阅读说明：本技术 盘式制动组件 (Disc brake assembly ) 是由 P·拉威拉 W·克马修斯 S·莫汉 K·文卡塔曼加拉朱 B·A·拉吉普特 于 2020-03-31 设计创作，主要内容包括：本主题大体上涉及两轮车辆(1)。更具体地但非排他地,本主题涉及用于所述两轮车辆(1)的盘式制动组件(2)。制动盘(10)设置有以预定角度(α,β和γ)并位于预定位置处的多个椭圆形槽(30a,30b,30c)。借助于制动盘(10)的周边处的多个瓣状凹口(310到319),多个椭圆形槽(30a,30b,30c)收集来自制动片(50)的表面的每个点的碎片以改进制动过程。(The present subject matter generally relates to a two-wheeled vehicle (1). More particularly, but not exclusively, the present subject matter relates to a disc brake assembly (2) for said two-wheeled vehicle (1). The brake disc (10) is provided with a plurality of oblong grooves (30a, 30b, 30c) at predetermined angles (α, β and γ) and at predetermined positions. By means of a plurality of petal-shaped notches (310 to 319) at the periphery of the brake disc (10), a plurality of oblong-shaped grooves (30a, 30b, 30c) collect debris from each point of the surface of the brake pad (50) to improve the braking process.)

1. A saddle-ride type vehicle (1) comprising:

a wheel axle carrier (28);

an axle (21), the axle (21) being mounted on the axle bracket (28);

a hub (29 a);

a disc brake assembly (2), the disc brake assembly (2) comprising a brake disc (10), a brake caliper (23), and a brake pad (50), the brake disc (10) being mounted on the hub (29a), the brake pad (50) being mounted on the brake caliper (23),

the brake disk (10) is provided with a plurality of elliptical grooves (30a, 30b, and 30c) arranged at a predetermined angle and at a predetermined position, and the brake disk (10) is provided with a plurality of petal-shaped recesses (310 to 319) on the outer periphery.

2. A saddle-type vehicle (1) according to claim 1, wherein the plurality of major axes (a1, a2 and a3) of said plurality of oblong slots (30a, 30b and 30c) are arranged at predetermined angles (α, β and γ) with respect to a plurality of diameters (D1, D2 and D3) of said brake disc (10).

3. A saddle-type vehicle (1) according to claim 2, wherein said predetermined angles (a, β and γ) are substantially equal to each other.

4. The saddle-type vehicle (1) according to claim 1, wherein said predetermined angles (a, β and γ) formed by the major axes (a1, a2 and a3) of each of said plurality of oblong grooves (30a, 30b, 30c) and said plurality of diameters (D1, D2 and D3) of said brake disc (10) are in the range of 55 degrees to 65 degrees.

5. The saddle-type vehicle (1) according to claim 1, wherein a recess depth (D') created by the plurality of petal recesses (310 to 319) is within a range of a thickness (t) of the brake disc (10).

6. A saddle-type vehicle (1) according to claim 1 or claim 5, wherein the recess depth (D') created by said plurality of lobe-shaped recesses (310 to 319) is approximately equal to 1 to 1.25 times the thickness (t) of the brake disc (10).

7. A saddle type vehicle (1) according to claim 1 or claim 6, wherein at least a part of the brake pad (50) covered by the plurality of petal recesses (310 to 319) has a width (W), the width (W) of the area covered by the plurality of petal recesses (310 to 319) being equal to the recess depth (D') created by the plurality of petal recesses (310 to 319).

8. The saddle-type vehicle (1) according to claim 1, wherein the plurality of petal recesses (310 to 319) form an angle (A ') with a diameter (D) of the brake disc (10), the angle (A') being in the range of 70 to 80 degrees.

9. The saddle-type vehicle (1) according to claim 1, wherein the length of the major axis (a1, a2, a3) of the plurality of oblong grooves (30a, 30b, 30c) is in the range of 1.5 to 2 times the length of the minor axis of the plurality of oblong grooves (30a, 30b, 30 c).

