Electric transport vehicle frame welding device

Abstract

The present invention relates to the technical field of electric transport vehicle processing, and discloses an electric transport vehicle frame welding device, including a manipulator, a base and a welding gun, wherein the welding gun is installed at the mobile end of the manipulator, a reduction motor and a swivel seat are installed on the base, the output shaft of the reduction motor is connected to the swivel seat, the manipulator is installed on the swivel seat, a conveying crawler for transporting the electric transport vehicle frame is arranged on the front side of the base, a support frame is installed on the side of the base, a mobile frame is slidably installed on the support frame, a welding frame for placing the frame is installed in the middle of the mobile frame, and a flip motor for driving the welding frame to rotate is installed on the side of the mobile frame; after the swivel seat rotates, the welding gun is away from the welding frame, and the flip motor drives the welding frame to flip. This solution automates welding and loading and unloading, reduces labor costs, improves welding efficiency, and avoids the problem of safety hazards caused by manual material connection.

Description

Technical Field

[0001] The invention relates to the technical field of electric transport vehicle processing, in particular to a frame welding device for an electric transport vehicle. Background Art

[0002] Electric transport trucks are mainly used for indoor and outdoor material handling and transportation, and are widely used in logistics, warehouses, shopping malls, workshops, schools, airports and other places. Its structure usually includes multiple parts such as cargo loading and unloading and stacking, cargo sorting, loading and unloading transportation, etc., which can meet the transportation needs in different scenarios. The frame is a key component of the electric transport truck, and its welding quality directly affects the performance and service life of the whole vehicle.

[0003] When welding, large electric transport trucks are usually placed on a welding frame, fixed by snapping, and then a robotic arm is used with a welding gun for automated welding. After welding one side of the frame, the welding frame is flipped over to turn the electric transport truck frame over, so that welding can continue on the other side. After welding, manual unloading is generally required. When the frame is large, it may be necessary to unload the material with a hook, resulting in a long overall welding time and insufficient efficiency. This not only increases labor costs, but may also cause damage to the frame or personal injury due to improper operation; therefore, it does not meet existing needs, and we have proposed an electric transport truck frame welding device. Summary of the invention

[0004] The present invention provides an electric transport vehicle frame welding device, which has the beneficial effects of automatic loading and unloading on the basis of automated welding, reducing labor costs and improving the overall welding efficiency. It solves the problem mentioned in the above background technology that after welding is completed, manual unloading is generally required. When the frame is large, it may be necessary to cooperate with hooks for unloading, resulting in a long overall welding time and insufficient efficiency. This not only increases labor costs, but may also cause damage to the frame or personal injury due to improper operation.

[0005] The present invention provides the following technical solutions: an electric transport vehicle frame welding device, comprising a manipulator, a base and a welding gun, wherein the welding gun is mounted on the mobile end of the manipulator, a reduction motor and a swivel seat are mounted on the base, the output shaft of the reduction motor is connected to the swivel seat, the manipulator is mounted on the swivel seat, a conveying crawler for transporting the electric transport vehicle frame is arranged on the front side of the base, a supporting frame is mounted on the side of the base, a moving frame is slidably mounted on the supporting frame, a welding frame for placing the frame is mounted in the middle of the moving frame, and a flip motor for driving the welding frame to rotate is mounted on the side of the moving frame;

[0006] After the rotating seat rotates, the welding gun is away from the welding frame, and the turning motor drives the welding frame to turn over.

[0007] As an optional solution for the electric transport vehicle frame welding device described in the present invention, the support frame is provided with a lifting slide groove, the lifting slide groove is set as a vertical groove, the movable frame is slidably engaged with the lifting slide groove, the support frame is installed with a cylinder, and the telescopic end of the cylinder is connected to the movable frame.

[0008] As an optional solution for the electric transport vehicle frame welding device described in the present invention, the welding frame is rotatably installed in the middle of the mobile frame, a vertical plate is installed on one side of the mobile frame, the flip motor is installed on one side of the vertical plate, a worm is rotatably installed on the other side of the vertical plate, the output shaft of the flip motor is connected to the worm, a worm wheel is rotatably installed on the side of the mobile frame, the worm is meshed with the worm wheel, and the rotating shaft of the welding frame is coaxially connected to the worm wheel.

