Carburetor Mounting Structure With Notched Bolt Holes
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Solution Overview
Problem
Conventional carburetor mounting structures require a large space outward of the stud bolts to accommodate the carburetor, making it impossible to mount if sufficient space is not available.
Innovation Solution
A carburetor mounting structure featuring notched first bolt holes in the first mounting flange to engage the stud bolt from the side, allowing the carburetor to be positioned and temporarily fixed without needing a large space outward of the stud bolts, combined with tap bolts for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carburetor is mounted using conventional stud bolts with nuts, then the carburetor can be temporarily fixed and subsequently secured, but a large space outward of the outer ends of the stud bolts is required
Solution Approach 1:
The mounting structure is segmented into two distinct functions: stud bolts provide temporary positioning and alignment, while tap bolts provide final secure fixation. This segmentation allows the carburetor to be mounted in limited space by separating the positioning function from the securing function, eliminating the need for large clearance space around the stud bolts.
Solution Approach 2:
Tap bolts serve as an intermediary element that bridges the gap between the carburetor mounting flange and the engine block. The tap bolts are inserted through the mounting flange after the carburetor is temporarily positioned by the stud bolts, and then screwed into the engine block to provide secure fixation without requiring additional clearance space.
2Ease of operation
If the carburetor is moved outward of the outer ends of the stud bolts for mounting, then the carburetor can be fitted to the stud bolts, but mounting is impossible when sufficient space does not exist
Solution Approach 1:
The mounting operation is segmented into two phases: first, the carburetor is temporarily positioned by fitting the mounting holes to the stud bolts; second, the tap bolts are inserted and screwed into the engine block to secure the carburetor. This segmentation eliminates the need to move the carburetor outward of the stud bolts, enabling mounting in limited space while maintaining ease of operation.
Solution Approach 2:
The stud bolts are preliminarily positioned in the engine block before the carburetor is mounted. This preliminary action provides reference points for aligning the carburetor mounting flange, allowing the carburetor to be accurately positioned and subsequently secured by the tap bolts without requiring large clearance space.
3Productivity
If notched first bolt holes are used to engage the stud bolt from the side, then the carburetor can be quickly positioned in limited space, but additional components are required
Solution Approach 1:
The mounting structure uses two types of bolts with distinct functions: stud bolts for temporary positioning and alignment, and tap bolts for final secure fixation. This segmentation enables quick positioning of the carburetor in limited space through the notched bolt holes engaging the stud bolts, while the additional tap bolts provide the necessary securing function, justifying the increased component count.
Solution Approach 2:
The stud bolts serve multiple functions: they provide temporary fixation, enable alignment of the carburetor mounting flange, and serve as reference points for inserting the tap bolts. This multi-functionality justifies the use of additional components, as the stud bolts perform several critical roles in the mounting process, improving productivity without proportionally increasing complexity.
Data Source
AI summary
In a carburetor mounting structure, a stud bolt is implanted in a carburetor mounting portion, a screw hole is provided in the carburetor mounting portion, first and second mounting flanges include first bolt holes through which the stud bolt passes, and second bolt holes into which a tap bolt is screwed, and the first bolt hole of the first mounting flange is formed into a notched shape so as to allow the stud bolt to be inserted into the first bolt hole from an outside of the first mounting flange. Thus, it is possible to provide a carburetor mounting structure wherein mounting of a carburetor by a stud bolt is possible even if only a small space exists outward of an outer end of the stud bolt.