Motor housing, motor and motor system

Abstract

The utility model discloses a motor casing, motor and motor system. Motor casing includes casing main body, first cover and second cover, and casing main body includes casing bottom plate and the casing side plate of ring setting in the outer circumferential side of casing bottom plate, and first cover is located at the second side of casing bottom plate, and with casing bottom plate and casing side plate together enclose and form with first cooling cavity, and first cooling cavity is provided with the first import and first export of intercommunication, and first export is connected with installation cavity intercommunication, and second cover is located at the first side of casing bottom plate, and with casing bottom plate and casing side plate together enclose and form with second cooling cavity, and second cooling cavity is provided with the second import and second export of intercommunication, and installation cavity is located at the side of second cover away from casing bottom plate, and at least one of first cover and second cover is arranged as the heat dissipation board. The utility model makes the condition of occupying space smaller, and heat exchange efficiency is higher, can better guarantee that the coolant keeps at lower temperature, and the cooling efficiency of stator assembly and rotor is also higher.

Description

Technical Field

[0001] This utility model relates to the technical field of electric motors, specifically to an electric motor housing, an electric motor, and an electric motor system. Background Technology

[0002] During normal operation, the motor's internal coils generate copper losses, the stator core generates iron losses, and the rotor generates eddy current losses in the permanent magnets. These losses are converted into heat. When the motor's heat dissipation capacity is insufficient, the motor temperature will become too high. This heat will cause a decrease in the magnetic performance of the permanent magnets, affecting the motor's continuous torque. Traditional motors incorporate cooling structures internally. For example, a stator cooling structure is located on at least one side of the stator assembly, and a cooling structure is located at the end or axial side of the rotor, allowing both the stator assembly and the rotor to be cooled. However, this approach makes the layout of the internal cooling structures complex and requires a large number of cooling structures, resulting in a larger internal space and a larger overall motor size. Utility Model Content

[0003] To address the aforementioned technical problems, the main objective of this utility model is to provide a motor housing, a motor, and a motor system. This aims to solve the problem that traditional motor cooling methods result in complex internal structures, large space requirements, and consequently, large motor sizes.

[0004] To achieve the above objectives, the present invention provides a motor housing comprising:

[0005] The shell body includes a shell bottom plate and shell side plates arranged around the outer periphery of the shell bottom plate. The shell bottom plate has a first side and a second side arranged opposite to each other along its axial direction. The shell side plates and the first side of the shell bottom plate form a mounting cavity suitable for accommodating a stator assembly and / or a rotor.

[0006] A first cover plate is disposed on the second side of the shell bottom plate and together with the shell bottom plate and the shell side plate forms a first cooling cavity. The first cooling cavity has a first inlet and a first outlet that are connected to each other. The first inlet is adapted to communicate with the outside, and the first outlet is connected to the mounting cavity.

[0007] The second cover plate is disposed on the first side of the shell bottom plate and together with the shell bottom plate and the shell side plate, forms a second cooling cavity. The second cooling cavity has a second inlet and a second outlet that are connected to each other. The second inlet and the second outlet are both adapted to communicate with the outside. The mounting cavity is located on the side of the second cover plate that faces away from the shell bottom plate.

[0008] In this embodiment, at least one of the first cover plate and the second cover plate is configured as a heat dissipation plate.

[0009] Optionally, the first inlet is disposed on the side plate of the shell, and a first channel is formed on the bottom plate of the shell to connect the first outlet and the mounting cavity. The first channel extends axially along the bottom plate of the shell and is disposed near the middle of the bottom plate of the shell.

[0010] Optionally, the bottom plate of the shell has an inner ring portion extending axially along the bottom plate in the middle. One axial end of the inner ring portion abuts against the first cover plate, and the other axial end of the inner ring portion protrudes from the second cover plate and extends into the mounting cavity. The stator assembly is adapted to surround the outer periphery of the inner ring portion, and at least a portion of the first channel is provided on the inner ring portion.

[0011] Optionally, the first channel has a spray port formed at the end of the mounting cavity, the spray port being adapted to be positioned toward the axial end face of the rotor.

