An automatic welding robot for lithium battery module connectors

Abstract

The present invention discloses an automatic welding robot for lithium battery module connectors, comprising a material platform, a welding table and a transfer robot arm, wherein a material storage bin is arranged on the material platform, a welding gun mechanism is arranged on the welding table, and a clamping mechanism is arranged below the welding gun mechanism, wherein the clamping mechanism comprises a clamping platform with a track, a support plate is slidably installed in the clamping platform, a plurality of channels are arranged on the support plate, and a limit plate is installed in each channel, which moves when the limit plate is pressed, thereby forming an avoidance area that fits the connector to be welded on the support plate, on the one hand, the connector to be welded can be stably placed on the support plate, and the connector to be welded placed in different positions can be stabilized, and on the other hand, it cooperates with two clamping plates to work, and when the two clamping plates are close to each other, the clamping plates can contact with the downward-moving limit plate, and when the connector to be welded is released in a non-middle position, the support plate can be driven to move, and the position of the connector to be welded can be automatically corrected without the need for fixed-point release, thereby ensuring accurate welding and improving fault tolerance.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery module connector processing, and in particular to an automatic welding robot for lithium battery module connectors. Background Art

[0002] Vigorously developing pure electric new energy vehicles can effectively alleviate environmental energy shortages, environmental pollution and other problems, and has received attention from countries around the world. Pure electric new energy vehicle projects are booming as an emerging industry. Among them, the important components of the battery module connector are used to connect the single cells in the battery module or between battery modules to achieve current circulation and signal transmission. The manufacturing processes of connectors include: stamping, welding, injection molding, etc. At present, in the welding process, part of the connectors to be welded are placed on the welding table for welding operations one by one manually, which is time-consuming and labor-intensive, and there are certain safety hazards. The other part is to use a robot to grab and transfer the connectors to be welded and place them on the welding table for welding operations. If there is an offset in the process of the robot grabbing or releasing the connectors to be welded, it will affect the accuracy of the welding. Therefore, there is an urgent need for an automatic welding robot for lithium battery module connectors to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic welding robot for lithium battery module connectors, which can effectively solve the problems existing in the above-mentioned prior art.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: an automatic welding robot for lithium battery module connectors, comprising a material platform, a welding table and a transfer robot, wherein at least one material storage bin is provided on the material platform, and the material storage bin is used to stack a plurality of connectors to be welded, a welding gun mechanism is provided on the welding table, and a clamping mechanism is provided below the welding gun mechanism, and the transfer robot is configured to transfer the connectors to be welded in the storage bin to the clamping mechanism, and the clamping mechanism comprises:

[0005] A clamping platform, wherein a track is provided on the clamping platform;

[0006] A support plate is slidably mounted on the track, wherein a plurality of channels are formed on the support plate in a vertical direction, wherein a limit plate is installed in each channel, wherein a top end of each limit plate extends out of the channel, and wherein the limit plate is configured to move downward when under pressure and at least partially extend downward out of the channel, and to form an avoidance zone above the support plate;

[0007] A pair of clamping plates are symmetrically arranged on both sides of the support plate, and the two clamping plates are equipped with a first driving member, and the first driving member controls the two clamping plates to move synchronously toward the center of the track; and

[0008] The clamping plates are configured to synchronously drive the support plate to move along the track when they contact the limit plates extending downwardly from the channel. When both clamping plates contact the limit plates extending downwardly from the channel, the first driving member stops.

[0009] Preferably, the execution end of the transfer robot is provided with a suction cup mechanism, and the suction cup mechanism comprises:

[0010] A pair of crossbars are arranged crosswise, with vacuum suction cups provided at both ends of each crossbar;

[0011] The drive motor has an output shaft equipped with an adjusting screw. The center of one cross bar is sleeved on the adjusting screw through a screw nut. The adjusting screw is configured to drive the corresponding cross bar to move closer to or away from another cross bar through the screw nut when driven by the drive motor.

