JP6853571B2 - Power supply system - Google Patents

Description

The present invention relates to a power supply system.

Conventionally, a technique for supplying electric power by electric field coupling has been published (see, for example, Patent Document 1), and the applicant also uses electric power transmission means between bearings and transmission rails as electric power transmission means in mechanical elements. We have already proposed a power transmission means between the body and the body (for example, refer to Patent Documents 2 to 5 for the power transmission means between the bearings).

Japanese Unexamined Patent Publication No. 2015-099880 JP 2015-154577 JP-A-2014-147203 and drawings Japanese Patent Application Laid-Open No. 2015-09491 and drawings Japanese Patent Application Laid-Open No. 2016-031312 and drawings

However, conventionally, including Patent Documents 1 to 5, a method of supplying electric power to a mechanical element using a gear via a gear has not been proposed.

The present invention has been made in view of such a situation, and an object of the present invention is to supply electric power to a mechanical element using gears via gears.

In order to achieve the above object, the power supply system of one aspect of the present invention is
A power supply system that applies electric field-coupled power transmission technology.
A power transmission unit that transmits power from an AC power source of a predetermined wavelength,
It has a power receiving electrode, and a portion of the power transmission unit facing the power receiving electrode is used as a power transmission electrode, and power is received from the power transmission unit via a plurality of junction capacities formed by the power transmission electrode and the power receiving electrode. And the power receiving part that supplies the load
With
The power receiving electrode is formed of a gear member of a conductor.
The power transmission unit has irregularities corresponding to the teeth of the gear member, and is arranged so as to mesh with the teeth.

Further, the teeth of the gear member may be composed of a plurality of plate-shaped members radially extending from the vicinity of the central portion of the gear member, and an elastic body may be filled between the adjacent plate-shaped members. it can.

Further, the gear member and the conductor arranged so as to cover the power transmission unit are further provided.
Electric power can be transmitted from the power transmission unit to the power reception unit via a plurality of junction capacitances formed by at least one of the power transmission electrode and the power reception electrode and the conductor.

Further, the power transmission electrode is formed of a gear member of a conductor.
The power receiving portion has irregularities corresponding to the teeth of the gear member, and can be arranged so as to mesh with the teeth.

Further, in order to achieve the above object, the power supply system of one aspect of the present invention is
A power supply system that applies electric field-coupled power transmission technology.
A power transmission unit that transmits power from an AC power source of a predetermined wavelength,
It has a power receiving electrode, and a portion of the power transmission unit facing the power receiving electrode is used as a power transmission electrode, and power is received from the power transmission unit via a plurality of junction capacities formed by the power transmission electrode and the power receiving electrode. And the power receiving part that supplies the load
With
The power receiving electrode is formed of a pulley of a conductor.
The power transmission unit may be a timing belt having irregularities corresponding to the teeth of the pulley and arranged so as to mesh with the teeth.

According to the present invention, it is possible to supply electric power to a mechanical element using gears via gears.

It is a circuit diagram which shows that the junction capacitance is formed by the facing electrode pair in the power transmission circuit which applied the electric field coupling power transmission technique. It is an image diagram which shows the state of power transmission in each situation between metal which becomes an electrode, and is the equivalent circuit diagram in each situation. It is a figure which shows the state of the electric field energy stored between the meshing gears. It is a figure which shows the example of the case where electric power is transmitted through a gear among the electric power transmission circuits to which an electric field coupling electric power transmission technique is applied. It is a figure which shows the joint capacity formed when a conductive cover is put on a rack gear and a pinion gear. It is a figure which shows the example of the case where the electric power transmission and communication are realized by the electric field coupling technology by incorporating the mesh electrode made of the metal mesh and the conductive wire inside the timing belt. It is a figure which shows the positional relationship between a timing belt and a pulley. It is a figure which shows the example of the case where the timing belt is meshed with the pulley provided with the flange. It is an image diagram which shows the structure in the case where the power transmission or communication is performed using two sets of timing belts and pulleys. It is a figure which shows the structure when the power supply system of this invention is applied to a linear drive system. It is a figure which shows the structure when the power supply system of this invention is applied to the linear drive system which has a curved part. It is a figure which shows the structure in the case of using 2 rack gears and a differential gear in order to apply the power supply system of this invention to a linear drive system which has a curved part. It is a figure which shows the example of the case where the power supply system of this invention is applied to the multi-directional drive device which is a prior art. It is sectional drawing which shows the structure when the power supply system of this invention is applied to the multi-directional drive device of FIG. It is a figure which shows an example which used the high frequency detection switch. As an example of a power supply system using a high frequency detection switch, it is a cross-sectional configuration diagram showing an example different from FIG. It is sectional drawing which shows the example of the power supply system using the light detection switch.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram showing that a junction capacitance Cc is formed by opposing electrode pairs in a power transmission circuit to which an electric field coupling power transmission technique is applied.

As shown in FIG. 1, a power transmission circuit to which an electric field-coupled power transmission technique is applied includes a power transmission unit 1 and a power reception unit 2.
Here, the electric field-coupled power transmission technique is a technique for realizing non-contact power transmission by passing a high-frequency current in a state where a junction capacitance Cc is formed by a pair of electrodes made of opposing metal plates.
That is, a metal plate transmission electrode 12 is attached to the end of the transmission unit 1 that transmits electric power from the AC power source Vf, and a metal plate power receiving electrode 22 is attached to the tip of the power receiving unit 2 that receives the electric power and supplies the electric power to the load R. By arranging them facing each other, a junction capacitance Cc is formed, and an electric field coupling power transmission technique is realized.

