An enhanced motor outer rotor

Abstract

The utility model discloses a reinforced motor outer rotor, including the injection molding of outer rotor casing, the center area of outer rotor casing is inlayed with reinforced metal insert piece, wherein, reinforced metal insert piece includes the connecting ring in the center, the inner reinforcing ring of interval location in the connecting hole outer periphery and the outer reinforcing ring of interval location in the inner reinforcing ring outer periphery, and connecting ring, inner reinforcing ring and outer reinforcing ring are connected through a plurality of the connecting rib of the circumferential interval distribution, connecting ring is fixed with motor shaft connection, the utility model discloses a simple structure design has obviously strengthened the structural strength of motor outer rotor, even when motor shaft drives outer rotor casing to carry out high -speed rotation, can provide stable structure support, and then has expanded the application range of motor outer rotor.

Description

Technical Field

[0001] This utility model belongs to the field of motor structure, specifically relating to an enhanced external rotor for a motor. Background Technology

[0002] With the widespread application of external rotor direct drive motors, the manufacturing performance of external rotor motors is receiving increasing attention. In order to reduce the weight of the external rotor housing and reduce material costs, existing technologies typically use injection-molded rotor housings. Obviously, this reduces the installation strength to some extent, making it difficult to apply in high-speed motor drive applications.

[0003] Therefore, the applicant seeks technical solutions to improve the aforementioned technical problems. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to propose an enhanced motor outer rotor, which significantly enhances the structural strength of the motor outer rotor through a simple structural design. Even when the motor shaft drives the outer rotor housing to rotate at high speed, it can provide stable structural support, thereby expanding the application range of the motor outer rotor.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] An enhanced motor outer rotor includes an injection-molded outer rotor housing, the central region of which is fitted with a reinforcing metal insert; wherein, the reinforcing metal insert includes a central connecting ring, an inner reinforcing ring spaced around the outer periphery of a connecting hole, and an outer reinforcing ring spaced around the outer periphery of the inner reinforcing ring, the connecting ring, the inner reinforcing ring, and the outer reinforcing ring being connected by a plurality of circumferentially spaced connecting ribs; the connecting ring is fixedly connected to the motor shaft.

[0007] Preferably, the inner circumference of the connecting ring is provided with a connecting spline, which is used to fix the connection to the motor shaft.

[0008] Preferably, the axial length of the connecting ring is greater than the axial length of the inner reinforcing ring, and the axial length of the inner reinforcing ring is greater than the axial length of the outer reinforcing ring.

[0009] Preferably, the connecting ring extends axially forward and backward relative to the inner reinforcing ring.

[0010] Preferably, the connecting rib is inclined.

[0011] Preferably, the number of connecting ribs is 5-10.

[0012] Preferably, the reinforcing metal insert is a one-piece cast aluminum part.

[0013] Preferably, the outer rotor housing includes a housing chassis and a housing sidewall that extends integrally upward relative to the outer periphery of the housing chassis; wherein, the reinforcing metal insert is embedded in the central region of the housing chassis; the housing chassis is further provided with a plurality of reinforcing ribs located on the outer periphery of the reinforcing metal insert and distributed circumferentially, and the reinforcing ribs are connected to the outer reinforcing ring.

[0014] Preferably, the housing chassis is further provided with a plurality of heat dissipation holes distributed circumferentially at intervals on the outer periphery of the reinforcing ribs.

[0015] Preferably, a rotor yoke is fixedly provided on the inner circumference of the sidewall of the housing, and a plurality of permanent magnets evenly spaced are fixedly provided on the inner circumference of the rotor yoke.

