Electric welding machine concentrator

Abstract

The invention belongs to the technical field of concentrators, and particularly discloses an electric welding machine concentrator. The electric welding machine concentrator comprises an insulated wire box, a branch wire clamp, a bus bar and a bus clamp, wherein the insulated wire box is provided with a plurality of first mounting cavities and a plurality of second mounting cavities; the multiple branch wire clamps are arranged, each branch wire clamp is arranged in the corresponding first mounting cavity, and each branch wire clamp is provided with a first connecting part. The bus bar is arranged in the second mounting cavity, and each branch wire clamp is electrically connected with the bus bar through a branch cable; the bus clamp is electrically connected with the bus bar through the bus cable, the bus clamp is provided with a second connecting part, and the second connecting part is located outside the insulated wire box. A plurality of electric welding machines can be conveniently and simultaneously connected with a welding part or grounded, and the working efficiency and the connection reliability are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hubs, and in particular relates to a hub for electric welding machines. Background Art

[0002] In large-scale engineering construction, some large components such as pressure steel pipes, volutes, tailwater pipes, etc. require a lot of welding. In order to meet the welding process requirements, a work area needs multiple electric welders to work at the same time, and the negative poles of each electric welder need to be connected to the same weldment at the same time. However, it is usually difficult to find a convenient position on the weldment for the electric welder's negative line to be directly connected. It is necessary to weld an iron block on the weldment in advance as a negative connection point. When multiple electric welders work together, multiple electric welder negative line connection points need to be set up, and the negative connection points need to be removed after the work is completed.

[0003] In addition, the welding machine will generate a large number of arcs and sparks during operation, or encounter some unexpected situations such as short circuits. If the casing is not grounded, leakage may occur, causing electric shock accidents. By grounding the welding machine casing, the leakage current can be effectively introduced into the ground, reducing the risk of electric shock or equipment damage. However, in the actual use of the welding machine, because there are no preset grounding points or grounding piles around or the welding machine is far away from the grounding point, the casing of the welding machine is often not grounded or falsely grounded. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a welding machine concentrator, which can facilitate the connection or grounding of multiple welding machines to welding parts at the same time, improve work efficiency and connection reliability.

[0005] The welding machine hub of the embodiment of the present invention includes: an insulating wire box, the insulating wire box has a plurality of first installation cavities and a second installation cavity; a branch line clamp, a plurality of branch line clamps are provided, each of the branch line clamps is arranged in one of the first installation cavities, and the branch line clamp has a first connection portion; a bus bar, the bus bar is arranged in the second installation cavity, each of the branch line clamps is electrically connected to the bus bar through a branch cable; a bus clamp, the bus clamp is electrically connected to the bus bar through a main cable, the bus clamp has a second connection portion, and the second connection portion is located outside the insulating wire box.

[0006] The electric welding machine hub in this embodiment is provided with a plurality of first installation cavities and a plurality of branch line clamps, each branch line clamp is provided in a first installation cavity, each branch line clamp has a first connection portion, each branch line clamp can be connected to a negative line or a ground line of an electric welding machine through the first connection portion, and the plurality of branch line clamps are connected to the same busbar through branch cables, and the busbar is connected to the bus clamp through a main cable, so that when a plurality of electric welding machines are working at the same time, the plurality of electric welding machines can be connected to the weldment or grounding point at the same time through the bus clamp, so as to facilitate the connection of the plurality of electric welding machines with the weldment or grounding point, improve the work efficiency, and at the same time help to ensure the reliability of the connection with the weldment or grounding point, and improve the safety of the equipment operation and the operator. The second connection portion is located outside the insulating wire box, so as to facilitate the connection of the second connection portion with the weldment or grounding point.

[0007] In this embodiment, the insulating wire box is provided with a first wire-passing hole, and each of the first installation cavities is connected to the outside through one of the first wire-passing holes.

[0008] In this embodiment, the plurality of first installation cavities are separated by a first insulating partition; and / or the plurality of first installation cavities are separated from the second installation cavity by a second insulating partition.

