JPH0645622Y2 - Radiator Juan Loud - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a radiator fan shroud for an automobile engine.

[Conventional technology]

In an automobile engine, a radiator fan is driven by the engine via a V-belt between the radiator and the engine in order to strongly cool the radiator and the engine by forced convection.

In this type of engine, in order to enhance the air cooling effect by the radiator fan, as shown in the perspective view of FIG. 5 (A), the outer periphery of the radiator fan 01 has a small gap due to the fan shroud 03 fixed to the engine 02. Be surrounded by
It is said that the smaller the radial clearance between the fan shroud and the radiator fan, the better so that the air flowing through the radiator does not leak and is used for air cooling of the engine.

By the way, since the radiator fan is driven by the engine via the V-belt, the fan shroud has various structures in order to move the V-belt in and out through this small gap.

That is, the fan shroud shown in FIG.
A part of 03 can be bulged outward, and the belt 05 can be moved in and out through this bulged portion 04. Further, as shown in the perspective view of FIG. 6 (A), a rectangular opening 06 is provided in a part of the fan shroud, and the opening 06 can be detachably attached to a cover plate 07.
In some cases, the V-belt 05 is removed through the opening 06 by removing the cover plate 07, as shown in FIG.

[Problems to be solved by the device]

However, in the structures shown in FIGS. 5 and 6, since both fan shrouds have a simple cylindrical shape, they are poor in rigidity and are easily deformed. If deformed, the radiator fan hits the fan shroud and is damaged. The clearance between the fan shroud and the radiator fan in the bulging portion in the bulging portion in the radial direction of the fan shroud becomes large locally in the bulging portion. Vibration occurs in the fan shroud and the rigidity of the fan shroud is small, so it is difficult to maintain a small radial clearance between the fan shroud and the radiator fan, which facilitates local contact, and the structure of FIG. When the plate is removed, the rigidity of the fan shroud drops significantly. , Easily deformed or hit the other thing, because when deformed radiator fan contacts, radiator fan, with the fan shroud be damaged.

The present invention has been proposed in view of such circumstances, and enhances strength and rigidity to prevent deformation, wind loss, noise, vibration, etc., and facilitates V-belt insertion / removal work to improve engine performance. Intended to provide a raised radiator fan shroud.

[Means for Solving the Problems]

Therefore, in the present invention, the rear end is fixed to the front surface of the engine and the front end is fitted to the radiator shroud through the annular seal rubber, and the radiator shroud surrounds the radiator fan with a small gap, and the central portion bulges outward. It consists of a roll-formed sheet metal structure with a hat-shaped cross section and has a notch of appropriate length near the upper end, and the inner periphery other than the above notch is adhered with a flat strip thin plate, and the outer periphery of the opposite end of the notch An annular fan shroud main body whose parts are strongly connected by an arcuate bridge plate, and a hat-shaped cross section having the same shape as the fan shroud main body and a thin plate attached to the inner surface and detachably fixed to the bridge plate, The inner surface is an insert member that cooperates with the inner circumference of the fan shroud body to form the same circumferential surface.

[Action]

According to such a structure, the fan shroud has a very large three-dimensional strength despite its lightweight sheet metal structure due to the cooperative action of the hat-shaped cross section, the thin plate adhered to the inner surface thereof, and the bridge plate. Since it has rigidity, it will not be deformed even when hit by another object, and its roundness can be maintained for a long period of time. This holds regardless of whether the insertion member is attached or detached.

The V-belt can be easily put in and taken out through the large cutout portion of the fan shroud after the insertion member is removed.

Since the radial clearance between the fan shroud and the radiator fan can be a uniform small gap of about 5 mm, there is almost no eddy current loss, noise, vibration, etc., and cooling of the radiator and engine is highly efficient. Done in.

〔Example〕

1 is a front view, FIG. 2 is a partial rear view of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. It is explanatory drawing which shows the point in and out of a belt in FIG.

In the above figure, 1 is a radiator fan, which is driven by the engine via a V pulley and a V belt (not shown). Reference numeral 2 is a fan shroud having a hat-shaped cross-section that is roll-formed and surrounding the radiator fan 1 up to a radial clearance of about 5 mm. The rear end of the fan shroud 2 is fixed to the engine and the front end is an annular radiator (not shown). Is connected to the radiator shroud via. Here, a strip-shaped thin plate is attached to the inner surface of the fan shroud 2.

