Integrated Motor-Reducer Shaft Layout for Shorter Axial Length
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Solution Overview
Problem
Conventional coaxial motor and reducer combinations face challenges in reducing overall volume while maintaining high reduction ratios, leading to inefficient space utilization and increased structural components.
Innovation Solution
An integrated connection shaft with different axial diameters is used to combine the motor and speed reducer, forming parallel shafts and accommodating spaces for the motor and encoder, allowing for space optimization and reduced axial length, while maintaining high reduction ratios through an elliptical cam design and independent oil storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor and reducer are coaxially arranged, then the reduction ratio can be maintained, but the axial length becomes huge and space utilization is poor
Solution Approach 1:
The patent transitions from a conventional coaxial arrangement to a parallel shaft arrangement, changing the spatial dimension of the mechanical transmission system. The motor shaft and reducer input shaft are arranged parallel to each other and connected through a coupling mechanism, which dramatically reduces the axial length while maintaining the required reduction ratio.
Solution Approach 2:
The coupling mechanism serves multiple functions simultaneously: it connects the motor shaft to the reducer input shaft, transmits torque, maintains the parallel shaft arrangement, and enables compact space utilization. This multi-functional design eliminates the need for separate connection components that would increase axial length.
2Ease of manufacture
If the motor and reducer are combined with separate components, then the connection is simple, but the structural complexity increases and space utilization decreases
Solution Approach 1:
The patent merges the motor and reducer into a compact integrated unit where the motor shaft and reducer input shaft are positioned parallel and connected through a integrated coupling mechanism. This merging reduces the number of separate components and connection interfaces, simplifying the overall structure while maintaining ease of assembly.
Solution Approach 2:
The design nests the coupling mechanism within the compact space between the motor and reducer, utilizing the available radial and axial space efficiently. The coupling components are arranged concentrically and parallel to each other, creating a nested configuration that minimizes external dimensions while maintaining internal functionality.
Data Source
AI summary
A speed-reducer-and-motor all-on-one machine is disclosed and includes a connection shaft, a motor and a speed reducer. The connection shaft includes a first section, a second section and an accommodation space. The first section and the second section are arranged in an axial direction. The accommodation space is in communication between a front end and a rear end of the connection shaft. An elliptical cam is formed on an outer surface of the second section of the connection shaft. An outer diameter of the first section is greater than a major axis length of the elliptical cam. The motor is received within the accommodation space and connected to an inner surface of the first section. The speed reducer is connected to the outer surface of the second section.