JP2006174548A - Collector wheel for cordless power transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To establish the contact of a receiving electrode of an on-floor object with a transmission electrodes arranged on a floor, to surely establish the connection and separation of the receiving electrode to and from the transmission electrode, and to prevent the complication of the structure of the on-floor object. <P>SOLUTION: This collector wheel 13 is installed to the on-floor object 10 that self-travels on the power feeding floor with a plurality of the transmission electrodes arranged on the floor connected to underfloor wiring. The collector wheel comprises transmission function parts 19 each of which is constituted of a circular frame 14 arranged with a plurality of the receiving electrodes 16 on grounding surfaces 15 that are external peripheral faces having friction resistance not causing an unnecessary slide between the floor and the receiving electrodes, and a wheel 17 rotatably assembled to a wheel shaft 18 immovably fixed to a vehicle body 11, contains an in-wheel motor 20 composed of a rotor fixed to the wheel 17 and a stator fixed to the wheel shaft 18 so as to face the rotor, and performs the transmission and reception of a signal including power between the vehicle body 11 and the collector wheel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a current collecting wheel for cordless power transmission that directly collects power from a floor surface to an object on the floor, which is a self-propelled electric product located on the floor surface, and generates a rotational driving force. It is.

  Power supply to self-propelled mobile electrical appliances such as automatic vacuum cleaners and surveillance robots can be achieved by connecting the electrical outlets on the wall and electrical appliances with cables. The possible range is limited by the length of this cable, and it cannot be flexibly redesigned, and the cable that always comes with mobile electrical products sometimes interferes with handling, and the appearance of mobile electrical products There was dissatisfaction to make appearance worse.

  In addition, mobile electric products that use a battery as a power source without providing a cable have been unsatisfactory because the mounted battery is heavy and bulky, and there is an unsatisfactory limit in reducing the size and weight.

In order to eliminate this dissatisfaction, a large number of electrode plates are arranged at predetermined intervals on the floor, and each of these electrode plates is alternately changed in polarity and connected to a power source so that the electrical products on the floor can be used. A plurality of current collectors that are insulated from each other, wherein the current collectors are in contact with one polarity electrode plate, and at the same time, another current collector is in contact with the other polarity electrode plate. Arranged so that the distance between the electrode plates is larger than the contact range of the current collector so that one current collector does not contact two electrode plates of different polarities at the same time. A configuration is disclosed in which power can be supplied cordlessly to the electrical product.
JP 09-028922 A

  However, in the above-described prior art, the contact of each current collector of the object on the floor, which is an electrical product on the floor, with respect to a large number of electrode plates arranged on the floor is a sliding contact. As a result of the movement, the current collector scrapes off the dust on the floor surface, thereby causing a contact failure and possibly causing a fire.

  Also, since the contact of the current collector with the floor surface is sliding contact, if the floor surface is uneven, the current collector is caught by the floor surface unevenness, and a catching force is generated between them. There has been a serious problem that the smoothness of the movement of the objects on the floor of the floor has deteriorated over time, and in some cases, the current collector is damaged.

  Furthermore, since the traveling motion of the object on the floor is achieved by rotating and driving at least one of the moving wheels by the motor provided on the body (vehicle body) of the object on the floor, the main body has to be equipped with the motor. However, the structure is complicated and the size is increased, and a transmission means for transmitting the rotational force is required between the main body and the moving wheel, which complicates the structure of the entire object on the floor. It was.

  Therefore, the present invention was devised to solve the above-described problems in the prior art, and the contact of the current collector (power receiving electrode) of the object on the floor with the electrode plate (power transmitting electrode) disposed on the floor surface, Achieving this by rotating contact and making the wheels themselves that have a current collecting function to have a drive function as a technical issue, so that power can be transmitted without scraping dirt on the floor and being caught by irregularities on the floor. An object of the present invention is to safely and reliably achieve the contact and separation of the power receiving electrode with respect to the electrode and to prevent the structure of the object on the floor from becoming complicated due to the drive function part for movement.

