JP2019052576A - Blower - Google Patents

Abstract

To provide a blower which can efficiency cool a driving source of a fan.SOLUTION: A blower includes: a motor having an output shaft; a fan 20 which has blades 22 and is rotationally driven by the motor; a shroud 30 having a cylindrical part 32, a wind guide part 35, and a motor attachment part 60; and a heat shielding plate 80 which is disposed closer to the positive pressure side during rotation of the fan 20 than the fan 20 and the motor. The heat shielding plate 80 includes: a main plate 81 having a radial inner part 85 overlapping with the motor when viewed in an axial direction and a radial outer part 86 which extends from the radial inner part 85 to the radial outer side relative to the cylindrical part 32; and a side wall 82 which extends from a side edge of the radial outer part 86 of a side edge of the main plate 81 to the blade 22 side along the axial direction. The side wall 82 includes a first side wall 82a which extends from a portion of the side edge of the radial outer part 86 which faces the rear side as seen in a rotation direction of the fan 20. The first side wall 82a is formed with a communication part 88 which allows communication in the rotation direction of the fan 20.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a blower.

  Conventionally, there is a blower that uses a cooling fan to cool a vehicle radiator. This type of blower cools the radiator by rotating the fan with the power of the drive source and sucking air through the radiator, for example (see, for example, Patent Document 1). Such an air blower may be arrange | positioned between a radiator and an engine. In this case, as described in Patent Document 1, in order to suppress the drive source from receiving heat from the engine and becoming high temperature, a heat shield plate that covers the drive source and blocks heat from the engine is provided. Provided.

Japanese Patent Laid-Open No. 2006-150640

  However, in order to suppress the drive source from becoming high temperature, it is desired not only to shield the drive source from the engine but also to actively cool the drive source.

  Therefore, the present invention provides a blower capable of efficiently cooling a fan drive source.

  The blower of the present invention has a drive source having an output shaft, a boss portion connected to the output shaft, and a blade formed to protrude outward from the boss portion in the radial direction of the output shaft, A fan that is rotationally driven by the drive source, a cylinder part in which a fan arrangement hole for arranging the fan is formed, an air guide part that guides air sucked by the fan toward the fan arrangement hole, and the output A shroud provided inside the fan arrangement hole as viewed from the axial direction of the shaft and having a drive source attachment portion to which the drive source is attached, and arranged on the positive pressure side of the fan and the drive source when the fan rotates A first member that overlaps with the drive source when viewed in the axial direction, and a first member that extends from the first member to the outer side in the radial direction than the cylindrical member. 2 parts A main body having a surface that intersects the axial direction and faces the blade, and of the side edges of the main body, the side of the second portion extends from the side edge of the second portion along the axial direction. A side wall portion extending to a rear side wall portion extending from a portion of the side edge of the second portion facing rearward in the rotational direction of the fan, and the rear side wall portion includes A communication portion communicating with the rotation direction of the fan is formed.

According to the present invention, the blower device includes the shielding member disposed on the positive pressure side during rotation of the fan relative to the driving source and the fan, and the shielding member has the first portion that overlaps the driving source when viewed from the axial direction. Since the main body is provided, the drive source can be shielded by the first portion of the main body of the shielding member when the engine is disposed on the positive pressure side of the blower.
Furthermore, the main body of the shielding member includes a second portion that extends radially outward from the first portion. Moreover, the shielding member is provided with the side wall part extended from the side edge of a 2nd part to the braid | blade side along an axial direction among the side edges of a main-body part. For this reason, air (wind) supplied from the rotating blade is received by the second portion of the main body, and the side wall suppresses the air received by the second portion from flowing out of the blade side space with respect to the second portion. However, the air received by the second portion can be guided by the side wall portion toward the drive source side space with respect to the first portion. Thereby, since air flows between a 1st part and a drive source, a drive source can be cooled.
Here, the air supplied from the rotating blade flows along a direction inclined with respect to the axial direction. Specifically, the air supplied from the rotating blade flows from the rear toward the front in the rotation direction of the fan as it is separated from the blade in the axial direction. In the present invention, the rear side wall portion is formed with a communication portion that communicates in the rotational direction of the fan. For this reason, the air supplied from the blade flows into the space surrounded by the second portion and the side wall portion of the main body portion through the communicating portion. Thereby, compared with the structure by which the communication part is not formed in the rear side wall part, air can be efficiently flowed toward the 1st part.
As described above, it is possible to provide a blower capable of efficiently cooling the fan drive source.

  In the above blower, the side wall portion includes a front side wall portion extending from a portion of the side edge of the second portion facing forward in the rotation direction of the fan, and the front side wall portion is formed of the fan. It is desirable that the radial direction is from the outer side toward the inner side as it goes from the rear to the front in the rotation direction.

  ADVANTAGE OF THE INVENTION According to this invention, the air which flows toward the front from the back in the rotation direction of a fan can be guide | induced toward a radial inside from the radial direction outer side, receiving by a front side wall part. Thereby, the air received by the second part can be efficiently guided toward the space on the drive source side with respect to the first part.

