Motor, electric drive assembly and vehicle

Abstract

The application provides an electric machine, an electric drive assembly and a vehicle. The electric machine comprises a shell, a rotor, a conductive part and a protective part. The rotor comprises a rotating shaft. The protective part is sleeved on the rotating shaft and electrically connected with the rotating shaft. The conductive part is fixed to the shell. In the radial direction of the rotating shaft, the conductive part is arranged on the side of the protective part away from the rotating shaft. In the radial direction, one side of the conductive part is in abutment with the protective part and electrically connected with the protective part, and the other side of the conductive part is in abutment with the shell and electrically connected with the shell. The electric machine provided by the application can conduct the current of the rotating shaft to the shell through the conductive part, reduce the current size passing through the bearing, avoid the electric erosion of the bearing, and prolong the service life of the electric machine. At the same time, the protective part is arranged to avoid the damage of the conductive part by the rotating shaft during rotation, and further prolong the service life of the electric machine.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an electric motor, an electric drive assembly, and a vehicle. Background Technology

[0002] An electric motor is a core device that converts electrical energy into mechanical energy and is widely used in industry, transportation, and other fields. An electric motor typically consists of a housing, a stator, and a rotor. The stator is fixed to the housing and has coils wound around it to generate a magnetic field. The rotor includes a shaft and a rotor core. During the rotor's rotation, the shaft experiences electromagnetic induction, generating a shaft current. Currently, this shaft current is generally transmitted to bearings for release. However, this process can cause electrical erosion in the bearings, reducing the overall lifespan of the motor. Utility Model Content

[0003] This application provides an electric motor, an electric drive assembly, and a vehicle to solve related technical problems.

[0004] This application discloses an electric motor, comprising a housing, a rotor, a conductive element, and a protective element; the rotor includes a rotating shaft, and the protective element is sleeved on the rotating shaft and electrically connected to the rotating shaft; the conductive element is fixed to the housing; in the radial direction of the rotating shaft, the conductive element is located on the side of the protective element opposite to the rotating shaft and is aligned with the protective element; in the radial direction, one side of the conductive element abuts against the protective element and is electrically connected, and the other side of the conductive element abuts against and is fixed to the housing and is electrically connected.

[0005] The motor described in this application incorporates conductive components to conduct the current from the shaft to the housing, reducing the current flowing through the bearings, preventing electrical erosion, and extending the motor's service life. Simultaneously, protective components prevent damage to the conductive components during shaft rotation, further extending the motor's lifespan.

[0006] Furthermore, the conductive element includes a base and a contact portion. One side of the base abuts against the housing, and the contact portion extends from the side of the base away from the housing to abut against the protective element. Because the base has a large volume, the contact area between the conductive element and the housing is ensured, improving both the installation strength of the conductive element and the conductivity, thus comprehensively improving the durability of the motor.

[0007] Furthermore, along the radial direction, the contact portion has the same thickness in the axial direction of the rotor. This uniform thickness design of the contact portion ensures the uniformity of internal stress, improves mechanical strength, and further enhances the durability of the motor.

[0008] Furthermore, the contact portion is arranged in a continuous ring shape. This arrangement increases the contact area between the conductive component and the protective component, thereby increasing current transmission efficiency and further reducing the risk of electrical erosion of the bearing.

[0009] Furthermore, the conductive component is integrally formed. This design increases the structural strength of the conductive component, further extending the service life of the motor.

[0010] Furthermore, it also includes a first bearing and a second bearing, which are sleeved on the rotating shaft and spaced apart in the axial direction of the rotating shaft; the conductive element and the protective element are located between the first bearing and the second bearing. By placing the conductive element and the protective element between the first bearing and the second bearing, the layout compactness is improved, thereby reducing the size of the motor, expanding the application scenarios of the motor, and improving the versatility of the motor.

[0011] Furthermore, the rotating shaft includes an extension section and a mounting section arranged along the axial direction; the rotating shaft is provided with a mounting groove for mounting the rotor core; the mounting groove passes through the extension section and the mounting section along the axial direction; the protective member is disposed on the extension section and covers at least a portion of the mounting groove. By providing a mounting groove for mounting the rotor core, the installation efficiency of the rotor core is improved. At the same time, using the protective member to cover the mounting groove prevents the mounting groove from damaging the conductive components.

[0012] Furthermore, in the axial direction of the rotor, the conductive element is located between the two ends of the protective element. The conductive element can fully contact the protective element, increasing the contact area between them, further improving current transmission efficiency, and reducing the risk of electrical erosion of the bearing.

[0013] A second aspect of this application provides an electric drive assembly, including the aforementioned motor. Because the motor of this application has a long lifespan, the electric drive assembly of this application has good durability.

[0014] A third aspect of this application discloses a vehicle comprising the aforementioned electric drive assembly. Due to the superior durability of the electric drive assembly, the reliability of the vehicle is improved.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0017] Figure 1This is a structural diagram of an electric drive assembly according to an exemplary embodiment of this application;

[0018] Figure 2 yes Figure 1 A cross-sectional view of the motor.

