JP2021146987A - Radiator device of automobile engine - Google Patents

Abstract

To easily connect a lower part of a fan shroud in a state that an abrasion phenomenon caused by sand does not occur, in a radiator device which is obtained by connecting an upper part of the fan shroud to a radiator main body in a non-fixable manner.SOLUTION: A connecting block part 13 is arranged at a lower end part of a fan shroud 2, a boss part 14 is formed protrusively from the connecting block part 13, and a receiving part 15 into which the boss part 14 fits is arranged at a radiator main body 1. A cylindrical upward salient part 15a is formed at the receiving part 15, and a frame part 20 surrounding the upward salient part 15a of the receiving part 15 is formed at the fan shroud 2. Since sand does not intrude into the receiving part 15 even if the sand is soared up from a road face, the wall-thinning of the boss part 14 and the receiving part 15 caused by abrasion does not occur even in a structure in which the boss part 14 and the receiving part 15 are merely fit to each other.SELECTED DRAWING: Figure 3

Description

The present invention relates to a radiator device for an automobile engine.

The engine of a four-wheeled vehicle is generally water-cooled, and a radiator device for cooling the cooling water is arranged in the front part of the engine room. The radiator device includes a radiator body (heat dissipation unit) and a fan shroud arranged behind the radiator body (heat dissipation unit).

And, in the case of the vertical type, the radiator body has a structure in which the upper tank and the lower tank are connected by a large number of tubes, and the cooling water flows from the upper tank to the lower tank, while the fan shroud. Is equipped with a fan driven by a motor, and the air sucked by the fan passes through a group of tubes to dissipate heat from the cooling water.

Conventionally, as a method of attaching the fan shroud to the radiator body, fastening with screws (bolts) has been performed, but this method has a problem of poor workability. Therefore, in Patent Document 1, the upper portion of the fan shroud and the radiator main body is connected by an engaging means (snap fit) utilizing deformation of the member, and the lower portion of the fan shroud and the radiator main body has a downward boss portion. A configuration is disclosed in which a vertically open type receiving portion is fitted so as to hold it so as not to shift in the horizontal direction.

Further, in Patent Document 1, while the boss portion is provided on the lower surface of the radiator main body, the receiving portion is projected forward at the lower part of the fan shroud, and the boss portion is displaced by attaching a rubber grommet to the receiving portion. Holds impossible.

Japanese Unexamined Patent Publication No. 2012-180751

If a rubber grommet is attached to the receiving portion as in Patent Document 1, the relative movement between the radiator body and the fan shroud can be reliably prevented, but there is a problem that the cost increases accordingly. Therefore, it is conceivable to adopt a structure in which the boss portion is loosely fitted to the receiving portion without using the grommet.

However, in this case, while the boss part and the receiving part move relative to each other due to the vibration caused by the running of the car, when the car is driven on an unpaved road, the sand particles rolled up from the road may enter the receiving part. When used for a long time in an area with many unpaved roads, the sand grains act as an abrasive and the boss part and the receiving part rub against each other to reduce the wall thickness, and eventually the boss part breaks. There is a problem that appears.

The present invention has been made to improve such a situation.

The radiator device of the present invention is
"It has a radiator body and a synthetic resin fan shroud placed behind it.
While the upper part of the fan shroud is non-fixed to the radiator body by snap-type engaging means, while
At the lower part of the fan shroud, a boss portion that is fitted from above into a vertically opening type receiving portion that protrudes backward from the radiator main body is provided, and the fan shroud is horizontal due to the fitting between the boss portion and the frame portion. It is held so that it does not move in the direction. "
In the configuration
"While the box-shaped upward protrusion is formed in the frame portion of the radiator body,
A frame portion surrounding the upward projecting portion of the receiving portion is formed at a portion of the fan shroud where the boss portion is provided. "
It has the feature.

Since the receiving part protrudes backward from the radiator body, the front part of the upward protruding part of the receiving part becomes the bridge part, but the upper surface of this bridge part should be tilted so that it slides down even if sand is placed on it. preferable. In this case, the inclination may be inclined to only one of the right or left, or may be formed in a chevron shape and inclined so as to be lowered on both the left and right sides.

