Integrated Drive Axle Parking Brake Layout for Easier Maintenance
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Solution Overview
Problem
Existing parking braking systems in vehicles have complex locking mechanisms and power assembly structures, leading to potential fit issues and inconvenient maintenance.
Innovation Solution
An integrated drive axle assembly with a drive motor connected to an intermediate shaft through an intermediate gear, incorporating a parking brake caliper with an accommodating space for a parking brake disc, which simplifies the structure and enhances fitting accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex locking mechanism and power assembly structure are used in the parking braking system, then the braking reliability is improved, but the device complexity increases and maintenance becomes inconvenient
Solution Approach 1:
The patent combines the parking brake disc with the intermediate shaft by directly connecting them, eliminating the need for separate locking mechanisms and power assembly structures. This merging of components simplifies the overall structure while maintaining braking reliability through the direct mechanical connection between the brake disc and the differential mechanism.
Solution Approach 2:
The intermediate shaft serves multiple functions: it transmits torque from the drive motor through the intermediate gear, supports the parking brake disc, and provides the mounting structure for the differential mechanism. This multi-functionality reduces the number of separate components needed, thereby simplifying the structure while ensuring reliable braking operation.
2Reliability
If a complex locking mechanism and power assembly structure are used in the parking braking system, then the braking reliability is improved, but the ease of repair deteriorates
Solution Approach 1:
By merging the parking brake disc with the intermediate shaft into a single integrated component, the patent reduces the number of parts that need to be disassembled during maintenance. The direct connection eliminates separate locking mechanisms and power assemblies, making the system easier to access, inspect, and repair while maintaining braking reliability.
3Adaptability or versatility
If a long dimensional chain is used in the power assembly structure, then the adaptability is improved, but the manufacturing precision deteriorates due to fit clearance
Solution Approach 1:
The patent merges the parking brake disc with the intermediate shaft, creating a short dimensional chain with direct mechanical connection. This eliminates multiple intermediate interfaces and fit clearances that would accumulate in a long dimensional chain, thereby improving manufacturing precision and fitting accuracy while maintaining structural adaptability through the integrated design.
Data Source
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AI summary
An integrated drive axle assembly and a vehicle. The integrated drive axle assembly comprises a drive motor, a main reduction axle, a parking brake caliper and a parking brake disc, the drive motor and the wheels of a vehicle both being connected to the main reduction axle; the main reduction axle comprises an intermediate shaft and intermediate gears in fit connection with the intermediate shaft, an output shaft of the drive motor being in fit connection with an intermediate gear; the parking brake caliper is provided with an accommodating space; part of the structure of the parking brake disc is located in the accommodating space, and the parking brake disc is connected to the intermediate shaft.