JP3698488B2 - Motor for driving blower fan of air conditioner for automobile - Google Patents

Description

[0001]
[Industrial application fields]
The motor for driving a blower fan of an automotive air conditioner according to the present invention is used to rotationally drive a blower fan of an automotive air conditioner that performs cooling and heating in a vehicle interior.
[0002]
[Prior art]
An automotive air conditioner is configured by arranging a blower fan at the upstream end of a duct in which an evaporator for cooling air and a heater core for heating are arranged. And, after adjusting the air taken from the vehicle interior or the exterior of the vehicle through the intake port provided at the upstream end of the duct to a desired temperature by the evaporator and the heater core, from the air outlet provided at the downstream end of the duct, Blow out into the passenger compartment.
[0003]
A centrifugal multiblade fan is generally used as the blower fan, and the centrifugal multiblade fan is rotationally driven by a motor. Such a motor for driving a blower fan has a cylindrical case body, and a stator is supported and fixed on the inner peripheral surface of the case body. The lower end plate is fixed to the lower end opening of the case body, and the upper end plate is fixed to the upper end opening. As such a blower fan driving motor, for example, there is one having a structure disclosed in Japanese Patent Application No. 7-329096. 3 to 6 show the blower fan driving motor disclosed in this application.
[0004]
This motor has a case main body 1 made of an iron-based magnetic material or the like in a cylindrical shape. In a state where the motor is incorporated in an automobile air conditioner, the case body 1 is arranged in the vertical direction or a direction close thereto. A stator 2 (permanent magnet) is supported and fixed at an intermediate portion of the inner peripheral surface of the case body 1. Further, the lower end plate 3 is fixed to the lower end opening of the case body 1 by an appropriate fixing means that has been conventionally known. As shown in FIG. 5, the lower end plate 3 has a width dimension smaller than the diameter of the case body 1. Such a lower end plate 3 is arranged in the diameter direction at the lower end opening of the case main body 1, and both end portions in the length direction are coupled to the lower end of the case main body 1, thereby It is supported and fixed at the lower end opening. Therefore, a pair of air supply gaps 4 are formed between both side edges in the width direction of the lower end plate 3 and the lower end opening of the case body 1. On the other hand, the upper end plate 5 is fixed to the upper end opening of the case body 1 by an appropriate fixing means that is also well known in the art. The upper end plate 5 is formed in a round bowl shape as a whole, and has an outer diameter dimension that can completely cover the upper end opening of the case body 1.
[0005]
A rotation drive shaft 6 is inserted through the central portion of the case body 1. The lower end of the rotary drive shaft 6 is rotatably supported at the center of the lower end plate 3 by a lower slide bearing 7 which is a lower bearing. Further, a portion near the upper end of the intermediate portion of the rotary drive shaft 6 is rotatably supported at the center of the upper end plate 5 by an upper slide bearing 8 which is an upper bearing. A rotor 9 is fixed to a portion that is located between the sliding bearings 7 and 8 at an intermediate portion of the rotary drive shaft 6 and that faces the inner peripheral surface of the stator 2. A commutator 10 for energizing a coil constituting the rotor 9 is fixed to an intermediate portion of the rotary drive shaft 6 between the rotor 9 and the upper end plate 5.
[0006]
On the other hand, a brush substrate 11 formed in an annular shape with an insulating material such as synthetic resin is fixed between the upper end plate 5 and the commutator 10 near the inner upper end of the case body 1. The brush substrate 11 includes an annular substrate portion 12 and leg pieces 13 provided at a plurality of locations on the outer peripheral edge of the substrate portion 12. The tip of each leg 13 formed in an L-shape and projecting radially outward from the outer peripheral edge of the base plate 12 is connected to the upper end of the case body 1 via a cushioning material 14 such as rubber. It is fixed to support. That is, the cushioning members 14 and 14 are engaged with the insides of the first cutouts 15 and 15 formed at a plurality of locations (four in the illustrated example) at the upper edge of the case body 1, and the cushioning materials 14 and 14 are engaged. The tip portions of the leg pieces 13 and 13 are inserted into the recess 16 formed in the above. The upper end surfaces of the buffer materials 14 and 14 are held down by the outer peripheral edge of the upper end plate 5. Accordingly, the buffer materials 14 and 14 do not come out of the first cutouts 15 and 15, and the brush substrate 11 is supported and fixed in a buffered manner inside the upper end portion of the case body 1.
