DESC:TECHNICAL FIELD
[001] The embodiments herein generally relate to a braking system, and more specifically but not exclusively to a combined braking system for two wheelers having front and rear braking system.
BACKGROUND
[002] In the last few decades, two-wheeler automobile industry has shown a remarkable growth and development, in terms of technology as well as sales. Due to consistent advancement in technology, two-wheeled vehicles, such as bicycles, two wheelers, scooters and light-weight scooters, have succeeded in maintaining their popularity among different sections of society. Different sections of society, based on their requirement, utilize the two-wheeled vehicles for various purposes, such as a recreational activity, a means of transportation, and for sports activities, etc. As a result, it becomes pertinent for the two-wheeler automobile industry to constantly develop and modify the components of the two-wheeled vehicles to suit requirements of riders.
[003] Most conventional braking systems for two-wheelers have two independent brake devices for the front wheel and the rear wheel which are driven by two independent cables and operated by a right lever and a left lever or foot pedal respectively. This arrangement enables the rider to slow down or stop the two-wheeler by braking only the front wheel, or only the rear wheel. Usually the rider avoids using the independent front brake in fear of wheel lock and applies only the rear brake. However, when the rider is a new user or in the event of unexpected road disturbances, coupled with the high speed of the vehicle, the rider may suffer from longer stopping distances or early wheel lock and thereby resulting in unbalance or skid of the vehicle.
[004] For this issue, a new design having synchronous or balanced brake systems was developed (combined brake system). Using this braking design, the rider can control the braking of the front and the rear wheels simultaneously by applying brake through one brake lever to slow down or stop the vehicle. However, in conventional combined braking systems, the two brakes generally are not operated at exactly the same time or with equal force. In such situation, one of the wheels may lock, while the other is still rolling. Thus leading to reduced braking. A drive type involving such braking can thus easily lead, to particular state of danger deriving from the possible jamming, and hence, unbalance or skidding of the wheel.
[005] Therefore, there exists a need for an optimized design of combined braking system which obviates the aforementioned drawbacks.

OBJECTS
[006] The principal object of the embodiments disclosed herein is to provide a combined braking system that divides the overall braking between a front wheel brake and a rear wheel brake.
[007] Another object of the embodiments disclosed herein is to provide an optimized design of combined braking system which distributes a force applied while braking to the front wheel brake and a rear wheel brake through single actuation.
[008] Yet another object of the embodiments disclosed herein is to provide a combined braking system that divides the overall braking force between a front wheel brake and a rear wheel brake to achieve maximum deceleration.
[009] Still another object of the embodiments disclosed herein is to provide a method of actuating a combined braking system that divides the overall braking force between a front wheel brake and a rear wheel brake.
[0010] These and other objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF DRAWINGS
[0011] The embodiments of the invention are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0012] FIG. 1 depicts a perspective view of a combined braking system assembled to a two-wheeler, according to an embodiment of the invention as disclosed herein;
[0013] FIG. 2adepicts an isometric view of combined braking system box, according to an embodiment of the invention as disclosed herein;
[0014] FIG. 2b depicts a front view of a combined braking system box, according to an embodiment of the invention as disclosed herein;
[0015] FIG. 2c depicts a side view of a combined braking system box, according to an embodiment of the invention as disclosed herein;
[0016] FIG. 3 depicts a flowchart of a method of actuating a combined braking system, according to an embodiment of the invention as disclosed herein; and
[0017] FIG. 4 depicts the operational view of the cable adjuster, according to an embodiment of the invention as disclosed herein.

DETAILED DESCRIPTION
[0018] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0019] The embodiments herein achieves a combined braking system that divides an overall braking force between a front wheel brake and a rear wheel brake to achieve maximum deceleration. Referring now to the drawings, and more particularly to FIGS. 1 through 4, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0020] FIG. 1 depicts a perspective view of a combined braking system 100 assembled to a two-wheeler, according to an embodiment of the invention as disclosed herein. In an embodiment, the combined braking system assembly 100 includes a front brake lever 102 provided at right-hand side of the two-wheeler (also referred as vehicle), a rear brake lever 104 provided on left-hand side of the two-wheeler (also vehicle), an input brake cable 106, a combination braking system box108 (also referred as synchronization assembly 108), a pulley 110, a slider 112, at least one string 114, a front brake force multiplier 116, a rear brake force multiplier 118, a first output cable 120 to front wheel brake, a second output cable 122 to rear wheel brake, a pulley holder 124 and a cable adjuster 132.
