Tension stabilizing device for center traction

By designing a tension stabilization device for central traction, the rotation speed of the central traction wheel is adjusted by using the tension swing rod and elastic members, the steel cord quality problem caused by the instability of the existing central traction device is solved, and the tension stability of the jointing equipment is improved.

CN222922681UActive Publication Date: 2025-05-30ZHANGJIAGANG JUNMA STEEL CORD CO LTD
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Patent Information

Application Number
CN202421682452.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-16
Publication Date
2025-05-30
Estimated Expiration
2034-07-16

AI Technical Summary

Technical Problem

The existing central traction device is unstable during the operation of the equipment, which causes the steel cord to be loose when shut down or started, resulting in quality defects and difficulty in commissioning.

Method used

A tension stabilization device for central traction is designed, including a machine base, a central traction wheel, a first pass wheel, a friction disc and a tension swing rod. The tension swing rod passes through the second pass wheel and the tension friction belt to adjust the rotation speed of the central traction wheel, and combines the pre-tension force of the elastic member to ensure that the steel cord is stable during operation, speed reduction or shutdown.

Benefits of technology

By reducing the rotation speed of the central traction wheel, the traction speed of the steel cord is stabilized, and the cord is avoided loosening, the tension stability of the shaping equipment is improved, and the quality problems caused by loosening and tightening are solved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a tension stabilizing device for center traction, which comprises a machine base, a center traction wheel and a tension swing rod, the tension swing rod is rotatably installed on the machine base through a rotating shaft, and the tension swing rod comprises a first force arm and a second force arm which are distributed on the two sides of the rotating shaft. The tension friction belt with pre-friction force on the friction disc is installed on the first force arm, when the speed of the steel wire cord is increased, the tension of the steel wire cord on the second cord passing wheel is increased, the friction force between the tension friction belt and the friction disc is driven to be increased, then the rotating speed of the center traction wheel is reduced, and the effect of reducing the traction speed of the steel wire cord is achieved. A spring with pretension force is installed on the second force arm, so that the second wire passing wheel on the first force arm has certain pretension force on the steel wire cords, the steel wire cords are prevented from loosening from the second wire passing wheel during speed reduction or shutdown, the tension stability of stranding equipment is improved, and the quality problem caused by loosening and tightening of the steel wire cords is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of steel cord production, and particularly relates to a tension stabilizing device for central traction. Background Art

[0002] The steel cord stranding equipment is a stranding equipment with a multi-layer structure formed at one time. The equipment is divided into two sections of stranding devices. The front section strands the outer single wires of the product, and the rear section strands the core wire single wires of the product. During production, after the core wire is stranded into a strand by the rear section stranding equipment, it is centrally tractioned through the middle to the front section, and is stranded into finished steel cord with the front surface wire single wires at the same time.

[0003] Since the central traction is only a simple tension damper, specifically two traction wheels and a tension belt, the tension belt is wound around the outer side of the friction disc of one of the traction wheels, so that the central traction wheel has a certain resistance, but it is not stable. Especially when the equipment stops, the cord between the rear wire pay-off and the central traction will become loose. When starting again, the looseness and tightness will cause quality defects such as cord small particles. Since the central traction is inside the equipment, it cannot be controlled during operation. Only the pre-tension of the tension belt can be adjusted. Once the pre-tension is small, the cord is likely to become loose, and if the pre-tension is large, the cord will be pulled off, resulting in great difficulty in debugging. Summary of the Utility Model

[0004] The utility model provides a tension stabilizing device for central traction, comprising:

[0005] A machine base, which is arranged in the steel cord stranding equipment and is located between the front section stranding equipment and the rear section stranding equipment;

[0006] A central traction wheel, which is installed on the machine base and is used to traction the cord of the rear section stranding equipment into the front section stranding equipment;

[0007] A first wire passing wheel, which is rotatably installed on the machine base and is used for conducting the cord;

[0008] A friction disc, which is rotatably installed on the machine base and rotates coaxially with the central traction wheel;

[0009] Wherein, a tension swing rod is arranged on the machine base. The tension swing rod is rotatably installed on the machine base through a rotating shaft. The tension swing rod comprises a first force arm and a second force arm distributed on both sides of the rotating shaft. A second wire passing wheel is rotatably installed at the end of the first force arm. The end of the second force arm is fixed to the machine base through an elastic member. A tension friction belt is arranged on the first force arm. The tension friction belt is wound around the outer side of the friction disc and fixed to the machine base, so that the elastic member has a pre-tension on the tension swing rod, and the tension friction belt has a pre-friction force on the friction disc.

