A sealing mechanism for an axial flux motor

Abstract

This utility model relates to the field of motor technology, and more particularly to a sealing mechanism for an axial flux motor, comprising an outer stator, an inner stator, and a rotor. The rotor is disposed between the outer stator and the inner stator. A sealing system is provided between the outer stator and the inner stator, connecting the outer stator and the inner stator, and configured to seal the corresponding movement gap when the two stators move relative to each other after decoupling, thereby preventing external environmental media from entering the motor. This utility model provides a sealing mechanism for an axial flux motor that can achieve dynamic sealing between the two stators after decoupling, ensuring that foreign objects cannot enter the gap between the stator and the rotor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a sealing mechanism for an axial flux motor. Background Technology

[0002] Existing dual-stator single-rotor axial flux motors typically employ a fixed stator structure, with the air gap seal between the stator and rotor primarily designed for static conditions. However, in some novel motor topologies, a certain degree of relative motion is required between the outer and inner stators to achieve functional decoupling, torque distribution, or vibration suppression. Existing sealing structures struggle to adapt to such dynamic gap changes, allowing contaminants such as water and dust from the external environment to easily penetrate the motor through the stator gap during operation. This can cause winding short circuits, permanent magnet corrosion, or core wear, severely impacting the motor's reliability and lifespan. Especially in electric vehicles, rail transportation, or harsh operating conditions, motors must meet IP67 or higher protection ratings, while traditional O-rings or static seals cannot maintain effective sealing during continuous relative motion. Therefore, a sealing mechanism for axial flux motors that can achieve dynamic sealing after the two stators are decoupled is urgently needed. Utility Model Content

[0003] In view of the above-mentioned shortcomings of current axial flux motors, this utility model provides a sealing mechanism for axial flux motors. After the two stators are decoupled, the sealing mechanism can achieve dynamic sealing between the two stators, ensuring that foreign objects cannot enter the gap between the stator and the rotor.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] A sealing mechanism for an axial flux motor includes an outer stator, an inner stator, and a rotor. The rotor is disposed between the outer stator and the inner stator. A sealing system is provided between the outer stator and the inner stator. The sealing system connects the outer stator and the inner stator and is configured to seal the corresponding movement gap when the two stators move relative to each other after decoupling, so as to prevent external environmental media from entering the motor.

[0006] According to one aspect of the present invention, the sealing system includes an outer stator sealing frame, an inner stator sealing frame, and a sealing strip assembly. The outer stator sealing frame is connected to the outer shell of the outer stator, the inner stator sealing frame is connected to the outer shell of the inner stator, and the sealing strip assembly connects the outer stator sealing frame and the inner stator sealing frame.

[0007] According to one aspect of the present invention, the sealing strip assembly includes an intermediate skeleton, a sealing strip, and an elastic element. The sealing strip connects the inner stator sealing skeleton and the outer stator sealing skeleton and wraps around the intermediate skeleton. A cavity is formed inside the sealing strip, and the elastic element is disposed in the cavity. The elastic element is configured to apply elastic pressure to the sealing strip, so that the sealing strip is pressed against the mating surface of the inner stator sealing skeleton and / or the outer stator sealing skeleton.

[0008] According to one aspect of this utility model, the sealing strip is made of vulcanized nitrile rubber material.

[0009] According to one aspect of this utility model, the elastic element is a stainless steel spring.

[0010] According to one aspect of this utility model, the outer stator sealing frame, the inner stator sealing frame, and / or the intermediate frame are stainless steel stamping parts.

[0011] According to one aspect of the present invention, the sealing strip assembly is connected to the outer stator sealing frame and the inner stator sealing frame by an interference fit.

[0012] According to one aspect of this utility model, the inner stator sealing frame and the outer shell of the inner stator are connected by an interference fit.

[0013] According to one aspect of the present invention, the outer stator sealing frame and the outer shell of the outer stator are connected by an interference fit.

[0014] According to one aspect of the present invention, the rotor is mounted on a rotating shaft and rotates synchronously with the rotating shaft, and the outer stator and the inner stator are connected to the rotating shaft via bearings.

