Electrically powered mobile device

Abstract

An electric mobile apparatus having at least a vehicle body frame (121) and a pair of wheels (20) includes: a pair of swing portions (2) each of which is supported to the vehicle body frame (121) so as to swing in a vertical direction about a swing axis (150a) extending in a vehicle front-rear direction, with one end in a vehicle width direction as a base end and the other end in the vehicle width direction as a top end, each wheel (20) being supported to the swing portion (2) so as to move in the vertical direction with the top end side of the swing portion (2); a force applying member (140) applying a force toward the lower side to each swing portion (2) when the top end side moves upward; and a swing control portion (3) suppressing different-direction swing of one of the base end sides of the pair of swing portions (2) relative to the other toward different directions in the vertical direction, or limiting the different-direction swing to a predetermined range.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an electrically driven mobile device. BACKGROUND

[0002] As such an electrically driven mobile device, there is known an electrically driven mobile device including a pair of swing bases supported to a vehicle body frame in a manner swingable in a vertical direction, a pair of rear wheels supported to the pair of swing bases, respectively, and a force applying member applying a force toward the lower side to the pair of swing bases. See, for example, Patent Literature 1.

[0003] Patent Literature 1: International Publication No. 2021 / 132533

[0004] In the electrically driven mobile device, if a force applying member having a low spring constant is adopted and the swingable range in the vertical direction of each swing base is increased in order to become a soft suspension characteristic, the ride comfort is improved, but the electrically driven mobile device is likely to have a tendency to lean toward the outside in steering or turning. SUMMARY

[0005] In view of the circumstances, an electrically driven mobile device capable of controlling the tendency to lean toward the outside in steering or turning is expected.

[0006] One embodiment of the present application relates to an electrically driven mobile device having at least a vehicle body frame and a pair of vehicle wheels, including: a pair of swing portions, each swing portion being supported to the vehicle body frame on the base end side in a manner swingable in a vertical direction about a swing axis extending in a vehicle front-rear direction when an end of each swing portion in a vehicle width direction is taken as a base end and the other end in the vehicle width direction is taken as a top end, each rear wheel being supported to the swing portion in a manner moving in the vertical direction with the top end side of each swing portion; a force applying member applying a force toward the lower side to each swing portion when the top end side moves upward; and a swing control portion suppressing swing of one of the base end sides of the pair of swing portions relative to the other in different directions in the vertical direction, or restricting the swing in different directions within a predetermined range. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 FIG. 1 is a rear perspective view of an electrically driven mobile device of one embodiment.

[0008] Figure 2 FIG. 2 is a side view of the electrically driven mobile device of the embodiment.

[0009] Figure 3 FIG. 3 is a front view of the electrically driven mobile device of the embodiment.

[0010] Figure 4 FIG. 4 is a bottom view of the electrically driven mobile device of the embodiment.

[0011] Figure 5 is a plan view of the rear wheel side vehicle body of the electric moving device of the present embodiment.

[0012] Figure 6 is a partial cross-sectional view of the rear wheel side vehicle body of the electric moving device of the present embodiment.

[0013] Figure 7 is a plan view of the rear wheel side vehicle body of the electric moving device of the present embodiment. Figure 5 is a IV-IV line cross-sectional view of

[0014] Figure 8 is a bottom view of the rear wheel side vehicle body of the electric moving device of the present embodiment.

[0015] Figure 9 is a detail perspective view of the rear wheel side vehicle body of the electric moving device of the present embodiment.

[0016] Figure 10 is a rear view of the swing base and the swing control section of the first modification of the electric moving device of the present embodiment.

[0017] Figure 11 is a detail perspective view of the rear wheel side vehicle body and the swing control section of the first modification of the electric moving device of the present embodiment.

[0018] Figure 12 is a rear view of the swing base and the swing control section of the second modification of the electric moving device of the present embodiment.

[0019] Figure 13 is a rear view of the swing base and the swing control section of the third modification of the electric moving device of the present embodiment.

[0020] Figure 14 is a rear view of the swing base and the swing control section of the fourth modification of the electric moving device of the present embodiment.

[0021] Figure 15 is a rear view of the swing base and the swing control section of the fifth modification of the electric moving device of the present embodiment.

[0022] Figure 16 is a rear view of the swing base and the swing control section of the sixth modification of the electric moving device of the present embodiment.

[0023] Figure 17 is a side view of the front wheel of the electric moving device of the present embodiment.

[0024] Figure 18 is a XVIII-XVIII line cross-sectional view of Figure 17 ​

[0025] Figure 19 yes Figure 17 Cross-sectional view of the XIX-XIX line in the diagram.

[0026] Figure 20 Is Figure 18 The XX-XX line cross-sectional view shows the installation of nuts on the wheel hub component.

[0027] Figure 21 This is a rear perspective view of the electric mobile device according to this embodiment.

[0028] Figure 22 This is a side view of the electric mobile device in its traction state according to this embodiment.

[0029] Figure 23 This is a block diagram of the control unit of the electric mobile device according to this embodiment.

[0030] Figure 24 This is a side view of the electric mobile device in its storage state according to this embodiment. Detailed Implementation

[0031] The electric mobile device 1 according to one embodiment of the present invention will be described below with reference to the accompanying drawings.

[0032] like Figures 1-4 As shown, the electric mobile device 1 has a mobile device body 30. The mobile device body 30 has a front wheel 10, a pair of rear wheels (wheels) 20, and a body 31 supported by the front wheel 10 and the rear wheels 20. Furthermore, the electric mobile device 1 has a seat unit 40 that is detachably mounted to the mobile device body 30. The electric mobile device 1 of this embodiment is an electric mobile device in which a person sits and rides on the seat unit 40. Such a vehicle is sometimes also called a personal mobility vehicle. In the following description, the vehicle's front-to-back direction is sometimes simply referred to as the front-to-back direction, and the vehicle's width direction is sometimes simply referred to as the width direction. Furthermore, the vehicle's front-to-back direction coincides with the front-to-back direction of the mobile device body 30 or the body 31, and the vehicle's width direction coincides with the width direction of the mobile device body 30 or the body 31. Furthermore, the following description is basically directed at the electric mobile device 1 placed on a horizontal plane in an unloaded state or a state with a predetermined load applied. An example of a state with a predetermined load applied is a state in which an object or person of the permissible weight of the electric mobile device 1, or an object or person of 2 / 3 of the permissible load, is placed on the seat unit 40.

[0033] In this embodiment, such as Figure 6 and Figure 7As shown, each of the two rear wheels 20 is connected to the output shaft 51 of a motor 50, and each motor 50 can drive the two rear wheels 20 respectively. In this embodiment, the output shaft 51 of the motor 50 functions as the axle of the rear wheel 20. On the other hand, the driving force of the motor 50 can also be configured to be transmitted to the front wheel 10 via power transmission components such as belts, gears, shafts, and the axles of the rear wheel 20.

[0034] The front wheel 10 is supported on the vehicle body 31. In this embodiment, the front wheel 10 has: a hub 12 rotatably supported on the vehicle body 31; and an outer peripheral member 13 disposed on the outer peripheral side of the hub 12, the outer peripheral surface of which is formed of a rubber-like elastic material such as rubber or silicone. The front wheel 10 is configured to rotate using a bearing or other axial support member (not shown).

[0035] In this embodiment, each rear wheel 20 has: an axle serving as the output shaft 51 of the motor 50; a hub 22 mounted on the axle; and an outer peripheral member 23 disposed on the outer peripheral side of the hub 22, the outer peripheral surface of which is formed of a rubber-like elastic material such as rubber or silicone.

[0036] In this embodiment, the front wheel 10 and the rear wheel 20 can be pneumatic tires or solid tires made of a rubbery elastic material up to the inside.

