Housing, motor and blower

Abstract

A housing (11) that accommodates a stator (30) of a motor (10) includes an opening (15) for accommodating the stator (30), an outer edge portion (17) that is formed in the circumferential direction so as to surround an outer periphery (30A) of the stator (30) on the radially outer side of the opening (15) and extends in the radial direction, and an accommodating groove (40) that accommodates a solder portion (16) that is soldered to the conductors including the windings (35a) of the stator (30) and is drawn out to the outer edge portion (17). The accommodating groove (40) is disposed in the outer edge portion (17) and extends in any direction from a normal direction of the outer periphery (30A) at a circumferential position where the accommodating groove (40) is disposed to a tangential direction of the outer periphery (30A) at the circumferential position.

Description

[Technical field]

[0001] The present case relates to a housing that accommodates a stator of a motor, a motor having a stator accommodated in the housing, and a blower to which the motor is applied. [Background technology]

[0002] A structure has been proposed for arranging the ends of conductors, such as windings forming coils and lead wires for supplying power to the windings, in a housing that accommodates a motor stator so as not to interfere with other members. For example, Patent Document 1 discloses a structure in a brushless motor in which a stator winding is provided on a stator core via an insulating layer, one end of the stator windings constituting each phase is directly connected to the same potential to form a neutral connection, and a fastener, hole, or the like for arranging the neutral connection is provided in a part of the insulating layer. In the technology of Patent Document 1, the neutral connection is inserted into the fastener or hole and fixed with an adhesive or protrusion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-308738 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technique of fixing and arranging the neutral connection with adhesive or the like as in the above Patent Document 1, the neutral connection is likely to be deformed because an external force is easily applied to the neutral connection during the fixing operation. In particular, when the neutral connection is soldered, if the soldered portion is deformed by the external force during the fixing operation, the connection quality will be reduced. Note that the same problem as above may occur not only in the neutral connection in which one ends of the windings are connected to each other, but also in the structure in which the portion where the windings and the lead wires are connected and the portion where the lead wires are connected to each other are soldered (hereinafter referred to as the "soldered portion"). Therefore, there is room for improvement in the arrangement structure that can suppress deformation of the soldered portion where the conductors including the windings are soldered to each other in the housing that accommodates the stator.

[0005] The housing, motor, and blower of the present invention have been devised in consideration of these problems, and one of the objects of the invention is to suppress deformation of the soldered portion and ensure connection quality. However, the present invention is not limited to this object. Another object of the present invention is to achieve effects that cannot be obtained by conventional techniques, which are derived from the configurations shown in the below-mentioned description of the preferred embodiment of the invention. [Means for solving the problem]

[0006] The disclosed housing, motor, and blower can be realized as the embodiments (application examples) disclosed below, which solve at least part of the above problems. Each of the embodiments 2 to 4 is an embodiment that can be selected additionally as appropriate, and each of the embodiments can be omitted. None of the embodiments 2 to 4 discloses an embodiment or configuration that is essential to the present invention.

[0007] Aspect 1. The disclosed housing is a housing that accommodates a stator of a motor, and includes an opening for accommodating the stator, an outer edge portion formed circumferentially so as to surround the outer periphery of the stator radially outside of the opening and extending in the radial direction, and an accommodating groove in which conductors including the windings of the stator are soldered to each other and a solder portion drawn out to the outer edge portion is accommodated, the accommodating groove being disposed on the outer edge portion and extending in any direction from a normal direction to the outer periphery at a circumferential position where the accommodating groove is disposed to a tangential direction to the outer periphery at that circumferential position.

[0008] Aspect 2. In the above aspect 1, it is preferable that the radial length of the outer edge portion is set shorter than the longitudinal length of the solder portion, and that the accommodating groove extends in a direction intersecting the normal direction. Aspect 3. In the above aspect 1 or 2, it is preferable that the receiving groove extends in a direction intersecting both the normal direction and the tangential direction. Aspect 4. In any one of Aspects 1 to 3 above, it is preferable that the accommodation groove accommodates the solder portion in a state in which the solder portion is simply placed therein without being fixed.

