CYCLE EQUIPMENT

Abstract

Wheel assembly, which includes the following: - a tire (2) with a ring-shaped form; - a wheel main body (3, 7) having a rotatable area (3b, 7); - an intermediate element (4) which is an element separate from each of the tire (2) and the wheel main body (3, 7); - a first coupling structure unit (5) comprising a first elastic plate (51) configured to couple the tire (2) and the intermediate element (4); - a second coupling structure unit (6) comprising a second elastic plate (61) configured to couple the rotatable area (3b) and the intermediate element (4), - wherein the rotatable area (3b, 7) and the intermediate element (4) are arranged coaxially to the tire (2), - wherein, if a straight line that is orthogonal to an axis of the tire (2) is defined as a first imaginary straight line, the first elastic plate (51) is arranged orthogonally to the first imaginary straight line, - wherein, if a straight line which is orthogonal to the axis of the tire (2) and which differs from the first imaginary straight line is defined as a second imaginary straight line, the second elastic plate (61) is arranged orthogonally to the second imaginary straight line, - wherein the intermediate element (4) can move in the thickness direction of the first elastic plate (51) with respect to the tire (2) by means of an elastic deformation of the first elastic plate (51) and - wherein the wheel main body (3, 7) can move in the thickness direction of the second elastic plate (61) in relation to the intermediate element (4) by means of an elastic deformation of the second elastic plate (61).

Description

[0001] This invention relates to a wheel device comprising a tire with a ring-shaped form.

[0002] A wheel device is known to date that includes a drive unit housed within a ring-shaped tire, for lowering the floor of a rail vehicle body. In such a prior art wheel device, a force is typically transmitted from the rail via the tire to the drive unit when the rail vehicle is in motion.

[0003] In particular, when the wheel assembly crosses, for example, a connection point between two successive rails, or when abnormal wear occurs on an outer peripheral surface of the tire, the impact force to which the drive device housed within the tire is subjected increases. Thus, the drive device in a wheel assembly according to the prior art may be prone to malfunction.

[0004] Previously, a wheel device was proposed in which the periphery of a drive unit housed within a tire is covered with an elastic body to reduce the impact force transmitted from the tire to the drive unit. In such a prior art wheel device, a synthetic resin, an air spring, or a viscoelastic gel is used as the elastic body, configured to cover the periphery of the drive unit (see, for example, JP 2003-220944A).

[0005] DE 42 30 137 A1 describes a single wheel with a wheel hub motor for rail vehicles, wherein the wheel hub motor drives the single wheel either directly or via a gearbox, and the drive unit, consisting of the motor and gearbox or the motor alone, is integrated into the single wheel. The objective was to find a suspension for the wheel tread on the drive unit that is compact and insensitive to the operating temperatures of the drive unit during operation and to the heat radiation emitted by the drive unit. The document achieves this by mounting the wheel tread of the single wheel directly on the outer surface of the drive unit in a rotationally fixed manner, with an elastic intermediate layer and a thermally insulating intermediate layer interposed.

[0006] GB 486 634 A describes a load-bearing wheel, particularly for use on railway vehicles, comprising straight or slightly curved springs arranged end-to-end between the rim and the outer tire. The springs are mounted in opposing channels of the tire and rim so that they are deformable only radially. In one modification, the inner circumference of the tire has a central rib to provide a pair of spaced-apart receptacles for the springs. The springs are provided with projections that press against the rib and the rim walls, allowing them to deform both radially and axially.

[0007] In the wheel assembly described in JP 2003-220944A, which is a prior art design, it is necessary to specify a low stiffness of the elastic body in a radial direction of the tire in order to reduce the impact force transmitted from the tire to the drive device. However, if the stiffness of the elastic body is specified low in the radial direction of the tire, the stiffness of the elastic body in a rotational direction of the tire is also reduced. Therefore, in a prior art wheel assembly, it is less likely that the torque of the drive device will be transmitted to the tire.

[0008] This invention was designed to solve the problem described above, and it has the objective of providing a wheel device by which a reduction of an impact force transmitted from a tire to a wheel main body is made possible, and by which a reliable transmission of torque from the wheel main body to the tire is made possible.

[0009] The problem underlying the invention is solved by a wheel device with the features of independent claim 1. Advantageous embodiments of the invention are specified in dependent claims 2 to 12.

[0010] The wheel device according to the invention enables a reduction of the impact force transmitted from the tire to the wheel body, as well as a reliable transmission of the torque from the wheel body to the tire.

[0011] The figures show: Fig. 1 a front view of a wheel device according to a first embodiment of this invention; Fig. 2 a sectional view along a line II-II according to Fig. 1; Fig. 3 a sectional view along a line III-III according to Fig. 1; Fig. 4 a perspective view of a first elastic plate according to Fig. 1; Fig. 5 a perspective view to illustrate a state in which the first elastic plate according to Fig. 1 is attached to a tire; Fig. 6 a perspective view of a second elastic plate according to Fig. 1; Fig. 7 a perspective view to illustrate a state in which the second elastic plate according to Fig. 1 is attached to an intermediate element; Fig. 8 A schematic view of a model of a wheel device, which is created by modeling the wheel device according to Fig. 1 is obtained; Fig. 9 a front view to illustrate a state in which the wheel assembly is in accordance Fig. 1 moved on a rail; Fig. 10 A schematic view of a model of a wheel device, which is created by modeling the wheel device according to Fig. 9 will be received; Fig. 11 a front view to illustrate a state of the wheel assembly when the tire is in a rotational position that differs from a rotational position of the tire according to Fig. 9 differs, and it is subject to an impact force from the rail; Fig. 12 a schematic view of a model of a wheel device, which is created by modeling the wheel device according to Fig. 11 will be received; Fig. 13 a sectional view of a modification example of the wheel device according to the first embodiment of this invention; Fig. 14 a perspective view of a wheel device according to a second embodiment of this invention; Fig. 15 a perspective view to show a state after removal of an electric motor from the wheel assembly according to Fig. 14; Fig. 16 a front view of the wheel assembly according to Fig. 14; Fig. 17 a sectional view along a line XVII-XVII according to Fig. 16; Fig. 18 a sectional view along a line XVIII-XVIII according to Fig. 16; Fig. 19 a perspective view of a first elastic plate according to Fig. 15; Fig. 20 a perspective view of a second elastic plate according to Fig. 15; Fig. 21 a sectional view of a modification example of the wheel device according to the second embodiment of this invention; Fig. 22 a perspective view of a wheel device according to a third embodiment of this invention; Fig. 23 a perspective view to show a state after removal of an electric motor from the wheel assembly according to Fig. 22; Fig. 24 a front view of the wheel assembly according to Fig. 22; Fig. 25 a sectional view along a line XXV-XXV according to Fig. 24; Fig. 26 a sectional view along a line XXVI-XXVI according to Fig. 24; Fig. 27 a perspective view of a first elastic plate according to Fig. 23; Fig. 28 a sectional view of a modification example of the wheel device according to the third embodiment of this invention; Fig. 29 a front view of a wheel device according to a fourth embodiment of this invention; Fig. 30 a perspective exploded view of a first elastic plate of a wheel device according to a fifth embodiment of this invention.

[0012] The following describes embodiments of the invention with reference to the drawings.

[0013] Fig. Figure 1 is a front view of a wheel device according to a first embodiment of this invention. Fig. 2 is a sectional view along a line II-II according to Fig. 1. Fig. 3 is a sectional view along a line IIII-III according to Fig. 1. In the drawings, a wheel assembly 1 comprises the following: a tire 2, an electric motor 3, an intermediate element 4, a first coupling structure unit 5, and a second coupling structure unit 6. In this example, wheel assembly 1 is a wheel assembly of a rail vehicle, which is to be arranged on the body of a rail vehicle.

[0014] The tire 2 has a ring-shaped form with axis P at its center. Furthermore, an inner peripheral surface 21 of the tire 2 is a cylindrical surface with axis P at its center. The tire 2 is made of a metal, such as iron. The wheel assembly 1 is positioned on a rail in such a way that an outer peripheral surface of the tire 2 is in contact with the rail. The wheel assembly 1, which is mounted on the rail, moves along the rail in accordance with the rotation of the tire 2.

[0015] The electric motor 3 is arranged within the tire 2 as a wheel main body. If the direction along the axis P of the tire 2 is defined as the axial direction of the tire 2, then the dimension of the electric motor 3 in the axial direction of the tire 2 is, in this example, larger than the dimension of the tire 2 in the axial direction, as shown in Fig. 2 and Fig. 3 shown.

[0016] Furthermore, the electric motor 3 comprises a stator 3a, a rotor 3b with an annular shape, and a bearing element (not shown). The stator 3a serves as the armature. The rotor 3b surrounds an outer periphery of the stator 3a. The bearing element is configured to support both the stator 3a and the rotor 3b. The bearing element of the electric motor 3 is mounted on the vehicle body of the rail vehicle.

[0017] The stator 3a is attached to the bearing element as a mounting area of ​​the electric motor 3. The rotor 3b is rotatably mounted on the bearing element as a rotating part of the electric motor 3. The axes of the stator 3a and the rotor 3b coincide with the axis of the electric motor 3. The electric motor 3 is arranged coaxially with the tire 2.

