Driving shaft three-station assembly detection device

Abstract

A driving shaft three-station assembly detection device comprises a workbench, the workbench is provided with a first workbench and a second workbench which are symmetrically arranged front and back, the first workbench and the second workbench are each provided with a driving shaft assembly device, each driving shaft assembly device comprises a driving shaft supporting and rotating device, and the periphery of a driving shaft is connected with a rubber protection sleeve. The rubber protective sleeve is matched with the hoop locking device; a T-shaped support is arranged between the first workbench and the second workbench, and the two sides of the T-shaped support are connected with hoop locking devices through first guide rails. A third working table is arranged on the side edge of the first working table and the side edge of the second working table, and a driving shaft laser marking device is installed on the third working table. According to the utility model, the hoop locking function of the rubber protective sleeve and the manual visual inspection of flaws in the circumferential direction of the driving shaft are completed through the two driving shaft assembling devices, the marking function is completed in combination with the driving shaft laser marking device, and the driving shaft assembling and marking efficiency is improved under reasonable budget through the semi-automatic process design.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool fixture technical field, especially drive shaft three station assembly detection device. BACKGROUND

[0002] At present, the assembly of automobile drive shaft mainly aims at the hoop holding of rubber protective sleeve and the manual detection and marking of drive shaft surface. The traditional assembly mode mainly relies on manual operation, and has problems such as low efficiency and difficult to guarantee precision. Although a full-automatic mechanical hand solution has appeared in the market, the high equipment cost and complex maintenance requirement make it difficult for small and medium-sized enterprises to bear. Especially in the assembly process of rubber protective sleeve, how to ensure the accurate locking position and uniform stress of the hoop and how to realize the stable support and accurate rotary positioning of the drive shaft in the assembly process are all technical problems to be solved. In addition, the detection and marking process of the surface of the drive shaft usually needs to be completed by separate equipment, which leads to problems such as scattered production line layout, large floor area and poor process connection. There is a lack of a compact device integrating drive shaft support rotation, rubber protective sleeve hoop locking and laser marking in the prior art, which is difficult to meet the requirements of high efficiency, low cost and high precision for modern automobile part production. The prior art needs to be improved in view of the above problems. SUMMARY

[0003] The utility model provides a kind of drive shaft three station assembly detection device with the advantages of high integration, efficiency promotion, high assembly precision and low cost.

[0004] The present application provides a kind of drive shaft three station assembly detection device, including workbench, workbench is installed with front-back symmetry first workbench and second workbench, first workbench and second workbench are installed with drive shaft assembly device, drive shaft assembly device includes drive shaft support rotation device, drive shaft outer periphery is connected rubber protective sleeve, and rubber protective sleeve is locked with hoop locking device;T-shaped support is equipped between first workbench and second workbench, and T-shaped support both sides are connected hoop locking device by first guide rail;The side of first workbench and second workbench is equipped with third workbench, and third workbench is installed with drive shaft laser marking device.

[0005] The drive shaft support rotation device includes a first motor, the first motor is connected to a lead screw nut through a lead screw, the lead screw nut is provided with a sliding mounting seat on the outer periphery, the sliding mounting seat is connected to a second motor on the side, the second motor is connected to a three-jaw chuck, the three-jaw chuck is connected to one end of the drive shaft, and the other end of the drive shaft is connected to a top block.

[0006] The clamping device includes a drive shaft clamping device and a sliding caliper device. The drive shaft clamping device includes a second guide rail, which is connected to a second slider. The top of the second slider is connected to a first cylinder, which is connected to a lifting rod. The lifting rod has a V-shaped notch, which is used to clamp the drive shaft with a V-shaped bracket on the lower side of the drive shaft. The bottom of the V-shaped bracket is connected to a third guide rail via a slider, and the third guide rail is connected to a sliding mounting base.

[0007] The second motor is axially fitted with a pressure sensor.

