JP2004142735A - Blower motor device of vehicle and motor holder thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower motor device of a vehicle with excellent water proofing property. <P>SOLUTION: The blower motor device has a motor holder 1 and a blower motor 2 held by the holder 1. An air hole 26 is formed in the bottom part of the yoke 21 of the motor 2, and the inside of the yoke 21 and an intake port 13 are communicated via an air conduit 9. The holder 1 has a water proofing wall 15 projected in a cylindrical shape to surround the intake port 13. The inner surface of the water proofing wall 15b is formed closer to the holder body 5 than an inner surface out of the surfaces of the intake port 13 located inside of the holder 1 in a radial direction. The end surface of the wall 15 is projected below a first abutting part 27 in a vertical direction. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a blower motor device for a vehicle and a motor holder of the blower motor device for a vehicle.

Conventionally, a DC motor is used as a drive source in a blower motor device of a vehicle air conditioner. Since the blower motor device is continuously operated at a high output, frictional heat is generated due to the sliding contact between the brush and the commutator, and the temperature of the motor increases mainly around the brush and the commutator. For this reason, it is important from the viewpoint of product design and quality to suppress the heat generation of the motor in the vehicle air conditioner motor.

た め Therefore, Patent Document 1 discloses a blower motor device in which an air passage portion for sending cooling air into the motor is formed. The air passage communicates with a suction port formed at a predetermined position of the blower motor device and the inside of the motor, and guides cooling air taken in from the suction port to the inside of the motor.

However, in such a blower motor device, the suction port is open on the side, and the air guided into the motor is not sufficient for cooling the motor. For this reason, as shown in FIG. 5, it is conceivable to take in the cooling air into the motor by the rotation of the motor (actually, the rotation of the fan attached to the output shaft of the motor).

A motor holder 71 of this blower motor device includes a substantially disk-shaped connecting portion 72 formed on the opening side of the motor holder 71 and extending radially outward, and a plate 73 attached to a predetermined position on the lower surface side of the connecting portion 72. And A suction port 74 is formed in the connecting portion 72 so as to vertically penetrate therethrough. The plate 73 communicates with the upper portion of the connecting portion 72 via the suction port 74 and the inside of a main body housing a motor (not shown). It is attached to the lower surface side of the connecting portion 72. A cylindrical portion 75 extending upward from the opening end of the suction port 74 is formed on the upper surface of the connecting portion 72. The connecting portion 72 and the plate 73 form an air passage 76 for guiding air for cooling into the motor.

Further, in Patent Document 2, a blower path portion for sending cooling air into the motor is formed in the motor holder, and a lower case accommodating a drive circuit for controlling the motor is attached inside. Disclosed a blower motor device. In this blower motor device, a notch or a protrusion is provided at a boundary between the motor holder and the lower case, and water droplets that have entered the air passage at the notch or the protrusion are interposed between the motor holder and the lower case. Even when the boundary reaches the boundary, the water droplet traveling along the boundary toward the drive circuit is stopped to prevent the drive circuit from being wet by the water droplet.
JP-A-2002-204547 (pages 13-14, FIG. 1) JP-A-2000-316247 (FIGS. 1 and 2)

However, in the blower motor device disclosed in Patent Literature 1, water droplets such as car wash liquid may adhere to the inner peripheral surface of the cylindrical portion 75, and the water droplets may flow from the inner peripheral surface of the cylindrical portion 75 to the air path 76. There is a case where the connecting portion 72 and the plate 73 abut against each other along the inner surface. Then, there is a fear that the water droplets seep out of the motor holder 71 from the abutting portion 77 by a capillary phenomenon, that is, a so-called liquid leak occurs. In such a case, a problem occurs in that the liquid leaks from the motor holder 71 and the vehicle holder is flooded.

In addition, since the cooling air taken in from the suction port 74 has a good flowability and is guided into the motor, water drops such as car wash liquid reach the inside of the motor on the cooling air, which causes a malfunction of the motor. There was a risk of doing so.

Further, in the blower motor device disclosed in Patent Literature 2, the notch and the protrusion formed at the boundary between the motor holder and the lower case prevent water from being applied to the drive circuit, This allows the boundary between the lower case and the lower case to be reached, but does not prevent water droplets from reaching the boundary. Therefore, the blower motor device cannot prevent water from entering the vehicle interior. In addition, since the water droplet is allowed to reach the boundary between the motor holder and the lower case, in some cases, the water droplet may reach the drive circuit through the boundary.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle blower motor device having excellent waterproofness and a motor holder for the vehicle blower motor device.

