A generator rotor, bearing, pulley and nut assembly machine

Abstract

This invention belongs to the field of rechargeable generator assembly technology, specifically relating to an integrated assembly machine for generator rotors, bearings, pulleys, and nuts. It includes a bearing pressing station, a front cover pressing station, and a pulley pressing station. The bearing pressing station contains a bearing pressing module, the front cover pressing station contains a front cover pressing module, and the pulley pressing station contains a pulley pressing module. A thread locking station and a torque verification station are also provided on one side of the pulley pressing station. The thread locking station contains a nut locking module, and the nut locking module has a torque verification module. The worktable also includes a ring track module and an automatic shifting module. This invention integrates the five stations required for rechargeable generator assembly—bearing pressing, front cover pressing, pulley pressing, nut locking, and torque verification—into one unit, achieving locking torque control and detection, and has good market application prospects.

Description

Technical Field

[0001] This invention belongs to the field of charging generator assembly technology, specifically relating to an integrated assembly machine for generator rotor, bearing, pulley and nut. Background Technology

[0002] The existing method for tightening nuts on generators involves using an electric or manual wrench to tighten the nuts through impact force, followed by inspection and reinforcement with a torque wrench. While this method is simple to operate, it suffers from the problem of uncontrollable tightening torque. The torque wrench inspection can only detect insufficient tightening torque, but cannot detect excessive tightening torque. Furthermore, using a torque wrench for inspection not only increases labor time but also carries the risk of missed or false inspections, leading to defective products being released.

[0003] In the prior art, this invention proposes an integrated assembly machine for generator rotors, bearings, pulleys, and nuts. This automated equipment integrates five workstations required for generator assembly: bearing pressing, front cover pressing, pulley pressing, nut tightening, and torque verification. It can control and detect tightening torque, and record assembly process data, equipment status data, and production information, such as bearing pressing force, nut tightening torque, equipment fault information, output, efficiency, and defect rate. The above data is automatically monitored, alarmed, and recorded, and can be exported to a computer for statistical analysis.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated assembly machine for generator rotor, bearing, pulley and nut, so as to integrate the five workstations required for assembling a charging generator, namely the bearing pressing station, the front cover pressing station, the pulley pressing station, the nut tightening station and the torque checking station, into one unit, and realize the control and detection of the tightening torque.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A generator rotor, bearing, pulley, and nut assembly machine includes a frame, a workbench mounted on the frame, and a cover on the workbench. The workbench has four partitions, and a support plate is positioned above the four partitions. The partitions are spaced apart to form a bearing pressing station, a front cover pressing station, and a pulley pressing station. The bearing pressing station contains a bearing pressing module, the front cover pressing station contains a front cover pressing module, and the pulley pressing station contains a pulley pressing module. On the side of the pulley pressing station away from the front cover pressing station, there is also a thread locking station and a torque verification station, both located in the same station. The thread locking station contains a nut locking module, and the nut locking module has a torque verification module.

[0008] The workbench is also equipped with a ring track module and an automatic shifting module; the ring track module is equipped with multiple product seats, and the product seats are driven by the automatic shifting module to move along the ring track module and pass under the pressing bearing station, the pressing front cover station, the pressing pulley station and the locking thread station in sequence.

[0009] Preferably, the frame is equipped with an electrical control cabinet, which has a built-in control system; the machine cover is located on the workbench, and a controller is provided at its front end, with a display screen on the controller; the controller is connected to the electrical control cabinet, which is connected to the bearing pressing module, the front cover pressing module, the pulley pressing module, the nut locking module, the automatic shifting module, and the circular track module.

[0010] Preferably, the support plate is provided with 6 first flange linear bearings; the 4 partitions are divided into a first partition, a second partition, a third partition and a fourth partition; 2 first guide shafts are provided between the second partition and the first partition and the third partition, and the bottom of each first guide shaft is fixed to the worktable by a guide shaft support.

