Motor stator and motor

Abstract

The invention provides a motor stator and a motor. The motor stator comprises a stator main body (1); the two oil covers are respectively arranged at the two axial ends of the stator main body (1), and the two oil covers define an annular cavity at the two axial ends of the stator main body (1); the coil (4) comprises a terminal connecting part (41), the coil (4) is arranged on the stator main body (1), the end parts of the coil (4) are exposed from the two axial ends of the stator main body (1) and are positioned in the cavity, and the terminal connecting part (41) penetrates out of the oil cover; and the bus terminal (6) is connected to the terminal connecting part (41), the bus terminal (6) is located outside the oil cover, the bus terminal (6) is provided with a wiring end (61) used for being connected with a wire, and the wiring end (61) extends in the radial direction of the motor stator.

Description

Technical Field

[0001] The present application relates to a motor stator and a motor. Background Art

[0002] Patent CN101953052A discloses a motor, in which oil caps are installed at both ends of the stator core to wrap the ends of the coil and form an oil cavity. The busbar terminal is connected to the coil, and the busbar terminal passes through the oil cap in the axial direction. The connection between the busbar terminal and the coil is located inside the oil cap, and a complex sealing structure is required between the busbar terminal and the oil cap.

[0003] In order to facilitate the installation of the oil cap, the busbar terminal extends axially through the oil cap. The axially extending busbar terminal causes the axial length of the stator to be longer, and thus the axial length of the motor to be longer. In addition, the structure of the oil cap and the seal is complicated, which will reduce the reliability of the motor and increase the cost. Summary of the invention

[0004] The present application aims to provide a motor stator to reduce the axial size of the motor stator. The present application also provides a motor including the motor stator.

[0005] The embodiment of the present application provides a motor stator, comprising:

[0006] stator body;

[0007] Two oil covers, the two oil covers are respectively installed at two axial ends of the stator body, and the two oil covers define annular cavities at two axial ends of the stator body;

[0008] a coil, the coil comprising a terminal connection portion, the coil being mounted on the stator body, ends of the coil being exposed from both axial ends of the stator body and being located in the cavity, and the terminal connection portion passing through the oil cap; and

[0009] A bus terminal is connected to the terminal connecting portion, the bus terminal is located outside the oil cover, and the bus terminal is provided with a terminal for connecting a wire, and the terminal extends in the radial direction of the motor stator.

[0010] In at least one possible implementation manner, the terminal extends radially outward of the motor stator.

[0011] In at least one possible embodiment, the oil cover comprises an inlet side oil cover and an outlet side oil cover, the inlet side oil cover is provided with an oil inlet, and the outlet side oil cover is provided with an oil outlet.

[0012] The inlet side oil cover or the outlet side oil cover is provided with a plurality of wire outlet holes, and a plurality of the terminal connection parts pass through the inlet side oil cover or the outlet side oil cover from the plurality of wire outlet holes along the axial direction of the motor stator, and there is a gap between the terminal connection part and the wire outlet holes.

[0013] In at least one possible implementation manner, the motor stator further includes a seal, which is sleeved on the terminal connecting portion, and the seal is located in a gap between the terminal connecting portion and the wire outlet hole.

[0014] In at least one possible embodiment, the inlet side oil cover or the outlet side oil cover is provided with a sink groove, the sink groove is recessed from the outer end surface of the inlet side oil cover or the outlet side oil cover, the multiple wire outlet holes are provided on the bottom wall of the sink groove, the sink groove is filled with sealant, and the sealant simultaneously seals the multiple wire outlet holes.

[0015] In at least one possible implementation, the bus terminal includes a U-shaped bent portion connected to the wiring terminal, and the U-shaped bent portion includes:

[0016] A welding portion overlapped with and welded to the terminal connecting portion in the radial direction of the motor stator;

[0017] a connecting portion connected to the terminal; and

[0018] The bottom portion connecting the welding portion and the connecting portion is closer to the stator body than the welding portion and the connecting portion in the axial direction of the motor stator.

[0019] In at least one possible implementation manner, the stator body is provided with an oil hole, the oil hole extends along the axial direction of the stator body, and the oil hole connects the two cavities located at the axial ends of the stator body.

