Extendable Scarifier System for Motor Grader Visibility
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Solution Overview
Problem
Mid-mount scarifier systems on motor graders face visibility and reach limitations, obstructed by other systems and frames, making operation difficult and requiring extra passes, which can damage fresh concrete or be time-consuming.
Innovation Solution
An extendable scarifier system with first and second drawbar arms and a carriage supporting teeth, featuring extension elements attached to the lateral ends of the carriage body, allowing the scarifier to extend beyond the motor grader's frame and increase its width, enhancing visibility and reach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mid-mount scarifier system is positioned between the cab and front wheels, then it can be mounted on the motor grader frame, but the operator's view of the scarifier is obstructed by the frame, hydraulic systems, and other implement systems
Solution Approach 1:
The scarifier system is repositioned from a mid-mount configuration to a rear-mount configuration on the motor grader frame. This spatial relocation changes the dimensional arrangement of components, allowing the scarifier to be positioned behind the cab and other obstructing systems, thereby eliminating visibility obstructions for the operator while maintaining functional effectiveness.
2Productivity
If a scarifier system has a limited reach, then it can be kept compact, but it requires extra passes to spread material close to curbs, which is time-consuming and may damage fresh concrete
Solution Approach 1:
The scarifier system incorporates an extendable carriage mechanism that allows dynamic adjustment of the scarifier's reach. The carriage can be extended forward to increase the working reach for spreading material close to curbs and retracted to a compact position when extended reach is not needed, providing versatility and eliminating the need for multiple passes while preventing concrete damage.
3Length of moving object
If the scarifier system is positioned closer to the front wheels for better reach, then material can be spread closer to curbs, but the operator's visibility of the scarifier is further obstructed
Solution Approach 1:
The scarifier system achieves extended reach through a rear-mount configuration with an extendable carriage mechanism, rather than positioning the entire system closer to the front wheels. This approach extends the working reach in the longitudinal dimension while maintaining a rearward position that preserves operator visibility, resolving the contradiction between reach and visibility.
Data Source
AI summary
A motor grader includes a frame and an extendable scarifier system supported on the frame. The scarifier system includes first and second drawbar arms coupled to the frame. A carriage is coupled to the first and second drawbar arms. The carriage includes a carriage body having first and second lateral ends. A first extension element is attached to the first lateral end of the carriage body and a second extension element is attached to the second lateral end of the carriage body. The first and second extension elements each supporting at least one tooth.