[0009] In this embodiment, a second wire-passing hole is provided on the second insulating partition, each of the first installation cavities is connected to the second installation cavity through the second wire-passing hole, and each branch cable between the branch line clamp and the busbar passes through the corresponding second wire-passing hole.

[0010] In this embodiment, the branch wire clamp includes: a first wire clamp body, the first wire clamp body is connected to the insulating wire box, and the first wire clamp body has a first clamping portion; a first clamping piece, the first clamping piece is connected to the first wire clamp body, and the first connecting portion is formed between the first clamping piece and the first clamping portion.

[0011] In this embodiment, the first clamping member includes: a first screw, which is threadedly connected to the first wire clamp body; and a first clamping block, which is connected to the first screw and is used to drive the first clamping block to move closer to or away from the first clamping portion.

[0012] In this embodiment, the branch line clamp further includes a first operating handle, and the first operating handle is disposed on the first screw rod so that the first screw rod can be rotated by the first operating handle.

[0013] In this embodiment, a plurality of the first installation cavities are distributed in sequence along a first direction; a plurality of the first installation cavities and the second installation cavities are distributed along a second direction, and the first direction and the second direction are arranged orthogonally.

[0014] In this embodiment, the insulating wire box includes an insulating box body and an insulating cover body, the insulating cover body is detachably connected to the insulating box body, and the insulating box body and the insulating cover body enclose a plurality of the first installation cavities and the second installation cavities.

[0015] In this embodiment, the insulating cover body includes a plurality of sub-cover bodies, each of the sub-cover bodies is hinged to the insulating box body, and each of the first installation cavities corresponds to one sub-cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an electric welding machine hub according to an embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of an insulating wire box according to an embodiment of the present invention.

[0018] Figure 3 It is a schematic structural diagram of the welding machine hub after removing the insulating wire box according to the embodiment of the present invention.

[0019] Reference numerals:

[0020] 1. Insulating wire box; 11. First installation cavity; 12. Second installation cavity; 13. First wire hole; 14. First insulating partition; 15. Second insulating partition; 151. Second wire hole; 16. Insulating box body; 17. Insulating cover body; 2. Branch line clamp; 21. First connecting part; 22. First wire clamp body; 23. First clamping piece; 231. First screw; 232. First clamping block; 24. First operating handle; 3. Busbar; 4. Bus clamp; 41. Second wire clamp body; 42. Second clamping piece; 5. Branch cable; 6. Main cable. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0022] In this embodiment, if Figures 1 to 3As shown, the welding machine hub includes an insulating wire box 1, a branch line clamp 2, a busbar 3 and a bus clamp 4. The insulating wire box 1 has a plurality of first installation cavities 11 and a second installation cavity 12. A plurality of branch line clamps 2 are provided, each of which is provided in a first installation cavity 11, and the branch line clamp 2 has a first connection portion 21. The busbar 3 is provided in the second installation cavity 12, and each branch line clamp 2 is electrically connected to the busbar 3 through a branch cable 5; the bus clamp 4 is electrically connected to the busbar 3 through a main cable 6, and the bus clamp 4 has a second connection portion, and the second connection portion is located outside the insulating wire box 1.

[0023] Specifically, the first connection portion 21 is used to be connected to the negative electrode line of the electric welder or the shell grounding line of the electric welder. When the first connection portion 21 is connected to the negative electrode line of the electric welder, the second connection portion is used to be connected to the weldment. When the first connection portion 21 is connected to the shell grounding line of the electric welder, the second connection portion is used to be electrically connected to the grounding point.

[0024] The electric welding machine hub in this embodiment is provided with a plurality of first installation cavities 11 and a plurality of branch line clamps 2, each branch line clamp 2 is provided in a first installation cavity 11, each branch line clamp 2 has a first connection portion 21, each branch line clamp 2 can be connected to a negative line or ground line of an electric welding machine through the first connection portion 21, and a plurality of branch line clamps 2 are connected to the same busbar 3 through a branch cable 5, and the busbar 3 is connected to the bus clamp 4 through a main cable 6, so that when a plurality of electric welding machines are working at the same time, the bus clamp 4 can be used to connect a plurality of electric welding machines to a weldment or a grounding point at the same time, so as to facilitate the connection of a plurality of electric welding machines to a weldment or a grounding point, improve the work efficiency, and at the same time help to ensure the reliability of the connection with the weldment or the grounding point, and improve the safety of the equipment operation and the operator. The second connection portion is located outside the insulating wire box 1, so as to facilitate the connection of the second connection portion to the weldment or the grounding point.

