Description:A FUEL FILLING STRUCTURE AND A METHOD OF ASSEMBLY
TECHNICAL FIELD
[0001] The present subject matter described herein, relates to a fuel filing structure and a method of assembling the same on a vehicle. More particularly, the present invention relates to the fuel filling structure and its assembling on curved side body outer surface of the vehicle to receive counter box of fuel receptacle. The present fuel filling structure comprises a plurality of adapter components having adapter inner component and adapter outer component to avoid errors in the assembly of adapter components on the curved side body outer surface of the vehicle.
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention.
[0003] Automobiles typically include a fuel-filling structure including a fuel cap and a provision for filler neck or fuel receptacle installed on the side body outer surface of the vehicle. Generally, the fuel filling structure has a box profile and a lid to cover the structure. The fuel filling structure can be assembled on the side body of vehicle defining flat outer surface. For the curved side body outer surface of the vehicle, there is requirement for multiple parts to be assembled together for efficient and accurate assembly/mounting of the fuel filling structure.
[0004] In the existing solutions, the fuel filling structure has a plurality of adapter components. One of the part of the fuel filling structure is installed from inside and the other part is assembled from outside of the vehicle area. The side body outer surface is sandwiched in between the inner and the outer component of fuel filling structure having a plurality of adapter components.
[0005] Technical Problem: One of the adapter component, i.e., adapter outer component is housed in the hole provided on the side body outer surface, and the adapter inner component is provided from the inside of the vehicle area, where, it forms a blind zone area for the operator to assemble the adapter components and the conventional type of screw bolting could not be used due to the space constraint and more over the side body outer surface is a skin part which may receive dent or screw marks which is not accepted on the side body outer surface of the vehicle, resultantly creates technical problems. Further, due to the blind zone area, an operator needs one hand to hold the adapter inner component from inner side of the vehicle and another hand to hold the adapter outer component from outer side of the vehicle. Further, the operator would need another support to fix or join the two components and hence there is a tendency for the components to fall or misalign from its original position. Another technical problem is inconvenience in assembly and more time is required for assembly.
[0006] Therefore, a simple and in-expensive solution is required where an inner component can hold an outer component and ensure the correct orientation of the inner and outer components with respect to the hole provided on the side body outer surface of the vehicle.
[0007] The information disclosed in this background of the subject matter section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
OBJECTS OF THE DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed herein below.
[0009] The principal object of the present subject matter is to provide a fuel filling structure comprising an adaptor mechanism for receiving a fuel receptacle and a method for assembly of the fuel filling structure on side body outer surface of the vehicle.
[0010] Another object of the present subject matter is to provide an adapter mechanism to mount the fuel filling structure for receiving counter box for a fuel receptacle at curved surface of the side body outer surface or curved/contoured side body panel of the vehicle.
[0011] Another object of the present subject matter is to provide a fuel filling structure having adapter mechanism with a plurality of components for ease in assembly process.
[0012] Another object of the present invention is to provide an adapter mechanism for giving smooth aesthetic appeal to the side body panel of the vehicle without any dent or screw marks.
[0013] Still another object of the present invention is to provide a fuel filling structure capable of withstanding weight of a fuel filling nozzle.
[0014] Still another object of the present subject matter is to provide correct orientation to the adapter components assembly while lock nut is being torqued to lock the adapter components assembly.
[0015] Still another object of the present invention is to provide a system having a fuel filling structure with adapter mechanism for reducing torque losses at the mounting locations of a lock nut.
[0016] Yet another object of the present invention is to provide a method for the fuel filling structure with an adapter mechanism for easy assembly of a counter box in less time.
[0017] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawings.
