Magnetic ring shaft cover and cross-flow fan blade

Abstract

The utility model discloses a magnetic ring shaft cover and a cross-flow fan blade. The magnetic ring shaft cover comprises a magnetic ring cover, a magnetic ring body and a shaft cover, a first mounting hole is formed in the middle of the magnetic ring cover, and a first positioning groove is formed in the hole wall of the first mounting hole. The magnet ring body and the magnet ring cover are integrally injection-molded. A plurality of blades are arranged on the lower end face of the shaft cover and distributed in the circumferential direction of the shaft cover, a positioning ring is arranged on the upper end face of the shaft cover, a first positioning block is arranged on the outer circumferential wall of the positioning ring, the positioning ring can be upwards inserted into the first mounting hole so that the outer circumferential wall of the positioning ring can be attached to the hole wall of the first mounting hole, and the first positioning block can be inserted into the first positioning groove. The magnetic ring cover and the magnetic ring body of the magnetic ring shaft cover are relatively fixed through integral injection molding, and the shaft cover and the magnetic ring cover are mutually connected through the first positioning structure and the second positioning structure. When the blade shape needs to be replaced, due to the fact that the magnetic ring body and the shaft cover are not subjected to integral injection molding, mold opening of the magnetic ring cover and the magnetic ring body is avoided, cost is saved, and the forming period of a product is shortened.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a magnetic ring shaft cover and a cross-flow fan blade. Background Technology

[0002] Traditional magnetic ring shaft covers are integrated designs. When the blade shape of the cross-flow fan needs to be changed, the blade groove on the magnetic ring shaft cover is already fixed and cannot be adapted to the new blade shape. The entire magnetic ring shaft cover needs to be re-molded, resulting in a long product molding cycle and high manufacturing cost. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a magnetic ring shaft cover and a cross-flow fan blade.

[0004] In a first aspect, this utility model provides a magnetic ring shaft cover, the magnetic ring shaft cover comprising:

[0005] Magnetic ring cover, wherein the magnetic ring cover is provided with a first positioning structure;

[0006] A magnetic ring body, which is coaxially arranged with the magnetic ring cover and integrally injection molded;

[0007] A shaft cover is provided, which is coaxially arranged with the magnetic ring cover. The lower end face of the shaft cover is provided with multiple blades, which are distributed circumferentially along the shaft cover. The shaft cover is provided with a second positioning structure. The first positioning structure and the second positioning structure cooperate to assemble the magnetic ring cover and the shaft cover together and coaxially arrange them.

[0008] The magnetic ring shaft cover according to the embodiments of this utility model has at least the following technical effects: the magnetic ring cover and the magnetic ring body of the magnetic ring shaft cover are relatively fixed by integral injection molding, and the shaft cover and the magnetic ring cover are connected to each other by the first positioning structure and the second positioning structure. When it is necessary to change the blade shape, since the magnetic ring body and the shaft cover are not integrally injection molded, it is avoided that the magnetic ring cover and the magnetic ring body need to be re-molded, thereby saving costs and shortening the product molding cycle.

[0009] According to some embodiments of this utility model, the magnetic ring cover has a first mounting hole in the middle, the hole wall of the first mounting hole has a first positioning groove, and the first positioning structure is the first mounting hole; the upper end face of the shaft cover has a positioning ring, the second positioning structure is the positioning ring, the outer peripheral wall of the positioning ring has a first positioning block, the positioning ring can be inserted upward into the first mounting hole so that the outer peripheral wall of the positioning ring fits against the hole wall of the first mounting hole, and the first positioning block is inserted into the first positioning groove, and the shaft cover and the magnetic ring cover are fixed relative to each other by ultrasonic welding.

[0010] According to some embodiments of the present invention, the magnetic ring shaft cover further includes a bushing portion, the upper end of which is connected to the lower end face of the shaft cover, the bushing portion having an inner cavity, and the middle portion of the shaft cover having a through hole communicating with the inner cavity of the bushing portion; the magnetic ring shaft cover further includes a rotating shaft, the lower end of which is inserted into the inner cavity of the bushing portion through the through hole, and the rotating shaft and the through hole being interference-fitted.

