Rotor structure of high-speed permanent magnet motor, assembling equipment and assembling method thereof

Abstract

The invention relates to the related technical field of permanent magnet motors, in particular to a rotor structure of a high-speed permanent magnet motor, assembling equipment and an assembling method of the high-speed permanent magnet motor. The rotor structure of the high-speed permanent magnet motor comprises a rotor iron core and a rotating shaft fixed to the rotor iron core through an insertion hole in the rotor iron core; a plurality of mounting grooves for embedding permanent magnets are formed in the rotor core at equal intervals along the circumference, a plurality of cylindrical cavities communicated with the insertion holes are formed in the rotor core at equal intervals along the circumference, and each cylindrical cavity is communicated with an assembly cavity; the innovation of the invention lies in that the mechanical fixing mode is automatically realized in the process of assembling the rotating shaft, and an independent assembling step does not need to be additionally added; according to the design, the assembly process is simplified, the production efficiency is effectively improved, the stability and reliability of the permanent magnet in high-speed rotation and high-vibration environments are ensured, the overall performance of the motor is remarkably improved, and the service life of the motor is remarkably prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and in particular to a rotor structure, an assembly device and an assembly method of a high-speed permanent magnet motor. Background Art

[0002] A permanent magnet motor is a synchronous motor that uses permanent magnets to establish a magnetic field, and has the advantages of high efficiency and high power density. Since the permanent magnet motor has low excitation loss and remarkable energy-saving effect, it is widely used in fields such as electric vehicles for mobile energy storage. Its rotor structure usually consists of parts such as permanent magnets, a rotating shaft and a rotor core. According to different application requirements, there are various types of rotor structures for permanent magnet motors, such as surface-mounted type, built-in type and claw-pole type, etc. Among them, the built-in structure can improve the demagnetization resistance ability, and is more commonly used especially in the field of electric vehicles.

[0003] In the manufacturing of motors, permanent magnets are usually fixed in the installation grooves of the rotor core by adhesives. The durability of adhesives has limitations in the complex environment of actual motor operation. The high-speed rotation or high vibration during motor operation has extremely high requirements for the fixing method of permanent magnets. Under long-term operation, the performance of adhesives will gradually decline, showing aging and failure, especially in high-temperature or humid environments, resulting in unstable fixing of permanent magnets. In addition, the moisture or corrosive substances in the motor cavity will erode the adhesives, destroying their bonding performance, affecting the working performance of the motor, and even causing motor failures, shortening the service life and reducing the working efficiency. Based on the above problems, the industry has tried to use mechanical fixing methods to fix permanent magnets, which to a certain extent makes up for the deficiencies of the adhesive fixing method and provides a more reliable fixing effect.

[0004] However, in a high-speed rotation or high-vibration environment, mechanical fixing alone may not be able to provide sufficient fixing force, resulting in loosening or falling off of permanent magnets, bringing potential risks to the stable operation of the motor. In response to this, some rotor structures have begun to explore a combination of adhesives and mechanical fixing methods for the assembly of permanent magnets, in order to achieve a more ideal fixing effect and ensure that the permanent magnets have sufficient stability; because the adhesive fixing force of adhesives has a certain elastic allowance, allowing the fixed parts to fluctuate within a small range; while mechanical fixing has the characteristics of rigid connection, and the combination of the two enables the motor rotor to ensure a small-amplitude flexible adhesive fixing force and will not have obvious mechanical detachment. However, in the specific implementation process, this combined fixing method usually needs to be carried out in two steps, which undoubtedly complicates the assembly process of permanent magnets. The increase in assembly steps not only prolongs the production cycle, but also may lead to a decrease in assembly efficiency, thereby affecting the efficiency and production capacity of the entire motor production process. Summary of the Invention

[0005] The object of the present invention is to provide a rotor structure, an assembly device and an assembly method for a high-speed permanent magnet motor, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A rotor structure of a high-speed permanent magnet motor, including a rotor core and a rotating shaft fixed to the rotor core through a jack on the rotor core, and a plurality of mounting grooves for embedding permanent magnets are equidistantly arranged along the circumference on the rotor core, and a plurality of cylindrical cavities communicating with the jack are equidistantly arranged along the circumference inside the rotor core, and each of the cylindrical cavities communicates with an assembly cavity; An elastic boosting mechanism is arranged in the cylindrical cavity, and the elastic boosting mechanism is connected with a fastening mechanism arranged in the assembly cavity. When the rotating shaft enters the jack, it can cause the fastening mechanism to drive the elastic boosting mechanism to move towards the mounting groove.

[0007] As a further scheme of the present invention: The elastic boosting mechanism includes a frustum sliding in the cylindrical cavity and a transmission shaft fixed to the frustum. One end of the transmission shaft extends into the assembly cavity and is connected to the fastening mechanism, and the other end is fixedly provided with a driven block, and an inclined surface is arranged on the side of the driven block away from the transmission shaft; Wherein, a first spring sleeved on the outer periphery of the transmission shaft is further arranged in the cylindrical cavity, and two ends of the first spring are respectively connected to the inside of the cylindrical cavity and the frustum.

[0008] As a further scheme of the present invention: The fastening mechanism includes a follower plate movably arranged in the assembly cavity, a plurality of rubber columns are arranged on the follower plate, and the follower plate can move radially along the rotor core so that the plurality of rubber columns enter the mounting groove; Wherein, a guide rail is arranged inside the assembly cavity, a movable seat is slidably fitted on the guide rail, one end of the transmission shaft away from the driven block is connected to the movable seat through a connecting rod, and two ends of the connecting rod are respectively hinged to the transmission shaft and the movable seat; A driving column is arranged on the movable seat, two transmission blocks are further arranged on the side of the follower plate facing the guide rail, a through groove adapted to the driving column is obliquely arranged on the transmission block, and the driving column penetrates through the through groove and is slidably connected to the transmission block.

