JP5705618B2 - Vibration power generator - Google Patents

Description

  The present invention relates to a vibration power generator, and more particularly to a technique for efficiently converting vibration energy generated in a structure such as a bridge into electrical energy.

  2. Description of the Related Art Conventionally, several techniques for generating electric power by utilizing vibrations generated in structures such as bridges as vehicles pass are proposed.

  For example, in Patent Document 1 below, a piezoelectric element is provided on the surface of a flexible horizontal diaphragm that vibrates integrally with a crossover, and the piezoelectric element is deformed by the bending that occurs in the horizontal diaphragm due to the vibration of the overpass. The technology to do is described.

  In Patent Document 2 below, a linear generator is interposed between a bridge girder and an arch that supports the bridge girder, and the relative displacement in the vertical direction between a mover provided on the bridge girder and a stator provided on the arch is disclosed. The technology to generate electricity is described.

  Further, in Patent Document 3 below, the end of the bridge girder is supported by a spring, and the hydraulic oil is discharged from the cylinder by a piston that moves up and down integrally with the bridge girder to rotate the turbine, and the generator is driven by the rotation of the turbine. The technology to generate electricity is described.

JP 2010-15705 A JP 2009-243128 A Japanese Utility Model Publication No. 6-47672

However, the amplitude of vibration generated in a structure such as a bridge as the vehicle passes is not so large.
Accordingly, in the techniques described in Patent Documents 1 to 3 of the structure in which power is generated using vibration generated in a structure such as a bridge as it is, energy of vibration generated in the structure such as a bridge is efficiently used. Can not be converted into electrical energy.

  Accordingly, an object of the present invention is to provide a new vibration power generation apparatus that solves the above-described problems of the prior art and that can efficiently convert vibration energy generated in a structure such as a bridge as a vehicle passes into electric energy. It is to provide.

The means described in claim 1 for solving the above problem is as follows.
A vibration power generation device that converts vibration energy generated in a structure into electrical energy,
A weight body elastically supported by the structure that resonates with the vibration of the structure and moves greatly,
A driven body guided and supported by the structure so as to move up and down driven by the weight body;
A motion transmitting means for transmitting a vertical component of the motion of the weight to the driven body;
A conversion mechanism that converts the vertical motion of the driven body into a rotational motion;
A rotation speed multiplication mechanism for multiplying the rotation speed of the rotational motion generated by the conversion mechanism;
And a generator driven to rotate by the rotation speed multiplication mechanism.

That is, the vibration power generator according to claim 1 does not rotate the generator by converting the vertical motion of the structure such as the bridge itself into the rotational motion, but resonates with the vibration of the structure such as the bridge. It is a structure that converts the kinetic energy of a mass that moves greatly into electrical energy.
At this time, out of the kinetic energy of the weight that resonates greatly with the vibration of the structure, only the vertical movement component, in other words, the horizontal movement component is removed, and the driven body is driven to move up and down. To exercise.
As a result, since the horizontal motion component does not act on the mechanism that supports the vertical motion of the driven body, the vertical kinetic energy of the driven body is not lost due to friction or deformation.
Accordingly, vibration energy generated in a structure such as a bridge can be efficiently converted into electric energy.

The means described in claim 2 is the vibration power generator according to claim 1,
The conversion mechanism is wound around a pair of upper and lower first toothed pulleys rotatably supported by a pair of upper and lower horizontal support shafts extending in parallel with each other, and is wound around the pair of upper and lower first toothed pulleys. An endless first timing belt having a portion extending in the direction, and connection means for connecting the driven body to a portion extending in the vertical direction of the first timing belt.

That is, the conversion mechanism in the vibration power generator described in claim 2 connects the driven body to a portion extending in the vertical direction of the first timing belt wound around the pair of upper and lower first toothed pulleys. Structure.
As a result, when a portion extending in the vertical direction of the first timing belt moves up and down in conjunction with the vertical movement of the driven body, rotation in both forward and reverse directions is intermittently applied to the pair of upper and lower first toothed pulleys. Arise.
Further, even if intermittent vertical movement of the driven body is applied to a portion of the first timing belt that extends in the vertical direction, the teeth of the first timing belt and the teeth of the first toothed pulley are not affected. Since they are engaged with each other, no slip occurs between them, and the vertical movement of the driven body can be reliably converted into a rotational movement.