[0008] The sliding caliper device includes a first slider that engages with a first guide rail. The first slider is connected to a lifting cylinder via a guide shaft. The side of the lifting cylinder is connected to an electric caliper via a connecting plate. The electric caliper is controlled by a caliper motor and engages with a clamp located on the outer periphery of the drive shaft.

[0009] The drive shaft laser marking device includes a laser marker, which is placed on the drive shaft of the third worktable. The drive shaft is fitted with two or more support roller assemblies. The support roller assembly includes two rollers that radially clamp the outer periphery of the drive shaft. The two rollers are connected to roller seats, and the bottom of the roller seats is connected to a fourth guide rail via a fourth slider.

[0010] As can be seen from the above, the three-station assembly and testing device for drive shaft provided in this application, as well as its drive shaft support rotation device, clamp locking device and drive shaft laser marking device, integrate the functions of drive shaft support rotation, clamp locking and laser marking into the same device, realize multi-station collaborative operation, solve the problems of low efficiency and poor accuracy of traditional manual operation and high cost caused by equipment dispersion, and have the advantages of high integration, improved efficiency, high assembly accuracy and low cost. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings:

[0012] Figure 1 This is a three-dimensional structural diagram of a three-station assembly and testing device for a drive shaft according to the present invention;

[0013] Figure 2 This is a three-dimensional structural diagram of a three-station assembly and testing device for a drive shaft according to this utility model from another angle.

[0014] Figure 3 This is a schematic diagram of the drive shaft support rotation device in this utility model;

[0015] Figure 4 This is a three-dimensional structural diagram of the drive shaft laser marking device in this utility model;

[0016] Figure 5 This is a three-dimensional structural diagram of the clamp locking device in this utility model. Detailed Implementation

[0017] The following is in conjunction with the appendix Figures 1-5 The specific implementation method further illustrates the technical solution of this patent.

[0018] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In existing technologies, the assembly process of automotive drive shafts mainly relies on manual labor for installing rubber protective sleeve clamps and performing surface inspection and marking. This traditional method is inefficient and suffers from inconsistent quality. While fully automated robotic solutions can improve accuracy, their high cost makes them difficult to implement in small and medium-sized enterprises. A certain automotive parts manufacturing workshop faces an increased monthly production demand for drive shafts and urgently needs a low- to medium-cost automated device capable of simultaneously performing multi-station assembly and inspection. However, existing technologies cannot achieve a balance between clamp locking accuracy and inspection efficiency within a limited budget.

[0020] To address these issues, researchers discovered that misalignment of the clamp positioning and lack of drive shaft rotation control during manual operation were the main factors causing fluctuations in assembly quality. Analysis of the cost structure of automated equipment revealed that the motion control module of the multi-axis robot accounted for over 60% of the total cost. Therefore, a solution was proposed to replace the complex robotic arm with a fixed-station collaborative operation, achieving parallel operation of three stations by optimizing the station layout. The key focus was on overcoming the technical challenges of drive shaft rotation positioning and synchronous clamp locking, and developing modular assembly units to reduce equipment manufacturing costs.

[0021] Therefore, this application proposes a three-station assembly and inspection device for drive shafts, including a worktable 80, on which a first worktable 8 and a second worktable 10 are symmetrically arranged front and rear. Both the first worktable 8 and the second worktable 10 are equipped with drive shaft assembly devices 7. The drive shaft assembly device 7 includes a drive shaft support and rotation device, and a rubber protective sleeve 19 is connected to the outer periphery of the drive shaft 22. The rubber protective sleeve 19 is fitted with a clamp locking device. A T-shaped bracket 2 is provided between the first worktable 8 and the second worktable 10. Both sides of the T-shaped bracket 2 are connected to the clamp locking device through a first guide rail 31. A third worktable 6 is provided on the side of the first worktable 8 and the second worktable 10. The third worktable 6 is equipped with a drive shaft laser marking device.

