Ripper Tip Lock and Retainer Assembly for Low-Material Retention
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Solution Overview
Problem
Existing retention systems for attaching ripper tips to motor graders require additional material, increasing cost and complexity, and are difficult to repair when damage occurs.
Innovation Solution
A retention system featuring a lock and retainer assembly that allows for easy attachment and detachment of ripper tips by rotating a retainer 90 degrees using a square driver, minimizing material usage and simplifying repairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a boss is added to the tool adaptor to enable retention, then the retention function is achieved, but the material cost increases and the tool adaptor becomes more difficult to repair
Solution Approach 1:
The retention system is divided into separate components: the lock mechanism is separated from the tool adaptor, allowing the adaptor to remain simple without bosses. The lock receives the boss and performs the retention function, while the adaptor only provides mounting holes, reducing material usage and repair complexity.
Solution Approach 2:
The lock acts as an intermediary component between the tool adaptor and the ground engaging tool. Instead of modifying the adaptor with bosses, the lock mediates the connection by receiving the boss from the tool and securing it to the adaptor through a separate retention mechanism.
2Reliability
If a boss is added to the tool adaptor for retention, then the retention function is achieved, but the device complexity increases
Solution Approach 1:
The system is segmented into the tool adaptor, lock, and ground engaging tool as separate functional units. The adaptor remains simple with only mounting holes, while the lock contains the retention mechanism, reducing overall device complexity at the adaptor level.
Solution Approach 2:
The complex retention mechanism (lock with boss reception and retention features) is extracted from the tool adaptor and placed in a separate component. This extraction simplifies the adaptor design while maintaining the retention function in the lock component.
3Ease of operation
If the lock is rotated 90 degrees for attachment, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The lock and tool adaptor feature asymmetric geometric profiles that must be rotated to specific orientations for proper engagement. This asymmetry provides tactile and visual cues for correct positioning, making the 90-degree rotation operation intuitive while maintaining manufacturing precision through form-fitting interfaces.
Data Source
AI summary
A work tool or a wear member includes a working portion or a wear portion, a hollow portion that further defines a lock receiving aperture defining an axis of rotation, a radial direction, and a circumferential direction. The axis of rotation is transverse to the direction of assembly of work tool or wear member as the member is slid over a nose portion of a tool adaptor or the like. The axis of rotation is spaced away from the direction the pin receiving thru-hole extends a predetermined distance measured along the direction of assembly.