Disc type flux motor

Abstract

The utility model discloses a disc type magnetic flux motor including casing, stator assembly, rotor assembly and oil collection bin. Rotor assembly includes rotor shaft, two bearings and two rotor assemblies, and two rotor assemblies are separately arranged on the axial two sides of stator assembly, and rotor shaft is installed in casing through two bearings, and oil collection bin forms oil collection cavity, and the inside of stator assembly forms stator oil cavity, and rotor assembly and casing limit first rotor oil cavity, and first rotor oil cavity and oil inlet hole are communicated at bearing. The oil liquid in the utility model passes through oil inlet hole and enters bearing, and can lubricate and cool bearing. In the rotation process of rotor assembly, the oil liquid gathered at bearing is thrown into first rotor oil cavity under centrifugal force, and gradually covers at least axial side surface of rotor assembly, and is helpful to cool rotor assembly, thereby effectively guaranteeing the operation performance of rotor assembly. The oil collection cavity can cool and slow the recovered oil liquid, and ensures that the cooling effect of the circulating oil liquid is better.

Description

Technical Field

[0001] This utility model relates to the field of axial flux motor technology, specifically to a disc flux motor. Background Technology

[0002] A disc flux motor is a topology that combines a central stator with rotors on both sides. Because the stator is located in the center of the motor, and there is one rotor on each side, a double air gap structure is formed. The magnetic field is distributed axially, and the flux path goes directly from the rotor pole through the stator to the opposite rotor pole. Disc flux motors help to reduce axial length, improve stability, and feature high efficiency, high power density, and balanced load. Due to their high-performance output during continuous operation, disc flux motors require a well-designed cooling structure for effective cooling. Utility Model Content

[0003] The main objective of this invention is to propose a disc-type flux motor, and to provide a cooling structure suitable for disc-type flux motors.

[0004] To achieve the above objectives, this utility model proposes a disc-type flux motor, comprising:

[0005] The housing is provided with an oil inlet and an oil outlet that communicate with the interior of the housing.

[0006] The stator assembly is located within the aforementioned housing;

[0007] A rotor assembly, disposed within the housing, includes a rotor shaft, two bearings, and two rotor assemblies. The two rotor assemblies are respectively disposed on opposite axial sides of the stator assembly, and the rotor shaft is mounted to the housing via the two bearings; and,

[0008] An oil collection chamber is located at the bottom of the housing and has an oil collection cavity that communicates with the oil outlet. The oil collection cavity is used to communicate with the oil inlet through an external heat exchange component.

[0009] The stator assembly has stator oil cavities extending circumferentially and radially, respectively. The rotor assembly and the housing are at least axially spaced to define a first rotor oil cavity. The stator oil cavity and the first rotor oil cavity are respectively connected to the oil inlet and the oil outlet, and the first rotor oil cavity and the oil inlet are connected at the bearing.

[0010] Optionally, the oil inlet is located on one axial side of the housing and near the top of the housing; and / or,

[0011] The disc-type flux motor also includes a pump body, a cooler, and pipelines. The cooler forms a cooling chamber that communicates with the oil inlet. The pump body connects the oil collecting chamber and the cooling chamber through the pipelines to drive the oil in the oil collecting chamber into the cooling chamber through the pipelines.

[0012] Optionally, the housing is provided with two oil inlet channels corresponding to each of the two bearings, and each oil inlet channel includes:

[0013] An oil drain section extends axially and is disposed directly opposite the bearing on the corresponding side; and,

[0014] A connecting section connects the oil inlet and the corresponding oil outlet, and is adapted to extend the shape of the housing between the oil inlet and the corresponding oil outlet.

[0015] Optionally, the oil drain section is positioned directly opposite the ball bearing portion; and / or,

[0016] The oil drain section is adapted to extend in a ring shape along the circumference of the bearing; and / or,

[0017] The cross-sectional area of ​​the oil drain section is not greater than the cross-sectional area of ​​the connecting section.

[0018] Optionally, the rotor shaft includes:

[0019] The main body includes a base plate and two annular side plates that bend and extend axially from the radial outer edge of the base plate. The base plate and the annular side plates together define a groove that communicates with the first rotor oil chamber; and...

[0020] Two convex shafts protrude from the axial sides of the base plate, and two bearings are respectively positioned and installed at the two convex shafts.

[0021] Optionally, the rotor assembly includes:

[0022] A back plate, arranged in a ring shape, has its radially inner edge bent and extended toward the stator assembly to form an inner ring protrusion, the inner ring protrusion being connected to the radially outer edge of the annular side plate, and the radially outer edge of the back plate bent and extended toward the stator assembly to form an outer ring protrusion; and,

[0023] Multiple rotor cores are arranged radially on the side of the back plate facing the stator assembly and are radially constrained by the outer ring protrusion.

[0024] The inner ring protrusion is beveled at the bend to form an inclined guide surface, which transitions between the groove and the first rotor oil chamber.

[0025] Optionally, the rotor assembly and the housing are radially spaced to form a second rotor oil chamber, the second rotor oil chamber communicating with the first rotor oil chamber; and / or,

[0026] The rotor assembly and the stator assembly are axially spaced to form a third rotor oil chamber, which is in communication with the second rotor oil chamber.

[0027] Optionally, the stator assembly includes:

[0028] Multiple stator cores are arranged sequentially at intervals along the circumference, with slots formed between every two adjacent stator cores; and,

[0029] Multiple stator windings are wound one-to-one around the periphery of each stator core. Each pair of adjacent stator windings abuts against each other circumferentially to divide the slot at the location into a first slot and a second slot located on both sides of its axial direction.

[0030] The stator oil cavity includes an outer annular cavity formed on the radially outer side of the stator core, an inner annular cavity formed on the radially inner side of the stator core, a first slot, and a second slot. The outer annular cavity is connected to the oil inlet and the oil outlet, respectively. The first slot and the second slot are connected to the outer annular cavity and the inner annular cavity, respectively.

[0031] Optionally, the stator assembly further includes:

[0032] Two plates are respectively disposed on both sides of the axial direction of each of the stator cores. The plates, every two adjacent stator cores, and the corresponding two stator windings together enclose and define either the first slot space or the second slot space; and,

[0033] Multiple flow guides are protruding from the plate and are arranged one by one in each of the first slots and each of the second slots. The flow guides and the stator windings at their respective positions abut against each other along the axial direction to divide the corresponding first slot or second slot into two slot segments. Each slot segment is respectively connected to the outer ring cavity and the inner ring cavity.

[0034] Optionally, the oil collection tank and the housing are integrally formed, and at least the bottom chamber inside the housing constitutes the oil collection chamber;

[0035] The axial orthogonal projections of the stator assembly and the rotor assembly fall within the oil collecting cavity.

