JP3056882B2 - Vibration detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration detecting device provided with a vibration detector.

[0002]

2. Description of the Related Art Conventionally, there are various types of vibration detectors, but many vibration detectors can only measure vibration in a specific direction. However, in reality, multi-directional vibrations interfere with the object to be measured.

The conventional vibration detector is mounted directly on the object to be measured or via a mounting base of a rigid bracket, so that vibrations in directions other than the measurement direction are also transmitted to the vibration detector. There is a disadvantage that the detection accuracy of the vibration in the direction to be measured is inferior. In addition, this was a cause of the failure of the vibration detector.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a vibration detector is held by an elastic body from multiple directions, and a vibration from a direction other than a specific direction (measurement direction) is buffered by an elastic force so as not to be transmitted to the vibration detector. By installing a vibration detector mounting base,
It is an object of the present invention to provide a vibration detection device that can increase the detection accuracy of a vibration detector in a measurement direction and can increase durability.

[0005]

SUMMARY OF THE INVENTION The present invention provides a hollow mounting base fixed to an object to be measured, a low friction plate stretched on the inner bottom surface of the mounting base, and a movable member mounted on the low friction plate. A vibration detector comprising: a vibration detector installed in a base, a strong elastic body that suppresses the vibration detector from above the inside of the mounting base, and a weak elastic body that suppresses the vibration detector from the inner side surface of the mounting base. Device.

[0006]

In the vibration detecting device according to the present invention, a hollow mounting base is fixed to an object to be measured, a low friction plate is provided on the inner bottom surface of the mounting base, and a vibration detector is movably mounted on the low friction plate. And
The vibration detector is suppressed by a ferroelastic body from above the inside of the mounting base, and the vibration detector is suppressed by a weak elastic body from the inner side surface of the mounting base.

[0007]

Next, an embodiment of the present invention will be described. In FIG. 1, reference numeral 1 denotes a hollow mounting base fixed to the DUT 6,
Is a low friction plate stretched on the inner bottom surface of the mounting base 1, 3 is a vibration detector movably installed on the low friction plate 2, and 4 is a vibration detector that suppresses the vibration detector 3 from above the mounting base 1. The ferroelastic body 5 is a weak elastic body that suppresses the vibration detector 3 from the inner side surface of the mounting table 1. The vibration detector mounting table of the present embodiment has a plurality of elastic supports that support the vibration detector from multiple directions. And a rigid bracket that supports the elastic body from multiple positions and is directly fixed to the object to be measured, and transmits the vibration transmitted from the object to the vibration detector in a specific direction (measurement direction). ) Other than the above, the vibration detector is supported by an elastic body without direct contact with the rigid bracket in the direction in which vibration is to be excluded, so that it can be excluded by damping with elastic force. Vibration detector on one side in the direction in which you want to transmit vibration (measurement direction) A vibration detector mounting base characterized in that the vibration transmitted from the DUT to the vibration detector is elastic except in a specific direction (measurement direction). It can be excluded by buffering with the elastic force of the body. That is, the mounting table 1 of the vibration detector supports the vibration detector 3 from multiple directions, supports the coil spring from multiple positions, and is directly fixed to the DUT 6. It has a rigid box-shaped bracket, so that the vibration transmitted from the DUT 6 to the vibration detector 3 can be excluded by buffering it with elastic force except for the measurement direction. A strong coil spring [strong] presses against the inner surface of the box-shaped bracket from one side, but in the direction intersecting with the measurement direction, a coil spring with weak elasticity [weak], etc., detects vibration from the outer box-shaped bracket. 3 is supported so as to be pulled, and is not directly connected to the box-shaped bracket. The contact between the coil spring [strong] and the vibration detector 3 and the contact between the vibration detector 3 and the box-shaped bracket have extremely low friction. The DUT 6 and the box-shaped bracket are firmly fixed with bolt screws 7. The vibration from the DUT 6 is transmitted without being excluded in the measurement direction because the DUT 6 and the box-shaped bracket, and the box-shaped bracket and the vibration detector 3 are directly connected to each other. However, vibrations in directions other than the measurement direction are buffered and weakened by the coil spring [weak] and transmitted to the vibration detector 3.

In the case of this embodiment, since vibrations from directions other than the measurement direction are weakened and transmitted to the vibration detector, it is possible to improve the detection accuracy of the vibration detector in the vibration measurement direction and to increase the durability. it can.

In another embodiment, (1) the elastic body is not limited to a coil spring, but may be a leaf spring, a spiral spring, rubber, a sponge, an air damper, an oil damper,
Others are not particularly limited.

(2) There is no limitation on the number of elastic bodies and the mounting direction.

(3) The vibration detector pressed against the rigid bracket from one side by an elastic body in the measurement direction
Instead of being directly connected to the rigid bracket, a rolling object 8 (ball, cylinder) may be interposed as shown in FIG.

[0012]

According to the present invention, the durability of the vibration detector can be improved, and the detection accuracy in the vibration measurement direction can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vibration detecting device according to an embodiment of the present invention.

FIG. 2 is a sectional view of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting stand 2 Low friction plate 3 Vibration detector 4 Strong elastic body 5 Weak elastic body

Claims (1)

(57) [Claims] 1. A hollow mounting base fixed to an object to be measured, a low friction plate stretched on an inner bottom surface of the mounting base, and a vibration detector movably mounted on the low friction plate. A vibration detecting device comprising: a strong elastic body that suppresses the vibration detector from above the inside of the mounting base; and a weak elastic body that suppresses the vibration detector from the inner side surface of the mounting base.