Lift Cage Door Blocking Mechanism Vibration Control
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Solution Overview
Problem
Existing lift cage door mechanisms experience vibrations and noise due to misalignment issues between cage doors and landing doors, leading to perceived poor resistance and quality.
Innovation Solution
A separate and independent second motor element and blocking/releasing carriage system, with irreversible kinematic coupling, is used to control the chute blocking and releasing mechanism, ensuring precise alignment and preventing accidental disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If motor means control both door movement and blocking/releasing mechanisms through the same transmission belt, then device complexity is reduced, but vibrations and noise occur due to misalignment between doors
Solution Approach 1:
The control system is segmented into two independent parts: a first motor element for door movement control and a second motor element for blocking/releasing mechanism control. This segmentation allows each motor to operate independently, eliminating the vibrations and noise caused by misalignment that occur when both functions share a single transmission belt.
2Ease of operation
If a single transmission belt controls both doors and blocking/releasing means, then ease of operation is improved, but manufacturing precision requirements increase due to alignment sensitivity
Solution Approach 1:
By dividing the control into two separate motor elements, the system eliminates the need for precise alignment between the transmission belt and blocking/releasing means. Each motor element can be independently positioned and adjusted, significantly reducing manufacturing precision requirements while maintaining ease of operation.
3Productivity
If motor means activate blocking/releasing means after drawing doors closed, then productivity is improved, but reliability decreases due to accidental disengagement risk
Solution Approach 1:
The blocking/releasing mechanism is activated by a separate second motor element that operates independently and can be precisely controlled. This allows the blocking action to be performed as a preliminary step before door closing, or in a precisely controlled sequence, eliminating the risk of accidental disengagement that occurs when activation is delayed until after door closure.
Solution Approach 2:
The independent second motor element for blocking/releasing control enables precise feedback control of the blocking mechanism. The system can monitor the blocking status and adjust the second motor element's operation to ensure reliable engagement, maintaining productivity while improving reliability through active monitoring and adjustment.
Data Source
AI summary
Lift cages are provided which include a crosspiece which houses drive mechanisms, an access aperture and two cage doors which are operatively connected to a first motor element which moves the cage doors from an open position to a closed position. Such cage doors may include a second motor element mechanically and operatively separate from the first motor element, wherein said second motor element is connected to a blocking/releasing carriage of the cage doors. The blocking/releasing carriage may be connected to at least one chute connected to at least one of said cage doors, so as to permit the blocking/releasing of the chutes independently of the actuation of the first motor element and of the cage doors.