Rotor assembly and motor having it

Abstract

This utility model provides a rotor assembly and a motor having the same. The rotor assembly includes a rotor core, a first end bracket, a second end bracket, and multiple connectors. The rotor core includes multiple core blocks, which are circumferentially joined to form the rotor core. Each core block has a channel that extends through it along the axial direction. Each connector is inserted into a channel and has a first part and a second part located outside the two ends of the channel. Each first part is connected to a first outer ring of the first end bracket, and each second part is connected to a second outer ring of the second end bracket. The first and second outer rings clamp the core blocks from both sides of the rotor core along its axial direction. According to this utility model, the core blocks are fixed into a single unit to form the rotor core by two outer rings and multiple connectors, thereby simplifying the rotor manufacturing process and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a rotor assembly and a motor having the same. Background Technology

[0002] Currently, the rotor structure of a typical tangential permanent magnet direct drive motor mainly includes a rotor support, a magnetic shielding ring, and a rotor core. The rotor core of this structure is usually formed by splicing multiple core blocks circumferentially. To fix these core blocks, threaded holes are typically drilled at corresponding positions on each core block, magnetic shielding ring, and rotor support. Multiple bolts are then used to connect the three parts together, thereby securing the core blocks and stabilizing the rotor structure. However, this process is relatively complex and has low production efficiency. Utility Model Content

[0003] Therefore, this utility model provides a rotor assembly that can solve the technical problems of complex manufacturing processes and low production efficiency of existing permanent magnet direct drive motor rotor structures.

[0004] To address the aforementioned problems, this utility model provides a rotor assembly, including a rotor core, a first end bracket, a second end bracket, and multiple connectors. The rotor core comprises multiple core blocks, which are circumferentially joined to form the rotor core. Each core block has a channel constructed within it, and each channel extends through the core block along the axial direction of the rotor core. Each connector is inserted into the channel, and each connector has a first portion and a second portion located outside the two ends of the channel. The first end bracket includes a first outer ring, and the second end bracket includes a second outer ring. Each first portion is connected to the first outer ring, and each second portion is connected to the second outer ring. The first and second outer rings clamp each core block from both axial sides of the rotor core.

[0005] In some embodiments, each of the first portions is connected to the first outer ring body by a first fastener.

[0006] In some embodiments, a plurality of first positioning notches are formed on the first outer ring body, and each of the first positioning notches is distributed at intervals along the circumference of the first outer ring body, with each of the first portions located within each of the first positioning notches.

[0007] In some embodiments, the first end bracket further includes a first inner ring and a first connecting key, the first inner ring being located within the first outer ring, a first end of the first connecting key being connected to the first outer ring, a second end of the first connecting key being connected to the first inner ring, and the first inner ring being fitted onto the rotating shaft.

[0008] In some embodiments, each of the second portions is connected to the second outer ring body via a second fastener.

[0009] In some embodiments, a plurality of second positioning notches are formed on the second outer ring body, and each second positioning notch is distributed at intervals along the circumference of the second outer ring body, with each second portion located within each second positioning notch.

[0010] In some embodiments, the second end bracket further includes a second inner ring and a second connecting key. The second inner ring is located inside the second outer ring. The first end of the second connecting key is connected to the second outer ring, and the second end of the second connecting key is connected to the second inner ring. The second inner ring is fitted onto the rotating shaft.

[0011] In some embodiments, a magnetic shielding ring and a rotor support are assembled on the radially inner side of the rotor core. The rotor support includes a third outer ring. The third outer ring, the magnetic shielding ring, and the rotor core are nested sequentially from the inside out. The first outer ring and the second outer ring respectively clamp the third outer ring and the magnetic shielding ring from both axial sides of the rotor core.

[0012] In some embodiments, each of the iron core blocks is engaged with the magnetic shielding ring.

[0013] In some embodiments, the magnetic shielding ring is engaged with the third outer ring.

[0014] In some embodiments, the first end bracket has a first stop extending into the interior of the third outer ring body, the first stop transitioning into the inner peripheral wall of the third outer ring body; and / or, the second end bracket has a second stop extending into the interior of the third outer ring body, the second stop transitioning into the inner peripheral wall of the third outer ring body.

[0015] This utility model also provides an electric motor, including the aforementioned rotor assembly.

[0016] The rotor assembly and the motor having the same provided by this utility model have the following beneficial effects:

[0017] By constructing channels extending axially along the rotor core within each core block, and inserting connectors into each channel, each connector has a first part and a second part located outside both ends of the channel. Each first part connects to a first outer ring body, and each second part connects to a second outer ring body. This causes the first and second outer ring bodies to press against the two end faces of the rotor core, allowing the two outer ring bodies, in conjunction with multiple connectors, to fix the core blocks into a single unit to form the rotor core. Compared to existing technologies, this method eliminates the need for threaded holes in each core block to fix it into the rotor core, thus simplifying the rotor manufacturing process and improving production efficiency. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model 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.

