Automatic welding device for electric automobile part machining

Abstract

The invention belongs to the technical field of electric automobile part welding, particularly relates to an automatic welding device for electric automobile part machining, and aims to solve the problem that an electrode plate needs to be manually placed during welding in the background technology, according to the following scheme, the automatic welding device comprises a machine base, and the outer wall of the top of the machine base is fixedly connected with a supporting frame through bolts; a guide rail assembly is installed on the outer wall of the top of the supporting frame, a plate base is fixedly connected to the outer wall of the guide rail assembly, a first connecting frame is welded to the outer wall of one side of the plate base, a feeding assembly is arranged on the outer wall of the bottom of the first connecting frame, and a second connecting frame is welded to the outer wall of one side of the feeding assembly. A welding auxiliary assembly is arranged on the outer wall of the second connecting frame, and a plasma welding assembly is arranged on the outer wall of the plate base. Through cooperation of the feeding assembly, the welding auxiliary assembly and the plasma welding assembly, automatic and accurate feeding and positioning of the electrode plates can be achieved, manual intervention is not needed, and the automation degree is high.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle component welding, and particularly to an automated welding device for electric vehicle component processing. Background Art

[0002] The storage battery is the core energy storage unit of an electric vehicle, and its performance directly determines the vehicle's endurance, power output, and overall reliability. Modern electric vehicles mostly use lithium-ion battery packs, which are composed of multiple single cells (electrochemical cells) connected in series or in parallel. Positive and negative electrode plates are provided on the top of each single cell for connecting conductive bars to achieve current transmission and distribution. The welding quality of the electrode plates is crucial. If the welding is not firm or the position is offset, it will cause an increase in contact resistance, local overheating, and even pose a safety hazard. Therefore, the precise positioning and efficient welding of the electrode plates are key links in the battery assembly process.

[0003] The traditional welding of battery electrode plates mostly relies on manual operation, which specifically shows the following problems:

[0004] The electrode plates need to be picked up one by one by the operator and manually placed at the designated position of the battery. This process has a high repetition rate, a large labor intensity, and is prone to positioning errors due to fatigue. Manually placing the electrode plates takes a long time, making it difficult to meet the requirements of large-scale production. Moreover, manual operation is difficult to ensure the complete alignment of the electrode plates with the conductive bars, and it is easy to have false soldering or dislocation after welding, affecting the overall performance of the battery pack. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an automated welding device for electric vehicle component processing, which overcomes the deficiencies of the prior art and effectively solves the problem of manually placing electrode plates during welding.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An automated welding device for the processing of electric vehicle parts, comprising a machine base. The outer wall of the top of the machine base is fixedly connected by bolts to a support frame, and a guide rail assembly is installed on the outer wall of the top of the support frame. A plate seat is fixedly connected to the outer wall of the guide rail assembly, and a first connecting frame is welded to the outer wall of one side of the plate seat. A feeding assembly is arranged on the outer wall of the bottom of the first connecting frame. A second connecting frame is welded to the outer wall of one side of the feeding assembly, and a welding auxiliary assembly is arranged on the outer wall of the second connecting frame. A plasma welding assembly is arranged on the outer wall of the plate seat. The welding auxiliary assembly includes a second cylinder fixedly connected to the outer wall of one side of the second connecting frame by screws, a flat push plate fixedly connected to the piston rod of the second cylinder, symmetrically distributed horizontal insertion bars rotatably connected to the outer wall of one side of the flat push plate, hooks rotatably connected to the outer wall of one end of the horizontal insertion bars, a first spring fixedly connected between the horizontal insertion bars and the hooks, an I-shaped plate welded to the outer wall of one side of the flat push plate, and a second spring fixedly connected between the I-shaped plate and the horizontal insertion bars;

[0008] The plasma welding assembly includes a third cylinder fixedly connected to the outer wall of the top of the plate seat by screws, a lifting plate fixedly connected to the piston rod of the third cylinder, a vertical plate welded to the outer wall of the bottom of the lifting plate, a connecting plate slidably connected to the outer wall of one side of the vertical plate, blanking traction rods welded to the outer walls of both sides of the connecting plate, and a plasma welding machine installed on the outer wall of the top of the lifting plate.

