A welding tool for a battery case

Abstract

The utility model relates to welding frock technical field, concretely is a kind of welding frock for battery box, including pedestal, still including lower part compression mechanism and upper part compression mechanism, lower part compression mechanism includes the first compression assembly, second compression assembly and two third compression assembly and fourth compression assembly of movably setting on pedestal, the first compression assembly, second compression assembly and two third compression assembly and fourth compression assembly are used to fix multiple border frames and crossbeam, upper part compression mechanism includes the fifth compression assembly, two sixth compression assembly and seventh compression assembly of movably setting on pedestal, the fifth compression assembly, two sixth compression assembly and seventh compression assembly are used to compress bottom plate on multiple border frames and crossbeam. The utility model's welding frock for battery box, bottom plate realizes close adhesion on multiple border frames and crossbeam, ensure that in subsequent welding process, bottom plate cannot be deformed, the flange surface flatness of multiple border frames and crossbeam after welding meets the requirement.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, specifically to a welding tooling for a battery box. Background Technology

[0002] A complete (lithium) battery enclosure consists of a base plate (liquid-cooled plate), frame, crossbeams, and other accessories. The flange face formed by the frame and crossbeams connects the top cover plate to the battery pack and is a crucial surface for ensuring sealing, waterproofing, and dustproofing. Therefore, it requires high precision in the post-weld flatness of the flange face, as well as precise positioning of the holes. The base plate is often welded from two or more liquid-cooled plates. In existing welding fixtures, the frame and crossbeams are pressed onto the base plate for welding. This base plate is prone to deformation during welding, leading to substandard flatness and hole positioning of the flange face after welding, ultimately affecting the assembly and sealing of the (lithium) battery enclosure. Therefore, a welding fixture for battery enclosures is urgently needed to solve these problems. Utility Model Content

[0003] To address the technical problem that welding the frame and crossbeams onto the base plate can easily deform during welding, leading to substandard flatness of the flange surfaces and incorrect hole positioning of the frame and crossbeams after welding, this utility model provides a welding fixture for battery boxes. The base plate is tightly fitted onto multiple frame and crossbeam components, ensuring that the base plate will not deform during subsequent welding. This ensures that the flatness of the flange surfaces of the welded frame and crossbeams meets requirements, and the hole positioning of the welded frame and crossbeams meets requirements.

[0004] This utility model provides a welding fixture for a battery box, including a base, a lower clamping mechanism, and an upper clamping mechanism. The lower clamping mechanism includes a first clamping component, a second clamping component, two third clamping components, and a fourth clamping component movably disposed on the base. The first clamping component, the second clamping component, the two third clamping components, and the fourth clamping component are used to fix multiple side frames and crossbeams. The upper clamping mechanism includes a fifth clamping component, two sixth clamping components, and a seventh clamping component movably disposed on the base. The fifth clamping component, the two sixth clamping components, and the seventh clamping component are used to press the base plate onto the multiple side frames and crossbeams.

[0005] Furthermore, the first clamping assembly includes two first clamping parts, which are arranged sequentially along the width direction of the base; each first clamping part includes a first cylinder, a U-shaped movable block, a fixed block, and a first support block. An L-shaped support plate is fixedly mounted on the base. The bottom of the first cylinder is rotatably mounted on the bottom of the L-shaped support plate. The telescopic rod of the first cylinder is rotatably connected to one end of a T-shaped connecting plate. The other end of the T-shaped connecting plate is rotatably connected to the top of the L-shaped support plate. The U-shaped movable block is fixedly mounted on the T-shaped connecting plate. The fixed block and the first support block are fixedly mounted on the base. The first support block is located between the U-shaped movable block and the fixed block.

[0006] Furthermore, the second clamping assembly includes two second clamping parts, which are arranged sequentially along the width direction of the base; each second clamping part includes a second cylinder and a second support block fixedly mounted on the base, the second cylinder being located to the side of the second support block, a first protective sleeve being fixedly mounted on the top of the second cylinder, the first protective sleeve having a first through hole, the telescopic rod of the second cylinder being fixedly connected to a first positioning pin, and the first positioning pin passing through the first through hole.

[0007] Furthermore, each of the third clamping components includes two third clamping parts, which are arranged sequentially and symmetrically along the width direction of the base; each of the third clamping parts includes a third cylinder, a first limiting block, a second limiting block, and a third support block. The third cylinder is fixedly mounted on the base, and the telescopic rod of the third cylinder is fixedly connected to the mounting plate. A first lifting plate and a second lifting plate are fixedly mounted on the mounting plate. The first limiting block is fixedly mounted on the first lifting plate, and the second limiting block and the third support block are fixedly mounted on the second lifting plate. The third support block is located between the first limiting block and the second limiting block, and a second positioning pin is fixedly mounted on the second lifting plate.

