Battery box welding equipment

Abstract

The invention relates to the technical field of battery box welding, in particular to battery box welding equipment which comprises an outer clamping assembly for fixing a battery box main body, an overturning assembly for driving the battery box main body to overturn, a welding assembly for welding the battery box main body and a feeding assembly for feeding a battery box bottom plate. According to the battery box welding device, the supporting pieces conduct clamping from the interior of the battery box body, the clamping plates conduct external clamping on the battery box body, under the action of the supporting pieces, the situation that the clamping plates press the battery box body to deform can be avoided, then comprehensive clamping of the battery box body is achieved, the battery box body can be fixed, and shaking of the battery box body in the welding process is avoided; and in addition, under the action of the supporting pieces, the situation that the battery box main body is damaged by clamping of the clamping plates can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of battery box welding, and in particular to a battery box welding device. Background Art

[0002] The basic function of the battery box is to accommodate and protect the battery pack. Its structure must ensure that the maximum accommodating space is reserved and meet sufficient strength to protect the battery from collision. In the prior art, the welding process of the battery box is generally to bend the plate three times by a bending machine to form the battery box body, then weld the ends of the body, weld the bottom plate to one end of the battery box, and finally install the battery box cover at the other end of the body to complete the processing of the battery box.

[0003] The patent with application number CN202321805502.2 discloses a welding machine for battery box production, including a main body lower shell, the top of the main body lower shell is fixed with a main body upper shell by bolts, the top of the main body upper shell is fixedly connected with four groups of support columns, the inner wall of each group of the support columns is fixedly installed with a motor 1, a fixing seat 1 is fixedly connected between every two groups of the support columns, and the inner wall of the fixing seat 1 is rotatably connected with a transmission rod 1, one end of each group of the transmission rod 1 is fixedly connected to the output end of the motor 1, the outer wall of each group of the transmission rod 1 is threadedly connected to a fixing seat 2, and the fixing seat 2 can move within a limited position in a channel opened on the inner wall of the fixing seat 1; the telescopic splint can be unfolded according to the movement of the splint body, so that the splint body and the telescopic splint can clamp battery boxes of different sizes, effectively reducing the time consumed by manual clamping.

[0004] The above application clamps battery boxes of different sizes by automatic clamping, which reduces the time consumed by manual clamping. However, the battery box cannot be rotated after clamping, resulting in a single welding angle. When the battery box is thin, excessive clamping force can easily cause the battery box to deform.

[0005] The application number CN202311716538.8 relates to the field of battery box welding fixtures, and discloses a new energy forklift battery box welding fixture. In the invention, two support boxes are fixedly arranged on both sides of the upper surface of the base, two turntables are arranged on the opposite sides of the two support boxes, and the opposite surfaces of the two turntables are connected to a flip frame, and a fixed block is arranged in the middle of the flip frame. The other side of the turntable is connected to an output shaft, and the other end of the output shaft is connected to the output end of the flip motor, and the flip motor is inside the support box. By setting a flip assembly, it is convenient for the staff to perform multi-angle welding on the battery box, and the convenience of welding work is improved. Starting the set flip motor can drive the output shaft and the turntable to perform flipping movement, and the flip frame connected to the turntable can drive the battery box to flip. The set base and support box can provide a stable working environment for the equipment.

[0006] This application can drive the battery box to flip and achieve multi-angle welding, but it does not solve the problem of how to clamp the battery box to avoid deformation when the battery box is thin.

[0007] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0008] The purpose of the present invention is to provide a battery box welding device that can effectively solve the above-mentioned technical problems.

[0009] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0010] A battery box welding device, comprising: a machine platform, a battery box body, and a battery box bottom plate;

[0011] An external clamping assembly for fixing the battery box body, a flipping assembly for driving the battery box body to flip, a welding assembly for welding the battery box body, and a loading assembly for loading the battery box bottom plate;

[0012] The flip assembly includes: a suction cup for taking materials from the bottom plate of the battery box, a flip assembly for driving the battery box body to flip, and an internal clamping assembly for internally clamping the battery box body;

[0013] The external clamping assembly includes: a clamping plate for externally fixing the battery box body, a stopper fixedly mounted on the clamping plate, and a welding groove is provided on the clamping plate;

[0014] The inner clamping assembly includes: a fixed rod; a piston fixedly mounted on the fixed rod; a sleeve slidably mounted on the piston, as well as a fixed sleeve, a slider, a support member, and a second spring. The fixed sleeve is communicated with the sleeve, the fixed sleeve is slidably connected to the slider, the slider is fixedly connected to the support member, and the second spring is fixedly connected to the support member and the slider, respectively.

