CN119077203B

CN119077203B - Electric transport vehicle frame welding device

Info

Publication number: CN119077203B
Application number: CN202411540864.2A
Authority: CN
Inventors: 梁磊; 谢红来
Original assignee: Zhejiang Shibeida Logistics Equipment Co ltd
Current assignee: Zhejiang Shibeida Logistics Equipment Co ltd
Priority date: 2024-10-31
Filing date: 2024-10-31
Publication date: 2025-03-28
Anticipated expiration: 2044-10-31
Also published as: CN119077203A

Abstract

The invention relates to the technical field of electric carrier processing and discloses an electric carrier frame welding device which comprises a manipulator, a base and a welding gun, wherein the welding gun is arranged at the moving end of the manipulator, a speed reducing motor and a rotating seat are arranged on the base, an output shaft of the speed reducing motor is connected with the rotating seat, the manipulator is arranged on the rotating seat, a conveying crawler belt for conveying an electric carrier frame is arranged on the front side of the base, a support frame is arranged on the side part of the base, a moving frame is arranged on the support frame in a sliding mode, a welding frame for placing the frame is arranged in the middle of the moving frame, a turnover motor for driving the welding frame to rotate is arranged on the side part of the moving frame, and after the rotating seat rotates, the welding gun is far away from the welding frame, and the turnover motor drives the welding frame to turn. According to the scheme, automatic welding and automatic feeding and discharging are achieved, labor cost is reduced, welding efficiency is improved, and the problem that potential safety hazards are caused by manual material receiving is avoided.

Description

Electric carrier frame welding device

Technical Field

The invention relates to the technical field of electric carrier processing, in particular to a welding device for a frame of an electric carrier.

Background

The electric carrier is mainly used for carrying and transporting indoor and outdoor materials and is widely applied to places such as logistics, warehouses, markets, workshops, schools, airports and the like. The structure of the automatic cargo handling device generally comprises a plurality of parts such as cargo handling and stacking, cargo sorting, handling and transporting and the like, and can meet the handling requirements in different scenes. The frame is used as a key component of the electric carrier, and the welding quality of the frame directly influences the performance and the service life of the whole electric carrier.

When a large-sized electric carrier is welded, the large-sized electric carrier is usually placed on a welding frame and fixed in a clamping mode, and then a mechanical arm is used for carrying out automatic welding in cooperation with a welding gun. After one side of the frame is welded, the welding frame is turned over, so that the frame of the electric carrier is turned over, the other side of the frame is welded continuously, after the welding is finished, manual blanking is generally needed, when the frame is large, the frame is possibly required to be matched with a hook for blanking, so that the whole welding process is long in use and insufficient in efficiency, the labor cost is increased, the frame is possibly damaged or injured due to improper operation, the existing requirements are not met, and the welding device for the frame of the electric carrier is provided.

Disclosure of Invention

The invention provides a welding device for a frame of an electric carrier, which has the beneficial effects of automatically feeding and discharging on the basis of automatic welding, reducing labor cost and improving the overall efficiency of welding, and solves the problems that the frame is damaged or injured by personnel due to improper operation as the frame is required to be fed by combining with a hook when the frame is large and the overall welding is longer because the frame is required to be fed by manpower after the welding is finished.

The invention provides a technical scheme that the welding device for the frame of an electric carrier comprises a manipulator, a base and a welding gun, wherein the welding gun is arranged at the moving end of the manipulator, a speed reducing motor and a rotating seat are arranged on the base, an output shaft of the speed reducing motor is connected with the rotating seat, the manipulator is arranged on the rotating seat, a conveying crawler belt for conveying the frame of the electric carrier is arranged on the front side of the base, a supporting frame is arranged on the side part of the base, a moving frame is slidably arranged on the supporting frame, a welding frame for placing the frame is arranged in the middle of the moving frame, and a turnover motor for driving the welding frame to rotate is arranged on the side part of the moving frame;

After the rotary seat rotates, the welding gun is far away from the welding frame, and the overturning motor drives the welding frame to overturn.

