KR20000010510A - Fan motor - Google Patents

Abstract

PURPOSE: A fan motor in which the number of parts is small and adhesion of a motor frame is simple, is provided to overcome inconvenience occurred due to lots of parts and improve work efficiency. CONSTITUTION: A fan motor including; a stator body (35) having a stator core (26) to which a coil (29); a bearing blanket (17) inserted with pressure from one direction of an axial direction in an internal circumference; a bearing (22) mounted on the bearing blanket (17); a rotational axis 38 which is rotatably supported by the bearing (22) and rotates a fan (42); and a motor frame (11) formed between the stator body (35) and the bearing blanket (17), wherein the adhesion work becomes simple and the number of parts becomes small since the motor frame (11) is adhered firmly to the stator body (35).

Description

Fan motor

The present invention relates to a fan motor for sending wind by rotating the fan.

The conventional configuration of the fan motor will be described based on FIG. 8. The front frame 1a and the rear frame 1b are joined by a plurality of screws 2, and the front frame 1a and the rear frame 1b are mounted with rubber bushes 3, respectively, and the two bushes 3 The stator core 4 is sandwiched between the). The rotor is accommodated in the inner circumferential portion of the stator core 4, and the fan 6 is fixed to the rotation shaft 5 of the rotor.

In the case of the said structure, the stator core 4 is clamped by the set of motor frames 1a and 1b. For this reason, the number of parts increases and the cumbersome work of screwing between the motor frames 1a and 1b is needed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a fan motor having a small number of parts and a simple attachment operation of a motor frame.

1 is a view showing an embodiment of the present invention,

1 (a) is a cross-sectional view showing the entire configuration except the bell mouse,

(B) is sectional drawing along the line X1-X1,

(C) is a cross-sectional view showing an enlarged X2 part,

2 (a) is a view seen from the arrow X3 direction showing the motor frame,

(B) is sectional drawing along the X4-X4 line | wire,

3 is a perspective view showing the wide stay and connector cover in an exploded state,

Figure 4 (a) is an enlarged cross-sectional view showing the rear bearing assembly,

4 (b) is a cross-sectional view showing an enlarged X5 part;

4 (c) is a cross-sectional view showing an enlarged X6 part;

5A is a view of the stator core as seen from the arrow X7 direction,

(B) is sectional drawing along the X8-X8 line,

5C is an enlarged view of the steel plate of the X9 part;

5 (d) is an enlarged view of the steel plate of the X10 part;

FIG. 6 is an enlarged cross-sectional view of part X11 of FIG. 1A;

(A) is sectional drawing along the X12-X12 line which shows a collar,

(B) is a view seen from the arrow X13 direction and

8 is a diagram corresponding to FIG. 1 showing a conventional configuration.

* Explanation of symbols for the main parts of the drawings

11: Motor frame 11a: Bracket press-in hole (press-in part)

11b: rib (projection part) 11c: hook (engaged part)

11d: recessed part (fitting part) 12, 13: stay

14: Bell Mouse 14a: Attachment

17: Bearing bracket 17d: Holding part (hanging part)

22: bearing metal (bearing) 26: stator core

26a: steel plate (magnetic plate) 26b: bari

26c: protrusion 29: coil

30: terminal block 30a: connector portion

31: conductive plate (terminal) 33: connector cover

34: mold layer 34a: hook portion (hanging portion)

34b: rib (fitting part) 34d: tube part

35: Stator assembly (stator body) 38: rotating shaft

42: fan

The fan motor according to claim 1 includes a stator body having a stator core wound with a coil, a bearing bracket inserted from one direction in an axial direction on an inner circumferential surface of the stator core, a bearing mounted on the bearing bracket, and a rotation on the bearing. It is characterized in that it comprises a rotating shaft that is possibly supported to rotationally drive the fan, and a motor frame sandwiched between the stator body and the bearing bracket.

According to the above means, the motor frame is sandwiched between the stator body and the bearing bracket. For this reason, since the motor frame is attached to the stator main body with sufficient strength without screwing between a pair of motor frames to fit the stator main body, the attachment operation of the motor frame is simplified and the number of parts is small.

The fan motor of Claim 2 is characterized by the bell mouse which surrounds a fan through a some stay in the motor frame.

According to the above means, it is not necessary to form a bell mouth on the mounting surface of the motor frame, so that the shape of the mounting surface is simplified.

The fan motor according to claim 3 is characterized in that a connector portion for feeding a coil is superimposed on a predetermined stay and provided in the stator main body.

According to the said means, since the connector part of a stator main body is superimposed on a predetermined stay, a connector part becomes a blowing resistance, and the blowing ability of a fan is prevented from falling under the influence of a connector part.

The fan motor according to claim 4 is characterized in that a hole-shaped insertion portion having a projection on an inner circumferential surface is provided in the motor frame, and a bearing bracket is inserted into the insertion portion.

According to the above means, since the bearing bracket is inserted into the insertion portion of the motor frame, shaking of the bearing bracket with respect to the motor frame is prevented.

The fan motor according to claim 5 is characterized in that the engaging portion for engaging the motor frame is provided in the bearing bracket.

According to the above means, since the engaging portion of the bearing bracket is engaged with the motor frame, the bearing bracket is prevented from escaping from the motor frame and the stator body due to vibration during operation or the like.

The fan motor according to claim 6 is provided with a plurality of engaging portions provided in the outer circumference of the stator body, and a plurality of engaging portions in which the plurality of engaging portions are respectively engaged in the motor frame, wherein the engaging portions or the respective engaging portions are provided. The fit portion is characterized in that it has a leg shape overlapping the outer circumferential surface of the motor frame or the outer circumferential surface of the stator body.

