JP6544129B2 - Contactless power supply device and contactless power transmission device - Google Patents

Description

  The present invention relates to a noncontact power feeding device and a noncontact power transmission device.

  In recent years, a charging system has been proposed for charging a storage battery mounted on a moving object by non-contact power transmission technology of non-contact power transmission from an external power source using an electromagnetic induction method or a magnetic resonance method. For example, by supplying electric energy from an external power supply to a feeding coil installed in a parking area of a parking lot, the receiving coil installed in a vehicle such as an electric car generates electric energy by electromagnetic induction or magnetic field resonance, and receives electricity. There is a charging system which stores electric energy from a coil in a storage battery and charges it. Also, in the industrial equipment field, by supplying electric energy from the external power supply to the feeding coil installed in the feeding area, the receiving coil installed in a moving object such as a transportation device for factories is based on electromagnetic induction or magnetic resonance. There is a charging system that generates electrical energy and stores the electrical energy from the power receiving coil in a storage battery for charging.

  In this charging system, when foreign matter such as metal is mixed between the power transmission coil and the power reception coil, a loss in transmission efficiency is caused, and thus there is an increasing demand for technology for removing the foreign matter. In response to such a request, for example, according to Patent Document 1, the movable portion and the movable portion move horizontally on the guide rail installed on the ground by being pushed by the moving vehicle, and are interlocked with the movement of the movable portion There has been proposed a foreign matter removing mechanism provided with a movable cleaning unit which moves along the upper surface of the feeding coil.

JP, 2014-27813, A

  However, in the technique disclosed in Patent Document 1, since the movable cleaning unit moves horizontally on the guide rail, the guide rail and the movable cleaning unit installed on the ground require straightness. Therefore, parallelism with the guide rail in the approach to the non-contact power feeding apparatus of the moving body mounted with the non-contact power receiving apparatus is required, and there is a problem that the accuracy of the approach angle to the feeding area is required. Further, in the technique of Patent Document 1, two guide rails for supporting both ends of the movable cleaning portion are required, so there is also a problem that the size of the apparatus is increased.

  Therefore, the present invention has been made in view of the above-mentioned problems, and it is possible to suppress the enlargement of the device, and to perform non-contact power supply capable of reliably removing foreign matter even if the accuracy of the approach angle of the moving body to the power supply area is poor. An object is to provide an apparatus and a contactless power transmission apparatus.

  A non-contact power feeding device according to the present invention includes a power feeding unit disposed in a power feeding area, and a foreign matter removing unit that removes foreign matter from above the feeding unit. The foreign matter removing unit moves in response to a pressing force. The receiving unit includes a sweeping unit that wipes the upper surface of the power feeding unit, and a support unit that connects the receiving unit and the sweeping unit and rotatably supports the receiving unit and the sweeping unit in the in-plane direction. The apparatus is characterized in that it moves on the feeding unit in conjunction with the movement of the receiving unit.

  According to the present invention, the foreign matter removing unit connects the receiving unit that moves by receiving the pressing force, the sweeping unit that wipes the upper surface of the power feeding unit, the receiving unit and the sweeping unit, and the receiving unit and the sweeping unit in the in-plane direction And the sweep-out unit moves on the feeding unit in conjunction with the movement of the receiving unit. Therefore, foreign matter removal can be realized with a simple configuration using the principle of leverage with the support portion as the fulcrum, the receiving portion as the force point, and the sweep-out portion as the action point, thus downsizing can be achieved. In addition, since the receiving portion is moved by the pressing force with the support portion as the fulcrum, the sweeping portion can be moved even if the entering angle of the moving body with respect to the receiving portion varies somewhat. Even if the accuracy of the approach angle to the feeding area is poor, foreign matter can be reliably removed. As a result, it is possible to provide a non-contact power feeding device capable of reliably removing foreign matter while suppressing an increase in size of the device, even if the accuracy of the approach angle of the moving body to the power feeding area is poor. That is, even if the movable body enters in a state of being inclined with respect to the receiving portion of the foreign matter removing portion, the foreign matter can be removed.

