Title of Invention: Electric Vehicle
Technical field
[0001]
　The present disclosure relates to electric vehicles.
　This application claims priority based on Japanese Patent Application No. 2020-005600 filed on January 17, 2020, the content of which is incorporated herein.
Background technology
[0002]
　Railroad vehicles are required to reduce vehicle weight in order to achieve high efficiency, high speed, and maintenance-saving, as well as secure interior space and equipment loading space, and space-saving driving devices for lower floors. there is Up to now, miniaturization and weight reduction have been promoted by replacing induction motors with permanent magnet motors and replacing IGBT inverters with SiC inverters. For example, in U.S. Pat. No. 5,300,000, a motor for driving an axle is mounted by mounting its housing on the axle and connecting it to the chassis beam via an elastic control arm.
[0003]
　On the other hand, a magnetic flux modulation type (harmonic type) magnetic gear is known as a type of gear device. This magnetic gear is arranged with an inner peripheral magnetic field and an outer peripheral magnetic field arranged concentrically (coaxially) with a gap (air gap) provided between each of these two magnetic magnetic fields. , a magnetic pole piece device having a plurality of magnetic pole pieces (pole pieces) arranged alternately in the circumferential direction and a plurality of non-magnetic bodies (see Patent Documents 2 and 3). Then, the magnetic fluxes of the magnets of the two magnetic fields are modulated by the magnetic pole pieces to generate harmonic magnetic fluxes, and the two magnetic fields are synchronized with the harmonic magnetic fluxes. , the flux-modulated magnetic gear operates. For example, in a magnetic geared motor in which the magnetic flux modulation type magnetic gear and the motor are integrated, the magnetic field on the outer peripheral side is fixed and functions as a stator, and the magnetic field on the inner peripheral side is fixed to the high-speed rotor, The pole piece arrangement described above functions as a low speed rotor. By rotating the high-speed rotor by the magnetomotive force of the coil, the low-speed rotor rotates according to the reduction ratio.
prior art documents
patent literature
[0004]
Patent Document 1: US Patent No. 6868793
Patent Document 2: US Patent No. 9425655
Patent Document 3: Patent No. 5286373
SUMMARY OF THE INVENTION
Problems to be Solved by the Invention
[0005]
　For example, railroad vehicles run on rails, and if a large load acts on the rails, the rails are more likely to be damaged such as by wear. Generally, in a railroad vehicle, an axle body including an axle and wheels is connected to a bogie that supports the vehicle body via a spring or the like. In order to prevent damage to the rails, it is desirable for the weight of the axle body to be small. In this respect, for example, by directly driving the axle with a motor as in Patent Document 1, a speed reducer becomes unnecessary, but the weight of the motor tends to increase, which poses a problem in terms of reducing the weight of the electric vehicle. Therefore, the present inventors considered adopting a magnetic geared motor, which can be made smaller and lighter than a motor such as a permanent magnet motor, as a drive source for an electric vehicle such as a railroad vehicle.
[0006]
　However, if the motor is directly supported by the axle, for example, by installing the housing of the motor on the bearings as in Patent Document 1, the load (static load) of the motor when the electric vehicle is stationary naturally increases. All of the motor load (dynamic load) that accompanies the running of the vehicle acts on the axle. For this reason, all the dynamic loads acting on the axle directly act on the rail that supports the axle via the wheels (driving wheels), and the rail is easily damaged. In this respect, in an electric vehicle, the axle and the vehicle body are normally connected via a spring or the like, but the inventors of the present invention support the magnetic geared motor by suspending it from a vehicle structure such as a bogie of a railway vehicle. As a result, the inventors have found that the dynamic load of the magnetic geared motor acting on the rail (road surface) can be reduced.
[0007]
　In view of the circumstances described above, at least one embodiment of the present invention aims to provide an electric vehicle capable of reducing the dynamic load of the magnetic geared motor acting on the axle body.
Means to solve problems
[0008]
　An electric vehicle according to at least one embodiment of the present invention
　includes an axle body including an axle and driving wheels connected to both ends of the axle, and
　a stator, a low speed rotor and a high speed rotor for rotating the axle.
　a vehicle structure supported by the axle body; a motor support that couples the vehicle structure and the stator
　to support the magnetic geared motor on the vehicle structure;
　an elastic joint that couples the low-speed rotor and the axle so that the rotational force of the low-speed rotor can be transmitted to the axle.