According to the said means, since the some engaging part located in the outer peripheral part of the stator main body is engaged with the engaged part of the motor frame, the perpendicularity with respect to the motor frame of the stator main body becomes high. Further, since each engaging portion or each engaging portion has a leg shape overlapping the outer circumferential surface of the motor frame or the outer circumferential surface of the stator body, the verticality with respect to the motor frame of the stator body is further increased.

The fan motor according to claim 7 has a fitting portion provided on the end face of the stator body on the motor frame side and a fitting portion on which the fitting portion is fitted on the end face of the stator body side of the motor frame, and the fitting portion and the blood pin. There is a feature in that the fitting portion forms a ring shape.

According to the said means, the stator main body is positioned in a careful state to the motor frame only by fitting the fitting part of the stator main body to fit the fitting part of a motor frame. In addition, since sealing is performed between the fitting portion and the fitting portion, it is difficult for water to penetrate into the interior from the interface between the stator main body and the motor frame.

The fan motor according to claim 8 has a tube portion in which another bearing bracket is inserted into the inner circumferential surface of the stator core from another direction in the axial direction, and another bearing bracket is inserted into a cross section of the other bearing bracket side of the stator body. It is characterized by.

According to the said means, since the other bearing bracket is inserted in the cylindrical part of the stator main body, it becomes difficult for water to penetrate inside from between the other bearing bracket and the stator main body.

The fan motor according to claim 9 is characterized in that a connector portion for feeding a coil is provided in the stator main body, and the terminal of the connector portion is covered by a connector cover.

According to the said means, since the terminal of a connector part is covered by the connector cover, water contact with a terminal is prevented.

The fan motor according to claim 10 is characterized in that the connector portion for feeding the coil is provided in the stator main body so that the opening portion faces downward.

According to the said means, even if water intrudes into a connector part, it flows through an opening part of a connector part, for example, and water is prevented from accumulating in a connector part.

The fan motor according to claim 11, wherein a terminal block having a conductive plate electrically connected to the coil is provided on one end side or the other end side of the stator main body, and the connecting portion of the conductive plate and the coil is covered by a mold layer made of resin. There is a characteristic in point.

According to the said means, since the connection part of a conductive plate and a coil is covered by the mold layer made of resin, moisture adheres to both connection parts, and the insulation performance is prevented from deteriorating.

The fan motor according to claim 12 is characterized in that a bell mouse surrounding the fan is provided in the motor frame through four stays, and three attachment parts located in the circumferential direction with respect to each stay are provided in the bell mouse.

According to the above means, since the bell mouse is supported on the installation surface by three points, the bell mouse is easily attached to the installation surface without being affected by the bending of the installation surface. In addition, since a difference occurs between the vibration state of the stay during operation and the vibration state of the bell mouse, the amplification of both vibration sounds is prevented from overlapping.

The fan motor according to claim 13 is characterized in that the stator core is formed by stacking magnetic plates in the axial direction, and the bars of the magnetic plates located on both sides of the axial direction are directed to the opposite side.

According to the above means, in inserting the bearing bracket into the inner circumferential surface of the stator core, the bearing bracket is prevented from being caught by the barrier, thereby improving the workability of inserting the bearing bracket.

The fan motor according to claim 14 is characterized in that the protrusions are distributed on the inner circumferential surface of the stator core.

According to the above means, when the bearing bracket is inserted into the inner circumferential surface of the stator core, the protrusions distributed in the circumferential direction tighten the outer circumferential surface of the bearing bracket, making it difficult for the bearing bracket to escape from the stator core. In addition, since the bearing bracket is partially inserted into the inner circumferential surface of the stator core, the bending during insertion of the bearing bracket is prevented.

The fan motor according to claim 15 is characterized in that a plurality of projections are provided at substantially equal pitch on the inner circumferential surface of the stator core.

According to the above means, when the bearing bracket is inserted into the inner circumferential surface of the stator core, the plurality of protrusions tighten the outer circumferential surface of the bearing bracket, making it difficult for the bearing bracket to escape from the stator core. In addition, since the symmetry is generated at the position at which the bearing bracket is pressed by the plurality of protrusions and the bearing bracket is elastically balanced at the time of insertion, insertion workability of the bearing bracket to the stator core is improved.

Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 7. In addition, the present embodiment applies the present invention to a fan motor which is blown into a refrigerator after blowing air into an everpolator of a refrigerator to cool it.

First, in FIG. 1A, the motor frame 1 has a cylindrical shape in which a right end surface is closed, and a bracket insertion hole 11a is formed in the motor frame 11. The bracket insertion hole 11a corresponds to the insertion portion, and the inner circumferential surface of the bracket insertion hole 11a has a circular annular rib 11b corresponding to the projection portion as shown in Fig. 4C. Is integrally formed. In addition, the motor frame 11 is formed of polyphthylene telephthalate (PBT).

On the outer circumferential surface of the motor frame 11, three narrow stays 12 and one wide stays 13 extending in the radial direction are integrally formed as shown in FIG. Each stay 12 having a narrow width of the former has a flat plate shape. The latter wide stay 13 has a connector accommodating portion 13a and a lead wire accommodating portion 13b as shown in Fig. 3, and the connector accommodating portion 13a has a cross-sectional inverted c shape with one side opening. The lead wire accommodating portion 13b has a cross-sectional inverted c-shape in which one surface opposite to the connector accommodating portion 13a is opened. 3 has shown the cross-sectional shape of the connector accommodating part 13a and the lead wire accommodating part 13b.

As shown in (a) of FIG. 2, a bell mouse 14 is integrally formed with the tip of the three stays 12 and the tip of the one stay 13. The bell mouse 14 has a cylindrical shape in which both end surfaces thereof open, and three attachment portions 14a are integrally formed on the outer circumferential surface of the bell mouse 14. Each of the attachment portions 14a forms a plate shape, and each of the attachment portions 14a is formed with a cutout portion 14b that opens to the outer circumferential side. In each cutout 14b, a rubber bush 15 is pushed in and each bush 15 is fixed to the wall of the refrigerator.

