Fastening connection structure, rotor core and stator core

Abstract

This application relates to a fastening connection structure, a rotor core, and a stator core, belonging to the field of motor technology. The fastening connection structure includes a snap-fit ​​ring and a locking member. The locking member includes a ring limiting portion, which restricts relative movement between the snap-fit ​​ring and the locking member, thereby limiting and locking the snap-fit ​​ring. The solution provided by this application, because the locking member has a ring limiting portion, can restrict relative movement between the snap-fit ​​ring and the locking member, thereby enabling a tight and secure connection between the first and second components to be connected, which are equipped with the fastening connection structure of this application.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to fastening connection structures, rotor cores and stator cores. Background Technology

[0002] The rotor core is an extremely important component of an electric motor, typically made by stacking rotor laminations stamped from silicon steel sheets. Common rotor cores use a convex-concave interlocking structure for positioning and relative fixation. Without plastic coating, the gaps between the rotor laminations will gradually widen over prolonged operation, causing motor reliability issues. However, if plastic coating is used, it increases the rotor's size and weight, hindering the miniaturization of electric motors.

[0003] In addition, the stator core is also an extremely important component of the motor. It is usually made by stacking rotor laminations stamped from silicon steel sheets. Common stator cores, in addition to using a concave-convex snap-fit ​​structure for positioning and stacking, either undergo a plastic coating process to further fix the stator core, or are uniformly welded around the stator core to make the connection between the stator laminations more reliable. However, both of the above methods increase the motor manufacturing time and manufacturing cost.

[0004] Therefore, it is necessary to design a fastening connection structure that can tightly lock the rotor laminations or stator laminations without further processing of the rotor core or stator core through plastic coating. This would enable a tight and secure connection between the rotor laminations and stator laminations. In addition, the application areas of this snap fastener include, but are not limited to, rotor laminations and stator laminations. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, this application provides a fastening connection structure that can tightly lock the rotor laminations or stator laminations without requiring further processing of the rotor core or stator core through plastic coating, thus enabling a tight and secure connection between the rotor laminations and stator laminations.

[0006] The first aspect of this application provides a fastening connection structure, including a snap ring platform and a locking element;

[0007] The locking member includes a ring limiting part, which is used to limit the movement of the buckle ring in a direction perpendicular to the surface of the locking member.

[0008] In one embodiment, the locking member further includes a mounting plane portion, and the ring platform limiting portion includes a limiting vertical block and a limiting horizontal block, with one end of the limiting vertical block connected to the mounting plane portion and the other end connected to the limiting horizontal block.

[0009] In one embodiment, the minimum distance from the limiting cross block to the mounting plane is consistent with the thickness of the snap ring platform.

[0010] In one embodiment, the snap ring includes a ring portion and an inner hole portion, and the ring limiting portion passes through the inner hole portion to abut and limit the ring portion.

[0011] A second aspect of this application provides a rotor core, the rotor core including the fastening connection structure mentioned in the above embodiments.

[0012] In one embodiment, the rotor core includes a plurality of overlapping first rotor laminations. Each first rotor lamination is provided with a snap ring platform and a locking member. The first rotor laminations are overlapped and locked by the snap ring platform engaging with the locking member of the adjacent first rotor lamination.

[0013] In one embodiment, the first rotor lamination has a first rotor hole and a second rotor hole, the snap ring platform is connected to the edge of the first rotor hole via a connecting bridge, the locking member is provided on the edge of the second rotor hole, and the size of the second rotor hole is the same as the size of the inner hole of the snap ring platform.

[0014] In one embodiment, the rotor core further includes a second rotor lamination, which is placed between two adjacent first rotor laminations. The second rotor lamination has a third rotor hole, the size of which is consistent with the outer periphery of the snap ring portion, and the thickness of the snap ring is consistent with the thickness of the second rotor lamination.

[0015] In one embodiment, the rotor core further includes a third rotor lamination and a fourth rotor lamination, the third rotor lamination and the fourth rotor lamination being respectively disposed at both ends of the rotor core, the third rotor lamination being provided with the snap ring platform, and the fourth rotor lamination being provided with the locking element.

[0016] A third aspect of this application provides a stator core, the stator core including the fastening connection structure mentioned in the above embodiments.

[0017] In one embodiment, the stator core includes a plurality of overlapping first stator laminations. Each first stator lamination is provided with a snap ring platform and a locking member. The first stator laminations are overlapped and locked by the snap ring platform engaging with the locking member of the adjacent first stator lamination.