[0020] In at least one possible implementation manner, a portion of the side wall of the oil hole is formed by the stator body, and another portion of the side wall of the oil hole is formed by the coil.

[0021] In at least one possible embodiment, the oil cover is a single-layer shell, and the cavity is used to contain cooling oil, so that the end of the coil can be at least partially immersed in the cooling oil.

[0022] The terminal connection portion is an integral part of the coil.

[0023] The present application also proposes a motor, which includes the motor stator described in any one of the above technical solutions.

[0024] By adopting the above technical solution, the present application can obtain at least one of the following beneficial effects.

[0025] (1) The connection ends of the busbar terminals extend in the radial direction of the motor stator, thereby shortening the axial length of the motor stator and reducing the axial length of the motor.

[0026] (2) Use seals and sealants to seal the oil cap, making the sealing structure simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a motor stator according to an embodiment of the present application is shown.

[0028] Figure 2 A schematic structural diagram of a motor stator at another angle according to an embodiment of the present application is shown.

[0029] Figure 3 A cross-sectional view of a motor stator according to an embodiment of the present application is shown.

[0030] Figure 4 A partial enlarged view of a stator of a motor according to an embodiment of the present application is shown.

[0031] Figure 5 and Figure 6 A schematic structural diagram of an inlet-side oil cover of a motor stator according to an embodiment of the present application is shown.

[0032] Figures 7 to 10 A schematic diagram of the installation process of a motor stator according to an embodiment of the present application is shown.

[0033] Fig.11 Shows Figure 7 A partial enlarged view of .

[0034] Fig.12 Shows Figure 8 A partial enlarged view of .

[0035] Fig.13 A schematic structural diagram of a seal of a motor stator according to an embodiment of the present application is shown.

[0036] Description of Reference Numerals

[0037] 1 stator body 11 oil hole

[0038] 2 Inlet side oil cover 21 Oil inlet 22 Outlet hole 23 Sink

[0039] 3. Outlet side oil cap

[0040] 4 Coil 41 Terminal connection part

[0041] 5 Bolts

[0042] 6 Busbar terminal 61 Connection terminal 611 Welding portion 612 Bottom portion 613 Connection portion

[0043] 7 Seals

[0044] 8. Sealant

[0045] A Axial DETAILED DESCRIPTION

[0046] In order to more clearly explain the above-mentioned purposes, features and advantages of the present application, the specific implementation methods of the present application are described in detail in this section in conjunction with the accompanying drawings. In addition to the various implementation methods described in this section, the present application can also be implemented in other different ways. Without violating the spirit of the present application, those skilled in the art can make corresponding improvements, deformations and substitutions, so the present application is not limited by the specific embodiments disclosed in this section. The scope of protection of the present application shall be subject to the claims.

[0047] like Figures 1 to 13 As shown, an embodiment of the present application provides a motor, which includes a motor stator and a motor rotor. The motor can be applied to a drive system of an electric vehicle or a hybrid vehicle.

[0048] The motor stator includes a stator body 1 , an inlet-side oil cover 2 , an outlet-side oil cover 3 , a coil 4 , a busbar terminal 6 and a seal 7 .

[0049] like Figure 1 , Figure 2 and Figure 4 As shown, the stator body 1 is cylindrical, and the stator body 1 is provided with a coil installation groove extending along its axial direction A. The coil 4 is installed in the coil installation groove, and the ends of the coil 4 can be exposed from both ends of the axial direction of the stator body 1. The wall of the coil installation groove can form an oil hole 11, and the oil hole 11 extends along the axial direction A of the motor stator. Part of the side wall of the oil hole 11 can be formed by the stator body 1, and the other part of the side wall of the oil hole 11 can be formed by the coil 4. Each coil installation groove can be installed with multiple coils, and each coil installation groove can have multiple oil holes 11. The oil holes 11 can be located on both side walls of the coil installation groove in the circumferential direction.