[0009] As an optional solution for the electric transport vehicle frame welding device described in the present invention, the side of the welding frame is provided with a contour groove, the inner wall of the contour groove is symmetrically provided with a clamping plate, the clamping plate is provided as a smooth flat plate with a rounded edge on one side, a clamping spring is installed between the clamping plate and the inner wall of the welding frame, and the bottom side of the welding frame is symmetrically provided with a clamping plate for clamping the frame.

[0010] As an optional solution for the electric transport vehicle frame welding device described in the present invention, a groove is provided on the inner side of the welding frame, the clamping plate is slidably inserted in the groove, a locking spring is installed between the clamping plate and the groove, a locking column is provided on the inner side of the welding frame, a rubber head is installed on the end of the locking column, and a locking column that contacts the rubber head is installed on the upper side of the clamping plate.

[0011] As an optional solution of the electric transport vehicle frame welding device described in the present invention, the locking column includes a fixed column fixedly connected to the welding frame, a moving head slidably installed at the end of the fixed column, and a locking spring connected between the fixed column and the moving head, the rubber head is installed on the side of the moving head adjacent to the locking column, and a resist column is installed on the inner side of the clamping plate, and when the clamping plate clamps the frame, the resist column contacts the moving head.

[0012] As an optional solution for the electric transport truck frame welding device described in the present invention, two sliding flat grooves are provided on the side of the support frame, and the first unlocking rod and the second unlocking rod are slidably installed in the two sliding flat grooves respectively, and the bottom ends of the first unlocking rod and the second unlocking rod are connected with an inclined curved portion for unlocking the card plate, and the side of the card plate is connected with an unlocking column, the unlocking column is slidably installed with the welding frame, and the unlocking column passes through the welding frame, when the end of the unlocking column contacts the inclined curved portion, the unlocking column is offset, the card plate moves toward the direction of the groove, and the locking column overcomes the rubber head.

[0013] As an optional solution of the electric transport vehicle frame welding device described in the present invention, wherein: a first rack is installed on the side of the first unlocking lever, a second rack is installed on the side of the second unlocking lever, a mounting plate is installed on the support frame, a transmission gear is rotatably installed on the side of the mounting plate, the second rack and the first rack are simultaneously meshed with the transmission gear, and the swivel seat is transmission-connected to the transmission gear;

[0014] When the rotating seat rotates, the transmission gear drives the first unlocking rod and the second unlocking rod to translate.

[0015] As an optional solution of the electric transport vehicle frame welding device described in the present invention, a helical gear ring is coaxially installed on the outer side of the swivel seat, a bevel gear is coaxially installed on the transmission gear, and the bevel gear is meshed with the helical gear ring.

[0016] As an optional solution for the electric transport truck frame welding device described in the present invention, the conveying belt is configured as an electric crawler conveyor belt, a plurality of support rollers are arranged under the welding frame, and the plurality of support rollers are rotatably installed under the conveying belt for supporting the frame.

[0017] The present invention has the following beneficial effects:

[0018] 1. The electric transport vehicle frame welding device can realize automatic welding through the cooperation of the manipulator and the welding gun, which is more efficient than manual welding. Different from the traditional solution, this solution puts the frame on the conveyor belt for transmission. When the frame needs to be welded, the cylinder and the welding frame are used to move the welding frame down to clamp the frame below, so as to realize automatic loading of the frame. Moreover, after welding one side, the welding frame is driven by the flip motor to rotate to turn the frame over, so as to automatically weld the other side of the frame. This solution automates welding and loading and unloading, reduces labor costs, improves welding efficiency, and avoids the problem of safety hazards caused by manual material connection.

