Battery tray welding apparatus based on deformation correction structure

Abstract

The present application relates to the technical field of battery tray welding, and particularly relates to a battery tray welding device based on a deformation correction structure, which comprises a mounting seat, a turnover fixing assembly arranged on the mounting seat to correct and clamp the battery tray, two groups of rotating rings, a conveying assembly two arranged between the rotating rings to correct the battery tray, conveying assembly one and conveying assembly three arranged on the two sides of the mounting seat and having the same structure, and a welding mechanical arm arranged on the mounting seat to perform multi-angle welding on the battery tray in cooperation with the turnover fixing assembly. The present application realizes the automatic feeding and discharging of battery trays of different sizes and the precise deviation-preventing positioning of the battery trays in a specified welding area by means of the conveying assembly, the photoelectric sensor and the control panel, and the battery trays are fixed by multi-point correction extrusion in cooperation with the turnover fixing assembly, and each fixing point can be individually deviated away from the welding area during welding to optimize the space and ensure the welding stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery tray welding, in particular to a battery tray welding device based on a deformation correction structure. BACKGROUND

[0002] The core of new energy electric vehicles is automobile power batteries, which belong to the category of chemical batteries and are mainly divided into the following three types: primary batteries, also known as dry batteries, which cannot be charged, such as alkaline batteries commonly used in daily life; secondary batteries, which are rechargeable batteries, and the basic requirement that automobile power batteries must meet is rechargeability; fuel cells, which do not contain active materials in the positive and negative electrodes, and active materials are continuously added from the outside, such as hydrogen fuel cells.

[0003] In new energy vehicles, batteries are loaded in trays, and the trays are installed on the vehicle to provide power for driving, such as a welding fastening device for producing a battery tray disclosed in CN117961354A, which adopts a fastening frame that slides in the processing table, and uses the self-weight of the battery tray to extrude the pressing plate and move the clamping block to realize the edge clamping and fixing of the battery tray.

[0004] However, this fixing method is only suitable for fixing the pressing plate below the battery tray, and the deflection angle of the fastening frame cannot be too large. Once the deflection angle of the fastening frame is too large, the self-weight of the battery tray will mainly act on the clamping block at the lowest position, thereby moving the pressing plate to cause the battery tray to partially lift out of the fastening frame.

[0005] In addition, when the battery tray is turned over by 180°, the self-weight of the battery tray cannot act on the pressing plate, thereby making it difficult to achieve effective and stable fixing effect at large deflection angle, causing the placement position of the battery tray to deviate, and making it difficult to achieve high-precision welding. Therefore, a solution is proposed. SUMMARY

[0006] The purpose of the present application is to provide a battery tray welding device based on a deformation correction structure to solve the above technical defects.

[0007] The purpose of the present application can be achieved by the following technical solution: a battery tray welding device based on a deformation correction structure, comprising a mounting seat and a turnover fixing assembly arranged on the mounting seat for correcting and clamping the battery tray;

[0008] The turnover fixing assembly comprises two groups of rotating rings, a conveying assembly two for correcting the battery tray is arranged between the rotating rings, a conveying assembly one and a conveying assembly three with the same structure are arranged on both sides of the mounting seat, and a welding mechanical arm for multi-angle welding of the battery tray is arranged on the mounting seat in cooperation with the turnover fixing assembly.

[0009] Preferably, the rotating ring is rotatably installed on the top of the mounting base, and a gear ring is fixedly connected to the outer wall of the rotating ring; a rotating rod is rotatably connected to the mounting base, and a gear is fixedly connected to the rotating rod and engaged with the corresponding gear ring; and a first servo motor is installed on the mounting base to drive the rotating rod to rotate.

[0010] Preferably, the movable frame is provided between the rotating rings, and an electric push rod and a guide sleeve rod are fixedly installed between the movable frame and the corresponding rotating ring.

[0011] Preferably, a plurality of adjusting plates in the shape of a mouth are slidably connected to the movable frame, a plurality of bolts are threadedly connected to the movable frame and abut against the corresponding adjusting plates, an L-shaped seat is fixedly connected to the adjusting plate, and a support is slidably installed on the L-shaped seat and boltedly connected to the corresponding correction clamping block.