[0025] In this embodiment, if Figure 1 and Figure 2 As shown, the insulating wire box 1 is provided with first wire-passing holes 13 , and each first installation cavity 11 is connected to the outside through a first wire-passing hole 13 .

[0026] For example, the first wire passing hole 13 may be a circular hole, a square hole, etc. The shape of the first wire passing hole 13 may be set as required as long as it is convenient for the cable to pass through, and is not limited here.

[0027] Specifically, each first installation cavity 11 is connected to the outside through a first wire passing hole 13, which means that the number of first wire passing holes 13 is the same as the number of first installation cavities 11, and the positions of multiple first installation cavities 11 and multiple first wire passing holes 13 correspond one to one, so that the negative wires or grounding wires of multiple external electric welding machines pass through the first wire passing holes 13 one by one and are electrically connected to the branch line clamps 2 in the corresponding first installation cavities 11.

[0028] It can be understood that by setting the first wire passing hole 13, the negative wire or the ground wire of the electric welding machine can be directly connected to the branch wire clamp 2 in the first installation cavity 11 through the first wire passing hole 13, which facilitates the connection between the negative wire or the ground wire and the branch wire clamp 2 and helps to improve the overall neatness.

[0029] In this embodiment, if Figure 2 As shown, the plurality of first mounting cavities 11 are separated by first insulating partitions 14 .

[0030] Specifically, the first insulating partition 14 can be processed separately and then installed, or can be integrally formed, which is not limited here.

[0031] It should be noted that since the branch line clamp 2 is arranged in the first installation cavity 11, and multiple first installation cavities 11 are separated by the first insulating partition 14, adjacent branch line clamps 2 are separated by the first insulating partition 14, so that adjacent branch line clamps 2 are prevented from direct contact, thereby avoiding short circuits or other electrical failures, and the provision of the first insulating partition 14 is beneficial to improving the overall strength of the insulating wire box 1.

[0032] In this embodiment, if Figure 2 As shown, the plurality of first installation cavities 11 are separated from the second installation cavities 12 by the second insulating partition 15 .

[0033] It should be noted that since the branch line clamp 2 is arranged in the first installation cavity 11 and the busbar 3 is arranged in the second installation cavity 12, and multiple first installation cavities 11 are separated from the second installation cavity 12 by the second insulating partition 15, the branch line clamp 2 is separated from the busbar 3 by the second insulating partition 15, thereby avoiding direct contact between the branch line clamp 2 and the busbar 3, thereby avoiding short circuit or other electrical faults, and the provision of the second insulating partition 15 is beneficial to improving the overall strength of the insulating wire box 1.

[0034] In this embodiment, if Figure 1 and Figure 2 As shown, a second wire-passing hole 151 is provided on the second insulating partition 15 , each first installation cavity 11 is connected with the second installation cavity 12 through the second wire-passing hole 151 , and each branch cable 5 between the branch line clamp 2 and the busbar 3 passes through the corresponding second wire-passing hole 151 .

[0035] For example, the second wire passing hole 151 may be a circular hole, a square hole, etc. The shape of the second wire passing hole 151 may be set as required as long as it is convenient for the branch cable 5 to pass through, and is not limited here.

[0036] It can be understood that by setting a second wire passing hole 151 on the second insulating partition 15, it is convenient to directly connect the branch line clamp 2 in the first installation cavity 11 to the bus bar 3 in the second installation cavity 12 through the branch cable 5 passing through the second wire passing hole 151, so that the branch cable 5 is distributed more neatly and it is beneficial to save the branch cable 5.

