A new energy battery pack shell assembly pull rivet equipment

Abstract

The application relates to a battery pack shell riveting device field, and particularly discloses a new energy battery pack shell assembly riveting device, which comprises a riveting table, the upper end of the riveting table is provided with a frame body, the upper end of the frame body is slidably provided with a sliding frame, the upper end of the sliding frame is slidably provided with a sliding block, the upper end of the frame body is provided with a driving assembly, the lower end of the sliding block is provided with a riveting mechanism, and the sidewall of the frame body is provided with a screening mechanism; the battery pack shell is placed on the riveting table, then the driving assembly on the frame body drives the sliding frame, the sliding block and the riveting mechanism to move to riveting point positions, the screening mechanism screens the rivet nuts and the rivet rods and feeds the rivet nuts and the rivet rods to the riveting mechanism, and the riveting assembly completes riveting assembly, so that one-time riveting of the rivet nuts and the rivet rods on the battery pack shell and riveting of complex structures such as deep cavities and flange dead angles of the shell are realized, secondary clamping and repeated positioning of the shell are avoided, and the planeness of the sealing surface of the shell is guaranteed.

Description

Technical Field

[0001] This application relates to the field of riveting equipment for battery pack housings, and in particular to a riveting equipment for assembling new energy battery pack housings. Background Technology

[0002] The battery pack casing is a key load-bearing and protective component of the power battery system in new energy vehicles. It is usually made of lightweight materials such as aluminum alloy through stamping, welding or extrusion. Riveting equipment is a special assembly equipment that uses axial tensile force to cause plastic deformation of the riveted parts, thereby forming a high-strength threaded connection on the thin-walled casing. Since the aluminum alloy casing cannot be directly tapped to withstand high loads, steel threaded fasteners must be implanted on it through the riveting process to ensure the reliable assembly of subsequent components such as battery modules, liquid cooling plates, high-voltage copper busbars and sealing covers. The riveting process is mainly divided into two types: riveting nuts and riveting studs. The former forms an internal threaded hole on the casing, and the latter forms an external threaded stud. The mandrel of the riveting stud is usually made of high-strength carbon steel with good magnetic conductivity, while the body of the riveting nut is made of non-magnetic aluminum alloy to ensure connection strength, wear resistance and electrochemical corrosion resistance.

[0003] In existing technologies, battery pack casing riveting equipment typically consists of three parts: a riveting gun, a feeding system, and a motion actuator. The riveting gun, as the core actuator, has a gun head at its front end, which contains a pull rod mechanism for gripping the mandrel. The gun body integrates a hydraulically or electrically driven piston cylinder to provide axial tension for the pull rod. The feeding system generally uses a vibratory feeder in conjunction with a compressed air pipeline. The vibratory feeder arranges the scattered fasteners neatly and feeds them one by one into the feeding pipe through a distributor. Under the action of compressed air, the fasteners are blown to the receiving end of the riveting gun head. The motion actuator is mostly an industrial robot or a gantry truss, with the riveting gun installed at its end. It moves between each riveting point according to a preset program and completes the riveting operation. The various structures are connected by mechanical flanges, air pipe joints, and electrical control cables to achieve automated linkage of feeding, positioning, and riveting.

[0004] Regarding the aforementioned technologies, since the battery pack casing requires the simultaneous use of rivet nuts and rivet bolts, and existing rivet gun heads can only be adapted to a single process object, in actual operation, all rivet nuts inside the casing must be riveted first, and then the gun head or the entire rivet gun must be changed to perform the rivet bolt operation. This batch construction method not only leads to repeated equipment movement and repositioning, causing cycle time loss and secondary clamping errors, but also affects the flatness of the casing sealing surface due to the batch-by-batch stress superposition. Secondly, although some improvement solutions integrate a switching mechanism at the gun head to accommodate... The system can operate in two modes, but the switching mechanism increases the size and weight of the nozzle tip, making it difficult to penetrate deep into complex structures such as the deep cavity of the battery module fixing point, the corner of the wall inside the flange on the edge of the housing, the low gap of the densely installed liquid cooling plate area, the narrow gap between the high-voltage connector and the wire harness fixing seat, and the double-layer reinforced structure at the connection point between the lifting lug and the vehicle body. The space accessibility is poor. Finally, the two independent supply pipelines supply material to the nozzle tip respectively, and the pipeline follow-up layout is complicated, which increases the risk of pipeline entanglement at the end of the robot and the difficulty of maintenance. Therefore, improvements are made to address these issues. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a riveting device for assembling the casing of a new energy battery pack.

[0006] The riveting equipment for assembling a new energy battery pack casing provided in this application adopts the following technical solution: A riveting device for assembling a new energy battery pack casing includes a riveting table and a clamping device. The upper end of the riveting table has a placement slot for placing the battery pack casing. The clamping device is disposed on the side wall of the placement slot. The upper end of the riveting table is provided with a frame. A sliding frame is slidably disposed on the upper end of the frame along the length direction of the frame. A sliding block is slidably disposed on the upper end of the sliding frame along the width direction of the frame. A driving assembly for driving the sliding frame and the sliding block is provided on the upper end of the frame. A riveting mechanism for riveting rivet nuts and rivet screws is provided on the lower end of the sliding block. A screening mechanism for screening the rivet nuts and rivet screws and feeding them to the riveting mechanism is provided on the side wall of the frame.

[0007] By adopting the above technical solution, the battery pack casing is placed in the placement slot opened at the top of the riveting table, and the casing is clamped and fixed by the clamping device. Then, the sliding frame, sliding block and riveting mechanism are moved to the riveting point position by the drive component on the frame. The screening mechanism screens the riveting nuts and riveting screws and feeds the screened riveting nuts and riveting screws to the riveting mechanism, which completes the riveting assembly of the riveting nuts and riveting screws. This realizes the one-time riveting of the riveting nuts and riveting screws on the battery pack casing, as well as the riveting of complex structures such as deep cavities and flange dead corners of the casing. It avoids secondary clamping and repeated positioning of the casing, which helps to ensure the flatness of the casing sealing surface. The screening mechanism and the riveting mechanism are configured close to each other, the material supply path is short and the overall structure is compact.

[0008] Optionally, the drive assembly includes a first lead screw motor and a second lead screw motor. The first lead screw motor is disposed at the upper end of the frame, and the lead screw is threadedly connected to one end of the sliding frame. The second lead screw motor is disposed at the upper end of the sliding frame, and the lead screw is threadedly connected to the upper end of the sliding block.

[0009] By adopting the above technical solution, when it is necessary to rivet different positions of the battery pack casing, the first lead screw motor is started. The lead screw of the first lead screw motor rotates, driving the sliding frame, the sliding block and the second lead screw motor to move along the length direction of the frame. The second lead screw motor is started, and the lead screw of the second lead screw motor rotates, driving the sliding block to move along the width direction of the frame, so that the riveting mechanism can move accurately to each rivet point position and ensure the riveting positioning accuracy.

