Motor

Abstract

To provide a motor capable of avoiding a natural frequency of the motor from a resonant frequency of an attachment target object, and also preventing a shaft from falling.SOLUTION: A motor (10) has a stator (12) configured in an annular shape, a shaft (20) disposed inside the stator, a center piece (16) that supports the stator and the shaft, a substrate (24) fixed to the center piece, a case (22) having a storage unit (48) that stores the substrate and a flange (50) that extends around the storage unit, and fixed to the center piece by a first fixing unit (60), and a motor holder (28) fixed to the case by a second fixing unit (62). The case has a rib (100) that connects the side of the storage unit and the flange, and the rib has a notch (106) formed therein.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a motor. [Background technology]

[0002] Patent Document 1 discloses a blower motor. The blower motor includes a yoke housing formed in a cylindrical shape with a bottom, and an end frame formed in a disk shape that closes the opening of the yoke housing. The yoke housing and the end frame form a motor case. The yoke housing and the end frame are each provided with a bearing, and each bearing rotatably supports a rotor shaft. Magnets are fixed to the inner surface of the yoke housing, and are arranged to face each other with the rotor in between. The blower motor is held by floatingly supporting the yoke housing of the motor case on a motor holder. The motor holder is attached to the vehicle body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-309601 A Summary of the Invention [Problem to be solved by the invention]

[0004] For a motor that has a shaft and is attached to an object via a motor holder, it may be necessary to avoid the motor's natural frequency being different from the resonant frequency of the object and to prevent the shaft from tipping over.

[0005] An object of the present disclosure is to provide a motor that can avoid the natural frequency of the motor from being affected by the resonant frequency of an object to which the motor is attached, and that can also suppress shaft tilt. [Means for solving the problem]

[0006] One aspect of the present disclosure is a motor (10) having a stator (12) configured in an annular shape, a shaft (20) arranged inside the stator, a center piece (16) supporting the stator and the shaft, a substrate (24) fixed to the center piece, a storage section (48) for accommodating the substrate, and a flange (50) extending around the storage section, the case (22) fixed to the center piece by a first fixing portion (60), and a motor holder (28) fixed to the case by a second fixing portion (62), the case having a rib (100) connecting a side of the storage section and the flange, and the rib having a notch (106) formed therein. Effect of the Invention

[0007] According to the present disclosure, a motor is provided that can avoid the natural frequency of the motor from being mutually exclusive with the resonant frequency of the object to which the motor is attached, and can also suppress tilting of the shaft. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view of a motor according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] This is a perspective view of the case as seen from the back side. [Diagram 5] FIG. 4 is a rear view of the motor holder as seen from the back side. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] 4 is an enlarged view of the periphery of a first rib in the case. FIG. [Figure 9] 4 is an enlarged view of the periphery of a second rib in the case. FIG. [Figure 10] FIG. 4 is an enlarged view of the periphery of a first rib in the motor. [Figure 11]FIG. 4 is an enlarged view of the periphery of a second rib in the motor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, one embodiment of the present disclosure will be described.

[0010] 1 to 3, the motor 10 includes a stator 12, a rotor 14, a center piece 16, a pair of ball bearings 18, a shaft 20, a case 22, a substrate 24, a connector member 26, a motor holder 28, and an elastic member 30. The motor 10 is, for example, an outer rotor type brushless motor. The motor 10 is, for example, a fan motor applied to an air conditioning system (HVAC: Heating Ventilation and Air-Conditioning) of a vehicle.

[0011] The arrow A side indicates one axial side of the motor 10, and the arrow B side indicates the other axial side of the motor 10. The axial direction of the motor 10 coincides with the axial directions of the components arranged coaxially with the shaft 20. The motor 10 is attached to, for example, an air conditioner so that the axial direction of the motor 10 is along the horizontal direction. An air conditioner is an example of an object to be attached to. The arrow CD direction indicates the vertical direction when the motor 10 is attached to the air conditioner. For example, the arrow C side indicates the vertical downward side, and the arrow D side indicates the vertical upward side. The arrow AB direction, the arrow CD direction, and the arrow EF direction are perpendicular to each other.

