Single rotor double stator disc motor

Abstract

The utility model discloses a single rotor double stator disc type motor includes casing, rotor assembly and two stator assemblies, and the casing forms the installation cavity, and the rotor assembly rotates and installs in the installation cavity, and two stator assemblies are located respectively in the axial both sides of rotor assembly, and the stator assembly and rotor assembly between limit the oil storage chamber, the lateral wall of casing is equipped with the oil inlet hole that links to the oil storage chamber, and after injecting the oil of preset amount, the oil inlet hole covers and closes, to enclose the oil and store in the oil storage chamber, the lateral wall of rotor assembly to the oil storage chamber is provided with the convex rib, and the convex rib is driven to rotate by rotor assembly, to agitate the oil in the oil storage chamber. The utility model forms the relatively closed oil storage chamber. Rotor assembly rotates and drives the convex rib to agitate the oil in the oil storage chamber, help to turn up the oil to the axial side surface of rotor assembly more evenly, and accelerate the heat dissipation speed of oil in the process of agitation, thereby improve the heat exchange effect of oil to rotor assembly and stator assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of single-rotor double-stator disc motors, specifically to a single-rotor double-stator disc motor. Background Technology

[0002] An axial flux motor is a type of motor in which the magnetic flux path is distributed along the axial direction. Its stator and rotor are typically disc-shaped, and the air gap magnetic field is parallel to the motor axis, hence it is also called a disc motor or flat motor. Its working principle is based on the law of electromagnetic induction; the axial magnetic field generated by the stator windings interacts with the rotor's permanent magnets, driving the rotor to rotate and output torque. Axial flux motors are generally classified according to the number of stators and rotors: single-rotor single-stator motors, single-rotor double-stator motors, and single-stator double-rotor motors. For example, single-rotor double-stator motors, due to their increasing demand for continuous power output, also have increasingly higher cooling requirements. Utility Model Content

[0003] The main objective of this invention is to propose a single-rotor dual-stator disc motor, aiming to provide a cooling structure solution suitable for single-rotor dual-stator motors with better cooling effect.

[0004] To achieve the above objectives, this utility model proposes a single-rotor, double-stator disc motor, comprising:

[0005] The housing has a mounting cavity.

[0006] The rotor assembly is rotatably mounted within the mounting cavity; and,

[0007] Two stator assemblies are disposed within the mounting cavity and are located on opposite axial sides of the rotor assembly, with an oil reservoir defined between the stator assembly and the rotor assembly;

[0008] The side wall of the shell is provided with an oil inlet hole that communicates with the oil storage chamber. After a preset amount of oil is injected, the oil inlet hole is closed to seal and store the oil in the oil storage chamber.

[0009] The rotor assembly has protruding ribs on the side wall facing the oil storage chamber. The ribs are driven to rotate by the rotor assembly to agitate the oil in the oil storage chamber.

[0010] Optionally, the rotor assembly includes a cage and a plurality of magnets, the cage comprising:

[0011] The inner ring component is rotatably mounted on the housing.

[0012] Multiple support arms, each with its radially inner end fixed to the radially outer wall of the inner ring member, the support arms arranged radially along the circumference of the inner ring member, a mounting groove defined between the inner ring member and every two adjacent support arms, the mounting groove for inserting and mounting the magnet; and,

[0013] The outer ring is fitted onto the radial outer end of each of the arms and limits and fixes each of the magnets in its respective mounting groove.

[0014] The rib is provided on the side wall of at least one of the support arms.

[0015] Optionally, the support arm and the inner ring are integrally formed; and / or,

[0016] The rib and the support arm are integrally formed; and / or

[0017] Each of the protruding ribs has one or at least two corresponding to each of the support arms.

[0018] Optionally, the rib extends elongatedly in the radial and / or circumferential directions; and / or,

[0019] The outer surface of the rib is provided in a convex arc shape; and / or

[0020] The axial width of the oil storage chamber is D1, and the protrusion height of the rib is D2, where D2 is not less than one-sixth of D1 and not greater than one-third of D1.

[0021] Optionally, the housing includes a front housing and a rear housing that are axially joined to each other, and both the front housing and the rear housing include an end housing located axially in the rotor assembly and a side housing located radially in the rotor assembly;

[0022] The side shell and the rotor assembly are spaced apart to define an annular cavity at the interval, and the annular cavity communicates with the oil reservoir.

