Permanent magnet motor rotor magnetic steel fixing structure and processing device thereof

Abstract

The invention provides a permanent magnet motor rotor magnetic steel fixing structure and a processing device thereof. A plurality of magnetic steels are sleeved on the periphery of the rotating shaft, and a magnetic isolation bridge is arranged between adjacent magnetic steels; a first fastening layer, a bonding layer and a second fastening layer are sequentially arranged on the periphery of the magnetic steel, at least part of the bonding layer is arranged between the peripheral face of the magnetic steel and the first fastening layer, at least part of the bonding layer is arranged on the outer surface of the side, away from the magnetic steel, of the first fastening layer, and the second fastening layer is arranged on the outer side of the bonding layer in a surrounding mode in the circumferential direction of the rotating shaft. The tensile strength of the second fastening layer is larger than that of the first fastening layer, and the bonding layer is made of insulating materials. Through the above structure, the multi-layer structure of the magnetic steel bears centrifugal force together under the working condition of high-speed rotation, the second fastening layer bears main circumferential tensile stress, and the insulation bonding layer is matched to improve the fixing strength and anti-throwing capability of the magnetic steel, reduce stress concentration, restrain an eddy current loop and heat, and give consideration to both mechanical safety and electromagnetic performance. The rotor is suitable for high-rotating-speed and high-power permanent magnet motor rotors.

Description

A permanent magnet motor rotor magnet fixing structure and its processing device Technical Field

[0001] This specification relates to the field of permanent magnet motor technology, and in particular to a permanent magnet motor rotor magnet fixing structure and its processing device. Background Technology

[0002] Currently, permanent magnet motors are increasingly widely used in high-power, high-speed applications such as mining centrifugal fans due to their high energy efficiency, good operational stability, low vibration and noise, fast dynamic response, and large output torque. In traditional mining centrifugal fan systems, high-power, high-speed asynchronous motors are often used as drive motors. These asynchronous motors typically generate a magnetic field through induction by squirrel-cage or wound-rotor conductors. Their slender conductors are embedded in the rotor core, and multiple windings form a whole. While this method is easy to fix, it results in low overall efficiency, significant vibration and noise during operation, and insufficient stability, making it difficult to meet the requirements of energy saving, consumption reduction, and high reliability.

[0003] In permanent magnet motors, the rotor typically uses neodymium iron boron permanent magnets to generate the magnetic field. Multiple magnets are circumferentially sleeved around the outer periphery of the shaft, and are usually supported and isolated by a magnetic bridge in the rotor core. In existing technology, to fix multiple magnets to the shaft, common methods include tightening the outer periphery of the magnets with metal sleeves or non-magnetic retaining rings, or applying adhesive between the magnets and the rotor core, as well as to the outer surface of the magnets, for bonding and fixation. In high-power, high-speed applications such as mining centrifugal fans, the rotor is subjected to significant centrifugal force and wind friction loads during operation. If the magnets are not securely fixed, they may loosen or shift during long-term operation, affecting the motor's operational safety and service life.

[0004] Against this backdrop, existing permanent magnet motor rotor magnet fixing structures still suffer from insufficient magnet fixing reliability and unsatisfactory stress distribution when adapting to high-speed, high-power operating conditions, making it difficult to balance mechanical strength, motor performance, and long-term operational stability. Therefore, it is necessary to provide a permanent magnet motor rotor magnet fixing structure to improve the fixing state of multiple magnets on the outer circumference of the rotor shaft, thereby enhancing the fixing effect and operational reliability under high-load conditions. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this specification provides a permanent magnet motor rotor magnet fixing structure.

[0006] According to a first aspect of the embodiments of this specification, a permanent magnet motor rotor magnet fixing structure is provided for fixing a plurality of magnets to the rotating shaft of the permanent magnet motor; the plurality of magnets are sleeved on the outer periphery of the rotating shaft, and magnetic isolation bridges are provided between adjacent magnets; the fixing structure includes: a first fastening layer, which is arranged around the circumference of the rotating shaft and adheres to the outer peripheral surface of the plurality of magnets; an adhesive layer, which is at least partially disposed between the outer peripheral surface of the plurality of magnets and the first fastening layer, and at least partially disposed on the outer surface of the first fastening layer away from the plurality of magnets; a second fastening layer, which is arranged around the circumference of the rotating shaft outside the adhesive layer and adheres to the adhesive layer; wherein the tensile strength of the second fastening layer is greater than the tensile strength of the first fastening layer; the adhesive layer is made of an insulating material.

[0007] In this embodiment, by providing an insulating adhesive layer on the outer periphery of the magnet, the first fastening layer is bonded to the outer periphery of the magnet via the adhesive layer. A second fastening layer with higher tensile strength is then bonded to the outside of the first fastening layer via the adhesive layer. This creates an integrated multi-layered stress-bearing structure between the magnet, the adhesive layer, the first fastening layer, the adhesive layer, and the second fastening layer. Under high-speed rotation, the centrifugal force is jointly borne by the rotor core and the two fastening layers. The second fastening layer bears the main circumferential tensile stress, while the first fastening layer and the adhesive layer serve to bond, buffer, and equalize stress. This significantly improves the fixing strength and anti-spillage capability between the magnet and the shaft, enhancing the mechanical safety and fatigue resistance of the rotor under high-speed, high-power conditions. The adhesive layer uses insulating material, which not only ensures reliable bonding and uniform load transfer between the magnet and the first fastening layer, and between the first fastening layer and the second fastening layer, but also effectively blocks the conductive path between the metal layers and between the magnet and the metal layer, suppresses the formation of circumferential eddy current loops, reduces rotor eddy current loss and heat generation, and has less negative impact on electromagnetic air gap and motor performance, thus helping to improve the efficiency and long-term operational stability of permanent magnet motors.

[0008] In some embodiments of this disclosure, based on the foregoing scheme, the thickness of the magnetic isolation bridge between adjacent magnets in the radial direction along the axis of rotation is between 2.5 mm and 3.0 mm.

[0009] In this embodiment, by limiting the thickness of the magnetic isolation bridge between adjacent magnets in the radial direction along the rotating shaft to 2.5mm to 3.0mm, on the one hand, the magnetic isolation bridge has sufficient mechanical strength and rigidity under high-speed rotation conditions, which can reliably withstand the centrifugal force generated by the magnets and rotor, reducing the risk of cracking, damage or deformation of the magnetic isolation bridge, thereby improving the mechanical safety and fatigue life of the rotor; on the other hand, it avoids the magnetic isolation bridge being too thick, which would increase the magnetic circuit reluctance and reduce the effective magnetic flux, or the magnetic isolation bridge being too thin, which would lead to insufficient mechanical strength. A better balance is achieved between mechanical performance and electromagnetic performance, which is beneficial to ensuring the output performance and operational stability of the permanent magnet motor.

[0010] In some embodiments of this disclosure, based on the aforementioned scheme, the magnet has a recessed portion on the side near the rotating shaft; the recessed portion forms a gap with the outer peripheral side of the rotating shaft; the permanent magnet motor rotor magnet fixing structure further includes: a filling portion disposed within the gap.

