Vehicle Roll Rod Rear Insulator Assembly Gap Control
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Solution Overview
Problem
Conventional roll rods for vehicles experience gaps between rear insulators and brackets during movement, leading to shock and reduced insulation against vibration noise, and compromised durability due to pre-compression and deformation issues.
Innovation Solution
A roll rod design featuring a rear insulator assembly with a separation preventing rib and groove, inclined side portions, and a void structure that restricts motion displacement using a double stopping method to minimize deformation and maintain a constant interval, enhancing insulation and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the rear insulator is inserted into the case bracket with pre-compression to prevent gaps, then the gap between rear insulator and case bracket is minimized, but the spring characteristic of the rear insulator increases and insulation rate becomes very low
Solution Approach 1:
The rear insulator is divided into multiple segments along its length, with at least one segment being movable relative to the others. This segmentation allows the insulator to maintain contact with the case bracket (minimizing gaps) while the movable segments absorb deformation through relative movement rather than elastic compression, thereby preserving the insulation rate.
Solution Approach 2:
The rear insulator transitions from a static, pre-compressed structure to a dynamic structure where segments can move relative to each other. This dynamic capability allows the insulator to adapt to load variations without relying on elastic spring characteristics, maintaining both gap minimization and insulation performance.
2Object-affected harmful factors
If the rear insulator is pre-compressed to prevent shock, then the interval between rear insulator and case bracket is reduced, but the rear insulator sticks out of the case bracket under load and durability decreases
Solution Approach 1:
By segmenting the rear insulator, each segment can independently deform and move relative to others under load. This prevents the entire insulator from being forced outward, eliminating the sticking-out phenomenon that leads to durability issues while still maintaining shock absorption capability.
Solution Approach 2:
The patent changes the deformation parameter from elastic compression of a monolithic structure to relative displacement of segmented structures. This parameter change allows the insulator to absorb shock through segment movement rather than overall compression, preventing the insulator from sticking out and improving durability.
3Reliability
If the rear insulator is not pre-compressed and inserted loosely, then the insulation rate is maintained, but gaps occur between the rear insulator and case bracket causing shock
Solution Approach 1:
The segmented structure allows the rear insulator to maintain contact with the case bracket through gravitational or elastic contact of individual segments rather than requiring pre-compression of the entire insulator. This eliminates gaps and shock while preserving insulation rate.
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 design effectively limits deformation and motion displacement, preventing shock and improving vibration noise insulation while reducing pre-compression and enhancing durability through gradual, flexible deformation.
Implementation Method 1
a first rear insulator 3a, which is inserted into and installed on a front of the case bracket 6, of the rear insulator 3 is compressed
Data Source
AI summary
A roll rod for a vehicle includes: a bracket including a front insulator, which is connected to a power train, installed on one end portion; and a rear insulator assembly installed on the other end portion of the bracket. The rear insulator assembly comprises a rear insulator disposed on an inner side of a rear mounting portion formed on the other end portion of the bracket, and a core penetrating the rear insulator and fastened to a vehicle body.