[0008] Furthermore, each of the fourth clamping components includes a fourth cylinder and two fourth support blocks. The fourth cylinder is fixedly mounted on the base, and a fixed frame is fixedly mounted on the top of the fourth cylinder. The telescopic rod of the fourth cylinder passes through the interior of the fixed frame and is fixedly connected to a connecting rod. A movable block is fixedly mounted on the connecting rod. A limit groove is provided on the fixed frame, and the movable block is slidably mounted in the limit groove. Both ends of the connecting rod are rotatably connected to one end of each of the two transmission frames. The other ends of the two transmission frames are rotatably connected to the bottom of each of the two rotating plates. The lower parts of the two rotating plates are rotatably mounted on the fixed frame, and the tops of the two rotating plates extend out of the fixed frame and are fixedly connected to clamping plates. Two clamps are fixedly mounted on each clamping plate. A V-shaped support plate is fixedly mounted on the top of the fixed frame, and the two fourth support blocks are fixedly mounted at both ends of the V-shaped support plate. The V-shaped support plate and the two fourth support blocks are located between the two clamping plates.

[0009] Furthermore, each of the fourth clamping components also includes two fifth cylinders fixedly mounted on the base, with the fourth cylinder located between the two fifth cylinders. A second protective sleeve is fixedly mounted on the top of each fifth cylinder, and a second through hole is provided on the second protective sleeve. The telescopic rod of the fifth cylinder is fixedly connected to a third positioning pin, and the third positioning pin passes through the second through hole.

[0010] Furthermore, the fifth clamping assembly includes two fifth clamping parts, which are symmetrically arranged along the width direction of the base; each fifth clamping part includes a first welding clamping cylinder and a first pressure plate, the first welding clamping cylinder is fixedly mounted on the base, the clamping arm of the first welding clamping cylinder is fixedly connected to the first pressure plate, the first pressure plate is U-shaped, and a first pressure block is fixedly mounted on the first pressure plate.

[0011] Furthermore, the sixth clamping assembly includes two sixth clamping parts, which are symmetrically arranged along the width direction of the base; each sixth clamping part includes a second welding clamping cylinder and a second pressure plate, the second welding clamping cylinder is fixedly mounted on the base, the clamping arm of the second welding clamping cylinder is fixedly connected to the second pressure plate, the second pressure plate is U-shaped, and a second pressure block is fixedly mounted on the second pressure plate.

[0012] Furthermore, the seventh clamping assembly includes two seventh clamping parts, which are symmetrically arranged along the width direction of the base; each of the seventh clamping parts includes a third welding clamping cylinder and a third pressure plate, the third welding clamping cylinder is fixedly mounted on the base, the clamping arm of the third welding clamping cylinder is fixedly connected to the third pressure plate, and a third pressure block is fixedly mounted on the third pressure plate.

[0013] Furthermore, the upper pressing mechanism also includes a positioning assembly, which includes two positioning parts symmetrically arranged along the width direction of the base. Each positioning part includes a positioning plate, a positioning cylinder, and a sliding plate. The positioning plate is fixedly mounted on the base and has a groove. A slide rail is fixedly mounted in the groove and a slider is slidably mounted on the slide rail. The sliding plate is fixedly mounted on the slider. The positioning cylinder is fixedly mounted on the positioning plate and its telescopic rod is fixedly connected to the sliding plate. A support frame is fixedly mounted on the sliding plate and a positioning column is fixedly mounted on the support frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The welding fixture for the battery box of this utility model ensures that the base plate is tightly fitted to multiple frames and crossbeams, so that the base plate will not deform during the subsequent welding process. The flatness of the flange surfaces of the multiple frames and crossbeams after welding meets the requirements, and the position of the holes of the multiple frames and crossbeams meets the requirements. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a welding fixture for a battery box according to this utility model;

[0017] Figure 2 This is a schematic diagram of the welding fixture of this utility model, which presses the base plate against multiple frames and crossbeams.

[0018] Figure 3 This is a schematic diagram of the welding fixture of this utility model for fixing multiple frames and crossbeams;

[0019] Figure 4 This is a schematic diagram of the structure of the first pressing part of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the U-shaped movable block of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the second pressing part and the positioning part of this utility model;

[0022] Figure 7 This is a utility model Figure 6 Enlarged structural diagram of A in the middle;

[0023] Figure 8 This is a utility model Figure 6 Enlarged structural diagram of B in the middle;

[0024] Figure 9 This is a schematic diagram of the internal structure of the positioning plate of this utility model;

[0025] Figure 10This is a structural diagram of the third clamping part of this utility model when fixing the second crossbeam;

[0026] Figure 11 This is a schematic diagram of the structure of the third pressing part of this utility model;

[0027] Figure 12 This is a structural diagram of the fourth clamping component of this utility model when fixing the third crossbeam;

[0028] Figure 13 This is a utility model Figure 12 Enlarged schematic diagram of the structure of C in the middle;

[0029] Figure 14 This is a partial structural schematic diagram of the fourth clamping component of this utility model;

[0030] Figure 15 This is a schematic diagram of the internal structure of the fixing frame of this utility model;

[0031] Figure 16 This is a cross-sectional structural diagram of the fixing frame of this utility model;

[0032] Figure 17 This is a schematic diagram of the structure of the fifth pressing part of this utility model;

[0033] Figure 18 This is a structural schematic diagram of the sixth clamping part of this utility model;