[0012] Optionally, the bottom plate of the shell protrudes from one side toward the first cover plate and is provided with a plurality of annular ribs, the plurality of annular ribs abutting against the first cover plate, the plurality of annular ribs being nested in sequence and all surrounding the outer periphery of the inner ring portion;

[0013] At least one connection is provided between each pair of adjacent annular ribs, with the first inlet located outside the outermost annular rib and the first outlet located inside the innermost annular rib.

[0014] Optionally, a connecting opening is provided between each pair of adjacent annular ribs, and the connecting openings on the two adjacent annular ribs are respectively located on opposite sides of the annular ribs in the radial direction.

[0015] Optionally, the bottom plate of the shell protrudes from the side facing the second cover plate and is provided with a plurality of guide ribs. The plurality of guide ribs are arranged radially with the inner ring as the center and all abut against the second cover plate.

[0016] The second inlet and the second outlet are respectively located on both sides of one of the guide ribs along the circumference of the inner ring portion. Each of the remaining guide ribs is provided with at least one notch, and the multiple notches are connected to form a guide channel. The two ends of the guide channel are respectively connected to the second inlet and the second outlet.

[0017] This utility model also provides a motor, comprising:

[0018] The aforementioned motor housing;

[0019] The stator assembly is disposed within the mounting cavity of the motor housing and surrounds the outer periphery of the inner ring portion of the motor housing;

[0020] The rotor is located on the side of the stator assembly facing away from the second cover plate of the motor housing;

[0021] The coolant flowing out of the first cooling chamber of the motor housing can flow from the first outlet to the rotor.

[0022] Optionally, the stator assembly includes a plurality of stator cores and a plurality of stator windings wound around the outer periphery of the plurality of stator cores in a corresponding manner. The plurality of stator cores are arranged circumferentially at intervals along the inner ring of the motor housing. The outer periphery of the inner ring is provided with a first channel connecting the first cooling cavity and the mounting cavity. The first channel is provided in the area between two adjacent stator windings.

[0023] This utility model also provides a motor system, including:

[0024] The aforementioned motor has an oil outlet on one side, which is connected to the mounting cavity;

[0025] An oil supply device, one end of which is connected to the first inlet and the other end of which is connected to the oil outlet;

[0026] A water supply device, one end of which is connected to the second inlet and the other end of which is connected to the second outlet.

[0027] The technical solution provided by this utility model has the following beneficial effects:

[0028] The motor housing provided by this utility model includes a housing body, a first cover plate, and a second cover plate. The housing body includes a housing bottom plate and a housing side plate. The housing side plate is arranged circumferentially around the housing bottom plate to form a mounting cavity on the first side of the housing side plate and the housing bottom plate. The stator assembly and / or rotor can be accommodated in the mounting cavity. The first cover plate is disposed on the second side of the housing bottom plate to form a first cooling cavity on the first side of the housing bottom plate. External coolant can enter the first cooling cavity from the first inlet and then flow out of the first cooling cavity through the first outlet to enter the mounting cavity, thereby cooling the rotor in the mounting cavity. The second cover plate is disposed on the first side of the housing bottom plate to form a second cooling cavity on the first side of the housing bottom plate. External coolant can enter the second cooling cavity through the second inlet and flow out of the second cooling cavity through the second outlet, forming a cooling flow path in the second cooling cavity, thereby cooling the stator assembly disposed close to the second cooling cavity. By integrating both the first and second cooling chambers onto the motor housing and placing them on the same side of the stator assembly, less internal space is required in the motor housing, while simultaneously cooling both the stator assembly and the rotor, thus ensuring better cooling performance of the motor. Furthermore, at least one of the first and second cover plates is configured as a heat dissipation plate, which can dissipate heat from the coolant in the first and / or second cooling chambers, resulting in higher heat exchange efficiency and better maintaining the coolant at a lower temperature, thereby further enhancing the cooling efficiency of the stator assembly and rotor. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of an embodiment of a motor housing provided by this utility model;

[0031] Figure 2 for Figure 1 A cross-sectional structural diagram of the motor housing (at the first cooling chamber) described above;

[0032] Figure 3 for Figure 1 A cross-sectional structural diagram of the motor housing (at the second cooling chamber) described above;

[0033] Figure 4 A schematic diagram of the structure of an embodiment of an electric motor provided by this utility model;

[0034] Figure 5 for Figure 4 A cross-sectional structural diagram of the motor described herein.

