Rotor assembly and electric machine

Abstract

The application relates to the field of motors, in particular to a rotor assembly and a motor, which comprises a rotating shaft, the first end of the rotating shaft is provided with an axial positioning part, the second end of the rotating shaft is provided with a blind hole, a driving assembly is arranged in the blind hole, a sliding hole is arranged on the rotating shaft and extends along the rotating shaft and penetrates through the blind hole and the outer surface of the rotating shaft, a locking piece is arranged in the sliding hole, the locking piece has a first position of partially extending out of the sliding hole and a second position of being completely accommodated in the sliding hole, the driving assembly can drive the locking piece to switch between the first position and the second position, and a core module is arranged on the rotating shaft, the core module has an axial through hole, when the core module is sleeved on the rotating shaft through the axial through hole, the locking piece is in the first position and the core module is fixed on the rotating shaft, and when the locking piece is in the second position, the core module can slide on the rotating shaft, so that the technical problem of low detachability of the core module of the rotor assembly is solved.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and more specifically to a rotor assembly and an electric motor. Background Technology

[0002] The rotor of the motor is composed of silicon steel sheets and magnets. Currently, most motors use baffles to cooperate with the rotor, ensuring the rotor's stacking coefficient and restricting the axial displacement of the magnets and silicon steel sheets. The rotor core is not a single piece, but is formed by stacking several silicon steel sheets. One end of the rotor can be limited by the shoulder of the rotor shaft, but the other end has no limit, and the rotor is prone to axial slippage. Current solutions generally use lock nuts and anti-reverse washers to lock the rotor core and baffles, or directly use welded rings for axial limitation, or use rivets, locking bolts, and other structures for locking.

[0003] Another method involves using an interference fit between the motor and the shaft, cold-pressing or hot-fitting the rotor onto the rotor shaft to secure it. This increases assembly time. Both of these processes cannot be repeatedly disassembled and reassembled, have a very low tolerance for error, and prolonged operation can cause the locking nut to loosen. Excessive rotor temperature can also lead to insufficient interference fit, causing the silicon steel sheets to become loose and scattered, increasing motor noise, affecting motor performance, and even damaging motor components. This type of motor rotor, rotor shaft, and rotor core are designed for a single motor model and cannot be used in other models. It is not suitable for modular motor production to reduce production and maintenance costs.

[0004] There is currently no good solution for improving the detachability of the rotor core. Summary of the Invention

[0005] This invention provides a rotor assembly and a motor to solve the technical problem of low detachability of the core module of the rotor assembly.

[0006] On one hand, the present invention provides a rotor assembly, comprising:

[0007] A rotating shaft has an axial positioning part at its first end and a blind hole at its second end, in which a driving component is disposed; a sliding hole is provided on the rotating shaft, extending along the rotating shaft and penetrating the blind hole and the outer surface of the rotating shaft; a locking member is disposed in the sliding hole, the locking member having a first position that partially extends out of the sliding hole and a second position that is fully accommodated in the sliding hole;

[0008] The movement of the drive component can drive the locking member to switch between the first position and the second position;

[0009] The iron core module has an axial through hole. When the iron core module is sleeved on the rotating shaft through the axial through hole, the locking member is in the first position and can fix the iron core module on the rotating shaft. When the locking member is in the second position, the iron core module can slide on the rotating shaft.

[0010] Preferably, the locking element is a stop block that can slide within the sliding hole, the end of the stop block facing the outside of the sliding hole is a limiting end, and a groove is provided in the through hole;

[0011] When the stop block is in the first position, the limiting end is engaged in the groove; when the stop block is in the second position, the limiting end is disengaged from the groove.

[0012] Preferably, the drive assembly includes a slide rod that slides along the axial direction of the blind hole to drive the stop block to move.

[0013] Preferably, the end of the stop block facing the outside of the sliding hole is a limiting end, and the end face of the limiting end is an arc surface.

[0014] Preferably, the outer peripheral surface of the slide bar is provided with an inclined surface extending axially along the shaft;

[0015] When the slide bar moves axially along the rotating shaft, the inclined surface can drive the stop block to slide axially within the sliding hole.

[0016] Preferably, the first end of the slide rod faces the bottom of the blind hole, the first end of the inclined surface is close to the first end of the slide rod, and the other end opposite to the first end of the inclined surface is the second end of the inclined surface;

[0017] The inclined surface gradually slopes from the first end of the inclined surface toward the second end of the inclined surface toward the axis of the slide rod, and a compression spring is provided between the first end face of the slide rod and the bottom surface of the blind hole.