SUMMARY
[0018] This summary is provided to introduce concepts related to a fuel filling structure and a method to mount counter box for receiving a fuel receptacle on contoured side body panel of a vehicle. The fuel filling structure comprising a plurality of adapter components such as an adapter inner component and an adapter outer component. The adapter outer component defining a flange inclined at a predetermined angle at one end to conform with the contoured surface of the side body panel of the vehicle and a plurality of threads provided on outer circumference at other end, an adapter inner component defining a flange complementary to the flange of the adapter outer component; and a lock nut provided with a plurality of threads on its inner circumference complementary to the plurality of threads of the adapter outer component, where the lock nut rotatably mounted on the adapter outer component and apply compressive rotational force on the adapter inner component to sandwich the side body panel in between the adapter inner component and the adapter outer panel. The adapter inner component includes at least two protrusions provided around the guided slot profile and extending away from flat surface of the flange to position the adapter inner component on a guiding slot of the hole provided on the side body panel. The adapter outer component includes a plurality of integrally formed projections at an equal angular distance on the outer circumference. The adapter inner component includes a plurality of snaps provided around inner circumference complementary to the plurality of integrally formed projections of the adapter outer component to achieve snap lock between the adapter inner component and the adapter outer component. The adapter outer component includes a guiding protrusion portion having a plurality of guiding ribs in longitudinal direction on outer surface, and the adapter inner component includes a guided slot profile complementary to the guiding protrusion portion.
[0019] In an aspect, a plurality of crushing ribs is provided adjacent to the inner surface of the flange on the outer circumference of the adapter outer component to maintain clearance with the hole of the side body outer panel to control the gap with respect to the Rear Combination Lamp of the vehicle and eliminate the positioning error.
[0020] In an aspect, the adapter inner component includes a plurality of serrations portions provided at equal angular distance on bottom surface of the adapter inner component.
[0021] In an aspect, the lock nut includes a plurality of serrations portions provided on upper surface complementary to the plurality of serrations portions provided on the bottom surface of the adapter inner component, where the plurality of serrations portions of the lock nut mesh with the plurality of serrations portions of the adapter inner component and creates sound to indicate final torque.
[0022] In an aspect, the plurality of integrally formed projections is provided in between the flange and the plurality of threads.
[0023] In an aspect, one side of the adapter outer component defines length (L1) and other side defines length (L2) where the length (L2) is more than the length (L1).
[0024] In an aspect, the adapter inner component includes a plurality of projections provided around outer circumference for strength and gripping purpose.
[0025] In an aspect, the lock nut includes a plurality of projections provided at an angular distance around outer circumference for strength and gripping purpose.
[0026] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The illustrated embodiments of the subject matter will be understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
[0028] Fig. 1a illustrates an exploded view of a fuel filling structure having an adapter outer component, an adapter inner component, and a lock nut along with various sealings, in accordance with an embodiment of the present subject matter;
[0029] Fig. 1b illustrates an exploded view indicating mounting directions of the fuel filling structure with a hole in the sheet body outer surface of a vehicle body, in accordance with an embodiment of the present subject matter;
[0030] Fig. 1c illustrates another exploded side view of the fuel filling structure of Fig. 1b showing mounting of inner component with the sheet body outer panel, in accordance with an embodiment of the present subject matter;
[0031] Fig. 2a illustrates a top view of the adapter inner component of Fig. 1a, in accordance with an embodiment of the present subject matter.
[0032] Figs. 2b and Fig. 2c illustrate a bottom perspective view of the adapter inner component of Fig. 1a, in accordance with an embodiment of the present subject matter;
[0033] Fig. 2d illustrates a mounting of the adapter inner component with the sheet body inner surface from inner side of the vehicle, in accordance with an embodiment of the present subject matter;
[0034] Fig. 2e illustrates a top perspective view of the adapter inner component of Fig. 1a, showing a slot and a plurality of guiding protrusions to help in guiding the adapter inner component in the slot provided in the sheet body panel of the vehicle, in accordance with an embodiment of the present subject matter;
[0035] Figs. 3a, 3b, and 3c illustrate perspective views of the adapter outer component of fig. 1a to be housed in the hole provided in the sheet body outer surface from outside as shown in fig. 1b, in accordance with an embodiment of the present subject matter;
[0036] Fig. 4 illustrates an isometric view of the assembly of the adapter outer component with the adapter inner component, in accordance with an embodiment of the present subject matter; and
[0037] Fig. 5 illustrates top view of the locking nut of Fig. 1a having a plurality of serrations and a plurality of female threads, in accordance with an embodiment of the present subject matter.
