JPWO2018097048A1 - Blower - Google Patents

Abstract

One aspect of the blower of the present invention includes an impeller that is rotatable around a central axis extending in one direction, a motor that is disposed radially inside the impeller, and that rotates the impeller around the central axis, A connected lead cable; a motor support that supports the motor on one side in the axial direction of the impeller; a housing that is disposed radially outward from the motor support and surrounds the impeller and the motor in the circumferential direction; and a motor support; A plurality of housing ribs that connect the housing, and a spacer that is fixed to one side in the axial direction of the housing and has a frame portion. The lead cable is drawn from the motor to the outside in the radial direction from the housing. The surface on the other axial side of the frame portion is in contact with the surface on the one axial side of the housing. The frame has a first recess that is recessed from the surface on the other axial side of the frame to the one axial side. The first recess has a first opening on the radially inner side surface of the frame, and is disposed at a position overlapping the lead cable in the axial direction. [Selection] Figure 4

Description

The present invention relates to a blower.

For example, as shown in Patent Document 1, a blower including a casing surrounding an impeller is known. When such a blower is attached to a housing such as a computer, the attachment surface is often the surface opposite to the motor base that supports the motor that rotates the impeller in the casing.

JP 2002-5093 A

However, the blower as described above may be attached to a housing such as a computer using the surface on the motor base side of the casing as an attachment surface. In this case, the lead cable electrically connected to the motor protrudes from the surface on the motor base side of the casing, and it may be difficult to attach the blower to the casing. In addition, there are cases where the mounting accuracy of the blower with respect to the housing cannot be obtained sufficiently.

In view of the above-described problems, an object of the present invention is to provide a blower that can be easily and accurately attached to a member to be attached with the motor support side facing the member to be attached.

One aspect of the blower of the present invention includes an impeller that is rotatable around a central axis extending in one direction, a motor that is disposed radially inside the impeller, and that rotates the impeller around the central axis, and the motor A lead cable that is electrically connected to the motor, a motor support that supports the motor on one side in the axial direction of the impeller, and a radially outer side than the motor support, and the impeller and the motor are arranged in a circumferential direction. A housing that surrounds the housing, a plurality of housing ribs that connect the motor support portion and the housing, and a spacer that is fixed to one side in the axial direction of the housing and that has a frame portion, and the lead cable extends from the motor. It is drawn out radially outward from the housing, and the surface on the other axial side of the frame portion is in contact with the surface on the one axial side of the housing. The frame portion has a first recess recessed in one axial direction from the other axial surface of the frame portion, and the first recess has a first opening on a radially inner side surface of the frame portion. There is provided a blower device that has a portion and is disposed at a position overlapping the lead cable in the axial direction.

According to one aspect of the present invention, there is provided a blower device that can be easily and accurately attached to the attached member in a state where the motor support portion side is directed to the attached member.

Drawing 1 is a figure which looked at the air blower of a 1st embodiment from the front side. FIG. 2 is a view showing the blower of the first embodiment, and is a cross-sectional view taken along the line II-II in FIG. Drawing 3 is a figure which looked at the air blower of a 1st embodiment from the back side. FIG. 4 is a perspective view showing the spacer of the first embodiment. FIG. 5 is a front view of the spacer according to the first embodiment. FIG. 6 is a view showing the spacer portion of the first embodiment, and is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a perspective view showing a spacer according to the second embodiment. FIG. 8 is a perspective view showing a spacer according to the third embodiment. FIG. 9 is a perspective view showing the spacer of the fourth embodiment. FIG. 10 is a perspective view showing a spacer portion of the fifth embodiment. FIG. 11 is a view showing a spacer portion of the fifth embodiment and is a cross-sectional view taken along the line XI-XI in FIG. FIG. 12 is a perspective view showing the spacer of the sixth embodiment. FIG. 13 is a perspective view showing a spacer according to the seventh embodiment. FIG. 14 is a perspective view showing a spacer according to the eighth embodiment.

1ST EMBODIMENT As shown in FIG. 1, the air blower 10 of this embodiment is attached to the to-be-attached member B. As shown in FIG. The attached member B is, for example, a plate member that constitutes a part of a housing such as a computer. As shown in FIGS. 1 to 3, the blower 10 includes an impeller 20 that can rotate around a central axis J extending in one direction, a motor 30, a motor support 40, a circuit board 80, a housing 50, A plurality of housing ribs 51, a cable guide portion 70, a lead cable 81, a sealing material 90, and a spacer 60 are provided. In the present embodiment, the one direction in which the central axis J extends is one of the horizontal directions. In FIG. 3, the illustration of the spacer 60 is omitted.

In the XYZ coordinate system shown in each drawing, the Z-axis direction is the vertical direction. The X-axis direction is a horizontal direction orthogonal to the Z-axis direction, and is a direction parallel to the direction in which the central axis J extends. The Y-axis direction is a horizontal direction orthogonal to both the Z-axis direction and the X-axis direction. In the following description, the X-axis direction, that is, the direction parallel to the central axis J is simply referred to as “axial direction”, the radial direction around the central axis J is simply referred to as “radial direction”, and the central axis J is the center. The circumferential direction is simply referred to as “circumferential direction”. A direction parallel to the Z-axis direction is referred to as “vertical direction”. The positive side in the X-axis direction is referred to as “front side”, and the negative side in the X-axis direction is referred to as “rear side”. In the present embodiment, “front side” corresponds to the other side in the axial direction, and “rear side” corresponds to one side in the axial direction. The positive side in the Z-axis direction is referred to as “upper side”, and the negative side in the Z-axis direction is referred to as “lower side”. The vertical direction, the horizontal direction, the front side, the rear side, the upper side, and the lower side are simply names used for explanation, and do not limit the actual positional relationship and direction.