The shaft housing portion 17a of the bearing bracket 17 is press-fitted into the inner circumferential surface of the rib 1b of the motor frame 11 as shown in Fig. 4A. The bearing bracket 17 is formed by drawing a metal plate and has a cylindrical shaft housing portion 17a and a round plate-shaped metal housing portion 17b. On the outer circumferential surface of the former shaft accommodating portion 17a, a concave portion 17c is formed as shown in Fig. 4C, and the rib 11b of the motor frame 11 is formed in the concave portion 17c. Is hooked up. In the latter metal storage portion 17b, as shown in Fig. 4B, a circular ring-shaped catching portion 17d is formed integrally with the outer circumferential surface thereof. This gripping portion 17d corresponds to the engaging portion and is engaged with the inner circumferential surface of the motor frame 11. (Tightening)

As shown in (a) of FIG. 4, the metal housing 17b of the bearing bracket 17 is fitted with a cover 18 made of metal and fitted on the inner circumferential surface thereof. The opening is covered by a cover 18. The cover 18 is integrally formed with a projection-shaped spring mounting portion 18a, and a thrust plate 19 made of nylon is fixed to the spring mounting portion 18a.

The left end of the pressing spring 20 is fitted to the outer circumferential surface of the spring mounting portion 18a. The pressing spring 20 is composed of a compression coil spring, and a metal pressing portion 21 made of metal is mounted on the right end of the pressing spring 20. The bearing metal 22 has an outer surface in an arc shape, and the metal pressing portion 21 is engaged with the outer circumferential surface of the bearing metal 22 by the elastic force of the pressing spring 20 to hold the bearing metal 22. It is attached to the inner circumferential surface of the bearing bracket 17 by pressing.

In the metal housing 17b of the bearing bracket 17, a circular annular felt 23 is disposed on the bottom surface and a cylindrical felt 24 is disposed on the inner circumferential surface of the cover 18. . Lubricating oil is injected into these felts 23 and 24, and the bearing metal 22 is lubricated by the lubricating oil which oozes out from the felts 23 and 24. FIG. Further, reference numeral 25 denotes a bearing bracket 17, a cover 18, a thrust plate 19, a pressing spring 20, a metal pressing part 21, a bearing metal 22, and felts 23 and 24. After the bearing assembly is shown.

The stator core 26 is attached to the right end of the bearing bracket 17 as shown in Fig. 1A. The stator core 26 is formed by stacking a plurality of sheets of steel sheet 26a in the axial direction as shown in FIG. 5B, and the steel sheet 26a located in one direction of the axial direction is shown in FIG. As shown in FIG. 5, the steel plate 26a provided so that the bar 26b generated at the time of punching faces the other direction side and is located at the other direction side in the axial direction is shown at the time of punching as shown in FIG. The generated bar 26b is provided so as to face one direction side. In addition, the steel plate 26a is corresponded to a magnetic plate.

Three protrusions 26c are formed on the inner circumferential surface of the stator core 26 as shown in Fig. 5A. The projections 26c are arranged at equal pitches of 120 °, and the inner circumferential surfaces of the three projections 26c have a shaft accommodating portion of the bearing bracket 17 from the left side as shown in Fig. 1 (a). 17a) is press-fitted. In addition, reference numeral 26d in FIG. 5A shows the teeth of the stator core 26.

The stator core 26 is covered with an insulating cover 27 made of PBT from both sides in the axial direction as shown in Fig. 1A. These two insulating covers 27 cover the entirety of the plurality of teeth 26d except for the inner and outer circumferential surfaces thereof, and only three pin terminals 28 (only one) are provided on the left-side insulating cover 27 as shown in FIG. It is fixed).

In the stator core 26, coils 29 of each of the U, V, and W phases are wound from above the two insulating covers 27. The coil 29 of each phase is formed by continuously winding one magnet wire to three teeth 26d, one end of the three magnet wires is commonly connected, and the other end of the three magnet wires to the pin terminal 28, respectively. It is wound (so-called Y connection).

As shown in Fig. 1A, a terminal block 30 made of PBT is assembled on the insulating cover 27 on the left side, and a connector portion 30a is integrally formed on the terminal block 30. The connector portion 30a has a box shape in which the lower surface is opened, and is housed in the connector housing portion 13a of the wide stay 13 and covers the opening on the right side of the connector housing portion 13a.

In the terminal block 30, a plurality of conductive plates 31 (only one is shown) are embedded by insert molding. Each of the conductive plates 31 corresponds to a terminal of the connector portion 30a, and a lower end portion thereof is led out of the connector portion 30a. Each of the conductive plates 31 is provided with a through hole 31a as shown in FIG. 6, and each pin terminal 28 is inserted into the through hole 31a and soldered to the conductive plate 31.

The connector 32 is fitted to the connector portion 30a of the terminal block 30, as shown in Fig. 1A, and the lower end of each conductive plate 31 is a terminal of the connector 32 (not shown). Is electrically connected). A lead wire 32a is connected to each terminal (not shown) of the connector 32, and each lead wire 32a passes through the connector housing portion 13a of the wide stay 13, and the lead wire storage portion 13b. It is housed inside.

In the wide stay 13, as shown in Fig. 1B, a connector cover 33 made of PBT is fitted to the inner surface of the lead wire accommodating portion 13b. The connector cover 33 forms a cross-sectional inverted c-shape, and the engaging portion 33a is integrally formed at the upper end of the connector cover 33 as shown in FIG. 3.

In the wide stay 13, as shown in Fig. 1A, the concave portion 13c is formed in the connector housing portion 13a. The fitting part 33a of the connector cover 33 is fitted in this recessed part 13c, and the upper end part of the connector cover 33 overlaps the lower end part of the connector accommodating part 13a. Moreover, the seal board part 13d is integrally formed in the lower end part of the connector accommodating part 13a, and the seal board part 13d is in close contact with the engaging plate part 33a of the connector cover 33. As shown in FIG.