[0018] Preferably, the first end of the slide rod faces the bottom of the blind hole, the first end of the inclined surface is close to the first end of the slide rod, and the other end opposite to the first end of the inclined surface is the second end of the inclined surface;

[0019] The inclined plane gradually slopes from the second end of the inclined plane toward the first end of the inclined plane toward the axis of the slide rod, and a tension spring is provided between the first end face of the slide rod and the bottom surface of the blind hole.

[0020] Preferably, a stop surface is provided between the first end of the inclined surface and the first end of the slide rod. When the limiting end of the stop block is engaged in the groove, the driving end of the stop block abuts against the stop surface.

[0021] Preferably, a first protrusion is provided inside the blind hole, and a second protrusion is provided on the outer peripheral surface of the slide rod. The first protrusion and the second protrusion cooperate to prevent the slide rod from sliding out of the blind hole.

[0022] Preferably, an annular groove is provided inside the blind hole, and an elastic retaining ring is provided inside the annular groove;

[0023] The second protrusion is disposed between the second end of the slide rod and the inclined surface. The second protrusion cooperates with the elastic retaining ring to prevent the slide rod from sliding out of the blind hole.

[0024] Preferably, the outer peripheral surface of the rotating shaft is provided with a limiting groove extending along the axis of the rotating shaft;

[0025] A third protrusion is provided on the inner wall surface of the through hole; when the iron core module slides along the rotating shaft, the third protrusion is engaged in the limiting groove and slides within the limiting groove.

[0026] Preferably, the groove is disposed on the third protrusion, and one end of the sliding hole near the inner wall of the through hole is located in the limiting groove.

[0027] Preferably, the core module includes a core section composed of stacked silicon steel sheets and a first baffle and a second baffle disposed at both ends of the core section;

[0028] When the core module is installed on the rotating shaft, the first baffle abuts against the axial positioning part; the third protrusion is located on the second baffle.

[0029] Preferably, when at least one of the core modules is sequentially sleeved on the rotating shaft, one end of the first core module sleeved on the rotating shaft abuts against the axial positioning part; the groove of the last core module is opposite to the sliding hole.

[0030] On the other hand, the present invention also provides an electric motor including the rotor assembly described above.

[0031] This invention achieves axial positioning and fixation between the core module and the shaft simply by moving the sliding rod, and separates the core module from the shaft by moving the sliding rod again. This enables rapid assembly and disassembly of the core module and shaft, simplifies the process, facilitates later maintenance, has a high fault tolerance rate, and improves the production efficiency of the rotor assembly. Compared with existing rotor assemblies, this application places the fixing component of the core module inside the shaft, specifically radially within the core module, eliminating the need for external fixing of the core module with a nut. This results in a smaller axial dimension of the rotor assembly, which is beneficial for motor miniaturization. Attached Figure Description

[0032] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0033] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0034] Figure 1 This is a schematic diagram of the rotor assembly when the stop block is inserted into the groove according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the rotor assembly when the stop block is not engaged in the groove according to an embodiment of the present invention;

[0036] Figure 3 This is a radial schematic diagram of the iron core module according to an embodiment of the present invention;

[0037] Figure 4 This is a partial axial sectional view of an embodiment of the present invention;

[0038] Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged view of point A in the middle;

[0039] Figure 6 This is an embodiment of the present invention. Figure 4 Enlarged view at point B in the middle;

[0040] Figure 7 This is an axial sectional view of the shaft according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the slide bar according to an embodiment of the present invention;

[0042] Figure 9 This is a perspective view of the second baffle in an embodiment of the present invention.

[0043] The reference numerals in the attached figures are as follows:

[0044] 1. Rotating shaft; 101. Axial positioning part; 102. Sliding hole; 103. Blind hole; 104. First protrusion; 105. Limiting groove; 106. Third protrusion; 107. Retaining ring; 2. Iron core module; 201. Groove; 3. Through hole; 4. Stop block; 5. Sliding rod; 501. Second protrusion; 502. Stop surface; 503. Inclined surface; 6. Compression spring; 701. First baffle; 702. Second baffle; 8. Rivet. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, 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 invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations 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.

[0047] 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; the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that an article or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or system that includes said element.

[0048] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the 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 figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention 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 invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] 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.

[0052] 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, and does not imply any sequential order; unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0053] This invention relates to the field of electric motors, and more specifically to a rotor assembly and an electric motor.