[0007]
The brushes 18 and 18 are placed in the brush holders 17 and 17 fixed at two positions on the lower surface of the substrate part 12, which is a surface facing the commutator 10 on one side of the brush substrate 11, respectively, and the diameter direction of the substrate part 12 It is stored in a freely displaceable manner. These brushes 18 and 18 are electrically connected to terminals 20 and 20 of a coupler 19 provided on the outer peripheral surface of the case body 1, respectively. Further, each of the brushes 18 and 18 is given an elastic force directed inward in the diameter direction of the substrate portion 12 by a spring (not shown). Accordingly, the inner end surfaces of the brushes 18 and 18 are in sliding contact with the outer peripheral surface of the commutator 10 elastically.
[0008]
The leg pieces 13 and 13 are provided between the outer peripheral edge of the substrate portion 12 constituting the brush substrate 11 as described above and the inner peripheral surface of the upper end plate 5 fixed to the upper end opening of the case body 1. Except for the formed part, the ventilation path 21 having an arcuate planar shape is intermittently formed in the circumferential direction. On the other hand, a plurality of exhaust holes 22, 22 are provided near the outer periphery of the intermediate portion of the upper end plate 5. Further, an annular protruding wall 23 is provided over the entire circumference of the upper surface of the substrate portion 12 on the inner side in the diameter direction of the substrate portion 12 than the exhaust holes 22 and 22. The upper end edge of the annular protruding wall 23 is made closer to the inner side in the diameter direction than the exhaust holes 22, 22 on the lower surface of the upper end plate 5. Therefore, a portion between the upper end edge of the annular protruding wall 23 and the lower surface of the upper end plate 5 becomes a labyrinth seal portion 24 having a small gap size.
[0009]
When the motor for driving a blower fan of an air conditioner for automobiles configured as described above is incorporated in the air conditioner for automobiles, the air blower is blown into a portion protruding from the upper surface of the upper end plate 5 at the upper end of the rotary drive shaft 6. The fan 25 is fixed. Further, as shown in FIG. 7, the motor is held by a synthetic resin mounting bracket 26 except for its upper end portion. The mounting bracket 26 includes a holding cylinder part 27, a second notch 28 formed in a part of the holding cylinder part 27, and an attachment flange 29. Of these, the holding cylinder part 27 is formed in a bottomed cylindrical shape having an open upper end and a closed lower end. Also, an air supply port (not shown) is provided at the lower end of the holding cylinder portion 27, and the blower fan is provided at an intermediate portion between the air supply port and a duct (not shown) constituting an automobile air conditioner. A portion through which air blown out by 25 passes is communicated with an air supply hose (not shown). Therefore, during the operation of the air conditioner for automobiles, a part of the air flowing through the duct is sent into the holding cylinder portion 27, and further, this air passes through the inside of the motor and is blown from the exhaust holes 22, 22. It will go out to the back side part of 25, and the said motor is cooled. A plurality of protrusions (not shown) are formed on the inner peripheral surface of the holding cylinder portion 27 in the axial direction of the holding cylinder portion 27. The diameter of the maximum inscribed circle of the plurality of protrusions is slightly smaller than the outer diameter of the case body 1. Therefore, when the case main body 1 is pushed into the holding cylinder portion 27, the case main body 1 is caused by a strong frictional force acting between the outer peripheral surface of the case main body 1 and the tip edge of each protrusion. It is firmly held in the holding cylinder part 27.
[0010]
The second cutout 28 is formed at the upper end edge of the holding cylinder portion 27 at a portion corresponding to the mounting portion of the coupler 19. That is, the coupler 19 has a holder 30 that is entirely made of a synthetic resin in an L shape. The holder 30 has a side plate portion 31 attached to the outer peripheral surface of the upper end portion of the case body 1 and a lateral side projecting outward in the diameter direction of the case body 1 from the outer surface of the lower end portion of the side plate portion 31. And a plate portion 32. The terminals 20, 20 protrude downward from the lower surface of the horizontal plate portion 32. Conductive wires for electrically connecting the terminals 20 and 20 to the brushes 18 and 18 are introduced into the case body 1 through the synthetic resin constituting the holder 30. A third notch 42 (FIG. 6) is also formed at a position where the upper end edge of the case body 1 is aligned with the second notch 28. The holder 30 of the coupler 19 is coupled and supported to the case body 1 by engaging a part of the flange plate portion 31 with the third cutout 42.
