Cam Weight-Adjustable Barbell for Low-Wear Plate Hitching
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Solution Overview
Problem
Existing weightlifting barbells require manual adjustment of weight plates, leading to wear, safety risks, and storage challenges due to friction and space occupation.
Innovation Solution
A weight-adjustable barbell with cam mechanisms and wear-resistant layers that allow for synchronized rotation and hitching of weight plates, reducing friction and enabling easy weight adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If weight plates are manually added or removed to adjust load, then weight adjustment is achieved, but friction between adjacent weight plates causes wear and safety problems
Solution Approach 1:
The patent introduces a cam mechanism as an intermediary device between the weight plates and the barbell rod. This cam mechanism includes a cam body with a cam surface that engages with the weight plates, providing a controlled interface for weight adjustment. The intermediary cam mechanism reduces direct friction between weight plates and eliminates the need for manual handling, thereby reducing wear and improving safety while maintaining weight adjustability.
2Ease of operation
If weight plates are frequently assembled and disassembled, then weight adjustment is achieved, but friction causes wear and mounting instability
Solution Approach 1:
The cam mechanism serves as a mediator that simplifies the weight adjustment operation. By rotating the cam body, weight plates can be easily engaged or disengaged without manual assembly or disassembly. This reduces operational complexity while protecting weight plates from wear, thereby improving both ease of operation and durability.
Solution Approach 2:
The cam mechanism is designed to automatically secure weight plates in place through its cam surface geometry. As the cam body rotates, the cam surface naturally guides the weight plates into their proper positions and locks them securely without requiring additional manual intervention or complex assembly procedures.
3Stability of the object's composition
If weight plates are centrally placed on the barbell, then weight distribution is achieved, but there is risk of plates falling and occupying considerable storage space
Solution Approach 1:
The cam mechanism acts as an intermediary locking system that secures weight plates to the barbell rod. The cam surface engages with the weight plates to prevent them from slipping or falling off during use. This intermediary locking mechanism eliminates the safety risk of falling plates while maintaining proper weight distribution on the barbell.
4Quantity of substance
If the barbell is large in size, then weight capacity is achieved, but it occupies considerable space resulting in storage difficulties
Solution Approach 1:
The cam mechanism introduces dynamic adjustability to the barbell system. The cam body can be rotated to different positions to engage or disengage weight plates, allowing the barbell to adapt to different weight configurations. This dynamic mechanism enables the barbell to maintain high weight capacity while reducing the space required for storage when weight plates are not in use.
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
Facilitates convenient, safe, and stable weight adjustment with reduced wear and storage space requirements.
Implementation Method 1
a cam mechanism configured for hitching a weight plate
Implementation Method 2
Friction between two adjacent weight plates can cause wear
Data Source
AI summary
A cam mechanism configured to hitch a weight plate includes a bearing layer, a first wear-resistant layer arranged on one side of the bearing layer, and a second wear-resistant layer arranged on another side of the bearing layer. The second wear-resistant layer is configured to reduce wear of the weight plate in response to the weight plate being in contact with the cam mechanism. A weight-adjustable barbell includes: a barbell rod assembly including two transmission shafts, a plurality of weight plates, and a plurality of the above cam mechanisms sleeved on the two transmission shafts and configured for hitching the plurality of weight plates.