Connecting structure and welding gun

Abstract

The utility model discloses a connecting structure and a welding gun. The connecting structure comprises a connecting block, an elastic connecting piece and a connecting sleeve. The connecting sleeve comprises an inner sleeve and an outer sleeve, a first cavity and a second cavity which are communicated are formed in the outer sleeve, and the diameter of the first cavity is larger than that of the second cavity; the inner sleeve is arranged and attached to the interior of the first cavity. A third cavity and a fourth cavity which are communicated with each other are formed in the inner sleeve, and the fourth cavity is communicated with the second cavity; the elastic connecting piece is arranged in the fourth cavity, and the connecting block is arranged in the third cavity and the fourth cavity and connected with the elastic connecting piece. The connecting block comprises an open section and a closed section which are connected, when the connecting block is at the first position, the closed section isolates the third cavity from the fourth cavity, and when the connecting block is at the second position, the elastic connecting piece is compressed, and the third cavity is communicated with the fourth cavity through the open section. The problems that when one end of the connecting piece is assembled and disassembled, the assembling and disassembling efficiency is low, and original stored objects in the other end of the connecting piece are prone to leaking in the assembling and disassembling process are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to connecting technical field especially relates to a connecting structure and welding torch. BACKGROUND

[0002] The water-cooled welding torch is a tool specially designed for high-current welding, which reduces the high temperature generated during the welding process through circulating cooling water, thereby ensuring the stability of the welding process and the service life of the welding torch. The water-cooled welding torch mainly consists of a welding torch body, a cooling water system, a nozzle, a conducting nozzle and other parts. Among them, the cooling water system includes cooling water inlet and outlet pipes and other components, which reduces the temperature of the welding torch by circulating cooling water to prevent overheating damage. The water-cooled welding torch delivers cooling liquid (usually water or special cooling liquid) to the internal heat generating parts of the welding torch, such as the torch neck or the conducting part, through the water circulation system, absorbs and carries away the heat generated during the welding process, thereby achieving efficient heat dissipation. This cooling method is more effective than air cooling because the heat conduction efficiency of water is much higher than that of air. The welding torch connecting structure has multiple effects such as efficient heat dissipation, improved welding quality, extended equipment life, improved work efficiency, energy saving and environmental protection during the welding process.

[0003] However, when the existing welding torch is working and needs to replace the front conducting nozzle, the power supply and water tank need to be turned off, and then the nozzle needs to be pulled out. When the nozzle is pulled out, the stored water in the water-cooled system connected by the nozzle flows out, which has the risk of electric shock. The stored water needs to be cleaned before replacing the conducting nozzle, which has a high safety risk and affects work efficiency. SUMMARY

[0004] The technical problem to be solved by the utility model is that when the one-end connecting piece is assembled or disassembled, the assembly or disassembly efficiency is low and the original stored material in the other-end connecting piece is easily leaked in large quantities during the assembly or disassembly process.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] In the first aspect, the utility model provides a connecting structure, which comprises a connecting block, an elastic connecting piece and a connecting sleeve. The connecting sleeve comprises an inner sleeve and an outer sleeve. The outer sleeve is internally provided with a first cavity and a second cavity which are connected in communication. The diameter of the first cavity is larger than that of the second cavity. The inner sleeve is arranged in the first cavity and tightly fits in the first cavity. The inner sleeve is internally provided with a third cavity and a fourth cavity which are connected in communication. The fourth cavity is connected in communication with the second cavity. The elastic connecting piece is arranged in the fourth cavity. The connecting block is arranged in the third cavity and the fourth cavity and connected with the elastic connecting piece. The connecting block comprises an open section and a closed section which are connected. When the connecting block is in the first position, the closed section separates the third cavity and the fourth cavity. When the connecting block is in the second position, the elastic connecting piece is compressed, and the third cavity and the fourth cavity are connected in communication through the open section.