[0010] Optionally, the riveting mechanism includes a robotic arm, a rivet gun, a sleeve, a telescopic cylinder, grippers, a first cylinder, and a nut riveting assembly. The robotic arm is located at the lower end of the sliding block, the rivet gun is located at the output end of the robotic arm, the sleeve is slidably located inside the housing of the rivet gun and is fixedly connected to the output end of the rivet gun, the first cylinder is located on the inner bottom wall of the sleeve near the end of the rivet gun, the telescopic cylinder is slidably located inside the sleeve and is fixedly connected to the telescopic end of the first cylinder, the grippers are located at the end of the telescopic cylinder away from the rivet gun, and four sets are symmetrically arranged. The outer sides of the four sets of grippers are provided with wedge-shaped surfaces. When the telescopic cylinder retracts, the wedge-shaped surfaces of the four sets of grippers abut against the end of the sleeve, causing the four sets of grippers to come together and clamp. The nut riveting assembly is located inside the telescopic cylinder and is used to rivet the rivet nut.

[0011] By adopting the above technical solution, when it is necessary to rivet the rivet screw, the robotic arm is activated. The output end of the robotic arm moves to move the rivet gun to the screening mechanism for material collection. At this time, the first cylinder is activated. The telescopic end of the first cylinder moves to retract the telescopic cylinder and the four sets of grippers, and the wedge-shaped surfaces of the four sets of grippers abut against the end of the sleeve, so that the four sets of grippers come together and clamp the mandrel of the rivet screw. Then, the robotic arm moves the rivet gun to the rivet position and activates the rivet gun. The output end of the rivet gun moves to move the sleeve, telescopic cylinder, four sets of grippers and the clamped rivet screw mandrel backward synchronously. The front end of the rivet gun presses against the flange surface of the rivet screw, so that the smooth part of the rivet screw is axially compressed and radially expanded to form a locking head, until the rivet screw mandrel is broken at the preset fracture groove, thereby realizing the rivet of the rivet screw.

[0012] Optionally, the nut riveting assembly includes a servo motor, a mounting plate, a second cylinder, and a pull rod. Two sets of mounting grooves are symmetrically formed on the inner circumferential wall of the telescopic cylinder for mounting the mounting plate onto the inner circumferential wall of the sleeve. Both ends of the mounting plate pass through the two sets of mounting grooves and are disposed on the inner circumferential wall of the sleeve. The servo motor is disposed at the end of the mounting plate near the rivet gun, and its output end passes through the mounting plate. The second cylinder is disposed at the output end of the servo motor. The pull rod is disposed at the telescopic end of the second cylinder, and its end away from the servo motor has an external thread for engaging with the internal thread of the rivet nut spindle.

[0013] By adopting the above technical solution, when it is necessary to rivet the rivet nut, the second cylinder is activated. The telescopic end of the second cylinder moves, driving the pull rod to the rivet nut. Then, the servo motor is activated, and with the cooperation of the second cylinder, the external thread of the pull rod is screwed into the internal thread of the rivet nut mandrel. Subsequently, the robotic arm moves to the rivet position and activates the rivet gun. The output end of the rivet gun moves, driving the sleeve, mounting plate, servo motor, second cylinder, pull rod, and rivet nut mandrel to pull backward synchronously. The front end of the rivet gun presses against the flange face of the rivet nut, causing the tubular part of the rivet nut to... The rivet body is axially compressed and radially expanded to form a locking head until the rivet nut mandrel is broken at the preset fracture groove, thereby realizing the riveting of the rivet nut. This allows the same rivet gun to rivet both the rivet screw and the rivet nut separately, without the need to change the gun head or quickly replace the entire rivet gun. This eliminates the problems of repeated equipment movement and repositioning caused by batch construction, reduces the impact of stress accumulation on the flatness of the shell sealing surface, and the simple front end of the gun head makes it easy to perform riveting operations in complex structures such as deep cavities of the shell and dead corners of flanges.

[0014] Optionally, the screening mechanism includes a housing, a screening cylinder, an auger conveyor, a permanent magnet, a conveying assembly, and a feeding assembly. The housing is disposed on the outer wall of the frame. The screening cylinder is vertically disposed inside the housing and located at the end away from the frame. The auger conveyor is vertically disposed on the inner bottom wall of the housing and located inside the screening cylinder. A feed inlet is provided in the middle of the screening cylinder on the side away from the frame, and an upper discharge outlet is provided at the upper end of the screening cylinder on the side closer to the frame. The screening cylinder has a lower discharge port at its lower end near the frame. Multiple sets of permanent magnets are provided, spaced apart on the lower surface of the auger. The lower part of the auger and the end near the upper discharge port are not provided with permanent magnets. The conveying assembly is located inside the housing and is used to keep the rivet screw and rivet nut in a vertical position and to convey them. The feeding assembly is located at the end of the housing away from the screening cylinder and is used to feed the rivet screw and rivet nut to the rivet gun respectively.

[0015] By adopting the above technical solution, the rivet screw and rivet nut are added into the screening cylinder through the feed inlet. Then, the auger conveyor is started. When the auger rotates, the magnetic rivet screw is attracted to the upper surface of the blades by the permanent magnet and rises with the auger spiral, and is discharged at the upper discharge port. The non-magnetic rivet nut is not attracted and settles under gravity, and is discharged at the lower discharge port. No permanent magnet is set at the end of the auger near the upper discharge port, so that the rivet screw can be smoothly separated from the blades in the discharge area. The rivet screw that is not immediately attracted after entering the feed inlet continues to slide down under gravity. The multiple sets of permanent magnets added in the middle and lower part of the auger can intercept and attract the sliding rivet screw midway, preventing the rivet screw from sliding down to the lower end of the screening cylinder and mixing with the rivet nut. This ensures the purity of the magnetic screening of the rivet screw and rivet nut and realizes the integrated automatic screening of the rivet nut and rivet screw in the same screening cylinder.

[0016] Optionally, the conveying assembly includes an upper arc-shaped cylinder, a lower arc-shaped cylinder, an upper conveying roller, and a lower conveying roller. The upper arc-shaped cylinder and the lower arc-shaped cylinder are both disposed on the inner sidewall of the housing. The upper arc-shaped cylinder is disposed at the lower end of the upper discharge port, and the lower arc-shaped cylinder is disposed at the lower end of the lower discharge port. The bottom wall of the upper arc-shaped cylinder has a through groove for allowing the rivet nut to pass through and keeping the rivet screw in a vertical position. The bottom wall of the lower arc-shaped cylinder has a groove for keeping the rivet nut in a vertical position. Multiple sets of upper conveying rollers are provided, and the multiple sets of upper conveying rollers are spaced apart and symmetrically disposed on both sides of the lower end of the through groove. The ends of the multiple sets of upper conveying rollers on both sides that are close to each other are inclined downwards. Multiple sets of lower conveying rollers are provided, and the multiple sets of lower conveying rollers are spaced apart and symmetrically disposed on both sides of the lower end of the groove.