The means described in claim 3 is the vibration power generator according to claim 2,
A second toothed pulley having a larger diameter than the pair of upper and lower first toothed pulleys, wherein the rotation speed multiplication mechanism rotates integrally with one of the pair of upper and lower first toothed pulleys; It is wound around a third toothed pulley having a smaller diameter than the second toothed pulley, the second toothed pulley, and the third toothed pulley that rotate integrally with the drive shaft of the generator. And a second timing belt.

That is, the rotation speed multiplication mechanism in the vibration power generator described in claim 3 is configured to change the rotation speed of the rotational movement generated in the first toothed pulley to the second toothed pulley having a large diameter and the third diameter having a small diameter. It is a structure that is multiplied by a toothed pulley.
An endless second timing belt is wound around the second toothed pulley and the third toothed pulley.
As a result, even if the intermittent rotational motion in both the forward and reverse directions generated in the first toothed pulley is multiplied by this rotational speed multiplication mechanism, the teeth of the second and third toothed pulleys and the second There is no slippage between the two due to the engagement with the teeth of the timing belt.
Accordingly, the generator can be driven by reliably multiplying the rotational speed of the intermittent rotational motion generated in the forward and reverse directions generated in the first toothed pulley.

  According to a fourth aspect of the present invention, there is provided the vibration power generating apparatus according to any one of the first to third aspects, wherein the motion transmitting means includes a first spherical bearing connected to the weight, and the covered member. A second spherical bearing connected to the driving body; and a rod extending in a vertical direction between the first spherical bearing and the second spherical bearing.

That is, since the weight body is elastically supported on the structure, the motion includes a motion component in the horizontal direction.
At this time, if the weight body and the driven body are directly connected by a single rod that is a rigid body, the horizontal movement component included in the movement of the weight body is transmitted to the driven body as it is, and the upper and lower sides of the driven body are Friction occurs in the direction guide support, resulting in loss of kinetic energy.
In this case, the transmission means in the vibration power generator described in claim 4 has a structure in which the first spherical bearing connected to the weight body and the second spherical bearing connected to the driven body are connected by a rod extending in the vertical direction. It is.
Accordingly, the horizontal movement included in the movement of the weight body is blocked by the sliding action in the first and second spherical bearings and is not transmitted to the driven body.
Therefore, useless friction acts on the vertical guide support of the driven body, and no loss of kinetic energy of the driven body occurs.

According to a fifth aspect of the present invention, in the vibration power generation apparatus according to any one of the first to fourth aspects, the generator is a stepping motor.
That is, when a stepping motor is used as a generator, power can be reliably generated even by a slight rotation of the third toothed pulley due to its structure.
Thereby, the energy of the vibration which has arisen in structures, such as a bridge, can be efficiently converted into electrical energy.

According to a sixth aspect of the present invention, there is provided the vibration power generator according to any one of the first to fifth aspects, wherein the weight body is a component part of a dynamic vibration absorber that controls vibration generated in the structure. It is characterized by being.
That is, a structure such as a bridge may be provided with a dynamic mass damper (TMD) for damping the vibration.
In this case, the vibration power generation device of the present invention can utilize the weight body of the dynamic vibration absorber as a kinetic energy supply source, so that the number of components can be reduced and the manufacturing cost can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration electric power generating apparatus which can convert the energy of the vibration which has arisen in structures, such as a bridge, into an electrical energy efficiently can be provided.

The front view which shows the vibration electric power generating apparatus of one Embodiment. The top view of the vibration electric power generating apparatus shown in FIG. The right view of the vibration electric power generating apparatus shown in FIG. Sectional drawing along the AA fracture | rupture line in FIG. Sectional drawing along the BB fracture line in FIG.

