JP2008213698A - Vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an efficient vibration control device capable of reducing an output of a damping means and attaining it by a small size damping means. <P>SOLUTION: The vibration control device 1 is provided with a load support part 10 installed on an installation part F; a counter-balance part 30 connected to the load support part 10 and giving load balanced with the load; and a vibration control part 20 having the damping means 21 for controlling the vibration relative to the installation part F of the load support part 10. The counter-balance part 30 has a second movement means 32 relatively movably supported on a second guide means 31; an adjustment means 34 having one end supported on the installation part F and changing length; an urging means 35 having one end connected to the other end of the adjustment means 34; a balance part 33 having fulcrum pivotally supported on the installation part F and having one end side turnably connected to the second movement means 32; and a displacement direction conversion means 40 connected to a portion between the other end side of the balance part 33 and the other end of the urging means 35 and converting a displacement direction at the other end side of the balance part 33 to a displacement direction of the adjustment means 34. <P>COPYRIGHT: (C)2008,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. 8A, when the sheet S is supported only by the actuator 121, the output of the actuator 121 is always required including the stopped state. Further, as shown in FIG. 8B, 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 stopped 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 of the present invention is to provide an efficient vibration control device that can reduce the output of the vibration damping means and can be realized by a small vibration damping means.

  Therefore, the present invention provides a load support unit installed in an installation unit, a counter balance unit that is connected to the load support unit and applies a load that balances the load, and a vibration control that controls vibration of the load support unit with respect to the installation unit. In the vibration control device including a vibration control unit having a means, the load support unit includes a first moving unit that moves relative to the installation unit, and the counter balance unit is configured to move relative to the load support unit. A second moving means that moves relative to each other, an adjusting means that is supported at one end by the setting portion to change the length, an urging means having one end connected to the other end of the adjusting means, and a fulcrum at the setting portion. A balance part pivotally supported and rotatably connected at one end side to the second moving means, and connected between the other end side of the balance part and the other end of the biasing means, The displacement direction of the other end side is the displacement direction of the adjusting means. And having a displacement direction conversion means for converting.

  Further, the displacement direction converting means is a third moving means connected to the other end side of the balance section, and a fourth moving connected to the other end of the urging means, relative to the third moving means. And a moving means.

  In addition, a detection unit that detects a state on the load support portion is provided, and a control unit that operates the adjustment unit or the vibration suppression unit according to the state detected by the detection unit.

  According to the first aspect of the present invention, the load support unit installed in the installation unit, the counter balance unit connected to the load support unit and providing a load that balances the load, and the vibration of the load support unit with respect to the installation unit. And a vibration control unit including a vibration control unit that controls the load support unit, the load support unit includes a first movement unit that moves relative to the installation unit, and the counter balance unit includes the load control unit. A second moving means that moves relative to the support section; an adjusting means that is supported at one end by the setting section and that changes the length; an urging means having one end connected to the other end of the adjusting means; A fulcrum is pivotally supported by the unit, and one end side is rotatably connected to the second moving means, and is connected between the other end side of the balance part and the other end of the urging means, The displacement direction of the other end side of the balance part is adjusted by the adjusting means. Displacement direction converting means for converting to the lateral direction, so that the output of the vibration damping means is reduced and the horizontal load of the biasing means is canceled, so that it can be realized with a small vibration damping means such as a counterweight. Since it is not necessary to apply a heavy object, it can be placed in a small space, and the durability is improved by aligning the displacement direction of the other end side of the balance part and the adjusting means, and the degree of freedom of design is increased. .

  According to a second aspect of the present invention, the displacement direction converting means moves relative to the third moving means connected to the other end of the balance section, and the third moving means, and the biasing means And a fourth moving means connected to the other end, so that the durability is improved by arranging the other end side of the balance portion and the displacement direction of the adjusting means with a simple structure, and the fourth moving means is arranged in a small space. This increases the degree of design freedom.

