A cable twisting mechanism suitable for multi-strand conductors

Abstract

This invention relates to the field of cable production equipment technology, specifically proposing a cable twisting mechanism suitable for multi-strand conductors. The mechanism includes a twisting machine body with two horizontally arranged twisting heads for twisting. A guide mechanism for guiding multiple conductors through the conductor insertion end of the twisting machine body is also installed. The guide mechanism includes a frame, two guide discs, a drive assembly, a guide frame, and a linkage assembly. This invention improves the forming quality of the twisting and bonding of the stranded wires, thereby improving the electrical and physical-mechanical properties of the subsequently stranded cable, increasing the DC resistance and signal transmission stability of the cable, enhancing bending resistance and overall strength, and extending the actual service life of the cable, thus ensuring the overall quality and reliability of cable production.

Description

Technical Field

[0001] This invention relates to the field of cable production equipment technology, and specifically proposes a cable twisting mechanism suitable for multi-strand conductors. Background Technology

[0002] Twisted conductor cables are made of multiple strands of wires twisted together, and each strand of wire is made of multiple strands of wires twisted together. That is, they are manufactured by a double-layer stranding process of first bundling and then re-stranding. During bundling, a bundling machine is usually used to pre-strand multiple wires into a bundle. However, in the production of high-flexibility conductor cables, the bundle usually consists of dozens or even hundreds of extremely fine wires. For the processing of this type of high-flexibility conductor cable, a wire twisting machine is generally used to efficiently and quickly gather many extremely fine wires and lightly twist them into a long-pitch bundle, realizing pre-stranding treatment. This serves as a pre-processing step before the final stranding and forming with the stranding machine, thereby improving the overall production efficiency.

[0003] Wire twisting machines use a twisting method similar to "twisting rope" to gather wires into bundles, and basically employ two horizontally opposed belt structures for twisting and shaping. However, existing wire twisting machines have fundamental flaws. During the twisting process between the two belts, the twisting and gathering are highly random and lack regularity. Furthermore, the friction generated by the belt twisting only acts directly on the outer layer of wires in contact with it within the bundle, transmitting rotational torque and tightening force layer by layer from the outside in. The inward force gradually weakens, resulting in an uneven pre-twisted state where the bundle cross-section is tighter on the outside and looser on the inside. Additionally, the inner and outer layers of wires in the bundle... The problem of uneven stress exists, and the continuous twisting and bonding also causes the conductor to accumulate torsional stress, resulting in localized stress concentration. In addition, existing wire twisting machines are basically equipped with corresponding wire separators or guides at the conductor entry end, so that each conductor is fed in according to a preset position. Although the wire separator is a necessary structure to avoid conductor tangling, it also restricts the distribution position of each conductor, which further amplifies the defects of the wire twisting machine itself. After the bundled wires with the above defects are finally stranded into cables by a stranding machine, these defects will still be retained and inherited, causing the following adverse effects on the cable.

[0004] 1. Decreased electrical performance leads to increased and unstable DC resistance, which in turn reduces the performance of high-frequency signal transmission and causes signal attenuation.

[0005] 2. Decreased physical and mechanical properties result in poor roundness and uneven dimensions of the cable cross-section, affecting subsequent stranding and insulation layer processing, reduced bending resistance, increased brittleness, easy fatigue fracture, and shortened service life.

[0006] Therefore, in the cable production process, especially in the manufacture of high-end flexible cables, robot cables, and automotive cables, reducing the adverse effects of defects such as external tightness and internal looseness in the pre-stretching process of cable bundles can effectively improve the overall quality and reliability of cable production. Summary of the Invention