[0012] The stator 12 is formed in an annular shape and includes a stator core 32, an insulator 34, and a winding 36. The winding 36 is wound around the stator core 32 with the insulator 34 interposed therebetween.

[0013] The rotor 14 has a rotor housing 38 and a rotor magnet 40. The rotor housing 38 is formed in a cylindrical shape with a top. The rotor magnet 40 is fixed to the inner circumferential surface of the rotor housing 38. The stator 12 is disposed inside the rotor housing 38. The rotor magnet 40 is disposed radially outside the stator 12 and faces the stator 12.

[0014] The center piece 16 has a plate-shaped portion 42 and an axial core portion 44. The plate-shaped portion 42 is formed in a plate shape and is disposed such that the axial direction of the motor 10 is the plate thickness direction. The axial core portion 44 protrudes from the plate-shaped portion 42 to the side of the arrow A. The axial core portion 44 is disposed coaxially with the central axis of the motor 10. The plate-shaped portion 42 and the axial core portion 44 may be formed integrally or separately. The axial core portion 44 is press-fitted into the inside of the stator core 32, so that the stator 12 is supported by the axial core portion 44. A through hole 44A is formed in the center of the axial core portion 44, penetrating in the axial direction of the motor 10. In addition, recesses 44B are formed at the end portion on the arrow A side and the end portion on the arrow B side of the axial core portion 44.

[0015] Each ball bearing 18 is accommodated in the recess 44B. The shaft 20 is formed in a rod shape. The shaft 20 extends along the axial direction of the motor 10 and is disposed on the central axis of the motor 10. The shaft 20 is disposed inside the stator 12 by being inserted into the through hole 44A. The shaft 20 is press-fitted into the inside of each ball bearing 18, and is thereby rotatably supported by the center piece 16 via each ball bearing 18. A rotor housing 38 is fixed to the shaft 20 so as to be rotatable together with the shaft 20. An end of the shaft 20 on the side of the arrow A is formed as a fixing portion 20A for fixing a rotating member such as a fan. The fixing portion 20A protrudes from the rotor housing 38 to the side of the arrow A.

[0016] The case 22 is disposed on the side of the plate-shaped portion 42 indicated by the arrow B. The case 22 has a cylindrical portion 46, a housing portion 48, and a flange 50. The cylindrical portion 46 is provided on the central axis of the motor 10. The cylindrical portion 46 is formed in a shape in which a portion of the case 22 extends cylindrically in the direction of the arrow A. The portion of the shaft 20 indicated by the arrow B is inserted into the inside of the cylindrical portion 46.

[0017] The accommodation portion 48 is formed around the tubular portion 46. The accommodation portion 48 is formed in a shape that bulges out in the direction of arrow B relative to the plate-shaped portion 42. The accommodation portion 48 covers the plate-shaped portion 42 from the side of the plate-shaped portion 42 indicated by arrow B. A space for accommodating the substrate 24, which will be described later, is formed between the plate-shaped portion 42 and the accommodation portion 48. The entire case 22 including the accommodation portion 48 is formed of resin.

[0018] The flange 50 is formed around the housing portion 48. The flange 50 expands from the outer periphery of the housing portion 48 toward the outer periphery of the case 22. The flange 50 is disposed on the side of the arrow B of the plate-shaped portion 42, and faces the plate-shaped portion 42 in the axial direction of the motor 10.

[0019] The substrate 24 is formed in a plate shape and is disposed with the axial direction of the motor 10 as the plate thickness direction. The substrate 24 is fixed to the plate-shaped portion 42 with screws or the like, and is thereby provided on the plate-shaped portion 42. Electronic components and the like for supplying current to the windings 36 are mounted on the substrate 24. The portion of the shaft 20 on the arrow B side penetrates the substrate 24 and the above-mentioned plate-shaped portion 42. The connector member 26 has a plurality of connection terminals (not shown). Each connection terminal is connected to the substrate 24.

