JP2013205178A - Vibration test unit and vibration test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration test unit which reduces costs, is also capable of reducing energy consumption and improves profitability, and a vibration test device.SOLUTION: A vibration test unit comprises an excitation table 2 which inputs vibration to a test body, a Z-axis actuator 3 which is mounted on a frame 1 and drives the excitation table 2 in a perpendicular direction, an X-axis actuator 4 which is mounted on the frame 1 and drives the excitation table 2 in an X-axis direction, a Y-axis actuator 5 which is mounted on the frame 1 and drives the excitation table 2 in a Y-axis direction, X-axis connection means 6 which is provided between the excitation table 2 and the X-axis actuator 4, allows movement of the excitation table 2 in the Y-axis direction and regulates rotation around an X axis, and Y-axis connection means 7 which is provided between the excitation table 2 and the Y-axis actuator 5, allows movement of the excitation table 2 in the X-axis direction and regulates rotation around a Y axis.

Description

  The present invention relates to a vibration test unit and a vibration test unit.

  Conventionally, as a vibration test unit, for example, there is a unit capable of applying vibration in three axial directions of XYZ axes. Specifically, such a vibration test unit includes a vibration table and actuators that are mounted on a gantry and apply reciprocating vibration in the X-axis, Y-axis, and Z-axis directions to the vibration table.

  The vibration table is coupled to the X-axis actuator via a biaxial orthogonal linear motion bearing that allows movement in the Y-axis and Z-axis directions, and to the Y-axis actuator in the X-axis and Z-axis directions. It is connected via a bearing for two-axis orthogonal linear motion that enables movement. The vibration table is mounted on an intermediate table fixed to an actuator in the Z-axis direction via three or more two-axis orthogonal linear motion bearings that allow movement in the X-axis and Y-axis directions.

  Thus, the biaxial orthogonal linear motion bearing that enables movement in the XZ-axis direction is interposed between the Y-axis actuator and the vibration table, and movement in the XY-axis direction is performed between the intermediate table and the vibration table. Since the two-axis orthogonal linear motion bearing that can be used is interposed, when only the X-axis actuator is driven, the vibration table is driven only in the X-axis direction. Similarly, when only the Y-axis actuator is driven, the vibration table is driven only in the Y-axis direction, and when only the Z-axis actuator is driven, the vibration table is driven only in the Z-axis direction.

  In addition, this vibration test unit includes at least three guide mechanisms that receive a moment around the Z axis and prevent rotation of the vibration table around the Z axis.

JP 2001-108570 A

  The conventional vibration test unit can drive the vibration table in the three-axis direction to apply vibration in the three-axis direction to the test piece. However, in addition to the vibration table, an intermediate table is required. Because there must be three or more biaxial orthogonal linear motion bearings that allow movement in the XY-axis direction and three or more guide mechanisms between the vibration table and the intermediate table, a Z-axis actuator When applying vibration to the test piece, the Z-axis actuator adds at least the weight of the vibration table, intermediate table, three two-axis orthogonal linear motion bearings and three guide mechanisms in addition to the test piece. You must demonstrate the ability to shake.

  As described above, in the conventional vibration test unit, the Z-axis actuator must exhibit a large output, which increases the drive source of the Z-axis actuator and increases the cost. However, there is a problem that energy consumption is large and economic efficiency is lacking.

  Accordingly, the present invention has been made to solve the above-described problems, and the object of the present invention is to provide a vibration test unit and a vibration test apparatus that are low in cost and can reduce energy consumption and are economical. Is to provide.

  In order to achieve the above-described object, the problem solving means of the present invention includes a vibration table that inputs vibration to a test body, a Z-axis actuator that is mounted on a frame and drives the vibration table in a vertical direction, and the frame And an X-axis actuator that drives the vibration table horizontally and in the X-axis direction, and a Y-axis actuator that is mounted on the mount and drives the vibration table in the Y-axis direction that is horizontal and orthogonal to the X-axis direction. The vibration test unit is provided between the vibration table and the X-axis actuator, and allows movement of the vibration table in the Y-axis direction and restricts rotation around the X-axis. Provided between the X-axis coupling means, the vibration table, and the Y-axis actuator, allows movement of the vibration table in the X-axis direction and restricts rotation around the Y-axis. Characterized by comprising a that Y-axis coupling means.

  According to another aspect of the present invention, there is provided a vibration test apparatus including a plurality of vibration test units, wherein each vibration test unit includes an X-axis column, an X-axis column, and an X-axis that are erected on the mount. A reciprocating motion of the X-axis actuator is converted into a reciprocating motion in the X-axis direction of the vibration table by being rotatably attached to the other end of the actuator and the X-axis coupling means along the ZX plane. An X-axis conversion link, a Y-axis column that stands on the gantry, the Y-axis column, the other end of the Y-axis actuator, and the Y-axis coupling means are attached to be rotatable along the ZY plane. And a Y-axis conversion link for converting the reciprocating motion of the Y-axis actuator into a reciprocating motion of the vibration table in the Y-axis direction, and each X-axis actuator has one end relative to the gantry. The Y-axis actuator is rotatably mounted along the X plane and is disposed on either side of the X-axis column in the driving direction. One end of each Y-axis actuator is along the ZY plane with respect to the gantry. It is attached to be rotatable, and is arranged on either one of the two sides in the driving direction of the Y-axis support.

  In this way, the vibration table is supported by the X-axis coupling means and the Y-axis coupling means so as to be prevented from rotating and kept in a horizontal state. Therefore, the weight borne by the Z-axis actuator is the same as that in the conventional vibration test unit. It is lighter than the vibration table and the components attached to it, the output of the Z-axis actuator can be reduced, and the drive source of the Z-axis actuator can be reduced in size.

  According to the vibration test unit and the vibration test apparatus of the present invention, the cost can be reduced and the energy consumption can be reduced, which is excellent in economic efficiency.