[0009] A motor disclosed in accordance with aspect 5 includes the housing according to any one of aspects 1 to 4 above, a stator accommodated in the housing, and a rotor disposed radially opposite the stator. Aspect 6. The disclosed blower comprises the motor according to aspect 5 above, and an impeller fixed to a rotating shaft of the motor. Effect of the Invention

[0010] According to the disclosed housing, motor, and blower, the solder portion formed by soldering together the conductors including the windings is accommodated in an accommodating groove arranged on the outer edge, thereby suppressing deformation of the solder portion drawn out to the outer edge. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a plan view for explaining a blower according to the embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Diagram 3] FIG. 2 is an enlarged view of a main part of the housing of FIG. [Figure 4] 11 is a schematic diagram for explaining an extension direction of an accommodation groove. FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along the line BB in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The housing, motor, and blower will be described as embodiments with reference to the drawings. The embodiments described below are merely examples, and are not intended to exclude various modifications or application of techniques not clearly stated in the following embodiments. Each configuration of the present embodiment can be modified in various ways without departing from the spirit of the invention. In addition, they can be selected as necessary, or can be combined as appropriate.

[0013] In the embodiment, a housing for accommodating a stator of a motor used in a blower will be described as an example of the housing. In the following description, the direction in which the motor's rotating shaft extends (rotating shaft direction) is defined as the axial direction, and the direction perpendicular to the axial direction and away from and toward the rotating shaft is defined as the radial direction. In addition, in the radial direction, the rotating shaft side is defined as the radially inner side, and the opposite side (the side away from the rotating shaft) is defined as the radially outer side. The direction perpendicular to the axial direction and going around the rotating shaft is defined as the circumferential direction.

[0014] [1. Configuration] Fig. 1 is a plan view for explaining the configuration of a blower 1 according to this embodiment, with end bells 12 (see Fig. 2) omitted so that the internal structure can be seen. Fig. 2 is a cross-sectional view taken along the line AA in Fig. 1. The blower 1 of this embodiment is a blower that blows gas (e.g., air) by rotating an impeller 2 (see Fig. 2).

[0015] 1 and 2, the blower 1 includes an impeller 2, a motor 10 as a drive source for the impeller 2, and a blower housing 11 (hereinafter simply referred to as the "housing 11") forming a case body for accommodating the impeller 2 and the motor 10. The motor 10 of this embodiment is an inner rotor type brushless motor, and includes a shaft 21 (rotation axis) having a rotation center X, a rotor 20 that rotates integrally with the shaft 21, and a stator 30 located radially outside (hereinafter simply referred to as the "outside") of the rotor 20. The stator 30 is accommodated in the housing 11, and the rotor 20 is disposed opposite the stator 30 in the radial direction (in the present embodiment, radially inside).

[0016] 2, rotor 20 has a magnet 22 fixed to shaft 21, and two balancers 23 that axially sandwich magnet 22, and is rotatably fixed to housing 11 and end bells 12 by bearings 24. Stator 30 has a stator core 31 fixed to the inner circumferential surface of housing 11, and a coil 35 wound around stator core 31 with insulators 32 interposed therebetween.

[0017] In this embodiment, as shown in Fig. 1, a stator 30 having six coils 35 arranged at equal intervals in the circumferential direction is taken as an example. The six coils 35 of the stator 30 are formed by windings 35a wound in, for example, a Y-connection method. In more detail, the six coils 35 constitute one of a U phase, a V phase, or a W phase, and two coils 35 constituting the same phase are connected to each other by a crossover wire (not shown).

[0018] Lead wire 14 for supplying power to winding 35a is connected by soldering to an end (e.g., the start of winding) of winding 35a forming coil 35. In addition, the end (hereinafter referred to as the "end of winding") of winding 35a of each phase on the side to which lead wire 14 is not connected forms a neutral point that is joined together, and the ends (ends) of these windings 35a are connected to each other by soldering.

[0019] In this specification, the portion where the conductors including the winding 35a of the stator 30 are soldered together is referred to as a "soldered portion." Note that the winding 35a and the lead wires 14 are both elements included in the "conductor" defined in the claims.

[0020] In the following description, as an example of a "solder portion," a solder portion 16 formed by soldering the ends of the windings of the coils 35 of each phase together will be described. Since the solder portion 16 is a portion in which the ends of a plurality of windings 35a are bundled and soldered together, the solder portion 16 is formed into a shape extending along the direction in which the windings 35a extend (longitudinal direction), such as a substantially cylindrical or ellipsoidal shape. Note that the solder portion 16 is not necessarily formed into a perfect shape such as a substantially cylindrical or ellipsoidal shape, but is formed into a shape whose longitudinal direction is at least the direction in which the windings 35a extend.