  According to a third aspect of the present invention, there is provided a detecting means for detecting a state on the load supporting portion, and a control means for operating the adjusting means or the vibration damping means according to the state detected by the detecting means. Therefore, it is possible to appropriately cope with a change in load.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a vibration control device 1 according to an embodiment of the present invention. In the figure, 1 is a vibration control device, 10 is a load support portion, 11 is a load support member, 12 is a first slider as an example of a first moving means, 13 is a first slider rail as an example of a first guide means, 20 is a vibration control unit, 21 is a vibration control actuator as an example of a vibration control unit, 22 is a load sensor as an example of a detection unit, 23 is an acceleration sensor as an example of a detection unit, 30 is a counter balance unit, and 31 is The second slider rail as an example of the second guide means, 32 is the second slider as an example of the second moving means, 33 is the balance section, 34 is the preload adjusting actuator as the adjusting means, and 35 is an example of the urging means. , 40 is a displacement direction converting means, 41 is a third slider as an example of third moving means, 42 is a third slider rail as an example of third guiding means, 4 The fourth slider as an example of a fourth moving means 44 and the fourth slider rail, F is set portion of an example of a fourth guide means, S is a sheet.

  The vibration control device 1 is installed on the installation unit F such as a floor by the load support unit 10. The vibration control unit 20 actively controls the vibration of the load such as the sheet S on the vibration control device 1 and the counter balance unit 30. The balance of force against the load is set.

  The load support unit 10 includes a load support member 11 that supports the sheet S, a first slider 12 provided on the load support member 11, a first slider rail 13 installed on the installation unit F, and the like. The load support member 11 has a first slider 12 installed below the seat S and guided in the vertical direction by the first slider rail 13, and is placed on the vibration control unit 20 and the counter balance unit 30. The first slider 12 is provided on the load support member 11, is guided in the vertical direction by the first slider rail 13, and moves relative to the installation portion F. The 1st slider rail 13 is installed in the installation part F, and guides the 1st slider 12 and the load support member 11 to an up-down direction.

  The vibration control unit 20 includes a vibration control actuator 21 such as a voice coil motor, a load sensor 22 such as a load cell, an acceleration sensor 23, and the like. The vibration control actuator 21 is controlled such that the lower part is installed in the installation part F and the upper part is brought into contact with the load support member 11 and can be moved up and down by signals from sensors such as the load sensor 22 and the acceleration sensor 23. Is done. The load sensor 22 is provided between the seat S and the load support member 11, and mainly controls the preload adjusting actuator based on the detected value. The acceleration sensor 23 detects the acceleration on the load support member 11, and mainly controls the vibration control actuator based on the detected value. In the present embodiment, the acceleration sensor 23 is applied. However, a sensor that detects a state on the load support member 11 such as a speed sensor or a displacement sensor may be applied.

  The counter balance unit 30 includes a second slider rail 31, a second slider 32, a balance unit 33, a preload adjusting actuator 34, a spring 35, a displacement direction converting unit 40, and the like. The displacement direction converting unit 40 includes a third slider. 41, a third slider rail 42, a fourth slider 43, a fourth slider rail 44, and the like.

  The 2nd slider rail 31 is installed in the load support member 11, and guides the 2nd slider 32 so that a movement is possible. The second slider 32 is connected to one end of the balance portion 33, is guided by the second slider rail 31, and moves relative to the load support portion 10.

  The balance portion 33 has a fulcrum 33 a at the installation portion F, and connects the one end 33 b side to the second slider 32 and the other end 33 c side to the third slider 41. The third slider 41 is guided by a third slider rail 42 provided on the fourth slider 43, and the fourth slider 43 is guided by a fourth slider rail 44 provided on the installation portion F and is relative to the third slider. Moving. The fourth slider connected to the other end of the spring 35, provided with the third slider 41 connected to the other end of the balance 33, the third slider rail for guiding the third slider 41, and the third slider rail. The fourth slider rail installed in the installation section F and guiding the fourth slider in the displacement direction of the preload adjusting actuator 34 is an example of the displacement direction converting means 40.

  The other end 33c side may be bent at the fulcrum 33a or the like with respect to the one end 33b side so that the fulcrum 33a of the balance portion 33 is on the opposite side of the spring 35 from a straight line passing through the one end 33b and the other end 33c. . Thereby, the space for arranging the balance portion 33 is reduced. The shape of the balance portion 33 is not limited to the bending at the fulcrum 33a, but may be bent at another portion or may be a curved shape.

  The preload adjusting actuator 34 has a variable length, and one end is connected to the installation portion F and the other end is fixed to the spring 35. One end of the spring 35 is fixed to the preload adjusting actuator 34, and the other end is fixed to the fourth slider 43. When the preload adjusting actuator 34 and the spring 35 are disposed, durability is improved if the expansion / contraction direction of the preload adjusting actuator 34 and the expansion / contraction direction of the spring 35 are the same.

