JP2006064404A - Excitation testing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excitation testing apparatus of a simple constitution simultaneously linearly and rotatively moving an object to be excited by adding a rotation driving means to one excitation machine as a base. <P>SOLUTION: The excitation testing apparatus is provided with an excitation table 1 for linear motion, a mounting base 5 for the object to be excited rotatably supported at the excitation table 1, and the rotation driving means for providing rotative motion for the mounting base 5 synchronously with the liner motion of the excitation table 1. The rotation driving means is constituted of a motor 4 and a control unit 6 or a motion converting means for converting linear motion of the exciting table into rotative motion of the mounting base. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an excitation test apparatus.

  When evaluating a sensor that detects the rollover of a vehicle, a test apparatus that simultaneously applies linear acceleration (linear acceleration) and angular acceleration (rotational speed) is necessary. Conventionally, in order to evaluate such a sensor, there is no compact and simple test apparatus that can generate linear motion and rotational motion simultaneously. On the other hand, by combining a single vibration table and a plurality of vibration generators as a vibration testing device for structures, etc., the vibration table is vibrated with a phase difference and a stroke difference with these vibration generators. A technique for simultaneously performing a linear motion and a rotation direction is disclosed (for example, see Patent Documents 1 and 2).

JP-A-5-93671 Re-special table WO 98/41835

Conventional vibration test apparatuses use a plurality of shakers, so the scale of the apparatus tends to be large, the configuration tends to be complicated and expensive, and the limit of the rotation angle is limited by the stroke of the shaker. There was a problem.
The present invention has been made to solve the above-described problems. By adding a rotation driving means based on a single vibration exciter, it is possible to simultaneously and linearly rotate a vibration object. An object of the present invention is to provide a vibration testing apparatus with a simple configuration.

  The vibration testing apparatus according to the present invention includes a vibration table that performs linear motion, a mounting table that is pivotally supported by the vibration table, and on which a vibration target is placed, and is synchronized with the linear motion of the vibration table. Rotation driving means for applying a rotational motion to the mounting table is provided.

  According to the present invention, it is possible to obtain a vibration test apparatus having a simple configuration capable of simultaneously applying a linear motion and a rotational motion to a vibration target object by adding a rotation driving means to one vibration device. it can.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described.
In FIG. 1, a vibration table 1 that performs linear motion is configured as a member of a vibration device 2, and is supported by the vibration device 2 by a rod 3 in a cantilever structure. The rod 3 can be linearly moved with a stroke of about several tens of centimeters by using, for example, magnetic force generated by the vibration table driving means inside the vibration device 2.
The motor 4 is mounted and fixed on the vibration table 2 such that the axis of the rotation axis intersects the moving direction of the vibration table. Furthermore, the mounting table 5 for the object to be vibrated was fixed to the rotating shaft 4 a of the motor 4. The mounting table 5 is rotatably supported by the vibration table via the motor 4, and the movement of the mounting table 5 and the movement of the vibration table 1 are combined to the vibration object S on the mounting table 5. Will work.

  The mounting table 5 is a table for mounting and fixing an object to be vibrated. For example, an airbag-compatible ECU (electronic control device) is fixed as the vibration object S on the mounting table 5, and the motor 4 is activated simultaneously with the activation of the vibration device 2 by the control device 6. Then, a linear motion of the vibration table 1 and a rotational motion of the mounting table 5 are given to the vibration object S. The vibration table 1 is suddenly stopped at a predetermined stroke, but until then, the mounting table 5 and the vibration object S are simultaneously subjected to rotation and linear motion. This is a simulation of the movement that is received, and simulation can be realized with a small and simple device.

  In order to enhance the results of the simulation, the control device 6 controls the timing of stopping the motor 4 to match the timing of starting the vibration device 2 and the timing of starting the motor 4 as in actual rollover. Accordingly, the start timing t1 of the vibration device 2 shown in FIG. 2A and the start timing t1 of the motor 4 shown in FIG. 2B are combined, and the angular acceleration characteristic as shown in FIG. Can be obtained.