[0012] Preferably, the transfer robot further comprises a multi-axis robotic arm and a rotating chassis, one end of the multi-axis robotic arm is connected to the rotating chassis, and the other end is connected to the suction cup mechanism through rotation;

[0013] Among them, a rotating disk is installed in the rotating chassis, and a fan-shaped gear is provided on the rotating disk; the first driving member includes a driving screw, and a first linkage mechanism is provided between the fan-shaped gear and the driving screw. The rotating disk controls the first linkage mechanism through the fan-shaped gear to drive the driving screw to rotate within the driving stroke range of the fan-shaped gear. The two splints are both connected to the driving screw through the screw nut, and the rotation of the driving screw drives the two splints to move in the same direction toward the center of the track or reset in the opposite direction.

[0014] Preferably, each of the limiting plates is provided with grooves on both sides, a pressing plate is installed in each of the grooves, and the pressing plate is connected to the inside of the groove via a plurality of pressing springs; and

[0015] The pressing plate is provided with a T-shaped sliding groove in the vertical direction, and the T-shaped sliding grooves of two adjacent limiting plates facing each other are connected by an H-shaped sliding block; the clamping plate is in contact with the pressing plate.

[0016] Preferably, the top end of each of the limiting plates is chamfered on the side facing the center of the track, and a notch is provided on the side of the limiting plate opposite to the chamfer.

[0017] Preferably, a locking member is installed at the bottom of each limiting plate, and the locking member is configured to lock the position of the limiting plate when the limiting plate moves downward, or release the limiting plate to move upward and reset.

[0018] Preferably, the locking member comprises:

[0019] A base, wherein a column is vertically mounted on the base, a right truncated cone block is mounted on the top of the column, an inverted truncated cone block is provided between the right truncated cone block and the base, and the inverted truncated cone block is slidably mounted on the column;

[0020] A return spring is mounted on the column in a vertical direction, and an end of the return spring away from the base is higher than the top of the right circular cone block;

[0021] A slot is provided at the bottom of the limit plate in the vertical direction, and horizontal slots are vertically provided on both sides of the slot. A locking rod is slidingly provided in the slot, and the locking rod is connected to the inside of the slot through a locking spring. The locking spring tends to drive the horizontal rod to move toward the notch of the slot, and a triangular block is installed at the end of the locking rod away from the spring.

[0022] Preferably, the material platform is provided with a bottom plate, the storage bin is provided on the bottom plate, and

[0023] A second driving member is installed in the material platform, and the second driving member is configured to periodically raise the height of the bottom plate as needed so that the uppermost connecting member to be welded is always at a preset height.

[0024] Preferably, a plurality of storage bins are arranged circumferentially on the base plate, and one of the storage bin positions is defined as a loading station. The second driving member is configured to drive the base plate to rotate and periodically raise the height of the base plate as needed, so that the topmost connection to be welded in the storage bin at the loading station is always at a preset height.

[0025] Preferably, the second driving member comprises:

[0026] A lifting screw rod, wherein the lifting screw rod is provided with a fixing nut, and the lifting screw rod is configured to move up and down through the fixing nut when rotating, and an insertion rod is provided at the bottom of the lifting screw rod, and a limit strip is provided on the insertion rod;

[0027] The rotating cylinder has an opening at the top, and a limiting groove is provided in the opening corresponding to the limiting strip, and the insertion rod and the limiting strip are inserted into the opening and the limiting groove correspondingly;

[0028] The second linkage mechanism is configured to drive the rotating cylinder to rotate within a driving stroke range of the sector gear when the second linkage mechanism is engaged with the sector gear.

[0029] Beneficial effects: In the present invention, multiple channels are set on the support plate, and a limit plate is installed in each channel. The limit plate is pressed and moved, so that an avoidance area that fits the connection piece to be welded is formed on the support plate. On the one hand, the connection piece to be welded can be stably placed on the support plate, and the connection piece to be welded placed in different positions can be stabilized. On the other hand, it cooperates with the two clamps to work. When the two clamps are close to each other, the clamps can contact the downward limit plate, and when the connection piece to be welded is released in a non-middle position, it can drive the support plate to move, automatically adjust the position of the above-mentioned connection piece to be welded, and perform position correction without the need for fixed-point release, thereby ensuring accurate welding and improving fault tolerance.

[0030] In the present invention, the clamping plate, the clamping spring, the T-shaped slide groove and the H-shaped slider are used to ensure that the limit plate is pressed up and down and at the same time, the clamping force of the clamping plate can push the contacting clamping plate compression spring to move, and at the same time drive the other clamping plate connected to it to move toward the direction of the connection to be welded, thereby further stabilizing the state of the connection to be welded in the avoidance area.

