KR200335646Y1 - Vibration Direction Conversion Device and Vibration Testing Apparatus Equipped with It - Google Patents

Abstract

The present invention relates to a vibration direction switching device and a vibration testing device having the same. In the present invention, a device for converting the vertical movement of the vertical axis to the horizontal movement of the test bed, the drive block is attached to the lower end of the vertical axis and the inclined surface having a predetermined slope on the bottom, at one end of the test bed Vibration direction switching device comprising a driven block coupled to the horizontal movement in the horizontal direction in accordance with the vertical movement of the drive block, and the bearing provided on the driven block and in contact with the inclined surface of the drive block and the vibration test device having the same Is provided.

The apparatus for turning a direction changer according to the present invention is mounted on a vibration tester having a vertical stroke, which is normally used, and an elastic member is installed to enable automatic return of the test bed. It can be effectively used as a vibration tester for applying vibration, and thus, it is possible to perform a horizontal vibration test at low cost without producing or purchasing a separate horizontal tester. On the other hand, there is no need to secure a large space according to the installation of a separate tester vibrating in the horizontal direction, it is advantageous to the selection of the test site.

Description

Vibration Direction Switching Device and Vibration Test Device With Them {Vibration Direction Conversion Device and Vibration Testing Apparatus Equipped with It}

The present invention relates to a vibration direction switching device and a vibration test apparatus using the same, and more particularly, a vibration direction switching device and a vibration test having the same to perform a horizontal vibration test using a vertical vibration test device Relates to a device.

For example, in order to examine the ground behavior due to an earthquake in advance, an experimental study is performed to predict the actual ground behavior after artificially generating a vibration in the ground model using a vibration generator. These vibration tests are made for a variety of purposes and uses, in addition to the purpose of studying the behavior of the ground caused by earthquakes.

For example, the vibration test apparatus used in the vibration experiment for the prediction of the ground behavior by the earthquake is similar to the actual ground by moving the test bed in which the scaled model structure is installed in the horizontal direction by using the force generated by the actuator. As a device for applying vibration to a scale model, it is used for vibration testing for various purposes in industry, academia, etc.

In the conventional vibration test apparatus, the hydraulic cylinder apparatus which retreats in a horizontal direction was mainly used in order to generate a vibration of a horizontal direction. However, in the case of the vibration test apparatus using the hydraulic cylinder device advancing in the horizontal direction, since the cylinder advancing direction of the vibration test apparatus and the vibration direction of the test bed are both in the horizontal direction, since the apparatus must be arranged in a line, the vibration test In order to carry out a large area is required. Therefore, the conventional vibration test apparatus has a considerable limitation in the installation place.

In addition, since a separate horizontal vibration device, such as a hydraulic cylinder device for generating a horizontal vibration must be manufactured or purchased, there is a disadvantage that the equipment cost for experiments is high.

On the other hand, test equipments having vertical strokes are widely used in university laboratories and laboratories of respective companies for compression tests and vibration tests of materials such as concrete.

The test apparatus having the vertical stroke generally includes a test box in which a specimen or a test target structure is installed, an actuator that applies a load or vibration to a test specimen or a test target structure installed in the test box, a test specimen or a test target structure installed in the test box. It consists of sensors that measure the effect on the device.

Here, if the force generated in the actuator of the conventional test apparatus having the vertical stroke can be converted into a force in the horizontal direction through a separate vibration direction switching device, it is possible to perform a horizontal vibration test using this Thus, the cost for the experiment can be greatly reduced, and the place required for the test can be reduced.

Therefore, the present inventors have developed a vibration direction switching device capable of efficiently converting a vertical linear motion into a horizontal linear motion, and have developed a vibration test device having such a vibration direction switching device.

The present invention has been developed to solve the problems of the prior art as described above, and to meet the needs of the related field, the object of the present invention is to apply the force generated in the actuator of the test apparatus having a vertical stroke in the horizontal direction It is to provide a vibration direction switching device that can be converted into a force.