[0018] The outer peripheral surface 31 of the rotor 3b is a cylindrical surface with the axis of the electric motor 3 at its center. The outer diameter of the rotor 3b is smaller than the inner diameter of the tire 2. When electrical power is supplied to the stator 3a, the rotor 3b rotates around the axis of the electric motor 3 relative to the stator 3a. As a result, the electric motor 3 generates a torque that rotates the tire 2.

[0019] The intermediate element 4 is a ring-shaped element located inside the tire 2. The electric motor 3 is located inside this intermediate element 4. Thus, in this example, the wheel assembly 1 corresponds to a motor inside the wheel, with the electric motor 3 located inside the tire 2.

[0020] The intermediate element 4 is a separate element from the tire 2 and the electric motor 3. As in Fig. 2 and Fig. As shown in Figure 3, the intermediate element 4 in this example is located in the same position as the position of the tire 2 in the axial direction of the tire 2.

[0021] The axis of the intermediate element 4 coincides with the axis P of the tire 2. In particular, the intermediate element 4 is arranged coaxially with the tire 2. Each of the inner peripheral surfaces 41 and 42 of the intermediate element is a cylindrical surface with the axis of the intermediate element 4 as its center.

[0022] The outer diameter of the intermediate element 4 is smaller than the inner diameter of the tire 2. Furthermore, the inner diameter of the intermediate element 4 is larger than the outer diameter of the rotor 3b. Thus, the intermediate element 4, which has a ring-shaped form, is arranged in a space between the tire 2 and the electric motor 3.

[0023] The first coupling structure unit 5 is arranged between the tire 2 and the intervening element 4. Furthermore, the first coupling structure unit 5 has a pair of first elastic plates 51 configured to couple the tire 2 and the intervening element 4.

[0024] The second coupling structure unit 6 is arranged between the intermediate element 4 and the rotor 3b. Furthermore, the second coupling structure unit 6 has a pair of second elastic plates 61 configured to couple the intermediate element 4 and the rotor 3b together.

[0025] Below, each of the configurations of the pair of first elastic plates 51 and the pair of second elastic plates 61 is described based on an orthogonal XYZ coordinate system having a Y-axis that coincides with the axis P of the tire 2 and an angle θ in a circumferential direction of the tire 2 with respect to a reference position A specified on the Z-axis of the orthogonal XYZ coordinate system.

[0026] A straight line extending along the direction of the X-axis, which is orthogonal to the axis P of tire 2, is defined as a first imaginary straight line. Then, each plate of the pair of first elastic plates 51 is positioned such that it intersects the first imaginary straight line. Furthermore, the pair of first elastic plates 51 is positioned on sides opposite each other with respect to the axis P of tire 2 in a direction along the first imaginary straight line, that is, in the direction of the X-axis.

[0027] In particular, one plate of the pair of first elastic plates 51 is arranged at a position leading the reference position A by θ = 90° in the circumferential direction of the tire 2, and the other plate of the first elastic plates 51 is arranged at a position leading the reference position A by θ = 270° in the circumferential direction of the tire 2. Thus, the axis P of the tire 2 is located between the plates of the pair of first elastic plates 51.

[0028] Fig. Figure 4 is a perspective view of the first elastic plate 51 according to Fig. 1. Each of the first elastic plates 51 is a flat plate with a rectangular shape. The direction along the short sides of the rectangular shape of the first elastic plate 51 is defined as the width direction of the first elastic plate 51. Furthermore, the direction along the long sides of the rectangular shape of the first elastic plate 51 is defined as the length direction of the first elastic plate 51. And furthermore, the direction orthogonal to both the width direction and the length direction of the first elastic plate 51 is defined as the thickness direction of the first elastic plate 51.

[0029] As in Fig. As shown in Figure 1, each of the first elastic plates 51 is arranged orthogonally to the first imaginary straight line. In particular, the thickness direction of each of the first elastic plates 51 coincides with the direction along the first imaginary straight line, that is, with the direction of the X-axis. Furthermore, the width direction of each of the first elastic plates 51 coincides with the axial direction of the tire 2, that is, with the direction of the Y-axis.

[0030] As a result of the arrangement described above, the longitudinal direction of each of the first elastic plates 51 coincides with the direction of the Z-axis, which is orthogonal to both the direction of the X-axis and the direction of the Y-axis. In particular, the pair of first elastic plates 51 is arranged parallel to the YZ-plane, which is orthogonal to the direction of the X-axis.

[0031] Both longitudinal end regions 511 of each of the first elastic plates 51 are attached as a pair of fastening end regions to the inner peripheral surface 21 of the tire 2. A longitudinally intermediate region 512 of each of the first elastic plates 51 is attached as a single fastening plate region to the outer peripheral surface 42 of the intermediate element 4.

[0032] The stiffness of the first elastic plate 51 in a direction orthogonal to the thickness direction, that is, the stiffness in the plane of the first elastic plate 51, is sufficiently higher than the stiffness of the first elastic plate 51 in the thickness direction, that is, than the stiffness out of the plane of the first elastic plate 51.

[0033] As a result, a state in which the tire 2 and the intermediate element 4 are coupled together by inserting the first elastic plates 51 can be considered equivalent to a state in which the tire 2 and the intermediate element 4 are rigidly connected together in the direction orthogonal to the thickness direction of the first elastic plates 51.

[0034] The stiffness out of the plane of the first elastic plate 51 is, however, sufficiently lower than the stiffness in the plane of the first elastic plate 51. Thus, the first elastic plate 51 is elastically deformable in the thickness direction of the first elastic plate 51. If each of the first elastic plates 51 is elastically deformed in the thickness direction of the first elastic plate 51, the intermediate element 4 can move in the direction along the first imaginary straight line, that is, in the direction of the X-axis, with respect to the tire 2.

[0035] In particular, the tire 2 and the intermediate element 4 have such a degree of freedom that movement relative to each other is only possible in the direction of the X-axis due to the elastic deformation of each of the first elastic plates 51 in the thickness direction.

[0036] The outer peripheral surface 42 of the intermediate element 4 has outer peripheral planar surface areas 421. These outer peripheral planar surface areas 421 are formed at positions where the longitudinally interposed areas 512 of the first elastic plates 51 are each attached as a single mounting plate area. In this example, the outer peripheral surface 42 of the intermediate element 4 has two outer peripheral planar surface areas 421.

[0037] The outer peripheral planar surface areas 421 are formed in the outer peripheral surface 42 of the intervening element 4 at a position leading θ = 90° with respect to the reference position A in the circumferential direction of the tire 2, or at a position leading θ = 270° with respect to the reference position A in the circumferential direction of the tire 2. Each of the outer peripheral planar surface areas 421 is a planar surface area orthogonal to the direction along the first imaginary straight line, that is, to the direction of the X-axis.

[0038] The longitudinally interposed area 512 of each of the first elastic plates 51 is in a state in which a surface of the longitudinally interposed area 512, which is orthogonal to the thickness direction of the first elastic plate 51, is held in contact with the outer peripheral planar surface area 421 without leaving a gap, attached to the outer peripheral surface 42 of the interposed element 4.

[0039] A fastening method is used as a method for fastening or attaching the longitudinally intermediate areas 512 of the first elastic plates 51 to the outer peripheral surface 42 of the intermediate element 4, in which, for example, screws, bolts, welding or an adhesive is used.

[0040] The inner peripheral surface 21 of the tire 2 has pairs of step regions 211. Each pair of step regions 211 is formed at positions where both end regions 511 are attached longitudinally to each of the first elastic plates 51 as a pair of fastening end regions. Thus, the inner peripheral surface 21 of the tire 2 has a number of pairs of step regions 211 corresponding to the number of first elastic plates 51. In this example, two pairs of step regions 211 are formed on the inner peripheral surface 21 of the tire 2.

[0041] Fig. Figure 5 is a perspective view to illustrate a state in which the first elastic plate 51 is according to Fig. 1 is attached to the tire 2. Both end regions 511 in the longitudinal direction of the first elastic plate 51 are each fitted into the pair of step regions 211. The step regions of the pair of step regions 211 are opposite each other in the circumferential direction of the tire 2.

[0042] Each step area of ​​the pair of step areas 211 has a lower surface 211a and an end surface 211b. The lower surface 211 of the step area is orthogonal to the direction along the first imaginary straight line, that is, the direction of the X-axis. The end surface 211b of the step area extends from the lower surface 211a of the step area to the inside of the tire 2.

[0043] The end surface 211b of each step region of the pair of step regions 211 is a planar surface orthogonal to the direction of the Z-axis. The pair of step regions 211 is formed on the inner peripheral surface 21 of the tire 2 in a state where the end surfaces 211b of two step regions are opposite each other in the direction of the Z-axis.

[0044] Both end regions 511 in the longitudinal direction of the first elastic plate 51 are each in a state in which surfaces of the same, which are orthogonal to the thickness direction of the first elastic plate 51, are held in contact with the lower surfaces 211a of the step regions without leaving a gap, and in which end surfaces of the same in the longitudinal direction of the first elastic plate 51 are held in contact with the end surfaces 211b of the step regions without leaving a gap, attached to the inner peripheral surface 21 of the tire 2.

