Rotary pre-twisting machine

Abstract

The utility model discloses a rotary pre-twisting machine which comprises a machine frame, the two ends of the machine frame are connected with a main shaft through bearing seats, the center of the main shaft is provided with a through long center hole, the upper surface and the lower surface of the main shaft are respectively provided with two arc-shaped grooves, and the arc-shaped grooves in the upper surface and the arc-shaped grooves in the lower surface are distributed in a staggered mode. The arc-shaped grooves are communicated with the center hole, guide wheels are arranged in the arc-shaped grooves and rotationally connected to the upper portion and the lower portion of the main shaft through supporting bases respectively, the center hole and the arc-shaped grooves are used for allowing cables to penetrate through and winding the cables to the guide wheels, the cables in the center hole are tangent to the guide wheels, and the cables are wound and distributed on the same plane. According to the utility model, the problems that the friction force between the cable and the guide wheel is large in the winding process and the guide wheel needs to be driven by the reduction gearbox to rotate for feeding the cable are solved, and the friction force between the cable and the guide wheel is reduced by distributing the guide wheel and the cable on the same plane, so that the cable feeding is driven by the take-up of the single twister.

Description

Technical Field

[0001] The utility model relates to the technical field of cable twisting equipment, in particular to a rotary pre-twisting machine. Background Art

[0002] The pre-twisting machine is a device used to pre-twist the cables before they enter the twisting machine. The pre-twisting machine shares the twisting load of the bundler, making the cables round and full.

[0003] For example, in the pre-twisting machine provided in patent CN201749742, after the cable is wound around the three guide wheels on the rotating arm, it rotates at a speed synchronized with the main machine under the action of the motor to perform preliminary twisting of the cable. In this patent, the cable enters from the incoming guide wheel, passes through the rear wheel of the active taking-up wheel group, and is wound into the passive taking-up wheel, and then crosses into the front wheel of the active taking-up wheel group, and finally exits. In the above scheme, the cables are cross-wound, resulting in large friction between the guide wheel and the cable, and an additional reduction gearbox is required to provide power to drive the active taking-up wheel group to rotate to realize the cable feeding, which has high production costs. At the same time, the rotating arm has a large volume and weight, high requirements for the motor, and reduces its maximum twisting speed, thereby reducing production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a rotary pre-twisting machine, which winds the cables around multiple guide wheels so that the cables are located on the same plane, thereby reducing the friction between the cables and the guide wheels, making it convenient for a single twisting machine to drive the cables on the guide wheels to run when the cables are taken up, avoiding the use of a reduction gearbox to drive the guide wheels to rotate for cable feeding, and reducing equipment costs.

[0005] The utility model provides the following technical solution: a rotary pre-twisting machine comprises a frame, both ends of the frame are connected with a main shaft through a bearing seat, a through-length center hole is opened in the center of the main shaft, two arc grooves are respectively opened on the upper surface and the lower surface of the main shaft, the arc grooves on the upper surface and the arc grooves on the lower surface are staggered, the arc grooves are connected with the center hole, guide wheels are arranged in the four arc grooves, the guide wheels are rotatably connected above and below the main shaft through a support seat, the center hole and the arc groove are used to pass the cable and wind the cable onto the guide wheel, the cable in the center hole is tangent to the guide wheel, the cable winding is distributed on the same plane, and the main shaft is driven to rotate by a motor.

[0006] In order to distribute the cables on the same plane, the guide wheel includes a rotating part and a wire part. The wire part is formed on the circumference of the rotating part. The radial cross-section of the rotating part is trapezoidal. The wire part is trapezoidal in shape, and a wire embedding groove is opened on the outer end face of the wire part.

[0007] In order to reduce the pressure between the cable and the guide wheel and facilitate the single twisting machine to drive the cable to run on the guide wheel, the guide wheel includes a first guide wheel, a second guide wheel, a third guide wheel and a fourth guide wheel, the first guide wheel and the second guide wheel are both located at the lower end of the main shaft, the third guide wheel and the fourth guide wheel are located at the upper end of the main shaft, the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are on the same plane, the second guide wheel is located in the middle of the third guide wheel and the fourth guide wheel, and the third guide wheel is located in the middle of the first guide wheel and the second guide wheel.

[0008] In order to improve the rigidity of the frame, the frame includes a base, both ends of the base are fixed with side plates in the vertical direction, support plates are connected between the side plates, and the main shaft is installed on the upper ends of the side plates through bearing seats.

