Magnetic levitation wheel and car

Abstract

The invention discloses a magnetic suspension wheel, comprising: an outer tire, an inner wheel hub, a traction system and a suspension system, wherein the outer tire comprises a tire bead and an annular steel groove, wherein the tire bead surrounds the outer ring of the annular steel groove; the inner wheel hub is arranged in the annular steel groove and an air gap is left between the inner wheel hub and the annular steel groove; the traction system comprises a mover and a stator winding, wherein a circle of grooves is arranged in the middle position of the inner wall of the annular steel groove, the mover is fixed in the groove, the stator windings are evenly distributed around the outer ring of the inner wheel hub, and the mover is used for inducing an alternating magnetic field to drive the outer tire to rotate; the suspension system comprises a suspension coil, a gap sensor and a suspension controller, wherein the suspension coil is arranged inside the inner wheel hub, the gap sensors are evenly distributed on the outer ring of the inner wheel hub, and the suspension controller is electrically connected to the gap sensor and the suspension coil respectively. Also disclosed is a magnetic suspension car with the tire, which has good power, low noise, good stability and is easy to repair and maintain.

Description

Technical Field

[0001] The invention relates to the field of transportation vehicles, and in particular to a magnetic suspension wheel and a car. Background Art

[0002] The existing automobile tires are rigidly connected to the body, and the tires are only rotated by the power transmitted by the automobile engine, and the power output performance is average. In addition, the vibration and noise caused by the friction between the tires and the ground during driving are directly transmitted to the car through the transmission shaft, resulting in loud noise, strong bumps and poor stability. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a magnetic suspension wheel and a car, which can achieve low noise in the car, greatly reduce the bumpy feeling of passengers, and have good stability and power output performance.

[0004] According to an embodiment of the present invention, the magnetic suspension wheel comprises: an outer tire, the outer tire comprises a tire bead and an annular steel groove, the tire bead surrounds the outer ring of the annular steel groove; an inner hub, the inner hub is arranged in the annular steel groove and an air gap is left between the inner hub and the annular steel groove; a traction system, the traction system comprises a mover and a stator winding, a circle of grooves is provided at the middle position of the inner wall of the annular steel groove, the mover is fixed in the groove, the stator winding is evenly distributed around the outer ring of the inner hub, the stator winding is used to generate an alternating magnetic field through a three-phase current, and the mover is used to induce the alternating magnetic field to drive the outer tire to rotate; a suspension system, the suspension system comprises a suspension coil, a gap sensor and a suspension controller, the suspension coil is arranged inside the inner hub to provide a suspension force between the inner hub and the annular steel groove, the gap sensors are evenly distributed on the outer ring of the inner hub to detect the suspension gap between the inner hub and the annular steel groove, the suspension controller is electrically connected to the gap sensor and the suspension coil respectively, and the suspension controller is used to control the current input into the suspension system through the suspension gap information to ensure the stability of the gap between the inner hub and the outer tire.

[0005] The magnetic levitation wheel according to the embodiment of the present invention has at least the following technical effects:

[0006] The embodiment of the present invention integrates a traction system and a suspension system in the tire. The DC magnetic circuit generated by the suspension coil in the suspension system forms a DC closed magnetic circuit in the annular steel groove. The annular steel groove interacts with the magnetic field of the wheel hub electromagnet to generate a suspension force. The suspension controller obtains the gap between the outer tire and the inner wheel hub through the signal fed back by the gap sensor, and ensures that the gap between the wheel hub and the outer tire is kept within a certain range by controlling the current input to the suspension coil. The alternating magnetic field generated by the stator winding in the traction system is induced in the mover to drive the outer tire to rotate, which has the following advantages:

[0007] 1. A separate traction system is set in each tire. The alternating magnetic field generated by the stator winding drives the rotor embedded in the outer tire to rotate. This is equivalent to configuring a traction motor in each tire. Installing four tires on a vehicle is equivalent to being driven by four traction motors at the same time, with good power output performance.

[0008] 2. There is no connection between the tire and the wheel hub. During driving, the tire noise between the tire and the ground cannot be transmitted into the car through rigid connections such as the drive shaft, so the noise is small.

[0009] 3. A separate suspension system is configured inside the inner wheel hub to ensure a stable suspension gap between the outer tire and the inner wheel hub, with good stability.