  In the above blower, the drive source mounting portion includes an inner cylinder portion that surrounds the periphery of the drive source from the outside in the radial direction, an outer cylinder portion that surrounds the inner cylinder portion from the outside in the radial direction, and the inner side It is desirable to include a plurality of spokes that connect between the cylindrical portion and the outer cylindrical portion, and a closing portion that closes between a pair of spokes adjacent in the circumferential direction of the output shaft.

  According to the present invention, the air between the first portion of the shielding member and the drive source is suppressed by the blocking portion, so that the air flows between the inner tube portion and the outer tube portion in the drive source mounting portion. It can suppress that the flow of is disturbed. Therefore, it can suppress that the cooling efficiency of a drive source falls.

  In the above blower, it is desirable that the closing portion is disposed at a position that does not overlap the second portion when viewed from the axial direction.

  When the air that flows between the first part and the drive source flows out from between the first part and the drive source, the second part of the periphery of the first part is not provided when viewed from the axial direction. Spill from. According to the present invention, it is possible to prevent the air flowing out from between the first portion and the drive source from joining the air flowing between the inner cylinder portion and the outer cylinder portion by the closing portion. Thereby, it can suppress that the flow of the air between the 1st part of a shielding member and a drive source deteriorates. Therefore, it can suppress that the cooling efficiency of a drive source falls.

  In the above blower, it is preferable that the drive source mounting portion includes an opening communicating with the second axial direction at a position overlapping the second portion when viewed from the axial direction.

  According to the present invention, air can flow into the blade side space with respect to the second portion of the main body portion of the shielding member through the opening, so that more air is directed toward the drive source side space with respect to the first portion. It can flow. Therefore, the drive source can be efficiently cooled.

  ADVANTAGE OF THE INVENTION According to this invention, the air blower which can cool the drive source of a fan efficiently can be provided.

It is a rear view which shows the air blower of embodiment. It is a perspective view which shows the motor and fan of embodiment. It is a perspective view which shows the air blower of embodiment. It is a perspective view which shows the air blower of embodiment. It is a rear view which shows the air blower of embodiment. It is sectional drawing in the VI-VI line of FIG. It is a rear view explaining the effect | action of the air blower of embodiment. It is explanatory drawing of an effect | action of the air blower of embodiment, Comprising: It is a schematic diagram which shows the VIII-VIII cross section of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the front / rear, up / down / left / right directions are the same as the front / rear, up / down, left / right directions in the vehicle unless otherwise specified. In the figure, arrow UP is upward, arrow FR is forward (forward in the traveling direction), and arrow LH is The left side is shown.

  The air blower 1 of embodiment is mounted, for example in the engine room of a motor vehicle, and cools a radiator. A radiator is arrange | positioned ahead of an engine in an engine room, and the air blower 1 is attached to the back of a radiator. Thereby, an air blower is arrange | positioned between a radiator and an engine.

FIG. 1 is a rear view of the air blower according to the embodiment as viewed from the rear.
As shown in FIG. 1, the blower 1 includes a motor 10 that is a drive source, a fan 20 that is rotationally driven by the motor 10, a shroud 30 that forms an outline of the blower 1 and is fixed to a radiator, and a motor. The heat shield plate 80 (shield member) that shields the heat from the engine 10 and the wire harness 90 connected to the motor 10 are provided. In the following description, the front, rear, top, bottom, left, and right directions are the same as the front, back, top, bottom, left, and right directions when the shroud 30 is fixed to the radiator (the shroud 30 is fixed).

FIG. 2 is a perspective view illustrating a motor and a fan according to the embodiment.
As shown in FIG. 2, the motor 10 includes a housing 11 that houses a stator and a rotor (not shown), an output shaft 12 that protrudes from the housing 11 (see FIG. 6), and a plurality (three in this embodiment) extending from the housing 11. ) And a motor connector 14 fixed to the housing 11. The housing 11 is formed in a cylindrical shape coaxial with the output shaft 12. The output shaft 12 extends in the front-rear direction and protrudes forward from the housing 11 (see FIG. 6). That is, the axial direction of the output shaft 12 coincides with the front-rear direction. The plurality of fastening portions 13 extend from the outer peripheral surface of the housing 11 along the radial direction of the output shaft 12 (hereinafter simply referred to as the radial direction). The plurality of fastening portions 13 are provided at equiangular intervals in the circumferential direction of the output shaft 12 (hereinafter simply referred to as the circumferential direction). Each fastening portion 13 is formed with an insertion hole through which a screw is inserted. The motor connector 14 is fixed to the rear end portion of the housing 11. The motor connector 14 projects leftward from the peripheral surface of the housing 11.