[0019] 2. The electric transport vehicle frame welding device can realize the flipping of the welding frame through the rotation installation of the welding frame and the mobile frame and the driving of the flipping motor, so as to automatically flip the frame for welding. In addition, through the setting of the worm and the worm gear, the self-locking characteristics of the welding frame are utilized, so that the welding frame is difficult to move after flipping and can only be driven to rotate by the worm end, thereby ensuring the stability of the welding frame after rotation;

[0020] It should be noted that in order to reserve enough flipping space, after completing the welding on one side of the frame, the reduction motor drives the swivel seat to rotate, so that the entire manipulator rotates, allowing the welding gun to move away from the direction of the welding frame to ensure that the welding frame will not collide with the manipulator when flipping.

[0021] 3. The electric transport vehicle frame welding device, through the cooperation of the clamping plate and the clamping spring, enables the welding frame to frame the frame after moving down, and because the bottom side of the clamping plate is rounded, the frame can be squeezed between the two clamping plates by extrusion, and adaptively adjusted by the clamping spring;

[0022] In addition, in order to ensure the fixation of the frame, a clamping plate is also provided. When the clamping plate is clamped and moved, it will trigger the collision between the supporting column and the fixing column, so that the locking column breaks through the restriction of the rubber head and the clamping plate is extended to engage with the bottom of the frame. In this way, the frame is not only locked during the welding process, but also can be restricted when flipping, so that the frame will not fall off.

[0023] Furthermore, in order to realize automatic unloading, the present solution utilizes the rotation of the swivel seat, cooperates with the action of the first unlocking rod, the second unlocking rod and the inclined curved portion. When welding is completed, the welding frame needs to be flipped back first, and the meshing transmission is utilized to increase the distance between the first unlocking rod and the second unlocking rod. Therefore, during the downward movement of the mobile frame to unload materials, the unlocking column contacts the inclined curved portion, thereby causing the unlocking column to move toward the groove direction, and the locking column returns to the state restricted by the rubber head. The clamping plate retracts into the welding frame, thereby realizing the unlocking of the frame. Because the clamping plate is a smooth flat plate, its clamping effect is limited. Therefore, during unloading, under the influence of gravity, the frame will naturally slide onto the conveyor track to complete automatic unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0025] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention during welding flipping.

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the unlocking lever of the present invention.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the welding frame of the present invention.

[0029] Figure 6 It is a schematic diagram of the cross-sectional structure of the welding frame of the present invention.

[0030] Figure 7 For the present invention Figure 4 A is an enlarged structural diagram of FIG.

[0031] Figure 8 For the present invention Figure 6 Schematic diagram of the enlarged structure at B.

[0032] Fig. 9 For the present invention Figure 6 Schematic diagram of the structure at point B when the welding frame is engaged.

[0033] Fig.10 For the present invention Figure 6 Schematic diagram of the structure at position B when the welding frame is unlocked.

[0034] In the figure: 110, manipulator; 120, base; 130, reduction motor; 140, swivel seat; 150, welding gun; 210, conveyor track; 220, support roller; 230, support frame; 240, lifting slide; 250, mobile frame; 260, cylinder; 270, mounting plate; 310, welding frame; 311, groove; 312, engaging spring; 320, contour groove; 330, clamping plate; 331, pillar; 340, limit groove; 350, clamping spring; 360, clamping plate ; 361, locking column; 370, unlocking column; 380, locking column; 381, fixed column; 382, ​​moving head; 383, locking spring; 390, rubber head; 410, first unlocking lever; 411, second unlocking lever; 420, oblique curved portion; 430, first rack; 431, second rack; 440, bevel gear ring; 450, transmission gear; 460, bevel gear; 470, sliding flat groove; 510, vertical plate; 520, flip motor; 530, worm; 540, worm wheel. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1: This embodiment is intended to solve the problem that after welding is completed, manual unloading is generally required. When the frame is large, it may be necessary to cooperate with the hook for unloading, resulting in a long overall welding time and insufficient efficiency. This not only increases the labor cost, but may also cause damage to the frame or personal injury due to improper operation. Please refer to Figure 1-Figure 10A welding device for an electric transport vehicle frame includes a manipulator 110, a base 120 and a welding gun 150, wherein the welding gun 150 is mounted on the mobile end of the manipulator 110, a reduction motor 130 and a swivel seat 140 are mounted on the base 120, the output shaft of the reduction motor 130 is connected to the swivel seat 140, the manipulator 110 is mounted on the swivel seat 140, a conveying crawler 210 for transporting the electric transport vehicle frame is arranged at the front side of the base 120, a supporting frame 230 is mounted at the side of the base 120, a moving frame 250 is slidably mounted on the supporting frame 230, a welding frame 310 for placing the frame is mounted in the middle of the moving frame 250, and a flip motor 520 for driving the welding frame 310 to rotate is mounted at the side of the moving frame 250;

[0037] After the rotating seat 140 rotates, the welding gun 150 moves away from the welding frame 310 , and the turning motor 520 drives the welding frame 310 to turn over.