[0031] In addition, the present invention cooperates with the rotating disk, the first drive of the fan gear and the first linkage mechanism, which can automatically drive the clamping plate to reset and release the connecting parts to be welded when the transfer robot approaches the welding table, and drive the two clamping plates close to each other when the transfer robot moves away from the welding table to perform automatic clamping work, so that it is controlled based on the movement of the transfer robot, and there is no need to set up a separate clamping drive device.

[0032] In the present invention, a second driving member is installed in the material platform. Through the action of the second driving member, the height of the base plate can be periodically raised as needed, so that the topmost connecting part to be welded is always at a preset height, so that the transfer robot can grab and transfer the connecting part to be welded with the simplest action. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0034] In the attached figure:

[0035] Figure 1 This is a structural diagram of the automatic welding robot of the present invention in state 1;

[0036] Figure 2 This is a structural diagram of the automatic welding robot in state 2 of the present invention;

[0037] Figure 3 It is a structural schematic diagram of the suction cup mechanism of the present invention;

[0038] Figure 4 It is a structural schematic diagram of the support plate of the present invention;

[0039] Figure 5 This is a schematic structural diagram of the support plate of the present invention carrying the connecting parts to be welded;

[0040] Figure 6 This is a schematic diagram of the structure of the connection between the drive motor, the adjustment screw and the cross bar of the present invention;

[0041] Figure 7 It is a structural schematic diagram of the first linkage mechanism and the second linkage mechanism of the present invention;

[0042] Figure 8 This is a schematic structural diagram of two limit plates connected to each other in the present invention;

[0043] Figure 9 It is a side view of two limit plates connected to each other in the present invention;

[0044] Figure 10 This invention Figure 9 Schematic diagram of the structure of area A;

[0045] Figure 11 It is a structural schematic diagram of the second linkage mechanism of the present invention.

[0046] Numbers in the figure: 1. Material platform; 11. Storage bin; 12. Bottom plate; 2. Welding table; 21. Welding gun mechanism; 31. Multi-axis robot arm; 32. Rotating chassis; 33. Suction cup mechanism; 331. Crossbar; 332. Vacuum suction cup; 333. Drive motor; 334. Adjusting screw; 34. Rotating disk; 35. Sector gear; 41. Clamping platform; 42. Support plate; 43. Track; 44. Channel; 45. Limit plate; 46. Clamping plate; 47. Drive screw; 48. Groove; 49. Pressing plate; 410. Compression spring; 411. T-shaped slide; 412. H-shaped Slider; 413, chamfer; 414, notch; 51, first gear; 52, change gear box; 53, first pulley group; 6, locking member; 61, base; 62, column; 63, right circular table block; 64, inverted circular table block; 65, return spring; 66, slot; 67, transverse groove; 68, locking rod; 69, locking spring; 610, triangular block; 7, second driving member; 71, lifting screw; 72, fixing nut; 73, rotating cylinder; 74, insert rod; 75, limit strip; 76, opening; 77, limit groove; 781, second pulley group; 782, second gear. DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present invention in conjunction with the accompanying drawings. The terms used in the embodiments of the present invention are only used to explain the specific embodiments of the present invention and are not intended to limit the present invention. The following describes the embodiments of the present application in conjunction with the accompanying drawings.

[0048] Example 1: Figure 1-Figure 2 As shown, a lithium battery module connector automatic welding robot includes a material platform 1, a welding table 2 and a transfer robot. The material platform 1 is provided with at least one storage bin 11, which is used to stack multiple connectors to be welded. The welding table 2 is provided with a welding gun mechanism 21, and a clamping mechanism is provided below the welding gun mechanism 21. The transfer robot is configured to transfer the connectors to be welded in the storage bin to the clamping mechanism. The welding gun mechanism 21 mainly includes a welding gun and an XY translation stage. The XY translation stage controls the movement of the welding gun to achieve welding operations on the connectors to be welded on the clamping mechanism.

