Wire releasing mechanism of welding wire spool

Abstract

The utility model provides a wire releasing mechanism of a welding wire spool. The tip cone assembly is used for being connected with a welding wire spool and can drive the welding wire spool to rotate, the transmission assembly is fixedly connected with the tip cone assembly, the transmission assembly comprises a flange cylinder, a transmission shaft and a bearing set, part of the transmission shaft is contained in the flange cylinder, the two ends of the transmission shaft stretch out of the flange cylinder, and the bearing set is installed on the transmission shaft. The flange cylinder is connected with a rack provided with a wire releasing mechanism, and the first extending end of the transmission shaft is connected with the tip cone assembly. The driving assembly comprises a motor, a first belt pulley installed on an output shaft of the motor, a second belt pulley installed at the second extending end of the transmission shaft and a belt, the second belt pulley is connected with the first belt pulley through the belt, and the diameter of the second belt pulley is larger than that of the first belt pulley. The wire releasing mechanism provided by the utility model can drive the welding wire spool with larger weight to realize automatic wire releasing, and has the advantages of compact design and high wire releasing speed.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding wire production, and in particular relates to a welding wire I-wheel wire-releasing mechanism. Background Art

[0002] Welding wire is a welding material used as a filler metal or a conductive metal wire, including carbon steel welding wire, low alloy structural steel welding wire, alloy structural steel welding wire, stainless steel welding wire and non-ferrous metal welding wire, etc. The surface of the welding wire is not coated with anti-oxidation flux. It is used as a filler metal in gas welding and tungsten inert gas shielded arc welding; in submerged arc welding, electroslag welding and other metal arc shielded arc welding, it is both a filler metal and a conductive electrode.

[0003] After the welding wire is produced, it is first wound on an I-shaped wheel, then unwound through a welding wire I-shaped wheel unwinding device equipped with an I-shaped wheel, and then wound onto a welding wire reel through a layer winding machine. The welding wire on the welding wire reel is wound in regular layers and the weight specifications of the welding wire wound on the welding wire reel are unified for easy shipment.

[0004] At present, all major welding wire factories use I-shaped wheels with a diameter of 800mm and a weight of 1.2 tons, and use small wire unwinding equipment. In order to save costs and labor, a larger I-shaped wheel (with a diameter of 1140mm and a weight of 2.5 tons) is used to store welding wire, which requires the development of a new welding wire I-shaped wheel unwinding device. Correspondingly, the unwinding mechanism used to drive the I-shaped wheel to unwind the wire in the unwinding device needs a new design. Utility Model Content

[0005] The utility model aims to provide a wire-releasing mechanism for large I-shaped wheel wire-releasing, so as to solve the problems raised in the background technology.

[0006] To achieve the above object, the utility model provides a welding wire I-wheel unwinding mechanism, the welding wire I-wheel comprising two first side discs and a second side disc arranged at intervals, and a center cylinder connected to the first side disc and the second side disc at both ends, the welding wire is wound on the center cylinder, and the unwinding mechanism comprises:

[0007] A top cone assembly, the top cone assembly is used to be connected to the first side plate and can drive the welding wire I-shaped wheel to rotate;

[0008] A transmission assembly, the transmission assembly comprising a flange cylinder, a transmission shaft partially received in the flange cylinder and extending out of the flange cylinder at both ends, and a bearing group mounted on the transmission shaft and located in the flange cylinder, the flange cylinder being connected to a frame on which the wire-releasing mechanism is mounted, and a first extending end of the transmission shaft being connected to the top cone assembly;

[0009] A driving assembly, the driving assembly comprising a motor, a first pulley mounted on an output shaft of the motor, a second pulley mounted on a second protruding end of the transmission shaft and fixedly connected to the transmission shaft, and a belt, wherein the second pulley is connected to the first pulley through the belt and the diameter of the second pulley is larger than that of the first pulley;

[0010] The motor drives the first pulley, and drives the second pulley and the transmission shaft fixedly connected to the second pulley to rotate through the first pulley. The transmission shaft drives the welding wire I-shaped pulley to rotate through the top cone assembly to realize automatic wire feeding.