[0054] The rotor of the motor is composed of silicon steel sheets and magnets. Currently, most motors use baffles to cooperate with the rotor, ensuring the rotor's stacking coefficient and restricting the axial displacement of the magnets and silicon steel sheets. The rotor core is not a single piece, but is formed by stacking several silicon steel sheets. One end of the rotor can be limited by the shoulder of the rotor shaft, but the other end has no limit, and the rotor is prone to axial slippage. Current solutions generally use lock nuts and anti-reverse washers to lock the rotor core and baffles, or directly use welded rings for axial limitation, or use rivets, locking bolts, and other structures for locking.

[0055] Another method involves using an interference fit between the motor and the shaft, cold-pressing or hot-fitting the rotor onto the rotor shaft to secure it. This increases assembly time. Both of these processes cannot be repeatedly disassembled and reassembled, have a very low tolerance for error, and prolonged operation can cause the locking nut to loosen. Excessive rotor temperature can also lead to insufficient interference fit, causing the silicon steel sheets to become loose and scattered, increasing motor noise, affecting motor performance, and even damaging motor components. This type of motor rotor, rotor shaft, and rotor core are designed for a single motor model and cannot be used in other models. It is not suitable for modular motor production to reduce production and maintenance costs.

[0056] To improve the removability of the rotor core

[0057] This invention provides a rotor assembly and a motor.

[0058] On one hand, the present invention provides a rotor assembly, comprising:

[0059] A rotating shaft 1 has an axial positioning part 101 at its first end and a blind hole 103 at its second end, wherein a driving assembly is disposed within the blind hole 103. A sliding hole 102 is provided on the rotating shaft 1, extending along the rotating shaft 1 and penetrating the blind hole 103 and the outer surface of the rotating shaft 1. A locking member is disposed within the sliding hole 102, the locking member having a first position where it partially extends out of the sliding hole 102 and a second position where it is fully contained within the sliding hole 102.

[0060] The movement of the drive component can drive the locking member to switch between the first position and the second position;

[0061] The iron core module 2 has an axial through hole 3. When the iron core module 2 is fitted onto the rotating shaft 1 through the axial through hole 3, the locking member is in the first position and can fix the iron core module 2 onto the rotating shaft 1. When the locking member is in the second position, the iron core module 2 can slide on the rotating shaft 1.

[0062] This application uses a driving component to drive a locking element to lock or unlock the core module 2 fitted onto the rotating shaft. In the first position, the core module 2 is fixed to the rotating shaft 1; in the second position, the core module 2 is separated from the rotating shaft 1, allowing it to slide along the axial direction of the rotating shaft 1 and / or rotate around its axis. The phrase "the core module 2 can slide on the rotating shaft 1" includes "the core module 2 can slide along the axial direction of the rotating shaft 1 and / or rotate around its axis." This assembly process is simple, facilitates later maintenance, has a high fault tolerance rate, and improves the production efficiency of the rotor assembly. Compared to existing rotor assemblies, this application places the fixing component of the core module 2 inside the rotating shaft 1, specifically radially inside the core module 2, eliminating the need for a nut to fix the core module 2 externally to the rotating shaft 1. This results in a smaller axial dimension of the rotor assembly, which is beneficial for motor miniaturization.

[0063] Preferably, the locking member is a stop 4 that can slide within the sliding hole 102, the end of the stop 4 facing the outside of the sliding hole 102 is a limiting end, and a groove 201 is provided in the through hole 3;

[0064] The outer side of the sliding hole 102 refers to the side of the sliding hole 102 that is close to the inner wall surface of the blind hole 103, and the corresponding inner side of the sliding hole 102 refers to the side that is close to the axis of the blind hole 103. When the stop block 4 is in the first position, the limiting end is engaged in the groove 201, and when the stop block 4 is in the second position, the limiting end is disengaged from the groove 201.

[0065] The iron core module 2 and the rotating shaft 1 are fixed and detached by the cooperation of the stop block 4 and the groove 201. The structure is simple and highly reliable.

[0066] Preferably, the drive assembly includes a slide rod 5, which slides along the axial direction of the blind hole 103 to drive the stop block 4 to move.

[0067] Simply moving the slide rod 5 allows the stop block 4 to engage with or disengage from the groove 201. This method is simple, convenient, and improves assembly efficiency. The movement of the slide rod 5 includes sliding along the axial direction of the blind hole 103, rotating around its own axis, or rotating while sliding.

