JP2932900B2 - Electric fan device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle electric fan device used for a vehicle radiator or the like.

[0002]

2. Description of the Related Art As an electric fan device for a radiator of a vehicle, for example, as shown in FIG. 4, several (four in the figure) stays 3 are provided on an opening 2a of a shroud 2 mounted on the rear side of a radiator 1. An annular motor support unit 4 is provided integrally with the shroud 2 via a shaft. A fan motor 5 is attached to the inner periphery of the motor support unit 4, and an output shaft of the fan motor 5 is housed in the shroud 2. Some are connected to a fan 6 (for example, Nissan Motor Co., Ltd. 1991
(See “New Car Manual (U13-1)” issued in September).

[0003]

In the above-described apparatus, for example, as shown in FIG. 5, the motor support portion 4 of the shroud 2 is located in the air passage of the blade 6a of the fan 6, so that this becomes a ventilation resistance. There is a problem that the efficiency of the fan 6 is reduced. The motor support 4 and the fan motor 5
Since the entrance of the gap S between the fan 6 and the fan 6 was closed by the boss 6b, the fan motor 5 could not be cooled by blowing air. In this regard, there is an example in which a through hole 6c is formed in the boss 6b of the fan 6 as shown in FIG.
Since the motor supporting portion 4 protruded over the extension of the hole c, even if the cooling air was taken in from the through hole 6c, the ventilation resistance was large and the fan motor 5 could not be efficiently cooled. As an example of promoting the cooling of the fan motor, as described in, for example, Japanese Utility Model Publication No. 2-16021, a method is proposed in which a part of the cooling air from the fan is guided behind the fan motor by a baffle plate. ing. However, as long as the air guide plate is arranged in the air flow path by the fan, the efficiency is inevitably reduced due to the increase in the ventilation resistance.

An object of the present invention is to provide an electric fan device for a vehicle which can efficiently cool a fan motor while preventing an increase in ventilation resistance of the fan.

[0005]

The present invention will be described with reference to FIG. 1 showing an embodiment.
An annular motor support 12 is provided on the opening 0, and a fan motor 13 is mounted on the inner peripheral side of the motor support 12 with the output shaft 132 at the tip thereof facing the inside of the shroud 10. Fan 1 on output shaft 132 of
6 is connected to the boss 17 of the fan 16, and the boss 17 of the fan 16 is applied to an electric fan device for a vehicle in which a ventilation hole 171 is formed. The purpose described above is to provide the outer peripheral surface 173 of the boss 17 of the fan 16, the outer peripheral surface 121 of the motor support 12 of the shroud 10, the outer peripheral end 171 a of the ventilation hole 171 of the boss 17, and the motor support of the shroud 10. This is achieved by providing the inner peripheral surface 120 of the portion 12, the inner peripheral end 171 b of the ventilation hole 171, and the outer peripheral surface 133 of the fan motor 13 in the radial direction of the fan 16. According to the invention of claim 2, the motor support 1
The rear end 130 of the fan motor 13 passing through the inner peripheral side of the motor
A guide piece 15 for guiding the cooling air that has reached the side to the radial center of the fan motor 13 is provided.

[0006]

The outer peripheral surface 173 of the boss portion 17 of the fan 16 and the outer peripheral surface 121 of the motor support portion 12 of the shroud 10 are provided so as to be aligned with each other in the radial direction of the fan 16. 12 does not protrude,
The wind sent from the fan 16 flows without stagnation. Further, the end 1 on the outer peripheral side of the ventilation hole 171 provided in the boss portion 17
71a and inner peripheral surface 1 of motor support portion 12 of shroud 10
20 and the inner peripheral end 171b of the ventilation hole 171 and the outer peripheral surface 133 of the fan motor 13 are provided so as to be aligned in the radial direction of the fan 16, so that the fan motor 13 The flow path of the cooling air is formed straight toward the rear end 130, and the cooling air taken in from the ventilation holes 171 flows to the rear of the fan motor 13 while cooling the fan motor 13 from its outer periphery. According to the second aspect of the invention, the rear end of the fan motor 13 is taken in from the ventilation hole 171 and passes through the inner peripheral side of the motor support portion 12.
The cooling air that has reached the 30 side is guided toward the radial center of the fan motor 13, so that the cooling air flows behind the fan motor 13 and also cools the rear end face of the fan motor 13.

