Housing, motor and blower

Abstract

The housing (11) housing the stator (30) of the motor (10) includes: an opening (15) for housing the stator (30); an outer edge (17) formed circumferentially around the outer periphery (30A) of the stator (30) relative to the opening (15) and extending radially; and a receiving groove (40) for housing a brazing part (16) formed by brazing wires including the winding (35a) of the stator (30) to each other and led out to the outer edge (17). The receiving groove (40) is disposed on the outer edge (17) and extends in any direction from the normal direction of the outer periphery (30A) at the circumferential position where the receiving groove (40) is disposed to the tangential direction of the outer periphery (30A) at the circumferential position.

Description

Technical Field

[0001] This application relates to a housing for housing a stator of a motor, a motor having a stator housed in the housing, and a blower using the motor. Background Technology

[0002] Within the housing of the motor stator, a structure has been proposed for arranging the ends of wires, such as coil windings or leads for supplying power to the windings, in a manner that does not interfere with other components. For example, Patent Document 1 discloses a structure in which stator windings are applied to the stator core through an insulating layer, and one end of each phase of the stator winding is directly connected to the neutral point connection so that they are at the same potential. A fastener or hole for arranging the neutral point connection is provided in a portion of the insulating layer. In the technology of Patent Document 1, the neutral point connection is inserted into the fastener or hole and secured by adhesive or a protrusion.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 5-308738 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in techniques such as Patent Document 1 described above that use adhesives to fix and configure the neutral point wiring, external force is easily applied to the neutral point wiring during the fixing operation, which may cause deformation of the neutral point wiring. In particular, if the neutral point wiring is brazed, the brazing filler metal will deform due to the external force during the fixing operation, resulting in a decrease in connection quality. It should be noted that the same problem may occur not only with neutral point wiring that connects one end of the windings to each other, but also in structures that configure the portion (hereinafter referred to as the "brazing filler metal portion") formed by brazing the connection between the windings and leads, or the portion that connects the leads to each other. Therefore, there is still room for improvement in the configuration structure of the stator housing that can suppress deformation of the brazing filler metal portion formed by brazing the wires, including the windings, to each other.

[0008] The housing, motor, and blower of this application were proposed in view of such a problem, one of the purposes of which is to suppress deformation of the solder portion and ensure connection quality. It should be noted that this application is not limited to this purpose; another purpose is to achieve the effects derived from the structures shown in the specific embodiments described later, and to achieve effects that cannot be obtained by conventional techniques.

[0009] Solution for solving the problem

[0010] The housing, motor, and blower disclosed herein can be implemented as the solutions (application examples) disclosed below, solving at least a portion of the aforementioned problems. Solutions 2 to 4 are all alternatively selectable solutions and can be omitted. None of the solutions 2 to 4 are essential to this application in terms of the disclosed solutions or structures.

[0011] Option 1. The housing disclosed herein is a housing for housing the stator of a motor, comprising: an opening for housing the stator; an outer edge portion formed circumferentially around the outer periphery of the stator relative to the radially outer side of the opening, and extending along the radial direction; and a receiving groove for housing a brazing portion formed by brazing wires including the windings of the stator to each other and led out to the outer edge portion, the receiving groove being disposed on the outer edge portion and extending in any direction from the normal direction of the outer periphery at the circumferential position where the receiving groove is disposed to the tangential direction of the outer periphery at the circumferential position.

[0012] Option 2. Based on Option 1 above, preferably, the radial length of the outer edge is set to be shorter than the length of the solder portion in the longitudinal direction, and the receiving groove extends in a direction intersecting the normal direction.

[0013] Option 3. Based on Option 1 or 2 above, it is preferred that the receiving groove extends in a direction that intersects both the normal direction and the tangential direction.

[0014] Option 4. Based on any of the options 1 to 3 above, it is preferred that the receiving groove receives the solder part in a state where the solder part is not fixed but merely placed.

[0015] Option 5. The motor disclosed herein comprises: a housing as described in any of options 1 to 4 above; a stator housed in the housing; and a rotor arranged radially opposite to the stator.

[0016] Option 6. The blower of this disclosure comprises: the motor described in Option 5 above; and an impeller fixed to the rotating shaft of the motor.

