Yarn pressing device with double pressing wheels
By adopting a dual-pressure wheel structure in the APR automatic weft extraction device, the wire contact during weft extraction is achieved, which solves the problem that the weft yarn cannot be pressed due to the single-pressure wheel structure, and improves the success rate of the pullback and the production efficiency of the loom.
Patent Information
- Application Number
- CN202420874234.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The single-pressure wheel structure in the existing APR automatic weft extraction device has the problem that the weft yarn cannot be pressed, which affects the success rate of weft yarn retraction, and improving the processing accuracy of parts will increase costs.
The dual-pressure wheel structure is adopted, through the connection between the cylinder assembly and the lower support wheel, the linear contact between the dual-pressure wheel and the lower support wheel during weft retraction is achieved, increasing the contact area and ensuring constant weft tension.
The success rate of weft yarn extraction is improved, the production efficiency of the loom is enhanced, and the constant tension of the weft yarn is ensured.
Smart Images
Figure CN222631696U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of textile machinery, in particular to a double-pressure wheel yarn pressing device. Background Art
[0002] The textile machinery is equipped with an APR automatic weft drawing device. The role and function of this device is that when short weft or long weft appears during the weaving process of the loom, the faulty weft yarn can be drawn back to the original position through this device, realizing the function of automatically starting the loom in an unmanned state. The configuration of this device can greatly improve the weaving efficiency of the loom and reduce the labor cost of the textile factory. The yarn pressing wheel in the existing APR automatic weft drawing device is a single pressing wheel structure.
[0003] During the weaving process of the loom, if the weft yarn is short or long, during the weft yarn retraction process, the yarn pressing wheel will be pressed down on the tug wheel by the action of the cylinder to press the weft yarn to ensure that the weft yarn has a certain tension to achieve successful weft yarn retraction. However, the existing single pressure wheel structure has certain defects. The reason is that the weft yarn is in point contact with the yarn pressing wheel and the lower support wheel. If the roundness of the parts of the yarn pressing wheel and the lower support wheel is not enough, or after a long time, the yarn pressing wheel and the lower support wheel are worn out of grooves by the weft yarn, the weft yarn will not be pressed, thereby affecting the success rate of weft yarn retraction; if the processing accuracy of the parts of the yarn pressing wheel and the lower support wheel is improved, the parts processing cost will increase. Utility Model Content
[0004] The utility model aims to provide a double-pressure wheel yarn pressing device, which has a simple and reasonable structure, and the contact mode between the pressure wheel and the lower supporting wheel is line contact, which ensures the constant tension of the weft yarn and improves the success rate of the weft yarn withdrawal.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a double-pressure wheel yarn pressing device, whose structure includes a cylinder assembly and a lower supporting wheel, and the cylinder assembly and the lower supporting wheel are respectively connected to the APR automatic weft drawing mechanism; it also includes a double pressure wheel structure, and the double pressure wheel structure is arranged on the upper part of the lower supporting wheel. The double pressure wheel structure includes a pressure wheel bracket and a pressure wheel assembly, the top wall of the pressure wheel bracket is connected to the telescopic end of the cylinder assembly, and a pressure wheel assembly is respectively provided on both sides of the lower part of the pressure wheel bracket.
[0006] Furthermore, the pressure wheel bracket is in an inverted U shape, and pressure wheel assembly mounting holes are respectively provided on two sides of the inverted U-shaped pressure wheel bracket.
[0007] Furthermore, the pressure wheel assembly includes a bearing member, a core shaft, a pressure wheel and a locking screw. The core shaft is cooperatively connected with the mounting hole of the pressure wheel bracket. The two ends of the core shaft are respectively fixed by locking screws. The bearing member is sleeved on the core shaft, and the pressure wheel is sleeved with the bearing member.
[0008] Furthermore, the bearing component includes two needle roller bearings and a bearing spacer sleeve, the bearing spacer sleeve is arranged between the two needle roller bearings, and the needle roller bearings and the bearing spacer sleeve are both sleeved on the core shaft.
