JPH0893472A - Fan for cooling radiator - Google Patents

Abstract

PURPOSE: To downsize a fan and to improve the cooling efficiency of a radiator by allowing the planetary motion of a rolling wheel with the movement of a fan unit. CONSTITUTION: Pulleys 2, 2, 2, 2' are arranged in the vicinity of four corners of a radiator 1, one pulley 2 of these pulleys 2, 2, 2, 2' is connected to an output shaft of an engine, a belt 3 is stretched over the pulleys 2, 2, 2, 2', a fan unit 6 is fitted to the belt 3, and a fan 5 is driven by a motor 4 provided on the fan unit 6 while the fan unit 6 is moved along the loop-shaped track passing four corners of the radiator 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator cooling fan installed in an air conditioning system or a water cooled engine.

[0002]

2. Description of the Related Art A fan for cooling a radiator has a fan 5 as shown in FIGS. 8 (a) and 8 (b) in order to allow air to pass from the front side to the back side of a radiator (radiator core) or in the opposite direction.
Is placed in parallel with the heat dissipation surface of the radiator 1, and one is placed in the center,
Alternatively, a plurality of units are provided on the upper, lower, left and right sides. Most of the fans, which are the representative of fans, change the wind direction by swinging the head, but in the radiator cooling fan of air conditioning equipment, it is fixed at a fixed position with respect to the radiator core, and the blowing range is Is always constant. Further, in a radiator cooling fan of an automobile, as shown in FIG. 9, the fan unit 6 is retracted laterally from the radiator 1 surface in accordance with the vehicle speed to reduce the ventilation resistance of the traveling wind passing through the core to radiate heat. Although a structure that enhances the effect has been proposed (Shokaisho 60
It is necessary to say that the fixed idea is still established, except for its structure.

[0003]

If the fan is fixed to the radiator surface, the ventilation pattern of the fan is circular with respect to the rectangular heat radiating surface. Therefore, the hatching is shown in FIG. A part becomes a blind spot, and the cooling efficiency of the blind spot S is poor. Blind spots can be eliminated by enlarging the fan to cover the entire radiator, but enlarging the size is unavoidable and sacrificing mountability for automobiles.

[0004]

SUMMARY OF THE INVENTION The present invention is a radiator cooling fan that eliminates blind spots to improve cooling efficiency, and has a structure in which a fan unit is arranged along a loop-shaped track passing through four corners of a radiator surface. It has been installed so that it can be moved.
In the fan unit, guide wheels are arranged in the vicinity of the four corners of the radiator surface, and at least one of the guide wheels is provided with a rotation driving means, and the guide wheels are hung over the guide wheels. By attaching to the cord body, it can be moved along a loop-shaped track passing through the four corners of the radiator surface. The fan unit includes an electric fan, a rolling wheel that planetarily moves in a loop-shaped orbit passing through the four corners of the radiator surface, and a fan that rotates integrally with the rolling wheel. Along with forming a tooth profile on the outer periphery, the tooth profile is meshed with a rack of a track rail arranged in parallel with the cord body, and the rolling wheels are caused to make a planetary motion as the fan unit moves, or the rolling wheels are It is also possible to have a structure in which the rolling wheels are caused to make a planetary motion as the fan unit moves by contacting with a track rail provided in parallel with the cord body.

[0005]

A small fan is used, and the small fan can cool the entire surface of the radiator evenly. If the fan unit is equipped with an electric fan, the moving speed of the fan unit and the rotation of the fan can be controlled independently, and if the rolling wheels are built into the fan unit,
Although the moving speed of the fan unit and the rotation of the fan cannot be controlled individually, the electric fan is not required and the rotation speed can be changed depending on the diameter of the rolling wheels.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which a radiator cooling fan according to the present invention is applied to an engine will be described with reference to the drawings. 1
Are radiators, and pulleys 2, 2 ... As guide wheels are rotatably provided at four corners on the back side of the radiator 1, and the pulleys 2, 2, 2, 2'are provided with ropes. A belt 3 as a body is looped around, and one of the pulleys 2'is connected to an output shaft of an engine (not shown).

A fan unit 6 having a fan 5 driven by an electric motor 4 is fixed to the pulley 3,
The diameter of the fan 5 is half the height of the radiator surface, and is set smaller than usual. In such an electric fan, the fan unit is rotatable with respect to, for example, a base fixed to a belt so that the motor does not rotate even if the moving direction of the belt changes, or the It is necessary to make the connecting portion 4a with the cord rotatable and to prevent the cord from twisting.

In the radiator cooling fan thus constructed, the belt 3 is moved in an endless track by the rotation of the pulley 2'connected to the output shaft of the engine. Along with that, the fan 5 of the fan unit 6 performs a planetary motion along a loop-shaped orbit passing through the four corners of the radiator surface around which the belt is stretched, so that the entire surface of the radiator 1 is blown and uneven cooling occurs. Absent.

