A welding wire delivery device

Abstract

The present application relates to the technical field of welding equipment, and discloses a welding wire conveying device, which comprises a mounting frame, a first guide rope ring, a second guide rope ring, a loose ring, a plurality of closed loop ropes and a driving assembly. The front ring body and the rear ring body of the guide rope ring are connected through a plug rod and a plug slot, the inner ring and the outer ring of the loose ring are connected through a connecting protrusion and a connecting plug slot, and both form a staggered closed structure that can laterally install a rope. The loose ring is rotationally matched with the annular protrusion of the guide rope ring through an annular sliding slot, and the rotational angle is locked by a fastener. The rotation of the loose ring gathers the plurality of closed loop ropes towards the welding wire and forms a flexible envelope clamping. The driving assembly drives the closed loop ropes to circulate through a gear ring, a gear set and a driving rope wheel, so as to convey the welding wire by friction, thereby dispersing the clamping pressure and reducing the indentation, flattening and bending deformation of the welding wire.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically to a welding wire feeding device. Background Technology

[0002] A welding wire feeder is used to continuously and stably feed welding wire from a wire spool or storage area into a welding torch, contact tip, or other welding execution location. Existing welding wire feeders typically use opposing feed rollers and pressure rollers to hold the welding wire. A drive motor rotates the feed rollers, and the friction between the rollers and the welding wire propels the wire forward. To prevent the welding wire from slipping between the feed rollers and pressure rollers, a large clamping force is applied to the pressure rollers using springs, clamping screws, or swing arms to hold the welding wire within the grooves of the feed rollers.

[0003] Chinese patent document CN203171119U discloses a wire feeding mechanism for an argon arc welding machine, which includes a motor, a reduction gear, a wire feeding wheel, and a wire pressing wheel. The output shaft of the motor is connected to the reduction gear, which is connected to the wire feeding wheel. The wire feeding wheel and the wire pressing wheel cooperate to press the wire, and the rotation of the wire feeding wheel realizes the feeding of the welding wire. This type of structure can achieve continuous wire feeding by utilizing the friction between the wheel and the welding wire, and the wire feeding stability can be improved by adjusting the pressure of the wire pressing wheel.

[0004] However, the wire feed roller and the wire clamping roller typically apply rigid clamping force on opposite sides or at a few contact points of the welding wire, resulting in concentrated clamping load. When the clamping force is small, the welding wire easily slips in the roller groove, causing fluctuations in the wire feed speed. When the clamping force is increased to improve traction, the local contact pressure increases accordingly, easily forming indentations on the welding wire surface and potentially flattening or causing local bending of the welding wire cross-section. For welding wires with smaller diameters, softer materials, or coated surfaces, these deformations are more likely to affect the smoothness of the welding wire passing through the guide tube and contact tip, and may even cause increased wire feeding resistance and instability in the welding process. Therefore, a welding wire feeding device is needed that can distribute clamping pressure and reduce local deformation of the welding wire while ensuring the conveying friction. Summary of the Invention

[0005] This invention provides a welding wire feeding device, which aims to solve the problem that when existing welding wire feeding mechanisms use rigid wire feeding wheels and wire pressing wheels to clamp the welding wire in a concentrated manner, the welding wire is easily indented, flattened, or bent due to excessive local clamping pressure.

[0006] A welding wire feeding device includes a mounting frame, and further includes a first guide rope ring and a second guide rope ring spaced apart along the welding wire feeding direction on the mounting frame, a tension ring disposed between the first guide rope ring and the second guide rope ring, multiple closed-loop ropes, and a drive assembly. The multiple closed-loop ropes are respectively threaded through the first guide rope ring, the tension ring, and the second guide rope ring. The tension ring is rotatable relative to the first guide rope ring and the second guide rope around the feeding axis of the welding wire, so that the rope segment of the closed-loop rope located between the first guide rope ring and the tension ring or between the tension ring and the second guide rope ring will be circumferentially offset and retract towards or away from the welding wire. When the multiple closed-loop ropes retract towards the welding wire, they together form a flexible envelope clamp. The drive assembly is used to drive the multiple closed-loop ropes to circulate, so as to feed the welding wire through the friction between the closed-loop ropes and the welding wire.

[0007] The effect is as follows: the first and second guide rope rings respectively define the reference positions of the closed-loop ropes on both sides of the tension ring. After the tension ring rotates relative to the two guide rope rings, the rope-limiting position at the tension ring and the rope-guiding position at the guide rope ring are circumferentially misaligned, causing the rope segment between them to change from extending approximately along the wire feeding direction to extending at an angle. Under the chordal constraint formed by the circumferential misalignment at both ends, the middle of the rope segment is brought together towards the feeding axis. Multiple closed-loop ropes simultaneously approach the wire from different circumferential directions, distributing the clamping force on the wire across multiple flexible contact areas, rather than concentrating it at a few contact points formed by a pair of rigid wheels. The closed-loop ropes can adapt to the shape of the wire's outer circumference, reducing local contact stress while maintaining sufficient contact length and conveying friction, thereby reducing wire surface indentation, cross-sectional flattening, and local bending. The drive assembly causes each closed-loop rope to circulate along its own closed path, and the multiple ropes exert unidirectional traction on the wire, improving the uniformity of the conveying force. When it is necessary to insert, remove or replace the welding wire, simply rotate the tension ring in the opposite direction to move the rope segment away from the welding wire, thereby expanding the clamping space. There is no need to force the welding wire through the high-pressure clamping position, which takes into account the flexibility of clamping, continuous conveying and ease of loading and unloading.

