Harmonic Reducer Oil Guiding Ring Lubrication
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Solution Overview
Problem
Existing harmonic reducers face issues with foreign matter impurities due to abrasion and require increased size and cost due to complex lubrication systems, which compromise their service life and efficiency.
Innovation Solution
A harmonic reducer with an oil guiding ring that integrates an oil guiding ring within the accommodating space of the flexible external gear, allowing lubricant oil to be efficiently distributed to the flexible bearing through an annular oil storage groove and oil inlet holes, preventing foreign impurities and maintaining the original design without increasing size or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a lubricating retainer is added to form a lubrication space, then the service life is prolonged and wear is reduced, but the lubricating retainer and accommodating portion rub against each other generating heat and wear, increasing foreign matter
Solution Approach 1:
The invention extracts the lubrication function from a separate lubricating retainer component and integrates it into the oil guiding ring. The oil guiding ring is disposed within the accommodating space and directs lubricant oil to the flexible bearing, eliminating the need for a separate lubricating retainer that would rub against the accommodating portion and generate foreign matter.
Solution Approach 2:
The oil guiding ring serves as an intermediary component that directs lubricant oil from the oil filling hole to the flexible bearing. It has an annular oil storage groove and oil inlet holes that guide the lubricant oil flow, providing effective lubrication without the rubbing contact that generates foreign matter in the prior art.
2Duration of action of stationary object
If a seal cover unit with annular oil groove and pressurizing unit is added for automatic lubrication, then the service life is improved, but the overall volume of the reducer increases and part cost greatly increases
Solution Approach 1:
The invention merges the lubrication storage and distribution functions into a single oil guiding ring component that is disposed within the existing accommodating space. The oil guiding ring integrates the oil storage groove and oil inlet holes into one compact structure, eliminating the need for separate seal cover units and pressurizing mechanisms, thereby maintaining the original reducer size and reducing part count.
Solution Approach 2:
The oil guiding ring provides self-service lubrication by utilizing the rotation of the wave generator to naturally circulate lubricant oil from the oil storage groove through the oil inlet holes to the flexible bearing. This eliminates the need for external pressurizing units or complex automatic lubrication systems, reducing device complexity while maintaining effective lubrication.
3Reliability
If a lubricating retainer is added to create a lubrication space, then bearing and gear meshing are sufficiently lubricated, but the original design is changed increasing overall volume and part cost
Solution Approach 1:
The oil guiding ring is nested within the existing accommodating space of the flexible external gear assembly. It is disposed between the first housing and the flexible bearing, utilizing the existing internal volume without requiring additional external space. This nested configuration provides effective lubrication while maintaining the original reducer dimensions.
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 oil guiding ring ensures effective lubrication, preventing foreign impurities and extending the service life of the harmonic reducer without altering its size or increasing costs, by directing lubricant oil to the flexible bearing, thus enhancing the reducer's operational efficiency and longevity.
Implementation Method 1
the lubricant oil in the annular oil storage groove is guided to the flexible bearing of the wave generator by the annular wall surface to lubricate the flexible bearing
Data Source
AI summary
A harmonic reducer with an oil guiding ring, wherein an oil guiding ring is disposed in an accommodating space of a flexible external gear, and the oil guiding ring is sleeved on a coupling member and located between a first housing and a flexible bearing. Therefore, after lubricant oil is injected through the oil filling hole of the first housing, the lubricant oil enters an annular oil storage groove through the oil inlet holes of the oil guiding ring. When the wave generator rotates, the lubricant oil in the annular oil storage groove is guided to the flexible bearing of the wave generator by the annular wall surface to lubricate the flexible bearing. Therefore, on the basis of effective lubrication, the harmonic reducer can avoid the foreign body impurity caused by insufficient lubrication, and at the same time, does not have to change the original design.