[0011] Preferably, the bearing press-fit module includes a first cylinder, a first pressure sensor, and a first pressure plate; the first cylinder is mounted on the support plate, with its telescopic end penetrating the support plate and facing downwards; one end of the first pressure sensor is connected to the telescopic end of the first cylinder, and the other end is fixedly connected to the upper surface of the first pressure plate; the upper surface of the first pressure plate has two second guide shafts at its front end and two second flange linear bearings at its rear end; the two second guide shafts are slidably guided by the two first flange linear bearings located at corresponding positions at the front end of the first cylinder; the two second flange linear bearings are slidably guided by the two first guide shafts located between the first partition plate and the second partition plate; a first pressure block is provided below the first pressure plate; the front cover press-fit module has the same structure as the bearing press-fit module.

[0012] Preferably, each of the product base plates has a positioning groove on its rear side; the worktable is provided with multiple positioning modules for limiting the position of the product base; the positioning modules are divided into a first positioning module, a second positioning module, a third positioning module, a fourth positioning module, a fifth positioning module, and a sixth positioning module; the first positioning module, the second positioning module, the third positioning module, the fourth positioning module, and the fifth positioning module have the same structure, each controlled by a positioning cylinder to extend and retract a positioning tongue; the first positioning module and the second positioning module are respectively located on both sides of the annular track module; when the positioning tongues of the first positioning module and the second positioning module extend, the positioning tongues pass through the preset openings on both sides of the annular track module and enter the annular track module, and on the moving path of the product base, respectively, they are positioned with the positioning tongues located on the sixth positioning module. The front side of the product base plate below the pressing bearing station and the locking thread station abuts against each other; the third positioning module is located between the first partition and the second partition, and the fourth positioning module is located between the second partition and the third partition; when the positioning tongues of the third positioning module and the fourth positioning module extend, they respectively enter the positioning grooves opened on the rear side of the product base plate below the pressing bearing station, the pressing front cover station, and the pressing pulley station; the sixth positioning module includes a positioning cylinder, a positioning tongue, and a positioning plate located at the front end of the positioning tongue; when the positioning cylinder of the sixth positioning module controls the positioning tongue to extend, the front end of the positioning tongue and the positioning plate located at its front end enter the annular track module and abut against the product base plate located below the pressing pulley station and the locking thread station, respectively.

[0013] Preferably, the belt pulley pressing station includes a third cylinder and a third pressure plate; the third cylinder is mounted on the support plate, with its telescopic end penetrating the support plate and facing downwards; a connecting column is provided on the upper surface of the third pressure plate, and the upper end of the connecting column is connected to the telescopic end of the third cylinder; a fourth guide shaft is provided at each end of the upper surface of the third pressure plate, and the fourth guide shaft is in sliding guide engagement with two first flange linear bearings located on both sides of the third cylinder; a third pressure block is provided below the third pressure plate.

[0014] Preferably, the nut locking module includes a base plate, a top plate, a pressing cylinder, a fixed base, a servo motor, and a torque verification module; four support rods are provided between the base plate and the top plate, and a mounting plate is provided on the two support rods near the front end of the top plate; a fifth linear guide rail is provided on each side of the mounting plate, and a slide block is provided on the linear guide rail for sliding guidance; two slide blocks are connected by a connecting rod; a fixed plate is also provided on the mounting plate, and the pressing cylinder is mounted on the fixed plate; the telescopic end of the pressing cylinder passes through the fixed plate and is connected and fixed to the middle of the connecting rod; the fixed base is located above the front end of the mounting plate, and the servo motor is mounted on the fixed base; the output axis of the servo motor is downward and connected to a reducer; The torque verification module is a torque sensor, which is installed in the fixed base. Its upper end is connected to the output shaft of the reducer, and its lower end passes through the bottom plate and the top plate of the fixed base and is connected to a telescopic universal coupling. A spring is sleeved in the middle of the telescopic universal coupling, and its bottom is connected to a guide seat through a connecting shaft. A guide bearing is provided on each side of the guide seat, and its middle part is passed through by the connecting shaft and fixedly connected to the connecting shaft. A connecting plate is provided below the guide seat, and the end of the connecting plate near the connecting rod is integrally formed with the connecting rod. A guide post is provided on each side of the connecting plate, which slides and guides the corresponding guide bearing. A nut sleeve is connected to the bottom of the connecting shaft, and the lower end of the nut sleeve passes through the connecting plate.