[0015] Furthermore, the inner clamping assembly also includes: a support base fixedly installed on the machine platform; a fixing rod fixedly installed on the support base, a limiting groove opened on the sleeve, a limiting block slidably connected to the limiting groove, a movable sleeve fixedly installed on the limiting block, and a power source fixedly installed on the fixing rod.

[0016] Furthermore, the power source output shaft passes through the fixed rod, the piston, and the sleeve in sequence, the movable sleeve is fixedly connected to the power source output shaft, and the movable sleeve is sleeved on the surface of the sleeve.

[0017] Furthermore, the loading assembly includes: a conveyor belt, a fixed seat, and a magnetic attraction component; the conveyor belt is fixedly installed on the surface of the machine platform, the conveyor belt is fixedly connected to the fixed seat, and the fixed seat is fixedly connected to the magnetic attraction component.

[0018] Further, the flip assembly includes: a plurality of groups of straight grooves and thread grooves formed on the inner surface of the sleeve, the straight grooves being alternately connected with the thread grooves;

[0019] Furthermore, an inclined groove is provided at the position where the straight groove and the threaded groove are connected, a spring 1 is abutted on the inclined groove, a push block is fixedly installed on the spring 1, a chamfer is provided on the surface of the push block, the push block is slidably connected to the slide groove, an elastic rope is fixedly installed on the push block, and the end of the elastic rope is fixedly connected to the end of the inclined groove.

[0020] Furthermore, the welding assembly includes: a welding robot, a laser welding head, and a nozzle; the welding robot is fixedly installed on the surface of the machine, the welding robot is fixedly connected to the laser welding head, the laser welding head is fixedly connected to the nozzle, and a hose is connected to the sleeve, and one end of the hose is connected to the nozzle.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a battery box welding device, wherein a support member clamps the battery box body from the inside, and a clamping plate clamps the battery box body from the outside. Under the action of the support member, the clamping plate can prevent the battery box body from being compressed and deformed, thereby achieving comprehensive clamping of the battery box body, fixing the battery box body, preventing the battery box body from shaking during welding and affecting the welding of the battery box body, and under the action of the support member, the clamping plate can prevent the battery box body from being damaged by clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0024] Figure 1 A schematic diagram of a battery box welding device according to the present invention;

[0025] Figure 2 A battery box welding device of the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0026] Figure 3 This is a schematic diagram of a feeding assembly of a battery box welding device of the present invention;

[0027] Figure 4 This is a schematic diagram of an outer clamping assembly of a battery box welding device of the present invention;

[0028] Figure 5 A schematic diagram of a clamping plate of a battery box welding device of the present invention;

[0029] Figure 6 A schematic diagram of a flip assembly of a battery box welding device according to the present invention;

[0030] Figure 7 It is a cross-sectional schematic diagram of a flip assembly of a battery box welding device of the present invention;

[0031] Figure 8 A battery box welding device of the present invention Figure 7 The enlarged schematic diagram of point B in the middle;

[0032] Fig. 9 A schematic diagram of a sleeve of a battery box welding device of the present invention;

[0033] Fig.10 A schematic cross-sectional view of a sleeve of a battery box welding device according to the present invention;

[0034] Fig.11 A battery box welding device of the present invention Fig.10 The enlarged schematic diagram at C in the middle;

[0035] Fig.12 A schematic diagram of a battery box of a battery box welding device according to the present invention.