  Further, the control device 6 controls the vibration table driving means configured in the vibration device 2 so as to change the stroke and linear acceleration in addition to the start timing of the vibration table 1 so as to perform linear motion. It can also be configured. In addition to the start timing of the motor 4, the control device 6 can control the angular acceleration to be changed to ω1, ω2, and ω3 in FIG. . A desired test can be performed by inputting test condition data such as the magnitude and timing of acceleration to be applied to the vibration object S to the control device 6.

The motor 4 and the control device 6 constitute an example of a rotation drive unit that gives a rotational movement to the mounting table 5 in synchronization with the linear movement of the vibration table 1, and a motor as a rotation drive source separately from the vibration device 2. And the motor is mounted on the vibration table 1. With such a simple configuration, a small-scale vibration testing machine can be easily realized. Moreover, since the mounting table 5 is motor-driven, the limit of the rotation angle is not limited by the stroke of the shaker.
In the vibration device 2, the rod 3 has a structure that supports the vibration table 1 in a cantilevered manner, so that the weight of the motor 4 may become an excessive load. In such a case, the lower surface of the vibration table 1 can be supported by the rotating roller 7.

Embodiment 2. FIG.
Embodiment 2 of the present invention will be described.
In this embodiment, in FIGS. 3 and 4, the shaft 8 is pivotally supported on the vibration table 1 via a bearing 8 a so that the axis intersects the moving direction of the vibration table. The shaft 8 is integrally provided with a pulley 9 and a rotating disk 10. As shown in FIG. 4, the shaft 8 is cantilevered by the vibration table 1 to support the pulley 9, the rotating disk 10, and the like, and the mounting table 11 is fixed to the side surface of the rotating disk 10. In this way, the mounting table 11 is rotatably supported by the vibration table 1 via the rotating disk 10, the pulley 9, and the shaft 8. Thereby, the motion of the mounting table 11 and the motion of the vibration table 1 are combined and act on the vibration target on the mounting table 11.

  By placing the mounting table 11 in the vicinity of the rotation axis of the rotating disk 10, the mounting area could be increased. On the other hand, since the mounting table 11 is located on the extension of the shaft 8, it must be a cantilever structure. Although the area of the mounting table 11 is sacrificed for the dual-support structure, the installation position may be an arrangement that is moved slightly above the axis of the rotating disk 10.

  In the second embodiment, the motor 12 is installed on a stationary member separate from the vibration table 2. Further, the pulley 13 is integrated with the rotating shaft of the motor 12. Then, a belt 14 was wound around the pulley 9 and the pulley 13. In addition, a stay 15 is projected from the vibration table 2 and a tension roller 17 is provided via an extensible spring 16 so as to absorb the slack of the belt 14 while maintaining a constant tension of the belt 14. .

Here, even if the pulley 9 moves together with the vibration table 1, the tension roller 17 has a function of absorbing the slack of the belt 14 and maintaining the tension within the moving stroke.
An ECU corresponding to an air bag is fixed as the vibration object S on the mounting table 11, and the motor 12 is activated simultaneously with the activation of the vibration device 2. Then, since the rotation of the motor 12 is transmitted to the mounting table 11 via the belt 14, the linear motion of the vibration table 1 and the rotational motion of the mounting table 11 are combined and given to the vibration target S. Thus, similar to the first embodiment, the simulation can be realized with a small and simple device.

  In order to enhance the results of the simulation, also in the second embodiment, the control device 17 matches the start timing of the vibration drive means 2a of the vibration device 2 with the start timing of the motor 12, and the motor 12 is stopped. Control timing. The control device 6 performs the same control as the control device 2. That is, a desired test can be performed by inputting test condition data such as the magnitude and timing of acceleration to be applied to the vibration target S to the control device 6.

  In the second embodiment, the motor 12 and the control device 17 constitute an example of a rotation driving unit that applies a rotational motion to the mounting table 11 in synchronization with the linear motion of the vibration table 1, and are separate from the vibration device 2. Is characterized in that it is provided with a motor as a rotational drive source, and this motor is installed outside the vibration table 1. Compared to the first embodiment, the burden on the support structure for supporting the rod 3 is reduced in that a heavy motor does not ride on the vibration table 1. In addition, since the motor is driven, the limit of the rotation angle is not limited by the stroke of the shaker.