[0007] To address the aforementioned problems, the present invention provides a cable twisting mechanism suitable for multi-strand conductors, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention employs the following technical solution: a cable twisting mechanism suitable for multi-strand conductors, comprising a twisting machine body with two twisting heads horizontally arranged on it for twisting; a guide mechanism for guiding multiple conductors through is fitted at the conductor insertion end of the twisting machine body; the guide mechanism includes a frame, two guide discs, a drive assembly, a guide frame, and a linkage assembly; a fixed base is fixed on the frame, and a sliding base is horizontally slidably mounted thereon; the two guide discs are arranged horizontally coaxially; one guide disc is fixed on the fixed base, and the other guide disc is rotatably mounted on the sliding base; multiple guide holes are distributed circumferentially on the guide discs; a cable bundle tube arranged coaxially with the guide discs is fixed on the sliding base. Multiple wires pass sequentially through the guide holes of two guide discs and are gathered through the wire bundling cylinder to the wire insertion end of the wire twisting machine body; the drive assembly is assembled between the two guide discs to drive the rotating guide disc to rotate back and forth in a multi-intermittent manner; the guide frame is fixed on the mechanism frame; the linkage assembly is assembled between the guide frame and the rotating guide disc; under the drive of the drive assembly, when the rotating guide disc rotates intermittently in the forward direction, the guide frame drives the sliding seat to gradually slide away from the fixed seat through the linkage assembly, and the multiple wires are pre-twisted; when it rotates intermittently in the reverse direction, it drives the sliding seat to gradually slide closer to the fixed seat; during the forward and reverse rotation, the multiple wires are dynamically allocated and adjusted to enter the space of the wire insertion end.

[0009] Preferably, the guide disk has a circular disc structure; multiple guide sleeves arranged circumferentially are detachably installed on the guide disk, and the inner cavity of the guide sleeve is a guide hole.

[0010] Preferably, the guide frame has a track hole, and the linkage component moves along the track hole.

[0011] Preferably, the linkage component includes an ear plate fixed on a rotatably mounted guide plate, a connecting shaft rotatably mounted on the ear plate with its axis parallel to the central axis of the guide plate, a slide rod rotatably mounted on one end of the connecting shaft with its axis perpendicular to the guide plate, a limit sleeve being keyed and slidably mounted on the slide rod, and the limit sleeve moving along the track hole.

[0012] Preferably, the drive assembly includes a drive motor that is horizontally fixed within the ring of a fixedly mounted guide disk via a motor mount, and a sliding shaft is fixed on the output shaft of the drive motor; a bushing is fixed within the ring of the rotatably mounted guide disk, and the sliding shaft is slidably mounted within the bushing in a keyed fit.

[0013] Preferably, the cable bundle has a trumpet-shaped structure, with the larger end of the cable bundle facing the guide plate; the bushing extends into the cable bundle, and a frustum cylinder is fixedly fitted on the bushing; the wire passes through the gap between the frustum cylinder and the cable bundle.

[0014] Preferably, the limiting sleeve is detachably equipped with retaining rings at both ends, and the two retaining rings are in contact with the two sides of the guide frame.

[0015] Preferably, the guide plate is an axially split-half assembly structure; the guide plate has multiple positioning holes distributed circumferentially, and multiple guide sleeves are installed in the multiple positioning holes one by one.

[0016] Preferably, the guide plate has an annular lubrication channel, the positioning hole is located in the lubrication channel, and the guide sleeve has multiple lubrication holes that communicate with the lubrication channel.

[0017] Preferably, the trajectory hole is parabolic in shape.

[0018] The above technical solution has the following advantages or beneficial effects: 1. The present invention provides a cable twisting mechanism suitable for multi-strand conductors. A guide mechanism is installed at the conductor insertion end of the twisting machine body to replace the existing wire separating plate or guide comb. The guide mechanism adopts a double guide plate design. The fixed guide plate is used as the wire separating guide reference. The drive component drives the rotating guide plate to rotate back and forth in an intermittent manner at a set angle, so as to perform regular pre-twisting of the wire bundle to improve the regularity of subsequent twisting and aggregation of the twisting machine body. At the same time, it enables each conductor to dynamically allocate and adjust the spatial position when twisting in an intermittent direction, which changes the relatively fixed position of the conductor after wire separation in the existing twisting machine, avoids the outside being tight and the inside being loose, enhances the consistency of the tightness of the inner and outer conductors and the uniformity of the wire bundle cross-section distribution, and improves the overall roundness.