[0010] 4. The tires are driven purely electrically, without linkage bearings, drive bearings, differential devices and other equipment, which greatly improves the vehicle's driving efficiency.

[0011] 5. There is no connection between the tire and the wheel hub, and the tire is easy to disassemble, making it easy to repair and maintain.

[0012] According to some embodiments of the present invention, the suspension system also includes a guide coil electrically connected to the suspension controller, and the guide coil is arranged at the front and rear ends of the middle horizontal line inside the inner hub to provide front and rear suspension forces to offset the inertial force during acceleration and deceleration.

[0013] According to some embodiments of the present invention, the suspension coil is located in the upper half of the inner hub.

[0014] According to some embodiments of the present invention, the side edges of the inner hub are provided with vertical transverse stops extending to both sides of the outer tire, so as to limit the outer tire laterally.

[0015] According to some embodiments of the present invention, the mover is an aluminum induction plate.

[0016] According to some embodiments of the present invention, the distance between the mover and the inner hub is less than or equal to the distance between the inner hubs in the annular steel groove.

[0017] According to some embodiments of the present invention, a first magnetic isolation layer is provided between the mover and the inner wall of the annular steel groove to avoid magnetic circuit interference.

[0018] According to some embodiments of the present invention, a second magnetic isolation layer is provided between the stator winding and the inner hub to avoid magnetic circuit interference.

[0019] The magnetic levitation vehicle according to the embodiment of the present invention comprises a vehicle body and wheels mounted on the vehicle body, wherein the wheels are any of the magnetic levitation wheels described above.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 A side structural schematic diagram of a magnetic levitation wheel in an embodiment of the present invention;

[0023] Figure 2 A front cross-sectional view of the magnetic suspension wheel in a straight line running in an embodiment of the present invention;

[0024] Figure 3 Another front cross-sectional view of the magnetic suspension wheel in a straight line running according to an embodiment of the present invention;

[0025] Figure 4 It is a front cross-sectional view of the magnetic suspension wheel when turning in the embodiment of the present invention;

[0026] Figure 5 A schematic diagram of force analysis of a magnetic suspension wheel when turning in an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of the structure of the top surface of the magnetic levitation wheel in an embodiment of the present invention.

[0028] Reference Numbers

[0029] The outer tire 100 , the tire bead 110 , the annular steel groove 120 , the inner wheel hub 200 , the transverse stopper 210 , the mover 310 , the stator winding 320 , the suspension coil 410 , and the gap sensor 420 . DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0032] In the description of the invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of the first or the second, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] refer to Figure 1 A magnetic levitation wheel includes: an outer tire 100, an inner wheel hub 200, a traction system and a suspension system.

[0035] The outer tire 100 includes a tire bead 110 and an annular steel groove 120. The tire bead 110 is fixedly mounted on the outer ring of the annular steel groove 120. The tire bead 110 can be made of the current rubber tire bead of automobile tires. It mainly plays the role of protecting the annular steel groove, reducing shock, and generating friction with the ground, which is the same as the tire bead of a conventional automobile.

[0036] refer to Figure 2-Figure 3 The inner hub 200 is disposed in the annular steel groove 120 and an air gap is left between the inner hub 200 and the annular steel groove 120 . The inner hub 200 maintains a stable suspension gap with the annular steel groove 120 through a suspension system.

[0037] The traction system includes a mover 310 and a stator winding 320. Figure 6 A groove is formed in the middle of the inner wall of the annular steel groove 120, and the mover 310 is fixed in the groove. The stator winding 320 is evenly distributed around the outer ring of the inner hub 200. The stator winding 320 is used to generate an alternating magnetic field through a three-phase current, and the mover 310 is used to induce the alternating magnetic field to drive the outer tire 100 to rotate. Preferably, the mover 310 is an aluminum induction plate, which generates an induced current in the alternating magnetic field. The energized aluminum induction plate is driven by the Ampere force to drive the outer tire 100 to rotate. Figure 1 The positions marked N and S in the inner wheel hub are stator windings 320, which can be regarded as a set of three-phase windings of the traction motor, and the aluminum induction plate in the outer tire 100 is the rotor. Overall, the traction system in the tire in this application can be regarded as an AC asynchronous motor with an outer rotor, and the power supply control and traction control of the stator winding can use conventional control solutions on the market, which are simple and convenient and easy to apply in engineering.

