Electric Work Vehicle Battery Pack Pivoting Guide Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric work vehicles face challenges in efficiently loading and unloading battery packs due to complex configurations and high costs, as well as vibration transmission issues during travel, which affect the battery pack's stability and longevity.
Innovation Solution
The implementation of a guiding unit in the battery container and a guided unit in the battery pack, utilizing rollers and engaging portions to facilitate easy loading and unloading by pivoting the battery pack, combined with vibration-isolating rubber cushions to prevent vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex locking mechanism with multiple brackets and shafts is used to secure the battery pack, then the battery pack can be firmly fixed to the vehicle body, but the device complexity increases and the loading/unloading process becomes more time-consuming
Solution Approach 1:
The locking mechanism is divided into a holding portion with a holding arm and a vehicle body-side locking portion with a locking protrusion. The holding arm can rotate between a locked position (engaging with the locking protrusion) and an unlocked position, allowing simple yet effective segmentation of the fixation function.
Solution Approach 2:
The core fixation function is extracted to a single locking arm mechanism that rotates to engage or disengage from the locking protrusion. This eliminates the need for complex multi-component locking systems while maintaining reliable fixation during operation.
2Reliability
If multiple operational steps (holding portion displacement, bracket joining, buffer reception) are required to load the battery pack, then the battery pack can be securely attached, but the loading time and operator effort increase significantly
Solution Approach 1:
The holding portion is pre-configured with the holding arm in a ready-to-engage position. The guiding rails are pre-positioned to guide the battery pack into the correct orientation, allowing the operator to simply move the battery pack forward without performing multiple intermediate operations.
Solution Approach 2:
The guiding rails automatically guide the battery pack into the correct position as it is moved forward. The locking arm automatically engages with the locking protrusion when the battery pack reaches the attached state, eliminating the need for manual intervention in multiple steps.
3Device complexity
If the battery pack is directly fixed to the vehicle body without vibration isolation, then the structure is simpler, but vibrations during travel transmit to the battery pack affecting its stability and longevity
Solution Approach 1:
A buffer portion with elastic buffering members is introduced as an intermediary between the battery pack and the vehicle body. The buffering members elastically deform to absorb vibrations and shocks during travel, protecting the battery pack while maintaining a relatively simple overall structure.
4Reliability
If a buffer portion with elastic members is added to receive the battery pack during loading, then vibration isolation is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The buffering function is localized to specific buffering members positioned at key contact points between the battery pack and the vehicle body. This provides effective vibration isolation only where needed, rather than requiring a complex system throughout the entire structure.
Solution Approach 2:
The buffer portion combines elastic buffering members with a support structure, creating a composite system that provides both mechanical support and vibration isolation. This allows effective damping while maintaining manufacturing feasibility through the use of standard elastic materials.
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 simplifies the loading and unloading process, reduces operator effort, and ensures the stability and longevity of the battery pack by preventing unwanted movement and vibration transmission during travel.
Implementation Method 1
the rollers function as pivot fulcrums for enabling, by engaging with the engaging portions, the battery pack to pivot for loading and unloading relative to the battery container
Implementation Method 2
the vibration-isolating members support the battery unit in a vibration-isolating manner between the battery case and the battery unit
Implementation Method 3
vibration-isolating rubber cushions to prevent vibration transmission
Data Source
AI summary
An electric work vehicle includes a battery container provided in a traveling vehicle body and including a guiding unit, and a battery pack removably attached to the battery container and including a guided unit. A pair of rollers are provided in one of the guiding unit and the guided unit, and a pair of engaging portion to be engaged with the rollers are provided in the other of the guiding unit and the guided unit. When the battery pack is loaded or unloaded onto/from the battery container at the loading/unloading position, the rollers engage with the engaging portions, thereby functioning as pivot fulcrums for enabling the battery pack to pivot for loading and unloading.