DESC:FIELD OF INVENTION
The present invention relates to a combined braking system for automotive two wheeled vehicles, and more particularly it relates to a combined braking system for pedal brake with variable braking load for two wheeled vehicles.
BACKGROUND OF THE INVENTION
[0001] A brake is a mechanical device or apparatus in automobile vehicles, which inhibits motion by absorbing energy from the moving wheels of vehicle to decelerate the vehicle’s momentum for stopping of moving vehicle. A braking system plays a crucial role in improving efficiency of the vehicles and providing auto safety in terms of prevention of road accidents, particularly for high-speed vehicles.
[0002] Since the earliest automobiles, a gradual development has been carried out to provide an improved braking systems and methods for automotive vehicles. Since ancient time, various kinds of brakes i.e. wooden block brakes, mechanical brakes, expanding internal shoe brakes, mechanical brakes, hydraulic brakes, disc brakes, anti-lock brakes etc. have been gradually developed to meet the requirements of braking mechanism for vehicles in automobile industry.
[0003] In last few decades, a gradual evolution in automobile industry is being carrying out to provide an efficient braking system than that of the existing one. A pedal braking system plays a key role in two wheeled vehicles i.e. scooters, motorcycles etc.
[0004] A conventional mechanical pedal brake is defined to mean a braking system in which, when the brake pedal is pressed, the brake cable being pulled which causes the brake shoes to expand outwards and rub against the brake drum. Friction between the brake linings and the drum causes the drum to stop rotating; and thereby causing stoppage of the wheels. When the brake pedal is released, the retracting springs bring the brake shoes back to their original position. Thus, the mechanical pedal brake imparts a braking force by causing friction between the brake shoe and brake drum.
[0005] In two wheeled vehicles, such as scooters and motorcycles etc., conventionally there are two brakes provided, one is a hand brake which applies a brake load to the front wheel of the vehicle and another is a pedal brake which applies a brake load to the rear wheel of the vehicle in predefined ratio of brake load. However, such conventional pedal brake systems cause skidding of the vehicles due to undesirable locking of vehicles’ wheels.
[0006] Hence, said conventional mechanical pedal brake systems have been switched over by a combined braking system (CBS) to surpass the conventional braking effect. The term “combined braking system” in two-wheeled vehicles is understood to mean a braking system in which, when “a hand operated or a foot pedal” is operated, the front brake and the rear brake are applied simultaneously. Accordingly, by operating a single actuating device, both of the brakes, i.e. front brake and rear brake are applied at the same time.
[0007] Generally, a motorcycle having combined brake device is known in the art which can apply braking force to a front wheel along with the application of braking force to a rear wheel, when the rear brake is manipulated. However, said combined brake system could not be successful to provide an effective brake load to both of the wheels i.e. front wheel and rear wheel for achieving the minimum stopping distance by using the full road adhesion.
[0008] An important aspect of braking for stopping of the vehicle is the amount of braking load being transferred to the front and rear wheels. The combined braking system of two-wheelers helps to reduce the stopping distance by providing a higher percentage of braking power to the rear wheels.
[0009] Although, the conventional pedal brake systems are proved to be an advantageous, there is still room to improve the functionality and performance of the braking system for inducing an effective brake load to both of the wheels, i.e. front brake wheel and rear brake wheel simultaneously, by using a single brake-actuating medium i.e. a brake pedal. Hence, a need yet exists to switch the pedal brake system having an enhanced functionality and performance.
[00010] Therefore, it is desperately needed to develop a combined braking system for pedal brake with variable braking load which overcomes the aforesaid drawbacks and limitations of the prior art combined braking systems.

OBJECTS OF THE INVENTION
[00011] The main object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles.
[00012] Yet another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which is having less number of moving elements.
[00013] Yet another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which reduces frictional force required for smooth braking of wheels.
[00014] Another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which is having increased life span and cost effective.
[00015] Yet another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which improves performance and functionality of the braking system.
[00016] Yet another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which is simple in construction and design.
