A stator-rotor assembling mechanism and a stator-rotor assembling method for ensuring coaxiality of a motor

Abstract

The application discloses a kind of guarantee motor stator and rotor assembly coaxial degree assembly mechanism and its assembly method, the assembly mechanism includes: machine base, rotor positioning sliding table, stator positioning assembly, hydraulic system, drive press-in component and PLC;Rotor positioning sliding table and stator positioning assembly are all installed on machine base, and rotor positioning sliding table can linear motion on machine base, so that rotor positioning sliding table and stator positioning assembly occur relative motion or opposite motion;Rotor positioning sliding table is used to position installation rotor component;Stator positioning assembly is used to position installation stator component;When rotor positioning sliding table and stator positioning assembly occur relative motion, and rotor positioning sliding table drives rotor component to move to set position, rotor component and stator component are coaxially connected;Hydraulic system and drive press-in component are installed on machine base, drive press-in component is used to drive the motion of rotor positioning sliding table;Hydraulic system is used to provide power for drive press-in component;PLC is used to control the opening and closing of hydraulic system.The application is used for the automatic assembly or assembly of rotor component and stator component, can guarantee motor stator and rotor assembly coaxial degree, and has the characteristics of high production efficiency, safe and reliable, easy to operate, compact structure, low cost, can flow water operation.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic transmission and control technology, specifically relating to an assembly mechanism and assembly method for ensuring the coaxiality of the stator and rotor of a motor. Background Technology

[0002] With the development of science and technology, social progress, and the vigorous promotion of clean energy, the application range of large and medium-sized motors is becoming increasingly wide. Unlike the design and standardized processes of micro and small motors, large and medium-sized motors often require complex and rigorous inspection procedures before leaving the factory to ensure product safety and reliability. Large and medium-sized motors have a higher unit price, and customers rarely purchase spare motors. However, the safety and reliability of these motors directly affect the safety and reliability of the entire production system. Therefore, customers have extremely high requirements for the overall quality of large and medium-sized motors. The demand for high quality and the huge market have placed higher demands on the assembly and production processes of large and medium-sized motors, thus leading to the development of automatic stator and rotor assembly machines.

[0003] Currently, most rotor and stator assembly machines on the market adopt a single-arm front-to-back clamping structure for assembling the rotor into the stator. The main assembly beam, which provides overall support, uses a single-beam structure, resulting in low tensile strength, susceptibility to elastic deformation, and the inability to freely adjust the vertical position of the cantilever beam. This single-set assembly production method has the following drawbacks:

[0004] 1. The rigidity of the assembly machine itself is insufficient to meet the rigidity requirements of the large-tonnage motor rotor, resulting in unstable operation.

[0005] 2. The assembly machine's suspension beam cannot be freely adjusted to control elastic deformation for compensation, making it difficult to ensure synchronized operation. During assembly, it cannot meet the needs of multiple specifications and models of motors, which can easily cause wear and affect the normal use of the equipment.

[0006] 3. Rotors and stators are mostly loaded manually or on semi-automated equipment, which makes assembly line production impossible and seriously affects production efficiency.

[0007] 4. Due to the small air gap between the rotor and stator, the assembly process requires a high level of skill from the operator. Furthermore, during the rotor assembly process, the operator cannot observe the condition of the rotor and stator in real time, which can easily cause friction between the rotor and stator to damage the insulation layer, resulting in significant quality risks and affecting the overall quality of the motor.

[0008] 5. Since all operations are performed manually during installation, automated and intelligent production is not possible, resulting in low work efficiency and potential safety hazards for workers. Summary of the Invention

[0009] In view of this, the purpose of this invention is to overcome the above-mentioned drawbacks of existing large and medium-sized motor rotor and stator assembly tooling, and to provide an assembly mechanism and method for ensuring the coaxiality of motor stator and rotor assembly, which is used for the automatic assembly or assembly of rotor components and stator components, especially for the automatic assembly or assembly of large and medium-sized stator and rotor, can ensure the coaxiality of motor stator and rotor assembly, and has the characteristics of high production efficiency, safety and reliability, convenient operation, compact structure, low cost, and assembly line operation.

[0010] This invention is achieved through the following technical solution:

[0011] An assembly mechanism that ensures the coaxiality of the stator and rotor of a motor during assembly includes: a base, a rotor positioning slide, a stator positioning assembly, a hydraulic system, a drive pressing assembly, and a PLC;

[0012] Both the rotor positioning slide and the stator positioning assembly are mounted on the machine base, and the rotor positioning slide can move linearly on the machine base, so that the rotor positioning slide and the stator positioning assembly can move relative to each other or move in opposite directions.

