Handheld welding machine

Abstract

The utility model provides a handheld welding machine which comprises two shells, a welding head and a welding head. A mounting cavity for mounting the bolt head of the conductive bolt and an opening for a first screw of the conductive bolt to extend out are defined by the two clamping seats, a cross-shaped insertion block is formed at the end, facing the inner wall of the shell, of each clamping seat, and a cross-shaped insertion groove matched with the cross-shaped insertion block in an insertion mode is formed in the inner wall of the shell; the welding rod clamping piece comprises a second screw rod and a plurality of elastic arms arranged at one end of the second screw rod, a first threaded hole in threaded connection with the first screw rod is formed in the second screw rod, and a clamping groove used for clamping a welding rod is formed among the elastic arms. In the assembling process, the cross-shaped insertion blocks of the two clamping seats are correspondingly inserted into the cross-shaped insertion grooves of the shell, after the conductive bolts are installed, the conductive bolts are placed between the two clamping seats, and therefore even if the clamping seats deform due to too high temperature, only the clamping seats need to be replaced, the whole shell does not need to be replaced, and maintenance and replacement cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of welding machine technology, specifically to a handheld welding machine. Background Technology

[0002] Welding machines use the high-temperature electric arc generated when the positive and negative electrodes are short-circuited momentarily to melt the solder on the welding rod and the material being welded, thus bonding the objects together.

[0003] Existing handheld welding machines include a gun body and a clamp connector located at the front of the gun body for fixing the welding rod. The clamp connector is connected to the circuit board via a cable. The gun body is formed by assembling two shells, and the inner wall of the shell is formed with a groove suitable for installing the clamp connector. Because the clamp connector operates at a very high temperature, the shell is prone to deformation under prolonged use, increasing maintenance costs. Utility Model Content

[0004] Therefore, this utility model provides a handheld welding machine, including two housings, two card holders, and a welding rod holder. The two housings are arranged opposite each other and enclose each other to form a cavity. The two opposite card holders enclose each other to form a mounting cavity for mounting the bolt head of a conductive bolt and an opening for the first screw of the conductive bolt to extend out. A cross-shaped insert is formed at one end of the card holder facing the inner wall of the housing, and a cross-shaped slot adapted to be inserted into the cross-shaped insert is formed on the inner wall of the housing. The welding rod holder includes a second screw and a plurality of elastic arms provided at one end of the second screw. The second screw is formed with a first threaded hole that is threaded to the first screw, and a clamping groove for clamping the welding rod is formed between the plurality of elastic arms.

[0005] It also includes a screw cap, the rear end of which is formed with a third threaded hole that is threadedly connected to the second screw, and the front end of which is formed with a flared mouth, the diameter of which gradually increases from the front end of the screw cap to the rear end.

[0006] It also includes a clamping washer that is threadedly connected to the first screw, the clamping washer engaging with the bolt head to clamp the end of the cable.

[0007] The cavity is fitted with a fan, circuit board assembly and transformer sequentially from its rear end to its front end.

[0008] The circuit board assembly includes a first circuit board and a second circuit board arranged vertically, and the first circuit board and the second circuit board are connected by pin headers or wires.

[0009] Both the first circuit board and the second circuit board are provided with a heat dissipation channel located in the middle, and multiple electronic components distributed on both sides of the heat dissipation channel. The fan is installed at one end of the heat dissipation channel and the transformer is installed at the other end.

[0010] The technical solution of this utility model has the following advantages:

[0011] 1. The handheld welding machine provided by this utility model, when assembled, first insert the cross-shaped plugs of the two card holders into the cross-shaped slots of the housing, install the conductive bolts, and then place the conductive bolts between the two card holders. In this way, even if the card holders deform due to excessive temperature, only the card holders need to be replaced, without replacing the entire housing, thereby reducing maintenance and replacement costs.

[0012] 2. The handheld welding machine provided by this utility model has a third threaded hole formed at the rear end of the nut, which is threaded to the second screw, and a flared mouth formed at the front end, with the diameter of the flared mouth gradually increasing from the front end to the rear end of the nut. When the nut is tightened, multiple elastic elements clamp the welding rod more tightly due to the reduced diameter of the flared mouth, making it convenient to use.

[0013] 3. The handheld welding machine provided by this utility model has a heat dissipation channel located in the middle of the first circuit board and the second circuit board, as well as multiple electronic components distributed on both sides of the heat dissipation channel. A fan is installed at one end of the heat dissipation channel and a transformer is installed at the other end, which is more conducive to heat dissipation of electronic components. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the handheld welding machine of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure after removing part of the shell;

[0017] Figure 3 This is an exploded structural diagram of two housings, two mounting brackets, and conductive bolts.

[0018] Figure 4 This is an exploded structural diagram of two card holders and conductive bolts;

[0019] Figure 5 This is a schematic diagram of the assembly of two card holders and conductive bolts;

[0020] Figure 6 This is a three-dimensional view of the shell;

[0021] Figure 7This is an assembly diagram of the conductive bolt, welding rod holder, and rotating cap.

[0022] Figure 8 This is a breakdown diagram of the conductive bolt, welding rod holder, and rotating cap.

[0023] Figure 9 This is a cross-sectional view of the swivel cap;

[0024] Figure 10 This is a side view of the circuit board assembly.