[0023] Optionally, the side shell has protrusions on the sidewall facing the annular cavity, and a plurality of protrusions are arranged at intervals along the circumference of the shell;

[0024] The outer surface of the protrusion is shaped like a convex arc.

[0025] Optionally, the two oil storage chambers are connected by an axial channel.

[0026] Optionally, the axial projections of the convex ribs disposed in the two oil storage chambers overlap.

[0027] Optionally, the rotor assembly includes a cage and a plurality of magnets, the cage comprising:

[0028] The inner ring component is rotatably mounted on the housing.

[0029] Multiple support arms, each with its radially inner end fixed to the radially outer wall of the inner ring member, the support arms arranged radially along the circumference of the inner ring member, a mounting groove defined between the inner ring member and every two adjacent support arms, the mounting groove for inserting and mounting the magnet; and,

[0030] The outer ring is fitted onto the radial outer end of each of the arms and limits and fixes each of the magnets in its respective mounting groove.

[0031] The height of the oil injected into the oil storage chamber is H1, and the height of the magnet at the bottom is H2. H1 is not less than 70% of H2 and not greater than 80% of H2.

[0032] Optionally, the housing further defines a heat exchange chamber on the axial outer side of the oil storage chamber, the heat exchange chamber being used to inject liquid or gas, and to exchange heat with the oil in the oil storage chamber through the liquid or gas.

[0033] In the technical solution provided by this utility model, when the oil inlet is opened, a preset amount of oil can be injected into the oil storage chamber through the oil inlet. Then the oil inlet is closed, forming a relatively closed oil storage chamber. During the rotation of the rotor assembly, the oil will repeatedly flow across the entire axial side surface of the rotor assembly, thereby cooling the rotor assembly and stator assembly. The raised ribs, protruding from the axial side surface of the rotor assembly, can be moved within the oil storage chamber by the rotor assembly. The movement of the raised ribs can agitate the oil within the oil storage chamber, thus helping to swell the oil and more evenly cover the axial side surface of the rotor assembly; and also helping to accelerate the heat dissipation rate of the oil during agitation, thereby improving the heat exchange effect of the oil on the rotor assembly and stator assembly. This application features a simple structure and excellent cooling effect on the rotor assembly and stator assembly. Attached Figure Description

[0034] 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.

[0035] Figure 1 A perspective view of the first embodiment of the single-rotor dual-stator disc motor provided by this utility model;

[0036] Figure 2 for Figure 1 An exploded view of the main structure of a single-rotor, double-stator disc motor.

[0037] Figure 3 for Figure 1 A cross-sectional schematic diagram of a single-rotor, double-stator disc motor;

[0038] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0039] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0040] Figure 6 for Figure 2 A three-dimensional schematic diagram of the central rotor assembly;

[0041] Figure 7 for Figure 6 Exploded view of the main structure of the rotor assembly;

[0042] Figure 8 for Figure 6 Front view of the central rotor assembly;

[0043] Figure 9 This is a perspective view of a second embodiment of the single-rotor double-stator disc motor provided by this utility model.

[0044] Explanation of icon numbers:

[0045] 100 Housing; 110 Mounting cavity; 111 Oil reservoir; 112 Annular channel; 120 Heat exchange cavity; 130 Front housing; 131 Front end housing; 132 Front side housing; 140 Rear housing; 141 Rear end housing; 142 Rear side housing; 150 Protrusion; 160 Oil inlet; 171 Heat exchange inlet; 172 Heat exchange outlet; 200 Rotor assembly; 210 Cage; 211 Inner ring; 212 Support arm; 213 Outer ring; 214 Mounting groove; 220 Magnet; 221 First magnet; 230 Bearing; 300 Stator assembly; 400 Rib; 500 Sealing component.

[0046] 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

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Please see Figures 1 to 9 The single-rotor double-stator disc motor provided by this utility model includes a housing 100, a rotor assembly 200, and two stator assemblies 300.

