JPH0226732Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on the idea that the radiator of the vehicle is placed at the upper end.
This invention relates to a radiator support that elastically supports a radiator in cooperation with a lower support at the lower end.

The radiator is supported from the vehicle body via an upper support and a lower support having rubber members in order to accommodate variations in assembly dimensions and thermal expansion. Therefore, a vibration system is constituted by the mass of the radiator containing engine cooling water and the springs of the rubber members of the upper support and lower support. Although the natural frequency of this vibration system is usually higher than the idle frequency, sufficient care must be taken to avoid aggravating idle vibration or inducing or worsening muffled noise.

By the way, the conventional radiator top support has a body side bracket 1 as shown in Figure 1.
and the radiator side bracket 2, the left and right rubber columns 3 and 4 are tilted downward so as to form an inverted V shape after the radiator is assembled. It has been proposed that the rubber members 6 are joined together by a rubber member 6 having a groove 5. (For example, Jitsugan No. 58-60810). With the radiator support having such a structure, variations in the assembly dimensions of the radiator and thermal expansion of the radiator can be absorbed by elastic deformation of the rubber columns 3 and 4, and therefore by changes in the hollow dimensions. .

This Atsupa support having the shape shown in Figure 1,
In addition to the above-mentioned advantage of absorbing dimensional variations, in order to provide good vibration properties, we conducted tests to examine the vibration characteristics, especially changes in the spring constant. Second
The results are shown in the figure. In Fig. 2, the horizontal axis shows the initial compression amount after the radiator is assembled, that is, the change in the hollow dimension D in Fig. 1, and the vertical axis shows the dynamic spring constant of the Atsupa support. Curve A shows the characteristic of the change in the dynamic spring constant with respect to the change in the hollow dimension D of the upper support shown in FIG.

As is clear from Figure 2, after the radiator is assembled, the Atsupa support, which has an inverted V-shaped rubber column, has a dynamic spring constant with respect to changes in the cutout dimensions, that is, variations in the assembly dimensions and changes in the amount of thermal expansion. changes significantly. W is the range of change in the dimensions of the hollow 5 due to assembly variations in the radiator and thermal expansion of the radiator, but within this range W, in the range where the hollow dimensions are large, the force acting on the left and right rubber columns 3 and 4 is a compressive force. Therefore, the rubber columns 3 and 4 exhibit a high spring constant, and since the force acting on the left and right rubber columns is a tensile force in the range of small die sizes, the rubber column 34 exhibits a low spring constant. The spring constant changes greatly as the dimensions of the bore 5 change. On the other hand, there is naturally a range of dynamic spring constants that effectively contributes to preventing idle vibration and muffled noise, but if this is shown by H, then within curve A, from this effective range H The protruding portion _A1 is an area that may worsen idle vibration and muffled noise. Therefore, there is no problem if the radiator is assembled with high precision and the bore dimensions are within the bore range W, which corresponds to the effective spring constant range H, but if it is in a range of W other than W ₁ , that is, within the curve A. Idle vibration when in part _A1 ,
There was a problem that the muffled sound could get worse.

The present invention solves the problem described above due to the fact that the dynamic spring constant of the Atsupa Support changes too much with changes in the dimensions of the cutout. It is an object of the present invention to provide a radiator support that reduces the change in the width of the radiator and increases the width of the permissible change in the hollow dimension, which effectively contributes to idle vibration and muffled noise.

The radiator top support of the present invention that achieves this purpose has rubber posts on the left and right sides of the body side bracket and the radiator side bracket, and a support that extends between the left and right rubber posts in the left and right direction. The radiator is connected by a rubber member having a hollowed out space that is continuous with the radiator, and the rubber pillar is set to be horizontal in the free state before the radiator is assembled.

In the upper support for a radiator having such a structure, a tensile force always acts on the rubber column within the range of assembly variations of the radiator, and the dynamic spring constant does not change significantly. Therefore, the width of the bore dimension that effectively contributes to idle vibration and muffled noise becomes larger, and even if there is variation in the vertical direction when assembling the radiator, the dynamic spring constant of the vibration system remains effective in suppressing vibration. The dynamic spring constant is within the range, and no idling vibration or muffled noise will occur.

Hereinafter, preferred embodiments of the radiator top support of the present invention will be described with reference to the drawings.

Figures 3 and 4 show the Atsupa support according to the first embodiment of the present invention, of which Figure 3 shows the free state, and Figure 4 shows the state after the radiator has been assembled and warmed up. It shows. In the figure, 1
Reference numeral 1 indicates a body-side bracket fixed to the vehicle body, and 12 indicates a radiator-side bracket that supports the radiator in contact with the upper tank of the radiator. Both brackets 11 and 12 are connected via a rubber member 13. The rubber member 13 has rubber columns 15 and 16 located on the left and right sides of the axis 14 of the radiator side bracket 12, and a hollow 17 consisting of an arc-shaped space is provided between the rubber columns 15 and 16. have. Above and below the bore 17 are rubber parts 18 and 19 that extend along the body side bracket 11 and the radiator side bracket 12 and are irremovably fixed to the respective brackets 11 and 12.

