JP2018170841A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply power, via a gear, to a machine element using the gear.SOLUTION: In the power supply system to which a technology for transmitting electric field coupling power is applied, a rack gear 31 has a power receiving electrode 22 that transmits power of a predetermined wavelength from an AC power source Vf. While a portion, of the rack gear 31, facing the power receiving electrode 22 serves as a power transmitting electrode 12, a power receiving unit 2 receives power from the rack gear 31 via a plurality of junction capacitors Cc formed by the power transmitting electrode 12 and the power receiving electrode 22, and supplies the power to a load R. The power receiving electrode 22 is formed of a conductive pinion gear 41, and the rack gear 31 has recesses and projections corresponding to teeth on the pinion gear 41, and is disposed so as to mesh with the teeth.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a power supply system.

  Conventionally, a technique for supplying electric power by electric field coupling has been disclosed (see, for example, Patent Document 1), and the present applicant has also used electric power coupling means between bearings, transmission rails and movement as electric field coupling electric power transmission means in machine elements. The power transmission means between the body and the body has already been proposed (for example, see Patent Documents 2 to 5 for the power transmission means between the bearings).

Japanese Patent Laid-Open No. 2015-099880 Japanese Patent Laying-Open No. 2015-154577 Japanese Patent Application Laid-Open No. 2014-147203 and Drawing Japanese Patent Application Laid-Open No. 2015-094901 and drawings JP-A-2006-031312 specification and drawings

  However, conventionally, including Patent Documents 1 to 5, no method has been proposed for supplying electric power to a mechanical element using a gear via the gear.

  This invention is made | formed in view of such a condition, and it aims at supplying electric power via a gearwheel with respect to the machine element using a gearwheel.

In order to achieve the above object, a power supply system according to an aspect of the present invention includes:
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power receiving electrode is formed of a conductive gear member,
The power transmission unit has irregularities corresponding to the teeth of the gear member, and is arranged to mesh with the teeth.

  Further, the teeth of the gear member are constituted by a plurality of plate-like members extending radially from the vicinity of the center of the gear member, and an elastic body is filled between the adjacent plate-like members. it can.

In addition, further comprising a conductor arranged to cover the gear member and the power transmission unit,
Electric power can be transmitted from the power transmission unit to the power reception unit through a plurality of junction capacitors formed by at least one of the power transmission electrode and the power reception electrode and the conductor.

The power transmission electrode is formed of a conductive gear member,
The power receiving unit has irregularities corresponding to the teeth of the gear member, and can be arranged to mesh with the teeth.

In order to achieve the above object, a power supply system according to one embodiment of the present invention includes:
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power receiving electrode is formed of a conductive pulley,
The power transmission unit may be a timing belt that has irregularities corresponding to the teeth of the pulley and is arranged to mesh with the teeth.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to supply electric power to a mechanical element using a gear via a gear.

It is a circuit diagram which shows that the junction capacity | capacitance is formed with the electrode pair which opposes in the power transmission circuit to which an electric field coupling power transmission technique is applied. It is an image figure which shows the mode of the power transmission for every situation between the metals used as an electrode, and an equivalent circuit diagram for every situation. It is a figure which shows the mode of the electric field energy stored between the meshing gears. It is a figure which shows the example in the case of transmitting electric power via 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 joining capacity | capacitance formed when a conductive cover is covered with respect to the rack gear and the pinion gear. It is a figure which shows the example at the time of implement | achieving electric power transmission and communication by an electric field coupling technique by incorporating the mesh electrode comprised with metal meshes, and a conductive wire in the inside of a timing belt. It is a figure which shows the positional relationship of a timing belt and a pulley. It is a figure which shows the example at the time of making a timing belt mesh with the pulley provided with a flange. It is an image figure which shows a structure at the time of performing power transmission or communication using two sets of timing belts and pulleys. It is a figure which shows the structure at the time of applying the electric power supply system of this invention to a linear drive system. It is a figure which shows the structure at the time of making the electric power supply system of this invention applied to the linear drive system which has a curve part. It is a figure which shows the structure at the time of using two rack gears and a differential gear, in order to apply the electric power supply system of this invention to the linear drive system which has a curve part. It is a figure which shows the example at the time of applying the electric power supply system of this invention to the multidirectional drive device which is a prior art. It is sectional drawing which shows a structure at the time of making the electric power supply system of this invention applied with respect to the multidirectional drive device of FIG. It is a figure which shows an example using a high frequency detection switch. FIG. 16 is a cross-sectional configuration diagram illustrating an example different from FIG. 15 as an example of a power supply system using a high-frequency detection switch. It is a section lineblock diagram showing an example of a power supply system using a photodetection 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, the power transmission circuit to which the electric field coupling power transmission technology is applied includes a power transmission unit 1 and a power reception unit 2.
Here, the electric field coupled power transmission technology is a technology that realizes non-contact power transmission by flowing a high-frequency current in a state in which a junction capacitance Cc is formed by an electrode pair made of opposing metal plates.
That is, a power transmission electrode 12 made of a metal plate is provided at the end of the power transmission unit 1 that transmits power from the AC power supply Vf, and a power reception electrode 22 made of a metal plate is received at the tip of the power reception unit 2 that receives the power and supplies it to the load R. By arranging them to face each other, a junction capacitor Cc is formed, and an electric field coupling power transmission technique is realized.

