Arc welding wire feeder

Abstract

The utility model relates to an arc welding wire feeder which comprises a shell. The wire releasing assembly is arranged in the shell, and the wire releasing assembly comprises a bearing shaft used for bearing a welding wire roll; the wire feeding wheel is arranged on one side of the wire releasing assembly and corresponds to the wire releasing assembly; the wire feeding wheel comprises a hub and a soft friction increasing layer arranged on the peripheral face of the hub in a sleeving mode, and the wire feeding wheel is rotationally connected with the shell. The first driving part is linked with the wire feeding wheel and is used for driving the wire feeding wheel to rotate; and the pressing wheel is rotationally arranged above the wire feeding wheel and is in sliding connection with the shell through a lifting adjusting assembly, so that the pressing wheel can slide up and down to adjust the distance between the pressing wheel and the wire feeding wheel. The soft friction increasing layer is used for replacing a groove structure in the prior art, so that the specification of a conveyed welding wire is not limited by the size of a groove, the pressing wheel capable of being adjusted to ascend and descend is matched, the distance between the pressing wheel and the wire feeding wheel is adjustable, the wire feeding device can be matched with welding wires of different diameters, and applicability and compatibility are remarkably improved compared with the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of wire feeder equipment, in particular to an arc welding wire feeder. Background Art

[0002] The wire feeder is used in the welding equipment of disc electrodes to convey welding wire. It mainly includes a wire feeder, a wire feeder wheel, a clamping wheel and several guide mechanisms. A semicircular groove for accommodating the welding wire is formed on the outer peripheral surface of the wire feeder wheel, and the clamping wheel is arranged opposite to the wire feeder wheel. When working, the rolled welding wire is placed on the wire feeder wheel, and the welding wire on the wire roll is pulled out through the guide mechanism and laid in the groove of the wire feeder wheel, and is clamped by the clamping wheel so that the welding wire fits the side of the groove. The wire feeder wheel is driven to rotate by the motor, and the relative friction between the side wall of the groove and the surface of the welding wire causes the welding wire to be pulled forward following the rotation of the wire feeder wheel, and the wire feeder wheel is continuously rotated to complete the unwinding and feeding of the welding wire.

[0003] The technical problems of the above-mentioned wire feeder are: the distance between the wire feeding wheel and the clamping wheel is fixed, and the size of the groove on the outer peripheral surface of the wire feeding wheel is fixed, resulting in limited welding wire diameters that each wire feeder can adapt to and poor applicability.

[0004] Based on the above technical problems, the applicant conducted a search and found an existing patent [CN 212191659U] that discloses a welding wire and electrode conveying device, including an active wire feeding wheel, an auxiliary clamping wheel and a wire feeding base; the active wire feeding wheel is rotatably connected to the wire feeding base through a motor and a reducer; the auxiliary clamping wheel is installed in the wire feeding base through a clamping wheel support and is arranged on the same plane facing the active wire feeding wheel, and the welding wire moves forward under the rotation of the active wire feeding wheel and the auxiliary clamping wheel; a clamping force adjustment mechanism is installed on the wire feeding base to adjust the distance between the auxiliary clamping wheel and the active wire feeding wheel. Compared with the traditional wire feeding mechanism, the welding wire and electrode conveying device can adjust the distance between the auxiliary clamping wheel and the active wire feeding wheel.

[0005] The above patent solves the problem of fixed spacing between the wire feeding wheel and the clamping wheel and poor applicability of the traditional wire feeding machine. However, it is found in actual application that the technical solution of the patent still has the following defects:

[0006] Although the patent provides a clamping force adjustment mechanism with adjustable spacing, it still retains the groove structure on the outer peripheral surface of the wire feeding wheel (see paragraph

[0016] of the patent specification and the accompanying drawings of the specification). Figure 4), limited by the size of the groove, the diameter of the welding wire that the device can be used for in actual application is still very limited. For example, the diameter of the groove is 1mm. When it is necessary to feed a 2mm welding wire, even if the distance between the wire feeding wheel and the clamping wheel is adjusted to about 2mm, the welding wire diameter is much larger than the groove diameter, and the welding wire still cannot be put into the groove for stable wire feeding.

