Chisel Holder Wear Protection and Segmentation
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Solution Overview
Problem
Existing chisel holders in soil working machines, such as surface miners and road milling machines, face issues with premature wear and breakage due to abrasive attacks, leading to high tool costs and machine downtimes, as the wear condition of chisels is often not recognized in time, resulting in costly replacements and extended downtime.
Innovation Solution
A chisel holder with a wear protection element featuring hard material elements that provide emergency running properties, allowing the machine to continue operation without damaging the chisel holder, and a carrier system that can be easily exchanged and retrofitted, ensuring minimal downtime by allowing the use of new, unworn holders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the chisel holder is made massive and durable to withstand abrasive attacks, then the strength and reliability are improved, but the cost and time for replacement increase significantly when wear occurs
Solution Approach 1:
The chisel holder is divided into two separable parts: a durable base part that remains mounted on the milling drum tube, and a removable chisel holder part that can be quickly exchanged. This segmentation allows the expensive base part to be reused while only replacing the cheaper chisel holder part, reducing replacement time and cost.
Solution Approach 2:
A connector piece serves as an intermediary component between the base part and the chisel holder part. This connector enables quick attachment and detachment of the chisel holder part without requiring separation of the entire assembly from the milling drum tube, facilitating rapid replacement while maintaining structural integrity.
2Ease of operation
If the chisel holder is designed for easy replacement to reduce downtime, then the ease of operation is improved, but the cost of replacement increases
Solution Approach 1:
The chisel holder is divided into two separable parts: a durable base part that remains mounted on the milling drum tube, and a removable chisel holder part that can be quickly exchanged. This segmentation allows the expensive base part to be reused while only replacing the cheaper chisel holder part, reducing replacement time and cost.
Solution Approach 2:
The chisel holder part is designed as a relatively inexpensive component that can be frequently replaced, while the expensive base part serves as a reusable platform. This approach makes the replacement process economically viable by sacrificing only the low-cost chisel holder part rather than the entire assembly.
3Reliability
If wear protection elements are added to prevent damage to the chisel holder, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The wear protection element is pre-installed on the chisel holder part before it is mounted on the base part. This preliminary preparation ensures that the protection is already in place when the chisel holder is assembled, preventing damage during operation without requiring complex integrated protection mechanisms.
Solution Approach 2:
The wear protection element acts as an intermediary between the chisel holder part and the abrasive environment. It absorbs the abrasive attacks and wear, protecting the chisel holder part and base part from direct damage, thereby extending their service life without adding complex structural elements.
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
The solution effectively prevents severe damage to the chisel holder and reduces machine downtime by enabling quick replacement of worn chisels, thereby minimizing costs and maintaining operational reliability.
Implementation Method 1
the hard material element with its emergency running property prevents severe damage to the chisel holder from the abrasive attack
Data Source
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AI summary
The invention relates to a chisel holder for a ground-processing machine, in particular a surface miner, a road-milling machine or the like, comprising a holding extension which has a chisel receptacle and/or bears a cutting element. In order to improve the operational reliability of a ground-processing machine, it is proposed according to the invention that the holding extension has, behind the cutting element or behind a receiving region of the chisel receptacle, as viewed in the tool advance direction, a wear protection element with a hard material element for fulfilling an emergency running property.