[0051] For ease of understanding, the following embodiments will use a single-rotor dual-stator disc motor and its internal components, such as rotor assembly 200 and stator assembly 300, each having corresponding axial, radial, and circumferential directions as examples. In practical applications, the radial direction of the single-rotor dual-stator disc motor generally extends along the direction of gravity, meaning the single-rotor dual-stator disc motor has an upper and lower side located in the direction of gravity. Furthermore, the axial direction of the single-rotor dual-stator disc motor generally has a front and a rear side. The front side of the single-rotor dual-stator disc motor generally faces the user.

[0052] Therefore, a mounting cavity 110 is formed inside the housing 100. Generally, to facilitate the assembly and disassembly of internal components such as the rotor assembly 200 and the stator assembly 300, 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, nor is the specific connection direction of each housing unit limited.

[0053] For example Figures 1 to 9As shown, the shell unit is specifically configured as two units, namely a front shell 130 and a rear shell 140. The front shell 130 and the rear shell 140 are respectively recessed on their adjacent sides to form grooves. After the front shell 130 and the rear shell 140 are assembled and secured along the axial direction, the two grooves together enclose and define the mounting cavity 110.

[0054] To define the recess, the front housing 130 may include a front end housing 131 located axially forward and a front side housing 132 that surrounds the radial outer edge of the front end housing 131 circumferentially. The front end housing 131 and the front side housing 132 together define the recess. Similarly, the rear housing 140 may include a rear end housing 141 located axially rearward and a rear side housing 142 that surrounds the radial outer edge of the rear end housing 141 circumferentially. The rear end housing 141 and the rear side housing 142 together define the recess. During assembly, the front side housing 132 and the rear side housing 142 are joined together to ensure that the two recesses together form a mounting cavity 110 of suitable size and shape.

[0055] The side wall of the housing 100 is provided with an oil inlet 160 communicating with the oil storage chamber 111. Specifically, the oil inlet 160 can be located at any position on the housing 100. However, generally, the oil inlet 160 can be located in the upper part of the housing 100. More specifically, the oil inlet 160 can be located at the front end housing 131, the front side housing 132, the rear end housing 141, or the rear side housing 142. For example... Figure 2 As shown, the front shell 132 and / or the rear shell 142 may have a boss protruding radially. An oil inlet 160 is formed at the boss.

[0056] When a single-rotor dual-stator disc motor also has a wiring structure protruding radially on the front housing 132 and / or the rear housing 142, the boss and the liquid inlet can be set near the wiring structure, which helps to make the overall structure compact.

[0057] The oil inlet 160 is configured to be openable and closable. That is, the oil inlet 160 has an open state and a closed state. For this purpose, the single-rotor dual-stator disc motor may also include a plug 500. The plug 500 is disengaged from the oil inlet 160, so that the oil inlet 160 can switch to the open state after being disengaged, and switch to the closed state after being plugged.

[0058] The rotor assembly 200 is rotatably mounted within the mounting cavity 110. Shaft holes are provided axially at corresponding locations (generally at the central axis) of the housing 100, such as the front end housing 131 and the rear end housing 141. The rotor assembly 200 includes a rotor shaft, two bearings 230, and a rotor assembly. The rotor shaft is rotatably mounted at the shaft holes about its own axis via the two bearings 230.

[0059] Two stator assemblies 300 are disposed within the mounting cavity 110. The two stator assemblies 300 are located on opposite sides of the rotor assembly 200 along the axial direction. The stator assemblies 300 and the aforementioned rotor assembly are generally disc-shaped and are arranged opposite each other along the axial direction. The mounting cavity 110 defines an oil reservoir 111 in the area between the stator assembly 300 and the rotor assembly 200.

[0060] In practical applications, after the sealing component 500 opens the oil inlet 160, a preset amount of external oil will be injected through the oil inlet 160. Then, the sealing component 500 is operated to close the oil inlet 160. This can basically ensure that the oil storage chamber 111 forms a closed chamber.

[0061] This preset amount is at least less than the total volume of the oil reservoir 111. This allows the oil to be stored in a localized space within the oil reservoir 111. This ensures that when the rotor assembly 200 rotates relative to the stator assembly 300, the oil can be driven to flow evenly within the oil reservoir 111.

