JPS6244160Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fan mounting structure for a vehicle cooling system mounted under the floor of a bus or the like.

An example of a conventional bus cooling device that has been commonly used is shown in FIGS. 5 and 6.

5 and 6, 1 is a frame, a compressor 2 is mounted on the center of the frame 1, and on both sides of the frame 1 there is an evaporator case 5 with an evaporator 6 inside, and a condenser case with a capacitor 11 inside. 10 are respectively attached, and the frame 1 is attached under the bus floor.

The evaporator case 5 part is provided with a multi-blade fan 7 for blowing the air cooled by the evaporator 6, and the air blowing opening 10' of the condenser case 10 is provided with an axial flow for blowing air to the condenser 11. A fan 14 is provided. 8 is a seal.

The fans 7 and 14 have pulleys 3, 4, 9,
The compressor 2 is connected to the drive shaft of the compressor 2 driven by a power source (not shown) (an engine dedicated to the cooling system or an engine for running the vehicle) by a V-belt hung around the compressor 13, and is configured to be rotationally driven.

In the above, the axial fan 14 is mounted in a fan guide 10'' formed at the periphery of the air blowing opening 10' of the condenser case 10 so that the tip of the blade is positioned with a predetermined gap in the fan guide 10''. Bracket 1' with section 12 provided on frame 1
It is fixedly attached to the

Conventionally, the position of the axial fan 14 is determined by the fan guide 10'' of the condenser case 10, and since the fan guide 10'' is fixed, the mounting position of the bearing 12 supporting the fan 14 on the frame 1 is determined by the fan guide 10''. is also unchanged.

Therefore, it was necessary to provide a tension pulley 18 for attaching and detaching the fan driving V-belt, which is hung between the pulley 3 of the compressor and the pulley 13 on the fan 14 side, and for absorbing elongation or adjusting the tension.

In the conventional configuration that requires the tension pulley 18 as described above, a moving device 2 is used to move the tension pulley 18 in a direction that applies tension to the belt.
0, which not only increases the number of parts, weight, etc. and is disadvantageous in terms of space, but also requires the pulley 3 and 13 becomes smaller, the belt tension must be increased, which causes various problems such as increased bearing load and shortened bearing life.

Also, the V that drives the multi-blade fan 7 on the evaporator side
The belt also has a tension pulley 19 moving device 21.
Needless to say, it must be installed via the

The purpose of this invention is to solve the above-mentioned problems with the conventional technology. A fan guide surrounding the fan guide is fixed, and a sealing material made of soft synthetic resin is attached to the inner peripheral surface of the fan guide over the entire circumference with its front end surface protruding forward from the front end surface of the fan guide. The sealing material is assembled so that the gap with the tip is zero or close to zero, and the front end surface of the sealing material is flat on the periphery of the air blowing opening having a diameter larger than the inner diameter of the sealing material and smaller than the outer diameter of the sealing material. The bearing is installed in a fixed member having a bearing mounting hole formed of an elongated hole in a direction perpendicular to the rotational axis of the fan so that the bearing can be moved and adjusted while in contact with the fan. It is.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

In Figures 1 and 2, the configuration in which the compressor 2 is attached to the center of the frame 1, the evaporator case 5 with the evaporator 6 inside, and the condenser case 10 with the capacitor 11 installed on both sides of the frame 1 are shown in Figures 5 and 6. The structure is the same as that of the conventional structure, and the same reference numerals as in FIGS. 5 and 6 represent the same parts.

In the present invention, as shown in the first to third figures, the fan 1
A radial support member 15 is removably attached to the flange portion 12' of the bearing 12 on the outer periphery of the bearing 12 of No. 4,
A fan guide 16 made of a cylindrical member surrounding the outside of the blade tip of the fan 14 is fixed to the tip of the support member 15, and a seal made of a soft synthetic resin such as a soft sponge with low density is attached to the inner peripheral surface of the fan guide 16. Attach the material 17 all around the circumference, for example by gluing, etc.
The gap between the inner peripheral surface of the sealing material 17 and the blade tip of the fan 14 is configured to be zero or close to zero.

The front end surface 17' of the sealing material 17 is structured to protrude forward from the front edge of the fan guide 16.

