JPS593139Y2 - Structure of the mounting part of the radiator shroud - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of an attachment part for attaching a shroud to the back of a radiator.

In order to efficiently guide air passing through the core of the radiator to a cooling fan, it is widely used to attach a roughly funnel-shaped shroud to the back of the radiator.

That is, as shown in FIG. 1, a roughly funnel-shaped shroud 3 is fixed to the back of the radiator 1, covering the leeward opening of the core portion 2 of the radiator.

Such a shroud 3 functions to guide the air passing through the core portion 2 so that it is effectively sucked into the fan 4,
It serves to improve the cooling efficiency of the radiator.

By the way, conventionally when such a shroud is attached to the back of the radiator, the flange 3a formed at the end of the shroud 3 is attached to the side support fixed to the radiator 1.
(not shown), and was fixed to the upper and lower tanks 5, 5a constituting the radiator 1 with bolts, nuts, etc.

However, in recent years, as efforts have been made to reduce the weight of various parts of automobiles, side supports have become omitted, and the upper and lower tanks 5, 5a have come to be made of synthetic resin.

For this reason, when attaching the shroud 3 to the radiator 1, it has become necessary to attach the shroud 3 directly to the rear surface of the synthetic resin tanks 5, 5a.

Therefore, conventionally, when molding the tank 5.5a from resin, a bolt or nut is embedded in the rear surface of the tank 5, 5a, and the flange portion 3a of the shroud 3 is attached to the tank by the nut or bolt that is threaded with the bolt or nut. 5,5
The shroud 3 was attached to the back of the radiator 1 by fixing it to the rear back surface of the shroud 3.

However, the work of embedding bolts and nuts when molding the tanks 5 and 5a is not only troublesome and increases costs, but also requires embedding metal bolts or nuts within the synthetic resin tank wall. Therefore, when the temperature of the cooling water in the tanks 5, 5a increases, cracks may occur on the tank wall due to the difference in thermal expansion coefficients between the two.

The present invention aims to provide a structure for a radiator shroud attachment part that eliminates the above-mentioned disadvantages.

Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

FIG. 2 shows an exploded view of the structure of the mounting portion of the present invention.

A recessed portion 7 is formed in a portion of the rear surface 6 of the tank 5 corresponding to the shroud attachment portion, and a flat vertical vertical wall 8 is formed integrally with the tank 5 on the rear side of the recessed portion 7. .

The vertical wall 8 has an inverted keyhole-shaped notch 9 formed from a circular hole 9a and a notch 9b continuous above the circular hole 9a.

Here, the width α of the recessed portion is 10 mm for the shroud mounting bolt.
The width β of the notch portion 9b is approximately the same as or slightly larger than the width a of the head portion 10a of the bolt 10.
formed to the extent that it can pass through.

Reference numeral 11 denotes a collar for preventing the bolt 10 from coming off due to vibration etc. after it is connected to the tank 5, and has an outer diameter that allows it to fit into the circular hole 9a without rattling, and a collar 10 of the bolt 10.
It is formed into a short cylindrical shape with an inner diameter into which the holder b can be inserted.

On the other hand, the shroud 3 is provided with a bracket 12 having a circular hole 12 a large enough to allow the rod portion 10 b of the bolt 10 to be inserted therethrough.
is fixed.

In the illustrated example, the bracket 12 is formed separately from the shroud 3 and is fixed to the shroud 3, but of course it may be integrally formed with the shroud 3, in which case the shroud It is also possible to directly drill the circular hole 12a in the flange portion 3a of No.3.

In addition, 13 is a spring washer, and 14 is the bolt 1.
It is a nut that is screwed together with 0.

Next, a procedure for attaching the shroud 3 to the rear surface 6 of the tank 5 in the above configuration will be explained.

First, the bolt 10 is vertically lowered from the state shown in FIG. Insert into space.

Next, the collar 11 is fitted into the annular gap formed between the outer peripheral surface of the rod portion 10b of the bolt 10 and the inner peripheral surface of the circular hole portion 9a of the notch 9 (FIGS. 3 and 4).

