JP2013190046A - Vibration damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damping device which can be easily carried in to an installation location, and whose assembly work is remarkably simple.SOLUTION: A vibration damping device includes: a base 1; a movable mass 2 movable back and forth on the base 1; and an actuator A for reciprocating the movable mass 2. The actuator A includes: a fixed rack 4 fixed to the base 1 and arranged along the moving direction of the movable mass 2; a mass side rack 5 fixed to the movable mass 2 to face the fixed rack 4; a pinion gear 6 sandwiched between the fixed rack 4 and the mass side rack 5 and engaging with the both; and a telescopic cylinder device 7 rotatably holding the pinion gear 6 at one end, and connected to the base at the other end.

Description

  The present invention relates to a vibration damping device.

  Conventionally, as a vibration control device, for example, a gantry, a movable mass that can reciprocate on the gantry, and an actuator that reciprocates the movable mass are provided, and the actuator is arranged around the axis on the gantry. A screw shaft that is rotatably mounted; a ball nut that is rotatably screwed to the screw shaft and fixed to the movable mass; and an electric motor that is fixed to the gantry and the rotor is connected to the screw shaft. (For example, refer to Patent Document 1).

  This type of vibration control device is installed on the upper floor of a building, and when the building vibrates due to wind, earthquake, etc., it vibrates the movable mass with an actuator, and the building is vibrated by the vibration of this movable mass. Can be suppressed.

Japanese Patent Laid-Open No. 06-33638

  By the way, in the conventional vibration damping device, the movable mass is composed of a feed screw mechanism composed of a screw shaft and a ball nut and an electric motor, and the movable mass is reciprocated by driving the electric motor. The total length of the screw shaft must be set to be at least the stroke length of the movable mass.

  Moreover, since the electric motor and the screw shaft must be adjusted coaxially, it is preferable to carry the electric motor and the screw shaft attached to the gantry, but it is intended to install a vibration control device in an existing building. In this case, when the electric motor and the screw shaft are integrated, the electric motor and the screw shaft become long and may not fit in the elevator of the building, and the vibration damping device may not be carried into the installation site of the vibration damping device.

  In such a case, it is necessary to connect the electric motor and the screw shaft at the installation location and to adjust the coaxial of both after carrying in the installation location with the electric motor and the screw shaft separated. Thus, the assembly work becomes complicated.

  Therefore, in the conventional vibration damping device, there are problems that it is difficult to carry into the installation place and the assembly work is complicated.

  Therefore, the present invention has been made to solve the above-described problems, and the object of the present invention is to provide a vibration damping device that can be easily carried into an installation place and can be easily assembled. is there.

  In order to achieve the above-described object, a vibration damping device in the problem solving means of the present invention includes a gantry, a movable mass that can reciprocate on the gantry, and an actuator that reciprocates the movable mass. The actuator includes: a fixed rack that is fixed to the gantry and extends along a moving direction of the movable mass; a mass-side rack that is fixed to the movable mass and faces the fixed rack; the fixed rack and the mass-side rack; And a telescopic cylinder device that rotatably holds the pinion gear at one end and is connected to the gantry at the other end.

  As described above, the vibration damping device of the present invention employs a system in which a mechanism composed of a fixed rack, a mass side rack, and a pinion gear is driven by the telescopic cylinder device, and alignment adjustment is easy.

  Further, since the movable mass can be driven by amplifying the stroke distance due to the expansion / contraction operation of the cylinder device, it is possible to use a cylinder device having a short stroke length.

  According to the vibration damping device of the present invention, it is easy to carry into the installation place, and the assembling work becomes very simple.

It is a front view of the vibration damping device in one embodiment. It is sectional drawing of the damping device in one embodiment.

  The present invention will be described based on the embodiment shown in the drawings. As shown in FIGS. 1 and 2, the vibration damping device in one embodiment includes a gantry 1, a movable mass 2 that can reciprocate on the gantry 1, and an actuator A that reciprocates the movable mass 2. It is prepared for.

