Rack and Pinion Connector for Exercise Equipment Weight Adjustment
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Solution Overview
Problem
Existing exercise equipment lacks efficient mechanisms for incremental weight adjustment during workouts, leading to limited user customization and control over the weight lifted.
Innovation Solution
A connector apparatus comprising a rack, pinion gear, one-way bearing, and handle that allows the pinion gear to roll along the rack in one direction while preventing rollback, enabling incremental adjustment of secondary weights relative to primary weights, thereby allowing users to customize the weight lifted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a connector apparatus with one-way bearing and pinion gear is used, then weight adjustment precision and user customization are improved, but device complexity increases
Solution Approach 1:
The patent introduces a pinion gear as an intermediary mechanism between the handle and the weight stack. The pinion gear engages with a rack on the weight stack, converting rotational motion from the handle into precise linear displacement for weight adjustment. This intermediary mechanism enables fine-grained control over weight increments while maintaining a relatively simple overall structure.
Solution Approach 2:
The one-way bearing automatically prevents the pinion gear from rolling backward without requiring active intervention from the user or additional locking mechanisms. Once the user rotates the handle to adjust the weight, the one-way bearing self-activates to lock the pinion gear in place, providing automatic position maintenance and eliminating the need for separate locking operations.
2Adaptability or versatility
If incremental weight adjustment mechanism is added, then user customization capability is improved, but ease of operation deteriorates
Solution Approach 1:
The connector apparatus employs a dynamic engagement system where the pinion gear can freely roll along the rack during adjustment operations, enabling smooth and continuous weight changes. The one-way bearing dynamically switches between allowing forward motion (during handle rotation) and preventing backward motion (to maintain position), providing both ease of adjustment and stable locking without requiring complex control systems.
3Ease of operation
If pinion gear is allowed to roll freely in both directions, then ease of adjustment is improved, but weight position stability deteriorates
Solution Approach 1:
The patent converts the potentially harmful effect of gravity causing the pinion gear to roll backward into a beneficial automatic locking feature. The one-way bearing is designed to allow free rolling in the forward direction (aided by user input) but automatically engages to prevent backward rolling when gravity tries to pull the weight stack down. This transforms the destabilizing force of gravity into a self-locking mechanism that maintains weight position stability without requiring additional energy or complex control systems.
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 easily add or remove weights in increments, providing precise control over the weight lifted, enhancing user customization and workout flexibility.
Implementation Method 1
a one-way bearing that allows the pinion gear to roll along the rack in a first direction and prevents the pinion gear from rolling along the rack in an opposite, second direction
Implementation Method 2
a rack coupled to the first component; a pinion gear coupled to the second component, the pinion gear being configured to mate with the rack such that the pinion gear can roll along the rack
Data Source
AI summary
A connector apparatus connects a first component of an exercise machine to a second component of the exercise machine. The connector apparatus comprises a rack coupled to the first component; a pinion gear coupled to the second component, the pinion gear being configured to mate with the rack such that the pinion gear can roll along the rack; a one-way bearing that allows the pinion gear to roll along the rack in a first direction and prevents the pinion gear from rolling along the rack in an opposite, second direction; and a handle that is coupled to the one-way bearing. The handle is configured to move back and forth between a first position wherein the pinion gear is mated with the rack and allowed by the one-way bearing to roll along the rack in the first direction and prevented by the one-way bearing from rolling along the rack in the second direction; and a second position wherein the pinion gear is separated from the rack and is freely movable in the first and second directions.