[0015] The advantages of this invention are as follows: The sealing system dynamically seals the gap between two relatively moving stators, preventing water, dust, and other foreign matter from entering the motor and causing winding short circuits, permanent magnet corrosion, or core wear. This effectively extends the motor's lifespan. The sealing system also enables the motor to achieve an IP67 waterproof rating, meeting the required protection level. The sealing strip wrapping around the intermediate frame reduces the risk of deformation leading to seal failure. The elastic element ensures the sealing strip is firmly pressed against the surfaces of the inner and / or outer stator sealing frames, guaranteeing its sealing performance. The use of nitrile rubber for the sealing strip effectively extends its lifespan, reducing motor maintenance frequency and thus lowering costs. The interference fit between the sealing strip assembly and the outer and inner stator sealing frames ensures a consistent seal. This invention provides a sealing mechanism for an axial flux motor. After the two stators are decoupled, the sealing mechanism can achieve dynamic sealing between the two stators, ensuring that foreign objects cannot enter the gap between the stator and the rotor, enabling the axial flux motor to meet the IP67 waterproof standard and improving the service life of the axial flux motor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments 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 these drawings without creative effort.

[0017] Figure 1 This is an exploded view of a sealing mechanism for an axial flux motor according to the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of a sealing mechanism for an axial flux motor according to the present invention.

[0019] Figure 3 This is a cross-sectional schematic diagram of a sealing mechanism for an axial flux motor according to the present invention.

[0020] Figure 4 This is a partially enlarged schematic diagram of a sealing mechanism for an axial flux motor according to the present invention.

[0021] The names corresponding to the serial numbers in the diagram are as follows:

[0022] 1. Outer stator; 11. Housing; 2. Rotor; 3. Shaft; 4. Inner stator; 5. Sealing system; 51. Outer stator sealing frame; 52. Inner stator sealing frame; 53. Sealing strip assembly; 531. Elastic element; 532. Sealing strip; 5321. Cavity; 533. Intermediate frame. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0026] Example 1

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a sealing mechanism for an axial flux motor includes an outer stator 1, an inner stator 4, and a rotor 2. The rotor 2 is disposed between the outer stator 1 and the inner stator 4, and is mounted on a rotating shaft 3 and rotates synchronously with the shaft 3. The outer stator 1 and the inner stator 4 are connected to the rotating shaft 3 via bearings. The specific structures of the inner stator, outer stator, and rotor can be configured by those skilled in the art based on existing technology and will not be elaborated here. A sealing system 5 is provided between the outer stator 1 and the inner stator 4. The sealing system 5 connects the outer stator 1 and the inner stator 4 and is configured to seal the corresponding movement gap when the two stators decouple and generate relative motion, thereby preventing external environmental media from entering the motor. Through the installation of the sealing system 5, water, dust, and other foreign objects can be effectively prevented from entering the gap between the two rotors during relative motion, thus enabling the axial flux motor to achieve an IP67 waterproof rating.

[0028] In this embodiment, the sealing system 5 includes an outer stator sealing frame 51, an inner stator sealing frame 52, and a sealing strip assembly 53. The outer stator sealing frame 51 is connected to the outer shell of the outer stator 1, the inner stator sealing frame 52 is connected to the outer shell of the inner stator 4, and the sealing strip assembly 53 connects the outer stator sealing frame 51 and the inner stator sealing frame 52.

[0029] In this embodiment, the inner stator sealing frame 52 is connected to the outer shell of the inner stator 4 by an interference fit. The inner stator sealing frame 52 is installed on the outer shell of the outer stator 1 by press fitting, forming an integral structure with the inner stator shell. The inner stator sealing frame 52 can be made of stainless steel by stamping, preferably 1.5mm thick stainless steel, and the outer shell of the inner stator 4 is made of 6061 aluminum alloy.