[0038] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
[0039] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0040] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
[0041] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a", “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “includes” and/or “including” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
[0042] It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
[0043] In addition, the descriptions of "first", "second", “third”, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly.
[0044] Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
[0045] The present invention discloses a fuel filling structure and a method for assembly of the fuel filling structure on curved side body outer panel of the vehicle. The present invention provides a system having a fuel filling structure to facilitate mounting of counter box to receive a fuel receptacle on curved sheet of the side body outer panel of a vehicle. The fuel filling structure is based on an adapter mechanism having a plurality of components having an adapter inner component and an adapter outer component to be mounted on the curved sheet of the side body outer panel of the vehicle to eliminate error in assembly of the fuel filling structure and effectively mount the fuel filling structure on the curved side body outer panel of the vehicle.
[0046] Fig. 1a illustrates an exploded view of the fuel filling structure 100 according to an embodiment of the present subject matter. The fuel filling structure 100 comprising an adapter outer component 101, an adapter inner component 102, and a lock nut 103.
[0047] Referring to figs. 1b and 1c together, illustrating mounting direction of the components of the fuel filling structure 100 according to an embodiment of the present subject matter. The side body panel 105 of the vehicle is made of sheet material and defines contoured/curved profile. The side body panel 105 define a hole 104 to mount the fuel filling structure 100. There is a provision to provide a rubber seal in between the adapter outer component 101 and outer surface of the side body panel 105.
[0048] In an embodiment, the housing of the adapter outer component 101 and adapter inner component 102 may define structure of the fuel filling structure 100. The adapter outer component 101 is housed inside the adapter inner component 102. The lock nut 103 is provided to rotatably mount on the adapter outer component 101 and apply compressive rotational force on the adapter inner component 102 towards the side body panel 105.
[0049] Fig. 1b illustrates direction of mounting of the components of the fuel filling structure. As shown, the adapter inner component 102 and the lock nut 103 to be mounted from inner side of the vehicle and the adapter outer component 101 to be mounted from outer side of the vehicle. Fig. 1c shows mounted view of the adapter inner component 102 on inner surface of the side body panel 105. The hole 104 of the side body panel 105 has a guiding slot/cut 104a (shown in fig. 2d) to guide the mounting of the adapter inner component 102 and the adapter outer component 101.
[0050] Referring to Figs. 3a, 3b, and 3c together, illustrating structural configuration of the adapter outer component 101 according to an embodiment of the present subject matter. The adapter outer component 101 may define a divergent shape profile at one end and straight profile at other end. The adapter outer component 101 having a flange 201 provided at a predetermined angle at one end to conform with contoured surface of the side body panel 105 of the vehicle and a plurality of threads 203 provided on outer circumference at other end which defines straight profile. The adapter outer component 101 includes a guiding protrusion portion 204 having a plurality of guiding ribs, where the number of ribs is in range 2 to 8, preferably number of ribs is in range 3 to 5 in longitudinal direction on outer divergent surface 205. However, the number of ribs are not limited to the given range of 2 to 8, it can be in any number starting from 1.
[0051] As shown in fig. 3a, the adapter outer component 101 includes a plurality of integrally formed projections 202 at an equal angular distance preferably at an angular distance of 90o on the outer circumference. Further, the number of integrally formed projections 202 may be in range 2 to 8, preferable 4 in number. The plurality of integrally formed projections 202 is provided in between the flange 201 and the plurality of threads 203. As shown, one side of the adapter outer component 101 defines length ‘L1’ and other side defines length ‘L2’ where the length ‘L2’ is more than the length ‘L1’.
