E-bike Battery Locking Device with Dual-Axis Lever
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Solution Overview
Problem
The integration of electrical energy storage devices into two-wheeled vehicles, such as e-bikes, often requires large frame cutouts, compromising frame rigidity and leading to collisions with other components due to the need for improved rigidity and positioning of these devices.
Innovation Solution
A locking device with a lever arrangement featuring a base plate, lever, and link guide with first and second bearing points and cam tracks, allowing for a series of pivoting processes around these points, reducing the pivoting range and minimizing collision risks, enabling larger or flatter energy storage installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrical energy storage device is integrated directly into the frame, then aesthetics are improved, but frame stiffness deteriorates due to large frame cutouts
Solution Approach 1:
The locking device is nested within the frame tube structure, with the lever arrangement integrated into the available space. The base plate and lever components are positioned to utilize the frame tube's internal volume without requiring large external cutouts, thereby maintaining frame aesthetics and stiffness while enabling secure energy storage device integration.
2Strength
If the electrical energy storage device is inserted from above or below to improve stiffness, then frame stiffness is improved, but the risk of collision with other components increases
Solution Approach 1:
The locking device employs a dynamic lever arrangement that can pivot between locked and unlocked positions. The lever's movement path is carefully designed to clear other frame components during operation, reducing collision risk while maintaining the inserted-from-above-or-below configuration that preserves frame stiffness.
Solution Approach 2:
The locking mechanism utilizes a two-stage pivoting process involving both vertical and horizontal movement dimensions. The lever first pivots vertically to engage/disengage from the energy storage device, then moves horizontally within the frame tube. This multi-dimensional movement path avoids collisions with components in the primary insertion path.
3Reliability
If a conventional locking mechanism with large pivoting range is used, then the locking function is achieved, but handling during removal and reinsertion becomes difficult
Solution Approach 1:
The locking function is segmented into two distinct pivoting stages: a first pivoting process that provides the primary locking action, and a second pivoting process that secures the lever in its final position. This segmentation allows each stage to be optimized for its specific function while collectively achieving reliable locking with minimal total pivoting range for improved handling.
4Ease of operation
If the pivoting range of the lever is reduced to improve handling, then handling radius is reduced, but the locking mechanism complexity increases
Solution Approach 1:
The locking device merges the base plate and lever into a compact integrated assembly that fits within the frame tube. The slotted guide features are incorporated directly into these components, eliminating the need for separate guiding mechanisms. This merging reduces the overall pivoting range required while avoiding excessive complexity through functional integration.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a locking device for fixing an electrical energy accumulator (3) on a frame tube (20) or similar of a two-wheeled vehicle, comprising a lever assembly (40) having a baseplate (41), a lever (42) and a slotted guide (6) between the baseplate (41) and the lever (42), wherein the slotted guide (6) has a first bearing axis (61) and a second bearing axis (62) and a first curved track (63) and a second curved track (64), wherein the lever (42) is designed in such a way that, via the slotted guide (6) and in order to pivot the baseplate (41), the lever (42) executes a first pivot movement exclusively about the first bearing axis (61) and then executes a second pivot movement exclusively about the second bearing axis (62).