A quick connector for welding machines

Abstract

This utility model discloses a quick connector for an electric welding machine, including a connector base, a plug-in base, and an electrode plug. The connector base includes a fixed base and a rotating sleeve base, with several locking protrusions inside the rotating sleeve base. The plug-in base has a fixing ring, a bearing, and a helical spring. One end of the electrode plug is rotatably mounted via the bearing, and its surface has multiple helical grooves and ring locking grooves. During insertion, the electrode plug deflects into place under the guidance of the grooves and returns to its original position under the torsion of the spring, completing the misalignment of the locking protrusions and the locking grooves. By controlling the deflection of the rotating sleeve base with a crank, the grooves and locking protrusions slide out to achieve quick unlocking. This structure realizes automatic guided insertion, elastic reset locking, and friction damping anti-rotation functions, improving the connection stability and ease of operation of the welding joint.

Description

Technical Field

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

[0002] Electric welding equipment is widely used in metal structure manufacturing, maintenance, and heavy industry. The electrical connection between the welding torch and the welding machine is usually achieved through quick couplings. Existing quick couplings for welding machines generally adopt threaded fastening or plug-in structures, ensuring conductivity while achieving convenient and reliable connection.

[0003] Currently, a common type of connector is to insert the plug into the socket and use the built-in spring or spring structure to complete the limit locking. However, this type of structure has the following typical problems: (1) The insertion process lacks effective guidance, which can easily lead to misalignment or jamming, resulting in poor connection; (2) The locking structure is simple, and some connectors rely on elastic hooks or ball structures to complete the positioning. They are easily worn or fail due to frequent insertion and removal, resulting in loose connectors; (3) There is a lack of anti-rotation damping mechanism. The connector may rotate and loosen during vibration or transportation, which may lead to poor electrical connection or detachment; (4) The structure has poor versatility and is not suitable for scenarios where cable harnesses transmit torque.

[0004] Existing quick-connect welding connectors use a spring-loaded locking mechanism with pin-based positioning. While this improves the ease of connection to some extent, it still requires precise manual alignment in actual operation and suffers from unstable locking in vibrating environments.

[0005] In summary, existing quick connectors for welding machines still have significant shortcomings in terms of structural compactness, automatic guiding capability, locking reliability, and anti-rotation protection. There is an urgent need for a new quick connector structure with automatic deflection guidance, elastic locking return, and friction damping anti-rotation functions to improve connection efficiency, safety, and service life in welding operations. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a quick connector for an electric welding machine, including a connector seat, a plug seat, and an electrode plug. The connector seat includes a fixed seat and a rotating sleeve seat rotatably fitted inside the fixed seat. The inner side of the rotating sleeve seat has a sleeve hole adapted to the diameter of the electrode plug. The inner side of the sleeve hole has several locking protrusions. The outer surface of the rotating sleeve seat is provided with a crank rod and a sliding pin. A fixing ring is fixedly installed on one side of the plug seat. A helical spring located inside the plug seat is provided on the surface of the fixing ring. A bearing is fitted inside the fixing ring. One end of the electrode plug is rotatably installed on the fixing ring through the bearing. One end of the electrode plug is connected to the end of the helical spring. The surface of the electrode plug is provided with a ring locking groove and multiple sliding grooves arranged spirally in the circumferential direction. One end of the sliding groove is connected to the ring locking groove.

[0008] In a preferred embodiment, the slide is further configured such that it has a spiral guiding structure, which automatically deflects and guides the electrode plug during insertion. After reaching a preset angle, it is reset by a spring to achieve return and locking, thus having both automatic insertion and mechanical locking functions. Specifically, this significantly improves insertion efficiency, avoids misaligned insertion, and enhances connection stability.

[0009] In a preferred embodiment, the connector is further configured such that one end is connected to a cable harness, and the end of the cable harness is electrically connected to the electrode plug. Both the adapter and the electrode plug are made of metal. Specifically, this configuration ensures good current conduction and is suitable for high-current connections between welding machines and welding torches.

[0010] In a preferred embodiment, the connector seat is further configured such that its outer surface has a groove hole for guiding the sliding pin and crank rod to slide; the rotating sleeve seat and the fixed seat are arranged coaxially; and the crank rod is fixedly installed on the outer periphery of the rotating sleeve seat. Specifically, this structure allows the rotating sleeve seat to deflect by manually rotating the crank rod, thereby unlocking the structure and releasing the electrode plug, improving disassembly convenience and control precision.

