Claims:[Claim 1] In figure 500(B) and figure 600, members 502, 503, 504, 505 together constitute a supporting member for storage unit 601, in which 503 is at an angle of 123.69° to 504 and 505 is at an angle of 123.3° to 504. The overall length available for accommodating storage units is 619.61mm which is from 501 to 506 in figure 500(A). This offers convenient access to the storage unit. 506 represents the seat member which includes both the rider and pillion rider with an overall length of 635.22mm which is at an angle of 125.3° with 505. This ensures rider ergonomics as well as offers comfortable sitting space for both the rider and pillion. In figure 500(D), member 502 is at an angle of 149.04° with respect to steering column member 501, the angle between 510 and 509 is 166.6°, and the member 509 is at angle 76.84° from 521, the member 517 is at an angle 164.35° from 511.

[Claim 2] In figure 500(B), 507 is the supporting member for the seat member which is at an angle of 53.4° to seat member 506. In addition to this, a triangular metal plate of thickness 4mm is kept in contact between supporting member 507 and seat member 506 for better stiffness and decreased deflection or deformation of the overhanging part of the seat member. Member 510 arising from 501 makes an angle of 171.03° with 509, member 509 makes an angle of 115.81° with 508 and member 508 makes an angle of 124.6° with 507, In figure 500(B), the members 504 and 508 are placed with a distance of 117.36mm between them which gives better spacing for accommodating various electrical components and also ensuring its safety with truss members acting as a housing. Truss members 517, 516, 515 & 514 are placed in between 504 and 508, In which the truss member 517 is at an angle of 68.59° with 508, the angle between the truss members 517 and 516 is 74.95°, the angle between the truss members 516 and 515 is 76.67°, the angle between the truss members 515 and 514 is 75.95°, truss member 514 makes an angle 87.41° with the member 507, truss member 518 is placed in between 502, 503 and 509, 510 at an angle of 131.31° with 502. Five truss members 518, 517, 516, 515 & 514 increase the stiffness of the chassis.

[Claim 3] In figure 500(B), members 511, 512, and 513 together act as supporting members or housing cage for battery with casing and an electric motor in such a way that they could be placed inline. Member 512 is placed at a distance of 224.6mm from 508, the members 511 and 513 is placed parallelly at a distance of 523.68mm apart from each other to provide sufficient space for the battery and its casing and electric motor and also ensure ease in installing and removing the same, member 511 makes an angle of 90° with 512 and member 513 makes an angle of 90° with 512. The trapezoidal-shaped metal plates of thickness 4mm are used as swingarm mounts which are fixed to members 508 and 513 at an angle of 140.19° with 508.

[Claim 4]In figure 500(C), a fillet of radius 62.7mm is given in between 511 and 512, a fillet of radius 112.7 is given in between 513 and 512, a fillet of radius 228.65mm is given in between 510 and 509, a fillet of radius 52.8mm is given in between 509 and 508, a fillet of radius 62.79mm in between 508 and 507. Fillets are given at particular points in the design to evenly distribute the stress concentration along with the entire chassis. In addition to the stress concentration factor, stress flow(distribution) also plays an important role in which material and cross-section is an important contributing factor. Therefore, in figure 500(A) and 500(D), the double-cradle electric bike chassis consists of a tubular cross-section with a tube diameter of 1 inch and section thickness of 1.65mm and material used is Chromoly AISI 4130, the tubular diameter of steering column 501 is 1.5 inches with a section thickness of 3mm. Chromoly AISI 4130 is used particularly to reduce the weight yet retain the stiffness of the chassis and it is also easily available in the market which makes it economical to use.

[Claim 5] In figure 600, unit 601 represents the storage unit with a maximum storage capacity of 30L housed in our frame and accommodates one full face and a half-face helmet. The invention is designed and installed in place of a traditional motorbike's petrol tank, allowing the rider to access the contents of the storage unit while seated on the motorcycle.
, Description:TECHNICAL FIELD
[0001] With the increasing pollution and stricter emission norms, there is an urgent need to switch to green technology. In India, 62% of petrol is consumed by motorcycles. Therefore, there is a major scope of reducing pollution through electrically driven motorcycles. The work is mostly focused on the automobile industry, specifically our invention aims at building a better electric motorcycle chassis with a unique storage unit.
BACKGROUND ART
[0002] Two-wheelers are the most common and widely utilized means of transportation in countries such as India. People in India usually prefer the moped type two-wheeler vehicles due to the storage features, lightweight and durable for city rides, whereas the youngsters mainly are attracted towards the naked sports bike due to its performance and aesthetic looks but the main drawback why it has failed to reach majority of the people other than youngsters is due to its lacks of storage unit in it.

