Claims:1. A structure (10) for ingress protection sealing of a motor (20), wherein the structure (10) comprises:
at least one cover (40) adapted to prevent ingression of one or more first-type of particles inside of the motor (20) upon mounting the at least one cover (40) on at least one of a first side (50) of the motor (20) and a second side (60) of the motor (20),
wherein the at least one cover (40) comprises one or more grooves (70) on an inner surface of the at least one cover (40), wherein the one or more grooves (70) are adapted to receive at least one first-type of sealing arrangement (30) using a first predefined fastening mechanism,
wherein the at least one first-type of sealing arrangement (30) comprises a plurality of lip-structures (80), wherein the at least one first-type of sealing arrangement (30) is adapted to seal a labyrinth between a shaft (90) of the motor (20) and the at least one cover (40) via the plurality of lip-structures (80), thereby preventing the ingression of the one or more first-type of particles inside of the motor (20) via the labyrinth,
wherein the plurality of lip-structures (80) comprises at least one first-type of lip-structure (100) and at least four second-type of lip-structures (110),
wherein the at least one first-type of lip-structure (100) is projecting in a first predefined direction,
wherein each of the at least four second-type of lip-structures (110) is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures (110) and the at least one first-type of lip-structure (100).
2. The structure (10) as claimed in claim 1, wherein the one or more grooves (70) are adapted to receive and hold at least one second-type of sealing arrangement (120), wherein the at least one second-type of sealing arrangement (120) is adapted to:
seal the at least one cover (40) to a rim (130) of the motor (20) to prevent the ingression of the one or more first-type of particles inside of the motor (20) via the rim (130) of the motor (20); and
provide self-centering to the at least one cover (40) on the motor (20).
3. The structure (10) as claimed in claim 2, wherein the at least one second-type of sealing arrangement (120) comprises an O-ring (135) with a predefined cross-sectional shape, wherein the predefined cross-sectional shape comprises a circle, a square, a rectangle, and a triangle.
4. The structure (10) as claimed in claim 1, wherein the first predefined fastening mechanism comprises a press-fit fastening mechanism.
5. The structure (10) as claimed in claim 1, comprises an integrated-assembly-sealing arrangement (140) comprising flowable material (150) applied in one or more open spaces between at least one pair of entities of one or more integrated assemblies associated with the motor (20).
6. The structure (10) as claimed in claim 5, wherein the flowable material (150) comprises at least one of plastic, resin, rubber, and polymer.
7. The structure (10) as claimed in claim 5, wherein the integrated-assembly-sealing arrangement (140) comprises a locking assembly (180), wherein the locking assembly (180) is adapted to lock the flowable material (150) between the at least one pair of entities, thereby preventing displacement of the integrated-assembly-sealing arrangement (140).
8. The structure (10) as claimed in claim 1, comprises a third-type of sealing arrangement (200) mounted around the shaft (90) of the motor (20) and adjacent to the at least one cover (40), wherein the third-type of sealing arrangement (200) comprises:
wool-based material (190) attached to an inner surface of the third-type of sealing arrangement (200), wherein the wool-based material (190) is adapted to seal the third-type of sealing arrangement (200) to the shaft (90) of the motor (20) to prevent the ingression of one or more second-type of particles inside of the motor (20) via the shaft (90) of the motor (20); and
a lip element (220) at a periphery of the third-type of sealing arrangement (200), wherein the lip element (220) is adapted to provide self-centering to the third-type of sealing arrangement (200) on the motor (20),
wherein the third-type of sealing arrangement (200) is attached to the at least one cover (40) using a second predefined fastening mechanism.
9. The structure (10) as claimed in claim 8, wherein the wool-based material (190) is adapted to attach to a cap (210) of the motor (20) using a predefined attaching mechanism such as ethyl cyanoacrylate-based glue.
