WO2019138428A1

WO2019138428A1 - Speed deceleration system of vehicle

Info

Publication number: WO2019138428A1
Application number: PCT/IN2019/050028
Authority: WO
Inventors: Ulrich Dumm; Deependra SINGH SHEKHAWAT; Ramanuj Vishwakarma; Vinit VIJAY DESHPANDE; Ankush SHARMA
Original assignee: Hero MotoCorp Limited
Priority date: 2018-01-12
Filing date: 2019-01-11
Publication date: 2019-07-18

Abstract

A speed deceleration system (200) includes, a brake linkage mechanism (L) having a first link (30), a second link (31), a third link (32), and a fourth link (33); a pedal (19) is rotatably coupled to a first link (30) and a second link (31) at a first pivot point (O1), a first link (30) and a third link (32) are rotatably coupled to each other by a second pivot point (O2), a second link (31) and a fourth link (33) are rotatably coupled to each other at a third pivot point (O3), a third link (32), a fourth link (33) and a second brake force transmitting member (21) are rotatably coupled to each other by a fourth pivot point (O4), an imaginary axis line X1 passing through the second pivot point (O2) and the third pivot point (O3) wherein, the first pivot point (O1) and the fourth pivot point (O4) lie on same side of the line X1.

Description

SPEED DECELERATION SYSTEM OF VEHICLE

FIELD OF THE INVENTION:

The present invention relates to vehicle, and more particularly to speed deceleration system of vehicle.

BACKGROUND:

Conventionally in two wheeled vehicles, braking operation of a front wheel is actuated by application of force on a front wheel brake actuating means provided on the handle bar and braking operation of a rear wheel is actuated by application of force on a rear wheel brake actuating means. The rear wheel brake actuating means is provided either on the handlebar or on a foot pedal. The operation of the front and rear wheel braking is normally controlled by an operator, independently and sometimes simultaneously.

For safe braking of the vehicle, the balanced actuation of the front and rear wheel brakes is necessary. If only rear wheel brake is applied, deceleration of the vehicle is insufficient to efficiently stop the vehicle in a shorter distance. If only the front wheel brake is applied, vehicle may face unsecured steering and leads to an accident if the front wheel gets lock. If both the front and rear wheel brakes are applied simultaneously such that both the wheels get locked, then the vehicle faces imminent danger of accident.

Braking systems are available as shows in Russian patent no. RU2397909C1 which combines front and rear wheel brakes (1 & 2) by foot work member (3) to distribute brake force to front and rear wheel brakes for braking, this type of braking systems are able to stop the vehicle in a shorter distance but not safe as there is a possibility of locking of front wheel before the rear wheel, as conventional braking systems are not able to distribute braking force to the front and rear in varying proportion for effective and safe braking condition, thus rider faces an unsafe braking experience.

SUMMARY:

In one aspect of the present invention, a two wheeled vehicle (100) is provided. The two wheeled vehicle (100) comprises a body frame (1), a first wheel (4), a second wheel (8) and a speed deceleration system (200). The speed deceleration system (200) comprises a first brake device (22) configured to apply brake on the first wheel (4), a second brake device (23) configured to apply brake on the second wheel (8). The speed deceleration system (200) also comprises a first brake force transmitting member (20) having a front end (20a) and a rear end (20b), the first brake force transmitting member (20) at front end (20a) operatively coupled to the first brake device (22), the first brake force transmitting member (20) comprises an inner wire (W) and a casing (C). The speed deceleration system (200) further comprises a second brake force transmitting member (21) having a first end (2 la) and a second end (2lb), the first end (2la) operatively coupled to the second brake device (23). The speed deceleration system (200) comprises a brake pedal (19) rotatably mounted to the body frame (1), the brake pedal comprising a pedal first end (l9a) and a pedal second end (l9b). The speed deceleration system (200) also comprises a brake linkage mechanism (L) operatively coupled to the rear end (20b) of the first brake force transmitting member (20) and second end (2lb) of the second brake force transmitting member (21). The brake linkage mechanism (L) comprises a first link (30) having a first link first end (30a), a first link second end (30b) and a first link third end (30c). The brake linkage mechanism (L) also comprises a second link (31) having a second link first end (3 la), a second link second end (3 lb) and a second link third end (3 lc). The pedal second end (l9b) rotatably coupled to the first link second end (30b) and second link second end (3 lb) using a first pivot pin (Pl) to form a first pivot point (01). The brake linkage mechanism (L) further comprises a third link (32) having a third link first end (32a) and a third link second end (32b), the third link first end (32a) rotatably coupled to the first link first end (30a) using a second pivot pin (Pl) to form a second pivot point (02). The brake linkage mechanism (L) comprises a fourth link (33) having a fourth link first end (33 a) and a fourth link second end (33b). The second link first end (3 la) rotatably coupled to the fourth link first end (33a) using a third pivot pin (P3) to form a third pivot point (03). The third link second end (32b) rotatably coupled to the fourth link second end (33b) and the second end (2 lb) of the second brake force transmitting member (21) using a fourth pivot pin (P4) to form a fourth pivot point (04). The first pivot point (01) and the fourth pivot point (04) lie on same side of the line passing through the second pivot point (02) and the third pivot point (03).