[0030] In this embodiment, the outer stator sealing frame 51 is connected to the outer shell of the outer stator 1 by an interference fit. The outer stator sealing frame 51 is installed on the outer shell of the outer stator 1 by press fitting, forming an integral structure with the outer shell of the outer stator 1. The outer stator sealing frame 51 can be made of stainless steel by stamping, preferably 1.5mm thick stainless steel, and the outer shell of the outer stator 1 is made of 6061 aluminum alloy.

[0031] In this embodiment, the sealing strip assembly 53 includes an intermediate skeleton 533, a sealing strip 532, and an elastic element 531. The sealing strip 532 connects the inner stator sealing skeleton 52 and the outer stator sealing skeleton 51, and wraps around the intermediate skeleton 533. A cavity 5321 is formed inside the sealing strip 532, and the elastic element 531 is disposed within the cavity 5321. The elastic element 531 is configured to apply elastic pressure to the arms of the sealing strip 532, causing the sealing strip 532 to press tightly against the mating surfaces of the inner stator sealing skeleton 52 and / or the outer stator sealing skeleton 51, i.e., both ends of the sealing strip 532 are connected to the inner stator sealing skeleton 52 and the outer stator sealing skeleton 51, respectively. The intermediate skeleton 533 effectively prevents the sealing strip 532 from deforming, ensuring that the sealing strip can tightly adhere to the inner stator sealing skeleton 52 and / or the outer stator sealing skeleton 51.

[0032] In this embodiment, the sealing strip 532 is made of vulcanized NBR (nitrile butadiene rubber). NBR has excellent wear resistance, corrosion resistance, and high temperature resistance, while also possessing a certain degree of elasticity, effectively blocking the medium and maintaining stable performance.

[0033] In this embodiment, the elastic element 531 is a stainless steel spring. The elastic element 531 allows the sealing strip to be pressed tightly against the surface of the inner stator sealing frame 52 and / or the outer stator sealing frame 51, ensuring the sealing performance of the sealing strip.

[0034] The beneficial effects of this embodiment are as follows: The sealing system dynamically seals the gap between the two relatively moving stators, preventing water, dust, and other foreign objects from entering the motor and causing winding short circuits, permanent magnet corrosion, or core wear, thus effectively improving the motor's service life. The sealing system also enables the motor to achieve an IP67 waterproof rating, meeting the motor's protection standards. Wrapping the intermediate frame with a sealing strip reduces the risk of seal failure due to strip deformation. The elastic element ensures the sealing strip is firmly pressed against the surface of the inner and / or outer stator sealing frames, guaranteeing its sealing performance. Using nitrile rubber for the sealing strip effectively extends its service life, reducing motor maintenance frequency and ultimately lowering costs.

[0035] Example 2

[0036] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a sealing mechanism for an axial flux motor includes an outer stator 1, an inner stator 4, and a rotor 2. The rotor 2 is positioned between the outer stator 1 and the inner stator 4, with the outer stator 1 and inner stator 4 respectively located on both sides of the rotor 2. The rotor 2 is mounted on a rotating shaft 3 and rotates synchronously with the shaft 3. The outer stator 1 and inner stator 4 are connected to the rotating shaft 3 via bearings. The specific structures of the inner stator, outer stator, and rotor can be configured by those skilled in the art based on existing technology and will not be elaborated here. A sealing system 5 is provided between the outer stator 1 and the inner stator 4. The sealing system 5 connects the outer stator 1 and the inner stator 4 and is configured to seal the corresponding movement gap when the two stators decouple and generate relative motion, thereby preventing external environmental media from entering the motor. The sealing system 5 effectively prevents water, dust, and other foreign objects from entering the gap between the two rotors during relative motion, thus enabling the axial flux motor to achieve an IP67 waterproof rating.

[0037] In this embodiment, the sealing system 5 includes an outer stator sealing frame 51, an inner stator sealing frame 52, and a sealing strip assembly 53. The outer stator sealing frame 51 is connected to the outer shell of the outer stator 1, the inner stator sealing frame 52 is connected to the outer shell of the inner stator 4, and the sealing strip assembly 53 connects the outer stator sealing frame 51 and the inner stator sealing frame 52.

