Suspended Inertial Unit Mounting to Prevent Stud Sliding
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Solution Overview
Problem
Inertial devices face performance degradation due to mechanical stresses and movements from impacts and vibrations, as existing fastening systems allow relative movement between the insert and the inertial device, leading to sliding and mechanical stresses.
Innovation Solution
The use of fastener studs with a body made of elastically deformable material, where at least one element is secured to the support frame and another to the inertial device, with a centering portion and housing providing a fit with clearance of no more than 50 micrometers to prevent sliding and limit mechanical stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insert is suspended by an elastically deformable body to damp movements and impacts, then the inertial device is protected from frame movements, but the insert can still slide relative to the inertial device under impacts and vibration, causing mechanical stresses
Solution Approach 1:
A centering portion is introduced as an intermediary element between the insert and the inertial device. This centering portion engages with a corresponding recess in the inertial device to prevent sliding movements while allowing the elastically deformable body to continue damping impacts and vibrations. The mediator resolves the contradiction by eliminating the harmful sliding effect while preserving the protective damping function.
2Stress or pressure
If the insert is allowed to move freely relative to the inertial device to absorb shocks, then impact damping is improved, but relative movement causes sliding and mechanical stresses that degrade performance
Solution Approach 1:
The solution applies local quality by differentiating the functional characteristics of different parts of the fastening system. The elastically deformable body provides local shock absorption capability, while the centering portion provides local constraint against sliding. This localized differentiation of functions allows the system to simultaneously achieve impact damping and movement prevention, resolving the contradiction between shock absorption and performance stability.
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
This solution effectively prevents sliding between the insert and the inertial device, reducing mechanical stresses and enhancing the performance and stability of inertial devices under mechanical loads.
Implementation Method 1
a body made of elastically deformable material
Implementation Method 2
The body of elastically deformable material can thus damp any transmission to the inertial device of movements and impacts
Data Source
AI summary
Equipment including an inertial detector device provided with fastener studs enabling the inertial device to be fastened to a support frame. At least one of the fastener studs has two elements, one of which elements is fastened to the support frame and has a bearing surface that is in contact with a bearing surface of the support frame. The other element is fastened to the inertial device and has a bearing surface that is in contact with a bearing surface of the inertial device, which two elements are suspended relative to each other by means of a body made of elastically deformable material. At least one of the elements is fastened by at least one screw. The corresponding bearing surfaces is provided respectively with a centering portion and with a housing for receiving said centering portion with a fit that allows clearance of no more than 50 μm.