Description:TECHNICAL FIELD
[001] The present subject matter relates to a motor assembly, more particularly, a design of a motor shaft disposed in the motor assembly.
BACKGROUND
[002] In general, a motor assembly is of two types, a radial motor, and an axial 5 motor. The above classification of motor assembly is determined on the basis of orientation and configuration of a central axis of the motor assembly, and the configuration of one or more stators and one or more rotors of the motor assembly.
[003] In general, the radial motor comprising a stator being disposed concentrically and coaxially along the central axis of the motor assembly. The stator 10 is concentrically disposed on a motor shaft and a rotor is disposed concentrically on the motor shaft. The rotor is disposed concentrically to the stator and the rotor is configured to surround the stator. The rotor is configured to have a plurality of magnets, and the plurality of magnets is disposed at a predetermined air gap from the stator. 15
[004] In the above configuration, the stator and the rotor is centrally disposed, and the stator remains in a stationary position during the motion of the motor assembly due to cancellation of the centripetal and centrifugal force from the stator and the rotor respectively.
[005] In general, the axial motor is constructed by aligning the stator and the 20 motor along the motor shaft of the motor assembly, with a predetermined air gap provided between the stator and the rotor. The rotor and the stator are not concentric to each other and is separated by the predetermined air gap. The axial motors are configured to have a plurality of combination of rotor and stator based on the power requirement and the required volume density of the motor assembly. 25
[006] In the above construction of the axial motors, the various configurations of the stator and the rotor includes one stator and two rotor motor assembly, two rotor and one stator motor assembly, and one stator and one rotor motor assembly. In general, it is relatively simpler to maintain air gap between one rotor and one stator, however the maintenance of air gap between a plurality of rotor and stator is difficult 30 due to misalignment during assembly of the motor assembly.
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[007] It is essential to maintain uniform air gap between the plurality of rotors and stators in order to maintain high torque output of the motor assembly, and also to minimize the noise and vibrations occurring between the plurality of rotors and the stators which in turn reduces the translational losses of the motor assembly.
[008] Therefore, in order to maintain the adequate air gap between the plurality 5 of rotors and stators in the axial motor, a complex assembly process which uses complex tooling to manufacture each of the plurality of rotors and stators are known. This complex designing and tooling process increases the overall assembly time and also increases the overall complexity in assembly of the axial motor assembly.
[009] Furthermore, in some known arts, during the assembly of the motor 10 assembly, first the rotor is disposed on the motor shaft, thereafter the stator is assembled on the motor shaft. However, during this assembly, there is slippage of the rotor and lot of effort is required at the assembly line to keep the rotor in place while the stator is being assembled on the motor shaft.
[010] Additionally, due to the above difficulty in slippage of the stator, there are 15 misalignment in aligning the stator and the rotor at a requisite angle for achieving the required torque of the motor assembly. This leads to reduced efficiency of the motor assembly and also causes non uniform flow of the flux lines from a north pole to a south pole of a plurality of magnets disposed on the rotor.
[011] Additionally, improper alignment of stator and rotor can cause vibration 20 and noise during operation, leading to a less pleasant user experience. Moreover, an improperly assembled motor may result in a reduction in the motor's output power, torque, and efficiency. This reduction can lead to higher energy consumption, which may result in higher operating costs for the end-user.
[012] Furthermore, an improperly assembled axial flux motor may also result in 25 safety concerns. For example, if the motor is not assembled correctly, it may lead to unexpected malfunctions or failures during operation, which may cause accidents or injuries.
[013] Hence, it is preferred to have a motor assembly which reduces the complexity in construction and assembly of the motor assembly without 30 compromising alignment of the stator and the rotor of the motor assembly.
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SUMMARY
[014] The present subject matter provides a motor assembly including at least one rotor and at least one stator being disposed on a motor shaft. The motor shaft 5 and the rotor being designed to lock with each other during assembly at a predetermined angle for ease of assembly of the motor assembly and also to provide optimal production of flux lines along opposite magnetic poles of the at least one rotor.