[0009] In order to control the rotation speed of the main shaft, the motor is installed on the inner end surface of the side plate, and the output end of the motor extends to the outside of the side plate. A transmission wheel is connected to the output end of the motor, and a transmission wheel is also connected to the same end of the main shaft. The transmission wheels are connected by belts.

[0010] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0011] (1) By setting the guide wheels on the same plane, the guide wheels are distributed in pairs at the upper and lower ends of the main shaft, so that the cables are also distributed on the same plane, avoiding the cables from crossing, reducing the friction between the cables and the guide wheels, and facilitating the single twisting machine to drive the cables on the guide wheels to run when the cables are taken up. Compared with the existing pre-twisting machine, it avoids the use of an additional reduction gearbox to drive the guide wheels to rotate and drive the cables to run, thereby reducing the equipment cost;

[0012] (2) The diameter of the main shaft is significantly shortened compared to the rotating arm of the existing pre-twist machine, which reduces the volume and weight, reduces the equipment requirements of the motor, increases the speed and stability, and further improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a front view of the overall structure of the utility model;

[0015] Figure 2 It is a side view of the overall structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the installation structure of the guide wheel and the main shaft of the utility model;

[0017] Figure 4 It is a structural cross-sectional view of the main shaft of the utility model;

[0018] Figure 5 It is a top view of the main shaft of the utility model;

[0019] Figure 6 It is a cross-sectional view of the guide wheel of the utility model;

[0020] Figure 7 It is a front view of the frame of the utility model;

[0021] In the figure: 1. frame; 11. side panel; 12. base; 13. support plate; 2. bearing seat; 3. main shaft; 31. arc groove; 32. center hole; 33. support seat mounting groove; 4. support seat; 5. guide wheel; 501. rotating part; 502. wire guide part; 503. wire embedding groove; 51. first guide wheel; 52. second guide wheel; 53. third guide wheel; 54. fourth guide wheel; 6. cable; 7. motor; 8. transmission wheel. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0023] See also Figure 1 , 45. The utility model provides a technical solution: a rotary pre-twisting machine, including a frame 1, a main shaft 3 is connected to both ends of the frame 1 through a bearing seat 2, the diameter of the main shaft 3 is 140 mm, while the diameter of the rotating arm of the existing pre-twisting machine is 300 mm, and the diameter size is reduced, which reduces the volume and weight of the main shaft 3, improves the rotation speed and production efficiency, and a through-length center hole 32 is opened in the center of the main shaft 3, and two arc grooves 31 are respectively opened on the upper surface and the lower surface of the main shaft 3, and the arc grooves 31 on the upper surface and the arc grooves 31 on the lower surface are staggered. The arc grooves 31 are connected with the center hole 32, and guide wheels 5 are arranged in the four arc grooves 31. The guide wheels 5 are rotatably connected to the upper and lower parts of the main shaft 3 through the support seat 4, and the center hole 32 and the arc groove 31 are used to pass the cable 6 and wind the cable 6 onto the guide wheel 5. The cable 6 is tangent to the guide wheel 5, and the cable 6 is wound and distributed on the same plane. The main shaft 3 is driven to rotate by the motor 7. The guide wheel 5 distributed on the same plane makes the cable 6 also distributed on the same plane, thereby reducing the friction between the cable 6 and the guide wheel 5. The existing pre-twisting machine has two grooves on the circumference of the guide wheel. The cable will cross-wind on the guide wheel, increasing the friction between the guide wheel and the cable. In this way, a larger force is required to drive the cable to run. The wire-winding pulling force of the single twisting machine alone cannot drive the cable to run on the pre-twisting machine. Therefore, the existing pre-twisting machine is connected to a reduction box on the side of a guide wheel to drive the guide wheel to rotate and drive the cable to feed the wire. In the technical solution of this patent, the friction between the cable 6 and the guide wheel 5 is reduced. The wire-winding of the single twisting machine alone can realize the routing of the cable 6 on the guide wheel 5, thereby reducing the equipment cost.

[0024] like Figure 6 As shown, the guide wheel 5 includes a rotating part 501 and a wire part 502. The wire part 502 is formed on the circumference of the rotating part 501. The radial cross-section of the rotating part 501 is trapezoidal. The wire part 502 is also trapezoidal, and a single wire embedding groove 503 is opened on the outer end face of the wire part 502. The cable 6 is embedded in the wire embedding groove 503. At the same time, the single wire embedding groove 503 makes it convenient to distribute the cables 6 on the same plane. Compared with the cross-winding of the cables 6, the friction between the cables 6 and the guide wheel 5 is smaller.