[0036] In the figure: 1. machine; 2. flip assembly; 21. support seat; 22. power source; 23. limit groove; 24. limit plate; 25. movable sleeve; 26. suction cup; 27. fixed rod; 271. piston; 272. limit block; 273. spring three; 28. sleeve; 281. one-way valve; 282. straight groove; 283. threaded groove; 284. inclined groove; 285. spring one; 286. push block; 29. ​​inner clamping assembly; 291. fixed sleeve; 292. slider; 293. support member; 294. spring two; 3. outer clamping assembly; 31. linear moving module; 32. clamping plate; 321. welding groove; 33. stopper; 4. feeding assembly; 41. conveyor belt; 42. fixed seat; 43. magnetic suction member; 5. welding assembly; 51. welding manipulator; 52. laser welding head; 53. nozzle. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0038] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0039] like Figures 1 to 12 As shown, a battery box welding device of the present invention comprises: a machine 1, a battery box main body, and a battery box bottom plate; a loading robot is arranged on the surface of the machine 1, and the loading robot is used to grab and load the battery box main body; an external clamping component 3 for fixing the battery box main body, a flipping component 2 for driving the battery box main body to flip, a welding component 5 for welding the battery box main body, and a loading component 4 for loading the battery box bottom plate; the flipping component 2 comprises: a flipping component 2 for driving the battery box to flip, and an internal clamping component 29 for internally clamping the battery box main body.

[0040] Specifically, the loading component 4 loads the battery box bottom plate, and the loading robot sends the battery box body to the outer clamping component 3, fixes the battery box body through the outer clamping component 3 and the inner clamping component 29, and then welds the battery box body through the welding component 5. After welding, the battery box body is driven to rotate by the flipping component 2, and the battery box bottom plate is taken out, and finally the battery box body and the bottom plate are welded through the welding component 5, thereby realizing automated overall welding of the battery box, with low manual intervention and high welding efficiency.

[0041] Specifically, the battery box needs to be fixed during welding to avoid shaking during welding and affecting the welding effect. Therefore, the present application sets an external clamping assembly 3 and an internal clamping assembly 29 to fix the battery box. The external clamping assembly 3 includes: a linear motion module 31, a clamping plate 32, and a stopper 33; a linear motion module 31 is fixedly installed on the surface of the machine 1, and the linear motion module 31 is fixedly connected to the clamping plate 32. A welding groove 321 is provided on the clamping plate 32, and the clamping plate 32 is fixedly connected to the stopper 33. The above structure is fixed on the machine 1. It is said that there are two groups. When in use, the two groups of linear movable modules 31 drive the clamping plate 32 to move relative to each other, and perform preliminary fixation on the battery box body (the preliminary fixation is that the clamping plate 32 has a small force to fix the battery box body, and the battery box body will still shake under the action of external force, but under the preliminary fixing clamping force, the battery box body will not be deformed). At this time, the loading robot moves the battery box body axially along the linear movable module 31, so that the battery box body contacts the block 33, thereby achieving preliminary fixation and positioning of the battery box body.

[0042] However, since the battery box body is formed by bending a metal plate, it is relatively thin and is easily deformed, and it is difficult to completely restrict it only by the external clamping assembly 3. Therefore, after the battery box body is initially fixed by the external clamping assembly 3, an internal clamping assembly 29 is required for auxiliary fixation. The internal clamping assembly 29 includes: a support seat 21 fixedly mounted on the machine table 1; a fixing rod 27 fixedly mounted on the support seat 21, a piston 271 fixedly mounted on the fixing rod 27, a sleeve 28 slidably mounted on the piston 271, a limiting groove 23 provided on the sleeve 28, a limiting plate 24 slidably connected to the limiting groove 23, and a limiting plate 24 fixedly mounted on the limiting groove 23. The movable sleeve 25 on the positioning plate 24 is fixedly mounted on the power source 22 on the fixed rod 27. The output shaft of the power source 22 passes through the fixed rod 27, the piston 271, and the sleeve 28 in sequence. The movable sleeve 25 is fixedly connected to the output shaft of the power source 22. The movable sleeve 25 is sleeved on the surface of the sleeve 28, as well as the fixed sleeve 291, the slider 292, the support member 293, and the spring 294. The fixed sleeve 291 is connected to the sleeve 28, the fixed sleeve 291 is slidably connected to the slider 292, the slider 292 is fixedly connected to the support member 293, the spring 294 is respectively fixedly connected to the support member 293 and the slider 292, and the power source 22 can be selected as a hydraulic cylinder.

