Drive Transmission Mechanism for Precise Multi-Axis Rotation
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Solution Overview
Problem
Current driving force transmitting mechanisms in image forming apparatuses, such as copiers and printers, face challenges in achieving high precision in transmitting rotary driving force between cylindrical shafts and solid shafts, necessitating a more precise configuration.
Innovation Solution
A driving force transmitting mechanism comprising a first rotating member, a driving force transmitting member, a cylindrical shaft with an engaging portion, and a second rotating member, where the first rotating member includes contacting portions with the outer peripheral surface of the second rotating member, enabling precise transmission of driving force between two rotation axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a coupling member is disposed between a cylindrical shaft and a solid shaft to transmit driving force, then highly precise transmission of rotary driving force is implemented, but the device complexity increases
Solution Approach 1:
The patent merges the coupling member and the solid shaft into an integrated structure where the coupling member is formed as a unified component with the shaft. This integration eliminates separate parts while maintaining the precise driving force transmission function, thereby reducing device complexity without sacrificing precision.
Solution Approach 2:
The coupling member is designed to serve multiple functions: it transmits driving force precisely, provides structural support, and enables engagement between the cylindrical shaft and the solid shaft. By combining multiple functions into a single component, the overall device complexity is reduced while maintaining high transmission precision.
2Measurement precision
If a coupling member is disposed between a cylindrical shaft and a solid shaft to transmit driving force, then highly precise transmission of rotary driving force is implemented, but the manufacturing cost increases
Solution Approach 1:
By integrating the coupling member and shaft into a unified component, the number of parts to be manufactured and assembled is reduced. This simplification decreases manufacturing complexity and associated costs, while the design maintains high precision driving force transmission capabilities.
Solution Approach 2:
The patent optimizes the geometric parameters and material properties of the integrated coupling member-shaft structure to achieve high precision transmission. By carefully selecting and adjusting these parameters during the design phase, the manufacturing process is simplified and costs are reduced without compromising transmission precision.
3Measurement precision
If the first rotating member contacts with the second rotating member through contacting portions, then rotation irregularities are reduced and transmission precision is improved, but the friction and wear increase
Solution Approach 1:
The contacting portions between the first and second rotating members are designed with curved or spherical surfaces rather than flat contacts. This curvature distributes the contact pressure more evenly, reduces stress concentration, and minimizes wear while maintaining precise rotation transmission through smooth rolling contact.
Solution Approach 2:
The patent introduces a lubricant or lubricating film between the contacting portions of the rotating members. This lubrication layer reduces direct metal-to-metal contact, thereby decreasing friction and wear while maintaining the precision of rotation transmission through the lubricated interface.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for even higher precision in driving force transmission between two rotation axes, enhancing the performance of image forming apparatuses by minimizing rotation irregularities and maintaining stability during operation.
Implementation Method 1
a driving force transmitting member which includes a transmitted surface and rotates together with the first rotation member, and to which driving force is transmitted from the first rotation member by the transmitted surface contacting with the transmitting surface
Implementation Method 2
a cylindrical shaft which contacts with the first rotating member in a direction perpendicular to the first rotation axis, and which includes an engaging portion to engage with the driving force transmitting member
Implementation Method 3
the first rotating member includes at least one contacting portion that contacts with an outer peripheral surface of the second rotating member
Data Source
AI summary
Provided is a driving force transmitting mechanism including: a first rotating member which rotates around a first rotation axial; a driving force transmitting member which rotates together with the first rotation member, and to which driving force is transmitted from the first rotating member; a cylindrical shaft which contacts with the first rotating member in a diameter direction, and which includes an engaging portion to engage with the driving force transmitting member, and is coaxially rotated with the first rotating member by the driving force from the driving force transmitting member at the engaging portion; and a second rotating member which is rotated around a second rotation axial, disposed next to the first rotation axis in an axial direction, by the driving force transmitted from the cylindrical shaft. The first rotating member includes at least one contacting portion that contacts with the second rotating member.