[0037] In this embodiment, if Figure 1 and Figure 3 As shown, the branch line clamp 2 includes a first line clamp body 22 and a first clamping member 23. The first line clamp body 22 is connected to the insulating wire box 1, and the first line clamp body 22 has a first clamping portion; the first clamping member 23 is connected to the first line clamp body 22, and a first connecting portion 21 is formed between the first clamping member 23 and the first clamping portion.

[0038] Specifically, the first clamp body 22 is connected through the branch cable 5 and the busbar 3. Both ends of the branch cable 5 are provided with connection terminals, and the connection terminals at both ends of the branch cable 5 are connected to the busbar 3 or the first clamp body 22 through bolts.

[0039] For example, the first wire clamp body 22 is U-shaped, one end of the first wire clamp body 22 forms a first clamping portion, the first clamping member 23 is connected to the other end of the first wire clamp body 22, and the first clamping member 23 and the first clamping portion are arranged opposite to each other to form a first connecting portion 21 connected to the negative wire or ground wire of the welding machine. The first wire clamp body 22 can be connected to the inner wall of the first installation cavity 11 by bolts.

[0040] It can be understood that the branch line clamp 2 includes a first clamp body 22 and a first clamping member 23. By connecting the first clamp body 22 to the insulating wire box 1, the branch line clamp 2 can be fixed in the insulating wire box 1 as a whole, thereby improving the reliability of the connection of the branch line clamp 2. The first clamp body 22 has a first clamping portion, and a first connecting portion 21 is formed between the first clamping portion and the first clamping member 23. The first connecting portion 21 can facilitate the connection of the branch line clamp 2 to the welding machine.

[0041] In this embodiment, if Figure 1 and Figure 3 As shown, the first clamping member 23 includes a first screw 231 and a first clamping block 232. The first screw 231 is threadedly connected to the first wire clamp body 22; the first clamping block 232 is connected to the first screw 231, and the first screw 231 is used to drive the first clamping block 232 to approach or move away from the first clamping portion.

[0042] Specifically, when the first wire clamp body 22 is arranged in a U-shape, a threaded hole is arranged at one end of the first wire clamp body 22, and the first screw rod 231 is threadedly connected in the threaded hole.

[0043] It can be understood that the first screw 231 is threadedly connected to the first wire clamp body 22, and the first clamp block 232 is connected to the first screw 231. When the first screw 231 is rotated, the first clamp block 232 can be driven to move, so that the first clamp block 232 can be close to or away from the first clamping part. When the electric welder needs to be connected, the first screw 231 is rotated to make the first clamp block 232 close to the first clamping part, and the negative line or grounding line of the electric welder is clamped by the cooperation of the first clamp block 232 and the first clamping part, so that the electric welder is connected to the branch wire clamp 2. When the connection between the electric welder and the branch wire clamp 2 needs to be disconnected, the first screw 231 is rotated to make the first clamp block 232 away from the first clamping part, so that the negative line or the grounding line can be loosened.

[0044] In this embodiment, if Figure 1 and Figure 3 As shown, the branch line clamp 2 further includes a first operating handle 24 , and the first operating handle 24 is disposed on the first screw rod 231 so as to rotate the first screw rod 231 through the first operating handle 24 .

[0045] Specifically, the first operating handle 24 is installed on the end of the first screw 231 away from the first clamping block 232, and the first operating handle 24 is fixed on the first screw 231. For example, a mounting hole is opened on the first operating handle 24, and the first operating handle 24 is connected to the first screw 231 through an interference fit through the mounting hole. Of course, technicians in this field can select the connection method between the first operating handle 24 and the first screw 231 as needed, and there is no limitation here.

[0046] In this embodiment, the bus clamp 4 and the branch line clamp 2 have the same structure, and the specific difference is that the bus clamp 4 and the branch line clamp 2 have different sizes. The sizes of the bus clamp 4 and the branch line clamp 2 can be designed according to the rated current of the electric welding machine to ensure the flow rate during welding. The sizes of the bus clamp 4 and the branch line clamp 2 are not restricted here.