10. A saddle-type vehicle (1) according to claim 1, wherein the length of said short axis is equal to the thickness of the brake disc (10).

11. A saddle-type vehicle (1) according to claim 1, wherein the angle between said diameter (D1) and said diameter (D2) is equal to the angle between said diameter (D2) and said diameter (D3), and said angle range is from 8 to 12 degrees.

Technical Field

The present subject matter relates generally to a saddle type vehicle. More particularly, but not exclusively, the present subject matter relates to a disc brake assembly for such a saddle type vehicle.

Background

For a saddle-ride vehicle, increases in engine power, torque, and vehicle weight increase the load on the braking system, which ultimately requires designing for severe conditions and forces. Thus, a larger brake disc is required to generate more torque during braking than a smaller brake disc, which reduces the brake disc temperature.

It is a well known fact that holes or slots provided in the brake disc help to provide ventilation and to dissipate the heat generated after the application of the brakes. In addition, these perforations also help remove smooth or dull wear particles that collect on the brake pad surface. Thus, particles and debris are generated all the time due to friction when the brake is applied, the particles are in contact with the brake disc and are collected by the holes or grooves when contacting the brake pads, and finally the collected debris falls down and provides smooth and continuous braking performance.

The holes or grooves provided rub the entire brake pad without leaving any scratches (chord). But due to manufacturing limitations, the holes or slots cannot be provided at the ends of the brake disc. In practice, the distance between the outer diameter of the brake disc and the start of the closest hole or groove to the outer diameter of the brake disc should be at least equal to the thickness of the brake disc. Thus, the holes or grooves alone cannot sweep the entire brake pad. The circumferential area between the periphery of the brake disc and the point of the groove or hole closest to the periphery of the brake disc remains free of contact with the groove or hole and does not cover the brake pad in this area. This is due to manufacturing limitations that result in the holes or grooves being spaced away from the outer diameter by a distance at least equal to the thickness of the brake disc.

Drawings

The present subject matter is described in detail with reference to the accompanying drawings. The same reference numbers are used throughout the drawings to reference like features and components.

Fig. 1 illustrates a side view of an exemplary two-wheeled vehicle, according to an embodiment of the present subject matter.

Fig. 2 illustrates a front isometric view of a front wheel and disc brake assembly of a two-wheeled vehicle according to an embodiment of the present subject matter.

Fig. 3 shows an isometric view of a brake disc of a two-wheeled vehicle according to an embodiment of the present subject matter.

Fig. 4 illustrates a front view of a brake rotor of a disc brake assembly according to an embodiment of the present subject matter.

FIG. 5 illustrates an upper half cross-sectional view of a brake rotor and an enlarged view of a groove provided in the brake rotor according to an embodiment of the present subject matter.

Fig. 6 illustrates a cross-sectional view of a main portion of a brake disc of a disc brake assembly according to an embodiment of the present subject matter.

FIG. 7 illustrates an enlarged view of a primary portion of a brake disc and brake pad of a disc brake assembly according to an embodiment of the present subject matter.

Detailed Description

A brake is a device for generating frictional resistance. This resistance generated using the braking device is applied to the moving machine component to stop it. In the whole process, the kinetic energy is converted into heat and sound. When in contact, a frictional force is generated between the two components. One is a moving part and the other is stationary. The stopping power or braking power depends on the surface area of the friction surface and the magnitude of the applied force. Part of the heat generated during braking is dissipated in the surrounding atmosphere and the remainder is absorbed in the brake system for a period of time.

The disc brake system is mounted on a hub of a vehicle. The brake disc rotates in the direction of the wheel. Fluid from the master cylinder is forced into the caliper, where it presses against the piston. The piston then presses against two brake pads attached to the brake disc of the wheel, forcing the wheel to slow or stop. Brake discs are typically made of steel and in some cases are made of, for example, ceramic matrix composites or carbon composites. The brake disc is connected to the wheel. To stop the rotational movement of the wheel, a friction material in the form of a brake pad is used. Brake pads are mounted on devices known as calipers.

