Straddle-Type Vehicle Brake Pipe Routing for Fork Expansion
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Solution Overview
Problem
Straddle-type vehicles, such as off-road motorcycles, face challenges in routing brake pipes to accommodate the long stroke of front forks, requiring a configuration that allows the brake pipes to follow fork expansion while minimizing interference and maintaining compactness.
Innovation Solution
The brake pipe is routed to extend from the ABS modulator, passing through a space between the head pipe and the second front fork below the top bridge, then supported by a supporter positioned ahead of the top bridge, curving upward to connect to the front wheel braking unit, ensuring sufficient length to follow fork expansion without protruding or interfering with other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the brake pipe is routed to follow the expansion of the front forks, then the brake pipe can accommodate the long stroke of the front forks, but the brake pipe may protrude or interfere with other components
Solution Approach 1:
The brake pipe is routed through the vertical dimension by passing through a supporter positioned above the top bridge, rather than horizontally along the fork. This vertical routing allows the pipe to accommodate fork expansion in the horizontal dimension while avoiding interference with other components.
Solution Approach 2:
A supporter is introduced as an intermediary component to hold and guide the brake pipe. The supporter is positioned above the top bridge and provides a structured pathway for the brake pipe, ensuring it follows the fork expansion while maintaining proper clearance from other vehicle components.
2Volume of moving object
If the brake pipe passes through the space between the head pipe and the second front fork, then the brake pipe can be compactly routed, but the space available for routing is limited
Solution Approach 1:
The supporter serves as a mediator that creates a defined routing path through the limited space between the head pipe and the second front fork. By providing this intermediary structure, the brake pipe can be compactly routed through the constrained space while maintaining ease of installation through a predetermined pathway.
Data Source
AI summary
A straddle-type vehicle includes a steering stem, a top bridge, a first front fork, a second front fork, a front wheel braking unit, an ABS modulator, a supporter, and a brake pipe. The front wheel braking unit is provided at the first front fork. The ABS modulator is disposed rearward with respect to the top bridge. The supporter is provided at the second front fork forward with respect to the top bridge. The brake pipe extends from the ABS modulator to the front wheel braking unit through the supporter. The brake pipe between the ABS modulator and the supporter passes through a space between the head pipe and the second front fork below the top bridge. The brake pipe between the supporter and the front wheel braking unit passes through a position higher than the top bridge to be connected to the front wheel braking unit.