locking portion, a screw seat portion and an engaging portion having a screw hole formed at one end portion of the locking portion, and the other end portion of the locking portion. With engaging claws,
The plurality of screw seat members are mounted in the gaps between the stator coils, and are held by the stator by the engagement portions and the engagement claws.
The bracket is fixed to the mold frame by being screwed to the screw seat member .

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