[0015] Preferably, the annular track module includes a rectangular inner track and a rectangular outer track, and the distance between the inner track and the outer track is the same as the width of the product base plate.

[0016] Preferably, the automatic shifting module includes four sets of guide modules. Each set of guide modules includes a push cylinder, a linear guide rail, a guide block, and a push block. The telescopic end of the push cylinder pushes the guide block to move linearly on the linear guide rail. The push block is located on the guide block, and its top cooperates with the product seat at the corresponding position to push the product seat at the corresponding position to move. Among them, the guide module located directly below each workstation is provided with three sets of guide blocks and push blocks, and the other three guide modules are each provided with one set of guide blocks and push blocks.

[0017] Preferably, the worktable is provided with multiple clearance slots for the top of the push block to extend out at the corresponding position.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The generator rotor, bearing, pulley and nut assembly machine of the present invention, combined with the structural characteristics of the charging generator, utilizes automation technology to integrate the five workstations required for the assembly of the charging generator, namely the bearing pressing workstation, the front end cover pressing workstation, the pulley pressing workstation, the nut tightening workstation and the torque verification workstation, into one automated equipment, which is conducive to realizing automated assembly.

[0020] (2) The generator rotor, bearing, pulley and nut assembly machine of the present invention has a nut tightening station and a torque verification station working together to realize online torque detection, and the tightening torque accuracy is high and the tightening efficiency is significantly improved. The servo motor is used to realize the automation of nut tightening, which can not only save time, but also be used with a torque sensor to avoid the problem of uncontrollable torque when using electric or manual wrenches to tighten nuts by impact force.

[0021] (3) The generator rotor, bearing, pulley and nut assembly machine of the present invention has a simple and practical human-machine interface on the controller display screen, and staff can easily learn to operate it after simple training; the tightening data can be automatically recorded and summarized for analysis, and quality control can be easily achieved; and different models of generator nuts can be tightened by changing tooling, which is highly flexible. Attached Figure Description

[0022] Figure 1 This is an external schematic diagram of the present invention;

[0023] Figure 2 yes Figure 1 The main view;

[0024] Figure 3 This is a side view of the present invention;

[0025] Figure 4 This is a flowchart of the device operation of the present invention;

[0026] Explanation of key figure labels:

[0027] 1. Frame; 2. Workbench; 3. Machine cover; 4. Partition; 5. Support plate; 6. Bearing press-fit module; 7. Front cover press-fit module; 8. Pulley press-fit module; 9. Nut locking module; 10. Torque verification module; 11. Circular track module; 12. Product seat; 13. Controller; 14. Positioning module; 15. Audible and visual alarm; 16. Safety light curtain; 17. Servo motor; 18. Automatic card rotation module. Detailed Implementation

[0028] The technical solution of this invention patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0029] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] See attached document Figure 1-4A generator rotor, bearing, pulley, and nut assembly machine includes a frame 1, a workbench 2 mounted on the frame 1, and a cover 3 mounted on the workbench 2. The workbench 2 has four partitions 4, with a support plate 5 above each partition 4. The partitions 4 are spaced apart to form a bearing pressing station, a front cover pressing station, and a pulley pressing station. The bearing pressing station contains a bearing pressing module 6, the front cover pressing station contains a front cover pressing module 7, and the pulley pressing station contains a pulley pressing module 8. The pulley pressing station, away from the front cover pressing station, also has a thread locking station and a torque verification station, both located within the same station. The thread locking station contains a nut locking module 9, and the nut locking module 9 has a torque verification module 10.

[0032] The workbench 2 is also equipped with a ring track module 11 and an automatic transfer module; the ring track module 11 is equipped with multiple product seats 12, which are driven by the automatic transfer module to move along the ring track module 11 and pass under the pressing bearing station, pressing front cover station, pressing pulley station and locking thread station in sequence.

[0033] The frame 1 is equipped with an electrical control cabinet, which contains a control system and a set of control elements. The cover 3 is located on the workbench 2, and a controller 13 is located at its front end. The controller 13 is equipped with a display screen. The controller 13 is connected to the electrical control cabinet, and the electrical control cabinet is connected to the bearing pressing module 6, the front cover pressing module 7, the pulley pressing module 8, the nut locking module 9, the automatic shifting module, and the circular track module 11 through various control elements. The front end of the workbench 2 is also equipped with an emergency stop button switch and two start button switches for use.

