A welding tool for a lightweight battery rack of a new energy vehicle

Abstract

The application provides a welding tool for a lightweight battery frame of a new energy vehicle, and belongs to the technical field of welding processing of automobile parts. The welding tool comprises a turnover seat, a battery frame and a supporting seat are arranged above the turnover seat, a supporting plate and a processing platform are arranged above the supporting seat, the supporting plate is connected with a clamping assembly, the clamping assembly is used for preventing deformation of the battery frame during welding, the processing platform is connected with a bottom supporting assembly, and the bottom supporting assembly is used for fastening the battery frame. The application has the beneficial effects that the battery frame can be automatically aligned and positioned through the guide groove, the reset spring can absorb vibration load and impact load during clamping and welding of the battery frame, so that the clamping stability of the workpiece is improved, and the movable plate can follow thermal shrinkage and local deformation generated during the welding process to realize dynamic compensation, so that the battery frame is continuously supported and laterally constrained, and the welding quality is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts welding technology, and more specifically, to a welding fixture for a lightweight battery rack for new energy vehicles. Background Technology

[0002] New energy vehicle batteries are a new type of automotive battery that uses new energy technologies to reduce greenhouse gas emissions. They can be divided into two main categories: storage batteries and fuel cells. New energy vehicle battery packs consist of multiple batteries stacked in series. During the installation of new energy vehicle batteries, the batteries need to be neatly installed on battery brackets. Since the positions of the batteries need to be precisely arranged, the structural stability requirements of the automotive battery place high demands on the battery bracket structure. During the production of the battery bracket, it is necessary to ensure that the connections between the battery bracket structures are firm, and welding is often used to improve the strength of the connections.

[0003] Battery racks for new energy vehicles are typically composed of multiple welded profiles, forming a frame-like structure characterized by large spans, thin walls, and relatively low rigidity. During welding, to ensure weld position accuracy, welding fixtures are usually required for positioning and clamping. However, most existing welding fixtures use fixed support blocks, limiting plates, and clamping components for rigid positioning. While this structure achieves basic clamping, the battery rack is prone to thermal shrinkage, localized warping, and side beam deformation due to welding heat input. Existing positioning structures often struggle to provide continuous compensation, making it difficult for the fixture to promptly constrain deformed areas after deformation, thus affecting the overall dimensional accuracy and welding quality of the battery rack. Furthermore, the clamping and positioning mechanisms in existing fixtures are often independent, requiring operators to perform workpiece positioning and clamping operations separately. This not only increases the number of clamping steps but also increases the risk of pre-deformation of the workpiece due to uneven clamping force or clamping position deviations, further reducing welding accuracy. Therefore, inventing a welding fixture for lightweight battery racks in new energy vehicles to solve these problems has become a pressing issue for those skilled in the art. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a welding fixture for lightweight battery racks in new energy vehicles. It aims to solve the problems that most existing welding fixtures adopt fixed positioning structures, which make it difficult to continuously compensate for the thermal deformation of the battery rack during the welding process, easily causing warping of the battery rack side beams and dimensional deviations. In addition, existing positioning mechanisms and clamping mechanisms are difficult to coordinate and cooperate, usually requiring separate adjustment, resulting in low clamping efficiency and easy decline in workpiece positioning stability due to uneven clamping.

[0005] This invention is implemented as follows: This invention provides a welding fixture for a lightweight battery frame for new energy vehicles, including a flipping seat, a battery frame and a support seat above the flipping seat, a tray and a processing platform above the support seat, a clamping assembly connected to the tray to prevent deformation of the battery frame during welding, and a bottom support assembly connected to the processing platform to secure the battery frame.

[0006] Preferably, the flipping seat and the support seat are detachably connected. A motor is fixedly connected to the lower end of the support seat. One end of the motor passes through the side wall of the support seat and is fixedly connected to a drive gear. An annular groove is opened on the side wall of the support seat, and a number of circumferentially distributed rotating beads are rotatably connected to the inner wall of the annular groove.