Effect of the invention
[0009]
　According to at least one embodiment of the present invention, an electric vehicle is provided that can reduce the dynamic load of the magnetic geared motor acting on the axle.
Brief description of the drawing
[0010]
1 is a diagram schematically showing a drive device for an electric vehicle according to an embodiment of the present invention; FIG.
2 is a diagram for explaining how a magnetic geared motor is supported in an electric vehicle according to an embodiment of the present invention; FIG.
3 is a diagram for explaining how a magnetic geared motor is supported in a railway vehicle (electric vehicle) according to an embodiment of the present invention; FIG.
MODE FOR CARRYING OUT THE INVENTION
[0011]
　Several embodiments of the present invention will now be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, and are merely illustrative examples. do not have.
　For example, expressions denoting relative or absolute arrangements such as "in a direction", "along a direction", "parallel", "perpendicular", "center", "concentric" or "coaxial" are strictly not only represents such an arrangement, but also represents a state of relative displacement with a tolerance or an angle or distance to the extent that the same function can be obtained.
　For example, expressions such as "identical", "equal", and "homogeneous", which express that things are in the same state, not only express the state of being strictly equal, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
　For example, expressions that express shapes such as squares and cylinders do not only represent shapes such as squares and cylinders in a geometrically strict sense, but also include irregularities and chamfers to the extent that the same effect can be obtained. The shape including the part etc. shall also be represented.
　On the other hand, the expressions "comprising", "comprising", "having", "including", or "having" one component are not exclusive expressions excluding the presence of other components.
[0012]
　FIG. 1 is a diagram schematically showing a drive device for an electric vehicle 1 according to one embodiment of the invention. FIG. 2 is a schematic diagram of a cross section along the radial direction of the magnetic geared motor 3 according to one embodiment of the present invention. Moreover, FIG. 3 is a diagram for explaining the manner in which the magnetic geared motor 3 is supported in the electric vehicle 1 according to one embodiment of the present invention.
[0013]
　The electric vehicle 1 is a vehicle that can run by an electric motor (driving source), such as a railroad vehicle, a vehicle of a new transportation system, an electric vehicle, or the like. As shown in FIG. 1, an electric vehicle 1 includes an axle 21 extending in the vehicle width direction, an axle body 2 having drive wheels 22 connected to both ends of the axle 21, and an axle body 2 for rotating the axle 21. and an inverter connected to the magnetic geared motor 3. As the magnetic geared motor 3 is driven to rotate under the control of the inverter, the axle 21 is driven to rotate, whereby the electric vehicle 1 is configured to travel. The electric vehicle 1 may be configured to be capable of regenerative braking by a magnetic geared motor, and may be configured to be capable of charging the battery 94 with electric power generated by the regenerative braking.
[0014]
　More specifically, the magnetic geared motor 3 is integrated with a magnetic gear (flux modulation type magnetic gear) and includes a stator 31, a low speed rotor 32, and a high speed rotor 33. be. More specifically, as shown in FIG. 2, the magnetic gears are composed of an outer magnet field (stator 31) each having a cylindrical (annular shape; the same shall apply hereinafter) and an inner magnet field magnet (stator 31). (high speed rotor 33) and a pole shoe arrangement (low speed rotor 32). Then, when the magnetic pole piece device is arranged between the outer magnet field and the inner magnet field, they are on the same axis l (coaxial) and are fixed in the radial direction c (radial direction) to each other. It has a structure that is arranged with an interval of distance (air gap Ga) (see FIG. 3).
