Magnetic Core Drill Layout for Confined-Space Drilling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic core drilling machines are typically tall, making them unsuitable for use in confined spaces, such as I-beams, due to their mechanical design.
Innovation Solution
The spindle longitudinal axis is aligned substantially parallel to the rotor shaft longitudinal axis, allowing for axial adjustment of the tool spindle relative to the drive motor and magnetic base, enabling a compact design with a brushless electrically commutated drive motor and a three-stage gear mechanism, which reduces the overall length and weight of the drilling machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tool spindle is moved towards the workpiece together with the drive motor relative to the magnetic base, then a simple mechanical solution is achieved, but the drilling machine becomes comparatively tall
Solution Approach 1:
The patent repositions the drive motor from a rearward location to a lateral position beside the tool spindle, changing the spatial arrangement from a longitudinal configuration to a transverse configuration. This dimensional reorganization allows the motor to be mounted sideways rather than behind the spindle, significantly reducing the overall length of the drilling machine while maintaining the functional connection through the gear mechanism
2Ease of manufacture
If the longitudinal axis of the spindle is aligned substantially parallel to the rotor shaft longitudinal axis, then the gear mechanism can be implemented easily without bevel gears, but the power transmission path becomes longer
Solution Approach 1:
The patent employs a multi-stage gear mechanism with three distinct gear stages that provide both speed reduction and positional adjustment. This dynamic gear system compensates for the longer power transmission path by incorporating adjustable intermediate stages that can be configured to optimize the transmission geometry, maintaining ease of manufacture with standard parallel-axis gears while managing the extended power path through modular staging
3Length of moving object
If an electrically commutated drive motor is used, then the overall length of the drive motor is significantly shorter and maintenance effort is reduced, but the motor power density is lower compared to universal motors
Solution Approach 1:
The patent combines multiple functional elements into an integrated compact assembly where the EC motor, gear mechanism with three stages, and tool spindle are tightly coupled in a lateral configuration. This merging of components allows the system to achieve the required output power through the mechanical advantage of the multi-stage gear reduction, compensating for the lower motor power density while maintaining a short overall length
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
This design results in a very compact and lightweight drilling machine that can be used in spatially confined conditions without overloading risks, with enhanced maintenance efficiency and power transmission, facilitating its use in limited spaces.
Implementation Method 1
a magnetic base for detachably securing the drilling machine to a surface
Data Source
AI summary
A drilling machine, in particular a magnetic core drilling machine. The drilling machine having a magnetic base to detachably secure the drilling machine to a surface. A drive motor is arranged in a housing and has a rotor shaft with a rotor shaft longitudinal axis that is connected in a power-transmitting manner via a gear mechanism to a tool spindle with a spindle longitudinal axis. A tool holder is connected to the tool spindle to receive a drilling tool. The spindle longitudinal axis is aligned substantially parallel to the longitudinal axis of the rotor shaft, and the tool spindle is axially adjusted along the longitudinal axis of the spindle relative to the drive motor and the magnetic base.