10. A motor (20) with a structure (10) for ingress protection sealing of the motor (20) comprising:
a stator (240) comprising at least one of one or more magnets and one or more electromagnets;
a rotor (250) comprising at least one of the one or more magnets and the one or more electromagnets,
wherein the rotor (250) is adapted to rotate about a shaft (90) of the motor (20) upon receiving electrical energy from a power source, based on an interaction of the electrical energy and magnetic field of the at least one of the one or more magnets and the one or more electromagnets; and
the structure (10) for the ingress protection sealing of the motor (20), wherein the structure (10) is mechanically coupled to at least one of the rotor (250) or the stator (240), wherein the structure (10) comprises:
at least one cover (40) adapted to prevent ingression of one or more first-type of particles inside of the motor (20) upon mounting the at least one cover (40) on at least one of a first side (50) of the motor (20) and a second side (60) of the motor (20),
wherein the at least one cover (40) comprises one or more grooves (70) on an inner surface of the at least one cover (40), wherein the one or more grooves (70) are adapted to receive at least one first-type of sealing arrangement (30) using a first predefined fastening mechanism,
wherein the at least one first-type of sealing arrangement (30) comprises a plurality of lip-structures (80), wherein the at least one first-type of sealing arrangement (30) is adapted to seal a labyrinth between the shaft (90) of the motor (20) and the at least one cover (40) via the plurality of lip-structures (80), thereby preventing the ingression of the one or more first-type of particles inside of the motor (20) via the labyrinth,
wherein the plurality of lip-structures (80) comprises at least one first-type of lip-structure (100) and at least four second-type of lip-structures (110),
wherein the at least one first-type of lip-structure (100) is projecting in a first predefined direction,
wherein each of the at least four second-type of lip-structures (110) is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures (110) and the at least one first-type of lip-structure (100).
11. A method (280) for ingress protection sealing of a motor comprising:
providing at least one cover adapted for preventing ingression of one or more first-type of particles inside of the motor upon mounting the at least one cover on at least one of a first side of the motor and a second side of the motor; (290)
providing one or more grooves on an inner surface of the at least one cover; (300)
receiving, by the one or more grooves (70), at least one first-type of sealing arrangement using a first predefined fastening mechanism; (310)
providing a plurality of lip-structures for the at least one first-type of sealing arrangement; (320)
sealing, by the at least one first-type of sealing arrangement (30), a labyrinth between a shaft of the motor and the at least one cover via the plurality of lip-structures, thereby preventing the ingression of the one or more first-type particles inside of the motor via the labyrinth; (330)
providing at least one first-type of lip-structure for the plurality of lip-structures, wherein the at least one first-type of lip-structure is projecting in a first predefined direction; and (340)
providing at least four second-type of lip-structures for the plurality of lip-structures, wherein each of the at least four second-type of lip-structures is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures and the at least one first-type of lip-structure (350).
Dated this 18th day of November 2021

Signature

Harish Naidu
Patent Agent (IN/PA-2896)
Agent for the Applicant
, Description:FIELD OF INVENTION
[0001] Embodiments of a present disclosure relate to sealing of motors, and more particularly to a structure for ingress protection sealing of a motor and a method thereof.
BACKGROUND
[0002] In recent years, electric vehicles have been increasingly popular, and the reason being the environmentally friendly nature of electric vehicles because of the usage of electric motors for providing the required driving torque. An electric motor works on the principle of magnetic effects of current. Different types of electric motors are induction motor, hub motor, traction motor, or the like. However, when the electric motor of the electric vehicle is exposed to contaminants such as water, moisture, dust, and the like, can cause damage to the corresponding electric motor. The damage may correspond to affecting a life span of the electric motor, overheating of the electric motor, causing poor conductance, arching between line voltage and ground, or the like. Thus, ingress protection sealing may be needed to prevent the entry of such contaminants into the electric motor.