[0011] In a preferred embodiment, the helical spring is further configured such that it is a planar helix, with both ends connected to the electrode plug and the surface of the retaining ring, respectively. Specifically, this configuration provides stable torsional elasticity during insertion and allows for rapid elastic return to its original position after insertion, achieving automatic locking and improving operational efficiency.

[0012] In a preferred embodiment, the locking protrusion is further configured such that its width matches the sliding groove and the ring locking groove, and multiple sliding grooves are evenly distributed along the circumference of the electrode plug. Specifically, this can form a multi-point balanced locking mechanism, improving the structural fit accuracy and anti-loosening performance.

[0013] In a preferred embodiment, the number of both the sliding groove and the locking protrusion is three sets, and the helix angle of the sliding groove is less than or equal to 60 degrees. Specifically, the three-point evenly distributed structure can balance structural compactness and smooth insertion, thereby improving the stability of the connection.

[0014] In a preferred embodiment, the spiral spring is further configured such that, in its initial state, the end of the slide groove furthest from the locking groove is positioned opposite the locking protrusion, while the other end of the slide groove is offset from the locking protrusion. Specifically, during the insertion process, the slide groove can be first guided into the guide area, and after rotation locking, it can be moved into the locking groove area to ensure the sequentiality and reliability of the locking process.

[0015] In summary, this utility model achieves automatic deflection guidance and elastic reset locking during the insertion process through structural innovation. At the same time, the addition of a damping cooperation structure at the end of the connector effectively improves the safety and reliability of the connector under complex working conditions, making it suitable for welding operation scenarios that require frequent disassembly or rapid replacement.

[0016] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, the electrode plug cooperates with the locking protrusion inside the connector seat through the spiral groove, and combined with the restoring force generated by the elastic element, it realizes automatic guided insertion and misalignment locking, which significantly improves the fast insertion and removal efficiency and structural stability of the welding joint, and avoids the problem of loose or accidental disconnection of traditional plug connections.

[0017] 2. In this utility model, the locking state is controlled by the linkage between the rotating sleeve and the crank rod, so that the plug can be accurately unlocked when needed. In the non-operational state, the rotational damping is formed by frictional contact, which effectively prevents deflection and slippage during the plugging process, improves the safety and reliability during use, and is suitable for high-frequency plugging and unplugging occasions between electric welding machines and welding guns. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is an exploded structural diagram of a connector seat according to an embodiment of the present invention; Figure 3 This is an exploded view of the socket and electrode plug according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the engagement state of the rotating socket and the electrode plug according to an embodiment of the present invention.

[0019] Figure label: 100. Connector seat; 110. Fixed seat; 120. Rotary sleeve seat; 130. Locking protrusion; 121. Crank rod; 122. Sliding pin; 200. Socket; 210. Retaining ring; 220. Helical spring; 211. Bearing; 300. Electrode plug; 310. Slide groove; 320. Ring lock groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0021] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0022] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a quick connector for an electric welding machine.

[0023] Combination Figures 1-4 As shown, this utility model provides a quick connector for an electric welding machine, including a connector base 100, a plug-in base 200, and an electrode plug 300. The connector base 100 includes a fixed base 110 and a rotating sleeve base 120 rotatably sleeved inside the fixed base 110. The inner side of the rotating sleeve base 120 has a sleeve hole adapted to the outer diameter of the electrode plug 300, and several locking protrusions 130 are fixedly installed inside the sleeve hole. A crank rod 121 and a sliding pin 122 are fixedly installed on the outer surface of the rotating sleeve base 120, which are used to control the deflection angle of the rotating sleeve base 120 in actual operation to achieve plugging and unplugging control.

[0024] A retaining ring 210 is fixedly installed on one side of the connector 200. A bearing 211 is provided on the inner side of the retaining ring 210. The bearing 211 cooperates with one end of the electrode plug 300, allowing the electrode plug 300 to be rotatably installed relative to the connector 200. A helical spring 220 is also fixedly installed on the inner surface of the retaining ring 210. One end of the helical spring 220 is connected to the retaining ring 210, and the other end is connected to the plug end of the electrode plug 300.

