A dual stator electric machine

Abstract

The utility model provides a kind of double-stator motor belongs to motor technical field.It solves the problem of insufficient assembly accuracy and inconvenient disassembly in prior art.The utility model includes motor shell, outer stator, inner stator, magnetic rotor, rotor connecting cylinder, driving shaft, planetary gear assembly and rotor copper ring assembly, outer stator is annular, and outer stator outer periphery is formed with connecting convex body, and outer stator both sides are fixedly connected with side connector, and a plurality of heat dissipation openings are formed in side connector, and magnetic rotor is two-side split type structure and includes left rotor and right rotor, and magnetic tooth is formed in left rotor and right rotor, and magnetic tooth of left rotor and right rotor is alternately arranged, and connecting groove is formed in the both sides of magnetic rotor, and connecting convex body is formed in the both sides of rotor connecting cylinder, and connecting convex body is arranged and protrudes connecting groove, and inner stator is installed in the inner side end of rotor connecting cylinder.The utility model has the advantages of high assembly accuracy, simple assembly and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology and relates to a dual-stator motor. Background Technology

[0002] Compared to single-stator motors, dual-stator motors have higher power density and greater torque in the same volume, and are widely used in scenarios with high power performance requirements.

[0003] Chinese patent publication number CN218387033U discloses a dual-stator motor, including a motor body, a drive shaft running through the entire motor body, and fixing ribs arranged on the side wall of the motor body. Several fixing ribs are arranged in an array on the side wall of the motor body, and heat dissipation grooves are formed between adjacent fixing ribs. The motor body also includes a bracket connected to the fixing ribs, with the ends of the fixing ribs connected to the bracket. A front end cover is provided on the motor body. The ends of the fixing ribs are connected to the front end cover. The front end cover is arranged parallel to the bracket. The fixing ribs are bolted or riveted to the bracket. A connecting bearing is provided between the bracket and the drive shaft. Three sets of fixing ribs are arranged in an array on the side wall of the motor body.

[0004] In the dual-stator motor provided by this patent, the first patent uses components such as fixing ribs, brackets, and front end covers to achieve motor support, heat dissipation, and connection. The overall structure is relatively traditional and scattered, making it difficult to assemble and disassemble and maintain precision. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a dual-stator motor.

[0006] The objective of this utility model can be achieved through the following technical solution: A dual-stator motor includes a motor housing, an outer stator, an inner stator, a magnetic rotor, a rotor connecting cylinder, a drive shaft, a planetary gear assembly, and a rotor copper ring assembly. The motor housing is a split structure, with the outer stator, inner stator, and magnetic rotor disposed inside the motor housing. The outer stator is annular, with a fixed protrusion formed on its outer periphery. Side connectors are fixedly connected to both sides of the outer stator, and several heat dissipation vents are provided in the side connectors. The magnetic rotor is a split structure with two sides, including a left rotor and a right rotor. Magnetic teeth are formed in the left and right rotors, and the magnetic teeth of the left and right rotors are alternately arranged. Connecting grooves are provided on both sides of the magnetic rotor. Connecting protrusions are formed on both sides of the rotor connecting cylinder, and the connecting protrusions pass through and extend out of the connecting grooves. The inner stator is installed on the inner end of the rotor connecting cylinder. A shaft seat is formed at the outer end of the side connectors. The drive shaft passes through the shaft seat and is located inside the inner stator.

[0007] In the aforementioned dual-stator motor, the planetary gear assembly includes a front housing, a middle housing, a rear housing, planetary gears, an internal gear ring, an output shaft, and a coupling frame. The front housing and the rear housing are fixedly connected to both sides of the middle housing. The internal gear ring is installed inside the middle housing. The planetary gears mesh with the internal gear ring. A sun gear is formed in the middle section of the output shaft. The sun gear meshes with the planetary gears. The coupling frame is fixedly connected to one side of the internal gear ring and is located inside the rear housing. A flange is formed at the end of the rear housing and is fixedly connected to the end of the motor housing.

[0008] In the aforementioned dual-stator motor, a limiting groove is formed at the point where the connecting protrusion extends out of the connecting groove, and a rotor segment is fixedly connected in the limiting groove. The rotor segment is in contact with the outer end faces of the left and right rotors.

[0009] In the aforementioned dual-stator motor, the rotor connecting cylinder has an installation groove, and a magnet is provided in the installation groove. The two ends of the magnet are respectively engaged with the magnetic teeth of the inner stator and the magnetic rotor.

[0010] In the aforementioned dual-stator motor, a spline groove is provided on the inner end of the output shaft, and a spline shaft head is formed at the end of the drive shaft. The spline shaft head extends into the spline groove and is fixedly connected, and the drive shaft is connected to the output shaft.

[0011] In the aforementioned dual-stator motor, a protective cover is formed on one side of the motor housing, and the rotor copper ring assembly is installed inside the protective cover.

