Detent Pawl Forming for Precise Load and Guide Surfaces
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Solution Overview
Problem
Existing parking lock systems for vehicles lack a simple and efficient method to introduce different functional surfaces on the detent pawl, which is crucial for secure engagement and disengagement with the parking lock wheel.
Innovation Solution
A method for producing a detent pawl that involves using a forming tool with a load portion and a guide portion to create a depression on the locking portion of the detent pawl in a single working step, allowing for the introduction of different functional surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple separate working steps are used to introduce different functional surfaces on the detent pawl, then the manufacturing precision can be maintained, but the productivity decreases and the manufacturing process becomes more complex
Solution Approach 1:
The patent combines multiple separate working steps into a single integrated forming process. The forming tool includes multiple forming elements that simultaneously create different functional surfaces (latching surface, locking surface, guide surface) on the detent pawl in one operation, thereby maintaining precision while significantly improving productivity
Solution Approach 2:
The forming tool is segmented into multiple independent forming elements, each responsible for creating a specific functional surface. This segmentation allows each element to be optimized for its specific function while working simultaneously, achieving both high precision and high efficiency in a single working step
2Manufacturing precision
If multiple separate working steps are used to introduce different functional surfaces on the detent pawl, then the manufacturing precision can be maintained, but the device complexity increases
Solution Approach 1:
Multiple separate manufacturing devices or processes are merged into a single forming tool with multiple forming elements. This consolidation reduces the overall device complexity by eliminating the need for multiple separate machines or sequential operations, while still achieving high manufacturing precision through the integrated design
3Productivity
If a single working step is used to introduce different functional surfaces on the detent pawl, then the productivity increases and the manufacturing process is simplified, but the manufacturing precision may be compromised
Solution Approach 1:
Each forming element in the forming tool is designed with specific local geometry and material properties optimized for creating its corresponding functional surface. This local quality approach ensures that each surface (latching, locking, guide) achieves the required precision even though all surfaces are formed simultaneously in a single working step
Solution Approach 2:
The forming tool is divided into multiple independent forming elements, each capable of precisely forming a specific functional surface. This segmentation allows each element to be independently optimized and positioned, ensuring high manufacturing precision is maintained while achieving high productivity through simultaneous operation
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 method enables the rapid and simple introduction of functional surfaces on the detent pawl, enhancing the operational reliability and ease of use in parking lock systems.
Implementation Method 1
forming the detent pawl blank by the forming tool in a forming direction, wherein a depression for receiving the locking catch is produced on the locking portion
Data Source
AI summary
Parking detent pawls are known which are suitable for securely holding a vehicle in a parked state. The aim of the invention is to provide a detent pawl for a parking lock which is characterized by a high degree of operational reliability. For this purpose, a method is proposed for producing a detent pawl with a latching section for engaging into a locking toothing, a support section for rotatably supporting the detent pawl about a rotational axis, and a locking section for resting against a locking bolt which can be moved along the detent pawl, having the following steps: providing a detent pawl blank; providing a shaping tool with a shaping contour, said shaping contour having a load section and a guide section; and shaping the detent pawl blank in a shaping direction by means of the shaping tool, wherein a depression for receiving the locking bolt is produced on the locking section, the load section defines a load region of the depression for supporting the locking bolt in a locking position, and the guide section defines a guide region of the depression for guiding the locking bolt during an actuation movement.