In-wheel Drive Apparatus with Segmented Decelerator Housing
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Solution Overview
Problem
Conventional in-wheel drive systems face challenges in minimizing the distance between the wheel center and the chassis coupling section, leading to reduced chassis durability and increased complexity and cost in replacing or repairing the decelerator module.
Innovation Solution
The in-wheel drive apparatus features a motor housing with a mounting recess on its outer surface for the decelerator module, allowing it to be detachably mounted, reducing the size and weight of the system and facilitating easier maintenance, while the rotor and rear cover designs minimize the distance to the chassis coupling section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the decelerator module is installed inside the motor housing, then the structure is compact, but it requires disassembly of the motor housing and exclusive jigs for replacement or repair, increasing maintenance time and cost
Solution Approach 1:
The motor housing is divided into two separate components: the main motor housing and the decelerator housing. The decelerator module is installed in the decelerator housing, which is externally coupled to the motor housing. This segmentation allows the decelerator module to be accessed, removed, or repaired independently without disassembling the motor housing, thereby improving maintenance accessibility while maintaining structural compactness.
2Strength
If the distance from wheel center to chassis coupling section is reduced, then chassis durability is enhanced, but the conventional shapes of rear cover and motor make it difficult to minimize this distance
Solution Approach 1:
The decelerator housing is designed to extend axially from the motor housing in a direction perpendicular to the rotational axis of the motor. This dimensional arrangement allows the chassis coupling section to be positioned closer to the wheel center by utilizing the axial space, thereby minimizing the distance from wheel center to chassis coupling section and enhancing chassis durability without excessive structural complexity.
3Ease of repair
If the decelerator module is detachably mounted on the outer surface of the motor housing, then replacement or repair becomes easier, but the structure becomes more complex
Solution Approach 1:
The decelerator module is housed in a separate decelerator housing that is detachably coupled to the motor housing via coupling protrusions and recesses. This segmentation enables the decelerator module to be easily removed or replaced by simply detaching the decelerator housing, improving ease of repair while adding minimal structural complexity through the use of simple coupling features.
Data Source
AI summary
The present disclosure provides an in-wheel drive apparatus. The apparatus includes a motor housing open at one side thereof, a motor unit mounted within the motor housing, and a rear cover coupled at one side thereof to the motor housing to close the open side of the motor housing and coupled at the other side thereof to a trailing arm. The rear cover includes a planar section constituting an outer peripheral surface of the rear cover; and a cover recess connected to an inner peripheral surface of the planar section to be integrally formed with the planar section and depressed from the planar section towards the rotor to form a recess to which the trailing arm is coupled.