[0038] The support frame 230 is provided with a lifting slot 240, which is set as a vertical slot. The mobile frame 250 is slidably engaged with the lifting slot 240. The support frame 230 is provided with a cylinder 260, and the telescopic end of the cylinder 260 is connected to the mobile frame 250. The mobile frame 250 is driven up and down by the cylinder 260, thereby driving the welding frame 310 to move up and down, so as to realize the picking and placing of the frame.

[0039] See Figure 1 The conveyor belt 210 is configured as an electric conveyor belt, and a plurality of support rollers 220 are disposed below the welding frame 310. The plurality of support rollers 220 are rotatably mounted below the conveyor belt 210 to support the vehicle frame. The conveyor belt 210 is configured as an intermittently operated belt, and the conveyor belt 210 and the base 120 are provided with an existing positioning system, or are manually positioned, so that the welding frame 310 can be just docked with the vehicle frame. It should be noted that the conveyor belt 210 does not move during the welding process.

[0040] It should be noted that the manipulator 110 and welding gun 150 used in this embodiment are both existing technologies. Manipulator welding can achieve high-precision positioning and welding and reduce errors caused by human factors.

[0041] In this embodiment: through the cooperation of the manipulator 110 and the welding gun 150, automated welding can be achieved, which is more efficient than manual welding. Unlike the traditional solution, this solution places the frame on the conveyor belt 210 for transmission. When the frame needs to be welded, the cylinder 260 and the welding frame 310 are used to cooperate to move the welding frame 310 downward to clamp the frame below, thereby realizing automatic loading of the frame. After welding one side, the flip motor 520 is used to drive the welding frame 310 to rotate to flip the frame, thereby automatically welding the other side of the frame. After welding, the cylinder 260 is used to allow the welding frame 310 to place the welded frame on the conveyor belt 210 for continued transmission. Compared with manual loading and unloading during welding, this solution automates welding and loading and unloading, reduces labor costs, improves welding efficiency, and avoids the problem of safety hazards caused by manual material connection.

[0042] Embodiment 2: This embodiment is intended to solve the problem that the welding frame 310 needs to be locked after flipping, otherwise the welding accuracy will be affected. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-Figure 10 The welding frame 310 is rotatably installed in the middle of the moving frame 250, a vertical plate 510 is installed on one side of the moving frame 250, a flip motor 520 is installed on one side of the vertical plate 510, a worm 530 is rotatably installed on the other side of the vertical plate 510, the output shaft of the flip motor 520 is connected to the worm 530, a worm gear 540 is rotatably installed on the side of the moving frame 250, the worm 530 is meshed with the worm gear 540, and the rotating shaft of the welding frame 310 is coaxially connected with the worm gear 540.

[0043] See Figure 3 It should be noted that in order to reserve enough flipping space, after completing the welding on one side of the frame, the reduction motor 130 drives the swivel seat 140 to rotate, so that the entire manipulator 110 rotates, allowing the welding gun 150 to move away from the direction of the welding frame 310, ensuring that the welding frame 310 does not collide with the manipulator 110 when flipping.

[0044] In this embodiment: through the rotation installation of the welding frame 310 and the movable frame 250, and the driving of the flipping motor 520, the welding frame 310 can be flipped, so as to automatically flip the frame for welding. Moreover, through the setting of the worm 530 and the worm wheel 540, utilizing their self-locking characteristics, the welding frame 310 is difficult to move after flipping, and can only be driven to rotate by the worm 530 end, thereby ensuring the stability of the welding frame 310 after rotation.

