Motor and vehicle power system

Abstract

The utility model provides a motor and a vehicle power system. The electric machine includes a vibration damping connection member, a stator assembly, and a housing. The vibration reduction connecting component comprises an inner sleeve, an elastic part and a connecting piece. The inner sleeve is made of rigid materials, and a first through hole penetrating in the axial direction of the inner sleeve is formed in the inner sleeve. And the elastic part is made of an elastic material and is fixedly mounted on the outer peripheral surface of the inner sleeve. The connecting piece penetrates through the first through hole. The stator assembly and the housing are connected in non-direct contact via a vibration damping connection member. In this way, the stator assembly and the housing can be reliably connected together, and the vibration damping connection member can reduce vibration transmitted by the stator assembly to the housing, thereby improving NVH performance. Comprising the motor is also improved in NVH (Noise Vibration and Harshness) performance.

Description

Technical Field

[0001] The present application relates to the field of electric motors, and in particular to an electric motor and a vehicle power system including the electric motor. Background Art

[0002] Currently, electric motors are widely used in pure electric vehicles and hybrid vehicles to drive the vehicles. Figure 1 In the vehicle power system shown, the vehicle power system includes a stator assembly (including a stator 20 and a stator bracket 30), a rotor (not shown) and a housing 40. The stator assembly and the rotor are housed in the housing 40. The stator 20 is mounted and fixed to the stator bracket 30, and the stator bracket 30 is fixedly connected to the housing 40 via a connecting member 10 such as a bolt, and the rotor can rotate relative to the stator 20 and is used to output torque. In this vehicle power system, the vibration generated during the operation of the stator 20 and the rotor will be directly transmitted to the housing 40, which will cause the NVH (noise, vibration and harshness) performance of the vehicle power system as a whole to deteriorate. Summary of the invention

[0003] This application is made in view of the defects in the above-mentioned technology. One purpose of this application is to provide a new type of motor, the vibration-damping connection component of which can reliably connect the stator assembly and the housing in the motor while improving the problem of NVH performance degradation caused by the vibration generated during the operation of the motor being transmitted to the housing. Another purpose of this application is to provide a vehicle power system including the above-mentioned motor.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions.

[0005] The present application provides a motor as follows, comprising a vibration-damping connection member, a stator assembly and a housing, wherein the stator assembly is formed with a first mounting hole, and the housing is formed with a second mounting hole.

[0006] The vibration-damping connecting member comprises an inner sleeve, an elastic part and a connecting piece, wherein the inner sleeve is made of a rigid material, a first through hole is formed in the inner sleeve and passes through the inner sleeve along its axial direction, the elastic part is made of an elastic material, the elastic part is fixedly mounted on the outer peripheral surface of the inner sleeve, and the connecting piece passes through the first through hole.

[0007] The vibration-damping connection member is inserted into the first mounting hole and the second mounting hole, so that the stator assembly and the housing are connected via the vibration-damping connection member in a non-direct contact manner.

[0008] In an optional solution, the vibration-damping connecting member further comprises an outer sleeve, and the outer sleeve is made of a rigid material.

[0009] The outer sleeve is formed with a second through hole extending along the axial direction, the inner sleeve, the elastic part and the connecting member are all located in the second through hole, the outer sleeve is sleeved on the radially outer side of the elastic part, and the elastic part is fixedly mounted on the inner circumferential surface of the outer sleeve.

[0010] In another optional solution, the rigid material is metal, the elastic material is rubber, and the elastic part is fixed to the inner sleeve and / or the outer sleeve by vulcanization.

[0011] In another optional solution, the elastic portion extends along the axial direction and extends continuously along the circumference of the inner sleeve; and / or the elastic portion includes a plurality of ribs spaced apart and arranged circumferentially of the inner sleeve, each of the ribs extending along the axial direction.

[0012] In another optional solution, an axial end of the elastic portion is formed with a chamfer.

[0013] In another optional solution, the length of the inner sleeve in the axial direction is greater than the length of the elastic portion in the axial direction.

[0014] In another optional solution, the second mounting hole is a stepped hole, the inner sleeve is inserted into the stepped hole, and the connecting piece is inserted into the stepped hole and threadedly connected to the housing.

[0015] In another optional solution, the stator assembly includes a stator, and the first mounting hole is formed in the iron core of the stator; or the stator assembly includes a stator and a stator bracket fixed to each other, and the first mounting hole is formed in the stator bracket.

[0016] The present application also provides a vehicle power system as follows, comprising the motor described in any one of the above technical solutions.

[0017] In an optional solution, the vehicle power system also includes a transmission, and the housing also serves as a housing of the transmission.

