An extended welding torch cutting apparatus

Abstract

The present application relates to the technical field of welding and cutting equipment, in particular to a lengthened welding gun cutting equipment, which comprises a positioning unit and a control unit. The positioning unit can stably clamp the ear plate during cutting and accurately maintain the preset safety distance between the cutting gun and the base material, ensuring that the cutting gun can stably and accurately move and cut the ear plate along the preset cutting path, guaranteeing the accuracy of the cutting trajectory and the surface quality, effectively avoiding direct contact or damage to the base material surface, and ensuring the integrity of the base material surface. The control unit can accurately and automatically start and stop the cutting gun, avoiding invalid cutting or safety hazards caused by accidental touch or operation timing errors, improving the automation level and operation efficiency of the cutting operation, and ensuring the stability and reliability of the cutting process.

Description

Technical Field

[0001] This invention relates to the field of welding and cutting equipment technology, and in particular to an extended welding torch cutting device. Background Technology

[0002] To facilitate the hoisting, transportation, or on-site positioning of steel, ear plates must be pre-welded onto the steel as lifting points or positioning benchmarks to withstand dynamic loads during hoisting and positioning stresses during installation. After all installation procedures are completed, to ensure the appearance integrity of the equipment or structure and its subsequent safety, the ear plates must be removed using an extended welding torch cutting device.

[0003] However, traditional extended welding torch cutting equipment requires operators to manually operate the extended cutting torch when removing ear plates. When working at height, it is difficult for operators to maintain stable control of the cutting torch, easily leading to deviations from design requirements in the cutting path, resulting in excessive cutting allowance, increased workload in subsequent grinding processes, or damage to the base material due to excessive torch oscillation. Furthermore, operators rely on visual judgment and experience-based estimation, making precise control of the cutting torch's opening and closing difficult, resulting in significant errors between the cutting start and end points and wasting metal material. Summary of the Invention

[0004] Therefore, it is necessary to provide an extended welding torch cutting device to address the problems of cutting path deviation and large errors between the starting and ending points caused by operators holding the extended cutting torch when cutting with the existing extended welding torch.

[0005] The above objectives are achieved through the following technical solutions: An extended welding torch cutting device, comprising: The cutting unit includes a handheld lever and a cutting gun, the cutting gun being fixedly mounted on the front side of the handheld lever for cutting the ear plate.

[0006] A positioning unit is used to clamp the ear plate during the cutting process and maintain a preset distance between the cutting gun and the base material.

[0007] A control unit is configured to automatically turn on the cutting gun when it approaches the starting point of the cutting path and automatically turn off the cutting gun after the cutting path is completed.

[0008] Furthermore, the positioning unit includes an elastic clamp and multiple positioning wheels. The elastic clamp is connected to the front end of the hand handle, and one end of the clamp has an opening for the ear plate to enter its interior. The multiple positioning wheels are rotatably connected to the inner wall of the elastic clamp, and the axis of the positioning wheel has a preset angle with the axis of the elastic clamp.

[0009] The positioning wheel is used to guide the elastic clamping plate to move in a direction close to the base material until it fits against the base material after the elastic clamping plate clamps the ear plate; when the side wall of the elastic clamping plate is in complete contact with the base material, the cutting gun has the preset distance from the base material.

[0010] Furthermore, the positioning unit also includes multiple abutment wheels, which are rotatably connected to the elastic clamping plate. The abutment wheels are used to roll and contact the surface of the base material during the cutting process.

[0011] Furthermore, the positioning unit also includes multiple transmission wheels, which are rotatably connected to the inner wall of the elastic clamp, and the transmission wheels are used to guide the ear plate to move.

[0012] Furthermore, the control unit includes a first switch and a rotary switch, with the first switch fixedly disposed at the rear end of the handheld lever; the first switch and the rotary switch jointly control the on / off state of the air circuit of the cutting gun, and the air circuit of the cutting gun is connected only when both the first switch and the rotary switch are turned on.

