Mounting structure of reduction gearbox and inverter, driving system and vehicle

Abstract

The invention relates to a mounting structure of a reduction gearbox and an inverter, a driving system and a vehicle, the mounting structure of the reduction gearbox and the inverter comprises the reduction gearbox and the inverter, a first cavity and a second cavity are arranged in the reduction gearbox, the first cavity is used for accommodating a first electric control unit of a speed reducer, the first cavity is provided with a first opening, and the second cavity is used for accommodating a second electric control unit of the speed reducer. The first cavity is used for containing a first opening, the second cavity is used for containing a speed reduction unit of the speed reducer, the inverter comprises an inversion shell and a second electric control unit, the inversion shell covers the position of the first opening in a sealing mode, and the second electric control unit is arranged in the first cavity and electrically connected with the first electric control unit. The mounting structure of the reduction gearbox and the inverter is high in integration degree, compact in structure and beneficial to improving the space utilization rate of the whole vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and specifically, to an installation structure of a speed reducer and an inverter, a drive system, and a vehicle. Background Art

[0002] The drive system of an electric vehicle generally includes components such as a drive motor, a speed reducer, and an inverter. Among them, the speed reducer and the inverter are connected to each other through their respective housings. In the related art, the speed reducer housing and the inverter housing are two independent components, and there is a problem of design redundancy in the assembly structure of the speed reducer housing and the inverter housing, resulting in a relatively large size of the installation structure of the speed reducer and the inverter, and reducing the space utilization rate of the whole vehicle. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, an embodiment of the present application provides an installation structure of a speed reducer and an inverter with high integration, compact structure, and beneficial to improving the space utilization rate of the whole vehicle.

[0005] An embodiment of the present application further provides a drive system.

[0006] An embodiment of the present application further provides a vehicle.

[0007] The installation structure of the speed reducer and the inverter according to the embodiment of the present application includes: a speed reducer and an inverter. A first cavity and a second cavity are provided in the speed reducer. The first cavity is used to accommodate the first electronic control unit of the speed reducer. The first cavity has a first opening. The second cavity is used to accommodate the speed reduction unit of the speed reducer. The inverter includes an inverter housing and a second electronic control unit. The inverter housing covers the position of the first opening. The second electronic control unit is disposed in the first cavity and is electrically connected to the first electronic control unit.

[0008] According to the installation structure of the speed reducer and the inverter of the embodiment of the present application, since the inverter housing covers the first opening of the speed reducer and the second electronic control unit is electrically connected to the first electronic control unit, the speed reducer and the inverter can share the first cavity, which is convenient for the wiring arrangement between the first electronic control unit and the second electronic control unit, and can simplify the installation structure at the connection position of the speed reducer and the inverter, save materials, and make the installation structure of the speed reducer and the inverter more compact. Therefore, the installation structure of the speed reducer and the inverter of the embodiment of the present application has a high degree of integration, a compact structure, and is beneficial to improving the space utilization rate of the whole vehicle.

[0009] In some embodiments, the inverter further includes an inverter cover, a third cavity is provided in the inverter housing, the third cavity has a second opening, the inverter cover is sealed at the position of the second opening, and at least one electrical component in the inverter is integrated in the third cavity.

[0010] In some embodiments, the electrical components include at least an input filter and a bus capacitor, and the input filter and the bus capacitor are fixed in the third cavity by being potted with insulating material.

[0011] In some embodiments, the inverter housing includes a bottom shell and a side shell, the second opening is arranged on the side of the side shell away from the bottom shell, the bottom shell has a first partition and a second partition in a projection plane parallel to the first opening, the side shell is arranged in the first partition and defines the third cavity with the bottom shell, the second partition is provided with a multi-phase AC output port, and the multi-phase AC output port passes through the bottom shell and is connected to the first cavity.

[0012] In some embodiments, a sealing gasket is provided at the abutment position between the inverter housing and the first opening, and the sealing gasket is arranged circumferentially around the first opening.

