Spindle Drive Damping Structure for Vibration Isolation and Wear Control
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Solution Overview
Problem
Existing spindle drives experience premature wear of damping materials due to uncontrolled deformation under tensile loads, leading to vibration transmission and noise disturbances, particularly when used with adjustment elements like flaps subjected to manual pulling loads.
Innovation Solution
Incorporating a coaxial recess with a radially circumferential groove and a radially projecting flange in the connecting part, with gaps between the flange and groove walls to limit damping material deformation, and using different elasticity damping materials for varying loads, along with additional gaps to enhance damping capacity and prevent buckling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If damping material is permanently arranged in a damping box with a neck section projecting into it, then vibrations are isolated and transmitted to the adjusting element are prevented, but the damping material deforms without limitation under tensile loads leading to fatigue and premature wear
Solution Approach 1:
The patent introduces geometric parameters (groove depth, flange position, gap dimensions) that control the deformation behavior of the damping material. These parameters limit the tensile deformation to a controlled amount while maintaining vibration isolation capability, preventing fatigue failure.
Solution Approach 2:
The groove and flange structure acts as an intermediary mechanism between the unlimited tensile load and the damping material. It provides a mechanical stop that limits deformation before the damping material can be damaged, while still allowing sufficient movement for vibration damping.
2Object-affected harmful factors
If the damping element is allowed to deform freely under load, then vibration damping capacity is maximized, but the damping material experiences uncontrolled deformation leading to fatigue and premature wear
Solution Approach 1:
The patent optimizes the geometric parameters of the groove and flange to achieve a balance between damping capacity and deformation limitation. The groove depth and flange position are specifically designed to provide adequate damping while preventing excessive deformation that would cause fatigue.
3Ease of manufacture
If the connecting part is designed with a simple structure, then manufacturing and assembly are simplified, but vibration isolation and deformation control are insufficient
Solution Approach 1:
The connecting part is segmented into functional zones: the groove region for damping material placement, the flange region for deformation limitation, and the connection region for structural integration. This segmentation allows each zone to perform its specific function while maintaining overall manufacturing simplicity.
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
Effectively isolates vibrations, prevents noise disturbances, and extends the service life of the spindle drive by minimizing damping material fatigue and deformation under both tensile and compressive loads, while allowing for reduced size and production simplicity.
Implementation Method 1
the damping element isolates the vibrations generated during the operation of the spindle drive and prevents them from being transmitted to the adjusting element
Implementation Method 2
a damping element (20) made of an elastic damping material (15)
Implementation Method 3
Deformation of the damping element under both tensile and compressive loads is limited by the gap between the side walls of the flange of the connection and the side walls of the groove of the connecting part
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a spindle drive for the motorized adjustment of an adjusting element of a motor vehicle, comprising a tubular or semi-shell-shaped spindle drive housing 1, in one end of which an annular or disc-shaped connecting part 4 is inserted and fastened. This connecting part is connected via a damping element 20 made of an elastic damping material 15, 15' to a connection 10 for dissipating axial drive movements. The connecting part 4 has a coaxial recess 7, which has a radially circumferential groove 8 in its inner radially circumferential wall. The connection 10 projects axially into the recess 7 of the connecting part (4) with its end region facing the spindle drive housing 1 and has a radially circumferential flange 12 projecting into the groove 8. A gap 13, 14 is provided between the side walls of the groove 8 and the side walls of the flange 12, in which the damping element 20 is arranged.