[0018] In one embodiment, the first stator lamination is provided with a first stator hole and a second stator hole, the snap ring platform is connected to the edge of the first stator hole via a connecting bridge, the locking member is provided on the edge of the second stator hole, and the size of the second stator hole is consistent with the size of the inner hole of the snap ring platform.

[0019] In one embodiment, the stator core further includes a second stator lamination, which is placed between two adjacent first stator laminations. The second stator lamination has a third stator hole, the size of which is consistent with the outer perimeter of the ring portion of the snap ring, and the thickness of the snap ring is consistent with the thickness of the second stator lamination.

[0020] In one embodiment, the stator core further includes a third stator lamination and a fourth stator lamination, the third stator lamination and the fourth stator lamination being respectively disposed at both ends of the stator core, the third stator lamination being provided with the snap ring platform, and the fourth stator lamination being provided with the locking element.

[0021] The technical solution provided in this application has the following beneficial effects:

[0022] The fastening connection structure of this application includes a snap-fit ​​ring and a locking member. The locking member includes a ring limiting part, which is used to limit the movement of the snap-fit ​​ring in any direction on the surface of the locking member.

[0023] The fastening connection structure of this application has a ring-shaped limiting part on the locking component. The ring-shaped limiting part can limit the relative movement between the snap ring and the locking component, that is, it can limit the snap ring in the horizontal or vertical direction. In other words, the locking component can lock and limit the snap ring. This allows the first and second parts to be connected to be tightly and firmly connected with the fastening connection structure of this application. For example, if the rotor lamination or stator lamination is provided with this fastening connection structure, a tight and firm connection can be achieved through this fastening connection structure without the need for further reinforcement of the connection through other processes.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0025] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0026] Figure 1 This is a schematic diagram of the fastening connection structure shown in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the structure of the snap-fit ​​ring platform shown in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the locking component shown in the embodiments of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the first rotor lamination (broken bridge) shown in an embodiment of this application;

[0030] Figure 5 This is another structural schematic diagram of the first rotor lamination (broken bridge) shown in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram of the structure of the first rotor lamination (full bridge) shown in an embodiment of this application;

[0032] Figure 7 This is another structural schematic diagram of the first rotor lamination (full bridge) shown in the embodiments of this application;

[0033] Figure 8 This is a schematic diagram of the structure of the second rotor lamination (full bridge) shown in an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of the structure of the second rotor lamination (broken bridge) shown in an embodiment of this application;

[0035] Figure 10 This is a schematic diagram of the structure of the third rotor lamination shown in the embodiments of this application;

[0036] Figure 11 This is another structural schematic diagram of the third rotor lamination shown in the embodiments of this application;

[0037] Figure 12 This is a schematic diagram of the structure of the fourth rotor lamination shown in the embodiments of this application;

[0038] Figure 13 This is another structural schematic diagram of the fourth rotor lamination shown in the embodiments of this application;

[0039] Figure 14 This is a schematic diagram of the rotor core structure shown in the embodiments of this application;

[0040] Figure 15 This is another structural schematic diagram of the rotor core shown in the embodiments of this application;

[0041] Figure 16 This is a schematic diagram of the structure of the first stator lamination shown in the embodiment of this application;

[0042] Figure 17 This is a schematic diagram of the structure of the second stator lamination shown in the embodiments of this application;

[0043] Figure 18 This is a schematic diagram of the structure of the third stator lamination shown in the embodiments of this application;

[0044] Figure 19This is a schematic diagram of the structure of the fourth stator lamination shown in the embodiments of this application;

[0045] Figure 20 This is a schematic diagram of the stator core structure shown in the embodiments of this application;

[0046] Figure 21 This is a schematic diagram of the locking member in a pressed state as shown in an embodiment of this application;

[0047] Figure 22 This is a schematic diagram of the locking member in the second pressed state as shown in the embodiments of this application;

[0048] Figure 23 This is a schematic diagram of the locking member in the third pressing state as shown in the embodiment of this application.

[0049] Figure label:

[0050] 1. Snap-fit ​​ring platform; 101. Ring platform section; 102. Inner hole section; 2. Locking component; 21. Ring platform limiting section; 211. Limiting vertical block; 212. Limiting horizontal block; 22. Mounting plane section; 3. First rotor lamination; 31. Connecting bridge; 4. Second rotor lamination; 41. Third rotor hole; 5. Third rotor lamination; 6. Fourth rotor lamination; 7. First stator lamination; 8. Second stator lamination; 81. Third stator hole; 9. Third stator lamination; 10. Fourth stator lamination; 11. Rotor core; 12. Stator core; 13. Magnet; 14. Snap-fit ​​point. Detailed Implementation

[0051] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0052] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0053] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] Example 1

[0055] The rotor core is an extremely important component of an electric motor, typically made by stacking rotor laminations stamped from silicon steel sheets. Common rotor cores use a convex-concave interlocking structure for positioning and relative fixation. Without plastic coating, the gaps between the rotor laminations will gradually widen over prolonged operation, causing motor reliability issues. However, if plastic coating is used, it increases the rotor's size and weight, hindering the miniaturization of electric motors.