[0011] In a specific embodiment, the first side disc includes a first side disc body, a first conical hole located in the middle of the first side disc body, and at least two insertion holes surrounding the first conical hole. The top cone assembly includes a fixed cone plate mounted on the transmission shaft, positioning holes opened at both ends of the fixed cone plate, a first top cone arranged in the middle of the fixed cone plate and fixedly connected to the fixed cone plate, and two second top cones respectively installed in the two positioning holes and fixedly connected to the fixed cone plate. The first top cone is fixedly connected to the transmission shaft, the first top cone is used to be correspondingly inserted into the first conical hole and abut against the hole wall of the first conical hole, and the two second top cones are used to be correspondingly inserted into the insertion holes of the first side disc.

[0012] In a specific embodiment, the first top cone includes a cone body fixedly connected to the fixed cone plate, a groove formed by being recessed inward from the surface of the cone body toward the I-shaped wheel, and a mounting hole formed through the bottom of the groove, the first protruding end of the transmission shaft is inserted into the groove through the mounting hole, and the top cone assembly also includes a first expansion sleeve installed in the groove and connecting the transmission shaft to the cone body.

[0013] In a specific embodiment, the second top cone includes a mounting seat installed in the positioning hole, a through hole formed through the mounting seat, a cover plate covering the end of the mounting seat away from the welding wire I-wheel and fixedly connected to the mounting seat, a cone head for inserting into the jack, and a spring member clamped between the cone head and the cover plate, the through hole includes a first through hole and a second through hole that are connected to each other, the first through hole is close to the I-wheel and the aperture of the first through hole is smaller than the aperture of the second through hole, the cone head includes a cylindrical cone seat, a head connected to the cone seat and smaller in size than the cone seat, and a mounting groove formed by a surface of the cone seat away from the head, the cone seat is accommodated in the through hole and the head extends out of the through hole, and the two ends of the spring member are respectively abutted against the bottom of the mounting groove and the cover plate.

[0014] In a specific embodiment, the bearing group includes a first bearing respectively installed on one end of the transmission shaft close to the top cone assembly, a second bearing installed on the end of the transmission shaft away from the top cone assembly, and a third bearing located between the first bearing and the second bearing, wherein the first bearing and the second bearing are used to bear the radial force of the transmission shaft, and the third bearing is used to bear the axial force of the transmission shaft.

[0015] In a specific embodiment, the first bearing and the second bearing are cylindrical roller bearings, and the third bearing is a four-point contact ball bearing.

[0016] In a specific embodiment, the transmission assembly also includes two limit plates for limiting the bearing group, one end of the first bearing abuts against the flange cylinder and the other end abuts against the third bearing, and a limit plate is respectively provided at one end of the second bearing away from the first bearing and one end of the third bearing away from the first bearing.

[0017] In a specific embodiment, the transmission assembly further includes two end covers, and the two end covers are respectively arranged at two ends of the flange cylinder.

[0018] In a specific embodiment, the driving assembly further includes a brake unit which is sleeved on the transmission shaft and connected to the transmission shaft, and the brake unit is arranged between the second pulley and the flange cylinder.

[0019] In a specific embodiment, the brake unit includes a connecting sleeve that is sleeved on the transmission shaft and fixedly connected to the transmission shaft, a brake disc installed on the connecting sleeve, and at least one brake arranged along the peripheral direction of the brake disc, and the brake is connected to a frame on which the wire release mechanism is installed.

