Surface-mounted rotor and motor

Abstract

The utility model relates to a surface-mounted rotor and a motor. The surface-mounted rotor comprises a magnet vane structure, an iron core and a plurality of magnetic blocks. The magnet vane structure comprises an annular plate, a first annular boss, a second annular boss and a plurality of positioning parts, the first annular boss is arranged on the inner edge of the annular plate, the second annular boss is arranged on the outer edge of the annular plate, and the protruding direction of the second annular boss relative to the annular plate and the protruding direction of the first annular boss relative to the annular plate are both parallel to the axial direction of the annular plate; the iron core sleeves the first annular boss and is matched with the outer diameter of the first annular boss; the positioning parts are located between the first annular boss and the second annular boss, the positioning parts are evenly arranged at intervals in the circumferential direction of the annular plate, an interval space is formed between any two adjacent positioning parts, the magnetic blocks are arranged in the interval spaces in a one-to-one correspondence mode, and the magnetic blocks are attached and fixed to the outer circumferential face of the iron core. According to the surface-mounted rotor, jigs needed in the production process of the surface-mounted rotor are reduced, and the production process is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of rotor assembly, and particularly to a surface-mounted rotor and a motor. Background Art

[0002] The surface-mounted rotor has the advantages of simple structure, low cost, less magnetic leakage, good sinusoidality of back electromotive force waveform, small moment of inertia, and convenient installation of magnetic blocks.

[0003] The surface-mounted rotor generally includes an iron core, magnetic blocks, a protective sleeve, etc. When assembling the surface-mounted rotor, multiple magnetic blocks are attached to the outer peripheral surface of the iron core, and then the protective sleeve is sleeved outside the magnetic blocks. If the multiple magnetic blocks are unevenly distributed, it is easy to cause uneven distribution of surface magnetism, air gap, and magnetic density of the surface-mounted rotor, thereby affecting the performance of the motor. Therefore, it is necessary to ensure that the multiple magnetic blocks are evenly distributed along the outer periphery of the iron core as much as possible.

[0004] In the prior art, when assembling the surface-mounted rotor, in order to achieve uniform distribution of multiple magnetic blocks along the outer periphery of the iron core, a special positioning jig is designed to position the multiple magnetic blocks and the iron core, resulting in a large number of jigs required in the production process of the surface-mounted rotor. Summary of the Utility Model

[0005] Based on this, in view of the technical problem that in the prior art, when assembling the surface-mounted rotor, in order to achieve uniform distribution of multiple magnetic blocks along the outer periphery of the iron core, a special positioning jig is designed to position the multiple magnetic blocks and the iron core, resulting in a large number of jigs required in the production process of the surface-mounted rotor, there is a need to provide a surface-mounted rotor and a motor.

[0006] A surface-mounted rotor includes: a magnetic isolation plate structure, an iron core, and multiple magnetic blocks; the magnetic isolation plate structure includes: an annular plate, a first annular boss, a second annular boss, and multiple positioning parts;

[0007] The first annular boss is disposed on the inner edge of the annular plate, the second annular boss is disposed on the outer edge of the annular plate, the protruding directions of the second annular boss relative to the annular plate and the first annular boss relative to the annular plate are both parallel to the axial direction of the annular plate; the iron core is sleeved and fixed on the first annular boss and is adapted to the outer diameter of the first annular boss;

[0008] The multiple positioning parts are located between the first annular boss and the second annular boss, the multiple positioning parts are evenly spaced along the circumferential direction of the annular plate, an interval space is formed between any two adjacent positioning parts, and the multiple magnetic blocks are correspondingly disposed in the multiple interval spaces, and the magnetic blocks are fixedly attached to the outer peripheral surface of the iron core.

[0009] In one embodiment, the inner hole of the iron core is a stepped hole, which includes a first hole and a second hole. The inner diameter of the first hole is larger than that of the second hole, and a stepped surface is formed at the connection between the hole wall of the first hole and the hole wall of the second hole;

[0010] The inner diameter of the first hole is adapted to the outer diameter of the first annular boss, and the stepped surface abuts against one end of the first annular boss facing away from the annular plate; the hole wall of the second hole is coplanar with the inner peripheral surface of the first annular boss.

[0011] In one embodiment, one end of each of the positioning portions facing away from the central axis of the annular plate is fixedly connected to the inner peripheral surface of the second annular boss respectively.

[0012] In one embodiment, one end of each of the magnetic blocks along the circumferential direction of the annular plate is respectively adhered and fixed to the adjacent positioning portion, and there is a gap between the other end of each of the magnetic blocks along the circumferential direction of the annular plate and the adjacent positioning portion.

