Shock-Absorbing Strain Wave Speed Reducer for Impact Relief
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Solution Overview
Problem
Strain wave gearing speed reducers in industrial robots suffer from loss of synchronism and gear damage due to external impacts, which existing technologies fail to adequately absorb or relieve.
Innovation Solution
A speed reducer design incorporating an elastic member with a spherical shape disposed between the speed reducing unit and the housing, allowing the speed reducing unit to move in the direction and circumferential direction of the rotary shaft, thereby absorbing or relieving impacts through a shock absorbing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a strain wave gearing speed reducer is used to achieve high reduction ratio, light weight, and small size, then the reduction ratio and compactness are improved, but the system becomes vulnerable to external impacts causing loss of synchronism and gear damage
Solution Approach 1:
A shock absorbing unit is introduced as an intermediary component between the speed reducing unit and the housing. This unit includes an elastic member (such as a rubber spherical portion) that mediates the transmission of impact forces, absorbing shocks before they reach the precision gear components and preventing loss of synchronism while maintaining the compact strain wave gearing structure
2Stability of the object's composition
If the speed reducing unit is fixed rigidly to the housing, then structural stability is improved, but external impacts cause loss of synchronism and gear damage
Solution Approach 1:
The connection between the speed reducing unit and housing is changed from a static rigid fixation to a dynamic shock-absorbing connection. The elastic member allows controlled movement and deformation under impact loads, dynamically adapting to external forces while maintaining normal operational stability during non-impact conditions
3Reliability
If a shock absorbing unit with elastic member is added to protect against impacts, then reliability under impact is improved, but device complexity increases
Solution Approach 1:
The shock absorbing unit utilizes an elastic member with a spherical portion (such as rubber) that functions as a flexible shock-absorbing element. This flexible component provides effective impact protection through its elastic deformation characteristics while maintaining a relatively simple structural form that integrates easily with the existing speed reducer design
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 design effectively prevents loss of synchronism and gear damage, ensuring safe and reliable operation by absorbing external impacts, reducing the risk of collision between the speed reducing unit and the housing.
Implementation Method 1
the elastic member is formed of rubber
Implementation Method 2
The elastic member has a spherical shape
Data Source
AI summary
One object is to provide a speed reducer that can absorb or relieve an impact acting thereon. A speed reducer of the present invention includes: a speed reducing unit a housing that houses the speed reducing unit and a shock absorbing means that allows the speed reducing unit to move with respect to the housing in a direction of a rotary shaft of the speed reducing unit.