[0056] In addition, the stator core is also an extremely important component of the motor. It is usually made by stacking rotor laminations stamped from silicon steel sheets. Common stator cores, in addition to using a concave-convex snap-fit ​​structure for positioning and stacking, either undergo a plastic coating process to further fix the stator core, or are uniformly welded around the stator core to make the connection between the stator laminations more reliable. However, both of the above methods increase the motor manufacturing time and manufacturing cost.

[0057] Therefore, it is necessary to design a fastening connection structure that can tightly lock the rotor laminations or stator laminations without further processing of the rotor core or stator core through plastic coating. This would enable a tight and secure connection between the rotor laminations and stator laminations. In addition, the application areas of this snap fastener include, but are not limited to, rotor laminations and stator laminations.

[0058] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0059] Figure 1 This is a schematic diagram of the fastening connection structure shown in the embodiments of this application;

[0060] Figure 2 This is a schematic diagram of the structure of the snap-fit ​​ring platform shown in the embodiments of this application;

[0061] Figure 3 This is a schematic diagram of the locking component shown in the embodiments of this application.

[0062] See Figure 1 , Figure 2 and Figure 3.

[0063] The fastening connection structure of this application embodiment includes a snap ring platform 1 and a locking member 2. The snap ring platform 1 can be disposed on the first part to be connected, and the locking member 2 can be disposed on the second part to be connected, so that the first part to be connected and the second part to be connected can be connected by the snap ring platform 1 and the locking member 2. The first part to be connected and the second part to be connected are not limited in this application, including but not limited to rotor laminations and stator laminations.

[0064] The size and shape of the snap-fit ​​ring 1 are not limited in this application. The snap-fit ​​ring 1 has an annular stepped structure, including a ring 101 and an inner hole 102. The ring limiting part 21 can pass through the inner hole 102 to abut and limit the ring 101. This application embodiment does not limit the structure and size of the inner hole 102 and the ring 101. For example, the ring 101 is an annular stepped structure formed by an inner circle and an outer circle, and the inner circle of the ring 101 forms an inner hole, which is the inner hole 102.

[0065] The locking member 2 includes a ring limiting part 21, which limits the relative movement between the buckling ring and the locking member 2.

[0066] The ring platform limiting part 21 is provided with a limiting space for the buckling ring platform 1, and the limiting space limits and locks the buckling ring platform 1.

[0067] The fastening connection structure of this application has a ring-shaped limiting part 21 provided in the locking member 2. The ring-shaped limiting part 21 has a limiting space for the snap-fit ​​ring 1, so that the ring-shaped limiting part 21 can limit the relative movement between the snap-fit ​​ring 1 and the locking member 2. The relative movement includes movement in the vertical direction and the horizontal direction, that is, it can limit the snap-fit ​​ring 1 in the horizontal or vertical direction. For example, the limiting space of this application limits the snap-fit ​​ring 1 in the vertical direction. After the limiting is completed, the locking member 2 can lock the snap-fit ​​ring 1, thereby enabling the first and second parts to be connected, which are provided with the fastening connection structure of this application, to be tightly and firmly connected. For example, if the rotor lamination or stator lamination is provided with this fastening connection structure, a tight and firm connection can be achieved through this fastening connection structure, without the need for further reinforcement of its connection through other processes.

[0068] The beneficial effects of the embodiments of this application are as follows: Since the fastening connection structure is provided with a ring limiting part in the locking member, the ring limiting part can limit the movement of the buckling ring in any direction on the surface of the locking member. That is, the locking member can lock and limit the buckling ring, thereby enabling the first and second parts to be connected to be connected with the fastening connection structure of this application to be tightly and firmly connected. For example, if the rotor lamination or stator lamination is provided with this fastening connection structure, it can be tightly and firmly connected through this fastening connection structure, without the need for further reinforcement of its connection firmness through other processes.

[0069] Example 2

[0070] This application embodiment will further describe the structural design of the fastening connection structure, which includes a snap ring platform 1 and a locking member 2.

[0071] The locking member 2 includes a ring platform limiting part 21, which has a limiting space for the buckling ring platform 1. The limiting space limits the buckling ring platform 1, so that the locking member 2 limits and locks the buckling ring platform 1.

