The present disclosure described herein, in general, relates to a reinforcement structure attached on a bottom side of a vehicle body. In particular, the present disclosure relates to the reinforcement structure that is attached at a joining region, of a rear floor and a back panel, at an underbody of the vehicle.
BACKGROUND
[0002] Nowadays, in compressed natural gas, CNG, based vehicles, spare tire is placed vertically in a boot space provided at a rear side of a vehicle. Generally, the spare tire is placed vertically inside the frame adjoining to a CNG cylinder mounting frame and is clamped with the help of a belt. The holding of the said spare tire frame is generally provided on a rear floor.
[0003] In some cases, due to layout constraints, one of rear end connections of the spare tire frame can be bolted on a bracket that is spot welded on a back panel of the vehicle. In such cases or arrangements, during motion, loads are transferred from the spare tire frame to a joint between the rear floor and a back panel region via the bracket. Due to these, a part of vertical component load will act which may cause local bending in a region where the rear floor panel is spot welded with the back panel. Hence, there is a need of modifying that local region that may reduce the bending and increases the stiffness of the region on the rear floor panel.
[0004] But, the rear floor panel has certain restrictions while increasing its stiffness in the local region. Since, the rear floor panel being common for a number of similar designed vehicles, it is preferable not to make any

changes in the rear floor design due to economic reasons. Further, the rear floor panel also has an additional constraint for a new spot weld in the local region due to design constraint of the rear floor. Due to the mentioned constraints, there is a need for a new counter-measure to reduce deformation at the local bend region while overcoming the above mentioned challenges.
[0005] Some of the prior arts tried to overcome this problem but fails to do it efficiently.
[0006] It is therefore required to provide a solution that can reduce the bending that are observed at the region of the rear floor panel due to the connection of the spare tire frame with the back panel.
OBJECTS OF THE DISCLOSURE
[0007] Some of the objects of the present disclosure, which at least one for embodiment herein satisfy, are listed herein below.
[0008] It is a primary object of the present disclosure to provide a reinforcement structure that reduces the deformation in the bending region of a rear floor panel.
[0009] It is a general object of the present disclosure to provide the reinforcement structure that increases the stiffness of the bending region of the rear floor panel.
[0010] It is another object of the present disclosure to provide the reinforcement structure that improves the performance of the bending region of the rear floor panel under existing loads or to increase the strength to carry additional loads.
[0011] It is another object of the present disclosure to provide the reinforcement structure that increases the toughness and resistance of the bending region of the rear floor panel.

[0012] It is further another object of the present disclosure to provide the reinforcement structure that gives better performance and reliability.
[0013] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawing.
SUMMARY
[0014] This summary is provided to introduce concepts related to a reinforcement structure that is attached at joining region, of a rear floor and the back panel, provided at the underbody of the vehicle.
[0015] The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0016] In accordance with an embodiment, the present disclosure provides a reinforcement structure connecting an underbody rear floor and back panel of a vehicle. The reinforcement incudes a rectangular-shaped emboss formed at a left side having a hole at a centre; a triangular-shaped emboss in addition to a pentagon-shaped emboss formed at a right side having a triangular bead in between; and an inverted C-shaped flange connecting a first end of the rectangular-shaped emboss and a last end of the pentagon-shaped emboss.
[0017] In an aspect, the structure of the hole formed at centre of rectangular shaped emboss resembles oval shaped cut out.
[0018] In an aspect, the triangular-shaped emboss is formed above the pentagon-shaped emboss.

