JPH08210136A - Fan shroud - Google Patents

Abstract

PURPOSE: To reduce the manufacturing cost of a fan shroud of such a structure that the body of shroud is separate from the cylindrical part. CONSTITUTION: A fan shroud is composed of a fan shroud body 1, cylindrical part 2, and a plurality of spring members 3 to secure the cylindrical part to the body 1. The body 1 has a shroud case 1a enclosing one of the heat radiating surfaces of a condenser and a mounting part 1b for making mounting on the radiating surface. The shroud case 1a is provided with a circular opening 5, and around the opening 5 a plurality of rectangular holes 6 are furnished at a certain spacing. The cylindrical part 2 consists in a simple cylinder, and its bore is greater than the diameter of the opening 5. The two ends 3a, 3b of each spring member 3 are folded into a hook form. The end 3a of spring member 3 is detained with one hole 6, and the other end 3b of the spring member 3 is detained with the open end of the cylindrical part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan shroud, and more particularly to a fan shroud mounted on a heat exchanger such as an automobile radiator.

[0002]

2. Description of the Related Art A fan shroud has a fan shroud body and a cylindrical portion projecting from the periphery of the opening of the fan shroud body. The fan shroud body has a heat radiating surface of a heat exchanger such as a radiator and a condenser and the vicinity of the heat exchanger. It is installed between the fan and the fan located at to enhance the cooling effect of the heat exchanger and promote the heat exchange efficiency.

By the way, it is the actual situation that the method of producing fan shrouds is changed depending on whether the demand for fan shrouds of the same type is high or low. That is, when the demand for the same type is high, the fan shroud body and the cylindrical portion are integrally molded using a mold, whereas when the demand for the same type is low, that is, if a small amount of various types is to be produced, for example. In such a case, the production method using a mold will increase the cost.Therefore, make the fan shroud main body and the cylinder separately, and combine them by spot welding, partial welding, etc. as described later. ing.

[0004]

FIG. 6 shows a conventional fan shroud. FIG. 6 (a) is a plan view thereof and FIG. 6 (b) is its view.
Is a side view.

As shown in FIG. 6, the fan shroud has
The fan shroud body 101 and the cylindrical portion 102 are provided. The fan shroud body 101 is a shroud case 101a that covers one heat radiation surface of a radiator (not shown).
And a mounting portion 101b for mounting on the heat dissipation surface. A mounting hole 104 is provided in the mounting portion 101b. A circular opening 105 is provided in the shroud case 101a of the fan shroud body 101.

On one end face of the cylindrical portion 102, as shown in FIG.
As shown in (a), a fixed claw 107 that is bent at a right angle to the central axis of the cylindrical portion 102 is provided.

To manufacture this fan shroud, the fixed claw 107 shown in FIG. 7 (b) is bent at a right angle, then the whole is bent into a cylindrical shape as shown in FIG. 7 (b), and both ends are spot welded. Then, the cylindrical portion 102 is manufactured, and finally, the cylindrical portion is inserted into the circular opening 105 of the shroud case 101a, and the fixing claws 107 are respectively attached.
Spot weld to.

FIG. 8 shows another conventional fan shroud. FIG. 8 (a) is a plan view thereof and FIG. 8 (b) is a side view thereof. The same parts as those of the fan shroud of FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted.

In the fan shroud of FIG. 6, the cylindrical portion 10
2 has a plurality of fixed claws 107, and the case where all the fixed claws 107 are spot-welded to the shroud case 101a has been described. However, in the fan shroud of FIG. 8, the cylindrical portion 202 does not have the fixed claws, It is a simple cylindrical body, and the cylindrical portion 202 is inserted into the circular opening 105 of the shroud case 101a, and as shown in FIGS. 8A and 8B, a metal 108 is formed between the cylindrical portion 202 and the outer peripheral surface of the shroud case 101a. Melt the shroud case 101
The cylindrical portion 202 is fixed to a.

However, although any of the above-described conventional fan shroud production methods have been adopted to reduce the manufacturing cost in the case of high-mix low-volume production, the welding work is required as described above. Moreover, since the work is complicated, there is a problem that the effect of cost reduction is not sufficient as a result.

The present invention has been made in view of such circumstances, and an object thereof is to reduce the manufacturing cost of a fan shroud of a type in which a fan shroud main body and a cylindrical portion are separated.

[0012]

In order to solve the above-mentioned problems, a fan shroud according to a first aspect of the present invention is attached to a fan shroud body attached to a heat exchanger and a circular opening of the fan shroud body. In a fan shroud having a cylindrical portion surrounding at least a part of a fan arranged in the vicinity of the heat exchanger, the fan shroud body is provided with a plurality of holes at predetermined intervals along the circular opening, The inner diameter of the cylindrical portion is larger than the diameter of the circular opening, one end of each of a plurality of spring members formed at both ends in a hook shape is engaged with the plurality of holes, respectively, and the other end of the plurality of spring members. Parts are respectively engaged with the cylindrical parts.