[0068] The quick assembly and disassembly of the core module 2 and the rotating shaft 1 are achieved through the cooperation between the slide bar 5 and the stop block 4. The process is simple, easy to maintain, has a high fault tolerance rate, and improves the production efficiency of the rotor assembly. Compared with existing rotor assemblies, this application sets the fixing component of the core module 2 inside the rotating shaft 1, and located radially inside the core module 2. This eliminates the structure of fixing the core module 2 to the outside of the rotating shaft 1 with a nut, resulting in a smaller axial dimension of the rotor assembly, which is beneficial for motor miniaturization.

[0069] The fit between the core module 2 and the shaft 1 is independent of the outer diameter of the core module 2. One type of shaft 1 can be fitted with core modules 2 of different outer diameters, improving the applicability of the shaft 1, which is beneficial for mass production and thus reduces R&D and production costs. The core modules 2 can be combined together to be used as a single core, improving the versatility of the core.

[0070] Preferably, the end of the stop block 4 facing the outside of the sliding hole 102 is a limiting end, and the end face of the limiting end is an arc surface.

[0071] When the limiting end of the stop block 4 is engaged in the groove 201, the iron core module 2 is slid again. The inner wall surface of the groove 201 and the end face of the limiting end of the stop block 4 are pressed against each other, so that the stop block 4 can slide out of the groove 201 smoothly. In this way, the limiting end of the stop block 4 can be easily slid out of the groove 201, which facilitates the sliding of the iron core module 2.

[0072] To facilitate the better sliding of the limiting end of the stop block 4 out of the groove 201, the inner surface of the groove 201 can be made into an arc surface, and the arc surface of the groove 201 matches the arc surface of the end face of the limiting end of the stop block 4; this not only facilitates the smoother sliding of the limiting end of the stop block 4 out of the groove 201, but also improves the accuracy of the stop block 4 in limiting the iron core module 2.

[0073] Preferably, the outer peripheral surface of the slide bar 5 is provided with an inclined surface 503 extending along the axial direction of the rotating shaft 1;

[0074] When the slide bar 5 moves along the axial direction of the rotating shaft 1, the inclined surface 503 can drive the stop block 4 to slide along the axial direction of the slide hole 102 within the slide hole 102.

[0075] The other end opposite to the limiting end of the stop block 4 is the driving end of the stop block 4. When the limiting end of the stop block 4 needs to slide out of the sliding hole 102 and be inserted into the groove 201, the sliding rod 5 slides in the forward direction. The inclined surface 503 drives the driving end of the stop block 4 to slide away from the blind hole 103, thereby causing the limiting end of the stop block 4 to slide out of the sliding hole 102 and be inserted into the groove 201. When the limiting end of the stop block 4 needs to be disengaged from the groove 201, the sliding rod 5 slides in the reverse direction. At the same time, the iron core module 2 slides. The driving end of the stop block 4 is no longer driven by the inclined surface 503. The limiting end of the stop block 4 is squeezed by the groove 201 of the iron core module 2, thereby causing the limiting end of the stop block 4 to disengage from the groove 201.

[0076] The stop block 4 is driven by the inclined surface 503 on the slide rod 5. When the limiting end of the stop block 4 is engaged in the groove 201, the fixed slide rod 5 can ensure that the limiting end of the stop block 4 will not be dislodged from the groove 201 simply because of the sliding of the iron core module 2, thereby improving the stability of the axial positioning of the stop block 4 on the iron core module 2.

[0077] A retaining ring 107 can be provided at one end of the sliding hole 102 near the inner wall of the through hole 3. The retaining ring 107 is used to prevent the stop block 4 from sliding out of the sliding groove, and can also allow the arc surface of the limiting end of the stop block 4 to extend out of the sliding groove. In this way, one end of the stop block 4 is blocked by the retaining ring 107, and the other end is blocked by the sliding rod 5. Before the rotating shaft 1 is inserted into the through hole 3, the stop block 4 will not slide out of the sliding hole 102, thus improving the assembly efficiency.

[0078] Preferably, the first end of the slide rod 5 faces the bottom of the blind hole 103, the first end of the inclined surface 503 is close to the first end of the slide rod 5, and the other end opposite to the first end of the inclined surface 503 is the second end of the inclined surface 503.

[0079] The inclined surface 503 gradually slopes from the first end of the inclined surface 503 toward the second end of the inclined surface 503 toward the axis of the slide rod 5, and a compression spring 6 is provided between the first end face of the slide rod 5 and the bottom surface of the blind hole 103.

