JPS6034342B2 - Structure of elastic body for bracket mounting of small rotating machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small rotating machine, and particularly to the structure of an annular elastic body used for attaching a bracket to the outer periphery of a housing thereof.

As shown in FIGS. 1 to 3, a conventional 4-type rotating machine has a yoke 3 consisting of a thin cylindrical housing and an end bracket 2 on the bottom, and a bracket 4 with an annular flange on the outer periphery of the yoke 3. It is fixed by welding.

As described above, in a small rotating machine, the position of the bracket 4 cannot be adjusted after it is attached, which is inconvenient. Further, there was a problem in that the vibrations of the rotating machine were directly transmitted to the mounting member via the bracket 4.

Therefore, as shown in FIGS. 4 to 8, we proposed attaching a bracket 6 to the outer periphery of the housing via an annular elastic body 5 by press fitting.

With this configuration, the position of the bracket 6 can be adjusted even after installation by applying a force greater than the force used during press-fitting, and the vibrations of the rotating machine are absorbed by the elastic body 5, and high-frequency vibrations are absorbed by the bracket. It can be done without being communicated to 6. However, the outer periphery of the elastic body 5 shown in FIG. The corner portion 5A hits the corner of the housing and is rolled inward.

As a result, the bracket was not attached perpendicularly to the rotating shaft of the rotating machine, and when the rotating machine was fixed to other equipment by the bracket, the rotating shaft could not be mounted at a predetermined position on that equipment. In addition, the flange portion 7 of the bracket 6
An inner bent portion is provided at the end of the elastic body 5 to prevent the elastic body from coming off the flange portion when the elastic body 5 is press-fitted.
There is a slight gap between this bent portion inner circumferential machine and the housing. This gap is absolutely necessary to prevent the bent portion from coming into contact with the housing when the elastic body is press-fitted onto the outer periphery of the housing. However, when the elastic body was press-fitted into the outer periphery of the housing, the elastic body was deformed and its corner 5A protruded from this gap, creating a shape as shown in Fig. 7, which had the drawback of significantly deteriorating the external appearance of a small rotating machine. . A housing 8 and an end bracket 9 as shown in FIG. 8 are manufactured separately, and the yoke 1 is assembled.
0, the shoulder portion 11 of the yoke 10 is square. For this reason, when the elastic body 5 was press-fitted, the elastic body was torn at the shoulder portion 11, and the elastic body deteriorated from the cracked portion, causing an accident in which the elastic body was torn and the rotating machine came off the bracket. The aim of the invention is to eliminate the aforementioned drawbacks and
By providing a relief part around the inner corner of the annular elastic body, the elastic body can be prevented from being damaged or entangled due to press-fitting into the housing.
To provide an elastic body for mounting a bracket of a small rotating machine without protruding after press-fitting.

A feature of the present invention is that relief portions are provided around the entire circumference of both inner corner portions of the annular elastic body.

Hereinafter, an embodiment of the present invention will be described based on FIG. 9.

The ring-shaped elastic body 12 is provided with rounded relief parts 13 at both ends of its inner and outer parts.

Each dimension of the elastic body 12 according to this embodiment has an inner diameter d of 75.
60±0.3, the wall thickness t is 3±0.15 legs, the width end is 12 ribs, the R of the relief part 13 is 1.5R, and the hardness is Shore 50 degrees. In addition, the main dimensions of the placket 6 are the inner dimension D of the flange portion 7 where the self-elastic body 12 is press-fitted, which is 80.6.
Mechanism 8.1, inner dimension D of the inner bent part of the flange part 7
2 is 77◇182, and the plate thickness T is on the 1.2 side. Furthermore, the outer diameter of the yoke 3 is 75.60, the interference of the elastic body 12 is 0.5 willow on one side, and the inner sparrow part of the inner bent part of the flange part 7 and the yoke 3 are The gap is 0.7 ribs on one side. At this time, the pressing force of the elastic body 12 into the housing was approximately 400 kg. In a small rotating machine using such an elastic body 12, the elastic body 1
2 was press-fitted into the flange portion 7 of the bracket 6, and when the bracket 6 including the elastic body 12 was further inserted into the yoke 3, the elastic body 12 was not damaged or rolled up.

Even after rough press-fitting, the elastic body 12 did not protrude from the gap between the bent portion of the flange 7 and the yoke 3. In addition, when carrying out the implementation, the relief part of the elastic body 12! 3 is the first
The C-chamfer 14 as shown in FIG.

However, the bent portion 15 formed on the flange portion 7 of the bracket 6 is usually R-shaped, and it is better to provide a relief portion 13 on the outer diameter side end surface of the elastic body 12 that supports the bent portion 15. Protrusion after press-fitting can be reduced compared to when it is provided only on the folding side end face. Furthermore, in order to prevent the elastic body 12 from getting caught in the corner of the flange 7 when the elastic body 12 is press-fitted into the bracket 6, a relief portion 13 may be provided on the outer flanged end surface of the elastic body 12. Moreover, if relief parts are provided at all four locations on the inner and outer end surfaces, the directionality of the elastic body 12 will be eliminated, and workability will be greatly improved.

The present invention is attached to the inner circumference of the bracket as described above,
Since relief parts are provided at least at both inner corners of the annular elastic body that is press-fitted into the outer periphery of the housing, there is no damage or entanglement of the elastic body during press-fitting, and the bending part provided on the flange of the bracket after press-fitting is avoided. The elastic body will not protrude from the gap between the housing and the housing.

[Brief explanation of drawings]

Figure 1 is a half-sectioned front view showing the mounting relationship between the bracket and yoke of a conventional small rotating machine, Figure 2 is a half-sectioned front view showing the yoke of Figure 1, and Figure 3 is the same as that of Figure 1. FIG. 4 is a half-sectional view showing the attachment relationship between the bracket and yoke of a small rotating machine using an annular elastic body; FIG. 5 is a half-sectional view showing the elastic body of FIG. 4. Figure 6 is a half-sectional view showing the bracket in Figure 4;
FIG. 7 is an enlarged view of a portion of FIG. 4, FIG. 8 is a half-sectional front view showing a yoke in which the housing and end bracket are formed separately, and FIG. 9 is a cross-sectional view showing the elastic body used in the present invention. , FIG. 10, FIG. 11, and FIG. 12 are half-sectional front views showing other embodiments of the elastic body used in the present invention. 1...Housing, 6...Bracket, 8...Housing, 1
2...Elastic body, 13..." relief part, 14...C chamfer as relief part. Sun - Prisoner 2 figures 3 figures Shigeru 4 Nagita s Genshi 5 figures 7 Leopard 8 figures? Zuzu'o zu huan''zu zu'z zu

Claims (1)

[Claims] 1. A ring-shaped elastic body is attached to the inner circumference of the bracket, and the bracket is fixed to the rotating machine by press-fitting the elastic body from the axial end of the rotating machine to the outer circumference of the housing of the rotating machine, in which the annular elastic body is fixed to the rotating machine. A structure of an elastic body for mounting a bracket of a small rotating machine, characterized in that a relief part is formed around the entire circumference of at least both corners of the body facing the housing.