In order to achieve the above object, the invention according to claim 1 includes a motor main body, a holder main body holding the motor main body inside, and a connecting portion extending radially outward from the holder main body. A plate fixed to the connecting portion and the holder main body, an upper portion of the suction opening formed by the holder main body, the connecting portion and the plate, and a suction opening formed in the connecting portion; And a blower passage for cooling the motor body by cooling air introduced from the suction port, the blower motor device for a vehicle, comprising: A waterproof portion is provided at a position for preventing liquid adhering to the suction port from moving to a gap matching portion between the plate, the connecting portion, and the holder body.

According to a second aspect of the present invention, in the first aspect of the present invention, a drive circuit for controlling the motor main body is housed inside the holder main body, and the waterproof section is provided at the suction port. The attached liquid is prevented from being transferred to the gap between the plate and the connecting portion and the holder main body, and moving to the drive circuit.

According to a third aspect of the present invention, in the first or second aspect, the waterproof portion is separated from the gap matching portion.
According to a fourth aspect of the present invention, in the first aspect of the present invention, the waterproof portion is formed by a waterproof wall surrounding the suction port.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the waterproof wall protrudes below the gap matching portion.
According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the holder wall of the waterproof wall is separated from the suction port.

The invention according to claim 7 is the invention according to any one of claims 1 to 3, wherein the waterproof portion is formed by a waterproof groove surrounding the suction port.
The invention according to claim 8 is such that the holder main body holding the motor main body inside, a connecting portion extending radially outward from the holder main body, and fixed to the connecting portion and the holder main body. Plate, the holder body portion, the connection portion, and the plate, the upper portion of the suction port and the inside of the bottom of the holder body portion communicate with each other through a suction port formed in the connection portion, A motor holder for a blower motor device for a vehicle, comprising: an air passage that cools the motor main body by cooling air introduced from the suction port; and a drive circuit housing that houses a drive circuit inside the holder main body. A waterproof portion is provided at a position below the suction port to prevent liquid adhering to the suction port from being transmitted to a gap matching portion between the plate, the connection portion, and the holder body portion, and to prevent the liquid from moving to the drive circuit side. It was.

(Action)
According to the first aspect of the invention, water droplets that have entered the air passage along the suction port do not reach the gap matching portion, and liquid leakage from between the motor holder and the plate is prevented.

According to the second aspect of the present invention, it is possible to prevent the drive circuit housed inside the holder main body from being wet.
According to the third aspect of the present invention, the water droplets whose movement has been stopped by the waterproof portion are more difficult to reach the gap matching portion, and the liquid leakage from between the motor holder and the plate is further reduced.

According to the fourth aspect of the present invention, the movement range of the water droplet is limited to the inside of the waterproof wall by the water droplet traveling along the waterproof wall, and the water droplet is prevented from reaching the gap matching portion formed outside the waterproof wall. Is done.

According to the fifth aspect of the present invention, by setting the mounting direction of the motor holder such that the waterproof wall protrudes from the gap matching portion in the direction of gravity, water droplets move along the waterproof wall and move in the direction of gravity from the gap matching portion. Is done. Therefore, since the water droplet does not reach the gap matching portion after that, the liquid leakage from the gap matching portion is further reduced.

According to the sixth aspect of the present invention, the cooling air taken in from the suction port flows toward the holder body. Therefore, the flow of the cooling air is blocked by the waterproof wall, but the effect is suppressed to a small extent.

According to the seventh aspect of the present invention, since the water droplet cannot cross the waterproof groove, the moving range of the water droplet is limited to the inside of the waterproof wall, and the water droplet moves to the gap matching portion formed outside the waterproof port. Reaching is suppressed.

According to the invention as set forth in claim 8, the water droplets that have entered the air passage along the suction port do not reach the gap matching portion, and are leaked from between the motor holder and the plate and are housed inside the holder main body. The drive circuit is prevented from being flooded.

According to the present invention, it is possible to provide a vehicle blower motor device excellent in waterproofness and a motor holder of the vehicle blower motor device.

