Tractor Fender Support Using ROPS Frame Legs
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Solution Overview
Problem
Conventional tractors require multiple transverse frames for stable support of fenders, leading to complex construction and increased component count, which complicates assembly, shipping, and potential damage during reverse driving.
Innovation Solution
A tractor design utilizing a ROPS frame with leg portions connected to the transmission case or rear axle cases, along with front frames and attaching frames that support fenders, eliminating the need for multiple transverse frames and enhancing structural rigidity while preventing fender contact with rearward objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transverse frames are provided to support the fenders, then the fender support stability is improved, but the device complexity and component count increase
Solution Approach 1:
The ROPS frame is designed to serve dual purposes: providing rollover protection for the driver and supporting the fenders. The right and left leg portions of the ROPS frame directly support the right and left fenders respectively, eliminating the need for separate transverse frames. This multi-functional design resolves the contradiction by maintaining fender support stability while reducing the number of components.
2Reliability
If multiple transverse frames are used for fender support, then the fender support stability is improved, but the ease of manufacture and assembly deteriorates
Solution Approach 1:
The ROPS frame structure is utilized for both safety protection and fender support functions. The right attaching frame connects the right fender to the right leg portion of the ROPS frame, while the left attaching frame connects the left fender to the left leg portion. This integration simplifies the overall structure and reduces assembly complexity by eliminating multiple separate transverse frames.
3Area of stationary object
If fenders extend rearward beyond the ROPS frame, then the fender coverage area is improved, but the harmful factors during reverse driving increase
Solution Approach 1:
The fender design proactively prevents potential damage by limiting the rearward extension of the lateral wall portions to not project beyond the rear face of the ROPS frame leg portions. This preliminary design constraint avoids the harmful effect of accidental contact with rearward objects during reverse driving, resolving the contradiction between coverage area and damage prevention.
Data Source
AI summary
A tractor includes a ROPS frame having right and left leg portions connected to either a transmission case or rear axle cases, a front frame connected to a portion of the transmission case forwardly of the ROPS frame and extending in the right/left direction, a right attaching frame connected to and between the right leg portion of the ROPS frame and a right side portion of the front frame and extending in the fore/aft direction, a left attaching frame connected to and between the left leg portion of the ROPS frame and a left side portion of the front frame and extending in the fore/aft direction, and right and left fenders. The right fender is attached to the right attaching frame and the left fender is attached to the left attaching frame.