[0003] There are multiple approaches implemented to design the ingress protection sealing which can seal the electric motor more efficiently. However, such multiple approaches are associated with multiple disadvantages. Some of the multiple approaches have a design for the ingress protection sealing which is specific to a specific motor type and cannot be used for every type of motor, thereby restricting the usage of such an approach to only the specific type of motor. Also, most of the multiple approaches are less efficient in terms of providing ingress protection for the electric motor.
[0004] Hence, there is a need for an improved structure for ingress protection sealing of a motor and a method thereof which addresses the aforementioned issues.
BRIEF DESCRIPTION
[0005] In accordance with one embodiment of the disclosure, a structure for ingress protection sealing of a motor is provided. The structure includes at least one cover. The at least one cover is adapted to prevent ingression of one or more first-type of particles inside of the motor upon mounting the at least one cover on at least one of a first side of the motor and a second side of the motor. The at least one cover includes one or more grooves on an inner surface of the at least one cover. The one or more grooves are adapted to receive at least one first-type of sealing arrangement using a first predefined fastening mechanism. The at least one first-type of sealing arrangement includes a plurality of lip-structures. The at least one first-type of sealing arrangement is adapted to seal a labyrinth between a shaft of the motor and the at least one cover via the plurality of lip-structures, thereby preventing the ingression of the one or more first-type of particles inside of the motor via the labyrinth. The plurality of lip-structures includes at least one first-type of lip-structure and at least four second-type of lip-structures. The at least one first-type of lip-structure is projecting in a first predefined direction. Each of the at least four second-type of lip-structures is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures and the at least one first-type of lip-structure.
[0006] In accordance with another embodiment, a motor with a structure for ingress protection sealing of the motor is provided. The motor includes a stator including at least one of one or more magnets and one or more electromagnets. The motor also includes a rotor including at least one of the one or more magnets and the one or more electromagnets. The rotor is adapted to rotate about a shaft of the motor upon receiving electrical energy from a power source, based on an interaction of the electrical energy and magnetic field of the at least one of the one or more magnets and the one or more electromagnets. Further, the motor also includes the structure for the ingress protection sealing of the motor. The structure is mechanically coupled to at least one of the rotor or the stator. The structure includes at least one cover. The at least one cover is adapted to prevent ingression of one or more first-type of particles inside of the motor upon mounting the at least one cover on at least one of a first side of the motor and a second side of the motor. The at least one cover includes one or more grooves on an inner surface of the at least one cover. The one or more grooves are adapted to receive at least one first-type of sealing arrangement using a first predefined fastening mechanism. The at least one first-type of sealing arrangement includes a plurality of lip-structures. The at least one first-type of sealing arrangement is adapted to seal a labyrinth between the shaft of the motor and the at least one cover via the plurality of lip-structures, thereby preventing the ingression of the one or more first-type of particles inside of the motor via the labyrinth. The plurality of lip-structures includes at least one first-type of lip-structure and at least four second-type of lip-structures. The at least one first-type of lip-structure is projecting in a first predefined direction. Each of the at least four second-type of lip-structures is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures and the at least one first-type of lip-structure.
[0007] In accordance with yet another embodiment, a method for ingress protection sealing of a motor is provided. The method includes providing at least one cover adapted for preventing ingression of one or more first-type of particles inside of the motor upon mounting the at least one cover on at least one of a first side of the motor and a second side of the motor. The method also includes providing one or more grooves on an inner surface of the at least one cover. Further, the method also includes receiving at least one first-type of sealing arrangement using a first predefined fastening mechanism. Furthermore, the method also includes providing a plurality of lip-structures for the at least one first-type of sealing arrangement. Furthermore, the method also includes sealing a labyrinth between a shaft of the motor and the at least one cover via the plurality of lip-structures, thereby preventing the ingression of the one or more first-type particles inside of the motor via the labyrinth. Furthermore, the method also includes providing at least one first-type of lip-structure for the plurality of lip-structures, wherein the at least one first-type of lip-structure is projecting in a first predefined direction. Furthermore, the method also includes providing at least four second-type of lip-structures for the plurality of lip-structures, wherein each of the at least four second-type of lip-structures is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures and the at least one first-type of lip-structure.
