Multi-Arm Linkage Assembly for Compact Straight-Line Motion Conversion
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Solution Overview
Problem
Existing mechanisms for converting rotational motion into straight line motion are not compact enough, leading to inefficient use of space and reduced load-bearing capacity, particularly in applications requiring stability and versatility.
Innovation Solution
A modified assembly comprising a first and second arm rotatable about fixed pivots, a third arm pivotably connected to the second arm, and connecting arms, with a locking assembly that increases rigidity and stability by locking arms at specific positions, allowing for a compact and efficient conversion of rotational motion into straight line motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If existing straight line mechanisms are used, then rotational motion can be converted to straight line motion, but the mechanisms are not compact and occupy excessive space
Solution Approach 1:
The mechanism employs nested arms where the third arm is pivotably connected to the second arm, and connecting arms are arranged to nest within each other during operation. This nesting arrangement allows the mechanism to achieve compact configuration while maintaining the full range of motion required for converting rotational motion to straight line motion, directly resolving the space occupation issue.
2Strength
If existing straight line mechanisms are used, then motion conversion is possible, but load-bearing capacity is reduced
Solution Approach 1:
The mechanism is divided into multiple segmented arms (first arm, second arm, third arm) and connecting arms that work together through pivotable connections. This segmentation allows each component to be optimized for strength while maintaining overall structural efficiency, enabling the mechanism to handle higher loads without requiring excessive structural complexity.
Solution Approach 2:
The mechanism utilizes multi-dimensional spatial arrangement with arms extending in different directions and pivotable connections operating in multiple planes. This dimensional approach distributes mechanical stresses more effectively across the structure, enhancing load-bearing capacity without proportionally increasing structural complexity.
3Stability of the object's composition
If existing straight line mechanisms are used, then motion conversion is achieved, but stability is insufficient
Solution Approach 1:
The locking mechanism is designed to automatically engage at predetermined positions during the motion cycle, providing preliminary stabilization before the mechanism reaches critical operational phases. This preliminary locking action enhances stability without requiring continuous complex control mechanisms.
Solution Approach 2:
The locking mechanism operates autonomously, utilizing the mechanical energy and motion of the mechanism itself to engage and disengage the locks at appropriate positions. This self-service approach provides enhanced stability without adding external control systems or increasing overall device complexity.
Data Source
AI summary
An assembly for converting motion comprises a first arm and a second arm rotatable about first and second fixed pivots; a third arm pivotably connected to the second arm; a first connecting arm pivotably connected to and extending between the first arm and the third arm; a second connecting arm pivotably connected to and extending between the first arm and the second arm; and a locking assembly comprising a first locking member and a second locking member, the first locking member connected to one of the arms and engaging with the second locking member at one or more positions from the retracted position to the extended position. The assembly may comprise the guide assembly comprising a guide member and an engagement member moveably engageable with the guide member.