[0010] Preferably, a cord is wound around the outer side of the second thread passing wheel. Under the traction of the cord, the second thread passing wheel includes a first moving direction of moving upward around the rotating shaft and a second moving direction of moving downward around the rotating shaft. When the cord speed increases, the second thread passing wheel moves along the first moving direction, and when the cord speed decreases, the second thread passing wheel moves along the second moving direction.

[0011] Preferably, when the second thread passing wheel moves along the first moving direction, the frictional force of the tension friction belt on the friction disc increases, and the elastic tensile force of the elastic member on the second force arm decreases.

[0012] Preferably, when the second thread passing wheel moves along the second moving direction, the frictional force of the tension friction belt on the friction disc decreases, and the elastic tensile force of the elastic member on the second force arm increases.

[0013] Preferably, the elastic member includes a tension spring.

[0014] Preferably, a mounting seat is fixedly installed on the machine base. A bolt is screwed and installed on the mounting seat. One end of the elastic member is fixed on the mounting seat, and the other end is fixed on the second force arm. The mounting seat is used to adjust the pre-tension of the elastic member on the second force arm.

[0015] Preferably, the length of the first force arm is greater than the length of the second force arm.

[0016] Preferably, the connection position of the tension friction belt and the first force arm is located between the rotating shaft and the second thread passing wheel.

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] By arranging a tension swing rod with a second thread passing wheel on the machine base, and installing a tension friction belt with a pre-frictional force on the friction disc on the first force arm in the present utility model, when the speed of the steel cord increases, the pulling force of the steel cord on the second thread passing wheel increases, driving the frictional force between the tension friction belt and the friction disc to increase, thereby reducing the rotation speed of the central traction wheel and achieving the effect of reducing the traction speed of the steel cord. A spring with a pre-tension is installed on the second force arm, so that the second thread passing wheel on the first force arm has a certain pre-tensile force on the steel cord, thus avoiding the steel cord from loosening from the second thread passing wheel when the speed is reduced or the machine stops, improving the tension stability of the stranding equipment, and solving the quality problem caused by the looseness and tightness of the steel cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in each figure may be denoted by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present utility model will be described by way of example and with reference to the drawings, wherein:

[0020] Figure 1 is a front structural schematic diagram of a tension stabilizing device for central traction shown in an embodiment of the present utility model;

[0021] Figure 2 is a back structural schematic diagram of a tension stabilizing device for central traction shown in an embodiment of the present utility model;

[0022] 10. Machine base; 11. Central traction wheel; 12. First wire passing wheel; 13. Friction disc; 14. Mounting seat; 20. Tension swing rod; 200. Rotating shaft; 201. First force arm; 202. Second force arm; 21. Second wire passing wheel; 30. Tension friction belt; 40. Elastic member. Detailed implementation manners

[0023] In order to better understand the technical content of the present utility model, specific embodiments are hereby given and described in conjunction with the accompanying drawings as follows.

[0024] As Figure 1 and Figure 2 shown, the present utility model provides a tension stabilizing device for central traction, including a machine base 10, a central traction wheel 11 and a tension swing rod 20.

[0025] Among them, the machine base 10 is arranged in a steel cord stranding device and is located between the front-stage stranding device and the rear-stage stranding device. The central traction wheel 11 is installed on the machine base 10 and is used to traction the cord of the rear-stage stranding device into the front-stage stranding device.

[0026] Further, the first wire passing wheel 12 is rotatably installed on the machine base 10 and is placed beside the central traction wheel 11 for cooperating with the central traction wheel 11 to conduct the steel cord. The friction disc 13 is rotatably installed on the machine base 10 and is located at the rear side of the central traction wheel 11 and can rotate coaxially with the central traction wheel 11. Cooperating with the tension friction belt 30 arranged outside the friction disc 13, it can limit the rotation speed of the central traction wheel 11 and avoid the traction speed of the steel cord from being too fast.