[0020] The beneficial effects of the utility model include at least:

[0021] 1. The welding wire I-wheel wire-releasing mechanism provided by the utility model comprises a top cone assembly used to be connected to the welding wire I-wheel and capable of driving the welding wire I-wheel to rotate, a transmission assembly fixedly connected to the top cone assembly, and a drive assembly capable of driving the top cone assembly to rotate through the transmission assembly, wherein the transmission assembly comprises a flange cylinder, a transmission shaft partially accommodated in the flange cylinder and extending out of the flange cylinder at both ends, and a bearing group installed on the transmission shaft and located in the flange cylinder, the flange cylinder is connected to a frame for installing the wire-releasing mechanism, and a first extending end of the transmission shaft is connected to the top cone assembly; the drive assembly comprises a motor, a first belt installed on the output shaft of the motor A wheel, a second pulley installed at the second protruding end of the transmission shaft and fixedly connected to the transmission shaft, and a belt, the second pulley is connected to the first pulley by a belt and the diameter of the second pulley is larger than the first pulley, the motor drives the first pulley, and drives the second pulley and the transmission shaft fixedly connected to the second pulley to rotate through the first pulley, and the transmission shaft drives the welding wire I-shaped wheel to rotate through the top cone assembly to realize automatic wire release; the wire release mechanism provided by the utility model can drive the welding wire I-shaped wheel with a heavier weight to realize automatic wire release, and has the advantages of compact design and high wire release linear speed (30m / s).

[0022] 2. The transmission assembly in the wire releasing mechanism provided by the utility model includes a flange cylinder, a transmission shaft partially accommodated in the flange cylinder and extending out of the flange cylinder at both ends, and a bearing group installed on the transmission shaft and located in the flange cylinder, the bearing group includes a first bearing installed at one end of the transmission shaft adjacent to the top cone assembly, a second bearing installed at one end of the transmission shaft away from the top cone assembly, and a third bearing located between the first bearing and the second bearing, wherein the first bearing and the second bearing are used to bear the radial force of the transmission shaft, and the third bearing is used to bear the axial force of the transmission shaft; different bearings are used to bear the radial force and the axial force respectively, so that the calculation amount of bearing selection can be reduced, the selection is convenient, and the service life of each bearing can be increased.

[0023] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a welding wire I-shaped pulley provided in one embodiment of the utility model.

[0025] Figure 2 A schematic diagram of a three-dimensional structure of the connection between an I-shaped wheel and a wire-releasing mechanism provided in one embodiment of the utility model;

[0026] Figure 3 It is a partial stereoscopic diagram of the wire-releasing mechanism;

[0027] Figure 4 for Figure 2 A schematic diagram of the planar structure of the wire-releasing mechanism at one angle is shown;

[0028] Figure 5 for Figure 4 A cross-sectional view of line AA shown;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the first top cone in the wire-releasing mechanism;

[0030] Figure 7 It is a schematic diagram of a three-dimensional exploded view of the second top cone in the wire-releasing mechanism. DETAILED DESCRIPTION

[0031] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention can be defined and covered by a variety of different implementations according to the claims.

[0032] See also Figures 1 to 7 The utility model provides a welding wire spool wire releasing mechanism 100, wherein the wire releasing mechanism 100 is connected to the spool 200 and is used to drive the spool to release the wire.

[0033] In the present invention, the diameter of the welding wire spool 200 is 1140 mm, and the weight of the spool wound with welding wire is 2.5 tons. The wire release mechanism is used to drive the spool to release the wire, and the wire release line speed can reach 30 m / s.

[0034] In the present invention, the welding wire I-shaped wheel 200 includes two first side discs 201 and second side discs 202 spaced apart, and a center tube 203 whose two ends are respectively connected to the first side disc 201 and the second side disc 202 , and the welding wire is wound on the center tube 203 .

[0035] The first side plate 201 includes a first side plate body 2011 , a first conical hole 2012 located in the middle of the first side plate body 2011 , and at least two insertion holes 2013 surrounding the first conical hole 2012 .

