Handheld Power Tool Securing Ring and Element
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Solution Overview
Problem
Handheld power tools, such as angle grinders, face increased torque, rotation, and axial forces due to a growing number of accessories, leading to reduced functional reliability and inefficient use of installation space.
Innovation Solution
A securing ring with a recess is used to securely connect the output shaft to the tool, featuring a securing element with a recess that surrounds the ring in the radial direction, enhancing the tool's reliability and allowing for optimized assembly and protection against damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a securing ring is used to hold the output shaft, then the functional reliability is improved, but the installation space is insufficient and assembly is complex
Solution Approach 1:
The securing element is integrated into the transmission gear element, with the securing element's recess nested to surround the securing ring. This nesting approach combines multiple functions into a single integrated structure, improving reliability while reducing the number of separate components and simplifying assembly.
Solution Approach 2:
The securing element is merged with the transmission gear element to form a single integrated component. This merging eliminates the need for separate securing mechanisms, reduces installation space requirements, and simplifies the overall assembly process while maintaining the reliability provided by the securing ring.
2Reliability
If a securing ring is used to hold the output shaft, then the functional reliability is improved, but the available installation space is reduced
Solution Approach 1:
The securing element's recess is nested around the securing ring in the radial direction, creating a compact arrangement where the securing mechanism is integrated within the existing component boundaries. This nesting minimizes the additional space required while ensuring the securing ring is properly held.
Solution Approach 2:
By merging the securing element with the transmission gear element, the patent eliminates the need for separate securing components that would occupy additional installation space. The integrated design achieves the same reliability function within the existing spatial constraints.
3Reliability
If a securing ring is used to limit axial movement, then the reliability is improved, but the assembly process becomes more difficult
Solution Approach 1:
The securing element is positioned to nest around the securing ring, with its recess surrounding the ring in the radial direction. This nested configuration allows the securing ring to be installed in a straightforward manner while maintaining reliable axial movement limitation.
Solution Approach 2:
The integration of the securing element with the transmission gear element simplifies the assembly process by reducing the number of separate components that need to be installed and secured. The merged design maintains the reliability function while making the overall assembly more manageable.
Data Source
AI summary
A handheld power tool includes an output shaft, a drive unit, a securing ring, and a securing element. The output shaft is configured to be releasably connected to an insert tool of the handheld power tool. The drive unit is configured to transmit a movement to the output shaft. The securing element is configured to secure the securing ring. The securing element has a recess which is provided to surround the securing ring in the radial direction in at least one operating state.