[0019] Figure 1 This is a schematic diagram of the rotor assembly according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of the rotor assembly according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the rotor assembly of this utility model after removing the first end bracket and the second end bracket;

[0022] Figure 4 An exploded view of the rotor assembly of this utility model embodiment after the first end support and the second end support have been removed;

[0023] Figure 5 This is a schematic diagram of the structure of the first end support of the rotor assembly according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the connecting member of the rotor assembly according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the core block of the rotor core of the rotor assembly according to an embodiment of the present utility model.

[0026] Figure 8 This is a schematic diagram of the structure of the magnetic shielding ring of the rotor assembly according to an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the rotor support structure of the rotor assembly according to an embodiment of the present invention.

[0028] The reference numerals in the attached figures are as follows:

[0029] 1. Rotor core; 2. First end support; 21. First outer ring; 22. First inner ring; 23. First connecting key; 3. Second end support; 31. Second outer ring; 32. Second inner ring; 33. Second connecting key; 4. Connector; 5. Channel; 6. First fastener; 7. First positioning notch; 8. Second fastener; 9. Second positioning notch; 10. Magnetic shielding ring; 11. Rotor support; 111. Third outer ring; 112. Third inner ring; 113. Third connecting key; 12. Shaft; 13. Permanent magnet; 14. First protrusion; 15. First groove; 16. Second protrusion; 17. Second groove; 18. Permanent magnet slot. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0032] 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.

[0033] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0034] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, a rotor assembly is provided, including a rotor core 1, a first end bracket 2, a second end bracket 3, and a plurality of connectors 4. The rotor core 1 includes a plurality of core blocks, which are spliced ​​together circumferentially to form the rotor core 1. Each core block has a channel 5 constructed therein, and each channel 5 passes through each core block along the axial direction of the rotor core 1. Each connector 4 is inserted into each channel 5, and each connector 4 has a first part and a second part located outside the two ends of each channel 5. The first end bracket 2 includes a first outer ring 21, and the second end bracket 3 includes a second outer ring 31. Each first part is connected to the first outer ring 21, and each second part is connected to the second outer ring 31. The first outer ring 21 and the second outer ring 31 clamp each core block from both sides of the axial direction of the rotor core 1.

[0035] In this technical solution, channels 5 extending axially along the rotor core 1 are constructed within each core block. Connectors 4 are inserted into each channel 5, and each connector 4 has a first part and a second part located outside both ends of each channel 5. Each first part is connected to a first outer ring body 21, and each second part is connected to a second outer ring body 31. This causes the first outer ring body 21 and the second outer ring body 31 to press against the two end faces of the rotor core 1. Thus, the two outer ring bodies, together with multiple connectors 4, can fix each core block into a single unit to form the rotor core 1. Compared to existing technologies, this method eliminates the need for threaded holes in each core block to fix it into the rotor core 1, thereby simplifying the rotor manufacturing process and improving production efficiency.

[0036] See also Figure 1 and Figure 2 As shown, each of the first parts is connected to the first outer ring body 21 by a first fastener 6.

[0037] In this embodiment, the connection between the first part of the connector 4 and the first outer ring body 21 is facilitated by the first fastener 6. Specifically, each first part is provided with a first threaded hole, and the outer peripheral wall of the first outer ring body 21 is provided with a plurality of second threaded holes, which are distributed at intervals along the circumference of the first outer ring body 21. Each first fastener 6 is simultaneously threaded into each first threaded hole and each second threaded hole. It should be noted that each first part can also be connected to the first outer ring body 21 by welding.

[0038] See also Figure 1 , Figure 2 and Figure 5 As shown, a plurality of first positioning notches 7 are formed on the first outer ring body 21. Each first positioning notch 7 is distributed at intervals along the circumference of the first outer ring body 21, and each first part is located within each first positioning notch 7.

[0039] In this technical solution, by designing multiple first positioning notches 7 on the first outer ring 21, the alignment and installation of each connector 4 and the first outer ring 21 are made faster and more convenient, thereby improving assembly efficiency. Each second threaded hole is constructed on the bottom wall of each first positioning notch 7.

[0040] See also Figure 1 and Figure 2As shown, the first end bracket 2 further includes a first inner ring 22 and a first connecting key 23. The first inner ring 22 is located within the first outer ring 21. The first end of the first connecting key 23 is connected to the first outer ring 21, and the second end of the first connecting key 23 is connected to the first inner ring 22. The first inner ring 22 is fitted onto the rotating shaft 12. This creates an assembly connection between the first end bracket 2 and the rotating shaft 12, thereby enhancing the overall structural strength of the rotor assembly. Preferably, there are multiple first connecting keys 23. The first end of each first connecting key 23 is connected to the first outer ring 21, and the second end of each first connecting key 23 is connected to the first inner ring 22. The first connecting keys 23 are distributed in a spoke-like pattern between the first outer ring 21 and the first inner ring 22.

