Assembling mechanism for ensuring assembling coaxiality of stator and rotor of motor and assembling method thereof

Abstract

The invention discloses an assembling mechanism for ensuring the assembling coaxiality of a stator and a rotor of a motor and an assembling method of the assembling mechanism. The assembling mechanism comprises a machine base, a rotor positioning sliding table, a stator positioning assembly, a hydraulic system, a driving press-in assembly and a PLC. The rotor positioning sliding table and the stator positioning assembly are both installed on the machine base, and the rotor positioning sliding table can do linear motion on the machine base so that the rotor positioning sliding table and the stator positioning assembly can do relative motion or back-to-back motion. The rotor positioning sliding table is used for positioning and mounting a rotor part; the stator positioning assembly is used for positioning and mounting a stator component; when the rotor positioning sliding table and the stator positioning assembly move relatively and the rotor positioning sliding table drives the rotor part to move to a set position, the rotor part and the stator part are coaxially connected; the hydraulic system and the driving press-in assembly are installed on the machine base, and the driving press-in assembly is used for driving the rotor positioning sliding table to move. The hydraulic system is used for providing power for the driving press-in assembly; the PLC is used for controlling starting and stopping of the hydraulic system. The automatic assembling machine is used for automatically assembling or assembling a rotor part and a stator part, can ensure the assembling coaxiality of the stator and the rotor of the motor, and has the characteristics of high production efficiency, safety, reliability, convenience in operation, compact structure, low manufacturing cost and streamlined operation.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic transmission and control, and in particular relates to an assembling mechanism and an assembling method for ensuring the coaxiality of the stator and rotor of a motor. Background Art

[0002] With the development of science and technology, social progress, and the vigorous promotion of clean energy, the use of large and medium-sized motors is becoming more and more extensive. Different from the design and standardized process of micro and small motors, large and medium-sized motors often need to go through complex and rigorous inspection procedures before leaving the factory to ensure product safety and reliability. The unit price of large and medium-sized motors is relatively high, and customers rarely purchase spare motors, but the safety and reliability of motors directly affect the safety and reliability of the entire production system, so customers have extremely high requirements for the comprehensive quality of large and medium-sized motors. High quality requirements and huge market have put forward higher requirements on the assembly production process of large and medium-sized motors, so the stator and rotor automatic assembly machine came into being.

[0003] At present, most rotor and stator assembly machines on the market adopt a structure in which a single arm clamps the rotor front and back and moves it into the stator. The assembly machine beam, which plays an overall supporting role, adopts a single beam structure, which has low tensile strength and is prone to elastic deformation. The suspension beam cannot freely adjust the up and down position, and the single set assembly production. The shortcomings are:

[0004] 1. The assembly machine itself is not rigid enough to meet the rigidity requirements of large-tonnage motor rotors, and its operation is unstable.

[0005] 2. The suspension beam of the assembly machine cannot be freely adjusted to control elastic deformation and make compensation adjustments. It is difficult to ensure synchronous operation. It cannot meet the needs of motors of multiple specifications and models during assembly, which easily causes wear and affects the normal use of the equipment.

[0006] 3. Rotors and stators are mostly loaded manually or with semi-automatic equipment, and cannot be produced on an assembly line, which seriously affects production efficiency.

[0007] 4. Due to the small air gap between the rotor and the stator, the assembly requires high operator skills. In addition, during the rotor installation process, the operator cannot observe the stator and rotor conditions in a digital way for real-time monitoring and detection, which can easily cause the stator and rotor phase friction to damage the insulation layer, posing a major quality risk and affecting the overall quality of the motor.

[0008] 5. Since all operations are completed manually, automated and intelligent production is impossible, which not only reduces work efficiency but also poses certain safety risks to workers. Summary of the invention

[0009] In view of this, the purpose of the present invention is to overcome the above-mentioned drawbacks of the existing large and medium-sized motor rotor stator assembly tooling, and to provide an assembly mechanism and an assembly method for ensuring the coaxiality of the motor stator and rotor assembly, which are 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 stators and rotors, and can ensure the coaxiality of the motor stator and rotor assembly, and have the characteristics of high production efficiency, safety and reliability, easy operation, compact structure, low cost, and flow operation.