As shown in FIGS. 1 and 2, the impeller 20 includes a cylindrical impeller cup 21 that opens to the rear side, and a plurality of blades 22 that are arranged on the outer peripheral surface of the impeller cup 21 along the circumferential direction. .

As shown in FIG. 2, the motor 30 is disposed on the radially inner side of the impeller 20 and rotates the impeller 20 around the central axis J. More specifically, the motor 30 is disposed inside the impeller cup 21. In the present embodiment, the motor 30 rotates the impeller 20 in a counterclockwise direction as viewed from the front side, for example. In the following description, the side on which the blade 22 advances in the circumferential direction, that is, the side that advances counterclockwise when viewed from the front side may be referred to as the “downstream side”. The side proceeding clockwise as viewed from the front side may be referred to as the “upstream side”. An arrow DR shown in each figure indicates a direction in which the impeller 20 rotates. In the present embodiment, the downstream side corresponds to one side in the circumferential direction.

As shown in FIG. 2, the motor 30 includes a shaft 31, a stator 34, a rotor cup 32, and a rotor magnet 33. The shaft 31 extends in the axial direction about the central axis J. The shaft 31 is inserted on the radially inner side of a stator support portion 41 described later. The shaft 31 is rotatably supported on the radially inner side surface of the stator support portion 41 via a bearing. An impeller cup 21 is fixed to the front end of the shaft 31. The stator 34 is an annular shape surrounding the shaft 31 in the circumferential direction. The stator 34 is fixed to the outer peripheral surface of the stator support portion 41. The fixing method of the stator 34 is not particularly limited, such as fitting, adhesion, and press fitting. The stator 34 is electrically connected to the circuit board 80.

The rotor cup 32 has a cylindrical shape that opens to the rear side, and is disposed on the radially outer side of the stator 34. The front portion of the rotor cup 32 is disposed on the radially inner side of the impeller cup 21. The rotor cup 32 is fixed to the impeller cup 21. In addition, the fixing structure of the rotor cup 32, the impeller cup 21, and the shaft 31 is not limited to this. The rotor magnet 33 is fixed to the inner peripheral surface of the rotor cup 32. The rotor magnet 33 is, for example, cylindrical. The rotor magnet 33 faces the stator 34 via a gap in the radial direction outside the stator 34 in the radial direction.

The motor support unit 40 supports the motor 30 on the rear side of the impeller 20. The motor support portion 40 includes a housing portion 42 and a stator support portion 41. The accommodating portion 42 has a cup shape that opens to the front side. The accommodating part 42 accommodates the circuit board 80. The accommodating portion 42 is disposed on the rear side of the motor 30.

The accommodating portion 42 includes a bottom surface portion 42a that expands in the radial direction, and a cup-shaped cylindrical portion 42b that extends forward from the radial outer edge of the bottom surface portion 42a. As shown in FIG. 3, the bottom surface portion 42a has a bottom surface portion through hole 42c that penetrates the bottom surface portion 42a in the axial direction. The bottom surface through hole 42c is provided on the outer edge in the radial direction of the bottom surface 42a.

As shown in FIG. 2, the cylindrical portion 42 b surrounds the radially outer side of the rear end of the stator 34, the rear end of the rotor cup 32, and the rear end of the rotor magnet 33 in the circumferential direction. The stator support portion 41 extends forward from the bottom surface portion 42a. The stator support portion 41 has a cylindrical shape centered on the central axis J.

The circuit board 80 has a plate shape extending in the radial direction. The circuit board 80 is disposed on the radially inner side of the cylindrical portion 42b. The circuit board 80 is disposed on the rear side of the motor 30 and at least partially overlaps the motor 30 in the axial direction. The circuit board 80 is fixed to the motor support 40, for example. A coil of the stator 34 is connected to the circuit board 80. Thereby, the circuit board 80 is electrically connected to the motor 30.

The housing 50 is disposed on the outer side in the radial direction than the motor support portion 40. As shown in FIGS. 2 and 3, the housing 50 has a rectangular tube shape extending in the axial direction. The housing 50 surrounds the impeller 20 and the motor 30 in the circumferential direction from the radially outer side. In FIG. 2, the rear end of the housing 50 is in the same position as the rear end of the motor support 40 in the axial direction. In FIG. 3, the outer shape of the housing 50 is substantially square when viewed in the axial direction. The housing 50 has corner portions 50a arranged at the four corners. The corner 50a has a substantially triangular shape when viewed in the axial direction. The rear surface of the corner portion 50a has a slope portion 50b located on the front side as it goes from the radially outer side to the radially inner side in the radially inner portion.

The housing 50 has a fourth recess 50 c that is recessed forward from the rear surface of the housing 50. In the present embodiment, the fourth recess 50c is provided in one of the corners 50a. The fourth recess 50 c penetrates the housing 50 from the radially inner side surface of the housing 50 to the radially outer side surface of the housing 50. In FIG. 3, the 4th recessed part 50c has penetrated the corner | angular part 50a to the up-down direction.

The plurality of housing ribs 51 connect the motor support portion 40 and the housing 50. More specifically, the plurality of housing ribs 51 connect the outer peripheral surface of the accommodating portion 42 and the radially inner side surface of the housing 50. The plurality of housing ribs 51 are arranged at equal intervals along the circumferential direction. In FIG. 3, three housing ribs 51 are provided. The housing rib 51 extends in a direction inclined with respect to the radial direction when viewed in the axial direction. In FIG. 3, the housing rib 51 has a linear shape inclined toward the downstream side from the motor support portion 40 toward the housing 50 when viewed in the axial direction.