[0017] Invention Effects

[0018] According to the housing, motor, and blower disclosed herein, the brazing filler portion, which is formed by brazing wires including windings together, is housed in a receiving groove disposed on the outer edge, thereby suppressing deformation of the brazing filler portion led out to the outer edge. Attached Figure Description

[0019] Figure 1 This is a top view used to illustrate the blower involved in the implementation method.

[0020] Figure 2 yes Figure 1 AA-direction sectional view.

[0021] Figure 3 yes Figure 1 Enlarged view of the main parts of the outer shell.

[0022] Figure 4 This is a schematic diagram used to illustrate the extension direction of the receiving tank.

[0023] Figure 5 yes Figure 3 BB-direction sectional view. Detailed Implementation

[0024] The housing, motor, and blower, as embodiments, will be described with reference to the accompanying drawings. The embodiments shown below are merely illustrative and are not intended to exclude various modifications and technical applications not explicitly shown in these embodiments. The structures of this embodiment can be modified and implemented in various ways without departing from its spirit. Furthermore, selections can be made as needed, or appropriate combinations can be made.

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

[0026] In the following description, the direction in which the motor's rotation axis extends (rotation axis direction) is defined as axial, and the direction orthogonal to the axial direction and away from the rotation axis, as well as the direction toward the rotation axis, are defined as radial. Furthermore, in the radial direction, the side facing the rotation axis is defined as the inner radial direction, and the opposite side (the side away from the rotation axis) is defined as the outer radial direction. The direction orthogonal to the axial direction and surrounding the rotation axis is defined as circumferential.

[0027] [1. Structure]

[0028] Figure 1 This is a top view used to explain the structure of the blower 1 according to this embodiment, omitting the end cover 12 (see reference). Figure 2 The internal structure is shown in the diagram so that its internal structure can be understood. Figure 2 yes Figure 1 A sectional view along line AA. The blower 1 in this embodiment utilizes an impeller 2 (see reference AA). Figure 2 A blower that uses the rotation of a fan to deliver gas (such as air).

[0029] like Figure 1 , Figure 2As shown, the blower 1 includes an impeller 2, a motor 10 that serves as the drive source for the impeller 2, and a blower housing 11 (hereinafter simply referred to as "housing 11") that forms a housing that encloses the impeller 2 and the motor 10. The motor 10 in this embodiment is an internal rotor type brushless motor, which includes: a shaft 21 (rotation shaft) having a rotation center X, a rotor 20 that rotates integrally with the shaft 21, and a stator 30 located radially outward (hereinafter also simply referred to as "outer side") of the rotor 20. The stator 30 is housed in the housing 11, and the rotor 20 and the stator 30 are arranged radially (inner radially in this embodiment) opposite each other.

[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 axially, and is fixed by bearings 24 to be rotatable relative to the housing 11 and the end cover 12. The stator 30 has a stator core 31 fixed to the inner circumferential surface of the housing 11 and a coil 35 wound relative to the stator core 31 through an insulating member 32.

[0031] In this embodiment, such as Figure 1 As shown, a stator 30 having six coils 35 arranged at equal intervals along the circumference is taken as an example. The six coils 35 of the stator 30 are formed by winding wire 35a in a Y-connection manner, for example. In detail, the six coils 35 constitute any one of the U phase, V phase, and W phase, and two coils 35 constituting the same phase are connected to each other by a tie wire (not shown).

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

[0033] In this specification, the portion formed by brazing the conductors of the winding 35a of the stator 30 to each other is referred to as the "brazing part". It should be noted that both the winding 35a and the lead wire 14 are elements included in the "conductor" in the technical solution.

[0034] In the following description, as an example of a "solder section," a solder section 16 formed by brazing the winding ends of the coils 35 of each phase to each other will be described. This solder section 16 is a portion formed by bundling and brazing the ends of multiple windings 35a together, and therefore is formed into a shape that extends along the extension direction (length direction) of the windings 35a in the solder section 16, such as a generally cylindrical shape or a generally elliptical shape. It should be noted that the solder section 16 is not actually limited to being formed into a perfect shape such as a generally cylindrical shape or a generally elliptical shape, but is at least formed into a shape with the extension direction of the windings 35a as the length direction.