[0038] In the present application, the mover may also use a copper induction plate. Both copper and aluminum materials will not be magnetized by the DC magnetic field generated by the suspension coil 410, but both have good conductivity and can induce the alternating magnetic field to generate current and rotate under the action of the Ampere force. However, the aluminum induction plate is lighter in weight, so the aluminum induction plate used in this embodiment is more suitable for practical applications.

[0039] refer to Figure 1 The suspension system includes a suspension coil 410, a gap sensor 420 and a suspension controller. The suspension coil 410 is arranged in the upper half of the inner wheel hub 200 to provide a suspension force between the inner wheel hub 200 and the annular steel groove 120. The gap sensor 420 is evenly distributed on the outer ring of the inner wheel hub 200 to detect the suspension gap between the inner wheel hub 200 and the annular steel groove 120. The suspension controller is electrically connected to the gap sensor 420 and the suspension coil 410 respectively. The suspension controller uses the suspension gap fed back by the gap sensor 420 and controls the current input to the suspension coil 410 to change the suction force between the upper inner wheel hub 200 and the annular steel groove 120 to ensure that the suspension gap is within a stable range. The magnetic circuit distribution of the suspension coil 410 on the inner wheel hub 200 and the annular steel groove 120 on the outer tire 100 is shown in the figure. Figure 2-Figure 3 As shown, the current passes through the suspension coil 410 to generate a DC magnetic field, and the DC magnetic field passes through the annular steel groove 120 to form a closed magnetic circuit.

[0040] Since the vehicle has acceleration and deceleration processes, in order to ensure that the inner wheel hub 200 always remains in the center of the tire during this process, the suspension system also includes a guide coil 430 electrically connected to the suspension controller. The guide coil 430 is set at the front and rear ends of the middle horizontal line inside the inner wheel hub 200. The suspension controller changes the suction force of the inner wheel hub 100 to the front and rear by controlling the current size inside the guide coil 430, so that the inner wheel hub 200 can be better stabilized in the center of the tire.

[0041] refer to Figure 2-Figure 3 In order to reduce the magnetic circuit interference between the suspension system and the traction system, the distance between the aluminum induction plate and the inner wheel hub 200 is less than or equal to the distance between the annular steel groove 120 and the inner wheel hub 200, so that the induction area of ​​the alternating magnetic field-aluminum induction plate is located within the induction area of ​​the DC magnetic field-annular steel groove.

[0042] In order to further reduce magnetic circuit interference, a first magnetic isolation layer is provided between the aluminum induction plate and the inner wall of the annular steel groove 120, and a second magnetic isolation layer is provided between the stator winding 320 and the outer wall of the inner hub 200. The magnetic isolation layer can be made of conventional magnetic isolation materials such as plastic.

[0043] When the vehicle is using the magnetic suspension wheel, it will turn left or right. It is necessary to ensure that the tire always follows the wheel hub. Therefore, the magnetic pole of the annular steel groove 120 needs to be aligned with the electromagnet pole plate of the inner wheel hub. Figure 4 When the vehicle turns, due to the offset angle between the tire and the wheel hub, the magnetic circuit between the contour and the annular steel groove will tilt with the tire offset. Figure 5 Since the magnetic chain between the inner wheel hub and the annular steel groove 120 is inclined, the suction force between the outer tire and the inner wheel hub is an inclined force F. Through force analysis, the suction force F can be decomposed into a horizontal suction force F1 and a vertical suction force F2, wherein the vertical suction force F2 generates the suspension force required for the vehicle in the vertical direction, and the horizontal suction force F1 generates a guiding force in the horizontal direction to pull the outer tire 100 back to the center line of the wheel hub.

[0044] In order to prevent the outer tire 100 from exceeding the induction range of the DC magnetic field when the left and right deviations are too large, refer to Figure 4 The side of the inner wheel hub 200 is provided with a vertical transverse stopper 210 extending to both sides of the outer tire 100, so as to limit the outer tire 100 laterally and prevent the outer tire 100 from detaching from the inner wheel hub 200 when the outer tire 100 deviates too much to the left or right. The material of the transverse stopper 210 needs to be softer than the annular steel groove 120.

[0045] The embodiment of the present invention also includes a magnetic levitation vehicle, including a vehicle body and tires mounted on the vehicle body, wherein the tires are magnetic levitation wheels in this embodiment.

