New energy vehicle battery box corner plate automatic spot welding machine

Abstract

The invention discloses an automatic spot welding machine for corner guards of a battery box of a new energy vehicle, which belongs to the technical field of battery box welding. The machine comprises a workbench which is slidably provided on the machine, a welding table which is rotatably installed on the workbench, two first sliding bars and two second sliding bars which are slidably provided on the welding table, and the four of them form a rectangle with variable side lengths, sliding seats are respectively provided at the four corners of the rectangle, and each sliding seat is respectively slidably connected with the first sliding bar and the second sliding bar corresponding to it, a supporting angle plate and a right-angled angle plate are fixedly provided on the top of each workbench sliding seat, a driving shaft is rotatably connected at the center of the welding table, and when the welding table slides to the welding area, the driving shaft can rotate automatically, and the driving shaft is respectively linked with the two first sliding bars and the two second sliding bars, so that the four angle plates automatically clamp the battery box and the corner guard during welding, and there is no need to clamp them one by one manually, which greatly reduces manual operation and has high work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of battery box welding, and in particular to an automatic spot welding machine for corner guard plates of a battery box of a new energy vehicle. Background Art

[0002] The battery box of a new energy vehicle is an important part of its battery pack and is usually made of metal welding. Figure 1 As shown, in order to increase the corner strength of the battery box 100, it is often necessary to weld corner guards 101 at the four corners of the battery box 100. Currently, there is a lack of dedicated automated equipment for the welding of such corner guards 101. In traditional welding technology, multiple corner guards 101 need to be clamped one by one on the battery box 100 manually. The clamping operation is complicated, and thus there is a problem of low welding efficiency. Summary of the invention

[0003] In response to the above technical problems, the present invention provides an automatic spot welding machine for corner guards of battery boxes of new energy vehicles, which can efficiently and conveniently clamp battery boxes and corner guards and automatically perform welding.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] An automatic spot welding machine for corner guards of a battery box of a new energy vehicle comprises a machine platform, a Y-axis motor and a workbench thereon, wherein the Y-axis motor drives the workbench to slide along the Y direction through a screw rod, a welding platform is installed on the workbench, two first sliding bars are arranged in parallel along a horizontal direction on the welding platform, and two second sliding bars are arranged in parallel along another horizontal direction, wherein the first sliding bars are perpendicular to the length direction of the second sliding bars, the first sliding bars are slidably connected to the welding platform along the length direction of the second sliding bars, and the second sliding bars are slidably connected to the welding platform along the length direction of the first sliding bars;

[0006] A sliding seat is provided at the intersection of the two first sliding bars and the two second sliding bars, and each sliding seat is slidably connected to the corresponding first sliding bar and second sliding bar, and a supporting angle plate is fixed on the top of each sliding seat, and a right-angled angle plate is fixed on the top of each supporting angle plate;

[0007] The center position of the welding table is vertically connected to a driving shaft, the driving shaft is fixedly connected to a first driving disk and a second driving disk, the driving shaft is rotatably connected to a first driven disk and a second driven disk, a first annular spring is provided between the first driving disk and the first driven disk, and a second annular spring is provided between the second driving disk and the second driven disk;

[0008] A first connecting rod is respectively provided between the first driven disk and the two first sliding rods, one end of the first connecting rod is hinged to the first driven disk, and the other end is hinged to the corresponding first sliding rod;

[0009] A second connecting rod is respectively provided between the second driven disk and the two second sliding rods. One end of the second connecting rod is hinged to the second driven disk, and the other end is hinged to the corresponding second sliding rod.

[0010] As a preferred technical solution, a slot plate is fixedly provided on the machine platform along the Y direction, and a limit slot is provided on the slot plate, and the limit slot includes a first horizontal slot, an inclined slot and a second horizontal slot connected in sequence, and the second horizontal slot is higher than the first horizontal slot;

[0011] The bottom of the welding platform is slidably connected with a sleeve along the axis of the driving shaft, and the sleeve and the welding platform are rotationally limited, the driving shaft is threadedly connected to the sleeve through the large lead angle thread thereon, the lower end of the sleeve is connected with a push rod, the lower end of the push rod is fixedly connected with a wheel fork, the wheel fork is rotatably connected with a roller, and the roller is rollingly matched with the limiting groove.

[0012] As a preferred technical solution, a hollow shaft is fixedly connected to the bottom of the welding table along the axis of the driving shaft, the hollow shaft is rotatably connected to the workbench, and a rotating motor is provided on the workbench to drive the hollow shaft to rotate.