[0034] In this embodiment, the support plate 5 is provided with 6 first flange linear bearings; the 4 partitions 4 are divided into a first partition, a second partition, a third partition and a fourth partition; 2 first guide shafts are provided between the second partition and the first partition and the third partition, and the bottom of the first guide shaft is fixed on the worktable 2 by a guide shaft support.

[0035] The bearing press-fit module 6 includes a first cylinder, a first pressure sensor, and a first pressure plate. The first cylinder is mounted on a support plate 5, with its telescopic end penetrating the support plate 5 and facing downwards. One end of the first pressure sensor is connected to the telescopic end of the first cylinder, and the other end is fixedly connected to the upper surface of the first pressure plate. The upper surface of the first pressure plate has two second guide shafts at its front end and two second flange linear bearings at its rear end. The two second guide shafts are slidably guided by the two first flange linear bearings located at corresponding positions at the front end of the first cylinder. The two second flange linear bearings are slidably guided by the two first guide shafts located between the first partition plate and the second partition plate. A first pressure block is provided below the first pressure plate.

[0036] The front cover pressing module 7 has the same structure as the bearing pressing module 6, including a second cylinder, a second pressure sensor, and a second pressure plate. The second cylinder is mounted on the support plate 5, with its telescopic end penetrating the support plate 5 and facing downwards. One end of the second pressure sensor is connected to the telescopic end of the second cylinder, and the other end is fixedly connected to the upper surface of the second pressure plate. The upper surface of the second pressure plate has two third guide shafts at its front end and two third flange linear bearings at its rear end. The two third guide shafts are slidably guided by the two first flange linear bearings located at corresponding positions at the front end of the second cylinder. The two third flange linear bearings are slidably guided by the two first guide shafts located between the second partition and the third partition. A second pressure block is located below the second pressure plate.

[0037] The workbench 2 is equipped with multiple positioning modules 14, used to limit the position of the product seat 12 and adjust and reposition the product seat 12 in the X and Y directions with secondary precision. The positioning modules 14 are divided into a first positioning module, a second positioning module, a third positioning module, a fourth positioning module, a fifth positioning module, and a sixth positioning module. Among them, the first positioning module, the second positioning module, the third positioning module, the fourth positioning module, and the fifth positioning module have the same structure, and each is controlled by a positioning cylinder to extend and retract a positioning tongue. The first and second positioning modules are located on opposite sides of the annular track module 11. When the positioning tongues of the first and second positioning modules extend, they pass through the pre-set openings on both sides of the annular track module 11 and enter the annular track module 11. Along the movement path of the product seat 12, the positioning tongues abut against the front side of the base plate of the product seat 12 located below the pressing bearing station and the locking thread station, respectively. The third positioning module is located between the first and second partitions, and the fourth positioning module is located between the second and third partitions. When the positioning tongues of the third and fourth positioning modules extend, they enter the positioning grooves opened on the rear side of the base plate of the product seat 12 located below the pressing bearing station, the pressing front cover station, and the pressing pulley station, respectively. It should be noted that each product seat 12 base plate has a positioning groove on its rear side. The sixth positioning module includes a positioning cylinder, a positioning tongue, and a positioning plate located at the front end of the positioning tongue. When the positioning cylinder of the sixth positioning module controls the positioning tongue to extend, the front end of the positioning tongue and the positioning plate located at its front end enter the annular track module 11 and abut against the bottom plate of the product seat 12 located below the pressure belt pulley station and the locking thread station, respectively, which can prevent the product seat 12 from rotating.

[0038] The belt pulley pressing station includes a third cylinder and a third pressure plate; the third cylinder is mounted on the support plate 5, with its telescopic end penetrating the support plate 5 and facing downwards; a connecting column is provided on the upper surface of the third pressure plate, and the upper end of the connecting column is connected to the telescopic end of the third cylinder; a fourth guide shaft is provided at each end of the upper surface of the third pressure plate, and the fourth guide shaft is in sliding guide engagement with two first flange linear bearings located on both sides of the third cylinder; a third pressure block is provided below the third pressure plate.