  Preferably, the foreign matter removing portion may further include an extendable spring portion connected to a surface of the receiving portion opposite to the surface receiving pressure. In this case, when the moving body enters the power feeding area, the spring portion connected to the receiving portion is compressed by the pressing force received from the moving body. In addition, when the moving body leaves the feeding area, the pressing force from the moving body disappears, and the foreign matter removing portion is automatically returned to the initial state by the restoring force of the spring portion connected to the receiving portion. When the body enters the feeding area and performs the feeding operation, it is possible to start a foreign matter removing operation in which the sweep-out unit cleans the upper surface of the feeding unit. In addition, since the foreign matter removing unit is automatically returned to the initial state by the restoring force of the spring portion, it is possible to reduce the number of driving devices such as an actuator for returning the foreign matter removing unit to the initial state.

  A non-contact power transmission device according to the present invention includes the non-contact power feeding device and the non-contact power reception device mounted on a moving body. According to the present invention, it is possible to provide a non-contact power transmission device capable of reliably removing foreign matter while suppressing increase in size of the device, even if the accuracy of the approach angle of the moving body to the feed area is poor.

  Preferably, the movable body has a drive wheel for propelling the movable body, and the foreign matter removing portion of the non-contact power feeding device has a rotatable roller portion on the surface which receives the pressing force of the receiving portion; When receiving the pressing force from the moving body, it may be disposed at a position where it abuts on the drive wheel. In this case, when the moving body enters the feeding area, the driving wheel of the moving body comes in contact with the roller portion of the receiving portion, so that the rotational force vector of the driving wheel of the moving body is converted into roller rotational force. Since only the driving force along the traveling direction is applied to the receiving portion, the wear of the receiving portion due to the frictional force between the driving wheel of the moving body and the receiving portion is suppressed, and the durability of the tire receiving portion can be improved.

  According to the present invention, there is provided a non-contact power feeding device and a non-contact power transmission device capable of reliably removing foreign matter even if the accuracy of the approach angle of the moving body to the feeding area is poor while suppressing the enlargement of the device. be able to.

It is a model block diagram which shows the contactless energy transfer apparatus which concerns on 1st Embodiment of this invention with a load. It is the model top view which showed the structure of the foreign material removal part of the non-contact electric power supply in the non-contact electric power transmission apparatus which concerns on 1st Embodiment of this invention, and the electric power feeding part. It is the model side view which showed the structure of the foreign material removal part of the non-contact electric power supply in the non-contact electric power transmission apparatus which concerns on 1st Embodiment of this invention, and the electric power feeding part. It is a partially expanded side view schematically showing an example of the configuration of the sweep-out portion of the non-contact power feeding device in the non-contact power transmission device according to the first embodiment of the present invention. It is a partially expanded side view schematically showing an example of the sweep-out portion configuration of the non-contact power feeding device in the non-contact power transmission device according to the first embodiment of the present invention. The contactless energy transfer apparatus which concerns on 1st Embodiment of this invention WHEREIN: It is a schematic diagram which shows the mechanical operation | movement of the foreign material removal part at the time of a mobile body approach start. The contactless energy transfer apparatus which concerns on 1st Embodiment of this invention WHEREIN: It is a schematic diagram which shows the mechanical operation | movement of the foreign material removal part in process of mobile object approach. In the contactless energy transfer system concerning a 2nd embodiment of the present invention, it is a mimetic diagram showing mechanical operation of a foreign substance removal part before mobile body approach start. The contactless energy transfer apparatus which concerns on 2nd Embodiment of this invention WHEREIN: It is a schematic diagram which shows the mechanical operation | movement of the foreign material removal part in process of moving body entry. It is a schematic top view which shows a part of foreign substance removal part of the non-contact electric power supply in the non-contact electric power transmission apparatus which concerns on 3rd Embodiment of this invention seen from the upper surface of the mobile body. It is a schematic side view which shows a part of contactless energy transfer apparatus which concerns on 3rd Embodiment of this invention seen from the direction orthogonal to the approach direction of a mobile body.

  A mode (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. In the description, the same elements or elements having the same function will be denoted by the same reference symbols, without redundant description.

First Embodiment
First, with reference to FIG. 1, the whole structure of the non-contact electric power transmission apparatus A which concerns on 1st Embodiment of this invention is demonstrated. FIG. 1 is a schematic configuration view showing a contactless power transmission device according to a first embodiment of the present invention together with a load.

