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 set of rings, a second set of rings, and multiple connecting members. 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 of the rotor core. Each connecting member is inserted into a channel and has a first part and a second part located outside the two ends of the channel. The first set of rings is fitted onto each first part, and the second set of rings is fitted onto each second part. The first and second sets of rings clamp each core block from both sides of the rotor core's axial direction. According to this utility model, by using two rings and multiple connecting members to fix the core blocks into a whole to form the rotor core, the rotor manufacturing process is simplified and production efficiency is improved.

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, comprising a rotor core, a first set of rings, a second set of rings, and multiple connecting members. 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 connecting member is inserted into the channel, and each connecting member has a first portion and a second portion located outside the two ends of the channel. The first set of rings is tightly fitted onto each of the first portions, and the second set of rings is tightly fitted onto each of the second portions. The first and second sets of rings clamp each core block from both axial sides of the rotor core.

[0005] In some embodiments, a first fracture notch is formed on the first ring body, and welding is performed at the first fracture notch after the first ring body is tightly fitted onto each of the first parts.

[0006] In some embodiments, each of the first portions is provided with a first slot, and the first sleeve body is simultaneously engaged in each of the first slots.

[0007] In some embodiments, a second fracture notch is formed on the second ring body, and welding is performed at the second fracture notch after the second ring body is tightly fitted onto each of the second parts.

[0008] In some embodiments, each of the second portions is provided with a second slot, and the second sleeve body is simultaneously engaged in each of the second slots.

[0009] 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 an outer ring body. The outer ring body, the magnetic shielding ring, and the rotor core are nested sequentially from the inside out. A first retaining ring and a second retaining ring are respectively provided on both axial sides of the rotor core. The first retaining ring and the second retaining ring clamp the outer ring body, the magnetic shielding ring, and the rotor core from both axial sides of the rotor core.

[0010] In some embodiments, the first retaining ring is connected to the outer ring of the bracket by a first fastener.

[0011] In some embodiments, the second retaining ring is connected to the outer ring of the bracket by a second fastener.

[0012] In some embodiments, each of the core blocks is engaged with the magnetic shielding ring; and / or, the magnetic shielding ring is engaged with the outer ring of the support.

[0013] This utility model also provides an electric motor, including the aforementioned rotor assembly.

[0014] The rotor assembly and the motor having the same provided by this utility model have the following beneficial effects:

[0015] 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 the channel. A first set of rings is fitted onto each first part, and a second set of rings is fitted onto each second part. The first and second sets of rings are pressed against the two end faces of the rotor core, clamping the rotor core from both axial sides. This allows the two rings, in conjunction with multiple connectors, to fix the core blocks into a single unit, forming the rotor core. Compared to existing technologies, this method eliminates the need for threaded holes in the core blocks to fix them into the rotor core, simplifying the rotor manufacturing process and improving production efficiency. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the rotor assembly according to an embodiment of the present invention;

[0018] Figure 2 This is an exploded view of the rotor assembly according to an embodiment of the present invention;

[0019] Figure 3 This is an exploded view of the rotor assembly of this utility model embodiment after removing the first set of rings, the second set of rings, the first retaining ring, and the second retaining ring;

[0020] Figure 4 This is a schematic diagram of the structure of the first ring body of the rotor assembly according to an embodiment of the present invention;

[0021] Figure 5 for Figure 4 Enlarged diagram of point A in the diagram;

[0022] 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;

[0023] Figure 7 for Figure 6 Enlarged diagram of point A in the diagram;

[0024] Figure 8 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.

[0025] Figure 9 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;

[0026] Figure 10 This is a schematic diagram of the rotor support structure of the rotor assembly according to an embodiment of the present invention.

[0027] The reference numerals in the attached figures are as follows:

[0028] 1. Rotor core; 2. First ring; 3. Second ring; 4. Connector; 5. Channel; 6. First fracture notch; 7. First slot; 8. Second fracture notch; 9. Second slot; 10. Magnetic shielding ring; 11. Rotor support; 111. Outer ring of support; 112. Inner ring of support; 113. Support connecting key; 12. First retaining ring; 13. Second retaining ring; 14. First fastener; 15. Second fastener; 16. Shaft; 17. Permanent magnet; 18. First protrusion; 19. First groove; 20. Second protrusion; 21. Second groove; 22. Permanent magnet slot. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] See also Figures 1 to 10As shown, according to an embodiment of the present invention, a rotor assembly is provided, including a rotor core 1, a first set of rings 2, a second set of rings 3, and a plurality of connecting members 4. The rotor core 1 includes a plurality of core blocks, each core block being 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 connecting member 4 is inserted into each channel 5, and each connecting member 4 has a first part and a second part located outside the two ends of each channel 5. The first set of rings 2 is tightly fitted on each first part, and the second set of rings 3 is tightly fitted on each second part. The first set of rings 2 and the second set of rings 3 clamp each core block from both sides of the axial direction of the rotor core 1.