[0008] Furthermore, both the first and second guide rope rings include a front ring and a rear ring arranged opposite each other along the wire feeding direction. One of the front and rear rings is provided with multiple insert rods, and the other is provided with slots corresponding to the multiple insert rods. Each insert rod is inserted into its corresponding slot, so that the front and rear rings are circumferentially positioned and connected. Multiple guide rope positions are formed between the front and rear rings, spaced apart circumferentially, and each guide rope position allows a closed-loop rope to pass through. The effect is that the insert rods and slots can guide the front and rear rings to accurately align along the wire feeding direction and restrict relative circumferential movement between the two rings, keeping the guide rope positions stable and corresponding. At the same time, the insertion structure facilitates the axial separation of the two rings to insert or remove the closed-loop rope from the side of the ring.

[0009] Furthermore, at least one of the front and rear ring bodies is provided with a guide rope hole communicating with the guide rope position and a guide rope loading notch communicating with the outer periphery of the ring body. After the front and rear ring bodies are inserted through a rod and a slot, the solid part of the other ring body is circumferentially offset from the guide rope loading notch and blocks the guide rope loading notch, so that the guide rope position is offset and closed. The effect is that the guide rope loading notch allows the complete closed-loop rope to enter the guide rope hole laterally from the outer periphery of the ring body; after the front and rear ring bodies are inserted into place, the rod and slot maintain the circumferential relative position of the two ring bodies, so that the solid part of the other ring body continuously blocks the path of the closed-loop rope from coming out, thus meeting the requirements of rapid rope loading and anti-derailment during operation without cutting the rope.

[0010] Furthermore, the tension ring includes an inner ring and an outer ring sleeved on the outside of the inner ring. The outer circumference of the inner ring is provided with multiple circumferentially spaced connecting protrusions, and the outer ring is provided with connecting slots corresponding to each of the connecting protrusions. Each connecting protrusion is inserted into its corresponding connecting slot, thereby positioning and connecting the inner and outer rings circumferentially. Multiple circumferentially spaced rope-limiting positions are formed between the inner and outer rings, each allowing a closed-loop rope to pass through. The effect is that the connecting protrusions and connecting slots form a tension ring assembly that can rotate synchronously, restricting relative circumferential movement between the two. Pulling the connecting protrusions out of the connecting slots allows the inner and outer rings to be axially separated, facilitating the installation of closed-loop ropes from the side. Simultaneously, the inner and outer rings jointly define the radial and circumferential positions of each closed-loop rope at the tension ring.

[0011] Furthermore, the outer ring is provided with multiple tensioning rope notches that correspond one-to-one with the rope limiting position. After the inner ring and the outer ring are inserted, the solid part of the inner ring respectively blocks the path of the closed loop rope from the corresponding tensioning rope notch to the outside. One of the first guide rope ring and the second guide rope ring is a mating guide rope ring. The outer ring is provided with an annular groove on the side facing the mating guide rope ring, and the mating guide rope ring is provided with an annular protrusion that slides with the annular groove on the side facing the outer ring. The mating guide rope ring is provided with multiple connecting holes spaced apart along the circumference. The fastener passes through the outer ring and selectively connects to one of the connecting holes so as to lock the outer ring and the mating guide rope ring after the tensioning ring rotates to the set circumferential position. Its effects are as follows: multiple tensioning rope notches facilitate the insertion of each closed-loop rope into the corresponding rope limiting position from the outer periphery; after the inner ring is inserted into the outer ring, the solid part forms a staggered closure for each tensioning rope notch; the annular groove and annular protrusion limit the radial displacement of the tensioning ring while allowing the tensioning ring to rotate smoothly around the welding wire conveying axis; through the cooperation of fasteners and different connecting holes, the tensioning ring can be kept in different circumferential positions, so that the degree of envelopment and clamping of the welding wire by the closed-loop rope can be reliably adjusted and locked.

[0012] Furthermore, the number of guide rope positions on the first and second guide rope rings is the same as the number of limit rope positions on the tensioning ring. In the released state, each limit rope position is opposite to its corresponding guide rope position along the wire feeding direction. In the clamped state, each limit rope position is offset circumferentially relative to its corresponding guide rope position. The effect is that each closed-loop rope has a set of corresponding guide rope positions and limit rope positions, allowing the circumferential rotation of the tensioning ring to simultaneously change the extension direction of multiple ropes. By controlling the circumferential offset, the variable clamping space can be continuously adjusted, facilitating the adaptation to welding wires of different diameters and controlling the clamping degree.

[0013] Furthermore, multiple closed-loop ropes are evenly distributed along the circumference of the welding wire, and the sections of these ropes close to the welding wire together form a variable clamping space for the welding wire to pass through. The effect is that the evenly distributed closed-loop ropes can apply force from multiple directions around the welding wire, making the resultant force on the welding wire closer to the conveying axis, reducing the possibility of the welding wire shifting to one side or bending during clamping, and ensuring a more balanced traction load across the different ropes.

[0014] Furthermore, the edges of the guide rope and limit rope positions that contact the closed-loop rope are designed with rounded transition surfaces to reduce rope bending and wear during the closed-loop rope's cyclical movement. The effect is that the rounded transition surfaces prevent the closed-loop rope from repeatedly scraping against sharp edges when entering or leaving the guide rope and limit rope positions, reducing local curvature abrupt changes and surface wear, thus helping to maintain smooth rope movement and extend its service life.