[0025] like Figure 3As shown, the guide wheel 5 includes a first guide wheel 51, a second guide wheel 52, a third guide wheel 53 and a fourth guide wheel 54. The first guide wheel 51 and the second guide wheel 52 are both located at the lower end of the main shaft 3, and the third guide wheel 53 and the fourth guide wheel 54 are located at the upper end of the main shaft 3. The first guide wheel 51, the second guide wheel 52, the third guide wheel 53 and the fourth guide wheel 54 are on the same plane. The second guide wheel 52 is located in the middle of the third guide wheel 53 and the fourth guide wheel 54. The third guide wheel 53 is located between the first guide wheel 51 and the second guide wheel At the middle position of the wheel 52, the cable 6 enters from the center hole 32, is first wound around the first guide wheel 51 and led downward, and then wound around the second guide wheel 52. The cable 6 passes through the second guide wheel 52 and enters the center hole 32, and is then wound around the third guide wheel 53. The cable 6 enters the surface of the fourth guide wheel 54 from the third guide wheel 53, and finally the cable 6 is introduced from the fourth guide wheel 54 into the center hole 32 and led out from the other end of the main shaft 3. The winding path of the cable 6 is simple, and the friction between the cable 6 and the guide wheel 5 is small.

[0026] like Figure 7 As shown, the frame 1 includes a base 12, and side panels 11 are fixed at both ends of the base 12 in the vertical direction. A support plate 13 is connected between the side panels 11, and the support plate 13 is located above the base 12. A reinforcing rib plate is fixed at the angle between the base 12 and the side panels 11, and a reinforcing rib plate is also fixed at the angle between the support plate 13 and the side panels 11, thereby enhancing the rigidity and bearing capacity of the frame. The main shaft 3 is installed on the upper end of the side panel 11 through the bearing seat 2.

[0027] like Figure 1 and 2 As shown, the motor 7 is installed on the inner end surface of the side plate 11, and the output end of the motor 7 extends to the outside of the side plate 11. The output end of the motor 7 is connected to a transmission wheel 8, and the same end of the main shaft 3 is also connected to a transmission wheel 8. The transmission wheels 8 are connected by belts. The belt on the transmission wheel 8 drives the main shaft 3 to rotate, so that the cable 6 rotates while routing, and multiple cables are twisted together to form a twisting point, which achieves a pre-twisting effect and makes the subsequent twisting process stable.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotary pre-twisting machine, comprising a frame, with a main shaft connected to both ends of the frame through a bearing seat, characterized in that: A through-length center hole is provided at the center of the main shaft, and two arc grooves are respectively provided on the upper surface and the lower surface of the main shaft. The arc grooves on the upper surface and the arc grooves on the lower surface are alternately distributed, and the arc grooves are connected to the center hole. Four guide wheels are provided in the four arc grooves, and the guide wheels are rotatably connected to the upper and lower parts of the main shaft through support seats. The center hole and the arc groove are used to pass the cables and wind the cables onto the guide wheels. The cables in the center hole are tangent to the guide wheels, and the cables are wound and distributed on the same plane. The main shaft is driven to rotate by a motor.

2. The rotary pre-twisting machine according to claim 1, characterized in that: The guide wheel includes a rotating part and a wire part, the wire part is formed on the circumference of the rotating part, the radial cross section of the rotating part is trapezoidal, the wire part is trapezoidal, and a wire embedding groove is opened on the outer end surface of the wire part.

3. The rotary pre-twisting machine according to claim 1, characterized in that: The guide wheels include a first guide wheel, a second guide wheel, a third guide wheel and a fourth guide wheel, the first guide wheel and the second guide wheel are both located at the lower end of the main shaft, the third guide wheel and the fourth guide wheel are located at the upper end of the main shaft, the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are on the same plane, the second guide wheel is located in the middle of the third guide wheel and the fourth guide wheel, and the third guide wheel is located in the middle of the first guide wheel and the second guide wheel.

4. The rotary pre-twisting machine according to claim 1, characterized in that: The frame comprises a base, side plates are fixed at both ends of the base in the vertical direction, support plates are connected between the side plates, and the main shaft is installed on the upper ends of the side plates through bearing seats.

5. The rotary pre-twisting machine according to claim 1, characterized in that: The motor is mounted on the inner end surface of the side plate, and the output end of the motor extends outward from the side plate. A transmission wheel is connected to the output end of the motor, and a transmission wheel is also connected to the same end of the main shaft. The transmission wheels are connected by belts.

Images