Surface-mounted motor rotor and motor

Abstract

The utility model provides a kind of surface-mounted motor rotor and motor, surface-mounted motor rotor includes: connecting shaft, magnetic steel subsection accessory and sheath subsection accessory, magnetic steel subsection accessory is located at the outer periphery of connecting shaft, sheath subsection accessory is located at the outer periphery of magnetic steel subsection accessory, and along the axial direction of connecting shaft, magnetic steel subsection accessory has at least two, at least two magnetic steel subsection accessories are sequentially arranged along axial direction, along axial direction, sheath subsection accessory has at least two, at least two sheath subsection accessories are sequentially arranged along axial direction, the number and axial total length of at least two magnetic steel subsection accessories, and the number and axial total length of at least two sheath subsection accessories can be selectively adjusted with the axial length of connecting shaft.According to the utility model, the number of magnetic steel subsection accessories and the number of sheath subsection accessories can be selectively adjusted according to the axial length of connecting shaft, which improves the generalization degree of products and materials.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a surface-mount motor rotor and motor. Background Technology

[0002] High-speed motors typically use magnetic or air bearings to suspend the rotor in mid-air. This eliminates mechanical friction during operation, effectively reducing losses and heat generation. Furthermore, it offers advantages such as no lubrication required and no oil pollution, significantly increasing the motor's critical speed and extending its lifespan. High-speed motor rotors are categorized into surface-mounted and internal types, representing the main research direction for high-speed motor rotors.

[0003] Existing surface-mount high-speed motor rotors typically consist of a front short shaft, a bearing rotor assembly, a rear short shaft, a sheath, and magnets, with a structure as follows: Figure 1 As shown in the diagram, in the existing traditional surface-mount high-speed motor rotor structure, the sheath, front and rear short shafts, magnets, and bearing rotor assembly all employ a heat-fitting process with interference fits. Because of this heat-fitting process, the assembly time for this type of surface-mount high-speed motor rotor is long, and the design is almost impossible to adjust after manufacturing, resulting in low flexibility. If adjustments are needed after manufacturing, the entire original rotor must be scrapped, leading to poor economic efficiency.

[0004] Because existing surface-mounted high-speed motor rotors use a heat-shrink process, they suffer from long assembly times, and once manufactured, the design is almost impossible to adjust, resulting in low flexibility and low versatility. Therefore, this invention researches and designs a surface-mounted motor rotor and motor. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the defect of low universality performance of the surface-mounted high-speed motor rotor in the prior art due to the use of heat fitting process, and thus provide a surface-mounted motor rotor and motor.

[0006] To address the aforementioned problems, this utility model provides a surface-mount motor rotor, comprising:

[0007] The system comprises a connecting shaft, magnet segment components, and sheath segment components. The magnet segment components are located on the outer periphery of the connecting shaft, and the sheath segment components are located on the outer periphery of the magnet segment components along the axial direction of the connecting shaft. There are at least two magnet segment components, which are sequentially connected along the axial direction. There are also at least two sheath segment components, which are sequentially connected along the axial direction. The number and total axial length of the at least two magnet segment components, as well as the number and total axial length of the at least two sheath segment components, can be selectively adjusted according to the axial length of the connecting shaft.

[0008] In some implementations...

[0009] The sheath segment fitting is a ring structure with a first boss on one axial end face and a first groove on the other axial end face. In the two sheath segment fittings connected in the axial direction, the first boss of one sheath segment fitting can be inserted into the first groove of the other sheath segment fitting to form an insertion fit, so that at least two sheath segment fittings can rotate circumferentially as a whole; at least two sheath segment fittings are sequentially inserted to form the overall structure of the sheath.

[0010] In some implementations...

[0011] Along the axial direction, the axial height of the first boss is less than the axial height of the first groove; and there are at least two first bosses, which are distributed circumferentially along the sheath segment fitting, and the first bosses have an arc-shaped structure in the axial projection plane of the sheath segment fitting; there are at least two first grooves, which are distributed circumferentially along the sheath segment fitting, and the first grooves have an arc-shaped groove structure in the axial projection plane of the sheath segment fitting; and the first grooves are provided in a one-to-one correspondence with the first bosses.

[0012] In some implementations...

[0013] It also includes an upper ring at the end of the sheath, which is also a ring structure and is located at one axial end of the overall structure of the sheath.

[0014] When the first boss is provided on the axial end face of the upper ring of the sheath, the upper ring of the sheath is provided on the axial end face of the sheath segment accessory, and the first boss can be inserted into the second groove so that the upper ring of the sheath and the sheath segment accessory can rotate circumferentially as a unit.

[0015] When the first groove is provided on the axial end face of the upper ring of the sheath facing the sheath segment accessory, a second boss is provided on the axial end face of the upper ring of the sheath facing the sheath segment accessory. The second boss is inserted into the first groove, which enables the upper ring of the sheath and the sheath segment accessory to rotate circumferentially as a unit.

[0016] In some implementations...