[0049] For transfer robots, refer to Figure 1-Figure 2 As shown, it includes a multi-axis robot arm 31 and a rotating chassis 32. One end of the multi-axis robot arm 31 is connected to the rotating chassis 32, and the other end is the execution end, and is connected to the suction cup mechanism 33 by rotation. The suction cup mechanism 33 includes a pair of cross bars 331, and each cross bar 331 is provided with a vacuum suction cup 332 at both ends. The rotating chassis 32 rotates, driving the suction cup mechanism 33 to rotate toward the welding table 2 or the material platform 1, and then the multi-axis robot arm 31 controls the suction cup mechanism 33 to move toward the clamping mechanism or the storage bin, and uses the vacuum suction cup 332 to absorb the connection pieces to be welded in the storage bin or absorb the welded connection pieces for transfer;

[0050] In this embodiment, reference Figure 3 As shown, the suction cup mechanism 33 is connected to the multi-axis robot arm 31 through a rotating shaft, and is equipped with a drive motor 333 and can control the suction cup mechanism 33 to rotate. The suction cup mechanism 33 includes four vacuum suction cups 332, which can be combined into a group by two vacuum suction cups 332. During the welding process, the vacuum suction cups 332 adsorb the connecting parts to be welded. When the welding is completed, it is transferred to the welding table 2 area, and the welded connecting parts are adsorbed by another group of vacuum suction cups 332. Then, the connecting parts are rotated so that the connecting parts to be welded face the clamping mechanism, thereby realizing rapid loading and unloading alternation and improving work efficiency.

[0051] For the clamping mechanism, refer to Figure 1 and Figure 4-Figure 5As shown, it includes a clamping platform 41, a support plate 42 and a pair of clamping plates 46. A track 43 is provided on the clamping platform 41, and the support plate 42 is slidably mounted on the track 43. A plurality of channels 44 are opened on the support plate 42 in the vertical direction, and a limit plate 45 is installed in each channel 44. The top of each limit plate 45 extends out of the channel 44. The limit plate 45 is configured to move downward when under pressure and at least partially extend downward from the channel 44, and form an escape zone above the support plate 42; a pair of clamping plates 46 are symmetrically arranged on both sides of the support plate 42, and the two clamping plates 46 are configured with a first driving member, which controls the two clamping plates 46 to move synchronously toward the center direction of the track 43; when the clamping plates 46 are configured to contact the limit plates 45 extending downward from the channel 44, they synchronously drive the support plate 42 to move along the track 43. When the two clamping plates 46 both contact the limit plates 45 extending downward from the channel 44, the first driving member stops;

[0052] In this embodiment, the channel 44 and the limiting plate 45 are not provided on the entire support plate 42. The channel 44 and the limiting plate 45 can be provided in appropriate areas on the support plate 42 according to the actual conditions of the connection parts to be welded, wherein the channel 44 and the limiting plate 45 are symmetrically arranged around the center of the support plate 42.

[0053] The vacuum suction cup 332 is used to suck the connection piece to be welded and place it on the support plate 42, and downward pressure is applied. The connection piece to be welded squeezes the limit plate 45 below it and moves downward, thereby forming a certain avoidance zone according to the connection piece to be welded itself, stabilizing the state of the connection piece to be welded;

[0054] After the connection pieces to be welded are placed, the first driving member operates to control the clamping plates 46 to move toward the center of the track 43, that is, the two clamping plates 46 move closer to each other. The displacement distance of the two clamping plates 46 can be pre-adjusted according to the size of each batch of connection pieces to be welded.

[0055] With the center area of the track 43 as the preset placement position, when the connecting piece to be welded is accurately placed on the support plate 42 in the center area of the track 43, the two clamping plates 46 move closer to each other until they come into contact with the downward-moving limit plate 45, and clamp the limit plate 45 to stabilize the support plate 42. During this process, the support plate 42 will not be moved.

[0056] When the connecting part to be welded is offset from the center area of the track 43 and placed on the support plate 42, the limit plates 45 on both sides of the center of the support plate 42 move downward asymmetrically. As the clamps 46 move closer to each other, the limit plates 45 on one side are in contact with the clamps 46 in advance and move with the clamps 46, driving the support plate 42 to move along the track 43 for automatic position correction without the need for fixed-point release, thereby ensuring accurate welding and improving fault tolerance.

