A wear-resistant cable and stranding device for a torsion-resistant, tension-resistant, cold-resistant drag chain

Abstract

The application discloses a wear-resistant cable for a torsion-resistant, tension-resistant and cold-resistant drag chain and a stranding device, and relates to the field of drag chain cables. The wear-resistant cable comprises a sheath and a plurality of cable core units which are distributed in the sheath at intervals. The cable core units are formed by stranding a plurality of core wires and a first tension-resistant member. The core wires are formed by stranding at least two wire bundles. The wire bundles are formed by stranding a conductor and a second tension-resistant member. The periphery of the core wires is covered with an insulating sleeve. The sheath is a thermoplastic polyurethane sheath. The conductor is a super-6 type soft conductor. The application helps to improve the tension resistance and bending resistance of the cable.

Description

TECHNICAL FIELD

[0001] The application relates to the field of drag chain cables, in particular to a wear-resistant cable for a torsion-resistant, tension-resistant and cold-resistant drag chain and a stranding device. BACKGROUND

[0002] A drag chain cable is a high-flexibility special cable that can move back and forth with a drag chain without being easily worn, and is also commonly referred to as a towing cable.

[0003] The conventional drag chain cable will generate a pulling force on the core wire under small bending radius and high-speed operation, thereby causing the core wire to break. That is, the existing drag chain cable needs to be improved in terms of tensile resistance and bending resistance. SUMMARY

[0004] In order to improve the tensile resistance and bending resistance of the cable, the application provides a wear-resistant cable for a torsion-resistant, tension-resistant and cold-resistant drag chain and a stranding device.

[0005] The wear-resistant cable for a torsion-resistant, tension-resistant and cold-resistant drag chain and the stranding device provided by the application adopt the following technical solutions:

[0006] A wear-resistant cable for a torsion-resistant, tension-resistant and cold-resistant drag chain comprises a sheath and a plurality of cable core units spaced apart in the sheath, the cable core units are formed by stranding a plurality of core wires and a first tensile member, the core wires are formed by stranding at least two strands, the strands are formed by stranding a conductor and a second tensile member, the periphery of the core wires is covered with an insulating sleeve, the sheath is a thermoplastic polyurethane sheath, and the conductor is a super-6 soft conductor.

[0007] By adopting the above technical solutions, the conductor is a super-6 soft conductor, the softness of the conductor is higher, the conductor can adapt to small bending radius during the drag chain process, the conductor and the second tensile member are stranded to form the strands, the tensile resistance is stronger, the core wires are stranded in strands to form the cable core units, the problem of difficult sliding between layers during the drag chain process is solved, and the risk of core wire breakage is reduced; the plurality of cable core units are spaced apart, that is, there is no problem of core wire breakage due to the release of torsional stress of the innermost layer caused by the small pitch structure required to meet the performance of the drag chain; the sheath is a thermoplastic polyurethane sheath, so that the cable has excellent properties such as wear resistance and cold resistance, that is, the tensile resistance and bending resistance of the cable in the application are significantly improved.

[0008] Preferably, a stranding tensile PP rope is arranged between all the cable core units.

[0009] Preferably, the first tensile member and the second tensile member are both Kevlar filaments.

[0010] Preferably, the insulating sleeve is a synthetic rubber.

[0011] The application discloses a twisting device for twisting a wire harness into a core wire, comprising a support frame, a pay-off reel rotatably arranged on the support frame, a guide mechanism for guiding the wire harness and a twisting mechanism; a plurality of pay-off rollers are arranged on the pay-off reel in a circumferential direction; the guide mechanism comprises a first guide wheel set and a second guide wheel set; a mounting disc is further arranged on the support frame and coaxially rotates with the pay-off reel; the first guide wheel set is identical in number to the pay-off rollers and one-to-one corresponding; the first guide wheel set is arranged on the mounting disc; the first guide wheel set comprises two guide wheels, and a conveying gap for guiding and conveying the wire harness is formed between the two guide wheels; the number of all the second guide wheel sets is identical to that of the pay-off rollers and one-to-one corresponding; the second guide wheel set is located on a side close to the twisting mechanism; and the surrounding radius of all the second guide wheel sets is smaller than that of all the first guide wheel sets.

