Electric Drivetrain Motor Assembly With Lateral Battery Packaging
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Solution Overview
Problem
Conventional power machine designs are not optimally suited for electrically powered systems, particularly those using rechargeable battery systems, due to space and power transmission requirements that differ from internal combustion engine-driven systems, leading to complications in design and installation of motor assemblies.
Innovation Solution
The power system assembly includes motor sub-assemblies with electric motors cantilevered from reduction assemblies, supported by bearing carriers, and aligned with power transmission axes, allowing for improved packaging, structural stability, and space availability for battery systems, with drive chains extending to multiple axle assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional power machine designs are used for electrically powered systems, then existing structural frameworks can be maintained, but space availability and power transmission efficiency deteriorate due to differing requirements from internal combustion engine-driven systems
Solution Approach 1:
The motor assembly is positioned in a laterally spaced relationship with the battery assembly, utilizing the lateral dimension rather than vertical or longitudinal spacing. This allows the motor to be mounted on the side of the battery assembly, effectively using three-dimensional space optimization to accommodate both components without compromising either space availability for batteries or adaptability to electric powertrains
2Volume of moving object
If motor assemblies are densely packaged to improve space utilization, then volume efficiency improves, but ease of installation and servicing deteriorates
Solution Approach 1:
The motor assembly is designed as a separable unit that can be independently removed from the battery assembly. This segmentation allows the motor to be serviced, replaced, or installed without requiring removal or disassembly of the battery assembly, thereby maintaining ease of operation while achieving efficient space utilization through lateral mounting
3Volume of moving object
If motor assemblies are laterally spaced from battery systems, then space availability for batteries improves, but device complexity increases due to additional mounting structures
Solution Approach 1:
The battery assembly serves multiple functions: it acts as both the power source and as a mounting structure for the motor assembly. The lateral surfaces of the battery assembly are designed to provide mounting points, eliminating the need for separate complex mounting structures and reducing overall device complexity while maintaining space availability
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
This configuration enables easier installation, servicing, and improved power transmission efficiency, while providing structural stability and space for rechargeable battery systems, enhancing overall operational characteristics of electrically powered power machines.
Implementation Method 1
an electric motor configured to operably transmit the rotational power to the bearing carrier via the reduction assembly
Implementation Method 2
The reduction assembly can be a gear box that can provide a speed reduction for power transmission between the electric motor and the bearing carrier
Implementation Method 3
configured to be fixedly attached at an outboard side to a first lateral side of a frame of the power machine to operably transmit rotational power to at least one tractive element of the power machine
Data Source
AI summary
A drivetrain assembly of a power machine can include a motor sub-assembly. The motor sub-assembly can include a bearing carrier, a reduction assembly, and an electric motor. The bearing carrier can be configured to be fixedly attached at an outboard side to a first lateral side of a frame of the power machine to operably transmit rotational power to at least one tractive element of the power machine. An outboard side of the reduction assembly can be fixedly attached to an inboard side of the bearing carrier. An inboard side of the electric motor can be fixedly attached to the outboard side of the reduction assembly and the electric motor can be configured to operably transmit the rotational power to the bearing carrier via the reduction assembly. At least part of the electric motor can laterally overlap with the bearing carrier.