[0008] To further clarify the advantages and features of the present disclosure, a more particular description of the disclosure will follow by reference to specific embodiments thereof, which are illustrated in the appended figures. It is to be appreciated that these figures depict only typical embodiments of the disclosure and are therefore not to be considered limiting in scope. The disclosure will be described and explained with additional specificity and detail with the appended figures.
BRIEF DESCRIPTION OF THE DRAWINGS
The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:
[0009] FIG. 1 is a schematic representation of a sectional view of a structure for ingress protection sealing of a motor with a detailed view of at least one first-type of sealing arrangement of the structure in accordance with an embodiment of the present disclosure;
[0010] FIG. 2 is a schematic representation of an exemplary embodiment of the sectional view of the structure of FIG. 1 with a detailed view of at least one second-type of sealing arrangement of the structure in accordance with an embodiment of the present disclosure;
[0011] FIG. 3 is a schematic representation of an exemplary embodiment of the sectional view of the structure of FIG. 1 with a detailed view of an integrated-assembly-sealing arrangement of the structure in accordance with an embodiment of the present disclosure;
[0012] FIG. 4 is a schematic representation of an exemplary embodiment of the sectional view of the structure of FIG. 1 with a detailed view of a positioning of wool-based material of a third-type of sealing arrangement of the structure in accordance with an embodiment of the present disclosure;
[0013] FIG. 5 is a schematic representation of an exemplary embodiment of an isometric view of a third-type of sealing arrangement of the structure of FIG. 1 in accordance with an embodiment of the present disclosure;
[0014] FIG. 6 is a schematic representation of a motor with a structure for ingress protection sealing of the motor in accordance with an embodiment of the present disclosure; and
[0015] FIG. 7 is a flow chart representing steps involved in a method for ingress protection sealing of a motor in accordance with an embodiment of the present disclosure.
[0016] Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.
DETAILED DESCRIPTION
[0017] For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure.
[0018] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting.
[0020] In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.
[0021] Embodiments of the present disclosure relate to a structure for ingress protection sealing of a motor. As used herein, the term “motor” is defined as a device that produces rotational force. In one embodiment, the motor may be an electric motor, wherein an electric motor is an electro-mechanical machine that converts electrical energy into mechanical energy. Further, as used herein, the term “ingress protection” is defined as a rating used to rate the degree of protection or sealing effectiveness in electrical enclosures against the intrusion of objects, water, dust, accidental contact, or the like. Thus, the ingress protection sealing may be defined as a sealing designed to provide a proper ingress protection to one or more electrical enclosures such as the motor. The structure described hereafter in FIG. 1 is the structure for the ingress protection sealing of the motor.
[0022] FIG. 1 is a schematic representation of a sectional view of a structure (10) for ingress protection sealing of a motor (20) with a detailed view of at least one first-type of sealing arrangement (30) of the structure (10) in accordance with an embodiment of the present disclosure. In one exemplary embodiment, the motor (20) may include a brushed motor, a brushless motor, a Direct Current (DC) motor, an Alternating Current (AC) motor, and the like. In another exemplary embodiment, the motor (20) may include a hub motor, a mid-drive motor, or the like. In yet another embodiment, the motor (20) may be classified based on application such as an industrial motor, a traction motor, a drone motor, or the like. Also, in an embodiment, the motor (20) may be used for a two-wheeled application, a four-wheeled application, or the like. Usually, in most applications, the motor (20) remains exposed to one or more particles such as water, dust particles, solid particles, or the like. Also, ingression of such one or more particles inside of the motor (20), may affect the normal functioning of the motor (20). Thus, the ingress protection sealing of the motor (20) may be needed. Therefore, the structure (10) includes at least one cover (40). In one embodiment, the at least one cover (40) may be composed of one or more Aluminum-based alloys. The at least one cover (40) is adapted to prevent the ingression of one or more first-type of particles inside of the motor (20) upon mounting the at least one cover (40) on at least one of a first side (50) of the motor (20) and a second side (60) of the motor (20). In one embodiment, the one or more first-type of particles may include one or more smaller-sized solid particles, one or more smaller-sized dust particles, water, or the like. The at least one cover (40) includes one or more grooves (70) on an inner surface of the at least one cover (40). The one or more grooves (70) are adapted to receive the at least one first-type of sealing arrangement (30) using a first predefined fastening mechanism. In an embodiment, the one or more grooves (70) may possess a first predefined shape such as, but not limited to, circular, rectangular, square, or the like.
