JPH0543399Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a linear guide for a vibrating part (table) in a vibration testing machine equipped with an electrodynamic vibration generator.

[Conventional technology]

A conventional vibration testing machine equipped with an electrodynamic vibration generator is shown in Fig. 2, which has a magnetic field forming mechanism consisting of a yoke section 2 with an excitation coil 1 that receives a direct current, and a pole piece 3. M is provided, and an annular gap 4 is formed between the yoke portion 2 and the pole piece 3.

Therefore, a DC magnetic field is formed in this gap 4.

Further, a moving coil 7 as a moving member that receives alternating current from an external power source 5 via a lead wire 6 is inserted into the gap 4, and the moving coil 7 is supported by a spring 8. It is connected to a table (vibration member) 9.

The table 9 is supported by the upper surface of the pole piece 3 via a spring 8 so as to be able to vibrate back and forth in the vertical direction in the figure (see arrow P), and serves as a mounting table for a specimen (not shown). ing.

Further, the table 9 is guided by a plate spring 10 as a linear guide attached to a support member 11 so that the table 9 can smoothly reciprocate in the vertical direction.

That is, a leaf spring 10 is disposed between the side wall of the table 9 and a supporting member 11 around the table 9, so that the side wall of the table 9 is supported and guided by the leaf spring 10.

With this structure, when a DC current is passed through the excitation coil 1 and an alternating current is passed through the movable coil 7, this alternating current interlinks with the magnetic flux in the gap 4, so an electromagnetic force is generated, and the table 9 is Vibrate.

However, in such a conventional device, when the table 9 is displaced in the y direction (see FIG. 3),
The attachment point of the leaf spring 10 to the table 9 is also displaced in the y direction, but since the attachment point of the leaf spring 10 to the support member 11 is immovable, in order for the table 9 to be displaced in the y direction, the leaf spring 10 must be moved. The condition is that it stretches in the longitudinal direction.

In this way, the displacement of the table 9 in the y direction cannot be obtained unless it is accompanied by the displacement in the x direction, which is the elongation of the leaf spring 10. Therefore, in the linear guide shown in FIG. 2, the linear guide is a very hard spring. There is a problem with this.

In order to solve this problem, a linear guide was proposed as shown in FIG. 4 (schematic diagram).

That is, in FIG. 4 (schematic diagram), a leaf spring 15 is disposed between the table 9 and the support member 11, with its inner end fixed to the table 9 and its outer end fixed to a bracket 14, and a linear guide is proposed in which the bracket 14 is supported via another leaf spring 16 relative to the support member 11 so as to be movable up and down.

[The problem that the idea aims to solve]

By the way, in the conventional linear guide shown in FIG. 4, although a large displacement in the y direction can be obtained, the plate spring 15 has a unique frequency called surging, and there is a problem that a large resonance occurs at that frequency. In addition, when the table 9 moves upward or downward from the neutral position (at this time, the leaf springs 15 are in a horizontal state), each leaf spring 15 is pulled toward the center with this movement. In other words, the table 9 is vibrated in the y direction by pulling the leaf spring 15 toward the center or pushing it back. Therefore, in order to smoothly vibrate the table 9 in the y direction, another leaf spring 1 that holds the leaf spring 15 is used.
The table 9 is prevented from being excessively restrained by using a material having low rigidity as the table 6. As a result, there is a problem that the spring constant with respect to the force applied in the x direction decreases.

The present invention attempts to solve these problems, and in a vibration testing machine, the table is placed between the table that can vibrate reciprocally and the support member provided around the table. In providing a leaf spring that can be elastically supported and guided, the inner end of the leaf spring is fixed to the side surface of the table, and the outer end of the leaf spring is supported by the supporting member via an elastic body, and A linear guide for a vibration testing machine, which increases the rigidity of the leaf spring in the x direction and reduces the amplitude of resonance of the leaf spring by disposing its outer edge in a neutral position so as to contact the inner wall surface of the support member. The purpose is to provide

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the linear guide in the vibration testing machine of the present invention has the following features:
A table capable of reciprocating vibration by a drive mechanism, a support member provided around the table, and a support member provided between the table and the support member to elastically support the table with respect to the support member. a guideable leaf spring, the inner end of which is fixed to the side surface of the table, the outer end of which is supported by the supporting member via an elastic body, and which is in a neutral state; In some cases, the outer edge thereof is arranged so as to be in contact with the inner wall surface of the support member.

