Wheel hub motor stator assembly and motor

Abstract

The invention relates to a hub motor stator assembly and a motor. The wheel hub motor stator assembly comprises an outer shell, wherein an inner shell is arranged in the middle of the outer shell; the plurality of stator structures surround the inner shell and are arranged in the outer shell, and a gap is formed between every two adjacent stator structures; the at least one flow baffle is configured in the interval between the two stator structures, the flow baffle divides the internal space of the shell into a plurality of accommodating cavities, and each accommodating cavity is provided with at least one stator structure; wherein the edge of the shell is a hollow channel for a cooling medium to circulate, the first liquid inlet is communicated with the second liquid inlets, and the first liquid outlet is communicated with the second liquid outlets; one second liquid inlet and one second liquid outlet are formed in the position of one containing cavity. And by adopting a parallel cooling mode, the cooling uniformity of a cooling medium on the stator structure is improved, the cooling effect is improved, and the service life of the stator structure is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a hub motor stator assembly and a motor. Background Art

[0002] According to the direction of the magnetic flux path, motors can be divided into axial flux motors and radial flux motors. The magnetic poles of the stator of an axial flux motor are arranged along the axis, and the rotor is usually a cylindrical structure. The magnetic flux passes through the central axis of the rotor. When the current passes through the stator winding, the generated magnetic field passes through the rotor along the axis. According to the Lorentz force law, this magnetic field will generate torque in the rotor, thereby driving the rotor to rotate. Axial flux hub motors have the problem of high heat generation, poor heat dissipation performance, and uneven cooling inside the stator, which leads to poor cooling effect. It is necessary to solve its heat dissipation problem to improve motor performance and service life.

[0003] Traditionally, oil cooling technology is used to cool the stator of the axial flux hub motor, but the cooling oil circuit design still has defects, resulting in poor engineering feasibility and poor cooling effect. Summary of the invention

[0004] Based on this, it is necessary to provide a hub motor stator assembly and a motor to address the problem of poor cooling effect of the flux hub motor stator.

[0005] A hub motor stator assembly, the hub motor stator assembly comprising:

[0006] An outer shell, wherein the middle portion of the outer shell has an inner shell;

[0007] A plurality of stator structures, wherein the plurality of stator structures are arranged inside the outer shell around the inner shell, and a gap is provided between two adjacent stator structures;

[0008] At least one baffle plate is disposed in the interval between the two stator structures, the baffle plate divides the inner space of the housing into a plurality of accommodating chambers, and one accommodating chamber has at least one stator structure;

[0009] Among them, the edge of the shell is a hollow channel for the circulation of cooling medium, and the hollow channel includes a first liquid inlet, a first liquid outlet, multiple second liquid inlets and multiple second liquid outlets, the first liquid inlet is connected to each of the second liquid inlets, and the first liquid outlet is connected to each of the second liquid outlets; one second liquid inlet and one second liquid outlet are arranged at the position of one of the accommodating chambers.

[0010] In one embodiment, the inner wall of the outer shell has a plurality of first grooves, and the inner shell has a plurality of second grooves on a side facing the inner wall of the outer shell, and a first groove and a second groove are positioned opposite to each other; the first end of the baffle extends into the first groove, and the second end extends into the second groove.

[0011] In one embodiment, the stator structure includes a magnetic core and a plurality of winding coils, the magnetic core is provided with a plurality of teeth arranged at intervals along an extension direction, the plurality of winding coils are sleeved on the teeth in a one-to-one correspondence, and a gap is formed between two adjacent winding coils.

[0012] In one of the embodiments, one side of the housing has an opening, and the hub motor stator assembly further includes a first sealing plate, and the first sealing plate is detachably covered on the opening.

