JP2018123753A - Blower - Google Patents

Abstract

To provide a blower having a mounting leg portion that enables high-precision mounting to a base or the like and has high vibration durability. A motor in which a rotating shaft 12 and drive mechanisms 14, 16, 18 of the rotating shaft 12 are housed in a metal motor case 11, an impeller 20 attached to the rotating shaft 12, the motor, The blower 1 is configured to include the fan case 2 in which the impeller 20 is housed and a ventilation path for guiding the sucked outside air is formed on the outer peripheral portion of the impeller 20. A mounting leg 33 for attaching the blower 1 is formed integrally with the motor case 11. [Selection] Figure 4

Description

  The present invention relates to a motor in which a rotating shaft and a driving mechanism for the rotating shaft are housed in a metal motor case, an impeller fixed to the rotating shaft, a motor and an impeller are housed, and guides the sucked outside air. The present invention relates to a fan configured to include a fan case having a ventilation path formed on an outer peripheral portion of an impeller.

  As disclosed in Patent Documents 1 and 2, a hybrid vehicle or the like includes a battery that stores electric power to be supplied to a traveling motor, and an inverter circuit that generates AC power from the battery and outputs the AC power to the traveling motor. Etc. are installed. A blower is mounted to send cooling air to such a device that generates heat at a high temperature.

  In such a blower, mounting legs integrally molded in a resin fan case are installed on a base such as a battery pack or a vehicle body floor in which a plurality of batteries are accommodated, and screws formed on the mounting legs. It was fixed to the base with screws through holes.

JP 2014-15908 A JP 2009-292216 A

  However, when the blower is attached to the base via a resin mounting leg integrally molded with such a fan case, the mounting position accuracy is improved by deformation of the mounting leg due to a high temperature environment exposed after the mounting. There is a risk of deterioration, and there is a risk of sink marks and warping due to differences in the thickness of the mounting legs. Therefore, it was necessary to give a large margin to the mounting dimensions in advance in order to absorb them.

  As a result, there is a risk that the degree of freedom of mounting other components may be impaired, the vibration durability of the blower may be deteriorated, and the mounting leg may be damaged due to vibration during traveling of the vehicle. Also, when using a vibration-proof rubber for suppressing the propagation of vibration as described in Patent Document 2, if the vibration-proof rubber has to be attached in a compressed and cured state due to an error in the mounting dimensions, However, there is also a problem that a sufficient anti-vibration effect cannot be obtained.

  In view of the above-described conventional problems, an object of the present invention is to provide a blower including attachment legs that can be attached to a base with high accuracy and have high vibration durability.

  In order to achieve the above-described object, a blower according to the present invention includes a motor in which a rotating shaft and a driving mechanism for the rotating shaft are housed in a metal motor case, an impeller attached to the rotating shaft, and the motor. And a fan case in which the impeller is accommodated and a ventilation path for guiding the sucked outside air is formed on an outer peripheral portion of the impeller, and the blower is installed at a portion to be attached. A mounting leg portion to be attached is formed integrally with the motor case.

  The drive mechanism includes a rotor that rotates integrally with the rotating shaft and a stator that is disposed around the rotor, and the motor case holds the stator and has an opening through which the rotating shaft projects. It is preferable that the motor case main body is formed with a lid that closes the motor case main body, and the mounting leg is formed on one or both of the motor case main body and the lid. .

  The mounting legs are formed at a plurality of locations, and at least one mounting leg is formed to extend in parallel to the rotating shaft, and is configured to be fastened with a screw from a direction intersecting the rotating shaft. preferable.

  The mounting legs are formed at a plurality of locations, and at least one mounting leg is formed so as to extend in parallel with the rotating shaft, and can be fastened with screws from a direction intersecting the rotating shaft. It is preferable that the mounting leg portion is provided with an opening in which a female screw portion for fastening with a screw is formed. It is further preferable that a vibration-proof member mounting portion is provided on the mounting leg portion.