  FIG. 2 shows a block diagram of the vibration control apparatus 1 having such a structure. Input signals from the acceleration sensor 23 and the load sensor 22 are input to the ECU 50 as control means, and the vibration control actuator 21 and the preload adjustment actuator 34 are controlled, so that vibration is actively controlled according to the load.

  Next, preload adjustment control will be described. FIG. 3 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, a predetermined amount of the detected load value is read into the ECU 50 (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 preload adjustment actuator 34 is controlled to operate in accordance with the calculated reference load value (ST4).

  4 shows the state of the vibration control device 1 before and after the preload adjustment control. FIG. 4 (a) shows the state before the preload adjustment control, and FIG. 4 (b) shows the state after the preload adjustment control. From the state before the preload adjustment control shown in FIG. 4A, for example, when the occupant P sits on the seat S and the load of the occupant P is added to the initial load, the balance portion 33 of the counter balance portion 30 is centered on the fulcrum 33a. 4, the third slider 41 moves upward along the third slider rail 42, and the fourth slider 43 moves along the fourth slider rail 44 in the right direction in FIG. 4. It moves, the spring 35 is extended, and the spring 35 is loaded. Therefore, as shown in FIG. 4B, the load and the load by the spring 35 are balanced by operating the preload adjusting actuator 34.

  Thus, by operating the preload adjusting actuator 34, the load is canceled, and vibration control can be performed from that state.

  Next, the vibration control of this embodiment will be described. FIG. 5 shows a flowchart of vibration control. First, in step 11, the load during vibration is detected by the load sensor 22 (ST11). Next, in step 12, it is compared whether the detected load value is the same as the reference load value obtained by the preload adjustment control (ST12). In the same case, the vibration control actuator 21 is not operated and the vibration control is terminated. If not, it is determined in step 13 whether the detected load value is larger than the reference load value obtained by the preload adjustment control (ST13). If the detected load value is larger than the reference load value obtained by the preload adjustment control, the vibration control actuator 21 is contracted in step 14 (ST14). If the detected load value is smaller than the reference load value obtained by the preload adjustment control, in step 15, the damping actuator 21 is extended (ST15).

  6 shows a state of vibration control. FIG. 6A shows a state in which the damping actuator 21 is contracted, and FIG. 6B shows a state in which the damping actuator 21 is extended.

  FIG. 6A shows a case where the detected load value corresponding to step 14 is larger than the reference load value obtained by the preload adjustment control. In this case, when the damping actuator 21 is contracted to reduce the vibration on the sheet S to 0, the second slider 32 moves forward (to the left in FIG. 6A) and the balance unit 33 moves the fulcrum 33a. Rotates counterclockwise about the center. Along with this, the third slider 41 moves upward along the third slider rail 42, and the fourth slider 43 moves along the fourth slider rail 44 in the right direction in FIG. The spring 35 is slightly extended. At this time, although the spring 35 is extended, the vertical component of the reaction force due to the extension of the spring 35 is substantially canceled, and the load and the load by the spring 35 can be kept in a substantially balanced state.

  FIG. 6B shows a case where the detected load value corresponding to step 15 is smaller than the reference load value obtained by the preload adjustment control, and when the damping actuator 21 is extended to make the vibration on the seat S zero, The second slider 32 moves rearward (rightward in FIG. 6B), and the balance portion 33 rotates clockwise. Accordingly, the third slider 41 moves downward along the third slider rail 42, and the fourth slider 43 moves along the fourth slider rail 44 in the left direction in FIG. The spring 35 is slightly contracted. At this time, the spring 35 contracts, but the vertical component of the reaction force due to the contraction of the spring 35 is almost canceled, and the load and the load by the spring 35 can be kept in a substantially balanced state.

  Thus, since the load and the load by the spring 35 can be kept in a substantially balanced state, the output of the vibration control actuator 21 can be reduced.

  FIG. 7 shows the result of comparing the case of using the vibration control device 1 of the present embodiment and the case of the prior art shown in FIG. 8 by simulation. In the simulation, an actuator for vibration suppression necessary for reducing the vibration of the load to 0 under the condition of traveling on a wavy path with an amplitude of 25 mm and a period of 750 mm at a speed of 70 km / h was obtained.

  FIG. 7A shows the case where the sheet is supported only by the actuator as shown in FIG. 8A. FIG. 7B shows the case where the sheet is supported by the actuator as shown in FIG. 8B. In the case of using a spring, FIG. 7C shows the case of this embodiment.