[0035] Explanation of icon numbers:

[0036] 1000-Motor; 100-Motor housing; 1-Housing body; 11-Housing bottom plate; 111-Annular rib; 112-Connecting opening; 113-Guide rib; 114-Notch; 12-Housing side plate; 13-Inner ring; 14-First channel; 141-Injection nozzle; 15-First cover plate; 151-First cooling chamber; 152-First inlet; 153-First outlet; 16-Second cover plate; 161-Second cooling chamber; 162-Second inlet; 163-Second outlet; 200-Stator assembly; 201-Stator core; 202-Stator winding.

[0037] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] This utility model provides a motor housing 100, a motor 1000, and a motor system. Figures 1 to 5Embodiments of the motor housing 100 and motor 1000 provided by this utility model.

[0042] Specifically, please refer to Figure 1 , Figure 2 and Figure 5 In this embodiment, the motor housing 100 includes a housing body 1, a first cover plate 15, and a second cover plate 16. The housing body 1 includes a housing bottom plate 11 and a housing side plate 12 arranged around the outer periphery of the housing bottom plate 11. The housing bottom plate 11 has a first side and a second side arranged opposite to each other along its axial direction. The housing side plate 12 and the first side of the housing bottom plate 11 form a mounting cavity suitable for accommodating the stator assembly 200 and / or the rotor. The first cover plate 15 is disposed on the second side of the housing bottom plate 11 and together with the housing bottom plate 11 and the housing side plate 12, forms a first cooling cavity 151. The first cooling cavity 151 has a first inlet 152 and a first outlet 153 that are connected. The first inlet 152 is suitable for communicating with the outside, and the first outlet 153 is connected to the mounting cavity. The second cover plate 16 is disposed on the first side of the bottom plate 11 and together with the bottom plate 11 and the side plate 12 forms a second cooling cavity 161. The second cooling cavity 161 has a connected second inlet 162 and a second outlet 163, both of which are adapted to communicate with the outside. The mounting cavity is located on the side of the second cover plate 16 facing away from the bottom plate 11. At least one of the first cover plate 15 and the second cover plate 16 is configured as a heat dissipation plate.

[0043] In this embodiment, a first cover plate 15 is disposed on the second side of the bottom plate 11 to form a first cooling chamber 151 on the first side of the bottom plate 11. External coolant can enter the first cooling chamber 151 through the first inlet 152 and then flow out of the first cooling chamber 151 through the first outlet 153 to enter the mounting cavity, thereby cooling the rotor in the housing cavity. A second cover plate 16 is disposed on the first side of the bottom plate 11 to form a second cooling chamber 161 on the first side of the bottom plate 11. External coolant can enter the second cooling chamber 161 through the second inlet 162 and flow out of the second cooling chamber 161 through the second outlet 163, forming a cooling flow path in the second cooling chamber 161, thereby cooling the stator assembly 200 disposed close to the second cooling chamber 161. By integrating both the first cooling chamber 151 and the second cooling chamber 161 onto the motor housing 100 and placing them on the same side of the stator assembly 200, the internal space occupied by the motor housing 100 is reduced, while simultaneously cooling both the stator assembly 200 and the rotor, thus better ensuring the cooling effect of the motor 1000. Furthermore, at least one of the first cover plate 15 and the second cover plate 16 is configured as a heat dissipation plate, which can dissipate heat from the coolant in the first cooling chamber 151 and / or the second cooling chamber 161, resulting in higher heat exchange efficiency and better ensuring that the coolant is kept at a lower temperature, thereby further improving the cooling efficiency of the stator assembly 200 and the rotor.

[0044] The first cover plate 15 and the second cover plate 16 can be welded to the main housing. Alternatively, the first cover plate 15 and the second cover plate 16 can be connected by screws or bolts or other fasteners, making it easy to assemble and disassemble the first cover plate 15 and the second cover plate 16.