[0019] Figure 3 yes Figure 2 Structural diagram of the transfer shaft;

[0020] Figure 4 yes Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 5 yes Figure 2 Structural diagram of the conductive component.

[0022] Reference numerals in the attached figures: Motor 1; Reducer 2; Second gear-201; Housing 10; First end plate 11; Second end plate 12; First mounting groove 13; Second mounting groove 14; Mounting protrusion 15; Rotor 20; Shaft 21; Extension section 211; Mounting section 212; Mounting groove 213; Expansion port 2130; First assembly section 214; Second assembly section 215; Extended section 216; First gear 217; Rotor core 22; Stator 30; Stator core 31; Coil 32; Conductive component 40; Base 41; Contact part 42; Protective component 50; First bearing 60; Second bearing 70. Detailed Implementation

[0023] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0024] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0025] During the rotation of the motor rotor, shaft current is generated on the shaft. This shaft current is transmitted to the bearings, causing bearing corrosion and reducing the service life of the motor. This application provides a motor, electric drive assembly, and vehicle to solve the related technical problems.

[0026] like Figure 1 As shown, this application provides an electric drive assembly, which includes a motor 1 and a reducer 2. Please refer to the following: Figure 2 As shown, the motor 1 includes a housing 10, a rotor 20, a stator 30, a conductive component 40, a protective component 50, a first bearing 60, and a second bearing 70. The motor 1 and the reducer 2 share the housing 10.

[0027] The rotor 20 includes a shaft 21 and a rotor core 22. The shaft 21 is hollow and allows for the flow of cooling liquid. A protective element 50 is fitted onto the shaft 21 and is electrically connected to it. A conductive element 40 is fixed to the housing 10. In the radial direction of the shaft 21, the conductive element 40 is located on the side of the protective element 50 opposite to the shaft 21 and is aligned with the protective element 50.

[0028] In the radial direction of the rotating shaft 21, one side of the conductive element 40 abuts against the protective element 50 and is electrically connected, while the other side of the conductive element 40 abuts against the housing 10 and is electrically connected.

[0029] The motor 1 of this application, by incorporating a conductive element 40, conducts the current from the rotating shaft 21 to the housing 10, reducing the current passing through the bearings, preventing electrical erosion of the bearings, and extending the service life of the motor 1. Simultaneously, by incorporating a protective element 50, damage to the conductive element 40 is prevented from occurring during rotation of the rotating shaft 21, further extending the service life of the motor 1. Due to the long service life of the motor 1 of this application, the electric drive assembly of this application exhibits good durability.

[0030] Specifically, since one side of the conductive element 40 is fixed to the housing 10 and the other side is fixed to the protective element 50, the conductive element 40 is in the form of a support arm with one end fixed and the other end movable. The force exerted on the conductive element 40 by the rotating shaft 21 is applied to the conductive element 40 in the form of a bending moment. After the protective element 50 is installed, the size of the conductive element 40 is reduced in the radial direction of the rotor 20, which reduces the bending moment on the conductive element 40 and reduces the risk of breakage.

[0031] In the axial direction of the rotor 20, the conductive element 40 is located between the two ends of the protective element 50. The conductive element 40 can fully contact the protective element 50, which increases the contact area between the conductive element 40 and the protective element 50, further improves the current transmission efficiency, and reduces the risk of electrical erosion of the bearing.

[0032] The housing 10 includes a first end plate 11 and a second end plate 12 disposed opposite to each other. The first end plate 11 has a first mounting groove 13 and a second mounting groove 14 on its two sides respectively. The first mounting groove 13 faces the second end plate 12. The second mounting groove 14 faces away from the second end plate 12. The second end plate 12 protrudes towards the first end plate 11 to form a mounting protrusion 15.

[0033] Please refer to the following: Figure 3As shown, the rotating shaft 21 includes an extension section 211 and a mounting section 212. The extension section 211 and the mounting section 212 are arranged along the axial direction of the rotor 20. The rotating shaft 21 is provided with a mounting groove 213. The mounting groove 213 is used to mount the rotor core 22 and passes through the extension section 211 and the mounting section 212 along the axial direction of the rotor 20. The mounting groove 213 is provided with an expansion opening 2130 at one end to facilitate the insertion of the rotor core 22.

[0034] The shaft 21 also includes a first assembly section 214, a second assembly section 215, and an extension section 216. The first assembly section 214 is used to assemble the first bearing 60 and is located at the end of the extension section 211 away from the mounting section 212. The second assembly section 215 is used to assemble the second bearing 70 and is located at the end of the mounting section 212 away from the extension section 211.

[0035] The extension section 216 is located at the end of the first assembly section 214 away from the extension section 211. The extension section 216 is used to mount the first gear 217 of the reducer 2. The first gear 217 cooperates with the second gear 201 of the reducer 2 to increase the torque.

[0036] The conductive component 40 and the protective component 50 are located between the first bearing 60 and the second bearing 70. By placing the conductive component 40 and the protective component 50 between the first bearing 60 and the second bearing 70, the conductive component 40 and the protective component 50 do not need to occupy the space outside the first bearing 60 and the second bearing 70, which improves the compactness of the layout, thereby reducing the size of the motor 1, expanding the application scenarios of the motor 1, and improving the versatility of the motor 1.

