Saddle-riding Vehicle Swing Arm Recess for Linear Member Protection
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Solution Overview
Problem
In saddle-riding type vehicles, linear members such as brake pipes and sensor harnesses are exposed and prone to damage from stepping stones, compromising both appearance and functionality.
Innovation Solution
A linear member holding structure featuring a swing arm with a recess that accommodates the brake pipe and sensor harness vertically, covered by a slider, and regulated by a holding member, which includes a projection to prevent upward and inward movement, enhancing protection and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If linear members are disposed along the swing arm in conventional structures, then the structure is simple and easy to manufacture, but the linear members are exposed and vulnerable to damage from stepping stones, compromising appearance and functionality
Solution Approach 1:
The recess in the swing arm creates a nested structure where the brake pipe and sensor harness are accommodated within the swing arm body itself. This nesting approach protects the linear members from external damage while maintaining a compact and integrated design without adding separate protective housings
Solution Approach 2:
The linear members are arranged in the upper-lower direction (vertical dimension) within the recess rather than being exposed on the outer surface. This dimensional repositioning moves the vulnerable components to a protected internal space while maintaining accessibility for wiring and maintenance
2Shape
If linear members are exposed on the swing arm, then wiring and installation are simple, but the appearance design properties are poor and the members are vulnerable to damage
Solution Approach 1:
The recess creates a localized protected zone within the swing arm specifically for accommodating linear members. This local structural modification provides protection and improved appearance in the specific area where linear members are housed, while the rest of the swing arm maintains its original simple structure for ease of manufacture
Solution Approach 2:
The brake pipe and sensor harness are nested within the recess, concealing them from external view and protecting them from damage. This nesting improves appearance by hiding the linear members while the recess geometry is designed to facilitate wiring access and installation
3Volume of moving object
If the swing arm has a vertical section longer in upper-lower direction, then there is space to accommodate linear members vertically, but the swing arm structure becomes more complex and stress distribution changes
Solution Approach 1:
The swing arm is segmented into distinct functional zones: the vertical section with the recess for linear member accommodation, and other sections for structural support and wheel mounting. This segmentation allows the vertical section to be optimized for housing linear members while other sections maintain their structural functions, managing complexity through functional separation
Data Source
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AI summary
A linear member holding structure of a saddle-riding type vehicle includes a swing arm (10) that includes a front portion and a rear portion which rotatably supports a rear wheel via a driving shaft, and a linear member (30) that extends along the swing arm (10) in a front-rear direction of the vehicle and includes at least a rear wheel brake pipe (30a) and a sensor harness (30b). The swing arm (10) has at least a part having a vertical section formed longer in an upper-lower direction than in a vehicle width direction, wherein the part of the swing arm (10) is formed with a recess (14) on an upper part thereof. The recess (14) includes a recess bottom surface (14b) and a recess inside surface (14w) standing from the recess bottom surface (14b). The recess inside surface (14w) has a width longer in the upper-lower direction than a width in the vehicle width direction of the recess bottom surface (14b). The brake pipe (30a) and the sensor harness (30b) are arranged in the upper-lower direction to be accommodated in the recess (14).