[0037] The mobile device body 30 has a front wheel side body 110 and a rear wheel side body 120, the rear wheel side body 120 being detachably connected to the front wheel side body 110. The front wheel side body 110 has a front wheel side frame 111, which is formed by extending along the ground in the middle and / or front end of the front-rear direction, and the axle of the front wheel 10 is mounted on the front wheel suspension 160 by means of a coil spring or the like. The rear end of the front wheel side frame 111 is a vertically extending frame 111a, and a seat unit 40 is mounted on the upper end of the vertically extending frame 111a. In addition, the front wheel side body 110 has a front wheel side cover 110a, which is configured to cover at least a portion of the front wheel side frame 111, and can be flexibly used for the protection of the front wheel side frame 111, the support of the feet of the passenger seated in the seat unit 40, the luggage compartment, the mudguard, etc.

[0038] The front wheel side frame 111 is made of a material suitable for obtaining the strength of metals, etc.

[0039] like Figure 1 , Figure 4 As shown, the rear wheel side body 120 has a rear wheel side frame (body frame) 121 and a rear wheel side cover 120a. Figure 5The rear wheel side cover 120a is provided to cover at least a portion of the rear wheel side frame 121, and is flexibly used for protection, a mudguard, and the like of the rear wheel side frame 121. The vehicle body frame that forms the entire mobile device main body 30 is formed of the front wheel side frame 111 and the rear wheel side frame 121.

[0040] The rear wheel side frame 121 is composed of a material suitable for obtaining strength of metal or the like.

[0041] Further, as shown in Figs. 1 and 2, a pair of roll-over preventing members 126 in the width direction are detachably provided to the rear wheel side frame 121 to prevent the electric mobile device 1 from overturning toward the rear of the vehicle. Figure 1

[0042] Further, as shown in Figs. 1 and 2, a pair of roll-over preventing members 126 in the width direction are detachably provided to the rear wheel side frame 121 to prevent the electric mobile device 1 from overturning toward the rear of the vehicle. Figure 1 Figure 2 Further, as shown in Figs. 1 and 2, a pair of roll-over preventing members 126 in the width direction are detachably provided to the rear wheel side frame 121 to prevent the electric mobile device 1 from overturning toward the rear of the vehicle.

[0043] The seat unit 40 has a seat surface portion 41 on which a rider sits and a backrest portion 42.

[0044] The center shaft 171 is rotatably attached to the front end side of the front wheel side frame 111, and the handle shaft 181 is attached to the upper end of the center shaft 171 so as to be swingable in the front-rear direction. The handle shaft 181 can be fixed at the upper swing position shown in Fig. 1 by an angle adjustment mechanism of a handle not shown, and can also be swung to the lower swing position shown in Fig. 2. A handle 180 is fixed to the upper end of the handle shaft 181, and the handle has first and second operation portions 180a and 180b which are levers, buttons, or the like, respectively. The rider can displace the operation portions 180a and 180b toward the rear of the vehicle. Figures 1-3 Figure 24 The handle shaft 181 is rotatably attached to the front end side of the front wheel side frame 111, and the handle shaft 181 is attached to the upper end of the center shaft 171 so as to be swingable in the front-rear direction. The handle shaft 181 can be fixed at the upper swing position shown in Fig. 1 by an angle adjustment mechanism of a handle not shown, and can also be swung to the lower swing position shown in Fig. 2. A handle 180 is fixed to the upper end of the handle shaft 181, and the handle has first and second operation portions 180a and 180b which are levers, buttons, or the like, respectively. The rider can displace the operation portions 180a and 180b toward the rear of the vehicle.

[0045] Further, as shown in Figs. 1 and 2, a pair of roll-over preventing members 126 in the width direction are detachably provided to the rear wheel side frame 121 to prevent the electric mobile device 1 from overturning toward the rear of the vehicle. Figure 1 Figure 24 Further, as shown in Figs. 1 and 2, a pair of roll-over preventing members 126 in the width direction are detachably provided to the rear wheel side frame 121 to prevent the electric mobile device 1 from overturning toward the rear of the vehicle.

[0046] The user uses the roll-over preventing members 126 as fulcrums while lifting the electric mobile device 1 as shown in Fig. 3, and then places the electric mobile device 1 on the ground as shown in Fig. 4. Figure 24 ​​​​As shown, the device is laid back so that both ends of the width extension 197b are grounded. The anti-tipping member 126 and the width extension 197b allow the electric mobile device 1 to stand upright. This configuration is useful for reducing the storage space required for the electric mobile device 1. Furthermore, the user can put the electric mobile device 1 into its storage state without folding or other similar operations.

[0047] When the handle shaft 181 is not in the rotational position for turning in place (described later), if the operating unit 180a is operated, the control device 80 (described later) rotates a pair of rear wheels 20 in the forward direction via two motors 50. Furthermore, when the handle shaft 181 is not in the rotational position for turning in place, if the operating unit 180b is operated, the control device 80 rotates a pair of rear wheels 20 in the backward direction via two motors 50. When the handle shaft 181 is in the rotational position for turning in place, if the operating unit 180a or operating unit 180b is operated, the control device 80 (described later) rotates a pair of rear wheels 20 in opposite directions via two motors 50.

[0048] If the steering angle of the front wheel 10 is set to approximately 90° by the handle 180, and the pair of motors 50 are rotated in opposite directions, the electric mobile device 1 will turn, for example, with the middle position or center of the pair of rear wheels 20 in the width direction as the center. In this embodiment, this turning is referred to as turning in place.

[0049] Alternatively, instead of the passenger operating handle 180, operating unit 180a, operating unit 180b, etc., the control device 80 can drive the electric mobile device 1 through automatic driving based on a program.

[0050] Signals corresponding to the displacement of the operating units 180a and 180b are sent to the control unit 60 (described later), and each motor 50 is driven according to the signals.

[0051] like Figure 23 As shown, the control unit 60 has a motor driver 70 that drives each motor 50 and a control device 80.

[0052] The control device 80 includes, for example, a processor 81 having a CPU, RAM, etc.; a storage device 82 having non-volatile memory, ROM, etc.; and a transceiver unit 83. The storage device 82 stores a program for controlling the electric mobile device 1, and the processor 81 operates based on the program, sending drive signals for driving each motor 50 to the motor driver 70.

[0053] In this embodiment, the front wheel side body 110 and the rear wheel side body 120 are detachably connected, but the front wheel side body 110 and the rear wheel side body 120 can also be integrated.

[0054] Each of the rear wheels 20 is attached to the rear wheel side vehicle body 120 by means of a rear wheel suspension. As shown in Figure 7

[0055] The base end side of the swing base 131 is attached to the rear wheel side frame 121 of the rear wheel side vehicle body 120 so as to be swingable in the up-and-down direction, and if the swing base 131 swings, the top end of the swing base 131 moves in the up-and-down direction. The base end side of the swing base 131 is disposed on the central side in the width direction of the lower surface of the rear wheel side frame 121, and the top end of the swing base 131 is disposed on the outer side in the width direction than the rear wheel side frame 121. In the present embodiment, the base end, base end portion, and base end side of the swing portion 2 are the base end, base end portion, and base end side of the swing base 131, and the top end, top end portion, and top end side of the swing portion 2 are the top end, top end portion, and top end side of the swing base 131.

[0056] More specifically, a pair of shaft support portions are provided on the lower surface of the rear wheel side frame 121, and a through hole extending in the front-and-rear direction is provided in each of the shaft support portions. On the other hand, as shown in Figure 4

[0057] A shaft support member such as a slide bearing is provided between the shaft 150 and the shaft support portion.