[0010] The present invention is achieved through the following technical solutions:

[0011] An assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor, comprising: a machine base, a rotor positioning slide, a stator positioning assembly, a hydraulic system, a driving press-in assembly and a PLC;

[0012] The rotor positioning slide and the stator positioning assembly are both mounted on the machine base, and the rotor positioning slide can perform linear motion on the machine base, so that the rotor positioning slide and the stator positioning assembly can perform relative motion or opposite motion;

[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] Wherein, the stator positioning assembly is provided with a push rod passing through the stator component and coaxial with the stator component, and a positioning top core is provided at the end of the push rod. When the positioning top core at the end of the push rod cooperates with the central positioning hole at the end of the rotor component, it indicates that the rotor component is coaxial with the stator component; 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 driving press-in assembly are installed on the machine base, and the driving press-in assembly is used to drive the movement of the rotor positioning slide; the hydraulic system is used to provide power for the driving press-in assembly;

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

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

[0018] The slide base is fixed on the machine base, the linear guide is installed on the slide base, the slide bracket and the linear guide are slidably matched, so that the slide bracket can perform linear motion along the length direction of the linear guide; the rotor centering cylinder is installed on the slide bracket, and the axial direction of the rotor centering cylinder is parallel to the length direction of the linear guide; the inner circumferential surface of the rotor centering cylinder is provided with two O-rings, and the two O-rings are coaxial with the rotor centering cylinder;

[0019] The rotor component is coaxially installed in 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] Further, the stator positioning assembly includes: a stator bracket, a rotor centering unit, a stator centering unit and a clamping unit;

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

[0022] The stator centering unit includes: a stator mounting plate, a bearing and a positioning pin; the stator mounting plate and the bearing are both mounted on the stator bracket, the stator mounting plate is coaxial with the rotor centering cylinder and arranged oppositely; the bearing is coaxial with the stator mounting plate, and a gap is left between the outer circumference of the bearing and the inner circumference of the stator mounting plate, and the end face of the bearing protrudes from the end face of the stator mounting plate; a positioning pin hole is processed on the stator mounting plate;

[0023] The stator component is coaxially sleeved on the bearing, and the inner end surface of the stator component is butted against the end surface of the stator mounting plate, and the positioning pin hole on the stator component is opposite to the positioning pin hole on the stator mounting plate, and the two positioning pin holes opposite to each other are positioned and connected by the positioning pin to realize the positioning installation of the stator component;

[0024] The clamping unit is composed of more than two clamping oil cylinders, which are all installed on the stator bracket and evenly distributed along the circumferential direction of the stator mounting plate; when the stator component is installed on the stator mounting plate, the telescopic rods of all the clamping oil cylinders are extended and abut against the outer circumferential surface of the stator component to achieve clamping and fixing of the stator component;

[0025] The rotor centering unit comprises: a centering oil cylinder and a push rod; the centering oil cylinder and the push rod are both mounted on the stator bracket, and the centering oil cylinder and the stator mounting plate are respectively located on two opposite surfaces of the stator bracket; the axial direction of the centering oil 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 oil cylinder is located, and is connected to the telescopic rod of the centering oil cylinder through a connecting plate, and the push rod can achieve synchronous telescopic movement with the telescopic rod of the centering oil cylinder; the other end of the push rod passes through the stator bracket and is located in the bearing; the end of the push rod located in the bearing is provided with a positioning top core that can cooperate with the central positioning hole at the end of the rotor component;

[0026] When the push rod extends out of the outer end surface of the stator component under the action of the centering cylinder, and the positioning top core at the end of the push rod cooperates with the central positioning hole at the end of the rotor component, it means 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, completing the connection between the rotor component and the stator component.