[015] As per an aspect of the present invention, a motor assembly comprising at 10 least one stator, at least one rotor, a housing, and a motor shaft. The at least one stator and the at least one rotor is disposed inside the housing. The at least one stator and the at least one rotor is aligned coaxially and concentrically along the motor shaft at a predetermined angle for alignment of one or more magnetic poles of the at least one rotor. The motor shaft is provided with a first protrusion and a second protrusion 15 and the at least one stator comprising a plurality of first groove and the at least one rotor comprising a plurality of second groove. The plurality of first groove and the a plurality of second groove is configured to abut to the first protrusion and the second protrusion.
[016] As per an embodiment, the motor shaft is aligned concentrically along a 20 motor assembly central axis and the motor shaft is configured to have a first tube, a first annular ring and a second annular ring.
[017] As per another embodiment, the first tube of the motor shaft comprising a first end and a second end. The first annular ring of the motor shaft is disposed in proximity of one of the first end and the second end of the first tube of the motor 25 shaft.
[018] As per another embodiment, the first annular ring and the second annular ring are concentrically disposed on the first tube. Further, the diameter of the second annular ring is greater than the diameter of the first annular ring.
[019] As per another embodiment, the first annular ring is configured to include 30 the first protrusion and the second protrusion. The first protrusion is disposed at the
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predetermined angle from the second protrusion. The first protrusion and the second protrusion is disposed diametrically opposite of the second annular ring. [020] As per another embodiment, the first protrusion is configured to receive a first rotor from the at least one rotor, and the second protrusion is configured to receive a second rotor from the at least one rotor. 5
[021] As per another embodiment, the plurality of second groove is disposed centrally along a central hole of each of the first rotor and the second rotor, and the plurality of second groove is configured to extend radially outwards from the central hole of each of the first rotor and the second rotor of the at least one rotor.
[022] As per another embodiment, the plurality of second groove of the at least 10 one rotor is configured to abut and secured on the first protrusion and the second protrusion of the motor shaft of the motor assembly.
[023] As per another embodiment, the at least one rotor comprising a plurality of magnets being disposed along a periphery of the at least one rotor. The plurality of magnets comprising a north pole and a south pole of the one or more magnetic 15 poles of the plurality of magnets.
[024] As per another embodiment, the first rotor of the at least one rotor is affixed to the motor shaft through a snap fir mechanism.
[025] As per another embodiment, the second rotor of the at least one rotor is affixed to the motor shaft through one or more fasteners. The fasteners are inserted 20 and tightened through a plurality of mounting holes. Further a first mounting hole of the plurality of mounting holes is disposed on one surface of the second annular ring, and a second plurality of mounting holes of the plurality of mounting holes is disposed on the second rotor of the at least one rotor.
[026] As per another embodiment, the first protrusion and the second protrusion 25 being configured to have a height in a range of 3-7mm, a width in a range of 0.5-2mm, and a length in a range of 1-3mm.
[027] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. 30
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BRIEF DESCRIPT ION OF THE DRAWINGS
[028] The present invention is described with reference to figures. This invention is implementable in two-wheeled, three wheeled and four wheeled vehicles and any other electrical appliances using an axial motor. The same numbers are used throughout the drawings to reference like features and components. Further, 5 the inventive features of the invention are outlined in the appended claims.
[029] Figure 1 illustrates an exploded view of a motor assembly, in accordance with an embodiment of the present subject matter.
[030] Figure 2 illustrates a cross section view of the motor assembly along a horizontal axis, in accordance with an embodiment of the present subject matter. 10
[031] Figures 3a and 3b illustrates a perspective view of a first protrusion and a second protrusion disposed on a motor shaft of the motor assembly, in accordance with an embodiment of the present subject matter.
[032] Figures 4a and 4b illustrates a front view of a first and a second annular ring of the motor shaft, in accordance with an embodiment of the present subject 15 matter.
[033] Figure 5 illustrates a front view of at least one stator and at least one rotor of the motor assembly, in accordance with an embodiment of the present subject matter.
[034] Figure 6 illustrates an exploded view of a portion of the motor assembly, 20 in accordance with an embodiment of the present subject matter.
[035] Figures 7a and 7b illustrates a perspective view of at least one stator being assembled on the motor shaft, in accordance with an embodiment of the present subject matter.
