JPH0517379Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a radiator thermal distortion prevention structure for a radiator in a vehicle or the like.

[Conventional technology]

Generally, the structure of a normal radiator is as shown in FIGS. 3 and 4. In FIG. 3, side plates 2 are fixed to both sides of the radiator 1 by soldering, as indicated by reference numeral 15. Radiator 1 has upper tank 1
3 and a lower tank 16, both tanks 13, 1
6 are connected by tube 17. Fins 14 are attached between each tube 17.

FIG. 4 is an enlarged view of the part marked A in FIG.
As shown by reference numeral 15, it is fixed by soldering or the like. The tube 17 is fixed to an end plate 19 constituting the upper tank 13 by soldering or the like, as shown at 18.

The radiator configured as described above is installed in front of the engine, and a fan is installed between the radiator and the engine. Further, a backflow prevention plate is attached between the side plate attached to the radiator and the cab floor. Therefore, the vehicle is configured so that the air flowing through the vehicle effectively flows through the radiator, the fan, and then the engine.

The structure of the radiator constructed as described above is, for example, as described in Japanese Utility Model Application Laid-open No. 56-128985.

To give an overview of the radiator disclosed in the publication, the structure of the radiator consists of an upper and lower tank with a plurality of positioning protrusions for the mounting member on the end surface, and a core part with fins attached between the liquid passage pipes, soldered to the upper and lower parts. After attaching, the mounting members are assembled on both sides of the upper and lower tanks by engaging the holes provided on the upper and lower end surfaces of the mounting member with the protrusions of the upper and lower tanks, and the solder is injected into the gap between the protrusion and the hole of the upper and lower tanks, and the holes are inserted into the upper and lower tanks. This is a radiator in which the joint surfaces of the mounting member and the mounting member are soldered.

Furthermore, in order to effectively utilize the space within the engine room, a system has been disclosed in which a reserve tank is integrated with tanks such as an upper tank and a lower tank into a radiator core. For example, as such,
-There is one disclosed in Publication No. 127192.

To give an overview of the structure of the radiator disclosed in the publication, the radiator has a pressure cap on the filler neck installed in the tank of the radiator, and a reserve cap with a bracket at a predetermined position. This is a radiator in which a tank is installed and the reserve tank is in contact with an overflow pipe provided in the filler neck section through a reserve pipe.

[Problem that the invention attempts to solve]

However, in the radiator shown in FIGS. 3 and 4 and the structure of the radiator disclosed in the above-mentioned Japanese Utility Model Publication No. 56-128985, there is a problem between the radiator tank and the side plate and the end plate. Soldering is performed between the tube and the tube.

Generally, regarding radiators in vehicles,
As a problem with the strength of radiators, there is the problem of cracks in the soldered parts due to thermal strain. This will be discussed in more detail with reference to FIGS. 3 and 4.

In FIG. 3, side plates 2 are attached to both sides of the radiator 1 by soldering, as indicated by reference numeral 15. The radiator 1 has an upper tank 13 and a lower tank 16,
Both tanks 13, 16 are connected by a tube 17. A large number of fins 14 are attached between each tube 17.

FIG. 4 is an enlarged view of the portion A in FIG. 3, in which the side plate 2 is fixed to the wall surface of the upper tank 13 by soldering or the like, as indicated by the reference numeral 15. Tube 17 is the upper tank 1
As shown by reference numeral 18, it is fixed to an end plate 19 constituting part 3 by soldering or the like.

This crack in the soldered part is caused by the temperature of the tube 17 through which the cooling water heated by heat radiation from the engine, for example cooling water heated to 80°C to 100°C, comes into contact with the wind generated when the vehicle is running. The soldering portion 15 between the side plate 2 and the upper tank 13 and the soldering between the end plate 19 and the tube 17 are caused by the difference in thermal expansion caused by the temperature difference between the radiator 1 and the side plate 2, which does not rise much. There is a problem in that thermal stress is applied to the soldered portion 18, sometimes causing cracks in the soldered portion 18, resulting in water leakage and the like.

In particular, under conditions of low atmospheric temperature, when the vehicle stops in an idling state after driving for a considerable distance, and subsequently starts driving again at full load, the cooling water in the radiator 1 may The temperature rose rapidly, and the side plate 2 was warmed to a certain degree by the engine's idling state.
As the air is taken in, the temperature of the area is cooled by the air and drops rapidly. Therefore, the side plate 2 and the upper and lower tanks 13, 1 of the radiator 1
6, the thermal distortion becomes even more remarkable.

