FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13] TITLE: “A WHEEL HUB ASSEMBLY FOR A VEHICLE”
Name and Address of the Applicant:
TATA MOTORS LIMITED; an Indian company having a registered address at Bombay
House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India.
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure, in general, relates to the field of automobiles. Particularly, but not exclusively, the present disclosure relates to lubrication of an axle of a vehicle. Further, embodiments of the present disclosure relate to a wheel hub assembly connected to the axle shaft and lubrication of at least one bearing of the wheel hub.
BACKGROUND OF THE DISCLOSURE
Vehicle maintenance is vital in order to avoid untimely breakdowns, high repair costs and to ensure drivability of the vehicle is maintained for a longer duration. Maintenance of a vehicle may involve various procedures related to different components, including moving and non-moving components, of the vehicle. There are several moving components in the vehicle which require timely maintenance, each component with its own maintenance interval. Of all the maintenance procedures, lubrication of moving components is essential to prolong the life of the vehicle.
Lubrication may be referred to as the process of channelizing a lubricant between two moving components to reduce frictional engagement therebetween. Failure to lubricate the components of the vehicle may damage the moving components partially or completely. Since assembly and disassembly during maintenance of the bearings may cause damage to the bearings, lubrication and maintenance procedures need to be performed carefully by a skilled person or an operator. Generally, lubrication of the bearings in axle hubs is performed using grease. The axle bearings are lubricated by disassembling them from the axle hub, cleaning the bearings, and the bearings are assembled in the hub after lubricating with fresh grease. Also, there is a high probability that the bearings may be damaged during the maintenance process. Further, to remove the bearings, a wheel mounted on the axle hub has to be disassembled and reassembled after maintenance which is cumbersome. Further, such lubrication and maintenance procedures require the vehicle to be positioned in a vehicle servicing platform or lifting the vehicle off ground for the wheel to be removed and lubrication to be performed.
With the advent in technology, various attempts have been made to reduce the duration of lubricating the bearings and ease the lubrication process. One such conventional approach utilizes a wheel hub with lubrication fittings, that are configured to supply lubricant to the bearings of the wheel hub through plurality of plug fittings fitted on a lateral/circumferential outer portion of the wheel hub and connected to a channel to supply the lubricant to the bearings

of the wheel hub. However, use of pressurized plug fittings on the lateral/circumferential outer portion of the wheel hub tends to render maintenance and lubrication process complicated in view of requirement of disassembling of the wheel hub assembly.
The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the conventional mechanisms.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of the prior art are overcome by a method and a system as claimed and additional advantages are provided through the method and the system as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In one non-limiting embodiment of the present disclosure a wheel hub assembly for a vehicle is disclosed. The wheel hub assembly comprises a wheel hub connectable to an axle shaft, bearings, seals and locking arrangements. The wheel hub is configured to accommodate a wheel on one side. The axle shaft is configured to accommodate the wheel hub and the wheel, at either ends. The axle shaft is connected to the wheel hub by a plurality of fasteners and rotatably connected by at least one bearing of the wheel hub. The wheel hub is defined with a plurality of mounting holes to receive at least one fastener of the plurality of fasteners. At least one mounting hole of the plurality of mounting holes of the wheel hub is defined with a cavity to receive a lubricant fluid for lubricating the at least one bearing of the wheel hub.
In an embodiment, the cavity defined by the at least one mounting hole of the plurality of mounting holes defines a channel to allow flow of the lubricant fluid to the at least one bearing. The channel defined by the at least one mounting hole is tapered to receive and drain the lubricant.
In an embodiment, the wheel hub is rotated to a first position to drain the lubricant fluid channelized between the at least one bearing and the axle through the at least one mounting hole of the plurality of mounting holes.

