FIELD OF THE INVENTION
The present invention generally relates to a motorcycle and more particularly to the packaging layout of the motorcycle.
BACKGROUND OF THE INVENTION
In existing mono rear suspension type motorcycles, rear suspension system is mounted between left and right parts of the rear frame members. Due to this centre mounting lot of space left become unused as no embodiment or part of the vehicle can be fitted there. Sometimes, in order to increase the space rear frame member is lifted upwards and the length is increased. This change reduces the strength of the frame, which is not permissible thus space requirement cannot be fulfilled.
SUMMARY OF THE INVENTION
Main objective of present invention is to provide an improved packaging layout for the motorcycle. Disclosed packaging' layout will facilitate more free space in the vehicle to accommodate different embodiments without compromising the strength of the vehicle.
In provided layout of the motorcycle, frame is made up of the tubular as well as sheet or delta type frame member. Front part of the frame is made up of the tubular structure and the rear part of made up of the sheet metal which is also acting as the engine mounting bracket. Combination of two types of frame members is facilitating required strength of the overall frame due to tube member and reducing weight and number of parts at the rearmost end of the frame. Also,
use of sheet metal / delta type frame member in the rear side of frame is increasing the space available between left and right frame members of the frame which helps in easy mounting and serviceability of the engine.
Further, rear suspension system of the vehicle is mounted on the side of the vehicle such that upper end of said rear suspension system is fixed with the connecting tube of left and right members of the frame and lower, end is mounted on the transmission unit case. Position of the rear suspension is kept such that it is providing free space on its other side in the vehicle. This space can be used for accommodating required embodiments on the other side of the rear suspension unit.
Summary provided above explains the basic features of the invention and does not limit the scope of the invention. Additional detailed information related to the enablement of the invention will be provided in the detailed description and accompanying claims. Scope of the invention shall be based on the claims provided.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more fully understood, from the detailed description given herein Below and the accompanying drawing(s). Provided drawings are incorporated in and constitute embodiments of the invention and illustrates several aspects of the invention and together with a description of the embodiments serve to explain the principles of the invention. Drawings given below are provided to support the description of the invention and are not limiting
the scope of the present invention. A brief description of the drawing is as follows:
Figure 1 and Figure 2 are providing side views of the vehicle depicting essential embodiments of the described invention.
Figure 3 is depicting the mounting arrangement and packaging layout if the essential embodiments of the described invention.
Figure 4 is showing essential embodiments depicting the best mode of the invention.
Figure 5 is describing an essential embodiment of the invention and showing its mounting arrangement.
DETAILED DESCRIPTION OF THE DRAWINGS
The embodiments disclosed below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following detailed description. Rather, the embodiments are chosen and described so that best enabling arrangements of the invention can be explained through all possible embodiments and examples of it. The invention may have application to all kind of two wheeled vehicles.
Referring to Figure 1, Figure 2 and Figure 3, motorcycle M has a frame 101 that is made up of the tubular 101a as well as sheet or delta type frame member 107. Front part of the frame 101 is made up of the tubular structure 101a and the rear part of made up of the sheet/pressed metal 107 which is also acting as the engine mounting bracket.. Said tubular structure 101a is extending rearwards
followed by a downward extension such that the rearward extension is forming a primary curve approaching the downwards extension.
Said tubular structure 101a and pressed metal (delta type) member 107 are connected with each other at primary joint 108 such that strength of the frame 101 can be maintained. Said frame 101 has identical left and right frame members linked with each other through connecting tubes 102a, 102c and 102d. In this frame 101, combination of two types of front frame members 101a, 107. is facilitating required strength of the overall frame due to tube member 101a and reducing weight and number of parts at the rearmost end of the frame due to use of delta type member 107. Also, use of sheet metal / delta type frame member 107 in the rear side of frame 101 is increasing the space available between left and right frame members of the frame 101 which helps in easy mounting and serviceability of the engine.
Further, rear suspension system 103 is mounted on the side of the motorcycle M, such that upper end of said rear suspension.system 103 is fixed with the connecting tube 102a of left and right members of the frame 101 at the joint 102 and lower end is mounted on the transmission unit case 106 at the mounting joint 104. Position of the fear suspension unit 103 is kept such that a free space S on its other side can be achieved. This space S can be used for accommodating required embodiments on the other side of the rear suspension unit according to motorcycle packaging requirement.
Thus specific location of the rear suspension on the frame and transmission case along with the use of delta type rear frame member in the frame increases the
space available on rear side of the vehicle. Said space can be used to accommodate different embodiments like muffler, or air cleaner with will provide easy mounting and servicing facility for same.
Referring to Figure 4, front part 101a of frame 101, rear suspension 103 and the wheel axle Ax lies along a single inclined line L. This inclined line forms a specific angle A with the ground level such that the strength of the frame can be maintained. For best explanation this angle A lies between 25- 32 degrees.
Further, as shown in Figure 4 and Figure 5, rear part 112 of the frame is mounted on the primary curve of the front part 101a of the frame 101. Said rear part 112 is mounted at three locations out of which upper two mountings are provided at the 115 (left and right) above the mounting of the rear suspension 103. A downward arm 113 is extending downwards from upper arm of the rear frame part 112 and is integrated with the lower arm and said lower arm is fixed with the one of side arm of the front frame part 101a at secondary joint 114 below the joint of the tube member 101a and delta type member 107.
Mounting arrangement of the rear part 112 of the frame is such that the downward load P (as shown in Figure 4) is distributed along the three mounting points 115, 114. Eventually, from said mounting points this load P gets distributed in the frame along the inclined line L. This distribution of the load P improves the load taking capacity of motorcycle frame. Also described mounting arrangement provides freed space for mounting of bigger embodiments, better aesthetics and also maintains the strength of the frame.
WHAT IS CLAIMED IS
1) A motorcycle comprising a frame having a front part and a rear part such that:
the front part is a tubular structure connected with a pressed metal structure at
atleast one primary joint such that said front part has identical left and right member connected with a connecting tube and upper end of a front suspension unit is fixed in the vicinity of one end of the connecting tube and with a transmission unit at a mounting joint at its lower end;
wherein, the front part of the frame, the rear suspension unit and an axle of a rear wheel lies in single inclined line forming a prescribed angle with respect to the ground level; and
the rear part of the frame is connected to the front panel of the frame at a plurality of mounting locations such that atleast one mounting location is above the mounting location of the rear suspension system;
wherein, the rear part has an upper arm and an lower arm connected through a downward extension from the upper arm and said lower arm is fixed with the front frame member at atleast one secondary joint.
The motorcycle comprising a frame, as claimed in claim 1, wherein the tubular structure is extending rearwards followed by a downward extension.
The motorcycle comprising a frame, as claimed in claim 1 and claim 2, wherein the rearward extension is forming a primary curve approaching the downwards extension.
The motorcycle comprising a frame, as claimed in claim 3 and claim 1, wherein the upper portion of the rear part is fixed with the front part in near proximity of the primary curve.
The motorcycle comprising a frame, as claimed in claim 1, wherein the pressed metal structure is configured to facilitate mounting of an engine.
The motorcycle comprising a frame, as claimed in claim 1, wherein the space between the rear suspension unit and other end of the connecting rod defines a free mounting space above the engine.
The motorcycle comprising a frame, as claimed in claim 1, wherein the prescribed angle between the inclined line and the ground level varies from 25 degree to 35 degree.