Pneumoelectric split type wire drawing gun

Abstract

The utility model discloses a pneumoelectric split type wire drawing gun, a mechanical gas valve is integrated on a welding gun, the gas valve can control the on-off of protective gas, and the gas valve is linked with a welding gun switch button. During welding, the switch button is pressed down, the gas valve is opened, and the protective gas is connected. When welding is stopped, the switch button is released, the gas valve is closed, and the protective gas is blocked. When applied to the scene that a welding gun is directly connected with a protective gas cylinder, the gas can be quickly and effectively controlled to be connected or disconnected, and compared with a welding gun without a gas valve, the protective gas can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wire drawing gun, in particular to a gas-electric split type wire drawing gun. BACKGROUND

[0002] The general wire drawing gun does not have a gas valve, and when applied to the scene of direct connection of the welding gun gas interface and the gas cylinder, cannot control the on-off of the gas in time, and can only close or open the shielding gas through the valve on the gas cylinder. When the welding operation is interrupted or stopped, the shielding gas cannot be closed in time, which will cause the waste of the gas. SUMMARY

[0003] In view of the problems in the prior art, the utility model provides a gas-electric split type wire drawing gun, a mechanical type gas valve is integrated on the welding gun, the gas valve can control the on-off of the shielding gas, and the gas valve is linked with the welding gun switch key. When welding, the switch key is pressed, the gas valve is opened, and the shielding gas is connected. When welding is stopped, the switch key is loosened, the gas valve is closed, and the shielding gas is blocked. It is convenient to operate and saves the shielding gas.

[0004] The technical scheme of the utility model is: a gas-electric split type wire drawing gun, comprising a main body and a switch assembly.

[0005] A gas passage is formed in the main body, a valve cavity is also formed in the main body, a gas valve structure is arranged in the valve cavity, the gas valve structure can be linked with the switch assembly, the switch assembly is pressed during welding, the gas valve is opened, and the gas passage is connected; when welding is stopped, the switch assembly is loosened, the gas valve is closed, and the gas passage is blocked.

[0006] Further, the valve cavity is a stepped through hole in the main body from top to bottom;

[0007] The gas valve structure comprises a cover, a gas valve spring and a valve rod; the outer diameter of the upper part of the valve rod is larger than the outer diameter of the lower part of the valve rod, and a recessed blind hole is formed in the center of the upper surface of the upper part of the valve rod; the outer diameter of the cover is equal to the outer diameter of the upper part of the valve rod, and a recessed blind hole is also formed in the center of the lower surface of the cover; the gas valve spring is arranged in the blind hole of the valve rod and the blind hole of the cover; sealing rings are arranged on the outer surface of the cover, the outer surface of the upper part of the valve rod and the outer surface of the lower part of the valve rod;

[0008] When the gas valve structure is arranged in the valve cavity, the cover can seal the upper opening of the valve cavity, and the valve rod is kept static and seals the gas passage under the elastic force of the gas valve spring and the limiting action of the stepped surface in the valve cavity;

[0009] When the switch assembly is pressed, the valve rod can be pushed to move upward to open the gas passage.

[0010] Further, the switch assembly comprises a positioning pin, a micro switch, a button and a switch spring.

[0011] The button is rotatably fixed to the handle shell through the positioning pin, the micro switch is fixed to the handle shell inside the button, the button has a blind hole, one end of the switch spring is installed in the blind hole and the other end abuts against a plane on the handle shell, the button has two bosses on two sides and the handle shell has two recesses corresponding to the bosses, the two bosses and the two recesses are matched to stop the button, the switch spring is in a compressed state whether the button is pressed or not, when the button is not pressed, the button keeps relative static with the handle shell under the spring force, at this time, the button and the micro switch contact have a certain gap and the button top plane and the valve rod end surface also have a certain gap, when the button is pressed, the button rotates a certain angle around the positioning pin, the valve rod abuts against the button top and moves a distance, the gas passage is opened, at the same time, the micro switch contact abuts against a boss on the button and moves a distance, the micro switch is triggered.

