Planetary Gearset Integrally Formed Carrier Plate
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Solution Overview
Problem
Existing planetary gearsets face challenges in connecting a shift element in a space-efficient, simplified, and cost-effective manner, as current solutions are complex and costly.
Innovation Solution
A rotationally fixed connection between a carrier plate of the planetary gear carrier and a torque-transmitting component of the adjacent shift element, utilizing an integrally formed disk carrier, along with an annular cylinder that serves as an axial abutment, pressure cylinder, lubrication oil collector, and pressure equalization chamber, allowing for axial fixation of planetary gear bolts and efficient lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate carrier plate and disk carrier are used, then assembly flexibility is improved, but device complexity and space consumption increase
Solution Approach 1:
The patent merges the carrier plate and disk carrier into a single integrally formed component. The carrier plate includes both the first and second carrier plates as well as the disk carrier, eliminating the need for separate parts and reducing assembly complexity while maintaining structural functionality.
Solution Approach 2:
The integrally formed carrier plate serves multiple functions: it supports planetary gears, transmits torque, and acts as a structural connector between the planetary gearset and shift element. This multi-functionality reduces the number of components needed while maintaining assembly flexibility.
2Ease of manufacture
If multiple separate components are used for coupling, then manufacturing flexibility is improved, but manufacturing cost increases
Solution Approach 1:
The carrier plate and disk carrier are manufactured as a single integral component, reducing the number of parts that need to be manufactured, inventoried, and assembled. This reduces manufacturing complexity and cost while maintaining the necessary functional flexibility.
3Strength
If conventional connection methods are used, then structural integrity is maintained, but axial length increases
Solution Approach 1:
By integrating the disk carrier directly into the carrier plate structure, the patent eliminates the need for separate connection components that would increase axial length. The integral design maintains structural integrity through direct material continuity while minimizing the axial dimension.
4Reliability
If separate lubrication and pressure systems are used, then functional reliability is improved, but device complexity increases
Solution Approach 1:
The lubrication oil chamber and pressure chamber are integrated into the same annular cylinder structure. The bottom of the annular cylinder serves dual purposes as both the lubrication oil chamber and the axial abutment, while the pressure chamber utilizes the same structural space. This reduces the number of separate systems while maintaining functional reliability through proper pressure and lubrication delivery.
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 compact, cost-effective structure with reduced axial length, enabling a close and efficient coupling of the planetary gearset and shift element, while ensuring reliable lubrication and pressure actuation.
Implementation Method 1
The annular cylinder has inside it an axially sliding annular piston that with the annular cylinder forms a pressure chamber, which is supplied with pressure oil via a duct system to actuate the shift element, i.e., to apply an axial force on the disk set
Implementation Method 2
the bottom of the annular cylinder has an axially directed recess and so forms a lubrication oil chamber which on its radially inner inlet side, communicates with a lubrication oil supply system and on its radially outer outlet side communicates with axial bores in the planetary gear bolts, from where the lubrication oil passes, via radial bores, to the lubrication points of the planetary gears
Implementation Method 3
the annular cylinder has a radially inner, extended cylindrical wall which, together with the rear side of the piston, forms a pressure equalization chamber. This is supplied with lubrication oil via a bore in the extended cylindrical wall, i.e., not under pressure, so that for the piston an equalization of the dynamic pressure, i.e., a speed-independent build-up of pressure in the clutch, takes place
Data Source
AI summary
A planetary gearset (2) consisting of a planetary gear carrier (4) that holds planetary gears (5) with a first and a second carrier plate (4b, 7), each having respective bores (4d, 7a) to receive planetary gear bolts (6) that can be fixed axially. It is proposed that the planetary gear carrier is connected in a rotationally fixed manner by the second carrier plate to a torque-transmitting component (8) of an adjacent shift element (3).