[0013] As a preferred technical solution, a worm wheel is fixedly connected to the hollow shaft, a worm is fixedly connected to the power output shaft of the rotating motor, and the worm wheel is meshed with the worm.

[0014] As a preferred technical solution, the shaft sleeve is rotatably connected to the push rod, and the inner wall of the wheel fork is slidably fitted to the groove plate.

[0015] As a preferred technical solution, a gantry is fixedly connected to the machine platform, an X-axis motor and a headstock are arranged on the upper part of the gantry, and the X-axis motor drives the headstock to slide along the X direction through a screw rod;

[0016] The headstock is provided with a Z-axis motor and a head, and the Z-axis motor drives the head to slide along the Z direction through a screw rod;

[0017] A first cylinder and a second cylinder are arranged opposite to each other at the bottom of the machine head. A first electrode rod is fixedly connected to the telescopic rod of the first cylinder, and a second electrode rod is fixedly connected to the telescopic rod of the second cylinder.

[0018] The present invention adopts the above technical solution, and has the following advantages compared with the prior art:

[0019] The automatic spot welding machine for the corner guard of the battery box of new energy vehicles can not only realize automatic welding, but also facilitate clamping and disassembly operations. The operator only needs to place the corner guards to be welded on the inner sides of the four angle plates, and place the battery box on the angle plates. When the welding station enters the welding area, the four angle plates can automatically clamp the four corners of the battery box, press the corner guards and the battery box tightly, and center the battery box at the same time. After welding is completed, the welding station can automatically release the battery box after leaving the welding area, which greatly reduces manual operation and has high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a battery box and a corner guard plate thereon in the prior art;

[0021] Figure 2 It is a structural schematic diagram of an automatic spot welding machine for corner guard plates of a battery box of a new energy vehicle in the present invention;

[0022] Figure 3 for Figure 2 The effect picture of the automatic spot welding machine for the corner guard of the battery box of new energy vehicles;

[0023] Figure 4 for Figure 2 Partial structural diagram of the automatic spot welding machine for the corner guard of the battery box of new energy vehicles;

[0024] Figure 5 for Figure 2 Another part of the structural diagram of the automatic spot welding machine for the corner guard of the battery box of new energy vehicles;

[0025] Figure 6 for Figure 5 Bottom view of the middle structure;

[0026] Figure 7 for Figure 5 A schematic diagram of the structure of the middle drive shaft, sleeve and push rod;

[0027] Figure 8 for Figure 7 Exploded view of the structure in the figure (the dotted lines in the figure are assembly guide lines).

[0028] In the figure,

[0029] 10-machine table; 11-Y-axis motor; 12-slot plate; 121-limiting slot; 1211-first horizontal slot; 1212-oblique slot; 1213-second horizontal slot; 20-gantry; 21-X-axis motor; 30-machine head seat; 31-Z-axis motor; 40-machine head; 41-first cylinder, 42-first electrode rod; 43-second cylinder; 44-second electrode rod; 50-workbench; 51-rotating motor; 52-worm; 60-welding table; 61-hollow shaft; 62-worm gear ; 63-first slide bar; 64-second slide bar; 65-slide seat; 651-angle support plate; 652-angle plate; 70-drive shaft; 71-large lead angle thread; 72-first drive disk; 73-first annular spring; 74-first driven disk; 75-first connecting rod; 76-second drive disk; 77-second annular spring; 78-second driven disk; 79-second connecting rod; 80-bushing; 90-push rod; 91-wheel fork; 92-roller; 100-battery box; 101-corner plate. DETAILED DESCRIPTION