[0007] The connecting structure, the opening section comprises an end face opening part and a side wall opening part; the closing section comprises a first convex ring, a connecting ring, a second convex ring and an elastic connecting part connecting part, the second convex ring has a diameter larger than that of the first convex ring, and the second convex ring separates the third cavity and the fourth cavity when the connecting block is in the first position.

[0008] The connecting structure, a bevel shoulder transition section is arranged between the third cavity and the fourth cavity, and a first sealing ring is arranged between the first convex ring and the second convex ring, and the first sealing ring cooperates with the bevel shoulder transition section.

[0009] The connecting structure, a groove is arranged on a side wall of the third cavity (311), a second sealing ring (5) is arranged in the groove, and a groove matched with the second sealing ring (5) is arranged outside the side wall opening part (12).

[0010] The connecting structure, the second sealing ring (5) is close to the end face opening part (11).

[0011] The connecting structure, the side wall opening part (12) is three holes arranged on the side wall.

[0012] In the second aspect, the utility model provides a welding torch, including nozzle and torch body, adopt the connecting structure of any one in the first aspect to communicate the cooling system of nozzle,

[0013] Or, adopt the connecting structure of any one in the first aspect to communicate the cooling system of nozzle, and the torch body adopts epoxy resin pouring insulation.

[0014] The welding torch, the cooling system of the welding torch is integrated in the torch body, the torch body communicates the nozzle for the supply of the nozzle cooling system, the connecting sleeve is fixedly connected with the torch body, and the outer layer of the connecting sleeve is made of insulating material.

[0015] The welding torch, the outer layer of the nozzle is provided with at least one pin shaft, the outer layer of the torch body is provided with at least one fixing column, the pin shaft is provided with a hook, and the pin shaft is screw-connected with the nozzle.

[0016] When the nozzle is connected with the torch body, the hook is rotated around the pin shaft to be buckled with the fixing column, and then the pin shaft is screwed to the position of the hook to be fixed.

[0017] The welding torch, when the outer layer of the nozzle is provided with two pin shafts, and the outer layer of the torch body is provided with two fixing columns, the hook is adapted to the outer layer of the nozzle to extend a flip cover for rotating the hook.

[0018] The utility model reaches the beneficial effects:

[0019] The connection structure of this utility model adopts a combination design of a connecting block, an elastic connector, and a connecting sleeve. By utilizing the semi-conductive and semi-closed structure of the connecting block with one end open and connected to the side wall opening and the other end closed, it solves the problem of low loading and unloading efficiency and easy leakage of the original stored contents inside the other end connector during the loading and unloading process.

[0020] Specifically, this manifests as follows:

[0021] When the end to be connected is loaded, the end to be connected pushes the closed section of the connecting block to slide forward from one end of the fourth cavity of the connecting sleeve to the other end and squeezes the elastic connector, so that the two ends to be connected are connected through the fourth cavity of the connecting sleeve and the opening of the side wall of the connecting block. The storage at the other end to be connected is transported to the end to be connected in sequence through the second cavity, the fourth cavity, the opening of the side wall of the connecting block, the opening of the end face of the connecting block and the first cavity.

[0022] When the end to be connected is unloaded, the opening of the connecting block end face does not have a thrust to push the connecting block closing section. The elastic connector pushes the connecting block closing section back to one end of the fourth cavity due to the elastic deformation principle. The connecting block closing section isolates the third cavity and the fourth cavity, and the two ends of the connecting sleeve are separated by the closing section, so that the stored contents of the other end to be connected will not leak in large quantities due to the unloading of the end to be connected.

[0023] Given that the connection structure of this utility model allows the connectors at both ends of the connection structure to conduct when the connector is loaded, and the connector at the other end to close when the connector at one end is unloaded, the conveying of the original contents stored in the connector at the other end can be continued without stopping the loading and unloading process when the connector at one end is loaded or unloaded, thus simplifying the loading and unloading process, allowing for immediate use and improving loading and unloading efficiency.

[0024] When one end of the connector is unloaded, in order to optimize the separation effect of the closed section of the connecting block, the connecting structure of this utility model adds a first sealing ring to the side wall of the closed section. In addition to the sealing effect, the first sealing ring also has a certain shock absorption effect, reducing the mechanical wear caused by repeated loading to the connecting sleeve shoulder transition section and the closed section of the connecting block.