[0027] Furthermore, in order to improve the stability of the steel cord pay-off, a tension swing rod 20 is provided on the machine base 10, and the tension swing rod 20 is rotatably installed on the machine base 10 through a rotating shaft 200.

[0028] Among them, the tension swing rod 20 includes a first force arm 201 and a second force arm 202 distributed on both sides of the rotating shaft 200. A second wire passing wheel 21 is rotatably installed at the end of the first force arm 201. The second wire passing wheel 21, the central traction wheel 11, and the first wire passing wheel 12 are all in the same plane. The steel cord is introduced from the central traction wheel 11, passes through the first wire passing wheel 12, and then is led out from the second wire passing wheel 21, jointly playing a role in conducting the steel cord.

[0029] Further, a tension friction belt 30 is installed at a position on the first force arm 201 between the rotating shaft 200 and the second wire passing wheel 21. The other end of the tension friction belt 30 is wound around the outside of the friction disk 13 and fixed to the machine base 10, and the tension friction belt 30 has a pre-frictional force on the friction disk 13.

[0030] In this way, the rotation of the central traction wheel 11 has a certain resistance. Especially when the speed of the steel cord led out from the second wire passing wheel 21 increases, the pulling force of the steel cord on the second wire passing wheel 21 increases. At this time, the first force arm 201 will move upward around the rotating shaft 200. During the upward movement, the tension friction belt 30 will be pulled, increasing the frictional force between the tension friction belt 30 and the friction disk 13, thereby reducing the rotation speed of the central traction wheel 11 and achieving the effect of reducing the traction speed of the steel cord.

[0031] Further, the end of the second force arm 202 is fixed to the machine base 10 through an elastic member 40, and the elastic member 40 has a pre-tensile force on the tension swing rod 20.

[0032] Optionally, the elastic member 40 is a tension spring. An installation seat 14 is fixedly installed on the machine base 10, and a bolt is screwed on the installation seat 14. One end of the tension spring is fixed on the installation seat 14, and the other end is fixed on the second force arm 202. The installation seat 14 is used to adjust the pre-tensile force of the tension spring on the second force arm 202.

[0033] In this way, the second wire passing wheel 21 on the tension swing rod 20 has a certain pre-tensile force on the steel cord. Especially when the speed of the steel cord led out from the second wire passing wheel 21 slows down, the pulling force of the steel cord on the second wire passing wheel 21 decreases. At this time, the first force arm 201 will move downward around the rotating shaft 200. During the downward movement, the frictional force between the tension friction belt 30 and the friction disk 13 decreases accordingly. In the case of not installing a tension spring, the steel cord will become loose. However, the setting of the tension spring has a pre-tensile force on the second force arm 202, enabling the second wire passing wheel 21 on the first force arm 201 to have a certain pre-tensile force on the steel cord, thereby avoiding the steel cord from loosening from the second wire passing wheel 21 when the speed is reduced or the machine stops.

[0034] Further, the length of the first force arm 201 is greater than that of the second force arm 202, enabling the tension spring on the side of the second force arm 202 to have better control over the second wire passing wheel 21 of the first force arm 201, so as to avoid the second wire passing wheel 21 having excessive movement and thus improve the stability of wire passing.

[0035] In some embodiments, a steel cord is wound around the outer side of the second wire passing wheel 21. Under the traction of the cord, the second wire passing wheel 21 includes a first moving direction of moving upward around the rotating shaft 200 and a second moving direction of moving downward around the rotating shaft 200.

[0036] When the cord speed increases, the second wire passing wheel 21 moves in the first moving direction, the frictional force of the tension friction belt 30 on the friction disc 13 increases, and further reduces the rotation speed of the central traction wheel 11, achieving the effect of reducing the traction speed of the steel cord. The elastic tension of the elastic member 40 on the second force arm 202 decreases.

[0037] When the cord speed decreases, the second wire passing wheel 21 moves in the second moving direction, the frictional force of the tension friction belt 30 on the friction disc 13 decreases, and the elastic tension of the elastic member 40 on the second force arm 202 increases, so that the second wire passing wheel 21 on the first force arm 201 has a certain pre-tensioning force on the steel cord, thus preventing the steel cord from loosening from the second wire passing wheel 21 when the speed is reduced or the machine stops.