  According to the present invention, it is possible to provide a blower including a mounting leg portion that enables high-precision mounting to a base or the like and has high vibration durability.

(A) shows embodiment of the air blower by this invention, and is a perspective view which shows a bottom face, a left side surface, and a plane, (b) is a perspective view which shows a front surface, a right side surface, and a plane. (A) is a top view of the blower, and (b) is a rear view of the blower. (A) is a left view of the blower, and (b) is a bottom view of the blower. (A) is sectional drawing of the air blower, (b) is an important section expanded sectional view of the air blower. It is a perspective view of the motor accommodated in the air blower. It is a perspective view of the motor which showed another embodiment and was accommodated in the air blower.

Hereinafter, embodiments of a blower according to the present invention will be described with reference to the drawings.
FIGS. 1 (a) and 1 (b) to 3 (a) and 3 (b) show the appearance of the blower 1, and FIGS. 4 (a) and 4 (b) show the cross-sectional structure of the blower 1. Yes.

  The blower 1 is a blower 1 that cools an in-vehicle battery unit that stores electric power to be supplied to a motor for driving the vehicle. The blower 1 is attached to a battery cover as a base in which the in-vehicle battery unit is accommodated, and cools sucked outside air. It is used to blow air to a plurality of batteries housed inside the battery cover as wind. That is, in this embodiment, the attachment object site | part of the said air blower 1 becomes a battery cover.

  As shown in FIGS. 1A and 1B to FIGS. 3A and 3B, the blower 1 is a so-called centrifugal fan, and includes a fan case 2 and an impeller accommodated in the fan case 2. 20 and a motor 10 that rotationally drives the impeller 20 and the like.

  The fan case 2 is divided and molded into an upper fan case 2a and a lower fan case 2b using, for example, a resin such as polypropylene, and the upper fan case 2a and the lower fan case 2b can be connected to each other via a hook mechanism 7. It is configured.

  As shown in FIG. 2B, the motor 10 is attached to the lower fan case 2 b through a mounting hole 31 provided in a flange 30 as a mounting portion formed to extend in the radial direction from the bottom surface of the motor 10. It is fastened and fixed with a screw 32. A wire harness 40 bundled with a power supply line and a signal line extending from the motor 10 is fixed by a harness holding portion 2e provided in the fan case 2, and a signal extending from a vehicle control unit via a connector 41 provided at the tip. Connected to a wire connector (not shown).

  As shown in FIGS. 1 (a), 1 (b), 2 (a) and 4 (a), (b), the impeller 20 is inclined slightly downward from the central portion toward the peripheral portion. The blade boss 22 having a circular shape in plan view, and a plurality of blades 21 erected concentrically on the outer periphery of the blade boss 22.

  The tip of the rotating shaft 12 of the motor 10 is fitted and fixed in a mounting recess 23 protruding from the center of the blade boss 22 so that the blades 21 are arranged around the circular opening 2f formed in the upper fan case 2a. Yes. A gap between the peripheral portion of the opening 2f and the blade boss 22 is an air supply hole 3.

  An air passage formed by the impeller 20 that is rotationally driven by the motor 10 so that the outside air sucked from the air supply hole 3 formed in the upper fan case 2 a extends along the outer periphery of the impeller 20 inside the fan case 2. 4 is configured to be exhausted from the exhaust port 5 as cooling air. That is, outside air sucked into the fan case 2 from the direction along the rotational axis P of the impeller 20 is exhausted in a direction orthogonal to the rotational axis P.

  The cooling air exhausted from the exhaust port 5 is blown into the inside of the battery cover through a ventilation path installed as necessary, or the internal battery unit is cooled.