[0058] With the above structure, the swing base 131 swings about a swing axis 150a (see FIG. 2) that is the central axis of the shaft 150. Figure 4 Figure 7

[0059] In addition, the shaft support portion can be provided on the base end side of the swing base 131, and the shaft 150 can be fixed to the lower surface of the rear wheel side frame 121.

[0060] As shown in Figure 6 Figure 7 ​​​​​As shown, a rear wheel support member 132 is provided at the top end of the swing base 131. The rear wheel support member 132 is a member provided at the top end of the swing base 131. Furthermore, in this embodiment, the swing base 131 and the rear wheel support member 132 are integrally formed by stamping (bending, cutting, etc.), welding, etc., of steel plates. When the rear wheel support member 132 is fixed to the swing base 131, the rear wheel support member 132 is a part of the swing base 131. Figure 6 and Figure 7 As shown, the rear wheel support member 132 extends upward from the top of the swing base 131. In this embodiment, the housing of the motor 50 is fixed to the rear wheel support member 132 by a plurality of bolts.

[0061] The hub 22 of the rear wheel 20 is fixed to the output shaft 51 of the motor 50. Thus, the motor 50 and the rear wheel 20 are supported on the top of the swing base 131.

[0062] That is, the rear wheel support member 132 supports the rear wheel 20 on the swing base 131 by means of the motor 50. Alternatively, bearings and other mechanical elements, axles, and other components may be fixed on the rear wheel support member 132, and the rear wheel support member 132 supports the rear wheel 20 by means of other mechanical elements, axles, and other components.

[0063] Alternatively, the housing of the motor 50 may be fixed to the top or middle part of the swing base 131. In this case, even without the rear wheel support member 132, the rear wheel 20 is supported on the swing base 131 by means of the motor 50. Furthermore, bearings or other mechanical elements, axles, or other components may be fixed to the top of the swing base 131, and the top of the swing base 131 may support the rear wheel 20 by means of these other mechanical elements, axles, or other components.

[0064] In any of the above cases, the rear wheel 20 is disposed on the top side of the swing base 131 and is supported on the swing base 131 in such a way that it moves together with the top side of the swing base 131 in the vertical direction.

[0065] like Figure 7 As shown, stop portions 128a and 128b are provided on the rear wheel side frame 121 and / or the swing base 131. If the top part of the swing base 131 moves downward, the base end of the swing base 131 abuts against the rear wheel side frame 121 from below by means of the stop portion 128a. This position becomes the lower limit swing position of the swing base 131.

[0066] On the other hand, if the top end of the swing base 131 moves upward, the base end of the swing base 131 abuts against the rear wheel side frame 121 from below by means of the stop 128b. This position becomes the upper limit swing position of the swing base 131.

[0067] Furthermore, even if the top of the swing base 131 swings downwards, there may be a situation where the base of the swing base 131 does not abut against the rear wheel side frame 121, etc., and the downward or upward swing of the swing base 131 is stopped by the force from the spring 140. In this case, the position where the downward or upward swing of the swing base 131 stops due to the support of the spring 140 is called the lower swing position or the upper swing position.

[0068] The distance in the width direction between the outer ends of one rear wheel 20 and the outer ends of the other rear wheel 20 is also known as the rear wheel width W1. Figure 7 One example is 450–650 mm. In this embodiment, the rear wheel width W1 is 530–550 mm. The distance in the width direction between the swing axes 150a of one side and the swing axes 150a of the other side is also known as the support shaft width W2. Figure 7 One example is 50-200mm. In this embodiment, the support shaft width W2 is 120-130mm or less.

[0069] Furthermore, in this embodiment, the distance from the swing axis 150a to the outer end of the rear wheel 20 is approximately 210 mm. If the swing base 131 swings from the upper swing position to the lower swing position, the rear wheel 20 moves more than 25 mm in the vertical direction. To improve passenger comfort, it is preferable that the rear wheel 20 moves more than 15 mm in the vertical direction relative to the vehicle frame, more preferably more than 20 mm, but it is not limited to these values, as long as the necessary suspension function is achieved.

[0070] like Figure 6 As shown, one end of the spring 140 is mounted to the top end of the swing base 131. In this embodiment, one end of the spring 140 is mounted to the top end of the swing base 131 via the rear wheel support member 132. Alternatively, one end of the spring 140 may also be mounted to other parts of the swing base 131.

[0071] On the other hand, the other end of the spring 140 is mounted on the rear wheel side frame 121.

[0072] In this embodiment, the angle between the extending direction of the spring 140 and the horizontal width line is less than 20°. In one example, the horizontal width line is parallel to a straight line passing through the center point of the axle of one rear wheel 20 and the center point of the axle of the other rear wheel 20. In another example, the horizontal width line is parallel to a straight line passing through the radial center point of the axle of one front wheel 10 and the center point of the axle of the other front wheel 10.

[0073] In one example, the direction of extension of the spring 140 is a straight line passing through the radial center of one end of the spring 140 and the radial center of the other end.

[0074] For example, the angle is set within a range of 5° to 20°. If the angle is 50° or less, there is a possibility of functioning the same as in the case where the angle is 20°.

[0075] Further, it is preferable to employ a known non-linear spring as the spring 140. In one example of the non-linear spring, the pitch of the coil wire is different on the one end side and the other end side, whereby the spring stiffness at the time of compression is higher than at the time of initial compression. Other kinds of non-linear springs can also be used.

[0076] Thus, in the present embodiment, the spring 140 extends in the vehicle width direction and extends obliquely downward from the inner side to the outer side in the vehicle width direction.

[0077] When a force from below is applied to each of the rear wheels 20 and each of the rear wheels 20 moves upward with respect to the rear wheel side frame 121, each of the springs 140 is compressed. At this time, since the spring 140 is disposed as described above, the ratio of the horizontal force component with respect to the vertical force component in the force applied to the rear wheel side frame 121 from the other end of each of the springs 140 becomes large. That is, the vertical force is difficult to be transmitted from each of the springs 140 to the rear wheel side frame 121. Further, a damper can be further provided in parallel with the spring 140. In one example, a known damper such as an oil damper can be disposed within the spring 140. In another example, instead of the spring (force applying member) 140, another force applying member such as an air cylinder can be provided. In this case, a force applying system having an air cylinder capable of supplying air to the base end side and the top end side of the cylinder portion, a pump that supplies air to the cylinder portion, an electronic control valve provided on the base end side and the top end side of the cylinder portion, respectively, and a control device can be configured. By controlling the pump and the electronic control valve by the control device, appropriate suspension function corresponding to the weight of the rider can be achieved. The force applying member is a member that can apply a force toward the lower side to the swing portion 2 when the swing portion 2 moves upward on the top end side.

[0078] The electrically driven mobile device 1 has requirements such as being small, light, simple in structure, and durable. Therefore, the space in which the suspension, the spring, the damper, and the like can be disposed is small, and it is difficult to increase the suspension, the spring, the damper, and the like. The above-described structure is useful for effectively buffering the force from below applied to the rear wheel 20 in the limited space.

[0079] Further, the force from below is a force received by the rear wheel 20 from the ground surface when the rider rides on the seat unit 40, a force received by the rear wheel 20 from the unevenness of the ground when the electrically driven mobile device 1 travels, and the like.

[0080] Further, in the present embodiment, the swing base 131 of the swing portion 2 extends from the swing axis 150a to the outside in the vehicle width direction and extends substantially toward the horizontal direction from the swing axis 150a. In the present embodiment, when the angle that the extending direction of the swing base 131 or the swing portion 2 makes with the horizontal direction is 35° or less, it can be said that the swing base 131 extends substantially toward the horizontal direction from the swing axis 150a. The angle is preferably 25° or less, more preferably 10° or less, and further preferably 5° or less.