[0045] A fastening method is used to attach both of the end regions 511 in the longitudinal direction of the first elastic plate 51 to the inner peripheral surface 21 of the tire 2, in which, for example, screws, bolts, welding or an adhesive is used.

[0046] A second imaginary straight line is defined as a straight line that differs from the first straight line and is orthogonal to the axis P of tire 2. Then, each plate of the pair of second elastic plates 61 is positioned such that it intersects the second imaginary straight line. In this example, a straight line extending along the direction of the Z-axis is defined as the second imaginary straight line. Specifically, the straight line that is orthogonal to the first imaginary straight line is defined as the second imaginary straight line in this example.

[0047] Furthermore, the pair of second elastic plates 61 is arranged at positions on the sides opposite each other with respect to the axis P of the tire 2, in one direction along the second imaginary straight line, that is, in the direction of the Z-axis. Thus, one plate of the pair of second elastic plates 61 is arranged at the reference position A with θ = 0°, and the other plate of the pair of second elastic plates 61 is arranged at a position leading θ = 180° with respect to the reference position A in the circumferential direction of the tire 2. Thus, the axis P of the tire 2 is located between the plates of the pair of second elastic plates 61.

[0048] Fig. Figure 6 is a perspective view of the second elastic plate 61 according to Fig. 1. Each of the second elastic plates 61 is a flat plate with a rectangular shape. The direction along the short sides of the rectangular shape of the second elastic plate 61 is defined as the width direction of the second elastic plate 61. Furthermore, the direction along the long sides of the rectangular shape of the second elastic plate 61 is defined as the length direction of the second elastic plate 61. And furthermore, the direction orthogonal to both the width direction and the length direction of the second elastic plate 61 is defined as the thickness direction of the second elastic plate 61.

[0049] As in Fig. As shown in Figure 1, each of the second elastic plates 61 is arranged orthogonally to the second imaginary straight line. In particular, the thickness direction of each of the second elastic plates 61 coincides with the direction along the second imaginary straight line, that is, the direction of the Z-axis. Furthermore, the width direction of each of the second elastic plates 61 coincides with the axial direction of the tire 2, that is, with the direction of the Y-axis.

[0050] As a result of the arrangement described above, the longitudinal direction of each of the second elastic plates 61 coincides with the direction of the X-axis, which is orthogonal to both the direction of the Y-axis and the direction of the Z-axis. In particular, the pair of second elastic plates 61 is arranged parallel to the XY-plane, which is orthogonal to the direction of the Z-axis.

[0051] Both longitudinal end regions 611 of each of the second elastic plates 61 are attached as a pair of fastening end regions to the inner peripheral surface 41 of the intermediate element 4. A longitudinally intermediate region 612 of each of the second elastic plates 61 is attached as a single fastening plate region to the outer peripheral surface 31 of the rotor 3b.

[0052] The stiffness of the second elastic plate 61 in a direction orthogonal to the thickness direction, that is, the stiffness in the plane of the second elastic plate 61, is sufficiently higher than the stiffness of the second elastic plate 61 in the thickness direction, that is, the stiffness out of the plane of the second elastic plate 61. As a result, a state in which the intermediate element 4 and the rotor 3b are coupled to each other by the insertion of the second elastic plates 61 can be considered equivalent to a state in which the intermediate element 4 and the rotor 3b are rigidly connected to each other in the direction orthogonal to the thickness direction of the second elastic plates 61.

[0053] The out-of-plane stiffness of the second elastic plate 61 is, however, sufficiently lower than the in-plane stiffness of the second elastic plate 61. Thus, the second elastic plate 61 is elastically deformable in the thickness direction. If each of the second elastic plates 61 is elastically deformed in the thickness direction, the electric motor 3 can move in the direction along the second imaginary straight line, that is, in the direction of the Z-axis, with respect to the intervening element 4.

[0054] In particular, the intermediate element 4 and the electric motor 3 have such a degree of freedom that movement relative to each other is only possible in the direction of the Z-axis due to the elastic deformation of each of the second elastic plates 61 in the thickness direction.

[0055] The outer peripheral surface 31 of the rotor 3b has outer peripheral planar surface areas 311. The outer peripheral planar surface areas 311 are formed at positions where the longitudinally intervening areas 612 of the second elastic plates 61 are each attached as a single mounting plate area. In this example, the outer peripheral surface 31 of the rotor 3b has two outer peripheral planar surface areas 311.

[0056] The outer peripheral planar surface areas 311 are formed in the outer peripheral surface 31 of the rotor 3b at the reference position A with θ = 0° or at a position leading θ = 180° with respect to the reference position A in the circumferential direction of the tire 2. Each of the outer peripheral planar surface areas 311 is a planar surface area that is orthogonal to the direction along the second imaginary straight line, that is, to the direction of the Z-axis.

[0057] The longitudinally interposed region 612 of each of the second elastic plates 61 is in a state in which a surface of the longitudinally interposed region 612, which is orthogonal to the thickness direction of the second elastic plate 61, is held in contact with the outer peripheral planar surface region 311 without leaving a gap, attached to the outer peripheral surface 31 of the rotor 3b.

[0058] A fastening method is used as a method for attaching the longitudinally intermediate areas 612 of the second elastic plates 61 to the outer peripheral surface 31 of the rotor 3b, in which, for example, screws, bolts, welding or an adhesive is used.

[0059] The inner peripheral surface 41 of the intermediate element 4 has pairs of step regions 411. Each pair of step regions 411 is formed at positions where both end regions 511 are attached longitudinally to each of the second elastic plates 61 as a pair of fastening end regions. Thus, the inner peripheral surface 41 of the intermediate element 4 has a number of pairs of step regions 411 corresponding to the number of second elastic plates. In this example, two pairs of step regions 411 are formed on the inner peripheral surface 41 of the intermediate element 4.

[0060] Fig. Figure 7 is a perspective view to illustrate a state in which the second elastic plate 61 is according to Fig. 1 is attached to the intermediate element 4. Both end regions 611 in the longitudinal direction of the second elastic plate 61 are each fitted into the pair of step regions 411. The step regions of the pair of step regions 411 are opposite each other in the circumferential direction of the intermediate element 4.

[0061] Each step area of ​​the pair of step areas 411 has a lower surface 411a and an end surface 411b. The lower surface 411a is orthogonal to the direction along the second imaginary straight line, that is, to the direction of the Z-axis. The end surface 411b extends from the lower surface 411a to an inner side of the intervening element 4.

[0062] The end surface 411b of the step region of each step region of the pair of step regions 411 is a planar surface that is orthogonal to the direction of the X-axis. The pair of step regions 411 is formed on the inner peripheral surface 41 of the intervening element 4 in a state in which the end surfaces 411b of two step regions are opposite each other in the direction of the X-axis.

[0063] Both end regions 611 in the longitudinal direction of the second elastic plate 61 are each in a state in which the surfaces of the same, which are orthogonal to the thickness direction of the second elastic plate 61, are held in contact with the lower surfaces 411a of the step regions without leaving a gap, and in which the end surfaces of the same in the longitudinal direction of the second elastic plate 61 are held in contact with the end surfaces 411b of the step regions without leaving a gap, attached to the inner peripheral surface 41 of the intermediate element 4.

[0064] A fastening method is used to fasten the two end regions 611 in the longitudinal direction of the second elastic plate 61 to the inner peripheral surface 41 of the intermediate element 4, in which, for example, screws, bolts, welding or an adhesive is used.

[0065] Next, the operation of wheel facility 1 will be described. Fig. Figure 8 is a schematic view of a model of a wheel assembly, which is created by modeling the wheel assembly 1 according to Fig. 1 is obtained. The electric motor 3 can move in the direction of the Z-axis due to the elastic deformation of the pair of second elastic plates 61 with respect to the intervening element 4. The movement of the electric motor 3 with respect to the intervening element 4 in directions other than the direction of the Z-axis is restricted by the stiffness in the plane of the pair of second elastic plates 61.

[0066] The intermediate element 4 can move in the direction of the X-axis due to the elastic deformation of the pair of first elastic plates 51 relative to the tire 2. The movement of the intermediate element 4 in directions other than the direction of the X-axis relative to the tire 2 is restricted by the in-plane stiffness of the pair of first elastic plates 51.

[0067] As a result, the wheel assembly 1 has a translational oscillation system with two degrees of freedom, in which the electric motor 3 can move freely in the XZ plane with respect to the tire 2.

[0068] Each of the stiffnesses of the first elastic plates 51 and the second elastic plates 61 is a stiffness in the plane in the circumferential direction of the tire 2. Thus, elastic deformation of each of the first elastic plates 51 and the second elastic plates 61 in the circumferential direction of the tire 2 is restricted.

[0069] Any state in which the intermediate element 4 is coupled to the tire 2 and a state in which the electric motor 3 is coupled to the intermediate element 4 in the circumferential direction of the tire 2 can be considered a rigid connection state.

[0070] Fig. Figure 9 is a front view to illustrate a state in which the wheel assembly 1 is located according to Fig. 1 moved on a rail. Fig. Figure 10 is a schematic view of a model of a wheel device, which is created by modeling the wheel device 1 according to Fig. 9 is obtained. The outer peripheral surface of the tire 2 is in a state in which the wheel assembly 1 is arranged on a rail 10, in contact with the rail 10. When the tire 2 rotates, the wheel assembly 1 moves on the rail 10.