The cable guide unit 70 connects the motor support unit 40 and the housing 50. More specifically, the cable guide portion 70 connects the outer peripheral surface of the accommodating portion 42 and the radially inner side surface of the housing 50. In the present embodiment, the cable guide portion 70 is one of the plurality of housing ribs 51. Thereby, since the housing rib 51 can be utilized as the cable guide part 70, it is not necessary to provide a cable guide part separately. Therefore, it is possible to reduce the number of portions that connect the motor support portion 40 and the housing 50, and to inhibit the flow of wind passing between the motor support portion 40 and the housing 50 from being inhibited. Therefore, it can suppress that the ventilation efficiency of the air blower 10 falls. In FIG. 3, the cable guide portion 70 extends substantially along the vertical direction.

The cable guide portion 70 has a cable lead-out passage 70a. The cable lead-out passage 70a extends along the extending direction in which the cable guide portion 70 extends. The cable lead-out passage 70 a is a groove that is recessed from the rear surface of the cable guide portion 70 to the front side. Cable lead-out passage 70a
Are open at both ends of the cable guide portion 70 in the extending direction. The opening of the cable lead-out passage 70a on the motor support portion 40 side is connected to the bottom surface through hole 42c. The opening on the housing 50 side of the cable lead-out passage 70a is connected to the fourth recess 50c. By providing the cable lead-out passage 70a and the fourth recess 50c continuously, a passage extending linearly along the extending direction of the cable guide portion 70 is configured.

The lead cable 81 is electrically connected to the motor 30. Although not shown, the lead cable 81 is connected to the circuit board 80 and is electrically connected to the motor 30 via the circuit board 80. The lead cable 81 is drawn from the motor 30 to the outside in the radial direction from the housing 50. In the present embodiment, the lead cable 81 is drawn outward in the radial direction from the housing 50 via the cable lead-out passage 70a and the fourth recess 50c. More specifically, the lead cable 81 is guided from the inside of the housing portion 42 into the cable lead-out passage 70a through the bottom surface through hole 42c, and more radially than the housing 50 from the radially outer opening of the fourth recess 50c. Pulled out to the outside. In FIG. 3, the lead cable 81 is drawn upward from the housing 50. As shown in FIG. 1, a part of the lead cable 81 drawn upward from the housing 50 is fixed to the attachment member B by a fixing portion B1.

As shown in FIG. 3, the lead cable 81 is fixed to the cable guide portion 70 by a binding band 83. The binding band 83 is an annular shape that collectively surrounds the lead cable 81 and the cable guide portion 70. The binding band 83 contacts the rear end of the lead cable 81 and presses the lead cable 81 against the inner surface of the cable lead-out path 70a. Thereby, it can suppress that the lead cable 81 remove | deviates from the inside of the cable extraction channel | path 70a. The lead cable 81 is configured, for example, by covering a plurality of lead wires with a flexible tube. The outer shape of the cross section of the lead cable 81 is substantially circular when no external force is applied. When the lead cable 81 is inserted into the cable lead-out passage 70a, the lead cable 81 may be deformed by receiving a force from the inner side surface of the cable lead-out passage 70a. The outer shape of the cross section of the lead cable 81 may be a polygonal shape such as a rectangle or a triangle when no external force is applied.

As shown in FIG. 2, the sealing material 90 is disposed inside the accommodating portion 42. In FIG. 2, the sealing material 90 is filled in the rear part inside the accommodating part 42. The sealing material 90 covers at least a part of the circuit board 80. In FIG. 2, the circuit board 80 is embedded in the sealing material 90, and the sealing material 90 covers the entire circuit board 80. The sealing material 90 is, for example, silicone.

The spacer 60 is a member having a rectangular frame shape as a whole. The outer shape of the spacer 60 is substantially square when viewed in the axial direction. The spacer 60 is fixed to the rear side of the housing 50. As shown in FIG. 4, the spacer 60 includes a frame portion 61, a facing portion 62, and a plurality of spacer ribs 63.

The frame portion 61 has a rectangular frame shape that surrounds the impeller 20 and the motor 30 in the circumferential direction when viewed in the axial direction. As shown in FIG. 5, the frame portion 61 has corner portions 61 a arranged at the four corners. The corner 61a has a substantially triangular shape when viewed in the axial direction. The corner 61a overlaps the corner 50a of the housing 50 in the axial direction. The shape of the frame 61 viewed in the axial direction is substantially the same as the shape of the housing 50 viewed in the axial direction. As viewed in the axial direction, the entire frame portion 61 substantially overlaps the entire housing 50. As shown in FIG. 2, the front surface of the frame portion 61 is in contact with the rear surface of the housing 50. As shown in FIG. 4, the frame portion 61 has a first recess 64.

The first concave portion 64 is recessed from the front surface of the frame portion 61 to the rear side. The first recess 64 has a first opening 64 a on the radially inner side surface of the frame portion 61 and a second opening 64 b on the radially outer surface of the frame portion 61. That is, the first recess 64 penetrates the frame portion 61 from the radially inner side surface of the frame portion 61 to the radially outer surface of the frame portion 61. In the present embodiment, the first opening 64a opens downward. In the present embodiment, the second opening 64b opens upward. As shown in FIG. 6, the first recess 64 is opposed to the fourth recess 50c in the axial direction. As shown in FIG. 5, the first recess 64 is arranged at a position overlapping the lead cable 81 in the axial direction.

According to the present embodiment, the motor support portion 40 is provided on the rear side of the impeller 20, and the spacer 60 is provided in contact with the rear side surface of the housing 50. Therefore, as shown in FIG. 2, the rear surface of the spacer 60 is brought into contact with the attached member B, and the blower 10 is fixed to the attached member B, for example, as shown in FIG. 6, the lead cable 81. Even if it protrudes to the rear side of the rear surface of the housing 50, the protruding portion of the lead cable 81 can be released by the thickness of the spacer 60 in the axial direction. Therefore, the blower 10 can be easily attached to the attached member B via the spacer 60. At this time, the blower 10 is attached to the attached member B with the motor support portion 40 side, that is, the rear side facing the attached member B.