[0034] Figure 19 This is a schematic diagram of the structure of the seventh pressing part of this utility model;

[0035] The numbers in the attached diagram are:

[0036] 1. Base; 11. L-shaped support plate; 12. First seat plate; 13. Second seat plate; 14. Third seat plate; 2. First pressing part; 21. First cylinder; 22. U-shaped movable block; 23. Fixed block; 24. First support block; 25. T-shaped connecting plate; 3. Second clamping part; 31. Second cylinder; 32. Second support block; 33. First protective sleeve; 34. First positioning pin; 4. Third clamping part; 41. Third cylinder; 42. First limit block; 43. Second limit block; 44. Third support block; 45. Mounting plate; 46. First lifting plate; 47. Second lifting plate; 48. Second positioning pin; 5. Fourth clamping assembly; 51. Fourth cylinder; 52. Fourth support block; 53. Fixed frame; 531. V-shaped support plate; 54. Connecting rod; 541. Moving block; 542. Transmission frame; 55. Rotating plate; 56. Clamping plate; 561. Chuck; 57. Fifth cylinder; 58. Second protective sleeve; 59. Third positioning pin; 6. Fifth clamping part; 61. First welding clamping cylinder; 62. First pressure plate; 63. First pressure block; 64. First support plate; 7. Sixth clamping part; 71. Second welding clamping cylinder; 72. Second pressure plate; 73. Second pressure block; 74. Second support plate; 8. Seventh clamping part; 81. Third welding clamping cylinder; 82. Third pressure plate; 83. Third pressure block; 84. Third support plate; 9. Positioning part; 91. Positioning plate; 911. Slide rail; 912. Slider; 92. Positioning cylinder; 93. Sliding plate; 94. Stand; 95. Positioning column. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1-19As shown, a welding fixture for a battery box includes a base 1, a lower clamping mechanism, and an upper clamping mechanism. The lower clamping mechanism includes a first clamping component, a second clamping component, two third clamping components, and a fourth clamping component 5 movably disposed on the base 1. The first clamping component, the second clamping component, the two third clamping components, and the fourth clamping component 5 are used to fix multiple side frames and crossbeams. The upper clamping mechanism includes a fifth clamping component, two sixth clamping components, and a seventh clamping component movably disposed on the base 1. The fifth clamping component, the two sixth clamping components, and the seventh clamping component are used to press the base plate onto the multiple side frames and crossbeams. Preferably, the first and second clamping components are arranged sequentially from left to right along the length of the base 1, and the two third and fourth clamping components 5 are spaced apart from left to right along the length of the base 1. The first and second clamping components are located to the left of the two third and fourth clamping components 5. The two sixth and seventh clamping components are spaced apart from left to right along the length of the base 1, and the fifth clamping component is located to the left of the two sixth and seventh clamping components of the clamping group.

[0039] The system comprises two borders, a left border and a right border, and four crossbeams, designated as a first crossbeam, a second crossbeam, a third crossbeam, and a fourth crossbeam. Specifically, a first clamping assembly secures the left border, a second clamping assembly secures the first crossbeam, two third clamping assemblies secure the second and fourth crossbeams respectively, and two fourth clamping assemblies secure the third crossbeam and the right border respectively.

[0040] The working process of the welding fixture for the battery box: First, the first clamping component, the second clamping component, and two third clamping components and the fourth clamping component 5 fix multiple frames and crossbeams. Then, the base plate is placed on multiple frames and crossbeams. Subsequently, the fifth clamping component, two sixth clamping components and the seventh clamping component press the base plate tightly onto multiple frames and crossbeams, ensuring that the base plate is tightly attached to multiple frames and crossbeams.

[0041] Generally, the welding fixture of this embodiment is fixed to an external robot positioner. The external robot positioner operates to make the flange faces of multiple frames and beams face upwards. Finally, the external welding device performs the operation to weld the multiple frames and beams to the base plate. At the same time, because the base plate is tightly attached to the multiple frames and beams, the base plate will not deform during welding. The flatness of the flange faces of the multiple frames and beams after welding meets the requirements, and the positional accuracy (i.e., positional precision) of the holes of the multiple frames and beams meets the requirements.

[0042] The welding fixture implemented in this case ensures that the base plate fits tightly against multiple frames and beams, preventing deformation of the base plate during subsequent welding. The flatness of the flange surfaces of the multiple frames and beams after welding meets the requirements, as does the position of the holes in the multiple frames and beams.

[0043] In one possible implementation, the first clamping assembly includes two first clamping parts 2, which are arranged sequentially along the width direction of the base 1. The left frame is fixed to the two first clamping parts 2. In this embodiment, two water inlets are provided on the left frame, and the first clamping assembly is located to the left of the water inlets. Each first clamping part 2 includes a first cylinder 21, a U-shaped movable block 22, a fixed block 23, and a first support block 24. An L-shaped support plate 11 is fixedly provided on the base 1. The bottom of the first cylinder 21 is rotatably disposed at the bottom of the L-shaped support plate 11. The telescopic rod of the first cylinder 21 is rotatably connected to one end of a T-shaped connecting plate 25. The other end of the T-shaped connecting plate 25 is rotatably connected to the top of the L-shaped support plate 11. The U-shaped movable block 22 is fixedly disposed on the T-shaped connecting plate 25. The fixed block 23 and the first support block 24 are fixedly disposed on the base 1, and the first support block 24 is located between the U-shaped movable block 22 and the fixed block 23.