  As shown in FIGS. 1 (a), 1 (b) and 4 (a), a convex edge 2c formed in the opening of the upper fan case 2a is a concave edge formed in the opening of the lower fan case 2b. A plurality of locking portions 7a formed along the convex edge portion 2c of the upper fan case 2a and a plurality of claw portions 7b formed along the concave edge portion 2d of the lower fan case 2b, Are joined together by engaging each other. That is, the locking portion 7a and the claw portion 7b function as a hook mechanism 7 that couples the upper and lower fan cases 2a and 2b.

  As shown in FIGS. 4A and 4B, the motor 10 includes a motor case 11 made of a light metal such as galvanized aluminum, a rotating shaft 12, and a rotor 14 that drives the rotating shaft 12. The drive mechanism is composed of the stator 16 and the circuit board 18.

  The motor case 11 includes a cylindrical motor case main body 11a having a top surface and a side wall whose diameter is increased stepwise, and a motor case lid 11b that closes the motor case main body 11a. The rotating shaft 12 is arranged so that the tip end side protrudes upward from an opening 11c formed on the top surface of the motor case body 11a, and the blade boss 22 of the impeller 20 is attached to the tip end side of the rotating shaft 12.

  The rotating shaft 12 is pivotally supported by an upper bearing 13a (13) provided in the motor case main body 11a and a lower bearing 13b (13) provided in the motor case lid 11b, and is disposed at the center of the motor case lid 11b. The thrust plate 19 is rotatably supported. Cylindrical bearing housing portions 11c and 11d are formed by press molding on the top surface of the motor case main body 11a and the motor case lid body 11b, and the bearings are housed therein. In addition, although it is preferable to use a ball bearing as the bearing 13 as in this embodiment, it is also possible to use a slide bearing.

  A rotor 14 disposed in the gap between the upper and lower bearings 13 is fixed so as to be rotatable integrally with the rotary shaft 12, and a stator 16 is fixed to the motor case body 11 a so as to surround the rotor 14. That is, in this embodiment, an inner rotor type brushless motor in which the rotor 14 is rotatably arranged on the inner peripheral side of the stator 16 is used as the motor 10. The motor incorporated in the blower 1 is not limited to the brushless motor, and may be another type of DC motor or AC motor.

  The rotor 14 includes a hollow rotor frame 14a fixed to the rotary shaft 12, and a cylindrical permanent magnet arranged in a cylindrical shape at equal intervals so that the S pole and the N pole are alternately switched on the outer periphery of the rotor frame 14a. 14b. The stator 16 is composed of a stator core 16a composed of laminated silicon steel plates and a winding 16b wound around the stator core 16a, and is configured such that the tip end surface of the salient pole of the theta core 16a faces the permanent magnet 14b. ing.

  The stator core 16a is fixed to the upper side wall of the motor case main body 11a having a stepped diameter expansion, and the circuit board is fixed to the upper side wall of the motor case main body 11a.

  A plurality of drive circuits and control circuits that drive and control the motor 10 are mounted on the circuit board 18, and the drive current supplied to each winding 16 b is controlled by the drive circuit.

  A drive current is supplied to the winding 16b based on a control signal or power supply voltage sent from the outside to the circuit board 18 via the wire harness 40, and an alternating magnetic field having a predetermined frequency is generated from the stator core 17.

  An attractive force and a repulsive force are generated by the alternating magnetic field from the stator core 17 and the magnetic field of the permanent magnet 14 b provided in the rotor 14, and the rotating shaft 12 rotates together with the rotor 14 by these forces.

  As shown in FIGS. 2B, 4A, and 6, the flange 30a having a substantially triangular shape in plan view in the radial direction of the rotary shaft 12 from the lower portion of the side wall of the motor case body 11a and the motor case lid 11b. , 30b (30) are formed so as to overlap with each other, and mounting holes 31 are formed at the tops of the rotating shaft 12 located at equal intervals in the circumferential direction. The motor 10 is fastened and fixed with three screws 32 to the lower surface of the lower fan case 2 b through the screw holes 31.