Further, since the first recess 64 that overlaps the lead cable 81 in the axial direction is provided in the frame portion 61, even if the lead cable 81 protrudes rearward from the housing 50 at a position that overlaps the frame portion 61 in the axial direction. As shown in FIG. 6, the protruding portion of the lead cable 81 can be released by the first recess 64. As a result, the front surface of the frame portion 61 and the rear surface of the housing 50 can be brought into contact with each other with high accuracy. Therefore, the spacer 60 can be accurately positioned with respect to the housing 50. As a result, it is possible to improve the mounting accuracy of the blower device 10 that is mounted to the mounted member B via the spacer 60.

As described above, according to the present embodiment, it is possible to obtain the blower 10 that can be easily and accurately attached to the attached member B with the motor support portion 40 side facing the attached member B. In the present embodiment, a part of the lead cable 81 is disposed rearward of the rear surface of the housing 50 and is disposed in the first recess 64. The effect mentioned above can be obtained usefully. The means for attaching the blower 10 to the attached member B is not particularly limited. In the present embodiment, the blower 10 is fixed and attached to the attached member B by tightening a screw that penetrates the corner 50a of the housing 50 and the corner 61a of the spacer 60 into the attached member B. .

Further, when the lead cable 81 is fastened to the cable guide portion 70 with the binding band 83 as in this embodiment, the binding band 83 may protrude rearward from the housing 50. On the other hand, according to this embodiment, since the protrusion part of the binding band 83 can be escaped with the spacer 60, the air blower 10 can be easily attached with respect to the to-be-attached member B. FIG.

In the present embodiment, the first recess 64 includes a first opening 64 a and a second opening 64 b as openings that open on both surfaces in the radial direction of the frame 61. Therefore, the lead cable 81 drawn out radially outward from the housing 50 is more easily escaped by the first recess 64.

Further, in the present embodiment, the housing 50 is provided with a fourth recess 50c facing the first recess 64, and the lead cable 81 is drawn out radially outside the housing 50 via the fourth recess 50c. ing. Therefore, at least a part of the lead cable 81 is disposed in the fourth recess 50c at a position overlapping the frame portion 61 in the axial direction. Thereby, the protrusion amount of the part of the lead cable 81 protruding rearward from the housing 50 can be reduced. Accordingly, the axial dimension of the first recess 64 can be reduced, and the rigidity of the spacer 60 can be suppressed from decreasing. In the present embodiment, the axial dimension of the first recess 64 is, for example, smaller than the axial dimension of the fourth recess 50c.

Moreover, in this embodiment, since the cable guide part 70 which has the cable extraction path | route 70a connected with the 4th recessed part 50c is provided, the lead cable 81 is suitable along the desired path | route from the motor 30 to the 4th recessed part 50c. Can be guided to. Thereby, it is possible to suppress the movement of the lead cable 81 between the motor 30 and the fourth recess 50 c, and it is possible to suppress the lead cable 81 from being disposed at a position where it interferes with the spacer 60. Therefore, the blower 10 can be attached to the mounted member B more easily and accurately through the spacer 60.

As shown in FIG. 6, in the present embodiment, the shape of the inner surface of the first recess 64 is constituted by three of the sides constituting a substantially rectangular shape when viewed in the vertical direction. In the width direction orthogonal to both the axial direction and the vertical direction, the dimension of the first recess 64 is, for example, larger than the dimension of the fourth recess 50c. The dimension in the width direction of the first recess 64 is larger than the dimension in the axial direction of the first recess 64, for example. Note that the width direction is a direction parallel to the Y-axis direction. In the following description, a direction parallel to the Y-axis direction is referred to as a “width direction”.

As shown in FIG. 5, the downstream side surface 64 d that is the downstream side surface of the inner surface of the first recess 64 is inclined with respect to the surface orthogonal to the circumferential direction. Therefore, when the wind flowing along the circumferential direction collides with the downstream side surface 64d, it is easy to receive the wind along the downstream side surface 64d. Thereby, the interference sound which arose by the wind colliding with the downstream side surface 64d can be reduced. More specifically, the downstream side surface 64d is inclined with respect to a virtual surface including a virtual line passing through the central axis J and the downstream end of the first opening 64a among the virtual surfaces orthogonal to the circumferential direction. . The downstream side surface 64d is parallel to the axial direction, for example. The downstream side surface 64d is positioned on the downstream side from the radially inner side toward the radially outer side.

As shown in FIG. 4, the facing portion 62 has a cylindrical shape centered on the central axis J. As shown in FIG. 2, the facing portion 62 faces the rear surface of the motor support portion 40 in the axial direction on the radially inner side of the frame portion 61. In FIG. 2, a gap is provided between the opposing portion 62 and the motor support portion 40 in the axial direction. Therefore, even if the lead cable 81 protrudes rearward from the housing 50 at a position overlapping the motor support portion 40 in the axial direction, the lead cable is caused by the axial clearance between the facing portion 62 and the motor support portion 40. 81 protruding portions can be released. The rear surface of the facing portion 62 is in contact with the mounted member B. The dimension of the opposing part 62 in the axial direction is smaller than the dimension of the frame part 61 in the axial direction, for example.

As shown in FIG. 5, the plurality of spacer ribs 63 connect the facing portion 62 and the frame portion 61 and are arranged side by side along the circumferential direction. Therefore, the spacer rib 63 can be used as a stationary blade. Thereby, the flow of the wind passing through the inside of the spacer 60 can be adjusted by the spacer rib 63. Therefore, the air volume characteristic of the blower 10 can be improved.