[0015] Furthermore, the drive assembly includes a drive motor, a gear ring, multiple gear sets, and multiple drive pulleys. The gear ring is rotatably mounted on a mounting frame. The output end of the drive motor is connected to the gear ring via a transmission connection. Multiple gear sets are spaced apart circumferentially along the gear ring. The input end of each gear set is connected to the gear ring via a transmission connection, and the output end of each gear set is connected to its corresponding drive pulley. Each closed-loop rope is wound around its corresponding drive pulley, so that when the gear ring rotates, it drives multiple drive pulleys to rotate through multiple gear sets, thereby driving multiple closed-loop ropes in a cyclical motion. The advantage is that a single drive motor transmits power to multiple circumferentially distributed gear sets through a common gear ring, enabling the separate driving of multiple drive pulleys within a compact structure. This reduces the increased volume and control complexity caused by configuring a separate power source for each closed-loop rope, and facilitates maintaining a consistent conveying direction for multiple closed-loop ropes.

[0016] Furthermore, each gear set includes a meshing driving bevel gear and a driven bevel gear. The driving bevel gear is coaxially connected to a transmission gear, which meshes with the gear ring. The driven bevel gear is coaxially connected to the corresponding drive pulley via a pulley shaft. The effect is that the gear ring drives the driving bevel gear to rotate via the transmission gear. The driving bevel gear meshes with the driven bevel gear to change the direction of power transmission, and then the pulley shaft drives the drive pulley to rotate. This allows multiple circumferentially distributed drive pulleys to be driven by the same gear ring, adapting to the spatial relationship of the drive pulleys arranged around the welding wire conveying axis.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows: This invention utilizes a first guide ring, a second guide ring, and a tension ring to jointly define multiple closed-loop ropes. By rotating the tension ring circumferentially relative to the two guide rings, the multiple flexible ropes converge towards the welding wire, forming a circumferential envelope clamp. This transforms the concentrated clamping of traditional rigid wheels into flexible clamping with a multi-point, long contact area, reducing local pressure on the welding wire and minimizing indentation, flattening, and bending deformation. The front and rear rings of the guide rings are inserted into slots via insert rods, while the inner and outer rings of the tension ring are inserted into connecting slots via connecting protrusions. This facilitates the lateral insertion of the closed-loop ropes from the outer periphery of the rings and ensures a stable, misaligned closure after assembly. The tension ring forms a rotational engagement with an annular protrusion on the guide ring via an annular groove, and different connecting holes can be selectively connected by fasteners to reliably maintain the tension ring at the desired clamping angle. The drive motor drives multiple closed-loop ropes to circulate through a gear ring, multiple gear sets and corresponding drive rope pulleys. The power transmission path is concentrated and the arrangement is compact, which enables all ropes to jointly pull the welding wire, improving the continuity of wire feeding and the uniformity of force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0019] Figure 2 This is a side view of the structure of the present invention.

[0020] Figure 3 This is an exploded structural diagram of the tension ring and the matching guide rope ring of the present invention, viewed from one side.

[0021] Figure 4 This is an exploded structural diagram of the tension ring and the matching guide rope ring of the present invention, viewed from the other side.

[0022] Figure 5 This is a schematic diagram of the AA sectioning position of the present invention.

[0023] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure at point AA.

[0024] Figure 7This is a schematic diagram of the structure of the present invention, in which multiple closed-loop ropes form a flexible envelope clamping of the welding wire.

[0025] Figure label: 1. Mounting bracket; 2. First guide rope ring; 21. Front ring body; 22. Rear ring body; 23. Guide rope position; 24. Guide rope hole; 25. Guide rope loading notch; 26. Insert rod; 27. Slot; 28. Annular protrusion; 29. ​​Connecting hole; 3. Second guide rope ring; 4. Tensioning ring; 41. Inner ring; 42. Outer ring; 43. Rope limiting position; 44. Tensioning rope loading notch; 45. Connecting protrusion; 46. Connecting slot; 47. Annular groove; 48. Fastener; 5. Closed-loop rope; 6. Drive assembly; 61. Drive motor; 62. Gear ring; 63. Gear set; 64. Drive rope pulley; 7. Welding wire. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figures 1 to 7 As shown, a welding wire feeding device includes a mounting frame 1, a first guide rope ring 2, a second guide rope ring 3, a tensioning ring 4, multiple closed-loop ropes 5, and a drive assembly 6. The first guide rope ring 2 and the second guide rope ring 3 are spaced apart on the mounting frame 1 along the feeding direction of the welding wire 7. The tensioning ring 4 is located between the first guide rope ring 2 and the second guide rope ring 3. The multiple closed-loop ropes 5 pass through the first guide rope ring 2, the tensioning ring 4, and the second guide rope ring 3 respectively. The drive assembly 6 is located on the mounting frame 1 and is in transmission cooperation with the multiple closed-loop ropes 5.

[0028] Mounting frame 1 supports the first guide rope ring 2, the second guide rope ring 3, the tension ring 4, and the drive assembly 6, and arranges these components around the same feeding axis of the welding wire 7. An axial space is formed in the middle of mounting frame 1 for the welding wire 7 to pass through. The first guide rope ring 2 and the second guide rope ring 3 are located at opposite ends of this axial space, the tension ring 4 is located between the two guide rope rings, and the drive assembly 6 is mounted on mounting frame 1, thereby maintaining the axial relative positions of the components and providing a continuous feeding channel for the welding wire 7.

[0029] The first guide ring 2 and the second guide ring 3 have the same or corresponding structures, and are used to define the circumferential position of the closed-loop rope 5 on the front and rear sides of the tension ring 4, respectively. Both the first guide ring 2 and the second guide ring 3 are arranged around the feeding axis of the welding wire 7, and their central through-hole allows the welding wire 7 to pass through. The two guide rings are fixed to the mounting frame 1, so that their circumferential position remains unchanged during the rotation of the tension ring 4, thereby forming a relatively stable guiding reference at both ends for the closed-loop rope 5.

