Drive transmission device for transmitting rotary drive

Patent metadata

Field	Value
Publication number	US-2016169364-A1
Application number	US-201514962920-A
Country	US
Kind code	A1
Filing date	Dec 8, 2015
Priority date	Dec 11, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A drive transmission device includes a shaft supporting member attached to a drive frame. The shaft supporting member rotatably supports a driving shaft. The shaft supporting member includes two bearing surfaces for rotatably holding the driving shaft, where the two bearing surfaces are disposed so as to be on a straight line, and a boss portion having the center thereof located on the straight line for positioning the drive transmission device relative to the drive frame.

First claim

What is claimed is:

1 . A drive transmission device comprising:
a driving shaft; a shaft supporting member configured to support the driving shaft rotatably; a member to be attached to which the shaft supporting member is attached; and a rotary member attached to the driving shaft and configured to transmit driving force, wherein the member to be attached includes a positioning hole configured to position the shaft supporting member, wherein the shaft supporting member includes: a first bearing portion with which a first bearing surface configured to support the driving shaft is provided; a second bearing portion with which a second bearing surface configured to support the driving shaft is provided; a connecting portion configured to connect the first bearing portion and the second bearing portion; a positioning portion engaged with the positioning hole for positioning the shaft supporting member with respect to the member to be attached; wherein the first bearing portion, the second bearing portion, the connecting portion, and the positioning portion are integrally formed, wherein a position of the first bearing portion and a position of the second bearing portion are different from each other in axial direction of the driving shaft, and wherein a center of axis of the first bearing surface, a center of axis of the second bearing surface, and a center of the positioning portion are disposed on substantially the same straight line.

2 . The drive transmission device according to claim 1 , wherein the shape of the positioning portion is a circular arc.

3 . The drive transmission device according to claim 1 , wherein a material used for the shaft supporting member is electrically conductive.

4 . The drive transmission device according to claim 1 , wherein the positioning portion has an insertion hole thereinside, and
the shaft passes through the insertion hole.

5 . The drive transmission device according to claim 4 , wherein the insertion hole is a round hole having a diameter that is the same as the diameter of the first bearing surface.

6 . The drive transmission device according to claim 1 , wherein the member to be attached is a plate-like frame, and
wherein the shaft has the rotary member and another rotary member attached thereto so that the two rotary members are located on either side of the frame.

7 . The drive transmission device according to claim 1 , wherein the connecting portion has a fastening hole through which a screw is inserted and a surface to be fastened, and
the member to be attached has a screw hole, and wherein by inserting the screw into the fastening hole and threading the screw into the screw hole, the shaft supporting member is fixed to the member to be attached.

8 . The drive transmission device according to claim 1 , wherein the second bearing portion is supported by the connecting portion in a cantilever fashion.

9 . The drive transmission device according to claim 1 , wherein the rotary member includes a gear.

10 . The drive transmission device according to claim 1 , further comprising:
a caulking shaft fixed to the member to be attached; and another gear configured to rotate about the caulking shaft, that is meshed with the additional gear.

11 . The drive transmission device according to claim 1 , wherein the rotary member is disposed between the first bearing portion and the second bearing portion.

12 . The drive transmission device according to claim 1 , wherein the rotary member includes a one-way clutch, and
wherein the rotary member is disposed between the first bearing portion and the second bearing portion.

13 . The drive transmission device according to claim 1 , wherein the first bearing portion has an attaching surface perpendicular to the straight line, and
the member to be attached has a surface to be attached to which the shaft supporting member is attached, and wherein the positioning hole is formed in the surface to be attached, and the attaching surface is in contact with the surface to be attached.

14 . The drive transmission device according to claim 11 , wherein the rotary member includes a first rotary portion having a radius of R 1 and a second rotary portion having a radius of R 2 that is smaller than R 1 ,
wherein the first rotary portion and the second rotary portion are disposed at different positions in the axial direction of the driving shaft,
wherein the connecting portion includes a first portion and a second portion, a shortest distance between the first portion and the straight line is longer than Y 1 , a shortest distance Y 2 between the second portion and the straight line is shorter than Y 1 , and
the first portion and the second portion are disposed at different positions in the axial direction of the driving shaft, and
wherein R 1 <Y 1 , R 2 <Y 2 , R 1 >Y 2 , and X 1 >X 2 , where X 1 represents a width of the rotary member in the axial direction of the driving shaft, and X 2 represents a length of the first portion in the axial direction of the driving shaft.

15 . The drive transmission device according to claim 11 , wherein the rotary member has a projecting portion, and
the shaft supporting member has a recess portion, and wherein the projecting portion enters the recess portion.

16 . The drive transmission device according to claim 11 , wherein the rotary member has a recess portion, and
the shaft supporting member has a projecting portion, and wherein the projecting portion enters the recess portion.

17 . The drive transmission device according to claim 1 , wherein the shaft supporting member is integrally molded.

Assignees

• Canon Kk

Inventors

• Kataoka Hisashi

Classifications

• F16H2057/0216

  Intermediate shaft supports, e.g. by using a partition wall · CPC title

• F16H2057/0224

  using eccentric bushes · CPC title

• G03G15/6511

  Feeding devices for picking up or separation of copy sheets · CPC title

• B41J23/02

  Mechanical power drives · CPC title

• B65H3/0669

  Driving devices therefor · CPC title