Hereinafter, with reference to FIG. 1 thru | or FIG. 5, one Embodiment of the vibration electric power generating apparatus of this invention is described in detail.
In the following description, the vertical direction is the up-down direction, the direction in which the structure such as a bridge extends (the left-right direction shown in the front view of FIG. 1) is the left-right direction, and the direction perpendicular to these two directions (see FIG. The vertical direction in the plan view of FIG.

  First, referring to FIG. 1 and FIG. 2, the vibration power generation apparatus 100 of this embodiment includes a pair of front and rear base plates 1, 1 fixed on a structure S such as a bridge, and these base plates 1, 1. And a dynamic vibration absorber (TMD) 10 that is stretched in the front-rear direction.

The dynamic vibration absorber (TMD) 10 elastically supports a thick steel plate 14 to which a weight body 13 is fixed by a total of 16 coil springs 12 on a gantry composed of a pair of left and right I-shaped steels 11 and 11 extending in the front-rear direction. It has a supported structure.
As a result, the weight 13 resonates with the vibration generated in the structure S such as a bridge and moves greatly.

  On the other hand, at both the left and right ends of the dynamic vibration absorber 10, a driven body support mechanism 20, a conversion mechanism 30, a rotation speed multiplication mechanism 40, and a generator 50 are provided in parallel.

As shown in FIG. 3, the driven body support mechanism 20 includes a substrate 2 that extends between the pair of front and rear base plates 1, 1 and extends in the front-rear direction, and is vertically mounted on the substrate 2. And a pair of front and rear guide shafts 21 and 21 extending in the direction.
Linear bushings 22 and 22 are fitted on the guide shafts 21 and 21 so as to be slidable in the vertical direction, and the driven body 23 is guided and supported so as to be able to smoothly reciprocate in the vertical direction.
The driven body 23 is a member formed in a substantially U shape from a thick steel plate, and is connected to the dynamic vibration absorber 10 by a rod (motion transmission means) 25, and in the vertical direction in conjunction with the vertical movement of the weight body 13. Exercise.

The rod 25 includes a first spherical bearing 26, a second spherical bearing 27, and a rod body 28 that extends in the vertical direction between the spherical bearings 26 and 27.
The first spherical bearing 26 is fixed to brackets 16 fixed to both left and right ends of the thick plate 14 supporting the weight body 13, and the second spherical bearing 27 is fixed to the driven body 27. Has been.
Both ends of the rod body 28 are screwed to the spherical bearings 26 and 27, respectively.

The conversion mechanism 30 converts the vertical motion of the driven body 23 into a rotational motion, a pair of left and right support plates 31, 31 that are suspended from the substrate 2 and extend parallel to each other, and these support plates 31. , 31 and a pair of upper and lower horizontal support shafts 32, 33 extending in the left-right direction parallel to each other.
The upper first toothed pulley 34 is rotatably supported by the upper horizontal support shaft 32, and the lower first toothed pulley 35 is rotatably supported by the lower horizontal support shaft 33. An endless first timing belt 36 is wound around the first toothed pulleys 34 and 35.
A rear end portion of the driven body 23 is connected to a portion of the first timing belt 36 that extends in the vertical direction between the first toothed pulleys 34 and 35 by a connection fitting (connection means) 37. Yes.
As a result, when the driven member 23 moves in the vertical direction, the portion of the first timing belt 36 extending in the vertical direction also moves in the vertical direction, so that the first toothed pulleys 34 and 35 move in both the forward and reverse directions. Rotates intermittently.

The rotation speed multiplication mechanism 40 multiplies the rotation speed of the rotational movement of the first toothed pulley 34 and transmits it to the generator 50, has a larger diameter than the first toothed pulley 34, and has a first diameter. The second toothed pulley 41 rotates integrally with the one toothed pulley 34.
Further, as shown in FIG. 5, a pair of left and right support plates 42 and 42 are vertically suspended on a small substrate 3 which is superimposed and fixed on the substrate 2, and a horizontal support shaft 43 extending in the left-right direction is provided. It is supported rotatably.
A third toothed pulley 44 is fixed to the tip of the horizontal support shaft 43 so as to rotate integrally.
The diameter of the third toothed pulley 44 is considerably smaller than that of the second toothed pulley 41.
An endless second timing belt 45 is wound around the second and third toothed pulleys 41 and 44.
As a result, the third toothed pulley 44 rotates at a rotational speed significantly higher than the rotational speed of the second toothed pulley 41, and thus the first toothed pulley 34.