[0007] Preferably, one end of the support plate is rotatably connected to the inner wall of the annular groove, the other end of the support plate is fixedly connected to an installation disk, and the side wall of the support plate is fixedly connected to a plurality of teeth arranged in a circumferential array, which mesh with the drive gear.

[0008] Preferably, the clamping assembly includes a fixing plate, one end of which is fixedly connected to the side wall of the support plate, and the other end of which is fixedly connected to a fixing frame. A baffle is slidably connected to the inner wall of the fixing frame, and an extension rod is provided on one side of the baffle.

[0009] Preferably, one end of the extension rod is fixedly connected to the baffle, the other end of the extension rod passes through the side wall of the fixed frame, and a telescopic spring is sleeved on the outer wall of the extension rod. The two ends of the telescopic spring are fixedly connected to the inner wall of the fixed frame and the side wall of the baffle, respectively.

[0010] Preferably, a movable plate is fixedly connected to one end of the extension rod located outside the fixed frame, and a roller is rotatably connected to the side of the movable plate away from the fixed frame.

[0011] Preferably, a connecting rod is rotatably connected to the side wall of the fixed plate, and a slot is provided at the end of the connecting rod away from the fixed plate. A turntable is fixedly connected to the end of the connecting rod located on the inner side of the fixed plate, and an extrusion block is fixedly connected to the outer wall of the turntable. The side of the extrusion block that slides against the baffle is arc-shaped.

[0012] Preferably, the base assembly includes a support plate, one end of which is fixedly connected to the processing platform. A guide groove is provided on the side wall of the support plate, and the upper end of the guide groove is V-shaped. A retaining seat is rotatably connected to the other end of the support plate. A side plate and a limiting strip are fixedly connected to the side wall of the processing platform. A fixing bolt is connected to the retaining seat, and an adjusting screw is threadedly connected to the side wall of the retaining seat. A clamping seat is rotatably connected to one end of the adjusting screw.

[0013] Preferably, the base assembly further includes a fixed seat, which is fixedly connected to the side wall of the support plate. A piston rod is slidably connected to the fixed seat. One end of the piston rod is provided with a return spring. The two ends of the return spring are fixedly connected to the inner wall of the fixed seat and the side wall of the piston rod, respectively. A horizontal plate is fixedly connected to the other end of the piston rod, and a toothed plate is fixedly connected to the side wall of the horizontal plate.

[0014] Preferably, the base support assembly further includes a vertical plate, one end of which is fixedly connected to the side wall of the processing platform. A rotating rod is rotatably connected to the side wall of the vertical plate. One end of the rotating rod is fixedly connected to a limiting block adapted to the slot, and the other end of the rotating rod is fixedly connected to a gear plate. The gear plate meshes with the gear plate.

[0015] The beneficial effects of this invention are: 1. This invention constitutes a bidirectional attitude adjustment mechanism by setting up a flipping seat, a support seat, a tray, a motor, a drive gear, and teeth. The flipping seat can drive the support seat and the battery frame as a whole to adjust the pitch angle, and the drive gear can drive the tray to rotate around its own axis, thereby realizing the attitude adjustment of the battery frame in different directions. This allows the battery frame to be quickly adjusted to a suitable welding angle according to the weld position, reducing welding dead angles and welding torch interference, and improving weld accessibility and welding quality.

[0016] 2. This invention constructs a bottom support buffer positioning mechanism by setting a guide groove, a support plate, a side plate, a limiting strip, a clamping seat, a piston rod, and a return spring. The guide groove can automatically guide and position the battery frame, the clamping seat can stably clamp the bottom of the battery frame, and the return spring can absorb vibration loads and impact loads during the battery frame clamping and welding process, thereby improving the workpiece clamping stability, reducing the impact of welding vibration transmitted to the tooling structure, and buffering and compensating for the slight displacement caused by welding thermal deformation, thus improving the positioning accuracy and dimensional consistency of the battery frame during the welding process.