On the other hand, the ventilation opening 1 of the capacitor case 10
The diameter 0' is larger than the outer diameter of the blade of the fan 14, that is, the inner diameter of the sealing material 17, and smaller than the outer diameter of the sealing material 17.

The bearing mounting hole 1'' of the bracket 1', which fixes the bearing 12, is connected to the fan 1 as shown in FIGS. 1 and 4.
The front end surface 17' of the sealing material 17 on the inner surface of the fan guide 16 attached to the bearing 12 is connected to the peripheral edge of the air blowing opening 10' of the condenser case 10. The planar contact bearing 12 is assembled into the mounting hole 1'' of the bracket 1' by tightening and fixing it with bolts, nuts, etc. by contacting or press-welding the bearing 12 with the bracket 1'.

The bearing mounting hole 1'' of the bracket 1' is configured as an elongated hole, and the fan guide is fixed to the bearing 12 side, so if the V-belt stretches, loosen the bolts, nuts, etc. and adjust the area within the elongated hole. By shifting the bearing 12 in the direction away from the compressor 2 to apply a predetermined tension to the V-belt, and tightening and fixing it at that position, it is possible to easily absorb the elongation of the V-belt and adjust the tension.

In addition, when the mounting position of the bearing 12 is shifted in this way, the fan 14, the fan guide 16, and the sealing material 1
7 remains the same, and since the diameter of the air blowing opening 10' of the condenser case 10 is larger than the diameter of the fan 14, the displacement of the bearing mounting position can be sufficiently absorbed by the difference in diameter.

Furthermore, even if the blade tips of the fan 14 are in contact with the inner surface of the sealing material made of a sponge-like soft synthetic resin, there is no risk that the blade tips will be damaged during operation or that rotation will be adversely affected. 17
The gap can be easily set to zero or very close to zero, and fan noise can be reduced and air blowing efficiency can be significantly improved.

As described above, the present invention has an extremely simple configuration that eliminates the need for a tension pulley, resulting in a reduction in the number of parts, weight, and significant cost reduction, as well as reduction in fan noise. and can also improve ventilation efficiency,
Furthermore, since the relationship between the fan and the fan guide is set accurately in advance, assembly is extremely easy, and the wrapping angle of the V-belt around the pulley does not become small, improving power transmission efficiency and reducing bearing load. This can bring about many practical effects, such as being able to reduce the

It goes without saying that the present invention can be applied not only to condenser cooling fans, but also to all types of fans used in air-conditioning systems and driven by pulleys, V-belts, etc., such as evaporator fans, liquid receivers, compressor cooling fans, etc. stomach.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, where Figure 1 is a schematic overall plan view, Figure 2 is a schematic front view of Figure 1, and Figure 3 is a sectional view taken along line A-A in Figure 2. , FIG. 4 is a sectional view taken along the line BB in FIG. 3. Figures 5 and 6
The figures are a schematic plan view and a schematic front view of a conventional device. 1...Frame, 1'...Bracket, 1''...
Mounting hole, 2... Compressor, 3, 4, 9, 13
...Pulley, 5...Evaporator case, 6...
Evaporator, 7...Multi-blade fan, 10...Condenser case, 10'...Blower opening, 11...
... Capacitor, 12 ... Bearing, 14 ... Axial flow fan, 15 ... Support material, 16 ... Fan guide, 1
7...Sealing material.

Claims (1)

[Scope of utility model registration request] A fan guide that surrounds the outer periphery of the fan is fixed to the bearing of the fan that is installed in the cooling device and is driven from a power source via a pulley and a belt via a support material,
A sealing material made of a soft synthetic resin is attached to the inner peripheral surface of the fan guide over the entire circumference with its front end surface protruding forward from the front end surface of the fan guide, and the gap between the sealing material and the tip of the fan is reduced to zero or zero. The bearing is assembled and configured in a state close to that of the sealing material, and the front end surface of the sealing material is in planar contact with the periphery of the air blowing opening having a diameter larger than the inner diameter and smaller than the outer diameter of the sealing material. A fan mounting structure for a vehicle cooling system, characterized in that the fan is movably attached to the bearing mounting hole of a fixed member having a bearing mounting hole formed of an elongated hole in a direction perpendicular to the rotational axis of the fan.