[0062] Generally, when the rotor assembly 200 is not rotating, the oil in the oil reservoir 111 will accumulate at the bottom of the oil reservoir 111 under the influence of gravity. At this time, the oil will only cool the lower parts of the stator assembly 300 and / or the rotor assembly 200 (if cooling is required). However, when the rotor assembly 200 is driven to rotate, the oil accumulated in the oil reservoir 111 will be driven to rotate by the rotor assembly 200. The oil will at least repeatedly flow over the local axial side surface of the rotor assembly 200, thereby cooling the rotor assembly 200 and the stator assembly 300. Under the action of centrifugal force, the oil can spread to most or all of the space in the oil reservoir 111, thereby increasing the contact area with the stator assembly 300 and / or the rotor assembly 200 and improving the cooling effect.

[0063] Based on this, the rotor assembly 200 has a protruding rib 400 on its side wall facing the oil storage chamber 111. The protruding rib 400 is driven to rotate by the rotor assembly 200, which is equivalent to interfering with the oil in the moving state in the oil storage chamber 111. This interference can agitate the oil in the oil storage chamber 111.

[0064] The movement of the raised rib 400 can agitate the oil in the oil storage chamber 111, thereby helping to swell the oil and more evenly cover the axial side surface of the rotor assembly 200. Furthermore, it helps to accelerate the heat dissipation of the oil during agitation, thus improving the heat exchange effect of the oil on the rotor assembly 200 and stator assembly 300. This application features a simple structure and excellent cooling effect on the rotor assembly 200 and stator assembly 300.

[0065] The rib 400 can be disposed on the axial side surface of any component in the rotor assembly 200. For example, in one embodiment, the rotor assembly 200 includes a cage 210 and a plurality of magnets 220. The cage 210 includes an inner ring 211, a plurality of support arms 212, and an outer ring 213.

[0066] The inner ring member 211 is rotatably mounted on the housing 100. Specifically, the inner ring member 211 can be fixedly mounted on the radially outer side of the rotor shaft. The radially inner end of each arm 212 is fixed to the radially outer wall of the inner ring member 211. The arms 212 are arranged radially along the circumference of the inner ring member 211. A mounting groove 214 is defined between the inner ring member 211 and every two adjacent arms 212. The mounting groove 214 is for inserting and mounting magnets 220. The outer ring member 213 is sleeved on the radially outer end of each arm 212. The outer ring member 213 limits and fixes each magnet 220 within its respective mounting groove 214.

[0067] In practical applications, the inner ring 211 and each support arm 212 can be integrally formed. Alternatively, the inner ring 211 and each support arm 212 can be formed separately and then detachably or non-detachably connected.

[0068] The shape and size of the mounting slot 214 generally correspond to and match the shape and size of each magnet 220. Of course, to ensure a stable assembly, the size of the mounting slot 214 can also be slightly smaller than the size of the corresponding magnet 220 in some areas, so that the two are installed with an interference fit.

[0069] In practical applications, one of the circumferential sidewalls of the support arm (i.e., the sidewall of the mounting groove 214) and the circumferential sidewall of the magnet 220 can be provided with a groove, while the other can be provided with a sliding protrusion. The sliding protrusion and / or the groove extends radially in an elongated shape. During assembly, the magnet 220 is roughly positioned axially after the sliding protrusion and groove are aligned. Then, the magnet 220 is ensured to be properly assembled within the mounting groove 214 by sliding along the groove via the sliding protrusion. Furthermore, the magnet 220 can be circumferentially and axially limited by the convex-concave fit of the sliding protrusion and groove.

[0070] The outer ring 213 is generally formed independently of the support arm 212 and / or the inner ring 211. The outer ring 213 is made of, for example, a composite material containing carbon fiber. After each magnet 220 is assembled into its corresponding mounting slot 214, the outer ring 213 fits onto the radial outer edge of each support arm 212 and each magnet 220, and radially limits the movement of each magnet 220. This ensures that the magnets 220 are securely installed within the retainer 210.

[0071] Taking the stator assembly 300 as an example, the rib 400 can be provided at any suitable position in the stator assembly 300. For example, the rib 400 can be provided on the axial surface of the inner ring 211, the axial surface of the support arm 212, and / or the axial surface of the magnet 220.