[0017] 3. This invention comprises a linkage clamping compensation mechanism consisting of a toothed plate, a toothed disc, a rotating rod, a connecting rod, a turntable, a pressing block, a moving plate, and a telescopic spring. After the battery frame is placed, it can use its own weight to drive the toothed plate to move, and the toothed disc drives the clamping assembly to move automatically, causing the moving plate to move closer to the side of the battery frame, forming an auxiliary clamping force. At the same time, the telescopic spring and rollers enable the moving plate to dynamically compensate for the thermal shrinkage and local deformation generated during the welding process, thereby achieving continuous support and lateral constraint for the battery frame and improving the welding quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a welding fixture for a lightweight battery rack for new energy vehicles provided by an embodiment of the present invention. Figure 2 This is a schematic diagram of the bottom structure of the support base of a welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the battery frame structure of a welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the processing platform structure of a welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the base support assembly structure of a welding fixture for a lightweight battery rack for new energy vehicles, provided by an embodiment of the present invention. Figure 6 This invention provides a welding fixture for a lightweight battery rack for new energy vehicles. Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 This is a schematic diagram of the support plate and clamping component structure of a welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 8 This is a schematic diagram of the internal structure of the support base of a welding fixture for a lightweight battery rack for new energy vehicles, provided by an embodiment of the present invention. Figure 9 This is a schematic diagram of the lower end structure of the welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 10 This is a schematic diagram of the internal structure of the fixing frame of a welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 11 This is a partial cross-sectional view of the support plate of a welding fixture for a lightweight battery rack for new energy vehicles provided in an embodiment of the present invention. Figure 12 This is an initial structural diagram of the base support assembly of a welding fixture for a lightweight battery rack for new energy vehicles, provided by an embodiment of the present invention.

[0020] In the diagram: 1. Flip-over base; 2. Battery frame; 3. Support plate; 31. Tooth; 4. Support base; 41. Annular groove; 42. Ball bearing; 5. Motor; 6. Machining platform; 7. Base assembly; 71. Card holder; 72. Fixing bolt; 73. Support plate; 74. Guide groove; 75. Fixing base; 751. Piston rod; 752. Return spring; 76. Toothed plate; 77. Horizontal plate; 78. Clamping seat; 79. Adjusting screw 710. Gear plate; 711. Vertical plate; 712. Rotating rod; 7121. Limiting block; 8. Side plate; 9. Tightening assembly; 91. Connecting rod; 92. Slot; 93. Moving plate; 931. Roller; 94. Fixed frame; 95. Fixed plate; 96. Extension rod; 97. Baffle; 98. Turntable; 99. Pressing block; 910. Telescopic spring; 10. Limiting strip; 11. Mounting plate; 12. Drive gear. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Reference Figures 1-12 A welding fixture for a lightweight battery rack for new energy vehicles includes a flipping seat 1, a battery frame 2 and a support seat 4 on the flipping seat 1, a tray 3 and a processing platform 6 on the support seat 4, a clamping component 9 connected to the tray 3, the clamping component 9 being used to prevent deformation of the battery frame 2 during the welding process, and a bottom support component 7 connected to the processing platform 6, the bottom support component 7 being used to fasten the battery frame 2.

[0023] Furthermore, the flipping seat 1 and the support seat 4 are detachably connected. The lower end of the support seat 4 is fixedly connected to a motor 5. One end of the motor 5 passes through the side wall of the support seat 4 and is fixedly connected to a drive gear 12. The side wall of the support seat 4 is provided with an annular groove 41. The inner wall of the annular groove 41 is rotatably connected to a number of circumferentially distributed rotating beads 42. One end of the tray 3 is rotatably connected to the inner wall of the annular groove 41. The other end of the tray 3 is fixedly connected to a mounting plate 11. The side wall of the tray 3 is fixedly connected to a number of circumferentially distributed teeth 31. The teeth 31 are meshed with the drive gear 12.