[0030] Both the first guide rope ring 2 and the second guide rope ring 3 include a front ring body 21 and a rear ring body 22. The front ring body 21 and the rear ring body 22 are arranged opposite each other along the feeding direction of the welding wire 7. One of the front ring body 21 and the rear ring body 22 has multiple insertion rods 26 on one side facing the other, and the other has slots 27 corresponding to the multiple insertion rods 26. When the front ring body 21 and the rear ring body 22 are engaged, each insertion rod 26 is inserted into the corresponding slot 27 along the feeding direction of the welding wire 7, so that the front ring body 21 and the rear ring body 22 are circumferentially positioned. Multiple guide rope positions 23 are formed between the two ring bodies and are arranged circumferentially. Each guide rope position 23 allows a closed loop rope 5 to pass through, so that different closed loop ropes 5 are separated from each other at the guide rope ring, avoiding multiple ropes from crossing, tangling or squeezing each other during the cyclic movement.

[0031] In this embodiment, at least one of the front ring 21 and the rear ring 22 is provided with a rope guide hole 24, which constitutes the main rope-accommodating space corresponding to the rope guide position 23. The ring with the rope guide hole 24 is also provided with a rope loading notch 25, which extends from the rope guide hole 24 to the outer circumferential surface of the ring, thereby forming a lateral loading path for the closed-loop rope 5 to enter the rope guide hole 24 from the outside of the ring. The width of the rope loading notch 25 is not less than the lateral dimension of the closed-loop rope 5 in its natural state, or the closed-loop rope 5 can be pressed into the rope guide hole 24 by the flexible deformation of the rope itself.

[0032] When the front ring 21 and the rear ring 22 are assembled, the insert rod 26 and the slot 27 define the circumferential relative positions of the two rings, so that the solid part of the ring without the corresponding notch is located radially outside or axially corresponding to the guide rope loading notch 25. After the closed-loop rope 5 is inserted into the guide rope hole 24, the front ring 21 and the rear ring 22 are inserted into place along the wire 7 feeding direction. The solid part of the other ring then blocks the guide rope loading notch 25, so that the guide rope position 23 forms a folded, staggered closed path. If the closed-loop rope 5 moves towards the outer periphery of the ring, it needs to cross two circumferentially staggered open paths at the same time. Therefore, it is not easy to come out of the guide rope position 23 during normal circulation, relaxation vibration, or when subjected to radial off-center load.

[0033] When it is necessary to install or replace the closed-loop rope 5, pull the front ring 21 and the rear ring 22 apart along the direction of the welding wire 7, so that each insert rod 26 exits the corresponding slot 27, and the guide rope loading notch 25 is exposed. After inserting or removing the closed-loop rope 5 from the side through the guide rope loading notch 25, insert each insert rod 26 into the corresponding slot 27 to restore the circumferential positioning and misalignment closure of the front ring 21 and the rear ring 22. This plug-in assembly method does not require cutting the closed-loop rope 5, nor does it require relative circumferential rotation of the two rings.

[0034] The tensioning ring 4 includes an inner ring 41 and an outer ring 42, with the outer ring 42 fitted over the outer side of the inner ring 41. The outer circumference of the inner ring 41 has multiple circumferentially spaced connecting protrusions 45, and the inner side of the outer ring 42 has connecting slots 46 corresponding to each of the connecting protrusions 45. Multiple circumferentially spaced rope-limiting positions 43 are formed between the inner ring 41 and the outer ring 42, and the outer ring 42 also has multiple tensioning rope-attaching notches 44 that communicate with the corresponding rope-limiting positions 43. The number of rope-limiting positions 43 is the same as the number of rope-guided positions 23 on the first guide rope ring 2 and the second guide rope ring 3, and each rope-limiting position 43 allows a closed-loop rope 5 to pass through.

[0035] When assembling the tensioning ring 4, first separate the inner ring 41 and the outer ring 42 along the feeding direction of the welding wire 7, and insert each closed-loop rope 5 laterally into the rope-limiting position 43 through the corresponding tensioning rope notch 44; then insert the inner ring 41 into the outer ring 42 along the feeding direction of the welding wire 7, and insert each connecting protrusion 45 into the corresponding connecting slot 46 to restrict the relative circumferential rotation of the inner ring 41 and the outer ring 42, so that the two can rotate synchronously as a whole as the tensioning ring 4. After the inner ring 41 and the outer ring 42 are inserted into place, the solid part of the inner ring 41 is located on the path of the closed-loop rope 5 coming outward from the corresponding tensioning rope notch 44, so that each rope-limiting position 43 forms a staggered closure.

[0036] One of the first guide rope ring 2 and the second guide rope ring 3 serves as the mating guide rope ring, which is arranged adjacent to the outer ring 42. The outer ring 42 has an annular groove 47 coaxial with the wire 7 feeding axis on the side facing the mating guide rope ring. The mating guide rope ring has an annular protrusion 28 that mates with the annular groove 47 on the side facing the outer ring 42. The mating guide rope ring has multiple connecting holes 29 spaced circumferentially, and the outer ring 42 has mounting holes for fasteners 48 to pass through. During assembly, the annular protrusion 28 slides within the annular groove 47 to limit excessive radial offset of the tension ring 4 relative to the mating guide rope ring and allows the tension ring 4 to rotate as a whole around the wire 7 feeding axis. After the tension ring 4 rotates to the desired circumferential position, the fastener 48 passes through the mounting hole of the outer ring 42 and connects with the corresponding connecting hole 29, thereby locking the outer ring 42 with the mating guide rope ring. When it is necessary to adjust the circumferential position of the tension ring 4, first release the lock of the fastener 48, then rotate the tension ring 4 along the rotation guide path formed by the annular groove 47 and the annular protrusion 28, and lock it again after reaching the desired position.

