Bearing Plate Torque Locking Cam for Roller Shaft Repair
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Solution Overview
Problem
Existing bearing plates for winding shafts in window curtains require complete dismantling of the roller shutter box to rotate the shaft for repairs, which is laborious and often impossible when the drive motor is defective or mechanically blocked.
Innovation Solution
A bearing plate design where the motor bearing is held rotatably in a component receptacle with a locking cam mechanism, allowing for manual release of torque support, enabling the winding shaft to be rotated manually for repair by unlocking the locking cam, allowing the shaft to be turned at both ends in the bearing plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bearing component is fixed non-rotatably in the bearing plate, then the motor can transmit torque to the winding shaft, but the winding shaft cannot be rotated manually for repair work
Solution Approach 1:
The bearing component is designed to be dynamically changeable between two states: locked (non-rotatable) during normal operation to ensure reliable torque transmission, and unlocked (rotatable) during repair work to enable manual rotation. This dynamic state change resolves the contradiction between maintaining reliable torque transmission and enabling ease of repair.
2Ease of repair
If the bearing component is axially released from the receptacle, then the winding shaft can be rotated, but the roller shutter box must be completely dismantled
Solution Approach 1:
The locking function is extracted from the bearing plate structure and transferred to a separate locking cam mechanism on the bearing component. This allows the bearing component to be unlocked and rotated independently without requiring dismantling of the bearing plate or roller shutter box, thereby reducing device complexity while maintaining ease of repair.
3Reliability
If a locking mechanism is added to the bearing component, then the bearing component can be locked non-rotatably, but the structure becomes more complex
Solution Approach 1:
The locking cam is designed to be actuated by a simple axial force applied during assembly or maintenance, allowing the bearing component to lock itself non-rotatably without requiring complex external locking mechanisms. The spring-loaded design enables automatic engagement and disengagement, maintaining reliability while minimizing structural complexity.
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
Facilitates easier and simpler repair work by allowing manual rotation of the winding shaft without disassembling the roller shutter box, enabling the window curtain to be unwound and the shaft replaced without needing to dismantle the entire system.
Implementation Method 1
The detent cam is expediently acted upon by a force in its detent position by a spring, ie it is urged into the detent position by the spring
Implementation Method 2
The latching cam is held guided in a guide of the bearing component and engages in a radial latching opening provided in the edge of the component receptacle
Implementation Method 3
if, on the other hand, the locking cam is released from the locking mechanism, the bearing component can rotate in the component holder
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The bearing plate (10) has a drive motor for driving a winding shaft. An end of the winding shaft is rotatably supported in a pivot bearing, and another end of the winding shaft is held in the bearing plate with an engine mount supporting the drive torque. The engine mount has a bearing component (20), which is a component that is separated from the bearing plate. The bearing component is rotatably supported in a component receptacle (11) of the bearing plate and is locked in the component receptacle through a detent cam (44) in a torque-proof manner.