[0019] 2. This invention provides a cable twisting mechanism suitable for multi-strand conductors. The reciprocating rotation in both directions keeps the wire bundle in an intermittent, discrete, small-angle loose state during the twisting and bonding process. This changes the working state of the existing twisting machine, which is continuously twisting in one direction. It can intermittently release the torsional stress accumulated by the continuous twisting of the conductor, reduce the stress concentration problem of the conductor, especially the conductors distributed in the outer layer, avoid fatigue damage during the twisting process, promote the self-adjustment and interlocking of the conductor position, and further improve the overall tightness of the wire bundle after pre-twisting and the uniformity of the conductor distribution.

[0020] 3. The present invention provides a cable twisting mechanism suitable for multi-strand conductors. During the process of the drive component driving the rotating guide plate to rotate back and forth, the guide frame drives the rotating guide plate to gradually move away from the fixed guide plate and gradually move closer to the reset through the linkage component. The synchronous movement away creates a buffer space for the twisting and direction change of each conductor, reduces the fluctuation and resistance of the conductor, and avoids the conductor being pulled off or damaged.

[0021] 4. This invention provides a cable twisting mechanism suitable for multi-strand conductors. The guide disc uses a detachable and replaceable guide sleeve instead of a guide hole, and greatly reduces the resistance of the wire passing through through passive lubrication and active lubrication, avoiding fraying and damage to the wire.

[0022] 5. In summary, by improving the molding quality of the twisting and polymerization of the wire bundles, the electrical and physical-mechanical properties of the subsequent stranded cable products can be improved, as well as the DC resistance and signal transmission stability of the cable, the bending resistance and overall strength can be enhanced, and the actual service life of the cable can be increased, thereby ensuring the overall quality and reliability of cable production. Attached Figure Description

[0023] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0024] Figure 1 This is a three-dimensional diagram of a cable twisting mechanism applicable to multi-strand conductors.

[0025] Figure 2 This is a three-dimensional structural diagram of the guiding mechanism.

[0026] Figure 3 This is a front view of the guiding mechanism.

[0027] Figure 4 It is a three-dimensional structural diagram of the mechanism frame.

[0028] Figure 5 It is a three-dimensional assembly sectional view of the drive component and the two guide disks.

[0029] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0030] Figure 7 It is a 3D diagram of the half-and-half structure of the boot disk.

[0031] Figure 8 This is a 3D structural diagram of the linkage components.

[0032] Figure 9This is a diagram showing the pre-twisted state of the wire harness between the two guide discs when it is rotated forward to 90°.

[0033] In the diagram: 1. Wire twisting machine body; 11. Frame; 12. Twisting head; 2. Mechanism frame; 21. Fixed seat; 22. Sliding seat; 23. Rotary bearing; 3. Guide plate; 31. Lubrication channel; 32. Positioning hole; 33. Guide sleeve; 331. Lubrication hole; 34. Sealing ring; 4. Wire bundle tube; 41. Support seat; 5. Drive assembly; 51. Motor seat; 52. Drive motor; 53. Sliding shaft; 54. Bushing seat; 55. Bushing tube; 56. Frustum cylinder; 6. Guide frame; 61. Track hole; 7. Linkage assembly; 71. Ear plate; 72. Connecting shaft; 73. Rotating seat; 74. Slide rod; 75. Limiting slide sleeve; 751. Retaining ring. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 As shown, a cable twisting mechanism suitable for multi-strand conductors includes a twisting machine body 1. In this embodiment, the twisting machine body 1 is the equipment body, which includes a frame 11. Two twisting heads 12 are horizontally and symmetrically mounted on the frame 11. The two twisting heads 12 are actuators that cooperate to twist the wire. Each twisting head 12 includes a belt for twisting and multiple pulleys (including a driving pulley, a driven pulley, and a tensioning pulley) that cooperate to drive the belt. The two twisting heads 12 are arranged at a V-shaped angle. The corner area is a twisting cavity. The V-shaped angle can be a fixed angle or an adjustable angle. In this embodiment, the two twisting heads 12 are arranged in a fixed V-shaped angle. In addition, the frame 11 is also equipped with a distance adjustment mechanism for adjusting the distance between the two twisting heads 12 and an angle adjustment mechanism for adjusting the symmetrical deflection angle of the two twisting heads 12. The wire bundle composed of multiple wires will enter from the wide opening and exit from the narrow opening of the V-shaped twisting cavity, so that the wire bundle can complete the gradual tightening and twisting. The wide opening end of the twisting cavity is the wire insertion end, and the narrow opening end is the wire exit end.