[0021] Further, grooves 14A are formed on the upper surface side of the housing 11 so that each of the multiple (here, five) lead wires 14 can be pulled out from inside the housing 11 and the end bell 12 to the outside. The number of grooves 14A is the same as the number of lead wires 14, and by arranging each lead wire 14 in each groove 14A, the lead wires 14 can be appropriately routed from inside the housing 11 to the outside. In this embodiment, three of the five lead wires 14 are connected to the winding 35a, and the remaining two are connected to an electronic device other than the winding 35a, such as a temperature sensor. Note that the number of lead wires 14 and the object to be connected are not limited to this.

[0022] As shown in Fig. 2, impeller 2 is fixed to one end of shaft 21. Impeller 2 is an impeller for blowing air, and is configured, for example, to include a disk-shaped base portion fixed to shaft 21 and a plurality of fins radially erected on the disk surface of the base portion. When motor 10 is operated to rotate shaft 21, impeller 2 rotates integrally with shaft 21.

[0023] The housing 11 has a bottomed cylindrical portion 11A and an annular portion 11B as portions for accommodating the impeller 2 and the motor 10. The cylindrical portion 11A is a portion that forms an arrangement space for the motor 10 (i.e., the rotor 20 and the stator 30) therein, and the annular portion 11B is a portion that forms an arrangement space for the impeller 2 between the cylindrical portion 11A and a cover member (not shown) located outside the cylindrical portion 11A. The annular portion 11B is formed continuously from the outer peripheral surface of the side wall portion 11c of the cylindrical portion 11A to the outside. The upper end portion of the annular portion 11B functions as a flange portion 11f that extends outward from the side wall portion 11c.

[0024] In the housing 11 of this embodiment, a through hole through which the shaft 21 is inserted and a step portion 11e to which the bearing 24 and the O-ring 25 are fixed are provided at the bottom 11d of the cylindrical portion 11A. The lower end of the shaft 21 protrudes from the through hole to the lower surface side of the housing 11, and the impeller 2 is fixed to this lower end. A cover member is attached to the lower surface side of the housing 11.

[0025] In this embodiment, the end bell 12 and a cover member are combined with the housing 11 to form the case body of the blower 1. In other words, the housing 11 is one of the components that make up the case body. This case body has a substantially circular appearance when viewed from the axial direction, and the impeller 2 and the motor 10 are arranged (housed) inside. The dimensions of the case body of the blower 1 are set so that at least the impeller 2 and the motor 10 can be housed inside. The end bell 12 is a cover member that is combined with the housing 11. In this embodiment, the outer peripheral end portion 12a of the end bell 12 is placed on the flange portion 11f of the housing 11, and the end bell 12 is fixed to the housing 11.

[0026] The inside of the cylindrical portion 11A, i.e., the space surrounded by the side wall portion 11c and the bottom portion 11d, is the arrangement space for the rotor 20 and the stator 30. For convenience, in the axial direction, the side on which the end bells 12 are arranged with respect to the housing 11 will be referred to as the "first direction D1" and the opposite side as the "second direction D2." In addition, if the axial direction is assumed to be the up-down direction, the first direction D1 side will be referred to as the "upper" and the second direction D2 side will be referred to as the "lower."

[0027] 1 and 2, the housing 11 has an opening 15 for accommodating the stator 30. The opening 15 accommodates the stator 30 from the axial direction. The opening 15 is a region surrounded by the upper edge of the side wall portion 11c at the upper end of the cylindrical portion 11A, and forms an opening for disposing the rotor 20 and the stator 30 inside the cylindrical portion 11A.

[0028] Opening 15 has a substantially circular outline when viewed from first direction D1. Note that the term "substantially circular" is not limited to a perfect circle (circle) and includes shapes that can be considered to be circular. For example, opening 15 may be a polygonal shape that can be considered to be circular when viewed from first direction D1. Opening 15 of tubular portion 11A is covered by end bell 12, as shown typically by a two-dot chain line in FIG. 2.