Embodiment 3 FIG.
Each of the following embodiments is characterized in that the rotation driving means for applying a rotational motion to the mounting table includes a motion conversion means using the motion of the vibration table.
A third embodiment of the present invention will be described with reference to FIGS.
An opening 18 is formed in the central portion of the vibration table 1 having a rectangular plate shape. A shaft 19 is pivotally supported on the vibration table 1 via a bearing 20 in a direction (lateral direction in FIG. 7) that is a side wall of the opening 18 and orthogonal to the moving direction of the vibration table 1. A gear 21 </ b> G is provided integrally with the shaft 19 at the other end of the shaft 19. A mounting table 22 is fixed to the side surface of the gear 21G. An excitation object S is fixed to the mounting table 22.

  Below the gear 21G, a rack 23L provided on the immovable member is provided so as to be able to mesh with the gear 21G. As described above, the gear 21G rotatably supported by the vibration table 1 and meshed with the rack 23L and integrally formed with the mounting table 22 constitutes a motion conversion means together with the rack 23L, and linear motion of the vibration table 1 is achieved. Is a main member of the motion converting means for changing the rotation to the rotational motion of the mounting table 22.

As the vibration table 1 moves, the gear 21G meshes with the rack 23L and rotates, so that the mounting table 22 and the vibration target S on the mounting table 22 are simultaneously subjected to rotational motion and linear motion.
The rack 23L is provided in accordance with the stroke of the vibration table 1. For example, if the vibration table 1 is started from the meshed state with the rack 23L, the start timing of the linear motion and the start timing of the rotational motion coincide with each other, as shown in FIGS. Further, by setting the end portion of the rack 23L slightly before the stroke end of the vibration table 1, the rotational motion stops after the linear motion is stopped as shown in FIGS. 2 (a) and 2 (b). Various simulations, such as such a relationship, are possible.

Embodiment 4 FIG.
Embodiment 4 of the present invention will be described.
In the third embodiment, since there is only one gear 21G, only one type of rotational angular velocity determined by the gear 21G can be obtained. Therefore, in this embodiment, a combination of a rack and a gear pair is arbitrarily selected and used for each gear having a different number of teeth so that a plurality of rotational angular velocities can be given to the object to be excited. A gear attaching / detaching means is provided. An example of the gear attaching / detaching means will be described below with reference to FIGS.

  In FIG. 8, a rectangular opening 24 is formed at the center of a vibration plate 1 having a rectangular plate shape. The vibration table 1 is detachable from the disassembly member 1a so that the opening 24 can be freely opened, and is fastened and fixed by bolts 32 and 33. A shaft 25 is pivotally supported on the vibration table 1 via a bearing 27 in a direction perpendicular to the moving direction of the vibration table 1 (left and right direction in FIG. 9). On the other end side of the shaft 19, a mounting table 26 is provided integrally with the shaft 19. The shaft 19 extends through the mounting table 26, and an external thread 19a is formed on the end side. The shaft end portion is a small diameter portion 19b.

  The gear 28G and the spacer 29 are attached to the shaft 19 in a state where the bolts 32 and 33 are loosened in advance and the disassembling member 1a is removed from the shaft 19. The shaft 19 has a D shape for preventing rotation of the gear 28G and the spacer 29 attached thereto. A gear 28G is mounted on the shaft 19 in close contact with the mounting table 26, and further, after two spacers 29 are mounted, the male screw 19a is screwed into the nut 30 and tightened. Thus, the gear 28G is fixed so as to rotate integrally with the shaft 19 and the mounting table 26. Further, the small diameter portion 19 b is fitted to a bearing 31 provided on the disassembly member 1 a, and the disassembly member 1 a is fixed to the vibration table 1 by bolts 32 and 33.