In the means and means for solving the above problems which explain the constitution of the present invention, the drawings of the embodiments are used to make the present invention easy to understand. However, the present invention is not limited to this.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 10 denotes a shroud fixed to the back of a radiator (not shown). This shroud 10 rectifies the cooling air passing through the radiator by surrounding the outer periphery of a fan described later.
An annular motor support portion 12 integrated with the shroud 10 via a plurality of stays 11 is provided on the reference numeral 0 as in the example shown in FIG. A fan motor 13 is inserted into the inner peripheral side of the motor support 12 from behind the shroud 10 (right side in FIG. 1). A plurality of stays 131 (only one is shown in the figure) fixed to a rear end 130 of the fan motor 13 are screwed to the motor support 12 with bolts 14 so that an output shaft 132 of the fan motor 13 is connected to the shroud 10. It is fixed to the motor support 12 while being protruded inward.

A gap S is provided between the inner peripheral surface 120 of the motor support portion 12 and the outer peripheral surface 133 of the fan motor 13 for allowing cooling air to pass therethrough. A conical guide plate 15, whose diameter decreases toward the rear of the fan motor 13, is provided at the rear end (right end in FIG. 1) of the motor support 12.
50 are fitted and detachably mounted. The reason why the guide plate 15 is detachable is that the fan motor 13 can be detached from the rear of the shroud 10. Reference numeral 151 denotes an opening provided at the center of the guide plate 15.
The mounting of the guide plate 15 is not limited to the fitting of the protrusion 150, and various mounting methods such as bolting and screwing may be used.

The output shaft 132 of the fan motor 13 is connected to the fan 16 housed in the shroud 10. FIG.
As shown in FIG. 3 and FIG. 3, the fan 16 has a plurality of (four in the figure) blades 18 formed on the outer periphery of a cylindrical boss 17. In the center of the boss 17, an insert 17 made of a metal such as iron or aluminum is formed in a disk shape.
0 is fixed, and the center of the insert 170 is fitted to the output shaft 132 of the fan motor 13 and tightened by the bolt 19, so that the fan 16
3 is firmly connected to the output shaft 132. The blade 18
Is determined such that when the output shaft 132 of the fan motor 13 rotates in the counterclockwise direction (the direction of arrow F) in FIGS. 2 and 3, the air is forcibly blown from the radiator toward the rear of the shroud 10. Have been.

A plurality of (five in the figure) ventilation holes 171 are formed in the outer periphery of the boss 17 so as to penetrate the boss 17 in the axial direction. Partition walls 172 that partition these ventilation holes 171
Is formed in the shape of a blade inclined in the same direction as the blade 18 described above, and can be forcedly blown from the ventilation hole 171 toward the rear end 131 of the fan motor 13 by the rotation of the fan 16 in the counterclockwise direction described above. Have been.

As shown in FIG. 1 and FIG.
The outer diameter of the boss portion 17 and the outer diameter of the motor support portion 12 are determined to be equal, whereby the outer peripheral surface 173 of the boss portion 17 of the fan 16 and the outer peripheral surface 121 of the motor support portion 12
Are provided so as to be aligned in the radial direction. FIG.
As shown in FIG.
The distance from the outer peripheral side end 171a of the motor support 71 to the distance from the outer peripheral surface 121 to the inner peripheral surface 120 of the motor support 12 is set to be equal (distance A in the figure). The distance from the inner peripheral surface 120 of the motor support portion 12 to the outer peripheral surface 133 of the fan motor 12 is set equal (distance B in the figure). As a result, the outer peripheral end 171a of the ventilation hole 171 of the boss 17 and the inner peripheral surface 120 of the motor support portion 12, the inner peripheral end 171b of the ventilation hole 171 and the outer peripheral surface 133 of the fan motor 13 are respectively formed. Fan 1
6 are provided so as to be aligned in the radial direction.

The apparatus constructed as described above is mounted on a vehicle together with the radiator with the end 101 of the shroud 10 on the fan 16 side along the back of the radiator (not shown). When the temperature of the cooling water circulating through the radiator becomes equal to or higher than a predetermined value, the fan motor 13 is started, and the fan 16 rotates counterclockwise in FIG.
8, the cooling air is forcibly sent from the front to the rear of the vehicle to promote heat exchange in the radiator. here,
In the present embodiment, the outer peripheral surface 173 of the boss portion 17 of the fan 16 and the outer peripheral surface 121 of the motor support portion 12 are provided so as to be aligned in the radial direction, and the motor support portion 12 is removed from the airflow path by the blade 18. Therefore, the ventilation resistance of the cooling air is suppressed low, and the cooling air flows to the rear of the vehicle without stagnation, so that the cooling is efficiently performed.

