JP2009195045A - Vehicular airblasting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular airblasting apparatus in which a rotating drive shaft of a motor having a motor body and a circuit unit is connected to a rotating shaft of a blower via a gear and which prevents a reduction in the fan diameter of the blower. <P>SOLUTION: The motor 5 includes the motor body 5a having a rotor, a stator, and a drive coil, and the drive circuit unit 5b connected electrically and mechanically to the motor body 5a. When the length of the motor body 5a and that of the drive circuit unit 5b in the axial direction of the rotating drive shaft 51 represent respective width dimensions, the motor body 5a is different from the drive circuit unit 5b in width dimension, and either of the motor body 5a and the drive circuit unit 5b that is smaller in width dimension is disposed within the range of the width dimension of either of the motor body 5a and the drive circuit unit 5b that is larger in width dimension. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle blower that blows cooling air to a vehicle heat exchanger such as a radiator.

  Conventionally, a vehicle blower that supplies cooling air to a heat exchanger having a long heat exchange core portion has two axial fans (see JIS B 0132 No. 1010) on the surface of the heat exchange core portion on the downstream side of the air flow. ) And a fan motor is provided on each rotating shaft. That is, in the vehicle air blower having a plurality of blowers, fan motors are required as many as the number of blowers. For this reason, there is a problem in that the entire vehicle blower is increased in size and weight, and the number of parts is increased.

On the other hand, a plurality of axial fans and a single fan motor are arranged facing the heat exchange core part of the heat exchanger, and the rotational drive shaft of the fan motor and the rotational shaft of the axial fan are connected via a gear. A vehicular air blower connected in this manner has been proposed (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 62-112470

  However, when the vehicle blower described in Patent Document 1 is mounted on a vehicle body, the mounting space is limited, so the width dimension of the fan motor, that is, the axial length of the rotation drive shaft in the fan motor. Only you need to downsize the blower.

  By the way, as a fan motor, a brushless motor including a motor body having a rotor, a stator, and a drive coil, and a drive circuit is known. Generally, in a brushless motor, in order to suppress generation of radio noise, a motor main body and a circuit unit are arranged in series in the axial direction of a rotary drive shaft and integrated. For this reason, since the length of the rotational drive shaft in the axial direction becomes longer as a whole motor, when the brushless motor is employed as the fan motor of the vehicle blower, it is necessary to reduce the size of the blower.

  When the blower is downsized, the fan diameter of the axial flow fan is reduced, which causes a problem that the absolute air volume of the blower is reduced. Further, when the fan diameter of the axial fan is reduced, the area of the core portion of the heat exchanger that is not opposed to the blower, that is, the area of the portion where the wind speed is low is increased, and thus the wind speed distribution is biased. .

  In view of the above points, the present invention provides a vehicle air blower in which a rotational drive shaft of a motor including a motor main body portion and a circuit portion and a rotational shaft of a blower are connected via a gear, and the fan diameter of the blower is small. It aims at preventing becoming.

  In order to achieve the above object, according to the first aspect of the present invention, the motor (5) includes a motor main body (5a) having a rotor, a stator and a drive coil, and a motor main body (5a) electrically and mechanically. Circuit portion (5b) connected to each other, and when the axial lengths of the rotation drive shaft (51) in the motor body portion (5a) and the circuit portion (5b) are respectively width dimensions, The motor body part (5a) and the circuit part (5b) have different width dimensions. Of the motor body part (5a) and the circuit part (5b), the smaller width dimension means the larger width dimension. It is characterized by being arranged within the range of the width dimension.

  According to this, the width dimension of the motor (5) as a whole can be made equal to the width dimension of the motor main body (5a). That is, it is possible to prevent the overall width dimension of the motor (5) from increasing by the width dimension of the circuit portion (5b). For this reason, in the vehicle air blower in which the rotational drive shaft (51) of the motor (5) and the rotational shaft (3a) of the blower (3) are connected via gears (3f, 52), the blower (3) The fan diameter can be prevented from becoming smaller.

  Further, as in the invention described in claim 2, the motor body (5a) has a width dimension larger than that of the circuit part (5b), and the circuit part (5b) is a width of the motor body (5a). You may arrange | position within the range of a dimension.

  Further, as in the invention described in claim 3, a plurality of blowers (3) are arranged, and the plurality of blowers (3) may be rotationally driven by a single motor (5). .

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the present invention is applied to a vehicle blower that blows cooling air to a heat exchanger (in this embodiment, a radiator and a refrigerant radiator) mounted on a vehicle. As is well known, the radiator is connected to a cooling water circuit of a vehicle engine (internal combustion engine) and radiates (cools) high-temperature cooling water whose temperature has been increased by absorbing heat in the vehicle engine. As is well known, the refrigerant radiator is connected to the compressor discharge side of the air-conditioning refrigeration cycle and radiates (cools) the refrigerant discharged from the compressor.