[0039] The nut locking module 9 includes a base plate, a top plate, a pressing cylinder, a fixed base, a servo motor 17, and a torque verification module 10. Four support rods are provided between the base plate and the top plate, with a mounting plate on the two support rods closest to the front end of the top plate. A fifth linear guide rail is provided on each side of the mounting plate, with a sliding block on each guide rail for sliding guidance. Two sliding blocks are connected by a connecting rod. A fixed plate is also provided on the mounting plate, and the pressing cylinder is mounted on the fixed plate. The telescopic end of the pressing cylinder passes through the fixed plate and is connected and fixed to the middle of the connecting rod. The fixed base is located above the front end of the mounting plate, and the servo motor 17 is mounted on the fixed base. The output shaft of the servo motor 17 points downwards and is connected to a reducer. The torque verification module 10 is a torque sensor, which is installed in a fixed base. Its upper end is connected to the output shaft of the reducer, and its lower end passes through the bottom plate and top plate of the fixed base and is connected to a telescopic universal coupling. A spring is sleeved in the middle of the telescopic universal coupling, and its bottom is connected to a guide seat through a connecting shaft. A guide bearing is provided on each side of the guide seat, and its middle part is passed through by the connecting shaft and fixedly connected to the connecting shaft. A connecting plate is provided below the guide seat, and the end of the connecting plate near the connecting rod is integrally formed with the connecting rod. A guide post is provided on each side of the connecting plate, which slides and guides the guide bearing at the corresponding position. A nut sleeve is connected to the bottom of the connecting shaft, and the lower end of the nut sleeve passes through the connecting plate.

[0040] The annular track module 11 includes a rectangular inner track and a rectangular outer track, with the distance between the inner and outer tracks being the same as the width of the product base 12. The outer track has pre-set openings near the corresponding positions of each positioning module 14 for the positioning tongue and positioning block to enter or retract. The side of the annular track module 11 closest to the start button switch and emergency stop button switch is a material storage area.

[0041] The automatic shifting module includes four guide modules. Each guide module includes a push cylinder, a linear guide rail, a guide block, and a push block. The telescopic end of the push cylinder pushes the guide block to move linearly on the linear guide rail. Each guide module is located inside the frame 1 and fixed to the bottom of the worktable 2, including a first guide module, a second guide module, a third guide module, and a fourth guide module. The first and second guide modules are located on the left and right sides of the bottom of the worktable 2, respectively. The third guide module is located below the bearing pressing module 6, the front cover pressing module 7, the pulley pressing module 8, and the nut locking module 9. The fourth guide module is located below the storage area of ​​the annular track module 11. It should be noted that the worktable 2 has multiple clearance slots for the top of the push block to extend out at the corresponding positions. When the first guide module is working, the top of the push block on its guide block extends from the corresponding clearance groove and pushes the product seat 12 located below the nut locking module 9 to the left end of the storage area of ​​the annular track module 11. When the second guide module is working, the top of the push block on its guide block extends from the corresponding clearance groove and pulls the product seat 12 located at the right end of the storage area of ​​the annular track module 11 to the underside of the bearing press-fit module 6. The third guide module is provided with 3 sets of guide blocks and push blocks. When the third guide module is working, the 3 sets of guide blocks and push blocks on it cooperate with each other to push the product seat 12 located below the bearing press-fit module 6, the front cover press-fit module 7, and the pulley press-fit module 8 towards the nut locking module 9, until the left side of the bottom plate of the product seat 12 located below the pulley press-fit module 8 abuts against the left side of the outer ring track of the annular track module 11. When the fourth guide module is working, the top of the push block on its guide block extends from the corresponding clearance groove and pulls the product seat 12 located at the left end of the storage area of ​​the annular track module 11 to the right. Simultaneously, it moves the other product seats 12 located in the storage area to the right until the bottom plate of the product seat 12 located at the right end of the storage area abuts against the right side of the outer ring track of the annular track module 11. Each guide module is equipped with a stop block, and a buffer is bolted to the stop block to prevent the push block from stopping after reaching the designated position. It should be noted that when each guide module is not working, the push block on its guide block does not enter the annular track module 11; and after the guide module completes one push or pull, the guide block drives the push block back to its initial position.Additionally, it is important to note the hinged relationship between the push block and the guide block of the third guide module. When the push block of the third guide module moves the product seat 12, the top of the push block extends out of the corresponding clearance groove and enters the annular track module 11. When the guide block of the third guide module drives the push block back to the initial position, the push block collides with the bottom plate of the product seat 12 located to its right on the return path and rotates at a certain angle until the top of the push block is lower than the ground height of the bottom plate of the product seat 12. Then, the guide block continues to drive the push block, which is hinged to it, to move back to the initial position. After returning to the initial position, the top of the push block is freed from the restriction of the bottom plate of the product seat 12 and returns to a vertical position. One side of the top of the push block is flat, and the other side is curved. When pushing the product seat 12, the flat side contacts the bottom plate of the product seat 12. When returning to the initial position, the curved side slides across the ground of the bottom plate of the product seat 12.

