Apparatus for converting motion
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Solution Overview
Problem
Existing mechanisms for converting rotational motion into straight line motion are often bulky and inefficient, lacking in compactness and versatility, particularly when used in applications requiring precise linear movement of components in a straight line.
Innovation Solution
A compact assembly comprising a series of interconnected 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 efficient conversion of rotational motion into linear motion with minimal deviation from a straight line, enabling the assembly to be compactly configured and versatile in application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If existing mechanisms for converting rotational motion into straight line motion are used, then motion conversion is achieved, but the mechanisms are bulky and lack compactness
Solution Approach 1:
The mechanism employs nested arms where the third arm is positioned within the arc of the first and second arms, allowing the structure to fold compactly while maintaining the full range of motion required for straight line conversion
Solution Approach 2:
The invention transitions from planar multi-lever mechanisms to a three-dimensional arrangement of arms rotating about fixed pivots, achieving compactness by utilizing spatial configuration rather than flat linkage expansion
2Manufacturing precision
If existing straight line mechanisms are used, then motion conversion is achieved, but they lack efficiency in producing precise linear movement
Solution Approach 1:
The mechanism optimizes the parameters of arm lengths and pivot positions to ensure that the third arm traces a path with minimal deviation from a straight line, achieving both precision and efficiency through carefully selected geometric parameters
Solution Approach 2:
The mechanism uses dynamic rotation of arms about fixed pivots rather than static linkages, allowing continuous motion adjustment to maintain optimal straight line trajectory throughout the range of motion
Data Source
Figure 1
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AI summary
An assembly for converting motion is provided, the assembly comprising a first arm (8) rotatable at a first position thereon about a first fixed pivot; a second arm (10) rotatable at a first position thereon about a second fixed pivot, the second fixed pivot spaced apart from the first fixed pivot; a third arm (12) pivotably connected at a first position thereon to the second arm at a second position on the second arm, the second position spaced apart from the first position on the second arm; a fourth arm (16) pivotably connected at a first position thereon to a second position on the first arm (8) spaced apart from the first position and pivotably connected at a second position thereon spaced apart from the first position thereon to the third arm (12) at second position on the third arm spaced apart from the first position; a connecting arm (22) extending between the first arm and the second arm, the second connecting arm pivotably connected to a third position on the first arm (8) disposed between the first and second positions thereon and pivotably connected to a third position on the second arm (10); and a support arm (26) pivotably connected at a first position thereon to a third position on the fourth arm (16), the third position on the fourth arm being spaced from the first and second positions thereon and beyond the second position in the direction from the first position to the second position.