[0013] Furthermore, the control unit also includes a fixed gear and a rotating rod. The fixed gear is fixedly connected to the elastic clamping plate and meshes with the rotary switch. The rotating rod is rotatably connected to the outer wall of the elastic clamping plate, and the ear plate entering the elastic clamping plate can push the rotating rod to rotate relative to the elastic clamping plate. The rotary switch is rotatably connected to the rotating rod, and when the rotating rod drives the rotary switch to rotate relative to the fixed gear to a set angle, the rotary switch automatically turns on or off.

[0014] Furthermore, a first elastic element is provided between the elastic clamp and the rotating rod, and the elastic force of the first elastic element always makes the rotating rod tend to drive the rotary switch to close.

[0015] Furthermore, a one-way wheel is rotatably mounted on the rotating rod, and the one-way wheel can abut against the surface of the ear plate; during the cutting process, the one-way wheel restricts the cutting gun from moving in the opposite direction to the cutting path.

[0016] Furthermore, the control unit also includes a locking structure for locking the rotating rod after cutting is completed.

[0017] Furthermore, one end of the rotating rod is provided with a pin hole penetrating both end faces; the locking structure includes a locking wheel, a locking pin, and a second elastic element; the locking wheel is rotatably connected to the elastic clamping plate, and the locking wheel can slide relative to the elastic clamping plate; the locking pin is fixedly connected to the locking wheel, and the locking pin can be inserted into the pin hole; the two ends of the second elastic element are respectively connected to the elastic clamping plate and the locking pin, and the elastic force of the second elastic element always makes the locking pin close to the pin hole.

[0018] The beneficial effects of this invention are: This invention provides an extended welding torch cutting device, comprising a positioning unit and a control unit. The positioning unit stably clamps the ear plate during cutting and, through its cooperation with the base material, precisely maintains a preset safe distance between the cutting torch and the base material. This ensures the cutting torch can move and cut the ear plate stably and accurately along a preset cutting path, guaranteeing the accuracy of the cutting trajectory and surface quality. It effectively prevents the cutting torch from directly contacting or damaging the base material surface, ensuring the integrity of the base material surface. The control unit enables precise automatic start and stop of the cutting torch, automatically turning it on when approaching the starting point of the cutting path and automatically turning it off after completing the cutting path. This avoids ineffective cutting or safety hazards caused by accidental activation or incorrect operating timing, improving the automation level and efficiency of the cutting operation, and ensuring the stability and reliability of the cutting process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an extended welding torch cutting device provided in an embodiment of the present invention; Figure 2 for Figure 1 The front view of the structure shown; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 A magnified view of a section at point B in the middle; Figure 5 for Figure 4 A magnified view of a section at point C; Figure 6 for Figure 4 A magnified view of a section at point D; Figure 7 This is a schematic diagram of the structure of the cutting gun, positioning unit, and control unit in an extended welding gun cutting device provided by an embodiment of the present invention; Figure 8 for Figure 7 A magnified view of a section at point E in the middle; Figure 9 A cross-sectional view of an elastic clamping plate in an extended welding torch cutting device provided in an embodiment of the present invention; Figure 10 for Figure 9 A magnified view of a section at point F in the middle; Figure 11 for Figure 9 A magnified view of a section at point G.

[0020] in: 110. Base material; 120. Ear plate; 210. Handheld lever; 211. First switch; 212. Pipe; 220. Cutting gun; 230. Rotating lever; 231. First tension spring; 232. One-way wheel; 240. Rotary switch; 310. Elastic clamping plate; 311. Connecting piece; 312. Positioning tension spring; 313. Guide plate; 320. Positioning wheel; 330. Abutting wheel; 340. Transmission wheel; 341. Third compression spring; 350. Fixed gear; 360. Locking wheel; 361. Locking pin; 362. Second compression spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] The following reference Figures 1 to 11 This invention describes an extended welding torch cutting device, which includes a cutting unit and a positioning unit.

[0025] Specifically, the cutting unit includes a handheld lever 210 and a cutting gun 220.

