Rail Trolley Power Transfer Unit Without Chains
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Solution Overview
Problem
Existing trolleys for heavy weight transfer in industrial settings require cumbersome chains for driving and braking, leading to safety issues, aesthetic concerns, and instability due to weight imbalance and chain mobility.
Innovation Solution
A trolley design featuring a power transfer unit with an input shaft, output shaft, and locking mechanism that allows bidirectional driving and braking without chains, along with a separable handle unit and a supporting wheel to stabilize the trolley on rails, reducing the risk of instability and improving ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chains are used for driving and braking the trolley, then the trolley can be operated, but safety issues and instability occur due to chain mobility and weight imbalance
Solution Approach 1:
The patent removes the chain mechanism entirely from the trolley design. Instead of using chains for driving and braking, the invention employs a direct power transfer system where the handle unit connects through a power transfer unit with input and output shafts to the driving wheels, eliminating the mobility and safety issues associated with chains
Solution Approach 2:
The power transfer unit is divided into separate input shaft and output shaft components, allowing the braking function to be independently controlled. The locking unit is segmented to provide separate locking mechanisms for the input shaft and output shaft, enabling independent braking control that improves safety without requiring chains
2Reliability
If a locking mechanism is added to prevent random brake release, then braking reliability improves, but device complexity increases
Solution Approach 1:
The locking unit is integrated into the existing power transfer unit structure, combining the braking and locking functions with the input and output shafts. The locking mechanism shares components with the power transfer system rather than being a separate addition, thus improving brake stability while minimizing increases in overall device complexity
3Ease of operation
If a separable handle unit is implemented, then ease of operation and storage improve, but connection reliability may be compromised
Solution Approach 1:
The connection portion between the handle unit and power transfer unit incorporates pre-designed coupling features and alignment guides that ensure proper engagement before operation. The connection mechanism is prepared in advance with complementary shapes and positioning elements that automatically align and secure the handle unit, guaranteeing reliable connection while maintaining ease of attachment and detachment
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 solution enhances safety and efficiency by eliminating chain-related hazards, providing a more stable and aesthetically pleasing operation while reducing worker fatigue and allowing for easier installation on various rail types.
Implementation Method 1
a locking unit which transfers the power from the input shaft to the output shaft but does not transfer power from the output shaft to the input shaft
Implementation Method 2
a handle bar which includes a bent portion bent by an external force, and when the handle unit is connected to the connection portion, a rotational force of the handle unit is transferred to the input shaft
Implementation Method 3
a supporting wheel to stabilize the trolley on rails
Data Source
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AI summary
Provided is a trolley which is easily driven or braked. The trolley includes a body unit which moves along a rail and a power transfer unit which transfers power for driving or braking of the body unit, in which the power transfer unit includes an input shaft, an output shaft which receives power of the input shaft and transfers the power to the body unit, and a locking unit which transfers the power from the input shaft to the output shaft but does not transfer power from the output shaft to the input shaft.