[0012] Preferably, a second electric push rod is fixedly installed on the L-shaped seat, and the push rod end of the second electric push rod is rotatably connected to the support; an L-shaped guide groove is formed in the L-shaped seat; and a guide pin and a guide pin are fixedly connected to the support and slidably connected to the guide groove.

[0013] Preferably, a plurality of auxiliary rollers are rotatably connected to the inner top of the correction clamping block located on the long side of the movable frame.

[0014] Preferably, the conveying assembly two comprises a fixed frame fixedly connected between the rotating rings, a plurality of conveying rollers are equidistantly rotatably connected in the fixed frame, chain wheels are fixedly installed on the two side roller shafts of the conveying rollers, the chain wheels on adjacent two groups of conveying rollers are drivingly connected through chains, and a second servo motor is installed on the fixed frame to drive the corresponding conveying rollers to rotate.

[0015] Preferably, a guide disc in the shape of a conical frustum is symmetrically slidably connected to the two sides of the conveying roller, a bolt is threadedly connected to the guide disc and abuts against the conveying roller, and the guide discs on multiple groups of conveying rollers are distributed in the shape of a horn.

[0016] Preferably, the conveying assembly one comprises a mounting frame provided on one side of the mounting base, a plurality of conveying rollers are equidistantly rotatably connected in the mounting frame, chain wheels are fixedly installed on the two side roller shafts of the conveying rollers, the chain wheels on adjacent two groups of conveying rollers are drivingly connected through chains, and a third servo motor is installed on the mounting frame to drive the corresponding conveying rollers to rotate.

[0017] Preferably, a mounting block is boltedly installed on the bottom of the movable frame close to one side of the conveying assembly three, a photoelectric sensor is embeddedly installed on the mounting block, and a control panel is fixedly installed on the mounting base.

[0018] The beneficial effects of the present application are as follows:

[0019] (1) The present application realizes the automatic feeding and discharging of the battery tray through the conveying roller in the conveying assembly one / three and the conveying roller in the conveying assembly two, further improves the convenience in the welding process, and then drives multiple adaptive correction clamping blocks to engage with the side wall of the battery tray through the movable frame, realizes stable pressing and fixing of the battery tray, and can assist in correcting the deformed tray side wall, thereby improving the welding quality;

[0020] In addition, the independent control of multiple adaptive correction clamping blocks enables the welding mechanical arm to deviate from the welding area while not affecting the welding stability during the welding process of the battery tray, so as to optimize the space expansion of the welding area, and realize the effect of comprehensive welding processing by allowing the battery tray to be deviated through the rotation ring.

[0021] (2) The present application also realizes step-by-step correction and center conveying of the moving battery tray through the distance-adjustable guide disc on the conveying roller and the horn-shaped distribution of multiple guide discs, and combines the position-adjustable photoelectric sensor to collect data of the battery tray moving to the specified position, so as to control the start and stop of the servo motor in the control panel to achieve positioning and conveying of battery trays of different sizes, thereby ensuring the accurate clamping of multiple correction clamping blocks and the battery tray, and realizing the accuracy of battery tray fixing and deformation correction. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described below with reference to the accompanying drawings;

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a structural schematic diagram of the conveying assembly one of the present application;

[0025] Figure 3 is a cooperation schematic diagram of the turnover fixing assembly and the conveying assembly two of the present application;

[0026] Figure 4 is an installation schematic diagram of the turnover fixing assembly of the present application;

[0027] Figure 5 is a structural schematic diagram of the turnover fixing assembly of the present application;

[0028] Figure 6 is an installation schematic diagram of the correction clamping block of the present application;

[0029] Figure 7 is a structural schematic diagram of the conveying assembly two of the present application;

[0030] Figure 8 is a distribution schematic diagram of multiple guide discs of the present application.

[0031] Legend:

[0032] 1, mounting seat; 11, welding robot; 12, control panel;

[0033] 2, turnover fixing assembly; 21, rotating ring; 22, movable frame; 23, electric push rod I; 24, correction block; 25, adjusting plate; 26, L-shaped seat; 27, support; 28, electric push rod II; 29, guide groove; 210, guide pin I; 211, guide pin II; 212, mounting block;

[0034] 3, conveying assembly II; 31, fixed frame; 32, conveying roller; 33, guide disc;

[0035] 4, conveying assembly I; 41, mounting frame; 42, conveying roller; 5, conveying assembly III. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] Embodiment one: please refer to Figures 1-7 As shown, in order to solve the problem that it is difficult to effectively and stably fix the battery tray when the battery tray is deflected at a large angle for welding in the prior art, causing the position of the battery tray to deviate when deflected for welding, and high-precision welding processing cannot be achieved, the following scheme can be used to solve the problem.