[0071] When the rotor 3b of the electric motor 3 is rotated by supplying power to the stator 3a, a torque of the electric motor 3 is transmitted from the rotor 3b via the pair of second elastic plates 61 to the intermediate element 4. The direction of the torque transmitted from the rotor 3b to each of the second elastic plates 61 coincides with the direction of the in-plane stiffness of each of the second elastic plates 61. As a result, the elastic deformation of the second elastic plates 61 is limited, and consequently, the torque of the rotor 3b is effectively transmitted to the intermediate element 4.

[0072] The torque transmitted to the intermediate element 4 is then transferred to the tire 2 via the pair of first elastic plates 51. The direction of the torque transmitted from the intermediate element 4 to each of the first elastic plates 51 coincides with the direction of the in-plane stiffness of each of the first elastic plates 51.

[0073] As a result, the elastic deformation of the first elastic plates 51 is restricted, and consequently, the torque transmitted to the intermediate element 4 is effectively transferred to the tire 2. In this way, the tire 2 is rotated.

[0074] Rail 10 has a plurality of unit rails 10a connected in series. A difference in level sometimes occurs at a connection point between two adjacent unit rails 10a. When the wheel assembly 1 crosses the connection point between two unit rails 10a, the tire 2 is subjected to an impact force from the rail 10.

[0075] If tire 2 is subjected to an impact force in the direction along the second imaginary straight line, that is, in the direction that coincides with the direction of the Z-axis, as in Fig. 9 and Fig. As shown in Figure 10, the electric motor 3 moves only in the direction along the second imaginary straight line due to the elastic deformation of the second elastic plates 61 relative to the intervening element 4. As a result, the impact force to which the tire 2 is subjected is absorbed by the pair of second elastic plates 61, so that it is transmitted to the electric motor 3 with less force.

[0076] Furthermore, Fig. 11 a front view to illustrate a state of the wheel assembly 1 in which the tire 2 is in a rotational position which differs from that of the tire 2 according to Fig. 9 differs, and it is subject to an impact force from the rail 10. Fig. Figure 12 is a schematic view of a model of the wheel assembly, which is created by modeling the wheel assembly 1 according to Fig. 11 will be received.

[0077] If the tire 2 is subjected to an impact force from the rail 10 in a direction that does not coincide with either the direction along the first imaginary straight line or the direction along the second imaginary straight line, as in Fig. 11 and Fig. As shown in Figure 12, the intermediate element 4 moves through the elastic deformation of the first elastic plates 51 with respect to the tire 2 in the direction along the first imaginary straight line, and the electric motor 3 moves through the elastic deformation of the second elastic plates 61 with respect to the intermediate element 4 in the direction along the second imaginary straight line.

[0078] As a result, the impact force to which the tire 2 is subjected is absorbed by the first elastic plates 51 and the second elastic plates 61, so that it is transmitted less strongly to the electric motor 3.

[0079] In the wheel assembly 1 described above, the first elastic plates 51 are arranged orthogonally to the first imaginary straight line, which is orthogonal to the axis P of the tire 2. Furthermore, the second elastic plates 61 are arranged orthogonally to the second imaginary straight line, which differs from the first imaginary straight line. This arrangement enables an increase in the stiffness of each of the first elastic plates 51 and the second elastic plates 61 in the circumferential direction of the tire 2.

[0080] As a result, the elastic deformation of each of the first elastic plates 51 and the second elastic plates 61 in one direction of rotation of the tire 2 can be limited, and consequently, the occurrence of unnecessary vibrations of the tire 2 relative to the electric motor 3 in the direction of rotation of the tire 2 can be prevented. Thus, the torque can be transmitted more reliably from the electric motor 3 to the tire 2.

[0081] Furthermore, if the tire 2 is subjected to an external impact force, the electric motor 3 can move relative to the tire 2, causing at least one of the first elastic plates 51 and the second elastic plate 61 to deform elastically. As a result, the impact force to which the tire 2 is subjected can be absorbed by at least one of the first elastic plates 51 and the second elastic plate 61. Thus, the impact force transmitted from the tire 2 to the electric motor 3 can be reduced.

[0082] Furthermore, the second imaginary straight line, which runs orthogonally to the second elastic plates 61, is orthogonal to the first imaginary straight line, which is orthogonal to the first elastic plates 51. Thus, the first elastic plates 51 and the second elastic plates 61 can be arranged uniformly in the circumferential direction of the tire 2. This arrangement allows the impact force to which the tire 2 is subjected in the circumferential direction to be balanced by a damping force.

[0083] Furthermore, the axis P of the tire 2 is located between the plates of the pair of first elastic plates 51 and between the plates of the pair of second elastic plates 61. The aforementioned positioning enables stabilization of the state in which the intermediate element 4 is coupled to the tire 2 and the state in which the electric motor 3 is coupled to the intermediate element 4. As a result, the occurrence of a malfunction of the wheel assembly 1 can be more reliably prevented, and consequently, the reliability of the wheel assembly 1 can be improved.

[0084] Furthermore, both end regions 511 of each of the first elastic plates 51 are attached longitudinally to the tire 2, and the longitudinally intervening region 512 of each of the first elastic plates 51 is attached to the intermediate element 4. Thus, a more reliable attachment of the first elastic plates 51 to the tire 2 and the intermediate element 4 can be ensured, while elastic deformation of the first elastic plates 51 in the thickness direction is possible.

[0085] Furthermore, both end regions 611 of each of the second elastic plates 61 are attached longitudinally to the intermediate element 4, and the longitudinally intermediate region 612 of each of the second elastic plates 61 is attached to the rotor 3b of the electric motor 3. Thus, a more reliable fastening condition of the second elastic plates 61 to the intermediate element 4 and the rotor 3b can be ensured, while elastic deformation of the second elastic plates 61 in the thickness direction is possible.

[0086] Furthermore, the inner peripheral surface 21 of the tire 2 has pairs of step regions 211. Each pair of step regions 211, into which both end regions 511 are to be fitted longitudinally of the first elastic plate 51, is formed at the positions where both end regions 511 are attached longitudinally to the first elastic plate 51 as a pair of fastening end regions. Thus, the first elastic plates 51 can be attached to the tire 2 more reliably, and consequently, positional displacement of each of the first elastic plates 51 relative to the tire 2 can be more reliably prevented.

[0087] Furthermore, the inner peripheral surface 41 of the intermediate element 4 has pairs of step regions 411. Each pair of step regions 411, into which both end regions 611 are to be fitted longitudinally along the second elastic plate 61, is formed at the positions where both end regions 611 are attached longitudinally along the second elastic plate 61 as a pair of fastening end regions. Thus, the second elastic plates 61 can be attached more reliably to the intermediate element 4, and consequently, positional displacement of each of the second elastic plates 61 relative to the intermediate element 4 can be more reliably prevented.

[0088] In the example described above, the electric motor 3, which is configured to generate torque, is arranged as a wheel main body inside the tire 2. As in Fig. As shown in Figure 13, however, a hub 7 without a function of generating a torque can be arranged as a wheel main body inside the tire 2.

[0089] In this case, hub 7 is coupled to an electric motor configured to generate torque. Hub 7 acts as a rotatable section, configured to rotate around axis P with the torque received from the electric motor. This also reduces the impact force transmitted from tire 2 to hub 7 and the electric motor.

[0090] Fig. Figure 14 is a perspective view of a wheel device according to a second embodiment of this invention. Fig. Figure 15 is a perspective view illustrating a state after the removal of an electric motor 3 from the wheel assembly according to Fig. 14. Fig. Figure 16 is a front view of the wheel assembly according to Fig. 14. Fig. 17 is a sectional view along a line XVII-XVII according to Fig. 16. Fig. 18 is a sectional view along a line XVIII-XVIII according to Fig. 16.

[0091] Adjacent to a tire 2 is an intermediate element 4 arranged in an axial direction of the tire 2, that is, in the direction of the Y-axis. In this example, the inner diameter of the intermediate element 4 is the same as the inner diameter of the tire 2. Furthermore, in this example, the outer diameter of the intermediate element 4 is smaller than the outer diameter of the tire 2.

[0092] On an inner peripheral surface 41 of the intermediate element 4, a pair of first supporting projection areas 414 are formed, each projecting radially inwards from the intermediate element 4. The positions of the first supporting projection areas 414 in the circumferential direction of the tire 2 are the same as the positions of the first elastic plates 51 in the circumferential direction of the tire 2. The positions of the first elastic plates 51 in the circumferential direction of the tire 2 are the same as those in the first embodiment.

[0093] Thus, one projection area of ​​the pair of first supporting projection areas 414 is arranged at a position leading the reference position A, which is specified on the Z-axis, by θ = 90° in the circumferential direction of the tire 2, and the other projection area of ​​the first supporting projection areas 414 is arranged at a position leading the reference position by θ = 270° in the circumferential direction of the tire 2. A radially inner end surface of each of the first supporting projection areas 414 is orthogonal to the direction along the first imaginary straight line, that is, to the direction of the X-axis.