  The fan 20 is an axial fan. The fan 20 is rotationally driven by the motor 10. The fan 20 is driven to suck air through the radiator, and blows the sucked air toward the engine. The fan 20 is connected to the output shaft 12 of the motor 10 so as to be able to transmit power, and has a bottomed cylindrical boss portion 21, and the boss portion 21 integrally projects from the outer peripheral surface of the boss portion 21 outward in the radial direction. A plurality of (seven in this embodiment) blades 22 formed, and a cylindrical ring member 23 that connects the radially outer end regions of the plurality of blades 22 in a ring shape are provided. The boss portion 21 is provided coaxially with the output shaft 12 of the motor 10. The boss portion 21 opens rearward and accommodates the front end portion of the housing 11 of the motor 10 inside.

Each blade 22 inclines so that it may go ahead in the advancing direction of a vehicle as it goes to the front from the back in the rotation direction of the fan 20 shown by the arrow A in FIG. Therefore, the rear surface of the blade 22 is a positive pressure surface where the vicinity thereof becomes positive pressure when the fan 20 rotates, and the front surface of the blade 22 is a negative pressure surface where the vicinity portion becomes negative pressure when the fan 20 rotates. Yes.
The ring member 23 is annularly connected at a position offset radially inward from the radially outer end of the blade 22. The ring member 23 is provided coaxially with the output shaft 12 of the motor 10.

3 and 4 are perspective views showing the blower according to the embodiment.
As shown in FIGS. 3 and 4, the shroud 30 is provided so as to hold the motor 10 and cover the fan 20 from the outer peripheral side. The shroud 30 is a resin molded member, and is molded by injection molding using a mold. The shroud 30 includes a shroud main body 31 in which a fan arrangement hole 33 for disposing the fan 20 is formed, a radiator fixing portion 41 provided in the shroud main body 31 and fixed to the radiator, and provided in the shroud main body 31. The connector holding portion 48 for holding the connector 92, the main rib 50, the reinforcing rib 52 and the side wall rib 54 erected on the shroud main body 31, and the fan arrangement hole 33 viewed from the front-rear direction. A mounted motor mounting portion 60 (drive source mounting portion), a plurality of stays 70 that connect the shroud main body 31 and the motor mounting portion 60, and a plurality of heat shield plate mounting seats 72A to which a heat shield plate 80 is mounted. 72B, 72C.

As shown in FIG. 3, the shroud main body 31 includes a cylindrical portion 32 (tubular portion) and an air guide portion 35.
The cylindrical portion 32 is formed in a cylindrical shape coaxial with the output shaft 12 (see FIG. 6) of the motor 10. A fan arrangement hole 33 is formed inside the cylindrical portion 32. The fan arrangement hole 33 is formed in a circular shape when viewed from the front-rear direction. The cylindrical portion 32 surrounds the plurality of blades 22 of the fan 20.

  The air guide portion 35 guides the air sucked by the fan 20 toward the fan arrangement hole 33. The air guide portion 35 includes a flange portion 36 that projects outward from the front end edge of the cylindrical portion 32 in the radial direction, and a side wall portion 37 that extends forward from the outer edge of the flange portion 36. The flange portion 36 is formed, for example, in a shape corresponding to the shape of the radiator, and faces the radiator in the front-rear direction. As shown in FIG. 1, the upper end edge of the flange part 36 is extended along the left-right direction. The left and right side edges of the flange portion 36 extend in the vertical direction from the end of the upper end edge of the flange portion 36 downward. The lower end edge of the flange portion 36 extends in an arc shape concentric with the output shaft 12 (see FIG. 6) of the motor 10. The connecting portion between the lower end edge of the flange portion 36 and the left and right side edges is provided below the central axis of the output shaft 12 of the motor 10 and above the lower end of the cylindrical portion 32.

  As shown in FIGS. 3 and 4, the side wall portion 37 extends from the entire outer edge of the flange portion 36. That is, the side wall 37 includes an upper side wall 37a extending from the upper edge of the flange 36, a left side wall 37b extending from the left edge, a right side wall 37c extending from the right edge, and a lower side wall extending from the lower edge. 37d. The upper side wall 37a, the left side wall 37b, the right side wall 37c and the lower side wall 37d are connected to each other.

  As shown in FIG. 1, the radiator fixing portion 41 includes an upper fixing portion 42 provided on the upper portion of the shroud main body 31 and lower fixing portions 43 </ b> A and 43 </ b> B provided on the lower portion of the shroud main body 31.

  A pair of upper fixing portions 42 are provided with a space left and right. The upper fixing portion 42 protrudes upward from the flange portion 36. The upper fixing portion 42 is formed in a triangular shape when viewed from the front-rear direction so that the width in the left-right direction decreases from the bottom toward the top. The upper end portion of the upper fixing portion 42 is rounded when viewed from the front-rear direction. The upper fixing portion 42 is formed with insertion holes 42a through which bolts are inserted.

  The lower fixing portions 43A and 43B are provided with a space left and right. The lower fixing portions 43A and 43B are a left lower fixing portion 43A provided on the left side and a right lower fixing portion 43B provided on the right side. The lower fixing portions 43A and 43B include a boss 44 provided at the lower end and projecting downward, and a connecting portion 45 that connects the boss 44 to a lower side wall portion 37d (see FIG. 3) of the air guide portion 35. .