  As shown in FIG. 1, the non-contact power transmission device A includes a non-contact power feeding device A1 and a non-contact power reception device A2. The non-contact power transmission device A according to the present embodiment is applied to a charging facility for a mobile. Here, as a mobile body to which the contactless power transmission device A is applied, an electric vehicle (BEV: Battery Electric Vehicle), a hybrid vehicle (PHEV: Plug-in Hybrid Electric Vehicle), etc. using the power of a secondary battery Transport devices for vehicles, factories, transport devices for civil engineering or construction, etc. may be mentioned.

  As shown in FIG. 1, the non-contact power feeding device A1 includes a power supply 10, an inverter 20, a power feeding unit 30, and a foreign matter removing unit 40. As shown in FIG. 1, the non-contact power reception device A2 includes a power reception unit 50 and a rectification unit 60. In addition, non-contact electric power supply apparatus A1 is mounted in the electric power feeding installation installed in an electric power feeding area, and non-contact power reception apparatus A2 is mounted in a mobile body.

  The power supply 10 supplies DC power to the inverter 20 described later. The power source 10 is not particularly limited as long as it outputs DC power, and is a DC power source obtained by rectifying and smoothing a commercial AC power source, a secondary battery, a solar DC power source, or a switching power source such as a switching converter Etc.

  The inverter 20 has a function of converting input DC power supplied from the power supply 10 into AC power. In the present embodiment, the inverter 20 converts input DC power supplied from the power supply 10 into AC power, and supplies the AC power to the power supply unit 30 described later. The inverter 20 is configured of a switching circuit in which a plurality of switching elements are bridge-connected. As a switching element which comprises this switching circuit, elements, such as MOS-FET (Metal Oxide Semiconductor-Field Effect Transistor) and IGBT (Insulated Gate Bipolar Transistor), are mentioned, for example.

  The power supply unit 30 has a function of transmitting the AC power supplied from the inverter 20 to the power reception unit 50. The feed unit 30 is formed of a feed coil (not shown) in which a litz wire such as copper or aluminum is wound. The feeding coil may be a coil having a spiral structure in which a litz wire is wound flatly, or a coil having a solenoid structure in which a litz wire is spirally wound around a rod-like or plate-like magnetic body. . The number of turns of the feeding coil is appropriately set based on the distance from the power receiving unit 50, the desired power transmission efficiency, and the like. Note that the feeding unit 30 may be configured of only a feeding coil, and may include a capacitor (not shown) connected in series or in parallel to the feeding coil.

  The foreign matter removing unit 40 has a function of removing foreign matter from above the power feeding unit 30. The specific configurations of the power feeding unit 30 and the foreign matter removing unit 40 will be described later.

  The power reception unit 50 has a function of receiving the AC power transmitted from the power supply unit 30. The power receiving unit 50 is configured of a power receiving coil (not shown) in which a litz wire such as copper or aluminum is wound. The receiving coil may be a coil having a spiral structure in which a litz wire is wound in a flat shape, or may be a coil having a solenoid structure in which a litz wire is spirally wound around a rod-like or plate-like magnetic body. . The number of turns of the power receiving coil is appropriately set based on the distance from the power feeding unit 30, the desired power transmission efficiency, and the like. Note that the power receiving unit 50 may be configured of only a power receiving coil, and may include a capacitor (not shown) connected in series or in parallel to the power receiving coil. The power reception unit 50 configured as described above is mounted on a part of the mobile unit, and is mounted on the lower part of the mobile unit in the present embodiment.

  The rectifying unit 60 has a function of rectifying the AC power received by the power receiving unit 50 into DC power. As the rectifying unit 60, a conversion circuit provided with a full-wave rectifying function using a diode bridge and a power smoothing function using a capacitor and a three-terminal regulator can be mentioned. The DC power rectified by the rectifying unit 60 is output to the load B. Here, examples of the load B include a secondary battery and a rotating machine provided in the moving body. If the load B is an AC rotating machine, it is necessary to add an inverter (not shown) between the rectifying unit 60 of the non-contact power reception device A2 and the load B to supply AC power to the AC rotating machine. There is.

