Caster Brake Lever and Torque Shaft for Incline Stability
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Solution Overview
Problem
Existing caster wheel systems lack a reliable mechanism to prevent rolling motion, especially on inclines, posing safety hazards and potential damage risks.
Innovation Solution
A caster wheel brake system with a pivotable parking brake lever, actuator arm, and torque shaft, integrated with a resilient member, allows for selective locking and unlocking of caster wheels using a single motion, ensuring enhanced stabilization by resisting movement in any direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a caster wheel system is designed without a braking mechanism, then the structure can move freely and easily, but it cannot prevent inadvertent movement on inclines or during parking, creating safety hazards
Solution Approach 1:
The resilient member (spring) automatically biases the brake lever toward the braking position, providing self-service stabilization without requiring continuous external input. The system maintains its own braking state passively, only requiring active release when movement is desired.
Solution Approach 2:
The braking function is extracted as a separate, dedicated mechanism (brake lever with distal end portion engaging the wheel) rather than being integrated into the main caster assembly. This allows the braking function to be added without fundamentally redesigning the entire caster system.
2Ease of operation
If a braking mechanism is added to prevent wheel rotation, then stability and safety are improved, but the device complexity increases
Solution Approach 1:
The brake lever is integrated with the actuator arm through slidable engagement, combining the braking function with the actuation mechanism. The proximal end portion of the brake lever slides within the actuator arm, merging two functions into a coordinated single-motion system.
Solution Approach 2:
The actuator arm serves multiple functions: it acts as both the actuating mechanism for releasing the brake and as a guide/rail for the brake lever's movement. This multi-functionality reduces the need for separate components for each function.
3Reliability
If a resilient member is used to bias the brake lever toward the braking position, then automatic stabilization is improved, but the device complexity increases
Solution Approach 1:
The resilient member provides self-service by automatically maintaining the brake lever in the braking position without requiring external control systems, sensors, or continuous power sources. The spring's elastic force naturally keeps the brake engaged.
Solution Approach 2:
The resilient member changes the force parameter applied to the brake lever, providing a continuous biasing force that can be overcome only by sufficient actuating force. This parameter change enables automatic engagement without complex control mechanisms.
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
The system provides robust and convenient locking and unlocking of caster wheels, preventing inadvertent movement and enhancing safety by maintaining stability on inclines, with minimal operational complexity and maintenance needs.
Implementation Method 1
a resilient or elastic member coupled to the brake lever for biasing the brake lever toward the braking position
Implementation Method 2
The brake lever includes a distal end portion for selectively engaging a caster wheel... By preventing rolling rotation of a caster wheel, the caster braking system causes the locked wheel to resist movement
Data Source
AI summary
A caster wheel brake system for carts and other wheeled articles is operable to secure caster wheels against rolling rotation along their horizontal rotation axes. The system includes a pivotable parking brake lever, an actuator arm, and a torque shaft extending between the brake lever and actuator arm. The brake lever includes a distal end portion for selectively engaging a caster wheel, a proximal end portion opposite the distal end portion, and a pivot coupling, the latter being pivotably secured to the cart or wheeled article. An actuator arm extends outwardly from a distal end portion of the torque shaft, with the actuator arm slidably engaging the proximal end portion of the brake lever. The torque shaft and the actuator arm are rotatable together to urge the brake lever toward the braking or non-braking position.