[0045] The bottom plate 11 is generally disc-shaped, with the first side and the second side respectively formed on its axial sides. The side plate 12 is generally annular, surrounding the outer periphery of the bottom plate 11, and protruding from the bottom plate 11 at least on one axial side. Preferably, the side plate 12 protrudes from the bottom plate 11 on both axial sides. The first side of the bottom plate 11 is adapted to accommodate the stator assembly 200 and the rotor, closer to the inner side of the motor housing 100. The second side of the bottom plate 11 is closer to the outer side of the motor housing 100. The first cover plate 15 and the second cover plate 16 are also generally disc-shaped, respectively spaced apart on both sides of the bottom plate 11, thereby forming a first cooling chamber 151 and a second cooling chamber 161 between them for coolant to enter. Along the axial direction of the motor housing 100 and from the outside to the inside, the first cover plate 15, the bottom plate 11, the second cover plate 16, the stator assembly 200 and the rotor are arranged in sequence.

[0046] Since the rotor is located inside the stator assembly 200 and far from the first cooling chamber 151 and the second cooling chamber 161, when cooling the rotor, the coolant needs to be transported from the outside of the bottom plate 11 towards the inside of the bottom plate 11 to the rotor. Specifically, in conjunction with Figure 1 and Figure 2 As shown, the first inlet 152 is located on the side plate 12 of the housing, on the peripheral side of the motor housing 100. A first channel 14 is formed on the bottom plate 11 of the housing, connecting the first outlet 153 and the mounting cavity. The first channel 14 extends axially along the bottom plate 11 and is located near the center of the bottom plate 11. The first outlet 153 is adapted to be connected to an oil supply device, which supplies external cooling oil into the first cooling chamber 151, then flows along the first cooling chamber 151 to the first outlet 153, and then through the first channel 14 to the mounting cavity to cool the rotor. The first channel 14 allows the cooling oil located on the outside of the bottom plate 11 to flow axially toward the inside of the bottom plate 11, toward the center of the motor housing 100, thereby better guiding the cooling oil to the rotor and achieving rotor cooling. The first cooling chamber 151 is integrated into the housing body 1, and at least a portion of the cavity wall of the first cooling chamber 151 is shared with the housing body 1. This effectively reduces the space occupied by the first cooling chamber 151, making the structure more compact. Moreover, even when the first cooling chamber 151 is far from the rotor, the cooling oil can still be better delivered to the rotor, ensuring a better cooling effect.

[0047] It is understood that, in one embodiment, the first channel 14 may be formed on a separate guide member, which is connected to the first cooling chamber 151 to guide the cooling oil in the first cooling chamber 151 toward the rotor.

[0048] Preferably, the first channel 14 is integrated into the shell body 1. Specifically, in conjunction with Figure 4 and Figure 5 As shown, an inner ring portion 13 is provided in the middle of the bottom plate 11, extending axially along the bottom plate 11. The inner ring portion 13 is cylindrical with openings at both ends. One axial end of the inner ring portion 13 abuts against the first cover plate 15, and the other axial end of the inner ring portion 13 protrudes from the second cover plate 16 and extends into the mounting cavity. The stator assembly 200 is adapted to surround the outer periphery of the inner ring portion 13. At least a portion of the first channel 14 is provided on the inner ring portion 13, so as to be located closer to the middle of the housing body 1 and not occupy the radial space of the stator assembly 200, thus making the radial dimension of the housing body 1 smaller. The inner side of the inner ring portion 13 is adapted to accommodate bearings, so that the rotating shaft of the motor 1000 can be mounted on the motor housing 100 through the bearings. The first cooling cavity 151 and the second cooling cavity 161 are both arranged around the outer periphery of the inner ring portion 13. The bottom plate 11 forms a cavity wall shared by the first cooling cavity 151 and the second cooling cavity 161. The distance between the first cooling cavity 151 and the second cooling cavity 161 is closer and the arrangement is more compact, thereby making the overall volume of the motor housing 100 smaller.