[0011] In this embodiment, by providing a recessed portion on the side of the magnet near the shaft, a gap is formed between the recessed portion and the outer periphery of the shaft, and a filling portion is provided within this gap. This creates a filled transition structure between the magnet and the shaft. On the one hand, this increases the contact area and meshing shape between the two, which helps improve the support and constraint capacity of the magnet relative to the shaft, preventing the magnet from loosening, shaking, or falling off under high-speed operating conditions. On the other hand, the filling portion can act as a buffer and stress equalization between the magnet and the shaft, reducing local stress concentration and improving the fatigue resistance and operational reliability of the rotor structure. At the same time, the filling portion can be made of materials with insulating, corrosion-resistant, or thermally conductive properties as needed, thereby further improving electrical safety, environmental adaptability, and heat dissipation performance.

[0012] In some embodiments of this disclosure, based on the foregoing scheme, the recess includes a first segment and a second segment sequentially connected along the axial direction of the rotating shaft; the distance between the first segment and the outer peripheral side of the rotating shaft in the radial direction of the rotating shaft is less than the distance between the second segment and the outer peripheral side of the rotating shaft.

[0013] In this embodiment, by designing the recessed portion as a first segment and a second segment connected sequentially along the axial direction of the shaft, and ensuring that the radial distance between the first segment and the outer periphery of the shaft is less than the radial distance between the second segment and the outer periphery of the shaft, a stepped, non-uniform thickness gap layout can be formed on the side of the magnet near the shaft. On the one hand, the smaller gap and higher stiffness of the filling area near the first segment helps ensure the positioning accuracy and concentricity of the magnet and the shaft in the critical support area. On the other hand, the larger gap and more sufficient deformation margin of the filling area near the second segment helps the filling material to fully fill and absorb the deformation caused by thermal expansion and contraction and centrifugal loads, reducing interface stress concentration. At the same time, the stepped contour forms a kind of "mechanical locking" constraint on the filling portion in the axial and radial directions, improving the shear resistance and anti-slip capability of the filling material and the magnet, thereby further improving the mechanical reliability and fatigue resistance of the rotor assembly under high-speed conditions.

[0014] According to a first aspect of the embodiments of this specification, a processing apparatus for a rotor magnet fixing structure is provided, applied to the permanent magnet motor rotor magnet fixing structure. The processing apparatus includes: a processing bracket; a clamping mechanism disposed on the processing bracket for positioning the rotating shaft in its axial direction and configured to drive the rotating shaft to rotate about its axis; a coating mechanism including at least two winding brackets and a winding assembly disposed on the winding brackets, the winding brackets being movable along the length direction of the processing bracket; wherein the winding assembly disposed on one of the winding brackets is used to wind a first fastening layer on the outer periphery of the magnet; the winding assembly disposed on another winding bracket is used to wind a second fastening layer on the outer periphery of the magnet; and a coating mechanism having multiple components connected to the winding brackets, wherein some of the coating mechanisms are used to coat an adhesive layer on the magnet; and the remaining coating mechanisms coat an adhesive layer on the outer surface of the first fastening layer.

[0015] In this embodiment, when processing the rotor magnet fixing structure, the rotating shaft with the assembled magnet is first installed on the clamping mechanism on the processing bracket. The clamping mechanism positions the rotating shaft axially and drives it to rotate continuously around its axis. Subsequently, at least two winding brackets in the coating mechanism reciprocate along the length of the processing bracket: the winding assembly on one winding bracket moves axially and, in coordination with the rotation of the rotating shaft, continuously and uniformly winds the first fastening layer around the outer periphery of the magnet; a portion of the coating mechanism connected to it moves synchronously with the winding bracket and pre- or synchronously coats an adhesive layer on the outer periphery of the magnet. After the first fastening layer is coated, the winding assembly on the other winding bracket, also moving axially and rotating in coordination with the rotating shaft, winds the second fastening layer around the outer periphery of the already formed first fastening layer; the remaining coating mechanism connected to it coats the outer surface of the first fastening layer with an adhesive layer, so that the second fastening layer fully adheres to the adhesive layer during the winding process, ultimately completing the multi-layer coating and fixing of the magnet.

[0016] Through the coordinated movement of the aforementioned processing devices, the first and second fastening layers can be automatically and continuously wrapped around the magnets by the continuous rotation of the rotating shaft and the axial reciprocating motion of the winding bracket, significantly improving the uniformity of the wrapping and the consistency of the preload. Multiple coating mechanisms are respectively bound to different winding brackets, allowing the adhesive layer to be applied at specific points and in specific quantities on the magnet surface and the outer surface of the first fastening layer according to process requirements. This ensures the bonding strength between the fastening layer and the magnet, and between the fastening layers themselves, while reducing excess coating and human error, thus facilitating the formation of a dense, stress-uniformly distributed multi-layer fastening system. The coating mechanisms are configured in multiple groups, when... When the winding bracket moves to one side, the coating mechanism on the corresponding side can apply an adhesive layer to the magnet or first fastening layer surface of the workpiece on that side before winding. After the workpiece on that side is processed, the winding bracket moves to the other side, and the coating mechanism on that side can also complete the coating before winding. This allows for alternating operation between the workpieces on both sides, reducing standby and idle travel time, and enabling uninterrupted processing of multiple workpieces. This further improves the mechanical strength, fatigue resistance, and product consistency of the rotor magnet fixing structure, and significantly enhances overall processing efficiency and equipment utilization. It is suitable for mass production applications of high-speed, high-power permanent magnet motor rotors.

[0017] In some embodiments of this disclosure, based on the foregoing scheme, the winding assembly includes: a rotating ring rotatably connected to the winding support, wherein the winding support has a first channel; the rotating ring has a second channel, the first channel and the second channel being connected in communication; a winding roller disposed on the rotating ring; and a driving member configured to drive the rotating ring to rotate, thereby causing the winding roller on the rotating ring to rotate, and thus causing the material on the winding roller to be coated on the magnet and / or the outer periphery of the first fastening layer.

[0018] In this embodiment, during processing, the rotating ring in the winding assembly is rotatably connected to the winding bracket. Material (such as the strip material of the first or second fastening layer) enters through the first channel on the winding bracket and is guided to the winding roller through the second channel of the rotating ring connected thereto. When the drive unit operates, it drives the rotating ring to rotate around its axis, causing the winding roller mounted on the rotating ring to move together with the rotating ring and rotate around the axis. During rotation, the winding roller continuously and evenly covers the outer periphery of the magnet and / or the outer periphery of the already formed first fastening layer with the material it carries, thereby achieving circumferential winding and covering of the magnet or the first fastening layer.

[0019] By setting up a rotating ring with a first channel and a second channel, the material can be stably and controllably guided and cooperate with the winding roller before entering the winding area. With the drive component driving the rotating ring to rotate, the winding roller can achieve continuous and uniform wrapping as it rotates around the magnet or the first fastening layer. This not only helps to improve the density of the winding layer and the consistency of the preload, and reduce defects such as uneven winding and wrinkles caused by manual operation, but also facilitates the adjustment of the material direction and winding trajectory. This improves the fit between the fastening layer and the magnet, as well as the overall mechanical strength, and helps to improve the reliability and processing efficiency of the rotor magnet fixing structure.

