Drive Unit Reinforcing Member for Vibration Suppression
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Solution Overview
Problem
In drive units for electric vehicles, the vibration of the drive source can cause unwanted vibration in the control device and expose auxiliary machines to potential damage during assembly or maintenance, leading to an increase in the number of components required for vibration suppression and protection.
Innovation Solution
A drive unit design where the drive source and control device are connected by a reinforcing member that surrounds at least part of the auxiliary machine, serving both to suppress vibration and protect the auxiliary machine, thereby reducing the overall number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a component for suppressing vibration and a component for protecting the auxiliary machine are added, then the vibration suppression and protection functions are improved, but the number of components increases
Solution Approach 1:
The patent combines the vibration suppression function and the protection function into a single reinforcing member. This member simultaneously suppresses vibration of the control device and protects the auxiliary machine from tools or other parts, thereby improving reliability while avoiding an increase in the number of components.
Solution Approach 2:
The reinforcing member is designed to perform multiple functions: it acts as both a vibration suppression component and a protection component. By making this single component universal, the patent resolves the contradiction between needing multiple functions and maintaining a simple component structure.
2Ease of operation
If the control device is mounted on the upper surface of the case, then the control function is improved, but the control device is exposed to vibration from the drive source
Solution Approach 1:
The reinforcing member acts as an intermediary between the drive source and the control device. It is connected to both the drive source and the control device, serving as a mediator that suppresses the transmission of vibration from the drive source to the control device, thereby protecting the control function while maintaining the mounting arrangement.
3Volume of moving object
If the auxiliary machine is placed on the upper surface of the drive source, then the space utilization is improved, but the auxiliary machine is exposed to potential damage during assembly or maintenance
Solution Approach 1:
The reinforcing member combines the vibration suppression function and the protection function into a single component. This member simultaneously suppresses vibration of the control device and protects the auxiliary machine from tools or other parts, thereby improving reliability while avoiding an increase in the number of components.
Solution Approach 2:
The reinforcing member is designed to perform multiple functions: it acts as both a vibration suppression component and a protection component. By making this single component universal, the patent resolves the contradiction between needing multiple functions and maintaining a simple component structure.
Data Source
AI summary
A drive unit includes a drive source, a case which is connected to the drive source and accommodates an electric motor, a control device which is mounted on an upper surface of the case and controls the electric motor, and an auxiliary machine placed on an upper surface of the drive source. The drive source and the control device are connected by a reinforcing member, and the reinforcing member is arranged so as to surround at least a part of the auxiliary machine in a top view. According to the drive unit, the vibration of the control device can be suppressed, and the auxiliary machine is protected while the number of parts is reduced.