In the lead cable 81, the lead-out portion 82 located between the facing portion 62 and the frame portion 61 when viewed in the axial direction overlaps with the gap 65 between the spacer ribs 63 adjacent in the circumferential direction in the axial direction. Therefore, even if the drawer portion 82 projects rearward from the housing 50, the drawer portion 82 can be escaped by the gap 65. Therefore, the air blower 10 can be attached to the attached member B more easily and accurately.

Among the gaps 65 between the spacer ribs 63 adjacent to each other in the circumferential direction, the first gap 65a that overlaps with the leading portion 82 is more than the other gaps 65b except the first gap 65a among the gaps 65 between the spacer ribs 63 adjacent to each other in the circumferential direction. The circumferential dimension is large. Therefore, the drawer portion 82 is easily overlapped with the first gap 65a in the axial direction, and the protruding portion of the drawer portion 82 is more easily escaped by the first gap 65a.

The circumferential dimension of the plurality of gaps 65b is, for example, the same. That is, a plurality of spacer ribs 63 are provided between the spacer rib 63a adjacent to the downstream side of the first gap 65a and the spacer rib 63b adjacent to the upstream side of the first gap 65a in the direction in which the impeller 20 rotates in the circumferential direction. Are arranged at equal intervals along the circumferential direction. For example, in FIG. 5, eleven spacer ribs 63 are provided. The arrangement relationship of the eleven spacer ribs 63 is the same as the arrangement relationship of the eleven spacer ribs when one spacer rib is removed from the twelve spacer ribs arranged at equal intervals along the circumferential direction. . The removed first spacer rib provides a first gap 65a having a circumferential dimension larger than that of the gap 65b.

As shown in FIG. 2, the axial dimension of the spacer rib 63 is smaller than the axial dimension of the facing portion 62. The front end of the spacer rib 63 is disposed at the same position as the front end of the facing portion 62 in the axial direction. The rear end of the spacer rib 63 is disposed in front of the rear end of the facing portion 62. In a state where the blower 10 is attached to the attached member B, a gap is provided between the spacer rib 63 and the attached member B. Therefore, even if the spacer rib 63 vibrates, the spacer rib 63 can be prevented from contacting the attached member B.

As shown in FIG. 5, the spacer rib 63 extends in a direction inclined with respect to the radial direction when viewed in the axial direction. In FIG. 5, the spacer rib 63 has a linear shape inclined toward the upstream side from the facing portion 62 toward the frame portion 61 when viewed in the axial direction. As shown in FIG. 4, in the present embodiment, the spacer rib 63 has a blade shape having a wind receiving surface 63c that is inclined with respect to the axial direction. Therefore, the spacer rib 63 functions as a stationary blade that rectifies the wind sent by the impeller 20, and the rectifying effect by the spacer rib 63 can be obtained more greatly.

The wind receiving surface 63c is an inclined surface that inclines in a direction in which the rear end edge in the cross section orthogonal to the radial direction is positioned downstream of the front end edge in the rotation direction of the impeller 20. The wind receiving surface 63c faces the front side. The front end of the wind receiving surface 63c and the rear end of the wind receiving surface 63c are connected by a flat surface or a smooth curved surface.

The present invention is not limited to the above-described embodiment, and other configurations can be employed. In the following description, the same configurations as those described above may be omitted by appropriately attaching the same reference numerals.

The shape of the facing part 62 is not particularly limited. The facing portion 62 may be, for example, a polygonal cylinder shape, a disk shape, or a polygonal plate shape. The number of spacer ribs 63 is not particularly limited. The number of the spacer ribs 63 may be at least more than 11, or more than 11. Further, the plurality of spacer ribs 63 may be arranged at different intervals along the circumferential direction while following the direction in which the impeller 20 rotates along the circumferential direction from the spacer rib 63a to the spacer rib 63b. That is, the circumferential dimension of the plurality of gaps 65b may be different from each other. The shape of the spacer rib 63 is not particularly limited, and may not be a stationary blade shape. The shape of the spacer rib 63 may be the same as the shape of the housing rib 51. Moreover, the opposing part 62 and the spacer rib 63 do not need to be provided.

Further, the lead cable 81 does not have to protrude rearward from the housing 50. Further, the binding band 83 may not be provided. The cable guide part 70 may be provided separately from the housing rib 51. The cable guide part 70 may not be provided. The 4th recessed part 50c does not need to be provided.

Second Embodiment In the blower device 110 of the present embodiment shown in FIG. 7, the first recess 164 of the frame portion 161 in the spacer 160 has a circumferential dimension relative to the first recess 64 of the first embodiment. large. The 1st recessed part 164 is provided over the whole corner | angular part 61a in which the 1st recessed part 164 was provided. The bottom surface 164c of the first recess 164 is the front surface of the corner 61a where the first recess 164 is provided. By providing the first recess 164, the dimension in the axial direction of the corner 61a provided with the first recess 164 is smaller than the dimension in the axial direction of the other corner 61a. According to this embodiment, since the 1st recessed part 164 is comparatively large, the lead cable 81 is easy to escape by the 1st recessed part 164 also with respect to the various housing from which the position of the circumferential direction of the lead cable 81 pulled out differs, for example. .

Third Embodiment In the blower device 210 of the present embodiment shown in FIG. 8, the spacer 260 has a pair of first wall portions 266a and 266b and a second wall portion 266c. The pair of first wall portions 266a and 266b extend from both circumferential edges of the first opening 64a to the facing portion 62. Therefore, the wind passing through the gap 65 between the spacer ribs 63 adjacent in the circumferential direction is hindered by the pair of first wall portions 266a and 266b and hardly enters the first recess 64. Thereby, it is possible to suppress the wind passing through the gap 65 from leaking from the first recess 64 to the outer side in the radial direction of the spacer 260. Therefore, according to this embodiment, it can suppress that the ventilation efficiency of the air blower 210 falls.

