Tail jacking mechanism of wire pay-off device of welding wire spool

Abstract

The utility model provides a tail jacking mechanism of a wire pay-off device of a welding wire spool. The tail jacking mechanism comprises a tip cone piece used for being connected with the spool, a transmission assembly fixedly connected with the tip cone piece, and a driving assembly fixedly connected with the transmission assembly and capable of driving the transmission assembly to move back and forth in the direction where the central axis of the spool is located, the transmission assembly comprises a barrel with a shaft hole, a transmission shaft partially contained in the barrel, penetrating through the shaft hole and fixedly connected with the tip cone piece, and a bearing set installed on the transmission shaft and fixedly connected with the barrel. The first bearing is installed at the end, close to the tip cone piece, of the transmission shaft, the second bearing is installed at the end, away from the tip cone piece, of the transmission shaft, the third bearing is located between the first bearing and the second bearing, the first bearing and the second bearing are used for bearing radial force, and the third bearing is used for bearing axial force. The tail jacking mechanism provided by the utility model is used for compressing and fixing the large-diameter spool, and has the advantage of convenience in compressing and fixing.

Description

Technical Field

[0001] The utility model belongs to the field of welding wire production, and in particular relates to a tail top mechanism of a welding wire spool wire unwinding device. 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 tail top mechanism used to fix the I-shaped wheel in the unwinding device needs a new design. Utility Model Content

[0005] The utility model aims to provide a tail lifting mechanism for fixing a large-diameter I-shaped wheel, which has the advantages of convenient adjustment and convenient use.

[0006] To achieve the above-mentioned purpose, the utility model provides a tail top mechanism of a welding wire spool wire unwinding device, the welding wire spool wire unwinding device comprises a first frame and a second frame arranged at intervals, and a wire unwinding mechanism installed on the first frame, the tail top mechanism is installed on the second frame, the welding wire spool is located between the first frame and the second frame, and the two ends are respectively connected to the wire unwinding mechanism and the tail top mechanism, the tail top mechanism comprises:

[0007] A top cone, the top cone being used to connect with the spool;

[0008] A transmission assembly, the transmission assembly comprising a cylinder with an axial hole at the front end and a hollow interior, a transmission shaft partially received in the cylinder and with a first end passing through the axial hole and fixedly connected to the top cone, and a bearing group mounted on the transmission shaft and fixedly connected to the inner wall of the cylinder, the bearing group comprising a first bearing respectively mounted on an end of the transmission shaft adjacent to the top cone, a second bearing mounted on an end of the transmission shaft away from the top cone, 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;

[0009] The driving assembly includes a first driving unit fixedly connected to the cylinder and capable of driving the cylinder to move back and forth along a first direction, wherein the first direction is the same as the direction of the central axis of the transmission shaft.

[0010] In a specific embodiment, the first shaft and the second bearing are cylindrical roller bearings, and the third bearing is a four-point contact ball bearing.

[0011] In a specific embodiment, the transmission assembly also includes two limiting rings for limiting the bearing group, the first bearing is clamped between the front end of the cylinder and the third bearing, and a limiting ring sleeved on the transmission shaft 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.

[0012] In a specific embodiment, the first driving unit includes a tail plate connected to one end of the cylinder away from the top cone, and two first cylinders arranged at intervals, the piston rods of the two first cylinders are respectively connected to the two ends of the tail plate, and the extension and retraction of the piston rods of the first cylinders can drive the transmission shaft to move back and forth along the first direction through the tail plate and the cylinder connected to the tail plate.

[0013] In a specific embodiment, the two cylinders are fixedly mounted on the second frame and located on the side of the tail plate facing the I-shaped wheel, the tail plate includes two notches formed by being recessed inward from both ends of the tail plate, the driving assembly also includes two connecting members for connecting the piston rod of the first cylinder and the tail plate, the connecting members include a first connecting rod and a second connecting rod connected to each other, a circular ring portion extending outward from the first connecting rod, and a threaded hole opened in the second connecting rod, the first connecting rod is clamped in the notch and the two sides of the tail plate are respectively abutted against the circular ring portion and the second connecting rod, and the piston rod of the first cylinder is inserted into the threaded hole to form a threaded connection.