[Effect]

In the linear guide in the above-mentioned vibration testing machine of the present invention, since the outer end of the leaf spring is not fixed to the support member, the vibration direction of the table (y direction)
It has a soft effect on the skin. Further, since the outer edge contacts the inner wall surface of the support member when in the neutral position, it acts hard in the direction perpendicular to the y direction (x direction).

Furthermore, the elastic body interposed between the vicinity of the outer end of the leaf spring and the support member acts to reduce the amplitude of resonance of the leaf spring.

〔Example〕

Hereinafter, a linear guide in a vibration testing machine as an embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a side sectional view of the main part. Note that the same reference numerals in FIG. 1 as in FIGS. 2 to 4 indicate substantially the same members.

The vibration tester of this embodiment also has a table 9 that can be reciprocally vibrated (vibrated in the y direction) by an electrodynamic vibration generator.
and a support member 11 provided around the table 9.
and a leaf spring 20 serving as a guide member interposed between the table 9 and the support member 11.

The leaf spring 20 is constructed by bonding two leaf springs back to back with double-sided tape.The inner end of the leaf spring 20 is fixed to the side surface of the table 9, and the outer end is attached to the supporting member 11 via silicone rubber 21. is supported by

Two pieces of silicone rubber 21 are attached to the upper and lower surfaces near the outer end of the leaf spring 20 by baking, and the other side of each silicone rubber 21 is baked to the support member 11 to attach the support member 11 of the leaf spring 20. Installation is being carried out.

Furthermore, when the leaf spring 20 is in neutral, its outer edge 20
a is arranged so as to be in contact with the inner wall surface 11a of the support member 11. Note that a thin sheet with high rigidity is attached to the inner wall surface 11a to form the outer edge 2 of the leaf spring 20.
When configured so that 0a contacts this sheet,
Noise generated when the outer edge 20a and the inner wall surface 11a come into contact can be reduced.

With the above-described configuration, the outer end of the leaf spring 20 is not fixed to the support member 11, so when the table 9 vibrates in the y direction, the leaf spring 20 itself does not have to expand or contract, so the table 9 is a leaf spring. At 20, you won't be overly constrained. In other words, soft support can be provided in the vibration direction (y direction) of the table 9.

On the other hand, in the x direction perpendicular to the y direction, when the outer edge 20a of the leaf spring 20 is neutral, the support member 11
Since it comes into contact with the inner wall surface 11a of the plate spring 20, the tensile and compressive stiffness values of the leaf spring 20 itself are equal to each other.

Further, near the outer end of the leaf spring 20 and the support member 1
The amplitude of the resonance of the plate spring 20 is reduced by the silicone rubber 21 interposed between the plate spring 20 and the plate spring 20 .

[Effect of idea]

As detailed above, the linear guide in the vibration testing machine of the present invention provides the following effects and advantages.

(1) A linear guide with spring characteristics that is soft in the direction in which a large displacement is desired (the y direction) and hard in the direction perpendicular to this direction (the x direction) can be obtained.

(2) The amplitude of resonance of the leaf spring can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a linear guide in a vibration testing machine as an embodiment of the present invention, and FIG.
Figure 4 shows a linear guide in a conventional vibration testing machine, Figure 2 is a side sectional view showing its schematic configuration, Figure 3 is a schematic diagram thereof, and Figure 4 is a schematic diagram of another modification. be. 1... Excitation coil, 2... Yoke part, 3... Pole piece, 5... Power supply, 6... Lead wire, 7...
... Moving coil, 9... Table, 10... Leaf spring, 11... Supporting member, 15, 20... Leaf spring,
21...Silicone rubber.

Claims (1)

[Scope of utility model registration request] In a vibration testing machine, a table that can be vibrated back and forth by a drive mechanism, a support member provided around the table, and a support member provided between the table and the support member that allows the table to vibrate elastically with respect to the support member. a leaf spring that can be guided while being supported by the table; the inner end of the leaf spring is fixed to the side surface of the table, and the outer end of the leaf spring is supported by the supporting member via an elastic body; A linear guide for a vibration testing machine, characterized in that the linear guide is disposed such that its outer edge contacts the inner wall surface of the support member when in a neutral state.