Blower housing, blower wiring structure and blower

Abstract

A blower housing (11) of a blower (1) having a motor (10) has an accommodating portion (40) for accommodating a winding (35) and a solder portion (16) of the stator (30) radially outward from an opening (15) that accommodates the stator (30) of the motor (10). The accommodating portion (40) has a bottom portion (41) and an inner wall portion (42). The bottom portion (41) includes a first portion (44) in which the conductor is arranged and a second portion (45) in which the solder portion (16) is arranged. The second portion (45) is recessed to a deeper position than the first portion (44). The axial dimension from the first portion (44) to the upper surface of the inner wall portion (42) is set to be longer than the axial thickness of the conductor and shorter than the axial thickness of the solder portion (16). The axial dimension from the second portion (45) to the upper surface of the inner wall portion (42) is set to be longer than the axial thickness of the solder portion (16).

Description

[Technical field]

[0001] The present invention relates to a blower housing that forms a case body of a blower having an impeller fixed to a rotating shaft of a motor, a blower wiring structure to which this blower housing is applied, and a blower to which this blower wiring structure is applied. [Background technology]

[0002] In a blower having an impeller and a motor used as a drive source for the impeller, a structure in which the motor is built into a blower housing (hereinafter also referred to as "housing") that forms a case body of the blower is known. In such a housing with a built-in motor, a structure has been proposed for accommodating in the housing a connection part between a winding wound around a stator of the motor and a lead wire for supplying power to the winding. For example, Patent Document 1 discloses a structure in which a connection part in which an end of the winding and a lead wire are soldered is placed on the upper surface of a mounting base disposed above the winding. In this structure, a partition wall is erected from the upper surface of the mounting base along the axial direction of the motor, so that the connection part can be accommodated while being electrically insulated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-245093 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a structure in which the connection part is placed on the upper surface of the mounting base as in the above-mentioned Patent Document 1, the height of the partition wall provided on the upper surface of the mounting base needs to be made larger than the outer diameter of the connection part (i.e., set to a height that ensures insulation of the connection part.) Therefore, in a housing employing such a structure, it is unavoidable that the housing becomes larger in the axial direction by the height of the partition wall. Therefore, in the conventional technology, there is room for improvement in terms of making the housing thinner (smaller) in the axial direction.

[0005] The blower housing and blower wiring structure of the present invention have been devised in view of these problems, and one of the objects of the present invention is to make the blower housing thinner (smaller) in the axial direction. Also, one of the objects of the present invention is to make the blower itself thinner (smaller) in the axial direction by making the blower housing thinner (smaller) in the axial direction. In addition to these objects, another object of the present invention is to achieve effects and advantages that cannot be obtained by conventional techniques, which are derived from the configurations shown in the below-mentioned embodiments of the invention. [Means for solving the problem]

[0006] The disclosed blower housing, blower wiring structure, and blower can be realized as the following disclosed aspects (application examples), which solve at least part of the above problems. Aspects 2 to 5 are all aspects that can be selected as appropriate and are all aspects that can be omitted. None of Aspects 2 to 5 discloses an essential aspect or configuration for the present invention.

[0007] Aspect 1. The disclosed blower housing is a case body of a blower having a motor, and includes an opening for accommodating a stator of the motor, and a housing portion formed so as to surround an outer periphery of the stator on the radially outer side of the opening, for accommodating a winding of the stator and a solder portion formed by soldering a conductor including the winding. The housing portion has a bottom surface portion forming a surface on which the conductor and the solder portion are arranged, and an inner wall portion disposed from an inner edge of the bottom surface portion in the radial direction toward a first direction in the axial direction of the stator. The bottom surface portion includes a first portion in which the conductor is arranged and a second portion in which the solder portion is arranged, the second portion being recessed to a deeper position in the second axial direction than the first portion, the axial dimension from the first portion to the upper surface of the inner wall portion being set to be longer than the axial thickness of the conductor and shorter than the axial thickness of the solder portion, and the axial dimension from the second portion to the upper surface of the inner wall portion being set to be longer than the axial thickness of the solder portion.