[0024] It should be noted that: Before welding the battery frame 2, the spatial orientation of the battery frame 2 can be adjusted according to the position requirements of the part to be welded. The flipping seat 1 can drive the support seat 4 to rotate around the front and back direction to adjust the pitch angle of the battery frame 2. After starting the motor 5, the motor 5 outputs torque to drive the drive gear 12 to rotate. The drive gear 12 meshes with the teeth 31 set on the side wall of the support plate 3, thereby driving the support plate 3 to rotate around its own axis. Since the teeth 31 are evenly distributed around the circumference of the support plate 3, the drive gear 12 can always maintain a stable meshing state during the process of driving the support plate 3 to rotate, avoiding tooth skipping, slippage and angle deviation, so that the support plate 3 can achieve continuous and precise angle adjustment.

[0025] During the rotation of the pallet 3, one end of it always maintains a mating relationship with the annular groove 41. The multiple rotating beads 42 evenly distributed inside the annular groove 41 can form a ring-shaped rolling support structure, so that the load generated by the battery frame 2 is evenly distributed on the multiple rotating beads 42, avoiding excessive local stress on the pallet 3 and deformation. At the same time, while providing rolling support, the rotating beads 42 can also form a radial limit on the pallet 3, so that the pallet 3 remains stable during rotation, reducing the occurrence of swaying, thereby ensuring that the battery frame 2 still has good positioning accuracy in the flipped state. The flipping seat 1 and the pallet 3 provide attitude adjustment capabilities in two directions, so that the battery frame 2 can be adjusted to the optimal welding posture according to different weld positions, so that the weld is as close as possible to the horizontal welding or boat-shaped welding position, reducing vertical welding and overhead welding conditions, and improving the weld formation quality. The mounting plate 11 is fixedly connected to the processing platform 6 by multiple bolts, which not only improves the structural stability of the pallet 3 during rotation, but also enhances the overall load-bearing capacity, so that the battery frame 2 always maintains reliable support during flipping and welding, and improves welding accuracy.

[0026] Reference Figure 4 , Figure 5 , Figure 6 , Figure 11 and Figure 12Furthermore, the base support assembly 7 includes a support plate 73, one end of which is fixedly connected to the processing platform 6. A guide groove 74 is provided on the side wall of the support plate 73, with the upper end of the guide groove 74 forming a "V" shape. A retainer 71 is rotatably connected to the other end of the support plate 73. A side plate 8 and a limiting strip 10 are fixedly connected to the side wall of the processing platform 6. A fixing bolt 72 is connected to the retainer 71, and an adjusting screw 79 is threadedly connected to the side wall of the retainer 71. A clamping seat 78 is rotatably connected to one end of the adjusting screw 79. The base support assembly 7 also includes a fixed seat 75, which is fixedly connected to the side wall of the support plate 73. A piston rod 751 is slidably connected to the fixed seat 75. One end of the piston rod 751 is provided with a return spring 752. The two ends of the return spring 752 are fixedly connected to the inner wall of the fixed seat 75 and the side wall of the piston rod 751, respectively. The other end of the piston rod 751 is fixedly connected to a horizontal plate 77. The side wall of the horizontal plate 77 is fixedly connected to a toothed plate 76. The base support assembly 7 also includes a vertical plate 711. One end of the vertical plate 711 is fixedly connected to the side wall of the processing platform 6. The side wall of the vertical plate 711 is rotatably connected to a rotating rod 712. One end of the rotating rod 712 is fixedly connected to a limiting block 7121 that matches the slot 92. The other end of the rotating rod 712 is fixedly connected to a toothed disc 710. The toothed disc 710 is meshed with the toothed plate 76.