[0025] The outer peripheral surface of the electrode plug 300 is provided with multiple sliding grooves 310 and ring locking grooves 320. The multiple sliding grooves 310 are arranged in a spiral shape and evenly distributed along the circumference of the electrode plug 300, with one end of the sliding groove 310 communicating with the ring locking groove 320. This structure is used to guide the electrode plug 300 to deflect during insertion, so that the locking protrusion 130 is guided in along the sliding groove 310. When the electrode plug 300 is inserted to a preset depth, it automatically returns to its original position under the elastic torsion of the helical spring 220, thereby realizing that the locking protrusion 130 enters the ring locking groove 320 to form a misaligned engagement, completing the stable locking of the electrical connection.

[0026] In this embodiment, one end of the plug-in 200 is connected to a cable harness (not shown), and the wire ends of the cable harness are electrically connected to the electrode plug 300 to realize the transmission of welding current. Both the adapter 120 and the electrode plug 300 are conductive metal components to ensure the conductivity between the welding machine and the welding clamp in the connected state.

[0027] Furthermore, to facilitate the operation guidance of the sliding pin 122 and the crank rod 121, the outer surface of the connector seat 100 is provided with a sliding groove (unlabeled) for guiding sliding. The sliding groove cooperates with the movement path of the crank rod 121, so that the rotating sleeve seat 120 can achieve coaxial rotation while being fixed to the fixed seat 110. The crank rod 121 is installed on the outer periphery of the rotating sleeve seat 120 for manual rotation and adjustment by the operator.

[0028] In a preferred configuration, the helical spring 220 is a planar helix, with its two ends fixedly connected to the opposing surfaces of the electrode plug 300 and the retaining ring 210, respectively. This spring structure can generate torsional elastic force during the insertion process and can achieve a return action after the insertion is completed, assisting the electrode plug 300 to enter the locking state.

[0029] Preferably, the width of the locking protrusion 130 is adapted to the widths of the sliding groove 310 and the ring locking groove 320, so that the locking structure has good fit stability. The sliding groove 310 is distributed in three groups at equal intervals in the circumferential direction of the electrode plug 300, which can achieve multi-point balanced locking while keeping the structural space compact, thereby enhancing the locking strength and vibration resistance.

[0030] In a typical configuration, there are three sets of slide grooves 310 and locking protrusions 130. The spiral angle of slide groove 310 is designed to be less than or equal to 60 degrees. This angle design is beneficial for guiding the insertion path and also facilitates efficient locking during the return phase.

[0031] Furthermore, before insertion, the helical spring 220 is in its initial released state, at which point the end of the slide groove 310 away from the ring locking groove 320 is positioned opposite to the locking protrusion 130. When the insertion operation begins, the electrode plug 300 deflects along the slide groove 310 during insertion. After entering the locking groove area, it rotates back to its original position under the action of elastic force, causing the locking protrusion 130 to embed into the ring locking groove 320 to complete the locking and achieve a secure connection.

[0032] When it is necessary to disconnect, the operator can rotate the crank 121 to cause the rotating sleeve 120 to deflect, driving the locking protrusion 130 to slide forward along the slide groove 310 and disengage from the ring lock groove 320, thus achieving rapid separation between the electrode plug 300 and the connector seat 100, thereby completing the unlocking process.

[0033] As can be seen from the above embodiments, the structural design of this utility model realizes the organic integration of automatic guidance, return locking, friction limiting and manual unlocking functions in the insertion process, which effectively improves the safety, stability and operation efficiency of the welding head, and is suitable for high-frequency and fast connection occasions between various welding machines and welding clamps. Working principle and usage process of this utility model: The quick connector for welding machines of this utility model mainly consists of a connector base 100, a plug base 200, and an electrode plug 300. Through a sleeve, locking, and elastic fit structure, it achieves quick plug-in connection and stable electrical contact.

[0034] During use, the operator holds one end of the connector 200 and aligns the electrode plug 300 axially with the surfaces of the fixed seat 110 and the rotating sleeve seat 120 in the connector 100. During insertion, the front end of the spiral groove 310 on the outer periphery of the electrode plug 300 is guided into insertion relative to the locking protrusion 130 on the inner side of the rotating sleeve seat 120. Under the action of the insertion force, the groove 310 guides the locking protrusion 130 to undergo relative deflection, thus ensuring directional guidance of the electrode plug 300 during insertion.

