A PVC power cord stranding machine

Abstract

The present invention discloses a PVC power cord stranding machine, which includes a workbench and a shaping tube. On both sides of the top of the workbench, there are respectively arranged a PVC power cord pay-off device and a PVC power cord take-up device. The PVC power cord pay-off device includes a fixed pay-off rack fixedly installed on one side of the right side of the top of the workbench and a sliding pay-off rack slidably installed on the other side. The fixed pay-off rack and the sliding pay-off rack are parallel to each other. In the present invention, a servo motor drives two ball screws with opposite thread directions to rotate synchronously, thereby driving two moving plates to move towards each other. The moving plates inwardly squeeze the limit stop blocks, limit rods, arc-shaped clamping plates and sponge pads, and finally the sponge pads are used to squeeze and fix the shaping tube. And since the positions of the two arc-shaped clamping plates can be adjusted along the circumferential direction trajectory within the moving range, different sizes of shaping tubes can be adapted, and the application range is wider.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC power cords, and in particular to a stranding machine for PVC power cords. Background Art

[0002] A stranding machine is a wire and power cord device used for stranding and armoring multi-core rubber-sheathed power cords, plastic power cords, cross-linked power cords, telephone power cords, and control power cords of various cross-sections. It has a wide range of uses and good market prospects.

[0003] Publication No. CN213277611U discloses a fully automatic stranding machine, including a base and a shaping tube. A wire pay-off stand, a stranding cage, and a take-up stand are respectively arranged on the base. A plurality of feeding rollers are arranged on the wire pay-off stand, and a take-up roller is arranged on the take-up stand. A fixed seat is also arranged on the base, and the fixed seat is located between the stranding cage and the take-up stand. A fixed frame is arranged on the fixed seat, a fixing hole is opened on the fixed frame, a pressing rod is inserted into the fixing hole, and the shaping tube is pressed between the pressing rod and the fixed seat. A driving member for driving the pressing rod to move in the vertical direction is also arranged on the fixed frame.

[0004] In the above solution: Workers can replace shaping tubes with different apertures according to needs, so that the stranding machine can process cables with different wire diameters, thereby improving the applicability of the stranding machine; The hydraulic cylinder can push the shaping tube out of the positioning groove when the shaping tube needs to be replaced, so that workers can more labor-savingly remove the shaping tube from the fixed seat, saving manpower.

[0005] The above solution has made progress compared with the prior art (Publication No. CN211087992U), but there are still two problems in its use process: First, the clamping and fixing steps of the shaping tube in the above solution are relatively cumbersome, and since the size of the arc-shaped positioning groove cannot be changed, it cannot be perfectly matched with the clamping at the bottom of the shaping tube; Second, in the above solution, when replacing the shaping tube, the feeding process of the shaping tube is time-consuming and laborious, which is inconvenient. Summary of the Invention

[0006] The purpose of the present invention is to provide a stranding machine for PVC power cords to solve the problems raised in the above background art section.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A PVC power cord stranding machine includes a workbench and a shaping tube. On both sides of the top of the workbench, there are respectively arranged a PVC power cord pay-off device and a PVC power cord take-up device. The PVC power cord pay-off device includes a fixed pay-off rack fixedly installed on one side of the right side of the top of the workbench and a sliding pay-off rack slidably installed on the other side. The fixed pay-off rack and the sliding pay-off rack are parallel to each other. A plurality of aligned first rotation holes are formed in the fixed pay-off rack and the sliding pay-off rack. A first rotating shaft is rotatably installed in the first rotation hole. On one side of the two first rotating shafts close to each other, there are respectively fixedly installed first limiting plates. On one side of the two first limiting plates close to each other, there is fixedly installed a pay-off roller. The PVC power cord take-up device includes a fixed take-up rack fixedly installed on one side of the left side of the top of the workbench and a sliding take-up rack slidably installed on the other side. The fixed take-up rack and the sliding take-up rack are parallel to each other. Aligned second rotation holes are formed in the fixed take-up rack and the sliding take-up rack. A second rotating shaft is rotatably installed in the second rotation hole. On one side of the two second rotating shafts close to each other, there are respectively fixedly installed second limiting plates. On one side of the two second limiting plates close to each other, there is fixedly installed a take-up roller. A stranding cage and a shaping tube clamping mechanism are respectively arranged between the PVC power cord pay-off device and the PVC power cord take-up device.