[0013] In some embodiments, the reduction gearbox is provided with a plurality of first mounting positions, the plurality of first mounting positions are arranged at circumferential intervals along the first opening, the inverter housing is provided with a plurality of second mounting positions, the plurality of second mounting positions correspond one-to-one to the plurality of first mounting positions, and a threaded member is passed between the first mounting positions and the second mounting positions.

[0014] In some embodiments, the inverter housing is provided with a plurality of connection positions, the reduction gearbox and the inverter are arranged along a first direction, and the plurality of connection positions are arranged on the inverter housing at intervals orthogonal to the first direction.

[0015] In some embodiments, the connection position is at least one of a water pipe connection position, a wiring harness connection position, and a grounding position; and / or, there is at least one of each of the connection positions.

[0016] A drive system according to another embodiment of the present application includes a reduction gearbox and an inverter mounting structure and a reduction gear as described in any one of the embodiments of the present application.

[0017] The drive system according to an embodiment of the present application. Since the inverter housing covers the first opening of the speed reducer, and the second electronic control unit is electrically connected to the first electronic control unit, the speed reducer and the inverter can share the first cavity, which facilitates the wiring arrangement between the first electronic control unit and the second electronic control unit, and can simplify the installation structure at the connection position of the speed reducer and the inverter, saving materials and making the installation structure of the speed reducer and the inverter more compact. Therefore, the drive system according to the embodiment of the present application has a high degree of integration and a compact structure, which is beneficial to improving the space utilization rate of the whole vehicle.

[0018] A vehicle according to another embodiment of the present application includes the drive system according to the embodiment of the present application.

[0019] For the vehicle according to the embodiment of the present application, since the inverter housing covers the first opening of the speed reducer, and the second electronic control unit is electrically connected to the first electronic control unit, the speed reducer and the inverter can share the first cavity, which facilitates the wiring arrangement between the first electronic control unit and the second electronic control unit, and can simplify the installation structure at the connection position of the speed reducer and the inverter, saving materials and making the installation structure of the speed reducer and the inverter more compact. Therefore, the drive system of the vehicle according to the embodiment of the present application has a high degree of integration and a compact structure, which is beneficial to improving the space utilization rate of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial axonometric view of the installation structure of the speed reducer and the inverter according to the embodiment of the present application.

[0021] Figure 2 It is a partial exploded view of the installation structure of the speed reducer and the inverter according to the embodiment of the present application.

[0022] Figure 3 It is a partial sectional view of the installation structure of the speed reducer and the inverter according to the embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of the inverter (removing the inverter upper cover) of the installation structure of the speed reducer and the inverter according to the embodiment of the present application.

[0024] Figure 5 It is a schematic diagram of the inverter housing of the inverter of the installation structure of the speed reducer and the inverter according to the embodiment of the present application.

[0025] REFERENCE MARKS:

[0026] 1. Reducer; 11. Speed reducer; 12. First cavity; 121. First opening; 13. Second cavity; 14. First installation position; 15. Fourth cavity;

[0027] 2. Inverter; 21. Inverter housing; 211. Bottom case; 2111. First partition; 2112. Second partition; 2113. Polyphase AC output port; 212. Side case; 213. Third cavity; 2131. Second opening; 214. Second mounting position; 215. Connection position; 2151. Water pipe connection position; 2152. Wiring harness connection position; 2153. Grounding position; 22. Inverter upper cover; 23. Input filter; 24. Bus capacitor; 25. High-voltage connector; 26. Low-voltage connector. Detailed implementation manners

[0028] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0029] Reference will be made below to the attached Figures 1 to 5 Describe the installation structure of the reduction gearbox and the inverter, the drive system, and the vehicle according to the embodiments of the present application.

[0030] As Figures 1 to 5 As shown, the installation structure of the reduction gearbox and the inverter according to the embodiments of the present application includes: a reduction gearbox 11 and an inverter 2. A first cavity 12 and a second cavity 13 are provided in the reduction gearbox 11. The first cavity 12 is used to accommodate the first electronic control unit (not shown) of the reduction gear 1. The first cavity 12 has a first opening 121. The second cavity 13 is used to accommodate the reduction unit (not shown) of the reduction gear 1. The inverter 2 includes an inverter housing 21 and a second electronic control unit (not shown). The inverter housing 21 covers the position of the first opening 121. The second electronic control unit is provided in the first cavity 12 and is electrically connected to the first electronic control unit.

