Adjustable Dust Collection Hood for Variable-Length Tool Bits
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Solution Overview
Problem
Conventional dust collecting devices for impact tools are inefficient when used with tool bits of varying lengths, as the fixed position of the dust suction port leads to reduced dust collection efficiency.
Innovation Solution
A dust collecting device with a bit covering formed by cylindrical members that can be adjusted in the axial direction, allowing the dust suction port to be positioned correctly relative to the tool bit, regardless of its length, through a mechanism of threaded engagement and elastic deformation, ensuring effective dust collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dust suction port is fixed in position, then the device structure is simple, but the dust collection efficiency is reduced when using tool bits of different lengths
Solution Approach 1:
The dust collecting hood is designed with telescopic cylindrical members that can move relative to each other in the axial direction, allowing the dust suction port position to be dynamically adjusted according to the length of the tool bit being used, thereby resolving the contradiction between adaptability and structural simplicity
Solution Approach 2:
The dust collecting hood is divided into multiple cylindrical members (first cylindrical member, second cylindrical member, etc.) that can move independently relative to each other, enabling flexible position adjustment of the dust suction port while maintaining a relatively simple overall structure
2Productivity
If the dust suction port position is adjusted, then dust collection efficiency is improved, but the device complexity increases
Solution Approach 1:
The telescopic structure with multiple cylindrical members that can move relative to each other allows the dust suction port to be positioned at different locations along the axial direction, improving dust collection efficiency for various tool bit lengths while using a relatively simple mechanical adjustment mechanism
Solution Approach 2:
The cylindrical members are nested within each other (first cylindrical member within second cylindrical member), allowing compact storage when not in use and enabling position adjustment through simple relative movement without complex mechanisms
3Reliability
If cylindrical members are moved relative to each other in the circumferential direction for engagement, then engagement stability is maintained during operation, but the adjustment operation becomes more complex
Solution Approach 1:
The engagement structure uses projections and recesses that can be engaged or disengaged by relative circumferential movement of the cylindrical members, providing stable engagement during operation while allowing simple adjustment when needed
Solution Approach 2:
The engagement mechanism allows for periodic engagement and disengagement of the cylindrical members through circumferential movement, enabling stable operation during use and simple adjustment when required
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 device can accommodate tool bits of different lengths without reducing dust collection efficiency, maintaining engagement stability during tool operation and improving visibility and ease of use.
Implementation Method 1
a female thread is formed in one of the cylindrical members and an engagement projection is formed on the other and engages with the female thread, and when turned relative to each other in the circumferential direction, the cylindrical members can be moved relative to each other in the axial direction by engagement between the female thread and the engagement projection
Implementation Method 2
The projection and the recess are engaged and disengaged by elastic deformation of the cylindrical members
Data Source
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AI summary
In a dust collection device that collects dust particles that an impact tool generates, disclosed is a feature that can accommodate the lengths of tool bits that are mounted to the impact tool when a machining operation is executed by exchanging tool bits of different lengths. The dust collection device (140) collects dust that the impact tool (101) generates and is attached to said impact tool (101) that, in the lengthwise direction, linearly operates the tool bit (119) mounted to the end region of a tool body (103). The dust collection device (140) has a dust intake port (141a) that sucks dust, and said dust intake port (141a) can be repositioned in the lengthwise direction of the tool bit (119) in accordance with the length in the lengthwise direction of said tool bit (119).