[0026] The handheld lever 210 is a rigid rod-shaped structure with a hand grip at its rear end, providing a stable mounting base for other components. The cutting torch 220 is an industrial-grade plasma or flame cutting torch, mounted on the front of the handheld lever 210, with a nozzle at its end for spraying flame. The output power and cutting capacity of the cutting torch 220 are matched to the material and thickness of the ear plate 120 to ensure precise cutting of the ear plate 120.

[0027] The handheld lever 210 is also equipped with a pipe 212 and a first switch 211. The pipe 212 is a high-pressure gas delivery pipe, one end of which is fixedly connected to the gas inlet of the cutting gun 220, and the other end extends to the rear end of the handheld lever 210, for supplying the high-pressure gas required for cutting to the cutting gun 220. The first switch 211 is a pneumatic switch or an electric switch, fixedly installed at the rear end of the handheld lever 210, and its operation button is located in the gripping area of ​​the handheld lever 210, for controlling the on / off of the high-pressure gas.

[0028] The positioning unit includes an elastic clamping plate 310, multiple positioning wheels 320, and multiple transmission wheels 340.

[0029] The elastic clamp 310 is made of elastic metal material and has a hollow structure. Its front end along its own axis is open, and its rear end is closed. The inner diameter of the elastic clamp 310 is adapted to the thickness of the ear plate 120 to be cut, so that the ear plate 120 can enter the interior of the elastic clamp 310 through the opening and be stably placed in the closed area of ​​the rear end of the elastic clamp 310 after cutting.

[0030] The cutting gun 220 is mounted on the side wall of the elastic clamp 310, and its nozzle is located in the middle area inside the elastic clamp 310. When the ear plate 120 enters the interior of the elastic clamp 310, the cutting gun 220 can directly cut the ear plate 120 located inside it.

[0031] The nozzle of the cutting torch 220 is located in the middle area inside the elastic clamp 310, and the nozzle spray direction is towards the side wall surface of the ear plate 120. The high-temperature slag and spatter generated during the cutting process are mainly sprayed towards the surface of the ear plate 120 along the cutting direction. Most of the slag is blocked by the ear plate 120 itself and adheres to its cutting surface or side wall surface, preventing it from spreading over a large area towards the inner wall of the elastic clamp 310.

[0032] The elastic clamp 310 is used to clamp the two end side walls of the ear plate 120, so that the ear plate 120 can be stably positioned in the middle of the elastic clamp 310, providing a precise cutting reference for the cutting gun 220, and ensuring the accuracy of the cutting path and the consistency of the cutting quality.

[0033] A connector 311 is provided at the rear end of the elastic clamp 310. The connector 311 is a cylindrical protrusion, one end of which is coaxially and fixedly connected to the rear end face of the elastic clamp 310, and the other end is rotatably connected to the front end of the hand handle 210. Two positioning tension springs 312 are also provided between the connector 311 and the hand handle 210. The two ends of each positioning tension spring 312 are fixedly connected to the side wall of the connector 311 and the front side wall of the hand handle 210, respectively, and the two positioning tension springs 312 are symmetrically distributed about the axis of the connector 311. The elastic force of the two positioning tension springs 312 always makes the hand handle 210 tend to move towards the axis of the elastic clamp 310, so as to ensure that the elastic clamp 310 can always remain coaxial with the hand handle 210 during operation.

[0034] Two guide plates 313 are fixedly provided at the opening of the elastic clamp 310, and the two guide plates 313 are symmetrically distributed about the axis of the elastic clamp 310. The guide slopes of the two guide plates 313 face the axis of the elastic clamp 310, and are used to guide the ear plate 120 from the opening of the elastic clamp 310 to the middle position inside it.

