Eccentric Drive Unit With Integrated Rod Guidance for Higher Torque
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive units for automotive applications require significant design effort and manufacturing costs due to the need for additional guides and spring elements to achieve effective torque transmission, especially when using low direct voltage electric motor drives.
Innovation Solution
A drive unit design featuring a guide cam connected to the drive and a guide recess on the actuating rod, eliminating the need for external guides and additional springs, allowing for linear actuation and increased torque without additional housing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional guides and spring elements are used to achieve effective torque transmission, then the reliability of power transmission is improved, but the device complexity and manufacturing costs increase
Solution Approach 1:
The guide means is integrated into the drive cam itself, combining the cam's torque transmission function with the guide function. The guide means and counter-guide means form an integrated guiding system that eliminates the need for separate external guides and spring elements, thereby maintaining reliable power transmission while reducing structural complexity.
Solution Approach 2:
The drive cam serves multiple functions: it transmits torque through its eccentric design and simultaneously provides guiding action through the integrated guide means. This multi-functionality eliminates the need for separate guiding components, reducing device complexity while maintaining effective torque transmission.
2Reliability
If additional guides and spring elements are provided, then the actuation reliability is improved, but the manufacturing costs and design effort increase
Solution Approach 1:
The guide means is merged with the drive cam, creating a single integrated component that performs both torque transmission and guiding functions. This integration reduces the number of parts that need to be manufactured and assembled, thereby reducing manufacturing costs and design effort while maintaining actuation reliability.
Solution Approach 2:
The guiding function is extracted from separate external guide components and incorporated directly into the drive cam structure. This eliminates the need for additional independent guiding elements and their associated mounting requirements, simplifying manufacturing while ensuring reliable actuation.
3Stability of the object's composition
If external guides and springs are used, then the actuating rod guidance is improved, but the device complexity and space requirements increase
Solution Approach 1:
The guide means is integrated into the drive cam, which is already a necessary component of the drive unit. This integration provides stable guidance for the actuating rod without requiring additional external guide components or increased housing space, as the guiding function is embedded within the existing compact drive structure.
4Power
If additional spring elements are provided for torque transmission, then the power transmission effectiveness is improved, but the device complexity increases
Solution Approach 1:
The guide means integrated into the drive cam provides mechanical guidance that enhances torque transmission effectiveness by ensuring proper alignment and contact between the drive cam and actuating rod. This integrated approach eliminates the need for separate spring elements while maintaining effective power transmission, thereby reducing component quantity and device complexity.
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 design simplifies the structure, reduces manufacturing costs, and enables linear movement of the actuating rod with increased torque output, while eliminating the need for external guides and springs, resulting in a more compact and cost-effective solution.
Implementation Method 1
a drive cam of the drive engages in a drive recess in the actuating rod
Implementation Method 2
the guide means is designed as a guide cam and the counter-guide means is a guide recess in the actuating rod, the interaction between the guide cam and the guide recess ensuring that the actuating rod is largely acted upon linearly in one actuation direction
Implementation Method 3
with an electric motor drive
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The invention relates to a drive unit for motor-vehicle applications, comprising an electric-motor drive (1, 2) and an actuation rod (3), which is mounted, at one end (3a), on the drive (1, 2) and is acted upon by the drive. The drive (1, 2) acts eccentrically on the actuation rod (3). For this purpose, a drive cam (9) of the drive (1, 2) engages in a drive cut-out (10) in the actuation rod (3). In addition, according to the invention, a guide means (11) connected to the drive (1, 2) is provided, which guide means cooperates with a counter guide means (12) on the actuation rod (3) in order to guide the actuation rod.