  When the assembled state is viewed from the moving direction of the vibration table 1 indicated by the arrow, as shown in FIG. 9, a gear 28G is provided so as to contact the mounting table 28G, and two spacers are adjacent to this. 29 is provided. The shaft 19 may have an arrangement in which another gear having a different number of teeth from the gear 28G is mounted. For example, as shown in FIG. 10, an arrangement in which a gear 34G is interposed between two spacers 29, such as a spacer 29, a gear 34G, and a spacer 29 from the side closer to the mounting table 26, or as shown in FIG. The arrangement of the two spacers 29 and the gear 35G adjacent to the two spacers 29 from the side closer to the mounting table 26 is possible.

  Here, there is a relationship in which the number of teeth decreases in the order of the gear 28G, the gear 34G, and the gear 35G. 8 and 9, a stepped step of a rack mounting member 36 made of a stationary member is formed above the vibration table 1, and the rack 28 </ b> L, in order from the side closer to the mounting table 26, As will be described later, 34L and 35L are fixed at positions where they can mesh with each pair of gears. As shown in the cross section of the rack 35L, the fixing means is fixed using embedded screws 37. The same applies to the racks 28L and 34L.

  On the shaft 19, in the arrangement of the gear 28G and the spacer 29 shown in FIG. 8, the gear 28G and the rack 28L mesh with each other as shown in FIGS. In the arrangement of the gear 34G and the spacer 29 shown in FIG. 10, the gear 34G and the rack 34L mesh with each other as shown in FIG. In the arrangement of the gear 35G and the spacer 29 shown in FIG. 11, the gear 35G and the rack 35L mesh with each other as shown in FIG. The reason why the spacers are provided is to ensure that only one gear and one rack are engaged with each other in a configuration in which all the racks are fixed in advance.

  As described above, the opening 24 can be opened with the disassembling member 1a, and the gears 28G, 34G, 35G, the spacer 29 and the like can be changed by the mounting table 26 and the shaft 19 to be detachable. The straight line of the first-speed vibration table 1 can be obtained by changing the gear arrangement while the racks 28L, 34L, 35L constituting the gear attaching / detaching means are fixed to the rack attaching member 36. A plurality of rotational angular velocities can be obtained corresponding to the moving speed, and a plurality of combinations of angular accelerations and linear accelerations can be obtained.

Embodiment 5. FIG.
Embodiment 5 of the present invention will be described.
This is a modification of the above-described fourth embodiment. In the fourth embodiment, a plurality of gears having different numbers of teeth can be attached to and detached from the vibration table while a plurality of racks are fixed. On the other hand, in the present embodiment, while the arrangement of a plurality of gears having different numbers of teeth is fixed, the rack paired with these gears can be attached to and detached from the stationary member, and the rack and the gear are paired. A plurality of combinations are provided for each gear having a different number of teeth, and rack attaching / detaching means that can be arbitrarily selected and used is provided to give a plurality of rotational angular velocities to the object to be excited.

  An example of the rack attaching / detaching means will be described below with reference to FIGS. As shown in FIG. 15, the same vibration table 1, disassembling member 1 a, shaft 19, nut 30, etc. can be used as in the fourth embodiment. The same applies to the gears 28G, 34G, and 35G. However, the spacer 29 is not used. Further, as in the fourth embodiment, once the gear is attached and detached, it is not necessary. The gears 28G, 34G, and 35G are integrally attached to the shaft 19 in this order from the mounting table 26, and tightened with the nut 30 to assemble the disassembly member 1a.

  When the assembled state is viewed from the moving direction of the vibration table 1 indicated by the arrow, as shown in FIG. 16, a gear 28G is provided so as to be in contact with the mounting table 26, and adjacent to this, the gear 34G, 35G is arranged. At positions facing the gears 28G, 34G, and 35G, mounting portions that allow the racks 28L, 34L, and 35L to be attached to and detached from the rack mounting member 36 are provided in a staircase shape, and mounting female screws for the screws 37 are provided. Is formed. Only the rack corresponding to the gear used for the vibration test is mounted on the immovable member 36 by using the mounting portion, the female screw, and the screw 37. In the example shown in FIG. 16, only the rack 35L that is paired with the gear 35G is mounted. This state corresponds to the combination shown in FIG.