The power transmission unit 1 includes a parallel resonance circuit 11, a power transmission electrode 12, and a transformer T1. Since the AC power supply Vf is connected to the power transmission unit 1, the power transmission unit 1 can receive power from here.
The parallel resonant circuit 11 includes a capacitor C1 and a coil L2. An AC power supply Vf is connected to the parallel resonant circuit 11 via a transformer T1. That is, the parallel resonance circuit 11 is configured by connecting the capacitor C1 and the coil L2 in parallel with each other.
Further, the transformer T1 is configured by adopting the coil L1 as the primary winding and the coil L2 as the secondary winding.
Here, the ratio of the number of windings of the coil L1 to the number of windings of the coil L2 is 1: n. Therefore, the voltage on the primary side, that is, the voltage of the AC power supply Vf is boosted n times in the transformer T1 and applied to the parallel resonant circuit 11.
Further, power transmission electrodes 12 are connected to both ends of the parallel resonance circuit 11.

The power receiving unit 2 includes a parallel resonant circuit 21, a power receiving electrode 22, and a transformer T2.
The parallel resonant circuit 21 includes a capacitor C2 and a coil L3. The power receiving electrode 22 of the power receiving unit 2 is connected to the parallel resonant circuit 21. That is, the parallel resonance circuit 21 is configured by connecting the capacitor C2 and the coil L3 in parallel with each other.
Further, the transformer T2 is configured by adopting the coil L3 as the primary winding and the coil L4 as the secondary winding.
Here, the ratio of the number of windings of the coil L3 to the number of windings of the coil L4 is n: 1. Therefore, the voltage on the primary side, that is, the voltage received by the power receiving unit 2 and applied to the parallel resonant circuit 21, is stepped down by 1 / n times in the transformer T2 and applied to the load R.
The electric field coupled power transmission technology is realized by the above configuration.

Next, power transmission at the junction interface of the metal to be the electrode will be described.
FIG. 2 is an image diagram showing a state of power transmission between various situations between the metals used as electrodes, and an equivalent circuit diagram for each situation.
FIG. 2A is an image diagram and an equivalent circuit diagram showing a state in which a rigid metal is opposed as an electrode and a direct current is applied.
Gears used in machine elements are generally made of rigid metal. As described above, when the gear is made of a rigid metal, as shown in FIG. 2A, even if the gear is precision-polished, the portions where the gears mesh with each other are in point contact. Therefore, when a direct current is passed through the circuit, the conductive current indicated by the broken line arrow is concentrated on the portion in point contact. Therefore, the point contact portion is heated, and the metal atom migrates or oxidizes. Further, heating may weld the point-contacted portion, and the movement may damage the surface.

However, as shown in FIG. 2B, when a high-frequency current is passed through the circuit, the ratio of the mutated current indicated by the solid line arrow to the conductive current indicated by the broken line arrow becomes large. In particular, in the vicinity of the point contact portion, the distance between the metals becomes extremely short, so that the junction capacitance increases and the mutation current increases. Therefore, the current does not concentrate on the point contact portion.
Further, as shown in FIG. 2C, the conductive current is cut off by coating the metal interface with DLC (Diamond Like Carbon), a hard alumite layer, or the like as the insulating layer I so that only the displacement current indicated by the solid line arrow is used. Can be done. In this state, the equivalent circuit has only capacitance. Even if DLC is used for coating the cylinder and piston of an engine, it has an effect of improving slipperiness and the like, and therefore has resistance to use in a harsh environment. Further, even if DLC is used for a gear system such as a rack gear and a pinion gear, it has a certain degree of resistance unless it is used under extremely harsh conditions.

Further, as shown in FIG. 2D, in the worst case, the insulating layer of the convex portion may be scraped off and the metal may appear. Even in this case, the insulating layer I remains around the metal contacts. At this time, even if the material used as the insulating layer is DLC or hard alumite, the dielectric constant is higher than that of air, so that the bonding capacitance is larger than the conductive current indicated by the broken line arrow. The displacement current indicated by the solid arrow is dominant. In the example of FIG. 2D, the insulating layer I is coated only on one metal, but when the insulating layer I is also coated on the other surface, when the electrodes are moving, the ratio of the metal contacts facing each other is Extremely low. In this regard, since the DLC has high slidability between the DLCs, both the opposing metals can be coated with the insulating layer I.

Under the above conditions, a method of providing a power transmission function by coating a DLC film as an insulating layer I on the surface where the meshing gears are in contact with each other will be examined.
FIG. 3 is a diagram showing the state of the electric field energy stored between the meshing gears.

Whenever the gears mesh, the force is transmitted at the contacts. Therefore, as shown in FIG. 3A, when the insulating layer I is coated on both the surfaces of the rack gear 31 and the pinion gear 41 that meshes with the rack gear 31, the portion near where the rack gear 31 and the pinion gear 41 mesh with each other. Then, a weak electric field area E1 is generated. Further, as shown in FIG. 3B, in the portion where the rack gear 31 and the pinion gear 41 mesh with each other, the two are in an extremely close state, so that a strong electric field area E2 is generated. Further, since the rack gear 31 and the pinion gear 41 are both gears, their respective ends are in a state of being meshed with each other as gear teeth. Therefore, the area of the portion where the rack gear 31 and the pinion gear 41 come into contact with each other becomes large, and the joint capacitance can be formed widely in this portion.

Next, a state in which electric power is transmitted via gears will be described.
FIG. 4 is a diagram showing an example of a power transmission circuit to which the electric field coupling power transmission technique is applied in which power is transmitted via gears.

As shown in FIG. 4A, the electric power output from the high frequency power supply Vf connected to the rack gear 31 is supplied to the load R connected to the bearing 51 via the pinion gear 41. In this case, since the load is arranged on the carrier body conveyed by the drive of the pinion gear 41, the joint capacitance Cc is formed in the gear portion 3 and the junction capacitance Cr is the bearing portion as shown in FIG. 4B. It is formed in 4 and is connected in series. At this time, by replacing the bearing portion 4 side with a slip ring (not shown), the junction capacitance Cr can be formed in one place. However, in this case, the joint capacity becomes small because problems such as power wear occur at the contact portion between the slip ring on the rotating side and the brush on the fixed side.

