Planetary Gearbox Planet Carrier Axial Space Reduction
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Solution Overview
Problem
Existing planetary gearboxes require a significant amount of axial installation space, which is a disadvantage in terms of space efficiency, especially in applications where compact designs are necessary.
Innovation Solution
The outer bearing ring is fixedly connected to the planet carrier, and the inner bearing ring is connected to the stationary housing, allowing for a more compact and cost-effective design by eliminating the need for an axially outward collar and using roller bearings for improved durability and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the planet carrier is mounted using a collar with an inner bearing ring forced onto it, then the mounting structure is achieved, but the axial installation space is increased and the structure becomes more complex and expensive
Solution Approach 1:
The invention merges the planet carrier mounting structure with the bearing assembly by integrating the outer bearing ring directly onto the planet carrier body, eliminating the separate collar component. This consolidation reduces the number of parts, simplifies the mounting structure, and decreases axial installation space while maintaining the required functional support for the planet carrier.
Solution Approach 2:
The invention extracts and removes the unnecessary collar component from the mounting structure. By eliminating this redundant element and directly mounting the bearing assembly to the planet carrier, the design achieves a more compact configuration with reduced axial space requirements and lower manufacturing complexity.
2Reliability
If more components are used to ensure stability and force distribution, then the durability is improved, but the assembly costs and device complexity increase
Solution Approach 1:
The invention combines multiple functions into the bearing assembly itself, which simultaneously provides force distribution, stability support, and mounting functionality. This integration maintains the required durability and reliability while reducing the total number of separate components and simplifying the overall structure.
Solution Approach 2:
The bearing assembly is designed to perform multiple functions: supporting the planet carrier, distributing forces, ensuring stability, and providing precise positioning. This multi-functional design eliminates the need for separate components for each function, reducing complexity while maintaining or enhancing reliability.
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
This configuration results in a lighter, more durable, and space-saving planetary gearbox that reduces assembly costs and enhances the gearbox's loading capacity while maintaining efficient force transmission and stability.
Implementation Method 1
a bearing having an inner bearing ring and an outer bearing ring, such as a roller bearing, rotatably mounts the planet carrier in a stationary housing
Data Source
AI summary
A planetary gearbox (1, 101) having a differential gear (2, 102), having a planet carrier (3, 103) to which planet wheels (5, 6, 105) that are in meshed engagement with at least one sun gear (9, 10, 11, 106, 107) are rotatably connected, wherein the planet carrier (3, 103) can be connected to a drive wheel (15), wherein in addition a bearing (19, 108) having an inner bearing ring (29) and an outer bearing ring (28, 117) rotatably mounts the planet carrier (3, 103) in a stationary housing determining the axial and/or radial position of said carrier, wherein the outer bearing ring (28, 117) is rotatably fixedly connected to the planet carrier (3, 103) and the inner bearing ring (29) is connected to the stationary housing.