[0037] The spacing adjustment mechanism adjusts the twisting force by changing the distance between the two twisting heads 12. Driven by the angle adjustment mechanism, the two twisting heads 12 can be adjusted from a horizontal state to a symmetrical deflection state. The two twisting heads 12 are inclined from bottom to top and from top to bottom relative to the direction of the conductor's entry and exit, respectively. The frictional force of the two belts acting on the wire harness can be equivalently decomposed into an axial component along the conductor's axis and a tangential component acting on the outer circle of the conductor. The axial component is in the same direction as the wire harness's forward direction and is used to assist in traction and conveying the wire harness. The tangential component generates a twisting torque, and the twisting torques of the two belts are superimposed in the same direction, causing the wire harness to twist and coalesce into a bundle. By adjusting the tilt angle, the ratio of traction force to twisting torque can be adjusted. It should be emphasized that the structural composition of the wire twisting machine body 1 is disclosed in the prior art. The above description of the wire twisting machine body 1 is based on the prior art. More specific structural components and assembly relationships of the wire twisting machine body 1 will not be elaborated here.

[0038] like Figure 1 As shown, the wire insertion end of the wire twisting machine body 1 is fitted with a guide mechanism for guiding multiple wires through. In this invention, the guide mechanism replaces the existing guide structures such as wire separators or guide combs. It should be added that a guide structure for guiding the bundle of wires through is also installed at the wire exit end of the wire twisting machine body 1. This guide structure is a conventional guide structure installed on existing wire twisting machines, which is not shown in the figure. Specifically, it can be a cylindrical gathering mold.

[0039] like Figure 2 , Figure 3 and Figure 4 As shown, the guiding mechanism includes a frame 2, two guide discs 3, a drive assembly 5, a guide frame 6, and a linkage assembly 7. The frame 2 is fixed to the frame 11 by bolts. A fixed seat 21 and a slide rail are welded and fixed to the upper end face of the frame 2. A sliding seat 22 is horizontally slidably installed on the slide rail. The sliding seat 22 can slide along the wire harness traction and conveying direction. A rotary bearing 23 is welded and fixed to the sliding seat 22. The two guide discs 3 are arranged horizontally and coaxially. One guide disc 3 is fixed to the fixed seat 21 by bolts, and the other guide disc 3 is rotatably installed on the sliding seat 22 through the rotary bearing 23.

