Hollow Column Pulley System for Functional Trainer
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Solution Overview
Problem
Existing functional trainer exercise machines have awkward and prone-to-damage pulley systems due to externally exposed components, making height adjustments cumbersome and vulnerable to damage.
Innovation Solution
A functional trainer exercise machine design featuring a hollow column with an internal track and pulley carriage assembly, where the pulley carriage and indexing plate are internally mounted, and a spring-loaded indexing pull pin is used for height adjustment, with a pulley cover that guards the pulleys and operates the indexing pin, eliminating the need for external retaining hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pulley components are externally exposed for easy access, then ease of operation is improved, but reliability deteriorates due to susceptibility to damage
Solution Approach 1:
The pulley carriage assembly is nested inside the hollow column, with the pulley system contained within the internal channel. This nesting protects the pulleys from external damage while maintaining operational functionality through the internal track system.
Solution Approach 2:
The pulley cover acts as an intermediary element that provides controlled access to the pulley system. It protects the pulleys from direct exposure while allowing the indexing pull pin to operate through it for height adjustment.
2Ease of operation
If indexing components are externally exposed for simple adjustment, then ease of operation is improved, but device complexity increases due to external retaining hardware
Solution Approach 1:
The indexing pull pin is integrated with the pulley cover, combining the adjustment mechanism with the protective cover. This eliminates the need for separate external retaining hardware while maintaining simple operation through the spring-loaded pin system.
Solution Approach 2:
The spring-loaded indexing pull pin automatically engages with indexing holes to secure the pulley carriage at selected heights. The system self-secures without requiring external retaining hardware, reducing overall device complexity.
3Reliability
If pulley carriage is internally mounted for protection, then reliability is improved, but ease of operation deteriorates due to adjustment difficulty
Solution Approach 1:
The pulley cover serves as an intermediary that provides controlled access to the internally mounted pulley carriage. It allows the indexing pull pin to extend and engage with indexing holes for height adjustment while maintaining protection when closed.
Solution Approach 2:
The indexing pull pin is extracted through the pulley cover to engage with the indexing plate, allowing adjustment operation from the external side while keeping the pulley carriage internally protected within the column.
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
This design provides clean aesthetics, ease of adjustment, and protection of pulleys from damage, enhancing user experience and machine durability by hiding critical components within the column.
Implementation Method 1
a spring-loaded indexing pull pin is used for height adjustment
Data Source
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AI summary
The invention relates to an exercise machine, comprising: a stationary frame (12) comprising first and second side frames (18), whereby each side frame (18) has upper and lower frame portions or members (50, 48), respectively; first and second columns (20) are rotationally mounted between forward end portions of the upper and lower members (50, 48) of the respective side frames, wherein each column is at least substantially hollow with an internal channel and one or more vertical guide tracks 76 inside the channel or column; first and second pulley carriage assemblies (22) mounted in the respective channels for travel along the vertical tracks (76) inside the columns.