[0013] The rotor positioning slide is used to position and install the rotor component; the stator positioning assembly is used to position and install the stator component; when the rotor positioning slide and the stator positioning assembly move relative to each other, and the rotor positioning slide drives the rotor component to move to a set position, the rotor component and the stator component are coaxially connected.

[0014] The stator positioning assembly is provided with a push rod that passes through the stator component and is coaxial with the stator component. The end of the push rod is provided with a positioning core. When the positioning core at the end of the push rod is engaged with the center positioning hole at the end of the rotor component, it indicates that the rotor component and the stator component are coaxial. When the rotor component compresses the push rod to a set position, the rotor component can be coaxially installed in the stator component.

[0015] The hydraulic system and the drive pressing assembly are mounted on the machine base. The drive pressing assembly is used to drive the movement of the rotor positioning slide. The hydraulic system is used to provide power to the drive pressing assembly.

[0016] The PLC is used to control the opening and closing of the hydraulic system.

[0017] Furthermore, the rotor positioning slide includes: a slide base plate, a linear guide rail, a slide support, and a rotor centering cylinder;

[0018] The slide base plate is fixed on the machine base, the linear guide rail is mounted on the slide base plate, and the slide bracket is slidably engaged with the linear guide rail, so that the slide bracket can move linearly along the length direction of the linear guide rail; the rotor centering cylinder is mounted on the slide bracket, and the axial direction of the rotor centering cylinder is parallel to the length direction of the linear guide rail; the inner circumferential surface of the rotor centering cylinder is provided with two O-rings, and both O-rings are coaxial with the rotor centering cylinder;

[0019] The rotor component is coaxially mounted inside the rotor centering cylinder. Under the action of the O-ring, a gap is left between the outer circumferential surface of the rotor component and the inner circumferential surface of the rotor centering cylinder.

[0020] Furthermore, the stator positioning assembly includes: a stator support, a rotor centering unit, a stator centering unit, and a clamping unit;

[0021] The stator support is fixed on the machine base;

[0022] The stator centering unit includes: a stator mounting plate, bearings, and locating pins; both the stator mounting plate and the bearings are mounted on the stator bracket, the stator mounting plate is coaxial with the rotor centering cylinder and arranged opposite to it; the bearings are coaxial with the stator mounting plate, and there is a gap between the outer circumferential surface of the bearings and the inner circumferential surface of the stator mounting plate, the end face of the bearings protrudes from the end face of the stator mounting plate; locating pin holes are machined on the stator mounting plate;

[0023] The stator component is coaxially mounted on the bearing, and the inner end face of the stator component is in contact with the end face of the stator mounting plate, so that the positioning pin hole on the stator component is opposite to the positioning pin hole on the stator mounting plate. The two opposing positioning pin holes are connected by positioning pins to realize the positioning and installation of the stator component.

[0024] The clamping unit consists of two or more clamping cylinders, all of which are mounted on the stator support and are evenly distributed along the circumference of the stator mounting plate. When the stator component is mounted on the stator mounting plate, the telescopic rods of all the clamping cylinders extend and abut against the outer circumferential surface of the stator component to clamp and fix the stator component.

[0025] The rotor centering unit includes a centering cylinder and a push rod; both the centering cylinder and the push rod are mounted on the stator support, and the centering cylinder and the stator mounting plate are located on opposite sides of the stator support; the axial direction of the centering cylinder is parallel to the axial direction of the push rod; the push rod is coaxial with the stator mounting plate; one end of the push rod is located on the side where the centering cylinder is located, and is connected to the telescopic rod of the centering cylinder through a connecting plate, and the push rod can realize synchronous telescopic movement with the telescopic rod of the centering cylinder; the other end of the push rod passes through the stator support and is located in the bearing; the end of the push rod located in the bearing is provided with a positioning core that can cooperate with the center positioning hole at the end of the rotor component;

[0026] When the push rod extends out of the outer end face of the stator component under the action of the centering cylinder, and the positioning core at the end of the push rod matches the center positioning hole at the end of the rotor component, it indicates that the rotor component and the stator component are coaxial. The rotor component moves in the direction of the stator component, compressing the push rod until the rotor component is coaxially installed in the stator component, that is, the rotor component is coaxially installed in the bearing, thus completing the connection between the rotor component and the stator component.

[0027] Furthermore, the top of the stator mounting plate is provided with an L-shaped clamping hook; when the inner end face of the stator component is in contact with the end face of the stator mounting plate, the clamping hook is pressed against the outer end face of the stator component.

[0028] Furthermore, the drive pressing assembly includes: a pressing cylinder and a drive support;

[0029] The drive support is fixed on the machine base; the press-in cylinder is installed on the drive support, and the axis of the press-in cylinder is parallel to the linear guide rail of the rotor positioning slide. The telescopic rod of the press-in cylinder is connected to the slide bracket of the rotor positioning slide. When the telescopic rod of the press-in cylinder moves in extension and retraction, it can drive the slide bracket to move synchronously along the direction of the linear guide rail, that is, to move forward or backward relative to the stator positioning assembly.

