Parking Lock Supporting Element Play for Tolerance Compensation
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Solution Overview
Problem
Existing parking lock systems require complex adjustments to compensate for manufacturing tolerances, increasing installation effort and preventing the parking lock from being assembled as a prefabricated module.
Innovation Solution
A parking lock with a supporting element connected to the housing to allow for play, enabling internal compensation of manufacturing tolerances and self-adjustment, allowing for easier assembly and installation as a module without needing to compensate for inaccuracies during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the parking lock is rigidly fixed to the transmission housing, then the structure is stable and precise, but manufacturing tolerances cannot be compensated and adjustment work is required during assembly
Solution Approach 1:
The supporting element is designed with a floating connection to the transmission housing, allowing it to move dynamically within a limited range. This dynamic capability enables the supporting element to self-adjust and compensate for manufacturing tolerances between the housing centering bore and the actuating mechanism contact surface, eliminating the need for manual adjustment during assembly while maintaining precise alignment.
2Ease of manufacture
If the parking lock is rigidly fixed to the transmission housing, then the structure is stable, but the parking lock cannot be provided as a prefabricated module and installation effort increases
Solution Approach 1:
The parking lock is designed as a modular assembly with a supporting element that can be pre-assembled with the actuating mechanism and locking pawl as a complete module. The floating connection of the supporting element to the transmission housing allows this module to be installed as a unit without requiring separate adjustment of individual components, thereby simplifying installation while maintaining manufacturing precision.
3Manufacturing precision
If manufacturing tolerances are strictly compensated during assembly, then alignment precision is achieved, but assembly time and cycle time increase
Solution Approach 1:
The supporting element is designed with built-in floating capability that enables it to automatically self-adjust and compensate for manufacturing tolerances during the assembly process. This self-service mechanism eliminates the need for operators to perform manual measurement and adjustment operations, thereby maintaining high alignment precision while significantly reducing assembly time and increasing productivity.
Data Source
AI summary
A parking lock has a parking lock housing (20), a locking pawl (12) which has a ratchet (16) that can be locked in a parking lock wheel (56) and a pawl profile (44) arranged on the rear side of the ratchet (16), an actuating unit (24) which acts upon the pawl profile (44) when the parking lock (10) is engaged and thereby rotates the locking pawl (12) about a rotational axis (14) relative to the parking lock housing (20), and a supporting element (18), on which the actuating unit (24) is supported in the engaged state (P) and in the disengaged state (nP) of the parking lock (10) at different positions. The supporting element (18) is connected to the parking lock housing (20) so as to have play.