JPH01296093A - Automotive radiator - Google Patents

Abstract

PURPOSE:To reduce the total height of a water pouring port and permit the reduction of the height of a front part, by a method wherein a breezer pipe and a cap guide are provided on the outer wall of an outer tube at places between the upper end rim of the outer tube forming the water pouring port and the top surface of the annular sealing part of the outer tube in order to minimize the height of the water pouring port. CONSTITUTION:An outer tube sealing part 33 is formed on the upper end rim of the outer tube 24 while cap guide members 34, 35 are formed on the outer peripheral wall of the top of the outer tube so as to be projected. The catch pawl 40 of a cap 25 is guided by a cap guide and is tightened gradually by guiding it from a narrow part 36 to a wide part 37 while it is stopped by a breezer pipe 26 which serves as a stopper. According to this method, the height of the outer tube may be reduced by a size corresponding to the sum of a size of distance, through which the cap pawl passes upon fitting it to a water pouring port, and the size of the height of the cap stopper in a height from the top of the annular sealing part to the lowest part of the inner periphery of the breezer pie and a height from the uppermost part of the outer periphery of the pipe to the upper end rim of the water pouring port.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a radiator for an automobile in which the overall height of the water inlet portion is reduced in order to reduce the height of the front portion of the automobile.

[Conventional technology]

An automobile radiator consists of a water inlet section consisting of an upper tank and a water inlet, a lower tank, and a tube that communicates the upper tank and lower tank. The configuration of the water inlet of the radiator is as shown by reference numeral 14 in FIG. 8. The upper tank 2 that introduces cooling water from the engine has an upper tank main body 2a made of synthetic resin to which the inlet pipe 1 is connected on the side. A core plate 2b that closes the lower end of the upper tank body 2a, and an annular seal portion 4 connected to the upper tank body 2a.
It consists of a cylindrical tube 3 having a water inlet 6 on its top surface, and an outer cylindrical tube 5 that is connected to the outer wall of the cylindrical tube 3 and forms a water inlet 6 at the top. 7 is provided. Furthermore, a breather pipe 9 is protruded from the side of the outer tube 5 and has one end opened into the outer tube 5 and the other end communicated with a reserve tank (not shown). A cap guide 8 is provided for fitting the cap.

In the upper tank 2, a core plate 2b to which a tube 10 for flowing cooling fluid in the upper tank 2 toward the lower tank is connected is caulked to a leg portion 12 protruding from the outer peripheral edge of the lower end of the upper tank body 2a. It is attached and formed by. An O-ring 13 is interposed between the foot portion 12 and the core plate 2b to maintain watertightness.

2, from the foot 12 of the upper tank 2 to the inlet pipe 1
The height to the bottom of the outer periphery is h. , the wall thickness of the inlet pipe 1 is T, the inner diameter of the inlet pipe 1 is D, the height from the top of the inner circumference of the inlet pipe 1 to the annular seal part 4 of the cylindrical pipe 3 is hi, and the height of the breather pipe 9 from the annular seal part is The height to the bottom of the inner circumference is h2, the inner diameter of the breather pipe 9 is d, the wall thickness of the breather pipe 9 is t, the breather pipe 9
If the height from the top of the outer periphery to the outer cylinder seal part 7 of the outer cylinder pipe 5 is h4, the total height H of the water inlet part 14 of the radiator is: H=h, +'r+o+ht+hz+h. +h.

(However, h, = t + d).

[Problems to be Solved by the Invention] From the standpoint of improving the aerodynamic characteristics of automobiles, there is a demand for body designs that reduce the height of the front section of automobiles, and accordingly, it is desirable to reduce the overall height of the radiator. ing.
Therefore, in order to reduce the overall height of the radiator,
It is possible to reduce the overall height H of 4. However, the cap that seals the water inlet 6 of the water inlet part 14 has a pressure regulating valve and a negative pressure valve arranged on the back side, and these valves are inserted into the water inlet 6 so that the packing of the pressure regulating valve becomes a cylindrical pipe. When the cooling water in the radiator is heated and expands, the packing of the pressure regulating valve is seated on the annular seal portion 4 formed at the top of the radiator due to the elasticity of the spring.
When the temperature of the cooling water in the radiator drops and the pressure inside the radiator becomes negative, the negative pressure valve opens and the cooling water in the reserve tank is released. It acts to return some of the water into the radiator. Therefore, when the water inlet 6 is sealed with the cap, a pressure corresponding to the biasing force of the spring is applied inside the radiator, so when the cap is removed to inspect the cooling water inside the radiator, the pressure inside the radiator is In order to prevent the cooling water from overflowing from the water inlet 6, the heights hl and h included in the total height H must be hi≧0 and h, respectively.
, ≧O.