[0072] Furthermore, the locking component 2 also includes a mounting plane portion 22, and the ring platform limiting portion 21 includes a connected limiting vertical block 211 and a limiting horizontal block 212. Furthermore, the limiting vertical block 211 and the limiting horizontal block 212 are integrally formed. One end of the limiting vertical block 211 is connected to the mounting plane portion 22, and the limiting horizontal block 212 is disposed at the other end of the limiting vertical block 211. The limiting horizontal block 212 and the mounting plane portion 22 constitute a limiting space in the vertical direction of the buckling ring platform 1.

[0073] The minimum distance between the limiting horizontal block 212 and the mounting plane 22 is consistent with the thickness of the snap ring 1. The thickness in this application refers to the size along the vertical direction. The snap ring 1 is set on the connecting hole of the first component to be connected, so that the ring limiting part 21 can pass through the inner hole 102 to abut and limit the ring part 101.

[0074] For example, the mounting surface 22 may be part of the second member to be connected, that is, the second member to be connected may be used directly as the mounting surface 22.

[0075] Furthermore, the preparation method of the ring limiting part 21 is exemplarily described in this application. The specific method of how to set the locking member 2 on the second part to be connected or the mounting plane part 22 is within the scope of protection of this application. For example, a connecting hole is provided on the second part to be connected, and a spring plate of the same material as the second part to be connected and connected to it is stamped out in the connecting hole using a stamping die. Figure 21As shown, the stamping die is equipped with a radially expandable stamping cylinder, the diameter of which when contracted is the same as the diameter of the connecting hole on the second part to be connected. This stamping cylinder first presses out a limiting vertical block 211 from the scaffold structure along a direction perpendicular to the plane where the connecting hole is located, as shown. Figure 22 As shown, the stamped cylinder is then extended radially, thereby pushing the scaffold structure outward, causing it to flip outward and form the limiting cross block 212, as shown. Figure 23 As shown.

[0076] Furthermore, the locking element 2 of the fastening connection structure can be pressed when it is snapped together with the first part to be connected, or it can be pressed in advance to perform snap-locking.

[0077] When the locking member 2 is pressed to make a snap-fit ​​connection with the first part to be connected, the connecting hole of the second part to be connected can be aligned with the inner hole 102 of the snap-fit ​​ring platform 1. Then, the limiting vertical block 211 is pressed out of the jump plate structure using a stamping die. Then, the jumping plate structure is pushed outward by the stamping die to make it flip outward and form the limiting horizontal block 212, thereby locking the locking member 2 to lock the snap-fit ​​ring platform 1.

[0078] The beneficial effects of this application's embodiments are as follows: A vertical limiting block and a horizontal limiting block are integrally formed. The vertical limiting block is connected to the mounting surface, and the horizontal limiting block is located at one end of the vertical limiting block. The horizontal limiting block and the mounting surface together form a vertical limiting space for the locking ring platform. The minimum distance from the horizontal limiting block to the mounting surface is consistent with the thickness of the locking ring platform, thereby enabling a tight and secure locking of the locking ring platform.

[0079] Example 3

[0080] Corresponding to Embodiments 1 and 2 above, this application embodiment also includes a rotor core, which includes the fastening connection structure of the above embodiments.

[0081] Figure 4 This is a schematic diagram of the structure of the first rotor lamination (broken bridge) shown in an embodiment of this application;

[0082] Figure 5 This is another structural schematic diagram of the first rotor lamination (broken bridge) shown in the embodiments of this application;

[0083] Figure 6 This is a schematic diagram of the structure of the first rotor lamination (full bridge) shown in an embodiment of this application;

[0084] Figure 7 This is another structural schematic diagram of the first rotor lamination (full bridge) shown in the embodiments of this application;

[0085] Figure 8 This is a schematic diagram of the structure of the second rotor lamination (full bridge) shown in an embodiment of this application;

[0086] Figure 9 This is a schematic diagram of the structure of the second rotor lamination (broken bridge) shown in an embodiment of this application;

[0087] Figure 10 This is a schematic diagram of the structure of the third rotor lamination shown in the embodiments of this application;

[0088] Figure 11 This is another structural schematic diagram of the third rotor lamination shown in the embodiments of this application;

[0089] Figure 12 This is a schematic diagram of the structure of the fourth rotor lamination shown in the embodiments of this application;

[0090] Figure 13 This is another structural schematic diagram of the fourth rotor lamination shown in the embodiments of this application;

[0091] Figure 14 This is a schematic diagram of the rotor core structure shown in the embodiments of this application;

[0092] Figure 15 This is another schematic diagram of the rotor core structure shown in the embodiments of this application.

[0093] See Figures 4 to 15 .