[0030] The specific implementation methods of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0031] like Figure 2-Figure 8 As shown, an automatic spot welding machine for corner guards of battery boxes of new energy vehicles includes a machine platform 10. For ease of description, the horizontal long side direction of the machine platform 10 is set as the Y direction, the horizontal short side direction of the machine platform 10 is set as the X direction, and the vertical direction is the Z direction. A gantry 20 is fixedly connected to the position of the machine platform 10 near one end of the Y direction. A headstock 30 is slidably installed on the upper crossbeam of the gantry 20 along the X direction, and an X-axis motor 21 is fixedly installed on the gantry 20. The X-axis motor 21 drives the headstock 30 to slide along the X direction through a screw rod. A workbench 50 is slidably installed on the machine platform 10 along the Y direction, and a Y-axis motor 11 is fixedly installed on the machine platform 10. The Y-axis motor 11 drives the workbench 50 along the X direction through a screw rod. The machine head 40 slides in the Y direction, and the machine head 40 is installed on the head base 30 for sliding in the Z direction, and a Z-axis motor 31 is fixedly installed on the head base 30. The Z-axis motor 31 drives the machine head 40 to slide in the Z direction through a screw rod. A first cylinder 41 and a second cylinder 43 are relatively arranged at the bottom of the machine head 40. A first electrode rod 42 is fixedly connected to the telescopic rod of the first cylinder 41, and a second electrode rod 44 is fixedly connected to the telescopic rod of the second cylinder 43. The first electrode rod 42 and the second electrode rod 44 can be driven to move closer to or away from each other by the first cylinder 41 and the second cylinder 43. The first electrode rod 42 and the second electrode rod 44 cooperate with each other for spot welding workpieces. The specific spot welding principle belongs to the prior art and will not be repeated here.

[0032] A welding table 60 for clamping the battery box 100 is horizontally arranged above the workbench 50. A vertical hollow shaft 61 is fixedly connected to the bottom center position of the welding table 60. The hollow shaft 61 is rotatably connected to the workbench 50. A worm gear 62 is fixedly connected to the outside of the hollow shaft 61. A rotating motor 51 is fixedly installed on the workbench 50. A worm 52 is fixedly connected to the power output shaft of the rotating motor 51. The worm gear 62 is meshed with the worm 52. During the welding process, the welding table 60 is driven to rotate by the rotating motor 51, so that spot welding of different sides of the battery box 100 can be achieved in sequence.

[0033] Two first slide bars 63 are provided in parallel along a horizontal direction on the top surface of the welding platform 60, and two second slide bars 64 are provided in parallel along another horizontal direction. The length directions of the first slide bar 63 and the second slide bar 64 are perpendicular. The first slide bar 63 is slidably connected to the welding platform 60 along the length direction of the second slide bar 64, and the second slide bar 64 is slidably connected to the welding platform 60 along the length direction of the first slide bar 63. The two first slide bars 63 and the two second slide bars 64 together form a rectangle with variable side lengths. Slide seats 65 are respectively provided at the intersection of the two first slide bars 63 and the two second slide bars 64 (i.e., the four corners of the rectangle). Each slide seat 65 is slidably connected to the corresponding first slide bar 63 and the second slide bar 64 respectively. A supporting angle plate 651 is fixedly provided on the top of each slide seat 65, and a right-angled angle plate 652 is fixedly provided above each supporting angle plate 651. The inner angles of the four angle plates 652 are all facing the inside of the rectangle.

[0034] The center position of the welding table 60 is vertically connected to a driving shaft 70 for rotation. The rotational force of the driving shaft 70 can come from a power mechanism such as a motor and a cylinder, or can be twisted manually. The driving shaft 70 is coaxial with the hollow shaft 61. A first driving disk 72 and a second driving disk 76 are fixedly connected to the driving shaft 70. A first driven disk 74 and a second driven disk 78 are rotatably connected to the driving shaft 70. A first annular spring 73 is provided between the first driving disk 72 and the first driven disk 74, and a second annular spring 77 is provided between the second driving disk 76 and the second driven disk 78. A first connecting rod 75 is respectively provided between the first driven disk 74 and the two first sliding bars 63. One end of the first connecting rod 75 is hinged on the first driven disk 74, and the other end is hinged on the middle part of the corresponding first sliding bar 63. A second connecting rod 79 is respectively provided between the second driven disk 78 and the two second sliding bars 64. One end of the second connecting rod 79 is hinged on the second driven disk 78, and the other end is hinged on the middle part of the corresponding second sliding bar 64.