[0046] In summary, the embodiment of the present invention integrates a traction system and a suspension system in the tire. The DC magnetic circuit generated by the suspension coil 410 in the suspension system forms a DC closed magnetic circuit in the annular steel groove 120. The annular steel groove 120 interacts with the magnetic field of the wheel hub electromagnet to generate a suspension force. The suspension controller obtains the gap between the outer tire 100 and the inner wheel hub 200 through the signal fed back by the gap sensor 420, and ensures that the gap between the inner wheel hub 200 and the outer tire 100 is kept within a certain range by controlling the current input to the suspension coil 410. The alternating magnetic field generated by the stator winding 320 in the traction system is induced in the mover 310 to drive the outer tire to rotate, which has the following advantages:

[0047] 1. A separate traction system is set in each tire. The alternating magnetic field generated by the stator winding drives the rotor embedded in the outer tire to rotate. This is equivalent to configuring a traction motor in each tire. Installing four tires on a vehicle is equivalent to being driven by four traction motors at the same time, with good power output performance.

[0048] 2. There is no connection between the tire and the wheel hub. During driving, the tire noise between the tire and the ground cannot be transmitted into the car through rigid connections such as the drive shaft, so the noise is small.

[0049] 3. A separate suspension system is configured inside the inner wheel hub to ensure a stable suspension gap between the outer tire and the inner wheel hub, with good stability.

[0050] 4. The tires are driven purely electrically, without linkage bearings, drive bearings, differential devices and other equipment, which greatly improves the vehicle's driving efficiency.

[0051] 5. There is no connection between the tire and the wheel hub, and the tire is easy to disassemble, making it easy to repair and maintain.

[0052] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A magnetic levitation wheel, characterized in that: include: An outer tire (100), the outer tire (100) comprising a tire bead (110) and an annular steel groove (120), the tire bead (110) being fixed to the outer ring of the annular steel groove (120); an inner wheel hub (200), wherein the inner wheel hub (200) is disposed in the annular steel groove (120) and an air gap is left between the inner wheel hub (200) and the annular steel groove (120); A traction system, the traction system comprising a mover (310) and a stator winding (320), a groove being provided in the middle of the inner wall of the annular steel groove (120), the mover (310) being fixed in the groove, the stator winding (320) being evenly distributed around the outer ring of the inner wheel hub (200), the stator winding (320) being used to generate an alternating magnetic field through a three-phase current, and the mover (310) being used to induce the alternating magnetic field to drive the outer tire (100) to rotate; A suspension system, the suspension system comprising a suspension coil (410), a gap sensor (420) and a suspension controller, the suspension coil (410) being arranged inside the inner hub (200) to provide a suspension force between the inner hub (200) and the annular steel groove (120), the gap sensor (420) being evenly distributed on the outer ring of the inner hub (200) to detect the suspension gap between the inner hub (200) and the annular steel groove (120); the suspension controller being electrically connected to the gap sensor (420) and the suspension coil (410) respectively to control the current input into the suspension coil (410) through suspension gap information to ensure the stability of the gap between the inner hub (200) and the annular steel groove (120); The suspension system also includes a guide coil (430) electrically connected to the suspension controller, wherein the guide coil (430) is arranged at the front and rear ends of the middle horizontal line inside the inner hub (200) to provide front and rear suspension forces to offset the inertial force during acceleration and deceleration; The side edge of the inner wheel hub (200) is provided with a vertical transverse stopper (210) extending to both sides of the outer tire (100) so as to limit the position of the outer tire (100) in the transverse direction; A first magnetic isolation layer is provided between the mover (310) and the inner wall of the annular steel groove (120) to avoid magnetic circuit interference; A second magnetic isolation layer is provided between the stator winding (320) and the outer wall of the inner hub (200) to avoid magnetic circuit interference.

2. The magnetic levitation wheel according to claim 1, characterized in that: The suspension coil (410) is located in the upper half of the inner hub (200).

3. The magnetic levitation wheel according to claim 1, characterized in that: The mover (310) is an aluminum induction plate.

4. The magnetic levitation wheel according to claim 1, characterized in that: The distance between the mover (310) and the inner hub (200) is less than or equal to the distance between the annular steel groove (120) and the inner hub (200).

5. A magnetic levitation vehicle, characterized in that: The invention comprises a vehicle body and a wheel mounted on the vehicle body, wherein the wheel is the magnetic levitation wheel according to any one of claims 1 to 4.

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