[0012] In the aforementioned dual-stator motor, a connecting disk is fixedly connected to one side of the magnetic rotor, and a rotor shaft is formed at the center of the connecting disk. The rotor shaft passes through the interior of the rotor copper ring assembly and is connected to the rotor copper ring assembly.

[0013] Compared with the prior art, the dual-stator motor provided by this utility model has the following advantages: 1. The rigid positioning structure of the connecting slots on both sides of the magnetic rotor and the connecting protrusions of the rotor connecting cylinder can strictly limit the circumferential and axial displacement of the left and right rotors, ensuring the coaxiality and relative position accuracy of the magnetic rotors; 2. During assembly, simply align the connecting slots of the left and right rotors with the connecting protrusions of the rotor connecting cylinder and fix them in place to complete the rapid positioning and installation of the rotor assembly without complicated calibration procedures. During maintenance, the left and right rotors can be easily disassembled by separating the connecting protrusions and connecting slots, facilitating individual inspection or replacement of components, and greatly reducing the difficulty of disassembly and assembly and maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the magnetic rotor and the rotor connecting cylinder; Figure 4 This is a schematic diagram of the exploded structure of a planetary assembly.

[0015] In the diagram: 1. Motor housing; 11. Protective cover; 2. Outer stator; 21. Fixing protrusion; 22. Side connector; 221. Heat dissipation vent; 222. Shaft seat; 3. Inner stator; 4. Magnetic rotor; 41. Left rotor; 42. Right rotor; 43. Magnetic teeth; 44. Connecting groove; 45. Rotor section; 5. Rotor connecting cylinder; 51. Connecting protrusion; 511. Limiting groove; 52. Mounting groove; 53. Magnet; 6. Drive shaft; 61. Splined shaft head; 7. Planetary gear assembly; 71. Front housing; 72. Middle housing; 73. Rear housing; 731. Flange; 74. Planetary gear; 75. Internal gear ring; 76. Output shaft; 761. Sun gear; 762. Splined groove; 77. Coupling frame; 8. Rotor copper ring assembly; 9. Connecting disc; 91. Rotor shaft. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 4 As shown, this embodiment includes a motor housing 1, an outer stator 2, an inner stator 3, a magnetic rotor 4, a rotor connecting cylinder 5, a drive shaft 6, a planetary gear assembly 7, and a rotor copper ring assembly 8. The motor housing 1 adopts a split structure design, integrating the outer stator 2, the inner stator 3, and the magnetic rotor 4 inside it to form a compact overall structure.

[0018] like Figures 1 to 4 As shown, the outer stator 2 has a ring-shaped structure with multiple fixed protrusions 21 evenly formed on its outer periphery. Side connectors 22 are fixedly connected to the fixed protrusions 21 on both sides of the outer stator 2 by bolts. Several heat dissipation holes 221 are evenly opened on the side connectors 22, which can effectively improve the heat dissipation efficiency of the motor during operation. The outer end of the side connectors 22 is integrally formed with a shaft seat 222, which provides stable support for the drive shaft 6.

[0019] like Figures 1 to 4As shown, the magnetic rotor 4 adopts a split structure on both sides, including a left rotor 41 and a right rotor 42. Magnetic teeth 43 are formed on the circumferential surface of both the left rotor 41 and the right rotor 42, and the magnetic teeth 43 of the left rotor 41 and the right rotor 42 are arranged alternately to optimize the magnetic field distribution. Connecting grooves 44 are symmetrically opened on both sides of the magnetic rotor 4, and connecting protrusions 51 are correspondingly formed on both sides of the rotor connecting cylinder 5. The connecting protrusions 51 pass through and extend out of the connecting grooves 44 to realize a stable connection between the magnetic rotor 4 and the rotor connecting cylinder 5. A limiting groove 511 is formed on the part of the connecting protrusion 51 that extends out of the connecting groove 44. A rotor section 45 is fixedly connected in the limiting groove 511. The rotor section 45 is closely fitted with the outer end faces of the left rotor 41 and the right rotor 42 to further improve the connection stability. An installation groove 52 is formed on the inner side of the rotor connecting cylinder 5. A magnet 53 is set inside the installation groove 52. The two ends of the magnet 53 are respectively fitted with the magnetic teeth 43 of the inner stator 3 and the magnetic rotor 4 to enhance the magnetic coupling effect. The inner stator 3 is fixedly installed on the inner end of the rotor connecting cylinder 5 to form a double stator structure with the magnetic rotor 4, thereby improving the output efficiency of this embodiment.

[0020] To elaborate further, such as Figures 1 to 4 As shown, the planetary gear assembly 7 includes a front housing 71, an intermediate housing 72, a rear housing 73, a planetary gear 74, an internal gear ring 75, an output shaft 76, and a coupling frame 77. The front housing 71 and the rear housing 73 are fixedly connected to both sides of the intermediate housing 72 by bolts to form a closed transmission space. The internal gear ring 75 is fixedly installed inside the intermediate housing 72. The planetary gear 74 meshes with the internal gear ring 75. The output shaft 76 has a sun gear 761 integrally formed in the middle section. The sun gear 761 meshes with the planetary gear 74. The coupling frame 77 is fixedly connected to one side of the internal gear ring 75 and is located inside the rear housing 73. A flange 731 is formed at the end of the rear housing 73. The flange 731 is fixedly connected to the end of the motor housing 1 to achieve a reliable connection between the planetary gear assembly 7 and the motor body.

