Power-Split Driveline With Planetary Gearset and Electric Converters
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Solution Overview
Problem
Existing power-split drive trains for working machines lack a simple and compact design, which hinders efficiency and productivity in agricultural and similar applications.
Innovation Solution
A power-split drive train with a main drive element, three rotational-speed-variable drive output shafts, and a continuously variable power-split transmission, featuring additional drive units with energy converters connected via an electric line, including a planetary gearset in at least one unit, allowing for rotational speed variability and torque distribution across multiple branches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a power-split transmission with multiple additional drive units is used to enable rotational speed variability at multiple drive output shafts, then productivity and efficiency are improved, but device complexity increases
Solution Approach 1:
The first additional drive unit is designed to serve multiple functions: it can independently drive the first drive output shaft, independently drive the second drive output shaft via connection to the second additional drive unit, and independently drive the third drive output shaft via connection to the third additional drive unit. This multi-functionality allows a single complex drive unit to replace what would otherwise require multiple separate drive units, thereby improving productivity across multiple outputs while managing device complexity through functional integration.
Solution Approach 2:
The power-split transmission is divided into multiple additional drive units (first, second, and third), each capable of independent operation. This segmentation allows each drive unit to be optimized for specific functions while maintaining overall system flexibility. The first additional drive unit can operate independently for the first output shaft, or connect to drive other shafts, providing modular functionality that improves productivity without requiring a completely integrated complex system.
2Adaptability or versatility
If energy converters are connected via electric lines to enable flexible power distribution, then adaptability is improved, but device complexity increases
Solution Approach 1:
Electric lines serve as intermediary elements that connect the energy converters in the additional drive units, enabling flexible power distribution without requiring direct mechanical connections. This allows the first additional drive unit to electrically connect to and control the second and third additional drive units, providing adaptability in power distribution while simplifying the overall system architecture compared to purely mechanical coupling systems.
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 enhances efficiency, productivity, and compactness by enabling flexible power distribution and reduced energy converter count, supporting various operating modes with fully or partially continuously variable drive outputs.
Implementation Method 1
at least the first additional drive unit, in addition to the energy converter, also comprises a planetary gearset (4a), wherein the main drive element (1) is connected by a first shaft (W1) to the planetary gearset (4a) of the first additional drive unit (2a), wherein the first drive output shaft (Ab1) is connected by a second shaft (W2) to the planetary gearset (4a) of the first additional drive unit (2a)
Implementation Method 2
each of the three additional drive units (2a, 2b, 2c) comprises an energy converter (3a, 3b, 3c), the energy converters (3a, 3b, 3c) being connected and in particular functionally connected to one another by an electric line (5)
Data Source
AI summary
A power-split drive train having a main drive, three output shafts (Ab1, Ab2, Ab3) and a continuously variable powersplit transmission with three additional drive units. The transmission enables rotational speed variability at the shafts (Ab1, Ab2, Ab3). Furthermore, each drive unit (2a, 2b, 2c) has a respective energy converter (3a, 3b, 3c) which are all electrically connected. Drive unit (2a) has planetary gearset (4a) that is connected, via a first shaft (W1), to the main drive. Shaft (Ab1) is connected, via a second shaft (W2), to gearset (4a) and energy converter (3a) is connected, via a third shaft (W3), to gearset (4a). The drive unit (2a) is at least indirectly connected to drive unit (2b) which is connected by a fifth shaft (W5) to shaft (Ab2). Drive unit (2a) is at least indirectly connected to drive unit (2c) which is connected by a seventh shaft (W7) to shaft (Ab3).