  Hereinafter, each part will be described in detail. As shown in FIGS. 1 and 2, the gantry 1 is divided into two in the longitudinal direction, and is composed of a rack-side gantry 1a on which the movable mass 2 travels and a cylinder-side gantry 1b. The rack side mount 1a and the cylinder side mount 1b may be connected by bolting or the like, but is not limited to this, and any connection method can be adopted.

  As shown in FIGS. 1 and 2, the movable mass 2 is placed on the rack side frame 1a. The movable mass 2 has a recess 2a at the center of the lower end, and the left and right ends of FIG. 2 sandwiching the recess 2a and the rack side frame 1a. Linear guides 3 and 3 are interposed therebetween, and can travel on the rack-side gantry 1a in the left-right direction in FIG.

  The actuator A is fixed to the upper surface of the rack-side gantry 1a of the gantry 1 and the fixed rack 4 along the moving direction of the movable mass 2, and the mass side fixed to the bottom surface of the concave portion 2a of the movable mass 2 and facing the fixed rack 4. A rack 5, a pinion gear 6 that is sandwiched between the fixed rack 4 and the mass-side rack 5 and meshes with each other, and the pinion gear 6 is rotatably held at one end and the other end is connected to the cylinder-side mount 1 b in the mount 1. It is comprised with the electric servo cylinder 7 as an expansion-contraction type cylinder apparatus connected.

  The fixed rack 4 is fixed to the rack side gantry 1a with its teeth facing upward along the horizontal direction in FIG. On the other hand, the mass side rack 5 is fixed to the bottom surface of the concave portion 2a of the movable mass 2 with the teeth facing downward along the horizontal direction in FIG. They are arranged in parallel while facing each other.

  The pinion gear 6 is interposed between the fixed rack 4 and the mass-side rack 5 while meshing with the fixed rack 4 and the mass-side rack 5. The fixed rack 4, the mass side rack 5, and the pinion gear 6 preferably have a structure with reduced backlash.

  The pinion gear 6 is rotatably attached to one end of the electric servo cylinder 7. The electric servo cylinder 7 can be expanded and contracted in the left-right direction in FIG. 1 which coincides with the direction in which the movable mass 2 can reciprocate. By extending and retracting the electric servo cylinder 7, the pinion gear 6 is moved in FIG. It can be moved in the middle / left / right direction. When the axis of the electric servo cylinder 7 in the expansion / contraction direction and the locus of the rotation center when the pinion gear 6 travels on the fixed rack 4 are on the same line, the other end of the electric servo cylinder 7 does not move to the cylinder side mount 1b. In this case, the pinion gear 6 is rotatably connected along a plane including the traveling direction of the pinion gear 6 and the vertical direction of the gantry 1. Thus, the drive of the pinion gear 6 is not hindered even if the locus and the axis of the electric servo cylinder 7 in the expansion / contraction direction are not on the same line. The electric servo cylinder 7 and the gantry 1 may be connected via a ball joint. In this case, the pinion gear 6 can be smoothly absorbed by absorbing lateral movement of the pinion gear 6 with respect to the traveling direction. Can be driven. In addition, as a cylinder apparatus, the cylinder apparatus which expands / contracts using hydraulic pressure or gas pressure other than an electric servo cylinder can also be used.

