Drive transmitter and image forming apparatus incorporating the drive transmitter
AssigneeRicoh Company, Ltd.
InventorsNarumi SUGITA, Masahiro Ishida, Shogo Sakamoto, Naoki Matsuda
Life of this patent
Estimating the term…
Abstract
A drive transmitter includes an internally toothed gear, a first support shaft to rotatably support the internally toothed gear without using a bearing, a drive source to apply a driving force to the internally toothed gear, a rotary body to which the driving force is transmitted via the internally toothed gear, and a grease retainer disposed on the first support shaft and to retain grease on at least one of a portion of the first support shaft facing the internally toothed gear and a portion of the internally toothed gear facing the first support shaft. An image forming apparatus includes the drive transmitter.
Claims9
-20. (canceled)
A drive transmitter, comprising:
- a rotary body including a drive transmission portion;
- and
- a support shaft configured to support the rotary body,
- the support shaft including a support shaft side slide portion near both ends in an axial direction of the support shaft,
- the rotary body including a support shaft inserting hole into which the support shaft is inserted, and a rotary body side slide portion disposed near a portion at which the support shaft inserting hole is opposed to the support shaft side slide portion,
- a diameter of the support shaft inserting hole gradually increasing from a peripheral portion of the rotary body side sliding portion toward a peripheral portion of the center in the axial direction of the support shaft inserting hole.
A drive transmitter, comprising:
- a rotary body including a drive transmission portion;
- a support shaft configured to support the rotary body,
- the rotary body including a support shaft inserting hole into which the support shaft is inserted, an inner circumferential cylindrical portion constituting the support shaft inserting hole, and an outer circumferential cylindrical portion constituting the drive transmission portion;
- and
- a coupling portion configured to couple the outer circumferential cylindrical portion and the inner circumferential cylindrical portion in a radial direction of the rotary body,
- a diameter of the support shaft inserting hole gradually increasing from a peripheral portion of an axial end portion of the support shaft inserting hole toward a joint portion of the coupling portion and the inner circumferential cylindrical portion.
Dependencies are inferred from the claim text.