[0007] From the above, it can be seen that the welding wire specifications that can be adapted by the wire feeder in the prior art are limited by two factors: the groove structure of the wire feeding wheel and the distance between the wire feeding wheel and the pressure wheel. The above patent only solves the problem that the distance between the wire feeding wheel and the pressure wheel cannot be adjusted. Due to the limitation of the groove size, the wire feeding device can still only deliver welding wire close to the diameter of the groove, and its applicability is relatively limited.

[0008] In addition, for some upright wire feeders in the prior art, the welding wire reel is fixed by a single support frame, that is, the support frame is provided with an extension shaft, one end of the extension shaft is connected to the support frame, and the other end is suspended. When feeding the wire, the welding wire reel is sleeved on the extension shaft, and the wire release is achieved by the relative rotation of the welding wire reel and the extension shaft. In this structure, due to the unilateral support structure of the extension shaft, the gravity of the welding wire reel is concentrated on the suspended end of the extension shaft, which will significantly increase the relative friction between the extension shaft and the welding wire reel at this point, causing the relative rotation of the welding wire reel and the extension shaft to become stuck, affecting the wire feeding efficiency, and wire breakage is prone to occur when conveying some welding wires with smaller diameters and brittle materials, affecting the continuity and stability of the wire feeding process. Utility Model Content

[0009] In order to solve the problems existing in the above-mentioned prior art, the utility model aims to provide an arc welding wire feeder. The utility model replaces the groove structure in the prior art with a soft friction-increasing layer, so that the specification of the welding wire to be fed is not limited by the size of the groove, and cooperates with an adjustable lifting and lowering clamping wheel, so that the distance between the clamping wheel and the wire feeding wheel is adjustable, which can be adapted to welding wires of different diameters, and the applicability and compatibility are significantly improved compared with the prior art.

[0010] The utility model discloses an arc welding wire feeder, comprising:

[0011] case;

[0012] A wire unwinding assembly is disposed in the housing, and the wire unwinding assembly comprises a supporting shaft for carrying a welding wire coil;

[0013] A wire feeding wheel, which is arranged at one side of the wire unwinding assembly and corresponds to the wire unwinding assembly, and is used to convey the welding wire unwound by the wire unwinding assembly; the wire feeding wheel comprises a hub and a soft friction-increasing layer sleeved on the outer peripheral surface of the hub, and the wire feeding wheel is rotatably connected to the shell;

[0014] A first driving member, which is linked with the wire feeding wheel and is used to drive the wire feeding wheel to rotate;

[0015] The clamping wheel is rotatably arranged above the wire feeding wheel and is slidably connected to the shell through a lifting and adjusting assembly, so that the clamping wheel can slide up and down to adjust the distance between the clamping wheel and the wire feeding wheel.

[0016] Preferably, the wire release assembly includes a support frame, a bearing seat and a first bearing, and the number of the support frame, the bearing seat and the first bearing are two, the two support frames are arranged opposite to each other, the two bearing seats are respectively arranged on the two support frames, the two ends of the supporting shaft are respectively detachably connected to the two bearing seats, and the two first bearings are respectively sleeved on the two ends of the supporting shaft.

[0017] Preferably, the support frame and the shell are an integrated structure, and the support frame is made of steel material; the supporting shaft is made of plastic material.

[0018] Preferably, the soft friction-enhancing layer is made of rubber, plastic or silicone material.

[0019] Preferably, at least one outer peripheral surface of the hub is formed with a groove recessed radially inwardly of the hub, and the inner surface of the soft friction-increasing layer protrudes inwardly at a position corresponding to the groove to form an inner convex portion, and the inner convex portion is embedded in the groove.

[0020] Preferably, the outer peripheral surface of the soft friction-increasing layer is formed with friction-increasing patterns, and the friction-increasing patterns extend obliquely to the axial direction of the wire feeding wheel.

