[0001] The present disclosure, in general, relates to structure for spare tire carrier in a vehicle and, more particularly, to a structure for spare tire carrier in vertical direction, i.e., vehicle height direction.
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Generally, spare tires are mounted on underbody, specifically, rear under body of the vehicle. Further, cradles are provided to carry the spare tire. The cradles are mounted on the vehicle to carry the spare tire. To take out the spare tire from the vehicle, user needs unlocking the lock mechanism and take out the tire from the spare tire well or from the cradle.
[0004] Insertion and withdrawal of spare tire is cumbersome in CNG gas cylinder fitted vehicles or the vehicles which has small space at rear side of the vehicle. In the CNG gas cylinder fitted vehicles, the rear seat has to be folded to take out the spare tire positioned in the spare tire well at rear end of the vehicle. Therefore, there is requirement to change the orientation of carrying the spare tire in the vehicle. Fig. 1 describes rear structure 100 of a vehicle where CNG gas cylinder 104 is mounted on a gas cylinder holding frame 106. A spare tire carrier structure 103 is attached with the gas cylinder holding frame 106. The spare tire carrier structure 103 holds the spare tire from center hole through a bolt 102 that floats inside the nut of the spare tire carrier. The conventional design has several disadvantages. In the conventional design as shown in fig. 1, it is not possible to access spare tire bolt 102 or spare tire holder 102 as distance 'A' is less from the CNG cylinder rear and member tail end and vertical gap 'FT between the bolt 102 and the top surface of the member tail end is more.

[0005] Above mentioned technical problem can be solved by raising the spare tire in upward direction, raising the spare tire requires addition of reinforcement between the spare tire and the rear floor of the vehicle. Purpose of reinforcement is for resting the tire on reinforcement. Addition of reinforcement will increase weight of the overall vehicle which is not desired.
[0006] Another technical problem associated with the convention structure is that a high torque is required for tightening the bolt 102 to hold the spare tire.
[0007] Another technical problem with the existing vertical mounting structures is that the weight of the spare tire is directly transfer to the rear floor.
[0008] Accordingly, there is a need in the state of the art to provide a spare tire carrier structure that can be easily assembled on the vehicle frame. Further, the spare tire carrier structure that can solves the technical problem of removal and insertion of spare tire in the vehicle.
OBJECTS OF THE DISCLOSURE
[0009] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed hereinbelow.
[0010] The principal object of the present invention is to provide a spare tire carrier structure for carrying spare tire in vertical direction in vehicle.
[0011] Another object of the present invention is to provide a spare tire carrier structure that is easy to assemble at rear side of the vehicle during assembly of CNG gas cylinder holding structure.
[0012] Another object of the present invention is to provide a spare tire carrier structure having light weight and required stiffness.
[0013] Another object of the present invention is to provide a spare tire carrier structure that can allow easy insertion and removal of spare tire.
[0014] Another object of the present invention is to provide a spare tire carrier structure that can hold or carry spare tires of multiple sizes.

[0015] These and other objects and advantages will become more apparent when reference is made to the following description and accompanying drawings.
SUMMARY
[0016] This summary is provided to introduce concepts related to a spare tire carrier structure for carrying a spare tire in vertical direction in a vehicle. 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.
[0017] In an embodiment, the present disclosure relates to a spare tire carrier structure for carrying a spare tire in vehicle height direction (H). The spare tire carrier structure comprises a front cross frame member, a rear cross frame member, two longitudinal support frame members, and at least two longitudinal support members. The rear cross frame member is longitudinally spaced apart from the front cross member in vehicle length direction. The two longitudinal support frame members are transversally spaced apart from each other in vehicle width direction and coupled with the front cross member and the rear cross member at both ends, i.e., right hand side and left hand side to define a rectangular structure to receive the spare tire. Further, the at least two longitudinal support members are transversally spaced apart from each other and provided in between the front cross frame member and the rear cross frame member to receive bottom portion of the spare tire.
[0018] In an aspect, each of the at least two longitudinal support members define a flat base portion and an inclined portion extending in vertical direction at angle (P) from both ends of the flat base portion.
[0019] In an aspect, the front cross frame member and the rear cross frame member define an arcuate profile. The arcuate profile defines a straight portion, a bend portion extend in transverse direction at an angle (a) from left side end and right side end of the straight portion, and an end portion extend parallel to the