[0040] like Figure 5 , Figure 6 and Figure 7As shown, the guide disk 3 is annular in shape and is an axially split structure. An annular lubrication channel 31 is centrally located within the guide disk 3. Multiple positioning holes 32 are evenly distributed circumferentially within the lubrication channel 31, penetrating the guide disk 3 axially. The positioning holes 32 are stepped holes on both halves of the guide disk 3. A flexible lubricating oil pipe can be fixedly connected to one half of the guide disk 3, allowing lubricating oil to be added to the lubrication channel 31. Existing and specialized cable conductor forming oil can be used as the lubricating oil. To improve the sealing of the lubrication channel 31, two annular sealing grooves are centrally located on the guide disk 3, distributed inside and outside the annulus of the lubrication channel 31. Rubber sealing rings 34 of appropriate size can be filled into the sealing grooves, achieving sealing after the guide disk 3 is assembled. A guide sleeve 33 is installed in each positioning hole 32 on the guide disk 3. The guide sleeve 33 consists of two... The cylindrical shaft structure with a shoulder at one end allows the guide sleeve 33 to be embedded and fixed in the positioning hole 32 after the guide disc 3 is assembled. It is important to note that the positioning hole 32 is machined with high precision to ensure the sealing and stability of the assembly and fit between the guide sleeve 33 and the guide sleeve 33. In addition, the guide sleeve 33 can be made of a high-hardness, low-friction material, such as zirconia ceramic or alumina ceramic. The inner cavity of the guide sleeve 33 is mirror-polished and serves as the guide hole for the guide wire to pass through. The two ends of the guide hole are enlarged. The guide sleeve 33 also has four lubrication holes 331 evenly distributed around the circumference. The lubrication holes 331 are connected to the lubrication channel 31. The lubricant can continuously overflow into the guide hole in a small amount through the lubrication holes 331. The guide sleeve 33 improves its wear resistance through material selection and greatly reduces the resistance of the wire passing through through passive lubrication by polishing and active lubrication by lubricant immersion, avoiding scratching and damage to the wire.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, a cable bundle 4 is also installed in conjunction with the guide plate 3. A support base 41 is welded onto the cable bundle 4, and the support base 41 is fixed to the sliding seat 22 by bolts. The cable bundle 4 has a trumpet-shaped structure, and the large end of the cable bundle 4 faces the guide plate 3. The cable bundle 4 is arranged coaxially with the two guide plates 3. The fixed guide plate 3, the rotating guide plate 3, and the cable bundle 4 are distributed in sequence from far to near the wire insertion end in the direction of cable traction and conveying, and the cable bundle 4 is directly opposite the wire insertion end.

[0042] like Figure 2 , Figure 3 and Figure 5As shown, the drive assembly 5 is assembled between two guide disks 3, and is used to drive the rotatably mounted guide disks 3 to rotate back and forth in a multi-intermittent manner. The drive assembly 5 includes a drive motor 52 that is horizontally fixed in the ring of the fixedly mounted guide disk 3 via a motor base 51. A sliding shaft 53 is fixed to the output shaft of the drive motor 52 by screws. A bushing 55 is coaxially mounted on the rotatably mounted guide disk 3. A bushing seat 54 is welded onto the bushing 55. The bushing seat 54 is fixed in the ring of the rotatably mounted guide disk 3 by bolts. The sliding shaft 53 is slidably mounted in the bushing 55 with a key fit. The bushing 55 extends into the cable bundle 4. A frustum cylinder 56 is fitted onto the bushing 55 and fixed by screws. The wire can pass through the gap between the frustum cylinder 56 and the cable bundle 4. The outer wall of the frustum cylinder 56 and the inner wall of the cable bundle 4 are both polished. It should be added that, in the drive assembly 5, the drive motor 52 can be an existing servo geared motor with a built-in brake, which can achieve low-speed drive, output large torque to meet the driving force requirements, and also perform precise braking and self-locking.

[0043] like Figure 2 and Figure 3 As shown, the guide frame 6 is fixed to the mechanism frame 2 by bolts. The guide frame 6 has a parabolic trajectory hole 61. Figure 3 As shown, the parabola corresponding to the trajectory hole 61 extends from left to right and from bottom to top, and the slope of each point in the extension direction gradually increases. That is, when moving to the right along the trajectory hole 61, the more you move to the left end, the greater the corresponding horizontal displacement change component under the same unit vertical displacement change component.

