Standing-ride type vehicle

Abstract

To provide a standing-ride type vehicle designed such that a small turn can be made without requiring an operator to perform steering in an unstable posture, by reducing by means of a change in posture (the movement of the center of gravity) a difference in turning radius between front and rear wheels (a difference between inner and outer wheels) when turning is taking place.SOLUTION: A standing-ride type vehicle 10 includes: a front wheel portion 20 having one front wheel 21 configured as a steering wheel, and a riding portion 23A on which an occupant rides; a rear wheel portion 30 having two rear wheels 32, and a rear-wheel support portion 31 rotatably supporting the two rear wheels 32; and a joint portion 40 connecting the riding portion 23A and the rear-wheel support portion 31. The joint portion 40 includes a rolling-direction joint 41 having a degree of freedom in rotation about an axis substantially along a vehicle longitudinal direction, and a yawing-direction joint 42 having a degree of freedom in rotation about an axis substantially along a vehicle vertical direction, in this order from a vehicle front side toward a vehicle rear side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stand-on vehicle. [Background technology]

[0002] Patent Document 1 discloses a stand-up vehicle. This vehicle includes a first member that supports the front wheels, a second member that supports the rear wheels, and a connecting part that connects the first member to the second member. The connecting part connects the first member to the second member so that the first member can swing left and right around an axis that extends in the front-rear direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2023 / 073855 Summary of the Invention [Problem to be solved by the invention]

[0004] In the stand-on vehicle, the second member is provided with a riding section (step) that supports the occupant, and therefore the connecting section is provided forward of the riding section.

[0005] The present invention aims to provide a stand-up vehicle that enables small turning radius by changing the posture (shifting the center of gravity) to reduce the difference in turning radius between the front and rear wheels (difference between the inner and outer wheels) during turning, without requiring the occupant to steer in an unstable posture. [Means for solving the problem]

[0006] The stand-on vehicle described in claim 1 comprises a front wheel section having one front wheel configured as a steering wheel and a riding section in which a passenger rides, a rear wheel section having two rear wheels and a rear wheel support section that rotatably supports the two rear wheels, and a joint section that connects the riding section and the rear wheel support section, wherein the joint section has, in this order from the front to the rear of the vehicle, a roll direction joint that has a degree of freedom of rotation about an axis that is approximately in the fore-and-aft direction of the vehicle, and a yaw direction joint that has a degree of freedom of rotation about an axis that is approximately in the up-and-down direction of the vehicle.

[0007] In claim 1, the stand-on vehicle includes a front wheel section and a rear wheel section. The front wheel section has one front wheel configured as a steering wheel and a riding section in which a passenger rides, and the rear wheel section has two rear wheels and a rear wheel support section that rotatably supports the two rear wheels. The stand-on vehicle also includes a joint that connects the riding section of the front wheel section and the rear wheel support section of the rear wheel section, and that has, from the front to the rear of the vehicle, a roll direction joint that has a degree of freedom of rotation about an axis that is generally along the fore-and-aft direction of the vehicle, and a yaw direction joint that has a degree of freedom of rotation about an axis that is generally along the up-and-down direction of the vehicle, in this order.

[0008] However, if the yaw joint is located forward of the passenger area, the direction of travel of the front wheels and the occupant will differ when turning, resulting in steering in an unstable position and, as a result, increasing the possibility of tipping over to the outside of the turn. In this regard, in claim 1, the front wheel portion has a riding portion, so that the yaw direction joint is located rearward of the riding portion, thereby solving the above problem.

[0009] Furthermore, if the joint section only has a yaw direction joint, it becomes difficult to control the vehicle due to changes in the occupant's posture (shift in the center of gravity), and the possibility of the vehicle tipping over to the outside of the turn increases. In this regard, in claim 1, the joint portion has a roll direction joint, which makes it easier to control the vehicle according to changes in the passenger's posture (shift of the center of gravity).

[0010] If the yaw joint is provided further forward of the roll joint, the rear wheels may tilt, which may reduce the controllability of the rear wheels. [Effects of the Invention]

[0011] As described above, according to the present invention, a stand-up vehicle is provided that enables tight turning by reducing the difference in turning radius between the front and rear wheels (difference between inner and outer wheels) when turning by changing the vehicle's posture (shifting the center of gravity) without the occupant steering in an unstable posture. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic side view of a stand-up type vehicle according to an embodiment. [Figure 2] 1A is a plan view showing the turning trajectory of a vehicle according to a comparative example, and FIG. 1B is a plan view showing the turning trajectory of a vehicle according to an embodiment. [Figure 3] 10A is a front view showing a turning state of a vehicle according to a modified example, and FIG. 10B is a front view showing a turning state of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] A stand-up vehicle 10 (hereinafter simply referred to as vehicle 10) according to an embodiment will be described below.

[0014] In each drawing, the arrow FR indicates the front of the vehicle, the arrow UP indicates the top of the vehicle, and the arrow OUT indicates the outside in the vehicle width direction. In the following description, unless otherwise specified, when the front-rear, up-down, and left-right directions are used, they refer to the front-rear direction of the vehicle, the up-down direction of the vehicle, and the left-right direction of the vehicle width.