[0094] The rotor core 11 includes several first rotor laminations 3 that are stacked together. Each first rotor lamination 3 is provided with a snap ring platform 1 and a locking member 2. The first rotor laminations 3 are stacked and locked together by the snap ring platform 1 and the locking member 2 of the adjacent first rotor laminations 3.

[0095] In this embodiment, the number of snap ring platforms 1 and locking members 2 provided on the first rotor lamination 3 is not limited. For example, the number of snap ring platforms 1 provided on the first rotor lamination 3 should be the same as the number of locking members 2 of the adjacent rotor lamination. For example, the number of snap ring platforms 1 provided on the first rotor lamination 3 is 4, and the number of locking members 2 of the adjacent rotor lamination is 4.

[0096] The first rotor lamination 3 is provided with a first rotor hole and a second rotor hole. The snap ring platform 1 is connected to the edge of the first rotor hole through the connecting bridge 31. The locking member 2 is provided on the edge of the second rotor hole. The size of the second rotor hole is consistent with the size of the inner hole 102.

[0097] The rotor core 11 also includes a second rotor lamination 4, which is placed between two adjacent first rotor laminations 3. The second rotor lamination 4 is provided with a third rotor hole 41, the size of which is consistent with the outer periphery of the ring platform 101, and the thickness of the snap ring platform 1 is consistent with the thickness of the second rotor lamination 4.

[0098] The third rotor hole 41 corresponds to the first rotor hole of the first rotor lamination 3.

[0099] The snap ring platform 1 is connected to the edge of the first rotor hole via the connecting bridge 31. The thickness of the snap ring platform 1 is the same as the thickness of the second rotor lamination 4.

[0100] When stamping the second rotor lamination 4, the third rotor hole 41 is directly stamped using a stamping die. The size of the third rotor hole 41 is consistent with the outer dimensions of the ring platform 101. The third rotor hole 41 corresponds to the first rotor hole of the first rotor lamination 3. That is, when the second rotor lamination 4 is stacked on the first rotor lamination 3, the third rotor hole 41 is fitted onto the snap ring platform 1.

[0101] When stamping the first rotor lamination 3, the second rotor hole is directly punched out using a stamping die.

[0102] A springboard connected to the second rotor hole is stamped out in the second rotor hole using a stamping die. After the second rotor lamination 4 is aligned with the two first rotor laminations 3, the stamping die is equipped with a radially expandable stamping cylinder. The diameter of the stamping cylinder when it is contracted is the diameter of the second rotor hole. The stamping cylinder first presses the springboard structure into a limiting vertical block 211 in a direction perpendicular to the plane where the second rotor hole is located. Then, the stamping cylinder is allowed to extend radially, thereby pushing the springboard structure outward and causing it to flip outward to form a limiting horizontal block 212. The limiting horizontal block 212 abuts against the snap ring 1, so that the second rotor lamination 4 and the first rotor lamination 3 are restricted within the limiting space of the ring limiting part 21. The second rotor lamination 4 is snapped and connected to the first rotor laminations 3 on both sides.

[0103] The rotor core 11 also includes a third rotor lamination 5 and a fourth rotor lamination 6. The third rotor lamination 5 and the fourth rotor lamination 6 are respectively located at both ends of the rotor core 11. The third rotor lamination 5 is provided with a snap ring platform 1, and the fourth rotor lamination 6 is provided with a locking element 2.

[0104] For example, the rotor laminations in this application embodiment are formed by stamping silicon steel sheets. The silicon steel sheets are stamped according to size and shape requirements using a stamping die. In addition to the fastening connection structure mentioned above, the first rotor lamination 3, the second rotor lamination 4, the third rotor lamination 5, and the fourth rotor lamination 6 in this application embodiment also have a number of fastening points 14 in the plane of the rotor lamination. The fastening points 14 are evenly distributed on the circumference of three circles. The three circles have the same center as the rotor lamination but different diameters.

[0105] Furthermore, the third rotor lamination 5 and the fourth rotor lamination 6 are respectively located at both ends of the rotor core 11. The third rotor lamination 5 and the fourth rotor lamination 6 do not have magnetic tile slots and adopt a sealed hole structure to control the axial movement of the magnetic tile 13.

[0106] Furthermore, the first rotor lamination 3 includes a full-bridge first rotor lamination 3 and a broken-bridge first rotor lamination 3. The full-bridge first rotor lamination 3 and the broken-bridge first rotor lamination 3 are punched with magnetic tile slots according to the shape and size of the magnetic tile 13 to facilitate the embedding of the magnetic tile 13. The full-bridge first rotor lamination 3 is a rotor lamination with a completely connected outer circumference of the first rotor lamination 3. The full-bridge first rotor lamination 3 can improve the structural rigidity of the rotor when rotating at high speed.

