Automatic transmission
AssigneeJATCO Ltd
InventorJun Furuichi
Life of this patent
Estimating the term…
Abstract
An automatic transmission includes a clutch drum formed, by press forming, with splines including recessed portions and raised portions, and engaging with clutch plates; and a rotational speed measuring device configured to measure a rotational speed of the clutch drum, and including a surface sensing device disposed outside an outer surface of the clutch drum, and configured to sense movement of the recessed portions and the raised portions of the splines. The clutch drum includes first openings each formed in one of the recessed portions recessed radially inwards, and each confronting the clutch plates radially.
Claims8
An automatic transmission comprising:
- a clutch drum formed, by press forming, with splines including recessed portions and raised portions and engaging with clutch plates;
- and
- a rotational speed measuring device configured to measure a rotational speed of the clutch drum, and including a surface sensing device disposed outside an outer surface of the clutch drum, and configured to sense movement of the recessed portions and the raised portions of the splines;
- the clutch drum including first openings each formed in one of the recessed portions recessed radially inwards, and each confronting the clutch plates radially,
- wherein the rotational speed measuring device confronts the first openings of the clutch drum radially.
An automatic transmission comprising:
- a clutch drum formed, by press forming, with splines including recessed portions and raised portions and engaging with clutch plates;
- and
- a rotational speed measuring device configured to measure a rotational speed of the clutch drum, and including a surface sensing device disposed outside an outer surface of the clutch drum, and configured to sense movement of the recessed portions and the raised portions of the splines;
- the clutch drum including first openings each formed in one of the recessed portions recessed radially inwards, and each confronting the clutch plates radially,
- wherein the clutch drum includes second openings each formed in one of the raised portions raised radially outwards, and each located at an axial position which is near one of the first openings of the clutch drum, and which is separated from the surface sensing device in an axial direction of the clutch drum.
An automatic transmission comprising:
- a clutch drum formed, by press forming, with splines including recessed portions and raised portions, and engaging with clutch plates;
- and
- a rotational speed measuring device configured to measure a rotational speed of the clutch drum, and including a surface sensing device disposed outside an outer surface of the clutch drum, and configured to sense movement of the recessed portions and the raised portions of the splines;
- the clutch drum including a first opening which is formed in one of the recessed portions recessed radially inwards, and which is formed to overlap the clutch plates in an axial direction of the clutch drums,
- wherein the rotational speed measuring device confronts the first opening of the clutch drum radially.
Dependencies are inferred from the claim text.