Next, a case where the rack gear 31 and the pinion gear 41 are covered with the conductive cover 43 will be described.
FIG. 5 is a diagram showing the joint capacitance formed when the rack gear 31 and the pinion gear 41 are covered with the conductive cover 43.

FIG. 5A is a cross-sectional view of the rack gear 31 and the pinion gear 41 when the conductive cover 43 is covered with the rack gear 31 as viewed from the side surface side of the rack gear 31.
FIG. 5B is a cross-sectional view of the rack gear 31 and the pinion gear 41 when the conductive cover 43 is covered with the rack gear 31 as viewed from the longitudinal direction of the rack gear 31.

As shown in FIG. 5A, by covering the conductive cover 43 so as to surround the rack gear 31 and the pinion gear 41, the conductive cover 43 has a joint capacitance Cc1 formed between the rack gear 31 and the pinion gear 41 and the rack gear 31. The joint capacitance Cc2 formed between the pinion gear 41 and itself and the junction capacitance Cc3 formed between the pinion gear 41 and itself are integrated. Further, as shown in FIG. 5B, the conductive cover 43 also integrates the bonding capacitance Cc4 formed between the rotating shaft 52 and the bonding capacitance Cc4 formed between the rotating shaft 52 and itself. In this way, the conductive cover 43 can increase the bonding capacitance.

Further, since the conductive cover 43 is arranged so as to physically surround the rack gear 31 and the pinion gear 41, it is possible to reduce the amount of electromagnetic energy (not shown) radiated to the outside generated by the junction capacitances Cc1 to Cc3. It also functions as a wall.
The conductive cover 43 also functions as a power receiving electrode for transmitting power to the load R (see FIG. 4).
Further, the joint capacity can be further increased by arranging a plurality of pinion gears 41 and then covering the entire rack gear 31 and the plurality of pinion gears 41 with the conductive cover 43. In this case, the plurality of pinion gears 41 arranged are not necessarily connected to the drive system.

Further, in FIGS. 4 and 5, the high frequency power supply Vf is connected to the rack gear 31, and the load R is connected to the pinion gear 41 via the bearing 51, but the configuration is not limited to this. A high-frequency power supply Vf may be connected to the pinion gear 41 via a bearing 51, and a load R may be connected to the rack gear 31. That is, the electric power may be transmitted from the rack gear 31 side to the pinion gear 41 side, or the electric power may be transmitted from the pinion gear 41 side to the rack gear 31 side.

Further, in FIGS. 4 and 5, as an example of electric power transmission between gears, the transmission of electric power between the rack gear 31 and the pinion gear 41 has been described as an example, but the present invention is not limited to this example. For example, it may be a combination of a plurality of spur gears. In this case, the joint capacity formed on the surfaces of the spur gear teeth facing each other and the joint capacity formed between the conductive cover covering the entire spur gear and the spur gear should be used for electric power transmission. Can be done. Further, the power supply system of the present invention can be applied to all other types of gears such as worm gears, high void gears, worm rack gears (manufactured by Kamo Seiko Co., Ltd.), bevel gears, and cap feather gears.
Further, the power supply system of the present invention can also be applied to a system using a gear having a chain connected and a belt having a conductive mesh built therein. Further, a belt crawler (manufactured by Kamo Seiko Co., Ltd.) woven with conductive fibers can be used to increase the bonding capacity.

FIG. 6 is a diagram showing an example in which power transmission and communication are realized by electric field coupling technology by incorporating a mesh electrode 303 made of a metal mesh and a conductive wire 304 inside the timing belt 32. Is.

As shown in FIG. 6, the timing belt 32 is a belt made of an elastic body 301 having an uneven portion for engaging with the pulley 42 shown in FIG. 7 described later. The material of the elastic body 301 is not particularly limited, but for example, chloroprene rubber or the like can be adopted.
The surface of the concavo-convex portion of the elastic body 301 is covered with the tooth cloth 302, and the mesh electrode 303 is incorporated in the vicinity of the concavo-convex portion of the elastic body 301 in a state of being entangled with the elastic body 301. ing. The mesh electrode 303 may be integrated with the tooth cloth 302 without being incorporated into the elastic body 301.

Further, a conductive wire 304 and a tension body 305 are also incorporated inside the elastic body 301. The conductive wire 304 is made of a material having strong bendability. The conductive wire 304 may be a stranded wire obtained by twisting a plurality of conductors. The tension body 305 is composed of a member capable of providing sufficient resistance to the longitudinal extension of the timing belt 32. For the tension body 305, a member made of a material having a relatively small elongation, such as a steel cable, can be adopted. The conductive wire 304 can also function as the tension body 305.

The mesh electrode 303 and the conductive wire 304 are conductive at the contact portion 306 by contact or capacitive coupling. Here, the important role of the mesh electrode 303 is to establish conduction between the conductive wire 304 and the pulley 42 shown in FIG. 7, which will be described later, to form a junction capacitance. Therefore, the mesh electrode 303 does not necessarily have to be a continuous body, but since it has the effect of reinforcing the elastic body 301 by being entangled with the elastic body 301, the continuous body has the effect of reinforcing the elastic body 301. It gets higher.
Further, in FIG. 6, one mesh electrode 303 is arranged on one timing belt 32, but the mesh electrode 303 arranged on the timing belt 32 is not limited to one, and a plurality of mesh electrodes 303 are arranged. May be good. When a plurality of mesh electrodes 303 are arranged, it is necessary to prepare independent conductive wires 304 for each mesh electrode 303. In particular, when communication is realized by the electric field coupling technique, the mesh electrodes 303 may be composed of two parallel threads in consideration of the characteristic impedance.

FIG. 7 is a diagram showing the positional relationship between the timing belt 32 and the pulley 42 of FIG.