[0013] In one embodiment, the annular plate, the first annular boss, the second annular boss and the plurality of positioning portions are of an integral structure.

[0014] In one embodiment, the iron core is adhesively fixed to the magnetic isolation plate structure.

[0015] In one embodiment, the number of the magnetic isolation plate structures is two, and the two magnetic isolation plate structures are respectively located at both axial ends of the iron core.

[0016] In one embodiment, the protruding length of the second annular boss relative to the annular plate is less than the protruding length of the first annular boss relative to the annular plate.

[0017] In one embodiment, the surface-mounted rotor further includes a protective sleeve, and the protective sleeve is sleeved outside the plurality of magnetic blocks; the outer peripheral surface of the protective sleeve is coplanar with the outer peripheral surface of the second annular boss.

[0018] A motor includes the surface-mounted rotor according to any one of the above embodiments.

[0019] For the above-mentioned surface-mounted rotor and motor, the first annular boss is arranged at the inner edge of the annular plate, and the protruding directions of the first annular boss relative to the annular plate are all parallel to the axial direction of the annular plate. The iron core can be sleeved on the first annular boss, so that one axial end of the iron core faces the annular plate. Since the plurality of positioning portions are located between the first annular boss and the second annular boss, and the plurality of magnetic blocks are respectively arranged in the plurality of spaced spaces, one end of the magnetic block faces the annular plate. In this way, the magnetic leakage prevention structure formed by the annular plate, the first annular boss at the inner edge, and the second annular boss at the outer edge can wrap one end of the magnetic block and the iron core, playing a role in preventing magnetic leakage at the end of the surface-mounted rotor. When assembling the surface-mounted rotor, since the outer diameter of the iron core matches that of the first annular boss, the first annular boss can position the iron core. Since the plurality of positioning portions are evenly spaced along the circumferential direction of the annular plate, a plurality of spaced spaces arranged at uniform intervals are formed, and further, the plurality of magnetic blocks located in each spaced space are evenly spaced along the circumferential direction of the iron core. It can be seen that for the above-mentioned surface-mounted rotor, a positioning structure is designed on the magnetic isolation plate structure for magnetic leakage prevention to respectively position the iron core and the plurality of magnetic blocks, so that reliable positioning of the iron core and the plurality of magnetic blocks can be respectively achieved by using the magnetic leakage prevention structure (i.e., the magnetic isolation plate structure) required by the surface-mounted rotor itself, enabling the plurality of magnetic blocks to be evenly distributed on the outer peripheral surface of the iron core, thus eliminating the positioning fixtures specifically designed for the iron core and the plurality of magnetic blocks, reducing the fixtures required in the production process of the surface-mounted rotor, and further simplifying the production process. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a surface-mounted rotor according to an embodiment.

[0021] Figure 2 For Figure 1 It is a schematic longitudinal sectional view of the shown surface-mounted rotor.

[0022] Figure 3 For Figure 1 It is a schematic diagram of the magnetic isolation plate structure of the shown surface-mounted rotor.

[0023] Figure 4 For Figure 1 It is a schematic structural diagram of the iron core of the shown surface-mounted rotor.

[0024] Reference Numerals:

[0025] 100, magnetic isolation plate structure; 110, annular plate; 120, first annular boss; 130, second annular boss; 140, positioning portion; 141, spaced space;

[0026] 200, iron core; 201, first hole; 202, second hole; 203, stepped surface;

[0027] 300, magnetic block;

[0028] 400, protective sleeve. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0035] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a surface-mounted rotor. In combination with Figure 3 and Figure 4 , the surface-mounted rotor includes: a magnetic isolation plate structure 100, an iron core 200 and a plurality of magnetic blocks 300. The magnetic isolation plate structure 100 includes: an annular plate 110, a first annular boss 120, a second annular boss 130 and a plurality of positioning portions 140.

[0036] The first annular boss 120 is disposed on the inner edge of the annular plate 110. The second annular boss 130 is disposed on the outer edge of the annular plate 110, and the protruding directions of the second annular boss 130 relative to the annular plate 110 and the first annular boss 120 relative to the annular plate 110 are both parallel to the axial direction of the annular plate 110. The iron core 200 is sleeved and fixed on the first annular boss 120 and is adapted to the outer diameter of the first annular boss 120.