[0015]
　Further, as shown in FIG. 2, the outer diameter side magnet field and the inner diameter side magnet field are circumferentially spaced (equally spaced) in a cross section cut along the radial direction c of the magnetic geared motor 3. It has a magnetic pole pair (31m, 33m) such as a permanent magnet composed of a plurality of spaced north and south poles. Specifically, the outer magnet field (stator 31) has a plurality of magnetic pole pairs 31m and a stator core 31s that also supports the plurality of magnetic pole pairs 31m. On the cylindrical inner peripheral surface of the outer diameter side magnet field, a plurality of magnetic pole pairs 31m are arranged so that the magnetic poles face the radial direction c, and the N poles and S poles are alternately replaced along the circumferential direction. It is installed over the entire circumference in such a way. Similarly, the inner diameter magnet field (high-speed rotor 33) has a plurality of magnetic pole pairs 33m and a support member 33s that supports the plurality of magnetic pole pairs 33m. A plurality of magnetic pole pairs 33m are installed over the entire circumference along the circumferential direction a on the cylindrical outer peripheral surface of the inner diameter side magnetic field in the same manner as described above. Further, the magnetic pole piece device (low-speed rotor 32) has a plurality of magnetic pole pieces 32p (pole pieces) arranged at intervals (equal intervals) over the entire circumference in the circumferential direction a.
[0016]
　Then, as shown in FIG. 2, a plurality of coils (not shown) are installed on the outer diameter side magnet field so that the magnetic flux is directed in the radial direction c to form a stator 31 (stator). ) rotates the inner diameter magnet field (high-speed rotor 33). As a result, the magnetic pole piece device (low-speed rotor 32) rotates according to the reduction ratio determined by the ratio of the number of pole pairs of the magnetic pole pairs 33m of the inner magnet field to the number of magnetic pole pieces 32p of the magnetic pole piece device. .
[0017]
　In the embodiment shown in FIGS. 1-3, the electric vehicle 1 is a rail vehicle. The magnetic geared motor 3 and the inverter 91 are connected by a power line. The inverter 91 is connected to an overhead wire 93 (power transmission line) via a transformer 92 so as to be supplied with electric power. A battery 94 is connected to the inverter 91 . The electric power generated by the regenerative braking is supplied to the battery 94 so that the battery 94 can be charged. In railroad vehicles, the power generated by the regenerative braking is generally returned to the system side via the overhead wire 93 for other railroad vehicles, but depending on the status of the system, the battery 94 may be charged directly.
[0018]
　Next, the manner in which the magnetic geared motor 3 is supported in the railway vehicle (electric vehicle 1) having the above configuration will be described with reference to FIG.
　The electric vehicle 1 shown in FIG. 3 is a railway vehicle. Such a railway vehicle generally includes a bogie 4a (vehicle structure 4). The bogie 4a has a role of supporting the load of a vehicle body (not shown), and a vehicle body (not shown) forming a vehicle interior space is mounted on the upper portion thereof.
[0019]
　In addition, the bogie 4a is connected to the axle 21 by the connecting member 8, thereby absorbing the vibration of the railway vehicle caused by the track conditions such as the joint of the rail R and the running of the curve, thereby stabilizing the vehicle body (not shown). have a role. Specifically, in the embodiment shown in FIG. 3, each of the ends of the axle 21 and the carriage 4a are connected by connecting bodies 8, respectively. The connection body 8 includes bearings 81 that rotatably support both ends 21e of the axle 21, and elastic members 82 (in FIG. 3, coil spring). The elastic member 82 absorbs impact and vibration from the rail R side and stabilizes the vehicle body (not shown).
　Hereinafter, the electric vehicle 1 will be described by taking the railway vehicle as described above as an example.
[0020]
　As shown in FIG. 3, the electric vehicle 1 includes the axle body 2 and the magnetic geared motor 3 already described, the vehicle structure 4 (the truck 4a in FIG. 3) supported by the axle body 2, and the magnetic A motor support 5 that connects the geared motor 3 and the truck 4a and supports the magnetic geared motor 3 on the vehicle structure 4 (supported by hanging downward in FIG. 3), and a low speed rotor 32 that the magnetic geared motor 3 has. and an elastic joint 6 which is a member for transmitting the rotational force of to the axle 21 .
[0021]
　The vehicle structure 4 may be a bogie 4a in the case of a railway vehicle or a vehicle of a new transportation system. In the case of an electric vehicle, it may be, for example, a vehicle frame (chassis). Further, the vehicle structure 4 may be supported by the axle 21 via bearings 81 as shown in FIG. May be supported.