[0044] like Figure 2 , Figure 3 and Figure 8 As shown, the linkage component 7 is assembled between the guide frame 6 and the rotatably mounted guide disk 3. The linkage component 7 includes an ear plate 71 fixed to the rotatably mounted guide disk 3 by bolts. A connecting shaft 72 is rotatably mounted on the ear plate 71, with its axis parallel to the central axis of the guide disk 3. A rotating seat 73 is horizontally welded to one end of the connecting shaft 72. A sliding rod 74 is horizontally rotatably mounted on the rotating seat 73. The sliding rod 74 is perpendicular to the connecting shaft 72. A limiting sleeve 75 is keyed and slidably mounted on the sliding rod 74. The limiting sleeve 75 moves along the track hole 61. To achieve axial limiting, retaining rings 751 are threadedly mounted at both ends of the limiting sleeve 75. The two retaining rings 751 are in corresponding contact with the two sides of the guide frame 6. The limiting sleeve 75 can rotate as a whole with the sliding rod 74, so that the limiting sleeve 75 moves in a rolling manner in the track hole 61 to reduce the moving friction. To further reduce the friction, the contact surfaces of the retaining rings 751 and the guide frame 6 are polished.

[0045] Before twisting the wire harness using the wire twisting machine body 1, the wire twisting machine body 1 is first adjusted to ensure the distance and relative deflection angle of the two twisting heads 12 are properly aligned and ready for operation. Subsequently, the wires are threaded along the traction and conveying path. To facilitate the threading operation, in the initial state, the two guide discs 3 are in close contact, and the guide sleeves 33 on the two guide discs 3 are aligned one by one. During threading, each wire passes through the aligned guide sleeves 33 on the two guide discs 3 in sequence. The wires that pass through all the guide sleeves 33 on the guide discs 3 form a wire harness that passes through the gap between the wire harness cylinder 4 and the frustum cylinder 56, and then passes through the twisting cavity and the guide structure located at the wire exit end in sequence, and is then traction and conveyed by the traction device. The fixedly installed guide plate 3 can serve as a reference for guiding the wires to pass through, and can evenly distribute multiple wires around the guide plate 3, thereby ensuring that the tension of multiple wires remains basically consistent after passing through the fixedly installed guide plate 3; the combination of the wire bundle 4 and the frustum cylinder 56 can initially gather and concentrate the relatively dispersed wire bundles, and can form a guiding constraint.

[0046] It should be added that the forward and reverse rotation of the guide disk 3 is related to the initial state and the twisting direction of the twisting machine body 1. If the line of sight is directed towards the traction and conveying direction of the wire harness, the twisting torque direction of the two twisting heads 12 on the wire harness is clockwise. When the rotating guide disk 3 rotates clockwise from the initial position, it is a forward rotation. In this embodiment, the maximum angle of forward rotation is 90° to avoid the wires being twisted too much between the two guide disks 3, which would affect the normal traction and conveying. When the forward rotation reaches the maximum angle, it rotates in the opposite direction to reset, which is the reverse rotation process. The drive motor 52 rotates back and forth intermittently, with each intermittent rotation being 18°. That is, both forward and reverse rotations are completed in five intermittent rotations with an interval of 1 second.