[0011] According to some embodiments of the present invention, the upper end face of the shaft cover is provided with a first retaining ring, the first retaining ring is coaxially arranged with the shaft cover, and the rotating shaft passes through the first retaining ring.

[0012] According to some embodiments of the present invention, the lower end face of the shaft cover is provided with a plurality of reinforcing ribs, the plurality of reinforcing ribs are distributed along the circumference of the shaft cover, and the reinforcing ribs are respectively fixedly connected to the shaft cover and the bushing portion.

[0013] According to some embodiments of the present invention, the upper end face of the magnetic ring cover is provided with an annular protrusion, the annular protrusion is coaxially arranged with the magnetic ring cover, the upper end face of the annular protrusion is provided with an annular groove, and the lower end of the magnetic ring body is inserted into the annular groove.

[0014] According to some embodiments of the present invention, the inner peripheral wall of the magnetic ring body is provided with a plurality of second positioning blocks, the plurality of second positioning blocks are distributed along the circumference of the magnetic ring body, the side wall of the annular groove near the axis of the magnetic ring cover is provided with a plurality of second positioning grooves, the second positioning grooves extend upward and penetrate through the upper end surface of the annular protrusion, the plurality of second positioning grooves are distributed along the circumference of the magnetic ring cover, the plurality of second positioning blocks correspond one-to-one with the plurality of second positioning grooves, and the second positioning blocks are inserted into the second positioning grooves.

[0015] According to some embodiments of the present invention, the annular groove is provided with a plurality of third positioning grooves on the side wall away from the axis of the magnetic ring cover. The plurality of third positioning grooves are distributed circumferentially along the magnetic ring cover. The outer peripheral wall of the magnetic ring body is provided with a plurality of third positioning blocks. The plurality of third positioning blocks are distributed circumferentially along the magnetic ring body. The plurality of third positioning blocks correspond one-to-one with the plurality of third positioning grooves. The third positioning blocks are inserted into the third positioning grooves. The upper end face of the annular protrusion is provided with a second retaining ring. The second retaining ring is coaxially arranged with the annular protrusion.

[0016] According to some embodiments of this utility model, the shaft cover has a second mounting hole in the middle, the second positioning structure is the second mounting hole, and the hole wall of the second mounting hole has a fourth positioning groove; the lower end of the magnetic ring cover protrudes downward to form a circular block, the first positioning structure is the circular block, the outer peripheral wall of the circular block has a fourth positioning block, the circular block can be inserted downward into the second mounting hole so that the outer peripheral wall of the circular block fits against the hole wall of the second mounting hole, and the fourth positioning block is inserted into the fourth positioning groove, the shaft cover and the magnetic ring cover are fixed relative to each other by ultrasonic welding; the magnetic ring shaft cover also includes a bushing part and a rotating shaft, the bushing part is located in the middle of the magnetic ring cover, and the lower end of the rotating shaft is inserted into the bushing part and fixedly connected to the bushing part.

[0017] Secondly, this utility model embodiment also provides a cross-flow fan blade, including a magnetic ring shaft cover according to the first aspect embodiment of this utility model described above.

[0018] The cross-flow fan blade according to the embodiments of this utility model has at least the following technical effects: The cross-flow fan blade uses this magnetic ring shaft cover, and the magnetic ring cover and the magnetic ring body are relatively fixed through integral injection molding. The shaft cover and the magnetic ring cover are connected to each other through a first positioning structure and a second positioning structure. When the blade shape needs to be changed, since the magnetic ring body and the shaft cover are not integrally injection molded, it avoids the need to re-mold the magnetic ring cover and the magnetic ring body, thereby saving costs and shortening the product molding cycle.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the magnetic ring shaft cover according to some embodiments of the present invention;