[00017] Yet another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which enhances safety of the vehicle as well as rider.
[00018] Yet another object of the present invention is to provide a combined braking system for pedal brake with variable braking load for two wheeled vehicles which overcomes the drawbacks and shortcomings of prior art braking systems.
SUMMARY OF THE INVENTION
[00019] A combined braking system (1) for pedal brake with variable braking load for two wheeled vehicles includes a brake pedal (2), a central pivot link (7), a rear brake mechanism (10) and a front brake mechanism (15). The central pivot link (7) is pivotably mounted on a bracket (16) through a central hinge point (H1), such that a first end (7a) of the central pivot link (7) configured with at least one guide slit (7S) that is pivotably connected to the front brake mechanism (15) and a second end (7b) the central pivot link (7) thereof configured with a fourth hinge point (H4) being pivotably connected to the rear brake mechanism (10). The brake pedal (2) having an upper rigid link (4) and a lower rigid link (5) such that the upper rigid link (4) is rigidly fixed to the brake pedal (2) in vertically upward manner and the lower rigid link (5) is rigidly fixed to the brake pedal (2) in downwardly inclined manner. The rear brake mechanism (10) includes a first pivot link (9) that is pivotably connected to the lower rigid link (5) through a sixth hinge point (H6), a second pivot link (8) that is pivotably connected to the first pivot link (9) and to the central pivot link (7) through a fifth hinge point (H5) and a fourth hinge point (H4) respectively. A rear transmission link holder (11) is pivotably connected to the second pivot link (8) through a third hinge point (H3), and a rear brake transmission link (12) mechanically connected to the rear transmission link holder (11). The front brake mechanism (15) includes a front cable connector (14) having a second hinge point (H2) configured to be guided through the guide slit (7S) of the central pivot link (7), a front brake cable (13) that is mechanically connected to the front cable connector (14). The guide slit (7S) of the central pivot link (7) is configured to act as a delay mechanism, that enables delay in actuation of the front brake mechanism (15) with respect to the rear brake mechanism (10). The second hinge point (H2) is movable along a guide-path of the guide slit (7S), whereas the central hinge point H1, the third hinge point H3, the fourth hinge point H4, the fifth hinge point H5 and the sixth hinge point H6 are static. The combined braking system (1) is configured to provide the variable braking load between the front wheel and the rear wheel of the two wheeled vehicles.

BRIEF DESCRIPTION OF THE DRAWINGS
[00020] Various other objects, features and many of the attendant advantages of the present invention will be understood by reference to the following detailed description of the preferred embodiment of the present invention when considered in connection with the accompanying drawings, in which:
[00021] Fig. 1 illustrates a perspective view of combined braking system for pedal brake with variable braking load for two wheeled vehicles according to a present invention; and
[00022] Fig. 2 is a front view of the combined braking system for pedal brake with variable braking load for two wheeled vehicles according to the present invention.
[00023] It should be noted that the figures are not drawn to scale and that elements of similar structures or functions are generally represented by like reference numerals for illustrative purposes throughout the figures. It also should be noted that the figures are only intended to facilitate the description of the preferred embodiments. The figures do not illustrate every aspect of the described embodiments and do not limit the scope of the present disclosure.
DETAILED DESCRIPTION OF THE INVENTION
[00024] The nature of the invention and the manner in which it works is clearly described in the complete specification. The invention has various embodiments and they are clearly described in the following pages of the complete specification. Before explaining the present invention, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation.
[00025] The nature of the invention and the manner in which it works is clearly described in the provisional specification. The invention has various embodiments and they are clearly described in the following pages of the provisional specification. Before explaining the present invention, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation.
[00026] Before explaining the present invention, it is to be understood that the term “combined braking system” is known in the art and refers to a braking system which manipulates a front brake mechanism and a rear brake mechanism simultaneously by using a single brake actuating means, i.e. a brake pedal or lever. Further, the term “front brake mechanism” refers to a front brake-linkages for actuating the front brake; and the term “rear brake mechanism” refers to a rear brake-linkages for actuating the rear brake.