[0011]
Further, the mounting flange 29 is formed on the outer peripheral surface of the intermediate portion of the holding cylinder portion 27 so as to protrude outward in the diameter direction of the holding cylinder portion 27. In order to mount the blower fan driving motor to which the blower fan 25 is attached to the intake unit constituting the automotive air conditioner, the blower fan 25 is passed through the through-hole provided in the bottom plate portion of the case constituting the intake unit. Insert into the case above. And the said attachment flange 29 is fixed to the lower surface of the said baseplate part with a screw, a rivet, etc. A part of the mounting flange 29 is formed with a through hole 34 at a position where it is aligned with the coupler 19 so that the upper surface and the lower surface of the mounting flange 29 communicate with each other. The lower portion of the coupler 19 enters the through hole 34 in a state where the case main body 1 of the blower fan driving motor is fitted and fixed to the holding cylinder portion 27. Accordingly, a connector (not shown) provided at the end of the harness for energizing the blower fan driving motor is inserted into the through hole 34 from below the mounting flange 29 and connected to the coupler 19. To do.
[0012]
When the coil of the rotor 9 is energized through the terminals 20 and 20, the conductors 33, the brushes 18 and 18, and the commutator 10 from the assembled state as described above, and the rotary drive shaft 6 to which the rotor 9 is fixed is rotated, The fan 25 sucks air from the upstream end opening of the duct and blows it out from the downstream end opening into the vehicle interior. Part of the air flowing in the duct in this way is sent to the lower end opening portion of the case body 1 through the air supply hose, and flows in the case body 1 from the lower end opening toward the upper end opening. Each component of the drive motor is cooled.
[0013]
In this way, many parts of the air that flows from the bottom to the top in the case main body 1 while cooling the constituent members are the outer peripheral edge of the substrate portion 12 and the inner peripheral surface of the upper end plate 5. The air flows through the ventilation path 21 existing between the air and the air, and is further discharged to the inside in the diameter direction of the blower fan 25 through the plurality of exhaust holes 22 and 22 with the aid of the suction force of the blower fan 25. Part of the air that does not pass through the ventilation path 21 flows through a gap between the inner peripheral edge of the substrate portion 12 and the outer peripheral edge of the commutator 10.
[0014]
[Problems to be solved by the invention]
The motor for driving a blower fan of an automotive air conditioner configured and acting as described above is desired to more reliably prevent water from entering the motor from the viewpoint of ensuring durability and reliability. . That is, the intake unit of the automotive air conditioner can freely select an inside air circulation mode for taking in air in the vehicle interior and an outside air intake mode for taking in air outside the vehicle interior. When the outside air intake mode is selected during rainy weather or snowing, it is inevitable that moisture such as raindrops is mixed in the outside air sucked into the inner diameter side of the blower fan 25. If such moisture enters the case body 1 of the blower fan drive motor, it may cause corrosion of the components of the blower fan drive motor, or a failure due to freezing of the movable part during cold weather. It may cause.
[0015]
On the other hand, in the case of the conventional structure, in order to install the coupler 19, as shown in FIG. 7, the lower end edge 35 of the second notch 28 formed in a part of the holding cylinder portion 27 constituting the mounting bracket 26. The height position is set to be substantially the same as or lower than the height position of the upper surface of the mounting flange 29 formed on the outer peripheral surface of the mounting bracket 26. A protruding wall 36 is formed at a position aligned with the second notch 28 on the upper surface of the mounting flange 29 so as to surround the through hole 34 through which the flange plate portion 31 of the coupler 19 is inserted. It cannot be said that the moisture entry preventing effect is necessarily sufficient.
[0016]
That is, when the blower fan 25 is rotationally driven in the outside air intake mode and the outside air is sucked into the inner diameter side of the blower fan 25, the raindrops mixed in the outside air get over the protruding wall 36 and the outer periphery of the case body 1 Reach close to the surface. A water stop plate 37 is provided over the entire periphery of the lower surface middle portion of the blower fan 25 so that the moisture is dropped downward, but a part of the moisture is placed on the outer circumferential surface of the case body 1. Reach up to. The raindrops reaching the outer peripheral surface of the case main body 1 in this way are second notches 28 formed at the upper end edge of the holding cylinder portion 27 and third notches formed at the upper end edge of the case main body 1. 42 enters the case main body 1 through a gap between the platen portion 31 of the coupler 19 and the inconvenience as described above.
