Planetary Gear Carrier Structure for Low-Labor Assembly
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Solution Overview
Problem
Conventional planetary gear devices require significant labor for assembly due to the need to secure the carrier cover to the carrier main unit using multiple bolts after housing the sun gear and planetary gears, increasing the complexity and time required for assembly.
Innovation Solution
A carrier design featuring a gear housing space formed between gear supporting portions connected by beams, which reduces assembly labor by allowing for monolithic molding and smooth sliding of components, eliminating the need for multiple bolts and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carrier cover is secured to the carrier main unit using multiple bolts after housing the sun gear and planetary gears, then the structural integrity and reliability of the planetary gear device is improved, but the assembly labor and time required increases significantly
Solution Approach 1:
The patent merges the carrier main unit and carrier cover into a single integrated carrier structure. The gear housing space is formed by creating an inner cavity within the carrier main unit itself, eliminating the need for a separate carrier cover. This integration removes the bolts that were previously needed to secure the carrier cover, thereby reducing assembly labor while maintaining structural integrity through the unified design.
2Ease of manufacture
If the carrier is assembled from multiple components (carrier main unit and carrier cover), then the manufacturing and assembly flexibility is improved, but the device complexity and assembly time increase
Solution Approach 1:
The patent combines multiple carrier components into a single monolithic carrier structure. The gear housing space is formed as an integrated cavity within the carrier main unit, eliminating the need for separate carrier cover components. This reduces device complexity by removing interfaces between components and simplifying the assembly process, while manufacturing flexibility is maintained through the ability to form the integrated structure using appropriate molding or machining techniques.
Data Source
AI summary
To reduce assembly man-hours of a planetary gear device by devising a structure of a carrier, disclosed is a carrier of a planetary gear device 1 is formed with a gear housing space for housing a sun gear and a planetary gear. The gear housing space is formed between a pair of gear support parts rotatably supporting the planetary gear by a gear support shaft. The pair of gear support parts are integrally connected by a plurality of beams. The beam has a virtual plane orthogonal to a rotation axis of the sun gear as an x-y plane, and a radial direction of a direction extending radially from the rotation axis along the x-y plane is formed along a radial direction at a radially outer position of the sun gear. The planetary gear is located between the beams.