Multi-Speed Cable Puller Transmission
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Solution Overview
Problem
Existing cable pullers require operators to stop the system to change speeds, disrupting the pulling process and inefficiencies in power usage due to manual gear shifting.
Innovation Solution
A multi-speed automatic shifting transmission system that allows speed changes without stopping the cable puller, utilizing a drive motor with gearing sets for low, medium, and high speeds, and a shift motor to automatically adjust gear positions based on power levels and speed, enabling continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If manual gear shifting is used to change speeds, then speed control is achieved, but the cable puller must stop and the operator must manually reconfigure the system
Solution Approach 1:
The patent implements automatic shifting transmission that dynamically changes gear ratios without stopping the cable puller. The system uses a control system to automatically select appropriate gear ratios based on operating conditions, eliminating the need for manual intervention and continuous stopping during speed changes.
Solution Approach 2:
The automatic shifting transmission system performs self-adjustment of gear ratios based on motor speed and load conditions. The control system monitors operational parameters and autonomously selects optimal gear ratios, freeing the operator from manual gear shifting tasks and maintaining continuous cable pulling operation.
2Adaptability or versatility
If the motor stops to change gear position, then gear ratio adjustment is possible, but the pulling process is interrupted and time is lost
Solution Approach 1:
The system prepares multiple gear sets in advance, with each gear set pre-configured for different speed requirements. The control system can pre-select the appropriate gear set based on anticipated load conditions, allowing seamless transitions without stopping the motor or interrupting the cable pulling process.
Solution Approach 2:
The patent introduces a control system as an intermediary between the operator and the transmission system. This control system acts as a mediator that automatically manages gear ratio selection based on motor speed and load conditions, eliminating the need for direct manual intervention and motor stopping during gear changes.
3Device complexity
If single-speed operation is used, then the system is simpler, but power usage is not optimized for varying load conditions
Solution Approach 1:
The transmission system dynamically adjusts gear ratios based on real-time motor speed and load conditions. The control system continuously monitors operational parameters and selects optimal gear ratios to maximize motor efficiency across varying load conditions, transforming a static single-speed system into a dynamic multi-speed system.
Solution Approach 2:
The system changes the transmission ratio parameter automatically based on operating conditions. By varying the gear ratio parameter in response to motor speed and load changes, the system optimizes power transmission efficiency without requiring complex manual adjustment 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
Enables seamless speed adjustments during cable pulling, optimizing power usage and maintaining control over the load without interruptions, improving efficiency and user experience.
Implementation Method 1
The capstan is powered by a motor and acts as a frictional force multiplier
Implementation Method 2
A drive motor is configured to rotate the output shaft via gearing comprising a low speed gear set, a medium speed gear set, and a high-speed gear set
Implementation Method 3
A shift motor is configured to drive a cam to engage gearing coupled to the output shaft to a gear position comprising a low speed position, a medium speed position, and a high-speed position
Data Source
AI summary
A cable puller is provided to pull rope or cable where the cable puller includes a puller frame, a capstan rotatably mounted on the puller frame around a first axis of rotation, an output shaft rotatably mounted to the puller frame and coupled to the capstan, The capstan is configured to rotate when the output shaft is driven. A shift motor is configured to drive a cam to engage gearing coupled to the output shaft to a gear position comprising a low speed position, a medium speed position, and a high-speed position.