An embodiment in which the present invention is embodied in a blower motor device for a vehicle will be described below with reference to FIGS.
As shown in FIG. 1, the blower motor device includes a motor holder 1 fixed to a vehicle (not shown), a blower motor 2 as a motor body held by the motor holder 1, and a fan fixed to a rotation shaft 3 of the blower motor 2. 4 is provided.

2A is a schematic plan view of the motor holder, FIG. 2B is a schematic side view of the motor holder, and FIG. 2C is a schematic perspective view of the plate.
The motor holder 1 is made of resin and includes a holder body 5, a connecting part 6, a fixing ring 7, and a plate 8. The holder main body 5 is formed in a substantially cylindrical shape with a bottom so as to hold the blower motor 2 inside thereof. The connecting portion 6 has a substantially disk shape extending radially outward from the holder main body 5 and is formed on the opening side of the holder main body 5. A plurality of holes 6 a penetrating in the axial direction are formed in the connecting portion 6, and air can be blown in the axial direction of the fan 4 when the fan 4 rotates. A fixed ring portion 7 is formed at the tip of the connecting portion 6.

プ レ ー ト A plate 8 is screwed to the outside of the holder body 5 in the radial direction at a predetermined angular position of the connecting portion 6. An air passage section 9 is formed by the holder body 5, the connecting section 6, and the plate 8. The blower passage 9 communicates the vicinity of the fan 4 with the inside of the holder main body 5 to guide air for cooling into the blower motor 2.

The plate 8 has a partition wall 40. The partition 40, the holder main body 5, and the connecting portion 6 define a housing chamber 41 as a drive circuit housing separated from the air passage 9. A circuit board 42 on which a drive circuit 42 a for controlling the blower motor 2 is mounted is housed in the housing chamber 41.

The connecting portion 6 protrudes radially outward at a portion in the circumferential direction, specifically, at a portion corresponding to the plate 8. In a portion of the connecting portion 6 corresponding to the plate 8, a concave portion 10 opening toward the plate 8 is formed so as to extend along the radial direction of the connecting portion 6. The concave portion 10 has an upper end wall 11 which is a part of the connecting portion 6 and a peripheral wall 12 which projects toward the plate 8 from three sides of the upper end wall 11, specifically, both sides of the upper end wall 11 and a radially outer end. And is defined by

The peripheral wall 12 includes a pair of side walls 12a located on both sides of the upper end wall 11 and extending in parallel with each other, and an end wall 12b connecting radially outer ends of both side walls 12a. The partition wall 30 extends from the upper end wall 11 toward the plate 8 so as to partition the concave portion 10 at a longitudinally intermediate portion of the concave portion 10. The partition wall 30 connects both side walls 12 a of the peripheral wall 12, and the lower end surface of the partition wall 30 is flush with the lower end surface of the peripheral wall 12.

As shown in FIG. 2A, a part of the connecting portion 6 protrudes radially outward, and the upper end wall 11 of the protruding portion is formed in the same direction (axial direction) as the opening of the holder body 5. An open suction port 13 is formed.

As shown in FIG. 1, the upper end wall 11 is formed with a cylindrical suction cylinder portion 14 extending upward and a waterproof wall 15 as a waterproof portion extending downward. The suction cylinder 14 extends upward from the open end of the suction port 13. The waterproof wall 15 protrudes downward in a cylindrical shape, and is formed at a position where the outer peripheral surface is sufficiently separated from the peripheral wall 12. The waterproof wall 15 is formed so as to surround the lower end of the opening of the suction port 13, and has a radially inner dimension larger than that of the suction port 13.

As shown in FIG. 3, the waterproof wall 15 has a waterproof wall 15a positioned radially outward (left side in the drawing) coincident with that of the suction cylinder portion 14, and a waterproof wall 15b positioned radially inward (right side in the drawing). The length is set to be closer to the motor by a length X than that of the cylindrical portion 14. The length X is set such that the air introduced from the inlet 13 hits the inner surface of the waterproof wall 15b. Accordingly, the force of the flow of the air guided from the suction port 13 toward the inside of the holder main body 5 is suppressed.