[0037] In the released state, the rope limiting positions 43 on the tension ring 4 are respectively opposite to the corresponding rope guiding positions 23 on the first guide ring 2 and the second guide ring 3 along the feeding direction of the welding wire 7. At this time, the rope segments of the closed loop rope 5 located between the first guide ring 2 and the tension ring 4, and between the tension ring 4 and the second guide ring 3, extend basically along the feeding direction of the welding wire 7. The rope segments of multiple closed loop ropes 5 close to the welding wire 7 form a large variable clamping space, through which the welding wire 7 can pass with less resistance.

[0038] When the tension ring 4 rotates circumferentially relative to the first guide ring 2 and the second guide ring 3, each rope limiting position 43 simultaneously deviates from its corresponding guide position 23. Because the circumferential position of the closed-loop rope 5 is restricted at the two guide rings, while it moves circumferentially at the tension ring 4 with the rope limiting position 43, the rope segment of the closed-loop rope 5 located between the first guide ring 2 and the tension ring 4, or between the tension ring 4 and the second guide ring 3, gradually changes from axial extension to inclined extension. During this circumferential offset, this rope segment moves closer to the welding wire 7's feed axis, causing multiple ropes to collectively reduce the variable clamping space and contact the outer periphery of the welding wire 7.

[0039] Multiple closed-loop ropes 5 are evenly distributed around the welding wire 7. The rope segments of each closed-loop rope 5 closest to the welding wire 7 are flexible, capable of adaptively bending according to the shape of the outer circumference of the welding wire 7, and forming multiple spaced contact areas around the welding wire 7. As the tension ring 4 continues to rotate, the radial component of the force exerted by each rope segment on the welding wire 7 gradually increases, and the clamping degree can be adjusted by controlling the rotation angle of the tension ring 4. Compared to the point or line-like concentrated contact of a rigid wheel, the flexible ropes can increase the effective contact length and distribute the clamping load.

[0040] The first guide ring 2 and the second guide ring 3 provide guiding references at both ends for each closed-loop rope 5. Multiple rope-limiting positions 43 on the tension ring 4 rotate as a whole, allowing the clamping degree of multiple closed-loop ropes 5 to be adjusted collectively through the same tension ring 4. Multiple closed-loop ropes 5 form flexible contact from different positions around the welding wire 7 and share the traction load during cyclic movement, thereby combining clamping space adjustment with continuous wire feeding. The separate structures of the front ring body 21 and the rear ring body 22, as well as the separate structures of the inner ring 41 and the outer ring 42, are used to insert the complete closed-loop rope 5 from the side of the ring body into the corresponding positions. The misaligned seal after assembly is used to prevent the closed-loop rope 5 from slipping outwards.

[0041] The closed-loop rope 5 can be made of a rope body with a wear-resistant surface layer and a flexible load-bearing core. Its cross-section can be circular, near-circular, or other shapes adapted to the guide hole 24 and the rope limiting position 43. The surface of the closed-loop rope 5 has a coefficient of friction capable of forming stable friction with the welding wire 7, while its hardness is lower than that of the rigid metal wheel surface that directly causes indentation on the surface of the welding wire 7. The specific material and diameter of the closed-loop rope 5 can be determined according to the material and diameter of the welding wire 7, the conveying speed, and the required traction force.

[0042] The edges of the guide rope position 23 and the limiting rope position 43 that contact the closed-loop rope 5 are both designed as arc transition surfaces. The arc transition surfaces extend continuously along the direction in which the closed-loop rope 5 enters and leaves the corresponding positions, preventing the rope from repeatedly crossing sharp corners during cyclical movement. The effective dimensions of the guide rope hole 24 and the limiting rope position 43 are larger than the lateral dimension of the closed-loop rope 5, allowing the rope to move along its closed path while limiting excessive radial sway or circumferential misalignment.

[0043] The drive assembly 6 includes a drive motor 61, a gear ring 62, multiple gear sets 63, and multiple drive pulleys 64. The drive assembly 6 is mounted on a mounting frame 1, wherein the gear ring 62, the multiple gear sets 63, and the multiple drive pulleys 64 are located between the first guide rope ring 2 and the second guide rope ring 3 and arranged around the feeding axis of the welding wire 7. The drive motor 61 is located on the outer side of the mounting frame 1. The drive motor 61 provides rotational power to the entire drive assembly 6. The gear ring 62, as a common power distribution component, transmits the power of the drive motor 61 to the multiple gear sets 63 distributed circumferentially, and each gear set 63 drives its corresponding drive pulley 64.

[0044] A gear ring 62 is rotatably mounted on the mounting frame 1 around the feeding axis of the welding wire 7. The central area of ​​the gear ring 62 allows the welding wire 7 and the closed-loop rope 5 segment near the welding wire 7 to pass through. The gear ring 62 maintains its rotational position by forming a ring-shaped guide engagement with the mounting frame 1, ensuring that it can only rotate around the feeding axis of the welding wire 7 without significant axial or radial movement. A drive motor 61 is fixed to the mounting frame 1, and its output end is connected to the gear ring 62 for transmission. In the illustrated embodiment, the output end of the drive motor 61 drives the gear ring 62 to rotate via gear meshing. Other connection methods that achieve stable transmission can also be used without changing the power distribution principle of the common gear ring 62.

[0045] Multiple gear sets 63 are spaced apart circumferentially along the gear ring 62, their number corresponding to the number of drive sheaves 64. Each gear set 63 includes a driving bevel gear, a driven bevel gear, and a transmission gear. The transmission gear is coaxially connected to the driving bevel gear and rotates synchronously, meshing with the gear ring 62. When the gear ring 62 rotates, it simultaneously drives the multiple transmission gears distributed circumferentially to rotate, and each transmission gear drives its corresponding driving bevel gear to rotate.

