Working Vehicle Fender Support Frame Stiffness
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Solution Overview
Problem
Working vehicles with rear wheel fenders face challenges in material and assembly due to their complex structure, requiring angular pipe members for support stiffness, which complicates attachment and increases costs.
Innovation Solution
A simplified fender support structure using a fender support frame with bracket members, front and rear lateral bridge members, and a rear connection member with an L-shaped cross section, allowing for easier attachment and removal of fenders, improved stiffness, and reduced resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If angular pipe members and brackets are protruded from transmission case to secure support stiffness, then the fenders can be firmly held, but the structure becomes complicated and assembly becomes difficult
Solution Approach 1:
The fender support structure is divided into separate modular components: the transmission case, fender brackets, and lateral bridge members are distinct parts that can be manufactured independently and assembled together. This segmentation simplifies manufacturing while maintaining the required support stiffness through proper structural design of each component.
2Strength
If angular pipe members and brackets are protruded from transmission case to secure support stiffness, then the fenders can be firmly held, but assembly and transportation become more difficult
Solution Approach 1:
The fender brackets and lateral bridge members are designed with pre-formed attachment structures that align with corresponding features on the transmission case. This preliminary design of attachment interfaces enables straightforward assembly without requiring complex field modifications or specialized assembly procedures.
3Ease of operation
If a separate fender support frame is used, then attachment and removal becomes easier, but additional structural components are required
Solution Approach 1:
The lateral bridge members serve multiple functions: they provide structural support for the fenders, act as attachment points for the fender brackets, and contribute to the overall rigidity of the vehicle body. This multi-functionality reduces the need for separate dedicated components while maintaining ease of attachment and removal.
Data Source
AI summary
Left and right rear fenders for wheels are supported to a body by a simple arrangement and the stiffness of the fenders can be achieved.A working vehicle assembly includes left and right wheels, an operator sheet, a transmission case having a shift transmission unit therein and rotatably supporting the left and right rear wheels, left and right fenders for the left and right rear wheels arranged in both sides of the operator seat, a fender support frame having left and right bracket members, a front lateral bridge member connected to the left and right bracket members at a front end thereof, and a rear lateral bridge member connected to the left and right bracket members at a rear end thereof. The left and right bracket members are formed along a front to rear direction of the left and right fenders and configured to attach the left and right fenders. The front lateral bridge member and the rear lateral bridge member are supported above the transmission case.