  As shown in FIG. 3, the connecting portion 45 of each of the lower fixing portions 43A and 43B is formed by a plurality of flat members extending from the lower side wall portion 37d. Specifically, the connecting portion 45 of the lower left fixed portion 43A includes a first member 45a, a second member 45b, a third member 45c, a fourth member 45d, and a fifth member 45e. The first member 45a extends upward from the boss 44 along the vertical direction and is connected to the lower side wall portion 37d. The second member 45b extends rightward and upward from the boss 44, and is connected to the lower end portion of the lower side wall portion 37d. The third member 45c extends leftward and upward from the boss 44, and is connected to a connection portion between the lower sidewall portion 37d and the left sidewall portion 37b (see FIG. 4). The fourth member 45d extends from the intermediate portion of the first member 45a to the left and right sides along the left-right direction. The fourth member 45d is connected to the third member 45c at the left end and is connected to the lower side wall 37d at the right end. The fifth member 45e extends to the right along the left-right direction from the middle part of the third member 45c above the fourth member 45d, and is connected to the lower side wall part 37d.

  The connecting portion 45 of the lower right fixing portion 43B includes a first member 45f, a second member 45g, a third member 45h, a fourth member 45i, a fifth member 45j, and a sixth member 45k. Yes. The first member 45f extends upward along the vertical direction from the boss 44, and is connected to the lower side wall portion 37d. The second member 45g extends leftward and upward from the boss 44, and is connected to the lower end portion of the lower side wall portion 37d. The third member 45h extends rightward and upward from the boss 44, and is connected to a connection portion between the lower sidewall portion 37d and the right sidewall portion 37c. The fourth member 45i extends from the intermediate portion of the first member 45f to the left and right sides along the left-right direction. The fourth member 45i is connected to the third member 45h at the right end and is connected to the lower side wall 37d at the left end. The fifth member 45j extends from the middle portion of the third member 45h to the left and right sides along the left-right direction above the fourth member 45i. The fifth member 45j is connected to the third member 45h at the right end and is connected to the lower side wall 37d at the left end. The sixth member 45k extends to the upper and lower sides along the vertical direction from the fourth member 45i on the left side of the first member 45f. The sixth member 45k is connected to the second member 45g at the lower end and is connected to the lower side wall 37d at the upper end.

  As shown in FIG. 4, the connector holding part 48 is provided on the side surface of the connecting part 45 of the left lower fixing part 43A. The connector holding portion 48 is formed in a rectangular parallelepiped box shape. The connector holding part 48 protrudes radially outward from the third member 45c of the connecting part 45 of the left lower fixing part 43A.

  As shown in FIG. 1, a plurality of main ribs 50 are provided. The main rib 50 is erected across the outer peripheral surface of the cylindrical portion 32 and the rear surface of the flange portion 36. The main ribs 50 extend radially from the cylindrical portion 32 along the radial direction. The main rib 50 is provided more than the stay 70.

  As shown in FIG. 4, a plurality of (three in this embodiment) reinforcing ribs 52 are provided for each upper fixing portion 42. The reinforcing rib 52 is erected across the rear surface of the flange portion 36 and the rear surface of the upper fixing portion 42. Each reinforcing rib 52 extends linearly. At least one of the reinforcing ribs 52 is connected to the radially inner end of the main rib 50 at the radially inner end.

  The side wall rib 54 is erected on the upper side wall portion 37a. The side wall ribs 54 extend in the left-right direction and are connected to the left and right ends of each upper fixing portion 42.

FIG. 5 is a rear view illustrating the blower according to the embodiment. FIG. 5 shows a state where the heat shield plate 80 is removed.
As shown in FIG. 5, the motor mounting portion 60 is formed so as to surround the motor 10. The motor 10 is fastened and fixed to the motor mounting portion 60. The motor mounting portion 60 includes an inner cylindrical portion 61 that surrounds the rear end portion of the housing 11 of the motor 10 from the outer side in the radial direction, an outer cylindrical portion 62 that surrounds the inner cylindrical portion 61 from the outer side in the radial direction, and an inner cylindrical portion 61. A plurality of spokes 63 that connect the outer cylinder portion 62, a motor mounting seat 64 to which the motor 10 is attached, and a closing portion 67 that closes a pair of spokes 63 adjacent in the circumferential direction are provided.

6 is a cross-sectional view taken along line VI-VI in FIG.
As shown in FIGS. 5 and 6, the inner cylinder portion 61 is formed in a cylindrical shape coaxial with the output shaft 12 of the motor 10. The inner cylinder portion 61 surrounds the rear end portion of the housing 11 of the motor 10. That is, the inner cylinder portion 61 surrounds the housing 11 of the motor 10 behind the boss portion 21 of the fan 20. The inner cylindrical portion 61 is provided with a diameter-expanded portion 61 a that expands so as to avoid the motor connector 14 of the motor 10 at a position overlapping the motor connector 14 of the motor 10 in the circumferential direction.