[0044] The left frame is placed on the two first support blocks 24, and the two fixed blocks 23 contact the right wall of the left frame. The two first cylinders 21 are activated. Because the first cylinders 21 are rotatably connected to the L-shaped support plate 11 and the T-shaped connecting plate 25, the position of the first cylinders 21 changes slightly. Since the T-shaped connecting plate 25 is also rotatably connected to the top of the L-shaped support plate 11, the T-shaped connecting plate 25 rotates to the right relative to the L-shaped support plate 11. The U-shaped movable blocks 22 rotate to the right accordingly. Finally, the two U-shaped movable blocks 22 are pressed against the left wall of the left frame and are located outside the sprue. The two U-shaped movable blocks 22 and the fixed blocks 23 work together to keep the left frame fixed on the two first support blocks 24.

[0045] After welding is completed, the first cylinder 21 drives the U-shaped movable block 22 to rotate to the left, making it easier to remove the welded base plate, multiple frames and crossbeams from the welding fixture.

[0046] Preferably, a first hinge seat is fixedly provided at the bottom of the first cylinder 21, and two first openings are provided on the hinge seat. A third opening is provided at the bottom of the L-shaped support plate 11. The first pin passes through the third opening and the two first openings, and the first cylinder 21 rotates relative to the L-shaped support plate 11 through the first pin.

[0047] Preferably, the telescopic rod of the first cylinder 21 is fixedly connected to the second hinge seat, the second hinge seat is provided with two second openings, one end of the T-shaped connecting plate 25 is provided with a fourth opening, the second pin passes through the second opening and the two fourth openings, and the first cylinder 21 and the T-shaped connecting plate 25 achieve relative rotation through the second pin.

[0048] Preferably, the other end of the T-shaped connecting plate 25 is provided with a fifth opening, and the top of the L-shaped support plate 11 is provided with two sixth openings. The third pin passes through the fifth opening and the two sixth openings, and the T-shaped connecting plate 25 and the L-shaped support plate 11 can rotate relative to each other through the third pin.

[0049] Preferably, the U-shaped movable block 22 includes a first block and two second blocks fixedly disposed on the first block. The U-shaped movable block 22 is pressed against the left wall of the left frame and located outside the sprue. In fact, the two second blocks are pressed against the left wall of the left frame, and the sprue is located between the first block and the two second blocks.

[0050] A shim is provided between the first block and the two second blocks. The different thicknesses of the shims allow for adjustment of the position of the U-shaped movable block 22, thereby ensuring that the left frame of different sizes can be fixed.

[0051] Preferably, the fixing block 23 is irregularly shaped, and the shape of the fixing block 23 matches the right wall of the left frame.

[0052] Preferably, a first base plate 12 and a second base plate 13 are fixedly disposed on the base 1, a first support block 24 is fixedly disposed on the first base plate 12, and a fixing block 23 is fixedly disposed on the second base plate 13. A shim is disposed between the fixing block 23 and the second base plate 13, and the different thicknesses of the shims allow for adjustment of the position of the fixing block 23, thereby ensuring that the left frame of different sizes can be fixed.

[0053] In one possible implementation, the second clamping assembly includes two second clamping parts 3, which are arranged sequentially along the width direction of the base 1. A first crossbeam is fixed on the two second clamping parts 3. Each second clamping part 3 includes a second cylinder 31 and a second support block 32 fixedly mounted on the base 1. The second cylinder 31 is located to the side of the second support block 32. A first protective sleeve 33 is fixedly mounted on the top of the second cylinder 31. A first through hole is provided on the first protective sleeve 33. The telescopic rod of the second cylinder 31 is fixedly connected to a first positioning pin 34, which passes through the first through hole.

[0054] The first crossbeam is placed on the two second support blocks 32. The two second cylinders 31 are started, which drives the two first positioning pins 34 to move upward. The two first positioning pins 34 pass through the first through hole and extend into the hole of the first crossbeam. The two first positioning pins 34 position the first crossbeam, so that the first crossbeam remains fixed on the two second support blocks 32.

[0055] After welding is completed, the second cylinder 31 drives the first positioning pin 34 to move downward, making it easier for the welded base plate, multiple frames and crossbeams to be removed from the welding fixture.

[0056] Preferably, a third base plate 14 is fixedly mounted on the base 1, and a second support block 32 is fixedly mounted on the third base plate 14. A shim is provided between the second support block 32 and the third base plate 14. The different thicknesses of the shims allow for adjustment of the position of the second support block 32, thereby ensuring that the first crossbeams of different sizes can be fixed.