Of the present invention that solves the above technical problems,
A plurality of power transmission electrodes are arranged on the floor surface, at least an underfloor wiring having a power line is provided, the power transmission electrodes are connected to the underfloor wiring, and a distance between each power transmission electrode is provided on an object on the floor located on the floor surface. It is a current collecting wheel for cordless power transmission that supplies power to the objects on the floor that are self-propelled on the floor surface from the power supply floor that is set to a value where the remote power transmission electrode contacts the receiving electrode separately and simultaneously. thing,
A circular frame in which a plurality of power receiving electrodes are arranged in contact with the floor surface over the entire circumference on the ground surface, which is an outer peripheral surface having a frictional resistance that does not cause unnecessary slippage between the floor surface and the floor surface. ,
Having a wheel that is rotatably assembled to an axle that is immovably fixed to a vehicle body having a load for performing operations such as steering and monitoring;
An in-wheel motor comprising a rotor fixed to the wheel and a stator fixed to the axle facing the rotor;
Providing a transmission function unit that transmits and receives signals including electric power between the vehicle body,
It is in.

  In the first aspect of the present invention, the interval between the power transmission electrodes is set to a value at which the remote power transmission electrodes are in contact with each other separately and simultaneously with respect to the pair of power reception electrodes provided on the object on the floor. Therefore, a pair of power transmission electrodes and power reception electrodes are always in one-to-one contact at the same time, and reliable power supply to an object on the floor is achieved.

  The current collecting wheel has a frictional resistance that does not cause unnecessary slipping between the ground surface and the floor surface, which is the outer peripheral surface of the circular frame in which a plurality of power receiving electrodes are arranged over the entire circumference. When an object on the floor travels on the floor surface, it always rotates and moves without sliding on the floor surface and without idling.

  For this reason, there is almost no slippage displacement between the ground contact surface and the floor surface of the current collecting wheel, which causes the problem that the power receiving electrode is damaged by being caught by the power transmission electrode or the unevenness on the floor surface. There is no occurrence.

  The in-wheel motor is configured such that a rotor is fixed to a wheel rotatably mounted on an axle fixedly fixed to the vehicle body, and the stator is fixedly fixed to the axle facing the rotor. Therefore, when electric power is supplied to the rotor, a rotational force is generated in the rotor, that is, the wheel by the action of the generated magnetic force, and the current collecting wheel is driven to rotate.

  Therefore, the current collecting wheel itself is directly driven to rotate, and there is no need to provide a complicated transmission mechanism with the vehicle body.

  The transmission function unit provided between the vehicle body and the current collecting wheel is a part that achieves transmission of a power signal or / and a control signal between the vehicle body and the current collecting wheel, and at least the in-wheel motor. The operation is controlled in accordance with an operation control signal given from the vehicle body side to the current collecting wheel side via the transmission function unit.

  The invention described in claim 2 is obtained by adding a rectification unit that rectifies the power received by the power receiving electrode to DC power in a certain direction in addition to the configuration of the invention described in claim 1.

  In the invention described in claim 2, since the power received by the power receiving electrode is immediately rectified to DC power in a certain direction, it is only necessary to handle power having a constant polarity on the object on the floor. Power handling becomes easy, and in particular, the structure of the transmission function unit becomes simple.

  According to a third aspect of the present invention, in the configuration of the first aspect of the invention, a rectifier that rectifies the power received by the power receiving electrode into direct-current power in a certain direction, and a power storage that stores the power rectified by the rectifier And a control unit that controls supply of electric power from the power storage unit or / and the rectifying unit to the in-wheel motor.

  In the invention according to claim 3, power is received by one current collecting wheel, rectification of the received power to DC power, and supply and storage of the rectified DC power to the in-wheel motor. It is possible to perform all of the power storage to the power storage unit and the supply of the stored power from the power storage unit to the in-wheel motor, so that the continuous rotating operation can be performed only by the current collecting wheel, thereby the object on the floor The amount and type of signals exchanged between the vehicle body and the current collecting wheel can be greatly reduced.

  The invention described in claim 4 adds to the configuration of the invention described in claim 1, 2 or 3 that each receiving electrode is arranged in a form in which at least two pairs are in contact with the floor surface simultaneously. Is.

  In the invention according to claim 4, at least a pair of power receiving electrodes that are in contact with the floor surface at the same time are separated from the pair of power receiving electrodes. Since the values are set to be in contact with each other at the same time, it is possible to reliably contact the power transmission electrodes at the same time, thereby reliably achieving power supply in one current collecting wheel.

  According to a fifth aspect of the present invention, in the configuration of the first, second, third, or fourth aspect, a pair of forward and reverse rectifier elements is connected to each power receiving electrode at one terminal, and the other of the rectifier elements is The rectifier is configured by connecting the terminals in common with the same polarity.