The motor for driving the blower fan of the air conditioner for automobiles of the present invention has been invented to eliminate such inconvenience.
[0017]
[Means for Solving the Problems]
The motor for driving a fan of an air conditioner for an automobile according to the present invention includes a motor for driving to rotate the fan of an air conditioner for an automobile, similarly to the motor for driving an air fan of a conventional air conditioner for an automobile. The outer periphery of the upper end of the drive motor, such as a mounting bracket for coupling the drive motor to the bottom surface of the case constituting the intake unit of the automotive air conditioner or the lower case constituting the portion including the bottom surface of the case And a member having a flange-like portion protruding outward in the diameter direction from the surface.
The driving motor includes a cylindrical case main body, a lower end plate fixed to the lower end opening of the case main body, an upper end plate fixed to the upper end opening of the case main body, and the case main body. A rotary drive shaft that is inserted in the center of the rotary shaft and rotatably supported by a lower bearing on the lower end plate by a lower bearing, and a portion near the upper end of the intermediate portion by an upper bearing on the upper end plate; A rotor fixed to an intermediate portion of the shaft, a stator fixed to the inner peripheral surface of the case body and opposed to the outer peripheral surface of the rotor, and an energizing coupler engaged and held at the upper edge of the case main body With.
The mounting bracket or the lower case includes a holding cylinder portion that fits and holds the case main body inside, and a notch formed in a portion corresponding to the mounting portion of the coupler at an upper end edge of the holding cylinder portion. And an attachment flange formed on the outer peripheral surface of the intermediate portion of the holding cylinder portion so as to protrude outward in the diameter direction of the holding cylinder portion or a bottom plate portion constituting the bottom surface of the case.
And it is used in the state which fixed the ventilation fan to the part which protruded from the upper end part of the said case main body at the upper end part of the said rotational drive shaft.
In particular, in the motor for driving a blower fan of an air conditioner for automobiles according to the present invention, the lower end edge of the notch is in the state of use, and the moisture enters through the notch rather than the upper surface of the mounting flange or the bottom plate portion. enough to prevent, with is positioned above a part of the coupler, to form a engaging groove for inserting a lower portion of the lower edge of the notch part of the holding cylinder unit. Along with this, a notch cylindrical standing wall is formed on the upper surface of the mounting flange or the bottom plate part, and the discontinuous part of the standing wall is located at the same position as the notch in the circumferential direction of the standing wall. .
[0018]
[Action]
The operation when the air taken in from the vehicle interior or the outside of the vehicle interior is sent into the duct in which the evaporator and the heater core are arranged by the motor for driving the fan of the air conditioner of the present invention configured as described above is as described above. It is the same as the motor for driving the blower fan of the conventional automobile air conditioner.
In particular, in the case of the motor for driving a blower fan of an air conditioner for automobiles of the present invention, the lower end edge of the notch formed in the portion corresponding to the mounting portion of the coupler at the upper end edge of the holding cylinder portion is used as the mounting flange. Or since it is located above the upper surface of the bottom plate part of the case, the amount of moisture such as raindrops entering the case body through the gap between the notch and the coupler can be reduced.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an example of a reference example of the present invention. The feature of this example is that the upper end of the holding cylinder portion 27 that constitutes the mounting bracket 26 in order to prevent moisture such as raindrops from entering the case body 1 that constitutes the blower fan drive motor in the outside air intake mode. The height position of the lower end edge 35a of the second notch 28a (corresponding to the notch described in the claims) formed at the edge is sufficiently shifted upward, and at the part of the holder 30a constituting the coupler 19a. The engagement groove 38 is formed. Since the configuration and operation of the other parts are the same as in the case of the above-described conventional structure, the explanation for the equivalent parts will be omitted or simplified, and the following will focus on the characteristic parts of this example .