[0008] Aspect 2. In the above aspect 1, it is preferable that the accommodating portion has an outer wall portion arranged from the radially outer edge of the bottom portion toward the first direction, and a fixing portion formed to narrow the radial gap between the inner wall portion and the outer wall portion and to which the conductor is fixed. Aspect 3. In the above aspect 1 or 2, it is preferable that the first portion and the second portion are connected via an inclined surface in the circumferential direction of the housing portion.

[0009] Aspect 4. In the above aspect 3, it is preferable that the fixing portion and the inclined surface are disposed in positions where they at least partially overlap when viewed from the axial direction. Aspect 5. In any one of Aspects 1 to 4 above, it is preferable that the bottom surface portion includes a plurality of the second portions, and one of the solder portions is disposed for each of the second portions.

[0010] Aspect 6: The disclosed blower wiring structure includes a blower housing according to any one of aspects 1 to 5 above, and a stator accommodated in the blower housing, and the winding of the stator and a soldered portion to which a conductor including the winding is soldered are accommodated in an accommodating portion of the blower housing. Aspect 7. The disclosed blower comprises an impeller fixed to a rotating shaft of a motor and the blower wiring structure described in aspect 6 above. Effect of the Invention

[0011] According to the disclosed blower housing and blower wiring structure, the blower housing can be made thinner (smaller) in the axial direction. Also, according to the disclosed blower, since the blower housing can be made thinner (smaller) in the axial direction, the blower itself can also be made thinner (smaller) in the axial direction. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a perspective view illustrating a blower according to the embodiment. [Diagram 2] 2 is a cross-sectional view illustrating a blower housing applied to the blower of FIG. 1. [Diagram 3] 3 is an enlarged perspective view of an accommodating portion of the blower housing of FIG. 2. FIG. [Figure 4] 4 is a cross-sectional view showing the housing portion of FIG. 3 cut along a circumferential direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A blower housing, a blower wiring structure, and a blower as embodiments will be described 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 explicitly described 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, the configurations can be selected as necessary, or can be combined as appropriate.

[0014] The blower of the embodiment is a blower having a motor. More specifically, this blower has an impeller fixed to the rotating shaft of the motor, and is a blower that sends gas (e.g., air) by the rotation of the impeller. In the following description, the direction in which the rotating shaft extends (rotating shaft direction) is defined as the axial direction, and the direction perpendicular to the axial direction, away from the rotating shaft and toward the rotating shaft, is defined as the radial direction. In the radial direction, the rotating shaft side is defined as the radial inner side, and the opposite side (the side away from the rotating shaft) is defined as the radial outer side. The direction perpendicular to the axial direction and going around the rotating shaft is defined as the circumferential direction.

[0015] [1. Configuration] Fig. 1 is an external perspective 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. As shown in Figs. 1 and 2, the blower 1 of this embodiment is a fan that blows air by rotating an impeller 2 (see Fig. 2).

[0016] 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") that forms a case body that houses the impeller 2 and the motor 10. The motor 10 is an inner rotor type brushless motor, and is configured by incorporating in the housing 11 a rotor 20 that rotates integrally with a shaft 21 (rotation axis) having a rotation center X (see FIG. 2), and a stator 30 that is located radially outside the rotor 20 (hereinafter simply referred to as the "outside").

[0017] 2, the rotor 20 has a magnet 22 fixed to the shaft 21 and two balancers 23 that axially sandwich the magnet 22, and is rotatably fixed to the housing 11 and the end bells 12 by bearings 24. The stator 30 has a stator core 31 fixed to the inner circumferential surface of the housing 11, and a coil 35 wound around the stator core 31 via an insulator 32. In this embodiment, a stator 30 having six coils 35 arranged at equal intervals in the circumferential direction will be taken as an example.

[0018] Lead wire 14 for supplying power to winding 35a is connected by soldering to an end (start or end) of winding 35a forming coil 35. In addition, the end (start or end) of winding 35a on the side to which lead wire 14 is not connected is connected to the ends of winding 35a by soldering. Hereinafter, the portion where the end of winding 35a and the conductor including winding 35a are soldered is referred to as "soldered portion 16." Note that winding 35a and lead wire 14 are both elements included in the "conductor" defined in the claims.

