Novel quick connector for welding machine

Abstract

The utility model discloses a novel welding machine quick-plug connector which is composed of a welding machine side connector and a welding gun side connector. The welding machine side connector comprises a core seat and a tensioning sleeve installed in the core seat, and the welding gun side connector comprises a plug core and a plug outer sleeve located outside the plug core. During use, the plug core of the welding gun side joint is inserted into the tensioning sleeve of the welding machine side joint, so that the front end of the tensioning sleeve shrinks towards the middle under the action of the core seat to tightly hold the plug core, good contact between the tensioning sleeve and the plug core is ensured, and the hook on the core seat is pushed into the L-shaped opening of the plug jacket and then is rotated and fastened, so that the plug core is tightly clamped. Therefore, the welding gun side connector and the welding machine side connector are in close contact and are not prone to loosening, the problems that an existing welding machine connector is prone to loosening, heating is increased due to virtual connection contact resistance, and the connector is burnt out are solved, and the welding gun side connector can be widely applied to various welding machines such as an electric spark surfacing repairing machine, an argon arc welding machine, a plasma welding machine and an electric welding machine.

Description

Technical Field

[0001] This utility model relates to a connector, specifically a novel quick-connect connector for welding machines. Background Technology

[0002] Welding machines are currently widely used in various fields, including aerospace, shipbuilding, automotive, petrochemical, and engineering machinery, as general-purpose equipment in industrial and civilian production. The working principle of a welding machine is primarily based on the conversion of electrical energy into heat energy. The high temperature of the electric arc melts the welding rod and the materials being welded, causing them to bond. Essentially, a welding machine is a special power supply step-down and rectification device that converts 220V or 380V electricity into low-voltage AC or DC power. During welding, the positive and negative outputs are short-circuited at the welding point to form an electric arc. The heat generated by the arc melts the welding rod or the metal itself, forming a weld pool and achieving welding.

[0003] Welding operations are mostly characterized by low voltage and high current, therefore, the contact strength and stability of the positive and negative output terminals (i.e., welding machine output connectors) of the welding machine are required to be relatively high. Loose or poorly connected connections will lead to increased contact resistance and overheating, resulting in decreased welding performance and, in severe cases, joint burnout. Currently, there are three main types of welding machine connectors commonly used in the welding machine market:

[0004] 1. Universal Quick Connector: This type of connector allows for quick plugging and unplugging. The plug has a protruding tip; during installation, simply insert it and rotate it slightly to the side until the protruding tip engages with the anti-reverse groove, securing it in place. It's easy to use. However, a drawback is that for welding machines that are frequently moved, the welding cable is relatively long. If a reverse rotational force is generated during movement, and this force is strong enough, the protruding tip can wobble out of the anti-reverse groove. This results in a loose contact between the plug and the welding machine. Under prolonged high-current operation, this can lead to excessive contact resistance and overheating, affecting welding operations.

[0005] 2. Plate-type connector: Both the welding side and the welding torch side of the plate-type connector are perforated metal plates. During use, the two metal plates are stacked together with bolts and tightened. The advantages of this connector are a secure bolt tightening and good electrical conductivity. The disadvantage is that due to the frequent movement of the welding machine, the welding torch cable also sways back and forth. Over time, this accumulated swaying weakens the bolt tightening force, causing the nut to loosen, resulting in a loose connection. This leads to excessive contact resistance and overheating, affecting the welding operation.

[0006] 3. Nut-locking type connector: The welding machine side of the nut-locking type connector features an insulated, protruding threaded post with a protective gas passage in the middle. The welding torch side contains the nut and welding torch cable. Simply tighten the nut onto the post during use; it's convenient and flexible. The disadvantage is that due to the frequent movement of the welding machine, the welding torch cable also sways back and forth. Over time, this accumulated movement can cause the nut to loosen, resulting in a loose connection, excessive contact resistance, and overheating, affecting welding operations.

[0007] Therefore, there is a need for a new type of connector that can solve the problems of loosening, increased contact resistance and heat generation due to poor connection, and burn-out of the connector. Utility Model Content

[0008] The purpose of this invention is to provide a novel quick-connect welding machine connector to solve the problems mentioned in the background section.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A novel welding machine quick-connect connector comprises a welding machine side connector and a welding torch side connector. The welding machine side connector includes a core seat and a tensioning sleeve installed inside the core seat. A push spring is installed between the core seat and the tensioning sleeve. The front end of the tensioning sleeve is tapered and divided into multiple segments. An outer insulating sleeve is installed on the outside of the core seat. A large locking nut is provided at the rear end of the core seat. A hook is also installed at the front top of the core seat. The welding torch side connector includes a plug core and a plug outer sleeve located outside the plug core. A compression spring is provided between the plug core and the plug outer sleeve. The spring force of the push spring is less than that of the compression spring. A rear protective sleeve is installed on the outside of the plug outer sleeve. The outer front end of the plug outer sleeve has L-shaped openings in the front, rear, and lateral directions. The lateral opening is narrower at the front and wider at the back. Gas passages are provided inside both the tensioning sleeve and the plug core.