[0020] In some embodiments of this disclosure, based on the foregoing scheme, the driving component includes: a driving pulley rotatably connected to the winding bracket; at least one driven pulley and a belt, the driven pulley being rotatably connected to one side of the winding bracket, the driving pulley and the driven pulley being connected via the belt; a plurality of drive wheels, respectively connected to the driving pulley and the driven pulley, disposed on the other side of the winding bracket, the plurality of drive wheels abutting against the outer periphery of the rotating ring; and a drive motor configured to drive the driving pulley to rotate.

[0021] In this embodiment, when the drive unit is working, the drive motor outputs torque and drives the driving pulley to rotate around its axis. The driving pulley transmits power to at least one driven pulley via a belt, forming a synchronously rotating transmission group. Multiple drive wheels, respectively connected to the driving and driven pulleys, rotate simultaneously under the drive of this transmission group and are arranged on the other side of the winding bracket, abutting against the outer periphery of the rotating ring. Thus, through frictional transmission between the multiple drive wheels and the outer periphery of the rotating ring, the rotation is driven to rotate smoothly around its central axis, achieving continuous drive of the winding roller in the winding assembly.

[0022] This configuration offers several advantages. First, it utilizes belt pulley transmission to flexibly match output speed and torque, resulting in smooth transmission, low noise, and easy adjustment of the winding speed according to process requirements. Second, multiple drive wheels are arranged on the other side of the winding bracket, abutting against the outer circumference of the rotating ring. This allows for the uniform application of driving force and radial support force to the rotating ring at multiple contact points, reducing local slippage and uneven loading, ensuring smooth rotation and high coaxiality of the rotating ring, and improving the uniformity and repeatability of the fastening layer wrapping during the winding process. Furthermore, the drive components are arranged on both sides of the winding bracket, resulting in a compact structure, convenient maintenance, and suitability for stable operation of the winding mechanism under long-term continuous working conditions.

[0023] In some embodiments of this disclosure, based on the foregoing scheme, the driving component further includes: a limiting roller, located on the same side of the winding bracket as the rotating ring; the limiting roller includes a connecting portion and a limiting portion; the connecting portion is used to connect the limiting portion to the winding bracket; a limiting groove is provided on the outer peripheral surface of the limiting portion along its circumferential direction; the limiting groove cooperates with the outer peripheral side of the rotating ring to limit and guide its radial position during the rotation of the rotating ring.

[0024] In this embodiment, when the winding assembly is working, the rotating ring rotates around its central axis under the drive of the driving component, and its outer peripheral side is always positioned opposite to the limiting part of the limiting roller. The outer peripheral surface of the limiting part is provided with a limiting groove along the circumferential direction. The outer peripheral side of the rotating ring is guided and partially embedded in the limiting groove, so that the rotating ring can rotate freely along the circumferential direction during rotation, while being constrained and guided radially by the limiting groove, thereby maintaining a basically constant radial position and a predetermined motion trajectory on the winding support.

[0025] By setting a limiting roller including a connecting part and a limiting part on the same side of the winding bracket, and forming a limiting groove on the outer circumferential surface of the limiting part that matches the outer circumferential side of the rotating ring, the radial position of the rotating ring can be effectively limited and guided without affecting its circumferential rotation. On the one hand, this suppresses the radial runout and shaking of the rotating ring when it is running at high speed, ensures stable contact between the rotating ring and the drive wheel, and reduces slippage and local wear. On the other hand, it improves the concentricity and motion stability of the winding roller during the winding process, which is conducive to achieving uniformity and repeatability of the fastening layer wrapping, reducing vibration and noise, and improving the overall reliability of the drive assembly and winding process.

[0026] In some embodiments of this disclosure, based on the foregoing scheme, the coating mechanism includes: a coating support connected to the winding support and moving synchronously with the winding support; a material cylinder disposed on the coating support for containing adhesive material; a coating roller rotatably connected to the coating support; a coating pipe, one end of which extends into the material cylinder and the other end of which extends into and communicates with the internal flow channel of the coating roller; a pressure member disposed on the coating pipe for conveying the adhesive material in the material cylinder to the coating roller through the coating pipe under pressure; and a pushing member for driving the coating roller toward or away from the magnet and / or the first fastening layer.

[0027] In this embodiment, during processing, the coating support and the winding support are connected and move synchronously. When the winding support reciprocates along the length of the processing support, driving the magnet or the rotor area with the first fastening layer already wound into the coating station, the adhesive material pre-loaded in the material cylinder is continuously transported to the internal flow channel of the coating roller through the coating pipe under the pressure of the pressurizing component, and evenly overflows from the surface of the coating roller. The pushing component drives the coating roller toward the magnet and / or the first fastening layer according to process requirements, so that the coating roller continuously and evenly coats the adhesive material on the target surface while contacting the outer surface of the magnet or the first fastening layer and rotating with the shaft and moving synchronously with the coating support. When coating is not required or the coating area needs to be adjusted, the pushing component moves the coating roller away from the magnet and / or the first fastening layer, thereby stopping or reducing coating, realizing the start and stop of the coating process and gap control.

[0028] The aforementioned coating mechanism allows the adhesive material to be quantitatively and continuously conveyed from the material cylinder through the coating pipe to the coating roller under pressure. Under the adjustment of the pushing component, the coating roller makes line or surface contact with the magnet and / or the first fastening layer, achieving synchronous and uniform arrangement of the adhesive layer in both the axial and circumferential directions. This significantly reduces problems such as uneven thickness, missed areas, or over-coating caused by manual brushing, improving the consistency of the adhesive layer thickness and coverage. This ensures the bonding strength and overall stress uniformity between the first and second fastening layers and the magnet. Simultaneously, the coating and winding supports move synchronously, coordinating the coating and winding processes within the same step, improving processing efficiency, reducing station changes and clamping times, and ultimately enhancing the finished product quality and production stability of the rotor magnet fixing structure.

[0029] In some embodiments of this disclosure, based on the foregoing scheme, the clamping mechanism includes: a fixed frame having an installation space for the rotating shaft; a clamping assembly disposed on the fixed frame and configured to fix the rotating shaft in its axial direction; and a power assembly connected to the clamping assembly and configured to drive the clamping assembly to rotate the rotating shaft relative to the fixed frame about its axis.

[0030] In this embodiment, during processing, the shaft to be processed is placed into the mounting space on the fixed frame, and the clamping assembly clamps both ends or designated clamping points along the shaft's axial direction, thereby positioning and fixing the shaft axially. Subsequently, the power assembly is activated, driving the clamping assembly to rotate as a whole through a transmission connection with the clamping assembly. While maintaining a firm grip on the shaft, the clamping assembly drives the shaft to rotate continuously around its own axis relative to the fixed frame, providing stable rotational motion for subsequent wrapping and coating operations in the circumferential direction of the shaft, such as the winding mechanism and the coating mechanism.