As per present invention, for ideal braking situation; in two wheeler, it is required to apply braking in rear wheel first and then gradually more front wheel braking required than the rear wheel, thus variable brake force distribution of front and rear wheel is required, in present configuration of speed deceleration system (200) it is possible to achieve variable first and second brake force distribution, that optimize front - rear brake force distribution near to ideal front - rear brake force distribution and improve brake effectiveness.

In an embodiment, the inner wire (W) at the rear end (20b) of the first brake force transmitting member (20) coupled to the second link third end (3lc) of the second link (31).

In an embodiment, the casing (C) at the rear end (20b) of the first brake force transmitting member (20) abuts against the first link third end (30c) of first link (30).

In an embodiment, upon actuation of the brake pedal (19), the brake linkage mechanism (L) moves ahead, thereby actuating the second brake device (23) and sequentially actuating the first brake device (22) by relative movement of the inner wire (W) with respect to the casing (C) caused by outward movement of the first link third end (30c) of first link (30) and the second link third end (3lc) of second link (31) with each other.

The present invention advantageously provide the speed deceleration system (200), where the bending of the first brake force transmitting member (20) is not required that leads to improvement in effectiveness of front wheel braking.

In an embodiment, the brake linkage mechanism (L) comprises a stopper (S) having a stopper first end (Sl) pivotally coupled to at least one of the brake pedal (19), first link (30), first pivot pin (Pl) and second link (31) and a stopper second end (S2) slidably coupled to at least one of the second brake force transmitting member (21), third link (32), fourth link (33) and fourth pivot pin(P4).

In an embodiment, the stopper second end (S2) slidably coupled through an elongated opening (S2’) having an opening first end (Bl) and an opening second end (B2).

In an embodiment, when the at least one of the second brake force transmitting member (21), third link (32), fourth link (33) and fourth pivot pin (P4) touches the opening second end (B2) then, the stopper (S) is restricted from moving forward thereby limiting further outward movement of the first link third end (30c) of first link (30) and the second link third end (3lc) of the second link (31). The present invention has a stopper (S) that limits front wheel braking when rider applies excessive force on the brake pedal (19), moreover in front fail condition (when inner wire of the front brake cable is broken) the stopper (S) act as a failsafe device by actuating atleast one brake device to decelerate the vehicle.

In an embodiment, the first link comprises a resting member (R) having a resting first end (Rl) and a resting second end (R2), the resting first end (Rl) comprises a resting surface (Rt) and an opening (Rl’), the second end (R2) operatively coupled to the first link third end (30c) of the first link (30), wherein, the casing (C) of the first brake force transmitting member (21) abutted against the resting surface (Rt) and the inner wire (W) passes through the opening (Rl’) and coupled to the second link third end (3 lc) of the second link (31).