[0017] By adopting the above technical solution, the rivet screw and rivet nut fall into the upper and lower arc-shaped cylinders respectively. The passage groove opened on the bottom wall of the upper arc-shaped cylinder allows individual rivet nuts mixed in with the rivet screw to pass through and fall into the lower arc-shaped cylinder. At the same time, the rivet screw is kept vertically suspended in the passage groove by the cooperation of the arc-shaped surface. The groove opened on the bottom wall of the lower arc-shaped cylinder keeps the rivet nut vertically suspended in the groove by the cooperation of the arc-shaped surface. When the multiple sets of upper conveyor rollers rotate, they frictionally convey the vertically suspended rivet screw, while the multiple sets of lower conveyor rollers frictionally convey the vertically suspended rivet screw. The nuts are conveyed by friction, which automatically adjusts the rivet screw and rivet nut from an arbitrary falling posture to a uniform vertical hanging posture, providing a consistent part orientation for subsequent material feeding. The rivet screw and rivet nut are conveyed by rollers, with the ends of the upper conveyor rollers inclined downwards. This allows the rivet nuts that fall between the two sets of upper conveyor rollers to automatically slide downwards along the inclined surface of the rollers and fall to the bottom, preventing the rivet nuts from getting stuck between the two sets of upper conveyor rollers and being unable to be discharged. This ensures that the conveying of the rivet screw by the upper conveyor rollers is not interfered with by mixed rivet nuts.

[0018] Optionally, the feeding assembly includes a first drive motor, a first baffle blade, a second drive motor, a second baffle blade, a screw conveyor pipe, a nut conveyor pipe, a three-way valve, a receiving plate, and a receiving tray. The first drive motor is mounted on the side wall of the housing near the frame, and its output end penetrates the housing. The first baffle blade is mounted on the output end of the first drive motor and located at the end of the through groove away from the upper discharge port. The second drive motor is mounted on the side wall of the housing near the frame, and its output end penetrates the housing. The second baffle blade is mounted on the output end of the first drive motor and located at the end of the through groove away from the upper discharge port. The output end of the second drive motor is located at the end of the groove away from the lower discharge port. The screw conveying pipe is located at the lower end of the first baffle blade and is fixedly connected to the housing. The nut conveying pipe is located at the lower end of the second baffle blade and its lower end is connected to the screw conveying pipe. The receiving plate is located at the lower end of the sliding block. The receiving disc is rotatably located at the upper end of the receiving plate. The three-way valve is located at the connection between the screw conveying pipe and the nut conveying pipe. The other two ends of the three-way valve are respectively connected to the receiving plate through hoses and to an external air supply system.

[0019] By adopting the above technical solution, when riveting of the rivet screw is required, the first drive motor is started. The output end of the first drive motor rotates, driving the first baffle blade to rotate. Each rotation of the first baffle blade releases a single rivet screw into the screw conveying pipe. When riveting of the rivet nut is required, the second drive motor is started. The output end of the second drive motor rotates, driving the second baffle blade to rotate. Each rotation of the second baffle blade releases a single rivet nut into the nut conveying pipe. Then, the air path is switched through a three-way valve to connect the external air supply system with the hose, thereby blowing the rivet screw or rivet nut through the hose to the receiving tray at the receiving plate. This simplifies the pipeline layout and reduces the risk of pipeline entanglement and maintenance difficulty caused by the dynamic arrangement of two sets of independent supply pipelines.

[0020] Optionally, both the upper and lower arc-shaped cylinders have rotatable actuation plates on their inner walls for moving rivet screws and rivet nuts that are not in a vertical position. Both the upper and lower arc-shaped cylinders have third drive motors on their outer walls, and their output ends are fixedly connected to the actuation plates.

[0021] By adopting the above technical solution, the third drive motor is started. The output end of the third drive motor rotates, causing the actuating plate to rotate inside the upper and lower arc-shaped cylinders. This actuates the rivet screws and rivet nuts that are not in a vertical position and have not fallen into the through slot or groove. Under the action of the arc surfaces of the upper and lower arc-shaped cylinders, the rivet screws and nuts fall into the through slot or groove, reducing the interruption or jamming of material supply caused by the incorrect posture of the parts, and improving the reliability of the vertical alignment of the conveying assembly and the continuity of material supply.

[0022] Optionally, the upper end of the receiving plate is provided with a rotary cylinder, and the output end is fixedly connected to the receiving tray. The upper end of the receiving tray is provided with a clamping groove for clamping the rivet screw and for easy holding of the rivet screw. The bottom wall of the clamping groove is provided with a clamping groove for clamping the rivet nut.

[0023] By adopting the above technical solution, the rotary cylinder is activated, and the output end of the rotary cylinder rotates, causing the receiving plate to rotate directly below the outlet of the feeding pipeline. This allows the rivet screw or rivet nut to fall precisely into the clamping groove and the snap-fit ​​groove, and to remain vertical under the constraint of the groove. This avoids the rivet gun being unable to align with the end of the mandrel or the clamping position when picking up the part due to skewness, resulting in pickup failure or riveting misalignment. Subsequently, the rotary cylinder rotates the receiving plate to a suitable picking position, thereby reducing the spatial interference of the feeding pipeline on the rivet gun's picking action. At the same time, the clamping groove and the snap-fit ​​groove provide the rivet gun with a fixed vertical part posture, and facilitate the rivet gun's jaws or pull rod to quickly and accurately complete the pickup.

[0024] Optionally, a tension sensor is provided between the output end of the rivet gun and the sleeve, and a laser displacement sensor is provided on the output end of the rivet gun.

[0025] By adopting the above technical solution, during the riveting process, the tension sensor detects the axial tension applied to the sleeve by the output end of the rivet gun in real time, and the laser displacement sensor detects the axial displacement of the sleeve in real time. By collecting force and displacement data during the riveting process through the tension sensor and the laser displacement sensor, a force-displacement curve can be generated in real time and the riveting quality can be determined. This enables unified quality monitoring under both the rivet nut and rivet screw process modes, provides data support for process parameter optimization, and helps ensure the consistency and reliability of the riveting connection strength.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When riveting the rivet screw is required, the robotic arm is activated. The output end of the robotic arm moves to move the rivet gun to the screening mechanism for material collection. At this time, the first cylinder is activated. The telescopic end of the first cylinder moves to retract the telescopic cylinder and the four sets of grippers, and the wedge-shaped surfaces of the four sets of grippers abut against the end of the sleeve, so that the four sets of grippers come together and clamp the mandrel of the rivet screw. Then, the robotic arm moves the rivet gun to the rivet position and activates the rivet gun. The output end of the rivet gun moves to move the sleeve, telescopic cylinder, four sets of grippers and the clamped rivet screw mandrel backward synchronously. The front end of the rivet gun presses against the flange surface of the rivet screw, so that the smooth part of the rivet screw is axially compressed and radially expanded to form a locking head, until the rivet screw mandrel is broken at the preset fracture groove, thereby realizing the riveting of the rivet screw.