[0019] The impeller 2 is fixed to one end of the shaft 21. The impeller 2 is an impeller for blowing air, and is configured, for example, to include a disk-shaped base portion fixed to the shaft 21 and a plurality of fins radially arranged on the disk surface of the base portion. When the motor 10 is operated to rotate the shaft 21, the impeller 2 rotates integrally with the shaft 21.

[0020] 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.

[0021] 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 following, 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," and the opposite side will be referred to as the "second direction." In addition, if the axial direction is assumed to be the up-down direction, the first direction side will be referred to as the "upper" and the second direction side will be referred to as the "lower."

[0022] The housing 11 has an opening 15 for accommodating the stator 30 of the motor 10. Specifically, the opening 15 accommodates the stator 30 from the axial direction. The opening 15 is a portion at the upper end of the cylindrical portion 11A that is surrounded by the upper edge of the side wall portion 11c, and forms an opening for disposing the rotor 20 and the stator 30 in the cylindrical portion 11A. The opening 15 has a substantially circular outline when viewed from the first direction. Note that the term "substantially circular" is not limited to a perfect circle (circle) and includes any shape that can be considered as a circle. For example, the opening 15 may be a polygonal shape that can be considered as a circle when viewed from the first direction. The opening 15 of the cylindrical portion 11A is covered by an end bell 12, as shown typically by a two-dot chain line in FIG. 2. The end bell 12 is a cover member that is combined with the housing 11. In this embodiment, outer circumferential end portion 12a of end bell 12 is placed on flange portion 11f of housing 11, and end bell 12 is fixed to housing 11.

[0023] 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. As shown in Fig. 2, 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 this lower end portion. A cover member is attached to the lower surface side of the housing 11.

[0024] In this embodiment, as shown in Fig. 2, the end bell 12 and the 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 disposed (housed) therein. The dimensions of the case body of the blower 1 are set so as to be able to house at least the impeller 2 and the motor 10.

[0025] As shown in Fig. 1, grooves 14A are formed on the upper surface of housing 11 so that each of a plurality of lead wires 14 (five in this example) can be drawn out from inside housing 11 and 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 housing 11 to the outside. In this embodiment, three of the five lead wires 14 are connected to winding 35a, and the remaining two are connected to an electronic device other than 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.

[0026] Housing 11 includes accommodating portion 40 for accommodating solder portion 16. Accommodating portion 40 is a portion formed so as to surround the outer periphery of stator 30 radially outward from opening 15. Accommodating portion 40 in this embodiment is formed around opening 15 so as to surround the outer periphery of stator 30, in other words, is formed so as to annularly surround the outer periphery of stator 30, and is provided on the upper surface side of housing 11, and accommodates solder portion 16 between housing 11 in which stator 30 is disposed and end bell 12.

[0027] The basic performance required for the accommodating portion 40 is the ability to accommodate the solder portion 16 in a predetermined position, and the insulation ability to electrically insulate the solder portion 16 from the stator 30. The accommodating portion 40 of the present embodiment is configured to enable the housing 11 to be made smaller (thinner in the axial direction) while still satisfying this basic performance.

[0028] As described above, the solder portion 16 accommodated in the accommodation portion 40 is a portion where the end of the winding 35a is soldered to the conductor. Specifically, the solder portion 16 includes two types of solder portions 16: a first solder portion 16 where the end of the winding 35a is soldered to the lead wire 14, and a second solder portion 16 where the ends of the winding 35a are soldered together (for example, the ends of the three-phase windings 35a are grouped together). In other words, the "conductor" includes the lead wire 14 connected to the end of the winding 35a, and the end of another winding 35a connected to the end of a certain winding 35a. Note that the accommodation portion 40 can accommodate multiple solder portions 16, but in the figure, only one solder portion 16 is shown, and the others are omitted.