As shown in FIG. 7, when the timing belt 32 and the pulley 42 are meshed with each other, the area of the contact portion thereof is larger than the area of the contact portion between the gears shown in FIGS. 4 and 5. That is, when the timing belt 32 and the pulley 42 are brought into contact with each other, the joining capacity is increased because they are in contact with each other at a portion of about half or more of the outer circumference of the pulley 42, as in the case of contacting the chain and the gear. Is suitable for. Further, since the timing belt 32 and the pulley 42 are in close contact with each other, this property is also suitable for increasing the joint capacitance.
Further, when the timing belt 32 and the pulley 42 are brought into contact with each other, the depth (belt width) can be increased, unlike the case of the chain and the gear. Therefore, the bonding capacity can be further increased.

Further, when the timing belt 32 and the pulley 42 are brought into contact with each other, a flange (flange) 43 may be attached to the pulley 42.
FIG. 8 is a diagram showing an example in which the timing belt 32 is meshed with the pulley 42 provided with the flange.

As shown in FIG. 8, when the timing belt 32 is meshed with the pulley provided with the flange 50, the side surface of the timing belt 32 and the flange 50 come into contact with each other, so that the joining capacity can be further increased. In this case, the mesh electrode 303 (not shown) incorporated in the timing belt 32 has a configuration extending to the side surface of the timing belt so that it can come into contact with the flange 50.

Next, a configuration when power transmission or communication is performed between the timing belt 32 and the rotating shaft 52 via the pulley 42 will be described.
FIG. 9 is an image diagram showing a configuration when power transmission or communication is performed using two sets of the timing belt 32 and the pulley 42 of FIGS. 7 and 8.

FIG. 9A is a cross-sectional view showing a configuration in which the timing belt 32a is meshed with the pulley 42a fixed to the rotating shaft 52, and the pulley 42b and the timing belt 32b are further attached to the pulley 42b via the insulating layer I.
As shown in FIG. 9A, power transmission electrodes 12 are attached to both side surfaces of the pulley 42a and the pulley 42b by contact or capacitive coupling. A high frequency power supply Vf is connected to the power transmission electrode 12. In this case, the timing belts 32a and 32b are on the power receiving electrode 22 side.
In this way, using the two sets of timing belts 32 (timing belts 32a and 32b) and the pulleys 42 (pulleys 42a and 42b), power and communication signals can be sent to each of the timing belts 32a and 32b. ..

FIG. 9A shows a configuration in which the power transmission electrodes 12 are attached to both side surfaces of the pulley 42a and the pulley 42b, but the power receiving electrodes 22 instead of the power transmission electrodes 12 are attached to both side surfaces of the pulley 42a and the pulley 42b. Can also be installed.
FIG. 9B shows a configuration in which the power receiving electrode 22 is attached to both side surfaces of the pulley 42a and the pulley 42b by contact or capacitive coupling. In this case, the timing belts 32a and 32b are on the power transmission side. In this case, power and communication signals can be sent to the load R on the power receiving side.

FIG. 9C shows a configuration when the load R is present on the rotating shaft 52.
In this case, as shown in FIG. 9C, a coaxial shaft is adopted as the rotating shaft 52, the pulley 42a is fixed to the outer conductor 501, and the pulley 42b is fixed to the inner conductor 502. As a result, electric power and communication signals can be passed through the rotating shaft 52. To take out the electric power and the communication signal, the electric power and the communication signal can be taken out as the voltage between the outer conductor 501 and the inner conductor 502 by opening the through hole H in the outer conductor 501 of the rotating shaft 52.
FIG. 9D is a cross-sectional view showing a configuration when the profile 61 is attached to the plurality of timing belts 32. In this case, by providing the power receiving electrode 22 in the profile 61, it is possible to provide a power receiving function and a communication function by electric field coupling. For example, a sensor may be provided on the profile 61 as a load R so that the conveyed body on the timing belt 32 can be detected. For the profile 61, "Hamepatchin" (registered trademark) or the like can be adopted.

Next, a case where the power supply system of the present invention is applied to a linear drive system will be described.
FIG. 10 is a diagram showing a configuration when the power supply system of the present invention is applied to a linear drive system.

When the power supply system of the present invention is applied to a linear drive system, power is supplied to the external electrode 24 by using one of the two-wire power transmission circuits as the rack gear 31 and the other as the feather touch electrode 23. It will be transmitted.
FIG. 10A is a cross-sectional view of a linear drive system to which the power supply system of the present invention is applied as viewed from the side.
As shown in FIG. 10A, in the linear drive system to which the power supply system of the present invention is applied, the rack gear 31 meshed with the pinion gear 41 and the external electrode 24 are arranged so as to sandwich the insulating layer I. A connector 71 for inputting electric power output from a high-frequency power source is arranged at a predetermined portion of the external electrode 24, but a transmission line 76 extending from the bottom of the connector 71 is provided on the external electrode 24. It is connected to the rack gear 31 through the through hole and the insulating layer I. Therefore, the electric power output from the high-frequency power supply is input to the rack gear 31 via the connector 71 and the transmission line 76.

10B and 10C are cross-sectional views of a linear drive system to which the power supply system of the present invention is applied as viewed from the longitudinal direction.
As shown in FIGS. 10B and 10C, the external electrode 24 is composed of a hollow substantially quadrangular prism-shaped member having an opening at the bottom. The material of the external electrode 24 is not particularly limited. For example, it can be made of an extruded material made of aluminum.
Since the inside of the external electrode 24 is hollow, a moving body that can be arbitrarily moved in the longitudinal direction of the external electrode 24 can be arranged inside the external electrode 24. This mobile body includes a pinion gear 41, a rotating shaft 52, a slide bearing 53, a feather touch electrode 23, a body 73, a guide wheel 74, and an ANT (ultra-low power consumption wireless) unit 75.
Further, a rack gear 31, an insulating layer I, and a communication line L are arranged on the inner side of the external electrode 24. The rack gear 31 and the external electrode 24 are separated by sandwiching the insulating layer I. Further, the communication line L is surrounded by the external electrode 24 and the shield metal foil 72. As a result, electromagnetic wave radiation is reduced, so that distance attenuation can be reduced.