[0080] Example 1 of sliding rod 5 movement: When the limiting end of the stop block 4 needs to slide out of the sliding hole 102 and enter the groove 201, the sliding rod 5 moves away from the bottom of the blind hole 103 under the action of the compression spring 6. The inclined surface 503 drives the driving end of the stop block 4 to slide away from the blind hole 103 and the limiting end of the stop block 4 slides out of the sliding hole 102 and enters the groove 201. The compression spring 6 always gives the sliding rod 5 a force that makes the sliding rod 5 slide away from the bottom of the blind hole 103. When the limiting end of the stop block 4 needs to disengage from the groove 201, the sliding rod 5 is pushed to slide towards the bottom of the blind hole 103. The compression spring 6 is compressed and stores elastic potential energy. At the same time, the sliding core module 2 slides. The driving end of the stop block 4 is no longer driven by the inclined surface 503. The limiting end of the stop block 4 is driven by the core module 2 and thus the limiting end of the stop block 4 disengages from the groove 201.

[0081] This method is simple to operate. When the limiting end of the stop block 4 is engaged in the groove 201, the compression spring 6 can always push the slide rod 5, thereby preventing the limiting end of the stop block 4 from disengaging from the groove 201 due to the sliding of the slide rod 5, thus improving the stability of the stop block 4 in axial positioning of the iron core module 2.

[0082] Preferably, the first end of the slide rod 5 faces the bottom of the blind hole 103, the first end of the inclined surface 503 is close to the first end of the slide rod 5, and the other end opposite to the first end of the inclined surface 503 is the second end of the inclined surface 503.

[0083] The inclined surface 503 gradually slopes from the second end of the inclined surface 503 toward the first end of the inclined surface 503 toward the axis of the slide rod 5, and a tension spring is provided between the first end face of the slide rod 5 and the bottom surface of the blind hole 103.

[0084] Example 2 of sliding rod 5 movement (no attached diagram): When the limiting end of the stop block 4 needs to slide out of the sliding hole 102 and enter the groove 201, the sliding rod 5 moves towards the bottom of the blind hole 103 under the action of the tension spring. The inclined surface 503 drives the driving end of the stop block 4 to slide away from the blind hole 103 and the limiting end of the stop block 4 slides out of the sliding hole 102 and enters the groove 201. This process can also be pushed by external force. The tension spring always gives the sliding rod 5 a force that makes the sliding rod 5 slide towards the bottom of the blind hole 103. When the limiting end of the stop block 4 needs to disengage from the groove 201, the sliding rod 5 is pulled to slide away from the bottom of the blind hole 103. The tension spring is stretched and stores elastic potential energy. At the same time, the sliding core module 2 slides. The driving end of the stop block 4 is no longer driven by the inclined surface 503. The limiting end of the stop block 4 is driven by the core module 2 and thus the limiting end of the stop block 4 disengages from the groove 201.

[0085] This method is simple to operate. When the limiting end of the stop block 4 is engaged in the groove 201, the tension spring can always push the slide rod 5, thereby preventing the limiting end of the stop block 4 from disengaging from the groove 201 due to the sliding of the slide rod 5, thus improving the stability of the stop block 4 in axial positioning of the iron core module 2.

[0086] A locking structure can be provided between the second end of the inclined surface 503 and the second end of the slide rod 5. The locking structure is connected to the second end of the inclined surface 503, so that when the stop block 4 slides along the inclined surface 503 and is locked into the groove 201, the driving end of the stop block 4 can be just located in the locking structure. This locking structure ensures that the force exerted by the driving end of the stop block 4 on the slide rod 5 is always perpendicular to the axis of the slide rod 5.

[0087] Preferably, a stop surface 502 is provided between the first end of the inclined surface 503 and the first end of the slide rod 5. When the limiting end of the stop block 4 is engaged in the groove 201, the driving end of the stop block 4 abuts against the stop surface 502.

[0088] When the limiting end of the stop block 4 is engaged in the groove 201, the driving end of the stop block 4 abuts against the stop surface 502, causing the driving end of the stop block 4 to disengage from the inclined surface 503. Thus, the stop block 4 does not exert a force on the inclined surface 503 that would cause the slide rod 5 to slide along its own axial direction, thereby preventing the slide rod 5 from sliding axially under vibration and further ensuring the stability of the limiting end of the stop block 4 engaged in the groove 201. From the state when the limiting end of the stop block 4 is engaged in the groove 201, the stop block 4 is confined within the sliding hole 102 by the groove 201 and the stop surface 502 and cannot slide in the radial direction of the rotating shaft 1. Preferably, the stop surface 502 is connected to the first end of the inclined surface 503, allowing the driving end of the stop block 4 to immediately move to the stop surface 502 after leaving the inclined surface 503. This helps to reduce the stroke of the slide rod 5, thereby reducing the depth of the blind hole 103 and the length of the rotating shaft 1.