[0022] The drive shaft support rotation device refers to a mechanism capable of axial positioning and circumferential rotation. Specifically, it can employ a motor-driven three-jaw chuck and a top block to clamp both ends of the drive shaft, ensuring the clamp's installation position accuracy through rotational control. The T-shaped bracket refers to a support frame with a laterally extending structure, specifically constructed from welded steel plates forming an I-shaped cross-section. Its side guide rail layout ensures the clamp locking device moves along a predetermined trajectory. The clamp locking device is a constraint mechanism used to fix the rubber protective sleeve.

[0023] Specifically, after initial assembly on the first worktable, the drive shaft is rotated axially by a support rotation device for manual visual inspection to check for defects. The clamping devices on both sides of the T-shaped bracket move along the guide rail to a predetermined position, and the caliper height is adjusted by a lifting cylinder. Radial pressure is applied to the rubber protective sleeve in stages during the drive shaft's rotation. The drive shaft with the clamps installed is then transferred to the third worktable, where a support roller assembly maintains its radial positioning. A laser marking device performs annular markings on the drive shaft surface while it rotates. The symmetrically arranged dual worktables allow for alternating operations, and the T-shaped bracket, as a shared support structure, reduces the equipment's space requirements.

[0024] Compared to existing technologies, traditional manual operation requires three process transfers and manual positioning and calibration, while this device, through its three-station integrated design, compresses the assembly and testing process into a single piece of equipment. Compared to fully automated robotic arm solutions, the guide rail-guided clamping device reduces manufacturing costs by approximately 40% and significantly lowers maintenance complexity.

[0025] Through the above technical solutions, this application achieves continuous operation of the drive shaft assembly and inspection process. The dual-station parallel operation reduces the single-piece production cycle to one-third of the traditional method. The precise coordination between the clamping device and the drive shaft rotation eliminates positional deviations caused by manual operation, and laser marking maintains consistent marking positions under the positioning of the support rollers. The modular design allows the equipment to adapt to the rapid changeover requirements of drive shafts of different specifications, improving assembly quality stability while controlling costs.

[0026] This application further proposes a drive shaft support rotation device including a first motor 1, the first motor 1 being connected to a lead screw nut via a lead screw, a sliding mounting seat 81 being provided on the outer periphery of the lead screw nut, a second motor 24 being connected to the side of the sliding mounting seat 81, the second motor 24 being connected to a three-jaw chuck 13, the three-jaw chuck 13 being connected to one end of a drive shaft 22, and the other end of the drive shaft 22 being connected to a top contact block 23.

[0027] The first motor is the power source that achieves axial movement through a lead screw transmission mechanism. Specifically, it can be a stepper motor or a servo motor. The screw thread engagement between the lead screw and the lead screw nut converts rotational motion into linear motion, used to adjust the axial position of the drive shaft. The sliding mounting base is the moving component that supports the second motor and the three-jaw chuck. Precise axial displacement is achieved through the engagement between the lead screw nut and the lead screw. Its guide rail structure can be a linear slide rail or a ball screw pair to ensure stability during movement. The second motor is the power unit that drives the rotation of the three-jaw chuck. Specifically, it can be an AC motor with a reducer, connected to the three-jaw chuck via a coupling, used to drive the drive shaft to rotate to complete the assembly process. The three-jaw chuck is the clamp that holds the end of the drive shaft. Its three adjustable jaws can accommodate drive shafts of different diameters, achieving synchronous rotation of the drive shaft and the rotating mechanism through radial clamping. The top block is the support component that contacts the other end of the drive shaft. It can be made of hard alloy material and has a conical or planar structure, used to counteract the axial force generated during drive shaft rotation and maintain axis alignment.

[0028] Specifically, during assembly, the first motor drives the sliding mounting base axially via a lead screw drive, precisely aligning the drive shaft held by the three-jaw chuck with the assembly component at another station. The second motor drives the three-jaw chuck to rotate the drive shaft, while the top block applies axial support force to the other end of the drive shaft, forming a stable rotational support system. When the drive shaft assembly position needs adjustment, the lead screw drive mechanism can achieve millimeter-level position adjustment; for example, the lead screw lead can be selected as 4mm or 5mm, and micrometer-level positioning is achieved through pulse control of a stepper motor. The jaw spacing of the three-jaw chuck can be adapted to different drive shaft specifications via a threaded adjustment mechanism, and its clamping force can be controlled within a preset range by a torque limiter.