[0036] In the technical solution provided by this utility model, if the disc flux motor has a front side and a rear side located axially, then the oil cooled by the external heat exchange components enters the front bearing through the oil inlet hole, which first lubricates and cools the front bearing. During the rotation of the front rotor assembly, the oil accumulated at the front bearing is thrown into the front first rotor oil chamber by centrifugal force, and gradually covers at least the axial side surface of the front rotor assembly, which helps to cool the front rotor assembly, thereby effectively ensuring the operating performance of the front rotor assembly.

[0037] Simultaneously, the oil cooled by the external heat exchange components enters the rear bearing through the oil inlet, initially lubricating and cooling the rear bearing. During the rotation of the rear rotor assembly, the oil accumulated at the rear bearing is thrown into the oil chamber of the first rear rotor by centrifugal force, gradually covering at least the axial side surface of the rear rotor assembly, which helps to cool the rear rotor assembly and thus effectively ensures the operating performance of the rear rotor assembly.

[0038] In addition, the oil cooled by the external heat exchange components enters the stator oil cavity through the oil inlet, which can cool the stator assembly in both the circumferential and radial directions. This helps to increase the contact area between the oil and the internal components of the stator assembly, and ultimately effectively ensures the operating performance of the stator assembly.

[0039] During the rotation of the front and rear rotor assemblies, the oil at the top is carried to the bottom, allowing the hotter oil that has exchanged heat with the front and rear rotor assemblies to be recovered into the oil collection tank. The oil storage space in the collection chamber allows for some cooling and energy recovery of the recovered oil. The oil in the collection chamber then flows to the heat exchange assembly, where it is cooled more thoroughly, ensuring better cooling of the front bearing, front rotor assembly, rear bearing, and rear rotor assembly. Attached Figure Description

[0040] 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.

[0041] Figure 1 A perspective view of an embodiment of the disc flux motor provided by this utility model;

[0042] Figure 2 for Figure 1 A three-dimensional schematic diagram of a mid-disc flux motor from another perspective;

[0043] Figure 3 for Figure 1 Exploded view of the main structure of a medium-disc flux motor;

[0044] Figures 4 to 5 All Figure 1 A radial section diagram of the upper region of a medium-disc flux motor;

[0045] Figure 6 for Figure 3 A three-dimensional schematic diagram of the central rotor assembly from a first-view perspective;

[0046] Figure 7 for Figure 3 A three-dimensional schematic diagram of the central rotor assembly from another perspective;

[0047] Figure 8 for Figure 3 Exploded view of the main structure of the rotor assembly;

[0048] Figure 9 for Figure 3 A three-dimensional schematic diagram of the middle stator assembly from a first-view perspective;

[0049] Figure 10 for Figure 3 A three-dimensional schematic diagram of the middle stator assembly from another perspective;

[0050] Figure 11 for Figure 3 A radial section diagram of the middle stator assembly;

[0051] Figure 12 for Figure 11 Enlarged structural diagram at point A;

[0052] Figure 13 Figure 3 Axial cross-sectional view of the middle stator assembly;

[0053] Figure 14 for Figure 13 Enlarged structural diagram at point B;

[0054] Figure 15 for Figure 9 Schematic diagram of the middle plate and flow guide;

[0055] Figure 16 for Figure 11 A three-dimensional schematic diagram of the mid-arc shell plate.

[0056] Explanation of icon numbers:

[0057] 100 Housing; 101 Mounting cavity; 110 Front housing; 111 Front end housing; 112 Front side housing; 120 Rear housing; 121 Rear end housing; 122 Rear side housing; 130 Oil inlet; 140 Oil outlet; 151 First connecting section; 152 First oil drain section; 153 Second connecting section; 154 Third connecting section; 155 Fourth connecting section; 156 Fifth connecting section; 157 Second oil drain section; 200 Stator assembly ; 210 Outer shell; 211 Main shell; 211a Oil inlet; 211b Oil outlet; 212 Arc-shaped shell plate; 213 Oil passage; 214a First injection hole; 214b Second injection hole; 214c Third injection hole; 215 Outer ring cavity; 220 Inner shell; 221 Inner ring cavity; 230 Plate; 240 Flow guide; 241 First flow guide; 242 Second flow guide; 243a Main Guide section; 243b Bending section; 250 Stator core; 251 First slot; 251a Upstream slot; 251b Downstream slot; 252 Second slot; 260 Stator winding; 300 Rotor assembly; 310 Rotor shaft; 311 Main body; 311a Base plate; 311b Annular side plate; 311c Groove; 312 Front convex shaft; 313 Rear convex shaft; 321 Front bearing; 322 Rear bearing; 3 31 Front rotor assembly; 332 Rear rotor assembly; 333 Back plate; 333a Inner ring protrusion; 333b Outer ring protrusion; 333c Guide surface; 334 Rotor core; 341 First rotor oil chamber; 342 Second rotor oil chamber; 343 Third rotor oil chamber; 400 Oil collection tank; 410 Oil collection chamber; 510 Pump body; 520 Cooler; 530 Piping; C1 Reference outer circumference; C2 Reference inner circumference.

[0058] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0059] 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.

[0060] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0061] 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.

[0062] Please see Figures 1 to 16 The disc flux motor provided by this utility model includes at least a housing 100, a stator assembly 200, a rotor assembly 300, and an oil collection tank 400.

[0063] For ease of understanding, the following embodiments will use a disc flux motor and its internal components, such as the rotor assembly 300 and stator assembly 200, as examples, each having corresponding axial, radial, and circumferential directions. In practical applications, the radial direction of the disc flux motor generally extends along the direction of gravity, meaning the disc flux motor has an upper and lower side located in the direction of gravity. Furthermore, the axial direction of the disc flux motor generally has a front and a rear side. The front side of the disc flux motor generally faces primarily towards the user.

[0064] Therefore, a mounting cavity 101 is formed inside the housing 100. Generally, to facilitate the assembly and disassembly of internal components such as the rotor assembly 300 and the stator assembly 200, the housing 100 can be constructed by detachably connecting at least two housing units. The specific structural form of each housing unit is not limited. Furthermore, the specific connection direction of each housing unit is not limited.

[0065] For example Figures 1 to 16 As shown, the shell unit is specifically configured as two, namely a front shell 110 and a rear shell 120. The front shell 110 and the rear shell 120 are respectively recessed on their adjacent sides to form mounting grooves. After the front shell 110 and the rear shell 120 are assembled and secured along the axial direction, the two mounting grooves together enclose and define the mounting cavity 101.

[0066] Of course, the above does not constitute a limitation on the assembly of the front housing 110 and the rear housing 120, or the mounting cavity 101. In practical applications, the front housing 110 and the rear housing 120 may not be directly connected; for example, they can be indirectly connected through the shell structure of the stator assembly 200. When the stator assembly 200 includes the outer ring housing 210 as described below, the front housing 110 and the rear housing 120 can be respectively disposed on both axial sides of the outer ring housing 210 and jointly clamp the outer ring housing 210, so that the two mounting slots together enclose the mounting cavity 101.