It is a top view of a vibration test device provided with a vibration test unit in one embodiment. It is a side view of the vibration test unit in one embodiment. It is an expansion bird's-eye view of the vibration table of the vibration test unit in one embodiment. It is an expanded longitudinal cross-sectional view of the vibration table of the vibration test unit in the modification of one embodiment.

  The present invention will be described below based on the embodiments shown in the drawings. As shown in FIGS. 1 to 3, the vibration test unit U according to the embodiment includes four vibration test apparatuses T in this case so as to be suitable for a vibration test using a four-wheel vehicle (not shown) as a test body. The four vibration test units U can simulate the vibration added to the vehicle body when the four-wheel vehicle actually travels. In addition, since the vibration test unit U can give vibration to a test body even if it is single, it is naturally possible to comprise a vibration test apparatus with only one vibration test unit U.

  Each vibration test unit U includes a vibration table 2 that inputs vibration to the test body, a Z-axis actuator 3 that is mounted on the gantry 1 and drives the vibration table 2 in the vertical direction, and a vibration table that is mounted on the gantry 1 and vibrates. An X-axis actuator 4 that drives the table 2 horizontally and in the X-axis direction; a Y-axis actuator 5 that is mounted on the gantry 1 and drives the vibration table 2 in the Y-axis direction that is horizontal and orthogonal to the X-axis direction; An X-axis coupling means 6 provided between the table 2 and the X-axis actuator 4 and a Y-axis coupling means 7 provided between the vibration table 2 and the Y-axis actuator 5 are configured. .

  Each vibration test unit U can drive the vibration table 2 with the Z-axis actuator 3 in the Z-axis direction which is the vertical direction that penetrates the paper surface in FIG. 1, and the vibration table 2 with the X-axis actuator 4. 1 can be driven in the horizontal direction in FIG. 1, which is the horizontal X-axis direction, and the vibration table 2 can be driven in the vertical direction in FIG. 1, which is the horizontal Y-axis direction, by the Y-axis actuator 5. It has become.

  When it is desired to perform a vibration test using a test body as a four-wheel vehicle, for example, a bracket for mounting a vehicle wheel is connected to the vibration table 2, and each vibration is performed by the Z-axis actuator 3, the X-axis actuator 4, and the Y-axis actuator 5. By driving the vibration table 2 of the test unit U, vibration can be applied to the four-wheeled vehicle. In addition, it is also possible to perform a vibration test by driving the vibration table 2 such that a four-wheeled vehicle with wheels attached to the vibration table 2 in each vibration test unit U is mounted.

  Hereinafter, each part of the vibration test unit U of one embodiment will be described in detail. In the case of this embodiment, the vibration table 2 has a rectangular disk shape, and although not shown, there are many bolt holes opened at the upper end so that the test body and the parts for connecting the test body can be fixed. Is provided. Therefore, for example, when it is desired to fix the test body to the vibration table 2, the test body may be fixed directly if it can be bolted. For example, if the test body is a vehicle, it can be connected to the bracket. You may make it connect the vibration table 2 and a vehicle via components. In addition, the shape and structure of the vibration table 2 can be appropriately changed in design so as to be suitable according to the specimen.

  As shown in FIG. 2, the Z-axis actuator 3 is a telescopic hydraulic servo cylinder in this example, and is extended and contracted by supplying and discharging pressure oil from a hydraulic source outside the figure. One end is connected to the vibration table 2 described above via a table-side spherical bearing 8, and the other end is connected to the gantry 1 via a gantry-side spherical bearing 9.

  In this example, the table-side spherical bearing 8 includes a sphere 8a, a case 8b that rotatably holds the sphere 8a and is connected to the lower end of the vibration table 2, and a connection that connects the sphere 8a to the Z-axis actuator 3. A shaft 8c and a boot 8d covering from the opening of the case 8b to the middle of the connecting shaft 8c are provided. Lubricating oil is sealed between the spherical body 8a and the case 8b at a predetermined pressure, and a hydrostatic spherical surface. It is considered as a bearing. The table-side spherical bearing 8 is a hydrostatic spherical bearing in which lubricating oil of a predetermined pressure is supplied between the sphere 8a and the case 8b, so that smooth rotation of the sphere 8a with respect to the case 8b is guaranteed. In addition, since the space between the sphere 8a and the case 8b is forcibly lubricated, it has excellent wear resistance and can withstand long-term use, but a spherical bearing other than a hydrostatic spherical bearing may be used. It is also possible to eliminate the connecting shaft 8c and connect the Z-axis actuator 3 directly to the sphere 8a.

  The table-side spherical bearing 8 is allowed to swing and rotate around the sphere 8a of the connecting shaft 8c because the sphere 8a is allowed to rotate with respect to the case 8b. Therefore, swinging and rotation of the Z-axis actuator 3 with respect to the vibration table 2 are allowed. It is also possible to fix the connecting shaft 8 c to the vibration table 2 and the case 8 b to the Z-axis actuator 3.

  Also for the gantry-side spherical bearing 9, in this example, a sphere 9a, a case 9b that rotatably holds the sphere 9a and is connected to the gantry 1, a connecting shaft 9c that connects the sphere 9a to the gantry 1, and a case A boot 9d that covers from the opening of 9b to the middle of the connecting shaft 9c. Lubricating oil is sealed between the sphere 9a and the case 9b at a predetermined pressure, so that the sphere 9a is smooth against the case 9b. Since rotation is guaranteed and the space between the sphere 9a and the case 9b is forcibly lubricated, it has excellent wear resistance and can withstand long-term use, but it can be used as a spherical bearing other than a hydrostatic spherical bearing. Good. The gantry-side spherical bearing 9 is allowed to swing and rotate around the sphere 9a of the connecting shaft 9c because the sphere 9a is allowed to rotate with respect to the case 9b. Therefore, swinging and rotation of the Z-axis actuator 3 with respect to the gantry 1 are allowed. It is also possible to fix the connecting shaft 9 c to the gantry 1 and the case 9 b to the Z-axis actuator 3.