[0035] Preferably, a slot plate 12 is fixedly provided on the machine table 10 along the Y direction, and a limiting slot 121 is provided on the slot plate 12. The limiting slot 121 includes a first horizontal slot 1211, an inclined slot 1212, and a second horizontal slot 1213 which are connected in sequence, wherein the first horizontal slot 1211 is located at one end of the limiting slot 121 away from the machine head 40, and the second horizontal slot 1213 is located in the working area below the machine head 40, and the second horizontal slot 1213 is higher than the first horizontal slot 1211. The lower end of the drive shaft 70 extends into the inner cavity of the hollow shaft 61, and a shaft sleeve 80 is slidably connected to the lower port of the hollow shaft 61 along the axis of the drive shaft 70. As can be seen from the accompanying drawings, the shaft sleeve 80 has at least There is a plane outer wall, so that the sleeve 80 and the welding platform 60 are rotationally limited, that is, the sleeve 80 and the welding platform 60 can only slide relative to each other, and cannot rotate relative to each other. A large lead angle thread 71 is provided on the outer circumferential surface of the lower end of the driving shaft 70, and the lower end of the driving shaft 70 is threadedly connected to the sleeve 80 through the large lead angle thread 71 thereon. The lower end of the sleeve 80 is rotatably connected to a push rod 90 coaxial therewith, and the lower end of the push rod 90 is fixedly connected to a wheel fork 91. The inner wall of the wheel fork 91 slides and fits with the Y-direction vertical surface of the slot plate 12, thereby preventing the wheel fork 91 from rotating. A roller 92 is rotatably connected to the wheel fork 91, and the roller 92 rolls with the limiting groove 121 on the slot plate 12.

[0036] The working principle of the automatic spot welding machine for the corner guard of the battery box of a new energy vehicle is as follows: in the initial state, the workbench 50 is at one end of the machine table 10 away from the machine head 40, and the roller 92 is in the first horizontal groove 1211 in the limit groove 121. The operator needs to place a corner guard 101 to be welded on the inner side of the angle of the four angle plates 652, and then place the battery box 100 to be welded on the four supporting angle plates 651, and use the four supporting angle plates 651 to support the four corners of the battery box 100, and start the controller to control the X-axis motor 21, the Y-axis motor 11, the Z-axis motor 31, the rotary motor 51, and the first cylinder 41. The welding operation can be automatically performed by working with the second cylinder 43. It should be noted that when the Y-axis motor 11 drives the workbench 50 and the welding table 60 to approach the machine head 40 along the Y direction, the battery box 100 on the welding table 60 enters the working area, and the roller 92 gradually rolls to the second horizontal groove 1213 in the limiting groove 121, so that the position of the push rod 90 and the shaft sleeve 80 rises, and the driving shaft 70 is rotated under the action of the large-angle thread 71. The first driving disk 72 on the driving shaft 70 transmits the rotational force to the first driven disk 74 through the first annular spring 73, and the first driven disk 74 is connected to the two first connecting rods 75. The two first slide bars 63 are pulled closer to each other, and the second driving disk 76 on the driving shaft 70 transmits the rotational force to the second driven disk 78 through the second annular spring 77. The second driven disk 78 pulls the two second slide bars 64 closer to each other through the two second connecting rods 79, thereby making the four slide seats 65 gather inward, and the four corner plates 652 are used to clamp the four corners of the battery box 100, and the four corner plates 101 are also pressed against the battery box 100. Since the two first slide bars 63 slide synchronously, the battery box 100 can be centered along the length direction of the second slide bars 64, and since the two second slide bars 64 slide synchronously, the battery box 100 can be moved along the first The length direction of a slide bar 63 is centered, and the center position of the battery box 100 automatically coincides with the preset coordinate origin. The first annular spring 73 and the second annular spring 77 can be compressed so that the positions of the four angle plates 652 automatically adapt to the length and width of the battery box 100. When the rotating motor 51 drives the welding table 60 and the battery box 100 thereon to rotate, the height positions of the push rod 90 and the sleeve 80 remain unchanged, and there is no relative sliding between the sleeve 80 and the welding table 60. Therefore, there is no relative rotation between the drive shaft 70 and the welding table 60, so that the four angle plates 652 remain in a state of clamping the battery box 100.

[0037] After welding is completed, the Y-axis motor 11 reverses, driving the workbench 50 and the welding table 60 away from the machine head 40 along the Y direction. As the roller 92 gradually rolls to the first horizontal groove 1211 in the limiting groove 121, the position of the push rod 90 and the shaft sleeve 80 is lowered, and the driving shaft 70 reverses to make the four angle plates 652 automatically loosen the battery box 100, and the operator can directly remove the battery box 100 after welding.