[0049] Furthermore, combined again Figure 4 and Figure 5 As shown, the first channel 14 has a spray nozzle 141 formed at the end of the mounting cavity, and the spray nozzle 141 is adapted to be positioned toward the axial end face of the rotor. The first channel 14 extends along the extending direction of the inner ring portion 13, and the inner ring portion 13 faces the end face of the rotor to form the end face of the first channel 14. The spray nozzle 141 is located on the end face of the first channel 14, and the cooling oil sprayed from the spray nozzle 141 can be sprayed onto the axial end face of the rotor. Since the first channel 14 is located near the middle of the bottom plate 11, the spray nozzle 141 is positioned corresponding to the middle region of the rotor. When the rotor rotates at high speed, the cooling oil will flow from the center of the rotor end face to the edge region under the action of centrifugal force, so that cooling oil can be distributed throughout the entire rotor, thereby cooling the rotor and improving the cooling effect of the rotor.

[0050] Moreover, since the volume of the first cooling chamber 151 is larger than that of the first channel 14, when the cooling oil in the first cooling chamber 151 enters the first channel 14 through the first outlet 153, the flow path of the cooling oil will suddenly narrow, which will increase the flow rate of the cooling oil after entering the first channel 14. The speed of the coolant sprayed from the spray nozzle 141 is faster, thus ensuring that the cooling oil can be sprayed onto the rotor and ensuring the cooling effect of the rotor.

[0051] Since the first inlet 152 is located on the circumferential side of the first cooling chamber 151, and the first outlet 153 is located at the center of the bottom plate 11, a guide component is provided in the first cooling chamber 151 to guide the cooling oil, so that the cooling oil can be stably and uniformly guided towards the first outlet 153. Preferably, a plurality of annular ribs 111 protrude from the side of the bottom plate 11 facing the first cover plate 15, and the plurality of annular ribs 111 abut against the first cover plate 15 to form a flow channel for the cooling oil to flow. The plurality of annular ribs 111 are nested in sequence and are all arranged around the outer periphery of the inner ring portion 13. The plurality of annular ribs 111 are arranged in a generally concentric circle and are equally spaced along the radial direction of the bottom plate 11, and the interval between the plurality of annular ribs 111 forms a passage for the cooling oil to flow through.

[0052] Among them, such as Figure 2 As shown, at least one connecting port 112 is provided between each pair of adjacent annular ribs 111, and the passages between the multiple annular ribs 111 are connected through multiple connecting ports 112. The first inlet 152 is located outside the outermost annular rib 111, and the first outlet 153 is located inside the innermost annular rib 111. Cooling oil can enter between the multiple annular ribs 111 from the first inlet 152 on the periphery of the shell bottom plate 11, and flow along the multiple annular ribs 111 toward the center of the shell bottom plate 11. The longer flow path of the cooling oil allows for better distribution throughout the entire area of ​​the shell bottom plate 11, and the larger volume of cooling oil in the first cooling chamber 151 results in better stability and continuity of the oil volume in the first cooling chamber 151. The liquid spray from the injection port 141 is more stable and even, and the cooling effect on all parts of the rotor is also more even.

[0053] Preferably, there is only one connecting port 112 between each two adjacent annular ribs 111. The connecting ports 112 on the two adjacent annular ribs 111 are located on opposite sides of the annular ribs 111 in the radial direction, so that the distance between the two adjacent connecting ports 112 is greater, and the cooling oil can flow from the outer ring of the bottom plate 11 in a ring shape inward, and the flow path of the cooling oil is longer.

[0054] When the stator assembly is located within the mounting cavity, it is preferably positioned to fit snugly against the second cover plate 16. By injecting coolant or cooling airflow into the second cooling cavity 161, heat can be carried away from the stator assembly, thus dissipating heat from the stator assembly 200. Preferably, cooling water can be introduced into the second cooling cavity 161. As the cooling water flows through the second cooling cavity 161, the heat from the stator assembly 200 can be conducted through the second cover plate 16 to the cooling water within the second cooling cavity 161, thereby carrying away heat from the stator assembly 200. Simultaneously, when the temperature of the cooling oil in the first cooling cavity 151 is higher than the temperature of the cooling water, the heat from the cooling oil in the first cooling cavity 151 can be conducted through the bottom plate 11 to the cooling water within the first cooling cavity 151, thus carrying away some of the heat from the cooling oil in the first cooling cavity 151 and cooling the cooling oil.