  Therefore, since the Z-axis actuator 3 can swing and rotate with respect to the gantry 1 and the vibration table 2, the X-axis direction which is the left-right direction of the vibration table 2 in FIG. Is allowed to move in the Y-axis direction, which is a direction penetrating through the shaft, and does not hinder the horizontal movement of the vibration table 2, and the vibration table 2 is driven up and down to drive the vibration table 2 in the vertical direction. be able to.

  For example, the Z-axis actuator 3 is fixed in a vertical posture with respect to the gantry 1, and a slide plate 10 is provided at the upper end of the Z-axis actuator 3 as shown in FIG. A holding portion 11 that holds the slidable member 10 may be provided so that the Z-axis actuator 3 does not hinder the horizontal movement of the vibration table 2.

  As shown in FIG. 2, the X-axis actuator 4 is a telescopic hydraulic servo cylinder in this example, and is extended and contracted by supplying and discharging pressure oil from a hydraulic source outside the figure. The one end is mounted on the gantry 1 by being hinged to the X-axis column 12 standing on the gantry 1, and is attached to the gantry 1 in such a manner that only rotation along the ZX plane is allowed. The ZX plane is a plane including the Z axis and the X axis.

  Further, the other end of the X-axis actuator 4 is hinged so that only rotation along the ZX plane is allowed to the X-axis conversion link 13 connected to the X-axis support column 12 while allowing only rotation along the ZX plane. ing. In this case, since the X-axis actuator 4 is provided along the vertical direction on the side of the X-axis support column 12 and the expansion / contraction direction is substantially vertical, the X-axis conversion link 13 is used to expand and contract the X-axis actuator 4. The motion is converted into the reciprocating motion in the X-axis direction on the vibration table 2.

  The X-axis support column 12 stands on the gantry 1, and an X-axis conversion link 13 configured by facing a pair of triangular plates 13 a and 13 b having a substantially triangular shape is rotatably attached to the upper end at the tip. It has been. Specifically, the X-axis conversion link 13 is connected to the X-axis column 12 by hinge-connecting the vicinity of one apex of the triangular plates 13 a and 13 b to the X-axis column 12. It is attached in such a manner that only rotation along the ZX plane is allowed. Further, a bracket 4a provided at one end of the X-axis actuator 4 is hinged to the vicinity of one vertex other than the vertex connected to the X-axis column 12 of the triangular plates 13a and 13b constituting the X-axis conversion link 13. When the X-axis actuator 4 expands and contracts, the X-axis conversion link 13 rotates along the ZX-axis plane around the part hinged to the X-axis support 12. The bracket 4a is hinged to each of the pair of triangular plates 13a and 13b constituting the X-axis conversion link 13, and also plays a role of integrating the triangular plates 13a and 13b. When the triangular plates 13a and 13b are integrated, a member for integrating the triangular plates 13a and 13b may be separately provided instead of using the bracket 4a provided at the end of the X-axis actuator 4.

  Further, of the vertices of the triangular plates 13 a and 13 b of the X-axis conversion link 13, the remaining vertices to which neither the X-axis support column 12 nor the X-axis actuator 4 is hinged are connected via the X-axis coupling means 6. 2 connected.

  Between the X-axis actuator side end 2 a of the vibration table 2 and the X-axis conversion link 13, X-axis coupling means 6 is provided. As shown in FIGS. 1 to 3, the X-axis coupling means 6 is configured such that one end of the X-axis actuator 4 is connected to one end of the X-axis actuator 4 in such a manner that it cannot rotate around the X-axis and can rotate along the ZX plane. Connected to the X-axis arm 14, the X-axis guide rail 15 along the Y-axis direction provided at the X-axis actuator side end 2 a of the vibration table 2, and the other end of the X-axis arm 14 rotated along the ZX plane. A pair of X-axis sliders 16 and 16 which are hinged so as to be slidably attached to the X-axis guide rail 15 in the Y-axis direction are configured.

  In this case, the X-axis arm 14 includes a pair of arm portions 14a and 14a along the X-axis direction, and a pair of connecting rods 14b and 14b that connect the arm portions 14a and 14a along the direction orthogonal to the X-axis direction. The arm portions 14a, 14a and the connecting rods 14b, 14b are shaped just like a well beam. The shape and structure of the X-axis arm 14 is not limited to the above, and in this case, the arm portions 14a and 14a and the connecting rods 14b and 14b are formed from a single base material. If there is no problem in strength, the arm portions 14a, 14a and the connecting rods 14b, 14b may be separate parts, and the X-axis arm 14 may be configured by combining them.

  Then, one arm portion 14a of the X-axis arm 14 is hinged to the vicinity of the remaining vertex where the X-axis column 12 and the X-axis actuator 4 of the triangular plate 13a of the X-axis conversion link 13 are not connected, and the X-axis The other arm portion 14a of the arm 14 is hinged to the vicinity of the remaining vertex where the X-axis column 12 and the X-axis actuator 4 of the triangular plate 13b of the X-axis conversion link 13 are not connected.

  The X-axis guide rail 15 is attached to the X-axis actuator side end 2a of the vibration table 2 along the Y-axis direction, and the Y-axis that becomes the longitudinal direction of the X-axis guide rail 15 on the X-axis guide rail 15 A pair of X-axis sliders 16 and 16 and an X-axis guide rail 15 that are slidably mounted in the direction constitute a linear guide. Although the X-axis sliders 16 and 16 are not shown in detail, for example, the X-axis sliders 16 and 16 may have a well-known configuration including a large number of balls that run in grooves provided on the side surface of the X-axis guide rail 15. If so, a slider of a type that does not include a ball may be used.

