Four-Core-Bit Drilling Head With Adjustable Hole Spacing
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Solution Overview
Problem
Conventional core drilling machines are inefficient as they require moving the machine to drill multiple holes one by one, making the process laborious and time-consuming due to the need for individual hole positioning and anchoring.
Innovation Solution
A four-hole core drilling machine design that allows simultaneous drilling of four holes using four core bits, facilitated by a vertically reciprocating carriage, a motor, a pivoting plate, drive pulleys or sprockets, and a belt or chain system to transmit rotational force, enabling synchronized drilling with adjustable spacing between holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional core drilling machine uses a single core bit, then the device complexity is low, but the productivity is low because multiple holes require sequential drilling with repeated positioning and anchoring
Solution Approach 1:
The single drilling function is segmented into four independent drilling units, each with its own core bit. The drilling assembly is divided into four separate drilling mechanisms that can operate simultaneously, allowing four holes to be drilled at once instead of sequentially, thereby quadrupling the productivity while maintaining manageable complexity through modular design
Solution Approach 2:
Four independent drilling mechanisms are merged into a single integrated machine body with a common base, stand, and power transmission system. The four core bits are mounted on a shared pivoting plate that can be positioned together, allowing all four holes to be drilled in one operation rather than requiring four separate machine setups, thus combining multiple functions into one device
2Manufacturing precision
If the core drilling machine is moved to drill multiple holes, then the manufacturing precision of individual holes is maintained, but the loss of time increases due to repeated positioning and anchoring operations
Solution Approach 1:
The positions of all four holes are predetermined by the fixed geometric arrangement of the four core bits on the pivoting plate. Before drilling begins, the entire four-bit assembly is positioned once to cover all required hole locations, eliminating the need for repeated positioning operations. The preliminary setup includes anchoring the base once and adjusting the pivoting plate angle once, after which all four holes are drilled simultaneously without further intervention
Solution Approach 2:
The same drilling mechanism is copied four times in a fixed geometric pattern on the pivoting plate. Each core bit is an identical copy that can drill holes with the same precision as a single-bit machine. By copying the drilling function four times and arranging them in a predetermined pattern, the system maintains manufacturing precision while eliminating the time loss associated with moving and repositioning a single-bit machine between holes
3Productivity
If four core bits are mounted simultaneously, then the productivity increases by drilling four holes at once, but the device complexity increases due to additional drive mechanisms and pulley systems
Solution Approach 1:
A single motor serves as a universal power source for all four core bits through a belt-driven pulley system. The motor's rotational force is transmitted through a main pulley to four smaller pulleys, each connected to a core bit via a shaft. This multi-functional drive system allows one motor to simultaneously power four drilling operations, achieving the productivity of four separate motors while using only one actual motor unit, thus reducing complexity compared to having four independent drive mechanisms
Solution Approach 2:
A belt-driven pulley system acts as an intermediary mechanism between the single motor and the four core bits. The pulleys transmit and distribute the rotational force from the motor to all four drilling positions uniformly. This intermediary transmission system simplifies the drive mechanism by using a common power source and distribution system rather than requiring direct connection of four separate motors to four core bits, thereby reducing overall device complexity while maintaining the ability to drill four holes simultaneously
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 efficient and rapid drilling of multiple holes simultaneously, reducing operational time and effort by allowing all holes to be drilled in a single setup with precise control over spacing and alignment.
Implementation Method 1
a belt mounted around the drive pulley and the four driven pulleys, to transmit rotation force of the drive pulley to the four driven pulleys
Implementation Method 2
a core bit configured to drill a hole into the structure through frictional contact between the core bit and the structure
Data Source
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AI summary
A four-hole core drilling machine of the invention includes a vertically reciprocating carriage mounted to a body, a motor coupled to the carriage, a fixing plate coupled to the carriage, to rotatably support a drive shaft of the motor, a pivoting plate fastened to the fixing plate under the condition that a pivot angle of the pivoting plate is changed, a drive pulley coupled to the drive shaft, to be rotatable by the drive shaft, four driven pulleys rotatably mounted to the pivoting plate near corners of the pivoting plate, four driven shafts rotatably mounted to the pivoting plate and coupled to the four driven pulleys, to be rotatable by the driven pulleys, a belt mounted around the drive pulley and the driven pulleys, to transmit rotation force of the drive pulley to the driven pulleys, and four core bits coupled to lower ends of the driven shafts.