[0021] In an embodiment, the vehicle considered for describing the embodiments herein is a two-wheeled vehicle having a front end 101a and a rear end 101b. In an embodiment, the vehicle includes the front wheel brake lever 102 and the rear wheel brake lever 104 connected to right side and left side of the vehicle at the front end.
[0022] In an embodiment, the input brake cable 106 is connected to the rear brake lever 104 provided on the left side of the two-wheeler. In an embodiment, the input brake cable 106 is connected to at least one of the front wheel brake lever 102 and the rear wheel brake lever 104. However, it is also within the scope of the invention to provide input brake cable on any lever of the two-wheeler without otherwise deterring the intended function of braking as can be deduced from this description and corresponding drawings.
[0023] FIGS. 2a to 2c depict isometric view, front view and side view of a synchronization assembly 108, according to an embodiment of the invention as disclosed herein. In an embodiment, the input brake cable 106 is connected to the synchronization assembly 108 through the cable adjuster 132. In an embodiment, the cable adjuster 132 includes, two right angle triangle shaped sliders (132a and 132b) configured to slide along their diagonal sides as shown in FIG. 4. Further, the cable adjuster 132 includes a compression spring 132c housed (i.e. included in both the right angle triangle shaped sliders) in the two right angle triangle shaped sliders (132a and 132b) configured to push the two right angle triangle shaped sliders (132a and 132b) apart by a predetermined force. In an embodiment, the diagonal sides of the two right angle triangle shaped sliders (132a and 132b) include high friction surfaces. In an embodiment, the two right angle triangle shaped sliders (132a and 132b) is displaced from an initial state to a adjusted state. In an embodiment, the two right angle triangle shaped sliders (132a and 132b) at its initial state (installed condition) includes a length “L”. In an embodiment, the two right angle triangle shaped sliders (132a and 132b) at its adjusted state includes a length of “L+ ?” as shown in FIG. 4.
[0024] In an embodiment, the synchronization assembly 108 includes a chamber 126. In an embodiment, the chamber 126 is a box having a first end surface 126a, and a second end surface 126b. However, it is also within the scope of the invention to provide the chamber in any shape without otherwise deterring the intended function of housing the synchronization assembly as can be deduced from this description and corresponding drawings. In an embodiment, the chamber 126 includes at least one first through hole 128 and at least two second through hole 130 formed in the first end surface 126a and the second end surface 126b respectively.
[0025] In an embodiment, the input brake cable 106 penetrates through the cable adjuster 132 and through the at least one first through hole 128 formed in the first end surface 126a of the chamber 126 and connects with the pulley holder 124. In an embodiment, the synchronization assembly 108 includes the pulley holder 124. In an embodiment, the pulley holder 124 includes the pulley 110. In an embodiment, the pulley holder 124 is housed in the slider 112. In an embodiment, the pulley holder 124 is configured to slide within the slider 112. In an embodiment, the pulley 110 is configured to slide as well as rotate about its central axis (not shown). The pulley 110 includes the at least one string 114 to actuate a rotational movement. However, it is also within the scope of the invention to provide at least one string 114 which is of a circular shape, with a groove around to accommodate a cable, without otherwise deterring the intended function of the transmission as can be deduced from this description and corresponding drawings.
[0026] In an embodiment, the synchronization assembly 108 includes the at least one string 114 disposed in the pulley 110. In an embodiment, the at least one string 114 includes a first end 114a and a second end 114b. In an embodiment, the at least one string 114 is selected from a group consisting of wire, rope, rigid links and combination thereof.
[0027] In an embodiment, the synchronization assembly 108 includes the front brake force multiplier 116 connected to the first end 114a of the at least one string 114. In an embodiment, the synchronization assembly 108 further includes the rear brake force multiplier 118 connected to the second end 114b of the at least one string 114. In an embodiment, the synchronization assembly 108 includes the first output cable 120 connected to the front brake force multiplier 116 and the second output cable 122 connected to the rear brake force multiplier 118.
[0028] In an embodiment, the front brake force multiplier 116, and the rear brake force multiplier 118 are cantilever pivoted links having a provision to hook the at least one string 114 from the pulley 110 to the first output cable 120 to front wheel brake and the second output cable 122 to rear wheel brake by means of a front brake cam (not shown) and a rear brake cam (not shown) respectively with front brake cam corner radius (not shown) and a rear brake cam corner radius (not shown) designed to accommodate for predetermined force and travel requirement of both the front wheel brake and the rear wheel brake.