[0107] Furthermore, the first rotor lamination 3 with a broken bridge has an opening on its outer circumference at the slot of the magnetic tile. The first rotor lamination 3 with a broken bridge can improve rotor performance and reduce magnetic leakage of the magnetic tile 13.

[0108] Furthermore, the second rotor lamination 4 includes a full-bridge second rotor lamination 4 and a broken-bridge second rotor lamination 4. The full-bridge second rotor lamination 4 and the broken-bridge second rotor lamination 4 are punched with magnetic tile slots according to the shape and size of the magnetic tile 13, so as to facilitate the embedding of the magnetic tile 13.

[0109] The second rotor lamination 4 of the full bridge is a rotor lamination whose outer circumference is completely connected; the second rotor lamination 4 of the full bridge can improve the structural rigidity of the rotor when it rotates at high speed.

[0110] The second rotor lamination 4 with a broken bridge has an opening on its outer circumference at the slot of the magnetic tile. The second rotor lamination 4 with a broken bridge can improve rotor performance and reduce magnetic leakage of the magnetic tile 13.

[0111] Furthermore, the rotor core 11 is formed by stacking the third rotor lamination 5 and the fourth rotor lamination 6 at both ends, as well as the first rotor lamination 3 and the second rotor lamination 4 between the third rotor lamination 5 and the fourth rotor lamination 6. The number of the fourth rotor lamination 6, the third rotor lamination 5, the first rotor lamination 3, and the second rotor lamination 4 depends on the actual production application.

[0112] The middle part of the rotor core 11 consists of the first rotor lamination 3 and the second rotor lamination 4 between the third rotor lamination 5 and the fourth rotor lamination 6. The middle part of the rotor core 11 can be divided into multiple rotor lamination groups, and each rotor lamination group is formed by stacking multiple first rotor laminations 3 and second rotor laminations 4 in sequence.

[0113] After the rotor core 11 is stacked in the middle, the magnetic tiles 13 are embedded into the rotor core 11 in sequence as required. Then, the fourth rotor lamination 6 and the third rotor lamination 5 are stamped and connected to the middle of the rotor core 11 through a fastening connection structure to form a fastened and tightly connected rotor core 11.

[0114] The beneficial effects of the embodiments of this application are as follows: The first rotor lamination of the rotor core includes a full-bridge first rotor lamination and a broken-bridge first rotor lamination. The full-bridge first rotor lamination and the broken-bridge first rotor lamination are punched with magnetic tile slots according to the shape and size of the magnetic tile to facilitate the embedding of the magnetic tile.

[0115] The first rotor lamination of the full-bridge rotor can improve the structural rigidity of the rotor when it rotates at high speed;

[0116] The first rotor lamination with a broken bridge can improve rotor performance and reduce magnetic leakage from the magnet.

[0117] The second rotor lamination of the full-bridge rotor can improve the structural rigidity of the rotor when it rotates at high speed;

[0118] The second rotor lamination with a broken bridge can improve rotor performance and reduce magnetic leakage from the magnet.

[0119] The third and fourth rotor laminations are located at both ends of the rotor core, without magnetic tile slots, and employ a sealed hole structure to control the axial movement of the magnetic tiles.

[0120] Example 4

[0121] Corresponding to Embodiments 1 and 2 above, this application embodiment also includes a stator core, which includes the fastening connection structure of the above embodiments.

[0122] Figure 16 This is a schematic diagram of the structure of the first stator lamination shown in the embodiment of this application;

[0123] Figure 17 This is a schematic diagram of the structure of the second stator lamination shown in the embodiments of this application;

[0124] Figure 18 This is a schematic diagram of the structure of the third stator lamination shown in the embodiments of this application;

[0125] Figure 19 This is a schematic diagram of the structure of the fourth stator lamination shown in the embodiments of this application;

[0126] Figure 20 This is a schematic diagram of the stator core structure shown in the embodiments of this application;

[0127] See Figures 16 to 20 .

[0128] In this embodiment of the application, the stator core 12 has several overlapping first stator laminations 7. Each first stator lamination 7 is provided with a snap ring platform 1 and a locking member 2. The first stator laminations 7 are overlapped and locked by the snap ring platform 1 and the locking member 2 of the adjacent first stator laminations 7.

[0129] In this embodiment of the application, the number of snap ring platforms 1 and locking members 2 provided on the first stator lamination 7 is not limited. For example, the number of snap ring platforms 1 provided on the first stator lamination 7 should be the same as the number of locking members 2 of the adjacent stator laminations. For example, the number of snap ring platforms 1 provided on the first stator lamination 7 is 4, and the number of locking members 2 of the adjacent stator laminations is 4.

