Vehicle Drive System Tolerance Compensation Sleeve
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Solution Overview
Problem
Existing drive systems face challenges in mechanical loading and tightness due to gaps between drive units and frame interfaces, which can lead to mechanical loading issues and reduced system efficiency.
Innovation Solution
A drive system design featuring a drive unit positioned between two walls of a frame interface with a connecting wall, utilizing a holding device and a tolerance-compensation element in the form of a sleeve for axial movability and precise positioning, along with damping elements for vibration reduction and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a holding plate is provided on the drive unit to bridge the gap between the drive unit and the wall, then the gap can be bridged, but the mechanical loading and tightness of the drive system are adversely affected
Solution Approach 1:
A tolerance compensation element in the form of a sleeve is introduced as an intermediary component between the drive unit and the frame interface. This sleeve absorbs dimensional deviations and prevents direct transmission of mechanical loads to the drive unit, thereby maintaining both gap bridging capability and system reliability
Solution Approach 2:
The mounting structure is segmented into distinct functional components: a holding device for fixed positioning, a tolerance compensation element for absorbing deviations, and the drive unit. This segmentation allows each component to perform its specific function optimally without compromising the others
2Manufacturing precision
If production-related tolerances and distensions are compensated for, then positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
A single tolerance compensation element in the form of a sleeve serves as a mediator that absorbs multiple sources of dimensional deviation (production tolerances and operational distensions) without requiring multiple separate compensation mechanisms, thus maintaining positioning accuracy while limiting complexity
3Measurement precision
If the tolerance compensation element enables play-free positioning, then positioning precision is improved, but the radial direction constraints increase
Solution Approach 1:
The tolerance compensation element provides different functional characteristics in different directions: it allows axial movement to accommodate thermal expansion and operational distensions, while providing radial constraints to eliminate play and ensure precise positioning. This directional differentiation resolves the contradiction between positioning precision and constraint effects
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 design allows for uncomplicated tolerance compensation, reduced vibration transmission, and enhanced mechanical and acoustic performance, ensuring a robust, efficient, and cost-effective drive system with improved mechanical loading and sealing.
Implementation Method 1
the damping sleeve may prevent or reduce a transmission of vibrations between the first wall and the holding device
Implementation Method 2
The plain bearing bush thus is preferably situated radially inside. This provides a low-friction sliding contact between the holding device and the tolerance compensation element
Data Source
AI summary
A drive system of a vehicle which is operable using muscular energy and/or motor power. The drive system includes a drive unit and a frame interface, the drive unit being at least partially situated between a first wall and a second wall of the frame interface. The drive system further includes a holding device, which holds the drive unit on each of the two walls, the holding device being fixed in place on the second wall; and a tolerance compensation element. The first wall has a first wall opening. The tolerance compensation element is developed in the form of a sleeve and is situated inside the first wall opening. A part of the holding device is disposed inside the tolerance compensation element in an axially movable manner.