Auger Segment Recessed Fastener Design for Paving Machines
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Solution Overview
Problem
The replacement of worn auger segments in paving machines is challenging due to limited accessibility and buildup of asphalt material around fastening interfaces, requiring cumbersome manual operations and potential damage to the auger shaft.
Innovation Solution
The design of auger segments with recessed receptacles and channels for bolt and nut fasteners, allowing for single-handed installation and removal using a single wrench, and featuring a flight that extends between receptacles to reduce material buildup and protect fasteners from abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional auger segment design with exposed fastening interfaces is used, then the structure is simple, but the accessibility for replacement is limited and manual labor is intensive
Solution Approach 1:
The auger segment is divided into functional zones with recessed receptacles that create discrete access points for fasteners. This segmentation allows mechanics to access and manipulate individual fasteners without needing to crawl underneath the entire auger assembly, effectively breaking down the replacement task into manageable portions.
Solution Approach 2:
The fastening interfaces are moved from a planar surface to a three-dimensional recessed structure. By creating receptacles that extend inward from the outer surface, the design provides vertical clearance and lateral access, allowing mechanics to reach fasteners from multiple angles without disassembling surrounding components.
2Reliability
If traditional auger segment design is used, then manufacturing is simpler, but asphalt material builds up around fastening interfaces causing wear and damage
Solution Approach 1:
The vulnerable fastening interfaces are extracted from the exposed outer surface and relocated into protected recesses. This extraction removes the fasteners from the direct path of abrasive asphalt material flow, isolating them in a sheltered environment that prevents contact with harmful particles.
Solution Approach 2:
The recessed receptacles and channels act as intermediary structures between the abrasive asphalt environment and the vulnerable fasteners. These geometric features serve as protective mediators that allow the fastening function to occur while shielding the interface from direct exposure to wear-causing materials.
3Productivity
If auger segments require two wrenches on opposite sides, then fastening is secure, but manual labor and time consumption increase
Solution Approach 1:
The receptacle design merges the functions of fastener retention and tool access into a single geometric feature. By configuring the receptacle to accommodate the wrench head while providing lateral clearance, the design allows the tightening and loosening operations to be performed from one side, combining what were previously separate operations into a single accessible interface.
Data Source
AI summary
An auger segment can comprise a base having a first end, a second end opposite the first end in a length direction of the base, a first side, and a second side opposite the first side; a first receptacle projecting from the first side of the base; a second receptacle projecting from the first side of the base; and a flight projecting from the first side of the base between the first receptacle and the second receptacle. A first recess of the first receptacle can be defined by a first sidewall thereof and a second recess of the second receptacle can be defined by a second sidewall thereof. A first through hole can extend through the base in the first recess of the first receptacle and a second through hole can extend through the base in the second recess of the second receptacle.