JPH0128443Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a vibration testing device.

In a conventional vibration testing apparatus, a vibration exciter is supported on a base, and a test object is mounted on the vibration table of the vibration exciter.

By the way, some vibration tests require applying vertical and horizontal excitation forces to the test object without changing the posture of the test object.

However, in the conventional vibration testing apparatus, the excitation force in the vertical direction and the excitation force in the horizontal direction can only be applied when the posture of the test object is changed.

Therefore, in such cases, the test object is removed from the vibration table, and then reattached to the vibration table so that the test object maintains its original position before conducting the vibration test. With conventional methods, testing is time-consuming, and depending on the shape of the test object, the mounting method differs between horizontal and vertical vibrations, requiring the use of special jigs. Another problem is that the extra weight increases, which limits the range of use.

Therefore, if the test object is heavy, a dedicated horizontal shaking table is required.

This invention aims to solve these problems, and is a vibration testing device that has a simple configuration and can apply excitation force from a desired direction without changing the posture of the test object. The purpose is to provide

Therefore, the vibration test device of the present invention is equipped with a vibration table on which a test object can be mounted, a force transmission rod whose one end is pivotally connected to the vibration table, and a vibration exciter that generates an excitation force. A force transmitting member having two orthogonal arm portions and oscillated by the vibration exciter is pivotally attached to the main body of the apparatus, and the force transmitting member is pivotably attached to the apparatus main body, so that the force transmitting member can be attached to the test object without changing the apparatus position of the test object. The rod is characterized in that the other end of the rod is configured to be selectively attachable to and detachable from the two arm portions in order to selectively apply excitation forces in two directions.

Below, a vibration test device as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is an elevation view thereof, Fig. 2 is a partial plan view thereof, and Fig. 3 shows a state in which it is operated in a manner different from that shown in Fig. 1. FIG. 4 is an elevational view showing a modification thereof.

As shown in FIG. 1, a vibration table 2 for mounting a test object is provided on a fixed table 1 as the main body of the apparatus via a support part 3.

As shown in FIG. 2, the support part 3 includes a horizontal support shaft 5a that projects horizontally from the side of the vibration table 2.
, a vertical support shaft 5b vertically protruding from the fixed base 1, and a support member 4 serving as an orthogonal two-axis bearing.

This support member 4 has a horizontal hole 4a as a bearing for the horizontal support shaft 5a, and a vertical support shaft 5a.
A vertical hole 4b serving as a bearing is formed, and this horizontal hole 4a and a horizontal support shaft 5a
The vertical hole 4b and the vertical support shaft 5b are configured to fit into each other.

With such a configuration, the vibration table 2 can be vibrated in either the vertical direction or the horizontal direction.

Further, the vibration table 2 is also supported by an air spring 10, which prevents the support member 4 and the fixed table 1 from coming into contact with each other, and allows smooth vibration in the horizontal and vertical directions. It's becoming like that.

By the way, the protrusion 2 at the center of the lower part of this vibration table 2
One end of a force transmitting rod 9 is pivotally connected to a.

Further, a vibration exciter 6 that generates an excitation force is disposed on the fixed base, and this vibration exciter 6 is connected to the rod 6.
a is designed to reciprocate horizontally in the axial direction.

Furthermore, a cross-shaped arm member 8 serving as a force transmitting member is pivotally attached to the support member 7 with the fixed base 1 at its intersecting center portion via a pin 8d.

In a stationary state, this arm member 8 has an arm part 8a that projects horizontally, an arm part 8b that projects upward, and an arm part 8c that projects downward, and has an overall cross-shaped shape for balance. It is configured as.

In addition, the arm portion 8c of the arm member 8 and the vibration exciter 6
The vibration exciter 6 is pivotally connected to the rod 6a, and the other end of the force transmitting rod 9 can be pivotally connected to either the arm portion 8a or the arm portion 8b, which are orthogonal to each other. A vibration test can be performed by transmitting the excitation force from the vibration table 2 to the vibration table 2 in the vertical or horizontal direction.

That is, as shown in FIG. 1, when the other end of the force transmission rod 9 is connected to the arm part 8a, the horizontal vibrations applied to the arm member 8 by the vibrator 6 are converted into vertical vibrations for force transmission. In addition to the rod 9, the vibration table 2 is vibrated in the vertical direction.

In addition, as shown in FIG. 3, a force transmission rod 9
When the other end is connected to the arm part 8b, the horizontal vibration applied to the arm member 8 by the vibrator 6 is also applied to the force transmission rod 9 as a horizontal vibration, and the vibration table 2 is vibrated in the horizontal direction. be done.

In this way, the vibration direction of the vibration table 2 can be easily changed by simply changing the pivot point of the force transmission rod 9 without changing the posture or position of the vibration table 2.

In order to reduce the bending moment applied to the vibration table 2, the protrusion 2a is not provided at the center of the lower end of the vibration table 2, and a force transmitting rod 9 is directly attached to the lower central part 2b of the vibration table 2, as shown in FIG. One end may be pivoted.

As detailed above, according to the vibration test device of the present invention, it is possible to apply an excitation force in a desired direction to a test object with a simple configuration without changing the device position of the test object. This has the advantage of simplifying the necessary operations and enabling efficient vibration testing.

[Brief explanation of drawings]

The figures show a vibration testing apparatus as an embodiment of the present invention, in which Fig. 1 is an elevation view, Fig. 2 is a partial plan view thereof, and Fig. 3 shows a vibration testing device in operation different from that shown in Fig. 1. Elevation view, FIG. 4 is an elevation view showing a modification thereof. DESCRIPTION OF SYMBOLS 1...Fixed base as the main body of the device, 2...Vibration table, 2a...Protrusion at the center of the lower part of the vibration table, 2b...
Lower central part of the shaking table, 3... Support part, 4... Support member, 4a, 4b... Hole, 5a, 5b... Support shaft,
6... Vibrator, 6a... Rod, 7... Support member, 8... Arm member, 8a to 8c... Arm part, 8d... Pin, 9... Force transmission rod, 10
...Air spring.

Claims (1)

[Scope of utility model registration request] It is equipped with a vibration table on which a test object can be mounted, a force transmission rod whose one end is pivotally connected to the vibration table, a vibrator that generates an excitation force, and two orthogonal arms. A force transmitting member oscillated by the vibrator is pivotally connected to the main body of the apparatus, and selectively applies excitation forces in two directions to the test object without changing the mounting position of the test object. The other end of the rod is configured such that the other end thereof can be selectively attached to and detached from the two arm portions.
Vibration test equipment.