[0022]
　Also, the elastic joint 6 may be an elastic body in which all of them (61, 62, 63) are made of, for example, a rubber member. Alternatively, the elastic joint 6 may have an elastic body 63 in its part, and for example, the parts attached to the axle 21 and the low-speed rotor 32 may be connected via the elastic body 63 . That is, as shown in FIG. 3, the elastic joint 6 includes an axle attachment portion 61 attached to the axle 21, a motor attachment portion 62 attached to the magnetic geared motor 3 (low-speed rotor 32), and an axle attachment portion 61 and the motor attachment portion. and an elastic body 63 connecting with the portion 62 . The elastic body 63 may be a rubber member or a spring member such as a leaf spring.
[0023]
　In the embodiment shown in FIG. 3, the axle mounting portion 61 is fitted onto the axle 21, and the motor mounting portion 62 is mounted to the low speed rotor 32 of the magnetic geared motor 3 with bolts 61b. When the elastic body 63 is a spring member, one end of the spring member is connected to a flange (not shown) provided at the axial end of the low-speed rotor 32 and the other end of the spring member is joined to the axle 21. The axle mounting portion 61 may be fastened with a bolt (not shown) inserted through each bolt hole.
[0024]
　In the electric vehicle 1 , the low-speed rotor 32 of the magnetic geared motor 3 is connected to the axle 21 by the elastic joint 6 , so that the axle 21 rotates as the low-speed rotor 32 rotates. A part of the axle 21 extends inside the high-speed rotor 33 with a gap Gb from the inner peripheral surface of the high-speed rotor 33, so that the part of the axle 21 extends without contact when the vehicle is stopped. exist. In other words, the high-speed rotor 33 having a tubular shape is arranged such that the axle 21 passes through it, and the high-speed rotor 33 rotates idle without coming into contact with the axle 21 when the electric vehicle 1 is running. It is configured. By connecting the stator 31 to the motor support 5 in this state, most (all) of the load of the magnetic geared motor 3 is supported by the truck 4a.
[0025]
　That is, in the embodiment shown in FIG. 3, the magnetic geared motor 3 is supported below the carriage 4a, and is rigidly suspended from the carriage 4a by the motor support 5. As shown in FIG. As a result, the load of the magnetic geared motor 3 does not act directly on the axle 21, but acts indirectly through the carriage 4a. That is, the load of the magnetic geared motor 3 acts on the axle body 2 via the carriage 4a and the connecting body 8, and does not directly act on the axle 21 via the low speed rotor 32.
[0026]
　By configuring as described above, the load (hereinafter referred to as static load) when the electric vehicle 1 is stationary naturally acts on the axle body 2, but the load (hereinafter referred to as static load) of the magnetic geared motor 3 accompanying the traveling of the electric vehicle 1 , dynamic load) do not directly act on the axle body 2 , but indirectly act on the axle body 2 via the vehicle structure 4 and the connecting body 8 . As a result, the dynamic load of the magnetic geared motor 3 acting on the axle body 2 can be absorbed by the connecting body 8, and the dynamic load can be made smaller than when the axle body 2 directly supports the magnetic geared motor 3. can be done. Therefore, for example, when the electric vehicle 1 is a railroad vehicle, it is possible to suppress wear and damage of the rail R on which the drive wheels 22 (wheels) are installed, and it is possible to extend the life of the rail R. .
[0027]
　Further, if the axle 21 and the low-speed rotor 32 were rigidly connected instead of the elastic joint 6, the following inconvenience would occur. Specifically, when the axle 21 and the low-speed rotor 32 are rigidly coupled, the low-speed rotor 32 is rigidly supported on the stator 31 side by a bearing (outer diameter side bearing 7b described later) or the like as shown in FIG. In this case, the effect of the elastic member 82 of the connection body 8 described above cannot be obtained, and the static load and dynamic load of the magnetic geared motor 3 are applied to the axle 21 . At this time, if the rigidity of the connecting portion between the low-speed rotor 32 and the axle 21 is low, the low-speed rotor 32 may be tilted within the magnetic geared motor 3 due to the presence of the elastic member 82 of the connection body 8 described above. . Therefore, by connecting the axle 21 and the low-speed rotor 32 with the elastic joint 6, it is possible to suppress the above two movements.