[0020] The motor holder 28 has a first annular portion 52, a second annular portion 54, and a plurality of mounting portions 56. The first annular portion 52 is located on the side of the arrow A from the plate-shaped portion 42, and surrounds the rotor 14. The second annular portion 54 is located on the side of the arrow B from the first annular portion 52, and surrounds the plate-shaped portion 42. The second annular portion 54 faces the flange 50 in the axial direction of the motor 10. The plurality of mounting portions 56 are formed on the outer periphery of the motor holder 28. The plurality of mounting portions 56 are attached to the air conditioning device, thereby fixing the motor 10 to the air conditioning device.

[0021] The motor holder 28 is formed with an intake portion 58 that extends radially outward of the motor 10. The intake portion 58 has an intake port 58A and an intake passage 58B for taking in cooling air. The intake port 58A opens toward the side indicated by arrow A, and the intake passage 58B extends radially of the motor 10 and communicates with the intake port 58A and the inside of the rotor housing 38. The cooling air taken in from the intake port 58A is supplied to the inside of the rotor housing 38 through the intake passage 58B, whereby the stator 12 is cooled by the cooling air.

[0022] As shown in FIG. 3, the case 22 is fixed to the center piece 16 by a plurality of first fixing portions 60, and the motor holder 28 is fixed to the case 22 by a plurality of second fixing portions 62.

[0023] The first fixing portion 60 is composed of an extending portion 64 (see FIG. 4) extending from the flange 50 of the case 22 in the direction of the arrow A, and a protruding portion 66 (see FIG. 3) protruding in the radial direction of the motor 10 from the outer periphery of the plate-shaped portion 42. A groove 64A is formed in the extending portion 64. Then, as will be described later, with the first seal portion 74 interposed between the plate-shaped portion 42 and the flange 50 (see FIGS. 10 and 11), the protruding portion 66 engages with the edge portion of the groove 64A on the arrow A side, thereby fixing the case 22 to the center piece 16.

[0024] The second fixing portion 62 is composed of a locking hole 68 (see FIG. 4) formed in the outer periphery of the case 22 and a locking portion 70 (see FIGS. 3 and 5) formed in the second annular portion 54 of the motor holder 28. The locking hole 68 is formed by a through hole that penetrates the motor 10 in the radial direction. The locking portion 70 is formed by a claw portion that protrudes radially outward from the second annular portion 54. As will be described later, with the second seal portion 76 interposed between the second annular portion 54 and the flange 50 (see FIGS. 10 and 11), the locking portion 70 is locked to the edge portion of the locking hole 68 on the arrow B side, thereby fixing the motor holder 28 to the case 22.

[0025] As shown in Figs. 4, 6 and 7, the elastic member 30 integrally includes a base portion 72, a first seal portion 74, a second seal portion 76, a flange vibration-proof portion 78, and rib vibration-proof portions 122, 124. The flange vibration-proof portion 78 is an example of the "vibration-proof portion" in this disclosure. The elastic member 30 may be formed of, for example, rubber or elastomer. The elastic member 30 may be molded integrally with the case 22 or may be molded separately.

[0026] The base portion 72, the first seal portion 74, and the second seal portion 76 are formed in an annular shape and extend in the circumferential direction of the case 22 (see FIG. 4). The base portion 72 is formed in a plate shape with the plate thickness direction being the axial direction of the case 22, and is provided on the surface of the flange 50 on the arrow A side. The first seal portion 74 and the second seal portion 76 are formed as protrusions protruding from the base portion 72 to the arrow A side. The first seal portion 74 is disposed radially inward of the case 22 with respect to the second seal portion 76 and the multiple first fixing portions 60. The second seal portion 76 is disposed radially outward of the case 22 with respect to the multiple first fixing portions 60.

[0027] The first seal portion 74 is interposed between the plate-shaped portion 42 and the flange 50 in an elastically compressed state when the case 22 is fixed to the center piece 16 by the multiple first fixing portions 60, thereby sealing the gap between the plate-shaped portion 42 and the flange 50 (see FIGS. 10 and 11). The gap between the plate-shaped portion 42 and the flange 50 is sealed by the first seal portion 74, thereby ensuring waterproof performance that prevents water from entering the inside of the case 22.

