Partition-Supported Motor Layout for Cooling and Vibration Isolation
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Solution Overview
Problem
Existing hand-held electrically powered devices face challenges in reliably supporting electric motors, which can lead to inadequate cooling and increased vibration transmission to the housing.
Innovation Solution
The device incorporates a housing with a wall member that supports the electric motor, featuring a through opening allowing the motor to extend between compartments, and includes a fan for cooling and resilient elements to reduce vibration transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric motor is directly mounted in the housing, then the structure is simple, but the motor support reliability is insufficient and vibrations are transmitted to the housing
Solution Approach 1:
The housing is divided into multiple compartments by a partition wall, with the motor extending through a through-opening in the partition wall. This segmentation allows the motor to be supported at multiple locations (both compartments) while maintaining a relatively simple overall structure. The motor support reliability is improved by distributing the support points across the partition wall and housing walls, without requiring a completely complex reconfiguration of the housing.
Solution Approach 2:
The partition wall acts as an intermediary structure that the motor extends through. The motor is supported by the partition wall at the through-opening and by other housing walls, creating multiple support points. This intermediary structure improves motor support reliability without requiring direct mounting of the motor to the main housing body, thereby reducing vibration transmission while maintaining structural simplicity.
2Temperature
If the motor is positioned to extend through the partition wall, then cooling efficiency is improved, but the housing structure becomes more complex
Solution Approach 1:
The housing is segmented into at least two compartments by a partition wall with a through-opening. This segmentation allows cooling air to flow through the motor from one compartment to the other, significantly improving cooling efficiency. The through-opening in the partition wall creates a direct airflow path through the motor, enabling effective heat dissipation without requiring complex cooling systems.
Solution Approach 2:
The partition wall serves multiple functions: it divides the housing into compartments for organizational purposes, provides structural support for the motor through the through-opening, and facilitates airflow for cooling the motor. By making the partition wall multi-functional, the design improves motor cooling efficiency without adding separate complex cooling structures, thereby avoiding excessive structural complexity.
3Object-generated harmful factors
If resilient elements are added to reduce vibration transmission, then vibration isolation is improved, but the device complexity increases
Solution Approach 1:
Resilient elements are incorporated into the motor mounting structure to provide vibration isolation before vibrations can be transmitted to the housing. These cushioning elements are pre-installed in the mounting paths, ensuring that vibrations from the motor are attenuated before reaching the housing structure. This beforehand cushioning approach effectively reduces vibration transmission while maintaining a relatively simple mounting structure.
Solution Approach 2:
Resilient elements act as intermediary components between the motor and the housing structure. These elements are inserted into the mounting path, serving as a mediator that absorbs and attenuates vibrations. By placing this intermediary cushioning layer in the transmission path, vibration isolation is significantly improved without requiring a completely complex isolation system, as the resilient elements can be integrated into existing mounting points.
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 ensures reliable support and cooling of the electric motor, while minimizing vibration transmission to the housing, thereby enhancing the device's operational efficiency and user experience.
Implementation Method 1
The fan is connected to the motor shaft and arranged to produce an airflow for cooling the electric motor
Data Source
AI summary
Herein a hand-held electrically powered device (2) is disclosed. The hand-held device comprises a housing (4)), an electric motor (14), and a fan (18). The hand-held device (2) comprises a wall member (20) arranged inside the housing (4) and forming at least part of a wall (22) which delimits a first compartment (24) from a second compartment (26) within the housing (4). The wall member (20) forms an individual element. The wall member (20) is coupled to first and second housing elements. The wall member (20) comprises a through opening (42). The electric motor (14) extends from the first compartment (24) to the second compartment (26) via the through opening (42). The electric motor (14) is supported by the wall member (20).