Integrated Wave Gear Motor Unit for High Torque in Tight Space
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Solution Overview
Problem
Conventional electromagnetic drives with high rotating speeds often require gearboxes to increase torque, but these gearboxes occupy excessive installation space, making them unsuitable for certain applications.
Innovation Solution
A compact and space-saving geared motor unit is designed by integrating the motor and gearbox, with a wave gearbox configuration that includes a flex spline, circular spline, and wave generator, allowing for efficient torque transmission while minimizing space usage, and utilizing thermally conductive materials and cable routing holes for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a gearbox is used to increase torque from high-speed electromagnetic drives, then torque is improved, but installation space increases
Solution Approach 1:
The patent combines the motor and gearbox into a single integrated unit where the motor is positioned concentrically within the gearbox structure. The motor housing serves dual purposes as both the motor enclosure and part of the gearbox housing, eliminating the need for separate motor and gearbox housings. This merging of functions and structures achieves compact torque transmission while minimizing installation space.
2Area of stationary object
If the motor is integrated in the gearbox, then installation space is reduced, but thermal management becomes more challenging
Solution Approach 1:
The patent introduces a thermal paste as an intermediary substance between the motor housing and gearbox housing to facilitate heat transfer. The thermal paste fills the interface gap and provides a thermal conduction path, allowing heat generated by the motor to be efficiently transferred to the gearbox housing which acts as a heat sink. This resolves the thermal management challenge created by the integrated design.
3Ease of manufacture
If conventional separate motor and gearbox designs are used, then ease of manufacture is maintained, but device complexity increases
Solution Approach 1:
The patent merges the motor and gearbox into a single integrated assembly where the motor housing and gearbox housing form a unified structure. This integration reduces the total number of components and assembly steps, thereby decreasing device complexity while maintaining manufacturing feasibility through standardized production processes for the integrated unit.
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 integrated design enables efficient torque transmission in a compact form factor, utilizing otherwise unused space and allowing the geared motor unit to be applied in a variety of applications without the need for additional space, while also effectively managing heat dissipation and cable installation.
Implementation Method 1
the stator housing (13) comprises a material which is thermally conductive
Implementation Method 2
The elliptic wave generator as the driven part by way of the ball bearing deforms the flex spline which in the opposite regions of the major elliptic axis engages with the internally toothed circular spline
Data Source
AI summary
Various embodiments include a geared motor unit comprising: a motor with a stator and a rotor; and a gearbox including a first element, a second element, and a third element. The stator is connected to the third element and the rotor is connected to the first element. At least one element of the gearbox is connected to a mass.