In an embodiment, the wheel hub is rotated to a second position to receive and channelize the lubricant fluid between the at least one bearing and the axle through the at least one mounting hole of the plurality of mounting holes.
In an embodiment, the wheel hub is fluidly connected to a casing of the axle to allow interflow of the lubricant. The wheel hub comprises a seal to restrict flow of lubricant fluid outside the cavity and the wheel hub.
In an embodiment, the axle shaft comprises at least one visual indication mark to indicate alignment of the at least one mounting hole of the plurality of mounting hole at the first position and the second position of the wheel hub.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
Figure 1 is a cross sectional view illustrating a wheel hub assembly of a vehicle, in accordance with an embodiment of the present disclosure.
Figure 2a is a front view of the wheel hub assembly rotated to a first position of the wheel hub assembly, in accordance with an embodiment of the present disclosure.
Figure 2b is a front view of the wheel hub assembly rotated to a second position of the wheel hub assembly, in accordance with an embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of

the system and method illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, assembly, mechanism, system, method that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
Embodiments of the present disclosure disclose a wheel hub assembly for a vehicle. The wheel hub assembly comprises a wheel hub connectable to an axle shaft, bearings, seals and locking arrangements. The wheel hub is configured to accommodate a wheel on one side. The wheel hub may accommodate one wheel or multiple wheels based on the vehicle, and the same shall not be considered to be a limitation. The axle shaft is configured to accommodate the wheel hub and the wheel, at either ends. The axle shaft is connected to the wheel hub by a plurality of fasteners and rotatably connected by at least one bearing of the wheel hub. The wheel hub is defined with a plurality of mounting holes to receive at least one fastener [hereinafter referred to as “fastener”] of the plurality of fasteners. At least one mounting hole of the plurality of mounting holes of the wheel hub is defined with a cavity to receive a lubricant fluid for lubricating the at least one bearing of the wheel hub. With such configuration, servicing lead-time of removing and/or refilling of the lubrication fluid for the at least one bearing and in-turn the wheel hub and the axle of the wheel is reduced, while requirement of a skilled operator for performing such servicing may not be necessary. Also, disassembling of the wheel or the wheel hub assembly for lubrication may be avoided, thereby reducing effort for servicing of the wheel hub assembly.

The disclosure is described in the following paragraphs with reference to Figures 1, 2a and 2b. In the figures, the same element or elements which have same functions are indicated by the same reference signs. It is to be noted that, the vehicle is not illustrated in the figures for the purpose of simplicity. One skilled in the art would appreciate that the system as disclosed in the present disclosure may be used in any vehicle including but not limiting to heavy and light commercial vehicles, passenger vehicles, load carrying vehicles, and the like.
Figure 1 is an exemplary embodiment of the present disclosure which illustrates a wheel hub assembly (100) of a vehicle [not shown in figures]. The wheel hub assembly (100) [hereinafter referred to as “assembly (100)”] including a wheel hub (1) and an axle shaft (2). The wheel hub (1) is configured to accommodate a wheel [not explicitly shown in Figures] on one side, and a brake unit [not explicitly shown in Figures] is accommodated on the other side of the wheel hub (1) and is positioned opposite to the wheel. The axle shaft (2) is configured to accommodate the wheel hub (1) and the wheel, at either ends. In an embodiment, the wheel hub (1) may be mounted on a casing (7). Further, the casing (7) and the wheel hub (1) may be configured to allow at least a portion of the axle shaft (2) to rotatably extend therethrough so that, connection between the axle shaft (2) and the wheel hub (1) may impart rotational motion on the wheel while maintaining the brake unit to be stationary relative to the wheel hub (1). Here, the axle shaft (2) refers to either a semi-floating, three-quarter floating, or a fully floating axle shaft of the vehicle and the same shall not be considered a limitation.
As best seen in Figure 1, an end of the axle shaft (2) is connected to the wheel hub (1) by a plurality of fasteners (3), while the wheel hub (1) is configured to encompass at least a portion of the axle. To minimize frictional engagement and maintain substantial relative rotational engagement between at least the portion of the casing (7) and the wheel hub (1), at least one bearing (4a, 4b) is included in the wheel hub (1). In the illustrative embodiment, two bearings (4a, 4b) have been depicted, where each of the two bearings (4a and 4b) are included in the wheel hub (1) and is engageable with at least a portion of the casing (7). Here, such number of bearings of the wheel hub (1) should not be construed as a limitation, rather such number of bearings is described for explanation of the present disclosure. Further, for sake of explanation, the two bearings, namely a first bearing (4a) and a second bearing (4b), are depicted. The first bearing (4a) is positioned proximal to an end of the casing (7) and relatively about intermediate portion of the wheel hub (1), while the second bearing (4b) is positioned proximal to an end of the wheel hub (1) and away from the end of the casing (7). Such positioning of the first bearing

