JPH0526320Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an automobile cooling device (radiator device) and an automobile fan device for air cooling an air conditioner.

Prior Art In conventional automobile fan devices that air cool automobile cooling devices (radiator devices) and air conditioners, etc., a planar or cylindrical electric motor is used as the drive source of the fan, and the air is moved in the axial direction of the fan. The flow air cools the radiator of the cooling system and air conditioner installed in front of the automobile fan system. This electric motor is attached to the shroud or motor stay located on the engine side of the automobile, but the bearing of the output shaft tends to become extremely hot due to engine heat or heat generated from driving, and the oil and fats supplied to the bearing tend to heat up excessively. It deteriorated easily and the durability of the electric motor was poor. In order to solve this problem, for example, in Japanese Utility Model Application Publication No. 61-96000, an air guide duct is installed behind the shroud where the electric motor is installed, and a part of the air generated as the fan rotates is taken in. An electric fan has been proposed that cools an electric motor with air by guiding it to a bearing of the motor.

Problems to be Solved by the Invention However, since the electric fan device described above has a configuration in which a separate air guide duct is attached to the shroud, the number of parts increases and the installation workability becomes poor.

The present invention was devised to solve the above-mentioned conventional drawbacks, and its purpose is to efficiently cool the electric motor that rotates the fan with air, thereby improving its durability. Another object of the present invention is to provide an automobile fan device that can reduce the cost of the device by reducing the number of parts.

Means for Solving the Problems Therefore, the present invention provides an electric motor in which a fan is attached to one end of the output shaft and the end opposite to the output shaft is pivotally supported, and a are installed at intervals of , and an air introduction part that takes in a part of the air flow generated as the fan rotates into the interval, and an exhaust part that discharges the air introduced into the interval to the outside are integrally formed. The present invention is characterized in that an automobile fan device is constructed from the fan shroud.

Effect of the invention The present invention is configured as described above, so that when the electric motor is driven to rotate, an air flow in the axial direction is formed by the rotating fan, and the opening of the shroud provided at the rear of the electric motor is is discharged to the outside through the At this time, a part of the airflow passing through the opening of the shroud is introduced between the non-output side end surface of the electric motor and the shroud by the air introduction part, and then is discharged to the outside from the discharge part.
Thereby, the electric motor, particularly the non-output side end surface, is air-cooled by the air flow passing between the non-output side end surface of the electric motor and the shroud.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is an exploded perspective view schematically showing an automobile fan device using a planar electric motor, and Fig. 2 is a central vertical cross-sectional view showing the structure of the electric motor. It consists of a first case 3 having a shape and a second case 5 corresponding thereto, and inside these first case 3 and second case 5, there is a disk-like permanent magnet, and the permanent magnet and the necessary A disk-shaped rotor is provided with excitation coils facing each other with an interval of An output shaft 11 which is rotatably supported via the shaft is housed. A fan 13 made of synthetic resin is provided at the output side shaft end of the output shaft 11 that protrudes outward from the second case 5.
is fixed. Attachment portions 15 and 17 are integrally formed on the outer peripheral edges of the first and second cases 3 and 5 at substantially three division positions in the circumferential direction, and each attachment portion 1
Through holes (not shown) are formed in 5 and 17 so as to coincide with each other.

A protrusion 3a is formed in the center of the end surface on the opposite output side of the first case 3, and a bearing member that rotatably supports the end of the output shaft 11 on the opposite output side is accommodated in the protrusion 3a. has been done. Further, a protrusion 3b is provided on the opposite end surface of the first case 3 to the protrusion 3a.
It is formed so as to face from the side toward the outer circumferential edge and to provide an opening (not shown) at the outer circumferential edge. A lead wire 21 connected to the rectifying brush (not shown) is accommodated in the protrusion 3b and drawn out from the opening. Note that an air vent member 25 made of an elastically deformable rubber member is provided in the opening, and an air vent member 25 is provided in the opening.
It is attached so as to be able to communicate with the inside of the electric motor 1 via b.