  In the invention according to claim 5, since the large number of power receiving electrodes are grouped into two groups via the rectifying unit, the connection configuration to the other circuit components of the large number of power receiving electrodes is simplified, and each power receiving electrode Since a rectifying element is always interposed between the electrodes, there is no risk of short-circuiting between the power transmitting electrodes by the power receiving electrode, and power is supplied from the power source to the power receiving electrodes other than the power receiving electrode in contact with the power transmitting electrode. Since there is nothing, there is almost no risk of electric shock.

  In the invention described in claim 6, in the configuration of the invention described in claim 1, 2, 3, 4 or 5, the transmission function part that is electrically coupled to the vehicle body is constituted by a sliding operation part such as a slip ring. , Is added.

  In the invention described in claim 6, since it is possible to transmit and receive large power between the power collecting wheel and the vehicle body, power exchange between the power collecting wheel and the vehicle body of the received power is possible. It is simple and allows a common drive with a single power supply.

  In the invention described in claim 7, in the configuration of the invention described in claim 1, 2, 3, 4 or 5, the transmission function unit electrically coupled to the vehicle body is configured by a wireless operation part such as transmission / reception of radio waves. , Is added.

  In the invention according to claim 7, since the transmission function part can be configured without the sliding operation part, there is no deterioration or loss of the transmission function due to mechanical wear or destruction, and the transmission / reception of the signal. Can be achieved stably and safely.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the invention according to claim 1, the pair of power receiving electrodes that perform the power receiving operation are arranged in a form in which at least two pairs are in contact with the floor surface at the same time, and between the floor surface Since the rotary movement is performed without causing any sliding displacement, the pair of power transmission electrodes and the power reception electrodes are always in a one-to-one contact at the same time, whereby a stable power feeding operation can always be obtained.

  Since the drive operation of the in-wheel motor is the rotation operation of the current collecting wheel as it is, the conversion of electric power to rotate the current collecting wheel is achieved very efficiently, and this is necessary for objects on the floor. Therefore, it is easy to improve the safety of the entire system consisting of the combination of the power supply floor and the object on the floor, and the transmission structure part of the rotational force is not required. As a result, the structure of the object on the floor is simplified, and the size of the object on the floor is easily reduced.

  In the second aspect of the invention, since it is easy to handle the received power on the object on the floor, the structure of the transmission function unit can be simplified, and the structure of the electrical connection of the object on the floor is simplified. It becomes.

  In the invention according to claim 3, since all the necessary components for rotational driving are provided on the current collecting wheel, signals exchanged between the vehicle body of the object on the floor and the current collecting wheel are provided. The amount and type can be greatly reduced, which allows easy and stable handling of objects on the floor.

  In the invention according to claim 4, since the power feeding in one current collecting wheel is reliably achieved, the degree of unevenness in the amount of received power among the plurality of current collecting wheels is kept within a small allowable range. As a result, stable operation of objects on the floor can be obtained.

  In the invention described in claim 5, since the connection configuration with respect to other circuit components of a large number of power receiving electrodes is simplified, the manufacturing and handling are facilitated, and the power transmitting electrodes are short-circuited between the power receiving electrodes by the rectifying element. There is no fear, and since no power is supplied from the power source to the power receiving electrodes other than the power receiving electrode in contact with the power transmitting electrode, there is almost no risk of an electric shock and high safety can be obtained.

  In the invention according to claim 6, since it is possible to use a single power source for the object on the floor, the power control of the object on the floor can be achieved easily and accurately, whereby efficient power of the object on the floor can be achieved. Control can be gained.

  In the invention according to claim 7, since the transmission function unit does not deteriorate or lose the transmission function due to mechanical wear or destruction, and signal transmission / reception can be stably and safely achieved. The reliability of the movement of the object is improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of the overall configuration of a basic embodiment of a cordless power supply system in which the present invention is implemented, and a large number of power transmission electrodes 3 are arranged on a floor surface 2 in a fixed arrangement pattern (FIG. 1). 2), each power transmission electrode 3 is connected to the underfloor wiring 7 having the power line 8 connected to the power source by the selector 4 in an intermittent manner, and on the floor surface 2 of the power supply floor 1, It is configured by a combination with an object 10 on the floor that is placed so as to be capable of self-propelled movement by electric power and is fed with the power receiving electrode 16 in contact with the power receiving electrode 16.

