TECHNICAL FIELD

[001] This disclosure relates generally to a body of a road vehicle, more particularly to a semi-monocoque body for a road vehicle.

BACKGROUND

[002] A gross weight of the road vehicle is an important factor in the output mileage and performance of the road vehicle, as well as in its manufacturing and material cost. A lower gross weight is preferred especially in electric vehicles in order to achieve the best performance. As will be appreciated by those skilled in the art, the chassis, the driver cabin, and the loader body structure may account for major portion of the gross weight of the road vehicle. So, in order to reduce the gross weight, either structural configuration may be changed, or lighter material may be chosen. Typically, the material used in the manufacturing of monocoque structure of the road vehicle is Steel, and the joining process used to make the structure of the vehicle is welding.

[003] However, welding creates a heat affected zone at the welded region which reduces the strength of the material that even after treatment is not restored to its previous strength. Further, welding is a time-consuming and laborious process. Furthermore, the fixtures used are usually bulky, expensive, and wear over time. Moreover, costs associated with welding are higher, as it involves equipment cost and fixture cost, along with safety cost. Once the structure is manufactured using welding, the structure also requires painting to prevent it from corrosion. This further adds to the cost, as painting required setting up of a paint shop which also requires licensing and compliance with standards.

[004] Further, currently monocoque structures are used in the design of the road vehicle body. In such monocoque structures, its inner structure relies on the outer skin to distribute the stress and load throughout the structure so as to keep it rigid. As such, the monocoque structure may not effectively distribute the stress and load throughout the structure, thereby making the structure overall weak.

[005] Therefore, an improved structure of the body of the road vehicle is desired that affords sufficient strength and rigidity, is low cost, can be manufactured/assembled easily and efficiently, and also provides for easy and quick repair and replacement of the defected/worn parts.

SUMMARY

[006] In one embodiment, a semi-monocoque body of a road vehicle is disclosed. The semi-monocoque body may include a plurality of lateral members. Each of the plurality of lateral members may define an inverted U-shape in a lateral plane. Further, each of the plurality of lateral members may include a left leg member and a right leg member. The left leg member and the right leg member of each of the plurality of lateral members may include at least one C-shaped rail. The plurality of lateral members may be distributed along a length of the semi-monocoque body. Each adjacent pair of lateral members of the plurality of lateral members are separated by a minimum predefined distance. Further, each of the plurality of lateral members may define a cut-out. The semi-monocoque body may further include a plurality of stringer members. Each the plurality of stringer members may be positioned along a length of the semi-monocoque body and substantially perpendicular to the plurality of lateral members. Each the plurality of stringer members may be engaged with an associated lateral member of the plurality of lateral members via the cut-out defined by the associated lateral member. The plurality of lateral members along with the plurality of stringer members define a frame of the semi-monocoque body. Each of the plurality of stringer members may include at least one L-shaped rail. The semi- monocoque body may further include a skin member attached to the frame defined by the plurality of lateral members and the plurality of stringer members, via a plurality of attachments couplings. [007] In another embodiment, a road vehicle implementing a semi- monocoque body is disclosed. The road vehicle may include a semi-monocoque body that may include a plurality of lateral members. Each of the plurality of lateral members may define an inverted U-shape in a lateral plane. Further, each of the plurality of lateral members may include a left leg member and a right leg member. The left leg member and the right leg member of each of the plurality of lateral members may include at least one C-shaped rail. The plurality of lateral members may be distributed along a length of the semi-monocoque body. Each adjacent pair of lateral members of the plurality of lateral members are separated by a minimum predefined distance. Further, each of the plurality of lateral members may define a cut-out. The semi-monocoque body may further include a plurality of stringer members. Each the plurality of stringer members may be positioned along a length of the semi-monocoque body and substantially perpendicular to the plurality of lateral members. Each the plurality of stringer members may be engaged with an associated lateral member of the plurality of lateral members via the cut-out defined by the associated lateral member. The plurality of lateral members along with the plurality of stringer members define a frame of the semi-monocoque body. Each of the plurality of stringer members may include at least one L-shaped rail. The semi- monocoque body may further include a skin member attached to the frame defined by the plurality of lateral members and the plurality of stringer members, via a plurality of attachments couplings.

