Housing, motor, and blower

Abstract

A housing (11) for housing a stator (30) of a motor (10) is provided with: an opening (15) for housing the stator (30); an outer edge part (17) which is formed in the circumferential direction so as to surround the outer periphery (30A) of the stator (30) on the outside in the radial direction with respect to the opening part (15), and which extends in the radial direction; and a housing groove (40) that houses a brazing material section (16) that is drawn out to the outer edge section (17) by brazing wires including the winding (35a) of the stator (30) to each other. The housing 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 housing groove (40) is disposed to a tangential direction of the outer periphery (30A) at the circumferential position.

Description

Technical Field

[0001] The present application relates to a housing for accommodating a stator of a motor, a motor having the stator accommodated in the housing, and a blower using the motor. Background Art

[0002] In a housing for housing a motor stator, a structure is proposed for arranging the ends of a winding forming a coil or a lead wire for supplying power to the winding in a manner that does not interfere with other components. For example, Patent Document 1 discloses the following structure: in a brushless motor, a stator winding is applied to a stator core through an insulating layer, one end of the stator winding constituting each phase is directly connected to the same potential and is set as a neutral point connection, and a fastener or hole for arranging the neutral point connection is provided in a part of the insulating layer. In the technology of Patent Document 1, the neutral point connection is inserted into the fastener or hole and fixed by an adhesive or a protrusion.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 5-308738 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in the technology of fixing and configuring the neutral point connection by using adhesives or the like as in the above-mentioned Patent Document 1, external force is easily applied to the neutral point connection during the fixing operation, so the neutral point connection may be deformed. In particular, when the neutral point connection is brazed, if the brazing material part is deformed due to the external force during the fixing operation, it will lead to a decrease in the connection quality. It should be noted that the same problem as above will also occur in the structure of the part (hereinafter referred to as the "brazing material part") formed by brazing the part connecting the winding and the lead wire, or the part connecting the lead wires to each other. Therefore, in the housing that accommodates the stator, there is still room for improvement in the configuration structure that can suppress the deformation of the brazing material part formed by brazing the conductive wires including the winding wires to each other.

[0008] The housing, motor and blower of the present application are proposed in view of such a problem, and one of the purposes is to suppress the deformation of the brazing material part and ensure the connection quality. It should be noted that it is not limited to this purpose, and another purpose of the present application is to achieve the effects derived from the various structures shown in the specific embodiments described later and the effects that cannot be obtained by the previous technology.

[0009] Solutions to Solve Problems

[0010] The housing, motor and blower disclosed in the present invention can be implemented as the following disclosed solutions (application examples) to solve at least part of the above-mentioned problems. Solutions 2 to 4 are all solutions that can be appropriately selected in addition, and are all solutions that can be omitted. Each of the solutions 2 to 4 does not disclose a solution or a structural solution that is essential to the present application.

[0011] Solution 1. The housing disclosed in the present invention is a housing for accommodating a stator of a motor, and comprises: an opening portion for accommodating the stator; an outer edge portion, which is formed circumferentially in a manner surrounding the outer circumference of the stator on the radially outer side relative to the opening portion, and extends in the radial direction; and a receiving groove, which accommodates a brazing material portion, the brazing material portion being formed by brazing conductive wires including windings of the stator to each other and being led out to the outer edge portion, the receiving groove being arranged in the outer edge portion, and extending in any direction from a normal direction of the outer circumference at a circumferential position where the receiving groove is arranged to a tangent direction of the outer circumference at the circumferential position.

[0012] Solution 2. In the above-mentioned solution 1, preferably, the radial length of the outer edge portion is set shorter than the length of the brazing material portion in the longitudinal direction, and the receiving groove extends in a direction intersecting the normal direction.

[0013] Solution 3. In the above-mentioned solution 1 or 2, preferably, the receiving groove is extended in a direction intersecting both the normal direction and the tangential direction.

[0014] Aspect 4. In any one of aspects 1 to 3 described above, preferably, the accommodation groove accommodates the brazing material part in a state where the brazing material part is not fixed but merely placed.

[0015] A motor of the present disclosure includes: the housing according to any one of the above-mentioned embodiments 1 to 4; a stator accommodated in the housing; and a rotor arranged to face the stator in a radial direction.