[0067] To define the mounting groove, the front housing 110 may include a front end housing 111 located axially forward and a front side housing 112 that surrounds the radial outer edge of the front end housing 111 circumferentially. The front end housing 111 and the front side housing 112 together define the mounting groove. Similarly, the rear housing 120 may include a rear end housing 121 located axially rearward and a rear side housing 122 that surrounds the radial outer edge of the rear end housing 121 circumferentially. The rear end housing 121 and the rear side housing 122 together define the mounting groove. During assembly, the front side housing 112 and the rear side housing 122 are joined together to ensure that the two mounting grooves together form a mounting cavity 101 of suitable size and shape.

[0068] The housing 100 is provided with an oil inlet 130 for injecting oil into the mounting cavity 101 and an oil outlet 140 for discharging oil from the mounting cavity 101. The oil inlet 130 and the oil outlet 140 can be located at any suitable position on the housing 100.

[0069] Since the oil outlet 140 and the oil collection tank 400 need to be connected, the orientation of the oil outlet 140 can be adapted to the orientation of the oil collection tank 400 to ensure that the structures of the oil outlet 140 and the oil collection tank 400 are compact and to avoid forming an excessively long flow path between them.

[0070] The oil collection chamber 400 can also be set at any suitable location on the housing 100 according to actual needs. However, it is generally located at the bottom of the housing 100. An oil collection cavity 410 is formed inside the oil collection chamber 400. The oil collection cavity 410 is connected to the oil outlet 140. In this way, the oil in the mounting cavity 101 can flow into the oil collection cavity 410 under gravity through the oil outlet 140. Since the oil collection cavity 410 has a sufficiently large space, when oil with high kinetic and potential energy flows into the oil collection cavity 410, it can slowly settle within it. During this settling process, the relatively high-temperature oil, after heat exchange in the mounting cavity 101, gradually cools down. Furthermore, any impurities that may be mixed into the oil can precipitate out within the oil collection cavity 410, achieving filtration to a certain extent.

[0071] Before returning to the mounting cavity 101 via the oil inlet 130, the oil stored in the oil collecting chamber 410 can be cooled by heat exchange components, such as those provided outside the housing 100. In this case, the disc flux motor may also include a heat exchange component. This heat exchange component includes a pump body 510, a cooler 520, and a pipe 530. The cooler 520 forms a cooling cavity communicating with the oil inlet 130. The pump body 510 connects the oil collecting chamber 410 and the cooling cavity via the pipe 530 to drive the oil in the oil collecting chamber 410 into the cooling cavity through the pipe 530.

[0072] The oil collection tank 400 and the housing 100 can be integrally formed. In this case, the bottom shell of the housing 100 directly constitutes the oil collection tank 400. At least the bottom chamber of the mounting cavity 101 directly constitutes the oil collection cavity 410. Alternatively, the oil collection tank 400 and the housing 100 can also be formed by detachable or non-detachable connection after being formed separately.

[0073] Similarly, since the oil inlet 130 and the cooler 520 need to be connected, the orientation of the oil inlet 130 can be adapted to the orientation of the cooler 520 to ensure that the structures of the oil inlet 130 and the cooler 520 are as compact as possible, and to avoid forming an excessively long flow path between them.

[0074] The cooler 520 can also be installed at any suitable location on the housing 100 as needed. However, generally, the cooler 520 can be installed in the upper part of the housing 100. For example, the cooler 520 can protrude from the front housing 112 and / or the rear housing 122. Alternatively, the cooler 520 can protrude from the front housing 111 or the rear housing 121.

[0075] To minimize the impact of the cooler 520 on the front structure of the disc flux motor, the cooler 520 can be specifically positioned at the rear end housing 121, preferably near the upper part of the rear end housing 121. This allows the oil inlet 130 and oil outlet 140 to be radially spaced. When oil flows from the oil inlet 130 through the mounting cavity 101 to the oil outlet 140, it can pass relatively completely through the stator assembly 200 and / or rotor assembly 300, increasing the cooling area.

[0076] like Figure 2 As shown, the cooler 520, pump body 510, and oil collection tank 400 can be arranged in sequence roughly along the direction of gravity. This ensures that the center of gravity of the disc flux motor is as close as possible to its central axis, which is more conducive to the stable operation of the whole machine.

[0077] In view of the above, in order to achieve a better cooling effect for the disc flux motor as a whole, the cooling structure of the disc flux motor in this design is mainly reflected in two aspects: firstly, the design of the cooling oil circuit at 300 on the rotor assembly; secondly, the design of the cooling oil circuit at 200 on the stator assembly.

[0078] Firstly, the cooling design at point 300 of the rotor assembly is as follows:

[0079] This application primarily addresses a single-stator, dual-rotor motor. In this case, the rotor assembly 300 is housed within the housing 100. The rotor assembly 300 includes a rotor shaft 310, two bearings, and two rotor assemblies. The two rotor assemblies are located on opposite axial sides of the stator assembly 200. The rotor shaft 310 is mounted to the housing 100 via the two bearings.

[0080] Specifically, the housing has axial holes at corresponding locations (generally at the central axis) of the front and rear housings 111 and 121, respectively. The rotor shaft 310 is rotatably mounted in the shaft holes via two bearings about its own axis. The stator assembly 200 and the aforementioned rotor assembly are generally disc-shaped and are arranged opposite each other axially.

[0081] For ease of understanding, the two rotor assemblies are distinguished as the front rotor assembly 331 located on the front side and the rear rotor assembly 332 located on the rear side.

[0082] A gap is formed between the front rotor assembly 331 and the front end housing 111, and a gap is formed between the rear rotor assembly 332 and the rear end housing 121. The mounting cavity 101 defines a first rotor oil cavity 341 at each of the two gaps. The first rotor oil cavity 341 is connected to the oil inlet 130 and the oil outlet 140. In this way, when the lower temperature oil enters the first rotor oil cavity 341 through the oil inlet 130, it can cover the front surface of the front rotor assembly 331 and the rear surface of the rear rotor assembly 332 as much as possible under the rotation of the rotor assembly 300. This achieves cooling of the axial side surfaces of the front rotor assembly 331 and the rear rotor assembly 332, respectively. Then, a higher temperature oil is formed. The higher temperature oil can be discharged from the mounting cavity 101 through the oil outlet 140 and enter the oil collection cavity 410.

[0083] Furthermore, the first rotor oil chamber 341 and the oil inlet 130 are connected at the bearing. That is, the oil entering the first rotor oil chamber 341 from the oil inlet 130 is designed to necessarily pass through the bearing. In this way, while achieving the above-mentioned purpose, the oil can also lubricate and cool the bearing.

