A rotor assembly and drive motor

Abstract

This utility model discloses a rotor assembly, relating to the field of motor technology, including a rotor core and a core support. The rotor core is connected to the core support, and the core support is provided with weight-reducing grooves. By reducing the weight of the core support through the weight-reducing grooves, the weight of the core support is reduced, thereby reducing the weight of the entire rotor assembly. This facilitates the connection between the core support and the shaft, allowing the shaft to easily drive the entire rotor assembly to rotate, thus achieving stable operation of the drive motor and improving practicality.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor assembly and a drive motor. Background Technology

[0002] With the popularization of new energy electrification, the demand for electrification in existing commercial and off-road vehicles is increasing, and many commercial and off-road vehicles are gradually developing into pure electric or ultra-electric models. Commercial vehicles or off-road vehicles are mainly used for large-scale operations or heavy-duty applications, so the demand for overall vehicle output performance is increasing, and therefore the motor power required for pure electric or ultra-electric vehicles is also increasing. As the demand for motor power increases, the size of the motor also increases, requiring larger dimensions for the stator and rotor cores, which are formed by stacking stator and rotor laminations, usually stamped using molds. The increasing size of the stator and rotor, especially the overall size of the rotor, requires more material, resulting in a heavier motor.

[0003] For example, CN207218444U, published on April 10, 2018, discloses a rotor assembly comprising: a rotor having an inner bore extending along an axis; a bushing, at least a portion of which is clearance-fitted into the inner bore; a damping element, at least a portion of which is embedded in the gap between the bushing and the rotor, wherein the portion of the damping element embedded in the gap has an interference fit or a clearance fit with the gap; a pressure plate connected to the rotor, wherein the damping element is on the side of the pressure plate facing the rotor; and a rotor shaft passing through the pressure plate, the damping element, and the bushing, and coaxial with the rotor. The rotor assembly disclosed above is relatively heavy and has poor practicality. Summary of the Invention

[0004] The purpose of this invention is to provide a lighter and more practical rotor assembly and drive motor. This invention reduces the weight of the entire rotor assembly by using weight-reducing slots on the iron core support, thereby enabling convenient rotation of the rotor assembly and improving its practicality.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is: a rotor assembly, including a rotor core and a core support, wherein the rotor core is connected to the core support, and the core support is provided with a weight reduction groove.

[0006] The iron core support is provided with a connecting plate, the weight reduction groove is provided on both sides of the connecting plate, and the connecting plate is provided with a rotating shaft mounting hole.

[0007] A key for connecting the shaft is provided on the inner wall of the shaft mounting hole.

[0008] The connecting plate is provided with weight reduction holes.

[0009] The rotor core is provided with magnetic slots.

[0010] The magnet slots are arranged symmetrically in a ring on the rotor core, and adjacent magnet slots are arranged in a V-shape.

[0011] The inner wall of the rotor core is provided with a connecting key, and the outer wall of the core support is provided with a connecting groove that mates with the connecting key.

[0012] The outer wall of the rotor core is provided with welding grooves.

[0013] A dynamic balancing support plate is fitted onto the iron core support. The end of the iron core support is provided with a snap-fit ​​protrusion. The dynamic balancing support plate is provided with a snap-fit ​​groove to accommodate the snap-fit ​​protrusion. The dynamic balancing support plate abuts against one end of the rotor iron core. The other end of the rotor iron core is provided with a fixing plate. The fixing plate is connected to the iron core support by bolts. The fixing plate is provided with a countersunk groove to accommodate bolts. The countersunk groove is provided with a through hole for the bolts to pass through. The iron core support is provided with a threaded hole that mates with the bolts.

[0014] The drive motor uses the rotor assembly described above.

[0015] The beneficial effects of this utility model are:

[0016] The weight of the iron core support is reduced by setting weight-reducing grooves on the iron core support, thereby reducing the weight of the entire rotor assembly. This makes it easier for the iron core support to be connected to the shaft, and the shaft can easily drive the entire rotor assembly to rotate, thus achieving stable operation of the drive motor and making it more practical.

[0017] The connection between the iron core support and the rotating shaft is achieved through the mounting holes of the rotating shaft on the connecting plate. Furthermore, the weight reduction holes are symmetrically arranged in a ring on the connecting plate to further reduce the weight of the entire iron core support, thereby reducing the weight of the entire rotor assembly and drive motor. The rotor iron core and the iron core support can be easily disassembled and assembled through the cooperation of the dynamic balance support plate, the fixing plate and the bolts. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the rotor assembly of this utility model.