  The power supply floor 1 is a floor under a flat floor surface 2 composed of a plurality of power transmission electrodes 3 made of a conductive material and arranged in a fixed arrangement pattern in a matrix arrangement at fixed intervals, a power line 8 and a ground line 9. The wiring 7 and a large number of selectors 4 that connect the power transmission electrodes 3 to the underfloor wiring 7 in an intermittent manner.

  Each selector 4 receives the power supply request signal transmitted from the switching contact 6 for intermittently connecting the power transmission electrode 3 and the underfloor wiring 7 and the power supply request signal transmission unit 24 of the approaching floor object 10, and according to this received signal The power supply request signal receiving unit 5 that switches and sets the switching state of the switching contact 6.

  In other words, the selector 4 has a basic operation of switching and controlling the intermittent connection of the power transmission electrode 3 to the power line 8 in accordance with the power supply request signal from the approaching floor object 10. As long as the power supply request signal is not input to 4, that is, unless the power receiving electrode 16 contacts or approaches the power transmitting electrode 3, it is not connected to the power line 8 and is at the ground potential.

  A floor object 10 that travels on the floor 2 (see FIGS. 5 to 8) has a vehicle body 11, a moving wheel 12 for travel, and a large number of power receiving electrodes 16 on a grounding surface 15 that is an outer peripheral surface. A current collecting wheel 13, an in-wheel motor 20, a power storage unit 23 composed of an electric double layer capacitor or a small battery, a rectifying unit 22 that rectifies the received power into DC power in a certain direction, A control unit 21 that mainly controls the supply of electric power to the in-wheel motor 20, a transmission function unit 19 that achieves transmission of a signal including electric power between the vehicle body 11 and the current collecting wheel 13, and a power supply request signal transmission A portion 24 and a load 25 are included.

  The current collecting wheel 13 (see FIG. 3 and FIG. 4) is a combination of a circular frame 14 such as a tire and a wheel 17 constituting a rotatable assembly portion to an axle 18 that is fixedly fixed to the vehicle body 11, A large number of power receiving electrodes 16 are arranged on the ground surface 15 that is the outer peripheral surface of the circular frame 14 in a state where the power receiving electrodes 16 are separated from each other. The ground surface 15 on which the power receiving electrodes 16 are arranged is a floor surface. 2 and exhibiting frictional resistance to such an extent that unnecessary slip does not occur.

  FIG. 3 is an overall perspective view showing a structural example of the current collecting wheel 13 according to the present invention configured using a general tire as the circular frame 14, and the entire circumference of the ground contact surface 15 that is the outer peripheral surface of the circular frame 14. A number of power receiving electrodes 16 are intermittently arranged vertically and horizontally.

  Each power receiving electrode 16 is formed of a conductive material such as a metal wire, conductive fiber, or conductive resin. As shown in FIG. 4, the power receiving electrode 16 is formed on a part of the wall portion forming the grounding surface 15 of the circular frame 14. A group of conductive materials that are firmly assembled and fixed in a state where the wall portion is protruded are integrally connected and fixed on the inner surface of the circular frame 14 by solder or the like.

  The in-wheel motor 20 is composed of a rotor fixed to at least one wheel 17 of the current collecting wheel 13 and a stator fixed to the axle 18 so as to face the rotor. , The rotor is rotationally displaced with respect to the stator fixed to the axle 18 by the electromagnetic action between the rotor and the stator, so that the current collecting wheel 13 is moved relative to the axle 18. It rotates.

  The control unit 21 distributes the DC power received and rectified by the rectification unit 22 to the in-wheel motor 20 and the power storage unit 23, supplies the power from the power storage unit 23 to the in-wheel motor 20, and receives the received DC power. The power and the stored power of the power storage unit 23 are monitored, and in some cases, the operation according to the operation program for the object 10 on the floor and the operation control of the power supply request signal transmission unit 24 and the load 25 are performed.

  The rectifying unit 22 is configured by connecting a pair of forward and reverse rectifying elements to each power receiving electrode 16 at one terminal and connecting the other terminal of each rectifying element with the same polarity in common, and receiving power in a certain direction. The power is rectified to DC power, and this rectified power is sent to the control unit 21.

  The power storage unit 23 supplies power for operation to the in-wheel motor 20 in a state where the object 10 on the floor is electrically disconnected from the power line 8. For example, the power receiving electrode 16 is separated from the power transmitting electrode 3, and In a non-powered state until contact with the power transmission electrode 3, power is supplied to the in-wheel motor 20 by discharging to continue the traveling movement of the object 10 on the floor, and the power receiving state where the power receiving electrode 16 is in contact with the power transmission electrode 3. Sometimes, it stores its own power together with the power supply to the in-wheel motor 20.