[0012] By adopting the technical scheme, the wire harness is wound on the corresponding pay-off roller, the wire harness is guided by the first guide set and the second guide wheel, so that the wire harness is twisted at the twisting mechanism, and in the process, the front end is provided with a traction mechanism to pull the twisted core wire; and after the core wire of a certain length is twisted, cutting operation is performed to form the core wire of the required length.

[0013] Preferably, a sliding groove is arranged on the mounting disc in a radial direction, a sliding plate is slidably connected in the sliding groove, a compression spring is arranged on the mounting disc in the sliding groove, one end of the compression spring is connected with the sliding plate, and the other end of the compression spring is connected with the bottom wall of the sliding groove; and the first guide wheel set is mounted on the sliding plate.

[0014] By adopting the technical scheme, in actual application, after the core wire of a certain length is twisted, the traction mechanism stops the traction action, and the driving motor stops driving the pay-off reel to rotate, and then the core wire is cut; after the traction mechanism stops traction, due to the rolling inertia of the pay-off roller and the guide wheel, the wire harness continues to be conveyed, that is, the wire harness close to the twisting mechanism is in a slack state, if the wire harness is slack, the wire harness close to the side of the twisting mechanism cannot be immediately twisted when the pay-off reel is rotated in subsequent traction, that is, the twisting effect is reduced, and the fresh twisting quality is affected; in the application, the sliding plate can be slid by the compression spring, so that the wire harness is always in a taut state, and the quality of the core wire is ensured.

[0015] Preferably, the mounting disc is provided with two supporting plates symmetrically arranged, a connecting shaft is rotatably connected between the two supporting plates, the guide wheel is rotatably connected to the connecting shaft, the mounting disc is provided with a rotating assembly for driving the guide wheel to rotate, and a rotating direction of the guide wheel driven by the rotating assembly is opposite to a rotating direction of the guide wheel in the traction state; a plurality of movable openings are arranged in an array on a circumferential side of the guide wheel, a push plate is hingedly connected to the guide wheel in the movable openings, and a driving assembly is arranged in the guide wheel for driving the push plate to reciprocatingly rotate outwardly; in an initial state, the push plate is accommodated in the movable openings, when the rotating assembly drives the guide wheel to rotate, the driving assembly drives the push plate to reciprocatingly rotate.

[0016] Through the above technical scheme, under the traction, the guide wheel rotates in cooperation with the conveying of the wire harness, when the traction ends, the wire harness is relaxed, at this time, the rotating assembly drives the guide wheel to reversely rotate, and the driving assembly drives the push plate to reciprocatingly rotate, when the push plate extends outside the guide wheel, the push plate contacts the surface of the wire harness and drives the wire harness to be conveyed to the reel, that is, the friction between the push plate and the wire harness is increased, so that the wire harness is conveniently conveyed, through the conveying of the wire harness, the wire harness close to the twisting mechanism is in a taut state, and the twisting quality of the core wire is improved.

[0017] Preferably, a sleeve is formed on a side edge of the guide wheel, the sleeve is sleeved on the connecting shaft and rotatably cooperates with the connecting shaft; the rotating assembly comprises a rotating motor, a first pulley, a second pulley and a belt, the first pulley is coaxially fixed on an output shaft of the rotating motor, the second pulley is coaxially fixed on the sleeve, and the belt is wound on the first pulley and the second pulley.

[0018] Through the above technical scheme, in the wire harness traction and twisting process, the guide wheel rotates with the movement of the wire harness, at this time, the rotating motor is in a shutdown state; when the wire harness is tensioned, the rotating motor is started, and the guide wheel is reversely rotated through the first pulley, the second pulley and the belt.

[0019] Preferably, a ratchet portion is formed on one of the sleeves, a ring plate is fixedly connected to the connecting shaft, a pawl is hingedly connected to the ring plate through a torsion spring; the driving assembly comprises a cam and an abutting rod, the cam is coaxially fixed on the connecting shaft and located in the guide wheel, the number of the abutting rods corresponds to the number of the push plates, the abutting rods slide in the guide wheel along the radial direction, an end of each abutting rod is hingedly connected with a hinged rod, an end of the hinged rod is hingedly connected with a push plate, and an end of the abutting rod away from the push plate abuts against the cam; a guide groove is formed in the guide wheel, a guide rod slidably cooperates with the guide groove on the abutting rod, a reset spring is arranged in the guide groove and located in the guide wheel, one end of the reset spring is connected with a bottom wall of the guide groove, and the other end of the reset spring is connected with the guide rod.