The power transmission unit 1 includes a parallel resonant circuit 11, a power transmission electrode 12, and a transformer T1. Since the AC power source 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 resonance circuit 11 via a transformer T1. That is, the parallel resonant circuit 11 is configured by connecting the capacitor C1 and the coil L2 in parallel with each other.
Further, the coil L1 is adopted as the primary winding and the coil L2 is adopted as the secondary winding, thereby forming the transformer T1.
Here, the ratio of the number of windings of the coil L1 and the number of windings of the coil L2 is 1: n. For this reason, 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.
In addition, 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 parallel resonance circuit 21 is connected to the power reception electrode 22 of the power reception unit 2. That is, the parallel resonant circuit 21 is configured by connecting the capacitor C2 and the coil L3 in parallel with each other.
Further, the coil L3 is employed as the primary winding, and the coil L4 is employed as the secondary winding, whereby the transformer T2 is configured.
Here, the ratio of the number of turns of the coil L3 and the number of turns of the coil L4 is n: 1. For this reason, the voltage on the primary side, that is, the voltage received by the power receiving unit 2 and applied to the parallel resonance circuit 21 is stepped down 1 / n times by the transformer T2 and applied to the load R.
The electric field coupling power transmission technique is realized by the configuration as described above.

Next, the power transmission at the metal bonding interface serving as an electrode will be described.
FIG. 2 is an image diagram showing a state of power transmission in various situations between metals serving as electrodes, and an equivalent circuit diagram in each situation.
FIG. 2A is an image diagram and an equivalent circuit diagram showing a state in which a direct current is passed by making a rigid metal face each other as an electrode.
The gear used for the machine element is generally a rigid metal. In this way, when the gear is made of a rigid metal, as shown in FIG. 2A, even if the gear is precisely polished, the portions where the gears mesh with each other are in point contact. For this reason, when a direct current is passed through the circuit, the conductive current indicated by the broken-line arrow is concentrated at the point-contact portion. For this reason, the point contact portion is heated, and the metal atoms migrate or are oxidized. Furthermore, the point contact part is welded by heating, and the surface may be damaged by the movement.

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 increases. In particular, in the vicinity of the point contact portion, the distance between the metals becomes extremely short, so that the junction capacity increases and the mutation current increases. For this reason, the current does not concentrate on the point contact portion.
Also, as shown in FIG. 2C, by coating DLC (Diamond Like Carbon) or hard alumite layer as the insulating layer I on the metal interface, the conduction current is cut off and only the displacement current indicated by the solid line arrow is made. Can do. In this state, the equivalent circuit is only the capacitance. Even if DLC is used for coating cylinders and pistons of an engine, it has an effect of improving slipperiness and the like, so it has resistance to use under harsh environments. Further, even if the DLC is used for a gear system such as a rack gear and a pinion gear, the DLC has a certain degree of resistance unless it is used under extremely severe conditions.

