Upper-Side Muffler Mounting Bracket for Vibration Resistance
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Solution Overview
Problem
Conventional muffler mounting structures on vehicles are prone to loosening due to vibration during travel, and the mounting process is complicated by the need to access bolts from the side, which can interfere with other vehicle components.
Innovation Solution
A muffler mounting structure that includes a muffler mounting portion with a mounting hole and a mounted bracket on the muffler with a fixing member insertion hole, allowing for easy upper-side mounting and fastening, and featuring a damper mechanism to absorb vibrations and prevent loosening, with stopper surfaces and a rod system for enhanced stability and reduced part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bolts are inserted from the side to fix the muffler, then the mounting operation can be performed with conventional tools, but the rear fender and rear wheels interfere with the mounting process and complicate the operation
Solution Approach 1:
The patent inverts the conventional mounting approach by changing the bolt insertion direction from side-insertion to upper-side insertion. The mounted bracket is designed with a through-hole that allows the bolt to be inserted from the upper side of the muffler, reversing the traditional mounting direction and avoiding interference from rear fenders and wheels.
2Ease of manufacture
If the muffler is fixed with bolts inserted from the side, then the mounting can be performed, but the muffler oscillates in the front and rear direction during travel and the bolts are easily loosened
Solution Approach 1:
The patent changes the bolt insertion direction from side to upper side, which fundamentally alters the loading characteristics on the bolt. This inversion prevents the muffler from oscillating in the front and rear direction during travel, as the upper-side insertion creates a more stable fixation that resists vibration-induced loosening.
Solution Approach 2:
The patent transitions the mounting approach from a horizontal (side) insertion to a vertical (upper side) insertion. This dimensional change in the bolt insertion direction fundamentally alters the mechanical behavior of the joint, improving resistance to oscillation and loosening during vehicle travel.
3Device complexity
If conventional side-insertion mounting is used, then the structure is simple, but the mounting operation is complicated by vehicle components interference
Solution Approach 1:
The patent maintains structural simplicity while improving operability by inverting the mounting direction. The mounted bracket retains a simple through-hole design, but the bolt is inserted from the upper side instead of the side, which eliminates interference from rear fenders and wheels during the mounting operation.
Data Source
AI summary
A muffler mounting structure of a vehicle, particularly a straddle-type four-wheeled vehicle. The muffler mounting structure is provided with a muffler, at least one muffler mounting portion provided in a body frame and having a mounting hole, and at least one mounted bracket provided in an upper part of the muffler and disposed on an upper surface of the muffler mounting portion. The mounted bracket having a fixing member insertion hole passing in the up and down direction, and at least one fixing member inserted into the fixing member insertion hole from the upper side and fixed to the mounting hole.