As shown in FIG. 3, the wide stay 13 has an inverted U-shaped lead wire support plate 13e formed in the lead wire housing 13b and the connector cover 33 has an inverted C-shaped lead wire support plate ( 33b) is integrally formed. This lead wire support plate 33b is close to the lead wire support plate 13e as shown in Fig. 1 (a), and the plurality of lead wires 32a in the lead wire accommodating portion 13b are shown in Fig. 1 (c). As described above, it is sandwiched between the lead wire supporting plates 13e and 33b.

The plurality of lead wires 32a are connected to the output side of the inverter circuit (not shown). The input side of the inverter circuit is connected to a commercial AC power supply (not shown) via a rectifier circuit (not shown). The coil 29 of each phase is connected to the terminal 32 of the connector 32 from the lead wire 32a, and an insulating cover ( A direct current drive power is applied past the pin terminal 28 and the conductive plate 31 of 27.

In the stator core 26, as shown in FIG. 1A, a mold layer 34 is formed from above two insulating covers 27. The mold layer 34 assembles the terminal block 30 to the two insulating covers 27 to solder the terminal line of the coil 29 to the conductive plate 31, and then forms the stator core 26 into a mold (not shown). And formed by injecting molten PBT into the outer peripheral surface of the stator core 26, the connection portion between the coil 29 and the conductive plate 31, both end surfaces of the plurality of coils 29, and the terminal block 30. The back is covered with the mold layer 34.

Reference numeral 35 denotes a stator assembly composed of a stator core 26, two insulating covers 27, a plurality of pin terminals 28, a plurality of coils 29, a terminal block 30, and a mold layer 34. The stator assembly 35 corresponds to the stator body.

As for the outer peripheral surface of the motor frame 11, the some hook 11c (only one is shown) is integrally formed by equal pitch. Each of the hooks 11c corresponds to the engaged portion and has a leg shape extending in the axial direction. Moreover, in the left end surface of the mold layer 34, the some hook part 34a (only one is shown) is integrally formed in equal pitch in the outer peripheral part. Each hook portion 34a corresponds to a hooking portion, which is hooked on the hook 11c and each hook 11c is superimposed on the outer circumferential surface of the mold layer 34. The mold layer 34 is attached to the motor frame 11 side by the engaging force between the hook portion 34a and the hook 11c, and is in contact with the right end surface of the motor frame 11 by pressing.

In the left end surface of the mold layer 34, as shown in FIG. 1C, a circular annular rib 34b is formed integrally around the outer periphery of the stator core 26. As shown in FIG. This rib 34b corresponds to a fitting part, and the inclined surface 34c is formed in the outer peripheral part of the rib 34b. Further, a circular annular recess 11d is formed on the right end surface of the motor frame 11. This recessed part 11d corresponds to a fitting part, and the inclined surface 11e is formed in the inner surface of the recessed part 11d.

The rib 34b of the mold layer 34 is fitted in the recess 11d of the motor frame 11, and the inner and outer circumferential surfaces and the inclined surface 34c of the rib 34b are inner and outer circumferences of the recess 11d. In close contact with the surface and the inclined surface 11e, a gap is formed between the left end surface of the rib 34b and the bottom surface of the recessed portion 11d. Incidentally, the inclined surfaces 34c and 11e extend over the entire circumference of the rib 34b and the recessed portion 11d.

The inner circumferential surface of the three projections 26c of the stator core 26 is inserted with a collar 36 made of nylon and positioned in the axial center portion as shown in FIG. The left end face is attached to the shaft housing portion 17a of the bearing bracket 17. This collar 36 has a circular annular shape as shown in Fig. 7 (b), and three projections 36a are integrally formed in the collar 36 at equal pitches of 120 degrees. Each of the protrusions 36a protrudes to the right as shown in Fig. 7A and forms a large plate shape.

The front bearing assembly 37 of FIG. 1A includes the bearing bracket 17, the cover 18, the pressing spring 20, the metal pressing portion 21, the bearing metal 22, and the felt 23. , The shaft receiving portion 17a of the bearing bracket 17 of the front bearing assembly 37 is press-fitted into the inner circumferential surface of the three projections 26c of the stator core 26 from the right side. Each projection 36a of 36 is sandwiched between the shaft housing portions 17a of the two bearing brackets 17.

A circular cylindrical portion 34d is integrally formed on the right end surface of the mold layer 34. The metal housing portion 17b of the bearing bracket 17 of the rear bearing assembly portion 37 is inserted into the inner circumferential surface of the cylinder portion 34d, and the cylinder portion 34d and the metal housing portion 17b are axially oriented. Overlapped. In the mold layer 34, a circular annular receiving portion 34e is formed integrally with the left end of the cylindrical portion 34d, and the left end of the metal housing portion 17b is pressed against the receiving portion 34e. It is.

In the bearing metal 22 of the rear bearing assembly 25 and in the bearing metal 22 of the front bearing assembly 37, left and right ends of the rotating shaft 38 are rotatably inserted, The left end is attached to the thrust plate 19 of the rear bearing assembly 25, and the right end of the rotating shaft 38 penetrates the cover 18 of the front bearing assembly 37 and protrudes in the right direction.

The small diameter part 38a of circular cross section is formed in the axial center part of the rotating shaft 38. As shown in FIG. The diameter size of this small diameter portion 38a is set almost equal to the minimum value of the inner diameter size of the collar 36 as shown in Fig. 7A, and the small diameter portion 38a is inserted into the collar 36. It is.