straight portion from end of the bend portion on left side and right side, wherein each of the end portions is coupled with the two longitudinal support frame members to define the rectangular structure.
[0020] In an aspect, the rear cross frame member has a locking structure to secure the spare tire.
[0021] In an aspect, the two longitudinal support frame members are rectangular hollow section pipes and the front and rear cross frame members are circular hollow section pipes.
[0022] In an aspect, a reinforcement bracket is provided in between the bend portion of the front cross frame member and the rear cross frame member and the two longitudinal support frame members to provide strength.
[0023] In an aspect, the spare tire carrier structure is hingedly connected with gas cylinder mounting frame at front side.
[0024] In an aspect, at least two longitudinal support members are hingedly connected with the front cross frame member and the rear cross frame member.
[0025] In an aspect, the locking structure comprises a body slidably mounted on the rear cross frame member at one end and a nut connected to the body at other end, the nut receives a screw that abut with rim of the spare tire.
[0026] In an aspect, each of the two longitudinal support frame members has a mounting bracket at rear side to mount the spare tire carrier structure with body of the vehicle.
[0027] 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
[0028] The illustrated embodiments of the subject matter 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 subject matter as claimed herein, wherein:
5 [0029] Fig. 1 illustrates spare tire carrier structure as existing;
[0030] Fig. 2 illustrates spare tire carrier structure, in accordance with an
embodiment of the present subject matter;
[0031] Fig. 3a and 3b illustrate another views of the spare tire carrier structure
of fig. 2;
10 [0032] Fig. 4a, 4b, and 4c illustrate top, side, and front view of the spare tire
carrier structure of fig. 2, in accordance with an embodiment of the present subject matter;
[0033] Fig. 5a, 5b, and 5c illustrate mechanism for locking the spare tire in the
spare tire carrier structure, in accordance with an embodiment of the present
15 subject matter;
[0034] Fig. 6 illustrates assembly of the spare tire carrier structure in the
vehicle, in accordance with an embodiment of the present subject matter.
[0035] 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
20 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
[0036] The detailed description of various exemplary embodiments of the
25 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
6

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.
[0037] It is also to be understood that various arrangements may be devised
5 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.
[0038] The terminology used herein is for the purpose of describing particular
10 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,
15 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.
[0039] 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,
20 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.
[0040] Unless otherwise defined, all terms (including technical and scientific
terms) used herein have the same meaning as commonly understood by one of
25 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.
7

[0041] These and other advantages of the present subject matter would be
described in greater detail with reference to the following figures. It should be
noted that the description merely illustrates the principles of the present subject
matter. It will thus be appreciated that those skilled in the art will be able to devise
5 various arrangements that, although not explicitly described herein, embody the
principles of the present subject matter and are included within its scope.
[0042] In the subsequent figures, for example, in fig. 2, arrow Y indicates
vehicle front direction, arrow X indicates vehicle transverse or vehicle width direction, and arrow Z indicates vehicle height direction.
10 [0043] As explained in above sections, major challenge in front of the experts
is to mount spare tire in vertical direction for easy insertion and removal.
[0044] Referring to fig. 2 that illustrates spare tire carrier structure 200 for
carrying spare tire 300 in vertical direction along vehicle height or in direction Z. The spare tire carrier structure 200 comprises a front cross frame member 201 and
15 a rear cross frame member 202 longitudinally spaced apart from the front cross
frame member 201 in vehicle length direction ‘Y’. The spare tire carrier structure 200 further comprises two longitudinal support frame members 203, 204, i.e., right side longitudinal support frame member 204 and left longitudinal support frame member 203 (hereinafter it can be referred as longitudinal support frame
20 members 203, 204) that are transversally spaced apart from each other in vehicle
width direction ‘X’. The front cross frame member 201 and the rear cross frame member 202 are coupled with the two longitudinal support frame members 203, 204 at both ends, i.e., right hand side and left hand side to define a closed structure, for example, rectangular structure to receive the spare tire 300. The two
25 longitudinal support frame members 203, 204 are transversally spaced apart from
each other in vehicle width direction ‘X’.
[0045] Further, the spare tire carrier structure 200 includes at least two
longitudinal support members 205, 206 that are transversally spaced apart from
each other and provided in between the front cross frame member 201 and the rear
30 cross frame member 202 to support lower portion of the spare tire 300. The at
8