[0020]
A second notch 28a is formed at the upper end edge of the holding cylinder portion 27 so as to engage the hook plate portion 31a constituting the holder 30a of the coupler 19a. In addition, a dam plate 39 is formed in a part of the holding cylinder 27 that is located below the second notch 28a and above the upper surface of the mounting flange 29. . Accordingly, the upper edge of the barrier plate 39 is the lower edge 35a of the second notch 28a, and the lower edge 35a of the second notch 28a is the height h shown in FIG. It exists above the upper surface of the mounting flange 29.
[0021]
On the other hand, an engagement groove 38 for inserting the barrier plate 39 and the upper end edge of the case body 1 without a gap is formed in the lower surface intermediate portion of the saddle plate 31a constituting the holder 30a. When the case body 1 is pushed into the holding cylinder portion 27 in order to attach the mounting bracket 26 to the blower fan driving motor, the barrier plate portion 39 is inserted into the engagement groove 38 and at the same time, the side of the holder 30a. The terminals 20, 20 protruding from the lower surface of the plate portion 32 are inserted into the through holes 34 formed in the mounting flange 29.
[0022]
In the case of the motor for driving a blower fan of an automotive air conditioner according to a reference example of the present invention configured as described above, it is formed at a portion corresponding to the mounting portion of the coupler 19a at the upper end edge of the holding cylinder portion 27. Since the lower end edge of the second notch 28a is positioned sufficiently above the upper surface of the mounting flange 29, the gap between the second notch 28a and the flange portion 31a of the coupler 19a Thus, the amount of moisture such as raindrops entering the case body 1 of the blower fan driving motor can be reduced. That is, when the blower fan 25 is rotationally driven in the outside air intake mode and the outside air is sucked into the inner diameter side of the blower fan 25, the moisture mixed in the outside air gets over the protruding wall 36 provided around the through hole 34. , And reaches the vicinity of the outer peripheral surface of the case body 1. The water droplets collide with a water stop plate 37 provided on the entire lower surface of the blower fan 25 and fall down, or the inner peripheral surface of the holding cylinder portion 27 and the outer peripheral surface of the case main body 1. Enter the gap between.
[0023]
In the case of the above-described conventional structure, a part of the water dropped downward by the water stop plate 37 in this way passes through the gap between the inner peripheral edge of the second notch 28 and the outer peripheral edge of the flange plate portion 31. In the case of the motor for driving a blower fan of an automobile air conditioner according to a reference example of the present invention, most of the water dropped downward by the water stop plate 37 enters the dam plate portion 39. It is not blocked and enters the case body 1. Therefore, it is possible to prevent inconvenience due to moisture entering the case body 1, that is, malfunction due to corrosion of components and freezing of moisture.
[0024]
Next, FIG. 2 shows an example of an embodiment of the present invention. This example is the above-described reference example, and a standing cylindrical wall 40 is formed on the upper surface of the mounting flange 29 constituting the mounting bracket 26. That is, the standing wall 40 is formed on the upper surface of the mounting flange 29, and the standing wall 40 and the water stop plate 37 (see FIGS. 1 and 7) formed on the lower surface of the blower fan 25 are arranged slightly shifted in the diameter direction. In this way, the passage through which moisture such as raindrops reaches the case main body 1 is bent so that the moisture can be easily dropped downward. The reason why a part of the standing wall 40 is discontinuous is to discharge moisture that has fallen inside the standing wall. However, if the upright wall 40 is present in the vicinity of the second notch 28a formed at the upper edge of the holding cylinder portion 27, the water that has collided with the outer peripheral surface of the upright wall 40 and jumped upward will be described. May reach the notch 28a. Therefore, in the case of this example, by omitting the vicinity of the second notch 28a (the chain line portion in FIG. 2) in a part of the standing wall 40, moisture is absorbed in the second notch 28a. Prevents jumping upwards.
[0025]
According to the experiment conducted by the present inventor, the width dimension of the gaps 41, 41 provided between the edge of the standing wall 40 and the protruding wall 36 is used to discharge moisture that has entered the inside of the standing wall 40. Is 10 mm, and the lower end edge 35 a of the second notch 28 a is provided at a position 11 mm from the upper surface of the mounting flange 29, the width dimension is 3 mm and the lower end edge position of the second notch 28 is Compared to the case of the conventional structure in which the upper surface position of the mounting flange 29 is matched, the amount of moisture entering the case body 1 can be reduced to 1/200 or less.