[0027] When rivet nuts need to be riveted, the second cylinder is activated. The telescopic end of the second cylinder moves, causing the pull rod to move to the rivet nut. Then, the servo motor is activated, and with the cooperation of the second cylinder, the external thread of the pull rod is screwed into the internal thread of the rivet nut mandrel. Subsequently, the robotic arm moves to the rivet position and activates the rivet gun. The output end of the rivet gun moves, causing the sleeve, mounting plate, servo motor, second cylinder, pull rod, and rivet nut mandrel to pull backward synchronously. Meanwhile, the front end of the rivet gun presses against the flange face of the rivet nut, axially compressing the tubular rivet body of the rivet nut. The bolt expands radially outward to form a locking head until the rivet nut mandrel is broken at the preset fracture groove, thereby achieving the riveting of the rivet nut. This allows the same rivet gun to rivet both the rivet screw and the rivet nut separately, without the need to change the gun head or quickly replace the entire rivet gun. This eliminates the problems of repeated equipment movement and repositioning caused by batch construction, reduces the impact on the flatness of the shell sealing surface due to the batch superposition of stress, and the gun head front is simple, making it easy to perform riveting operations in complex structures such as deep cavities of the shell and dead corners of the flange. 2. Add the rivet screw and rivet nut into the screening cylinder through the feed inlet, and then start the auger conveyor. When the auger rotates, the magnetic rivet screw is attracted to the upper surface of the blade by the permanent magnet and rises with the auger spiral and is discharged at the upper discharge port. The non-magnetic rivet nut is not attracted and settles under gravity and is discharged at the lower discharge port. No permanent magnet is set at the end of the auger near the upper discharge port, so that the rivet screw can be smoothly separated from the blade in the discharge area. The rivet screw that is not immediately attracted after entering the feed inlet continues to slide down under gravity. The multiple sets of permanent magnets added in the middle and lower part of the auger can intercept and attract the sliding rivet screw in the middle, preventing the rivet screw from sliding down to the lower end of the screening cylinder and mixing with the rivet nut. This ensures the magnetic screening purity of the rivet screw and rivet nut and realizes the integrated automatic screening of the rivet nut and rivet screw in the same screening cylinder. 3. The rivet screw and rivet nut fall into the upper and lower arc-shaped cylinders respectively. A groove on the bottom wall of the upper arc-shaped cylinder allows any rivet nuts mixed in with the rivet screw to pass through and fall into the lower arc-shaped cylinder. Simultaneously, the arc-shaped surface helps keep the rivet screw vertically suspended within the groove. A groove on the bottom wall of the lower arc-shaped cylinder, also with the arc-shaped surface, helps keep the rivet nut vertically suspended within the groove. Multiple sets of upper conveyor rollers rotate, frictionally conveying the vertically suspended rivet screw, while multiple sets of lower conveyor rollers rub against the vertically suspended rivet nut. The conveying mechanism automatically adjusts the rivet screw and rivet nut from any falling posture to a uniform vertical hanging posture, providing a consistent part orientation for subsequent material feeding. The rivet screw and rivet nut are conveyed by rollers, with the ends of the upper conveying rollers inclined downwards. This allows the rivet nuts that fall between the two sets of upper conveying rollers to automatically slide downwards along the inclined surface of the rollers and fall to the bottom, preventing the rivet nuts from getting stuck between the two sets of upper conveying rollers and being unable to be discharged. This ensures that the conveying of the rivet screw by the upper conveying rollers is not interfered with by the mixed rivet nuts. 4. When riveting the rivet screw is required, the first drive motor is started. The output end of the first drive motor rotates, driving the first baffle blade to rotate. Each rotation of the first baffle blade releases a single rivet screw into the screw conveying pipe. When riveting the rivet nut is required, the second drive motor is started. The output end of the second drive motor rotates, driving the second baffle blade to rotate. Each rotation of the second baffle blade releases a single rivet nut into the nut conveying pipe. Then, the air path is switched through the three-way valve to connect the external air supply system with the hose, thereby blowing the rivet screw or rivet nut through the hose to the receiving plate at the receiving plate. This simplifies the pipeline layout and reduces the risk of pipeline entanglement and maintenance difficulty caused by the dynamic arrangement of two sets of independent supply pipelines. 5. During the riveting process, the tension sensor detects the axial tension applied to the sleeve by the output end of the rivet gun in real time, and the laser displacement sensor detects the axial displacement of the sleeve in real time. By collecting force and displacement data during the riveting process through the tension sensor and the laser displacement sensor, a force-displacement curve can be generated in real time and the riveting quality can be determined. This enables unified quality monitoring under both the rivet nut and rivet screw process modes, providing data support for process parameter optimization and helping to ensure the consistency and reliability of the riveting connection strength. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is another schematic diagram of the overall structure; Figure 3 This is a cross-sectional structural diagram of the riveting mechanism; Figure 4 This is a cross-sectional schematic diagram of the screening mechanism; Figure 5 yes Figure 4 Partial structural diagram; Figure 6 yes Figure 1 A magnified structural diagram of part A in the middle.

[0030] Reference numerals: 1. Riveting table; 11. Placement slot; 12. Frame; 13. Sliding frame; 14. Sliding block; 2. Drive assembly; 21. First lead screw motor; 22. Second lead screw motor; 3. Riveting mechanism; 31. Robotic arm; 32. Riveting gun; 321. Tension sensor; 322. Laser displacement sensor; 33. Sleeve; 34. Telescopic cylinder; 35. Gripper; 36. First cylinder; 4. Nut riveting assembly; 41. Servo motor; 42. Mounting plate; 43. Second cylinder; 44. Pull rod; 45. Mounting slot; 5. Screening mechanism; 51. Box; 52. Screening cylinder; 53. Screw conveyor; 54. Inlet; 55. Upper outlet; 56. Lower outlet; 6. Conveying assembly; 61. Upper arc cylinder; 62. Lower arc cylinder; 63. Upper conveying roller; 64. Lower conveying roller; 65. Through groove; 66. Groove; 7. Feeding assembly; 71. First drive motor; 72. First baffle blade; 73. Second drive motor; 74. Second baffle blade; 75. Screw conveying pipe; 76. Nut conveying pipe; 77. Three-way valve; 78. Receiving plate; 79. Receiving tray; 8. Actuating plate; 81. Third drive motor; 9. Rotary cylinder; 91. Clamping groove; 92. Snap-fit ​​groove. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] This application discloses a riveting device for assembling a new energy battery pack casing, referring to... Figure 1 A riveting device for assembling the casing of a new energy battery pack includes a riveting table 1 and a clamping device. The upper end of the riveting table 1 is provided with a placement groove 11. The clamping device is bolted to the side wall of the placement groove 11. A frame 12 is fixedly installed on the upper end of the riveting table 1. A sliding frame 13 is slidably installed on the upper end of the frame 12 along the length direction of the frame 12. A sliding block 14 is slidably installed on the upper end of the sliding frame 13 along the width direction of the frame 12. A drive assembly 2 is installed on the upper end of the frame 12. A riveting mechanism 3 is installed on the lower end of the sliding block 14. A screening mechanism 5 is installed on the side wall of the frame 12.

[0033] The battery pack casing is placed in the placement slot 11 at the upper end of the riveting table 1 and clamped and fixed by the clamping device. Then, the sliding frame 13, sliding block 14 and riveting mechanism 3 are moved to the riveting points by the drive component 2 on the frame 12. The screening mechanism 5 screens the riveting nuts and riveting screws and feeds the screened riveting nuts and riveting screws to the riveting mechanism 3. The riveting mechanism 3 completes the riveting assembly of the riveting nuts and riveting screws, thereby realizing the one-time riveting of the riveting nuts and riveting screws on the battery pack casing, as well as the riveting of complex structures such as deep cavities and flange dead corners of the casing. This avoids secondary clamping and repeated positioning of the casing and helps to ensure the flatness of the casing sealing surface. The screening mechanism 5 and the riveting mechanism 3 are configured close to each other, the material supply path is short and the overall structure is compact.