  The X-axis sliders 16 and 16 are hinged to the tips of the arm portions 14a and 14a of the X-axis arm 14 one by one so that they can rotate along the ZX plane.

  Accordingly, the X-axis coupling means 6 is coupled to the X-axis conversion link 13 as described above, so that rotation along the ZX plane is allowed while rotation around the X-axis is prevented. The rotation of the table 2 around the X axis is restricted. Only one X-axis slider 16 may be provided as long as it can regulate the rotation of the vibration table 2 around the X-axis. However, only one X-axis slider 16 may be provided. Since the moment can be received by the plurality of X-axis sliders 16 and 16, the load acting on the X-axis sliders 16 and 16 is reduced, and the vibration table 2 can be reliably prevented from rotating around the X-axis. It is.

  Further, since the X-axis arm 14 in the X-axis coupling means 6 is coupled to the vibration table 2 via the X-axis guide rail 15 and the X-axis sliders 16 and 16 constituting the linear guide, the X-axis coupling means 6 The vibration table 2 is allowed to move in the Y-axis direction. The X-axis sliders 16 and 16 are allowed to rotate along the ZX plane by the X-axis arm 14, and the X-axis arm 14 is allowed to rotate along the ZX plane by the X-axis conversion link 13. Therefore, when the X-axis actuator 4 is extended in FIG. 2, the X-axis conversion link 13 rotates counterclockwise at the hinge coupling point to the X-axis column 12 and the X-axis arm 14 is pushed to the left. The vibration table 2 can be driven in the left direction in FIG. 2. On the contrary, when the X-axis actuator 4 is contracted, the X-axis conversion link 13 is watched at the hinge connection point to the X-axis column 12. Since the X-axis arm 14 is rotated to the right and pulled to the right, the vibration table 2 can be driven rightward in FIG.

  That is, in the case of this embodiment, the X-axis conversion link 13 and the X-axis support column 12 constitute a bell crank mechanism, and the expansion and contraction motion along the substantially vertical direction of the X-axis actuator 4 is converted into the motion in the X-axis direction. The vibration table 2 can be transmitted. The X-axis conversion link 13 is composed of triangular plates 13a and 13b because it is advantageous in terms of strength. However, as described above, the expansion and contraction movement of the X-axis actuator 4 is applied to the vibration table 2. Since the movement in the X-axis direction is sufficient, the shape may be other than a triangle shape such as an L shape.

  Further, in this case, the X-axis conversion link 13 plays a role of restricting the rotation of the X-axis arm 14 around the X-axis, thereby restricting the rotation of the vibration table 2 around the X-axis. For example, the X-axis actuator 4 is installed at the upper end of the X-axis column 12 so that the expansion / contraction direction is the X-axis direction, and the X-axis arm 14 is the X-axis column. When the X-axis conversion link 13 is attached to the X-axis actuator 4 in such a manner that rotation along the ZX plane and movement in the X-axis direction are allowed while the rotation around the X-axis is restricted at the upper end of the X-axis conversion link 13, It becomes unnecessary.

  The X-axis guide rail 15 is connected to the X-axis actuator side end 2a of the vibration table 2, and the X-axis sliders 16 and 16 are connected to the X-axis arm 14 side. The X-axis sliders 16, 16 may be connected to the vibration table 2 by being connected to the arm 14, and at least one of the X-axis guide rail 15 and the X-axis slider 16 is applied to the X-axis arm 14. What is necessary is just to connect to the swing table 2 rotatably along a ZX plane.

  The Y-axis actuator 5 has the same configuration as the X-axis actuator 4. In this example, the Y-axis actuator 5 is a telescopic hydraulic servo cylinder, and expands and contracts when pressure oil is supplied and discharged from a hydraulic source (not shown). It is mounted on the gantry 1 with one end hinged to the Y-axis column 17 standing on the gantry 1 and attached to the gantry 1 in such a manner that only rotation along the ZY plane is allowed. ing. The ZY plane is a plane including the Z axis and the Y axis.

  The other end of the Y-axis actuator 5 is hinged so that only rotation along the ZY plane is allowed to the Y-axis conversion link 18 connected to the Y-axis support column 17 while allowing only rotation along the ZY plane. ing. In this case, since the Y-axis actuator 5 is provided along the vertical direction on the side of the Y-axis support column 17 and the expansion / contraction direction is a substantially vertical direction, the Y-axis conversion link 18 is used to expand and contract the Y-axis actuator 5. The motion is converted into the reciprocating motion in the Y-axis direction on the vibration table 2.

  The Y-axis support column 17 stands upright on the gantry 1 like the X-axis support column 12, and a Y-axis conversion constructed by facing a pair of substantially triangular triangular plates 18a and 18b at the upper end as the tip. A link 18 is rotatably attached. Specifically, the Y-axis conversion link 18 is connected to the Y-axis column 17 by hinge-connecting the vicinity of one vertex of the triangular plates 18 a and 18 b to the Y-axis column 17. It is attached in such a manner that only rotation along the ZY plane is allowed. Also, a bracket 5a provided at one end of the Y-axis actuator 5 is hinged to the vicinity of one vertex other than the vertex connected to the Y-axis column 17 of the triangular plates 18a and 18b constituting the Y-axis conversion link 18. When the Y-axis actuator 5 expands and contracts, the Y-axis conversion link 18 rotates along the ZY-axis plane with the portion hinged to the Y-axis column 17 as the center. The bracket 5a is hinged to each of the pair of triangular plates 18a and 18b constituting the Y-axis conversion link 18, and also plays a role of integrating the triangular plates 18a and 18b. When the triangular plates 18a and 18b are integrated, a member for integrating the triangular plates 18a and 18b may be separately provided without using the bracket 5a provided at the end of the Y-axis actuator 5.