[0009] An assembly device for the rotor structure of the high-speed permanent magnet motor includes a housing and an assembly plate capable of performing horizontal and vertical displacements in the housing, and further includes: A disk body fixed to the assembly plate through a fixed shaft, and a clamping or releasing clamping mechanism for the permanent magnet is arranged on the disk body; A pressing mechanism is provided on the fixed shaft and cooperates with the clamping mechanism; The assembly process of the permanent magnet includes a first stage and a second stage; First stage: The assembly plate descends, causing the permanent magnet to move into the installation groove; Second stage: The clamping mechanism releases the permanent magnet, and the pressing mechanism is triggered to cause the permanent magnet to completely sink into the installation groove.

[0010] As a further solution of the present invention: A plurality of notches are equidistantly arranged along the circumference at the bottom of the disk body, and the notches form stop positions for the permanent magnets. The clamping mechanism includes a plurality of sets of pressing components equidistantly arranged along the circumference on the disk body, and the pressing components can press the permanent magnets tightly in the notches; The plurality of sets of pressing components are also connected to a hydraulic cylinder installed on the assembly plate through a follower assembly, and the hydraulic cylinder can drive the plurality of sets of pressing components to perform opening and closing actions.

[0011] As a further solution of the present invention: A plurality of radially distributed guide grooves are equidistantly arranged along the circumference on the disk body. The pressing component includes a follower block slidably fitted in the guide groove and an assembly arm fixedly connected to the follower block, and two sets of pressing members are symmetrically arranged on the assembly arm; The pressing member includes a cross bar slidably arranged on the assembly arm and a clamping head fixed to one end of the cross bar facing the disk body. A second spring with both ends respectively connected to the clamping head and the assembly arm is also sleeved on the outer circumference of the cross bar.

[0012] As a further solution of the present invention: The follower assembly includes a first sleeve slidably sleeved on the fixed shaft, a transmission frame fixedly arranged on the follower block and connected to the first sleeve through a transmission rod, and both ends of the transmission rod are respectively hinged to the first sleeve and the transmission frame; A connecting head is arranged at the movable end of the hydraulic cylinder, and a push-pull rod is arranged between the connecting head and the first sleeve. Both ends of the push-pull rod are respectively hinged to the connecting head and the first sleeve.

[0013] As a further solution of the present invention: The pressing mechanism includes a second sleeve slidably sleeved on the fixed shaft and a plurality of pressing arms slidably arranged on the disk body. The plurality of pressing arms are equidistantly distributed in a circle, and each is fixed to the second sleeve through a cross arm; Wherein, a third spring is also sleeved on the outer circumference of the fixed shaft. One end of the third spring is connected to the second sleeve, and the other end is connected to an annular protrusion formed on the fixed shaft. The movable end of the hydraulic cylinder is also fixedly connected with a limiting plate member through a vertical arm, and the limiting plate member cooperates with a convex column fixed on the second sleeve.

[0014] As a further solution of the present invention: the limiting plate is provided with a groove body adapted to the convex column, the convex column extends into the groove body and is slidably connected to the limiting plate, and the groove body includes a first groove connected to each other and a second groove and a fifth groove respectively connected to both ends of the first groove; Among them, a fourth groove is connected between the second groove and the fifth groove, a third groove is connected between the fourth groove and the second groove, and a movable piece is hinged on the limiting plate. The movable piece is located at one end of the second groove away from the first groove, and its rotating axis is connected to a torsion spring.

[0015] A method for assembling a rotor using the assembly device comprises the following steps: Step 1: initial state adjustment, the hydraulic cylinder is started, and the pressing mechanism is forced to move upward, so that the notch is vacated to provide space for subsequent assembly; Step 2: Positioning of the permanent magnet and first-stage assembly: the disk is moved and adjusted to make the permanent magnet fit into the notch, and the clamping mechanism flexibly limits the permanent magnet. Then the disk is lowered to push the permanent magnet into the installation slot to complete the first-stage assembly. Step 3: Automatic triggering of the second stage of assembly: after the first stage is completed, the clamping mechanism releases the permanent magnet, and the pressing mechanism is automatically triggered to apply a downward thrust to the permanent magnet, so that it is completely immersed in the installation slot; Step 4: Assembly completion and inspection. After completing the above steps, the permanent magnet has been completely embedded in the installation slot. Finally, the assembled permanent magnet is inspected to ensure that it is accurately positioned and securely installed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In actual assembly, the rotor structure described in the present application cleverly combines the two methods of adhesive and mechanical fixing. Specifically, the permanent magnet is firstly fixed to the mounting slot by an adhesive to ensure the initial tight combination between the permanent magnet and the mounting slot, and the bonding properties of the adhesive are used to provide an initial fixing force for the permanent magnet. Then, in the key step of assembling the shaft, when the shaft is inserted into the socket, the elastic booster mechanism is cleverly triggered, and this triggering action further drives the fastening mechanism to move along the radial direction of the rotor core toward the installation slot. Through this mechanical matching method, the fastening mechanism can apply additional pressing force to the permanent magnet in the installation slot, thereby further enhancing the stability of the permanent magnet on the basis of adhesive fixation; It is worth mentioning that the innovation of this application lies in that the mechanical fixing method is automatically realized during the process of assembling the rotating shaft without adding extra independent assembling steps. This design not only simplifies the assembling process, but also effectively improves the production efficiency. At the same time, it ensures the stability and reliability of the permanent magnet in a high-speed rotating and high-vibration environment, significantly enhancing the overall performance and service life of the motor. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the rotor structure of a high-speed permanent magnet motor.

[0018] Figure 2 It is a schematic structural diagram of another angle of an embodiment of the rotor structure of a high-speed permanent magnet motor.

[0019] Figure 3 It is an exploded view of the structure of an embodiment of the rotor structure of a high-speed permanent magnet motor.