[0012] Further, the gas pipe connecting screw is provided with a screw through hole along the central axis direction, one end of the gas pipe connecting screw is provided with external threads and the other end is provided with a bamboo joint structure, the end with external threads is connected with the main body and the screw through hole is communicated with the gas passage, and the gas pipe is connected to the bamboo joint structure of the gas pipe connecting screw through a clamp.

[0013] The gas-electric split type wire drawing gun has the advantages that the mechanical gas valve is integrated on the welding gun, the gas valve can control the on-off of the protective gas, the gas valve is linked with the welding gun switch button, the switch button is pressed during welding, the gas valve is opened and the protective gas is connected, the switch button is released when welding is stopped, the gas valve is closed and the protective gas is blocked, the gas-electric split type wire drawing gun can quickly and effectively control the on-off of the gas when applied to the scene of direct connection of the welding gun and the protective gas cylinder, and compared with the welding gun without the gas valve, the protective gas can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an exploded view of the gas-electric split type wire drawing gun;

[0015] Figure 2 It is a connection diagram of the wire feeding mechanism assembly and other parts;

[0016] Figure 3 It is an exploded view of the gas valve structure;

[0017] Figure 4 It is a sectional view of the gas valve structure;

[0018] Figure 5 It is a schematic view of the switch button;

[0019] Figure 6 is a schematic diagram of the gas passage inside the main body;

[0020] Figure 7 is a schematic diagram of the gas passage closed;

[0021] Figure 8 is a schematic diagram of the gas passage opened;

[0022] Figure 9 is a schematic diagram of the gas pipe connecting screw;

[0023] Figure 10 is a sectional view of the gas pipe connecting screw. DETAILED DESCRIPTION

[0024] To make the technical features of the present application clear, the present application will be described in detail below with reference to the specific embodiments and the accompanying drawings.

[0025] As shown in Figures 1-8 , the gas-electric split type wire drawing gun comprises a gun neck 101 and a wire feeding mechanism 102 threadedly connected. The wire feeding mechanism 102 is installed in a handle shell 406. Wire disc covers 103 and 104 are installed on the handle shell 406 and fastened by screws, and the wire disc covers are used for installing welding wires. A navigation plug 105 is connected with a control line, and the other end of the control line is connected with a micro switch 403 and a wire feeding motor 208. The navigation plug 105 is connected with a welding machine. A quick plug 106 is connected with a solid core cable, and the other end of the cable is connected with a cold pressure terminal 207. The cold pressure terminal 207 is connected with the main body 1 through a gas pipe connecting screw 206. A gas connector 107 is connected with a gas pipe 204, and the other end of the gas pipe 204 is connected with the gas pipe connecting screw 206 of a copper alloy material through a clamp 205 as shown in Figure 9 , 10 , the gas pipe connecting screw 206 has a screw through hole 503 for transmitting protective gas, and the gas pipe connecting screw 206 is connected with the main body 1 through threads. A switch assembly 108 is installed and positioned on the handle shell 406. A guide rod 202 is threadedly connected to the main body 1. The welding wire passes through the through hole in the guide rod 202 to reach the wire feeding passage at the end of the gun neck, and is fed out by the wire feeding motor for welding.

[0026] As shown in Figure 5As shown, the handle shell 406 has a blind hole, and the positioning pin 404 is tightly fitted with the blind hole. The key 402 has a through hole, and the key is connected with the positioning pin through the hole, and the key can rotate around the positioning pin. The micro switch 403 has two holes, and the handle shell 406 has two protruding cylinders at the position, and the micro switch is positioned on the handle shell. The key has a blind hole, and one end of the switch spring 401 is installed in the blind hole, and the other end is abutted against a plane on the handle shell. The key has two bosses on both sides, and the handle shell has two recesses corresponding to the bosses, and the two are matched to stop the key from rotating continuously when the key is rotated to the position shown in the figure. Whether the key is pressed or not, the switch spring is in a compressed state. When the key is not pressed, it is relatively static with the handle shell under the elastic force of the switch spring, at this time, the key and the micro switch contact have a certain gap, and the top plane of the key and the end face of the valve rod also have a certain gap. When the key is pressed, the key is rotated by a certain angle around the positioning pin, the valve rod is abutted against the top of the key, and moves a distance, and the gas passage is opened. At the same time, the micro switch contact is abutted against a boss on the key, and moves a distance, and the micro switch is triggered.

