JPS627486B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sample holding device for vibration testing.

In recent years, there has been an increasing demand for reliability in products, parts, devices, and the like. In particular, as devices and components have become smaller and more complex, it has become increasingly important to check their reliability against vibrations. For example, there are cases where a device is strong against vibration in a certain direction but weak in a specific direction. Therefore, there is a need for equipment that can perform vibration tests not only in a single direction but also in all directions.

However, conventional vibration testing machines generally only vibrate in one direction, and in order to perform a test in a different direction, it is necessary to re-fix the sample in the desired direction. However, depending on the shape of the sample, vibration testing in a predetermined direction may be impossible or extremely difficult even if possible.

The present invention overcomes these difficulties and provides a sample holding device that can fix a sample in almost any direction and perform a vibration test.

That is, the sample holding device of the present invention includes a splittable hollow spherical fixed member, a hollow spherical movable member that contacts the spherical surface of the inner wall of the fixed member, and a sample holding section provided inside the movable member. and a stop means provided on the fixed member for fixing the movable member to the fixed member by engaging with a plurality of engaging portions provided on the surface of the movable member.

Note that the fixing member is provided with a support part that can be fixed at a fixed position to the sample installation part of the vibration tester.

If a large number of engaging parts for the stop means provided on the fixed member are provided on the surface of the movable member as described above,
By changing the engagement position of the movable member with the engaging portion by the stop means, the fixing position of the movable member with respect to the fixed member can be changed almost arbitrarily. Therefore, the sample can be vibrated in almost any direction depending on the position of the engaging portion.

The present invention will be explained below using examples.

FIG. 1 is a longitudinal sectional view of the sample holding device of the embodiment, and FIG. 2 is a plan view of the lower half portion.

Reference numeral 1 denotes a hollow spherical fixing member in which hollow hemispheres 1a, 1a are joined together, and supporting plates 2, 2 for fixing to a vibration testing machine are welded to both poles of the fixing member. The support plate 2 has holes 3 for attaching it to a vibration tester.
There are 3. Further, the hemispheres 1a, 1a are provided with joint parts 4, 4, and are connected by bolts 5.

Reference numeral 6 denotes a hollow spherical movable member, which has a size that allows it to come into close contact with the inner wall surface of the fixed member 1, and is designed to be able to freely rotate within the member 1. This movable member is also a combination of two hollow hemispheres 6a, 6a, and is connected by, for example, providing a protrusion 7 on the end face of one hemisphere and fitting it into a recess 8 provided on the end face of the other hemisphere. be done.

Although this movable member 6 is omitted in FIGS. 1 and 2, as shown in FIGS. 3 and 4, a sample holding portion is provided in the hollow portion. That is, inside one hemisphere, a rod 9 is projected toward the center of the sphere, and a fixed plate 10 and a movable plate 11 are attached to this rod. Movable plate 1
1 fits into the four guide rods 12 fixed to the fixed plate 10, and is adapted to move up and down in close contact with the rods 9 without rattling, and the distance between the guide rods 12 and the fixed plate 10 is adjusted by bolts 13. can be adjusted.
Reference numeral 14 denotes a rod provided on the other hemisphere, which fits into the tip of the rod 9 at its uneven portion.

15 is a set screw provided at a suitable position on the fixing member 1;
The movable member 6 is fixed by being screwed into a screw hole 16 provided on the surface of the movable member 6.
Although the figure only shows one pair of set screws 15 for regulating the fixed position of the movable member 6 with respect to the fixed member 1 and a pair of screw holes 16 for engaging the screws, there are many screw holes on the surface of the movable member. 16, and by engaging a set screw 15 in one of these screw holes, the fixed position of the movable member relative to the fixed member can be changed. Incidentally, meridians and latitudes are drawn on the surface of the movable member 6 like a globe, so that the fixed position of the movable member 6 can be measured. Reference numeral 17 denotes a sample that is sandwiched and fixed between the fixed plate 10 and the movable plate 11.

The following describes the operating procedure for this device.

First, the sample 17 is fixed by the fixed plate 10 and the movable plate 11. At this time, the nut 13 is tightened until the movable plate 11 is fixed with the sample. After fixing the sample, the two hemispheres 6a, 6a are combined to form one sphere. At this time, the rods 9 and 14 and the convex portion 7 and the concave portion 8 are tightly brought together. The movable member 6 thus constructed is installed in the lower hemisphere of the fixed member 1. At this time, it is installed at a predetermined angle using latitude and longitude lines. Then cover the upper hemisphere and tighten with bolt 5. The movable member 6 is now fixed to the fixed member 1, but both are fixed with screws 15 to prevent slight deviations in angle due to vibration. After doing this, fix it to the sample installation part of the vibration tester.

Since the sample holding device of the present invention fixes the spherical movable member having the sample holding portion inside thereof to the hollow spherical fixed member as described above, the fixing position of the movable member can be easily and almost arbitrarily set. It can be changed. Therefore, the sample can be vibrated in any direction, and the angular dependence of the intensity of the vibration of the test object can be determined. In particular, by being able to measure the angular dependence of vibration intensity in complex devices and parts, parts vulnerable to vibration can be discovered at an early stage.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a sample holding device according to an embodiment of the present invention, FIG. 2 is a plan view of the lower half thereof, and FIG.
The figure is a longitudinal sectional view of the movable member, and FIG. 4 is a bottom view of the upper half thereof. 1... Fixed member, 2... Support plate, 6... Movable member, 15... Set screw, 16... Screw hole, 17...
…sample.

Claims (1)

[Scope of Claims] 1. A divisible hollow spherical fixed member held by a support part, a hollow spherical movable member that contacts the spherical surface of the inner wall of this fixed member, and a sample provided inside this movable member. For vibration testing, comprising: a holding part; and a stop means provided on a fixed member for fixing the movable member to the fixed member by engaging with a plurality of engaging parts provided on the surface of the movable member. Sample holding device. 2. The sample holding device for vibration testing according to claim 1, wherein longitude lines and latitude lines are drawn on the surface of the movable member so that the fixed position of the movable member can be measured.