In an embodiment, the first brake device (22) and the second brake device (23) is at least one of a mechanical brake device or a hydraulic brake device.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:

The invention itself, together with further features and attended advantages, will become apparent from consideration of the following detailed description, taken in conjunction with the accompanying drawings. One or more embodiments of the present invention are now described, by way of example only wherein like reference numerals represent like elements and in which:

Figure 1 illustrates a side view of vehicle incorporating speed deceleration system, according to an embodiment of the present invention;

Figure 2 illustrates layout of speed deceleration system in the vehicle, according to an embodiment of the present invention;

Figures 3a & 3b illustrate views of brake pedal with brake linkage mechanism, according to an embodiment of the present invention;

Figures 4a & 4b illustrate views of first link, according to an embodiment of the present invention;

Figures 5a, 5b & 5c illustrate views of second link, according to an embodiment of the present invention;

Figures 6a, 6b & 6c illustrate views of third link, according to an embodiment of the present invention; Figures 7a, 7b & 7c illustrate views of fourth link, according to an embodiment of the present invention;

Figures 8a & 8b illustrate views of stopper, according to an embodiment of the present invention;

Figures 9a & 9b illustrate views of resting member, according to an embodiment of the present invention;

Figures lOa, lOb, lOc & lOd illustrate successive braking, according to an embodiment of the present invention;

Figure 11 illustrates front fail situation of speed deceleration system, according to an embodiment of the present invention;

Figure 12 illustrates brake characteristic curves of front and rear brake force distribution, according to an embodiment of the present invention.

The drawings referred to in this description are not to be understood as being drawn to scale except if specifically noted, and such drawings are only exemplary in nature. The coloured drawings, if provided along with this description are only meant to make the details of invention clear and have no effect whatsoever on the scope of the invention.

DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS AND

PREFERRED EMBODIMENT:

While the invention is susceptible to various modifications and alternative forms, an embodiment thereof has been shown by way of example in the drawings and will be described here below. It should be understood, however that it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the invention is to cover all modifications, equivalents and alternative falling within the spirit and the scope of the invention.

The terms“comprises”,“comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by“comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.

For the better understanding of this invention, reference would now be made to the embodiment illustrated in the accompanying Figures and description here below, further, in the following Figures, the same reference numerals are used to identify the same components in various views.

The terms“front / forward”,“rear / rear / back / backward”,“up / upper / top / upward”, “down / downward / lower / lowerward”,“left / leftward”,“right / rightward” used therein represents the directions as seen from a vehicle driver sitting astride and these directions are referred by arrows Fr, Rr, U, Lr, L, R in the drawing Figures.

While the present invention is illustrated in the context of a saddle riding type vehicle, however speed deceleration system thereof can be used with other type of vehicles as well. It is to be noted that terms such as“two wheeled vehicle” and“vehicle” are interchangeably used throughout the description. The term“two wheeled vehicle” includes vehicles such as motorcycles, scooters, bicycles, mopeds, scooter type vehicle, all-terrain vehicles (ATV) and the like.

Figure 1 illustrates a schematic side view of a two wheeled vehicle (100) of conventional construction employing the present invention in the two wheeled vehicle (100), the two wheeled vehicle (100) comprising one or more body parts, such as body frame (1), front forks (2), handle bar (3), first wheel (4), seat (5), rear grip (6), rear cushion (7), second wheel (8), engine (9), headlight (10), fuel tank (11), tail light (12), front fender (13), rear fender (14), steering stem (15), top bridge (l6a), bottom bridge (l6b), swing arm (17), chain transmission mechanism (18), brake pedal (19), first brake force transmitting member (20), second brake force transmitting member (21), first brake device (22), second brake device (23) and brake linkage mechanism (L). It may be noted that the two wheeled vehicle (100) is shown to have include above stated parts, however those ordinarily skilled in the art would appreciate that the two wheeled vehicle (100) includes other parts which may not be relevant for explaining the present invention and hence are not shown and described.

The two wheeled vehicle (100) shown in Figure 1, a first wheel (4) is journaled to lower ends of left and right front forks (2). Upper portions of the left and right front forks (2) are steerably pivotally supported through a steering stem (15) and a top bridge (l6a) by a head pipe (HP) located at a front end of a body frame (1). A steering handle bar (3) is mounted on the top bridge (l6a). A front fender (13) is supported between the left and right front forks (2).