[0021] Preferably, the lifting and lowering adjustment assembly comprises a fixed seat, a sliding seat, an adjusting member, an elastic member and a connecting member, the fixed seat is connected to the housing, a sliding hole and a sliding groove extending in the up-down direction are formed on the fixed seat; the sliding seat is provided with a matching sliding column protruding at a position corresponding to the sliding hole, the sliding seat is provided with a sliding block extending at a position corresponding to the sliding groove, the sliding column is slidably inserted into the sliding hole and the sliding block is slidably matched with the sliding groove, so that the sliding seat can slide up and down relative to the fixed seat;

[0022] The adjusting member is in the form of a long rod structure, comprising a knob head, a polished rod section and a threaded section connected in sequence, the fixing seat is provided with a screw hole adapted to the threaded section, the sliding seat is provided with a through hole adapted to the polished rod section, the threaded section is threadedly matched with the screw hole, the polished rod section is inserted into the through hole and rotatably matched with the through hole;

[0023] The elastic member is arranged between the fixed seat and the sliding seat, and the elastic member is arranged to: make the sliding seat have a movement tendency away from the fixed seat;

[0024] The connecting member is in the form of a long rod structure and has a connecting section adapted to the inner diameter of the pressure wheel. The sliding seat is provided with a connecting hole adapted to the end of the connecting member. The end of the connecting member is detachably connected to the connecting hole. The pressure wheel is rotatably arranged on the connecting section, and a second bearing is provided between the pressure wheel and the connecting section.

[0025] Preferably, the arc welding wire feeder also includes a first wire guide tube and a second wire guide tube, and the first wire guide tube and the second wire guide tube are both horizontally arranged along the wire feeding path, the first wire guide tube is located between the wire release assembly and the wire feeding wheel, and the second wire guide tube is located on the side of the wire feeding wheel away from the wire release assembly.

[0026] Preferably, the first wire guide tube is made of plastic material, the second wire guide tube is made of metal material, and one end of the first wire guide tube close to the wire release assembly is formed with a trumpet-shaped opening facing the wire release assembly.

[0027] Preferably, a correction ring is provided between the wire release assembly and the first wire guide tube, the correction ring is in an inverted U-shape, the lower end of which is connected to the shell, and the upper end has a semicircular correction portion, and the correction portion is coaxial with the first wire guide tube.

[0028] The arc welding wire feeder described in the utility model has the advantages that:

[0029] 1. The utility model arranges a soft friction-increasing layer on the outer circumference of the wire feeding wheel to increase the relative friction between the wire feeding wheel and the welding wire, so that the wire feeding wheel can drive the welding wire to be transported forward when rotating, meeting the requirement of stable welding wire transportation. The utility model replaces the groove structure in the prior art with the soft friction-increasing layer, so that the specification of welding wire that can be transported by the wire feeding wheel is not limited by the size of the groove, and cooperates with the clamping wheel that can be raised and lowered to make the wire feeding machine of the utility model adaptable to welding wires of different diameters, and the applicability and compatibility are significantly improved compared with the prior art;

[0030] 2. The utility model provides a bidirectional support frame to support the supporting shaft from both ends, so that the force on both sides of the supporting shaft is evenly applied, avoiding the problem of significantly increased relative friction caused by concentrated gravity of the welding wire roll when force is applied on one side, and further reducing the rotational friction of the supporting shaft by providing a first bearing between the supporting shaft and the bearing seat, so that the rotation and wire unloading process of the welding wire roll is smooth, and the phenomenon of jamming during the wire unloading process is less likely to occur, which can effectively reduce the risk of welding wire breakage during the wire unloading process and improve the continuity and stability of the wire feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the appearance structure of an arc welding wire feeder described in this embodiment;

[0032] Figure 2 It is a schematic diagram of the internal structure of an arc welding wire feeder according to this embodiment after a wire feeder reel is installed;

[0033] Figure 3 yes Figure 2 A schematic diagram of the structure in the normal direction;

[0034] Figure 4 It is a schematic diagram of the internal structure of an arc welding wire feeder described in this embodiment after the wire feeding reel is removed;

[0035] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0036] Figure 6 is a schematic diagram of the matching structure between the first driving member and the wire feeding wheel in this embodiment;

[0037] Figure 7 is a schematic diagram of the matching structure of the wheel hub and the soft friction-increasing layer in this embodiment;

[0038] Figure 8 is a schematic diagram of the assembly structure of the lifting and lowering adjustment assembly and the clamping wheel described in this embodiment;

[0039] Fig. 9 yes Figure 8 Exploded view of.