[0034] 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 outside each channel. A first set of rings 2 is tightly fitted onto each first part, and a second set of rings 3 is tightly fitted onto each second part. The first set of rings 2 and the second set of rings 3 are pressed against the two end faces of the rotor core 1, so that the first set of rings 2 and the second set of rings 3 clamp the rotor core 1 from both axial sides. In this way, the two rings, together with multiple connectors 4, can fix each core block into a whole to form the rotor core 1. Compared with the prior art, it is not necessary to drill threaded holes on each core block to fix each core block into the rotor core 1, thereby simplifying the rotor manufacturing process and improving production efficiency.

[0035] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a first fracture notch 6 is formed on the first ring body 2. After the first ring body 2 is tightly fitted onto each of the first parts, the first fracture notch 6 is welded.

[0036] In this embodiment, a first fracture notch 6 is designed on the first ring body 2, which facilitates the operator to tightly fit the first ring body 2 onto the first part of each connecting piece 4. After the first ring body 2 is tightly fitted in place, welding is performed at the first fracture notch 6, which can completely lock the first ring body 2 and each connecting piece 4. At the same time, the first ring body 2 will also press against the first end face of the rotor core 1 to fix each core block.

[0037] See also Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, each of the first parts is provided with a first slot 7, and the first ring body 2 is simultaneously engaged in each of the first slots 7.

[0038] In this technical solution, the first set of rings 2 are simultaneously engaged in each of the first slots 7, which improves the fixing effect between the first set of rings 2 and each connector 4. Therefore, the first set of rings 2 and each connector 4 work together to fix each iron core block better.

[0039] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a second fracture notch 8 is formed on the second ring body 3. After the second ring body 3 is tightly fitted onto each of the second parts, the second fracture notch 8 is welded.

[0040] In this embodiment, a second fracture notch 8 is designed on the second ring body 3, which facilitates the operator to tightly fit the second ring body 3 onto the second part of each connecting piece 4. After the second ring body 3 is tightly fitted in place, welding is performed at the second fracture notch 8, which can completely lock the second ring body 3 and each connecting piece 4. At the same time, the second ring body 3 will also press against the second end face of the rotor core 1 to fix each core block.

[0041] See also Figure 1 , Figure 2 and Figure 6 As shown, each of the second parts is constructed with a second slot 9, and the second ring body 3 is simultaneously engaged in each of the second slots 9.

[0042] In this technical solution, the second set of rings 3 are simultaneously engaged in each of the second slots 9, which improves the fixing effect between the second set of rings 3 and each connecting piece 4. Therefore, the second set of rings 3 and each connecting piece 4 work together to better fix each iron core block.

[0043] 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 an outer ring 111. The outer ring 111, the magnetic shielding ring 10, and the rotor core 1 are nested from the inside out. A first retaining ring 12 and a second retaining ring 13 are respectively provided on both axial sides of the rotor core 1. The first retaining ring 12 and the second retaining ring 13 clamp the outer ring 111, the magnetic shielding ring 10, and the rotor core 1 from both axial sides of the rotor core 1.

[0044] In this embodiment, by having the first retaining ring 12 and the second retaining ring 13 clamp the outer ring 111 of the support, the magnetic shielding ring 10, and the rotor core 1 from both axial sides of the rotor core 1, the first retaining ring 12 and the second retaining ring 13 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 an inner ring 112 and a plurality of support connecting keys 113. The first end of each support connecting key 113 is connected to the outer ring 111 of the support, and the second end of each support connecting key 113 is connected to the inner ring 112 of the support. The support connecting keys 113 are distributed in a spoke-like manner between the outer ring 111 and the inner ring 112 of the support. The inner ring 112 of the support is fitted onto the rotating shaft 16.

[0045] See also Figures 1 to 3 As shown, the first retaining ring 12 is connected to the outer ring 111 of the bracket via the first fastener 14.

[0046] In this technical solution, the first retaining ring 12 and the outer ring 111 of the support are fixed together by the first fastener 14, thereby achieving axial stopping of the magnetic shielding ring 10 and the rotor support 11 by the first retaining ring 12. Specifically, the first retaining ring 12 has a first threaded hole, and the outer ring 111 of the support has a second threaded hole. The first fastener 14 is threaded into the first threaded hole and the second threaded hole to fix the first retaining ring 12 and the outer ring 111 of the support together. To improve the fixing effect between the first retaining ring 12 and the outer ring 111 of the support, preferably, there are multiple first threaded holes, which are distributed circumferentially around the first retaining ring 12; there are multiple second threaded holes, which are distributed circumferentially around the outer ring 111 of the support; and there are multiple first fasteners 14, which are threaded into each first threaded hole and each second threaded hole respectively.