In addition, as shown in FIG. 9, in order to attach the cap 15 to the water inlet 6, a cap guide 8 and a breather pipe 9 are required.
A certain distance or more is required to allow the catch claw 16 to pass through. Furthermore, in order to caulk the core plate 2b to the foot portion 12 of the upper tank body 2a,
The height h6 is also required to be greater than a certain level. From these facts, assuming that h1=0 and h2=0, the minimum total height H in of the water inlet portion 14 is Hmin=h,+T+D+h,+h4 (=t+d).

However, in order to meet the demand for lowering the height of the front part in order to further improve the aerodynamic characteristics of automobiles, in such conventional configurations, the values of T, D or t, d in the above formula are changed. Make it smaller, i.e.
There is no choice but to reduce the diameter or thickness of the inlet pipe 1 or breather pipe 9, and reducing the diameter or thickness of the pipes of these vibrators causes problems such as reduced heat dissipation performance and reduced strength of the radiator. was.

Therefore, the present invention provides a radiator with a low overall height without reducing the heat dissipation performance or strength of the radiator.

[Means for Solving IIIM] The present invention provides an inlet pipe that is provided in a side wall of the upper tank with a protruding opening so that the cooling fluid introduced from the engine through the inlet pipe is received into the upper tank. -The top wall of the sumo wrestler tank is provided with a cylindrical outer tube that projects upward and opens into the upper tank, and opens at the upper end to form a water inlet to the upper tank.-
1 One end of this outer cylindrical pipe is provided with a protruding opening, and the other end of the breather pipe is configured to communicate with a reserve tank that stores a portion of the cooling fluid, and a pressure regulating valve and a negative pressure valve are arranged on the back side. The pressure regulating valve and the negative pressure valve are inserted into the water inlet of the outer tube, the packing of the pressure regulating valve is seated on the annular seal formed in the outer tube, and the cap is attached to the top outer circumferential wall of the outer tube. By locking a catch claw formed on the cap with a cap guide that is arranged along the circumferential direction of the outer cylindrical tube and protrudes radially outward with respect to the central axis of the outer cylindrical tube. The present invention relates to a radiator for an automobile equipped with a water inlet portion that seals the water inlet of the outer cylindrical pipe, and the object of the present invention is to provide a radiator with a low overall height without reducing the heat dissipation performance or strength of the radiator. In order to achieve this, the annular seal portion on which the packing of the pressure regulating valve disposed in the cap is seated is placed in a plane perpendicular to the center axis of the outer tube, concentrically with the center axis of the outer tube. is formed integrally with the inner circumferential wall of the lower end of the annular seal, and a surface including the top of the annular seal is in the same plane as the lowermost end of the opening of the breather pipe to the inner wall surface of the outer tube, and The cap guide formed on the outer circumferential wall of the cap includes a narrow portion having a smaller width in a direction parallel to the central axis of the outer cylindrical tube, and a wide portion having a larger width in the direction parallel to the central axis of the outer cylindrical tube. at least two guide members disposed at a distance greater than the width of the catch pawl along the pipe, and one of the guide members has an end of its wide portion very close to the breather pipe. The height from the top surface of the annular seal portion of the outer cylindrical tube to the upper edge forming the water inlet, the inner diameter d of the breather pipe, the wall thickness t of the breather pipe, and the cap guide. The sum of the heights C' from the lower edge of the narrow part to the top of the outer cylindrical pipe, or in addition to the above structure, the uppermost end of the inlet pipe at the opening to the upper tank side wall. is arranged in the same plane as a plane including the top of the annular seal part.

