Magnetic Strain Wave Gear Rotor Assembly With Magnet Passage Holes
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Solution Overview
Problem
Conventional magnetic strain wave gear devices face challenges in efficiently assembling the high-speed rotor due to magnetic attraction forces, leading to low assembly efficiency and decreased energy conversion efficiency when widening the gap to facilitate insertion.
Innovation Solution
The design includes a low-speed rotor end plate with rotor magnet passage holes allowing rotor magnets to be inserted after the high-speed rotor core is positioned, eliminating perpendicular magnetic attraction forces and enabling accurate alignment, while narrowing the gap between stator and rotor magnets to maintain energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gap between the high-speed rotor and the stator is widened to facilitate insertion, then the assembly efficiency is improved, but the energy conversion efficiency decreases
Solution Approach 1:
The rotor magnets are inserted into the rotor magnet insertion holes before the high-speed rotor is inserted into the stator. This preliminary action allows the rotor to be pre-assembled with magnets in a controlled environment, eliminating the difficulty of inserting a magnetized rotor into the stator and enabling accurate positioning without requiring an excessively large gap.
Solution Approach 2:
The assembly process is divided into distinct stages: first inserting the high-speed rotor core into the stator, then separately inserting the rotor magnets through the rotor magnet insertion holes. This segmentation allows each component to be positioned independently and accurately, ensuring proper alignment while maintaining a minimal gap for energy efficiency.
2Ease of manufacture
If the high-speed rotor with magnetized rotor magnets is inserted into the stator, then the device is assembled, but magnetic attraction forces prevent accurate insertion
Solution Approach 1:
The rotor magnets are inserted into the rotor magnet insertion holes before the high-speed rotor is inserted into the stator. This preliminary action allows the rotor to be pre-assembled with magnets in a controlled environment, eliminating the difficulty of inserting a magnetized rotor into the stator and enabling accurate positioning without requiring an excessively large gap.
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 improves assembly efficiency and suppresses the decrease in energy conversion efficiency by allowing precise rotor insertion and reducing the need for additional rotor magnets.
Implementation Method 1
magnetic attraction forces are exerted between the permanent magnets of the stator and the rotor magnets of the high-speed rotor
Data Source
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AI summary
Provided is a magnetic strain wave gear device that makes it possible to achieve both improvement of the efficiency of assembly work and suppression of decrease in energy conversion efficiency. A magnetic strain wave gear device (1) includes: a stator (3) having a stator core (31), a stator winding (32), and a stator magnet (33); a first rotor (4); and a second rotor (5). The second rotor includes a second rotor core (51) provided with a plurality of rotor magnet insertion holes and a plurality of rotor magnets (52) inserted into the plurality of respective rotor magnet insertion holes. The first rotor includes a cylindrical first rotor core and a first rotor end plate (42). The first rotor end plate has a rotor magnet passage hole (42b) through which the rotor magnets can be inserted into the rotor insertion holes from outside in a direction of a rotation shaft.