[0016] A blower according to the present disclosure includes: the motor according to the above-mentioned claim 5; and an impeller fixed to a rotating shaft of the motor.

[0017] Effects of the Invention

[0018] According to the housing, motor, and blower disclosed herein, since the brazing material portion formed by brazing the conductive wires including the winding wires is accommodated in the accommodation groove disposed in the outer edge portion, deformation of the brazing material portion led out to the outer edge portion can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a plan view for explaining the blower according to the embodiment.

[0020] Figure 2 yes Figure 1 AA section view.

[0021] Figure 3 yes Figure 1 An enlarged view of the main part of the housing.

[0022] Figure 4 It is a schematic diagram for explaining the extending direction of the receiving groove.

[0023] Figure 5 yes Figure 3 BB section view. DETAILED DESCRIPTION

[0024] The housing, motor and blower as embodiments are described with reference to the accompanying drawings. The embodiments shown below are for illustration only and are not intended to exclude various modifications and technical applications not explicitly shown in the following embodiments. The various structures of this embodiment can be modified and implemented in various ways without departing from the main purpose. In addition, they can be selected or discarded as needed, or can be appropriately combined.

[0025] In the embodiment, a case for accommodating a stator of a motor used in a blower will be described as an example of the case.

[0026] 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 the rotating shaft and the direction toward the rotating shaft are defined as the radial direction. In addition, in the radial direction, the rotating shaft side is defined as the radial inner side, and the side opposite thereto (the side away from the rotating shaft) is defined as the radial outer side. The direction perpendicular to the axial direction and circumferential around the rotating shaft is defined as the circumferential direction.

[0027] [1. Structure]

[0028] Figure 1 This is a plan view for explaining the structure of the blower 1 according to the present embodiment, in which the end cover 12 (see FIG. Figure 2 ) are shown so that the internal structure can be understood. Figure 2 yes Figure 1 The blower 1 of this embodiment is a blower 1 that uses an impeller 2 (see Figure 2 ) to transport gas (such as air) by rotating.

[0029] like Figure 1 , Figure 2As shown, the blower 1 includes an impeller 2, a motor 10 as a driving source of the impeller 2, and a blower housing 11 (hereinafter simply referred to as "housing 11") forming a housing for accommodating the impeller 2 and the motor 10. The motor 10 of the present embodiment is an inner rotor type brushless motor, which includes: a shaft 21 (rotational shaft) having a rotation center X, a rotor 20 that rotates integrally with the shaft 21, and a stator 30 located radially outside (hereinafter also simply referred to as "outside") the rotor 20. The stator 30 is accommodated in the housing 11, and the rotor 20 and the stator 30 are arranged opposite to each other in the radial direction (in the present embodiment, in the radial direction inside).

[0030] like Figure 2 As shown, the rotor 20 has a magnet 22 fixed to the shaft 21 and two balancers 23 that clamp the magnet 22 from the axial direction, and is fixed by a bearing 24 so as to be rotatable relative to the housing 11 and the end shield 12. The stator 30 has a stator core 31 fixed to the inner circumference of the housing 11 and a coil 35 wound around the stator core 31 via an insulator 32.

[0031] In this embodiment, if Figure 1 As shown, 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 winding the winding wire 35a in a Y-connection manner, for example. In detail, the six coils 35 constitute any one of the U phase, the V phase, and the W phase, and two coils 35 constituting the same phase are connected to each other by a jumper wire (not shown).

[0032] The lead wire 14 for supplying power to the winding wire 35a is connected by brazing to the end (e.g., the winding start end) of the winding wire 35a forming the coil 35. In addition, in the coil 35 of each phase, the end (hereinafter referred to as "winding end") of the winding wire 35a on the side not connected to the lead wire 14 forms a neutral point connected to one place, and the ends (winding ends) of these winding wires 35a are connected to each other by brazing.

[0033] In this specification, a portion where the conductive wires including the winding 35a of the stator 30 are brazed together is referred to as a “brazing portion.” It should be noted that both the winding 35a and the lead wire 14 are elements included in the “conductive wire” in the claims.