  Further, of the vertices of the triangular plates 18 a and 18 b of the Y-axis conversion link 18, the remaining vertices to which neither the Y-axis support column 17 nor the Y-axis actuator 5 is hinged are connected via the Y-axis coupling means 7. 2 connected.

  Between the Y-axis actuator side end 2 b of the vibration table 2 and the Y-axis conversion link 18, Y-axis coupling means 7 is provided. As shown in FIGS. 1 to 3, the Y-axis coupling means 7 is configured so that it cannot rotate around the Y-axis and can rotate along the ZY plane. The Y-axis arm 19 connected to the Y-axis actuator side end 2b of the vibration table 2, the Y-axis guide rail 20 along the Y-axis direction, and the other end of the Y-axis arm 19 rotated along the ZY plane. A pair of Y-axis sliders 21 and 21 that are hinged so as to be slidably attached to the Y-axis guide rail 20 in the X-axis direction are configured.

  In this case, the Y-axis arm 19 includes a pair of arm portions 19a and 19a along the Y-axis direction, and a pair of connecting rods 19b and 19b that connect the arm portions 19a and 19a along the direction orthogonal to the Y-axis direction. The arm portions 19a and 19a and the connecting rods 19b and 19b are shaped just like a cross beam. The shape and structure of the Y-axis arm 19 is not limited to the above, and in this case, the arm portions 19a and 19a and the connecting rods 19b and 19b are formed from a single base material. If there is no problem in strength, the arm portions 19a and 19a and the connecting rods 19b and 19b are separate parts, and the Y-axis arm 19 may be configured by combining them.

  Then, one arm portion 19a of the Y-axis arm 19 is hinged to the vicinity of the remaining vertex where the Y-axis column 17 of the triangular plate 18a of the Y-axis conversion link 18 and the Y-axis actuator 5 are not connected, and the Y-axis The other arm portion 19a of the arm 19 is hinged to the vicinity of the remaining vertex where the Y-axis column 17 and the Y-axis actuator 5 of the triangular plate 18b of the Y-axis conversion link 18 are not connected.

  The Y-axis guide rail 20 is attached to the Y-axis actuator side end 2b of the vibration table 2 along the X-axis direction, and the X-axis that is the longitudinal direction of the Y-axis guide rail 20 on the Y-axis guide rail 20 A pair of Y-axis sliders 21 and 21 and a Y-axis guide rail 20 that are slidably mounted in the direction constitute a linear guide. Although the Y-axis sliders 21 and 21 are not shown in detail, for example, the Y-axis sliders 21 and 21 may have a well-known configuration including a large number of balls that run in grooves provided on the side surface of the Y-axis guide rail 20. If so, a slider of a type that does not include a ball may be used.

  The Y-axis sliders 21 and 21 are hinged to the tips of the arm portions 19a and 19a of the Y-axis arm 19 so that they can rotate along the ZY plane.

  Therefore, the Y-axis coupling means 7 is coupled to the Y-axis conversion link 18 as described above, so that rotation along the ZY plane is allowed while rotation around the Y-axis is prevented. The rotation of the table 2 around the Y axis is restricted. Only one Y-axis slider 21 may be provided as long as it can regulate the rotation of the vibration table 2 around the Y-axis, but one or more Y-axis sliders 21 may be provided around the Y-axis acting on the vibration table 2 by providing two or more. Since the moment can be received by the plurality of Y-axis sliders 21 and 21, the load acting on the Y-axis sliders 21 and 21 can be reduced, and the rotation of the vibration table 2 around the Y-axis can be reliably prevented. It is.

  In addition, since the Y-axis arm 19 in the Y-axis coupling means 7 is coupled to the vibration table 2 via the Y-axis guide rail 20 and the Y-axis sliders 21 and 21 constituting the linear guide, the Y-axis coupling means 7 The vibration table 2 is allowed to move in the X-axis direction. Then, the Y-axis sliders 21 and 21 are allowed to rotate along the ZY plane by the Y-axis arm 19, and the Y-axis arm 19 is allowed to rotate along the ZY plane by the Y-axis conversion link 18. Therefore, when the Y-axis actuator 5 is extended, the Y-axis conversion link 18 rotates at the hinge connection point to the Y-axis column 17 and the Y-axis arm 19 is pushed, so that the vibration table 2 is moved upward in FIG. On the contrary, when the Y-axis actuator 5 is contracted, the Y-axis conversion link 18 rotates at the hinge connection point to the Y-axis column 17 and the Y-axis arm 19 is pulled. The vibration table 2 can be driven downward in FIG.

  That is, in the case of this embodiment, the Y-axis conversion link 18 and the Y-axis support column 17 constitute a bell crank mechanism, and the expansion / contraction movement along the substantially vertical direction of the Y-axis actuator 5 is converted into the movement in the Y-axis direction. The vibration table 2 can be transmitted. The Y-axis conversion link 18 is composed of triangular triangular plates 18a and 18b because it is advantageous in terms of strength. As described above, the expansion and contraction movement of the Y-axis actuator 5 is applied to the vibration table 2. Since the movement in the Y-axis direction is sufficient, the shape may be other than a triangular shape such as an L shape.

  Furthermore, in this case, the Y-axis conversion link 18 plays a role of restricting the rotation of the Y-axis arm 19 around the Y-axis, thereby restricting the rotation of the vibration table 2 around the Y-axis. For example, the Y-axis actuator 5 is installed at the upper end of the Y-axis column 17 so that the expansion / contraction direction is the Y-axis direction, and the Y-axis arm 19 is the Y-axis column. When the Y-axis actuator 5 is attached to the Y-axis actuator 5 so that the rotation along the ZY plane and the movement in the Y-axis direction are allowed while the rotation about the Y-axis is restricted at the upper end, the Y-axis conversion link 18 is It becomes unnecessary.