(4a) and the second bearing (4b) in the wheel hub (1) may be adapted to maintain the wheel hub (1) substantially parallel to the casing (7) and the axle shaft (2) to prevent buckling or slipping that may affect operation of the wheel hub (1), the axle shaft (2) and the wheel. Also, due to such parallel orientation between the wheel hub (1) and at least a portion of the casing (7) efforts required for lubrication by means of a lubricant fluid such as a lubricating oil may be reduced. In the illustrative embodiment, each of the casing (7) and the wheel hub (1) may be lubricated by the lubricant fluid, where such lubricant fluid maybe fluidly connected to flow between the wheel hub (1) and adapted to flow along and/or about the casing (7) and the axle shaft (2). The wheel hub (1) may be rotatably connected to the casing (7) by the first bearing (4a) and the second bearing (4b). In an embodiment, the first bearing (4a) and the second bearing (4b) may comprise but not limited to tapered roller bearings, ball bearing, bearing hub, and the like. In an embodiment, the second bearing (4b) and the first bearing (4a) are separated by a cavity configured to store and supply the lubricant fluid to the first bearing (4a) and the second bearing (4b).
In an embodiment, the end of the axle shaft (2) being connected to the wheel hub (1) by the plurality of fasteners (3) may include one or more threaded fasteners, where such configuration of the one or more threaded fasteners cannot be considered a limitation. Further, the axle shaft (2) may be defined with a flange portion in order to rigidly connect an end of the axle shaft (2) and the wheel hub (1) by the plurality of fasteners (3).
Referring to Figures 1, 2a and 2b, the wheel hub (1) is defined with a plurality of mounting holes (5) to receive at least one fastener (3’) of the plurality of fasteners (3) in each of such the plurality of mounting holes (5). The plurality of mounting holes (5) may be defined with internal threads corresponding to threads of the plurality of fasteners (3) in order to provide ingress securement therebetween. Further, the plurality of mounting holes (5) of the wheel hub (1) may be aligned with the flange portion of the axle shaft (2), for securement by the plurality of fasteners (3), where each of the plurality of fasteners (3) are substantially oriented parallel to the axle shaft (2) on securement. Additionally, at least one mounting hole (5’) of the plurality of mounting holes (5) of the wheel hub (1) is defined with a cavity (6), as best seen in Figure 1. In an embodiment, the cavity (6) may be defined by extending the mounting hole (5’) of the plurality of mounting holes (5) along the wheel hub (1) and in a direction opposite to portion of the wheel hub (1) securing the wheel. Such configuration of the at least one mounting hole (5’) enables the cavity (6) to receive the lubricant fluid for lubricating the at least one bearing

(4a, 4b) of the wheel hub (1) and at least a portion of the casing (7). Further, the cavity (6) defined by the at least one mounting hole (5’) of the plurality of mounting holes (5) defines a channel to allow flow of the lubricant fluid to the at least one bearing (4a, 4b). In an illustrative embodiment, the channel defined by the cavity (6) of the at least one mounting hole (5’) is tapered to receive and drain the lubricant fluid. The channel may be tapered with a taper angle in a range of 1˚ to 10˚ with respect to the horizontal axis of the wheel hub (1). In an embodiment, the cavity (6) may be configured to allow flow of the lubricant fluid from the at least one mounting hole (5’) to the bearing cavity positioned between the at least one second bearing (4b) and the at least one first bearing (4a), while filling the lubricant fluid.
In an embodiment, the at least one mounting hole (5’) defined with the cavity (6) may be configured to receive a fastener (3’) including different configurations, which may be by way of a different head [or screw head or bolt head], different diameter, different thread profile, different pitch ratio, and the like, which may enable in identification and distinguishing such fastener (3’) and the at least one mounting hole (5’) defined with the cavity (6) from remaining of the plurality of mounting holes (5) and the plurality of fasteners (3). For identification and distinguishing by the operator, the head of the fastener (3’) is selected to be different from that of the remaining of the plurality of fasteners (3). For example, the fastener (3’) may include the head profile being at least one of Allen KeyTM, square, hexagon, octagon, and the like, while remaining of the plurality of fasteners (3) may include head different from that of the fastener (3’) corresponding to the mounting hole (5’) defined with the cavity (6). Due to such configuration, servicing time for assembling, servicing and dismounting of the wheel hub (1) and the axle shaft (2) may be reduced and servicing faults due to irregular fastening may be minimized and/or prevented.
In an embodiment, the wheel hub (1) is rotated to drain the lubricant fluid between the at least one bearing (4a, 4b) and the axle shaft (2) through the at least one mounting hole (5’) defined with the cavity (6). For such draining, the wheel hub (1) may be rotated such that the fastener (3’) corresponding to the mounting hole (5’) defined with the cavity (6) is identified and aligned along vertical axis of the wheel hub (1) to align the wheel hub (1) in a first position of the wheel hub (1), as best seen in Figure 2a. In an embodiment, to align the fastener (3’) relative to the vertical axis of the wheel hub (1), by rotating the wheel and in-turn the wheel hub (1) such that the mounting hole (5’) defined with the cavity (6) is below the axle shaft (2) in the first position. In an embodiment, the at least one mounting hole (5’) of the wheel hub (1) may be proximal to