[0034] In the following description, as an example of a "soldering part", a soldering part 16 formed by soldering the winding ends of the coils 35 of each phase is described. The soldering part 16 is a part formed by bundling and soldering the ends of a plurality of windings 35a together, and is therefore formed into a shape extending along the extension direction (length direction) of the windings 35a in the soldering part 16, such as a roughly cylindrical shape or a roughly ellipsoidal shape. It should be noted that the soldering part 16 is not actually limited to being formed into a perfect shape such as a roughly cylindrical shape or a roughly ellipsoidal shape, but is at least formed into a shape with the extension direction of the windings 35a as the length direction.

[0035] In addition, a groove 14A is formed on the upper surface side of the housing 11 so that a plurality of (five in this case) lead wires 14 are led out from the inside of the housing 11 and the end cover 12 to the outside. The number of the grooves 14A is the same as the number of the lead wires 14, and by arranging each lead wire 14 in each groove 14A, the lead wires 14 can be properly laid out from the inside of 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. It should be noted that the number of the lead wires 14 and the connection object are not limited to this.

[0036] like Figure 2 As shown, an impeller 2 is fixed to one end of the shaft 21. The impeller 2 is an impeller for blowing air, and is configured to include, for example, a disc-shaped base portion fixed to the shaft 21, and a plurality of fins radially erected on the disc surface of the base portion. When the motor 10 is operated and the shaft 21 rotates, the impeller 2 rotates as one with the shaft 21.

[0037] The housing 11 has a bottomed cylindrical portion 11A and an annular portion 11B as a portion for accommodating the impeller 2 and the motor 10. The cylindrical portion 11A is a portion in which a configuration space for the motor 10 (i.e., the rotor 20 and the stator 30) is formed, and the annular portion 11B is a portion located outside the cylindrical portion 11A and forms a configuration space for the impeller 2 between the cover member (not shown). 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 extending outward from the side wall portion 11c.

[0038] In addition, in the housing 11 of the present embodiment, a through hole through which the shaft 21 passes 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 portion 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 the lower end portion. A cover member is attached to the lower surface side of the housing 11.

[0039] In the present embodiment, the end shield 12 and the cover member are assembled to the outer casing 11 to form the housing of the blower 1. In other words, the outer casing 11 is one of the components constituting the housing. The housing has a substantially circular appearance when viewed from the axial direction, and the impeller 2 and the motor 10 are arranged (contained) inside. The size of the housing of the blower 1 is set to be able to accommodate at least the impeller 2 and the motor 10. The end shield 12 is a cover member combined with the outer casing 11. In the present embodiment, the outer peripheral end 12a of the end shield 12 is placed on the flange portion 11f of the outer casing 11, and the end shield 12 is fixed relative to the outer casing 11.

[0040] The interior of the cylindrical portion 11A, that is, the space surrounded by the side wall portion 11c and the bottom portion 11d, is the arrangement space of the rotor 20 and the stator 30. Hereinafter, for convenience, the side where the end shield 12 is arranged relative to the housing 11 in the axial direction is referred to as the "first direction D1", and the opposite side is referred to as the "second direction D2". In addition, when the axial direction is assumed to be the up-down direction, the first direction D1 side is referred to as the "upper", and the second direction D2 side is referred to as the "lower".

[0041] like Figure 1 as well as Figure 2 As shown, 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 portion surrounded by the upper edge of the side wall 11c at the upper end of the cylindrical portion 11A, and forms an opening for arranging the rotor 20 and the stator 30 in the cylindrical portion 11A.

[0042] The opening 15 has a substantially circular outline when viewed from the first direction D1. It should be noted that the so-called substantially circular shape is not limited to a perfect circle (circle), but also includes shapes that can be viewed as a circle. For example, the opening 15 can also be a polygonal shape that can be viewed as a circle when viewed from the first direction D1. Figure 2 As schematically shown by the two-dot chain line in FIG. 1 , the opening 15 of the cylindrical portion 11A is covered by the end cover 12 .

[0043] Figure 3 1 is an enlarged view of the main part of the housing 11. Figure 1 as well as Figure 3 As shown, the housing 11 is provided with an outer edge portion 17 and a receiving groove 40. The outer edge portion 17 is formed circumferentially and extends radially in a manner surrounding the outer periphery 30A of the stator 30 on the radially outer side relative to the opening portion 15. The receiving groove 40 receives the brazing material portion 16 led out to the outer edge portion 17.