[0072] However, in order to minimize the impact on the operating state of the stator assembly 300, in such cases... Figures 1 to 9 In the illustrated embodiment, the rib 400 protrudes from the side wall of at least one arm 212. That is, the rib 400 may protrude from a portion of the axial surface of the arm 212, or the rib 400 may protrude from the axial surface of all the arms 212.

[0073] When some of the support arms 212 have raised ribs 400 on their axial surfaces, the support arms 212 with and without raised ribs 400 can be arranged regularly along the circumference. For example, support arms 212 with and without raised ribs 400 can be arranged alternately, or support arms 212 with raised ribs 400 can be symmetrically arranged about the central axis. It can be understood that the raised ribs 400 are subjected to a reverse force from the oil while agitating it. By regularly arranging the support arms 212 with raised ribs 400, the reverse force on each raised rib 400 can be more balanced overall.

[0074] Of course, the support arm 212 with the protruding rib 400 may have only one protruding rib 400. Alternatively, the support arm 212 may have at least two protruding ribs 400. And the protruding ribs 400 may be distributed on the support arm 212. For example, they may be arranged sequentially along the radial direction and / or along the circumferential or tangential direction.

[0075] The rib 400 and the support arm 212 can be integrally formed. In this case, the structural strength of the rib 400 and the support arm 212 is relatively consistent, and their manufacturing materials are also basically the same. Alternatively, the rib 400 and the support arm 212 can be separately formed and then connected in a detachable or non-detachable manner. This will increase the disassembly and assembly operations of the rib 400 and the support arm 212, but it will allow for flexible adjustment of the rib 400 and the support arm 212 in terms of aspects such as manufacturing materials and installation orientation.

[0076] The shape and size of the rib 400 are not limited. The rib 400 may be columnar and protrude from the axial surface of the support arm 212. Alternatively, the rib 400 may extend elongatedly in the radial and / or circumferential directions. Specifically, when the rib 400 extends elongatedly in the radial and circumferential directions, it may be an inclined and straight rib structure. Or as... Figures 6 to 7 As shown, it can also be a rib structure that extends in an arc shape.

[0077] The outer surface of the rib 400 can be specifically designed as a convex arc surface. This makes the outer surface of the rib 400 relatively more rounded. It helps to avoid the formation of sharp protrusions on the outer surface of the rib 400, thereby ensuring smoother contact between the rib 400 and the oil, and making the force between the two more uniform.

[0078] The axial protrusion height of the rib 400 is not limited compared to, for example, the support arm 212. As long as there is a height difference between the rib 400 and the axial surface of the support arm 212, it can agitate the oil. However, it is understandable that if the protrusion height of the rib 400 is too large, on the one hand, it may cause excessive reverse force exerted by the oil on the rib 400 and the rotor assembly 200, affecting the operating performance of the rotor assembly 200. On the other hand, it may conversely reduce the fluidity of the oil in the oil reservoir 111, reducing the cooling effect of the oil on the stator assembly 300 and / or the rotor assembly 200.

[0079] Therefore, in practical applications, if the axial width of the oil storage chamber 111 is D1 and the protrusion height of the rib 400 is D2, then optionally, D2 can be set to be no less than one-sixth of D1 and no more than one-third of D1. Within this range, the rib 400 can both agitate the oil to increase its fluidity and minimize the interference of oil flow with the high-performance operation of the rotor assembly 200.

[0080] As described above, the oil reservoir 111 is formed at least between the stator assembly 300 and the rotor assembly 200. Further, when the housing 100 includes a front housing 130 and a rear housing 140 as described above, and the front housing 130 includes a front end housing 131 and a front side housing 132, and the rear housing 140 includes a rear end housing 141 and a rear side housing 142, a gap is formed between the front side housing 132 and / or the rear side housing 142 and the radial outer edge of the rotor assembly 200. This gap defines an annular cavity 112. The annular cavity 112 communicates with the oil reservoir 111. Thus, when the rotor assembly 200 rotates and the oil flows through the oil reservoir 111 under the action of the ribs 400, the oil can cool the axial surfaces of the stator assembly 300 and the rotor assembly 200. Then, when the oil is thrown into the annular cavity 112 by centrifugal force, it can cool the radial outer edge of the stator assembly 300, thereby improving the overall cooling of the stator assembly 300.