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DETAILED DESCRIPTION OF THE DRAWINGS
[036] Exemplary embodiments are described with reference to the accompanying drawings. Wherever convenient, the same reference numbers are used throughout the drawings to refer to the same or like parts. While examples and 30 features of disclosed principles are described herein, modifications, adaptations, and
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other implementations are possible without departing from the scope of the disclosed embodiments. It is intended that the following detailed description be considered as exemplary only, with the true scope being indicated by the following claims. [037] The present subject matter is further described with reference to accompanying figures. It should be noted that the description and figures merely 5 illustrate the principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects, and examples of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof. 10
[038] The foregoing disclosure is not intended to limit the present disclosure to the precise forms or particular fields of use disclosed. As such, it is contemplated that various alternate embodiments and/or modifications to the present disclosure, whether explicitly described or implied herein, are possible in light of the disclosure. Having thus described embodiments of the present disclosure, a person of ordinary 15 skill in the art will recognize that changes may be made in form and detail without departing from the scope of the present disclosure. Thus, the present disclosure is limited only by the claims.
[039] Additionally, all numerical terms, such as, but not limited to, “first”, “second”, “third”, “primary”, “secondary”, “main” or any other ordinary and/or 20 numerical terms, should also be taken only as identifiers, to assist the reader's understanding of the various elements, embodiments, variations and/or modifications of the present disclosure, and may not create any limitations, particularly as to the order, or preference, of any element, embodiment, variation and/or modification relative to, or over, another element, embodiment, variation 25 and/or modification.
[040] Hence it is an object of the present invention to provide a motor assembly with a construction and ease of assembly of at least a rotor and at least a stator for preventing misalignment of the stator and the rotor in the motor assembly and also to overcome other related problems known in the art as explained in the background 30 problem.
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[041] It is also an object of the present invention to reduce overall part count and eliminate use of multiple fasteners for assembling the stator and the rotor in the motor assembly.
[042] It is also an object of the present invention to reduce the effect of vibrations and noise arising from the motor assembly due to misalignment of the stator and the 5 rotor.
[043] It is also an object of the present invention to reduce slippage of the stator and the rotor during motor assembly and improve efficiency of the motor assembly.
[044] It is also an object of the present invention to provide ease of assembly and also reduce overall assembly time of the motor assembly. 10
[045] It is also an object of the present invention to reduce separate machining and tooling for each of the at least one stator and at least one rotor and thereby simplify the assembly process of the motor assembly.
[046] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 15
[047] Figure 1 illustrates an exploded view of a motor assembly (100), in accordance with an embodiment of the present subject matter. A motor assembly (100) is an axial motor assembly is one embodiment. The motor assembly (100) comprises a housing (102a, 102b). The housing (102a, 102b) being split into one or more parts and includes a first part (102a) and a second part (102b) in one 20 embodiment. The first part (102a) and the second part (102b) conform with each other in shape, size, dimensions, and profile. The housing (102a, 102b) includes a central projection (102c) for receiving a motor shaft (110) of the motor assembly (100). The motor shaft (100) is disposed between the housing (102a, 102b) and is sandwiched fixedly between the first part (102a) and the second part (102b) through 25 a first bearing (104a) and a second bearing (104b).
[048] The motor assembly (100) further comprising at least one stator (108) and at least one rotor (106a, 106b). The at least one stator (108) is disposed and sandwiched between the at least one rotor (106a, 106b) in one embodiment. In another embodiment, the at least one rotor (106a, 106b) is sandwiched and disposed 30 between the at least one stator (108). The at least one stator (108) and the at least
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one rotor (106a, 106b) being disposed on the motor shaft (110) and the at least one stator (108) and the at least one rotor (106a, 106b) is centrally and coaxially disposed on the motor shaft (110). The at least one stator (108) and the at least one rotor (106a, 106b) is attached on the motor shaft (110) and the housing (102a, 102b) through one or more fasteners (112). This configuration provides a compact packaging of the at 5 least one stator (108) and the at least one rotor (106a, 106b) of the motor assembly (100). [049] The housing (102a, 102b) is also provided to accommodate one or more reduction gears (114a) of the motor assembly (100), and the one or more reduction gears (114a) are attached fixedly to the second part (102b) of the housing (102a, 10 102b) using one or more bearings and fasteners (114b, 114c, 114d, 114e).
