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US 10,476,342 B2Granted
Shimless gear transmission
AssigneeNidec Motor Corporation
InventorsJoshua M. Biro, Philip S. Johnson, Masatoshi Onishi, Barry M. Newberg
Life of this patent
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Abstract
Electric motors are disclosed. The motors are preferably for use in an automated vehicle, although any one or more of a variety of motor uses are suitable. The motors include lift, turntable, and locomotion motors.
Claims20
A gear assembly comprising:
- a first axially arranged system including—
- a first shaft rotatable about a first axis,
- a first gear fixed to the first shaft,
- said first gear configured such that rotation thereof generates at least part of a first load in a first direction along the first axis, and
- a resiliently deflectable spring element axially aligned with the first gear and creating a second load acting on the first gear in a second direction that is opposite the first direction;
- and
- a second axially arranged system including—
- a second shaft rotatable about a second axis,
- said second axis being parallel to the first axis,
- a second gear fixed to the second shaft,
- rotation of the first shaft and the first gear corresponding to rotation of the second shaft and the second gear, and
- an adjustable nut axially aligned with the second gear and torqued to create a third load acting on the second gear in the second direction,
- said loads cooperating to reduce axial shifting of the systems,
- said first system including a first bearing rotatably supporting the first shaft and configured to be seated in such a manner that axial shifting of the first bearing in the second direction is restricted,
- said first bearing presenting a first bearing face,
- said first shaft integrally defining a first shoulder presenting a first shoulder face,
- said first shoulder face being disposed axially between the first gear and the first bearing, and engaging the first bearing face such that axial shifting of the first shaft and the first gear in the second direction is restricted.
14 more elements
A gear assembly comprising:
- a first axially arranged system including—
- a first shaft rotatable about a first axis,
- a first gear fixed to the first shaft,
- said first gear configured such that rotation thereof generates at least part of a first load in a first direction along the first axis, and
- a resiliently deflectable spring element axially aligned with the first gear and creating a second load acting on the first gear in a second direction that is opposite the first direction;
- and
- a second axially arranged system including—
- a second shaft rotatable about a second axis,
- said second axis being parallel to the first axis,
- a second gear fixed to the second shaft,
- rotation of the first shaft and the first gear corresponding to rotation of the second shaft and the second gear, and
- an adjustable nut axially aligned with the second gear and torqued to create a third load acting on the second gear in the second direction,
- said loads cooperating to reduce axial shifting of the systems,
- said second system including a second bearing rotatably supporting the second shaft and configured to be seated in such a manner that axial shifting of the second bearing in the second direction is restricted,
- said second bearing presenting a second bearing face,
- said second shaft integrally defining a second shoulder presenting a second shoulder face,
- said second shoulder face being disposed axially between the second gear and the second bearing, and engaging the second bearing face such that axial shifting of the second shaft and the second gear in the second direction is restricted.
14 more elements
Dependencies are inferred from the claim text.