[0020] Figure 4 It is Figure 3 A schematic structural diagram of another angle.

[0021] Figure 5 It is a sectional view of the rotor core in an embodiment of the rotor structure of a high-speed permanent magnet motor.

[0022] Figure 6 It is Figure 5 A schematic structural diagram of another angle.

[0023] Figure 7 It is a schematic diagram of the connection relationship between the elastic boosting mechanism and the fastening mechanism in an embodiment of the rotor structure of a high-speed permanent magnet motor.

[0024] Figure 8 It is a schematic structural diagram of an embodiment of the assembling device.

[0025] Figure 9 It is a schematic structural diagram of another angle of an embodiment of the assembling device.

[0026] Figure 10 It is a schematic structural diagram of another angle of an embodiment of the assembling device.

[0027] Figure 11 It is a schematic diagram of the connection relationship between the clamping mechanism and the pressing mechanism in an embodiment of the assembling device.

[0028] Figure 12 It is Figure 11 An enlarged view of the structure at A in

[0029] Figure 13 It is an exploded view of the structure of the pressing mechanism in an embodiment of the assembling device.

[0030] Figure 14 For Figure 13 Schematic structural diagram from another perspective.

[0031] Figure 15 Schematic diagram of the connection state between the hydraulic cylinder and the limit plate in an embodiment of the assembly device.

[0032] Figure 16 Front view of the limit plate in an embodiment of the assembly device.

[0033] In the figure: 1, rotor core; 101, mounting groove; 102, cylindrical cavity; 103, assembly cavity; 104, jack; 2, rotating shaft; 3, permanent magnet; 4, end cover; 5, frustum; 6, transmission shaft; 7, first spring; 8, driven block; 801, inclined surface; 9, guide rail; 10, movable seat; 11, connecting rod; 12, driving column; 13, follower plate; 14, transmission block; 1401, through slot; 15, rubber column; 16, outer housing; 17, chuck; 18, vertical plate; 19, cross beam; 20, assembly plate; 21, fixed shaft; 2101, annular protrusion; 22, disc body; 2201, notch; 2202, guide groove; 23, follower block; 24, assembly arm; 25, connector; 26, cross bar; 27, second spring; 28, clamping head; 29, first sleeve; 30, second sleeve; 3001, convex column; 31, cross arm; 32, pressing arm; 33, third spring; 34, hydraulic cylinder; 35, push-pull rod; 36, transmission rod; 37, transmission frame; 38, vertical arm; 39, limit plate; 3901, first groove; 3902, second groove; 3903, third groove; 3904, fourth groove; 3905, fifth groove; 40, movable piece. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0036] Please refer to Figures 1 - 7, in an embodiment of the present invention, a rotor structure of a high-speed permanent magnet motor includes a rotor core 1 and a rotating shaft 2 fixed to the rotor core 1 through a jack 104 on the rotor core 1. A plurality of mounting grooves 101 for embedding permanent magnets 3 are equidistantly arranged along the circumference on the rotor core 1. A plurality of cylindrical cavities 102 communicating with the jack 104 are equidistantly arranged along the circumference inside the rotor core 1, and each cylindrical cavity 102 communicates with an assembly cavity 103; an elastic boosting mechanism is arranged in the cylindrical cavity 102, and the elastic boosting mechanism is connected to a fastening mechanism arranged in the assembly cavity 103. When the rotating shaft 2 enters the jack 104, it can cause the fastening mechanism to drive the elastic boosting mechanism to move towards the inside of the mounting groove 101.

[0037] Furthermore, end caps 4 are also fitted at both ends of the rotor core 1. The end caps 4 are used to seal both ends of the rotor core 1 and provide a stable working environment for the permanent magnets 3.

[0038] It should be noted that, as can be seen from the drawings, the rotor structure proposed in this application is an interior type. The advantage of the interior type rotor is that it can make full use of the reluctance torque generated by the asymmetry of the rotor magnetic circuit, improve the power density and torque density of the motor, so that the motor can output greater power and torque under the same volume, and meet the requirements of the driving range and dynamic performance in applications such as electric vehicles that have strict requirements on the volume and weight of the power system. It has a wide speed regulation range and strong field weakening ability, and can adapt to the speed and torque requirements under different working conditions, such as maintaining efficient operation during the acceleration and deceleration of electric vehicles. Since the permanent magnets 3 are embedded inside the rotor core 1 and are protected by the core, the interior type rotor motor can operate more stably in harsh working environments such as high temperature or strong magnetic field interference, and reduce the performance degradation or motor damage caused by demagnetization.

[0039] The permanent magnets 3 are embedded inside the rotor core 1. Through the support and fixation of the core, the entire rotor structure is more stable, can withstand greater centrifugal force, reduce motor failures caused by mechanical vibration or deformation, and exhibit higher mechanical strength during high-speed rotation. At the same time, the mass distribution of the rotor is more uniform, which is beneficial to achieving good dynamic balance, reducing vibration and noise during motor operation, and improving the operation stability and comfort of the motor. In addition, the direct-axis and quadrature-axis inductances of the interior type rotor motor are not equal, with a large inductance difference, providing a better basis for advanced control strategies such as vector control and direct torque control. By reasonably controlling the d-axis and q-axis currents, the torque and magnetic flux of the motor can be adjusted more precisely, achieving high-precision and high-dynamic performance control. These advantages have enabled the interior type rotor to be widely used in many fields such as electric vehicles, industrial automation equipment, high-speed centrifuges, robot joint motors, and numerical control machine tools, and can meet the high requirements for motor performance in different application scenarios.