[0025] The end face of the connecting block closed section of the connection structure of this utility model near the elastic connector is set as the elastic connector connection part. The elastic connector connection part has a certain positioning and guiding effect on the elastic connector, making the connection between the connecting block and the elastic connector more stable.

[0026] The connection structure of this utility model is equipped with a second sealing ring to improve the anti-leakage effect between the third cavity of the connecting sleeve and the connecting block or the connecting parts that connect the connecting block, and to reduce the probability of the stored material in the fourth cavity of the connecting sleeve leaking from the gap between the outer wall of the connecting block and the third cavity of the connecting sleeve.

[0027] The connecting sleeve of the connecting structure comprises an inner sleeve and an outer sleeve, when the connecting structure is assembled, the connecting block and the elastic connecting piece are sequentially placed into the inner sleeve, then the inner wall of the inner sleeve and the inner wall of the outer sleeve are fixed, and the inner cavity structure of the connecting structure is formed, the inner cavity structure is large in the middle and small at both ends, and the elastic connecting piece can be limited in the middle.

[0028] The welding gun uses the cooling system of the connecting structure to connect the nozzle, so that the nozzle can be assembled and disassembled without stopping the water supply of the water tank, the assembly and disassembly process is simplified, the welding gun can be used immediately after assembly, the assembly and disassembly efficiency is improved, and a large amount of cooling water is not leaked during the assembly and disassembly process.

[0029] The connecting structure is integrated into the gun body of the welding gun, the volume is small, and the structure is compact.

[0030] In order to further improve the assembly and disassembly efficiency of the welding gun, a structure convenient for fixing and disassembling is designed by combining a pin shaft, a fixing column and a hook. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a cross-sectional structure schematic view of a connecting structure of the embodiment 1 of the utility model;

[0032] Figure 2 is a structure schematic view of a connecting block 1 of the embodiment 1 of the utility model;

[0033] Figure 3 is a connecting structure in a connected state schematic view of the embodiment 1 of the utility model;

[0034] Figure 4 is a connecting structure in a separated state schematic view of the embodiment 1 of the utility model;

[0035] Figure 5 is a structure schematic view of a welding gun of the embodiment 2 of the utility model;

[0036] Figure 6 is a partial cross-sectional structure schematic view of the welding gun of the embodiment 2 of the utility model when the nozzle and the gun body are not connected;

[0037] Figure 7 is a partial cross-sectional structure schematic view of the welding gun of the embodiment 2 of the utility model when the nozzle and the gun body are connected;

[0038] EXPLANATION OF REFERENCE NUMERALS:

[0039] 1-connection block; 11-end face opening part; 12-side wall opening part; 121-tapered processing groove; 13-closed section; 131-first convex ring; 132-connection ring; 133-second convex ring; 134-elastic connecting piece connection part; 2-elastic connecting piece; 3-connection sleeve; 31-inner sleeve; 311-third cavity; 3111-inclined shoulder transition section; 312-fourth cavity; 32-outer sleeve; 321-first cavity; 322-second cavity; 4-first sealing ring; 5-second sealing ring; 6-nozzle; 61-pin shaft; 62-hook; 63-flap; 7-gun body; 71-fixing column; 8-cooling water. DETAILED DESCRIPTION

[0040] The technical solutions in the utility model will be clearly and completely described below in combination with the drawings of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, rather than any limitation on the utility model and its application or use.

[0041] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only used to explain the relative position relationship, movement condition and the like between the components in a certain posture. If the certain posture changes, the directional indication also changes accordingly. It is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specified.