In the fan shroud of the second aspect of the present invention, the other end of each of the plurality of spring members is engaged with a cylindrical portion side engaging hole provided in the cylindrical portion.

Further, in the fan shroud of the invention as set forth in claim 3, the plurality of holes are located inside the cylindrical portion supported by the fan shroud body by the plurality of spring members.

[0015]

According to the fan shroud of the invention described in claim 1,
A plurality of holes are provided in the fan shroud body along the circular opening at predetermined intervals, the inner diameter of the cylindrical portion is made larger than the diameter of the circular opening, and one end of each of the plurality of spring members is formed in a hook shape at both ends. To engage the plurality of holes with each other, and to engage the other end of each of the plurality of spring members with the cylindrical portion, thereby fixing the cylindrical portion to the fan shroud body. There is no need to weld multiple points on the fan shroud body.

Further, in the fan shroud of the present invention as defined in claim 2, since the other end portions of the plurality of spring members are respectively engaged with the cylindrical portion side engaging holes provided in the cylindrical portion, the springs having the same size are formed. Various cylindrical parts having different heights can be fixed to the fan shroud body by using a member.

Further, in the fan shroud of the invention as set forth in claim 3, a plurality of holes with which the other end of the spring member is engaged are provided inside the cylindrical portion abutting against the abutting surface of the cylindrical portion of the fan shroud main body. Since it is located, the spring member can be housed in the cylindrical portion, and a wide space for attaching parts such as pipes and brackets can be secured on the abutting surface of the cylindrical portion of the fan shroud body.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a fan shroud according to a first embodiment of the present invention, FIG. 2 shows a state in which the fan shroud of FIG. 1 is assembled, and FIG. 1 (a) is a plan view thereof. (B) is a side view.

The fan shroud of this embodiment comprises a fan shroud body 1, a cylindrical portion 2 and a plurality of spring members 3 for fixing the cylindrical portion to the fan shroud body.

The fan shroud body 1 has a shroud case 1a for covering one heat radiation surface of a condenser (heat exchanger) not shown, and a mounting portion 1b for mounting on the heat radiation surface. A mounting hole 4 for passing a screw (not shown) is provided in the mounting portion 1b. A circular opening 5 is provided in the shroud case 1a. Circular opening 5
Four rectangular holes 6 are provided at regular intervals around the.

The cylindrical portion 2 is a simple cylindrical body, and is shown in FIG.
As shown in (b), the inner diameter d is the diameter D of the circular opening 5.
Greater than Further, the axial length (height) of the cylindrical portion 2 is set in advance in accordance with the rotational axial length of the fan 10 (propeller fan), and is half the rotational axial length of the fan 10 when the fan shroud is set. Is set to be exposed from the cylindrical portion 2 (see FIG. 2B).

Both ends 3a and 3b of the spring member 3 are bent in a hook shape, and the spring member 3 is made of spring steel.

Next, a method of assembling the fan shroud of this embodiment will be described.

First, as shown in FIG. 3, one end 3a of the spring member 3 is engaged with all the holes 6 of the shroud case 1a.

Next, the cylindrical portion 2 is set in the area surrounded by the spring member 3. At this time, the open end of the cylindrical portion 2 is engaged with the other end 3b of the spring member 3 (see FIG. 3). Due to the elastic action of the spring member 3, the cylindrical portion 2 is fixed to the cylindrical portion abutting surface 9 of the shroud case 1a.

After assembly, the shroud case 1a is brought into contact with one of the heat radiation surfaces of the capacitor, the mounting hole 4 of the mounting portion 1b is aligned with a screw hole (not shown) on the heat radiation surface side of the capacitor, and a screw (not shown) is screwed into the hole. To do. In this way, the fan shroud is attached to the condenser.

According to the fan shroud of this embodiment,
Compared to a conventional fan shroud that requires the cylindrical portion to be welded to the shroud case at a plurality of points, the cylindrical portion 2 is fixed to the shroud case 1a by the spring member 3, so welding is not required and the fan shroud is assembled. The work is much easier. Therefore, it is possible to reduce the manufacturing cost of the fan shroud at the time of high-mix low-volume production.

FIG. 4 is an enlarged sectional view showing a main part of a fan shroud according to the second embodiment of the present invention.

The same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the second embodiment, the height of the cylindrical portion 12 is almost twice the height of the cylindrical portion 2 of the first embodiment, and the intermediate portion of the cylindrical portion 12 is spaced at regular intervals along the circumferential direction. Is provided with a plurality of rectangular holes (cylindrical portion side engaging holes) 7.
The other end 3b of the spring member 3 is engaged with.

According to the fan shroud of the second embodiment, by providing the hole 7 in the cylindrical portion 12, the same spring member 3 as in the first embodiment can be used to fix the cylindrical portions 12 having different heights. . That is, the size of the fan 10,
According to the fan shroud of the second embodiment, the common part (the spring member 3 of the first embodiment) is used when the cylindrical portions 12 having different heights are used depending on the number of the fans 10 and the twist angle of the fans 10. Various cylindrical parts 12 can be fixed by using.