[0031] By providing dedicated installation space through a fixed frame and using clamping components to axially position the shaft, the stability of the shaft's position and the reliability of its clamping during processing are ensured. The power unit directly drives the clamping components, thereby rotating the shaft around its axis with the clamping components as a reference. This helps ensure the concentricity and speed stability of the shaft's rotation, reduces eccentricity and oscillation, and improves the uniformity and consistency of winding, coating, and other processes in the circumferential direction. At the same time, this clamping mechanism has a relatively simple structure and a high degree of integration between clamping and driving, facilitating the clamping and quick replacement of shafts of different specifications, thus contributing to improved processing efficiency and quality.

[0032] The technical solutions provided by the embodiments of this specification may include the following beneficial effects: 1. By sequentially setting a first fastening layer, an insulating adhesive layer, and a second fastening layer with higher tensile strength on the outer periphery of the magnet, the magnet can withstand centrifugal force through a multi-layer structure under high-speed and high-power conditions, which significantly improves the fixing strength and anti-spinning ability of the magnet; the insulating adhesive layer, on the one hand, realizes reliable bonding of the two fastening structures and uniformly transfers the load, and on the other hand, blocks the conductive path, suppresses eddy currents and heat generation, which is beneficial to ensure mechanical safety while taking into account motor efficiency and operational stability.

[0033] 2. By setting a stepped recess on the side of the magnet near the shaft and a filling part between the recess and the shaft, and limiting the radial thickness of the magnetic isolation bridge to 2.5mm to 3.0mm, the surface contact support and mechanical locking between the magnet and the shaft are achieved. While ensuring that the magnetic isolation bridge and the filling part have sufficient mechanical strength and fatigue resistance, the magnetic circuit reluctance and effective magnetic flux are also taken into account, reducing stress concentration and loosening risk, so that the rotor can obtain better mechanical reliability and electromagnetic performance under high speed conditions.

[0034] 3. By integrating a clamping mechanism, at least two sets of reciprocating winding supports, and multiple sets of coating mechanisms that move synchronously with them on the same processing support, while the winding support on one side completes the winding and wrapping of the first and second fastening layers and the coating of the adhesive layer under the condition of the drive shaft rotating, the coating mechanism on the other side can pre-coat the surface of another workpiece, realizing the alternating processing of workpieces on both sides and the synchronous operation of winding and coating. This not only significantly improves the uniformity of wrapping and product consistency, but also reduces idle time and waiting time, improves processing efficiency and equipment utilization, and is suitable for the mass production of high-speed, high-power permanent magnet motor rotors.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0037] Figure 1 is a schematic diagram of the fixed structure, magnet and rotating shaft in the embodiment of this disclosure.

[0038] Figure 2 is a schematic diagram of the processing device with a fixed structure in an embodiment of this disclosure.

[0039] Figure 3 is a schematic diagram of the fixed-structure processing device from another perspective in an embodiment of this disclosure.

[0040] Figure 4 is an enlarged view of part A in Figure 3.

[0041] Figure 5 is a schematic diagram of the fixing structure in an embodiment of this disclosure.

[0042] Figure 6 is an enlarged view of part B in Figure 5.

[0043] Figure 7 is an enlarged view of section C in Figure 5.

[0044] Figure 8 is a schematic diagram of the fixed structure from another perspective in an embodiment of this disclosure.

[0045] Figure 9 is an enlarged view of part D in Figure 8.

[0046] Figure 10 is a partial structural schematic diagram of the processing apparatus in an embodiment of this disclosure.

[0047] Figure 11 is an enlarged view of part E in Figure 10.

[0048] Explanation of reference numerals in the attached drawings: 1. Rotating shaft; 11. Magnet; 111. Recessed portion; 1111. First section; 1112. Second section; 13. Magnetic bridge; 2. Fixing structure; 21. First fastening layer; 22. Second fastening layer; 23. Adhesive layer; 24. Filling portion; 3. Processing bracket; 4. Clamping mechanism; 41. Fixed frame; 42. Clamping assembly; 421. Rotating plate; 422. Clamping block; 423. Return spring; 43. Power assembly; 431. Power motor; 432. Transmission component; 5. Covering mechanism; 5 1. Winding bracket; 52. Winding assembly; 521. Rotating ring; 522. Winding roller; 523. Driving component; 5231. Driving pulley; 5232. Driven pulley; 5233. Belt; 5234. Drive wheel; 5235. Drive motor; 5236. Limiting roller; 52361. Connecting part; 52362. Limiting part; 52363. Limiting groove; 6. Coating mechanism; 61. Coating bracket; 62. Material cylinder; 63. Coating roller; 64. Coating pipe; 65. Pressurizing component; 66. Pushing component. Detailed Implementation

[0049] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this specification as detailed in the appended claims.

[0050] The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” as used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0051] It should be understood that although the terms first, second, third, etc., may be used in this specification to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this specification, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0052] The first aspect of this application provides a permanent magnet motor rotor magnet fixing structure for fixing a plurality of magnets 11 to the rotating shaft 1 of the permanent magnet motor; referring to FIG1, the plurality of magnets 11 are sleeved on the outer periphery of the rotating shaft 1, and a magnetic isolation bridge 13 is provided between adjacent magnets 11. The fixing structure 2 includes a first fastening layer 21, a second fastening layer 22, and an adhesive layer 23; the adhesive layer 23 is at least partially disposed between the outer peripheral surface of the plurality of magnets 11 and the first fastening layer 21, and at least partially disposed on the outer surface of the first fastening layer 21 away from the plurality of magnets 11; the first fastening layer 21 is arranged around the circumference of the rotating shaft 1 and is attached to the outer peripheral surface of the plurality of magnets 11 via the adhesive layer 23; the second fastening layer 22 is arranged around the circumference of the rotating shaft 1 outside the adhesive layer 23 and is attached to the adhesive layer 23; wherein, the tensile strength of the second fastening layer 22 is greater than the tensile strength of the first fastening layer 21, and the adhesive layer 23 is made of insulating material.

[0053] In a preferred embodiment, referring to Figure 1, the first fastening layer 21 is formed of a non-woven tape. Specifically, the non-woven tape is wrapped around the outer circumference of the magnet 11 along the axis of rotation 1, and a pre-tightening force is applied during the wrapping process to provide basic circumferential constraint on the magnet 11. The second fastening layer 22 is formed of carbon fiber cloth, which continues to wrap around the outer circumference of the first fastening layer 21 and its outer adhesive layer 23. The tensile strength of the carbon fiber cloth is higher than that of the non-woven tape, and it is used to bear the main circumferential tensile stress. The adhesive layer 23 is made of an adhesive insulating varnish, which is applied and cured in multiple layers between the magnet 11 and the first fastening layer 21 and between the first fastening layer 21 and the second fastening layer 22, so that the non-woven tape, carbon fiber cloth and magnet 11 are bonded together as a whole, thereby meeting the insulation requirements of the adhesive layer 23 and further improving the overall strength and fatigue life of the multi-layer fastening structure.