A rotor yoke 39 made of steel sheet is fixed to the right end of the rotating shaft 38 as shown in Fig. 1A. The rotor yoke 39 has a cylindrical shape in which the right end surface is closed, and a plurality of rotor magnets 40 are fixed to the inner circumferential surface of the rotor yoke 39. Each of the rotor magnets 40 is made by magnetizing rubber and opposing the outer circumferential surface of the stator core 26 via an air gap.

A resin layer 41 made of PBT is formed on the surface of the rotor yoke 39, and the resin layer 41 covers the surface of the rotor yoke 39. In addition, the axial flow fan 42 is formed integrally with the resin layer 41. The fan 42 is composed of a plurality of vanes 42a, and when the coil 29 is powered, the plurality of vanes 42a rotates integrally with the rotor yoke 39 in the direction of arrow A. It is blown. Reference numeral 43 denotes a rotor assembly composed of the rotary shaft 38, the rotor yoke 39, the plurality of rotor magnets 40, the resin layer 41, and the fan 42.

Next, the assembling procedure of the motor will be described. To assemble the motor, the rear bearing assembly 25, the stator assembly 35, the front bearing assembly 37, and the rotor assembly 43 are assembled in advance. Then, the bearing bracket 17 of the rear bearing assembly 25 is pressed into the inner circumferential surface of the motor frame 11 and the rear bearing assembly 25 is assembled to the motor frame 11. Thereafter, the bearing bracket 17 of the rear bearing assembly 25 is press-fitted from the left side to the inner circumferential surface of the three projections 26c of the stator core 26 and the rear bearing assembly 25 is stator assembled 35. Assemble in

When the rear bearing assembly 25 is inserted into the stator assembly 35, the collar 36 is inserted from the right side to the inner circumferential surface of the three protrusions 26c of the stator core 26. Thereafter, the bearing bracket 17 of the front bearing body 37 is press-fitted into the inner circumferential surface of the three projections 26c of the stator core 26 from the right side, and the front bearing assembly 37 is stator assembled 35. Put it in.

When the front bearing assembly 37 is inserted into the stator assembly 35, the left end of the rotating shaft 38 is inserted into the bearing metal 22 of the rear bearing assembly 25 from within the bearing metal 22 of the front bearing assembly 37. Insert the rotor assembly 43 into the rear bearing assembly 25, the stator assembly 35, and the front bearing assembly 37. At this time, the left end of the rotating shaft 38 presses the collar 36 and the collar 36 elastically deforms. Then, the left end of the rotating shaft 38 passes through the collar 36, and the jigsaw portion 38a of the rotating shaft 38 is inserted into the collar 36 in a holding state.

According to this embodiment, the motor frame 11 is sandwiched between the stator assembly 35 and the bearing bracket 17 of the rear bearing assembly 25. Because of this, the motor frame 11 is attached to the stator assembly 35 with sufficient strength without screwing a pair of motor frames and inserting the stator assembly 35, thereby simplifying the attachment work of the motor frame 11 and The number is small.

Moreover, since the bell mouse 14 is provided in the motor frame 11, it is unnecessary to form the bell mouse 14 in the refrigerator wall of a refrigerator. For this reason, since the shape of a refrigerator wall is simplified, it is easy to design a refrigerator wall and a moldability becomes high.

In addition, since the bearing bracket 17 of the rear bearing assembly 25 is press-fitted into the bracket press-in hole 11a of the motor frame 11, shaking of the bearing bracket 17 with respect to the motor frame 11 is prevented. . In addition, since the positional relationship between the bell mouse 14 and the fan 42 is stabilized, interference of both is prevented.

In addition, the rib 11b was provided in the inner peripheral surface of the bracket insertion hole 11a. For this reason, press-fitting of the bearing bracket 17 is performed with a small force compared with the case where the bearing bracket 17 of the rear bearing assembly 25 is crimped | bonded to the whole inner peripheral surface of the bracket insertion hole 11a. As a result, the press fitting operation of the bearing bracket 17 becomes easy.

Further, the catching portion 17d of the bearing bracket 17 of the rear bearing assembly 25 was fitted to the inner circumferential surface of the motor frame 11. For this reason, the bearing bracket 17 is prevented from deviating from the motor frame 11 or the stator core 26 by the vibration at the time of operation | movement, or the like.

In addition, since a plurality of hooks 11c are provided on the outer circumference of the motor frame 11 and each hook 11c is engaged with the hook portion 34a of the mold layer 34, the stator assembly 35 The perpendicularity with respect to the motor frame 11 becomes high. In addition, since the hooks 11c are formed in the shape of legs overlapping the outer circumferential surface of the mold layer 34, the verticality of the stator assembly 35 with respect to the motor frame 11 is further increased, and the fan 42 and the bell Interference or the like of the mouse 14 is prevented.

Moreover, the hook 11c of the motor frame 11 was arrange | positioned in the part seen from the outside. Therefore, after assembling the motor, it is possible to confirm whether or not the hook 11c is engaged with the hook portion 34a. Therefore, the motor is prevented from being shipped while the hook 11c is not engaged with the hook portion 34a. do.

Further, circular ring ribs 34b and recesses 11d were formed in the mold layer 34 and the motor frame 11. For this reason, since the stator assembly 35 is positioned in the careful state to the motor frame 11 only by fitting the rib 34b in the recessed part 11d, the position with respect to the motor frame 11 of the stator assembly 35 is located. Decision work becomes easy. In addition, a labyrinth-shaped labyrinth seal is formed between the rib 34b and the recess 11d. For this reason, water penetrates inside from the interface between the mold layer 34 and the motor frame 11 by capillary action or the like, and the stator core 26 and the coil 29 and the like are prevented from being rusted with moisture.

In addition, a gap was provided between the left end surface of the rib 34b and the bottom surface of the recessed portion 11d. For this reason, since water which penetrates inside from the interface between the mold layer 34 and the motor frame 11 is easily broken, intrusion of water is surely prevented.