[0035] Furthermore, grooves 14A are formed on the upper surface of the housing 11 to allow multiple (five in this case) leads 14 to be led out from the inside of the housing 11 and the end cover 12 to the outside. The number of grooves 14A is the same as the number of leads 14. By arranging each lead 14 in each groove 14A, the leads 14 can be appropriately arranged from the inside of the housing 11 to the outside. In this embodiment, three of the five leads 14 are connected to the winding 35a, and the remaining two are connected to electronic devices other than the winding 35a, such as a temperature sensor. It should be noted that the number of leads 14 and the connected objects 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 air-blowing impeller, for example, configured to include a disc-shaped base fixed to the shaft 21 and multiple fins radially erected on the disc surface of the base. When the motor 10 operates and the shaft 21 rotates, the impeller 2 becomes integral with the shaft 21 and rotates.

[0037] The outer casing 11 has a bottomed cylindrical portion 11A and an annular portion 11B, which serve as housings for the impeller 2 and the motor 10. The cylindrical portion 11A is the portion that forms the configuration space for the motor 10 (i.e., the rotor 20 and the stator 30), and the annular portion 11B is the portion located outside the cylindrical portion 11A and forms the configuration space for the impeller 2 between it and a cover member (not shown). The annular portion 11B is continuously formed outward from the outer periphery of the side wall portion 11c of the cylindrical portion 11A. The upper end of the annular portion 11B functions as a flange portion 11f extending outward from the side wall portion 11c.

[0038] Furthermore, in the housing 11 of this embodiment, a through hole for the shaft 21 to pass through and a stepped portion 11e for fixing the bearing 24 and the O-ring 25 are provided at the bottom 11d of the cylindrical portion 11A. The lower end of the shaft 21 protrudes from the through hole toward the lower surface of the housing 11, and an impeller 2 is fixed to the lower end. A cover member is installed on the lower surface of the housing 11.

[0039] In this embodiment, the end cover 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 generally circular appearance when viewed from the axial direction, and the impeller 2 and the motor 10 are disposed (received) inside. The dimensions of the blower 1 housing are set to at least accommodate the impeller 2 and the motor 10. The end cover 12 is a cover member combined with the outer casing 11. In this embodiment, the outer peripheral end 12a of the end cover 12 is mounted on the flange 11f of the outer casing 11, and the end cover 12 is fixed relative to the outer casing 11.

[0040] The interior of the aforementioned cylindrical portion 11A, specifically the space enclosed by the side wall portion 11c and the bottom portion 11d, is the space for arranging the rotor 20 and the stator 30. Hereinafter, for convenience, the side in the axial direction relative to the housing 11 where the end cover 12 is arranged will be referred to as "first direction D1," and the opposite side will be referred to as "second direction D2." Furthermore, assuming the axial direction is vertical, the first direction D1 side will be referred to as "upper," and the second direction D2 side will be referred to as "lower."

[0041] like Figure 1 as well as Figure 2 As shown, the housing 11 has an opening 15 for receiving the stator 30. The opening 15 receives the stator 30 axially. The opening 15 is a portion formed at the upper end of the cylindrical portion 11A by the upper edge of the side wall portion 11c, and is an opening for arranging the rotor 20 and the stator 30 within the cylindrical portion 11A.

[0042] The opening 15 has a generally circular outline when viewed from the first direction D1. It should be noted that "generally circular" is not limited to a perfect circle, but also includes shapes that can be considered circular. For example, the opening 15 could also be a polygon that can be considered circular when viewed from the first direction D1. Figure 2 As schematically shown with double-dotted lines, the opening 15 of the cylindrical portion 11A is covered by the end cap 12.

[0043] Figure 3 This is an enlarged view of the main parts of the outer casing 11. (See image below.) Figure 1 as well as Figure 3 As shown, the outer casing 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 around the outer periphery 30A of the stator 30 relative to the outer side of the opening 15. The receiving groove 40 receives the solder portion 16 that is led out to the outer edge portion 17.

[0044] When viewed from the first direction D1, the outer edge 17 is a planar, annular portion formed radially outward from the upper edge of the sidewall portion 11c. This planar outer edge 17 is formed as a region for arranging the solder portion 16, which extends radially outward from the stator 30 side. A receiving groove 40 is disposed on the outer edge 17 and is a groove-shaped portion for arranging the solder portion 16 extended to the outer edge 17 in a manner that can suppress deformation. In detail, the receiving groove 40 is configured to arrange the solder portion 16 in a manner that does not interfere with other components such as the stator 30 and the winding 35a, so that the solder portion 16 does not have physical 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 housed within the receiving groove 40. However, if a conductor or the like is arranged around the solder portion 16 and it is desired to prevent the solder portion 16 from contacting the conductor, it is also possible to ensure that none of the portions of the solder portion 16 are exposed outside the receiving groove 40. It should be noted that the winding 35a, except for the portion that becomes the solder portion 16, is covered by an insulating material. Therefore, as long as at least the solder portion 16 is housed within the receiving groove 40 (in other words, even if the covered portion of the winding 35a that is not soldered is exposed outside the receiving groove 40), electrical insulation can be ensured.