[0028] The second seal portion 76 is interposed between the second annular portion 54 and the flange 50 in an elastically compressed state when the motor holder 28 is fixed to the case 22 by the multiple second fixing portions 62, thereby sealing the gap between the second annular portion 54 and the flange 50 (see FIGS. 10 and 11). The gap between the second annular portion 54 and the flange 50 is sealed by the second seal portion 76, thereby ensuring a leak-proof performance that prevents a portion of the cooling air supplied to the inside of the rotor housing 38 through the intake passage 58B from leaking between the motor holder 28 and the case 22.

[0029] The flange vibration-proofing portion 78 is provided on the flange 50, which is a vibration transmission path that connects the first fixed portion 60 and the second fixed portion 62. Providing the flange vibration-proofing portion 78 on the flange 50 ensures vibration-proofing performance that prevents vibrations of the stator 12 from being transmitted to the motor holder 28 through the flange 50. In addition, the motor holder 28 described above is not directly supported by the center piece 16, but is indirectly supported by the center piece 16 via the case 22 and the elastic member 30. In other words, the motor holder 28 is in a floating state relative to the center piece 16 due to the floating structure.

[0030] The flange vibration-proofing portion 78 extends in the circumferential direction of the case 22 (see FIG. 7). The flange vibration-proofing portion 78 also extends from the base portion 72 to the side of the arrow B (see FIGS. 10 and 11). A slit 80 having the same shape as the flange vibration-proofing portion 78 is formed in the flange 50, and the slit 80 penetrates the case 22 in the axial direction. The flange vibration-proofing portion 78 is accommodated in the slit 80. By being accommodated in the slit 80, the flange vibration-proofing portion 78 is formed as a penetration portion that penetrates the case 22 (specifically, the flange 50) in its entirety in the axial direction of the case 22. Note that a portion of the flange vibration-proofing portion 78 does not have to penetrate the case 22.

[0031] More specifically, the flange vibration-isolating portion 78 has a first vibration-isolating portion 88 and a second vibration-isolating portion 90. The first vibration-isolating portion 88 and the second vibration-isolating portion 90 both extend in the circumferential direction of the case 22. The first vibration-isolating portion 88 and the second vibration-isolating portion 90 are independent of each other.

[0032] The case 22 has a plurality of first ribs 100 and a plurality of second ribs 102. The first rib 100 is an example of a "rib" in the present disclosure. The plurality of first ribs 100 and the plurality of second ribs 102 are both formed on the surface of the flange 50 on the arrow A side. The first rib 100 and the second rib 102 are both formed with the direction of the arrow AB as the height direction, and extend from the surface of the flange 50 on the arrow B side to the arrow B side. The plurality of first ribs 100 and the plurality of second ribs 102 both connect the side surface 48A of the storage portion 48 and the flange 50.

[0033] The first rib 100 extends in the direction of the arrow CD, and the second rib 102 extends in the direction of the arrow EF. That is, when the motor 10 is attached to the air conditioner, the first rib 100 extends in the vertical direction, and the second rib 102 extends in the horizontal direction. As an example, a pair of first ribs 100 is formed on the side of the arrow C relative to the storage section 48, and a pair of first ribs 100 is also formed on the side of the arrow D relative to the storage section 48. In addition, a pair of second ribs 102 is formed on the side of the arrow E relative to the storage section 48, and a pair of second ribs 102 is also formed on the side of the arrow F relative to the storage section 48.

[0034] An outer wall portion 104 is formed on the flange 50, facing the side surface 48A of the accommodation portion 48. The outer wall portion 104 extends along the outer periphery of the flange 50. The outer wall portion 104 is formed on the surface of the flange 50 on the arrow B side. The outer wall portion 104 is formed with the axial direction of the motor 10 as its height direction, and extends from the surface of the flange 50 on the arrow B side to the arrow B side. The multiple first ribs 100 and the multiple second ribs 102 connect the side surface 48A of the accommodation portion 48 and the outer wall portion 104.