As an alternative scheme of the electric carrier frame welding device, the electric carrier frame welding device comprises a supporting frame, wherein a lifting chute is formed in the supporting frame, the lifting chute is arranged to be a vertical chute, the movable frame is in sliding clamping connection with the lifting chute, an air cylinder is mounted on the supporting frame, and the telescopic end of the air cylinder is connected with the movable frame.

As an alternative scheme of the electric carrier frame welding device, the welding frame is rotatably arranged in the middle of the movable frame, a vertical plate is arranged on one side of the movable frame, the overturning motor is arranged on one side of the vertical plate, a worm is rotatably arranged on the other side of the vertical plate, an output shaft of the overturning motor is connected with the worm, a worm wheel is rotatably arranged on the side of the movable frame, the worm is meshed with the worm wheel, and a rotating shaft of the welding frame is coaxially connected with the worm wheel.

As an alternative scheme of the electric carrier frame welding device, the side part of the welding frame is provided with the contour clamping groove, the inner wall of the contour clamping groove is symmetrically provided with the clamping plate, the clamping plate is a smooth flat plate with a round corner at one side edge, the clamping spring is arranged between the clamping plate and the inner wall of the welding frame, and clamping plates are symmetrically arranged at the bottom side of the welding frame and used for clamping the frame.

As an alternative scheme of the electric carrier frame welding device, the welding frame is provided with a groove at the inner side, the clamping plate is inserted into the groove in a sliding manner, a clamping spring is arranged between the clamping plate and the groove, a clamping lock column is arranged at the inner side of the welding frame, a rubber head is arranged at the end part of the clamping lock column, and a locking column which is in contact with the rubber head is arranged at the upper side of the clamping plate.

As an alternative scheme of the electric carrier frame welding device, the clamping lock column comprises a fixed column fixedly connected with the welding frame, a moving head slidably mounted at the end part of the fixed column, and a clamping lock spring connected between the fixed column and the moving head, wherein the rubber head is mounted at one side of the moving head adjacent to the locking column, a supporting column is mounted at the inner side of the clamping plate, and when the clamping plate clamps the frame, the supporting column is in contact with the moving head.

As an alternative scheme of the electric carrier frame welding device, two sliding flat grooves are formed in the side portion of the supporting frame, a first unlocking rod and a second unlocking rod are respectively arranged in the two sliding flat grooves in a sliding mode, the bottom ends of the first unlocking rod and the bottom ends of the second unlocking rod are connected with inclined bending portions for unlocking the clamping plates, unlocking columns are connected with the side portion of the clamping plates and are in sliding installation with the welding frame, the unlocking columns penetrate through the welding frame, when the end portions of the unlocking columns are in contact with the inclined bending portions, the unlocking columns are deviated, the clamping plates move towards the grooves, and the locking columns overcome the rubber heads.

As an alternative scheme of the electric carrier frame welding device, the invention comprises a first unlocking rod, a second unlocking rod, a support frame, a transmission gear, a rotating seat and a transmission gear, wherein the first rack is arranged on the side part of the first unlocking rod, the second rack is arranged on the side part of the second unlocking rod, the support frame is provided with the mounting plate, the transmission gear is rotatably arranged on the side part of the mounting plate, the second rack and the first rack are simultaneously meshed with the transmission gear, and the rotating seat is in transmission connection with the transmission gear;

When the rotary seat rotates, the transmission gear drives the first unlocking rod and the second unlocking rod to translate.

As an alternative scheme of the welding device for the electric carrier frame, the invention is characterized in that an inclined gear ring is coaxially arranged on the outer side of the rotary seat, a bevel gear is coaxially arranged on the transmission gear, and the bevel gear is meshed with the inclined gear ring.

As an alternative scheme of the electric carrier frame welding device, the electric carrier frame welding device is characterized in that the conveying crawler belt is an electric crawler belt, a plurality of supporting rollers are arranged below the welding frame, and the supporting rollers are rotatably arranged below the conveying crawler belt and used for supporting the carrier frame.