[0046] The driving bevel gear meshes with the corresponding driven bevel gear, and their rotation axes intersect to change the direction of power transmission. The driven bevel gear is coaxially connected to the corresponding drive pulley 64 via a pulley shaft. When the driven bevel gear rotates, it directly drives the drive pulley 64 to rotate through the pulley shaft. Each pulley shaft is rotatably mounted on the mounting frame 1, so that multiple drive pulleys 64 can be distributed around the feeding axis of the welding wire 7, and the arrangement direction of each drive pulley 64 is adapted to the running path of the corresponding closed-loop rope 5.

[0047] exist Figure 6 In the arrangement shown, the internal teeth of the gear ring 62 mesh with multiple circumferentially distributed transmission gears. Each gear set 63 and its corresponding drive pulley 64 maintain the same local assembly relationship and are arranged sequentially circumferentially around the welding wire 7 conveying axis. The relative meshing positions of each driving bevel gear and driven bevel gear, the orientation of the pulley shaft, and the corresponding rope winding position on the drive pulley 64 rotate together with the circumferential position of each set. When the gear ring 62 rotates, multiple transmission gears receive rotational input together, and each bevel gear pair transmits this rotational input to the pulley shaft with the corresponding orientation.

[0048] For the two sets of transmission units located on opposite sides of the welding wire 7, one set, along with its corresponding rope winding position, rotates 180° around the feeding axis of the welding wire 7, forming a circumferential correspondence with the other set. The radial orientations of the two sets of sheave shafts are opposite. Under the same local meshing relationship, the angular velocity vectors of the two driving sheaves 64 are opposite, and the lateral orientations of their corresponding rope winding contact positions are also opposite. Therefore, the axial movement directions of the corresponding sheave contact points are the same. The remaining sets are driven according to the same circumferential rotation relationship, so that the rope segments of multiple closed-loop ropes 5 close to the welding wire 7 obtain the same axial movement component. Therefore, the same-direction wire feeding is achieved by the spatial meshing relationship of the bevel gear pair, the orientation of the driving sheaves 64, and the corresponding rope winding positions.

[0049] Each closed-loop rope 5 is wound around a corresponding drive pulley 64. As the drive pulley 64 rotates, the friction between it and the closed-loop rope 5 causes the rope to circulate along its closed path. During operation, the closed-loop rope 5 passes sequentially through the first guide ring 2, the tension ring 4, and the second guide ring 3, and returns to the drive pulley 64 along a return path located outside the flexible envelope clamping area. The rotation direction of each drive pulley 64 is configured to move the sections of the multiple closed-loop ropes 5 close to the welding wire 7 along the same wire feeding direction.

[0050] The segment of each closed-loop rope 5 that approaches and contacts the welding wire 7 is the working rope segment, and the segment located outside the flexible enveloping clamping area is the return rope segment. The working rope segment moves in the direction of wire feeding of 7, and the return rope segment returns along the outer path in the opposite direction, forming a closed loop. The movement along the same wire feeding direction means that the motion components of each working rope segment along the wire feeding axis are in the same direction, not that each drive pulley 64 viewed from the same fixed observation direction rotates in the same clockwise or counterclockwise direction. When the working rope segment tilts due to gathering and enveloping the welding wire 7, the spatial extension direction of each working rope segment may be different, but its axial motion component for wire feeding remains in the same direction.

[0051] The gear ring 62 meshes with multiple transmission gears simultaneously, enabling a single drive motor 61 to distribute power to multiple drive pulleys 64. When all transmission gears, driving bevel gears, and driven bevel gears are of the same specification, multiple drive pulleys 64 can achieve the same or similar rotational speeds, which helps to reduce the speed difference between different closed-loop ropes 5. Even if different ropes experience slight elastic expansion and contraction due to manufacturing errors or load differences, the flexible rope itself can buffer instantaneous differences, reducing the degree of uneven traction on the welding wire 7.

[0052] The gear ring 62 constrains the rotational speed relationship between the corresponding drive rope pulleys 64 through the transmission ratios of each gear set 63. The rotational speed of the drive rope pulley 64 and its effective working radius together determine the rim linear velocity. The closed-loop rope 5 then obtains its cyclic motion speed through friction with the rim. The matching of each transmission ratio, the effective working radius of the drive rope pulley 64, and the corresponding rope path jointly affects the axial running speed of each working rope segment. The joint adjustment of the corresponding circumferential rope segments by the same tension ring 4 helps maintain the correspondence of the rope path. The above-mentioned joint drive is used to reduce the speed difference between different paths, but it does not mean that the actual speed of each rope is still absolutely equal.

[0053] The axial friction provided by each of the 5 closed-loop ropes and 7 welding wires together constitutes the wire feeding traction force, and each contact area can share different sizes of traction load. Under the condition that the axial traction direction of each working rope segment is consistent, the total traction capacity can overcome the wire feeding resistance, and no significant off-center load is formed, small differences in pressure or friction between the ropes do not hinder common wire feeding. Circumferential geometric constraints and the ropes' own flexible deformation are used to mitigate local force differences, without requiring the tension, contact pressure, and friction of each rope to be absolutely equal at every moment.