[0041] See also Figure 1 and Figure 2 As shown, each of the second parts is connected to the second outer ring body 31 by a second fastener 8.

[0042] In this embodiment, the second fastener 8 facilitates the connection between the second part of the connector 4 and the second outer ring 31. Specifically, each second part is provided with a third threaded hole, and the outer peripheral wall of the second outer ring 31 is provided with a plurality of fourth threaded holes, which are spaced apart circumferentially along the second outer ring 31. Each second fastener is simultaneously threaded into each third threaded hole and each fourth threaded hole. It should be noted that each second part can also be connected to the second outer ring 31 by welding.

[0043] See also Figure 1 and Figure 2 As shown, a plurality of second positioning notches 9 are formed on the second outer ring body 31. Each second positioning notch 9 is distributed at intervals along the circumference of the second outer ring body 31, and each second part is located within each second positioning notch 9.

[0044] In this technical solution, by designing multiple second positioning notches 9 on the second outer ring 31, the alignment and installation of each connector 4 and the second outer ring 31 are made faster and more convenient, thereby improving assembly efficiency. Each fourth threaded hole is constructed on the bottom wall of each second positioning notch 9.

[0045] See also Figure 1 and Figure 2As shown, the second end bracket 3 also includes a second inner ring 32 and a second connecting key 33. The second inner ring 32 is located within the second outer ring 31. The first end of the second connecting key 33 is connected to the second outer ring 31, and the second end of the second connecting key 33 is connected to the second inner ring 32. The second inner ring 32 is fitted onto the rotating shaft 12. This creates an assembly connection between the second end bracket 3 and the rotating shaft 12, thereby further enhancing the overall structural strength of the rotor assembly. Preferably, there are multiple second connecting keys 33. The first end of each second connecting key 33 is connected to the second outer ring 31, and the second end of each first connecting key 23 is connected to the second inner ring 32. The second connecting keys 33 are distributed in a spoke-like pattern between the second outer ring 31 and the second inner ring 32.

[0046] See also Figures 1 to 3 As shown, a magnetic shielding ring 10 and a rotor support 11 are assembled on the radial inner side of the rotor core 1. The rotor support 11 includes a third outer ring 111. The third outer ring 111, the magnetic shielding ring 10, and the rotor core 1 are nested from the inside out. The first outer ring 21 and the second outer ring 31 respectively clamp the third outer ring 111 and the magnetic shielding ring 10 from the axial sides of the rotor core 1.

[0047] In this embodiment, by having the first outer ring 21 and the second outer ring 31 clamp the third outer ring 111 and the magnetic shielding ring 10 from both axial sides of the rotor core 1, the first outer ring 21 and the second outer ring 31 can also axially fix the magnetic shielding ring 10 and the rotor support 11. It should be noted that the rotor support 11 also includes a third inner ring 112 and a plurality of third connecting keys 113. The first end of each third connecting key 113 is connected to the third outer ring 111, and the second end of each third connecting key 113 is connected to the third inner ring 112. The third connecting keys 113 are distributed in a spoke-like manner between the third outer ring 111 and the third inner ring 112. The third inner ring 112 is fitted onto the rotating shaft 12.

[0048] See also Figure 4 , Figure 7 and Figure 8 As shown, each iron core block is engaged with the magnetic shielding ring 10.

[0049] In this technical solution, each iron core block is engaged with the magnetic shielding ring 10, thus forming a circumferential fixation between the iron core block and the magnetic shielding ring 10. Specifically, each iron core block may have a first protrusion 14 on the side facing the magnetic shielding ring 10, and multiple first grooves 15 may be formed on the outer peripheral wall of the magnetic shielding ring 10. The first grooves 15 are distributed circumferentially along the magnetic shielding ring 10, and each first protrusion 14 engages with each first groove 15 to achieve engagement between each iron core block and the magnetic shielding ring 10. It should be noted that permanent magnet slots 18 are constructed on both sides where the iron core blocks are spliced. After the iron core blocks are spliced ​​to form the rotor iron core 1, the two permanent magnet slots 18 between two adjacent iron core blocks form a complete permanent magnet slot. Each permanent magnet slot extends radially along the rotor iron core 1, and a permanent magnet 13 is inserted into each permanent magnet slot.

[0050] See also Figure 4 , Figure 8 and Figure 9 As shown, the magnetic shielding ring 10 and the third outer ring 111 are engaged.