[0081] Further, in one example, the extending direction of the swing base 131 (swing portion 2) is the direction that passes the center of the cross section of the base end portion of the swing base 131 and the center of the cross section of the top end portion of the swing base 131. The cross section is a cross section obtained by cutting with a plane that extends in the vehicle front-rear direction and the vertical direction. In another example, the extending direction of the swing base 131 is the direction in which the lower surface or the upper surface of the swing base 131 substantially extends.

[0082] In the present embodiment, in a state in which the occupant is not seated on the seat unit 40, the swing base 131 extends from the swing axis 150a toward a direction slightly downward from the horizontal direction. Also, if the occupant is seated on the seat unit 40, the swing base 131 swings upward against the reaction force of the spring 140, and the swing base 131 becomes a state in which it extends from the swing axis 150a toward a direction slightly upward from the horizontal direction. In the case of a lighter occupant, the swing base 131 becomes a state in which it extends from the swing axis 150a toward the horizontal direction or a state in which it extends toward a direction slightly downward from the horizontal direction.

[0083] In this state, one end of the spring 140 is attached to the top end portion of the swing base 131 by the rear wheel support member 132, and the spring 140 extends toward the vehicle width direction as described above. Therefore, as the swing position of the swing base 131 approaches the upper limit swing position, the compression amount of the spring 140 per unit swing amount of the swing base 131 becomes large. With this structure, the compression amount of the spring 140 per unit swing amount of the swing base 131 becomes small when a lighter occupant is seated compared to when a heavier occupant is seated.

[0084] Further, the spring 140 can also be a non-linear spring in which the spring rate becomes high when compressed. In one example, the spring 140 is a non-linear spring in which the spring rate after the increase becomes 1.3 times or more, and preferably 1.5 times or more, with respect to the spring rate before the increase.

[0085] That is, the spring rate of the entire rear wheel suspension changes depending on the weight of the rider. In addition, the effect of the spring rate of the entire rear wheel suspension changing depending on the weight of the rider is obtained simply by making the spring 140 a non-linear spring.

[0086] Thus, since the spring rate of the entire rear wheel suspension changes depending on the weight of the rider, excessive swinging of the swing base 131 when a heavier rider is riding is prevented. This structure of the spring rate corresponding to the weight achieves a damping effect while also relating to protection of each frame of the mobile device main body 30. Furthermore, a greater force is applied to the spring 140 of one of the pair of rear wheels 20 when the electric mobile device 1 is turning or cornering. Here, the spring rate of the spring 140 becomes higher when a greater force is applied. For example, when a lighter rider is riding and the electric mobile device 1 is stationary or straight, the spring rate is before becoming higher, whereas the spring rate of the rear wheel suspension on the outside becomes higher when the electric mobile device 1 is turning or cornering. Therefore, the roll angle when turning or cornering is suppressed, and the posture of the electric mobile device 1 and the rider is stabilized.

[0087] Further, in the present embodiment, the swing control portion 3 is provided, which suppresses or limits the movement of the base end sides of the pair of swing portions 2 in the up-down direction from each other, thereby suppressing or limiting the case where the tip end side of one of the pair of swing portions 2 is higher than the tip end side of the other swing portion 2 within a predetermined range.

[0088] As shown in Figs. 1, 2, and 3, the swing control portion 3 of the present embodiment has a first member 310 and a second member 320 made of metal, hard plastic, or the like. More preferably, the first member 310 and the second member 320 are formed using a spring material such as stainless steel or spring steel used in the manufacture of coil springs and the like. Figure 9 The first member 310 has a main body 310a fixed to the base end portion of one (right side) of the pair of swing bases 131 by a bolt or the like, and the second member 320 has a main body 320a fixed to the base end portion of the other (left side) of the pair of swing bases 131 by a bolt or the like.

[0089] The first member 310 has a plurality of upper side contact portions 311 arranged apart from each other in the vehicle front-rear direction, and a plurality of lower side contact portions 312 arranged apart from each other in the vehicle front-rear direction.

[0090] In the present embodiment, each contact portion 311, 312 extends from the main body 310a toward the inner side in the vehicle width direction, and each contact portion 311, 312 is fixed to the main body 310a. Alternatively, each contact portion 311, 312 is formed integrally with the main body 310a. As shown in Figs. 1, 2, and 3, the swing control portion 3 of the present embodiment has a first member 310 and a second member 320 made of metal, hard plastic, or the like. More preferably, the first member 310 and the second member 320 are formed using a spring material such as stainless steel or spring steel used in the manufacture of coil springs and the like.

[0091] Figure 8 ​Figure 9 As shown in FIG. 1, the plurality of upper contact portions 311 and the plurality of lower contact portions 312 are staggered in the vehicle front-rear direction. The plurality of upper contact portions 311 are arranged more upward than the plurality of lower contact portions 312.

[0092] Further, the second member 320 has a plurality of upper contact portions 321 arranged at intervals in the vehicle front-rear direction, and a plurality of lower contact portions 322 arranged at intervals in the vehicle front-rear direction.

[0093] Further, each contact portion 321, 322 extends from the main body 320a toward the inner side in the vehicle width direction, and is fixed to the main body 320a. Alternatively, each contact portion 321, 322 is formed integrally with the main body 320a. As shown in FIG. 1, each contact portion 321, 322 is formed in a substantially rectangular shape. Figure 8 Figure 9 As shown in FIG. 1, the plurality of upper contact portions 321 and the plurality of lower contact portions 322 are staggered in the vehicle front-rear direction. The plurality of upper contact portions 321 are arranged more upward than the plurality of lower contact portions 322.

[0094] The first member 310 and the second member 320 are fixed to the pair of swing bases 131 (swing portions 2) in a manner that the plurality of upper contact portions 311 of the first member 310 and the plurality of lower contact portions 322 of the second member 320 are arranged in the up-down direction, and the plurality of lower contact portions 312 of the first member 310 and the plurality of upper contact portions 321 of the second member 320 are arranged in the up-down direction. Figure 9 When the left and right rear wheels 20 moving in the up-down direction as described above are arranged at the same height position with respect to the vehicle body frame, that is, the top end side of the pair of swing bases 131 (swing portions 2) is arranged at the same height position with respect to the vehicle body frame, the first member 310 and the second member 320 are not in contact, or the first member 310 and the second member 320 are in slight contact in a state that they do not engage with each other in the up-down direction. The top end side of the swing base 131 (swing portion 2) is, for example, a specific portion of the top end of the swing base 131.

[0095] Here, the height position can be measured with respect to a reference plane (reference height position) based on a reference element, a reference shape, a reference position, or the like of the rear wheel side vehicle body 120. The reference element is, for example, a part or all of the lower surface of the rear wheel side frame 121, the pair of roll-over prevention members 126, the center axis of the pair of roll-over prevention members 126, or the like in the vehicle body frame. The reference shape is, for example, a single or a plurality of shapes having a feature in the rear wheel side frame 121. The reference position is, for example, the height position of the specific portion of the rear wheel 20 or the swing base 131 with respect to the vehicle body frame measured in the electric mobile apparatus 1 at rest without load.

[0096] ​​For example, in the case of a reference element, a reference plane (reference height position) can be set with reference to a single or a plurality of grooves, protrusions, flat surfaces, or the like extending horizontally in the vehicle width direction on the lower surface of the rear wheel side frame 121, or holes, grooves, protrusions, flat surfaces, or the like arranged in the vehicle width direction on the lower surface of the rear wheel side frame 121. The case of the reference shape and the reference position can also be similarly set.

