Stator housing of axial magnetic flux motor

Abstract

The utility model belongs to the technical field of axial magnetic flux motors, and discloses an axial magnetic flux motor stator shell, which comprises a shell and an end cover, a circulating groove for circulating cooling liquid is arranged in the shell, the end cover is plugged at one end of the shell, and the circulating groove forms a cooling cavity arranged between the shell and the end cover. Adjacent parts of the shell and the end cover are connected through laser welding. According to the utility model, the shell and the end cover are sealed in a laser welding manner, so that the leakage of cooling liquid is prevented. According to the axial magnetic flux motor, other sealing structures do not need to be additionally assembled in the assembling process, so that the assembling process of the stator shell can be simplified, the production efficiency of the stator shell can be improved, and the production efficiency of the axial magnetic flux motor can be further improved; and the sealing effect of the shell and the end cover which are jointed through laser welding is better, so that the yield of the stator shell obtained through production can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flux motors, in particular to a stator housing of an axial flux motor. Background Art

[0002] Like traditional radial flux motors, axial flux motors also generate a large amount of heat during operation due to current effects, magnetic field change losses, mechanical friction, etc. In order to maintain the stable operation of the motor within a safe temperature range and ensure its performance and lifespan, effective cooling is required. Currently, most axial flux motors ensure stable operation within a safe temperature range through liquid cooling. Specifically, in the prior art, a stator housing is formed by assembling a housing and end caps installed at its ends. The stator housing is used to enclose and fix a stator assembly (including a stator core, windings, etc.), and a coolant chamber is formed inside it. The stator assembly is directly placed in the coolant chamber or in a position adjacent to the coolant chamber, so that when the coolant circulates, heat dissipation of the stator assembly is carried out.

[0003] From the above, in the prior art, the housing and the end caps of the stator housing are generally sealed and connected through a sealing ring or sealant to prevent coolant leakage. However, the above sealing connection method will make the assembly process of the stator housing complex and the operation difficult, thus affecting the production efficiency of the stator housing, and further affecting the production efficiency of the axial flux motor, and the sealing effect of the stator housing is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a stator housing of an axial flux motor to solve the problems that the assembly process of the stator housing is complex, the operation is difficult, which affects the production efficiency of the stator housing, and further affects the production efficiency of the axial flux motor, and the sealing effect of the stator housing is poor.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A stator housing of an axial flux motor, comprising:

[0007] A housing, in which a flow channel for circulating coolant is provided; and

[0008] An end cap, which plugs one end of the housing and forms the flow channel into a cooling chamber arranged between the housing and the end cap, and the adjacent parts of the housing and the end cap are joined by laser welding.

[0009] Preferably, both the housing and the end cap are made of aluminum.

[0010] Preferably, the housing includes an inner ring and an outer ring which are coaxially arranged. The flow-through groove is formed between the inner ring and the outer ring. The end cover is sleeved on the outer periphery of the inner ring, and the outer ring is sleeved on the outer periphery of the end cover. The outer ring and the end cover, as well as the end cover and the inner ring, are integrally joined by laser welding.

[0011] Preferably, a plurality of partition plates are arranged in the flow-through groove, and the plurality of partition plates divide the flow-through groove into a zigzag flow channel.

[0012] Preferably, support platforms are arranged on at least part of the partition plates, and the end cover is placed on the support platforms.

[0013] Preferably, a partition board is arranged in the housing. One side of the partition board is provided with the flow-through groove, and the other side of the partition board forms a cavity for installing a stator assembly. Convex platforms are arranged on at least part of the partition plates. For any one of the convex platforms, a first through hole is correspondingly arranged on the end cover. The convex platform is inserted into the first through hole. A second through hole is arranged on the convex platform. One end of the second through hole extends to the end face of the end cover through the first through hole, and the other end of the second through hole communicates with the cavity.

[0014] Preferably, the adjacent parts of the convex platform and the end cover are joined by laser welding.

[0015] Preferably, a weight-reducing groove is arranged on the side of the end cover facing away from the cooling cavity.

[0016] Preferably, a first ear plate is arranged on the housing. The first ear plate is located on the side far from the end cover, and a connection hole is arranged on the first ear plate.