  By providing such a configuration, the contactless power transmission device A, in which electric power is transmitted contactlessly, is provided by the power supply unit 30 of the contactless power supply device A1 facing the power reception unit 50 of the contactless power reception device A2. To be realized.

  Next, with reference to FIG. 2, the configurations of the power feeding unit 30 and the foreign matter removing unit 40 of the non-contact power feeding device A1 in the non-contact power transmission device A according to the first embodiment of the present invention will be described in detail. FIG. 2a is a schematic top view showing the configuration of a foreign matter removing portion and a power feeding portion of the non-contact power transmission device in the non-contact power transmission device according to the first embodiment of the present invention. FIG. 2 b is a schematic side view showing the configuration of the foreign matter removing portion and the power feeding portion of the non-contact power feeding device in the non-contact power transmission device according to the first embodiment of the present invention.

  The feeding unit 30 is disposed in a feeding area where a moving body enters and a feeding operation is performed. For example, when the power receiving unit 50 is mounted substantially at the lower center of the moving body, the power feeding unit 30 is disposed substantially at the center of the power feeding area, and when the power receiving unit 50 is mounted at the lower front or rear lower portion of the movable body The feeding unit 30 is installed on the opposite side to the entry start side of the mobile object in the feeding area. The power supply unit 30 is packaged in a housing having an insulating property, and the external shape thereof includes various shapes such as a rectangular parallelepiped shape, a cubic shape, and a cylindrical shape. In addition, when the feed unit 30 is formed in a rectangular parallelepiped shape or a cubic shape, as shown in FIG. 2A, roundness may be given to each corner. When each corner has a roundness, the contact resistance between the power supply unit 30 and the sweep-out portion 42 described later can be reduced, so that the wear of the sweep-out portion 42 can be suppressed. Here, the power feeding area divides the area where the power feeding operation is performed on the movable body on which the non-contact power reception device A2 is mounted, and has a rectangular shape.

  As shown in FIGS. 2a and 2b, the foreign matter removing unit 40 has a receiving unit 41, a sweep-out unit 42, and a support 44.

  The receiving portion 41 is arranged to contact a part of the moving body when the moving body enters the feeding area. The receiving unit 41 is configured to move in response to the pressing force. For example, in the case where the moving body is a vehicle such as an electric car or a hybrid car, the receiving portion 41 is disposed to be in contact with the tire of the vehicle, and moves by the pressing force received from the tire. On the other hand, when the movable body is a transport device for a factory, the receiving portion 41 is disposed to be in contact with a part of the device main body of the transport device, and moves by the pressing force received from the part of the device main body. Specifically, the receiving portion 41 is formed of a rod-like member extending in a direction (a direction in which the long sides of the feed area oppose each other) orthogonal to the approach direction of the moving body to the feed area. More specifically, the receiving portion 41 is the side (lower side in the drawing) opposite to the entry start side of the moving body with respect to the feeding portion 30 in the feeding area, and viewed from the entering direction of the moving body, It is arranged outside the feed area (the left side in the figure) than the feed section 30. In the present embodiment, the receiving portion 41 is a fixed end in which one end on the side of the power feeding portion 30 is connected to a post portion 44 described later, and the other end is a free end. That is, the receiving portion 41 has a cantilever structure. Further, the installation height of the receiving portion 41 may be configured to coincide with the height of a part of the moving body that comes in contact with the receiving portion 41. In this case, the receiving portion 41 easily receives the pressing force of the moving body.

