Extendable Dust Collection Cup for Hammer Drill Bit Visibility
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Solution Overview
Problem
Existing dust collection cups for hammer drills obstruct the view of the bit tip during chipping operations, requiring the cup to be detached or replaced with a shorter model to maintain visibility.
Innovation Solution
A dust collection cup with an extendable unit, allowing the bit tip to be viewable without detachment or replacement, featuring a bellows-like structure with adjustable length through a bayonet connection system that includes a cap and an extendable unit with crests that can be folded or extended to accommodate different operational needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dust collection cup body is extended to cover the bit tip, then dust collection effectiveness is improved, but the bit tip becomes unviewable during chipping operations
Solution Approach 1:
The dust collection cup body is designed with an extendable unit that can dynamically change its axial length between extended and retracted states. This dynamic structure allows the cup to adapt its coverage: extended when dust collection is prioritized, and retracted when bit tip visibility is needed during chipping operations, thus resolving the contradiction between dust collection effectiveness and operational visibility.
Solution Approach 2:
The axial length parameter of the dust collection cup body is made variable through the extendable unit mechanism. By changing the length parameter between two states (extended and retracted), the system can optimize performance for different operational requirements: longer length for dust collection and shorter length for visibility, eliminating the need for multiple fixed-length cups.
2Reliability
If the dust collection cup body is extended for dust collection, then coverage is improved, but the device complexity increases due to multiple cup types
Solution Approach 1:
A single dust collection cup design incorporates both extended and retracted length capabilities through the extendable unit, making it universally applicable for both dust collection operations requiring coverage and chipping operations requiring visibility. This multi-functional design eliminates the need for maintaining multiple specialized cup types in inventory.
Solution Approach 2:
The extendable unit provides dynamic length adjustment within a single cup structure, replacing the static multiple-cup-type system. This dynamic capability allows one cup to perform the functions previously requiring multiple different cups, thereby reducing device complexity and inventory requirements.
3Ease of operation
If the dust collection cup body is retracted to view the bit tip, then visibility is improved, but dust collection effectiveness deteriorates
Solution Approach 1:
The extendable unit enables dynamic adjustment of the cup body length based on operational needs. During chipping operations, the unit retracts to provide visibility of the bit tip while maintaining the attachment structure. During dust collection operations, the unit extends to provide full coverage and effective dust collection, thus resolving the trade-off between visibility and dust collection effectiveness.
Solution Approach 2:
The dust collection cup operates in periodic cycles between extended and retracted states according to the operational requirements. The extendable unit is extended during dust collection phases and retracted during chipping phases, allowing the system to periodically switch between optimizing for dust collection effectiveness and bit tip visibility as needed.
Data Source
AI summary
A dust collection cup allows a bit tip to be viewable without being detached or replaced. A dust collection cup is attachable to a front cylindrical portion of a hammer drill. The dust collection cup in an attached state allows a bit attached to the front cylindrical portion to extend through the dust collection cup. The dust collection cup includes an attachment attachable to the front cylindrical portion, and a body connectable to the attachment. The body includes an extendable unit including at least a portion in an axial direction retaining a predetermined length.