[0026]
In the example shown in the figure, the holding cylinder portion 27 for internally fitting and fixing the case main body 1 of the blower fan driving motor is provided independently of the case constituting the intake unit. The holding cylinder portion 27 and the case are coupled to each other by using an attachment flange 29 formed on the holding cylinder portion 27. However, the present invention is not limited to such a structure, and can be implemented in a structure in which the holding cylinder portion 27 is directly formed on the case. That is, the case constituting the intake unit is configured by overlapping the upper case and the lower case in the middle. In the case of such a structure, a part of the lower case is formed, and the holding cylinder portion 27 is provided continuously from the bottom plate portion constituting the bottom surface of the case. Even in such a structure, the present invention can be carried out in the same manner as in the case except that the mounting flange 29 is changed to the bottom plate portion.
[0027]
【The invention's effect】
Since the blower fan driving motor of the air conditioner for automobiles of the present invention is configured and operates as described above, the durability and reliability of the blower fan driving motor can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram corresponding to the right part of FIG. 6 and showing an example of a reference example of the present invention.
FIG. 2 is a partial perspective view of a mounting bracket showing an example of an embodiment of the present invention .
FIG. 3 is a half cut side view showing a blower fan driving motor according to the present invention.
4 is a plan view seen from above in FIG. 3;
FIG. 5 is a bottom view similarly viewed from below.
FIG. 6 is an upper cross-sectional view showing a state where a blower fan is attached.
7 is a view corresponding to the right part of FIG. 6, showing a state in which a mounting bracket is mounted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case main body 2 Stator 3 Lower end plate 4 Air supply gap 5 Upper end plate 6 Rotation drive shaft 7 Lower slide bearing 8 Upper slide bearing 9 Rotor 10 Commutator 11 Brush substrate 12 Substrate part 13 Leg piece 14 Buffer material 15 First notch 16 Recess 17 Brush holder 18 Brush 19, 19a Coupler 20 Terminal 21 Ventilation path 22 Exhaust hole 23 Annular protruding wall 24 Labyrinth seal part 25 Blower fan 26 Mounting bracket 27 Holding cylinder part 28, 28a Second notch 29 Mounting flange 30, 30a Holder 31, 31 a Gutter plate portion 32 Horizontal plate portion 33 Conductor 34 Through hole 35, 35 a Lower end edge 36 Projection wall 37 Water stop plate 38 Engagement groove 39 Dam plate portion 40 Standing wall 41 Gap 42 Third notch

Claims (1)

A drive motor for rotationally driving a blower fan of an automotive air conditioner, and a mounting bracket for coupling the drive motor to the bottom surface of the case constituting the intake unit of the automotive air conditioner or the bottom surface of the case A lower case constituting a part,
The driving motor includes a cylindrical case main body, a lower end plate fixed to the lower end opening of the case main body, an upper end plate fixed to the upper end opening of the case main body, and the center of the case main body. A rotary drive shaft that is rotatably inserted into the lower end plate by the lower bearing on the lower end plate, and a middle portion of the upper end portion thereof by the upper bearing on the upper end plate. A rotor fixed to the intermediate portion, a stator fixed to the inner peripheral surface of the case main body and facing the outer peripheral surface of the rotor, and an energizing coupler engaged and held at the upper edge of the case main body Prepared,
The mounting bracket or the lower case includes a holding cylinder portion that fits and holds the case main body inside, a notch formed in a portion corresponding to the coupler mounting portion at the upper end edge of the holding cylinder portion, On the outer peripheral surface of the intermediate portion of the holding cylinder portion, provided with a mounting flange formed in a state protruding outward in the diameter direction of the holding cylinder portion or a bottom plate portion constituting the bottom surface of the case,
In a motor for driving a fan of an air conditioner for automobiles used in a state in which a fan is fixed to a portion protruding from the upper end of the case body at the upper end of the rotary drive shaft,
In use, the lower end edge of the notch is positioned above the upper surface of the mounting flange or the bottom plate part, and a part of the coupler is partly below the lower end edge of the notch. An engaging groove for inserting the side portion is formed , and a standing cylindrical wall is formed on the upper surface of the mounting flange or the bottom plate portion, and the discontinuous portion of the standing wall is formed with respect to the circumferential direction of the standing wall. A motor for driving a blower fan of an air conditioner for an automobile, wherein the motor is arranged at the same position as the notch .

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