Land-and-air vehicle and method of operating land-and-air vehicle

Patent metadata

Field	Value
Publication number	US-11820184-B2
Application number	US-202016936016-A
Country	US
Kind code	B2
Filing date	Jul 22, 2020
Priority date	Sep 30, 2019
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

A land-and-air vehicle configured to switch between a ground traveling mode and an aerial flight mode incudes a body, a wing, a wheel, a suspension, and a lock mechanism. The wing is attached to the body. The wheel is provided on a lower side of the body. The suspension is configured to support the body via the wheel on ground, and to contract due to self-weight of the land-and-air vehicle. The lock mechanism is configured to limit expansion of the suspension from a state in which the suspension has contracted due to the self-weight.

First claim

The invention claimed is:

1. A land-and-air vehicle configured to switch between a ground traveling mode and an aerial flight mode, the land-and-air vehicle comprising:
a body;
a wing attached to the body;
a wheel provided on a lower side of the body;
a suspension connecting the body and the wheel and configured to be expandable and contractible between a contraction position and an expansion position to which the suspension expands from the contraction position, the suspension contracting due to self-weight of the land-and-air vehicle in the ground traveling mode; and
a first lock mechanism configured to lock expansion of the suspension from a state in which the suspension has contracted due to the self-weight,
wherein the body covers the wheel and has an opening from which a part of the wheel protrudes downward both in the ground traveling mode and the aerial flight mode,
wherein the land-and-air vehicle further comprises:
a cover member configured to be closed to cover, and opened to uncover, the part of the wheel;
a movable member coupled to the cover member; and
a second lock mechanism configured to:
lock the movable member to maintain the cover member to be opened so that the part of the wheel is uncovered; and
unlock the movable member to allow the cover member to move downward due to self-weight of the cover member so that the cover member is closed to cover the part of the wheel;

wherein the movable member is configured to touch ground to prevent the cover member from touching the ground.

2. A land-and-air vehicle having a ground traveling mode, an aerial flight mode, a vertical takeoff mode, and a vertical landing mode, the land-and-air vehicle comprising:
a body;
a wind attached to the body;
a wheel provided on a lower side of the body, at least a lower part of the wheel being positioned outside the body in both the ground traveling mode and the aerial flight mode;
a suspension connecting the body and the wheel and configured to be expandable and contractible between a contraction position and an expansion position to which the suspension expands from the contraction position, the suspension contracting to contract due to self-weight of the land-and-air vehicle;
a first lock mechanism configured to lock the suspension to prevent expansion of the suspension;
a cover member configured to be closed to cover at least the lower part of the wheel, and to be opened to uncover the lower part of the wheel, the cover member having a curved shape along with a shape of the lower part of the wheel when the cover member covers the lower part of the wheel;
a movable member configured to move between a first position and a second position, the movable member being coupled to the cover member so that (1) when the movable member moves to the first position, the movable member causes the cover member to cover the lower part of the wheel, and (2) when the movable member moves to the second position, the movable member causes the cover member to uncover the lower part of the wheel, the movable member being configured to touch ground to prevent the cover member from touching the ground; and
a second lock mechanism configured to lock the movable member.

3. A method comprising:
limiting the expansion of the suspension by putting the first lock mechanism into a lock state before takeoff of the land-and-air vehicle according to claim 2 ; and
allowing the expansion of the suspension by putting the first lock mechanism into an unlock state before landing of the land-and-air vehicle.

4. The land-and-air vehicle according to claim 2 ,
wherein, when the land-and-air vehicle is in the ground traveling mode, the first lock mechanism is configured to lock the suspension to prevent expansion of the suspension from a state in which the suspension has contracted due to the self-weight of the land-and-air vehicle, and
wherein, when the land-and-air vehicle is in the ground traveling mode, the second lock mechanism is configured to lock the movable member at the second position to cause the cover member to uncover the lower part of the wheel.

5. The land-and-air vehicle according to claim 4 ,
wherein, when the land-and-air vehicle is in a mode other than the ground traveling mode, the first lock mechanism is configured to unlock the suspension, and
wherein, when the land-and-air vehicle is in a mode other that the ground traveling mode, the second lock mechanism is configured to unlock the movable member to allow the movable member to move downward to the first position due to self-weight of the movable member in order to cause the cover member to cover the lower part of the wheel.

6. The land-and-air vehicle according to claim 5 , wherein after the ground traveling mode before the vertical takeoff mode, the movable member touches the ground before moving to the first position to cause the cover member to partially cover the lower part of the wheel.

7. The land-and-air vehicle according to claim 6 , wherein after the land-and-air vehicle takes off the ground in the vertical takeoff mode, the movable member moves to the first position to cause the cover member to cover the lower part of the wheel.

8. The land-and-air vehicle according to claim 7 , wherein when the movable member touches the ground during the vertical landing mode, the movable member moves toward the second position, in response to touching the ground, to cause the cover member to partially open so that the wheel touches the ground.

9. The land-and-air vehicle according to claim 7 , wherein during the vertical landing mode, the second lock mechanism is configured to lock the movable member at the first position so that the land-and-air vehicle lands the ground using the movable member in place of the wheel.

Assignees

• Subaru Corp

Inventors

• Hirabayashi Daisuke
• Tajiri Keisuke

Classifications

• B60F5/02 Primary

  convertible into aircraft (convertible aircraft B64C37/00; convertible unmanned aerial vehicle [UAV]-type aircraft, e.g. convertible into land vehicles, B64U10/70) · CPC title

• B60G5/005

  the wheels being fixed on a non-pivotal structure, e.g. a sliding mount · CPC title

• B64C25/16

  Fairings movable in conjunction with undercarriage elements · CPC title

• B64C25/58

  Arrangements or adaptations of shock-absorbers or springs (shimmy-dampers B64C25/50) · CPC title

• B64C29/0033

  the propellers being tiltable relative to the fuselage · CPC title