A second wheel (8) of the two wheeled vehicle (100) is journaled to a rear end of a swing arm (17) that extends in a front-rear direction on the two wheeled vehicle (100) rear lower side. A front end of the swing arm (17) is pivotally supported in a vertically swingable manner by a pivot pipe (50) located at a lower portion of the body frame (1). The second wheel (8) is linked to an engine (9) through a chain transmission mechanism (18) disposed on the vehicle rear left side.

Figure 2 illustrates schematic layout of a speed deceleration system (200), the speed deceleration system (200) comprises a brake pedal (19), brake linkage mechanism (L), a stopper (S) (Not shown), a first brake force transmitting member (20), a second brake force transmitting member (21), a first brake device (22) and a second brake device (23).

Figures 3a & 3b illustrate schematic views of the brake pedal, the brake pedal (19) is rotatably mounted on the body frame (1) and has two ends, a pedal first end (l9a) and a pedal second end (l9b). The pedal first end (l9a) of the brake pedal (19) is the end where rider places his foot and applies force to actuate the speed deceleration system (200). The pedal second end (l9b) of the brake pedal (19) are operatively coupled to the brake linkage mechanism (L).

Figures 2, 3a & 3b illustrate schematic layout of the speed deceleration system (200), wherein brake linkage mechanism (L) comprises a first link (30), a second link (31), a third link (32) and a fourth link (33).

The first link (30) as illustrated in Figures 4a & 4b is a plate like member, which has three ends as a first link first end (30a), a first link second end (30b) and a first link third end (30c) and each end has one through opening (30p), (30q) & (30r) respectively for connection with other parts.

The second link (31) as illustrated in Figures 5a, 5b & 5c is a plate like member, it has a second link first end (3 la), a second link second end (3 lb) and a second link third end (3lc), each end has through opening (3lp), (3lq) & (3lr) respectively for connection with other parts, The second link (31) has two parts, as a first part (3 G) and a second part (31”), which are parallel to each other and joins together in such a way that it creates gap between the first part (3 G) and the second part (31”).

The third link (32) as illustrated in Figures 6a, 6b & 6c is a plate like member, which made by joining a first part (32’) and a second parts (32”) to each other in such a way that one side of both the parts are joined together and other side of the second part (32”) is bent outwardly from first part in such a way that it creates a gap between the first part (32’) and the second parts (32”), the third link (32) has a third link first end (32a) and a third link second ends (32b), each end has through opening (32p) & (32q) respectively for connection with other parts.

The fourth link (33) as illustrated in Figures 7a, 7b & 7c is a plate like member, which is made by joining two parts i.e. a first part (33’) and a second part (33”) side by side with each other, both the parts have a first, a second and a third ends (33’a, 33’b, 33’c) & (33”a, 33”b, 33”c) respectively, the second end of first part (33’b) is bent outwardly from the third end (33’c), similarly the second end of second part (33”b) is bent towards the second end (32’b) of the first part (33’), both the parts (33’ & 33”) are joined together from the second end and the third end of both the parts (33’b, 33’c) & (33”b, 33”c) in such a way that it creates a gap between the second end and the third end of the fourth link (33), moreover the first end (33”a) of second part (33”) is bent outwardly from the first part (33’) to create a gap in between the first and the second part (33’ & 33”). The fourth link (33) has two ends, a fourth link first end (33a) and a fourth link second end (33b) with through opening (33p) & (33q) respectively provided for connection with other parts.

A stopper (S) as illustrated in Figures 8a & 8b is a plate like member; it has two ends, a stopper first end (Sl) and a stopper second end (S2), wherein the stopper second end (S2) is bent outwardly from the stopper first end (Sl). The stopper first end (Sl) has a through opening (Sl’) for connection with other parts, furthermore the stopper second end (S2) has an elongated through opening (S2’) for slidable connection with other parts. The elongated opening (S2’) has an opening first end (Bl) and an opening second end (B2). A resting member (R) as illustrated in Figure 9a & 9b has two ends i.e. a resting first end (Rl) and a resting second end (R2), wherein the resting first end (Rl) is a rectangular box like shape which has a top surface (Rt) and a side surface (Rs); the top surface (Rt) has an opening (R F) and the side surface (Rs) has an opening (Rl”); the resting second end (R2) is a circular shaft like portion with an trough opening (R2’) at the end.