[0047] See also Figures 1 to 3 As shown, the second retaining ring 13 is connected to the outer ring 111 of the bracket via the second fastener 15.

[0048] In this embodiment, the second retaining ring 13 and the outer ring 111 of the support are fixed together by the second fastener 15, thereby achieving axial stopping of the magnetic shielding ring 10 and the rotor support 11 by the second retaining ring 13. Specifically, the second retaining ring 13 is provided with a third threaded hole, and the outer ring 111 of the support is provided with a fourth threaded hole. The second fastener 15 is threaded into the third threaded hole and the fourth threaded hole to fix the second retaining ring 13 and the outer ring 111 of the support together. To improve the fixing effect between the second retaining ring 13 and the outer ring 111 of the support, preferably, there are multiple third threaded holes, which are distributed circumferentially around the second retaining ring 13; there are multiple fourth threaded holes, which are distributed circumferentially around the outer ring 111 of the support; and there are multiple second fasteners 15, each of which is threaded into each third threaded hole and each fourth threaded hole.

[0049] See also Figure 2 , Figure 3 , Figure 8 and Figure 9 As shown, each iron core block is engaged with the magnetic shielding ring 10.

[0050] 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 18 on the side facing the magnetic shielding ring 10, and multiple first grooves 19 may be formed on the outer peripheral wall of the magnetic shielding ring 10. The first grooves 19 are distributed circumferentially along the magnetic shielding ring 10, and each first protrusion 18 is engaged in the first groove 19 to achieve engagement between each iron core block and the magnetic shielding ring 10. It should be noted that permanent magnet slots 22 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 22 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 17 is inserted into each permanent magnet slot.

[0051] See also Figure 2 , Figure 3 , Figure 9 and Figure 10 As shown, the magnetic shielding ring 10 is engaged with the outer ring 111 of the bracket.

[0052] In this embodiment, the magnetic shielding ring 10 and the outer ring 111 of the support are engaged to form a circumferential fixation between the magnetic shielding ring 10 and the rotor support 11. Specifically, a plurality of second protrusions 20 may be formed on the outer peripheral wall of the outer ring 111 of the support, and the second protrusions 20 may be distributed at intervals along the circumference of the outer ring 111 of the support; a plurality of second grooves 21 may be formed on the inner peripheral wall of the magnetic shielding ring 10, and the second grooves 21 may be distributed at intervals along the circumference of the magnetic shielding ring 10. The second protrusions 20 are engaged in the second grooves 21 to achieve the engagement between the magnetic shielding ring 10 and the outer ring 111 of the support.

[0053] This utility model also provides an electric motor, including the aforementioned rotor assembly.

[0054] 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.

[0055] 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 ring body (2), a second ring body (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 outside the two ends of each channel (5). The first ring body (2) is tightly fitted on each first part, and the second ring body (3) is tightly fitted on each second part. The first ring body (2) and the second ring body (3) clamp each core block from both sides of the axial direction of the rotor core (1).

2. The rotor assembly of claim 1, wherein A first fracture notch (6) is formed on the first ring body (2). After the first ring body (2) is tightly fitted onto each of the first parts, welding is performed at the first fracture notch (6).

3. The rotor assembly of claim 1 or 2, wherein, Each of the first parts is provided with a first slot (7), and the first ring body (2) is simultaneously engaged in each of the first slots (7).

4. The rotor assembly of claim 1, wherein A second fracture notch (8) is formed on the second ring body (3). After the second ring body (3) is tightly fitted onto each of the second parts, welding is performed at the second fracture notch (8).

5. The rotor assembly of claim 1 or 4, wherein, Each of the second parts is provided with a second slot (9), and the second ring body (3) is simultaneously engaged in each of the second slots (9).

6. The rotor assembly of claim 1, wherein The rotor core (1) is assembled with a magnetic shielding ring (10) and a rotor support (11) on its radial inner side. The rotor support (11) includes an outer ring (111). The outer ring (111), the magnetic shielding ring (10), and the rotor core (1) are nested from the inside out. A first retaining ring (12) and a second retaining ring (13) are respectively provided on both axial sides of the rotor core (1). The first retaining ring (12) and the second retaining ring (13) clamp the outer ring (111), the magnetic shielding ring (10), and the rotor core (1) from both axial sides of the rotor core (1).

7. The rotor assembly according to claim 6, characterized in that, The first retaining ring (12) is connected to the outer ring (111) of the bracket by the first fastener (14).

8. The rotor assembly of claim 6, wherein, The second retaining ring (13) is connected to the outer ring (111) of the bracket by a second fastener (15).

9. The rotor assembly of claim 6, wherein, Each of the iron core blocks is engaged with the magnetic shielding ring (10); and / or, the magnetic shielding ring (10) is engaged with the outer ring (111) of the bracket.

10. An electric machine characterized by Includes the rotor assembly as described in any one of claims 1 to 9.

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