[0054] In other embodiments, referring to Figure 1, the materials of the first fastening layer 21, the second fastening layer 22, and the adhesive layer 23 are not limited to non-woven tape, carbon fiber cloth, and the aforementioned insulating varnish. For example, the first fastening layer 21 can also be made of flexible fiber tape such as glass fiber tape or polyester fiber tape, the second fastening layer 22 can be made of other carbon fiber composite tape or metal tape with higher tensile strength than the first fastening layer 21, and the adhesive layer 23 can be made of other epoxy, acrylic, or silicone rubber adhesive materials with insulating properties. As long as the requirements that the adhesive layer 23 is an insulating material and the tensile strength of the second fastening layer 22 is greater than the tensile strength of the first fastening layer 21 are met, they should all be considered to fall within the protection scope of this application.

[0055] In some embodiments of this disclosure, referring to FIG1, the thickness of the magnetic isolation bridge 13 between adjacent magnets 11 in the radial direction along the rotating shaft 1 is limited to the range of 2.5mm to 3.0mm. This ensures that the magnetic isolation bridge 13 has sufficient mechanical strength and rigidity under high-speed and high-power conditions, so as to reliably withstand the centrifugal force and electromagnetic load generated by the magnets 11 and the rotor, without significantly increasing the magnetic circuit reluctance or weakening the effective air gap magnetic flux density due to excessive size. This achieves a more reasonable balance between mechanical performance and electromagnetic performance, which is beneficial to improving the output performance and operating stability of the permanent magnet motor.

[0056] In some specific embodiments, referring to Figure 1, the radial thickness of the magnetic bridge 13 can be further optimized within the above range, for example, preferably about 2.7 mm or 2.8 mm, to match the design parameters such as the rated speed, number of pole pairs, and size of the magnet 11 of the target motor. Through finite element simulation and prototype testing, it is verified that the stress level of the magnetic bridge 13 within this thickness range is lower than the allowable stress of the material, and the air gap magnetic flux density waveform and electromagnetic efficiency can meet the design specifications, thereby providing better comprehensive performance for high-speed, high-power permanent magnet motors.

[0057] If the radial thickness of the magnetic bridge 13 is less than 2.5 mm, the safety margin of the magnetic bridge 13 under high-speed rotation and repeated start-stop impact loads will be reduced. It is easy for the magnetic bridge 13 to crack, plastically deform or even fail due to local stress concentration. There is a risk that the magnet 11 will loosen or be thrown out, which is not conducive to ensuring the long-term reliable operation of the rotor. If the radial thickness of the magnetic bridge 13 is greater than 3.0 mm, the non-magnetic or weakly magnetic sections in the magnetic circuit will increase significantly, the magnetic reluctance of the magnetic circuit will increase, and the effective air gap magnetic flux density will decrease. It may be necessary to increase the amount of magnet 11 or adjust the electromagnetic design to compensate for this, thereby increasing material costs and losses, which is not conducive to improving motor efficiency and power density.

[0058] In some embodiments of this disclosure, referring to FIG1, a recessed portion 111 is provided on the side of the magnet 11 near the rotating shaft 1, forming a gap between the recessed portion 111 and the outer periphery of the rotating shaft 1. A filling portion 24 is provided in the gap, which introduces a filling transition structure between the magnet 11 and the rotating shaft 1. On the one hand, the recessed portion 111 and the filling portion 24 increase the actual meshing shape and contact range between the magnet 11 and the rotating shaft 1, which is beneficial to improve the support and constraint capacity of the magnet 11 relative to the rotating shaft 1, reduce the shaking and displacement of the magnet 11 under high-speed operation, and prevent loosening or even being thrown out. On the other hand, the filling portion 24 can be made of a material with a certain elasticity or toughness, which plays a buffering and stress equalization role between the magnet 11 and the rotating shaft 1, reduces local stress concentration, improves the fatigue resistance and long-term operational reliability of the rotor structure, and can also take into account additional functions such as insulation, corrosion protection or heat conduction as needed.

[0059] In one specific embodiment, referring to Figure 1, the recess 111 includes a first segment 1111 and a second segment 1112 connected sequentially along the axial direction of the rotating shaft 1. The distance between the first segment 1111 and the outer periphery of the rotating shaft 1 in the radial direction is less than the distance between the second segment 1112 and the outer periphery of the rotating shaft 1. That is, a thinner gap region is formed near the first segment 1111, and a thicker gap region is formed near the second segment 1112. Correspondingly, the filling portion 24 has a smaller thickness and higher rigidity in the first segment 1111 region, which helps ensure the positioning accuracy and concentricity of the magnet 11 in the critical support area; and a larger thickness and more sufficient deformation margin in the second segment 1112 region, which helps absorb deformation caused by thermal expansion and contraction and centrifugal loads, reducing interface stress concentration. Meanwhile, the stepped contour formed by the first segment 1111 and the second segment 1112 creates a constraint effect similar to "mechanical locking" on the filling part 24 in the axial and radial directions, which can improve the shear resistance and anti-slip capability of the filling material and the magnet 11, thereby further improving the mechanical reliability of the rotor assembly under high speed conditions.

[0060] It should be noted that the specific structural form of the recess 111 is not limited to the stepped shape composed of the first segment 1111 and the second segment 1112. In other embodiments, the recess 111 can be a continuous arc-shaped groove, a sloped transition groove, a multi-segment stepped combination structure, or other recessed contours that can form gaps and accommodate the filling part 24. As long as it can achieve the technical effects of improving the support and constraint capacity between the magnet 11 and the rotating shaft 1, improving stress distribution, and / or facilitating the reliable arrangement of the filling material, it should be considered to fall within the protection scope of this application.

[0061] Referring to Figures 3 and 4, a second aspect of this application provides a processing apparatus for fixing a rotor magnet. In one embodiment, the processing apparatus includes a processing support 3, a clamping mechanism 4, and a covering mechanism 5. The clamping mechanism 4 is mounted on the processing support 3 and is used to position the rotating shaft 1 to be processed axially, and to reliably fix the rotating shaft 1 by clamping it with both ends of the rotating shaft 1 or a preset clamping position; at the same time, the clamping mechanism 4 is also configured to drive the rotating shaft 1 to rotate around its axis, for example, by driving the clamping structure to rotate through a built-in power component 43, thereby providing a stable rotational motion state for the rotating shaft 1 during processing. Through the above settings, the axial position and rotational concentricity of the rotating shaft 1 during processing can be guaranteed, which is beneficial to the uniformity and consistency of the subsequent covering process in the circumferential direction.

[0062] In this embodiment, referring to Figures 2, 3, and 10, the covering mechanism 5 includes at least two winding supports 51 and winding components 52 disposed on the winding supports 51. Multiple winding supports 51 are arranged along the length direction of the processing support 3 and are capable of reciprocating relative to the processing support 3 along this length direction. The winding component 52 disposed on one winding support 51 is used to wrap the exposed outer periphery of the magnet 11 with a first fastening layer 21 in conjunction with the rotation of the rotating shaft 1. Specifically, when the winding support 51 moves along the length direction of the processing support 3, the winding component 52 guides the strip material of the first fastening layer 21 to the outer periphery of the magnet 11, and with the continuous rotation of the rotating shaft 1, continuously and uniformly wraps the first fastening layer 21 around the outer surface of the magnet 11, achieving primary circumferential reinforcement of the magnet 11. The winding assembly 52 on the other winding bracket 51 is set to be independent of the winding bracket 51 and can be controlled separately. It is used to continue winding the second fastening layer 22 on the outer periphery of the magnet 11 (where the first fastening layer 21 has been formed) after the first fastening layer 21 has been completed, so that the second fastening layer 22 covers the outside of the first fastening layer 21, thereby forming a double-layer fastening structure.