[0013] In one embodiment, the stator structure is provided with a first limiting groove and a second limiting groove on a side facing the first sealing plate and a side facing the outer shell, respectively. The stator structure also includes a second sealing plate, the second sealing plate has a first limiting column, the first limiting column can extend into the first limiting groove, and the outer shell has a second limiting column, the second limiting column can extend into the second limiting groove; the second sealing plate is detachably arranged between the first sealing plate and the stator structure.

[0014] In one of the embodiments, the second sealing plate is provided with a third groove, and the third groove corresponds to the position of the baffle plate, so that the third end of the baffle plate extends into the third groove.

[0015] In one of the embodiments, a plurality of fourth grooves are formed at the inner bottom of the housing, and the fourth grooves correspond to the positions of the baffle plates, so that the fourth ends of the baffle plates extend into the fourth grooves.

[0016] In one of the embodiments, the hub motor stator assembly further includes a plurality of flow limiting members, and the plurality of flow limiting members are respectively disposed in the hollow channel to limit the flow of the cooling medium passing through the flow limiting members.

[0017] In one embodiment, the flow limiting member is an annular structure, and has a flow limiting hole in the middle for passing the cooling medium, and the diameter of the flow limiting hole increases successively along the direction from the first liquid inlet to the first liquid outlet.

[0018] A motor comprises the hub motor stator assembly as described in any one of the items.

[0019] In the above-mentioned hub motor stator assembly and motor, the internal space of the shell is divided into multiple accommodating chambers by multiple baffles, and each accommodating chamber has more than one stator structure. When the cooling medium enters the hollow channel from the first liquid inlet, it can enter each accommodating chamber from the second liquid inlet. A parallel cooling form is formed between each accommodating chamber, that is, the cooling medium located in the hollow channel can enter each accommodating chamber at the same time. In the traditional technology, the cooling medium cools the stator structure one by one, resulting in a slow cooling efficiency of the stator structure located at the back. The hub motor stator assembly provided by the present application adopts a parallel cooling method to achieve synchronous cooling of each stator structure, forming a separate cooling circuit, effectively increasing the flow area of ​​the cooling medium, improving the cooling efficiency of the motor, improving the uniformity of the cooling of the stator structure by the cooling medium, improving the cooling effect, and extending the service life of the stator structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a hub motor stator assembly in one embodiment.

[0021] Figure 2 Schematic diagram of the structure of a housing in one embodiment.

[0022] Figure 3 Schematic diagram of the structure of the inner shell in one embodiment.

[0023] Figure 4 It is a schematic diagram of inserting a baffle into a first groove and a second groove in one embodiment.

[0024] Figure 5 FIG. 4 is a schematic diagram of the structure of a baffle in an embodiment.

[0025] Figure 6 Schematic diagram of the structure of a stator in one embodiment.

[0026] Figure 7 It is a schematic diagram of a first sealing plate cover disposed on a housing in an embodiment.

[0027] Figure 8 FIG. 4 is a schematic diagram of the structure of a second sealing plate in an embodiment.

[0028] Fig. 9 It is a schematic structural diagram of a hub motor stator assembly hiding a first sealing plate in one embodiment.

[0029] Fig.10 Schematic diagram of the liquid inlet passage of the cooling medium in one embodiment.

[0030] Fig.11 Schematic diagram of the liquid outlet passage of the cooling medium in one embodiment.

[0031] Fig.12Schematic diagram of the flow direction of the cooling medium in one embodiment.

[0032] Description of reference numerals:

[0033] 10. Shell; 11. Accommodating cavity; 12. Hollow channel; 121. First liquid inlet; 122. First liquid outlet; 123. Second liquid inlet; 124. Second liquid outlet; 125. First groove; 126. First threaded hole; 20. Inner shell; 21. Second groove; 30. Stator structure; 31. Magnetic core; 32. Winding coil; 33. First limiting groove; 34. Second sealing plate; 341. First limiting column; 342. Third threaded hole; 343. Third groove; 40. Baffle; 50. First sealing plate; 51. Second threaded hole; 60. Current limiting member. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0040] In traditional technology, stator cooling is mostly in the form of immersion oil cooling or a single long cooling oil circuit inside the stator is designed with an oil baffle, which is prone to coolant flow dead zones and large temperature differences between the inlet and outlet of the stator oil circuit causing local overheating, uneven internal coolant temperature distribution, low cooling efficiency, and poor cooling effect.