[0057] Example 2, based on Example 1, with reference to Figure 3 and Figure 6As shown, in this embodiment, the suction cup mechanism 33 also includes a driving motor 333, and the output shaft of the driving motor 333 is installed with an adjusting screw 334. The center of one cross bar 331 is connected to the adjusting screw 334 through a screw nut. The adjusting screw 334 is configured to, when driven by the driving motor 333, drive the corresponding cross bar 331 to move closer to or away from the other cross bar 331 through the screw nut. In this embodiment, the other cross bar 331 and the adjusting screw 334 can be connected through a bearing to ensure that the rotation of the adjusting screw 334 does not affect the cross bar 331; through the above arrangement, the height of the vacuum suction cup 332 on one of the cross bars 331 can be adjusted separately. When the connection piece to be welded is a bent piece and the two sides are not on the same plane, the height of the vacuum suction cup 332 can be pre-adjusted through the above operation, so that the two vacuum suction cups 332 in a group are height-staggered and contact the surface of the connection piece to be welded at the same time, so as to better perform adsorption and grasping.

[0058] Example 3, based on Example 1, Figure 1 and Figure 7 As shown, in this embodiment, a rotating disk 34 is installed in the rotating chassis 32, and a fan gear 35 is provided on the rotating disk 34; the first driving member includes a driving screw 47, and a first linkage mechanism is provided between the fan gear 35 and the driving screw 47. The rotating disk 34 controls the first linkage mechanism through the fan gear 35 to drive the driving screw 47 to rotate within the driving stroke range of the fan gear 35. The two splints 46 are both connected to the driving screw 47 through the screw nut, and the rotation of the driving screw 47 drives the two splints 46 to move in the same direction toward the center of the track 43 or to reset in the opposite direction.

[0059] Among them, reference Figure 7 As shown, in this embodiment, the first linkage mechanism includes:

[0060] The first gear 51 is configured to mesh with the sector gear 35 and is driven to rotate by the sector gear 35 when meshing with the sector gear 35;

[0061] The direction-changing gearbox 52 is at least composed of multiple gears ( Figure 7 The gears are only used to indicate the direction of change, and the specific number of gears can be set according to needs) to change the direction of rotation;

[0062] Among them, the gears of the direction-changing gear box 52 in different directions are respectively linked with the driving screw 47 and the first gear 51 through the first pulley group 53. Figure 1 and 7As shown, when the transport robot moves toward the welding table 2, the sector gear 35 engages with the first gear 51, and as the rotating disk 34 rotates, the first gear 51 is driven to rotate, and the gear in the changing gear box 52 is driven to rotate through the first pulley set 53. After the changing gear box 52 changes direction, the first pulley set 53 outputs rotational power to the drive screw 47, which drives the drive screw 47 to rotate, thereby driving the two clamping plates 46 to move away from the support plate 42. Conversely, when the transport robot moves away from the welding table 2, the sector gear 35 engages with the first gear 51, and as the rotating disk 34 rotates, the first gear 51 is driven to rotate, and the gear in the changing gear box 52 is driven to rotate through the first pulley set 53. After the changing gear box 52 changes direction, the first pulley set 53 outputs rotational power to the drive screw 47, which drives the drive screw 47 to rotate, thereby driving the two clamping plates 46 to move closer to each other in the direction of the support plate 42.

[0063] In this embodiment, reference Figure 8-Figure 9 As shown, each limiting plate 45 has grooves 48 on both sides, and a pressing plate 49 is installed in each groove 48. The pressing plate 49 is connected to the inside of the groove 48 by a plurality of pressing springs 410. A T-shaped sliding groove 411 is formed on the pressing plate 49 in the vertical direction. The T-shaped sliding grooves 411 of two adjacent limiting plates 45 facing each other are connected by an H-shaped slider 412.

[0064] Based on the above structure, when the clamping plates 46 approach each other for clamping movement, the clamping plates 46 will contact the pressing plates 49, and the force transmitted by the extrusion spring drives the support plate 42 to move (when the connection piece to be welded deviates from the center area of the track 43 and is placed on the support plate 42) for correction. Then, a certain displacement of the clamping plates 46 can be left in advance, and the clamping plates 46 move according to the displacement. At this time, the clamping plates 46 on both sides simultaneously apply force to the support plate 42, and the position of the support plate 42 remains unchanged. The contacting pressing plates 49 will squeeze the spring to contract, and at the same time, the pressing plate 49 in the rear limit plate 45 will be pulled by the H-shaped slider 412 to move it toward the side of the connection piece to be welded.