[0029] Compared to existing technologies, traditional drive shaft assembly devices mostly employ fixed support structures, requiring manual adjustment of shims for axial positioning. This solution, however, utilizes a combination of screw drive and sliding mounting base to achieve automatic axial position adjustment, reducing the need for manual intervention. Existing technologies often employ single-end fixed drive shaft rotation supports, which are prone to axial misalignment. This solution, however, uses a top-mounted block and a three-jaw chuck to form a double-end support structure, effectively improving rotational stability.

[0030] Through the above technical solution, this application solves the problems of low positioning accuracy and poor support stability in the traditional drive shaft assembly process, achieving precise positioning and stable rotation of the drive shaft in the assembly process. The combined application of a lead screw drive mechanism and an adjustable three-jaw chuck improves the level of assembly automation while reducing equipment modification costs. The double-end support structure design effectively avoids axial movement caused by high-speed rotation of the drive shaft, ensuring the coaxiality requirements during the assembly of the rubber protective sleeve.

[0031] This application further proposes a clamping device including a drive shaft clamping device and a sliding caliper device. The drive shaft clamping device includes a second guide rail 17, which is connected to a second slider 15. The top of the second slider 15 is connected to a first cylinder 14, which is connected to a lifting rod 21. The lifting rod 21 is provided with a V-shaped bayonet, which is used to clamp the drive shaft 22 with a V-shaped bracket 26 on the lower side of the drive shaft 22. The bottom of the V-shaped bracket 26 is connected to a third guide rail 25 through a slider, and the third guide rail 25 is connected to a sliding mounting base 81.

[0032] The second guide rail is a component that provides horizontal movement guidance for the drive shaft clamping device. It can be implemented using a linear guide rail, and the lateral position adjustment of the clamping device is achieved through the cooperation of the guide rail and the slider. The second slider is a component that slides in cooperation with the second guide rail. It can be a slider structure with ball bearings, and the translational positioning of the clamping device is achieved by the movement of the slider along the guide rail. The first cylinder is the power source that drives the vertical movement of the lifting rod. It can be implemented using a double-acting cylinder, and the lifting rod is lifted by air pressure. The V-shaped latch of the lifting rod is the clamping structure that contacts the drive shaft. It can be made of hard alloy material, and the V-shaped bevel forms line contact with the drive shaft surface, improving clamping stability. The V-shaped chuck is a positioning component fixed below the drive shaft. It can be a split, adjustable structure, and the bidirectional clamping of the drive shaft is achieved through the cooperation of the chuck and the V-shaped latch of the lifting rod. The third guide rail refers to the guide component used to adjust the horizontal position of the V-shaped cassette. Specifically, it can adopt a dovetail groove guide rail structure, and the clamping position can be finely adjusted by the cooperation between the slider and the guide rail.

[0033] Specifically, the drive shaft clamping device uses a first cylinder to drive a lifting rod downwards, causing the V-shaped jaw to form a closed clamp with the V-shaped holder below the drive shaft. Once the drive shaft is clamped, the second guide rail and the second slider move the entire clamping device laterally, coordinating with the sliding caliper device for locking. The V-shaped holder is connected to a sliding mounting base via a third guide rail. When the clamping position needs adjustment, the horizontal coordinates of the holder can be changed by sliding the slider along the third guide rail to accommodate the clamping requirements of different drive shaft sizes. The coordinated action of the clamping device and the sliding caliper device enables automatic positioning and locking of the clamp during drive shaft assembly.

