Electric driving device

Abstract

The utility model relates to an electric driving device. The electric driving device comprises a motor cavity and an inverter cavity. The partition plate is arranged between the motor cavity and the inverter cavity, and an opening is formed in the partition plate; the bus bar assembly comprises a bus bar and a supporting body for the bus bar, and the supporting body is located in the motor cavity; the magnetic ring is located in the inverter cavity, the bus bar penetrates through the opening in the partition plate and the magnetic ring, and the bus bar assembly and the magnetic ring are fastened to the partition plate. The electric driving device is compact in overall structure, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to an electric drive device, in particular to an electric drive device used for an electric vehicle or a hybrid vehicle. Background Art

[0002] In an electric drive device, an inverter is a power conversion device that is generally installed together with an electric motor or other electrical equipment to provide power to the motor. The inverter can convert the DC power of the power battery into AC power to drive the motor. The inverter generally has an inverter housing and various components installed in the inverter housing. The lead wires of the motor winding are connected to the AC power output of the inverter through a bus bar. In order to suppress electromagnetic interference, an AC magnetic ring can be set for the bus bar to pass through.

[0003] Figure 1 The abstract drawing of an electric powertrain disclosed in US patent application US2023 / 0286364A1 is shown. As shown in the figure, the AC magnetic ring 10 is directly fixed to the housing 12 by bolts. The seal 17 is arranged on the AC magnetic ring 10 or the housing 12. Utility Model Content

[0004] In view of the above problems in the prior art, the utility model proposes an electric drive device with a compact overall structure and improved sealing effect.

[0005] Specifically, the utility model proposes an electric drive device, comprising:

[0006] Motor chamber and inverter chamber;

[0007] A partition plate is arranged between the motor chamber and the inverter chamber, and an opening is arranged on the partition plate;

[0008] A busbar assembly, comprising a busbar and a support for the busbar, wherein the support is located in the motor chamber;

[0009] A magnetic ring is located in the inverter chamber, and the bus bar passes through the opening on the partition plate and the magnetic ring.

[0010] Wherein, the busbar assembly and the magnetic ring are fastened to the spacer plate.

[0011] According to an embodiment of the present invention, the support body is made of plastic and partially covers the bus bar.

[0012] According to an embodiment of the utility model, a support block is formed on one side of the support body, the support block cooperates with the opening structure, and the bus bar is led out from the support block and passes through the magnetic ring.

[0013] According to an embodiment of the present utility model, the motor chamber further comprises a sealing ring, which is arranged between the partition plate and the support body, and the sealing ring is used to isolate the motor chamber from the opening.

[0014] According to an embodiment of the utility model, an annular groove is provided on a surface of the support body that is close to the spacer plate, and the sealing ring cooperates with the annular groove structure.

[0015] According to an embodiment of the present invention, the support body and the magnetic ring are fastened to the spacer plate by bolts.

[0016] According to one embodiment of the utility model, a mounting hole is provided on one of the supporting bodies of the magnetic ring and the busbar assembly, and a threaded hole is provided on the other supporting body of the magnetic ring and the busbar assembly, and the bolt passes through the mounting hole and the spacer plate and is screwed into the threaded hole to fasten the magnetic ring and the busbar assembly to the spacer plate.

[0017] According to an embodiment of the utility model, mounting parts extend outwardly on both sides of the magnetic ring, and the mounting holes are arranged on the mounting parts.

[0018] According to an embodiment of the present invention, the threaded holes are arranged on both sides of the support body in the length direction.

[0019] According to an embodiment of the present utility model, the threaded hole is a blind hole structure.

[0020] According to an embodiment of the present invention, a sealing ring is provided on the surface of the support body that abuts against the spacer plate and is located around the threaded hole.

[0021] According to an embodiment of the utility model, the electric drive device further includes an insulator disposed in the through hole of the magnetic ring.

[0022] The utility model provides an electric drive device, wherein a support body and a magnetic ring are fixed on both sides of a partition plate, a bus bar passes through the magnetic ring and is connected to an inverter chamber, the overall structure is compact, and the sealing performance is easily improved.