[0054] When assembling the closed-loop rope 5, firstly, separate the front ring 21 and rear ring 22 of the first guide rope ring 2 and the second guide rope ring 3 along the feeding direction of the welding wire 7, so that the insert rod 26 exits the slot 27 and exposes the guide rope loading notch 25; at the same time, separate the inner ring 41 and outer ring 42 of the tensioning ring 4 along the feeding direction of the welding wire 7, so that the connecting protrusion 45 exits the connecting slot 46 and exposes the tensioning rope loading notch 44. Insert each closed-loop rope 5 into the guide rope hole 24 and the rope limiting position 43 from the corresponding notch side, and wind the closed-loop rope 5 around the corresponding drive rope wheel 64. Then, insert the front ring 21 and the rear ring 22 into the slot 27 through the insert rod 26, so that the solid part of the other ring body covers the guide rope loading notch 25; then insert the connecting protrusion 45 of the inner ring 41 into the connecting slot 46 of the outer ring 42, so that the solid part of the inner ring 41 covers the tensioning rope loading notch 44. Finally, the annular groove 47 of the outer ring 42 is rotated to engage with the annular protrusion 28 of the guide rope ring, and the fastener 48 is not locked temporarily so that the circumferential position of the tension ring 4 can be adjusted later according to the diameter of the welding wire 7 and the required clamping degree.

[0055] This embodiment does not limit the specific number of closed-loop ropes 5, guide rope positions 23, and limit rope positions 43. The more closed-loop ropes 5 there are, the denser the circumferential contact area of ​​the welding wire 7, but the more numerous the drive assembly 6 and ring structure become; in actual use, the number can be determined based on the diameter of the welding wire 7, the required wire feeding force, and the overall dimensions of the device. The number of positions on the first guide rope ring 2, the second guide rope ring 3, and the tensioning ring 4 should be consistent, and each position should correspond one-to-one with the corresponding closed-loop rope 5.

[0056] Working principle: Before use, the tension ring 4 is in the loose state, and the rope limiting positions 43 and the corresponding guide rope positions 23 are basically opposite to each other along the conveying direction of the welding wire 7, and the variable clamping space enclosed by multiple closed-loop ropes 5 is in a large state. The welding wire 7 is passed through the first guide rope ring 2, the tension ring 4 and the second guide rope ring 3 in sequence along the conveying axis, so that the welding wire 7 is located within the space enclosed by multiple closed-loop ropes 5. Since the rope segments have not yet fully contracted inward at this time, the welding wire 7 does not need to overcome a large radial clamping force during the insertion process.

[0057] After threading is completed, the fastener 48 is first released from locking the outer ring 42 and the mating guide ring, allowing the tension ring 4 to rotate relative to the first guide ring 2 and the second guide ring 3 in a predetermined direction under the guidance of the annular groove 47 and the annular protrusion 28. The tension ring 4 causes each rope limiting position 43 to produce a circumferential offset in the same direction, while the guide positions 23 on the two guide rings remain stationary. As a result, the rope segments of the closed loop rope 5 located on both sides of the tension ring 4 gradually tilt and converge towards the welding wire 7. Multiple closed loop ropes 5 gradually contact the outer periphery of the welding wire 7, and the degree of envelopment clamping increases with the rotation angle of the tension ring 4. After reaching the clamping state that meets the conveying requirements, the fastener 48 is passed through the outer ring 42 and connected to the connecting hole 29 corresponding to the current position, locking the tension ring 4 in that circumferential position.

[0058] After the drive motor 61 is started, it drives the gear ring 62 to rotate around the feeding axis of the welding wire 7. The gear ring 62 simultaneously drives multiple transmission gears, each of which drives a coaxial driving bevel gear to rotate. The driving bevel gear changes the direction of power by meshing with the driven bevel gear, and the driven bevel gear drives the corresponding drive rope pulley 64 to rotate via the rope pulley shaft. The multiple drive rope pulleys 64 respectively pull the corresponding closed-loop rope 5 in a cyclical motion, so that the rope segments of each closed-loop rope 5 close to the welding wire 7 move in the same direction.

[0059] When the closed-loop rope 5 circulates, the frictional forces between the multiple ropes and the outer circumference of the welding wire 7 together form a traction force along the conveying direction of the welding wire 7, thereby driving the welding wire 7 to move continuously. Because the welding wire 7 is dispersedly clamped by multiple flexible ropes in the circumference, the local pressure borne by each contact area is less than the local pressure when a few rigid wheels are concentratedly clamped; at the same time, the radial components of the forces in multiple directions are balanced with each other, so that the welding wire 7 is kept in the middle of the variable clamping space during the conveying process, reducing unilateral deviation and bending.

[0060] When it is necessary to stop the conveying, the drive motor 61 is stopped, and the gear ring 62, gear set 63 and drive rope pulley 64 stop accordingly, and the closed loop rope 5 no longer circulates. When it is necessary to remove the welding wire 7 or change the specification, first release the lock of the fastener 48, and then rotate the tension ring 4 in the opposite direction to the clamping direction, so that the rope limiting position 43 gradually returns to the position opposite to the guide rope position 23. The inclination of the closed loop rope 5 decreases and moves away from the welding wire 7, and the variable clamping space expands. Then the fastener 48 can be connected to the corresponding connecting hole 29 to keep it in the loose state, and the welding wire 7 can be pulled out of the device. When it is necessary to replace the closed loop rope 5, separate the front ring body 21 and the rear ring body 22 axially to allow the insert rod 26 to exit the slot 27, and separate the inner ring 41 and the outer ring 42 axially to allow the connecting protrusion 45 to exit the connecting slot 46. Then, take out the closed loop rope 5 laterally through the corresponding rope loading notch.