[0097] When the electrically driven mobile device 1 turns or turns around, a centrifugal force acts on the electrically driven mobile device 1, and a greater load is applied to the rear wheel 20 on the outer side of the turn or the turn around in the pair of rear wheels 20. In this case, as indicated by an arrow, the electrically driven mobile device 1 can exhibit a tilting behavior toward the outer side of the turn or the turn around. This behavior is sometimes referred to as rolling. This tilting behavior can also occur when a rider applies a body weight to one side in the vehicle width direction. For example, a rider who is riding on the electrically driven mobile device 1 that is stopped can apply a body weight to one side in the vehicle width direction in order to take an article placed on the side of the electrically driven mobile device 1. Figure 3

[0098] In addition, this tilting behavior can occur when a rider stands on a footrest by applying a body weight to one side in the vehicle width direction.

[0099] In the case where a soft rear wheel suspension is used in order to improve the comfort of a rider as described above, this tilting behavior is likely to occur.

[0100] This tilting behavior can also be said to be a behavior in the direction of rotation around an axis extending in the vehicle front-rear direction.

[0101] In the present embodiment, with this tilting behavior, the height position of the tip end side of one of the pair of swing portions 2 is higher than the height position of the tip end side of the other swing portion 2. For example, when the difference between the two height positions becomes a predetermined difference, that is, 10 mm, the plurality of upper contact portions 311 and the plurality of lower contact portions 322 come into contact in the up-down direction. At this time, in the present embodiment, the plurality of lower contact portions 312 of the first member 310 and the plurality of upper contact portions 321 of the second member 320 also come into contact in the up-down direction. With this contact, the up-down direction movement of the first member 310 and the second member 320 relative to each other is restricted. That is, the difference between the height position of the tip end side of one of the pair of swing portions 2 and the height position of the tip end side of the other swing portion 2 is suppressed or restricted from becoming larger than the predetermined difference. More specifically, the difference between the height position of the tip end side of one of the pair of swing portions 2 and the height position of the tip end side of the other swing portion 2 is restricted to within a range of 10 mm as the predetermined range.

[0102] ​The predetermined range can be appropriately set. Although the specific value varies depending on the size of the electrically movable apparatus 1 and the like, for example, if the predetermined range is set to a relatively small range of 2 to 10 mm, the electrically movable apparatus 1 is less likely to roll. If the predetermined range is set to a relatively large range exceeding 10 mm, the degree of freedom of the action of tilting the electrically movable apparatus 1 at the time of turning is increased.

[0103] With this structure, it is possible to reduce the tilting action while achieving the soft rear wheel suspension for improving the comfort of the rider as described above. This also contributes to improving the running performance of the electrically movable apparatus 1 and further improving the comfort of the rider.

[0104] In addition, in the case where the first member 310 and the second member 320 are formed using a spring material as described above, a structure can be employed in which the upper side contact portion 311 and / or the lower side contact portion 322 is deformable within a range of elastic deformation in accordance with a force applied to the contact portion in the vertical direction when the upper side contact portion 311 and the lower side contact portion 322 are in contact in the vertical direction. In this case, for example, a force of 500 N, 1000 N, or the like is applied to the contact portion in the vertical direction, and in response to this, the tip of the upper side contact portion 311 and / or the tip of the lower side contact portion 322 is displaced by 0.3 mm or more, 0.5 mm or more, or 1 mm or more in the vertical direction. With this structure, the displacement of the swing portion 2 becomes soft, and it is expected that the members 310, 320 become less likely to be fragile (become less likely to be permanently deformed).

[0105] In addition, a single upper side contact portion 311 and a single lower side contact portion 312 can be provided in the first member 310, and a single upper side contact portion 321 and a single lower side contact portion 322 can be provided in the second member 320. The same effects as described above can be achieved in this case as well.

[0106] Furthermore, for example, the second member 320 can be omitted, and only the first member 310 can achieve the effects described above. In this case, a portion of the base end portion of the other swing base 131 is disposed below the plurality of upper side contact portions 311 of the first member 310 fixed to the base end portion of the one swing base 131. Furthermore, a portion of the base end portion of the other swing base 131 is disposed above the plurality of lower side contact portions 312 of the first member 310. If the portion of the base end portion functions as the second member 320, the effects described above can be achieved.

[0107] The first component 310 and the second component 320 may be part or all of the base end of the swing base 131. For example, the upper contact portion 311 and the lower contact portion 312 may be integrally provided on the base end side of one swing base 131, and the upper contact portion 321 and the lower contact portion 322 may be integrally provided on the base end side of the other swing base 131.

[0108] Alternatively, a hole or cutout may be formed on the base end side of one of the swing bases 131, and a protrusion for inserting into the hole or cutout may be formed on the base end side of the other swing base 131. The upper end face of the hole or cutout functions as an upper contact portion that contacts the protrusion from above, and the lower end face of the hole or cutout functions as a lower contact portion that contacts the protrusion from below.

[0109] As mentioned above, in order to limit the swinging of one of the base ends of a pair of swinging parts 2 in different directions relative to the other in the up and down direction, it is sufficient to provide an upper contact portion that contacts the base end of the other swinging part 2 from the top and a lower contact portion that contacts the base end of the other swinging part 2 from the bottom on the base end side of at least one swinging part 2.

[0110] Alternatively, the aforementioned swing control unit 3 of this embodiment can be replaced by... Figure 10 and Figure 11 The swing control unit 4 is shown.

[0111] The swing control unit 4 has a connecting member 400. The first fixing part 410 of the connecting member 400 is fixed to the base end side of one of the pair of swing bases 131 by bolts or the like, and the second fixing part 420 is fixed to the base end side of the other of the pair of swing bases 131 by bolts or the like. In addition to the connecting member 400, the swing control unit 4 may sometimes have other components.

[0112] The connecting member 400 has a force-generating part 430 made of metal, rigid plastic, or the like that connects the first fixing part 410 and the second fixing part 420. The force-generating part 430 has an elastically deformable shape. One end of the force-generating part 430 is a connecting part that connects to the first fixing part 410, and the other end of the force-generating part 430 is a connecting part that connects to the second fixing part 420.

[0113] like Figure 10 As shown, one example of an elastically deformable shape is one that is configured within a range of 170° or more around an axis 431 extending in the vehicle's longitudinal direction. The axis 431 is configured within the area surrounded by the force-generating part 430 and extends in the vehicle's longitudinal direction. Therefore, an elastically deformable shape is generally configured within a range of 180° or more around the axis 431.

[0114] As the cross-sectional shape of the force generating portion 430, various shapes such as a shape constituted by a single circular arc, a shape in which a plurality of circular arcs are connected, a shape in which a single or a plurality of circular arcs are connected to a single or a plurality of straight lines, a shape in which a part of the sides of a polygon is removed, and the like can be adopted. The cross-sectional shape is the shape of a cross section obtained by cutting with a plane perpendicular to the vehicle front-rear direction. A part or all of the circular arcs can also be circular arcs having a center of curvature outside the force generating portion 430. Figure 10 The force generating portion 430 of the swing control portion 4 has a cross-sectional shape in which a plurality of circular arcs are connected. Further, the force generating portion 440 of the swing control portion 4' of the modification example has a cross-sectional shape in which a plurality of circular arcs having a center of curvature outside the force generating portion 440 are connected. Figure 12 The force generating portion 440 of the swing control portion 4' has a cross-sectional shape in which a plurality of circular arcs having a center of curvature outside the force generating portion 440 are connected.