[0028]
　In the embodiment shown in FIG. 3, the electric vehicle 1 further includes an inner diameter side bearing 7a and an outer diameter side bearing 7b, each of which is a rolling bearing. The inner diameter side bearing 7a includes a first outer ring fixed to the low speed rotor 32, a first inner ring fixed to the high speed rotor 33, and a first outer ring rotatably held between the first outer ring and the first inner ring. and rolling elements. Further, the outer diameter side bearing 7b includes a second outer ring fixed to the stator 31 (frame portion), a second inner ring fixed to the low-speed rotor 32, and rotatable between the second outer ring and the second inner ring. and a second rolling element held in the
[0029]
　That is, the stator 31 and the low speed rotor 32 are supported by the stator 31 by connecting the stator 31 and the low speed rotor 32 by the outer diameter side bearing 7b so as to allow relative rotation. Moreover, the high-speed rotor 33 is supported by the low-speed rotor 32 by connecting the low-speed rotor 32 with the inner diameter side bearing 7a so as to be relatively rotatable. This allows the magnetic geared motor 3 to be properly supported by the vehicle structure 4 .
[0030]
　According to the above configuration, in the electric vehicle 1, the magnetic geared motor 3 is supported by the vehicle structure 4 (such as a bogie of a railway vehicle or a vehicle frame of an electric vehicle) by being suspended, for example. Also, the low-speed rotor 32 (output shaft) and the axle body 2 are connected via the elastic joint 6 . By using the magnetic geared motor 3 as the driving source of the electric vehicle 1 and supporting the magnetic geared motor 3 by the vehicle structure 4 in this way, the dynamic load of the magnetic geared motor 3 acting when the electric vehicle 1 is running can be reduced. It is possible to reduce the size and weight of the electric vehicle 1 while reducing it.
[0031]
　Further, the low-speed rotor 32 of the magnetic geared motor 3 and the axle 21 of the axle body 2 are connected via the elastic joint 6 , so that the low-speed rotor 32 rotates the axle 21 . As a result, even if the axle 21 is tilted with respect to the magnetic geared motor 3 due to, for example, driving conditions, such tilt can be absorbed by the elastic joint 6 while properly transmitting power. In addition, the magnetic geared motor 3 can be protected by preventing the low-speed rotor 32 from tilting with respect to the surrounding high-speed rotor 33 and stator 31 .
[0032]
　The present invention is not limited to the above-described embodiments, and includes modifications of the above-described embodiments and modes in which these modes are combined as appropriate.
　In the above-described embodiment, the magnetic geared motor 3 is suspended from the vehicle structure 4, but the present invention is not limited to this embodiment. may be supported by the method of
(Appendix)
[0033]
(1) An electric vehicle (1) according to at least one embodiment of the present invention is an
　axle body ( 2), a magnetic geared motor (3) 　comprising
　a stator (31), a low speed rotor (32) and a high speed rotor (33) for rotating the axle (21);
), a
　motor that connects the vehicle structure (4) and the stator (31), and supports the magnetic geared motor (3) on the vehicle structure (4) a support (5) and
　an elastic joint (6) connecting the low speed rotor (32) and the axle (21) so that the rotational force of the low speed rotor (32) can be transmitted to the axle (21); , provided.
[0034]
　According to the configuration of (1) above, in the electric vehicle (1) such as a railway vehicle, a vehicle of a new transportation system, an electric vehicle, etc., the magnetic geared motor (3) is connected to the vehicle structure (4) (bogie of the railway vehicle (4a), a vehicle frame of an electric vehicle, etc.) is supported by the vehicle structure (4), such as by being suspended, and the low-speed rotor (32) (output shaft) and the axle body (2) are They are connected via elastic joints (6). In this manner, the magnetic geared motor (3) is used as the drive source of the electric vehicle (1), and the magnetic geared motor (3) is supported by the vehicle structure (4). It is possible to reduce the size and weight of the electric vehicle (1) while reducing the dynamic load of the magnetic geared motor (3) acting on the axle (2).
