Motor, electric drive assembly and power device

Abstract

The utility model is suitable for the field of motors, and provides a motor, an electric drive assembly and a power device, and the motor comprises a housing which is internally provided with a first flow channel; the end cover is arranged on the shell in a covering mode, a second flow channel communicated with the first flow channel is formed in the end cover, and a first oil spraying hole is formed in the second flow channel; and the connecting assembly is used for being electrically connected with a controller, the connecting assembly and the end cover are arranged adjacently, and the first oil spraying hole faces the connecting assembly. According to the motor provided by the embodiment of the invention, the heat dissipation efficiency and the heat dissipation effect of the connecting assembly can be improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor, an electric drive assembly and a power device. Background Art

[0002] The rapid development of new energy vehicles has gradually increased the requirements for high-power output of electric drive assemblies. The high-power output of electric drives will cause the motor and controller to generate more heat. Limited by the insulation level of the motor and the temperature tolerance of the controller components, high-power electric drive assemblies need to not only control the temperature rise of the motor and controller, but also consider the temperature rise of the connection components. The connection component is used to electrically connect the motor and the controller. The connection component usually includes a three-phase copper busbar. If the temperature rise of the connection component is out of control, the temperature field of the motor and the controller will be coupled, which will cause the internal temperature of the controller to be too high and affect the performance.

[0003] At present, some motors transfer the heat of the copper busbar to the housing via a thermal pad, and use the housing's own heat capacity and heat dissipation to reduce the temperature of the copper busbar. However, the heat dissipation efficiency of this method needs to be improved, and the heat dissipation effect is poor. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a motor, an electric drive assembly and a power device, which can improve the heat dissipation efficiency and heat dissipation effect of the connection components.

[0005] An embodiment of a first aspect of the present application provides a motor, comprising:

[0006] a housing, wherein a first flow channel is provided in the housing;

[0007] An end cover is disposed on the housing, a second flow channel communicating with the first flow channel is disposed in the end cover, and a first oil injection hole is disposed in the second flow channel;

[0008] A connecting component is used for electrically connecting to a controller. The connecting component is arranged adjacent to the end cover, and the first oil injection hole is arranged toward the connecting component.

[0009] The motor provided in the embodiment of the present application includes a shell, an end cover and a connecting assembly. A first flow channel is provided in the shell and a second flow channel connected to the first flow channel is provided in the end cover. A first oil spray hole corresponding to the connecting assembly is provided on the second flow channel. Therefore, the motor can conduct part of the cooling medium in the first flow channel in the shell to the second flow channel, and use the first oil spray hole on the second flow channel to spray the cooling medium toward the connecting assembly to achieve heat dissipation and cooling of the connecting assembly. Since the cooling medium is directly sprayed toward the connecting assembly, the heat dissipation efficiency and heat dissipation effect of the connecting assembly can be improved, and the heat dissipation reliability is high. In addition, the structure of the motor is simple, and the cooling medium in the motor is directly used to cool the connecting assembly. There is no need to set up heat transfer elements such as thermal pads for heat dissipation, and the cost is low.

[0010] In some embodiments, the connection assembly includes a three-phase copper bar, the three-phase copper bar includes three copper bars, at least three of the first oil injection holes are provided on the second flow channel, and each of the copper bars is arranged corresponding to at least one of the first oil injection holes.

[0011] By adopting the above technical solution, the multiple first oil spray holes on the second flow channel can cool the three copper bars respectively, so that the three-phase copper bars can obtain better cooling efficiency and cooling effect.

[0012] In some embodiments, the three copper bars are arranged along a first direction, and the plurality of the first oil injection holes are arranged at intervals along the first direction.

[0013] By adopting the above technical solution, each first oil injection hole can be arranged toward the copper busbar, thereby solving the problem that some copper busbars cannot be cooled or the cooling effect is poor.

[0014] In some embodiments, the axial direction of the first oil injection hole is perpendicular to or inclined to the first direction.

[0015] By adopting the above technical solution, the oil injection angle of the first oil injection hole can be flexibly adjusted according to demand to obtain a better cooling effect.