[0081] Furthermore, the front shell 132 and / or the rear shell 142 have protrusions 150 on their sidewalls facing the annular cavity 112. Multiple protrusions 150 are arranged circumferentially around the shell 100. The outer surface of each protrusion 150 is convex arc-shaped. A recess is naturally formed between every two adjacent protrusions 150. The alternating arrangement of the recesses and protrusions 150 is equivalent to forming a continuous undulating structure on the sidewalls of the front shell 132 and / or the rear shell 142 facing the annular cavity 112. In this way, within the limited structure of the front shell 132 and / or the rear shell 142, the contact area with the oil can be increased as much as possible, and the flow path and flow time of the oil within the annular cavity 112 can be extended, thereby further optimizing the cooling effect on the stator assembly 300.

[0082] Of course, depending on actual needs, the aforementioned oil reservoir 111 can be formed only between the rotor assembly 200 and the stator assembly 300 on one side. However, considering actual operating requirements and the overall structural and performance stability of the single-rotor dual-stator disc motor, an oil reservoir 111 is generally formed on each of the axial sides of the rotor assembly 200, thus forming two oil reservoirs 111.

[0083] At this time, the two oil storage chambers 111 can be independent of each other. That is, the oil in the two oil storage chambers 111 is not interconnected.

[0084] Alternatively, the two oil reservoirs 111 are connected by an axial channel. The axial channel may be an annular channel surrounding the outer periphery of the rotor assembly 200. Alternatively, the axial channel may be a straight channel extending axially. And at least two such axial channels may be sequentially spaced apart along the outer periphery of the rotor assembly 200.

[0085] When the annular cavity 112 is provided as described above, the axial channel and the annular cavity 112 are connected. This allows the oil in the two oil storage chambers 111, the two annular cavities 112, and the axial channel to be interconnected.

[0086] Furthermore, when two oil storage chambers 111 are provided as described above, each rib 400 disposed in the two oil storage chambers 111 can be independently configured. That is, the shape, quantity, and size of each rib 400 disposed in the two oil storage chambers 111 can be freely configured. Alternatively, to ensure structural consistency, the orthographic projections of each rib 400 disposed in the two oil storage chambers 111 can be aligned along the axial direction.

[0087] Based on one or more of the above embodiments, the method for determining the preset amount of oil injected through the oil inlet 160 is as follows: It can be understood that when the rotor assembly 200 includes a cage 210 and multiple magnets 220 as described above, and the cage 210 includes an inner ring 211, multiple support arms 212, and an outer ring 213, the support arms 212 and the magnets 220 are arranged radially with the central axis of the rotor assembly 200 as the center. In this case, each magnet 220 includes a first magnet 221221 located at the bottom of the entire assembly and generally extending vertically. If the height of the oil injected into the oil reservoir 111 is H1, and the height of the bottom magnet 220 is H2, then H1 can be specifically set to be not less than 70% and not greater than 80% of H2. This ensures that the amount of oil injected into the oil reservoir 111 is not excessive, but sufficient to meet the cooling requirements.

[0088] Of course, the lower-temperature oil heats up after cooling the stator assembly 300 and / or rotor assembly 200, forming a higher-temperature oil. To ensure continuous cooling of the stator assembly 300 and / or rotor assembly 200 by the oil, in a further embodiment, the housing 100 defines a heat exchange chamber 120 axially outside the oil storage chamber 111. The heat exchange chamber 120 is used to inject liquid or gas, and heat is exchanged between the liquid or gas and the oil in the oil storage chamber 111. The heat exchange chamber 120 is generally located at the front end housing 131 and / or the rear end housing 141. Here, the front end housing 131 and / or the rear end housing 141 are made of thermally conductive material, allowing heat to be conducted between the gas or liquid in the heat exchange chamber 120 and the oil in the oil storage chamber 111, achieving the purpose of heat exchange. That is, the higher-temperature oil can be cooled by the gas or liquid in the heat exchange chamber 120, and a lower-temperature oil can be obtained again.