[0084] Therefore, in order to reduce excessive restrictions on the location of the oil inlet hole 130, in a further design, the housing 100 is provided with two oil inlet channels corresponding to the two bearings. By individually designing the length, cross-sectional area, and shape of the oil inlet channels, they can be adapted to oil inlet holes 130 and bearings in different positions, thus better connecting the oil inlet holes 130 and bearings.

[0085] Each oil inlet channel includes an oil drain section and a connecting section. The oil drain section extends axially and is positioned opposite the corresponding bearing. That is, the oil drain section primarily guides the oil to the bearing more accurately and specifically. The connecting section connects the oil inlet 130 and the corresponding oil drain section. The connecting section is adapted to the shape and arrangement of the housing 100 between the oil inlet 130 and the corresponding oil drain section. That is, the connecting section primarily serves to adaptably connect the bearing and the oil inlet 130.

[0086] For ease of understanding, the two bearings will be referred to as front bearing 321 and rear bearing 322 below. The types of front bearing 321 and rear bearing 322 are not necessarily the same; they can be different depending on actual needs. For example, front bearing 321 can be a double-row angular contact ball bearing.

[0087] When the oil inlet hole 130 is axially opened in the rear end housing 121 as described above:

[0088] First, please combine Figures 2 to 4 The oil inlet channel located between the oil inlet hole 130 and the rear bearing 322 includes a first connecting section 151 and a first oil discharge section 152. The first connecting section 151 is radially formed at the rear end housing 121 to accommodate the radial path difference between the oil inlet hole 130 and the rear bearing 322. The first oil discharge section 152 extends axially, connecting the first connecting section 151 and the rear bearing 322, ensuring that the oil at the oil inlet hole 130 passes through the first connecting section 151, the first oil discharge section 152, and the rear bearing 322 before entering the first rotor oil chamber 341 located between the rear rotor assembly 332 and the rear end housing 121.

[0089] Next, please combine Figures 2 to 3 , Figure 5The oil inlet channel located between the oil inlet hole 130 and the front bearing 321 includes a second connecting section 153, a third connecting section 154, a fourth connecting section 155, a fifth connecting section 156, and a second oil outlet section 157. The second connecting section 153 extends radially and is located at the rear end housing 121, and is approximately collinear with the extension direction of the first connecting section 151. The third connecting section 154 extends axially and is located at the rear side housing 122. The fourth connecting section 155 extends axially and is located at the front side housing 112, and communicates directly or indirectly with the third connecting section 154 through a channel located at the outer ring housing 210. The fifth connecting section 156 extends radially and is located at the front end housing 111. The second connecting section 153, the third connecting section 154, the fourth connecting section 155, and the fifth connecting section 156 are adapted to the axial and radial path differences between the oil inlet hole 130 and the second oil outlet section 157, respectively. The second oil drain section 157 extends axially, connecting the fifth connecting section 156 and the front bearing 321, ensuring that the oil at the oil inlet 130 enters the first rotor oil chamber 341 located between the front rotor assembly 331 and the front end housing 111 after passing through the second connecting section 153, the third connecting section 154, the fourth connecting section 155, the fifth connecting section 156, the second oil drain section 157, and the front bearing 321.

[0090] Of course, the above are just two examples of how to set up two oil inlet channels, but they are not a limitation. The two oil inlet channels can be set up in other ways according to actual needs.

[0091] The correspondence between the first oil discharge section 152 and the rear bearing 322, and between the second oil discharge section 157 and the front bearing 321, is not restricted, as long as it ensures that oil can enter the front bearing 321 and the rear bearing 322 respectively. Optionally, the oil discharge sections are positioned directly opposite the bearing balls. That is, the first oil discharge section 152 is positioned as directly as possible opposite the bearing balls of the rear bearing 322, and the second oil discharge section 157 is positioned as directly as possible opposite the bearing balls of the front bearing 321. In this way, the oil can be directly introduced into the bearing balls of the front bearing 321 and the rear bearing 322 to lubricate them. Furthermore, under the rolling action of the bearing balls, the remaining oil after lubrication is squeezed out from the front bearing 321 and the rear bearing 322 respectively, and flows into the two first rotor oil chambers 341.

[0092] The aforementioned orthogonal arrangement means that the orthogonal projection of at least the outlet end of the first oil discharge section 152 along the axial direction falls within the area where the balls of the rear bearing 322 are positioned. Similarly, the orthogonal projection of at least the outlet end of the second oil discharge section 157 along the axial direction falls within the area where the balls of the front bearing 321 are positioned.

[0093] And / or, the oil drain section can extend in a straight hole shape along the axial direction. And, depending on actual needs, multiple oil drain sections can be spaced apart circumferentially at the bearing location. Alternatively, the oil drain sections can be adapted to extend in a ring shape along the circumference of the bearing. That is, the first oil drain section 152 extends in a ring shape along the circumference of the rear bearing 322. The second oil drain section 157 extends in a ring shape along the circumference of the front bearing 321. In this way, the oil entering the bearing through the oil drain section can spread throughout the entire bearing as quickly as possible.

[0094] And / or, the cross-sectional area of ​​the oil drain section is not greater than the cross-sectional area of ​​the connecting section. When the cross-sectional area of ​​the oil drain section is set to be smaller, on the one hand, the oil can be guided to a designated area in a concentrated manner, and on the other hand, it helps to increase the oil flow rate to a certain extent. In addition, setting the cross-sectional area of ​​the oil drain section to be smaller also helps to reduce excessive interference to the structure of the housing 100 at the bearing.

[0095] Based on one or more of the above embodiments, the rotor shaft 310 may then include a main body portion 311 and two convex shaft portions.

[0096] The main body 311 includes a base plate 311a and two annular side plates 311b that bend and extend axially from the radial outer edge of the base plate 311a to both sides. The base plate 311a and the annular side plates 311b together define a groove 311c. The groove 311c is interconnected. A first rotor oil chamber 341 is formed. Two convex shafts protrude from both sides of the base plate 311a, and two bearings are respectively positioned and mounted at the two convex shafts.

[0097] The two convex shaft portions can be a front convex shaft portion 312 for mounting the front bearing 321 and a rear convex shaft portion 313 for mounting the rear bearing 322. In the main body 311, the groove 311c formed by the base plate 311a and the annular side plate 311b can accommodate a certain amount of oil. When the oil is squeezed out by the rear bearing 322, it can flow into the rear groove 311c and accumulate to a certain quantity. Similarly, when the oil is squeezed out by the front bearing 321, it can flow into the front groove 311c and accumulate to a certain quantity. The oil accumulated in the groove 311c allows at least a portion of the front bearing 321, the front convex shaft portion 312, the rear bearing 322, and the rear convex shaft portion 313 to be immersed in the oil, achieving better lubrication. On the other hand, the oil accumulated in the groove 311c can form enough mass to be centrifugally thrown away after the rotor assembly 300 rotates, spreading to the front surface of the front rotor assembly 331 and the rear surface of the rear rotor assembly 332.