The axial length of the waterproof wall 15 is set such that the distal end surface of the waterproof wall 15 projects toward the plate 8 by a length Y from the end surface of the peripheral wall 12.
The plate 8 is formed in a substantially L-shape. More specifically, as shown in FIG. 2C, the plate 8 includes a peripheral wall 16 and a bottom wall 17 formed integrally with the peripheral wall 16. The peripheral wall 16 includes a pair of side walls 16a formed in an L shape and a pair of ends 16b connecting ends of the side walls 16a. The plate 8 opens toward the connecting portion 6 at a portion facing the connecting portion 6 and opens toward the holder main portion 5 at a portion facing the holder main portion 5. The distance between the side walls 16a is equal to the distance between the side walls 12a of the peripheral wall 12 in the connecting portion 6. The partition wall 40 is formed integrally with the side walls 16a so as to connect the both side walls 16a. The partition wall 40 includes a bottom wall 40a and a vertical wall 40b extending from one end of the bottom wall 40a so as to be orthogonal to the bottom wall 40a, and has an L-shape as a whole.

As shown in FIGS. 1 and 3, when the plate 8 is assembled to the holder main body 5 and the connecting part 6, the end face of the peripheral wall 16 of the plate 8 is connected to the end face of the peripheral wall 12 of the connecting part 6 and the holder main body 5. Abuts the outer surface of the Further, the end face of the vertical wall 40 b of the partition wall 40 provided on the plate 8 contacts the end face of the partition wall 30 of the connecting portion 6, and the end face of the bottom wall 40 a of the partition wall 40 contacts the outer surface of the holder body 5. As a result, the air passage section 9 and the accommodation chamber 41 are formed in a state where they are partitioned from each other. The contact portion between the plate 8 and the connecting portion 6 forms a first butting portion 27 as a gap matching portion, and the contact portion between the plate 8 and the holder body portion 5 forms a second butting portion 28.

(1) As shown in FIG. 1, the air passage section 9 is formed in a hollow substantially crank shape, and includes a first passage 18, a second passage 19, and a third passage 20. The first passage 18 is formed so as to extend radially outward of the holder main body 5 (perpendicular to the axial direction of the holder main body 5) while forming a part of the connecting part 6 and a part of the plate 8. The second passage 19 extends from the base end side of the first passage 18 to the bottom of the holder body 5 along the periphery while forming a part of the outer periphery of the holder body 5 and a part of the plate 8. Is formed. The third passage 20 is formed so as to extend from the distal end of the second passage 19 to a position covering the communication hole 5a, which will be described later, toward the axial center of the holder main body 5.

連 A communication hole 5a is formed at the predetermined angular position on the outer peripheral side of the bottom of the holder main body 5, and the inside of the air passage 9 and the inside of the holder main body 5 are communicated by the communication hole 5a. The suction port 13 communicates between the outside (above the suction port 13) and the inside of the air passage section 9. Therefore, the upper part of the suction port 13 is communicated with the inside of the holder main body 5 through the air passage 9 and the communication hole 5a.

The blower motor 2 is a DC motor and includes a bottomed cylindrical yoke 21, a rotating shaft 3 supported on the yoke 21, an armature core 22 and a commutator 23 fixed to the rotating shaft 3, and a commutator 23. And a pair of power supply brushes 24 slidably contacted. In the blower motor 2, a plurality of (for example, three) outer portions of the yoke 21 are screwed to the bottom portion of the holder main body 5 with screws 25 on an inner periphery of the yoke 21. And is supported by being press-fitted and supported via a convex rib (not shown). A blow hole 26 is formed at a position (the predetermined angular position) corresponding to the communication hole 5a (third passage 20) on the bottom of the yoke 21.

The fan 4 is fixed to the tip of the rotating shaft 3 protruding from the yoke 21 as shown by a two-dot chain line in FIG. The radius of the fan 4 of the present embodiment is set to be substantially the same as the length from the axis center of the holder main body 5 to the fixing ring 7. Further, the fan 4 of the present embodiment is a known fan, and when rotated, sucks the lower air and blows the air upward.

The circuit board 42 is fixed on the bottom wall 40 a of the partition wall 40 of the plate 8 so as to be located in the accommodation room 41. The drive circuit 42a mounted on the circuit board 42 includes a plurality of electric elements. Electric power is supplied to the blower motor 2 from outside the blower motor device through the drive circuit 42a. That is, the drive circuit 42 a supplies a current to the power supply brush 24, whereby a current flows from the power supply brush 24 to the armature core 22 via the commutator 23, and the armature core 22 rotates together with the rotating shaft 3. . Further, the drive circuit 42 a controls the current supplied to the blower motor 2 to adjust the rotation speed of the rotating shaft 3.