[0031] In the installation structure of the reduction gearbox and the inverter according to the embodiments of the present application, since the inverter housing 21 covers the first opening 121 of the reduction gearbox 11 and the second electronic control unit is electrically connected to the first electronic control unit, it can be ensured that the reduction gear 1 and the inverter 2 share the first cavity 12, which is convenient for the wiring arrangement between the first electronic control unit and the second electronic control unit, and can simplify the installation structure of the connection position 215 of the reduction gearbox 11 and the inverter 2, save materials, and make the installation structure of the reduction gearbox and the inverter more compact. Therefore, the installation structure of the reduction gearbox and the inverter according to the embodiments of the present application has a high degree of integration and a compact structure, which is beneficial to improving the space utilization rate of the whole vehicle.

[0032] In the related art, the reducer 1 housing and the inverter housing 21 are two independent components. Independent electronic control unit accommodation cavities are provided in both the reducer housing and the inverter housing 21. The lower cover plate of the inverter 2 and the reducer 1 housing are structurally designed redundantly, increasing the overall weight of the drive system. However, in the installation structure of the speed reducer and the inverter according to the embodiments of the present application, the lower cover plate structure of the inverter 2 is omitted, so that the speed reducer 11 and the inverter 2 can share a cavity (the first cavity 12), thereby simplifying the installation structure of the inverter 2.

[0033] For example, when the inverter 2 is a dual inverter 2, the connection and insertion of the six-phase AC output terminals and the motor speed detection sensor on the second electronic control unit to the accessories on the speed reducer 11 side can be completed in the first cavity 12, eliminating the six-phase AC terminals and the speed detection interfaces separately provided on the inverter 2 and the speed reducer 11, eliminating the machining surface features, simplifying the assembly process of the assembly, and reducing the raw material and process manufacturing costs.

[0034] In some embodiments, the inverter 2 further includes an inverter upper cover 22. A third cavity 213 is provided in the inverter housing 21. The third cavity 213 has a second opening 2131. The inverter upper cover 22 is sealed at the position of the second opening 2131. At least one type of electrical component in the inverter 2 is integrated in the third cavity 213. For example, the electrical components at least include an input filter 23 and a bus capacitor 24. Of course, the electrical components can also be other components, and the present application does not limit this. The input filter 23 and the bus capacitor 24 are both fixedly installed in the third cavity 213. It can be understood that since at least one type of electrical component in the inverter 2 is integrated in the third cavity 213, the structure of the inverter 2 can be made more compact, which is beneficial to improving the space utilization rate of the whole vehicle.

[0035] Optionally, the input filter 23 and the bus capacitor 24 are fixed in the third cavity 213 by potting with an insulating material. For example, the insulating material can be an epoxy potting compound. The epoxy potting compound is liquid before potting and solidifies after high-temperature baking after potting.

[0036] It can be understood that the input filter 23 and the bus capacitor 24 of the traditional dual inverter 2 both need to be designed with plastic shells to protect, insulate, fix and support the input filter 23 and the bus capacitor 24. Compared with the traditional plastic shell fixing scheme, the present application can achieve insulation, fixing, protection and support without a plastic shell. At the same time, the distance between the positive and negative copper bars of the input filter 23 and the bus capacitor 24 can be made smaller, which is more beneficial to the structural optimization and power density improvement of the dual electronic control assembly.