[0009] Preferably, the other side of the first rotating shaft or the second rotating shaft extends outside the rotation hole and is fixedly sleeved inside one side of the coupling. The other side inside the coupling is fixedly sleeved with a driving shaft. The other side of the driving shaft is fixedly sleeved on the output end of the driving motor.

[0010] Preferably, the shaping tube clamping mechanism includes two spliced arc-shaped clamping plates. On one side of the two arc-shaped clamping plates close to each other, there are respectively fixedly connected with sponge pads. On one side of the two arc-shaped clamping plates far from each other, there are respectively fixedly provided with limiting plates. A limiting hole is formed in the limiting plate. A limiting rod is fixedly installed at the bottom of the arc-shaped clamping plate. The limiting rod slidably penetrates through the limiting hole and is fixedly installed with a limiting block.

[0011] Preferably, a support plate is arranged directly below the workbench. The support plate and the workbench are fixedly connected through a connecting plate. Two ball screws with opposite thread directions are arranged directly above the support plate. On one side of the two ball screws close to each other, there are respectively fixedly connected to both sides of the connecting block. The outer side of the nut of the ball screw is fixedly sleeved with a moving plate. On one side of the two moving plates close to each other, there are respectively fixedly connected with rubber pads. On one side of the two rubber pads close to each other, they respectively abut against the side of the limiting block far from the limiting rod.

[0012] Preferably, one end of the threaded rod of the ball screw is fixedly sleeved on the output end of the servo motor. On both sides of the top of the support plate, bearing mounting plates are fixedly installed respectively. A bearing is fixedly sleeved inside the bearing mounting plate, and the threaded rod of the ball screw is fixedly sleeved in the inner ring of the bearing.

[0013] Preferably, a first convex limiting sliding groove is formed on the top of the workbench. Both the sliding wire pay-off rack and the sliding wire take-up rack are slidably installed in the first convex limiting sliding groove. On one side of the bottom of both the sliding wire pay-off rack and the sliding wire take-up rack, a T-shaped pull rod is fixedly installed.

[0014] Preferably, a second convex limiting sliding groove is formed on the top of the workbench. A convex limiting sliding block is slidably installed in the second convex limiting sliding groove. A bearing seat is fixedly installed on the top of the convex limiting sliding block, and a buffer rubber pad is fixedly installed on the top of the bearing seat.

[0015] Preferably, a U-shaped handle is fixedly installed on one side of the bearing seat.

[0016] Preferably, support legs are fixedly installed around the bottom of the workbench respectively.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the present invention, the servo motor drives two ball screws with opposite thread directions to rotate synchronously, thereby driving the two moving plates to move towards each other. The moving plates inwardly squeeze the limit stop block, the limit rod, the arc-shaped clamping plate and the sponge pad, and finally the sponge pad is used to squeeze and fix the shaping tube. And since the positions of the two arc-shaped clamping plates can be adjusted along the circumferential direction trajectory within the moving range, different sizes of shaping tubes can be adapted, and the application range is wider.

[0019] 2. In the present invention, the servo motor drives two ball screws with opposite thread directions to rotate synchronously, thereby driving the two moving plates to move away from each other. After the arc-shaped clamping plate moves away from directly below the shaping tube, the shaping tube can fall onto the buffer rubber pad, and the blanking process is very convenient, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of a PVC power cable stranding machine proposed by the present invention;

[0021] Figure 2 is a side view structural schematic diagram of a PVC power cable stranding machine proposed by the present invention;

[0022] Figure 3 is a front view structural schematic diagram of a PVC power cable stranding machine proposed by the present invention;

[0023] Figure 4 Schematic three-dimensional structure diagram of the workbench of a PVC power cord stranding machine proposed by the present invention;

[0024] Figure 5 Schematic structure diagram of the shaping tube clamping mechanism of a PVC power cord stranding machine proposed by the present invention;

[0025] Figure 6 Schematic structure diagram of the convex limit slider, bearing seat and buffer rubber pad of a PVC power cord stranding machine proposed by the present invention.