[0011] Furthermore, the front end of the core seat is hexagonal, and the front end of the core seat is embedded in the outer insulating sleeve, and the front end of the inner hole of the core seat is a circumferential conical surface.

[0012] Furthermore, an inner insulating sleeve is also installed on the rear side of the outer insulating sleeve. The inner insulating sleeve and the outer insulating sleeve clamp the sheet metal of the housing from front to back and are embedded in the hole of the sheet metal of the housing.

[0013] Furthermore, a nut is installed at the rear end of the tensioning sleeve.

[0014] Furthermore, a wire clamp is provided at the tail end of the plug core.

[0015] Furthermore, the plug sleeve is embedded within the rear sheath.

[0016] Furthermore, the front end of the tensioning sleeve is divided into 6 segments.

[0017] Furthermore, the rear end of the core seat is provided with a waist-shaped hole, and the tail end of the tensioning sleeve is provided with a milled flat portion.

[0018] Furthermore, the plug core has a recessed groove on its exterior.

[0019] Furthermore, a sealing ring groove is provided at the front end of the plug core.

[0020] Compared with existing technologies, the beneficial effects of this utility model are:

[0021] This invention allows the plug core of the welding torch side connector to be inserted into the tensioning sleeve of the welding machine side connector. The front end of the tensioning sleeve is contracted towards the center by the conical surface of the core seat to tightly hold the plug core, ensuring good contact between the tensioning sleeve and the plug core. Then, the hook on the core seat is pushed into the L-shaped opening of the plug sleeve and rotated to fasten it, thereby making the welding torch side connector and the welding machine side connector in tight contact and not easy to loosen. This solves the current problems of easy loosening of connectors, poor contact resistance, increased heat generation, and connector burn-out. It can be widely used in various welding machines such as EDM repair machines, TIG welding machines, plasma welding machines, and electric welding machines. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is the front view of the present invention;

[0024] Figure 3 for Figure 2 AA section view in the middle;

[0025] Figure 4 This is a rear view of the present invention;

[0026] Figure 5 for Figure 4 BB section view;

[0027] Figure 6 This is a schematic diagram of the welding machine side connector in this utility model;

[0028] Figure 7 This is a schematic diagram of the welding gun side connector in this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the core seat of this utility model;

[0030] Figure 9 This is a schematic diagram of the tensioning sleeve in this utility model;

[0031] Figure 10This is a schematic diagram of the plug core in this utility model;

[0032] Figure 11 This is a schematic diagram of the plug jacket structure in this utility model;

[0033] 101-Welding machine side connector; 102-Welding gun side connector; 1-Core seat; 2-Tensioning sleeve; 3-Push spring; 4-Plug core; 5-Compression spring; 6-Plug outer sleeve; 7-Large locking nut; 8-Inner insulating sleeve; 9-Outer insulating sleeve; 10-Wire clamp; 11-Hook; 12-Rear sheath; 13-Sheet metal housing; 14-Nut; 15-Gas passage; 16-Oval hole; 17-Milled flat part; 18-Submerged groove; 19-Sealing ring groove; 20-L-shaped opening 20. Detailed Implementation

[0034] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0035] Please see Figure 1-11 A novel welding machine quick-connect connector comprises a welding machine side connector 101 and a welding torch side connector 102. The welding machine side connector 101 includes a core seat 1 and a tensioning sleeve 2 installed inside the core seat 1. A push spring 3 is installed between the core seat 1 and the tensioning sleeve 2. An outer insulating sleeve 9 is installed on the outside of the core seat 1. A large locking nut 7 is provided at the rear end of the core seat 1 to clamp and fix the inner insulating sleeve 8, the outer insulating sleeve 9, and the machine housing sheet metal 13. A hook 11 is also installed at the front top of the core seat 1. The welding torch side connector 102 includes a plug core 4 and a plug outer sleeve 6 located outside the plug core 4. A compression spring 5 is provided between the plug core 4 and the plug outer sleeve 6. A rear protective sleeve 12 is installed on the outside of the plug outer sleeve 6.