[0027] Furthermore, an L-shaped clamping hook is provided on the top of the stator mounting plate; when the inner end surface of the stator component is butted against the end surface of the stator mounting plate, the clamping hook is clamped on the outer end surface of the stator component.

[0028] Further, the driving pressing assembly comprises: a pressing cylinder and a driving support;

[0029] The driving support is fixed on the machine base; the pressing cylinder is installed on the driving support, and the axial direction of the pressing cylinder is parallel to the linear guide rail of the rotor positioning slide, the telescopic rod of the pressing cylinder is connected to the slide bracket of the rotor positioning slide, and when the telescopic rod of the pressing cylinder performs telescopic movement, it can drive the slide bracket to move synchronously along the direction of the linear guide rail, that is, forward or backward movement relative to the stator positioning assembly occurs.

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

[0031] Hydraulic oil is stored in the hydraulic station. One end of the power oil pump is connected to the hydraulic station through a pipeline for pumping out the hydraulic oil in the hydraulic station. The other end of the power oil pump is connected to the pressing cylinder, the centering cylinder and the clamping cylinder through pipelines respectively, for driving the telescopic rods of the pressing cylinder, the centering cylinder and the clamping cylinder to perform telescopic movements. Actuator valve groups are respectively installed on the pipelines of the pressing cylinder, the centering cylinder and the clamping cylinder connected to the power oil pump. The flow rate and flow velocity of the hydraulic oil entering the pressing cylinder, the centering cylinder and the clamping cylinder can be adjusted by controlling the opening size of the actuator valve group, thereby adjusting the telescopic length and telescopic rate of the telescopic rods of the pressing cylinder, the centering cylinder and the clamping cylinder.

[0032] Furthermore, the PLC is used to control the opening size of the execution valve group and the rotation speed of the power oil pump according to the assembly process programming, thereby realizing the control of the telescopic length and telescopic rate of the telescopic rods of the pressing cylinder, the centering cylinder and the 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 machine base includes: a Fomag wheel, a bracket and a mounting table; the Fomag wheel is installed at the bottom of the bracket, and the mounting table is fixed to the top surface of the bracket by welding; the mounting table is welded to the bracket and then the whole is ground flat.

[0034] Furthermore, the method is implemented by using the assembly mechanism described in claim 7, and the specific steps of the method are:

[0035] The first step is to replace the rotor centering cylinder and the stator mounting plate in the assembly mechanism with rotor centering cylinders and stator mounting plates that match the models 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 components by lifting equipment and lifting tools, and position the rotor components into the rotor centering cylinder;

[0037] The third step is to hoist the stator component by hoisting equipment and hoisting tools, and make the axis of the stator component horizontal, and then position the stator component into the stator mounting plate and bearing, and finally use the positioning pin to position and lock the stator component;

[0038] Step 4: Unload the lifting equipment and lifting gear to a safe location;

[0039] Step 5: Set up a safety protection structure around the assembly mechanism and open the safety protection structure;

[0040] Step 6: Start the hydraulic system through PLC, and then control the action of the clamping cylinder to clamp the stator components;

[0041] Step 7: PLC controls the action of the pressing cylinder to drive the slide bracket carrying the rotor component to the assembly preparation position, and then controls the action of the centering cylinder through PLC to make the push rod extend from the stator component until the positioning core at the end of the push rod is pressed into the center positioning hole at the end of the rotor component;

[0042] Step 8: The PLC controls the pressing cylinder to continue to move, driving the slide bracket carrying the rotor component to move forward until the rotor component is pressed into the stator component, that is, the rotor component is coaxially installed in the bearing;

[0043] Step 9, connect the rotor component and the stator component into one by flange connection bolts;

[0044] Step 10: PLC controls the reverse action of the hydraulic cylinder to return the slide bracket to the initial position. At this time, the rotor component is completely separated from the rotor centering cylinder; the rotor component, stator component and bearing form an assembly;

[0045] The eleventh step is to manually operate the lifting equipment and the lifting fixture, and after the lifting fixture is reliably connected to the assembly, the clamping cylinder is controlled by the PLC to move in the reverse direction, the assembly is released, and the positioning pin is removed. Then, the lifting equipment and the lifting fixture are manually operated to remove the assembly from the assembly mechanism.