  The inner cylinder portion 61 includes a top wall portion 61b that covers the entire motor 10 in the left-right direction from above. The top wall part 61 b is the upper half part of the inner cylinder part 61. The rear end edge 61c of the top wall portion 61b is located rearward (positive pressure side) of the housing 11 of the motor 10. The state in which the rear end edge 61c of the top wall portion 61b is located behind the housing 11 of the motor 10 is such that the rear end edge 61c of the top wall portion 61b matches the rear end of the housing 11 of the motor 10 in the front-rear direction. Including state. That is, the top wall portion 61b overlaps the entire rear end of the housing 11 of the motor 10 when viewed from the vertical direction. In the present embodiment, the rear end edge 61 c of the top wall portion 61 b is formed at a position that coincides with the rear end of the housing 11 of the motor 10 in the front-rear direction, and the rear end edge of the lower half portion of the inner cylinder portion 61 is the motor 10. It is formed so as to be positioned in front of the rear end of the housing 11. The front end edge of the inner cylinder part 61 is formed in the same position in the front-back direction over the entire circumference.

  The outer cylinder part 62 is formed in a cylindrical shape having a larger diameter than the inner cylinder part 61 and coaxial with the output shaft 12 of the motor 10. The outer cylinder part 62 is arranged with a gap in the radial direction with respect to the inner cylinder part 61. The front end edge of the outer cylinder part 62 is formed at the same position in the front-rear direction as the front end edge of the inner cylinder part 61 over the entire circumference. The rear end edge of the outer cylinder part 62 is formed at the same position in the front-rear direction as the rear end edge 61c of the top wall part 61b of the inner cylinder part 61 over the entire circumference.

  As shown in FIG. 5, the plurality of spokes 63 are formed in a plate shape extending in the front-rear direction. The plurality of spokes 63 are connected to the outer peripheral surface of the inner cylindrical portion 61 and the inner peripheral surface of the outer cylindrical portion 62, respectively. The plurality of spokes 63 are arranged such that at least a part thereof is separated from the adjacent spokes 63.

  As shown in FIG. 6, the end face of each spoke 63 facing forward is formed at the same position as the front end edges of the inner cylinder part 61 and the outer cylinder part 62 in the front-rear direction. Of the end faces facing the rear of each spoke 63, the radially inner end is formed at the same position as the rear end edge of the lower half of the inner cylindrical portion 61 in the front-rear direction. Of the end faces facing the rear of each spoke 63, the radially outer end is formed at the same position as the rear end edge of the outer cylindrical portion 62 in the front-rear direction. Thereby, the spoke 63 is formed so that the dimension in the front-rear direction gradually increases from the inner side to the outer side in the radial direction.

  As shown in FIG. 5, the motor mounting seats 64 are provided in the same number (three in the present embodiment) as the plurality of fastening portions 13 (see FIG. 2) of the motor 10. Each motor mounting seat 64 is provided at a position corresponding to the plurality of fastening portions 13 of the motor 10. Each motor mounting seat 64 is connected to the inner cylinder part 61 and the outer cylinder part 62. Each motor mounting seat 64 is formed so as to fill a space between a pair of spokes 63 adjacent in the circumferential direction when viewed from the front-rear direction. A fastening portion 13 of the motor 10 is disposed on each motor mounting seat 64 from the front, and is fastened and fixed by screws.

  A plurality of blocking portions 67 are provided. Each blocking part 67 is formed in a flat plate shape extending perpendicularly to the front-rear direction (see FIG. 6). Each obstruction | occlusion part 67 interrupts | blocks the communication of the front-back direction between a pair of spokes 63 adjacent in the circumferential direction. The location where the blocking portion 67 is provided will be described later.

  The plurality of stays 70 extend radially from the outer cylindrical portion 62 of the motor mounting portion 60 along the radial direction. The radially outer end of each stay 70 is connected to the radially inner end of the main rib 50 of the shroud body 31.

  As shown in FIGS. 3 and 4, the plurality of heat shield plate mounting seats 72 </ b> A, 72 </ b> B, 72 </ b> C are provided in the shroud main body 31 and the motor mounting portion 60. The plurality of heat shield plate mounting seats 72A, 72B, 72C include a first mounting seat 72A provided in the shroud body 31, and a second mounting seat 72B and a third mounting seat 72C provided in the motor mounting portion 60. is there. The plurality of heat shield plate mounting seats 72A, 72B, 72C are formed in a cylindrical shape protruding rearward. The plurality of heat shield plate mounting seats 72 </ b> A, 72 </ b> B, 72 </ b> C are respectively provided at positions corresponding to the heat shield plate fixing portion 83 described later of the heat shield plate 80.

  As shown in FIG. 1, the heat shield plate 80 is arranged so as to cover a part of the fan arrangement hole 33 of the shroud main body 31 and at least a part of the motor 10 from the rear. The heat shield plate 80 is formed from a single metal plate, for example, by press molding or the like. The heat shield plate 80 is fixed to the main plate 81 (main body portion) facing the fan 20 in the front-rear direction, the side wall 82 (side wall portion) extending forward from a part of the outer edge of the main plate 81, and the shroud 30. And a heat shield fixing part 83.