[0029] Fig. 3 is an enlarged view of the accommodating portion 40. Fig. 4 is a cross-sectional view taken along the line BB in Fig. 3, showing the accommodating portion 40 cut along the circumferential direction. As shown in Figs. 1 to 4, the accommodating portion 40 has at least a bottom surface portion 41 forming a surface on which the conductor wire (winding wire 35a and / or lead wire 14) and the solder portion 16 are arranged, and an inner wall portion 42 arranged (for example erected) from a radially inner edge 41A (hereinafter referred to as the inner edge 41A) of the bottom surface portion 41 toward the first direction.

[0030] The bottom surface portion 41 is the bottom surface of the storage portion 40, and is annular (circular in this embodiment) when viewed from the first direction. The storage portion 40 of this embodiment further has an outer wall portion 43 located radially outward of the inner wall portion 42. The inner edge 41A can be said to be the inner edge of the bottom surface portion 41 on the opening portion 15 side. The outer wall portion 43 is disposed (e.g. erected) from a radially outer edge 41B (hereinafter referred to as the outer edge 41B) of the bottom surface portion 41 toward the first direction. The outer edge 41B can be said to be the outer edge of the bottom surface portion 41 on the opposite side to the inner edge.

[0031] In this embodiment, both the inner wall portion 42 and the outer wall portion 43 stand upward (in the first axial direction) from the upper surface side of the housing 11. Both the inner wall portion 42 and the outer wall portion 43 are annular (circular in this embodiment) when viewed from the first direction. In other words, it can be said that the bottom surface portion 41 is provided between the inner wall portion 42 and the outer wall portion 43. The radial dimension of the bottom surface portion 41 (the radial distance between the inner wall portion 42 and the outer wall portion 43) is set to a length that ensures sufficient space for arranging the conductive wires and the solder portion 16.

[0032] As shown in Figs. 1, 3 and 4, the bottom surface portion 41 includes a first portion 44 where the conductive wire is disposed, and a second portion 45 where the solder portion 16 is disposed. The first portion 44 and the second portion 45 are each a part of the bottom surface portion 41, and are located at different positions in the circumferential direction of the housing portion 40 and at different positions in the axial direction. Specifically, as shown in Figs. 3 and 4, the second portion 45 is a portion of the bottom surface portion 41 that is recessed to a deeper position (position on the second axial direction side) below the first portion 44. The first portion 44 can also be said to be a portion of the bottom surface portion 41 other than the second portion 45. The solder portion 16 is not disposed in the first portion 44.

[0033] In this embodiment, the first portion 44 and the second portion 45 are connected in the circumferential direction via an inclined surface 46. Focusing on one second portion 45, an upward inclined surface 46 is formed continuously at both ends in the circumferential direction of the second portion 45. Then, the first portion 44 is formed continuously at the end edge of each inclined surface 46 on the opposite side to the second portion 45 (i.e., the upper edge that has risen up the inclination). In other words, the first portion 44 and the second portion 45 are disposed adjacent to each other in the circumferential direction with the inclined surface 46 therebetween.

[0034] Inclined surface 46 is a portion formed in an inclined shape that smoothly connects first portion 44 and second portion 45. Inclined surface 46 is a part of bottom surface portion 41, and is a part separate from first portion 44 and second portion 45. A conductive wire or solder portion 16 may be arranged on this inclined surface 46. Note that, since the location where solder portion 16 is arranged is always second portion 45, "solder portion 16 is arranged on inclined surface 46" here means that a part of solder portion 16 arranged on second portion 45 is also arranged on inclined surface 46.

[0035] As shown in Fig. 1, the bottom surface portion 41 of the housing portion 40 has a plurality of (four in this example) second portions 45 spaced apart from one another in the circumferential direction. Although omitted in Fig. 1, one solder portion 16 is disposed on each of the second portions 45. In detail, one first solder portion 16 is disposed on each of three of the four second portions 45, and one second solder portion 16 is disposed on the remaining second portion 45.

