Treadmill Transmission System with Movable Magnetic Resistance
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Solution Overview
Problem
Existing treadmills lack the ability to adjust exercise resistance effectively, failing to meet user demands for varying exercise intensity.
Innovation Solution
A transmission system comprising a primary and secondary transmission wheel, a metal disk, and a magnetic assembly, where the magnetic assembly is movable to provide resistance, connected to a handle for user control, allowing for adjustable resistance levels by altering the magnetic force on the metal disk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a magnetic assembly is used to provide resistance to the metal disk, then exercise resistance can be adjusted, but the device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical friction-based resistance mechanisms with a magnetic resistance system. The magnetic assembly generates magnetic fields that interact with the metal disk to provide adjustable resistance without physical contact, eliminating the need for complex mechanical friction components and enabling smooth resistance adjustment.
Solution Approach 2:
The metal disk acts as an intermediary between the primary transmission wheel and the magnetic assembly. It transfers rotational motion from the transmission system while interacting with the magnetic field to generate resistance, allowing the magnetic assembly to be positioned away from the center without directly interfering with the transmission path.
2Force
If the magnetic assembly is positioned close to the metal disk center, then significant resistance can be generated, but the magnetic force requirement increases
Solution Approach 1:
The patent segments the resistance generation function into two parts: the metal disk handles the force multiplication through its rotational inertia and lever arm effect, while the magnetic assembly provides a relatively weak magnetic field. This segmentation allows the magnetic assembly to be positioned away from the center without requiring excessive magnetic force, as the metal disk amplifies the resistance effect.
Solution Approach 2:
The patent moves the magnetic assembly from a central position to a lateral position away from the metal disk center. This positional change in another dimension (lateral displacement) allows the system to generate significant resistance through the combined effect of magnetic force and the metal disk's rotational mechanics without requiring the magnetic assembly to be directly coupled to the rotation axis.
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
Enables users to customize exercise intensity by changing resistance, enhancing training effectiveness through a multi-level transmission system that provides significant resistance without requiring excessive magnetic force.
Implementation Method 1
the magnetic assembly is movably close to or away from a center of the metal disk to provide a resistance to the metal disk
Implementation Method 2
the second rotating shaft is connected with the secondary transmission wheel through a one-way bearing
Data Source
Figure 1
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AI summary
A transmission system for a treadmill is provided, which includes a primary transmission wheel, a secondary transmission wheel, a metal disk and a magnetic assembly; wherein the primary transmission wheel is rotated coaxially with a chain wheel of the treadmill; the secondary transmission wheel is connected with the primary transmission wheel through a first belt; the metal disk is connected with the secondary transmission wheel through a second belt; the magnetic assembly is rotatably connected to a frame of the treadmill, and the magnetic assembly is movably close to or away from a center of the metal disk to provide a resistance to the metal disk; and the magnetic assembly is connected with a handle of the treadmill. Through the transmission system for the treadmill of the present application, the resistance to the movement may be changed to meet the user's demand for different exercise intensity.