[0029] Fig. 3 is an enlarged view of a main part of the housing 11. As shown in Fig. 1 and Fig. 3, the housing 11 is provided with an outer edge portion 17 that is formed in the circumferential direction so as to surround the outer periphery 30A of the stator 30 on the radial outside of the opening 15 and that extends in the radial direction, and an accommodation groove 40 that accommodates the solder portion 16 drawn out to the outer edge portion 17.

[0030] The outer edge portion 17 is a ring-shaped portion formed in a plane from the upper end edge of the side wall portion 11c toward the outside in the radial direction when viewed from the first direction D1. This plane-shaped outer edge portion 17 forms an area in which the solder portion 16 drawn out from the stator 30 side toward the outside in the radial direction is arranged. The accommodation groove 40 is arranged in the outer edge portion 17, and is a groove-shaped portion for arranging the solder portion 16 drawn out to the outer edge portion 17 so as to suppress deformation. In detail, the accommodation groove 40 is configured to arrange the solder portion 16 so as not to interfere with other members such as the stator 30 and the winding 35a, that is, to electrically insulate the solder portion 16 from other members without causing physical contact therebetween.

[0031] Incidentally, "accommodating the solder portion 16" means that at least a portion of the solder portion 16 is contained within the accommodating groove 40. However, if it is desired to avoid contact between the solder portion 16 and the conductor by, for example, arranging a conductor around the solder portion 16, it is also possible to ensure that no portion of the solder portion 16 is exposed outside the accommodating groove 40. Note that since the winding 35a is covered with an insulating material except for the portion that will become the solder portion 16, electrical insulation can be ensured as long as at least the solder portion 16 is accommodated in the accommodating groove 40 (in other words, even if the unsoldered and covered winding 35a is exposed outside the accommodating groove 40).

[0032] In the housing 11 of this embodiment, one accommodating groove 40 is provided corresponding to one solder portion 16. As shown in Figures 1 and 3, the position of the accommodating groove 40 in the outer edge portion 17 may be appropriately set according to the position where the solder portion 16 is drawn out from the stator 30 side, and is preferably set so that the distance from the position where the solder portion 16 is drawn out from the stator 30 side to the accommodating groove 40 is the shortest. The position of this accommodating groove 40 may be determined according to the specifications of the coil 35 (i.e., the arrangement of the windings 35a of each phase).

[0033] 1 and 3, the storage groove 40 extends in any direction Dg from a normal direction Dn (see FIG. 4) of the outer periphery 30A at a position (circumferential position) 30B where the storage groove 40 is arranged to a tangential direction Dt (see FIG. 4) of the outer periphery 30A at the position 30B. More specifically, the storage groove 40 is a portion that extends linearly from the position 30B where the storage groove 40 is arranged on the outer periphery 30A in the direction Dg. Hereinafter, the extension direction of the storage groove 40 is also referred to as the "extension direction Dg."

[0034] FIG. 4 is a schematic diagram for explaining the extension direction Dg of the housing groove 40. The circle in FIG. 4 indicates the outer periphery 30A of the stator 30. The position 30B on the outer periphery 30A is the position where the housing groove 40 is arranged (the radially inner end position of the housing groove 40). In addition, in FIG. 4, the housing groove 40 in the housing 11 in FIG. 1 is typically shown by a broken line. The normal direction Dn of the outer periphery 30A is the extension direction of a virtual normal line passing through the position 30B on the outer periphery 30A, and coincides with the radial direction of the circle (stator 30). In addition, the tangential direction Dt of the outer periphery 30A is the extension direction of a virtual tangent line passing through the position 30B on the outer periphery 30A. The normal direction Dn can also be said to be a direction that perpendicularly intersects with the tangential direction Dt in a plane in which the outer periphery 30A extends.

[0035] The extension direction Dg of the accommodating groove 40, i.e., any direction Dg from the normal direction Dn to the tangential direction Dt, is any direction within the region that falls within an angular range Ra of approximately 90° from the normal direction Dn at position 30B to the tangential direction Dt extending in one direction from position 30B and an angular range Rb of approximately 90° from position 30B to the tangential direction Dt extending in the other direction (i.e., within 180° from one tangential direction Dt to the other tangential direction Dt).

