Power Drill Adjusting Element for Compact Clutch and Impact Mechanism
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Solution Overview
Problem
Existing power drills require complex mechanisms for impact drilling and clutch function, leading to increased axial length, tolerance sensitivity, and higher costs due to the need for multiple components like locking pins and cam rings.
Innovation Solution
A single adjusting element is used to both engage and disengage the clutch and axial bearing, eliminating the need for locking pins and enabling a compact design by axially fixing or releasing the transmission element and bearing element based on the drilling mode, with a stable transmission housing and equidistantly spaced spacer elements for force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If locking pins and cam rings are used to activate impact mechanism and deactivate clutch function, then the impact drilling function can be activated, but the axial length of the power drill increases and the design becomes tolerance sensitive
Solution Approach 1:
The patent combines the impact mechanism activation and clutch function deactivation into a single integrated adjusting element. This adjusting element simultaneously performs both functions that were previously handled by separate components (locking pins and cam rings), thereby reducing the overall axial length while maintaining the impact drilling capability.
Solution Approach 2:
The adjusting element is designed as a multi-functional component that serves multiple purposes: it activates the impact mechanism, deactivates the clutch function, and provides axial positioning. This universal component replaces several specialized parts, reducing complexity and axial length while maintaining all required functions.
2Adaptability or versatility
If locking pins and multiple components are used for clutch locking, then the clutch function can be deactivated, but the part count increases and manufacture becomes more expensive
Solution Approach 1:
The patent merges the clutch locking function with the impact mechanism activation into a single adjusting element. This eliminates the need for separate locking pins and reduces the number of components required, thereby simplifying manufacturing and reducing costs while maintaining the clutch locking capability.
Solution Approach 2:
The adjusting element is designed as a universal component that handles both clutch locking and impact mechanism activation. This multi-functional approach reduces the total part count, simplifies assembly, and lowers manufacturing costs compared to using multiple specialized components.
Data Source
AI summary
The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position.