[0023] It should be understood that the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the present invention, and they are included and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with this specification serve to explain the principles of the present invention. In the accompanying drawings:

[0025] Figure 1 A summary drawing of an electric powertrain disclosed in U.S. patent application US2023 / 0286364A1 is shown.

[0026] Figure 2 A schematic structural diagram of an electric drive device according to an embodiment of the utility model is shown.

[0027] Figure 3 yes Figure 2 A partial enlarged schematic diagram of .

[0028] Figure 4 The figure shows a schematic structural diagram of an electric drive device on the magnetic ring side according to an embodiment of the utility model.

[0029] Figure 5 A front view of a busbar assembly of an electric drive device according to an embodiment of the present utility model is shown.

[0030] Figure 6 A schematic structural diagram of a busbar assembly of an electric drive device according to an embodiment of the utility model is shown.

[0031] The above drawings include the following reference numerals:

[0032] Electric drive device 100

[0033] Motor chamber 101

[0034] Inverter chamber 102

[0035] Spacer 103

[0036] Bus bar assembly 104

[0037] Magnetic ring 105

[0038] Busbar 106

[0039] Opening 107

[0040] Support body 108

[0041] Support block 109

[0042] Lead wire 110

[0043] Sealing ring 111

[0044] Mounting section 112

[0045] Bolt 113

[0046] Threaded hole 114

[0047] Sealing ring 115

[0048] Ring groove 116

[0049] Plastic housing 117

[0050] Permanent magnet 118 DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0058] Figure 2 The schematic diagram of the structure of an electric drive device according to an embodiment of the utility model is shown, and the electric drive device is used for an electric vehicle or a hybrid vehicle. Figure 3 yes Figure 2A partial enlarged schematic diagram. As shown in the figure, an electric drive device 100 mainly includes a motor chamber 101, an inverter chamber 102, a partition plate 103, a busbar assembly 104 and a magnetic ring 105. The motor is arranged in the motor chamber 101, the inverter assembly is arranged in the inverter chamber 102, and the lead wire of the stator winding of the motor is electrically connected to the AC output end of the inverter assembly through the busbar assembly 104. The busbar assembly 104 includes a busbar 106 and a support body 108.

[0059] The partition plate 103 is disposed between the motor chamber 101 and the inverter chamber 102, and is used to separate the motor chamber 101 as a wet chamber from the inverter chamber 102 as a dry chamber. An opening 107 is provided on the partition plate 103 for the busbar 106 to pass through.

[0060] The busbar assembly 104 includes the aforementioned busbar 106 and a support body 108 partially covering the busbar 106. The support body 108 is located in the motor chamber 101 and is fastened to the partition plate 103. Specifically, the busbar 106 is made of conductive metal, including UVW phase copper bars, and the support body 108 formed of plastic is molded outside the busbar 106. Figure 4 In the figure, three copper bars for UVW phases and a copper bar for boost charging are shown.

[0061] The magnetic ring 105 is located within the inverter chamber 102 and is fastened to the spacer plate 103. Figure 2 and 3 One end of the bus bar 106 passes through the opening 107 on the partition plate 103 and the magnetic ring 105 from right to left, and is connected to the inverter chamber 102. The other end of the bus bar 106 is connected to the lead wire 110 of the motor winding in the motor chamber 101. In this embodiment, the magnetic ring 105 includes a plastic shell 117 and a permanent magnet 118 disposed in the plastic shell 117, and the magnetic ring 105 is used to suppress electromagnetic interference.

[0062] Preferably, the support body 108 is made of plastic and partially covers the bus bar 106 .