[0022] Figure 2 This is an exploded view of the magnetic ring shaft cover of some embodiments of this utility model;

[0023] Figure 3 This is a cross-sectional view of the magnetic ring shaft cover of some embodiments of this utility model;

[0024] Figure 4 This is an exploded sectional view of the magnetic ring shaft cover of some embodiments of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the magnetic ring cover according to some embodiments of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the magnetic ring body according to some embodiments of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the shaft cover according to some embodiments of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the cross-flow fan blades in some embodiments of this utility model;

[0029] Figure 9 This is an exploded view of another magnetic ring shaft cover according to some embodiments of this utility model;

[0030] Figure 10 This is an exploded view of another magnetic ring cover according to some embodiments of this utility model.

[0031] Icon labels:

[0032] Magnetic ring cover 100, first mounting hole 101, first positioning groove 110, annular protrusion 120, annular groove 130, second positioning groove 131, third positioning groove 132, second retaining ring 140;

[0033] Magnetic ring 200, second positioning block 210, third positioning block 220;

[0034] Shaft cover 300, blade 301, positioning ring 310, first positioning block 320, through hole 330, first retaining ring 340;

[0035] Bushing 400, rotating shaft 410, reinforcing rib 420;

[0036] Second mounting hole 501, fourth positioning groove 502, round block 503, fourth positioning block 504. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0042] According to some embodiments of this utility model, refer to Figures 1 to 8 The magnetic ring cover includes a magnetic ring cover 100, a magnetic ring body 200, and a shaft cover 300. The magnetic ring cover 100 has a first positioning structure. The magnetic ring body 200 is coaxially arranged with the magnetic ring cover 100 and integrally injection molded. The shaft cover 300 is coaxially arranged with the magnetic ring cover 100. The lower end face of the shaft cover 300 has multiple blades 301 distributed circumferentially along the shaft cover 300. The shaft cover 300 has a second positioning structure. The first positioning structure and the second positioning structure are positioned and engaged to assemble the magnetic ring cover 100 and the shaft cover 300 together and ensure their coaxial arrangement. The assembly of the first positioning structure and the second positioning structure guarantees the concentricity of the magnetic ring cover 100 and the shaft cover 300.

[0043] The magnetic ring cover 100 has a first mounting hole 101 in the middle, and the hole wall of the first mounting hole 101 has a first positioning groove 110. The first positioning structure is the first mounting hole 101. The upper end face of the shaft cover 300 has a positioning ring 310. The second positioning structure is the positioning ring 310. The outer peripheral wall of the positioning ring 310 has a first positioning block 320. The positioning ring 310 can be inserted upward into the first mounting hole 101 so that the outer peripheral wall of the positioning ring 310 fits against the hole wall of the first mounting hole 101, and the first positioning block 320 is inserted into the first positioning groove 110. The shaft cover 300 and the magnetic ring cover 100 are fixed to each other by ultrasonic welding.

[0044] Understandably, the magnetic ring cover 100 and the magnetic ring body 200 of the magnetic ring shaft cover are relatively fixed through integral injection molding, and the shaft cover 300 and the magnetic ring cover 100 are connected to each other by the insertion of the first positioning block 320 into the first positioning groove 110. When it is necessary to change the blade shape, since the magnetic ring body 200 and the shaft cover 300 are not integrally injection molded, it is not necessary to re-mold the magnetic ring cover 100 and the magnetic ring body 200, thereby saving costs and shortening the product molding cycle.

[0045] Preferably, the upper end face of the shaft cover 300 is fitted with the lower end face of the magnetic ring cover 100 and is welded and fixed by ultrasonic welding or laser welding process to enhance the connection stability between the shaft cover 300 and the magnetic ring cover 100.