[0040] Explanation of the accompanying drawings: 1-shell, 2-wire release assembly, 21-supporting shaft, 22-support frame, 23-bearing seat, 24-first bearing, 3-wire feeding wheel, 31-wheel hub, 311-groove, 32-soft friction increasing layer, 321-inner convex part, 4-first driving member, 5-pressure wheel, 6-lifting adjustment assembly, 61-fixed seat, 611-slide hole, 612-slide groove, 613-screw hole, 62-sliding seat, 621-slide column, 622-slider, 623-through hole, 63-adjusting member, 631-knob head, 632-light rod section, 633-threaded section, 64-elastic member, 65-connecting member, 66-boss, 7-first wire guide tube, 71-trumpet-shaped opening, 8-second wire guide tube, 9-correction ring, 91-correction part, 10-wire feeding disk. DETAILED DESCRIPTION

[0041] like Figure 1-Figure 9 As shown, the arc welding wire feeder described in the utility model comprises:

[0042] Shell 1 is a square cabin structure made of steel plate, and is hollow inside for installing various components.

[0043] The wire unwinding assembly 2 is arranged in the shell 1, specifically located on one side of the shell 1. The wire unwinding assembly 2 includes a supporting shaft 21 for supporting the welding wire coil. Specifically, the welding wire coil is usually wound on the wire feeding reel 10. In this embodiment, the supporting seat is penetrated through the inner ring of the wire feeding reel 10 to support the wire feeding reel 10.

[0044] The wire feeding wheel 3 is arranged on one side of the wire unwinding assembly 2, that is, the other side of the shell 1, and corresponds to the wire unwinding assembly 2. Specifically, the upper edge of the wire feeding wheel 3 is flush with the conveying path of the welding wire released by the wire unwinding assembly 2, so that the released welding wire can be carried on the wire feeding wheel 3, and then the wire feeding wheel 3 can drive the welding wire to be conveyed forward when it rotates.

[0045] Specifically, the wire feeding wheel in the prior art is usually made of metal material with a smooth surface and a low friction coefficient, which cannot provide sufficient friction to convey the welding wire. Therefore, the prior art adopts the method of setting a groove, and embeds the welding wire into the groove during wire feeding. The groove is used to increase the contact area between the welding wire and the wire feeding wheel, thereby increasing the relative friction. However, the groove will also limit the diameter of the welding wire that can be conveyed.

[0046] Based on the above technical problems, this embodiment adopts another solution: by changing the material of the surface of the wire feeding wheel 3 to increase the surface friction of the wire feeding wheel 3, so that the surface of the wire feeding wheel 3 can also meet the surface friction requirements of conveying welding wire while maintaining a flat surface. This embodiment is specifically implemented as follows:

[0047] The wire feeding wheel 3 is divided into two parts. The inner part is a wheel hub 31, which is made of metal material. The wheel hub 31 mainly plays a supporting role. The soft friction increasing layer 32 is made of a soft material with large surface friction, and is sleeved on the outer peripheral surface of the wheel hub 31, so that the outer peripheral surface of the wire feeding wheel 3 is soft and has a large surface friction structure. In this way, when the wire is in contact with the welding wire for conveying the welding wire, sufficient relative friction can be provided, so that the welding wire can be conveyed forward following the rotation of the wire feeding wheel 3.

[0048] The first driving member 4 is linked with the wire feeding wheel 3 to drive the wire feeding wheel 3 to rotate. The first driving member 4 is usually a motor, which is connected to the axis of the hub 31 of the wire feeding wheel 3 through a coupling, and the wire feeding wheel 3 can be driven to rotate by the first driving member 4.