[0016] This invention proposes a structure for embedding a reinforcing metal insert in the central region of an injection-molded outer rotor housing. The reinforcing metal insert consists of a central connecting ring, an inner reinforcing ring spaced around the connecting hole, and an outer reinforcing ring spaced around the inner reinforcing ring. The connecting ring, inner reinforcing ring, and outer reinforcing ring are connected as a whole by connecting ribs. The structure uses the connecting ring as a fixed connection for the motor shaft. Through a simple structural design, the structural strength of the motor outer rotor is significantly enhanced. Even when the motor shaft drives the outer rotor housing to rotate at high speed, it can provide stable structural support, thereby expanding the application range of the motor outer rotor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the enhanced motor outer rotor according to a specific embodiment of this application;

[0018] Figure 2 yes Figure 1 Top view;

[0019] Figure 3 yes Figure 2 Sectional view in the BB direction;

[0020] Figure 4 yes Figure 1 A schematic diagram of the decomposed structure;

[0021] Figure 5 This is a schematic diagram of the structure of the reinforced metal insert according to a specific embodiment of this application;

[0022] Figure 6 yes Figure 5 Top view;

[0023] Figure 7 yes Figure 5 Side view. Detailed Implementation

[0024] This utility model discloses an enhanced motor outer rotor, including an injection-molded outer rotor housing, with a reinforcing metal insert embedded in the central region of the outer rotor housing; wherein, the reinforcing metal insert includes a connecting ring located at the center, an inner reinforcing ring spaced around the outer periphery of the connecting hole, and an outer reinforcing ring spaced around the outer periphery of the inner reinforcing ring, the connecting ring, the inner reinforcing ring, and the outer reinforcing ring being connected by a plurality of circumferentially spaced connecting ribs; the connecting ring is fixedly connected to the motor shaft.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an enhanced motor outer rotor includes an injection-molded outer rotor housing 1, with a reinforcing metal insert 2 embedded in the central region of the outer rotor housing 1; further details can be found in the attached diagram. Figure 5 , Figure 6 and Figure 7 As shown, the reinforcing metal insert 2 includes a connecting ring 21 located at the center, an inner reinforcing ring 22 spaced around the outer periphery of the connecting hole 21, and an outer reinforcing ring 23 spaced around the outer periphery of the inner reinforcing ring 22. The connecting ring 21, the inner reinforcing ring 22, and the outer reinforcing ring 24 are connected by a plurality of circumferentially spaced connecting ribs 24. The connecting ring 21 is fixedly connected to the motor shaft (a known structure, not shown in the figure). Preferably, in order to achieve a high-strength torque transmission connection, in this embodiment, the inner periphery of the connecting ring 21 is provided with a connecting spline 21a, and the connecting spline 21a is used to fix the connection to the motor shaft.

[0027] Preferably, to further enhance the structural reinforcement effect, in this embodiment, the axial length of the connecting ring 21 is greater than the axial length of the inner reinforcing ring 22, and the axial length of the inner reinforcing ring 22 is greater than the axial length of the outer reinforcing ring 23; more preferably, in this embodiment, the connecting ring 21 protrudes forward and backward relative to the inner reinforcing ring 22 in the axial direction; specifically preferably, in this embodiment, the connecting rib 24 is inclined, which can further improve the bonding force between the reinforcing metal insert 2 and the injection molded body of the outer rotor housing during injection molding;

[0028] Preferably, in this embodiment, the number of connecting ribs 24 is 5-10; more preferably, in this embodiment, the number of connecting ribs 24 is 8, and each connecting rib 24 is evenly spaced in the circumferential direction.

[0029] Preferably, in order to further improve the bonding force between the reinforcing metal insert 2 and the injection molding body of the outer rotor housing during injection molding, in this embodiment, the reinforcing metal insert 2 is an integral cast aluminum part.

[0030] Preferably, in this embodiment, the outer rotor housing 1 includes a housing base 1a and a housing sidewall 1b extending integrally upward relative to the outer periphery of the housing base 1a; preferably, in this embodiment, a rotor yoke 3 is fixedly provided on the inner periphery of the housing sidewall 1b, and a plurality of permanent magnets 4 are fixedly provided on the inner periphery of the rotor yoke 3 in a uniformly spaced manner.