[0065] Among them, in this embodiment, the top of each limit plate 45 is chamfered 413 on the side facing the center of the track 43, and a notch 414 is provided on the side of the limit plate 45 opposite to the chamfer 413. Through the action of the chamfer 413, when the connection piece to be welded is put down, it will automatically slide between the two limit plates 45 and will not be stuck above the limit plate 45. Through the action of the notch 414, displacement space is provided for the clamping plate 49 in the latter limit plate 45, so that it can better contact the connection piece to be welded and stably clamp the connection piece to be welded.

[0066] In Example 3, based on Example 1, a locking member 6 is installed at the bottom of each limiting plate 45. The locking member 6 is configured to lock the limiting plate 45 when the limiting plate 45 moves downward, or release the limiting plate 45 to move upward and reset;

[0067] For the locking member 6, in this embodiment, refer to Figure 10 As shown, the locking member 6 includes:

[0068] The base 61 is fixedly mounted below the limit plate 45, and a column 62 is vertically mounted on the base 61 at the corresponding position of each limit plate 45. A round table block 63 is mounted on the top of the column 62. An inverted round table block 64 is provided between the round table block 63 and the base 61, and the inverted round table block 64 is slidably mounted on the column 62;

[0069] A return spring 65 is mounted on the column 62 in a vertical direction, and an end of the return spring 65 away from the base 61 is higher than the top of the right circular cone block 63;

[0070] A slot 66 is provided at the bottom of the limit plate 45 in the vertical direction, and horizontal slots 67 are vertically provided on both sides of the slot 66. A locking rod 68 is slidingly provided in the slot 66. The locking rod 68 is connected to the inside of the slot 66 through a locking spring 69. The locking spring 69 tends to drive the locking rod 68 to move toward the notch of the slot 66. A triangular block 610 is installed at the end of the locking rod 68 away from the spring.

[0071] Based on the above, when the transfer robot controls the connection to be welded to be placed on the support plate 42, it will squeeze the limit plate 45 downward and squeeze the slot 66 to squeeze the return spring 65 onto the slot 66. At this time, the triangular block 610 is clamped under the right circular table block 63 to realize the locking function. When welding is completed, the transfer robot applies pressure on the connection again to make it continue to move downward. At this time, the oblique edge of the triangular block 610 will contact the inverted circular table block 64 below, be squeezed, and compress the locking spring 69. The transfer robot absorbs the connection upward. At this time, because the triangular block 610 will drive the inverted circular table block 64 below to move along the column 62 until it contacts the right circular table block 63 above, then the triangular block 610 moves along the outer surface of the inverted circular table block 64 to the right circular table block 63, and moves along the surface of the right circular table block 63 until it is completely disengaged, realizing the unlocking effect, the inverted circular table block 64 falls freely and resets, and the return spring 65 pushes the limit plate 45 to reset.

[0072] Example 4, based on Example 1, a base plate 12 is provided on the material platform 1, and the storage bin 11 is provided on the base plate 12. A second driving member is installed in the material platform 1, and the second driving member is configured to periodically raise the height of the base plate 12 as needed so that the uppermost connecting piece to be welded is always at a preset height;

[0073] In this embodiment, reference Figure 1-Figure 2As shown, a plurality of storage bins 11 are circumferentially arranged on the base plate 12, and the position of one of the storage bins 11 is defined as a loading station. The second driving member is configured to drive the base plate 12 to rotate, and at the same time, periodically raise the height of the base plate 12 as needed, so that the topmost connecting part to be welded in the storage bin 11 at the loading station is always at a preset height.

[0074] refer to Figure 11 As shown, the second driving member includes a lifting screw rod 71, a rotating cylinder 73 and a second linkage mechanism; a fixing nut 72 is provided on the lifting screw rod 71, and the lifting screw rod 71 is configured to move up and down through the fixing nut 72 when rotating, and an insertion rod 74 is provided at the bottom of the lifting screw rod 71, and a limit bar 75 is provided on the insertion rod 74; the top of the rotating cylinder 73 has an opening 76, and a limit groove 77 is formed in the opening 76 corresponding to the limit bar 75, and the insertion rod 74 and the limit bar 75 are inserted into the opening 76 and the limit groove 77 respectively; the second linkage mechanism is configured to drive the rotating cylinder 73 to rotate within the driving stroke range of the sector gear 35 when meshing with the sector gear 35;