The invention has the following beneficial effects:

1. The electric carrier frame welding device can realize automatic welding through the cooperation of the manipulator and the welding gun, is more efficient than manual welding, and is different from the traditional scheme in that the frame is placed on the conveying crawler belt for conveying, when the frame is required to be welded, the welding frame is downwards moved by utilizing the cooperation of the air cylinder and the welding frame, so that the frame below is clamped, the automatic feeding of the frame is realized, and after one face of the frame is welded, the welding frame is driven to rotate by the overturning motor, so that the frame is overturned, and the other face of the frame is automatically welded.

2. According to the electric carrier frame welding device, the welding frame and the moving frame are rotatably installed, and the overturning motor is driven to overturn the welding frame, so that the frame is automatically welded in an overturning mode;

It should be noted that, in order to reserve enough upset space, after the welding of completion frame one side, gear motor operation drives the swivel mount and rotates to make whole manipulator rotation, let welder keep away from the welding frame place direction, ensure that welding frame can not collide with the manipulator when overturning.

3. According to the electric carrier frame welding device, the welding frame can frame the frame after downwards moving through the matching of the clamping plates and the clamping springs, and the frame can be extruded between the two clamping plates through extrusion due to the fact that the bottom sides of the clamping plates are rounded, and the welding frame is adjusted through the clamping springs;

in order to ensure the fixation of the frame, the clamping plate is further arranged, and the collision between the supporting column and the fixing column is triggered when the clamping plate clamps and moves, so that the locking column breaks through the limit of the rubber head, the clamping plate stretches out to clamp the bottom of the frame, and therefore, the frame is restrained in the welding process, the limit of the frame can be enhanced when the frame is overturned, and the frame cannot fall off;

Further, in order to realize automatic unloading, rotation of swivel mount is utilized to this scheme, cooperation first unlocking lever, second unlocking lever and the effect of crooked portion to one side, when accomplishing the welding, the welding frame needs to overturn earlier and go back, utilize meshing transmission to let first unlocking lever and second unlocking lever interval grow, consequently, move down the blowing in-process at the movable frame, unlocking post and crooked portion contact to one side, thereby make unlocking post to recess direction removal, the locking post returns the state that is restricted by the rubber head, in the cardboard withdrawal welding frame, the unblock to the frame has been realized, because the grip block is smooth flat board, its clamping effect is limited, consequently, when the blowing, receive gravity influence, the frame can natural slide to the conveying track, accomplish automatic unloading.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the overall structure of the present invention.

Fig. 3 is a schematic view of a three-dimensional structure of the invention during welding and overturning.

Fig. 4 is a schematic perspective view of an unlocking lever according to the present invention.

Fig. 5 is a schematic view of the three-dimensional structure of the welding frame of the present invention.

Fig. 6 is a schematic cross-sectional view of a weld stack according to the present invention.

Fig. 7 is an enlarged schematic view of the structure of fig. 4a according to the present invention.

Fig. 8 is an enlarged schematic view of the structure of fig. 6B according to the present invention.

Fig. 9 is a schematic view of a structure at B when the welding frame of fig. 6 is engaged.

Fig. 10 is a schematic view of the structure of the welding frame of fig. 6 at B when the welding frame is unlocked.

In the figure, 110, a manipulator, 120, a base, 130, a speed reducing motor, 140, a swivel mount, 150, a welding gun, 210, a conveying crawler, 220, a supporting roller, 230, a supporting frame, 240, a lifting chute, 250, a moving frame, 260, a cylinder, 270, a mounting plate, 310, a welding frame, 311, a groove, 312, a clamping spring, 320, a profile clamping groove, 330, a clamping plate, 331, a prop, 340, a limit through groove, 350, a clamping spring, 360, a clamping plate, 361, a locking post, 370, an unlocking post, 380, a locking post, 381, a fixed post, 382, a moving head, 383, a locking spring, 390, a rubber head, 410, a first unlocking rod, 411, a second unlocking rod, 420, a bevel gear ring, a bevel bend, 430, a first rack, 431, a second rack, 440, a bevel gear ring, 450, a transmission gear, 460, a bevel gear, 470, a sliding flat groove, 510, a vertical plate, 520, a turnover motor, 530, a worm, 540 and a worm gear.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the first embodiment, in order to facilitate solving the problems that after welding is completed, manual blanking is generally required, and when a frame is large, blanking is possibly required by matching with a hook, so that the welding is long in whole time and insufficient in efficiency, which not only increases labor cost, but also can cause damage to the frame or injury to personnel due to improper operation, referring to fig. 1-10, an electric truck frame welding device comprises a manipulator 110, a base 120 and a welding gun 150, wherein the welding gun 150 is arranged at the moving end of the manipulator 110, the base 120 is provided with a speed reducing motor 130 and a swivel mount 140, an output shaft of the speed reducing motor 130 is connected with the swivel mount 140, the manipulator 110 is arranged on the swivel mount 140, a conveying track 210 for conveying the electric truck frame is arranged at the front side of the base 120, a support frame 230 is arranged at the side part of the base 120, a movable frame 250 is slidably arranged on the support frame 230, a welding frame 310 for placing the frame is arranged in the middle of the movable frame 250, and a turnover motor 520 for driving the welding frame 310 to rotate is arranged at the side part of the movable frame 250;