[0089] The stop surface 502 can be a plane parallel to the axis of the slide bar 5; the stop surface 502 can also be a part of the outer circular surface of the slide bar 5 itself.

[0090] Preferably, a first protrusion 104 is provided in the blind hole 103, and a second protrusion 501 is provided on the outer peripheral surface of the slide rod 5. The first protrusion 104 and the second protrusion 501 cooperate to prevent the slide rod 5 from sliding out of the blind hole 103.

[0091] Since the compression spring 6 always has the force to make the slide rod 5 move away from the bottom of the blind hole 103 (that is, slide out of the blind hole 103), the first protrusion 104 and the second protrusion 501 can cooperate to prevent the slide rod 5 from sliding out of the blind hole 103, thus ensuring the stability of the stop block 4's limiting end stuck in the groove 201.

[0092] Preferably, an annular groove is provided inside the blind hole 103, and an elastic retaining ring is provided inside the annular groove;

[0093] The second protrusion 501 is disposed between the second end of the slide rod 5 and the inclined surface 503. The second protrusion 501 cooperates with the elastic retaining ring to prevent the slide rod 5 from sliding out of the blind hole 103.

[0094] First, the compression spring 6 is inserted into the blind hole 103, and then the slide rod 5 is inserted into the blind hole 103 to compress the compression spring 6. When the second protrusion 501 crosses the annular groove, the elastic retaining ring is placed into the annular groove to block the second protrusion 501; the elastic retaining ring constitutes the first protrusion 104. This method facilitates the installation and disassembly of the slide rod 5, and is beneficial for later maintenance.

[0095] Preferably, the outer peripheral surface of the rotating shaft 1 is provided with a limiting groove 105 extending along the axis of the rotating shaft 1;

[0096] A third protrusion 106 is provided on the inner wall surface of the through hole 3; when the iron core module 2 slides along the rotating shaft 1, the third protrusion 106 is engaged in the limiting groove 105 and slides within the limiting groove 105.

[0097] Each core module 2 is further circumferentially limited by a third protrusion 106 that engages with a limiting groove 105. During installation, the limiting groove 105 also guides the core module 2, making installation smoother. Furthermore, the limiting groove 105 is a straight groove to facilitate the sliding of the core module 2 on the rotating shaft 1.

[0098] Preferably, the groove 201 is disposed on the third protrusion 106, and one end of the sliding hole 102 near the inner wall of the through hole 3 is located in the limiting groove 105.

[0099] The groove 201 is provided on the third protrusion 106, so that except for the third protrusion 106, the other parts are in a complete ring shape, which can ensure the integrity of the iron core module 2 and improve the magnetic permeability of the iron core module 2. Moreover, it is easier to process the groove 201 on the protruding third protrusion 106 than to process the groove 201 in other positions, reducing the processing difficulty.

[0100] When the groove 201 is set on the third protrusion 106, the end of the corresponding sliding hole 102 near the inner wall of the through hole 3 must be set in the limiting groove 105. In addition, considering the actual processing, hole structures are generally processed by drilling. Processing on a plane is more convenient and safer than processing on a curved surface. Therefore, it is safer and more convenient to speed up the sliding hole 102 in the limiting groove 105.

[0101] In addition, the positions of the groove 201 and the sliding hole 102 are mutually causal. When the sliding hole 102 is set in the limiting groove 105, the groove 201 must be set on the third protrusion 106.

[0102] Preferably, the core module 2 includes a core section composed of stacked silicon steel sheets and a first baffle 701 and a second baffle 702 disposed at both ends of the core section;

[0103] When the core module 2 is installed on the rotating shaft 1, the first baffle 701 abuts against the axial positioning part; the third protrusion 106 is located on the second baffle 702.

[0104] The iron cores are pressed together by rivets 8 passing through the first baffle 701 and the second baffle 702. To facilitate the sequential mounting of multiple iron core modules 2 onto the rotating shaft 1, the rivet holes 8 on the first baffle 701 and the second baffle 702 are countersunk, with both ends of the rivet 8 completely recessed into the countersunk holes, making the two end faces of the rotor assembly flat. This allows adjacent iron core modules 2 to fit tightly together. This avoids gaps between silicon steel sheets due to prolonged use or excessively high rotor assembly temperatures, preventing the silicon steel sheets from loosening. This fixing method is safe and reliable, and also reduces the axial length, resulting in a smaller axial dimension of the rotor assembly, which is beneficial for motor miniaturization. Since the third protrusion 106 is located on the second baffle 702, no other structure is needed on the first baffle 701. The thickness of the first baffle 701 can be smaller than the thickness of the second baffle 702, further reducing the axial dimension of the iron core module 2.

