Elevator Door Interlock Shim Assembly for Narrow-Space Maintenance
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Solution Overview
Problem
Existing door interlock mechanisms for elevators face challenges in ease of mounting and removing parts, particularly in narrow spaces, leading to potential dropping of components during maintenance, and may not effectively absorb dimension errors between manufacturing parts.
Innovation Solution
A door interlock design featuring a locking member with a slit, a sim member inserted into the slit, and multiple fixing members to securely attach the mounting member and sim member to the locking member, including a support member to prevent deformation and improve stiffness, allowing for easy assembly and disassembly while preventing the sim member from dropping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mounting member is designed with a slit and sim member to absorb dimension errors, then the manufacturing precision is improved, but the device complexity increases due to additional components
Solution Approach 1:
The mounting member is divided into multiple components: the mounting member itself, a sim member inserted into a slit of the mounting member, and a locking member. This segmentation allows each component to be manufactured separately with standard tolerances, and the assembly absorbs dimension errors through the slit-sim member interface, resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The sim member acts as an intermediary element between the mounting member and the locking member. It is inserted into the slit of the mounting member and secured by the locking member, serving as a mediator that absorbs dimension errors while maintaining a relatively simple overall structure.
2Reliability
If multiple fixing members are used to secure the sim member, then the reliability of the locking mechanism is improved, but the ease of manufacture deteriorates due to increased assembly steps
Solution Approach 1:
The locking member is designed to perform multiple functions: it engages with the engaged part to lock the door, and simultaneously secures the sim member to the mounting member by inserting into the slit. This preliminary design of the locking member to handle both locking and fixation tasks reduces the need for additional fixing members, improving ease of manufacture while maintaining reliability.
3Reliability
If the locking mechanism is designed for secure engagement, then the reliability is improved, but the ease of operation deteriorates in narrow spaces during maintenance
Solution Approach 1:
The locking mechanism is segmented into independently removable components: the mounting member can be removed from the platform, and the sim member can be removed from the locking member. This segmentation allows maintenance personnel to access and remove components in narrow spaces step by step, improving ease of operation while maintaining the secure engagement of the locking mechanism during normal operation.
Data Source
AI summary
A door interlock of the present invention includes an engaged part and an engaging part configured to lock a door in a door closed state. The engaging part includes: a locking member; a mounting member mounted to the locking member; a sim member inserted into a slit; a first fixing member; and a second fixing member. The first fixing member is configured to be inserted into a first lock through hole, a first sim through hole, and a mount through hole, thereby fixing the mounting member and the sim member to the locking member. The second fixing member is configured to be inserted into a second lock through hole and a second sim through hole, thereby fixing the sim member to the locking member.