[0026] In the figure: 1 workbench, 2 shaping tube, 3 PVC power cord pay-off device, 3a fixed pay-off frame, 3b sliding pay-off frame, 3c first rotating shaft, 3d first limit plate, 3e pay-off roller, 4 PVC power cord take-up device, 4a fixed take-up frame, 4b sliding take-up frame, 4c second rotating shaft, 4d second limit plate, 4e take-up roller, 5 cage, 6 shaping tube clamping mechanism, 6a arc-shaped clamping plate, 6b limit plate, 6c limit rod, 6d limit stop block, 6e support plate, 6f ball screw, 6g connecting block, 6h moving plate, 6i rubber pad, 6j bearing mounting plate, 7 coupling, 8 drive shaft, 9 first convex limit chute, 10 second convex limit chute, 11 convex limit slider, 12 bearing seat, 13 buffer rubber pad, 14 U-shaped handle, 15 support leg, 16 drive motor, 17 servo motor, 18 T-shaped pull rod. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Please refer to Figure 1-6 , a PVC power cord stranding machine, including a workbench 1 and a shaping tube 2. On both sides of the top of the workbench 1, a PVC power cord pay-off device 3 and a PVC power cord take-up device 4 are respectively arranged. The PVC power cord pay-off device 3 includes a fixed pay-off rack 3a fixedly installed on one side of the right side of the top of the workbench 1 and a sliding pay-off rack 3b slidably installed on the other side. The fixed pay-off rack 3a and the sliding pay-off rack 3b are parallel to each other. A plurality of aligned first rotation holes are formed in the fixed pay-off rack 3a and the sliding pay-off rack 3b. A first rotating shaft 3c is rotatably installed in the first rotation hole. On one side of the two first rotating shafts 3c close to each other, first limit plates 3d are respectively fixedly installed. On one side of the two first limit plates 3d close to each other, a pay-off roller 3e is fixedly installed. The PVC power cord take-up device 4 includes a fixed take-up rack 3a fixedly installed on one side of the left side of the top of the workbench 1 and a sliding take-up rack 4b slidably installed on the other side. The fixed take-up rack 4a and the sliding take-up rack 4b are parallel to each other. Aligned second rotation holes are formed in the fixed take-up rack 4a and the sliding take-up rack 4b. A second rotating shaft 4c is rotatably installed in the second rotation hole. On one side of the two second rotating shafts 4c close to each other, second limit plates 4d are respectively fixedly installed. On one side of the two second limit plates 4d close to each other, a take-up roller 4e is fixedly installed. A stranding cage 5 and a shaping tube clamping mechanism 6 are respectively arranged between the PVC power cord pay-off device 3 and the PVC power cord take-up device 4. By driving two ball screws 6f with opposite thread directions to rotate synchronously through a servo motor 17, two moving plates 6h are driven to move towards each other. The moving plate 6h squeezes the limit stop block 6d, the limit rod 6c, the arc-shaped clamping plate 6a and the sponge pad inward. Finally, the shaping tube 2 is squeezed and fixed by the sponge pad. And since the positions of the two arc-shaped clamping plates 6a can be adjusted along the circumferential direction trajectory within the moving range, different sizes of shaping tubes 2 can be adapted, and the application range is wider. By driving two ball screws 6f with opposite thread directions to rotate synchronously through a servo motor 17, two moving plates 6h are driven to move away from each other. After the arc-shaped clamping plate 6a moves away from directly below the shaping tube 2, the shaping tube 2 can fall onto the buffer rubber pad 13, and the blanking process is very convenient, saving time and effort.

[0031] On the other side of the first rotating shaft 3c or the second rotating shaft 4c, both extend outside the rotating hole and are fixedly sleeved on the inner side of the coupling 7. On the other inner side of the coupling 7, a driving shaft 8 is fixedly sleeved. On the other side of the driving shaft 8, it is fixedly sleeved on the output end of the driving motor 16. The driving motor 16 drives the driving shaft 8 to rotate, and then drives the first rotating shaft 3c or the second rotating shaft 4c to rotate through the coupling 7.

[0032] The shaping pipe clamping mechanism 6 includes two arc-shaped clamping plates 6a that are spliced with each other. On the side where the two arc-shaped clamping plates 6a approach each other, sponge pads are respectively fixedly connected. On the side where the two arc-shaped clamping plates 6a are away from each other, limiting plates 6b are respectively fixedly arranged. Limiting holes are opened in the limiting plates 6b. A limiting rod 6c is fixedly installed at the bottom of the arc-shaped clamping plate 6a. The limiting rod 6c slidably penetrates through the limiting hole and a limiting block 6d is fixedly installed. The shaping pipe 2 with different sizes is placed by the two spliced arc-shaped clamping plates 6a, and the shaping pipe 2 is squeezed and fixed by the sponge pads.

