JPH018414Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in elastic support devices for radiators in automobiles and the like.

Conventionally, a radiator support device in an automobile supports the bottom side of the radiator 1 on a mounting bracket 3 on the body 2 side via a rubber member 4, as shown in FIG. 5, it is supported on the body 2.
However, since the radiator 1 is supported elastically in this manner, the vertical vibration (bouncing) and the roll direction vibration (vibration in the arrow direction in the figure) of the radiator 1 tend to resonate. Also, if the vertical height of radiator 1 is different (for example, 1.2,
1.4), it is necessary to change the mounting bracket 3 of body 2 each time.
As the number of types increased, it was disadvantageous for assembly line operations.

This invention was made with attention to the above circumstances,
The purpose is to provide an elastic support device for a radiator that can prevent resonance between vertical vibration and roll vibration of the radiator.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

FIG. 2 shows a radiator 11 for an automobile. This radiator 11 consists of a top tank 12, a lower tank 13, and a radiator core 14,
L-shaped radiator mounting brackets 15 and 16, which serve as radiator side brackets, are provided on both left and right sides, respectively, and are welded and fixed thereto. And these radiator mounting brackets 15, 16
As shown in FIG. 3, it is elastically attached to a lamp support bracket 17 as a bracket on the vehicle body side using an elastic bush which will be described later. Note that the radiator 11 is provided with a motor 19 that drives a fan 18 .

Next, the support structure for attaching the radiator 11 to the lamp support bracket 17 will be described in detail. That is, each of the radiator mounting brackets 15 and 16 has two holes 2 as mounting holes located equally apart by a distance m above and below a horizontal plane passing through the center of gravity G of the radiator 11.
1 and 22 are provided. These holes 21,2
2 is formed into a cylindrical shape by bending the hole edges 23 and 24, and each central axis intersects on a horizontal plane passing through the center of gravity G. In other words, each hole 21, 22
is symmetrical with respect to a horizontal plane passing through the center of gravity G, and is provided so as to be inclined at an angle α with respect to the horizontal plane. Furthermore, as shown in FIG. 3, each hole 2
1, 22, the hole edge 2 located on the horizontal plane side
The portions 3 and 24 protrude toward the front side of the radiator 11 (the lamp support bracket 17 side), and the portion on the opposite side thereof protrudes toward the radiator 11 side.

Bolt mounting portions 27 and 2 are located in the central axis direction of the holes 21 and 22 and have mounting surfaces 25 and 26 perpendicular to the central axes of the holes 21 and 22, respectively, on the lamp support bracket 17.
8 is curved, and bolt through holes 29, 29 as attachment holes are formed in the center of each of the bolt attachment portions 27, 28. Then, as shown in FIG. 4, the bolt through hole 29,
29 has a bolt 31 as a fastening member from the outside,
32 shafts are inserted. This bolt 31, 32
The shaft portion thereof is positioned so as to pass through each of the holes 21 and 22. A cylindrical collar 33 is fitted into each shaft portion, and elastic bushings 34 and 35 for vibration isolation, which will be described later, are fitted onto the outer periphery of the collar 33 and attached via a washer 36 with a nut 37. The configuration is such that it is maintained.

The vibration-proofing elastic bushings 34 and 35 include a first bushing portion 38 formed in a ring shape that corresponds to the mounting seats 25 and 26, and a second bushing portion 39 formed in a ring shape that corresponds to the washer 36. , and a cylindrical third bushing part 41 located between the first and second bushing parts 38 and 39 and interposed between the collar 33 and the inner peripheral surfaces of the holes 21 and 22. ing. Furthermore, the plane portions of the first and second bushing portions 38, 39 each have a hole edge 23,
The tip of the bolt 24 comes into contact with the bolt 31 and receives a compressive force in the axial direction of the bolt 31 (which becomes the main axis of the spring action described later). In addition, the third bushing part 41
is adapted to receive a compressive force in a direction perpendicular to the axial direction of the bolt 31 (which becomes the main axis of the spring action described later). In other words, each of the bushes 34 and 35 has a main axis of spring action in its axial direction and a main axis of spring action in a direction perpendicular to the axial direction of the bolt 31. When this is modeled, it becomes as shown in Fig. 5.

In Fig. 5, H is a supporting rigid body (radiator);
G is the center of gravity of the supporting rigid body, F is the resultant force of the bushings 38, 39, and 41 acting on the support point I, and β is the angle formed by the resultant force F and the GY axis.

