Driver Drill Ring Assembly With Ball-Mediated Low-Friction Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vibration driver drills face difficulty in rotating mode change rings and clutch rings due to increased friction, making operation cumbersome.
Innovation Solution
Incorporating a sliding member, such as balls, between the mode switching ring and the clutch ring, with optional interposition of plates and washers to reduce friction, allowing for smoother rotation and easier operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mode change ring and change ring are directly contacted without sliding members, then structural simplicity is maintained, but friction force increases making rings difficult to rotate
Solution Approach 1:
The patent introduces sliding members (balls) as intermediary elements between the mode change ring and change ring. These balls are housed in grooves and enable relative rotation between the rings by converting direct sliding friction into rolling friction, significantly reducing the friction force and making the rings easier to rotate while maintaining a relatively simple overall structure.
2Ease of operation
If sliding members are added between rings, then friction is reduced and rotation is easier, but device complexity increases
Solution Approach 1:
The patent segments the contact interface between the mode change ring and change ring by introducing discrete sliding members (balls) in grooves. This segmentation allows the friction reduction function to be localized to specific points rather than requiring a complete redesign of the entire ring structure, thereby reducing rotation difficulty while minimizing the increase in overall device complexity.
3Ease of operation
If balls are used as sliding members, then friction force is significantly reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs spherical balls as sliding members, utilizing their inherent geometric properties to achieve smooth rolling motion. The spherical shape naturally accommodates small variations in positioning and provides consistent contact points, reducing the impact of manufacturing tolerances while maximizing the friction reduction benefit and rotation smoothness.
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 enables the mode switching ring and clutch ring to rotate easily, reducing friction and enhancing operational efficiency and longevity by using balls as sliding members and plates/washers to facilitate smoother movement.
Implementation Method 1
a sliding member, such as balls, between the mode switching ring and the clutch ring
Data Source
AI summary
An electric vibration driver drill as one example of an electric power tool includes the gear housing, the vibration mechanism and the clutch mechanism each located inside the gear housing, the mode switching ring (vibration switching ring) configured to operate the vibration mechanism and rotatably held to the gear housing, the clutch ring (clutch switching ring) configured to operate the clutch mechanism and rotatably held to the housing, and the respective balls located between the mode switching ring and the clutch ring.