[0063] To achieve synchronous engagement between the adhesive layer 23 and the fastening layer, as shown in Figures 2 and 3, multiple coating mechanisms 6 are provided, each connected to a different winding support 51, enabling them to move synchronously with the corresponding winding support 51. Some coating mechanisms 6 are located near the winding support 51 used for winding the first fastening layer 21, and are configured to coat the outer surface of the magnet 11 with the adhesive layer 23 before or during winding of the first fastening layer 21, so that the first fastening layer 21 directly adheres to the outer surface of the magnet 11 with the adhesive layer 23 during winding. The remaining coating mechanisms 6 are located near the winding support 51 used for winding the second fastening layer 22, and are used to coat the outer surface of the first fastening layer 21 with the adhesive layer 23 to a predetermined thickness after the first fastening layer 21 is formed, so that the second fastening layer 22 fully adheres to the adhesive layer 23 during subsequent winding. With the above arrangement, the adhesive layer 23 can be precisely formed between the magnet 11 and the first fastening layer 21, and between the first fastening layer 21 and the second fastening layer 22, according to the process requirements. This enables a continuous process of "coating-winding" under automated processing conditions, which not only ensures that the distribution and thickness of the adhesive layer 23 are controllable, but also helps to improve the overall bonding strength and processing efficiency of the multi-layer fastening structure.

[0064] In one embodiment, referring to FIG10, the winding assembly 52 includes a rotating ring 521, a winding roller 522, and a drive member 523. The rotating ring 521 is rotatably connected to the winding support 51. The winding support 51 has a first channel for guiding strip material, and the rotating ring 521 has a second channel corresponding to the first channel. The first channel and the second channel are connected to each other so as to smoothly guide strip material (e.g., strip material for forming the first fastening layer 21 or the second fastening layer 22) from the outside of the winding support 51 into the interior of the rotating ring 521 or its peripheral area. The winding roller 522 is disposed on the rotating ring 521 and can be a roller structure coaxially or eccentrically arranged with the rotating ring 521. After being guided by the first channel and the second channel, the strip material is wound around or pressed against the outer periphery of the winding roller 522, so that the winding roller 522 can carry and pull the material into the coverage area of ​​the magnet 11 or the first fastening layer 21 when the rotating ring 521 rotates.

[0065] The drive member 523 is connected to the rotating ring 521 and is configured to drive the rotating ring 521 to rotate around its axis. For example, the drive member 523 can be connected to the outer periphery or mating part of the rotating ring 521 by means of gears, pulleys or friction wheels. When the drive member 523 is working, it drives the rotating ring 521 to rotate continuously, thereby causing the winding roller 522 provided on the rotating ring 521 to rotate synchronously with the rotating ring 521. During the processing, with the rotating shaft 1 driven to rotate by the clamping mechanism 4, the winding assembly 52 introduces the strip material through the first channel and the second channel and winds it onto the winding roller 522. As the rotating ring 521 rotates under the action of the driving member 523, the winding roller 522 rolls around its own axis on the one hand, and revolves around the rotating shaft 1 with the rotating ring 521 on the other hand. When the winding roller 522 is in contact with the outer peripheral surface of the magnet 11 and / or the outer peripheral side of the first fastening layer 21, it continuously and uniformly coats the material carried on its outer periphery onto the surface of the magnet 11 or the outer peripheral side of the first fastening layer 21, thereby achieving circumferential winding and coating of the magnet 11 or the first fastening layer 21, which is beneficial to improving the density and thickness uniformity of the wrapping layer.

[0066] As an example, the drive unit 523 includes a drive pulley 5231, at least one driven pulley 5232, a belt 5233, a plurality of drive wheels 5234, and a drive motor 5235. The drive pulley 5231 is rotatably connected to the winding bracket 51. The output shaft of the drive motor 5235 is fixedly connected to the drive pulley 5231 or driven by a reduction gear. When the drive motor 5235 is working, it drives the drive pulley 5231 to rotate about its axis. At least one driven pulley 5232 is rotatably connected to one side of the winding bracket 51. The drive pulley 5231 and the driven pulley 5232 are connected by a belt 5233, forming a closed belt 5233 transmission circuit, so as to transmit the torque of the drive motor 5235 from the drive pulley 5231 to the driven pulley 5232.

[0067] On the other side of the winding bracket 51, multiple drive wheels 5234 are provided. These multiple drive wheels 5234 are respectively connected to the driving pulley 5231 and the driven pulley 5232, for example, by being coaxially arranged or sharing a rotating shaft 1, so that the multiple drive wheels 5234 rotate synchronously under the drive of the driving pulley 5231 and the driven pulley 5232. The multiple drive wheels 5234 are arranged close to the rotating ring 521, and their outer circumferences are pressed against the outer circumferences of the rotating ring 521. When the drive motor 5235 drives the driving pulley 5231 to rotate, the multiple drive wheels 5234 are driven to rotate synchronously via the belt 5233 and the driven pulley 5232. Through frictional contact with the outer circumferences of the rotating ring 521, the multiple drive wheels 5234 drive the rotating ring 521 to rotate smoothly around its central axis, thereby achieving reliable drive of the rotating ring 521 in the winding assembly 52.

[0068] In some embodiments, referring to Figures 4 and 10, the driving component 523 may further include a limiting roller 5236. The limiting roller 5236 is located on the same side of the winding bracket 51 as the rotating ring 521, and is used to limit and guide the radial position of the rotating ring 521 during the rotation driven by multiple driving wheels 5234. The limiting roller 5236 includes a connecting part 52361 and a limiting part 52362. The connecting part 52361 is used to reliably install the limiting part 52362 on the winding bracket 51. For example, the connecting part 52361 can be a fixed seat, a connecting plate, or a support arm structure. One end of it is fixedly connected to the winding bracket 51 by screws, pins, or welding, and the other end is integrally or detachably connected to the limiting part 52362, thereby ensuring the accurate position of the limiting part 52362 relative to the winding bracket 51 while facilitating assembly and maintenance. The limiting part 52362 is configured as a roller or columnar member that can approach the outer periphery of the rotating ring 521. Its outer peripheral surface forms a limiting groove 52363 in the circumferential direction. The limiting groove 52363 is used to cooperate with the outer peripheral side of the rotating ring 521. The outer peripheral edge of the rotating ring 521 can be partially embedded in the limiting groove 52363 or abut against the groove side of the limiting groove 52363.