[0052] As shown in fig. 3c, a plurality of crushing ribs 206 is provided adjacent to the inner surface of the flange 201 on the outer circumference of the adapter outer component 101 to maintain clearance with the hole 104 of the body side panel 105 to control the gap with respect to the Rear Combination Lamp (RCL) of the vehicle and eliminate the positioning error. The gap here means from the cutline after which rear headlamp is mounted. If this position is shifted then there is chance minimal gap between the two parts, which is not acceptable. The crushing ribs 206 may define a predetermined clearance, for example, 0.5 mm from the hole 104 of the side body panel 105. If the gap between the adapter outer component 101 and the hole 104 reduces, it can create concern for deposition of dust and other foreign particles.
[0053] Referring to fig. 2a, 2b, 2c, 2d, and 2e together, illustrate structural configuration of the adapter inner component 102 according to an embodiment of the present subject matter. The adapter inner component 102 may define a divergent shape having a flange 102a provided at a predetermined angle at one end complementary to the flange 201 of the adapter outer component 101 and a plurality of snaps 102d at inner circumference of other end. The plurality of snaps 102d are placed at equal angular distance, preferably 90o. The plurality of snaps 102d provided around inner circumference complementary to the plurality of integrally formed projections 204 of the adapter outer component 101 to achieve snap lock mechanism between the adapter inner component 102 and the adapter outer component 101.
[0054] The adapter inner component 102 includes a guided slot profile 102b complementary to the guiding protrusion portion 204 at inner surface. The guided slot profile 102b receives the guiding protrusion (or snaps) portion 202. Referring to figs. 2d and 2e, the adapter inner component 102 further includes at least two protrusions 102c provided around the guided slot profile 102b preferably at both ends of the guided slot profile 102b and extending away from flat surface of the flange 102a to position the adapter inner component 102 on the guiding slot 104a of the hole 104 provided on the side body outer panel 105.
[0055] As shown in the fig. 2c, adapter inner component 102 includes a plurality of serrations 102f provided at equal angular distance on bottom surface 102g of the adapter inner component 102.
[0056] In an aspect, the adapter inner component 102 may include a plurality of projections 102e provided around outer circumference of divergent profile for strength and gripping purpose as shown in fig. 2b and 2c.
[0057] Fig. 4 illustrates snap lock mounting of the adapter inner component 102 with the adapter outer component 101. When the adapter outer component 101 is pushed against the positioned adapter inner component 102 through guided slot 104a and the hole 104, the plurality of integrally formed projections (or snaps) 202 of the adapter outer component 101 sits in the plurality of snaps 102d of the adapter inner component 102 to achieve snap lock mechanism between the adapter inner component 102 and the adapter outer component 101. The snap lock mechanism temporarily holds the assembly of the adapter inner component 102 and the adapter outer component 101 having the side body panel 105 in between till the lock nut is torqued.
[0058] In an aspect, the snap locks are made in the interface of around 0.3mm on the all areas to equally hold the assembly as per the vehicle orientation. The temporary hold of the assembly is very important as this avoids the orientation and falling of the assembly till the lock nut is torqued.
[0059] The lock nut 103 is provided with a plurality of threads on its inner circumference complementary to the plurality of threads 203 of the adapter outer component 101. The lock nut 103 is rotatably mounted on the adapter outer component 101 through mechanism of inner and outer threads and apply compressive rotational force on the adapter inner component 102 to sandwich the side body panel 105 in between the adapter inner component 102 and the adapter outer component 101.
[0060] Referring to fig. 5, the lock nut 103 may include a plurality of serrations portion 103a provided on upper surface 103b complementary to the plurality of serrations portion 102f provided on the bottom surface 102g of the adapter inner component 102. The number of portions of the plurality of serrations portion 103a is equal in number of portions of plurality of serrations portion 102f of the adapter inner component 102. For explanation, the number of serration portions has been shown four at equal angular distance of 90o from each other. However, the number of serration portions can be provided in any number at any angular distance complementary to number of serration portions on the adapter inner component.
