The present assembly relates to the structures forming the body of a vehicle. More specifically, the present assembly relates to construction of a blast resistant vehicle having a low profile and reduced weight, using a combination of monocoque and space frame construction.
Vehicle frames provide a platform upon which a body can be supported and other components of a vehicle can be mounted. Generally, in the light automotive world, the vehicle frame more closely emulates a space frame type of structure, giving it a light weight, low-profile package, increasing the speed, agility and fuel economy of the vehicle, while decreasing the material cost. Heavier vehicles, such as trucks typically use body-on-frame or a ladder frame assembly. A ladder frame assembly includes a pair or longitudinally extending side rails that are joined together by a plurality of transversely extending cross-members. The cross-members connect to the two side rails together and provide lateral and torsional stiffness to the ladder frame assembly. Typically, the two side rails are solid pieces of steel and are substantially C-shaped in cross-section. Thus, the resulting frame is heavy, and the addition of any armored protection, such as for a vehicle for military use, makes the vehicle even heavier.
Another form of vehicle construction is monocoque, which is a construction technique that supports structural load by using an object's external skin, as opposed to using an internal frame or truss that is then covered with a non-load-bearing skin. The term is also used to indicate a form of vehicle construction in which the body and chassis form a single unit. Vehicles requiring a high degree of armored protection, such as tanks, often use a monocoque hull construction taking advantage of the material strength of the armor to act as structure.
In vehicles intended for military applications, greater mobility, higher speeds, low weight and low profile become quite important. However, there is still a requirement to provide armored protection for blast resistance to the occupants of the vehicle, while providing the previously-stated features. This is particularly true for the family of light tactical vehicles (FLTV), which are common in today's military fleet. Combining an armored monocoque construction for a personnel cabin, with a separately attached space frame-type construction for the chassis, engine and power train compartments, achieves a blast protection vehicle having both a low profile and reduced weight. This modular construction also provides assembly advantages, such as reducing plant line space, a more efficient final assembly process and improved dimensional integrity.
There is disclosed herein an structure and assembly for constructing a vehicle frame for a reinforced military vehicle, which avoids the disadvantages of prior structures while affording additional structural and costs advantages
Generally speaking, the present assembly relates to a modular vehicle frame structure, which combines a monocoque cabin structure with separately attachable space frame structures.
In an embodiment, the modular vehicle body assembly comprises a monocoque cabin structure, a front frame section and a rear frame section, wherein the front and rear frame sections secure separately to the respective front and rear sections of the cabin structure and extend longitudinally therefrom forming a modular vehicle body with the cabin structure.
In another embodiment, modular architecture for forming a vehicle body for a military vehicle, is disclosed. The vehicle body comprises a cabin module for occupants of the vehicle, and at least one longitudinally extending structural member for supporting a powertrain, wherein the structural member is attached to the cabin module forming a modular body assembly.
These and other features and advantages of the modular vehicle body assembly can be more readily understood from the following detailed discussion with reference to the appended drawing figures.
Referring to
Use of space frame type of construction for vehicle body frames is known. Tubular space frame construction is desired to provide a frame with a light weight and low profile package. In addition, vehicle body frames are generally constructed as one continuous structure, including the front, rear and passenger sections of the vehicle.
The present assembly 10 incorporates an embodiment of a space frame construction. However, instead of constructing the frame for the present assembly 10 as single, unified structure, it utilizes a separate, modular front frame section 30 and a separate, modular rear frame section 40 (
Referring to
In addition to the monocoque construction, the cabin module 20 may include other structural features to enhance its blast protection. For example, as shown in
The modular construction of the present assembly 10 achieves a lower profile, reduced weight vehicle useful for military operation, while providing armored protection for the occupants. The modular construction also permits customization construction of a particular vehicle. Elimination of the frame rail under the cabin means the vehicle is capable to meet requirements for transport of sea-going vessels. As shown in
Modular construction provides an assembly plant advantage by reducing plant line space, improving dimensional integrity and a robust final assembly process. Specifically, modules can be built with individual attention to detail so a smaller number of modules are put together on the assembly line instead of a large number of detail parts, minimizing the number of simple fixture avoiding large complex fixtures. Ultimately this provides a completed vehicle with a high degree of dimensional accuracy minimizing the amount of adjustment necessary to the completed vehicle for assembly and alignment. This is also important for service when damaged parts are removed, allowing the replacement parts to fit perfectly with minimum final adjustment required.
This application claims the benefit of U.S. Patent Application Ser. No. 61/533,883 filed on Sep. 13, 2011.
Number | Date | Country | |
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61533883 | Sep 2011 | US |