[0038] The battery tray welding equipment based on the deformation correction structure in the embodiment includes a mounting seat 1 and a turnover fixing assembly 2 arranged on the mounting seat 1 to correct and clamp the battery tray. The turnover fixing assembly 2 includes two groups of rotating rings 21. A conveying assembly II 3 for correcting the battery tray is arranged between the rotating rings 21. The two sides of the mounting seat 1 are respectively provided with a conveying assembly I 4 and a conveying assembly III 5 which have the same structure.

[0039] The conveying assembly I 4, the conveying assembly II 3, and the conveying assembly III 5 can realize automatic feeding and discharging of the battery tray for welding, further improving the convenience in the welding process. The conveying assembly II 3 cooperates with the turnover fixing assembly 2 to realize one-sided extrusion fixing of the battery tray.

[0040] The welding mechanical arm 11 for multi-angle welding of the battery tray is arranged on the mounting seat 1 in cooperation with the flip fixing assembly 2. The battery tray is driven to deflect at any angle by the flip fixing assembly 2, so that stable fixation and multi-angle welding processing can be realized.

[0041] The rotating ring 21 is rotatably installed on the top of the mounting seat 1, and a gear ring is fixedly connected to the outer wall of the rotating ring 21. A rotating rod is rotatably connected to the mounting seat 1, and a gear meshing with the corresponding gear ring is fixedly connected to the rotating rod. A first servo motor is installed on the mounting seat 1 to drive the rotating rod to rotate. During welding, the fixed battery tray is driven to deflect by the first servo motor driving the rotating rod to rotate in combination with the meshing of the gears on both sides with the corresponding gear rings, and multi-angle welding processing is realized in cooperation with the welding mechanical arm 11.

[0042] The movable frame 22 is arranged between the rotating rings 21, and an electric push rod one 23 and a guide sleeve rod are fixedly installed between the movable frame 22 and the corresponding rotating ring 21. The guide sleeve rod is used to further limit the stability of the movement direction of the movable frame 22. A plurality of correction clamping blocks 24 adapted to the side walls of the battery tray are arranged on the movable frame 22.

[0043] The movable frame 22 is driven to move by the electric push rod one 23, and the movable frame 22 carries a plurality of adapted correction clamping blocks 24 to be clamped with the side walls of the battery tray. While realizing stable pressing and fixing of the battery tray, the side walls of the tray that have been deformed can be assisted to correct, thereby improving the welding quality.

[0044] A plurality of adjusting plates 25 in the shape of a mouth are slidably connected to the movable frame 22, which are used to correct and fix the side walls around the battery tray. Screws are threadedly connected to the movable frame 22 and abut against the corresponding adjusting plates 25. By moving the adjusting plates 25 and locking their positions by the screws, the positions of the correction clamping blocks 24 can be changed, so that the correction and fixing of battery trays of different sizes can be realized.

[0045] An L-shaped seat 26 is fixedly connected to the adjusting plate 25, and a support 27 screw-connected to the corresponding correction clamping block 24 is slidably installed on the L-shaped seat 26. The correction clamping block 24 can be disassembled and installed, so that the correction clamping block 24 adapted to the shape of the side wall of the battery tray can be selected, thereby improving the deformation correction effect.

[0046] An electric push rod two 28 is fixedly installed on the L-shaped seat 26. The plurality of adapted correction clamping blocks 24 are independently controlled by the corresponding electric push rod two 28. During the welding process of the welding mechanical arm 11 to the battery tray, the welding stability can be not affected, and the individual deflection away from the welding area can be realized to optimize the space expansion of the welding area.