[0036] 3, the length Lg of the accommodating groove 40 in the extension direction Dg is determined by the radial length Ld of the outer edge portion 17 (the dimension of the outer edge portion 17 extending in the radial direction) and the extension direction Dg of the accommodating groove 40. From the viewpoint of ensuring the accommodation ability to accommodate the solder portion 16 without deforming it, the length Lg of the accommodating groove 40 is preferably set to be at least longer than the solder portion 16. On the other hand, from the viewpoint of making the housing 11 compact, it is desirable to set the radial length Ld of the outer edge portion 17 (see FIGS. 3 and 4) as short as possible.

[0037] Therefore, in order to set the radial length Ld of the outer edge portion 17 as short as possible and set the length Lg of the storage groove 40 long, the radial length Ld of the outer edge portion 17 is set shorter than the longitudinal length Ls of the solder portion 16, and the storage groove 40 is extended in a direction intersecting with the normal direction Dn. In this way, by providing the storage groove 40 inclined toward the tangential direction Dt side with respect to the normal direction Dn (i.e., by the extension direction Dg not coinciding with the normal direction Dn), the length Lg of the storage groove 40 in the extension direction Dg can be set longer than the radial length Ld of the outer edge portion 17. In other words, even if the radial length Ld of the outer edge portion 17 is set shorter than the length Ls of the solder portion 16, the length Lg of the storage groove 40 can be set shorter than the length Ls of the solder portion 16.

[0038] Moreover, the accommodation groove 40 of this embodiment extends in a direction intersecting both the normal direction Dn and the tangential direction Dt from the viewpoint of ensuring accommodation capability that allows the solder portion 16 to be accommodated without being deformed. That is, as shown in Fig. 4, the extension direction Dg of the accommodation groove 40 is set so as not to coincide with either the normal direction Dn or the tangential direction Dt.

[0039] The solder portion 16 is drawn out to the outer edge portion 17 in a position in which it extends in a direction intersecting both the normal direction Dn and the tangential direction Dt. Therefore, when attempting to draw out this solder portion 16 in a direction that coincides with the normal direction Dn or the tangential direction Dt, there is a tendency for a large external force to be applied to the solder portion 16. In contrast, a configuration in which the accommodating groove 40 extends in a direction that intersects both the normal direction Dn and the tangential direction Dt can be said to be a configuration in which an external force that deforms the solder portion 16 is unlikely to be applied when the solder portion 16 is accommodated in the accommodating groove 40.

[0040] Next, a description will be given of the structure for accommodating the solder parts 16 in the accommodating grooves 40. FIG 5 is a cross-sectional view taken along the line BB in FIG. As shown in Figures 1, 3 and 5, the accommodating groove 40 has a space 44 capable of accommodating the solder portion 16, which is defined by wall surfaces 41, 42, and 43 arranged on three sides, namely both circumferential sides and the radially outer side, with respect to the solder portion 16 that is pulled out to the outer edge portion 17 and accommodated in the accommodating groove 40.

[0041] The wall surfaces 41, 42 are wall portions disposed on both circumferential sides of the bottom surface 45 of the accommodation groove 40. The wall surface 43 is a wall portion disposed radially outward from the bottom surface 45. Furthermore, no wall portions are provided on the upper surface side and the radially inner side of the accommodation groove 40, and the accommodation groove 40 is open. In the following, when distinguishing between the wall surfaces 41, 42 and the wall surface 43, the wall surfaces 41, 42 will be referred to as "side walls 41, 42" and the wall surface 43 will be referred to as "outer wall 43."

[0042] In the configuration example shown in FIG. 3 and FIG. 5, the side walls 41, 42 are erected in the first direction D1 from the upper surface of the outer edge portion 17, and are arranged approximately parallel to each other at a distance in the circumferential direction. The outer wall 43 is erected in the first direction D1 from the upper surface of the outer edge portion 17. The outer wall 43 in this embodiment is formed of a part of the outer peripheral wall 18 protruding from the outer periphery (the outer peripheral edge in the radial direction) of the outer edge portion 17, but the outer wall 43 is not limited to a configuration in which a part of another part or member is used, and may be formed of an independent part or member. In FIG. 5, the upper surface of the outer edge portion 17 and the bottom surface 45 of the accommodation groove 40 are at approximately the same axial position, but the former may be located closer to the first direction D1 side than the latter, or may be located closer to the second direction D2 side. The widths of the two side walls 41, 42 do not necessarily have to be the same.

