Wire feeding mechanism for gas shielded welding machine

Abstract

The utility model discloses a wire feeding mechanism for a gas shielded welding machine. The wire feeding mechanism comprises a shell, a wire feeding wheel and a pressing wheel assembly, wherein the wire feeding wheel and the pressing wheel assembly are arranged on the shell. The wire feeding wheel is in transmission connection with the driving motor through a speed reducing structure; a wire feeding seat and a wire discharging seat are respectively arranged on the shell and positioned on two sides of the wire feeding wheel; a connecting piece is arranged on the wire outlet seat; the connecting piece comprises a wire feeding pipe, a mounting head, and a copper connecting sheet and an air pipe joint which are arranged on the mounting head; the wire feeding pipe is mounted in the wire outlet seat; a wire outlet hole, an air outlet hole and two wiring through holes are formed in the mounting head; the wire outlet hole is communicated with the wire feeding pipe, and the air outlet hole is communicated with the air pipe connector. During use, the wire feeding pipe, the gas source pipe, the conductive wire, the signal wire and the like are integrally arranged on the connecting piece, then the connecting piece is connected with the European-style interface on the welding gun in a matched mode, at the moment, operation is convenient, the whole machine after installation is compact in structure and small in size, and therefore the wire feeding requirement of the small gas shielded welding machine can be met.

Description

Technical Field

[0001] This utility model belongs to the field of welding equipment technology, specifically relating to a wire feeding mechanism for a gas shielded welding machine. Background Technology

[0002] Gas shielded welding machines are commonly used for metal welding. They prevent the weld from contacting oxygen and moisture in the air by providing a protective gas (such as an inert gas) during the welding process, thereby reducing oxidation and contamination and improving weld quality. Compared with other arc welding machines, gas shielded welding machines are characterized by high efficiency, low cost, and strong oxidation resistance, and are currently widely used for welding ferrous metals such as low-carbon steel and low-alloy steel.

[0003] Gas-shielded welding machines mainly consist of a welding power source, wire feeding mechanism, welding torch, gas supply system, and control system. During use, the positive terminal of the welding power source is connected to the welding torch, and the negative terminal is connected to the workpiece. Additionally, the welding torch needs to be connected to the wire feed tube, the gas supply outlet tube, and the control cable of the control system. Currently, welding torches on the market are mainly equipped with European-style interfaces and Panasonic interfaces. Panasonic interfaces have wire feed tube connectors, gas pipe connectors, and signal connectors on the welding torch. During use, these connectors need to be connected to the corresponding components on the welding machine via the wire feed tube, gas supply tube, conductive wire, and signal wire. The welding machine then supplies the welding torch with welding wire, gas, electricity, and transmits signals. This method is more cumbersome to assemble and occupies more space. European-style interfaces, on the other hand, integrate multiple connectors into a single interface, requiring only one connection during use. Therefore, a connector compatible with this European-style interface needs to be provided on the welding machine. Utility Model Content

[0004] This invention provides a wire feeding mechanism for a gas shielded welding machine, addressing the aforementioned problems in the prior art. The wire feeding mechanism of this invention optimizes the existing structure by adding a connector with a specific construction. In use, the wire feeding tube, gas source tube, conductive wire, signal wire, etc., can be integrated onto this connector, which is then connected to the European-style interface on the welding torch. Operation is convenient, and the completed machine has a compact structure and small size, thus meeting the wire feeding requirements of small gas shielded welding machines and improving product competitiveness. Furthermore, the connector's small size facilitates processing and installation, resulting in lower modification costs.

[0005] The technical solution of this application is as follows:

[0006] A wire feeding mechanism for a gas shielded welding machine includes a housing and a wire feeding wheel and a pressure wheel assembly mounted on the housing. The wire feeding wheel is connected to a drive motor via a reduction gear. The pressure wheel assembly is used to press the welding wire onto the wire feeding wheel for transmission during operation of the wire feeding mechanism. On the housing, a wire inlet seat and a wire outlet seat are respectively provided on both sides of the wire feeding wheel. A connecting component is provided on the wire outlet seat. The connecting component includes a wire feeding tube, a mounting head, and a copper connecting piece and a gas pipe connector mounted on the mounting head. The wire feeding tube is installed inside the wire outlet seat. The mounting head has a wire outlet hole, a gas outlet hole, and two wiring through holes. The wire outlet hole communicates with the wire feeding tube, and the gas outlet hole communicates with the gas pipe connector.