[0115] Since the force generating portions 430, 440 have the above-described structure, when the same-direction swing in which the pair of swing bases 131 swing upward or downward together on the base end side, the first deformation in which one end and the other end of the force generating portions 430, 440 displace in the horizontal direction from each other occurs. Thus, when the pair of swing bases 131 swing in the same direction, the force generating portions 430, 440 having the above-described shape apply a relatively small reaction force to the base end side of the pair of swing bases 131.

[0116] On the other hand, when the opposite-direction swing in which one of the pair of swing bases 131 swings upward or downward with respect to the base end side of the other, the second deformation in which one end and the other end of the force generating portions 430, 440 displace in the vertical direction from each other occurs. Thus, the force generating portions 430, 440 deform in a different mode from that at the time of the same-direction swing. The ratio of the force from the force generating portions 430, 440 at the time of the opposite-direction swing to the amount of deformation of the second deformation (second spring constant; second ratio) is 3 times or more, and more preferably 5 times or more, with respect to the ratio of the force from the force generating portions 430, 440 at the time of the same-direction swing to the amount of deformation of the first deformation (first spring constant; first ratio) in the present embodiment. The ratio can be 1.5 times or more. The ratio of the second spring constant to the first spring constant is not limited to this value, and can be any value as long as the tilting behavior can be reduced as described above. The same applies to the following description.

[0117] Therefore, the swing control portions 4, 4' suppress the different-direction swing of one of the pair of swing portions 2 relative to the other in different directions in the up-down direction. This configuration can suppress or limit the difference between the height position of the tip end side of one of the pair of swing portions 2 relative to the vehicle body frame and the height position of the tip end side of the other relative to the vehicle body frame from becoming larger than the predetermined range. In the case of suppression, the force generating portions 430, 440 generate a sufficiently large force before the difference exceeds the predetermined range, thereby making it difficult for the difference to exceed the predetermined range. The same applies to the other force generating portions.

[0118] The shape of the force generating portion 430 of the aforementioned swing control portion 4 of the present embodiment can also be changed to the shape of the force generating portion 430' of the swing control portion 4' shown in FIG. 6. Figure 13 The swing control portion 4" shown in FIG. 7 can also be used instead of the aforementioned swing control portion 3 of the present embodiment.

[0119] The swing control portion 4" also has the force generating portion 430" with an elastically deformable shape. The force generating portion 430" also has a shape configured in a range of 170° or more around the axis 431 and has a cross-sectional shape in which a plurality of circular arcs are connected.

[0120] The swing control portion 5 shown in FIG. 8 can also be used instead of the aforementioned swing control portion 3 of the present embodiment. Figure 14 The swing control portion 5 shown in FIG. 8 can also be used instead of the aforementioned swing control portion 3 of the present embodiment.

[0121] The swing control portion 5 has a connection member 500, a first fixing portion 510 of which is fixed to the base end side of one of the pair of swing bases 131 by a bolt or the like, and a second fixing portion 520 of which is fixed to the base end side of the other of the pair of swing bases 131 by a bolt or the like. The swing control portion 5 sometimes has other members in addition to the connection member 500.

[0122] The connection member 500 has a force generating portion 530 composed of a wire-like member, a string-like member, a tape-like member, or the like that connects the first fixing portion 510 and the second fixing portion 520. The force generating portion 530 of the present embodiment is formed by winding a wire composed of polyester fiber, nylon fiber, aramid fiber, or the like around the first fixing portion 510 and the second fixing portion 520 multiple times. The wire-like member and the string-like member can be made of chemical fibers such as polyester fiber, nylon fiber, aramid fiber, and natural fibers, metal fibers, or the like. The tape-like member can be made of metal, plastic, rubber, or the like. The force generating portion 530 of the present embodiment can also have a rubber-like elasticity that covers the force generating portion 530.

[0123] Because the connecting member 500 has the above-described structure, during the oscillation in the same direction, a first deformation occurs in the force generating part 530, causing the first fixing part 510 side and the second fixing part 520 side of the force generating part 530 to displace each other in the horizontal direction. The length of the force generating part 530 between the first fixing part 510 and the second fixing part 520 is set so that no strong tension is generated during this deformation.

[0124] On the other hand, during the opposite-direction oscillation, a second displacement is generated in the force generating section 530, causing the first fixed section 510 side and the second fixed section 520 side of the force generating section 530 to move relative to each other in the vertical direction. The ratio of the force (tension) from the force generating section 530 during the opposite-direction oscillation to the amount of deformation of the second deformation (second spring constant; second ratio) relative to the ratio of the force (tension) from the force generating section 530 during the same-direction oscillation to the amount of deformation of the first deformation (first spring constant; first ratio) in this embodiment is at least 3 times, more preferably at least 5 times. This ratio only needs to be at least 1.5 times. This ratio is not limited to these values, as mentioned above. Furthermore, the amount of deformation can also be described as the amount of displacement (change in distance) of the first fixed section 510 relative to the second fixed section 520.

[0125] Therefore, the swing control unit 5 suppresses or limits the directional swing of one of the base ends of the pair of swing parts 2 relative to the other in a direction different from the vertical direction. This structure suppresses or limits the difference between the height position of the top end of one of the pair of swing parts 2 relative to the vehicle frame and the height position of the top end of the other of the pair of swing parts 2 relative to the vehicle frame from becoming larger than the predetermined difference.

[0126] It can also be in Figure 15 The swing base 131' is equipped with a swing control unit 6. Figure 15 In this drawing, structural parts that are equivalent to those in the above-described embodiments are labeled with the same reference numerals. Figure 15 In the middle, the shaft 150 on the base end side of the swing base 131' fixed on the right is arranged further to the left than the shaft 150 on the base end side of the swing base 131' fixed on the left.

[0127] The swing control unit 6 has a connecting member 600 that connects the base end side of the right swing base 131' and the base end side of the left swing base 131'. In addition to the connecting member 600, the swing control unit 6 may sometimes have other members.

[0128] The connecting member 600 can also be described as a force-generating part composed of a linear member, rope member, or strip member that connects the base end of the right swing base 131' and the left swing base 131'. This force-generating part can be made of the same material as the force-generating part 530.

[0129] Because the connecting member 600 has the above-described structure, the change in distance (first deformation) between the two ends of the force-generating part in the vertical direction is small when it swings in the same direction. The length of the force-generating part is set so that it does not generate strong tension at this time.

[0130] On the other hand, during the opposite-direction oscillation, the distance between the two ends of the force-generating part in the vertical direction changes significantly (second deformation). The ratio of the force (tension) from the force-generating part during the opposite-direction oscillation to the amount of deformation in the second deformation (second spring constant; second ratio) relative to the ratio of the force (tension) from the force-generating part during the same-direction oscillation to the amount of deformation in the first deformation (first spring constant; first ratio) in this embodiment is at least 3 times, more preferably at least 5 times. This ratio only needs to be at least 1.5 times. This ratio is not limited to these values, as mentioned above. Furthermore, this deformation amount can also be described as the displacement (change in distance) of the upper end of the force-generating part relative to its lower end.

[0131] Therefore, the swing control unit 6 suppresses or limits the directional swing of one of the base ends of the pair of swing units 2 relative to the other in a direction different from the vertical direction. This structure suppresses or limits the difference between the height position of the top end of one of the pair of swing units 2 relative to the vehicle frame and the height position of the top end of the other of the pair of swing units 2 relative to the vehicle frame from becoming larger than the predetermined difference.