[0040] In the actual production process of the current motor manufacturing industry, when it is necessary to assemble the key component called permanent magnet 3, the conventional practice is to firmly bond and fix it inside the mounting groove 101 with the help of adhesive. However, after a lot of practical verification, the durability of adhesive has certain limitations. Specifically, considering that the motor is often faced with a complex environment of high-speed rotation or high vibration during actual use, this working condition puts extremely high requirements on the fixing method of permanent magnet 3. In the long-term operation process, the performance of the adhesive will gradually decline, and problems such as aging and failure will occur. Especially in the harsh environment of high temperature or humidity, these problems will be further amplified, causing the fixing stability of permanent magnet 3 to be seriously affected. In addition, there are inevitably damp or corrosive substances in the inner cavity of the motor, which will corrode the adhesive, destroy its bonding performance, and then have an adverse effect on the working performance of the motor, and may even cause motor operation failure, affecting its normal service life and work efficiency.

[0041] Based on the above problems, the industry has also tried to use mechanical fixing to fix the permanent magnet 3. This method can make up for the shortcomings of the adhesive fixing method to a certain extent and provide a more reliable fixing effect. However, in high-speed rotation or high-vibration environments, relying solely on mechanical fixing methods may not provide sufficient fixing force, resulting in the permanent magnet 3 becoming loose or falling off, which undoubtedly brings potential risks to the stable operation of the motor.

[0042] In order to solve the above problems, some rotor structures have begun to explore the combination of adhesives and mechanical fixation to assemble the permanent magnet 3, in order to achieve a more ideal fixing effect and ensure that the permanent magnet 3 has sufficient stability. However, in the specific implementation process, this combined fixing method usually needs to be carried out in two steps, which undoubtedly complicates the assembly process of the permanent magnet 3. The increase in assembly steps not only prolongs the production cycle, but may also lead to a decrease in assembly efficiency, thereby affecting the efficiency and production capacity of the entire motor production process.

[0043] In the field of high-speed permanent magnet motor manufacturing, the traditional rotor structure faces many challenges during the assembly process. Based on the above shortcomings, this application innovatively proposes a rotor structure for a high-speed permanent magnet motor, aiming to effectively solve the limitations of the permanent magnet 3 fixing method in the prior art and significantly improve the stability and reliability of the permanent magnet 3.

[0044] In actual assembly, the rotor structure described in the present application cleverly combines the two methods of adhesive and mechanical fixing. Specifically, the permanent magnet 3 is first initially fixed to the mounting groove 101 by an adhesive to ensure the initial tight connection between the permanent magnet 3 and the mounting groove 101, and the bonding properties of the adhesive are used to provide an initial fixing force for the permanent magnet 3.

[0045] Subsequently, in the key step of assembling the rotating shaft 2, when the rotating shaft 2 is inserted into the jack 104, it will cleverly trigger the elastic boosting mechanism. This triggering action further drives the fastening mechanism to move radially towards the installation groove 101 in the rotor core 1. In this way of mechanical cooperation, the fastening mechanism can apply an additional pressing force to the permanent magnet 3 located in the installation groove 101, thereby further enhancing the stability of the permanent magnet 3 on the basis of adhesive fixation.

[0046] It is worth mentioning that the innovation of this application lies in that the mechanical fixing method is automatically realized during the process of assembling the rotating shaft 2 without adding additional independent assembling steps. This design not only simplifies the assembling process, but also effectively improves the production efficiency. At the same time, it ensures the stability and reliability of the permanent magnet 3 in high-speed rotation and high-vibration environments, significantly enhancing the overall performance and service life of the motor.

[0047] Please refer to again Figure 6 and Figure 7 The elastic boosting mechanism includes a frustum 5 slidably disposed in the cylindrical cavity 102 and a transmission shaft 6 fixed to the frustum 5. One end of the transmission shaft 6 extends into the assembly cavity 103 and is connected to the fastening mechanism, and the other end is fixedly provided with a driven block 8. An inclined surface 801 is provided on the side of the driven block 8 facing away from the transmission shaft 6; a first spring 7 sleeved on the outer periphery of the transmission shaft 6 is further provided in the cylindrical cavity 102, and both ends of the first spring 7 are respectively connected to the inside of the cylindrical cavity 102 and the frustum 5.

[0048] During the manufacturing process of a high-speed permanent magnet motor, the assembly accuracy and reliability of the rotor structure are crucial for the overall performance of the motor. The rotor structure described in this application demonstrates a delicate design and an efficient assembly method when assembling the rotating shaft 2.

[0049] When the rotating shaft 2 is inserted into the jack 104, the end of the rotating shaft 2 will contact the inclined surface 801. The special design of the inclined surface 801 enables the rotating shaft 2 to smoothly guide and prompt the driven block 8 to make a yielding action when inserted. Specifically, the driven block 8 moves towards the cylindrical cavity 102 under the push of the end of the rotating shaft 2. At the same time, the transmission shaft 6 gradually moves towards the assembly cavity 103 as the driven block 8 moves. During this process, the frustum 5 compresses the first spring 7, storing elastic potential energy in the spring.

[0050] As the transmission shaft 6 moves, it further drives the fastening mechanism to move radially towards the inside of the mounting groove 101 along the rotor core 1. This action of the fastening mechanism can apply an accurate and uniform pressing force to the permanent magnet 3 located in the mounting groove 101. Thus, on the basis of adhesive fixation, the stability of the permanent magnet 3 is further enhanced, realizing the synergistic effect of the two methods of adhesive and mechanical fixation.

[0051] This innovative design not only simplifies the assembly process without adding extra assembly steps, but also effectively improves the production efficiency. At the same time, it ensures the stability and reliability of the permanent magnet 3 in high-speed rotation and high-vibration environments, significantly enhancing the overall performance and service life of the motor, and providing a solid and effective guarantee for the stability of the assembly of the permanent magnet 3.