[008] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[009] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, explain the disclosed principles. [010] FIGs. 1A-1B illustrate an exploded view and an assembled perspective view, respectively of a semi-monocoque body of a road vehicle, in accordance with some embodiments of the present disclosure.

[Oil] FIGs. 1C-1D illustrate a side view and a front view, respectively of a frame of the semi-monocoque body, in accordance with some embodiments.

[012] FIGs. 2A-2B illustrate a perspective view and a side view, respectively of a C-shaped rail, in accordance with an embodiment.

[013] FIGs. 2C-2D illustrate a perspective view and a side view, respectively of a C-shaped rail, in accordance with another embodiment.

[014] FIGs. 3A-3B illustrate a perspective view and a side view, respectively of a L-shaped rail, in accordance with some embodiments.

[015] FIGs. 4A-4B illustrate a perspective view and a side view, respectively of a modified-C-shaped rail, in accordance with some embodiments.

[016] FIG. 5 illustrates a perspective view of an assembly of the C-shaped rail and the L-shaped rail, in accordance with some embodiments.

[017] FIGs. 6A-6I illustrate perspective views of various different shear clips, in accordance with some embodiments.

[018] FIGs. 7A-7B are snapshots of the semi-monocoque body of the road vehicle, in accordance with some embodiments.

[019] FIG. 8A-8B illustrate a top view of the frame and a magnified view of a section (A) of the frame, respectively, in accordance with some embodiments.

DETAILED DESCRIPTION

[020] Exemplary embodiments are described with reference to the accompanying drawings. Wherever convenient, the same reference numbers are used throughout the drawings to refer to the same or like parts. While examples and features of disclosed principles are described herein, modifications, adaptations, and other implementations are possible without departing from the spirit and scope of the disclosed embodiments. It is intended that the following detailed description be considered as exemplary only, with the true scope and spirit being indicated by the following claims. Additional illustrative embodiments are listed below.

[021] The present disclosure provides for a semi monocoque structure for the body of the road vehicle. This semi monocoque structure uses its shell to distribute stresses and loads across the surface, rather than relying on the skin. Further, the semi monocoque structure is constructed using Aluminum, in particularly, Al 6082 T6, which allows to keep the structure light weight. The use of Aluminum also makes this structure impervious to corrosion and does away with the requirement of painting, thereby reducing the overall cost of manufacturing. Furthermore, the light-weight structure helps in attaining better performance and mileage of the road vehicle. For joining, fasteners, and in particularly rivets are used throughout the structure. The use of rivets increases the flexibility in design and increases the repairability of structure, thereby making the design modular. For example, in case of component failure, the component can be replaced simply by opening the rivets.

[022] The semi monocoque structure is designed as a cage-like structure which includes different components like stringer members, cut-outs (mouse holes), and multiple load path distribution. A stringer member is a structural member that is used to stiffen the skin with the rest of the structure and further distribute the load. In the present semi monocoque structure, the stringer members are installed throughout the length on all face i.e. sides, roof, and floor. By providing the stringer members across the length, multiple load paths are introduced which avoids concentration of stress at a single point and further helps in better distribution of the stress over the stringer member. In order to let the stringer members run across the length, cut-outs (mouse holes) are provided on cross members (also, referred to as lateral members in this disclosure) of each side, the floor, and the roof. Further, shear clips are used in the structure that act as a junction connector of cross members and the stringer members.