[0044] When observed from the first direction D1, the outer edge portion 17 is a portion formed in a planar annular shape from the upper end edge of the side wall portion 11c toward the outer side in the radial direction. The planar outer edge portion 17 is formed as a region for arranging the brazing material portion 16 that is led out to the outer side in the radial direction from the stator 30 side. The receiving groove 40 is arranged on the outer edge portion 17, and is a groove-shaped portion for arranging the brazing material portion 16 that is led out to the outer edge portion 17 in a manner that can suppress deformation. In detail, the receiving groove 40 is configured to arrange the brazing material portion 16 in a manner that does not interfere with other components such as the stator 30 and the winding 35a, even if the brazing material portion 16 does not physically contact with other components and is electrically insulated.

[0045] It should be noted that "accommodating the solder portion 16" means that at least a portion of the solder portion 16 is accommodated in the accommodation groove 40. However, in the case where a conductor is arranged around the solder portion 16 and it is desired to avoid contact between the solder portion 16 and the conductor, it is also possible to prevent all portions of the solder portion 16 from being exposed to the outside of the accommodation groove 40. It should be noted that the winding 35a is covered with an insulating material except for the portion that becomes the solder portion 16, so as long as at least the solder portion 16 is accommodated in the accommodation groove 40 (in other words, even if the covered winding 35a that is not soldered is exposed to the outside of the accommodation groove 40), electrical insulation can be ensured.

[0046] In the housing 11 of this embodiment, one receiving groove 40 is provided corresponding to one solder portion 16. Figure 1 as well as Figure 3 As shown, the position of the receiving groove 40 in the outer edge portion 17 can be appropriately set according to the position where the brazing material portion 16 is led out from the stator 30 side, and is preferably set so that the distance from the position where the brazing material portion 16 is led out from the stator 30 side to the receiving groove 40 becomes the shortest distance. The position of the receiving groove 40 can be determined according to the specifications of the coil 35 (i.e., the configuration of the winding 35a of each phase).

[0047] like Figure 1 as well as Figure 3 As shown, the receiving groove 40 is arranged along the normal direction Dn (refer to Figure 4 ) to the tangent direction Dt of the outer periphery 30A at the position 30B (refer to Figure 4 ) to any direction Dg. Specifically, the receiving groove 40 is a portion extending linearly from the position 30B where the receiving groove 40 is arranged on the outer periphery 30A toward the above-mentioned direction Dg. Hereinafter, the extending direction of the receiving groove 40 is also referred to as the "extending direction Dg".

[0048] Figure 4 It is a schematic diagram for explaining the extending direction Dg of the accommodation groove 40 . Figure 4The circle in the figure represents the outer periphery 30A of the stator 30. Position 30B on the outer periphery 30A is the position where the receiving groove 40 is arranged (the radial inner end position of the receiving groove 40). Figure 4 In the figure, the dashed line schematically shows Figure 1 The receiving groove 40 in the housing 11. The normal direction Dn of the outer periphery 30A is the extension direction of the imaginary normal line passing through the position 30B on the outer periphery 30A, which is consistent with the radial direction of the circle (stator 30). In addition, the tangent direction Dt of the outer periphery 30A is the extension direction of the imaginary tangent line passing through the position 30B on the outer periphery 30A. The normal direction Dn can also be said to be a direction perpendicularly intersecting the tangent direction Dt on the plane where the outer periphery 30A extends.

[0049] The extension direction Dg of the receiving groove 40, that is, any direction Dg from the normal direction Dn to the tangent direction Dt, is any direction within the area within the angle range Ra of approximately 90° from the normal direction Dn stored at the position 30B to the tangent direction Dt extending from the position 30B to one side and the angle range Rb of approximately 90° from the position 30B to the tangent direction Dt extending from the other side (that is, within 180° from the tangent direction Dt on one side to the tangent direction Dt on the other side).

[0050] However, if Figure 3 As shown in FIG. 1 , the length Lg of the receiving 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 receiving groove 40. From the perspective of ensuring that the brazing material portion 16 can be accommodated without deformation, the length Lg of the receiving groove 40 is preferably set to be at least longer than the brazing material portion 16. On the other hand, from the perspective of making the housing 11 compact, the radial length Ld of the outer edge portion 17 (see FIG. 1 ) is preferably set to be longer than the brazing material portion 16. Figure 3 , Figure 4 ) expectations are set to be as short as possible.