[Example] An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing the automobile radiator of this embodiment.The side wall of the upper tank body 21a of the upper tank 21, which is molded from synthetic resin or the like, has a structure for receiving high-temperature cooling fluid from the engine. An inlet pipe 22 is integrally attached, and a cylindrical outer tube 24 is provided on the top wall of the upper tank main body 21a and has a water inlet 23 at the top for replenishing cooling water into the upper tank 21. A cap 25 is fitted onto the upper end of 24. Further, the outer tube 24 includes a breather pipe having one end penetrating the side wall of the outer tube 24 and opening into the outer tube 24, and the other end communicating with a reserve tank (not shown). 26 is inlet pipe 2
2 and is provided almost parallel to each other.

Core plate 2 that closes the lower end of the upper tank body 21a
One end of a plurality of tubes 27 is connected to 1b, and the other end of the plurality of tubes 27 is connected to a lower tank 28 molded from synthetic resin. Between the plurality of tubes 27, wavy fins 29 connect each tube. Further, an outlet pipe 30 is attached to the lower tank 28 so that the cooling fluid flowing into the lower tank 28 from the upper tank through the tube 27 flows out again towards the engine.

In addition, the core plate 21b is 0 as shown in FIG.
It is fluid-tightly fixed to the upper edge of the upper tank body 21a by caulking with a ring interposed therebetween. The same applies to the fixation between the lower tank main body 28a of the lower tank 28 and the core plate 28b.

Tube 27 is connected between core plates 21b and 28b.

Next, there is a water inlet portion of an automobile radiator according to the present invention.

In particular, the outer cylindrical pipe portion forming the water inlet will be explained with reference to one drawing.

Figure 2 is a front view of the outer tube, Figure 3 is its top view, Figure 4 is a sectional view of the cap, Figure 5 is a front view of the outer tube (water inlet) with the cap fitted, and Figure 5 is a front view of the outer tube (water inlet). Figure 6 is a sectional view of the main part.

An outer cylinder seal part 33 is formed at the upper end edge of the outer cylinder tube 24, and two cap guide members 34 and 35 are installed along the circumferential direction on the top outer circumferential wall of the outer cylinder tube 24. It is formed so as to protrude radially outward with respect to the shaft. The cap guide members 34 and 35 include a narrow portion 36 having a smaller width in a direction parallel to the central axis of the outer tube 24, a wide portion 37 having a larger width, and these narrow portions 36. A curved portion that gently connects the lower edge 38 with the wide portion 37 is provided.

In addition, in this embodiment, from the narrow part 36 to the wide part 37
Although the lower edge between the two is curved, the narrow portion 36 may have a straight line shape. 38 gradually becomes wider so that the catch pawl 40 can be smoothly moved to the wide portion 37. The width dimension of the wide portion 37 of the cap guide member 34.35 is such that the catch claw 40 of the cap 25 is
When the cap 25 is engaged with the lower edge of the wide part 37, the rubber ring attached to the back surface of the cap 25 or the protruding sealing member 41 comes into close contact with the outer cylinder seal part 33, and the cap 25 closes to the top of the outer cylinder tube 24. The length is set to liquid-tightly close the water inlet 23 formed in the . The cap guide members 34 and 35 have a width that allows the catch claw 40 of the cap 25 to pass in the circumferential direction of the outer wall of the outer tube 24;
That is, they are formed symmetrically through a notch 39 having a width larger than the width of the catch pawl 40 along the circumferential direction of the cap 25 . One of the longitudinal ends (34 in the drawing) of the cap guide members 34 and 35, which is the edge on the one wide portion 37 side, is disposed extremely close to the breather pipe 26. In this embodiment, the end of the wide part 37 reaches the center of the breather vibe 26, and the end of the wide part 37 reaches the center of the breather vibe 26.
6. Forms an arcuate shape corresponding to approximately 1/4 of the circular outer peripheral surface. Further, the top position of the outer circumference of the breather pipe is approximately the narrow lower end position of the guide member.

