Impact Drill Mode Switching With Leak-Resistant Clutch Structure
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Solution Overview
Problem
Existing impact drills have complex conversion structures that lead to oil leakage when switching between drilling and impact modes, as multiple parts traverse the housing, making the design prone to grease leakage and complicating the mechanism.
Innovation Solution
A simplified design where a movable element along a first line switches the impact drill between modes, with a stopping element and elastic members to control axial movement, preventing grease leakage by limiting movement to a single path through the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conversion structure is used to switch between drilling and impact modes, then the impact drill can realize mode conversion, but the structure becomes complicated and oil leakage occurs easily
Solution Approach 1:
The patent combines the mode conversion function with the existing clutch mechanism. The clutch mechanism integrates both the drilling mode engagement and impact mode conversion functions, eliminating the need for a separate conversion structure. This merging of functions reduces structural complexity while maintaining adaptability.
Solution Approach 2:
The clutch mechanism is designed to perform multiple functions: it engages/disengages the drill bit for drilling mode and simultaneously controls the conversion to impact mode. This multi-functional design eliminates dedicated conversion components, simplifying the overall structure.
2Adaptability or versatility
If multiple parts traverse the housing for mode conversion, then the conversion function is achieved, but grease leakage occurs easily
Solution Approach 1:
By merging the mode conversion function into the existing clutch mechanism that already operates within the housing, the patent eliminates the need for additional parts to traverse the housing. This reduces the number of potential leakage points while maintaining mode switching functionality.
Solution Approach 2:
The patent extracts the mode conversion function from separate external components and integrates it into the internal clutch mechanism. This extraction eliminates the need for parts to traverse the housing boundary, thereby preventing grease leakage.
3Adaptability or versatility
If a complex conversion structure is used, then mode switching is achieved, but the housing structural integrity is compromised
Solution Approach 1:
The patent merges the mode conversion function into the existing clutch mechanism, eliminating the need for separate conversion structures that would require additional housing openings or modifications. This preserves the housing's structural integrity while maintaining mode switching capability.
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 solution allows for seamless switching between drilling and impact modes without grease leakage, enhancing the structural integrity and service life of the impact drill by maintaining a more straightforward and reliable mechanism.
Implementation Method 1
an elastic member (330) between the first impact block (310) and the second impact block (320)
Data Source
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AI summary
The disclosure discloses an impact drill. The impact drill includes an output shaft (200) capable of rotating around a first axis and moving along the first axis; a housing; a first impact block (310) fixedly connected to the output shaft; a second impact block (320); a stopping element (350) for stopping the output shaft from moving backward; and a movable element (340) mounted on the housing; wherein the housing is formed with a through hole for accommodating the movable element, the through hole passes through the housing in a first line, and the movable element is capable of moving to a first position and a second position along the first line; wherein when the movable element moves to the first position, the movable element prevents the output shaft from moving backward; and wherein when the movable element moves to the second position, the movable element allows the output shaft to move backward.