Friction transmission device
AssigneeSumitomo Heavy Industries, Ltd.
InventorToshiya Nagumo
Life of this patent
Estimating the term…
Abstract
A friction transmission device includes: an input trajectory ring; a planetary rolling body that is disposed about a rotation axis line of the input trajectory ring and that comes into contact with the input trajectory ring; an output trajectory ring that comes into contact with the planetary rolling body and that is connected to an output member; and a first support trajectory ring and a second support trajectory ring that come into contact with the planetary rolling body; in which at least one of the input trajectory ring, the output trajectory ring, the first support trajectory ring, or the second support trajectory ring is a convex-concave contact trajectory ring that comes into convex-concave contact with the planetary rolling body.
Claims10
A friction transmission device comprising:
- an input trajectory ring;
- a planetary rolling body that is disposed about a rotation axis line of the input trajectory ring and that comes into contact with the input trajectory ring;
- an output trajectory ring that comes into contact with the planetary rolling body and that is connected to an output member;
- and
- a first support trajectory ring and a second support trajectory ring that come into contact with the planetary rolling body,
- wherein at least one of the input trajectory ring, the output trajectory ring, the first support trajectory ring, or the second support trajectory ring is a convex-concave contact trajectory ring that comes into convex-concave contact with the planetary rolling body,
- in the planetary rolling body, a quadrangle is formed by an extension line of a normal vector at a contact point with each of the input trajectory ring, the output trajectory ring, the first support trajectory ring, and the second support trajectory ring, and
- lengths of two sides of the quadrangle, which are positioned inward in a radial direction of the rotation axis line, are longer than lengths of two sides, which are positioned outward in the radial direction of the rotation axis line.
A friction transmission device comprising:
- an input trajectory ring;
- a planetary rolling body that is disposed about a rotation axis line of the input trajectory ring and that comes into contact with the input trajectory ring;
- an output trajectory ring that comes into contact with the planetary rolling body and that is connected to an output member;
- and
- a first support trajectory ring and a second support trajectory ring that come into contact with the planetary rolling body,
- wherein at least one of the input trajectory ring, the output trajectory ring, the first support trajectory ring, or the second support trajectory ring is a convex-concave contact trajectory ring that comes into convex-concave contact with the planetary rolling body,
- the convex-concave contact trajectory ring includes an inner trajectory ring positioned inward in a radial direction,
- the inner trajectory ring includes an inner convex surface of which a contact surface with the planetary rolling body is configured by a convex surface, and
- the planetary rolling body includes a planetary rolling body inner concave surface of which a contact surface with the inner trajectory ring is configured by a concave surface.
A friction transmission device comprising:
- an input trajectory ring;
- a planetary rolling body that is disposed about a rotation axis line of the input trajectory ring and that comes into contact with the input trajectory ring;
- an output trajectory ring that comes into contact with the planetary rolling body and that is connected to an output member;
- and
- a first support trajectory ring and a second support trajectory ring that come into contact with the planetary rolling body,
- wherein at least one of the input trajectory ring, the output trajectory ring, the first support trajectory ring, or the second support trajectory ring is a convex-concave contact trajectory ring that comes into convex-concave contact with the planetary rolling body,
- the planetary rolling body and one or more additional planetary rolling bodies are disposed at a predetermined interval in a circumferential direction of the rotation axis line,
- the friction transmission device further comprises a holder that restricts movements of the planetary rolling bodies in the circumferential direction of the rotation axis line, and
- the holder includes two ring portions that are disposed to be separated from each other in an axial direction with the planetary rolling body interposed between the ring portions.
Dependencies are inferred from the claim text.