Damper Mount Screw Fastening for Engine Vibration Damping
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Solution Overview
Problem
Existing saddle-type vehicle engine mounting systems face challenges in achieving high joint strength and efficient vibration damping between the engine and vehicle body frame, often requiring complex assembly processes and tools, which can be time-consuming and prone to backlash due to clearance fits.
Innovation Solution
A damper mount system featuring a cylindrical mount housing with a male screw and female screw arrangement, an elastic body, and a tool attaching portion, which allows for easy attachment and high joint strength, while the outer flange and stopper portions ensure precise positioning and easy replacement of the damper mount without detaching the engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If press-fitting is used to attach the outer tube to the holding tube, then joint strength is improved, but assembly time increases and requires additional jigs
Solution Approach 1:
The patent introduces a male screw on the outer tube as an intermediary fastening element that threads into a female screw on the holding tube. This screw mechanism serves as a mediator between the two components, providing strong joint fixation without requiring press-fitting operations or additional assembly jigs, thereby reducing assembly time while maintaining high joint strength.
2Loss of time
If clearance fit is used between the outer tube and holding tube, then assembly time is reduced, but backlash is caused due to the space between components
Solution Approach 1:
The male screw acts as an intermediary fastening element that eliminates the backlash problem inherent in clearance fits. By threading the male screw into the female screw, the components are firmly connected without any play or movement, ensuring reliability while maintaining simple assembly procedures.
3Strength
If a dedicated jig is used for press-fitting the outer tube, then joint strength is improved, but device complexity increases
Solution Approach 1:
The screw fastening system eliminates the need for complex press-fitting jigs by using a simple threaded connection. The male and female screws provide a straightforward assembly method that achieves strong joints without requiring additional specialized tools or equipment, thereby reducing device complexity.
4Ease of operation
If the mount housing is made small for easier handling, then ease of operation is improved, but the load of press-fitting work increases
Solution Approach 1:
The screw fastening system eliminates press-fitting operations entirely, replacing them with a simple threading process. This allows the mount housing to remain small and easy to handle without incurring the disadvantages of high press-fitting loads, as the screw connection can be made with minimal force and standard tools.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces vibrations between the engine and vehicle body frame, improves joint strength, simplifies attachment and maintenance, and reduces the load of press-fitting work by using a small-sized mount housing for easier handling and assembly.
Implementation Method 1
a cylindrical elastic body disposed inside the mount housing
Implementation Method 2
The mount housing and the inner cylinder are joined via an elastic body that is elastically deformable. Accordingly, the engine is elastically supported by the vehicle body frame. Therefore, vibrations to be transmitted between the engine and the vehicle body frame are damped
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A damper mount (27) includes a cylindrical mount housing (28) joined to a vehicle body frame (3), a cylindrical elastic body (34) disposed inside the mount housing (28), and an inner cylinder (35) that is disposed inside the elastic body (34) and joined to the engine (15). The mount housing (28) includes a male screw (41) screwed to a female screw (40) provided on the vehicle body frame (3), and a tool attaching portion (32) to which a tool is attached when screwing the male screw (41) to the female screw (40).