[0051] Therefore, in order to set the radial length Ld of the outer edge portion 17 as short as possible and to set the length Lg of the receiving groove 40 to be longer, the radial length Ld of the outer edge portion 17 is set shorter than the length Ls of the solder portion 16 in the longitudinal direction, and the receiving groove 40 is extended in a direction intersecting the normal direction Dn. In this way, by setting the receiving groove 40 obliquely to the tangential direction Dt side relative to the normal direction Dn (that is, by making the extension direction Dg inconsistent with the normal direction Dn), the length Lg of the receiving 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 receiving groove 40 can be set shorter than the length Ls of the solder portion 16.

[0052] In addition, in order to ensure that the brazing material portion 16 can be accommodated without deformation, the accommodation groove 40 of the present embodiment extends in a direction intersecting both the normal direction Dn and the tangential direction Dt. Figure 4 As shown, the extending direction Dg of the receiving groove 40 is set to coincide with neither the normal direction Dn nor the tangential direction Dt.

[0053] The solder portion 16 is led out to the outer edge portion 17 in a posture extending in a direction intersecting both the normal direction Dn and the tangential direction Dt. Therefore, if the solder portion 16 is to be led out in a direction consistent with the normal direction Dn or the tangential direction Dt, there is a tendency for the external force applied to the solder portion 16 to increase. In contrast, the structure in which the receiving groove 40 is extended in a direction intersecting both the normal direction Dn and the tangential direction Dt can also be said to be a structure in which it is difficult to apply an external force that deforms the solder portion 16 when the solder portion 16 is received in the receiving groove 40.

[0054] Next, a structure for accommodating the brazing material portion 16 in the accommodating groove 40 will be described. Figure 5 yes Figure 3 BB section view.

[0055] like Figure 1 , Figure 3 as well as Figure 5 As shown, the receiving groove 40 has a space 44 capable of receiving the brazing material portion 16 , which is divided by three wall surfaces 41 , 42 , and 43 arranged on both sides in the circumferential direction and on the outer side in the radial direction with respect to the brazing material portion 16 led out to the outer edge portion 17 and received in the receiving groove 40 .

[0056] The wall surfaces 41 and 42 are wall portions disposed on both sides of the bottom surface 45 of the receiving groove 40 in the circumferential direction. The wall surface 43 is a wall portion disposed on the outer side in the radial direction relative to the bottom surface 45. In addition, the upper surface side and the inner side in the radial direction of the receiving groove 40 are not provided with a wall portion and are open. It should be noted that, hereinafter, when distinguishing between the wall surfaces 41 and 42 and the wall surface 43, the wall surfaces 41 and 42 are referred to as "side walls 41 and 42", and the wall surface 43 is referred to as "outer wall 43".

[0057] exist Figure 3 as well as Figure 5In the structural example shown, each side wall 41, 42 is erected from the upper surface of the outer edge portion 17 toward the first direction D1, and is arranged approximately parallel to each other and separated in the circumferential direction. In addition, the outer wall 43 is erected from the upper surface of the outer edge portion 17 toward the first direction D1. It should be noted that although the outer wall 43 of the present embodiment is formed by a portion of the outer peripheral wall 18 protruding from the outer periphery of the outer edge portion 17 (the outer peripheral edge in the radial direction), the outer wall 43 is not limited to a structure that uses a portion of other parts or components, and it can also be formed by an independent part or component. In addition, in Figure 5 In the embodiment, the upper surface of the outer edge portion 17 and the bottom surface 45 of the receiving groove 40 are located at substantially the same axial position, but the former can be located on the first direction D1 side or on the second direction D2 side compared with the latter. It should be noted that the widths of the two side walls 41 and 42 do not have to be the same.

[0058] The three dimensions of the receiving groove 40 , namely, the height Tg (depth), the width Wg, and the length Lg in the extending direction Dg, are set to be respectively longer than the height Ts, the width Ws, and the length Ls in the longitudinal direction of the brazing part 16 , so as to form a space 44 capable of accommodating the brazing part 16 .

[0059] The height Tg of the receiving groove 40 is the dimension in the axial direction, which is the dimension from the bottom surface 45 to the upper surface of the wall surfaces 41, 42, and 43. Figure 5 In the illustrated receiving groove 40 , the side walls 41 , 42 and the outer wall 43 are formed to have the same height as each other.