[0043] After the battery box body is initially fixed by the external clamping assembly 3, the power source 22 is started to drive the movable sleeve 25 to move, so that the limit plate 24 slides in the limit groove 23. When the limit plate 24 slides to one end of the limit groove 23, the movable sleeve 25 continues to move to drive the sleeve 28 to move, and at the same time, the piston 271 is relatively moved inside the sleeve 28, so that the piston 271 squeezes the gas inside the sleeve 28 to enter the fixed sleeve 291, and pushes the slider 292 to drive the support member 293 to extend, thereby realizing the internal clamping of the battery box body. When the support member 293 is clamped internally, the linear moving module 31 is synchronously started to drive the clamping plate 32 to continue to clamp the battery box body. When the support member 293 moves, it will squeeze the spring 294. The subsequent reset of the spring 294 can drive the support member 293 to reset.

[0044] That is to say, the support member 293 clamps the battery box body from the inside, and the clamping plate 32 clamps the battery box body from the outside. Under the action of the support member 293, the clamping plate 32 can prevent the battery box body from being compressed and deformed, thereby achieving comprehensive clamping of the battery box body. On the one hand, the battery box body can be fixed to avoid shaking of the battery box body during welding, which affects the welding of the battery box body. Under the action of the support member 293, the clamping plate 32 can prevent the battery box body from being damaged. On the other hand, the battery box body is driven to contact with the block 33 when the loading robot is loading, thereby achieving the positioning of the battery box body, thereby ensuring the welding accuracy of the battery box body.

[0045] In general, the present application clamps twice, externally and internally, and positions the battery box body during external clamping, while internally and externally clamping simultaneously, to avoid damaging the battery box by a single clamp, thereby ensuring the accuracy of welding the battery box body.

[0046] It should be noted that in the present application, the battery box body and the bottom plate are both placed at an angle, so that the weld on the body can be located at the top, which is convenient for manual observation of the welding condition. The welding groove 321 on the clamping plate 32 can control the welding assembly 5 to weld the weld on the side of the battery box body from the side when the weld on the battery box body is not placed at the top, thereby improving the welding success rate of the present application.

[0047] After the welding of the battery box body is completed, it is also necessary to weld the battery box bottom plate and the battery box body. At this time, the battery box bottom plate needs to be taken out. The battery bottom plate is loaded through the loading component 4, and then the battery bottom plate is taken out through the suction cup 26 and sent to the battery box body for welding. Specifically, the loading component 4 includes: a conveyor belt 41, a fixed seat 42, and a magnetic suction piece 43; a conveyor belt 41 is fixedly installed on the surface of the machine 1, the conveyor belt 41 is fixedly connected to the fixed seat 42, and the fixed seat 42 is fixedly connected to the magnetic suction piece 43. The magnetic suction piece 43 can be selected as a magnet.

[0048] The battery box bottom plate is installed on the fixing seat 42 through the magnetic suction part 43, and the battery box bottom plate is transported toward the battery box body through the conveyor belt 41. Through the setting of the fixing seat 42, the height of the battery box bottom plate and the battery box body can be guaranteed to be consistent, avoiding the error between the battery box body and the battery box body after the suction cup 26 takes the material, resulting in welding failure.

[0049] When it is necessary to remove materials from the battery box bottom plate, start the power source 22 to drive the movable sleeve 25 to continue moving, so that the suction cup 26 moves toward the battery box bottom plate, and the suction cup 26 absorbs the battery box bottom plate and moves under the action of the power source 22 to make the battery box bottom plate dock with the battery box body, thereby completing the removal of materials from the battery box bottom plate.

[0050] Specifically, when the movable sleeve 25 with the suction cup 26 takes materials, the sleeve 28 moves accordingly, and the spring three 273 is deformed at this time. Then the suction cup 26 completes the material taking. When the movable sleeve 25 with the suction cup 26 docks the battery bottom plate with the battery body, the spring three 273 gradually resets to prevent the sleeve 28 from moving the battery box body toward the power source 22, resulting in docking failure. When the power source 22 drives the movable sleeve 25 to move, on the one hand, it can drive the support member 293 to support and fix the battery box body from the inside of the battery box body to prevent the battery box body from being damaged by external clamping. On the other hand, it can take materials from the battery box bottom plate and directly dock it on the battery box body, saving positioning time and improving welding efficiency.