[0017] It also includes a first short shaft, at least a portion of which is located on the radial inner circumference of the upper ring of the sheath. The portion of the first short shaft opposite to the upper ring of the sheath is formed as a first flat shaft, and the portion of the upper ring of the sheath opposite to the first flat shaft is formed as a first flat hole. The first flat shaft and the first flat hole are inserted into each other, so that the upper ring of the sheath and the first short shaft can rotate circumferentially as a unit.

[0018] In some implementations...

[0019] The first short shaft has a first receiving hole formed on one axial end face in the direction of its other axial end face. The inner peripheral wall of the first receiving hole is provided with a first internal thread to form a first threaded hole. The outer peripheral wall of one axial end of the connecting shaft is provided with a first external thread. One axial end of the connecting shaft can be inserted into the first threaded hole to form a threaded connection.

[0020] It also includes a second short shaft, on one axial end face of the second short shaft, a second receiving hole is formed in the direction toward the other axial end face, the inner peripheral wall of the second receiving hole is provided with a second internal thread to form a second threaded hole, the outer peripheral wall of the other axial end of the connecting shaft is provided with a second external thread, and the other axial end of the connecting shaft can be inserted into the second threaded hole to form a threaded connection.

[0021] In some implementations...

[0022] The outer peripheral wall of the connecting shaft is provided with a raised rib, and the inner peripheral wall of the magnet segment fitting is provided with a third groove. The raised rib can be inserted into the third groove and extends along the axial direction of the connecting shaft. At least two magnet segment fittings are provided with a third groove on their inner peripheral walls, which are inserted into the raised rib, so that at least two magnet segment fittings and the connecting shaft can rotate circumferentially as a unit. The magnet segment fitting and the sheath segment fitting are clearance fit or transition fit.

[0023] In some implementations...

[0024] There are at least two ribs, and the at least two ribs are spaced apart on the outer peripheral wall of the connecting shaft; there are also at least two third grooves, and the at least two third grooves are spaced apart on the inner peripheral wall of the magnet segment fitting; and the ribs and the third grooves are arranged in a one-to-one correspondence; along the axial direction, the magnet segment fitting and the sheath segment fitting are arranged in a one-to-one correspondence.

[0025] In some implementations...

[0026] It also includes a first bearing rotor assembly, which is disposed on the axial end of the upper ring of the sheath away from the sheath segment accessory, and the first bearing rotor assembly is also sleeved on the outer periphery of the first flat shaft of the first short shaft. The portion of the first bearing rotor assembly opposite to the first flat shaft forms a second flat hole structure. The first flat shaft and the second flat hole form an insertion fit, so that the first bearing rotor assembly and the first short shaft can rotate circumferentially as a whole.

[0027] It also includes a second bearing rotor assembly, which is sleeved on the outer periphery of a portion of the second short shaft. The portion of the second short shaft that is radially opposite to the second bearing rotor assembly forms a second flat shaft structure. The portion of the second bearing rotor assembly that is radially opposite to the second flat shaft forms a third flat hole structure. The second flat shaft and the third flat hole are inserted into each other, so that the second bearing rotor assembly and the second short shaft can rotate circumferentially as a whole.

[0028] In some implementations...

[0029] It also includes a first locking nut and a second locking nut. The first locking nut is disposed on the axial end of the first bearing rotor assembly away from the upper end ring of the sheath, and the first locking nut is sleeved on the outer periphery of a portion of the first short shaft. The first locking nut and the portion of the first short shaft form a threaded engagement, so that the first locking nut axially limits the first bearing rotor assembly.

[0030] The second locking nut is disposed at one axial end of the second bearing rotor assembly opposite to the sheath segment accessory, and the second locking nut is sleeved on the outer periphery of a portion of the second short shaft. The second locking nut and the portion of the second short shaft form a threaded engagement, so that the second locking nut axially limits the second bearing rotor assembly.

[0031] This utility model also provides an electric motor, which includes the aforementioned surface-mount motor rotor.

[0032] The surface-mount motor rotor and motor provided by this utility model have the following beneficial effects:

[0033] 1. This utility model, by configuring the surface-mount motor rotor as a structure including a connecting shaft, segmented magnet components, and segmented sheath components, effectively creates a segmented and modular structure for the sheath and magnet structures. It allows for selective adjustment of the number of magnet and sheath segments based on the axial length of the connecting shaft, enabling the assembly of connecting shafts, magnets, and sheaths of different lengths. This significantly improves the versatility of the product and materials. Because this utility model uses multi-segmented components for the magnet and sheath structures, both parts can be modularly designed, breaking the limitation of a single set of materials and a single solution for high-speed motor rotors. This allows for the combination and testing of multiple stacking schemes with a single set of materials, greatly reducing the motor adjustment cycle and improving material versatility. The scheme can be flexibly adjusted, effectively solving the problems of long assembly time, almost non-adjustable schemes, low flexibility, and low versatility inherent in existing surface-mount high-speed motor rotors due to the use of heat-fitting technology.