[0034] Compared to existing technologies, traditional manual clamp installation relies on operator experience to judge clamping force and position, which is prone to problems such as clamp misalignment or insufficient locking force. While using a fully automated robotic arm can improve accuracy, the equipment cost is high. This solution uses a combination structure of guide rails and cylinders, utilizing the mechanical self-positioning characteristics of V-shaped jaws and jaw seats. It ensures clamping accuracy while being compatible with different sized drive shafts through an adjustable guide rail system, avoiding the investment in complex control systems and reducing equipment costs.

[0035] Through the above technical solution, this application achieves automated operation of clamping and locking the drive shaft during assembly. The mechanical positioning structure ensures clamping alignment and avoids misalignment problems caused by manual operation. The V-shaped bayonet and the holder can adapt to changes in the outer diameter of the drive shaft. Combined with the multi-directional adjustment capability of the guide rail system, it can adapt to various product specifications without changing the fixture, significantly improving assembly efficiency and consistency.

[0036] This application further proposes that the second motor 24 is axially fitted with a pressure sensor 12.

[0037] The pressure sensor is a sensing element used to detect axial pressure. It can be implemented using a resistance strain gauge sensor or a piezoelectric sensor. Its function is to monitor the axial pressure generated by the output shaft of the second motor when clamping the drive shaft in real time, ensuring that the clamping force is within a reasonable range. Axial alignment with the second motor means that the installation position of the pressure sensor is consistent with the axial direction of the output shaft of the second motor. This can be achieved through a coupling or flange connection structure. Its function is to ensure that the pressure detection direction is consistent with the direction of the clamping force on the drive shaft, avoiding measurement errors.

[0038] Specifically, when the second motor clamps the drive shaft using a three-jaw chuck, a pressure sensor detects the axial pressure generated during clamping in real time and feeds the pressure data back to the control system. For example, if the clamping force exceeds a preset threshold, the control system can automatically reduce the output torque of the second motor to prevent deformation of the rubber protective sleeve due to excessive clamping force; if the clamping force is insufficient, the output torque is increased to ensure reliable fixation of the drive shaft. During this process, the axial alignment between the pressure sensor and the second motor ensures the accuracy of pressure detection and avoids data distortion caused by installation angle deviations.

[0039] Compared with existing technologies, traditional drive shaft clamping devices usually rely on the operator's experience to judge the clamping force, which is prone to instability due to human factors. This solution, through the axial cooperation structure of pressure sensor and second motor, realizes dynamic monitoring and closed-loop control of clamping force, which not only avoids the efficiency bottleneck of manual operation, but also overcomes the high cost of fully automatic robotic arm solutions.

[0040] Through the above technical solution, this application achieves precise control of axial pressure during drive shaft clamping, effectively preventing damage or loosening of the rubber protective sleeve due to abnormal clamping force. At the same time, the automated feedback mechanism reduces the frequency of manual intervention, significantly improving work efficiency while ensuring assembly quality.

[0041] This application further proposes a sliding caliper device including a first slider 3 that cooperates with a first guide rail 31. The first slider 3 is connected to a lifting cylinder 33 via a guide shaft 32. The side of the lifting cylinder 33 is connected to an electric caliper 36 via a connecting plate 34. The electric caliper 36 is controlled by a caliper motor 35. The electric caliper 36 cooperates with a clamp 20 located on the outer periphery of the drive shaft 22.

[0042] The first guide rail is a mechanical structure with linear guiding function, which can be implemented using ball bearing guide rails or sliding guide rails. It supports the linear movement of the first slider and limits its movement trajectory, thereby ensuring the precise horizontal positioning of the caliper device. The guide shaft is a cylindrical component with vertical guiding function, which can be implemented using a structure of a metal shaft and linear bearings. It guides the lifting cylinder to move stably in the vertical direction, preventing the caliper from shifting during lifting. The connecting plate is a plate-like structure used to fix and transmit loads, which can be made of steel or aluminum alloy plates. It rigidly connects the output end of the lifting cylinder to the electric caliper, ensuring the synchronization of their movements. The electric caliper is an electromechanical integrated actuator with clamping function, which can be implemented using a gear and rack mechanism driven by a servo motor. It applies radial clamping force to the clamp around the drive shaft to complete the clamping action. The caliper motor is the rotational power source that drives the electric caliper, which can be a stepper motor or a DC geared motor. By controlling the rotation angle and torque of the motor, the clamping force of the clamp can be precisely adjusted.

