Suspension system for one-wheeled vehicle

Patent metadata

Field	Value
Publication number	US-10272319-B2
Application number	US-201815972469-A
Country	US
Kind code	B2
Filing date	May 7, 2018
Priority date	Oct 11, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A self-propelled, one-wheeled vehicle may include a suspension system configured to provide arcuate, generally vertical motion of a board relative to an axle of a central wheel assembly when the vehicle encounters obstacles and bumps on a riding surface. Illustrative suspension systems may include a shock absorber and a swingarm that couple the wheel assembly to the board.

First claim

What is claimed is:

1. A shock absorbing, self-balancing electric skateboard, comprising:
a board configured to receive left and right feet of a rider oriented generally perpendicular to a direction of travel of the board;
a wheel assembly including a rotatable wheel;
a motor assembly configured to rotate the wheel around an axle to propel the skateboard;
at least one sensor configured to measure orientation information of the board;
a motor controller configured to receive orientation information measured by the sensor and to cause the motor assembly to propel the skateboard based on the orientation information;
a compressible shock absorber;
a first linkage assembly connecting a first end of the shock absorber to the board; and
a second linkage assembly connecting a second end of the shock absorber to the wheel;
wherein at least one member of one of the linkage assemblies is rotatable on an axis extending perpendicular to the direction of travel of the board, and wherein compression of the shock absorber is configured to allow the board to move relative to the wheel in response to bumps encountered by the wheel.

2. The electric skateboard of claim 1 , wherein the second linkage assembly is a single-sided swingarm assembly that connects the second end of the shock absorber to exactly one lateral side of the wheel.

3. The electric skateboard of claim 1 , wherein the second linkage assembly is a dual-sided swingarm assembly that operatively connects the second end of the shock absorber to both lateral sides of the wheel.

4. The electric skateboard of claim 1 , wherein the first linkage assembly is non-rotatably attached to the board, and rotatably attached to the shock absorber.

5. The electric skateboard of claim 4 , wherein the first linkage assembly is attached to the board at two separated positions on one lateral side of the board.

6. The electric skateboard of claim 5 , wherein the first linkage assembly is attached to the board at two separated positions on each lateral side of the board.

7. The electric skateboard of claim 6 , wherein the first linkage assembly includes a first plate member rigidly attached to a first side of the board and rotatably attached to the first end of the shock absorber, a second plate member rigidly attached to a second side of the board, and a connecting member joining the first and second plate members and rotatably attached to each of the first and second plate members.

8. The electric skateboard of claim 7 , wherein the first linkage assembly comprises a strut assembly including first and second strut members, the first strut member having one end rotatably attached to the second plate member and another end rotatably attached to the second strut member, the second strut member having one end non-rotatably attached to the wheel and another end rotatably attached to the first strut member, wherein the first and second strut members are collectively configured to allow the first linkage assembly to move symmetrically on each lateral side of the board, with respect to a plane defined by the board.

9. The electric skateboard of claim 7 , wherein the first linkage assembly includes first and second strut members, the first strut member having one end rotatably attached to the second plate member and another end rotatably attached to the second strut member, the second strut member having one end non-rotatably attached to an axle of the wheel and another end rotatably attached to the first strut member, wherein the first and second strut members are collectively configured to impede spinning of the axle relative to the board.

10. A self-balancing electric vehicle, comprising:
a board defining a riding plane and configured to receive left and right feet of a rider;
a rotatable wheel extending above and below the board;
a motor configured to rotate the wheel around an axis of rotation to propel the vehicle;
at least one sensor configured to measure orientation information of the board;
a motor controller configured to receive orientation information measured by the sensor and to cause the motor to propel the vehicle based on the orientation information; and
a linkage assembly linking the wheel to the board, the linkage assembly including:
first and second extension arms, each rotatably attached to a respective lateral side of the wheel;
a connecting member rigidly interconnecting the extension arms;
a shock absorber having a first end coupled to the connecting member; and
a first coupling member joining a second end of the shock absorber to the board;

wherein the linkage assembly is configured to allow the riding plane of the board to move in an arcuate, generally vertical direction relative to the axis of rotation of the wheel, in response to bumps encountered by the wheel.

11. The electric vehicle of claim 10 , wherein the linkage assembly further includes a strut assembly having a first end affixed to an axle of the wheel, and the first coupling member joins the second end of the shock absorber to a first lateral side of the board and a second coupling member joins a second end of the strut assembly to a second lateral side of the board.

12. The electric vehicle of claim 11 , wherein the strut assembly includes first and second strut members pivotably joined together.

13. The electric vehicle of claim 11 , wherein the first and second coupling members are parallel planar members each rigidly attached to a respective lateral side of the board.

14. The electric vehicle of claim 13 , wherein each coupling member is attached to the board at two separated attachment points.

15. The electric vehicle of claim 10 , including two wheels sharing a common axis of rotation.

16. An electric vehicle, comprising:
a board including first and second deck portions each configured to receive a left or right foot of a rider;
a wheel assembly including a ground-contacting element extending above the first and second deck portions;
a motor assembly mounted to the wheel assembly and configured to rotate the ground-contacting element around an axle to propel the electric vehicle;
at least one orientation sensor configured to measure orientation information of the board;
a motor controller configured to receive board orientation information measured by the orientation sensor and to cause the motor assembly to propel the electric vehicle based on the board orientation information; and
a suspension system including a shock absorber operatively coupled to a swingarm having a proximal end pivotably coupled to the board and a distal end coupled to the axle, such that the board is displaceable relative to the axle along an arcuate, generally vertical path;
wherein the shock absorber is coupled to the swingarm and the board on a first side of the wheel assembly, the suspension system further including a torque arm coupled to the axle and the board on a second side of the wheel assembly.

Assignees

• Future Motion Inc

Inventors

• Doerksen Kyle Jonathan
• O'Brien Matthew Michael

Classifications

• Y02T10/645

  Cross-Sectional Technologies · mapped topic

• B60L2260/34

  Stabilising upright position of vehicles, e.g. of single axle vehicles · CPC title

• Y02T10/7275

  Cross-Sectional Technologies · mapped topic

• B62K11/007

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

• B60L2200/16

  Single-axle vehicles · CPC title