[0046] According to some embodiments of this utility model, refer to Figure 9 and Figure 10 The shaft cover 300 has a second mounting hole 501 in the middle, and the second positioning structure is the second mounting hole 501. The hole wall of the second mounting hole 501 has a fourth positioning groove 502. The lower end of the magnetic ring cover 100 protrudes downward to form a circular block 503. The first positioning structure is the circular block 503. The outer peripheral wall of the circular block 503 has a fourth positioning block 504. The circular block 503 can be inserted downward into the second mounting hole 501 so that the outer peripheral wall of the circular block 503 fits against the hole wall of the second mounting hole 501, and the fourth positioning block 504 is inserted into the fourth positioning groove 502. The shaft cover 300 and the magnetic ring cover 100 are fixed to each other by ultrasonic welding. The magnetic ring shaft cover also includes a bushing part 400 and a rotating shaft 410. The bushing part 400 is located in the middle of the magnetic ring cover 100. The lower end of the rotating shaft 410 is inserted into the bushing part 400 and fixedly connected to the bushing part 400.

[0047] It is also understandable that the shaft cover 300 can be shipped separately without being assembled with the magnetic ring cover 100. When a defective shaft cover 300 occurs, since the shaft cover 300 and the magnetic ring body 200 are not integrally injection molded, waste of the magnetic ring body 200 is reduced, thus lowering costs. Moreover, when the shape of the blade 301 needs to be changed, only the mold of the shaft cover 300 needs to be changed. The magnetic ring cover 100 and the magnetic ring body 200 are universal and standardized, directly avoiding the need to re-mold the magnetic ring cover 100 and the magnetic ring body 200, saving costs and improving production efficiency. This achieves motor platform versatility within the same specification.

[0048] Preferred, refer to Figure 4 The inner diameter D1 of the magnetic ring cover 100 is less than or equal to the inner diameter D2 of the magnetic ring body 200, and D2-D1 ≤ 8mm. The thickness L of the magnetic ring cover 100 in the vertical direction is 1.5-5mm. If L is less than 1.5mm, the magnetic ring cover 100 is easily welded through; if L is greater than 5mm, the magnetic ring cover 100 will shrink. The lower end face of the magnetic ring cover 100 has a contact surface, which is connected to the upper end face of the shaft cover 300. D3 is the outer diameter of the contact surface, and D4 is the outer diameter of the shaft cover 300. D4-D3 ≥ 10mm to ensure a certain welding strength. Multiple corrugated solder lines are designed on the contact surface of the magnetic ring cover 100. These corrugated solder lines can be designed on the contact surface or on the upper end face of the shaft cover 300, for the purpose of soldering and achieving a firm connection.

[0049] According to some embodiments of this utility model, refer to Figure 3 , Figure 4 and Figure 7 The magnetic ring shaft cover also includes a bushing portion 400, the upper end of which is connected to the lower end face of the shaft cover 300. The bushing portion 400 has an inner cavity, and the middle part of the shaft cover 300 is provided with a through hole 330, which communicates with the inner cavity of the bushing portion 400. The magnetic ring shaft cover also includes a rotating shaft 410, the lower end of which is inserted into the inner cavity of the bushing portion 400 through the through hole 330, and the rotating shaft 410 and the through hole 330 are interference-fitted. The driving component can drive the rotating shaft 410 to rotate, thereby driving the magnetic ring shaft cover to rotate.

[0050] According to some embodiments of this utility model, refer to Figures 2 to 4 The upper end face of the shaft cover 300 is provided with a first retaining ring 340. The first retaining ring 340 is coaxially arranged with the shaft cover 300. The rotating shaft 410 passes through the first retaining ring 340. The first retaining ring 340 can protect the rotating shaft 410 and prevent the rotating shaft 410 from being collided.

[0051] According to some embodiments of this utility model, refer to Figure 3 , Figure 4 and Figure 7 The lower end face of the shaft cover 300 is provided with multiple reinforcing ribs 420. The multiple reinforcing ribs 420 are distributed circumferentially along the shaft cover 300. The reinforcing ribs 420 are fixedly connected to the shaft cover 300 and the bushing part 400 respectively, thereby improving the connection stability between the shaft cover 300 and the bushing part 400.