[0036] The wire unwinding mechanism 100 includes a top cone assembly 10 connected to the first side disk 201 and capable of driving the welding wire spool 200 to rotate, a transmission assembly 20 connected to the top cone assembly 10, and a drive assembly 30 connected to the transmission assembly 20. The drive assembly 30 can drive the top cone assembly 10 to rotate through the transmission assembly 20, thereby driving the spool to rotate and unwind the wire.

[0037] The top cone assembly 10 includes a fixed cone plate 11, positioning holes opened at both ends of the fixed cone plate 11, a first top cone 12 arranged in the middle of the fixed cone plate 11 and fixedly connected to the fixed cone plate 11, and two second top cones 13 respectively installed in the two positioning holes and fixedly connected to the fixed cone plate 11, the first top cone 12 is fixedly connected to the transmission assembly 20, the first top cone 12 is used to be correspondingly inserted into the first cone hole 2012 and abut against the hole wall of the first cone hole 2012, and the two second top cones 13 are used to be correspondingly inserted into the insertion hole 2013 of the first side plate 201.

[0038] In this embodiment, the fixed cone plate 11 is fixedly connected to the transmission assembly 20 through the first top cone 12, and the second top cone 13 is fixedly connected to the fixed cone plate 11, so that the driving assembly 30 drives the transmission assembly 20 to rotate, and then drives the top cone assembly 10 connected to the transmission assembly to rotate, thereby driving the I-shaped wheel to rotate.

[0039] By providing two second top cones 13 connected to the first side disc, the stability of the wire unwinding mechanism can be increased and the I-shaped wheel can be prevented from slipping during rotation.

[0040] In this embodiment, the fixed connection between the fixed cone plate 11 and the first top cone 12 may be a threaded connection, a pin connection, or the like.

[0041] In this embodiment, the fixed cone plate 11 is a plate body whose middle width is greater than the widths at both ends.

[0042] Please refer to Figure 5 Preferably, the first top cone 12 includes a cone 121 fixedly connected to the fixed cone plate 11, a groove 122 formed by being recessed inward from the cone 121 toward the surface of the welding wire I-shaped wheel 200, and a mounting hole 123 formed through the bottom of the groove 122.

[0043] In this embodiment, the shape of the cone matches the shape of the first cone hole 2012 , and when the wire unwinding mechanism supports the I-shaped wheel 200 , the cone is inserted into the first cone hole 2012 and abuts against the hole wall of the first cone hole 2012 .

[0044] In this embodiment, the cone 121 is a cone structure that is smaller at one end toward the I-shaped wheel and larger at one end away from the I-shaped wheel. From the tail top mechanism to the wire releasing mechanism, the cone 121 includes a first cone, a second cone and a third cone connected in sequence, wherein the first cone is a cylindrical structure, the second cone and the third cone are both truncated cone structures, the diameter of the bottom surface of the second cone is the same as the diameter of the bottom surface of the first cone, the diameter of the top surface of the second cone is smaller than the diameter of the bottom surface of the second cone and is the same as the diameter of the bottom surface of the third cone, and the diameter of the top surface of the third cone is smaller than the diameter of the bottom surface of the third cone.

[0045] The groove is formed by being recessed inwardly from a surface of the third cone away from the first cone.

[0046] In this embodiment, the second cone and the third cone are inserted into the first cone hole 2012.

[0047] Please refer to Figure 6 Preferably, the second top cone 13 includes a mounting seat 131 installed in the positioning hole, a through hole 132 formed through the mounting seat, a cover plate 133 covering the end of the mounting seat 131 away from the welding wire I-shaped wheel 200 and fixedly connected to the mounting seat 131, a cone head 134 partially accommodated in the through hole 132, and a spring member 135 sandwiched between the cone head 134 and the cover plate 133, wherein the cone head 134 is used to be inserted into the jack.