[0046] Beneficial effects:

[0047] (1) The present invention provides an assembly mechanism for ensuring the coaxiality of the motor stator and rotor. The hydraulic system drives the mechanical movement of the rotor positioning slide. The PLC programming controls the movement position and idle and working speeds of the rotor positioning slide. The stator positioning assembly uses a positioning core to cooperate with the central positioning hole at the end of the rotor component to ensure the coaxiality of the rotor component and the stator component, thereby achieving precise assembly of the stator and rotor, reducing bumps and scratches caused by misalignment during assembly, and improving the motor assembly quality and reliability. The use of a hydraulic system and PLC control can reduce labor intensity.

[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, and the rotor component is coaxially installed in the rotor centering cylinder. Under the action of the O-rings, a gap is left between the outer circumferential surface of the rotor component and the inner circumferential surface of the rotor centering cylinder, so that 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 facilitate subsequent coaxial positioning with the stator component.

[0049] (3) The present invention realizes the positioning and installation of the stator component by adopting the positioning pin, thereby ensuring the coaxiality of the stator component and the stator mounting plate.

[0050] (4) An L-shaped clamping hook is provided on the top of the stator mounting plate of the present invention; when the inner end surface of the stator component is butted against the end surface of the stator mounting plate, the clamping hook is pressed against the outer end surface of the stator component, thereby further locking the positioning component.

[0051] (5) The machine base of the present invention includes: a Fomag wheel, a bracket and a mounting table. The Fomag wheel can facilitate the movement of the equipment and level the equipment. The mounting table is welded to the bracket and then ground flat as a whole to ensure that the upper surface of the mounting table is level, thereby ensuring the installation accuracy of the drive press assembly, the rotor positioning slide, and the stator positioning assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 The structural composition diagram of the assembly mechanism;

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

[0054] Figure 3 This is the structural composition diagram of the rotor positioning slide;

[0055] Figure 4 This is a structural diagram of the stator positioning assembly;

[0056] Figure 5 It is a structural diagram of the drive press-in component;

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

[0058] 101. Fuma wheel, 102. bracket, 103. installation table;

[0059] 401. slide base plate, 402. linear guide rail, 403. slide bracket, 404. rotor centering cylinder;

[0060] 501. stator bracket, 502. stator mounting plate, 503. bearing, 504. positioning pin, 505. clamping hook, 506. clamping cylinder, 507. centering cylinder, 508. push rod;

[0061] 301. Press into the oil cylinder, 302. Drive support. DETAILED DESCRIPTION

[0062] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0063] Embodiment 1:

[0064] This embodiment provides a mechanism for ensuring the coaxiality of the stator and rotor of the motor. Figure 1 , including: a machine base 1, a rotor positioning slide 4, a stator positioning component 5, a hydraulic system 2, a driving press-in component 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 perform linear motion on the machine base 1, so that the rotor positioning slide 4 and the stator positioning assembly 5 can perform relative motion or opposite motion;

[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 a 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 passing through the stator component and being coaxial with the stator component. A positioning core is provided at the end of the push rod 508. When the positioning core at the end of the push rod 508 matches with the central positioning hole at the end of the rotor component, it indicates that the rotor component is coaxial with the stator component. 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 driving press-in assembly 3 are also installed on the machine base 1. The driving press-in assembly 3 is used to drive the movement of the rotor positioning slide 4. The hydraulic system 2 is used to provide power for the driving press-in assembly 3.