As illustrated in Figures 2, 3a & 3b schematic layout of speed deceleration system (200), the pedal second end (l9b) of the brake pedal (19) is rotatably coupled to the first link second end (30b) and the second link second end (3 lb) at a first pivot point (01) by the first pivot pin (Pl) in such a way that the pedal second end (l9b) of the brake pedal (19) is disposed in between the first link second end (30b) and the second link second end (3 lb). A first link first end (30a) of the first link (30) and the third link first end (32a) of the third link (32) are rotatably coupled to each other at the second pivot point (02) by the second pivot pin (P2) in such a way that the first link first end (30a) of the first link (30) is disposed in between the first part (32’) and the second part (32”) at the third link first end (32a) of the third link (32). the second link first end (3 la) of the second link (31) and the fourth link first end (33a) of the fourth link (33) are rotatably coupled to each other at the third pivot point (03) by the third pivot pin (P3) in such a way that the first part (3 F) of the second link (31) is disposed in between the first part (33’) and the second part (33”) at the fourth link first end (33a) of the fourth link (33). A third link second end (32b) of the third link (32), a fourth link second end (33b) of the fourth link (33) and a second brake force transmitting member (21) are rotatably coupled to each other at the fourth pivot point (04) by a fourth pivot pin (P4), an imaginary axis line XI passing through the second pivot point (02) and the third pivot point (03), wherein the first pivot point (01) and the fourth pivot point (04) lie on same side of the line XI passing through the second pivot point (02) and the third pivot point (03).

The resting member (R) is pivotally coupled to the first link third end (30c) of the first link (30) in such a way that the circular shaft portion (R2) is passes through the opening (30q), furthermore a restricting part (40) is provided at the end of the circular shaft portion (R2) of the resting member (R) in such a way that the restricting part (40) passes through the opening (R2’) and restrict the resting member (R) to come out from the opening (30q) of the first link (30). A first brake force transmitting member (20) is a brake cable has a casing (C) and an inner wire (W); the first brake force transmitting member (20) has a front end (20a) and a rear end (20b), wherein the front end (20a) of the first brake force transmitting member (20) thereof is operatively coupled to the first brake device (22) to decelerate the first wheel (4), the rear end (20b) of the first brake force transmitting member (20) thereof is coupled to the brake linkage mechanism (L) in such a way that the casing (C) of the first brake force transmitting member (20) is abutted on the top surface (Rt) of the resting member (R), furthermore the inner wire (W) is passes through the opening (RF) and couples to the second link third end (3 lc) of the second link (31) to an opening (3lq).

A second brake force transmitting member (21) is a brake rod, it has two ends i.e. a first end (2 la) and a second end (2 lb), wherein the first end (2 la) thereof is operatively coupled to the second brake device (23) to decelerate the second wheel (8), the second end (2 lb) thereof of the second brake force transmitting member (21) is pivotally coupled to the third link second end (32b) of the third link (32) and the fourth link second end (33b) of the fourth link (33) at the fourth pivot point (04), furthermore in an embodiment the stopper (S) has the stopper first end (Sl) which is pivotally coupled to the first link second end (30b) of the first link (30), the second link second end (3 lb) of the second link (31) and the pedal second end (l9b) of the brake pedal (19) at the first pivot point (01); in an embodiment the stopper second end (S2) is slidably coupled to the fourth pivot point (04) in such a way that the fourth pivot point (04) is passes through the elongated opening (S2’) provided at the stopper second end (S2) of the stopper (S).