[0052] The fastening mechanism includes a follower plate 13 movably arranged in the assembly cavity 103. A plurality of rubber columns 15 are arranged on the follower plate 13, and the follower plate 13 can move radially along the rotor core 1 so that the plurality of rubber columns 15 enter the mounting groove 101. A guide rail 9 is arranged inside the assembly cavity 103, and a movable seat 10 is slidably fitted on the guide rail 9. One end of the transmission shaft 6 away from the driven block 8 is connected to the movable seat 10 through a connecting rod 11, and two ends of the connecting rod 11 are respectively hinged to the transmission shaft 6 and the movable seat 10; A driving column 12 is arranged on the movable seat 10. Two transmission blocks 14 are also arranged on one side of the follower plate 13 facing the guide rail 9. A through groove 1401 adapted to the driving column 12 is obliquely arranged on the transmission block 14, and the driving column 12 penetrates through the through groove 1401 and is slidably connected to the transmission block 14.

[0053] It should be added that a guiding structure for guiding the movement of the follower plate 13 should also be arranged in the assembly cavity 103, including a guiding column fixed in the assembly cavity 103, passing through the follower plate 13 and slidably connected to the follower plate 13; Secondly, a plurality of round holes are arranged on one side of the assembly cavity 103 close to the mounting groove 101. When assembling the rotating shaft 2, the rubber columns 15 are located in the round holes but do not extend into the mounting groove 101.

[0054] When the rotating shaft 2 is assembled, the end of the rotating shaft 2 will squeeze the driven block 8, thereby causing the driven block 8 to give way to the transmission shaft 6. Correspondingly, the transmission shaft 6 pushes the movable seat 10 to slide along the guide rail 9 through the connecting rod 11, and the driving column 12 slides with the transmission block 14 through the through groove 1401, so that the follower plate 13 has a movement drive toward the installation groove 101. Therefore, the rubber column 15 will apply pressure to the permanent magnet 3 located in the installation groove 101 at this time, and deform itself. This deformation can absorb and store part of the energy, and the rubber has viscoelasticity, that is, it exhibits both elastic and viscous properties when subjected to force. This viscoelasticity enables the rubber column 15 to produce a certain damping effect when subjected to force, further absorb and dissipate energy, enhance the tightening effect, and provide effective protection for the stability of the permanent magnet 3.

[0055] See also Figures 8 - 16 , an assembly device for the rotor structure of the high-speed permanent magnet motor, comprising an outer shell 16 and an assembly plate 20 capable of horizontal and vertical displacement in the outer shell 16, and further comprising: The disc body 22 is fixed to the assembly plate 20 via the fixed shaft 21, and the disc body 22 is provided with a clamping mechanism for clamping or releasing the permanent magnet 3; A pressing mechanism, disposed on the fixed shaft 21 and cooperating with the clamping mechanism; The assembly process of the permanent magnet 3 includes a first stage and a second stage; The first stage: the assembly plate 20 descends, causing the permanent magnet 3 to move into the installation slot 101; The second stage: the clamping mechanism releases the permanent magnet 3 , and the pressing mechanism is triggered, causing the permanent magnet 3 to be completely immersed in the installation groove 101 .

[0056] Among them, it should be supplemented that two relatively arranged vertical plates 18 are provided in the outer shell 16, and a crossbeam 19 is slidably provided between the two vertical plates 18, and the assembly plate 20 is slidably embedded in the bottom of the crossbeam 19. In specific implementation, the outer shell 16 is also provided with two sets of driving mechanisms, which are respectively used to drive the crossbeam 19 to rise and fall, so that after the clamping mechanism clamps the permanent magnet 3, the crossbeam 19 can drive the assembly plate 20 and the disk 22 to descend, so that the permanent magnet 3 is gradually inserted into the installation groove 101, realizing the first stage of the assembly process, and then, the clamping mechanism releases the permanent magnet 3, and the pressing mechanism is triggered, so that the permanent magnet 3 can be completely immersed in the installation groove 101; Secondly, a chuck 17 is further provided inside the outer housing 16. The chuck 17 is used to fix the rotor core 1 during operation, ensuring that the rotor core 1 remains stable during the process of installing the permanent magnet 3, thereby guaranteeing the accuracy of the docking between the permanent magnet 3 and the installation groove 101.

[0057] Please refer to again Figure 11 , a plurality of notches 2201 are equidistantly arranged along the circumference at the bottom of the disk body 22. The notches 2201 form a stop position for the permanent magnet 3. The clamping mechanism includes a plurality of groups of pressing components arranged equidistantly along the circumference on the disk body 22. The pressing components can press the permanent magnet 3 tightly in the notches 2201; the plurality of groups of pressing components are also connected to a hydraulic cylinder 34 installed on the assembly plate 20 through a follower assembly. The hydraulic cylinder 34 can drive the plurality of groups of pressing components to perform opening and closing actions.

[0058] Please refer to again Figure 12 And Figure 13 , a plurality of radially distributed guide grooves 2202 are equidistantly arranged along the circumference on the disk body 22. The pressing component includes a follower block 23 slidably fitted in the guide grooves 2202 and an assembly arm 24 fixedly connected to the follower block 23. Two groups of pressing members are symmetrically arranged on the assembly arm 24; the pressing member includes a cross bar 26 slidably arranged on the assembly arm 24 and a clamping head 28 fixed to one end of the cross bar 26 facing the disk body 22. A second spring 27 with two ends respectively connected to the clamping head 28 and the assembly arm 24 is also sleeved on the outer circumference of the cross bar 26.