[0049] The clamping wheel 5 is arranged above the wire feeding wheel 3 and is slidably connected to the shell 1 through a lifting and adjusting assembly 6, so that the clamping wheel 5 can slide up and down to adjust the distance between the clamping wheel 5 and the wire feeding wheel 3. Specifically, the clamping wheel 5 and the wire feeding wheel 3 are located on the same plane, and the gap formed between the clamping wheel 5 and the wire feeding wheel 3 is the path for welding wire transportation. When feeding the wire, the outer peripheral surfaces of the clamping wheel 5 and the wire feeding wheel 3 are tightly attached to the outer peripheral surface of the welding wire. When the wire feeding wheel 3 is driven to rotate by the first driving member 4, the wire feeding wheel 3 drives the welding wire to be transported forward.

[0050] Furthermore, in the present embodiment, the wire release assembly 2 comprises a support frame 22, a bearing seat 23 and a first bearing 24. The support frame 22 is a tripod structure. The number of the support frame 22, the bearing seat 23 and the first bearing 24 are two. The two support frames 22 are relatively parallel. The spacing between the two support frames 22 is adapted to the length of the aforementioned supporting shaft 21. The two bearing seats 23 are respectively arranged on the two support frames 22 and are also relatively parallel. The two ends of the supporting shaft 21 are respectively detachably connected to the two bearing seats 23. For example, the bearing seat 23 is provided with an axial hole adapted to the supporting shaft 21, and the bearing seat 23 is a split structure, including an upper and lower seat body ( Figure 3 , Figure 4 Only the lower half is shown in the figure), the two parts of the seat body are semicircular, and are detachably connected by means of buckles or bolts, so that the upper part of the seat body can be removed upwards. When installing the wire feeding disc 10, the upper part of the seat body is removed, and then the wire feeding disc 10 is installed on the supporting shaft 21 and connected, so that the wire feeding disc 10 can rotate synchronously with the supporting shaft 21, and then the supporting shaft 21 is installed on the support frame 22, and the two ends of the supporting shaft 21 are installed on the lower half of the seat body of the two supporting frames 22, and then the upper half of the seat body is covered, and the wire feeding disc 10 can be installed on the support frame 22. In order to reduce the rotational friction of the supporting shaft 21, two first bearings 24 are respectively sleeved on both ends of the supporting shaft 21.

[0051] Furthermore, in the present embodiment, the support frame 22 and the housing 1 are an integrated structure, both of which are made of steel material, and the supporting shaft 21 is made of plastic material, which can reduce the weight of the supporting shaft 21.

[0052] Furthermore, in this embodiment, the soft friction-increasing layer 32 is made of rubber, plastic or silicone material. The above three materials are all soft and have large surface friction. After being sleeved on the outer peripheral surface of the hub 31, they can provide sufficient relative friction for wire feeding.

[0053] Furthermore, in the present embodiment, at least one outer peripheral surface of the wheel hub 31 is formed with a groove 311 which is recessed radially inwardly of the wheel hub 31, and the groove 311 is a U-shaped groove. The inner surface of the soft friction enhancing layer 32 is formed with an inner convex portion 321 which protrudes inwardly at a position corresponding to the groove 311, and the shape of the inner convex portion 321 is matched with the groove 311, and the inner convex portion 321 is embedded in the groove 311. The matching structure of the inner convex portion 321 and the groove 311 can increase the contact area between the soft friction enhancing layer 32 and the wheel hub 31, making the connection between the two tighter, and on the other hand, it can also limit the relative rotation of the soft friction enhancing layer 32 and the wheel hub 31 to avoid the soft friction enhancing layer 32 and the wheel hub 31 from rotating at the same time.

[0054] Furthermore, in this embodiment, a plurality of friction increasing patterns (not shown in the figure) are formed on the outer peripheral surface of the soft friction increasing layer 32, and the friction increasing patterns extend obliquely to the axis of the wire feeding wheel 3. The friction increasing patterns can further increase the surface friction of the soft friction increasing layer 32, thereby making the wire feeding process more stable.