  Further, as shown in FIG. 2D, in the worst case, the insulating layer of the convex portion may be shaved and the metal may appear. Even in this case, the insulating layer I remains around the metal contact. At this time, even if the material adopted as the insulating layer is DLC or hard anodized, the dielectric constant is higher than that of air, so that the junction capacity is increased and the conductive current indicated by the broken-line arrow is larger than the conductive current. 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 other layer is also coated with the insulating layer I, when the electrodes are moving, the ratio of the metal contacts facing each other is Extremely low. In this regard, since DLC has high slidability between DLCs, the insulating layer I can be coated on both opposing metals.

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

  When gears mesh, forces are always transmitted at the contacts. Therefore, as shown in FIG. 3A, when the insulating layer I is coated on any surface of the rack gear 31 and the pinion gear 41 that meshes with the rack gear 31, a portion in the vicinity of the rack gear 31 and the pinion gear 41 meshing with each other. Then, the weak electric field area E1 occurs. Further, as shown in FIG. 3B, at the portion where the rack gear 31 and the pinion gear 41 are engaged with each other, the two are very close to each other, so that a strong electric field area E2 is generated. Furthermore, since both the rack gear 31 and the pinion gear 41 are gears, their respective end portions are in mesh with each other as gear teeth. For this reason, the area of the part where the rack gear 31 and the pinion gear 41 are in contact with each other is wide, and the junction capacity can be widely formed in this part.

Next, how power is transmitted through a gear will be described.
FIG. 4 is a diagram illustrating an example of a case where power is transmitted via a gear in a power transmission circuit to which the electric field coupled power transmission technology is applied.

  As shown in FIG. 4A, the 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 a load is arranged on the conveyance body conveyed by driving the pinion gear 41, as shown in FIG. 4 and 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, a problem such as power wear occurs at the contact portion between the rotation-side slip ring and the stationary-side brush, so that the junction capacity is reduced.

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

  As shown in FIG. 5A, by covering the rack gear 31 and the pinion gear 41 with the conductive cover 43, the conductive cover 43 has a junction capacitance Cc 1 formed between the rack gear 31 and the pinion gear 41 and the rack gear 31. And the junction capacitance Cc2 formed between itself and the junction capacitance Cc3 formed between the pinion gear 41 and itself. As shown in FIG. 5B, the conductive cover 43 also integrates a junction capacitance Cc4 formed between the rotary shaft 52 and the junction capacitance Cc4 formed between itself. Thus, the conductive cover 43 can increase the junction capacity.

Further, since the conductive cover 43 is disposed so as to physically surround the rack gear 31 and the pinion gear 41, the amount of electromagnetic energy (not shown) generated in the junction capacitors Cc1 to Cc3 is reduced to the outside. 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, by arranging a plurality of pinion gears 41 and covering the rack gear 31 and the plurality of pinion gears 41 with the conductive cover 43, the junction capacity can be further increased. In this case, the plurality of pinion gears 41 are not necessarily connected to the drive system.

  4 and 5, the high-frequency power source Vf is connected to the rack gear 31, and the load R is connected to the pinion gear 41 via the bearing 51. However, the present invention is not limited to this configuration. 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, power may be transmitted from the rack gear 31 side to the pinion gear 41 side, or power may be transmitted from the pinion gear 41 side to the rack gear 31 side.

In FIGS. 4 and 5, power transmission between the rack gear 31 and the pinion gear 41 has been described as an example of power transmission between the gears, but the present invention is not limited to this example. For example, a combination of a plurality of spur gears (spur gears) may be used. In this case, the joint capacity formed by the surfaces of the spur gear teeth facing each other and the joint capacity formed between the conductive cover and the spur gear covering the entire plurality of spur gears are used for power transmission. Can do. In addition, 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 caps gears.
Furthermore, the power supply system of the present invention can also be applied to a gear using a chain and a belt incorporating a conductive mesh. Further, the joining capacity can be increased by using a belt crawler (manufactured by Kamo Seiko Co., Ltd.) in which conductive fibers are woven.

  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 into the timing belt 32. It is.

