JPH0452501Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mount that is interposed between a vibration generator when the vibration generator is installed on a pedestal and elastically supports the vibration generator.

[Conventional technology]

As shown in Fig. 4, when placing a vibration generator C such as a compressor on a pedestal P, a required number of mounts 1 are installed between the two to prevent vibrations from being transmitted from the vibration generator C to the pedestal P. The vibration generator C is supported elastically by the mount 1.

A conventional mount 1 has a structure shown in FIGS. 5 and 6.

That is, an annular bellows part 3 having a pair of slopes 3a and 3b and having a substantially F-shaped cross section is provided on the inner periphery of the annular elastic base 2, and an annular central shaft base 4 is provided on the inner periphery of the bellows part 3. is provided, and a metal sleeve 5 is attached to the central shaft base 4. The elastic base 2, the bellows part 3, and the central shaft base 4 are integrally molded from a predetermined rubber-like elastic body, and the bellows part 3 has a small spring constant in each of the radial and axial directions so as to obtain a large vibration damping force. It is set.

When the mount 1 is used, the elastic base 2 is connected to the pedestal P, and the sleeve 5 is connected to the vibration generator C.

[The problem that the idea aims to solve]

During use, the weight of the vibration generator C acts on the mount 1 from above as a large load, and the bellows portion 3 sinks significantly downward under this load. Since this state continues for a long time, the bellows part 3 becomes sagging due to material fatigue, and the bellows part 3
There is a risk of early deterioration. When the bellows portion 3 sinks, first, its chevron shape is elastically deformed so as to collapse toward the inner circumference over the entire circumference. Then, as time passes, the balance of stress around the entire circumference gradually collapses, and some weak parts along the entire circumference collapse further before other parts, causing sag in these weak parts. The stress imbalance is caused by non-uniform molding.

In view of the above points, the present invention aims to provide a mount in which when a large load is input from above, the bellows part collapses less than before, and therefore the bellows part sinks less than before. The purpose is to improve durability.

[Means to solve the problem]

In order to achieve the above object, the mount of the present invention is provided with an annular bellows portion having a pair of slopes and having a substantially F-shaped cross section on the inner periphery side of an annular elastic base body, and an annular bellows portion on the inner periphery side of the bellows portion. The mount includes a central shaft base, the elastic base, the bellows part, and the central shaft base are integrally molded of a rubber-like elastic body, and a metal sleeve is attached to the central shaft base; A plurality of ribs are arranged radially between the slope on the inner peripheral side and the central shaft base or between the pair of slopes on the concave side of the bellows part, and the ribs are connected to the elastic base, the bellows part, and the central shaft. It is characterized in that the base portion and the rubber-like elastic body are integrally molded.

[Effect]

When viewed as a single rib, it is a single flat plate with a predetermined thickness, and when a load is applied from a direction parallel to the flat plate, it is difficult to buckle, and when a load is input from a direction intersecting the flat plate, it is difficult to buckle. is prone to buckling. In the mount of the present invention, the direction parallel to the flat plate is the axial direction, that is, the vertical direction, and even if a large load is applied from above, the bellows portion is unlikely to collapse toward the inner circumference or sink downward. Therefore, it is possible to provide a mount that is less prone to settling in the bellows portion and has excellent durability.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

The mount shown in FIGS. 1 and 2 has the following features compared to the prior art described above.

That is, a plurality of (four in the figure) ribs 6 are arranged radially between the inner circumferential slope 3a on the convex side (upper side) of the bellows part 3 and the central shaft base 4. The rib 6 is integrally molded from the same rubber-like elastic body as the elastic base 2, the bellows portion 3, and the central shaft base 4.

The mount with the above configuration has ribs 6 that are difficult to buckle when a load is input from the axial direction, that is, from the top and bottom, so that even if a large load is input from above, the bellows portion 3 collapses toward the inner circumference. It is difficult to sink downward, and the bellows part 3
Hard to cause sagging. This difficulty in sinking can be expressed as an increase in the spring constant.
Note that the mount can softly support vibration input from the radial direction. This is because the ribs 6 are likely to buckle in response to vibration input from the radial direction.

As shown in FIG.
Alternatively, the same effect as in the first embodiment can be obtained. This is because when the bellows portion 3 sinks, the bellows portion 3 attempts to narrow the intersecting angle between the pair of slopes 3a and 3b.

[Effect of idea]

The present invention has the following effects. That is, since the ribs are provided that are difficult to buckle when a load is input from the axial direction, that is, from the top and bottom, the bellows portion is difficult to collapse toward the inner circumference or sink downward even when a large load is input from above. Therefore, the bellows portion is less likely to sag, and the durability of the bellows portion can be improved. Furthermore, the mount of the present invention can still softly support vibration input from the radial direction.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a mount according to a first embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line A-O-A in Fig. 1, and Fig. 3 is a plan view of a mount according to a second embodiment of the present invention. 4 is an explanatory view showing how to use the mount, FIG. 5 is a plan view of a conventional mount, and FIG. 6 is a sectional view taken along the line B--B in FIG. 5. DESCRIPTION OF SYMBOLS 1... Mount, 2... Elastic base, 3... Bellows part, 3a, 3b... Slope, 4... Central shaft base,
5... Sleeve, 6... Rib, P... Frame, C...
...Vibration generator.

Claims (1)

[Scope of utility model registration request] A pair of slopes 3a are provided on the inner peripheral side of the annular elastic base 2.
3b, an annular bellows part 3 having a substantially F-shaped cross section is provided, an annular central shaft base 4 is provided on the inner peripheral side of the bellows part 3, and the elastic base 2, the bellows part 3
In the mount 1 in which the center shaft base 4 is integrally molded from a rubber-like elastic body and a metal sleeve 5 is attached to the center shaft base 4, the slope 3a on the inner peripheral side of the convex side of the bellows portion 3 and A plurality of ribs 6 are arranged radially between the center shaft base 4 or between the pair of slopes 3a and 3b on the concave side of the bellows part 3, and the ribs 6 are connected to the elastic base 2, the bellows part 3, and the center. A mount characterized in that the shaft base 4 and the rubber-like elastic body are integrally molded.