[0034] 2. This utility model further improves upon the design by configuring the sheath segment components with a first boss on one axial end face and a first groove on the other axial end face. This allows the first boss and first groove of two adjacent sheath segment components to be inserted into each other, enabling multiple sheath segment components to be assembled into a single unit and rotate circumferentially. This provides protection for the inner circumferential magnet and connecting shaft, eliminating the need for heat-fitting assembly in the prior art. Each component is easy to assemble and disassemble, improving product manufacturability. Furthermore, this utility model features an upper ring at one axial end of the overall sheath structure. The upper ring has a second groove or second boss on its axial end face facing the sheath segment component, which engages with the first boss or first groove on the sheath segment component. This allows the upper ring and the sheath segment component to rotate circumferentially as a single unit, enabling mechanical assembly of each component and eliminating the need for heat-fitting, thus improving manufacturability and ease of disassembly. The use of arc-shaped bosses and arc-shaped grooves in the sheath segment components enhances the structural strength of the connection points.

[0035] 3. This utility model also features a structure with mutually cooperating protruding ribs and a third groove between the connecting shaft and the segmented magnet components, enabling a plug-in fit that allows the segmented magnet components to rotate integrally with the connecting shaft. Furthermore, the first short shaft can form a flat shaft and flat hole structure with the upper ring of the sheath, allowing the rotation of the first short shaft to drive the upper ring of the sheath to rotate integrally, thereby driving the segmented sheath components to rotate integrally as well. This further eliminates the need for heat-fitting at this location in existing technologies, further improving manufacturability and ease of assembly / disassembly. The threaded connection between the first short shaft and one end of the connecting shaft allows the first short shaft to rotate integrally with the connecting shaft, and the second short shaft at the other end of the connecting shaft's axial direction also rotates integrally with the connecting shaft, ultimately forming a rotor structure that rotates integrally in the circumferential direction.

[0036] 4. This utility model further improves upon the invention by setting the inner circumference of the first bearing rotor assembly as a second flat hole structure, which engages with the first flat shaft of the first short shaft, enabling the first bearing rotor assembly to rotate with the first short shaft and thus rotate circumferentially as a whole. Similarly, by setting the inner circumference of the second bearing rotor assembly as a third flat hole structure, which engages with the second flat shaft of the second short shaft, the second bearing rotor assembly to rotate with the second short shaft and thus rotate circumferentially as a whole. Furthermore, by setting locking nuts at both ends of the two bearing rotor assemblies, which can respectively form threaded engagements with the first and second short shafts, the invention effectively limits the axial movement of the two bearing rotor assemblies. Attached Figure Description

[0037] Figure 1 This is a front view (partial section) of the rotor structure of a surface-mounted high-speed motor in the prior art;

[0038] Figure 2 This is a front sectional view of the surface-mounted high-speed motor rotor of this utility model;

[0039] Figure 3 These are a side view and a front sectional view of the upper end ring of the motor rotor sheath of this utility model.

[0040] Figure 4 These are side views and front sectional views of the first and second short shafts of the motor rotor of this utility model.

[0041] Figure 5 These are the front view, side view, and perspective view of the connecting shaft of the motor rotor of this utility model;

[0042] Figure 6 These are the side and front views of the magnet segment accessory for the motor rotor of this utility model;

[0043] Figure 7 These are the side view, front sectional view and perspective view of the motor rotor sheath segment accessory of this utility model.

[0044] Figure 8 These are side views and perspective views of the first and second bearing rotor assemblies of the motor rotor of this utility model.

[0045] Figure 9 These are side views, front sectional views, and perspective views of the first and second locking nuts of the motor rotor of this utility model.

[0046] The reference numerals in the attached figures are as follows:

[0047] 1. Connecting shaft; 2. Magnet segment fittings; 3. Sheath segment fittings; 4. First boss; 5. First groove; 6. Upper ring of sheath; 7. Second groove; 8. First short shaft; 9. First flat shaft; 10. First flat hole; 11. First receiving hole; 12. First internal thread; 13. First external thread; 14. Second short shaft; 15. Second receiving hole; 16. Second internal thread; 17. Second external thread; 18. Rib; 19. Third groove; 20. First bearing rotor assembly; 21. Second flat hole; 22. Second bearing rotor assembly; 23. Second flat shaft; 24. Third flat hole; 25. First locking nut; 26. Second locking nut; 31. Heat sleeve; 32. Sheath; 33. Solid magnet. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0051] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0054] like Figure 2-9 As shown, this utility model provides a surface-mount motor rotor, which includes:

[0055] The system comprises a connecting shaft 1, magnet segment components 2, and sheath segment components 3. The magnet segment components 2 are located on the outer periphery of the connecting shaft 1, and the sheath segment components 3 are located on the outer periphery of the magnet segment components 2 and are arranged along the axial direction of the connecting shaft 1. There are at least two magnet segment components 2, which are sequentially connected along the axial direction. There are at least two sheath segment components 3, which are sequentially connected along the axial direction. The number and total axial length of the at least two magnet segment components 2, as well as the number and total axial length of the at least two sheath segment components 3, can be selectively adjusted according to the axial length of the connecting shaft 1.

