Form-Fitting Stripping Elements for Ground Milling Machines
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Solution Overview
Problem
The assembly of stripping elements on a ground milling machine's stripping device is complex due to slippage issues during mounting, which can lead to improper alignment and increased wear, and existing force transmission methods are prone to failure under high shearing forces.
Innovation Solution
A form-fitting connection between the stripping elements and the stripping plate, using complementary form-fitting elements that prevent slippage and ensure accurate positioning, combined with a mounting device that relieves shearing forces by aligning through bores for secure screw insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mounting devices with screw-threaded holes are used to attach stripping elements to the stripping plate, then the stripping elements can be secured to the plate, but slippage occurs during assembly and operation leading to misalignment and increased wear
Solution Approach 1:
The form-fitting elements are designed to preliminarily position the stripping elements on the stripping plate before final screw fastening. The complementary geometric shapes (protrusions and recesses) create a pre-alignment mechanism that guides the stripping elements into their correct positions, preventing slippage during subsequent screw insertion and operation.
Solution Approach 2:
The form-fitting elements act as intermediary structures between the stripping elements and the stripping plate. These intermediate geometric features (protrusions fitting into recesses) mediate the connection by providing both positioning and anti-slippage functions that the screw-threaded holes alone cannot achieve.
2Duration of action of stationary object
If multiple individual stripping elements are used to protect the stripping plate edge, then wear protection is improved and cost savings are achieved by replacing only worn elements, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The form-fitting elements are pre-configured on both the stripping elements and the stripping plate to create self-aligning connection points. This preliminary geometric configuration eliminates the need for complex alignment procedures during assembly, allowing workers to quickly install individual stripping elements without time-consuming adjustment and repositioning.
Solution Approach 2:
The complementary form-fitting elements create a self-aligning system where the stripping elements automatically find their correct positions on the stripping plate through the geometric interlocking of protrusions and recesses. This self-service mechanism eliminates the need for external alignment tools or complex procedures, significantly reducing assembly time.
3Force
If conventional mounting devices are used to secure stripping elements, then the elements can be attached to the stripping plate, but high shearing forces cause screw failure and mounting device failure
Solution Approach 1:
The form-fitting elements are designed to preliminarily bear and distribute the mechanical loads before the screws are fully tightened. The geometric interlocking of protrusions and recesses creates a load-path that distributes shearing forces across multiple contact points, reducing the peak forces on individual screws and preventing screw failure under high stress conditions.
Data Source
AI summary
The present invention relates to a stripping device for a ground milling machine, comprising a stripping plate comprising a bottom plate edge and a stripping bar comprising at least one stripping element disposed on the bottom plate edge, wherein form-fitting elements are present on the at least one stripping element and on the stripping plate, which form-fitting elements at least partially interlock in complementary fashion and prevent displacement of the at least one stripping element. The present invention further relates to a stripping element for such a stripping device, and to a ground milling machine having such a stripping device.