As a result, the bolt 10 cannot be removed from the tank 5, so next, insert the circular hole 12a of the bracket 12 fixed to the shroud 3 into the round hole 12a of the bracket 12 fixed to the shroud 3 and the spring washer 13, and finally tighten the nut 14. For example, the shroud 3 is firmly attached and fixed to the rear surface of the tank 5.

At this time, the head 10a of the bolt 10 is held in the recess 7 so as not to rotate, so that the nut 14 can be tightened easily.

In addition, in the above embodiment, an example was described in which an inverted keyhole-shaped notch 9 was formed in the vertical wall 8 and the bolt 10 was prevented from coming off from the notch 9 by a short cylindrical collar 11. However, the structure for preventing the bolt 10 from coming off is not limited to this. For example, the collar 11 may be semi-cylindrical as shown in FIG. As shown in the figure, the inverted table has a notch 9 formed in a U-shape, locking grooves 15, 15 formed on both left and right sides of the notch 9, and both ends of the notch 9 being locked in the locking grooves 15 and 15. The bolt 10 can also be prevented from being pulled out by the shaped spring 16.

Further, in each of the above embodiments, the head 10a of the bolt 10 is inserted into the recess 7, but a nut 14 may be inserted into the recess 7 instead of the bolt.

In this case, the cutout 9 may be a simple through hole, and the collar 11 is not necessary.

It goes without saying that the length of the bolt 10 that is screwed into the nut 14 is determined in advance to an appropriate length so as not to damage the rear surface of the tank 5.

Since the structure of the mounting part of the radiator shroud of the present invention is constructed and assembled as described above, (1) There is no need to embed bolts or nuts when molding a resin tank, so the tank can be manufactured easily. It's easy.

(2) There is no possibility of cracks occurring on the tank wall due to the difference in thermal expansion between bolts or nuts and the resin tank.

(3) Since the bolts are attached to the tank after the radiator is assembled, the bolts do not interfere with the work of tightening the seat plate, etc., during the radiator assembly.

(4) As a result of the above, the cost of the product can be reduced.

etc., have great practical effects.

[Brief explanation of the drawings] Figure 1 is a schematic side view of the radiator with the shroud attached;
Fig. 2 is an exploded perspective view showing the first embodiment of the structure of the mounting part of the present invention, Fig. 3 is a view corresponding to the A-A cross section of Fig. 2 showing the state in which the bolt is assembled to the tank, and Fig. Figure 4 is B in Figure 3.
-B sectional view and FIGS. 5 and 6 are views similar to FIG. 4 showing second and third embodiments of the present invention, respectively. 1...Radiator, 3...Shroud, 3a...Flange part, 5, 5a...
Tank, 6... Rear surface, 7... Recessed part, 8... Vertical wall, 9... Notch, 10.
...Pol I...10 a...Head, 10
b... stem section, 12... bracket,
12 a... circular hole, 14... nut.

Claims (3)

[Scope of utility model registration request] (1) A recessed portion 7 capable of housing the head 10a of the bolt 10 or the nut 14 is formed on the rear surface 6 of the tanks 5, 5a of the radiator 1, and a flat plate-shaped standing wall 8 is provided on the rear side of the recessed portion 7. 5, and a bolt 10 is attached to the vertical wall 8.
A notch 9 is formed through which the rod portion 10b of the bolt 10 can be inserted, and the rod portion 10b of the bolt 10 is inserted through the notch 9 and the circular hole 12a of the bracket 12 provided in the shroud 3 to be screwed with the nut 14. Structure of the mounting part of the radiator shroud. (2) The structure of the mounting part of a radiator shroud according to claim 1 of the utility model registration, characterized in that the head 10a of a bolt 10 is inserted into the recessed part 7. (3) The structure of the mounting portion of a radiator shroud according to claim 1 of the utility model registration, characterized in that a nut 14 is inserted into the recessed portion 7.