[0043] The three dimensions of the accommodating groove 40, namely, the height Tg (depth), width Wg, and length Lg in the extension direction Dg, are set longer than the height Ts, width Ws, and longitudinal length Ls of the solder portion 16, respectively, so as to form a space 44 capable of accommodating the solder portion 16. The height Tg of the accommodation groove 40 is the dimension in the axial direction, and is the dimension from the bottom surface 45 to the upper surfaces of the walls 41, 42, and 43. In the accommodation groove 40 shown in Fig. 5, the side walls 41, 42 and the outer wall 43 are formed to have the same height.

[0044] The width Wg of the accommodation groove 40 is the dimension by which the side walls 41, 42 are circumferentially spaced apart from each other. That is, the width Wg is the distance between the opposing surfaces of the side walls 41, 42, and can also be said to be the dimension (width) of the space 44 in the circumferential direction. The length Lg (see FIG. 3) of the housing groove 40 in the extension direction Dg can be said to be the distance from the position 30B on the outer periphery 30A of the housing groove 40 to the outer wall 43 (the length of a straight line connecting the position 30B and the outer wall 43). This length Lg is determined by the extension direction Dg of the housing groove 40 and the radial length Ld of the outer edge portion 17.

[0045] The height Ts and width Ws of the solder portion 16 are, for example, the lengths of the portions corresponding to the outer diameter when the solder portion 16 is considered to be substantially cylindrical. In reality, the shape of the solder portion 16 is not necessarily substantially cylindrical, so the height Ts of the solder portion 16 can also be considered as the axial dimension when the solder portion 16 is placed on the bottom surface 45, and the width Ws of the solder portion 16 can also be considered as the circumferential dimension when the solder portion 16 is placed on the bottom surface 45.

[0046] The length Ls of the solder portion 16 is the length of the portion that corresponds to the height when the solder portion 16 is considered to be substantially cylindrical. In reality, the shape of the solder portion 16 is not necessarily substantially cylindrical, so the length Ls of the solder portion 16 is the length in a direction intersecting the height Ts and width Ws, and can also be considered as the dimension of the solder portion 16 along the direction in which the winding 35a extends. Since the length Ls of the solder portion 16 is usually longer than the height Ts and width Ws, the length Ls of the solder portion 16 can be considered as the dimension of the solder portion 16 in the longitudinal direction.

[0047] From the viewpoint of suppressing external forces acting on the solder portion 16 during the operation of accommodating the solder portion 16 within the accommodating groove 40, it is preferable that the dimensions of the accommodating groove 40 (particularly, the width Wg and the length Lg) are set to a size that has a sufficient margin relative to the dimensions (particularly, the width Ws and the length Ls) of the solder portion 16. If the dimensions of the accommodating groove 40 are small relative to the dimensions of the solder portion 16, the solder portion 16 may be forced into the accommodating groove 40 or may be deformed during the operation of accommodating the solder portion 16 within the accommodating groove 40.

[0048] In the accommodating groove 40 of this embodiment, the solder portion 16 drawn out to the outer edge portion 17 is accommodated in the space 44 from the open areas on the upper side and radially inside of the accommodating groove 40. The accommodating groove 40 accommodates the solder portion 16 in a state in which it is simply placed therein without being fixed. In other words, when accommodating the solder portion 16, the solder portion 16 is not fixed in the accommodating groove 40 with adhesive, protrusions, or the like. In other words, the accommodating groove 40 is not provided with a structure for fixing the accommodated solder portion 16.

[0049] 1 to 5. When assembling the housing 11, first, the rotor 20 and the stator 30 are placed inside the cylindrical portion 11A of the housing 11. Next, the conductors, such as the winding 35a and the lead wires 14 and the ends of the windings 35a, are soldered together. Then, the soldered portion 16 formed by soldering the ends of the windings 35a is placed in the housing groove 40. The portion where the winding 35a and the lead wires 14 are soldered is also placed in a predetermined position. After that, the end bell 12 is combined with the housing 11 to cover the opening 15.

[0050] Finally, a description will be given of the structures of the motor 10 and the blower 1. The motor 10 includes the above-mentioned housing 11, a stator 30 accommodated in the housing 11, and a rotor 20 disposed opposite the stator 30 in the radial direction. The blower 1 of this embodiment includes the motor 10 and an impeller 2 fixed to a shaft 21 (rotating shaft) of the motor 10.