[0038] In this embodiment, the inner stator sealing frame 52 is connected to the outer shell of the inner stator 4 by an interference fit. The inner stator sealing frame 52 is installed on the outer shell of the outer stator 1 by press fitting, forming an integral structure with the inner stator shell. The inner stator sealing frame 52 can be made of stainless steel by stamping, preferably 1.5mm thick stainless steel, and the outer shell of the inner stator 4 is made of 6061 aluminum alloy.

[0039] In this embodiment, the outer stator sealing frame 51 is connected to the outer shell of the outer stator 1 by an interference fit. The outer stator sealing frame 51 is installed on the outer shell of the outer stator 1 by press fitting, forming an integral structure with the outer shell of the outer stator 1. The outer stator sealing frame 51 can be made of stainless steel by stamping, preferably 1.5mm thick stainless steel, and the outer shell of the outer stator 1 is made of 6061 aluminum alloy.

[0040] In this embodiment, the sealing strip assembly 53 includes an intermediate skeleton 533, a sealing strip 532, and an elastic element 531. The sealing strip 532 connects the inner stator sealing skeleton 52 and the outer stator sealing skeleton 51, and wraps around the intermediate skeleton 533. A cavity 5321 is formed inside the sealing strip 532, and the elastic element 531 is disposed within the cavity 5321. The elastic element 531 is configured to apply elastic pressure to the upper and lower arms of the sealing strip 532, causing the sealing strip 532 to press tightly against the mating surfaces of the inner stator sealing skeleton 52 and / or the outer stator sealing skeleton 51, i.e., both ends of the sealing strip 532 are connected to the inner stator sealing skeleton 52 and the outer stator sealing skeleton 51, respectively. The intermediate skeleton 533 effectively prevents the sealing strip 532 from deforming, ensuring that the sealing strip can tightly adhere to the inner stator sealing skeleton 52 and / or the outer stator sealing skeleton 51.

[0041] In this embodiment, the sealing strip 532 is made of vulcanized NBR (nitrile butadiene rubber). NBR has excellent oil resistance, good wear resistance and aging resistance, while also possessing a certain degree of elasticity, effectively blocking the medium and maintaining stable performance.

[0042] In this embodiment, the elastic element 531 is a stainless steel spring. The elastic element 531 allows the sealing strip to be pressed tightly against the surface of the inner stator sealing frame 52 and / or the outer stator sealing frame 51, ensuring the sealing performance of the sealing strip.

[0043] In this embodiment, the outer stator sealing frame 51, the inner stator sealing frame 52, and / or the intermediate frame 533 are stainless steel stamping parts. Using stainless steel stamping for the frames makes them easy to manufacture, improves production efficiency, and helps reduce production costs.

[0044] In this embodiment, the sealing strip assembly 53 is connected to the outer stator sealing frame 51 and the inner stator sealing frame 52 via an interference fit. This interference fit ensures the sealing performance between the sealing strip assembly and the outer stator sealing frame 51 and the inner stator sealing frame 52.

[0045] In other embodiments, the sealing system 5 is not limited, as long as it can achieve dynamic sealing after the two stators are decoupled. For example, a frame is provided and sealed to the two stators respectively through sealing strips.

[0046] The working principle or operation process in this implementation is as follows:

[0047] When the outer shell of the outer stator 1 and the outer shell of the inner stator 4 rotate relative to each other, the sealing system 5 is pressed tightly against the outer stator sealing frame 51 by the elastic element 531. At this time, the sealing strip moves together with the outer shell of the outer stator 1, and the sealing strip 532 moves relative to the inner stator sealing frame 52 through friction. At the same time, the intermediate frame 533 ensures that the sealing strip 532 does not deform, allowing the sealing strip 532 to fit tightly against the inner stator sealing frame 52. In this way, the sealing strip can always maintain a sealing effect during the entire relative rotation of the outer shell of the outer stator 1 and the inner stator 4.

[0048] The beneficial effect of this embodiment is that by connecting the sealing strip assembly with the outer stator sealing frame and the inner stator sealing frame through an interference fit, the sealing performance of the sealing assembly with the outer stator sealing frame and the inner stator sealing frame can be ensured.

