Outer rotor magnetic steel sheet connection structure

Abstract

The utility model discloses an outer rotor magnetic steel sheet connecting structure, which belongs to the technical field of outer rotor motors, and comprises a shell (1), a mounting ring (2) and magnetic steel sheets (3), the mounting ring (2) is arranged in the shell (1), the magnetic steel sheets (3) are uniformly distributed in the mounting ring (2) to serve as a motor outer rotor, bumps (4) are arranged between the magnetic steel sheets (3), the bumps (4) are arranged on the inner ring of the mounting ring (2), and the mounting ring (2) is arranged on the outer ring of the mounting ring (2). The magnetic steel sheets (3) on the mounting ring (2) can be positioned and fixed through the bumps (4), so that the mounting positions of the magnetic steel sheets (3) are more accurate, the displacement risk of the magnetic steel sheets (3) during operation of the motor is effectively reduced, the stability of the motor is improved, the service life of the motor is prolonged, the connection between the magnetic steel sheets (3) and the shell (1) is more stable, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the outer rotor motor technical field relates to an outer rotor magnetic steel sheet connecting structure. BACKGROUND

[0002] In the motor system, the structure design of the outer rotor and the connection mode of the magnetic steel play a key role in the performance of the motor. The traditional outer rotor magnetic steel connection mode has many drawbacks. On the one hand, the fixation of the magnetic steel sheet is not stable enough, and when the motor is running at high speed, the magnetic steel sheet is prone to displacement or even falling off, which not only affects the stability of the motor operation, but also may cause motor failure and shorten the service life of the motor.

[0003] In the prior art, the magnetic steel sheet is installed by using a spacer sleeve technology, such as a motor outer rotor structure of an electric vehicle disclosed in Chinese Patent Application No. CN201120173399.5, which comprises an end cover and an iron ring fixed on the end cover. The end cover is installed on the shaft through a bearing. A plurality of magnetic steel sheets are arranged on the inner wall of the iron ring. A fixed support is arranged on the inner wall of the iron ring. A plurality of support arms are arranged on the fixed support in a symmetrical manner. The support arms separate the magnetic steel sheets by a certain distance. In this scheme, when fixing the magnetic steel sheet, a fixed support is first fixed on the inner wall of the iron ring, then the magnetic steel sheet is inserted into the support arm, and then another fixed support is symmetrically sleeved on the inner wall of the iron ring. Finally, the magnetic steel sheet and the fixed support are bonded to the inner wall of the iron ring with glue.

[0004] However, this requires that a ring groove be formed on the inner wall of the inner wall of the iron ring for positioning and fixing the support, and when the glue is dropped to fix the magnetic steel sheet, the fixed support will hinder the fixation of the magnetic steel sheet on the inner wall of the iron ring, which is prone to cause the whole to fall off. UTILITY MODEL CONTENTS

[0005] The utility model aims to overcome the technical problems of unstable installation and positioning of the magnetic steel sheet of the outer rotor in the prior art, which is prone to cause displacement and falling off of the magnetic steel sheet, and provides an outer rotor magnetic steel sheet connecting structure capable of accurately positioning the magnetic steel sheet.

[0006] To solve the above problems, the utility model provides an outer rotor magnetic steel sheet connecting structure, which comprises a shell, a mounting ring and magnetic steel sheets. The mounting ring is arranged in the shell, and the magnetic steel sheets are arranged in the mounting ring in a uniform manner. As an outer rotor of a motor, the magnetic steel sheets are provided with protrusions between them, and the protrusions are arranged on the inner ring of the mounting ring.

[0007] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0008] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0009] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0010] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0011] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0012] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0013] As a further improved measure of the utility model, the convex block is long strip shape, and the both ends of the convex block are provided with an arc, and the setting direction of the long end of the convex block is perpendicularly arranged with the circumference of the mounting ring, and the arc can avoid stress concentration phenomenon of the convex block during the operation of the motor, and improve the reliability of the structure.

[0014] Compared with the prior art, the utility model has the advantages that the position of the magnetic steel sheet is fixed through the convex block, the connection stability of the magnetic steel sheet is enhanced, the displacement risk of the magnetic steel sheet during the operation of the motor is effectively reduced, the stability and service life of the motor are improved, the magnetic field distribution is optimized, the energy conversion efficiency of the motor is improved, the motor is more efficient during operation, the overall structure is compact and stable, the space utilization and structural reliability are improved, and the utility model is suitable for various application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the utility model discloses a outer rotor magnetic steel sheet connecting structure.

[0016] Figure 2 is Figure 1 the section view of direction A-A in.

[0017] Figure 3 is a perspective view of the utility model discloses a outer rotor magnetic steel sheet connecting structure.

[0018] Figure 4 is a front view of the utility model discloses bearing end cover and mounting ring connecting structure.

[0019] Figure 5 is a perspective view of the utility model discloses bearing end cover and mounting ring assembly structure.

[0020] Figure 6 is a front view of the utility model discloses mounting ring.

[0021] Figure 7 is a perspective view of the utility model discloses mounting ring.