In FIG. 4, reference numeral B indicates the direction of contraction of the side plate 2, reference number C indicates the direction of expansion of the tube 17, and reference number D indicates the direction of expansion of the wall portion of the upper tank 13.

Furthermore, in the structure of the radiator disclosed in the above-mentioned Japanese Utility Model Publication No. 57-127192, the reserve tank is attached close to the side plate; however, the temperature of the cooling water in the reserve tank is The temperature is as low as about 60°C to 70°C.

Therefore, even if an attempt is made to raise the temperature of the side plate, the temperature of the side plate cannot be raised to the desired temperature. cannot be achieved, and it still cannot solve the problem of thermal distortion between the radiator tank and the side plate.

Therefore, the purpose of this invention is to solve the above problems.The temperature of the side plate decreases due to the wind when the vehicle is running, and the temperature between the side plate and the tube and between the side plate and the radiator tank decreases. A radiator characterized by preventing thermal distortion occurring in the soldered portion between the tube and/or the tank and the end plate of the radiator due to the thermal expansion difference caused by the temperature difference, thereby improving the strength and durability of the radiator. The object of the present invention is to provide a structure that prevents thermal distortion.

[Means for solving problems]

In order to achieve the above object, this invention is constructed as follows. That is, this invention includes noise prevention shielding plates placed on both sides of the engine, a cab floor located outside of the radiator and the shielding plates placed in front of the engine, a side plate attached to the side of the radiator, and A state where the radiator extends from the front end portion of the shielding plate on the side of the side plate and is spaced along the outer surface of the side plate from behind the radiator, which guides the traveling air heated by the radiator against the surface of the side plate. The present invention relates to a radiator thermal distortion prevention structure having a baffle plate that bends and extends forward at a radiator.

Further, this radiator thermal distortion prevention structure includes a backflow prevention plate fixed to the front end of the side plate between the side plate and the cab floor to prevent the running wind from blowing through.

Further, this radiator thermal distortion prevention structure includes a fan disposed between the radiator and the engine;
and a fan guide installed behind the radiator and on the outer periphery of the fan in the radial direction.

Furthermore, in this radiator thermal distortion prevention structure,
The front end portion of the baffle plate is located behind and inside the fan guide.

[Effect]

The radiator thermal distortion prevention structure according to this invention is constructed as described above and operates as follows. That is, in this radiator thermal distortion prevention structure, the air guide plate extending from the front end of the side shielding plate of the side plate attached to the radiator is bent forward in a spaced manner from the rear of the radiator along the outer surface of the side plate. Since the radiator extends, the traveling wind heated by the radiator is reliably guided while hitting the surface of the side plate along the outer surface of the side plate.

Wind from the vehicle passes through the radiator and is heated by cooling water passing through a tube within the radiator. The heated running air is guided by the baffle plate, hits the surface of the side plate, conducts heat to the side plate, and reduces the temperature difference between the radiator and the side plate.

Therefore, the thermal expansion difference due to the temperature difference between the radiator and the side plate is reduced, preventing the generation of thermal stress, and reducing the thermal strain generated between the radiator and the side plate, especially at the soldered portion. can be prevented.

Further, since a fan guide is installed between the radiator and the engine, heated running air can reliably flow in contact with the surface of the side plate.

Furthermore, the backflow prevention plate installed between the side plate and the cab floor is fixed to the front end of the side plate, so that the side plate is prevented from being exposed to the wind that has not yet been heated by the radiator. There's no such thing as being chilled.

〔Example〕

Hereinafter, an embodiment of the radiator thermal distortion prevention structure according to this invention will be described in detail with reference to FIGS. 1 and 2. In FIGS. 1 and 2, a radiator 1 is installed in front of an engine 7. As shown in FIG. engine 7
The radiator 1 is attached to and supported by the chassis frame 8. engine 7 and radiator 1
A fan 5 is installed between the two. Noise prevention shielding plates 3 are installed on both sides of the engine 7, respectively. Each shielding plate 3 is fixed to a chassis frame 8.

Furthermore, side plates 2 are fixed to both side surfaces of the radiator 1, which connect an upper tank and a lower tank of the radiator 1. radiator 1
A fan guide 6 is installed at the rear of the side plate 2 and at the rear of the side plate 2. Therefore, the fan guide 6 is located on the outer periphery of the fan 5 in the radial direction.