[0042] Working Principle: The generator rotor, bearing, pulley, and nut assembly machine of this invention starts operating after a normal self-inspection. The operator first places each part of the product onto the product holder 12 at each workstation, then simultaneously presses two cooperating start buttons. The guide modules of the automatic shifting module move each product holder 12 along the circular track module 11. All modules within the five workstations automatically complete assembly simultaneously. The pressing bearing workstation and the pressing front cover workstation monitor the pressing force using pressure sensors to ensure it is within acceptable limits. The locking nut workstation checks the locking torque while locking the nut. When a cycle of assembly is completed, the operator removes the finished product and places the rotor and bearing for the next cycle onto the product holder 12 in the storage area. It should be noted that after each workstation completes its operation, if the inspection result is acceptable, the finished product is removed; if the inspection result is unacceptable, the audible and visual alarm 15 located on the machine cover 3 sounds an alarm and displays the specific alarm information on the display screen of the controller 13. Additionally, a safety light curtain 16 is installed on each side of the front end of the machine cover 3 to protect the operator's safety. An automatic locking module 18 is also provided behind the thread locking station. The automatic locking module 18 is installed on the base plate of the nut locking module 9. The automatic locking module 18 is a special module for the built-in wind turbine generator model. When working, its front end automatically radially locks into the groove on the circumferential surface of the rotor claw pole.

[0043] The generator rotor, bearing, pulley, and nut assembly machine of this invention integrates five workstations—the bearing pressing station, the front cover pressing station, the pulley pressing station, the nut tightening station, and the torque verification station—into one unit. Furthermore, through an automatic shifting module design, four sets of guide modules alternately move to achieve the cyclical movement of the product seat 12 within the circular track module 11. The assembly process is highly automated, allowing a single operator to complete all assembly work. The servo motor 17 on the nut tightening module 9 achieves a maximum tightening torque of 250 N·m, with torque error controlled within 7%. It can automatically detect misalignment and stripping and issue alarm signals. The bearing pressing module 6 uses a first cylinder and a pressure sensor to detect and control the pressing force. When it deviates from the normal value, it automatically stops pressing and issues an alarm signal. Simultaneously, it can record, query, and export assembly process data for traceability and quality statistics and analysis.

[0044] The nut tightening module 9 of this invention, in conjunction with its torque verification module 10, enables control and detection of tightening torque. The operation of each module is controlled by a controller 13 connected to the electrical control cabinet. Before use, initialization and self-testing are required. Then, the servo motor 17, controlled by a non-standard, self-designed control system built into the electrical control cabinet, tightens the nut in three stages at a set torque: The first stage is assembly, where the nut rotates at 25 r / min to align with the shaft, while the control system simultaneously detects and calculates whether the nut is misaligned; the second stage is pre-locking, where the nut is rapidly locked at 100 r / min; the third stage is tightening, where the nut is tightened to the set torque at 25 r / min, while simultaneously detecting for stripped threads. The torque sensor collects data during the tightening process and feeds back the torque in real time to the control system for PID calculation until the detected torque reaches the set value, at which point tightening is complete. The servo motor 17 can achieve a maximum tightening torque of 250 N·m, with a torque error controlled within 7%. When the nut is tightened to the correct tightness, a pass / fail message is sent; if the nut is found to be undertightened, pressing stops and an audible and visual alarm is triggered. It should be noted that misalignment and stripping are determined by monitoring and calculating torque. If misalignment occurs, servo motor 17 will stop rotating, and the pressing cylinder will not reset; if stripping occurs, servo motor 17 will continue running, and the pressing cylinder will not reset. Both of these abnormal situations will display corresponding alarm information on the controller's display screen. Additionally, the number of times the nut is repeatedly tightened, the time interval, and the monitoring of the nut sleeve's reversal after tightening can be set according to actual needs, to facilitate the separation of the nut sleeve from the nut.

