Bicycle Trainer Four-Bar Linkage for Dynamic Motion Simulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stationary trainers and bicycles lack dynamic motion, restricting lateral and fore-aft movements that are essential for a realistic cycling experience, leading to incomplete muscle engagement and discomfort during workouts.
Innovation Solution
A dynamic trainer mechanism using a four-bar linkage system with floating links and linear bearings, allowing for natural lateral and fore-aft movements, simulating outdoor cycling dynamics by positioning the center of rotation near the bicycle's bottom bracket and integrating with existing trainers or stationary bicycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid stationary trainer is used to maintain stability and control, then the trainer can reliably hold the bicycle in place, but lateral and fore-aft movements are restricted preventing realistic cycling motion
Solution Approach 1:
The patent applies the Dynamics principle by transforming the rigid, static trainer structure into a dynamic system with controlled mobility. The rocker plate mechanism allows the trainer to rock laterally and move fore-aft in response to cyclist input, while the friction-based resistance device maintains controlled contact. This enables realistic cycling motions including lateral rocking and surging while preserving sufficient stability for control and safety.
Solution Approach 2:
The patent employs Parameter changes by varying the friction characteristics of the resistance device. The friction coefficient can be adjusted to balance between providing enough resistance for effective training and allowing sufficient lateral and fore-aft motion. This parameter adjustment enables the system to adapt between more stable and more mobile states based on training requirements.
2Ease of operation
If lateral motion is allowed on the trainer, then cyclists can engage core and upper body muscles for a more complete workout, but the trainer may lose control of the bicycle
Solution Approach 1:
The friction coefficient of the resistance device is adjusted to optimize the balance between allowing lateral motion for muscle engagement and maintaining sufficient grip for bicycle control. By tuning this parameter, the system enables realistic cycling motions while preventing excessive slippage that would compromise control and safety.
3Device complexity
If the trainer is fixed in a static position, then the structure is simple and stable, but it cannot simulate outdoor cycling dynamics and rocking motions
Solution Approach 1:
The patent introduces dynamic capabilities to the trainer through the rocker plate mechanism, which enables lateral rocking and fore-aft surging motions that simulate outdoor cycling. This adds adaptability and realism to the training experience while maintaining relatively simple implementation through friction-based contact and passive mechanical motion.
4Ease of manufacture
If the center of rotation is positioned far from the bottom bracket, then the mechanism is easier to implement, but the rocking motion feels unnatural and difficult to synchronize with pedaling
Solution Approach 1:
The patent applies Local quality by specifically positioning the center of rotation near the bicycle's bottom bracket, which is the natural pivot point for cycling motions. This localized geometric optimization ensures that the rocking motion feels intuitive and synchronizes naturally with the pedaling cycle, enhancing the realism and ease of operation despite potentially increased implementation complexity.
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 cyclists to experience a more realistic and engaging workout by allowing intuitive rocking and fore-aft motions, improving muscle engagement and reducing discomfort, while maintaining stability and synchronizing with pedaling actions.
Implementation Method 1
a four-bar linkage mechanism to provide a rocking and fore-aft motion for a stationary trainer. An example four-bar linkage mechanism can be defined by: a grounding base including two grounding pivots; a floating link with two pivots; a supporting member connected to the floating link which can support a bicycle and trainer; and two side links each connected to the grounding pivots in the base at one end and to the pivots on the floating link at the other end
Implementation Method 2
The linear bearings can be between any component of the dynamic trainer that is capable of moving in the fore-aft direction and a component that is stationary in the fore-aft direction
Implementation Method 3
Spring assemblies can be used to return the dynamic trainer away from the limits of fore-aft travel and toward a center neutral fore-aft position of the dynamic trainer
Implementation Method 4
A trainer can include a resistance mechanism and a flywheel, the combination of which will hereafter be referred to as a resistance device
Data Source
AI summary
Provided herein is a dynamic device that can provide lateral rocking with fore-aft action to a stationary bicycle trainer. Also provided herein is a dynamic device, which can include a four-bar linkage mechanism that can provide a stationary trainer or stationary bicycle with an intuitive and natural-feel lateral rocking action and fore-aft action to simulate motions of a bicycle being ridden in a non-stationary environment.