Modular Motor Grader Drawbar Assembly for Lower Inventory Cost
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Solution Overview
Problem
The existing drawbar assemblies for motor graders are expensive to manufacture and maintain due to their uniform design across various models, leading to high inventory costs and the need for entire assembly replacement for minor damages, despite being prone to heavy stresses during operations.
Innovation Solution
A two-piece drawbar assembly design comprising a first and second frame member joined at a connection joint, allowing for flexibility in manufacturing different models by keeping the second frame member common and varying the first frame member in length, with a mounting member to support the circle assembly, reducing manufacturing costs and enhancing stress protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform drawbar assembly design is used across all motor grader models, then manufacturing consistency is improved, but inventory costs and manufacturing expenses increase
Solution Approach 1:
The drawbar assembly is divided into two separate frame members (first frame member and second frame member) that can be manufactured independently and then joined together. This segmentation allows different models to share common components (second frame member) while having model-specific components (first frame member), reducing inventory costs while maintaining manufacturing consistency.
Solution Approach 2:
The second frame member is designed as a universal component that can be used across multiple motor grader models. By making this portion common to all models, the invention reduces the variety of parts that need to be manufactured and stored, thereby reducing inventory costs while maintaining ease of manufacture through standardized production processes.
2Reliability
If the entire drawbar assembly is replaced for minor damage, then reliability is maintained, but manufacturing costs and maintenance expenses increase
Solution Approach 1:
By dividing the drawbar assembly into two replaceable frame members, the invention enables selective replacement of only the damaged portion rather than the entire assembly. This maintains structural integrity through proper connection joints while reducing manufacturing and maintenance costs by allowing partial replacement.
Solution Approach 2:
The modular design allows the undamaged portion of the drawbar assembly to be recovered and reused after replacing only the damaged frame member. This reduces waste and manufacturing costs by maximizing the utilization of intact components while maintaining reliability through replacement of damaged parts.
3Ease of manufacture
If a modular two-piece design is used, then manufacturing flexibility and cost are improved, but connection joint complexity increases
Solution Approach 1:
While segmentation into two frame members provides manufacturing flexibility, the connection joint between them is designed to be relatively simple compared to alternative designs. The mating portions are configured to join the frame members with minimal complexity, avoiding the need for complex gussets or reinforcement structures.
4Strength
If traditional box-like beam design is used, then structural strength is maintained, but stress uniformity and manufacturing efficiency are reduced
Solution Approach 1:
The drawbar is segmented into two frame members with simplified geometries compared to traditional box-like beams. This segmentation maintains structural strength through proper connection joints while improving manufacturing efficiency by allowing simpler, more efficient production processes for each individual member.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces manufacturing costs by allowing the same second frame member to be used across multiple models and provides strong stress protection through a welded connection joint, eliminating the need for complex gussets and enabling efficient production and maintenance.
Implementation Method 1
The first mating portion is joined to the second mating portion to form a connection joint therebetween
Data Source
AI summary
A drawbar assembly for a motor grader is provided. The drawbar assembly defines a longitudinal axis and includes a first frame member and a second frame member. The first frame member is adapted to be movably coupled to main frame of the motor grader. The first frame member includes a first base member extending along longitudinal axis and a first mating portion bent away relative to first base member to extend transversely relative to longitudinal axis. The second frame member includes a second base member extending along longitudinal axis and a second mating portion bent away relative to second base member to extend transversely relative to longitudinal axis. The second mating portion is configured to mate with first mating portion to form a connection joint therebetween, facilitating the first frame member and second frame member to be conjoined to together support a circle assembly of the motor grader thereunder.