Rock Drill Shaft With Closed Suction Channel for Cutting Removal
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Solution Overview
Problem
Conventional drills for drilling rock or mineral materials face inefficiencies in removing cuttings and managing torque and axial impacts, particularly in designs that do not effectively transmit shock waves or utilize a closed channel system for coolant distribution.
Innovation Solution
The drill features a shaft designed in multiple parts with a channel running outside the base body, enclosed by a cover that forms a continuous, circumferentially closed canal along its length, allowing for efficient torque transmission and axial impact distribution, and potentially incorporating a suction system for cutting removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional suction drill design is used with a transverse bore and slipped suction sleeve, then the structure is simple, but the channel is not fully enclosed and cutting removal efficiency is reduced
Solution Approach 1:
The shaft is divided into functional segments: a base body for torque transmission and a separate attachment with a circumferentially closed channel for cutting removal. This segmentation allows each part to be optimized independently - the base body maintains structural simplicity while the attachment provides enclosed cutting removal, resolving the contradiction between productivity and complexity.
Solution Approach 2:
The attachment is arranged on the lateral surface of the base body and closes the channel outwards in the radial direction, creating a nested configuration where the enclosed channel system is integrated within the overall shaft structure. This nesting provides full enclosure for cutting removal without significantly increasing the external dimensions or complexity of the shaft.
2Productivity
If the channel runs outside the base body and is enclosed by a cover, then cutting removal is improved, but the manufacturing complexity increases
Solution Approach 1:
By separating the channel-closing function into a distinct attachment component rather than integrating it into the base body, the manufacturing process is simplified. The attachment can be manufactured separately and mounted on the lateral surface, avoiding complex integrated machining while still providing the enclosed channel configuration needed for efficient cutting removal.
Solution Approach 2:
The attachment acts as an intermediary component that provides the enclosed channel function without requiring complex modification of the base body. This intermediate element simplifies manufacturing by allowing the base body to be produced as a simple torque-transmission component while the attachment adds the cutting removal functionality.
3Length of moving object
If the cover is arranged entirely within a circumscribing cylindrical envelope, then the shaft diameter is minimized, but the channel enclosure is more constrained
Solution Approach 1:
The channel enclosure utilizes the radial dimension by arranging the attachment on the lateral surface of the base body, closing the channel outwards in the radial direction. This dimensional approach allows the cover to be contained within the cylindrical envelope while still providing effective channel enclosure, as the closure occurs in the radial dimension rather than requiring increased diameter.
Data Source
Figure 1~4
Figure 5~8
Figure 9~12
AI summary
The drill bit (1) has a drill head (3) attached to a base body i.e. rod, and an attachment part attached to a lateral surface of the base body and arranged within a cylindrical envelope circumscribing the body. An internal channel is formed within the attachment part and/or between the attachment part and the surface. The attachment part comprises a plate-like cover (40) that is in contact with flanks (36) of a concave segment and made of a plastic material. A tubular hollow body e.g. flexible hose, is made of fabric and/or plastic material. The cover closes flutes (27) in a radial direction. An independent claim is also included for a method for producing a drill bit.