[0014] In a specific embodiment, the tail top mechanism also includes a locking assembly fixed to the second frame, and the locking assembly includes a limit rod and a second driving unit that drives the limit rod to move up and down. Before the I-shaped wheel releases the wire and after the driving assembly drives the top cone to connect with the I-shaped wheel, the second driving unit drives the limit rod to move downward to limit the tail plate. After the I-shaped wheel completes wire release, the second driving unit drives the limit rod to move upward to allow the tail plate to move backward.

[0015] In a specific embodiment, the locking assembly also includes a fixing plate fixedly connected to the second frame, a mounting plate and a mounting block spaced apart from the fixing plate, a first clearance hole formed by penetrating the mounting plate along the length direction of the limiting rod, and a second clearance hole formed by penetrating the mounting block along the length direction of the limiting rod, the mounting plate is located above the mounting block, the second driving unit includes a second cylinder mounted on the mounting plate, the piston rod of the second cylinder extends out of the first clearance hole and is connected to the limiting rod, and the limiting rod is partially accommodated in the second clearance hole and can move in the second clearance hole.

[0016] In a specific embodiment, the second driving unit further includes a floating joint, one end of which is connected to the piston rod of the second cylinder and the other end of which is connected to the limiting rod.

[0017] In a specific embodiment, the tail top mechanism further includes a flange sleeve sleeved on the outer side of the cylinder, and the flange sleeve is fixedly connected to the second frame.

[0018] In a specific embodiment, the top cone member includes a cone, a groove formed by being recessed inward from the surface of the cone toward the I-shaped wheel, and a mounting hole formed through the bottom of the groove, the transmission shaft passes through the shaft hole and the mounting hole and is inserted into the groove, and the tail top mechanism also includes a tightening sleeve installed in the groove to connect the transmission shaft to the cone.

[0019] The beneficial effects of the utility model include at least:

[0020] 1. The tail top mechanism provided by the utility model comprises a top cone member for connecting with the I-shaped wheel, a transmission assembly fixedly connected to the top cone member, and a drive assembly fixedly connected to the transmission assembly, wherein the drive assembly can drive the top cone member to move back and forth along the direction of the central axis of the I-shaped wheel through the transmission assembly; thus, the distance between the top cone member and the I-shaped wheel can be changed by driving the transmission assembly to move through the drive assembly, and even if the top cone member is connected to the I-shaped wheel or the top cone member is released from the I-shaped wheel, it is convenient to clamp the I-shaped wheel without manual operation, and different large-diameter I-shaped wheels can be matched.

[0021] 2. The transmission assembly in the tail top mechanism provided by the utility model includes a transmission shaft and a bearing group installed on the transmission shaft, the bearing group includes a first bearing installed on the end of the transmission shaft adjacent to the top cone, a second bearing installed on the end of the transmission shaft away from the top cone, 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.

[0022] 3. The tail lift mechanism provided by the utility model also includes a locking assembly for limiting the tail plate, which can prevent the I-shaped wheel from flying out during high-speed rotation.

[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 spool unwinding device including a tail top mechanism provided in one embodiment of the utility model;

[0025] Figure 2 for Figure 1 The structural schematic diagram of the welding wire spool wire unwinding device at one angle is shown;

[0026] Figure 3 for Figure 2 A cross-sectional view of line AA shown;

[0027] Figure 4 for Figure 3 A magnified view of part B;

[0028] Figure 5 A three-dimensional structural diagram of a tail lift mechanism provided in one embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the structure of a top cone member in a tail top mechanism provided by an embodiment of the utility model;

[0030] Figure 7 It is a schematic diagram of the positions of the locking assembly and the driving assembly in the tail lift 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 tail top mechanism 100 of a welding wire spool unwinding device. The tail top mechanism is a component of the welding wire spool unwinding device and is used to connect with the spool to support the spool.