[0069] In actual operation, when the drive motor 5235 drives the rotating ring 521 to rotate via the belt 5233 and multiple drive wheels 5234, the rotating ring 521 rotates around its central axis under the frictional drive of the drive wheels 5234, and is constrained in the radial direction by the outer peripheral limiting groove 52363 of the limiting part 52362. The limiting groove 52363 forms circumferential guidance and radial limitation on the outer periphery of the rotating ring 521, so that the rotating ring 521 can maintain free circumferential rotation during rotation, and avoids obvious radial runout, wobble or displacement deviation due to uneven force or vibration. This makes the contact between the drive wheel 5234 and the rotating ring 521 more stable, reducing slippage and local wear. With the above-mentioned structural configuration, the limiting roller 5236 and the rotating ring 521 work together to improve the motion stability and positioning accuracy of the winding assembly 52 during long-term continuous operation, and ensure that the winding roller 522 maintains a relatively stable geometric position when wrapping the magnet 11 or the first fastening layer 21, thereby further improving the uniformity of the fastening layer winding and the consistency of the product.

[0070] In one embodiment, referring to FIG11, the coating mechanism 6 includes a coating bracket 61, a material cylinder 62, a coating roller 63, a coating channel 64, a pressure member 65, and a pusher 66. The coating bracket 61 is fixed to the winding bracket 51 by a connector, allowing the coating bracket 61 to reciprocate along the length of the processing bracket 3 together with the winding bracket 51, thereby maintaining axial synchronization with the winding station. When the winding bracket 51 moves to the area above the magnet 11 to be processed or the area where the first fastening layer 21 has been formed, the coating bracket 61 also reaches the corresponding position, and the coating roller 63 is thus arranged in a position adjacent to the outer periphery of the magnet 11 and / or the outer periphery of the first fastening layer 21. The material cylinder 62 is mounted on the coating bracket 61 for pre-containing the adhesive material. One end of the coating channel 64 extends into the interior of the material cylinder 62, and the other end extends into and communicates with the internal flow channel of the coating roller 63.

[0071] In the specific working process, pressure is first applied to the coating pipe 64 by the pressure-applying component 65. For example, the pressure-applying component 65 can be a manual screw clamping structure, an elastic extrusion structure, or a small pneumatic / hydraulic drive assembly installed on the coating pipe 64. Under pressure, the adhesive material in the material cylinder 62 is extruded and conveyed along the coating pipe 64 to the internal flow channel of the coating roller 63, and slowly and evenly overflows from the circumferential opening or micropores of the coating roller 63. Subsequently, the pushing component 66 operates according to process requirements, driving the coating roller 63 to move towards the magnet 11 and / or the first fastening layer 21, so that the outer peripheral side of the coating roller 63 establishes line contact or surface contact with the outer peripheral surface of the magnet 11 or the outer surface of the first fastening layer 21. While the rotating shaft 1 is driven by the clamping mechanism 4 to rotate around its axis, the winding bracket 51 and the coating bracket 61 move synchronously along the length of the processing bracket 3. Under their combined action, the coating roller 63 is driven by the workpiece surface to rotate on its own, and on the other hand, it moves axially reciprocating with the coating bracket 61, thereby continuously and uniformly coating the adhesive material overflowing from the surface of the coating roller 63 onto the outer peripheral surface of the magnet 11 or the outer surface of the first fastening layer 21. When a certain processing area is coated, the pusher 66 can control the coating roller 63 to move away from the workpiece surface and withdraw from contact, so as to avoid the unwanted areas being coated.

[0072] Furthermore, in different embodiments, the pressure member 65 can be designed in various forms according to the viscosity, curing characteristics, and required coating thickness of the adhesive material. For example, it can adopt a spring-loaded extrusion structure, a threaded plunger structure, a miniature cylinder, or an electric push rod to achieve fine adjustment of the output flow and pressure of the adhesive material in the material cylinder 62, thereby controlling the thickness and uniformity of the adhesive layer 23. The pusher 66 can also adopt an eccentric cam, a slider-linkage mechanism, or a small cylinder / electric cylinder. By adjusting the stroke and limit position, the contact pressure and gap between the applicator roller 63 and the workpiece surface are kept within a suitable range, ensuring that the adhesive material can be fully transferred to the workpiece surface while avoiding damage to the magnet 11 or the surface of the first fastening layer 21. Furthermore, the surface shape and internal flow channel structure of the coating roller 63 can be optimized according to the width of the magnet 11, the width of the fastening layer, and the designed width of the adhesive layer 23. For example, it can be set as a roller shape with a slightly bulging center or a structure with guide ribs to match the target coating width and suppress edge sagging, thereby further improving the stability of the coating process and the forming quality of the adhesive layer 23.

[0073] In a preferred embodiment, referring to Figures 5, 6, 7, 8, and 9, the clamping mechanism 4 includes a fixed frame 41, a clamping assembly 42, and a power assembly 43. The fixed frame 41 has an installation space for accommodating the rotating shaft 1, extending along the length of the processing bracket 3, and defining the axial position of the rotating shaft 1. The clamping assembly 42 is disposed on the fixed frame 41 and configured to fix the rotating shaft 1 axially. The power assembly 43 is drively connected to the clamping assembly 42 and drives the clamping assembly 42 to rotate the rotating shaft 1 relative to the fixed frame 41 around its axis, thereby providing stable rotation conditions for the coating mechanism 5 and the coating mechanism 6 during processing.

[0074] Specifically, the clamping assembly 42 includes at least two opposing rotating plates 421 and clamping blocks 422 disposed on each rotating plate 421. The rotating plates 421 are rotatably mounted on the fixed frame 41, for example, supported by a rotating shaft 1 or a bearing assembly, allowing each rotating plate 421 to rotate around its respective mounting axis. Each rotating plate 421 is provided with at least two clamping blocks 422 arranged radially symmetrically along the rotating shaft 1. The clamping blocks 422 are preferably electromagnet structures, and their adjacent sides have grooves for clamping the rotating shaft 1. The cross-sectional shape of the grooves can be designed as semi-circular, V-shaped, or other mating shapes according to the outer contour of the rotating shaft 1. The clamping blocks 422 are slidably connected to the rotating plates 421, for example, through a sliding groove and guide pin or slider structure, allowing the clamping blocks 422 to move radially on the rotating plates 421 to clamp or release the rotating shaft 1 when electrically engaged or mechanically adjusted. When the electromagnet is energized, the clamping block 422 can move toward the rotating shaft 1 under the action of electromagnetic attraction and / or elastic element, and the groove fits with the outer circle of the rotating shaft 1, thereby forming a reliable clamping of the rotating shaft 1; when the electromagnet is de-energized, the clamping block 422 retracts under the action of elastic element or its own weight, which facilitates the clamping and disassembly of the rotating shaft 1.

[0075] The power assembly 43 includes a power motor 431 and a transmission component 432 connected to the output end of the power motor 431. In one embodiment, the power motor 431 is fixedly mounted on the fixed frame 41, and its output shaft is fixedly connected to a rotating plate 421 on one side or connected via a coupling or a reduction mechanism, so that when the power motor 431 is running, it drives the rotating plate 421 to rotate around its mounting axis. Since the clamping block 422 clamps the rotating shaft 1 through a groove, when the rotating plate 421 rotates, the clamping block 422 rotates synchronously with the rotating plate 421, thereby driving the rotating shaft 1 to rotate continuously relative to the fixed frame 41 around its own axis, providing a stable rotational drive for subsequent winding and coating of the rotor magnet 11 fixing structure 2.