[0060] The width Wg of the receiving groove 40 is the dimension of the circumferential separation of the side walls 41 and 42. That is, the width Wg is the distance between the facing surfaces of the side walls 41 and 42, or the dimension (width) of the space 44 in the circumferential direction.

[0061] The length Lg of the receiving groove 40 in the extending direction Dg (see Figure 3 ) can be said to be the distance from the position 30B on the outer periphery 30A of the receiving groove 40 to the outer wall 43 (the length connecting the position 30B and the outer wall 43 in a straight line). The length Lg is determined by the extension direction Dg of the receiving groove 40 and the radial length Ld of the outer edge portion 17.

[0062] The height Ts and width Ws of the solder portion 16 are, for example, the length of the portion corresponding to the outer diameter when the solder portion 16 is regarded as a substantially cylindrical shape. In fact, the shape of the solder portion 16 does not necessarily have to be substantially cylindrical, so the height Ts of the solder portion 16 can also be said to be 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 said to be the circumferential dimension when the solder portion 16 is placed on the bottom surface 45.

[0063] The length Ls of the solder portion 16 is the length of the portion corresponding to the height when the solder portion 16 is regarded as a substantially cylindrical shape. In fact, the shape of the solder portion 16 does not necessarily have to be substantially cylindrical, and the length Ls of the solder portion 16 is the length in the direction intersecting the height Ts and the width Ws, and can also be said to be the dimension in the solder portion 16 along the extension direction of the winding 35a. For the solder portion 16, usually, the length Ls is longer than the height Ts and the width Ws, so the length Ls of the solder portion 16 can be said to be the dimension in the length direction of the solder portion 16.

[0064] In the operation of accommodating the solder portion 16 in the accommodating groove 40, the size (particularly the width Wg and the length Lg) of the accommodating groove 40 is preferably set to have a sufficiently wide size relative to the size (particularly the width Ws and the length Ls) of the solder portion 16 in order to suppress the external force applied to the solder portion 16. If the size of the accommodating groove 40 is smaller than the size of the solder portion 16, the solder portion 16 may be forcibly pressed in or deformed during the operation of accommodating the solder portion 16 in the accommodating groove 40.

[0065] In the receiving groove 40 of the present embodiment, the solder portion 16 led out to the outer edge portion 17 is received in the space 44 from the upper side of the receiving groove 40 and the open portion on the inner side in the radial direction. The receiving groove 40 receives the solder portion 16 in a state where it is not fixed but only placed. That is, in the operation of receiving the solder portion 16, the solder portion 16 is not fixed in the receiving groove 40 by an adhesive, a protrusion, etc. In other words, the receiving groove 40 is not provided with a structure for fixing the received solder portion 16.

[0066] In addition, instructions are included for assembling the above Figure 1~Figure 5 The steps of assembling the housing 11 are as follows. When assembling the housing 11, first, the rotor 20 and the stator 30 are arranged in the cylindrical portion 11A of the housing 11. Next, the wires such as the winding 35a and the lead 14 and the winding ends of the winding 35a are brazed to each other. Then, the brazing material portion 16 formed by brazing the winding ends of the winding 35a is arranged in the receiving groove 40. It should be noted that the portion formed by brazing the winding 35a and the lead 14 is also arranged at a predetermined position. Then, the end cover 12 is assembled to the housing 11 to cover the opening 15.

[0067] Finally, the structures of the motor 10 and the blower 1 will be described. The motor 10 includes the above-mentioned housing 11, the stator 30 accommodated in the housing 11, and the rotor 20 disposed to face the stator 30 in the radial direction.

[0068] The blower 1 of the present embodiment is configured to include the motor 10 and the impeller 2 fixed to the shaft 21 (rotation shaft) of the motor 10 .

[0069] [2. Effect]

[0070] (1) In the housing 11, the outer edge portion 17 formed radially outside the opening portion 15 is provided with a receiving groove 40, which extends in any direction Dg from the normal direction Dn to the tangential direction Dt at the position 30B on the outer periphery 30A. Therefore, the brazing material portion 16 led out radially outside with respect to the opening portion 15 can be received in the receiving groove 40 arranged in the outer edge portion 17.