[0031] In this embodiment, the reinforcing metal insert 2 is embedded in the central region of the housing chassis 1a; the housing chassis 1a is also provided with a plurality of reinforcing ribs 5 located on the outer periphery of the reinforcing metal insert 2 and distributed circumferentially, and the reinforcing ribs 5 are connected to the outer reinforcing ring 23; more preferably, in this embodiment, the housing chassis 1a is also provided with a plurality of heat dissipation holes 6 located on the outer periphery of the reinforcing ribs 5 and distributed circumferentially, so as to achieve the heat dissipation effect on the outer rotor of the motor on the basis of achieving the structural reinforcement effect.

[0032] This embodiment proposes a structure in which a reinforcing metal insert 2 is embedded in the central region of the injection-molded outer rotor housing 1. The reinforcing metal insert 2 consists of a connecting ring 21 located at the center, an inner reinforcing ring 22 spaced around the outer periphery of the connecting hole 21, and an outer reinforcing ring 23 spaced around the outer periphery of the inner reinforcing ring 21. The connecting ring 21, the inner reinforcing ring 22, and the outer reinforcing ring 23 are connected as a whole by connecting ribs 24. The structure of using the connecting ring 21 as a fixed connection for the motor shaft significantly enhances the structural strength of the motor outer rotor through a simple structural design. Even when the motor shaft drives the outer rotor housing 1 to rotate at high speed, it provides stable structural strength and expands the application range of the motor outer rotor.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An enhanced external rotor for a motor, characterized in that, The device includes an injection-molded outer rotor housing, the central region of which is fitted with a reinforcing metal insert; wherein the reinforcing metal insert includes a central connecting ring, an inner reinforcing ring spaced around the outer periphery of a connecting hole, and an outer reinforcing ring spaced around the outer periphery of the inner reinforcing ring, the connecting ring, the inner reinforcing ring, and the outer reinforcing ring being connected by a plurality of circumferentially spaced connecting ribs; the connecting ring is fixedly connected to the motor shaft.

2. The enhanced motor external rotor according to claim 1, characterized in that, The inner circumference of the connecting ring is provided with a connecting spline, which is used to fix the connection to the motor shaft.

3. The enhanced motor external rotor according to claim 1, characterized in that, The axial length of the connecting ring is greater than the axial length of the inner reinforcing ring, and the axial length of the inner reinforcing ring is greater than the axial length of the outer reinforcing ring.

4. The enhanced motor external rotor according to claim 3, characterized in that, The connecting ring extends axially forward and backward relative to the inner reinforcing ring.

5. The enhanced motor external rotor according to claim 1, characterized in that, The connecting ribs are beveled.

6. The enhanced motor external rotor according to claim 1, characterized in that, The number of connecting ribs is 5-10.

7. The enhanced motor external rotor according to claim 1, characterized in that, The reinforcing metal insert is made of a single piece of cast aluminum.

8. The enhanced motor external rotor according to claim 1, characterized in that, The outer rotor housing includes a housing chassis and a housing sidewall that extends integrally upward relative to the outer periphery of the housing chassis; wherein, the reinforcing metal insert is embedded in the central region of the housing chassis; the housing chassis is also provided with a plurality of reinforcing ribs located on the outer periphery of the reinforcing metal insert and distributed circumferentially, and the reinforcing ribs are connected to the outer reinforcing ring.

9. The enhanced motor external rotor according to claim 8, characterized in that, The housing chassis is also provided with a number of heat dissipation holes that are circumferentially spaced around the outer periphery of the reinforcing ribs.

10. The enhanced external rotor of the motor according to claim 8, characterized in that, A rotor yoke is fixedly provided on the inner circumference of the sidewall of the housing, and a number of permanent magnets are fixedly provided on the inner circumference of the rotor yoke in a uniformly spaced manner.

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