[0019] Figure 2 for Figure 1 A schematic diagram of the rotor core structure.

[0020] Figure 3 for Figure 2 A partial structural diagram of part A.

[0021] Figure 4 for Figure 1A schematic diagram of the iron core support structure.

[0022] Figure 5 for Figure 1 A schematic diagram of the fixed plate structure.

[0023] Figure 6 for Figure 1 A schematic diagram of the dynamic balance plate structure.

[0024] In the attached diagram: 1-rotor core, 2-magnet slot, 3-connecting key, 4-welding slot, 5-core support, 501-weight reduction slot, 502-connecting plate, 503-shaft mounting hole, 504-clamping protrusion, 6-connecting groove, 7-shaft connecting key, 8-threaded hole, 9-weight reduction hole, 10-fixing plate, 1001-sinking groove, 11-through hole, 12-dynamic balancing support plate, 1201-clamping groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0027] like Figure 1-6 As shown, a rotor assembly includes a rotor core 1 and a core support 5. The rotor core 1 is connected to the core support 5. The core support 5 is provided with a weight reduction groove 501. Specifically, the core support 5 is cylindrical, and there are two weight reduction grooves 501. The two weight reduction grooves 501 are symmetrically arranged on the core support 5.

[0028] The weight of the iron core support 5 is reduced by the weight reduction groove 501 set on the iron core support 5, thereby reducing the weight of the entire rotor assembly. This makes it easier for the iron core support 5 to be connected to the shaft, and the shaft can easily drive the entire rotor assembly to rotate, thereby achieving stable operation of the drive motor and improving its practicality.

[0029] Reference Figure 1 The iron core support 5 is provided with a connecting plate 502, and weight reduction grooves 501 are provided on both sides of the connecting plate 502. The connecting plate 502 is provided with a shaft mounting hole 503. The shaft is connected to the connecting plate 502 through the shaft mounting hole 503, thereby realizing the stable connection between the iron core support 5 and the shaft. The two weight reduction grooves 501 are symmetrically arranged on both sides of the connecting plate 502 to ensure the balance of the entire rotor assembly. Specifically, the weight reduction grooves 501 are cylindrical.

[0030] The inner wall of the shaft mounting hole 503 is provided with a shaft connecting key 7, and the shaft is provided with a keyway that cooperates with the shaft connecting key 7. The shaft is stably installed in the shaft mounting hole 503 through the shaft connecting key 7.

[0031] The connecting plate 502 is provided with weight reduction holes 9. The weight of the connecting plate 502 is further reduced through the weight reduction holes 9, thereby reducing the weight of the iron core support 5 and the rotor assembly, which facilitates the reduction of the weight of the entire drive motor. In this embodiment, the weight reduction holes 9 are arranged symmetrically in a ring around the shaft mounting hole 503, and there are eight weight reduction holes 9. The cross-section of the weight reduction holes 9 is rectangular.

[0032] Reference Figure 2 and 3 The rotor core 1 is provided with magnet slots 2. The magnet slots 2 are used for the installation of magnets. The number of magnet slot pairs is determined by the number of pole pairs of the motor.

[0033] The magnet slots 2 are arranged symmetrically in a ring on the rotor core 1, and the adjacent magnet slots 2 are arranged in a V-shape, so as to ensure that the magnets installed in the magnet slots 2 are evenly distributed on the rotor core 1, thereby making the dynamic balance of the rotor assembly better.

[0034] The inner wall of the rotor core 1 is provided with a connecting key 3, and the outer wall of the core support 5 is provided with a connecting groove 6 that mates with the connecting key 3. The mate between the connecting key 3 and the connecting groove 6 ensures the stable connection of the rotor core 1 on the core support 5 and prevents the rotor core 1 from rotating after it is installed on the core support 5. In this embodiment, there are two connecting keys 3 and two corresponding connecting grooves 6 on the core support 5. The cross-sections of the connecting key 3 and the connecting groove 6 are rectangular.

[0035] The outer wall of the rotor core 1 is provided with a welding groove 4, which facilitates the welding work after different rotor cores 1 are nested together.