[0038] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An automatic spot welding machine for corner guards of battery boxes of new energy vehicles, comprising a machine platform (10), a Y-axis motor (11) and a workbench (50) thereon, wherein the Y-axis motor (11) drives the workbench (50) to slide along the Y direction through a screw rod, and is characterized in that: A soldering platform (60) is installed on the workbench (50), and two first sliding bars (63) are arranged in parallel along a horizontal direction on the soldering platform (60), and two second sliding bars (64) are arranged in parallel along another horizontal direction, and the length directions of the first sliding bars (63) and the second sliding bars (64) are perpendicular, and the first sliding bars (63) are slidably connected to the soldering platform (60) along the length direction of the second sliding bars (64), and the second sliding bars (64) are slidably connected to the soldering platform (60) along the length direction of the first sliding bars (63); A sliding seat (65) is provided at the intersection of the two first sliding bars (63) and the two second sliding bars (64), and each sliding seat (65) is slidably connected to the corresponding first sliding bar (63) and second sliding bar (64), and a supporting angle plate (651) is fixed on the top of each sliding seat (65), and a right-angled angle plate (652) is fixed on the top of each supporting angle plate (651); The center position of the welding platform (60) is vertically rotatably connected to a driving shaft (70), a first driving disk (72) and a second driving disk (76) are fixedly connected to the driving shaft (70), a first driven disk (74) and a second driven disk (78) are rotatably connected to the driving shaft (70), a first annular spring (73) is provided between the first driving disk (72) and the first driven disk (74), and a second annular spring (77) is provided between the second driving disk (76) and the second driven disk (78); A first connecting rod (75) is respectively provided between the first driven disk (74) and the two first sliding rods (63); one end of the first connecting rod (75) is hinged on the first driven disk (74), and the other end is hinged on the corresponding first sliding rod (63); A second connecting rod (79) is respectively provided between the second driven disk (78) and the two second sliding rods (64); one end of the second connecting rod (79) is hinged on the second driven disk (78), and the other end is hinged on the corresponding second sliding rod (64).

2. The automatic spot welding machine for corner guards of battery box of new energy vehicle according to claim 1 is characterized in that: A slot plate (12) is fixedly provided on the machine platform (10) along the Y direction, and a limiting slot (121) is provided on the slot plate (12), and the limiting slot (121) comprises a first horizontal slot (1211), an inclined slot (1212) and a second horizontal slot (1213) which are connected in sequence, and the second horizontal slot (1213) is higher than the first horizontal slot (1211); The bottom of the welding platform (60) is slidably connected to a shaft sleeve (80) along the axis of the driving shaft (70), and the shaft sleeve (80) and the welding platform (60) are rotationally limited. The driving shaft (70) is threadedly connected to the shaft sleeve (80) through a large lead angle thread (71) thereon. The lower end of the shaft sleeve (80) is connected to a push rod (90), and the lower end of the push rod (90) is fixedly connected to a wheel fork (91). A roller (92) is rotatably connected to the wheel fork (91), and the roller (92) is rollingly matched with the limiting groove (121).

3. The automatic spot welding machine for corner guard of battery box of new energy vehicle according to claim 2 is characterized in that: A hollow shaft (61) is fixedly connected to the bottom of the welding platform (60) along the axis of the driving shaft (70); the hollow shaft (61) is rotatably connected to the workbench (50); and a rotating motor (51) is provided on the workbench (50) for driving the hollow shaft (61) to rotate.

4. The automatic spot welding machine for corner guards of battery box of new energy vehicle according to claim 3 is characterized in that: A worm wheel (62) is fixedly connected to the hollow shaft (61), a worm (52) is fixedly connected to the power output shaft of the rotary motor (51), and the worm wheel (62) is meshed with the worm (52).

5. The automatic spot welding machine for corner guard of battery box of new energy vehicle according to claim 3 is characterized in that: The shaft sleeve (80) is rotatably connected to the push rod (90), and the inner wall of the wheel fork (91) is slidably fitted to the groove plate (12).

6. The automatic spot welding machine for corner guard plates of battery box of new energy vehicle according to claim 1 is characterized in that: The machine platform (10) is fixedly connected to a gantry (20), an X-axis motor (21) and a headstock (30) are arranged on the upper part of the gantry (20), and the X-axis motor (21) drives the headstock (30) to slide along the X direction via a screw rod; The headstock (30) is provided with a Z-axis motor (31) and a head (40), and the Z-axis motor (31) drives the head (40) to slide along the Z direction via a screw rod; A first cylinder (41) and a second cylinder (43) are arranged opposite to each other at the bottom of the machine head (40); a first electrode rod (42) is fixedly connected to the telescopic rod of the first cylinder (41); and a second electrode rod (44) is fixedly connected to the telescopic rod of the second cylinder (43).

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