[0063] Preferably, a support block 109 is formed on one side of the support body 108. The support block 109 is matched with the structure of the opening 107. Specifically, the side of the support body 108 provided with the support block 109 is attached to the spacer 103. The size of the support block 109 is comparable to the size of the opening 107, and the support block 109 is suitable for extending into the opening 107. The bus bar 106 is led out from the support block 109 and passes through the magnetic ring 105. The purpose of providing the support block 109 is to facilitate the assembly of the bus bar assembly 104 and the spacer 103, so that the overall structure of the bus bar assembly 104 and the spacer 103 is more stable.

[0064] Preferably, the motor chamber 101 further includes a sealing ring 111. The sealing ring 111 is clamped between the partition plate 103 and the support body 108. The sealing ring 111 is used to isolate the motor chamber 101 from the opening 107 of the partition plate 103, so as to achieve sealed isolation between the motor chamber 101 and the inverter chamber 102, and prevent the liquid in the motor chamber 101 from entering the inverter chamber 102 through the opening 107.

[0065] Preferably, an annular groove 116 is provided on the side of the support body 108 that is close to the spacer plate 103. The sealing ring 111 is structurally matched with the annular groove 116. As an example but not a limitation, the annular groove 116 can also be provided on the spacer plate 103 to set the sealing ring 111.

[0066] Preferably, the support body 108 is fastened to the spacer plate 103 by bolts.

[0067] Figure 4 The figure shows a schematic structural diagram of an electric drive device on the magnetic ring side according to an embodiment of the utility model. Figure 5 A front view of a busbar assembly of an electric drive device according to an embodiment of the present utility model is shown. Figure 6 The schematic diagram of the structure of the busbar assembly of the electric drive device according to one embodiment of the utility model is shown. Preferably, the magnetic ring 105 is fastened to the spacer plate 103 by bolts 113 .

[0068] It should be noted that the "bolt" in the present invention refers to a threaded fastener, including a screw.

[0069] Preferably, a mounting hole is provided on one of the support bodies 108 of the magnetic ring 105 and the busbar assembly 104, and a threaded hole is provided on the other of the support bodies 108 of the magnetic ring 105 and the busbar assembly 104. Bolts are screwed into the threaded holes through the mounting holes and the spacer plate 103 to fasten the magnetic ring 105 and the busbar assembly 104 to the spacer plate 103.

[0070] In one embodiment of the present invention, reference Figure 4 , mounting portions 112 extend outwardly on both sides of the magnetic ring 105. Mounting holes are provided on the mounting portions 112, and bolts 113 pass through the mounting holes. Figure 5, threaded holes 114 are provided on both sides of the support body 108 of the busbar assembly 104 in the length direction. The bolts 113 passing through the mounting holes of the magnetic ring 105 pass through the spacer plate 103 and are threadedly fitted with the threaded holes 114 on the support body 108 to be fixed. In other words, by tightening the bolts 113, the magnetic ring 105 and the busbar assembly 104 are fixed to the spacer plate 103. Specifically, the plastic housing 117 of the magnetic ring 105 and the support body 108 of the busbar assembly 104 are tightened to clamp the spacer plate 103, thereby fastening the magnetic ring 105 and the busbar assembly 104 to the spacer plate 103, so that the overall structure is stable. It should be noted that in the traditional structure, the magnetic ring is usually fixed to the housing alone by bolts. In this embodiment, the reverse bolt 113 is used to tighten the magnetic ring 105 and the busbar assembly 104 tightly against the spacer plate 103 from the inverter chamber 102 side through the threaded fit of the bolt 113 and the threaded hole 114, thereby improving the overall structural stability.

[0071] Preferably, the threaded hole 114 on the support body 108 of the busbar assembly 104 is a blind hole structure. In other words, the threaded hole 114 connects the surface layer and the inner layer of the support body 108, but does not penetrate the entire support body 108. The bolt 113 for fixing the magnetic ring 105 is threadedly matched with the threaded hole 114 of the support body 108 of the busbar assembly 104, and the bolt 113 passes through the spacer plate 103 to fasten the magnetic ring 105, the busbar assembly 104 and the spacer plate 103 together.

