Work Vehicle Counterweight Cover Positioning
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Solution Overview
Problem
In work vehicles with counterweights, dimensional errors in column and beam members make it difficult to accurately position cover members relative to the counterweight, affecting the accuracy and ease of installation.
Innovation Solution
The cover member is supported by a first frame portion comprising a beam member and a concave portion of the counterweight, reducing the need for multiple column members and preventing positional errors, while a second frame portion is independently attached to the main body frame to minimize vibration and enhance sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple column members and beam members are used to support the cover member, then the cover member can be supported structurally, but dimensional errors in these members cause inaccurate positioning of the cover member relative to the counterweight
Solution Approach 1:
The invention extracts the cover member support function from the main body frame structure and relocates it to the counterweight structure. By making the cover member supported by the counterweight's top surface and rear surface directly, the support function is separated from the column and beam members that cause dimensional errors, thus eliminating the positioning accuracy problem while maintaining structural support.
Solution Approach 2:
The invention introduces the counterweight as an intermediary structure between the cover member and the main body frame. The cover member is positioned by the counterweight's top surface and rear surface, which serve as precise reference surfaces. This intermediary structure provides accurate positioning without being affected by dimensional errors in the column and beam members.
2Reliability
If column members and beam members are used to support the cover member, then structural support is achieved, but the number of members increases device complexity
Solution Approach 1:
The invention merges the cover member support function with the counterweight structure. The counterweight's top surface and rear surface are used directly as support surfaces for the cover member, eliminating the need for separate column members and beam members. This integration reduces the number of components while maintaining structural support.
Solution Approach 2:
The counterweight structure is given multiple functions: it serves both as a balancing weight and as a support structure for the cover member. The top surface and rear surface of the counterweight are utilized as precise positioning and support surfaces, making the counterweight a multi-functional component that reduces overall device complexity.
3Reliability
If the cover member is positioned using multiple column members, then structural support is provided, but installation accuracy and ease are reduced
Solution Approach 1:
The invention extracts the positioning function from the column members and assigns it to the counterweight's surfaces. The cover member is positioned by the top surface and rear surface of the counterweight, which provide natural, accurate reference surfaces. This extraction of the positioning function eliminates the need for complex alignment procedures involving multiple column members.
Solution Approach 2:
The counterweight's top surface and rear surface automatically serve as precise positioning references for the cover member. These surfaces inherently provide the necessary alignment and positioning without requiring additional adjustment mechanisms or complex installation procedures. The structure serves itself as the positioning reference.
Data Source
AI summary
The work vehicle includes a main body frame, a counterweight, a first beam member, and a first cover member. The counterweight is placed at a rear portion of the main body frame. The counterweight forms a concave portion that is recessed rearwardly from a front surface side of the counterweight and extends to a top surface of the counterweight. The first beam member extends across the concave portion and is attached to both side ends of the counterweight. The first cover member is provided on a top surface of a first frame portion including the first beam member and the concave portion.