[0020] Through the above technical scheme, in the process of bundle traction twisting, the guide wheel rotates with the movement of the bundle, and at this time, under the cooperation of the ratchet pawl, the connecting shaft rotates synchronously with the guide wheel; when the bundle needs to be tensioned, the rotating motor drives the guide wheel to rotate reversely, at this time, the connecting shaft does not rotate, and the guide wheel rotates relative to the connecting shaft; when the abutment rod moves to the protruding part of the cam, the abutment rod slides to the outside of the guide wheel, that is, drives the push plate to rotate outward, and when the abutment rod is separated from the protruding part of the cam, the abutment rod drives the push plate to reset; in the process of the push plate rotating outward and then resetting, the push plate contacts the surface of the bundle and drives the bundle to move, realizing the tensioning effect of the bundle.

[0021] Preferably, a locking rod is slidably connected to the mounting disc, a driving cylinder is mounted on the mounting disc, the piston rod end of the driving cylinder is connected with the locking rod, an extension slot is formed in the end of the locking rod, a plug-in rod is slidably connected to the locking rod in the extension slot, a special-shaped part is formed at the end of the plug-in rod, a pushing spring is arranged in the extension slot and connected with the inner wall of the extension slot at one end and connected with the plug-in rod at the other end; an insertion slot is formed in the end of the connecting shaft, and the special-shaped part of the plug-in rod is inserted and matched with the insertion slot.

[0022] Through the above technical scheme, in the process of bundle traction twisting, the guide wheel rotates with the movement of the bundle, and at this time, under the cooperation of the ratchet pawl, the connecting shaft rotates synchronously with the guide wheel; when the bundle needs to be tensioned, the rotating motor drives the guide wheel to rotate reversely, at this time, the connecting shaft does not rotate, and the guide wheel rotates relative to the connecting shaft; when the abutment rod moves to the protruding part of the cam, the abutment rod slides to the outside of the guide wheel, that is, drives the push plate to rotate outward, and when the abutment rod is separated from the protruding part of the cam, the abutment rod drives the push plate to reset; in the process of the push plate rotating outward and then resetting, the push plate contacts the surface of the bundle and drives the bundle to move, realizing the tensioning effect of the bundle.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The conductor in the drag chain cable adopts super 6 type soft conductor, the softness of the conductor is higher, can adapt to the small bending radius in the drag chain process, the conductor and the second tensile member are twisted to form a wire harness, so that the tensile effect is stronger, and the core wire is twisted to form a cable core unit, which solves the problem of difficult sliding between layers in the drag chain process, reduces the risk of core wire breakage; and a plurality of cable core units are distributed at intervals, that is, there is no problem of core wire breakage caused by the release of torsional stress of the innermost layer due to the need to meet the small pitch structure of the drag chain performance; the sheath adopts thermoplastic polyurethane sheath, so that the cable has wear-resistant, cold-resistant and other high-quality properties;

[0025] 2. During the twisting operation, the driving guide wheel is reversed, the push plate is in contact with the surface of the wire harness and drives the wire harness to move reversely, so as to ensure the tension of the wire harness and the twisting effect of the subsequent core wire;

[0026] 3. When the wire harness is conveyed for twisting operation, the guide wheel and the connecting shaft rotate synchronously, preventing the push plate from rotating and affecting the conveying effect. When the driving guide wheel is reversed, the insertion block is inserted and matched with the insertion slot to fix the connecting shaft, that is, to keep the cam stationary, so that the push plate can be smoothly rotated. However, the position of the guide wheel after stopping cannot be guaranteed, so the insertion block and the end of the connecting shaft are first in a tight state by pushing the spring. Then, when the connecting shaft is reversely rotated synchronously driven by the guide wheel, the insertion slot gradually faces the insertion block, and then the insertion block is smoothly inserted and matched with the insertion slot to effectively lock the connecting shaft. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a sectional view of the wear-resistant cable for the drag chain with resistance to torsion, tension and cold of the embodiment of the application;