[0056] This invention effectively segments and modularizes the sheath and magnet structures by configuring the surface-mount motor rotor with a structure including a connecting shaft, segmented magnet components, and segmented sheath components. This allows for selective adjustment of the number of magnet and sheath components based on the axial length of the connecting shaft, enabling assembly of connecting shafts, magnets, and sheaths of different lengths. This significantly improves the versatility of the product and materials. Because this invention uses multi-segmented components for the magnet and sheath structures, both parts can be modularly designed, breaking the limitation of a single set of materials for one solution in traditional high-speed motor rotors. This allows for the testing of multiple stacking schemes with a single set of materials, greatly reducing the motor adjustment cycle and improving material versatility. The scheme can be flexibly adjusted, effectively solving the problems of long assembly time, almost non-adjustable schemes, low flexibility, and low versatility inherent in existing surface-mount high-speed motor rotors due to the use of heat-fitting technology.

[0057] The sheath segment accessories and magnet segment accessories of this utility model are modularly designed. After they are used together, the motor stacking scheme can be flexibly adjusted. If the rotor stacking height needs to be increased, the corresponding number of sheath segment accessories and magnet segment accessories are added, and the connecting shaft of the corresponding length is replaced at the same time (the opposite is true if the stacking height is reduced). This greatly reduces the motor adjustment scheme cycle and improves the versatility of materials.

[0058] The surface-mounted high-speed motor rotor proposed in this utility model adopts a partially modular design, which greatly reduces the motor adjustment cycle during the design and prototyping stage and improves the versatility of materials; the components adopt mechanical fit, eliminating the hot fitting process and improving manufacturability and disassembly; the sheath segmented accessories adopt arc-shaped bosses and arc-shaped grooves to improve the structural strength of the connection.

[0059] In some implementations...

[0060] The sheath segment component 3 has a ring structure, with a first boss 4 on one axial end face and a first groove 5 on the other axial end face. In the two sheath segment components that are connected in the axial direction, the first boss 4 of one sheath segment component 3 can be inserted into the first groove 5 of the other sheath segment component to form an insertion fit, so that at least two sheath segment components can rotate circumferentially as a whole; at least two sheath segment components 3 are inserted and fitted in sequence to form the overall structure of the sheath.

[0061] This utility model also sets the sheath segment accessories with a first boss on one axial end face and a first groove on the other axial end face, which enables the first boss and the first groove of two adjacent sheath segment accessories to be inserted and engaged, thereby allowing multiple sheath segment accessories to be assembled into one piece and rotate circumferentially as a whole, satisfying the protection function of the inner circumferential magnet and the connecting shaft, eliminating the thermal assembly method in the prior art, making each component easy to disassemble and assemble, and improving the product manufacturability.

[0062] In some implementations...

[0063] Along the axial direction, the axial height of the first boss 4 is less than the axial height of the first groove 5; and there are at least two first bosses 4, which are distributed circumferentially around the sheath segment 3, and the first bosses 4 have an arc-shaped structure in the axial projection plane of the sheath segment 3; there are at least two first grooves 5, which are distributed circumferentially around the sheath segment 3, and the first grooves 5 have an arc-shaped groove structure in the axial projection plane of the sheath segment 3; and the first grooves 5 are provided in a one-to-one correspondence with the first bosses 4.

[0064] The sheath of this utility model adopts a segmented structure with an arc-shaped boss and an arc-shaped groove. The height of the arc-shaped boss is slightly smaller than the depth of the arc-shaped groove to avoid axial gaps during assembly. The segmented sheath components in the high-speed motor rotor are mainly subjected to tangential forces brought about by the high-speed rotation of the rotor. The use of an arc-shaped structure can greatly improve the structural strength of the connection of the segmented sheath components.

[0065] In some implementations...

[0066] It also includes an upper ring 6 of the sheath, which is also a ring structure and is located at one axial end of the overall structure of the sheath.

[0067] When the first boss 4 is provided on the axial end face of the upper ring 6 of the sheath 3, the second groove 7 is provided on the axial end face of the upper ring 6 of the sheath 3. The first boss 4 can be inserted into the second groove 7, so that the upper ring 6 of the sheath and the sheath segment 3 can rotate circumferentially as a unit.

[0068] When the first groove 5 is provided on the axial end face of the upper ring 6 of the sheath 3, a second boss (not shown) is provided on the axial end face of the upper ring 6 of the sheath 3. The second boss is inserted into the first groove 5, which enables the upper ring 6 of the sheath and the sheath segment 3 to rotate circumferentially as a unit.

[0069] This utility model further incorporates an upper ring at one axial end of the overall sheath structure. The upper ring has a second groove or a second boss on its axial end face facing the sheath segment fitting, which engages with the first boss or groove on the sheath segment fitting. This allows the upper ring and the sheath segment fitting to rotate as a single unit, enabling mechanical assembly of all components, eliminating the need for heat fitting, and improving manufacturability and ease of disassembly. The sheath segment fitting utilizes an arc-shaped boss and an arc-shaped groove, enhancing the structural strength of the connection.

