Boltless Retention System for Bulldozer Cutting Edges
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for attaching cutting edges to bulldozers and similar equipment require mechanics to torque multiple bolts, which can be hazardous due to the high force needed and the risk of the cutting edges falling, necessitating a safer and more efficient attachment method.
Innovation Solution
A boltless retention system using a lock, retainer, and pin configuration that allows for easy attachment and detachment of cutting edges by rotating a retainer ninety degrees using a square driver, eliminating the need for torqueing bolts and reducing the risk of injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple bolts are used to attach cutting edges, then the attachment is secure, but the operation becomes complex and hazardous requiring mechanics to work under the blade with high force
Solution Approach 1:
The retention system is divided into separate functional components: a retainer that receives the cutting edge, a lock that secures the retainer, and a simple rotational locking mechanism. This segmentation allows each component to perform its specific function with simple actions rather than requiring multiple bolts to be tightened with high force
Solution Approach 2:
The complex mechanical system of multiple bolts requiring torque tools and high force is replaced with a simplified rotational locking mechanism. The lock rotates into a locked position to secure the cutting edge, eliminating the need for mechanics to work under the blade with dangerous forces
2Strength
If high force is applied to torque bolts, then the cutting edges are securely attached, but the risk of injury increases and cutting edges may fall
Solution Approach 1:
The potential harm of high-force operations is eliminated by designing a system where security is achieved through geometric locking and rotational engagement rather than forceful tightening. The lock mechanism converts the potential hazard of high-force bolt torque into a safe rotational motion that achieves secure attachment without danger to mechanics
Solution Approach 2:
The design incorporates preliminary safety features where the lock and retainer are configured to prevent accidental release or falling of cutting edges. The rotational lock engages in a predetermined locked position that inherently prevents the cutting edge from detaching, eliminating the need for mechanics to apply high force that could cause injury
3Strength
If multiple bolts are used for attachment, then the cutting edges remain secure, but the time required for attachment and detachment increases
Solution Approach 1:
The retainer is pre-configured with the locking mechanism in place before the cutting edge is installed. The lock is designed to be quickly rotated into the locked position after the cutting edge is inserted, eliminating the time-consuming process of tightening multiple bolts while maintaining secure attachment
Solution Approach 2:
The system transitions from a static bolted connection requiring multiple tightening operations to a dynamic rotational locking mechanism. The lock can be quickly rotated into and out of the locked position, enabling rapid attachment and detachment of cutting edges while maintaining security through the rotational engagement
Data Source
AI summary
A retainer for attaching a work member or a wear member to an implement of a machine includes a wavy annular body defining a central axis, and at least one detent. A tab extends axially away from the wavy annular body.