Seat Frame Battery Layout for Compact Work Vehicles
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Solution Overview
Problem
Existing work vehicles with body frames, such as those described in JP 2013-52035A, face challenges in accommodating relatively large batteries required for electric or hybrid power systems, as they need to secure space for battery installation and ensure easy attachability and removability without hindering other components.
Innovation Solution
The body frame configuration includes a first frame section under the seating section, a second frame section extending upward from the rear of the first frame, and a third frame section extending rearward from the upper portion of the second frame, allowing the seat frames to be detachable and the battery to be positioned between these sections, optimizing space usage and facilitating easy battery installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a relatively large battery is installed in the work vehicle, then the power supply capacity is improved, but the space requirement increases and may conflict with other components
Solution Approach 1:
The battery is nested within the hollow internal space of the seat frame, utilizing the existing structural volume of the seat frame to accommodate the battery. This allows the battery to be integrated into the vehicle's existing structure without requiring additional external space, thereby resolving the contradiction between power supply capacity and space requirement
Solution Approach 2:
The seat frame is designed with a hollow internal space that provides a three-dimensional volume for battery installation. By utilizing the vertical and lateral dimensions of the seat frame's hollow structure, the battery can be positioned in a space that would otherwise be unused, effectively increasing power supply capacity without expanding the vehicle's external footprint
2Reliability
If the battery is permanently fixed in the body frame, then the power supply stability is improved, but the maintenance and replacement difficulty increases
Solution Approach 1:
The seat frame is divided into a hollow internal space that can accommodate the battery as a separate, removable component. This segmentation allows the battery to be independently accessed and replaced without disassembling the entire seat frame or body structure, thereby maintaining power supply stability during operation while enabling easy battery replacement for maintenance
Solution Approach 2:
The battery installation design transitions from a fixed permanent mounting to a dynamic removable configuration. The battery can be easily inserted into and removed from the hollow space of the seat frame, providing the flexibility needed for maintenance and replacement while maintaining stable power supply during normal operation
3Volume of moving object
If the seat frame structure is modified to accommodate the battery, then the space utilization is improved, but the structural complexity increases
Solution Approach 1:
The seat frame is designed with a hollow internal space that serves multiple functions: it provides structural support for the seat, defines the seating area boundaries, and simultaneously accommodates the battery. This multi-functionality increases space utilization without requiring additional separate structures, thereby avoiding increased structural complexity
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 allows for the secure installation of a large battery without obstructing other components, enhancing travel performance and productivity by simplifying battery attachment and maintenance processes.
Implementation Method 1
a motor configured to output motive power for travel with use of electric power supplied from the battery
Data Source
AI summary
A work vehicle according to the present disclosure includes a seat frame 33. A body frame includes a first frame section 21, a second frame section 22 extending upward from a rear portion of the first frame section 21, and a third frame section 23 extending rearward from an upper portion of the second frame section 22. An up-down section 33a of the seat frame 33 is attachable to the first frame section 21 and removable therefrom, and a front-rear section 33b of the seat frame 33 is attachable to the second frame section 22 or the third frame section 23 and removable therefrom. A battery 42 is between the up-down section 33a and the second frame section 22 and between the front-rear section 33b and the first frame section 21.