Replaceable Vacuum Drill Bit Assembly for Dust Extraction
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Solution Overview
Problem
Rock drill bits used for drilling into concrete and masonry produce significant dust, which is not effectively managed by existing vacuum systems, leading to inefficiencies and increased debris during operations.
Innovation Solution
A vacuum bit assembly that includes a replaceable drill bit, an adapter with a locking mechanism, and a suction channel, allowing for secure attachment and axial movement of the drill bit, which facilitates dust removal and reduces fatigue through axial impact force transfer and torque carrying pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rock drill bit is used to drill into concrete and masonry, then drilling function is achieved, but significant dust is produced that is not effectively managed
Solution Approach 1:
The suction channel is integrated within the drill bit structure itself, with the channel running through the hollow interior of the drill bit. This nesting approach allows the vacuum system to be embedded within the drilling tool, enabling dust to be suctioned directly from the drilling zone through the hollow core of the drill bit, thereby effectively managing dust while maintaining drilling efficiency.
Solution Approach 2:
A vacuum source is introduced as an intermediary system connected to the drill bit through the suction channel. This vacuum source acts as a mediator that actively removes dust particles generated during drilling, preventing dust accumulation and maintaining clean drilling conditions without interfering with the drilling operation.
2Adaptability or versatility
If a fixed drill bit is used in the vacuum bit assembly, then structural simplicity is maintained, but drill bit replacement and adaptability are limited
Solution Approach 1:
The connection between the drill bit and adapter is segmented into discrete components: a locking member with an elongated slot on the drill bit, a corresponding aperture and locking feature on the adapter, and a collar for securing. This segmentation allows the drill bit to be easily detached and replaced while maintaining a secure connection during operation, balancing adaptability with controlled complexity.
3Strength
If axial movement of the locking member is restricted, then secure attachment is achieved, but fatigue from impact forces increases
Solution Approach 1:
The locking member is designed with an elongated slot that permits controlled axial movement relative to the adapter during impact operations. This dynamic design allows the locking member to move slightly in response to impact forces, absorbing stress and reducing fatigue, while the collar maintains secure attachment by preventing excessive movement or detachment.
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 vacuum bit assembly effectively manages dust and debris during drilling operations by allowing for secure attachment and axial movement of the drill bit, reducing fatigue and enabling efficient dust removal, while allowing for easy replacement of drill bits.
Implementation Method 1
The dust is extracted through the rock drill bit by a vacuum source connected to the rock drill bit
Implementation Method 2
transferring the impact force axially along the axis of rotation from the adapter to the drill bit while allowing the locking member to move axially within the elongated slot
Implementation Method 3
The pin slot receives the pin to carry torque from the adapter to the drill bit
Data Source
AI summary
A vacuum bit assembly includes an adapter having first and second ends, a central bore defined in the first end, and a locking member extending into the central bore. The vacuum bit assembly includes a drill bit having a workpiece engaging end, a connection, and a suction channel extending between the workpiece engaging and connection ends. The drill bit defines an axis of rotation that extends centrally through the drill bit between the workpiece engaging and connection ends and centrally through the adapter between the first and second ends. The drill bit includes an elongated slot adjacent the connection end. The elongated slot receives the locking member to secure the drill bit to the adapter. The vacuum bit assembly further includes a collar to selectively secure the locking member in the elongated slot. The locking member is axially movable within the elongated slot during operation of the vacuum bit assembly.