Therefore, in the YGZ plane, the main axes of spring action of the first and second bushings 38 and 39 are tilted by α with respect to the Z axis to reduce the resonance between the vertical vibration of the radiator and the roll direction vibration. To prevent this, it is sufficient that no rotational moment is generated around the axis passing through the center of gravity G and perpendicular to the plane of the paper (hereinafter referred to as the GX axis) due to displacement in the Y direction. All that is required is for the restoring force generated by the bushings 38 and 39 to pass through the GX axis. Now, if K ₁ and K ₂ are the spring constants in the direction of the main axis of spring action of each bushing, then the support point I
, the spring force due to the displacement y of the center of gravity is K ₁ Spring force = −K ₁ y cosα K ₂ 〃 = −K ₂ y sinα Also, the Y-direction component of the spring force is due to K ₁ = −K ₁ y cos ² α K ₂ 〃 = −K ₂ y sin ² α Also, the Z-direction component of the spring force is due to K ₁ = K ₁ y sinαcosα K ₂ 〃 = −K ₂ y sinαcosα Adding these vector components, the Y direction Vector sum of spring forces in the Z direction (resultant force of the spring forces in the Y-axis direction) = - (K ₁ cos ² α + K ₂ sin ² α) y (for one support point) Vector sum of the spring forces in the Z direction (resultant force of the spring forces in the Z-axis direction) Resultant force of spring force) = y (K ₁ − K ₂ ) sinαcosα (for one support point) If the angle between this resultant force and the GY axis is β, tan β = l/m When the following condition is satisfied, the action of resultant force F The direction extension line will intersect with the GX axis. In other words, tanβ = Resultant force of spring force in Z-axis direction / Resultant force of spring force in Y-axis direction = - (K ₁ - K ₂ ) sin α cos α / K ₁ cos ² α + K ₁ sin ² α =
l/m, so K ₁ , K ₂ ,
If α is determined, no rotational moment will occur around the GX axis.

The above configuration satisfies this requirement. Therefore, resonance between the vertical vibration of the radiator 11 and the roll vibration can be prevented.

FIG. 6 shows another embodiment of the present invention. In the above embodiment, even the bolts 31 and 32 were tilted, but in this embodiment, the bolt 3
Push button 34,3 without tilting 1,32.
A similar effect was achieved by attaching only 5 at an angle.

In this case, the holes 21 and 22 provided in the radiator mounting bracket 15 are formed so as to be offset at the top and bottom, and the ring 51 is welded to the holes 21 and 22. An elastic bush 52 having an H-shaped cross section and an inclined characteristic is fitted into the ring 51. 53 and 54 are spacers provided on both sides of the elastic bushing 52;
This allows the bolts 31 to be installed horizontally. Therefore, in this embodiment, there is no need to mold the lamp support bracket 17 into a special shape, and the workability of bolt attachment is improved.

As explained above, according to the present invention, resonance between the vertical vibration of the radiator and the roll vibration can be avoided and the vibration can be prevented. Furthermore, the vehicle body side bracket can also be standardized, and there is no need to change the mounting bracket depending on the height of the radiator. Therefore,
Good workability on the assembly line.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional elastic support device, and FIG. 2 is a front view of a radiator showing an embodiment of the present invention.
FIG. 3 is a side sectional view of the elastic support device of the radiator, FIG. 4 is an enlarged side sectional view of the main parts, FIG. 5 is a model diagram of the radiator in its supported state, and FIG. FIG. 7 is an enlarged side sectional view of a main part of another embodiment. 11... Radiator, 15, 15... Radiator mounting bracket, 21... Hole, 22... Hole,
34...Elastic bushing, 35...Elastic bushing,
38...First bushing part, 39...Second bushing part, 49...Third bushing part, G...Center of gravity.

Claims (1)

[Scope of utility model registration request] a vehicle body side bracket formed on the vehicle body; a radiator side bracket formed on the peripheral edge of the radiator to face the vehicle body side bracket; and a radiator side bracket disposed between the vehicle body side bracket and the radiator side bracket. An elastic bushing that is deformed by the vehicle body side bracket and the radiator side bracket to generate a restoring force during vibration, a mounting hole that passes through the vehicle body side bracket, the radiator side bracket, and the elastic bushing, and a fastener provided in the mounting hole. At least one pair of elastic support members constituted by members are provided, and the at least one pair of elastic support members is configured such that the resultant force of the restoring force generated in the elastic bushing acts through the center of gravity of the radiator in order to prevent the generation of a rotational moment about the center of gravity of the radiator. 1. An elastic support device for a radiator, comprising: an elastic support member; and a spring constant of the elastic bush.