Interchangeable Holder System for Chisels
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Solution Overview
Problem
Existing interchangeable holder systems for construction machines are bulky, leading to high power requirements and increased costs, and face challenges with corrosion and complex manufacturing processes, particularly due to broad fitment tolerances and difficult access to the joint between the basic module and the interchangeable holder.
Innovation Solution
The system features a basic module with forward and rearward contact surfaces and a stopping step, allowing the interchangeable holder to be attached flatly without insertion into a bore, utilizing a wedge-shaped design for secure positioning and a securing device with a female thread for reliable engagement, reducing material and weight while simplifying assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interchangeable holder is pushed into an insertion bore in the basic module for mounting, then the holder can be securely positioned, but the system becomes bulky and requires high power
Solution Approach 1:
The patent removes the interchangeable holder from the insertion bore configuration and positions it on the outer peripheral surface of the basic module. This extraction of the holder from the bore structure eliminates the need for deep insertion and reduces the overall bulk of the system, thereby lowering power requirements while maintaining secure positioning through the stopping step mechanism.
Solution Approach 2:
The patent transitions from a radial insertion configuration (pushing holder into bore) to a tangential positioning configuration (placing holder on outer surface). This dimensional change allows the holder to be secured through the stopping step that limits axial movement, achieving reliable positioning without the bulk and power requirements of deep bore insertion.
2Ease of manufacture
If the interchangeable holder system uses broad fitment tolerances for assembly, then manufacturing is simpler, but the joint between basic module and holder becomes difficult to access
Solution Approach 1:
The patent segments the mounting interface into distinct functional elements: the stopping step for axial positioning, the outer peripheral surface for holder placement, and the insertion bore for tool access. This segmentation allows broad fitment tolerances in the overall assembly while maintaining accessible joints, as each component has a dedicated function that does not require tight tolerances for proper operation.
3Strength
If the interchangeable holder is mounted on the basic module with traditional insertion methods, then secure connection is achieved, but material usage and weight increase
Solution Approach 1:
The stopping step is designed to automatically limit the axial insertion depth of the interchangeable holder into the basic module without requiring additional locking mechanisms or excessive material. The holder self-positions at the correct depth through the stopping step's geometric constraint, achieving secure connection with minimal material usage and reduced weight.
Data Source
AI summary
The present invention relates to an interchangeable holder system comprising a basic module and an interchangeable holder for the accommodation of a cutting tool, which interchangeable holder is capable of being attached to the basic module, for the purpose of preparing ground surfaces, and to a construction machine, more particularly a stabilizer, a recycler, or a cold milling machine, comprising a milling device comprising such an interchangeable holder system.