least two longitudinal support members 205, 206 are hingedly connected with the
front cross frame member 201 and the rear cross frame member 202. With the
hinged connection, the at least two longitudinal support members 205, 206 can
fold towards center (where diagonal of rectangle meet) of the rectangular structure
5 formed by the first cross frame member 201 and the rear cross frame member 202
during assembly of the spare tire carrier structure 200 from rear door of the
vehicle. The first longitudinal support member 205 has a hinged bracket 205x at
connection with the front cross frame member 201 and the rear cross frame
member 202. Similarly, the second longitudinal support member 206 has a hinged
10 bracket 206x at connection with the front cross frame member 201 and the rear
cross frame member 202.
[0046] As shown in fig. 2, reinforcement brackets 212 are provided in
between the bend portions 201b (mentioned in fig. 4a) of the front cross frame
member 201 and the longitudinal support frame members 203,204. Similarly,
15 reinforcement brackets 212 are provided in between the bend portions 202b
(mentioned in fig. 4a) of the rear cross frame member 202 and the longitudinal support frame members 203,204. The reinforcement bracket 212 provides strength to the structure.
[0047] As shown in fig. 2, 3a, 3b, the spare tire carrier structure 200 is
20 connected with a gas cylinder holding structure 400 at front end and can be
mounted on the vehicle rear body at rear end. In one implementation, the two
longitudinal support frame members 203, 204 has hinged mounting brackets 210,
211 that attach with the gas cylinder holding structure 400 to provide a hinged
connection. Therefore, the spare tire carrier structure 200 can be hingedly
25 connected with the gas cylinder holding structure 400 at front end. At rear end, the
two longitudinal support frame members 203, 204 has mounting brackets 208, 209 to mount the spare tire carrier structure 200 with body of the vehicle by means of bolting.
[0048] In another implementation, the two longitudinal support frame
30 members 203, 204 has mounting brackets that fixedly mounts the spare tire carrier
9

structure 200 with the gas cylinder holding structure 400 at front end and has mounting brackets at rear end to mount the spare tire carrier structure 200 with the body of the vehicle.
[0049] As shown in fig. 2, 3a, and 3b, the spare tire carrier structure 200 has a
5 locking structure 207 to hold the spare tire 300 during running of the vehicle and
to arrest any motion in the spare tire 300. The locking structure 207 is slidably mounted on the rear cross frame member 202 and has easy access from rear end of the vehicle to insert and remove the spare tire 300 from spare tire carrier structure 200.
10 [0050] Referring to fig 4a, the front cross frame member 201 and the rear
cross frame member 202 are of same shape and configuration. The front cross frame member 201 defines an arcuate profile having a straight portion 201a and a bend portion 201b that extend in transverse direction ‘X’ at an angle ‘α’ from left side end and right side end of the straight portion 201a. Further, an end portion
15 201c extend parallel to the straight portion 201a from end of the bend portion
201b on the left side and the right side. The end portion 201c on both sides coupled with the two longitudinal support frame members 203, 204.
[0051] Similarly, the rear cross frame member 202 defines an arcuate profile
having a straight portion 202a and a bend portion 202b that extend in transverse
20 direction ‘X’ at an angle ‘α’ from left side end and right side end of the straight
portion 202a. Further, an end portion 202c extend parallel to the straight portion 202a from end of the bend portion 202b on left side and right side. The end portion 202c on both side is coupled with the two longitudinal support frame members 203, 204. The angle ‘α’ is defined by taking into consideration the
25 position of smallest tire above the floor (to maintain sufficient clearance) and
secondly minimizing the vertical distance between different sizes of tire.
[0052] The front cross frame member 201 and the rear cross frame member
202 coupled with the two longitudinal support frame members 203, 204 to define
the rectangular structure where longitudinal distance ‘W1’ between the end
30 portions 201c, 202c is less than longitudinal distance ‘W2’ along centre line AA
10

of the spare tire carrier structure 200. With the bend portions 201b, 202b that
depends on the angle of bend at both left hand side and right hand side, the spare
tire carrier structure 200 facilitate variable longitudinal distance to receive spare
tire of multiple sizes. The longitudinal distance ‘W2’ is always bigger than the
5 variable distance between the bend portions 202b, 201b.
[0053] Referring to fig. 4a, i.e., top view of the spare tire carrier structure 200,
both the two longitudinal support frame members 203, 204 are spaced apart from
each other by a distance ‘L1’. Further, the distance between the two longitudinal
support frame members 203, 204 depends on diameter of the spare tire 300. The
10 front cross frame member 201 and the rear cross frame member 202 are spaced
apart from each other by a longitudinal distance ‘W1’ on the two longitudinal support members 203, 204. Again the longitudinal distance ‘W1’ depends on width of the spare tire 300.
[0054] Referring fig. 4b, both the two longitudinal support members 205, 206
15 are same in shape and configuration. The longitudinal support member 205
defines a flat base portion 205a having a length ‘S’ in longitudinal direction ‘Y’
and an inclined portion 205b, 205c extending in vertical upward direction ‘Z’ at
angle ‘β’ from both ends of the flat base portion 205a. The angle ‘β’ is defined
such that there is always contact between spare tire (of different sizes) and
20 inclined portions 205b and 205c.
[0055] Similarly, not shown in figure, the longitudinal support member 206
defines a flat base portion 206a having a length ‘S’ in longitudinal direction ‘Y’
and an inclined portion 206b, 206c extending in vertical upward direction ‘Z’ at
angle ‘β’ from both ends of the flat base portion 206a. The angle ‘β’ is defined
25 such that there is always contact between spare tire (of different sizes) and
inclined portions 206b and 206c
[0056] As shown in fig. 4a, 4b, and 4c, the spare tire carrier structure 200 can
carry spare tire 300 of multiple sizes. Fig. 4c shows that the spare tire carrier
structure 200 can carry spare tires 300a, 300b, 300c, 300d with varying diameter
30 and varying width. Further, angle ‘α’ and the angle ‘β’ provides single spare tire
11