[0047] And the push rod end of the electric push rod two 28 is rotationally connected with the support 27, the L-shaped seat 26 is provided with an L-shaped guide slot 29, the support 27 is fixedly connected with a guide pin one 210 and a guide pin two 211 which are slidably connected with the guide slot 29, the electric push rod one 23 drives the movable frame 22 to move downward in combination with the guide sleeve rod, so that the plurality of correction clamping blocks 24 distributed in the form of a mouth on the movable frame 22 move downward;

[0048] Until the plurality of correction clamping blocks 24 are clamped with the side wall of the battery tray, the material is supported by the plurality of conveying rollers 32, the battery tray is adaptively extruded and fixed, and the plurality of correction clamping blocks 24 are clamped with the side wall of the battery tray, so that the side wall which is deformed can be simultaneously corrected, and then the battery tray is welded by the welding mechanical arm 11;

[0049] In the welding process, the support 27 carrying the correction clamping block 24 is separated from the battery tray by the extension movement of the push rod of the corresponding electric push rod two 28, the guide slot 29 guides the guide pin one 210 and the guide pin two 211, so that the support 27 carrying the correction clamping block 24 is separated from the battery tray, and then when the guide pin two 211 enters the inclined section of the L-shaped guide slot 29, the support 27 carrying the correction clamping block 24 is deflected, and then moves away from the welding area of the battery tray of the welding mechanical arm 11, the space of the welding area is expanded, so that the welding treatment is quickly completed.

[0050] The conveying assembly two 3 comprises a fixed frame 31 fixedly connected between the rotating rings 21, a plurality of conveying rollers 32 are equidistantly rotationally connected in the fixed frame 31, chain wheels are fixedly installed on both sides of the roller shafts of the conveying rollers 32, the chain wheels on adjacent two groups of conveying rollers 32 are transmissionally connected through chains, a second servo motor driving corresponding conveying rollers 32 to rotate is installed on the fixed frame 31, the second servo motor drives corresponding conveying rollers 32 to rotate in combination with the transmission of corresponding chain wheels and chains, so that the plurality of conveying rollers 32 are synchronously and uniformly rotated, the welded battery tray is conveyed to the conveying assembly three 5, and the conveying assembly three 5 is used for automatically discharging and conveying.

[0051] The conveying assembly one 4 comprises a mounting frame 41 arranged on one side of the mounting seat 1, a plurality of conveying rollers 42 are equidistantly rotationally connected in the mounting frame 41, chain wheels are fixedly installed on both sides of the roller shafts of the conveying rollers 42, the chain wheels on adjacent two groups of conveying rollers 42 are transmissionally connected through chains, and a third servo motor driving corresponding conveying rollers 42 to rotate is installed on the mounting frame 41;

[0052] During feeding, the third servo motor in the conveying assembly one 4 drives corresponding conveying rollers 42 to rotate in combination with the transmission of corresponding chain wheels and chains, so that the plurality of conveying rollers 42 are synchronously and uniformly rotated, and the battery tray placed on the conveying assembly one 4 is fed and conveyed, during discharging, the third servo motor in the conveying assembly three 5 drives corresponding conveying rollers 42 to rotate, and the welded battery tray is output.

[0053] Embodiment Two: Please refer to Figure 1 、 Figure 5 、 Figure 7 With Figure 8 As shown in the figure, positioning and conveying are carried out for different sizes of battery trays to ensure accurate fixing and deformation correction of the battery tray, which can be solved by the following scheme.

[0054] In this embodiment, a plurality of auxiliary rollers are rotatably connected to the inner top of the correction block 24 located on the long side of the movable frame 22. During the welding process, when the battery tray needs to be moved for a short distance, the electric push rod two 28 located on the front and rear sides of the battery tray is controlled to drive the correction block 24 to deflect away, the second servo motor drives the plurality of conveying rollers 32 to rotate, the battery tray is moved for a short distance, and the correction block 24 located on the long side of the movable frame 22 indirectly abuts against the battery tray through the auxiliary rollers, realizing stable fixing during short-distance movement.

[0055] The two sides of the conveying roller 32 are symmetrically and slidably connected with the guide disc 33 having a circular truncated cone structure, and the guide disc 33 is threadedly connected with the bolt abutting against the conveying roller 32. The guide discs 33 on the plurality of conveying rollers 32 are distributed in a trumpet shape.