[0034] Reference Figure 1 and Figure 2 In this embodiment, the drive component 2 includes a first lead screw motor 21 and a second lead screw motor 22. The first lead screw motor 21 is bolted to the upper end of the frame 12, and the lead screw is threaded to one end of the sliding frame 13. The second lead screw motor 22 is bolted to the upper end of the sliding frame 13, and the lead screw is threaded to the upper end of the sliding block 14.

[0035] Start the first lead screw motor 21. The lead screw of the first lead screw motor 21 rotates, causing the sliding frame 13, the sliding block 14 and the second lead screw motor 22 to move along the length of the frame 12. Start the second lead screw motor 22. The lead screw of the second lead screw motor 22 rotates, causing the sliding block 14 to move along the width of the frame 12, so that the riveting mechanism 3 can move accurately to each riveting point position and ensure the riveting positioning accuracy.

[0036] Reference Figure 1 , Figure 2 and Figure 3 To simultaneously rivet the rivet screw and rivet nut, the rivet mechanism 3 in this embodiment includes a robotic arm 31, a rivet gun 32, a sleeve 33, a telescopic cylinder 34, a gripper 35, a first cylinder 36, and a nut rivet assembly 4. The robotic arm 31 is fixedly mounted on the lower end of the sliding block 14, the rivet gun 32 is fixedly mounted on the output end of the robotic arm 31, the sleeve 33 is slidably mounted inside the housing of the rivet gun 32 and fixedly connected to the output end of the rivet gun 32, and the first cylinder 36 is bolted to the sleeve 35. On the inner bottom wall near one end of the rivet gun 32, the telescopic cylinder 34 is slidably installed inside the sleeve 33 and is fixedly connected to the telescopic end of the first cylinder 36. The clamps 35 are fixedly installed on the end of the telescopic cylinder 34 away from the rivet gun 32, and four sets are symmetrically arranged. The outer sides of the four sets of clamps 35 are provided with wedge-shaped surfaces. When the telescopic cylinder 34 retracts, the wedge-shaped surfaces of the four sets of clamps 35 abut against the end of the sleeve 33, so that the four sets of clamps 35 come together and clamp. The nut rivet assembly 4 is installed on the inner side of the telescopic cylinder 34.

[0037] The robotic arm 31 is activated, and its output end moves to move the rivet gun 32 to the screening mechanism 5 for material collection. At this time, the first cylinder 36 is activated, and its telescopic end moves to retract the telescopic cylinder 34 and the four sets of grippers 35, causing the wedge-shaped surfaces of the four sets of grippers 35 to abut against the end of the sleeve 33, so that the four sets of grippers 35 move closer to each other and clamp the mandrel of the rivet screw. Then, the robotic arm 31 moves the rivet gun 32 to the rivet position and activates it. The output end of the rivet gun 32 moves to move the sleeve 33, telescopic cylinder 34, four sets of grippers 35, and the clamped mandrel of the rivet screw backward in sync. The front end of the rivet gun 32 presses against the flange surface of the rivet screw, so that the smooth part of the rivet screw is axially compressed and radially expanded to form a locking head, until the mandrel of the rivet screw is broken at the preset fracture groove, thereby realizing the rivet of the rivet screw.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The nut riveting assembly 4 in this embodiment includes a servo motor 41, a mounting plate 42, a second cylinder 43, and a pull rod 44. Two sets of mounting grooves 45 are symmetrically opened on the inner peripheral wall of the telescopic cylinder 34. The two ends of the mounting plate 42 pass through the two sets of mounting grooves 45 and are fixedly installed on the inner peripheral wall of the sleeve 33. The servo motor 41 is bolted to the end of the mounting plate 42 near the rivet gun 32, and the output end is set through the mounting plate 42. The second cylinder 43 is bolted to the output end of the servo motor 41. The pull rod 44 is fixedly installed on the telescopic end of the second cylinder 43, and the end away from the servo motor 41 is provided with external threads.

[0039] The second cylinder 43 is activated, and its telescopic end moves, causing the pull rod 44 to move to the rivet nut. Then, the servo motor 41 is activated, and with the cooperation of the second cylinder 43, the external thread of the pull rod 44 is screwed into the internal thread of the rivet nut spindle. Subsequently, the robotic arm 31 moves to the rivet position and activates the rivet gun 32. The output end of the rivet gun 32 moves, causing the sleeve 33, mounting plate 42, servo motor 41, second cylinder 43, pull rod 44, and rivet nut spindle to pull backward synchronously. The front end of the rivet gun 32 presses against the flange face of the rivet nut, causing the tubular part of the rivet nut to... The rivet body is axially compressed and radially expanded to form a locking head until the rivet nut mandrel is broken at the preset fracture groove, thereby realizing the riveting of the rivet nut. The same rivet gun 32 can rivet the rivet screw and the rivet nut separately without changing the gun head or quickly changing the entire rivet gun 32. This eliminates the problem of repeated equipment movement and repositioning caused by batch construction, reduces the impact of stress accumulation on the flatness of the shell sealing surface, and the gun head front is simple, making it easy to enter the deep cavity of the shell, flange dead corners and other complex structures for riveting operations.

[0040] Reference Figure 1 , Figure 4 and Figure 5 To screen the rivet screws and rivet nuts, the screening mechanism 5 in this embodiment includes a housing 51, a screening cylinder 52, an auger conveyor 53, a permanent magnet, a conveying assembly 6, and a feeding assembly 7. The housing 51 is bolted to the outer wall of the frame 12. The screening cylinder 52 is vertically fixed inside the housing 51 and located at the end away from the frame 12. The auger conveyor 53 is vertically bolted to the inner bottom wall of the housing 51, and the auger is located inside the screening cylinder 52. A feed inlet 54 is installed in the middle of the side away from the frame 12. An upper discharge port 55 is installed at the upper end of the screening cylinder 52 near the frame 12. A lower discharge port 56 is installed at the lower end of the screening cylinder 52 near the frame 12. Multiple sets of permanent magnets are provided. The multiple sets of permanent magnets are fixedly installed at intervals on the lower surface of the auger. The lower part of the auger and the end near the upper discharge port 55 are not installed. The conveying component 6 is installed inside the box 51. The feeding component 7 is installed at the end of the box 51 away from the screening cylinder 52.

[0041] The rivet screw and rivet nut are added into the screening cylinder 52 through the feed inlet 54. Then, the auger conveyor 53 is started. As the auger rotates, the magnetic rivet screw is attracted to the upper surface of the blades by permanent magnets and rises with the auger, exiting through the upper discharge port 55. The non-magnetic rivet nut is not attracted and settles under gravity, exiting through the lower discharge port 56. No permanent magnet is installed at the end of the auger near the upper discharge port 55, allowing the rivet screw to easily detach from the blades in the discharge area. Rivet screws that are not immediately attracted after entering through the feed inlet 54 continue to slide down under gravity. Multiple sets of permanent magnets added to the lower part of the auger can... The rivet screw that slips off is intercepted and adsorbed midway to prevent it from falling to the lower end of the screening cylinder 52 and mixing with the rivet nut, thereby ensuring the purity of the magnetic screening of the rivet screw and rivet nut and realizing the integrated automatic screening of the rivet nut and rivet screw in the same screening cylinder 52; In this embodiment, the auger blade of the auger conveyor 53 is made of non-magnetic material. The non-magnetic material allows the magnetic lines of force generated by the permanent magnet to penetrate the thickness of the blade and act on the upper surface of the blade, forming a magnetic field of sufficient strength on the upper surface of the blade to adsorb the rivet screw, thereby ensuring the adsorption reliability and screening efficiency of the rivet screw during the vertical auger conveying process.