[0051] In this embodiment, the magnetic shielding ring 10 and the third outer ring 111 are engaged to form a circumferential fixation between the magnetic shielding ring 10 and the rotor support 11. Specifically, a plurality of second protrusions 16 may be formed on the outer peripheral wall of the third outer ring 111, and the second protrusions 16 may be distributed at intervals along the circumference of the third outer ring 111; a plurality of second grooves 17 may be formed on the inner peripheral wall of the magnetic shielding ring 10, and the second grooves 17 may be distributed at intervals along the circumference of the magnetic shielding ring 10. The second protrusions 16 are engaged in the second grooves 17 to achieve the engagement between the magnetic shielding ring 10 and the third outer ring 111.

[0052] See Figure 2 As shown, the first end bracket 2 has a first stop extending into the interior of the third outer ring 111, and the first stop is in transition fit with the inner peripheral wall of the third outer ring 111; and / or, the second end bracket 3 has a second stop extending into the interior of the third outer ring 111, and the second stop is in transition fit with the inner peripheral wall of the third outer ring 111.

[0053] In this technical solution, the transition fit between the first stop and the inner circumferential wall of the third outer ring 111 enables the first end bracket 2 to form a radial positioning of the rotor bracket 11; the transition fit between the second stop and the inner circumferential wall of the third outer ring 111 enables the second end bracket 3 to also form a radial positioning of the rotor bracket 11.

[0054] This utility model also provides an electric motor, including the aforementioned rotor assembly.

[0055] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0056] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A rotor assembly characterized by, The rotor core (1) includes a rotor core (1), a first end bracket (2), a second end bracket (3), and multiple connectors (4). The rotor core (1) includes multiple core blocks, which are spliced ​​together circumferentially to form the rotor core (1). Each core block has a channel (5) constructed inside it. Each channel (5) passes through each core block along the axial direction of the rotor core (1). Each connector (4) is inserted into each channel (5), and each connector (4) has a first part and a second part located outside the two ends of each channel (5). The first end bracket (2) includes a first outer ring (21), and the second end bracket (3) includes a second outer ring (31). Each first part is connected to the first outer ring (21), and each second part is connected to the second outer ring (31). The first outer ring (21) and the second outer ring (31) clamp each core block from both sides of the axial direction of the rotor core (1).

2. The rotor assembly of claim 1, wherein Each of the first parts is connected to the first outer ring body (21) by a first fastener (6).

3. The rotor assembly of claim 1 or 2, wherein, A plurality of first positioning notches (7) are formed on the first outer ring body (21), and each of the first positioning notches (7) is distributed at intervals along the circumference of the first outer ring body (21), and each of the first parts is located in each of the first positioning notches (7).

4. The rotor assembly of claim 1, wherein The first end bracket (2) further includes a first inner ring (22) and a first connecting key (23). The first inner ring (22) is located inside the first outer ring (21). The first end of the first connecting key (23) is connected to the first outer ring (21), and the second end of the first connecting key (23) is connected to the first inner ring (22). The first inner ring (22) is fitted onto the rotating shaft (12).

5. The rotor assembly of claim 1, wherein Each of the second parts is connected to the second outer ring body (31) by a second fastener (8).

6. The rotor assembly of claim 1 or 5, wherein, Multiple second positioning notches (9) are formed on the second outer ring body (31). Each second positioning notch (9) is distributed at intervals along the circumference of the second outer ring body (31), and each second part is located in each second positioning notch (9).

7. The rotor assembly according to claim 1, characterized in that, The second end bracket (3) also includes a second inner ring (32) and a second connecting key (33). The second inner ring (32) is located inside the second outer ring (31). The first end of the second connecting key (33) is connected to the second outer ring (31), and the second end of the second connecting key (33) is connected to the second inner ring (32). The second inner ring (32) is fitted onto the rotating shaft (12).

8. The rotor assembly of claim 1, wherein, A magnetic isolation ring body (10) and a rotor bracket (11) are assembled on the radial inner side of the rotor core (1). The rotor bracket (11) includes a third outer ring body (111). The third outer ring body (111), the magnetic isolation ring body (10), and the rotor core (1) are nested in sequence from the inside out. The first outer ring body (21) and the second outer ring body (31) clamp the third outer ring body (111) and the magnetic isolation ring body (10) from the axial two sides of the rotor core (1) respectively.

9. The rotor assembly of claim 8, wherein, Each of the iron core blocks is in snap-fit with the magnetic isolation ring body (10).

10. The rotor assembly of claim 8, wherein, The magnetic isolation ring body (10) is in snap-fit with the third outer ring body (111).

11. The rotor assembly of claim 8, wherein, The first end bracket (t) has a first stop groove extending into the interior of the third outer ring body (111), and the first stop groove is in transitional fit with the inner peripheral wall of the third outer ring body (111); and / or, the second end bracket (3) has a second stop groove extending into the interior of the third outer ring body (111), and the second stop groove is in transitional fit with the inner peripheral wall of the third outer ring body (111).

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

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