A carbon fiber rotor for a motor of a new energy vehicle

Abstract

The utility model provides a motor carbon fibre rotor for new energy automobile, including the front end board and rear end board of installation in transmission shaft, be provided with annular rotor iron core between the front end board with the rear end board, the rotor iron core inlays has the magnetic steel, the front end board with the rear end board are connected through the connecting piece connection. In this motor rotor, the rotor iron core is clamped by the front end board and the rear end board, fixed on the transmission shaft, forms the rotor structure of light weight, reduces the overall weight of the rotor, so that the moment of inertia of the rotor is reduced, the energy consumption required when the motor drives the rotor to rotate is reduced, the motor converts more electric energy into effective mechanical energy, reduces energy waste, thereby significantly improves the operation efficiency of the motor.

Description

Technical Field

[0001] This utility model belongs to the field of motor rotor technology, specifically to a carbon fiber rotor for a motor used in new energy vehicles. Background Technology

[0002] The conventional structure of existing motor rotors involves welding a support cylinder onto the outer circumference of the rotor, with the rotor core fitted onto the support cylinder. The support cylinder is then pressed together at both ends by welded end plates. Because welding is required, the machining process for the rotor shaft is cumbersome, the production cycle is long, and the cost is increased. Furthermore, the rotor shaft is connected to the rotor core via the support cylinder, resulting in a heavy rotor and high energy consumption for driving rotation, which leads to low motor efficiency. Utility Model Content

[0003] To address the problem that existing motors use a support cylinder as a mounting base to connect the rotor to other components, resulting in a heavy rotor, high energy consumption for driving rotation, and low motor efficiency, this invention provides a carbon fiber rotor for motors used in new energy vehicles.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model proposes a carbon fiber rotor for a motor in a new energy vehicle, including a front end plate and a rear end plate mounted on a drive shaft, with an annular rotor core disposed between the front end plate and the rear end plate, and magnets embedded in the rotor core. The front-end board and the back-end board are connected by a connector.

[0005] Preferably, the rotor core includes a plurality of self-riveted stacked rotor laminations, each rotor lamination having a pre-reserved magnet slot, and the magnet is installed in the magnet slot.

[0006] Preferably, the length of the magnet is in the range of 48mm to 52mm, and the width of the magnet is in the range of 5mm to 7mm.

[0007] Preferably, both the front end plate and the rear end plate are carbon fiber plates.

[0008] Preferably, the thickness of the front end plate at the location where it connects to the drive shaft is in the range of 8mm to 12mm.

[0009] Preferably, the thickness of the rear end plate at the location where it connects to the drive shaft is in the range of 8mm to 12mm.

[0010] Preferably, the rear end plate is provided with a weight reduction groove.

[0011] Preferably, the front end plate and the rear end plate are provided with mounting holes, the drive shaft passes through the mounting holes, a retaining ring is provided on the drive shaft at a position that fits against the front end face of the front end plate, and a retaining ring is provided on the drive shaft at a position that fits against the rear end face of the rear end plate; A first keyway is provided on the inner wall of the mounting hole, and a second keyway is provided on the drive shaft at the position corresponding to the first keyway. Keys are installed in the first keyway and the corresponding second keyway.

[0012] Preferably, the connector is a bolt.

[0013] Preferably, the diameter of the drive shaft is in the range of 39mm to 41mm.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model proposes a carbon fiber rotor for a motor in new energy vehicles. The rotor core is clamped by a front end plate and a rear end plate and fixed on the transmission shaft to form a lightweight rotor structure, reducing the overall weight of the rotor and decreasing the moment of inertia of the rotor. As a result, the energy consumption required for the motor to drive the rotor to rotate is reduced, and the motor converts more electrical energy into effective mechanical energy, reducing energy waste and thus significantly improving the operating efficiency of the motor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a carbon fiber rotor for a new energy vehicle motor proposed in this utility model; Figure 2 This is a cross-sectional structural diagram of a carbon fiber rotor for a new energy vehicle motor proposed in this utility model; Figure 3 This is a schematic diagram of another cross-sectional structure of a carbon fiber rotor for a new energy vehicle motor proposed in this utility model; In the attached diagram: 1. Rotor core; 2. Magnet; 3. Connector; 4. Rear end plate; 5. Drive shaft; 6. Front end plate; 7. Snap ring; 8. Magnet slot. Detailed Implementation

[0016] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] This utility model proposes a carbon fiber rotor for a motor used in new energy vehicles, such as... Figures 1-3As shown, the rotor includes a front plate 6 and a rear plate 4 mounted on a drive shaft 5. An annular rotor core 1 is disposed between the front plate 6 and the rear plate 4. Riveting dies are respectively disposed on the end faces of the rotor core 1 opposite to the front plate 6 and the rear plate 4. The riveting dies connect the front plate 6 and the rear plate 4 with rivets, thus firmly fixing the rotor core 1 between the front plate 6 and the rear plate 4. Magnets 2 are embedded in the rotor core 1. The front plate 6 and the rear plate 4 are connected by a connector 3, which is a bolt. Specifically, a stepped hole is provided on the end face of the front plate 6 away from the rear plate 4, and a threaded hole is provided on the rear plate 4 at the position corresponding to the stepped hole. Bolts are inserted into the threaded hole and the corresponding stepped hole, and the front plate 6, the rear plate 4 and the rotor core 1 are fixed together by bolts, which enhances the overall rigidity and structural stability of the rotor. Even under high-speed operation, it can maintain good coaxiality and running stability, and reduce the generation of vibration and noise. In this motor rotor, the rotor core 1 is clamped by the front end plate 6 and the rear end plate 4. The rotor core 1 has a ring structure, which reduces the overall weight of the rotor and reduces the moment of inertia of the rotor. As a result, the energy consumption required for the motor to drive the rotor to rotate is reduced. The motor converts more electrical energy into effective mechanical energy, reduces energy waste, and thus significantly improves the operating efficiency of the motor.