  The power supply request signal transmission unit 24 arranges a signal transmission part so as to be located in the vicinity of the floor 2 immediately in front of the current collecting wheel 13, and transmits a power supply request signal from this signal transmission part, thereby collecting the train The power transmission electrode 3 located immediately before the wheel 13 is connected to the power line 8 by the action of the power supply request signal receiving unit 5 of the selector 4 to make it possible to supply power.

  As a combination of the power supply request signal receiving unit 5 and the power supply request signal transmitting unit 24, it is effective to use an IC tag as the power supply request signal receiving unit 5 and a reader / writer as the power supply request signal transmitting unit 24. .

  FIG. 5 shows a first structural example of the object 10 on the floor. Two current collecting wheels 13 are attached to one vehicle body 11, and the in-wheel motor 20 is attached to each of the current collecting wheels 13. In addition to the control unit 21, the power storage unit 23, and the load 25, each of the current collecting wheels is disposed in the vehicle body 11. The rectifying unit 22 and the power supply request signal transmitting unit 24 are attached to correspond to the No. 13.

  In this first structural example, the power received by the power receiving electrode 16 is directly sent to the corresponding rectifying unit 22 of the vehicle body 11 via the transmission function unit 19 and is rectified to DC power by the rectifying unit 22. The control unit 21 sends the electric power to the in-wheel motor 20 of the current collecting wheel 13 via the power storage unit 23 and / or the transmission function unit 19.

  In the case of this first structural example, the structure of the current collecting wheel 13 is very simple, but a large number of power receiving electrodes 16 of both the current collecting wheels 13 must be connected to the rectifying unit 22 of the vehicle body 11. The configuration of the functional unit 19 and the wiring configuration are extremely complicated.

  In addition to the received power distribution control described above, the control unit 21 in the first structural example controls the amount of power supplied to the in-wheel motor 20, the operation control of the power supply request signal transmission unit 24, and the operation control of the load 25. I do.

  FIG. 6 shows a second structural example of the object 10 on the floor. In the first structural example, the rectifying unit 22 attached to the vehicle body 11 is simply attached to the corresponding current collecting wheel 13. Other configurations are the same.

  In the second configuration example, the power received by the power receiving electrode 16 is immediately rectified to DC power, so that the transmission function unit 19 transmits only DC power. The operation of the control unit 21 is the same as that in the first structure example.

  In the case of this second structure example, each transmission function unit 19 handles only the rectified DC power, so that the configuration is very simple, and the number of wirings required is small, so the wiring configuration is very simple. On the other hand, since the rectifying unit 22 must be installed, the structure of the current collecting wheel 13 is complicated accordingly.

  FIG. 7 shows a third structural example of the object 10 on the floor. A control unit 21, a rectifying unit 22, and a power storage unit 23 are connected to each collecting wheel 13 to which the power receiving electrode 16 and the in-wheel motor 20 are attached. The control device 26, the load 25, and the power supply request signal transmission unit 24 are attached to the vehicle body 11, and the control unit 21 and the control device 26 transmit signals including power via the transmission function unit 19. It is connected so that it can send and receive.

  In the third structural example, the control unit 21 distributes the DC power received and rectified by the rectification unit 22 to the in-wheel motor 20 and the power storage unit 23, and the power in-wheel of the power storage unit 23. Although the supply to the motor 20 is controlled, the control operation of the control unit 21 is performed according to a command from the control device 26.

  That is, the control unit 21 constantly monitors the rectified DC power and the power of the power storage unit 23, sends the data as a data signal to the control device 26, and controls the operation of the power supply request signal transmission unit 24 and the load 25. The device 26 sends a command signal to the control unit 21 in accordance with a data signal from the control unit 21 and a program, and is insufficient from one current collecting wheel 13 to the other current collecting wheel 13 as necessary. In some cases, power is transferred, and operation control of the power supply request signal transmission unit 24 and the load 25 is performed.

  FIG. 8 shows a fourth structural example of the object 10 on the floor. The transmission function unit 19 has a wireless structure using radio waves, electromagnetic waves, light, lasers, ultrasonic waves, etc. This is the same as the third structural example.