[0035] Multiple positioning wheels 320 and multiple transmission wheels 340 are all circular roller structures. The positioning wheels 320 are evenly distributed on the inner wall of the front half of the elastic clamping plate 310. Each positioning wheel 320 is rotatably connected to the inner wall of the elastic clamping plate 310, and the axis of each positioning wheel 320 has a preset angle with the axis of the elastic clamping plate 310. This angle guides the elastic clamping plate 310 towards and into contact with the surface of the base material 110 when it moves on the ear plate 120. Multiple transmission wheels 340 are evenly distributed on the inner wall of the rear half of the elastic clamping plate 310. Each transmission wheel 340 is rotatably connected to the inner wall of the elastic clamping plate 310, and the axis of each transmission wheel 340 is perpendicular to the axis of the elastic clamping plate 310. The transmission wheels 340 guide the ear plate 120 to move to the rear end region of the elastic clamping plate 310 when the ear plate 120 moves between the multiple transmission wheels 340. Meanwhile, the friction between the transmission wheel 340 and the ear plate 120 can limit the ear plate 120 from detaching from both sides of the elastic clamp 310, preventing the ear plate 120 from accidentally falling off and ensuring the safety of the operation process.

[0036] During use, the operator holds the rear end of the holding rod 210, aligns the ear plate 120 to be processed with the opening of the elastic clamp 310, and slowly inserts it into the elastic clamp 310. During this process, the guide plate 313 at the opening of the elastic clamp 310 guides the ear plate 120 to slide into the middle clamping position inside the elastic clamp 310.

[0037] As the ear plate 120 enters through the opening of the elastic clamping plate 310, the surface of the ear plate 120 first contacts the outer peripheral surfaces of the multiple positioning wheels 320. Since each positioning wheel 320 has a preset angle with the axis of the elastic clamping plate 310, when the ear plate 120 begins to move inward into the elastic clamping plate 310, the positioning wheels 320 apply a continuous thrust perpendicular to the axis of the positioning wheels 320 to the inner wall of the elastic clamping plate 310, causing the elastic clamping plate 310 to tend to move towards the base material 110. As the positioning wheels 320 continue to roll on the ear plate 120, the sidewalls of the elastic clamping plate 310 gradually approach and eventually achieve a tight fit with the surface of the base material 110. When the side wall of the elastic clamp 310 is in close contact with the surface of the base material 110, the nozzle of the cutting gun 220 maintains a preset safe distance from the surface of the base material 110, thereby preventing the cutting gun 220 from causing thermal or mechanical damage to the base material 110 during operation, and ensuring the integrity of the base material 110 and its subsequent performance.

[0038] Subsequently, the cutting torch 220 is activated and begins to spray flame or plasma beam, moving stably along the side wall surface of the ear plate 120 to cut it. Throughout the cutting operation, multiple positioning wheels 320 maintain continuous contact with the side wall surface of the ear plate 120 and roll synchronously, ensuring that the side wall of the elastic clamp 310 is always tightly attached to the surface of the base material 110. This ensures that the nozzle of the cutting torch 220 maintains a preset safe distance from the surface of the base material 110, effectively avoiding cutting path deviations caused by ear plate 120 offset or equipment vibration during the cutting process, and ensuring cutting accuracy and operational safety. When the ear plate 120 moves to contact the outer peripheral surface of the multiple transmission wheels 340, since the axis of the transmission wheel 340 is perpendicular to the axis of the elastic clamp 310, the transmission wheel 340 can precisely guide the movement direction of the ear plate 120 as it rolls along the surface of the ear plate 120. This ensures that the ear plate 120 can only move in a straight line along the axis of the elastic clamp 310, effectively preventing the ear plate 120 from coming off the sides of the elastic clamp 310. When the positioning wheel 320 and the transmission wheel 340 are simultaneously in contact with the surface of the ear plate 120, the inclined axis of the positioning wheel 320 and the vertical axis of the transmission wheel 340 form a fixed spatial geometric constraint, restricting the degree of freedom of movement of the ear plate 120. This restricts its movement to a straight line only towards the rear end of the elastic clamp 310, further ensuring that the cutting gun 220 can achieve stable cutting along the preset cutting path.

