JPS6216512Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stacked leaf spring device having a plurality of FRP spring plates.

Multiple FRP spring plates overlapped in the thickness direction,
These stacked leaf spring devices having spacers interposed between the spring plates are on the verge of being put to practical use in suspension systems for automobiles, etc., but if the spring action is performed almost continuously, the mutual sliding contact portions, Particularly in the tightening part near the center and the contact part between the child spring plate and the contact plate, the temperature rise due to frictional heat may reach about 50 to 100°C. However, FRP generally has poor heat resistance, and its static and dynamic strength tends to decrease as the temperature rises.For example, the bending strength at 100℃ decreases to less than 50% of that at 20℃. be.

The present invention was developed under the above circumstances, and its purpose is to provide a stacked leaf spring device that can prevent the temperature rise of FRP spring plates due to frictional heat during spring action, and therefore the decrease in strength thereof. It is about providing.

Hereinafter, the present invention will be explained with reference to the illustrated embodiments. In Figure 1, multiple (the figure shows three cases)
The overall structure consisting of FRP spring plates 1, 2, 3, clamping plates 4, 5, spacers 6 to 9, bolts 10, nuts 11, etc. may be substantially the same as in the conventional device. In addition, as illustrated in FIG. 2, the spring plate 1
and 2, spacers 6, 7 interposed between 2 and 3, etc.
may have substantially the same length as the spring plates 2, 3, etc., for example.

The spacers 6 to 9 are formed, for example, from a synthetic resin material into a rectangular shape of a desired size, and have notches 12 as examples of ventilation spaces formed on both sides in the width direction, as illustrated in FIG. It is equipped with... Note that 13 is a bolt hole. Notch 12
As shown in the figure, it penetrates in the thickness direction and is open on one side in the width direction. If necessary, in place of all or part of the cutouts 12, ventilation spaces made of through holes 14, 15, etc. as illustrated in FIG. 4 may be provided. Further, all or part of these through holes 14 and 15 may be impermeable holes. Furthermore, the cutout portion 12
..., the shape, number, position, etc. of the transparent holes (or non-permeable holes) 14..., 15, etc. can be set arbitrarily. However, in any of these cases, the notch 1
2..., through holes (or impermeable holes) 14..., 15..., etc.
It must have an open end facing the plate surfaces of the FRP spring plates 1, 2, and 3, be able to communicate with the outside air, and be kept empty inside.

According to the present invention configured as described above, the spacer is provided with a ventilation space that is made of a transparent hole, a non-permeable hole, a notch, etc., and whose open end faces the plate surface of the FRP spring plate, and the inside thereof is empty. Since the spacer and the spring plate have a small sliding contact area, it is possible to prevent the temperature of the spring plate from increasing due to friction. Also,
By forming the above-mentioned through holes, impermeable holes, notches, etc. so as to be able to communicate with the outside air, it becomes possible to actively cool the spring plate and prevent a rise in temperature. Therefore, it is possible to effectively prevent a decrease in strength of the FRP spring plate due to a rise in temperature.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a side view showing a modification of the same example, and FIGS. 3 and 4 are partial top views illustrating different spacers. 1-3...FRP spring plate, 6-9...Spacer, 12...Notch, 14, 15...Through hole.

Claims (1)

[Scope of utility model registration request] Multiple FRP spring plates overlapped in the thickness direction,
and a spacer interposed between the spring plates, and the spacer has a through hole, an impermeable hole, a notch, etc. whose opening end faces the plate surface of the spring plate, and the spacer has an empty interior. An FRP stacked leaf spring device characterized by having a ventilation space.