Core Bit One-Touch Locking to Prevent Drill Shaking

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Solution Overview

Problem

Existing core drills face inefficiencies and safety issues during concrete perforation due to lack of locking mechanism between the core bit and decelerating unit, leading to physical fatigue, increased operation time, and potential safety hazards from shaking and breakage of components.

Innovation Solution

A lock pin system is used to maintain automatic locking between the core bit and decelerating unit, with a core bit shake prevention part installed to prevent shaking and a polygonal-shaped power force axis for direct actuator compatibility, allowing easy assembly and disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If no lock function is provided between core bit and decelerating unit, then assembly and disassembly are simple, but movement and shaking occur during operation causing safety hazards

Engineering Contradiction:

Improvelocking stabilityVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The lock pin is designed to automatically engage with the locking groove when the core bit is inserted into the decelerating unit. The elastic force of the spring automatically pushes the lock pin into the locking groove, eliminating the need for manual locking operations while ensuring reliable connection during operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The locking mechanism is divided into separate functional components: a lock pin for engagement, a locking groove for positioning, and a spring for providing elastic force. This segmentation allows each component to perform its specific function efficiently while maintaining overall system simplicity.

Inventive Principle:

Principle #1Segmentation

2Productivity

If core bit length is increased for deeper perforation, then perforation capability is improved, but shaking and breakage occur due to cantilever effect

Engineering Contradiction:

Improveperforation capabilityVSAvoidcomponent durability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

A support rod is introduced as an intermediary component between the core bit and the drill body. This support rod provides additional support to the core bit during operation, preventing excessive shaking and reducing the risk of breakage, thereby enabling safer use of longer core bits for deeper perforation tasks.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If automatic pressure tool is added to improve perforation efficiency, then operation time is reduced, but device complexity and cost increase

Engineering Contradiction:

Improveperforation efficiencyVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The decelerating unit is designed to serve multiple functions: it not only reduces the speed of the motor but also provides the locking function through the integrated lock pin and locking groove mechanism. This multi-functionality eliminates the need for separate automatic pressure tools while maintaining improved perforation efficiency.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If custom axis holder is manufactured for polygonal-shaped power force axis, then actuator compatibility is achieved, but manufacturing cost and time increase

Engineering Contradiction:

Improveactuator compatibilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Instead of modifying the actuator to fit a custom axis holder, the design inverts the approach by making the decelerating connector itself have the polygonal-shaped power force axis. This allows direct compatibility with standard actuators that have polygonal output shafts, eliminating the need for custom axis holders and reducing manufacturing complexity.

Inventive Principle:

Principle #13The other way round (Inversion)

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 operation efficiency, prevents safety accidents, and improves durability by maintaining automatic locking and allowing easy separation of components, while also reducing manufacturing costs and time through compatibility with standard actuators.

Implementation Method 1

a lock pin mechanism is used to maintain automatic locking between the core bit and decelerating unit

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS11951653B2Core drill having one touch lock function of core bit

Publication Date: 2024.04.09 DAESUNG GOLDEN TECHNOLOGY CO LTD

AI summary

Provided is a core drill having one touch lock function of a core bit, and particularly, new-conceptional technology of maintaining locking automatically during assembling a core bit and a decelerating unit, and releasing the locking easily, and the core drill conventionally disclosed had problems that movement and separation of the core bit and the decelerating unit of the core drill often occur during operation, because there is no specific lock function in the state that the core bit and the decelerating unit are assembled, and in this disclosure of the present invention to solve the problems, there is provided new technology for automatically maintaining locking if releasing the locking after inserting a decelerating connector coupled to a core bit into a connection hole formed in a spindle in the state of releasing the locking by pressing the lock pin elastically installed in a lock housing fittingly installed outside the spindle.