[0105] Preferably, when at least one of the core modules 2 is sequentially sleeved on the rotating shaft 1, one end of the first core module 2 sleeved on the rotating shaft 1 abuts against the axial positioning part 101; the groove 201 of the last core module 2 is opposite to the sliding hole 102.

[0106] One shaft 1 can accommodate iron core modules 2 with different outer diameters. Multiple iron core modules 2 can be combined and installed on one shaft 1, thus improving the production efficiency of the rotor assembly.

[0107] When installing a core module 2 on the rotating shaft 1: Select a rotating shaft 1 with a length suitable for a core module 2 for assembly. In the initial state, the limiting end of the stop 4 is completely located in the sliding hole 102. During assembly: The core module 2 is sleeved on the rotating shaft 1 from the second end of the rotating shaft 1. The axial positioning part 101 abuts against one end face of the core module 2, driving the slide rod 5 to move. The movement of the slide rod 5 drives the limiting end of the stop 4 to extend out of the sliding hole 102 and be inserted into the groove 201, thus completing the axial limiting of the core module 2.

[0108] When installing two iron core modules 2 on the rotating shaft 1, select a rotating shaft 1 with a length suitable for the two iron core modules 2 for assembly. During assembly: the two iron core modules 2 are successively sleeved on the rotating shaft 1 from the second end of the rotating shaft 1. The end face of the first iron core module 2 sleeved on the rotating shaft 1 abuts against the axial positioning part 101. The second iron core module 2 abuts against the first iron core module 2 axially. At this time, the drive slide rod 5 moves. The movement of the slide rod 5 drives the limiting end of the stop block 4 to extend out of the slide hole 102 and be inserted into the groove 201 of the second iron core module 2, thus completing the axial limiting of the iron core module 2.

[0109] When three or more core modules 2 are installed on the rotating shaft 1, a rotating shaft 1 of suitable length for multiple core modules 2 is selected for assembly. During assembly: multiple core modules 2 are sequentially fitted onto the rotating shaft 1 from the second end; one end face of the first core module 2 abuts against the axial positioning part 101, the second core module 2 axially abuts against the first core module 2, the third core module 2 axially abuts against the second core module 2, and so on, until the last core module 2 axially abuts against the penultimate core module 2. The groove 201 of the last core module 2 is opposite to the stop block 4, driving the slide rod 5 to move. The movement of the slide rod 5 drives the limiting end of the stop block 4 to extend out of the sliding hole 102 and engage in the groove 201 of the second core module 2, thus completing the axial limiting of the core modules 2. That is, the first core module 2 and the last core module 2 respectively complete the axial positioning with the rotating shaft 1 and clamp the other core modules 2 between them.

[0110] The same shaft 1 can also be used to accommodate iron core modules 2 with different outer diameters, as long as the outer diameter is different and the other structures are the same.

[0111] On the other hand, the present invention also provides an electric motor including the rotor assembly described above.

[0112] The rotor assembly of this motor uses a core module 2, which enables modular production of the rotor assembly. The modular rotor assembly can utilize the same shaft 1 to assemble core modules 2 of different outer diameters, and the shaft 1 can accommodate different rotor assembly outer diameters. Alternatively, multiple core modules 2 can be combined into a single core and assembled onto a corresponding shaft 1, allowing for rotor assemblies of different lengths. This enables the creation of a series of motor products, reducing the R&D costs, production difficulty, and subsequent maintenance costs associated with motor product serialization.