[0021] To elaborate further, such as Figures 1 to 4 As shown, a spline groove 762 is provided on the inner end of the output shaft 76, and a spline shaft head 61 is correspondingly formed at the end of the drive shaft 6. The spline shaft head 61 extends into the spline groove 762 and is fixedly connected by an interference fit, so that the drive shaft 6 and the output shaft 76 can transmit power. The drive shaft 6 passes through the shaft seat 222 and is located inside the inner stator 3 to ensure the concentricity of the transmission.

[0022] To elaborate further, such as Figures 1 to 4 As shown, a protective cover 11 is integrally formed on one side of the motor housing 1. The rotor copper ring assembly 8 is installed inside the protective cover 11 and is effectively protected. A connecting plate 9 is fixedly connected to one side of the magnetic rotor 4. A rotor shaft 91 is formed at the center of the connecting plate 9. The rotor shaft 91 passes through the inside of the rotor copper ring assembly 8 and is connected to it to realize the conduction of the rotor circuit.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0024] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A dual-stator motor, comprising a motor housing (1), an outer stator (2), an inner stator (3), a magnetic rotor (4), a rotor connecting cylinder (5), a drive shaft (6), a planetary gear assembly (7), and a rotor copper ring assembly (8), characterized in that: The motor housing (1) is a split structure, and the outer stator (2), inner stator (3), and magnetic rotor (4) are disposed inside the motor housing (1). The outer stator (2) is annular, and a fixed protrusion (21) is formed on the outer periphery of the outer stator (2). Side connectors (22) are fixedly connected to both sides of the outer stator (2), and several heat dissipation vents (221) are provided in the side connectors (22). The magnetic rotor (4) is a split structure with two sides and includes a left rotor (41) and a right rotor (42). The left rotor (41) and the right rotor (42) are... 2) Magnetic teeth (43) are formed in the middle. The magnetic teeth (43) of the left rotor (41) and the right rotor (42) are alternately arranged. The magnetic rotor (4) has connecting grooves (44) on both sides. The rotor connecting cylinder (5) has connecting protrusions (51) on both sides. The connecting protrusions (51) pass through and extend out of the connecting grooves (44). The inner stator (3) is installed on the inner end of the rotor connecting cylinder (5). The outer end of the side connector (22) has a bearing seat (222). The drive shaft (6) passes through the bearing seat (222) and is located inside the inner stator (3).

2. A dual-stator motor according to claim 1, characterized in that: The planetary gear assembly (7) includes a front housing (71), a middle housing (72), a rear housing (73), a planetary gear (74), an internal gear ring (75), an output shaft (76), and a coupling frame (77). The front housing (71) and the rear housing (73) are fixedly connected to both sides of the middle housing (72). The internal gear ring (75) is installed inside the middle housing (72). The planetary gear (74) meshes with the internal gear ring (75). A sun gear (761) is formed in the middle section of the output shaft (76). The sun gear (761) meshes with the planetary gear (74). The coupling frame (77) is fixedly connected to one side of the internal gear ring (75) and is located inside the rear housing (73). A flange (731) is formed at the end of the rear housing (73) and is fixedly connected to the end of the motor housing (1).

3. A dual-stator motor according to claim 1, characterized in that: The connecting protrusion (51) extends out of the connecting groove (44) and a limiting groove (511) is provided. A rotor segment (45) is fixedly connected in the limiting groove (511). The rotor segment (45) is in contact with the outer end face of the left rotor (41) and the right rotor (42).

4. A dual-stator motor according to claim 1, characterized in that: The rotor connecting cylinder (5) has an installation groove (52) and a magnet (53) is provided in the installation groove (52). The two ends of the magnet (53) are respectively attached to the magnetic teeth (43) of the inner stator (3) and the magnetic rotor (4).

5. A dual-stator motor according to claim 2, characterized in that: The output shaft (76) has a spline groove (762) on its inner end, and the drive shaft (6) has a spline head (61) at its end. The spline head (61) extends into the spline groove (762) and is fixedly connected. The drive shaft (6) is connected to the output shaft (76).

6. A dual-stator motor according to claim 1, characterized in that: A protective cover (11) is formed on one side of the motor housing (1), and the rotor copper ring assembly (8) is installed inside the protective cover (11).

7. A dual-stator motor according to claim 1, characterized in that: A connecting disk (9) is fixedly connected to one side of the magnetic rotor (4). A rotor shaft (91) is formed at the center of the connecting disk (9). The rotor shaft (91) passes through the inside of the rotor copper ring assembly (8) and is connected to the rotor copper ring assembly (8).

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