Removable Cutting Disc With Segmented Bits
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Solution Overview
Problem
Existing cutting mechanisms for mining or excavating rock face challenges in efficiently engaging and removing rock due to wear and damage, and require improved methods for securing and servicing cutting members.
Innovation Solution
A cutting device with a disc body and multiple cutting members, each with a peripheral edge and cutting bits, is designed. The cutting members are releasably secured to the disc body via carrier openings and posts, allowing for easy removal and replacement using wedge slots and jacking bolts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cutting members are permanently fixed to the disc body, then structural stability is improved, but ease of repair deteriorates as worn cutting members cannot be easily replaced
Solution Approach 1:
The cutting member is divided into a body portion and removable cutting bits. The cutting bits can be independently replaced from the body portion through the carrier opening, allowing maintenance without replacing the entire cutting member. This segmentation enables selective replacement of worn components while retaining the structural integrity of the body portion.
Solution Approach 2:
The cutting member transitions from a permanently fixed state to a dynamically removable state through the carrier opening mechanism. The opening allows the cutting member to be inserted and secured during operation, then removed when cutting bits wear down, enabling flexible maintenance cycles without compromising structural stability during use.
2Ease of repair
If cutting members are made removable for easy servicing, then ease of repair is improved, but device complexity increases due to additional securing mechanisms
Solution Approach 1:
The securing function is extracted from a complex multi-component fastening system and simplified to a single carrier opening mechanism. The opening itself serves as both the insertion path and the securing feature, eliminating the need for separate screws, clips, or locking mechanisms while maintaining ease of removal and reinstallation.
Solution Approach 2:
The carrier opening mechanism is designed to be self-securing through its geometric configuration. The opening's shape and position naturally guide the cutting member into a secured state during insertion, without requiring additional active securing components. The design serves itself by using the opening's structure to provide both access and retention functions.
3Manufacturing precision
If cutting bits are aligned across adjacent cutting members, then cutting precision is improved, but device complexity increases due to precise positioning requirements
Solution Approach 1:
The carrier opening serves multiple functions: it guides the cutting member into position, secures the cutting member during rotation, and ensures proper alignment of cutting bits across adjacent members. This universal positioning mechanism achieves precise alignment without requiring separate alignment features, reducing overall device complexity while maintaining manufacturing precision.
Data Source
AI summary
A cutting device for engaging a rock face includes a disc body, receiving portions disposed circumferentially about an outer perimeter of the disc body, and cutting members. The disc body is supported for rotation about an axis of rotation. Each of the receiving portions includes a receiving surface and a plurality of carrier openings extending through the receiving surface. Each of the cutting members includes a peripheral edge and a plurality of cutting bits positioned on the peripheral edge. Each of the cutting members further includes a plurality of posts. Each of the plurality of posts engages an associated one of the plurality of carrier openings to releasably secure the cutting member against rotation relative to the receiving portion.