Reference numeral 3 denotes a cutout portion cut on the upper end of the fan shroud 2 over a length in the circumferential direction substantially equal to the blade width of the radiator fan. The opposite end outer peripheral portions of the cutout portion 3 are firmly formed by an arc-shaped bridge plate 4. It is welded.

Reference numeral 6 denotes an insert member attached to the cutout portion 3. The insert member is an arc member 7 having the same hat-shaped cross-sectional shape as the fan shroud 2, and is provided so as to project outward in the radial direction near both ends of the outer circumference of the arc member 7. A pair of stud nuts 8 and an arc member 7
And the flat strip thin plate 9 attached along the lower surface of the. Reference numeral 10 denotes a bolt which penetrates the through hole of the bridge plate 4 and is screwed into the nut 8 to fix the insertion member 6 to the bridge plate 4.

In such a structure, when the V-belt is put in or taken out,
As shown in FIG. 4, after the insertion member 6 is removed, the V-belt 11 is put in and out by using the notch 3 of the fan shroud 2 to be fitted into and removed from the V-pulley, and then as shown in FIG. To
The insertion member 6 is restored.

[Effect of device]

 With such a structure, the following effects can be obtained.

(1) The fan shroud is a roll-molded product having a hat-shaped cross section, and a thin plate is attached to the inner surface of the fan shroud, and the notch is firmly welded through the bridge plate. Regardless, it has three-dimensionally large strength and rigidity, so that it can maintain its roundness without being deformed even when another object hits it.

(2) By removing the insertion member, the V-belt can be easily and quickly taken in and out through the large cutout portion of the fan shroud.

(3) Since the fan shroud is highly rigid and roundness is ensured, according to the structure of the present invention, the radial clearance with the radiator fan can be a uniform small gap of about 5 mm, and It is possible to improve engine performance by reducing loss, noise and vibration.

By the way, the conventional fan shroud has poor rigidity and is easily deformed. Therefore, the radial clearance between the fan shroud and the radiator fan needs to be about 20 mm, which is not a few failures.

In short, according to the present invention, in the radiator shroud in which the rear end is fixed to the front surface of the engine and the front end is fitted to the radiator shroud through the annular seal rubber to surround the radiator fan with a small gap, the central part bulges outward. A roll-formed sheet metal structure having a hat-shaped cross section, and a notched portion of an appropriate length is provided near the upper end, and the inner periphery other than the notched portion is adhered with a flat strip thin plate, and the opposite end of the notched portion An annular fan shroud body whose outer peripheral portion is firmly connected by an arcuate bridge plate, and a hat-shaped cross section having the same shape as the fan shroud body, and a thin plate attached to the inner surface and detachably fixed to the bridge plate. ,
Since the inner surface of the fan shroud cooperates with the inner circumference of the fan shroud body to form the same circumferential surface, the strength and rigidity of the fan shroud body are increased to prevent deformation, windage loss, noise, vibration, etc. The present invention is extremely useful in industry because it provides a radiator fan shroud that facilitates the work of putting in and out the belt and enhances the performance of the engine.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a partial rear view of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is a belt in FIG. It is explanatory drawing which shows the point in and out. FIG. 5 and FIG. 6 are a perspective view showing a known radiator fan shroud and an explanatory view showing a V-belt loading / unloading procedure, respectively. 1 ... Radiator fan, 2 ... Fan shroud, 3 ...
Notch, 4 ... Bridge plate, 6 ... Insert member, 7 ... Arc member, 8 ... Stud nut, 9 ... Thin plate, 10 ... Bolt, 11 ...
V belt.

Claims (1)

[Scope of utility model registration request] 1. A radiator shroud in which a rear end is fixed to a front surface of an engine and a front end is fitted to a radiator shroud via an annular seal rubber so as to surround a radiator fan with a small gap, and a central portion bulges outward. A roll-formed sheet metal structure having a die cross section, and an appropriate length notch is provided near the upper end, and the inner periphery other than the notch is adhered with a flat strip thin plate, and the opposite end outer periphery of the notch Has an annular fan shroud body that is rigidly connected by an arc bridge plate, and has a hat-shaped cross section of the same shape as the fan shroud body, and a thin plate is attached to the inner surface and is detachably fixed to the bridge plate Is a radiator fan shroud, wherein the radiator shroud comprises an insert member that cooperates with the inner circumference of the fan shroud body to form the same circumferential surface.