[0061] Through the above actions, this device can easily thread wire in the loosened state, and in the clamped state, it uses multiple closed-loop ropes 5 to form a flexible envelope, and drives the closed-loop ropes 5 to circulate through a common gear ring 62 and multiple gear sets 63 to achieve stable feeding of welding wire 7. The front ring body 21 and the rear ring body 22 are connected by insert rods 26 and slots 27, and the inner ring 41 and the outer ring 42 are connected by connecting protrusions 45 and connecting slots 46, which can maintain a misaligned and closed relationship while facilitating the disassembly and assembly of the closed-loop ropes 5; the annular groove 47 and the annular protrusion 28 provide stable rotation guidance for the tension ring 4, and the fasteners 48 and different connecting holes 29 can reliably keep the tension ring 4 at the required angle, so that the device can obtain the required feeding friction while reducing local pressure damage and cross-sectional deformation of the welding wire 7.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding wire feeding device, comprising a mounting frame, characterized in that: It also includes a first guide rope ring and a second guide rope ring spaced apart along the wire feeding direction on the mounting frame, a tension ring disposed between the first guide rope ring and the second guide rope ring, multiple closed-loop ropes, and a drive assembly; the multiple closed-loop ropes are respectively threaded through the first guide rope ring, the tension ring, and the second guide rope ring, and the tension ring can rotate relative to the first guide rope ring and the second guide rope around the wire feeding axis, so that the rope segment of the closed-loop rope located between the first guide rope ring and the tension ring or between the tension ring and the second guide rope ring will be circumferentially offset and retract towards or away from the wire; when the multiple closed-loop ropes retract towards the wire, they together form a flexible envelope clamp, and the drive assembly is used to drive the multiple closed-loop ropes to circulate, so as to feed the wire through the friction between the closed-loop ropes and the wire.

2. The welding wire feeding device according to claim 1, characterized in that, Both the first and second guide rope rings include a front ring body and a rear ring body arranged opposite to each other along the wire feeding direction. One of the front and rear ring bodies is provided with multiple insert rods, and the other is provided with slots that correspond one-to-one with the multiple insert rods. Each insert rod is inserted into the corresponding slot so that the front and rear ring bodies are circumferentially positioned and connected. Multiple guide rope positions are formed between the front and rear ring bodies and are circumferentially spaced, and each guide rope position is for a closed-loop rope to pass through.

3. The welding wire feeding device according to claim 2, characterized in that, At least one of the front ring body and the rear ring body is provided with a guide rope hole communicating with the guide rope position and a guide rope loading notch communicating with the guide rope hole and the outer periphery of the ring body. After the front ring body and the rear ring body are connected by a plug and a slot, the solid part of the other ring body is circumferentially misaligned with the guide rope loading notch and blocks the guide rope loading notch, so that the guide rope position is misaligned and closed.

4. The welding wire feeding device according to claim 2, characterized in that, The tensioning ring includes an inner ring and an outer ring sleeved on the outside of the inner ring. The outer circumference of the inner ring is provided with multiple connecting protrusions distributed circumferentially. The outer ring is provided with connecting slots that correspond one-to-one with the multiple connecting protrusions. Each connecting protrusion is inserted into the corresponding connecting slot to position and connect the inner ring and the outer ring circumferentially. Multiple rope-limiting positions are formed between the inner ring and the outer ring, and each rope-limiting position allows a closed-loop rope to pass through.

5. The welding wire feeding device according to claim 4, characterized in that, The outer ring is provided with multiple tensioning rope notches that correspond one-to-one with the rope limiting position. After the inner ring and outer ring are inserted, the solid part of the inner ring respectively blocks the path of the closed loop rope from the corresponding tensioning rope notch outward. One of the first guide rope ring and the second guide rope ring is a mating guide rope ring. The outer ring is provided with an annular groove on the side facing the mating guide rope ring, and the mating guide rope ring is provided with an annular protrusion that slides with the annular groove on the side facing the outer ring. The mating guide rope ring is provided with multiple connecting holes spaced apart along the circumference. The fastener passes through the outer ring and selectively connects to one of the connecting holes so as to lock the outer ring and the mating guide rope ring after the tensioning ring rotates to a set circumferential position.

6. The welding wire feeding device according to claim 4, characterized in that, The number of guide rope positions on the first and second guide rope rings is the same as the number of limit rope positions on the tension ring; in the loosened state, each limit rope position is opposite to the corresponding guide rope position along the welding wire feeding direction; in the clamped state, each limit rope position is offset circumferentially relative to the corresponding guide rope position.

7. The welding wire feeding device according to claim 1, characterized in that, Multiple closed-loop ropes are evenly distributed along the circumference of the welding wire, and the rope segments of the multiple closed-loop ropes close to the welding wire together form a variable clamping space for the welding wire to pass through.

8. The welding wire feeding device according to claim 6, characterized in that, The edges of the guide rope and limit rope positions that contact the closed-loop rope are both designed with rounded transition surfaces to reduce rope bending and wear during the cyclic movement of the closed-loop rope.

9. The welding wire feeding device according to claim 1, characterized in that, The drive assembly includes a drive motor, a gear ring, multiple gear sets, and multiple drive pulleys. The gear ring is rotatably mounted on a mounting frame. The output end of the drive motor is connected to the gear ring via a transmission. Multiple gear sets are spaced apart along the circumference of the gear ring. The input end of each gear set is connected to the gear ring via a transmission, and the output end of each gear set is connected to the corresponding drive pulley. Each closed-loop rope is wound around the corresponding drive pulley, so that when the gear ring rotates, it drives multiple drive pulleys to rotate through multiple gear sets, thereby driving multiple closed-loop ropes to circulate.

10. The welding wire feeding device according to claim 9, characterized in that, Each gear set includes a driving bevel gear and a driven bevel gear that mesh with each other. The driving bevel gear is coaxially connected to a transmission gear, which meshes with the gear ring. The driven bevel gear is coaxially connected to the corresponding drive sheave through a sheave shaft.

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