[0033] The welding wire I-wheel wire-releasing device 200 includes a first frame 201 and a second frame 202 that are spaced apart, and a wire-releasing mechanism 203 installed on the first frame 201, the tail top mechanism 100 is installed on the second frame 202, and the welding wire I-wheel 300 is located between the first frame 201 and the second frame 202, and its two ends are respectively connected to the wire-releasing mechanism 203 and the tail top mechanism 100.

[0034] The welding wire I-wheel unwinding device 200 using the tail top mechanism supports the I-wheel 300 through the tail top mechanism 100 and the wire unwinding mechanism 203, and drives the I-wheel 300 to rotate through the wire unwinding mechanism 203 to realize the I-wheel wire unwinding; and the I-wheel is clamped or loosened by changing the distance between the tail top mechanism 100 and the I-wheel 300.

[0035] In the present invention, the diameter of the I-shaped wheel 300 is 1140 mm, and the weight of the I-shaped wheel wound with welding wire is 2.5 tons.

[0036] The I-shaped wheel 300 includes two first side discs 301 and a second side disc 302 spaced apart, and a center tube 303 connected to the first side disc 301 and the second side disc 302 at both ends, welding wire is wound on the center tube 303, the wire unwinding mechanism 203 is connected to the first side disc 301, and the tail top mechanism 100 is connected to the second side disc 302.

[0037] The second side plate 302 includes a second side plate body 3021 and a conical hole 3022 located in the middle of the second side plate body 3021. The central axis of the second side plate body 3021 and the central axis of the second conical hole 3022 are located on the same straight line.

[0038] The tail top mechanism 100 includes a top cone part 10 for connecting to the I-shaped wheel 300, a transmission assembly 20 fixedly connected to the top cone part 10, and a drive assembly 30 fixedly connected to the transmission assembly 20. The drive assembly 30 can drive the top cone part 10 to move back and forth along the direction of the central axis of the I-shaped wheel 300 through the transmission assembly 20 to change the distance between the top cone part 10 and the I-shaped wheel 300.

[0039] Please refer to Figure 6The top cone 10 includes a cone 11, a groove 12 formed by being recessed inward from the cone 11 toward the surface of the I-shaped wheel 300, and a mounting hole 13 formed through the bottom of the groove 12.

[0040] In this embodiment, the shape of the cone matches the shape of the conical hole 3022 . When the tail top mechanism supports the I-shaped wheel 300 , the cone 11 is inserted into the conical hole 3022 and the cone 11 abuts against the hole wall of the conical hole 3022 .

[0041] In this embodiment, the cone 11 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, and in the direction from the tail top mechanism to the wire releasing mechanism, the cone 11 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.

[0042] The groove 12 is formed by being recessed inward from a surface of the third cone away from the first cone.

[0043] When the tail top mechanism supports and clamps the I-shaped wheel, the second cone and the third cone are inserted into the first cone hole 3022.

[0044] Please refer to Figure 4 and Figure 5 The transmission assembly 20 includes a cylinder 21 with an axial hole at the front end and a hollow interior, a transmission shaft 22 partially accommodated in the cylinder 21 and with the first end passing through the axial hole and fixedly connected to the top cone 10, a bearing group 23 mounted on the transmission shaft 22 and fixedly connected to the inner wall of the cylinder 21, and two limiting rings 24 for limiting the bearing group 23.

[0045] Preferably, the tail top mechanism 100 further includes a clamping sleeve 40 installed in the groove 12 , the transmission shaft 22 extends into the groove 12 through the installation hole 13 , and the transmission shaft 22 is fixedly connected to the top cone 10 through the clamping sleeve 40 .

[0046] In this embodiment, the front end of the cylinder 21 refers to the end of the cylinder facing the spool 300 .