Further, the fan motor 13 is
Since the flow path of the cooling air extends straight to the rear end 130 of the fan motor 13, the clearance S
The cooling air flowing into the fan motor 13 flows from the outer periphery thereof to the rear end portion 130 of the fan motor 13 while cooling the fan motor 13 from the outer periphery thereof, and the fan motor 13 is efficiently cooled. Therefore, the heat generation of the fan motor 13 is suppressed, and the fan motor 1
3 improves the efficiency and reliability. In addition, in this embodiment, particularly, since the guide plate 15 is provided, the cooling air reaching the rear end portion 130 of the fan motor 13 is further guided by the guide plate 15 and circulates toward the radial center of the fan motor 13. 13 is also cooled from the rear end face side, and the cooling efficiency is further improved. Further, since the partition wall 172 of the ventilation hole 171 is formed in a blade shape, the efficiency of suction of the cooling air into the ventilation hole 171 is also improved.

In correspondence between the above embodiment and the claims,
The guide plate 15 corresponds to a guide piece of the motor support 12. However, the present invention does not necessarily require the guide plate 15, and the guide plate 15 may be omitted when sufficient cooling capacity can be obtained only by cooling from the outer peripheral side of the fan motor 13. The guide piece is not limited to a conical shape, and the guide piece may be provided only on a part of the circumference of the fan motor 13. The partition wall 172 of the ventilation hole 171 does not necessarily need to be formed in a blade shape. The number of blades 18 and the number of ventilation holes 171 of the fan 16 are appropriately set according to the required cooling performance, and the number of blades 18 and the number of ventilation holes 171 may be set independently.

[0016]

As described above, according to the first aspect of the present invention, it is possible to prevent the fan from projecting the motor support portion into the air passage, and to provide the rear end of the fan motor through the ventilation hole provided in the boss portion. Since the cooling air flow path is formed straight toward the fan, the fan motor can be cooled efficiently while suppressing the increase in the ventilation resistance of the fan and performing cooling efficiently. According to the second aspect of the present invention, since the cooling air flows behind the fan motor, the fan motor can be cooled more efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration near a fan motor according to an embodiment of the present invention.

FIG. 2 is a front view of the fan of FIG.

FIG. 3 is a front perspective view of the fan according to the embodiment.

FIG. 4 is a perspective view showing an example of the electric fan device from the back side.

FIG. 5 is a cross-sectional view showing an example of a configuration near a fan motor of a conventional electric fan device.

FIG. 6 is a cross-sectional view showing another example of the configuration near the fan motor of the conventional electric fan device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shroud 12 Shroud motor support part 13 Fan motor 15 Guide plate 16 Fan 17 Fan boss part 18 Fan blade 100 Shroud opening 120 Inner peripheral surface of motor support part 121 Outer peripheral surface of motor support part 130 Rear end of fan motor Part 132 Output shaft of fan motor 133 Outer peripheral surface of fan motor 171 Ventilation hole 171a End of outer peripheral side of ventilation hole 171b Inner peripheral end of ventilation hole 173 Outer peripheral surface of boss portion

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F01P 5/02 H02K 9/06

Claims (2)

(57) [Claims] An annular motor support is provided on an opening of a shroud, and a fan motor is mounted on an inner peripheral side of the motor support in a state where an output shaft at a tip thereof is directed into the shroud. An electric fan device for a vehicle, wherein a boss portion of a fan is connected to the output shaft of a motor, and a ventilation hole is formed in the boss portion of the fan. The outer peripheral surface of the boss portion of the fan and the shroud An outer peripheral surface of a motor support, an outer peripheral end of the ventilation hole of the boss, an inner peripheral surface of the motor support of the shroud, an inner peripheral end of the ventilation hole, and an outer periphery of the fan motor; An electric fan device for a vehicle, wherein surfaces are provided so as to be aligned in a radial direction of the fan. 2. A cooling air passing through an inner peripheral side of the motor supporting portion and reaching a rear end of the fan motor at an end of the motor supporting portion opposite to the fan. 2. The electric fan device for a vehicle according to claim 1, further comprising a guide piece for guiding the radially center side of the vehicle.