[0132] It can also be in Figure 16 The swing base 131” is equipped with a swing control unit 7. Figure 16 In this drawing, structural parts that are equivalent to those in the above-described embodiments are labeled with the same reference numerals. Figure 16 In the middle, the shaft 150 fixed to the base end side of the right-side swing base 131” and the shaft 150 fixed to the base end side of the left-side swing base 131” are separated by a predetermined distance in the vehicle width direction. Figure 16 In the first case, the rear wheel support member 132 is fixed to the swing base 131. However, similar to a double wishbone suspension, the lower end of the rear wheel support member 132 can be connected to the swing base 131 in a way that allows it to swing in the vehicle width direction. In this case, the upper end of the rear wheel support member 132 can be connected to an upper swing base (not shown) in a way that allows it to swing in the vehicle width direction, as needed. In this case, the motor 50 can also be fixed to the rear wheel side frame 121, and the output shaft of the motor 50 can be connected to the rear wheel 20 via a shaft, universal joint, etc.

[0133] The swing control section 7 has a connection member 700, a first fixing section 710 of which is fixed to the base end side of one of the pair of swing bases 131" by a bolt or the like, and a second fixing section 720 of which is fixed to the base end side of the other of the pair of swing bases 131" by a bolt or the like. The swing control section 7 has, in addition to the connection member 700, other members at times. As an example, the fixing sections 710, 720 are each a pulley fixed to the swing base 131" coaxially with the swing axis 150a. The connection member 700 also functions as a force generating section.

[0134] The connection member 700 has force generating sections 731, 732 composed of a wire-like member, a string-like member, a belt-like member, or the like connecting the first fixing section 710 and the second fixing section 720. The force generating sections 731, 732 of the present embodiment are belt-like members that can be produced similarly to the force generating section 530. One end of the force generating section 731 is fixed to the upper end section of the fixing section 710, and the other end of the force generating section 731 is fixed to the lower end section of the fixing section 720. One end of the force generating section 732 is fixed to the lower end section of the fixing section 710, and the other end of the force generating section 732 is fixed to the upper end section of the fixing section 720.

[0135] Since the connection member 700 has the above-described structure, in the same direction swing, the first fixing section 710 and the second fixing section 720 rotate in different directions from each other, and a first deformation occurs in the force generating sections 731, 732 according to the rotation. The length of the force generating sections 731, 732 between the first fixing section 710 and the second fixing section 720 is set so as not to generate a strong tension at the time of the deformation.

[0136] On the other hand, in the different direction swing, for example, the first fixing section 710 and the second fixing section 720 rotate in the same direction, and one of the force generating sections 731, 732 is displaced by a second displacement that is substantially longer than the first deformation by the rotation.

[0137] Therefore, the swing control section 7 suppresses or restricts the first fixing section 710 and the second fixing section 720 from rotating around the swing axis 150a with a larger force at the time of the second deformation than at the time of the first deformation. Thus, the different direction swing in which the base end side of one of the pair of swing sections 2 swings in a direction different from the up-down direction with respect to the other is suppressed or restricted. This structure suppresses or restricts the difference between the height positions of the tip end side of one of the pair of swing sections 2 with respect to the vehicle body frame and the height position of the tip end side of the other with respect to the vehicle body frame from becoming larger than the predetermined difference.

[0138] Alternatively, in the swing control unit 7, the first fixing part 710 and the second fixing part 720 may be gears such as spur gears instead of pulleys, so that the first fixing part 710 and the second fixing part 720, which are gears, mesh with each other. In this case, the first fixing part 710 and the second fixing part 720 that mesh with each other are allowed to swing in the same direction, while swinging in opposite directions is restricted.

[0139] Alternatively, one or more gears may be provided between the first fixing part 710 and the second fixing part 720. In this case, the rotation of the first fixing part 710 can be transmitted to the second fixing part 720 via one or more gears, and the configuration allows one or more gears to oscillate in the same direction while restricting oscillation in opposite directions. Alternatively, instead of one or more gears, a member such as a rod or plate extending in the vertical direction may be provided, with racks extending in the vertical direction provided at both ends of this member. In this case, if this member is mounted to the vehicle frame via a linear guide or the like in a manner that allows movement only in the vertical direction, then oscillation in the same direction is allowed while oscillation in opposite directions is restricted.

[0140] Furthermore, since each of the aforementioned sway control units controls tilting movements such as when driving or when the user stands on the footrest, it helps to stabilize the vehicle's posture, and therefore can also be called a stabilizer.

[0141] Furthermore, in the case where the swing control unit is connected to a pair of swing units 2, as in the case of the connecting member 400 of the swing control unit 4, the spring constants of the force generating units 430, 430”, and 440 when swinging in the same direction are adjusted, thus serving as an auxiliary or replacement for the spring 140. That is, the swing control unit has the function of a stabilizer and also the function of a suspension spring.

[0142] Figures 17-20 This indicates the front wheel 10 in this embodiment. For example... Figures 17-19 As shown, the hub 12 has a pair of hub components 12a and 12b, which are made of plastic, metal, or the like. The outer peripheral component 13 of the front wheel 10 is held axially by the pair of hub components 12a and 12b, and is thus fixed to the hub 12. Therefore, the pair of hub components 12a and 12b need to be securely fixed to each other. In this embodiment, the pair of hub components 12a and 12b are fixed to each other by multiple bolts 14 and multiple nuts 15 threaded connections.

[0143] In this embodiment, such as Figure 18 and as Figure 18 XX-XX line cross section diagram Figure 20As shown in FIG. 1, the hub member 12a is formed with a single or a plurality of nut accommodating portions 12c, which are accessible from the radially outer side of the hub 12. That is, the nut accommodating portions 12c are open to the radially outer side of the hub 12, and the opening portions communicate with the space 12e of the hub 12. If there is no outer peripheral member 13, the space 12e communicates with the outside of the wheel radially outward of the hub 12. Therefore, before the outer peripheral member 13 is fixed to the hub 12, the nut 15 can be accommodated in the nut accommodating portion 12c from the radially outer side of the hub 12. It is preferable that the nut 15 is slightly fitted in the nut accommodating portion 12c, because this makes the assembly work easy. Figure 19

[0144] As shown in FIG. 1, the hub member 12a is formed with a single or a plurality of nut accommodating portions 12c, which are accessible from the radially outer side of the hub 12. That is, the nut accommodating portions 12c are open to the radially outer side of the hub 12, and the opening portions communicate with the space 12e of the hub 12. If there is no outer peripheral member 13, the space 12e communicates with the outside of the wheel radially outward of the hub 12. Therefore, before the outer peripheral member 13 is fixed to the hub 12, the nut 15 can be accommodated in the nut accommodating portion 12c from the radially outer side of the hub 12. It is preferable that the nut 15 is slightly fitted in the nut accommodating portion 12c, because this makes the assembly work easy. Figure 19

[0145] The nut accommodating portions 12c, 12d of the present embodiment are disposed at positions that are not visible from the outside of the hub 12. This structure makes the appearance neat and beautiful while firmly fixing the outer peripheral member 13 to the hub 12.

[0146] A wheel having the same structure as the front wheel 10 can also be used for the rear wheel 20, and can also be used for other wheels of the electrically movable device.

[0147] Figure 21 The present embodiment is described as an example of the electrically movable device 1. However, the present embodiment can also be applied to other electrically movable devices 1. Figure 22 The present embodiment is described as an example of the electrically movable device 1. However, the present embodiment can also be applied to other electrically movable devices 1. Figure 21 As shown in FIG. 1, the hub member 12a is formed with a single or a plurality of nut accommodating portions 12c, which are accessible from the radially outer side of the hub 12. That is, the nut accommodating portions 12c are open to the radially outer side of the hub 12, and the opening portions communicate with the space 12e of the hub 12. If there is no outer peripheral member 13, the space 12e communicates with the outside of the wheel radially outward of the hub 12. Therefore, before the outer peripheral member 13 is fixed to the hub 12, the nut 15 can be accommodated in the nut accommodating portion 12c from the radially outer side of the hub 12. It is preferable that the nut 15 is slightly fitted in the nut accommodating portion 12c, because this makes the assembly work easy. Figure 21

[0148] In the case of towing, as shown in FIG. 1, the user carries the front wheel 10 of another electrically movable device 1 on the towing use member 190. Then, the user rides the front-side electrically movable device 1, and makes the front-side electrically movable device 1 travel. Thus, another electrically movable device 1 is towed. Another electrically movable device 1 can also be provided with a towing use member 190, and the front wheel 10 of yet another electrically movable device 1 can be carried on the towing use member 190. Figure 22

[0149] ​​​​The center axis of the spring 140 is disposed more to the front side of the vehicle than the rotational axis of the rear wheel 20. This structure is advantageous for reducing the size of the electric mobility device 1 in the front-rear direction.