[0009] Furthermore, one end of the set screw passes through the threaded hole on the side wall of the pressure wheel bracket and tightly abuts against the side wall of the core shaft.
[0010] Furthermore, the cylinder assembly includes a cylinder and a cylinder push rod, one end of the cylinder push rod is telescopically connected to the cylinder, and the other end of the cylinder push rod is fixedly connected to the top wall of the double pressure wheel structure.
[0011] Beneficial effects of the utility model:
[0012] The utility model arranges a double pressure wheel structure at the telescopic end of the cylinder, so that the contact mode between the double pressure wheel structure and the lower supporting wheel is line contact when the weft yarn is withdrawn, and the two pressure wheels simultaneously press the weft yarn at different positions, thereby increasing the contact area between the weft yarn and the lower supporting wheel, ensuring the constant tension of the weft yarn, greatly improving the success rate of weft yarn withdrawal, and improving the production efficiency of the loom.
[0013] Since the two pressing wheels of the lower supporting wheel and the double pressing wheel structure rotate in opposite directions during the weft drawing process, the weft yarn is always clamped, a constant tension is given to the weft yarn, the weft yarn is constrained, and the success rate of weft drawing is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the installation structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the double pressure wheel structure in the utility model;
[0016] Figure 3 This is a schematic diagram of the working state structure of the utility model;
[0017] In the figure:
[0018] 1 double pressure wheel structure, 2 lower supporting wheel, 3 cylinder, 4 cylinder push rod, 5 pressure wheel bracket, 6 pressure wheel, 7 needle roller bearing, 8 bearing spacer, 9 core shaft, 10 set screw, 11 weft yarn. DETAILED DESCRIPTION
[0019] A double-pressure wheel yarn pressing device of the utility model is described in detail below with reference to the accompanying drawings of the specification.
[0020] like Figures 1 to 3As shown, a double-pressure-wheel yarn pressing device proposed in the utility model includes a cylinder assembly and a lower supporting wheel, and the cylinder assembly and the lower supporting wheel are respectively connected to the relevant components of the APR automatic weft drawing mechanism. The yarn pressing device also includes a double-pressure-wheel structure 1, and the double-pressure-wheel structure 1 is arranged on the upper part of the lower supporting wheel 2. The double-pressure-wheel structure 1 includes a pressure wheel bracket 5 and a pressure wheel assembly. The top wall of the pressure wheel bracket 5 is connected to the telescopic end of the cylinder assembly, and a pressure wheel assembly is respectively arranged on both sides of the lower part of the pressure wheel bracket 5. The cylinder assembly includes a cylinder 3 and a cylinder push rod 4, one end of the cylinder push rod 4 is telescopically connected to the cylinder 3, and the other end of the cylinder push rod 4 is fixedly connected to the top wall of the pressure wheel bracket 5 of the double-pressure-wheel structure 1. The telescopic movement of the cylinder push rod 4 drives the double-pressure-wheel structure 1 to move up and down, so as to realize the separation or bonding state of the double-pressure-wheel structure 1 and the lower supporting wheel 2.
[0021] The pressure roller bracket 5 is in an inverted U-shape, and the two sides of the inverted U-shaped pressure roller bracket 5 are respectively provided with pressure roller assembly mounting holes. The pressure roller assembly includes a bearing component, a core shaft 9, a pressure roller 6 and a set screw 10. The core shaft 9 is connected with the mounting hole of the pressure roller bracket 5. The two ends of the core shaft 9 are respectively fixed by set screws 10. The bearing component is sleeved on the core shaft 9, and the pressure roller 6 is sleeved with the bearing component. The bearing component includes two needle bearings 7 and a bearing spacer 8. The bearing spacer 8 is arranged between the two needle bearings 7. The needle bearings 7 and the bearing spacer 8 are both sleeved with the core shaft 9. One end of the set screw 10 passes through the threaded hole on the side wall of the pressure roller bracket 5 and is tightly against the side wall of the core shaft 9, so that the core shaft is fixed by the set screw.
