Electric Drive Layout With Horizontal Parking Brake Integration
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Solution Overview
Problem
Traditional electric gearbox designs for vehicles require additional space due to the vertical arrangement of parking brakes, leading to increased mechanical efficiency losses and space requirements.
Innovation Solution
A horizontally mounted parking brake assembly is integrated with the high-speed reduction gearbox (HSRU), reducing the overall footprint of the electric drive system by coexisting with the electric motor and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the parking brake is arranged vertically between the transmission and differential, then the parking brake can be integrated into the driveline, but additional space is required increasing the overall footprint
Solution Approach 1:
The patent reorients the parking brake assembly from a vertical arrangement to a horizontal arrangement, mounting it on the side of the transmission case rather than between the transmission and differential. This dimensional change allows the parking brake to coexist with the electric motor in a horizontal plane, reducing the vertical space requirements and overall footprint of the drive system.
2Ease of manufacture
If traditional vertical parking brake arrangement is used, then the parking brake can be mounted between transmission and differential, but the overall system footprint increases
Solution Approach 1:
The patent merges the parking brake assembly with the transmission case by mounting it horizontally on the side of the transmission. This integration allows the parking brake to share space with other driveline components, particularly the electric motor, thereby reducing the overall footprint without compromising manufacturability or assembly ease.
3Adaptability or versatility
If more driveline components including gearboxes and drive shafts are present, then power transmission functionality is achieved, but mechanical efficiency losses increase
Solution Approach 1:
The patent extracts and eliminates the driveshaft from the driveline by directly coupling the transmission output to the differential assembly. This removal of the intermediate driveshaft component reduces the number of mechanical connection points and potential sources of energy loss, thereby improving overall mechanical efficiency while maintaining full power transmission capability.
Data Source
AI summary
An electric drive system is herein provided. In one example, an electric drive system comprises an electric motor rotationally coupled to a high-speed reduction gear set (HSRU) and a parking brake assembly also coupled to the HSRU. The HSRU rotationally couples to a differential assembly via a pinion gear assembly including a pinion shaft and a bevel pinion gear pair.