[0055] Further, in this embodiment, the details are as follows Figure 8 , Fig. 9 As shown, the lifting and adjusting assembly 6 includes a fixed seat 61, a sliding seat 62, an adjusting member 63, an elastic member 64 and a connecting member 65. The fixed seat 61 is L-shaped, one side plate is connected to the housing 1, and the other side plate extends inward and is formed with a sliding hole 611 and a sliding groove 612 extending in the up-down direction;

[0056] The sliding seat 62 is in an inverted L shape, and a sliding column 621 is protruded from one side plate at a position corresponding to the sliding hole 611, and a sliding block 622 is extended at a position corresponding to the sliding groove 612. The sliding column 621 is slidably inserted into the sliding hole 611, and the sliding block 622 is slidably matched with the sliding groove 612, so that the sliding seat 62 can slide up and down relative to the fixed seat 61.

[0057] The adjusting member 63 is specifically a screw rod, comprising a knob head 631, a bare rod section 632 and a threaded section 633 connected in sequence. A screw hole 613 adapted to the threaded section 633 is provided on the fixed seat 61, and a through hole 623 is provided on the sliding seat 62 at a position coaxial with the screw hole 613. The adjusting member 63 passes through the through hole 623 and extends into the screw hole 613, so that the threaded section 633 forms a threaded fit with the screw hole 613, and the bare rod section 632 is located in the through hole 623 and rotates in fit with the through hole 623.

[0058] The elastic member 64 is specifically a spring, which is arranged between the fixed seat 61 and the sliding seat 62, with its two ends respectively abutting against the fixed seat 61 and the sliding seat 62. The elastic member 64 is arranged to make the sliding seat 62 have a movement tendency away from the fixed seat 61, that is, when the sliding seat 62 slides downward, the spring is compressed to accumulate elastic properties.

[0059] Therefore, when the knob head 631 above is rotated, the adjusting member 63 is driven to rotate, and the relative rotation of the threaded section 633 and the screw hole 613 will cause the adjusting member 63 to move downward relative to the fixed seat 61, and at this time, the sliding seat 62 will be driven to slide downward relative to the fixed seat 61. At this time, the spring accumulates elastic potential energy. When the sliding seat 62 needs to be moved up, it is only necessary to rotate the adjusting member 63 in the opposite direction. Since the knob head 631 no longer presses against the upper surface of the sliding seat 62, the spring releases the elastic potential energy to push the sliding seat 62 upward, and move the sliding seat 62 up until it contacts the knob head 631 again, thereby realizing the up and down sliding adjustment of the sliding seat 62.

[0060] The connecting member 65 is specifically a long rod structure, having a connecting section adapted to the inner diameter of the clamping wheel 5. A connecting hole adapted to the end of the connecting member 65 is provided on the other side plate of the sliding seat 62, specifically a threaded hole. The end of the connecting member 65 has an external thread, and the end of the connecting member 65 is threadedly matched with the threaded hole to achieve a detachable connection. The clamping wheel 5 is rotatably sleeved on the connecting section, so that the clamping wheel 5 can be driven to move up and down by the up and down sliding of the sliding seat 62, thereby adjusting the distance between the clamping wheel 5 and the wire feeding wheel 3. A second bearing is also provided between the clamping wheel 5 and the connecting section to reduce the relative rotation friction between the clamping wheel 5 and the connecting section.

[0061] Furthermore, in the present embodiment, the arc welding wire feeder also includes a first wire guide tube 7 and a second wire guide tube 8, and the first wire guide tube 7 and the second wire guide tube 8 are both horizontally arranged along the wire feeding path, the first wire guide tube 7 is located between the wire unwinding assembly 2 and the wire feeding wheel 3, and the second wire guide tube 8 is located on the side of the wire feeding wheel 3 away from the wire unwinding assembly 2, and the first wire guide tube 7 and the second wire guide tube 8 are both tubular structures with hollow interiors, and the welding wire passes through the first wire guide tube 7 and the second wire guide tube 8, and the first wire guide tube 7 and the second wire guide tube 8 guide the welding wire to ensure that the welding wire is smoothly transported forward.