[0047] During the twisting process, the twisting machine body 1 starts, and the drive motor 52 starts synchronously. Simultaneously, the wire harness is pulled at a uniform speed, which can be pre-set. The twisting machine body 1 simultaneously provides auxiliary traction and transport to the wire harness while twisting and bonding. Under the intermittent drive of the drive motor 52, the drive motor 52, through the sliding shaft 53 and the bushing 55, drives the rotating guide plate 3 to rotate. The ear plate 71 rotates synchronously with the guide plate 3 and, through the connecting shaft 72, drives the slide rod 74 to slide along the limiting sleeve 75. Under the constraint of the track hole 61, the limiting sleeve 75 is forced to move along the track hole 61. Thus, during the intermittent forward rotation, the guide frame 6, through the linkage component 7, causes the guide plate 3 to drive the sliding seat 22 to slide gradually away from the fixed seat 21. Because the rotating guide plate 3 rotates forward, and the other guide plate 3 remains fixed, the guide sleeves 33 originally aligned on the two guide plates 3 are misaligned by the same angle. Figure 9As shown, multiple wires are pre-twisted between two guide discs 3. The pre-twisting angle gradually increases with the increase of the forward rotation angle, and the deflection amplitude of each wire is consistent, that is, the tension remains consistent. This results in the relatively regular pre-twisting of multiple wires after they pass through the rotating guide discs 3. In contrast, in existing wire twisting machines, the wires are randomly twisted and aggregated by friction after being separated by the wire separating plate, resulting in poor regularity of the initial aggregation of the wires at the insertion end. This invention improves the regularity of the subsequent twisting and aggregation of the wire twisting machine body 1 by performing regular pre-twisting before entering the twisting cavity.

[0048] The purpose of gradually moving the two guide discs 3 apart during forward rotation is to create a buffer space for the twisting and changing direction of each wire and to reduce the fluctuation of the wire. Under the same twisting and changing direction angle, the larger the distance between the two guide discs 3, the more the wire tends to be parallel to the axis of the guide disc 3, the smaller the changing direction angle of the wire at the guide sleeve 33 on the two guide discs 3, the smaller the contact force between the wire and the guide sleeve 33, and the smaller the corresponding friction force, thereby reducing the resistance to passage and preventing the wire from being pulled off or damaged. In addition, the trajectory hole 61 adopts a parabolic design, which allows the distance between the two guide discs 3 to be increased more quickly during the initial forward rotation.

[0049] If the guide disk 3 is constantly rotating intermittently in the forward direction, the total twist angle of the wires between the two guide disks 3 will continue to increase, which will prevent normal traction and transportation, and eventually the wires will break. Therefore, the reverse rotation is the reset process. When rotating in the reverse direction, the rotating guide disk 3 is reset in the reverse direction, while the sliding seat 22 slides towards the fixed seat 21. Subsequently, the forward and reverse rotations are repeated.

[0050] It should be noted that although the reversal process involves loosening the pre-twisted wires and the wire bundle during the twisting process, the wire twisting machine body 1 continuously twists the wire bundle, and the angle of loosening does not affect the twisting shape. Conversely, whether in forward or reverse rotation, each wire is always in a dynamic process of intermittent direction change, which can dynamically adjust and distribute the spatial position of each wire after entering the twisting chamber, and then actively adjust and intervene in the contact position between each wire and the twisting head 12. This changes the relatively fixed position of the wires after separation in existing wire twisting machines, and to a certain extent compensates for the shortcomings of existing wire twisting machines. The inherent defects of twisting from the outside in enhance the consistency of the tightness of the inner and outer conductors and the uniformity of the cross-sectional distribution of the wire harness, improving the overall roundness. In addition, the reciprocating rotation in both directions keeps the wire harness in an intermittent, discrete, small-angle loose state during the twisting and bonding process. This changes the working state of the existing wire twisting machine, which is continuously twisting in one direction. It can intermittently release the torsional stress accumulated by the continuous twisting of the conductors, reduce the stress concentration problem of the conductors, especially the conductors distributed in the outer layer, avoid fatigue damage during the twisting process, promote the self-adjustment and interlocking of the conductor position, and further improve the overall tightness of the wire harness after pre-twisting and the uniformity of the conductor distribution.

[0051] By improving the molding quality of the twisting and polymerization of the wire bundles, the electrical and physical-mechanical properties of the subsequent stranded cable products are improved, the DC resistance and signal transmission stability of the cable are increased, the bending resistance and overall strength are enhanced, and the actual service life of the cable is increased, so as to ensure the overall quality and reliability of cable production.