[0094] On an outer peripheral surface 31 of a rotor 3b of the electric motor 3, a pair of second supporting projection areas 314 are formed, each projecting radially outwards from the rotor 3b. The positions of the second supporting projection areas 314 in the circumferential direction of the tire 2 are the same as the positions of the second elastic plates 61 in the circumferential direction of the tire 2. The positions of the second elastic plates 61 in the circumferential direction of the tire 2 are the same as those in the first embodiment.

[0095] Thus, one projection area of ​​the pair of second supporting projection areas 314 is located at the reference position A with θ = 0°, and the other projection area of ​​the second supporting projection areas 314 is located at a position leading θ = 180° with respect to the reference position A in the circumferential direction of the tire 2. A radially inner end surface of each of the second supporting projection areas 314 is orthogonal to the direction along the second imaginary straight line, that is, to the direction of the Z-axis.

[0096] Fig. Figure 19 is a perspective view of the first elastic plate 51 according to Fig. 15. Each of the first elastic plates 51 has a first main body plate region 513 with a rectangular shape and a first projecting plate region 514. The first projecting plate region 514 projects in the width direction of the first main body plate region 513 from a longitudinally interposed region of the first main body plate region 513. The first elastic plate 51 is a flat plate with a T-shaped form, formed by the first main body plate region 513 and the first projecting plate region 514. The width direction, the longitudinal direction, and the thickness direction of the first elastic plate 51 are each aligned with the width direction, the longitudinal direction, and the thickness direction of the first main body plate region 513.

[0097] As in Fig. As shown in Figure 16, each of the first elastic plates 51 is arranged orthogonally to the first imaginary straight line. In particular, the thickness direction of each of the first elastic plates 51 coincides with the direction along the first imaginary straight line, that is, with the direction of the X-axis. Furthermore, the width direction of each of the first elastic plates 51 coincides with the axial direction of the tire 2, that is, with the direction of the Y-axis. As a result of the arrangement described above, the longitudinal direction of each of the first elastic plates 51 coincides with the direction of the Z-axis, which is orthogonal to both the direction of the X-axis and the direction of the Y-axis. In particular, the pair of first elastic plates 51 is arranged parallel to the YZ-plane, which is orthogonal to the direction of the X-axis.

[0098] Both end regions 513a in the longitudinal direction of the first main body plate region 513 are attached as a pair of fastening end regions to an inner peripheral surface 21 of the tire 2. The first projecting plate region 514 is attached by inserting the first supporting projection region 414 as a single fastening plate region to the inner peripheral surface 41 of the intermediate element 4. Thus, the intermediate element 4 can move relative to the tire 2 by elastic deformation of the first elastic plates 51 in the thickness direction of the first elastic plates 51 in the direction along the first imaginary straight line, that is, in the direction of the X-axis.

[0099] Furthermore, the electric motor can move by means of an elastic deformation of the second elastic plates 61 in the thickness direction of the second elastic plates 61 in the direction along the second imaginary straight line, that is, in the direction of the Z-axis, with respect to the intermediate element 4.

[0100] A configuration in which both end regions 513a are attached longitudinally to the inner peripheral surface 21 of the tire 2 as a pair of attachment end regions along the first main body plate region 513 is the same as the configuration in the first embodiment in which both end regions 511 are attached longitudinally to the inner peripheral surface 21 of the tire 2 along the first elastic plates 51. Thus, the inner peripheral surface 21 of the tire 2 has pairs of step regions 211.

[0101] Each pair of step regions 211, in which both end regions 513a are to be fitted longitudinally of the first main body plate region 413, is formed at positions where both end regions 513a are attached longitudinally of each of the first main body plate regions 513 as a pair of fastening end regions to the inner peripheral surface 21 of the tire 2. Thus, a number of pairs of step regions 211 corresponding to the number of first elastic plates 51 is formed on the inner peripheral surface 21 of the tire 2.

[0102] The first projecting plate region 514 is in a state in which a surface of the same, orthogonal to the thickness direction of the first elastic plate 51, is held in contact with a radially inner end surface of the first supporting projection region 414, without leaving a gap, attached to the inner peripheral surface 41 of the intermediate element 4. This attachment maintains a state in which the thickness direction of the first projecting plate region 514 coincides with the direction along the first imaginary straight line, that is, with the direction of the X-axis.

[0103] By being attached to the radially inner end surface of the first supporting projection area 414, the first projecting plate area 514 is attached to the inner peripheral surface 41 of the intermediate element 4. A fastening method is used to attach the first projecting plate area 514 to the radially inner end surface of the first supporting projection area 414, for example, using screws, bolts, welding, or an adhesive.

[0104] Fig. Figure 20 is a perspective view of the second elastic plate 61 according to Fig. 15. Each of the second elastic plates 61 has a second main body plate area 613 with a rectangular shape and a second projecting plate area 614. The second projecting plate area 614 projects in the width direction of the second main body plate area 613 from a longitudinally interposed area of ​​the second main body plate area 613.

[0105] The second elastic plate 61 is a flat plate with a T-shaped form, formed by the second main body plate region 613 and the second projecting plate region 614. The width, length, and thickness directions of the second elastic plate 61 coincide with the width, length, and thickness directions, respectively, of the second main body plate region 613. In this example, the shape of the second elastic plate 61 is the same as the shape of the first elastic plate 51.

[0106] As in Fig. As shown in Figure 16, each of the second elastic plates 61 is arranged orthogonally to the second imaginary straight line. In particular, the thickness direction of each of the second elastic plates 61 coincides with the direction along the second imaginary straight line, that is, with the direction of the Z-axis. Furthermore, the width direction of each of the second elastic plates 61 coincides with the axial direction of the tire 2, that is, with the direction of the Y-axis.

[0107] As a result of the arrangement described above, the longitudinal direction of each of the second elastic plates 61 coincides with the direction of the X-axis, which is orthogonal to both the direction of the Y-axis and the direction of the Z-axis. In particular, the pair of second elastic plates 61 is arranged parallel to the XY plane, which is orthogonal to the direction of the Z-axis.

[0108] Both end regions 613a in the longitudinal direction of the second main body plate region 613 are attached as a pair of fastening end regions to the inner peripheral surface 41 of the intermediate element 4. The second projecting plate region 614 is attached as a single fastening plate region to the outer peripheral surface 31 of the rotor 3b by inserting the second supporting projection region 314.

[0109] A configuration in which both end regions 613a are attached longitudinally to the inner peripheral surface 41 of the intermediate element 4 as a pair of attachment end regions along the second main body plate region 613 is the same as the configuration in the first embodiment in which both end regions 611 are attached longitudinally to the inner peripheral surface 41 of the intermediate element 4 along the second elastic plate 61. Thus, the inner peripheral surface 41 of the intermediate element 4 has pairs of step regions 411.

[0110] Each pair of step regions 411, in which both end regions 613a are to be fitted longitudinally of the second main body plate region 613, is formed at positions where both end regions 613a are attached longitudinally of each of the second main body plate regions 613 as a pair of fastening end regions to the inner peripheral surface 41 of the intermediate element 4. Thus, a number of pairs of step regions 411 corresponding to the number of second elastic plates 61 is formed on the inner peripheral surface 41 of the intermediate element 4.

[0111] The second projecting plate region 614 is attached to the outer peripheral surface 31 of the rotor 3b in a state in which a surface of the same, orthogonal to the thickness direction of the second elastic plate 61, is held in contact with a radially outer end surface of the second supporting projection region 314, without leaving a gap. This attachment maintains a state in which the thickness direction of the second projecting plate region 614 coincides with the direction along the second imaginary straight line, that is, with the direction of the Z-axis.

[0112] By being attached to the radially outer end surface of the second supporting projection area 314, the second projecting plate area 614 is attached to the outer peripheral surface 31 of the rotor 3b. A fastening method is used to attach the second projecting plate area 614 to the radially outer end surface of the second supporting projection area 314, employing, for example, screws, bolts, welding, or an adhesive. Other configurations and operation are the same as in the first embodiment.

[0113] Even with the configuration described above, the stiffness of the first elastic plates 51 and the second elastic plates 61 in the circumferential direction of the tire 2 can be increased. This allows torque to be transmitted more reliably from the electric motor 3 to the tire 2. Furthermore, an impact force to which the tire 2 is subjected can be absorbed by at least one of the first elastic plates 51 and the second elastic plates 61. This reduces the impact force transmitted from the tire 2 to the electric motor 3.

[0114] Furthermore, the tire 2 and the intervening element 4 are arranged adjacent to each other along the axis P of the tire 2. Thus, the inner diameter of the intervening element 4 can be increased compared to a case where the intervening element 4 is located inside the tire 2. This increased diameter allows for a larger outer diameter of the electric motor 3, which serves as the main body of the wheel. If the outer diameter of the tire 2 is predetermined, the dimensions of the electric motor 3 located inside the tire 2 can be increased. Consequently, the torque generated by the electric motor 3 can be increased.

[0115] Furthermore, both end regions 513a are attached to the tire 2 longitudinally as a pair of fastening end regions along the first main body plate region 513. Additionally, the first projecting plate region 514 is attached to the intermediate element 4 as a single fastening plate region. Thus, the tire 2 and the intermediate element 4, which are arranged adjacent to each other along the axis P of the tire 2, can be coupled together, while elastic deformation of each of the first elastic plates 51 in the thickness direction is possible.