[0042] In addition, in the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0043] Example 1

[0044] This embodiment introduces a connection structure, such as Figure 1The cross-sectional structure schematic view shows that the connecting structure comprises a connecting block 1, an elastic connecting piece 2 and a connecting sleeve 3; the connecting sleeve 3 comprises an inner sleeve 31 and an outer sleeve 32, the inner sleeve 31 is arranged in the first cavity 321, and the inner sleeve 31 is tightly fitted in the first cavity 321; the inner sleeve 31 is internally provided with a third cavity 311 and a fourth cavity 312 which are communicated, and the fourth cavity 312 is communicated with the second cavity 321; the elastic connecting piece 2 is arranged in the fourth cavity 312, the connecting block 1 is arranged in the third cavity 311 and the fourth cavity 312 and connected with the elastic connecting piece 2; the connecting block 1 comprises an open section and a closed section 13, when the connecting block 1 is in the first position, the closed section 13 isolates the third cavity 311 and the fourth cavity 312, when the connecting block 1 is in the second position, the elastic connecting piece 2 is compressed, and the third cavity 311 and the fourth cavity 312 are communicated through the open section.

[0045] The connecting structure of the utility model connects the connecting pieces of two ends, utilizes the half-conducting half-closed structure characteristics that one end of connecting block 1 is open and communicates with the other end closed, as shown in Figure 3 and Figure 4 The connecting structure of the utility model has two working states of communication and separation, solves the problems that the dismounting efficiency is low and the original storage material in the other end connecting piece is easy to leak a lot during the dismounting process when one end connecting piece is mounted or dismounted.

[0046] The open end 11 of connecting block 1 is processed by a drill bit, and the end face of the closed section 13 close to the side wall opening 12 is provided with a processing groove left by the drill bit, different drill bit shapes generate different shaped processing grooves, in the embodiment, as shown in Figure 1 The end face of the closed section 13 close to the side wall opening 12 is provided with a tapered processing groove 121.

[0047] As shown in Figure 2 The open section comprises an end face opening part 11 and a side wall opening part 12; the closed section 13 comprises a first convex ring 131, a connecting ring 132, a second convex ring 133 and an elastic connecting piece connecting part 134, the diameter of the second convex ring 133 is larger than that of the first convex ring 131, and the second convex ring (133) isolates the third cavity and the fourth cavity when the connecting block 1 is in the first position.

[0048] Combined with Figure 1 , Figure 3 and Figure 4As shown, the connecting part 134 of the elastic connector is in the shape of a boss, which has a certain positioning and guiding effect on the elastic connector 2, making the connection between the connecting block 1 and the elastic connector 1 more stable, ensuring the left and right back and forth movement of the elastic connector 2 in the fourth cavity 312, effectively reducing the probability that the elastic connector 2 will be unevenly stressed and flipped vertically and stuck in the fourth cavity 312 when frequently used, thus failing to work properly.

[0049] Combination Figures 1 to 4 As shown, a sloping transition section 3111 is provided between the third cavity 311 and the fourth cavity 312, and a first sealing ring 4 is provided between the first convex ring 131 and the second convex ring 133. The first sealing ring 4 cooperates with the sloping transition section 3111. Figure 4 As shown, when the connecting structure is in the separated working state, the setting of the first sealing ring 4 further improves the separation effect of the closed section of the connecting block 1. At the same time, it also provides a certain shock absorption effect and reduces the mechanical wear of the closed section 13 and the sloping shoulder transition section 3111.

[0050] like Figure 1 As shown, a groove is provided on the side wall of the third cavity 311, and a second sealing ring 5 is provided in the groove. A groove that mates with the second sealing ring 5 is provided on the outer side of the side wall opening 12. The second sealing ring 5 is located near the end face opening 11. Figure 3 and Figure 4 As shown, the second sealing ring 5 ensures that the connection structure can prevent leakage between the outer wall of the connecting block 1 and the inner wall 302 of the connecting sleeve 3 in both connected and separated working states. It is worth noting that both the first sealing ring 4 and the second sealing ring 5 should be made of elastic material. When the connecting block 1 slides left and right, the combined design of the groove on the side wall of the third cavity 311, the second sealing ring 5, and the groove in the side wall opening 12 ensures that the second sealing ring 5 does not shift while also ensuring the normal sliding effect of the connecting block 1. Furthermore, the first sealing ring 4 and the second sealing ring 5 should possess corresponding properties, such as corrosion resistance, high temperature resistance, and low temperature resistance, depending on the characteristics of the material being transported by the connection structure.

