JP2009056875A - Vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control device which can reduce an output of a vibration control part, and is high in efficiency. <P>SOLUTION: In the vibration control device 1 which comprises: an installation part F; a load supporting part 10 for supporting a load; a counter balance part 30 for imparting a load which is balanced with the load on the load supporting part 10; and a vibration control part 20 for controlling vibration transmitted to the installation part F of the load supporting part 10, the vibration control device is characterized by comprising a torsion bar 51 which is connected to the load supporting part 10 via a reduction mechanism 40, and elastically supports the load supporting part 10 to the installation part F, wherein the torsion bar 51 is connected to the counter balance part 30, and imparted with the load which is balanced with the load of the load supporting part 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration control device that suppresses or reduces vibration applied to a riding section such as a seat, particularly a riding section such as a seat installed in a moving body.

2. Description of the Related Art Conventionally, there is a seat vibration control device that suppresses vibration applied to a seat by controlling the operation of a direct-acting electric actuator under the seat according to vibration acceleration (see Patent Document 1).
JP-A-11-180202

  However, as shown in FIG. 10A, when the sheet S is supported only by the actuator 121, the output of the actuator 121 is always required including the stopped state. As shown in FIG. 10B, when the sheet S is supported by the actuator 121 and the spring 122, the output of the actuator 121 can be zero in the stop state, but the vibration of the sheet S is controlled. The spring force of the spring 122 becomes a reaction force, and in addition to the output for vibration control, an output for the reaction force of the spring is required for the actuator 121, and a large output is required.

  The present invention solves the above-described problems, and an object thereof is to provide an efficient vibration control device capable of reducing the output of the vibration control unit.

  Therefore, the present invention provides an installation unit, a load support unit that supports a load, a counter balance unit that provides a load that balances the load on the load support unit, and a vibration that controls vibration of the load support unit with respect to the installation unit. A vibration control device including a control unit, and a torsion bar coupled to the load support unit via a speed reduction mechanism and elastically supporting the load support unit with respect to the installation unit. The counter balance unit is connected to the counter balance unit, and a load balanced with the load on the load support unit is applied.

  Further, the torsion bar is rotatably supported by the installation part, and is connected to the speed reduction mechanism at one end side and is connected to the counter balance part at the other end side.

  Further, the speed reduction mechanism includes a toothed member that rotates in synchronization with the torsion bar, and a gear that rotates in synchronization with the load support portion.

  The counter balance unit includes a load setting unit that sets a load that balances the load on the load support unit, and a link unit that applies the load set by the load setting unit to the torsion bar. And

  According to the first aspect of the present invention, the installation portion, the load support portion that supports the load, the counter balance portion that applies a load that balances the load on the load support portion, and the vibration of the load support portion with respect to the installation portion. A vibration control unit for controlling the load control unit, including a torsion bar coupled to the load support unit via a speed reduction mechanism and elastically supporting the load support unit with respect to the installation unit, Since the torsion bar is connected to the counter balance part and is given a load that balances the load on the load support part, it is possible to provide a vibration control device that reduces the output and weight of the vibration control part.

  According to the invention of claim 2, the torsion bar is rotatably supported by the installation portion, is connected to the speed reduction mechanism at one end side, and is connected to the counter balance portion at the other end side. A small, efficient, and low-cost vibration control device can be provided.

  According to a third aspect of the present invention, the speed reduction mechanism has a toothed member that rotates in synchronization with the torsion bar and a gear that rotates in synchronization with the load support portion. The change of the part can be efficiently transmitted to the torsion bar.

  According to a fourth aspect of the present invention, the counter balance unit includes a load setting unit that sets a load that balances the load on the load support unit, and a link that applies the load set by the load setting unit to the torsion bar. The load can be accurately and efficiently transmitted to the torsion bar.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a vibration control device 1 according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a plan view. In the figure, 1 is a vibration control device, 10 is a load support portion, 11 is a load support member, 12 is a lever, 13 is a gear support shaft, 20 is a vibration control portion, and 21 is a vibration control actuator as an example of vibration control means. , 30 is a counter balance unit, 31 is a link unit, 32 is a load setting unit, 40 is a speed reduction mechanism, 41 is a gear, 42 is a toothed member, 51 is a torsion bar, and F is an installation unit.