[0059] Specifically, during the assembly work, a placement table should be provided on the side of the chuck 17. This placement table is used for temporarily storing the permanent magnet 3 conveyed by the manipulator. Thus, under the combined action of the lifting movement of the cross beam 19 and the horizontal movement of the assembly plate 20, the notches 2201 can be aligned with the permanent magnet 3. Immediately afterwards, when the hydraulic cylinder 34 works, it can drive the plurality of follower blocks 23 to perform a closing action through the follower assembly. The assembly arm 24 drives the clamping head 28 to approach the permanent magnet 3 until the cross bar 26 slides relative to the assembly arm 24, and the second spring 27 is compressed. The clamping head 28 can then press the permanent magnet 3 tightly, so that the permanent magnet 3 is stably held in the notches 2201; Subsequently, the assembly plate 20 drives the disk body 22 to return directly above the chuck 17, and the cross beam 19 descends. During this process, the clamping head 28 laterally limits the permanent magnet 3. As the disk body 22 is pressed down, the permanent magnet 3 can be inserted into the installation groove 101; After a part of the permanent magnet 3 enters the installation groove 101, the hydraulic cylinder 34 drives a plurality of follower blocks 23 to open through the follower assembly until the clamping head 28 is separated from the permanent magnet 3. Correspondingly, the pressing mechanism is triggered, and the pressing mechanism moves axially along the fixed shaft 21 to apply a downward pressure to the permanent magnet 3, so that the permanent magnet 3 is completely immersed in the installation groove 101; Among them, when clamping the permanent magnet 3, the cross bar 26 and the assembly arm 24 can slide relative to each other, and the second spring 27 is compressed during this process, thereby endowing the permanent magnet 3 with the function of flexible limit. This design brings significant advantages in many aspects. First, it effectively avoids the risk of damage to the permanent magnet 3 caused by improper or excessive clamping force during rigid clamping, and effectively guarantees the physical integrity of the permanent magnet 3. Secondly, if only relying on controlling the oil filling amount of the hydraulic cylinder 34 to adjust the clamping force, this has extremely high requirements for the accuracy of the oil filling amount. However, by adopting the above flexible limit design, the dependence on the control accuracy of the oil filling amount can be reduced to a certain extent, making the debugging and operation of the entire clamping system more simple and reliable, greatly improving the production efficiency and quality control level, providing a more scientific and reasonable solution for the assembly work of the permanent magnet 3, and effectively promoting the smooth progress of the relevant production process and the steady improvement of product quality.

[0060] In summary, the present application innovatively equips the disk body 22 with a clamping mechanism capable of performing opening and closing actions to accurately position the permanent magnet 3 in the notch 2201. As the disk body 22 descends smoothly, the permanent magnet 3 is steadily pushed into the installation groove 101, thus successfully completing the first stage of the assembly process. When the first stage is successfully completed, the clamping mechanism will release the permanent magnet 3 in a timely manner. At this time, the pressing mechanism will be automatically triggered to apply a downward thrust to the permanent magnet 3, so that it can be completely immersed in the installation groove 101, thereby ensuring the stable installation of the permanent magnet 3.

[0061] It can be seen from the above assembly process that the first stage and the second stage of the assembly in the present application are coordinated with each other through a carefully designed mechanical structure, so that they can be carried out orderly and efficiently in sequence. In sharp contrast to the traditional assembly method: in the traditional method, first, the permanent magnet 3 needs to be clamped by a clamping part and then placed in the installation groove 101. However, in this process, the clamped part of the permanent magnet 3 often cannot completely enter the installation groove 101 at one time, which results in that after the permanent magnet 3 is released from the clamp and the clamping part is moved away, an additional mechanism is needed to make the permanent magnet 3 completely immersed in the installation groove 101. In this way, the entire assembly process becomes relatively complex, and each component needs to consume a certain amount of time during the displacement process, thus greatly reducing the coherence between the two stages of the permanent magnet 3 assembly, and also having a certain negative impact on the fixing effect of the adhesive.

[0062] Through the ingenious mechanical structure design of the present application, the coherence between the first stage and the second stage of assembling the permanent magnet 3 has been significantly improved. After the end of the first stage, it can quickly and smoothly enter the second stage by means of the automatic triggering of the pressing mechanism. This tightly connected method effectively reduces the degree to which the fixing effect of the adhesive is affected due to the pause in the assembling process, thus ensuring the efficiency and stability of the entire assembling process and providing a strong guarantee for improving product quality.

[0063] The follower assembly includes a first sleeve 29 slidably sleeved on the fixed shaft 21, a transmission frame 37 fixedly arranged on the follower block 23 and connected to the first sleeve 29 through a transmission rod 36. The two ends of the transmission rod 36 are respectively hinged to the first sleeve 29 and the transmission frame 37; a connecting head 25 is arranged at the movable end of the hydraulic cylinder 34, and a push-pull rod 35 is arranged between the connecting head 25 and the first sleeve 29. The two ends of the push-pull rod 35 are respectively hinged to the connecting head 25 and the first sleeve 29.

[0064] During operation, when the movable end of the hydraulic cylinder 34 contracts, the connecting head 25 can pull the first sleeve 29 to slide upward on the fixed shaft 21 through the push-pull rod 35. The first sleeve 29 can then pull the follower block 23 to slide toward the fixed shaft 21 in the guide groove 2202 through the transmission frame 37, and the clamping head 28 will approach the permanent magnet 3 and finally clamp the permanent magnet 3.

[0065] It should be noted that as shown in the appendix Figure 11 After the successful completion of the second stage, the entire system enters the work preparation stage. At this time, the disk body 22 needs to perform a series of precise movement adjustment operations. Before officially starting work to make the permanent magnet 3 accurately fit with the notch 2201, the hydraulic cylinder 34 will be started in advance and steadily cause the pressing mechanism to move upward. The main purpose of this key action is to ensure that the notch 2201 can be emptied in a timely and sufficient manner, providing the necessary and sufficient space conditions for the precise positioning and installation of the subsequent permanent magnet 3. This design not only optimizes the coherence of the entire assembling process but also improves the stability and reliability of the equipment operation, thereby contributing to the improvement of production efficiency and product quality.