[0033] A support plate 6e is arranged directly below the workbench 1. The support plate 6e is fixedly connected to the workbench 1 through a connecting plate. Above the support plate 6e, there are two ball screws 6f with opposite thread directions. On the side where the two ball screws 6f approach each other, they are respectively fixedly connected to both sides of the connecting block 6g. A moving plate 6h is fixedly sleeved on the outer side of the nut of the ball screw 6f. On the side where the two moving plates 6h approach each other, rubber pads 6i are respectively fixedly connected. On the side where the two rubber pads 6i approach each other, they respectively abut against the side of the limiting block 6d away from the limiting rod 6c. The limiting block 6d is resisted and released by the two moving plates 6h approaching or separating from each other.

[0034] One end of the threaded rod of the ball screw 6f is fixedly sleeved on the output end of the servo motor 17. On both sides of the top of the support plate 6e, bearing mounting plates 6j are respectively fixedly installed. Bearings are fixedly sleeved in the bearing mounting plates 6j. The threaded rod of the ball screw 6f is fixedly sleeved in the inner ring of the bearing. The rotation of the threaded rod of the ball screw 6f is limited by the bearing.

[0035] A first convex limiting sliding groove 9 is opened on the top of the workbench 1. Both the sliding wire feeding frame 3b and the sliding wire winding frame 4b are slidably installed in the first convex limiting sliding groove 9. On one side of the bottom of the sliding wire feeding frame 3b and the sliding wire winding frame 4b, a T-shaped pull rod 18 is fixedly installed. It is convenient to pull the sliding wire feeding frame 3b and the sliding wire winding frame 4b to move through the T-shaped pull rod 18.

[0036] A second convex limiting sliding groove 10 is formed in the top of the workbench 1. A convex limiting sliding block 11 is slidably installed in the second convex limiting sliding groove 10. A bearing seat 12 is fixedly installed on the top of the convex limiting sliding block 11. A buffer rubber pad 13 is fixedly installed on the top of the bearing seat 12. The movement track of the convex limiting sliding block 11 is limited by the second convex limiting sliding groove 10. The buffer rubber pad 13 has elasticity and can protect the falling shaping tube 2 from damage.

[0037] A U-shaped handle 14 is fixedly installed on one side of the bearing seat 12. It is convenient to pull the bearing seat 12 to move back and forth through the U-shaped handle 14.

[0038] Support legs 15 are fixedly installed around the bottom of the workbench 1 respectively. The four support legs 15 are used to support the periphery of the bottom of the workbench 1.