[0045] Embodiment 3: This embodiment aims to promote the solution of the problem of automatic loading and unloading and reducing labor costs. This embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figure 1-Figure 10The side of the welding frame 310 is provided with a profile slot 320, and the inner wall of the profile slot 320 is symmetrically provided with a clamping plate 330, which is provided as a smooth flat plate with a rounded corner at one side edge, and a clamping spring 350 is installed between the clamping plate 330 and the inner wall of the welding frame 310, and a clamping plate 360 ​​is symmetrically provided at the bottom of the welding frame 310 for clamping the frame. The side of the clamping plate 360 ​​adjacent to the frame is also provided with a rounded corner, so as to facilitate lifting and clamping the bottom of the frame.

[0046] A groove 311 is provided on the inner side of the welding frame 310, and the card plate 360 ​​is slidably inserted in the groove 311. A locking spring 312 is installed between the card plate 360 ​​and the groove 311. A locking column 380 is provided on the inner side of the welding frame 310, and a rubber head 390 is installed on the end of the locking column 380. A locking column 361 that contacts the rubber head 390 is installed on the upper side of the card plate 360.

[0047] See Figure 5 A limiting groove 340 is provided on the bottom side of the clamping plate 330 , and the clamping plate 360 ​​is slidably fitted in the limiting groove 340 .

[0048] See Figure 8 The locking column 380 includes a fixed column 381 fixedly connected to the welding frame 310, a moving head 382 slidably installed at the end of the fixed column 381, and a locking spring 383 connected between the fixed column 381 and the moving head 382. The rubber head 390 is installed on the side of the moving head 382 adjacent to the locking column 361. A resisting column 331 is installed on the inner side of the clamping plate 330. When the clamping plate 330 clamps the frame, the resisting column 331 contacts the moving head 382.

[0049] See Figure 4 Two sliding flat grooves 470 are provided on the side of the support frame 230, and the first unlocking rod 410 and the second unlocking rod 411 are slidably installed in the two sliding flat grooves 470 respectively. The bottom ends of the first unlocking rod 410 and the second unlocking rod 411 are connected to the oblique bending part 420 for unlocking the card plate 360. The side of the card plate 360 ​​is connected to the unlocking column 370. The unlocking column 370 is slidably installed with the welding frame 310, and the unlocking column 370 passes through the welding frame 310. When the end of the unlocking column 370 contacts the oblique bending part 420, the unlocking column 370 is offset, the card plate 360 ​​moves toward the groove 311, and the locking column 361 overcomes the rubber head 390.

[0050] The first unlocking lever 410 is provided with a first rack 430 on its side, the second unlocking lever 411 is provided with a second rack 431 on its side, the support frame 230 is provided with a mounting plate 270, a transmission gear 450 is rotatably mounted on the side of the mounting plate 270, the second rack 431 and the first rack 430 are simultaneously meshed with the transmission gear 450, and the rotating seat 140 is in transmission connection with the transmission gear 450. For specific configuration, see Figure 4 and Figure 7A helical gear ring 440 is coaxially mounted on the outer side of the rotating seat 140 , and a bevel gear 460 is coaxially mounted on the transmission gear 450 . The bevel gear 460 meshes with the helical gear ring 440 .

[0051] When the rotating seat 140 rotates, the transmission gear 450 drives the first unlocking lever 410 and the second unlocking lever 411 to translate.

[0052] When welding is completed, the welding frame 310 needs to be turned back first. At this time, the rotating seat 140 rotates the manipulator 110 to avoid it. When the rotating seat 140 rotates, it will drive the transmission gear 450 to rotate, so that the distance between the first unlocking rod 410 and the second unlocking rod 411 is increased by meshing transmission. Therefore, during the downward movement of the mobile frame 250 to discharge materials, the unlocking column 370 contacts the oblique curved portion 420, so that the unlocking column 370 moves toward the groove 311, so that the locking column 361 originally located between the rubber head 390 and the support column 331 breaks through the rubber head 390 again, so that the locking column 361 returns to the state restricted by the rubber head 390, and the clamping plate 360 ​​retracts into the welding frame 310, thereby unlocking the frame. It should be noted that the lateral distance that the oblique curved portion 420 drives the unlocking column 370 to move is sufficient to overcome the elastic force of the locking spring 312.