[0018] By adopting the above technical solution, the present application provides a new type of motor and a vehicle power system including the motor. The motor includes a vibration-damping connection member, a stator assembly and a housing, the stator assembly is formed with a first mounting hole, and the housing is formed with a second mounting hole corresponding to the position of the first mounting hole. The vibration-damping connection member includes an inner sleeve, an elastic portion and a connector, the inner sleeve is made of a rigid material, the inner sleeve is formed with a first through hole extending along its axial direction, the elastic portion is made of an elastic material, and the elastic portion is fixedly mounted on the outer circumferential surface of the inner sleeve; the connector passes through the first through hole. In this way, the vibration-damping connection member is inserted into the first mounting hole and the second mounting hole, so that the stator assembly is connected to the vibration-damping connection member via the elastic portion, and the housing is connected to the vibration-damping connection member via the connector and the inner sleeve, whereby the stator assembly and the housing are connected via the vibration-damping connection member in a non-direct contact manner.

[0019] By adopting the above solution, when the stator assembly and the housing of the motor are connected in a non-direct contact manner via a vibration-damping connection member, the stator assembly and the housing can be reliably connected together and the vibration-damping connection member can reduce the vibration transmitted from the stator assembly to the housing, thereby improving NVH performance. The NVH performance of the vehicle power system including the above motor is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram showing the partial structure of a vehicle power system.

[0021] Figure 2A It is a schematic cross-sectional view showing a partial structure of a vehicle power system according to a first embodiment of the present application.

[0022] Figure 2B It shows Figure 2A A schematic cross-sectional view of the local structure of the vibration-damping connecting component of the vehicle power system.

[0023] Figure 3A is a schematic cross-sectional view showing a partial structure of a vehicle power system according to a second embodiment of the present application.

[0024] Figure 3B It shows Figure 3A A schematic cross-sectional view of the local structure of the vibration-damping connecting component of the vehicle power system.

[0025] Description of Reference Numerals

[0026] 10 connecting piece 20 stator 30 stator bracket 40 housing

[0027] 1 vibration-damping connecting member 11 inner sleeve 11h first through hole 12 elastic part 13 connecting member 14 outer sleeve 14h second through hole 2 stator 2h iron core mounting hole 3 stator bracket 3h bracket mounting hole 4 housing 4h housing mounting hole

[0028] A is axial and R is radial. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0030] In this application, unless otherwise specified, "axial direction" refers to the axial direction of the inner sleeve of the vibration-damping connecting member, and "axial side" refers to the axial direction of the inner sleeve of the vibration-damping connecting member. Figure 2A and Figure 3A The left side of the axis refers to Figure 2A and Figure 3A on the right side of the .

[0031] In summary, the vibration-damping connection member of the vehicle power system according to the present application is used to reliably connect the stator assembly and the housing of the vehicle power system while reducing the vibration transmitted from the stator assembly to the housing, thereby improving the HVH performance of the vehicle power system. The specific structure of the vehicle power system according to different embodiments of the present application will be described below in conjunction with the accompanying drawings of the specification.

[0032] (Vehicle power system according to the first embodiment of the present application)

[0033] like Figure 2A and Figure 2B As shown, the vehicle power system according to the first embodiment of the present application includes a vibration-damping connection member 1, a stator assembly (a stator 2 and a stator bracket 3) and a housing 4. The stator 2 and the stator bracket 3 are fixed to each other. The stator bracket 3 is formed with a bracket mounting hole (a first mounting hole) 3h, and the housing 4 is formed with a housing mounting hole (a second mounting hole) 4h corresponding to the position of the bracket mounting hole 3h. The vibration-damping connection member 1 is inserted as a whole into the bracket mounting hole 3h and is interference fit with the stator bracket 3, so that the stator bracket 3 can be connected to the vibration-damping connection member 1 via the elastic portion 12. The mounting hole 4h is a stepped hole, and the connector 13 and the inner sleeve 11 of the vibration-damping connection member 1 are inserted into the housing mounting hole 4h, and the housing 4 is connected to the vibration-damping connection member 1 via the connector 13 and the inner sleeve 11.

[0034] Furthermore, if Figure 2A and Figure 2B As shown, the vibration-damping connecting component 1 includes an inner sleeve 11 , an elastic portion 12 and a connecting member 13 .

[0035] In this embodiment, the inner sleeve 11 is made of a rigid material such as metal, and is formed into a cylindrical shape extending linearly. The inner sleeve 11 is formed with a first through hole 11h penetrating along its axial direction A. Over the entire axial length of the inner sleeve 11, the thickness of the side wall of the inner sleeve 11 in the radial direction R is always the same.