  Since the motor 10 is attached to the fan case 2 with the extending portions of both the motor case main body 11a and the motor case lid 11b overlapped, vibration of the motor 10 itself is suppressed, and stable driving and noise reduction are achieved. be able to.

  Further, three attachment legs 33 for attaching the blower 1 to the battery cover serving as an attachment target portion extend from positions slightly shifted from the tops of the three flanges 30 along the circumferential direction of the rotary shaft 12. Is formed.

  The mounting leg 33 is formed integrally with the motor case body 11a, and is configured to bend radially outward from a position where it is suspended from the flange 30 in the axial center P direction by a predetermined length. A hole 35 is formed.

  As described above, the mounting legs 33 are integrally formed of the metal constituting the motor case body 11a, so that the mounting legs 33 have high dimensional accuracy with small variations compared to conventional resin mounting legs. As a result, the width of the dimensional tolerance of other parts can be reduced, and the degree of freedom of mounting other parts on the vehicle can be ensured.

  Further, since the mounting leg portion 33 is made of metal, the strength is increased, and there is no risk of the mounting leg portion 33 being deteriorated or damaged due to vibrations during traveling of the vehicle, and the reliability is further improved.

  The attachment target part of the blower 1 may be a vehicle body instead of the battery cover. When the blower 1 is attached to the vehicle body, the attachment leg 33 may be fastened using bolts and nuts.

  Even if the motor 10 generates heat by driving the blower 1, heat is radiated to the vehicle body side through the metal motor case 11 and the mounting leg portion 33, so that an increase in power consumption due to heat generation can be suppressed. Needless to say, the same applies to the case where the battery cover is made of metal.

  If the female screw portion is formed in the mounting hole 35 formed in the mounting leg portion 33, it can be integrally fastened to the mounting target site using a screw without using a bolt and a nut.

  By providing the attachment leg 33 with the vibration isolation member mounting portion, the blower 1 can be attached to the attachment target portion via the vibration isolation member. The shape of the vibration-proof member mounting portion is not particularly limited, and a known shape can be appropriately employed. For example, it may have a shape like a notch into which the vibration isolator is fitted.

Hereinafter, another embodiment of the present invention will be described.
In the above-described embodiment, the case where the mounting leg portion 33 is bent at a right angle with respect to the axis P of the motor 10 has been described. However, the mounting leg portion 33 may not necessarily be bent at a right angle.

  For example, as shown in FIG. 6, one or more of the mounting legs 33 may be formed extending in a direction along the axis P of the motor 10. When the mounting leg portion 33 is configured in this manner, when mounting the air inlet 3 of the blower 1 so as to face in the horizontal direction, it is possible to perform the bolt fastening operation from above the portion to be mounted, and workability for mounting Will improve.

  Further, if the motor 10 accommodated in the fan case 2 is configured to be screwed to the fan case 2 from the outside of the fan case 2, the mounting leg 33 is formed in a substantially parallel posture with the axis P of the motor 10. Thus, the opening of the fan case 2 necessary for extending the mounting leg portion 33 out of the fan case 2 can be reduced. As a result, it is possible to reduce the air leakage, and it is possible to avoid the deterioration of the air blowing performance due to the air leakage.

  In the embodiment described above, the mounting leg portions 33 are provided at three locations, but the mounting leg portions 33 may be provided at one location or two locations if sufficient strength can be secured. Conversely, by providing four or more mounting legs 33, the blower 1 can be firmly fixed to the mounting target site.

  In the embodiment described above, the example in which the mounting leg 33 is formed integrally with the motor case main body has been described. However, the mounting leg 33 may be formed integrally with the motor case lid. In this case, since only the motor case lid 11b needs to be designed to match the shape of the attachment target part, the degree of freedom in design increases.

  Moreover, the attachment leg 33 may be extended and formed so as to be superimposed on both the motor case body and the motor case lid. Further, the mounting leg portion 33 may be integrally formed on both the motor case main body and the motor case lid, and may be formed in different parts so as not to overlap each other.

