Engine Mount Insulator Recessed Grooves Reduce Press-Fit Force
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Solution Overview
Problem
Existing engine mount structures require high press-fitting forces and multiple components for assembly, leading to increased assembly time and potential damage to insulators due to uneven deformation, which affects vibration insulation performance.
Innovation Solution
A one-piece engine mount structure featuring a bracket with mounting holes, an elastic insulator with recessed and catching portions along its circumference, and a fixing pipe that reduces the required press-fitting force by absorbing deformation through recessed shapes, preventing damage and improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the insulator is divided into two portions and assembled with a fixing pipe, then the insulator can be manufactured separately, but the number of components increases and assembly time increases
Solution Approach 1:
The insulator is manufactured as a single integrated piece rather than being divided into two separate portions (3a and 3b). This merging of components reduces the total number of parts, simplifies the assembly process, and eliminates the need for separate assembly steps while maintaining the same functional benefits of vibration insulation and structural support.
2Reliability
If the fixing pipe is press-fitted into the insulator, then the insulator is secured, but excessive press-fitting force damages the insulator due to tolerance variations
Solution Approach 1:
The insulator is designed with pre-formed recessed portions (grooves) at strategic locations. These recessed portions act as cushioning zones that absorb and distribute the press-fitting force during assembly, preventing excessive localized stress that would damage the insulator. This beforehand cushioning design ensures reliable fixation while protecting the insulator's structural integrity from damage due to tolerance variations.
3Reliability
If high press-fitting force is applied during assembly, then the insulator is securely fixed, but the insulator deforms unevenly and damage occurs
Solution Approach 1:
The insulator features locally modified regions in the form of recessed portions positioned at specific locations along its length. These recessed portions create zones of controlled compliance that locally absorb assembly forces, allowing the majority of the insulator body to maintain its precise dimensional tolerances and uniform structure. This local quality modification enables secure fixation without causing uneven deformation or damage to the overall insulator geometry.
4Device complexity
If the insulator is manufactured as one piece, then assembly is simplified, but the press-fitting force required increases
Solution Approach 1:
The recessed portions built into the one-piece insulator structure serve as built-in cushioning zones that reduce the overall press-fitting force required during assembly. By distributing the assembly force across multiple recessed portions rather than requiring uniform compression of the entire insulator, the design enables simplified one-piece manufacturing while reducing the magnitude of press-fitting force needed compared to a solid one-piece design without recesses.
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 solution reduces the press-fitting force needed for assembly, enhances durability, and improves vibration insulation by dispersing elastic deformation, resulting in improved dynamic characteristics and noise, vibration, and harshness (NVH) performance.
Implementation Method 1
a structure for mounting an engine mount which may be easily assembled (may reduce a magnitude of press-fitting force required for assembly)
Implementation Method 2
the insulator 3 includes a material having elasticity and serves to additionally attenuate vibration which is transmitted to the vehicle body through the bolts 7
Data Source
AI summary
A structure for mounting an engine mount, may include bracket which is coupled to the engine mount, and may have at least one mounting hole; an insulator which may have a pipe shape having a center hole, includes a material having elasticity, and is fitted into the at least one mounting hole; and a fixing pipe which is fitted into the center hole, and mounted in the at least one mounting hole together with the insulator, in which a recessed portion having a partially cut out shape or a recessed shape is formed along a circumference of the insulator at a first side of the insulator.