Steering Gearbox Subframe Mounting for Drive Device Integration
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Solution Overview
Problem
Existing vehicle mounting structures for drive and steering devices face challenges in sharing a subframe between electric and internal combustion engines, requiring additional brackets that increase weight, cost, and reduce design freedom due to insufficient gap issues when scaling motor/speed reducer assemblies.
Innovation Solution
A structure that mounts the gear box of the steering device on a subframe with a roll mount and mounting bracket, allowing the motor/speed reducer assembly to be supported without a separate bracket, enabling the use of a common subframe for both types of engines and optimizing the placement of components to reduce weight and improve design freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a separate bracket is added to the subframe to mount the motor/speed reducer assembly, then the drive device can be mounted on the subframe, but the number of working processes, weight, and cost increase
Solution Approach 1:
The mounting bracket is integrated into the gear box structure, merging the steering device mounting function with the drive device mounting function. This eliminates the need for a separate bracket on the subframe, reducing the number of parts and assembly processes while maintaining the ability to mount both the steering device and motor/speed reducer assembly on the same subframe
2Shape
If the motor/speed reducer assembly is moved toward the front side to solve insufficient gap, then the gap issue is resolved, but the vehicle body size increases and design freedom decreases
Solution Approach 1:
Instead of moving the motor/speed reducer assembly in the longitudinal direction (front-rear), the gear box is rotated to change its orientation. The input shaft is positioned above the output shaft, creating vertical separation between the steering device and drive device. This dimensional change resolves the gap issue without increasing the vehicle body size, preserving design freedom
3Device complexity
If the gear box arrangement and motor/speed reducer assembly are fixed, then the mounting structure is determined, but the structure cannot be applied to various types of gear boxes
Solution Approach 1:
The mounting bracket is designed with universal mounting holes that can accommodate different gear box types and configurations. The bracket integrates multiple functions: mounting the gear box to the subframe, providing structural support, and allowing flexible positioning of the motor/speed reducer assembly. This universal design enables the same mounting structure to be applied to various gear box types without modification
Data Source
AI summary
A structure can be used for mounting a driving device and a steering device on a vehicle body of a vehicle. The structure includes a gear box of a steering device mounted on a subframe, a roll mount, a mounting bracket coupled to the roll mount, and a motor/speed reducer assembly fastened to and supported by the gear box by the roll mount and the mounting bracket coupled to the roll mount.