Dust Collection Adapter Extension Spindle for Power Tool
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Solution Overview
Problem
The existing power tools, such as disk grinders, face difficulties in attaching and replacing tip tools like grindstone wheels due to insufficient spindle length when a dust collection adapter is attached, leading to poor workability and risk of thread disconnection during tool replacement.
Innovation Solution
A dust collection adapter is designed with an extension spindle that can be coupled to the main body spindle, allowing for sufficient thread length and secure attachment of the tip tool, and includes a lock nut system with a lock button to prevent rotation of the main body spindle during tool replacement, ensuring easy detachment and reattachment without loosening the thread connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dust collection adapter is attached to a power tool with a simple spindle configuration, then dust collection functionality is achieved, but the spindle length becomes insufficient for secure tip tool attachment
Solution Approach 1:
The spindle is divided into two segments: a main body spindle that remains fixed in the power tool, and an extension spindle that can be coupled to the main body spindle. This segmentation allows the dust collection adapter to be attached without permanently extending the main spindle, providing sufficient length for tip tool attachment while maintaining compactness when the extension is removed.
Solution Approach 2:
The extension spindle is designed to be dynamically attachable and detachable from the main body spindle through threaded coupling. This dynamic configuration allows the system to adapt between a compact state (extension removed) and an extended state (extension attached for dust collection), resolving the length contradiction.
2Reliability
If the main body spindle is locked to prevent rotation during tip tool replacement, then thread connection stability is improved, but the complexity of the locking mechanism increases
Solution Approach 1:
The lock button mechanism is designed to be operated by the user without requiring additional tools or complex procedures. When the user presses the lock button, it automatically engages the locking mechanism to prevent spindle rotation, and releases when pulled. This self-service approach provides reliable locking with minimal complexity.
Solution Approach 2:
The locking function is extracted as a separate, independent mechanism from the spindle and thread connection. The lock button and associated locking elements are separate components that provide the locking function without complicating the basic threaded coupling between the extension spindle and main body spindle.
3Ease of operation
If an extension spindle is coupled to the main body spindle to increase thread length, then tip tool attachment capability is improved, but the risk of thread disconnection during operation increases
Solution Approach 1:
The extension spindle is pre-threaded with female threads that match the male threads on the main body spindle. This preliminary preparation ensures that when the extension is coupled to the main body, the thread connection is immediately secure and ready for operation, eliminating the risk of disconnection during use.
Solution Approach 2:
The extension spindle and main body spindle are merged into a unified threaded connection system. The female threads on the extension spindle and male threads on the main body spindle combine to form a secure, integrated connection that behaves as a single structural unit during operation, preventing disconnection.
Data Source
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AI summary
To a power tool main body (10a) to which a main body spindle (17) rotationally driving a tip tool (23) is provided, a dust collection adapter (20) for collecting dusts generated when a material to be ground is processed by the tip tool (23) is held thereto. The dust collection adapter includes: a dust collection fan (31) rotationally driven by the main body spindle (17); and a dust collection cover (32) for containing the dust collection fan (31) and covering a diametrical outside of the tip tool (23). The dust collection fan includes: a fan main body to which a plurality of blade portions (31b) are provided; and a threaded shaft portion (51) provided to a center portion of the fan main body. To the threaded shaft portion, a female thread portion (54) thread-coupled to the main body spindle (17) and a male thread portion (55) thread-coupled to a fastening thread member (28a) for fixing the tip tool (23) are provided.