[0028] Figure 2 It is a structure diagram of the wire harness in the wear-resistant cable for the drag chain with resistance to torsion, tension and cold of the embodiment of the application;

[0029] Figure 3 It is a whole structure diagram of the twisting device embodiment one of the application;

[0030] Figure 4 It is a partial structure diagram of the twisting device embodiment one of the application, mainly embodying the structure of the guide wheel;

[0031] Figure 5 It is a partial structure diagram of the twisting device embodiment two of the application;

[0032] Figure 6 It is a sectional view of the guide wheel in the twisting device embodiment two of the application, mainly embodying the structure of the cam;

[0033] Figure 7It is the structure explosion map of the second embodiment of the twisting device of the application, mainly reflecting the structure of the rotating assembly;

[0034] Figure 8 It is the structure explosion map of the second embodiment of the twisting device of the application, mainly reflecting the structure of the rotating assembly; Figure 7 It is the local enlarged view of A, mainly reflecting the ratchet and pawl structure;

[0035] Figure 9 It is another perspective view of the guide wheel in the second embodiment of the twisting device of the application, mainly reflecting the structure of the guide groove and the guide rod;

[0036] Figure 10 It is the cross-sectional structure schematic view of the locking rod in the second embodiment of the twisting device of the application;

[0037] Figure 11 It is the structure schematic view of the second embodiment of the twisting device of the application.

[0038] The drawing label: 1, sheath; 2, cable core unit; 21, anti-tension PP rope; 3, core wire; 31, insulating sleeve; 4, first anti-tension piece; 5, wire harness; 51, conductor; 52, second anti-tension piece; 6, support frame; 7, unwinding disc; 71, unwinding roller; 72, connecting column; 8, guide mechanism; 81, first guide wheel set; 82, second guide wheel set; 9, twisting mechanism; 10, mounting disc; 101, sliding groove; 102, sliding plate; 1021, support plate; 103, compression spring; 104, driving cylinder; 20, guide wheel; 201, movable port; 202, push plate; 203, sleeve; 2031, ratchet part; 204, guide groove; 205, reset spring; 30, connecting shaft; 301, ring plate; 302, pawl; 304, plug-in slot; 40, rotating assembly; 401, rotating motor; 402, first pulley; 403, second pulley; 404, belt; 50, driving assembly; 501, cam; 502, abutment rod; 5021, hinged rod; 5022, guide rod; 60, locking rod; 601, telescopic groove; 602, plug-in rod; 6021, special-shaped part; 603, pushing spring; 70, avoiding plate. DETAILED DESCRIPTION

[0039] The following will be combined with the Figure 1 - the Figure 11 The application is further described in detail.

[0040] The application embodiment discloses a wear-resistant cable for a torsion-resistant, tension-resistant and cold-resistant drag chain.

[0041] Referring to Figure 1 and Figure 2The wear-resistant cable for the torsion-resistant, tensile-resistant and cold-resistant drag chain comprises a sheath 1 and a plurality of cable core units 2 spaced in the sheath 1, the cable core unit 2 is formed by twisting a plurality of core wires 3 and a first tensile member 4, the core wire 3 is twisted by at least two strands 5, the strand 5 is formed by twisting a conductor 51 and a second tensile member 52, the periphery of the core wire 3 is covered with an insulating sleeve 31, the insulating sleeve 31 is synthetic rubber, the sheath 1 is a thermoplastic polyurethane sheath, the conductor 51 is a super-6 soft conductor, and a twisted tensile PP rope 21 is arranged in the middle of all the cable core units 2.

[0042] The first tensile member 4 and the second tensile member 52 are Kevlar wires.

[0043] In the application, the conductor 51 is a super-6 soft conductor 51, which is more flexible and can adapt to small bending radii during the drag chain process, and the conductor 51 and the second tensile member 52 are twisted to form the strand 5, so that the tensile effect is stronger, and the core wire 3 is twisted in strands to form the cable core unit 2, which solves the problem of difficult sliding between layers during the drag chain process and reduces the risk of core wire 3 breakage; the plurality of cable core units 2 are spaced, i.e. there is no innermost layer that cannot release the torsional stress due to the small pitch structure required to meet the drag chain performance, and the problem of core wire 3 breakage does not exist; the sheath 1 is a thermoplastic polyurethane sheath, so that the cable has excellent properties such as wear resistance and cold resistance, i.e. the tensile and bending resistance of the cable in the application are significantly improved.