  The discharge unit 42 has a function of wiping the upper surface of the power supply unit 30. Specifically, the sweep-out portion 42 is, similarly to the receiving portion 41, formed of a member extending in a direction orthogonal to the approach direction of the moving body, that is, in the horizontal direction with the surface of the feeding area. More specifically, the sweep-out unit 42 is disposed on the side (lower side in the drawing) opposite to the entry start side of the mobile body with respect to the feed unit 30 in the feed area. In the present embodiment, the sweep-out unit 42 does not overlap with the receiving unit 41 when viewed from the moving-in direction, on the entry start side (upper side in the drawing) of the mobile unit with respect to the receiving unit 41 in the feed area. It arrange | positions and is connected to the support | pillar part 44 mentioned later via the rod-shaped sweep-out part support | pillar 421. As shown in FIG. That is, the sweep-out portion 42 extends in the direction opposite to the extending direction of the receiving portion 41 with reference to the post portion 44 described later. Further, the sweep-out portion 42 is disposed at a height at which the vertically downward tip contacts the upper surface of the feed portion 30, and the horizontal length is entirely on the entire upper surface of the feed portion 30 when wiping the upper surface of the feed portion 30. It has become the length to contact. Here, the shape or the like of the sweep-out unit 42 is not particularly limited as long as the sweep unit 42 can wipe the top of the power supply unit 30, but an example of a specific shape of the sweep-out unit 42 will be described with reference to FIG. FIG. 3a is a partially enlarged side view schematically showing an example of the configuration of the sweep-out portion of the non-contact power feeding device in the non-contact power transmission device according to the first embodiment of the present invention. FIG. 3 b is a partially enlarged side view schematically showing another example of the configuration of the sweep-out portion of the non-contact power feeding device in the non-contact power transmission device according to the first embodiment of the present invention. As shown in FIG. 3a, when the sweep-out portion 42 is formed of a broom-shaped member 42a, the contact portion between the sweep-out portion 42 and the feeding portion 30 is a brush-like attached bundle of fibers etc. It will exhibit a large brush-like or brush-like shape. In the present embodiment, the foreign matter can be removed by sweeping the foreign matter on the upper surface of the power supply unit 30. On the other hand, as shown in FIG. 3b, when the sweep-out portion 42 is composed of a wiper-shaped member 42b, the contact portion between the sweep-out portion 42 and the feed portion 30 has a wiper blade shape in which rubber is attached to the tip of the bar. Become. In the present embodiment, the foreign matter can be removed by wiping the foreign matter adhering to the surface of the upper surface of the power supply unit 30. At this time, it is possible to wipe off the dirt on the upper surface of the power supply unit 30 by the wiper-shaped sweep-out unit 42. The broom-shaped sweeping part 42 is suitable for removing solid foreign matter, and the wiper-like sweeping part 42 is suitable for removing liquid and soft solid foreign matter.

  The support 44 is a substantially cylindrical support extending vertically upward from the surface of the feeding area, and has a support 44 and a connecting portion 43. The column main body 44 is fitted with a bearing provided in the connecting portion 43, and is configured to be rotatable in the in-plane direction. The connecting portion 43 is connected and fixed to one end of the receiving portion 41, and supports the receiving portion 41 so as to be suspended, and is connected and fixed to the sweeping portion post 421, and the sweeping portion 42 is It supports to be suspended. That is, the support column 44 connects the receiving part 41 and the sweep-out part 42, and supports the receiving part 41 and the sweep-out part 42 rotatably in the in-plane direction. In other words, the receiving portion 41 and the sweep-out portion 42 are configured to be rotatable about the support 44. Thus, the sweep-out unit 42 moves on the feed unit 30 in conjunction with the movement of the receiving unit 41.

  Then, with reference to FIG. 4 and FIG. 5, the mechanical operation | movement of the foreign material removal part 40 of non-contact electric power supply apparatus A1 in non-contact electric power transmission apparatus A which concerns on 1st Embodiment of this invention is demonstrated. FIG. 4 is a schematic view showing the mechanical operation of the foreign matter removing unit at the start of mobile object entry in the non-contact power transmission device according to the first embodiment of the present invention. FIG. 5 is a schematic view showing the mechanical operation of the foreign matter removing unit during the approach of the moving body in the non-contact power transmission device according to the first embodiment of the present invention. In the present embodiment, an example in which the vehicle 70 enters the feed area 80 will be described. When the vehicle 70 has not entered the feeding area 80, the receiving portion 41 and the sweep-out portion 42 are arranged to extend in a direction orthogonal to the entering direction of the vehicle 70 (initial arrangement). In this state, even if the vehicle 70 starts to approach the feeding area 80, as shown in FIG. 4, the receiving portion 41 and the sweep-out portion 42 still maintain the initial arrangement. Subsequently, when the movement of the vehicle 70 into the feed area 80 proceeds and the tire of the vehicle 70 rotates and contacts the receiving portion 41, as shown in FIG. It rotates about the part 44. At this time, the sweep-out portion 42 fixed to the support portion 44 via the connection portion 43 also rotationally moves on the feed unit 30 on the support portion 44 in conjunction with the movement of the receiving portion 41. That is, the principle of leverage with the receiving portion 41 as the power point, the sweeping portion 42 as the action point, and the support portion 44 as the fulcrum works. Subsequently, when the entering operation of the vehicle 70 into the feed area 80 is completed, the sweep-out unit 42 wipes the entire upper surface of the feed unit 30 and foreign matter removal is completed.