[0051] [2. Effects] (1) In the housing 11 described above, the accommodating groove 40 is provided in the outer edge portion 17 formed radially outward of the opening 15, and this accommodating groove 40 extends in any direction Dg between the normal direction Dn and the tangential direction Dt of the position 30B on the outer periphery 30A. Therefore, the solder portion 16 drawn out radially outward from the opening 15 can be accommodated in the accommodating groove 40 arranged in the outer edge portion 17.

[0052] The solder portion 16, which is formed by soldering together the conductors including the winding 35a, is accommodated in the accommodation groove 40, thereby suppressing deformation of the solder portion 16. Furthermore, because the configuration is such that the solder portion 16 is simply accommodated in the accommodation groove 40, deformation of the solder portion 16 due to external forces can be suppressed compared to the conventional technology in which an adhesive or a protrusion is used to fix the neutral connection. This ensures connection quality, and ultimately improves the quality of the motor 10 and the blower 1.

[0053] Furthermore, the accommodating groove 40 of this embodiment has a space 44 defined by three wall surfaces 41, 42, and 43, and the solder portion 16 can be accommodated in this space 44. Therefore, the solder portion 16 accommodated in the accommodating groove 40 is isolated from other components such as the stator 30 and the winding 35a by the wall surfaces 41, 42, and 43. Therefore, the solder portion 16 accommodated in the accommodating groove 40 does not interfere with other components. Therefore, with a configuration having the space 44 as in this embodiment, deformation of the solder portion 16 can be further suppressed.

[0054] (2) In the above-described housing 11, the radial length Ld of the outer edge portion 17 is set shorter than the longitudinal length Ls of the solder portion 16, and the accommodating groove 40 extends in a direction intersecting with the normal direction Dn. For this reason, the length Lg of the accommodating groove 40 can be formed longer than the radial length Ld of the outer edge portion 17, and the distance (length) over which the solder portion 16 can be accommodated within the accommodating groove 40 can be set longer.

[0055] Therefore, even if the length Ls of the solder portion 16 is longer than the radial length Ld of the outer edge portion 17, the solder portion 16 can be accommodated in the accommodation groove 40 without being bent (deflected). This makes it possible to further prevent the solder portion 16 from being deformed by an external force, and ensures connection quality. Furthermore, since the length Lg of the accommodating groove 40 can be set long and the radial length Ld of the outer edge portion 17 can be reduced, this contributes to making the housing 11 more compact (reducing the size).

[0056] (3) In the housing 11 described above, the accommodating groove 40 extends in a direction intersecting both the normal direction Dn and the tangential direction Dt. This allows the solder portion 16 drawn out to the outer edge portion 17 to be accommodated in the accommodating groove 40 without being subjected to excessive bending deformation. This further prevents the solder portion 16 from being deformed by an external force, ensuring connection quality.

[0057] (4) Furthermore, in the above-described housing 11, the solder portion 16 is accommodated in the accommodation groove 40 in a state in which it is not fixed but is merely placed on the bottom surface 45, so that compared to the conventional technology in which an adhesive or a protrusion is used to fix the neutral connection, external forces are less likely to be applied when accommodating the solder portion 16 in the accommodation groove 40. This reduces the possibility that the solder portion 16 will be deformed by external forces, and connection quality can be ensured.

[0058] (5) According to the motor 10 having the housing 11 described above, at least the same effects as those described in (1) above for the housing 11 can be obtained. Furthermore, if the motor 10 includes the housing 11 having the configuration described in (2) to (4) above, the same effects as those described in (2) to (4) above can be obtained.

[0059] (6) Furthermore, the blower 1 including the motor 10 and the impeller 2 fixed to the shaft 21 of the motor 10 provides at least the same effects as those described in (5) above for the motor 10. In addition, by providing the blower 1 with the motor 10 including the housing 11 having the configurations described in (2) to (4) above, it is possible to provide the same effects as those described in (2) to (4) above.

[0060] [3.Other] The above-described housing 11, motor 10, and blower 1 are merely examples, and the present invention is not limited to the above-described configuration. For example, the housing groove 40 is not limited to a structure having a space 44 defined by wall surfaces 41, 42, and 43 erected from the upper surface of the outer edge portion 17, but may have a structure having a space formed by excavating the upper surface of the outer edge portion 17. In this case, in the space formed by excavating the upper surface of the outer edge portion 17, the wall surfaces arranged on three sides, namely both sides in the circumferential direction and the outer side in the radial direction, become the wall surfaces that define the space.