[0043] Specifically, after the drive shaft completes the assembly of the rubber protective sleeve, the first slider moves along the first guide rail to the target position. The lifting cylinder drives the connecting plate and electric caliper to descend vertically to the height of the clamp via the guide shaft. After the caliper motor starts, the jaws of the electric caliper apply radial pressure to the clamp on the outer periphery of the drive shaft, causing it to elastically deform and tightly adhere to the surface of the rubber protective sleeve. During this process, the cooperation between the first guide rail and the first slider ensures the horizontal positioning accuracy of the caliper device, the combination of the guide shaft and the lifting cylinder achieves stable vertical movement, and the linkage control between the electric caliper and the caliper motor makes the clamp locking operation adjustable and repeatable.

[0044] Compared to existing technologies, traditional manual operation relies on workers manually adjusting the caliper position and applying clamping force, resulting in low positioning accuracy and inconsistent clamping force. This solution, however, achieves automated positioning and closed-loop control of the clamping force during the clamping process through a guide mechanism of the guide rail and slider, vertical drive of the lifting cylinder, and electromechanical control of the electric caliper. This reduces manual intervention while improving assembly quality and efficiency. Furthermore, compared to fully automated robotic arm solutions, this solution employs a modular mechanical structure, avoiding the need for complex motion trajectory planning and resulting in lower equipment costs.

[0045] Through the above technical solution, this application can precisely control the clamping position and clamping force during the clamp locking process, eliminate assembly errors caused by manual operation, and ensure the sealing and reliability of the connection between the rubber protective sleeve and the drive shaft. At the same time, this device, through a simple mechanical structure combination and motor drive, automates the clamp locking process at a low cost, meeting the actual production needs of small and medium-sized automotive parts enterprises.

[0046] This application further proposes a drive shaft laser marking device including a laser marking device 4, the laser marking device 4 being placed on a drive shaft 22 on a third worktable 6, the drive shaft 22 being fitted with two or more support roller assemblies on its lower side, the support roller assembly including two rollers 30 that radially clamp the outer periphery of the drive shaft 22, the two rollers 30 being connected to a roller seat 29, and the bottom of the roller seat 29 being connected to a fourth guide rail 5 via a fourth slider 28.

[0047] The laser marking device refers to a device that uses a laser beam to permanently mark the surface of the drive shaft. Specifically, it can be achieved using a fiber laser in conjunction with a galvanometer scanning system, with the marking pattern and position controlled by a computer. The support roller assembly is a mechanism used to stably support the drive shaft and assist its rotation. Specifically, it can use nylon rollers with bearings and a spring preload structure to ensure that the drive shaft does not shift radially during marking. The fourth guide rail and fourth slider are linear motion pairs used to adjust the horizontal position of the support roller assembly. Specifically, it can use a combination of a ball bearing linear guide rail and a slider to adaptively adjust the support position according to the length of the drive shaft.

[0048] Specifically, after the drive shaft is moved to the third worktable, its two ends are supported by two roller assemblies. The two rollers, under spring force, radially clamp the drive shaft, and passively rotate as the drive shaft rotates. The operator slides the roller seats along the fourth guide rail to match the support position with the actual length of the drive shaft. The laser marking machine marks the drive shaft surface with a QR code or serial number according to a preset program. During the marking process, the drive shaft can be manually or electrically driven to rotate, ensuring the integrity of the circumferential marking.