[0056] When the battery tray moves on the top of the fixed frame 31, the guide discs 33 distributed in an eight shape on the conveying rollers 32 on one side of the conveying assembly one 4 are used to sequentially push, correct and center the battery tray, and then the guide discs 33 distributed in an = shape on the conveying rollers 32 on one side of the conveying assembly three 5 are used to maintain the centering conveying, so that the battery tray can be centered and conveyed without deviation, and the guide discs 33 with adjustable spacing on the conveying rollers 32 can realize positioning and conveying of battery trays of different sizes.

[0057] The mounting block 212 is bolted to the side of the bottom of the movable frame 22 close to the conveying assembly three 5, and the photoelectric sensor is embedded and mounted on the mounting block 212. The control panel 12 is fixedly installed on the mounting seat 1. The position of the battery tray is collected by the photoelectric sensor on the mounting block 212 until the side of the battery tray moves to the position directly below the photoelectric sensor.

[0058] The control signal collected by the photoelectric sensor is transmitted to the controller in the control panel 12, the controller generates a stop signal to control the second servo motor and the third servo motor to stop rotating, further completing the positioning and conveying of the battery tray, ensuring the accurate clamping of the plurality of correction blocks 24 and the battery tray, and realizing the accuracy of the fixing and deformation correction of the battery tray.

[0059] Embodiment Three: Please refer to Figures 1-8 As shown in the figure, the present application also provides a use method of the battery tray welding equipment based on the deformation correction structure, which comprises the following steps:

[0060] Step one: the third servo motor drives the corresponding conveying roller 42 to rotate, combined with the transmission of the corresponding sprocket and chain, drives multiple conveying rollers 42 to rotate synchronously and in the same direction, and the second servo motor drives the corresponding conveying roller 32 to rotate, combined with the transmission of the corresponding sprocket and chain, drives multiple conveying rollers 32 to rotate synchronously and in the same direction, and the battery tray on the conveying assembly one 4 is loaded and conveyed, and the battery tray is loaded between the fixed frame 31 and the movable frame 22;

[0061] Step two: during the movement of the battery tray on the fixed frame 31, first pass through the eight-shaped distribution of the guide disc 33 on the side of the conveying assembly one 4, the battery tray is pushed and corrected step by step, then pass through the =-shaped distribution of the guide disc 33 on the side of the conveying assembly three 5, the battery tray is maintained in the middle of the conveying, and then the position of the battery tray is collected by the photoelectric sensor on the mounting block 212, until the side of the battery tray moves to the position directly below the photoelectric sensor, the photoelectric sensor transmits the collected control signal to the controller in the control panel 12, the controller generates a stop signal to control the second servo motor and the third servo motor to stop rotating, and the positioning and conveying of the battery tray are completed;

[0062] Step three: the electric push rod one 23 drives the movable frame 22 to move downward in combination with the guide sleeve rod, so that multiple mouth-shaped distribution of the correction clamp block 24 on the movable frame 22 moves downward, until the correction clamp block 24 is engaged with the side wall of the battery tray, combined with the material supporting of multiple conveying rollers 32, the battery tray is adaptively extruded and fixed, and the multiple correction clamp blocks 24 can simultaneously correct the deformed side wall by engaging with the side wall of the battery tray, and then the battery tray is welded by the welding mechanical arm 11;

[0063] Step four: during the welding process, the first servo motor drives the rotating rod to rotate, the gear and the gear ring are engaged, and the fixed battery tray is deflected for multi-angle welding processing. In addition, the push rod of the corresponding electric push rod two 28 carries the support column 27 to extend and move, the L-shaped guide groove 29 guides the guide pin one 210 and the guide pin two 211, so that the support column 27 carries the correction clamp block 24 away from the battery tray, and then the guide pin two 211 enters the inclined section of the L-shaped guide groove 29, so that the support column 27 carries the correction clamp block 24 to deflect and further away from the welding area of the welding mechanical arm 11, so as to quickly complete the overall welding processing;

[0064] Step five: when the guide disc 33 blocks the welding area of the battery tray, the correction clamp block 24 on the front and rear sides of the battery tray is deflected away, the second servo motor drives multiple conveying rollers 32 to rotate, so that the fixed battery tray moves a short distance, so that the welding area is exposed, and the welding mechanical arm 11 assists in completing the welding processing;

[0065] Step six: after the completion of welding, the electric push rod 23 drives the movable frame 22 to move away from the battery tray and reset, the second servo motor drives the conveying roller 32 to rotate, and the welded battery tray is conveyed to the conveying assembly three 5 to be automatically discharged and conveyed.