[0019] In an aspect, a spot weld is provided on the triangular shaped emboss.
[0020] In an aspect, the spot weld attaches the structure with the back panel.
[0021] In an aspect, a plurality of spot welds is provided on the pentagon shaped emboss.
[0022] In an aspect, the plurality of spot welds attaches the structure with the back panel.
[0023] In an aspect, a plurality of spot welds is provided on an extreme ends of the inverted C-shaped flange.
[0024] In an aspect, the plurality of spot welds attaches the structure with the rear floor panel.
[0025] In an aspect, the reinforcement structure is attached at the rear floor panel and the back panel joining region provided at the underbody of the vehicle..
[0026] In order to further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit the scope of the present subject matter.
[0027] Various objects, features, aspects, and advantages of the inventive present disclosure 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
[0028] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present disclosure and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures.
[0029] The illustrated embodiments of the present disclosure will be best 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 present disclosure as claimed herein, wherein:
[0030] FIG. 1 illustrates a rear end connection of a spare tire frame that is bolted on a bracket which is spot welded on a back panel of a vehicle in accordance with the present disclosure;
[0031] FIG. 2 illustrates a place where a reinforcement structure is positioned in accordance with the embodiment of the present disclosure;
[0032] FIG. 3 illustrates a configuration of the reinforcement structure in accordance with the embodiment of the present disclosure; and
[0033] FIG. 4 illustrates a connection between the underbody rear floor panel and the back panel through the reinforcement structure in accordance with the embodiment of the present disclosure.
[0034] The figures depict embodiments of the present disclosure 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 [0035] 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 spirit and scope of the present disclosure as defined by the appended claims.
[0036] 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.
[0037] 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.
[0038] 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.

[0039] 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.
[0040] FIG.1 illustrates a rear end connection of a spare tire frame 106 that is bolted on a bracket 108 which is spot welded on a back panel 104 of a vehicle 100 in accordance with an exemplary embodiment of the present disclosure. Due to this spare tire frame 106, loads are transferred through this joining region 110 that is spot welded between a rear floor panel 102 and the back panel 104 during vehicle running condition.
[0041] In order to overcome the bending induced in the joining region 110 between the rear floor panel 102 and the back panel 104 of the vehicle 100, a reinforcement bracket 200 is mounted at a position shown in FIG. 2. As shown in FIG. 3, a reinforcement bracket 200 connects an underbody rear floor panel 102 and the back panel 104 of the vehicle 100 on underside of the joinery region 110.
[0042] FIG. 3 depicts a configuration of the reinforcement structure 200 in accordance with an embodiment of the present disclosure. The reinforcement structure 200 includes, at a left side, a rectangular-shaped emboss 202 formed with a hole 202-C at its centre. The reinforcement structure 200 further includes a triangular-shaped emboss 204, in addition to a pentagon-shaped emboss 206 formed at a right side of the reinforcement structure 200. The triangular-shaped emboss 204 is formed above the pentagon-shaped emboss 206. In between the triangular-shaped emboss 204 and the pentagon-shaped emboss 206, a triangular shaped bead 208 is formed. The triangular shaped bead 208 increases

the stiffness of the reinforcement structure 200 and also reduces the bending at the joinery region 110.
[0043] Yet further, as shown in FIG.4, an inverted C-shaped flange 212 is also formed that connects a first end 202-F of the rectangular-shaped emboss 202 and a last end 206-L of the pentagon-shaped emboss 206. In an aspect, a set of spot welds 212-S1, 212-S2 is provided at the extreme ends of the inverted C-shaped flange, a spot weld 204-S is provided on the triangular-shaped emboss 204, and a set of spot welds 206-S1, 206-S2 is provided on the pentagon-shaped emboss 206. The triangular shaped bead 208 formed in between the triangular-shaped emboss 204 and the pentagon-shaped emboss 206 increases the strength of the reinforcement structure 200 and reduces bending at the joinery location 110.
[0044] Additionally, the connection between the underbody rear floor panel 102 and the back panel 104 through the reinforcement structure 200 is depicted through the FIG. 4 in accordance with an embodiment of the present disclosure. The hole 202-C that is formed on the centre of the rectangular-shaped emboss 202 incorporates the emboss 104-E1 formed on the back panel 104 of the vehicle 100. This hole 202-C helps in easy weld gun accessibility. In addition, the lower side 206-L of the pentagon-shaped emboss 206 that is in the form of inverted U-shape incorporates another emboss 104-E2 formed on the back panel 104 of the vehicle. Moreover, the set of spot welds 212- S1, 212-S2 formed on the extreme ends of the inverted C-shaped flange 212 are used for building up a rigid connection between the reinforcement structure 200 and the rear floor panel 102.
[0045] Furthermore, a spot weld 204-S formed on the triangular-shaped emboss 204 and a set of spot weld 206-S1, 206-S2 provided on the pentagon-shaped emboss 206, are used for building up a rigid connection between the reinforcement structure 200 and the back panel

