Transmission Parking Lock Actuator with Roller Carrier
Solution Overview
Problem
Existing parking lock actuating elements for transmissions are complex, prone to malfunction, and occupy significant structural space, making them costly and difficult to use for axial pawl actuation.
Innovation Solution
An actuating element comprising a positioning rod and a roller carrier with rollers that roll on a pivotable pawl and a guide element, where the roller carrier moves longitudinally along the positioning rod, eliminating the need for a separate guide and allowing for a compact, flexible design with reduced components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuating element uses a separate guide fixed to the housing for guiding the roller carrier, then the roller carrier can be guided along a predetermined path, but the device complexity increases and the structural space required increases
Solution Approach 1:
The positioning rod is integrated directly into the roller carrier, eliminating the need for a separate guide structure fixed to the housing. The positioning rod itself serves as the guiding element, reducing the number of components and simplifying the overall actuating element structure while maintaining the predetermined path guidance function.
Solution Approach 2:
The positioning rod performs multiple functions: it guides the roller carrier along the predetermined path, provides structural support, and enables the rolling motion transmission. This multi-functional design replaces the need for separate guiding components, reducing device complexity while maintaining guiding accuracy.
2Reliability
If the actuating element uses a separate guide fixed to the housing, then the roller carrier can be guided, but the manufacturing cost increases due to more components and connection points
Solution Approach 1:
By merging the guiding function into the positioning rod itself, the number of separate components and connection points is reduced. This simplifies the manufacturing process, reduces assembly steps, and lowers production costs while maintaining the necessary guiding function for the roller carrier.
3Reliability
If the actuating element uses a separate guide on the housing, then the roller carrier can move along a predetermined path, but the structural space required increases making axial pawl actuation difficult
Solution Approach 1:
The positioning rod is integrated into the roller carrier, eliminating the need for a separate guide structure on the housing. This integration significantly reduces the space occupied by the actuating element, enabling its use in compact applications such as axial pawl actuation where space is limited.
Solution Approach 2:
The positioning rod is nested within or integrated with the roller carrier structure, allowing the guiding function to be achieved within the existing component footprint rather than requiring additional external guide structures. This nesting approach minimizes the overall volume required for the actuating element.
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 reduces the risk of malfunction, minimizes structural space usage, and enables axial pawl actuation, allowing for more flexible placement of components within the parking lock.
Implementation Method 1
a first roller (13) for rolling on a first rolling surface (32) on a pivotable pawl (25)
Implementation Method 2
a second roller (14) for rolling on a second rolling surface (34) on a guide element (31)
Data Source
AI summary
A transmission parking lock and an actuating element (1) for the parking lock. The actuating element includes a pull rod (2) and a roller carrier (3) on which are arranged a first roller (13) for rolling on a first rolling surface on the pawl of the parking lock and a second roller (14) for rolling on a second rolling surface on a guide element, such that the roller carrier (3) can be moved along a predetermined path in the longitudinal direction of the pull rod (2). The roller carrier (3) can move longitudinally on the pull rod (2).