[0042] Reference Figure 4 and Figure 5After screening, the rivet screw and rivet nut may be in a disordered state, which is not conducive to feeding. Therefore, the conveying component 6 in this embodiment includes an upper arc-shaped cylinder 61, a lower arc-shaped cylinder 62, an upper conveying roller 63, and a lower conveying roller 64. The upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62 are both fixedly installed on the inner side wall of the box 51. The upper arc-shaped cylinder 61 is fixedly installed at the lower end of the upper discharge port 55, and the lower arc-shaped cylinder 62 is fixedly installed at the lower end of the lower discharge port 56. A through groove 65 is opened on the bottom wall of the upper arc-shaped cylinder 61, and a groove 66 is opened on the bottom wall of the lower arc-shaped cylinder 62. Multiple sets of upper conveying rollers 63 are provided. Multiple sets of upper conveying rollers 63 are spaced apart and symmetrically installed on both sides of the lower end of the through groove 65. The ends of the multiple sets of upper conveying rollers 63 on both sides that are close to each other are inclined downward. Multiple sets of lower conveying rollers 64 are provided. Multiple sets of lower conveying rollers 64 are spaced apart and symmetrically installed on both sides of the lower end of the groove 66.

[0043] The rivet screw and rivet nut fall into the upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62, respectively. A passage groove 65 on the bottom wall of the upper arc-shaped cylinder 61 allows any rivet nuts mixed in with the rivet screw to pass through and fall into the lower arc-shaped cylinder 62. Simultaneously, the arc-shaped surface helps keep the rivet screw vertically suspended within the passage groove 65. A groove 66 on the bottom wall of the lower arc-shaped cylinder 62, with the assistance of the arc-shaped surface, keeps the rivet nut vertically suspended within the groove 66. Multiple sets of upper conveyor rollers 63 rotate to frictionally convey the vertically suspended rivet screw, while multiple sets of lower conveyor rollers 64 provide friction to the vertically suspended rivet screw. The rivet nuts are conveyed by friction, which automatically adjusts the rivet screw and rivet nuts from an arbitrary falling posture to a uniform vertical hanging posture, providing a consistent part orientation for subsequent material feeding. The rivet screw and rivet nuts are conveyed by rollers. The upper conveyor rollers 63 are inclined downward at the ends that are close to each other, which allows the rivet nuts that fall between the two sets of upper conveyor rollers 63 to automatically slide downward along the inclined surface of the rollers and fall to the bottom, preventing the rivet nuts from being stuck between the two sets of upper conveyor rollers 63 and unable to be discharged. This ensures that the conveying of the rivet screw by the upper conveyor rollers 63 is not interfered with by the mixed rivet nuts.

[0044] Reference Figure 1 , Figure 2 and Figure 4To separately feed the rivet screw and rivet nut, the feeding assembly 7 in this embodiment includes a first drive motor 71, a first baffle blade 72, a second drive motor 73, a second baffle blade 74, a screw conveying pipe 75, a nut conveying pipe 76, a three-way valve 77, a receiving plate 78, and a receiving tray 79. The first drive motor 71 is bolted to the side wall of the housing 51 near the frame 12, and its output end penetrates through the housing 51. The first baffle blade 72 is fixedly installed on the output end of the first drive motor 71 and is located at the end of the through groove 65 away from the upper discharge port 55. The second drive motor 73 is bolted to the side wall of the housing 51 near the frame 12, and its output end penetrates through the housing. The body 51 is configured such that the second baffle blade 74 is fixedly installed on the output end of the second drive motor 73 and is located at the end of the groove 66 away from the lower discharge port 56; the screw conveying pipe 75 is fixedly installed on the lower end of the first baffle blade 72 and is fixedly connected to the housing 51; the nut conveying pipe 76 is fixedly installed on the lower end of the second baffle blade 74 and its lower end is connected to the screw conveying pipe 75; the receiving plate 78 is fixedly installed on the lower end of the sliding block 14; the receiving disc 79 is rotatably installed on the upper end of the receiving plate 78; and the three-way valve 77 is fixedly installed at the connection between the screw conveying pipe 75 and the nut conveying pipe 76, and the other two ends of the three-way valve 77 are respectively connected to the receiving plate 78 through hoses and to the external air supply system.

[0045] The first drive motor 71 is started, and the output end of the first drive motor 71 rotates, driving the first baffle blade 72 to rotate. Each rotation of the first baffle blade 72 releases a single rivet screw into the screw conveying pipe 75. When rivet nuts need to be riveted, the second drive motor 73 is started, and the output end of the second drive motor 73 rotates, driving the second baffle blade 74 to rotate. Each rotation of the second baffle blade 74 releases a single rivet nut into the nut conveying pipe 76. Then, the air path is switched through the three-way valve 77 to connect the external air supply system with the hose, thereby blowing the rivet screw or rivet nut through the hose to the receiving plate 79 at the receiving plate 78. This simplifies the pipeline layout and reduces the risk of pipeline entanglement and maintenance difficulty caused by the dynamic arrangement of two sets of independent supply pipelines.

[0046] Reference Figure 4 and Figure 5To prevent material supply interruption or jamming caused by incorrect part posture, in this embodiment, a lever plate 8 is rotatably installed on the inner sidewall of the upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62, and a third drive motor 81 is bolted to the outer sidewall of the upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62, and the output end of the third drive motor 81 is fixedly connected to the lever plate 8. When the third drive motor 81 is started, the output end of the third drive motor 81 rotates, driving the lever plate 8 to rotate inside the upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62, thereby leveraging the rivet screws and rivet nuts that are not in a vertical state and have not fallen into the through groove 65 or the recess 66, so that they fall into the through groove 65 or the recess 66 under the action of the arc surface of the upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62, reducing material supply interruption or jamming caused by incorrect part posture, and improving the reliability of vertical alignment of the conveying assembly 6 and the continuity of material supply.

[0047] Reference Figure 1 and Figure 6 In this embodiment, a rotary cylinder 9 is bolted to the upper end of the receiving plate 78, and its output end is fixedly connected to the receiving tray 79. The upper end of the receiving tray 79 is provided with a clamping groove 91, and the bottom wall of the clamping groove 91 is provided with a snap-fit ​​groove 92. When the rotary cylinder 9 is activated, the output end of the rotary cylinder 9 rotates, causing the receiving tray 79 to rotate directly below the outlet of the feeding pipeline, so that the rivet screw or rivet nut falls precisely into the clamping groove 91 and the snap-fit ​​groove 92, and remains vertical under the constraint of the groove. To prevent parts from being misaligned, which could cause the rivet gun 32 to fail to align with the end of the mandrel or the clamping position when picking up the parts, resulting in picking failure or riveting misalignment, the receiving tray 79 is then rotated to a suitable picking position by the rotary cylinder 9, thereby reducing the spatial interference of the material supply line on the picking action of the rivet gun 32. At the same time, the clamping groove 91 and the snap-fit ​​groove 92 provide the rivet gun 32 with a fixed vertical part posture, and facilitate the rivet gun 32's jaws 35 or pull rod 44 to quickly and accurately complete the picking.