[0037] A plurality of positioning portions 140 are located between the first annular boss 120 and the second annular boss 130, and the plurality of positioning portions 140 are evenly spaced along the circumferential direction of the annular plate 110. An interval space 141 is formed between any two adjacent positioning portions 140, and a plurality of magnetic blocks 300 are correspondingly disposed in the plurality of interval spaces 141. The magnetic blocks 300 are fixedly attached to the outer peripheral surface of the iron core 200.

[0038] For the above-mentioned surface-mounted rotor, the first annular boss 120 is disposed at the inner edge of the annular plate 110, and the protruding directions of the first annular boss 120 relative to the annular plate 110 are all parallel to the axial direction of the annular plate 110. The iron core 200 can be sleeved on the first annular boss 120, so that one axial end of the iron core 200 faces the annular plate 110. Since a plurality of positioning portions 140 are located between the first annular boss 120 and the second annular boss 130, a plurality of magnetic blocks 300 are correspondingly disposed in a plurality of spaced spaces 141, so that one end of the magnetic block 300 faces the annular plate 110. In this way, the magnetic leakage prevention structure 100 formed by the annular plate 110, the first annular boss 120 at the inner edge, and the second annular boss 130 at the outer edge can wrap one end of the magnetic block 300 and the iron core 200, playing a role in preventing magnetic leakage at the end of the surface-mounted rotor. When assembling the surface-mounted rotor, since the outer diameter of the iron core 200 is adapted to that of the first annular boss 120, the first annular boss 120 can position the iron core 200. Since a plurality of positioning portions 140 are uniformly arranged at intervals along the circumferential direction of the annular plate 110, a plurality of spaced spaces 141 arranged at uniform intervals are formed, and further, a plurality of magnetic blocks 300 located in the respective spaced spaces 141 are uniformly arranged at intervals along the circumferential direction of the iron core 200. It can be seen that for the above-mentioned surface-mounted rotor, a positioning structure is designed on the magnetic isolation plate structure 100 for magnetic leakage prevention to position the iron core 200 and a plurality of magnetic blocks 300 respectively. Thus, the magnetic leakage prevention structure (i.e., the magnetic isolation plate structure 100) required by the surface-mounted rotor itself can be used to respectively and reliably position the iron core 200 and a plurality of magnetic blocks 300, so that a plurality of magnetic blocks 300 are uniformly distributed on the outer peripheral surface of the iron core 200, thereby eliminating the positioning jigs specially designed for the iron core and a plurality of magnetic blocks, reducing the jigs required in the production process of the surface-mounted rotor, and further simplifying the production process.

[0039] In actual operation, when the iron core 200 is sleeved on the first annular boss 120, abutting one axial end of the iron core 200 against the annular plate 110 can position the iron core 200 axially. When placing the magnet 300 into the corresponding spaced space 141, abutting one end of the magnet 300 against the annular plate 110 can axially position the magnet 300. At the same time, this also makes the structure of the surface-mounted rotor compact.

[0040] In one embodiment, the iron core 200 and the magnetic isolation plate structure 100 can be fixedly bonded by an adhesive. Specifically, the first annular boss 120 and the annular plate 110 can be respectively bonded and fixed to the iron core 200.

[0041] In other embodiments, the iron core 200 can also be embedded in the magnetic isolation plate structure 100 by a die-casting process.

[0042] In one embodiment, the annular plate 110, the first annular boss 120, the second annular boss 130, and the plurality of positioning portions 140 are of an integral structure.

[0043] In one embodiment, the magnetic block 300 and the iron core 200 are adhesively fixed. In actual operation, adhesive can be first applied on the outer peripheral surface of the iron core 200, the magnetic block 300 is placed in the respective corresponding spaced space 141, and the magnetic block 300 is pressed against the outer peripheral surface of the iron core 200, so that the outer peripheral surfaces of the magnetic block 300 and the iron core 200 are adhesively bonded through the adhesive.

[0044] In one embodiment, one ends of the respective magnetic blocks 300 along the same circumferential end of the annular plate 110 are respectively fitted and fixed to the adjacent positioning portions 140, and there are gaps between the other ends of the respective magnetic blocks 300 along the circumferential direction of the annular plate 110 and the adjacent positioning portions 140. Since the plurality of positioning portions 140 are evenly spaced, when one ends of the respective magnetic blocks 300 along the same circumferential end of the annular plate 110 are respectively fitted and fixed to the adjacent positioning portions 140, the uniformity of the circumferential arrangement of the plurality of magnetic blocks 300 can be further ensured.

