Five-Arm Linkage Assembly for Compact Straight-Line Motion Conversion
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Solution Overview
Problem
There is a need for an improved assembly that can convert rotational motion into straight line motion in a compact form, efficiently occupying a small volume of space, while maintaining a high degree of accuracy and versatility in applications such as building structures and solar panel deployment.
Innovation Solution
The assembly consists of five levers or arms with pivoted connections, where rotation of the first and second arms about their fixed pivots results in a straight line motion of a point on the third arm, allowing for compact configuration and versatile movement, including perpendicular displacement and rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional multi-lever straight line mechanisms are used, then straight line motion can be produced, but the device occupies a large volume of space
Solution Approach 1:
The mechanism employs nested arms where the third arm is positioned within the arc swept by the first and second arms. The arms are arranged concentrically around the fixed pivots, with the third arm's movement path nested within the larger arcs of the first and second arms, achieving compact spatial configuration while maintaining straight line motion accuracy
Solution Approach 2:
The mechanism transitions from planar linkage to three-dimensional spatial arrangement by positioning the third arm vertically or radially within the arc space of the first and second arms. This dimensional reorganization allows the mechanism to occupy minimal ground area while preserving the straight line motion function
2Volume of moving object
If compact configuration is achieved, then space is efficiently occupied, but the mechanism complexity increases
Solution Approach 1:
The first and second arms serve multiple functions: they define the fixed pivots, sweep arcs that contain the third arm, provide structural support, and their relative angular displacement directly controls the straight line motion of the third arm. This multi-functionality reduces the need for additional control mechanisms
Solution Approach 2:
The mechanism merges the functions of motion generation and spatial containment into a unified structure where the arcs swept by the first and second arms simultaneously serve as both the motion path definition and the spatial boundary that nests the third arm, eliminating the need for separate guiding structures
Data Source
AI summary
An assembly for converting motion, the assembly comprising a first arm rotatable about a first fixed pivot; a second arm rotatable about a second fixed pivot, the second fixed pivot spaced apart from the first fixed pivot; a third arm pivotably connected to the second arm; a first connecting arm extending between the first arm and the third arm, the first connecting arm pivotably connected to the first arm spaced and pivotably connected to the third arm; and a second connecting arm extending between the first arm and the second arm, the second connecting arm pivotably connected to the first arm and pivotably connected to the second arm. The assembly finds use in supporting and moving components of a building. In one embodiment, the assembly finds use in deploying a solar panel array.