[0027] As shown in Figure 3 , 4 , the main body and the cover 408 of copper alloy or aluminum alloy material, the valve spring 407, and the valve rod 405 form a gas valve structure, and the cover and the valve rod are provided with a sealing ring 411, as shown in Figure 6 , the protective gas is transported into the valve cavity through the gas passage, at this time, the valve spring is in a compressed state, the valve spring applies pressure to the valve rod, the gas passage is closed, and the valve rod and the main body form a sealed cavity, as shown in Figure 7 , the gas is sealed in the main body. Pressing the key 402, the valve rod moves, the valve spring continues to be compressed, the gas passage is opened, and the valve rod and the main body no longer form a sealed cavity, as shown in Figure 8 , the gas flows out, and at the same time, the micro switch is triggered, and the wire feeding mechanism 102 starts to transport the welding wire.

[0028] The above only describes preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A gas-electric split type wire drawing gun, characterized in that: The switch assembly (108) is arranged in the main body (1) and comprises a positioning pin (404), a micro switch (403), a button (402) and a switch spring (401). The main body (1) is provided with a gas passage (409) and a valve cavity (410), and the valve cavity (410) is provided with a gas valve structure. The valve cavity (410) is a stepped through hole in the main body (1) from top to bottom. The gas valve structure comprises a cover (408), a gas valve spring (407) and a valve rod (405), the outer diameter of the upper part of the valve rod is larger than that of the lower part, and a recessed blind hole is arranged in the center of the upper surface of the upper part; the outer diameter of the cover (408) is equal to that of the upper part of the valve rod, and a recessed blind hole is also arranged in the center of the lower surface of the cover; the gas valve spring (407) is arranged in the blind hole of the valve rod (405) and the blind hole of the cover respectively; the outer surfaces of the cover (408), the upper part of the valve rod and the lower part of the valve rod are all provided with sealing rings (411). When the gas valve structure is arranged in the valve cavity (410), the cover (408) can seal the upper opening of the valve cavity (410), and the valve rod (405) can remain static and seal the gas passage (409) under the elastic force of the gas valve spring (407) and the limiting action of the stepped surface in the valve cavity (410). When the button of the switch assembly is pressed, the valve rod (405) can be pushed to move upward to open the gas passage (409).

2. An electro-aerodynamic split-wire gun as claimed in claim 1, wherein: The switch assembly (108) comprises a positioning pin (404), a micro switch (403), a button (402) and a switch spring (401). The button (402) is rotatably fixed to the handle shell (406) through the positioning pin (404), the micro switch (403) is fixed to the handle shell (406) on the inner side of the button (402), the button (402) has a blind hole, one end of the switch spring (401) is arranged in the blind hole, and the other end is arranged at a plane on the handle shell; the button (402) has two bosses on both sides, and the handle shell has two recesses corresponding to the bosses, and the two bosses and the two recesses are matched to stop the button (402); no matter whether the button is pressed or not, the switch spring is in a compressed state; when the button is not pressed, the button remains relatively static under the elastic force of the spring; at this time, the button and the micro switch contact have a certain gap, and the top plane of the button and the end surface of the valve rod also have a certain gap; when the button is pressed, the button rotates around the positioning pin by a certain angle, the valve rod abuts against the top of the button and moves a distance, and the gas passage is opened; at the same time, the micro switch contact abuts against the boss on the button and moves a distance, and the micro switch is triggered.

3. The electro-aerodynamic split-wire wire drawing gun of claim 1, wherein: Also included is a trachea connecting screw (206) having a screw through hole (503) opened along the central axis direction, the trachea connecting screw (206) being provided with external threads (501) at one end and a bamboo joint structure (502) at the other end; the trachea connecting screw (206) is connected to the main body (1) at the end with external threads (501), and the screw through hole (503) is in communication with the gas passage (409); the trachea (204) is connected to the bamboo joint structure (502) of the trachea connecting screw (206) through a clamp (205).

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