[0036] In the present embodiment, the elastic portion 12 is made of an elastic material such as rubber, and the elastic portion 12 can be fixedly mounted on the outer peripheral surface of the inner sleeve 11 by vulcanization. Specifically, the elastic portion 12 is formed to extend along the axial direction A while also extending continuously along the circumferential direction for a whole circle. Over the entire axial length of the elastic portion 12, the thickness of the elastic portion 12 in the radial direction R is always the same. Furthermore, the axial length of the elastic portion 12 is smaller than the axial length of the inner sleeve 11, one axial side end of the elastic portion 12 is spaced relatively large from one axial side end of the inner sleeve 11, and the other axial side end of the elastic portion 12 is spaced relatively small from the other axial side end of the inner sleeve 11, so that the elastic portion 12 will not affect the portion of the inner sleeve 11 including one axial side end thereof, such as Figure 2A As shown, it is inserted into the housing mounting hole 4h of the housing 4.

[0037] In this embodiment, the connecting member 13 is inserted through the first through hole 11h. Specifically, in this embodiment, the connecting member 13 is a bolt, and the connecting member 13 is formed with an external thread. The connecting member 13 can also be other parts such as rivets. In this way, when the inner sleeve 11 and the connecting member 13 are inserted into the housing 4, the connecting member 13 can fix the inner sleeve 11 to the housing 4.

[0038] By adopting the above structure, the stator bracket 3 and the housing 4 are connected in a non-direct contact manner via the vibration-damping connecting member 1, that is, the stator assembly and the housing 4 are connected in a non-direct contact manner via the vibration-damping connecting member 1 (the stator assembly and the housing 4 are spaced apart from each other), thereby the elastic portion 12 of the vibration-damping connecting member 13 can effectively absorb the vibration generated during the operation of the stator assembly and the rotor, thereby reducing the vibration transmitted to the housing 4 and improving the NVH performance of the vehicle power system.

[0039] A vehicle power system according to a second embodiment of the present application is described below.

[0040] (Vehicle power system according to the second embodiment of the present application)

[0041] The structure of the vehicle power system according to the second embodiment of the present application is basically the same as the structure of the vehicle power system according to the first embodiment of the present application, and the differences between the two are mainly described below.

[0042] In this embodiment, if Figure 3A and Figure 3BAs shown, the stator assembly only includes the stator 2, but not the stator bracket. The iron core of the stator 2 itself is formed with an iron core mounting hole (first mounting hole) 2h, and the shell 4 is formed with a shell mounting hole (second mounting hole) 4h corresponding to the position of the iron core mounting hole 2h. The vibration-damping connection member 1 is inserted into the iron core mounting hole 2h as a whole and has an interference fit with the iron core of the stator 2. The connector 13 of the vibration-damping connection member 1 is inserted into the shell mounting hole 4h, so that the stator 2 is connected to the vibration-damping connection member 1 via the outer sleeve 14. The shell mounting hole 4h can be a stepped hole, and the connector 13 and the inner sleeve 11 are both inserted into the shell mounting hole 4h, and the shell 4 is connected to the vibration-damping connection member 1 via the connector 13 and the inner sleeve 11.

[0043] In addition, if Figure 3B As shown, in addition to the same structure as that described in the first embodiment, the vibration-damping connecting member 1 further includes an outer sleeve 14 .

[0044] Specifically, the outer sleeve 14 can be made of the same rigid material as the inner sleeve 11, and the outer sleeve 14 is formed into a cylindrical shape extending in a straight line. The outer sleeve 14 is coaxially arranged with the inner sleeve 11, and the outer sleeve 14 is formed with a second through hole 14h that penetrates along the axial direction A. The inner sleeve 11, the elastic part 12 and the connecting member 13 are all located in the second through hole 14h, and the outer sleeve 14 is sleeved on the radial outer side of the elastic part 12, and the elastic part 12 can be fixedly mounted on the inner circumferential surface of the outer sleeve 14 by vulcanization. In order not to hinder the inner sleeve 11 from being inserted into the housing 4, the axial length of the outer sleeve 14 is less than the axial length of the inner sleeve 11. In addition, after being installed in place, the outer sleeve 14 and the housing 4 are spaced apart from each other.

[0045] In order to facilitate the installation of the outer sleeve 14, the axial end of the elastic part 12 may be formed with a chamfer. Further, the elastic part 12 may include a plurality of ribs spaced apart and arranged circumferentially of the inner sleeve 11, the plurality of ribs being evenly distributed in the circumferential direction and each rib extending a predetermined length along the axial direction of the inner sleeve 11.

[0046] In this way, the stator 2 and the housing 4 are connected in a non-direct contact manner via the vibration-damping connection member 1, that is, the stator assembly and the housing 4 are connected in a non-direct contact manner via the vibration-damping connection member 1 (the stator assembly and the housing 4 are spaced apart from each other), thereby the vehicle power system according to the second embodiment of the present application can play the same role as the vehicle power system according to the first embodiment of the present application.