[0053] After the material is unloaded, the robot 110 rotates and resets, so that the first unlocking rod 410 and the second unlocking rod 411 are close to each other. Therefore, when loading the material, the unlocking column 370 will not encounter the inclined curved portion 420 during the downward movement, so it will not be forcibly unlocked.

[0054] In this embodiment: through the cooperation of the clamping plate 330 and the clamping spring 350, the welding frame 310 can frame the vehicle frame after moving downward, and because the bottom side of the clamping plate 330 is rounded, the vehicle frame can be squeezed between the two clamping plates 330 by squeezing, and the clamping spring 350 can be used for adaptive adjustment;

[0055] In addition, in order to ensure the fixation of the frame, a clamping plate 360 ​​is provided. When the clamping plate 330 is clamped and moved, Fig. 9 , which will trigger the collision between the stop column 331 and the fixing column 381, so that the locking column 361 breaks through the restriction of the rubber head 390, and the clamping plate 360 ​​is extended to engage with the bottom of the frame. In this way, the frame is not only locked during the welding process, but also can be restricted when flipping, so that the frame will not fall off;

[0056] In order to realize automatic unloading, this solution utilizes the rotation of the swivel seat 140, cooperates with the first unlocking rod 410, the second unlocking rod 411 and the oblique bending part 420. When welding is completed, the welding frame 310 needs to be flipped back first. At this time, the swivel seat 140 rotates the manipulator 110 to avoid it. When the swivel seat 140 rotates, it will drive the transmission gear 450 to rotate, so that the distance between the first unlocking rod 410 and the second unlocking rod 411 is increased by meshing transmission. Therefore, when the mobile frame 250 moves down to unload materials, the unlocking column 370 contacts the oblique bending part 420, so that the unlocking column 370 moves toward the groove 311. Fig.10 , so that the locking column 361 originally located between the rubber head 390 and the support column 331 breaks through the rubber head 390 again, so that the locking column 361 returns to the state restricted by the rubber head 390, and the clamping plate 360 ​​retracts into the welding frame 310, thereby unlocking the frame. Because the clamping plate 330 is a smooth flat plate, its clamping effect is limited. Therefore, when unloading, under the influence of gravity, the frame will naturally slide onto the conveyor crawler 210 to complete automatic unloading;

[0057] In summary, this embodiment realizes the functions of automatic welding, automatic loading and unloading, and flip welding of the frame, which significantly improves the welding efficiency and reduces the labor cost. At the same time, it also pays attention to the safety and stability design to ensure the smooth progress of the welding process.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electric transport vehicle frame welding device, comprising a manipulator (110), a base (120) and a welding gun (150), wherein the welding gun (150) is installed at a moving end of the manipulator (110), and is characterized in that: A reduction motor (130) and a rotating seat (140) are installed on the base (120), the output shaft of the reduction motor (130) is connected to the rotating seat (140), the manipulator (110) is installed on the rotating seat (140), a conveying crawler (210) for transporting the frame of the electric transport vehicle is arranged on the front side of the base (120), a supporting frame (230) is installed on the side of the base (120), a moving frame (250) is slidably installed on the supporting frame (230), a welding frame (310) for placing the frame is installed in the middle of the moving frame (250), and a flip motor (520) for driving the welding frame (310) to rotate is installed on the side of the moving frame (250); A locking column (380) is arranged inside the welding frame (310), a rubber head (390) is installed at the end of the locking column (380), a clamping plate (360) is symmetrically arranged on the bottom side of the welding frame (310) for clamping the vehicle frame, and a locking column (361) that contacts the rubber head (390) is installed on the upper side of the clamping plate (360); The support frame (230) has two sliding flat grooves (470) on its side, and the two sliding flat grooves (470) are respectively slidably mounted with a first unlocking rod (410) and a second unlocking rod (411), and the bottom ends of the first unlocking rod (410) and the second unlocking rod (411) are both connected to an oblique curved portion (420) for unlocking the card plate (360), and the side of the card plate (360) is connected to an unlocking column (370), and the unlocking column (370) is slidably mounted on the welding frame (310), and the unlocking column (370) is connected to the welding frame (310). 0) passes through the welding frame (310), a first rack (430) is installed on the side of the first unlocking lever (410), a second rack (431) is installed on the side of the second unlocking lever (411), a mounting plate (270) is installed on the support frame (230), a transmission gear (450) is rotatably installed on the side of the mounting plate (270), the second rack (431) and the first rack (430) are meshed with the transmission gear (450) at the same time, and the rotating seat (140) is transmission-connected with the transmission gear (450).

