Transmission shaft assembly final inspection mechanism

Abstract

The utility model relates to a final inspection mechanism for a transmission shaft assembly, which is automatic detection equipment for a transmission shaft of a constant velocity universal joint of a car, and adopts the technical scheme that the final inspection mechanism comprises a rack, a working table plate, a cross beam A, an electronic scale, a read-write device and a camera driving device, an arc support, a V-shaped support and a shape follow-up support are fixedly installed on the bracket, a code scanning gun is fixedly connected to the cross beam A, and the code scanning gun is opposite to the barcode printer. The read-write device comprises double guide columns and a reader-writer, the camera driving device comprises double horizontal guide rails, and a movable end of a servo motor is fixedly connected with one end of a lead screw. By the adoption of the technology, the weight, a sealing ring, a clamping spring and a two-dimensional code of a transmission shaft assembly can be automatically and efficiently detected and scanned, efficiency is high, labor intensity is lowered, and it is guaranteed that the detection and code scanning result is reliable.

Description

Technical Field

[0001] This utility model relates to automatic testing equipment, specifically a final inspection mechanism for drive shaft assemblies. Background Technology

[0002] The constant velocity joint driveshaft of a car consists of a fixed end section, an intermediate shaft, and a moving end section. The fixed end section is directly connected to the wheel hub of the car wheel, and the moving end section is directly connected to the engine differential. The engine's power is transmitted to the wheels through the differential, moving end section, intermediate shaft, fixed end section, and wheel hub, thus driving the wheels to rotate. During the inspection of the driveshaft assembly, weighing is used to determine whether steel balls or grease are missing. Whether it is a missing steel ball, grease, or seal, it will seriously affect the performance of the driveshaft assembly. Missing steel balls, grease, or seals will lead to accelerated wear of parts and abnormal noise; if a retaining ring is missing, the driveshaft will lose its function; missing seals or retaining rings will be discovered at the OEM, leading to customer dissatisfaction and consequences such as production stoppages and returns with claims. At the same time, single-piece traceability is a mandatory requirement for OEMs, which facilitates the rapid identification of batches when quality problems occur, allowing for analysis and problem-solving of related batches. Previously, weighing of drive shaft assemblies was done manually, which could lead to misreading due to human error or visual fatigue. Scanning the QR codes generated for individual drive shaft assembly traceability was done manually with a handheld barcode scanner, resulting in high labor intensity. Seals and retaining rings were inspected visually, but this was also prone to false positives due to human error or visual fatigue. Any of these issues could lead to customer dissatisfaction and even claims. Furthermore, since all these inspections were performed at a single workstation, the process was labor-intensive, time-consuming, inefficient, and impacted delivery. Therefore, there is an urgent need on the assembly site for a machine that can automatically and efficiently inspect and scan the weight of drive shaft assemblies, check for missing seals and retaining rings, and scan individual component traceability QR codes, while ensuring reliable quality. Summary of the Invention

[0003] The purpose of this invention is to provide a final inspection mechanism for drive shaft assemblies. Using this technology, the weight, seals, snap rings, and QR codes of drive shaft assemblies can be automatically and efficiently inspected and scanned. This not only increases efficiency and reduces labor intensity, but also ensures reliable inspection and scanning results.