[0044] The application further discloses a twisting device.

[0045] Embodiment 1

[0046] Reference Figure 3 The twisting device is used for twisting the strands to form the core wire and comprises a support frame 6, a pay-off reel 7, a guide mechanism 8 and a twisting mechanism 9, the pay-off reel 7 is rotationally arranged on the support frame 6, and the pay-off reel 7 is rotationally driven by a driving motor, a plurality of pay-off rollers 71 are circumferentially arranged on the pay-off reel 7, the pay-off rollers 71 are used for storing the wound strands, the pay-off reel 7 is fixedly connected with a mounting disc 10 through a connecting column 72, i.e. the mounting disc 10 is coaxially rotatable with the pay-off reel 7; the guide mechanism 8 comprises a first guide wheel set 81 and a second guide wheel set 82, the number of the first guide wheel set 81 is the same as that of the pay-off reel 7 and corresponds one-to-one, the first guide wheel set 81 is fixedly mounted on the mounting disc 10, and the first guide wheel set 81 comprises two guide wheels 20, and a conveying gap for conveying and moving the strands is formed between the two guide wheels 20.

[0047] The connecting column 72 extends to the side of the mounting disc 10 away from the unwinding disc 7, the number of the second guide wheel set 82 is the same as that of the first guide wheel set 81, and the second guide wheel set 82 is one-to-one corresponding to the first guide wheel 20, the structure of the second guide wheel set 82 is the same as that of the first guide wheel 20, the second guide wheel set 82 is installed on the connecting column 72, and the second guide wheel set 82 is located on the side close to the twisting mechanism 9, and the surrounding radius of all the second guide wheel set 82 is smaller than that of all the first guide wheel set 81. The twisting mechanism 9 is of a conventional structure, which is not the focus of the application, and thus will not be described in detail,

[0048] When the twisting operation is performed, the unwinding disc 7 and the mounting disc 10 rotate synchronously, all the wire bundles are gathered to the twisting mechanism 9 through the guide mechanism 8, and are moved by the front-end traction mechanism, so that all the wire bundles are twisted.

[0049] Referring to Figure 3 and Figure 4 The mounting disc 10 is radially provided with a sliding groove 101, and a sliding plate 102 is slidably connected in the sliding groove 101. The mounting disc 10 is provided with a compression spring 103 in the sliding groove 101, one end of the compression spring 103 is connected with the sliding plate 102, and the other end of the compression spring 103 is connected with the bottom wall of the sliding groove 101. Two supporting plates 1021 are vertically arranged on the sliding plate 102, two connecting shafts 30 are installed between the two supporting plates 1021, two guide wheels 20 are one-to-one corresponding to the two connecting shafts 30, and the guide wheel 20 is rotationally connected with the connecting shaft 30.

[0050] In actual production process, when the core wire twisting reaches the set length, the traction mechanism and the unwinding disc 7 will stop working synchronously, and cutting operation is performed. At this time, due to the mechanical inertia, the unwinding roller 71 and the guide wheel 20 will continue to rotate by a certain angle, resulting in the relaxation phenomenon of the wire bundle near the twisting mechanism 9; this relaxation state will make the wire bundle not immediately enter the effective twisting state when restarted, and then cause the twisting effect of the core wire to decrease. In the application, the compression spring 103 can make the sliding plate 102 slide, ensure the tension of the wire bundle, and then ensure the twisting quality of the core wire.

[0051] Example 2

[0052] Referring to Figure 5The difference between the embodiment and embodiment 1 is that the two supporting plates 1021 are fixedly connected to the mounting disc 10, the connecting shaft 30 is rotatably connected to the two supporting plates 1021, the rotating assembly 40 for driving the guide wheel 20 to rotate is arranged on the mounting disc 10, and the rotating direction of the rotating assembly 40 for driving the guide wheel 20 is opposite to the rotating direction of the wire harness under traction. A plurality of movable openings 201 are arranged in the circumferal side of the guide wheel 20, the guide wheel 20 is hingedly connected with a push plate 202 in the movable opening 201, and the guide wheel 20 is provided with a driving assembly 50 for driving the push plate 202 to reciprocatingly rotate outward. In the initial state, the push plate 202 is accommodated in the movable opening 201. When the rotating assembly 40 drives the guide wheel 20 to rotate, the driving assembly 50 drives the push plate 202 to rotate.