[0022] Explanation of the attached drawings: 1 shell;2, mounting ring;3, magnetic steel sheet;4, convex block;5, wheel rim;6, bearing end cover;7, bearing part;8, end cover part;9, connecting part;10, fixed part;11, reinforcing rib. DETAILED DESCRIPTION

[0023] In order to make the utility model's purpose, technical scheme and advantage more clearly, following combining with the attached drawing and example, this utility model carries out further detailed explanation. It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0024] On the contrary, the utility model covers any substitution, modification, equivalent method and scheme made on the essence and scope of the utility model defined by the claim. Further, in order to make the public have a better understanding of the utility model, in the following detailed description of the utility model, some specific details are described in detail. The utility model can also be completely understood without the description of these details for those skilled in the art.

[0025] As shown in Figures 1, 2, and 3, an external rotor magnet plate connection structure includes a housing 1, a mounting ring 2, and magnet plates 3. The mounting ring 2 is disposed inside the housing 1, and the magnet plates 3 are evenly distributed within the mounting ring 2, serving as the external rotor of the motor. Protrusions 4 are provided between the magnet plates 3. The protrusions 4 are elongated strips with curved ends. The direction of the long ends of the protrusions 4 is perpendicular to the circumference of the mounting ring 2. This curvature avoids stress concentration on the protrusions 4 during motor operation, improving the reliability of the structure. Furthermore, the direction of the long ends of the protrusions 4 being perpendicular to the circumference of the mounting ring 2 better constrains the circumferential displacement of the magnet plates 3, ensuring the relative positional stability between the magnet plates 3.

[0026] like Figure 3 , Figure 6 and Figure 7 As shown, the protrusions 4 are set on the inner ring of the mounting ring 2, and there are two rows arranged along the axial direction of the mounting ring 2. This arrangement achieves the best fixing effect and magnetic field distribution of the magnet sheet 3. The height of the protrusions 4 is less than the height of the magnet sheet 3. This design ensures that after the magnet sheet 3 is installed, the protrusions 4 will not affect the magnetic field output of the magnet sheet 3, and can effectively fix the magnet sheet 3.

[0027] like Figure 3 , Figure 4 , Figure 5 and Figure 6 The housing 1 shown includes a wheel rim 5 and a bearing end cover 6. A mounting ring 2 is welded to the bearing end cover 6. The bearing end cover 6 is located inside the wheel rim 5. The bearing end cover 6 includes a bearing portion 7, an end cover portion 8, a connecting portion 9, and a fixing portion 10. The end cover portion 8 is circular. The bearing portion 7 is located in the middle of the end cover portion 8. The connecting portion 9 is annular. One side of the annular part is connected to the end cover portion 8, and the other side is connected to the fixing portion 10. The connecting portion 9 is located inside the wheel rim 5, and the fixing portion 10 is snapped onto the wheel rim 5. The bearing end cover 6 is fixedly connected to the wheel rim 5.

[0028] like Figure 4 and Figure 5 As shown, a reinforcing rib 11 is provided on the end cover portion 8. The presence of the reinforcing rib 11 enhances the strength of the end cover portion 8, preventing deformation of the end cover portion 8 due to various forces during motor operation, and further improving the reliability of the structure.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. An outer rotor magnet sheet connecting structure comprising a housing (1), a mounting ring (2) and a magnet sheet (3), characterized in that, The mounting ring (2) is arranged in the shell (1), the magnetic steel sheets (3) are arranged in the mounting ring (2) uniformly, the magnetic steel sheets (3) are used as an outer rotor of a motor, and the protrusions (4) are arranged between the magnetic steel sheets (3); the protrusions (4) are arranged on the inner ring of the mounting ring (2).

2. The outer rotor magnetic steel sheet connecting structure according to claim 1, characterized by: The protrusions (4) are long strips, the protrusions (4) are provided with an arc at two ends, and the setting direction of the long end of the protrusion (4) is perpendicular to the circumferential direction of the mounting ring (2).

3. The outer rotor magnetic steel sheet connecting structure according to claim 2, characterized by: The protrusions (4) are arranged in 1-4 rows on the mounting ring (2) and are arranged in the axial direction of the mounting ring (2).

4. The outer rotor magnetic steel sheet connecting structure according to claim 3, characterized by: The height of the protrusion (4) is less than the height of the magnetic steel sheet (3).

5. The outer rotor magnetic steel sheet connecting structure according to claim 4, characterized by: The shell (1) comprises a wheel rim (5) and a bearing end cover (6), the bearing end cover (6) is arranged in the wheel rim (5), and the mounting ring (2) is arranged in the bearing end cover (6).

6. The outer rotor magnetic steel sheet connecting structure according to claim 5, characterized by: The bearing end cover (6) comprises a bearing part (7), an end cover part (8), a connecting part (9) and a fixing part (10), the end cover part (8) is a circular plate, the bearing part (7) is arranged in the middle of the end cover part (8), the connecting part (9) is annular, one side of the annular connecting part (9) is connected with the end cover part (8), the other side is connected with the fixing part (10), the connecting part (9) is arranged in the wheel rim (5), the fixing part (10) is clamped on the wheel rim (5), and the bearing end cover (6) is fixedly connected with the wheel rim (5).

7. The outer rotor magnetic steel sheet connecting structure according to claim 6, characterized by: The end cover part (8) is provided with a reinforcing rib (11).

8. The outer rotor magnetic steel sheet connecting structure according to claim 6 or 7, characterized by: The mounting ring (2) is welded or connected by interference fit with the bearing end cover (6).

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