[0009] Preferably, the plasma welding assembly further includes a guide rod, a third spring and a laser guiding plate. Among them, the guide rod is fixedly connected to the outer wall of the top of the connecting plate, and the guide rod is slidably connected to the outer wall of one side of the vertical plate. The third spring is fixedly connected between the connecting plate and the vertical plate, and the third spring is located outside the guide rod. The laser guiding plate is fixedly connected to the outer wall of one side of the connecting plate by screws.

[0010] Preferably, the lifting plate is slidably connected to the outer wall of the other side of the plate seat, and the laser guiding plate is located below the plasma welding machine. The blanking traction rod is located above the horizontal insertion bar, and the blanking traction rod includes an L-shaped plate and a lower inclined plate. Among them, the distance between the two lower inclined plates is less than the distance between the two horizontal insertion bars.

[0011] Preferably, the guide rail assembly includes a first electric guide rail, a second electric guide rail and a slide rail. Among them, sliders are arranged on the outer walls of the tops of the first electric guide rail, the second electric guide rail and the slide rail. The first electric guide rail is fixedly connected to one side of the outer wall of the top of the support frame by screws. A cross bar is fixedly connected to the outer wall of the bottom of the second electric guide rail by screws, and the cross bar is fixedly connected to the slider of the first electric guide rail. The slide rail is fixedly connected to the other side of the outer wall of the top of the support frame by screws, and the other end outer wall bottom of the cross bar away from the slide rail is slidably connected to the slider of the slide rail.

[0012] Preferably, the feeding assembly includes a stacking rack, a first cylinder, a push rod, and a feeding plate. Among them, the feeding plate is welded to the top outer wall of the first connecting frame, the stacking rack is welded to one outer wall of the feeding plate, the first cylinder is fixedly connected to one outer wall of the stacking rack by screws, and the push rod is fixedly connected to the piston rod of the first cylinder.

[0013] Preferably, the feeding assembly further includes a sliding groove, and the push rod is slidably connected to the inner wall of the sliding groove.

[0014] Preferably, the feeding assembly further includes a guiding groove, and the guiding groove is opened on the bottom outer wall of the feeding plate. The width dimension of the guiding groove is adapted to the width dimension of the hook.

[0015] Preferably, a battery placement table is placed on the top outer wall of the machine base, and an array of storage batteries is placed on the inner wall of the battery placement table. Electrodes are provided on both sides of the top outer wall of the storage battery, and conductive bars are welded to the electrodes by a plasma welding machine. The conductive bars are installed on the top outer wall of the storage battery, and the inner wall corners of the stacking rack are adapted to the size of the electrodes.

[0016] Preferably, symmetrically distributed positioning angle codes are welded to the top outer wall of the machine base, and the positioning angle codes are closely attached to the bottom four corners of the battery placement table.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the automatic welding device for processing electric vehicle parts of the present invention, through the coordinated work of the stacking rack, the first cylinder, the push rod and the feeding plate in the feeding assembly, the continuous supply of the electrodes is realized, and the size adaptation design of the guiding groove and the hook can ensure the accurate positioning of the electrodes during the material taking process and avoid deviation;

[0019] 2. For the automatic welding device for processing electric vehicle parts of the present invention, the linkage design of the horizontal insertion bar and the blanking traction rod ensures that the electrodes are stably clamped and released before welding, avoiding vibration or displacement;

[0020] 3. For the automatic welding device for processing electric vehicle parts of the present invention, through the coordinated cooperation of the feeding assembly, the welding auxiliary assembly and the plasma welding assembly, the automatic and accurate feeding and positioning of the electrodes can be realized, without manual intervention, and the degree of automation is high. Description of the Drawings

[0021] Figure 1 Schematic diagram of the overall structure of an automatic welding device for processing electric vehicle parts proposed by the present invention Figure 1 ;

[0022] Figure 2Schematic diagram of the overall structure of an automated welding device for processing electric vehicle parts proposed by the present invention Figure 2 ;

[0023] Figure 3 Schematic diagram of the plate seat connection structure of an automated welding device for processing electric vehicle parts proposed by the present invention Figure 1 ;