  The Y-axis guide rail 20 is connected to the Y-axis actuator side end 2b of the vibration table 2, and the Y-axis sliders 21 and 21 are connected to the Y-axis arm 19 side. The Y-axis sliders 21, 21 may be connected to the vibration table 2 by being connected to the arm 19, and at least one of the Y-axis guide rail 20 and the Y-axis slider 21 is applied to the Y-axis arm 19. What is necessary is just to connect to the swing table 2 rotatably along a ZY plane.

  Since the vibration test unit U is configured as described above, the vibration table 2 is prevented from rotating around the X axis by the X axis connecting means 6 and from being rotated around the Y axis by the Y axis connecting means 7. Therefore, the vibration table 2 is always kept in a horizontal state. Further, since the X-axis coupling means 6 does not prevent the movement of the vibration table 2 in the Y-axis direction, the Y-axis actuator 5 does not prevent the vibration table 2 from being driven in the Y-axis direction. Since the connecting means 7 does not hinder the movement of the vibration table 2 in the X-axis direction, the driving of the vibration table 2 in the X-axis direction by the X-axis actuator 4 is not hindered, and the vibration table 2 is kept horizontal. It is possible to drive the vibration table 2 freely in the X-axis direction and the Y-axis direction as it is. Thus, since the vibration table 2 is supported by the X-axis coupling means 6 and the Y-axis coupling means 7 in a horizontal state and supported in a horizontal state, the weight borne by the Z-axis actuator 3 is the vibration in the conventional vibration test unit. Since it is lighter than the table and the parts attached to it, the output of the Z-axis actuator 3 can be reduced, the drive source of the Z-axis actuator 3 can be reduced in size, the cost is reduced, and the energy consumption Can be reduced, and the economy is excellent.

  The Z-axis actuator 3 is connected to the vibration table 2 via a table-side spherical bearing 8 and is connected to the gantry 1 via a gantry-side spherical bearing 9. By doing so, the Z-axis actuator 3 can swing and rotate with respect to the gantry 1 and the oscillating table 2. The movement in the X-axis direction and the Y-axis direction can be allowed while maintaining, and the vibration in the Z-axis direction can be given to the vibration table 2 by expanding and contracting. Therefore, in the vibration test unit U of this embodiment, only the table-side spherical bearing 8 is interposed between the Z-axis actuator 3 and the vibration table 2. A guide mechanism that receives a moment around the Z-axis and makes the expansion / contraction direction of the Z-axis actuator 3 only in the vertical direction, an intermediate table for allowing the vibration table 2 to move in the X-axis direction and the Y-axis direction, and a plurality of Since there is no need to install a 2-axis orthogonal linear motion bearing, the weight of the vibration table 2 including parts attached to it can be further reduced, and the Z-axis actuator 3 and the drive source can be more effectively downsized. The energy consumption can be reduced more effectively, and the economics of the vibration test unit U can be dramatically improved.

  Further, when both the table-side spherical bearing 8 and the gantry-side spherical bearing 9 are hydrostatic spherical bearings, the vibration test unit U can withstand long-term use because of excellent wear resistance.

  The X-axis coupling means 6 includes an X-axis arm 14 whose one end is coupled to one end of the X-axis actuator 4 in such a manner that it cannot rotate around the X-axis and can rotate along the ZX plane, and the X-axis arm 14 and the vibration table 2 is slidable in the Y-axis direction to the other of the X-axis actuator side end 2 a of the X-axis arm 14 and the vibration table 2. The X-axis guide rail 15 or the X-axis sliders 16 and 16 can be rotated along the ZX plane, and the Y-axis coupling means 7 rotates around the Y-axis. One of the Y-axis arm 19 whose one end is connected to one end of the Y-axis actuator 5 in a manner that cannot be rotated along the ZY plane, and the Y-axis actuator side end 2b of the Y-axis arm 19 and the vibration table 2 Provided on the other side of the Y-axis guide rail 20 along the X-axis direction, the Y-axis arm 19 and the Y-axis actuator side end 2b of the vibration table 2, and is slidably attached to the guide rail 10 in the X-axis direction. Y-axis sliders 21, 21, and the Y-axis guide rail 20 or the Y-axis sliders 21, 21 can be rotated along the ZY plane, so that the X-axis coupling means 6 and the Y-axis coupling means 7 can be easily and lightweight. It can be realized with a component configuration.

  Further, the X-axis connecting means 6 includes at least two X-axis sliders 16 and 16, and the Y-axis connecting means 7 includes at least two Y-axis sliders 21 and 21, thereby acting on the vibration table 2. Since the X-axis sliders 16 and 16 and the Y-axis sliders 21 and 21 can receive moments around the X-axis and the Y-axis, the load acting on the X-axis sliders 16 and 16 and the Y-axis sliders 21 and 21 is increased. In addition to being reduced, it is possible to reliably prevent rotation of the vibration table 2 around the X axis and the Y axis.

  As described above, the vibration test unit U is configured and installed on the base B on which the four vibration test units U are mounted to form the vibration test apparatus T.

  In this case, as shown in FIG. 1, the vibration tables 2 of the two vibration test units U are arranged side by side in the horizontal horizontal direction that coincides with the horizontal direction in FIG. The vibration tables 2 of the two vibration test units U are arranged side by side in the X-axis direction parallel to this and on the other same line, and further, when viewed from the Y-axis direction, the two vibration test units U are on the same line. The vibration table 2 is arranged side by side, and the vibration table 2 of the two vibration test units U is arranged side by side in the Y-axis direction parallel to the other.

  Therefore, two vibration tables 2 of each vibration test unit U are arranged side by side in both the X-axis direction and the Y-axis direction. In FIG. 1, the vibration test apparatus T is viewed from above, and the direction penetrating the paper surface is the vertical direction. Therefore, the horizontal direction and the vertical direction in FIG. 1 are horizontal directions of the vibration test apparatus T.

