In-Wheel Steering Pulley Layout for Driven-Pulley Clearance
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Solution Overview
Problem
Conventional steering devices for in-wheel drive systems face challenges in securing space above the driven pulley due to the single pulley structure, leading to increased housing size and difficulty in installing necessary components.
Innovation Solution
A steering device design featuring a dual-stage pulley system with integrally coupled first and second stage pulleys, a pulley shaft between the motor and input shaft, and adjustable belt tension through cam bolt assemblies, allowing for a wider space above the driven pulley and improved component installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pulley structure is used to transmit rotational driving force, then the structure is simple, but the gap between the housing and driven pulley narrows, making it difficult to secure space for installing necessary devices above the driven pulley
Solution Approach 1:
The single pulley structure is segmented into two pulleys (first pulley and second pulley) that are adjacently coupled to the pulley shaft. This segmentation allows the belt to wrap around both pulleys, creating a more distributed power transmission path that increases the gap between the housing and the driven pulley, thereby securing space for installing additional devices above the driven pulley.
Solution Approach 2:
The invention transitions from a single-plane pulley arrangement to a multi-dimensional configuration where the first and second pulleys are stacked adjacently on the pulley shaft. This dimensional change in the vertical direction allows better spatial distribution of components, increasing the clearance above the driven pulley while maintaining effective power transmission through the belt.
2Area of stationary object
If the size of the housing is increased to secure space above the driven pulley, then the installation space is sufficient, but the overall height of the steering device increases
Solution Approach 1:
By segmenting the pulley system into two adjacently coupled pulleys, the invention creates sufficient installation space above the driven pulley without needing to increase the housing size. The segmented configuration optimizes the use of existing internal space, allowing component installation while maintaining a compact overall height.
Solution Approach 2:
The invention employs a flexible belt connection between the driving pulley and the first pulley, and another flexible belt between the second pulley and the driven pulley. This dynamic belt-driven system allows for adjusted spacing and tension, enabling sufficient clearance above the driven pulley without requiring a larger housing, thus maintaining a compact overall height.
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 dual-stage pulley system enhances space utilization, facilitates the installation of additional components, and maintains balanced operation by adjusting belt tension, thereby optimizing the steering device's efficiency and stability.
Implementation Method 1
a first belt connecting the driving pulley and the first stage pulley to transmit power
Implementation Method 2
a second belt connecting the second stage pulley and the driven pulley to transmit power
Implementation Method 3
a first stage pulley and a second stage pulley that are adjacently coupled up and down to a pulley shaft parallel to the motor shaft and the input shaft and rotate integrally
Data Source
AI summary
A steering device and a corner module including the same are disclosed. A steering device according to an aspect of the present disclosure is to steer an in-wheel drive device, and the steering device may include: a housing; a drive motor supported on the housing and having a motor shaft extending up and down; a driving pulley coupled to the motor shaft; a speed reducer including an input shaft parallel to the motor shaft and an output shaft arranged coaxially with the input shaft and coupled to the in-wheel drive device; a driven pulley coupled to the input shaft; a first stage pulley and a second stage pulley that are adjacently coupled up and down to a pulley shaft parallel to the motor shaft and the input shaft and rotate integrally; a first belt connecting the driving pulley and the first stage pulley to transmit power; and a second belt connecting the second stage pulley and the driven pulley to transmit power.