[0017] Preferably, a second ear plate is arranged on the housing. The second ear plate is located on the side close to the end cover, and a mounting hole is arranged on the second ear plate.

[0018] Advantages of the present utility model:

[0019] In the present utility model, the housing and the end cover are sealed by laser welding, thereby preventing coolant leakage. Since laser welding only requires emitting a laser beam to the adjacent parts of the housing and the end cover after pre-assembling the housing and the end cover, and there is no need to additionally assemble other sealing structures during the assembly process. Therefore, the present utility model can simplify the assembly process of the stator housing, thereby improving the production efficiency of the stator housing, and further improving the production efficiency of the axial flux motor. In addition, the sealing effect of the housing and the end cover joined by laser welding is better, thereby improving the yield rate of the produced stator housing. Description of the drawings

[0020] Figure 1 It is one of the schematic structural diagrams of the stator housing of the axial-flux motor in the embodiment of the present utility model;

[0021] Figure 2 It is an exploded view of the stator housing of the axial-flux motor in the embodiment of the present utility model;

[0022] Figure 3 It is another schematic structural diagram of the stator housing of the axial-flux motor in the embodiment of the present utility model;

[0023] Figure 4 It is along Figure 3 The sectional view taken along line A-A in

[0024] In the figure:

[0025] 1. Housing; 11. Flow-through groove; 12. Inner ring; 121. Through hole; 13. Outer ring; 14. Partition piece; 141. Support platform; 142. Boss; 1421. Second through hole; 15. Partition board; 16. Cavity; 171. First ear plate; 1711. Connection hole; 172. Second ear plate; 1721. Mounting hole; 181. Liquid inlet; 182. Liquid outlet; 2. End cover; 21. First through hole; 22. Weight-reducing groove. Specific embodiments

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0027] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0029] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right" and "left" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Please refer to Figures 1 to 4 , this embodiment provides an axial flux motor stator housing, which includes a housing 1 and an end cover 2. Wherein, a circulation groove 11 for circulating coolant is arranged in the housing 1, and the end cover 2 is sealed at one end of the housing 1, so that the circulation groove 11 forms a cooling cavity arranged between the housing 1 and the end cover 2, thereby cooling the stator assembly installed in the housing 1. It can be understood that a liquid inlet 181 and a liquid outlet 182 are also arranged on the housing 1, and both the liquid inlet 181 and the liquid outlet 182 are communicated with the circulation groove 11, so as to realize the circulating flow of the coolant.

[0031] Based on the above, the adjacent parts of the housing 1 and the end cover 2 are joined by laser welding. That is, in this embodiment, the housing 1 and the end cover 2 are sealed by laser welding, so as to realize the sealed connection between the housing 1 and the end cover 2, and further avoid coolant leakage.

[0032] As described above, in this embodiment, the housing 1 and the end cover 2 are sealed by laser welding, so as to prevent coolant leakage. Since laser welding only needs to emit a laser beam to the adjacent parts of the housing 1 and the end cover 2 after pre-assembling the housing 1 and the end cover 2, without additionally assembling other sealing structures during the assembly process. Therefore, this embodiment can simplify the assembly process of the stator housing, thereby improving the production efficiency of the stator housing, and further improving the production efficiency of the axial flux motor. In addition, the sealing effect of the housing 1 and the end cover 2 joined by laser welding is better, so as to improve the yield rate of the produced stator housing.

[0033] In addition, it is worth noting that the welding method adopted in this embodiment is laser welding, rather than friction stir welding. Compared with friction stir welding, laser welding has lower welding difficulty and higher yield. Moreover, the welding speed of laser welding is relatively fast, which can improve production efficiency and thus be applicable to mass production of stator housings. In addition, since the laser head for emitting the laser beam does not need to be in direct contact with the position to be welded, this embodiment does not require special jigs and tools to clamp the pre-assembled stator housings together, thereby avoiding changes in the pose of the stator housings during the welding process. Furthermore, this embodiment can reduce production costs.

[0034] It is also worth noting that since this embodiment does not require additional assembly of a sealing structure on the stator housing, this embodiment can achieve the lightweight of the stator housing and thus the lightweight of the axial flux motor.