[0029] In an embodiment, when a braking force is applied through the rear brake lever 104, the input brake cable 106 through the cable adjuster 132 operates the pulley 110 through the pulley holder 124 to slide within the slider 112 in a linear manner. The pulley 110 is configured to slide as well as rotate about its axis. The wire rope 114 is connected to the front brake force multiplier 116, and the rear brake force multiplier 118. In an embodiment, the at least one string 114 is connected to the front brake force multiplier 116, and the rear brake force multiplier 118 at a predetermined distance. In an embodiment, the at least one string 114, and the front brake force multiplier 116 and the rear brake force multiplier 118 are connected in a predetermined manner to receive force multiplication through a prearranged link mechanism.
[0030] In an embodiment, the first output cable 120 and the second output cable 122 from the synchronization assembly 108 are passed to the respective the front wheel brake and the rear wheel brake.
[0031] In an embodiment, when the braking force is applied by actuating at least one of the front wheel brake lever 102 and the rear wheel brake lever 104, the applied braking force is distributed between the front wheel brake and the rear wheel brake. The braking force is distributed between the front wheel brake and the rear wheel brake such that it achieves maximum deceleration.
[0032] In an embodiment, the front brake force multiplier 116 and the rear brake force multiplier 118 are mounted within the synchronization assembly 108 at a predetermined angle “a”. Further, in an embodiment, the pulley 110 rotates and accommodates if there is any change in the leverage installed angle “a” due to uneven break wear in the front brake and rear brake.
[0033] In an embodiment, the front wheel and the rear wheel are provided with at least one brake shoe for applying brake when operated by either of the front brake lever 102, and the rear brake lever 104. The brake shoe wears, due to friction in contacting surfaces of the brake shoe and the wheel. In an embodiment, the brake shoe wear in the front wheel and the rear wheel is assisted through rotation of pulley 110 for a predetermined degree about its central axis.
[0034] In an embodiment, the combined brake system 100 is utilized for drum brake system. However it is also within the scope of the embodiment that the combined braking system 100 can be modified to be used for disc brakes of front and rear wheels without otherwise deterring the intended function of the brake force transmission as can be deduced from this description and corresponding drawings.
[0035] FIG. 3 depicts a flowchart of a method of actuating a combined braking system, according to an embodiment of the invention as disclosed herein. In an embodiment, a method 300 of actuating a combined braking system for a two- wheeled vehicle, the vehicle having a front end and a rear end is provided. At step 302, the method includes providing a front wheel brake lever 102 and a rear wheel brake lever 104 connected to the vehicle at the front end. At step 304, the method includes connecting an input brake cable 106 to at least one of the front wheel brake lever 102 and the rear wheel brake lever 104. At step 306, the method includes attaching a synchronization assembly 108 to the input brake cable 106. At step 308, the method includes actuating the synchronization assembly 108 by operating through a cable adjuster 132 the input brake cable 106 connected to at least one of the front wheel brake lever 102 and the rear wheel brake lever 104. In an embodiment, the synchronization assembly 108 is configured to distribute an applied braking force between a front wheel brake and a rear wheel brake.
[0036] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

,CLAIMS:CLAIMS
We claim,
1. A combined braking system 100 for a two- wheeled vehicle, the vehicle having a front end and a rear end, the combined braking system 100 comprising:
a front wheel brake lever 102 and a rear wheel brake lever 104 connected to the vehicle;
an input brake cable 106 connected to at least one of the front wheel brake lever 102 and the rear wheel brake lever 104; and
a synchronization assembly 108 connected to the input brake cable 106 through a cable adjuster 132,
wherein the synchronization assembly 108 is configured to distribute an applied braking force between a front wheel brake and a rear wheel brake; and
the cable adjuster 132 includes:
two right angle triangle shaped sliders (132a and 132b) configured to slide along their diagonal sides; and a compression spring 132c housed in between the two right angle triangle shaped sliders (132a and 132b) and configured to push the two right angle triangle shaped sliders (132a and 132b) apart by a predetermined force;
the synchronization assembly 108 includes:
a chamber 126 having a first end surface 126a, and a second end surface 126b,
the chamber 126 having at least one first through hole 128 and at least two second through hole 130 formed in the first end surface 126a and the second end surface126b respectively;
a portion of the input brake cable 106penetrating through the at least one first through hole128 formed in the first end surface 126a; a pulley holder 124 having a pulley 110 connected to the input brake cable 106 penetrating through the at least one first through hole 128;
at least one string 114 disposed in the pulley 110; wherein the at least one string 114 having a first end 114a and a second end 114b;
a front brake force multiplier 116 connected to the first end 114a of the at least one string 114;
a rear brake force multiplier 118 connected to the second end 114b of the at least one string 114;
a first output cable 120 connected to the front brake force multiplier 116; and
a second output cable 122 connected to the rear brake force multiplier 118.