[0016] In some embodiments, the connection assembly further includes a star-point copper busbar, the number of the oil injection holes is at least four and at least one of the oil injection holes is arranged toward the star-point copper busbar.

[0017] By adopting the above technical solution, the second flow channel can cool the star point copper busbar and the three-phase copper busbar at the same time, meeting the cooling requirements of the electric drive assembly.

[0018] In some embodiments, a boss is provided on a side of the end cover facing the connecting component, the second flow channel is located inside the boss, and the first oil injection hole is provided on a surface of the boss facing the connecting component.

[0019] By arranging a second flow channel in the boss of the end cover, on the premise of ensuring a safe insulating electrical gap between the first oil injection hole and the copper busbar, the distance between the first oil injection hole and the connecting component can be kept as small as possible to improve the cooling effect.

[0020] In some embodiments, the motor further comprises a cooling pipe, the first flow channel comprises a motor cooling flow channel and a guide flow channel formed in the cooling pipe, and the cooling pipe is connected to the end cover;

[0021] One end of the guide channel is communicated with the motor cooling channel, and the other end of the guide channel is communicated with the second channel. The cooling medium in the motor cooling channel flows to the second channel via the guide channel.

[0022] By adopting the above technical solution, the motor provided in the embodiment of the present application can use its own motor cooling channel and cooling pipe to provide cooling medium for the connecting component, and the cooling structure is relatively simple and the cost is low.

[0023] In some embodiments, an extension direction of the cooling tube is parallel to an axial direction of the shell.

[0024] By adopting the above technical solution, since the extension direction of the cooling pipe is parallel to the axial direction of the shell, it is convenient to connect the cooling pipe from the motor cooling channel to the end cover, the volume of the cooling pipe is small, and the structure of the motor is simpler.

[0025] In some embodiments, the motor further includes a first bearing seat, a bearing and an oil guide member, the first bearing seat is provided with an inner hole, the bearing is mounted in the inner hole, and the oil guide member connects the first flow channel and the inner hole.

[0026] By adopting the above technical solution, part of the cooling medium in the cooling pipe is guided to the second flow channel, and another part of the cooling medium is guided from the oil guide member to the inner hole of the first bearing seat. The motor provided in the embodiment of the present application can effectively lubricate and cool the bearings.

[0027] In some embodiments, a second oil spray hole is provided at one end of the first flow channel close to the end cover, a bearing seat oil guide hole connected to the inner hole is opened on the bearing seat, the oil guide member is an oil guide groove body, the oil guide groove body is provided on the end cover, one port of the oil guide groove body is connected to the second oil spray hole, and the other port of the oil guide groove body is connected to the bearing seat oil guide hole.

[0028] By adopting the above technical solution, the above motor can not only cool the connection components, but also lubricate and cool the bearings, thereby solving the problem of high difficulty in cooling and lubricating the bearings.

[0029] An embodiment of the second aspect of the present application provides an electric drive assembly, comprising the motor and the controller as described in the first aspect, wherein the motor and the controller are electrically connected via the connecting component.

[0030] An embodiment of the third aspect of the present application provides a power device, comprising the electric drive assembly of the second aspect.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 is a schematic diagram of the structure of a motor provided in some embodiments of the present application;

[0034] Figure 2 is a schematic diagram of the structure of a first flow channel in a motor provided in some embodiments of the present application;

[0035] Figure 3 It is a schematic diagram of the assembly structure of the end cover, cooling pipe, bearing seat and oil guide member provided in some embodiments of the present application;

[0036] Figure 4 It is a cross-sectional schematic diagram of a cooling tube provided in some embodiments of the present application.