In the above embodiment, the fan is rotated by an electric motor, but it can be rotated by utilizing the endless track motion of the belt. Next, an example of the change will be described.
As shown in FIGS. 3 and 4, a track rail 8 having a rack 7 on the inner surface is provided around the belt 3 looped around in a loop shape, and the fan unit 6 is integrally rotated with the fan 5 to rotate integrally. A gear 9 as a driving wheel is provided, and the gear 9
And the rack 7 are engaged with each other. According to this structure, the fan unit 6 moves in the endless track motion of the belt 3 so that the gear 9 makes a planetary motion and the fan 5 is rotated. Therefore, like the electric fan, the fan unit 6
In addition, a fan drive source and electrical wiring are unnecessary.

Further, as shown in FIG. 5, the gears may be changed to simple rolling wheels 10 and the rack of the track rail 8 may be omitted to cause the interlocking wheels 10 to move in a planetary motion by friction. In that case, the outer circumference of the rolling wheel 10 is covered with rubber 11, guide rollers 12, 12, ... Are attached to suppress looseness of the belt, and although not shown, the rolling wheel is pressed against the track rail surface on the fan unit. It is desirable to devise such that the frictional force is effectively used, such as by providing a biasing means. When the rolling wheels are used as described above, the rotation of the fan can be changed by the diameter of the rolling wheels.
Although the embodiment has one fan unit, as shown in FIG. 6, a pair of or more fan units 6 and 6 may be attached so as not to interfere with each other to enhance the cooling efficiency, which is not shown. Fixed the main fan in the center,
In order to supplement the cooling of the blind spot, the fan of the present invention may be used in combination for the sub.

For moving the fan unit, a pair of hydraulic actuators 13 and 14 can be used as shown in FIG. 7, and a chain other than a belt can be suitably used as the cord, and the chain is used. In this case, a sprocket is used as the guide wheel. Further, in the embodiment, power is supplied from the drive shaft of the engine, but in the air conditioning equipment, the guide wheel is rotated by the electric motor.

The means for attaching the fan unit to the cord body may be any structure as long as the fan unit moves integrally with the cord body along a loop-shaped orbit passing through the four corners of the radiator surface. However, the guide wheels, racks and track rails can be arranged freely by using mounts fixed to the radiator or by fixing them to a frame independent of the radiator. The track rail can be arranged inside the cord body, and can be appropriately changed within the range not departing from the gist of the present invention.

[0013]

According to the present invention, the size of the fan can be reduced, and the ventilation can reach all corners of the radiator surface to enhance the cooling efficiency. Further, by effectively utilizing the track rail and the rolling wheels, if the rolling wheels are caused to make a planetary motion, it is possible to suppress wasteful use of energy.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example in which a radiator cooling fan of the present invention is implemented in an automobile engine.

FIG. 2 is an explanatory diagram of a fan unit.

FIG. 3 is an explanatory diagram of a modified embodiment.

FIG. 4 is an explanatory diagram showing a meshing state between a track rail and a gear.

FIG. 5 is an explanatory diagram showing the relationship between the track rail and the interlocking wheels.

FIG. 6 is an explanatory diagram of a modified embodiment.

FIG. 7 is an explanatory diagram of a modified embodiment.

FIG. 8 is an explanatory diagram of a conventional example.

FIG. 9 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1 ・ ・ Radiator, 2,2 '・ ・ Pulley, 3 ・ ・ Belt,
4 ・ ・ Electric motor, 4a ・ ・ Connecting part of electric motor and power cord, 5 ・ ・ Fan, 6 ・ ・ Fan unit, 7 ・ ・ Rack, 8 ・ ・ Track rail, 9 ・ ・ Gear, 10 ・ ・ Rolling wheel,
11 ... Rubber, 12 ... Guide rollers, 13,14 ...
Actuator, S ... Blind spot

Claims (6)

[Claims] 1. A fan for cooling a radiator, wherein the fan unit is provided so as to be movable along a loop-shaped track passing through four corners of a radiator surface. 2. Guide wheels are arranged in the vicinity of the four corners of the radiator surface, and at least one of the guide wheels is provided with a rotation drive means, and a cord is hung over the guide wheels. The fan for cooling a radiator according to claim 1, wherein the fan unit is attached to the cord body, and the fan unit is movable along a loop-shaped orbit passing through four corners of the radiator surface. 3. The radiator cooling fan according to claim 1, wherein the fan unit includes an electric fan. 4. The radiator cooling apparatus according to claim 2, wherein the fan unit includes a rolling wheel that planetarily moves in a loop-shaped orbit passing through four corners of a radiator surface, and a fan that rotates integrally with the rolling wheel. fan. 5. A tooth profile is formed on the outer periphery of the rolling wheel, and the tooth profile is meshed with a rack of a track rail arranged in parallel with the cord body, and the rolling wheel is caused to make a planetary motion as the fan unit moves. The radiator cooling fan according to claim 4. 6. The radiator cooling fan according to claim 4, wherein the rolling wheels are brought into contact with a track rail provided in parallel with the cord body, and the rolling wheels are caused to make a planetary motion as the fan unit moves.