[0035] As shown in FIG. 8, the first rib 100 has a first notch 106 formed therein. The first notch 106 penetrates the first rib 100 in the plate thickness direction. The first notch 106 is an example of a "notch" in the present disclosure. The first notch 106 extends in the direction of the arrow AB, which is the height direction of the first rib 100. The end of the first notch 106 on the arrow A side (i.e., the lower end 106A) reaches the end of the first rib 100 on the arrow A side (i.e., the lower end 100A). The lower end 106A of the first notch 106 is connected to the slit 80. The lower end 106A of the first notch 106 is an example of a "one end of a notch" in the present disclosure, and the lower end 100A of the first rib 100 is an example of a "lower end in the height direction of the rib" in the present disclosure.

[0036] On the other hand, the end of the first cutout 106 on the arrow B side (i.e., the upper end 106B) terminates closer to the lower end 100A side than the end of the first rib 100 on the arrow B side (i.e., the upper end 100B). As a result, a connection portion 112 is formed between the upper end 100B of the first rib 100 and the upper end 106B of the first cutout 106. The connection portion 112 connects the inner portion 108 located inside the first cutout 106 of the first rib 100 (i.e., the storage portion 48 side) and the outer portion 110 located outside the first cutout 106 of the first rib 100 (i.e., the outer wall portion 104 side). The upper end 106B of the first cutout 106 is an example of the "other end of the cutout" in the present disclosure, and the upper end 100B of the first rib 100 is an example of the "upper end of the rib in the height direction" in the present disclosure.

[0037] A rib vibration-proofing portion 122 is housed in the first cutout 106. The rib vibration-proofing portion 122 has the same shape as the first cutout 106. By being housed in the first cutout 106, the rib vibration-proofing portion 122 is formed as a penetrating portion that penetrates the first rib 100 in the thickness direction of the first rib 100 in its entirety. The rib vibration-proofing portion 122 is connected to the first vibration-proofing portion 88 (see FIG. 7) of the flange vibration-proofing portion 78.

[0038] 9, the second rib 102 is formed with a second notch 114. The second notch 114 penetrates the second rib 102 in the plate thickness direction. The second notch 114 extends in the direction of the arrow AB, which is the height direction of the second rib 102. The end of the second notch 114 on the arrow A side (i.e., the lower end 114A) reaches the end of the second rib 102 on the arrow A side (i.e., the lower end 102A). The lower end 114A of the second notch 114 is connected to the slit 80.

[0039] On the other hand, the end of the second cutout 114 on the arrow B side (i.e., the upper end 114B) terminates closer to the lower end 102A side than the end of the second rib 102 on the arrow B side (i.e., the upper end 102B). As a result, a connection portion 120 is formed between the upper end 102B of the second rib 102 and the upper end 114B of the second cutout 114. The connection portion 120 connects an inner portion 116 located on the inner side of the second cutout 114 of the second rib 102 (i.e., on the storage portion 48 side) to an outer portion 118 located on the outer side of the second cutout 114 of the second rib 102 (i.e., on the outer wall portion 104 side).

[0040] A rib vibration-proofing portion 124 is housed in the second cutout 114. The rib vibration-proofing portion 124 has the same shape as the second cutout 114. By being housed in the second cutout 114, the rib vibration-proofing portion 124 is formed as a penetrating portion that penetrates the second rib 102 in the thickness direction of the second rib 102 in its entirety. The rib vibration-proofing portion 124 is connected to the first vibration-proofing portion 88 (see FIG. 7) of the flange vibration-proofing portion 78.

[0041] It should be noted that the shape of the elastic member 30 described above is merely one example, and various modifications are possible.

[0042] Next, the effects of this embodiment will be described.

[0043] As described above in detail, the motor 10 according to this embodiment includes the stator 12 configured in an annular shape, the shaft 20 arranged inside the stator 12, the center piece 16 supporting the stator 12 and the shaft 20, the substrate 24 fixed to the center piece 16, the case 22 fixed to the center piece 16 by the first fixing portion 60, and the motor holder 28 fixed to the case 22 by the second fixing portion 62. The case 22 has an accommodation portion 48 for accommodating the substrate 24, a flange 50 extending around the accommodation portion 48, and a first rib 100 connecting the side surface 48A of the accommodation portion 48 and the flange 50. Therefore, the rigidity of the case 22 can be increased by the first rib 100, and therefore the rigidity of the center piece 16 to which the case 22 is fixed can also be increased. This makes it possible to suppress the collapse of the shaft 20 supported by the center piece 16.

