Vehicle Gearbox Parking Lock Layout for Reduced Installation Space
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Solution Overview
Problem
Conventional parking lock devices require excessive installation space due to the parallel arrangement of the solenoid and latch lever, leading to increased friction and higher installation space, weight, and cost.
Innovation Solution
The parking lock device is designed with a solenoid, latch lever, and operating piston arranged in succession along a perpendicular displacement axis, utilizing a magnet element and a magnetic field to reduce installation space, and incorporating a locking pawl and operating cone to secure the wheel against rotation, with a pivot axis perpendicular to the displacement axis to minimize space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the solenoid and latch lever are arranged in parallel, then the installation space requirement increases, but the friction forces increase and device complexity increases
Solution Approach 1:
The patent applies dimensionality change by transitioning from a parallel arrangement (2D plane) to a sequential arrangement along the displacement axis (1D line). The solenoid, latch lever, and operating piston are positioned in succession along the displacement axis, converting a two-dimensional spatial relationship into a one-dimensional linear arrangement. This reduces the installation space requirement while simplifying the device structure by eliminating the need for lateral positioning and reducing friction forces.
2Volume of stationary object
If the pivot axis is arranged perpendicularly to the displacement axis, then the installation space requirement is reduced, but the solenoid arrangement becomes more constrained
Solution Approach 1:
The patent merges the solenoid's direction of action with the displacement axis of the operating piston. By aligning the solenoid's force vector parallel to the displacement axis, the design combines multiple functional requirements (solenoid actuation and piston displacement) into a single linear pathway. This integration reduces installation space while maintaining adaptability, as the unified arrangement simplifies the mechanical linkage and reduces the number of independent adjustment parameters needed.
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 significantly reduces the installation space and weight of the parking lock device while maintaining high security, allowing for efficient operation with low friction forces and cost-effective design.
Implementation Method 1
The solenoid has a magnet element 64 by means of which a magnetic field can be provided. The solenoid additionally has an operating element 66, which can be translationally moved by means of the magnetic field relative to the magnet element and relative to the latch lever 52
Data Source
AI summary
A parking lock device includes a parking lock wheel, a locking pawl moveable between a locked position and an unlocked position, and an operating piston displaceable along a displacement axis. A movement of the locking pawl between the locked position and the unlocked position can be effected. The parking lock device also includes a latch lever pivotable about a pivot axis, and a solenoid by means of which the latch lever can be pivoted from one position to the other position. The pivot axis runs perpendicularly to the displacement axis.