[0045] The generator rotor, bearing, pulley and nut assembly machine of the present invention also has a reserved function for remote data upload. By making the corresponding program and reserving the interface in the self-designed control system in the electrical control cabinet, data can be exchanged with a remote computer in real time through the network, which can facilitate automatic remote data upload, remote monitoring and control; tightening data and bearing pressing force are automatically recorded and summarized for analysis, which can easily realize quality control.

[0046] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A generator rotor, bearing, pulley, and nut assembly machine, comprising a frame, a worktable mounted on the frame, and a cover located on the worktable, characterized in that, The workbench is equipped with four partitions, and a support plate is provided above the four partitions. The partitions are spaced apart to form a bearing pressing station, a front end cap pressing station, and a pulley pressing station. The bearing pressing station contains a bearing pressing module, the front end cap pressing station contains a front end cap pressing module, and the pulley pressing station contains a pulley pressing module. On the side of the pulley pressing station away from the front end cap pressing station, there is also a thread locking station and a torque verification station, both located in the same station. The thread locking station contains a nut locking module, and the nut locking module has a torque verification module. The workbench is also equipped with a ring track module and an automatic shifting module; the ring track module is equipped with multiple product seats, and the product seats are driven by the automatic shifting module to move along the ring track module and pass under the pressing bearing station, the pressing front cover station, the pressing pulley station and the locking thread station in sequence; The frame is equipped with an electrical control cabinet, which has a built-in control system. The machine cover is located on the workbench, and a controller is located at its front end. The controller has a display screen. The controller is connected to the electrical control cabinet, which is connected to the bearing pressing module, the front cover pressing module, the pulley pressing module, the nut locking module, the automatic shifting module, and the circular track module. The support plate is provided with 6 first flange linear bearings; the 4 partitions are divided into a first partition, a second partition, a third partition and a fourth partition; 2 first guide shafts are provided between the second partition and the first partition and the third partition, and the bottom of each first guide shaft is fixed to the worktable by a guide shaft support; The bearing press-fit module includes a first cylinder, a first pressure sensor, and a first pressure plate. The first cylinder is mounted on the support plate, with its telescopic end penetrating the support plate and facing downwards. One end of the first pressure sensor is connected to the telescopic end of the first cylinder, and the other end is fixedly connected to the upper surface of the first pressure plate. The upper surface of the first pressure plate has two second guide shafts at its front end and two second flange linear bearings at its rear end. The two second guide shafts are slidably guided by the two first flange linear bearings located at corresponding positions at the front end of the first cylinder. The two second flange linear bearings are slidably guided by the two first guide shafts located between the first partition plate and the second partition plate. A first pressure block is provided below the first pressure plate. The front cover press-fit module has the same structure as the bearing press-fit module. Each product seat base plate has a positioning groove on its rear side; the worktable is equipped with multiple positioning modules for limiting the position of the product seat; the positioning modules are divided into a first positioning module, a second positioning module, a third positioning module, a fourth positioning module, a fifth positioning module, and a sixth positioning module; the first positioning module, the second positioning module, the third positioning module, the fourth positioning module, and the fifth positioning module have the same structure, each controlled by a positioning cylinder to extend and retract a positioning tongue; the first positioning module and the second positioning module are respectively located on both sides of the annular track module; when the positioning tongues of the first positioning module and the second positioning module extend, the positioning tongues pass through the preset openings on both sides of the annular track module and enter the annular track module, and on the moving path of the product seat, respectively, they are positioned relative to the pressure plate. The bearing station and the locking thread station abut against the front side of the product seat base plate below them; the third positioning module is located between the first partition and the second partition, and the fourth positioning module is located between the second partition and the third partition; when the positioning tongues of the third positioning module and the fourth positioning module extend, they respectively enter the positioning grooves opened on the rear side of the product seat base plate below the pressing bearing station, the pressing front end cover station, and the pressing pulley station; the sixth positioning module includes a positioning cylinder, a positioning tongue, and a positioning plate located at the front end of the positioning tongue; when the positioning cylinder of the sixth positioning module controls the positioning tongue on it to extend, the front end of the positioning tongue and the positioning plate located at its front end enter the annular track module and abut against the product seat base plate located below the pressing pulley station and the locking thread station, respectively.