[0098] Next, please combine Figures 6 to 8 The rotor assembly may include a back plate 333 and multiple rotor cores 334.

[0099] The back plate 333 is arranged in a ring shape. The radial inner edge of the back plate 333 bends and extends toward the side where the stator assembly 200 is located to form an inner ring protrusion 333a. The inner ring protrusion 333a is connected to the radial outer edge of the annular side plate 311b. The radial outer edge of the back plate 333 bends and extends toward the stator assembly 200 to form an outer ring protrusion 333b.

[0100] Multiple rotor cores 334 are arranged radially on one side of the back plate 333 facing the stator assembly 200 and are radially constrained by the outer ring protrusion 333b.

[0101] It is understood that the inner ring protrusion 333a of the back plate 333 is mainly used for axial contact with the annular side plate 311b. Through the two inner ring protrusions 333a of the two back plates 333, the two back plates 333 can be sufficiently separated, leaving enough space for the assembly of the two sets of stator cores 250 and the stator assembly 200.

[0102] The outer ring protrusion 333b of the back plate 333 can provide radial and outward constraint to each stator core 250 assembled to the back plate 333, which helps to stabilize the assembly of the stator core 250 and the back plate 333.

[0103] Next, the bend in the inner ring protrusion 333a is beveled to form an inclined guide surface 333c. The guide surface 333c transitions between the groove 311c and the first rotor oil cavity 341. It can be understood that the oil accumulated in the groove 311c, driven by the rotation of the rotor assembly 300, generally moves along the back plate 333 from its radial inner edge to its radial outer edge. That is, it moves from the inner ring protrusion 333a of the back plate 333 towards the outer ring protrusion 333b. By beveling the bend in the inner ring protrusion 333a to form the inclined guide surface 333c, the oil in the groove 311c can be more smoothly guided along the guide surface 333c into the first rotor oil cavity 341.

[0104] Based on one or more of the above embodiments, in a further embodiment, the rotor assembly and housing 100 are radially spaced to form a second rotor oil chamber 342. The second rotor oil chamber 342 is connected to the first rotor oil chamber 341. As can be seen from the above, the first rotor oil chamber 341 mainly cools the front surface of the front rotor assembly 331 and the rear surface of the rear rotor assembly 332. The second rotor oil chamber 342 here can then cool the radial outer edges of the front rotor assembly 331 and the rear rotor assembly 332, thus cooling the rotor assembly 300 from at least two directions.

[0105] And / or, the rotor assembly and stator assembly 200 are axially spaced to form a third rotor oil chamber 343. The third rotor oil chamber 343 is connected to the second rotor oil chamber 342. The third rotor oil chamber 343 here can then cool the rear surface of the front rotor assembly 331 and the front surface of the stator assembly 200, as well as the rear surface of the rear rotor assembly 332 and the rear surface of the stator assembly 200, thereby cooling the rotor assembly 300 from at least three directions and improving the cooling intensity of the rotor assembly 300 and the stator assembly 200.

[0106] The cooling design at point 200 on the stator assembly is as follows:

[0107] The stator assembly 200 in this design is a yokeless stator assembly 200. The stator assembly 200 includes at least a plurality of stator cores 250 and a plurality of stator windings 260.

[0108] Multiple stator cores 250 are arranged radially about the central axis. A slot is defined between two adjacent stator cores 250. Multiple stator windings 260 are wound one-to-one around each stator core 250. Each pair of adjacent stator windings 260 abuts against each other circumferentially. In this way, a slot at a given location can be divided into a first slot 251 and a second slot 252 located on either side of its axial direction. When the coils in the stator windings 260 are relatively tightly wound, the first slot 251 and the second slot 252 are not substantially directly connected radially.

[0109] Based on this, to better secure the multiple stator cores 250 and multiple stator windings 260, the yokeless stator assembly 200 may further include an outer ring housing 210 and an inner ring housing 220. It can be understood that the outer ring housing 210 is the housing structure mainly disposed radially outside each stator core 250. The inner ring housing 220 is the housing structure mainly disposed radially inside each stator core 250. During assembly, an assembly area is defined between the inner ring housing 220 and the outer ring housing 210, and each stator core 250 and each stator winding 260 are disposed within the assembly area.

[0110] Each stator core 250 and the outer ring housing 210 are radially spaced. This space extends along the outer periphery of each stator core 250, forming an outer ring cavity 215. Each stator core 250 and the inner ring housing 220 are radially spaced. This space extends along the inner periphery of each stator core 250, forming an inner ring cavity 221.

[0111] Each slot is radially connected to the outer ring cavity 215 and the inner ring cavity 221.

[0112] The outer ring housing 210 is provided with an oil inlet 211a and an oil outlet 211b. The orientation of the oil inlet 211a is not limited, but generally, it can be located at the top of the outer ring housing 210. The oil inlet 211a is directly or indirectly connected to the oil inlet 130 mentioned above. For example, when a second connecting section 153 and a third connecting section 154 are provided as described above, the oil inlet 211a is indirectly connected to the oil inlet 130 through the second connecting section 153 and the third connecting section 154.

[0113] The orientation of the oil outlet 211b is not limited, but generally, it can be located at the bottom of the outer casing 210. The oil outlet 211b communicates with the oil outlet 140 mentioned above. It is understood that since the oil outlet 140 also needs to guide the oil from the rotor assembly 300 to the oil collecting chamber 410, the cross-sectional area of ​​the oil outlet 140 is generally larger than that of the oil outlet 211b. The oil outlet 211b can be two different opening structures from the oil outlet 140. Alternatively, the oil outlet 211b can be directly defined by a local area within the oil outlet 140.

[0114] The oil inlet 211a, outer annular cavity 215, each slot (including the first slot 251 and the second slot 252), inner annular cavity 221, and oil outlet 211b are connected in sequence. When the oil enters the oil inlet 211a through the oil inlet 130, the oil can sequentially cool the outer radial side, both circumferential sides, and the inner radial side of each stator core 250 and each stator winding 260.

[0115] Next, in a further embodiment, the yokeless stator assembly 200 also includes at least one plate 230. Generally, two plates 230 are provided, and the two plates 230 are respectively disposed on both sides of each stator core 250 and each stator winding 260. Axial clamping and limiting are provided for each stator core 250 and each stator winding 260.

[0116] Specifically, such as Figures 9 to 16 As shown, two plates 230 can be respectively disposed on both axial sides of the inner ring housing 220. This allows the inner ring housing 220 to be clamped between the two plates 230. The radial outer edges of the two plates 230 abut against the inner shell wall of the outer ring housing 210. A portion of the radial outer edge of the plates 230 extends outward to form a connecting lug. This connecting lug and a portion of the outer ring housing 210 are stacked axially. The stacked portion is connected and fixed by means such as screw fastening.

