Bicycle Trainer Wheel Holding Fixture with Cam Lever
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Solution Overview
Problem
Conventional bicycle trainers require users to manually hold and lift the bicycle while tightening mounting bolts, making the wheel securing process inconvenient, inaccurate, and potentially damaging to the wheel or frame.
Innovation Solution
A bicycle trainer with a holding fixture that includes two clamp assemblies with a quick-release device and a swivel frame, allowing the wheel to be secured in a non-coaxial direction relative to the axle, enabling easy, rapid, and precise positioning and locking of the wheel without excessive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mounting bolts are used to secure the bicycle wheel, then the wheel can be firmly attached to the trainer, but the user cannot pre-position the wheel or accurately control clamping tightness, and excessive tightening can damage the wheel or frame
Solution Approach 1:
The patent changes the clamping mechanism from threaded bolts to a cam-based lever system. The cam mechanism transforms rotational motion into linear clamping force, allowing precise control of clamping tightness through lever positioning. This enables accurate wheel positioning and controlled tightness without risk of over-tightening damage.
Solution Approach 2:
The patent replaces the threaded bolt mechanical system with a cam and lever mechanical system. The cam mechanism provides mechanical advantage and precise force control, while the lever system enables easy operation with one hand. This substitution resolves the contradiction by providing both firm attachment and precise positioning control.
2Reliability
If mounting bolts are used to secure the bicycle wheel, then the wheel can be firmly attached to the trainer, but the mounting procedure becomes inconvenient and time-consuming
Solution Approach 1:
The patent employs a dynamic cam mechanism that allows rapid adjustment of wheel clamping. The lever can be quickly positioned to engage or disengage the cam, enabling fast mounting and dismounting operations. This dynamic system replaces the slow threaded bolt tightening process while maintaining secure attachment.
Solution Approach 2:
The cam mechanism is pre-configured to provide automatic wheel centering and positioning as the lever is engaged. This preliminary action eliminates the need for manual alignment and positioning adjustments, significantly reducing mounting time while ensuring proper wheel attachment.
3Stability of the object's composition
If the wheel is secured tightly with mounting bolts, then the wheel remains stable on the trainer, but the bicycle wheel or frame may be damaged
Solution Approach 1:
The cam mechanism provides inherent feedback through its mechanical design. As the lever is engaged, the cam automatically adjusts to the wheel's position and applies progressive clamping force. The system self-regulates to provide sufficient stability without excessive force, preventing damage to the wheel or frame while maintaining secure attachment.
Data Source
AI summary
A bicycle trainer includes a body having two spaced positioning portions for supporting the wheel axle of a bicycle wheel, a damper unit for giving a damping resistance to the bicycle wheel, and a holding fixture mounted at the two positioning portions of the body for securing the bicycle wheel in a non-coaxial manner relative to the axial direction of the wheel axle. Thus, the invention can conveniently, rapidly and steadily secure the bicycle wheel in position.