Elastic Planetary Carrier with Tapered Sleeve for Backlash Reduction
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Solution Overview
Problem
Traditional planetary transmission devices suffer from increasing backlashes due to gear surface abrasion and processing/assembly errors, leading to low transmission precision and uniform load performance.
Innovation Solution
A displacement planetary carrier system comprising an elastic planetary carrier with tapered surfaces and a rigid tapered sleeve, along with an axial adjustment mechanism, allows the planetary gears to expand and press against inner gear rings, reducing backlashes and applying prepressure to improve precision and load performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional rigid planetary carrier is used, then structural simplicity is maintained, but backlashes increase due to gear surface abrasion and processing errors
Solution Approach 1:
The planetary carrier is designed with elastic deformation capability through tapered surfaces and adjustable structure, allowing it to dynamically adapt to gear wear and manufacturing errors by expanding radially to maintain optimal meshing clearance, transforming from a static rigid structure to a dynamic adjustable one
Solution Approach 2:
The invention changes the physical state of the planetary carrier from rigid to elastically deformable by introducing tapered surfaces and adjustment mechanisms, enabling continuous parameter adjustment of the carrier's radial dimension to compensate for backlash accumulation over time
2Device complexity
If traditional fixed planetary carrier is used, then device complexity is low, but service life is reduced due to increasing backlashes and gear surface abrasion
Solution Approach 1:
The adjustable planetary carrier provides continuous adaptation to gear wear through elastic deformation and radial expansion, maintaining optimal meshing conditions throughout the device's operational life, thereby significantly extending service life compared to fixed rigid carriers
Solution Approach 2:
The displacement mechanism allows the planetary carrier to automatically adjust its radial position in response to gear wear and loading conditions, performing self-maintenance of optimal meshing clearance without external intervention, thus prolonging service life
3Manufacturing precision
If elastic planetary carrier with displacement mechanism is used, then transmission precision is improved by reducing backlashes, but device complexity increases
Solution Approach 1:
The elastic deformation capability is locally concentrated in the tapered surface regions of the planetary carrier, allowing precise local adjustment at the gear meshing points while maintaining overall structural simplicity and minimizing the impact on device complexity
4Ease of manufacture
If traditional planetary carrier without adjustment capability is used, then ease of manufacture is maintained, but uniform load performance deteriorates due to backlashes
Solution Approach 1:
The adjustable planetary carrier dynamically adapts to load variations and gear wear by modifying its radial dimension, maintaining consistent load distribution across planetary gears and preventing the deterioration of uniform load performance that occurs with traditional fixed carriers
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 system significantly prolongs the service life of the transmission device by continuously adjusting to maintain optimal meshing between planetary gears and inner gear rings, reducing vibration and improving transmission precision.
Implementation Method 1
the elastic planetary carrier includes first spaces for containing planetary gears... staggered notches are processed in the side wall... so that the elastic planetary carrier elastically deforms
Implementation Method 2
the rigid tapered sleeve is sleeved within the elastic planetary carrier... tapered surfaces that match with the tapered surface of the inner surface of the side wall... so that the outer surface, processed with the tapered surfaces, of the rigid tapered sleeve is in close fit with the inner surface, processed with the tapered surface, of the side wall
Data Source
AI summary
A displacement planetary carrier system, which consists of an elastic planetary carrier (1), a rigid tapered sleeve (2) and a rigid tapered sleeve axial adjustment mechanism (3); the elastic planetary carrier (1) is a planetary carrier in which an inner surface of a side wall portion is processed into a tapered surface, and staggered notches (103) are processed on the side wall, so that the elastic planetary carrier (1) elastically deforms; the rigid tapered sleeve (2) is sleeved within the elastic planetary carrier (1), part of the outer side wall is processed with a tapered surface that matches with the tapered surface of the inner surface of the side wall of the elastic planetary carrier (1); the rigid tapered sleeve axial adjustment mechanism (3) is axially mounted on an adjusting bolt/nut or elastic element at an end portion of the elastic planetary carrier (1) and/or the rigid tapered sleeve (2).