2. An electric transport vehicle frame welding device according to claim 1, characterized in that: The support frame (230) is provided with a lifting slot (240), the lifting slot (240) being arranged as a vertical slot, the movable frame (250) being slidably engaged with the lifting slot (240), the support frame (230) being provided with a cylinder (260), the telescopic end of the cylinder (260) being connected to the movable frame (250).

3. An electric transport vehicle frame welding device according to claim 1, characterized in that: The welding frame (310) is rotatably mounted in the middle of the moving frame (250); a vertical plate (510) is mounted on one side of the moving frame (250); a flip motor (520) is mounted on one side of the vertical plate (510); a worm (530) is rotatably mounted on the other side of the vertical plate (510); an output shaft of the flip motor (520) is connected to the worm (530); a worm wheel (540) is rotatably mounted on the side of the moving frame (250); the worm (530) is meshed with the worm wheel (540); and a rotating shaft of the welding frame (310) is coaxially connected to the worm wheel (540); After the rotating seat (140) rotates, the welding gun (150) moves away from the welding frame (310), and the turning motor (520) drives the welding frame (310) to turn over.

4. An electric transport vehicle frame welding device according to claim 1, characterized in that: A contour slot (320) is provided on the side of the welding frame (310), and a clamping plate (330) is symmetrically provided on the inner wall of the contour slot (320). The clamping plate (330) is provided as a smooth flat plate with a rounded corner on one side edge, and a clamping spring (350) is installed between the clamping plate (330) and the inner wall of the welding frame (310).

5. An electric transport vehicle frame welding device according to claim 4, characterized in that: A groove (311) is provided on the inner side of the welding frame (310), the clamping plate (360) is slidably inserted in the groove (311), and a clamping spring (312) is installed between the clamping plate (360) and the groove (311).

6. An electric transport vehicle frame welding device according to claim 5, characterized in that: The locking column (380) comprises a fixed column (381) fixedly connected to the welding frame (310), a moving head (382) slidably mounted on the end of the fixed column (381), and a locking spring (383) connected between the fixed column (381) and the moving head (382). The rubber head (390) is mounted on a side of the moving head (382) adjacent to the locking column (361). A resisting column (331) is mounted on the inner side of the clamping plate (330). When the clamping plate (330) clamps the vehicle frame, the resisting column (331) contacts the moving head (382).

7. An electric transport vehicle frame welding device according to claim 6, characterized in that: When the end of the unlocking column (370) contacts the oblique curved portion (420), the unlocking column (370) is offset, the clamping plate (360) moves in the direction of the groove (311), and the locking column (361) overcomes the rubber head (390).

8. An electric transport vehicle frame welding device according to claim 7, characterized in that: When the rotating seat (140) rotates, the transmission gear (450) drives the first unlocking rod (410) and the second unlocking rod (411) to translate.

9. An electric transport vehicle frame welding device according to claim 8, characterized in that: A helical gear ring (440) is coaxially mounted on the outer side of the rotating seat (140), a bevel gear (460) is coaxially mounted on the transmission gear (450), and the bevel gear (460) is meshed with the helical gear ring (440).

10. An electric transport vehicle frame welding device according to claim 1, characterized in that: The conveying crawler belt (210) is configured as an electric crawler conveyor belt, and a plurality of supporting rollers (220) are disposed below the welding frame (310). The plurality of supporting rollers (220) are rotatably mounted below the conveying crawler belt (210) and are used to support the vehicle frame.

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