[0117] The yokeless stator assembly 200 also includes multiple flow guides 240. Each flow guide 240 is disposed corresponding to a first slot 251 and / or a second slot 252. The flow guide 240 protrudes from the surface of the plate 230 and abuts radially against the stator winding 260 at its location, thereby dividing the first slot 251 or second slot segment at its location into an upstream slot segment 251a and a downstream slot segment 251b arranged sequentially along the circumference. The upstream slot segment 251a and the downstream slot segment 251b are not directly connected along the circumference. The upstream slot segment 251a and the downstream slot segment 251b are respectively used for oil flow.

[0118] In the technical solution provided by this utility model, the plate 230 assists in the assembly of multiple stator cores 250 and multiple stator windings 260, which helps to ensure the stable assembly of the multiple stator cores 250 and multiple stator windings 260.

[0119] The plate 230 and the guide member 240 together define a first slot 251 and a second slot 252 for guiding the flow between the slots of each stator core 250 and each stator winding 260. Furthermore, an upstream slot segment 251a and a downstream slot segment 251b are defined within each first slot 251 or second slot 252, which can effectively guide the cooling oil to flow from the radial outside to the radial inside along a precise path. This helps to achieve greater heat exchange contact with the peripheral surfaces of each stator core 250 and each stator winding 260, thereby achieving a better cooling effect for each stator core 250 and each stator winding 260.

[0120] Furthermore, compared to directly introducing cooling oil into the slots of each stator core 250 and each stator winding 260, this application forms slots that are closer to rectangular by setting the plate 230 and the guide 240, which supports the stator winding 260 as a flat wire winding and helps to improve the slot fill factor.

[0121] A higher fill factor helps reduce copper losses and increase torque density. Combined with effective cooling and heat dissipation between the slots by the cooling oil, this helps improve the overall operating performance of the axial flux motor and ultimately enhances the reliability of the entire machine.

[0122] The aforementioned plate 230 effectively covers the first slot 251 and the second slot 252 along the axial direction, respectively. At this time, the arrangement of the guide member 240 on the plate 230 is not limited.

[0123] The flow guide 240 can be configured only for the first slot 251. Alternatively, the flow guide 240 can be configured only for the second slot 252. However, generally, such as... Figures 9 to 16 As shown, the flow guide 240 is provided in both the first slot 251 and the second slot 252 as much as possible.

[0124] Taking the first slot 251 as an example, the guide member 240 can be set only for a portion of the first slot 251. Or as... Figures 9 to 16 As shown, the flow guide 240 is provided for all the first slots 251.

[0125] The aforementioned flow guide 240 can be integrally formed with the plate 230. This helps simplify the forming process of both the flow guide 240 and the plate 230, and ensures that the materials, structural strength, etc., of the flow guide 240 and the plate 230 are basically consistent.

[0126] Alternatively, the aforementioned flow guide 240 and plate 230 can be formed by detachable or non-detachable connection after separate molding. This would increase the diversity of molding methods for both the flow guide 240 and plate 230, and improve the flexibility of material selection.

[0127] As described above, the guide member 240 is disposed within the first slot 251 or the second slot 252, and axially abuts against the axial surfaces of the two stator windings 260 at its location. Taking the first slot 251 as an example:

[0128] At this point, the guide member 240 can be located approximately at the middle position of the first slot 251 in the circumferential direction, that is, it is basically simultaneously abutting the axial surfaces of the two stator windings 260. This makes the circumferential widths of the upstream slot segment 251a and the downstream slot segment 251b separated by the guide member 240 in the first slot 251 approximately the same.

[0129] Alternatively, the guide member 240 can be circumferentially offset within the first slot 251. That is, the guide member 240 essentially abuts against the axial surface of one of the two stator windings 260. This further facilitates a tighter abutment between the guide member 240 and the stator winding 260. This allows the upstream slot segment 251a and the downstream slot segment 251b separated by the guide member 240 within the first slot 251 to have different circumferential widths.

[0130] Since each flow guide 240 is set one-to-one with each slot (including the first slot 251 and the second slot 252), it is equivalent to each flow guide 240 being arranged radially with the central axis as the center. As can be seen from the above, in use, the disc flux motor is generally installed vertically. At this time, the yokeless stator assembly 200 has an upper region and a lower region.

[0131] It should be noted that the upper and lower regions of the yokeless stator assembly 200 are not limited to two semicircular regions. Depending on the needs, the space occupied by the upper region can be greater than, equal to, or less than the space occupied by the lower region.

[0132] However, generally speaking, the central arc angle of the upper region of the yokeless stator assembly 200 is no greater than 180°. That is, the upper region can be a semi-circular region or a sector-shaped region with a central arc angle of less than 180°.

[0133] Next, each guide member 240 includes a first guide member 241 located in the upper region of the yokeless stator assembly 200, and a second guide member 242 located in the lower region of the yokeless stator assembly 200. As can be seen from the above, the number of first guide members 241 is not limited to being absolutely equal to the number of second guide members 242. It can be flexibly adjusted according to actual needs, as long as the first guide member 241 is always located above the second guide member 242.

[0134] As described above, when the oil enters the upper section of the outer annular cavity 215 through the oil inlet 211a, it is guided downwards from the first slot 251 / second slot 252 / upstream slot 251a / downstream slot 251b located in the upper region to the upper section of the inner annular cavity 221. Then, under the action of gravity, the oil flows along the inner annular cavity 221 to the first slot 251 / second slot 252 / upstream slot 251a / downstream slot 251b in the lower region, and is guided to the lower section of the outer annular cavity 215, and finally discharged outwards through the oil outlet 211b.

[0135] Please refer to the following for details. Figure 15 At least a portion of the first flow guide 241 includes a main flow section 243a and a bent section 243b. The main flow section 243a extends radially in a generally straight direction. The radially inner end of the main flow section 243a bends towards the circumferential side to form the bent section 243b. For each first flow guide 241 with the bent section 243b, the bent section 243b bends towards the same circumferential side. The main flow section 243a guides the oil from the outer annular cavity 215 radially in a generally straight direction towards the inner annular cavity 221. When the oil flows to the bent section 243b, the bent section 243b deflects and guides the oil towards the radially inner edge of the adjacent stator core 250 and stator winding 260, increasing the contact area between the oil and the radially inner edge of the stator core 250 and stator winding 260. The oil then flows into the inner annular cavity 221.

[0136] Each of the aforementioned bent segments 243b extends at least to the radially inner side of the stator core 250 located nearby. That is, at least radially, the orthographic projection area of ​​the bent segment 243b falls within the region of the radially inner edge of the nearby stator core 250.

[0137] In the above description, the first guide member 241 with the bent section 243b can be located in a central or upper position relative to the first guide member 241 without the bent section 243b. For example, the first guide member 241 without the bent section 243b can be distributed on both circumferential sides of the first guide member 241 with the bent section 243b. In this way, the first guide member 241 with the bent section 243b can be positioned as high as possible and close to the oil inlet 211a, which can better guide the oil downward.

