Core Drill Handle and Fluid Valve Layout for Quiet Operation
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Solution Overview
Problem
Existing rotary power tools, particularly core drills, face challenges in providing efficient and quiet operation with adjustable torque and fluid delivery systems, and lack ergonomic design for user comfort and versatility.
Innovation Solution
A core drill design featuring a housing with a motor, a high-voltage battery, a spindle for rotation, a fluid delivery system with a regulable valve, and an auxiliary handle with multiple mounting points, along with a transmission mechanism for shifting between high-speed and low-speed modes, and an ergonomic handle configuration for reduced noise and improved user control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high-voltage battery (greater than 40 volts) is used to provide power to the motor, then the power and performance of the core drill is improved, but the weight and size of the battery pack increases
Solution Approach 1:
The battery pack is designed with a removable coupling mechanism that allows it to be detached from the housing. This dynamic configuration enables users to remove the heavy battery pack when not in use or transport the tool without the battery, effectively reducing the weight of the moving object during storage and transport while maintaining full power capability during operation.
2Adaptability or versatility
If an auxiliary handle is provided with multiple mounting points for different positions, then the adaptability and user comfort are improved, but the device complexity increases
Solution Approach 1:
The auxiliary handle is designed with multiple mounting points that can be coupled to different locations on the housing (first mounting point on the housing, second mounting point on the band assembly). This universal mounting capability allows the same auxiliary handle to serve multiple functions and be positioned optimally for different user preferences and application requirements, achieving adaptability without requiring entirely different handle designs for each position.
3Manufacturing precision
If a fluid delivery system with a regulable valve is included for cooling and lubrication, then the manufacturing precision and tool life are improved, but the device complexity and ease of operation worsen
Solution Approach 1:
The fluid delivery system includes a regulable valve that allows the operator to control the flow of fluid to the spindle. This self-service mechanism enables the user to adjust the fluid flow according to specific operating conditions and requirements, maintaining manufacturing precision through effective cooling and lubrication while giving the operator direct control over the system's operation.
4Ease of operation
If the auxiliary handle is selectively attachable to different mounting points at different positions along the rotational axis, then the ease of operation and user comfort are improved, but the device complexity increases
Solution Approach 1:
The mounting system is segmented into multiple discrete mounting points located at different positions along the rotational axis (first mounting point on housing, second mounting point on band assembly). This segmentation allows the auxiliary handle to be selectively attached to different segments of the overall structure, providing users with multiple control position options while maintaining a relatively simple and modular mounting system that does not require complex mechanisms.
Data Source
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AI summary
A power tool comprises a housing; a motor supported within the housing; a handle extending from the housing and defining a gap between the handle and the housing; a trigger coupled to the handle, the trigger being manipulable to energize the motor; and a spindle configured to rotate about a rotational axis in response to torque received from the motor, fluid delivery system configured to supply fluid to the spindle, the fluid delivery system including a valve operable to regulate a flow of fluid to the spindle, the valve including an actuator, wherein the actuator is disposed within the gap, or wherein the actuator is rotatable about a valve axis coplanar with the rotational axis.