Incidentally, the inclined surfaces 34c and 11e were formed on the rib 34b and the return portion 11d. For this reason, since the latching of the corner part of the rib 34b and the corner part of the recessed part 11d is prevented, it becomes easy to fit the rib 34b in the recessed part 11d.

Moreover, since the cylinder part 34d was provided in the mold layer 34, and the bearing bracket 17 of the front bearing assembly 37 was press-fitted in the cylinder part 34d, the bearing bracket 17 of the front bearing assembly 37, Water or the like penetrates between the mold layers 34 and rust is prevented from occurring in the stator core 26 and the coil 29 and the like.

In addition, the connector part 30a of the stator assembly 35 was overlapped with the wide stay 13. For this reason, the connector part 30a becomes a blowing resistance, and the blowing ability of the fan 42 is prevented from falling under the influence of the connector part 30a.

Further, three narrow stays 12, one wide stay 1, etc. are arranged on the windy side (arrow A direction side) and an obstacle on the side that sucks in the wind (half arrow A direction side). Since the configuration is not arranged, the noise during rotation of the fan 42 is reduced.

In addition, the connector cover 33 is assembled to the wide stay 13, and the terminal (one end of the electric wave 31) and the connector (in the connector portion 30a) between the stay 13 and the connector cover 33. 32) The terminals inside were covered with water. For this reason, condensation water, water generated during defrosting operation, cleaning water, etc., generated in accordance with the temperature change in the refrigerator are applied to the terminals in the connector portion 30a and the terminals in the connector 32 so that the terminals are rusted or insulated. This is prevented from deteriorating.

Moreover, the upper end part of the connector cover 33 was overlapped with the connector accommodating part 13a of the wide stay 13. For this reason, the water which passes the stay 13 and falls vertically from the top passes through between the connector cover 33 and the stay 13 and into the connector cover 33, and the terminal and the connector 32 in the connector portion 30a. Since contact with the terminals inside is prevented, rust and insulation deterioration are prevented from this point as well.

Moreover, the connector part 30a and the connector 32 were arrange | positioned so that opening part may face downward. For this reason, even if water enters the connector part 30a and the connector 32, for example, it flows down through an opening part, and water accumulates in the connector part 30a and the connector 32, and insulation performance is prevented from deteriorating. .

In addition, since three attachment portions 14a were installed on the bell mouse 14 and the bell mouse 14 was supported at three points on the refrigerator wall, the three attachment portions 14a were not affected by the deflection of the refrigerator wall or the like. It can be attached easily. Moreover, each attachment part 14a was shifted in the circumferential direction with respect to three narrow stays 12 and one wide stay 13. As a result, a difference may occur between the vibration state of the stays 12 and 13 and the vibration state of the bell mouse 14 during operation, so that the vibration sound of the stays 12 and 13 and the vibration sound of the bell mouse 14 overlap. Amplification is prevented.

Moreover, each net board 26a located in the axial direction both sides of the stator core 26 was laminated | stacked so that the bar 26b might face the other side. For this reason, in inserting the bearing bracket 17 of the rear bearing assembly 25 and the bearing bracket 17 of the front bearing assembly 37 into the inner peripheral surface of the stator core 26, each bearing bracket Since the kit 17 is prevented from being caught by the claws 26b, the press-fitting workability of each bearing bracket 17 is improved.

Moreover, the protrusion part 26c was disperse | distributed and formed in the inner peripheral surface of the stator core 26. As shown in FIG. For this reason, in press-fitting the bearing bracket 17 of the rear bearing assembly 25 and the bearing bracket 17 of the front bearing assembly 37 to the inner peripheral surface of the stator core 26, the projection part 26c ) Tightens the outer circumferential surface of each bearing bracket 17, so that each bearing bracket 17 becomes difficult to come out of the stator core 26. In addition, since each bearing bracket is partially press-fitted into the inner circumferential surface of the stator core 26, the bending at the press-in of each bearing bracket 17 is prevented.

Further, three projections 26c were formed at equal pitches on the inner circumferential surface of the stator core 26. For this reason, the pressing position of the bearing bracket 17 of the rear bearing assembly 25 by the three projection parts 26c, and the bearing bracket 17 of the front bearing assembly 37 by the three projection parts 26c are removed. Since the symmetry is generated at the pressing position and each bearing bracket 17 is well elastically deformed at the time of press fitting, the press-fitting workability of the stator core 26 of each bearing bracket 17 is improved. In addition, since the engagement amount of each bearing bracket 17 and the projection part 26c increases, it becomes difficult for each bearing bracket 17 to escape further from the stator core 26. As shown in FIG.

In addition, each bearing bracket 17 was formed of metal. For this reason, the amount of expansion / contraction of each bearing bracket 17 and the amount of expansion / contraction of the stator core 26 are the same, and each bearing bracket 17 and the stator core 26 are clipped (plastic deformation). This makes it difficult to escape the stator core 26 from each bearing bracket 17 also from this point of view.

In addition, although the bell mouse 14 was integrally formed in the motor frame 11 in the said embodiment, it is not limited to this, For example, you may assemble the bell mouse 14 in the motor frame 11 separately. In addition, when a bell mouse is provided in the refrigerator wall of the refrigerator and the motor frame 11 is fixed to the refrigerator wall, the bell mouse may be arranged at the outer circumference of the fan 42.

Further, in the above embodiment, a circular annular rib 11b is provided on the inner circumferential surface of the bracket press-in hole 11a of the motor frame 11 and the outer circumferential surface of the bearing bracket 17 is rib 11b. Although it presses on, it is not limited to this, For example, the rib 11b may be abolished and the bearing bracket 17 may be pressed and attached to the whole inner peripheral surface of the bracket insertion hole 11a. Alternatively, ribs extending in the axial direction on the inner circumferential surface of the bracket insertion hole 11a may be formed at equal pitches of 120 degrees, and each rib may be pressed onto the outer circumferential surface of the bearing bracket 17.