[0076] Furthermore, in some embodiments, the rotating plates 421 on both sides have different functions: one rotating plate 421 is connected to the power motor 431 for driving the rotating shaft 1; the other rotating plate 421 is not connected to the power motor 431, but has a return spring 423 on its side away from the rotating shaft 1. One end of the return spring 423 is fixedly connected to the fixed frame 41 or support base, and the other end is connected to the rotating plate 421 on that side, so that the rotating plate 421 is in the default position under the elastic force of the return spring 423 when no external force is applied. When installing the rotating shaft 1, the operator first aligns one end of the rotating shaft 1 with the side of the rotating plate 421 equipped with the return spring 423. By pushing the rotating shaft 1 towards the rotating plate 421, the rotating plate 421 rotates slightly or shifts axially under the push of the rotating shaft 1, overcoming the elastic force of the return spring 423. The return spring 423 contracts accordingly, thus making room for the other end of the rotating shaft 1 to be inserted. Then, the other end of the rotating shaft 1 is inserted into the clamping area of ​​the other rotating plate 421 connected to the power motor 431, so that both ends of the rotating shaft 1 contact the clamping blocks 422 on both sides and are positioned in their respective grooves. After releasing the external force, the return spring 423 automatically pushes the rotating plate 421 on that side back to the predetermined position, so that the clamping blocks 422 on both rotating plates 421 together clamp and position the two ends or corresponding clamping sections of the rotating shaft 1. The above settings not only facilitate the clamping and alignment of the rotating shaft 1, reducing the amount of manual adjustment, but also maintain good coaxiality and clamping stability during the processing, providing a reliable guarantee for the high-precision and high-efficiency processing of the rotor magnet 11 fixing structure 2.

[0077] Other embodiments of this specification will readily occur to those skilled in the art upon consideration of the specification and practice of the invention claimed herein. This specification is intended to cover any variations, uses, or adaptations that follow the general principles of this specification and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this specification are indicated by the following claims.

[0078] It should be understood that this specification is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this specification is limited only by the appended claims.

[0079] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A permanent magnet motor rotor magnet fixing structure for fixing multiple magnets to the rotating shaft of the permanent magnet motor; the multiple magnets are sleeved on the outer periphery of the rotating shaft, and magnetic isolation bridges are provided between adjacent magnets; characterized in that, The fixing structure includes: a first fastening layer, which is arranged circumferentially around the axis of rotation and adheres to the outer peripheral surface of the plurality of magnets; an adhesive layer, which is at least partially disposed between the outer peripheral surface of the plurality of magnets and the first fastening layer, and at least partially disposed on the outer surface of the first fastening layer away from the plurality of magnets; and a second fastening layer, which is arranged circumferentially around the outside of the adhesive layer and adheres to the adhesive layer; wherein the tensile strength of the second fastening layer is greater than the tensile strength of the first fastening layer; and the adhesive layer is made of an insulating material.

2. The permanent magnet motor rotor magnet fixing structure according to claim 1, characterized in that: The thickness of the magnetic isolation bridge between adjacent magnets in the radial direction along the axis of rotation is between 2.5 mm and 3.0 mm.

3. The permanent magnet motor rotor magnet fixing structure according to claim 1, characterized in that: The magnet has a recess on the side near the rotating shaft; the recess forms a gap with the outer periphery of the rotating shaft; The permanent magnet motor rotor magnet fixing structure also includes a filling part, which is disposed in the gap.

4. The permanent magnet motor rotor magnet fixing structure according to claim 3, characterized in that: The recessed portion includes a first segment and a second segment that are sequentially connected along the axial direction of the rotating shaft; the distance between the first segment and the outer periphery of the rotating shaft in the radial direction is less than the distance between the second segment and the outer periphery of the rotating shaft.

5. A processing device for a rotor magnet fixing structure, applied to the permanent magnet motor rotor magnet fixing structure as described in any one of claims 1 to 4, characterized in that: The processing apparatus includes: a processing bracket; a clamping mechanism disposed on the processing bracket for positioning the rotating shaft in its axial direction and configured to drive the rotating shaft to rotate about its axis; a coating mechanism including at least two winding brackets and a winding assembly disposed on the winding brackets, the winding brackets being movable along the length direction of the processing bracket; wherein, the winding assembly disposed on one winding bracket is used to wind the first fastening layer on the outer periphery of the magnet; the winding assembly disposed on another winding bracket is used to wind the second fastening layer on the outer periphery of the magnet; and a coating mechanism having multiple components and connected to the winding brackets, wherein some of the coating mechanisms are used to coat an adhesive layer on the magnet; and the remaining coating mechanisms coat an adhesive layer on the outer surface of the first fastening layer.

6. The processing device for fixing the rotor magnet according to claim 5, characterized in that: The winding assembly includes: a rotating ring rotatably connected to the winding support, wherein the winding support has a first channel; the rotating ring has a second channel, the first channel and the second channel being connected in communication; a winding roller disposed on the rotating ring; and a driving member configured to drive the rotating ring to rotate, thereby causing the winding roller on the rotating ring to rotate, and thus causing the material on the winding roller to be coated on the magnet and / or the outer periphery of the first fastening layer.

7. The processing device for fixing the rotor magnet according to claim 6, characterized in that: The driving component includes: a driving pulley rotatably connected to the winding bracket; at least one driven pulley and a belt, the driven pulley being rotatably connected to one side of the winding bracket, the driving pulley and the driven pulley being connected via the belt; a plurality of drive wheels, respectively connected to the driving pulley and the driven pulley, located on the other side of the winding bracket, the plurality of drive wheels abutting against the outer periphery of the rotating ring; and a drive motor configured to drive the driving pulley to rotate.

8. The processing device for fixing the rotor magnet according to claim 7, characterized in that: The driving component further includes: a limiting roller, located on the same side of the winding bracket as the rotating ring; the limiting roller includes a connecting part and a limiting part; the connecting part is used to connect the limiting part to the winding bracket; a limiting groove is provided on the outer peripheral surface of the limiting part along its circumferential direction; the limiting groove cooperates with the outer peripheral side of the rotating ring to limit and guide its radial position during the rotation of the rotating ring.

9. The processing device for fixing the rotor magnet according to claim 5, characterized in that: The coating mechanism includes: a coating support connected to the winding support and moving synchronously with the winding support; a material cylinder disposed on the coating support for containing adhesive material; a coating roller rotatably connected to the coating support; a coating pipe, one end of which extends into the material cylinder and the other end of which extends into and communicates with the internal flow channel of the coating roller; a pressure member disposed on the coating pipe for conveying the adhesive material in the material cylinder to the coating roller under pressure; and a pushing member for driving the coating roller toward or away from the magnet and / or the first fastening layer.

10. The processing device for fixing the rotor magnet according to claim 5, characterized in that: The clamping mechanism includes: a fixed frame having an installation space for the rotating shaft; a clamping assembly disposed on the fixed frame and configured to fix the rotating shaft in its axial direction; and a power assembly connected to the clamping assembly and configured to drive the clamping assembly to rotate the rotating shaft relative to the fixed frame about its axis.

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