In addition, an object of the present invention is to provide a vibration test apparatus equipped with a direction changing device capable of performing a horizontal vibration test by installing the vibration direction switching device as described above in a test device having a vertical stroke. .

1 is a side cross-sectional view of a vibration test apparatus equipped with a vibration direction switching device according to the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a perspective view of a test bed of a vibration test apparatus equipped with a vibration direction switching device according to the present invention reflecting another embodiment of the test bed support means.

<Explanation of symbols for the main parts of the drawings>

1: vibration test device 2: actuator

3: vertical axis 4: upper housing

5: lubrication means 6: lower housing

10: drive block 20: test bed

21: test bed support beam 22: lubrication means

23: driven block 24: bearing

25: elastic member 26: fixed shaft

27: driven shaft 28: elastic member contact plate

29: roller 30: test bed support

31: elastic member support 40: bottom plate

An object of the present invention as described above, a device for converting the vertical movement of the vertical axis in the direction of the horizontal movement of the test bed, the drive block is attached to the lower end of the vertical axis and the inclined surface having a predetermined slope on the bottom, To provide a vibration direction switching device coupled to one end of the test bed and consisting of a driven block that moves in a horizontal direction according to the vertical movement of the drive block, and a bearing provided on the driven block and in contact with the inclined surface of the drive block will be.

Here, it is preferable that the other end of the test bed is further provided with an elastic member so that the test bed can automatically return to its original position when the vertical axis rises after the bottom dead center.

In addition, the object of the present invention as described above, the vertical axis capable of linear reciprocating motion in the vertical direction, the actuator for driving the vertical axis, the test bed on which the vibration test object is placed, the vertical motion of the vertical axis is converted into horizontal motion Achieved by providing a vibration test apparatus having a vibration direction switching device configured to include a vibration direction switching device for transmitting to the test bed, and an elastic member installed at one end of the test bed to return the test bed to its original position. do.

Here, the vibration direction switching device is attached to the lower end of the vertical shaft, the drive block is formed in the inclined surface having a predetermined slope on the bottom, coupled to one end of the test bed in the horizontal direction in accordance with the vertical movement of the drive block It is preferable that it is comprised with the driven block which moves, and the bearing provided in the said driven block and contacting the inclined surface of the said drive block.

Here, in order to reduce the friction during the horizontal reciprocating motion of the test bed, the test bed is preferably supported by a support beam with a predetermined lubrication means and can move only in the horizontal direction.

Here, in order to reduce the friction during the horizontal reciprocating motion of the test bed, the test bed is supported by a test bed support having a roller at the bottom and a test object structure with a large load on the top to move only in the horizontal direction. It is desirable to be able to.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. In the embodiment shown in the drawings, the structure of the present invention has been described by illustrating a vibration test apparatus using the ground model as the vibration test object, but this is merely an example for description and the present invention is not limited thereto, and is applicable to various test objects. It can be.

Figure 1 is a side cross-sectional view of a vibration test apparatus equipped with a vibration direction switching device according to the present invention.

As shown in FIG. 1, the vibration test apparatus 1 having the vibration direction switching device according to the present invention includes a vertical axis 3 capable of linear reciprocating motion in a vertical direction, and driving the vertical axis 3. Actuator 2, a test bed 20 is installed on the test target structure (not shown), the vibration direction switching device for transmitting the movement of the vertical axis 3 to the test bed 20 and the test bed ( It is installed on one end of the 20) includes an elastic member 25 for the test bed 20 to return to the original position.

The actuator 2 is a hydraulic piston or a piston of a method of converting a rotational motion of the motor into a linear reciprocating motion using a crank shaft, in the present invention, if the linear reciprocating motion can be implemented in the vertical direction the actuator ( It does not limit the kind of 2). In particular, the actuator (2) can be used in the civil engineering, building laboratory, generally used for testing the compressive strength of specimens, vibration testing of the structure, and the like.