[0057] In one possible implementation, each of the third clamping components includes two third clamping parts 4, which are arranged sequentially and symmetrically along the width direction of the base 1. The second crossbeam and the fourth crossbeam are respectively fixed on the third clamping parts 4 of the two third clamping components. Each third clamping part 4 includes a third cylinder 41, a first limiting block 42, a second limiting block 43, and a third support block 44. The third cylinder 41 is fixedly mounted on the base 1, and the telescopic rod of the third cylinder 41 is fixedly connected to the mounting plate 45. A first lifting plate 46 and a second lifting plate 47 are fixedly mounted on the mounting plate 45. The first limiting block 42 is fixedly mounted on the first lifting plate 46, and the second limiting block 43 and the third support block 44 are fixedly mounted on the second lifting plate 47. The third support block 44 is located between the first limiting block 42 and the second limiting block 43. A second positioning pin 48 is fixedly mounted on the second lifting plate 47.

[0058] Taking the fixing of the second crossbeam as an example, the two third cylinders 41 are activated, driving the two mounting plates 45, the first lifting plate 46, the second lifting plate 47, the first limiting block 42, the second limiting block 43, the third support block 44, and the second positioning pin 48 to move upward simultaneously. The end of the second crossbeam is engaged between the third support block 44, the first limiting block 42, and the second limiting block 43, while the second positioning pin 48 extends into the hole of the second crossbeam. The two second positioning pins 48 position the second crossbeam, keeping it fixed between the third support block 44, the first limiting block 42, and the second limiting block 43. The same principle applies to the fixing method of the fourth crossbeam.

[0059] After welding is completed, the third cylinder 41 drives the second positioning pin 48 to move downward, making it easier to remove the welded base plate, multiple frames and crossbeams from the welding fixture.

[0060] In one possible implementation, the third crossbeam and the right side frame are respectively fixed to two fourth clamping assemblies 5. Each of the fourth clamping assemblies 5 includes a fourth cylinder 51 and two fourth support blocks 52. The fourth cylinder 51 is fixedly mounted on the base 1, and a fixing frame 53 is fixedly mounted on the top of the fourth cylinder 51. The telescopic rod of the fourth cylinder 51 passes through the interior of the fixing frame 53 and is fixedly connected to a connecting rod 54. A moving block 541 is fixedly mounted on the connecting rod 54. A limit groove is provided on the fixing frame 53, and the moving block 541 is slidably mounted in the limit groove. The two ends of the connecting rod 54 are rotatably connected to one end of each of the two transmission frames 542. The other end of the movable frame 542 is rotatably connected to the bottom of the two rotating plates 55 respectively. The lower parts of the two rotating plates 55 are rotatably mounted on the fixed frame 53. The tops of the two rotating plates 55 extend to the outside of the fixed frame 53 and are fixedly connected to the clamping plate 56. Two clamps 561 are fixedly mounted on each clamping plate 56. A V-shaped support plate 531 is fixedly mounted on the top of the fixed frame 53. Two fourth support blocks 52 are fixedly mounted at both ends of the V-shaped support plate 531. The V-shaped support plate 531 and the two fourth support blocks 52 are located between the two clamping plates 56.

[0061] Taking the fixed third crossbeam as an example, the fourth cylinder 51 is activated, driving the connecting rod 54 to move upward. At this time, the moving block 541 slides upward relative to the limiting groove, limiting the range of vertical movement of the connecting rod 54. After the connecting rod 54 moves upward, it drives the transmission frame 542 to rotate, and the rotating plate 55 rotates accordingly. At the same time, the rotating plate 55 rotates relative to the fixed frame 53, and the top of the rotating plate 55 opens outward relative to the V-shaped support plate 531. The clamping plate 56 and the two clamps 561 also open outward. The two clamping plates 56 open outward at the same time, and finally the third crossbeam can be placed on the fourth support block 52 of the two V-shaped support plates 531.

[0062] The fourth cylinder 51 is activated, causing the connecting rod 54 to move downwards, and the moving block 541 slides downwards relative to the limiting groove. After the connecting rod 54 moves downwards, it drives the transmission frame 542 and the rotating plate 55 to rotate. At the same time, the rotating plate 55 rotates relative to the fixed frame 53, and the top of the rotating plate 55 closes inwards relative to the V-shaped support plate 531. The clamping plate 56 and the two clamps 561 also close inwards. The two clamping plates 56 close inwards simultaneously and clamp the third crossbeam. Finally, the third crossbeam remains fixed on the fourth support block 52 of the two V-shaped support plates 531. Similarly, the fixing method of the right frame can be understood.

[0063] After welding is completed, the two clamps 56 open outwards again to facilitate the removal of the welded base plate, multiple frames and crossbeams from the welding fixture.

[0064] Preferably, the end of the connecting rod 54 is rotatably connected to one end of the transmission frame 542 via a fourth pin. The other end of the transmission frame 542 is rotatably connected to the bottom of the rotating plate 55 via a fifth pin. The lower part of the rotating plate 55 is rotatably connected to the fixed frame 53 via a sixth pin.