[0041] See also Figure 1 , Figure 1The schematic diagram of the structure of the hub motor stator assembly in one embodiment of the present invention is shown. The hub motor stator assembly provided in one embodiment of the present invention includes an outer shell 10, an inner shell 20, a plurality of stator structures 30 and at least one baffle 40. The outer shell 10 has a containing space inside, and a cooling medium passage is formed around the outer shell 10, and the cooling medium passage is connected with the internal containing space. When the cooling medium passage has cooling medium, it can flow into the containing space inside the outer shell 10. The inner shell 20, the stator structure 30 and the baffle 40 are all arranged in the internal containing space of the outer shell 10, and the stator structure 30 is arranged inside the outer shell 10 along the circumferential direction of the outer shell 10. When the cooling medium flows into the stator structure 30, it can cool the stator structure 30. Among them, the inner shell 20 and the baffle 40 can divide the internal space of the outer shell 10 into a plurality of containing cavities 11, and the cooling medium passage is connected with each containing cavity 11, so that the parallel connection of each containing cavity 11 is realized, and the cooling effect is improved.

[0042] Specifically, a plurality of stator structures 30 are arranged inside the outer shell 10 around the inner shell 20, with a gap between two adjacent stator structures 30; and a baffle 40 is disposed in the gap between the two stator structures 30. The baffle 40 divides the inner space of the outer shell 10 into a plurality of accommodating chambers 11, and one accommodating chamber 11 has at least one stator structure 30. Exemplarily, two baffles 40 are divided into two accommodating chambers 11, and six baffles 40 are divided into six accommodating chambers 11. Optionally, the plurality of baffles 40 are distributed at equal intervals to facilitate adjustment of the flow of the cooling medium entering each accommodating chamber 11.

[0043] The edge of the shell 10 is constructed as a hollow channel 12 for cooling medium to flow through. The hollow channel 12 includes a first liquid inlet 121 and a first liquid outlet 122. The first liquid inlet 121 serves as a total liquid inlet, and the first liquid outlet 122 serves as a total liquid outlet. The cooling medium is input into the hollow channel 12 from the first liquid inlet 121, and flows to the first liquid outlet 122 for discharge.

[0044] The hollow channel 12 includes a plurality of second liquid inlets 123 and a plurality of second liquid outlets 124. One second liquid inlet 123 and one second liquid outlet 124 are set as a group at the position of one accommodating cavity 11. The first liquid inlet 121 is connected to each second liquid inlet 123, and the first liquid outlet 122 is connected to each second liquid outlet 124; thus, after the cooling medium enters the hollow channel 12, it can enter each accommodating cavity 11 from the second liquid inlet 123 of each accommodating cavity 11, cool the stator structure 30 located in each accommodating cavity 11, and then flow out from the second liquid outlet 124 corresponding to the accommodating cavity 11 to the hollow channel 12.

[0045] In the above embodiment, the internal space of the housing 10 is divided into a plurality of accommodating chambers 11 by a plurality of baffles 40, and each accommodating chamber 11 has more than one stator structure 30. When the cooling medium enters the hollow channel 12 from the first liquid inlet 121, it can enter each accommodating chamber 11 from the second liquid inlet 123. A parallel cooling form is formed between each accommodating chamber 11, that is, the cooling medium in the hollow channel 12 can enter each accommodating chamber 11 at the same time. In the conventional technology, the cooling medium cools the stator structure 30 one by one, resulting in a slow cooling efficiency of the stator structure 30 located at the back. The hub motor stator assembly provided in the present application adopts a parallel cooling method to achieve synchronous cooling of each stator structure 30, forming a separate cooling circuit, effectively increasing the flow area of ​​the cooling medium, improving the cooling efficiency of the motor, improving the uniformity of the cooling of the stator structure 30 by the cooling medium, improving the cooling effect, and extending the service life of the stator structure 30.