104. In this manner, the bracket structure 200 is mounted at a connecting point between an underbody rear floor 102 and back panel 104 of a vehicle.
[0046] Thus, with the proposed reinforcement structure and the mounting of the same at the connection point between an underbody rear floor and back panel of a vehicle, as described in the present disclosure, various technical problems of the state of the art have been solved without deviating from the scope of the subject matter of the present disclosure.
TECHNICAL ADVANTAGES
[0047] The present disclosure provides a reinforcement structure that reduces the stress induced in the bending region of the rear floor panel.
[0048] The present disclosure provides the reinforcement structure that increases the stiffness of the bending region of the rear floor panel.
[0049] The present disclosure provides the reinforcement structure that improves the performance of the bending region of the rear floor panel under existing loads or to increase the strength to carry additional loads.
[0050] The present disclosure provides the reinforcement structure that increases the toughness and resistance of the bending region of the rear floor panel.
[0051] The present disclosure provides the reinforcement structure that gives better performance and reliability.
[0052] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawing.

Equivalents
[0053] Further, it will be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the invention and are included within its scope.
[0054] Furthermore, all examples recited herein are principally intended expressly to be only for pedagogical purposes to aid the reader in understanding the principles of the invention and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. Also, the various embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments.
[0055] 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.

WE CLAIM:

1. A reinforcement structure (200) connecting an underbody rear floor
panel (102) and a back panel (104) of a vehicle comprising:
a rectangular-shaped emboss (202) formed at a left side having a hole (202-C) at a center;
a triangular-shaped emboss (204) in addition to a pentagon-shaped emboss (206) formed at a right side having a triangular shaped bead (208) in between; and
an inverted C-shaped flange (212) connecting a first end (202-F) of the rectangular-shaped emboss (202) and a last end (206-L) of the pentagon-shaped emboss (206).
2. The reinforcement structure (200) as claimed in claim 1, wherein the triangular-shaped emboss (204) is formed above the pentagon-shaped emboss (206).
3. The reinforcement structure (200) as claimed in claim 1, wherein a rectangular- shaped bead (210) formed in between the rectangular-shaped emboss (202) and the triangular shaped emboss (204) along with the pentagon-shaped emboss (206).
4. The reinforcement structure (200) as claimed in claim 1, wherein a spot weld (204-S) is provided on the triangular shaped emboss (204).
5. The reinforcement structure (202) as claimed in claim 4, wherein the spot weld (204-S) attaches the structure (200) with the back panel (104).
6. The reinforcement structure (200) as claimed in claim 1, wherein a plurality of spot welds (206-S1, 206-S2) is provided on the pentagon shaped emboss (206).

7. The reinforcement structure (200) as claimed in claim 6, wherein the plurality of spot welds (206-S1, 206-S2) attaches the structure (200) with the back panel (208).
8. The reinforcement structure (200) as claimed in claim 1, wherein a plurality of spot welds (212-S1,212-S2) is provided on an extreme ends of the inverted C-shaped flange (212).
9. The reinforcement structure as claimed in claim 10, wherein the plurality of spot welds (212-S1, 212-S2) attach said the structure (200) above with the rear floor panel (102).
10. The reinforcement structure (200) as claimed in claim 1, wherein the reinforcement structure (200) is attached at the rear floor (102) and the back panel (104) joining region provided at the underbody of the vehicle.