[023] The semi monocoque structure uses C-channel rails (also, referred to as C-shaped rails). The C-shaped rails carry major part of the load of the semi monocoque structure. The C-shaped rails offer high bending and load bearing capabilities. A sheet thickness of the C-shaped rails throughout may be kept as 2.5 millimeters (mm). So, in order to achieve higher load capacity of the C-shaped rails, thickness of its web and flange may be increased. For example, variation in the thickness of the different members can be achieved by placing a C-shaped rail within another C-shaped rail (i.e. C in C configuration). This allows to vary the inertia of the component in accordance with the momentum that will act while loading.

[024] The use of Aluminium (Al 6082 T6) for the material of the semi monocoque body allows for a lightweight design with better load capacity. The Aluminum structure provides optimum strength to weight ratio (better than the steel and iron used in the conventional industry). Further, the use of Aluminum makes the design corrosion resistant which further eliminates the requirement of paint on the structure, thereby helping in cost cutting.

[025] Further, the fasteners -based attachment of the various components allows for easy and quick serviceability and replaceability of damaged components. The reparability of the structure on damage is an advantage, since the structure is built to withstand high loads, and therefore, riveted structure can be easily dealt with. Moreover, this provides for a modular design which is easy to assemble and disassemble.

[026] Referring to FIGs. 1A-1B, an exploded view and an assembled perspective view, respectively of a semi-monocoque body 100 of a road vehicle are illustrated, in accordance with some embodiments of the present disclosure. In some embodiments, the semi-monocoque body 100 may include a plurality of lateral members 102. For example, as shown in FIGs. 1A-1B, the semi-monocoque body 100 may include five lateral members 102. Each of the plurality of lateral members 102 may define an inverted U-shape in a lateral plane (P). In other words, the each of the plurality of lateral members 102 may be defined in one lateral plane (P), such that the lateral plane (P) is lateral to the length of the semi-monocoque body 100. [027] Each of the plurality of lateral members 102 may include a left leg member 104L and a right leg member 104R. As show in FIGs. 1A-1B, each of the left leg member 104L and the right leg member 104R may be positioned substantially vertically. In some embodiments, each of the left leg member 104L and the right leg member 104R of each of the plurality of lateral members 102 may include at least one C-shaped rail. Further, in some embodiments, each of the left leg member 104L and the right leg member 104R may include at least two C-shaped rails. In such embodiments, the at least two C-shaped rails may be positioned one within the other of the at least two C-shaped rails. In an example embodiment, a sheet thickness of each of the at least one C-shaped rail may be 2.5 millimetres (mm). The C-shaped rail is further explained in conjunction with FIGs. 2A-2D.

[028] As will be understood, the plurality of lateral members 102 may be distributed along the length of the semi-monocoque body 100. For example, each adjacent pair of lateral members 102 (of the plurality of lateral members 102) may be separated by a same distance from each other. However, the adjacent pairs of lateral members 102 may not be necessarily separated by the same distance from each other, and may be separated by different distances depending on the overall design of the semi-monocoque body 100. However, it should be noted that each adjacent pair of lateral members (of the plurality of lateral members 102) may be separated by a minimum predefined distance.

[029] In some embodiments, each of the plurality of lateral members 102 may define at least one cut-out 204. Each of the plurality of lateral members 102 may define multiple cut-outs 204, depending on the requirement. The cut-out 204 is further explained in detail in conjunction with FIG. 2A.

[030] In some embodiments, each of the plurality of lateral members 102 may further include a top horizontal member 104T (i.e. along the roof of the semi- monocoque body 100). Further, the left leg member 104L and the right leg member 104R may be attached to the top horizontal member 104T via a left end and a right end, respectively of the top horizontal member 104T. In some embodiments, the left leg member 104L and the right leg member 104R may be attached to the top horizontal member 104T via at least one fastener. The at least one fastener may be a nut-bolt assembly, a screw, or a rivet.

[031] Each of the plurality of lateral members 102 may further include a bottom horizontal member 104B (i.e. along the floor of the semi-monocoque body 100). The left leg member 104L and the right leg member 104R may be attached to the bottom horizontal member 104B via a left end and a right end, respectively, of the bottom horizontal member 104B and a bottom end of the left leg member 104L and the right leg member 104R.