[0046] See also Figure 2 and Figure 3 , Figure 2 A schematic structural diagram of a housing 10 in one embodiment is shown. Figure 3 FIG. 2 shows a schematic diagram of the structure of the inner shell 20 in an embodiment. Figure 2 In some embodiments, the inner wall of the housing 10 has a plurality of first grooves 125. Figure 3 The inner shell 20 has a plurality of second grooves 21 on one side facing the inner wall of the outer shell 10 , and a first groove 125 and a second groove 21 are located opposite to each other; the first end S1 of the baffle plate 40 extends into the first groove 125 , and the second end S2 extends into the second groove 21 .

[0047] See also Figure 4 , Figure 4 A schematic diagram of an embodiment of the baffle plate 40 being inserted into the first groove 125 and the second groove 21 is shown. Thus, the outer shell 10 and the inner shell 20 can limit the baffle plate 40 and restrict its shaking. At the same time, since the first end S1 of the baffle plate 40 is partially inserted into the first groove 125 and the second end S2 is partially inserted into the second groove 21, a certain sealing effect is achieved, reducing or preventing the cooling medium from flowing between the accommodating chambers 11.

[0048] See also Figure 5 , Figure 5 The schematic diagram of the structure of the baffle plate 40 in one embodiment is shown, the first end S1 and the second end S2 of the baffle plate 40 are opposite, and the third end S3 and the fourth end S4 are opposite. The first end S1, the second end S2, the third end S3 and the fourth end S4 are all protruding structures, which are convenient for extending into the groove.

[0049] See also Figure 6 , Figure 6A schematic diagram of the structure of a stator structure 30 in an embodiment is shown. In some embodiments, the stator structure 30 includes a magnetic core 31 and a plurality of winding coils 32, the magnetic core 31 is provided with a plurality of teeth arranged at intervals along the extension direction, and a plurality of winding coils 32 are sleeved on the teeth in a one-to-one correspondence, and a gap is formed between two adjacent winding coils 32. Exemplarily, the magnetic core 31 can use soft magnetic materials, such as silicon steel sheets, iron powder cores or highly magnetic alloy materials, which have high magnetic permeability, can effectively guide magnetic flux lines, and reduce energy loss. Exemplarily, the magnetic core 31 can be composed of a plurality of stacked silicon steel sheets, and the plurality of silicon steel sheets form teeth, which facilitates the winding coils 32 to be wound on the teeth. The winding coils 32 can be made of insulated copper wire or aluminum wire, and arranged on the surface of the stator magnetic core 31 to form an electromagnetic field of the motor.

[0050] See also Figure 7 , Figure 7 A schematic diagram of a first sealing plate 50 covering the housing 10 in an embodiment is shown. In some embodiments, one side of the housing 10 has an opening, and the hub motor stator assembly further includes a first sealing plate 50, and the first sealing plate 50 is detachably covered on the opening. In this way, when the first sealing plate 50 is installed in the opening, on the one hand, it can shield the stator structure 30 from damage, and on the other hand, it can also seal the internal cooling medium to prevent it from leaking out. In a feasible implementation, a sealing strip can also be provided on the side of the first sealing plate 50 facing the housing 10 to improve the sealing effect.

[0051] See also Figure 2 and Figure 7 In a feasible implementation, a first threaded hole 126 is opened on the housing 10, and a second threaded hole 51 is opened on the first sealing plate 50. Bolts or other threaded parts are simultaneously passed through the first threaded hole 126 and the second threaded hole 51 to achieve a detachable connection between the first sealing plate 50 and the housing 10.