[0036] The circumferential dimensions of the second portions 45 may all be the same, or may all or some of them may be different. For example, the first solder portion 16 and the second solder portion 16 may have different circumferential dimensions. Therefore, the circumferential dimension of the second portion 45 for arranging the first solder portion 16 may be different from the circumferential dimension of the second portion 45 for arranging the second solder portion 16. The type and number of conductors arranged in each first portion 44 are not particularly limited. For example, one or more windings 35a may be arranged, one lead wire 14, or both the winding 35a and the lead wire 14 may be arranged.

[0037] The inner wall portion 42 functions as a partition wall for mechanically isolating and electrically insulating the solder portion 16 accommodated in the second portion 45 from the stator 30 in the cylindrical portion 11A. From the viewpoint of ensuring this function as a partition wall, it is preferable to set the axial dimension (i.e., the wall height) of the inner wall portion 42 long. On the other hand, if the axial dimension of the inner wall portion 42 is too long, the axial dimension (thickness) of the housing 11 increases, so from the viewpoint of miniaturizing the housing 11 (realizing a thinner shape in the axial direction), it is preferable to suppress the axial dimension of the inner wall portion 42. Note that the axial dimension of the inner wall portion 42 is the axial length (height) from the bottom surface portion 41 to the upper surface 42A of the inner wall portion 42, as shown in FIG. 4. The upper surface 42A is an end surface located on the upper side (first direction side) of the inner wall portion 42.

[0038] From the standpoint of both ensuring the function as a partition wall and reducing the thickness, the axial dimension of the inner wall portion 42 is set so as to satisfy both the following condition 1 and condition 2. Condition 1: The axial dimension T1 from the first portion 44 to the upper surface 42A of the inner wall portion 42 is longer than the axial thickness of the conductor arranged in the first portion 44, and the axial thickness of the solder portion 16 is also shorter. Condition 2: The axial dimension T2 from the second portion 45 to the upper surface 42A of the inner wall portion 42 is longer than the axial thickness of the solder portion 16.

[0039] Condition 1 is set as a condition for suppressing dimension T1 as much as possible while ensuring a minimum dimension (i.e., ensuring accommodation) for arranging the conductor in first portion 44 while being isolated from stator 30 by inner wall portion 42. Although a state in which solder portion 16 is arranged in first portion 44 is not assumed, the axial thickness of solder portion 16 is used as a criterion for limiting dimension T1. Note that "axial thickness of solder portion 16" here refers to the length of a portion equivalent to the outer diameter when solder portion 16 is considered to have a substantially cylindrical shape. In reality, the shape of solder portion 16 is not necessarily substantially cylindrical, so "axial thickness of solder portion 16" can also be said to be the axial dimension (height) when solder portion 16 is placed on bottom surface portion 41.

[0040] As described above, one or more windings 35a, one lead wire 14, or both the winding 35a and the lead wire 14 may be arranged in the first portion 44, so that the axial thickness of the conductor may be either the outer diameter of one winding 35a or the outer diameter of one lead wire 14, or the axial thickness of the entire conductors arranged overlapping in the axial direction.

[0041] When only one winding 35a or one lead wire 14 is arranged in the first portion 44, the "axial thickness of the conductor" refers to the outer diameter of one winding 35a or one lead wire 14. When two or more windings 35a are arranged in the first portion 44, or when a winding 35a and a lead wire 14 are arranged, there is a possibility that a plurality of conductors are arranged overlapping in the axial direction. Therefore, in these cases, the "axial thickness of the conductor" refers to the axial thickness of the conductor as a whole of the plurality of conductors arranged overlapping in the axial direction.

[0042] Condition 2 is set as a condition for ensuring the minimum dimension capable of isolating the solder portion 16 from the stator 30 by the inner wall portion 42 as dimension T2 (i.e., ensuring accommodation). Since the upper limit of the axial dimension of the inner wall portion 42 is limited by the above condition 1, dimension T2 is realized by taking into consideration both the axial position of the upper surface 42A of the inner wall portion 42 and the depth to which the second portion 45 is recessed.