[0050] like Figures 1 to 4As shown, oil caps are installed at both axial ends of the stator body 1, one of which is the inlet oil cap 2, and the other is the outlet oil cap 3. The inlet oil cap 2 and the outlet oil cap 3 are annular as a whole, and the inlet oil cap 2 and the outlet oil cap 3 can be connected to the axial ends of the stator body 1. For example, the stator body 1, the inlet oil cap 2 and the outlet oil cap 3 can be fixedly connected by bolts 5. The inlet oil cap 2 and the outlet oil cap 3 define annular cavities at both axial ends of the stator body 1, respectively, and the cavities can contain cooling oil, and the ends of the coils 4 are located in the cavities. The oil cap can be a single-layer shell, so that the oil cap is easy to manufacture and has a low cost.

[0051] The oil hole 11 connects the two cavities at the axial ends of the stator body 1. The inlet side oil cover 2 is provided with an oil inlet 21, and the outlet side oil cover 3 is provided with an oil outlet hole. The cooling oil can flow into the cavity from the oil inlet 21, flow from one axial end of the stator body 1 to the other axial end through the oil hole 11, and then flow out from the oil outlet hole. The cooling oil passing through the oil hole 11 can directly contact the stator body 1 and the coil 4. The cooling oil can cool the motor stator from the inside of the stator body 1, and the end of the coil 4 can be at least partially immersed in the cooling oil in the cavity, thereby cooling the coil 4.

[0052] like Figure 5 and Figure 6 As shown, the inlet-side oil cover 2 is provided with a wire outlet hole 22 , and a plurality of wire outlet holes 22 may be provided, and the plurality of wire outlet holes 22 may be arranged along the circumferential direction of the inlet-side oil cover 2 .

[0053] like Figure 3 , Figures 7 to 12 As shown, the coil 4 is provided with a terminal connection part 41 , and there are a plurality of terminal connection parts 41 . The terminal connection part 41 can pass through the inlet-side oil cover 2 along the axial direction from the outlet hole 22 .

[0054] It is understood that the terminal connection portion 41 here can be an integral part of the coil 4 (conductor), rather than an additional terminal or other connecting member such as welded to the coil (conductor). For example, when the coil 4 is a flat wire conductor, the terminal connection portion 41 can be a part of a U-shaped hairpin unit. The coil or winding of the motor of the present application can especially be a hairpin coil or winding. Of course, the present application is not limited to this.

[0055] The cross-sectional dimension of the wire outlet hole 22 is larger than the cross-sectional dimension of the terminal connection portion 41, so that the gap between the terminal connection portion 41 and the wire outlet hole 22 of the inlet side oil cover 2 can be larger. After the coil 4 is mounted on the stator body 1, even if the position of the terminal connection portion 41 is shifted to a certain extent, the terminal connection portion 41 can still easily pass through the wire outlet hole 22.

[0056] like Figure 8 , Fig.12and Fig.13 As shown, the seal 7 may be annular and sleeved on the terminal connection portion 41 so that the seal 7 seals the gap between the terminal connection portion 41 and the wire outlet hole 22 of the inlet-side oil cover 2 .

[0057] like Figure 5 , Figures 7 to 12 As shown, the inlet side oil cover 2 is provided with a sink 23, which can be recessed from the outer end surface of the inlet side oil cover 2, and multiple outlet holes 22 can be located on the bottom wall of the sink 23. The sink 23 can accommodate a sealant 8, and the sealant 8 can cover and surround multiple seals 7 to fix the seals 7. A piece of sealant 8 can seal multiple outlet holes 22 at the same time. The uncured sealant 8 can be a liquid or a colloid, and has fluidity. The sealant 7 can prevent the uncured sealant 8 from flowing into the cavity from the gap between the terminal connection part 41 and the outlet hole 22.

[0058] like Figure 1 , Figure 2 and Fig.10 As shown, the busbar terminal 6 can be connected to the terminal connection part 41 of the coil 4 by welding, and the busbar terminal 6 is installed after the inlet side oil cover 2 is installed on the stator body 1, so that the busbar terminal 6 is located outside the inlet side oil cover 2, so that the shape of the busbar terminal 6 will not be affected by the installation of the inlet side oil cover 2. There can be multiple busbar terminals 6, and one busbar terminal 6 can connect multiple terminal connection parts 41. The busbar terminal 6 is provided with a terminal 61 for connecting a wire, and the terminal 61 of the busbar terminal 6 can extend radially outward of the motor stator, and the wire connected to the terminal 61 can also extend radially, so that the axial length of the stator can be shorter. When the motor is applied to a vehicle, this is beneficial to the vehicle space layout. Of course, since the busbar terminal 6 is not restricted by the inlet side oil cover 2, the terminal 61 can also extend in other directions.