[050] Figure 2 illustrates a cross section view of the motor assembly (100) along a horizontal axis, in accordance with an embodiment of the present subject matter. The motor assembly (100) is provided with a first rotor (106a) and a second rotor (106b) of the at least one rotor (106a, 106b). The motor assembly (100) further 15 includes the first rotor (106a) being disposed at a first predetermined air gap (200a), and the second rotor (106b) being disposed at a second predetermined air gap (200b). The first predetermined air gap (200a) and the second predetermined air gap (200b) is defined between the first rotor (106a) and the at least one stator (108), and the second rotor (106b) respectively. The motor shaft (110) is provided along a motor 20 assembly horizontal axis (X-X’) and the at least one rotor (106a, 106b) and the at least one stator (108) is coaxially and concentrically disposed on the motor shaft (110) along the motor assembly horizontal axis (X-X’).
[051] Figures 3a and 3b illustrates a perspective view of a first protrusion (308a) and a second protrusion (308b) disposed on the motor shaft (110) of the motor 25 assembly (100), in accordance with an embodiment of the present subject matter. Figures 4a and 4b illustrates a front view of a first and a second annular ring (302, 306) of the motor shaft (110), in accordance with an embodiment of the present subject matter. For brevity, figures 3a, 3b, 4a and 4b will be discussed together. The motor shaft (110) includes a first tube (300) and the first tube (300) is aligned along 30 the motor assembly horizontal axis (X-X’). The first tube (300) includes a first end
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(300a) and a second end (300b). The first end (300a) and the second end (300b) abuts on the central projection (102c) of the housing (102a, 102b). The first tube (300) includes a first annular ring (302) and a second annular ring (306). The second annular ring (306) is diametrically greater than the first annular ring (302). The first annular ring (302) and the second annular ring (306) are coaxially and concentrically 5 disposed on the first tube (300). In one embodiment, the first annular ring (302) is disposed in proximity to the first end (300a) and the second annular ring (306) is disposed centrally on the first tube (300). In another embodiment, the first annular ring (302) has a greater width than the second annular ring (306). [052] In one embodiment, the first annular ring (302) includes a first protrusion 10 (308a) and a second protrusion (308b). The first protrusion (308a) and the second protrusion (308b) are disposed on diametrically opposite ends of the second annular ring (306). In one embodiment, the first protrusion (308a) and the second protrusion (308b) being configured to have a height in a range of 3-7mm, a width in a range of 0.5-2mm, and a length in a range of 1-3mm. 15
[053] In one embodiment, the axial flux motor assembly (100) with the above at least one rotor (106a, 106b) configuration, it is necessary to ensure that a north pole (500a) of one or more magnetic poles (500a, 500b) of the first rotor (106a) of the at least one rotor (106a, 106b) must align with a south pole (500b) of the one or more magnetic pole (500a, 500b) of a magnet of the first rotor (106a) of the at least one 20 rotor (106a, 106b) (as shown in figure 6). Therefore, there is an offset of one pole pitch between the first rotor (106a) and the second rotor (106b). In order to ensure this pitch, the first protrusion (308a) and the second protrusion (308b) are provided in the motor shaft (110). In one embodiment, similar counter protrusions can be provided on the at least one rotor (106a, 106b). In one embodiment, the first 25 protrusion (308a) and the second protrusion (308b) is disposed at predetermined angles for ease of assembly. The predetermined angle is calculated by the following formula.
𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴 𝑏𝑏𝑏 𝑏𝑏𝑏𝑏𝑏 𝑡 ℎ𝑒 𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 𝑝𝑝𝑝 𝑝𝑝𝑝𝑝𝑝 (𝑎𝑎𝑎𝑎𝑎𝑎𝐴𝐴𝑝𝑝ℎ𝑎𝑎)=360𝑁𝑁𝑁𝑁𝑁𝑁𝑏𝑏𝐴𝐴𝑝𝑝 𝑜 𝑜𝑜 𝑝𝑝𝑝𝑝𝑝 𝑝𝑝 𝑜 𝑡 ℎ𝑒 𝑝𝑝𝑝𝑝𝑏𝑏𝑝𝑝𝑝𝑝
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For examples:
1. For a 2-pole rotor: alpha = 360/2= 180 degrees
2. For a 4-pole rotor: alpha= 360/4=90 degrees
3. For 16-pole rotor: alpha =360/16=22.5 degrees
[054] In another embodiment, the motor shaft (110) include plurality of grooves 5 and the at least one rotor (106a, 106b) includes plurality of protrusions. In one embodiment, the second annular ring (306) includes a first mounting hole (406) of plurality of mounting holes (406, 408) for mounting the second rotor (106b) to the motor shaft (110). The first mounting hole (406) is disposed on one surface (310) of said second annular ring (306). 10
[055] Figure 5 illustrates a front view of at least one stator (108) and at least one rotor (106a, 106b) of the motor assembly (100), in accordance with an embodiment of the present subject matter. The at least one stator (108) includes a plurality of first groove (402a) and the at least one rotor (106a, 106b) includes a plurality of second groove (402). The plurality of first groove (402a) and the plurality of second groove 15 (402) being configured to align with each other during assembly of the motor assembly (100). The each of the plurality of second groove (402) abuts and secures with each of the first protrusion (308a) and the second protrusion (308b) of the motor shaft (110) during assembly of the motor assembly (100) (as shown in figure 7), and thereby locks the at least one stator (108) and the at least one rotor (106a, 106b) in 20 position on the motor shaft (110). The plurality of second groove (402) is disposed around a central hole (400) of the at least one rotor (106a, 106b). In one embodiment, the first rotor (106a) is affixed to the motor shaft (110) through a snap fit or a press fit mechanism.
[056] Figure 6 illustrates an exploded view of a portion of the motor assembly 25 (100), in accordance with an embodiment of the present subject matter. The first rotor (106a) of the at least one rotor (106a, 106b) is press fitted to the motor shaft (110) with the help of the first end (300a) of the motor shaft (110), which is acting as a stopper, and thus prevents any axial movement of the first rotor (106a). The motor shaft (110) is then vertically inserted into the housing (102a, 102b) and the 30
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first end (300a) can either be press fitted to the motor shaft (110) or the first end (300a) can be press fitted to the housing (102a, 102b). Thereafter, one end of the first rotor (106a) and the motor shaft (110) is disposed inside the housing (102a, 102b), and then the at least one stator (108) slides down the motor shaft (110) using the central hole (400). In one embodiment, an inner diameter of the at least one stator 5 (108) is higher than an outer diameter of the motor shaft (110) as it makes it easy to guide and rotate the at least one stator (108) inside the housing (102a, 102b). The first groove (402a) on the at least one stator (108) ensures that there is one possible way to arrange the at least one stator (108) inside the housing (102a, 102b). Once the at least one stator (108) is aligned correctly to the housing (102a, 102b) the at 10 least one stator (108) automatically slides down on the motor shaft (110) until the second annular ring (306). Finally, the second rotor (106b) other is assembled onto the motor shaft (110) through the plurality of mounting holes (406, 408) using one or more fasteners. [057] Figures 7a and 7b illustrates a perspective view of at least one stator (108) 15 being assembled on the motor shaft (110), in accordance with an embodiment of the present subject matter. In one embodiment, a length (L) between the first end (300a) and the second end (300b) of the motor shaft (110) is calculated to ensure the air gap (200a, 200b) between the at least one stator (108) and the at least one rotor (106a, 106b) can be maintained. In one embodiment, the first end (300a) and the second 20 end (300b) being configured to act as rotor bearing stopper to prevent axial movement of the at least one rotor (106a, 106b). The length (L) is calculated as:
𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐴𝐴𝐴𝐴𝐴𝐴𝑏𝑏ℎ (𝐿𝐿)=2∗(𝑀𝑀𝑎𝑎𝐴𝐴𝐴𝐴𝐴𝐴𝑏𝑏 𝑡 ℎ𝑖 𝑖𝑖𝐴𝐴𝐴𝐴𝑝𝑝𝑝𝑝+𝐿𝐿𝐴𝐴𝐴𝐴𝐴𝐴𝑏𝑏ℎ 𝑜 𝑜𝑜 𝑡 ℎ𝑒 𝑝𝑝𝑏𝑏𝑎𝑎𝑏𝑏𝑝𝑝𝑝𝑝 𝑦𝑦𝑝𝑝𝑖𝑖𝐴𝐴+𝐿𝐿𝐴𝐴𝐴𝐴𝐴𝐴𝑏𝑏ℎ 𝑜 𝑜𝑜 𝑡 ℎ𝑒 𝑝𝑝𝑏𝑏𝑎𝑎𝑏𝑏𝑝𝑝𝑝𝑝 𝑝𝑝𝐴𝐴𝑝𝑝𝑏𝑏+𝑎𝑎𝑎 𝐴𝐴𝑎𝑎𝑝𝑝 𝑤 𝑤𝑤𝑤 ℎ ) 25
This length coupled with the assembly of the at least one stator (108) on the housing (102a, 102b) will ensure that the proper air gap is maintained between the at least one stator (108) and the at least one rotor (106a, 106b). The first end (300a) and the second end (300b) can either be press fitted on the motor shaft (110) and also on the 30 housing (102a, 102b).
