Core Drill Screw Connection Release Using Motor Counter-Torque
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Solution Overview
Problem
Conventional methods for releasing screw connections between core drilling devices and core bits are difficult, especially when corrosion occurs, and often require additional tools or lubricants, leading to inefficiencies and contamination.
Innovation Solution
A method involving a core drilling device with a motor that generates a counter-torque opposite to the core bit's rotation direction to facilitate easy tightening or releasing, using a motor speed of 0 rpm to increase torque difference and assist with a wrench for separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wrenches with long levers and additional aids are used to release the screw connection, then the screw connection can be released, but the device complexity and risk of losing aids increase
Solution Approach 1:
The core drilling device generates its own counter-torque through the motor to facilitate releasing the screw connection, eliminating the need for external aids like long-lever wrenches. The system serves itself by using its motor to create the necessary opposing force.
Solution Approach 2:
Instead of applying force in the same rotation direction to loosen the connection, the motor generates counter-torque in the opposite direction to the core bit's rotation, creating a torque difference that facilitates easy releasing of the screw connection.
2Ease of operation
If quick release rings are used to make releasing easier, then the screw connection can be released more easily, but the system stiffness is reduced
Solution Approach 1:
The motor-generated counter-torque provides the releasing mechanism without requiring intermediate elements like quick release rings, thereby maintaining the original system stiffness while achieving easy releasing.
Solution Approach 2:
The motor operates in reverse to the core bit rotation direction, generating counter-torque that loosens the screw connection without compromising the structural integrity and stiffness of the drilling system.
3Ease of operation
If a generous amount of lubricant is used to release the screw connection, then the screw connection can be released, but material consumption and contamination increase
Solution Approach 1:
The motor-generated counter-torque provides a mechanical solution for releasing the screw connection without requiring any lubricant, eliminating material consumption and contamination issues.
Solution Approach 2:
By applying counter-torque in the opposite direction of rotation, the motor creates sufficient torque difference to loosen the screw connection mechanically, replacing the chemical solution of lubricant with a mechanical approach.
4Ease of operation
If the motor generates counter-torque opposite to core bit rotation, then the screw connection can be released easily, but energy is consumed during the releasing process
Solution Approach 1:
The motor generates counter-torque only partially during the releasing process, just enough to create the necessary torque difference for loosening the screw connection, rather than continuous full-power operation, thus minimizing energy consumption.
Solution Approach 2:
The motor temporarily operates in reverse to generate counter-torque for releasing, then returns to normal operation for drilling, so energy consumption is limited to the brief releasing phase rather than continuous consumption.
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 easy and contamination-free separation of core bits from drilling devices with minimal additional aids, reducing material consumption and cleaning needs.
Implementation Method 1
a counter-torque is generated when the motor is activated
Implementation Method 2
a motor which is configured to generate a torque for driving the core bit
Data Source
AI summary
A method for tightening or releasing a screw connection between a core drilling device and a core bit, the core drilling device including a core bit and a motor, the core bit being able to be caused to move in a first direction of rotation while, by activation of the motor during the tool change, a counter-torque is generated in order to tighten or release the twist lock between the core drilling device and the core bit. A core drilling device for carrying out the method. By activation of the motor of the core drilling device, the motor can be caused to operate counter to the movement of the core bit in the first direction of rotation. As a result, a difference between the torque in the first direction of rotation and the counter-torque can be significantly increased by activation of the motor.