[0062] Furthermore, in the present embodiment, the first wire guide tube 7 is made of plastic material, and the second wire guide tube 8 is made of metal material. A trumpet-shaped opening 71 facing the wire release assembly 2 is formed at one end of the first wire guide tube 7 close to the wire release assembly 2, and the trumpet-shaped opening 71 can facilitate the welding wire to enter the first wire guide tube 7.

[0063] Furthermore, in the present embodiment, a correction ring 9 is provided between the wire unwinding assembly 2 and the first wire guide tube 7. The correction ring 9 is inverted U-shape, with its lower end connected to the shell body 1, and an upper end having a semicircular correction portion 91. The correction portion 91 is coaxial with the first wire guide tube 7, and the correction portion 91 is used to adjust the horizontal position of the welding wire from the wire feeding reel 10 to the wire feeding wheel 3, correct the direction of the pulling force to reduce the horizontal component of the pulling force, and reduce the risk of the welding wire breakage.

[0064] The following will combine the above content to fully explain the working process of the arc welding wire feeder of this embodiment:

[0065] The supporting shaft 21 is removed, the wire feeding reel 10 of the welding wire coil is installed on the supporting shaft 21 , and then the supporting shaft 21 is installed on the support frame 22 .

[0066] The knob head 631 is turned according to the diameter of the welding wire to adjust the up and down position of the sliding seat 62, thereby driving the clamping wheel 5 to move up and down, and adjusting the distance between the clamping wheel 5 and the wire feeding wheel 3 to be close to the diameter of the welding wire.

[0067] The welding wire is pulled outward so that it passes through the correction ring 9, the first wire guide tube 7, the gap between the wire feeding wheel 3 and the clamping wheel 5, and the second wire guide tube 8 in sequence, thereby completing the laying process of the welding wire.

[0068] The wire feeding wheel 3 is driven to rotate by the first driving member 4. Since the clamping wheel 5 presses the welding wire downward to be close to the wire feeding wheel 3, and the surface of the wire feeding wheel 3 has a soft friction increasing layer 32, the wire feeding wheel 3 drives the welding wire to be transported forward under the action of the relative friction between the wire feeding wheel 3 and the welding wire to realize wire feeding. As the wire feeding wheel 3 continues to rotate, the welding wire on the wire feeding reel 10 is continuously pulled outward for wire feeding.

[0069] The utility model arranges a soft friction-increasing layer 32 on the outer circumference of the wire feeding wheel 3 to increase the relative friction between the wire feeding wheel 3 and the welding wire, so that the wire feeding wheel 3 can drive the welding wire to be transported forward when it rotates, thereby meeting the requirement of stable welding wire transportation. The utility model replaces the groove 311 structure in the prior art with the soft friction-increasing layer 32, so that the specification of the welding wire that can be transported by the wire feeding wheel 3 is not limited by the size of the groove 311, and cooperates with the clamping wheel 5 that can be raised and lowered to make the wire feeding machine of the utility model adaptable to welding wires of different diameters, and the applicability and compatibility are significantly improved compared with the prior art.

[0070] The utility model provides a bidirectional support frame 22 to support the supporting shaft 21 from both ends, so that the two sides of the supporting shaft 21 are evenly stressed, avoiding the problem of significantly increased relative friction caused by concentrated gravity of the welding wire roll when only one side is stressed, and further reduces the rotational friction of the supporting shaft 21 by providing a first bearing 24 between the supporting shaft 21 and the bearing seat 23, so that the rotation and wire unwinding process of the welding wire roll is smooth, and the phenomenon of jamming during the wire unwinding process is less likely to occur, which can effectively reduce the risk of welding wire breakage during the wire unwinding process and improve the continuity and stability of the wire feeding process.

[0071] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0072] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. An arc welding wire feeder, characterized in that: include: case; A wire unwinding assembly is disposed in the housing, and the wire unwinding assembly includes a supporting shaft for carrying a welding wire coil; A wire feeding wheel, which is arranged at one side of the wire unwinding assembly and corresponds to the wire unwinding assembly, and is used to convey the welding wire unwound by the wire unwinding assembly; the wire feeding wheel comprises a hub and a soft friction-increasing layer sleeved on the outer peripheral surface of the hub, and the wire feeding wheel is rotatably connected to the shell; A first driving member, which is linked with the wire feeding wheel and is used to drive the wire feeding wheel to rotate; The clamping wheel is rotatably arranged above the wire feeding wheel and is slidably connected to the shell through a lifting and adjusting assembly, so that the clamping wheel can slide up and down to adjust the distance between the clamping wheel and the wire feeding wheel.

