Capacitor Mounting Construction Vibration Absorption
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Solution Overview
Problem
Conventional capacitor mounting constructions in motor vehicles face issues with durability due to repeated loads on lead wires and terminals, leading to potential abnormal noise and damage from vibrations.
Innovation Solution
A capacitor mounting construction featuring a housing with a wire accommodating space and a bracket that fixes and electrically connects wires to a conductive member, using an elastic urging member to press the capacitor against the housing's inner wall, preventing direct contact and vibration-induced stress on lead wires and terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the capacitor is fixed to the circuit board with flexible lead wires and an elastic member, then the vibration of the capacitor is absorbed, but the lead wires are subjected to repeated loads causing durability damage
Solution Approach 1:
The patent introduces a bracket as an intermediary component between the capacitor and the circuit board. The bracket has a capacitor accommodating space that holds the capacitor body, while the lead wires are routed through the bracket to a conductive member. This intermediary structure prevents direct vibration transmission to the lead wires, eliminating the repeated loading issue while still providing vibration absorption through the elastic member and flexible portions of the lead wires within the bracket.
2Object-affected harmful factors
If the electrical component is accommodated in the box with elastic tongue pieces, then the vibration is mitigated, but the terminals are subjected to repeated loads causing durability damage
Solution Approach 1:
The bracket serves as a mediator that separates the capacitor from direct contact with the circuit board. The capacitor is held in the capacitor accommodating space of the bracket, and the lead wires are guided through the bracket to connect with the conductive member. This arrangement prevents the capacitor and its terminals from directly experiencing vibration-induced loading, thereby protecting terminal durability while maintaining vibration mitigation capabilities.
3Object-affected harmful factors
If the lead wires are made flexible to absorb vibration, then the capacitor vibration is mitigated, but the lead wire durability is damaged due to repeated loads
Solution Approach 1:
The bracket acts as an intermediary structure that provides a dedicated path for the lead wires. The flexible portions of the lead wires are contained within the bracket's structure, allowing them to absorb vibrations without transmitting repeated loads to the connection points. The bracket's rigid structure supports the lead wires, preventing excessive movement and fatigue while maintaining the necessary flexibility for vibration absorption.
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 enhances the durability of lead wires and terminals by absorbing vibrations, preventing abnormal noise and ensuring consistent contact pressure without relying on wire elasticity, while simplifying the mounting process and eliminating the need for additional grounding components.
Implementation Method 1
an elastic member is interposed between the circuit board on which the capacitor is mounted and the capacitor
Implementation Method 2
when vibrations are transmitted from the body to the circuit board, the vibration of the capacitor is absorbed by displacements of the elastic member
Implementation Method 3
flexible portions in a spiral or other form provided between fixing portions where the lead wires of the capacitor are fixed to the circuit board and the capacitor
Implementation Method 4
the vibration of the capacitor is absorbed by displacements of the elastic member and the flexible portions of the lead wires
Implementation Method 5
a plurality of elastic tongue pieces are provided on an upper face of a junction box
Implementation Method 6
when vibrations are transmitted from the body to the junction box, the vibration of the electrical component is absorbed by displacements of the elastic tongue pieces
Data Source
AI summary
A capacitor mounting construction includes housing, a bracket and an urging member. The housing has a capacitor accommodating space configured to accommodate a capacitor and a wire accommodating space configured to accommodate a wire extended from the capacitor. The bracket is engaged with the housing, is configured to fix and electrically connect the wire to a conductive member in the wire accommodating space, and covers the capacitor accommodating space to define a capacitor accommodating chamber. The urging member is provided on an inner wall of the capacitor accommodating chamber, and is configured to urge the capacitor to contact another inner wall of the capacitor accommodating chamber.