Yarn tensioning device in covering machine
By designing a yarn tensioning device on the covering machine and using a flipping rod and cam to adjust the pretension, the problem of unstable yarn tension is solved, ensuring stable yarn tension and improving the elasticity of synthetic fiber yarns and product quality.
Patent Information
- Application Number
- CN202411192124.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-01-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The yarn tension in the coating area of existing coating machines is unstable, which affects the elasticity of synthetic fiber filaments and product quality.
Design a yarn tensioning device for a covering machine, including a fixed base, a shaft, a cam, a flipping rod, and an elastic element. The preload is adjusted by flipping the flipping rod and changing the outer diameter of the cam to adapt to the tension changes required by the rotation of the spindle and maintain stable yarn tension.
This achieves relatively stable yarn tension within the coating area, ensuring consistent elasticity of the synthetic fiber filaments and improving product quality.
Smart Images
Figure CN119284651A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a covering machine, in particular to a yarn tensioning device in the covering machine. Background Art
[0002] The coating machine has a plurality of rod-shaped positioning rods, and the spindle includes a cylindrical storage tube and yarn wound on the outside of the storage tube. After the storage tube of the spindle is sleeved on the positioning rod, the spindle can be stably axially fixed to the coating machine. When the yarn is subjected to corresponding processing operations, the yarn is stably pulled out from the storage tube and enters the corresponding processing step. In order to prevent the yarn output from the spindle from being loose, it is usually necessary to set a tensioning device for tensioning the yarn on the frame of the coating machine.
[0003] Once the pre-tensioning force of the tensioning device is set, the tensioning effect it produces on the yarn is fixed. The yarn tension in the covering operation area is determined by the tensioning device and the pulling force required to pull the spindle to rotate.
[0004] As the yarn on the spindle is continuously consumed, the overall weight of the spindle will decrease, which will cause the rotational friction relative to the positioning rod to decrease, and the pulling force required to pull the spindle to rotate will gradually decrease.
[0005] Therefore, the yarn tension in the coating operation area of the existing coating machine is not relatively stable, which will result in that the elastic properties of the synthetic fiber filaments formed after the yarn coating process cannot be guaranteed to be uniform, thereby affecting the quality of the product. Summary of the invention
[0006] The invention provides a yarn tensioning device in a covering machine, which solves the problem in the prior art that the yarn tension in a covering operation area of the covering machine is not relatively stable.
[0007] The above technical problems of the present invention are mainly solved by the following technical solutions: a yarn tensioning device in a covering machine, comprising a fixed seat, a shaft body fixed on the fixed seat, a cam fixed on the shaft body, a flip rod rotatably connected to the shaft body, and an elastic member driving the flip rod to flip and reset to one side, the flip rod is slidably matched with a slider, one end of the slider abuts against the outer wall of the cam, the other end of the slider is provided with a preload, the preload is provided with a movable abutment, the end of the flip rod is provided with a fixed abutment, the movable abutment abuts against the fixed abutment in real time under the action of the preload, and the end of the flip rod is also provided with a threading hole; when the elastic member drives the flip rod to reset and rotate, the outer diameter of the cam is set to increase gradually.
[0008] The use of the present invention is as follows: the yarn is passed through the threading hole and through the abutment portion between the fixed abutment and the movable abutment; after the coating machine is started, the yarn will continuously flow through the present invention, and when the pulling force required to pull the spindle to rotate becomes larger, the yarn will pull the flip rod to flip, and when the flip rod flips, the elastic member will be compressed, and at the same time, the abutment portion between the slider and the outer wall of the cam will also move, and the outer diameter of the cam will gradually decrease, so the pressure of the preload member will decrease, and eventually the pressure of the abutment portion between the fixed abutment and the movable abutment will decrease, and the friction force on the yarn will decrease, which means that the actual preload effect of the present invention will weaken; when the pulling force required to pull the spindle to rotate becomes smaller, the elastic member will drive the flip rod to rotate in the opposite direction, and then the pressure of the abutment portion between the fixed abutment and the movable abutment will increase, and the friction force on the yarn will increase, which means that the actual preload effect of the present invention will be enhanced. In summary, the actual preload effect of the present invention can change according to the change of the pulling force value required to pull the spindle to rotate, so that the yarn tension in the coating operation area is relatively stable.
[0009] Therefore, compared with the prior art, the present invention has the following characteristics: 1. When the pulling force required to pull the spindle to rotate becomes larger, the yarn will pull the flip rod to flip, which will eventually cause the actual pre-tightening effect of the present invention to weaken; when the pulling force required to pull the spindle to rotate becomes smaller, the elastic part will drive the flip rod to rotate in the opposite direction, which will eventually cause the actual pre-tightening effect of the present invention to be enhanced, so that the yarn tension in the covering operation area is relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Attached Figure 1 is a schematic diagram of the structure of the present invention when the yarn tension is relatively small;
[0011] Attached Figure 2 is a schematic diagram of the structure of the present invention when the yarn tension is relatively large;
[0012] Attached Figure 3 is a perspective view of the present invention;
[0013] Attached Figure 4 is a top view of the present invention;
[0014] Attached Figure 5 It is a schematic diagram of the internal structure of the present invention. DETAILED DESCRIPTION
[0015] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.