  The vibration control device 1 is installed in an installation part F such as a floor, and actively controls the vibration of the load support member 11 on which the sheet S or the like on the vibration control device 1 is placed by the vibration control actuator 21.

  The load support unit 10 includes a load support member 11, a lever 12, a gear support shaft 13, and the like. The load support member 11 is a member that places and supports the sheet S and the like on the top. The lever 12 is connected to the load support member 11 at one end side, and is inserted and locked through the gear support shaft 13 at the other end side. The gear support shaft 13 is rotatably supported by the installation portion F.

  The vibration control unit 20 includes a vibration control actuator 21 and an acceleration sensor, a load sensor, and the like which will be described later. The vibration control actuator 21 such as a voice coil motor has a lower part installed in the installation part F and an upper part in contact with the load support member 11 to detect a state on the load support member 11 such as an acceleration sensor or a load sensor (not shown). It is controlled to move up and down by a signal from the sensor. In addition, you may apply what detects the state on the load support members 11, such as a speed sensor and a displacement sensor, instead of an acceleration sensor.

  The speed reduction mechanism 40 includes a toothed member 41 and a gear 42. The gear 42 is locked so as to rotate in synchronization with the gear support shaft 13. The toothed member 41 is locked so as to rotate in synchronization with a torsion bar 51 described later. The toothed member 41 and the gear 42 are configured to mesh with the tooth portion 41a and the tooth portion 42a, respectively.

  The torsion bar 51 is rotatably supported by the installation part F, engages the toothed member 41 of the speed reduction mechanism 40 that rotates together with the torsion bar 51 on one end side, and the link part 31 of the counter balance part 30 on the other end side. It is connected with.

  FIG. 4 is an enlarged perspective view of the counter balance unit 30.

  The counter balance unit 30 includes a link unit 31 and a load setting unit 32. The link part 31 includes a first link part 31a that is locked to the torsion bar 51 on one side, a second link part 31b that is connected to the other side of the first link part 31a, and a first link part 31a. A first connecting part 31ab that connects the second link part 31b, a third link part 31c that is connected to the other side of the second link part 31b, a second link part 31b, and a third link part 31c. Second link portion 31bc to be connected, link shaft 31d locked to the other side of third link portion 31c on one side, and fourth link portion 31e connected to load setting portion 32 on the other side of link shaft 31d. And a third connecting portion 31 ef for connecting the fourth link portion 31 e and the load setting portion 32.

  The load setting unit 32 includes a moving member 32a and a guide member 32b. The moving member 32a is a movable member guided by the guide member 32b, and is connected by the fourth link 31e and the third connecting portion 31ef.

  FIG. 5 shows a block diagram of the vibration control apparatus 1 having such a structure. Input signals from the input means such as the load sensor 22 and the acceleration sensor 23 are input to the ECU 60 as the control means, and the vibration is actively controlled in accordance with the load by controlling the vibration control actuator 21 or the torsion bar 51. .

  Next, preload adjustment control will be described. FIG. 6 shows a flowchart of the preload adjustment control. First, in step 1, the load at the time of stopping without vibration is detected by the load sensor 22 (ST1). Next, in step 2, the detected load value for a certain time is read into the ECU 60 (ST2). Subsequently, in step 3, for example, an average value is calculated from the load values for a certain period of time to calculate a reference load value (ST3). Next, in step 4, the operation of the load setting unit 32 is controlled according to the calculated reference load value (ST4).