  The main plate 81 is formed in a flat plate shape extending perpendicular to the front-rear direction. The main plate 81 is formed with a front surface 81 b (see FIG. 7) that is orthogonal to the front-rear direction and faces the blade 22 of the fan 20. The main plate 81 includes a radially inner portion 85 (first portion) that overlaps the motor 10 when viewed from the front-rear direction, and a radially outer portion 86 that extends from the radially inner portion 85 to the outside of the cylindrical portion 32 of the shroud body 31 along a predetermined radial direction. 2nd part). The boundary between the inner diameter 85 and the outer diameter 86 coincides with the inner peripheral surface of the inner cylindrical portion 61 of the motor mounting portion 60 as viewed from the front-rear direction. The main plate 81 is provided with a plurality of beads 81a. The plurality of beads 81 a extend in parallel to each other along the predetermined radial direction over the inner diameter 85 and the outer diameter 86.

  The inner diameter 85 is formed so as to cover most of the motor 10 when viewed from the front-rear direction. The inner diameter 85 shields the motor 10 from the engine disposed behind the blower 1. The upper portion of the radial inner portion 85 protrudes to a position radially outside the inner peripheral surface of the inner cylindrical portion 61 and radially inner than the outer cylindrical portion 62 when viewed from the front-rear direction. The lower right portion of the inner diameter portion 85 is formed so as to expose the inner side of the inner cylindrical portion 61 when viewed from the front-rear direction.

  The outer diameter 86 blocks the flow of the air sent by the fan 20 in the front-rear direction at a position behind the fan 20 (positive pressure side). The radially outer portion 86 includes both side edges 86 a and 86 c extending along the predetermined radial direction, and a leading edge 86 b that connects the both side edges 86 a and 86 c at the distal end of the radially outer portion 86. Both side edges 86a and 86c are a rear side edge 86a facing rearward in the rotational direction of the fan 20 (direction indicated by arrow A in the figure) and a front side edge 86c facing forward in the rotational direction of the fan 20. The rear edge 86a extends toward the front in the rotational direction of the fan 20 from the inner side to the outer side in the radial direction. The front edge 86c extends toward the rear in the rotational direction as it goes from the inner side to the outer side in the radial direction. The leading edge 86b connects the radially outer end of the rear edge 86a and the radially outer end of the front edge 86c. The leading edge 86b extends along a direction substantially orthogonal to the predetermined radial direction. The leading edge 86 b is disposed outside the fan arrangement hole 33 of the shroud main body 31.

  As shown in FIGS. 3 and 4, the side wall 82 extends forward from the outer edge of the outer diameter 86 along the front-rear direction. Thereby, the side wall 82 suppresses the wind received by the main plate 81 from flowing out of the space in front of the main plate 81. The side wall 82 includes a first side wall 82 a (rear side wall portion) extending from the rear edge 86 a of the outer diameter 86, a second side wall 82 b extending from the entire leading edge 86 b of the outer diameter 86, and a front edge 86 c of the outer diameter 86. And a third side wall 82c (front side wall part) extending from the whole.

  The first side wall 82a extends from a location extending from the radially intermediate portion to the radially inner end of the rear edge 86a of the radially outer portion 86a. An end portion on the radially outer side of the first side wall 82 a is provided on the outer side in the radial direction with respect to the outer cylindrical portion 62 of the motor mounting portion 60. The second side wall 82b and the third side wall 82c are connected to each other. The third side wall 82c follows the shape of the front edge 86c of the radially outer portion 86, and is directed from the radially outer side to the radially inner side as it goes from the rear to the front in the rotation direction of the fan 20.

  With such a configuration, the heat shield plate 80 has a portion where the side wall 82 is not provided on the rear side of the main plate 81 in the rotation direction of the fan 20. In other words, the first side wall 82 a is formed with a communicating portion 88 that is a notch and communicates with the rotation direction of the fan 20.

  The heat shield plate fixing portion 83 includes a first heat shield plate fixing portion 83a fixed to the shroud body 31, a second heat shield plate fixing portion 83b and a third heat shield plate fixing portion 83c fixed to the motor mounting portion 60. And. The heat shield plate fixing portion 83 extends forward from the side edge of the main plate 81 and then projects outward in the radial direction. The heat shield fixing part 83 is formed with an insertion hole through which a screw is inserted. The first heat shield plate fixing portion 83 a is provided at the radially outer end of the radially outer portion 86. A part of the first heat shield fixing part 83a is shared with the second side wall 82b. The first heat shield fixing part 83 a is fastened and fixed to a first mounting seat 72 </ b> A provided in the shroud main body 31. The second heat shield plate fixing portion 83b is provided at the end of the heat shield plate 80 opposite to the first heat shield plate fixing portion 83a. The second heat shield plate fixing portion 83b is the motor mounting portion 60. It is fastened and fixed to the second mounting seat 72B provided in the. The third heat shield fixing portion 83 c is provided at the radially inner end of the radially outer portion 86. A part of the third heat shield fixing part 83c is shared with the first side wall 82a. The third heat shield fixing part 83c is fastened and fixed to a third attachment seat 72C provided in the motor attachment part 60.