the ground in the first position. To drain the lubricant fluid from the assembly (100), the wheel hub (1) positioned in the first position, where the fastener (3’) in the at least one mounting hole (5’) with the cavity (6) may be proximal to the ground. The lubricant fluid from the wheel hub assembly (100) may automatically discharge through the cavity (6) and in-turn the at least one mounting hole (5’) due to gravity. In an embodiment, the vehicle may be inclined using a screw jack or other elevation arrangements to drain the lubricant fluid from the wheel hub assembly (100).
In an embodiment, the wheel hub (1) is rotated to channelize the lubricant fluid between the at least one bearing (4a, 4b) and the axle shaft (2) through the at least one mounting hole (5’) defined with the cavity (6). To channelize the lubricant fluid, the wheel hub (1) may be rotated such that the fastener (3’) corresponding to the mounting hole (5’) defined with cavity (6) is identified and aligned at an elevation to align the wheel hub (1) in the second position by rotating the wheel hub (1). For example, the mounting hole (5’) of the wheel hub (1) may be positioned, by rotating the wheel hub (1), at an angular displacement of 10˚ to 270˚ or any other angular displacement from the first position of the wheel hub (1) based on the taper of the channel defined by the cavity (6). To fill the lubricant fluid in the assembly (100), the wheel hub (1) may be positioned in the second position such that the lubricant fluid may be filled through the mounting hole (5’) defined with the cavity (6) when the wheel hub (1) is in the second position. The lubricant fluid from the at least one mounting hole (5’) with the cavity (6) may automatically flow through the cavity (6) and may fill the bearing cavity of the wheel hub (1) due to gravity while the assembly (100) is in the second position. In an embodiment, the vehicle may be inclined using a screw jack or other elevation arrangements to fill the lubricant fluid from the wheel hub assembly (100). In an embodiment, the lubricant fluid may be filled in the cavity (6) of the wheel hub (1) through either vertical funnels or pressurized pumps. In an embodiment, the user may fill the lubricant fluid until the lubricant fluid spills out from the mounting hole (5’) defined with the cavity (6) of the wheel hub (1) and the user may close the mounting hole (5’) defined with cavity (6) by fastening the fastener (3’) with required torque.
In an embodiment, the wheel hub (1) is fluidly connected to the casing (7) to allow interflow of the lubricant fluid. The wheel hub (1) comprises a seal to restrict flow of lubricant fluid outside the cavity (6) and the wheel hub (1). In an embodiment, the lubricant fluid may include various grades of oil used for lubrication of at least a portion of the casing (7) and the wheel hub (1), where the lubricant fluid from the cavity (6) of the wheel hub (1) flows through at least