[0047] In detail, in this embodiment, Figure 1 and Figure 3 As shown, the bus clamp 4 includes a second clamp body 41 and a second clamping member 42. The second clamp body 41 has a second clamping portion. The second clamping member 42 is connected to the second clamp body 41, and a second connection portion is formed between the second clamping member 42 and the second clamping portion. The second clamp body 41 is connected to the busbar 3 through the bus cable 6. Specifically, both ends of the bus cable 6 are provided with connection terminals, and the connection terminals at both ends of the bus cable 6 are connected to the second clamp body 41 or the busbar 3 through bolts.

[0048] For example, the second wire clamp body 41 is U-shaped, one end of the second wire clamp body 41 forms a second clamping portion, the second clamping member 42 is connected to the other end of the second wire clamp body 41, and the second clamping member 42 and the second clamping portion are arranged opposite to each other to form a second connection portion for connecting a welding piece or a grounding point. The second wire clamp body 41 can be connected to the inner wall of the first installation cavity 11 by bolts.

[0049] It can be understood that the bus clamp 4 includes a second wire clamp body 41 and a second clamping member 42. The second wire clamp body 41 has a second clamping portion. A second connecting portion is formed between the second clamping portion and the second clamping member 42. The second connecting portion can be used to easily connect the bus clamp 4 to a weldment or a grounding point.

[0050] In this embodiment, if Figure 1 and Figure 3 As shown, the second clamping member 42 includes a second screw and a second clamping block, the second screw is threadedly connected to the second clamp body 41; the second clamping block is connected to the second screw, and the second screw is used to drive the second clamping block to approach or move away from the second clamping portion.

[0051] Specifically, when the second wire clamp body 41 is arranged in a U-shape, a threaded hole is arranged at one end of the second wire clamp body 41 , and the second screw is threadedly connected in the threaded hole of the second wire clamp body 41 .

[0052] It can be understood that the second screw is threadedly connected to the second wire clamp body 41, and the second clamp block is connected to the second screw. When the second screw is rotated, the second clamp block can be driven to move so that the second clamp block can be close to or away from the second clamping portion. When it is necessary to connect the weldment or grounding point, the second screw is rotated to make the second clamp block close to the second clamping portion, and the weldment or grounding point is clamped by the cooperation of the second clamp block and the second clamping portion. When it is necessary to disconnect the connection between the weldment or grounding point and the electric welder, the second screw is rotated to make the second clamp block away from the second clamping portion, so that the weldment or grounding point can be loosened.

[0053] In this embodiment, if Figure 1 and Figure 3 As shown, the bus clamp 4 further includes a second operating handle, which is disposed on the second screw rod so as to rotate the second screw rod through the second operating handle.

[0054] Specifically, the second operating handle is installed on the end of the second screw rod facing away from the second clamping block, and the second operating handle is fixed on the second screw rod. For example, a mounting hole is opened on the second operating handle, and the second operating handle is connected to the second screw rod through an interference fit through the mounting hole. Of course, technicians in this field can also choose the connection method between the second operating handle and the second screw rod as needed, and there is no limitation here.

[0055] In this embodiment, if Figure 2As shown, the X direction in the figure is the first direction, and the Y direction in the figure is the second direction. A plurality of first installation cavities 11 are distributed in sequence along the first direction; a plurality of first installation cavities 11 and second installation cavities 12 are distributed along the second direction, and the first direction and the second direction are arranged orthogonally.

[0056] Furthermore, in the first direction, the branch line clamps 2 may not be arranged in the first installation cavities 11 located at both ends of the insulating box 1, and the bus cable 6 connecting the busbar 3 and the bus clamp 4 may pass through the first installation cavity 11 at the end of the insulating box 1, so that all cables can be led out from one side of the insulating box 1, making the overall wiring more tidy.

[0057] It should be noted that the busbar 3 is in the shape of an elongated strip, and the busbar 3 is opposite to the positions of the plurality of branch line clamps 2, so that the branch cables 5 between the branch line clamps 2 and the busbar 3 can be straightened and arranged, making the wiring more neat.