The left and right rubber pillars 15 and 16 are approximately horizontal in the free state before the radiator 20 is assembled.
That is, the angle of the radiator side bracket 12 is set so that it is perpendicular to the axis 14 of the radiator side bracket 12, and forms a V-shape around the axis 14 when the radiator 20 is warmed up after being assembled. There is. radiator 20
The upward inclination angle α of the rubber columns 15 and 16 after assembly is the hollow dimension D after the radiator 20 is assembled =
a, the horizontal projected length of the rubber columns 15 and 16 is c, and the hollow dimension in the free state D=b, then α=tan ⁻¹ {(ba−a)/c}. Note that in the above description, "substantially horizontal" refers to a state that includes the horizontal and is within a range of approximately ±5° C. or less from the horizontal.

Next, the operation of the upper support of the first embodiment having the above configuration will be explained.

First, in the free state before the radiator 20 is assembled, the upper support is in the state shown in FIG. 3. In this state, the rubber columns 15 and 16 are in a horizontal state.

Next, the radiator 20 is assembled. At this time, the radiator side bracket 12 moves upward, and the upper support becomes the state shown in FIG. 4. At this time, the bore size D is the maximum a, and when D=a, the rubber column 1
5 and 16 form a V shape.

The relationship between the hollow dimension D and the dynamic spring constant of the present invention is shown by curve B in FIG. 2. here,
When trying to change from the state shown in Figure 3 to the state shown in Figure 4, a tensile force is applied to the rubber columns 15 and 16, and since this tensile force is an angular change from the horizontal, the increase in the tensile force is small and there is no shearing or bending. It also involves deformation, so
It was confirmed through testing that the change in the dynamic spring constant with respect to the change in the bore dimension D is small. That is, in FIG. 2, curve B is a curve lying laterally than curve A. Therefore, the permissible poor range W ₁ due to assembly variations corresponding to the effective spring constant range H that is effective for preventing deterioration of idle vibration and muffled noise is expanded to the best assembly variation range W, and the entire assembly variation poor range is Covered by effective spring constant range H. That is, when the radiator 20 is assembled, even if the cavity dimension D varies over the range from a to the minimum cavity dimension d due to assembly variations (however, d-a=W), this The dynamic spring constant is within the effective spring constant range H for the dimensions of the range, and deterioration of idle vibration and muffled sound are prevented.

FIG. 5 shows a second embodiment of the upper support of the invention, shown in its free state. In this embodiment, two rubber pillars 15 and 16 are provided on each side, and they are in a nearly horizontal state in a free state, and both rubber pillars 15 and 16 assume a V-shape when warmed up after the radiator is assembled. . Other configurations and operations are similar to those in the first embodiment, so similar parts are given the same reference numerals as in the first embodiment.

FIG. 6 shows a third embodiment of the upper support of the present invention, shown in its free state. In this embodiment, one rubber pillar 15, 16 is provided on either the left or right side, and two rubber pillars are provided on the other side, and are in a nearly horizontal state in a free state. Both form a V shape. Other configurations and operations are similar to those in the first embodiment, so similar parts are given the same reference numerals as in the first embodiment.

As explained above, the atsupa support of the radiator of the present invention has left and right rubber posts that are horizontal before the radiator is assembled and become V-shaped when the radiator is warmed up after the radiator is assembled. It is possible to suppress changes in the dynamic spring constant due to variations in the upper and lower assemblies, and it is possible to prevent deterioration of idle vibration and muffled noise due to variations in the assemblies.

[Brief explanation of drawings]

Fig. 1 is a front view of a conventional Atsupa support of a radiator, Fig. 2 is a hollow dimension-dynamic spring constant characteristic diagram of the present invention and a conventional Atsupa support, and Fig. 3 is related to the first embodiment of the present invention. FIG. 4 is a front view of the radiator's Atsupa support in the free state, FIG. 4 is a front view of the radiator's Atsupa support of FIG. 3 after the radiator is assembled, and FIG.
FIG. 6 is a front view of the upper support of the radiator according to the embodiment in a free state. FIG. 6 is a front view of the upper support of the radiator according to the third embodiment of the present invention in the free state. 11...Body side bracket, 12...Radiator side bracket, 13...Rubber member, 15,1
6...Rubber column, 17...Crosshole, 20...Radiator, α...Inclination angle of the rubber column from the horizontal after the radiator is assembled, D...Crosshole dimension.

Claims (1)

[Scope of utility model registration request] The body-side bracket and the radiator-side bracket are connected by a rubber member that has rubber posts on the left and right sides and a hollow space between the left and right rubber posts, and absorbs variations in radiator assembly due to changes in the hollow dimensions. In the atsupa support of the radiator that elastically supports the radiator, the groove is continuous in the left and right direction between the left and right rubber columns, and the rubber columns are set to be approximately horizontal in a free state. Atsupa support for radiators characterized by: