Low-floor Treadmill Rear Roller with Internal Bearings
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Solution Overview
Problem
Existing low-floor treadmills face issues with increased friction from fixed guide plates affecting belt durability and motor overload, and space constraints due to large bearings required for guide rollers, making them less durable and less space-efficient.
Innovation Solution
A low-floor treadmill design featuring a smaller rear roller with internally arranged bearings on a coaxial spindle, supported by cam followers and a lightweight support board with a plastic or silicon-coated surface, reduces friction and prevents bending, enhancing durability and space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed guide plate is used to reduce friction, then the belt durability is improved, but the driving motor becomes overloaded
Solution Approach 1:
The patent replaces the fixed guide plate mechanical system with a roller guide system that uses rolling friction instead of sliding friction. This substitution reduces the frictional resistance by approximately 1/10th compared to the guide plate, thereby reducing the load on the driving motor while maintaining belt durability through the roller support mechanism
2Reliability
If big bearings are used to support the guide roller axis, then the roller durability is improved, but the space required increases
Solution Approach 1:
The patent embeds multiple small bearings inside the rear roller, arranging them in a nested configuration where the bearings are positioned within the roller's internal structure. This allows the roller to be supported by multiple small bearings rather than requiring large external bearings, significantly reducing the space required while maintaining or improving durability through distributed load support
Solution Approach 2:
The patent divides the support function into multiple small bearings arranged at intervals within the rear roller, rather than using a single large bearing. This segmentation of the support mechanism allows for reduced individual bearing sizes while collectively providing sufficient support, thereby reducing the overall space required in the treadmill structure
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 improves the durability and space-saving capabilities of the rear roller, prevents bending, and reduces the load on the driving unit, allowing for easier user access and reduced frictional resistance.
Implementation Method 1
a plurality of bearings are arranged inside the rear roller and the bearings are fit in a coaxial spindle, and the rear roller is supported by said bearings to improve durability of the rea roller
Data Source
AI summary
[Problem] This invention provides a smaller size and space-saving low-floor treadmill which is improved in durability of support of the rea roller and which can prevent bending of the rear roller by using smaller sized roller in the rea roller for a moving belt of the low-floor treadmill.[Means to Solve the problem] A low-floor treadmill having a running surface of a moving belt having a lower height from a floor, comprising the moving belt running in an endless manner between a front roller and a rea roller, the moving belt being driven by the front roller which is connected to a driving unit and being pressed down by a pressing roller to form a horizontal running surface, the moving belt being reversed after the rea end of the running surface at the rear roller positioned at a lower level from a floor, the moving belt being returned along the floor back to the front roller, characterized in that a plurality of bearings are arranged inside the rear roller and the bearings are fit in a coaxial spindle, and the rear roller is supported by said bearings to improve durability of the rea roller.