[0043] The "axial thickness of the solder portion 16" is as defined above. If the dimension T2 is shorter than the axial thickness of the solder portion 16, the inner wall portion 42 may not be able to isolate the solder portion 16 from the stator 30, resulting in insufficient electrical insulation. In other words, condition 2 is for ensuring sufficient electrical insulation. Note that the winding 35a and the lead wires 14 are covered with an insulating material except for the solder portion 16, and therefore electrical insulation can be ensured in the portions other than the solder portion 16 even if they are not isolated by the inner wall portion 42.

[0044] As described above, the axial thickness of the conductor differs between the outer diameter of one winding 35a or one lead wire 14 and the axial thickness of the entire conductor when multiple conductors are arranged overlapping in the axial direction. The axial thickness of the solder portion 16 may also vary. Therefore, the dimensions T1 and T2 may be appropriately set based on the assumed dimensions of the axial thickness of the conductor and the axial thickness of the solder portion 16 so as to satisfy both the above conditions 1 and 2. As an example, the dimensions T1 and T2 may be set based on the assumed maximum dimensions of the axial thickness of the conductor and the axial thickness of the solder portion 16.

[0045] As shown in FIGS. 1 to 4, the inner wall 42 is provided with a plurality of cutouts 42B formed by cutting out the upper end side. The cutouts 42B are portions where the axial dimension of the inner wall 42 is intentionally shortened (the height is reduced) in order to facilitate drawing out the winding 35a from the radially inner side to the outside of the inner wall 42. In this embodiment, the plurality of cutouts 42B are provided at intervals in the circumferential direction of the accommodating section 40. It is preferable that the circumferential position of each cutout 42B is set to a position corresponding to the first portion 44 (a position that is partially or entirely the same as the circumferential position of the first portion 44). Note that since the solder portion 16 is not disposed in the first portion 44, electrical insulation is maintained even if the axial dimension of the inner wall 42 is shortened by the cutouts 42B.

[0046] 1 to 3, accommodating portion 40 has a fixing portion (here, press-fit portion 47) to which the conductor wire arranged in accommodating portion 40 is fixed (e.g., press-fitted). Of the conductor wires and solder portion 16 arranged on bottom surface portion 41, the conductor wires arranged in press-fit portion 47 are fixed to accommodating portion 40. In other words, the conductor wires and solder portion 16 located in portions of accommodating portion 40 other than press-fit portion 47 are not fixed (are simply placed and free).

[0047] The press-fit portion 47 is formed so as to narrow the radial gap between the inner wall portion 42 and the outer wall portion 43. In this embodiment, the press-fit portion 47 is provided as a portion that protrudes inward from the radially inward surface of the outer wall portion 43. The radial gap between the inner wall portion 42 and the outer wall portion 43 is narrowed by the dimension by which the press-fit portion 47 protrudes inward from the outer wall portion 43. The dimension by which the press-fit portion 47 protrudes inward from the outer wall portion 43 is set to an appropriate dimension that allows the conductor wire to be press-fitted.

[0048] Since the press-fit portion 47 is a portion into which the conductor wire is press-fitted, it is formed at a position overlapping with the first portion 44 as viewed from the first direction. As shown in Fig. 3, in the housing 11 of this embodiment, it is preferable that the inclined surface 46 and the press-fit portion 47 are arranged at positions where they at least partially overlap as viewed from the axial direction. For example, in the inclined surface 46 and the press-fit portion 47 of Fig. 3, the ends 46A, 47A opposite to the end close to the second portion 45 in the circumferential direction are arranged at the same position in the circumferential direction.

[0049] 1 to 4. 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 winding 35a and the conductor are soldered. Then, the solder portion 16 and the conductor are placed in the receiving portion 40, and the conductor placed in the press-fit portion 47 is press-fitted. After that, the end bell 12 is combined with the housing 11 to cover the opening 15.

[0050] Finally, the blower wiring structure will be described. The blower wiring structure is a wiring structure provided in the blower 1, and specifically includes the above-mentioned housing 11 and the stator 30 housed in the housing 11. This blower wiring structure refers to the structure itself in which the winding 35a of the stator 30 and the solder part 16 to which the above-mentioned conductor is soldered are housed in the housing part 40 of the housing 11 described above. The blower 1 of the present embodiment includes this blower wiring structure and the impeller 2 fixed to the shaft 21 (rotating shaft) of the motor 10.