The first wall portions 266a and 266b have a rectangular plate shape. The plate surfaces of the first wall portions 266a and 266b are parallel to the axial direction. The direction in which the first wall portions 266 a and 266 b extend is parallel to the extending direction of the cable guide portion 70. The front ends of the first wall portions 266 a and 266 b are in contact with the rear end of the cable guide portion 70.

The second wall portion 266c extends from the rear edge portion of the first opening 64a to the facing portion 62. The second wall portion 266c has a rectangular plate shape. The plate surface of the second wall portion 266c is parallel to the axial direction and substantially orthogonal to the plate surfaces of the first wall portions 266a and 266b. The direction in which the second wall portion 266 c extends is parallel to the extending direction of the cable guide portion 70. The second wall portion 266c connects end portions on the rear side of the pair of first wall portions 266a and 266b in the circumferential direction.

According to the present embodiment, the first wall portions 266a and 266b and the second wall portion 266c are provided, so that the cover 267 is configured by the first wall portions 266a and 266b, the second wall portion 266c, and the facing portion 62. Is done. The inner side of the cover 267 is connected to the inner side of the first recess 64. Therefore, the wind passing through the gap 65 between the spacer ribs 63 adjacent in the circumferential direction is blocked by the cover 267 and is less likely to enter the first recess 64. Thereby, it can suppress more that the wind which passes the clearance gap 65 leaks from the 1st recessed part 64 to the radial direction outer side of the spacer 260. FIG. Therefore, according to this embodiment, it can suppress more that the ventilation efficiency of the air blower 210 falls.

In the present embodiment, the cover 267 covers the rear side of the cable guide portion 70 and closes the opening on the rear side of the cable lead-out passage 70a. Therefore, for example, the resin or the like can be filled in the cover 267 and the cable drawing path 70a. Thereby, the space between the outer surface of the lead cable 81 and the inner surface of the cover 267 and the space between the outer surface of the lead cable 81 and the inner surface of the cable lead-out passage 70a can be filled with the resin. Can be further prevented from leaking to the outside in the radial direction of the spacer 260. In the present embodiment, the cable guide portion 70 and the fourth recess 50c may not be provided.

Fourth Embodiment In the air blower 310 of this embodiment shown in FIG. 9, the spacer 360 has spacer ribs 363. The spacer rib 363 is disposed between the circumferential direction of the spacer rib 63a and the spacer rib 63b. In the present embodiment, twelve spacer ribs including the plurality of spacer ribs 63 and the spacer ribs 363 of the first embodiment are arranged at equal intervals over the entire circumference in the circumferential direction. Although illustration is omitted, a part of the spacer rib 363 overlaps the lead cable 81 in the axial direction.

The spacer rib 363 that overlaps the lead cable 81 in the axial direction has a second recess 363 c that is recessed rearward from the front end of the spacer rib 363. The second recess 363c overlaps the lead cable 81 in the axial direction. Therefore, even when the lead cable 81 protrudes rearward from the housing 50, the spacer rib 363 is disposed at a position overlapping the lead cable 81 in the axial direction, and the protruding portion of the lead cable 81 is formed by the second recess 363c. I can escape. Accordingly, the spacer 360 can be accurately positioned with respect to the housing 50 while increasing the number of the spacer ribs to enhance the rectification effect. The second recess 363 c is provided at the radially inner end of the spacer rib 363.

In the present embodiment, the facing portion 362 has a third recess 362 a that is recessed rearward from the front surface of the facing portion 362. Although not shown, the third recess 362a overlaps the lead cable 81 in the axial direction. Therefore, even if the lead cable 81 protrudes to the rear side of the housing 50 at a position overlapping the facing portion 362 in the axial direction, the protruding portion of the lead cable 81 can be escaped by the third recess 362a. Thereby, the spacer 360 can be accurately positioned with respect to the housing 50.

The third recess 362a penetrates the wall portion of the facing portion 362 in the radial direction. Spacer ribs 363 are connected to the rear peripheral edge of the third recess 362a. The third recess 362a is connected to the second recess 363c.

Fifth Embodiment In the blower 410 of this embodiment shown in FIG. 10, the spacer 460 has a convex portion 468. The convex portion 468 protrudes from the inner side surface of the first concave portion 64. Therefore, as shown in FIG. 11, the lead cable 81 inserted into the first recess 64 is brought into close contact with the convex portion 468, and wind is generated from between the outer surface of the lead cable 81 and the inner surface of the first recess 64. Leakage can be suppressed. Thereby, it can suppress that the ventilation efficiency of the air blower 410 falls.

As shown in FIG. 10, the convex portion 468 has a first portion 468a and a pair of second portions 468b. The first portion 468a protrudes forward from the surface facing the front side of the inner surface of the first recess 64. The first portion 468a extends in the width direction. The first portion 468a extends from one end in the width direction to the other end in the width direction of the inner surface of the first recess 64 facing the front side.

The pair of second portions 468b protrude in the width direction from each of the surfaces facing the both sides in the width direction of the inner surface of the first recess 64. The second portion 468b extends to the front side from both ends in the width direction of the first portion 468a. The second portion 468b extends from the rear end to the front end of the inner surface of the first recess 64 facing the width direction. As shown in FIG. 11, the first portion 468 a and the pair of second portions 468 b are in contact with the lead cable 81.

