Crank Handle Assembly Segmentation and Composite Materials
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Solution Overview
Problem
Existing crank designs for trailers and hopper doors are inefficient due to the tendency of metal handles to catch and rust, making the rotational process labor-intensive and difficult.
Innovation Solution
A crank handle assembly featuring an aluminum elongated extension member with a Delrin rotatable handle member and snap rings, which can be retrofitted or used on new cranks, ensuring smooth operation by preventing rust and allowing free rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal collar and metal handle are crimped together, then structural strength is improved, but the handle portion does not spin freely and catches during rotation
Solution Approach 1:
The handle assembly is divided into separate components: a collar portion that attaches to the crank shaft, and a handle portion that rotates independently. This segmentation allows each part to perform its specific function - the collar provides structural connection while the handle portion provides smooth rotation without catching on other components.
2Reliability
If metal handle is used, then durability is improved, but rust occurs making the process labor-intensive
Solution Approach 1:
The handle assembly uses composite material construction with a metal collar portion for structural strength and attachment, combined with a handle portion made of non-metallic or corrosion-resistant material. This composite approach maintains durability while preventing rust, ensuring the handle can be operated easily without corrosion-related friction or failure.
3Ease of manufacture
If existing crank design is used, then manufacturing simplicity is maintained, but the rotational process is time-consuming and labor-intensive
Solution Approach 1:
The crank handle is segmented into a collar portion and handle portion that can be assembled separately onto the crank shaft. This segmentation allows for simple manufacturing of individual components while enabling smooth rotation during operation, thereby improving operational efficiency without significantly complicating the manufacturing process.
Data Source
AI summary
In combination with a crank assembly, the improvement comprising an apparatus for improving operation of the crank assembly. The apparatus includes an elongated extension member having each of a predetermined shape, a first predetermined length and formed of a first predetermined material, such predetermined shape includes a projection on one end thereof for engagement with one end of the crank assembly. A rotatable handle member is disposed around at least a portion of the elongated extension member, such rotatable handle member having a second predetermined length and formed of a second predetermined material. There is a means for securing the rotatable handle member to the elongated handle member.