[0023] The at least one first-type of sealing arrangement (30) includes a plurality of lip-structures (80). The at least one first-type of sealing arrangement (30) is adapted to seal a labyrinth between the shaft (90) of the motor (20) and the at least one cover (40) via the plurality of lip-structures (80), thereby preventing the ingression of the one or more first-type of particles inside of the motor (20) via the labyrinth. In one embodiment, the first-type of sealing arrangement (30) may be designed to provide the ingress protection sealing between one or more rotating parts and one or more stationary parts. In one exemplary embodiment, the one or more rotating parts may include the at least one cover (40) and the one or more stationary parts may include the shaft (90) of the motor (20). As used herein, the term “labyrinth” refers to a maze-like structure. Thus, in an embodiment, when the first-type of sealing arrangement (30) with the plurality of lip-structures (80) may be used for sealing the labyrinth, the one or more first-type of particles may have to pass through the maze-like structure sealed with the at least one first-type of sealing arrangement (30), from an external environment to the inside of the motor (20). However, because of the presence of the at least one first-type of sealing arrangement (30), the ingression of the one or more first-type of particles inside of the motor (20) via the labyrinth may be prevented. Also, in an embodiment, the presence of the plurality of lip-structures (80) may ensure the ingress protection sealing in multiple stages by still allowing for smooth rotation with less friction. In one embodiment, the at least one first-type of sealing arrangement (30) may be referred to as a custom-designed rotary seal.
[0024] The plurality of lip-structures (80) includes at least one first-type of lip-structure (100) and at least four second-type of lip-structures (110). The at least one first-type of lip-structure (100) is projecting in a first predefined direction. Each of the at least four second-type of lip-structures (110) is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures (110) and the at least one first-type of lip-structure (100). In one exemplary embodiment, the plurality of lip-structures (80) may include a spring, wherein the spring may maintain a minimum contact between the shaft (90) of the motor (20) and the at least one cover (40) which may be needed for providing the ingress protection sealing. Also, in one embodiment, the projected-lip angle may correspond to a range from about 15 degrees to about 75 degrees with an axis of the shaft (90) of the motor (20).
[0025] In one exemplary embodiment, the at least one first-type of sealing arrangement (30) may include a first section adapted to contact an inner surface of the one or more grooves (70) when the at least one first-type of sealing arrangement (30) is positioned within the corresponding one or more grooves (70). Further, the at least one first-type of sealing arrangement (30) may also include a second section attached to the first section at a predefined location on the first section. In one embodiment, the second section may be attached to the first section by making a first predefined angle with each other. Moreover, in an embodiment, the second section may possess the plurality of lip-structures (80) mounted on the corresponding second section such that, the plurality of lip-structures (80) may touch the shaft (90) of the motor (20) when the at least one cover (40) is mounted on the motor (20). Furthermore, in one embodiment, the first predefined fastening mechanism may include a press-fit fastening mechanism. As used herein, the term “press-fit fastening mechanism” is defined as a fastening mechanism in which two tight-fitting mating parts are fastened that produces a joint that is held together by friction after the parts are pushed together.