In the moving body arranged inside the external electrode 24, the pinion gear 41 and the rotating shaft 52 are held by two slide bearings 53. As a result, a junction capacitance is formed between the slide bearing 53 as the power receiving electrode and the rack gear 31 as the power transmission electrode, so that the electric power taken out from the rack gear 31 is transmitted to the slide bearing 53. As the slide bearing 53, a slide bearing with a multi-layer flange having a back metal is adopted.
The moving body arranged inside the external electrode 24 moves inside the external electrode 24 in accordance with the drive of the rack gear 31. At this time, since two of the four guide wheels 74 are in contact with the inner walls of both side surfaces of the outer electrode 24 and the remaining two are in contact with the inner wall of the bottom surface of the outer electrode 24, the moving body is not shaken and the length of the outer electrode 24 is long. It can move almost parallel to the direction.

In the linear drive system having such a configuration, the electric power transmitted to the slide bearing 53 is transmitted to the external electrode 24 via the feather touch electrode 23. Specifically, a junction capacitance is formed between the slide bearing 53 as the power transmission electrode and the feather touch electrode 23 as the power reception electrode. Therefore, the electric power transmitted from the slide bearing 53 is transmitted to the feather touch electrode 23 via the junction capacitance. Then, the electric power transmitted to the feather touch electrode 23 is transmitted to the external electrode 24 in contact with the feather touch electrode 23. Thereby, a transfer line having a small cross section can be realized.

Further, by inserting the ANT portion 75 into the gap between the communication line L and the external electrode 24 and the shield metal foil 72 surrounding the communication line L, the moving body is maintained in a non-contact state between the communication line L and the ANT portion 75. Can be moved. In this way, the communication line L can be utilized on the moving body side.
An LCX (leakage coaxial cable) can be used for the communication line L. LCX has the advantage that it is inexpensive because it can use existing products as well as being able to maintain constant quality due to its mass productivity.

Further, in the linear drive system to which the power supply system of the present invention is applied, a worm rack type drive system (Patent No. 4531097) can be used instead of the pinion gear 41. In this case, since the motors can be arranged substantially in the line direction, it is possible to realize further miniaturization of the linear drive system to which the power supply system of the present invention is applied.

Next, a case where the power supply system of the present invention is applied to a linear drive system having a curved portion will be described.
FIG. 11 is a diagram showing a configuration when the power supply system of the present invention is applied to a linear drive system having a curved portion.

In FIG. 10, it is assumed that the external electrode 24 is a straight line, but the external electrode 24 may have a curved portion. In this case, the rack gear 31 has a problem that the pitch of the gear teeth differs between the inner circumference and the outer circumference when passing through the curved portion.
For this, as shown in FIG. 11, a method in which the curve pinion gear 44 and the curve rack gear 33 are used in combination is used. Here, the "curve pinion gear" refers to a pinion gear that allows a weak displacement of the gear teeth (gear plate 401). Further, the "curve rack gear" refers to a rack gear having a curved portion and having a predetermined bulge at the center of the teeth (convex portion).
In the case of the normal pinion gear 41, it is necessary to use the curve rack gear 33 at the curved portion regardless of the size of the radius of curvature. However, when the curve pinion gear 44 and the curve rack gear 33 are used in combination, it is sufficient to use the curve rack gear 33 only when the radius of curvature of the curved portion is large.

FIG. 11A is a cross-sectional view showing the configuration of the curve pinion gear 44.
As shown in FIG. 11A, the curve pinion gear 44 has a plurality of metal gear plates 401 extending radially from the central portion, and an elastic body 402 is filled in a gap between adjacent gear plates 401. There is. The material of the elastic body 402 is not particularly limited, but it is preferable to use a material that has elasticity and compression resistance and is in close contact with the metal. For example, silicon rubber can be adopted.

FIG. 11B is a diagram showing a state in which the two bobbins 403 are arranged so as to sandwich the curve pinion gear 44.
The bobbin 403 is fixed by a fixing screw 404 so as to sandwich the curve pinion gear 44. Further, although not shown, there is a gap between the gear plate 401 and the bobbin 403 that allows a minute displacement of the gear plate 401, and the gap is filled with an elastic body 402.
With this bobbin 403, the elastic body 402 can be prevented from coming out of the curve pinion gear 44.

11C to 11E are views showing how the curve rack gear 33 and the curve pinion gear 44 are meshed with each other. The radius of curvature of the curved portion decreases in the order of FIGS. 10E, D, and C.
FIG. 11F is a diagram showing how the rack gear 31 on a straight line and the pinion gear 44 for a curve are meshed with each other.
When a moving body including the curve pinion gear 44 is driven linearly, as shown in FIG. 11F, the contact point P (not shown) between the rack gear crown 310 and the gear plate 401 of the rack gear 31 on the straight line is the moving body. Is distributed as a contact line T substantially perpendicular to the direction of linear movement. The broken line rectangle indicates the valley portion 313 of the rack gear 31.

On the other hand, when the moving body provided with the curve pinion gear 44 drives on the curved portion, if the radius of curvature is reduced in the order of FIGS. 10E, D, and C, the position of the contact point P is gradually outside. A moment that displaces the gear plate 401 acts. However, since the curve rack gear 33 is used, the displacement angle of the curve pinion gear 44 can be Φ with respect to the displacement angle θ of the curve rack gear 33. As a result, the displacement of the gear plate 401 can be suppressed to a small value, so that the life of the curve pinion gear 44 can be extended. The polygonal shape of the broken line indicates the valley portion 312 of the rack gear 33 for the curve.
In this way, by using the curve rack gear 33 and the curve pinion gear 44, the moving body can be smoothly driven even in the curved portion. The curve pinion gear 44 can also be used as a pinion gear without backlash with respect to the curve rack gear 33 by manufacturing the gear plate 401 by slightly deforming (bending, bending, etc.) the gear plate 401. In this case, electric power can be transmitted even on a line having a curved portion.