  In the above-described embodiment, the example in which the flange 30 that is the mounting portion for fixing the motor case 11 to the fan case 2 is formed on both the motor case main body and the motor case lid has been described. It may be formed. In any case, it is preferable that the mounting leg portion 33 is formed at a position corresponding to the flange 30 which is the mounting portion. Since the position of the mounting hole 31 formed in the flange 30 corresponds to the position of the mounting leg 33, both the strength balance with respect to the mounting target portion of the blower 1 and the strength balance with respect to the fan case 2 of the motor 10 are stabilized. The corresponding position means a position separated by a predetermined distance along the circumferential direction of the rotating shaft 12 with respect to each mounting portion, and the predetermined distance is a concept including zero.

  That is, in the blower according to the present invention, it is only necessary that the attachment leg portion for attaching the blower to the attachment target part is formed integrally with the motor case. As a blower, the rigidity when mounted on a vehicle can be increased, and it becomes possible to shift noise around 3 kHz, which is harsh to the sense of hearing, to a high frequency region, and to improve noise.

  When noise in a high frequency region becomes a problem, the noise can be suppressed by attaching the anti-vibration rubber to the attachment leg. At this time, since the motor case and the mounting leg are integrally formed, the dimensional accuracy of the mounting leg is increased. Therefore, the blower can be mounted on the mounting target portion without giving unintended deformation to the vibration-proof rubber. This makes it possible to maximize the performance of the anti-vibration rubber.

  The blower according to the present invention can be used not only for in-vehicle battery units but also for in-vehicle devices that need to be cooled, and widely used in electronic devices and other heat generating devices that need to be cooled in addition to cars. it can.

1: Blower 2: Fan case 2a: Upper fan case 2b: Lower fan case 7: Hook mechanism 10: Motor 11: Motor case 11a: Motor case body 11b: Motor case lid 12: Rotating shaft 13: Bearing 13a: Upper bearing 13b: Lower bearing 14: Rotor (drive mechanism)
16: Stator (drive mechanism)
18: Circuit board (drive mechanism)
19: Thrust plate 20: Impeller 21: Blade 22: Blade boss 30, 30a, 30b: Flange 31: Mounting hole 32: Screw 33: Mounting leg 34: Bending portion 35: Mounting hole 40: Wire harness 41: Connector

Claims (6)

A motor in which a rotating shaft and a driving mechanism of the rotating shaft are housed in a metal motor case;
An impeller attached to the rotating shaft;
A fan case in which the motor and the impeller are housed and a ventilation path for guiding the sucked outside air is formed on an outer peripheral portion of the impeller;
A blower comprising:
An air blower characterized in that an attachment leg for attaching the air blower to an attachment target part is formed integrally with the motor case. The drive mechanism includes a rotor that rotates integrally with the rotating shaft and a stator disposed around the rotor, and the motor case holds the stator and has an opening through which the rotating shaft protrudes. A motor case main body and a lid for closing the motor case main body,
The blower according to claim 1, wherein the mounting leg portion is formed on one or both of the motor case main body and the lid body.   The mounting legs are formed at a plurality of locations, and at least one mounting leg is formed so as to extend in parallel with the rotating shaft, and is configured to be fastened with screws from a direction intersecting the rotating shaft. The blower according to claim 2.   A plurality of attachment portions for fixing the motor case to the fan case are formed on one or both of the motor case main body and the lid body, and the plurality of attachment leg portions are respectively connected to the attachment portions. The blower according to any one of claims 1 to 3, wherein the blower is formed at a position separated by a predetermined distance along a circumferential direction of the rotation shaft.   The blower according to any one of claims 1 to 4, further comprising an opening in which a female screw part for fastening with a screw is formed on the mounting leg part.   The blower according to any one of claims 1 to 5, wherein a vibration-proof member mounting portion is provided on the mounting leg portion.

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