[032] It should be noted that each of the plurality of lateral members 102 may be assembled before attaching the plurality of lateral members 102 to the rest of the semi-monocoque body 100. Alternately, first the bottom horizontal member 104B may be attached to the floor, then the left leg member 104L and the right leg member 104R may be attached to the bottom horizontal member 104B, and then the top horizontal member 104T may be attached to the left leg member 104L and the right leg member 104Rto thereby define the lateral member 102.

[033] In some embodiments, each of the top horizontal member 104T and the bottom horizontal member 104B may include at least one C-shaped rail (the C- shaped rail is explained in the subsequent sections of this disclosure). Further, in some embodiments, the top horizontal member 104T and the bottom horizontal member 104B may include at least two C-shaped rails. In such embodiments, the at least two C-shaped rails may be positioned one within the other of the at least two C- shaped rails. In an example embodiment, a sheet thickness of each of the at least one C-shaped rail may be 2.5 mm.

[034] In some embodiments, each of the plurality of lateral members 102 may further include a top-left member 104TL. The top-left member 104TL may be configured to be attached to the left leg member 104L and the top horizontal member 104T via a first end and a second end, respectively of the top-left member 104TL. Similar to the top-left member 104TL, each of the plurality of lateral members 102 may further include a top-right member 104TR. The top-right member 104TR may be attached to the right leg member 104R and the top horizontal member 104T via a first end and a second end, respectively of the top-right member 104TR.

[035] In some embodiments, the top-left member 104 TL may be attached to the left leg member 104L and the top horizontal member 104T via at least one fastener. Similarly, the the top-right member 104TR may be attached to the right leg member 104R and the top horizontal member 104T via at least one fastener. By way of an example, the at least one fastener may be a nut-bolt assembly, a screw, or a rivet.

[036] In some embodiments, the top-left member 104TL and the top-right member 104TR may include at least one C-shaped rail (the C-shaped rail is explained in the subsequent sections of this disclosure). Further, in some embodiments, the topleft member 104TL and the top-right member 104TR may include at least two C- shaped rails. In such embodiments, the at least two C-shaped rails may be positioned one within the other of the at least two C-shaped rails. In an example embodiment, a sheet thickness of each of the at least one C-shaped rail may be 2.5 mm.

[037] The semi-monocoque body 100 may further include a plurality of stringer members 106. For example, as shown in FIGs. 1A-1B, the semi-monocoque body 100 may include twelve stringer members 106, i.e. three stringer members 106 along the roof, two stringer members 106 along each side, and three stringer members 106 along the floor of the semi-monocoque body 100. Each the plurality of stringer members 106 may be positioned along the length of the semi-monocoque body 100 and substantially perpendicular to the plurality of lateral members 102. As scuch, each of the plurality of stringer members 106 may be positioned substantially horizontally.

[038] Further, each the plurality of stringer members 106 may be configured to engage with an associated lateral member of the plurality of lateral members 102. In some embodiments, each the plurality of stringer members 106 may be configured to engage with the associated lateral member 102 via the cut-out 204 defined by the associated lateral member 102. In some embodiments, each the plurality of stringer members 106 may be coupled with the plurality of lateral members 102. In particularly, each the plurality of stringer members 106 may be coupled with the plurality of lateral members 102 via a shear clip.

[039] It should be noted that, in some embodiments, each of the plurality of stringer members 106 may include at least one L-shaped rail. Further, in some embodiments, each of the plurality of stringer members 106 may include at least two L-shaped rails. In such embodiments, the at least two L-shaped rails may be positioned one within the other of the at least two L-shaped rails. In some embodiments, a sheet thickness of each of the at least one L-shaped rail may be 2.5 mm. The L-shaped rail is further explained in conjunction with FIGs. 3A-3B.