[0058] In this embodiment, if Figure 1 and Figure 2 As shown, the insulating wire box 1 includes an insulating box body 16 and an insulating cover body 17 . The insulating cover body 17 is detachably connected to the insulating box body 16 . The insulating box body 16 and the insulating cover body 17 enclose a plurality of first installation cavities 11 and second installation cavities 12 .

[0059] It can be understood that the insulating wire box 1 includes an insulating box body 16 and an insulating cover. When the branch line clamp 2 needs to be connected to the lead-out wire or ground wire of the welding machine, the insulating cover can be opened to expose the branch line clamp 2, thereby facilitating the connection between the branch line clamp 2 and the welding machine.

[0060] In this embodiment, the insulating cover 17 includes a plurality of sub-covers, each of which is hinged to the insulating box body 16, and each first installation cavity 11 corresponds to a sub-cover.

[0061] Since the number of branch line clamps 2 used is set according to the number of welding machines used, by making one first installation cavity 11 correspond to one sub-cover body, when connecting the welding machine and the branch line clamp 2, it is sufficient to open the sub-cover body corresponding to the first installation cavity 11, and there is no need to expose all the branch line clamps 2.

[0062] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A welding machine hub, characterized in that: include: An insulating wire box, wherein the insulating wire box has a plurality of first installation cavities and second installation cavities; A branch line clamp, wherein a plurality of branch line clamps are provided, each of the branch line clamps is provided in one of the first installation cavities, and the branch line clamp has a first connecting portion; A busbar, wherein the busbar is disposed in the second mounting cavity, and each of the branch line clamps is electrically connected to the busbar through a branch cable; A bus clamp is electrically connected to the busbar through a bus cable, and the bus clamp has a second connecting portion, and the second connecting portion is located outside the insulating wire box.

2. The welding machine hub according to claim 1, characterized in that: The insulating wire box is provided with a first wire-passing hole, and each of the first installation cavities is connected to the outside through one of the first wire-passing holes.

3. The welding machine hub according to claim 1, characterized in that: The plurality of first installation cavities are separated by a first insulating partition; And / or, the plurality of first installation cavities are separated from the second installation cavity by a second insulating partition.

4. The welding machine hub according to claim 3, characterized in that: The second insulating partition is provided with a second wire-passing hole, each of the first installation cavities is connected with the second installation cavity through the second wire-passing hole, and each branch cable between the branch line clamp and the busbar passes through the corresponding second wire-passing hole.

5. The welding machine hub according to claim 1, characterized in that: The branch line clamp comprises: A first wire clamp body, the first wire clamp body is connected to the insulating wire box, and the first wire clamp body has a first clamping portion; A first clamping member is connected to the first wire clamp body, and the first connecting portion is formed between the first clamping member and the first clamping portion.

6. The welding machine hub according to claim 5, characterized in that: The first clamping member comprises: a first screw, the first screw being threadably connected to the first clamp body; A first clamping block, wherein the first clamping block is connected to the first screw rod, and the first screw rod is used to drive the first clamping block to approach or move away from the first clamping portion.

7. The welding machine hub according to claim 6, characterized in that: The branch line clamp further includes a first operating handle disposed on the first screw rod so as to rotate the first screw rod through the first operating handle.

8. The welding machine hub according to claim 1, characterized in that: The plurality of first installation cavities are distributed in sequence along a first direction; A plurality of the first installation cavities and the second installation cavities are distributed along a second direction, and the first direction and the second direction are arranged orthogonally.

9. The welding machine hub according to any one of claims 1 to 8, characterized in that: The insulating wire box comprises an insulating box body and an insulating cover body, wherein the insulating cover body is detachably connected to the insulating box body, and the insulating box body and the insulating cover body enclose a plurality of the first installation cavities and the second installation cavities.

10. The welding machine hub according to claim 9, characterized in that: The insulating cover body includes a plurality of sub-cover bodies, each of the sub-cover bodies is hinged to the insulating box body, and each of the first installation cavities corresponds to one sub-cover body.

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