[0059] Reference Figure 2 and Fig.10 The bus terminal 6 includes a U-shaped bent portion connected to the terminal 61, and the U-shaped bent portion includes a welding portion 611, a bottom portion 612, and a connecting portion 613. In the radial direction of the motor stator, the welding portion 611 overlaps and is welded with the terminal connecting portion 41, the connecting portion 613 is connected to the terminal 61, and the bottom portion 612 connects the welding portion 611 and the connecting portion 613. In the axial direction A of the motor stator, the bottom portion 612 is closer to the stator body 1 than the welding portion 611 and the connecting portion 613, so that the axial dimension of the bus terminal 6 is smaller.

[0060] When the welding portion 611 is welded to the terminal connection portion 41, the bottom 612 can be supported against the inlet oil cover 2, which is convenient for welding. The bottom 612 and the inlet oil cover 2 can be spaced apart, and during welding, the bottom 612 can be indirectly supported by other components. Of course, under the premise of satisfying the insulation of multiple bus terminals 6, the bottom 612 can also be directly against the inlet oil cover 2.

[0061] Reference Figures 7 to 12 , introduces the installation process of the motor stator.

[0062] The inlet oil cover 2 and the outlet oil cover 3 are installed at the axial ends of the stator body 1, so that the terminal connection part 41 of the coil 4 passes through the outlet hole 22 of the inlet oil cover 2. The seal 7 is sleeved on the terminal connection part 41, so that the seal 7 seals the gap between the terminal connection part 41 and the inlet oil cover 2, and then the sealant 8 is filled in the sink. After the sealant 8 is cured, the sealed terminal connection part 41 and the inlet oil cover 2 can be further fixed. Finally, the bus terminal 6 is welded to the terminal connection part 41, and the connection between the bus terminal 6 and the terminal connection part 41 is located outside the inlet oil cover 2.

[0063] The motor of the present application has the following beneficial effects.

[0064] (1) The connection terminal 61 of the busbar terminal extends in the radial direction of the motor stator, so that the axial length of the motor stator is shorter, thereby reducing the axial length of the motor, which is beneficial to the vehicle space layout.

[0065] (2) The oil cap is sealed using a seal 7 and a sealant 8, making the sealing structure simple and reliable.

[0066] The present application is not limited to the above embodiments, and those skilled in the art can make various modifications to the above embodiments of the present application under the guidance of the present application without departing from the scope of the present application. In addition, the following description is also made.

[0067] (1) In the above embodiment, the terminal connection portion 41 of the coil 4 is led out from the inlet side oil cap 2, but in other possible embodiments, the terminal connection portion may also be led out from the outlet side oil cap 3. In other words, the inlet side oil cap and the outlet side oil cap may exchange functions, and the cooling oil enters the cavity from the outlet side oil cap and is discharged from the cavity from the inlet side oil cap.

[0068] (2) In the above embodiment, the connection terminal 61 of the bus terminal 6 extends radially outward from the motor stator. However, in other possible embodiments, the connection terminal 61 of the bus terminal 6 may also extend radially inward from the motor stator, which can also shorten the axial length of the motor stator.

[0069] It should be understood that at least some aspects or features of the above-mentioned implementation modes, embodiments or examples may be appropriately combined.

[0070] It is understood that in the present application, when the number of parts or components is not particularly limited, the number may be one or more, and the multiple here means two or more. For the case where the number of parts or components shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., the specific number is usually exemplary and not restrictive, and it can be understood as multiple, that is, two or more, but this does not mean that the present application excludes the case of one.