[0053] In the traction stage, the guide wheel 20 rotates synchronously with the wire harness conveying. After traction stops, the wire harness is loose, at which time the rotating assembly 40 controls the guide wheel 20 to rotate reversely, and the driving assembly 50 drives the push plate 202 to periodically swing. When the push plate 202 rotates out of the outer side of the guide wheel 20, the surface of the push plate 202 is in close contact with the outer skin of the wire harness, and the wire harness is pulled back to the direction of the pay-off disc 7 by using the friction force. Finally, the wire harness is in a loose state between the pay-off disc 7 and the mounting disc 10, but does not affect the subsequent twisting operation. The design enhances the friction force between the wire harness and the guide wheel 20, effectively improves the conveying efficiency of the wire harness, ensures that the wire harness close to the twisting mechanism 9 is always in a tension state, and significantly optimizes the twisting effect and quality of the core wire.

[0054] In embodiment 1, the compression spring 103 is used to realize the tensioning of the wire harness, which has certain disadvantages. During the rotation of the pay-off disc 7, the state of the compression spring 103 is unstable due to the centrifugal force, which will cause the wire harness to not be able to ensure a stable tensioning state during the twisting process, resulting in a decline in the twisting effect. In the present application, the guide wheel 20 cannot move during the working process, which ensures the consistency of the tensioning of the wire harness, and the wire harness is only tensioned after shutdown, which is convenient for subsequent processing.

[0055] Referring to Figure 5 and Figure 7 The two side edges of the guide wheel 20 are formed with sleeves 203, the sleeves 203 are sleeved on the connecting shaft 30 and form a rotating fit. The rotating assembly 40 includes a rotating motor 401, a first pulley 402, a second pulley 403 and a belt 404, the rotating motor 401 is fixedly installed on the mounting disc 10, the first pulley 402 is coaxially fixed on the output shaft of the rotating motor 401, the second pulley 403 is coaxially fixed on the sleeve 203, and the belt 404 is wound on the first pulley 402 and the second pulley 403.

[0056] In the process of the wire bundle traction twisting operation, the guide wheel 20 rotates passively by the movement of the wire bundle, and the rotating motor 401 remains in a stationary state at this time. When the wire bundle needs to be tensioned, the rotating motor 401 is operated, and after the motor is started, power is transmitted through the first pulley 402, and the second pulley 403 is driven to rotate by the transmission of the belt 404, thereby realizing the reverse rotation of the guide wheel 20 and completing the tensioning action of the wire bundle.

[0057] With reference to Figure 6 , Figure 7 , Figure 8 and Figure 9 , a ratchet part 2031 is formed on the sleeve 203, the connecting shaft 30 is fixedly connected with a ring plate 301, the ring plate 301 is hingedly connected with a pawl 302 through a torsion spring, and the pawl 302 is tightly abutted with the teeth of the ratchet part 2031 under the action of the torsion spring. The driving assembly 50 comprises a cam 501 and an abutting rod 502, the cam 501 is coaxially fixed on the connecting shaft 30 and located in the guide wheel 20, the abutting rod 502 is the same in number as the push plates 202 and one-to-one corresponding, the abutting rod 502 slides in the radial direction in the guide wheel 20, the end of the abutting rod 502 is hingedly connected with a hinged rod 5021, the end of the hinged rod 5021 is hingedly connected with the corresponding push plate 202, and the other end of the abutting rod 502 is abutted with the cam 501; a guide groove 204 is radially formed in the guide wheel 20, a guide rod 5022 is integrally formed on the side of the abutting rod 502, the guide rod 5022 is slidingly matched with the guide groove 204, and the guide wheel 20 is provided with a return spring 205 in the guide groove 204, one end of the return spring 205 is connected with the inner wall of the guide groove 204, and the other end is connected with the guide rod 5022.