[0046] In this embodiment, a receiving groove 40 is provided on the outer casing 11, corresponding to a solder section 16. For example... 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 solder portion 16 is led out from the stator 30 side. Preferably, the distance from the position where the solder portion 16 is led out from the stator 30 side to the receiving groove 40 is 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 windings 35a of each phase).

[0047] like Figure 1 as well as Figure 3 As shown, the receiving slot 40 extends along the normal direction Dn from the outer periphery 30A of the location (circumferential position) where the receiving slot 40 is located (refer to... Figure 4 The tangent direction Dt from the outer perimeter 30A at position 30B to that location (refer to...) Figure 4 The receiving groove 40 extends in any direction Dg up to the outer periphery 30A. Specifically, the receiving groove 40 is a portion that extends in a straight line from the position 30B on which the receiving groove 40 is disposed on the outer periphery 30A towards the aforementioned direction Dg. Hereinafter, the extending direction of the receiving groove 40 will also be referred to as the "extending direction Dg".

[0048] Figure 4 This is a schematic diagram used to explain the extension direction Dg of the receiving tank 40. Figure 4The circle in the diagram represents the outer perimeter 30A of the stator 30. Position 30B on the outer perimeter 30A is the location where the receiving groove 40 is positioned (the radially inner end position of the receiving groove 40). Additionally, in Figure 4 In the middle, it is schematically shown with dashed lines. Figure 1 The receiving groove 40 is located in the outer casing 11. The normal direction Dn of the outer periphery 30A is the extension direction of the imaginary normal line passing through 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 the imaginary tangent line passing through position 30B on the outer periphery 30A. The normal direction Dn can also be described as the direction that intersects the tangential direction Dt perpendicularly on the plane extending from the outer periphery 30A.

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

[0050] However, as Figure 3 As shown, the length Lg of the receiving groove 40 in the extension direction Dg is defined by the radial length Ld of the outer edge 17 (the dimension of the outer edge 17 extending radially) and the extension direction Dg of the receiving groove 40. From the viewpoint of ensuring the containment of the solder portion 16 without deformation, the length Lg of the receiving 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 more compact, the radial length Ld of the outer edge 17 (refer to...) Figure 3 , Figure 4 The expectation is to be set as short as possible.

[0051] Therefore, in order to make the radial length Ld of the outer edge portion 17 as short as possible and the length Lg of the receiving groove 40 as long as possible, the radial length Ld of the outer edge portion 17 is set to be shorter than the length Ls of the solder portion 16 in the length direction, and the receiving groove 40 extends in a direction intersecting the normal direction Dn. In this way, by setting the receiving groove 40 at an inclination relative to the normal direction Dn towards the tangential direction Dt (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 to be 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 to be shorter than the length Ls of the solder portion 16, the length Lg of the receiving groove 40 can still be set to be shorter than the length Ls of the solder portion 16.

[0052] Furthermore, from the viewpoint of ensuring the containment of the solder portion 16 without deformation, the containment groove 40 of this embodiment extends in a direction intersecting both the normal direction Dn and the tangential direction Dt. That is, as... Figure 4 As shown, the extension direction Dg of the receiving slot 40 is set to be neither consistent with the normal direction Dn nor with the tangential direction Dt.

[0053] The solder portion 16 is extended to the outer edge portion 17 in a direction that intersects both the normal direction Dn and the tangential direction Dt. Therefore, if the solder portion 16 is extended 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, a structure in which the receiving groove 40 extends in a direction that intersects both the normal direction Dn and the tangential direction Dt can be said to be a structure in which it is difficult to apply an external force that would deform the solder portion 16 when it is received in the receiving groove 40.

[0054] Next, the structure for accommodating the solder section 16 in the receiving tank 40 will be described. Figure 5 yes Figure 3 BB-direction sectional 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 solder part 16, which is divided by three wall surfaces 41, 42, and 43 arranged on the two sides in the circumferential direction and the outer side in the radial direction relative to the solder part 16 that is led out to the outer edge 17 and received in the receiving groove 40.