  As described above, in the non-contact power transmission device A according to the present embodiment, the non-contact power feeding device A1 removes the foreign matter from the feeding portion 30 where the non-contact power feeding device A1 is disposed in the feeding area 80 The foreign matter removing unit 40 includes a receiving unit 41 that moves in response to a pressing force, a sweeping unit 42 that wipes the upper surface of the power feeding unit 30, a receiving unit 41 and a sweeping unit 42, and a receiving unit 41 and a support column 44 rotatably supporting the sweep-out unit 42 in the in-plane direction, and the sweep-out unit 42 moves on the feeding unit 30 in conjunction with the movement of the receiving unit 41. Therefore, foreign matter removal can be realized with a simple configuration using the principle of leverage with the support portion 44 as the fulcrum, the receiving portion 41 as the force point, and the sweep-out portion 42 as the action point. Further, since the receiving portion 41 is moved by the pressing force with the support portion 44 as a fulcrum, the sweeping portion 42 can be moved even if the entering angle of the moving body with respect to the receiving portion 41 varies somewhat. Therefore, foreign matter can be reliably removed even if the accuracy of the approach angle of the moving object is poor. As a result, it is possible to provide a non-contact power feeding device capable of reliably removing foreign matter while suppressing an increase in size of the device, even if the accuracy of the approach angle of the moving body to the power feeding area is poor.

Second Embodiment
Next, with reference to FIG. 6, the foreign substance removing unit 140 of the non-contact power feeding device in the non-contact power transmission device according to the second embodiment of the present invention will be described in detail. FIG. 6a is a schematic view showing the mechanical operation of the foreign matter removing unit before the mobile object approach start in the non-contact power transmission device according to the second embodiment of the present invention. FIG. 6b is a schematic view showing the mechanical operation of the foreign matter removing unit during mobile object entry in the non-contact power transmission device according to the second embodiment of the present invention.

  The non-contact power transmission device according to the second embodiment includes a non-contact power feeding device A1 and a non-contact power reception device A2. The configurations of the power supply 10, the inverter 20, and the power supply unit 30 of the noncontact power feeding device A1 and the configuration of the noncontact power reception device A2 are the same as those of the noncontact power transmission device A according to the first embodiment. The non-contact power feeding device A1 of the non-contact power transmission device according to the second embodiment is different from the first embodiment in that a foreign matter removing unit 140 is provided instead of the foreign matter removing unit 40. Hereinafter, differences from the first embodiment will be mainly described.

  As shown in FIGS. 6a and 6b, the foreign matter removing unit 140 has a receiving unit 41, a sweep-out unit 42, a support 44, and a spring 145. The configuration of the receiving portion 41, the sweep-out portion 42, and the support portion 44 is the same as that of the foreign matter removing portion 40 according to the first embodiment.

  The spring portion 145 is connected to the receiving portion 41 and the surface of the feeding area. Specifically, one end of the spring portion 145 is connected to the surface opposite to the surface receiving the pressing force of the receiving portion 41, and the other end is connected to the surface of the feeding area. The spring portion 145 is composed of an expandable spring. Thus, the spring portion 145 expands and contracts in conjunction with the movement of the receiving portion 41. In the present embodiment, the spring portion 145 is configured such that the spring compresses when the receiving portion 41 receives a pressing force and moves.