[0022] like Figure 1 As shown, when the weft yarn 11 of the loom is inserted normally, the double pressure wheel structure 1 and the lower supporting wheel 2 remain in a separated state.
[0023] like Figure 3 As shown, when the weft yarn 11 of the loom has short or long wefts, the sensor will transmit the signal to the electrical control system, and the loom will stop. The electronic control system issues an action command based on the received signal analysis. At this time, the cylinder 3 receives the signal command and takes action. The cylinder push rod 4 drives the double pressure wheel structure 1 to move downward. The two pressure wheels 6 in the double pressure wheel structure 1 simultaneously fit on the arc surface of the lower supporting wheel 2 to press the weft yarn 11. At this time, the weft yarn 11 fits on the local arc surface of the lower supporting wheel 2 and the two pressure wheels 6 respectively, forming an S-shaped line contact. The APR automatic weft drawing device draws the weft yarn 11 back to its original position under the action of the mechatronic system, and the loom automatically starts to complete the weft drawing work.
[0024] The lower support wheel 2 and the two pressure wheels 6 rotate in opposite directions during the weft drawing process to clamp the weft yarn 11 all the time, give the weft yarn 11 a constant tension, constrain the weft yarn 11, and ensure the success rate of weft drawing.
[0025] The double-pressure-wheel yarn pressing device of the utility model realizes that the contact mode between the weft yarn and the pressure wheel and the lower supporting wheel is line contact when the weft yarn is withdrawn, thereby ensuring constant weft yarn tension, greatly improving the weft yarn withdrawal success rate, and improving the production efficiency of the loom.
[0026] The above description is only used to illustrate some principles of the utility model. This specification is not intended to limit the utility model to the specific structure and application scope shown and described. Therefore, all corresponding modifications and equivalents that may be used belong to the patent scope applied for the utility model.
[0027] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art.
Claims
1. A double-pressure wheel yarn pressing device, comprising a cylinder assembly and a lower supporting wheel, wherein the cylinder assembly and the lower supporting wheel are respectively connected to an APR automatic weft drawing mechanism, wherein: It also includes a double pressure wheel structure, which is arranged on the upper part of the lower supporting wheel. The double pressure wheel structure includes a pressure wheel bracket and a pressure wheel assembly. The top wall of the pressure wheel bracket is connected to the telescopic end of the cylinder assembly, and a pressure wheel assembly is respectively provided on both sides of the lower part of the pressure wheel bracket.
2. A double-pressing-wheel yarn pressing device according to claim 1, characterized in that: The pressure wheel bracket is in an inverted U shape, and pressure wheel assembly mounting holes are respectively provided on two sides of the inverted U-shaped pressure wheel bracket.
3. A double-pressing-wheel yarn pressing device according to claim 1 or 2, characterized in that: The pressure wheel assembly includes a bearing, a core shaft, a pressure wheel and a set screw. The core shaft is matched and connected with the mounting hole of the pressure wheel bracket. The two ends of the core shaft are respectively fixed by set screws. The bearing is sleeved on the core shaft, and the pressure wheel is sleeved with the bearing.
4. A double-pressing-wheel yarn pressing device according to claim 3, characterized in that: The bearing component comprises two needle roller bearings and a bearing spacer sleeve, wherein the bearing spacer sleeve is arranged between the two needle roller bearings, and the needle roller bearings and the bearing spacer sleeve are both sleeved on the core shaft.
5. A double-pressing-wheel yarn pressing device according to claim 3, characterized in that: One end of the set screw passes through the threaded hole of the side wall of the pressure wheel bracket and is tightly against the side wall of the core shaft.
6. A double-pressing-wheel yarn pressing device according to claim 1, characterized in that: The cylinder assembly comprises a cylinder and a cylinder push rod, one end of the cylinder push rod is telescopically connected to the cylinder, and the other end of the cylinder push rod is fixedly connected to the top wall of the double pressure wheel structure.