[0056] 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. 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 open without wall portions. It should be noted that, in the following, when distinguishing between wall surfaces 41, 42 and wall surface 43, wall surfaces 41 and 42 will be referred to as "side walls 41 and 42", and wall surface 43 will be referred to as "outer wall 43".

[0057] exist Figure 3 as well as Figure 5In the structural example shown, each sidewall 41, 42 is erected from the upper surface of the outer edge 17 in the first direction D1, and is arranged substantially parallel to each other in a circumferentially separated manner. Additionally, the outer wall 43 is erected from the upper surface of the outer edge 17 in the first direction D1. It should be noted that although the outer wall 43 in this embodiment is formed from a portion of the outer peripheral wall 18 protruding from the outer periphery (radially outer periphery) of the outer edge 17, the outer wall 43 is not limited to a structure that incorporates a portion of other parts or components; it can also be formed from a separate part or component. Furthermore, in Figure 5 In this configuration, the upper surface of the outer edge 17 and the bottom surface 45 of the receiving groove 40 are located at approximately the same axial position, but the former can be located on the first direction D1 side or the second direction D2 side relative to the latter. It should be noted that the widths of the two side walls 41 and 42 do not necessarily have to be the same.

[0058] The three dimensions of the receiving groove 40—height Tg (depth), width Wg, and length Lg in the extension direction Dg—are set to be longer than the height Ts, width Ws, and length Ls of the solder part 16, respectively, so as to form a space 44 that can accommodate the solder part 16.

[0059] The height Tg of the receiving groove 40 is the axial dimension, which is the dimension from the bottom surface 45 to the upper surface of the walls 41, 42, and 43. It should be noted that... Figure 5 In the shown receiving tank 40, the side walls 41, 42 and the outer wall 43 are formed to be the same height as each other.

[0060] The width Wg of the receiving slot 40 is the dimension by which the side walls 41 and 42 are separated from each other circumferentially. That is, the width Wg is the distance between the facing surfaces of the side walls 41 and 42, or it can be said to be the circumferential dimension (width) of the space 44.

[0061] The length Lg of the receiving slot 40 along the extension direction Dg (refer to) Figure 3 It can be said to be the distance from position 30B on the outer periphery 30A of the receiving groove 40 to the outer wall 43 (the length of the straight line connecting position 30B and outer wall 43). This length Lg is defined by the extension direction Dg of the receiving groove 40 and the radial length Ld of the outer edge 17.

[0062] The height Ts and width Ws of the solder portion 16 are, for example, the lengths of the portion corresponding to the outer diameter when the solder portion 16 is considered to be approximately cylindrical. In reality, the shape of the solder portion 16 does not necessarily have to be approximately cylindrical; therefore, the height Ts of the solder portion 16 can also be described 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 described as 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 its height when the solder portion 16 is considered to be approximately cylindrical. In reality, the shape of the solder portion 16 does not necessarily have to be approximately cylindrical. The length Ls of the solder portion 16 is the length in the direction intersecting the height Ts and width Ws, or it can be described as the dimension along the extension direction of the winding 35a within the solder portion 16. Generally, for the solder portion 16, the length Ls is longer than both the height Ts and the width Ws; therefore, the length Ls of the solder portion 16 can be considered as the dimension along the length direction of the solder portion 16.

[0064] In the operation of accommodating the solder portion 16 within the receiving groove 40, from the viewpoint of suppressing the external force applied to the solder portion 16, the dimensions of the receiving groove 40 (particularly the width Wg and length Lg) are preferably set to be sufficiently large relative to the dimensions of the solder portion 16 (particularly the width Ws and length Ls). If the dimensions of the receiving groove 40 are smaller than the dimensions of the solder portion 16, there is a possibility that the solder portion 16 may be forcibly pressed in or deformed during the operation of accommodating the solder portion 16 within the receiving groove 40.

[0065] In the receiving groove 40 of this embodiment, the solder portion 16, which is led out to the outer edge 17, is received into the space 44 from the upper side and the radially inner side of the receiving groove 40. The receiving groove 40 receives the solder portion 16 in a state where it is not fixed but merely 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 adhesive, protrusions, etc. In other words, the receiving groove 40 is not provided with a structure to fix the received solder portion 16.