  FIG. 1 is a perspective view of the vehicle air blower according to the present embodiment as viewed from the vehicle rear side, and FIG. 2 is a front view of the vehicle air blower according to the present embodiment as viewed from the vehicle rear side.

  As shown in FIGS. 1 and 2, the radiator 1 of the present embodiment is disposed on the vehicle rear side from a refrigerant radiator (not shown). The radiator 1 and the refrigerant radiator are fixed to the vehicle body via the carrier 2. The carrier 2 is also called a front end panel or a radiator support in some literature. Further, the carrier 2 is a rectangular frame-shaped panel body comprising two beam members 2a extending on the upper side and the lower side and extending in the horizontal direction, and a column portion 2b extending in the vertical direction and connecting the two beam members 2a. Has a part.

  Further, the vehicle blower device of the present embodiment includes a blower 3 and a fan shroud 4. Two blowers 3 are arranged in parallel on the vehicle rear side of the radiator 1, that is, on the downstream side of the air flow. The two blowers 3 are rotationally driven by a single motor 5.

  The fan shroud 4 is disposed on the vehicle rear side of the radiator 1. The fan shroud 4 closes the gap between the blower 3 and the radiator 1 and supports the blower 3 with a function of preventing the air flow induced in the blower 3 from flowing around the radiator 1 and the refrigerant radiator. It has a function.

  The fan shroud 4 includes a cylindrical, that is, ring-shaped shroud ring portion 41, and a shroud plane portion 42 that connects the space on the back side of the radiator 1 to the ring portion 41 through a smooth flow path. And in this embodiment, each part, such as the shroud ring part 41 and the shroud plane part 42, is formed so that all may be united.

  The shroud ring part 41 forms a venturi-type flow path space in which the blower 3 can freely rotate leaving a gap of a necessary size at the tip of the blade 3c, and the blower 3 It is supported on the rotation shaft 3a (see FIG. 3) of the gear box 6 and is driven to rotate. In the present embodiment, since the two blowers 3 are arranged in parallel, the shroud ring portion 41 is also formed in parallel so as to correspond to the blower 3. A motor 5 is fixed to the rear side of the shroud flat portion 42 in the vehicle. The motor 5 is disposed in parallel with a center line connecting the centers of the two shroud ring portions 41.

  Next, a specific configuration of the blower 3 in the present embodiment will be described.

  FIG. 3 is a schematic cross-sectional view of the blower 3 according to the present embodiment as viewed from above the vehicle. As shown in FIG. 3, the blower 3 of this embodiment includes an axial fan 30. The axial fan 30 has a plurality of blades 3c extending radially from the boss portion 3b. The boss portion 3b is formed, for example, in a cylindrical shape with one end closed, that is, in a substantially U-shaped cross section, and has a circular bottom portion 3d and a side wall portion 3e protruding substantially at right angles from the edge of the bottom portion 3d. is doing. One end of the rotating shaft 3a is connected to the center of the bottom 3d. A blade 3c is connected to the outer surface of the side wall 3e.

  Moreover, the driving | operation side gear 52 is being fixed to the site | part corresponding to the two air blowers 1 in the rotational drive shaft 51 of the motor 5 (refer FIG. 1, 2), respectively. As the main drive side gear 52, for example, a bevel gear or the like is used.

  The rotational shaft 3 a of the axial fan 30 is disposed perpendicular to the rotational drive shaft 51 of the motor 5. A driven gear 3f is fixed to the other end of the rotating shaft 3a, that is, the end not connected to the boss 3b. The driven gear 3f meshes with the main gear 52, whereby the rotational driving force of the motor 5 is transmitted to the rotating shaft 3a of the axial fan 30, and the axial fan 30 rotates. Yes. As the driven gear 3f, a gear such as a bevel gear is appropriately used.

  The rotary shaft 3a of the axial fan 30 is rotatably supported by the gear box 6 via a first output side bearing 3g and a second output side bearing 3h. This gear box 6 accommodates the driven gear 52 as well as the driven gear 3f, and supports the rotary drive shaft 51 via the input side bearing 53 in a rotatable manner like the rotary shaft 3a. The first output side bearing 3g is disposed between the gear box 6 and the driven side gear 3f, and the second output side bearing 3h is disposed on the inner side of the driven side gear 3f, that is, on the side closer to the rotary drive shaft 51. ing.

