A stranded wire reel brake tension adjustment mechanism

Abstract

This utility model provides a stranding reel brake tension adjustment mechanism, relating to the technical field of stranding equipment. It includes a stranding machine frame and a pay-off reel. A clamping mechanism is installed on the stranding machine frame, comprising a clamping cylinder, a lifting shaft, a lifting cone, a positioning seat, and an adjusting base. A positioning cone is fixed to the lower end of the adjusting base, and guide sleeves are fixed to the upper and lower sides of the adjusting base. A pressure adjusting disc is fixed to the top of the guide sleeves. Corresponding centrifugal grooves are provided on the brake disc and the pressure adjusting disc. Centrifugal balls are slidably placed within the centrifugal grooves. A brake disc is slidably fitted onto the outer side of the guide sleeves. A support spring connects the brake disc and the adjusting base. A brake mechanism is fixed on the stranding machine frame, and the brake mechanism abuts against the brake disc. In this utility model, the centrifugal force of the centrifugal balls can compress the brake pads, adjusting the resistance of the brake pads to the brake disc and maintaining a constant pay-off tension.

Description

Technical Field

[0001] This utility model relates to the field of stranding equipment technology, specifically to a stranding reel brake tension adjustment mechanism. Background Technology

[0002] The stranding machine is a core piece of equipment in the wire and cable industry, used to spirally twist multiple monofilaments or strands into cables. Its technical complexity and process precision directly affect the conductivity, flexibility, and lifespan of wires and cables. In existing equipment, the stranding machine's unwinding device is equipped with a constant tension braking system. To maintain stable tension throughout the unwinding process, the unwinding length needs to be preset. When the specific unwinding length is reached, the braking system automatically controls the brake pads to reduce friction on the stranding reel, thus solving the tension problem. However, this tension control method can only be roughly estimated, with significant errors, and cannot meet the constant tension unwinding requirements of wires of different materials and types. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a strand reel brake tension adjustment mechanism, which solves the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A stranding reel brake tension adjustment mechanism includes a stranding frame and a pay-off reel. A clamping mechanism for holding the pay-off reel is mounted on the stranding frame. The clamping mechanism includes a clamping cylinder fixed to the lower side of the stranding frame, a lifting shaft connected to the output end of the clamping cylinder, a lifting cone rotatably connected to the top of the lifting shaft, a positioning seat fixed to the stranding frame, and an adjusting base rotatably connected to the positioning seat. A positioning cone is fixed to the lower end of the adjusting base. The lifting cone and the positioning cone abut against the upper and lower ends of the pay-off reel. Guide sleeves are fixed to the upper and lower sides of the adjusting base. A brake disc is slidably fitted onto the outer side of the guide sleeves. A support spring connects the brake disc to the adjusting base. A braking mechanism is fixed on the stranding frame. The braking mechanism includes an electric push rod fixed to the stranding frame and a brake pad connected to the output end of the electric push rod. The brake pad abuts against the brake disc. A pressure adjusting plate is fixed to the top of the guide sleeve. Centrifugal balls are installed between the pressure adjusting plate and the brake disc.

[0008] Preferably, the brake disc and the pressure regulating disc are provided with corresponding centrifugal grooves, and the bottom wall of the centrifugal groove is integrally formed with a wedge-shaped platform, the height of the wedge-shaped platform gradually increasing from the inside to the outside.

[0009] Preferably, the centrifugal chute is inclined from the inside out, and the inclination direction of the centrifugal chute is opposite to the rotation direction of the pay-off reel.

[0010] Preferably, a plurality of positioning bolts are rotatably connected to the pressure regulating plate, the brake disc is provided with positioning holes, the positioning bolts extend downward through the positioning holes, the support spring is sleeved on the outside of the positioning bolts, the lower end of the positioning bolts is threadedly connected to a support nut, and the support spring is connected between the support nut and the brake disc.

[0011] Preferably, the adjusting base is provided with a spline groove corresponding to the positioning bolt, and the outer edge of the supporting nut is provided with a plurality of spline protrusions that slide and cooperate with the spline groove. The supporting nut is slidably installed in the spline groove.

[0012] (III) Beneficial Effects

[0013] This utility model provides a stranded wire reel brake tension adjustment mechanism. It has the following beneficial effects:

[0014] 1. In the stranding process of this utility model, when the stranding mechanism has a constant wire feeding speed, the wire feeding tension will gradually increase as the amount of wire remaining on the wire feeding reel decreases. At the same time, in order to keep the wire feeding speed constant, the rotation speed of the wire feeding reel and the clamping mechanism will be relatively increased. The centrifugal force and rotational inertia generated by the increase in rotation speed will cause the centrifugal balls to tend to swing outwards on the centrifugal balls. The height difference of the wedge platform will cause the brake disc to tend to slide away from the wedge platform, thereby reducing the friction of the brake pads on the brake disc, thereby achieving the purpose of adjusting the wire feeding tension.