[0052] Continue to see Figure 4 The stator structure 30 has a first limiting groove 33 and a second limiting groove (not shown in the figure) respectively on one side facing the first sealing plate 50 and the other side facing the housing 10, that is, both sides of the stator structure 30 have grooves. Figure 8 , Figure 8The schematic diagram of the structure of the second sealing plate 34 in one embodiment is shown. In some embodiments, the stator structure 30 further includes a second sealing plate 34, and the second sealing plate 34 has a first limiting column 341. The first limiting column 341 on the first side of the stator structure 30 can extend into the first limiting groove 33 and be limited by the first limiting groove 33 to limit its shaking or rotation. In a feasible implementation, the first limiting column 341 can be realized by adding a protruding structure on the second sealing plate 34. In another feasible implementation, a groove is provided on the stator core 31, which is equivalent to the non-groove part being a protrusion. A groove can be provided on the second sealing plate 34 corresponding to the protruding position of the stator core 31, thereby forming the first limiting column 341.

[0053] The housing 10 has a second limiting column (not shown in the figure), and the second limiting column on the second side of the stator structure 30 can extend into the second limiting groove for limiting, further limiting shaking or rotation. In this way, the movement of the stator structure 30 is limited by the second sealing plate 34 and the limiting column on the housing.

[0054] The second sealing plate 34 is detachably disposed between the first sealing plate 50 and the stator structure 30. Fig. 9 , Fig. 9 A schematic diagram of the structure when the first sealing plate 50 is hidden in an embodiment is shown. For example, a plurality of third threaded holes 342 are provided on the second sealing plate 34, and the positions of the third threaded holes 342 and the first threaded holes 126 and the second threaded holes 51 correspond to each other, so that bolts can be simultaneously inserted between the first threaded holes 126, the second threaded holes 51 and the third threaded holes 342, and the first sealing plate 50, the second sealing plate 34 and the housing 10 are connected at the same time.

[0055] Continue to see Figure 8 In some embodiments, the second sealing plate 34 is provided with a third groove 343, and the third groove 343 corresponds to the position of the baffle plate 40, so that the third end S3 of the baffle plate 40 extends into the third groove 343. In this way, the baffle plate 40 is further limited. In addition, a plurality of fourth grooves may be provided at the bottom of the housing 10, and the fourth grooves correspond to the position of the baffle plate 40, so that the fourth end S4 of the baffle plate 40 extends into the fourth groove. In this way, the first end S1, the second end S2, the third section S3 and the fourth end S4 of the baffle plate 40 are respectively limited by the first groove 125, the second groove 21, the third groove 343 and the fourth groove, so that the baffle plate 40 is fixed in the gap between the stator structures 30.

[0056] See also Fig.10 and Fig.11 , Fig.10 A schematic diagram of a liquid inlet passage for a cooling medium in one embodiment is shown. Fig.11A schematic diagram of the outlet passage of the cooling medium in one embodiment is shown. In some embodiments, the hub motor stator assembly further includes a plurality of flow limiting members 60, and the plurality of flow limiting members 60 are respectively arranged in the hollow channel 12, for limiting the flow of the cooling medium passing through the flow limiting members 60. By limiting the flow of the cooling medium by the flow limiting members 60, the amount of cooling medium entering the accommodating cavity 11 can be limited, and the pressure inside the accommodating cavity 11 can be further regulated. Exemplarily, the flow limiting member 60 can be arranged at the position of the second liquid inlet 123 of each accommodating cavity 11, and the flow limiting member 60 can be arranged before the cooling medium enters the accommodating cavity 11 or at a position after the cooling medium enters the accommodating cavity 11, that is, at the front end or rear end of the second liquid inlet 123, where the front end and rear end are determined based on the flow direction of the liquid medium in the hollow channel 12, that is, in the hollow channel 12, the front end is close to the first liquid inlet 121, and the rear end is close to the first liquid outlet 122.