[0071] In the present application, unless otherwise clearly stated or limited, the terms such as "install", "assemble", "assemble", "connect", "connect", "couple", "link", "abut", "connect", "interconnect", "intercommunication", "conduction", "fixation", "fastening" and the like should be understood in a broad sense, for example, they can be direct or indirect. For example, regarding connection, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly stated or limited. For example, regarding connectivity / conduction, it can be direct connectivity / conduction, or it can be indirect connectivity / conduction via an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0072] In the present application, unless otherwise clearly stated or limited, a component disposed on / installed on / located on / accommodated on / placed in, within, inside, etc. another component may be any of the following two situations: a part or most of the one component is located in the other component; and the one component is completely accommodated in the other component.

[0073] Although the present application is described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in this specification. The present application can be modified and implemented as a modified embodiment without departing from the subject matter and scope of the present application as determined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning for the present application.

Claims

1. A motor stator, characterized in that: include: Stator body (1); Two oil covers, the two oil covers are respectively mounted at two axial ends of the stator body (1), and the two oil covers define annular cavities at two axial ends of the stator body (1); A coil (4), the coil (4) comprising a terminal connection portion (41), the coil (4) being mounted on the stator body (1), the ends of the coil (4) being exposed from both axial ends of the stator body (1) and being located in the cavity, and the terminal connection portion (41) passing through the oil cover; and A busbar terminal (6), the busbar terminal (6) is connected to the terminal connection portion (41), the busbar terminal (6) is located outside the oil cover, the busbar terminal (6) is provided with a wiring terminal (61) for connecting a wire, and the wiring terminal (61) extends in the radial direction of the motor stator.

2. The motor stator according to claim 1, characterized in that: The connection terminal (61) extends radially outward of the motor stator.

3. The motor stator according to claim 1, characterized in that: The oil cover comprises an inlet side oil cover (2) and an outlet side oil cover (3), wherein the inlet side oil cover (2) is provided with an oil inlet (21), and the outlet side oil cover (3) is provided with an oil outlet. The inlet side oil cover (2) or the outlet side oil cover (3) is provided with a plurality of wire outlet holes (22), and a plurality of terminal connection parts (41) pass through the inlet side oil cover (2) or the outlet side oil cover (3) along the axial direction of the motor stator from the plurality of wire outlet holes (22), and a gap is provided between the terminal connection parts (41) and the wire outlet holes (22).

4. The motor stator according to claim 3, characterized in that: The motor stator further comprises a sealing member (7), wherein the sealing member (7) is sleeved on the terminal connecting portion (41), and the sealing member (7) is located in the gap between the terminal connecting portion (41) and the wire outlet hole (22).

5. The motor stator according to claim 3, characterized in that: The inlet side oil cover (2) or the outlet side oil cover (3) is provided with a sink groove (23), the sink groove (23) is recessed from the outer end surface of the inlet side oil cover (2) or the outlet side oil cover (3), the plurality of wire outlet holes (22) are provided on the bottom wall of the sink groove (23), the sink groove (23) is filled with a sealant (8), and the sealant (8) simultaneously seals the plurality of wire outlet holes (22).

6. The motor stator according to claim 3, characterized in that: The bus terminal (6) comprises a U-shaped bent portion connected to the connection terminal (61), and the U-shaped bent portion comprises: A welding portion (611) overlapped with and welded to the terminal connection portion (41) in the radial direction of the motor stator; a connecting portion (613) connected to the terminal (61); and A bottom portion (612) is connected to the welding portion (611) and the connecting portion (613); in the axial direction of the motor stator, the bottom portion (612) is closer to the stator body (1) than the welding portion (611) and the connecting portion (613).

7. The motor stator according to claim 1, characterized in that: The stator body (1) is provided with an oil hole (11), the oil hole (11) extending along the axial direction of the stator body (1), and the oil hole (11) connects the two cavities located at the axial ends of the stator body (1).

8. The motor stator according to claim 7, characterized in that: Part of the side wall of the oil hole (11) is formed by the stator body (1), and another part of the side wall of the oil hole (11) is formed by the coil (4).

9. The motor stator according to claim 1, characterized in that: The oil cover is a single-layer shell, and the cavity is used to contain cooling oil, so that the end of the coil (4) can be at least partially immersed in the cooling oil. The terminal connection portion (41) is an integral part of the coil (4).

10. A motor, characterized in that: The electric motor comprises the electric motor stator according to any one of claims 1 to 9.

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