Device for controlling the movement of the needles of a needle loom, in particular an elliptic needle loom, and needle loom comprising such a device
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Solution Overview
Problem
Existing elliptical needling machines have complex and space-consuming drive mechanisms for imparting elliptical movement to needles, which complicates their structure and makes it difficult to integrate them into a sealed casing alongside longitudinal drive means.
Innovation Solution
A simplified drive system that eliminates the need for phase shift between eccentric shafts, comprising longitudinal and transverse drive means housed in a sealed casing, allowing for a more compact and less complex mechanical structure that can be adjusted, enabling efficient elliptical or rectilinear motion control for needle boards and needles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex drive means are used to impart elliptical movement to needles, then the elliptical motion control is achieved, but the device structure becomes complex and space-consuming
Solution Approach 1:
The patent combines the longitudinal drive means and transverse drive means into a single integrated drive system housed within one sealed casing. The longitudinal drive means imparts back-and-forth movement while the transverse drive means superimposes lateral displacement, together producing elliptical needle motion. This merging eliminates the need for separate complex elliptical mechanisms while achieving precise elliptical motion control.
Solution Approach 2:
The drive system is designed to perform multiple functions: the longitudinal drive means provides primary reciprocating motion, the transverse drive means adds lateral displacement, and together they generate elliptical trajectories. The same integrated system can also produce rectilinear motion by adjusting the transverse drive component, making the system versatile for different needle motion requirements.
2Manufacturing precision
If traditional drive means are used for elliptical motion, then motion control is achieved, but the device takes up a lot of space
Solution Approach 1:
The patent houses both the longitudinal drive means and transverse drive means within a single sealed casing, nesting multiple drive functions in a compact configuration. The longitudinal drive means and transverse drive means are arranged to share space efficiently, with the transverse drive means positioned to superimpose its motion on the longitudinal reciprocating motion, achieving compact elliptical motion generation.
3Manufacturing precision
If complex drive means are used, then elliptical motion is achieved, but integration into sealed casing becomes difficult
Solution Approach 1:
The patent integrates both longitudinal and transverse drive means within a single sealed casing, merging previously separate functions into one manufacturable unit. The casing is designed to enclose both drive mechanisms, allowing them to be manufactured and assembled as an integrated system, simplifying installation and maintenance while achieving precise elliptical motion control.
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 solution provides a more compact and less complex drive system that allows for efficient elliptical or rectilinear motion control, reducing the need for phase shift between eccentric shafts and enabling easier integration into a sealed casing, enhancing the mechanical simplicity and efficiency of the needling machine.
Implementation Method 1
first longitudinal drive means configured to impart a reciprocating movement to the column in a direction parallel to the longitudinal axis
Implementation Method 2
second transverse drive means configured to impart a back and forth movement in a direction MD to the column
Data Source
Figure 1
Figure 1A
Figure 2
AI summary
A control device for the component of displacement along a trajectory of the needles of a needle-punching machine intended to consolidate by needle-punching a web or sheet of fibers, in particular non-woven fabric, characterized in that it comprises: a drive link (27) adapted to be coupled to the needles and/or to the needle board and/or to an element fixed to the board or the needles to impart to them a reciprocating motion in a direction, an eccentric shaft (21) and a connecting rod (22), the eccentric shaft driving the connecting rod in rotation about an axis of rotation, in particular extending in the direction perpendicular to the direction and to the vertical direction, and the connecting rod (22) being connected to the link (27) by means of an element (23) forming an intermediate lever pivoting about an axis (24) of pivoting, in particular parallel to the axis of rotation of the eccentric shaft, the lever being articulated on one side to the connecting rod,in particular along an axis parallel to and at a distance from the pivot axis, and on the other hand to the drive link, in particular at a point at a distance from the pivot axis, to impart to the latter the back-and-forth movement along the direction.