Figures (lOa), (lOb), (lOc) & (lOd) illustrated successive braking, Figure (lOa) shows initial stage of the brake pedal (19) in no load condition, when rider not pressing the brake pedal (19), Figure (lOb) shows successive stage of brake pedal (19), when rider starts pressing the brake pedal (19) downward, the brake linkage mechanism (L) starts moving forward as the first link third end (30c) of the first link (30) and the second link third end (3lc) of the second link (31) are not moving outward with each other, thus only the second brake device (23) gets actuated by the second brake force transmitting member (21) to decelerate the second wheel (8). Figure (lOc) shows successive stage of brake pedal (19), when rider further press the brake pedal (19) downwardly, the brake linkage mechanism (L) moves little further and the first link third end (30c) of the first link (30) and the second link third end (3lc) of the second link (31) are starts moving outward with each other, thus the first brake device (22) gets actuated by the first brake force transmitting member (20) along with the second brake device (23) by the second brake force transmitting member (21) for proportionate declaration of the front and the rear wheel. Figure (lOd) shows last stage of brake pedal (19), when rider pressed the brake pedal (19) completely, the first link third end (30c) of the first link (30) and the second link third end (3lc) of the second link (31) moved outward with each other completely, thus the first brake device (22) and the second brake devices (23) actuated by the first and the second brake force transmitting member (20) & (21) for optimize proportionate braking of the first and the second wheel (4) & (8), furthermore more the front wheel braking not possible, as the stopper (S) completely moved forward, thus the fourth pivot point (04) slides on the elongated opening (S2’) and rests at the opening second end (B2) of the elongated opening (S2’), therefore further forward movement of the stopper (S) not possible, thus outward movement of the first link third end (30c) of the first link (30) and the second link third end (3lc) of the second link (31) gets restricted by the stopper (S), as the stopper first end (Sl) of the stopper (S) is in connection with the brake pedal (19) at the first pivot point (01), this restricts further first wheel braking; thus, the stopper (S) acts as a front limiter to avoid first wheel locking due to excessive braking.

Figure (11) illustrates a front fail condition of the speed deceleration system (200), i.e. in the case when the first brake force transmitting member (20) fails and if rider applies force on the brake pedal (19), the rear brake still works; to achieve this, the stopper (S) is provided in connection with the first pivot point (01) and the fourth pivot point (04), when rider presses the brake pedal (19) in front fail condition (When an inner wire (W) of the first brake force transmitting member (20) is damaged) the stopper (S) moves forward, thus the fourth pivot point (04) slides on the elongated opening (S2’) and rests at the opening second end (B2) of the elongated opening (S2’), as no load from the first wheel (4), furthermore forward movement of the stopper (S) possible, this allows atleast the second brake device (23) actuation by the second brake force transmitting member (21) for the second wheel braking, in the front fail condition and enhance safety in the vehicle, thus the stopper (S) also act as a failsafe device.

Figure 12 illustrates a brake characteristic curve of optimized brake force distribution as per present invention for ideal braking situation in two wheeler, it is required to apply braking force in the rear wheel first and then gradually more front wheel braking is required than the rear wheel (refer curve“I”), thus variable brake force distribution of the front and the rear wheel is required, in present configuration of the speed deceleration system (200) it is possible to achieve variable first and second brake force distribution, that optimize the front - rear brake force distribution near to ideal front - rear brake force distribution (refer curve “O”) and improve brake effectiveness.

While few embodiments of the present invention have been described above, it is to be understood that the invention is not limited to the above embodiments and modifications may be appropriately made thereto within the spirit and scope of the invention.

While considerable emphasis has been placed herein on the particular features of this invention, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the invention. These and other modifications in the nature of the invention or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

Claims

We Claim:

1) A two- wheeled vehicle (100) comprising:

a body frame (1);

a first wheel (4);

a second wheel (8); and

a speed deceleration system (200) comprising:

a first brake device (22) configured to apply brake on the first wheel (4);

a second brake device (23) configured to apply brake on the second wheel (8); a first brake force transmitting member (20) having a front end (20a) and a rear end (20b), the first brake force transmitting member (20) at front end (20a) operatively coupled to the first brake device (22), the first brake force transmitting member (20) comprises an inner wire (W) and a casing (C);

a second brake force transmitting member (21) having a first end (2 la) and a second end (2lb), the first end (2 la) operatively coupled to the second brake device (23);

a brake pedal (19) rotatably mounted to the body frame (1), the brake pedal comprising a pedal first end (19a) and a pedal second end (19b); and

a brake linkage mechanism (L) operatively coupled to the rear end (20b) of the first brake force transmitting member (20) and second end (21b) of the second brake force transmitting member (21), the brake linkage mechanism (L) comprising:

a first link (30) having a first link first end (30a), a first link second end (30b) and a first link third end (30c);

a second link (31) having a second link first end (31a), a second link second end (31b) and a second link third end (31c), wherein the pedal second end (19b) rotatably coupled to the first link second end (30b) and second link second end (31b) using a first pivot pin (PI) to form a first pivot point (Ol);

a third link (32) having a third link first end (32a) and a third link second end (32b), the third link first end (32a) rotatably coupled to the first link first end (30a) using a second pivot pin (PI) to form a second pivot point (O2) ; a fourth link (33) having a fourth link first end (33 a) and a fourth link second end (33b), wherein the second link first end (3 la) rotatably coupled to the fourth link first end (33 a) using a third pivot pin (P3) to form a third pivot point (03), wherein the third link second end (32b) rotatably coupled to the fourth link second end (33b) and the second end (2 lb) of the second brake force transmitting member (21) using a fourth pivot pin (P4) to form a fourth pivot point (04);

wherein the first pivot point (01) and the fourth pivot point (04) lie on same side of the line passing through the second pivot point (02) and the third pivot point (03).

2) The two- wheeled vehicle (100) as claimed in claim 1, wherein the inner wire (W) at the rear end (20b) of the first brake force transmitting member (20) coupled to the second link third end (3lc) of the second link (31).

3) The two- wheeled vehicle (100) as claimed in claim 1, wherein the casing (C) at the rear end (20b) of the first brake force transmitting member (20) abuts against the first link third end (30c) of first link (30).

4) The two- wheeled vehicle (100) as claimed in claim 2 and claim 3, wherein upon actuation of the brake pedal (19), the brake linkage mechanism (L) moves ahead, thereby actuating the second brake device (23) and sequentially actuating the first brake device (22) by relative movement of the inner wire (W) with respect to the casing (C) caused by outward movement of the first link third end (30c) of first link (30) and the second link third end (3lc) of second link (31) with each other.

5) The two- wheeled vehicle (100) as claimed in claim 1, wherein the brake linkage mechanism (L) comprises a stopper (S) having a stopper first end (Sl) pivotally coupled to at least one of the brake pedal (19), first link (30), first pivot pin (Pl) and second link (31) and a stopper second end (S2) slidably coupled to at least one of the second brake force transmitting member (21), third link (32), fourth link (33) and fourth pivot pin(P4). 6) The two- wheeled vehicle (100) as claimed in claim 5, wherein the stopper second end (S2) slidably coupled through an elongated opening (S2’) having an opening first end (Bl) and an opening second end (B2).

7) The two- wheeled vehicle (100) as claimed in claim 6, wherein when the at least one of the second brake force transmitting member (21), third link (32), fourth link (33) and fourth pivot pin (P4) touches the opening second end (B2) then, the stopper (S) is restricted from moving forward thereby limiting further outward movement of the first link third end (30c) of first link (30) and the second link third end (3lc) of the second link (31).

8) The two- wheeled vehicle (100) as claimed in claim 1, wherein the first link comprises a resting member (R) having a resting first end (Rl) and a resting second end (R2), the resting first end (Rl) comprises a resting surface (Rt) and an opening (Rl’), the second end (R2) operatively coupled to the first link third end (30c) of the first link (30), wherein, the casing (C) of the first brake force transmitting member (21) abutted against the resting surface (Rt) and the inner wire (W) passes through the opening (RT) and coupled to the second link third end (3lc) of the second link (31).

9) The two- wheeled vehicle (100) as claimed in claim 1, wherein the first brake device (22) and the second brake device (23) is at least one of a mechanical brake device or a hydraulic brake device.

Dated this 1 I^th day of January 2019.