The generator 50 is fixed on the substrate 3, and the rotation shaft thereof is connected to the horizontal support shaft 43 of the rotation speed multiplication mechanism 40 through the coupling 51.
As a result, when the third toothed pulley 44 rotates, the rotating shaft of the generator 50 rotates integrally, and the generator 50 generates electrical energy.
The generator 50 is composed of a PM stepping motor, and generates an electromotive force with a high voltage reaching several volts even when the rotation speed of the third toothed pulley 44 is low.
Further, the electrical energy generated by the generator 50 is stored in a power storage means (not shown), and then used for lighting a structure such as a bridge.

  Next, the operation of the vibration power generation apparatus 100 of the present embodiment described above will be described.

When the vehicle passes over the structure S such as a bridge, vibrations in the vertical direction are generated in the structure S.
Then, the weight body 13 of the dynamic vibration absorber 10 resonates with the vibration of the structure S and moves greatly.

On the other hand, the driven body 23 is connected to the weight body 13 via the rod 25, the bracket 16 of the dynamic vibration absorber 10, and the thick plate 14.
Thereby, when the weight body 13 moves greatly, the driven body 23 also moves greatly in conjunction therewith.

However, the rod 25 is provided with first and second spherical bearings 26 and 27.
Thereby, the horizontal movement included in the large movement of the weight body 13 is blocked by the sliding action of the first and second spherical bearings 26 and 27 and is not transmitted to the driven body 23.
Then, the guide shafts 21 and 21 and the linear bushings 22 and 22 that guide and support the smooth vertical movement of the driven body 23 are pushed in the horizontal direction due to the horizontal movement of the weight body 13. Never happen.
Accordingly, useless friction acts between the guide shafts 21 and 21 and the linear bushes 22 and 22, and the kinetic energy in the vertical direction of the driven body 23 is not lost.

On the other hand, the energy of the vertical motion of the driven body 23 is converted into rotational energy by the conversion mechanism 30.
At this time, the first toothed pulleys 34 and 35 constituting the conversion mechanism 30 and the first timing belt 36 are engaged with each other.
Thus, no slip occurs between them, and the vertical kinetic energy of the driven body 23 can be reliably converted into rotational energy.

Similarly, the large-diameter second toothed pulley 41 and the small-diameter third toothed pulley 44 and the second timing belt 45 that constitute the rotation speed multiplication mechanism 40 are engaged with each other.
Thus, no slip occurs between them, and the generator 50 is driven by reliably multiplying the rotational speed of the intermittent rotational motion generated in the forward and reverse directions generated in the second toothed pulley 41. Can do.

  Furthermore, since the generator 50 is composed of a stepping motor, the slight rotation of the third toothed pulley 44 can be reliably converted into electric energy.

That is, the vibration power generation apparatus 100 of this embodiment does not rotate the generator 50 by converting the vertical motion of the structure S itself such as a bridge into a rotational motion, but resonates with the vibration of the structure S such as a bridge. Thus, the kinetic energy of the weight 13 that moves greatly is converted into electric energy.
Further, only the vertical motion component of the kinetic energy of the weight 13, in other words, the horizontal motion component is removed, and the driven body 23 is driven to move in the vertical direction.
As a result, the driven body support mechanism 20 that guides and supports the vertical movement of the driven body 23 is pushed in the horizontal direction, and friction, deformation, or the like does not occur between the components. The kinetic energy in the vertical direction of the driven body 23 is not lost.
Therefore, according to the vibration power generation apparatus 100 of the present embodiment, the energy of vibration generated in the structure S such as a bridge can be efficiently converted into electric energy.