[0070] In some implementations...

[0071] It also includes a first short shaft 8 (front short shaft), at least a portion of the structure of the first short shaft 8 is located on the radial inner circumference of the upper end ring 6 of the sheath, the portion of the first short shaft 8 opposite to the upper end ring 6 of the sheath is formed as a first flat shaft 9, the portion of the upper end ring 6 of the sheath opposite to the first flat shaft 9 is formed as a first flat hole 10, the first flat shaft 9 and the first flat hole 10 are inserted into each other, so that the upper end ring 6 of the sheath and the first short shaft 8 can rotate circumferentially as a unit.

[0072] This utility model also uses a first short shaft to form a flat shaft and flat hole structure with the upper ring of the sheath, so that the rotation of the first short shaft drives the upper ring of the sheath to rotate as a whole, thereby driving the segmented accessories of the sheath to rotate as a whole. Furthermore, the upper ring of the sheath and the first short shaft also adopt a mechanical cooperation to complete the mutual driving transmission and rotation, further eliminating the heat-fitting process at this position in the prior art, and further improving the manufacturability and disassemblyability.

[0073] In some implementations...

[0074] The first short shaft 8 has a first receiving hole 11 formed on one axial end face in the direction of its other axial end face. The inner peripheral wall of the first receiving hole 11 is provided with a first internal thread 12 to form a first threaded hole. The outer peripheral wall of one axial end of the connecting shaft 1 is provided with a first external thread 13. One axial end of the connecting shaft 1 can be inserted into the first threaded hole to form a threaded connection.

[0075] It also includes a second short shaft 14 (rear short shaft), one axial end face of the second short shaft 14 is formed with a second receiving hole 15 in the direction toward the other axial end face, the inner peripheral wall of the second receiving hole 15 is provided with a second internal thread 16 to form a second threaded hole, the outer peripheral wall of the other axial end of the connecting shaft 1 is provided with a second external thread 17, and the other axial end of the connecting shaft 1 can be inserted into the second threaded hole to form a threaded connection.

[0076] This utility model also utilizes a threaded connection structure formed between the first short shaft and one end of the connecting shaft, enabling the first short shaft to rotate integrally with the connecting shaft. Furthermore, the second short shaft at the other end of the connecting shaft can also rotate integrally with the connecting shaft, thus ultimately forming a rotor structure that rotates circumferentially. Additionally, mechanical cooperation is employed between the two short shafts and the connecting shaft to achieve mutual driving transmission and rotation, further eliminating the need for heat-fitting processes at this location in existing technologies, and further improving manufacturability and ease of assembly / disassembly.

[0077] When the surface-mounted high-speed rotor of this invention is running, the magnet is subjected to a magnetic field and the force is transmitted to the connecting shaft through the cooperation of the groove and the fixing rib. The connecting shaft transmits the torque to the front and rear short shafts through the threads at both ends (the threaded cooperation between the connecting shaft and the front and rear short shafts is in the same direction as the rotor rotation). The front and rear short shafts drive the bearing rotor assembly to rotate through the flat structure.

[0078] In some implementations...

[0079] The outer peripheral wall of the connecting shaft 1 is provided with a rib 18, and the inner peripheral wall of the magnet segment accessory 2 is provided with a third groove 19. The rib 18 can be inserted into the third groove 19, and the rib 18 extends along the axial direction of the connecting shaft 1. At least two magnet segment accessories 2 are provided with a third groove 19 on their inner peripheral walls, which are inserted into the rib 18, so that at least two magnet segment accessories 2 and the connecting shaft 1 can rotate circumferentially as a unit. The magnet segment accessory 2 and the sheath segment accessory 3 are in clearance fit or transition fit.

[0080] This invention also features a structure with mutually cooperating protruding ribs and a third groove between the connecting shaft and the magnet segment components, enabling a plug-in fit. This allows the magnet segment components to rotate integrally with the connecting shaft. Furthermore, a mechanical fit is used between the magnet and the connecting shaft to achieve mutual driving transmission and rotation, further eliminating the need for heat-fitting processes in existing technologies at this location, thus improving manufacturability and ease of assembly and disassembly. The magnet segment components and sheath segment components of this invention utilize a gap or transition fit, eliminating the interference fit required by existing heat-fitting processes. This further facilitates the assembly and disassembly of the sheath and magnet, further improving assembly and disassembly efficiency and versatility.

[0081] In some implementations...

[0082] There are at least two ribs 18, and the at least two ribs 18 are arranged circumferentially on the outer peripheral wall of the connecting shaft 1; there are also at least two third grooves 19, and the at least two third grooves 19 are arranged at intervals between the magnet segment accessory 2 and the sheath segment accessory 3 on the inner peripheral wall of the magnet segment accessory 2; and the ribs 18 and the third grooves 19 are arranged in a one-to-one correspondence; along the axial direction, the magnet segment accessory 2 and the sheath segment accessory 3 are arranged in a one-to-one correspondence.