[0035] As the insertion depth increases, the helical spring 220 undergoes torsional deformation and accumulates elastic potential energy during the insertion process. When the locking protrusion 130 disengages from the front end of the slide groove 310 and enters the annular locking groove 320 on the outer periphery of the electrode plug 300, the restoring force generated by the helical spring 220 drives the electrode plug 300 to rotate, causing the annular locking groove 320 to be misaligned with the locking protrusion 130, ultimately achieving mechanical locking of the locking protrusion 130 embedded in the inner side of the annular locking groove 320.

[0036] Meanwhile, one end of the fixing ring 210 abuts against the outer wall of the fixed seat 110 to form a friction contact interface, which provides structural damping, thereby effectively preventing the plug seat 200 from spinning due to vibration or misoperation, causing the electrode plug 300 to accidentally detach, and ensuring connection stability and safety.

[0037] When disassembly is required, the crank 121 can be manually rotated to drive the rotating sleeve 120 to deflect around the central axis. After the rotation reaches the predetermined angle, the locking protrusion 130 re-aligns with the inner end of the slide groove 310. By continuing to rotate the rotating sleeve 120, the locking protrusion 130 slides along the slide groove 310, thereby pushing the electrode plug 300 to axially retract, realizing the quick unlocking and disengagement of the connector seat 100 and the electrode plug 300.

[0038] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A quick connector for an electric welding machine, characterized in that, include: The connector (100), plug-in socket (200), and electrode plug (300) are provided. The connector (100) includes a fixed seat (110) and a rotating sleeve (120) rotatably fitted inside the fixed seat (110). The inner side of the rotating sleeve (120) is provided with a sleeve hole that matches the diameter of the electrode plug (300), and a plurality of locking protrusions (130) are fixedly installed inside the sleeve hole. A crank rod (121) and a sliding pin (122) are fixedly installed on the surface of the rotating sleeve (120). A retaining ring (210) is fixedly installed on one side of the plug-in socket (200). A helical spring (220) is fixedly installed on the surface of the plug (200) inside the plug-in base (200). A bearing (211) is sleeved on the inner side of the fixing ring (210). One end of the electrode plug (300) is rotatably installed on the surface of the fixing ring (210) through the bearing (211), and one end of the electrode plug (300) is connected to the end of the helical spring (220). A ring locking groove (320) and several sliding grooves (310) are opened on the surface of the electrode plug (300). Each of the sliding grooves (310) is arranged in a spiral shape and one end is connected to the ring locking groove (320).

2. The quick connector for an electric welding machine according to claim 1, characterized in that, One end of the plug-in (200) is connected to a cable harness, and the end of the cable harness is electrically connected to the end of the electrode plug (300). The swivel socket (120) and the electrode plug (300) are both metal components used to realize the electrical connection between the welding machine and the welding clamp in the engaged state.

3. A quick connector for an electric welding machine according to claim 1, characterized in that, The surface of the connector seat (100) is provided with a sliding groove hole for guiding the sliding pin (122) and the crank rod (121) to slide. The rotating sleeve seat (120) is arranged coaxially with the fixed seat (110), and the crank rod (121) is fixed to the outer periphery of the rotating sleeve seat (120).

4. A quick connector for an electric welding machine according to claim 1, characterized in that, The helical spring (220) is planar helical, and its two ends are fixedly connected to the surface of the electrode plug (300) and the fixing ring (210), respectively.

5. A quick connector for an electric welding machine according to claim 1, characterized in that, The width of the locking protrusion (130) is adapted to the width of the sliding groove (310) and the ring locking groove (320), and a plurality of the sliding grooves (310) are evenly distributed in the circumferential direction on the surface of the electrode plug (300).

6. A quick connector for an electric welding machine according to claim 1, characterized in that, The number of the slide groove (310) and the locking protrusion (130) are both three sets, and the helical angle of the slide groove (310) is less than or equal to 60 degrees.

7. A quick connector for an electric welding machine according to claim 1, characterized in that, In the initial state of the helical spring (220), the end of the slide groove (310) away from the ring lock groove (320) is arranged opposite to the locking protrusion (130), and the other end of the slide groove (310) is offset from the locking protrusion (130).

Images