[0058] In the wire bundle traction twisting stage, the guide wheel 20 starts to rotate under the movement of the wire bundle, and at the same time, the linkage mechanism of the ratchet and pawl promotes the connecting shaft 30 to keep synchronous rotation with the guide wheel 20. When entering the wire bundle tensioning link, the rotating motor 401 is started and drives the guide wheel 20 to rotate reversely, and at this time, the connecting shaft 30 remains stationary due to the one-way locking characteristic of the ratchet and pawl, and the guide wheel 20 can independently rotate relative to the connecting shaft 30. With the rotation process, the abutting rod 502 installed on the guide wheel 20 gradually reaches the protruding part of the cam 501, and under the pushing of the contour of the cam 501, the abutting rod 502 slides radially to the outside of the guide wheel 20, thereby driving the push plate 202 to flip outward. Once the abutting rod 502 is separated from the protruding area of the cam 501, the push plate 202 will be brought back to the initial position under the action of the return spring 205. In the process of the push plate 202 completing this reciprocating motion, it is in contact with the surface of the wire bundle and exerts a friction force, thereby realizing effective tensioning of the wire bundle and ensuring that the wire bundle maintains a suitable tension state in the subsequent processing process.

[0059] With reference to Figure 5 ,Figure 7 and Figure 10 The driving cylinder 104 is fixedly installed on the mounting disc 10, the piston rod end of the driving cylinder 104 is fixedly connected with the locking rod 60, the end of the locking rod 60 is provided with an expansion slot 601, the expansion slot 601 is slidably connected with a plug-in rod 602, the end of the plug-in rod 602 is formed with a special-shaped part 6021, the locking rod 60 is provided with a push spring 603 in the expansion slot 601, one end of the push spring 603 is connected with the inner wall of the expansion slot 601, and the other end is connected with the plug-in rod 602. The end of the connecting shaft 30 is provided with a plug-in slot 304, and the shape of the plug-in slot 304 is matched with the shape of the special-shaped part 6021 of the plug-in rod 602.

[0060] When the guide wheel 20 reversely rotates, the reset spring 205 continuously applies pressure to the abutting rod 502, so that the abutting rod 502 keeps close contact with the cam 501; at the same time, the torsion spring in the ratchet and pawl structure also plays a role. Under the action of the double elastic forces, the rotation of the guide wheel 20 will synchronously drive the rotation of the cam 501. At this time, the plug-in rod 602 cooperates with the plug-in slot 304, so that the connecting shaft 30 is stably locked, and the cam 501 is ensured to maintain a stationary state. The locking mechanism ensures the stable cooperation of the abutting rod 502 and the cam 501, so that the dial plate 202 can normally rotate to complete the effective operation on the wire harness.

[0061] In addition, in the wire harness traction conveying process, the cam 501 will synchronously rotate with the guide wheel 20. However, when the traction stops, the final stop position of the guide wheel 20 is random, so that the plug-in block cannot be accurately aligned with the plug-in slot 304. If the plug-in block cannot be smoothly inserted, when the locking rod 60 slides, the plug-in rod 602 abuts against the end of the connecting shaft 30, and the push spring 603 is compressed. The guide wheel 20 reversely rotates and drives the connecting shaft 30 to rotate. Once the plug-in slot 304 is aligned with the plug-in rod 602, the special-shaped part 6021 will be accurately inserted into the plug-in slot 304, and the connecting shaft 30 is relocked. At this time, the cam 501 is also rotated to the preset position, which is ready for the subsequent work.

[0062] Embodiment 3

[0063] With reference to Figure 11 The difference between this embodiment and embodiment 2 is that the front end of the dial plate 202 is hingedly connected with an avoiding plate 70 through a torsion spring. The avoiding plate 70 can rotate to the side of the guide wheel 20. After the wire harness 5 is straightened and tightened, the subsequent twisting action can be performed. However, at this time, the abutting rod 502 in the guide wheel 20 may be located at the protruding part of the cam 501, and the dial plate 202 is arranged to protrude from the movable opening 201. At this time, when the wire harness 5 is conveyed under the twisting operation, the guide wheel 20 rotates with the wire harness 5, the dial plate 202 contacts the surface of the wire harness 5, and under the abutting force, the avoiding plate 70 rotates to reduce the friction between the dial plate 202 and the wire harness 5, so that the wire harness 5 can be conveyed smoothly.