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

[0070] In this embodiment, see the attached Figure 2 The base 1 includes: a Foma wheel 101, a bracket 102 and a mounting table 103; the Foma wheel 101 is installed at the bottom of the bracket 102, and the mounting table 103 is fixed to the top surface of the bracket 102 by welding; the Foma wheel 101 can facilitate the movement of the equipment and level the equipment; the bracket 102 adopts a square tube with a thickness of 5 mm to ensure the stability of the equipment; the mounting table 103 adopts a 30 mm thick steel plate, which is welded to the bracket 102 and then ground flat as a whole to ensure that the upper surface of the mounting table 103 is horizontal. Since the driving press-in component 3, the rotor positioning slide 4 and the stator positioning component 5 are all installed on the mounting table 103, the installation accuracy of the driving press-in component 3, the rotor positioning slide 4 and the stator positioning component 5 is ensured.

[0071] In this embodiment, see the attached 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 table 103 of the machine base 1, the linear guide rail 402 is mounted on the slide base plate 401, and the slide bracket 403 is slidably matched with the linear guide rail 402, so that the slide bracket 403 can perform linear motion 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 the two O-rings are coaxial with the rotor centering cylinder;

[0073] The rotor component is coaxially installed in 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 the attached Figure 4 , the stator positioning assembly 5 comprises: a stator bracket 501, a rotor centering unit, a stator centering unit and a clamping unit;

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

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

[0077] The stator component is coaxially sleeved on the bearing 503, and the inner end surface of the stator component is butted against the end surface of the stator mounting plate 502, and the positioning pin 504 hole on the stator component is opposite to the positioning pin 504 hole on the stator mounting plate 502, and the two positioning pin 504 holes opposite to each other are positioned and connected by the positioning pin 504 to achieve the positioning 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 on the outer end surface of the stator component to further lock the positioning component;

[0078] The clamping unit is composed of more than two clamping cylinders 506, which are all installed on the stator bracket 501 and evenly distributed along the circumferential direction of the stator mounting plate 502; when the stator component is installed 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 comprises: a centering cylinder 507 and a push rod 508; the centering cylinder 507 and the push rod 508 are both mounted on the stator bracket 501, and the centering cylinder 507 and the stator mounting plate 502 are respectively located on two opposite surfaces of the stator bracket 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 through a connecting plate, and the push rod 508 can realize synchronous telescopic movement with the telescopic rod of the centering cylinder 507; the other end of the push rod 508 passes through the stator bracket 501 and is located in the bearing 503; the end of the push rod 508 located in the bearing 503 is provided with a positioning top core that can cooperate with the central positioning hole at the end of the rotor component;

[0080] When the push rod 508 is extended out of the outer end surface of the stator component under the action of the centering cylinder 507, and the positioning top core at the end of the push rod 508 cooperates with the central 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 exists as a damper, and 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, completing the connection between the rotor component and the stator component.

[0081] In this embodiment, the driving pressing assembly 3 and the stator positioning assembly 5 are respectively located on both sides of the rotor positioning slide 4, see the attached Figure 5 The driving pressing component 3 includes: a pressing cylinder 301 and a driving support 302; the driving support 302 is fixed on the mounting table 103 of the machine base 1; the pressing cylinder 301 is installed on the driving support 302, and the axial direction of the pressing cylinder 301 is parallel to the linear guide 402 of the rotor positioning slide 4, and 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 performs a telescopic movement, it can drive the slide bracket 403 to move synchronously along the direction of the linear guide 402, that is, it moves forward or backward relative to the stator positioning component 5; when the rotor component and the stator component are to be connected, it is necessary to push the slide bracket 403 forward in the direction of the stator positioning component 5.