[0051] [2. Effects] (1) In the above-described housing 11, the housing portion 40 is provided radially outside the opening 15 for housing the stator 30 of the motor 10, so as to surround the outer periphery of the stator 30. In the housing portion 40, the second portion 45 of the bottom surface portion 41 where the solder portion 16 is arranged is recessed to a position lower and deeper than the first portion 44 where the conductor (winding 35a and / or lead wire 14) is arranged. This makes it possible to reduce the axial dimension of the inner wall portion 42 compared to a conventional structure in which the conductor and the solder portion 16 are housed at the same axial position. Therefore, the housing 11 can be made thinner (smaller) in the axial direction while satisfying the basic performance of the housing ability to house the solder portion 16 at a predetermined position and the insulation ability to electrically insulate the solder portion 16 from the stator 30.

[0052] (2) The accommodating portion 40 in the housing 11 described above may have a fixing portion (here, press-fit portion 47) formed to narrow the radial distance between the inner wall portion 42 and the outer wall portion 43 and to which the conductor is fixed. In this case, the conductor arranged in the fixing portion can be fixed, so that the retention of the solder portion 16 in the state of being accommodated in the accommodating portion 40 can be improved.

[0053] (3) In addition, in the accommodating portion 40 of the housing 11 described above, the first portion 44 and the second portion 45 of the bottom surface portion 41 may be connected via an inclined surface 46 in the circumferential direction of the accommodating portion 40. The inclined surface 46 allows the conductor wire to be oriented obliquely downward from the first portion 44 toward the second portion 45, making it easier to guide the conductor wire and the solder portion 16 toward the second portion 45. This makes it easier to arrange the solder portion 16 in the second portion 45. The accommodation portion 40 may be formed by integral molding with resin so that the thickness in the axial direction of the inclined surface 46 gradually increases from one side to the other in the circumferential direction of the inclined surface 46. This allows a greater thickness to be ensured compared to a case in which the first portion 44 and the second portion 45 are connected in a stepped manner without the inclined surface 46, thereby improving the rigidity of the housing 11.

[0054] (4) Furthermore, in the above-described housing 11, the press-fit portion 47 and the inclined surface 46 may be disposed in a position where they at least partially overlap when viewed from the axial direction. By disposing the press-fit portion 47 and the inclined surface 46 in a position where they at least partially overlap when viewed from the axial direction, when the conductor is press-fitted by the press-fit portion 47, the state where the conductor is disposed along the inclined surface 46 is easily maintained (the conductor is less likely to float up). This makes it easier to guide the conductor and the solder portion 16 toward the second portion 45, and makes it easier to stably dispose the solder portion 16 in the second portion 45.

[0055] (5) In addition, in the above-described housing 11, bottom surface portion 41 may include a plurality of second portions 45, and one solder portion 16 may be disposed for each second portion 45. This allows the plurality of solder portions 16 to be disposed individually in second portion 45, making it easier to ensure accommodation and insulation.

[0056] (6) A blower wiring structure including the above-mentioned housing 11 and the stator 30 housed in the housing 11, with the conductor (winding 35a and / or lead wire 14) and the solder portion 16 housed in the housing portion 40 of the housing 11, can provide at least the same effects as those described above for the housing 11 in (1). Also, a blower wiring structure including the housing 11 having the configurations described above in (2) to (5) can provide the same effects as those described above in (2) to (5).

[0057] (7) Furthermore, according to the blower wiring structure including the housing 11 described above and the blower 1 including the impeller 2 fixed to the shaft 21 of the motor 10, at least the same effect as that described for the housing 11 in (1) above can be obtained. That is, since the housing 11 can be made thinner (smaller) in the axial direction, the blower 1 itself can also be made thinner (smaller) in the axial direction. In addition, by providing the blower 1 with a blower wiring structure including the housing 11 having the configuration described in (2) to (5) above, the same effect as that described in (2) to (5) above can also be obtained.