[0044] Furthermore, a first notch 106 is formed in the first rib 100. Therefore, the spring constant of the case 22 can be reduced by the first notch 106, thereby reducing the natural frequency of the motor 10. This makes it possible to avoid the natural frequency of the motor 10 being at the resonant frequency of the air conditioner, thereby suppressing the generation of noise due to resonance of the air conditioner.

[0045] Moreover, the first notch 106 extends in the height direction of the first rib 100, with the lower end 106A of the first notch 106 reaching the lower end 100A of the first rib 100, and the upper end 106B of the first notch 106 terminating on the lower end 100A side of the upper end 100B of the first rib 100. As a result, a connection portion 112 that connects the inner portion 108 and the outer portion 110 of the first rib 100 is formed between the upper end 100B of the first rib 100 and the upper end 106B of the first notch 106, thereby increasing the rigidity of the first rib 100 and the rigidity of the case 22.

[0046] Furthermore, a slit 80 is formed in the flange 50, and the first notch 106 is connected to the slit 80. Therefore, for example, when the case 22 is manufactured by injection molding, the first notch 106 can be easily formed in the first rib 100.

[0047] Further, the first cutout 106 is provided with a rib vibration-proof portion 122 of the elastic member 30. Therefore, the rib vibration-proof portion 122 can suppress the transmission of vibration of the motor 10 (particularly, vibration of the stator 12) to the vehicle body via the center piece 16, the case 22, and the motor holder 28.

[0048] Furthermore, a flange vibration-isolating portion 78 (specifically, a first vibration-isolating portion 88) of the elastic member 30 is provided in the slit 80 formed in the flange 50. Therefore, the flange vibration-isolating portion 78 can suppress the transmission of vibrations of the motor 10 (particularly, vibrations of the stator 12) to the vehicle body via the center piece 16, the case 22, and the motor holder 28.

[0049] Additionally, the flange 50 is formed with an outer wall portion 104 that faces the side surface 48A of the housing portion 48, and the first rib 100 is connected to the side surface 48A of the housing portion 48 and the outer wall portion 104. This makes it possible to further increase the rigidity of the case 22 and, in turn, the rigidity of the center piece 16, so that the shaft 20 supported by the center piece 16 can be more effectively prevented from falling.

[0050] Furthermore, the first rib 100 extends in the vertical direction when the motor 10 is attached to the vehicle body, which makes it possible to prevent the shaft 20 from falling in the vertical direction due to the weight of the rotor 14 and the like.

[0051] Furthermore, in addition to the first rib 100, the case 22 has a second rib 102 that connects the side surface 48A of the housing portion 48 and the flange 50. Therefore, the second rib 102 can further increase the rigidity of the case 22, and therefore the rigidity of the center piece 16 to which the case 22 is fixed, so that the shaft 20 supported by the center piece 16 can be more effectively prevented from falling.

[0052] Further, the second rib 102 is formed with a second notch 114. Therefore, by lowering the spring constant of the case 22 with the second notch 114, it is possible to lower the natural frequency of the motor 10. This makes it possible to avoid the natural frequency of the motor 10 from the resonant frequency of the air conditioner, thereby suppressing the generation of noise due to resonance of the air conditioner.

[0053] Further, the second notch 114 extends in the height direction of the second rib 102, with the lower end 114A of the second notch 114 reaching the lower end 102A of the second rib 102, and the upper end 114B of the second notch 114 terminating closer to the lower end 102A than the upper end 102B of the second rib 102. As a result, a connection portion 120 that connects the inner portion 116 and the outer portion 118 of the second rib 102 is formed between the upper end 102B of the second rib 102 and the upper end 114B of the second notch 114, thereby increasing the rigidity of the second rib 102 and, in turn, the rigidity of the case 22.

[0054] Moreover, the second cutout 114 is connected to the slit 80. Therefore, for example, when the case 22 is manufactured by injection molding, the second cutout 114 can be easily formed in the second rib 102.