[0082] In this embodiment, the hydraulic system 2 includes: an actuator valve group, a power oil pump and a hydraulic station; hydraulic oil is stored in the hydraulic station, one end of the power oil pump is connected to the hydraulic station through a pipeline, and is used to pump out the hydraulic oil in 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, respectively, and is used to drive the telescopic rods of the pressing cylinder 301, the centering cylinder 507 and the clamping cylinder 506 to perform telescopic movements; the pipelines of the pressing cylinder 301, the centering cylinder 507 and the clamping cylinder 506 connected to the power oil pump are respectively installed with actuator valve groups; by controlling the opening size of the actuator valve group, the flow rate and flow rate 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 control the opening size of the execution valve group and the rotation speed of the power oil pump according to the assembly process programming, thereby realizing the control of the telescopic length and telescopic rate of the telescopic rods of the pressing cylinder 301, the centering cylinder 507 and the 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] Embodiment 2:

[0085] Based on Example 1, this embodiment provides a method for assembling the stator and rotor of a motor using the assembling mechanism. The steps of the assembling 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 cylinder and stator mounting plate 502 that match the models 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 is to manually lift the rotor component with lifting equipment and lifting tools, position the rotor component into the rotor centering cylinder, and adjust the circumferential hole of the rotor component to the reference position;

[0088] In the third step, the stator component is manually hoisted with a hoisting device and a hoisting tool, and the axis of the stator component is horizontal, and then the stator component is positioned and installed on the stator mounting plate 502 and the bearing 503, and finally the stator component is positioned and locked with a positioning pin 504 and a clamping hook 505;

[0089] Step 4: Unload the lifting equipment and lifting gear to a safe location;

[0090] The fifth step is to set up a safety protection structure, such as a grating, around the assembly mechanism and open the safety protection structure to protect the operator;

[0091] Step 6: Start the hydraulic system 2 through the PLC, and then control the action of the clamping cylinder 506 to reliably clamp and accurately position the stator component;

[0092] Step 7: The PLC controls the action of the pressing cylinder 301 to drive the slide bracket 403 carrying the rotor component to move forward (fast forward) to the assembly preparation position, and then the PLC controls the action of the centering cylinder 507 to extend the push rod 508 from the stator component until the positioning core at the end of the push rod 508 is pressed into the central positioning hole at the end of the rotor component;

[0093] Step 8: The PLC controls the pressing cylinder 301 to continue to move, driving the slide bracket 403 carrying the rotor component to advance (slowly advance) 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, and the telescopic rod of the centering cylinder 507 can change synchronously with the length change of the push rod 508;

[0094] Step 9: manually pre-install two flange connection bolts to connect the rotor component and the stator component into one;

[0095] Step 10: PLC controls the reverse movement of the pressing cylinder 301, so that the slide bracket 403 returns to the initial position, that is, gradually moves 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 the initial position, the rotor component is completely separated from the rotor centering cylinder. At this time, the rotor component, the stator component and the bearing 503 form an assembly.

[0096] The eleventh step is to manually operate the lifting equipment and the lifting fixture, and after the lifting fixture is reliably connected to the assembly, the clamping cylinder 506 is controlled by the PLC to move in the reverse direction, the assembly is released, and the positioning pin 504 and the clamping hook 505 are removed. Then, the lifting equipment and the lifting fixture are manually operated to remove the assembly from the assembly mechanism.

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

Claims

1. A motor stator and rotor assembly mechanism for ensuring the coaxiality of the assembly, characterized in that: include: Machine base, rotor positioning slide, stator positioning assembly, hydraulic system, drive press assembly and PLC; The rotor positioning slide and the stator positioning assembly are both mounted on the machine base, and the rotor positioning slide can perform linear motion on the machine base, so that the rotor positioning slide and the stator positioning assembly can perform relative motion or opposite motion; The rotor positioning slide is used to position and install the rotor components; the stator positioning assembly is used to position and install the 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 a set position, the rotor component is coaxially connected with the stator component; Wherein, the stator positioning assembly is provided with a push rod passing through the stator component and coaxial with the stator component, and a positioning top core is provided at the end of the push rod. When the positioning top core at the end of the push rod cooperates with the central positioning hole at the end of the rotor component, it indicates that the rotor component is coaxial with the stator component; 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 driving press-in assembly are installed on the machine base, and the driving press-in assembly is used to drive the movement of the rotor positioning slide; the hydraulic system is used to provide power for the driving press-in assembly; The PLC is used to control the opening and closing of the hydraulic system.

2. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as claimed in claim 1, characterized in that: The rotor positioning slide comprises: a slide base plate, a linear guide rail, a slide bracket and a rotor centering cylinder; The slide base is fixed on the machine base, the linear guide is installed on the slide base, the slide bracket and the linear guide are slidably matched, so that the slide bracket can perform linear motion along the length direction of the linear guide; the rotor centering cylinder is installed on the slide bracket, and the axial direction of the rotor centering cylinder is parallel to the length direction of the linear guide; the inner circumferential surface of the rotor centering cylinder is provided with two O-rings, and the two O-rings are coaxial with the rotor centering cylinder; The rotor component is coaxially installed in 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 claimed in claim 2, characterized in that: The stator positioning assembly comprises: a stator bracket, a rotor centering unit, a stator centering unit and a clamping unit; The stator bracket is fixed on the machine base; The stator centering unit includes: a stator mounting plate, a bearing and a positioning pin; the stator mounting plate and the bearing are both mounted on the stator bracket, the stator mounting plate is coaxial with the rotor centering cylinder and arranged oppositely; the bearing is coaxial with the stator mounting plate, and a gap is left between the outer circumference of the bearing and the inner circumference of the stator mounting plate, and the end face of the bearing protrudes from the end face of the stator mounting plate; a positioning pin hole is processed on the stator mounting plate; The stator component is coaxially sleeved on the bearing, and the inner end surface of the stator component is butted against the end surface of the stator mounting plate, and the positioning pin hole on the stator component is opposite to the positioning pin hole on the stator mounting plate, and the two positioning pin holes opposite to each other are positioned and connected by the positioning pin to realize the positioning installation of the stator component; The clamping unit is composed of more than two clamping oil cylinders, which are all installed on the stator bracket and evenly distributed along the circumferential direction of the stator mounting plate; when the stator component is installed on the stator mounting plate, the telescopic rods of all the clamping oil cylinders are extended and abut against the outer circumferential surface of the stator component to achieve clamping and fixing of the stator component; The rotor centering unit comprises: a centering oil cylinder and a push rod; the centering oil cylinder and the push rod are both mounted on the stator bracket, and the centering oil cylinder and the stator mounting plate are respectively located on two opposite surfaces of the stator bracket; the axial direction of the centering oil 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 oil cylinder is located, and is connected to the telescopic rod of the centering oil cylinder through a connecting plate, and the push rod can achieve synchronous telescopic movement with the telescopic rod of the centering oil cylinder; the other end of the push rod passes through the stator bracket and is located in the bearing; the end of the push rod located in the bearing is provided with a positioning top core that can cooperate with the central positioning hole at the end of the rotor component; When the push rod extends out of the outer end surface of the stator component under the action of the centering cylinder, and the positioning top core at the end of the push rod cooperates with the central positioning hole at the end of the rotor component, it means 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, 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 claimed in claim 3, characterized in that: An L-shaped pressing hook is arranged on the top of the stator mounting plate; when the inner end surface of the stator component is butted against the end surface of the stator mounting plate, the pressing hook is pressed against the outer end surface of the stator component.

5. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as claimed in claim 3, characterized in that: The driving pressing assembly comprises: a pressing cylinder and a driving support; The driving support is fixed on the machine base; the pressing cylinder is installed on the driving support, and the axial direction of the pressing cylinder is parallel to the linear guide rail of the rotor positioning slide, the telescopic rod of the pressing cylinder is connected to the slide bracket of the rotor positioning slide, and when the telescopic rod of the pressing cylinder performs telescopic movement, it can drive the slide bracket to move synchronously along the direction of the linear guide rail, that is, forward or backward movement relative to the stator positioning assembly occurs.

6. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as claimed in claim 5, characterized in that: The hydraulic system includes: an actuator valve group, a power oil pump and a hydraulic station; Hydraulic oil is stored in the hydraulic station. One end of the power oil pump is connected to the hydraulic station through a pipeline for pumping out the hydraulic oil in the hydraulic station. The other end of the power oil pump is connected to the pressing cylinder, the centering cylinder and the clamping cylinder through pipelines respectively, for driving the telescopic rods of the pressing cylinder, the centering cylinder and the clamping cylinder to perform telescopic movements. Actuator valve groups are respectively installed on the pipelines of the pressing cylinder, the centering cylinder and the clamping cylinder connected to the power oil pump. The flow rate and flow velocity of the hydraulic oil entering the pressing cylinder, the centering cylinder and the clamping cylinder can be adjusted by controlling the opening size of the actuator valve group, thereby adjusting the telescopic length and telescopic rate of the telescopic rods of the pressing cylinder, the centering cylinder and the clamping cylinder.

7. The assembly mechanism for ensuring the coaxiality of the stator and rotor of a motor as claimed in claim 6, characterized in that: The PLC is used to control the opening size of the execution valve group and the rotation speed of the power oil pump according to the assembly process programming, thereby realizing the control of the telescopic length and telescopic rate of the telescopic rods of the pressing cylinder, the centering cylinder and the 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.

8. A motor stator and rotor assembly mechanism for ensuring the coaxiality of the assembly as claimed in any one of claims 1 to 7, characterized in that: The machine base comprises: a Foma wheel, a bracket and a mounting table; the Foma wheel is mounted at the bottom of the bracket, and the mounting table is fixed to the top surface of the bracket by welding; and the mounting table is overall smoothed after being welded to the bracket.

9. A method for ensuring the coaxiality of the stator and rotor of a motor, characterized in that: The method is implemented by using the assembly mechanism described in claim 7, and the specific steps of the method are: The first step is to replace the rotor centering cylinder and the stator mounting plate in the assembly mechanism with rotor centering cylinders and stator mounting plates that match the models 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 components by lifting equipment and lifting tools, and position the rotor components into the rotor centering cylinder; The third step is to hoist the stator component by hoisting equipment and hoisting tools, and make the axis of the stator component horizontal, and then position the stator component into the stator mounting plate and bearing, and finally use the positioning pin to position and lock the stator component; Step 4: Unload the lifting equipment and lifting gear to a safe location; Step 5: Set up a safety protection structure around the assembly mechanism and open the safety protection structure; Step 6: Start the hydraulic system through PLC, and then control the action of the clamping cylinder to clamp the stator components; Step 7: PLC controls the action of the pressing cylinder to drive the slide bracket carrying the rotor component to the assembly preparation position, and then controls the action of the centering cylinder through PLC to make the push rod extend from the stator component until the positioning core at the end of the push rod is pressed into the center positioning hole at the end of the rotor component; Step 8: The PLC controls the pressing cylinder to continue to move, driving the slide bracket carrying the rotor component to move forward until the rotor component is pressed into the stator component, that is, the rotor component is coaxially installed in the bearing; Step 9, connect the rotor component and the stator component into one by flange connection bolts; Step 10: PLC controls the reverse action of the hydraulic cylinder to return the slide bracket to the initial position. At this time, the rotor component is completely separated from the rotor centering cylinder; the rotor component, stator component and bearing form an assembly; The eleventh step is to manually operate the lifting equipment and the lifting fixture, and after the lifting fixture is reliably connected to the assembly, the clamping cylinder is controlled by the PLC to move in the reverse direction, the assembly is released, and the positioning pin is removed. Then, the lifting equipment and the lifting fixture are manually operated to remove the assembly from the assembly mechanism.

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