[0027] It should be noted that: When clamping the battery frame 2, the lower frame beam of the battery frame 2 is first placed in the guide groove 74 at the top of the support plate 73. Since the upper end of the guide groove 74 has a V-shaped structure, when there is a certain deviation in the placement of the battery frame 2, the frame beam can automatically slide towards the center position along the guide surfaces on both sides of the guide groove 74 under its own gravity, thereby achieving automatic left-right alignment, improving workpiece loading efficiency and positioning accuracy. After completing the left-right positioning, the side of the battery frame 2 contacts the side plate 8, and the front-back direction is restricted by the limiting strip 10, thus achieving the initial positioning of the battery frame 2 in the horizontal plane. Then, the clamping seat 71 is rotated to the preset clamping position, and the clamping is then used... The fixing bolt 72 locks the clamping seat 71 onto the support plate 73 to ensure that the clamping seat 71 will not shift during subsequent clamping. Continue to rotate the adjusting screw 79, and push the clamping seat 78 gradually closer to the bottom of the battery frame 2 through the transmission action of the threaded pair until the clamping seat 78 is in close contact with the bottom beam of the frame. Since the clamping seat 78 is made of elastic rubber, it can form a flexible contact state during the clamping process. This not only avoids the local area of ​​the lightweight battery frame 2 from being rigidly squeezed and causing indentations or damage, but also increases the contact area, improves clamping stability and force uniformity. The elastic rubber is high-temperature resistant nitrile rubber or polyurethane rubber to adapt to the heat radiation during the welding process.

[0028] After clamping seat 78 completes clamping, battery frame 2 is constrained in the left-right, front-back, and vertical directions, thus forming a stable and reliable three-dimensional positioning state, providing an accurate clamping reference for subsequent welding processing. Furthermore, during the placement of battery frame 2 on support plate 73, its own weight will press horizontal plate 77 downwards. Horizontal plate 77 drives piston rod 751 to slide inside fixed seat 75, while simultaneously compressing return spring 752 to store elastic potential energy. Since horizontal plate 77 remains above the bottom of guide groove 74 under pressure, a certain buffer stroke is always maintained below it. When the welding robot... When the battery frame 2 is welded, the welding current, the movement of the welding torch, and the heat input can easily cause the battery frame 2 to vibrate and be subjected to impact loads. At this time, the return spring 752 absorbs part of the vibration energy through elastic deformation and drives the horizontal plate 77 to generate a slight buffer displacement through the piston rod 751, thereby reducing the transmission of vibration to the processing platform 6 and the support structure and improving the positioning stability during the welding process. At the same time, when the welding heat causes the battery frame 2 to undergo slight thermal expansion, the piston rod 751 can make compensatory movements within the fixed seat 75, reducing the transmission of thermal stress to the tooling structure and further improving the welding dimensional accuracy.

[0029] Example 2 Reference Figure 4 , Figure 7 and Figure 10 Furthermore, the clamping assembly 9 includes a fixing plate 95, one end of which is fixedly connected to the side wall of the support plate 3, and the other end of which is fixedly connected to a fixing frame 94. A baffle 97 is slidably connected to the inner wall of the fixing frame 94, and an extension rod 96 is provided on one side of the baffle 97. One end of the extension rod 96 is fixedly connected to the baffle 97, and the other end of the extension rod 96 passes through the side wall of the fixing frame 94. A telescopic spring 910 is sleeved on the outer wall of the extension rod 96, and the two ends of the telescopic spring 910 are respectively connected to the inner wall of the fixing frame 94 and the baffle. The side wall of 97 is fixedly connected; the end of the extension rod 96 located outside the fixed frame 94 is fixedly connected to the movable plate 93, and the side of the movable plate 93 away from the fixed frame 94 is rotatably connected to the roller 931; the side wall of the fixed plate 95 is rotatably connected to the connecting rod 91, the end of the connecting rod 91 away from the fixed plate 95 is provided with a slot 92, the end of the connecting rod 91 located inside the fixed plate 95 is fixedly connected to the turntable 98, the outer wall of the turntable 98 is fixedly connected to the pressing block 99, and the side of the pressing block 99 that slides against the baffle 97 is arc-shaped.