In addition, in the above embodiment, the inner peripheral surface of the motor frame 11 is tightened by tightening the holding portion 17d of the bearing bracket 17, for example, but not limited to a circular ring on the inner peripheral surface of the motor frame 11. A recessed portion may be provided in the shape, and the gripping portion 17d may be engaged in the recessed portion.

In addition, in the above embodiment, the hook 11c of the motor frame 11 is fitted to the hook portion 34a of the mold layer 34, but is not limited thereto. For example, the outer circumference of the mold layer 34 is not limited thereto. A plurality of hooks forming a leg shape extending in the axial direction, and a plurality of hooks are provided at the outer circumference of the motor frame 11, and each hook of the mold layer 34 is attached to the hook of the motor frame 11. It may overlap with the outer peripheral surface of the motor frame 11 simultaneously with engagement.

Further, in the above embodiment, a circular annular rib 34d is provided in the mold layer 34, a circular annular recess 11d is provided in the motor frame 11, and the rib 34d is recessed 11d. Although it fits inside, it is not limited to this, For example, a circular annular recess is provided in the mold layer 34, a circular annular rib is provided in the motor frame 11, and the rib of the motor frame 11 is removed. You may engage in the recessed part of the mold layer 34.

In the above embodiment, the stator core 26 is covered with the insulating cover 27 from both sides in the axial direction, and the coil 29 is wound from the two insulating covers 27, but the present invention is not limited thereto. As the core 26 is accommodated in the mold and the molten resin is injected, an insulating layer may be formed on the surface of the stator core 26, and the coil 29 may be wound from above the insulating layer.

Further, in the above embodiment, although the circular annular ribs 34b are provided in the mold layer 34, the present invention is not limited thereto. For example, three projections may be provided at equal pitches of 120 degrees, and the three projections may be provided in the motor frame ( You may engage in 11 d of recessed parts of 11). Also in this configuration, the stator assembly 35 is positioned in the motor frame 11 in a careful state by simply fitting the three protrusions of the mold layer 34 into the recesses 11d of the motor frame 11.

Further, in the above embodiment, although the bearing metal 22 is mounted in the bearing bracket 17 of the rear bearing assembly 25 and the bearing bracket 17 of the front bearing assembly 37, the present invention is not limited thereto. For example, a ball bearing may be stored in each bearing bracket 17 and each end of the rotating shaft 38 may be inserted into the inner ring of the ball bearing.

In addition, although the connector part 30a of the terminal block 30 was accommodated in the connector accommodating part 13a of the wide stay 13 in the said embodiment, it is not limited to this, For example, the wide stay 13 is provided. ), A flat stay may be provided, and the connector portion 30a may be disposed so as to overlap the flat stay while the connector portion 30a is viewed in the axial direction.

Further, in the above embodiment, the terminal block 30 is assembled to the end surface of the insulating cover 27 located on the motor frame 11 side, but the present invention is not limited thereto. For example, the insulation is located on the side opposite to the motor frame 11. The terminal block 30 may be assembled to the end face of the cover 27.

In the above embodiment, the present invention is applied to a DC blushless outer rotor type fan motor, but the present invention is not limited thereto, and may be applied to, for example, an axial gap type fan motor. In this case, the plurality of rotor magnets may be opposed to the right end surface of the stator assembly 35 through the air gap.

In addition, in the above embodiment, the present invention is applied to a fan motor that blows air into the refrigerator after blowing air into an everpolator of the refrigerator, but is not limited thereto. For example, a fan for injecting cooling air into a compressor of a refrigerator, for example. The present invention may be applied to a fan motor for injecting cooling wind to a motor, a magnetron of a microwave oven, a high-pressure transformer, or a fan motor for rotationally driving a fan of a ventilation fan.

As is clear from the above description, the fan motor of the present invention has the following effects.

According to the means of claim 1, the motor frame was sandwiched between the stator body and the bearing bracket. For this reason, since the motor frame is attached to the stator main body with sufficient strength, the attachment operation of the motor frame is simplified and the number of parts is small.

According to the means of Claim 2, since the bell mouse is provided in the motor frame, it is unnecessary to form the bell mouse on the mounting surface of the motor frame. For this reason, since the shape of an installation surface is simplified, it is easy to design an installation surface, and the moldability of an installation surface becomes high.

According to the means of claim 3, since the connector portion is superimposed on the stay, the blowing ability of the fan is prevented from being lowered under the influence of the connector portion.

According to the means of claim 4, since the bearing bracket is press-fitted into the press-in portion of the motor frame, the shaking of the bearing bracket with respect to the motor frame is prevented. In addition, since the positional relationship between the fan and the bell mouse is stabilized, for example, interference between the two is prevented. In addition, since the projection is provided on the inner circumferential surface of the insertion portion, the press fitting operation of the bearing bracket can be performed with a small force, and the press fitting operation of the bearing bracket becomes easy.

According to the means of Claim 5, the engagement part of the bearing bracket was engaged with the motor frame. This prevents the bearing bracket from deviating from the motor frame or the stator core due to vibration during operation or the like.

According to the means of claim 6, since a plurality of engaging portions located on the outer circumferential portion of the stator main body are respectively engaged with the engaging portions of the motor frame, the verticality with respect to the motor frame of the stator main body is increased. In addition, since the engaging portion or the engaged portion is installed in a leg shape overlapping the outer circumferential surface of the motor frame or the outer circumferential surface of the stator body, the verticality of the stator body relative to the motor frame is further increased, for example, a fan and a bell mouse Interference is prevented.