[0049] Compared to existing technologies, traditional manual marking requires operators to repeatedly adjust the drive shaft angle and manually fix it, resulting in marking position deviations and low efficiency. This solution achieves radial positioning of the drive shaft in a free-rotating state through a support roller assembly, and, in conjunction with an adjustable guide rail structure, adapts to drive shafts of different lengths, eliminating the need for manual adjustments. Compared to fully automated robotic arm solutions, this structure combines passive support with manual adjustment, significantly reducing equipment costs while ensuring marking accuracy.

[0050] Through the above technical solution, this application solves the problem of marking misalignment caused by unstable workpiece positioning during laser marking of the drive shaft. The support roller assembly enables the drive shaft to rotate freely at multiple angles without power, ensuring that the laser marking device can continuously complete circumferential marking operations. The cooperation between the fourth guide rail and the slider allows the device to quickly adapt to different models of drive shafts, reducing changeover and adjustment time.

[0051] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A three-station assembly and inspection device for a drive shaft, comprising a worktable (80), characterized in that: The workbench (80) is equipped with a first workbench (8) and a second workbench (10) arranged symmetrically in front and behind. Both the first workbench (8) and the second workbench (10) are equipped with a drive shaft assembly device (7). The drive shaft assembly device (7) includes a drive shaft support rotation device. The outer periphery of the drive shaft (22) is connected to a rubber protective sleeve (19). The rubber protective sleeve (19) is used in conjunction with a clamp locking device. A T-shaped bracket (2) is provided between the first workbench (8) and the second workbench (10). Both sides of the T-shaped bracket (2) are connected to the clamp locking device through a first guide rail (31). A third workbench (6) is provided on the side of the first workbench (8) and the second workbench (10). The third workbench (6) is equipped with a drive shaft laser marking device.

2. The three-station assembly and inspection device for drive shafts according to claim 1, characterized in that: The drive shaft support rotation device includes a first motor (1), which is connected to a lead screw nut via a lead screw. A sliding mounting seat (81) is provided on the outer periphery of the lead screw nut. A second motor (24) is connected to the side of the sliding mounting seat (81). The second motor (24) is connected to a three-jaw chuck (13). The three-jaw chuck (13) is connected to one end of the drive shaft (22), and the other end of the drive shaft (22) is connected to a top block (23).

3. The three-station assembly and inspection device for drive shafts according to claim 1, characterized in that: The clamping device includes a drive shaft clamping device and a sliding caliper device. The drive shaft clamping device includes a second guide rail (17), which is connected to a second slider (15). The top of the second slider (15) is connected to a first cylinder (14), and the first cylinder (14) is connected to a lifting rod (21). The lifting rod (21) is provided with a V-shaped slot, which is used to clamp the drive shaft (22) with a V-shaped seat (26) on the lower side of the drive shaft (22). The bottom of the V-shaped seat (26) is connected to a third guide rail (25) through a slider, and the third guide rail (25) is connected to a sliding mounting seat (81).

4. The three-station assembly and inspection device for a drive shaft according to claim 2, characterized in that: The second motor (24) is axially fitted with a pressure sensor (12).

5. The three-station assembly and inspection device for a drive shaft according to claim 3, characterized in that: The sliding caliper device includes a first slider (3) that cooperates with the first guide rail (31). The first slider (3) is connected to the lifting cylinder (33) through the guide shaft (32). The side of the lifting cylinder (33) is connected to the electric caliper (36) through the connecting plate (34). The electric caliper (36) is controlled by the caliper motor (35). The electric caliper (36) cooperates with the clamp (20) located on the outer periphery of the drive shaft (22).

6. The three-station assembly and inspection device for a drive shaft according to claim 1, characterized in that: The drive shaft laser marking device includes a laser marking device (4), which is placed on the drive shaft (22) of the third worktable (6). The drive shaft (22) is equipped with two or more support roller assemblies on its lower side. The support roller assembly includes two rollers (30) that radially clamp the outer periphery of the drive shaft (22). The two rollers (30) are connected to the roller seat (29). The bottom of the roller seat (29) is connected to the fourth guide rail (5) through the fourth slider (28).

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