[0035]
　The low-speed rotor (32) of the magnetic geared motor (3) and the axle (21) of the axle body (2) are connected via the elastic joint (6), so that the low-speed rotor (32) can rotate the axle (21). ) is rotated. As a result, even if the axle (21) tilts with respect to the magnetic geared motor (3) due to driving conditions, such tilting can be absorbed by the elastic joint (6) while properly transmitting power. can be done. In the magnetic geared motor (3), a cylindrical low-speed rotor (32) is sandwiched between a stator (31) on the outer peripheral side and a high-speed rotor (33) on the inner peripheral side while providing an air gap (Ga). Although it has such a coaxial structure, it protects the magnetic geared motor (3) by suppressing the tilting of the low speed rotor (32) with respect to the surrounding high speed rotor (33) and stator (31). You can also
[0036]
(2) In some embodiments, in the configuration of (1) above,
　connecting bodies (8) for connecting each of the end portions (21e) of the axle (21) and the vehicle structure (4). and the
　connection body (8) includes
　a bearing (81) that rotatably supports the both ends (21e) of the axle (21), the bearing
　(81) and the vehicle structure (4) and a resilient member (82) disposed between.
[0037]
　According to the configuration (2) above, the load of the magnetic geared motor (3) acts on the axle body (2) via the vehicle structure body (4) and the connection body (8). Thereby, the dynamic load of the magnetic geared motor (3) acting on the axle body (2) can be absorbed by the connection body (8), and when the axle body (2) directly supports the magnetic geared motor (3). The dynamic load can be made smaller than Therefore, for example, when the electric vehicle (1) is a railroad vehicle, it is possible to suppress wear and damage of the rail (R) on which the drive wheels (22) (wheels) are installed, and extend the life of the rail (R). Extension can be planned.
[0038]
(3) In some embodiments, the low-
　speed rotor (32), the high-speed rotor (33), and the stator (31) have cylindrical shapes in the configurations (1) and (2) above,
　The low-speed rotor (32) is arranged between the high-speed rotor (33) and the stator (31) arranged on the outer peripheral side of the
　high-speed rotor (33). Inside, part of the axle (21) extends without contact with the inner peripheral surface of the high-speed rotor (33).
[0039]
　According to the above configuration (3), the axle (21) is disposed in a state of penetrating the interior of the high-speed rotor (33) having a cylindrical shape, and a part of the axle (21) is positioned inside the high-speed rotor (33). ) with a gap (Gb) between them. As a result, the load of the magnetic geared motor (3) does not act directly on the axle body (2), but can be more properly supported so as to act via the vehicle structure (4), and the electric vehicle ( It is possible to reduce the dynamic load of the magnetic geared motor (3) acting on the axle body (2) during 1) running.
[0040]
(4) In some embodiments, in the configurations (1) to (3) above,
　a first outer ring fixed to the low-speed rotor (32) and a first inner ring fixed to the high-speed rotor (33) and a first rolling element rotatably held between the first outer ring and the first inner ring; and a
　second outer ring fixed to the stator (31). , a second inner ring fixed to the low speed rotor (32), and a second rolling element rotatably held between the second outer ring and the second inner ring. And further comprising.
[0041]
　According to the configuration (4) above, the high-speed rotor (33) and the low-speed rotor (32) are connected to the stator (31) via two bearings (81). This allows the magnetic geared motor (3) to be properly supported by the vehicle structure (4).
[0042]
(5) In some embodiments, in the configurations of (1) to (4) above, the
　elastic joint (6) includes an
　axle attachment portion (61) attached to the axle (21) and the low-
　speed rotor ( 32), and
　an elastic body (63) connecting the axle mounting portion (61) and the motor mounting portion (62).
　According to the above configuration (5), the elastic joint (6) appropriately transmits the rotation of the low-speed rotor (32) to the axle (21), and properly couples the axle (21) and the low-speed rotor (32). can be concatenated.
[0043]
(6) In some embodiments, in the configuration of (5) above, the
　elastic body (63) is a rubber member.
