Nested Parallel-Link Arm Support to Block Foreign Material
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Solution Overview
Problem
The arm-type support device allows foreign material to enter due to the wide space formed by the parallel link configuration, which is a limitation in maintaining cleanliness and operational efficiency, especially in environments where foreign materials are easily accessible.
Innovation Solution
The design incorporates a hollow first arm member that accommodates the second arm member, forming a parallel link with pivotally connected ends, and an actuator with a driving unit and link member to control the movement of the frames, ensuring that the second arm member pivots within the first arm member, minimizing the gap and preventing foreign material entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the parallel link configuration with spaced arm members is used, then the actuator can effectively balance weight and pivot frames, but wide spaces are formed allowing foreign material to enter the device
Solution Approach 1:
The second arm member is nested inside the hollow first arm member, creating a telescopic structure where one component is placed within another. This nesting arrangement eliminates the wide spaces between parallel components while maintaining the parallel link's weight balancing function, as the inner arm member can move within the outer arm member's hollow space.
Solution Approach 2:
The design transitions from a two-dimensional parallel arrangement (two separate arm members side by side) to a three-dimensional nested arrangement (one arm member inside another hollow arm member). This dimensional change allows the actuator to remain functional while eliminating gaps that would allow foreign material entry.
2Device complexity
If the arm member is made hollow to accommodate the actuator, then the device complexity is reduced, but the structural strength may be compromised
Solution Approach 1:
The hollow first arm member accommodates both the actuator and the second arm member within its internal space. This nested configuration integrates multiple components into a single structural element, reducing overall device complexity while the hollow tube structure maintains sufficient strength through its geometric configuration.
Solution Approach 2:
The first arm member serves multiple functions: it provides structural support, contains the actuator, houses the second arm member, and maintains the parallel link geometry. This multi-functionality reduces the need for separate protective housings or additional structural components.
Data Source
AI summary
An arm-type support device includes a first frame, a second frame, a first arm member, a second arm member, and an actuator. The actuator includes a driving unit, an actuating rod, and a link member. The first arm member, the second arm member, the first frame, and the second frame form a parallel link. The first arm member is hollow and accommodates the actuator and the second arm member.