[0130] The first stator lamination 7 is provided with a first stator hole and a second stator hole. The snap ring platform 1 is connected to the edge of the first stator hole through the connecting bridge 31. The locking member 2 is provided on the edge of the second stator hole. The size of the second stator hole is the same as the size of the inner hole 102.

[0131] The stator core 12 also includes a second stator lamination 8, which is placed between two adjacent first stator laminations 7. The second stator lamination 8 is provided with a third stator hole 81, the size of which is consistent with the outer periphery of the ring platform 101, and the thickness of the snap ring platform 1 is consistent with the thickness of the second stator lamination 8.

[0132] The third stator hole 81 corresponds to the first stator hole of the first stator lamination 7.

[0133] The stator core 12 also includes a third stator lamination 9 and a fourth stator lamination 10. The third stator lamination 9 and the fourth stator lamination 10 are respectively located at both ends of the stator core 12. The third stator lamination 9 is provided with a snap ring platform 1, and the fourth stator lamination 10 is provided with a locking element 2.

[0134] For example, the stator laminations in this application embodiment are formed by stamping silicon steel sheets. The silicon steel sheets are stamped according to size and shape requirements using a stamping die. In addition to the fastening connection structure mentioned above, the first stator lamination 7, the second stator lamination 8, the third stator lamination 9, and the fourth stator lamination 10 in this application embodiment also have a plurality of fastening points 14 in the plane of the stator lamination. The fastening points 14 are evenly distributed on the circumference of two circles, which have the same center as the stator lamination but different diameters.

[0135] Furthermore, the stator core 12 is formed by stacking the third stator laminations 9 and the fourth stator laminations 10 at both ends, as well as the first stator laminations 7 and the second stator laminations 8 between the third stator laminations 9 and the fourth stator laminations 10. The number of the first stator laminations 7 and the second stator laminations 8 between the third stator laminations 9 and the fourth stator laminations 10 depends on the actual production application.

[0136] The middle part of the stator core 12 includes the first stator lamination 7 and the second stator lamination 8 between the third stator lamination 9 and the fourth stator lamination 10.

[0137] After the middle part of the stator core 12 is stacked, the magnetic tiles 13 are embedded into the stator core 12 in sequence as required. Then, the fourth stator lamination 10 and the third stator lamination 9 are stamped and connected to the middle part of the stator core 12 through a fastening connection structure to form a fastened and tightly connected stator core 12.

[0138] The snap ring platform 1 is connected to the edge of the first stator hole via the connecting bridge 31. The thickness of the snap ring platform 1 is the same as the thickness of the second stator lamination 8.

[0139] When stamping the second stator lamination 8, the third stator hole 81 is directly stamped using a stamping die. The diameter of the third stator hole 81 is the same as the outer diameter of the snap ring platform 1. The third stator hole 81 corresponds to the first stator hole of the first stator lamination 7. That is, when the second stator lamination 8 is stacked on the first stator lamination 7, the third stator hole 81 is fitted onto the snap ring platform 1.

[0140] When stamping the first stator lamination 7, the second stator hole is directly punched out using a stamping die.

[0141] A spring plate connected to the second stator hole is stamped out using a stamping die, such as... Figure 21 As shown, after the second stator lamination 8 is aligned with the two first stator laminations 7, a radially expandable stamping cylinder is provided in the stamping die. The diameter of the stamping cylinder when it contracts is the same as the diameter of the second stator hole. This stamping cylinder first presses out a limiting vertical block 211 along the direction perpendicular to the plane where the second rotor hole is located, as shown. Figure 22 As shown, the stamped cylinder is then extended radially, thereby pushing the scaffold structure outward, causing it to flip outward and form the limiting cross block 212, as shown. Figure 23 As shown, the limiting block 212 abuts against the buckling ring 1, so that the second stator lamination 8 and the first stator lamination 7 are restricted within the limiting space of the ring limiting part 21, and the second stator lamination 8 is clamped with the first stator laminations 7 on both sides.

[0142] The beneficial effects of the embodiments of this application are as follows: the fourth stator lamination of the stator core and the first and second stator laminations between the third and fourth stator laminations can form a tight and closely connected stator core through a fastening connection structure. When the stator laminations are punched using a hydraulic punch press, a fastening connection structure is punched on the stator laminations. The stator laminations can achieve a locking effect through the fastening connection structure, so that the dispersed stator laminations can form a tightly connected stator core.