[0048] In this embodiment, the mounting seat 131 includes a cylindrical first mounting seat 1311 and a cylindrical second mounting seat 1312, and the diameter of the first mounting seat 1311 is smaller than the diameter of the second mounting seat 1312, the first mounting seat 1311 is partially accommodated in the positioning hole, and the fixed cone plate 11 is fixedly connected to the second mounting seat 1312.

[0049] The through hole includes a first through hole and a second through hole that are connected. The first through hole is close to the I-shaped wheel and the aperture of the first through hole is smaller than the aperture of the second through hole. A step portion is formed at the position where the first through hole and the second through hole are connected, thereby limiting the movement of the cone head.

[0050] The cone head 134 includes a cylindrical cone seat 1341, a head 1342 connected to the cone seat 1341 and smaller in size than the cone seat 1341, and a mounting groove formed by being recessed inward from the surface of the cone seat 1341 away from the head 1342, the cone seat 1341 is completely accommodated in the through hole, and the head 1342 extends out of the through hole.

[0051] In this embodiment, the shape of the head 1342 matches the shape of the insertion hole. The two ends of the spring member 135 are respectively in contact with the bottom of the installation groove and the cover plate 133. In this embodiment, the elastic end of the spring member 135 is located in the installation groove and the non-elastic end of the spring member 135 is in contact with the cover plate, so that when the spring member 135 is compressed, the elastic force generated can push the cone head forward, so that the cone head 134 of the second top cone 13 can be automatically inserted into the insertion hole.

[0052] The transmission assembly 20 includes a flange cylinder 21, a transmission shaft 22 partially accommodated in the flange cylinder 21 and with both ends extending out of the flange cylinder 21, a bearing group 23 installed on the transmission shaft 22 and located in the flange cylinder 21, and two limiting rings 24 for limiting the bearing group 23. The flange cylinder 21 is connected to a frame on which the wire release mechanism is installed.

[0053] Preferably, the top cone assembly 10 also includes a first expansion sleeve 14 installed in the groove 122, the first protruding end of the transmission shaft 22 is inserted into the groove 122 through the mounting hole 123, and the transmission shaft 22 is connected to the cone 121 through the first expansion sleeve 14.

[0054] In this embodiment, the flange plate of the flange cylinder 21 is fixedly connected to the frame on which the wire releasing mechanism is installed.

[0055] In this embodiment, the fixed cone plate 11 is sleeved on the transmission shaft 22 and connected to the transmission shaft 22 via the first top cone 12 .

[0056] In this embodiment, the end of the transmission shaft 22 facing the welding wire I-shaped wheel 200 is the first protruding end of the transmission shaft, and the end away from the I-shaped wheel is the second protruding end of the transmission shaft 22. The first protruding end of the transmission shaft 22 extends out of the flange tube 21 and is connected to the cone of the first top cone 12 through the first expansion sleeve 14, and the second protruding end of the transmission shaft 22 extends out of the flange tube and is connected to the drive assembly.

[0057] Preferably, the bearing group 23 includes a first bearing 231 installed at one end of the transmission shaft 22 adjacent to the top cone assembly 10, a second bearing 232 installed at one end of the transmission shaft 22 away from the top cone assembly 10, and a third bearing 233 located between the first bearing 231 and the second bearing 232, wherein the first bearing 231 and the second bearing 232 are used to bear the radial force of the transmission shaft, and the third bearing 233 is used to bear the axial force of the transmission shaft.

[0058] In this embodiment, one end of the first bearing 231 abuts against the flange tube 21 and the other end abuts against the third bearing 233, and one end of the second bearing 232 away from the first bearing 231 and one end of the third bearing 233 away from the first bearing 231 are respectively provided with a limiting ring 24 sleeved on the transmission shaft 22.

[0059] It is understandable that, in order to facilitate the installation of the three bearings, a boss can also be processed on the transmission shaft, so that the three bearings can be limited in position.

[0060] In this embodiment, the first bearing 231 and the second bearing 232 are cylindrical roller bearings, and the third bearing 233 is a four-point contact ball bearing.