[0066] Please refer to again Figure 13 、 Figure 15 and Figure 16, the pressing mechanism includes a second sleeve 30 slidably sleeved on the fixed shaft 21 and a plurality of pressing arms 32 slidably disposed on the disk body 22. The plurality of pressing arms 32 are circumferentially and equidistantly distributed, and each is fixed to the second sleeve 30 through a cross arm 31. An outer periphery of the fixed shaft 21 is further sleeved with a third spring 33. One end of the third spring 33 is connected to the second sleeve 30, and the other end is connected to an annular protrusion 2101 formed on the fixed shaft 21. A movable end of the hydraulic cylinder 34 is further fixedly connected with a limiting plate member 39 through a vertical arm 38, and the limiting plate member 39 cooperates with a convex post 3001 fixed on the second sleeve 30.

[0067] It should be added that during the assembly process, the pressing arms 32 will slide up and down on the disk body 22. To avoid interference between the movement of the pressing arms 32 and the transmission frame 37, a rectangular area is formed inside the transmission frame 37, and the cross arm 31 passes through the rectangular area and is fixedly connected to the second sleeve 30 and the pressing arm 32 at both ends respectively, ensuring that the movements of all components do not affect each other.

[0068] The limiting plate member 39 is provided with a groove body adapted to the convex post 3001. The convex post 3001 extends into the groove body and is slidably connected to the limiting plate member 39. The groove body includes a connected first groove 3901 and second grooves 3902 and fifth grooves 3905 respectively connected to both ends of the first groove 3901; Wherein, a fourth groove 3904 is connected between the second groove 3902 and the fifth groove 3905, and a third groove 3903 is communicated between the fourth groove 3904 and the second groove 3902. A movable piece 40 is further hinged on the limiting plate member 39. The movable piece 40 is located at an end of the second groove 3902 away from the first groove 3901, and its rotating shaft is connected with a torsion spring.

[0069] It should be added that the fifth groove 3905 is perpendicular to the first groove 3901 and the fourth groove 3904, and the length of the first groove 3901 is less than that of the fourth groove 3904, so that the second groove 3902 is inclined, and the third groove 3903 is collinear with the fourth groove 3904. Refer to the appendix Figure 16 , the movable piece 40 can rotate counterclockwise, but cannot rotate clockwise; In the appendix Figure 11For example, at this time, the boss 3001 is located at the connection between the first groove 3901 and the fifth groove 3905. When the movable end of the hydraulic cylinder 34 contracts, the first groove 3901, the second groove 3902 and the third groove 3903 will pass through the boss 3001 in sequence, and the boss 3001 will slide with the limiting plate 39 through the second groove 3902, so that the second sleeve 30 slides upward on the fixed shaft 21. Accordingly, the third spring 33 is compressed, and the second sleeve 30 drives the pressure arm 32 to rise through the cross arm 31, so that the pressure arm 32 makes room for the notch 2201. It should be emphasized that the length of the third groove 3903 is longer than that of the fourth groove 3904. The purpose of such a setting is that after the boss 3001 switches from the second groove 3902 to the third groove 3903, the process of the third groove 3903 passing through the boss 3001 is the process of the clamping head 28 approaching the permanent magnet 3. After the first stage of assembling the permanent magnet 3 is completed, the movable end of the hydraulic cylinder 34 is extended, and when the third groove 3903 passes the boss 3001, the clamping head 28 releases the limit of the permanent magnet 3 located in the notch 2201. When the connection between the fourth groove 3904 and the fifth groove 3905 reaches the boss 3001, the third spring 33 rebounds, so that the second sleeve 30 slides downward on the fixed shaft 21. Accordingly, the second sleeve 30 drives the pressing arm 32 to press down the permanent magnet 3 through the cross arm 31, so that the permanent magnet 3 is completely immersed in the installation groove 101. Therefore, through the clever mechanical structure design, the consistency between the first stage and the second stage of assembling the permanent magnet 3 is significantly improved. After the first stage is completed, the second stage can be quickly and smoothly entered with the help of the automatic triggering of the pressing mechanism. This close connection method effectively reduces the degree to which the adhesive fixation effect is affected by the pause in the assembly process.

[0070] As another embodiment of the present invention, a method for assembling a rotor using the assembly device is also proposed, comprising the following steps: Step 1: initial state adjustment, the hydraulic cylinder 34 is started, causing the pressing mechanism to move upward, so that the notch 2201 is vacated to provide space for subsequent assembly; Step 2: Positioning of the permanent magnet 3 and first-stage assembly: the disk 22 is moved and adjusted so that the permanent magnet 3 matches the notch 2201, and the clamping mechanism flexibly limits the permanent magnet 3. Then the disk 22 is lowered to push the permanent magnet 3 into the installation slot 101, completing the first-stage assembly; Step 3: Automatic triggering of the second-stage assembly. After the first stage ends, the clamping mechanism releases the permanent magnet 3, and the pressing mechanism is automatically triggered to apply a downward thrust to the permanent magnet 3, causing it to be completely immersed in the installation groove 101. Step 4: Completion of assembly and inspection. After the above steps are completed, the permanent magnet 3 has been completely embedded in the installation groove 101. Finally, the assembled permanent magnet is inspected to ensure its accurate position, firm installation, and good adhesive fixation effect.

[0071] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0072] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotor structure of a high-speed permanent magnet motor, characterized in that: The invention comprises a rotor core and a rotating shaft fixed to the rotor core through a plug hole on the rotor core, wherein the rotor core is provided with a plurality of mounting grooves for embedding permanent magnets at equal intervals along the circumference, and the rotor core is provided with a plurality of cylindrical cavities connected to the plug holes at equal intervals along the circumference, and each of the cylindrical cavities is connected to an assembly cavity; An elastic boosting mechanism is provided in the cylindrical cavity, and the elastic boosting mechanism is connected to a fastening mechanism provided in the assembly cavity. When the rotating shaft enters the insertion hole, the fastening mechanism can drive the elastic boosting mechanism to move toward the installation groove.