[0007] Compared with existing technologies, the wire feeding mechanism for gas shielded welding machines in this application is optimized based on the original structure. A connector is installed on the wire outlet seat. This connector consists of a wire feeding tube, an mounting head, a copper connecting piece, and a gas pipe connector. The mounting head has a wire outlet hole, a gas outlet hole, and a wiring through hole. In use, the wire feeding tube, gas source pipe, conductive wire, signal wire, etc. can be integrated and set on the connector. Then, the connector is connected to the European interface on the welding torch. The operation is more convenient, and the overall structure of the machine after installation is compact and small in size, which can meet the wire feeding requirements of small gas shielded welding machines and improve product competitiveness. In addition, the overall structure of the connector is simple and easy to process, and the installation with the wire outlet seat is also convenient, resulting in low modification costs.

[0008] As an optimization, in the aforementioned wire feeding mechanism for gas-shielded welding machines, the copper connecting piece is located between the gas pipe connector and the mounting head, and the gas pipe connector and the mounting head are fixed by a threaded connection. Therefore, the copper connecting piece can be directly fixed to the mounting head via the gas pipe connector, making installation more convenient. Furthermore, the close proximity of the gas pipe connector and the copper connecting piece further reduces the overall size.

[0009] As an optimization, in the aforementioned wire feeding mechanism for a gas-shielded welding machine, a cover plate is provided on the top of the wire outlet seat; the cover plate is fixedly connected to the wire outlet seat, confining the wire feeding tube within the cavity between the cover plate and the wire outlet seat. The connection piece is fixed to the housing through the cooperation of the cover plate and the wire outlet seat, making installation convenient and easy to implement. Furthermore, a limiting groove is provided on the outer circumferential surface of the wire feeding tube, and correspondingly, limiting protrusions are provided on the inner walls of the wire outlet seat and the cover plate. The cooperation of the limiting protrusions and the limiting groove limits the connection piece, improving the connection stability between the connection piece and the housing. Furthermore, the wire feeding tube is stepped, with its large end connected to the mounting head and its small end facing the wire inlet seat.

[0010] As an optimization, in the aforementioned wire feeding mechanism for gas-shielded welding machines, the reduction structure is a multi-stage gear transmission structure. By combining multiple gears, the total reduction ratio can be distributed across each stage, achieving a higher overall reduction ratio. This allows the wire feeding wheel to rotate at a slower speed during operation, preventing damage to the welding wire due to excessive speed.

[0011] As an optimization, in the aforementioned wire feeding mechanism for gas-shielded welding machines, the pressure roller assembly includes a detachably connected pressure roller and a pressure roller frame; the interior of the pressure roller frame is divided into a limiting cavity by a set of limiting strips; the pressure roller is located within the limiting cavity. Therefore, pressure rollers of different sizes can be replaced as needed to accommodate welding wires of different sizes and specifications, resulting in good versatility.

[0012] Furthermore, one end of the pressure roller frame is rotatably connected to the housing, and the other end has a slot; the slot cooperates with a limiting rod to limit the pressure roller frame; the limiting rod is rotatably connected to the wire feed seat. By cooperating with the slot on the pressure roller frame, the limiting rod effectively prevents the pressure roller from detaching from the pressure roller frame, improving the stability of the overall structure during operation; in addition, when it is necessary to replace the pressure roller, it is only necessary to lift the limiting rod to disengage it from the slot, which is very convenient.