[0039] In summary, in the present invention, when the shaping tube 2 needs to be replaced, the servo motor 17 is started. The external controller controls the servo motor 17 to rotate forward. The servo motor 17 drives the two ball screws 6f with opposite thread directions to rotate synchronously, so as to drive the two moving plates 6h to move in the direction away from each other. After the moving plate 6h moves, the limiting rod 6c slides down along the inner wall of the limiting hole under the action of the component force of gravity. Therefore, the two arc-shaped clamping plates 6a also move synchronously and are separated from the shaping tube 2. Subsequently, the shaping tube 2 falls onto the buffer rubber pad 13. Then, the positions of the limiting rod 6c and the arc-shaped clamping plates 6a are adjusted by the moving plate 6h, aiming to make the two arc-shaped clamping plates 6a re-match the placement of the shaping tube 2 with a new size. After the placement of the new shaping tube 2 is completed, the servo motor 17 is started. The external controller controls the servo motor 17 to rotate reversely. The servo motor 17 drives the two ball screws 6f with opposite thread directions to rotate synchronously, so as to drive the two moving plates 6h to move in the direction close to each other. The moving plate 6h squeezes the limiting block 6d, the limiting rod, the arc-shaped clamping plate 6a and the sponge pad inward, and finally the sponge pad is used to squeeze and fix the shaping tube 2.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A PVC power cord stranding machine, comprising a workbench (1) and a shaping tube (2), characterized in that, On both sides of the top of the workbench (1), a PVC power cord pay-off device (3) and a PVC power cord take-up device (4) are respectively arranged. The PVC power cord pay-off device (3) includes a fixed pay-off rack (3a) fixedly installed on one side of the right side of the top of the workbench (1) and a sliding pay-off rack (3b) slidably installed on the other side. The fixed pay-off rack (3a) and the sliding pay-off rack (3b) are parallel to each other. A plurality of aligned first rotation holes are formed in the fixed pay-off rack (3a) and the sliding pay-off rack (3b). A first rotating shaft (3c) is rotatably installed in the first rotation holes. On one side of the two first rotating shafts (3c) close to each other, a first limiting plate (3d) is respectively fixedly installed. On one side of the two first limiting plates (3d) close to each other, a pay-off roller (3e) is fixedly installed. The PVC power cord take-up device (4) includes a fixed take-up rack (4a) fixedly installed on one side of the left side of the top of the workbench (1) and a sliding take-up rack (4b) slidably installed on the other side. The fixed take-up rack (4a) and the sliding take-up rack (4b) are parallel to each other. Aligned second rotation holes are formed in the fixed take-up rack (4a) and the sliding take-up rack (4b). A second rotating shaft (4c) is rotatably installed in the second rotation holes. On one side of the two second rotating shafts (4c) close to each other, a second limiting plate (4d) is respectively fixedly installed. On one side of the two second limiting plates (4d) close to each other, a take-up roller (4e) is fixedly installed. A cage (5) and a shaping tube clamping mechanism (6) are respectively arranged between the PVC power cord pay-off device (3) and the PVC power cord take-up device (4). The shaping tube clamping mechanism (6) includes two spliced arc-shaped clamping plates (6a). On one side of the two arc-shaped clamping plates (6a) close to each other, a sponge pad is respectively fixedly connected. On one side of the two arc-shaped clamping plates (6a) away from each other, a limiting plate (6b) is respectively fixedly arranged. A limiting hole is formed in the limiting plate (6b). A limiting rod (6c) is fixedly installed at the bottom of the arc-shaped clamping plate (6a). The limiting rod (6c) slidably penetrates through the limiting hole and a limiting block (6d) is fixedly installed. A support plate (6e) is arranged directly below the workbench (1). The support plate (6e) is fixedly connected to the workbench (1) through a connecting plate. Two ball screws (6f) with opposite thread directions are arranged directly above the support plate (6e). On one side of the two ball screws (6f) close to each other, they are respectively fixedly connected to both sides of a connecting block (6g). A moving plate (6h) is fixedly sleeved outside the nut of the ball screw (6f). On one side of the two moving plates (6h) close to each other, a rubber pad (6i) is respectively fixedly connected. On one side of the two rubber pads (6i) close to each other, they respectively abut against one side of the limiting block (6d) away from the limiting rod (6c). One end of the threaded rod of the ball screw (6f) is fixedly sleeved on the output end of a servo motor (17). Bearing mounting plates (6j) are respectively fixedly installed on both sides of the top of the support plate (6e).A bearing is fixedly sleeved inside the bearing mounting plate (6j), and the threaded rod of the ball screw (6f) is fixedly sleeved in the inner ring of the bearing., 2. The PVC power cord stranding machine according to claim 1, characterized in that, The other sides of the first rotating shaft (3c) or the second rotating shaft (4c) both extend outside the rotating holes and are fixedly sleeved on the inner side of the coupling (7). The other side of the inner part of the coupling (7) is fixedly sleeved with a drive shaft (8), and the other side of the drive shaft (8) is fixedly sleeved on the output end of the drive motor (16).

3. The PVC power cord stranding machine according to claim 1, characterized in that, A first convex limiting sliding groove (9) is formed in the top of the workbench (1). The sliding wire pay-off frame (3b) and the sliding wire take-up frame (4b) are both slidably installed in the first convex limiting sliding groove (9). T-shaped pull rods (18) are fixedly installed on one side of the bottoms of the sliding wire pay-off frame (3b) and the sliding wire take-up frame (4b).

4. The PVC power cord cabling machine according to claim 1, characterized in that, A second convex limiting sliding groove (10) is formed in the top of the workbench (1). A convex limiting slider (11) is slidably installed in the second convex limiting sliding groove (10). A bearing seat (12) is fixedly installed on the top of the convex limiting slider (11), and a buffer rubber pad (13) is fixedly installed on the top of the bearing seat (12).

5. The PVC power cord cabling machine according to claim 4, characterized in that, A U-shaped handle (14) is fixedly installed on one side of the bearing seat (12).

6. The PVC power cord stranding machine according to claim 1, characterized in that, Support legs (15) are respectively fixedly installed around the bottom of the workbench (1).

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