[0083] This utility model uses multiple circumferential ribs and multiple third grooves to form a plug-in fit, so that the connecting shaft can effectively drive the magnet segment accessories to rotate as a whole. This utility model preferably has a structure in which the sheath segment accessories and the magnet segment accessories are of the same height. This structure can also adopt a structure with different heights (such as the sheath segment accessories being 30mm high and the magnet segment accessories being 20mm high), as long as they are of equal height after being combined.

[0084] In some implementations...

[0085] It also includes a first bearing rotor assembly 20, which is disposed on the axial end of the upper ring 6 of the sheath away from the sheath segment accessory 3, and the first bearing rotor assembly 20 is also sleeved on the outer periphery of the first flat shaft 9 of the first short shaft 8. The portion of the first bearing rotor assembly 20 opposite to the first flat shaft 9 is formed into a structure of a second flat hole 21. The first flat shaft 9 and the second flat hole 21 form an insertion fit, so that the first bearing rotor assembly 20 and the first short shaft 8 can rotate circumferentially as a whole.

[0086] It also includes a second bearing rotor assembly 22, which is disposed on a portion of the second short shaft 14 away from the axial end of the sheath segment fitting 3, and the second bearing rotor assembly 22 is sleeved on the outer periphery of the portion of the second short shaft 14. The portion of the second short shaft 14 and the second bearing rotor assembly 22 that are radially opposite each other are formed into a second flat shaft 23. The portion of the second bearing rotor assembly 22 and the second flat shaft 23 that are radially opposite each other are formed into a third flat hole 24. The second flat shaft 23 and the third flat hole 24 are inserted into each other, so that the second bearing rotor assembly 22 and the second short shaft 14 can rotate circumferentially as a whole.

[0087] This invention further improves upon existing technology by setting the inner circumference of the first bearing rotor assembly as a second flat hole structure, which mates with the first flat shaft of the first short shaft, enabling the first bearing rotor assembly to rotate with the first short shaft and thus rotate circumferentially as a whole. Similarly, by setting the inner circumference of the second bearing rotor assembly as a third flat hole structure, which mates with the second flat shaft of the second short shaft, the second bearing rotor assembly to rotate with the second short shaft and thus rotate circumferentially as a whole. This further eliminates the need for heat-fitting between the bearing rotor assembly and the two short shafts in the prior art, further improving the manufacturability and detachability of this location, making disassembly and assembly more convenient and efficient.

[0088] In some implementations...

[0089] It also includes a first locking nut 25 and a second locking nut 26. The first locking nut 25 is disposed on the axial end of the first bearing rotor assembly 20 away from the upper end ring 6 of the sheath, and the first locking nut 25 is sleeved on the outer periphery of a portion of the shaft section of the first short shaft 8. The first locking nut 25 and the portion of the shaft section of the first short shaft 8 form a threaded engagement, so that the first locking nut 25 axially limits the first bearing rotor assembly 20.

[0090] The second locking nut 26 is disposed at the axial end of the second bearing rotor assembly 22 away from the sheath segment accessory 3, and the second locking nut 26 is sleeved on the outer periphery of a portion of the second short shaft 14. The second locking nut 26 and the portion of the second short shaft 14 form a threaded engagement, so that the second locking nut 26 axially limits the second bearing rotor assembly 22.

[0091] Furthermore, this utility model also features a structure in which locking nuts are respectively provided at both ends of the two bearing rotor assemblies, which can form a threaded engagement with the first short shaft and the second short shaft respectively, effectively limiting the axial movement of the two bearing rotor assemblies.

[0092] The high-speed motor rotor of this invention is easy to assemble and disassemble. During assembly, simply nest the parts together in sequence and finally lock them with a lock nut. During disassembly, simply loosen the lock nut at the front short shaft end and the parts can be taken out one by one, which greatly improves the disassembly and assembly and manufacturability of the high-speed motor rotor.

[0093] This utility model also provides an electric motor, which includes the aforementioned surface-mount motor rotor.

[0094] The high-speed motor rotor of this utility model consists of a front short shaft, a rear short shaft, a connecting shaft, an upper end ring of the sheath, segmented sheath accessories, segmented magnet accessories, a bearing rotor assembly, and a locking nut. Some parts are modularly designed, breaking the limitation of the original high-speed motor rotor having only one set of materials and one solution. One set of materials can be combined to test multiple stacking schemes, which greatly reduces the motor adjustment scheme cycle and the degree of material versatility.

[0095] The components of this invention are mechanically coupled to each other, eliminating the need for thermal assembly, and each component is easy to disassemble and assemble, thus improving the product's manufacturability.

[0096] This utility model provides a surface-mount high-speed motor rotor structure and assembly method. The surface-mount high-speed motor rotor consists of a front short shaft, a rear short shaft, a connecting shaft, an upper ring of the sheath, segmented sheath components, segmented magnet components, a bearing rotor assembly, and a locking nut. The components mate with each other, eliminating the need for heat-fitting assembly. Furthermore, each component is easy to disassemble and assemble, improving product manufacturability. The modular design of the magnets and sheath breaks the limitation of a single set of materials and solutions for traditional high-speed motor rotors. By simply replacing the intermediate connecting shaft, multiple stacking height schemes can be combined and tested, significantly reducing the motor adjustment cycle and increasing the versatility of materials.

