Belt Drive Bearing Structure for Pulley Alignment Stability
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Solution Overview
Problem
Existing belt driving mechanisms experience misalignment due to slight shifts in the position, angle, and posture of driving and driven pulleys, leading to belt meandering and misalignment, which disrupt proper rotation transmission.
Innovation Solution
A belt driving mechanism with a bearing structure that includes first and second bearing parts supporting the transmission shaft, a housing with a fixed frame and movable frame, and a circumference correction part to maintain proper tension and alignment of the belt, using a DC motor as the drive source and a belt made of stainless steel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a belt is applied with predetermined tension to transmit rotation from driving pulley to driven pulley, then rotation transmission is achieved, but the driven pulley moves slightly toward the driving pulley causing misalignment
Solution Approach 1:
The bearing structure is divided into two separate bearing parts: the first bearing part supports the driving pulley while the second bearing part supports the driven pulley. This segmentation allows each pulley to be independently supported, preventing the driven pulley from moving toward the driving pulley due to belt tension, thereby maintaining alignment precision while enabling reliable rotation transmission.
2Reliability
If the position and angle of driving pulley and driven pulley are slightly shifted, then belt meandering occurs, but proper rotation transmission becomes impossible
Solution Approach 1:
The belt tensioning device acts as an intermediary mechanism that maintains appropriate tension on the belt without causing excessive force that would displace the pulleys. This intermediary function ensures proper rotation transmission while preventing belt meandering and alignment issues.
Solution Approach 2:
The bearing structure provides self-aligning capabilities through its design, where the first and second bearing parts automatically maintain the correct positional relationship between driving and driven pulleys during operation, eliminating the need for complex external alignment maintenance mechanisms.
3Reliability
If the driven pulley moves closer to the driving pulley due to belt tension, then alignment is broken, but rotation transmission continues
Solution Approach 1:
By separating the support functions into two distinct bearing parts, each optimized for its specific pulley, the system prevents the coupled movement that occurs when a single bearing structure supports both pulleys. This segmentation maintains manufacturing precision while ensuring continuous rotation transmission.
Solution Approach 2:
Each bearing part is designed with specific local characteristics optimized for its respective pulley - the first bearing part for the driving pulley and the second bearing part for the driven pulley. This localized optimization ensures that each pulley maintains its correct position and orientation, preventing alignment breakdown while enabling reliable rotation transmission.
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
The mechanism ensures accurate alignment and stable rotation of the photosensitive drum by maintaining pulley alignment and preventing misalignment, reducing defects in the bearing structure and ensuring smooth operation.
Implementation Method 1
the belt is applied with a predetermined tension
Implementation Method 2
The bearing structure includes a first bearing part and a second bearing part
Data Source
AI summary
A belt driving mechanism rotates a rotating body provided in a rotating device around a transmission shaft, and includes a driving device provided adjacent to the rotating device and a bearing structure supporting the transmission shaft extending from the rotating device to the driving device through the support frame. The driving device includes a housing, a fixed frame, a driving pulley, a driven pulley, a belt and a circumference correction part. The housing is fixed to the support frame. The fixed frame is fixed in the housing. The driven pulley is fixed to the transmission shaft. The belt is wound around the driving pulley and the driven pulley. The bearing structure includes a first bearing part provided in the fixed frame and the second bearing part provided in the housing on an opposite side to the first bearing part with respect to the driven pulley.