Moving vehicle

Patent metadata

Field	Value
Publication number	US-11891149-B2
Application number	US-202017113562-A
Country	US
Kind code	B2
Filing date	Dec 7, 2020
Priority date	Dec 27, 2019
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A moving vehicle according to the present disclosure includes a chair frame including universal casters, a sitting seat disposed above the chair frame and connected to the chair frame, and a driving unit disposed below the sitting seat and connected to the chair frame so that the driving unit can rotate about a unit connection shaft, in which the driving unit includes a driving wheel including a rotation shaft located at a position deviated from a central axis of the unit connection shaft, a velocity detection unit configured to detect a rotational velocity of the driving wheel, and a driving control unit configured to control a velocity of the driving wheel according to an external driving force applied to the driving wheel.

First claim

What is claimed is:

1. A moving vehicle comprising:
a chair frame comprising universal casters;
a sitting seat disposed above the chair frame and connected to the chair frame; and
a driving unit disposed below the sitting seat and connected to the chair frame so that the driving unit can rotate about a unit connection shaft, wherein
the driving unit comprises:
a driving wheel comprising a rotation shaft located at a position deviated from a central axis of the unit connection shaft;
a velocity detection unit configured to detect a rotational velocity of the driving wheel; and
a driving control unit configured to control a velocity of the driving wheel according to an external driving force applied to the driving wheel, wherein
the driving control unit does not supply power to the driving wheel in a period during which a velocity of the moving vehicle is equal to or lower than a first velocity, and
the driving control unit supplies power for moving the moving vehicle at the first velocity to the driving wheel when the velocity of the moving vehicle becomes a velocity that is higher than the first velocity and is equal to or lower than a second velocity higher than the first velocity.

2. The moving vehicle according to claim 1 , wherein the driving control unit supplies power for moving the moving vehicle at a third velocity higher than the second velocity to the driving wheel when the velocity of the moving vehicle becomes higher than the second velocity.

3. The moving vehicle according to claim 1 , wherein the driving unit is connected to the chair frame with the unit connection shaft interposed therebetween.

4. The moving vehicle according to claim 1 , wherein
a seat shaft functions as the unit connection shaft, the seat shaft connecting the chair frame with the sitting seat, and
the driving unit is connected to the chair frame without the unit connection shaft interposed therebetween.

5. The moving vehicle according to claim 1 , wherein the unit connection shaft comprises a traction spring configured to press the driving wheel against a ground surface.

6. A moving vehicle comprising:
a chair frame comprising universal casters;
a sitting seat disposed above the chair frame and connected to the chair frame; and
a driving unit disposed below the sitting seat and connected to the chair frame so that the driving unit can rotate about a unit connection shaft, wherein
the driving unit comprises:
a driving wheel comprising a rotation shaft located at a position deviated from a central axis of the unit connection shaft;
a velocity detection unit configured to detect a rotational velocity of the driving wheel; and
a driving control unit configured to control a velocity of the driving wheel according to an external driving force applied to the driving wheel,
wherein the driving control unit stops supplying power to the driving wheel when a time during which a torque larger than a predefined limit torque is applied to the driving wheel by an external driving force continues for a predefined limit time or longer.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hasegawa Koji

Classifications

• B62K11/007 Primary

  Automatic balancing machines with single main ground engaging wheel or coaxial wheels supporting a rider · CPC title

• A47C7/006 Primary

  with castors · CPC title

• B62D61/10 Primary

  with more than four wheels {(tractors of the low ground pressure type B62D49/002)} · CPC title

• B60K1/00

  Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title

• A47C9/027

  Stools for work at ground level · CPC title