  In addition, depending on the attachment part of the test body to which the vibration table 2 is attached, there is not necessarily a relationship in which the two vibration tables 2 are arranged on the same line. It can also be placed at the apex of a parallelogram. Further, the number of vibration test units U provided in the vibration test apparatus T may be set arbitrarily as long as it is suitable for a test body that applies vibration.

  In this vibration test apparatus T, the gantry 1 of each vibration test unit U is mounted on a base B, and the gantry 1 of two vibration test units U and U arranged in the X-axis direction is The remaining two vibration test units U and U are attached to a movable base 30 attached to the base B so as to be movable in the Y-axis direction. The movable base 31 attached so as to be movable in the Y-axis direction is attached so as to be movable in the X-axis direction, and each base 1 is movable in the XY-axis direction with respect to the base B. Therefore, by moving the gantry 1 to an arbitrary position on the base B, the position of the vibration table 2 can be positioned at a position suitable for the specimen.

  Each X-axis actuator 4 that drives each vibration table 2 in the X-axis direction, which is the same direction, is all on one side of both sides in the X-axis direction, which is the driving direction of the X-axis column 12, that is, in FIG. Is arranged on the right side of the X-axis column 12. Each X-axis actuator 4 may be arranged on the left side in FIG. 1 on the opposite side of the X-axis column 12 in the driving direction.

  Furthermore, each Y-axis actuator 5 that drives each vibration table 2 in the Y-axis direction, which is the same direction, is all one side of both sides in the Y-axis direction, which is the drive direction of the Y-axis column 17, that is, in FIG. Is arranged on the upper side of the Y-axis column 17. Each Y-axis actuator 5 may be arranged on the lower side in FIG. 1 on the opposite side of the Y-axis column 17 in the driving direction.

  The specifications of the X-axis actuator 4 in each vibration test unit U are the same, and the length of the X-axis arm 14 and the expansion / contraction motion of the X-axis actuator 4 of the X-axis conversion link 13 are set to the X-axis of the vibration table 2. The lever ratio when converting to the reciprocating motion in the direction is the same, and when the stroke position of the X-axis actuator 4 is at the same position, consideration is given so that the relative position in the X-axis direction of each vibration table 2 does not change. ing. The specifications of the Y-axis actuator 5 in each vibration test unit U are the same, and the length of the Y-axis arm 19 and the expansion / contraction motion of the Y-axis actuator 5 of the Y-axis conversion link 18 are determined in the Y-axis direction of the vibration table 2. The lever ratio when converting to the reciprocating motion is equal, and when the stroke position of each Y-axis actuator 5 is at the same position, consideration is given so that the relative position in the Y-axis direction of each vibration table 2 does not change. ing. Therefore, even if the X-axis actuator 4 and the Y-axis actuator 5 are turned off and are in the most extended or contracted state, the relative positions of the vibration table 2 in the X-axis direction and the Y-axis direction do not change. The Z-axis actuators 3 are all the same. Therefore, even if all of the Z-axis actuator 3, the X-axis actuator 4, and the Y-axis actuator 5 are turned off to be in the most contracted state, all the vibration tables 2 are relative to each other in the Z-axis direction, X-axis direction, and Y-axis direction. The position does not change, the specimen can be moved to the lowermost position with no load, and there is no fear that the specimen will be damaged by applying a load to the specimen.

  Further, in the case of the vibration test apparatus T, all the X-axis actuators 4 and the Y-axis actuators 5 are arranged outside the respective vibration tables 2, that is, from a rectangular range surrounded by the respective vibration tables 2. Are also arranged outside, so that the X-axis actuator 4 and the Y-axis actuator 5 do not get in the way when the gantry 1 is moved to reduce the distance between the vibration tables 2, and a small specimen A vibration test can be performed, and the connection between the X-axis actuator 4 and the Y-axis actuator 5 and devices necessary for driving them, and the installation of piping and the like are facilitated.

  Subsequently, the operation of the vibration test apparatus T will be described. First, when the vibration table 2 is moved synchronously in the left direction in FIG. 1, each X-axis actuator 4 is disposed on the right side in FIG. The X-axis actuators 4 need only be stroked to the extension side by the same amount. Conversely, when the vibration table 2 is moved in the right direction in FIG. 1, the X-axis actuators 4 are contracted by the same amount. Stroke to the side.

  Furthermore, when it is desired to change the interval in the X-axis direction of each vibration table 2, it is only necessary to change the stroke amount of each X-axis actuator 4. By controlling the stroke amount of each X-axis actuator 4, a load is applied to the specimen. Can act.

  When the vibration table 2 is moved in synchronization in the upward direction in FIG. 1, each Y-axis actuator 5 is disposed on the upper side in FIG. The Y-axis actuator 5 may be stroked to the contraction side by the same amount. Conversely, when the vibration table 2 is moved in the downward direction in FIG. 1, each Y-axis actuator 5 is moved to the expansion side by the same amount. Just make a stroke.

  Further, when it is desired to change the interval in the Y-axis direction of each vibration table 2, the stroke amount of each Y-axis actuator 5 may be changed, and the load on the specimen is controlled by controlling the stroke amount of each Y-axis actuator 5. Can act.

  When each vertical actuator Z is expanded and contracted in the vertical direction and the vibration table 2 is driven in the vertical direction, the vibration table 2 is expanded and contracted in synchronization with the X-axis actuator 4 and the Y-axis actuator 5. The vibration table 2 can be moved up and down while being in a no-load state with respect to the direction and the Y-axis direction.

  By controlling the displacement of the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3 in this way, it is possible to apply only vibration without applying a load to the specimen, or to apply a load to the specimen. You can also

  Therefore, according to the vibration test apparatus T, it is not necessary to monitor the load acting on the X-axis arms 14 and 19 and feed back the load, and the X-axis actuator 4 and the Y-axis actuator 5 are not required. Therefore, since it is sufficient to control the displacement, it is not necessary to switch the control from displacement control to load control to bumpless, and it is easy to control, and it is not necessary to install a load cell or a strain sensor, which is advantageous in terms of cost.