  As shown in FIG. 5, in the wire harness 90, the connector 91 at one end is connected to the motor connector 14 of the motor 10, and the connector 92 at the other end is held by the connector holding portion 48 (see FIG. 4). The wire harness 90 is disposed between the inner cylinder portion 61 and the outer cylinder portion 62 of the motor mounting portion 60 in order from one end portion to the other end portion, and then the heat shield plate 80 (see FIG. 1), and extends outward in the radial direction while being held by a stay 70 provided at a position overlapping with that of FIG.

Here, the position of the closing portion 67 of the motor mounting portion 60 will be described in detail.
As shown in FIGS. 1 and 5, the blocking portion 67 is provided at a position that does not overlap with the outer diameter 86 of the main plate 81 of the heat shield plate 80 when viewed from the front-rear direction. That is, the blocking portion 67 is not provided at a position overlapping the outer diameter 86 of the main plate 81 of the heat shield plate 80 when viewed from the front-rear direction. Thereby, the motor mounting part 60 is provided with the opening part 65 connected in the front-back direction in the position which overlaps with the diameter outside 86 of the main plate 81 of the heat shield 80 seeing from the front-back direction. The opening 65 is a portion sandwiched between spokes 63 adjacent in the circumferential direction.

Next, the effect | action of the air blower 1 of this embodiment is demonstrated.
The blower device 1 includes a heat shield plate 80 disposed behind the motor 10 and the fan 20. Since the heat shield plate 80 includes a main plate 81 having a diameter inside 85 that overlaps with the motor 10 when viewed from the front-rear direction, the main plate 81 of the heat shield plate 80 is disposed when the engine is disposed behind the blower 1. The motor 10 can be insulated by the inner diameter 85.

FIG. 7 is a rear view for explaining the operation of the blower according to the embodiment. In FIG. 7, the heat shield plate 80 is indicated by a virtual line.
As shown in FIG. 7, in the blower 1, by rotating the fan 20, the wind flows from the front to the rear inside the fan arrangement hole 33. The main plate 81 of the heat shield plate 80 includes a radially outer portion 86 that extends radially outward from the radially inner portion 85. The heat shield plate 80 includes a side wall 82 that extends from the side edge of the outer diameter 86 to the blade 22 side (forward) along the front-rear direction among the side edges of the main plate 81. Therefore, air (wind) supplied from the rotating blade 22 is received by the outer diameter 86 of the main plate 81, and the side wall 82 indicates that the air received by the outer diameter 86 flows out from the space on the blade 22 side with respect to the outer diameter 86. Thus, the air received by the outer diameter 86 can be guided by the side wall 82 toward the space on the motor 10 side (front) with respect to the inner diameter 85. Thereby, since air flows between the diameter inside 85 and the motor 10, the motor 10 can be cooled.

FIG. 8 is an explanatory diagram of the operation of the blower according to the embodiment, and is a schematic diagram illustrating a section VIII-VIII in FIG. 7.
Here, as shown in FIG. 8, the air supplied from the rotating blade 22 flows along a direction inclined with respect to the front-rear direction. Specifically, as the air supplied from the rotating blade 22 moves away from the blade 22 along the front-rear direction, the air is directed from the rear to the front in the rotation direction of the fan 20 (the direction indicated by the arrow A in the drawing). Flowing. In the present embodiment, the first side wall 82 a is formed with a communication portion 88 that communicates with the rotation direction of the fan 20. For this reason, the air supplied from the blade 22 flows into the space surrounded by the main plate 81 and the side wall 82 through the communication portion 88. Thereby, compared with the structure in which the communicating part is not formed on the first side wall, the air can be efficiently flowed toward the inner diameter 85.
As described above, the blower 1 that can efficiently cool the motor 10 can be provided.

  Further, the third side wall 82 c is directed from the radially outer side to the radially inner side as it goes from the rear to the front in the rotation direction of the fan 20. According to this configuration, the air flowing from the rear to the front in the rotation direction of the fan 20 can be guided from the radially outer side to the radially inner side while being received by the third side wall 82c. Thereby, the air received by the outer diameter 86 can be efficiently guided toward the space on the motor 10 side with respect to the inner diameter 85.

  In addition, the motor mounting portion 60 includes a plurality of spokes 63 that connect between the inner cylinder portion 61 and the outer cylinder portion 62, and a blocking portion 67 that blocks between a pair of spokes 63 adjacent in the circumferential direction. . According to this configuration, the air flow between the inner cylinder portion 61 and the outer cylinder portion 62 in the motor mounting portion 60 is suppressed by the closing portion 67, and the inner diameter 85 of the heat shield plate 80 and the motor 10 are suppressed. It can suppress that the flow of the air between is disturbed. Therefore, it can suppress that the cooling efficiency of the motor 10 falls.