[0037] The meanings of the marks in the figure are:

[0038] 100, motor; 10, housing; 11, first flow channel; 111, motor cooling flow channel; 112, flow guide flow channel; 12, cooling pipe; 121, input port; 122, second oil spray hole; 20, end cover; 21, second flow channel; 211, first oil spray hole; 22, boss; 30, connecting assembly; 31, three-phase copper busbar; 311, copper busbar; 312, star-point copper busbar; 40, bearing seat; 41, inner hole; 42, oil guide hole of bearing seat; 50, oil guide part. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] The electric drive assembly is the core component of new energy electric vehicles. Its function is to convert chemical energy into kinetic energy of electric vehicles. Its function is equivalent to the powertrain of traditional fuel vehicles - engine and transmission. The electric drive assembly is a drive system that uses the motor as a power source, including a controller, motor and transmission mechanism. The motor is electrically connected to the controller through a connecting component.

[0048] In addition to controlling the temperature rise of the motor and controller, high-power electric drive assemblies also need to consider the temperature rise of the connection components. The connection components usually include three-phase copper busbars. If the temperature rise of the connection components is out of control, the temperature fields of the motor and controller will be coupled, which will cause the internal temperature of the controller to be too high and affect performance. At present, some motors transfer the heat of the copper busbar to the casing through thermal pads, and use the casing's own heat capacity and heat dissipation structure to reduce the temperature of the copper busbar. However, the heat dissipation efficiency of this method needs to be improved, and the heat dissipation effect is poor.

[0049] In view of this, the present application proposes a motor, which directly guides the cooling medium of the motor itself to the connecting component, sprays the cooling medium onto the connecting component, realizes the heat dissipation and cooling of the connecting component, and improves the heat dissipation efficiency and heat dissipation effect of the connecting component. The motor includes a housing, an end cover and a connecting component, a first flow channel is provided in the housing, a second flow channel connected to the first flow channel is provided in the end cover, a plurality of first oil spray holes are provided on the second flow channel, the connecting component is arranged adjacent to the end cover, and the first oil spray hole is arranged toward the connecting component. The motor provided in the embodiment of the present application can conduct part of the cooling medium in the first flow channel of the housing to the second flow channel, and use the first oil spray hole on the second flow channel to spray the cooling medium toward the connecting component to achieve heat dissipation and cooling of the connecting component. Since the cooling medium is sprayed directly toward the connecting component, the heat dissipation efficiency and heat dissipation effect of the connecting component can be improved, the heat dissipation reliability is high, and the structure of the motor is simple, and there is no need to set up heat-conducting elements such as thermal pads for heat dissipation, and the cost is low.

[0050] The electric drive assembly disclosed in the embodiment of the present application can be used as a power source of a power device, such as electric tools, electric bicycles, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles, spacecraft, etc.

[0051] For the convenience of explanation, a power device is provided in accordance with an embodiment of the present application, and the power device is explained by taking a vehicle as an example.

[0052] Please refer to Figures 1 to 3 An embodiment of the first aspect of the present application proposes a motor 100, including a shell 10, an end cover 20 and a connecting assembly 30, wherein a first flow channel 11 is provided in the shell 10; the end cover 20 is covered on the shell 10, and a second flow channel 21 connected to the first flow channel 11 is provided in the end cover 20, and a first oil injection hole 211 is provided on the second flow channel 21; the connecting assembly 30 is used to be electrically connected to a controller, the connecting assembly 30 is arranged adjacent to the end cover 20, and the first oil injection hole 211 is arranged toward the connecting assembly 30.

[0053] The motor 100 is the power source of the electric drive assembly and refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. The motor 100 includes a stator and a rotor. The stator drives the rotor to rotate to realize the conversion of electric energy into mechanical energy, thereby outputting torque to the outside. When the stator drives the rotor to rotate, it will generate heat, which requires the motor 100 to be cooled.

[0054] The housing 10 and the end cover 20 together form a housing, which is used to support and protect the internal components of the motor 100. The housing 10 is the main part of the housing, and the end cover 20 is a cover structure covered on the housing 10. The rotor and the stator are both installed in the housing, and the rotor and the stator are supported and protected by the housing. The connection component 30 is used to realize the mutual connection between the motor 100 and the controller. The connection component 30 may include a three-phase copper bus 31. It can be understood that the connection component 30 may also include cables or other connectors.

[0055] In order to ensure the normal operation of the motor 100, a cooling medium needs to be supplied to take away the heat in the stator and the rotor. The first flow channel 11 is a channel for circulating the cooling medium. When the cooling medium circulates in the first flow channel 11, the cooling medium can exchange heat with the components in the motor 100 to cool the motor 100. The cooling medium can be cooling oil, which can directly contact the heat-generating components of the motor 100 and has high heat dissipation efficiency. The oil medium has the advantages of good insulation, high dielectric constant, low freezing point and high boiling point, which can improve the efficiency density of the motor 100. It can be understood that the cooling medium can also be other liquids, such as water; the cooling medium can also be a gas.

[0056] The end cover 20 is provided with a second flow channel 21 connected with the first flow channel 11, so that the cooling medium can flow from the first flow channel 11 to the second flow channel 21; the second flow channel 21 is provided with a first oil injection hole 211, and the number of the first oil injection hole 211 can be one or more, and the first oil injection hole 211 is used to spray the cooling medium toward the connecting component 30. Among them, the second flow channel 21 can have a variety of shapes. For example, the second flow channel 21 is a strip shape. It can be understood that the second flow channel 21 can also be a ring shape, a U-shaped shape, etc.

[0057] Figure 1 The arrows in the figure indicate the flow direction of the cooling medium. Figures 1 to 3 As shown, the cooling principle of the motor 100 is as follows: the cooling medium in the first flow channel 11 cools the components in the motor 100, at least part of the cooling medium in the first flow channel 11 flows to the second flow channel 21 in the end cover 20, and sprays the cooling medium toward the connecting assembly 30 through the first oil spray hole 211 to cool the connecting assembly 30. It can be understood that the cooling medium sprayed onto the surface of the connecting assembly 30 can be collected and recycled.

[0058] The motor 100 provided in the embodiment of the present application includes a shell 10, an end cover 20 and a connecting component 30. A first flow channel 11 is provided in the shell 10 and a second flow channel 21 connected to the first flow channel 11 is provided in the end cover 20. A first oil spray hole 211 corresponding to the connecting component 30 is provided on the second flow channel 21. Therefore, the motor 100 can conduct part of the cooling medium in the first flow channel 11 in the shell 10 to the second flow channel 21, and use the first oil spray hole 211 on the second flow channel 21 to spray the cooling medium toward the connecting component 30 to achieve heat dissipation and cooling of the connecting component 30. Since the connecting component 30 is arranged adjacent to the end cover 20 and the cooling medium is directly sprayed toward the connecting component 30, the path for the cooling medium to be transported to the connecting component 30 is effectively shortened, thereby improving the heat dissipation efficiency and heat dissipation effect of the connecting component 30, and the heat dissipation reliability is high. In addition, the structure of the motor 100 is simple, and the cooling medium in the motor 100 is directly used to cool the connecting component 30. There is no need to set up heat transfer elements such as thermal pads for heat dissipation, and the cost is low. The motor 100 provided in the embodiment of the present application has low cost and good reliability in cooling the connecting component 30. Furthermore, the motor 100 can adjust the temperature rise of the connecting component 30. Under the premise that the temperature rise of the controller and the motor 100 is controllable, the output current of the controller can be appropriately relaxed to obtain a higher power density.

[0059] In the motor 100 provided in the embodiment of the present application, the first flow channel 11 is also used to dissipate heat for the components inside the motor 100. The motor 100 does not need to add a separate oil supply circuit for the cooling connection assembly 30, which is beneficial to simplifying the oil circuit and improving the compactness of the space, and reduces oil resistance and improves the working efficiency of the oil pump.

[0060] like Figure 1 As shown, in some embodiments, the connection assembly 30 includes a three-phase copper busbar 31, and the three-phase copper busbar 31 includes three copper busbars 311; at least three first oil injection holes 211 are provided on the second flow channel 21, and each copper busbar 311 is correspondingly arranged with at least one first oil injection hole 211.

[0061] The three-phase copper bar 31 is a conductive material commonly used in power transmission and distribution systems. It consists of three copper bars 311 and is usually used to connect transformers, switchgear and loads. The three copper bars 311 can be arranged in parallel or distributed in an irregular form. At least three first oil injection holes 211 are provided on the second flow channel 21, and each copper bar 311 is arranged corresponding to at least one first oil injection hole 211. For example, three first oil injection holes 211 are provided on the second flow channel 21, and the three first oil injection holes 211 are arranged one by one with the three copper bars 311. It can be understood that the number of the first oil injection holes 211 can also be more than three, and in this case, one copper bar 311 can correspond to multiple first oil injection holes 211.

[0062] By adopting the above technical solution, the multiple first oil injection holes 211 on the second flow channel 21 can cool the three copper bars 311 respectively, so that the three-phase copper bars 31 obtain better cooling efficiency and cooling effect.

[0063] In some embodiments, three copper bars 311 are arranged along the first direction, and a plurality of first oil injection holes 211 are arranged at intervals along the first direction.

[0064] The first direction may be perpendicular to the axial direction of the motor 100. In some embodiments, the first direction is the X direction. Since the arrangement direction of the plurality of first oil injection holes 211 is the same as the arrangement direction of the three copper bars 311, the distance difference between each copper bar 311 and the corresponding first oil injection hole 211 is shortened, and the problem that some copper bars 311 cannot be cooled or the cooling effect is poor is solved, so that the heat dissipation effect of each copper bar 311 is roughly the same, and the problem of inconsistent temperature difference of multiple copper bars 311 is effectively improved. Furthermore, the distance between the plurality of first oil injection holes 211 and the corresponding copper bar 311 can be set to be equal, so that the heat dissipation efficiency of the three copper bars 311 is more balanced.

[0065] It can be understood that in other embodiments, the extension direction of the second flow channel 21 can be parallel to the first direction, or can be arranged at a certain angle to the first direction.

[0066] In some embodiments, the axial direction of the first oil injection hole 211 is perpendicular to or inclined to the first direction.

[0067] like Figure 1As shown, the axial direction of the first oil injection hole 211 is perpendicular to the first direction, so that the first oil injection hole 211 can vertically spray the cooling medium onto the surface of the three-phase copper busbar 31. The axial direction of the first oil injection hole 211 can be adjusted. In other embodiments, the axial direction of the first oil injection hole 211 can also be inclined to the first direction.

[0068] By adopting the above technical solution, the injection angle of the first injection hole 211 can be flexibly adjusted according to demand to obtain a better cooling effect. In addition, the aperture of the first injection hole 211 can also be flexibly adjusted according to demand, and the apertures of different first injection holes 211 can be equal or different.

[0069] In some embodiments, the connection assembly 30 further includes a star-point copper bar 312 , the number of the first oil injection holes 211 is at least four, and at least one first oil injection hole 211 is disposed toward the star-point copper bar 312 .

[0070] by Figure 1 For example, the connection assembly 30 includes four first oil injection holes 211 , wherein three of the first oil injection holes 211 face the three-phase copper busbar 31 and one first oil injection hole 211 faces the star point copper busbar 312 .

[0071] The star point copper bus 312 is a special copper bus, which is mainly used for grounding and protective grounding in electrical systems. It usually adopts a circular or polygonal cross-section to meet the grounding requirements of different occasions and equipment. The star point copper bus 312 can be a star point copper bus for Boost. For the newly added 800V electric drive system with Boost function, the temperature rise of the star point copper bus 312 is more challenging. In the embodiment of the present application, at least one first oil injection hole 211 is arranged on the second flow channel 21, and the second flow channel 21 can cool the star point copper bus 312 and the three-phase copper bus 31 at the same time to meet the cooling requirements of the electric drive assembly.

[0072] Please refer to Figure 1 and Figure 3 In some embodiments, a boss 22 is provided on the side of the end cover 20 facing the housing 10 , the second flow channel 21 is located inside the boss 22 , and the first oil injection hole 211 is provided on the surface of the boss 22 facing the connecting assembly 30 .

[0073] The boss 22 is convexly disposed on the side of the end cover 20 facing the connection assembly 30, and the first oil injection hole 211 is disposed on the surface of the boss 22 facing the connection assembly 30. The boss 22 may be in a strip shape to adapt to the shape of the second flow channel 21, and the cross-sectional shape of the boss 22 may be square, cylindrical, etc.

[0074] By setting the second flow channel 21 in the boss 22 of the end cover 20, under the premise of ensuring the safe insulation electrical gap between the first oil injection hole 211 and the copper busbar 311, the distance between the first oil injection hole 211 and the connecting component 30 can be kept as small as possible to improve the cooling efficiency and cooling effect.

[0075] It can be understood that in other embodiments, the boss 22 can be omitted, and the second flow channel 21 can also be directly disposed inside the end cover 20 .

[0076] Please refer to Figures 1 to 4 In some embodiments, the motor 100 includes a cooling pipe 12, the first flow channel 11 includes a motor cooling flow channel 111 and a guide flow channel 112 formed in the cooling pipe 12, the cooling pipe 12 is connected to the end cover 20, one end of the guide flow channel 112 is connected to the motor cooling flow channel 111, and the other end is connected to the second flow channel 21, and the cooling medium in the motor cooling flow channel 111 flows to the second flow channel 21 via the guide flow channel 112.

[0077] The motor cooling channel 111 is used for heat exchange with the internal space of the shell 10 to cool the components inside the shell 10, including cooling the stator and / or rotor; the motor cooling channel 111 can be arranged around the outer shell of the motor 100, and the motor cooling channel 111 can include multiple sub-channels, wherein the input channel of the cooling pipe 12 is connected to one of the sub-channels.

[0078] The cooling pipe 12 is a pipe body used to guide the cooling medium so that the cooling medium in the first flow channel 11 can flow to the second flow channel 21. The cooling pipe 12 is directly connected to the end cover 20, which can make the cooling pipe 12 and the end cover 20 relatively fixed and convenient to connect the cooling pipe 12 and the end cover 20.

[0079] By adopting the above technical solution, the motor 100 provided in the embodiment of the present application can use its own motor cooling channel 111 and cooling pipe 12 to provide cooling medium for the connecting component 30, and the cooling structure is relatively simple and the cost is low.

[0080] like Figure 1 As shown, in some embodiments, the extension direction of the cooling tube 12 is parallel to the axial direction of the motor 100, and the axial direction of the motor 100 is the length direction of the rotating shaft ( Figure 1 Since the extension direction of the cooling pipe 12 is parallel to the axial direction of the motor 100, it is convenient to connect the cooling pipe 12 from the motor cooling channel 111 to the end cover 20, the volume of the cooling pipe 12 is small, and the structure of the motor 100 is simple.

[0081] Please refer to Figure 2 and Figure 4In some embodiments, the motor 100 further includes a first bearing seat 40, a bearing (not shown) and an oil guide member 50. The first bearing seat 40 is provided with an inner hole 41, the bearing is mounted in the inner hole 41, and the oil guide member 50 connects the first flow channel 11 and the inner hole 41.

[0082] The inner hole 41 of the first bearing seat 40 is used to install the bearing of the motor 100. The motor 100 also includes a second bearing seat (not shown). The first bearing seat 40 is arranged opposite to the second bearing seat. The bearing is installed in the first bearing seat 40 and the second bearing seat, wherein the first bearing seat 40 and the end cover 20 are located at the same end, that is, the first bearing seat 40 is located at the non-driving end of the motor 100. The motor 100 outputs power from its driving end. The driving end of the motor is used to connect the load. The driving end can be connected to an external driven component or a load such as a transmission. The oil guide 50 can be a structure such as a tube body and a slot body, and is used to guide the cooling medium in the cooling pipe 12 to the inner hole 41 of the first bearing seat 40.

[0083] By adopting the above technical solution, part of the cooling medium in the cooling pipe 12 is guided to the second flow channel 21, and another part of the cooling medium is guided from the oil guide member 50 to the inner hole 41 of the first bearing seat 40. The motor 100 provided in the embodiment of the present application can effectively lubricate and cool the bearings.

[0084] In some embodiments, a second oil injection hole 122 is provided at one end of the first flow channel 11 close to the end cover 20, and a bearing seat oil guide hole 42 connected to the inner hole 41 is opened on the first bearing seat 40; the oil guide member 50 is an oil guide groove body, and the oil guide groove body is provided on the end cover 20, one port of the oil guide groove body is connected to the second oil injection hole 122, and the other port of the oil guide groove body is connected to the bearing seat oil guide hole 42.

[0085] The oil guide member 50 is an oil guide groove body. Exemplarily, the oil guide groove body includes two oppositely arranged groove walls, the two ends of the groove walls are respectively connected to the end cover 20 and the bearing seat 40, and the groove opening of the oil guide groove body is arranged toward the cooling pipe 12; one or more second oil spray holes 122 are arranged on the cooling pipe 12, and the second oil spray holes 122 can be located at one end of the cooling pipe 12 close to the end cover 20. The second oil spray holes 122 can spray part of the cooling medium in the cooling pipe 12 into the oil guide groove body, so that the cooling medium flows through the bearing seat oil guide hole 42 at the bottom of the oil guide groove body to the inner hole 41 of the bearing seat 40 to lubricate and cool the bearing.

[0086] In addition, the axial direction of the second oil injection hole 122 can be perpendicular to or inclined to the axial direction of the cooling pipe 12, as long as the second oil injection hole 122 can inject the cooling medium in the cooling pipe 12 into the oil guide groove body.

[0087] By adopting the above technical solution, the embodiment of the present application can not only cool the connection component 30, but also utilize the cooling medium provided by the first flow channel 11 to lubricate and cool the bearing, thereby solving the problem of high difficulty in cooling and lubricating the bearing.

[0088] In other embodiments, the oil guide member 50 may also be a tube or other structure capable of guiding oil.

[0089] In other embodiments, the cooling pipe 12 may be omitted, and the flow guide channel 112 may be directly formed in the housing 10 , as long as the second oil injection hole 122 provided on the first flow channel 11 can provide cooling medium to the oil guide member 50 .

[0090] Please refer to Figures 1 to 4 Some embodiments of the present application provide a motor 100, including a shell 10, an end cover 20 and a connecting assembly 30, the connecting assembly 30 includes a three-phase copper busbar 31, wherein a first flow channel 11 is provided in the shell 10, the end cover 20 is covered on the shell 10, a second flow channel 21 connected to the first flow channel 11 is provided in the end cover 20, and a plurality of first oil injection holes 211 are provided on the second flow channel 21; the three-phase copper busbar 31 is arranged adjacent to the end cover 20, and the plurality of first oil injection holes 211 are arranged toward the three-phase copper busbar 31. The axial direction of the first oil spray hole 211 is set perpendicularly or inclined to the first direction, and the aperture, number and position of the first oil spray hole 211 can be adjusted according to needs to obtain a better cooling effect, and can adapt to the cooling requirements of products of different voltage platforms and power platforms; a boss 22 is provided on the side of the end cover 20 facing the connecting component 30, and the second flow channel 21 is located inside the boss 22. The first oil spray hole 211 is provided on the surface of the boss 22 facing the three-phase copper busbar 31, so that a shorter distance can be set between the first oil spray hole 211 and the three-phase copper busbar 31, thereby improving the cooling efficiency and cooling effect.

[0091] The electric drive assembly may also include an oil pump, a filter and a heat exchanger. The oil pump is used to pump out cooling oil. The filter is used to filter the cooling oil pumped out from the oil pump. The heat exchanger is used to perform heat exchange on the filtered cooling oil to reduce the temperature of the cooling oil. The cooling oil after heat exchange treatment is transported to the first flow channel 11.

[0092] The cooling principle of the above-mentioned motor 100 is as follows: the cooling oil pumped out by the oil pump enters the oil cooler after effective filtration, and the oil temperature of the cooling oil is reduced through heat exchange in the oil cooler. After that, the cooled cooling oil is output from the heat exchanger and guided to the input port 121 of the cooling pipe 12 through the first flow channel 11, and then enters the cooling pipe 12. The cooling pipe 12 is connected and conducted to the second flow channel 21 opened on the end cover 20, so that the cooling oil enters the second flow channel 21 and is sprayed onto the surface of the three-phase copper busbar 31 through the first oil spray hole 211; a second oil spray hole 122 is also opened on the cooling pipe 12, and the cooling oil sprayed from the second oil spray hole 122 enters the inside of the bearing seat 40 along the oil guide groove body on the end cover 20 and the bearing seat oil guide hole 42 on the end cover 20 to lubricate the bearing.

[0093] The second embodiment of the present application provides an electric drive assembly, including the motor 100 and the controller provided in the first aspect, wherein the motor 100 and the controller are electrically connected via a connecting assembly 30. The electric drive assembly may further include a reducer connected to the motor 100.

[0094] An embodiment of the third aspect of the present application provides a power device, comprising the electric drive assembly provided by the second aspect.

[0095] The power device may be an electric tool, an electric bicycle, an electric car, a ship, a spacecraft, etc. Among them, the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A motor, characterized in that: include: a housing, wherein a first flow channel is provided in the housing; An end cover is disposed on the housing, a second flow channel communicating with the first flow channel is disposed in the end cover, and a first oil injection hole is disposed in the second flow channel; A connecting component is used for electrically connecting to a controller. The connecting component is arranged adjacent to the end cover, and the first oil injection hole is arranged toward the connecting component.

2. The motor according to claim 1, characterized in that: The connection assembly includes a three-phase copper bar, the three-phase copper bar includes three copper bars, at least three of the first oil injection holes are provided on the second flow channel, and each of the copper bars is correspondingly arranged to at least one of the first oil injection holes.

3. The motor according to claim 2, characterized in that: The three copper bars are arranged along a first direction, and the plurality of the first oil injection holes are arranged at intervals along the first direction.

4. The motor according to claim 3, characterized in that: The axial direction of the first oil injection hole is perpendicular to or inclined to the first direction.

5. The motor according to claim 2, characterized in that: The connection assembly further comprises a star point copper bar, the number of the oil injection holes is at least four and at least one of the oil injection holes is arranged toward the star point copper bar.

6. The motor according to claim 1, characterized in that: A boss is provided on one side of the end cover facing the connecting component, the second flow channel is located inside the boss, and the first oil injection hole is provided on a surface of the boss facing the connecting component.

7. The motor according to any one of claims 1 to 6, characterized in that: The motor further comprises a cooling pipe, the first flow channel comprises a motor cooling flow channel and a flow guide flow channel formed in the cooling pipe, and the cooling pipe is connected to the end cover; One end of the guide channel is communicated with the motor cooling channel, and the other end of the guide channel is communicated with the second channel. The cooling medium in the motor cooling channel flows to the second channel via the guide channel.

8. The motor according to claim 7, characterized in that: The extending direction of the cooling pipe is parallel to the axial direction of the motor.

9. The motor according to any one of claims 1 to 6, characterized in that: The motor further includes a first bearing seat, a bearing and an oil guide member, the first bearing seat is provided with an inner hole, the bearing is mounted in the inner hole, and the oil guide member is connected with the first flow channel and the inner hole.

10. The motor according to claim 9, characterized in that: A second oil spray hole is provided at one end of the first flow channel close to the end cover, and a bearing seat oil guide hole connected to the inner hole is opened on the bearing seat. The oil guide member is an oil guide groove body, and the oil guide groove body is provided on the end cover. One port of the oil guide groove body is connected to the second oil spray hole, and the other port of the oil guide groove body is connected to the bearing seat oil guide hole.

11. An electric drive assembly, characterized in that: It comprises the motor and the controller as described in any one of claims 1 to 10, wherein the motor is electrically connected to the controller via the connecting component.

12. A power device, characterized in that: Comprising the electric drive assembly as claimed in claim 11.

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