Sewing Machine Winding Device Damping Element Braking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing sewing machine winding devices face high component loading during braking, leading to a reduced service life due to the high force required to maintain a defined circumferential position for reproducible thread winding.
Innovation Solution
Incorporating a damping element that increases the braking distance by engaging via a resilient material, such as polyurethane, to reduce the force load on components and enhance the service life of the winding device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the engaging body directly engages the winding device to brake it at the end of the winding process, then the circumferential position is defined accurately for reproducible thread winding, but the force load on the components increases significantly reducing service life
Solution Approach 1:
A damping element is introduced as an intermediary between the engaging body and the winding device. This damping element absorbs the shock and reduces the peak forces during engagement while still allowing the engaging body to accurately position the winding device circumferentially. The damping element acts as a mediator that transmits the positioning function while filtering out the harmful force spikes.
Solution Approach 2:
The damping element is pre-installed between the engaging body and the winding device to cushion the upcoming impact before engagement occurs. This beforehand cushioning prepares the system to absorb the braking forces, preventing sudden force spikes that would otherwise damage the components during the engagement process.
2Productivity
If braking force is increased to stop the winding device quickly, then the winding process efficiency is maintained, but the component loading increases leading to reduced service life
Solution Approach 1:
The damping element converts the harmful high-impact braking force into a beneficial controlled deceleration process. By allowing the damping element to compress and dissipate energy, the system transforms what would be a damaging shock load into a controlled energy absorption process that still achieves the required stopping function while protecting components.
Solution Approach 2:
The damping element changes the temporal parameters of the braking process by extending the braking distance and time. Instead of instantaneous high-force braking, the damping element creates a progressive force application that maintains productivity while reducing peak loads on components, effectively changing the force-time profile of the braking event.
3Duration of action of stationary object
If a damping element is introduced to reduce force load, then the service life of the winding device is increased, but the device complexity increases
Solution Approach 1:
The damping element is implemented as a flexible component that can be integrated into the existing winding device structure. This flexible element provides the necessary damping function without requiring complex mechanical assemblies, maintaining relative simplicity while achieving the goal of extended service life through reduced component loading.
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 damping element significantly reduces the force load on components during braking, thereby increasing the service life of the winding device and allowing for automatic braking triggered by the wound coil's predetermined diameter.
Implementation Method 1
the engaging body (14) is engaged via a damping element (17) 12. The damping element (17) leads to an increased braking distance when stopping the rotation of the winding device (8). This braking distance leads to a considerable reduction in the force load on the components involved when braking the winding device (8).
Implementation Method 2
A resilient element according to claims 5 and 6 enables the winding device to have a particularly long service life. A resilient element according to claim 7 can in particular be made of polyurethane.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The sewing machine has a stand and an arm with an arm shaft which stands in drive connection with a needle bar. A flushing device (8) is provided for rolling-up a coil by a thread reel. The flushing device has a friction wheel (12) which is drivable from the arm shaft. An engaging body (14) is attached to a receiving body by a damping element (17) in elastically cushioned manner. The damping element is manufactured from an elastomer, an elastomer foam, or rubber. The damping element is formed as spring element made of metal or plastic.