[0039] Furthermore, the preset angle between the axis of the positioning wheel 320 and the axis of the elastic clamping plate 310 is set to a small angle, ranging from 5° to 15°. Due to the small angle, the lateral force generated by the positioning wheel 320 when rolling on the surface of the ear plate 120 is relatively limited. Its main motion is still rolling along the axis of the elastic clamping plate 310, accompanied only by a very small amount of lateral sliding. The frictional resistance generated by this small amount of sliding is much smaller than the pushing force of the operator, and therefore will not cause substantial obstruction to the advancement of the equipment.

[0040] After the ear plate 120 completes cutting, the cutting gun 220 stops working. At this time, the ear plate 120 continues to move under the guidance of the transfer wheel 340, eventually entering and stopping in the rear end area of ​​the elastic clamp 310 for subsequent unified collection and processing. Before the cutting is completed, the operator continuously pushes the hand lever 210, causing the elastic clamp 310 to move forward relative to the ear plate 120. Due to the close contact and positive pressure between the transfer wheel 340 and the surface of the ear plate 120, there is static friction between the transfer wheel 340 and the ear plate 120. When the elastic clamp 310 moves forward, the transfer wheel 340 rolls on the surface of the ear plate 120, and the ear plate 120 has a backward relative motion tendency relative to the elastic clamp 310.

[0041] At the instant the ear plate 120 is cut, it separates from the base material 110. At this point, the ear plate 120 already possesses inertia for backward movement relative to the elastic clamp 310. Simultaneously, the operator continues to push the hand lever 210 forward, the elastic clamp 310 continues to move forward, and the transmission wheel 340 continues to roll on the surface of the ear plate 120. The friction between the transmission wheel 340 and the ear plate 120 continues to act on the ear plate 120, causing the ear plate 120 to continue moving backward relative to the elastic clamp 310.

[0042] Furthermore, a one-way wheel 232 mounted on the rotating rod 230 abuts against the surface of the ear plate 120. The one-way wheel 232 allows the ear plate 120 to move backward relative to the elastic clamp 310, but restricts its reverse movement. After the ear plate 120 is cut, the one-way wheel 232 not only does not hinder the backward movement of the ear plate 120, but also prevents the ear plate 120 from rebounding forward due to vibration or other reasons, ensuring that the ear plate 120 moves stably towards the rear end region of the elastic clamp 310.

[0043] The rear end of the elastic clamp 310 is a closed structure. When the ear plate 120 moves to the rear end region of the elastic clamp 310, the end of the ear plate 120 abuts against the inner wall of the rear end of the elastic clamp 310, thereby being confined within the rear end region and preventing it from coming off the rear end of the elastic clamp 310. At the same time, the friction between the transmission wheel 340 and the ear plate 120 can keep the ear plate 120 inside the elastic clamp 310, preventing the ear plate 120 from accidentally falling off from the front opening due to its own weight or vibration.

[0044] Furthermore, the positioning unit also includes multiple abutment wheels 330, which are rotatably connected to the inner wall edge of the elastic clamping plate 310 and are evenly distributed along the axial direction of the elastic clamping plate 310. The elastic clamping plate 310 abuts against the surface of the base material 110 through the multiple abutment wheels 330 on its inner wall. The abutment wheels 330 are used to prevent the rigid sidewall of the elastic clamping plate 310 from causing scratches or indentations to the surface of the base material 110 when it comes into contact with the base material 110, thereby ensuring the surface integrity of the base material 110.

[0045] Furthermore, in order to facilitate the operator to remove the elastic clamping plate 310 for secondary cutting if the ear plate 120 is not completely cut in a single cut, the transmission wheel 340 is configured to slide on the elastic clamping plate 310 along its own axis, and a third elastic element is provided between the side wall of the transmission wheel 340 and the inner wall of the elastic clamping plate 310. The third elastic element is specifically a third compression spring 341. The elastic force of the third compression spring 341 always keeps the transmission wheel 340 close to the side of the elastic clamping plate 310.