[0116] Furthermore, both end regions 613a are attached longitudinally to the intermediate element 4 as a pair of fastening end regions along the second main body plate region 613. Additionally, the second projecting plate region 614 is attached to the rotor 3b as a single fastening plate region. Thus, the intermediate element 4 and the rotor 3b can be coupled together, while elastic deformation of each of the second elastic plates 61 in the thickness direction is possible.

[0117] Furthermore, the first projecting plate area 514 is attached to the inner peripheral surface 41 of the intermediate element 4 by inserting the first supporting projection area 414. Even though the inner peripheral surface 41 of the intermediate element 4 is separated in the radial direction of the tire 2 from the first elastic plates 51, each of which is a flat plate, the first elastic plate 51 can thus be easily attached to the inner peripheral surface 41 of the intermediate element 4 without the first elastic plates 51 bending.

[0118] Furthermore, the second projecting plate area 614 is attached to the outer peripheral surface 31 of the rotor 3b by inserting the second supporting projection area 314. Even though the outer peripheral surface 31 of the rotor 3b is separated in the radial direction of the tire 2 from the second elastic plates 61, each of which is a flat plate, the second elastic plate 61 can thus be easily attached to the outer peripheral surface 31 of the rotor 3b without the second elastic plates 61 bending.

[0119] Furthermore, the shape of the second elastic plate 61 is the same as the shape of the first elastic plate 51. Therefore, a single manufacturing step can be used for both the first elastic plate 51 and the second elastic plate 61. Additionally, the elastic constants of the first elastic plate 51 and the second elastic plate 61 can be easily determined.

[0120] In the example described above, the electric motor 3, which is configured to generate torque, is arranged inside the tire 2 as the main wheel body. As in Fig. As shown in Figure 21, a hub 7 without a torque-generating function can be arranged within the tire 2 and the intervening element 4 as the wheel main body. In this case, the hub 7 is coupled to an electric motor configured to generate torque.

[0121] The hub 7 serves as a rotating area configured to rotate around axis P with a torque received from an electric motor. This also reduces the impact force transmitted from the tire 2 to the hub 7 and the electric motor.

[0122] Furthermore, in the example described above, the inner diameter of the intermediate element 4 is the same as the inner diameter of the tire 2. However, the inner diameter of the intermediate element 4 can also be larger than the inner diameter of the tire 2. Furthermore, the inner diameter of the intermediate element 4 can also be smaller than the inner diameter of the tire 2.

[0123] Fig. Figure 22 is a perspective view of a wheel device according to a third embodiment of this invention. Fig. Figure 23 is a perspective view illustrating a state after the removal of an electric motor 3 from the wheel assembly according to Fig. 22. Fig. Figure 24 is a front view of the wheel assembly according to Fig. 22. Fig. 25 is a sectional view along a line XXV-XXV according to Fig. 24. Fig. 26 is a sectional view along a line XXVI-XXVI according to Fig. 24.

[0124] As in Fig. As shown in Figure 24, an inner peripheral surface 41 of an intermediate element 4 has a pair of inner peripheral planar surface regions 416 of the intermediate element that are orthogonal to the direction along the first imaginary straight line, that is, to the direction of the X-axis. The positions of the inner peripheral planar surface regions 416 of the intermediate element in a circumferential direction of a tire 2 are the same as the positions of first elastic plates 51 in the circumferential direction of the tire 2. The positions of the first elastic plates 51 in the circumferential direction of the tire 2 are the same as those in the second embodiment.

[0125] Thus, one surface area of ​​the pair of inner peripheral planar surface areas 416 of the intermediate element is arranged at a position leading θ = 90° in the circumferential direction of the tire 2 with respect to the reference position A, which is specified on the Z-axis, and the other surface area of ​​the inner peripheral planar surface areas 416 of the intermediate element is arranged at a position leading θ = 270° in the circumferential direction of the tire 2 with respect to the reference position A.

[0126] As in Fig. As shown in Figure 26, an inner peripheral surface 21 of the tire 2 has a pair of inner peripheral planar surface regions 216 of the tire that are orthogonal to the direction along the first imaginary straight line, that is, to the direction of the X-axis. The positions of the inner peripheral planar surface regions 216 of the tire in the circumferential direction of the tire 2 are the same as the positions of the first elastic plates 51 in the circumferential direction of the tire 2.

[0127] Thus, one surface area of ​​the pair of inner peripheral planar surface areas 216 of the tire is arranged at a position leading θ = 90° in the circumferential direction of the tire 2 with respect to the reference position A, which is specified on the Z-axis, and the other surface area of ​​the inner peripheral planar surface areas 216 of the tire is arranged at a position leading θ = 270° in the circumferential direction of the tire 2 with respect to the reference position A.

[0128] As in Fig. As shown in Figure 25, an outer peripheral surface 31 of a rotor 3b of the electric motor 3 has a pair of outer peripheral planar surface regions 316 that are orthogonal to the direction along the second imaginary straight line, that is, to the direction of the Z-axis. The positions of the outer peripheral planar surface regions 316 in the circumferential direction of the tire 2 are the same as the positions of the second elastic plates 61 in the circumferential direction of the tire 2.

[0129] The positions of the second elastic plates 61 in the circumferential direction of the tire 2 are the same as in the second embodiment. Thus, one surface area of ​​the pair of outer peripheral planar surface areas 316 is arranged at the reference position A with θ = 0°, and the other surface area of ​​the outer peripheral planar surface areas 316 is arranged at a position leading θ = 180° with respect to the reference position A in the circumferential direction of the tire 2.

[0130] Fig. Figure 27 is a perspective view of the first elastic plate 51 according to Fig. 23. Each of the first elastic plates 51 is a flat plate with a rectangular shape. One longitudinal end region of each of the first elastic plates 51 is designed as a flat plate region 515 on the side of the tire. The other longitudinal end region of each of the first elastic plates 51 is designed as a flat plate region 516 on the side of the intermediate element.

[0131] As in Fig. As shown in Figure 24, each of the first elastic plates 51 is arranged orthogonally to the first imaginary straight line. In particular, the thickness direction of each of the first elastic plates 51 coincides with the direction along the first imaginary straight line, that is, with the direction of the X-axis. Furthermore, the longitudinal direction of each of the first elastic plates 51 coincides with the axial direction of the tire 2, that is, with the direction of the Y-axis.

[0132] As a result of the arrangement described above, the lateral direction of each of the first elastic plates 51 coincides with the direction of the Z-axis, which is orthogonal to both the direction of the X-axis and the direction of the Y-axis. In particular, the pair of first elastic plates 51 is arranged parallel to the YZ-plane, which is orthogonal to the direction of the X-axis.

[0133] The flat plate area 515 on the side of the tire of each of the first elastic plates 51 is attached as a single mounting plate area to the inner peripheral surface 21 of the tire 2. The flat plate area 516 on the side of the intermediate element of each of the first elastic plates 51 is attached as a single mounting plate area to the inner peripheral surface 41 of the intermediate element 4. The tire 2 and the intermediate element 4 are coupled to each other by insertion of the first elastic plates 51.

[0134] Thus, the intermediate element 4 can move relative to the tire 2 by means of an elastic deformation of the first elastic plates 51 in the thickness direction of the first elastic plates 51 in the direction along the first imaginary straight line, that is, in the direction of the X-axis. Furthermore, the electric motor 3 can move relative to the intermediate element 4 by means of an elastic deformation of the second elastic plates 61 in the thickness direction of the second elastic plate 61 in the direction along the second imaginary straight line, that is, in the direction of the Z-axis.

[0135] The flat plate area 515 on the side of the tire of each of the first elastic plates 61 is in a state in which a surface of the same, which is orthogonal to the thickness direction of the first elastic plate 51, is held in contact with the inner peripheral flat surface area 216 of the tire, without leaving a gap, attached to the inner peripheral surface 21 of the tire 2.

[0136] The planar plate region 516 on the side of the interposed element of each of the first elastic plates 51 is in a state in which a surface of the same, orthogonal to the thickness direction of the first elastic plate 51, is held in contact with the inner peripheral planar surface region 416 of the interposed element, without leaving a gap, attached to the inner peripheral surface 41 of the interposed element 4. As a result, a state is maintained in which the thickness direction of each of the first elastic plates 51 coincides with a first direction, that is, with the direction of the X-axis.

[0137] As a method for attaching the flat plate areas 515 on the side of the tire to the inner peripheral flat surface areas 216 of the tire and as a method for attaching the flat plate areas 516 on the side of the intermediate element to the inner peripheral flat surface areas 416 of the intermediate element, a fastening method is used in which, for example, screws, bolts, welding or an adhesive is used.

[0138] Each of the second elastic plates 61 has the same configuration as the second elastic plate in the second embodiment. As in Fig. As shown in Figure 24, each of the second elastic plates 61 is arranged orthogonally to the second imaginary straight line. In particular, the thickness direction of each of the second elastic plates 61 coincides with the direction along the second imaginary straight line, that is, with the direction of the Z-axis.