[0097] The present invention preferably uses non-magnetic material (such as SUS304) for the front short shaft, rear short shaft, connecting shaft and upper end ring of the sheath, and is machined.

[0098] The preferred sheath segment accessories of this utility model are made of high-temperature nickel-based alloy (such as GH4169) and machined.

[0099] The preferred magnetic steel segment accessories of this utility model are made of suitable neodymium iron boron materials (such as 35UH, 38UH), which are sintered and then machined.

[0100] The preferred bearing rotor assembly of this utility model is composed of 40Cr and silicon steel sheets, and is assembled.

[0101] The locking nut of this utility model can be a suitable standard part.

[0102] Assembly process:

[0103] ① First, the upper ring of the sheath (such as...) needs to be removed. Figure 3 ) snapped back onto the tooling (the tooling should be hollow in the middle to allow the shaft to pass through), the front short shaft (such as Figure 4 With the shaft extension end facing down, align it with the flat part and insert it into the upper ring of the sheath.

[0104] ② Connecting shaft (e.g.) Figure 5 One end is screwed into the threaded hole of the front short shaft for fixation, and then a suitable number of magnet segment accessories (such as...) are installed. Figure 6 Align the grooves with the fixing ribs of the connecting shaft and install them one by one. Then assemble the same number of sheath segment parts (the arc-shaped boss of the first sheath segment part is assembled into the arc-shaped groove of the front short shaft, the arc-shaped boss of the second sheath segment part is assembled into the arc-shaped groove of the first sheath segment part, and so on).

[0105] ③ Align the threaded hole of the rear short shaft with the thread at the other end of the connecting shaft and tighten the assembly.

[0106] ④ Align the flat part of the bearing rotor assembly with the flat part of the rear short shaft, place it directly into the assembly, and then tighten it with the lock nut.

[0107] ⑤ Switch the rotors so that the front short shaft is facing upwards, and then install the bearing rotor assembly and lock nut to complete the assembly.

[0108] Disassembling the entire rotor is also very simple. Just turn the front short shaft upwards, loosen the lock nut, and you can take out the parts one by one.

[0109] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A surface-mount motor rotor, characterized in that: include: The connection shaft (1), the magnet segment fittings (2), and the sheath segment fittings (3) are provided. The magnet segment fittings (2) are located on the outer periphery of the connection shaft (1), and the sheath segment fittings (3) are located on the outer periphery of the magnet segment fittings (2). Along the axial direction of the connection shaft (1), there are at least two magnet segment fittings (2), which are sequentially connected along the axial direction. Along the axial direction, there are at least two sheath segment fittings (3), which are sequentially connected along the axial direction. The number and total axial length of the at least two magnet segment fittings (2) and the number and total axial length of the at least two sheath segment fittings (3) can be selectively adjusted according to the axial length of the connection shaft (1).

2. The surface-mounted motor rotor according to claim 1, characterized in that: The sheath segment fitting (3) has a ring structure, with a first boss (4) on one axial end face and a first groove (5) on the other axial end face. In the two sheath segment fittings connected in the axial direction, the first boss (4) of one sheath segment fitting (3) can be inserted into the first groove (5) of the other sheath segment fitting to form a plug-in fit, so that at least two sheath segment fittings can rotate circumferentially as a whole; at least two sheath segment fittings (3) are plugged in sequentially to form the overall structure of the sheath.

3. The surface-mounted motor rotor according to claim 2, characterized in that: Along the axial direction, the axial height of the first boss (4) is less than the axial height of the first groove (5); and there are at least two first bosses (4), which are distributed circumferentially along the sheath segment fitting (3), and the first bosses (4) are arc-shaped structures in the axial projection plane of the sheath segment fitting (3); there are at least two first grooves (5), which are distributed circumferentially along the sheath segment fitting (3), and the first grooves (5) are arc-shaped groove structures in the axial projection plane of the sheath segment fitting (3); and the first grooves (5) are corresponding to the first bosses (4) one by one.

4. The surface-mounted motor rotor according to claim 2, characterized in that: It also includes an upper ring (6) of the sheath, which is also a ring structure. The upper ring (6) of the sheath is located at one axial end of the overall structure of the sheath. When the first boss (4) is provided on the axial end face of the upper ring (6) of the sheath, the second groove (7) is provided on the axial end face of the upper ring (6) of the sheath. The first boss (4) can be inserted into the second groove (7) so that the upper ring (6) of the sheath and the sheath segment (3) can rotate circumferentially as a unit. When the sheath segment fitting (3) is provided with the first groove (5) facing the axial end face of the upper ring (6) of the sheath, the upper ring (6) of the sheath is provided with the second boss facing the axial end face of the sheath segment fitting (3). The second boss is inserted into the first groove (5) so that the upper ring (6) of the sheath and the sheath segment fitting (3) can rotate circumferentially as a unit.