  Next, the operation of the counter balance unit 30 will be described with reference to FIG. FIG. 7 is an enlarged side view of the counter balance unit 30. As shown in the flowchart of FIG. 6, the preload adjustment by the counter balance unit 30 moves the moving member 32 a of the load setting unit 32 according to the load value of the load sensor 22, and rotates the torsion bar 51 through the link unit 31. Execute by moving. The movement of the moving member 32a moves the moving member 32a along the guide member 32b according to the sensor value. Alternatively, the moving member 32a may be moved by providing a screw at a contact portion between the moving member 32a and the guide member 32b and rotating the guide member 32b.

  As the moving member 32a moves, the third connecting portion 31ef moves, and the fourth link 31e rotates about the link shaft 31d. As the fourth link 31e rotates, the link shaft 31d rotates about the axis. By the rotation of the link shaft 31d, the third link portion 31c rotates about the link shaft 31d. Due to the rotation of the third link portion 31c, the second connecting portion 31bc is pulled by the third link portion 31c, and the second link portion 31b moves. Due to the movement of the second link portion 31b, the first connecting portion 31ab is pulled by the second link portion 31b, and the first link portion 31a rotates around the torsion bar 51. The torsion bar 51 rotates about the axis by the rotation of the first link portion 31a.

  By the rotation of the torsion bar 51, a load is applied to the torsion bar 51, and the load and the load by the torsion bar 51 are balanced.

  FIG. 7A shows a diagram in a normal state. FIG. 7B shows a state in which the moving member 32a is moved to the right side toward the paper surface. In this state, the torsion bar 51 rotates clockwise. FIG. 7C shows a state in which the moving member 32a is moved to the left side toward the paper surface. In this state, the torsion bar 51 rotates counterclockwise.

  Thus, by operating the torsion bar 51, the load is canceled, and vibration control can be performed from this state.

  Next, the vibration control of this embodiment will be described. FIG. 8 shows a flowchart of vibration control. First, in step 11, the acceleration during vibration is detected by the acceleration sensor 23 (ST11). Next, at step 12, the ECU 40 calculates the thrust of the vibration damping actuator 21 (ST12). The thrust calculation is executed, for example, by storing a calculation formula such as acceleration × friction × gain × (−1) or a thrust value corresponding to the acceleration in advance. Here, the gain in the calculation formula represents the control delay, and -1 represents the reversal of the direction. Subsequently, in step 13, the thrust calculated in step 12 is instructed to the vibration control actuator 21.

  FIG. 9 shows a state of vibration control. FIG. 9A shows a state in which the damping actuator 21 is contracted, and FIG. 9B shows a state in which the damping actuator 21 is extended.

  FIG. 9A shows a case where the thrust instruction obtained from the acceleration corresponding to step 13 is the contraction of the damping actuator 21, or the detected load value corresponding to step 24 is larger than the reference load value obtained by the preload adjustment control. When the vibration control actuator 21 is contracted to reduce the vibration on the sheet S to 0, the lever 12 rotates about the gear support shaft 13 counterclockwise toward the paper surface of FIG. To do. As the lever 12 rotates, the gear support shaft 13 and the gear 42 rotate.

  The reduction mechanism 40 is actuated by the rotation of the gear 42, and the toothed member 41 engaged with the tooth portion 42 a and the tooth portion 41 a of the gear 42 rotates about the torsion bar 51. As a result, the torsion bar 51 rotates, but since the preload adjustment has been executed in advance, the reaction force of the torsion bar 51 is small, and the output of the vibration control actuator 21 can be kept small.

  FIG. 9B shows a case where the thrust instruction obtained from the acceleration corresponding to step 13 is extension of the vibration control actuator 21 or the detected load value corresponding to step 25 is smaller than the reference load value obtained by the preload adjustment control. In this case, when the vibration control actuator 21 is extended to reduce the vibration on the sheet S to 0, the lever 12 rotates about the gear support shaft 13 toward the paper surface of FIG. . As the lever 12 rotates, the gear support shaft 13 and the gear 42 rotate.