[0046] After the cutting gun 220 completes a single cutting operation, if the ear plate 120 is not completely detached from the base material 110, the operator can apply outward force to overcome the elastic force of the third compression spring 341, causing the transmission wheel 340 to slide relative to the elastic clamping plate 310, thereby causing the elastic clamping plate 310 and the surface of the ear plate 120 to undergo relative displacement, thus enabling the elastic clamping plate 310 to detach from the ear plate 120, and thus enabling a secondary cutting.

[0047] In one embodiment, in order to achieve precise control of the opening and closing of the cutting gun 220 and avoid invalid cutting or safety hazards caused by accidental touch or incorrect operation timing, the extended welding gun cutting device provided in this embodiment of the invention also includes a control unit.

[0048] Specifically, the control unit includes a rotating rod 230 and a rotary switch 240.

[0049] An installation plate extends from the side wall of the elastic clamp 310. An installation shaft is fixedly installed on the installation plate perpendicular to the axis of the elastic clamp 310. A fixing gear 350 is coaxially fixedly installed at one end of the installation shaft that extends out of the installation plate.

[0050] The rotating rod 230 is a rigid rod-shaped structure. Its front end is rotatably connected to the mounting shaft. The rotating rod 230 is fixedly connected to the cutting gun 220, and the extension direction of the rotating rod 230 is parallel to the extension direction of the cutting gun 220. The cutting gun 220 moves synchronously with the rotating rod 230. The rear end of the rotating rod 230 can penetrate into the interior of the elastic clamping plate 310. A first inclined plate and a second inclined plate are fixedly arranged sequentially at the rear end of the rotating rod 230. The first inclined plate extends away from the axis of the rotating rod 230, and the second inclined plate extends towards the axis of the rotating rod 230. The axis of the nozzle of the cutting gun 220 has a fixed perpendicularity with the axis of the rotating rod 230, and the nozzle is located on the second inclined plate near the first inclined plate. A first elastic element is provided between the rotating rod 230 and the mounting plate. The first elastic element is a first tension spring 231. The elastic force of the first tension spring 231 always keeps the rear end of the rotating rod 230 inside the elastic clamping plate 310.

[0051] The rotary switch 240 is a knob-type operating structure. The rotary switch 240 is rotatably connected to the rotating rod 230 and meshes with the fixed gear 350. The rotational movement of the rotating rod 230 can be converted into the rotational movement of the rotary switch 240. The first switch 211 and the rotary switch 240 jointly control the air passage of the cutting gun 220. The air passage of the cutting gun 220 is connected only when both the first switch 211 and the rotary switch 240 are open.

[0052] As the ear plate 120 moves within the elastic clamping plate 310, its end face first contacts the inclined surface of the first inclined plate. With the continued advancement of the ear plate 120, it exerts a thrust along the surface of the first inclined plate, causing the rotating rod 230 to overcome the elastic force of the first tension spring 231 and rotate around the mounting axis in a direction away from the elastic clamping plate 310. The rotational motion of the rotating rod 230 drives the cutting gun 220 to rotate synchronously, adjusting the cutting angle of the cutting gun 220 and ensuring that the nozzle of the cutting gun 220 is precisely aligned with the end area to be cut on the ear plate 120.

[0053] Simultaneously, the rotating rod 230 drives the rotary switch 240 to rotate. Since the rotary switch 240 is engaged with the fixed gear 350, it rotates smoothly along the tooth profile of the fixed gear 350. When the ear plate 120 is pushed forward to the point where it will contact the first and second inclined plates, the rotary switch 240 completes its opening action. At this time, the first switch 211 is in a pre-opened state, satisfying the dual control conditions for the air circuit connection of the cutting gun 220. The cutting gun 220 is then officially started and begins to spray flame or plasma beam. This achieves precise opening of the cutting gun 220, ensuring that the cutting operation only starts when the nozzle is aligned with the area to be cut, effectively avoiding ineffective cutting caused by premature opening, reducing metal material loss, and improving the safety and economy of the cutting operation.