[0071] By accommodating the solder part 16 formed by soldering the wires including the winding 35a to each other in the accommodating groove 40, the deformation of the solder part 16 can be suppressed. In addition, since the solder part 16 is only accommodated in the accommodating groove 40, the solder part 16 can be suppressed from being deformed by external force compared to the prior art in which the neutral point connection is fixed using an adhesive or a protrusion. Therefore, the connection quality can be ensured, and the quality of the motor 10 and the blower 1 can be improved.

[0072] In addition, the receiving groove 40 of the present embodiment has a space 44 divided by three walls 41, 42, and 43, and the brazing material portion 16 can be accommodated in the space 44. Therefore, the brazing material portion 16 accommodated in the receiving groove 40 is isolated from other components such as the stator 30 and the winding 35a due to the walls 41, 42, and 43. Therefore, the brazing material portion 16 accommodated in the receiving groove 40 does not interfere with other components. Therefore, if it is a structure with a space 44 such as the present embodiment, the deformation of the brazing material portion 16 can be further suppressed.

[0073] (2) In the above-mentioned housing 11, the radial length Ld of the outer edge portion 17 is set shorter than the length Ls of the brazing material portion 16 in the longitudinal direction, and the receiving groove 40 is extended in a direction intersecting the normal direction Dn. Therefore, the length Lg of the receiving groove 40 can be formed to be longer than the radial length Ld of the outer edge portion 17, so that the distance (length) in the receiving groove 40 that can accommodate the brazing material portion 16 can be set longer.

[0074] Therefore, even when 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 applying bending deformation (deflecting) to the solder portion 16. Thus, the solder portion 16 can be further suppressed from being deformed by external force, thereby ensuring the connection quality.

[0075] In addition, since the length Lg of the accommodation groove 40 can be set long and the radial length Ld of the outer edge portion 17 can be suppressed, it is advantageous to make the housing 11 compact (suppress enlargement).

[0076] (3) In addition, in the housing 11, the receiving groove 40 is extended in a direction intersecting both the normal direction Dn and the tangent direction Dt. Therefore, the brazing material portion 16 drawn out to the outer edge portion 17 can be received in the receiving groove 40 without being subjected to excessive bending deformation. Therefore, the brazing material portion 16 can be further suppressed from being deformed by external force, thereby ensuring the connection quality.

[0077] (4) In addition, in the housing 11, the solder part 16 is received in the receiving groove 40 in a state where it is not fixed but merely placed. Therefore, compared with the prior art in which the neutral point connection is fixed using an adhesive or a protrusion, it is difficult for external force to be applied to the receiving groove 40 during the operation of receiving the solder part 16. Therefore, the possibility of deformation of the solder part 16 due to external force can be reduced, thereby ensuring the connection quality.

[0078] (5) According to the motor 10 having the housing 11 described above, at least the same effect as the effect described in (1) above with respect to the housing 11 can be obtained. In addition, if a motor 10 including the housing 11 having the structure described in (2) to (4) is adopted, the same effect as the effect described in (2) to (4) can also be obtained.

[0079] (6) Furthermore, according to the blower 1 including the motor 10 and the impeller 2 fixed to the shaft 21 of the motor 10, at least the same effect as the effect described in the above (5) for the motor 10 can be obtained. It should be noted that the blower 1 can also obtain the same effect as the effect described in the above (2) to (4) by including the motor 10 including the housing 11 having the structure described in the above (2) to (4).

[0080] [3. Others]

[0081] The housing 11 , the motor 10 , and the blower 1 described above are merely examples, and the configurations are not limited to the above configurations.

[0082] For example, the receiving groove 40 is not limited to a structure having a space 44 partitioned by walls 41, 42, 43 erected from the upper surface of the outer edge portion 17, and may be a structure having a space formed by digging out the upper surface of the outer edge portion 17. In this case, the walls arranged on both sides in the circumferential direction and on the outer side in the radial direction in the space formed by digging out the upper surface of the outer edge portion 17 serve as walls partitioning the space.