[0055] Specifically, such as Figure 3 As shown, a plurality of guide ribs 113 protrude from the side of the bottom plate 11 facing the second cover plate 16. These guide ribs 113 are arranged radially around the inner ring portion 13 and all abut against the second cover plate 16. Each guide rib 113 extends radially along the inner ring portion 13, forming a passage for cooling water to flow through. The second inlet 162 and the second outlet 163 are located on opposite sides of one of the guide ribs 113 along the periphery of the inner ring portion 13. Each of the remaining guide ribs 113 has at least one notch 114, which are interconnected to form a flow channel. The two ends of the flow channel are connected to the second inlet 162 and the second outlet 163, respectively. External cooling water can enter the flow channel from the second inlet 162 and flow to the second outlet 163.

[0056] The second inlet 162 and the second outlet 163 are located on the same side of the shell side plate 12 for easy connection of water supply pipes. Preferably, only one notch 114 is provided between two adjacent guide ribs 113 arranged circumferentially along the inner ring portion 13. Specifically, the notch 114 is formed by a gap between the first end of the preceding guide rib 113 and the inner ring portion 13, and a gap 114 is formed between the second end of the following guide rib 113 and the shell side plate 12, thereby forming a connected flow channel among the multiple guide ribs 113. This arrangement results in a longer flow path in the flow channel, allowing cooling water to flow more effectively through all parts of the second cover plate 16, thereby better removing heat from all parts of the stator assembly 200 and making the heat dissipation of the stator assembly 200 more uniform.

[0057] Furthermore, the motor housing 100 is provided in two sets, and the mounting cavities of the main body 1 of the two sets of motor housing 100 are arranged opposite each other, so that at least one stator assembly 200 can be accommodated in each mounting cavity. Among them, the mating area of ​​the two mounting cavities can accommodate the rotor, so that the coolant in the two first cooling cavities 151 on the two motor housings 100 can spray cooling oil towards the two axial end faces of the rotor, thereby improving the cooling efficiency of the rotor.

[0058] This utility model also provides a motor 1000, combined with Figure 4 and Figure 5 As shown, the motor 1000 includes the aforementioned motor housing 100, stator assembly 200, and rotor. The stator assembly 200 is disposed within the mounting cavity of the motor housing 100 and surrounds the outer periphery of the inner ring portion 13 of the motor housing 100. The rotor is disposed on the side of the stator assembly 200 facing away from the second cover plate 16 of the motor housing 100. Coolant flowing from the first cooling chamber 151 of the motor housing 100 can flow from the first outlet to the rotor.

[0059] In this embodiment, cooling oil is injected into the first cooling chamber 151 of the motor housing 100. The cooling oil flows axially from the outside of the stator assembly 200 to the inside of the stator assembly 200, and is then sprayed onto the rotor to cool it. Cooling water is injected into the second cooling chamber 161 of the motor housing 100. The cooling water flows in from one side and out from the other side. Since the stator assembly 200 is located close to the second cooling chamber 161, the cooling water in the second cooling chamber 161 can carry away the heat from the stator assembly 200, thus achieving heat dissipation for the stator assembly 200. The first cooling chamber 151 and the second cooling chamber 161 of the motor 1000 are fitted together and integrated into the housing body 1, resulting in a more compact structure, smaller footprint, and better heat dissipation for the stator assembly 200 and rotor, thus ensuring the stable and continuous operation of the motor 1000.

