Planetary Gear Carrier Integrating Outer Peripheral Gear
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Solution Overview
Problem
Existing carrier configurations for planetary gear mechanisms require multiple parts and bonding steps, increasing manufacturing complexity and cost due to separate outer peripheral gears and holding members.
Innovation Solution
A carrier design where the outer peripheral gear is integrally formed with one of the holding members, reducing the number of parts and bonding steps by using a disc-like member with a coupling portion bonded to the radially inner side of the outer peripheral gear, allowing for common processing and simplified welding procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outer peripheral gear and holding members are made as separate members, then the carrier can be manufactured with modular components, but the number of parts and bonding steps increases
Solution Approach 1:
The outer peripheral gear is integrated into the holding member as a single monolithic structure, eliminating the need for separate bonding steps between these components. This merging reduces the total number of parts and assembly operations while maintaining the functional advantages of modular design in other aspects of the carrier.
2Ease of manufacture
If the outer peripheral gear is made as a separate member, then the holding member can be manufactured independently, but the manufacturing cost and processing steps increase
Solution Approach 1:
The holding member and outer peripheral gear are combined into a single monolithic component manufactured in one process, eliminating the need for independent manufacturing and subsequent bonding operations. This integration reduces manufacturing cost and increases productivity by reducing the number of processing steps.
3Device complexity
If multiple bonding steps are used to assemble the carrier, then the carrier can be manufactured with separate components, but the manufacturing complexity and time increase
Solution Approach 1:
The carrier components are designed as a monolithic structure where the outer peripheral gear is an integral part of the holding member, eliminating multiple bonding steps. This reduces manufacturing time and process complexity while maintaining assembly flexibility through the overall carrier design rather than component-level assembly.
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 reduces manufacturing costs and enhances strength while maintaining functionality, as the outer peripheral gear is formed without increasing the number of parts or bonding steps, simplifying the manufacturing process and ensuring durability.
Implementation Method 1
the coupling portion is bonded to a coupling bonding portion provided on a radially inner side of the outer peripheral gear in the second holding member
Data Source
AI summary
A carrier is implemented which is capable of reducing the number of parts and the number of bonding steps. The carrier includes a pair of holding members that hold from both sides in an axial direction L a pinion shaft supporting a pinion gear. A first holding member as one of the pair of holding members includes a coupling portion extending in the axial direction L toward a second holding member as the other holding member. The second holding member is a disc-like member, and has an external outer peripheral gear integrally formed in its outer peripheral portion. The coupling portion is bonded to a coupling bonding portion provided on a radially inner side R1 of the outer peripheral gear in the second holding member.