[0064] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A stranding device for stranding wire harnesses to form core wires, characterized in that: The application relates to a wire guiding device, which comprises a support frame, a pay-off reel rotatably arranged on the support frame, a guiding mechanism for guiding a wire bundle, and a twisting mechanism; a plurality of pay-off rollers are arranged on the pay-off reel in a circumferential direction; the guiding mechanism comprises a first guiding wheel set and a second guiding wheel set; an installation disc is further arranged on the support frame; the installation disc is coaxially rotatable with the pay-off reel; the first guiding wheel set is identical in number to the pay-off rollers and corresponds to the pay-off rollers one by one; the first guiding wheel set is arranged on the installation disc; the first guiding wheel set comprises two guiding wheels, and a conveying gap for guiding and conveying the wire bundle is formed between the two guiding wheels; the second guiding wheel set is identical in number to the pay-off rollers and corresponds to the pay-off rollers one by one; the second guiding wheel set is located on the side close to the twisting mechanism; and the surrounding radius of all the second guiding wheel sets is smaller than the surrounding radius of all the first guiding wheel sets. Symmetrical supporting plates are arranged on the installation disc; a connecting shaft is rotatably connected between the two supporting plates; the guiding wheels are rotatably connected to the connecting shaft; a rotating assembly for driving the rotation of the guiding wheels is arranged on the installation disc; the rotating direction of the guiding wheels driven by the rotating assembly is opposite to the rotating direction of the guiding wheels in the traction state; a plurality of movable openings are arranged in the circumferential side of the guiding wheels; the guiding wheels are hingedly connected with a plurality of push plates in the movable openings; and a driving assembly for driving the push plates to reciprocatingly rotate outward is arranged in the guiding wheels; in the initial state, the push plates are accommodated in the movable openings; when the rotating assembly drives the rotation of the guiding wheels, the driving assembly drives the push plates to reciprocatingly rotate. A sleeve is formed on the side of the guiding wheel; the sleeve is sleeved on the connecting shaft and rotationally cooperates with the connecting shaft; the rotating assembly comprises a rotating motor, a first pulley, a second pulley and a belt; the first pulley is coaxially fixed on the output shaft of the rotating motor; the second pulley is coaxially fixed on the sleeve; and the belt is wound around the first pulley and the second pulley. One of the sleeves is provided with a ratchet part; a ring plate is fixedly connected to the connecting shaft; a pawl is hingedly connected to the ring plate through a torsion spring; the driving assembly comprises a cam and an abutting rod; the cam is coaxially fixed on the connecting shaft and located in the guiding wheel; the abutting rod corresponds to the number of the push plates; the abutting rod slides in the guiding wheel in the radial direction; the end of the abutting rod is hingedly connected with a hinged rod; the end of the hinged rod is hingedly connected with the push plate; and the end of the abutting rod away from the push plate abuts against the cam; a guide groove is formed in the guiding wheel; a guide rod is arranged on the abutting rod and slidably cooperates with the guide groove; a reset spring is arranged in the guide groove and located in the guiding wheel; one end of the reset spring is connected with the bottom wall of the guide groove; and the other end of the reset spring is connected with the guide rod.

2. A stranding apparatus according to claim 1, characterised in that: A sliding groove is formed in the installation disc in the radial direction; a sliding plate is slidably connected in the sliding groove; a compression spring is arranged in the installation disc and located in the sliding groove; one end of the compression spring is connected with the sliding plate; and the other end of the compression spring is connected with the bottom wall of the sliding groove; and the first guiding wheel set is mounted on the sliding plate.

3. A twisting device according to claim 1, characterized in that: The locking rod is slidably connected to the mounting disc, a driving cylinder is mounted on the mounting disc, the piston rod end of the driving cylinder is connected with the locking rod, an expansion slot is formed in the end of the locking rod, a plug-in rod is slidably connected to the locking rod in the expansion slot, a special-shaped part is formed in the end of the plug-in rod, a pushing spring is arranged in the expansion slot of the locking rod, one end of the pushing spring is connected with the inner wall of the expansion slot, and the other end of the pushing spring is connected with the plug-in rod; an insertion slot is formed in the end of the connecting shaft, and the special-shaped part of the plug-in rod is inserted into the insertion slot in a matched mode.

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