  Further, when the hydraulic pressures of the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3 are all turned off and the X-axis actuator 4, the Y-axis actuator 5 and the Z-axis actuator 3 are in the most contracted state, Since the axis actuators 4 and the Y-axis actuators 5 do not push or pull each other, the attaching / detaching operation of the test specimen can be performed safely. Even if the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3 are all turned off due to the failure, the X-axis actuators 4 and the Y-axis actuators 5 do not interfere with each other's movements, so Can be moved quickly. Furthermore, after attaching the test body to the vibration table 2, the vibration table 2 is moved to the vibration neutral point. That is, all of the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3 are stroked to the stroke center. Even in such a case, it is sufficient to control the displacement of the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3.

  In addition, although the vibration test apparatus T described above includes four vibration tables 2, for example, two vibration tables 2 may be driven. Also in this case, each X-axis actuator 4 is arranged on one side of both sides of the X-axis column 12 in the X-axis direction, and each Y-axis actuator 5 is arranged on one side of both sides of the Y-axis column 17 in the Y-axis direction. By arranging the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3 by controlling the displacement, it is possible to apply only vibration without applying a load to the test body, or to apply a load to the test body. It can also act.

  In addition, as described above, the X-axis actuator 4, the Y-axis actuator 5, and the Z-axis actuator 3 are all telescopic hydraulic servo cylinders. However, the fluid pressure using a fluid other than the electric cylinder and hydraulic oil is used. It may be a cylinder.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

DESCRIPTION OF SYMBOLS 1 Base 2 Excitation table 3 Z-axis actuator 4 X-axis actuator 5 Y-axis actuator 6 X-axis connection means 7 Y-axis connection means 8 Table-side spherical bearing 9 Base-side spherical bearing 12 X-axis support 13 X-axis conversion link 14 X-axis Arm 15 X-axis guide rail 16 X-axis slider 17 Y-axis support 18 Y-axis conversion link 19 Y-axis arm 20 Y-axis guide rail 21 Y-axis slider T Vibration test apparatus U Vibration test unit

Claims (7)

A vibration table that inputs vibration to the test body, a Z-axis actuator that is mounted on a frame and drives the vibration table in the vertical direction, and a vibration table that is mounted on the frame and drives the vibration table in the horizontal and X-axis direction A vibration test unit comprising: an X-axis actuator, and a Y-axis actuator mounted on the gantry and driving the excitation table in a Y-axis direction that is horizontal and orthogonal to the X-axis direction, An X-axis coupling means provided between the X-axis actuator and allowing movement of the vibration table in the Y-axis direction and restricting rotation around the X-axis; the vibration table; and the Y-axis actuator; A vibration test unit comprising Y-axis coupling means provided between the Y-axis and the Y-axis coupling means for allowing movement of the vibration table in the X-axis direction and restricting rotation about the Y-axis. Tsu door. One end of the Z-axis actuator and the gantry are connected via a gantry-side spherical bearing, and the other end of the Z-axis actuator and the vibration table are connected via a table-side spherical bearing. Item 2. The vibration test unit according to Item 1. The vibration test unit according to claim 2, wherein both the gantry side spherical bearing and the table side spherical bearing are hydrostatic spherical bearings. The X-axis coupling means includes an X-axis arm whose one end is coupled to one end of the X-axis actuator in a manner incapable of rotating around the X-axis and rotatable along the ZX plane, the other end of the X-axis arm, and the An X-axis guide rail along the Y-axis direction provided at one of the X-axis actuator side ends of the vibration table, the other end of the X-axis arm, and the other end of the vibration table on the X-axis actuator side. An X-axis slider attached to the X-axis guide rail so as to be slidable in the Y-axis direction. The X-axis guide rail or the X-axis slider is rotatable along the ZX plane. A Y-axis arm whose one end is connected to one end of the Y-axis actuator in such a manner that it cannot rotate around the Y-axis and can rotate along the ZY plane, the other end of the Y-axis arm, and the Y-axis of the vibration table Acti A Y-axis guide rail along the X-axis direction provided at one of the eta side ends, the other end of the Y-axis arm, and the other end of the Y-axis actuator side end of the vibration table. A Y-axis slider attached to be freely slidable in the X-axis direction, and the Y-axis guide rail or the Y-axis slider is rotatable along the ZY plane. The vibration test unit according to claim 1. 5. The vibration test unit according to claim 4, wherein the X-axis coupling means includes at least two X-axis sliders, and the Y-axis coupling means includes at least two Y-axis sliders. . A vibration test apparatus comprising a plurality of vibration test units according to any one of claims 1 to 5, wherein each vibration test unit includes an X-axis column, an X-axis column, and an X-axis that stand on the gantry. A reciprocating motion of the X-axis actuator is converted into a reciprocating motion in the X-axis direction of the vibration table by being rotatably attached to the other end of the actuator and the X-axis coupling means along the ZX plane. An X-axis conversion link, a Y-axis column that stands on the gantry, the Y-axis column, the other end of the Y-axis actuator, and the Y-axis coupling means are attached to be rotatable along the ZY plane. And a Y-axis conversion link for converting the reciprocating motion of the Y-axis actuator into a reciprocating motion of the vibration table in the Y-axis direction, and each X-axis actuator has one end relative to the gantry. The Y-axis actuator is rotatably mounted along the X plane and is disposed on either side of the X-axis column in the driving direction. One end of each Y-axis actuator is along the ZY plane with respect to the gantry. A vibration test apparatus, wherein the vibration test apparatus is rotatably mounted and disposed on either side of both sides of the Y-axis support in the driving direction. 7. The vibration test apparatus according to claim 6, wherein the lever ratio of the conversion link is made equal.

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