[0060] Among them, such as Figure 4As shown, the stator assembly 200 includes a plurality of stator cores 201 and a plurality of stator windings 202 corresponding to each of the stator cores 201. The stator cores 201 are arranged circumferentially along the inner ring 13 of the motor housing 100. Each stator core 201 is arranged in a roughly fan shape to make the spacing between adjacent stator cores 201 more uniform. When the stator windings 202 are wound along each stator core 201, they can be wound in an arc shape at the radial end corners of the stator cores 201, thereby forming a recessed area at the ends of adjacent stator windings 202. The outer periphery of the inner ring portion 13 is provided with a first channel 14 that connects the first cooling cavity 151 and the mounting cavity. The first channel 14 is provided in the area between two adjacent stator windings 202 and is at least partially located in the recessed area. The first channel 14 does not occupy more radial space, making the arrangement of the stator assembly 200 and the inner ring portion 13 more compact, and the radial dimension of the entire motor 1000 can also be smaller.

[0061] Preferably, when two stator assemblies 200 are provided, the two stator assemblies 200 are symmetrically arranged on both sides of the rotor. At this time, two motor housings 100 are also provided, symmetrically connected, each housing a stator assembly 200. The two second cooling chambers 161 on the two motor housings 100 can cool the two stator assemblies 200 respectively. The two first cooling chambers 151 on the two motor housings 100 can cool both axial sides of the rotor respectively, resulting in higher cooling efficiency and a more compact layout and smaller size of the entire motor 1000.

[0062] This utility model also provides a motor system, including the aforementioned motor 1000, an oil supply device, and a water supply device. An oil outlet is provided on one side of the motor 1000, and the oil outlet is connected to the mounting cavity. One end of the oil supply device is connected to the first inlet 152, and the other end of the oil supply device is connected to the oil outlet. One end of the water supply device is connected to the second inlet 162, and the other end of the water supply device is connected to the second outlet 163.

[0063] The oil supply device may include a first suction device, a first pipe connected at one end to the inlet end of the first suction device, and a second pipe connected at one end to the outlet end of the first suction device. The other end of the second pipe is connected to the first inlet 152, and the other end of the first pipe is connected to the first outlet 153. The cooling oil after cooling the rotor can flow to the first outlet 153. Under the action of the first suction device, it can enter through the first pipe and pass through the first suction device, and then enter the first cooling chamber 151 from the first inlet 152 through the second pipe. When the cooling oil flows through the first cooling chamber 151, it can dissipate heat through the cooling water in the first cover plate 15 and the second cooling chamber 161 at the same time, thereby reducing the temperature of the cooling oil in the first cooling chamber 151, so that the temperature of the cooling oil flowing from the first cooling chamber 151 to the spray nozzle 141 is even lower, so as to better cool the rotor.

[0064] The water supply device may include a second suction device, a third pipe connected at one end to the inlet end of the second suction device, and a fourth pipe connected at one end to the outlet end of the second suction device. The other end of the third pipe is connected to the second inlet 162, and the other end of the fourth pipe is connected to the second outlet 163. Cooling water enters the second cooling chamber 161 through the third pipe under the action of the suction device, and flows along the second cooling chamber 161 through the second outlet 163 to the fourth pipe, so as to flow to the second suction device. The cooler cooling water, after entering the second cooling chamber 161, can carry away the heat in the stator assembly 200 and the second cooling chamber 161, while the cooler cooling water flowing out of the second outlet 163 is of higher temperature. The motor system may also include a radiator, which cools the cooling water flowing out of the second outlet 163, allowing it to re-enter the second cooling chamber 161 for recycling.