[0024] Figure 4 Schematic diagram of the plate seat connection structure of an automated welding device for processing electric vehicle parts proposed by the present invention Figure 2 ;

[0025] Figure 5 Schematic diagram of the welding auxiliary component of an automated welding device for processing electric vehicle parts proposed by the present invention;

[0026] Figure 6 Schematic diagram of the plasma welding component of an automated welding device for processing electric vehicle parts proposed by the present invention;

[0027] Figure 7 Schematic diagram of the feeding component of an automated welding device for processing electric vehicle parts proposed by the present invention;

[0028] Figure 8 Schematic diagram when the hook of an automated welding device for processing electric vehicle parts is about to pick up the electrode sheet;

[0029] Figure 9 Schematic diagram when the horizontal insert bar of an automated welding device for processing electric vehicle parts unfolds and places the electrode sheet.

[0030] In the figure: 1, machine base; 2, support frame; 3, guide rail assembly; 31, first electric guide rail; 32, second electric guide rail; 33, slide rail; 4, plate seat; 5, first connecting frame; 6, feeding component; 61, stacking rack; 62, first cylinder; 63, push rod; 64, blanking plate; 65, guiding groove; 66, sliding groove; 7, second connecting frame; 8, welding auxiliary component; 81, second cylinder; 82, flat push plate; 83, horizontal insert bar; 84, hook; 85, first spring; 86, I-shaped plate; 87, second spring; 9, plasma welding component; 91, third cylinder; 92, lifting plate; 93, vertical plate; 94, connecting plate; 95, blanking traction rod; 96, plasma welding machine; 97, guide rod; 98, third spring; 99, laser guiding plate; 10, battery placement table; 11, storage battery; 12, electrode sheet; 13, conductive bar; 14, positioning angle code. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0032] Referring to Figures 1-9 , an automated welding device for processing electric vehicle parts, including a machine base 1. The outer wall of the top of the machine base 1 is fixedly connected to a support frame 2 by bolts, and a guide rail assembly 3 is installed on the outer wall of the top of the support frame 2. A plate seat 4 is fixedly connected to the outer wall of the guide rail assembly 3, and a first connecting frame 5 is welded to the outer wall of one side of the plate seat 4. A feeding assembly 6 is arranged on the outer wall of the bottom of the first connecting frame 5. A second connecting frame 7 is welded to the outer wall of one side of the feeding assembly 6, and a welding auxiliary assembly 8 is arranged on the outer wall of the second connecting frame 7. A plasma welding assembly 9 is arranged on the outer wall of the plate seat 4.

[0033] Embodiment 1, the welding auxiliary assembly 8 includes a second cylinder 81 fixedly connected to the outer wall of one side of the second connecting frame 7 by screws, a flat push plate 82 fixedly connected to the piston rod of the second cylinder 81, symmetrically distributed horizontal insertion bars 83 rotatably connected to the outer wall of one side of the flat push plate 82, hooks 84 rotatably connected to the outer wall of one end of the horizontal insertion bars 83, a first spring 85 fixedly connected between the horizontal insertion bars 83 and the hooks 84, an I-shaped plate 86 welded to the outer wall of one side of the flat push plate 82, and a second spring 87 fixedly connected between the I-shaped plate 86 and the horizontal insertion bars 83.

[0034] In this embodiment, the second cylinder 81 pushes the flat push plate 82 forward, driving the horizontal insertion bars 83 to move to the bottom of the feeding plate 64. The hook 84 at one end of the horizontal insertion bar 83 will abut against the bottom outer wall of the electrode sheet 12 on the feeding plate 64 and slide obliquely. As the hook 84 passes through the electrode sheet 12, the first spring 85 will reset the hook 84, and the hook 84 will lean against one side of the electrode sheet 12, and the electrode sheet 12 will be transferred to the top of the horizontal insertion bar 83. When the welding auxiliary assembly 8 moves to the welding position, the lower inclined plate of the blanking traction rod 95 moves downward and contacts the horizontal insertion bar 83, forcing the horizontal insertion bar 83 to open, thereby releasing the electrode sheet 12 to the welding position on the upper surface of the storage battery 11.