[0061] It is desirable to reduce the axial dimension (thickness) of the case body of the blower 1 shown in Figures 1 and 2. Therefore, the axial dimension (thickness) of the housing 11 is also reduced. With such a thin housing 11, it is difficult to ensure the thickness required to excavate the outer edge portion 17. Therefore, the structure of the above-mentioned housing groove 40 having the space 44 defined by the erected walls 41, 42, and 43 is advantageous in that it makes it possible to reduce the thickness of the housing 11 and to easily set the height Tg at which the solder portion 16 can be accommodated. It is not necessary for the housing 11 to have a space defined by walls arranged on three sides. For example, a structure in which deformation of the solder portion 16 can be suppressed by providing walls on the sides (two directions) of the solder portion 16 may be used.

[0062] Further, the extension direction Dg of the receiving groove 40 may be a direction that coincides with the normal direction Dn, or may be a direction that coincides with the tangential direction Dt. Furthermore, the radial length Ld of the outer edge portion 17 may be equal to or greater than the longitudinal length Ls of the solder portion 16. In this case, even if the storage groove 40 is structured to extend in a direction that coincides with the normal direction Dn, the length Lg of the storage groove 40 can be set to be equal to or greater than the longitudinal length Ls of the solder portion 16.

[0063] Solder portion 16 is not limited to a portion where ends of winding 35a are soldered together, but may be a portion where winding 35a and lead wire 14 are soldered together, or a portion where lead wires 14 are soldered together.

[0064] Furthermore, the shape of the housing 11 is not limited to the shape shown in the drawings, and may be, for example, a cylindrical shape that does not have the annular portion 11B shown in FIGS. Furthermore, the type of motor 10 is not limited to an inner rotor brushless motor, but may be an outer rotor motor or a brushed motor. The application of the housing 11 having the above-described accommodation groove 40 is not limited to the blower 1, but can be applied to any device. An example of an object other than a blower to which the housing 11 having the accommodation groove 40 can be applied is a plastic gear box. [Explanation of symbols]

[0065] 1 Blower 2 Impeller 10 Motor 11 Blower housing (housing) 11A Cylindrical part 11B Circular section 11c Side wall part 11d bottom 11e Stepped section 11f Flange part 12 Endbell 12a Outer edge 14 Lead wire (conductor) 14A Groove 15 Opening 16 Soldering part 17 Outer edge 18 Peripheral wall 20 Rotors 21 Shaft 22 Magnet 23 Balancer 24 Bearings 25 O-ring 30 Stator 30A Circumference 30B position (circumferential position) 31 Stator core 32 Insulator 35 Coil 35a Winding (conductor) 40 Storage Groove 41,42 Side wall (wall surface) 43 Exterior wall (wall surface) 44 Space 45 Bottom D1 First direction D2 Second direction Dg Extension direction of the accommodation groove Dn Normal direction Dt Tangential direction Ld: Radial length of outer edge Lg Length of the receiving groove Ls Length of soldered part (longitudinal length) Ra,Rb angle range

Claims

1. In a housing that accommodates a stator of a motor, an opening for receiving the stator; an outer edge portion that is formed in a circumferential direction so as to surround an outer periphery of the stator on a radially outer side of the opening and extends in the radial direction; a housing groove in which the conductors including the windings of the stator are soldered to each other and in which the solder portions drawn to the outer edge portion are housed, The housing groove is disposed in the outer edge portion and extends in any direction from a normal direction to the outer circumference at a circumferential position where the housing groove is disposed to a tangential direction to the outer circumference at the circumferential position. A housing comprising:

2. The radial length of the outer edge portion is set shorter than the longitudinal length of the solder portion, The receiving groove extends in a direction intersecting the normal direction.

2. The housing of claim 1 .

3. The receiving groove extends in a direction intersecting both the normal direction and the tangential direction.

3. The housing according to claim 2 .

4. The accommodation groove accommodates the solder portion in a state where the solder portion is simply placed therein without being fixed.

2. The housing of claim 1 .

5. A housing according to any one of claims 1 to 4; A stator accommodated in the housing; A rotor disposed radially opposite the stator. A motor characterized by:

6. A motor according to claim 5; An impeller fixed to the rotating shaft of the motor. A blower characterized by: