Saddled Vehicle Seat Frame With Internal Bolt Fastening
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Solution Overview
Problem
Conventional seat frames for saddled vehicles lack sufficient coupling rigidity and aesthetic appeal, especially when the rear end is separable and exposed, which limits design flexibility and aesthetic enhancement.
Innovation Solution
A seat frame design with a separable rear end that uses a bolt-based fastening system engaging from the inside, featuring a hollow front part and solid rear part with pipe members and cross plates for increased rigidity and aesthetic appeal, allowing easy replacement and design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rear end of the seat frame is made separable to allow easy replacement and design flexibility, then adaptability is improved, but coupling rigidity deteriorates
Solution Approach 1:
The seat frame is divided into a front part (A) and a rear part (B) that can be detachably attached. The rear part includes an engagement part (39) with a solid structure that couples to the front part, allowing the seat frame to be segmented for design flexibility while maintaining connection strength through the engagement part design.
Solution Approach 2:
The coupling structure combines different structural forms: the front part has a hollow structure while the engagement part has a solid structure. This composite approach allows the hollow front part for weight reduction and aesthetic appeal, while the solid engagement part provides the necessary coupling rigidity when assembled.
2Ease of operation
If the fastening member is exposed on the outside for easy assembly, then ease of operation is improved, but aesthetic aspect deteriorates
Solution Approach 1:
The fastening member (bolt 43) is extracted from the external view and positioned to engage from the inside of the vehicle width direction. The bolt passes through a through hole (36c) in the lateral wall (36b) of the cross plate, allowing assembly operation while being hidden from the outside, thus improving aesthetic appearance.
Solution Approach 2:
Instead of the conventional external fastening approach, the fastening member is inverted to engage from the inside. The bolt is inserted from the lateral wall and screws into the engagement part, reversing the typical fastening direction to achieve both ease of assembly and aesthetic concealment.
3Weight of moving object
If the front part has a hollow structure for weight reduction and aesthetics, then weight is reduced, but structural strength deteriorates
Solution Approach 1:
The front part (A) has a hollow structure for weight reduction and aesthetic appeal, while the engagement part (39) has a solid structure specifically at the coupling location. This local quality differentiation allows the majority of the front part to be lightweight and aesthetic, while the critical coupling region maintains high strength through solid construction.
Data Source
AI summary
Provided is a seat frame for a saddled vehicle capable of increasing the coupling rigidity at the separable rear end and having aesthetic aspect. A seat frame of a vehicle body frame includes a front part fixed to the vehicle body frame and a rear part that can be disconnected from the front part, the front part and the rear part being separated at a rear part of the vehicle body. The front part and the rear part are fixed with a fastening member that engages from the inside of the vehicle width direction. The front part has a hollow rear end, and the rear part includes a solid engagement part at the front end. The fastening member as a bolt penetrates through the lateral wall at the rear end to be screwed with the engagement part inserted into the rear end. The rear part includes the engagement part and a pipe member to be connected to a rear part of the engagement part.