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

  In addition, a conductive wire 304 and a tensile body 305 are also incorporated in the elastic body 301. The conductive wire 304 is made of a material that is highly bendable. The conductive wire 304 may be a stranded wire obtained by combining a plurality of conductors. The tensile body 305 is formed of a member that can give sufficient resistance to the elongation of the timing belt 32 in the longitudinal direction. As the tensile body 305, a member made of a material having relatively small elongation, such as a steel cable, can be employed. Note that the conductive wire 304 can function as the tensile body 305.

The mesh electrode 303 and the conductive wire 304 are electrically connected at the contact portion 306 by contact or capacitive coupling. Here, an important role of the mesh electrode 303 is to establish electrical continuity with the conductive wire 304 and to form a junction capacitance with a pulley 42 shown in FIG. 7 described later. For this reason, the mesh electrode 303 is not necessarily a continuous body, but has the effect of reinforcing the elastic body 301 by being entangled with the elastic body 301. Therefore, the mesh body 303 has the effect of reinforcing the elastic body 301. Get higher.
In FIG. 6, one mesh electrode 303 is arranged on one timing belt 32. However, the mesh electrode 303 arranged on the timing belt 32 is not limited to one, and a plurality of mesh electrodes 303 may be arranged. Also good. When a plurality of mesh electrodes 303 are arranged, it is necessary to prepare an independent conductive wire 304 for each mesh electrode 303. In particular, when communication is realized by the electric field coupling technique, it may be configured by two parallel mesh electrodes 303 in which characteristic impedance is considered.

  FIG. 7 is a diagram showing a 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 engaged with each other, the area of the contact portion is larger than the area of the contact portion between the gears shown in FIGS. That is, when the timing belt 32 and the pulley 42 are brought into contact with each other, as in the case where the chain and the gear are brought into contact with each other, the contact is made at a site that is about half or more of the outer circumference of the pulley 42, so that the joining capacity is increased. Is suitable. 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 junction capacity.
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. For this reason, the junction capacitance can be further increased.

Further, when the timing belt 32 and the pulley 42 are brought into contact with each other, a flange 43 can be attached to the pulley 42.
FIG. 8 is a diagram illustrating an example in which the timing belt 32 is engaged with a pulley 42 having a flange.

  As shown in FIG. 8, when the timing belt 32 is engaged with a pulley having the flange 50, the side surface of the timing belt 32 and the flange 50 come into contact with each other, so that the joint capacity can be further increased. In this case, the mesh electrode 303 (not shown) that is incorporated in the timing belt 32 is configured to extend to the side surface of the timing belt so that it can contact 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 engaged with the pulley 42a fixed to the rotating shaft 52, and the pulley 42b and the timing belt 32b are attached to the tip via the insulating layer I.
As shown to FIG. 9A, the power transmission electrode 12 is attached to the both sides | surfaces of each of the pulley 42a and the pulley 42b by contact or capacitive coupling. A high frequency power source 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.
As described above, power and communication signals can be supplied to the timing belts 32a and 32b using the two sets of timing belts 32 (timing belts 32a and 32b) and the pulleys 42 (pulleys 42a and 42b). .

FIG. 9A shows a configuration in which the power transmission electrode 12 is attached to both sides of the pulley 42a and the pulley 42b, but the power receiving electrode 22 is not the power transmission electrode 12 on both sides of the pulley 42a and the pulley 42b. Can also be attached.
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 supplied to the load R on the power receiving side.

FIG. 9C shows a configuration when the load R exists 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 42 a is fixed to the outer conductor 501, and the pulley 42 b is fixed to the inner conductor 502. Thereby, electric power and a communication signal can be sent with respect to the rotating shaft 52. Note that the power and communication signals can be taken out as a voltage between the outer conductor 501 and the inner conductor 502 by opening a 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 a plurality of timing belts 32. In this case, by providing the power receiving electrode 22 in the profile 61, a power receiving function and a communication function by electric field coupling can be provided. For example, a sensor may be provided as the load R in the profile 61 so that the conveyance body on the timing belt 32 can be detected. The profile 61 may employ “Hame Pachin” (registered trademark) or the like.