[0035] Embodiment 2. The plasma welding assembly 9 includes a third cylinder 91 fixedly connected to the top outer wall of the plate base 4 by screws, a lifting plate 92 fixedly connected to the piston rod of the third cylinder 91, a vertical plate 93 welded to the bottom outer wall of the lifting plate 92, a connecting plate 94 slidably connected to the outer wall of one side of the vertical plate 93, blanking traction rods 95 welded to the outer walls on both sides of the connecting plate 94, and a plasma welding machine 96 installed on the top outer wall of the lifting plate 92. The plasma welding assembly 9 further includes a guide rod 97, a third spring 98, and a laser guiding plate 99. Among them, the guide rod 97 is fixedly connected to the top outer wall of the connecting plate 94 and is slidably connected to the outer wall of one side of the vertical plate 93. The third spring 98 is fixedly connected between the connecting plate 94 and the vertical plate 93 and is located outside the guide rod 97. The laser guiding plate 99 is fixedly connected to the outer wall of one side of the connecting plate 94 by screws. The lifting plate 92 is slidably connected to the outer wall of the other side of the plate base 4, and the laser guiding plate 99 is located below the plasma welding machine 96. The blanking traction rods 95 are located on the top of the horizontal insertion strips 83, and the blanking traction rods 95 include an L-shaped plate and a lower inclined plate. Among them, the distance between the two lower inclined plates is smaller than the distance between the two horizontal insertion strips 83.

[0036] In this embodiment, the third cylinder 91 drives the lifting plate 92 to move up and down, driving the vertical plate 93 and the connecting plate 94 to adjust the welding height. The cooperation of the guide rod 97 and the third spring 98 ensures that the connecting plate 94 buffers vibrations during the welding process. The laser guiding plate 99 is located below the plasma welding machine 96, assisting the plasma welding machine 96 to complete the high-precision welding of the electrode plate 12 and the conductive bar 13 along the preset path.

[0037] The guide rail assembly 3 includes a first electric guide rail 31, a second electric guide rail 32, and a slide rail 33. Among them, sliders are provided on the top outer walls of the first electric guide rail 31, the second electric guide rail 32, and the slide rail 33. The first electric guide rail 31 is fixedly connected to one side of the top outer wall of the support frame 2 by screws. A cross arm is fixedly connected to the bottom outer wall of the second electric guide rail 32 by screws, and the cross arm is fixedly connected to the slider of the first electric guide rail 31. The slide rail 33 is fixedly connected to the other side of the top outer wall of the support frame 2 by screws, and the bottom of the other end outer wall of the cross arm away from the slide rail 33 is slidably connected to the slider of the slide rail 33.

[0038] The first electric guide rail 31 drives the cross arm to move horizontally. The cross arm is fixedly connected to the second electric guide rail 32. As the second electric guide rail 32 drives the plate base 4 to move, the two-dimensional planar movement of the plate base 4 is realized. The slide rail 33 serves as an auxiliary guiding mechanism to ensure the stability of the cross arm movement and avoid deviation.

[0039] Embodiment 3. The feeding assembly 6 includes a stacking rack 61, a first cylinder 62, a push rod 63, and a blanking plate 64. Among them, the blanking plate 64 is welded to the top outer wall of the first connecting frame 5, the stacking rack 61 is welded to one side outer wall of the blanking plate 64, the first cylinder 62 is fixedly connected to one side outer wall of the stacking rack 61 by screws, and the push rod 63 is fixedly connected to the piston rod of the first cylinder 62. The feeding assembly 6 further includes a chute 66, and the push rod 63 is slidably connected to the inner wall of the chute 66. The feeding assembly 6 further includes a guiding groove 65, and the guiding groove 65 is opened on the bottom outer wall of the blanking plate 64. The width dimension of the guiding groove 65 is adapted to the width dimension of the hanging hook 84.

[0040] Electrode plates 12 to be welded are stacked in the stacking rack 61. The first cylinder 62 drives the bottom inner wall in the middle. The width of the guiding groove 65 matches the size of the hanging hook 84 to ensure that the hanging hook 84 can smoothly pull back the electrode plate 12.