[0048] Reference Figure 3 In this embodiment, a tension sensor 321 is fixedly installed between the output end of the rivet gun 32 and the sleeve 33, and a laser displacement sensor 322 is fixedly installed on the output end of the rivet gun 32. During the riveting process, the tension sensor 321 detects the axial tension applied to the sleeve 33 by the output end of the rivet gun 32 in real time, and the laser displacement sensor 322 detects the axial displacement of the sleeve 33 in real time. By collecting force and displacement data during the riveting process through the tension sensor 321 and the laser displacement sensor 322, a force-displacement curve can be generated in real time and the riveting quality can be determined. This enables unified quality monitoring under both the rivet nut and rivet screw process modes, provides data support for process parameter optimization, and helps ensure the consistency and reliability of the riveting connection strength.

[0049] The implementation principle of a riveting device for assembling a new energy battery pack casing in this application embodiment is as follows: The robotic arm 31 is activated, and its output end moves to move the rivet gun 32 to the screening mechanism 5 for material collection. The first cylinder 36 is activated, and its telescopic end moves to retract the telescopic cylinder 34 and the four sets of grippers 35, causing the wedge-shaped surfaces of the four sets of grippers 35 to abut against the end of the sleeve 33, bringing the four sets of grippers 35 closer together and clamping the mandrel of the rivet screw. Then, the robotic arm 31 moves the rivet gun 32 to the rivet position and activates it. The output end of the rivet gun 32 moves to move the sleeve 33, telescopic cylinder 34, four sets of grippers 35, and the clamped mandrel of the rivet screw backward in sync. The front end of the rivet gun 32 presses against the flange surface of the rivet screw, causing the smooth part of the rivet screw to be axially compressed and radially expanded to form a locking head, until the mandrel of the rivet screw is broken at the preset fracture groove, thereby realizing the rivet screw.

[0050] The second cylinder 43 is activated, and the extension end of the second cylinder 43 moves to move the pull rod 44 to the rivet nut. The servo motor 41 is activated, and with the cooperation of the second cylinder 43, the external thread of the pull rod 44 is screwed into the internal thread of the rivet nut spindle. The mechanical arm 31 moves to the rivet position and the rivet gun 32 is activated. The output end of the rivet gun 32 moves to drive the sleeve 33, mounting plate 42, servo motor 41, second cylinder 43, pull rod 44 and rivet nut spindle to pull back synchronously. The front end of the rivet gun 32 presses against the flange face of the rivet nut, so that the tubular rivet body of the rivet nut is axially compressed and radially expanded to form a locking head until the rivet nut spindle is broken at the preset fracture groove, thereby realizing the rivet nut. The rivet screw and rivet nut are added into the screening cylinder 52 through the feed port 54. Then, the auger conveyor 53 is started. When the auger rotates, the magnetic rivet screw is attracted to the upper surface of the blade by the permanent magnet and rises with the auger spiral and is discharged at the upper discharge port 55. The non-magnetic rivet nut is not attracted and settles under the action of gravity and is discharged at the lower discharge port 56. The end of the auger near the upper discharge port 55 is not equipped with a permanent magnet, so that the rivet screw can be smoothly separated from the blade in the discharge area. The rivet screw that is not immediately attracted after entering through the feed port 54 continues to slide down under the action of gravity. The multiple sets of permanent magnets added in the middle and lower part of the auger can intercept and attract the sliding rivet screw in the middle, preventing the rivet screw from sliding down to the lower end of the screening cylinder 52 and mixing with the rivet nut, thereby ensuring the magnetic screening purity of the rivet screw and rivet nut. The rivet screw and rivet nut fall into the upper arc-shaped cylinder 61 and the lower arc-shaped cylinder 62 respectively. The passage groove 65 opened on the bottom wall of the upper arc-shaped cylinder 61 allows individual rivet nuts mixed in with the rivet screw to pass through and fall into the lower arc-shaped cylinder 62. At the same time, with the cooperation of the arc-shaped surface, the rivet screw is kept vertical and suspended in the passage groove 65. The groove 66 opened on the bottom wall of the lower arc-shaped cylinder 62, with the cooperation of the arc-shaped surface, keeps the rivet nut in a vertical position and is suspended in the groove 66. When the multiple sets of upper conveying rollers 63 rotate, they perform frictional conveying on the vertically suspended rivet screw, and the multiple sets of lower conveying rollers 64 perform frictional conveying on the vertically suspended rivet nut, so that the rivet screw and rivet nut are automatically adjusted from arbitrary falling posture to a uniform vertical suspension posture. The first drive motor 71 is started, and the output end of the first drive motor 71 rotates, driving the first baffle blade 72 to rotate. Each rotation of the first baffle blade 72 releases a single rivet screw into the screw conveying pipe 75. When rivet nuts need to be riveted, the second drive motor 73 is started, and the output end of the second drive motor 73 rotates, driving the second baffle blade 74 to rotate. Each rotation of the second baffle blade 74 releases a single rivet nut into the nut conveying pipe 76. Then, the air path is switched through the three-way valve 77 to connect the external air supply system with the hose, thereby blowing the rivet screw or rivet nut through the hose onto the receiving tray 79 at the receiving plate 78.

[0051] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A riveting device for assembling the casing of a new energy battery pack, comprising a riveting table (1) and a clamping device, characterized in that: The upper end of the riveting table (1) is provided with a placement slot (11) for placing the battery pack housing. The clamping device is provided on the side wall of the placement slot (11). The upper end of the riveting table (1) is provided with a frame (12). The upper end of the frame (12) is provided with a sliding frame (13) along the length direction of the frame (12). The upper end of the sliding frame (13) is provided with a sliding block (14) along the width direction of the frame (12). The upper end of the frame (12) is provided with a driving component (2) for driving the sliding frame (13) and the sliding block (14). The lower end of the sliding block (14) is provided with a riveting mechanism (3) for riveting the rivet nut and the rivet screw. The side wall of the frame (12) is provided with a screening mechanism (5) for screening the rivet nut and the rivet screw and feeding the riveting mechanism (3).

2. The riveting equipment for assembling a new energy battery pack casing according to claim 1, characterized in that: The drive assembly (2) includes a first lead screw motor (21) and a second lead screw motor (22). The first lead screw motor (21) is located at the upper end of the frame (12), and the lead screw is threaded to one end of the sliding frame (13). The second lead screw motor (22) is located at the upper end of the sliding frame (13), and the lead screw is threaded to the upper end of the sliding block (14).

