Resin Component for Motor Cable Vibration Absorption
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Solution Overview
Problem
Existing motor cable devices face issues with vibration transmission causing abnormal noise and potential damage to fix members, and the structure of vehicles limits the placement of fix members, which can lead to damage and reliability issues with the inverter-side connecting member.
Innovation Solution
A motor cable device with a resin component that includes a swinging-motion absorbing portion to absorb vibrations and shocks, allowing the cable body to swing and reducing the force impact on the inverter-side connecting member, while also providing a recess for forming a non-planar cable shape and protecting the inverter-side connecting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fix members are used to fix the cable body to the vehicle body, then the cable body is secured and vibration/shock is regulated, but the fix members may suffer abnormal noise and damage due to transmitted vibration, and their placement is limited by vehicle structure
Solution Approach 1:
The resin component serves as an intermediary between the cable body and the inverter. It provides fixing functionality while its viscoelastic properties allow it to absorb vibration and shock, preventing these harmful forces from being transmitted to the inverter-side connecting member. This mediator approach resolves the contradiction by decoupling the fixing function from the vibration transmission path.
Solution Approach 2:
The invention changes the material parameters of the fixing component by using a resin material with specific viscoelastic properties instead of rigid fix members. The resin's ability to change its mechanical response based on frequency and amplitude allows it to both secure the cable and absorb vibration, transforming the fixing mechanism from rigid to flexible-damped.
2Object-generated harmful factors
If the cable body is allowed to swing to absorb vibration, then vibration absorption improves, but a force induced by swinging motion may damage the inverter-side connecting member
Solution Approach 1:
The resin component's viscoelastic parameters enable it to provide damping forces that increase with vibration amplitude. During normal operation, the resin allows controlled swinging motion for vibration absorption, but during large swings that could damage the connecting member, the resin's nonlinear damping characteristics generate restoring forces that limit the motion amplitude, thus protecting the connecting member.
Solution Approach 2:
The resin component provides beforehand cushioning by being positioned between the cable body and the inverter. Its viscoelastic properties create a cushioning effect that absorbs vibration energy before it can reach the inverter-side connecting member, preventing damage before it occurs.
3Reliability
If fix members are used to secure the cable body, then vibration transmission is regulated, but the structure cannot be adapted to different vehicle configurations
Solution Approach 1:
The resin component performs multiple functions: it fixes the cable body to the inverter, absorbs vibration and shock, and allows for flexible installation in various vehicle configurations. This multi-functionality eliminates the need for separate fix members and enables adaptation to different vehicle structures while maintaining vibration regulation.
Solution Approach 2:
The resin component introduces dynamic characteristics to the fixing system. Unlike rigid fix members, the resin can dynamically respond to vibration frequencies and amplitudes, allowing the system to adapt to different operating conditions and vehicle configurations while maintaining effective vibration regulation.
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 resin component effectively absorbs swinging motions, preventing damage and maintaining the reliability of the inverter-side connecting member, while allowing for flexible cable shaping and assembly, and protecting the inverter-side connecting member from vibration-induced stress.
Implementation Method 1
a resin component having a fixed end which is directly or indirectly fixed to the inverter and which supports the inverter-side connecting member, wherein the cable body is arranged so as vibration of the motor or shock from an external environment is transmitted to the cable body to generate a swinging motion at the cable body
Data Source
AI summary
The motor cable device which can prevent damage on an inverter-side connecting member of the motor cable device and lowering in a connecting reliability of the inverter-side connecting member is provided. Also, a resin component used in the above-described motor cable device is provided. The motor cable device electrically connects a motor and an inverter and includes an inverter-side protector and a motor-side protector. The inverter-side protector includes a fixed end which is directly or indirectly fixed to the inverter and which supports the inverter-side connecting member. A swinging motion absorbing portion is formed continuously to the fixed end, the swinging motion absorbing portion being arranged to support a cable body at the inverter-side connecting member and absorb the swinging motion generated at the cable body of the motor cable device, is further included.