Drive Assembly with L-Shaped Frame Interface for Horizontal Mounting
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Solution Overview
Problem
Existing drive assemblies for vehicles, such as electric bicycles, face mechanical stress and tightness issues due to gaps between the drive unit and the frame, which can lead to adverse effects on the assembly's stability and durability.
Innovation Solution
A drive assembly with an L-shaped frame interface that allows horizontal mounting of the drive unit, providing a stable and adjustable stress condition through a pot-shaped design and elastically deformable holding elements, ensuring even stress distribution and secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive unit is mounted vertically into a U-shaped frame interface using sheet metal holding pieces, then the drive unit can be secured to the frame, but mechanical stress and tightness are adversely affected due to gaps between the drive unit and the frame wall
Solution Approach 1:
The invention transitions from vertical mounting to horizontal mounting of the drive unit. The frame interface is redesigned with a base and lateral wall forming an L-shape, allowing the drive unit to be inserted horizontally along the bottom bracket axle direction. This dimensional change eliminates the need for gap-bridging deformation and enables direct, stable contact between the drive unit and the frame interface, resolving the mechanical stress and tightness issues.
Solution Approach 2:
The invention inverts the conventional mounting approach by changing the orientation from vertical to horizontal. Instead of inserting the drive unit from top to bottom or bottom to top, the drive unit is now inserted from the side in a horizontal direction. This inversion fundamentally changes the stress distribution and eliminates the adverse effects of gap deformation on mechanical integrity.
2Stability of the object's composition
If sheet metal holding pieces are deformed to bridge gaps between the drive unit and the frame wall, then the gap is closed, but the mechanical stress and tightness of the drive assembly are adversely affected
Solution Approach 1:
The invention eliminates the need for deforming holding pieces by changing the mounting orientation to horizontal. The L-shaped frame interface with base and lateral wall is designed to accommodate the drive unit horizontally, allowing direct contact and stable positioning without requiring deformation of sheet metal components to bridge gaps.
3Reliability
If the drive unit is inserted vertically into the frame interface, then the drive unit can be secured, but the assembly process becomes more complex and less accessible
Solution Approach 1:
The invention changes the mounting direction from vertical to horizontal, allowing the drive unit to be inserted along the bottom bracket axle direction. This horizontal insertion provides significantly better accessibility for tools and operators during assembly, while the L-shaped frame interface with base and lateral wall ensures secure attachment through direct contact and stable positioning.
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
The L-shaped frame interface and deformable holding elements enable a robust, lightweight, and cost-effective drive assembly with improved mechanical protection and stress distribution, enhancing the assembly's stability and reliability.
Implementation Method 1
elastically deformable holding elements, ensuring even stress distribution
Data Source
AI summary
A drive assembly is for a vehicle that is operated using muscle power and/or a motor. The drive assembly includes a drive unit and an L-shaped frame interface having a base, a lateral wall, and an open face lying opposite the base. The drive unit is installed by way of the open face, in particular horizontally, and is releasably secured to the base.