[0075] Based on the above, taking four storage bins 11 as an example, the first storage bin 11 is a loading station. At this time, the height of the connection piece to be welded in the storage bin 11 is a preset height, and the height of the connection piece to be welded in the next loading station is 3 / 4 of the thickness of the connection piece to be welded, and so on. Figure 11 As shown, in this embodiment, the second linkage mechanism includes a second pulley set 781, one pulley in the second pulley set 781 is connected to the rotating cylinder 73, and the second gear 782 is coaxially provided with the other pulley, and the second gear 782 is connected to the rotating cylinder 73 through a ratchet structure (not shown in the figure). The ratchet structure can control the second gear 782 to drive the pulley to rotate in one direction, with the direction of the transfer robot away from the material platform 1 as the driving direction, that is, when rotating in this direction, the pulley can be driven to rotate through the ratchet structure, and the sector gear 35 is engaged with the second gear 782, and as the rotating disk 34 rotates, the second gear 782 is synchronously driven to rotate. The second pulley group 781 drives the rotating drum 73 to rotate, and the limiting bar 75 and the limiting groove 77 can synchronously drive the lifting screw rod 71 and the base plate 12 to rotate. At the same time, the lifting screw rod 71 automatically moves upward during rotation (the moving distance is controlled at 1 / 4 of the thickness of the connection piece to be welded, and the rotation angle of the base plate 12 is 90°), that is, the next storage bin 11 is switched to the storage bin 11, and the height of the connection piece to be welded in the storage bin 11 is lifted to the preset height. This is repeated to ensure that the connection piece to be welded is at the preset height each time, so that the transfer robot can grab and transfer the connection piece to be welded with the simplest action.

[0076] The above describes the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. After knowing the contents described in the present invention, ordinary technicians in this technical field can make several equivalent changes and substitutions without departing from the principles of the present invention. These equivalent changes and substitutions should also be regarded as falling within the scope of protection of the present invention.

Claims

1. A lithium battery module connector automatic welding robot, comprising a material platform, a welding table, and a transfer robot. The material platform is provided with at least one material storage bin for stacking multiple connectors to be welded. The welding table is provided with a welding gun mechanism, and a clamping mechanism is provided below the welding gun mechanism. The robot is characterized by: The transfer robot is configured to transfer the connection parts to be welded in the storage bin to a clamping mechanism, and the clamping mechanism includes: A clamping platform, wherein a track is provided on the clamping platform; A support plate is slidably mounted on the track, wherein a plurality of channels are formed on the support plate in a vertical direction, wherein a limit plate is installed in each channel, wherein a top end of each limit plate extends out of the channel, and wherein the limit plate is configured to move downward when under pressure and at least partially extend downward out of the channel, and to form an avoidance zone above the support plate; A pair of clamping plates are symmetrically arranged on both sides of the support plate, and the two clamping plates are equipped with a first driving member, and the first driving member controls the two clamping plates to move synchronously toward the center of the track; and The clamping plates are configured to synchronously drive the support plates to move along the track when they contact the limit plates extending downwardly from the channel, and the first driving member stops when both clamping plates contact the limit plates extending downwardly from the channel; When the connecting piece to be welded is placed on the support plate in the center area of the track, the two clamping plates move closer to each other until they come into contact with the downward-moving limit plate, and clamp the limit plate to stabilize the support plate, without causing the support plate to move during this process; When the part to be welded is placed on the pallet at an offset from the center of the track, the limit plates on both sides of the center of the pallet move downward asymmetrically. As the two clamps move closer to each other, the limit plate on one side contacts the clamp in advance and moves with the clamp, driving the pallet to move along the track for automatic position correction. The transfer robot also includes a multi-axis mechanical arm and a rotating chassis; a rotating disk is installed in the rotating chassis, and a sector gear is provided on the rotating disk; The material platform is provided with a base plate, and the material storage bin is provided on the base plate; a second driving member is installed in the material platform; a plurality of material storage bins are provided along the circumference of the base plate, and one of the material storage bins is defined as a loading station, and the second driving member is configured to drive the base plate to rotate and periodically raise the height of the base plate as needed, so that the uppermost connecting piece to be welded in the material storage bin at the loading station is always at a preset height; The second driving member includes: A lifting screw rod, wherein the lifting screw rod is provided with a fixing nut, and the lifting screw rod is configured to move up and down through the fixing nut when rotating, and an insertion rod is provided at the bottom of the lifting screw rod, and a limit strip is provided on the insertion rod; The rotating cylinder has an opening at the top, and a limiting groove is provided in the opening corresponding to the limiting strip, and the insertion rod and the limiting strip are inserted into the opening and the limiting groove correspondingly; a second linkage mechanism, wherein the second linkage mechanism is configured to drive the rotating cylinder to rotate within a driving stroke range of the sector gear when engaged with the sector gear; The second linkage mechanism includes a second pulley group, in which one pulley in the second pulley group is connected to the rotating drum, and the other pulley is coaxially arranged with a second gear, and the second gear and the rotating drum are connected by a ratchet structure, and the fan gear is meshed with the second gear. As the rotating disk rotates, the second gear is synchronously driven to rotate, thereby driving the rotating drum to rotate through the second pulley group, and under the action of the limit bar and the limit groove, the lifting screw rod and the base plate can be synchronously driven to rotate synchronously. At the same time, the lifting screw rod automatically moves upward during rotation, switching the next storage bin to the storage bin, and at the same time, the height of the connection to be welded in the storage bin is lifted to a preset height.