[0047] In this embodiment, the cylinder 21 includes a circular bottom shell, a cylindrical main body extending from the periphery of the bottom shell, and the axial hole opened in the bottom shell. The bottom shell can be understood as the front end of the cylinder 21.

[0048] In this embodiment, the end of the transmission shaft 22 facing the I-shaped wheel is the first end of the transmission shaft, and the end away from the I-shaped wheel is the second end of the transmission shaft. The first end of the transmission shaft 22 passes through the shaft hole and extends out of the cylinder and is connected to the top cone 10 through the expansion sleeve 40. The second end of the transmission shaft 22 is located in the cylinder 21 and is spaced apart from the end of the main body away from the I-shaped wheel 300.

[0049] Preferably, the bearing group 23 includes a first bearing 231 installed on the end of the transmission shaft 22 adjacent to the top cone part 10, a second bearing 232 installed on the end of the transmission shaft 22 away from the top cone part 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 22, and the third bearing 233 is used to bear the axial force of the transmission shaft 22.

[0050] In this embodiment, the first bearing is clamped between the front end (bottom shell) of the cylinder and the third bearing, that is, one end of the first bearing abuts against the front end of the cylinder and the other end abuts against the third bearing; one end of the second bearing away from the first bearing and one end of the third bearing away from the first bearing are respectively provided with a limiting ring 24 sleeved on the transmission shaft.

[0051] 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.

[0052] 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.

[0053] In this practical type, the I-shaped wheel will drive the transmission shaft to rotate when releasing the wire. 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.

[0054] The driving assembly 30 includes a first driving unit 31 fixedly connected to the cylinder 21 and capable of driving the cylinder 21 to move back and forth along a first direction, and two connecting members 32 . The first direction is the same as the direction of the central axis of the transmission shaft 22 .

[0055] Preferably, the first driving unit 31 includes a tail plate 311 connected to one end of the cylinder 21 away from the top cone 10, and two first cylinders 312 arranged at intervals, the piston rods of the two first cylinders 312 are respectively connected to the two ends of the tail plate 311, and the extension and retraction of the piston rod of the first cylinder 312 can drive the transmission shaft 22 to move back and forth along the first direction through the tail plate 311 and the cylinder 21 connected to the tail plate 311.

[0056] The tailgate 311 includes a tailgate body 3111 and two notches 3112 that are recessed inward from both ends of the tailgate body 3111 . The cylinder 21 is connected to the middle portion of the tailgate body 3111 .

[0057] In this embodiment, the tail plate body 3111 is a plate body whose width in the middle is greater than that at both ends.

[0058] In this embodiment, the two first cylinders 312 are fixed to the second frame 202 and are located on a side of the tail plate 311 facing the spool 300 .

[0059] In this embodiment, the first cylinder 312 is connected to the tail plate 311 through the connecting member 32 .

[0060] The connecting member 32 includes a first connecting rod 321 and a second connecting rod 322 connected to each other, a circular ring portion 323 extending outward from the first connecting rod 321, and a threaded hole opened in the second connecting rod 322. The first connecting rod 321 is clamped in the notch 3112 and the two sides of the tail plate 311 are respectively abutted against the circular ring portion 323 and the second connecting rod 322. The piston rod of the first cylinder 312 is inserted into the threaded hole to form a threaded connection.

[0061] In this embodiment, both the first connecting rod 321 and the second connecting rod 322 are cylindrical rods, and the diameter of the second connecting rod is greater than the diameter of the first connecting rod 321 .

[0062] Preferably, the tail top mechanism 100 further includes a flange sleeve 50 sleeved on the outer side of the cylinder 21 , and the flange sleeve 50 is fixedly connected to the second frame 202 .

[0063] The flange sleeve 50 is used to limit the back-and-forth movement of the cylinder 21 .