[0051] It is further supplemented that a ball bearing can be provided on the side of the support member 293 that contacts the battery box body, so as to ensure the freedom of movement of the sleeve 28 while ensuring the supporting force.

[0052] Since the parts to be welded on the battery box are different and multiple welding is required, the battery box needs to be flipped when welding. The flip assembly 2 includes: multiple groups of straight grooves 282 and threaded grooves 283 are opened on the inner surface of the sleeve 28, and the straight grooves 282 and the threaded grooves 283 are alternately connected. When the movable sleeve 25 drives the sleeve 28 to move, the piston 271 moves in the straight groove 282 through the limit block 272. When it is necessary to drive the battery box body to rotate, the movable sleeve 25 is controlled by the power source 22 to continue to drive the sleeve 28 to move linearly, so that the limit block 272 moves to the inclined groove 284, and then rotates. The sleeve 28 is inserted into the threaded groove 283, and under the limitation of the threaded groove 283 and the inclined groove 284, the sleeve 28 is rotated, and the battery box body is driven to rotate through the support 293, thereby changing the welding position to facilitate the welding of the welding assembly 5. That is to say, when the suction cup 26 takes the material, it can drive the battery box body to rotate, so that after the battery box body is welded once, when the battery box body and the battery box bottom plate are welded, it can avoid the subsequent welding position being adjacent to the weld on the battery box body, thereby realizing the displacement when welding the battery box bottom plate, avoiding the melting point of the weld and reducing the weld quality.

[0053] Please refer to the instruction manual Fig.12 When the battery box body is welded, the weld is X. The suction cup 26 takes the material to flip the battery box body. Then, when welding between the battery box bottom plate and the battery box main body, the weld is Y. However, the weld X rotates and does not contact the weld Y. There will be no single weld continuous welding, resulting in poor weld quality. Then, weld O, weld I, and weld Z are welded in sequence to complete the welding of the entire battery box.

[0054] In addition, in order to ensure that the limit block 272 can stably move from the straight groove 282 to the threaded groove 283, an inclined groove 284 is provided at the connecting position between the straight groove 282 and the threaded groove 283, and a spring 285 is abutted on the inclined groove 284. A push block 286 is fixedly installed on the spring 285. The surface of the push block 286 is provided with a chamfer. The push block 286 is slidably connected with the slide groove. An elastic rope is fixedly installed on the push block 286. The end of the elastic rope is fixedly connected to the end of the inclined groove 284. The depth of the inclined groove 284 gradually increases from the direction of the power source 22 to the direction of the bottom plate of the battery box. When the limit block 272 moves inside the straight groove 282, it drives the push block 286 to move in the inclined groove 284, so that the limit block 272 can push the push block 286 when moving. The push block 286 moves inside the inclined groove 284 and causes the elastic rope to deform under force. At the same time, the push block 286 enters the inclined groove 284 under the guidance of the inclined surface of the inclined groove 284. At this time, the limit block 272 contacts the chamfered surface on the push block 286. Under the action of the chamfered surface, the push block 286 is squeezed to cause the spring 1 285 to contract, so that the limit block 272 moves normally. Then the spring 1 285 and the elastic rope are reset to drive the push block 286 to reset respectively, and pull the push block 286 to move upward, so that when the limit block 272 moves from the straight groove 282 toward the power source 22, it is blocked by the push block 286 and enters the threaded groove 283, ensuring the effect of driving the battery box body to rotate and replace the welding position, and ensuring the stability of the present application when replacing the welding surface.

[0055] It should be noted that when the piston 271 moves to the middle of the straight groove 282, the positive pressure chamber and the negative pressure chamber are connected through the threaded groove 283, but the piston 271 moves quickly, and the number of limit blocks 272 is the same as the number of straight grooves 282 to ensure the sealing effect.