  FIG. 4 is a schematic diagram showing the motor 5 in the present embodiment. As shown in FIG. 4, the motor 5 of the present embodiment includes a motor main body 5a having a rotor, a stator, and a drive coil (not shown), and a drive circuit 5b electrically and mechanically connected to the motor main body 5a. It is a brushless motor provided with. The drive circuit unit 5b corresponds to the circuit unit of the present invention.

  Here, the axial direction of the rotary drive shaft 51 in the motor main body 5a, that is, the length in the vehicle width direction is referred to as the width dimension W1 of the motor main body 5a, and the axial length of the rotary drive shaft 51 in the drive circuit 5b. Is referred to as a width dimension W2 of the drive circuit portion 5b. In this embodiment, the width dimension W1 of the motor main body 5a is larger than the width dimension W2 of the drive circuit unit 5b. And the drive circuit part 5b is arrange | positioned in the range of the width dimension W1 of the motor main-body part 5a in the upper side of the motor main-body part 5a.

  As described above, by arranging the drive circuit portion 5b within the range of the width dimension W1 of the motor body 5a, the width dimension of the motor 5 as a whole can be made equal to the width dimension W1 of the motor body 5a. it can. That is, it is possible to prevent the width dimension of the entire motor 5 from increasing by the width dimension W2 of the drive circuit portion 5b. For this reason, in the vehicle air blower in which the rotation drive shaft 51 of the motor 5 and the rotation shaft 3a of the blower 3 are connected via the gears 3f and 52 as in the present embodiment, the fan diameter of the blower 3 is reduced. Can be prevented. Thereby, it can prevent that the absolute air volume of the air blower 3 falls. Furthermore, since the area of the core portion of the heat exchanger that does not face the blower 3, that is, the portion where the wind speed is low, can be reduced, it is possible to suppress the occurrence of bias in the wind speed distribution.

(Other embodiments)
In the above embodiment, the example in which the width dimension W1 of the motor main body 5a is larger than the width dimension W2 of the drive circuit unit 5b has been described. However, the present invention is not limited to this, and as shown in FIG. The width dimension W2 may be larger than the width dimension W1 of the motor body 5a. In this case, the motor main body 5a is disposed within the range of the width dimension W2 of the drive circuit 5b.

  In the above-described embodiment, the example in which the drive circuit unit 5b is disposed on the upper side of the motor main body unit 5a has been described. However, the present invention is not limited thereto, and the drive circuit unit 5b may be disposed on the lower side of the motor main body unit 5a.

  Moreover, although the example which used the brushless motor as the motor 5 was demonstrated in the said embodiment, not only this but a motor with a brush may be used if it has a motor main-body part and a circuit part.

  Moreover, although the said embodiment demonstrated the example which has arrange | positioned two air blowers 3 in parallel, it is not only this but the case where only one air blower 3 is arrange | positioned, or the case where three or more air blowers 3 are arrange | positioned. Also, the present invention can be applied.

It is the perspective view which looked at the air blower for vehicles concerning the embodiment of the present invention from the vehicles back side. It is the front view which looked at the air blower for vehicles concerning the embodiment of the present invention from the vehicles back side. It is the schematic sectional drawing which looked at the air blower 3 in embodiment of this invention from the vehicle upper side. It is a schematic diagram which shows the motor 5 in embodiment of this invention. It is a schematic diagram which shows the motor 5 in other embodiment of this invention.

Explanation of symbols

5 Motor 5a Motor body 5b Drive circuit 51 Rotation drive shaft

Claims (3)

A blower (3) for blowing air to the heat exchanger (1);
A motor (5) for rotationally driving the blower (3),
A vehicle air blower in which a rotation drive shaft (51) of the motor (5) and a rotation shaft (3a) of the blower (3) are connected via gears (3f, 52),
The motor (5) includes a motor body (5a) having a rotor, a stator, and a drive coil, and a circuit portion (5b) electrically and mechanically connected to the motor body (5a). And
When the axial length of the rotation drive shaft (51) in the motor main body (5a) and the circuit portion (5b) is a width dimension,
The motor body portion (5a) and the circuit portion (5b) have different width dimensions.
Of the motor main body (5a) and the circuit portion (5b), the smaller one of the width dimensions is disposed within the range of the larger width dimension. Blower device. The motor body (5a) is larger in width than the circuit (5b),
The said circuit part (5b) is arrange | positioned in the range of the said width dimension of the said motor main-body part (5a), The air blower for vehicles of Claim 1 characterized by the above-mentioned. A plurality of the blowers (3) are arranged,
The vehicle blower according to claim 1 or 2, wherein the plurality of blowers (3) are rotationally driven by a single motor (5).

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