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, one of the two lines of power transmission circuit is the rack gear 31 and the other is the feather touch electrode 23, so that power is supplied to the external electrode 24. Power is transmitted.
FIG. 10A is a sectional view of a linear drive system to which the power supply system of the present invention is applied as seen 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 therebetween. A connector 71 for inputting power output from the high-frequency power source is disposed at a predetermined portion of the external electrode 24. A power transmission line 76 extending from the bottom of the connector 71 is provided on the external electrode 24. The through hole and the insulating layer I are connected to the rack gear 31. For this reason, the electric power output from the high frequency power source is input to the rack gear 31 via the connector 71 and the power transmission line 76.

10B and 10C are cross-sectional views of the linear drive system to which the power supply system of the present invention is applied as seen from the longitudinal direction.
As shown in FIGS. 10B and 10C, the external electrode 24 is formed 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 movable body that can be arbitrarily moved in the longitudinal direction of the external electrode 24 can be disposed inside the external electrode 24. The moving body includes a pinion gear 41, a rotating shaft 52, a sliding bearing 53, a feather touch electrode 23, a body 73, a guide wheel 74, and an ANT (ultra-low power consumption radio) unit 75.
A rack gear 31, an insulating layer I, and a communication line L are disposed on the inner side of the outer electrode 24. The rack gear 31 and the external electrode 24 are separated by sandwiching the insulating layer I therebetween. The communication line L is surrounded by the external electrode 24 and the shield metal foil 72. Thereby, since electromagnetic radiation is reduced, 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 sliding bearings 53. As a result, a junction capacitance is formed between the sliding bearing 53 as the power receiving electrode and the rack gear 31 as the power transmission electrode, so that the electric power extracted from the rack gear 31 is transmitted to the sliding bearing 53. The sliding bearing 53 is a sliding bearing with a multi-layer flange to which a back metal is attached.
The moving body arranged inside the external electrode 24 moves inside the external electrode 24 in accordance with the driving of the rack gear 31. At this time, two of the four guide wheels 74 are in contact with the inner walls on both sides of the external electrode 24, and the remaining two are in contact with the inner wall of the bottom surface of the external electrode 24. It can move substantially parallel to the direction.

  In the linear drive system having such a configuration, the 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 sliding bearing 53 as a power transmission electrode and the feather touch electrode 23 as a power reception electrode. For this reason, the electric power transmitted from the sliding bearing 53 is transmitted to the feather touch electrode 23 through the junction capacitance. The power transmitted to the feather touch electrode 23 is transmitted to the external electrode 24 that contacts the feather touch electrode 23. Thereby, the conveyance line of a small cross section is realizable.

Further, by inserting the ANT part 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 communication line L and the ANT part 75 are maintained in a non-contact state while moving. Can be moved. In this way, the communication line L can also be utilized on the mobile body side.
Note that an LCX (leakage coaxial cable) can be employed for the communication line L. LCX has the advantage of not only being able to maintain a constant quality because of its mass productivity, but also being inexpensive because it can use existing products.

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

Next, the case where the electric power supply system of this invention is applied to the linear drive system which has a curve part is demonstrated.
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 is different between the inner periphery and the outer periphery when passing through the curved portion.
For this, as shown in FIG. 11, a method in which a curve pinion gear 44 and a curve rack gear 33 are used together is used. Here, the “curve pinion gear” refers to a pinion gear that allows a slight 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 in the central portion of the tooth (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 radius of curvature. However, when the curve pinion gear 44 and the curve rack gear 33 are used in combination, the curve rack gear 33 only needs to be used when the curvature radius of the curve 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 center, and the gap between adjacent gear plates 401 is filled with an elastic body 402. Yes. The material of the elastic body 402 is not particularly limited, but it is preferable that the elastic body 402 is made of a material that has elasticity and compression resistance and is in close contact with a metal. For example, silicon rubber can be employed.