In the vibration test apparatus of the present invention, the vertical axis (3) is preferably provided in the upper housing (4) for guiding the linear reciprocating motion path in the vertical direction. In this case, a predetermined lubrication means 5 is provided to reduce the friction between the vertical shaft 3 and the upper housing 4. As an example of the lubrication means 5 a ball bushing is shown in FIG. 1. Below the upper housing 4 is provided a lower housing 6, the inside of which is wider than the upper housing 4, the lower end of the vertical axis 3 is located in the lower housing 6, the up and down direction To reciprocate.

The test bed 20 is provided with a predetermined lubrication means 22 to reduce friction between the test bed support beam 21 supporting the test bed 20 during the reciprocating motion in the horizontal direction. As an example of the lubrication means 22 a ball bush is shown in FIG. 1.

On the other hand, as the lubrication means 5 and 22 of the vertical shaft 3 or the test bed 20, a linear bushing, a linear guide, a ball guide, a ball stroke, etc., suitable for linear motion, in addition to the ball bush shown in FIG. This can be used.

The elastic member 25 is preferably fixed to the elastic member support 31 which is installed outside the end of the test bed 20. As shown in FIG. 1, the elastic member 25 may be installed separately from the test bed 20 but may be fixed to an end of the test bed 20. The elastic modulus of the elastic member 25 is determined in consideration of the stroke of the vertical axis 3, the elastic modulus is too large when the vertical axis 3 moves to the top dead center, so that the test bed 20 is lower The inner wall of the housing 6 should not be reached.

The support beam 21 of the test bed, the lower housing 6 of the vertical shaft 3 and the elastic member support 31 are preferably installed on a horizontal flat plate 40.

The vibration direction switching device is a device for converting the vertical motion of the vertical axis (3) into the horizontal motion of the test bed (20), which is attached to the lower end of the vertical axis (3) for vertical motion A drive block 10 having a predetermined inclination, a driven block 23 connected to the test bed 20 and moving in a horizontal direction according to the vertical movement of the drive block 10, and the driven block 23. It is configured to include a bearing 24 provided in the contact with the inclined surface of the drive block (23).

2 is a cross-sectional view of the driven block of FIG. 1 taken along line A-A. As shown in FIG. 2, the bearing 24 provided in the driven block 23 has a structure in which an inner ring thereof is coupled to a fixed shaft 26 and an outer ring rotates in contact with the drive block. The configuration of the bearing 24 is only one embodiment, the configuration of the bearing 24 in the present invention is not limited thereto.

3 illustrates an embodiment in which a ground model is installed in a test bed for a horizontal vibration test of the ground.

Figure 3 shows an example of performing a vibration test of the ground on the ground model using a vibration tester equipped with a vibration direction switching device according to the present invention. However, the ground vibration test shown in FIG. 3 is an example of a test using the vibration test apparatus according to the present invention. As described above, the vibration test apparatus according to the present invention is not limited thereto and may be used for various vibration tests.

As shown in FIG. 3, when a large load model is used for the experiment, a test bed support 30 having a plurality of rollers 29 is provided on the bottom plate 40 to support the test bed 20. It is safe to install and use. In this case, if necessary, the driven block 23 may be coupled to the test bed 20 by the driven shaft 27 rather than directly connected to the test bed 20. In addition, the elastic member contact plate 28 in contact with the elastic member may be separately installed.

Referring to the movement of the test bed 20 by the contact between the drive block 10 and the bearing 24 of the vibration direction switching device is as follows.

As the vertical shaft 3 descends, the drive block 10 abuts the bearing 24. In this state, if the vertical shaft 3 continues to descend, the bearing 24 is rotated in contact with the inclined surface of the drive block 10, and the driven block 23 is thereby retracted. The test bed 20 is moved by the test bed support beam 21 provided with the lubrication means 22 in a state where it is restrained with respect to the vertical direction and is movable only in the horizontal direction. do. As the test bed 20 moves in the horizontal direction, the elastic member 25 provided at the end of the test bed 20 is gradually compressed.