ブ ロ In the blower motor device configured as described above, the fixing ring portion 7 is fixed to a predetermined position of a vehicle (not shown), and is fixed so that the upper side in the drawing substantially coincides with the top direction when the blower motor device is used.

Next, the operation of the vehicle blower motor device configured as described above will be described.
When the fan 4 is rotated by driving the blower motor 2, the air below the fan 4 is sent upward. At this time, an air flow is formed below the fan 4 so as to pass through the hole 6a formed in the connecting portion 6 from below to above. The flow of air moving upward from below the fan 4 is also formed inside the holder main body 5. More specifically, air is guided to the inside of the holder main body 5 from the communication hole 5a formed below the holder main body 5, and moves inside the holder main body 5 in the axial direction, thereby moving the air downward. Is supplied.

The air moves in the gap between the holder body 5 and the yoke 21 or the inside of the yoke 21 in the axial direction when moving inside the holder body 5, and the air blows from the inner peripheral side and the outer peripheral side of the yoke 21 to the blower motor 2. The heat is absorbed. That is, when the fan 4 rotates, the air supplied to the holder main body 5 functions as cooling air that suppresses heat generation of the blower motor 2.

The cooling air that absorbs the heat of the blower motor 2 when the fan 4 rotates is supplied from the suction port 13 to the holder body 5 through the air passage 9. Therefore, when the fan 4 rotates, the flow of the cooling air flowing from the suction port 13 to the communication hole 5 a is generated in the air passage 9.

At this time, if water droplets such as a car wash liquid or water droplets as a liquid resulting from dew condensation adhere to the inner surface of the suction cylinder portion 14, the water droplets move downward due to gravity or the flow of air. However, since the waterproof wall 15 protrudes downward from the opening at the lower end of the suction port 13, the water droplets travel along the inner surface of the air passage 9, and the contact portion between the connecting portion 6 and the plate 8 (the first abutting portion 27). ) Is prevented. That is, the lower end of the waterproof wall 15 is located below the first butting portion 27. Therefore, the water droplets that have reached the lower end of the waterproof wall 15 along the inner surface of the suction cylinder portion 14 and the inner surface of the waterproof wall 15 are located below the first butting portion 27. Therefore, even if the water droplets at the lower end of the waterproof wall 15 are blown off by the flow of air in the air passage section 9, the water drops do not reach the first butting portion 27 located above itself.

As shown in FIG. 3, the inner surface of the waterproof wall 15 b located radially inward of the motor holder 1 is longer than the inner surface of the suction port 13 located radially inner of the motor holder 1 by a length X. Close to the holder body 5. Therefore, the air introduced from the suction port 13 into the inside of the waterproof wall 15 flows smoothly in the direction toward the holder body 5. However, the air collides with the inner surface of the waterproof wall 15b, thereby suppressing the momentum of the air flow. Therefore, even if the air is rushed in from the suction port 13, the stimulus of the air flow is suppressed, and the water droplet is suppressed from being carried into the holder main body 5 along the air flow. Further, moisture contained in the air collides with the inner surface of the waterproof wall 15b and adheres to the inner surface. Therefore, the introduction of air containing moisture into the holder main body 5 is also suppressed.

The length X and the axial length of the waterproof wall 15 are set so that the flow of air guided from the suction port 13 to the air passage 9 is not excessively obstructed. Therefore, although the air collides with the inner surface of the waterproof wall 15, the efficiency of taking in the air into the air passage section 9 does not excessively decrease, so that the cooling effect of the blower motor 2 does not have an adverse effect.

When the water droplet staying at the lower end of the waterproof wall 15 becomes large, the water droplet falls almost directly below the suction port 13. Since the water droplet is located in the downward direction, the water droplet does not reach the butting portion 27. Further, the distance from the position substantially directly below the suction port 13 to the second butting portion 28 is provided with a distance approximately equal to the radius of the fan 4, and is sufficient for water droplets to evaporate before reaching the second butting portion 28. Have a distance. Therefore, the water drops that have fallen on the plate 8 evaporate soon, so that the water drops do not reach the inside of the second butting portion 28 and the blower motor 2 along the inner peripheral surface of the plate 8.

(4) The waterproof wall 15 is formed sufficiently separated from the peripheral wall 12 of the connecting portion. Therefore, even when the water droplet staying at the lower end of the waterproof wall 15 is blown radially outward, the water droplet is dropped downward by gravity before reaching the position of the peripheral wall 12 and reaches the first butting portion 27. Is suppressed.