[0045] Specifically, along the circumferential direction of the annular plate 110, the width of the spaced space 141 is greater than the width of the corresponding magnetic block 300. When assembling the surface-mounted rotor, after the plurality of magnetic blocks 300 are respectively placed in the respective corresponding spaced spaces 141, before the adhesive on the outer peripheral surface of the iron core 200 is cured, the plurality of magnetic blocks 300 can be quickly pushed in the same circumferential direction (such as the clockwise or counterclockwise direction), so that the respective magnetic blocks 300 are respectively abutted against their adjacent positioning portions 140 in the same circumferential direction. After the adhesive on the outer peripheral surface of the iron core 200 is cured, one ends of the respective magnetic blocks 300 along the circumferential direction of the annular plate 110 are respectively fitted and fixed to the adjacent positioning portions 140, and there are gaps between the other ends of the respective magnetic blocks 300 along the circumferential direction of the annular plate 110 and the adjacent positioning portions 140.

[0046] In one embodiment, one ends of the respective positioning portions 140 facing away from the central axis of the annular plate 110 are respectively fixedly connected to the inner peripheral surface of the second annular boss 130, which is convenient for the arrangement of the positioning portions 140.

[0047] In one embodiment, one ends of the respective positioning portions 140 facing the central axis of the annular plate 110 are respectively abutted against the outer peripheral surface of the iron core 200. Thus, after the iron core 200 is sleeved on the first annular boss 120, the respective positioning portions 140 can also position the outer peripheral surface of the iron core 200, further enhancing the positioning accuracy of the iron core 200.

[0048] Combined with Figures 2 to 4 , in one embodiment, the inner hole of the iron core 200 is a stepped hole, which includes a first hole 201 and a second hole 202. The inner diameter of the first hole 201 is larger than the inner diameter of the second hole 202, so that a stepped surface 203 is formed at the connection between the hole wall of the first hole 201 and the hole wall of the second hole 202. The second hole 202 is closer to the annular plate 110 than the first hole 201.

[0049] The inner diameter of the first hole 201 is adapted to the outer diameter of the first annular boss 120. Therefore, when the iron core 200 is sleeved on the first annular boss 120, the first annular boss 120 is located within the first hole 201. The stepped surface 203 faces one end of the first annular boss 120 facing away from the annular plate 110 and abuts against one end of the first annular boss 120 facing away from the annular plate 110. Thus, by abutting the stepped surface 203 against one end of the first annular boss 120 facing away from the annular plate 110, the axial positioning of the iron core 200 can also be achieved.

[0050] Combined with Figures 2 to 4 , in one embodiment, the hole wall of the second hole 202 is coplanar with the inner peripheral surface of the first annular boss 120, that is, the inner diameter of the second hole 202 is equal to the inner diameter of the first annular boss 120.

[0051] When the surface-mounted rotor is actually used, the iron core 200 needs to be sleeved on a core shaft (not shown). Since the hole wall of the second hole 202 is coplanar with the inner peripheral surface of the first annular boss 120, it is convenient for the second hole 202 and the first annular boss 120 to jointly achieve stable cooperation with the core shaft.

[0052] Combined with Figures 1 to 2 , in one embodiment, the surface-mounted rotor further includes a protective sleeve 400. The protective sleeve 400 is sleeved outside the plurality of magnetic blocks 300 for protecting the magnetic blocks 300. The protective sleeve 400 is in interference fit with the magnetic blocks 300.

[0053] Optionally, the protective sleeve 400 is a carbon fiber protective sleeve. The carbon fiber protective sleeve has high tensile strength and can effectively prevent the magnetic blocks 300 from loosening and falling off.

[0054] In one embodiment, the outer peripheral surface of the protective sleeve 400 is coplanar with the outer peripheral surface of the second annular boss 130, so that the outer diameter of the outer peripheral surface of the surface-mounted rotor is relatively consistent.

[0055] In one embodiment, along the axial direction of the iron core 200, the protective sleeve 400 is located in the middle of the magnetic blocks 300, which is beneficial to providing better protection for the magnetic blocks 300.

[0056] In one embodiment, one end of the protective sleeve 400 abuts against one end of the second annular boss 130 facing away from the annular plate 110. When actually sleeving the protective sleeve 400 outside the magnetic blocks 300, when one end of the protective sleeve 400 abuts against one end of the second annular boss 130 facing away from the annular plate 110, the operation can be stopped, which is convenient for positioning the protective sleeve 400.

