Winch Assembly Housing Design for Concentric Strap Rotation
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Solution Overview
Problem
Existing winch assemblies lack a housing to encase moving parts, leading to exposure to elements and increased wear, and often require complex and costly manufacturing processes, with issues like eccentric strap rotation and difficult mounting due to internal components.
Innovation Solution
A winch assembly with a housing formed by two members that encase a drive system and winch drum, using die-cast materials for strength and aesthetics, eliminating the need for a strap bolt and simplifying assembly with integrated strap guides and centralized ratchet and pawl systems for improved accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a housing is added to encase moving parts, then protection and aesthetics are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the housing with the drum assembly by forming the housing as an integral part of the drum structure. This merging eliminates the need for separate housing components and reduces assembly complexity while still providing protection for moving parts.
Solution Approach 2:
The drum assembly serves multiple functions: it acts as both the winding drum and the housing structure. This multi-functionality reduces the number of separate components needed, simplifying manufacturing while maintaining protective enclosure for internal mechanisms.
2Ease of manufacture
If a strap bolt is used to assemble the strap to the drum, then assembly is simplified, but mechanical performance deteriorates due to eccentric strap rotation
Solution Approach 1:
The patent removes the strap bolt from the drum assembly, extracting the problematic component that caused eccentric strap rotation. The strap is instead attached directly to the drum hub, eliminating the bump that created mechanical disadvantage and ensuring concentric strap rotation.
3Ease of manufacture
If fasteners are installed through the inside of the winch assembly, then mounting is achieved, but ease of operation deteriorates due to limited accessibility
Solution Approach 1:
The patent inverts the traditional mounting approach by providing external mounting holes on the housing rather than internal holes requiring access from the inside. This allows fasteners to be installed from the outside, eliminating the need to disassemble the winch assembly for mounting operations.
Data Source
AI summary
A winch assembly is described and shown herein. The winch assembly may include a first housing member having a first retaining member formed therein and a second housing member having a second retaining member formed therein, the second housing member secured to the first housing member forming a winch housing. The winch assembly may further include a drive system generally positioned within the winch housing, and a winch drum operatively coupled with the drive system and rotationally secured with the first and second retaining members.