[0057] In a feasible implementation, the flow limiting member 60 is an annular structure with a flow limiting hole in the middle for passing the cooling medium. The liquid medium passes through the flow limiting hole, and the flow rate of the liquid medium can be controlled by controlling the aperture of the flow limiting hole, thereby further limiting the flow of the liquid medium.

[0058] In some embodiments, the diameter of the flow limiting hole increases in sequence from the first liquid inlet 121 to the first liquid outlet 122. A plurality of pressure regulating plates are provided near the second oil inlet inside the central control channel, wherein the plurality of pressure regulating plates have different models, the inner diameter of the flow limiting hole near the first liquid inlet 121 is smaller, and the inner diameter of the flow limiting hole far from the first liquid inlet 121 and near the first liquid outlet 122 is larger, so that the flow rate near the first liquid inlet 121 is more restricted, and the flow rate far from the first liquid inlet 121 is less restricted, so that the flow limiting member 60 with different flow limiting hole diameters can ensure that the cooling medium enters different accommodating cavities 11 to achieve uniform distribution, and ensure that the internal pressure of each accommodating cavity 11 of the stator assembly is uniform.

[0059] by Fig.10For example, the internal space of the housing 10 is divided into the first accommodating chamber 11-1, the second accommodating chamber 11-2, the third accommodating chamber 11-3, the fourth accommodating chamber 11-4, the fifth accommodating chamber 11-5 and the sixth accommodating chamber 11-6 along the flow direction of the cooling medium by 6 baffles 40, that is, they are successively away from the first liquid inlet 121. Five flow limiters 60 are provided, namely the first flow limiter 60-1, the second flow limiter 60-1, the third flow limiter 60-1, the fourth flow limiter 60-1 and the fifth flow limiter 60-1, which are successively arranged after the second liquid inlet 123 of the first accommodating chamber 11-1, after the second liquid inlet 123 of the second accommodating chamber 11-2, after the second liquid inlet 123 of the third accommodating chamber 11-3, after the second liquid inlet 123 of the fourth accommodating chamber 11-4 and after the second liquid inlet 123 of the fifth accommodating chamber 11-5.

[0060] See also Fig.12 , Fig.12 The flow direction of the cooling medium in one embodiment is shown. The cooling medium flows into the hollow channel 12 from the first liquid inlet 121, and passes through six parallel cooling medium passages. The cooling medium in the first passage directly flows into the first accommodating chamber 11-1 through the second liquid inlet 123 of the first accommodating chamber 11-1, then flows out through the second liquid outlet 124 of the first accommodating chamber 11-1, and finally flows out from the first liquid outlet 122. The cooling medium in the second passage first flows through the first flow restrictor 60-1 for pressure adjustment and equalization before flowing into the second accommodating chamber 11-2; the cooling medium in the third passage first flows through the second flow restrictor 60-2 for pressure adjustment and equalization before flowing into the third accommodating chamber 11; the cooling medium in the fourth passage first flows through the third flow restrictor 60-3 for pressure adjustment and equalization before flowing into the fourth accommodating chamber 11; the cooling medium in the fifth passage first flows through the fourth flow restrictor 60-4 for pressure adjustment and equalization before flowing into the fifth accommodating chamber 11; the cooling medium in the sixth passage first flows through the sixth flow restrictor 60-6 for pressure adjustment and equalization before flowing into the sixth accommodating chamber 11. Finally, the cooling medium in the first accommodating chamber 11-1, the second accommodating chamber 11-2, the third accommodating chamber 11-3, the fourth accommodating chamber 11-4, the fifth accommodating chamber 11-5 and the sixth accommodating chamber 11-6 all flows into the hollow channel 12 through the second liquid outlet 124 and then flows out from the first liquid outlet 122.