  When the gear 34G is used, a rack 34L paired with the gear 34G is mounted, and all racks other than the rack 34L are removed. This state corresponds to the combination shown in FIG. Similarly, when the gear 28G is used, the rack 28G paired with the gear 28G is mounted, and all the racks other than the rack 28LL are removed. This state corresponds to the combination shown in FIG.

As described above, when different rotational speeds are obtained, the rack is attached and detached by removing other racks so that only the rack paired with the corresponding gear can be attached to the rack attachment member 36. Otherwise, the device will be damaged by simultaneous meshing. The rack mounting portion 36 configured in a step shape and the screw 37 constitute a main member of the rack attaching / detaching means.
With each gear 28G, 34G, 35G mounted on the shaft 19, by mounting any of the racks 28L, 34L, 35L corresponding to the gear to be used, the straight line of the first-speed vibration table 1 A plurality of rotational angular velocities can be obtained corresponding to the moving speed, and a plurality of combinations of angular accelerations and linear accelerations can be obtained.

Embodiment 6 FIG.
Embodiment 6 of the present invention will be described. In Embodiments 4 and 5 described above, in order to obtain a plurality of rotational angular velocities corresponding to the linear movement speed of the first-speed vibration table 1, it is necessary to attach and detach gears or racks. In the present embodiment, it is possible to obtain a plurality of rotational angular velocities without performing a gear or rack attachment / detachment operation.

In the present embodiment, the motion conversion means for changing the linear motion of the vibration table to the rotational motion of the mounting table is constituted by a planetary gear device that makes the linear motion of the acceleration table variable to rotational motion of different angular velocities.
In FIG. 18, this planetary gear device 39 is a gear that meshes with a sun gear 40G that is rotatably supported by a vibration table 1 via a shaft 46 and a bearing 47 and that is positioned at the center, and a rack 41L that is provided on a stationary member. A ring gear 42G positioned on the outermost side of the planetary gear device, and a pinion gear 44G rotatably supported by the planetary carrier 43 and meshing with the sun gear 40G and the ring gear 42G in common. Although not shown, a brake function for braking the rotation of the planetary carrier 43 is provided. As shown in FIG. 17, the sun gear 40G is provided with a mounting table 45 for mounting a vibration object. The braking level of the brake function can be controlled by the control means.

  In this configuration, when the vibration table 1 is vibrated in the linear direction by the rod 3, the vibration object S mounted on the mounting table 45 is attached to the vibration table 1 via the planetary gear device 39. Simultaneously with the acceleration in the linear direction, the ring gear 42G is rotated by meshing with the rack 41L, the rotation is transmitted to the sun gear 40G through the pinion gear 44G at a predetermined reduction ratio, and is rotated to the vibration object S attached to the sun gear 40G. Exercise is given.

  Here, by controlling the rotation speed of the planetary carrier by the brake function, the rotation speed of the sun gear 40G can be adjusted, and a desired rotation speed and a change in the rotation speed are given to the vibration target S. It is possible to obtain multiple rotational angular velocities.

Embodiment 7 FIG.
Embodiment 7 of the present invention will be described.
In the present embodiment, the motion conversion means for changing the linear motion of the vibration table into the rotational motion of the mounting table is configured as shown in FIG. That is, the crankshaft 48 pivotally supported on the vibration table 1, the mounting table 49 that rotates together with the crankshaft 48, and one end portion pivotally attached to the crank portion of the crankshaft 48, while the other end portion is immovable. A link 51 pivotally attached to the member 50 is provided.

  The configuration of the invention in this embodiment is an application of a well-known crank mechanism, which utilizes the linear motion of the vibration table 1 and the crankshaft 48 rotates in conjunction with the linear motion of the vibration table 1. Can be rotated.