A backflow prevention plate 4 is provided between the front end of the side plate 2 and a cab floor 9 located on the outer side of the radiator 1 and the shielding plate 3. A backflow prevention rubber 1 is attached to the side outer end of the backflow prevention plate 4.
1 is installed. The backflow prevention plate 4 is fixed to the side plate 2 by welding or the like. A backflow prevention rubber 11 is fixed to the backflow prevention plate 4 with resin rivets or the like. End 1 of backflow prevention rubber 11
1a is in contact with the cab floor 9 and prevents wind from blowing through when the vehicle is running.

The front end portion of the shielding plate 3 is bent into a substantially S-shape, as indicated by the symbol B in FIG. That is, the air guide plate formed by the front end portion of the shielding plate 3 is located behind the fan guide 6, that is, behind the radiator 1, and downstream of the fan 5, and the front end of the air guide plate approaches the side plate 2. The bent portion is then bent and extended forward along the outer surface of the side plate 2 in a state apart from the outer surface of the side plate 2. It is connected to the side shielding plate 3 part.

Therefore, the vehicle running wind blowing in from the front of the radiator 1 passes through the radiator 1 and is heated by the cooling water flowing through the tube inside the radiator 1, and a part of the heated running wind passes through the air guide plate. It is reliably guided by the air guide plate at the front end of the shielding plate 3 that constitutes it, hits the surface of the side plate 2, conducts heat to the side plate 2, and can reduce the temperature difference between the radiator 1 and the side plate 2. .

Although one embodiment of the radiator thermal distortion prevention structure according to this invention has been described in detail, the structure is not necessarily limited to this, and it is of course possible that the shielding plate and the baffle plate may be formed from separate members, for example. It is. Further, although the backflow prevention plate is constructed from two members, the backflow prevention plate 4 and the backflow prevention rubber 11, it is not necessary to be limited to such a configuration.
Of course, it can also be constructed from one member.

[Effect of idea]

Since the radiator thermal distortion prevention structure according to this invention is constructed as described above, it has the following effects. In other words, the tubes installed in the radiator are always heated to 80℃ to about 100℃ by the cooling water sent from the engine, and the running air that comes into contact with these tubes is heated to a certain degree, for example, about 70℃. ℃, and a portion of the heated traveling air is reliably guided to the baffle plate and guided along the outer surface of the side plate, so that there is no air between the side plate and the radiator, i.e. its core, etc. Therefore, there is almost no temperature difference between the side plate and the radiator, and no associated thermal expansion difference occurs.

Therefore, no thermal strain occurs between the side plate and the radiator, especially at the soldered portion. Further, since a backflow prevention plate installed between the side plate and the cab floor is fixed to the front end of the side plate, the side plate is prevented from being heated by the running wind that has not yet been heated by the radiator. never gets chilled.
Therefore, there is almost no difference in thermal expansion between the side plate and the radiator, and no thermal distortion occurs.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the radiator thermal distortion prevention structure according to this invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a front view showing the structure of a general radiator, and FIG. This figure is a cross-sectional view showing a portion indicated by the symbol A in FIG. 3. 1...Radiator, 2...Side plate, 3
... Shielding plate, 4... Backflow prevention plate, 5... Fan,
6...Fan guide, 7...Engine, 8...Chassis frame, 9...Cabin floor 10...
Cab, 11...Backflow prevention rubber.

Claims (1)

[Claims for Utility Model Registration] (1) Noise prevention shielding plates placed on both sides of the engine, a cab floor located outside of the radiator and the shielding plate placed in front of the engine, and attached to the side of the radiator. a side plate extending from the front end portion of the shielding plate on the side of the side plate and guiding the running wind heated by the radiator to the surface of the side plate from behind the radiator to the outer surface of the side plate; A radiator thermal distortion prevention structure having air guide plates that bend and extend forward while being spaced apart along the radiator. (2) The radiator heat distortion prevention device according to claim 1, which has a backflow prevention plate fixed to the front end of the side plate between the side plate and the cab floor to prevent the running wind from blowing through. structure. (3) The thermal strain radiator according to claim 1, which has a fan disposed between the radiator and the engine, and a fan guide disposed behind the radiator and on the outer periphery of the fan in the radial direction. Prevention structure. (4) The radiator thermal strain prevention structure according to claim 3, wherein the front end portion of the baffle plate is located behind and inside the fan guide.