[0030] Furthermore, the hydraulic system includes: an actuator valve assembly, a power oil pump, and a hydraulic power unit;

[0031] The hydraulic station stores hydraulic oil. One end of the power oil pump is connected to the hydraulic station via a pipeline to pump out the hydraulic oil. The other end of the power oil pump is connected to the pressing cylinder, centering cylinder, and clamping cylinder via pipelines to drive the telescopic rods of the pressing cylinder, centering cylinder, and clamping cylinder to extend and retract. Actuation valve assemblies are installed on the pipelines connecting the pressing cylinder, centering cylinder, and clamping cylinder to the power oil pump. By controlling the opening size of the actuation valve assemblies, the flow rate and velocity of the hydraulic oil entering the pressing cylinder, centering cylinder, and clamping cylinder can be adjusted, thereby adjusting the extension length and extension rate of the telescopic rods of the pressing cylinder, centering cylinder, and clamping cylinder.

[0032] Furthermore, the PLC is used to programmatically control the opening size of the actuator valve group and control the rotation speed of the power oil pump according to the assembly process, thereby realizing the control of the extension length and extension rate of the extension rods of the pressing cylinder, centering cylinder and clamping cylinder, and finally realizing the motion control of the slide bracket, the motion control of the push rod and the clamping control of the stator component.

[0033] Furthermore, the base includes: a fuma wheel, a bracket, and a mounting platform; the fuma wheel is installed at the bottom of the bracket, and the mounting platform is fixed to the top surface of the bracket by welding; the mounting platform is ground flat after being welded to the bracket.

[0034] This invention also provides an assembly method to ensure the coaxiality of the stator and rotor of a motor during assembly. The specific steps of this method are as follows:

[0035] The first step is to replace the rotor centering cylinder and stator mounting plate in the assembly mechanism with rotor centering cylinders and stator mounting plates that match the model of the rotor and stator components to be assembled, according to the rotor and stator components to be assembled.

[0036] The second step is to lift the rotor assembly using hoisting equipment and lifting tools, and then position and install the rotor assembly into the rotor centering cylinder.

[0037] The third step is to lift the stator component using hoisting equipment and lifting tools, and make the axis of the stator component horizontal. Then, position the stator component and install it on the stator mounting plate and bearing. Finally, use positioning pins to lock the stator component in place.

[0038] The fourth step is to unload the hoisting equipment and lifting tools to a safe location;

[0039] Fifth, install a safety protection structure around the assembly mechanism and activate the safety protection structure;

[0040] The sixth step is to start the hydraulic system via PLC, thereby controlling the action of the clamping cylinder to clamp the stator component;

[0041] Step 7: The PLC controls the pressing cylinder to drive the slide bracket carrying the rotor component to the assembly preparation position. Then, the PLC controls the centering cylinder to extend the push rod from the stator component until the positioning core at the end of the push rod abuts into the center positioning hole at the end of the rotor component.

[0042] The eighth step involves using PLC to control the pressing cylinder to continue its operation, driving the slide support carrying the rotor components to advance until the rotor components are pressed into the stator components, i.e., the rotor components are coaxially installed in the bearings.

[0043] The ninth step is to connect the rotor assembly and the stator assembly into one unit using flange connection bolts;

[0044] Step 10: The PLC controls the hydraulic cylinder to reverse its movement, causing the slide support to return to its initial position. At this point, the rotor assembly is completely separated from the rotor centering cylinder; the rotor assembly, stator assembly, and bearings form the assembly.

[0045] Step 11: Manually operate the hoisting equipment and lifting tools to reliably connect the lifting tools to the assembly. Then, control the clamping cylinder to reverse its movement via PLC to release the assembly and remove the locating pin. After that, manually continue to operate the hoisting equipment and lifting tools to remove the assembly from the assembly mechanism.

[0046] Beneficial effects:

[0047] (1) The assembly mechanism of the present invention for ensuring the coaxiality of the stator and rotor of the motor is driven by the mechanical movement of the rotor positioning slide through the hydraulic system. The movement position and the speed of the idle feed and working feed of the rotor positioning slide are controlled by PLC programming. The stator positioning component uses the positioning top core to cooperate with the center positioning hole at the end of the rotor component to ensure the coaxiality of the rotor component and the stator component, realize the precise assembly of the stator and rotor, reduce the collision and scratching caused by different shafts during the assembly process, improve the assembly quality and reliability of the motor, and reduce the labor intensity by using the hydraulic system and PLC control.