[0037] Specifically, the inverter housing 21 includes a bottom case 211 and a side case 212. A second opening 2131 is provided on the side of the side case 212 away from the bottom case 211. The bottom case 211 has a first partition 2111 and a second partition 2112 in the projection plane parallel to the first opening 121. The side case 212 is disposed in the first partition 2111 and defines a third cavity 213 with the bottom case 211. A polyphase AC output port 2113 is provided on the second partition 2112. The polyphase AC output port 2113 penetrates the bottom case 211 and communicates with the first cavity 12. It can be understood that the side case 212 extends in a direction away from the first cavity 12, and the inverter upper cover 22 covers the upper side of the side case 212 to seal the third cavity 213. The polyphase AC output port 2113 can be provided on the second partition 2112 for passing through polyphase AC output terminals. By setting the inverter housing 21 as the above structure, the installation structure of the speed reducer and the inverter in the embodiment of the present application can optimize the arrangement of the parts on the inverter 2, making the structure of the inverter 2 more compact.

[0038] Further, a high-voltage connector 25 is provided on one side of the second partition 2112. The high-voltage connector 25 is electrically connected to the input filter 23 and the bus capacitor 24. A low-voltage connector 26 is provided on the other side of the second partition 2112. In other words, the high-voltage connector 25 and the low-voltage connector 26 are respectively arranged on opposite sides of the bottom case 211.

[0039] Optionally, a sealing gasket (not shown) is provided at the abutting position between the inverter housing 21 and the first opening 121. The sealing gasket is arranged around the circumference of the first opening 121. It can be understood that the sealing gasket can seal the assembly gap between the inverter housing 21 and the speed reducer 11, thereby improving the sealing effect between the inverter housing 21 and the speed reducer 11.

[0040] In some embodiments, a plurality of first mounting positions 14 are provided on the speed reducer 11. The plurality of first mounting positions 14 are arranged at intervals along the circumference of the first opening 121. A plurality of second mounting positions 214 are provided on the inverter housing 21. The plurality of second mounting positions 214 correspond to the plurality of first mounting positions 14 one by one. Threaded members are passed through between the first mounting positions 14 and the second mounting positions 214. It can be understood that the highly integrated inverter 2 and the speed reducer 11 are fixed by a plurality of threaded members to ensure sealing, increasing the stiffness of the joint position between the inverter 2 and the speed reducer 11 and reducing the difficulty of the vibration design of the drive system.

[0041] For example, the contour of the first opening 121 of the speed reducer 11 is rectangular, and at least three first mounting positions 14 are provided on any edge of the first opening 121, thereby increasing the stiffness of the joint position between the inverter 2 and the speed reducer 11.

[0042] Optionally, a variety of connection positions 215 are provided on the inverter housing 21. The speed reducer 11 and the inverter 2 are along the first direction (such asFigure 3 are arranged in the up-and-down direction), and a plurality of connection positions 215 are arranged at intervals along a direction orthogonal to the first direction on the inverter housing 21. The plurality of connection positions 215 are arranged at intervals on the inverter housing 21. In other words, the plurality of connection positions 215 can be arranged at intervals on the inverter housing 21 in the front-back direction or the left-right direction. It can be understood that the plurality of connection positions 215 can provide fixed interfaces for vehicle components, which is more conducive to the arrangement of vehicle functional components and makes the vehicle structure more compact.

[0043] In one example, the connection position 215 is at least one of a water pipe connection position 2151, a wire harness connection position 2152, and a grounding connection position 2153. Thereby, fixed interfaces can be provided for the water pipes, wire harnesses, and grounding of the vehicle. Each type of connection position 215 is at least one, that is, each type of connection position 215 can be one or more. The number of each type of connection position 215 can be designed according to the layout requirements of the components, and the present application does not limit this.

[0044] The drive system according to another embodiment of the present application includes a speed reducer and the mounting structure of the speed reducer and the inverter of the present application. The speed reducer 1 includes a speed reduction unit (not shown) and a first electronic control unit (not shown). The speed reduction unit of the speed reducer 1 is arranged in the second cavity 13, and the first electronic control units of the speed reducer 1 are all installed in the first cavity 12.

[0045] According to the drive system of the embodiment of the present application, since the inverter housing 21 covers the first opening 121 of the speed reducer 11 and the second electronic control unit is electrically connected to the first electronic control unit, it can be made such that the speed reducer 1 and the inverter 2 share the first cavity 12, which is convenient for the wiring arrangement between the first electronic control unit and the second electronic control unit, and can simplify the mounting structure of the connection positions 215 of the speed reducer 11 and the inverter 2, save materials, and make the mounting structure of the speed reducer and the inverter more compact. Therefore, the drive system of the embodiment of the present application has a high degree of integration and a compact structure, which is beneficial to improving the space utilization rate of the vehicle.

[0046] Optionally, a fourth cavity 16 is further provided in the speed reducer 11, and a drive motor (not shown) is installed in the fourth cavity 16 to make the structure of the drive system more compact.

[0047] A vehicle according to another embodiment of the present application includes the drive system of the present application. The technical advantages of the vehicle of the embodiment of the present application are the same as those of the drive system of the above embodiment, and will not be elaborated here.

[0048] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0050] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0052] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting this application, and any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the scope of protection of this application.

Claims

1. An installation structure of a speed reducer and an inverter, characterized in that include: A reduction box (11), wherein the reduction box (11) is provided with a first cavity (12) and a second cavity (13), wherein the first cavity (12) is used to accommodate a first electronic control unit of the reduction box (1), the first cavity (12) has a first opening (121), and the second cavity (13) is used to accommodate a reduction unit of the reduction box (1); An inverter (2), the inverter (2) comprising an inverter housing (21) and a second electric control unit, the inverter housing (21) being sealed at the position of the first opening (121), and the second electric control unit being arranged in the first cavity (12) and electrically connected to the first electric control unit.

2. The installation structure of the speed reducer and the inverter according to claim 1, characterized in that, The inverter (2) further comprises an inverter upper cover (22); a third cavity (213) is provided in the inverter housing (21); the third cavity (213) has a second opening (2131); the inverter upper cover (22) is sealed at the position of the second opening (2131); and at least one electrical component in the inverter (2) is integrated in the third cavity (213).

3. The installation structure of the speed reducer and the inverter according to claim 2, characterized in that The electrical components at least include an input filter (23) and a bus capacitor (24); the input filter (23) and the bus capacitor (24) are fixed in the third cavity (213) by potting with insulating material.

4. The mounting structure of the speed reducer and the inverter according to claim 2, characterized in that, The inverter housing (21) comprises a bottom shell (211) and a side shell (212); the second opening (2131) is arranged on a side of the side shell (212) away from the bottom shell (211); the bottom shell (211) has a first partition (2111) and a second partition (2112) in a projection plane parallel to the first opening (121); the side shell (212) is arranged in the first partition (2111) and defines the third cavity (213) with the bottom shell (211); the second partition (2112) is provided with a multi-phase AC output port (2113); the multi-phase AC output port (2113) passes through the bottom shell (211) and is in communication with the first cavity (12).

5. The installation structure of the speed reducer and the inverter according to claim 1, characterized in that, A sealing gasket is provided at the abutment position between the inverter housing (21) and the first opening (121), and the sealing gasket is arranged circumferentially around the first opening (121).

6. The installation structure of the speed reducer and the inverter according to claim 1, characterized in that, The reduction box (11) is provided with a plurality of first mounting positions (14), the plurality of first mounting positions (14) being arranged at intervals along the circumference of the first opening (121), the inverter housing (21) is provided with a plurality of second mounting positions (214), the plurality of second mounting positions (214) corresponding one-to-one to the plurality of first mounting positions (14), and a threaded member is provided between the first mounting positions (14) and the second mounting positions (214).

7. The installation structure of the speed reducer and the inverter according to claim 1, characterized in that, The inverter housing (21) is provided with a plurality of connection positions (215), the reduction gearbox and the inverter are arranged along a first direction, and the plurality of connection positions (215) are arranged on the inverter housing (21) at intervals orthogonal to the first direction.

8. The installation structure of the speed reducer and the inverter according to claim 7, characterized in that, The connection position (215) is at least one of a water pipe connection position (2151), a wiring harness connection position (2152) and a grounding position (2153); And / or, each of the connection bits (215) is at least one.

9. A drive system, characterized in that, Comprises an installation structure of a speed reducer and an inverter according to any one of claims 1-8.

10. A vehicle, characterized in that, Comprises a drive system according to claim 9.

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