  In the fourth structural example, due to the structure of the transmission function unit 19, control signals, command signals, and data signals are transmitted / received between the vehicle body 11 and the current collecting wheel 13, but large power is not transmitted / received. Since there is no sliding contact portion such as a slip ring, it is not impossible to send and receive signals due to mechanical deterioration, and high reliability can be obtained.

  Note that the number of current collecting wheels 13 attached to the object 10 on the floor is not limited to two. One of the three moving wheels 12 is the current collecting wheel 13 or all four moving wheels 12 are used. Various combinations are possible, such as a current collecting wheel 13.

1 is an overall configuration example diagram showing a basic configuration example of a cordless power transmission system implementing the present invention. It is a surface figure which shows the structural example of the floor surface of the electric power supply floor of the system by which this invention is used. It is an external appearance perspective view of the Example of the current collection wheel of this invention attached to an object on a floor. FIG. 4 is an enlarged view of a main part half longitudinally of the embodiment shown in FIG. 3. It is explanatory drawing of the object on a floor which shows the 1st structural example of the current collection wheel of this invention. It is explanatory drawing of the object on the floor which shows the 2nd structural example of the current collection wheel of this invention. It is explanatory drawing of the object on a floor which shows the 3rd structural example of the current collection wheel of this invention. It is explanatory drawing of the object on the floor which shows the 4th structural example of the current collection wheel of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Power supply floor 2; Floor surface 3; Power transmission electrode 4; Selector 5; Feeding request signal receiving part 6; Switching contact 7; Underfloor wiring 8; Power line 9; Ground line 10; Floor object 11; Car body 12; Current collecting wheel 14; circular frame 15; ground surface 16; power receiving electrode 17; wheel 18; axle 19; transmission function unit 20; in-wheel motor 21; control unit 22; rectification unit 23; power storage unit 24; Unit 25; load 26; control device

Claims (7)

  A number of power transmission electrodes (3) are arranged on the floor (2), an underfloor wiring (7) having at least a power line (8) is provided, the power transmission electrode (3) is connected to the underfloor wiring (7), The distance between the power transmission electrodes (3) is set so that the separated power transmission electrodes (3) are separated from the pair of power reception electrodes (16) provided on the floor object (10) located on the floor surface (2). A power collecting floor (13) for cordless power transmission that supplies power from the power supply floor (1) set at the same time to the floor object (10) that is self-propelled on the floor (2). Then, a plurality of power receiving electrodes (16) are provided on the ground surface (15), which is an outer peripheral surface having a frictional resistance that does not cause unnecessary slip between the floor surface (2) and the floor surface. The circular frame (14) arranged in contact with (2) and a load (such as steering and monitoring) ( 5) a wheel (17) that is rotatably attached to an axle (18) fixedly fixed to a vehicle body (11) having 5), a rotor fixed to the wheel (17), and the rotation An in-wheel motor (20) comprising a stator fixed to the axle (18) facing the child, and a transmission function unit for transmitting and receiving signals including electric power to and from the vehicle body (11) A current collecting wheel for cordless power transmission provided with (19).   The current collecting wheel for cordless power transmission according to claim 1, further comprising a rectifying unit (22) for rectifying the power received by the power receiving electrode (16) into DC power in a certain direction.   A rectifying unit (22) that rectifies the power received by the power receiving electrode (16) into DC power in a certain direction, a power storage unit (23) that stores the power rectified by the rectifying unit (22), and the power storage unit The power collecting wheel for cordless power transmission according to claim 1, further comprising: a control unit that controls supply of electric power from the rectifying unit to the in-wheel motor.   The current collection wheel for cordless power transmission according to claim 1, 2 or 3, wherein each power receiving electrode (16) is arranged in such a manner that at least two of the power receiving electrodes (16) are in contact with the floor surface (2) simultaneously.   A pair of forward and reverse rectifier elements are connected to each power receiving electrode (16) at one terminal, and the other terminal of each rectifier element is connected in common with the same polarity to form a rectifier (22). 3. A current collecting wheel for cordless power transmission according to 3 or 4.   6. A collection train for cordless power transmission according to claim 1, wherein the transmission function part (19) electrically coupled to the vehicle body (11) is constituted by a sliding operation part such as a slip ring. ring.   6. A collection train for cordless power transmission according to claim 1, wherein the transmission function part (19) electrically coupled to the vehicle body (11) is constituted by a wireless operation part such as transmission and reception of radio waves. ring.

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