Embodiment 8 FIG.
Embodiment 8 of the present invention will be described.
In the present embodiment, as shown in FIG. 20, a pair of pulleys 51 and 52 that are pivotally supported on the vibration table 1 are used as the motion conversion means that converts the linear motion of the vibration table into the rotational movement of the mounting table. A mounting base 53 provided on a disk provided coaxially with one pulley 51 of these two pulleys and rotating together with the pulley 51, a belt 54 wound around a pair of pulleys 51, 52, and the belt 54 The fixing member 55 is provided as means for fixing a part of the fixed member to the stationary member.
In this mechanism, along with the linear motion of the vibration table 1, the belt 54 partially fixed to the immovable member can rotate the pulleys 51 and 52, and can rotate the mounting table 53.

It is a schematic block diagram of the vibration test apparatus of the structure driven by the motor which has arrange | positioned the mounting base on the vibration table. 2A is a characteristic diagram of linear acceleration, and FIG. 2B is a characteristic diagram of angular acceleration. It is a waist part front view of the vibration test apparatus of the structure driven by the motor which has arrange | positioned the mounting base out of the vibration table. FIG. 4 is a partial cross-sectional side view of the vibration testing apparatus shown in FIG. 3. It is a perspective view of the vibration test apparatus using the motion conversion means which combined the gear and the rack. FIG. 6 is a partial cross-sectional front view of the vibration testing apparatus shown in FIG. 5. FIG. 7 is a partial cross-sectional side view of the vibration testing apparatus shown in FIG. 6. It is a disassembled perspective view of a gear attaching / detaching means. It is a side view in the assembly state of the structure shown in FIG. It is the perspective view which showed the example of an arrangement | sequence of a gear and a spacer. It is the perspective view which showed the example of an arrangement | sequence of a gear and a spacer. It is the fragmentary sectional front view which illustrated the combination of the gear and the rack. It is the fragmentary sectional front view which illustrated the combination of the gear and the rack. It is the fragmentary sectional front view which illustrated the combination of the gear and the rack. It is a disassembled perspective view of a vibration table. It is a partial side view in the assembly state of the structure shown in FIG. It is a partial side view of the structure using the planetary gear apparatus as a motion conversion means. It is a partial front view of the structure using the planetary gear apparatus as a motion conversion means. It is a perspective view at the time of using a crank mechanism as a motion conversion means. It is a perspective view at the time of using a belt apparatus as a motion conversion means.

Explanation of symbols

  1 Excitation table, 5, 11, 22, 26, 45, 49, 53 mounting table, 23L, 28L, 34L, 35L rack, 21G, 28G, 34G, 35G gear.

Claims (7)

  A vibration table having a linear motion, a mounting table rotatably supported by the vibration table, and a rotation driving means for applying a rotational motion to the mounting table in synchronization with the linear motion of the vibration table. Vibration test equipment.   2. The vibration testing apparatus according to claim 1, wherein the rotation driving means includes a movement converting means for changing the linear movement of the vibration table into the rotation movement of the mounting table.   The motion converting means includes a rack provided on a stationary member, and a gear that is rotatably supported by the vibration table and meshes with the rack and is configured integrally with the mounting table. Item 3. The vibration test apparatus according to Item 2.   4. A gear attaching / detaching means or a rack attaching / detaching means for allowing a plurality of combinations of the rack and the gear as a pair for each gear having a different number of teeth, which can be arbitrarily selected and used. Vibration test equipment.   The motion converting means is constituted by a planetary gear device that makes the linear motion of the vibration table variable to rotational motions of different speeds, and the planetary gear device includes a sun gear supported by the vibration table and a stationary member. A ring gear meshing with the provided rack, a pinion gear rotatably supported by the planetary carrier and meshing with the sun gear and the ring gear in common, and a brake function for braking the rotation of the pinion gear, and the ring gear as a stationary member 3. The vibration testing apparatus according to claim 2, wherein the mounting table is provided on the sun gear by meshing with a provided rack.   The motion conversion means includes a crankshaft rotatably supported on the vibration table, the mounting table rotating together with the crankshaft, and a link provided between the crankshaft and a stationary member. The vibration test apparatus according to claim 2.   The motion converting means includes a pair of pulleys rotatably supported on the vibration table, the mounting table rotating together with the pulleys, a belt wound around the pair of pulleys, and one of the belts. The vibration test apparatus according to claim 2, further comprising fixing means for fixing the portion to the immovable member.

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