[0065] As one possible implementation, each of the fourth clamping components 5 further includes two fifth cylinders 57 fixedly mounted on the base 1. The fourth cylinder 51 is located between the two fifth cylinders 57. A second protective sleeve 58 is fixedly mounted on the top of each fifth cylinder 57. A second through hole is provided on the second protective sleeve 58. The telescopic rod of the fifth cylinder 57 is fixedly connected to a third positioning pin 59, which passes through the second through hole.

[0066] The two fifth cylinders 57 are started, which drives the two third positioning pins 59 to move upward. The two third positioning pins 59 pass through the second through hole and extend into the hole of the third crossbeam. The third positioning pins 59 position the third crossbeam and keep it fixed.

[0067] After welding is completed, the fifth cylinder 57 drives the third locating pin 59 to move downwards, making it easier to remove the welded base plate, multiple frames and crossbeams from the welding fixture.

[0068] In one possible implementation, the fifth clamping assembly includes two fifth clamping parts 6, which are symmetrically arranged along the width direction of the base 1. Each fifth clamping part 6 includes a first welding clamping cylinder 61 and a first pressure plate 62. The first welding clamping cylinder 61 is fixedly mounted on the base 1, and its clamping arm is fixedly connected to the first pressure plate 62. The first pressure plate 62 is U-shaped, and two first pressure blocks 63 are fixedly mounted on it. Preferably, the fifth clamping assembly further includes a first support plate 64 fixedly mounted on the base 1. The first support plate 64 contacts the base plate and supports it.

[0069] The sixth clamping assembly includes two sixth clamping parts 7, which are symmetrically arranged along the width direction of the base 1. Each sixth clamping part 7 includes a second welding clamping cylinder 71 and a second pressure plate 72. The second welding clamping cylinder 71 is fixedly mounted on the base 1, and its clamping arm is fixedly connected to the second pressure plate 72. The second pressure plate 72 is U-shaped, wherein the width of the second pressure plate 72 is greater than the width of the first pressure plate 62, and the length of the second pressure plate 72 is greater than the length of the first pressure plate 62. Two second pressure blocks 73 are fixedly mounted on the second pressure plate 72. Preferably, the sixth clamping assembly further includes a second support plate 74 fixedly mounted on the base 1. The second support plate 74 contacts the bottom plate and is used to support the bottom plate.

[0070] The seventh clamping assembly includes two seventh clamping parts 8, which are symmetrically arranged along the width direction of the base 1. Each seventh clamping part 8 includes a third welding clamping cylinder 81 and a third pressure plate 82. The third welding clamping cylinder 81 is fixedly mounted on the base 1, and its clamping arm is fixedly connected to the third pressure plate 82. Two third pressure blocks 83 are fixedly mounted on the third pressure plate 82. Preferably, the seventh clamping assembly further includes a third support plate 84 fixedly mounted on the base 1. The third support plate 84 contacts the base plate and is used to support the base plate.

[0071] The structures of the first welding clamping cylinder 61, the second welding clamping cylinder 71, and the third welding clamping cylinder 81 are existing technologies and will not be described in detail here. The first welding clamping cylinder 61, the second welding clamping cylinder 71, and the third welding clamping cylinder 81 can be JSK series high-strength welding clamping cylinders. The maximum tilting angle of the clamping arms of the first welding clamping cylinder 61, the second welding clamping cylinder 71, and the third welding clamping cylinder 81 is 135°. The first welding clamping cylinder 61, the second welding clamping cylinder 71, and the third welding clamping cylinder 81 operate synchronously.

[0072] The base plate is placed on multiple frames and crossbeams. Two first welding clamping cylinders 61 and four second welding clamping cylinders 71 and third welding clamping cylinders 81 are activated simultaneously, causing their respective clamping arms to flip downwards (clamping arms close), which in turn causes the first pressure block 63, the second pressure block 73 and the third pressure block 83 to press down on the base plate, ultimately making the base plate tightly fit against the multiple frames and crossbeams.

[0073] After welding is completed, the two first welding clamping cylinders 61, the second welding clamping cylinder 71 and the third welding clamping cylinder 81 then rotate upward (open the clamping arms) to facilitate the removal of the welded base plate, multiple frame pieces and crossbeams from the welding fixture.

[0074] In one possible implementation, the upper clamping mechanism further includes a positioning assembly. Two sets of positioning assemblies are provided, each comprising two positioning parts 9 symmetrically arranged along the width direction of the base 1. Each positioning part 9 includes a positioning plate 91, a positioning cylinder 92, and a sliding plate 93. The positioning plate 91 is fixedly mounted on the base 1 and has a groove. A slide rail 911 is fixedly mounted in the groove, and a slider 912 is slidably mounted on the slide rail 911. The sliding plate 93 is fixedly mounted on the slider 912. The positioning cylinder 92 is fixedly mounted on the positioning plate 91, and its extension rod is fixedly connected to the sliding plate 93. A support frame 94 is fixedly mounted on the sliding plate 93, and a positioning column 95 is fixedly mounted on the support frame 94.