[040] As such, the plurality of lateral members 102 along with the plurality of stringer members 106 may define a frame 101 of the semi-monocoque body 100. Referring now to FIGs. 1C-1D, a side view and a front view, respectively of the frame 101 of the semi-monocoque body 100 are illustrated, in accordance with some embodiments of the present disclosure. As shown in FIGs. 1C-1D, the frame 101 of the semi-monocoque body 100 may include the plurality of lateral members 102 and the plurality of stringer members 106.

[041] The semi-monocoque body 100 may further include at least one skin member 108 attached to the frame 101 defined by the plurality of lateral members 102 and the plurality of stringer members 106. For example, as shown in FIGs. 1A- 1B, the semi-monocoque body 100 may include four skin members 108 including a floor skin member 108A, a left side skin member 108B, a right side skin member 108C, and a roof skin member 108D. As will be appreciated by those skilled in the art, the skin members 108 (hereinafter, the floor skin member 108 A, the left side skin member 108B, the right side skin member 108C, and the roof skin member 108D may also be collectively referred to as skin members 108) may include a sheet made of metal, an alloy, a polymer, or a composite material. Further, it should be noted that multiple sheets may be used to define each of the floor skin member 108A, the left side skin member 108B, the right side skin member 108C, and the roof skin member 108D.

[042] In some embodiments, each of the at least one skin member 108 may be attached to the frame 101 via a plurality of attachments couplings. The attachments couplings are further explained in conjunction with FIGs. 7A-7B and 8A-8B.

[043] In some embodiments, as shown in FIGs. 1A-1D, the semi-monocoque body 100 may further include a front face 110A and a back face HOB. It should be noted that, in some embodiments, each of the front face 110A and the back face 110B may be same as a lateral member 102, and may therefore include the left leg member 104L, the right leg member 104R, the top horizontal member 104T, the bottom horizontal member 104B, the top-left member 104TL, and the top-right member 104TR, each including at least one C-shaped rail, as described above. However, in alternate embodiments, each of the front face 110A and the back face HOB may differ from the construction of the lateral member 102. For example, in such (alternate) embodiments, the left leg member 104L, the right leg member 104R, the top horizontal member 104T, the bottom horizontal member 104B, the top-left member 104TL, and the top-right member 104TR (associated with the front face 110A and the back face HOB) may include a modified-C-shaped rail. The modified- C-shaped rail is described in detail in conjunction with FIGs. 4A-4B.

[044] Referring now to FIGs. 2A-2B, a perspective view and a side view, respectively, of a C-shaped rail 200A are illustrated, in accordance with some embodiments. As shown, the C-shaped rail 200A may include a plurality of holes 202 to allow the C-shaped rail 200A to be coupled to other C-shaped rails or to L-shaped rails, or any other part of a structure of the semi-monocoque body 100. For example, the C-shaped rail 200A may be associated with the left leg member 104L, the right leg member 104R, the top horizontal member 104T, or the bottom horizontal member 104B of each of the each of the plurality of lateral members 102. [045] Further, as shown in FIGs. 2A-2B, the C-shaped rail 200A may further include one or more cut-outs 204. Each of these one or more cut-outs 204 may be configured to allow a L-shaped rail of stringer member 106 to be engaged with the C- shaped rail 200A of an associated lateral member 102. As can be seen, each of the one or more cut-outs 204 may be substantially V-shaped to allow the L-shaped rail to engage and couple with the C-shaped rail 200A. This design of the cut-outs 204, i.e. the substantially V-shaped design, allows for a maximum strength of the C-shaped rail 200A while allowing for engaging of the C-shaped rail 200A with the L-shaped rail.

[046] Referring now to FIGs. 2C-2D, a perspective view and a side view, respectively of a C-shaped rail 200C are illustrated, in accordance with some embodiments. As shown, the C-shaped rail 200C may include a plurality of holes 202 to allow the C-shaped rail 200C to be coupled to other C-shaped rails or to L-shaped rails, or any other part of a structure of the semi-monocoque body 100. For example, the C-shaped rail 200C may be associated with the top-left member 104TL and the top-right member 104TR of each of the plurality of lateral members 102.