2. The arc welding wire feeder according to claim 1, characterized in that: The wire release assembly includes a support frame, a bearing seat and a first bearing. The number of the support frame, the bearing seat and the first bearing are all two. The two support frames are arranged opposite to each other. The two bearing seats are respectively arranged on the two support frames. The two ends of the supporting shaft are respectively detachably connected to the two bearing seats, and the two first bearings are respectively sleeved on the two ends of the supporting shaft.

3. The arc welding wire feeder according to claim 2, characterized in that: The support frame and the shell are an integrated structure, and the support frame is made of steel material; the supporting shaft is made of plastic material.

4. The arc welding wire feeder according to claim 1, characterized in that: The soft friction-increasing layer is made of rubber, plastic or silicone material.

5. The arc welding wire feeder according to claim 4, characterized in that: A groove recessed radially inwardly is formed on at least one outer peripheral surface of the hub, and an inner surface of the soft friction-increasing layer protrudes inwardly at a position corresponding to the groove to form an inner convex portion, which is embedded in the groove.

6. The arc welding wire feeder according to claim 1, 4 or 5, characterized in that: The outer peripheral surface of the soft friction-increasing layer is formed with friction-increasing patterns, and the friction-increasing patterns extend obliquely to the axial direction of the wire feeding wheel.

7. The arc welding wire feeder according to claim 1, characterized in that: The lifting and adjusting assembly comprises a fixed seat, a sliding seat, an adjusting member, an elastic member and a connecting member, the fixed seat is connected to the housing, a sliding hole and a sliding groove extending in the up-down direction are formed on the fixed seat; the sliding seat is provided with a matching sliding column protruding at a position corresponding to the sliding hole, and a sliding block is extended at a position corresponding to the sliding groove of the sliding seat, the sliding column is slidably arranged in the sliding hole and the sliding block is slidably matched with the sliding groove, so that the sliding seat can slide up and down relative to the fixed seat; The adjusting member is in the form of a long rod structure, comprising a knob head, a polished rod section and a threaded section connected in sequence, the fixing seat is provided with a screw hole adapted to the threaded section, the sliding seat is provided with a through hole adapted to the polished rod section, the threaded section is threadedly matched with the screw hole, the polished rod section is inserted into the through hole and rotatably matched with the through hole; The elastic member is arranged between the fixed seat and the sliding seat, and the elastic member is arranged to: make the sliding seat have a movement tendency away from the fixed seat; The connecting member is in the form of a long rod structure and has a connecting section adapted to the inner diameter of the pressure wheel. The sliding seat is provided with a connecting hole adapted to the end of the connecting member. The end of the connecting member is detachably connected to the connecting hole. The pressure wheel is rotatably arranged on the connecting section, and a second bearing is provided between the pressure wheel and the connecting section.

8. The arc welding wire feeder according to claim 1, characterized in that: It also includes a first wire guide tube and a second wire guide tube, which are both horizontally arranged along the wire feeding path, the first wire guide tube is located between the wire release assembly and the wire feeding wheel, and the second wire guide tube is located on the side of the wire feeding wheel away from the wire release assembly.

9. The arc welding wire feeder according to claim 8, characterized in that: The first wire guide tube is made of plastic material, the second wire guide tube is made of metal material, and one end of the first wire guide tube close to the wire release assembly is formed with a trumpet-shaped opening facing the wire release assembly.

10. The arc welding wire feeder according to claim 8 or 9, characterized in that: A correction ring is provided between the wire release assembly and the first wire guide tube. The correction ring is in an inverted U shape, with its lower end connected to the shell and an upper end having a semicircular correction portion, and the correction portion is coaxial with the first wire guide tube.

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