Magnetic Drive Transmission with Integrated Speed Reduction
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Solution Overview
Problem
Existing drive transmission devices face challenges in efficiently transmitting rotational forces while reducing speed and maintaining quietness and durability, particularly in applications like refrigeration cycle devices, where contactless magnetic coupling and speed reduction are required.
Innovation Solution
A drive transmission device that integrates a magnetic coupler and a speed changer, utilizing a drive-side rotatable body with magnetic poles and magnetic conducting portions arranged in a rotational direction, allowing for contactless magnetic coupling and speed reduction between the drive-side and driven-side rotatable bodies, with the magnetic conducting portions integrated in a partition wall member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic coupler is used for contactless drive transmission through a partition wall member, then quietness and durability are improved, but transmission efficiency and speed reduction capability are insufficient
Solution Approach 1:
The patent combines a magnetic coupler and a speed changer into a single integrated drive transmission device. The magnetic coupler transmits rotational force contactlessly through the partition wall member, while the speed changer (with drive-side and driven-side rotatable bodies having different numbers of magnetic poles) simultaneously provides speed reduction. This merging resolves the contradiction by achieving both high reliability through contactless magnetic coupling and high transmission efficiency through integrated speed reduction, eliminating the need for separate transmission components.
Solution Approach 2:
The drive transmission device performs multiple functions within a single system: it provides contactless magnetic coupling for reliable transmission through the partition wall, implements speed reduction through the speed changer mechanism, and transmits rotational force from the electric motor to the rotary valve mechanism. This multi-functionality resolves the contradiction by consolidating what would otherwise require separate components, thereby improving both reliability and transmission efficiency.
2Object-affected harmful factors
If a magnetic coupler is used for contactless drive transmission through a partition wall member, then quietness is improved, but speed reduction capability is insufficient
Solution Approach 1:
The patent merges the magnetic coupler and speed changer into one integrated device where the magnetic coupler ensures quiet contactless operation through the partition wall, while the incorporated speed changer (with drive-side rotatable body having a first number of magnetic poles and driven-side rotatable body having a second number of magnetic poles) simultaneously provides the required speed reduction capability.
Solution Approach 2:
The single drive transmission device universally performs both quiet contactless magnetic coupling and speed reduction functions, eliminating the need for separate components and thereby achieving both quietness and adequate speed reduction capability for controlling the rotary valve mechanism.
3Adaptability or versatility
If separate components are used for magnetic coupling and speed reduction, then functional flexibility is improved, but device complexity increases
Solution Approach 1:
The patent combines the magnetic coupler and speed changer into a single integrated drive transmission device with a unified structure. The drive-side rotatable body and driven-side rotatable body are positioned on opposite sides of the partition wall member, with magnetic poles arranged to provide both magnetic coupling and speed reduction. This merging reduces device complexity while maintaining functional flexibility for controlling the rotary valve mechanism.
Solution Approach 2:
The integrated drive transmission device provides universal functionality by combining magnetic coupling and speed reduction in one system. This multi-functionality reduces the overall number of components and simplifies the device structure, thereby reducing complexity while maintaining the adaptability needed for efficient refrigeration cycle control.
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 device achieves efficient transmission of rotational forces with reduced speed, maintaining high quietness and durability by using common components for magnetic coupling and speed reduction, ensuring effective contactless operation and improved transmission efficiency.
Implementation Method 1
a drive-side rotatable body and a driven-side rotatable body, which are respectively placed on two opposite sides of the partition wall member, are magnetically coupled
Implementation Method 2
The plurality of magnetic conducting portions are magnetizable by the plurality of magnetic poles of the drive-side rotatable body
Data Source
AI summary
A drive transmission device includes a drive-side rotatable body, a plurality of magnetic conducting portions and a driven-side rotatable body. The drive-side rotatable body includes a plurality of magnetic poles arranged in a rotational direction. The magnetic conducting portions are magnetizable by the magnetic poles of the drive-side rotatable body. The driven-side rotatable body has a plurality of magnetic poles configured to be rotated in response to rotation of the magnetic poles of the drive-side rotatable body through the magnetic conducting portions. The drive transmission device is configured to be operated as a magnetic speed changer that changes a speed of rotation between the drive-side rotatable body and the driven-side rotatable body by differently setting the number of the magnetic poles of the drive-side rotatable body, the number of the magnetic conducting portions and the number of the magnetic poles of the driven-side rotatable body from each other.