[0061] In the present invention, two of the three bearings are used to bear the radial force of the transmission shaft, and one of the three bearings is used to bear the axial force of the transmission shaft. In this way, it is convenient to select the bearings based on the axial force and the radial force respectively, and at the same time, the service life of the bearing group can be extended.

[0062] Preferably, the transmission assembly 20 further includes two end covers 25 respectively installed at both ends of the flange cylinder 21 , and the end covers 25 protect the flange cylinder 21 .

[0063] Preferably, the wire unwinding mechanism 100 further includes a fixing ring 40 located between the end cover 25 and the fixed cone plate 11 .

[0064] The driving assembly 30 includes a motor 31, a first pulley 32 mounted on the output shaft of the motor 31, a second pulley 33 mounted on the second protruding end of the transmission shaft 22 and fixedly connected to the transmission shaft 22, a belt 34, and a brake unit 35 sleeved on the transmission shaft 22 and fixedly connected to the transmission shaft 22, the second pulley 33 is connected to the first pulley 32 through the belt 34, and the diameter of the second pulley 33 is larger than that of the first pulley 32, and the brake unit 35 is arranged between the second pulley 33 and the flange cylinder 21. The motor 31 drives the first pulley 32, and drives the second pulley 33 and the transmission shaft 22 fixedly connected to the second pulley 33 to rotate through the first pulley 32, and the transmission shaft 22 drives the welding wire I-shaped wheel 200 to rotate through the top cone assembly 10 to realize automatic wire feeding.

[0065] The brake unit 35 is used to brake the driving assembly after the wire is paid out.

[0066] Preferably, the brake unit 35 includes a connecting sleeve 351 which is sleeved on the transmission shaft 22 and fixedly connected to the transmission shaft 22 , a brake disc 352 installed on the connecting sleeve 351 , and at least one brake 353 arranged along the peripheral direction of the brake disc 352 .

[0067] In this embodiment, the brake 353 is connected to a frame on which the wire releasing mechanism 100 is installed.

[0068] More preferably, the number of the brakes 353 is two, which are evenly distributed, and the brakes are pneumatic brakes.

[0069] Specifically, the brake 353 includes two brake pads that are disposed on both sides of the brake disc and are connected to each other, and a pneumatic component that drives the brake pads to clamp the brake disc.

[0070] In this embodiment, the brake unit 35 further includes a second expansion sleeve 354 , and the transmission shaft 22 is connected to the connecting sleeve 351 via the second expansion sleeve 354 .

[0071] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions and substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A welding wire I-wheel unwinding mechanism, the welding wire I-wheel comprising two first side discs and a second side disc arranged at intervals, and a center cylinder connected to the first side disc and the second side disc at both ends, the welding wire being wound on the center cylinder, characterized in that: The wire releasing mechanism comprises: A top cone assembly, the top cone assembly is used to be connected to the first side plate and can drive the welding wire I-shaped wheel to rotate; A transmission assembly, the transmission assembly comprising a flange cylinder, a transmission shaft partially received in the flange cylinder and extending out of the flange cylinder at both ends, and a bearing group mounted on the transmission shaft and located in the flange cylinder, the flange cylinder being connected to a frame on which the wire-releasing mechanism is mounted, and a first extending end of the transmission shaft being connected to the top cone assembly; A driving assembly, the driving assembly comprising a motor, a first pulley mounted on an output shaft of the motor, a second pulley mounted on a second protruding end of the transmission shaft and fixedly connected to the transmission shaft, and a belt, wherein the second pulley is connected to the first pulley through the belt and the diameter of the second pulley is larger than that of the first pulley; The motor drives the first pulley, and drives the second pulley and the transmission shaft fixedly connected to the second pulley to rotate through the first pulley. The transmission shaft drives the welding wire I-shaped pulley to rotate through the top cone assembly to realize automatic wire feeding.