[0051] like Figures 1 to 4 As shown, when assembling the connection structure of this utility model, the connecting block 1 and the elastic connector 2 are placed into the inner sleeve in sequence, and then the outer wall of the inner sleeve 31 and the inner wall of the outer sleeve 32 are glued together to form a cavity structure that is large in the middle and small at both ends and can limit the elastic connector 2 in the middle.

[0052] like Figures 1 to 4 As shown, the sidewall opening 12 consists of three holes formed on the sidewall. In this embodiment, the three holes of the sidewall opening 12 are rectangular in shape, but they can also be other numbers and / or other shapes of holes. The shape and number should not be regarded as a limitation of this utility model.

[0053] Example 2

[0054] On the basis of the above embodiment 1, this embodiment introduces a welding gun, including nozzle 6 and gun body 7, as shown in Figures 5 to 7 The welding gun of this embodiment uses the connecting structure in embodiment 1 to connect the cooling system of the nozzle 6, the gun body 7 integrates the cooling system of the gun barrel and the nozzle, the right gun body 7 is connected to the left nozzle 6 for the supply of the nozzle 6 cooling system, and the nozzle 6 is directly plugged into the gun body 7 through the connecting structure of embodiment 1. The structure is compact and does not occupy additional space.

[0055] The welding gun of this embodiment uses the connecting structure of embodiment 1 to connect the cooling system of the nozzle, which can make it unnecessary to stop the water supply of the water tank when the nozzle is installed or removed, simplifying the installation and removal process, allowing it to be used immediately after installation, improving the installation and removal efficiency, and preventing a large amount of cooling water from leaking during the installation and removal process.

[0056] As shown in Figure 5 The gun body 7 of the welding gun is made of epoxy resin casting insulation, which fills the gap between the two gun barrels of the gun body 7. Epoxy resin can provide a shear and tensile strength of 31Mpa and a dielectric strength of 30KV / mm. Since the connection between the gun barrels is not subject to external forces, it can meet the positioning and insulation requirements of the gun barrels. The original processing part connection form requires additional connection and fastening space, which can be eliminated after epoxy resin casting, reducing the space by more than 50%.

[0057] When the welding gun is working, the gun barrel inside the gun body 7 is electrified, and the outer layer of the nozzle 6 is not electrified. Since the gun body 7 and the nozzle 6 are frequently disassembled, the connecting structure needs to be insulated. The connecting sleeve 3 is fixed to the gun body 7, as shown in Figure 6 and Figure 7 The connection between the nozzle and the gun body is shown. The left end of the connecting sleeve 3 is used for plugging the nozzle 6, and the right end of the connecting sleeve 3 is connected to the cooling water 8 of the gun body 7. The cooling water 8 is used for cooling the nozzle 6, and the two-way cooling water 8 is divided into one-way cooling water and one-way cooling backwater.

[0058] The connecting sleeve 3 in embodiment 1 includes an inner sleeve 31 and an outer sleeve 32. The two-layer design structure allows the inner and outer parts of the connecting sleeve 3 to be made of different materials, which is suitable for more application scenarios. The outer layer of the connecting sleeve 3 is made of insulating material. In this embodiment, the inner sleeve 31 is made of metal material to ensure the durability of the connecting sleeve 3 during repeated plugging and unplugging of the nozzle 6. The outer sleeve 32 is made of insulating material to ensure the insulation performance of the connecting sleeve 3.

[0059] The outer layer of the outer sleeve 32 can be designed to fit the shape of the gun body, which can be any shape that fits the gun body. In this embodiment, the connecting end of the outer sleeve 32 is provided with threads (not shown in the figure) that are adapted to the gun body 7. The outer sleeve 32 is fixed to the gun body 7 through the threads and thread sealant, ensuring the stability and sealing performance of the connection.