  Subsequently, the mechanical operation of the foreign object removing unit 140 in the non-contact power transmission device according to the second embodiment of the present invention will be described with reference to FIG. Also in the present description, an example will be described using an example in which the vehicle enters the feed area. When the vehicle has not entered the feeding area, as shown in FIG. 6a, the receiving portion 41 and the sweep-out portion 42 are arranged to extend in the direction orthogonal to the entering direction of the vehicle (initial arrangement). At this time, the spring portion 145 is in a state in which the compression force is released. In this state, even if the vehicle starts to enter the feeding area, the receiving portion 41 and the sweep-out portion 42 still maintain the initial arrangement. At this time, the spring portion 145 also maintains the initial state in which the compression force is released. Subsequently, when the movement of the vehicle into the power feeding area proceeds and the tire of the vehicle rotates and contacts the receiving portion 41, the receiving portion 41 receives the pressing force to support the support 44 as shown in FIG. 6b. Rotate to the center. At this time, the sweep-out portion 42 fixed to the support portion 44 via the connection portion 43 also rotationally moves on the feed unit 30 on the support portion 44 in conjunction with the movement of the receiving portion 41. Further, in conjunction with the movement of the receiving portion 41, a compressive force acts on the spring portion 145. Here, when the vehicle has entered the power feeding area, the receiving portion 41 remains at the position after rotational movement because the tire of the vehicle is in contact. Therefore, the spring portion 145 is also in a compressed state in the state where the vehicle is in the power feeding area. Subsequently, when the entry operation of the vehicle into the feed area is completed, the sweep-out unit 42 wipes the entire top surface of the feed unit 30, and foreign matter removal is completed. Subsequently, when the power feeding operation to the vehicle is completed and the vehicle exits from the power feeding area, the receiving portion 41 does not receive the pressing force of the vehicle. At this time, since the spring portion 145 is also released from the compression force, it is restored from the compressed state to the initial state. By the action (restoring force) of the spring portion 145, the receiving portion 41 automatically returns to the initial arrangement. Further, in conjunction with the movement of the receiving portion 41, the sweep-out portion 42 is also automatically returned to the initial arrangement.

  As described above, in the non-contact power transmission device according to the present embodiment, the expandable spring in which the foreign matter removing unit 140 of the non-contact power feeding device A1 is connected to the surface opposite to the surface receiving the pressing force of the receiving portion 41 A further part 145 is provided. Therefore, when the moving body enters the power feeding area, the spring portion 145 connected to the receiving portion 41 is compressed by the pressing force from the moving body. In addition, since the pressing force from the moving body disappears when the moving body exits from the power feeding area, the foreign matter removing portion 140 automatically returns to the initial state by the restoring force of the spring portion 145 connected to the receiving portion 41. When the mobile body enters the feeding area again to perform the feeding operation, it is possible to start the foreign matter removing operation in which the sweep-out unit 42 cleans the upper surface of the feeding unit 30. Further, since the foreign matter removing unit 140 automatically returns to the initial state by the restoring force of the spring portion 145, it is possible to reduce the number of driving devices such as an actuator for returning the foreign matter removing unit 140 to the initial state.

Third Embodiment
Next, referring to FIG. 7, the foreign matter removing unit 240 of the noncontact power feeding device in the noncontact power transmission device according to the third embodiment of the present invention will be described in detail. FIG. 7a is a schematic top view showing a part of the foreign matter removing portion of the noncontact power feeding device in the noncontact power transmission device according to the third embodiment of the present invention as viewed from the upper surface of the movable body. FIG. 7 b is a schematic side view showing a part of the non-contact power transmission device according to the third embodiment of the present invention as viewed from the direction orthogonal to the approach direction of the mobile object.

  The non-contact power transmission device according to the third embodiment includes a non-contact power feeding device A1 and a non-contact power receiving device A2. The non-contact power feeding device A1 of the non-contact power transmission device according to the third embodiment is different from the first embodiment in that a foreign matter removing unit 240 is provided instead of the foreign matter removing unit 40. The configurations of the power supply 10, the inverter 20, and the power feeding unit 30 of the non-contact power feeding device A1 and the configuration of the non-contact power reception device A2 are the same as those of the non-contact power transmission device A according to the first embodiment. However, the non-contact power reception device A2 according to the third embodiment is mounted on a moving body as in the first embodiment, but in this embodiment, the moving body on which the non-contact power reception device A2 is mounted is , The drive wheel which propels the said mobile body. Hereinafter, differences from the first embodiment will be mainly described.