2. The automatic welding robot for lithium battery module connectors according to claim 1, characterized in that: The execution end of the transfer robot is provided with a suction cup mechanism, and the suction cup mechanism includes: A pair of crossbars are arranged crosswise, with vacuum suction cups provided at both ends of each crossbar; The drive motor has an output shaft equipped with an adjusting screw. The center of one cross bar is sleeved on the adjusting screw through a screw nut. The adjusting screw is configured to drive the corresponding cross bar to move closer to or away from another cross bar through the screw nut when driven by the drive motor.

3. The automatic welding robot for lithium battery module connectors according to claim 2, characterized in that: One end of the multi-axis robotic arm is connected to the rotating chassis, and the other end is connected to the suction cup mechanism through rotation; Among them, the first driving member includes a driving screw, and a first linkage mechanism is arranged between the sector gear and the driving screw. The rotating disk controls the first linkage mechanism through the sector gear to drive the driving screw to rotate within the driving stroke range of the sector gear. The two clamps are both connected to the driving screw through the screw nut, and the rotation of the driving screw drives the two clamps to move in the same direction toward the center of the track or reset in the opposite direction.

4. The automatic welding robot for lithium battery module connectors according to claim 1 or 3, characterized in that: Each of the limiting plates is provided with grooves on both sides, each of the grooves is provided with a pressing plate, and the pressing plate is connected to the inside of the groove via a plurality of pressing springs; and The pressing plate is provided with a T-shaped sliding groove in the vertical direction, and the T-shaped sliding grooves of two adjacent limiting plates facing each other are connected by an H-shaped sliding block; the clamping plate is in contact with the pressing plate.

5. The automatic welding robot for lithium battery module connectors according to claim 1, characterized in that: The top end of each of the limiting plates is chamfered on one side facing the center of the track, and a notch is provided on the side of the limiting plate opposite to the chamfer.

6. The automatic welding robot for lithium battery module connectors according to claim 1, characterized in that: A locking member is installed at the bottom of each of the limit plates, and the locking member is configured to lock the position of the limit plate when the limit plate moves downward, or release the limit plate to move upward and reset.

7. The automatic welding robot for lithium battery module connectors according to claim 6, characterized in that: The locking member comprises: A base, wherein a column is vertically mounted on the base, a right truncated cone block is mounted on the top of the column, an inverted truncated cone block is provided between the right truncated cone block and the base, and the inverted truncated cone block is slidably mounted on the column; A return spring is mounted on the column in a vertical direction, and an end of the return spring away from the base is higher than the top of the right circular cone block; A slot is provided at the bottom of the limit plate in the vertical direction, and horizontal slots are vertically provided on both sides of the slot. A locking rod is slidingly provided in the slot, and the locking rod is connected to the inside of the slot through a locking spring. The locking spring tends to drive the locking rod to move toward the notch of the slot, and a triangular block is installed at the end of the locking rod away from the spring.

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