[0026] FIG. 2 is a schematic representation of an exemplary embodiment of the sectional view of the structure (10) of FIG. 1 with a detailed view of at least one second-type of sealing arrangement (120) of the structure (10) in accordance with an embodiment of the present disclosure. Basically, in one embodiment, the one or more grooves (70) may be adapted to receive and hold the at least one second-type of sealing arrangement (120). The at least one second-type of sealing arrangement (120) may be adapted to seal the at least one cover (40) to a rim (130) of the motor (20) to prevent the ingression of the one or more first-type of particles inside of the motor (20) via the rim (130) of the motor (20). In one embodiment, the second-type of sealing arrangement (120) may be designed to provide the ingress protection sealing between one or more static parts which may not have a relative motion with each other. In one exemplary embodiment, the one or more static parts may include the at least one cover (40) and the rim (130) of the motor (20). Basically, here, the at least one cover (40) and the rim (130) of the motor (20) may rotate tighter, and there may not be the relative motion between them. As used herein, the term “rim” is defined as the upper or outer edge of an object, especially when curved or circular. In one embodiment, the rim (130) may have a diameter of about 10 inches, 12 inches, 16 inches, or the like. The at least one second-type of sealing arrangement (120) may also be adapted to provide self-centering to the at least one cover (40) on the motor (20).
[0027] In one exemplary embodiment, the at least one second-type of sealing arrangement (120) may include an O-ring (135) with a predefined cross-sectional shape. The predefined cross-sectional shape may include a circle, a square, a rectangle, a triangle, or the like. As used herein, the term “O-ring” is defined as a gasket or seal in the form of a ring, typically made of rubber and used especially in swiveling joints. In such embodiment, the one or more grooves (70) receiving and holding the O-ring (135) may include one or more groove types such as, but not limited to, single dovetail, double dovetail, rectangular, or the like. In another exemplary embodiment, the at least one second-type of sealing arrangement (120) may include an alternative sealing type with the predefined cross-sectional shape.
[0028] FIG. 3 is a schematic representation of an exemplary embodiment of the sectional view of the structure (10) of FIG. 1 with a detailed view of an integrated-assembly-sealing arrangement (140) of the structure (10) in accordance with an embodiment of the present disclosure. In one embodiment, the structure (10) may also include the integrated-assembly-sealing arrangement (140). The integrated-assembly-sealing arrangement (140) may have flowable material (150) applied in one or more open spaces between at least one pair of entities of one or more integrated assemblies associated with the motor (20). Basically, the one or more integrated assemblies may be a part of the motor (20). In one embodiment, the one or more integrated assemblies may include a metal shaft (160) holding wire harness (170). In such embodiment, the at least one pair of entities of the one or more integrated assemblies may correspond to the metal shaft (160) and the wire harness (170). The wire harness (170) may include phase wire, sensor wire, or the like. Further, in one exemplary embodiment, the flowable material (150) may include at least one of plastic, resin, rubber, polymer, or the like. Moreover, in one exemplary embodiment, the flowable material (150) may be applied with high pressure using an injection molding technique, an alternative forming technique, or the like.
[0029] Furthermore, the integrated-assembly-sealing arrangement (140) may also include a locking assembly (180). The locking assembly (180) may be adapted to lock the flowable material (150) between the at least one pair of entities, thereby preventing displacement of the integrated-assembly-sealing arrangement (140). Basically, in an embodiment, the flowable material (150) may get locked between the at least one pair of entities upon solidification of the corresponding flowable material (150). Further, in one embodiment, the locking assembly (180) may include at least one groove on an inner surface of the at least one pair of entities. Thus, upon receiving the flowable material (150), the corresponding flowable material (150) may enter into the corresponding at least one groove, and hence the flowable material (150) may get locked into the corresponding at least one groove upon solidification.