Next, in order to apply the power supply system of the present invention to a linear drive system having a curved portion, a case where two rack gears 31 and a differential gear 81 are used will be described.
FIG. 12 is a diagram showing a configuration when two rack gears 31 and a differential gear 81 are used in order to apply the power supply system of the present invention to a linear drive system having a curved portion.

FIG. 12A is a cross-sectional view of a linear drive system to which the power supply system of the present invention is applied as viewed from the side.
FIG. 12B is a sectional view of a linear drive system to which the power supply system of the present invention is applied as viewed from the longitudinal direction.
As shown in FIG. 12B, the moving body arranged inside the external electrode 24 includes two pinion gears 41, a rotating shaft 52, a slide bearing 53, a differential gear 81, and a bevel gear 82. Further, although not shown, the body 73, the guide wheel 74, and the ANT 75 are provided in the same manner as the moving body shown in FIG.
Further, inside the external electrode 24, a metal fixing base 83, two rack gears 84a and 84b, an insulating layer I, and a communication line L are arranged. The rack gear 84a and the external electrode 24 are separated by sandwiching the insulating layer I. Further, the rack gear 84b and the external electrode 24 are connected by sandwiching a metal fixing base 83 as a conductive layer. The communication line L is surrounded by the external electrode 24 and the shield metal foil 72, similarly to the moving body shown in FIG.

In the moving body arranged inside the external electrode 24, the two pinion gears 41 and the rotating shaft 52 are held by the two slide bearings 53, respectively. As the slide bearing 53, a slide bearing with a multi-layer flange having a back metal is adopted.
Further, the two pinion gears 41 are coupled by a differential gear 81 in which both shafts are insulated. As a result, even in the curved portion, it is possible to absorb the difference in the peripheral length distance between the inside of the curved portion and the outside of the curved portion.

Further, by using the rack gears 84a and 84b of Article 2 as power transmission electrodes, electric power can be transmitted without using other electrodes such as feather touch electrodes. That is, a junction capacitance is formed between each of the two slide bearings 53 as the power receiving electrodes and the two rack gears 84a and 84b as the power transmission electrodes. As a result, the electric power extracted from each of the two rack gears 84a and 84b can be transmitted to each of the two slide bearings 53.

Further, by providing the bevel gear 82 and driving the differential gear 81, the shaft of the motor can be arranged at the inner center of the external electrode 24 and substantially parallel to the longitudinal direction of the line, so that further miniaturization can be achieved. Can be done. Instead of the bevel gear 82, a cap feather gear, a worm gear, a high void gear, or the like can also be used.
In FIG. 12, the potential of the rack gear 84b is set to the same potential as that of the external electrode 24, but both of the two rack gears 84a and 84b can be insulated from the external electrode 24 and operated as two parallel wires. That is, the metal fixing base 83, which is the conductive layer, can be replaced with the insulating layer I to operate.
Further, the pinion gear 41 can be replaced with the curve pinion gear 44 shown in FIG. In this case, the displacement amount of the gear plate 401 can be further reduced.

Next, a case where the power supply system of the present invention is applied to a conventional multi-directional drive device will be described.
FIG. 13 is a diagram showing an example when the power supply system of the present invention is applied to a multi-directional drive device according to a prior art.

As a conventional technique for driving gears in multiple directions, a multi-directional drive device as shown in FIG. 13 has already been disclosed (Japanese Patent Laid-Open No. 2011-196487). That is, even if only the prior art is used, it is possible to move the spur gear 45 in multiple directions on the plate-shaped driven body 34 having a plurality of convex portions on the surface.
However, in the prior art, there is a problem that in order to supply electric power to the drive body side via the spur gear 45, it is necessary to always route the power cable or drive it by a battery.
Therefore, by applying the power supply system of the present invention to the prior art, power is supplied from the plate-shaped rack gear 31 side having a plurality of convex portions (teeth) on the surface to the transport body (drive body) side via the pinion gear 41. It becomes possible to supply power. Thereby, the above problem can be solved.
In FIG. 13, the reference numerals without parentheses indicate the driven body 34 and the spur gear 45 of the prior art, and the reference numerals with parentheses indicate the rack gear 31 and the pinion gear 41 constituting the power supply system of the present invention. ..

Next, an example in which the power supply system of the present invention is applied to the multi-directional drive device of FIG. 13 will be described.
FIG. 14 is a cross-sectional view showing a configuration when the power supply system of the present invention is applied to the multi-directional drive device of FIG.

First, the power transmission electrode side will be described.
The plurality of gear blocks 311 are obtained by dividing the plate-shaped rack gear 31 shown in FIG. 13 so as to form a square having the same shape, and the pitch of the convex portions (teeth) is maintained constant. Further, each of the plurality of gear blocks 311 has conductivity, and the adjacent gear blocks 311 are insulated from each other.
Although not shown, each of the plurality of gear blocks 311 is arranged in a checkered pattern, and the polarity of the power supply power supply is set. At this time, since the adjacent gear blocks 311 are set so that the polarities of the power feeding power supplies are different, a parasitic capacitance Cp is generated, but an inductance is installed so as to resonate with the total capacitance between the gear blocks 311. Further, high frequency power is supplied from the transformer to this inductance.
Since the circuit configuration is as described above, it is necessary to prepare a circuit shown in FIG. 14 and a high-frequency power supply Vf for each unit of a predetermined number of gear blocks 311 as one unit.