[0072] Preferably, a sealing ring 115 is provided on the surface of the support body 108 abutting against the partition plate 103 and around the threaded hole 114. The sealing ring 115 is used to isolate the bolt 113 from the motor chamber 101, to prevent the liquid inside the motor chamber 101 from contacting the surface of the bolt 113, and to prevent the oil inside the motor chamber 101 from entering the inverter chamber 102 through the through hole on the partition plate 103 through which the bolt 113 passes.

[0073] Preferably, the electric drive device 100 further includes an insulator. The insulator is disposed in the through hole of the magnetic ring 105 to provide insulation between the magnetic ring 105 and the bus bar 106 .

[0074] In another embodiment, a threaded hole may be formed on the plastic housing 117 of the magnetic ring 105 in the inverter chamber 102, and a mounting hole may be formed on the support 108 of the bus bar assembly 104 in the motor chamber 101. Bolts are passed through the mounting holes on the support 108 of the bus bar assembly 104 and the spacer plate 103 from the motor chamber 101 side, and screwed into the threaded holes on the plastic housing 117 of the magnetic ring 105 in the inverter chamber 102, thereby fastening the magnetic ring 105, the bus bar assembly 104, and the spacer plate 103 together.

[0075] The electric drive device provided by the utility model has the following advantages:

[0076] The support body and the magnetic ring of the busbar assembly are fixed on both sides of the partition plate, and the busbars of the busbar assembly are led out from the support body, pass through the partition plate and the magnetic ring, and are connected to the inverter chamber, so that the overall structure is compact;

[0077] Reverse bolts are used to fasten the busbar assembly, magnetic ring and spacer plate to make the structure more stable;

[0078] The sealing ring is arranged between the support body and the spacer plate of the busbar assembly to improve the sealing performance.

[0079] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. An electric drive device, characterized in that: include: Motor chamber and inverter chamber; A partition plate is arranged between the motor chamber and the inverter chamber, and an opening is arranged on the partition plate; A busbar assembly, comprising a busbar and a support for the busbar, wherein the support is located in the motor chamber; A magnetic ring is located in the inverter chamber, and the bus bar passes through the opening on the partition plate and the magnetic ring. Wherein, the busbar assembly and the magnetic ring are fastened to the spacer plate.

2. The electric drive device according to claim 1, characterized in that: The support body is made of plastic and partially covers the bus bar.

3. The electric drive device according to claim 2, characterized in that: A support block is formed on one side of the support body, the support block cooperates with the opening structure, and the bus bar is led out from the support block and passes through the magnetic ring.

4. The electric drive device according to claim 1, characterized in that: The motor chamber further comprises a sealing ring, which is arranged between the partition plate and the support body, and the sealing ring is used to isolate the motor chamber from the opening.

5. The electric drive device according to claim 4, characterized in that: An annular groove is provided on a surface of the support body that is close to the spacer plate, and the sealing ring cooperates with the annular groove structure.

6. The electric drive device according to claim 1, characterized in that: The support body and the magnetic ring are fastened to the spacer plate by bolts.

7. The electric drive device according to claim 6, characterized in that: A mounting hole is provided on one of the supporting bodies of the magnetic ring and the busbar assembly, and a threaded hole is provided on the other supporting body of the magnetic ring and the busbar assembly. The bolt passes through the mounting hole and the spacer plate and is screwed into the threaded hole to fasten the magnetic ring and the busbar assembly to the spacer plate.

8. The electric drive device according to claim 7, characterized in that: Mounting parts extend outwardly on both sides of the magnetic ring, and the mounting holes are arranged on the mounting parts.

9. The electric drive device according to claim 8, characterized in that: The threaded holes are arranged on both sides of the support body in the length direction.

10. The electric drive device according to claim 9, characterized in that: The threaded hole is a blind hole structure.

11. The electric drive device according to claim 9, characterized in that: A sealing ring is provided on the surface of the support body that abuts against the spacer plate and is located around the threaded hole.

12. The electric drive device according to claim 1, characterized in that: It also includes an insulator, which is arranged in the through hole of the magnetic ring.

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