[0075] The base plate is placed on multiple frames and crossbeams. The positioning cylinder 92 is activated, which drives the sliding plate 93 to slide upward. At this time, the slider 912 slides upward relative to the slide rail 911. The upright 94 and the positioning post 95 slide upward accordingly. Finally, the positioning post 95 extends into the hole in the base plate. The positioning post 95 positions the base plate, keeping it fixed relative to the multiple frames and crossbeams.

[0076] After welding is completed, the positioning cylinder 92 drives the sliding plate 93 to slide downward. At this time, the slider 912 slides downward relative to the slide rail 911, and the upright 94 and the positioning column 95 slide downward accordingly. Finally, the positioning column 95 leaves the hole in the base plate.

[0077] The working process of welding fixtures for battery boxes:

[0078] Fix the left frame: The left frame is placed on the two first support blocks 24, the two fixing blocks 23 are in contact with the right wall of the left frame, the two first cylinders 21 are activated, and finally the two U-shaped movable blocks 22 are pressed against the left wall of the left frame.

[0079] Fixing the first crossbeam: The first crossbeam is placed on the two second support blocks 32, and the two second cylinders 31 are started, which drives the two first positioning pins 34 to move upward. The two first positioning pins 34 pass through the first through hole and extend into the hole of the first crossbeam.

[0080] Fixing the second crossbeam: The two third cylinders 41 are activated, causing the two mounting plates 45, the first lifting plate 46, the second lifting plate 47, the first limiting block 42, the second limiting block 43, the third support block 44, and the second positioning pin 48 to move upwards simultaneously. The end of the second crossbeam engages between the third support block 44, the first limiting block 42, and the second limiting block 43, while the second positioning pin 48 extends into the hole in the second crossbeam. The same principle applies to fixing the fourth crossbeam.

[0081] Fixing the third crossbeam: The fourth cylinder 51 is activated, driving the connecting rod 54 to move downwards, and the moving block 541 slides downwards relative to the limiting groove. After the connecting rod 54 moves downwards, it drives the transmission frame 542 and the rotating plate 55 to rotate. At the same time, the rotating plate 55 rotates relative to the fixed frame 53, and the top of the rotating plate 55 closes inwards relative to the V-shaped support plate 531. The clamping plate 56 and the two clamps 561 close inwards simultaneously and clamp the third crossbeam. Finally, the third crossbeam remains fixed on the fourth support block 52 of the two V-shaped support plates 531. Similarly, the fixing method of the right frame can be understood.

[0082] After the left and right side frames, as well as the first, second, third, and fourth crossbeams, are fixed, the base plate is placed on them. The two first welding clamping cylinders 61 and the four second welding clamping cylinders 71 and third welding clamping cylinders 81 are activated simultaneously, causing their respective clamping arms to flip downwards (clamping arms close), which in turn causes the first pressure block 63, the second pressure block 73, and the third pressure block 83 to press onto the base plate, ultimately making the base plate tightly adhere to the multiple side frames and crossbeams.

[0083] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A welding fixture for a battery box, comprising a base (1), characterized in that, It also includes a lower pressing mechanism and an upper pressing mechanism. The lower pressing mechanism includes a first pressing component, a second pressing component, two third pressing components, and a fourth pressing component (5) movably disposed on the base (1). The first pressing component, the second pressing component, the two third pressing components, and the fourth pressing component (5) are used to fix multiple side frames and crossbeams. The upper pressing mechanism includes a fifth pressing component, two sixth pressing components, and a seventh pressing component movably disposed on the base (1). The fifth pressing component, the two sixth pressing components, and the seventh pressing component are used to press the base plate onto multiple side frames and crossbeams.

2. The welding fixture for a battery box according to claim 1, characterized in that, The first pressing assembly includes two first pressing parts (2), which are arranged sequentially along the width direction of the base (1). Each first pressing part (2) includes a first cylinder (21), a U-shaped movable block (22), a fixed block (23), and a first support block (24). An L-shaped support plate (11) is fixedly arranged on the base (1). The bottom of the first cylinder (21) is rotatably arranged on the bottom of the L-shaped support plate (11). The telescopic rod of the first cylinder (21) is rotatably connected to one end of the T-shaped connecting plate (25). The other end of the T-shaped connecting plate (25) is rotatably connected to the top of the L-shaped support plate (11). The U-shaped movable block (22) is fixedly arranged on the T-shaped connecting plate (25). The fixed block (23) and the first support block (24) are fixedly arranged on the base (1). The first support block (24) is located between the U-shaped movable block (22) and the fixed block (23).

3. The welding fixture for a battery box according to claim 1, characterized in that, The second clamping assembly includes two second clamping parts (3), which are arranged sequentially along the width direction of the base (1). Each second clamping part (3) includes a second cylinder (31) and a second support block (32) fixedly mounted on the base (1). The second cylinder (31) is located on the side of the second support block (32). A first protective sleeve (33) is fixedly mounted on the top of the second cylinder (31). A first through hole is provided on the first protective sleeve (33). The telescopic rod of the second cylinder (31) is fixedly connected to a first positioning pin (34). The first positioning pin (34) passes through the first through hole.

