Engine Mount Bracket Engagement Inspection for Vibration Dampers
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Solution Overview
Problem
Existing vibration damping devices for automotive engine mounts face challenges in accurately confirming engagement failure between engaging pieces and detent engaging faces, particularly due to hidden and dark engagement areas, making it difficult to detect defects like cracks on non-visible surfaces.
Innovation Solution
The vibration damping device incorporates inspection flat surfaces on the engaging pieces and the bracket, which are parallel to each other and visible through aperture windows, allowing for accurate measurement of their relative positions to confirm proper engagement and detect any failures, such as damage or deformation, using non-destructive inspection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detent structure with engaging pieces is provided inside the mounting space of the bracket to prevent dislodgement, then the reliability of the connection is improved, but the ease of inspection deteriorates because the engaging face is hidden by the claw-shaped engaging part
Solution Approach 1:
The patent introduces an intermediary flat surface on the engaging piece that serves as a mediator between the hidden engagement interface and the external inspection environment. This flat surface allows light to reflect and enables visual or optical inspection methods to detect engagement status without directly exposing the engagement interface, thus resolving the contradiction between maintaining reliable engagement and enabling easy inspection
Solution Approach 2:
The patent utilizes optical properties (analogous to color changes principle) by creating a flat surface that reflects light differently when engaged versus disengaged. The inspection flat surface allows light to pass through or reflect in detectable patterns, enabling non-contact optical inspection methods to determine engagement status without physical contact with the hidden engagement surfaces
2Ease of operation
If a through hole is provided in the forward wall to visually confirm engagement, then the ease of operation is improved, but the measurement precision deteriorates because the engaged portion remains dark and narrow and is difficult to visually confirm
Solution Approach 1:
The flat surface acts as an intermediary that transforms the hidden engagement status into a visible optical signal. Instead of directly observing the dark and narrow engaged portion through the through hole, the inspection system observes the light reflection or transmission pattern from the flat surface, which accurately indicates engagement status with high precision
Solution Approach 2:
The patent replaces direct visual observation of the mechanical engagement interface with an optical inspection method. By using light reflection or transmission through the flat surface, the system substitutes mechanical visual confirmation with optical detection, achieving higher measurement precision while maintaining ease of operation
3Measurement precision
If inspection flat surfaces are provided on engaging pieces to enable accurate measurement, then the measurement precision is improved, but the device complexity increases due to additional structural elements
Solution Approach 1:
The flat surface on the engaging piece serves multiple functions: it maintains the structural integrity of the engaging piece, provides a surface for light reflection or transmission for inspection purposes, and ensures proper engagement with the detent engaging face. This multi-functionality reduces the need for separate inspection components, thereby limiting the increase in device complexity while achieving high measurement precision
Data Source
AI summary
A vibration damping device including a vibration-damping device main unit inserted into a mounting space of a bracket from a lateral side and securely supported by the bracket. The bracket includes engaging pieces on respective opposed inside faces of the mounting space, and engaging action of the engaging pieces with respect to respective detent engaging faces formed on a fixture member of the vibration-damping device main unit prevents the vibration-damping device main unit from becoming dislodged from the mounting space of the bracket. Opposed walls of the mounting space are each penetrated by an aperture window, and inspection flat surfaces are separately provided to an outside surface of each engaging piece visible from an outside through the aperture window and a corresponding external side surface of the bracket that is off the aperture window. The inspection flat surfaces are parallel to each other.