2. The combined braking system 100 as claimed in claim 1, wherein the pulley holder 124 is housed in a slider 112 and configured to slide within the slider 112.
3. The combined braking system 100 as claimed in claim 1, wherein the at least one string 114, and the front brake force multiplier 116 and the rear brake force multiplier 118 are connected in a predetermined manner to receive force multiplication through a prearranged link mechanism.
4. The combined braking system 100 as claimed in claim 1, wherein the front brake force multiplier 116, and the rear brake force multiplier 118 are cantilever pivoted links having a provision to hook the at least one string 114 from the pulley 110 to the first output cable 120 to a front wheel brake and the second output cable 122 to a rear wheel brake by means of a front brake cam and a rear brake cam respectively with front brake cam corner radius and a rear brake cam corner radius designed to accommodate for predetermined force and travel requirement of both the front wheel brake and the rear wheel brake.
5. The combined braking system 100 as claimed in claim 1, wherein the front brake force multiplier 116 and the rear brake force multiplier 118 are mounted at a predetermined angle “a” in the synchronization assembly 108.
6. The combined braking system 100 as claimed in claim 1, wherein the pulley 110 is configured to slide as well as rotate about its central axis.
7. A method 300 of actuating a combined braking system for a two- wheeled vehicle, the vehicle having a front end and a rear end, the method 300 comprising steps of :
providing a front wheel brake lever 102 and a rear wheel brake lever 104 connected to the vehicle at the front end;
connecting an input brake cable 106 to at least one of the front wheel brake lever 102 and the rear wheel brake lever 104;
attaching a synchronization assembly 108 to the input brake cable 106; and actuating the synchronization assembly 108 by operating the input brake cable 106 through a cable adjuster 132 connected to at least one of the front wheel brake lever 102 and the rear wheel brake lever 104,wherein the synchronization assembly 108 is configured to distribute an applied braking force between a front wheel brake and a rear wheel brake; and the cable adjuster 132 includes:
two right angle triangle shaped sliders (132a and 132b) configured to slide along their diagonal sides; and
a compression spring 132c housed in between the two right angle triangle shaped sliders (132a and 132b) and configured to push the two right angle triangle shaped sliders (132a and 132b) apart by a predetermined force;
the synchronization assembly 108 includes:
a chamber 126 having a first end surface 126a, and a second end surface 126b,
the chamber 126 having at least one first through hole 128 and at least two second through hole 130 formed in the first end surface 126a and the second end surface 126b respectively;
a portion of the input brake cable 106penetrating through the at least one first through hole 128 formed in the first end surface 126a;
a pulley holder 124 having a pulley 110 connected to the input brake cable 106 penetrating through the at least one first through hole 128;
at least one string 114 disposed in the pulley 110; wherein the at least one string 114 having a first end 114a and a second end 114b;
a front brake force multiplier 116 connected to the first end 114a of the at least one string 114;
a rear brake force multiplier 118 connected to the second end 114b of the at least one string 114;
a first output cable 120 connected to the front brake force multiplier 116; and
a second output cable 122 connected to the rear brake force multiplier 118.
8. The method as claimed in claim 7, wherein the pulley holder 124 is housed in a slider 112 and configured to slide within the slider 112.
9. The method as claimed in claim 7, wherein the at least one string 114, and the front brake force multiplier 116 and the rear brake force multiplier 118 are connected in a predetermined manner to receive force multiplication through a prearranged link mechanism.
10. The method as claimed in claim 7, wherein the front brake force multiplier 116, and the rear brake force multiplier 118 are cantilever pivoted links having a provision to hook the at least one string 114 from the pulley 110 to the first output cable 102 to a front wheel brake and the second output cable 122 to a rear wheel brake by means of a front brake cam and a rear brake cam respectively with front brake cam corner radius and a rear brake cam corner radius designed to accommodate for predetermined force and travel requirement of both the front wheel brake and the rear wheel brake.