FIG. 11B is a view showing a state where two bobbins 403 are arranged so as to sandwich the pinion gear 44 for curve.
The bobbin 403 is fixed by a fixing screw 404 so as to sandwich the curve pinion gear 44. Although not shown, there is a gap that allows a slight displacement of the gear plate 401 between the gear plate 401 and the bobbin 403, 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 a state in which the curve rack gear 33 and the curve pinion gear 44 are engaged with each other. In addition, the curvature radius of a curve part becomes small in order of FIG. 10E, D, and C. FIG.
FIG. 11F is a diagram illustrating a state in which the linear rack gear 31 and the curve pinion gear 44 are engaged with each other.
When the movable body including the curve pinion gear 44 is linearly driven, as shown in FIG. 11F, a contact point P (not shown) between the rack gear top 310 of the rack gear 31 and the gear plate 401 on the straight line is a movable body. Are distributed as contact lines T substantially perpendicular to the direction of linear movement. Note that a broken-line rectangle indicates the valley 313 of the rack gear 31.

On the other hand, when the moving body including the curve pinion gear 44 drives on the curved portion, the position of the contact point P gradually increases as the radius of curvature decreases in the order of FIGS. 10E, 10D, 10C. And a moment for displacing the gear plate 401 is applied. However, since the curve rack gear 33 is used, the displacement angle of the curve pinion gear 44 may be Φ with respect to the displacement angle θ of the curve rack gear 33. Thereby, since the displacement of the gear plate 401 can be kept small, the life of the curve pinion gear 44 can be extended. The broken polygon indicates the valley 312 of the curve rack gear 33.
As described above, 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 making the gear plate 401 slightly deformed (bent, curved, etc.). In this case, electric power can be transmitted even on a line having a curved portion.

Next, a case where 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 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 sectional view of a linear drive system to which the power supply system of the present invention is applied as seen from the side.
FIG. 12B is a cross-sectional view of the linear drive system to which the power supply system of the present invention is applied as seen 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 sliding bearing 53, a differential gear 81, and a bevel gear 82. Moreover, although not shown in figure, it has the body 73, the guide wheel 74, and the ANT75 similarly to the mobile 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 therebetween. 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 as in 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 two sliding bearings 53, respectively. The sliding bearing 53 is a sliding bearing with a multi-layer flange to which a back metal is attached.
The two pinion gears 41 are connected by a differential gear 81 in which both shafts are insulated. Thereby, also in a curved part, the circumference distance difference between the inner side of a curved part and the outer side of a curved part can be absorbed.

  Furthermore, by using the two rack gears 84a and 84b as power transmission electrodes, it is possible to transmit power without using other electrodes such as feather touch electrodes. That is, a junction capacitance is formed between each of the two sliding bearings 53 as the power receiving electrode and each of the two rack gears 84a and 84b as the power transmitting electrode. Thereby, the electric power extracted from each of the two rack gears 84 a and 84 b can be transmitted to each of the two sliding bearings 53.

Furthermore, by providing the bevel gear 82 and driving the differential gear 81, the motor shaft can be arranged substantially parallel to the inner central portion of the external electrode 24 and the longitudinal direction of the line, thereby further reducing the size. Can do. Note that a bevel gear, a worm gear, a high void gear, or the like can be used instead of the bevel gear 82.
In FIG. 12, the potential of the rack gear 84b is the same as that of the external electrode 24. However, the two rack gears 84a and 84b can be insulated from the external electrode 24 and operated as two parallel wires. That is, it is possible to operate by replacing the metal fixing base 83 which is a conductive layer with the insulating layer I.
Furthermore, the pinion gear 41 can be replaced with a 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 multidirectional drive device will be described.
FIG. 13 is a diagram showing an example in which the power supply system of the present invention is applied to a multi-directional drive device that is a conventional technique.

As a conventional technique for driving gears in multiple directions, a multidirectional drive device as shown in FIG. 13 has already been disclosed (Japanese Patent Laid-Open No. 2011-196487). That is, even if only the conventional technique is used, it is possible to move the spur gear 45 in multiple directions on the plate-like driven body 34 having a plurality of convex portions on the surface.
However, in the prior art, in order to supply electric power to the driving body via the spur gear 45, there is a problem that the power cable must always be routed or driven 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 conveying body (driving body) side via the pinion gear 41. Power can be supplied. Thereby, said problem can be solved.
In FIG. 13, reference numerals without parentheses indicate the prior art driven body 34 and spur gear 45, and 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 when the power supply system of the present invention is applied to the multidirectional 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 multidirectional 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 be all squares having the same shape, and the pitch of the convex portions (teeth) is maintained constant. The plurality of gear blocks 311 are all conductive, 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 is set. At this time, since the adjacent gear blocks 311 are set so that the polarity of the power supply is 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 fed from the transformer to this inductance.
Since the circuit configuration is as described above, a group of a predetermined number of gear blocks 311 is taken as one unit, and the circuit shown in FIG. 14 and the high-frequency power source Vf must be prepared for each unit.

