Integrated Planetary Carrier Driven Hatch Transmission
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Solution Overview
Problem
Current driven hatch arrangements for motor vehicles are costly and prone to jamming due to structural space restrictions and varying forces acting on the transmission, which increases the risk of mechanical failure.
Innovation Solution
A cost-effective driven hatch arrangement featuring a motor with a motor shaft and planetary gear system, where the driven shaft is produced in one piece with the planetary carrier and bearing pins, allowing for axial displacement of the motor pinion and using molding production processes like plastic injection molding to reduce contamination and assembly complexity, thereby minimizing jamming risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate components are used for planetary carrier and bearing pins, then assembly flexibility is improved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent combines the planetary carrier and bearing pins into a single integrated component produced by injection molding. This merging eliminates the need for separate manufacturing and assembly steps, reducing both manufacturing cost and assembly complexity while maintaining functional performance.
2Reliability
If extensive drive solutions are selected to meet structural space restrictions, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The integrated planetary carrier and bearing pin design simplifies the transmission structure while maintaining reliability through precise injection molding technology, avoiding the need for extensive and expensive drive solutions.
Solution Approach 2:
The patent uses injection molding parameters to achieve precise geometric accuracy and surface finish of the integrated component, ensuring transmission reliability without requiring complex additional components.
3Manufacturing precision
If traditional assembly methods are used for planetary carrier and bearing pins, then manufacturing precision is improved, but production time and cost increase
Solution Approach 1:
The injection molding process creates the planetary carrier and bearing pins as a pre-assembled integrated component, eliminating subsequent assembly steps and significantly improving production efficiency while maintaining manufacturing precision through mold-based geometry control.
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 solution reduces production costs, minimizes the risk of transmission jamming, and enhances operational reliability by eliminating the need for separate component assembly and fastening, while allowing for flexible material selection and reduced contamination risks.
Implementation Method 1
at least one planetary drive with a sun gear, planetary carriers with planetary rolling elements arranged on bearing pins, and an annulus
Data Source
AI summary
A driven hatch arrangement is provided, particularly a rear hatch arrangement, for a motor vehicle with a hatch and with a hatch drive for opening and/or closing the hatch, with the hatch drive comprising a motor with a motor shaft and a motor pinion and at least one planetary gear with a sun gear, planetary carriers with planetary rolling elements arranged on bearing pins, and an annulus, with the sun wheel of the planetary gear being formed by the motor pinion and a driven shaft being driven via the planetary gear, in which the driven shaft is embodied in one piece with a planetary carrier including the bearing pins for planetary rolling elements.