Geared Motor Modular System with Universal Bearing Shield Interface
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Solution Overview
Problem
Existing geared motor systems require adapters for various connections, leading to increased complexity and manufacturing tolerances, and struggle to provide a wide range of gear ratios and low-backlash capabilities.
Innovation Solution
A modular system for geared motors with a drive-end motor bearing shield interface allowing direct connection of pinions as input gearing parts, enabling connection of both lateral-force-free and non-lateral-force-free gear units, and incorporating adapters with centering and expansion compensation devices for precise alignment and thermal adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adapters are used for connecting gear units to motors, then connection versatility is improved, but device complexity and manufacturing tolerances increase
Solution Approach 1:
The motor bearing shield interface is designed with a universal centering device that can accommodate both lateral-force-free gear units (like planetary gear units) and gear units with lateral forces (like helical gear units). This single interface design eliminates the need for different adapter types, reducing device complexity while maintaining connection versatility.
Solution Approach 2:
The patent introduces an adapter as an intermediary component that includes expansion compensation devices. This adapter mediates between the motor bearing shield and the gear unit, allowing for thermal expansion compensation and precise alignment while maintaining a standardized interface design.
2Manufacturing precision
If adapters with centering devices are used, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The centering device is merged directly into the motor bearing shield interface rather than being a separate component. This integration achieves precise alignment functionality while reducing the overall number of parts and simplifying the device structure.
Solution Approach 2:
The motor bearing shield interface combines multiple functions: it provides structural support, enables precise centering through the integrated centering device, and accommodates both types of gear units. This multi-functionality reduces device complexity while maintaining alignment precision.
3Adaptability or versatility
If expansion compensation devices are added to adapters, then thermal adjustment capability is improved, but device complexity increases
Solution Approach 1:
The expansion compensation devices are merged into the adapter structure rather than being separate components. This integration provides thermal adjustment capability while minimizing the increase in device complexity through efficient space utilization.
Solution Approach 2:
The adapter is designed with universal multi-functionality, incorporating both centering capabilities and expansion compensation devices in a single component. This allows the same adapter design to handle both lateral-force-free and non-lateral-force-free gear units with thermal compensation.
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 modular system reduces manufacturing tolerances, increases the range of gear ratios, and achieves low-backlash capabilities, making it suitable for servo technology applications with adaptable unit volume, torsional rigidity, and mass moment of inertia.
Implementation Method 1
having a first device for the compensation of axial expansions, e.g., thermally caused expansions
Implementation Method 2
having a second device for the compensation of axial expansions, e.g., thermally caused expansions
Data Source
AI summary
A spare part set for a gearmotor series includes transmissions actuated by electric motors. The series has at least one dimension which may be characterized by at least one physical, mechanical and/or geometrical value, e.g., by nominal power, axis height or torque. Each electric motor includes at least one crankcase, a rotor provided with a rotor axis and a side-shield for a motor bearing arranged within a given size. The crankcase includes an interface with the side-shield for a motor bearing, which is selected such that at least two different embodiments thereof are connectable to the said crankcase.