[0089] At this point, the front shell 131 and / or the rear shell 141 can be constructed by stacking at least two plates to form the heat exchange cavity 120. The heat exchange cavity 120 generally has a heat exchange inlet 171 and a heat exchange outlet 172. The heat exchange inlet 171 allows gas or liquid to enter the heat exchange cavity 120. The heat exchange outlet 172 allows gas or liquid to exit the heat exchange cavity 120 and return to the heat exchange cavity 120 after flowing through an external device such as a cooler.

[0090] 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 single-rotor, double-stator disc motor, characterized in that, include: The housing has a mounting cavity. The rotor assembly is rotatably mounted within the mounting cavity; as well as, Two stator assemblies are disposed within the mounting cavity and are located on opposite axial sides of the rotor assembly, with an oil reservoir defined between the stator assembly and the rotor assembly; The side wall of the shell is provided with an oil inlet hole that communicates with the oil storage chamber. After a preset amount of oil is injected, the oil inlet hole is closed to seal and store the oil in the oil storage chamber. The rotor assembly has protruding ribs on the side wall facing the oil storage chamber. The ribs are driven to rotate by the rotor assembly to agitate the oil in the oil storage chamber.

2. The single-rotor, double-stator disc motor as described in claim 1, characterized in that, The rotor assembly includes a cage and a plurality of magnets, the cage comprising: The inner ring component is rotatably mounted on the housing. Multiple support arms, each with its radially inner end fixed to the radially outer wall of the inner ring member, the support arms arranged radially along the circumference of the inner ring member, a mounting groove defined between the inner ring member and every two adjacent support arms, the mounting groove for inserting and mounting the magnet; and, The outer ring is fitted onto the radial outer end of each of the arms and limits and fixes each of the magnets in its respective mounting groove. The rib is provided on the side wall of at least one of the support arms.

3. The single-rotor, double-stator disc motor as described in claim 2, characterized in that, The support arm and the inner ring are integrally formed; and / or, The rib and the support arm are integrally formed; and / or Each of the protruding ribs has one or at least two corresponding to each of the support arms.

4. The single-rotor, double-stator disc motor as described in claim 1, characterized in that, The rib extends elongatedly in the radial and / or circumferential directions; and / or, The outer surface of the rib is provided in a convex arc shape; and / or The axial width of the oil storage chamber is D1, and the protrusion height of the rib is D2, where D2 is not less than one-sixth of D1 and not greater than one-third of D1.

5. The single-rotor, double-stator disc motor as described in claim 1, characterized in that, The housing includes a front housing and a rear housing that are axially joined together, each of the front housing and the rear housing including an end housing located axially in the rotor assembly and a side housing located radially in the rotor assembly; The side shell and the rotor assembly are spaced apart to define an annular cavity at the interval, and the annular cavity communicates with the oil reservoir.

6. The single-rotor, double-stator disc motor as described in claim 5, characterized in that, The side shell has protrusions on the side wall facing the annular cavity, and multiple protrusions are arranged at intervals along the circumference of the shell. The outer surface of the protrusion is shaped like a convex arc.

7. The single-rotor double-stator disc motor as described in claim 1, characterized in that, The two oil storage chambers are connected by an axial channel.

8. The single-rotor double-stator disc motor as described in claim 1, characterized in that, The axial projections of the convex ribs located in the two oil storage chambers overlap.

9. The single-rotor, double-stator disc motor as described in claim 1, characterized in that, The rotor assembly includes a cage and a plurality of magnets, the cage comprising: The inner ring component is rotatably mounted on the housing. Multiple support arms, each with its radially inner end fixed to the radially outer wall of the inner ring member, the support arms arranged radially along the circumference of the inner ring member, a mounting groove defined between the inner ring member and every two adjacent support arms, the mounting groove for inserting and mounting the magnet; and, The outer ring is fitted onto the radial outer end of each of the arms and limits and fixes each of the magnets in its respective mounting groove. The height of the oil injected into the oil storage chamber is H1, and the height of the magnet at the bottom is H2. H1 is not less than 70% of H2 and not greater than 80% of H2.

10. The single-rotor, double-stator disc motor as described in claim 1, characterized in that, The housing also defines a heat exchange chamber on the axial outer side of the oil storage chamber, the heat exchange chamber being used to inject liquid or gas, and to exchange heat with the oil in the oil storage chamber through the liquid or gas.

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