[047] Referring now to FIGs. 3A-3B, a perspective view and a side view, respectively of a L-shaped rail 300 are illustrated, in accordance with some embodiments. As shown, the L-shaped rail 300 may include a plurality of holes 302 to allow the L-shaped rail 300 to be coupled to the C-shaped rails 200A, 200C or to other L-shaped rails 300, or any other part of a structure of the semi-monocoque body 100. For example, the L-shaped rail 300 may be associated with each of the stringer members 106.

[048] As mentioned above, the C-shaped rail 200A may include one or more cut-outs 204 that may be configured to allow the L-shaped rail 300 (of the stringer member 106) to be engaged with the C-shaped rail 200A of an associated lateral member 102. The substantially V-shaped cut-outs 204 allow the L-shaped rail 300 to engage and couple with the C-shaped rail 200 A. [049] Referring now to FIGs. 4A-4B, a perspective view and a side view of a modified-C-shaped rail 400 are illustrated, in accordance with some embodiments. As shown, the modified-C-shaped rail 400 may include a plurality of holes 402 to allow the modified-C-shaped rail 400 to be coupled to C-shaped rails 200A, 200C or to L-shaped rails 300, or any other part of a structure of the semi-monocoque body 100. In some embodiments, the modified-C-shaped rail 400 may be associated with each of the front face 110A and the back face HOB of the semi-monocoque body 100. As such, the left leg member 104L, the right leg member 104B, the top horizontal member 104T, the bottom horizontal member 104B, the top-left member 104TL, and the top-right member 104TR associated with the front face 110A and the back face HOB may include the modified-C-shaped rail 400.

[050] Referring now to FIG. 5, a perspective view of an assembly 500 of the C-shaped rail 200 A and the L-shaped rail 300 is illustrated, in accordance with some embodiments. As shown, the assembly 500 may include the C-shaped rail 200A and the L-shaped rail 300. As will be understood, the C-shaped rail 200A may be associated with the lateral member 102, and in particularly with the top horizontal member 104T. Further, the L-shaped rail 300 may be associated with the stringer member 106. The assembly 500 may further include one or more shear clips 502 to attach the C-shaped rail 200A and the L-shaped rail 300 together. The assembly 500 may further include a plurality of fasteners (not shown in FIG. 5) for example, for attaching the shear clip 502 with the C-shaped rail 200A and the L-shaped rail 300, via a plurality of holes 504. To this end, each of the shear clip 502, the C-shaped rail 200 A, and the L-shaped rail 300 may include a plurality of holes 504. The plurality of fasteners, for example, may include a nut-bolt assembly, a screw, or a rivet.

[051] Referring now to FIGs. 6A-6I, perspective view of shear clips 600A, 600B, 600C, 600D, 600E, 600F, 600G, 600H, and 6001 (corresponding to the shear clip 502) are illustrated, in accordance with some embodiments of the present disclosure. The shear clips 600A-600I may be used to attach the C-shaped rail 200 A, 200C with the L-shaped rail 300, via a plurality of fasteners. To this end, each of the shear clips 600A-600I may include two faces 602, 604 (as shown in FIG. 6A) inclined to each other substantially perpendicularly. Further, each of the two faces 602, 604 may include one or more holes 606. One of the shear clips 600A-600I may be sued for attaching the C-shaped rail 200A, 200C with the L-shaped rail 300 depending on the space available and strength of the attachment required.

