Vehicle Compressor Fastening Alignment for Bolt Fatigue
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Solution Overview
Problem
Conventional compressor fastening structures in vehicles lead to rotational moment and fatigue stress due to misalignment of the compressor's center of gravity and point of support, which can result in bolt failure under vibrations and impacts, posing a risk of decoupling and accidents.
Innovation Solution
A compressor fastening structure where the center of gravity and point of support are aligned in the longitudinal direction of the fastener, with additional features like a buffer system using elastic materials to absorb vibrations and impacts, and multiple points of support to distribute stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the compressor is mounted horizontally to the vehicle body, then the mounting structure is simple and easy to install, but the center of gravity and point of support are misaligned causing rotational moment and fatigue stress on bolts
Solution Approach 1:
The patent changes the mounting direction from horizontal to vertical, reorienting the fastening structure along the vehicle's width direction rather than length direction. This dimensional change allows the center of gravity to coincide with the point of support, eliminating rotational moment while maintaining structural simplicity
Solution Approach 2:
The patent employs asymmetric positioning of the center of gravity relative to the vehicle body, placing it closer to the vehicle width direction. This asymmetric arrangement enables alignment of the center of gravity with the vertical fastening axis, resolving the contradiction between simple mounting and fatigue resistance
2Adaptability or versatility
If the distances D1 and D2 between the compressor's point of support and center of gravity are increased, then the mounting flexibility is improved, but the rotational moment and fatigue stress on bolts increase
Solution Approach 1:
By switching from horizontal to vertical mounting, the patent changes the geometric relationship between support points and center of gravity. The vertical orientation ensures that even with flexible positioning, the gravitational force acts along the fastening axis rather than creating rotational moment
Solution Approach 2:
The patent positions the center of gravity to coincide with the point of support, creating a counterbalancing effect where the weight distribution eliminates rotational moment. This counterweight principle ensures that mounting flexibility does not compromise bolt fatigue resistance
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 configuration effectively reduces rotational moment and fatigue stress, enhancing the durability and safety of the compressor by evenly distributing the self-weight and absorbing vibrations and impacts, thereby preventing bolt failure and ensuring secure mounting.
Implementation Method 1
vibration or impact occurs in the vertical direction of the vehicle, and this vibration or impact is transmitted to the compressor 1 through the compressor mounting part 2
Implementation Method 2
in the operating environment such as speed bumps or unpaved roads, vibration or impact occurs in the vertical direction of the vehicle
Data Source
AI summary
Disclosed herein is a compressor that includes a casing, a fastening part disposed at a portion corresponding to a support bracket provided in a compressor mounting part of a vehicle on the casing, and a fastener connecting the support bracket to the fastening part, wherein a compressor's center of gravity and a compressor's point of support supported by the fastener are positioned in a longitudinal direction of the fastener. The present disclosure has an effect of relieving rotational moment and fatigue stress occurring in the compressor when the compressor is mounted to the vehicle.