[0036] A dynamic balancing support plate 12 is fitted onto the core support 5. The end of the core support 5 is provided with a snap-fit ​​protrusion 504. The dynamic balancing support plate 12 is provided with a snap-fit ​​groove 1201 to accommodate the snap-fit ​​protrusion 504. The dynamic balancing support plate 12 abuts against one end of the rotor core 1. The other end of the rotor core 1 is provided with a fixing plate 10. The fixing plate 10 is connected to the core support 5 by bolts. The fixing plate 10 is provided with a countersunk groove 1001 to accommodate bolts. The countersunk groove 1001 is provided with a through hole 11 for the bolts to pass through. The core support 5 is provided with a threaded hole 8 to cooperate with the bolts. The rotor core 1 and the core support 5 can be easily disassembled and assembled through the mutual cooperation of the dynamic balancing support plate 12, the fixing plate 10 and the bolts. In this embodiment, there are eight bolts. There are eight through holes 1 symmetrically arranged in a ring on the fixing plate 10 and eight threaded holes 8 symmetrically arranged in a ring on the core support 5.

[0037] During rotor assembly, the magnets are inserted into the magnet slots 2 of the rotor core 1, and the dynamic balancing plate 12 is placed on the core support 2 until the snap-fit ​​groove 1201 on the dynamic balancing plate 12 snaps into the snap-fit ​​protrusion 504 on the core support 5. Then, the connecting protrusion 3 of the rotor core 2 is aligned with the connecting groove 6 on the core support 5, and the rotor core 1 is placed on the core support 5. The fixing plate 10 abuts against the core support 5, and the bolts are passed through the through holes 11 in the countersunk groove 1001 of the fixing plate 10 and connected to the threaded holes 8 on the core support 5, thereby achieving the connection between the fixing plate 10 and the core support 5. With the working cooperation of the fixing plate 10 and the dynamic balancing plate 12, the rotor core 1 is fixed. The entire rotor assembly is convenient and quick, easy to replace and maintain, and has higher practicality.

[0038] The drive motor uses the aforementioned rotor assembly. By reducing the weight of the rotor assembly, the weight of the entire drive motor is reduced, making the drive motor easier and faster to move, more convenient to use, and more practical.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotor assembly, characterized in that, It includes a rotor core (1) and a core support (5), wherein the rotor core (1) is connected to the core support (5), and the core support (5) is provided with a weight reduction groove (501).

2. The rotor assembly according to claim 1, characterized in that, The iron core support (5) is provided with a connecting plate (502), the weight reduction groove (501) is provided on both sides of the connecting plate (502), and the connecting plate (502) is provided with a rotating shaft mounting hole (503).

3. A rotor assembly according to claim 2, characterized in that, The inner wall of the shaft mounting hole (503) is provided with a shaft connection key (7).

4. A rotor assembly according to claim 2, characterized in that, The connecting plate (502) is provided with weight reduction holes (9).

5. A rotor assembly according to claim 2, characterized in that, The rotor core (1) is provided with magnetic slots (2).

6. A rotor assembly according to claim 5, characterized in that, The magnet slots (2) are arranged symmetrically in a ring on the rotor core (1), and adjacent magnet slots (2) are arranged in a V-shape.

7. A rotor assembly according to claim 4, characterized in that, The inner wall of the rotor core (1) is provided with a connecting key (3), and the outer wall of the core support (5) is provided with a connecting groove (6) that cooperates with the connecting key (3).

8. A rotor assembly according to claim 5, characterized in that, The outer wall of the rotor core (1) is provided with a welding groove (4).

9. A rotor assembly according to claim 5, characterized in that, A dynamic balancing support plate (12) is fitted on the iron core support (5). The end of the iron core support (5) is provided with a snap-fit ​​protrusion (504). The dynamic balancing support plate (12) is provided with a snap-fit ​​groove (1201) to accommodate the snap-fit ​​protrusion (504). The dynamic balancing support plate (12) abuts against one end of the rotor iron core (1). The other end of the rotor iron core (1) is provided with a fixing plate (10). The fixing plate (10) is connected to the iron core support (5) by bolts. The fixing plate (10) is provided with a countersunk groove (1001) to accommodate bolts. The countersunk groove (1001) is provided with a through hole (11) for the bolt to pass through. The iron core support (5) is provided with a threaded hole (8) to cooperate with the bolt.

10. A drive motor, characterized in that, Use the rotor assembly according to any one of claims 1-9.

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