Construction Machine Charger Frame for Service Access
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Solution Overview
Problem
The compact design of electric construction machines with vertical alignment of the motor and hydraulic pump restricts accessibility and installation of high-power charging devices, complicating repairs and servicing due to spatial constraints.
Innovation Solution
A bracket with a drawer guide above the energy storage device supports a modular frame for charging interface modules, allowing easy extension and swiveling for improved access, and includes grounding and cooling features to facilitate component replacement and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the charging device is installed directly above the energy storage device in a compact drive compartment, then the charging power can be increased, but the accessibility to components for repairs or servicing deteriorates
Solution Approach 1:
The frame of the charging device is designed to be movable relative to the energy storage device, transitioning between a retracted position (installed state) and an extended position (service state). This dynamic configuration allows the frame to be pulled out along guide rails, providing adequate working space for repairs while maintaining compact installation when not in use.
2Ease of repair
If the frame is extended out of the drive compartment for servicing, then the accessibility to components improves, but the working space within the drive compartment decreases
Solution Approach 1:
The charging device is segmented into a fixed part (energy storage device) and a movable part (frame with charging interface modules). The frame can be independently extended along guide rails, allowing servicing operations without permanently reducing the drive compartment's working space. The segmented design enables the frame to occupy minimal space during normal operation while providing full access during maintenance.
3Adaptability or versatility
If multiple charging interface modules are installed in the frame, then the adaptability for different charging powers is improved, but the device complexity increases
Solution Approach 1:
The frame is designed as a universal mounting structure that can accommodate different types and numbers of charging interface modules. Standardized mounting positions and electrical connections allow the same frame to support various charging configurations, reducing overall system complexity while maintaining adaptability for different charging power requirements.
Data Source
AI summary
An electric construction machine is provided of the type that has an electric drive train and/or an electric working unit. The machine includes an electric energy storage device for supplying the construction machine with electrical energy, and a charging device for charging the energy storage device. The charging device is arranged above the electric energy storage device in a drive compartment which can be closed by a cover. In order to achieve advantageous maintenance conditions, a bracket is arranged in the drive compartment above the electric energy storage device, which bracket comprises a drawer guide for a frame of the charging device. The frame may include slide-in guides for charging interface modules.