Adapter Shaft and Bearing Seat Layout for Compact Geared Motors
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Solution Overview
Problem
Conventional geared motors are not compact due to the design limitations of their adapters, which hinder efficient torque transmission and stability.
Innovation Solution
The adapter includes an adapter shaft with dogs and a bearing seat that is interrupted in the circumferential direction, featuring a damping part between the dogs and a cutout to decouple regions, allowing for stable torque transmission and compact configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bearing seat is made uninterrupted in the circumferential direction, then the bearing stability is improved, but the adapter length in the axial direction increases
Solution Approach 1:
The bearing seat is divided into two distinct regions: a first region that is uninterrupted in the circumferential direction to provide bearing stability, and a second region that is interrupted in the circumferential direction to reduce adapter length. This segmentation allows each region to fulfill its specific function optimally.
Solution Approach 2:
Different regions of the bearing seat are given different structural qualities: the first region has continuous circumferential support for stability, while the second region has interrupted support to enable compact design. This local differentiation resolves the contradiction between stability and compactness.
2Force
If the dogs are made rigid to transmit high torque, then the torque transmission capability is improved, but the ability to accommodate thermal expansion decreases
Solution Approach 1:
The dogs are designed with elastic deflectability, allowing them to transition between rigid torque transmission and flexible thermal accommodation. The dogs can deflect elastically under thermal expansion while maintaining rigid torque transmission during normal operation.
Solution Approach 2:
The mechanical properties of the dogs are optimized to allow elastic deflection under thermal stress while maintaining sufficient rigidity for torque transmission. This parameter optimization enables the dogs to adapt to different operational conditions.
3Volume of moving object
If the adapter is made compact, then the overall motor size is reduced, but the bearing seat must be interrupted which may reduce bearing stability
Solution Approach 1:
The bearing seat is segmented into uninterrupted and interrupted regions, with the uninterrupted first region providing sufficient bearing stability while the interrupted second region enables compact adapter design. The segmentation allows the bearing to remain stable despite the compact overall configuration.
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 solution enables a compact geared motor design with stable torque transmission and damping of fluctuations, while maintaining sufficient stability and flexibility for thermal changes.
Implementation Method 1
a damping part is arranged between the dogs of the clutch part and the dogs of the adapter shaft... torque fluctuations can be damped
Implementation Method 2
the dogs are deflected elastically, e.g., when torque shocks are to be transmitted
Data Source
AI summary
An adapter, e.g., for a geared motor, includes an adapter shaft, a clutch part, and a bearing, e.g., a rolling bearing. The adapter part has dogs, e.g., dogs protruding in the axial direction, and the inner ring of the bearing is fitted onto a bearing seat, e.g., a finely machined bearing seat, provided on the adapter shaft. The bearing seat covers, in the axial direction, a first region in which the bearing seat is uninterrupted in the circumferential direction, and a second region in which the bearing seat is interrupted in the circumferential direction, e.g., at multiple points.