4. The welding fixture for a battery box according to claim 1, characterized in that, Each of the third clamping components includes two third clamping parts (4), which are arranged sequentially and symmetrically along the width direction of the base (1); each of the third clamping parts (4) includes a third cylinder (41), a first limiting block (42), a second limiting block (43) and a third support block (44). The third cylinder (41) is fixedly mounted on the base (1), and the telescopic rod of the third cylinder (41) is fixedly connected to the mounting plate (45). The mounting plate (45) is fixedly mounted with a first lifting plate (46) and a second lifting plate (47). The first limiting block (42) is fixedly mounted on the first lifting plate (46), and the second limiting block (43) and the third support block (44) are fixedly mounted on the second lifting plate (47). The third support block (44) is located between the first limiting block (42) and the second limiting block (43). The second lifting plate (47) is fixedly mounted with a second positioning pin (48).

5. The welding fixture for a battery box according to claim 1, characterized in that, Each of the fourth pressing components (5) includes a fourth cylinder (51) and two fourth support blocks (52). The fourth cylinder (51) is fixedly mounted on the base (1). A fixed frame (53) is fixedly mounted on the top of the fourth cylinder (51). The telescopic rod of the fourth cylinder (51) passes through the fixed frame (53) and is fixedly connected to the connecting rod (54). A movable block (541) is fixedly mounted on the connecting rod (54). A limit groove is provided on the fixed frame (53). The movable block (541) is slidably mounted in the limit groove. The two ends of the connecting rod (54) are rotatably connected to one end of each of the two transmission frames (542). The other end of the moving frame (542) is rotatably connected to the bottom of the two rotating plates (55). The lower parts of the two rotating plates (55) are rotatably mounted on the fixed frame (53). The tops of the two rotating plates (55) extend out of the fixed frame (53) and are fixedly connected to the clamping plate (56). Two clamps (561) are fixedly mounted on each clamping plate (56). A V-shaped support plate (531) is fixedly mounted on the top of the fixed frame (53). Two fourth support blocks (52) are fixedly mounted at both ends of the V-shaped support plate (531). The V-shaped support plate (531) and the two fourth support blocks (52) are located between the two clamping plates (56).

6. The welding fixture for a battery box according to claim 5, characterized in that, Each of the fourth clamping components (5) further includes two fifth cylinders (57) fixedly mounted on the base (1). The fourth cylinder (51) is located between the two fifth cylinders (57). A second protective sleeve (58) is fixedly mounted on the top of each fifth cylinder (57). A second through hole is provided on the second protective sleeve (58). The telescopic rod of the fifth cylinder (57) is fixedly connected to a third positioning pin (59). The third positioning pin (59) passes through the second through hole.

7. The welding fixture for a battery box according to claim 1, characterized in that, The fifth clamping assembly includes two fifth clamping parts (6), which are symmetrically arranged along the width direction of the base (1). Each fifth clamping part (6) includes a first welding clamping cylinder (61) and a first pressure plate (62). The first welding clamping cylinder (61) is fixedly arranged on the base (1), and the clamping arm of the first welding clamping cylinder (61) is fixedly connected to the first pressure plate (62). The first pressure plate (62) is U-shaped, and a first pressure block (63) is fixedly arranged on the first pressure plate (62).

8. The welding fixture for a battery box according to claim 1, characterized in that, The sixth clamping assembly includes two sixth clamping parts (7), which are symmetrically arranged along the width direction of the base (1). Each sixth clamping part (7) includes a second welding clamping cylinder (71) and a second pressure plate (72). The second welding clamping cylinder (71) is fixedly arranged on the base (1), and the clamping arm of the second welding clamping cylinder (71) is fixedly connected to the second pressure plate (72). The second pressure plate (72) is U-shaped, and a second pressure block (73) is fixedly arranged on the second pressure plate (72).

9. The welding fixture for a battery box according to claim 1, characterized in that, The seventh clamping assembly includes two seventh clamping parts (8), which are symmetrically arranged along the width direction of the base (1). Each seventh clamping part (8) includes a third welding clamping cylinder (81) and a third pressure plate (82). The third welding clamping cylinder (81) is fixedly arranged on the base (1), and the clamping arm of the third welding clamping cylinder (81) is fixedly connected to the third pressure plate (82). A third pressure block (83) is fixedly arranged on the third pressure plate (82).

10. The welding fixture for a battery box according to claim 1, characterized in that, The upper pressing mechanism also includes a positioning component, which includes two positioning parts (9) symmetrically arranged along the width direction of the base (1). Each positioning part (9) includes a positioning plate (91), a positioning cylinder (92), and a sliding plate (93). The positioning plate (91) is fixedly arranged on the base (1). The positioning plate (91) has a groove, and a slide rail (911) is fixedly arranged in the groove. A slider (912) is slidably arranged on the slide rail (911). The sliding plate (93) is fixedly arranged on the slider (912). The positioning cylinder (92) is fixedly arranged on the positioning plate (91). The telescopic rod of the positioning cylinder (92) is fixedly connected to the sliding plate (93). A stand (94) is fixedly arranged on the sliding plate (93), and a positioning column (95) is fixedly arranged on the stand (94).

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