[0065] This motor system uses oil cooling for the rotor and water cooling for the stator assembly 200. Both the water-cooling chamber and the oil-cooling chamber are integrated into the main housing 1, resulting in a compact structure and small footprint, thus reducing the overall size of the motor 1000. Furthermore, the water-cooling chamber can simultaneously cool the oil-cooling chamber, and the integrated heat sink on the motor housing 100 enhances the heat dissipation of the oil-cooling chamber. Without increasing the size of the motor housing 100, this effectively improves heat dissipation efficiency and extends the service life of the motor 1000.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A motor housing, characterized in that, include: The shell body includes a shell bottom plate and shell side plates arranged around the outer periphery of the shell bottom plate. The shell bottom plate has a first side and a second side arranged opposite to each other along its axial direction. The shell side plates and the first side of the shell bottom plate form a mounting cavity suitable for accommodating a stator assembly and / or a rotor. A first cover plate is disposed on the second side of the shell bottom plate and together with the shell bottom plate and the shell side plate forms a first cooling cavity. The first cooling cavity has a first inlet and a first outlet that are connected to each other. The first inlet is adapted to communicate with the outside, and the first outlet is connected to the mounting cavity. The second cover plate is disposed on the first side of the shell bottom plate and together with the shell bottom plate and the shell side plate, forms a second cooling cavity. The second cooling cavity has a second inlet and a second outlet that are connected to each other. The second inlet and the second outlet are both adapted to communicate with the outside. The mounting cavity is located on the side of the second cover plate that faces away from the shell bottom plate. In this embodiment, at least one of the first cover plate and the second cover plate is configured as a heat dissipation plate.

2. The motor housing as described in claim 1, characterized in that, The first inlet is located on the side plate of the shell, and a first channel is formed on the bottom plate of the shell to connect the first outlet and the mounting cavity. The first channel extends along the axial direction of the bottom plate of the shell and is located near the middle of the bottom plate of the shell.

3. The motor housing as described in claim 2, characterized in that, The bottom plate of the shell has an inner ring portion extending axially along the bottom plate. One axial end of the inner ring portion abuts against the first cover plate, and the other axial end of the inner ring portion protrudes from the second cover plate and extends into the mounting cavity. The stator assembly is adapted to surround the outer periphery of the inner ring portion, and at least a portion of the first channel is provided on the inner ring portion.

4. The motor housing as described in claim 3, characterized in that, The first channel has a spray port formed at the end of the mounting cavity, and the spray port is adapted to be positioned toward the axial end face of the rotor.

5. The motor housing as described in claim 3, characterized in that, The bottom plate of the shell protrudes from one side toward the first cover plate and is provided with a plurality of annular ribs. The plurality of annular ribs abut against the first cover plate. The plurality of annular ribs are nested in sequence and are all arranged around the outer periphery of the inner ring. At least one connection is provided between each pair of adjacent annular ribs, with the first inlet located outside the outermost annular rib and the first outlet located inside the innermost annular rib.

6. The motor housing as described in claim 5, characterized in that, A connecting opening is provided between each pair of adjacent annular ribs, and the connecting openings on the two adjacent annular ribs are respectively located on opposite sides of the annular ribs in the radial direction.

7. The motor housing as described in claim 3, characterized in that, The bottom plate of the shell protrudes from the side facing the second cover plate and is provided with a plurality of guide ribs. The plurality of guide ribs are arranged radially with the inner ring as the center and all abut against the second cover plate. The second inlet and the second outlet are respectively located on both sides of one of the guide ribs along the circumference of the inner ring portion. Each of the remaining guide ribs is provided with at least one notch, and the multiple notches are connected to form a guide channel. The two ends of the guide channel are respectively connected to the second inlet and the second outlet.

8. An electric motor, characterized in that, include: The motor housing as described in any one of claims 1 to 7; The stator assembly is disposed within the mounting cavity of the motor housing and surrounds the outer periphery of the inner ring portion of the motor housing; The rotor is located on the side of the stator assembly facing away from the second cover plate of the motor housing; The coolant flowing out of the first cooling chamber of the motor housing can flow from the first outlet to the rotor.

9. The motor as described in claim 8, characterized in that, The stator assembly includes multiple stator cores and multiple stator windings wound around the outer periphery of the multiple stator cores in a one-to-one correspondence. The multiple stator cores are arranged circumferentially along the inner ring of the motor housing. The outer periphery of the inner ring is provided with a first channel connecting the first cooling cavity and the mounting cavity. The first channel is provided in the area between two adjacent stator windings.

10. A motor system, characterized in that, include: The motor as described in any one of claims 8 and 9 is provided with an oil outlet on one side, and the oil outlet is connected to the mounting cavity; An oil supply device, one end of which is connected to the first inlet and the other end of which is connected to the oil outlet; A water supply device, one end of which is connected to the second inlet and the other end of which is connected to the second outlet.

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