2. The rotor structure of a high-speed permanent magnet motor according to claim 1, characterized in that: The elastic boosting mechanism comprises a truncated table slidably arranged in the cylindrical cavity and a transmission shaft fixed to the truncated table, one end of the transmission shaft extends into the assembly cavity and is connected to the fastening mechanism, and the other end is fixedly provided with a driven block, and the driven block is provided with an inclined surface on a side away from the transmission shaft; Wherein, a first spring sleeved on the outer circumference of the transmission shaft is further provided in the cylindrical cavity, and two ends of the first spring are respectively connected to the inside of the cylindrical cavity and the truncated cone.

3. The rotor structure of a high-speed permanent magnet motor according to claim 2, characterized in that: The fastening mechanism comprises a follower plate movably arranged in the assembly cavity, a plurality of rubber columns are arranged on the follower plate, and the follower plate can move along the radial direction of the rotor core so that the plurality of rubber columns enter the installation groove; Wherein, a guide rail is arranged inside the assembly cavity, a movable seat is slidably engaged on the guide rail, one end of the transmission shaft away from the driven block is connected to the movable seat through a connecting rod, and both ends of the connecting rod are hinged to the transmission shaft and the movable seat respectively; The movable seat is provided with a driving column, and two transmission blocks are also provided on the side of the follower plate facing the guide rail. The transmission block is provided with an inclined through groove adapted to the driving column, and the driving column passes through the through groove and is slidably connected with the transmission block.

4. An assembly device for the rotor structure of a high-speed permanent magnet motor as claimed in claim 1, comprising an outer shell and an assembly plate capable of horizontal and vertical displacement in the outer shell, characterized in that: Also includes: A disc body is fixed to the assembly plate via a fixed shaft, and the disc body is provided with a clamping mechanism for clamping or releasing the permanent magnet; A pressing mechanism, disposed on the fixed shaft and cooperating with the clamping mechanism; The permanent magnet assembly process includes the first stage and the second stage; The first stage: the assembly plate descends, causing the permanent magnet to move into the installation slot; The second stage: the clamping mechanism releases the permanent magnet, and the pressing mechanism is triggered, causing the permanent magnet to be completely immersed in the installation groove.

5. An assembly device according to claim 4, characterized in that: The bottom of the disk body is provided with a plurality of notches equidistantly along the circumference, the notches forming the stopper positions of the permanent magnets, the clamping mechanism comprises a plurality of groups of pressing components equidistantly arranged on the disk body along the circumference, the pressing components being capable of pressing the permanent magnets tightly into the notches; The plurality of groups of the pressing assemblies are also connected to a hydraulic cylinder installed on the assembly plate through a follower assembly, and the hydraulic cylinder can drive the plurality of groups of the pressing assemblies to perform opening and closing actions.

6. An assembly device according to claim 5, characterized in that: The disc body is provided with a plurality of radially distributed guide grooves at equal intervals along the circumference, the pressing assembly comprises a follower block slidably engaged in the guide groove and an assembly arm fixedly connected to the follower block, and the assembly arm is symmetrically provided with two groups of pressure members; The pressure member includes a cross bar slidably arranged on the assembly arm and a clamping head fixed to one end of the cross bar facing the disc body. The outer periphery of the cross bar is also sleeved with a second spring with two ends respectively connecting the clamping head and the assembly arm.

7. An assembly device according to claim 6, characterized in that: The follower assembly comprises a first sleeve slidably sleeved on the fixed shaft, a transmission frame fixedly mounted on the follower block and connected to the first sleeve via a transmission rod, and two ends of the transmission rod are respectively hinged to the first sleeve and the transmission frame; A connecting head is provided at the movable end of the hydraulic cylinder, a push-pull rod is provided between the connecting head and the first sleeve, and two ends of the push-pull rod are respectively hinged to the connecting head and the first sleeve.

8. An assembly device according to claim 5, characterized in that: The pressing mechanism comprises a second sleeve slidably mounted on the fixed shaft and a plurality of pressing arms slidably mounted on the disc body, wherein the plurality of pressing arms are equidistantly distributed around the circumference and each of the pressing arms is fixed to the second sleeve via a transverse arm; Among them, a third spring is also sleeved on the outer circumference of the fixed shaft, one end of the third spring is connected to the second sleeve, and the other end is connected to the annular protrusion formed on the fixed shaft. The movable end of the hydraulic cylinder is also fixedly connected to a limiting plate through a vertical arm, and the limiting plate cooperates with a protruding column fixed on the second sleeve.

9. An assembly device according to claim 8, characterized in that: The limiting plate is provided with a groove body adapted to the boss, the boss extends into the groove body and is slidably connected to the limiting plate, and the groove body includes a first groove connected to each other and a second groove and a fifth groove respectively connected to both ends of the first groove; Among them, a fourth groove is connected between the second groove and the fifth groove, a third groove is connected between the fourth groove and the second groove, and a movable piece is hinged on the limiting plate. The movable piece is located at one end of the second groove away from the first groove, and its rotating axis is connected to a torsion spring.

10. A method for assembling a rotor using the assembly device according to claim 4, characterized in that: The following steps are involved: Step 1: initial state adjustment, the hydraulic cylinder is started, and the pressing mechanism is forced to move upward, so that the notch is vacated to provide space for subsequent assembly; Step 2: Positioning of the permanent magnet and first-stage assembly: the disk is moved and adjusted to make the permanent magnet fit into the notch, and the clamping mechanism flexibly limits the permanent magnet. Then the disk is lowered to push the permanent magnet into the installation slot to complete the first-stage assembly. Step 3: Automatic triggering of the second stage of assembly: after the first stage is completed, the clamping mechanism releases the permanent magnet, and the pressing mechanism is automatically triggered to apply a downward thrust to the permanent magnet, so that it is completely immersed in the installation slot; Step 4: Assembly completion and inspection. After completing the above steps, the permanent magnet has been completely embedded in the installation slot. Finally, the assembled permanent magnet is inspected to ensure that it is accurately positioned and securely installed.

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