[0061] The plurality of serrations portions 103a of the lock nut 103 mesh with the plurality of serrations portions 102f of the adapter inner component 102 and creates sound to indicate torque required by operator’s hand. As shown in fig. 1a, the lock nut 103 includes a plurality of projections provided at an angular distance around outer circumference for strength and gripping purpose.
[0062] As the adapter inner component 102 holds the adapter outer component 101 temporarily on the side body panel by maintaining the orientations for the next process that is to torque the lock nut 103 on the vehicle orientation, as the assembly area has a space constraint and operator is unable to see/check whether the lock nut 103 is torqued or not. So, for the operator confirmation about the torque, the plurality of serrations portions 103a on the lock nut 103 and the plurality of serrations portions 102f on the adapter inner component 102 are provided which provides confirmation to the operator in the form of a sound output. Moreover, the plurality of serrations portions 103a on the lock nut 103 and the plurality of serrations portions 102f on the adapter inner component 102 help in holding the fuel filling structure 100 together while eliminating the self-losing property of the lock nut 103.
[0063] Method of assembly: The configuration of the fuel filling system 100 in the contoured side body panel of the vehicle and its method of installation/assembly is as follows: The adapter inner component 102 is positioned at the hole 104 from inner side of the vehicle using the at least two protrusions 102c that guides the location. Once the adapter inner component 102 is positioned at the hole 104, the adapter outer component 101 is inserted into the hole 104 having the adapter inner component 102 positioned at inner surface of the hole 104. The adapter outer component 101 is inserted in such a way that the flange 201 rests against contoured side body panel 105 of the vehicle. The adapter outer component 101 is pushed in the positioned adapter inner component 102 such that the plurality of integrally formed projections 202 of the adapter outer component 101 sits in the plurality of slots 102d of the adapter inner panel 102 achieving a snap fit between each other and arresting the side body panel 105 in between the adapter inner component 102 and the adapter outer component 101. The lock nut 103 is placed/engaged against the adapter outer component 101 from inside the side body panel 105 of the vehicle and locked to the adapter outer component 101 by rotating in clockwise direction.
[0064] The lock nut 103 applies compressive rotational force on the adapter inner component 102 to sandwich the side body panel 105 in between the adapter inner component 102 and the adapter outer panel 101.
[0065] In order to determine whether further torque is required in the lock nut 103 or not as the assembly area has space constraint as it can be mounted at rear portion of the vehicle and the operator is unable to see or check whether lock nut is torqued or not, the plurality of serrations portions 103a provided on the outer surface of the lock nut 103 mesh with the plurality of serrations portions 102f provided on the outer bottom surface 102g of the adapter inner component 102 and create a sound output to indicate that no further torque is required.
[0066] The advantages of the present invention are given below.
• The present invention provides guiding features to facilitate smooth assembly of adapter components.
• The present invention provides temporary holding of the assembly of the adapter components to ensure the correct orientation of the adapter outer component inside the adapter inner component.
• The present invention provides locking features to provide confirmation of locking if the operator is unable to see/check whether the lock nut is torqued or not.

[0067] 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.”