[0113] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. 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 the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A rotor assembly, characterized in that, include: A rotating shaft (1) has an axial positioning part (101) at its first end and a blind hole (103) at its second end. A driving component is disposed in the blind hole (103). A sliding hole (102) is provided on the rotating shaft (1) extending along the rotating shaft (1) and penetrating the blind hole (103) and the outer surface of the rotating shaft (1). A locking member is disposed in the sliding hole (102), and the locking member has a first position that partially protrudes from the sliding hole (102) and a second position that is completely accommodated in the sliding hole (102). The movement of the drive component can drive the locking member to switch between the first position and the second position; The iron core module (2) has an axial through hole (3). When the iron core module (2) is sleeved on the rotating shaft (1) through the axial through hole (3), the locking member is in the first position and can fix the iron core module (2) on the rotating shaft. When the locking member is in the second position, the iron core module (2) can slide on the rotating shaft (1). The locking element is a stop (4) that can slide within the sliding hole (102). The end of the stop (4) facing the outside of the sliding hole (102) is a limiting end. A groove (201) is provided in the through hole (3). When the stop block (4) is in the first position, the limiting end is inserted into the groove (201); when the stop block (4) is in the second position, the limiting end is disengaged from the groove (201). The drive assembly includes a slide rod (5) that slides along the axial direction of the blind hole (103) to drive the stop (4) to move; The outer peripheral surface of the slide bar (5) is provided with an inclined surface (503) extending along the axial direction of the rotating shaft (1). The first end of the slide rod (5) faces the bottom of the blind hole (103), the first end of the inclined surface (503) is close to the first end of the slide rod (5), and the other end opposite to the first end of the inclined surface (503) is the second end of the inclined surface (503). The inclined plane (503) gradually slopes from the first end of the inclined plane (503) toward the second end of the inclined plane (503) toward the axis of the slide rod (5); A stop surface (502) is provided between the first end of the inclined surface (503) and the first end of the slide rod (5). When the limiting end of the stop block (4) is inserted into the groove (201), the driving end of the stop block (4) abuts against the stop surface (502).

2. The rotor assembly according to claim 1, characterized in that, The end of the stop block (4) facing the outside of the sliding hole (102) is a limiting end, and the end face of the limiting end is an arc surface.

3. The rotor assembly according to claim 1, characterized in that, When the slide bar (5) moves along the axial direction of the rotating shaft (1), the inclined surface (503) can drive the stop (4) to slide along the axial direction of the sliding hole (102) within the sliding hole (102).

4. The rotor assembly according to claim 3, characterized in that, A compression spring (6) is provided between the first end face of the slide bar (5) and the bottom surface of the blind hole (103).

5. The rotor assembly according to claim 3, characterized in that, The first end of the slide rod (5) faces the bottom of the blind hole (103), the first end of the inclined surface (503) is close to the first end of the slide rod (5), and the other end opposite to the first end of the inclined surface (503) is the second end of the inclined surface (503). The inclined plane (503) gradually tilts from the first end of the inclined plane (503) toward the second end of the inclined plane (503) toward the axis of the slide rod (5), instead, the inclined plane (503) gradually tilts from the second end of the inclined plane (503) toward the first end of the inclined plane (503) toward the axis of the slide rod (5); A tension spring is provided between the first end face of the slide bar (5) and the bottom surface of the blind hole (103).

6. The rotor assembly according to claim 3, characterized in that, A first protrusion (104) is provided inside the blind hole (103), and a second protrusion (501) is provided on the outer peripheral surface of the slide rod (5). The first protrusion (104) and the second protrusion (501) cooperate to prevent the slide rod (5) from sliding out of the blind hole (103).

7. The rotor assembly according to claim 6, characterized in that, An annular groove is provided inside the blind hole (103), and an elastic retaining ring is provided inside the annular groove; The second protrusion (501) is disposed between the second end of the slide rod (5) and the inclined surface (503). The second protrusion (501) cooperates with the elastic retaining ring to prevent the slide rod (5) from sliding out of the blind hole (103).

8. The rotor assembly according to claim 1, characterized in that, The outer peripheral surface of the rotating shaft (1) is provided with a limiting groove (105) extending along the axis of the rotating shaft (1). A third protrusion (106) is provided on the inner wall surface of the through hole (3); when the iron core module (2) slides along the rotating shaft (1), the third protrusion (106) is engaged in the limiting groove (105) and slides in the limiting groove (105).

9. The rotor assembly according to claim 8, characterized in that, The groove (201) is provided on the third protrusion (106), and one end of the sliding hole (102) near the inner wall of the through hole (3) is located in the limiting groove (105).

10. The rotor assembly according to claim 9, characterized in that, The core module (2) includes a core section composed of stacked silicon steel sheets and a first baffle (701) and a second baffle (702) disposed at both ends of the core section. When the core module (2) is installed on the rotating shaft (1), the first baffle (701) abuts against the axial positioning part; the third protrusion is located on the second baffle (702).

11. The rotor assembly according to claim 1, characterized in that, When at least one of the core modules (2) is sequentially mounted on the rotating shaft (1), one end of the first core module (2) mounted on the rotating shaft (1) abuts against the axial positioning part (101); the groove (201) of the last core module (2) is opposite to the sliding hole (102).

12. An electric motor, characterized in that, Includes the rotor assembly according to any one of claims 1-11.

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