  The reduction mechanism 40 is actuated by the rotation of the gear 42, and the toothed member 41 engaged with the tooth portion 42 a and the tooth portion 41 a of the gear 42 rotates about the torsion bar 51. As a result, the torsion bar 51 rotates, but since the preload adjustment has been executed in advance, the reaction force of the torsion bar 51 is small, and the output of the vibration control actuator 21 can be kept small.

  In this way, the installation portion F, the load support portion 10 that supports the load, the counter balance portion 30 that applies a load that balances the load on the load support portion 10, and the vibration of the load support portion 10 with respect to the installation portion F are controlled. The vibration control apparatus 1 including the vibration control unit 20 includes a torsion bar 51 that is connected to the load support unit 10 via the speed reduction mechanism 40 and elastically supports the load support unit 10 with respect to the installation unit F. Since the torsion bar 51 is connected to the counter balance unit 30 and is given a load that balances the load on the load support unit 10, the vibration control device 1 with reduced output and weight of the vibration control unit 20 can be provided. .

  In addition, the torsion bar 51 is rotatably supported by the installation portion F, and is connected to the speed reduction mechanism 40 at one end side and is connected to the counter balance portion 30 at the other end side. An inexpensive vibration control device 1 can be provided.

  Further, since the speed reduction mechanism 40 includes the toothed member 41 that rotates in synchronization with the torsion bar 51 and the gear 42 that rotates in synchronization with the load support unit 10, the variation of the load support unit 10 is efficiently performed. Can be transmitted to the torsion bar 51.

  In addition, the counter balance unit 30 includes a load setting unit 32 that sets a load that balances the load on the load support unit 10 and a link unit 31 that applies the load set by the load setting unit 32 to the torsion bar 51. The load can be transmitted to the torsion bar 51 accurately and efficiently.

It is a perspective view which shows the vibration control apparatus of this embodiment. It is a side view which shows the vibration control apparatus of this embodiment. It is a top view which shows the vibration control apparatus of this embodiment. It is an expansion perspective view of a counter balance part. It is the block diagram which showed the system configuration | structure of the vibration control apparatus. It is a figure which shows the flowchart of preload adjustment control. It is a figure which shows the operation state of the counter balance part at the time of preload adjustment control. It is a figure which shows the flowchart of vibration control. It is a figure which shows the operating state of the vibration control apparatus at the time of vibration control. It is a figure which shows the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vibration control apparatus, 10 ... Load support part, 11 ... Load support member, 12 ... Lever, 13 ... Gear support shaft, 20 ... Vibration control part, 21 ... Vibration control actuator (vibration control means), 22 ... Load Sensor (input means), 23 ... Acceleration sensor (input means), 30 ... Counter balance part, 31 ... Link part, 32 ... Load setting part, 40 ... Reduction mechanism, 41 ... Gear, 42 ... Toothed member, 51 ... Torsion Bar, F ... installation section

Claims (4)

An installation unit; a load support unit that supports a load; a counter balance unit that applies a load that balances the load on the load support unit; and a vibration control unit that controls vibration of the load support unit with respect to the installation unit. In the vibration control device
A torsion bar connected to the load support portion via a speed reduction mechanism, and elastically supporting the load support portion with respect to the installation portion;
The vibration control device, wherein the torsion bar is connected to the counter balance unit and is given a load that balances a load on the load support unit.   2. The vibration according to claim 1, wherein the torsion bar is rotatably supported by the installation portion, is connected to the speed reduction mechanism at one end side, and is connected to the counter balance portion at the other end side. Control device.   The speed reduction mechanism includes a toothed member that rotates in synchronization with the torsion bar, and a gear that rotates in synchronization with the load support portion. Vibration control device.   The counter balance unit includes: a load setting unit that sets a load that balances the load on the load support unit; and a link unit that applies the load set by the load setting unit to the torsion bar. The vibration control device according to any one of claims 1 to 3.

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