[0022] Preferably, the rotor core 1 includes multiple self-riveted stacked rotor laminations, each lamination having a pre-reserved magnet slot 8. Two magnet slots 8 are arranged as a group, and multiple groups are provided. In each group of magnet slots 8, one end of two magnet slots 8 faces each other, and the included angle between the two sides of one side of the two magnet slots 8 is 120°. Magnets 2 are installed in the magnet slots 8. The length of magnet 2 ranges from 48mm to 52mm, with a preferred length of 50mm. The width of magnet 2 ranges from 5mm to 7mm, with a preferred width of 6mm.

[0023] Preferably, both the front end plate 6 and the rear end plate 4 are made of carbon fiber. The density of carbon fiber is much lower than that of traditional metal plates, which significantly reduces the overall weight of the rotor. With a lighter rotor, the moment of inertia decreases, and the energy consumption required for the motor to drive the rotor is reduced, thus minimizing energy loss during the "driving a heavy rotor" process. The thickness of the front end plate 6 at the location connecting to the drive shaft 5 ranges from 8mm to 12mm, and is preferably 10mm. Similarly, the thickness of the rear end plate 4 at the location connecting to the drive shaft 5 ranges from 8mm to 12mm, and is preferably 10mm.

[0024] like Figure 2 As shown, a weight reduction groove is provided on the rear end plate 4. The weight of the rear end plate 4 is reduced by the weight reduction groove, which further reduces the weight of the rotor, thereby reducing the driving force of the rotor and improving the efficiency of the motor.

[0025] Preferably, mounting holes are provided on the front end plate 6 and the rear end plate 4, and a drive shaft 5 is inserted through the mounting holes. The diameter of the drive shaft is in the range of 39mm to 41mm, preferably 40mm. A retaining ring 7 is provided on the drive shaft 5 at the position that fits against the front end face of the front end plate 6, and a retaining ring is provided on the drive shaft 5 at the position that fits against the rear end face of the rear end plate 4. The cooperation between the retaining ring 7 and the retaining ring can stably connect the rotating shaft 5 to the front end plate 6 and the rear end plate 4, making the rotor structure compact and more stable in use.

[0026] Preferably, a first keyway is provided on the inner wall of the mounting hole, and a second keyway is provided on the drive shaft 5 at the position corresponding to the first keyway, with keys installed in the first keyway and the corresponding second keyway.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model 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 basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] 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 be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A carbon fiber rotor for a motor in new energy vehicles, characterized in that, Includes a front end plate (6) and a rear end plate (4) mounted on a drive shaft (5), with an annular rotor core (1) between the front end plate (6) and the rear end plate (4), and a magnet (2) embedded in the rotor core (1). The front-end board (6) and the rear-end board (4) are connected by a connector (3).

2. The carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, The rotor core (1) includes multiple self-riveted stacked rotor laminations, with pre-reserved magnet slots (8) in the rotor laminations, and the magnets (2) are installed in the magnet slots (8).

3. The carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, The length of the magnet (2) ranges from 48mm to 52mm, and the width of the magnet (2) ranges from 5mm to 7mm.

4. The carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, Both the front end plate (6) and the rear end plate (4) are carbon fiber plates.

5. A carbon fiber rotor for a new energy vehicle motor according to claim 4, characterized in that, The thickness of the front end plate (6) at the location where it connects to the drive shaft (5) ranges from 8mm to 12mm.

6. A carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, The thickness of the rear end plate (4) at the location where it connects to the drive shaft (5) ranges from 8mm to 12mm.

7. A carbon fiber rotor for a new energy vehicle motor according to claim 6, characterized in that, The rear end plate (4) is provided with a weight reduction groove.

8. A carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, Mounting holes are provided on the front end plate (6) and the rear end plate (4), and the drive shaft (5) passes through the mounting holes. A retaining ring (7) is provided on the drive shaft (5) at a position that fits against the front end face of the front end plate (6), and a retaining ring is provided on the drive shaft (5) at a position that fits against the rear end face of the rear end plate (4). A first keyway is provided on the inner wall of the mounting hole, and a second keyway is provided on the drive shaft (5) at the position corresponding to the first keyway. Keys are installed in the first keyway and the corresponding second keyway.

9. A carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, The connector (3) is a bolt.

10. A carbon fiber rotor for a new energy vehicle motor according to claim 1, characterized in that, The diameter of the drive shaft ranges from 39mm to 41mm.

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