[0068] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

Claims:

We claim:
1. A fuel filling structure (100) to mount counter box for fuel receptacle on contoured side body panel of a vehicle, the fuel filling structure (100) comprising:
an adapter outer component (101) defining a flange (201) inclined at a predetermined angle at one end to conform with the contoured surface of the side body panel (105) of the vehicle and a plurality of threads (203) provided on outer circumference at other end,
an adapter inner component (102) defining a flange (102a) complementary to the flange (201) of the adapter outer component (101); and
a lock nut (103) provided with a plurality of threads on its inner circumference complementary to the plurality of threads (203) of the adapter outer component (101), where the lock nut (103) rotatably mounted on the adapter outer component (101) and apply compressive rotational force on the adapter inner component (102) to sandwich the side body panel (105) in between the adapter inner component (102) and the adapter outer panel (101),
characterized in that
the adapter inner component (102) includes at least two protrusions (102c) provided around the guided slot profile (102b) and extending away from flat surface of the flange (102a) to position the adapter inner component (102) on a guiding slot (104a) of the hole (104) provided on the side body panel (105),
the adapter outer component (101) includes a plurality of integrally formed projections (202) at an equal angular distance on the outer circumference,
the adapter inner component (102) includes a plurality of snaps (102d) provided around inner circumference complementary to the plurality of integrally formed projections (204) of the adapter outer component (101) to achieve snap lock between the adapter inner component (102) and the adapter outer component (101),
the adapter outer component (101) includes a guiding protrusion portion (204) having a plurality of guiding ribs in longitudinal direction on outer surface (205), and
the adapter inner component (102) includes a guided slot profile (102b) complementary to the guiding protrusion portion (204).

2. The fuel filing structure (100) as claimed in claim 1, wherein a plurality of crushing ribs (206) is provided adjacent to the inner surface of the flange (201) on the outer circumference of the adapter outer component (101) to maintain clearance with the hole (104) of the side body outer panel (105) to control the gap with respect to the Rear Combination Lamp (RCL) of the vehicle and eliminate the positioning error.
3. The fuel filing structure (100) as claimed in claim 1, wherein the adapter inner component (102) includes a plurality of serrations portions (102f) provided at equal angular distance on bottom surface (102g) of the adapter inner component (102).
4. The fuel filing structure (100) as claimed in claim 3, wherein the lock nut (103) includes a plurality of serrations portions (103a) provided on upper surface (103b) complementary to the plurality of serrations portions (102f) provided on the bottom surface (102g) of the adapter inner component (102),
where the plurality of serrations portions (103a) of the lock nut (103) mesh with the plurality of serrations portions (102f) of the adapter inner component (102) and creates sound to indicate final torque.
5. The fuel filing structure (100) as claimed in claim 1, wherein the plurality of integrally formed projections (202) is provided in between the flange (201) and the plurality of threads (203).
6. The fuel filing structure (100) as claimed in claim 1, wherein one side of the adapter outer component (101) defines length (L1) and other side defines length (L2) where the length (L2) is more than the length (L1).
7. The fuel filing structure (100) as claimed in claim 1, wherein the adapter inner component (102) includes a plurality of projections (102e) provided around outer circumference for strength and gripping purpose.
8. The fuel filing structure (100) as claimed in claim 1, wherein the lock nut (103) includes a plurality of projections provided at an angular distance around outer circumference for strength and gripping purpose.
9. A method for assembling the fuel filling structure (100) on curved side body panel of a vehicle, the method comprising:
positioning, by a plurality of the at least two protrusions (102c), an adapter inner component (102) on a guiding slot (104a) of a hole (104) provided on the side body outer panel (105);
inserting, by a guiding portion, an adapter outer component (101), from outside the vehicle, in the hole (104) having the adapter inner component (102) at rear side of the side body outer panel (105);
holding, by means snap lock mechanism, the adapter outer component (101) housed inside the adapter inner component (102), upon insertion of the adapter outer component (101) into the adapter inner component (102) through the hole (104), the plurality of integrally formed projections (203) of the adapter outer component (101) sits in the plurality of slots (102d) of the adapter inner component (102) achieving a snap fit and holding the side body panel body (105) in between the flange (201) of the adapter outer component (101) and the flange (102a) of the adapter inner component (102);
engaging, a lock nut (103) with the adapter outer component (101), the lock nut (103) is placed against the adapter outer component (101) from inside the side body panel (105) of the vehicle and rotated clockwise/anticlockwise depending upon thread configuration to achieve locking between the lock nut (103) and the adapter outer component (101), the lock nut (103) in its locked condition comes in to contact with the adapter inner component (102) and applies a compressive force on the adapter inner component (102) to hold the side body panel (105).