After the rotary base 140 rotates, the welding gun 150 is far away from the welding frame 310, and the overturning motor 520 drives the welding frame 310 to overturn.

The support 230 is provided with a lifting chute 240, the lifting chute 240 is arranged as a vertical chute, the movable frame 250 is in sliding engagement with the lifting chute 240, the support 230 is provided with an air cylinder 260, and the telescopic end of the air cylinder 260 is connected with the movable frame 250. The cylinder 260 drives the movable frame 250 to move up and down, so that the welding frame 310 is driven to lift, and the frame is taken and put.

Referring to fig. 1, the conveyor belt 210 is configured as an electric conveyor belt, and a plurality of support rollers 220 are provided under the welding frame 310, and the plurality of support rollers 220 are rotatably installed under the conveyor belt 210 for supporting the carriage. The conveying crawler 210 is configured as a crawler running intermittently, and the conveying crawler 210 and the base 120 are cooperatively configured with an existing positioning system, or are manually positioned, so that the welding frame 310 can just be docked with the frame, and it should be noted that the conveying crawler 210 does not move during the welding process.

It should be noted that, the manipulator 110 and the welding gun 150 used in this embodiment are both in the prior art, and the manipulator welding can achieve high-precision positioning and welding, so as to reduce errors caused by human factors.

In the embodiment, the automatic welding can be realized through the matching of the manipulator 110 and the welding gun 150, compared with the manual welding, the automatic welding is more efficient, and compared with the traditional scheme, the scheme is characterized in that the frame is placed on the conveying crawler 210 for conveying, when the frame is required to be welded, the welding frame 310 is downwards moved by the matching of the air cylinder 260 and the welding frame 310, so that the frame below the frame is clamped, the automatic feeding of the frame is realized, the welding frame 310 is driven to rotate by the overturning motor 520 after one side is welded, the overturning of the frame is realized, the other side of the frame is automatically welded, and after the welding is finished, the welded frame 310 is placed on the conveying crawler 210 for continuous conveying by the air cylinder 260, compared with the manual feeding and discharging during the welding, the scheme is used for automatic welding and automatic feeding, so that the labor cost is reduced, the welding efficiency is improved, and the problem of potential safety hazards caused by manual material receiving is avoided.

In the second embodiment, in order to facilitate solving the problem that the welding precision is affected by locking the welding frame 310 after it is turned over, the first embodiment is an improvement made on the basis of the first embodiment, specifically, referring to fig. 1 to 10, the welding frame 310 is rotatably installed in the middle of the moving frame 250, a riser 510 is installed on one side of the moving frame 250, a turning motor 520 is installed on one side of the riser 510, a worm 530 is rotatably installed on the other side of the riser 510, an output shaft of the turning motor 520 is connected with the worm 530, a worm gear 540 is rotatably installed on a side portion of the moving frame 250, the worm 530 is meshed with the worm gear 540, and a rotating shaft of the welding frame 310 is coaxially connected with the worm gear 540.

Referring to fig. 3, it should be noted that, in order to reserve enough overturning space, after welding on one side of the frame is completed, the gear motor 130 operates to drive the swivel mount 140 to rotate, so that the whole manipulator 110 rotates, the welding gun 150 is far away from the direction in which the welding frame 310 is located, and it is ensured that the welding frame 310 cannot collide with the manipulator 110 when overturning.