[0041] A battery placement table 10 is placed on the top outer wall of the machine base 1, and an array of storage batteries 11 is placed on the inner wall of the battery placement table 10. Electrodes 12 are provided on both sides of the top outer wall of the storage battery 11, and a conductive bar 13 is welded to the electrode 12 by a plasma welding machine 96. The conductive bar 13 is installed on the top outer wall of the storage battery 11, and the inner wall corner dimensions of the stacking rack 61 are adapted to the dimensions of the electrode plate 12.

[0042] The machine base 1 serves as the load-bearing body of the device. Symmetrically distributed positioning angle codes 14 are welded to the top of the machine base 1 for fixing the battery placement table 10. The battery placement table 10 can accommodate multiple groups of storage batteries 11 to ensure the fixed position of the storage batteries 11 during the welding process.

[0043] Working principle:

[0044] Loading of the electrode plate 12: The operator stacks a batch of electrode plates 12 in the stacking rack 61, and the first cylinder 62 drives the push rod 63 to push the lowermost electrode plate 12 into the blanking plate 64 to complete the preliminary positioning.

[0045] Clamping and conveying: The horizontal insertion bars 83 of the welding auxiliary assembly 8 are transferred to both sides of the bottom of the electrode plate 12 under the push of the second cylinder 81. The hanging hook 84 will abut against the bottom outer wall of the electrode plate 12, forcing the hanging hook 84 to slide obliquely. As the hanging hook 84 passes through the electrode plate 12, the first spring 85 will reset the hanging hook 84. After that, after the second cylinder 81 retracts the piston rod, the electrode plate 12 will be transferred to the top outer walls of the two horizontal insertion bars 83, and the hanging hook 84 will be close to the electrode plate 12.

[0046] Electrode sheet 12 release: The guide rail assembly 3 drives the plate seat 4 to move above the storage battery 11. When the plate seat 4 reaches the welding position, the third air cylinder 91 drives the blanking traction rod 95 to move downward. At this time, the lower inclined plate of the blanking traction rod 95 will squeeze the horizontal insertion bar 83, forcing the horizontal insertion bar 83 to open, and the electrode sheet 12 accurately falls to the designated position of the storage battery 11.

[0047] Welding execution: The lifting plate 92 of the plasma welding assembly 9 continues to descend, the laser guiding plate 99 assists in positioning the welding path, and the plasma welding machine 96 emits a high-energy arc to complete the welding of the electrode sheet 12 and the conductive bar 13.

[0048] Reset and cycle: After welding is completed, each component resets, the guide rail assembly 3 transfers the position of the plate seat 4, and the feeding assembly 6 pushes the next electrode sheet 12 to enter the next cycle.

[0049] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An automated welding device for processing electric vehicle parts, comprising a machine base (1), characterized in that, The outer wall of the top of the machine base (1) is fixedly connected with a support frame (2) through bolts, and a guide rail assembly (3) is installed on the outer wall of the top of the support frame (2). A plate seat (4) is fixedly connected to the outer wall of the guide rail assembly (3), and a first connecting frame (5) is welded to the outer wall of one side of the plate seat (4). A feeding assembly (6) is arranged on the outer wall of the bottom of the first connecting frame (5). A second connecting frame (7) is welded to the outer wall of one side of the feeding assembly (6), and a welding auxiliary assembly (8) is arranged on the outer wall of the second connecting frame (7). A plasma welding assembly (9) is arranged on the outer wall of the plate seat (4). The welding auxiliary assembly (8) includes a second air cylinder (81) fixedly connected to the outer wall of one side of the second connecting frame (7) through screws, a flat pushing plate (82) fixedly connected to the piston rod of the second air cylinder (81), symmetrically distributed horizontal insertion bars (83) rotatably connected to the outer wall of one side of the flat pushing plate (82), hooks (84) rotatably connected to the outer wall of one end of the horizontal insertion bars (83), a first spring (85) fixedly connected between the horizontal insertion bars (83) and the hooks (84), an I-shaped plate (86) welded to the outer wall of one side of the flat pushing plate (82), and a second spring (87) fixedly connected between the I-shaped plate (86) and the horizontal insertion bars (83). The plasma welding assembly (9) includes a third air cylinder (91) fixedly connected to the outer wall of the top of the plate seat (4) through screws, a lifting plate (92) fixedly connected to the piston rod of the third air cylinder (91), a vertical plate (93) welded to the outer wall of the bottom of the lifting plate (92), a connecting plate (94) slidably connected to the outer wall of one side of the vertical plate (93), blanking traction rods (95) welded to the outer walls of both sides of the connecting plate (94), and a plasma welding machine (96) installed on the outer wall of the top of the lifting plate (92).

