Electric Telehandler Layout for Wider Cab and Stable Counterbalance
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Solution Overview
Problem
Compact telehandlers face challenges in maintaining operator comfort and efficiency due to restricted cab width, which can lead to operator fatigue and reduced safety. Additionally, the transition from diesel to electric power systems complicates weight distribution and stability, requiring significant redesign and investment in new infrastructure.
Innovation Solution
The design incorporates a compact electric drive assembly with a high-voltage electric energy storage unit located aft of the cab to improve stability and counterbalance the lifting arm. The electric motor is positioned on the opposite side of the machine to the cab, allowing for flexible component placement. The drive assembly is mounted at multiple points, facilitating efficient assembly and minimizing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the machine width is reduced to improve access and maintain compact size, then the cab width is reduced, but operator comfort and efficiency deteriorate
Solution Approach 1:
The lifting arm is repositioned from a central or side location to an extended rearward position on the chassis. This spatial reconfiguration in the longitudinal dimension allows the cab to be widened in the lateral dimension without increasing the overall machine width, as the lifting arm no longer occupies the central space that would constrain cab dimensions.
2Object-generated harmful factors
If the diesel engine is removed to transition to electric power system, then environmental performance improves, but weight distribution and stability deteriorate
Solution Approach 1:
The high-voltage battery pack is strategically positioned on the chassis to function as a counterweight that compensates for the removal of the diesel engine. This placement restores the longitudinal weight distribution and maintains the machine's stability and center of gravity characteristics despite the power system transition.
Solution Approach 2:
The power system is changed from a diesel engine with associated weight characteristics to an electric power system comprising an electric motor and high-voltage battery pack. The mass, distribution, and positioning parameters of the electric components are optimized to replicate the stability characteristics of the original diesel-powered configuration.
3Ease of operation
If the lifting arm is repositioned to extend rearward to accommodate a wider cab, then operator comfort improves, but the structural complexity increases
Solution Approach 1:
The rearward extension of the chassis is designed to serve multiple functions: it provides the structural mounting for the repositioned lifting arm, creates the necessary space for the widened cab, and offers mounting locations for the electric power system components. This multi-functionality reduces the need for additional specialized structural elements.
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 1e
AI summary
A working machine having a front and a rear defined by the principal direction of travel, defining a fore-aft centreline, and comprising: a body mounted on a ground-engaging structure to permit movement of the machine over the ground; an operator cab mounted on the body towards a first side of the centreline; a single lifting arm pivotably mounted towards an aft end of the body; a drive assembly comprising a first electric motor for providing power to the ground-engaging structure; and at least one high voltage electric energy storage unit, located aft of the cab. The lifting arm is located within a lifting arm housing. The lifting arm housing comprises first and second sidewalls. The first electric motor is located to a second side of the centreline, opposite the first side of the centreline. The or each electric energy storage unit is located to the cab side of the lifting arm housing.