[0066] Additionally, instructions for assembling the above are attached. Figures 1-5 The steps for assembling the housing 11 are as follows: First, the rotor 20 and stator 30 are placed inside the cylindrical portion 11A of the housing 11. Next, the wires, such as the winding wire 35a and the lead wire 14, and the winding ends of the winding wire 35a, are brazed together. Then, the brazing filler portion 16, formed by brazing the winding ends of the winding wire 35a, is placed in the receiving groove 40. It should be noted that the portion formed by brazing the winding wire 35a and the lead wire 14 is also placed in a predetermined position. Then, the housing 11 assembly end cover 12 is attached to cover the opening 15.

[0067] Finally, the construction of the motor 10 and the blower 1 will be described. The motor 10 includes the aforementioned housing 11, a stator 30 housed in the housing 11, and a rotor 20 arranged radially opposite to the stator 30.

[0068] Furthermore, the blower 1 in this embodiment is configured to include the motor 10 and an impeller 2 fixed to the shaft 21 (rotation shaft) of the motor 10.

[0069] [2. Effects]

[0070] (1) In the outer casing 11 described above, a receiving groove 40 is provided on the outer edge 17 formed on the radially outer side of the opening 15. The receiving groove 40 extends along any direction Dg from the normal direction Dn to the tangential direction Dt at position 30B on the outer periphery 30A. Therefore, the solder portion 16, which is led out radially outward relative to the opening 15, can be received in the receiving groove 40 provided on the outer edge 17.

[0071] By housing the brazing filler portion 16, which includes the wires wound 35a, together in the receiving groove 40, deformation of the brazing filler portion 16 can be suppressed. Furthermore, since the brazing filler portion 16 is housed solely in the receiving groove 40, deformation of the brazing filler portion 16 due to external forces can be suppressed compared to existing technologies that use adhesives or protrusions to fix the neutral point connection. Therefore, connection quality can be ensured, thereby improving the quality of the motor 10 and the blower 1.

[0072] Furthermore, the receiving groove 40 of this embodiment has a space 44 divided by three walls 41, 42, and 43, which can accommodate the solder portion 16. Therefore, the solder portion 16 accommodated in the receiving groove 40 is isolated from other components such as the stator 30 and the winding 35a by the walls 41, 42, and 43. Therefore, the solder portion 16 accommodated in the receiving groove 40 does not interfere with other components. Therefore, with a structure having a space 44 as in this embodiment, deformation of the solder portion 16 can be further suppressed.

[0073] (2) In the outer casing 11 described above, the radial length Ld of the outer edge portion 17 is set to be shorter than the length Ls of the solder portion 16 in the longitudinal direction, and the receiving groove 40 extends in a direction intersecting the normal direction Dn. Therefore, the length Lg of the receiving groove 40 can be made longer than the radial length Ld of the outer edge portion 17, thereby allowing the distance (length) within the receiving groove 40 that can accommodate the solder portion 16 to be set to be 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, it is possible to receive the solder portion 16 into the receiving groove 40 without subjecting it to bending deformation (deflection). As a result, deformation of the solder portion 16 due to external force can be further suppressed, thereby ensuring connection quality.

[0075] In addition, since the length Lg of the receiving groove 40 can be set to be longer and the radial length Ld of the outer edge 17 can be suppressed, it is beneficial to make the outer shell 11 more compact (suppressing large size).

[0076] (3) Furthermore, in the aforementioned housing 11, the receiving groove 40 extends in a direction intersecting both the normal direction Dn and the tangential direction Dt. Therefore, the solder portion 16, which is led out to the outer edge 17, can be received into the receiving groove 40 in a manner that does not subject the solder portion 16 to excessive bending deformation. Thus, it is possible to further suppress the deformation of the solder portion 16 due to external forces, thereby ensuring connection quality.

[0077] (4) Furthermore, in the aforementioned housing 11, the solder part 16 is housed in the receiving groove 40 in a state where it is not fixed but merely placed. Therefore, compared to the prior art that uses adhesives or protrusions to fix the neutral point, external forces are less likely to be applied to the receiving groove 40 during the operation of housing the solder part 16. Thus, the possibility of the solder part 16 deforming due to external forces can be reduced, thereby ensuring connection quality.

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

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

[0080] [3. Other]

[0081] The aforementioned housing 11, motor 10, and blower 1 are examples, and the structure is not limited to those described above.

