Elliptical Trainer Adjusting Structure with Nested Protective Cover
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Solution Overview
Problem
Conventional elliptical trainer adjusting structures have long connecting pieces and components that are prone to damage and exposed to dust, leading to operational difficulties and reduced service life.
Innovation Solution
The adjusting structure features rotatable posts, driving rods, a rotating device with shafts and adjusters, and a protective cover with arcuate slots and limiting stems, allowing for smooth adjustment and protection from dust, with a hollow tube and fitting sleeve facilitating easy track adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the connecting length of each connecting piece, adjuster, and pull pin is increased to allow for adjustment, then the adjustability is improved, but the components are prone to damage and the reliability deteriorates
Solution Approach 1:
The pull pin is nested within the hollow tube, and the hollow tube is nested within the hollow fitting sleeve. This nested structure allows the components to be compact while maintaining the necessary adjustment length, reducing the risk of damage while preserving adjustability.
Solution Approach 2:
The hollow tube and hollow fitting sleeve act as intermediary protective structures between the pull pin and the external environment. These intermediaries protect the pull pin from damage while still allowing it to perform its adjustment function through the arcuate slots.
2Ease of operation
If the connecting pieces and adjusters are exposed for adjustment operation, then the ease of operation is improved, but dust enters the gaps and the reliability deteriorates
Solution Approach 1:
The hollow tube and hollow fitting sleeve act as protective shells that enclose the pull pin and adjustment mechanism. These shells prevent dust from entering the gaps while still allowing the adjustment operation to proceed through the arcuate slots, thus protecting the components without compromising ease of operation.
3Reliability
If the connecting length of components is reduced for compactness, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The adjustment mechanism uses arcuate slots that provide a guided path for the limiting stems, allowing smooth adjustment motion within a compact structure. This dimensional approach to the adjustment path enables compact component length while maintaining ease of operation through the curved slot geometry.
Data Source
AI summary
An adjusting structure of an elliptical trainer contains: a base including an upright column, two rotatable posts rotatably connected with the upright column, two driving rods rotatably coupled with the two rotatable posts, a rotating device mounted on the base, and two shafts fixed on two side surfaces of the rotating device. Each shaft is in connection with an adjuster which has a fixing disc, an adjustment disc, and a positioning element. The fixing disc has a plurality of first orifices and a plurality of limiting stems. The adjustment disc has two opposite arcuate slots, a first hole, and a hollow tube. The positioning element is inserted into one of the plurality of first orifices via the hollow tube and the first hole, a hollow fitting sleeve is fitted with the hollow tube, and the hollow fitting sleeve is fitted with each driving rod.