  The foreign matter removing unit 240 includes a receiving unit 241, a sweep-out unit 42, a support unit 44, and a roller unit 246. The configuration of the sweep-out portion 42 and the support portion 44 is the same as that of the foreign matter removing portion 40 according to the first embodiment.

  The receiving portion 241 is provided with a recess for storing a roller portion 246 described later on the surface of the receiving portion 241 which receives the pressing force. The configuration of the receiving portion 241 is the same as that of the receiving portion 41 according to the first embodiment except that a recess is provided on the surface of the receiving portion 241 that receives the pressing force.

  The roller portion 246 is disposed on the surface of the receiving portion 241 which receives the pressing force. Specifically, the roller portion 246 is partially stored in a recess provided on the surface of the receiving portion 241 that receives the pressing force, and the remaining portion is disposed to protrude from the surface that receives the pressing force of the receiving portion 241. ing. In addition, the roller portion 246 is disposed at a position to be in contact with the drive wheel of the moving body when receiving a pressing force from the moving body. That is, the roller portion 246 comes into contact with the drive wheel of the moving body when the moving body enters the power feeding area. The roller portion 246 is configured to be rotatable, and when the drive wheel of the movable body abuts on the roller portion 246, the roller portion 246 rotates in the direction opposite to the rotation direction of the drive wheel of the movable body. With such a configuration, the rotational force of the drive wheel of the movable body is converted into the rotational force of the roller portion 246, and the receiving portion 241 provided with the roller portion 246 receives a pressing force in the advancing direction of the movable body. It becomes. Therefore, since the frictional force to the receiving part 241 other than the pressing force in the advancing direction of the moving body by the driving wheel of the moving body can be effectively removed, smooth rotation of the foreign matter removing part 240 is enabled.

  As described above, in the non-contact power transmission device according to the present embodiment, the movable body has a drive wheel for propelling the movable body, and the foreign matter removing unit 240 of the non-contact power feeding device A1 presses the receiving portion 241. The roller portion 246 is provided on the surface that receives pressure and rotates in the vertical direction with respect to the surface of the feeding area. Therefore, when the moving body enters the feeding area, the driving wheel of the moving body contacts the roller portion 246 of the receiving portion 241, so the rotational force vector of the driving wheel of the moving body is converted to the roller rotational force, and the moving body Since only the driving force along the direction of travel is applied to the receiving portion 241, the wear of the receiving portion 241 due to the frictional force between the moving body and the receiving portion 241 can be suppressed, and the durability of the receiving portion 241 can be improved.

  A: Noncontact power transmission device B: Load A1: noncontact power feeding device A2: noncontact power reception device 10: power source 20: inverter 30: power feeding portion 40, 140, 240 foreign matter removing portion 41 , 241: receiving part, 42: discharging part, 421: discharging part support, 42a: broom shaped member, 42b: wiper shaped member, 43: connecting part, 44: supporting part, 50: power receiving part, 60: rectifying part , 70: vehicle, 80: power feeding area, 145: spring portion, 246: roller portion.

Claims (2)

Non-contact power feeding device,
A non-contact power reception device mounted on a mobile body;
The non-contact power feeding device
A feeding unit disposed in the feeding area;
And a foreign matter removing unit for removing foreign matter from above the power feeding unit,
The movable body has a drive wheel for propelling the movable body,
The foreign matter removing unit is a receiving unit that moves in response to a pressing force;
A sweep-out unit for wiping the upper surface of the feed unit;
A supporting column which connects the receiving part and the sweeping part and which rotatably supports the receiving part and the sweeping part in the in-plane direction;
And a rotatable roller portion on the surface of the receiving portion that receives the pressing force ,
The sweep-out unit moves on the feeding unit in conjunction with the movement of the receiving unit .
The non-contact power transmission device , wherein the roller unit is disposed at a position to be in contact with the drive wheel when receiving a pressing force from the movable body . The non-contact power transmission device according to claim 1, wherein the foreign matter removing unit further comprises an expandable spring portion connected to a surface of the receiving portion opposite to the surface receiving the pressing force.

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