Annular spring and robot joint mechanism using the same
AssigneeHonda Motor Co., Ltd.
InventorSusumu Miyazaki
Life of this patent
Estimating the term…
Abstract
On an inner peripheral surface of an outer peripheral member 10, a recess 11 is formed to which a pipe spring 30 is fitted. On an outer peripheral surface of an inner peripheral member 20 arranged concentrically with and rotatable relatively to the outer peripheral member 10 on an inner peripheral side of the outer peripheral member 10, a cam surface 21 is formed which abuts against the pipe spring 30. The cam surface 21 protrudes in the radial direction as it is farther away in the circumferential direction of the outer peripheral member 10 from the point of contact with the pipe spring 30 in the state where no load is applied.
Claims7
An annular spring comprising an annular outer peripheral member, an annular inner peripheral member arranged concentrically with the outer peripheral member on an inner peripheral side of the outer peripheral member and rotatable relatively to the outer peripheral member, and an elastic member arranged between the outer peripheral member and the inner peripheral member, wherein
- the elastic member is composed of an elastic body having a circular cross section,
- one of an inner peripheral surface of the outer peripheral member and an outer peripheral surface of the inner peripheral member has formed thereon a recess to which the elastic member is fitted,
- the other of the inner peripheral surface and the outer peripheral surface has formed thereon a cam surface against which the elastic member abuts, and
- the cam surface is formed in such a way as to protrude in a radial direction as it is farther away in a circumferential direction of the outer peripheral member or the inner peripheral member from a point of contact with the elastic member in a state where the outer peripheral member and the inner peripheral member are not rotating relatively to each other.
Dependencies are inferred from the claim text.