As described above, according to the present embodiment, the following effects are obtained.
(1) The waterproof wall 15 is formed so as to protrude from the motor holder 1 toward the air passage section 9 so as to surround the periphery of the suction port 13. Therefore, it is possible to limit the movement of water droplets reaching the air passage section 9 along the suction port 13 to the outside of the suction port 13 in the radial direction beyond the waterproof wall 15. It is possible to prevent water drops from reaching the first butting portion 27. For this reason, it is possible to prevent liquid leakage from the vehicle blower motor device due to a capillary phenomenon that occurs when a water droplet reaches the first butting portion 27. In addition, a situation does not occur in which a water drop reaches the inside of the storage chamber 41 along the first butting portion. Therefore, the circuit board 42 in the accommodation room 41 is prevented from being wet.

(2) The outer edge of the waterproof wall 15 is formed to be spaced from the peripheral wall 12 over the entire circumference. Therefore, it is possible to prevent water droplets blown from the lower end of the waterproof wall 15 to the outside in the radial direction of the waterproof wall 15 from reaching the first butting portion 27.

(3) The waterproof wall 15 protrudes from the first butting portion 27 in the direction of gravity. Therefore, it is possible to prevent water drops falling from the lower end of the waterproof wall 15 from reaching the first butting portion 27.

(4) The inner peripheral surface of the waterproof wall 15b is formed on the holder main body 5 side from the suction port 13 by a length X. By appropriately setting the protrusion amount and the length X of the waterproof wall 15b, it is possible to appropriately suppress the momentum of the air flow while suppressing the deterioration of the efficiency of taking in the air into the air passage section 9. Therefore, while the blower motor 2 is appropriately cooled, it is possible to suppress the transport of moisture to the inside of the holder main body 5 by the force of the air flow.

(5) A distance approximately equal to the radius of the fan 4 is provided from a position substantially directly below the suction port 13 to the second abutting portion 28, and water droplets that have fallen to a portion of the plate 8 substantially directly below the suction port 13 are It evaporates before it reaches the abutment 28. Therefore, a problem that occurs when a water droplet reaches the second butting portion 28, specifically, a phenomenon that the water droplet that has reached the second butting portion 28 leaks out of the motor holder 1 due to a capillary phenomenon does not occur. In addition, water droplets are prevented from entering the inside of the blower motor 2.

Note that the embodiment of the present invention may be modified as follows.
In the above-described embodiment, the waterproof wall 15 is formed as the waterproof portion so as to protrude from the motor holder 1 toward the air passage 9. However, a mechanism that can prevent water droplets from moving from the suction port 13 to the first butting portion 27 may be provided. For example, as shown in FIG. May be formed.

The waterproof groove 32 is formed in the motor holder 1a. The waterproof groove 32 is formed by cutting the end face of the motor holder 1a into a substantially ring shape so as to surround the periphery of the suction port 13. The waterproof groove 32 is formed apart from the first butting portion 27 in the radial direction of the waterproof groove 32.

As described above, when the waterproof groove 32 is employed as the waterproof portion, since the inner peripheral surface of the waterproof groove 32 is formed in the anti-gravity direction from the upper end wall 11, water droplets move radially outward beyond the waterproof groove 32. Nothing. Therefore, it is possible to prevent water droplets from reaching the first butting portion 27 which is spaced radially outward from the waterproof groove 32. For this reason, it is possible to prevent liquid leakage from the vehicle blower motor device due to a capillary phenomenon that occurs when a water droplet reaches the first butting portion 27.

In the above embodiment, the blower hole 2 is formed at the bottom of the yoke 21 of the blower motor 2, but the blower motor may not be formed with the blower hole 26. In this case, the cooling air is introduced between the inner peripheral side of the holder main body 5 and the outer peripheral side of the yoke 21. Therefore, the yoke 21 is cooled, and heat generation of the blower motor is suppressed.

In the above-described embodiment, the blower motor 2 is a DC motor including the power supply brush 24, but may be changed to another motor such as a brushless motor.
In the above-described embodiment, the shape of the suction port 13 is formed to be substantially semicircular in cross section, but the shape of the suction port 13 is not limited to this.