[0047] The technical solution of the present application has been described in detail in the above specific implementation modes, and supplementary explanations are given below.

[0048] i. It should be understood that the vibration-damping connection member 1 of the present application can be applied not only to vehicle power systems, but also to the connection between two components of other systems, and to reduce the vibration transmitted between the two components.

[0049] It should be understood that in the vibration-damping connecting member 1 of the present application, the inner sleeve 11 and the outer sleeve 14 can be made of different rigid materials, and the rigid materials are not limited to metals. Moreover, the elastic part 12 can be made of various elastic materials as long as it can absorb the vibration transmitted between the two components.

[0050] iii. The vehicle power system may also include a transmission, and the motor including the stator assembly and the rotor and the transmission may share a housing, or the housing of the motor and the housing of the transmission may be integrated. The vehicle power system may be an electric bridge drive system or a hybrid drive system.

[0051] iv. The present application also provides a motor, which may include a rotor, the above-mentioned stator assembly, a vibration-damping connection member, and a housing (or motor housing). The vibration-damping connection member mounts the stator assembly to the housing.

[0052] v. The stator assembly can be mounted to multiple housing mounting holes of the housing via multiple vibration-damping connecting members, and the multiple housing mounting holes can be distributed in the circumferential direction of the housing or the stator assembly. The multiple vibration-damping connecting members can use different types of connectors, for example, dowel pins and bolts.

Claims

1. A motor, characterized in that: The invention comprises a vibration-damping connection member (1), a stator assembly (2, 3) and a housing (4), wherein the stator assembly (2, 3) is formed with a first mounting hole (2h, 3h), and the housing (4) is formed with a second mounting hole (4h). The vibration-damping connecting member (1) comprises an inner sleeve (11), an elastic part (12) and a connecting piece (13); the inner sleeve (11) is made of a rigid material; the inner sleeve (11) is formed with a first through hole (11h) extending through the inner sleeve (11) along its axial direction (A); the elastic part (12) is made of an elastic material; the elastic part (12) is fixedly mounted on the outer peripheral surface of the inner sleeve (11); the connecting piece (13) passes through the first through hole (11h); The vibration-damping connection member (1) is inserted into the first mounting hole (2h, 3h) and the second mounting hole (4h), so that the stator assembly (2, 3) and the housing (4) are connected in a non-direct contact manner via the vibration-damping connection member (1).

2. The motor according to claim 1, characterized in that The vibration-damping connecting member (1) further comprises an outer sleeve (14), wherein the outer sleeve (14) is made of a rigid material. The outer sleeve (14) is formed with a second through hole (14h) extending along the axial direction (A); the inner sleeve (11), the elastic portion (12) and the connecting member (13) are all located in the second through hole (14h); and the elastic portion (12) is fixedly mounted on the inner circumferential surface of the outer sleeve (14).

3. The motor according to claim 2, characterized in that The rigid material is metal, the elastic material is rubber, and the elastic part (12) is fixed to the inner sleeve (11) and / or the outer sleeve (14) by vulcanization.

4. The electric machine according to any one of claims 1 to 3, characterized in that The elastic portion (12) extends along the axial direction (A), and the elastic portion (12) extends continuously along the circumferential direction of the inner sleeve (11); and / or The elastic portion (12) includes a plurality of ribs arranged at intervals in the circumferential direction of the inner sleeve (11), and each of the ribs extends along the axial direction (A).

5. The electric machine according to any one of claims 1 to 3, characterized in that An axial end portion of the elastic portion (12) is formed with a chamfer.

6. The electric machine according to any one of claims 1 to 3, characterized in that The length of the inner sleeve (11) in the axial direction (A) is greater than the length of the elastic portion (12) in the axial direction (A).

7. The electric machine according to any one of claims 1 to 3, characterized in that The second mounting hole (4h) is a stepped hole, the inner sleeve (11) is inserted into the stepped hole, and the connecting piece (13) is inserted into the stepped hole and is threadedly connected to the housing (4).

8. The electric machine according to any one of claims 1 to 3, characterized in that The stator assembly comprises a stator (2), and the first mounting hole (2h) is formed in the iron core of the stator (2); or The stator assembly comprises a stator (2) and a stator bracket (3) fixed to each other, and the first mounting hole (3h) is formed in the stator bracket (3).

9. A vehicle power system, characterized in that: A motor comprising the motor according to any one of claims 1 to 8.

10. The vehicle power system according to claim 9, characterized in that: The vehicle power system also includes a transmission, and the housing (4) also serves as a housing of the transmission.

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