Geared Motor Housing With Inclined Die-Cast Channel Layout
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Solution Overview
Problem
Conventional die casting methods for producing metallic parts result in inefficient use of space and material in geared motors, leading to larger designs and increased lubricating oil requirements due to orthogonal slider movements during demolding, which complicates the integration of compact gear units and torque support.
Innovation Solution
A geared motor with a housing part produced using a die casting method where sliders are moved at non-vanishing angles, allowing the ring gear to project into a channel, reducing the gear unit's size and oil requirements, and featuring an asymmetrical design with a hollow output shaft for improved accessibility and torque distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If sliders are moved in orthogonal directions during die casting demolding, then the housing part can be easily manufactured, but the ring gear cannot project into the channel, resulting in larger gear unit size and increased lubricating oil requirements
Solution Approach 1:
The patent applies asymmetry by designing the channel with an inclined drawing direction (5°-45° angle) rather than orthogonal alignment. This asymmetric channel configuration allows the ring gear to project into the channel space, reducing the gear unit's overall volume and lubricating oil requirements while maintaining manufacturability through controlled non-orthogonal slider movement.
2Volume of moving object
If the gear unit is designed to be compact, then space efficiency improves, but the housing wall must extend closer to toothed parts, requiring complex demolding angles
Solution Approach 1:
The patent employs parameter changes by optimizing the drawing direction angle within a specific range (5°-45°) relative to the input shaft axis. This parameter optimization achieves compact gear unit volume while maintaining feasible demolding complexity, balancing space efficiency with manufacturing practicality.
3Volume of moving object
If the channel is made wide to accommodate the ring gear, then the ring gear can project into the channel, but the inner diameter must be larger than the ring gear's outer diameter
Solution Approach 1:
The patent applies dimensionality change by utilizing the inclined drawing direction to create three-dimensional space efficiency. The channel's inclined orientation allows the ring gear to project into the channel volume more effectively, optimizing space utilization without requiring excessive channel inner diameter.
4Volume of stationary object
If screws are aligned parallel to the drawing direction, then wall thickness is minimized, but the screws are not guided orthogonally through the connection surface
Solution Approach 1:
The patent applies asymmetry by aligning screw holes with the inclined drawing direction (5°-45° angle) rather than orthogonal to the connection surface. This asymmetric alignment minimizes wall thickness requirements while accepting the trade-off of non-orthogonal screw guidance, optimizing the balance between structural efficiency and assembly complexity.
Data Source
AI summary
A geared motor, e.g., a gear unit or a bevel gear unit, which is able to be driven by an electric motor, includes a housing part, which is produced by a die casting method, during or after which sliders are moved, in particular pulled out, in respective drawing directions for the demolding, and an input shaft. The housing part includes a channel, demolded in a first drawing direction, in particular, using a first slider, the channel being adapted to extend through the wall of the housing and ending in the interior space region of the gear unit. The drawing direction has a non-vanishing angle in relation to the axis of rotation of the input shaft, its angle in particular amounting to between 5° and 45°, e.g., between 5° and 20°.