[0035] Furthermore, a weight reduction groove 22 is provided on the side of the end cover 2 away from the cooling cavity, so as to further achieve the lightweight of the stator housing and thus the lightweight of the axial flux motor.

[0036] Based on the content described above, this embodiment also provides an axial flux motor. The axial flux motor is in the form of S-R-S (stator-rotor-stator), that is, the rotor is arranged between two stators. For the two stators, the end covers 2 of the two stator housings are away from each other.

[0037] In this embodiment, a first ear plate 171 is provided on the housing 1. The first ear plate 171 is located on the side away from the end cover 2. A connection hole 1711 is provided on the first ear plate 171. The connection hole 1711 is used for fixedly connecting the two stators. Specifically, the connection holes 1711 of the two positioning housings of the axial flux motor are aligned, so that the two positioning housings can be fixedly connected by a connecting member passing through the two opposite connection holes 1711.

[0038] Moreover, in this embodiment, more than two first ear plates 171 are provided on the housing 1. Connection holes 1711 are provided on all the first ear plates 171. All the connection holes 1711 on one of the positioning housings of the axial flux motor correspond to all the connection holes 1711 on the other positioning housing one by one, so that the two positioning housings can be stably connected.

[0039] Exemplarily, in this embodiment, the connection hole 1711 is a bolt hole, and the two positioning housings can be fixedly connected by bolts passing through the two opposite connection holes 1711.

[0040] In addition to the first ear plate 171, a second ear plate 172 is also provided on the housing 1. The second ear plate 172 is located on the side close to the end cap 2. An installation hole 1721 is provided on the second ear plate 172. The installation hole 1721 is used for installing an axial flux motor. Exemplarily, in this embodiment, the installation hole 1721 is also a bolt hole, and the axial flux motor is installed by inserting bolts into the installation hole 1721.

[0041] In addition, in this embodiment, the housing 1 includes an inner ring 12 and an outer ring 13. The inner ring 12 and the outer ring 13 are coaxially arranged. Among them, a through hole 121 is provided on the inner ring 12, and the through hole 121 is used for installing the rotating shaft of the rotor. Based on the above, the flow channel 11 is formed between the inner ring 12 and the outer ring 13. The end cap 2 is sleeved on the outer periphery of the inner ring 12, and the outer ring 13 is sleeved on the outer periphery of the end cap 2. The outer ring 13 and the end cap 2 as well as the end cap 2 and the inner ring 12 are integrally welded by laser, that is, the adjacent parts of the outer ring 13 and the end cap 2 and the adjacent parts of the end cap 2 and the inner ring 12 are joined by laser welding, so that the end cap 2 and the housing 1 are hermetically connected sufficiently, and further effectively prevent the leakage of the coolant.

[0042] Furthermore, in this embodiment, a plurality of partition pieces 14 are provided in the flow channel 11. The plurality of partition pieces 14 divide the flow channel 11 into a zigzag flow path, so that the coolant can dissipate heat from the stator assembly in the housing 1 more sufficiently.

[0043] Specifically, in this embodiment, a partition plate 15 is provided in the housing 1. A flow channel 11 is provided on one side of the partition plate 15, and a cavity 16 for installing the stator assembly is formed on the other side of the partition plate 15. That is, in this embodiment, the stator assembly is arranged at a position in the housing 1 adjacent to the cooling cavity, and the coolant can flow in the cooling cavity to absorb the heat generated by the stator assembly.

[0044] Based on the above-mentioned content, support platforms 141 are provided on at least part of the partition pieces 14, and the end cap 2 is placed on the support platforms 141. That is, in this embodiment, the support platforms 141 provided in the flow channel 11 can support the end cap 2, so as to ensure that the structure of the stator housing is more stable. Moreover, the support platforms 141 can also ensure the flatness of the end cap 2, thereby further improving the sealing performance of the stator housing after welding.

[0045] In addition, at least part of the partition piece 14 is provided with a boss 142. For any one of the bosses 142, a first through hole 21 is correspondingly provided on the end cover 2. The boss 142 is inserted into the first through hole 21, so that the end face of the boss 142 is exposed through the first through hole 21 on the end cover 2. A second through hole 1421 is provided on the boss 142. One end of the second through hole 1421 extends to the end face of the end of the boss 142 exposed through the first through hole 21, and the other end of the second through hole 1421 communicates with the cavity 16, so that a fastener can be inserted into the cavity 16 through the second through hole 1421 later to fix the stator assembly.