  Further, the blocking portion 67 is disposed at a position that does not overlap the outer diameter 86 when viewed from the front-rear direction. According to this configuration, when the air flowing between the inner diameter 85 and the motor 10 flows out from between the inner diameter 85 and the motor 10, the outer diameter 86 of the circumference of the inner diameter 85 as viewed from the front-rear direction. Flows out of the area where no. According to the present embodiment, the blocking portion 67 can prevent the air flowing out between the inside diameter 85 and the motor 10 from joining the air flowing between the inner cylinder portion 61 and the outer cylinder portion 62. Thereby, it can suppress that the flow of the air between the diameter inside 85 of the heat shield 80 and the motor 10 deteriorates. Therefore, it can suppress that the cooling efficiency of the motor 10 falls.

  The motor mounting portion 60 includes an opening 65 that communicates with the front-rear direction at a position overlapping the outer diameter 86 when viewed from the front-rear direction. According to this configuration, air can be caused to flow into the space on the blade 22 side with respect to the outer diameter 86 of the main plate 81 of the heat shield plate 80 through the opening 65, and therefore toward the space on the motor 10 side with respect to the inner diameter 85. More air can flow. Therefore, the motor 10 can be efficiently cooled.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the said embodiment, although the air blower is used for cooling of a radiator, the air blower concerning this invention is not limited for radiator cooling, You may cool other apparatuses. .

Moreover, in the said embodiment, although the communication part 88 formed in the 1st side wall 82a is a notch, it is not limited to this, The through-hole formed in the 1st side wall may be sufficient as a communication part.
Moreover, in the said embodiment, although the front surface 81b orthogonal to the front-back direction is formed in the main plate 81 of the heat shield 80, it is not limited to this. It is sufficient that the main plate of the heat shield plate has a surface that intersects with the front-rear direction and faces the blade 22 of the fan 20 so that the air supplied from the fan 20 can be received.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Air blower 10 ... Motor (drive source) 12 ... Output shaft 20 ... Fan 21 ... Boss part 22 ... Blade 30 ... Shroud 32 ... Cylindrical part (cylinder part) 35 ... Air guide part 33 ... Fan arrangement hole 60 ... Motor attachment Part (drive source mounting part) 61 ... Inner cylinder part 61b ... Ceiling wall part 62 ... Outer cylinder part 63 ... Spoke 65 ... Opening part 67 ... Clogging part 80 ... Heat shield (shielding member) 81 ... Main plate (main part) 82 ... Side wall (side wall part) 82a ... First side wall (rear side wall part) 82c ... Third side wall (front side wall part) 85 ... Diameter inside (first part) 86 ... Diameter outside (second part) 88 ... Communication part

Claims (5)

A drive source having an output shaft;
A boss portion connected to the output shaft, and a fan that is formed to protrude from the boss portion toward the outside in the radial direction of the output shaft, and a fan that is rotationally driven by the drive source;
The cylinder part in which the fan arrangement | positioning hole which arrange | positions the said fan was formed, the air guide part which guides the air inhaled by the said fan toward the said fan arrangement | positioning hole, and the said fan arrangement | positioning hole seeing from the axial direction of the said output shaft A shroud having a drive source mounting portion provided inside the drive source to which the drive source is mounted;
A shielding member disposed on the positive pressure side during rotation of the fan relative to the fan and the drive source;
With
The shielding member is
A first portion that overlaps the drive source when viewed from the axial direction, and a second portion that extends from the first portion to the outside in the radial direction from the cylindrical portion, and intersects the axial direction and A main body formed with a surface facing the blade;
Of the side edges of the main body, side walls extending from the side edges of the second part to the blade side along the axial direction;
With
The side wall portion includes a rear side wall portion extending from a position facing the rear in the rotation direction of the fan at a side edge of the second portion,
The rear side wall portion is formed with a communication portion that communicates in the rotational direction of the fan.
A blower characterized by that. The side wall portion includes a front side wall portion extending from a portion of the side edge of the second portion facing forward in the rotational direction of the fan,
The front side wall portion is directed from the outside in the radial direction toward the inside as it goes from the rear to the front in the rotation direction of the fan.
The blower according to claim 1. The drive source mounting portion is
An inner cylinder that surrounds the drive source from outside in the radial direction;
An outer cylinder that surrounds the inner cylinder from the outside in the radial direction;
A plurality of spokes connecting between the inner cylinder part and the outer cylinder part;
A closing portion that closes a pair of spokes adjacent in the circumferential direction of the output shaft;
Comprising
The air blower according to claim 1 or 2, wherein The blocking portion is disposed at a position that does not overlap the second portion when viewed from the axial direction.
The blower according to claim 3. The drive source mounting portion includes an opening communicating with the axial direction at a position overlapping the second portion when viewed from the axial direction.
The air blower according to claim 3 or 4, characterized in that.

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