[0038] Combining the above embodiments, by providing a tension swing rod 20 equipped with a second wire passing wheel 21 on the machine base 10 and installing a tension friction belt 30 with a pre-frictional force on the friction disc 13 on the first force arm 201, when the speed of the steel cord increases, the pulling force of the steel cord on the second wire passing wheel 21 increases, driving the frictional force between the tension friction belt 30 and the friction disc 13 to increase, and further reducing the rotation speed of the central traction wheel 11, achieving the effect of reducing the traction speed of the steel cord. A spring with a pre-tension is installed on the second force arm 202, so that the second wire passing wheel 21 on the first force arm 201 has a certain pre-tensioning force on the steel cord, thus preventing the steel cord from loosening from the second wire passing wheel 21 when the speed is reduced or the machine stops, improving the tension stability of the stranding equipment, and solving the quality problems caused by the looseness and tightness of the steel cord.

[0039] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Those with ordinary knowledge in the technical field to which the present utility model belongs can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be determined by the scope defined in the claims.

Claims

1. A tension stabilizing device for central traction, characterized in that: include: A machine base (10) is arranged in the steel cord stranding device and is located between the front-stage twisting device and the rear-stage twisting device; A central traction wheel (11), mounted on the machine base (10) and used to pull the cord of the rear-stage twisting device into the front-stage twisting device; A first wire passing wheel (12) is rotatably mounted on the machine base (10) and is used for conducting the cord; A friction disc (13) is rotatably mounted on the machine base (10) and rotates coaxially with the central traction wheel (11); Wherein, a tension swing rod (20) is provided on the machine base (10), and the tension swing rod (20) is rotatably mounted on the machine base (10) via a rotating shaft (200), and the tension swing rod (20) includes a first force arm (201) and a second force arm (202) distributed on both sides of the rotating shaft (200), and a second wire passing wheel (21) is rotatably mounted on the end of the first force arm (201), and the end of the second force arm (202) is fixed to the machine base (10) via an elastic member (40), and a tension friction belt (30) is provided on the first force arm (201), and the tension friction belt (30) is wound around the outer side of the friction disk (13) and fixed to the machine base (10), so that the elastic member (40) has a pre-tension force on the tension swing rod (20), and the tension friction belt (30) has a pre-friction force on the friction disk (13).

2. The tension stabilizing device for central traction according to claim 1, characterized in that: A cord is wound around the outer side of the second wire-passing wheel (21). Under the traction of the cord, the second wire-passing wheel (21) includes a first moving direction of upward movement around the rotating shaft (200) and a second moving direction of downward movement around the rotating shaft (200). When the cord speed increases, the second wire-passing wheel (21) moves along the first moving direction, and when the cord speed decreases, the second wire-passing wheel (21) moves along the second moving direction.

3. The tension stabilizing device for central traction according to claim 2, characterized in that: When the second wire-passing wheel (21) moves along the first movable direction, the friction force of the tension friction belt (30) on the friction disk (13) increases, and the elastic pulling force of the elastic member (40) on the second force arm (202) decreases.

4. The tension stabilizing device for central traction according to claim 2, characterized in that: When the second wire-passing wheel (21) moves along the second movable direction, the friction force of the tension friction belt (30) on the friction disk (13) decreases, and the elastic pulling force of the elastic member (40) on the second force arm (202) increases.

5. The tension stabilizing device for central traction according to claim 1, characterized in that: The elastic member (40) comprises a tension spring.

6. The tension stabilizing device for central traction according to claim 1, characterized in that: A mounting seat (14) is fixedly mounted on the machine base (10), a bolt is threadedly mounted on the mounting seat (14), one end of the elastic member (40) is fixed on the mounting seat (14), and the other end is fixed on the second force arm (202), and the mounting seat (14) is used to adjust the pre-tension of the elastic member (40) on the second force arm (202).

7. The tension stabilizing device for central traction according to claim 1, characterized in that: The length of the first lever arm (201) is greater than the length of the second lever arm (202).

8. The tension stabilizing device for central traction according to claim 1, characterized in that: The connection point between the tension friction belt (30) and the first force arm (201) is located between the rotating shaft (200) and the second wire passing wheel (21).