[052] Referring now to FIGs. 7A-7B, snapshots 700A, 700B of the semi- monocoque body 100 of the road vehicle are illustrated, in accordance with some embodiments of the present disclosure. As shown, the semi-monocoque body 100 may include the plurality of lateral members 102, each defining an inverted U-shape. Each lateral member 102 may further include the left leg member 104L, the right leg member 104R, the top horizontal member 104T, the bottom horizontal member 104B, the top-left horizontal member 104TL, and the top-right horizontal member 104TR. Further, in some embodiments, each of the left leg member 104L, the right leg member 104R, the top horizontal member 104T, the top-left horizontal member 104TL, and the top-right horizontal member 104TR may include at least one C- shaped rail 200A. Further, each of the plurality of lateral members, the left leg member 104L, the right leg member 104R, the top horizontal member 104T, the bottom horizontal member 104B, the top- left horizontal member 104TL, and the topright horizontal member 104TR may include may define the cut-outs.

[053] Further, as shown, the left leg member 104L may be attached to the top-left horizontal member 104TL via a plurality of fasteners and optionally using one or more shear clips 502. Similarly, the right leg member 104R may be attached to the top-right horizontal member 104TR via a plurality of fasteners and optionally using one or more shear clips 502. Further, the top-left horizontal member 104TL may be attached to the top horizontal member 104T via a plurality of fasteners and optionally using one or more shear clips 502. The top-right horizontal member 104TR may be attached to the top horizontal member 104T via a plurality of fasteners and optionally using one or more shear clips 502. [054] The semi-monocoque body 100 may include the plurality of stringer members 106, aligned substantially perpendicularly to the plane of the lateral member 102. Each of the plurality of stringer members 106 may include one or more L-shaped rails 300. Each the plurality of stringer members 106 may be engaged with an associated lateral member 102 via the cut-out 204 defined by the associated lateral member 102.

[055] The semi-monocoque body 100 may further include the roof skin member 108D that may be attached to the frame 101 defined by the plurality of lateral members 102 and the plurality of stringer members 106, via a plurality of attachments couplings 702. Each of the attachment couplings 702 may include a fastener selected from a nut-bolt assembly, a screw, and a rivet. As already mentioned above, the skin member 108D may be a sheet of a metal, an alloy, a plastic, or a composite material.

[056] Referring now to FIG. 8A-B, a top view of the frame 101 (including the plurality of lateral members 102 and the plurality of stringer 106) and a magnified view 800B of a section A of the frame 101 of FIG. 8A, respectively, are illustrated in accordance with some embodiments of the present disclosure. As shown in FIG. 8A, the frame 101 includes the plurality of lateral members 102 and the plurality of stringer 106 each to each other via multiple assemblies.

[057] As shown in FIG. 8B, the section A includes an assembly of the lateral member 102 (of the plurality of lateral members 102) and the stringer member 106 (of the plurality of stringer members 106) attached to each other. As mentioned earlier, the lateral member 102 may include the C-shaped rail 200A and the stringer member 106 may include the L-shaped rail 300. Each of the C-shaped rail 200A and the L-shaped rail 300 may include a plurality of holes to attach an associated skin member 108 to the assembly of the C-shaped rail 200A and the L-shaped rail 300. In some embodiments, in the assembly of the C-shaped rail 200A and the L-shaped rail 300, the C-shaped rail 200A may include holes 804D, 804E, and the L-shaped rail 300 may include holes 804A, 804B, 804C. Further, in this embodiment, a middle hole, i.e. the hole 804b may lie on an intersection of a first (imaginary) line connecting the holes 804D, 804E of the C-shaped rail 200A and a second (imaginary) line connecting the holes 804A, 804C of the L-shaped rail 300. This design provides for a sturdy and strong attachment of the skin member 108 with the frame of the C- shaped rail 200A and the L-shaped rail 300. For further strengthening, the assembly may further include the shear clip 502 to attach the C-shaped rail 200 A with the L- shaped rail 300.

[058] Further, in the above embodiment, a distance between the hole 804E of the C-shaped rail 200A and the middle hole 804B may be 27 mm. A distance between the hole 804D of the C-shaped rail 200 A and the middle hole 804B may be 38 mm. A distance between the hole 804A of the L-shaped rail 300 and the middle hole 804B may be 55.5 mm. A distance between the hole 804C of the L-shaped rail 300 and the middle hole 804B may be 61.5 mm.

