Tool Attachment One-Handed Mounting Mechanism
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Solution Overview
Problem
Existing tool attachments for hand-held machine tools require both hands to mount and lock, making the process cumbersome and complicated due to the need for one hand to slide the attachment and another to rotate the locking sleeve.
Innovation Solution
A tool attachment with an anti-rotation unit and complementary geometrical forms for twist-proof mounting, combined with a spring-loaded locking sleeve that automatically locks and releases, allowing for one-handed operation and secure mounting without manual rotation of the locking sleeve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking sleeve is used to lock the tool attachment on the hand-held machine tool, then the mounting is secure and reliable, but the operation becomes cumbersome and complicated requiring both hands
Solution Approach 1:
The locking element automatically performs the locking function when the tool attachment is mounted on the hand-held machine tool. The locking element is arranged to engage with the locking sleeve such that mounting the attachment automatically actuates the locking mechanism, eliminating the need for separate manual locking operations and enabling one-handed operation while maintaining secure mounting
Solution Approach 2:
The locking function is merged with the mounting operation itself. The locking element and mounting structure are integrated such that the act of mounting the tool attachment simultaneously activates the locking mechanism, combining two separate operations (mounting and locking) into one unified action that maintains reliability while simplifying operation
2Reliability
If a locking sleeve rotation mechanism is used, then the locking position is secure, but the manipulation complexity increases
Solution Approach 1:
The locking element automatically engages with the locking sleeve to secure it in the locking position without requiring user manipulation. The spring element and locking element geometry are designed such that mounting the attachment self-actuates the locking sleeve into its secure position, maintaining reliability while eliminating complex manual manipulation
Solution Approach 2:
The complex rotation manipulation is extracted from the user's task. Instead of requiring the user to rotate the locking sleeve, the system uses the mounting motion itself to drive the locking sleeve into position through the engagement of the locking element, removing the need for separate rotational manipulation while maintaining secure locking
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
Enables easy, secure, and reliable mounting and dismounting of the tool attachment on a hand-held machine tool, improving user convenience and reducing the complexity of the mounting process.
Implementation Method 1
The locking sleeve may be assigned a spring element having a predefined spring force which acts upon the locking sleeve in the direction of an assigned locking position
Implementation Method 2
the locking sleeve is configured—owing to a deflection of the at least one assigned locking element at at least one guide edge of an at least one control element assigned to the fastening unit—to execute a rotational movement
Data Source
AI summary
A tool attachment for mounting on a hand-held machine tool provided with a tool holder, the tool attachment having an output shaft and a base body at whose outer circumference a locking sleeve is disposed in a manner allowing it to rotate to release at least one assigned locking element; at the outer circumference of the base body, an anti-rotation unit is formed for the twist-proof mounting of the base body on a fastening unit assigned to the hand-held machine tool; on the anti-rotation unit and at an inner circumference of the fastening unit, complementary geometrical forms are provided which are configured to mesh with each other for the releasable, twist-proof mounting of the base body on the fastening unit.