carrier structure 200 to carry the spare tires of different sizes in a single structure upto certain limit. To accommodate spare tire of altogether different sizes, another carrier structure can be made by changing distance L1, W1, and S, accordingly setting angle ‘α’ and the angle ‘β’.
5 [0057] Referring to fig. 4a, the spare tire 300 of different sizes primarily
touches the bend portions 201b, 202b at point 213. As shown, the spare tire 300d has small diameter and small width that can touch the extreme points on the bend portions 201b, 202b as compared to the spare tire 300a having big diameter and big width as compared to the spare tire 300d. Referring to fig. 4b, the spare tire of
10 different sizes secondarily touches the inclined portion 205b, 206b, 205c, 206c at
point 214. Therefore, the spare tire 300 of different sizes are completely arrest in the spare tire carrier structure 200 along diameter and width. The at least two longitudinal support members 205, 206 arrest the spare tire 300 in vertical direction so that during braking there is no movement in the spare tire. Fig. 4c
15 illustrates positioning of the spare tires of different sizes in the single spare tire
carrier structure 200.
[0058] Referring to fig. 2, 3a, 3b and fig. 5a and 5b together, the locking structure 207 has a body 207a that is slidably mounted on the rear cross frame member 202 at one end and a nut 207b connected by means of welding to the
20 body 207a at other end. The nut 207b receives a screw 207c that abut with rim of
the spare tire 300. The body 207a is pivotally mounted on the rear cross frame member 202 so that it can rotate in forward direction toward vehicle front and rearward direction toward vehicle rear. A locking portion 202d mounted on the rear cross frame member 202 and a corresponding slot 207d is provided on the
25 body 207a. The slot 207d of the body 207a is engaged to lock the lock structure
207 in forward direction. Further, the body 207a may have a spring that keeps the locking structure 207 in rearward direction when the lock portion 202d and the slot 207d are not engaged. During insertion of the spare tire 300 in the spare tire carrier structure 200, the locking structure 207 is in rearward direction. After
30 insertion of the spare tire 300, the locking structure 207 is pushed towards the
12

lock portion 202d for engagement with the slot 207d. After engagement, the screw
207c is tighten by hand to abut with the rim of the spare tire 300 to arrest any
upward movement. To remove the spare tire 300 or to pull out the spare tire 300
from the spare tire carrier structure 200, screw 207c is untightened and the lock
5 structure 207 is slided in Right hand side transverse direction to dis-engage the
engagement of the lock portion 202d and the slot 207d.
[0059] In another implementation, the spare tire 300 can be secured using a
strap lapping over the spare tire and using a ratchet mechanism step can be further
tighten to arrest movements of the spare tire in the spare tire carrier structure 200
10 as shown in fig. 5c.
[0060] As explained in the fig. 2, the spare tire carrier structure 200 is
hingedly connected to the gas cylinder holding structure 400 at front end. With the hinged type connection, the spare tire carrier structure 200 can be sub-assembled along with the gas cylinder holding structure 400 while assembly from rear
15 doorcutline. As shown in arrangement 800 of fig. 6, the gas cylinder holding
structure with gas cylinder 803 and the spare tire carrier structure 804 is provided on the assembly jig 801 and enters through the rear door cutline 802. During assembly, the spare tire carrier structure 804 is folded along the hinged portion toward vehicle upward direction as indicated by arrow 805 to avoid any
20 interference. After placing the gas cylinder holding structure with gas cylinder
803 at rear end of the vehicle, the spare tire carrier structure 804 is moved in direction parallel to gas cylinder holding structure as indicated by arrow 806. After assembly, the spare tire carrier structure 804 placed parallel to the rear floor of the vehicle.
25 [0061] In an embodiment, the spare tire carrier structure 200 is made of steel
metal. The front cross frame member 201 and a rear cross frame member 202 are made of circular hollow section pipes. Similarly, the at least two longitudinal support members 205, 206 are made of circular hollow section pipes. The two longitudinal support frame members 203, 204 are made of rectangular hollow
30 section pipes.
13