Next, the power receiving electrode side will be described.
As shown in FIG. 14, a plurality of pinion gears 41 are arranged on the plurality of gear blocks 311, and the pinion gear 41 and the gear block 311 have a portion that meshes with each other. Although the pinion gear 41 has a rotating shaft 52, it is not necessary for all of the plurality of pinion gears 41 to have a driving force, and some pinion gears 41 may have a driving force.
A conductive cover 43 shown in FIG. 5 covers one pinion gear 41 and is arranged as a power receiving electrode insulated from the other conductive covers 43 in each of the plurality of pinion gears 41. For convenience of explanation, this is used. It is omitted and is shown as a bearing 51.
Further, although not shown, a pair of diodes having different directions are attached to each electrode, and each electrode is connected to different polarities of the load portion. As a result, electric power can be received at any place.
When the pinion gear 41 straddles a plurality of gear blocks 311, there arises a problem that a current flows to the larger joint capacitance Cc. To this end, the problem can be solved by providing an insulating layer (not shown) at intervals of the gear blocks 311 by one pitch of the teeth of the pinion gear 41. In this case, one gear made of an insulator may be provided as an insulating layer between the gear blocks 311.

Next, an example of a power supply system using a high-frequency detection switch will be described.
FIG. 15 is a cross-sectional configuration diagram showing an example of a power supply system using a high frequency detection switch.

In FIG. 15, when the power transmission frequency output from the high frequency power supply Vf1 is around 10 MHz and the high frequency signal source Vf2 installed on the power receiving electrode side is around 10 GHz, the pinion gear 41 of the carrier exists directly below. It is shown that power is transmitted from.
As shown in FIG. 15, the power transmission electrodes are separated and arranged in a plurality of gear blocks 311 smaller than the gear block 311 in FIG.
Each of the plurality of gear blocks 311 is provided with an element (hereinafter, referred to as "high frequency detection switch") SW capable of detecting a high frequency signal output from the high frequency signal source Vf2 and operating the switch. The gear block 311 is normally connected to the ground, but high-frequency power can be transmitted only when the high-frequency detection switch SW is turned on. The power source of the high frequency detection switch SW is not particularly limited, but for example, a method such as laying a DC power supply wiring, a built-in battery, or a stored high frequency signal can be adopted.
Further, although not shown, the high frequency detection switch control unit Sa is equipped with a filter so that only high frequency signals flow.
Further, the voltage of the high frequency power supply Vf1 is boosted n times via a transformer and then distributed, then stepped down 1 / n times in front of the load R and applied to the load R. The electric field coupling is boosted because the higher the voltage, the more advantageous it is.

The transport body side is composed of a pinion gear 41 having a driving function and a power receiving function, a sensing electrode 13 arranged around the pinion gear 41, and a moving electrode 14.
Both the sensing electrode 13 and the moving electrode 14 are arranged close to the gear block 311 so that the bonding capacitance with the gear block 311 is large.
Further, as shown in FIG. 15, in the power receiving circuit, a choke coil LPI is provided so that a high frequency signal flows only to the pinion gear 41, the sensing electrode 13, and the moving electrode 14. As a result, when a high-frequency current flows, the switch is turned on to form a power transmission circuit.

Next, as an example of the power supply system using the high frequency detection switch, an example different from FIG. 15 will be described.
FIG. 16 is a cross-sectional configuration diagram showing an example different from that of FIG. 15 as an example of a power supply system using a high frequency detection switch.

The example shown in FIG. 16 uses a high frequency detection switch as in the example shown in FIG. However, the number of power receiving electrodes arranged around the pinion gear 41 is two, that is, the sensing electrode 13 and the moving electrode 14 in the example shown in FIG. 15, whereas in the example shown in FIG. 16, the moving electrode 14 is arranged. Only. However, in the example shown in FIG. 16, the high-frequency detection switch has a thread hold function utilizing the fact that the current density of the bearing 51 is higher than the current density of the moving electrode 14. Therefore, when the current density of the high-frequency current is high, the switch is turned on to form a power transmission circuit. In the example shown in FIG. 16, the circuit is simplified by the above configuration.

Next, an example of a power supply system using an optical detection switch will be described.
FIG. 17 is a cross-sectional configuration diagram showing an example of a power supply system using an optical detection switch.

In the example shown in FIG. 17, instead of the high frequency detection switch used in the examples shown in FIGS. 15 and 16, the switch is turned on by using the light output from the light source 91.
As shown in FIG. 17, an opening 92 for transmitting light is provided in the central portion of the gear block 311, and a light detection switch control unit Sb is arranged below the opening 92. With such a configuration, the high frequency current is switched only in the gear block 311 that receives the light output from the light source 91. The operating power supply of the photodetector switch control unit Sb is not particularly limited, but for example, a method such as laying DC power supply wiring, a built-in battery, or a stored photovoltaic voltage can be adopted.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the range in which the object of the present invention can be achieved are included in the present invention. Is.

For example, in the above-described embodiment, non-contact of the electrode pair is premised, but it is sufficient when the electrode pair is not completely non-contact but is contacted through an insulator and electrically maintained in close proximity. It is possible to secure the bonding capacity. That is, even if some of the electrode pairs are physically in contact with each other, sufficient power can be supplied as long as they are electrically insulated.

Further, the switches that can be adopted in the power supply system of the present invention are not limited to the switches illustrated in FIGS. 15 to 17. For example, any switch capable of detecting mechanical vibration, mechanical load, magnetic field, etc. can be adopted.

Further, the gear member of the power supply system of the present invention is naturally connected to a prime mover such as a predetermined motor, and can be applied to any mechanical element using the gear.