[0056] Finally, the welding assembly 5 of the present application includes: a welding manipulator 51, a laser welding head 52, and a nozzle 53; a welding manipulator 51 is fixedly installed on the surface of the machine 1, the welding manipulator 51 is fixedly connected to the laser welding head 52, the laser welding head 52 is fixedly connected to the nozzle 53, the nozzle 53 blows air in the direction of the laser welding head 52, a hose is connected to the positive pressure chamber of the sleeve 28, one end of the hose is connected to the nozzle 53, when in use, the movable sleeve 25 moves to drive the suction cup 26 to pick up materials or the movable sleeve 25 moves to drive the battery box body to flip, the gas in the positive pressure chamber can be squeezed to be discharged to the laser welding machine head through the nozzle 53, that is, after each welding is completed, the nozzle 53 will spray air to the laser welding head 52 for dust removal to avoid dust adhering to the laser welding head 52 and affecting the use effect of the laser welding head 52, a one-way valve 281 is fixedly installed on the sleeve 28, which can inhale gas from outside the sleeve 28 to ensure the pressure in the positive pressure chamber.

[0057] In general, the present application realizes internal support of the battery box body by controlling the movement of the power source 22, and can also realize the flipping of the battery box during welding, so that during welding, the material can be taken from the bottom plate of the battery box, and the jet cleaning of the laser welding machine head is interspersed in the welding gap to ensure the cleaning effect of the laser welding head 52.

[0058] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0059] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A battery box welding device, characterized in that: include: Machine, battery box body, battery box bottom plate; An external clamping assembly for fixing the battery box body, a flipping assembly for driving the battery box body to flip, a welding assembly for welding the battery box body, and a loading assembly for loading the battery box bottom plate; The flip assembly includes: a suction cup for taking materials from the bottom plate of the battery box, a flip assembly for driving the battery box body to flip, and an internal clamping assembly for internally clamping the battery box body; The external clamping assembly includes: a clamping plate for externally fixing the battery box body, a stopper fixedly mounted on the clamping plate, and a welding groove is provided on the clamping plate; The inner clamping assembly includes: a fixed rod; a piston fixedly mounted on the fixed rod; a sleeve slidably mounted on the piston, as well as a fixed sleeve, a slider, a support member, and a second spring. The fixed sleeve is communicated with the sleeve, the fixed sleeve is slidably connected to the slider, the slider is fixedly connected to the support member, and the second spring is fixedly connected to the support member and the slider, respectively.

2. A battery box welding device as claimed in claim 1, characterized in that: The inner clamping assembly also includes: a support base fixedly installed on the machine platform; a fixing rod fixedly installed on the support base, a limiting groove provided on the sleeve, a limiting block slidably connected to the limiting groove, a moving sleeve fixedly installed on the limiting block, and a power source fixedly installed on the fixing rod.

3. A battery box welding device as claimed in claim 2, characterized in that: The power source output shaft passes through the fixed rod, the piston and the sleeve in sequence; the movable sleeve is fixedly connected to the power source output shaft, and the movable sleeve is sleeved on the surface of the sleeve.

4. A battery box welding device as claimed in claim 1, characterized in that: The feeding assembly comprises: a conveyor belt, a fixed seat, and a magnetic attraction piece; the conveyor belt is fixedly installed on the surface of the machine platform, the conveyor belt is fixedly connected to the fixed seat, and the fixed seat is fixedly connected to the magnetic attraction piece.

5. A battery box welding device as claimed in claim 1, characterized in that: The flip assembly includes: a plurality of groups of straight grooves and thread grooves opened on the inner surface of the sleeve, and the straight grooves are alternately connected with the thread grooves.

6. A battery box welding device as claimed in claim 5, characterized in that: An oblique groove is provided at the position where the straight groove and the threaded groove are connected, a spring 1 is abutted on the oblique groove, a push block is fixedly installed on the spring 1, a chamfer is provided on the surface of the push block, the push block is slidably connected to the slide groove, an elastic rope is fixedly installed on the push block, and an end of the elastic rope is fixedly connected to an end of the oblique groove.

7. A battery box welding device as claimed in claim 1, characterized in that: The welding assembly includes: a welding robot, a laser welding head, and a nozzle; the welding robot is fixedly installed on the surface of the machine, the welding robot is fixedly connected to the laser welding head, the laser welding head is fixedly connected to the nozzle, and a hose is connected to the sleeve, and one end of the hose is connected to the nozzle.

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