When the vertical axis 3 reaches the bottom dead center and starts to rise again, the bearing 24 which is in contact with the drive block 10 again rotates along the inclined surface of the drive block 10, and the compressed elastic By the restoring force of the member 25, the test bed 20 and the driven block 23 are horizontally moved forward to return to their original positions.

In this manner, the vertical reciprocating motion of the vertical axis 3 is converted to the horizontal reciprocating motion so that the test bed 20 can be reciprocated in the horizontal direction.

By adjusting the inclination angle of the inclined surface of the drive block 10 it is possible to adjust the ratio of the horizontal movement amount of the test bed 20 to the vertical movement amount of the vertical axis (3).

On the other hand, the actuator 2 is preferably hydraulic, but it is also possible to use a crank mechanism and a motor for converting the rotational drive of the motor into linear reciprocating motion of the vertical axis 3.

As described above, the laboratory apparatus is generally provided in a laboratory by attaching the direction change device according to the present invention to a vibration test apparatus having a vertical stroke, which is normally used, and installing an elastic member to enable automatic return of the test bed. The test apparatus can be effectively utilized as a vibration test apparatus that applies vibration in the horizontal direction.

Therefore, it is possible to perform the horizontal vibration test at a low cost without having to manufacture or purchase a separate horizontal tester.

Particularly, in the present invention, since the vibration in the vertical direction is converted to the vibration in the horizontal direction, the necessity of securing a large space by installing a separate test apparatus that vibrates in the horizontal direction is eliminated, which is advantageous for the selection of an experimental place. do.

In the above, specific preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiment, and any person having ordinary knowledge in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the utility model registration claims. Would be possible.

Claims (6)

An apparatus for converting the vertical movement of the vertical axis 3 into the horizontal movement of the test bed 20, A driving block (10) attached to a lower end of the vertical shaft (3) and having an inclined surface having a predetermined slope on a bottom surface thereof; A driven block 23 coupled to one end of the test bed 20 and moving in a horizontal direction according to the vertical movement of the driving block 10; And Vibration direction switching device, characterized in that consisting of a bearing (24) provided in the driven block (23) and abuts the inclined surface of the drive block (10). According to claim 1, wherein the other end of the test bed 20 is further provided with an elastic member 25, the test bed 20 automatically when the vertical axis (3) is raised after passing through the bottom dead center. Vibration direction switching device characterized in that to return to the original position. A vertical axis 3 capable of linear reciprocating motion in the vertical direction; An actuator (2) for driving said vertical axis (3); A test bed 20 on which the vibration test object is placed; A vibration direction switching device for converting the vertical motion of the vertical axis (3) into a horizontal motion and transferring it to the test bed (20); And And a resilient member (25) installed at one end of the test bed (20) to allow the test bed (20) to return to its original position. According to claim 3, The vibration direction switching device, A driving block (10) attached to a lower end of the vertical shaft (3) and having an inclined surface having a predetermined slope on a bottom surface thereof; A driven block 23 coupled to one end of the test bed 20 and moving in a horizontal direction according to the vertical movement of the driving block 10; And Vibration test apparatus provided with a vibration direction switching device, characterized in that it is composed of a bearing (24) provided in the driven block (23) and abuts the inclined surface of the drive block (10). 5. The test bed support beam according to claim 3 or 4, in order to reduce friction during horizontal reciprocation of the test bed (20), the test bed (20) is provided with a test bed support beam equipped with a predetermined lubrication means (22). Vibration test apparatus provided with a vibration direction switching device, characterized in that supported by (21) can move only in the horizontal direction. The test bed support 30 according to claim 3 or 4, wherein the test bed 20 is provided with a roller 29 at a lower portion thereof in order to reduce friction during horizontal reciprocation of the test bed 20. Vibration test apparatus equipped with a vibration direction switching device, characterized in that the structure to be supported by the) and a large load on the upper part is movable only in the horizontal direction.