[0013] Furthermore, the limiting rod includes a limiting head and a rotating sleeve; the rotating sleeve is rotatably connected to the wire feed seat, and a limiting groove is formed inside the rotating sleeve; a limiting block is provided in the limiting groove; the limiting block is connected to the limiting head through a connecting rod. Dividing the limiting rod into multiple components makes installation more convenient; moreover, there are specific mating relationships between the components, resulting in high overall stability after assembly.

[0014] Furthermore, the wire feed seat is equipped with a rotating shaft; the rotating sleeve is fitted outside the rotating shaft and can rotate relative to the rotating shaft; the rotating shaft has a hollow structure, and a wire feed tube is installed inside it. The wire feed tube is arranged correspondingly to the wire feeding wheel, which can play a role in transmitting the welding wire and is conducive to improving the overall wire feeding efficiency of the wire feeding mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the wire feeding mechanism for the gas shielded welding machine in this application;

[0016] Figure 2 yes Figure 1 Front view of the wire feeding mechanism;

[0017] Figure 3 This is a schematic diagram of the shell structure in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the cover plate in an embodiment of this application;

[0019] Figure 5 This is a schematic diagram of the pressure roller assembly in the embodiments of this application;

[0020] Figure 6 This is a schematic diagram of the deceleration structure in the embodiments of this application;

[0021] Figure 7 This is a schematic diagram of the connector structure in an embodiment of this application;

[0022] Figure 8 This is a schematic diagram of the wire feeding tube and mounting head in the embodiments of this application;

[0023] Figure 9 This is a schematic diagram of the limiting rod in the embodiment of this application.

[0024] The markings in the attached diagram are as follows: 1-Housing, 11-Infeed seat, 12-Outfeed seat, 13-Cover plate, 14-Limiting protrusion, 15-Rotating shaft; 2-Feeding roller; 3-Pressure roller assembly, 31-Pressure roller, 32-Pressure roller frame, 33-Limiting strip, 34-Limiting cavity, 35-Slot; 4-Reduction structure; 5-Drive motor; 6-Connecting parts, 61-Feeding tube, 611-Limiting groove, 62-Mounting head, 621-Outfeed hole, 622-Air outlet, 623-Wiring through hole, 63-Copper connecting piece, 64-Air pipe connector; 7-Limiting rod, 71-Limiting head, 72-Rotating sleeve, 73-Limiting groove, 74-Limiting block, 75-Connecting rod; 8-Feeding tube. Detailed Implementation

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application.

[0026] Example:

[0027] See Figure 1 and Figure 2The wire feeding mechanism for the gas shielded welding machine in this embodiment includes a housing 1 and a wire feeding wheel 2 and a pressure wheel assembly 3 disposed on the housing 1. The wire feeding wheel 2 is connected to the drive motor 5 via a reduction gear 4. The pressure wheel assembly 3 is used to press the welding wire onto the wire feeding wheel 2 for transmission when the wire feeding mechanism is working. On the housing 1, a wire inlet seat 11 and a wire outlet seat 12 are respectively provided on both sides of the wire feeding wheel 2. A connector 6 is provided on the wire outlet seat 12. The connector 6 includes a wire feeding tube 61, a mounting head 62, and a copper connecting piece 63 and a gas pipe connector 64 disposed on the mounting head 62. The wire feeding tube 61 is installed inside the wire outlet seat 12. The mounting head 62 has a wire outlet hole 621, a gas outlet hole 622, and two wiring through holes 623. The wire outlet hole 621 is connected to the wire feeding tube 61, and the gas outlet hole 622 is connected to the gas pipe connector 64. When in use, connect the positive and negative terminals of the welding power source to the wiring through hole 623, connect the gas outlet pipe of the gas supply system to the gas pipe connector 64, and connect the control cable of the control system to the copper connecting piece.

[0028] See Figure 7 In this embodiment, the copper connecting piece 63 is disposed between the air pipe connector 64 and the mounting head 62, and the air pipe connector 64 and the mounting head 62 are fixed by a threaded connection. Therefore, the copper connecting piece 63 can be directly fixed to the mounting head 62 via the air pipe connector 64, making installation convenient. Furthermore, the close proximity of the air pipe connector 64 and the copper connecting piece 63 further reduces the overall size. To improve installation stability, an additional bolt can be added to fix the copper connecting piece 63 to the mounting head 62 together.