According to the means of Claim 7, the annular fitting part and the fitting part were provided in the stator main body and the motor frame. For this reason, since the stator main body is carefully positioned on the motor frame by fitting both, the positioning operation with respect to the motor frame of the stator main body becomes easy. In addition, since the sealing is performed between the engaging portion and the engaged portion, water is prevented from infiltrating into the interior from the interface between the stator main body and the motor frame, and rusting of the stator core, the coil, and the like with moisture is prevented.

According to the means according to claim 8, since the cylinder part is installed in the stator body and a separate bearing bracket is press-fitted in the cylinder part, water penetrates inside between the other bearing bracket and the stator body, and the stator core, coil, etc. dissolve with water. Occurrence is prevented.

According to the means of claim 9, since the terminal in the connector portion is covered with the connector cover, the terminal in the connector portion is prevented from rusting and deteriorating the insulation performance.

According to the means of Claim 10, since the opening part was arrange | positioned so that a connector part may face downward, even if it intrudes in a connector part, it will flow through an opening part, for example. This prevents water from accumulating in the connector portion and rusting of the terminals and deterioration of the insulation performance.

According to the means of Claim 11, the connection part of an electrically conductive plate and a coil was covered with the mold layer made of resin. This prevents moisture from adhering to both of the connecting portions and rusting of the connecting portions and deterioration of the insulating performance.

According to the means of Claim 12, since three attachment parts are provided in the bell mouse, three attachment parts can be easily attached to an installation surface, without being influenced by the bending of an installation surface, etc. Moreover, each attachment part was shifted in the circumferential direction with respect to a stay. For this reason, since a difference occurs between the vibration state of the stay and the vibration state of the bell mouse, the amplification of the vibration sound of the stay and the vibration sound of the bell mouse is prevented from overlapping.

According to the means described in claim 13, the magnetic plates located on both sides in the axial direction of the stator core were laminated so that the bars faced the opposite side. For this reason, in order to press-fit a bearing bracket to the inner peripheral surface of a stator core, the bearing bracket is prevented from being caught by a variance, and the press fitting workability of a bearing bracket improves.

According to the means of claim 14, the protrusions were distributed and provided on the inner circumferential surface of the stator core. For this reason, since the protrusion tightens the outer circumferential surface of the bearing bracket in press-fitting the bearing bracket to the inner circumferential surface of the stator core, the bearing bracket becomes difficult to escape from the stator core. In addition, since the bearing bracket is partially press-fitted into the inner circumferential surface of the stator core, bending during the press-fit of the bearing bracket is prevented.

According to the means of claim 15, since the plurality of projections are provided at substantially equal pitch on the inner circumferential surface of the stator core, the plurality of the projections tighten the outer circumferential surface of the bearing bracket and the bearing bracket becomes difficult to be pulled out of the stator core. In addition, since the symmetry is generated at the position at which the bearing bracket is pressed by the plurality of protrusions and the bearing bracket is elastically deformed at the time of press fitting, the press fitting workability of the bearing bracket to the stator core is improved. In addition, the engagement amount of the bearing bracket and the protrusion increases, so that the bearing bracket becomes harder to fall out of the stator core.

Claims (15)

A stator body having a stator core wound with a coil, A bearing bracket press-fitted into the inner circumferential surface of the stator core from an axial one-side side, A bearing mounted to the bearing bracket, A rotating shaft rotatably supported by the bearing and rotating the fan; And a motor frame fitted between the stator body and the bearing bracket. The method of claim 1, The motor motor is characterized in that the bell mouse surrounding the fan through a plurality of stays is installed. The method of claim 2, A fan motor, wherein the stator main body is provided with a connector portion for feeding the coil to a predetermined stay. The method according to claim 1 or 2, The motor frame is provided with a hole-shaped press-in part having protrusions on the inner circumferential surface thereof. And a bearing bracket is inserted into the press-fitting portion. The method of claim 1, The bearing motor is provided with a latching portion to be fitted to the motor frame. The method according to claim 1 or 2, The outer periphery of the stator body has a plurality of engaging parts are installed The motor frame is provided with a plurality of engaged parts for engaging the plurality of engaging parts, respectively, Each of the engaging portion or each of the engaged portion is a fan motor, characterized in that forming a leg overlap the outer peripheral surface of the motor frame or the outer peripheral surface of the stator body. The method according to claim 1 or 2, The stator main body is located on the end face of the motor frame and the fitting part is installed. The motor frame is provided with a fitting portion, which is placed on the end face of the stator main body and fitted with the fitting portion, And the fitting portion and the fitted fitting portion form a ring shape. The method of claim 1, A separate bearing bracket is inserted into the inner circumferential surface of the stator core from the other side in the axial direction. A fan motor, wherein the stator main body is provided with a cylinder portion located at an end face of a separate bearing bracket and into which a separate bearing bracket is press-fitted. The method of claim 1, The stator body is provided with a connector portion for feeding the coils, And a terminal of the connector portion is covered by a connector cover. The method of claim 1, The fan motor, characterized in that the connector portion for feeding the coil to the stator main body is provided with the opening facing downward. The method of claim 1, One end side or the other end side of the stator main body is provided with a terminal block having a conductive plate electrically connected to the coil. The connecting portion of the conductive plate and the coil is covered with a mold layer made of resin. The method of claim 1, The motor frame is equipped with a bell mouse that surrounds the fan through the four stays. Bellemouth is a fan motor, characterized in that the three mounting portions are located in the circumferential direction with respect to each stay. The method according to claim 1 or 8, The stator core consists of laminating magnetic plates in the axial direction A fan motor, wherein the bars of the magnetic plates located on both sides in the axial direction are directed to the opposite side. The rotary electric machine according to claim 1 or 8, wherein the protrusions are distributed on the inner circumferential surface of the stator core. The method according to claim 1 or 8, A fan motor, wherein a plurality of projections are provided at substantially equal pitches on the inner circumferential surface of the stator core.