[0082] For example, the receiving groove 40 is not limited to having a space 44 divided by walls 41, 42, and 43 erected from the upper surface of the outer edge 17; it can also be a structure having a space formed by excavating the upper surface of the outer edge 17. In this case, the walls arranged on both sides in the circumferential direction and the outer side in the radial direction in the space formed by excavating the upper surface of the outer edge 17 become the walls that divide 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 desirable to reduce the axial dimension (thickness). Therefore, the axial dimension (thickness) of the outer casing 11 is also reduced. In such a thin outer casing 11, it is difficult to ensure the thickness for digging the outer edge 17. Therefore, the aforementioned receiving groove 40, which has a space 44 divided by the upright walls 41, 42, 43, is advantageous in reducing the thickness of the outer casing 11 and in making it easy to set the height Tg that can accommodate the brazing filler metal portion 16.

[0084] It should be noted that the outer casing 11 does not necessarily need to be divided by walls disposed on three sides. For example, a structure in which deformation of the solder section 16 can be suppressed by providing walls on the sides (in two directions) of the solder section 16.

[0085] In addition, the extension direction Dg of the receiving slot 40 can be the same as the normal direction Dn, or it can be the same as the tangent direction Dt.

[0086] Furthermore, the radial length Ld of the outer edge 17 can also be greater than or equal to the length Ls of the solder portion 16 in the longitudinal direction. 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 or equal to the length Ls of the solder portion 16 in the longitudinal direction.

[0087] The brazing part 16 is not limited to the part formed by brazing the ends of the brazing winding 35a to each other; it can also be the part formed by brazing the brazing winding 35a and the lead wire 14, or the part formed by brazing the lead wire 14 to each other.

[0088] Furthermore, the shape of the outer casing 11 is not limited to the shape shown in the figure; for example, it may also be without a shape. Figure 1 as well as Figure 2 The annular portion 11B shown has a cylindrical shape.

[0089] In addition, the type of motor 10 is not limited to internal rotor type brushless motors, but can also be applied to external rotor type motors, and can also be applied to brushed motors.

[0090] The application of the housing 11 with the aforementioned receiving slot 40 is not limited to the blower 1, but can be applied to any device. As an example of an object other than a blower that can be used with the housing 11 with the receiving slot 40, there is a resin gearbox.

[0091] Explanation of reference numerals in the attached figures

[0092] 1 Blower; 2 Impeller; 10 Motor; 11 Blower housing; 11A Cylindrical section; 11B Annular section; 11c Side wall section; 11d Bottom; 11e Stepped section; 11f Flange section; 12 End cover; 12a Outer peripheral end; 14 Lead wire; 14A Slot; 15 Opening; 16 Brazing filler metal section; 17 Outer edge; 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; 40 Receiving slot; 41, 42 Side wall; 43 Outer wall; 44 Space; 45 Bottom surface; D1 First direction; D2 Second direction; Dg Extension direction of the receiving groove; Dn Normal direction; Dt Tangential direction; Ld Radial length of the outer edge; Lg Length of the receiving groove; Ls Length of the solder part (length in the length direction); Ra, Rb Angle range.

Claims

1. A housing housing the stator of a motor, characterized in that, The outer casing includes: An opening for receiving the stator is covered by an end cap; The outer edge portion is formed circumferentially around the outer periphery of the stator relative to the radially outer side of the opening portion, and extends radially; as well as A receiving groove for receiving a brazing filler portion, the brazing filler portion being formed by brazing wires including the stator windings together and led out to the outer edge. The receiving groove is disposed on the outer edge and extends in any direction from the normal direction of the outer periphery at the circumferential position where the receiving groove is disposed to the tangential direction of the outer periphery at the circumferential position. The space for housing the stator and the space for housing the solder portion are arranged within the space defined by the housing and the end cover.

2. The outer casing according to claim 1, characterized in that, The radial length of the outer edge is set to be shorter than the length of the solder portion in the longitudinal direction. The receiving groove extends in a direction that intersects the normal direction.

3. The outer casing according to claim 2, characterized in that, The receiving groove extends in a direction that intersects both the normal direction and the tangential direction.

4. The outer casing according to claim 1, characterized in that, The receiving slot receives the solder portion in a state where the solder portion is not fixed but merely placed.

5. A motor, characterized in that, The motor has the following features: The housing as claimed in any one of claims 1 to 4; The stator housed within the outer casing; and A rotor that is radially opposite the stator.

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

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