[0066] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A battery tray welding device based on deformation correction structure, comprising a mounting seat (1) and a turnover fixing assembly (2) arranged on the mounting seat (1) for correcting and clamping the battery tray, characterized in that: the turnover fixing assembly (2) comprises two groups of rotating rings (21), a conveying assembly two (3) for correcting the battery tray is arranged between the rotating rings (21), and the same conveying assembly one (4) and conveying assembly three (5) are arranged on both sides of the mounting seat (1); a welding mechanical arm (11) for multi-angle welding of the battery tray is arranged on the mounting seat (1) and cooperates with the turnover fixing assembly (2); an active frame (22) is arranged between the rotating rings (21), and an electric push rod one (23) and a guide sleeve rod are fixedly installed between the active frame (22) and the corresponding rotating ring (21); a plurality of correction clamping blocks (24) matched with the side wall of the battery tray are arranged on the active frame (22); a plurality of adjusting plates (25) distributed in a mouth shape are slidably connected to the active frame (22), a bolt abutting against the corresponding adjusting plate (25) is threadedly connected to the active frame (22), an L-shaped seat (26) is fixedly connected to the adjusting plate (25), and a support column (27) screw-connected with the corresponding correction clamping block (24) is slidably installed on the L-shaped seat (26); an electric push rod two (28) is fixedly installed on the L-shaped seat (26), and the push rod end of the electric push rod two (28) is rotatably connected with the support column (27); an L-shaped guide groove (29) is formed in the L-shaped seat (26), and a guide pin one (210) and a guide pin two (211) are fixedly connected to the support column (27) and slidably connected with the guide groove (29).

2. The battery tray welding apparatus based on the shape correction structure according to claim 1, characterized by, The rotating ring (21) is rotatably installed on the top of the mounting seat (1), and a gear ring is fixedly connected to the outer wall of the rotating ring (21); a rotating rod is rotatably connected to the mounting seat (1), a gear meshing with the corresponding gear ring is fixedly connected to the rotating rod, and a first servo motor driving the rotating rod to rotate is installed on the mounting seat (1).

3. The strain correction structure-based battery tray welding apparatus according to claim 1, characterized by, A plurality of auxiliary rollers are rotatably connected to the inner top of the correction clamping block (24) on the long side of the active frame (22).

4. The strain correction structure-based battery tray welding apparatus according to claim 1, characterized by, The conveying assembly two (3) comprises a fixed frame (31) fixedly connected between the rotating rings (21), a plurality of conveying rollers (32) are equidistantly rotatably connected in the fixed frame (31), chain wheels are fixedly installed on the roller shafts on both sides of the conveying roller (32), the chain wheels on the adjacent two groups of conveying rollers (32) are drivingly connected through chains, and a second servo motor driving the corresponding conveying roller (32) to rotate is installed on the fixed frame (31).

5. The battery tray welding apparatus based on the shape correction structure according to claim 4, characterized by, The conveying rollers (32) are symmetrically slidably connected with guide discs (33) having a conical frustum structure in cross section, bolts abutting against the conveying rollers (32) are threadedly connected to the guide discs (33), and the guide discs (33) on the plurality of conveying rollers (32) are distributed in a horn shape.

6. The strain correction structure-based battery tray welding apparatus according to claim 1, characterized by, The conveying assembly one (4) comprises a mounting frame (41) arranged on one side of the mounting base (1), a plurality of conveying rollers (42) are rotationally connected in the mounting frame (41) at equal intervals, chain wheels are fixedly installed on both sides of the roller shafts of the conveying rollers (42), the chain wheels on the adjacent two groups of conveying rollers (42) are drivingly connected through chains, and the mounting frame (41) is provided with a third servo motor for driving the corresponding conveying rollers (42) to rotate.

7. The strain correction structure-based battery tray welding apparatus according to claim 1, characterized by, The bottom of the movable frame (22) is bolted with a mounting block (212) near one side of the conveying assembly three (5), an optical-electricity sensor is embeddedly arranged on the mounting block (212), and the mounting base (1) is fixedly provided with a control panel (12).

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