[0048] (2) The inner circumferential surface of the rotor centering cylinder of the rotor positioning slide of the present invention is provided with two O-rings. The rotor component is coaxially installed in the rotor centering cylinder. Under the action of the O-rings, the outer circumferential surface of the rotor component and the inner circumferential surface of the rotor centering cylinder are left with a gap. When the rotor component moves axially relative to the rotor centering cylinder, the outer circumferential surface of the rotor component is protected from wear. In addition, under the action of the O-rings, the axis of the rotor component can float slightly so as to be coaxially positioned with the stator component in the future.

[0049] (3) The present invention uses positioning pins to achieve the positioning and installation of stator components, thereby ensuring the coaxiality of stator components and stator mounting plate.

[0050] (4) The top of the stator mounting plate of the present invention is provided with an L-shaped clamping hook; when the inner end face of the stator component is in contact with the end face of the stator mounting plate, the clamping hook is pressed against the outer end face of the stator component, thereby further locking the positioning component.

[0051] (5) The base of the present invention includes: a fuma wheel, a bracket and a mounting platform. The fuma wheel can facilitate the movement of the equipment and can also be used for equipment leveling. The mounting platform is welded to the bracket and then ground flat to ensure that the upper surface of the mounting platform is level, thereby ensuring the installation accuracy of the drive pressing component, the rotor positioning slide and the stator positioning component. Attached Figure Description

[0052] Figure 1 This is a structural diagram of the assembly mechanism;

[0053] Figure 2 This is a structural diagram of the machine base;

[0054] Figure 3 A structural diagram of the rotor positioning slide;

[0055] Figure 4 A structural diagram of the stator positioning assembly;

[0056] Figure 5 A structural diagram of the drive press-fit component;

[0057] Among them, 1. base, 2. hydraulic system, 3. drive pressing assembly, 4. rotor positioning slide, 5. stator positioning assembly;

[0058] 101. Casters; 102. Bracket; 103. Mounting platform;

[0059] 401. Slide table base plate; 402. Linear guide rail; 403. Slide table support; 404. Rotor centering cylinder;

[0060] 501. Stator bracket; 502. Stator mounting plate; 503. Bearing; 504. Locating pin; 505. Clamping hook; 506. Clamping cylinder; 507. Centering cylinder; 508. Push rod;

[0061] 301. Press-in cylinder; 302. Drive support. Detailed Implementation

[0062] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0063] Example 1:

[0064] This embodiment provides an assembly mechanism that ensures the coaxiality of the stator and rotor of a motor during assembly. See attached diagram. Figure 1 It includes: a base 1, a rotor positioning slide 4, a stator positioning assembly 5, a hydraulic system 2, a drive pressing assembly 3, and a PLC;

[0065] The rotor positioning slide 4 and the stator positioning assembly 5 are both mounted on the machine base 1, and the rotor positioning slide 4 can move linearly on the machine base 1, so that the rotor positioning slide 4 and the stator positioning assembly 5 can move relative to each other or move in opposite directions.

[0066] The rotor positioning slide 4 is used to position and install the rotor component; the stator positioning assembly 5 is used to position and install the stator component; when the rotor positioning slide 4 and the stator positioning assembly 5 move relative to each other, and the rotor positioning slide 4 drives the rotor component to move to the set position, the rotor component and the stator component are coaxially connected.

[0067] The stator positioning assembly 5 is provided with a push rod 508 that passes through the stator component and is coaxial with the stator component. The end of the push rod 508 is provided with a positioning top core. When the positioning top core at the end of the push rod 508 is engaged with the center positioning hole at the end of the rotor component, it indicates that the rotor component and the stator component are coaxial. When the rotor component compresses the push rod 508 to a set position, the rotor component can be coaxially installed in the stator component.

[0068] The hydraulic system 2 and the drive pressing assembly 3 are also mounted on the base 1. The drive pressing assembly 3 is used to drive the movement of the rotor positioning slide 4. The hydraulic system 2 is used to provide power to the drive pressing assembly 3.

[0069] The PLC is used to control the opening and closing of the hydraulic system 2.

[0070] In this embodiment, see Appendix Figure 2 The base 1 includes: a fuma wheel 101, a bracket 102, and a mounting platform 103; the fuma wheel 101 is installed at the bottom of the bracket 102, and the mounting platform 103 is fixed to the top surface of the bracket 102 by welding; the fuma wheel 101 can facilitate equipment movement and leveling; the bracket 102 is made of a 5mm thick square tube to ensure equipment stability; the mounting platform 103 is made of a 30mm thick steel plate, which is welded to the bracket 102 and then ground flat to ensure that the upper surface of the mounting platform 103 is level. Since the drive pressing component 3, the rotor positioning slide 4, and the stator positioning component 5 are all installed on the mounting platform 103, the installation accuracy of the drive pressing component 3, the rotor positioning slide 4, and the stator positioning component 5 is ensured.