[0004] The technical solution of this utility model is as follows: a final inspection mechanism for a transmission shaft assembly, including a frame, on which a worktable, a crossbeam A, an electronic scale, a reading and writing device, and a camera drive device are fixedly mounted. A barcode printer is mounted on the worktable, which has a through groove. The electronic scale is located below the worktable, and a bracket is fixedly connected to it. The upper part of the bracket passes through the through groove on the worktable and is located above the worktable. An arc bracket, a V-shaped bracket, and a conformal bracket are fixedly mounted on the bracket. The conformal bracket has a recess, the shape of which matches the shape of the moving end section of the transmission shaft assembly. A sensor is fixedly mounted on the V-shaped bracket. The crossbeam A is fixedly connected to the frame, and a barcode scanner is fixedly connected to it. The barcode scanner and the barcode printer on the worktable are vertically opposite each other. The reading and writing device includes a crossbeam B and a crossbeam C fixedly mounted on the frame. The opposite sides of crossbeams B and C are fixedly connected to double guide pillars. A slider A is slidably connected to the double guide pillars, and a connecting rod is fixedly connected to slider A. Block A, a reader is fixedly connected to connecting block A, and a screw is screwed to the upper part of slider A. The top of the screw contacts the double guide post to fix the relative position between slider A and the double guide post. The camera drive device includes horizontal double guide rails fixed on the frame, limiter A, limiter B, connecting block C, bearing seat A, and bearing seat B. The two ends of the lead screw are supported by bearing seat A and bearing seat B and rotatably connected in the bearing seat. The stationary end of the servo motor is fixed to the frame through connecting block C, and the movable end of the servo motor is fixed to one end of the lead screw through a coupling. Slider B is provided on the horizontal double guide rail and slidably connected thereto. A lead screw nut is fixedly installed behind slider B, and the lead screw is screwed to the lead screw nut. A connecting plate is fixedly connected to slider B, and a background screen is fixedly connected to the connecting plate. Connecting block B is fixedly connected to slider B, and a camera cover is fixedly connected to connecting block B. The camera is installed inside the camera cover. Limiter A and limiter B are located at both ends of the slider B's movement trajectory.

[0005] The frame is fixedly mounted on the rack, and a touch screen and an audible and visual alarm are fixedly mounted on the frame. The touch screen is equipped with a start button and an emergency stop switch.

[0006] The principle of this utility model is as follows: The reader in this technical solution can automatically read the RFID tag adsorbed on the intermediate shaft of the drive shaft assembly and generate a QR code. The barcode printer in this technical solution can automatically print out the QR code. The barcode scanner can automatically scan the printed QR code and transmit it to the database to complete the single-piece traceability process of the drive shaft assembly. The electronic scale in this technical solution can automatically weigh the drive shaft assembly and compare it with the set weight range to determine whether steel balls or grease are missing. If it is within the set weight range, the green light of the audible and visual alarm will light up. If it exceeds the set weight range, the audible and visual alarm will sound an alarm to prompt rectification. The servo motor drives the camera and background screen to the position of the moving end joint of the drive shaft, so that the moving end joint is located between the camera and the background screen. The camera takes a picture of the moving end joint and compares it with the set standard picture. If the comparison result matches, the green light of the audible and visual alarm will light up. If the sealing ring or retaining ring is missing, the audible and visual alarm will sound an alarm to prompt rectification.

[0007] The advantages of this invention are: it can automatically detect and scan the weight, seals, retaining rings, and QR codes of the drive shaft assembly, which is not only highly efficient and reduces the labor intensity of operators, but also ensures 100% reliable detection and scanning results. Previously, weighing the drive shaft assembly was done manually, which could lead to misreading due to human factors or visual fatigue; scanning the QR codes generated for individual drive shaft assembly traceability was done manually with a handheld barcode scanner, which was labor-intensive; seals and retaining rings were inspected visually, but this was prone to misdetection due to human factors or visual fatigue. Whether it's a misjudgment of the drive shaft assembly weight or a missing seal, the performance of the drive shaft will be reduced. If a retaining ring is missing, the drive shaft assembly will lose its function, leading to customer dissatisfaction, claims, or even recalls. Furthermore, since all the above-mentioned inspections are performed at one station, the labor intensity is high, the cycle time is long, the efficiency is low, and delivery is affected. This invention precisely solves these problems, enabling online automatic detection and scanning of the weight, seals, snap rings, and QR codes of the drive shaft assembly, ensuring 100% quality. This improves efficiency, frees up labor, reduces the workload of operators, increases customer satisfaction, and enhances the core competitiveness of enterprises. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of the final inspection mechanism for the transmission shaft assembly of this utility model.

[0009] Figure 2 yes Figure 1 Right view of the camera drive unit.

[0010] Figure 3 yes Figure 2 A schematic diagram of the CC direction in the diagram.

[0011] Figure 4 This is a top view of the bracket.

[0012] Figure 5 yes Figure 1 A top view of the reading and writing device.