[0054] After the first inclined plate and the second inclined plate form a stable contact with the side wall of the ear plate 120, the nozzle of the cutting gun 220 moves stably along the side wall surface of the ear plate 120 and cuts the ear plate 120.

[0055] After the connection between the first and second inclined plates disengages from the surface of the ear plate 120, the rotating rod 230 begins to rotate in the opposite direction to its initial position under the elastic force of the first tension spring 231. When the ear plate 120 has moved a certain distance relative to the second inclined plate, i.e., after the cutting gun 220 has completed cutting the ear plate 120, the reverse rotation of the rotating rod 230 synchronously drives the rotary switch 240 to rotate in the opposite direction relative to the fixed gear 350, completing the closing action and stopping the cutting gun 220 from working. This achieves precise control of the cutting gun 220's closure, reduces metal waste, and improves operational efficiency.

[0056] Furthermore, to prevent the cutting gun 220 from moving in the opposite direction relative to the ear plate 120 during the cutting process and causing the cutting path to deviate, a one-way wheel 232 is rotatably provided at the connection between the first inclined plate and the second inclined plate of the rotating rod 230. The rotating rod 230 moves unidirectionally along the surface of the ear plate 120 through the one-way wheel 232, thereby ensuring that the cutting gun 220 always moves stably along the preset cutting path during the cutting process and avoiding cutting deviation.

[0057] Furthermore, to prevent the device from being started or accidentally activated due to misoperation, the control unit also includes a locking structure.

[0058] Specifically, the locking structure includes a locking wheel 360, a locking pin 361, and a second elastic element.

[0059] The locking wheel 360 is rotatably connected to the outer edge of the elastic clamping plate 310 and can slide linearly relative to the elastic clamping plate 310 along a direction perpendicular to the axis of the elastic clamping plate 310. The front end of the rotating rod 230 is provided with pin holes penetrating both ends of the rod. The locking pin 361 is rotatably connected to the locking wheel 360, and the extension direction of the locking pin 361 is perpendicular to the axis of the elastic clamping plate 310. The locking pin 361 can move relative to the elastic clamping plate 310 along a direction perpendicular to the axis of the elastic clamping plate 310 under the drive of the locking wheel 360, and can insert into or disengage from the pin holes of the rotating rod 230. The second elastic element is a second compression spring 362, whose two ends are fixedly connected to the outer wall of the elastic clamping plate 310 and the end face of the locking pin 361, respectively. The elastic force of the second compression spring 362 always keeps the locking pin 361 close to the pin holes on the rotating rod 230.

[0060] When the rotating rod 230 is in the initial position, the locking pin 361 is fully inserted into the pin hole under the elastic force of the second compression spring 362. At this time, the locking wheel 360 is located at the edge of the elastic clamping plate 310.

[0061] As the elastic clamping plate 310 gradually approaches the surface of the base material 110, the surface of the base material 110 comes into contact with the outer peripheral surface of the locking wheel 360, applying a compressive force to the locking wheel 360, causing it to move inward into the elastic clamping plate 310. This, in turn, drives the locking pin 361 to overcome the elastic force of the second compression spring 362 and move away from the pin hole of the rotating rod 230, causing the locking pin 361 to disengage from the pin hole, releasing the mechanical constraint on the rotating rod 230, and allowing the rotating rod 230 to rotate around its mounting axis under the continuous push of the ear plate 120.