[0138] Furthermore, the radial outer edges of each stator core 250 are located at the same reference outer circumference line C1, and the radial outer ends of each first guide member 241 protrude outward beyond the reference outer circumference line C1. In this way, the portion of each first guide member 241 protruding outward beyond the reference outer circumference line C1 can roughly divert the oil in the outer ring cavity 215, and better guide it into the respective upstream tank sections 251a and downstream tank sections 251b located on the upper side.

[0139] The radial outer edges of each stator core 250 are located at the same reference outer circumference line C1. The radial outer ends of each second guide member 242 do not extend beyond the reference outer circumference line C1. In this way, it can be avoided that after the oil flows to below the reference outer circumference line C1 under the action of gravity, it will be excessively interfered by the radial outer ends of each second guide member 242, which would cause the oil to enter the oil collecting cavity 410 with an overly tortuous and long path, thus reducing the oil recovery effect in the oil collecting cavity 410.

[0140] The radial inner edges of each stator core 250 are located at the same reference inner circumference line C2. The radial inner ends of each second guide member 242 protrude inward beyond the reference inner circumference line C2. Similarly, the portion of each second guide member 242 protruding beyond the reference inner circumference line C2 can roughly divert the oil in the inner annular cavity 221, better guiding it to the respective upstream channel section 251a and downstream channel section 251b located on the lower side.

[0141] Based on one or more of the above embodiments, the oil entering through the oil inlet 211a can directly enter the outer annular cavity 215. Alternatively, in a further embodiment, an oil passage 213 is provided inside the outer ring housing 210. The oil passage 213 extends in a notched annular shape in the upper section of the outer ring housing 210. An oil injection hole is provided through the inner wall of the outer ring housing 210. The oil passage 213 connects the oil inlet 211a and the oil injection hole.

[0142] The oil passage 213 is mainly used to evenly distribute the oil to each injection hole. The injection holes are mainly used to spray the oil from the oil passage 213 into the outer annular cavity 215. The oil passage 213 is not limited to encircling the entire circumference of the outer housing 210. Instead, it is designed as a notched ring corresponding to the upper section of the outer housing 210. In this case, the arc angle of the oil passage 213 can be set to no more than 180°, sufficient to spray the oil into the upper section of the outer annular cavity 215 as described above.

[0143] It should be noted that the upper section of the outer ring housing 210, the upper section of the outer ring cavity 215, and the oil passage 213 have roughly the same arc center angle. Their orientations also roughly correspond. However, this orientation and arc center angle are not absolutely related to the upper region of the aforementioned yokeless stator assembly 200; they are set independently.

[0144] The forming method of the oil passage 213 is not limited. In one embodiment, the outer shell 210 may include a main shell 211 arranged in an annular shape and an arc-shaped shell plate 212. The inner sidewall of the main shell 211 is recessed with an oil groove. The oil groove extends circumferentially. The arc-shaped shell plate 212 covers the opening of the oil groove. The arc-shaped shell plate 212 and the oil groove of the main shell 211 together enclose and define the aforementioned oil passage 213.

[0145] like Figure 16 As shown, the arc-shaped shell plate 212 described above has oil injection holes. Multiple oil injection holes are arranged sequentially along the circumferential and axial directions. Each oil injection hole includes a first oil injection hole 214a, a second oil injection hole 214b, and a third oil injection hole 214c.

[0146] Multiple first oil injection holes 214a are arranged sequentially and at intervals along the circumference. Each first oil injection hole 214a corresponds to a first slot 251. The first oil injection hole 214a can spray the oil in the oil passage 213 into the first slot 251.

[0147] Multiple second oil injection holes 214b are arranged sequentially at intervals along the circumference. Each second oil injection hole 214b is set corresponding to a second slot 252. The second oil injection hole 214b can spray the oil in the oil passage 213 into the second slot 252 in a targeted manner.

[0148] Multiple third oil injection holes 214c are arranged circumferentially at intervals. In the axial direction, each third oil injection hole 214c is located between each first oil injection hole 214a and each second oil injection hole 214b. The third oil injection holes 214c can selectively spray the oil in the oil passage 213 into the outer annular cavity 215.

[0149] like Figure 16As shown, the diameters of the first injection hole 214a and the second injection hole 214b are equivalent. That is, the diameters of the first injection hole 214a and the second injection hole 214b can be exactly the same, or the difference between their diameters can be kept within a preset range. In this way, it can be ensured that the amount and speed of the oil sprayed into the first tank 251 and the second tank 252 are approximately the same.

[0150] And / or, at least the uppermost third fuel injection hole 214c has a larger diameter than the first fuel injection hole 214a. And / or, at least the uppermost third fuel injection hole 214c has a larger diameter than the second fuel injection hole 214b. And / or, the uppermost third fuel injection hole 214c has a larger diameter than the lowermost third fuel injection hole 214c.

[0151] It is understandable that in the upper section of the outer annular cavity 215, the higher the section, the more easily and abundantly the oil can enter the first slot 251 and the second slot 252 located directly below it under the influence of gravity. Conversely, in the lower section of the upper annular cavity 215, the oil is more likely to flow downwards along the remaining sections of the outer annular cavity 215, and is less likely to enter the first slot 251 and the second slot 252 located to its side.

[0152] At this time, in order to ensure that the remaining oil in the outer ring cavity 215 can flow along the outer ring cavity 215 and enter the first slot 251 and the second slot 252 located below it in sequence, the diameter of the upper third oil injection hole 214c should be set as large as possible so that more oil can enter the outer ring cavity 215.

[0153] And / or, the first injection port 214a and the second injection port 214b, corresponding to the same tank compartment, are staggered circumferentially. For example, the first injection port 214a, corresponding to the same tank compartment, can be located adjacent to the upstream tank section 251a of the first tank compartment 251. Simultaneously, the second injection port 214b, corresponding to the same tank compartment, can be located adjacent to the downstream tank section 251b of the second tank compartment 252. This facilitates meeting the flow requirements of oil within each tank compartment.

[0154] The first injection port 214a can be aligned with the upstream slot segment 251a or the downstream slot segment 251b of the first slot 251. Similarly, the second injection port 214b can be aligned with the upstream slot segment 251a or the downstream slot segment 251b of the second slot 252. Alternatively, the radial orthogonal projection of the first injection port 214a falls on the stator winding 260 at its location and is disposed adjacent to the first slot 251. And / or, the radial orthogonal projection of the second injection port 214b falls on the stator winding 260 at its location and is disposed adjacent to the second slot 252.