[0060] In order to further improve the mounting and dismounting efficiency of the welding gun, the pin shaft 61, the fixing column 71 and the hook 62 are combined to design a convenient fixing and dismounting structure.

[0061] Combining Figure 5 As shown in the schematic view of the welding gun structure, the outer layer of the nozzle 6 is provided with at least one pin shaft 61, the outer layer of the gun body 7 is provided with at least one fixing column 71, the pin shaft 61 is sleeved with the hook 62, the pin shaft 61 is threadedly connected with the nozzle 7, when the nozzle 6 is connected with the gun body 7, the hook 62 is rotated around the pin shaft 61 to be buckled with the fixing column 71, and then the pin shaft 61 is screwed to the position of the hook 62 to be fixed. In the embodiment, the outer layer of the nozzle 6 is provided with two pin shafts 61, the outer layer of the gun body 7 is provided with two fixing columns 71, in order to facilitate the unified operation of the hooks 62 on both sides, as shown in the figure, the hook 62 is extended with the flip cover 63 outside the nozzle 6 for rotating the hook 62. Figure 5

[0062] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative but not restrictive, and the person skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection of the utility model.​

Claims

1. A connection structure characterized by comprising: The connecting structure comprises a connecting block (1), an elastic connecting piece (2) and a connecting sleeve (3); The connecting sleeve (3) comprises an inner sleeve (31) and an outer sleeve (32), and the inner sleeve (31) is arranged in the first cavity (321). The inner sleeve (31) is arranged in the first cavity (321) and tightly fits the inner wall of the first cavity (321). The elastic connecting piece (2) is arranged in the fourth cavity (312), and the connecting block (1) is arranged in the third cavity (311) and the fourth cavity (312) and connected with the elastic connecting piece (2). The connecting block (1) comprises an opening section and a closed section (13).

2. The connection structure according to claim 1, characterized in that The opening section comprises an end face opening part (11) and a side wall opening part (12).

3. The connection structure according to claim 2, characterized in that The closed section (13) comprises a first convex ring (131), a connecting ring (132), a second convex ring (133) and an elastic connecting piece connecting part (134).

4. The connection structure according to claim 2, characterized by The second convex ring (133) has a larger diameter than the first convex ring (131).

5. The connection structure according to claim 4, characterized in that A first sealing ring (4) is arranged between the first convex ring (131) and the second convex ring (133).

6. The connection structure according to claim 2, wherein A groove is arranged on the side wall of the third cavity (311), and a second sealing ring (5) is arranged in the groove.

7. A welding torch comprising a nozzle (6) and a torch body (7), characterized in that The second sealing ring (5) is close to the end face opening part (11). The side wall opening part (12) is three holes arranged on the side wall.

8. The welding torch of claim 7, wherein, The connecting structure is used for connecting the cooling system of the nozzle (6), Or, the connecting structure is used for connecting the cooling system of the nozzle (6), and the gun body (7) is made of epoxy resin. The cooling system of the welding gun is integrated in the gun body (7), the gun body (7) is connected with the nozzle (6) for supplying the cooling system of the nozzle (6), the connecting sleeve (3) is fixedly connected with the gun body (7), and the outer layer of the connecting sleeve (3) is made of insulating material.

9. The welding torch of claim 8, wherein, The outer layer of the nozzle (6) is provided with at least one pin shaft (61), the outer layer of the gun body (7) is provided with at least one fixing column (71), the pin shaft (61) is sleeved with a hook (62), and the pin shaft (61) is threadedly connected with the nozzle (6); When the nozzle (6) is connected with the gun body (7), the hook (62) is rotated around the pin shaft (61) to be buckled with the fixing column (71), and then the pin shaft (61) is screwed to the position of the hook (62) to be fixed.

10. The welding torch of claim 9, wherein, When the outer layer of the nozzle (6) is provided with two pin shafts (61) and the outer layer of the gun body (7) is provided with two fixing columns (71), the hook (62) is adapted to the outer layer of the nozzle (6) extending a flip cover (63) for rotating the hook (62).

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