[0030] It should be noted that: When the battery frame 2 is placed on the support plate 73 and continues to press down on the horizontal plate 77, the horizontal plate 77 drives the piston rod 751 to move into the fixed seat 75, causing the toothed plate 76 to generate a linear displacement synchronously. Since the toothed plate 76 and the toothed disk 710 are engaged, the toothed plate 76 will drive the toothed disk 710 to rotate synchronously when it moves. The toothed disk 710 further drives the rotating rod 712 to rotate around its own axis. The limiting block 7121 set at one end of the rotating rod 712 will connect with the slot 92 on the connecting rod 91 when the processing platform 6 is installed, so as to realize the insertion and engagement between the limiting block 7121 and the slot 92.

[0031] Under the continuous rotation of the limiting block 7121, the connecting rod 91 rotates around the fixed plate 95 and drives the turntable 98 fixedly connected to it to rotate synchronously. When the turntable 98 rotates, the extrusion block 99 set on its outer wall gradually approaches the baffle 97 and forms a continuous rolling contact with the baffle 97 by utilizing the arc extrusion surface. Since the extrusion block 99 and the baffle 97 adopt an arc transition structure, the force can be applied smoothly during the rotation of the turntable 98, avoiding impact loads, thereby pushing the baffle 97 to slide smoothly along the inside of the fixed frame 94. When the baffle 97 moves, it drives the extension rod 96 to extend synchronously and compresses the telescopic spring 910 at the same time.

[0032] As the extension rod 96 extends outward, the movable plate 93 connected to its end gradually approaches the bottom side beam of the battery frame 2 until the roller 931 on the movable plate 93 contacts the bottom frame of the battery frame 2. Because the roller 931 has a rotatable structure and is covered with a rubber layer on its outer wall, it can roll and contact the frame surface as the battery frame 2 continues to move downward, reducing frictional resistance while continuously applying a flexible clamping force to the frame. After the battery frame 2 is finally clamped, the movable plate 93 continues to be subjected to the elastic thrust of the telescopic spring 910 and the roller 931, thus maintaining its position. The compression of the bottom side beams of the battery frame 2 creates a synchronous support and limiting structure on both the front and rear sides of the battery frame 2. This ensures that the battery frame 2 is not only supported by the bottom of the bottom support assembly 7 during the welding process, but also laterally constrained by the top clamping assembly 9. Especially under the action of welding heat input, the battery frame 2 is prone to local shrinkage, warping, and side beam deformation. The top clamping assembly 9 can continuously apply compensating clamping force to the frame, so that the battery frame 2 always maintains the preset posture during the welding process, thereby reducing structural deformation caused by welding stress and improving the overall frame dimensional accuracy and welding quality.

[0033] In this device, the bottom support assembly 7 and the clamping assembly 9 form a mechanical linkage. When the battery frame 2 is placed on the support plate 73, its weight first acts on the horizontal plate 77. The horizontal plate 77 pushes the toothed plate 76 to move through the piston rod 751. The toothed plate 76 drives the toothed disc 710 to rotate and further drive the clamping assembly 9 to move, so that the moving plate 93 automatically moves closer to the battery frame 2 and completes the lateral clamping. Thus, the three actions of workpiece placement, bottom support and lateral clamping can be completed automatically and continuously without additional manual adjustment.

[0034] It should be noted that the specific model and specifications of electrical components such as motors need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A welding fixture for a lightweight battery rack for new energy vehicles, comprising a flip base (1), wherein a battery frame (2) and a support base (4) are provided above the flip base (1), characterized in that, The support base (4) is provided with a tray (3) and a processing platform (6) above it. The tray (3) is connected to a clamping component (9), which is used to prevent deformation of the battery frame (2) during the welding process. The processing platform (6) is connected to a bottom support component (7), which is used to fasten the battery frame (2).

2. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 1, characterized in that, The flipping seat (1) and the support seat (4) are detachably connected. The lower end of the support seat (4) is fixedly connected to a motor (5). One end of the motor (5) passes through the side wall of the support seat (4) and is fixedly connected to a drive gear (12). The side wall of the support seat (4) is provided with an annular groove (41). The inner wall of the annular groove (41) is rotatably connected to a number of circumferentially distributed rotating beads (42).

3. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 2, characterized in that, One end of the tray (3) is rotatably connected to the inner wall of the annular groove (41), and the other end of the tray (3) is fixedly connected to the mounting plate (11). The side wall of the tray (3) is fixedly connected to a number of teeth (31) arranged in a circular array, and the teeth (31) mesh with the drive gear (12).

4. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 1, characterized in that, The clamping assembly (9) includes a fixing plate (95), one end of which is fixedly connected to the side wall of the support plate (3), and the other end of which is fixedly connected to a fixing frame (94). A baffle (97) is slidably connected to the inner wall of the fixing frame (94), and an extension rod (96) is provided on one side of the baffle (97).

5. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 4, characterized in that, One end of the extension rod (96) is fixedly connected to the baffle (97), and the other end of the extension rod (96) passes through the side wall of the fixed frame (94). A telescopic spring (910) is sleeved on the outer wall of the extension rod (96), and the two ends of the telescopic spring (910) are fixedly connected to the inner wall of the fixed frame (94) and the side wall of the baffle (97), respectively.

6. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 5, characterized in that, The extension rod (96) is fixedly connected to a movable plate (93) at one end outside the fixed frame (94), and a roller (931) is rotatably connected to the side of the movable plate (93) away from the fixed frame (94).

7. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 6, characterized in that, The side wall of the fixed plate (95) is rotatably connected to a connecting rod (91). The end of the connecting rod (91) away from the fixed plate (95) is provided with a slot (92). The end of the connecting rod (91) located inside the fixed plate (95) is fixedly connected to a turntable (98). The outer wall of the turntable (98) is fixedly connected to an extrusion block (99). The side of the extrusion block (99) that slides against the baffle (97) is arc-shaped.

8. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 7, characterized in that, The base support assembly (7) includes a support plate (73), one end of which is fixedly connected to the processing platform (6). The side wall of the support plate (73) is provided with a guide groove (74), the upper end of which is "V" shaped. The other end of the support plate (73) is rotatably connected to a card holder (71). The side wall of the processing platform (6) is fixedly connected to a side plate (8) and a limiting strip (10). The card holder (71) is connected to a fixing bolt (72). The side wall of the card holder (71) is threadedly connected to an adjusting screw (79). One end of the adjusting screw (79) is rotatably connected to a clamping seat (78).

9. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 8, characterized in that, The base assembly (7) also includes a fixed seat (75), which is fixedly connected to the side wall of the support plate (73). The fixed seat (75) is slidably connected to a piston rod (751). One end of the piston rod (751) is provided with a return spring (752). The two ends of the return spring (752) are fixedly connected to the inner wall of the fixed seat (75) and the side wall of the piston rod (751), respectively. The other end of the piston rod (751) is fixedly connected to a horizontal plate (77), and the side wall of the horizontal plate (77) is fixedly connected to a toothed plate (76).

10. The welding fixture for a lightweight battery rack for new energy vehicles according to claim 9, characterized in that, The base support assembly (7) also includes a vertical plate (711), one end of which is fixedly connected to the side wall of the processing platform (6). A rotating rod (712) is rotatably connected to the side wall of the vertical plate (711). A limiting block (7121) that matches the slot (92) is fixedly connected to one end of the rotating rod (712). A gear plate (710) is fixedly connected to the other end of the rotating rod (712). The gear plate (710) meshes with the gear plate (76).

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