In the present invention, since the receiving portion is surrounded by the frame portion (therefore, the boss portion is also surrounded by the frame portion), even if the sand particles fly up from the road while traveling on an unpaved road, the sand particles are surrounded by the receiving portion. It doesn't get in. Therefore, even if the boss part and the receiving part move relative to each other due to the running of the automobile, attrition does not occur, and even if the connection is made by simply fitting the boss part and the receiving part, the thickness of the boss part is reduced. The situation such as breakage due to the above does not occur, and the connected state can be maintained for a long period of time.

Therefore, in the present invention, even when the automobile is used for a long period of time in an area with many unpaved roads, the fan shroud and the radiator are kept in a state where the cost is suppressed while improving the efficiency of the assembly work of the radiator device. The state of connection with the main body can be maintained. As described above, when the upper surface of the bridge portion of the receiving portion is formed on an inclined surface, it is possible to prevent sand particles from accumulating on the bridge portion, and thus it is preferable to ensure the effect of preventing sand particles from entering the receiving portion.

In the figure which shows the embodiment, (A) is a rear view, (B) is a side view, (C) is a separated rear view, and (D) is a separated side view. (A) is a perspective view of the main part of the fan shroud seen from the rear lower part, (B) is a perspective view of the main part of the fan shroud seen from the front lower part, and (C) is a perspective view of the main part of the radiator body from the back. It is a perspective view. (A) is a vertical sectional front view of (B), (B) is a vertical sectional side view of BB of (A), and (C) is a vertical sectional view of CC of (B). Is.

Next, an embodiment of the present invention will be described with reference to the drawings. In the following, the words front and rear and left and right are used to specify the direction, but the front and rear are the same as the front and rear direction of the vehicle body, and the left and right direction is the vehicle width direction.

(1). Overview First, an overview will be described with reference to FIG. As shown in FIG. 1A, the radiator device includes a radiator main body 1 and a fan shroud 2 arranged behind the radiator main body 1. The radiator main body 1 has a structure in which the left and right longitudinal upper tanks 3 and lower tanks 4 are connected by a heat exchange unit (or heat exchange element) 5, and the heat exchange unit 5 is composed of a large number of vertically elongated metal fins. Has been done.

The upper tank 3 and the lower tank 4 are made of synthetic resin, and flange portions 3a and 4a for connecting the heat exchange unit 5 are formed in both of them. Further, the upper tank 3 has an inlet port 6 projecting rearward, and the lower tank 4 has an outlet port 7 projecting rearward.

The fan shroud 2 is a molded product of synthetic resin, and includes a rectangular base frame 8 when viewed from the front, and a fan holding frame 9 protruding rearward from the base frame 8. The fan holding frame 9 includes a cylindrical body 10 in which a fan (not shown) is rotatably arranged, and a center disk 12 connected to the cylindrical body 10 via a large number of bridge ribs 11. , A motor (not shown) is fixed to the center disk 12.

The radiator main body 1 is attached to the upper and lower support frames (radiator support: not shown) provided in the front portion of the vehicle body of the automobile, and the fan shroud 2 is attached to the radiator main body 1.

As a structure for attaching the fan shroud 2 to the radiator main body 1, first, an engaging protrusion (not shown) is projected forward on the upper portion of the base frame 8 constituting the fan shroud 2, while the radiator main body 1 is formed. An engaging hole (not shown) is provided in the upper part of the heat exchange unit 5, and the engaging projection is fitted into the engaging hole against its elasticity to be connected so as not to be disengaged backward.

Further, at the lower part of the base frame 8 constituting the fan shroud 2, two left and right connecting block portions 13 are formed so as to project rearward and downward, and the connecting block portion 13 is provided with a downward boss portion 14. The lower tank 4 of the radiator main body 1 has left and right receiving portions 15 projecting rearwardly, and the boss portion 14 is fitted into the receiving portion 15 from above. The connection of the upper part of the fan shroud 2 is not fixed, and the fan shroud 2 is suspended from the radiator main body 1 in a state where it can move up and down slightly.

(2). Lower connection structure Next, the details of the lower connection structure between the fan shroud 2 and the radiator main body 1 will be described with reference to FIGS. 2 and 3.

The connecting block portion 13 of the fan shroud 2 has a quadrangular shape when viewed from the rear, and forms a group of punched holes 16 for weight reduction. Therefore, the connecting block portion 13 has a grid-like shape when viewed from the rear. Then, the boss portion 14 is projected downward from the lower surface of the connecting block portion 13. The boss portion 14 is formed in a quadrangular cross-sectional shape extending left and right, and an inclined guide surface 17 is formed at the lower end thereof in order to guide the fitting into the receiving portion 15.

