Biped Mobile Mechanism

• US 20090114460A1
• Filed: 11/05/2008
• Published: 05/07/2009
• Est. Priority Date: 11/05/2007
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: TAMAMOTO, Junichi, NAKAMURA, Ryosuke, AMINO, Azusa
• Application Number:
  US12/264,969
• Publication Number:
  US 20090114460A1
• Time in Patent Office: Days
• US Class Current: 180/8.300
• CPC Class Codes: B62D 57/028 having wheels and mechanical legs B62D57/024 takes precedence; ground-engaging vehicle fittings for supporting, lifting or manoeuvring the vehicle, wholly or in part B60S9/00

Abstract

A robot having a leg mechanism having high rigidity, so as to enable moving on wheels, on the leveled ground, and also moving on the bipedalism, on the unleveled ground, and also enabling to execute exchanging between the wheel running and the bipedalism in a short time, comprising: a body; and left and right leg portions in lower portion of the body, wherein each leg portion has a wheel, which can be drive, at a tip thereof, and a supporting portion, which is movable in roll and pitch directions, the each leg portion has three (3) degrees of freedom, roll, pitch and pitch from the body side, and the supporting portion has at least two (2) of contact points to be in contact with a ground, and makes up a stable region by a contact point of the wheel and the contact point of the supporting body, and thereby oscillating the left and right leg portions, alternately, so as to make bipedalism, and further operating the supporting body, so as to run on the wheels.

Claims

1. A robot, comprising:

a body; and

left and right leg portions in lower portion of said body, wherein

each leg portion has a wheel, which can be drive, at a tip thereof, and a supporting portion, which is movable in roll and pitch directions.

2. The robot, described in the claim 1, wherein

said each leg portion has three (3) degrees of freedom, roll, pitch and pitch from said body side.

3. The robot, described in the claim 1, wherein

said supporting portion has at least two (2) of contact points to be in contact with a ground, and makes up a stable region by a contact point of said wheel and the contact point of said supporting body, and thereby oscillating said left and right leg portions, alternately, so as to make bipedalism, and further operating said supporting body, so as to run on said wheels.

4. The robot, described in the claim 1, wherein

a distance of a roll rotation shaft of said supporting body from a ground is so determined that the roll rotation shaft of said supporting body comes to be in parallel with said ground when at least two (2) points, including, are in contact with the ground, and also said roll rotation shaft of said supporting body and a center of cross-section circle of said roll rotation shaft are constructed to be coincident with, and

a pitch rotation shaft of said supporting body and a rotation shaft of said wheel are constructed to be coincident with each other.