FIG. 5 is a sectional view of the essential parts of a fan shroud according to the third embodiment of the present invention.

The same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the first and second embodiments described above, both ends of the spring member 3 are bent in opposite directions, whereas in the second embodiment, both ends 13a, 1 of the spring member 13 are bent.
3b are bent in the same direction as each other.

Further, in the above-described first embodiment, as shown in FIG. 3, when the cylindrical portion 12 is set, the hole 6 with which the spring member 3 engages is located outside the cylindrical portion 12, whereas in the third embodiment
In the embodiment, the fan shroud case 11a with which the spring member 13 engages when the cylindrical portion 2 is set as shown in FIG.
The hole 16 is located inside the cylindrical portion 2.

According to the fan shroud of the third embodiment, since the hole 16 and the spring member 13 are housed inside the cylindrical portion 12, the cylindrical portion projection of the shroud case 1a for mounting a pipe, a motor mounting bracket or the like. A wide space for the contact surface 9 can be secured.

In each of the above-mentioned embodiments, the number of holes 6 and 16 and the number of spring members 3 and 13 are four, but four or more may be used. The number of spring members 3 and 13 may be changed according to the size of the fan.

Further, in each of the above-mentioned first and second embodiments, the case where both ends of the spring member 3 are bent in opposite directions is described, but both ends of the spring member 3 are modified as these. It is possible to use those in which 3a and 3b are bent in the same direction as in the third embodiment, and by doing so, the same effect can be obtained.

Further, in the above-mentioned third embodiment, the spring member 13 is used.
The case where both ends 13a and 13b of the spring are bent in the same direction is described, but as a modified example, both ends 13a and 13b of the spring member 13 are opposite to each other as in the first and second embodiments. A bent one may be used, and the same effect can be obtained by doing so.

[0041]

As described above, according to the fan shroud of the invention described in claim 1, since the cylindrical portion is fixed to the fan shroud main body by the spring member, the cylindrical portion is provided at a plurality of positions on the fan shroud main body. Since it is not necessary to weld the fan shroud, the work for assembling the fan shroud is significantly facilitated, so that the manufacturing cost of the fan shroud can be reduced.

According to the fan shroud of the second aspect of the present invention, the other end portions of the plurality of spring members are respectively engaged with the cylindrical portion side engaging holes provided in the cylindrical portion, so that they have the same size. It is also possible to fix various cylindrical parts having different heights to the fan shroud main body by using the spring member, and it is possible to meet the demand for common parts.

Further, according to the fan shroud of the third aspect of the invention, the plurality of holes with which the other end of the spring member is engaged are formed in the cylindrical portion of the fan shroud main body, which is abutted against the abutting surface of the cylindrical portion. Since it is located on the inner side, the spring member can be housed in the cylindrical portion, and a wide space for attaching components such as pipes and brackets can be secured on the abutting surface of the cylindrical portion of the fan shroud body.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a fan shroud according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a state after the fan shroud of FIG. 1 is assembled.

FIG. 3 is a partially enlarged cross-sectional view showing a combined state of a fan shroud main body and a cylindrical portion.

FIG. 4 is an enlarged sectional view showing a main part of a fan shroud according to a second embodiment of the present invention.

FIG. 5 is an enlarged sectional view showing a main part of a fan shroud according to a third embodiment of the present invention.

FIG. 6 is an explanatory view showing a state after the conventional fan shroud is assembled.

FIG. 7 is an explanatory diagram for explaining a cylindrical portion of the fan shroud of FIG.

FIG. 8 is an explanatory diagram showing a state in which another conventional fan shroud has been assembled.

[Explanation of symbols]

 1 Fan shroud main body 2,12 Cylindrical part 3,13 Spring member 3a, 13b One end part 3b, 13b of the spring member The other end part 5 of the spring member 5 Circular opening 6,7,16 hole 10 Fan d Inner diameter of the cylindrical part D Circular opening Diameter of

Claims (3)

[Claims] 1. A fan shroud body attached to a heat exchanger, and a fan shroud body attached to a circular opening,
And in a fan shroud provided with a cylindrical portion that surrounds at least a part of the fan, a plurality of holes are provided at predetermined intervals along the circular opening in the fan shroud body, and the inner diameter of the cylindrical portion is equal to that of the circular opening. One end of each of the plurality of spring members each having a hook shape and having a diameter larger than the diameter is engaged with each of the plurality of holes, and the other end of each of the plurality of spring members is engaged with each of the cylindrical portions. A fan shroud characterized by being made. 2. The other end portions of the plurality of spring members are respectively engaged with a plurality of cylindrical portion side engaging holes provided in the cylindrical portion along the circumferential direction. 1. The fan shroud described in 1. 3. The fan shroud according to claim 1, wherein the plurality of holes are located inside the cylindrical portion supported by the fan shroud body by the plurality of spring members.