3. The riveting equipment for assembling a new energy battery pack casing according to claim 1, characterized in that: The riveting mechanism (3) includes a robotic arm (31), a riveting gun (32), a sleeve (33), a telescopic cylinder (34), a gripper (35), a first cylinder (36), and a nut riveting assembly (4). The robotic arm (31) is located at the lower end of the sliding block (14). The riveting gun (32) is located on the output end of the robotic arm (31). The sleeve (33) is slidably located inside the housing of the riveting gun (32) and is fixedly connected to the output end of the riveting gun (32). The first cylinder (36) is located on the inner bottom wall of the sleeve (33) near the end of the riveting gun (32). The telescopic cylinder (34) is slidably disposed inside the sleeve (33) and fixedly connected to the telescopic end of the first cylinder (36). The clamps (35) are disposed at the end of the telescopic cylinder (34) away from the rivet gun (32) and are symmetrically arranged in four sets. The outer sides of the four sets of clamps (35) are provided with wedge-shaped surfaces. When the telescopic cylinder (34) retracts, the wedge-shaped surfaces of the four sets of clamps (35) abut against the end of the sleeve (33), so that the four sets of clamps (35) come together and clamp each other. The nut rivet assembly (4) is disposed inside the telescopic cylinder (34) and is used to rivet the rivet nut.

4. The riveting equipment for assembling a new energy battery pack casing according to claim 3, characterized in that: The nut riveting assembly (4) includes a servo motor (41), a mounting plate (42), a second cylinder (43), and a pull rod (44). The inner circumferential wall of the telescopic cylinder (34) is symmetrically provided with two sets of mounting grooves (45) for mounting the mounting plate (42) on the inner circumferential wall of the sleeve (33). The two ends of the mounting plate (42) pass through the two sets of mounting grooves (45) and are set on the inner circumferential wall of the sleeve (33). The servo motor (41) is set at one end of the mounting plate (42) near the rivet gun (32), and its output end passes through the mounting plate (42). The second cylinder (43) is set on the output end of the servo motor (41). The pull rod (44) is set on the telescopic end of the second cylinder (43), and its end away from the servo motor (41) is provided with an external thread for engaging with the internal thread of the rivet nut spindle.

5. The riveting equipment for assembling a new energy battery pack casing according to claim 3, characterized in that: The screening mechanism (5) includes a housing (51), a screening cylinder (52), an auger conveyor (53), a permanent magnet, a conveying assembly (6), and a feeding assembly (7). The housing (51) is located on the outer wall of the frame (12). The screening cylinder (52) is vertically located inside the housing (51) and at one end away from the frame (12). The auger conveyor (53) is vertically located on the inner bottom wall of the housing (51) and is located inside the screening cylinder (52). A feed inlet (54) is provided in the middle of the side of the screening cylinder (52) away from the frame (12). The screening cylinder (52) is close to the frame (12). 2) An upper discharge port (55) is provided on the upper end of one side, and a lower discharge port (56) is provided on the lower end of the screening cylinder (52) near the frame (12). Multiple sets of permanent magnets are provided, and multiple sets of permanent magnets are spaced apart on the lower surface of the auger. The lower part of the auger and the end near the upper discharge port (55) are not provided. The conveying component (6) is provided inside the box (51) to keep the rivet screw and rivet nut in a vertical state and to convey them. The feeding component (7) is provided at the end of the box (51) away from the screening cylinder (52) to feed the rivet screw and rivet nut to the rivet gun (32) respectively.

6. A riveting device for assembling a new energy battery pack casing according to claim 5, characterized in that: The conveying assembly (6) includes an upper arc-shaped cylinder (61), a lower arc-shaped cylinder (62), an upper conveying roller (63), and a lower conveying roller (64). The upper arc-shaped cylinder (61) and the lower arc-shaped cylinder (62) are both disposed on the inner side wall of the housing (51). The upper arc-shaped cylinder (61) is disposed at the lower end of the upper discharge port (55), and the lower arc-shaped cylinder (62) is disposed at the lower end of the lower discharge port (56). The bottom wall of the upper arc-shaped cylinder (61) is provided with a feature for allowing the rivet nut to pass through and for keeping the rivet screw in a vertical position. The passage groove (65) has a groove (66) on the bottom wall of the lower arc-shaped cylinder (62) for keeping the rivet nut in a vertical position. Multiple sets of upper conveying rollers (63) are provided, and the multiple sets of upper conveying rollers (63) are spaced apart and symmetrically arranged on both sides of the lower end of the passage groove (65). The ends of the multiple sets of upper conveying rollers (63) on both sides are inclined downwards. Multiple sets of lower conveying rollers (64) are provided, and the multiple sets of lower conveying rollers (64) are spaced apart and symmetrically arranged on both sides of the lower end of the groove (66).

7. A riveting device for assembling a new energy battery pack casing according to claim 6, characterized in that: The feeding assembly (7) includes a first drive motor (71), a first baffle blade (72), a second drive motor (73), a second baffle blade (74), a screw conveyor pipe (75), a nut conveyor pipe (76), a three-way valve (77), a receiving plate (78), and a receiving tray (79). The first drive motor (71) is located on the side wall of the housing (51) near the frame (12), and its output end penetrates the housing (51). The first baffle blade (72) is located on the output end of the first drive motor (71) and is located at the end of the through groove (65) away from the upper discharge port (55). The second drive motor (73) is located on the side wall of the housing (51) near the frame (12), and its output end penetrates the housing (51). The second baffle blade (74) is located on the side wall of the housing (51) near the frame (12), and its output end penetrates the housing (51). 74) The screw conveying pipe (75) is located at the output end of the second drive motor (73) and at the end of the groove (66) away from the lower discharge port (56). The screw conveying pipe (75) is located at the lower end of the first baffle blade (72) and is fixedly connected to the housing (51). The nut conveying pipe (76) is located at the lower end of the second baffle blade (74) and its lower end is connected to the screw conveying pipe (75). The receiving plate (78) is located at the lower end of the sliding block (14). The receiving disc (79) is rotatably located at the upper end of the receiving plate (78). The three-way valve (77) is located at the connection between the screw conveying pipe (75) and the nut conveying pipe (76). The other two ends of the three-way valve (77) are respectively connected to the receiving plate (78) through hoses and connected to the external air supply system.

8. A riveting device for assembling a new energy battery pack casing according to claim 6, characterized in that: Both the upper arc-shaped cylinder (61) and the lower arc-shaped cylinder (62) are rotatably provided with actuating plates (8) for moving the rivet screws and rivet nuts that are not in a vertical state. Both the upper arc-shaped cylinder (61) and the lower arc-shaped cylinder (62) are provided with third drive motors (81) on their outer side walls, and their output ends are fixedly connected to the actuating plates (8).

9. A riveting device for assembling a new energy battery pack casing according to claim 7, characterized in that: The upper end of the receiving plate (78) is provided with a rotary cylinder (9), and the output end is fixedly connected to the receiving tray (79). The upper end of the receiving tray (79) is provided with a clamping groove (91) for clamping the rivet screw and for easy clamping of the rivet screw. The bottom wall of the clamping groove (91) is provided with a clamping groove (92) for clamping the rivet nut.

10. A riveting device for assembling a new energy battery pack casing according to claim 3, characterized in that: A tension sensor (321) is provided between the output end of the rivet gun (32) and the sleeve (33), and a laser displacement sensor (322) is provided on the output end of the rivet gun (32).

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