5. The surface-mounted motor rotor according to claim 4, characterized in that: It also includes a first short shaft (8), at least a portion of which is located on the radial inner circumference of the upper ring (6) of the sheath. The portion of the first short shaft (8) opposite to the upper ring (6) of the sheath is formed as a first flat shaft (9), and the portion of the upper ring (6) of the sheath opposite to the first flat shaft (9) is formed as a first flat hole (10). The first flat shaft (9) and the first flat hole (10) are fitted together, so that the upper ring (6) of the sheath and the first short shaft (8) can rotate circumferentially as a unit.

6. The surface-mounted motor rotor according to claim 5, characterized in that: The first short shaft (8) has a first receiving hole (11) formed on one axial end face in the direction of its other axial end face. The inner peripheral wall of the first receiving hole (11) is provided with a first internal thread (12) to form a first threaded hole. The outer peripheral wall of one axial end of the connecting shaft (1) is provided with a first external thread (13). One axial end of the connecting shaft (1) can be inserted into the first threaded hole to form a threaded connection. It also includes a second short shaft (14), one axial end face of the second short shaft (14) is formed with a second receiving hole (15) in the direction toward the other axial end face, the inner peripheral wall of the second receiving hole (15) is provided with a second internal thread (16) to form a second threaded hole, the outer peripheral wall of the other axial end of the connecting shaft (1) is provided with a second external thread (17), and the other axial end of the connecting shaft (1) can be inserted into the second threaded hole to form a threaded connection.

7. The surface-mounted motor rotor according to claim 1, characterized in that: The outer peripheral wall of the connecting shaft (1) is provided with a rib (18), and the inner peripheral wall of the magnet segment fitting (2) is provided with a third groove (19). The rib (18) can be inserted into the third groove (19), and the rib (18) extends along the axial direction of the connecting shaft (1). The inner peripheral walls of at least two magnet segment fittings (2) are provided with a third groove (19), which is inserted into the rib (18) to form a circumferential integral rotation with the connecting shaft (1). The magnet segment fitting (2) and the sheath segment fitting (3) are in clearance fit or transition fit.

8. The surface-mounted motor rotor according to claim 7, characterized in that: There are at least two ribs (18), and at least two ribs (18) are spaced apart circumferentially on the outer peripheral wall of the connecting shaft (1); there are also at least two third grooves (19), and at least two third grooves (19) are spaced apart on the inner peripheral wall of the magnet segment fitting (2) and the sheath segment fitting (3); and the ribs (18) and the third grooves (19) are arranged in a one-to-one correspondence; along the axial direction, the magnet segment fitting (2) and the sheath segment fitting (3) are arranged in a one-to-one correspondence.

9. The surface-mounted motor rotor according to claim 6, characterized in that: It also includes a first bearing rotor assembly (20), which is disposed on the axial end of the upper ring (6) of the sheath away from the sheath segment fitting (3), and the first bearing rotor assembly (20) is also sleeved on the outer periphery of the first flat shaft (9) of the first short shaft (8). The portion of the first bearing rotor assembly (20) opposite to the first flat shaft (9) is formed into a structure of a second flat hole (21). The first flat shaft (9) and the second flat hole (21) form an insertion fit, so that the first bearing rotor assembly (20) and the first short shaft (8) can form a circumferential integral rotation; It also includes a second bearing rotor assembly (22), which is disposed on a portion of the second short shaft (14) away from the axial end of the sheath segment fitting (3). The second bearing rotor assembly (22) is sleeved on the outer periphery of a portion of the second short shaft (14). A portion of the second short shaft (14) and the second bearing rotor assembly (22) that are radially opposite each other forms a second flat shaft (23). A portion of the second bearing rotor assembly (22) and the second flat shaft (23) that are radially opposite each other forms a third flat hole (24). The second flat shaft (23) and the third flat hole (24) form an insertion fit, so that the second bearing rotor assembly (22) and the second short shaft (14) can rotate circumferentially as a whole.

10. The surface-mounted motor rotor according to claim 9, characterized in that: It also includes a first locking nut (25) and a second locking nut (26). The first locking nut (25) is disposed on the axial end of the first bearing rotor assembly (20) away from the upper end ring (6) of the sheath, and the first locking nut (25) is sleeved on the outer periphery of a portion of the shaft section of the first short shaft (8). The first locking nut (25) and the portion of the shaft section of the first short shaft (8) form a threaded engagement, so that the first locking nut (25) axially limits the first bearing rotor assembly (20). The second locking nut (26) is disposed on the axial end of the second bearing rotor assembly (22) away from the sheath segment fitting (3), and the second locking nut (26) is sleeved on the outer periphery of a portion of the shaft segment of the second short shaft (14). The second locking nut (26) and the portion of the shaft segment of the second short shaft (14) form a threaded engagement, so that the second locking nut (26) axially limits the second bearing rotor assembly (22).

11. An electric motor, characterized in that: Includes the surface-mounted motor rotor as described in any one of claims 1-10.

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