[0049] The advantages of this invention are as follows: The sealing system dynamically seals the gap between two relatively moving stators, preventing water, dust, and other foreign matter from entering the motor and causing winding short circuits, permanent magnet corrosion, or core wear. This effectively extends the motor's lifespan. The sealing system also enables the motor to achieve an IP67 waterproof rating, meeting the required protection level. The sealing strip wrapping around the intermediate frame reduces the risk of deformation leading to seal failure. The elastic element ensures the sealing strip is firmly pressed against the surfaces of the inner and / or outer stator sealing frames, guaranteeing its sealing performance. The use of nitrile rubber for the sealing strip effectively extends its lifespan, reducing motor maintenance frequency and thus lowering costs. The interference fit between the sealing strip assembly and the outer and inner stator sealing frames ensures a consistent seal. This invention provides a sealing mechanism for an axial flux motor. After the two stators are decoupled, the sealing mechanism can achieve dynamic sealing between the two stators, ensuring that foreign objects cannot enter the gap between the stator and the rotor, enabling the axial flux motor to meet the IP67 waterproof standard and improving the service life of the axial flux motor.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A sealing mechanism for an axial flux motor, comprising an outer stator (1), an inner stator (4), and a rotor (2), wherein the rotor (2) is disposed between the outer stator (1) and the inner stator (4), characterized in that, A sealing system (5) is provided between the outer stator (1) and the inner stator (4). The sealing system (5) connects the outer stator (1) and the inner stator (4) and is configured to seal the corresponding movement gap when the two stators generate relative motion after decoupling, so as to prevent external environmental media from entering the motor.

2. The sealing mechanism for an axial flux motor according to claim 1, characterized in that, The sealing system (5) includes an outer stator sealing frame (51), an inner stator sealing frame (52), and a sealing strip assembly (53). The outer stator sealing frame (51) is connected to the outer shell of the outer stator (1), the inner stator sealing frame (52) is connected to the outer shell of the inner stator (4), and the sealing strip assembly (53) connects the outer stator sealing frame (51) and the inner stator sealing frame (52).

3. The sealing mechanism for an axial flux motor according to claim 2, characterized in that, The sealing strip assembly (53) includes an intermediate skeleton (533), a sealing strip (532), and an elastic element (531). The sealing strip (532) connects the inner stator sealing skeleton (52) and the outer stator sealing skeleton (51) and wraps around the intermediate skeleton (533). A cavity (5321) is formed inside the sealing strip (532). The elastic element (531) is disposed in the cavity (5321). The elastic element (531) is configured to apply elastic pressure to the sealing strip (532) so that the sealing strip (532) is pressed against the mating surface of the inner stator sealing skeleton (52) and / or the outer stator sealing skeleton (51).

4. The sealing mechanism for an axial flux motor according to claim 3, characterized in that, The sealing strip (532) is made of vulcanized nitrile rubber.

5. The sealing mechanism for an axial flux motor according to claim 3, characterized in that, The elastic element (531) is a stainless steel spring.

6. The sealing mechanism for an axial flux motor according to claim 3, characterized in that, The outer stator sealing frame (51), the inner stator sealing frame (52), and / or the intermediate frame (533) are stainless steel stamping parts.

7. The sealing mechanism for an axial flux motor according to claim 2, characterized in that, The sealing strip assembly (53) is connected to the outer stator sealing skeleton (51) and the inner stator sealing skeleton (52) by an interference fit.

8. The sealing mechanism for an axial flux motor according to claim 2, characterized in that, The inner stator sealing frame (52) is connected to the outer shell of the inner stator (4) by an interference fit.

9. The sealing mechanism for an axial flux motor according to claim 2, characterized in that, The outer stator sealing frame (51) is connected to the outer stator (1) housing by an interference fit.

10. The sealing mechanism for an axial flux motor according to claim 3, characterized in that, The rotor (2) is mounted on the rotating shaft (3) and rotates synchronously with the rotating shaft (3). The outer stator (1) and the inner stator (4) are connected to the rotating shaft (3) through bearings.

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