[0015] The vehicle 10 includes a front wheel section 20, a rear wheel section 30, and a joint section 40.

[0016] The front wheel section 20 includes one front wheel 21, a vertical frame 22 extending substantially in the vertical direction, and a step frame 23. The front wheel 21 is rotatably supported relative to the vertical frame 22. The vertical frame 22 is connected to the front end of the step frame 23 so as to be rotatable around an axis extending substantially in the vertical direction of the vehicle. A handle 24 is provided at the upper end of the vertical frame 22. This configures the front wheel 21 as a steering wheel. The step frame 23 includes a riding section 23A and an inclined section 23B extending diagonally upward from the front end of the riding section 23A. The step frame 23 is connected to the vertical frame 22 at the inclined section 23B.

[0017] The rear wheel section 30 includes a rear wheel support section 31 (rear frame) and two rear wheels 32. The two rear wheels 32 are rotatably supported on both outer sides of the rear wheel support section 31 in the width direction.

[0018] The joint section 40 connects the rear end of the riding section 23A and the front end of the rear wheel support section 31. The joint section 40 includes, in this order from the front wheel section 20 side to the rear wheel section 30 side, a roll direction joint 41 and a yaw direction joint 42. The roll direction joint 41 is a joint that has a degree of freedom of rotation about an axis that extends substantially in the fore-and-aft direction of the vehicle, and the yaw direction joint 42 is a joint that has a degree of freedom of rotation about an axis that extends substantially in the up-and-down direction of the vehicle.

[0019] <Action and effect> Next, the effects of this embodiment will be described.

[0020] In this embodiment, as shown in Fig. 1, the stand-type vehicle 10 includes a front wheel section 20 and a rear wheel section 30. The front wheel section 20 has one front wheel 21 configured as a steered wheel and a riding section 23A (step) on which a passenger rides, while the rear wheel section 30 has two rear wheels 32 (see Fig. 2) and a rear wheel support section 31 that rotatably supports the two rear wheels 32. The stand-type vehicle 10 also includes a joint section 40. The joint section 40 connects the riding section 23A of the front wheel section 20 to the rear wheel support section 31 of the rear wheel section 30.

[0021] However, if the yaw direction joint 42 is located forward of the riding section 23A, a deviation occurs between the direction of travel of the front wheel 21 and the occupant when turning, resulting in steering in an unstable posture, and as a result, the possibility of tipping over to the outside of the turn increases. In this regard, in this embodiment, the front wheel unit 20 has a riding portion 23A. Therefore, as shown in Figure 2(B), the yaw direction joint 42 is located rearward of the riding portion 23A, which solves the above problem.

[0022] Specifically, in this embodiment, as shown in Fig. 2(B), the yaw direction joint 42 is located behind the riding section 23A, so that the turning movement of the rear wheel section 30 during turning can be delayed and the inner / outer wheel difference can be reduced. Note that Fig. 2(A) shows a vehicle 11 according to a comparative example that does not have a yaw direction joint.

[0023] Furthermore, if the joint 40 only has the yaw direction joint 42, it becomes difficult to control the vehicle due to changes in the occupant's posture (shift in the center of gravity), and the possibility of the vehicle tipping over to the outside of the turn increases. In this regard, in this embodiment, the joint portion 40 has a roll direction joint 41. This makes it easier to control the vehicle according to changes in the posture of the occupant (shifts in the center of gravity).

[0024] Specifically, in this embodiment, the joint 40 has the roll direction joint 41, so that the front wheel unit 20 can be tilted left and right as shown in FIG. 3(B), and the posture change can cause the mass of the occupant to be positioned on the inside of the turning trajectory. By positioning the mass of the occupant on the inside of the turning trajectory, a moment can be generated that offsets the moment that tends to tip to the outside of the turning caused by centrifugal force during turning. As a result, tipping to the outside of the turning can be prevented during turning. On the other hand, in the vehicle 11 according to the comparative example that does not have the roll direction joint 41, only a moment that tilts the vehicle body to the outside of the turn is applied due to the centrifugal force during the turn, as shown in FIG. 3(A). [Explanation of symbols]

[0025] 10 Standing vehicle (vehicle) 20 Front wheel 21 Front wheel 23A Passenger Area 30 Rear wheel 31 Rear wheel support part 32 rear wheel 40 Joint 41 Roll direction joint 42 Yaw direction joint

Claims

[Claim 1] a front wheel section having one front wheel configured as a steering wheel and a riding section in which a passenger rides; a rear wheel section including two rear wheels and a rear wheel support section that rotatably supports the two rear wheels; a joint portion that connects the riding portion and the rear wheel support portion, the joint portion has, in this order from the front side to the rear side of the vehicle, a roll direction joint having a degree of freedom of rotation about an axis along a substantially longitudinal direction of the vehicle, and a yaw direction joint having a degree of freedom of rotation about an axis along a substantially vertical direction of the vehicle; Stand-up vehicle.

Images