In the above-described embodiment, the side wall of the waterproof wall 15 has a cylindrical shape, but the present invention is not limited to this as long as the inlet 13 is surrounded from the outer periphery thereof.
In the above-described embodiment, the position of the inner peripheral surface of the waterproof wall 15b is set so as to be separated from the inner peripheral surface of the side wall of the suction port 13 that is located radially inside the motor holder 1 by the length X. It is set to affect the flow of air guided from the suction port 13 toward the inside of the holder main body 5. However, the length X may be changed as appropriate so that the flow of the air does not become too fast and the intake of the cooling air is not extremely hindered.

In the above embodiment, the lower end surface of the waterproof wall 15 is located below the first butting portion 27 by the length Y, but the length Y is such that water drops from the lower end of the waterproof wall 15 to the first butting portion 27. May be changed as appropriate within a range where cannot move.

In the above embodiment, the plate 8 is attached to the outside of the holder body 5 in the radial direction by screwing. However, the attachment method of the plate is not limited to this. The plates may be attached by fitting together.

In the above embodiment, the waterproof wall 15 is formed so that water droplets do not reach the first butting portion 27 formed by the connecting portion 6 and the plate 8 shown in FIGS. 1 and 2A to 2C. Was formed. However, any shape can be used as long as the suction port can be surrounded by the waterproof portion so that water droplets do not reach the abutting portion between the connecting portion and the plate. May be used other than those shown.

Sectional drawing of the principal part of a blower motor device. (A) is a schematic plan view of a motor holder, (b) is a schematic side view of a motor holder, and (c) is a schematic perspective view of a plate. FIG. 4 is a cross-sectional view near the suction port of the motor holder. Sectional drawing of the vicinity of the suction port of the motor holder of another example. Sectional drawing of the suction port of the conventional motor holder.

Explanation of reference numerals

1, 1a: motor holder, 2: blower motor as motor body, 4: fan, 5: holder body, 6: connecting part, 8: plate, 9: air passage, 13: suction port, 15: waterproof part Reference numeral 27 denotes a first abutting portion as a gap matching portion, 32 denotes a waterproof groove as a waterproof portion, 41 denotes a housing chamber as a drive circuit housing portion, and 42a denotes a drive circuit.

Claims (8)

A motor body,
A holder body that holds the motor body inside;
A connecting portion extending radially outward from the holder body,
A plate fixed to the connecting portion and the holder body,
The upper part of the suction port and the inside of the bottom part of the holder main part communicate with each other through a suction port formed in the connection part, and are formed by the holder main body part, the connection part, and the plate. An air passage that cools the motor body by the introduced cooling air;
A blower motor device for a vehicle comprising:
A vehicle provided with a waterproof portion at a position below the suction port for preventing liquid adhering to the suction port from moving to a gap matching portion between the plate, the connecting portion, and the holder body. Blower motor device. A drive circuit for controlling the motor main body is accommodated inside the holder main body, and the liquid adhering to the suction port is a gap between the plate, the connecting portion, and the holder main body. The blower motor device for a vehicle according to claim 1, wherein the blower motor device is prevented from being transferred to the driving circuit by being transmitted to the joining unit. The vehicle blower motor device according to claim 1, wherein the waterproof portion is separated from the gap matching portion. The vehicle blower motor device according to any one of claims 1 to 3, wherein the waterproof portion is formed by a waterproof wall surrounding the suction port. The blower motor device for a vehicle according to any one of claims 1 to 4, wherein the waterproof wall protrudes below the gap matching portion. 6. The blower motor device for a vehicle according to claim 1, wherein the waterproof wall has the holder main body side separated from the suction port. 7. The blower motor device for a vehicle according to any one of claims 1 to 3, wherein the waterproof portion is formed by a waterproof groove surrounding the suction port. A holder body for holding the motor body inside;
A connecting portion extending radially outward from the holder body,
A plate fixed to the connecting portion and the holder body,
The upper part of the suction port and the inside of the bottom part of the holder main part communicate with each other through a suction port formed in the connection part, and are formed by the holder main body part, the connection part, and the plate. An air passage that cools the motor body by the introduced cooling air;
A motor holder for a blower motor device for a vehicle, comprising: a drive circuit housing portion that houses a drive circuit inside the holder body.
A waterproof portion is provided at a position below the suction port to prevent liquid adhering to the suction port from being transmitted to a gap matching portion between the plate, the connection portion, and the holder body portion, thereby preventing the liquid from moving toward the drive circuit. A motor holder for a blower motor device for a vehicle, comprising:

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