[0015] 2. In this utility model, the spline groove can limit the circumferential movement of the support nut. By rotating the positioning bolt, the support nut can slide up and down. During the sliding process, the initial pressure of the support spring on the brake disc can be adjusted, thereby adjusting the ratio of the centrifugal force generated by the rotation of the centrifugal ball to the elasticity of the support spring, so as to adjust the tension compensation requirements of different materials and models of stranded wire. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a strand reel brake tension adjustment mechanism according to the present invention;

[0017] Figure 2 This is a schematic diagram of the clamping mechanism in this utility model;

[0018] Figure 3 This is a cross-sectional view of the clamping mechanism in this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the adjusting base in this utility model;

[0020] Figure 5 This is a schematic diagram of the stranding machine frame in this utility model.

[0021] In the diagram: 1. Stranding machine frame; 2. Wire feeding reel; 3. Clamping cylinder; 4. Lifting shaft; 5. Lifting cone; 6. Positioning seat; 7. Adjusting base; 8. Positioning cone; 9. Guide sleeve; 10. Pressure regulating plate; 11. Brake disc; 12. Positioning bolt; 13. Support nut; 14. Support spring; 15. Brake pad; 16. Centrifugal chute; 17. Centrifugal ball bearing. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model embodiment provides a stranded wire reel brake tension adjustment mechanism, such as... Figure 1-5 As shown, the device includes a stranding frame 1 and a pay-off reel 2. The stranding frame 1 is equipped with a clamping mechanism for holding the pay-off reel 2. The clamping mechanism includes a clamping cylinder 3 fixed to the lower side of the stranding frame 1, a lifting shaft 4 connected to the output end of the clamping cylinder 3, a lifting cone 5 rotatably connected to the top of the lifting shaft 4, a positioning seat 6 fixed to the stranding frame 1, and an adjusting base 7 rotatably connected to the positioning seat 6. A positioning cone 8 is fixed to the lower end of the adjusting base 7. The positioning seat 6 is configured as a flange seat, and a rotating bearing is fixed to the lower end of the positioning cone 8. The adjusting base 7 is fixed to the outer ring of the rotating bearing. The positioning cone 8 and the lifting cone 5 are concentrically arranged. The positioning cone 8 and the lifting cone 5 are clamped at the upper and lower ends of the pay-off reel 2. The pay-off reel 2 is positioned and clamped by the taper of the end face of the cone. During the pay-off process, the rotation of the pay-off reel 2 can drive the positioning cone 8 and the lifting cone 5 to rotate synchronously. That is, the resistance acting on the positioning cone 8 and the lifting cone 5 will act synchronously on the pay-off reel 2. Through the above principle, the braking force applied to the positioning cone can be transmitted to the pay-off reel 2, thereby controlling the pay-off tension of the pay-off reel 2.

[0024] Guide sleeves 9 are symmetrically fixed on the upper and lower sides of the adjusting base 7. A pressure regulating plate 10 is fixed to the top of the guide sleeve 9. A sliding gap is provided between the pressure regulating plate 10 and the adjusting base 7. Brake discs 11 are slidably fitted on the outer sides of both guide sleeves 9. The brake discs 11 can slide up and down within the sliding gap. Several positioning bolts 12 are rotatably connected to the pressure regulating plate 10. Two positioning rings are provided on each positioning bolt 12. The two positioning rings slide and abut against the upper and lower sides of the pressure regulating plate 10, respectively. A positioning hole is provided on the brake disc 11. The positioning bolt 12 passes through the positioning hole and extends downward. The portion of the positioning bolt 12 located at the lower end of the positioning hole is threadedly connected to a support nut 13. A support spring 14 is fitted on the upper part, with its upper and lower ends connected between the support nut 13 and the brake disc 11, respectively. The adjusting base 7 is provided with a spline groove corresponding to the positioning bolt 12. The outer edge of the support nut 13 is provided with several spline protrusions that slide and cooperate with the spline groove. The support nut 13 is slidably installed in the spline groove. By rotating the positioning bolt 12, the support nut 13 can be limited in the circumferential direction of the spline groove, allowing the support nut 13 to slide up and down in the spline groove, thereby adjusting the height between the support nut 13 and the brake disc 11 and adjusting the initial support force of the support spring 14. Under the action of the support spring 14, the brake disc 11 is held in the position of contacting the pressure regulating plate 10.

[0025] The stranding machine frame 1 is symmetrically equipped with two sets of braking mechanisms. Each braking mechanism includes a brake frame, an electric push rod, and a brake pad 15. The brake frame is fixed to the stranding machine frame 1 and is a frame-shaped structure with an opening in the middle. The opening of the brake frame is located on the edge of the brake disc 11. Two electric push rods are symmetrically installed on the upper and lower sides of the brake frame. The output end of the electric push rod extends towards the brake disc 11. The brake pad 15 is fixed to the output end of the electric push rod and abuts against the brake disc 11. Adjusting the extension height of the output end of the electric push rod can adjust the pressure of the brake pad 15 on the brake disc 11, thereby setting the initial tension for the rotation of the brake disc 11.

