Inclined Battery Storage Layout for Stable Electric Work Vehicles
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Solution Overview
Problem
The unbalanced weight distribution caused by loading heavy objects on the front portion of a work vehicle, such as a hydraulic excavator, leads to instability, particularly when using electric power sources like batteries, which are traditionally positioned vertically and require frequent replacement.
Innovation Solution
The vehicle design includes a detachable battery storage unit positioned on the opposite side of the loading unit, inclined to balance weight distribution, with an upward-facing opening for easy battery access, reducing the effort required for attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery storage unit is positioned vertically above the ground, then the battery is easily accessible for replacement, but the vehicle's posture becomes unstable when loaded objects are placed on the loading unit
Solution Approach 1:
The battery storage unit is oriented at an angle of 10 to 45 degrees relative to the ground, transitioning from a vertical position to an inclined position. This dimensional change allows the unit to extend in the width direction of the vehicle body, balancing the center of gravity while maintaining accessibility through the upward-facing opening.
Solution Approach 2:
By positioning the battery storage unit on the opposite side of the loading unit and inclining it to extend in the width direction, the design creates a counterbalancing effect. The battery storage unit acts as a counterweight to offset the forward weight from the loading unit, stabilizing the vehicle's center of gravity and preventing posture instability during operation.
2Stability of the object's composition
If the battery storage unit is positioned to balance the weight distribution, then the vehicle posture becomes stable, but the battery attachment and detachment require more effort
Solution Approach 1:
The battery storage unit is inclined at 10 to 45 degrees and opens upward, creating an accessible opening that facilitates easy battery insertion and removal. This angular orientation allows operators to access batteries from above without requiring excessive force, even while maintaining the counterbalancing function.
Solution Approach 2:
The opening of the battery storage unit is specifically oriented upward to facilitate easy access, while the body of the unit is inclined to provide counterbalancing. This local differentiation allows different parts of the same component to serve different functions: the opening orientation prioritizes ease of operation, while the overall inclination prioritizes stability.
3Adaptability or versatility
If the loading unit is positioned to extend forward for excavation work, then the excavation capability is improved, but the weight distribution becomes unbalanced causing vehicle instability
Solution Approach 1:
The battery storage unit is positioned on the opposite side of the loading unit and inclined to extend in the width direction, creating a counterbalancing effect. This counterweight arrangement offsets the forward weight concentration from the loading unit, maintaining vehicle stability during excavation operations.
Solution Approach 2:
The design accepts the asymmetric weight distribution caused by the forward-positioned loading unit necessary for excavation work. The battery storage unit is asymmetrically positioned and inclined to compensate for this imbalance, allowing the vehicle to maintain stability despite the asymmetric functional requirements of the loading unit.
Data Source
AI summary
A work vehicle includes an electric drive source, and a vehicle main body part to which a traveling part is provided. The vehicle main body part includes: a loading part that extends in a first direction and that can operate with respect to the vehicle main body part; and a removable battery storage unit that extends in a second direction which is the reverse direction of the first direction. The loading part loads an object to be loaded. The removable battery storage unit includes a storage section capable of storing a removable battery. An opening is formed in an upper part of the storage section. The opening is oriented upward, and an axis line along a battery attachment/removal direction of the storage section is inclined so as to be oriented in the first direction or the second direction.