In the present embodiment, the lead cable 81 is in contact with the surface facing the front side of the inner surface of the first recess 64. Therefore, it is possible to suppress the leakage of wind from between the outer surface of the lead cable 81 and the inner surface of the first recess 64. Therefore, it can suppress that the ventilation efficiency of the air blower 410 falls. In the present embodiment, the lead cable 81 is in contact with the surface facing the width direction of the inner surface of the first recess 64. Thereby, it can suppress that a wind leaks from between the outer surface of the lead cable 81, and the inner surface of the 1st recessed part 64, and can suppress that the ventilation efficiency of the air blower 410 falls.

6TH EMBODIMENT In the air blower 510 of this embodiment shown in FIG. 12, the shape of the 1st recessed part 564 of the frame part 561 in the spacer 560 differs from the 1st recessed part 64 of 1st Embodiment. The inner surface of the first recess 564 has a semicircular arc shape that protrudes rearward when viewed in the vertical direction. That is, the inner surface of the first recess 564 has a shape along the outer surface of the lead cable 81. As a result, the gap between the outer surface of the lead cable 81 and the inner surface of the first recess 564 can be reduced or eliminated, and wind can flow from between the outer surface of the lead cable 81 and the inner surface of the first recess 564. Leakage can be suppressed. Therefore, it can suppress that the ventilation efficiency of the air blower 510 falls.

Seventh Embodiment In the blower 610 of this embodiment shown in FIG. 13, the frame portion 661 of the spacer 660 has a third wall portion 668. The third wall portion 668 is opposed to the first opening portion 64a via a gap. The radially inner side surface of the third wall portion 668 is a part of the inner side surface of the first recess 664. Therefore, the wind that has entered the first recess 664 from the first opening 64 a is blocked by the third wall 668 and can be prevented from leaking radially outward of the spacer 660. Thereby, it can suppress that the ventilation efficiency of the air blower 610 falls. In the present embodiment, the radially inner side surface of the third wall portion 668 constitutes a surface that faces the lower side of the inner surface of the first recess 664.

In the first recess 664, the second opening 64 b in the first embodiment is closed by the third wall 668. The radially outer surface of the third wall portion 668 is orthogonal to the vertical direction and constitutes a part of the radially outer surface of the frame portion 661. The front end of the third wall portion 668 is disposed at the same position as the front end of the first recess 664 in the axial direction. Note that the front end of the third wall portion 668 may be disposed on the rear side of the front end of the first recess 664. In FIG. 13, the third wall portion 668 closes the entire second opening 64b in the first embodiment, but is not limited thereto. The third wall portion 668 may block a part of the second opening 64b in the first embodiment.

<Eighth Embodiment> In the blower 710 of the present embodiment shown in FIG. 14, the spacer 760 has a protruding wall portion 769 that protrudes from the edge of the second opening 64 b on the radially outer side surface of the frame portion 61. . Therefore, the assembler can easily grasp the position of the first recess 64 using the protruding wall portion 769 as a mark, and can easily grasp the direction in which the spacer 760 is attached to the housing 50. Thereby, the assembly of the blower 710 can be facilitated. In addition, the shape of the jig used when attaching the spacer 760 to the housing 50 is a shape that interferes with the protruding wall portion 769 except in the correct direction, thereby preventing the spacer 760 from being fixed to the housing 50 in the wrong direction. it can.

In the present embodiment, the protruding wall portion 769 includes a first protruding wall portion 769a and a pair of second protruding wall portions 769b. The first protruding wall portion 769a protrudes upward from the rear edge portion of the edge portion of the second opening 64b. The first protruding wall portion 769a extends in the width direction. The pair of second protruding wall portions 769b protrudes upward from the respective edge portions on both sides in the width direction among the edge portions of the second opening portion 64b. The rear ends of the pair of second projecting wall portions 769b are respectively connected to both ends in the width direction of the first projecting wall portion 769a.

The protruding wall portion 769 has a fifth concave portion 769c that is recessed to the rear side. The 5th recessed part 769c is comprised by the 1st protrusion wall part 769a and a pair of 2nd protrusion wall part 769b. The fifth recess 769 c is connected to the first recess 64. The inner surface of the first recess 64 and the inner surface of the fifth recess 769c are continuously and smoothly connected. Accordingly, the first recess 64 and the fifth recess 769 c constitute an extension recess that extends in the vertical direction and has a size in the vertical direction larger than that of the first recess 64. The fifth recess 769c is arranged at a position overlapping the lead cable 81 in the axial direction.

In the present embodiment, for example, the lead cable 81 projects rearward from the housing 50 at a position overlapping the fifth recess 769c in the axial direction. Therefore, the lead cable 81 can be pulled out radially outside the housing 50 along the extended recess formed by the first recess 64 and the fifth recess 769c. Thereby, compared with the case where the protruding wall part 769 is not provided, the lead cable 81 can be made difficult to bend. Therefore, deterioration of the lead cable 81 can be suppressed.

In addition, since the fifth concave portion 769c is connected to the first concave portion 64, it is difficult for the wind passing through the gap 65 to escape from the first concave portion 64 to the outside in the radial direction of the spacer 760 via the fifth concave portion 769c. Therefore, it is possible to suppress the wind passing through the gap 65 from leaking to the outside in the radial direction of the spacer 760. Therefore, according to this embodiment, it can suppress that the ventilation efficiency of the air blower 710 falls.

In the present embodiment, the third recess 762a of the facing portion 762 extends in the circumferential direction. The third recess 762a extends from the upstream side to the downstream side of the portion of the facing portion 762 to which the spacer rib 763b adjacent to the upstream side of the first gap 65a is connected. The positions of both end portions of the third recess portion 762a in the width direction are substantially the same as the positions of both end portions of the first recess portion 64. In the present embodiment, the spacer rib 763b has a second recess 763c similar to the second recess 363c described above.