[0030] FIG. 4 is a schematic representation of an exemplary embodiment of the sectional view of the structure (10) of FIG. 1 with a detailed view of positioning of wool-based material (190) of a third-type of sealing arrangement (200) of the structure (10) in accordance with an embodiment of the present disclosure. Moreover, in an embodiment, to cover the shaft (90) of the motor (20), a cap (210) may be used, and hence to seal any gap between the cap (210) and the shaft (90) of the motor (20), the third-type of sealing arrangement (200) may be needed. Thus, in one embodiment, the structure (10) may include the third-type of sealing arrangement (200) mounted around the shaft (90) of the motor (20) and adjacent to the at least one cover (40). In one exemplary embodiment, the cap (210) may be a metal dust cap. The third-type of sealing arrangement (200) may include the wool-based material (190) attached to an inner surface of the third-type of sealing arrangement (200). The wool-based material (190) may be adapted to seal the third-type of sealing arrangement (200) to the shaft (90) of the motor (20) to prevent the ingression of one or more second-type of particles inside of the motor (20) via the shaft (90) of the motor (20). In one embodiment, the wool-based material (190) may include industrial woolen, felt-material, equivalent fabric, or the like. Basically, in an embodiment, the wool-based material (190) may be attached between the cap (210) and the shaft (90) of the motor (20) using a predefined attaching mechanism such as glue. Further, in one embodiment, the one or more second-type of particles may include the one or more first-type of particles, mud, foreign debris, or the like.
[0031] FIG. 5 is a schematic representation of an exemplary embodiment of an isometric view of the third-type of sealing arrangement (200) of the structure (10) of FIG. 1 in accordance with an embodiment of the present disclosure. The third-type of sealing arrangement (200) may also include a lip element (220) at a periphery of the third-type of sealing arrangement (200). The lip element (220) may be adapted to provide self-centering to the third-type of sealing arrangement (200) on the motor (20). The third-type of sealing arrangement (200) may be attached to the at least one cover (40) using a second predefined fastening mechanism. In one embodiment, the second predefined fastening mechanism may be similar to the first predefined fastening mechanism. In another embodiment, the second predefined fastening mechanism may include bolt-fit fastening mechanism. As used herein, the term “bolt-fit fastening mechanism” is defined as a fastening mechanism in which at least two parts may be fastened with each other using one or more fasteners such as but not limited to, one or more bolts, one or more screws, or the like. In yet another embodiment, the second predefined fastening mechanism may include a self-locking mechanism.
[0032] FIG. 6 is a schematic representation of the motor (20) with the structure (10) for the ingress protection sealing of the motor (20) in accordance with an embodiment of the present disclosure. In one embodiment, the motor (20) may include a magnetic ring (as shown in FIG. 1) (230) positioned below the rim (130). Further, in an embodiment, the motor (20) may also include one or more magnets positioned below the magnetic ring (230). Later, in an embodiment, the motor (20) may also include a stator (as shown in FIG. 1) (240) with a plurality of copper windings. The plurality of coper windings may form one or more electromagnets. Therefore, the motor (20) includes the stator (240) including at least one of the one or more magnets and the one or more electromagnets. Also, in an embodiment, the motor (20) may include a stator hub positioned below the stator (240) with the plurality of copper windings. The motor (20) also includes a rotor (250) including at least one of the one or more magnets and the one or more electromagnets. The rotor (250) is adapted to rotate about the shaft (90) of the motor (20) upon receiving electrical energy from a power source, based on an interaction of the electrical energy and magnetic field of the at least one of the one or more magnets and the one or more electromagnets. Moreover, in one embodiment, the motor (20) may also include one or more bearings (not shown in FIG. 1) being positioned between the stator hub and the shaft (90) of the motor (20). Then, in an embodiment, the shaft (90) of the motor (20) may be provided with the one or more integrated assemblies including the metal shaft (160) holding the wire harness (170).