[0058] [3.Other] The above-described housing 11, blower wiring structure, and blower 1 are merely examples, and are not limited to the above-described configurations. For example, the accommodating portion 40 may have a structure that does not include the outer wall portion 43 and the press-fit portion 47. In this case, too, the axial dimension of the inner wall portion 42 may be shortened to obtain the effect of making the housing 11 thinner (smaller) in the axial direction. Also, the bottom surface portion 41 may not include the inclined surface 46, that is, the first portion 44 and the second portion 45 may be disposed adjacent to each other without the inclined surface 46 therebetween.

[0059] Also, end 47A of press-fit portion 47 and end 46A of inclined surface 46 may be set at different positions in the circumferential direction. In this case as well, by fixing the conductor arranged in press-fit portion 47, the retention of solder portion 16 can be improved, and since the conductor can be oriented by inclined surface 46, the conductor and solder portion 16 can be easily guided toward second portion 45. Furthermore, the bottom surface portion 41 may include only one second portion 45. In this case, a plurality of solder portions 16 may be disposed in one second portion 45.

[0060] Furthermore, the type of motor is not limited to an inner rotor brushless motor, but may be an outer rotor motor, or may be a brushed motor if lead wires are used. The application of housing 11 having accommodating portion 40 described above is not limited to blowers, but can be applied to any device that requires the housing to be thin (small) in the axial direction. An example of an object other than a blower to which a housing having a receiving portion can be applied is a plastic gear box. [Explanation of symbols]

[0061] 1 Blower 2 Impeller 10 Motor 11 Housing (Blower housing) 14 Lead wire (conductor) 15 Opening 16 Soldering part 21 Shaft 30 Stator 35 Coil 35a winding 40 Storage unit 41 Bottom part 41A Inner edge (inner edge) 41B Outer edge (outer edge) 42 Inner wall 42A Top 43 Outer wall 44 Part 1 45 Second part 46 Slope 47 Press-fit part (fixed part)

Claims

1. A blower housing that forms a case body of a blower having a motor, an opening for receiving a stator of the motor; a housing portion formed radially outside the opening so as to surround an outer periphery of the stator, for housing a winding of the stator and a solder portion to which a conductor including the winding is soldered; The accommodating portion has a bottom surface portion that forms a surface on which the conducting wire and the solder portion are arranged, and an inner wall portion that is arranged from an inner edge of the bottom surface portion in the radial direction toward a first direction in the axial direction of the stator, the bottom surface portion includes a first portion on which the conductive wire is disposed and a second portion on which the solder portion is disposed; The second portion is recessed to a deeper position in the second axial direction than the first portion, a dimension in the axial direction from the first portion to an upper surface of the inner wall portion is set to be longer than a thickness of the conducting wire in the axial direction and shorter than a thickness of the solder portion in the axial direction; The dimension in the axial direction from the second portion to the upper surface of the inner wall portion is set to be longer than the thickness in the axial direction of the solder portion. A blower housing comprising:

2. The housing portion has an outer wall portion disposed from an outer edge of the bottom surface portion in the radial direction toward the first direction, and a fixing portion formed to narrow the radial gap between the inner wall portion and the outer wall portion and to which the conductive wire is fixed.

2. The blower housing of claim 1 .

3. The first portion and the second portion are connected to each other via an inclined surface in the circumferential direction of the housing portion.

3. The blower housing according to claim 2 .

4. The fixing portion and the inclined surface are disposed at a position where they at least partially overlap when viewed in the axial direction.

4. The blower housing according to claim 3, characterized in that:

5. The bottom surface portion includes a plurality of the second portions, The solder portions are disposed one by one on each of the second portions.

2. The blower housing of claim 1 .

6. A blower housing according to any one of claims 1 to 5; a stator housed in the blower housing; The winding of the stator and a soldered portion where the conductor including the winding is soldered are accommodated in the accommodation portion of the blower housing. A blower wiring structure comprising:

7. An impeller fixed to a rotating shaft of the motor; The blower wiring structure according to claim 6, A blower characterized by: