Shell assembly, electric drive assembly and vehicle

Abstract

The invention discloses a shell assembly, an electric drive assembly and a vehicle, the shell assembly is used for the electric drive assembly, the electric drive assembly comprises a power part and a speed change part which are arranged in the shell assembly, and the shell assembly comprises a separation part, a first shell, a second shell, a flow guide part and a heat exchange part. The separation part is provided with a first through hole and a second through hole. The first shell and one side of the separation part jointly define a driving cavity suitable for containing a power component. And the second shell and the other side of the separation part jointly define a speed change cavity. One end of the flow guide part is communicated with the first through hole, and the other end of the flow guide part is communicated with the variable-speed cavity; the heat exchange part is suitable for circulation of a second heat exchange medium and exchanges heat with the flow guide part. The first heat exchange medium in the speed change cavity is suitable for entering the flow guide part and entering the driving cavity through the first through hole, and the first heat exchange medium in the driving cavity is suitable for being guided into the speed change cavity through the second through hole. Due to the fact that the first heat exchange medium is not guided out of the shell assembly, the risk of leakage of the first heat exchange medium is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive devices, and in particular to a housing component, an electric drive assembly and a vehicle. Background Art

[0002] The electric drive assembly includes a housing component, a power component and a speed-changing component. The housing component defines a drive cavity and a speed-changing cavity. The power component is disposed in the drive cavity, and the speed-changing component is disposed in the speed-changing cavity. A first heat exchange medium is disposed in both the drive cavity and the speed-changing cavity. In addition to the function of exchanging heat for the power component and / or the speed-changing component, the first heat exchange medium may also have the function of lubricating the power component and the speed-changing component in some embodiments. The driving force generated by the power component is transmitted to the speed-changing component and then drives the speed-changing component to move. After the speed-changing component obtains the driving force, it increases or decreases the torque and outputs the power.

[0003] Both the power components and the speed change components will generate heat during operation. In order not to affect the operation of the electric drive assembly, both need to be cooled. The existing cooling method is to export the first heat exchange medium contained in the speed change cavity out of the shell assembly and make the first heat exchange medium exchange heat with the heat exchanger located outside the shell assembly. The first heat exchange medium with a lower temperature after the heat exchange is introduced into the speed change cavity again (or directly into the drive cavity). The first heat exchange medium with a lower temperature in the speed change cavity can be introduced into the drive cavity, and the first heat exchange medium in the drive cavity can be introduced into the speed change cavity, thereby forming a heat exchange cycle. In the above scheme, when the electric drive assembly reaches a certain service life, the first heat exchange medium is prone to leakage at the interface during the process of exporting and introducing the first heat exchange medium into the shell assembly. Summary of the invention

[0004] The main purpose of the present invention is to provide a housing assembly, an electric drive assembly and a vehicle, which can reduce the risk of leakage of the first heat exchange medium in the electric drive assembly.

[0005] To achieve the above object, the present invention provides a housing assembly for an electric drive assembly, wherein the electric drive assembly includes a power component, a speed change component and a first heat exchange medium arranged in the housing assembly, and the housing assembly includes:

[0006] A partition portion, provided with a first through hole and a second through hole;

[0007] A first housing, which together with one side of the partition defines a driving cavity suitable for accommodating the power component;

[0008] A second housing, which together with the other side of the partition defines a shift chamber suitable for accommodating the shift component;

[0009] A guide portion is provided in the speed change chamber, one end of the guide portion is connected to the first through hole, and the other end is connected to the speed change chamber,

[0010] A heat exchange part, adapted to flow a second heat exchange medium, the heat exchange part being used to perform heat exchange with the flow guide part;

[0011] The first heat exchange medium in the speed change cavity is suitable for entering the guide portion and entering the driving cavity through the first through hole, and the first heat exchange medium in the driving cavity is suitable for being introduced into the speed change cavity through the second through hole.

[0012] In some embodiments, the heat exchange portion is disposed in the speed change chamber, and the flow guide portion is in contact with the heat exchange portion;

[0013] The second housing is provided with a first inlet and a first outlet communicating with the speed change chamber, the heat exchange portion defines a first heat exchange chamber, one side of the heat exchange portion is provided with a second inlet respectively communicating with the first inlet and the first heat exchange chamber, and the other side of the heat exchange portion is provided with a second outlet respectively communicating with the first outlet and the first heat exchange chamber;

[0014] The second heat exchange medium is suitable for entering the first heat exchange chamber through the first inlet and the second inlet, and is suitable for flowing out of the first heat exchange chamber through the first outlet and the second outlet.

[0015] In some embodiments, the air guide portion is integrally connected to the partition portion, the heat exchange portion is detachably connected to the partition portion, and the heat exchange portion abuts against a side of the air guide portion away from the partition portion.

[0016] In some embodiments, an opening is provided on a side of the guide portion facing away from the partition portion, and the heat exchange portion covers the opening, so that the side wall of the heat exchange portion facing the guide portion and the guide portion together define a second heat exchange cavity for conducting the first heat exchange medium.

[0017] In some embodiments, the guide portion includes an annular protrusion protruding from the wall surface of the partition portion facing the speed change chamber, the opening is formed on the side of the annular protrusion facing away from the partition portion, and the annular protrusion, the partition portion and the heat exchange portion jointly define the second heat exchange chamber.

[0018] In some embodiments, the annular protrusion has a first outer peripheral wall, the heat exchange portion has a second outer peripheral wall arranged around the circumference of the annular protrusion, and the first outer peripheral wall is flush with the second outer peripheral wall along the direction from the heat exchange portion to the guide portion.

[0019] In some embodiments, the inner circumferential wall of the annular protrusion includes a first inner wall and a second inner wall arranged opposite to each other, and the guide portion also includes a plurality of first ribs and a plurality of second ribs, one end of each of the first ribs is connected to the first inner wall, and the other end is spaced from the second inner wall, one end of each of the second ribs is connected to the second inner wall, and the other end is spaced from the first inner wall, along the flow direction of the first heat exchange medium in the second heat exchange cavity, each of the first ribs and each of the second ribs are alternately arranged one by one, and along the direction from the heat exchange portion to the guide portion, one side of each of the first ribs and each of the second ribs is connected to the partition portion, and the other side abuts the heat exchange portion.

[0020] In some embodiments, a flow direction of the second heat exchange medium in the heat exchange portion is opposite to a flow direction of the first heat exchange medium in the flow guide portion.

[0021] In some embodiments, the partition is provided with a first positioning hole, the second housing is provided with a second positioning hole, and the first positioning hole and the second positioning hole are used to jointly position the output shaft of the electric drive assembly;

[0022] The guide portion is arranged around a hole axis of the first positioning hole and / or the second positioning hole.

[0023] In some embodiments, along a direction from the second shell to the partition, the guide portion at least partially does not overlap with the driving cavity.

[0024] In some embodiments, the second housing includes a connecting side wall, and the connecting side wall includes an inner wall facing the speed-changing cavity and an outer wall facing away from the speed-changing cavity;

[0025] The heat exchange part is connected to the outer wall of the connecting side wall, and the heat exchange part and the outer wall of the connecting side wall jointly define a first heat exchange cavity; the flow guide part is connected to the inner wall of the connecting side wall, and the flow guide part and the inner wall of the connecting side wall jointly define a second heat exchange cavity;

[0026] Along the wall thickness direction of the connecting side wall, the first heat exchange cavity and the second heat exchange cavity at least partially overlap.

[0027] The embodiment of the second aspect of the present application further provides an electric drive assembly, including:

[0028] The housing assembly described in any one of the above items;

[0029] The power component is arranged in the driving cavity;

[0030] The speed change component is arranged in the speed change cavity and is driven by the power component.

[0031] In some embodiments, the electric drive assembly also includes a heat exchanger and a heat exchange pipeline, wherein the heat exchange pipeline is connected to the heat exchanger and the heat exchange part respectively, and the heat exchange pipeline is used to guide the second heat exchange medium in the heat exchange part to the heat exchanger and guide the second heat exchange medium in the heat exchanger to the heat exchange part.

[0032] In some embodiments, a lower portion of the guide portion is immersed in the first heat exchange medium, and an upper portion thereof extends out of the first heat exchange medium.

[0033] An embodiment of the third aspect of the present application further provides a vehicle comprising the electric drive assembly described in any one of the above items.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In the technical solution of the present invention, a flow guide is provided in the speed-changing cavity to realize the heat exchange cycle of the first heat exchange medium in the speed-changing cavity and the driving cavity. Moreover, in the present invention, a heat exchange portion is newly provided, and the heat exchange portion directly exchanges heat with the flow guide located in the speed-changing cavity, so the first heat exchange medium does not need to be exported from the shell body, thereby reducing the risk of leakage of the first heat exchange medium at the position of the inlet interface or outlet interface of the shell body during the process of being introduced into or exported from the shell body. Furthermore, when the electric drive assembly having the shell assembly needs to exchange heat, the first heat exchange medium in the shell assembly can only move in the shell assembly, and the overall movement path of the first heat exchange medium is shorter, so that heat exchange can be performed more quickly, and the heat exchange efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 It is a cross-sectional schematic diagram of a housing assembly in the first embodiment of the present invention;

[0038] Figure 2 is a three-dimensional schematic diagram of a housing assembly in a second embodiment of the present invention;

[0039] Figure 3 It is a three-dimensional schematic diagram of the housing assembly in the second embodiment of the present invention after the second housing is removed;

[0040] Figure 4 is a three-dimensional schematic diagram of a second housing in a second embodiment of the present invention;

[0041] Figure 5This is a three-dimensional schematic diagram of the shell assembly in the second embodiment of the present invention after the second shell is removed; wherein the heat exchange portion removes the side wall close to the second shell;

[0042] Figure 6 It is a side view schematic diagram of the shell assembly in the second embodiment of the present invention after the second shell is removed; wherein the heat exchange portion removes the side wall close to the second shell;

[0043] Figure 7 for Figure 6 A partial cross-sectional view at AA in the middle;

[0044] Figure 8 for Figure 6 A partial cross-sectional view of the middle BB;

[0045] Fig. 9 It is a three-dimensional schematic diagram of the shell assembly in the second embodiment of the present invention after removing the second shell and the heat exchange part;

[0046] Fig.10 for Fig. 9 A partial enlarged schematic diagram of the M in the middle;

[0047] Fig.11 It is a three-dimensional schematic diagram of a heat exchange portion in a second embodiment of the present invention;

[0048] Fig.12 It is a cross-sectional schematic diagram of the combination of the heat exchange part and the flow guide part in the third embodiment of the present invention;

[0049] Fig.13 Schematic cross-sectional view of a shell assembly in a fourth embodiment of the present invention.

[0050] Description of Figure Numbers:

[0051] 10-housing assembly;

[0052] 100-shell body;

[0053] 110 - first housing; 111 - driving chamber;

[0054] 120 - second housing; 121 - speed change chamber; 122 - first inlet; 123 - first outlet; 124 - second positioning hole; 125 - first conduit; 126 - third conduit; 127 - connecting side wall;

[0055] 130 - partition; 131 - partition; 1311 - first through hole; 1312 - second through hole; 1313 - third through hole; 1314 - first positioning hole; 132 - first annular flange; 133 - second annular flange;

[0056] 140-flow guide; 141-second heat exchange cavity; 142-annular protrusion; 1421-opening; 143-first connecting wall; 144-second connecting wall; 145-first peripheral wall; 146-first rib plate; 147-second rib plate;

[0057] 150 - heat exchange part; 151 - first heat exchange chamber; 152 - second inlet; 153 - second outlet; 154 - third rib plate; 155 - second conduit; 156 - fourth conduit; 157 - second peripheral wall;

[0058] 160-Drive unit.

[0059] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] In one scenario, both the power component and the speed change component will generate heat during operation. In order not to affect the operation of the electric drive assembly, both need to be cooled down. In another scenario, when the external ambient temperature is low, in order not to affect the operation of the electric drive assembly, the speed change component and the power component need to be heated up. In the prior art, the first heat exchange medium in the electric drive assembly is used for heat exchange to achieve temperature control of the power component and the speed change component. Specifically, the first heat exchange medium in the speed change cavity of the electric drive assembly is led out of the shell assembly and the first heat exchange medium is heat exchanged with the heat exchanger located outside the shell assembly. The first heat exchange medium after heat exchange is introduced into the speed change cavity again (or directly into the drive cavity). The first heat exchange medium after heat exchange in the speed change cavity can be introduced into the drive cavity, and the first heat exchange medium in the drive cavity can be introduced into the speed change cavity, thereby forming a heat exchange cycle. In the above scheme, the first heat exchange medium needs to be led out of the shell assembly to exchange heat. The running path of the first heat exchange medium is long and the heat exchange efficiency is low.

[0062] In view of this, see Figure 1-Figure 12 In an embodiment of the present application, a housing assembly 10 is provided, and the housing assembly 10 is used in an electric drive assembly. In addition to the housing assembly 10, the electric drive assembly also includes a power component, a speed change component, and a first heat exchange medium disposed in the housing assembly 10.

[0063] Specifically, when the electric drive assembly uses a motor to generate driving force, in one embodiment, the power component can be a motor composed of a stator and a rotor, and the motor is arranged in the housing assembly 10. In another embodiment, the power component can also include only a rotor, in which case a part of the housing assembly 10 serves as a stator, and the rotor is arranged in the housing assembly 10 and cooperates with the stator of the housing assembly 10 to output power.

[0064] The speed change component is connected to the power component, and is used to obtain the driving force of the power component and output the power after increasing or decreasing the torque. The speed change component can be used to increase or decrease speed. When the speed change component is used to increase speed, the speed change component reduces the driving force of the power component by the torque and then outputs it. At this time, relative to the output shaft of the power component, the speed of the output shaft of the speed change component increases and the torque decreases. When the speed change component is used to decrease speed, the speed change component increases the driving force of the power component by the torque and then outputs it. At this time, relative to the output shaft of the power component, the speed of the output shaft of the speed change component decreases and the torque increases. In other embodiments, the speed change component may also include multiple gears, and different gears have different output speeds and output torques, which are not described here. The specific structure of the speed change component depends on actual needs. In this embodiment, the speed change component is a gear mechanism, that is, the speed change component is a plurality of gears meshing with each other.

[0065] For ease of description, the following example is taken in which the power component includes a motor and a speed-changing component for deceleration.

[0066] See also Figure 1-Figure 5 The shell assembly 10 includes a shell body 100 and a heat exchange part 150. The shell body 100 defines a drive chamber 111 and a speed change chamber 121. The drive chamber 111 is suitable for accommodating power components, and the speed change chamber 121 is suitable for accommodating speed change components. The shell body 100 is provided with a first inlet 122 and a first outlet 123 connected to the speed change chamber 121. The drive chamber 111 and the speed change chamber 121 of the shell body 100 can be connected to each other. A first heat exchange medium is provided in the shell body 100. The first heat exchange medium can be heat exchange oil. The first heat exchange medium can circulate between the drive chamber 111 and the speed change chamber 121 in the shell body 100 (in other embodiments, the first heat exchange medium can also be provided only in the speed change chamber 121). Specifically, in the working state, the drive chamber 111 and the speed change chamber 121 can be arranged relative to each other in the transverse direction. At this time, the first heat exchange medium naturally fills the lower part of the drive chamber 111 and the speed change chamber 121 due to gravity. In this embodiment, the first heat exchange medium can cool down or heat the power component and the speed change component. In some embodiments, the first heat exchange medium can also lubricate the power component and the speed change component.

[0067] The first inlet 122 and the first outlet 123 are both used to conduct the second heat exchange medium (the second heat exchange medium can specifically be water), and the second heat exchange medium is used to perform heat exchange with the first heat exchange medium. The first inlet 122 and the first outlet 123 can be arranged at any position of the shell body 100, and it is only necessary that the first inlet 122 and the first outlet 123 can be connected to the speed change chamber 121. In some embodiments, the first inlet 122 and the first outlet 123 can both be directly connected to the speed change chamber 121, and in other embodiments, the first inlet 122 and the first outlet 123 can both be indirectly connected to the speed change chamber 121 (for example, the first inlet 122 and the first outlet 123 are both connected to the drive chamber 111, and the drive chamber 111 is connected to the speed change chamber 121). In this embodiment, refer to Figure 3-Figure 4 The first inlet 122 and the first outlet 123 are both directly connected to the speed change chamber 121 .

[0068] See also Figure 1 as well as Figure 3The heat exchange part 150 is arranged in the speed change cavity 121. The heat exchange part 150 defines a first heat exchange cavity 151. The first heat exchange cavity 151 is used to circulate the second heat exchange medium. A second inlet 152 is provided on one side of the heat exchange part 150, and a second outlet 153 is provided on the other side. The second inlet 152 of the heat exchange part 150 is respectively connected to the first inlet 122 and the first heat exchange cavity 151, and the second outlet 153 of the heat exchange part 150 is respectively connected to the first outlet 123 and the first heat exchange cavity 151. The second heat exchange medium outside the housing assembly 10 is suitable for entering the first heat exchange cavity 151 through the first inlet 122 and the second inlet 152, and is suitable for flowing out of the first heat exchange cavity 151 through the first outlet 123 and the second outlet 153. The first heat exchange medium in the speed change cavity 121 passes through the outer wall of the heat exchange part 150 to perform heat exchange with the second heat exchange medium in the heat exchange part 150. In other words, after the heat exchange is completed in the outside world (outside the shell assembly 10), the second heat exchange medium can directly enter the first heat exchange chamber 151 through the first inlet 122 and the second inlet 152. Since the heat exchange part 150 is located in the speed change chamber 121, the second heat exchange medium is equivalent to entering the speed change chamber 121 (but the second heat exchange medium in the speed change chamber 121 is isolated from other components outside the first heat exchange chamber 151). Since the first heat exchange medium is partially located in the speed change chamber 121, the first heat exchange medium in the speed change chamber 121 can directly or indirectly contact the outer wall of the heat exchange part 150 to exchange heat with the second heat exchange medium in the heat exchange part 150. After the heat exchange with the first heat exchange medium, the second heat exchange medium is discharged from the first heat exchange chamber 151 through the first outlet 123 and the second outlet 153 (the second heat exchange medium is also equivalent to being discharged from the speed change chamber 121). After being exported from the first heat exchange chamber 151, the second heat exchange medium can exchange heat with the outside air through the heat exchanger outside the shell assembly 10. The second heat exchange medium that has completed the heat exchange with the outside air can continue to be introduced into the first heat exchange chamber 151 through the first inlet 122 and the second inlet 152 to complete the heat exchange cycle of the second heat exchange medium.

[0069] It should be noted that, in some embodiments, the first heat exchange medium after heat exchange with the heat exchange part 150 can only exchange heat with the speed change component, but not with the power component. In other embodiments, the first heat exchange medium after heat exchange with the heat exchange part 150 can simultaneously exchange heat with the power component and the speed change component. Exemplarily, in this embodiment, the first heat exchange medium in the drive cavity 111 and the speed change cavity 121 can communicate with each other, so that the first heat exchange medium after heat exchange with the heat exchange part 150 can simultaneously exchange heat with the power component and the speed change component in the housing assembly 10.

[0070] In the above heat exchange process, on the one hand, when the electric drive assembly with the shell assembly 10 needs to exchange heat, the first heat exchange medium in the shell assembly 10 can only move in the shell assembly 10, and the overall movement path of the first heat exchange medium is shorter, which can perform heat exchange more quickly and has higher heat exchange efficiency. On the other hand, in the prior art, the first heat exchange medium needs to be continuously introduced into and exported from the shell assembly. After long-term use, the first heat exchange medium is prone to leakage at the interface where the first heat exchange medium is introduced or exported from the shell assembly. In this solution, the first heat exchange medium can perform heat exchange on the power component and the speed change component only by moving inside the shell assembly 10, and the first heat exchange medium does not need to be exported from the shell assembly 10, which reduces the risk of leakage of the first heat exchange medium. On the third hand, in the prior art, the first heat exchange medium will have heat or cold loss in the process of exchanging heat with the heat exchanger outside the shell assembly and being guided back into the shell assembly. In this solution, the first heat exchange medium can always be in the shell assembly 10, and the first heat exchange medium will not have heat or cold loss. Fourthly, in the prior art, when the first heat exchange medium is exported from the shell assembly through the external pipe and performs heat exchange with the heat exchanger outside the heat exchange assembly, the first heat exchange medium in the shell assembly has a capacity loss (the lost first heat exchange medium is stored in the external pipe), that is, the capacity of the first heat exchange medium in the shell assembly becomes smaller. Therefore, in order to make the first heat exchange medium in the shell assembly within a suitable range, it is necessary to calculate the capacity of the first heat exchange medium in the external pipe in the early stage, and the capacity of the first heat exchange medium corresponding to different models of external pipes is different, which increases the design cost. In this solution, since the first heat exchange medium does not need to be exported from the shell assembly 10, the capacity of the first heat exchange medium in the shell assembly 10 is easier to control, which reduces the design cost. Fifthly, in the prior art, heat or cold is obtained only through the first heat exchange medium. In this solution, the shell assembly 10, the speed change component and the air in the speed change cavity 121 can absorb the heat or cold of the second heat exchange medium, and there are more heat exchange methods and higher heat exchange efficiency. In the sixth aspect, in the prior art, in order to realize the circulation of the first heat exchange medium in the shell assembly and the circulation of the first heat exchange medium outside the shell assembly, it is necessary to set up a first heat exchange medium circulation pipeline. In the present solution, the pipeline originally used to conduct the first heat exchange medium in the shell assembly 10 can be replaced with the heat exchange part 150, that is, the newly added heat exchange part 150 does not increase the overall size of the shell assembly 10 too much, so that the shell assembly 10 can achieve all the aforementioned effects without much change in size.

[0071] The specific structure of the shell body 100 depends on actual needs, and it only needs to define a driving cavity 111 that can accommodate the power component and can accommodate the heat exchange part 150 and the speed change component. Figure 1 as well as Figure 5In some embodiments, the housing body 100 includes a partition 130, a first shell 110, and a second shell 120. One side of the partition 130 and the first shell 110 together define a drive chamber 111, and the other side of the partition 130 and the second shell 120 together define a speed change chamber 121. The partition 130 is provided with a first through hole 1311 and a second through hole 1312, and the first through hole 1311 and the second through hole 1312 are connected to the drive chamber 111 and the speed change chamber 121 respectively. The first heat exchange medium in the speed change chamber 121 is suitable for entering the drive chamber 111 through the first through hole 1311, and the first heat exchange medium in the drive chamber 111 is suitable for entering the speed change chamber 121 through the second through hole 1312. In this embodiment, since the partition 130 is provided with a first through hole 1311 and a second through hole 1312 respectively penetrating the drive chamber 111 and the speed change chamber 121, the first heat exchange medium can circulate in the drive chamber 111 and the speed change chamber 121, thereby simultaneously exchanging heat for the power component and the speed change component. Specifically, the partition 130 may also include a third through hole 1313 respectively connecting the drive chamber 111 and the speed change chamber 121. When the power component is arranged in the drive chamber 111, the output shaft of the power component can extend into the speed change chamber 121 through the third through hole 1313 to connect the speed change component in the speed change chamber 121. When the power component is a motor, the stator of the motor is fixed to the side wall of the first housing 110 or the partition 130 facing the drive chamber 111. When the power component is a rotor, the first shell 110 can be a part of the stator. At this time, the first shell 110 and the magnetic component arranged in the first shell 110 together constitute a stator that cooperates with the rotor. The rotor is fixed to the first shell 110, and the rotor rotates relative to the first shell 110 when working. At this time, the partition 130 can also not have the first through hole 1311 and the second through hole 1312, and the first heat exchange medium only exchanges heat for the speed change component.

[0072] See also Figure 1The partition 130 includes a partition 131 located in the middle, a first annular flange 132 extending from the outer peripheral edge of the partition 131 toward the first housing 110, and a second annular flange 133 extending from the outer peripheral edge of the partition 131 toward the second housing 120. The first housing 110 is connected to the first annular flange 132, and the first housing 110, the first annular flange 132 and the partition 131 jointly define the driving chamber 111, and the second housing 120, the second annular flange 133 and the partition 131 jointly define the speed change chamber 121. The first through hole 1311 and the second through hole 1312 are both provided in the partition 131. In this embodiment, the first housing 110 and the second housing 120 are both housings with a concave cavity, the concave cavity defined by the first annular flange 132 and the partition 131 and the concave cavity of the first housing 110 are combined to form a driving cavity 111, and the concave cavity defined by the second annular flange 133 and the partition 131 and the concave cavity of the second housing 120 are combined to form a speed change cavity 121. In other embodiments, the first housing 110 may also be an end cover covering a port on a side of the first annular flange 132 away from the partition 131, and the second housing 120 may also be an end cover covering a port on a side of the second annular flange 133 away from the partition 131.

[0073] When the housing body 100 includes the first housing 110, the partition 130, and the second housing 120, the heat exchange portion 150 may be connected only to the partition 130, or may be connected only to the second housing 120, or may be connected to both the second housing 120 and the partition 130. Figure 1 , Figure 3 as well as Fig. 9 In this embodiment, the heat exchange portion 150 is only connected to the partition portion 130 , specifically connected to the wall surface of the partition plate 131 of the partition portion 130 which faces away from the first shell 110 .

[0074] In order to achieve heat exchange between the first heat exchange medium and the heat exchange part 150, in some embodiments, the heat exchange part 150 can be directly in contact with the first heat exchange medium in the speed change cavity 121. Specifically, the heat exchange part 150 can be partially immersed in the first heat exchange medium, or it can be completely immersed in the first heat exchange medium. When the heat exchange part 150 is completely immersed in the first heat exchange medium, the sealing requirements of the heat exchange part 150 are relatively high; when the heat exchange part 150 is partially immersed in the first heat exchange medium, only the first heat exchange medium around the heat exchange part 150 can be fully exchanged, and the heat exchange effect is not ideal. In view of this, see Figure 5-Figure 9In some embodiments, the housing assembly 10 further includes a driving portion 160 and a flow guide portion 140, the driving portion 160 includes a power output end, and the power output end and the flow guide portion 140 are both disposed in the speed change cavity 121. The flow guide portion 140 is used, on the one hand, to guide the first heat exchange medium in the speed change cavity 121 to the driving cavity 111 through the first through hole 1311, and on the other hand, to allow the first heat exchange medium to perform heat exchange with the heat exchange portion 150 before guiding the first heat exchange medium to the driving cavity 111. Specifically, the guide part 140 defines a second heat exchange chamber 141, one end of the second heat exchange chamber 141 is connected to the first through hole 1311, and the other end of the second heat exchange chamber 141 is connected to the speed change chamber 121 (the other end of the guide part 140 can be immersed in the first heat exchange medium in the speed change chamber 121), and the power output end is configured to drive the first heat exchange medium in the speed change chamber 121 to be introduced into the second heat exchange chamber 141, and drive the first heat exchange medium in the second heat exchange chamber 141 to be introduced into the driving chamber 111 through the first through hole 1311, and the first heat exchange medium entering the driving chamber 111 can flow back to the speed change chamber 121 through the second through hole 1312. The guide part 140 contacts the heat exchange part 150, so that the first heat exchange medium in the second heat exchange chamber 141 and the second heat exchange medium in the first heat exchange chamber 151 can exchange heat. In this solution, on the one hand, the heat exchange part 150 does not need to be completely immersed in the first heat exchange medium, thereby reducing the sealing requirements of the heat exchange part 150. On the other hand, the first heat exchange medium introduced into the guide part 140 can cyclically exchange heat with the heat exchange part 150. In theory, all the first heat exchange medium can exchange heat with the heat exchange part 150, and the heat exchange effect is better.

[0075] In some embodiments, the driving unit 160 may include a driving motor and driving blades (the driving blades are the aforementioned power output end). In this case, the driving motor may be connected to the outside of the housing assembly 10 (it may also be arranged inside the housing assembly 10 in other embodiments), and the driving shaft of the driving motor extends into the housing assembly 10 and is connected to the driving blades located inside the housing assembly 10. The driving blades are immersed in the first heat exchange medium and can drive the first heat exchange medium to be introduced into the guide portion 140. In another embodiment, the driving unit 160 may include an air pump and an air pipe, wherein the air pump is arranged outside the housing assembly 10, and the air pipe is arranged inside the housing assembly 10. In this case, the air pipe is the aforementioned power output end. Of course, the driving unit 160 may also be other structural forms, as long as it can introduce the first heat exchange medium into the guide portion 140, which will not be described in detail here.

[0076] When the housing assembly 10 includes the guide portion 140, the relative position relationship between the guide portion 140 and the heat exchange portion 150 can be determined according to actual needs, and the two only need to contact so that the second heat exchange medium in the first heat exchange cavity 151 can exchange heat with the first heat exchange medium in the second heat exchange cavity 141. In some embodiments, see Figure 3 , Figure 5as well as Fig. 9 , the guide part 140 is connected to the partition part 130, and the heat exchange part 150 is connected to the side of the guide part 140 away from the partition part 130. In this solution, on the one hand, the guide part 140 can be more conveniently connected to the first through hole 1311, so that the first heat exchange medium entering the guide part 140 can be more conveniently guided to the first through hole 1311. On the other hand, the heat exchange part 150 can be more conveniently connected to the first inlet 122 and the first outlet 123, and the external second heat exchange medium can be more conveniently introduced into and out of the heat exchange part 150. On the other hand, the structure in which the air guide 140 and the heat exchange part 150 are stacked in a direction perpendicular to the wall surface of the partition 131 facing the second shell 120 can better fit the flat internal space in the transmission chamber 121. Compared with the structure in which the air guide 140 and the heat exchange part 150 are stacked in a direction parallel to the wall surface of the partition 131 facing the second shell 120, the contact area between the air guide 140 and the heat exchange part 150 can be increased, thereby improving the heat exchange effect. It should be noted that when the heat exchange part 150 is connected to the side of the air guide 140 facing away from the partition 130, in some embodiments, the heat exchange part 150 can be fixed in position by connecting to the air guide 140. In other embodiments, see Figure 3 The heat exchange part 150 can also be fixed in position by being connected to the protrusion on the partition part 130 (specifically, being threadedly connected to the protrusion on the partition part 130). At this time, the heat exchange part 150 and the guide part 140 are in contact with each other, and there may be no other fixing structure between the two.

[0077] See also Figure 2-Figure 4In some embodiments, the first inlet 122 and the first outlet 123 are both disposed in the second housing 120, and the second inlet 152 and the second outlet 153 are both disposed on the side of the heat exchange part 150 away from the air guide part 140. Since the rotation axis direction of each gear in the gear speed change mechanism disposed in the speed change chamber 121 is generally parallel to the direction from the drive chamber 111 to the speed change chamber 121, the overall size of the speed change chamber 121 is generally small along the direction from the drive chamber 111 to the speed change chamber 121. Therefore, after the heat exchange part 150 and the air guide part 140 are stacked and arranged along the direction from the drive chamber 111 to the speed change chamber 121, the distance between the heat exchange part 150 and the second housing 120 is relatively small. Therefore, when the second inlet 152 and the second outlet 153 are both disposed on the side of the heat exchange part 150 away from the air guide part 140, the second heat exchange medium in the heat exchange part 150 can be more conveniently guided out of the speed change chamber 121. Further, in some embodiments, the side of the heat exchange part 150 away from the guide part 140 can abut against the wall of the first shell 110 facing the partition part 130, so that the second heat exchange medium can immediately enter the heat exchange part 150 through the second inlet 152 after passing through the first inlet 122 of the first shell 110, and no pipeline structure is required between the first inlet 122 and the second inlet 152. The second heat exchange medium in the heat exchange part 150 can immediately be discharged from the shell assembly 10 through the first outlet 123 after being discharged from the first heat exchange cavity 151 through the second outlet 153, and no pipeline structure is required between the first outlet 123 and the second outlet 153.

[0078] In some embodiments, the flow guide 140 may be a pipeline structure, that is, the flow guide 140 is an oil guide tube, one end of the oil guide tube is immersed in the first heat exchange medium, and the other end is connected to the first through hole 1311, and the middle part of the oil guide tube is in contact with the heat exchange part 150, so that the first heat exchange medium can exchange heat with the heat exchange part 150 before being introduced into the drive cavity 111. However, in the above structure, the second heat exchange medium of the heat exchange part 150 first exchanges heat with the heat exchange part 150, then the heat exchange part 150 exchanges heat with the oil guide tube, and finally the first heat exchange medium exchanges heat with the oil guide tube, that is, the first heat exchange medium needs to pass through the heat exchange part 150 and the oil guide tube as an intermediate medium to exchange heat with the second heat exchange medium, and the heat exchange efficiency is low. In view of this, see Figure 3 as well as Figure 9-10In some embodiments, an opening 1421 is provided on the side of the flow guide 140 away from the partition 130, and the heat exchange part 150 covers the opening 1421 of the flow guide 140, so that the side wall of the heat exchange part 150 facing the flow guide 140 and the flow guide 140 together define the second heat exchange chamber 141. In this scheme, the first heat exchange medium in the flow guide 140 can directly contact the heat exchange part 150 through the opening 1421, and the intermediate heat conduction medium between the flow guide 140 and the second heat exchange medium is only the flow guide 140, so the heat exchange efficiency of the two is improved. The area size of the opening 1421 of the flow guide 140 is determined according to actual needs. In some embodiments, the size of the opening 1421 can be made substantially equal to the overlapping area size of the heat exchange part 150 and the flow guide 140, so as to minimize the intermediate heat conduction medium between the first heat exchange medium and the second heat exchange medium, thereby improving the heat exchange efficiency.

[0079] See also Figure 9-10 In some embodiments, the air guide 140 is integrally connected to the partition 130. In this solution, since the air guide 140 and the partition 130 are integrally formed, there is no need to assemble the air guide 140 during the processing of the shell assembly 10. On the one hand, the number of parts of the shell assembly 10 is reduced, making the overall structure of the shell assembly 10 more compact; on the other hand, the assembly steps of the air guide 140 can be reduced, thereby improving the assembly efficiency. Furthermore, the heat exchange part 150 can be detachably connected to the partition 130, and the heat exchange part 150 abuts against the side of the air guide 140 away from the partition 130. In this solution, the pressure between the heat exchange part 150 and the air guide 140 can be increased during the process of connecting the heat exchange part 150 to the partition 130, so that when the heat exchange part 150 covers the opening 1421 of the air guide 140, the sealing effect between the heat exchange part 150 and the opening 1421 is better. Specifically, the heat exchange part 150 can be threadedly connected to the partition part 130, and the partition part 130 is used to connect the boss to the heat exchange part 150 and is spaced apart from the heat exchange part 150, so that in the process of connecting the partition part 130 and the boss by screws, the screws can drive the heat exchange part 150 to slightly deform in the direction close to the boss, so as to increase the pressure between the heat exchange part 150 and the guide part 140.

[0080] Figure 9-10In some embodiments, the guide portion 140 includes an annular protrusion 142 protruding from the wall surface of the partition portion 130 facing the speed change chamber 121, and the side of the annular protrusion 142 away from the partition portion 130 forms an opening 1421, and the heat exchange portion 150 covers the opening 1421, and the annular protrusion 142, the partition portion 130 and the heat exchange portion 150 jointly define the second heat exchange chamber 141. In this solution, on the one hand, the area of ​​the opening 1421 can be larger, so that the contact area between the first heat exchange medium in the second heat exchange chamber 141 and the heat exchange portion 150 can be larger. On the other hand, since the side wall connecting the guide portion 140 and the partition portion 130 is removed, and the partition portion 130 participates in defining the second heat exchange chamber 141, the size of the second heat exchange chamber 141 along the direction from the partition portion 130 to the second shell 120 is larger, the oil conduction amount of the guide portion 140 is increased, and the occupied space of the guide portion 140 is reduced. On the other hand, the annular protrusion 142 is used to define the second heat exchange cavity 141 , so that the partition 130 is easier to demold, thereby reducing the difficulty of molding the partition 130 .

[0081] In order to further increase the contact area between the heat exchange portion 150 and the flow guide portion 140, see Figure 3 as well as Figure 9-10 In some embodiments, the annular protrusion 142 has a first peripheral wall 145, and the heat exchange portion 150 has a second peripheral wall 157 arranged around the circumference of the annular protrusion 142. In the direction from the heat exchange portion 150 to the guide portion 140, the first peripheral wall 145 and the second peripheral wall 157 are arranged flush. In other words, the first projection plane is perpendicular to the direction from the heat exchange portion 150 to the guide portion 140, the positive projection of the first peripheral wall 145 on the first projection plane is the first projection, and the projection of the second peripheral wall 157 on the first projection plane is the second projection, and the first projection and the second projection are arranged to overlap. In this solution, the contact area between the heat exchange portion 150 and the guide portion 140 is the largest, so that the heat exchange efficiency between the first heat exchange medium and the second heat exchange medium is relatively the highest.

[0082] Figure 3 as well as Figure 9-10In some embodiments, the inner peripheral wall of the annular protrusion 142 includes a first inner wall and a second inner wall arranged opposite to each other, and the first inner wall and the second inner wall both extend along the flow direction of the first heat exchange medium in the guide part 140. The guide part 140 also includes a plurality of first ribs 146 and a plurality of second ribs 147, and each of the first ribs 146 and each of the second ribs 147 are arranged in the annular protrusion 142. The first ribs 146 and the second ribs 147 can support the heat exchange part 150, so that when the volume of the guide part 140 is large and the internal space of the second heat exchange cavity 141 is large, the heat exchange part 150 abutting against the guide part 140 will not be concave and deformed toward the second heat exchange cavity 141. Further, one end of each first rib 146 is connected to the first inner wall, and the other end is spaced from the second inner wall. One end of each second rib 147 is connected to the second inner wall, and the other end is spaced from the first inner wall. Along the flow direction of the first heat exchange medium in the second heat exchange chamber 141, the first ribs 146 and the second ribs 147 are alternately arranged one by one, and along the direction from the heat exchange portion 150 to the flow guide portion 140, one side of each first rib 146 and one side of each second rib 147 are connected to the partition portion 130, and the other side of each first rib 146 and second rib 147 are abutted against the heat exchange portion 150. In this solution, the first ribs 146 and the second ribs 147 not only play the role of supporting the heat exchange portion 150, but also play the role of separating the internal channel of the second heat exchange chamber 141. Each first rib plate 146 and each second rib plate 147 divides the internal space of the second heat exchange chamber 141 into a curved and extended channel, which can reduce the channel cross-sectional area in the second heat exchange chamber 141 and extend the channel length in the second heat exchange chamber 141 without changing the external dimensions of the guide portion 140, thereby reducing the flow rate of the first heat exchange medium and extending the residence time of the first heat exchange medium in the second heat exchange chamber 141, thereby improving the heat exchange effect of the guide portion 140.

[0083] See also Figure 5-Figure 6In order to prevent the heat exchange part 150 from being deformed due to the excessive space of the first heat exchange cavity 151, in some embodiments, a third rib 154 is further provided in the heat exchange part 150, and along the direction from the guide part 140 to the heat exchange part 150, the two ends of the third rib 154 respectively abut against the opposite two side walls of the first heat exchange cavity 151. Furthermore, the third rib 154 also extends along the flow direction of the second heat exchange medium in the first heat exchange cavity 151 to separate the internal space of the first heat exchange cavity 151 into two channels, and the two channels are connected to each other at one end close to the second inlet 152 and at one end close to the second outlet 153. In this solution, the second heat exchange medium in the two channels can exchange heat with the curved and extended first heat exchange medium in the guide part 140 relatively independently, so that the heat exchange process is gradient heat exchange rather than continuous heat exchange, thereby improving the heat exchange effect. Furthermore, when observing from the direction from the heat exchange portion 150 to the guide portion 140, the end of each first rib 146 facing away from the first connecting wall 143 overlaps with the third rib 154, and the end of each second rib 147 facing away from the second connecting wall 144 overlaps with the third rib 154, so that each first rib 146 and each second rib 147 can support the third rib 154. At the same time, the first heat exchange medium in the second heat exchange cavity 141 can exchange heat with the second heat exchange medium in the two channels in the first heat exchange cavity 151 in sequence during the bending circulation process, thereby improving the heat exchange efficiency.

[0084] See also Fig.12 In some embodiments, the flow direction of the second heat exchange medium in the first heat exchange cavity 151 is opposite to the flow direction of the first heat exchange medium in the second heat exchange cavity 141. For example, when the first heat exchange medium in the guide portion 140 flows from bottom to top, the second heat exchange medium in the heat exchange portion 150 can flow from top to bottom, so that the temperature difference between the first heat exchange medium and the second heat exchange medium can be relatively stable, so as to improve the heat exchange efficiency at various locations along the flow direction of the first heat exchange medium itself.

[0085] The arrangement positions of the heat exchange portion 150 and the guide portion 140 in the transmission cavity 121 depend on actual needs. Referring to the figure, in some embodiments, the partition portion 130 is provided with a first positioning hole 1314, and the second shell 120 is provided with a second positioning hole 124. The first positioning hole 1314 and the second positioning hole 124 are used to jointly position the output shaft of the electric drive assembly. Specifically, one end of the output shaft of the electric drive assembly is positioned at the first positioning hole 1314, and the other end is positioned at the second positioning hole 124. The output shaft of the electric drive assembly extends out of the second positioning hole 124 to output power to the outside. In this solution, the heat exchange part 150 is arranged around the hole axis of the first positioning hole 1314 and / or the second positioning hole 124. Specifically, the heat exchange part 150 can be arranged around the part of the output shaft located in the speed change chamber 121. On the one hand, the heat exchange part 150 can make good use of the remaining space around the output shaft to reduce the volume of the speed change chamber 121. On the other hand, the heat exchange part 150 can also exchange heat with the output shaft, thereby effectively preventing the heat of the external drive part 160 from being transferred to the speed change chamber 121 through the output shaft. When a gear is provided outside the output shaft, the heat exchange part 150 can also be arranged around the gear outside the output shaft (that is, the heat exchange part 150 is not arranged with the gear along the direction from the partition 130 to the second housing 120), thereby reducing the thickness dimension of the speed change chamber 121 along the direction from the partition 130 to the second housing 120. In some embodiments, the guide portion 140 may also be arranged around the hole axis of the first positioning hole 1314 and / or the second positioning hole 124. This solution has the same effect as the aforementioned solution and will not be described in detail here.

[0086] In some embodiments, along the direction from the second shell 120 to the partition 130, the coverage area of ​​the speed change cavity 121 is greater than the coverage area of ​​the drive cavity 111. Specifically, the second projection plane is perpendicular to the direction from the second shell 120 to the partition 130, the drive cavity 111 forms a third projection on the second projection plane, and the speed change cavity 121 forms a fourth projection on the projection plane, and the fourth projection is greater than the third projection. Further, along the direction from the second shell 120 to the partition 130, the heat exchange part 150 at least partially does not overlap with the drive cavity 111. In this solution, the heat exchange part 150 can avoid the speed change component connected to the output shaft of the power component in the speed change cavity 121, so as to more reasonably utilize the internal space of the speed change cavity 121. In order to facilitate the arrangement position of the heat exchange part 150, in some embodiments, along the direction from the second shell 120 to the partition 130, the guide part 140 at least partially does not overlap with the drive cavity 111.

[0087] The heat exchange part 150 can use a variety of methods to import and export the second heat exchange medium. In some embodiments, a guide pipe can be connected between the first inlet 122 and the second inlet 152, and the second heat exchange medium flows into the first heat exchange cavity 151 through the guide pipe. A guide pipe can be connected between the first outlet 123 and the second outlet 153, and the second heat exchange medium flows out of the first heat exchange cavity 151 through the guide pipe. In this solution, the position arrangement of the heat exchange part 150 is more flexible. Figure 2-Figure 4 In some embodiments, the first inlet 122 is provided on the outer wall of the second shell 120, the outer wall of the second shell 120 is connected to the first conduit 125, the first conduit 125 is connected to the first inlet 122, the heat exchange unit 150 is connected to the second conduit 155, the second conduit 155 is connected to the second inlet 152, and the second conduit 155 is inserted into the first conduit 125. The pipeline for externally conducting the second heat exchange medium can be sleeved outside the first conduit 125, so as to guide the second heat exchange medium to the first heat exchange cavity 151. The first outlet 123 is provided on the outer wall of the second shell 120, the outer wall of the second shell 120 is connected to the third conduit 126, the third conduit 126 is connected to the first outlet 123, the heat exchange unit 150 is connected to the fourth conduit 156, the fourth conduit 156 is connected to the second outlet 153, and the fourth conduit 156 is inserted into the third conduit 126. The pipeline for externally conducting the second heat exchange medium can be sleeved outside the third conduit 126, so as to guide the second heat exchange medium in the first heat exchange cavity 151 out. In this solution, not only can the second heat exchange medium be easily introduced into and discharged from the second heat exchange chamber 141 , but also the second conduit 155 and the fourth conduit 156 are assembled in the second shell 120 , thereby improving the assembly stability of the heat exchange part 150 .

[0088] In all the above-mentioned embodiments of the housing assembly 10, the heat exchange portion 150 is disposed in the speed change chamber 121. Fig.12In some embodiments, the heat exchange portion 150 may also be disposed outside the speed change cavity 121. Specifically, in this embodiment, the second shell includes a connecting side wall 127, and the connecting side wall 127 includes an inner wall facing the speed change cavity 121 and an outer wall away from the speed change cavity 121. The heat exchange portion 150 is connected to the outer wall of the connecting side wall 127, and the heat exchange portion 150 and the outer wall of the connecting side wall 127 jointly define a first heat exchange cavity 151. The flow guide portion 140 is connected to the inner wall of the connecting side wall 127, and the flow guide portion 140 and the inner wall of the connecting side wall 127 jointly define a second heat exchange cavity 141. Along the wall thickness direction of the connecting side wall 127, the first heat exchange cavity 151 and the second heat exchange cavity 141 at least partially overlap. In this solution, the flow guide 140 and the heat exchange part 150 are respectively located on opposite sides of the connecting side wall 127 of the second shell 120, and the second heat exchange medium in the first heat exchange cavity 151 and the first heat exchange medium in the second heat exchange cavity 141 are used as heat exchange medium through the connecting side wall 127. Since the second heat exchange medium does not need to be introduced into the shell body 100, the second heat exchange medium is not easy to leak during the process of being introduced into or out of the shell body 100. At the same time, since the heat exchange part 150 does not need to be assembled into the shell body 100, the assembly of the heat exchange part 150 is more flexible, and it can be assembled before the second shell 120 (the heat exchange part 150 can be assembled to the second shell 120 before the second shell 120 and the partition 130 are assembled), or it can be assembled after the second shell 120. In addition, since the heat exchange part 150 is arranged outside the shell body 100, when the heat exchange part 150 fails or the second heat exchange medium needs to be replaced, it can be more convenient to repair the heat exchange part 150. When repairing the heat exchange unit 150 , it can be directly disassembled from the shell body 100 without disassembling the second shell 120 .

[0089] In the above embodiment, the specific structures of the air guide 140 and the heat exchange part 150 can refer to the above embodiment. Specifically, the air guide 140 can be a cover plate with a concave cavity, and the cover is set on the inner wall of the connecting side wall 127 to define the second heat exchange cavity 141. The heat exchange part 150 can also be a cover plate with a concave cavity, and the cover is set on the outer wall of the connecting side wall 127 to define the first heat exchange cavity 151. In a further embodiment, the area of ​​the wall surface of the connecting side wall 127 that participates in defining the first heat exchange cavity 151 can be equal to the area of ​​the wall surface that participates in defining the second heat exchange cavity 141, and the wall surface of the connecting side wall 127 that participates in defining the first heat exchange cavity 151 and the wall surface of the connecting side wall 127 that participates in defining the second heat exchange cavity 141 completely overlap along the thickness direction of the connecting side wall 127.

[0090] The second aspect of the present application also provides an electric drive assembly, which includes the housing assembly 10 in any of the above embodiments, and the electric drive assembly also includes a power component and a speed change component. The power component is arranged in the drive cavity 111, and the power component can specifically be a motor. The power component includes a stator and a rotor. The stator is fixed to the housing assembly 10, and the rotor can rotate relative to the rotor. The rotor includes an output shaft, and the output shaft of the rotor extends into the speed change cavity 121. The speed change component is arranged in the speed change cavity 121, and the speed change assembly is connected to the output shaft of the rotor and is driven by the rotor. The speed change component is used to increase or decrease the speed of the rotor and then output the power of the rotor. The first heat exchange medium is arranged in the drive cavity 111 and the speed change cavity 121.

[0091] In some embodiments, the electric drive assembly further includes a heat exchanger and a heat exchange pipeline. The heat exchange pipeline is connected to the heat exchanger and the heat exchange part 150 respectively, and the heat exchange pipeline is used to guide the second heat exchange medium in the heat exchange part 150 to the heat exchanger and guide the second heat exchange medium in the heat exchanger to the heat exchange part 150. Specifically, the heat exchanger can be used to exchange heat with air. For example, in some embodiments, the heat exchanger may include a copper tube, a fin, and an air supply assembly. The fin is connected to the copper tube, one end of the copper tube is connected to the heat exchange pipeline connected to the first inlet 122, and the other end of the copper tube is connected to the heat exchange pipeline connected to the first outlet 123. The second heat exchange medium flows through the copper tube, the heat exchange pipeline, the heat exchange part 150, the heat exchange pipeline and the copper tube in sequence, thereby forming a complete heat exchange cycle. The second heat exchange medium exchanges heat with the copper tube, the copper tube exchanges heat with the fin and the air, and the fin exchanges heat with the air. The air supply assembly is used to guide the airflow to the copper tube and the fin, thereby improving the heat exchange efficiency between the copper tube and the fin. In this embodiment, the second heat exchange medium is water. In other embodiments, the second heat exchange medium can be any known form of medium for heat exchange. For example, the second heat exchange medium can be any one of inorganic compound refrigerants, Freon, saturated hydrocarbon refrigerants, unsaturated hydrocarbon refrigerants and azeotropic mixture refrigerants.

[0092] In the working state of the electric drive assembly, the first heat exchange medium is located below the drive cavity 111 and the heat exchange cavity. In order to realize the circulation of the first heat exchange medium between the drive cavity 111 and the heat exchange cavity, the second through hole 1312 can be arranged below the partition 130 and immersed in the position of the first heat exchange medium. In order to enable the first heat exchange medium in the drive cavity 111 and the speed change cavity 121 to realize the cold and hot cycle, the first through hole 1311 can be arranged above the partition 130 and located above the first heat exchange medium. The lower end of the guide part 140 is immersed in the first heat exchange medium, and the upper end of the guide part 140 is connected to the first through hole 1311, so that the guide part 140 can introduce the first heat exchange medium that has not been heat exchanged into the second heat exchange cavity 141 for heat exchange and then introduce it into the drive cavity 111 through the first through hole 1311. Further, in order to improve the heat exchange capacity of the heat exchange part 150, in some embodiments, the lower part of the heat exchange part 150 is immersed in the first heat exchange medium, and the upper part extends out of the first heat exchange medium. In this way, the heat exchange part 150 can not only exchange heat with the first heat exchange medium in the guide part 140, but also can exchange heat with the first heat exchange medium at the lower end of the speed change chamber 121, so that the second heat exchange medium in the heat exchange part 150 can be fully heat exchanged.

[0093] See also Figure 2-Figure 4 In some embodiments, when the electric drive assembly is in working state, the vertical height of the first inlet 122 is higher than the vertical height of the first outlet 123, and the vertical height of the second inlet 152 is higher than the vertical height of the second outlet 153. On the one hand, it is convenient to achieve the purpose of making the flow direction of the second heat exchange medium in the first heat exchange chamber 151 opposite to the flow direction of the first heat exchange medium in the second heat exchange chamber 141; on the other hand, when there is residual cold or residual heat after the second heat exchange medium in the heat exchange part 150 exchanges heat with the first heat exchange medium in the liquid guiding part, since the lower end of the heat exchange part 150 is immersed in the first heat exchange medium, the second heat exchange medium in the heat exchange part 150 can also exchange heat with the first heat exchange medium located below in the speed change chamber 121, thereby fully absorbing the residual cold or residual heat of the second heat exchange medium. In other embodiments, when the electric drive assembly is in working state, the vertical height of the first inlet 122 may also be lower than the vertical height of the first outlet 123, and the vertical height of the second inlet 152 may also be lower than the vertical height of the second outlet 153, so that the flow direction of the second heat exchange medium in the first heat exchange chamber 151 is the same as the flow direction of the first heat exchange medium in the second heat exchange chamber 141.

[0094] The third aspect of the present application also provides a vehicle, which includes any of the above-mentioned electric drive assemblies. Specifically, the vehicle can be a private car, such as a sedan, SUV, MPV or pickup truck. The vehicle can also be an operating vehicle, such as a van, bus, small truck or large trailer. The vehicle can be a gasoline vehicle or a new energy vehicle. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0095] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0096] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0097] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A housing assembly for an electric drive assembly, the electric drive assembly comprising a power component and a speed change component disposed in the housing assembly, It is characterized in that The housing assembly comprises: A partition portion, provided with a first through hole and a second through hole; A first housing, which together with one side of the partition defines a driving cavity suitable for accommodating the power component; A second housing, together with the other side of the partition, defines a speed change chamber suitable for accommodating the speed change component, wherein the speed change chamber is suitable for accommodating a first heat exchange medium; A guide portion, disposed in the speed-changing chamber, wherein one end of the guide portion is connected to the first through hole, and the other end of the guide portion is connected to the speed-changing chamber; A heat exchange part, adapted to flow a second heat exchange medium, the heat exchange part being used to perform heat exchange with the flow guide part; The first heat exchange medium in the speed change cavity is suitable for entering the guide portion and entering the driving cavity through the first through hole, and the first heat exchange medium in the driving cavity is suitable for being introduced into the speed change cavity through the second through hole.

2. The housing assembly according to claim 1, It is characterized in that The heat exchange part is arranged in the speed change chamber, and the flow guide part is in contact with the heat exchange part; The second housing is provided with a first inlet and a first outlet communicating with the speed change chamber, the heat exchange portion defines a first heat exchange chamber, one side of the heat exchange portion is provided with a second inlet respectively communicating with the first inlet and the first heat exchange chamber, and the other side of the heat exchange portion is provided with a second outlet respectively communicating with the first outlet and the first heat exchange chamber; The second heat exchange medium is suitable for entering the first heat exchange chamber through the first inlet and the second inlet, and is suitable for flowing out of the first heat exchange chamber through the first outlet and the second outlet.

3. The housing assembly according to claim 2, It is characterized in that The air guide portion is integrally connected to the partition portion, the heat exchange portion is detachably connected to the partition portion, and the heat exchange portion abuts against a side of the air guide portion away from the partition portion.

4. The housing assembly according to claim 3, It is characterized in that An opening is provided on one side of the flow guide portion away from the partition portion, and the heat exchange portion covers the opening, so that the side wall of the heat exchange portion facing the flow guide portion and the flow guide portion together define a second heat exchange cavity for conducting the first heat exchange medium.

5. The housing assembly according to claim 4, It is characterized in that The guide portion includes an annular protrusion protruding from the wall surface of the partition portion facing the speed change cavity, the opening is formed on the side of the annular protrusion away from the partition portion, and the annular protrusion, the partition portion and the heat exchange portion jointly define the second heat exchange cavity.

6. The housing assembly according to claim 5, It is characterized in that The annular protrusion has a first outer peripheral wall, the heat exchange portion has a second outer peripheral wall arranged around the circumference of the annular protrusion, and the first outer peripheral wall is arranged flush with the second outer peripheral wall along the direction from the heat exchange portion to the guide portion.

7. The housing assembly according to claim 5, It is characterized in that The inner circumferential wall of the annular protrusion includes a first inner wall and a second inner wall which are arranged opposite to each other. The guide portion also includes a plurality of first ribs and a plurality of second ribs. One end of each of the first ribs is connected to the first inner wall, and the other end is spaced from the second inner wall. One end of each of the second ribs is connected to the second inner wall, and the other end is spaced from the first inner wall. Along the flow direction of the first heat exchange medium in the second heat exchange cavity, the first ribs and the second ribs are alternately arranged one by one. Along the direction from the heat exchange portion to the guide portion, one side of each of the first ribs and the second ribs are connected to the partition portion, and the other side abuts the heat exchange portion.

8. The housing assembly according to claim 2, It is characterized in that A flow direction of the second heat exchange medium in the heat exchange portion is opposite to a flow direction of the first heat exchange medium in the flow guide portion.

9. The housing assembly according to claim 1, It is characterized in that The partition is provided with a first positioning hole, and the second housing is provided with a second positioning hole, and the first positioning hole and the second positioning hole are used to jointly position the output shaft of the electric drive assembly; The guide portion is arranged around a hole axis of the first positioning hole and / or the second positioning hole.

10. The housing assembly according to claim 1, It is characterized in that Along the direction from the second shell to the partition, the guide portion at least partially does not overlap with the driving cavity.

11. The housing assembly according to claim 1, It is characterized in that The second housing includes a connecting side wall, wherein the connecting side wall includes an inner wall facing the speed change chamber and an outer wall facing away from the speed change chamber; The heat exchange part is connected to the outer wall of the connecting side wall, and the heat exchange part and the outer wall of the connecting side wall jointly define a first heat exchange cavity; the flow guide part is connected to the inner wall of the connecting side wall, and the flow guide part and the inner wall of the connecting side wall jointly define a second heat exchange cavity; Along the wall thickness direction of the connecting side wall, the first heat exchange cavity and the second heat exchange cavity at least partially overlap.

12. An electric drive assembly, It is characterized in that include: The housing assembly according to any one of claims 1 to 11; The power component is arranged in the driving cavity; The speed change component is arranged in the speed change cavity and is driven by the power component.

13. The electric drive assembly according to claim 12, It is characterized in that The electric drive assembly also includes a heat exchanger and a heat exchange pipeline, the heat exchange pipeline is connected to the heat exchanger and the heat exchange part respectively, and the heat exchange pipeline is used to guide the second heat exchange medium in the heat exchange part to the heat exchanger and guide the second heat exchange medium in the heat exchanger to the heat exchange part.

14. The electric drive assembly according to claim 12, It is characterized in that The lower portion of the guide part is immersed in the first heat exchange medium, and the upper portion thereof is extended out of the first heat exchange medium.

15. A vehicle, It is characterized in that Comprising the electric drive assembly as described in any one of claims 12-14.

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