Tool Holder Locking Unit With Parallel Spring Holder Layout
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Solution Overview
Problem
Existing hand-held power tools with locking units have a bulky design due to the perpendicular arrangement of the spring holder relative to the axis of rotation, which complicates the arrangement and stability of the locking elements.
Innovation Solution
The spring holder is arranged approximately parallel to the axis of rotation of the tool holder, allowing for a compact and stable locking unit design with improved alignment and support of the spring element, enhancing the reliability and simplicity of the locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spring holder is arranged perpendicular to the axis of rotation of the tool holder, then the locking element can be pressed into the receiving sleeve, but the locking unit becomes bulky and the arrangement of locking elements is complicated
Solution Approach 1:
The spring holder is reoriented from a perpendicular arrangement to a parallel arrangement relative to the axis of rotation of the tool holder. This dimensional change in orientation allows the spring element to be arranged more compactly along the axial direction, reducing the radial footprint of the locking unit and simplifying the overall structure while maintaining the locking function
2Ease of operation
If the spring holder is arranged perpendicular to the axis of rotation, then the locking mechanism can function, but the travel distance for unlocking is increased
Solution Approach 1:
By changing the orientation of the spring holder from perpendicular to parallel with the axis of rotation, the spring element's compression and extension occur along a shorter axial path. This dimensional reorientation reduces the travel distance required for the locking element to move between locked and unlocked positions, improving operational efficiency without increasing the locking unit's volume
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
This arrangement facilitates a compact and robust locking unit with reduced travel distance for unlocking, ensuring secure and reliable operation of the locking mechanism.
Implementation Method 1
a locking unit for locking and unlocking an insert tool (140) which can be disposed in the receiving sleeve (299), wherein the locking unit is associated with at least one locking element (245) pressed by a spring element (246)
Data Source
AI summary
A hand-held power tool has a housing, in which a drive motor and a gear box for driving a tool holder are arranged. The tool holder is provided with a receiving sleeve, and with a locking unit for locking and unlocking an insert tool which can be disposed in the receiving sleeve. The locking unit is associated with at least one locking element pressed by a spring element. The receiving sleeve includes a spring holder for receiving the spring element. The spring holder is disposed at least approximately parallel to an axis of rotation of the tool holder.