  As described above, the vibration control apparatus 1 according to the present embodiment includes the load support unit 10 installed in the installation unit F, the counter balance unit 30 connected to the load support unit 10 and providing a load that balances the load, and the load support unit 10. In the vibration control apparatus 1 including the vibration control unit 20 including the actuator 21 that controls the vibration of the installation unit F, the load support unit 10 includes a first slider 12 that moves relative to the installation unit F. The counter balance unit 30 includes a second moving unit 32 that moves relative to the load support unit 10, a preload adjustment actuator 34 that changes the length supported at one end by the installation unit F, and a preload adjustment actuator that has one end. A spring 35 connected to the other end of 34, a balance part 33 pivotally supported by the installation part F and rotatably connected to the second slider 32 at one end side, Displacement direction conversion means 40 connected between the other end side of the scale portion 33 and the other end of the spring 35 and converting the displacement direction of the other end side of the balance portion 33 into the displacement direction of the preload adjusting actuator 34. Therefore, since the output of the vibration control actuator 21 is reduced and the horizontal load of the spring is canceled, it can be realized with a small vibration control actuator 21 and there is no need to apply a heavy weight such as a counterweight. In addition to being able to arrange in a small space, durability is improved by aligning the displacement direction of the other end side of the balance portion 33 and the preload adjusting actuator 34, and the degree of freedom of design is increased.

  The displacement direction converting means 40 includes a third slider 41 connected to the other end of the balance 33, a fourth slider that moves relative to the third slider 41, and is connected to the other end of the spring 35; Therefore, durability is improved by arranging the displacement directions of the spring 35 and the preload adjusting actuator 34 with a simple structure, and the arrangement can be made in a small space, and the degree of freedom of design is increased.

  Further, a load sensor 22 or an acceleration sensor 23 that detects a load on the load support unit 10 is provided, and the preload adjustment actuator 34 or the vibration suppression actuator 21 is provided according to the load detected by the load sensor 22 or the acceleration sensor 23 or the like. Since the ECU 50 that operates is provided, it is possible to appropriately cope with a change in load.

It is a figure which shows the vibration control apparatus of this embodiment. 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 state of the vibration control apparatus 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 state of the vibration control apparatus at the time of vibration control. It is a figure which shows the simulation which compared the vibration control apparatus of this embodiment, and the prior art. It is a figure which shows the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vibration control apparatus, 10 ... Load support part, 11 ... Support member, 12 ... 1st slider (1st moving means), 13 ... 1st slider rail (1st guide means), 20 ... Vibration control part, 21 ... Damping actuator (vibration means), 22 ... load sensor, 23 ... acceleration sensor, 30 ... counter balance unit, 31 ... second slider rail (second guide means), 32 ... second slider (second movement means) , 33 ... balance unit, 34 ... preload adjusting actuator (adjusting means), 35 ... spring (biasing means), 40 ... displacement direction converting means, 41 ... third slider (third moving means), 42 ... third slider Rail (third guiding means), 43 ... fourth slider (fourth moving means), 44 ... fourth slider rail (fourth guiding means), 50 ... ECU (control means), F ... installation section, S ... seat

Claims (3)

A vibration control unit including a load support unit installed in the installation unit, a counter balance unit connected to the load support unit to provide a load that balances the load, and a vibration control unit that controls vibration of the load support unit with respect to the installation unit. In a vibration control device comprising:
The load support portion includes first moving means that moves relative to the installation portion,
The counter balance unit includes a second moving unit that moves relative to the load support unit, an adjustment unit that is supported at one end by the installation unit and changes a length, and one end connected to the other end of the adjustment unit. An urging means, a balance part pivotally supported by the installation part, one end side of which is rotatably connected to the second moving means, the other end side of the balance part, and the urging means Displacement direction conversion means connected between the other end and converting the displacement direction on the other end side of the balance section into the displacement direction of the adjustment means.   The displacement direction converting means includes a third moving means connected to the other end of the balance part, and a fourth moving means connected to the other end of the urging means and relatively moving with respect to the third moving means. The vibration control device according to claim 1, further comprising:   2. The apparatus according to claim 1, further comprising a detecting unit that detects a state on the load supporting unit, and a control unit that operates the adjusting unit or the vibration damping unit according to the state detected by the detecting unit. The vibration control device according to claim 2.

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