On the other hand, the receiving portion 15 provided in the lower tank 4 is formed with a square hole (engagement hole) 18 into which the boss portion 14 is fitted with a slight clearance. The upward protruding portion 15a is formed. Therefore, the portion between the upward protruding portion 15a and the lower tank 4 is the bridge portion 19. Then, the frame portion 20 that surrounds the upward projecting portion 15a of the receiving portion 15 is projected downward from the connecting block portion 13 of the fan shroud 2.

Therefore, the boss portion 14 is surrounded by the receiving portion 15, and the upward protruding portion 15a of the receiving portion 15 is surrounded by the frame portion 20 of the connecting block portion 13.

The upper surface of the bridge portion 19 in the receiving portion 15 is an inclined surface 19a that is lowered from one left and right end toward the other end. Correspondingly, the lower surface of the front plate 20a located above the bridge portion 19 of the frame portion 20 in the fan shroud 2 is also an inclined surface that is lowered from one left and right end to the other end.

The load of the fan shroud 2 is supported by the engaging projection on the upper part, and a slight gap is opened between the connecting block portion 13 and the receiving portion 15. Therefore, the boss portion 14 and the receiving portion 15 can move relative to each other in the vertical direction due to the vibration caused by the traveling of the automobile.

For this reason, if the boss portion 14 is simply fitted in the receiving portion 15, when traveling on an unpaved road, sand particles soaring from the road may enter the gap between the boss portion 14 and the receiving portion 15. Therefore, when traveling over an area with many unpaved roads for a long period of time, the sand grains may act as an abrasive and the boss portion 14 and the receiving portion 15 may be thinned. If the wall thinning progresses, the boss portion 14 may be broken or the receiving portion 15 may be damaged, resulting in a fallout accident of the fan shroud 2.

However, in the present embodiment, since the receiving portion 15 is provided with the upward protruding portion 15a and is surrounded by the frame portion 20 of the connecting block portion 13, even if sand particles fly up from the road, they enter the square hole 18 of the receiving portion 15. Therefore, although it has a simple structure that does not use grommets, it is possible to prevent the boss portion 14 and the receiving portion 15 from being thinned and maintain the connected state.

When the upper surface of the bridge portion 19 in the receiving portion 15 is formed on the inclined surface 19a as in the embodiment, even if the sand particles fly to the upper surface of the bridge portion 19, the sand particles flow down the inclined surface 19a, and the sand grains flow down. Does not stay on the inclined surface 19a of the bridge portion 19. Therefore, it is possible to further ensure that the boss portion 14 and the receiving portion 15 are prevented from being worn.

Although the embodiments of the present invention have been described above, the present invention can be embodied in various ways. For example, the boss portion is not limited to a square shape (square rod shape) and may have a columnar shape. Further, the arrangement positions of the boss portion and the receiving portion are not limited to two on the left and right, and may be one or three or more.

Further, in the embodiment, the boss portion and the frame portion are projected from the connecting block portion, but the boss portion and the frame portion are provided on the flange plate protruding rearward from the fan shroud, or the boss portion and the frame are provided on the lower surface of the fan shroud. It is also possible to provide a part.

The present invention can be embodied in a radiator device for an automobile engine. Therefore, it can be used industrially.

1 Radiator body 2 Fan shroud 3 Upper tank 4 Lower tank 5 Heat exchange unit 8 Fan shroud base frame 9 Fan holding frame 13 Connecting block part 14 Boss part 15 Receiving part 15a Upward protruding part 18 Square hole 19 Bridge part 20 Frame part

Claims (1)

It has a radiator body and a synthetic resin fan shroud placed behind it.
While the upper part of the fan shroud is non-fixed to the radiator body by snap-type engaging means, while
At the lower part of the fan shroud, a boss portion that is fitted from above into a vertically opening type receiving portion that protrudes backward from the radiator main body is provided, and the fan shroud is horizontal due to the fitting between the boss portion and the frame portion. It is a configuration that is held so that it does not move in the direction,
While a cylindrical upward protrusion is formed in the frame portion of the radiator body,
A frame portion surrounding the upward projecting portion of the receiving portion is formed at a portion of the fan shroud where the boss portion is provided.
Radiator device for automobile engines.

Images