[0071] In this embodiment, see Appendix Figure 3 The rotor positioning slide 4 includes: a slide base plate 401, a linear guide rail 402, a slide bracket 403, and a rotor centering cylinder.

[0072] The slide base plate 401 is fixed on the mounting surface 103 of the machine base 1. The linear guide rail 402 is mounted on the slide base plate 401. The slide bracket 403 is slidably engaged with the linear guide rail 402, so that the slide bracket 403 can move linearly along the length direction of the linear guide rail 402. The rotor centering cylinder is mounted on the slide bracket 403, and the axial direction of the rotor centering cylinder is parallel to the length direction of the linear guide rail 402. The inner circumferential surface of the rotor centering cylinder is provided with two O-rings, and both O-rings are coaxial with the rotor centering cylinder.

[0073] The rotor component is coaxially mounted inside the rotor centering cylinder. Under the action of the O-ring, a gap is left between the outer circumferential surface of the rotor component and the inner circumferential surface of the rotor centering cylinder. When the rotor component moves axially relative to the rotor centering cylinder, the outer circumferential surface of the rotor component is protected from wear. In addition, under the action of the O-ring, the axis of the rotor component can float slightly, so as to facilitate subsequent coaxial positioning with the stator component.

[0074] In this embodiment, see Appendix Figure 4 The stator positioning assembly 5 includes: a stator support 501, a rotor centering unit, a stator centering unit, and a clamping unit;

[0075] The stator bracket 501 is fixed on the mounting platform 103 of the base 1;

[0076] The stator centering unit includes: a stator mounting plate 502, a bearing 503, a locating pin 504, and a clamping hook 505; both the stator mounting plate 502 and the bearing 503 are mounted on the stator bracket 501. The stator mounting plate 502 is coaxial with the rotor centering cylinder and arranged opposite to it; the bearing 503 is coaxial with the stator mounting plate 502, and there is a gap between the outer circumferential surface of the bearing 503 and the inner circumferential surface of the stator mounting plate 502. The end face of the bearing 503 protrudes from the end face of the stator mounting plate 502; an L-shaped clamping hook 505 is provided on the top of the stator mounting plate 502; the stator mounting plate 502 has a hole for the locating pin 504.

[0077] The stator component is coaxially mounted on the bearing 503, and the inner end face of the stator component is in contact with the end face of the stator mounting plate 502, so that the positioning pin 504 hole on the stator component is aligned with the positioning pin 504 hole on the stator mounting plate 502. The two aligning positioning pin 504 holes are connected by positioning pin 504 to realize the positioning and installation of the stator component and ensure the coaxiality of the stator component and the stator mounting plate 502. At the same time, the clamping hook 505 is pressed against the outer end face of the stator component to further lock the positioning component.

[0078] The clamping unit consists of two or more clamping cylinders 506, which are all mounted on the stator bracket 501 and evenly distributed along the circumference of the stator mounting plate 502. When the stator component is mounted on the stator mounting plate 502, the telescopic rods of all the clamping cylinders 506 extend and abut against the outer circumferential surface of the stator component to achieve clamping and fixing of the stator component.

[0079] The rotor centering unit includes a centering cylinder 507 and a push rod 508. Both the centering cylinder 507 and the push rod 508 are mounted on the stator support 501, with the centering cylinder 507 and the stator mounting plate 502 located on opposite sides of the stator support 501. The axial direction of the centering cylinder 507 is parallel to the axial direction of the push rod 508. The push rod 508 is coaxial with the stator mounting plate 502. One end of the push rod 508 is located on the side where the centering cylinder 507 is located and is connected to the telescopic rod of the centering cylinder 507 via a connecting plate. The push rod 508 can achieve synchronous telescopic movement with the telescopic rod of the centering cylinder 507. The other end of the push rod 508 passes through the stator support 501 and is located within a bearing 503. The end of the push rod 508 located within the bearing 503 is provided with a positioning core that can mate with the central positioning hole at the end of the rotor component.

[0080] When the push rod 508 extends out of the outer end face of the stator component under the action of the centering cylinder 507, and the positioning core at the end of the push rod 508 mates with the center positioning hole at the end of the rotor component, it indicates that the rotor component and the stator component are coaxial. The rotor component moves in the direction of the stator component, compressing the push rod 508. At this time, the centering cylinder 507 acts as a damper. The telescopic rod of the centering cylinder 507 can change synchronously with the length change of the push rod 508 until the rotor component is coaxially installed in the stator component, that is, the rotor component is coaxially installed in the bearing 503, thus completing the connection between the rotor component and the stator component.