2. The welding wire I-wheel unwinding mechanism according to claim 1, characterized in that: The first side disc comprises a first side disc body, a first conical hole located in the middle of the first side disc body, and at least two insertion holes surrounding the first conical hole. The top cone assembly comprises a fixed cone plate mounted on the transmission shaft, positioning holes opened at both ends of the fixed cone plate, a first top cone arranged in the middle of the fixed cone plate and fixedly connected to the fixed cone plate, and two second top cones respectively mounted in the two positioning holes and fixedly connected to the fixed cone plate. The first top cone is fixedly connected to the transmission shaft. The first top cone is used to be correspondingly inserted into the first conical hole and abut against the hole wall of the first conical hole. The two second top cones are used to be correspondingly inserted into the insertion holes of the first side disc.

3. The welding wire I-wheel unwinding mechanism according to claim 2, characterized in that: The first top cone includes a cone body fixedly connected to the fixed cone plate, a groove formed by being inwardly recessed from the surface of the cone body toward the I-shaped wheel, and a mounting hole formed through the bottom of the groove, the first protruding end of the transmission shaft passes through the mounting hole and is inserted into the groove, and the top cone assembly also includes a first expansion sleeve installed in the groove and connecting the transmission shaft to the cone body.

4. The welding wire I-wheel unwinding mechanism according to claim 2, characterized in that: The second top cone includes a mounting seat installed in the positioning hole, a through hole formed by penetrating the mounting seat, a cover plate covering the end of the mounting seat away from the welding wire I-shaped wheel and fixedly connected to the mounting seat, a cone head for inserting into the jack, and a spring member clamped between the cone head and the cover plate, the through hole includes a first through hole and a second through hole that are connected to each other, the first through hole is close to the I-shaped wheel and the aperture of the first through hole is smaller than the aperture of the second through hole, the cone head includes a cylindrical cone seat, a head connected to the cone seat and smaller in size than the cone seat, and a mounting groove formed by a surface of the cone seat away from the head, the cone seat is accommodated in the through hole and the head extends out of the through hole, and the two ends of the spring member are respectively abutted against the bottom of the mounting groove and the cover plate.

5. The welding wire I-wheel unwinding mechanism according to any one of claims 1 to 4, characterized in that: The bearing group includes a first bearing installed on one end of the transmission shaft close to the top cone assembly, a second bearing installed on the end of the transmission shaft away from the top cone assembly, and a third bearing located between the first bearing and the second bearing, wherein the first bearing and the second bearing are used to bear the radial force of the transmission shaft, and the third bearing is used to bear the axial force of the transmission shaft.

6. The welding wire I-wheel unwinding mechanism according to claim 5, characterized in that: The first bearing and the second bearing are cylindrical roller bearings, and the third bearing is a four-point contact ball bearing.

7. The welding wire I-wheel unwinding mechanism according to claim 5, characterized in that: The transmission assembly also includes two limit plates for limiting the bearing group, one end of the first bearing abuts against the flange cylinder and the other end abuts against the third bearing, and a limit plate is respectively provided at one end of the second bearing away from the first bearing and one end of the third bearing away from the first bearing.

8. The welding wire I-wheel unwinding mechanism according to claim 1, characterized in that: The transmission assembly also includes two end covers, which are respectively arranged at two ends of the flange cylinder.

9. The welding wire I-wheel unwinding mechanism according to claim 1, characterized in that: The driving assembly further comprises a brake unit which is sleeved on the transmission shaft and connected to the transmission shaft, and the brake unit is arranged between the second pulley and the flange cylinder.

10. The welding wire spool unwinding mechanism according to claim 9, characterized in that: The brake unit includes a connecting sleeve mounted on the transmission shaft and fixedly connected to the transmission shaft, a brake disc installed on the connecting sleeve, and at least one brake arranged along the peripheral direction of the brake disc, and the brake is connected to a frame on which the wire release mechanism is installed.

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