[0036] The front end of the core seat 1 is hexagonal and is embedded in the outer insulating sleeve 9. The front end of the inner hole of the core seat 1 is a circumferential conical surface. An inner insulating sleeve 8 is also installed on the rear side of the outer insulating sleeve 9. The inner insulating sleeve 8 and the outer insulating sleeve 9 clamp the sheet metal housing 13 and are embedded in the hole of the sheet metal housing 13. A nut 14 is installed at the rear end of the tensioning sleeve 2 for locking the cable terminal. The rear end of the core seat 1 is provided with a waist-shaped hole 16, and the tail end of the tensioning sleeve 2 is provided with a milled flat part 17. The waist-shaped hole 16 and the milled flat part 17 cooperate to ensure that the tensioning sleeve 2 can slide back and forth inside the core seat 1 while not rotating left and right. The front end of the tensioning sleeve 2 is tapered and divided into 6 segments. When the front end of the tensioning sleeve 2 is pushed, its tapered surface contracts towards the middle under the action of the core seat 1, gripping the plug core 4 and ensuring good contact between the tensioning sleeve 2 and the plug core 4, ensuring the conduction of current. Both the tensioning sleeve 2 and the plug core 4 are provided with gas passage holes 15 for gas conduction.

[0037] The plug core 4 has a wire clamp 10 at its tail for clamping the welding gun cable. The plug sleeve 6 is embedded in the rear sheath 12. The plug core 4 has a recessed groove 18 on its exterior for the pin inside the plug sleeve 6 to engage, constraining the relative sliding travel of the plug core 4 and the plug sleeve 6, while preventing relative rotational movement between them. The plug core 4 has a sealing ring groove 19 at its front end. The outer front end of the plug sleeve 6 has L-shaped openings 20 for front-to-back and lateral movement. The lateral opening is narrower at the front and wider at the back, ensuring that after the hook 11 is inserted and clamped, both front-to-back pushing force and lateral rotational force are required for it to disengage. The spring force of the push spring 3 is less than that of the compression spring 5, ensuring that after the welding gun side connector 102 is inserted into the welding machine side connector 101 and the hook 11 is pushed into the L-shaped opening 20 and clamped, the conical surface of the tensioning sleeve 2 is tightly fitted with the front conical surface of the core seat 1, generating a clamping force, thereby ensuring good contact between the tensioning sleeve 2 and the plug core 4.

[0038] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A new type of welding machine quick connector, consisting of a welding machine side connector (101) and a welding torch side connector (102); characterized in that, The welding machine side joint (101) comprises a core seat (1) and a tension sleeve (2) installed inside the core seat (1), a front pushing spring (3) is installed between the core seat (1) and the tension sleeve (2), the front end of the tension sleeve (2) is provided with a taper and is divided into multiple petals, an outer insulation sleeve (9) is installed outside the core seat (1), a large locking nut (7) is arranged at the rear end of the core seat (1), and a hook (11) is further installed at the front top end of the core seat (1); the welding gun side joint (102) comprises a plug core (4) and a plug outer sleeve (6) outside the plug core (4), a compression spring (5) is arranged between the plug core (4) and the plug outer sleeve (6), the elastic force of the front pushing spring (3) is smaller than the elastic force of the compression spring (5), a rear sheath (12) is installed outside the plug outer sleeve (6), a front-rear and transverse L-shaped opening (20) is arranged at the outer front end of the plug outer sleeve (6), the front end of the transverse opening is narrow and the rear end is wide, and gas through holes (15) are arranged in the interiors of the tension sleeve (2) and the plug core (4).

2. The new welder quick connector as claimed in claim 1, wherein, The front end of the core seat (1) is of an outer hexagonal type, and the front end of the core seat (1) is embeddedly installed in the outer insulation sleeve (9), and the front end of the inner hole of the core seat (1) is a circumferential taper.

3. The new welder quick connector as claimed in claim 1, wherein, The rear side of the outer insulation sleeve (9) is further provided with an inner insulation sleeve (8), the inner insulation sleeve (8) and the outer insulation sleeve (9) clamp the metal shell (13) and are embeddedly installed in the hole of the metal shell (13).

4. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The rear end of the tension sleeve (2) is provided with a nut (14).

5. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The tail of the plug core (4) is provided with a wire pressing clamp (10).

6. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The plug outer sleeve (6) is embeddedly installed in the rear sheath (12).

7. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The front end of the tension sleeve (2) is divided into six petals.

8. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The rear end of the core seat (1) is provided with a waist-shaped hole (16), and the tail of the tension sleeve (2) is provided with a milled flat portion (17).

9. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The exterior of the plug core (4) is provided with a groove (18).

10. The new type of welder quick connector according to any one of claims 1-3, characterized in that, The front end of the plug core (4) is provided with a sealing ring groove (19).

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