Further, an annular seal portion 31 is formed at the lower end of the inner circumferential wall of the outer cylindrical tube 24, as shown in FIG. The annular seal portion 31 is arranged in a plane perpendicular to the central axis of the outer tube 24.
4 and integrally formed with the outer cylindrical tube 24 concentrically with the central axis of the tube.

The lowermost end of the breather pipe inner circumference at the opening of the breather pipe 26 to the inner circumferential surface of the outer cylindrical pipe 24 (inside the water inlet 23) and the top of the annular seal portion 31 are configured in the same plane. Further, the uppermost end of the inlet pipe 22 at the opening to the side wall of the upper tank 22 is also configured in the same plane as the top of the annular seal portion 31.

A cap 25 is fitted onto the top of the outer cylindrical tube 24 constructed in this manner.

The cap 25 has a catch claw 40 protruding from its lower edge,
A pressure regulating valve 44 and a negative pressure valve 45 are arranged on the back surface thereof.

A spring 43 is interposed between the packing 46 of the pressure regulating valve 44 and the cap 25.

The negative pressure valve 45 is provided in the packing 46, and the packing 48 is elastically contacted with the packing 46 by a spring 47. First, the catch claw 40 of the cap 25 is inserted into the notch 39 between the cap guide members 34 and 35,
The pressure regulating valve 44 and the negative pressure valve 45 are inserted into the inside of the outer cylindrical pipe 24 (inside the water inlet 23). Packing 4 of pressure regulating valve 44
6 is seated on the annular seal portion 31 at the lower end of the inner circumferential wall of the outer cylindrical tube 24, and then the cap 25 is rotated. Catch claw 4
0 is guided by the lower edge 38 of the cap guide member 34, 35 from the narrow part 36 to the wide part 37. During this time, the packing 46 is gradually pressed against the annular seal portion 31 by the elasticity of the spring 43. When the cap 25 is further rotated, the catch pawl 40 hits the breather pipe 26 and stops (the state shown in Fig. 5). The catch claw 40 of 25 maintains a stopped state by the outer peripheral edge of the breather pipe 26 and the end of the cap guide member 34, and
A packing 46 fluid-tightly presses the opening into the annular seal portion 31 to seal the opening. At the same time, on the back surface of the cap 25, a rubber ring or a sealing member 41 is brought into close contact with the outer tube seal portion 33, and fluid-tightly closes the water inlet 23 at the top of the outer tube 24. When the automobile engine is operated and the cooling fluid is heated and increases in volume, the pressure inside the radiator increases and pushes up the valve plate 46 of the pressure regulating valve 44 against the elasticity of the spring 43.
A portion of the cooling fluid in the radiator is transferred to the breather pipe 26.
It drains into the reserve tank through. When the temperature of the cooling fluid in the radiator decreases and its volume decreases, the pressure in the radiator decreases and pushes down the packing 48 of the negative pressure valve 45 against the elasticity of the spring 47, causing the breather pipe 26 to be removed from the reserve tank. The cooling fluid is returned to the upper tank 21 through the upper tank 21.

Further, the breather pipe 26 is part of a cooling fluid passage between the upper tank 21 and the reserve tank, and also serves as a stopper for the catch claw 40 of the cap 25.

Next, the structure of the outer cylindrical tube of the present invention having the above configuration and the conventional outer cylindrical tube structure are illustrated in FIG. Compare with reference to Figure 7.

The height from the top of the annular seal portion 4 of the cylindrical tube 3 of a conventional radiator to the upper edge forming the water inlet.

The height h2 from the top of the annular seal portion 4 to the bottom of the inner circumference of the breather pipe 9, the height h which is the sum of the inner diameter d of the breather pipe 9 and the wall thickness t of the breather pipe 9, and the height h of the breather pipe 9'. The sum of the heights from the top of the outer periphery to the upper edge of the water inlet 6 formed at the top of the outer cylindrical tube 5.

Here, if the height h4 from the top of the outer periphery of the breather pipe 9 to the upper edge of the water inlet is subdivided, the cap is
The distance A required for the catch pawl to pass when fitting the cap, the height B of the cap stopper 17 provided on the cap guide 8 to stop the cap and maintain that state, and the cap stopper of the cap guide 8. The height from the top of No. 17 to the top of the water inlet is C. That is, in this case, the height from the top surface of the annular seal portion 4 to the upper edge of the water inlet is (h, +h, +A+B+C).