[0150] Further, in the rear wheel side cover 120a, the mudguard 120b of the right side rear wheel 20 is preferably fixed to the right side swing portion 2. Figure 1 And Figure 5 The mudguard 120b of the left side rear wheel 20 is also the same. For example, the mudguard 120b is fixed to the rear wheel support member 132, the motor 50, or the like of the swing portion 2 using a plurality of bolts (not shown).

[0151] In this case, the mudguard 120b moves in the up-down direction together with the swing portion 2 and the rear wheel 20. Therefore, even in the case where the rear wheel 20 moves greatly in the up-down direction about the swing axis 150a, the change in the shape when the electric mobility device 1 is viewed from the rear, the side, or the like appears to be small. This structure can improve the function of the rear wheel suspension while maintaining the appearance of the electric mobility device 1, thereby improving the mood of the rider of the electric mobility device 1.

[0152] In addition, in the case where one pair or two pairs or more of the front wheels 10 are provided in the front wheel side vehicle body 110, the above-described various effects of the rear wheel suspension and the swing control portion can also be achieved similarly.

[0153] Further, in the case where other wheels are provided between the front wheels 10 and the rear wheels 20, other wheels are provided rearward of the rear wheels 20, or the like, the above-described various effects of the rear wheel suspension and the swing control portion can also be achieved similarly.

[0154] Further, the above-described various structures of the rear wheel suspension and the swing control portion can also be employed for one pair of the front wheels 10 and one pair of the other wheels, and the above-described various effects can also be achieved similarly in this case.

[0155] Further, the above-described various structures of the rear wheel suspension and the swing control portion of the present embodiment can also be applied to the electric mobility device described in International Publication No. 2021 / 132533.

[0156] Further, even in the case where the front wheel side vehicle body 110 and the rear wheel side vehicle body 120 are linked in a non-detachable manner, the above-described various effects of the rear wheel suspension and the swing control portion can be achieved. In this case, the front wheel side frame 111 and the rear wheel side frame 121 are, for example, integrated, and the vehicle body frame of the electric mobility device 1 is formed by the front wheel side frame 111 and the rear wheel side frame 121.

[0157] Moreover, in a case where the rear wheel support member 132 is not provided at the top end portion of the swing base 131, one end of the spring 140 can be fixed to other members such as a housing of the motor 50 or can be fixed to other members fixed or provided on the swing base 131. In this case, one end of the spring 140 is mounted to the top end portion of the swing base 131 via the members.

[0158] On the other hand, one end of the spring 140 can also be directly mounted to the top end portion of the swing base 131.

[0159] Even in these cases, the above-described various effects of the rear wheel suspension can be achieved.

[0160] Moreover, two (or more) seat units 40 arranged in the front-rear direction can also be installed in the electric mobility device 1. In this case, two (or more) people are seated and ride the electric mobility device 1 in a manner arranged in the front-rear direction. Even in this case, the above-described various effects of the rear wheel suspension and the swing control portion can be achieved.

[0161] Explanation of Reference Numerals

[0162] 1 Electric mobility device

[0163] 2 Swing portion

[0164] 3, 4, 4', 4", 5, 6, 7 Swing control portion

[0165] 10 Front wheel

[0166] 20 Rear wheel (wheel)

[0167] 30 Mobility device main body

[0168] 40 Seat unit

[0169] 50 Motor

[0170] 110 Front wheel side vehicle body

[0171] 111 Front wheel side frame

[0172] 120 Rear wheel side vehicle body

[0173] 121 Rear wheel side frame (vehicle body frame)

[0174] 131 Swing base

[0175] 132 Rear wheel support member

[0176] 140 Spring

[0177] BA Battery

Claims

1. An electrically powered mobile apparatus having at least a vehicle body frame and a pair of wheels, comprising: right and left swing portions, each of which is supported to the vehicle body frame so as to swing in a vertical direction about a swing axis extending in a vehicle longitudinal direction, with one end in the vehicle width direction as a base end and the other end in the vehicle width direction as a top end, each of the wheels being supported to the swing portion so as to move in the vertical direction with the top end side of the swing portion; a biasing member that applies a force toward the lower side to each of the swing portions when the top end side is moved upward; and right and left upper and lower contact portions provided to the right swing portion, which contact right and left lower and upper contact portions of the left swing portion in the vertical direction when the right swing portion swings in a different direction from the left swing portion in the vertical direction, thereby restricting the swing in the different direction, the right and left upper and lower contact portions not contacting in the vertical direction or not engaging in the vertical direction when the right swing portion swings in the same direction as the left swing portion.

2. The electrically powered mobile apparatus according to claim 1, wherein a play until the contact is provided between the right upper contact portion and the left lower contact portion and between the right lower contact portion and the left upper contact portion.

3. An electrically powered mobile apparatus having at least a vehicle body frame and a pair of wheels, comprising: a pair of swing portions, each of which is supported to the vehicle body frame so as to swing in a vertical direction about a swing axis extending in a vehicle longitudinal direction, with one end in the vehicle width direction as a base end and the other end in the vehicle width direction as a top end, each of the wheels being supported to the swing portion so as to move in the vertical direction with the top end side of the swing portion; a biasing member that applies a force toward the lower side to each of the swing portions when the top end side is moved upward; and a swing control portion that restricts or inhibits a swing in a different direction of one of the base end sides of the pair of swing portions with respect to the other in the vertical direction within a predetermined range, the swing control portion having upper and lower contact portions provided to the base end side of at least one of the pair of swing portions, the upper and lower contact portions restricting the swing in the different direction within the predetermined range by contacting the base end side of the other of the pair of swing portions from the upper and lower sides.

4. An electrically powered mobile apparatus having at least a vehicle body frame and a pair of wheels, comprising: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A pair of swing portions, when one end in a vehicle width direction of each of the swing portions is regarded as a base end and the other end in the vehicle width direction is regarded as a top end, each of the swing portions is supported to the vehicle body frame on a base end side thereof in a manner capable of swinging in a vertical direction about a swing axis extending in a vehicle front-rear direction, each of the wheels is supported to the swing portion in a manner moving in the vertical direction together with the top end side of each of the swing portions; a force applying member that applies a force toward a lower side to each of the swing portions when the top end side is moved upward; and a swing control portion that suppresses or limits, within a predetermined range, a different direction swing in which one of the base end sides of the pair of swing portions swings relative to the other base end side in a different direction in the vertical direction, the swing control portion has a connection member that connects the base end sides of the pair of swing portions to each other, the connection member has a force generating portion that generates a first deformation when a same direction swing in which the base end sides of the pair of swing portions swing together in the vertical direction, and generates a second deformation of a different pattern from the first deformation when the different direction swing, a second ratio of a force generated by the force generating portion at the time of the second deformation to a deformation amount of the second deformation is 1.5 times or more relative to a first ratio of a force generated by the force generating portion at the time of the first deformation to a deformation amount of the first deformation.

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