Furthermore, the vibration power generation apparatus 100 of the present embodiment includes a dynamic vibration absorber (TMD) 10, a driven body support mechanism 20, A rod (motion transmission means) 25, a conversion mechanism 30, a rotation speed multiplication mechanism 40, and a generator 50 are each integrally arranged in parallel.
That is, the energy path from the weight body 13 that resonates greatly with the vibration of the structure S such as a bridge to the power generation mechanism is completed within the vibration power generation apparatus 100.
As a result, the vibration power generation apparatus 100 according to the present embodiment does not need to be supported by another structure unlike the apparatuses described in Patent Document 2 and Patent Document 3 described above. It can be installed freely at any location.

As mentioned above, although one embodiment of the vibration electric power generating apparatus of this invention was described in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible.
For example, in the above-described embodiment, by utilizing the weight 13 of the dynamic vibration absorber 10 that moves in accordance with the vibration of the structure S such as a bridge, the number of components can be reduced and the manufacturing cost can be reduced. I am trying.
On the other hand, a more efficient vibration power generation can be achieved by configuring the vibration power generation apparatus using a dedicated weight body.

S Structure 1 Substrate 2 Substrate 3 Substrate 10 Dynamic Vibration Absorber 12 Coil Spring 13 Weight 14 Thick Plate 16 Bracket 20 Driven Body Support Mechanism 21 Guide Shaft 22 Linear Bushing 23 Driven Body 25 Rod (Motion Transmission Means)
26 First spherical bearing 27 Second spherical bearing 28 Rod body 30 Conversion mechanism 31 Support plate 32, 33 Horizontal support shaft 34, 35 First toothed pulley 36 First timing belt 40 Rotation speed multiplication mechanism 41 First 2 toothed pulley 42 support plate 43 horizontal support shaft 44 3rd toothed pulley 45 second timing belt 50 generator 51 coupling 100 vibration power generator of one embodiment

Claims (6)

A vibration power generation device that converts vibration energy generated in a structure into electrical energy,
Elastically supported by the structure, which resonates with the vibration of the structure and moves greatly .
A weight body constituting a dynamic vibration absorber ;
A driven body guided and supported by the structure so as to move up and down driven by the weight body;
A motion transmitting means for transmitting a vertical component of the motion of the weight to the driven body;
A conversion mechanism that converts the vertical motion of the driven body into a rotational motion;
A rotation speed multiplication mechanism for multiplying the rotation speed of the rotational motion generated by the conversion mechanism;
A generator driven to rotate by the rotation speed multiplication mechanism;
Equipped with a,
The dynamic vibration absorber, the driven body, the motion transmission means, the conversion mechanism, the rotation speed multiplying mechanism, and the generator are integrally arranged in parallel so as to be freely installed on the structure. > A vibration power generator characterized by that. The conversion mechanism is
A pair of upper and lower first toothed pulleys rotatably supported by a pair of upper and lower horizontal support shafts extending in parallel with each other;
An endless first timing belt wound around the pair of upper and lower first toothed pulleys and having a portion extending in the vertical direction;
Connection means for connecting the driven body to a portion extending in the vertical direction of the first timing belt;
The vibration power generation apparatus according to claim 1, comprising: The rotation speed multiplication mechanism is
A second toothed pulley having a larger diameter than the pair of upper and lower first toothed pulleys rotating integrally with one of the pair of upper and lower first toothed pulleys;
A third toothed pulley having a smaller diameter than the second toothed pulley rotating integrally with the drive shaft of the generator;
A second timing belt wound around the second toothed pulley and the third toothed pulley;
The vibration power generation apparatus according to claim 2, wherein: The movement transmitting means is
A first spherical bearing connected to the weight;
A second spherical bearing connected to the driven body;
4. The vibration power generator according to claim 1, further comprising a rod extending in a vertical direction between the first spherical bearing and the second spherical bearing. 5.   The vibration power generator according to any one of claims 1 to 4, wherein the generator is a stepping motor.   6. The vibration power generator according to claim 1, wherein the weight body is a component of a dynamic vibration absorber that suppresses vibration generated in the structure. 7.

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