In this embodiment, the welding frame 310 can be turned over by the rotation installation of the welding frame 310 and the moving frame 250 and the driving of the turning motor 520, so that the frame can be turned over automatically, and the welding frame 310 is difficult to move after being turned over by the arrangement of the worm 530 and the worm wheel 540 and can only be driven to rotate by the end of the worm 530 by utilizing the self-locking characteristic of the worm 530, so that the stability of the welding frame 310 after rotation is ensured.

In the third embodiment, the problem of automatic feeding and discharging and labor cost reduction is solved, the improvement is made on the basis of the second embodiment, specifically, referring to fig. 1-10, a profile clamping groove 320 is formed in the side portion of a welding frame 310, clamping plates 330 are symmetrically arranged on the inner wall of the profile clamping groove 320, the clamping plates 330 are smooth flat plates with rounded edges on one side, clamping springs 350 are installed between the clamping plates 330 and the inner wall of the welding frame 310, and clamping plates 360 are symmetrically arranged on the bottom side of the welding frame 310 and used for clamping a frame. The side of the clamping plate 360 adjacent to the frame is also provided with a rounding, so that the bottom of the frame is supported and clamped conveniently.

The welding frame 310 is provided with a groove 311 on the inner side, the clamping plate 360 is inserted in the groove 311 in a sliding manner, a clamping spring 312 is arranged between the clamping plate 360 and the groove 311, a clamping lock column 380 is arranged on the inner side of the welding frame 310, a rubber head 390 is arranged at the end part of the clamping lock column 380, and a locking column 361 which is in contact with the rubber head 390 is arranged on the upper side of the clamping plate 360.

Referring to fig. 5, a limiting through groove 340 is formed on the bottom side of the clamping plate 330, and a clamping plate 360 is in sliding fit with the limiting through groove 340.

Referring to fig. 8, the latch post 380 includes a fixed post 381 fixedly connected to the welding frame 310, a moving head 382 slidably mounted at an end of the fixed post 381, and a latch spring 383 connected between the fixed post 381 and the moving head 382, the rubber head 390 is mounted at a side of the moving head 382 adjacent to the locking post 361, the inner side of the clamping plate 330 is mounted with a supporting post 331, and the supporting post 331 abuts against the moving head 382 when the clamping plate 330 clamps the frame.

Referring to fig. 4, two sliding flat grooves 470 are formed in the side portion of the support frame 230, a first unlocking rod 410 and a second unlocking rod 411 are respectively and slidably mounted in the two sliding flat grooves 470, the bottom ends of the first unlocking rod 410 and the second unlocking rod 411 are both connected with a slant bending portion 420 for unlocking the clamping plate 360, an unlocking column 370 is connected to the side portion of the clamping plate 360, the unlocking column 370 is slidably mounted with the welding frame 310, the unlocking column 370 penetrates through the welding frame 310, when the end portion of the unlocking column 370 contacts with the slant bending portion 420, the unlocking column 370 is offset, the clamping plate 360 moves towards the direction of the groove 311, and the locking column 361 overcomes the rubber head 390.

The first rack 430 is installed on the side of the first unlocking rod 410, the second rack 431 is installed on the side of the second unlocking rod 411, the mounting plate 270 is installed on the supporting frame 230, the 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 rotary seat 140 is in transmission connection with the transmission gear 450. In a specific arrangement, referring to fig. 4 and 7, the outside of the swivel mount 140 is coaxially provided with a bevel gear ring 440, and the transmission gear 450 is coaxially provided with a bevel gear 460, the bevel gear 460 being engaged with the bevel gear ring 440.

