Mowing Head Fastening with Axial and Anti-Rotation Locks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing brush cutter assemblies require complex and time-consuming processes for attaching and detaching the mowing head from the output shaft, necessitating the use of additional tools and hindering quick operation.
Innovation Solution
An assembly featuring an anti-rotation lock and axial lock mechanism, accessible via a single actuating element, allows for simple and tool-free attachment and detachment of the mowing head, ensuring secure rotation and easy replacement without the need for additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw connection is used to attach the mowing head to the output shaft, then the connection is secure and reliable, but the attachment and detachment process becomes complex and time-consuming
Solution Approach 1:
The fastening device is segmented into distinct functional components: an axial lock mechanism with holding and locking contours for axial positioning, and a separate anti-rotation lock mechanism with blocking contours for rotational prevention. This segmentation allows each mechanism to perform its specific function independently, enabling secure connection while simplifying the fastening process through a single actuating element that controls both mechanisms simultaneously.
2Stability of the object's composition
If locking pins are provided to fix the output shaft, then the output shaft can be fixed during screwing, but additional tools are required and the operator must always carry them
Solution Approach 1:
The fastening device is designed as a self-contained system that performs all necessary functions without external tools. The single actuating element simultaneously controls the axial lock and anti-rotation lock mechanisms, allowing the operator to secure or release the mowing head with a single operation. The device serves itself by integrating all locking and positioning functions into one unified mechanism that operates without additional tools.
3Stability of the object's composition
If stops are provided to block rotation of the gearing, then the output shaft can be fixed, but the detachment and attachment process becomes complex
Solution Approach 1:
The axial lock and anti-rotation lock mechanisms are merged into a single integrated fastening device controlled by one actuating element. The holding contour and locking contour work together with the blocking contours to provide both axial positioning and rotational prevention simultaneously. This merging reduces device complexity by eliminating the need for separate mechanisms and simplifies operation to a single action that performs multiple functions.
Data Source
AI summary
An assembly includes a mowing head (3), an output shaft (8), and a fastening device (10). The output shaft (8) is drivable in rotation about an axis of rotation (9). The assembly (2) has an anti-rotation lock (11) and an axial lock (16). The mowing head (3) is held corotatingly on the output shaft (8) by the anti-rotation lock (11). The axial lock (16) locks the mowing head (3) in a blocking position (30) of the output shaft (8) against a relative movement in the direction of the axis of rotation (9) of the output shaft (8) and in an inoperative position (31) releases the mowing head (3) for detachment from the output shaft (8). The fastening device (10) includes an actuating element (24) accessible to the operator. The axial lock (16) is switchable into the blocking position (30) and into the inoperative position (31) by the actuating element (24).