[0064] Preferably, the tail top mechanism 100 further comprises an end cover 60 installed at one end of the cylinder 21 close to the top cone 10, and the end cover plays a protective role on the cylinder.

[0065] Please refer to Figure 7Preferably, the tail top mechanism 100 further includes a locking assembly 70 fixed to the second frame 202 , and the locking assembly 70 is used to limit the tail plate 311 .

[0066] Preferably, the locking assembly 70 includes a limit rod 71 and a second driving unit 72 for driving the limit rod 71 to move up and down. Before the I-shaped wheel 300 releases the wire and after the driving assembly 30 drives the top cone 10 to connect with the I-shaped wheel 300, the second driving unit 72 drives the limit rod 71 to move downward to limit the tail plate 311. After the I-shaped wheel 300 completes wire release, the second driving unit 72 drives the limit rod 71 to move upward to allow the tail plate 311 to move backward.

[0067] The limiting rod 71 is a cylindrical rod, and its extending direction is the same as the height direction of the second frame 202 .

[0068] The second driving unit 72 includes a second cylinder 721 and a floating joint 722 . One end of the floating joint 722 is connected to the piston rod of the second cylinder 721 , and the other end of the floating joint 722 is connected to the limiting rod 71 .

[0069] Preferably, the locking assembly 70 also includes a fixing plate 73 fixedly connected to the second frame 202, a mounting plate 74 and a mounting block 75 spaced apart from the fixing plate 73, a first clearance hole formed by penetrating the mounting plate 74 along the height direction of the limiting rod 71, and a second clearance hole formed by penetrating the mounting block 75 along the height direction of the limiting rod 71, and the mounting plate 74 is located above the mounting block 75.

[0070] The limiting rod 71 is partially received in the second paving hole and can move in the second paving hole. The second cylinder 721 is installed on the mounting plate 74 , and the piston rod of the second cylinder 721 extends out of the first paving hole and is connected to the limiting rod 71 .

[0071] In the present invention, the tail top mechanism 100 is used to fix the I-shaped wheel 300. First, the I-shaped wheel 300 is connected to the wire releasing mechanism 203. Then, the piston rod of the first cylinder 312 is extended, and the tail plate 311 and the cylinder 21 connected to the tail plate 311 are driven to drive the transmission shaft 22 to move toward the I-shaped wheel 300, so that the top cone 10 is connected to the I-shaped wheel 300; then, the piston rod of the second cylinder 721 is extended to drive the limiting rod 71 to move downward and limit the tail plate 311 to prevent the I-shaped wheel from flying out during the rotation process; when the wire releasing of the I-shaped wheel 300 is completed, the piston rod of the second cylinder 721 is retracted to drive the limiting rod 71 to move upward so that the tail plate 311 can retreat, and then the piston rod of the first cylinder 312 is retracted to drive the transmission shaft 22 to move away from the I-shaped wheel 300, so that the top cone 10 and the I-shaped wheel 300 are spaced apart, so that the I-shaped wheel can be removed.

[0072] 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 tail top mechanism of a welding wire spool unwinding device, the welding wire spool unwinding device comprising a first frame and a second frame arranged at intervals, and a wire unwinding mechanism installed on the first frame, the tail top mechanism is installed on the second frame, the welding wire spool is located between the first frame and the second frame, and the two ends are respectively connected to the wire unwinding mechanism and the tail top mechanism, characterized in that: The tail top mechanism comprises: A top cone, the top cone being used to connect with the spool; A transmission assembly, the transmission assembly comprising a cylinder with an axial hole at the front end and a hollow interior, a transmission shaft partially received in the cylinder and with a first end passing through the axial hole and fixedly connected to the top cone, and a bearing group mounted on the transmission shaft and fixedly connected to the inner wall of the cylinder, the bearing group comprising a first bearing respectively mounted on an end of the transmission shaft adjacent to the top cone, a second bearing mounted on an end of the transmission shaft away from the top cone, 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; The driving assembly includes a first driving unit fixedly connected to the cylinder and capable of driving the cylinder to move back and forth along a first direction, wherein the first direction is the same as the direction of the central axis of the transmission shaft.