[0083] It should be noted that in Figure 1 as well as Figure 2In the housing of the blower 1 shown, it is desired to reduce the axial dimension (thickness). Therefore, the axial dimension (thickness) of the housing 11 is also reduced in thickness. In such a thin housing 11, it is difficult to ensure a thickness for digging the outer edge portion 17. Therefore, the structure of the above-mentioned receiving groove 40 having a space 44 divided by the upright walls 41, 42, and 43 is advantageous in that the housing 11 is reduced in thickness and the height Tg capable of accommodating the brazing material portion 16 is easily set.

[0084] It should be noted that the housing 11 does not necessarily need a space partitioned by walls disposed on three sides. For example, a structure capable of suppressing deformation of the brazing part 16 by providing walls on the sides (in two directions) of the brazing part 16 may be adopted.

[0085] In addition, the extending 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.

[0086] In addition, the radial length Ld of the outer edge portion 17 may be greater than the length Ls in the longitudinal direction of the brazing material portion 16. In this case, even if the receiving groove 40 is configured to extend in a direction consistent with the normal direction Dn, the length Lg of the receiving groove 40 can be set to be greater than the length Ls in the longitudinal direction of the brazing material portion 16.

[0087] The brazing material portion 16 is not limited to a portion formed by brazing the ends of the winding wire 35 a , and may be a portion formed by brazing the winding wire 35 a and the lead wire 14 , or a portion formed by brazing the lead wires 14 .

[0088] In addition, the shape of the housing 11 is not limited to the shape shown in the figure, and may be Figure 1 as well as Figure 2 The annular portion 11B shown is cylindrical in shape.

[0089] The type of the motor 10 is not limited to an inner rotor type brushless motor, and the motor 10 may be applied to an outer rotor type motor or a brushed motor.

[0090] The application object of the housing 11 having the storage groove 40 is not limited to the blower 1, and can be applied to any device. An example of an object other than a blower to which the housing 11 having the storage groove 40 can be applied is a resin gear box.

[0091] Description of Reference Numerals

[0092] 1 Blower; 2 Impeller; 10 Motor; 11 Blower housing (housing); 11A Cylindrical portion; 11B Ring portion; 11c Side wall portion; 11d Bottom portion; 11e Step portion; 11f Flange portion; 12 End shield; 12a Outer peripheral end portion; 14 Lead wire (conducting wire); 14A Groove portion; 15 Opening portion; 16 Brazing material portion; 17 Outer edge portion; 18 Outer peripheral wall; 20 Rotor; 21 Shaft; 22 Magnet; 23 Balancer; 24 Bearing; 25 O-ring; 30 Stator; 30A Outer periphery; 30B Position (circumferential position); 31 Stator core; 32 Insulator; 35 Coil; 35a Winding wire (conducting wire); 40 Accommodating groove; 41, 42 Side wall (wall surface); 43 Outer wall (wall surface); 44 Space; 45 Bottom surface; D1 first direction; D2 second direction; Dg extension direction of the receiving groove; Dn normal direction; Dt tangent direction; Ld radial length of the outer edge; Lg length of the receiving groove; Ls length of the solder part (length direction); Ra, Rb angle range.

Claims

1. A housing for housing a stator of a motor, characterized in that: The housing comprises: an opening portion, which is used to accommodate the stator; an outer edge portion formed in a circumferential direction so as to surround the outer circumference of the stator on the outer side in the radial direction relative to the opening portion and extending in the radial direction; as well as a receiving groove that receives a brazing material portion formed by brazing conductive wires including windings of the stator and led out to the outer edge portion, The receiving groove is arranged in the outer edge portion, and extends in any direction from a normal direction of the outer periphery at a circumferential position where the receiving groove is arranged to a tangential direction of the outer periphery at the circumferential position.

2. The housing according to claim 1, characterized in that The radial length of the outer edge portion is set shorter than the length of the brazing material portion in the longitudinal direction. The receiving groove is extended along a direction intersecting the normal direction.

3. The housing according to claim 2, characterized in that The receiving groove is extended in a direction intersecting both the normal direction and the tangential direction.

4. The housing according to claim 1, characterized in that The receiving groove receives the brazing material portion in a state where the brazing material portion is not fixed but merely placed.

5. A motor, characterized in that: The motor has: The housing according to any one of claims 1 to 4; a stator received in the housing; and A rotor is arranged to face the stator in a radial direction.

6. A blower, characterized in that: The blower has: The motor according to claim 5; and An impeller is fixed to the rotating shaft of the motor.

Images