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[058] Various embodiments of the invention provides a motor assembly including at least one rotor and at least one stator being disposed on a motor shaft. The motor shaft and the rotor being designed to lock with each other during assembly at a predetermined angle for ease of assembly of the motor assembly and also to provide optimal production of flux lines along opposite magnetic poles of the at least 5 one rotor.
[059] The present invention is a motor assembly comprising at least one stator, at least one rotor, a housing, and a motor shaft. The at least one stator and the at least one rotor is disposed inside the housing. The at least one stator and the at least one rotor is aligned coaxially and concentrically along the motor shaft at a predetermined 10 angle for alignment of one or more magnetic poles of the at least one rotor.
[060] The present claimed invention solves the technical problem of misalignment of the at least one stator and the at least one rotor during assembly of the motor assembly thereby increasing noise and vibrations of the motor assembly and in turn reducing the overall efficiency of the motor assembly. 15
[061] Specifically, the claimed motor assembly uniform air gap between the stator and the rotor. Further the claimed motor assembly aligns and locks the position of the stator and the rotor in place and thus prevents misalignment of the stator and the rotor.
[062] Additionally, the configuration of the first protrusion and the second 20 protrusion of the motor shaft abuts with the plurality of grooves of the stator and the rotor and thus keeps the stator and the rotor locked in place during assembly of the motor.
[063] Furthermore, the first end and the second end of the motor shaft act as stoppers to assemble the motor shaft in the housing and also prevents unwanted 25 movement of the motor shaft during assembly of the stator and the rotor of the motor assembly.
[064] The present invention also provides advantages of ease of assembly of the motor assembly by locking the stator and the rotor with the motor shaft and thereby eliminates the use of complex tools and assembly techniques. 30
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[065] In light of the above-mentioned advantages and the technical advancements provided by the disclosed motor assembly comprising the at least one stator and the at least one rotor being locked at a predetermined angle on the motor shaft, the claimed invention as discussed above is not routine, conventional, or well understood in the art, as the claimed invention enable the following solutions to the 5 existing problems in conventional technologies. Further, the claimed invention clearly bring an improvement in the configuration and construction of the at least one stator and the at least one rotor and the motor shaft for ease of assembly of the motor assembly as the claimed invention provide a technical solution to a technical problem. 10
[066] While the present invention has been shown and described with reference to the foregoing preferred embodiments, it will be apparent to those skilled in the art that changes in form, connection, and detail may be made therein without departing from the spirit and scope of the invention.