[0057] In one embodiment, the protruding length of the second annular boss 130 relative to the annular plate 110 is less than the protruding length of the first annular boss 120 relative to the annular plate 110. In this way, the protruding length of the first annular boss 120 is longer, which facilitates the connection reliability between the first annular boss 120 and the iron core 200.

[0058] In one embodiment, one end of the outer peripheral surface of the magnetic block 300 facing away from the iron core 200 abuts against the inner peripheral surface of the second annular boss 130, so that the structure between the second annular boss 130 and the magnet 300 is compact.

[0059] Optionally, the material of the magnetic isolation plate is aluminum alloy. The magnetic isolation plate can also be other materials with magnetic isolation effect.

[0060] In one embodiment, the surface-mounted rotor includes two magnetic isolation plate structures 100, and the two magnetic isolation plate structures 100 are respectively located at both axial ends of the iron core 200. In this embodiment, the magnetic isolation plate structures 100 can play a role in preventing magnetic leakage at both ends of the surface-mounted rotor respectively. At the same time, when the iron core 200 adopts a laminated structure of multiple laminations, the multiple laminations are not easily detached due to the limitation and protection of the magnetic isolation plate structures 100 at both ends.

[0061] It can be understood that among the two magnetic isolation plate structures 100, one magnetic isolation plate structure 100 cooperates with one end of the iron core 200 and the magnet 300, and the other magnetic isolation plate structure 100 cooperates with the other end of the iron core 200 and the magnet 300. The cooperation modes of the two magnetic isolation plate structures 100 with the iron core 200 and the magnet 300 are the same.

[0062] An embodiment of the present application provides a motor, including the surface-mounted rotor in any one of the above embodiments.

[0063] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0064] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A surface mounted rotor, characterized in that: include: A magnetic isolation plate structure, an iron core and a plurality of magnetic blocks; The magnetic isolation plate structure comprises: an annular plate, a first annular boss, a second annular boss and a plurality of positioning parts; The first annular boss is arranged on the inner edge of the annular plate, and the second annular boss is arranged on the outer edge of the annular plate. The protruding direction of the second annular boss relative to the annular plate and the protruding direction of the first annular boss relative to the annular plate are both parallel to the axial direction of the annular plate; the iron core is sleeved and fixed on the first annular boss and is adapted to the outer diameter of the first annular boss; The multiple positioning parts are located between the first annular boss and the second annular boss, and the multiple positioning parts are evenly spaced along the circumference of the annular plate. A spacing space is formed between any two adjacent positioning parts. The multiple magnetic blocks are arranged in the multiple spacing spaces one by one, and the magnetic blocks are fixed to the outer circumferential surface of the iron core.

2. The surface mounted rotor according to claim 1, characterized in that: The inner hole of the iron core is a stepped hole, which includes a first hole and a second hole, the inner diameter of the first hole is larger than the inner diameter of the second hole, and a step surface is formed at the connection between the hole wall of the first hole and the hole wall of the second hole; The inner diameter of the first hole matches the outer diameter of the first annular boss, the step surface abuts against an end of the first annular boss facing away from the annular plate; the hole wall of the second hole is coplanar with the inner circumferential surface of the first annular boss.

3. The surface mounted rotor according to claim 1, characterized in that: One end of each positioning portion facing away from the central axis of the annular plate is fixedly connected to the inner circumferential surface of the second annular boss.

4. The surface mounted rotor according to claim 1, characterized in that: The same end of each magnetic block along the circumference of the annular plate is respectively fitted and fixed to the adjacent positioning parts, and the other end of each magnetic block along the circumference of the annular plate has a gap with the adjacent positioning parts.

5. The surface mounted rotor according to claim 1, characterized in that: The annular plate, the first annular boss, the second annular boss and the plurality of positioning portions are an integrated structure.

6. The surface mounted rotor according to claim 1, characterized in that: The iron core is bonded and fixed to the magnetic isolation plate structure.

7. The surface mounted rotor according to claim 1, characterized in that: The number of the magnetic isolation plate structures is two, and the two magnetic isolation plate structures are respectively located at two ends of the iron core along the axial direction.

8. The surface mounted rotor according to claim 1, characterized in that: A protruding length of the second annular boss relative to the annular plate is smaller than a protruding length of the first annular boss relative to the annular plate.

9. The surface mounted rotor according to claim 1, characterized in that: It also includes a protective sleeve, which is arranged outside the multiple magnetic blocks; the outer circumferential surface of the protective sleeve is coplanar with the outer circumferential surface of the second annular boss.

10. A motor, characterized in that: A surface mounted rotor comprising the surface mounted rotor according to any one of claims 1 to 9.

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