Electromagnetic Clutch Torque Control for Fishing Machine Unreeling
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Solution Overview
Problem
Conventional fishing machines with small diameter rotary drums and light weights face difficulties in automatic control due to mechanical load issues, leading to tangled fishing lines and inefficient unreeling processes.
Innovation Solution
A fishing machine equipped with a drive motor and an electromagnetic clutch that can variably set transmitting torque to cancel mechanical load, allowing smooth unreeling and reeling of fishing lines, using a control unit to manage rotation speed and direction for effective torque control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If small diameter rotary drums and light weights are used, then the fishing machine can be more compact and lightweight, but the mechanical load becomes too big relative to the external force from dropping weights, making automatic control difficult
Solution Approach 1:
The patent replaces the purely mechanical weight-driven unreeling system with an electromagnetic clutch-controlled system. The electromagnetic clutch (13) can be activated by a small current to transmit torque to the rotary drum (30), enabling light weights to overcome mechanical resistance and rotate the drum automatically without requiring heavy weights or manual intervention.
Solution Approach 2:
The patent changes the operational parameters of the electromagnetic clutch by controlling the application voltage. When voltage is applied to the electromagnetic clutch, it transmits torque to enable unreeling; when voltage is not applied, the clutch releases to allow free rotation. This parameter control allows the system to function with light weights while maintaining automatic control capability.
2Ease of operation
If the rotary drums are forcibly rotated in the unreeling direction, then the mechanical load issue is resolved, but the fishing lines become tangled in the reeling sections or on the main axis when weights do not drop
Solution Approach 1:
The patent makes the torque transmission dynamic through the electromagnetic clutch, which can be switched between engaged and disengaged states. The clutch allows the system to adapt: when weights drop, the clutch engages to control unreeling; when weights don't drop, the clutch disengages to allow free rotation and prevent tangling. This dynamic control resolves the contradiction between maintaining unreeling capability and preventing line tangling.
Solution Approach 2:
The patent implements feedback control through the control unit (15) that monitors the rotation detector (14) signals and adjusts the electromagnetic clutch activation accordingly. The control unit receives feedback about drum rotation status and weight dropping status, and automatically adjusts clutch engagement to prevent tangling while ensuring proper unreeling when needed.
3Speed
If the drive motor rotates the rotary drums at high speed, then the fishing lines are reeled in quickly, but the powder clutch breaks the rotary drums when the rotation speed exceeds a predetermined speed during unreeling
Solution Approach 1:
The patent introduces the electromagnetic clutch as an intermediary between the drive motor and the rotary drum during unreeling operations. The clutch acts as a mediator that can selectively transmit or block torque, allowing the system to control drum speed and prevent excessive speed that would break the powder clutch, while still enabling efficient reeling when the clutch is engaged.
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 smooth dropping of weights and automatic fishing operations even with small diameter rotary drums and light weights, preventing tangling and ensuring efficient fishing line management.
Implementation Method 1
an electromagnetic clutch (13) for transmitting the rotation of the drive motor (12) to the rotary drum (30)
Implementation Method 2
weights (sinkers) or fishing gears connected to the respective fishing lines drop by their own weight
Data Source
AI summary
A fishing machine includes a rotary drum for winding a fishing line, capable of rotating in a reeling direction and in a unreeling direction, a drive motor for rotating the rotary drum in the reeling direction and in the unreeling direction, and an electromagnetic clutch for transmitting the rotation of the drive motor to the rotary drum. The electromagnetic clutch is capable of variably setting a transmitting torque of rotation, and the transmitting torque is set to a value for cancelling a mechanical load in the unreeling direction of the fishing machine.