[0033] Further, the motor (20) also includes the structure (10) for the ingress protection sealing of the motor (20). The structure (10) is mechanically coupled to at least one of the rotor (250) or the stator (240). The structure (10) includes the at least one cover (40). The at least one cover (40) is adapted to prevent the ingression of the one or more first-type of particles inside of the motor (20) upon mounting the at least one cover (40) on at least one of the first side (50) of the motor (20) and the second side (60) of the motor (20). In one embodiment, the second side (60) of the motor (20) may include a brake drum (not shown in FIG. 1) when the corresponding motor (20) may be used in a wheel of a vehicle. As used herein, the term “brake drum” is defined as a medium for friction with the brake pads for the purpose that the wheels will stop on the road. Also, in one embodiment, the second side (60) of the motor (20) may also be provided with an air nozzle when the motor (20) may be used in the wheel of the vehicle. The at least one cover (40) includes the one or more grooves (70) on the inner surface of the at least one cover (40). The one or more grooves (70) are adapted to receive the at least one first-type of sealing arrangement (30) using the first predefined fastening mechanism. The at least one first-type of sealing arrangement (30) includes the plurality of lip-structures (80). The at least one first-type of sealing arrangement (30) is adapted to seal the labyrinth between the shaft (90) of the motor (20) and the at least one cover (40) via the plurality of lip-structures (80), thereby preventing the ingression of the one or more first-type of particles inside of the motor (20) via the labyrinth. The plurality of lip-structures (80) includes the at least one first-type of lip-structure (100) and at least four second-type of lip-structures (110). The at least one first-type of lip-structure (100) is projecting in the first predefined direction. Each of the at least four second-type of lip-structures (110) is projecting in the second predefined direction for creating the projected-lip angle between the at least four second-type of lip-structures (110) and the at least one first-type of lip-structure (100).
[0034] FIG. 7 is a flow chart representing steps involved in a method (280) for ingress protection sealing of a motor in accordance with an embodiment of the present disclosure. The method (280) includes providing at least one cover adapted for preventing ingression of one or more first-type of particles inside of the motor upon mounting the at least one cover on at least one of a first side of the motor and a second side of the motor in step 290.
[0035] The method (280) also includes providing one or more grooves on an inner surface of the at least one cover in step 300.
[0036] Further, the method (280) includes receiving at least one first-type of sealing arrangement using a first predefined fastening mechanism in step 310. In one embodiment, receiving the at least one first-type of sealing arrangement may include receiving the at least one first-type of sealing arrangement by the one or more grooves (70).
[0037] Furthermore, the method (280) also includes providing a plurality of lip-structures for the at least one first-type of sealing arrangement in step 320.
[0038] Furthermore, the method (280) also includes sealing a labyrinth between a shaft of the motor and the at least one cover via the plurality of lip-structures, thereby preventing the ingression of the one or more first-type particles inside of the motor via the labyrinth in step 330. In one embodiment, sealing the labyrinth may include sealing the labyrinth by the at least one first-type of sealing arrangement (30).
[0039] Furthermore, the method (280) also includes providing at least one first-type of lip-structure for the plurality of lip-structures, wherein the at least one first-type of lip-structure is projecting in a first predefined direction in step 340.
[0040] Furthermore, the method (280) also includes providing at least four second-type of lip-structures for the plurality of lip-structures, wherein each of the at least four second-type of lip-structures is projecting in a second predefined direction for creating a projected-lip angle between the at least four second-type of lip-structures and the at least one first-type of lip-structure in step 350.
[0041] Various embodiments of the present disclosure enable providing the ingress protection sealing to the motor more efficiently in comparison to conventional sealings. Also, the structure for the ingress protection sealing can achieve an ingress protection (IP) rating of about greater than or equal to IP67, thereby increasing the durability and reliability of the motor. Further, vehicle performance is improved as the durability and the reliability of the motor are improved. Moreover, as the ingress protection sealing of the motor is improved, when the same motor is used in electric vehicles, the electric vehicles may experience high efficiency, less heat dissipation, and high performance. Also, the structure for the ingress protection sealing proposed in the present disclosure can be extended to all possible motors, thereby making the structure flexible and more reliable.
[0042] While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.
[0043] The figures and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, order of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts need to be necessarily performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.