[0055] Further, the second cutout 114 is provided with a rib vibration-proof portion 124 of the elastic member 30. Therefore, the rib vibration-proof portion 124 can suppress the transmission of vibration of the motor 10 (particularly, vibration of the stator 12) to the vehicle body via the center piece 16, the case 22, and the motor holder 28.

[0056] In addition, the second rib 102 is connected to the side surface 48A of the housing portion 48 and the outer wall portion 104. This makes it possible to further increase the rigidity of the case 22 and, in turn, the rigidity of the center piece 16, so that the shaft 20 supported by the center piece 16 can be more effectively prevented from falling.

[0057] Furthermore, the second rib 102 extends horizontally when the motor is attached to the vehicle body, thereby making it possible to prevent the shaft 20 supported by the center piece 16 from falling in the horizontal direction.

[0058] The elastic member 30 also integrally includes a first seal portion 74 that seals between the center piece 16 and the case 22, a second seal portion 76 that seals between the case 22 and the motor holder 28, and a flange vibration-proof portion 78 that is provided on the flange 50, which is a vibration transmission path that connects the first fixed portion 60 and the second fixed portion 62. Therefore, the first seal portion 74 can prevent water from entering the inside of the case 22, the second seal portion 76 can prevent the cooling air taken in from the motor holder 28 from leaking, and the flange vibration-proof portion 78 can prevent the vibration of the stator 12 from being transmitted to the motor holder 28 through the flange 50. Moreover, an increase in the number of parts can be suppressed compared to when the first seal portion 74, the second seal portion 76, and the flange vibration-proof portion 78 are configured separately.

[0059] Furthermore, the flange vibration-proof portion 78 is formed as a through-portion that passes through the case 22 in the axial direction of the case 22. Therefore, vibrations can be absorbed along the entire axial direction of the case 22.

[0060] In addition, the motor holder 28 is not directly supported by the center piece 16, but is supported by the center piece 16 via the case 22 and the elastic member 30. Therefore, it is possible to prevent vibrations of the stator 12 from being directly transmitted from the center piece 16 to the motor holder 28.

[0061] Next, a modification of this embodiment will be described.

[0062] In the above embodiment, the motor 10 is attached to an air conditioning system of a vehicle, but the motor 10 may be attached to an object other than an air conditioning system of a vehicle. Also, the motor 10 may be used for purposes other than as a fan motor.

[0063] Furthermore, in the above embodiment, the case 22 has the first rib 100 and the second rib 102, but the second rib 102 may be omitted.

[0064] In the above embodiment, a pair of first ribs 100 are formed on the sides of arrows C and D relative to the storage portion 48, respectively, but there may be any number of first ribs 100. Similarly, a pair of second ribs 102 are formed on the sides of arrows E and F relative to the storage portion 48, respectively, but there may be any number of second ribs 102.

[0065] In the above embodiment, the first cutout 106 houses the rib vibration-proof portion 122, but the rib vibration-proof portion 122 may be omitted. Similarly, the rib vibration-proof portion 124 may also be omitted.

[0066] While one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above, and it goes without saying that the present disclosure can be implemented in various modified forms without departing from the spirit and scope of the present disclosure.

[0067] With respect to the present disclosure, the following notes are disclosed. (Appendix 1) A stator (12) configured in an annular shape; A shaft (20) disposed inside the stator; a center piece (16) supporting the stator and the shaft; A base plate (24) fixed to the center piece; a case (22) having a housing portion (48) for housing the substrate and a flange (50) extending around the housing portion, the case (22) being fixed to the center piece by a first fixing portion (60); a motor holder (28) fixed to the case by a second fixing portion (62); Equipped with The case has a rib (100) that connects a side surface of the storage portion and the flange, The rib has a notch (106) formed therein. Motor (10). (Appendix 2) The notch extends in a height direction of the rib, One end (106A) of the notch reaches the lower end (100A) of the rib in the height direction, The other end (106B) of the notch terminates closer to the lower end (100A) than the upper end (100B) in the height direction of the rib. 2. The motor according to claim 1. (Appendix 3) The flange has a slit (80) formed therein. The notch is connected to the slit. 3. The motor according to claim 1 or 2. (Appendix 4) The notch is provided with an elastic member (30). 4. The motor according to claim 1, (Appendix 5) The flange has a slit formed therein, The slit is provided with an elastic member. 5. The motor according to claim 1 , (Appendix 6) The flange has an outer wall portion (104) that faces a side surface of the storage portion, The rib connects a side surface of the storage portion and the outer wall portion. 6. The motor according to claim 1 , (Appendix 7) The rib extends vertically. 7. The motor according to claim 1 , (Appendix 8) The case is A first rib (100) as the rib; a second rib (102) extending horizontally and connecting the side surface of the housing portion and the flange; having 8. The motor according to claim 1 , (Appendix 9) An elastic member is provided in the case, The elastic member is a first seal portion (74) that seals between the center piece and the case; a second seal portion (76) that seals between the case and the motor holder; a vibration-proof portion (78) provided on a vibration transmission path connecting the first fixed portion and the second fixed portion, 9. The motor according to any one of claims 1 to 8. [Explanation of symbols]