[00027] The term “delay mechanism”, hereinafter described, being used for delay braking of the front brake wheel, which enables an initial manipulating of the rear brake mechanism and then after it actuates the front brake mechanism to eliminate skidding of wheels of the vehicles.
[00028] Now as shown in Fig.1, a combined braking system (1) according to the present invention includes a brake pedal (2), a central pivot link (7), a rear brake mechanism (10) and a front brake mechanism (15). The brake pedal (2) is provided with a pivot hole (3) to securely receive a pivot pin (not shown in figure) through which the brake pedal (2) being pivotably supported.
[00029] Referring to Fig. 2, a front view of the combined braking system (1) for pedal brake with variable braking load for two wheeled vehicles is shown. The brake pedal (2) having an upper rigid link (4) and a lower rigid link (5). The upper rigid link (4) is rigidly fixed to the brake pedal (2) in vertically upward manner and the lower rigid link (5) is rigidly fixed to the brake pedal (2) in downwardly inclined manner. The lower rigid link (5) is being mechanically connected to the rear brake mechanism (10).
[00030] Referring to Fig. 1 and Fig.2 collectively, a central pivot link (7), pivotably mounted on the bracket (16) through a central hinge point (H1), such that a first end (7a) of the central pivot link is configured with a guide slit (7S) being pivotably connected to the front brake mechanism (15) and a second end (7b) of the central pivot link (7b) configured with a fourth hinge point (H4) being pivotably connected to the rear brake mechanism (10). Further, the said guide slit (7S) of the central pivot link (7) is configured to act as a delay mechanism, which enables delay in actuation of the front brake mechanism (15) with respect to the rear brake mechanism (10).
[00031] Now again referring to Fig.1 and Fig. 2 collectively, the rear brake mechanism (10) includes a first pivot link (9) being pivotably connected to the lower rigid link (5) through a sixth hinge point (H6); a second pivot link (8) pivotably connected to the first pivot link (9) and the central pivot link (7) through a fifth hinge point (H5) and a fourth hinge point (H4) respectively; a rear transmission link holder (11) being pivotably connected to the second pivot link (8) through a third hinge point (H3); and a rear brake transmission link (12) being mechanically connected between the rear transmission link holder (11) and a rear brake (not shown in figure).
[00032] Further referring to Fig.1 and Fig. 2 collectively, the front brake mechanism (15) includes a front cable connector (14) having a second hinge point (H2) configured to be guided through the guide slit (7S) of the central pivot link (7); a front brake cable (13) having one end being mechanically connected between the front cable connector (14) and a front brake (not shown in figure).
[00033] In the preferred embodiment of the present invention the second hinge point (H2) is configured to be movable along a guide-path of the guide slit (7S); and the central hinge point (H1), the third hinge point (H3), the fourth hinge point (H4), the fifth hinge point (H5) and the sixth hinge point (H6) are immovable (static) that act as a fulcrum for pivoting of the central pivot link (7), the second pivot link (8), the first pivot link (9) and the rear transmission link holder (11).
[00034] Further continuous referring to Figs.1-2, the central pivot link (7) having guide slit (7S) is configured to provide a guide-path for the second hinge point (H2) of the front cable connector (14), that enables an initial actuation of the rear brake mechanism (10) and thereafter the front brake mechanism (15) is being actuated after termination of guiding of the second hinge point (H2) along the slit (7S). Thus, the combined braking system (1) for pedal brake of the present invention enables a delay braking of the front brake mechanism (5) due to guide path of the guide slit (7S).
[00035] In operational characteristics of the present invention, pressing of the brake pedal (2) causes the upper rigid link (4) and the lower rigid link (5) to be pulled for pulling of the rear brake cable (15) through the rear transmission link holder (11) to apply brake load to the rear wheel until the second hinge point (H2) is terminated into the guide slit (7S). Now when the second hinge point (H2) is terminated along the guide slit (7S), the front brake mechanism (15) is to be actuated that causes the front brake cable (13) to be pulled to apply brake load to the front wheel (not shown in Fig.). In this manner, the braking force is applied to the rear wheel first and thereafter the brake load is transferred to the front wheel with a single brake actuating means i.e. brake pedal (2).