[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0017] Example 1: See Figure 1 , Figure 2 , Figure 3 and Figure 4 A yarn tensioning device in a covering machine comprises a fixed seat 100, a shaft 110 fixed on the fixed seat, a cam 200 fixed on the shaft, a flip rod 300 rotatably connected to the shaft, and an elastic member 400 for driving the flip rod to flip and reset to one side, wherein the elastic member is specifically a torsion spring, a slider 500 is slidably matched on the flip rod, one end of the slider abuts against the outer wall of the cam, a preload member 600 is provided on the other end of the slider, a movable abutment 700 is provided on the preload member, a fixed abutment is provided at the end of the flip rod, and the movable abutment abuts against the fixed abutment in real time under the action of the preload member, and a threading hole 310 is also provided at the end of the flip rod; when the elastic member drives the flip rod to reset and rotate, the outer diameter of the cam is set to increase gradually.
[0018] The use of this embodiment is as follows: the yarn is passed through the threading hole and through the abutment portion between the fixed abutment and the movable abutment; after the coating machine is started, the yarn will continuously flow through this embodiment, and when the pulling force required to pull the spindle to rotate becomes larger, the yarn will pull the flip rod to flip, and when the flip rod flips, the elastic member will be compressed, and at the same time, the abutment portion between the slider and the outer wall of the cam will also move, and the outer diameter of the cam will gradually decrease, so the pressure of the preload member will decrease, and eventually the pressure at the abutment portion between the fixed abutment and the movable abutment will decrease, and the friction force on the yarn will decrease, which means that the actual preload effect of this embodiment will weaken; when the pulling force required to pull the spindle to rotate becomes smaller, the elastic member will drive the flip rod to rotate in the opposite direction, which will increase the pressure at the abutment portion between the fixed abutment and the movable abutment, and the friction force on the yarn will increase, which means that the actual preload effect of this embodiment will be enhanced. In summary, the actual preload effect of this embodiment can change according to the change in the pulling force required to pull the spindle to rotate, so that the yarn tension in the coating operation area is relatively stable.
[0019] See Figure 4A mounting plate 320 is fixed to the end of the flip rod, and the fixed abutment member includes two optical axes 330 fixed to the mounting plate in parallel and at intervals. The head of the movable abutment member is tangent to the two optical axes at the same time, and the head of the movable abutment member is a smooth surface.
[0020] See Figure 5 The tail of the movable abutment member is extended with a plug rod 710, the slider is provided with a plug hole 510 that forms a plug-in fit with the plug rod, and the preload member is sleeved on the plug rod.
[0021] See Figure 5 The end of the slider is rotatably matched with a roller 520, and the roller and the cam are rolled and fitted, which can reduce the friction resistance generated when the flip rod rotates.
[0022] See Figure 1 An extension portion 340 is provided on the flip rod at the other end relative to the shaft body. When the elastic member drives the flip rod to return and rotate, the extension portion can abut against the fixing seat to limit the position.
[0023] See Figure 1 The flip rod is provided with two pieces and is completely mirrored. The flip rod is provided with a first slide groove 350 and a second slide groove 360. The slider is provided with a first slide bar 530 and a second slide bar 540. The first slide bar is slidably assembled in the first slide groove, and the second slide bar is slidably assembled in the second slide groove.
[0024] The present invention can be modified in various ways which are obvious to those skilled in the art, and such modifications are not considered to depart from the scope of the present invention. All such modifications which are obvious to those skilled in the art are intended to be included within the scope of the present claims.
Claims
1. A yarn tensioning device in a covering machine, characterized in that: The invention comprises a fixed seat, a shaft body fixed on the fixed seat, a cam fixed on the shaft body, a flip rod rotatably connected to the shaft body, and an elastic member driving the flip rod to flip and reset to one side, the flip rod is slidably matched with a slider, one end of the slider abuts against the outer wall of the cam, the other end of the slider is provided with a preload, the preload is provided with a movable abutment, the end of the flip rod is provided with a fixed abutment, the movable abutment abuts against the fixed abutment in real time under the action of the preload, and the end of the flip rod is also provided with a threading hole; when the elastic member drives the flip rod to reset and rotate, the outer diameter of the cam is set to increase gradually.
2. The yarn tensioning device in the covering machine according to claim 1, characterized in that: A mounting plate is fixed to the end of the flip rod, the fixed abutment member comprises two optical axes fixed to the mounting plate in parallel and at intervals, the head of the movable abutment member is tangent to the two optical axes at the same time, and the head of the movable abutment member is a smooth surface.
3. The yarn tensioning device in the covering machine according to claim 2, characterized in that: The tail of the movable abutment member is extended with a plug rod, the sliding block is provided with a plug hole which is plugged and matched with the plug rod, and the pre-tightening member is sleeved on the plug rod.
4. The yarn tensioning device in the covering machine according to claim 3, characterized in that: The end of the sliding block is rotatably matched with a roller, and the roller is in rolling contact with the cam.
5. The yarn tensioning device in the covering machine according to claim 1, characterized in that: An extension portion is provided on the flip rod relative to the other end of the shaft body. When the elastic member drives the flip rod to return and rotate, the extension portion can abut against the fixing seat to limit position.
6. The yarn tensioning device in the covering machine according to claim 1, characterized in that: The flip rod is provided with two pieces and is completely mirrored. The flip rod is provided with a first slide groove and a second slide groove. The slider is provided with a first slide rod and a second slide rod. The first slide rod is slidably assembled in the first slide groove, and the second slide rod is slidably assembled in the second slide groove.