2. The tail top mechanism of the welding wire spool unwinding device according to claim 1, characterized in that: The first shaft and the second bearing are cylindrical roller bearings, and the third bearing is a four-point contact ball bearing.

3. The tail top mechanism of the welding wire spool unwinding device according to claim 1, characterized in that: The transmission assembly also includes two limiting rings for limiting the bearing group. The first bearing is clamped between the front end of the cylinder and the third bearing. A limiting ring sleeved on the transmission shaft 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.

4. The tail top mechanism of the welding wire spool unwinding device according to any one of claims 1 to 3, characterized in that: The first driving unit includes a tail plate connected to one end of the cylinder away from the top cone, and two first cylinders arranged at intervals, the piston rods of the two first cylinders are respectively connected to the two ends of the tail plate, and the extension and retraction of the piston rods of the first cylinders can drive the transmission shaft to move back and forth along the first direction through the tail plate and the cylinder connected to the tail plate.

5. The tail top mechanism of the welding wire spool unwinding device according to claim 4, characterized in that: The two cylinders are fixedly mounted on the second frame and located on a side of the tail plate facing the I-shaped wheel, the tail plate includes two notches formed by being recessed inwardly from both ends of the tail plate, the driving assembly also includes two connecting members for connecting the piston rod of the first cylinder and the tail plate, the connecting members include a first connecting rod and a second connecting rod connected to each other, a circular ring portion extending outwardly from the first connecting rod, and a threaded hole opened in the second connecting rod, the first connecting rod is clamped in the notch and the two sides of the tail plate are respectively abutted against the circular ring portion and the second connecting rod, and the piston rod of the first cylinder is inserted into the threaded hole to form a threaded connection.

6. The tail top mechanism of the welding wire spool unwinding device according to claim 4, characterized in that: The tail top mechanism also includes a locking assembly fixed to the second frame, and the locking assembly includes a limit rod and a second driving unit that drives the limit rod to move up and down. Before the I-shaped wheel releases the wire and after the driving assembly drives the top cone to connect with the I-shaped wheel, the second driving unit drives the limit rod to move downward to limit the tail plate. After the I-shaped wheel completes wire release, the second driving unit drives the limit rod to move upward to enable the tail plate to retreat.

7. The tail top mechanism of the welding wire spool unwinding device according to claim 6, characterized in that: The locking assembly also includes a fixing plate fixedly connected to the second frame, a mounting plate and a mounting block spaced apart from the fixing plate, a first clearance hole formed by penetrating the mounting plate along the length direction of the limiting rod, and a second clearance hole formed by penetrating the mounting block along the length direction of the limiting rod, the mounting plate is located above the mounting block, the second driving unit includes a second cylinder mounted on the mounting plate, a piston rod of the second cylinder extends out of the first clearance hole and is connected to the limiting rod, and the limiting rod is partially accommodated in the second clearance hole and can move in the second clearance hole.

8. The tail top mechanism of the welding wire spool unwinding device according to claim 7, characterized in that: The second driving unit further comprises a floating joint, one end of which is connected to the piston rod of the second cylinder and the other end of which is connected to the limiting rod.

9. The tail top mechanism of the welding wire spool unwinding device according to claim 1, characterized in that: The tail top mechanism also includes a flange sleeve sleeved on the outside of the cylinder, and the flange sleeve is fixedly connected to the second frame.

10. The tail top mechanism of the welding wire spool unwinding device according to claim 1, characterized in that: The top cone member includes a cone, a groove formed by inward depression from the surface of the cone toward the I-shaped wheel, and a mounting hole formed through the bottom of the groove. The transmission shaft passes through the shaft hole and the mounting hole and is inserted into the groove. The tail top mechanism also includes a tightening sleeve installed in the groove to connect the transmission shaft to the cone.

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