[0003] So our idea was to build a performance chassis that can accommodate storage units as well as the freedom to fit in modern and sportive aesthetics. The storage unit in our electric bike chassis is uniquely positioned replacing the fuel tank as seen in conventional motorcycles. Due to this unique positioning, the rider has ease of accessibility. The storage unit is designed in such a manner that it can accommodate a full-face helmet with a half-face helmet as well. With this feature provided, it reduces the anxiety of the rider as the documents and items would be safe inside the storage. The double-cradle chassis is capable of accommodating a battery with a casing and a motor. Our chassis can accompany two riders with a good amount of storage space.
SUMMARY OF THE INVENTION
PROBLEMS TO BE SOLVED BY INVENTION
[0004] In an electric two-wheeler, the storage system is made accessible. The storage compartment is located in a specific location present on this naked sports bike. The storage unit is exactly placed above the battery unit and right in front of the rider's seat where the fuel tank would lie in a typical conventional motorcycle. So we devised a plan to create a performance chassis with improved looks that could also serve as a storage box. In contrast to traditional bikes, the storage unit in our electric bike chassis is strategically positioned to replace the petrol tank. The rider gets easy access because of its unusual location. The storage box is constructed in such a way that it can hold both a full-face and a half-face helmet. The rider's concern is reduced by this function because the documents and items are protected within the storage. A battery with a casing and a motor can be accommodated on the double-cradle chassis.

EFFECTS OF THE INVENTION
[0005] Following the present invention, the chassis mainly consists of 3 main members (Top Member - Storage and seat member, Middle Member and Bottom most member) which are numbered whose explanation can be found in “EXPLANATION OF REFERENCE NUMERALS AND SYMBOLS”.

[0006] The topmost member and the middle member are fixed to the steering column. The battery member is fixed to the middle member. The truss members are placed to increase the stiffness of the chassis as well as provide better load-bearing capacity. Therefore, the chassis is stiffer and light in weight.

[0007] The stiffener is fixed under the seat to provide additional support for overhanging seat member. The invention is designed keeping the location of the swingarm mount point in mind.

[0008] In nations like India, two-wheelers are the most prevalent and commonly used mode of transportation. People in India prefer moped-style two-wheeler vehicles because of the storage features, as well as the fact that they are lightweight and durable for city rides. Youngsters, on the other hand, are drawn to naked sports bikes because of their performance and aesthetic appeal. However, the main reason why it has failed to reach the majority of people other than young people is that it lacks a storage unit. Hence, this invention of having a frontal storage unit helps solve the problem of storage units in naked sports bike type 2 wheelers.

BRIEF DESCRIPTION OF DRAWING
[0009] The figures below show the various views and the diagrams of the chassis which is designed to accommodate the storage unit of 30L. The effort is made to ensure that the chassis design is structurally stiff and safe to be driven around. The chassis design is a type of double cradle design where the motor and battery are placed on the double cradle.

[0010] The chassis is designed to be light yet stiff to bear a good amount of load due to the road conditions, weight on the bike and the impacts due to accidents. The chassis of the electric bike is designed to be suitable for two riders to sit comfortably and also accommodate 30L of storage in the storage unit.

[0011] The invention will be described and explained with additional specificity and detail through the accompanying drawings so that the advantages of the present invention will be readily understood.

[0012] Figure 500(A) represents the clear drawing of the chassis with the clearly numbered structural members that are used in making the chassis.

[0013] Figure 500(B) represents the detailed description of the chassis design. The figure is used to represent important dimensions and angles in the chassis that we propose to claim.

[0014] Figure 500(C) represents the detailed description of the chassis design. The figure is used to represent important fillet dimensions that are essential in the shape and stiffness of the chassis.

[0015] Figure 500(D) represents the front view of the chassis designed for the electric bike with storage. The drawing also has important dimensions and angles of the structural members that are seen in the chassis.

[0016] Figure 600 is a simple representation of the chassis with the storage unit installed. This figure gives us a clear representation of the positioning and the placement of the storage unit on the chassis.
EXPLANATION OF REFERENCE NUMERALS AND SYMBOLS
[0017] 501 - Steering column
502, 503, 504, 505 and 506 - Top Member - Storage and seat member
507, 508, 509 and 510 - Middle Member
511, 512 and 513 - Bottom most Member - Battery And Motor member
514 - Truss 1
515 - Truss 2
516 - Truss 3
517 - Truss 4
518 - Truss 5
519 - Web stiffener
520 - Swingarm mount
521 - Lateral member for Electronics support
601 - Storage unit
MODES FOR CARRYING OUT INVENTION
[0018] The FIGURE 500(A), drawing has a total of 20 important reference points, where 501 represents the steering column point which is used to mount the steering onto the chassis. 502, 503, 504, 505 and 506 collectively represent the topmost structural member of the chassis which is responsible for mounting the storage and also acts as a seat for riders. 507, 508, 509 and 510 collectively represent the middle member which is an essential structural member which is used to mount the necessary electronic controllers for the bike and also take the various loads. 511, 512 and 513 collectively represent the structural member for placing the battery and the electric motor. 514, 515, 516, 517 and 518 represent the truss member which is very essential for stiffness in the bike. 519 represents the web stiffener used to provide appropriate seat support and prevents large deformations. 520 represents the mount points for the swingarm and the swingarm gets pivoted.

[0019] FIGURE 500(B), drawing is a detailed representation of the chassis with the essential dimensions that are considered in the process of designing the chassis which includes seat length, storage unit length and battery placement height.

[0020] FIGURE 500(C), the drawing is a detailed representation of the chassis with fillet dimensions at various places with the most important fillet being between 512 and 513 which serves as motor positioning.

[0021] FIGURE 500(D), drawing is a representation of the front view of the chassis and also has the essential dimensions 517 and 521 and 511 and 517.

[0022] FIGURE 600, is the representation of the positioning of the storage unit that is capable of accommodating a maximum vol of 30L.