[0029] See Figure 3 , Figure 4 and Figure 8 In this embodiment, a set of limiting grooves 611 are provided at intervals on the outer circumferential surface of the wire feeding tube 61, and correspondingly, a set of limiting protrusions 14 are provided at intervals on the inner walls of the wire outlet seat 12 and the cover plate 13. The limiting protrusions 14 and the limiting grooves 611 cooperate to limit the connection of the connector 6, thereby improving the connection stability between the connector 6 and the housing 1. Furthermore, the wire feeding tube 61 is stepped, with its large end connected to the mounting head 62 and its small end facing the wire inlet seat 11. The wire feeding tube 61 and the mounting head 62 are integrally formed.

[0030] In this embodiment, the top of the wire feed seat 12 is provided with a cover plate 13; the cover plate 13 is fixedly connected to the wire feed seat 12, confining the wire feeding tube 61 within the cavity between the cover plate 13 and the wire feed seat 12. Through the cooperation between the cover plate 13 and the wire feed seat 12, the connector 6 is fixed to the housing 1, which is convenient and easy to implement.

[0031] See Figure 6In this embodiment, the reduction structure 4 is a multi-stage gear transmission structure and is installed inside the housing 1; the housing 1 consists of two half-shells connected by threads. By combining multiple gears, the total reduction ratio can be distributed to each stage to achieve a higher total reduction ratio, thereby enabling the wire feeding wheel 2 to rotate at a slower speed when the wire feeding mechanism is working, avoiding damage to the welding wire due to excessive speed.

[0032] See Figure 5 The pressure roller assembly 3 includes a detachably connected pressure roller 31 and pressure roller frame 32; the interior of the pressure roller frame 32 is divided into a limiting cavity 34 by a set of limiting strips 33; the pressure roller 31 is located within the limiting cavity 34. Therefore, pressure rollers 31 of different sizes can be replaced as needed to adapt to welding wires of different sizes and specifications, providing good versatility.

[0033] Furthermore, one end of the pressure roller frame 32 is rotatably connected to the housing 1, and the other end has a slot 35. The slot 35 cooperates with the limiting rod 7 to limit the pressure roller frame 32. The limiting rod 7 is rotatably connected to the wire feed seat 11. By cooperating with the slot 35 on the pressure roller frame 32, the limiting rod 7 effectively prevents the pressure roller 31 from disengaging from the pressure roller frame 32, thus improving the stability of the overall structure during operation. When it is necessary to replace the pressure roller 32, the limiting rod 7 is lifted to disengage from the slot 35, and then the pressure roller frame 32 is rotated outward to remove the pressure roller 31 from the limiting cavity 34 for replacement.

[0034] See Figure 9 In this embodiment, the limiting rod 7 includes a limiting head 71 and a rotating sleeve 72; the rotating sleeve 72 is rotatably connected to the wire feed seat 11, and a limiting groove 73 is formed in the rotating sleeve 72; a limiting block 74 is provided in the limiting groove 73; the limiting block 74 is connected to the limiting head 71 through a connecting rod 75. After the limiting rod 7 is divided into multiple parts, the installation is more convenient; moreover, there is a specific cooperation relationship between each part (the end of the pressure roller frame 32 is restricted between the limiting head 71 and the rotating sleeve 72, and the connecting rod 75 is embedded in the slot 35 for limiting), and the overall stability is high after assembly.

[0035] Furthermore, the wire feed seat 11 is provided with a rotating shaft 15; the rotating sleeve 72 is sleeved on the rotating shaft 15 and can rotate relative to the rotating shaft 15; the rotating shaft 15 is a hollow structure, and a wire feed tube 8 is provided inside it. The wire feed tube 8 is arranged correspondingly to the wire feeding wheel 2, which can play a role in transmitting the welding wire and is conducive to improving the overall wire feeding efficiency of the wire feeding mechanism.