Reference Numerals:
100 motor assembly
102a, 102b housing 5
104a, 104b first and second bearing
106a, 106b at least one rotor
108 at least one stator
110 motor shaft
112 one or more fasteners 10
114a one or more reduction gears
114b, 114c, 114d, 114e one or more bearings and fasteners
200a, 200b predetermined air gap
300 first tube
300a, 300b first end, second end 15
302 first annular ring
306 second annular ring
308a first protrusion
308b second protrusion
400 central hole 20
402 plurality of second groove
402a plurality of first groove
406, 408 plurality of mounting holes
500a, 500b one or more magnetic poles , Claims:I/We claim:
1. A motor assembly (100) comprising:
at least one stator (108);
at least one rotor (106a, 106b);
a housing (102a, 102b); and 5
a motor shaft (110);
wherein said at least one stator (108) and said at least one rotor (106a, 106b) being disposed inside said housing (102a, 102b);
wherein said at least one stator (108) and said at least one rotor being aligned coaxially and concentrically along said motor shaft 10 (110) at a predetermined angle for alignment of one or more magnetic poles of said at least one rotor (106a, 106b); and
wherein said motor shaft (110) being provided with a first protrusion (308a) and a second protrusion (308b) and said at least one stator (108a) comprising a plurality of first groove (402a) and 15 said at least one rotor (106a, 106b) comprising a plurality of second groove (402); and
wherein said plurality of first groove (402a) and said plurality of second groove (402) being configured to abut to said first protrusion (308a) and said second protrusion (308b). 20
2. The motor assembly (100) as claimed in claim 1, wherein said motor shaft (110) being aligned concentrically along a motor assembly central axis (X-X’), and wherein said motor shaft (110) being configured to have a first tube (300), a first annular ring (302), and a second annular ring (306).
3. The motor assembly (100) as claimed in claim 2, wherein said first tube 25 (300) comprising a first end (300a) and a second end (300b), wherein said first annular ring (302) being disposed in proximity of one of said first end (300a) and said second end (300b) of said first tube (300).
4. The motor assembly (100) as claimed in claim 2, wherein said first annular ring (302) and said second annular ring (306) being concentrically disposed 30
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on said first tube (300), and wherein a diameter of said second annular ring (306) being greater than a diameter of said first annular ring (302).
5. The motor assembly (100) as claimed in claim 4, wherein said first annular ring (302) being configured to include said first protrusion (308a) and said second protrusion (308b), and wherein said first protrusion (308a) being 5 disposed at said predetermined angle from said second protrusion (308b), and wherein said first protrusion (308a) and said second protrusion (308b) being disposed diametrically opposite of said second annular ring (306), and wherein said predetermined angle being between 0 to 10 degrees.
6. The motor assembly (100) as claimed in claim 5, wherein said first 10 protrusion (308a) being configured to receive a first rotor (106b) from said at least one rotor (106a, 106b) and said second protrusion (308b) being configured to receive a second rotor (106a) from said at least one rotor (106a, 106b).
7. The motor assembly (100) as claimed in claim 1, wherein said plurality of 15 second groove (402) being disposed centrally along a central hole (400) of said at least one rotor (106a, 106b), and wherein said plurality of second groove (402) being configured to extend radially outwards from said central hole (400) of said at least one rotor (106a, 106b).
8. The motor assembly (100) as claimed in claim 7, wherein said plurality of 20 second groove (402) of said at least one rotor (106a, 106b) being configured to abut and secure to said first protrusion (308a) and said second protrusion (308b) of said motor shaft (110) of said motor assembly (110).
9. The motor assembly (100) as claimed in claim 1, wherein said at least one rotor (106a, 106b) comprising a plurality of magnets (500a, 500b) being 25 disposed along periphery of said at least one rotor (106a, 106b), wherein said plurality of magnets (500a, 500b) comprising a north pole being adjacent to a south pole of said one or more magnetic poles of said plurality of magnets (500a, 500b).
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10.The motor assembly (100) as claimed in claim 6, wherein said first rotor(106a) of said at least one rotor (106a, 106b) being affixed to said motorshaft (110) through a snap fit mechanism.
11.The motor assembly (100) as claimed in claim 6, wherein said second rotor(106b) being affixed to said motor shaft (110) through one or more fasteners5 (112), wherein said one or more fasteners (112) being inserted and tightenedthrough a plurality of mounting holes (406, 408), a first mounting hole (406)of said plurality of mounting holes (406) being disposed on one surface(310)of said second annular ring (306), and a second plurality of mountingholes (408) of said plurality of mounting holes (406, 408) being disposed10 on said second rotor (106b) of said at least one rotor (106a, 106b).
12.The motor assembly (100) as claimed in claim 5, wherein said firstprotrusion (308a) and said second protrusion (308b) being configured tohave a height in a range of 3-7mm, a width in a range of 0.5-2mm, and alength in a range of 1-3mm.15
Dated 19 day of July 2023
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