[0025] Explanation of reference numerals in the attached drawings: 1. Conductive bolt; 2. Circuit board assembly; 3. Bolt head; 4. First screw; 5. Welding electrode holder; 6. Second screw; 7. Elastic arm; 8. First threaded hole; 11. Screw cap; 12. Third threaded hole; 13. Flared mouth; 14. Pressure washer; 16. First circuit board; 17. Second circuit board; 18. Fan; 19. Transformer; 20. Heat dissipation channel; 21. Electronic component; 22. Housing; 23. Card slot; 24. Mounting cavity; 25. Opening; 26. Cross-shaped insert; 27. Cross-shaped slot. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Example

[0031] This embodiment provides a handheld welding machine, such as Figure 1 and Figure 2 As shown, it includes a housing 22, a card holder 23, a welding rod holder 5, a fan 18, a circuit board assembly 2, and a transformer 19.

[0032] The two housings 22 are arranged opposite each other, as shown below. Figure 3 As shown, the two housings 22 enclose a cavity. From its rear end to its front end, the cavity is sequentially fitted with a fan 18, a circuit board assembly 2, and a transformer 19.

[0033] like Figure 4 and Figure 5 As shown, two opposing retainers 23 enclose a mounting cavity 24 for mounting the bolt head 3 of the conductive bolt 1, and an opening 25 for the first screw 4 of the conductive bolt 1 to extend out. A cross-shaped insert 26 is formed at one end of the retainer 23 facing the inner wall of the housing 22. Figure 6 As shown, the inner wall of the housing 22 is formed with a cross-shaped slot 27 that is adapted to be inserted into the cross-shaped plug 26. It also includes a clamping washer 14 that is threadedly connected to the first screw 4. The clamping washer 14 cooperates with the bolt head 3 to clamp the end of the cable.

[0034] Electrode holder 5, such as Figure 7 and Figure 8 As shown, it includes a second screw 6 and a plurality of elastic arms 7 provided at one end of the second screw 6. The second screw 6 is formed with a first threaded hole 8 that is threadedly connected to the first screw 4. A clamping groove for holding welding rods is formed between the plurality of elastic arms 7.

[0035] like Figure 8 and Figure 9 As shown, the rear end of the screw cap 11 is formed with a third threaded hole 12 that is threadedly connected to the second screw 6, and the front end is formed with a flared mouth 13, the diameter of which gradually increases from the front end to the rear end of the screw cap 11.

[0036] like Figure 10As shown, the circuit board assembly 2 includes a first circuit board 16 and a second circuit board 17 arranged vertically, connected by pin headers or wires. Both the first circuit board 16 and the second circuit board 17 have a heat dissipation channel 20 located in their central parts, and multiple electronic components 21 distributed on both sides of the heat dissipation channel 20. A fan 18 is installed at one end of the heat dissipation channel 20, and a transformer 19 is installed at the other end.

[0037] The handheld welding machine provided by this utility model, during assembly, first inserts the cross-shaped plugs 26 of the two card holders 23 into the cross-shaped slots 27 of the housing 22, inserts the conductive bolts 1, and then places the conductive bolts 1 between the two card holders 23. In this way, even if the card holders 23 deform due to excessive temperature, only the card holders need to be replaced, without replacing the entire housing, thereby reducing maintenance and replacement costs.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A handheld welding machine, characterized in that, include: Two shells (22) are arranged opposite to each other, and the two shells (22) enclose each other to form a cavity; Two opposing mounting bases (23) enclose a mounting cavity (24) for mounting the bolt head (3) of the conductive bolt (1) and an opening (25) for the first screw (4) of the conductive bolt (1) to extend out. A cross-shaped insert (26) is formed at one end of the mounting base (23) facing the inner wall of the housing (22). A cross-shaped slot (27) adapted to be inserted into the inner wall of the housing (22) is formed on the inner wall of the housing (22). The electrode holder (5) includes a second screw (6) and a plurality of elastic arms (7) disposed at one end of the second screw (6). The second screw (6) is formed with a first threaded hole (8) that is threadedly connected to the first screw (4). A clamping groove for holding the electrode is formed between the plurality of elastic arms (7).

2. The handheld welding machine according to claim 1, characterized in that, It also includes a screw cap (11), the rear end of which is formed with a third threaded hole (12) that is threadedly connected to the second screw (6), and the front end is formed with a flared mouth (13), the diameter of which gradually increases from the front end to the rear end of the screw cap (11).

3. The handheld welding machine according to claim 1, characterized in that, It also includes a clamping washer (14) threadedly connected to the first screw (4), the clamping washer (14) cooperating with the bolt head (3) for clamping the end of the cable.

4. The handheld welding machine according to claim 1, characterized in that, The cavity is fitted with a fan (18), a circuit board assembly (2), and a transformer (19) in sequence from its rear end to its front end.

5. The handheld welding machine according to claim 4, characterized in that, The circuit board assembly (2) includes a first circuit board (16) and a second circuit board (17) arranged vertically, and the first circuit board (16) and the second circuit board (17) are connected by pin headers or wires.

6. The handheld welding machine according to claim 5, characterized in that, Both the first circuit board (16) and the second circuit board (17) are provided with a heat dissipation channel (20) located in the middle, and a plurality of electronic components (21) distributed on both sides of the heat dissipation channel (20). The fan (18) is installed at one end of the heat dissipation channel (20), and the transformer (19) is installed at the other end.

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