[0036] Based on the disclosure of this application, those skilled in the art can add, reduce, or combine the disclosed technical features in the above general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model involved, to form other technical solutions within the protection scope of this application.

Claims

1. A wire feeding mechanism for a gas shielded welding machine, comprising a housing (1) and a wire feeding wheel (2) and a pressure wheel assembly (3) disposed on the housing (1); the wire feeding wheel (2) is connected to a drive motor (5) via a reduction gear (4); the pressure wheel assembly (3) is used to press the welding wire onto the wire feeding wheel (2) for transmission when the wire feeding mechanism is working; on the housing (1), a wire inlet seat (11) and a wire outlet seat (12) are respectively provided on both sides of the wire feeding wheel (2); characterized in that: The wire feed seat (12) is provided with a connector (6); the connector (6) includes a wire feeding tube (61), an installation head (62), and a copper connecting piece (63) and an air pipe connector (64) provided on the installation head (62); the wire feeding tube (61) is installed inside the wire feed seat (12); the installation head (62) is provided with a wire feed hole (621), an air outlet hole (622) and two wiring through holes (623); the wire feed hole (621) is connected to the wire feeding tube (61), and the air outlet hole (622) is connected to the air pipe connector (64).

2. The wire feeding mechanism for a gas-shielded welding machine according to claim 1, characterized in that: The copper connecting piece (63) is located between the air pipe connector (64) and the mounting head (62), and the air pipe connector (64) and the mounting head (62) are fixed by threaded connection.

3. The wire feeding mechanism for a gas-shielded welding machine according to claim 1, characterized in that: The top of the wire feed seat (12) is provided with a cover plate (13); the cover plate (13) is fixedly connected to the wire feed seat (12) to confine the wire feeding tube (61) in the cavity between the cover plate (13) and the wire feed seat (12).

4. The wire feeding mechanism for a gas-shielded welding machine according to claim 3, characterized in that: The outer circumferential surface of the wire feeding tube (61) is provided with a limiting groove (611), and correspondingly, the inner walls of the wire outlet seat (12) and the cover plate (13) are provided with limiting protrusions (14).

5. The wire feeding mechanism for a gas-shielded welding machine according to claim 4, characterized in that: The wire feeding tube (61) is stepped, with its large end connected to the mounting head (62) and its small end facing the wire feed seat (11).

6. The wire feeding mechanism for a gas-shielded welding machine according to claim 1, characterized in that: The deceleration structure (4) is a multi-stage gear transmission structure.

7. The wire feeding mechanism for a gas-shielded welding machine according to claim 1, characterized in that: The pressure roller assembly (3) includes a detachably connected pressure roller (31) and pressure roller frame (32); the interior of the pressure roller frame (32) is separated into a limiting cavity (34) by a set of limiting strips (33); the pressure roller (31) is located in the limiting cavity (34).

8. The wire feeding mechanism for a gas-shielded welding machine according to claim 7, characterized in that: One end of the pressure roller frame (32) is rotatably connected to the housing (1), and the other end is provided with a slot (35); the slot (35) cooperates with the limiting rod (7) to limit the pressure roller frame (32); the limiting rod (7) is rotatably connected to the wire feed seat (11).

9. The wire feeding mechanism for a gas-shielded welding machine according to claim 8, characterized in that: The limiting rod (7) includes a limiting head (71) and a rotating sleeve (72); the rotating sleeve (72) is rotatably connected to the wire feed seat (11), and a limiting groove is provided in the rotating sleeve (72); a limiting block (74) is provided in the limiting groove; the limiting block (74) is connected to the limiting head (71) through a connecting rod (75).

10. The wire feeding mechanism for a gas-shielded welding machine according to claim 9, characterized in that: The feed seat (11) is provided with a rotating shaft (15); the rotating sleeve (72) is sleeved on the outside of the rotating shaft (15) and can rotate relative to the rotating shaft (15); the rotating shaft (15) is a hollow structure and is provided with a feed tube (8) inside.

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