[0139] Furthermore, the lateral direction of each of the second elastic plates 61 coincides with the axial direction of the tire 2, that is, with the direction of the Y-axis. As a result of the arrangement described above, the longitudinal direction of each of the second elastic plates 61 coincides with the direction of the X-axis. In particular, the pair of second elastic plates 61 is arranged parallel to the XY plane, which is orthogonal to the direction of the Z-axis.

[0140] Both end regions 613a in the longitudinal direction of a second main body plate region 613 are attached as a pair of mounting end regions to the inner peripheral surface 41 of the intermediate element 4. A second projecting plate region 614 is attached as a single mounting plate region to the outer peripheral surface 31 of the rotor 3b. A configuration in which both end regions 613a in the longitudinal direction of the second main body plate region 613 are attached as a pair of mounting end regions to the inner peripheral surface 41 is the same as the configuration in the second embodiment.

[0141] Thus, the inner peripheral surface 41 of the intermediate element 4 has 4 pairs of step regions 411. Each of the pairs of step regions 411, in which both end regions 613a are to be fitted longitudinally of the second main body plate region 613, is formed at positions where both end regions 613a are attached longitudinally of each of the second main body plate regions 613 as a pair of fastening end regions to the inner peripheral surface 41 of the intermediate element 4.

[0142] Thus, on the inner peripheral surface 41 of the intermediate element 4, a number of pairs of step regions 411 are formed, corresponding to the number of second elastic plates 61.

[0143] The second projecting plate region 614 is in a state in which a surface of the same, orthogonal to the thickness direction of the second elastic plate 61, is held in contact with the outer peripheral planar surface region 316 of the rotor 3b without leaving a gap, attached to the outer peripheral surface 31 of the rotor 3b. This attachment maintains a state in which the thickness direction of the second projecting planar plate region 614 coincides with the direction along the second imaginary straight line, that is, with the direction of the Z-axis.

[0144] The second projecting plate area 614 is attached to the outer peripheral flat surface 316 of the rotor 3b by means of attachment to the outer peripheral surface 316 of the rotor 3b. A fastening method is used for attaching the second projecting plate area 614 to the outer peripheral flat surface 316 of the rotor 3b, for example, using screws, bolts, welding, or an adhesive. Other configurations and operation are the same as in the second embodiment.

[0145] Even with the configuration described above, the stiffness of the first elastic plates 51 and the second elastic plates 61 in the circumferential direction of the tire 2 can be increased. This allows torque to be transmitted more reliably from the electric motor 3 to the tire 2. Furthermore, an impact force to which the tire 2 is subjected can be absorbed by at least one of the first elastic plates 51 and the second elastic plates 61. This reduces the impact force transmitted from the tire 2 to the electric motor 3.

[0146] Furthermore, the flat plate area 515 on the side of the tire, which is one end area in the longitudinal direction of each of the first elastic plates 51, is attached to the tire 2 as a single mounting plate area. Furthermore, the flat plate area 516 on the side of the intermediate element, which is the other end area in the longitudinal direction of each of the first elastic plates 51, is attached to the intermediate element 4 as a single mounting plate area.

[0147] Thus, the tire 2 and the intervening element 4, which are arranged adjacent to each other in the axial direction of the tire 2, can be coupled together, while elastic deformation of each of the first elastic plates 51 in the thickness direction is possible. Furthermore, the shape of each of the first elastic plates 51 can be simplified.

[0148] Furthermore, the first elastic plates 51 are attached to the inner peripheral planar surface areas 216 of the tire, the inner peripheral surface 21 of the tire 2, and the inner peripheral planar surface areas 416 of the intermediate element 4. Furthermore, the second projecting plate areas 614 of the second elastic plates 61 are attached to the outer peripheral planar surface areas 316 of the outer peripheral surface 31 of the rotor 3b.

[0149] Thus, the first elastic plates 51 and the second elastic plates 61 can be positioned closer to the inner peripheral surface 21 of the tire 2 and the inner peripheral surface 41 of the intermediate element 4, respectively. As a result, the gaps defined within the first elastic plates 51 and the second elastic plates 61 on the inner surface of the tire 2 and the intermediate element 4, respectively, can be enlarged. If the outer diameter of the tire 2 is predetermined, the dimensions of the electric motor 3 to be positioned within the tire 2 can therefore be increased. Consequently, a further increase in the torque generated by the electric motor 3 can be achieved.

[0150] In the example described above, the electric motor 3, which is configured to generate torque, is arranged as a wheel main body inside the tire 2. As in Fig. However, as shown in Figure 28, a hub 7 can be arranged as a wheel main body without a function of generating a torque within the tire 2 and the intermediate element 4.

[0151] In this case, hub 7 is coupled to an electric motor configured to generate torque. Hub 7 acts as a rotatable section, configured to rotate around axis P with the torque received from the electric motor. This also reduces the impact force transmitted from tire 2 to hub 7 and the electric motor.

[0152] Fig. Figure 29 is a front view of a wheel device according to a fourth embodiment of this invention. In each of the outer peripheral planar surface areas 421 of an outer peripheral surface 42 of an intermediate element 4, a recess area 422 is formed.

[0153] In particular, the outer peripheral surface 42 of the intermediate element 4 has the recess areas 422 which are formed at positions where longitudinally intermediate areas 512 of the first elastic plates 51 are each attached as a single fastening plate area.

[0154] A projection element 52 is attached to the longitudinally interposed area 512 of the first elastic plate 51, and is to be inserted into the recess area 422. The projection element 52 is inserted into the recess area 522 without leaving a gap.

[0155] In each of the outer peripheral planar surface regions 311 of an outer peripheral surface 31 of a rotor 3b, a recess region 312 is formed. In particular, the outer peripheral surface 31 of the rotor 3b has the recess regions 312 which are formed at positions where longitudinally intervening regions 612 of the second elastic plates 61 are each attached as a single mounting plate region.

[0156] A projection element 62 is attached to the longitudinally interposed area 612 of the second elastic plate 61, which fits into the recess area 612. The projection element 62 fits into the recess area 312 without leaving a gap. Other configurations and operation are the same as in the first embodiment.

[0157] In the wheel assembly 1 described above, the outer peripheral surface 42 of the intermediate element 4 has the recess areas 422 which are formed at the positions where the longitudinally intermediate areas 512 of the first elastic plates are each attached as a single mounting plate area.

[0158] Furthermore, the projecting elements 52, which are to be fitted into the recess areas 522, are attached to the longitudinally intervening areas 512 of the first elastic plates 51. This allows the first elastic plates 51 to be positioned more reliably in a circumferential direction of the tire 2 with respect to the intervening element 4. As a result, torque can be transmitted more reliably from an electric motor 3 to the tire 2.

[0159] Furthermore, the outer peripheral surface 31 of the rotor 3b has recess areas 312, which are formed at the positions where the longitudinally interposed areas 612 of the second elastic plates 61 are each attached as a single mounting plate area. Additionally, the projection elements 62, which are to be fitted into the recess areas 312, are attached to the longitudinally interposed areas 612 of the second elastic plates 61. Thus, the second elastic plates 61 can be positioned more reliably in the circumferential direction of the tire 2 with respect to the rotor 3b. As a result, torque can be transmitted more reliably from the electric motor 3 to the tire 2.

[0160] In the example described above, the projection element 52 is attached to the longitudinally intervening region 512 of the first elastic plate 51, according to the first embodiment. However, according to the second embodiment, a projection element can also be attached to the first projecting plate region 514 of the first elastic plate 51.

[0161] In this case, recess areas, into which the projection elements attached to the first protruding plate areas 514 are to be fitted, are formed in the first supporting projection areas 414 of the inner peripheral surface 41 of the intermediate element 4. The first supporting projection areas 414 are formed at positions where the first protruding plate areas 514 are each attached as a single fastening plate area.

[0162] Furthermore, protruding elements according to the third embodiment can be attached to the flat plate area 515 on the side of the tire or to the flat plate area 516 on the side of the intermediate element of the first elastic plate 51. In this case, recess areas in which the protruding elements attached to or fitted to the flat plate areas 515 on the side of the tire are to be fitted are formed in the inner peripheral surface 21 of the tire 2.

[0163] The recess areas are formed at positions where the flat plate areas 515 are attached to the side of the tire as a single mounting plate area. Furthermore, in this case, recess areas are formed in the inner peripheral surface 41 of the intermediate element 4, in which the projection elements attached to the flat plate areas 516 on the side of the intermediate element are to be fitted.

[0164] The recess areas are formed at positions where the flat plate areas 516 are each attached as a single fastening plate area on the side of the intervening element.

[0165] Furthermore, in the example described above, the projection element 62 is attached to the longitudinally interposed area 612 of the second elastic plate 61 according to the first embodiment. However, according to the second embodiment, a projection element can also be attached to the second projecting plate area 614.

[0166] In this case, recess areas, into which the projection elements attached to the second protruding plate areas 614 are to be fitted, are formed in the second supporting projection areas 314 of the outer peripheral surface 31 of the rotor 3b. The second supporting projection areas 314 are formed at positions where the second protruding plate areas 614 are each attached as a single mounting plate area.