2. The generator rotor, bearing, pulley, and nut assembly machine according to claim 1, characterized in that, The belt pulley pressing station includes a third cylinder and a third pressure plate; the third cylinder is mounted on the support plate, with its telescopic end penetrating the support plate and facing downwards; a connecting column is provided on the upper surface of the third pressure plate, and the upper end of the connecting column is connected to the telescopic end of the third cylinder; a fourth guide shaft is provided at each end of the upper surface of the third pressure plate, and the fourth guide shaft is in sliding guide engagement with two first flange linear bearings located on both sides of the third cylinder; a third pressure block is provided below the third pressure plate.

3. The generator rotor, bearing, pulley, and nut assembly machine according to claim 1, characterized in that, The nut locking module includes a base plate, a top plate, a pressing cylinder, a fixed base, a servo motor, and a torque verification module. Four support rods are provided between the base plate and the top plate. A mounting plate is mounted on two of the support rods closest to the front end of the top plate. A fifth linear guide rail is provided on each side of the mounting plate, and a sliding block is provided on each linear guide rail for sliding guidance. Two sliding blocks are connected by a connecting rod. A fixed plate is also provided on the mounting plate, and the pressing cylinder is mounted on the fixed plate. The telescopic end of the pressing cylinder passes through the fixed plate and is connected and fixed to the middle of the connecting rod. The fixed base is located above the front end of the top plate, and the servo motor is mounted on the fixed base. The output axis of the servo motor points downwards and is connected to a reducer. The torque... The torque verification module is a torque sensor, which is installed in the fixed base. Its upper end is connected to the output shaft of the reducer, and its lower end passes through the bottom plate and the top plate of the fixed base and is connected to a telescopic universal coupling. A spring is sleeved in the middle of the telescopic universal coupling, and its bottom is connected to a guide seat through a connecting shaft. A guide bearing is provided on each side of the guide seat, and its middle part is passed through by the connecting shaft and fixedly connected to the connecting shaft. A connecting plate is provided below the guide seat, and the end of the connecting plate near the connecting rod is integrally formed with the connecting rod. A guide post is provided on each side of the connecting plate, which slides and guides the corresponding guide bearing. A nut sleeve is connected to the bottom of the connecting shaft, and the lower end of the nut sleeve passes through the connecting plate.

4. The generator rotor, bearing, pulley, and nut assembly machine according to claim 1, characterized in that, The annular track module includes a rectangular inner track and a rectangular outer track, and the distance between the inner track and the outer track is the same as the width of the product base plate.

5. The generator rotor, bearing, pulley, and nut assembly machine according to claim 1, characterized in that, The automatic shifting module includes four sets of guide modules. Each set of guide modules includes a push cylinder, a linear guide rail, a guide block, and a push block. The telescopic end of the push cylinder pushes the guide block to move linearly on the linear guide rail. The push block is located on the guide block, and its top cooperates with the product seat at the corresponding position to push the product seat at the corresponding position to move. Among them, the guide module located directly below each workstation is provided with three sets of guide blocks and push blocks, and the other three guide modules are each provided with one set of guide blocks and push blocks.

6. The generator rotor, bearing, pulley, and nut assembly machine according to claim 5, characterized in that, The workbench is provided with multiple clearance slots for the top of the push block to extend out at the corresponding position.

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