[059] In another embodiment, a road vehicle implementing a semi- monocoque body is disclosed. The road vehicle may include the semi-monocoque body 100. The semi-monocoque body 100 may include the plurality of lateral members 102. Each of the plurality of lateral members 102 may define an inverted U- shape in a lateral plane (P). Each of the plurality of lateral members 102 may include the left leg member 104L and the right leg member 104R. The left leg member 104L and the right leg member 104R of each of the plurality of lateral members 102 may include at least one C-shaped rail 200A, 200C. For example, a sheet thickness of each of the at least one C-shaped rail may be 2.5 mm. The plurality of lateral members 102 may be distributed along the length of the semi-monocoque body 100. Each adjacent pair of lateral members of the plurality of lateral members 102 may be separated by a minimum predefined distance. The left leg member 104L and the right leg member 104R of each of the plurality of lateral members 102 may include at least two C- shaped rails 200A, 200C. The at least two C-shaped rails 200A, 200C may be positioned one within the other of the at least two C-shaped rails 200A, 200C. Each of the plurality of lateral members 102 may define the cut-out 204. [060] Each of the plurality of lateral members 102 may further include a top horizontal member 104T. The top horizontal member 104T may include at least one C-shaped rail 200 A, 200C. The left leg member 104L and the right leg member 104R may be attached to the top horizontal member 104T via a left end and a right end, respectively of the top horizontal member 104T. The left leg member 104L and the right leg member 104R may be attached to the top horizontal member 104T via at least one fastener. The at least one fastener may be selected from a nut-bolt assembly, a screw, and a rivet.

[061] In some embodiments, each of the plurality of lateral members 102 may further include the top-left member 104TL attached to the left leg member 104L and the top horizontal member 104T via a first end and a second end, respectively of the top-left member 104TL. Each of the plurality of lateral members 102 may further include a top-left member 104TL attached to the right leg member 104R and the top horizontal member 104T via a first end and a second end, respectively of the top-left member 104TL. The top-left member 104TL may be attached to the left leg member 104L and the top horizontal member 104T via at least one fastener. The top-right member 104TR may be attached to the right leg member 104R and the top horizontal member 104T via at least one fastener. The at least one fastener may be selected from a nut-bolt assembly, a screw, and a rivet.

[062] The semi-monocoque body 100 may further include the plurality of stringer members 106. Each the plurality of stringer members 106 may be positioned along the length of the semi-monocoque body 100 and substantially perpendicular to the plurality of lateral members 102. Each the plurality of stringer members 106 may be engaged with an associated lateral member of the plurality of lateral members 102 via the cut-out 204 defined by the associated lateral member 102. In some embodiments, each of the plurality of stringer members 106 may be coupled with the plurality of lateral members 102, for example, via a shear clip, using fasteners like rivets. The plurality of lateral members 102 along with the plurality of stringer members 106 define the frame 101 of the semi-monocoque body 100. Each of the plurality of stringer members 106 may include the at least one L-shaped rail 300. A sheet thickness of each of the at least one L-shaped rail may be 2.5 mm.

[063] The semi-monocoque body 100 may further the skin member 108 attached to the frame 101 defined by the plurality of lateral members 102 and the plurality of stringer members 106, via a plurality of attachments couplings. In some embodiments, each of the plurality of attachments couplings may include at least one fastener. The at least one fastener may be selected from a nut-bolt assembly, a screw, and a rivet. In the above embodiments, the C-shaped rail 200A, 200C and the 1- shaped rails 300 may be made of Aluminium (Al) and in particularly, Al 6082 T6.

[064] It is intended that the disclosure and examples be considered as exemplary only, with a true scope and spirit of disclosed embodiments being indicated by the following claims.