Cam Wheel Assembly Wear Reduction via Multi-Point Guide Rods
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Solution Overview
Problem
Existing cam wheel assemblies in hinge structures suffer from durability issues due to rapid wear of the center mounting hole periphery, leading to shortened lifespan and instability, and occupy excessive space with radially extending mounting portions that compromise connection strength.
Innovation Solution
A high-durability cam wheel assembly design featuring a fixed member with symmetrically disposed first interference members and guide rods with smoothly arched outer walls, and a movable member with corresponding sliding grooves, which increases contact area and prevents tilting, ensuring balanced rotation and even pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bearing force is concentrated on the periphery of the center mounting hole, then the structure is simple, but the periphery wears quickly and durability is reduced
Solution Approach 1:
The patent divides the load-bearing function into multiple contact points by introducing guide rods with arched outer walls that contact the center axle hole at multiple locations, distributing the bearing force across several contact points rather than concentrating it at a single periphery location, thereby reducing wear and improving durability
Solution Approach 2:
The patent transitions from a single-point contact mechanism to a multi-point contact mechanism by adding guide rods with arched surfaces, effectively adding a dimensional aspect to the load distribution and spreading the bearing force across multiple spatial locations
2Ease of operation
If a radially extending mounting portion is used, then the connection is achieved, but the space occupation increases and connection strength is compromised
Solution Approach 1:
The patent removes the radially extending mounting portion from the fixed member and replaces it with mounting lugs positioned at the periphery, extracting the unnecessary radial extension and relocating the mounting function to a more space-efficient peripheral position
Solution Approach 2:
Instead of extending mounting portions radially inward from the periphery, the patent inverts the approach by positioning mounting lugs at the periphery and extending them outward, thereby reducing space occupation while maintaining connection capability
3Ease of operation
If a pin is used for fastening, then the connection is achieved, but the connection strength is insufficient
Solution Approach 1:
The patent merges the fastening function with the mounting structure by integrating mounting lugs that work in conjunction with corresponding mounting holes, creating a combined fastening-mountain system that provides stronger connection than a separate pin could achieve
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly extends the cam wheel assembly's lifespan by reducing wear and maintaining stability through balanced rotation and even pressure distribution, while minimizing space occupation and enhancing connection strength.
Implementation Method 1
The guide rods each have a smoothly arched outer wall fitting and disposed in contact with the circular periphery of the center axle hole of the fixed member
Implementation Method 2
A hinged structure for the aforesaid application uses two interference members, for example, friction members or cam wheel members for causing a torsional friction force upon rotation of the movable member relative to the fixed member
Data Source
AI summary
Disclosed is a high-durability cam wheel assembly, which includes a fixed member, which has a center axle hole and one pair of first interference members symmetrically disposed at one side thereof, and a movable member, which has a center mounting hole axially aimed at the center axle hole of the fixed member, a pair of guide axially symmetrically extending from one side of the periphery of the center mounting hole and inserted into the center axle hole of the fixed member for guiding rotation of the movable member relative to the fixed member, and a pair of second interference member arranged on one side thereof around the guide rods and the center mounting hole and disposed in contact with the first interference members of the fixed member for causing a torsional force upon rotation of the movable member relative to the fixed member through an angle.