Next, let us consider the height from the top surface of the annular seal portion of the radiator of the present invention to the upper end edge of the outer cylindrical tube 24.

Since the breather pipe 26 also serves as a cap stopper, there is no cap stopper (B=O).

Furthermore, when fitting the cap onto the outer tube 24.

Since the catch pawl 40 is not allowed to pass through the upper part of the breather pipe 26, one interval A is unnecessary (A=O).

Also, since the top surface of the annular seal portion 31 and the lowermost end of the inner circumference of the breather pipe 26 are on the same surface, =.

Therefore, the top of the outer circumference of the breather pipe is almost at the narrow bottom end of the guide member.

From these facts, (1) the height from the top of the annular seal portion 31 to the edge of the outer cylindrical tube 24 of the present invention is determined by the inner diameter d of the breather pipe, the wall thickness t of the breather pipe, and the width of the cap guide member 34 and 35. This is the sum of the height C' from the narrow lower edge to the top of the outer cylindrical pipe 24 forming the water inlet 23 at the top. That is, in this case, the height from the top surface of the annular seal portion to the upper edge of the water inlet is (h, +C') (here, =d+t).

In this way, the height from the top surface of the annular seal portion 31 of the radiator of the present invention to the upper end of the outer tube 24 is only (h, +A+B) compared to the height at the same position in the conventional case. The overall height can be reduced.

In addition, considering the total height of the water inlet, since the top end surface of the inlet pipe is configured to be in the same plane as the top of the annular seal, the height dimension between these parts can also be reduced, and the total height of the radiator can be considerably reduced. I can do it.

[Effects of the Invention] In the water inlet portion of the automobile radiator according to the present invention, the annular seal portion on which the packing of the pressure regulating valve disposed in the cap is seated is attached to the inner circumferential wall of the lower end of the outer tube. It is formed concentrically with respect to the central axis and integrally in a plane perpendicular to this central axis, and the surface including the top of the annular seal portion is the same as the lowest end of the opening to the inner wall surface of the outer cylinder pipe of the breather pipe. Because it is in-plane, the overall height can be lower than that of a conventional radiator by the height from the top of the annular seal part to the bottom of the inner circumference of the breather pipe, and the cooling water inside the radiator that overflows when the cap is removed can be reduced. The water is discharged from the breather pipe to the reserve tank, so it does not overflow from the water inlet.In addition, the cap guide formed on the outer peripheral wall of the outer tube has a width parallel to the central axis of the outer tube. The guide member is comprised of at least two guide members each having a small narrow portion and a wide portion larger than the narrow portion and disposed at least the width of the catch claw of the cap. The end of the wide part of one of the parts is placed very close to the breather pipe, so when fitting the cap to the water inlet of an automobile radiator, the catch claw of the cap is placed in the narrow part by the cap guide. It is guided from the wide part to the wide part, and is gradually tightened, and the pressure of the cap is l! 1g! ! The valve packing is securely seated in the annular seal part in a liquid-tight state, and the catch claw finally stops when it comes into contact with the breather pipe.The catch claw uses the breather pipe as a stopper to maintain the stopped position, and the cap closes the water inlet. Keep it in a sealed state. At this time, the breather pipe serves both as a passage for the cooling fluid and as a stopper for the cap.

Unlike conventional radiators, there is no need to separately provide a cap stopper on the cap guide, and a breather pipe is installed on the outer wall between the upper edges of the outer tube that forms the water inlet from the top surface of the annular seal part of the outer tube. and a cap guide, whose height is the sum of the inner diameter d of the breather pipe, the wall thickness t of the breather pipe, and the height C' from the lower edge of the narrow part of the cap guide to the top of the outer tube. The height from the top surface of the annular seal part of the outer cylindrical tube to the upper edge of the water inlet of the water inlet of a conventional radiator.