[0062] After the cutting operation is completed, the rotating rod 230 automatically returns to its initial position under the elastic force of the first tension spring 231. After the elastic clamping plate 310 detaches from the surface of the base material 110, the compressive force acting on the locking wheel 360 disappears, the elastic force of the second compression spring 362 is released, driving the locking pin 361 to re-engage into the pin hole of the rotating rod 230, and causing the locking wheel 360 to slide back to the edge of the elastic clamping plate 310, thereby locking the rotating rod 230 again and ensuring that the equipment is in a safe ready-to-trigger state.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An extended welding torch cutting device, characterized in that, include: A cutting unit, comprising a handheld lever and a cutting gun, wherein the cutting gun is fixedly mounted on the front side of the handheld lever and is used to cut the ear plate; A positioning unit is used to clamp the ear plate during the cutting process and maintain a preset distance between the cutting gun and the base material; A control unit is configured to automatically turn on the cutting gun when it approaches the starting point of the cutting path and automatically turn off the cutting gun after the cutting path is completed. The positioning unit includes an elastic clamp and multiple positioning wheels. The elastic clamp is connected to the front end of the hand handle, and one end of the clamp has an opening for the ear plate to enter its interior. The multiple positioning wheels are rotatably connected to the inner wall of the elastic clamp, and the axis of the positioning wheel has a preset angle with the axis of the elastic clamp. The positioning wheel is used to guide the elastic clamping plate to move in a direction close to the base material until it fits against the base material after the elastic clamping plate clamps the ear plate; when the side wall of the elastic clamping plate is in complete contact with the base material, the cutting gun and the base material have the preset distance; The control unit includes a first switch and a rotary switch. The first switch is fixedly disposed at the rear end of the hand handle. The first switch and the rotary switch jointly control the air circuit on / off state of the cutting gun. The air circuit of the cutting gun is connected only when both the first switch and the rotary switch are turned on. The control unit further includes a fixed gear and a rotating rod. The fixed gear is fixedly connected to the elastic clamping plate and meshes with the rotary switch. The rotating rod is rotatably connected to the outer wall of the elastic clamping plate, and the ear plate entering the elastic clamping plate can push the rotating rod to rotate relative to the elastic clamping plate. The rotary switch is rotatably connected to the rotating rod. When the rotating rod drives the rotary switch to rotate relative to the fixed gear to a set angle, the rotary switch automatically turns on or off. The rotating rod is fixedly connected to the cutting gun, and the extension direction of the rotating rod is parallel to the extension direction of the cutting gun. The cutting gun moves synchronously with the rotating rod. The nozzle of the cutting gun is located in the middle area inside the elastic clamp, and the spray direction of the nozzle is towards the side wall surface of the ear plate. The axis of the cutting gun nozzle has a fixed perpendicularity with the axis of the rotating rod.

2. The extended welding torch cutting equipment according to claim 1, characterized in that, The positioning unit also includes multiple abutment wheels, which are rotatably connected to the elastic clamping plate. The abutment wheels are used to roll and contact the surface of the base material during the cutting process.

3. The extended welding torch cutting equipment according to claim 1, characterized in that, The positioning unit also includes multiple transmission wheels, which are rotatably connected to the inner wall of the elastic clamp, and the transmission wheels are used to guide the ear plate to move.

4. The extended welding torch cutting equipment according to claim 1, characterized in that, A first elastic element is also provided between the elastic clamp and the rotating rod. The elastic force of the first elastic element always makes the rotating rod tend to drive the rotary switch to close.

5. The extended welding torch cutting equipment according to claim 1, characterized in that, A one-way wheel is rotatably mounted on the rotating rod, and the one-way wheel can abut against the surface of the ear plate; during the cutting process, the one-way wheel restricts the cutting gun from moving in the opposite direction to the cutting path.

6. The extended welding torch cutting equipment according to claim 1, characterized in that, The control unit also includes a locking structure for locking the rotating rod after cutting is completed.

7. The extended welding torch cutting device according to claim 6, characterized in that, One end of the rotating rod is provided with a pin hole that passes through both end faces; the locking structure includes a locking wheel, a locking pin, and a second elastic element; the locking wheel is rotatably connected to the elastic clamping plate, and the locking wheel can slide relative to the elastic clamping plate; The locking pin is fixedly connected to the locking wheel, and the locking pin can be inserted into the pin hole; the two ends of the second elastic member are respectively connected to the elastic clamp and the locking pin, and the elastic force of the second elastic member always makes the locking pin close to the pin hole.

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