[0143] Example 5

[0144] This application provides an electric motor, which includes the rotor core 11 and stator core 12 of the above embodiments. The derivation process of its beneficial effects is the same as that of the above embodiments, and will not be repeated here.

[0145] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A rotor core, characterized in that, The rotor core (11) includes a fastening connection structure, which includes a snap ring platform (1) and a locking element (2); The locking member (2) includes a ring platform limiting part (21), which is used to limit the relative movement of the buckle ring platform (1) and the locking member (2); The locking member (2) also includes a mounting plane (22), and the ring platform limiting part (21) includes a limiting vertical block (211) and a limiting horizontal block (212). One end of the limiting vertical block (211) is connected to the mounting plane (22), and the other end is connected to the limiting horizontal block (212). The buckle ring (1) includes a ring section (101) and an inner hole section (102), and the ring limiting section (21) passes through the inner hole section (102) to abut and limit the ring section (101); The rotor core (11) includes a plurality of first rotor laminations (3) stacked together. The first rotor laminations (3) are provided with the snap ring platform (1) and the locking member (2). The first rotor laminations (3) are stacked and locked together by the snap ring platform (1) and the locking member (2) of the adjacent first rotor laminations (3). The rotor core (11) also includes a second rotor lamination (4), which is placed between two adjacent first rotor laminations (3). The second rotor lamination (4) is provided with a third rotor hole (41), the size of which is consistent with the outer periphery of the ring platform (101) of the snap ring platform (1), and the thickness of the snap ring platform (1) is consistent with the thickness of the second rotor lamination (4).

2. The rotor core according to claim 1, characterized in that, The The first rotor lamination (3) is provided with a first rotor hole and a second rotor hole. The snap ring platform (1) is connected to the edge of the first rotor hole through a connecting bridge (31). The locking member (2) is provided on the edge of the second rotor hole. The size of the second rotor hole is consistent with the size of the inner hole (102) of the snap ring platform (1).

3. The rotor core according to claim 1, characterized in that, The rotor core (11) also includes a third rotor lamination (5) and a fourth rotor lamination (6). The third rotor lamination (5) and the fourth rotor lamination (6) are respectively located at both ends of the rotor core (11). The third rotor lamination (5) is provided with the snap ring platform (1), and the fourth rotor lamination (6) is provided with the locking member (2).

4. The rotor core according to claim 1, characterized in that, The minimum distance from the limiting horizontal block (212) to the mounting plane (22) is consistent with the thickness of the buckle ring (1).

5. A stator core, characterized in that, The stator core (12) includes a fastening connection structure, which includes a snap ring platform (1) and a locking element (2); The locking member (2) includes a ring platform limiting part (21), which is used to limit the relative movement of the buckle ring platform (1) and the locking member (2); The locking member (2) also includes a mounting plane (22), and the ring platform limiting part (21) includes a limiting vertical block (211) and a limiting horizontal block (212). One end of the limiting vertical block (211) is connected to the mounting plane (22), and the other end is connected to the limiting horizontal block (212). The buckle ring (1) includes a ring section (101) and an inner hole section (102), and the ring limiting section (21) passes through the inner hole section (102) to abut and limit the ring section (101); The stator core (12) includes a plurality of first stator laminations (7) that are stacked together. The first stator laminations (7) are provided with the snap ring platform (1) and the locking member (2). The first stator laminations (7) are stacked and locked together by the snap ring platform (1) and the locking member (2) of the adjacent first stator laminations (7). The stator core (12) also includes a second stator lamination (8), which is placed between two adjacent first stator laminations (7). The second stator lamination (8) is provided with a third stator hole (81), the size of which is consistent with the outer periphery of the ring platform (101) of the snap ring platform (1), and the thickness of the snap ring platform (1) is consistent with the thickness of the second stator lamination (8).

6. The stator core according to claim 5, characterized in that, The first stator lamination (7) is provided with a first stator hole and a second stator hole. The snap ring platform (1) is connected to the edge of the first stator hole through a connecting bridge (31). The locking member (2) is provided on the edge of the second stator hole. The size of the second stator hole is consistent with the size of the inner hole (102) of the snap ring platform (1).

7. The stator core according to claim 5, characterized in that, The stator core (12) also includes a third stator lamination (9) and a fourth stator lamination (10). The third stator lamination (9) and the fourth stator lamination (10) are respectively disposed at both ends of the stator core (12). The third stator lamination (9) is provided with the snap ring platform (1), and the fourth stator lamination (10) is provided with the locking member (2).

8. The stator core according to claim 5, characterized in that, The minimum distance from the limiting horizontal block (212) to the mounting plane (22) is consistent with the thickness of the buckle ring (1).

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