[0052] According to some embodiments of this utility model, refer to Figures 3 to 5 The upper end face of the magnetic ring cover 100 is provided with an annular protrusion 120, which is coaxially arranged with the magnetic ring cover 100. The upper end face of the annular protrusion 120 is provided with an annular groove 130, and the lower end of the magnetic ring body 200 is inserted into the annular groove 130 to facilitate the positioning and engagement of the magnetic ring body 200 and the magnetic ring cover 100.

[0053] Preferred, refer to Figures 3 to 5 The inner peripheral wall of the magnetic ring body 200 is provided with a plurality of second positioning blocks 210, which are distributed circumferentially along the magnetic ring body 200. The side wall of the annular groove 130 near the axis of the magnetic ring cover 100 is provided with a plurality of second positioning grooves 131, which extend upward and penetrate through the upper end face of the annular protrusion 120. The plurality of second positioning grooves 131 are distributed circumferentially along the magnetic ring cover 100. The plurality of second positioning blocks 210 correspond one-to-one with the plurality of second positioning grooves 131. The second positioning blocks 210 are inserted into the second positioning grooves 131 to facilitate the positioning and engagement of the magnetic ring body 200 and the magnetic ring cover 100.

[0054] Preferred, refer to Figures 3 to 5The annular groove 130 has multiple third positioning grooves 132 on its side wall away from the axis of the magnetic ring cover 100. The multiple third positioning grooves 132 are distributed circumferentially along the magnetic ring cover 100. The outer peripheral wall of the magnetic ring body 200 has multiple third positioning blocks 220. The multiple third positioning blocks 220 are distributed circumferentially along the magnetic ring body 200. The multiple third positioning blocks 220 correspond one-to-one with the multiple third positioning grooves 132. The third positioning blocks 220 are inserted into the third positioning grooves 132. The upper and lower groove walls of the third positioning grooves 132 can abut against the upper and lower ends of the third positioning blocks 220, thereby restricting the magnetic ring body 200 from moving in the vertical direction.

[0055] Preferred, refer to Figures 3 to 5 The upper end face of the annular protrusion 120 is provided with a second retaining ring 140, which is coaxially arranged with the annular protrusion 120. The second retaining ring 140 can protect the rotating shaft 410 and prevent the rotating shaft 410 from being hit.

[0056] In this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A magnetic ring shaft cover, characterized in that, include: A magnetic ring cover (100) is provided with a first positioning structure; A magnetic ring body (200) is coaxially arranged with the magnetic ring cover (100) and integrally injection molded; A shaft cover (300) is coaxially arranged with the magnetic ring cover (100). The lower end face of the shaft cover (300) is provided with a plurality of blades (301). The plurality of blades (301) are distributed circumferentially along the shaft cover (300). The shaft cover (300) is provided with a second positioning structure. The first positioning structure and the second positioning structure cooperate to assemble the magnetic ring cover (100) and the shaft cover (300) together and coaxially arrange them.

2. The magnetic ring shaft cover according to claim 1, characterized in that, The magnetic ring cover (100) has a first mounting hole (101) in the middle, and the hole wall of the first mounting hole (101) has a first positioning groove (110). The first positioning structure is the first mounting hole (101). The upper end face of the shaft cover (300) has a positioning ring (310), and the second positioning structure is the positioning ring (310). The outer peripheral wall of the positioning ring (310) has a first positioning block (320). The positioning ring (310) can be inserted upward into the first mounting hole (101) so that the outer peripheral wall of the positioning ring (310) fits against the hole wall of the first mounting hole (101), and the first positioning block (320) is inserted into the first positioning groove (110). The shaft cover (300) and the magnetic ring cover (100) are fixed relative to each other by ultrasonic welding.

