Park Lock Gear Assembly With Auxiliary Bearing for Impact Load Distribution
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Solution Overview
Problem
Existing park lock gear assemblies for vehicle transmission units concentrate impact loads on the rotor shaft bearing assembly, leading to high loads and a risk of damage, as these loads are not adequately distributed.
Innovation Solution
Incorporating an additional bearing assembly below the park lock gear to absorb and distribute impact loads, reducing the burden on the rotor shaft bearing assembly and enhancing speed stability through radial clearance and a non-rotatable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If impact loads are only received by the motor bearing assembly or rotor shaft bearing assembly, then the park lock gear assembly structure is simple, but the load on the rotor shaft bearing assembly becomes excessively high leading to damage risk
Solution Approach 1:
The patent divides the load-bearing function into multiple components by introducing a separate bearing assembly (18) between the park lock gear (15) and the housing (13). This segmentation allows the bearing assembly to specifically handle impact loads from the park lock gear, while the rotor shaft bearing assembly (14) focuses on supporting the rotor shaft (11), thereby distributing the load and improving reliability without excessive complexity.
2Force
If the bearing assembly is arranged in engagement with the park lock gear, then the load bearing capacity is maximized, but energy losses increase and speed stability decreases
Solution Approach 1:
The patent applies local quality by providing a radial clearance between the bearing assembly (18) and the park lock gear (15). This clearance creates a localized non-contact zone that reduces friction and energy losses during normal operation, while the bearing assembly remains positioned to absorb impact loads when they occur, thus balancing load bearing capacity with energy efficiency.
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
The additional bearing assembly effectively reduces the impact load on the rotor shaft bearing assembly, minimizing the risk of damage and improving speed stability by distributing loads and reducing engagement losses.
Implementation Method 1
impact loads that might occur on the transmission unit and/or on the motor unit are only received by the motor bearing assembly or the rotor shaft bearing assembly, and this can lead to a high load on the rotor shaft bearing assembly
Implementation Method 2
Because a radial clearance is provided between the park lock gear and the bearing assembly, the losses can be reduced and the speed stability increased
Data Source
AI summary
A park lock gear assembly for a transmission unit of a vehicle includes a transmission shaft, a park lock gear arranged on the transmission shaft, a housing unit of a motor unit and a bearing assembly. The housing unit has a portion extending parallel to the transmission shaft and adjacent to the park lock gear, and the bearing assembly is disposed between the park lock gear and the portion of the housing unit. The bearing assembly may be arranged with a radial clearance between the park lock gear and the portion of the housing unit. The bearing assembly may be arranged on the portion of the housing unit with the radial clearance between the bearing assembly and the park lock gear.