[0081] In this embodiment, the drive pressing assembly 3 and the stator positioning assembly 5 are located on both sides of the rotor positioning slide 4, respectively. See Appendix Figure 5 The drive pressing assembly 3 includes a pressing cylinder 301 and a drive support 302. The drive support 302 is fixed on the mounting surface 103 of the base 1. The pressing cylinder 301 is mounted on the drive support 302, and the axial direction of the pressing cylinder 301 is parallel to the linear guide rail 402 of the rotor positioning slide 4. The telescopic rod of the pressing cylinder 301 is connected to the slide bracket 403 of the rotor positioning slide 4. When the telescopic rod of the pressing cylinder 301 moves forward and backward, it can drive the slide bracket 403 to move synchronously along the direction of the linear guide rail 402, that is, to move forward or backward relative to the stator positioning assembly 5. When the rotor component and the stator component are to be connected, the slide bracket 403 needs to be pushed forward in the direction of the stator positioning assembly 5.

[0082] In this embodiment, the hydraulic system 2 includes: an actuator valve group, a power oil pump, and a hydraulic station; the hydraulic station stores hydraulic oil, one end of the power oil pump is connected to the hydraulic station through a pipeline to pump out the hydraulic oil from the hydraulic station, and the other end of the power oil pump is connected to the pressing cylinder 301, the centering cylinder 507, and the clamping cylinder 506 through pipelines to drive the telescopic rods of the pressing cylinder 301, the centering cylinder 507, and the clamping cylinder 506 to perform telescopic movements; actuator valve groups are respectively installed on the pipelines of the pressing cylinder 301, the centering cylinder 507, and the clamping cylinder 506 connected to the power oil pump; by controlling the opening size of the actuator valve group, the flow rate and velocity of the hydraulic oil entering the pressing cylinder 301, the centering cylinder 507, and the clamping cylinder 506 can be adjusted, thereby adjusting the telescopic length and telescopic rate of the telescopic rods of the pressing cylinder 301, the centering cylinder 507, and the clamping cylinder 506.

[0083] In this embodiment, the PLC is used to programmatically control the opening size of the actuator valve group and control the rotation speed of the power oil pump according to the assembly process, thereby realizing the control of the extension length and extension rate of the extension rods of the pressing cylinder 301, centering cylinder 507 and clamping cylinder 506, and finally realizing the motion control of the slide bracket 403, the motion control of the push rod 508 and the clamping control of the stator component.

[0084] Example 2:

[0085] Based on Embodiment 1, this embodiment provides a method for assembling the stator and rotor of a motor using the aforementioned assembly mechanism. The steps of this assembly method are as follows:

[0086] The first step is to replace the rotor centering cylinder and stator mounting plate 502 in the assembly mechanism with rotor centering cylinders and stator mounting plates 502 that match the model of the rotor and stator components to be assembled, thereby completing the replacement and adjustment of the rotor centering cylinder and stator mounting plate 502.

[0087] The second step involves manually lifting the rotor assembly using hoisting equipment and lifting tools, positioning the rotor assembly inside the rotor centering cylinder, and adjusting the circumferential hole of the rotor assembly to the reference position.

[0088] The third step involves manually lifting the stator component using hoisting equipment and lifting tools, ensuring the axis of the stator component is horizontal, then positioning and installing the stator component onto the stator mounting plate 502 and bearing 503, and finally locking the stator component in place using positioning pins 504 and clamping hooks 505.

[0089] The fourth step is to unload the hoisting equipment and lifting tools to a safe location;

[0090] The fifth step is to install a safety protection structure, such as a light grid, around the assembly mechanism and activate the safety protection structure to protect the operators.

[0091] The sixth step is to start the hydraulic system 2 via PLC, thereby controlling the action of the clamping cylinder 506 to reliably clamp and accurately position the stator component;

[0092] Step 7: The PLC controls the pressing cylinder 301 to move, driving the slide bracket 403 carrying the rotor component to advance (rapid advance) to the assembly preparation position. Then, the PLC controls the centering cylinder 507 to move, causing the push rod 508 to extend from the stator component until the positioning core at the end of the push rod 508 abuts into the center positioning hole at the end of the rotor component.

[0093] In the eighth step, the PLC controls the pressing cylinder 301 to continue operating, driving the slide support 403 carrying the rotor component to feed (slowly) until the rotor component is pressed into the stator component, that is, the rotor component is coaxially installed in the bearing 503; during this process, the push rod 508 is compressed, and the centering cylinder 507 exists as a damper. The extension rod of the centering cylinder 507 can change synchronously with the length change of the push rod 508.

[0094] The ninth step involves manually installing two flange connection bolts to connect the rotor and stator components into one unit.

[0095] Step 10: The PLC controls the hydraulic cylinder 301 to reverse its movement, causing the slide bracket 403 to return to its initial position, that is, to gradually move away from the stator positioning assembly 5. During the movement of the slide bracket 403, the rotor component gradually separates from the rotor centering cylinder. When the slide bracket 403 returns to its initial position, the rotor component and the rotor centering cylinder are completely separated. At this time, the rotor component, the stator component, and the bearing 503 form an assembly.