A mounting screw 27 is provided in the through hole of each mounting portion 15, 17.
are fixed respectively. and the electric motor 1
A shroud 29 is arranged on the non-output side of the electric motor 1 with a required gap 31 from the non-output side end face of the electric motor 1 . The shroud 29 is connected to the fan 13.
A cylindrical portion 29a surrounding the cylindrical portion 29a and a mounting plate 29b provided on the non-output side of the cylindrical portion 29a are integrally formed. Three openings 29c extending in the circumferential direction are provided on the outer circumferential side of the mounting plate 29b.
It is formed at the dividing position. In addition, the mounting plate 29b
A through hole 29d forming an air discharge part is provided in the center of the
is formed to have a size that almost matches the protrusion 3a of the electric motor 1. Further, a guide plate 29e constituting an air introduction section is integrally formed on the mounting plate 29b corresponding to each opening 29c so as to block a part of the air flow passing through the opening 29c.
The tip end thereof is bent toward the output side of the electric motor 1. Further, three screw holes 29f are formed in the mounting plate 29b so as to substantially coincide with each mounting screw 27, and by screwing the nut 35 to the mounting screw 27 inserted through the spacer 33. The electric motor 1 is fixed to the mounting plate 29b of the shroud 29 with a required gap 31 provided therebetween.

Next, the operation of the automobile fan device constructed as described above will be explained with reference to FIG. 2.

In FIG. 2, when the electric motor 1 is driven, the rotating fan 13 forms an air flow in the direction of the solid arrow A shown in FIG. Ru. Also, a part of the airflow passing through each opening 29c is caused by the guide plate 29 as shown by the solid arrow B in FIG.
e into the gap 31 between the mounting plate 29b and the non-output side end surface of the electric motor 1, and then the through hole 2
It is discharged to the outside via 9d. At this time, the airflow passing through the gap 31 causes the electric motor 1 to
The opposite end face of the output shaft, especially the protrusion 3a in which the bearing member that pivotally supports the output shaft 11 is housed, is air-cooled, and the protrusion 3a is heated excessively by the engine heat and the bearing heat accompanying the rotation of the output shaft 11. This prevents

In this way, in this embodiment, a part of the airflow generated as the fan 13 rotates is guided into the gap 31 between the mounting plate 29b of the shroud 29 and the end surface of the electric motor 1 on the side opposite to the output shaft. 29e and then discharged to the outside through the through hole 29d, the protrusion 3a accommodates a bearing member that supports the non-output side end surface of the electric motor 1, particularly the non-output side shaft end of the output shaft 11. The electric motor 1 is air-cooled to prevent deterioration of motor characteristics and decrease in durability due to excessive heating of the electric motor 1.

In the above description, a part of the mounting plate 29b which extends perpendicularly on a plane to the left side of the cylindrical portion 29a shown in FIG. However, as shown in FIG. 3, the mounting plate 29b is formed to bulge to the left according to the width of the spacer 33, and the electric motor 1 is attached to the bulged mounting plate 29b with the spacer 33. It may also be installed through the As a result, the cylindrical portion 29a in the axial direction
It is possible to narrow the width of the device, and it is possible to downsize the device.

Effects of the invention Therefore, the present invention has been developed to improve durability by efficiently cooling the electric motor that rotates the fan, and to reduce the cost of the device by reducing the number of parts. It is possible to provide equipment.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view schematically showing an automobile fan device using a planar electric motor, Fig. 2 is a central vertical sectional view showing the structure of the electric motor, and Fig. 3 is a modified embodiment of the present invention. FIG. In the figure, 1 is an electric motor, 11 is an output shaft, 13 is a fan, 31 is a gap, 29 is a shroud, 29e is a guide plate forming an air introduction section, and 29d is a through hole forming an air discharge section.

Claims (1)

[Claims for Utility Model Registration] A fan is attached to one end of the output shaft, and
an electric motor whose opposite output shaft end is pivotally supported; and an electric motor which is attached to the opposite output shaft side of the electric motor at a required interval, and which directs a part of the air flow generated as the fan rotates at the interval. A fan device for an automobile, comprising: a fan shroud integrally formed with an air introduction section for taking in the air into the interior and a discharge section for discharging the air introduced within the interval to the outside.