[0068] 10...motor, 12...stator, 14...rotor, 16...center piece, 18...ball bearing, 20...shaft, 20A...fixed portion, 22...case, 24...board, 26...connector member, 28...motor holder, 30...elastic member, 32...stator core, 34...insulator, 36...winding, 38...rotor housing, 40...rotor magnet, 42...plate-shaped portion, 44...shaft core portion, 44A...through hole, 44B...recess, 46...cylindrical portion, 48...accommodating portion, 48A...side surface, 50...flange, 52...first annular portion, 54...second annular portion, 56...mounting portion, 58...intake portion, 58A...intake port, 58B...intake passage, 60...first fixed portion, 62...second fixed portion, 64...extension portion , 64A...groove, 66...projection, 68...engagement hole, 70...engagement portion, 72...base portion, 74...first seal portion, 76...second seal portion, 78...flange vibration-proof portion, 80...slit, 88...first vibration-proof portion, 90...second vibration-proof portion, 100...first rib, 100A...lower end portion, 100B...upper end portion, 102...second rib, 102A...lower end portion, 102B ...upper end portion, 104...outer wall portion, 106...first notch, 106A...lower end portion, 106B...upper end portion, 108...inner portion, 110...outer portion, 112...connecting portion, 114...second notch, 114A...lower end portion, 114B...upper end portion, 116...inner portion, 118...outer portion, 120...connecting portion, 122...rib vibration-proof portion, 124...rib vibration-proof portion

Claims

1. A stator (12) configured in an annular shape; A shaft (20) disposed inside the stator; A center piece (16) that supports the stator and the shaft; A substrate (24) fixed to the center piece; a case (22) having a housing portion (48) for housing the substrate and a flange (50) extending around the housing portion, the case (22) being fixed to the center piece by a first fixing portion (60); a motor holder (28) fixed to the case by a second fixing portion (62); Equipped with The case has a rib (100) that connects a side surface of the housing portion and the flange, The rib has a notch (106) formed therein. Motor (10).

2. The notch extends in a height direction of the rib, One end (106A) of the notch reaches the lower end (100A) of the rib in the height direction, The other end (106B) of the notch terminates closer to the lower end (100A) than the upper end (100B) in the height direction of the rib. The motor according to claim 1 .

3. The flange has a slit (80) formed therein, The notch is connected to the slit. The motor according to claim 1 .

4. The cutout is provided with an elastic member (30). The motor according to claim 1 .

5. The flange has a slit formed therein, The slit is provided with an elastic member. The motor according to claim 1 .

6. The flange has an outer wall portion (104) that faces a side surface of the storage portion, The rib connects a side surface of the storage portion and the outer wall portion. The motor according to claim 1 .

7. The rib extends vertically. The motor according to claim 1 .

8. The case is A first rib (100) as the rib; A second rib (102) extending horizontally and connecting the side surface of the housing portion and the flange; having The motor according to claim 1 .

9. An elastic member is provided in the case, The elastic member is a first seal portion (74) for sealing between the center piece and the case; a second seal portion (76) that seals between the case and the motor holder; and a vibration isolating portion (78) provided on a vibration transmission path connecting the first fixed portion and the second fixed portion. The motor according to claim 1 .

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