At least the height from the top of the annular seal to the bottom of the inner periphery of the breather pipe and the height from the top of the outer periphery of the breather pipe to the upper edge of the water inlet, when the catch claw is inserted into the water inlet when the cap is fitted into the water inlet. The height of the outer cylindrical tube can be reduced by the sum of the interval required for passage and the height of the cap stopper.

In addition, by making the top of the opening of the inlet pipe to the upper tank side wall in the same plane as the plane containing the top of the annular seal, it is possible to further increase the distance between the inlet pipe and the upper tank side wall from the overall height of the conventional radiator. The height from the top of the opening to the top of the annular seal can be reduced.

As described above, (1) the automotive radiator of the present invention can lower the overall height without reducing the inner diameter of each vibrator or thinning the wall thickness; It is possible to satisfy the demand for lowering the height of the section.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a radiator for an automobile according to the present invention. Figure 2 is a front view of the water inlet (outer tube), Figure 3 is a top view of Figure 2, Figure 4 is a sectional view of the cap, and Figure 5 is the same as Figure 2 with the cap fitted. A front view, FIG. 6 is a cross-sectional view of the main part of the water inlet part (outer cylinder pipe) of the automotive radiator of the present invention, FIG. 7 is a cross-sectional view of the main part of the conventional water inlet part (outer cylinder pipe), and FIG. The figure is a sectional view of a conventional radiator water inlet, and FIG. 9 is a front view of the conventional water inlet with a cap fitted. 17...Cap stopper, 21...Upper tank, 22...Inlet pipe, 23...Water inlet, 24...Outer cylinder pipe , 25... Cap, 26... Breather pipe, 31... Annular seal part, 33... Outer cylinder seal part, 34.35... ...Cap guide. 36... Narrow part, 37... Wide part, 38... Lower edge, 39... Notch, 40... Catch claw , 42... Cylindrical tube. 44...Pressure regulating valve. 45... Negative pressure valve, 46... Packing, 48... Valve plate. Figure 1 U] Figure 4 of -O Figure 6 Figure 5 Figure 7

Claims (2)

[Claims] (1) An inlet pipe that introduces cooling fluid from the engine, an upper tank in which the inlet pipe has a projecting opening on a side wall and receives the cooling fluid from the inlet pipe, and an upper tank that has an opening on the top wall of the upper tank. a cylindrical outer cylindrical tube with an opening protruding toward the upper tank and whose upper edge serves as a water inlet to the upper tank; a breather pipe which is arranged to communicate with a reserve tank for storing a portion of water; A cap guide formed to protrude outward and a pressure regulating valve and a negative pressure valve disposed on the back side are inserted into the outer cylindrical pipe through the water inlet, and the packing of the pressure regulating valve is inserted into the outer cylindrical pipe. A radiator for an automobile comprising a water inlet portion having a cap that is seated on an annular seal portion formed in an annular seal portion and is latched to the cap guide by a catch pawl to seal the water inlet of the outer cylindrical pipe. An annular seal portion on which the packing of the pressure regulating valve disposed in is seated is integrally attached to the inner circumferential wall of the lower end portion of the outer cylindrical tube concentrically with the central axis in a plane perpendicular to the central axis of the outer cylindrical tube. a cap formed on the outer circumferential wall of the outer cylindrical tube, with a surface including the top of the annular seal portion being flush with the lowest end of the opening of the inner wall surface of the outer cylindrical tube of the breather pipe; The guide includes a narrow portion having a smaller width in a direction parallel to the central axis of the outer cylindrical tube and a wide portion having a larger width, and has a width larger than the catch claw along the circumferential direction of the cap. Consisting of at least two guide members arranged at a distance of
One of the guide members has an end of the wide portion disposed very close to the breather pipe, and has a height from the top surface of the annular seal portion of the outer tube to the upper edge forming the water inlet. is the sum of the inner diameter d of the breather pipe, the wall thickness t of the breather pipe, and the height C' from the lower edge of the width sandwiching part of the cap guide to the top of the outer cylindrical pipe. Features of automotive radiators. (2) The uppermost end of the opening of the inlet pipe to the upper tank side wall is arranged in the same plane as a plane including the top of the annular seal part. Automotive radiator.