[0096] Step 11: Manually operate the hoisting equipment and lifting tools to reliably connect the lifting tools to the assembly. Then, control the clamping cylinder 506 to reverse its movement via PLC to release the assembly. After removing the positioning pin 504 and the clamping hook 505, manually continue operating the hoisting equipment and lifting tools to remove the assembly from the assembly mechanism.

[0097] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor during assembly, characterized in that, include: Machine base, rotor positioning slide, stator positioning assembly, hydraulic system, drive pressing assembly and PLC; Both the rotor positioning slide and the stator positioning assembly are mounted on the machine base, and the rotor positioning slide can move linearly on the machine base, so that the rotor positioning slide and the stator positioning assembly can move relative to each other or move in opposite directions. The rotor positioning slide is used for positioning and installing rotor components; the stator positioning assembly is used for positioning and installing stator components. When the rotor positioning slide and the stator positioning assembly move relative to each other, and the rotor positioning slide drives the rotor component to move to the set position, the rotor component and the stator component are coaxially connected. The stator positioning assembly is provided with a push rod that passes through the stator component and is coaxial with the stator component. The end of the push rod is provided with a positioning core. When the positioning core at the end of the push rod is engaged with the center positioning hole at the end of the rotor component, it indicates that the rotor component and the stator component are coaxial. When the rotor component compresses the push rod to a set position, the rotor component can be coaxially installed in the stator component. The hydraulic system and the drive pressing assembly are mounted on the machine base. The drive pressing assembly is used to drive the movement of the rotor positioning slide. The hydraulic system is used to provide power to the drive pressing assembly. The PLC is used to control the opening and closing of the hydraulic system. The rotor positioning slide includes: a slide base plate, a linear guide rail, a slide support, and a rotor centering cylinder; The slide base plate is fixed on the machine base, the linear guide rail is mounted on the slide base plate, and the slide bracket is slidably engaged with the linear guide rail, so that the slide bracket can move linearly along the length direction of the linear guide rail; the rotor centering cylinder is mounted on the slide bracket, and the axial direction of the rotor centering cylinder is parallel to the length direction of the linear guide rail; the inner circumferential surface of the rotor centering cylinder is provided with two O-rings, and both O-rings are coaxial with the rotor centering cylinder; The stator positioning assembly includes: a stator support, a rotor centering unit, a stator centering unit, and a clamping unit; The stator support is fixed on the machine base; The stator centering unit includes: a stator mounting plate, bearings, and locating pins; both the stator mounting plate and the bearings are mounted on the stator bracket, the stator mounting plate is coaxial with the rotor centering cylinder and arranged opposite to it; the bearings are coaxial with the stator mounting plate, and there is a gap between the outer circumferential surface of the bearings and the inner circumferential surface of the stator mounting plate, the end face of the bearings protrudes from the end face of the stator mounting plate; locating pin holes are machined on the stator mounting plate; The clamping unit consists of two or more clamping cylinders, all of which are mounted on the stator support and are evenly distributed along the circumference of the stator mounting plate. The rotor centering unit includes a centering cylinder and a push rod; both the centering cylinder and the push rod are mounted on the stator support, and the centering cylinder and the stator mounting plate are located on opposite sides of the stator support; the axial direction of the centering cylinder is parallel to the axial direction of the push rod; the push rod is coaxial with the stator mounting plate; one end of the push rod is located on the side where the centering cylinder is located, and is connected to the telescopic rod of the centering cylinder through a connecting plate, so that the push rod can realize synchronous telescopic movement with the telescopic rod of the centering cylinder; the other end of the push rod passes through the stator support and is located in the bearing; the end of the push rod located in the bearing is provided with a positioning core that can cooperate with the center positioning hole at the end of the rotor component.

2. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in claim 1, characterized in that, The rotor component is coaxially mounted inside the rotor centering cylinder. Under the action of the O-ring, a gap is left between the outer circumferential surface of the rotor component and the inner circumferential surface of the rotor centering cylinder.

3. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in claim 2, characterized in that, The stator component is coaxially mounted on the bearing, and the inner end face of the stator component is in contact with the end face of the stator mounting plate, so that the positioning pin hole on the stator component is opposite to the positioning pin hole on the stator mounting plate. The two opposing positioning pin holes are connected by positioning pins to realize the positioning and installation of the stator component. When the stator component is installed on the stator mounting plate, the telescopic rods of all the clamping cylinders extend and abut against the outer circumferential surface of the stator component to clamp and fix the stator component. When the push rod extends out of the outer end face of the stator component under the action of the centering cylinder, and the positioning core at the end of the push rod matches the center positioning hole at the end of the rotor component, it indicates that the rotor component and the stator component are coaxial. The rotor component moves toward the stator component, compressing the push rod until the rotor component is coaxially mounted inside the stator component, that is, the rotor component is coaxially mounted inside the bearing, thus completing the connection between the rotor component and the stator component.

4. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in claim 3, characterized in that, The top of the stator mounting plate is provided with an L-shaped clamping hook; when the inner end face of the stator component is in contact with the end face of the stator mounting plate, the clamping hook is pressed against the outer end face of the stator component.

5. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in claim 3, characterized in that, The drive pressing assembly includes: a pressing cylinder and a drive support; The drive support is fixed on the machine base; the press-in cylinder is installed on the drive support, and the axis of the press-in cylinder is parallel to the linear guide rail of the rotor positioning slide. The telescopic rod of the press-in cylinder is connected to the slide bracket of the rotor positioning slide. When the telescopic rod of the press-in cylinder moves in extension and retraction, it can drive the slide bracket to move synchronously along the direction of the linear guide rail, that is, to move forward or backward relative to the stator positioning assembly.

6. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in claim 5, characterized in that, The hydraulic system includes: an actuator valve group, a power oil pump, and a hydraulic power unit; The hydraulic station stores hydraulic oil. One end of the power oil pump is connected to the hydraulic station via a pipeline to pump out the hydraulic oil. The other end of the power oil pump is connected to the pressing cylinder, centering cylinder, and clamping cylinder via pipelines to drive the telescopic rods of the pressing cylinder, centering cylinder, and clamping cylinder to extend and retract. Actuation valve assemblies are installed on the pipelines connecting the pressing cylinder, centering cylinder, and clamping cylinder to the power oil pump. By controlling the opening size of the actuation valve assemblies, the flow rate and velocity of the hydraulic oil entering the pressing cylinder, centering cylinder, and clamping cylinder can be adjusted, thereby adjusting the extension length and extension rate of the telescopic rods of the pressing cylinder, centering cylinder, and clamping cylinder.

7. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in claim 6, characterized in that, The PLC is used to programmatically control the opening size of the actuator valve group and control the speed of the power oil pump according to the assembly process, thereby realizing the control of the extension length and extension rate of the extension rods of the pressing cylinder, centering cylinder and clamping cylinder, and finally realizing the motion control of the slide support, the motion control of the push rod and the clamping control of the stator component.

8. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as described in any one of claims 1-7, characterized in that, The base includes: a fuma wheel, a bracket, and a mounting platform; the fuma wheel is installed at the bottom of the bracket, and the mounting platform is fixed to the top surface of the bracket by welding; the mounting platform is ground flat after being welded to the bracket.

9. An assembly method for ensuring the coaxiality of the stator and rotor of a motor, characterized in that, This method is implemented using the assembly mechanism described in claim 7, and the specific steps of this method are as follows: The first step is to replace the rotor centering cylinder and stator mounting plate in the assembly mechanism with rotor centering cylinders and stator mounting plates that match the model of the rotor and stator components to be assembled, according to the rotor and stator components to be assembled. The second step is to lift the rotor assembly using hoisting equipment and lifting tools, and then position and install the rotor assembly into the rotor centering cylinder. The third step is to lift the stator component using hoisting equipment and lifting tools, and make the axis of the stator component horizontal. Then, position the stator component and install it on the stator mounting plate and bearing. Finally, use positioning pins to lock the stator component in place. The fourth step is to unload the hoisting equipment and lifting tools to a safe location; Fifth, install a safety protection structure around the assembly mechanism and activate the safety protection structure; The sixth step is to start the hydraulic system via PLC, thereby controlling the action of the clamping cylinder to clamp the stator component; Step 7: The PLC controls the pressing cylinder to drive the slide bracket carrying the rotor component to the assembly preparation position. Then, the PLC controls the centering cylinder to extend the push rod from the stator component until the positioning core at the end of the push rod abuts into the center positioning hole at the end of the rotor component. The eighth step involves using PLC to control the pressing cylinder to continue its operation, driving the slide support carrying the rotor components to advance until the rotor components are pressed into the stator components, i.e., the rotor components are coaxially installed in the bearings. The ninth step is to connect the rotor assembly and the stator assembly into one unit using flange connection bolts; Step 10: The PLC controls the hydraulic cylinder to reverse its movement, causing the slide support to return to its initial position. At this point, the rotor assembly is completely separated from the rotor centering cylinder; the rotor assembly, stator assembly, and bearings form the assembly. Step 11: Manually operate the hoisting equipment and lifting tools to reliably connect the lifting tools to the assembly. Then, control the clamping cylinder to reverse its movement via PLC to release the assembly and remove the locating pin. After that, manually continue to operate the hoisting equipment and lifting tools to remove the assembly from the assembly mechanism.

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