The to-be-attached member B to which the air blower of each embodiment mentioned above is attached is not specifically limited. The air blower of each embodiment mentioned above may be attached to any members. Moreover, the use of the air blower of each embodiment mentioned above is not specifically limited. The above-described configurations can be appropriately combined within a range that does not contradict each other.

DESCRIPTION OF SYMBOLS 10,110,210,310,410,510,610,710 ... Air blower, 20 ... Impeller, 22 ... Wing, 30 ... Motor, 40 ... Motor support part, 50 ... Housing, 50c ... 4th recessed part, 51 ... Housing Ribs, 60, 160, 260, 360, 460, 560, 660, 760 ... spacers, 61, 161, 561, 661 ... frame parts, 62, 362, 762 ... facing parts, 63, 63a, 63b, 363, 763b ... Spacer rib, 63c ... wind receiving surface, 64, 164, 564, 664 ... first recess, 64a ... first opening, 64b ... second opening, 65, 65b ... gap, 65a ... first gap, 70 ... cable guide Part, 70a ... cable lead-out path, 81 ... lead cable, 82 ... lead-out part, 266a ... first wall part, 266c ... second wall part, 362a, 762a ... third Department, 363 c, 763 c ... second recess 468 ... protrusion, 668 ... third wall portion, 769 ... projecting wall portion, J ... central axis

Claims (19)

An impeller rotatable around a central axis extending in one direction, a motor arranged on a radially inner side of the impeller and rotating the impeller around the central axis, a lead cable electrically connected to the motor, A motor support that supports the motor on one side in the axial direction of the impeller, a housing that is disposed radially outside the motor support, and surrounds the impeller and the motor in a circumferential direction; the motor support; A plurality of housing ribs that connect the housing, and a spacer that is fixed to one side in the axial direction of the housing and has a frame portion, and the lead cable is drawn from the motor to the outside in the radial direction, The surface on the other axial side of the frame portion is in contact with the surface on the one axial side of the housing, and the frame portion is A first recess recessed in one axial direction from a surface on the other axial side of the frame portion; the first recess has a first opening on a radially inner side surface of the frame portion; and An air blower disposed at a position overlapping the lead cable in the axial direction. The spacer includes an opposing portion that is axially opposed to a surface on one axial side of the motor support portion on a radially inner side of the frame portion, and connects the opposing portion and the frame portion, and is arranged along a circumferential direction. The air blower according to claim 1, comprising a plurality of spacer ribs arranged in The lead portion of the lead cable positioned between the facing portion and the frame portion when viewed in the axial direction overlaps with a gap between the spacer ribs adjacent in the circumferential direction in the axial direction. The blower described. Among the gaps between the spacer ribs adjacent to each other in the circumferential direction, the first gap overlapping with the lead-out portion is more circumferential than the other gaps except the first gap among the gaps between the spacer ribs adjacent in the circumferential direction. The air blower according to claim 3, wherein the size is large. The blower according to any one of claims 2 to 4, wherein the spacer rib has a blade shape having a wind receiving surface inclined with respect to the axial direction. A part of the spacer rib overlaps with the lead cable in the axial direction, and the spacer rib overlapped with the lead cable in the axial direction has a second recess recessed from the end on the other axial side of the spacer rib to the one axial side. The blower according to claim 2, wherein the second recess overlaps the lead cable in the axial direction. The said opposing part has a 3rd recessed part recessed in the axial direction one side from the surface of the other axial direction side of the said opposing part, The said 3rd recessed part has overlapped with the said lead cable and the axial direction. The air blower as described in any one of 1-6. The blower according to any one of claims 2 to 7, wherein the spacer has a pair of first wall portions extending from both circumferential edges of the first opening portion to the facing portion. The blower according to any one of claims 1 to 8, wherein the spacer has a protrusion protruding from an inner surface of the first recess. The blower according to any one of claims 1 to 9, wherein the first recess has a second opening on a radially outer surface of the frame portion. The blower according to claim 10, wherein the spacer has a protruding wall portion protruding from an edge portion of the second opening portion in a radially outer surface of the frame portion. The frame portion has a third wall portion facing the first opening portion through a gap, and the radially inner side surface of the third wall portion is a part of the inner side surface of the first recess. The air blower according to any one of claims 1 to 10. 13. The lead cable according to claim 1, wherein a part of the lead cable is disposed on one axial side of a surface on the one axial side of the housing and disposed in the first recess. The blower described in 1. The blower device according to claim 13, wherein the lead cable is in contact with a surface facing the other side in the axial direction of the inner surface of the first recess. The housing has a fourth recess that is recessed from one axial surface of the housing to the other axial side, and the fourth recess extends from a radially inner surface of the housing to a radially outer surface of the housing. Penetrating the housing, the first recess is opposed to the fourth recess in the axial direction, and the lead cable is drawn from the motor to the outside in the radial direction through the fourth recess. The air blower according to any one of claims 1 to 14. The cable guide further includes a cable guide that connects the motor support and the housing, and the cable guide extends along an extending direction in which the cable guide extends and opens at both ends of the cable guide in the extending direction. An opening on the housing side of the cable lead-out passage is connected to the fourth recess, and the lead cable is disposed radially outward from the housing via the cable lead-out passage and the fourth recess. The blower according to claim 15, wherein the blower is pulled out. The blower device according to claim 16, wherein the cable guide portion is one of a plurality of the housing ribs. The blower device according to any one of claims 1 to 17, wherein an inner side surface of the first recess has a shape along an outer side surface of the lead cable. The blower according to any one of claims 1 to 18, wherein a surface on one side in the circumferential direction of the inner surface of the first recess is inclined with respect to a surface orthogonal to the circumferential direction.

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