[0013] Figure 6 This is a schematic diagram of the drive shaft assembly after the RFID tag has been attached.

[0014] Figure 7 yes Figure 1 Enlarged view of section I.

[0015] Figure 8 yes Figure 1 Enlarged view of section II.

[0016] Figure 9 yes Figure 6 Enlarged view of the middle part of the stem.

[0017] In the diagram: 1. Lead screw, 2. Through slot, 3. Conformal bracket, 4. Double guide column, 5. Electrical control cabinet, 6. Electronic scale, 7. Bracket, 8. Workbench, 9. Frame, 10. Barcode printer, 11. Barcode scanner, 12. Crossbeam A, 13. Emergency stop switch, 14. Start button, 15. Touch screen display, 16. Audible and visual alarm, 17. Arc bracket, 18. Crossbeam B, 19. V-shaped bracket, 20. Reader / writer device, 21. Screw, 22. Slider A, 23. Connecting block A, 24. Reader / writer, 25. Crossbeam C, 26 Limiter A, 27 Bearing Seat A, 28 Slider B, 29 Connecting Plate, 30 Limiter B, 31 Servo Motor, 32 Camera Drive Unit, 33 Frame, 34 Connecting Block C, 35 Bearing Seat B, 36 Horizontal Double Guide Rail, 37 Background Screen, 38 Connecting Block B, 39 Camera Cover, 40 Camera, 41 Recess, 42 Sensor, 43 Snap Ring, 44 Handle, 45 Sealing Ring, 46 Intermediate Shaft, 47 RFID Tag, 48 Moving End Section. Detailed Implementation

[0018] This utility model relates to an inspection mechanism for the final product of a passenger car constant velocity universal joint drive shaft assembly. The following details are in conjunction with the attached... Figure 1-8Example of an embodiment. A final inspection mechanism for a driveshaft assembly includes a frame 9 and a worktable 8. The worktable 8 is fixedly connected to the frame 9. An electronic scale 6, a crossbeam A12, a reader / writer 20, and a camera drive device 32 are fixedly mounted on the frame 9. A barcode printer 10 is mounted on the worktable 8. The worktable 8 has a through groove 2. The electronic scale 6 is located below the worktable 8 and is used to weigh the driveshaft assembly. A bracket 7 is fixedly connected to the electronic scale 6. The upper part of the bracket 7 passes through the through groove 2 on the worktable 8 and is located on top of the worktable 8. An arc-shaped bracket 17, a V-shaped bracket 19, and a conformal bracket 3 are fixedly mounted on the bracket 7. The conformal bracket 3 has a recess 4. 1. The shape of the recess matches the outline of the moving end section of the drive shaft assembly. The function of each bracket and recess is to place the workpiece. A sensor 42 is fixedly mounted on the V-shaped bracket 19. The sensor 42 is used to detect whether there is a workpiece. The crossbeam A12 is fixedly connected to the frame 9. A barcode scanner 11 is fixedly connected to the crossbeam A12. The barcode scanner 11 is vertically opposite to the barcode printer 10 on the worktable 8. The reading and writing device 20 includes a crossbeam B18 and a crossbeam C25 fixedly mounted on the frame 9. The opposite sides of the crossbeams B18 and C25 are fixedly connected to the double guide pillars 4. A slider A22 is slidably connected to the double guide pillars 4. A connecting block A23 is fixedly connected to the slider A22. A reader 24 is fixedly connected to the connecting block A23. The reader is used to read the relevant information of the RFID tag 47. A screw 21 is spirally connected to the upper part of the slider A22. The top of the screw 21 contacts the double guide post 4 to fix the relative position between the slider A22 and the double guide post 4. The camera drive device 32 includes a horizontal double guide rail 36 fixed on the frame 9, a limiter A26, a limiter B30, a connecting block C34, a bearing seat A27, and a bearing seat B35. The two ends of the lead screw 1 are supported by the bearing seats A27 and B35 and are rotatably connected in the bearing seats. The stationary end of the servo motor 31 is fixedly connected to the connecting block C34. On the frame 9, the movable end of the servo motor 31 is fixedly connected to one end of the lead screw 1 via a coupling. The horizontal double guide rail 36 is provided with a slider B28 that is slidably connected to it. A lead screw nut is fixedly installed behind the slider B28. The lead screw 1 is screwed to the lead screw nut. A connecting plate 29 is fixedly connected to the slider B28. A background screen 37 is fixedly connected to the connecting plate 29. A connecting block B38 is fixedly connected to the slider B28. A camera cover 39 is fixedly connected to the connecting block B38. A camera 40 is installed inside the camera cover. The limiters A26 and B30 are located at both ends of the slider B28's movement trajectory. The camera drive device can move the camera to the shooting setting position.