[0155] That is, the first oil injection hole 214a is not directly aligned with the upstream slot segment 251a or downstream slot segment 251b of the first slot 251. Instead, it is aligned with the stator winding 260 adjacent to the upstream slot segment 251a or downstream slot segment 251b of the first slot 251. In this way, the oil sprayed from the first oil injection hole 214a will also cool the radial outer edge of the stator winding 260 and flow into the adjacent upstream slot segment 251a or downstream slot segment 251b near the first slot 251. The oil flowing in this direction is more likely to flow over the outer surface of the stator winding 260 and / or stator core 250, which helps to improve the cooling effect.

[0156] Similarly, the second oil injection hole 214b is not directly aligned with the upstream slot segment 251a or downstream slot segment 251b of the second slot 252. Instead, it is aligned with the stator winding 260 adjacent to the upstream slot segment 251a or downstream slot segment 251b of the second slot 252. In this way, the oil sprayed from the second oil injection hole 214b will also cool the radial outer edge of the stator winding 260 and flow into the adjacent upstream slot segment 251a or downstream slot segment 251b near the second slot 252. The oil flowing in this direction is more likely to flow over the outer surface of the stator winding 260 and / or stator core 250, which helps to improve the cooling effect.

[0157] As can be seen from the above embodiments, the disc flux motor is equipped with cooling structures for the front rotor assembly 331, the rear rotor assembly 332, and the stator assembly, respectively. All of these structures utilize oil cooling to effectively dissipate heat and lower the temperature of the front rotor assembly 331, the rear rotor assembly 332, and the stator assembly. The oil flowing through the cooling structures of the front rotor assembly 331, the rear rotor assembly 332, and the stator assembly all enters the same oil collecting chamber 410. Therefore, the axial orthogonal projections of the stator assembly 200 and the rotor assembly 300 are set to fall within the oil collecting chamber 410. This ensures that the oil can smoothly enter the oil collecting chamber 410 under the influence of gravity, facilitating convenient oil collection within the oil collecting chamber 410.

[0158] 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. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A disc-type flux motor, characterized in that, include: The housing is provided with an oil inlet and an oil outlet that communicate with the interior of the housing. The stator assembly is located within the aforementioned housing; A rotor assembly, disposed within the housing, includes a rotor shaft, two bearings, and two rotor assemblies. The two rotor assemblies are respectively disposed on opposite axial sides of the stator assembly, and the rotor shaft is mounted to the housing via the two bearings; and, An oil collection chamber is located at the bottom of the housing and has an oil collection cavity that communicates with the oil outlet. The oil collection cavity is used to communicate with the oil inlet through an external heat exchange component. The stator assembly has stator oil cavities extending circumferentially and radially, respectively. The rotor assembly and the housing are at least axially spaced to define a first rotor oil cavity. The stator oil cavity and the first rotor oil cavity are respectively connected to the oil inlet and the oil outlet, and the first rotor oil cavity and the oil inlet are connected at the bearing.

2. The disc-type flux motor as described in claim 1, characterized in that, The oil inlet is located on one axial side of the housing and is positioned near the top of the housing; and / or, The disc-type flux motor also includes a pump body, a cooler, and pipelines. The cooler forms a cooling chamber that communicates with the oil inlet. The pump body connects the oil collecting chamber and the cooling chamber through the pipelines to drive the oil in the oil collecting chamber into the cooling chamber through the pipelines.

3. The disc-type flux motor as described in claim 1, characterized in that, The housing is provided with two oil inlet channels corresponding to the two bearings, and each oil inlet channel includes: An oil drain section extends axially and is disposed directly opposite the bearing on the corresponding side; and, A connecting section connects the oil inlet and the corresponding oil outlet, and is adapted to extend the shape of the housing between the oil inlet and the corresponding oil outlet.

4. The disc-type flux motor as described in claim 3, characterized in that, The oil drain section is positioned directly opposite the ball bearing portion; and / or, The oil drain section is adapted to extend in a ring shape along the circumference of the bearing; and / or, The cross-sectional area of ​​the oil drain section is not greater than the cross-sectional area of ​​the connecting section.

5. The disc-type flux motor as described in claim 1, characterized in that, The rotor shaft includes: The main body includes a base plate and two annular side plates that bend and extend axially from the radial outer edge of the base plate. The base plate and the annular side plates together define a groove that communicates with the first rotor oil chamber; and... Two convex shafts protrude from the axial sides of the base plate, and two bearings are respectively positioned and installed at the two convex shafts.

6. The disc-type flux motor as described in claim 5, characterized in that, The rotor assembly includes: A back plate, arranged in a ring shape, has its radially inner edge bent and extended toward the stator assembly to form an inner ring protrusion, the inner ring protrusion being connected to the radially outer edge of the annular side plate, and the radially outer edge of the back plate bent and extended toward the stator assembly to form an outer ring protrusion; and, Multiple rotor cores are arranged radially on the side of the back plate facing the stator assembly and are radially constrained by the outer ring protrusion. The inner ring protrusion is beveled at the bend to form an inclined guide surface, which transitions between the groove and the first rotor oil chamber.

7. The disc-type flux motor as described in claim 1, characterized in that, The rotor assembly and the housing are radially spaced to form a second rotor oil chamber, the second rotor oil chamber being in communication with the first rotor oil chamber; and / or The rotor assembly and the stator assembly are axially spaced to form a third rotor oil chamber, which is in communication with the second rotor oil chamber.

8. The disc-type flux motor as described in any one of claims 1 to 7, characterized in that, The stator assembly includes: Multiple stator cores are arranged sequentially at intervals along the circumference, with slots formed between every two adjacent stator cores; and, Multiple stator windings are wound one-to-one around the periphery of each stator core. Each pair of adjacent stator windings abuts against each other circumferentially to divide the slot at the location into a first slot and a second slot located on both sides of its axial direction. The stator oil cavity includes an outer annular cavity formed on the radially outer side of the stator core, an inner annular cavity formed on the radially inner side of the stator core, a first slot, and a second slot. The outer annular cavity is connected to the oil inlet and the oil outlet, respectively. The first slot and the second slot are connected to the outer annular cavity and the inner annular cavity, respectively.

9. The disc-type flux motor as described in claim 8, characterized in that, The stator assembly also includes: Two plates are respectively disposed on both sides of the axial direction of each of the stator cores. The plates, every two adjacent stator cores, and the corresponding two stator windings together enclose and define either the first slot space or the second slot space; and, Multiple flow guides are protruding from the plate and are arranged one by one in each of the first slots and each of the second slots. The flow guides and the stator windings at their respective positions abut against each other along the axial direction to divide the corresponding first slot or second slot into two slot segments. Each slot segment is respectively connected to the outer ring cavity and the inner ring cavity.

10. The disc-type flux motor as described in claim 1, characterized in that, The oil collection tank and the housing are integrally formed, and at least the bottom chamber inside the housing constitutes the oil collection chamber; The axial orthogonal projections of the stator assembly and the rotor assembly fall within the oil collecting cavity.

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