[00036] The combined braking system (1) is configured to provide the variable braking load between the front wheel and the rear wheel.
[00037] The combined braking system of the present invention is cost effective with increased life span which reduces frictional force required for smooth braking of both of the wheels i.e. front wheel and rear wheel, due to less number of moving elements. Further, the combined braking system of the present invention is simple in construction, for assembly which improves the performance and functionality of the braking system and enhances safety of the rider.
[00038] The present invention has been described with reference to the specific embodiment, which is merely illustrative and not intended to limit the scope of the present invention as defined in the provisional specification.

[00039] List of reference numerals:
1. A combined braking system (1)
2. A brake pedal (2)
3. A pivot hole (3)
4. An upper rigid link (4)
5. A lower rigid link (5)
6. A central pivot link (7)
7. A first end (7a)
8. A second end (7b)
9. A second pivot link (8)
10. A first pivot link (9)
11. A rear brake mechanism (10)
12. A rear transmission link holder (11)
13. A rear brake transmission link (12)
14. A front brake cable (13)
15. A front cable connector (14)
16. A guide slit (7S)
17. A front brake mechanism (15)
18. A bracket (16)
19. A central hinge point (H1)
20. A second hinge point (H2)
21. A third hinge point (H3)
22. A fourth hinge point (H4)
23. A fifth hinge point (H5)
24. A sixth hinge point (H6)
,CLAIMS:We Claim:
1. A combined braking system (1) for pedal brake with variable braking load for two wheeled vehicles comprising:
A brake pedal (2);
A central pivot link (7);
A rear brake mechanism (10); and
A front brake mechanism (15).
2. The combined braking system (1) as claimed in claim 1, wherein the central pivot link (7) is pivotably mounted on a bracket (16) through a central hinge point (H1), such that a first end (7a) of the central pivot link (7) configured with at least one guide slit (7S) that is pivotably connected to the front brake mechanism (15) and a second end (7b) the central pivot link (7) thereof configured with a fourth hinge point (H4) being pivotably connected to the rear brake mechanism (10).
3. The combined braking system (1) as claimed in claim 1, wherein the brake pedal (2) having an upper rigid link (4) and a lower rigid link (5) such that the upper rigid link (4) is rigidly fixed to the brake pedal (2) in vertically upward manner and the lower rigid link (5) is rigidly fixed to the brake pedal (2) in downwardly inclined manner.
4. The combined braking system (1) as claimed in claim 1, wherein the rear brake mechanism (10) includes a first pivot link (9) that is pivotably connected to the lower rigid link (5) through a sixth hinge point (H6), a second pivot link (8) that is pivotably connected to the first pivot link (9) and to the central pivot link (7) through a fifth hinge point (H5) and a fourth hinge point (H4) respectively, a rear transmission link holder (11) being pivotably connected to the second pivot link (8) through a third hinge point (H3), and a rear brake transmission link (12) mechanically connected to the rear transmission link holder (11).
5. The combined braking system (1) as claimed in claim 1, wherein the front brake mechanism (15) includes a front cable connector (14) having a second hinge point (H2) that is configured to be guided through the guide slit (7S) of the central pivot link (7), and a front brake cable (13) that is mechanically connected to the front cable connector (14).
6. The combined braking system (1) as claimed in claim 1, wherein the guide slit (7S) of the central pivot link (7) is configured to act as a delay mechanism, that enables delay in actuation of the front brake mechanism (15) with respect to the rear brake mechanism (10).
7. The combined braking system (1) as claimed in claim 1, wherein the second hinge point (H2) is movable along a guide-path of the guide slit (7S).
8. The combined braking system (1) as claimed in claim 1, wherein the central hinge point (H1), the third hinge point (H3), the fourth hinge point (H4), the fifth hinge point (H5) and the sixth hinge point (H6) are static.