3. The magnetic ring shaft cover according to claim 2, characterized in that, The magnetic ring shaft cover also includes a bushing portion (400), the upper end of which is connected to the lower end face of the shaft cover (300). The bushing portion (400) has an inner cavity, and the middle part of the shaft cover (300) is provided with a through hole (330), which communicates with the inner cavity of the bushing portion (400). The magnetic ring shaft cover also includes a rotating shaft (410), the lower end of which is inserted into the inner cavity of the bushing portion (400) through the through hole (330), and the rotating shaft (410) and the through hole (330) are interference-fitted.

4. The magnetic ring shaft cover according to claim 3, characterized in that, The upper end face of the shaft cover (300) is provided with a first retaining ring (340), the first retaining ring (340) is coaxially arranged with the shaft cover (300), and the rotating shaft (410) passes through the first retaining ring (340).

5. The magnetic ring shaft cover according to claim 3, characterized in that, The lower end face of the shaft cover (300) is provided with a plurality of reinforcing ribs (420), which are distributed circumferentially along the shaft cover (300). The reinforcing ribs (420) are fixedly connected to the shaft cover (300) and the bushing portion (400) respectively.

6. The magnetic ring shaft cover according to claim 1, characterized in that, The upper end face of the magnetic ring cover (100) is provided with an annular protrusion (120), the annular protrusion (120) is coaxially arranged with the magnetic ring cover (100), the upper end face of the annular protrusion (120) is provided with an annular groove (130), and the lower end of the magnetic ring body (200) is inserted into the annular groove (130).

7. The magnetic ring shaft cover according to claim 6, characterized in that, The inner peripheral wall of the magnetic ring body (200) is provided with a plurality of second positioning blocks (210), which are distributed circumferentially along the magnetic ring body (200). The side wall of the annular groove (130) near the axis of the magnetic ring cover (100) is provided with a plurality of second positioning grooves (131), which extend upward through the upper end face of the annular protrusion (120). The plurality of second positioning grooves (131) are distributed circumferentially along the magnetic ring cover (100), and the plurality of second positioning blocks (210) correspond one-to-one with the plurality of second positioning grooves (131). The second positioning blocks (210) are inserted into the second positioning grooves (131).

8. The magnetic ring shaft cover according to claim 6, characterized in that, The annular groove (130) has a plurality of third positioning grooves (132) on its sidewall away from the axis of the magnetic ring cover (100). The plurality of third positioning grooves (132) are distributed circumferentially along the magnetic ring cover (100). The outer peripheral wall of the magnetic ring body (200) has a plurality of third positioning blocks (220). The plurality of third positioning blocks (220) are distributed circumferentially along the magnetic ring body (200). The plurality of third positioning blocks (220) correspond one-to-one with the plurality of third positioning grooves (132). The third positioning blocks (220) are inserted into the third positioning grooves (132). The upper end face of the annular protrusion (120) has a second retaining ring (140). The second retaining ring (140) is coaxially arranged with the annular protrusion (120).

9. The magnetic ring shaft cover according to claim 1, characterized in that, The shaft cover (300) has a second mounting hole (501) in the middle, and the second positioning structure is the second mounting hole (501). The hole wall of the second mounting hole (501) is provided with a fourth positioning groove (502). The lower end of the magnetic ring cover (100) protrudes downward to form a circular block (503). The first positioning structure is the circular block (503). The outer peripheral wall of the circular block (503) is provided with a fourth positioning block (504). The circular block (503) can be inserted downward into the second mounting hole (501) so that the circular block (504) can be inserted downward into the second mounting hole (501). 03) The outer peripheral wall of the fourth positioning block (504) is attached to the hole wall of the second mounting hole (501), and the fourth positioning block (504) is inserted into the fourth positioning groove (502). The shaft cover (300) and the magnetic ring cover (100) are fixed to each other by ultrasonic welding. The magnetic ring shaft cover also includes a bushing part (400) and a rotating shaft (410). The bushing part (400) is located in the middle of the magnetic ring cover (100). The lower end of the rotating shaft (410) is inserted into the bushing part (400) and fixedly connected to the bushing part (400).

10. A cross-flow fan blade, characterized in that, It includes a magnetic ring shaft cover as described in any one of claims 1 to 9.

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