[0026] The brake disc 11 and the pressure regulating disc 10 are provided with corresponding centrifugal grooves 16. The centrifugal grooves 16 are inclined from the inside to the outside, and the inclination direction of the centrifugal grooves 16 is opposite to the rotation direction of the pay-off disc 2. The bottom wall of the centrifugal grooves 16 is integrally formed with a wedge-shaped platform, and the height of the wedge-shaped platform gradually increases from the inside to the outside. The centrifugal grooves 16 on the brake disc 11 and the pressure regulating disc 10 are interlocked to form a centrifugal space. Centrifugal balls 17 are slidably placed in the centrifugal space. The centrifugal force generated during the rotation of the brake disc 11 and its own inertia will push the centrifugal balls 17 to slide outward in the centrifugal grooves 16. This can compress the brake pads to squeeze the support spring 14 and move away from the brake pads 15, that is, reduce the friction of the brake pads 15 on the brake disc 11, reduce the rotational resistance of the pay-off disc 2, and maintain the anti-line tension position of the pay-off disc 2.

[0027] Working principle:

[0028] In this invention, the extension height of the output end of the electric push rod can be controlled by the pressure of the brake pad 15 on the brake disc 11. Under the action of the support spring 14, the brake disc 11 presses against the brake pad 15 with a certain pressure. This controls the wire tension of the wire feeding disc 2 by controlling the rotational resistance of the brake disc 11. This tension can be adjusted to the initial required wire feeding tension. During the wire feeding process, the outer diameter of the wire feeding disc 2 gradually decreases. With the wire feeding speed remaining constant, the rotational angular velocity of the wire feeding disc 2 gradually increases. During this process, the centrifugal force generated by the centrifugal ball 17, due to the large pressure of the brake pad 15 on the brake disc 11, will cause the centrifugal ball 17 to only move on the centrifugal groove 16. That is, as the angular velocity increases, the downward supporting force of the centrifugal ball 17 on the wedge platform gradually increases, thereby reducing the pressure between the brake pad 15 and the brake disc 11, i.e., reducing the rotational resistance of the brake disc 11. This can be achieved by gradually reducing the rotational resistance of the brake disc 11 to compensate for the tension required during the wire feeding process.

[0029] In addition, the rotating positioning bolt 12 can change the initial pressure of the support spring 14 on the brake disc 11. By the ratio between the initial pressure and the centrifugal force of the centrifugal ball 17, the increase in centrifugal force generated by the centrifugal ball 17 can be matched with the required tension compensation attenuation speed, so as to meet the tension requirements of stranded wires of different materials and models.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A capstan brake tension adjustment mechanism comprising a capstan frame and a payout reel, characterised in that: The stranding machine frame is equipped with a clamping mechanism for holding the pay-off reel. The clamping mechanism includes a clamping cylinder fixed to the lower side of the stranding machine frame, a lifting shaft connected to the output end of the clamping cylinder, a lifting cone rotatably connected to the top of the lifting shaft, a positioning seat fixed to the stranding machine frame, and an adjusting base rotatably connected to the positioning seat. The lower end of the adjusting base is fixed with a positioning cone. The lifting cone and the positioning cone abut against the upper and lower ends of the pay-off reel. Guide sleeves are fixed on the upper and lower sides of the adjusting base. A brake disc is slidably fitted on the outer side of the guide sleeve. A support spring is connected between the brake disc and the adjusting base. A braking mechanism is fixed on the stranding machine frame. The braking mechanism includes an electric push rod fixed to the stranding machine frame and a brake pad connected to the output end of the electric push rod. The brake pad abuts against the brake disc. A pressure regulating plate is fixed to the top of the guide sleeve. Centrifugal balls are installed between the pressure regulating plate and the brake disc.

2. The stranded wire reel brake tension adjusting mechanism according to claim 1, characterized in that: The brake disc and the pressure regulating disc are provided with corresponding centrifugal grooves. The bottom wall of the centrifugal groove is integrally formed with a wedge-shaped platform, and the height of the wedge-shaped platform gradually increases from the inside to the outside.

3. The stranded wire reel brake tension adjusting mechanism according to claim 2, characterized in that: The centrifugal chute is inclined from the inside out, and the inclination direction of the centrifugal chute is opposite to the rotation direction of the pay-off reel.

4. The stranded wire reel brake tension adjusting mechanism according to claim 3, characterized in that: The pressure regulating plate is rotatably connected to several positioning bolts, the brake disc is provided with positioning holes, the positioning bolts extend downward through the positioning holes, the support spring is sleeved on the outside of the positioning bolts, the lower end of the positioning bolts is threadedly connected to a support nut, and the support spring is connected between the support nut and the brake disc.

5. The stranded wire reel brake tension adjusting mechanism according to claim 4, characterized in that: The adjusting base is provided with a spline groove corresponding to the positioning bolt, and the outer edge of the support nut is provided with a plurality of spline protrusions that slide and cooperate with the spline groove. The support nut is slidably installed in the spline groove.

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