[0037] Specifically, the conductive component 40 is fixed to the first mounting groove 13. The outer ring of the first bearing 60 is fixed to the second mounting groove 14, and the inner ring is fixed to the first assembly section 214. The outer ring of the second bearing 70 is fixed to the second assembly section 215, and the inner ring is fixed to the mounting protrusion 15.

[0038] Please refer to the following: Figure 4 to Figure 5 As shown, the conductive element 40 includes a base 41 and a contact portion 42. One side of the base 41 abuts against the housing 10. The contact portion 42 extends from the side of the base 41 away from the housing 10 and abuts against the protective element 50. Because the base 41 has a large volume, the contact area between the conductive element 40 and the housing 10 is ensured, which improves the installation strength of the conductive element 40, enhances the conductivity, and comprehensively improves the durability of the motor.

[0039] The contact portion 42 is arranged in a continuous ring shape to further increase the contact area between the conductive element 40 and the protective element 50, thereby increasing current transmission efficiency and further reducing the risk of bearing electro-erosion. Specifically, the contact portion 42 is arranged in a densely connected brush shape. The brush-shaped contact portion 42 can bend using its own flexibility and abut against the protective element 50. Along the radial direction of the rotor 20, the thickness of the contact portion 42 is the same in the axial direction of the rotor 20. Due to the uniform thickness design of the contact portion 42, the uniformity of internal stress is ensured, the mechanical strength is improved, and the durability of the motor 1 is further improved.

[0040] The conductive component 40 is integrally molded to improve structural strength and further enhance the durability of the motor 1. The conductive component 40 can be made of carbon fiber, and the specific material is not limited. In other embodiments, the base 41 may be made of conductive metal and the contact portion 42 may be made of carbon fiber, with the base 41 and the contact portion 42 being assembled separately.

[0041] The protective element 50 is disposed on the extension 211 and covers at least part of the mounting groove 213. By providing the mounting groove 213 for mounting the rotor core 22, the installation efficiency of the rotor core 22 is improved. At the same time, by covering the mounting groove 213 with the protective element 50, damage to the conductive element 40 by the mounting groove 213 can be avoided, further increasing the service life of the motor 1. Specifically, the protective element 50 may be an annular part, sleeved on the rotating shaft 21, and covering the mounting groove 213 and the conductive element 40 at the radially opposite position of the rotor 20.

[0042] The specific types of the first bearing 60 and the second bearing 70 are not limited. The second bearing 70 can be made of ceramic material for insulation. Since the motor 1 has a conductive element 40 near one end to conduct current to the housing and a ceramic material for insulation near the other end, the current generated by the shaft 21 will only be conducted through the conductive element 40, ensuring that the first bearing 60 and the second bearing 70 are not affected by the current, further improving the durability of the motor.

[0043] This application also provides a vehicle including the aforementioned electric drive assembly. Because the electric drive assembly of this application has good durability, the reliability of the vehicle is improved. The vehicle of this application can be an electric vehicle or a hybrid vehicle, and the specific type is not limited.

[0044] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An electric motor, characterized in that, include: Housing, rotor, conductive components, and protective components; The rotor includes a rotating shaft, the protective component is sleeved on the rotating shaft and electrically connected to the rotating shaft; the conductive component is fixed to the housing. In the radial direction of the rotating shaft, the conductive element is located on the side of the protective element away from the rotating shaft and is aligned with the protective element; in the radial direction, one side of the conductive element abuts and is fixed to the protective element and is electrically conductive, and the other side of the conductive element abuts and is electrically conductive to the housing.

2. The motor according to claim 1, characterized in that, The conductive element includes a base and a contact portion. One side of the base abuts against the housing, and the contact portion extends from the side of the base away from the housing to abut against the protective element.

3. The motor according to claim 2, characterized in that, Along the radial direction, the thickness of the contact portion is the same in the axial direction of the rotor.

4. The motor according to claim 2, characterized in that, The contact portion is arranged in a continuous ring shape.

5. The motor according to claim 1, characterized in that, The conductive component is integrally formed.

6. The motor according to claim 1, characterized in that, It also includes a first bearing and a second bearing, which are sleeved on the rotating shaft and spaced apart in the axial direction of the rotating shaft; the conductive element and the protective element are located between the first bearing and the second bearing.

7. The motor according to claim 6, characterized in that, The rotating shaft includes an extension section and a mounting section arranged along the axial direction; the rotating shaft is provided with a mounting groove for mounting a rotor core; the mounting groove passes through the extension section and the mounting section along the axial direction; the protective member is disposed on the extension section and covers at least a portion of the mounting groove.

8. The motor according to claim 1, characterized in that, In the axial direction of the rotor, the conductive element is located between the two ends of the protective element.

9. An electric drive assembly, characterized in that, include: The motor as described in any one of claims 1-8.

10. A vehicle, characterized in that, include: The electric drive assembly as described in claim 9.

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