　According to the configuration (6) above, the inclination of the axle (21) with respect to the magnetic geared motor (3) can be absorbed appropriately by the rubber member.
[0044]
(7) In some embodiments, in the configuration of (5) above, the
　elastic body (63) is a spring member.
　According to the configuration (7) above, the inclination of the axle (21) with respect to the magnetic geared motor (3) can be absorbed appropriately by the spring member such as the leaf spring.
[0045]
(8) In some embodiments, in the configurations of (1) to (7) above, the
　electric vehicle (1) is a railroad vehicle, and the
　vehicle structure (4) is a bogie of the railroad vehicle. (4a), the
　magnetic geared motor (3) is suspended by the motor support (5).
　According to the configuration (8) above, the electric vehicle (1) is a railway vehicle having a magnetic geared motor (3) as a drive source, and the magnetic geared motor (3) is suspended from a bogie (4a) of the railway vehicle. Supported. This provides the same effects as (1) to (7) above.
Code explanation
[0046]
1 Electric Vehicle
2 Axle
21 Axle
21e End
22 Driving Wheel
3 Magnetic Geared Motor
31 Stator
31m Magnetic Pole Pair (Stator)
31s Stator Iron Core (Stator)
32 Low Speed ​​Rotor
32p Magnetic Pole Piece
33 High Speed ​​Rotor
33m Magnetic Pole Pair (High Speed ​​Rotor)
33s Support member (high-speed rotor)
4 Vehicle structure
4a Truck
5 Motor support
6 Elastic joint
61 Axle mounting portion
61b Bolt
62 Motor mounting portion
63 Elastic body
7a Inner diameter side bearing
7b Outer diameter side bearing
8 Connector
81 Bearing
82 Elastic member
91 inverter
92 Transformer
93 Catenary
94 Battery
Ga Air gap
Gb Gap (between axle and high-speed rotor)
a Circumferential direction
c Radial direction
l Axis line
R Rail
The scope of the claims
[Claim 1]
　an axle body including an axle and driving wheels connected to both ends of the axle; a magnetic geared motor configured to rotate the 　axle , the motor including
　a stator, a low speed rotor and a high speed rotor ;
a vehicle structure to be
　supported; a motor support that connects the vehicle structure and the stator and supports the magnetic geared motor on the vehicle structure; and a torque
　transferable from the low speed rotor to the axle. and an elastic joint connecting the low-speed rotor and the axle so as to.
[Claim 2]
　A connection body for connecting each of the both end portions of the axle and the vehicle structure, the connection
　body including
　a bearing that rotatably supports the both end portions of the axle, and the
　bearing and the vehicle . The electric vehicle according to claim 1, further comprising an elastic member arranged between the structure and the elastic member.
[Claim 3]
　The low-speed rotor, the high-speed rotor, and the stator each have a cylindrical shape, and the low-
　speed rotor is arranged between the high-speed rotor and the stator arranged on the outer peripheral side of the high-speed rotor,
　3. The electric vehicle according to claim 1, wherein a part of the axle extends inside the high-speed rotor without contacting the inner peripheral surface of the high-speed rotor.
[Claim 4]
　a first outer ring fixed to the low-speed rotor; a first inner ring fixed to the high-speed rotor; and a first rolling element rotatably held between the first outer ring and the first inner ring. a
　second outer ring fixed to the stator; a second inner ring fixed to the low-speed rotor; and a second inner ring rotatably held between the second outer ring and the second inner ring. The electric vehicle according to any one of claims 1 to 3, further comprising an outer diameter side bearing including rolling elements.
[Claim 5]
　The elastic joint has an
　axle attachment portion attached to the axle
　, a motor attachment portion attached to the low-speed rotor, and
　an elastic body connecting the axle attachment portion and the motor attachment portion. The electric vehicle according to any one of .
[Claim 6]
　The electric vehicle according to claim 5, wherein the elastic body is a rubber member.
[Claim 7]
　The electric vehicle according to claim 5, wherein the elastic body is a spring member.
[Claim 8]
　The electric vehicle is a railway vehicle, the
　vehicle structure is a bogie of the railway vehicle, and the
　magnetic geared motor is suspended and supported by the motor support. The electric vehicle described in the item.