[0167] Furthermore, protruding elements according to the third embodiment can be attached to the second projecting plate areas 614. In this case, recess areas into which the protruding elements attached to the second projecting plate areas 614 are to be fitted are formed in the outer peripheral surface 31 of the rotor 3b. The recess areas are formed at positions where the second projecting plate areas 614 are each attached as a single mounting plate area.

[0168] Fig.Figure 30 is a perspective exploded view of a first elastic plate of a wheel device according to a fifth embodiment of this invention. Each of the first elastic plates 51 is a laminated plate comprising a plurality of thin plates 510. The plurality of thin plates 510 are laminated in the thickness direction of the first elastic plate 51. In this example, the plates of the plurality of thin plates 510 are merely in contact with each other and are not attached to one another. Other configurations and operation are the same as in the first embodiment.

[0169] In the wheel assembly 1 described above, the laminated plate, which comprises a plurality of thin plates 510 laminated together, is used as the first elastic plate 51. When the first elastic plate 51 is elastically deformed, a frictional force between the multiple thin plates 510 can act as a damping element. Even if the elastic deformation of the first elastic plate 51 causes resonance of the electric motor 3 with respect to the tire 2, the resonance-response ratio can be reduced as a result.

[0170] In particular, when the electric motor 3 resonates with respect to the tire 2, stresses increase, for example, on the first elastic plates 51, the second elastic plates 61, and the electric motor 3. If the laminated plate, obtained by laminating a plurality of thin plates 510, is used as the first elastic plate 51, the resonance of the electric motor 3 with respect to the tire 2 can be slightly dampened by the frictional force between the plural of thin plates 510.

[0171] This allows damage to the wheel assembly 1 to be prevented more reliably. The damping effect of the laminated plate, which consists of the majority of thin plates 510, can be adjusted by changing the number of thin plates 510 to be laminated.

[0172] In the example described above, the laminated plate, which comprises a plurality of thin plates 510 laminated together, is used as the first elastic plate 51 according to the first embodiment. However, a laminated plate comprising a plurality of thin plates laminated together can also be used as the first elastic plate 51 according to any of the second to fifth embodiments. Furthermore, a laminated plate comprising a plurality of thin plates laminated together can also be used as the second elastic plate 61 according to any of the first to fifth embodiments.

[0173] Furthermore, in each of the embodiments described above, two first elastic plates 51 are included in the first coupling structure unit 5. However, the number of first elastic plates 51 included in the first coupling structure unit 5 can also be one.

[0174] Furthermore, in each of the embodiments described above, two second elastic plates 61 are included in the second coupling structure unit 6. However, the number of second elastic plates 61 included in the second coupling structure unit 6 can also be one.

[0175] Furthermore, in each of the embodiments described above, the second imaginary straight line, which is orthogonal to the second elastic plates 61, is orthogonal to the first imaginary straight line, which is orthogonal to the first elastic plates 51. However, it is not necessary for the second imaginary straight line to be orthogonal to the first imaginary straight line, as long as the second imaginary straight line is a straight line that is orthogonal to the axis P of the tire 2 and that it differs from the first imaginary straight line.

[0176] Furthermore, in each of the embodiments described above, the tire 2 is made of a metal, such as iron. However, the tire 2 can also be made of an elastic material, such as rubber. REFERENCE MARK LIST 1 wheel setup 2 tires 3 Electric motor (wheel main body) 3b Rotor (rotating area) 4 intermediate element 5 first coupling structure unit 6 second coupling structure unit 51 first elastic plate 52 Protrusion element 61 second elastic plate 62 Protrusion element 211 step range 411 step range 312 Recess area 422 Recess area 510 thin plate 511 both end regions in the longitudinal direction of the first elastic plate 512 longitudinally intermediate area of ​​the first elastic plate 513 first main body plate area 513a both end areas in the longitudinal direction of the first main body plate area 514 first protruding plate area 515 flat plate area on the side of the tire (which is one end area in the longitudinal direction of the first elastic plate) 516 flat plate area on the side of the intermediate element (the other end area in the longitudinal direction of the first elastic plate) 611 both end areas in the longitudinal direction of the second elastic plate 612 longitudinally intermediate area of ​​the second elastic plate 613 second main body plate area 613a both end areas in the longitudinal direction of the second main body plate area 614 second protruding plate area

Claims

[1] Wheel assembly comprising the following: - a tire (2) with a ring-shaped form; - a wheel main body (3, 7) having a rotatable area (3b, 7); - an intermediate element (4) which is an element separate from each of the tire (2) and the wheel main body (3, 7); - a first coupling structure unit (5) comprising a first elastic plate (51) configured to couple the tire (2) and the intermediate element (4); - a second coupling structure unit (6) comprising a second elastic plate (61) configured to couple the rotatable area (3b) and the intermediate element (4), - wherein the rotatable area (3b, 7) and the intermediate element (4) are arranged coaxially to the tire (2), - wherein, if a straight line that is orthogonal to an axis of the tire (2) is defined as a first imaginary straight line, the first elastic plate (51) is arranged orthogonally to the first imaginary straight line, - wherein, if a straight line which is orthogonal to the axis of the tire (2) and which differs from the first imaginary straight line is defined as a second imaginary straight line, the second elastic plate (61) is arranged orthogonally to the second imaginary straight line, - wherein the intermediate element (4) can move in the thickness direction of the first elastic plate (51) with respect to the tire (2) by means of an elastic deformation of the first elastic plate (51) and - wherein the wheel main body (3, 7) can move in the thickness direction of the second elastic plate (61) in relation to the intermediate element (4) by means of an elastic deformation of the second elastic plate (61). [2] Wheel device according to claim 1, wherein the second imaginary straight line is orthogonal to the first imaginary straight line. [3] Wheel device according to claim 1 or 2, - wherein the first coupling structure unit (5) comprises a pair of the first elastic plates (51), - wherein the second coupling structure unit (6) comprises a pair of the second elastic plates (61) and - wherein the axle of the tire (2) is located between the plates of the pair of first elastic plates (51) and between the plates of the pair of second elastic plates (61). [4] Wheel device according to one of claims 1 to 3, - wherein the longitudinal direction of the first elastic plate (51) coincides with a direction that is orthogonal to both the direction along the axis of the tire (2) and the direction along the first imaginary straight line, - wherein both end regions (511) are attached to the tire (2) in the longitudinal direction of the first elastic plate (51) as a pair of attachment end regions and - wherein a longitudinally intermediate area (512) of the first elastic plate (51) is attached as a single fastening plate area to the intermediate element (4). [5] Wheel device according to any one of claims 1 to 4, - wherein the longitudinal direction of the second elastic plate (61) coincides with a direction that is orthogonal to both the direction along the axis of the tire (2) and the direction along the second imaginary straight line, - wherein both end regions (611) are attached in the longitudinal direction of the second elastic plate (61) as a pair of fastening end regions to the intermediate element (4) and - wherein a longitudinally intermediate area (612) of the second elastic plate (61) is attached as a single mounting plate area to the rotatable area (3b, 7). [6] Wheel device according to one of claims 1 to 3, wherein the intermediate element (4) is arranged in the direction along the axis of the tire (2) adjacent to the tire (2). [7] Wheel device according to claim 6, - wherein the first elastic plate (51) has a first main body plate region (513) and a first projecting plate region (514) which projects in the width direction of the first main body plate region (513) from a longitudinally interposed region of the first main body plate region (513), - wherein both end regions (513a) are attached to the tire (2) in the longitudinal direction of the first main body plate region (513) as a pair of attachment end regions and - wherein the first protruding plate area (514) is attached as a single fastening plate area to the intermediate element (4). [8] Wheel device according to claim 6, - wherein one end area (515) is attached to the tire (2) in the longitudinal direction of the first elastic plate (51) as a single mounting plate area and - wherein the other end region (516) is attached in the longitudinal direction of the first elastic plate (51) as a single fastening plate region to the intermediate element (4). [9] Wheel device according to one of claims 6 to 8, - wherein the second elastic plate (61) has a second main body plate region (613) and a second projecting plate region (614) which projects in the width direction of the second main body plate region (613) from a longitudinally interposed region of the second main body plate region (613), - wherein both end regions (613a) are attached in the longitudinal direction of the second main body plate region (613) as a pair of fastening end regions to the intermediate element (4) and - wherein the second protruding plate area (614) is attached as a single mounting plate area to the rotatable area (3b, 7). [10] Wheel device according to one of claims 4, 5, 7 and 9, wherein at least one of the tire (2) and the intermediate element (4) has a pair of step regions (211, 411) in which the pair of fastening end regions (511, 611, 513a, 613a) is fitted, wherein the pair of step regions (211, 411) is formed at positions where the pair of fastening end regions (511, 611, 513a, 613a) is attached. [11] Wheel device according to one of claims 4, 5 and 7 to 9, - wherein each of the tire (2), the intermediate element (4) and the rotatable area (3b, 7) has a recess area (312, 422) formed at a position where the individual mounting plate area (512, 612, 514, 614, 515, 516) is attached, and - wherein a projection element (52, 62) to be fitted in the recess area (312, 422) is attached to the individual mounting plate area (512, 612, 514, 614, 515, 516). [12] Wheel device according to any one of claims 1 to 11, wherein at least one of the first elastic plate (51) and the second elastic plate (61) is a laminated plate comprising a plurality of thin plates (510) laminated together.

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