[0019] The frame 9 is fixedly mounted with a frame 33, and an electrical control cabinet is installed at the bottom of the frame. The electrical control cabinet contains a controller. A touch screen display 15 and an audible and visual alarm 16 are fixedly mounted on the frame 33 and are electrically connected to the controller via signal lines. The touch screen display 15 is equipped with a start button 14 and an emergency stop switch 13.

[0020] The final inspection mechanism for this drive shaft assembly is equipped with an automatic control system. The automatic control system includes a controller and execution components that perform different tasks. Each execution component is electrically connected to the controller via signal lines. The execution components include a servo motor 31, a reader / writer 24, an electronic scale 6, a camera 40, a barcode scanner 11, a barcode printer 10, and a sensor 42.

[0021] The moving end section 48 of the drive shaft assembly (workpiece) is provided with a handle 44, on which a sealing ring 45 and a retaining ring 43 are mounted. The RFID tag 47 is magnetically attached to the intermediate shaft 46. The RFID tag 47 remains attached to the intermediate shaft throughout the entire assembly process related to the intermediate shaft 46 until it is removed after the final inspection of the drive shaft assembly.

[0022] The final inspection refers to the final finished product inspection after the drive shaft assembly is assembled.

[0023] RFID stands for Radio Frequency Identification. RFID tags, commonly known as electronic tags, work by enabling non-contact data communication between the reader / writer 24 and the tag to identify targets. RFID is a non-contact automatic identification technology and is currently in use. It automatically identifies target objects and acquires relevant data through radio frequency signals. Identification requires no manual intervention. RFID technology can identify high-speed moving objects and can simultaneously identify multiple tags, making it quick and convenient to operate.

[0024] For single-piece traceability, RFID tags 47 are well-suited. Each assembly process of the drive shaft assembly is identified using RFID tags, and relevant information is linked to them. Finally, all information is generated into a QR code, which is scanned and transmitted to a database. RFID tags 47 typically use magnetic adhesion to fix themselves to the identified target.

[0025] The camera is an industrial high-resolution camera that can accurately identify the differences between the captured target and the stored standard photo by comparing it with a pre-stored standard photo.

[0026] The servo motor 31 is a prior art product. The servo motor 31 is servo controlled and can precisely control the speed, position and torque.

[0027] The human-machine interface of the controller is preferably a touch screen display 15, which is located on the surface of the electrical cabinet or mounted on the frame 33, facilitating operation by on-site personnel. Personnel can control the operation of the entire machine via the touch screen display 15. An audible and visual alarm 16 is installed on the frame 33 or the electrical cabinet to emit specific sounds and lights to indicate the working status of the drive shaft assembly final inspection mechanism, to adjust various parameters, or to provide audible and visual alarms for any malfunctions.