  Here, the operation of the mechanism of the pinion gear 6, the fixed rack 4, and the mass side rack 5 will be described. First, it is considered that the fixed rack 4 and the mass side rack 5 are not fixed, the rotation shaft of the pinion gear 6 is fixed, and the pinion gear 6 is rotated on the spot. In this case, when the pinion gear 6 rotates clockwise in FIG. 1, the lower fixed rack 4 moves to the left and the upper mass side rack 5 moves to the right, but the fixed rack 4 and mass side rack 5 move. The distance is equal. That is, when the pinion gear 6 rotates on the spot, the movement directions of the fixed rack 4 and the mass side rack 5 are opposite to each other about the pinion gear 6 but the movement distances are equal. Subsequently, when the fixed rack 4 is fixed, the pinion gear 6 can be rotated on the rotation shaft and moved in the right direction, and the mass side rack 5 is also movable in the left and right direction, that is, the actuator A In the case of the same configuration, when the pinion gear 6 is moved in the right direction, the pinion gear 6 rotates clockwise because the fixed rack 4 is fixed. When the pinion gear 6 rotates, the movements of the fixed rack 4 and the mass side rack 5 are opposite to each other and the movement distances are equal. However, since the fixed rack 4 is fixed, the fixed rack 4 does not move but instead of the mass rack 5 Only the pinion gear 6 moves to the right side, and the pinion gear 6 becomes the center of the relative movement of the fixed rack and the mass side rack 5, and as a result, the mass side rack 5 moves to the right of the pinion gear 6 Will move to the right by a distance twice as long. On the other hand, when the pinion gear 6 is moved to the left in FIG. 1, the mass side rack 5 moves to the left side by a distance twice as long as the movement of the pinion gear 6 as described above. Therefore, by moving the pinion gear 6 in the left-right direction in FIG. 1 by the electric servo cylinder 7, the movable mass 2 can be moved twice as much as the expansion / contraction movement distance of the electric servo cylinder 7. In this case, since the concave portion 2a is provided in the movable mass 2, so that the movable mass 2 does not interfere with the electric servo cylinder 7 even if the movable mass 2 moves to the cylinder device side in the left direction in FIG. It has become. If the recess 2a is not provided, legs for supporting the linear guides 3 and 3 may be provided on the gantry 1 side.

  As described above, the vibration damping device of the present invention employs a system in which the mechanism composed of the fixed rack 4, the mass side rack 5 and the pinion gear 6 is driven by the electric servo cylinder 7, and is easily assembled and adjusted. The vibration damping device is not transported as a finished product to the place where the vibration damping device is installed, but is transported in parts, and the vibration damping device can be assembled at the installation location.

  Further, since the movable mass 2 can be driven by amplifying the stroke distance due to the expansion / contraction operation of the cylinder device, the cylinder device having a short stroke length can be used, and the installation location of the vibration damping device Even if there are restrictions on transportation, such as forcing a currency in a narrow area such as a passage or an elevator when transporting to, it is possible to transport to the installation location.

  As described above, in the vibration damping device of the present invention, the actuator A as the drive unit is configured by the mechanism including the fixed rack 4, the mass side rack 5 and the pinion gear 6 and the cylinder device, so that alignment adjustment is easy. Therefore, the stroke length of the cylinder device can be shortened, the carrying-in to the installation place is easy, and the assembling work becomes very simple. Therefore, the vibration control device can be attached to the existing building.

  Further, since the actuator A is configured by the mechanism including the fixed rack 4, the mass side rack 5, and the pinion gear 6 and the cylinder device, alignment adjustment is easy and some dimensional errors are allowed. Can be divided into a rack-side gantry 1a provided with the above mechanism and a cylinder-side gantry 1b to which the cylinder device is fixed, and the division of the gantry 1 makes it easier to carry to the installation location, and more Damping devices can be applied to buildings.

  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 1a Rack side base 1b Cylinder side base 2 Movable mass 4 Fixed rack 5 Mass side rack 6 Pinion gear 7 Electric servo cylinder A cylinder actuator

Claims (2)

In a vibration damping device including a gantry, a movable mass that can reciprocate on the gantry, and an actuator that reciprocates the movable mass, the actuator is fixed to the gantry and follows a moving direction of the movable mass. A fixed rack; a mass-side rack fixed to the movable mass and facing the fixed rack; a pinion gear sandwiched between the fixed rack and the mass-side rack; and the pinion gear rotated at one end. A vibration damping device comprising: a telescopic cylinder device that is freely held and has the other end connected to the frame. 2. The vibration damping device according to claim 1, wherein the frame includes a rack-side frame to which the fixed rack is fixed and a cylinder-side frame to which the other end of the cylinder device is fixed.

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