Drum Rotating Device Coaxial Alignment via Driving Shaft
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Solution Overview
Problem
Conventional drum rotating devices have complex structures that often result in offset rotation axes between the drum and the driving shaft, leading to unstable rotation due to separate support arrangements and potential misalignment.
Innovation Solution
A drum rotating device with a simple structure where the driving device, including a motor and decelerator, is fixed to a frame at one end of the drum, and the driving shaft is rotatably supported by the frame, ensuring the drum is fixedly attached to the driving shaft, maintaining coaxial alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate support arrangements are used to support the driving device and the drum, then the drum can rotate freely, but the structure becomes complicated and the rotation axis may be offset
Solution Approach 1:
The patent merges the support functions by having the driving device support the drum directly through the driving shaft passing through the drum's rotation axis. The drum is supported at both ends by the driving shaft, which is itself supported by the driving device housing, eliminating the need for separate support arrangements while maintaining free rotation capability
2Ease of operation
If the drum is supported at both ends by separate arrangements, then the drum can rotate freely, but the rotation axis becomes offset from the driving shaft center
Solution Approach 1:
The driving shaft serves as an intermediary element that directly connects the drum to the driving device housing. By having the driving shaft pass through the drum's rotation axis and be supported by the housing, it mediates between the drum and housing to ensure precise coaxial alignment while allowing free rotation
3Ease of manufacture
If the drum shaft positional accuracy is low, then installation is easier, but the rotation axis becomes offset causing unstable rotation
Solution Approach 1:
The patent incorporates beforehand cushioning by providing adjustment mechanisms and tolerance compensation features in the driving shaft support structure. The bearing support arrangement includes provisions for adjusting the driving shaft position to compensate for manufacturing tolerances, ensuring stable rotation even when shaft positional accuracy is not extremely high
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 stable and efficient rotation of the drum with reduced risk of axis misalignment, enabling effective use of space and allowing the motor's power to be utilized for other purposes beyond drum rotation.
Implementation Method 1
The driving shaft of the driving device is rotatably supported by the frame via a bearing
Data Source
AI summary
A drum rotating device enables a drum and a driving device mounted in the drum to be supported with a simple structure and which reduces the possibility that the driving shaft of the driving device may be offset with respect to the rotation axis of the drum. The drum rotation device includes the drum and the driving device arranged to drive and rotate the drum. The drum includes an outer cylinder, an inner cylinder arranged inside the outer cylinder coaxially therewith, and a support wall arranged to connect the outer and inner cylinders to each other at an approximately intermediate portion in the axial direction. The outer and inner cylinders are substantially cylindrical. The driving device is fixed to a frame at one axial end. The driving shaft of the driving device extends through the drum and is rotatably supported by the frame through a bearing at the other axial end. The driving shaft is arranged to extend through the inner cylinder, thereby being fixedly attached the drum so that the drum and the driving shaft can rotate together.