[0028] Working process of the utility model: Press the start button 14, place the transmission shaft assembly (workpiece) on the arc bracket 17, V-shaped bracket 19 and profiling bracket 3, make the mobile end joint 48 of the transmission shaft assembly coincide with the concave nest 41 on the profiling bracket 3, and make the RFID tag 47 adsorbed on the intermediate shaft of the transmission shaft assembly face forward and face the reader-writer 24. When the sensor 42 detects a workpiece, the movable end of the servo motor 31 drives the lead screw 1 through the coupling. The lead screw rotates in the nut fixedly installed behind the slider B28 and drives the slider B28 and the camera 40 and the background screen 37 thereon to run leftward along the double guide rails to the shooting set position (the handle 44 of the mobile end joint 48 of the transmission shaft assembly is located between the camera 40 and the background screen 37). The camera 40 takes a picture of the handle 44 of the mobile end joint 48 and compares it with the stored set standard picture. If it is consistent with the stored set standard picture, that is, there is a sealing ring 45 and a snap ring 43 on the handle 44, it means it is qualified. The servo motor 31 drives the camera 40 to retreat to the set original position, making the handle 44 completely outside the camera 40 and the background screen 37. Synchronously, the electronic scale 6 automatically weighs the transmission shaft assembly. If the weight of the transmission shaft assembly is within the set range, it means it is qualified. The reader-writer 24 reads the relevant information of the RFID tag 47 on the intermediate shaft. The relevant information generates a two-dimensional code, and the barcode printer 10 prints out the generated two-dimensional code. The barcode scanner 11 scans the printed two-dimensional code and transmits the information to the database. If the result after the comparison by the camera 40 is unqualified, or the weight of the transmission shaft assembly is unqualified, the sound and light alarm 16 alarms to prompt rectification. Take down the detected transmission shaft assembly, remove the RFID tag 47, replace it with another transmission shaft assembly to be detected, and enter the next detection cycle according to the same steps above...

Claims

1. A final inspection mechanism for drive shaft assemblies, characterized in that: The system includes a frame (9), on which a worktable (8), a crossbeam A (12), an electronic scale (6), a reading / writing device (20), and a camera drive device (32) are fixedly mounted. A barcode printer (10) is mounted on the worktable (8), and a through groove (2) is provided on the worktable (8). The electronic scale (6) is located below the worktable (8), and a bracket (7) is fixedly connected to the electronic scale (6). The upper part of the bracket (7) passes through the through groove (2) on the worktable (8) and is located above the worktable (8). An arc bracket (17), a V-shaped bracket (19), and a conformal bracket (3) are fixedly mounted on the bracket (7). A recess (41) is provided on the conformal bracket (3), and a sensor (42) is fixedly mounted on the V-shaped bracket (19). A barcode scanner (11) is fixedly connected to the crossbeam A (12), and the barcode scanner (11) is connected to the barcode printer (10) mounted on the worktable (8). The reading and writing device (20) is fixedly mounted on the frame (9) with a crossbeam B (18) and a crossbeam C (25). The crossbeam B (18) and the crossbeam C (25) are fixedly connected to the opposite sides of the crossbeams. A slider A (22) is slidably connected to the double guide pillars (4). A connecting block A (23) is fixedly connected to the slider A (22). A reader (24) is fixedly connected to the connecting block A (23). A screw (21) is screwed to the upper part of the slider A (22). The top of the screw (21) contacts the double guide pillars (4). The camera driving device (32) is fixedly mounted on the frame (9) with a horizontal double guide rail (36), a limiter A (26), a limiter B (30), a connecting block C (34), a bearing seat A (27), and a bearing seat B (35). The two ends of the lead screw (1) are supported by the bearing seat A (27) and the bearing seat B (35). The stationary end of the servo motor (31) is fixed to the frame (9) via the connecting block C (34), and the movable end of the servo motor (31) is fixed to one end of the lead screw (1) via the coupling. The horizontal double guide rail (36) is provided with a slider B (28) that is slidably connected to it. A lead screw nut is fixed behind the slider B (28). The lead screw (1) is screwed to the lead screw nut. A connecting plate (29) is fixed to the slider B (28). A background screen (37) is fixed to the connecting plate (29). A connecting block B (38) is fixed to the slider B (28). A camera cover (39) is fixed to the connecting block B (38). A camera (40) is installed inside the camera cover. The limiters A (26) and B (30) are located at both ends of the movement trajectory of the slider B (28).

2. The final inspection mechanism for the drive shaft assembly according to claim 1, characterized in that: A frame (33) is fixedly mounted on the frame (9), and a touch screen (15) and an audible and visual alarm (16) are fixedly mounted on the frame (33). The touch screen (15) is equipped with a start button (14) and an emergency stop switch (13).

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