[0052] It should be emphasized that when the wire twisting machine body 1 is used in conjunction with the guiding mechanism provided by the present invention, it is specifically suitable for twisting cables with the number of conductors in a single strand bundle being within the number of guide sleeves 33 on the guide plate 3, but this does not constitute a constraint on the applicable processing range of the wire twisting machine body 1.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A cable twisting mechanism suitable for multi-strand conductors, comprising a twisting machine body, on which two twisting heads are horizontally arranged to cooperate in twisting the wire, characterized in that, The wire-passing end of the wire twisting machine body is fitted with a guide mechanism for guiding multiple wires through; the guide mechanism includes: The frame has a fixed base and a sliding base that is horizontally slidably mounted on it. Two guide discs are arranged horizontally and coaxially; one guide disc is fixed on the fixed base, and the other guide disc is rotatably mounted on the sliding base; multiple guide holes are distributed circumferentially on the guide discs; a wire bundle tube arranged coaxially with the guide discs is fixed on the sliding base; multiple wires pass through the guide holes of the two guide discs in sequence and pass through the wire bundle tube to be gathered to the wire entry end of the wire twisting machine body; The drive assembly, assembled between two guide disks, is used to drive the rotating guide disks to rotate back and forth in a multi-intermittent manner. The guide frame is fixed to the mechanism frame; The linkage component is assembled between the guide frame and the rotatably mounted guide plate. Driven by the drive component, when the rotatably mounted guide plate rotates intermittently in the forward direction, the guide frame drives the sliding seat to gradually slide away from the fixed seat through the linkage component, and multiple wires are pre-twisted. When it rotates intermittently in the reverse direction, it drives the sliding seat to gradually slide closer to the fixed seat. During the forward and reverse rotation, the multiple wires are dynamically allocated and adjusted to enter the space of the wire insertion end. The guide frame has a track hole, and the linkage component moves along the track hole; The linkage component includes an ear plate fixed on a rotatably mounted guide plate. A connecting shaft is rotatably mounted on the ear plate, with its axis parallel to the central axis of the guide plate. A slide rod is rotatably mounted on one end of the connecting shaft, with its axis perpendicular to the slide rod. A limit sleeve is key-fitted and slidably mounted on the slide rod, and the limit sleeve moves along the track hole. The drive assembly includes a drive motor that is horizontally fixed within the ring of a fixedly mounted guide disk via a motor mount, and a sliding shaft that is fixed on the output shaft of the drive motor; a bushing is fixed within the ring of the rotatably mounted guide disk, and the sliding shaft is slidably mounted within the bushing in a keyed fit.

2. The cable twisting mechanism applicable to multi-strand conductors according to claim 1, characterized in that: The guide plate has a circular disc structure; multiple guide sleeves are detachably installed on the guide plate and arranged circumferentially, with the inner cavity of the guide sleeve being a guide hole.

3. A cable twisting mechanism suitable for multi-strand conductors according to claim 1, characterized in that: The cable bundle has a trumpet-shaped structure, with the larger end of the cable bundle facing the guide plate; the bushing extends into the cable bundle, and a frustum cylinder is fixedly fitted on the bushing; the wire passes through the gap between the frustum cylinder and the cable bundle.

4. A cable twisting mechanism suitable for multi-strand conductors according to claim 1, characterized in that: The limiting sleeve has retaining rings detachably installed at both ends, and the two retaining rings make corresponding contact with the two sides of the guide frame.

5. A cable twisting mechanism suitable for multi-strand conductors according to claim 2, characterized in that: The guide plate is an axially split-half assembly structure; the guide plate has multiple positioning holes distributed circumferentially, and multiple guide sleeves are installed in the multiple positioning holes one by one.

6. A cable twisting mechanism suitable for multi-strand conductors according to claim 5, characterized in that: The guide plate has an annular lubrication channel, the positioning hole is located in the lubrication channel, and the guide sleeve has multiple lubrication holes that communicate with the lubrication channel.

7. A cable twisting mechanism suitable for multi-strand conductors according to claim 1, characterized in that: The trajectory hole is parabolic in shape.

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