2. The automated welding device for processing electric vehicle parts according to claim 1, wherein, The plasma welding assembly (9) further includes a guide rod (97), a third spring (98), and a laser guiding plate (99). Among them, the guide rod (97) is fixedly connected to the outer wall of the top of the connecting plate (94), and the guide rod (97) is slidably connected to the outer wall of one side of the vertical plate (93). The third spring (98) is fixedly connected between the connecting plate (94) and the vertical plate (93), and the third spring (98) is located outside the guide rod (97). The laser guiding plate (99) is fixedly connected to the outer wall of one side of the connecting plate (94) through screws.

3. An automated welding device for processing electric vehicle parts according to claim 1, characterized in that, The lifting plate (92) is slidably connected to the outer wall of the other side of the plate seat (4), and the laser guiding plate (99) is located below the plasma welding machine (96). The blanking traction rods (95) are located above the horizontal insertion bars (83), and the blanking traction rods (95) include an L-shaped plate and a lower inclined plate. Among them, the distance between the two lower inclined plates is smaller than the distance between the two horizontal insertion bars (83).

4. An automated welding device for processing electric vehicle parts according to claim 1, characterized in that, The guide rail assembly (3) includes a first electric guide rail (31), a second electric guide rail (32) and a slide rail (33). Among them, sliders are provided on the outer walls of the tops of the first electric guide rail (31), the second electric guide rail (32) and the slide rail (33). The first electric guide rail (31) is fixedly connected to one side of the outer wall of the top of the support frame (2) by screws. A cross arm is fixedly connected to the outer wall of the bottom of the second electric guide rail (32) by screws, and the cross arm is fixedly connected to the slider of the first electric guide rail (31). The slide rail (33) is fixedly connected to the other side of the outer wall of the top of the support frame (2) by screws, and the bottom of the outer wall of the other end of the cross arm away from the slide rail (33) is slidably connected to the slider of the slide rail (33).

5. An automated welding device for processing electric vehicle parts according to claim 1, characterized in that, The feeding assembly (6) includes a stacking rack (61), a first cylinder (62), a push rod (63), and a blanking plate (64). Among them, the blanking plate (64) is welded to the outer wall of the top of the first connecting frame (5). The stacking rack (61) is welded to one side outer wall of the blanking plate (64). The first cylinder (62) is fixedly connected to one side outer wall of the stacking rack (61) by screws. The push rod (63) is fixedly connected to the piston rod of the first cylinder (62).

6. An automated welding device for the processing of electric vehicle parts according to claim 1, characterized in that, The feeding assembly (6) further includes a chute (66), and the push rod (63) is slidably connected to the inner wall of the chute (66).

7. An automated welding device for processing electric vehicle parts according to claim 1, characterized in that, The feeding assembly (6) further includes a guiding groove (65), and the guiding groove (65) is opened on the outer wall of the bottom of the blanking plate (64). The width dimension of the guiding groove (65) is adapted to the width dimension of the hook (84).

8. An automated welding device for processing electric vehicle parts according to claim 1, characterized in that, A battery placement table (10) is placed on the outer wall of the top of the machine base (1), and an array of storage batteries (11) is placed on the inner wall of the battery placement table (10). Electrodes (12) are provided on both sides of the outer wall of the top of the storage battery (11), and a conductive bar (13) is welded to the electrodes (12) by a plasma welding machine (96). The conductive bar (13) is installed on the outer wall of the top of the storage battery (11), and the inner wall corner dimensions of the stacking rack (61) are adapted to the dimensions of the electrodes (12).

9. An automated welding device for processing electric vehicle parts according to claim 1, characterized in that, Symmetrically distributed positioning angle codes (14) are welded to the outer wall of the top of the machine base (1), and the positioning angle codes (14) are closely attached to the bottom four corners of the battery placement table (10).

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