[0062] In an embodiment, the multiple spare tire sizes can be placed in one
spare tire carrier structure. Further, dimensions, such as L1, W1, and S can be varied to cover different ranges of tires.
[0063] In an embodiment, the spare tire carrier structure 200 can be mounted
5 by means of bolts to the gas cylinder holding structure.
[0064] Technical advantages of the present spare tire carrier structure:
[0065] The structure is self-centering, no effort required for aligning the tire
before locking.
[0066] The structure is self-supported for preventing tire falling once the tire
10 is mounted inside the Spare tire Carrier. No temporary holding is required for
initial holding of tire.
[0067] The spare tire can be easily inserted and removed by hand.
[0068] There is no touching between vertical tire and Rear Floor. So
strengthening of Rear floor is not required as there is no load transferred from tire
15 to Rear Floor.
[0069] 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
20 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
25 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
14

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,
5 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
10 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.).
15 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,
20 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
25 possibilities of “A” or “B” or “A and B.”
[0070] 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,
30 versions or examples, which are included to enable a person having ordinary skill
15

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:

A spare tire carrier structure (200) for carrying a spare tire (300) in vehicle height direction (H), the spare tire carrier structure (200) comprising:
a front cross frame member (201);
a rear cross frame member (202) longitudinally spaced apart from the front cross frame member (201) in vehicle length direction (Y);
two longitudinal support frame members (203, 204) are transversally spaced apart from each other in vehicle width direction, where the front cross member (201) and the rear cross member (202) are coupled with the two longitudinal support frame members (203, 204) at both ends to define a closed structure; and
at least two longitudinal support members (205, 206) are transversally spaced apart from each other and provided in between the front cross frame member (201) and the rear cross frame member (202).
The spare tire carrier structure (200) as claimed in claim 1, wherein each of the at least two longitudinal support members (205, 206) define a flat base portion (205a) and an inclined portion (205b, 205c) extending in vertical direction at angle (P) from both ends of the flat base portion (205a).
The spare tire carrier structure (200) as claimed in claim 1, wherein the front cross frame member (201) and the rear cross frame member (202) define an arcuate profile where the arcuate profile defines:
a straight portion (201a, 202a);
a bend portion (201b, 202b) extend in transverse direction at an angle (a) from left side end and right side end of the straight portion (201a, 202a); and
an end portion (201c, 202c) extend parallel to the straight portion (201a, 202a) from end of the bend portion (201b, 202b) on left side and

right side, wherein each of the end portions (201c, 202c) is coupled with the two longitudinal support frame members (203, 204) to define the closed structure.
The spare tire carrier structure (200) as claimed in claim 3, wherein the front cross frame member (201) and the rear cross frame member (202) define a variable longitudinal distance between the bend portion (201b) and the bend portion (202b).
The spare tire carrier structure (200) as claimed in claim 1, wherein the rear cross frame member (202) has a locking structure (207) to secure the spare tire (300).
The spare tire carrier structure (200) as claimed in claim 5, wherein the locking structure (207) comprises a body (207a) slidably mounted on the rear cross frame member (202) at one end and a nut (207b) connected to the body (207a) at other end, the nut (207b) receives a screw (207c) that abut with rim of the spare tire (300).
The spare tire carrier structure (200) as claimed in claim 1, wherein the two longitudinal support frame members (203, 204) are rectangular hollow section pipes.
The spare tire carrier structure (200) as claimed in claim 1, wherein a reinforcement bracket (212) is provided in between the bend portion (201b, 202b) of the front cross frame member (201) and the rear cross frame member (202) and the two longitudinal support frame members.
The spare tire carrier structure (200) as claimed in claim 1, wherein the spare tire carrier structure (200) is hingedly connected with gas cylinder mounting frame (400) at front side.
The spare tire carrier structure (200) as claimed in claim 1, wherein at least two longitudinal support members (205, 206) are hingedly connected with the front cross frame member (201) and the rear cross frame member (202).

The spare tire carrier structure (200) as claimed in claim 1, wherein each of the two longitudinal support frame members (203, 204) has a mounting bracket (208, 209) at rear side to mount the spare tire carrier structure (200) with body of the vehicle.