Next, the power receiving electrode side will be described.
As shown in FIG. 14, a plurality of pinion gears 41 are disposed on a plurality of gear blocks 311, and the pinion gear 41 and the gear block 311 have portions that mesh with each other. Although the pinion gear 41 has the rotating shaft 52, it is not necessary to provide a driving force in all of the plurality of pinion gears 41, and a part of the pinion gears 41 only needs to have a driving force.
In each of the plurality of pinion gears 41, 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 cover 43. Omitted and shown as a bearing 51.
Although not shown, a pair of diodes with different directions is attached to each electrode, and each is connected to a different polarity of the load portion. Thereby, electric power can be received at an arbitrary place.
In addition, when the pinion gear 41 straddles a plurality of gear blocks 311, there arises a problem that a current flows in the larger junction capacitance Cc. To solve this problem, the gear block 311 can be separated by an interval corresponding to one pitch of the pinion gear 41, and an insulating layer (not shown) can be provided here. 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 illustrating an example of a power supply system using a high-frequency detection switch.

In FIG. 15, the power transmission frequency output from the high frequency power supply Vf1 is about 10 MHz, and the high frequency signal source Vf2 installed on the power receiving electrode side is about 10 GHz. It shows how power is transmitted from
As shown in FIG. 15, the power transmission electrode is 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 performing a switch operation. The gear block 311 is normally connected to the ground, but can transmit high-frequency power 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. For example, a technique such as laying a DC power supply wiring, a built-in battery, or a stored high-frequency signal can be employed.
Furthermore, although not shown, the high frequency detection switch controller Sa is equipped with a filter so that only a high frequency signal flows.
Further, the voltage of the high-frequency power supply Vf1 is boosted n times through a transformer and then distributed. The voltage is lowered 1 / n times before the load R and applied to the load R. The electric field coupling is boosted because a higher voltage is advantageous.

The carrier side includes a pinion gear 41 having a driving function and a power receiving function, a sensing electrode 13 and a moving electrode 14 arranged around the pinion gear 41.
The sensing electrode 13 and the moving electrode 14 are both disposed close to the gear block 311 so that the junction capacity with the gear block 311 is increased.
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. Thereby, when a high frequency current flows, a switch is turned on to form a power transmission circuit.

Next, an example different from FIG. 15 will be described as an example of a power supply system using a high-frequency detection switch.
FIG. 16 is a cross-sectional configuration diagram showing an example different from 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, in the example shown in FIG. 15, 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, whereas in the example shown in FIG. Only. However, in the example shown in FIG. 16, the high-frequency detection switch has a threshold function that utilizes the fact that the current density of the bearing 51 is higher than the current density of the moving electrode 14. For this reason, when the current density of the high frequency current is large, the switch is turned on to form a power transmission circuit. In the example shown in FIG. 16, the circuit is simplified by adopting the above configuration.

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

In the example shown in FIG. 17, the light output from the light source 91 is used instead of the high frequency detection switch used in the examples shown in FIGS. 15 and 16.
As shown in FIG. 17, an opening 92 for transmitting light is provided at the center of the gear block 311, and the light detection switch controller Sb is disposed below the opening 92. With this configuration, the high-frequency current is switched on only in the gear block 311 that has received the light output from the light source 91. The operating power source of the light detection switch control unit Sb is not particularly limited, and for example, a technique such as laying a DC power source wiring, a built-in battery, or a stored photovoltaic voltage can be employed.