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

When welding is completed, the welding frame 310 needs to be turned back firstly, at this time, the rotating base 140 rotates the manipulator 110 to avoid, and when the rotating base 140 rotates, the transmission gear 450 is driven to rotate, so that the distance between the first unlocking rod 410 and the second unlocking rod 411 is increased by utilizing meshing transmission, and therefore, in the process of moving and discharging the moving frame 250 downwards, the unlocking column 370 contacts with the inclined bending part 420, so that the unlocking column 370 moves towards the direction of the groove 311, the locking column 361 originally positioned between the rubber head 390 and the supporting column 331 breaks through the rubber head 390 again, the locking column 361 returns to a state limited by the rubber head 390, and the clamping plate 360 retracts into the welding frame 310, thereby unlocking the frame is realized. It should be noted that, the oblique bending portion 420 drives the unlocking post 370 to move by a lateral distance sufficient to overcome the elastic force of the engaging spring 312.

After the discharging is completed, the manipulator 110 rotates to reset, so that the first unlocking rod 410 and the second unlocking rod 411 are close to each other, and therefore, during the feeding, the inclined bending part 420 is not encountered in the downward moving process of the unlocking column 370, and therefore, the unlocking column is not forcibly unlocked.

In the embodiment, the welding frame 310 can frame the frame after the welding frame is downwards moved by the matching of the clamping plates 330 and the clamping springs 350, and the frame can be extruded between the two clamping plates 330 by extrusion and is adaptively adjusted by the clamping springs 350 because the bottom sides of the clamping plates 330 are in a rounded angle arrangement;

In addition, in order to ensure the fixation of the frame, a clamping plate 360 is further provided, when the clamping plate 330 clamps and moves, as shown in fig. 9, the collision between the supporting column 331 and the fixing column 381 is triggered, so that the locking column 361 breaks through the limitation of the rubber head 390, the clamping plate 360 stretches out to clamp the bottom of the frame, and therefore, the frame is not only limited in the welding process, but also limited to the frame can be reinforced in the overturning process, and the frame cannot fall off;

In order to realize automatic discharging, the scheme utilizes the rotation of the rotary seat 140, and the actions of the first unlocking rod 410, the second unlocking rod 411 and the inclined bending part 420 are matched, when welding is completed, the welding frame 310 needs to be overturned back, at the moment, the rotary seat 140 rotates the manipulator 110 to avoid, and the transmission gear 450 is driven to rotate when the rotary seat 140 rotates, so that the distance between the first unlocking rod 410 and the second unlocking rod 411 is increased by utilizing meshing transmission, and in the process of downward moving and discharging of the movable frame 250, the unlocking column 370 is contacted with the inclined bending part 420, so that the unlocking column 370 moves towards the direction of the groove 311, and the rubber head 390 is broken through again, so that the locking column 361 returns to a state limited by the rubber head 390, and the clamping plate 360 retracts into the welding frame 310, thereby realizing the unlocking of the frame, and the clamping plate 330 is a smooth flat plate, and is limited in the clamping effect, so that the frame naturally slides onto the transmission 210 under the influence of gravity during discharging, and automatic discharging is completed;

In conclusion, the automatic welding, automatic feeding and discharging, turnover welding and other functions of the frame are realized, the welding efficiency is remarkably improved, and the labor cost is reduced. Meanwhile, the design of safety and stability is also focused, and the smooth proceeding of the welding process is ensured.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims

1. The welding device for the electric carrier frame comprises a manipulator (110), a base (120) and a welding gun (150), wherein the welding gun (150) is installed at the moving end of the manipulator (110), and is characterized in that a speed reducing motor (130) and a rotating seat (140) are installed on the base (120), an output shaft of the speed reducing motor (130) is connected with the rotating seat (140), the manipulator (110) is installed on the rotating seat (140), a conveying crawler (210) for conveying the electric carrier frame is arranged on the front side of the base (120), a supporting frame (230) is installed on the side portion of the base (120), a movable frame (250) is installed on the supporting frame (230) in a sliding mode, a welding frame (310) for placing the frame is installed in the middle of the movable frame (250), and a turnover motor (520) for driving the welding frame (310) to rotate is installed on the side portion of the movable frame (250).