[0061] In the present embodiment, a plurality of flow limiting members 60 are provided, and the flow limiting holes of the plurality of flow limiting members 60 are of different models, and the flow limiting holes of the flow limiting members 60 near the oil inlet are smaller, and are evenly spaced near the oil inlet hole of the oil inlet pipe inside the flow channel component, thereby achieving uniform distribution of cooling oil to the plurality of stator accommodating cavities 11, and solving the technical problems of inconsistent cooling oil temperature at the oil inlet and outlet, lengthy cooling oil circuit, low cooling efficiency and poor cooling effect in the traditional cooling method.

[0062] In addition, the present application also provides a motor, comprising the hub motor stator assembly in any one of the above embodiments.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A hub motor stator assembly, characterized in that: The hub motor stator assembly comprises: An outer shell, wherein the middle portion of the outer shell has an inner shell; A plurality of stator structures, wherein the plurality of stator structures are arranged inside the outer shell around the inner shell, and a gap is provided between two adjacent stator structures; At least one baffle plate is disposed in the interval between the two stator structures, the baffle plate divides the inner space of the housing into a plurality of accommodating chambers, and one accommodating chamber has at least one stator structure; Among them, the edge of the shell is a hollow channel for the circulation of cooling medium, and the hollow channel includes a first liquid inlet, a first liquid outlet, multiple second liquid inlets and multiple second liquid outlets, the first liquid inlet is connected to each of the second liquid inlets, and the first liquid outlet is connected to each of the second liquid outlets; one second liquid inlet and one second liquid outlet are arranged at the position of one of the accommodating chambers.

2. The hub motor stator assembly according to claim 1, characterized in that: The inner wall of the outer shell has a plurality of first grooves, and the inner shell has a plurality of second grooves on one side facing the inner wall of the outer shell, with one first groove and one second groove being positioned opposite to each other; the first end of the baffle extends into the first groove, and the second end extends into the second groove.

3. The hub motor stator assembly according to claim 1, characterized in that: The stator structure includes a magnetic core and a plurality of winding coils. The magnetic core is provided with a plurality of teeth arranged at intervals along an extension direction. The plurality of winding coils are sleeved on the teeth in a one-to-one correspondence, and a gap is formed between two adjacent winding coils.

4. The hub motor stator assembly according to claim 3, characterized in that: One side of the shell is provided with an opening, and the hub motor stator assembly further comprises a first sealing plate, and the first sealing plate is detachably covered on the opening.

5. The hub motor stator assembly according to claim 4, characterized in that: The stator structure is provided with a first limiting groove and a second limiting groove on one side facing the first sealing plate and on one side facing the housing, respectively. The stator structure further comprises a second sealing plate, the second sealing plate comprises a first limiting column, the first limiting column can extend into the first limiting groove, and the housing comprises a second limiting column, the second limiting column can extend into the second limiting groove; The second sealing plate is detachably disposed between the first sealing plate and the stator structure.

6. The hub motor stator assembly according to claim 5, characterized in that: The second sealing plate is provided with a third groove, and the third groove corresponds to the position of the baffle plate, so that the third end of the baffle plate extends into the third groove.

7. The hub motor stator assembly according to claim 1, characterized in that: A plurality of fourth grooves are formed at the inner bottom of the housing, and the fourth grooves correspond to the positions of the baffle plates, so that the fourth ends of the baffle plates extend into the fourth grooves.

8. The hub motor stator assembly according to claim 1, characterized in that: The hub motor stator assembly further includes a plurality of flow limiting members, which are respectively arranged in the hollow channel and are used to limit the flow of the cooling medium passing through the flow limiting members.

9. The hub motor stator assembly according to claim 8, characterized in that: The flow limiting member is an annular structure, and has a flow limiting hole in the middle for passing the cooling medium. The diameter of the flow limiting hole increases sequentially along the direction from the first liquid inlet to the first liquid outlet.

10. A motor, characterized in that: The motor comprises the hub motor stator assembly according to any one of claims 1-9.

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