  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 scope that can achieve the object of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, it is assumed that the electrode pair is not in contact, but it is sufficient if contact is made through an insulator and the electrical proximity state is maintained even if it is not completely contactless. It is possible to ensure the junction capacity. That is, even if some of the electrode pairs are physically in contact with each other, sufficient electric power can be supplied as long as they are electrically insulated.

  The switches that can be employed in the power supply system of the present invention are not limited to the switches illustrated in FIGS. For example, any switch that can detect mechanical vibration, mechanical load, magnetic field, and the like can be employed.

  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 machine element using a gear.

In summary, the power supply system to which the present invention is applied only needs to have the following configuration, and can take various embodiments.
That is, the power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission unit (for example, the rack gear 31 in FIG. 4) that transmits electric power from an AC power supply having a predetermined wavelength;
A power receiving electrode (power receiving electrode 22 in FIG. 1) is provided, and a portion facing the power receiving electrode in the power transmitting unit is defined as a power transmitting electrode (power transmitting 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 via a plurality of junction capacitances and supplies the power to a load;
With
The power receiving electrode is formed of a conductive 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 to mesh with the teeth.
Thereby, electric power can be supplied to the machine element using the gear via the gear.

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

In addition, a conductor (for example, the conductive cover 43 in FIG. 5) arranged 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 capacitors formed by at least one of the power transmission electrode and the power reception electrode and the conductor.
Thereby, the junction capacity can be further increased. In addition, the amount of electromagnetic energy generated can be reduced.

Further, the power transmission electrode can be formed of a conductive gear member,
The power receiving unit has irregularities corresponding to the teeth of the gear member, and can be arranged to mesh with the teeth.
Thereby, the polarity of the electrode is reversed, and power can be transmitted without any problem.

The power supply system to which the present invention is applied is
A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
Can comprise
The power receiving electrode can be formed of a conductive 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) that has irregularities corresponding to the teeth of the pulley and is arranged to mesh with the teeth.
Thereby, the junction capacitance formed between the power transmission unit and the power reception unit can be further increased.

1: power transmission unit, 2: power reception unit, 3: gear unit, 4: bearing unit, 11, 21: parallel resonance circuit, 12: power transmission electrode, 13: sensing electrode, 14: moving electrode, 22: power reception 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: Driver, 50: Flange, 51: Bearing, 52: Rotating shaft, 53: Slide 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: Tooth cloth 303: Mesh electrode, 304: Conductive wire, 305: Tensile body, 306: Contact part, 310, 314: Rack gear top part, 311: Gear block, 312, 313: Rack gear valley part, 401: Gear plate, 403: Bobbin 404: fixing screw, 501: outer conductor, 502: inner conductor

Claims (6)

A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power receiving electrode is formed of a conductive gear member,
The power transmission unit has irregularities corresponding to the teeth of the gear member, and is arranged to mesh with the teeth.
Power supply system. The teeth of the gear member are composed of a plurality of plate-like members extending radially from the vicinity of the center of the gear member, and an elastic body is filled between the adjacent plate-like members.
The power supply system according to claim 1. A conductor disposed 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 capacitors formed by at least one of the power transmission electrode and the power reception electrode and the conductor.
The power supply system according to claim 1 or 2. The power transmission electrode is formed of a conductive gear member,
The power receiving unit has irregularities corresponding to the teeth of the gear member, and is arranged to mesh with the teeth.
The power supply system according to any one of claims 1 to 3. A power supply system using electric field coupled power transmission technology,
A power transmission unit for transmitting power from an AC power source of a predetermined wavelength;
A power receiving electrode is provided, and a portion facing the power receiving electrode of the power transmitting unit is used as a power transmitting electrode to receive power from the power transmitting unit through a plurality of junction capacitors formed by the power transmitting electrode and the power receiving electrode. A power receiving unit that supplies power to the load,
With
The power receiving electrode is formed of a conductive pulley,
The power transmission unit is a timing belt that has irregularities corresponding to the teeth of the pulley and is arranged to mesh with the teeth.
Power supply system. The power transmission electrode is formed of a conductive pulley,
The power receiving unit is a timing belt that has irregularities corresponding to the teeth of the pulley and is arranged to mesh with the teeth.
The power supply system according to claim 5.

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