a portion of the cavity (6) and the casing (7). In an embodiment, the assembly (100) eliminates need for a seal between the wheel hub (1) and the axle shaft (2) to enable mixing of the lubricant fluid in the casing (7) and the cavity (6) of the wheel hub (1).
Referring again to Figures 2a and 2b, the axle shaft (2) comprises at least one visual indication mark (8) to indicate alignment of the at least one mounting hole (5’) of the plurality of mounting holes (5) at the first position and the second position of the wheel hub (1). In an embodiment, the first position of the wheel hub (1) is obtained by rotating the wheel hub (1) such that the at least one visual indication mark (8) on the axle shaft (2)is aligned either along the vertical axis of the wheel hub (1) or perpendicular to the vertical axis of the wheel hub (1). Here, the at least one visual indication mark (8) may be indicated on at least one of the axle shaft (2) and/or the wheel hub (1). For example, the at least one visual indication mark (8) may include a word such as “DRAIN” or a symbol such as a line or combinations thereof indicated on the axle shaft (2). For example, the at least one visual indication mark (8) may be aligned parallel or perpendicular to the ground to indicate the first position of the wheel hub (1). The at least one visual indication mark (8) illustrated in the figures is for illustrative purposes and the same shall not be considered a limitation.
In an embodiment, the at least one visual indication mark (8) may include at least one letter or group of letters or a combination of at least one letter and a symbol or a sign on the axle shaft (2) aligned either individually or aligned together along a particular direction. In an embodiment, the at least one visual indication mark (8) may be positioned above or below or beside the at least one mounting hole (5’).
In an embodiment, the at least one visual indication mark (8) may be positioned at any position on the axle shaft (2) such that it is visible to the user. In an illustrative embodiment, the at least one visual indication mark (8) includes an arrow mark indication aligned at a specific angle accompanied by a word “DRAIN” positioned horizontally above the at least one mounting hole (5’).
In an embodiment, the at least one visual indication mark (8) may include a horizontal line, where the horizontal line represents the first position when the axle shaft (2) is rotated such that the horizontal line is parallel to the ground.

In an embodiment, the at least one visual indication mark (8) may be aligned to indicate the alignment of the cavity (6).
EQUIVALENTS
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is

used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group.
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Referral Numeral:

1 Wheel hub
2 Axle shaft
3 Plurality of fasteners
3’ At least one fastener
4a First bearing
4b Second bearing
5’ At least one mounting hole
5 Plurality of Mounting holes
6 Cavity
7 Casing of axle
8 At least one visual indication mark

We claim:
1. A wheel hub assembly (100) for a vehicle, the assembly (100), comprising:
a wheel hub (1), configured to accommodate a wheel on one side; and an axle shaft (2) configured to accommodate the wheel hub (1) and the wheel, at either ends, the axle shaft (2) is connected to the wheel hub (1) by a plurality of fasteners (3) and rotatably connected by at least one bearing (4a, 4b) of the wheel hub (1);
wherein the wheel hub (1) is defined with a plurality of mounting holes (5) to receive at least one fastener (3’) of the plurality of fasteners (3); and
at least one mounting hole (5’) of the plurality of mounting holes (5) of the wheel hub (1) is defined with a cavity (6) to receive a lubricant fluid for lubricating the at least one bearing (4a, 4b) of the wheel hub (1).
2. The assembly (100) as claimed in claim 1, wherein the cavity (6) defined by the at least one mounting hole (5’) of the plurality of mounting holes (5) defines a channel to allow flow of the lubricant fluid to the at least one bearing (4a, 4b).
3. The assembly (100) as claimed in claim 2, wherein the channel defined by the at least one mounting hole (5’) is tapered to receive and drain the lubricant fluid.
4. The assembly (100) as claimed in claim 2, wherein the wheel hub (1) is rotated to a first position to drain the lubricant fluid channelized between the at least one bearing (4a, 4b) and the axle shaft (2) through the at least one mounting hole (5’) of the plurality of mounting holes (5).
5. The assembly (100) as claimed in claim 1, wherein the wheel hub (1) is rotated to a second position to receive and channelize the lubricant fluid between the at least one bearing (4a, 4b) and the axle shaft (2) through the at least one mounting hole (5’) of the plurality of mounting holes (5).
6. The assembly (100) as claimed in claim 1, wherein the wheel hub (1) is fluidly connected to a casing (7) of the axle to allow interflow of the lubricant fluid.
7. The assembly (100) as claimed in claim 1, wherein the wheel hub (1) comprises a seal to restrict flow of the lubricant fluid outside the cavity (6).
8. The assembly (100) as claimed in claim 5, wherein the axle shaft (2) comprises at least one visual indication mark (8) to indicate alignment of the at least one mounting hole

(5’) of the plurality of mounting holes (5) at the first position and the second position of the wheel hub (1).