A locking column (380) is arranged on the inner side of the welding frame (310), a rubber head (390) is arranged at the end part of the locking column (380), clamping plates (360) are symmetrically arranged on the bottom side of the welding frame (310) and used for clamping the frame, and locking columns (361) which are in contact with the rubber head (390) are arranged on the upper side of the clamping plates (360);

Two sliding flat grooves (470) are formed in the side portion of the support frame (230), a first unlocking rod (410) and a second unlocking rod (411) are respectively and slidably mounted in the two sliding flat grooves (470), inclined bending portions (420) used for unlocking the clamping plates (360) are respectively connected to the bottom ends of the first unlocking rod (410) and the second unlocking rod (411), unlocking columns (370) are connected to the side portions of the clamping plates (360), the unlocking columns (370) are slidably mounted with the welding frame (310), the unlocking columns (370) penetrate through the welding frame (310), first racks (430) are mounted on the side portions of the first unlocking rod (410), second racks (431) are mounted on the side portions of the second unlocking rod (411), a mounting plate (270) is mounted on the support frame (230) in a rotating mode, the side portions of the mounting plate (270) are meshed with the transmission gears (450), and the second racks (431) and the first racks (430) are in transmission connection with the transmission gears (450).

2. The welding device for the frame of the electric carrier vehicle according to claim 1, wherein the supporting frame (230) is provided with a lifting chute (240), the lifting chute (240) is arranged as a vertical chute, the movable frame (250) is in sliding clamping with the lifting chute (240), the supporting frame (230) is provided with an air cylinder (260), and the telescopic end of the air cylinder (260) is connected with the movable frame (250).

3. The welding device for the frame of the electric carrier according to claim 1, wherein the welding frame (310) is rotatably installed in the middle of the movable frame (250), a vertical plate (510) is installed on one side of the movable frame (250), a turnover 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), an output shaft of the turnover motor (520) is connected with the worm (530), a worm wheel (540) is rotatably installed on the side of the movable frame (250), the worm (530) is meshed with the worm wheel (540), and a rotating shaft of the welding frame (310) is coaxially connected with the worm wheel (540);

After the rotary seat (140) rotates, the welding gun (150) is far away from the welding frame (310), and the overturning motor (520) drives the welding frame (310) to overturn.

4. The welding device for the electric carrier frame of claim 1, wherein the side part of the welding frame (310) is provided with a contour clamping groove (320), the inner wall of the contour clamping groove (320) is symmetrically provided with clamping plates (330), the clamping plates (330) are smooth flat plates with round corners at one side edges, and clamping springs (350) are arranged between the clamping plates (330) and the inner wall of the welding frame (310).

5. The welding device for the frame of the electric carrier vehicle according to claim 4, wherein the inner side of the welding frame (310) is provided with a groove (311), the clamping plate (360) is inserted into the groove (311) in a sliding manner, and a clamping spring (312) is arranged between the clamping plate (360) and the groove (311).

6. The welding device for the frame of the electric carrier vehicle according to claim 5, wherein the locking column (380) comprises a fixed column (381) fixedly connected with the welding frame (310), a moving head (382) slidably installed at the end part 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 one side of the moving head (382) adjacent to the locking column (361), the abutting column (331) is installed on the inner side of the clamping plate (330), and the abutting column (331) abuts against the moving head (382) when the clamping plate (330) clamps the frame.

7. The welding device for electric truck frames according to claim 6, characterized in that when the end of the unlocking post (370) is in contact with the oblique bending part (420), the unlocking post (370) is deviated, the clamping plate (360) moves toward the groove (311), and the locking post (361) overcomes the rubber head (390).

8. The welding device for electric truck frames according to claim 7, characterized in that when the swivel mount (140) rotates, the transmission gear (450) drives the first unlocking lever (410) and the second unlocking lever (411) to translate.

9. The welding device for a frame of an electric carrier according to claim 8, wherein the outside of the swivel mount (140) is coaxially provided with a bevel gear ring (440), the transmission gear (450) is coaxially provided with a bevel gear (460), and the bevel gear (460) is engaged with the bevel gear ring (440).

10. The welding device for the frame of the electric carrier vehicle according to claim 1, wherein the conveying crawler belt (210) is an electric crawler belt, a plurality of supporting rollers (220) are arranged below the welding frame (310), and the supporting rollers (220) are rotatably arranged below the conveying crawler belt (210) and used for supporting the frame.