Summarizing the above, the power supply system to which the present invention is applied suffices to have the following configuration, and various various embodiments can be taken.
That is, the power supply system to which the present invention is applied is
A power supply system that applies electric field-coupled power transmission technology.
A power transmission unit (for example, rack gear 31 in FIG. 4) that transmits power from an AC power source having a predetermined wavelength, and
It has a power receiving electrode (power receiving electrode 22 in FIG. 1), and a portion of the power transmitting portion facing the power receiving electrode is used as a power transmitting electrode (transmission electrode 12 in FIG. 1), and is formed by the power transmitting electrode and the power receiving electrode. A power receiving unit (power receiving unit 2 in FIG. 1) that receives power from the power transmitting unit and supplies the load through the plurality of junction capacities.
With
The power receiving electrode is formed of a conductor gear member (for example, the pinion gear 41 in FIG. 4).
The power transmission unit has irregularities corresponding to the teeth of the gear member, and is arranged so as to mesh with the teeth.
As a result, electric power can be supplied to the mechanical element using the gear through the gear.

Further, the teeth of the gear member can be composed of a plurality of plate-shaped members (for example, the gear plate 401 of FIG. 11) radially extending from the vicinity of the central portion of the gear member, and the adjacent plate-shaped members can be formed. An elastic body (for example, the elastic body 402 in FIG. 11) can be filled between the members.
As a result, the power receiving unit can smoothly pass through the power transmission line having the curved portion while transmitting power to the load.

Further, a conductor (for example, the conductive cover 43 in FIG. 5) arranged so as to cover the gear member and the power transmission unit can be further provided.
Electric power can be transmitted from the power transmission unit to the power reception unit via a plurality of junction capacitances formed by at least one of the power transmission electrode and the power reception electrode and the conductor.
Thereby, the bonding capacity can be further increased. In addition, the amount of electromagnetic energy generated to the outside can be reduced.

Further, the power transmission electrode can be formed of a gear member of a conductor.
The power receiving portion has irregularities corresponding to the teeth of the gear member, and can be arranged so as to mesh with the teeth.
As a result, the polarities of the electrodes are reversed, and electric power can be transmitted without any problem.

Further, the power supply system to which the present invention is applied is
A power supply system that applies electric field-coupled power transmission technology.
A power transmission unit that transmits power from an AC power source of a predetermined wavelength,
It has a power receiving electrode, and a portion of the power transmission unit facing the power receiving electrode is used as a power transmission electrode, and power is received from the power transmission unit via a plurality of junction capacities formed by the power transmission electrode and the power receiving electrode. And the power receiving part that supplies the load
Can be equipped with
The power receiving electrode can be formed by a conductor pulley (for example, the pulley 42 in FIG. 7).
The power transmission unit may be a timing belt (for example, the timing belt 32 in FIG. 7) having irregularities corresponding to the teeth of the pulley and arranged so as to mesh with the teeth.
As a result, the junction capacity formed between the power transmission unit and the power reception unit can be further increased.

1: Transmission unit 2: Power receiving unit 3: Gear unit 4: Bearing unit 11,21: Parallel resonance circuit, 12: Transmission electrode, 13: Sensing electrode, 14: Mobile electrode, 22: Power receiving electrode, 23: Feather touch electrode, 24: external electrode, 31,84a, 84b: rack gear, 32, 32a, 32b: timing belt, 34: driven body, 41: pinion gear, 42, 42a, 42b: pulley, 43: conductive cover, 45: Drive body, 50: Flange, 51: Bearing, 52: Rotating shaft, 53: Sliding bearing, 61: Profile, 71: Connector, 72: Shield metal foil, 73: Body, 74: Guide wheel, 75: ANT, 76: Transmission line, 81: Differential gear, 82: Bevel gear, 83: Metal fixing base, 91: Light source, 92: Light transmission port, 301, 402: Elastic body, 302: Toothcloth, 303: Mesh electrode, 304: Conductive Wire, 305: Tension body, 306: Contact part, 310,314: Rack gear crown, 311: Gear block, 312, 313: Rack gear valley, 401: Gear plate, 403: Bobbin, 404: Fixing screw, 501: Outer conductor, 502: Inner conductor

Claims (6)

A power supply system that applies electric field-coupled power transmission technology.
A power transmission unit that transmits power from an AC power source of a predetermined wavelength,
It has a power receiving electrode, and a portion of the power transmission unit facing the power receiving electrode is used as a power transmission electrode, and power is received from the power transmission unit via a plurality of junction capacities formed by the power transmission electrode and the power receiving electrode. And the power receiving part that supplies the load
With
The power receiving electrode is formed of a gear member of a conductor.
The power transmission unit has irregularities corresponding to the teeth of the gear member, and is arranged so as to mesh with the teeth.
Power supply system. The teeth of the gear member are composed of a plurality of plate-shaped members extending radially from the vicinity of the central portion of the gear member, and an elastic body is filled between the adjacent plate-shaped members.
The power supply system according to claim 1. Further provided with a conductor arranged so as to cover the gear member and the power transmission unit.
Power is transmitted from the power transmission unit to the power reception unit via a plurality of junction capacitances formed by the power transmission electrode, at least one of the power reception electrodes, and the conductor.
The power supply system according to claim 1 or 2. The power transmission electrode is formed of a gear member of a conductor.
The power receiving portion has irregularities corresponding to the teeth of the gear member, and is arranged so as to mesh with the teeth.
The power supply system according to any one of claims 1 to 3. A power supply system that applies electric field-coupled power transmission technology.
A power transmission unit that transmits power from an AC power source of a predetermined wavelength,
It has a power receiving electrode, and a portion of the power transmission unit facing the power receiving electrode is used as a power transmission electrode, and power is received from the power transmission unit via a plurality of junction capacities formed by the power transmission electrode and the power receiving electrode. And the power receiving part that supplies the load
With
The power receiving electrode is formed of a pulley of a conductor.
The power transmission unit is a timing belt having irregularities corresponding to the teeth of the pulley and arranged so as to mesh with the teeth.
Power supply system. The power transmission electrode is formed of a pulley of a conductor.
The power receiving portion is a timing belt having irregularities corresponding to the teeth of the pulley and arranged so as to mesh with the teeth.
The power supply system according to claim 5.

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