[0046] Exemplarily, the second through hole 1421 is a bolt hole, and the fastener is a bolt. In this embodiment, the bolt can pass through the second through hole 1421 and penetrate into the cavity 16, so as to bolt and fix the stator assembly.

[0047] It can be understood that since laser welding is adopted in this embodiment, in addition to being able to weld the adjacent position of the end cover 2 and the housing 1, this embodiment can also weld the adjacent position of the first through hole 21 and the boss 142. Based on this, in this embodiment, the adjacent part of the boss 142 and the end cover 2 is also joined by laser welding, so as to seal the cavity 16.

[0048] Moreover, it should be noted that in this embodiment, both the housing 1 and the end cover 2 are made of aluminum. On the one hand, aluminum has the characteristics of being lightweight and easy to process. On the other hand, aluminum has good thermal conductivity and corrosion resistance, so that the housing 1 and the end cover 2 can be hermetically connected by laser welding.

[0049] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Axial flux motor stator housing, characterized in that: include: A housing (1), wherein a circulation groove (11) for circulating a cooling liquid is provided in the housing (1); and An end cover (2), the end cover (2) is sealed at one end of the shell (1), and the flow groove (11) is formed into a cooling cavity arranged between the shell (1) and the end cover (2), and the adjacent parts of the shell (1) and the end cover (2) are joined by laser welding.

2. The stator housing of the axial flux motor according to claim 1, characterized in that: The shell (1) and the end cover (2) are both made of aluminum.

3. The stator housing of the axial flux motor according to claim 1, characterized in that: The housing (1) comprises an inner ring (12) and an outer ring (13); the inner ring (12) and the outer ring (13) are coaxially arranged; the flow groove (11) is formed between the inner ring (12) and the outer ring (13); the end cover (2) is sleeved on the outer circumference of the inner ring (12); the outer ring (13) is sleeved on the outer circumference of the end cover (2); the outer ring (13) and the end cover (2) as well as the end cover (2) and the inner ring (12) are formed into one piece by laser welding.

4. The stator housing of the axial flux motor according to claim 1, characterized in that: A plurality of partition plates (14) are arranged in the flow groove (11), and the plurality of partition plates (14) divide the flow groove (11) into tortuous flow channels.

5. The stator housing of the axial flux motor according to claim 4, characterized in that: A support platform (141) is provided on at least part of the partition piece (14), and the end cover (2) is placed on the support platform (141).

6. The stator housing of the axial flux motor according to claim 4, characterized in that: A partition (15) is arranged in the shell (1), and the flow groove (11) is arranged on one side of the partition (15). The other side of the partition (15) is formed into a cavity (16) for installing the stator assembly. A boss (142) is arranged on at least part of the partition plate (14). For any one of the bosses (142), a first through-hole (21) is correspondingly arranged on the end cover (2). The boss (142) is inserted into the first through-hole (21). A second through-hole (1421) is arranged on the boss (142). One end of the second through-hole (1421) extends to the end surface of the boss (142) exposed at one end of the end cover (2) through the first through-hole (21), and the other end of the second through-hole (1421) is connected to the cavity (16).

7. The stator housing of the axial flux motor according to claim 6, characterized in that: The adjacent parts of the boss (142) and the end cover (2) are joined by laser welding.

8. The axial flux motor stator housing according to claim 1, characterized in that: A weight-reducing groove (22) is provided on the side of the end cover (2) facing away from the cooling chamber.

9. The stator housing of the axial flux motor according to claim 1, characterized in that: The shell (1) is provided with a first ear plate (171), the first ear plate (171) is located on a side away from the end cover (2), and the first ear plate (171) is provided with a connecting hole (1711).

10. The stator housing of the axial flux motor according to claim 1, characterized in that: The shell (1) is provided with a second ear plate (172), the second ear plate (172) is located on a side close to the end cover (2), and the second ear plate (172) is provided with a mounting hole (1721).

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