The disc brake operates according to Pascal's Law or the principle of fluid pressure transmission, i.e. the pressure applied anywhere in a confined incompressible fluid is transmitted equally in all directions of the entire fluid, so that the pressure ratio remains the same.

When the driver presses the brake lever, a push rod connected to the brake lever and the master cylinder piston pushes the master cylinder piston. The master cylinder piston then slides and pushes a return spring in the master cylinder bore, which creates pressure in the brake hose.

Fluid then passes from the brake hose into the cylinder bore of the caliper assembly and allows the caliper piston to be pushed. The caliper piston then pushes the brake pads. This movement causes the brake pads to rub against the brake disc, which generates friction and stops the brake disc/rotor from rotating. Such disc brake systems stop or decelerate the vehicle.

Throughout braking when frictional forces act, the brake pads experience wear and the surfaces of the brake pads are constantly eroded. This also results in the formation of debris that must be removed from the brake pad for efficient operation.

To remove debris generated during pad rubbing, brake discs are typically provided with holes and grooves. These holes and slots collect debris which falls out of the holes due to centrifugal force. The purpose of providing holes is not limited to providing a mechanism to collect and remove debris generated from the brake pad, but also to reduce the amount of heat generated by friction during braking. The holes provided in the brake disc rub against the entire brake pad to remove debris from the brake pad. However, due to manufacturing limitations, the holes or slots cannot be located near the periphery of the brake disc. The smooth surface of the brake pad is not swept in the circumferential area between the outer diameter of the brake disc and the closest groove or hole relative to the periphery of the brake disc. This is due to the fabrication of the restricted opening or slot spaced away from the outer diameter by a distance at least equal to the thickness of the brake rotor. Thus, the flap-shaped recess according to the known art provides a solution for scraping debris from the rest of the brake pad. But even after the provision of the flap-shaped recesses, some areas of the brake pad remain out of contact with the flap-shaped recesses and the holes or grooves provided on the brake disc, since the position of the grooves and recesses does not cover every point of the surface area of the brake pad. Due to the lack of contact with the petal notches and holes/grooves, concentric bands are formed on the brake pads and debris generated during the braking process is not collected by the petal notches and grooves. Accordingly, there is a need for an improved disc brake assembly that overcomes all of the above-referenced problems, as well as others in the prior art. It is therefore an object of the present subject matter to provide a disc brake assembly in a vehicle, which assembly is provided with a plurality of oblong grooves inclined at predetermined angles (α, β, γ) and located at predetermined positions of the brake disc. In accordance with the present subject matter, a disc brake assembly is provided with a petal-shaped recess at the periphery of the brake disc.

With reference to one embodiment, the present subject matter also provides a plurality of elliptical slots, the major axes of the slots being aligned along separate lines and inclined at the same angle. Since the plurality of elliptical grooves are aligned along a single axis and inclined at the same angle, disc scoring is prevented.

In another embodiment, for each of the plurality of oblong grooves, a diameter of the brake disc passing through a center of the plurality of oblong grooves is at a predetermined angle to a major axis of the oblong groove.

In another embodiment, a plurality of oblong-shaped slots are provided on the brake disc at predetermined angles and predetermined locations, the oblong-shaped slots being positioned such that each oblong-shaped slot sweeps an area of the brake disc, while the remaining area is covered by the plurality of lobe-shaped notches.

In one embodiment, the plurality of oblong grooves are positioned such that a circle drawn at any distance from the center (P) of the brake disc passes through at least one oblong groove, which allows the oblong groove to sweep every point of the brake pad, and the area outside the coverage of the oblong groove is covered by a plurality of petal-shaped notches distributed at the periphery of the brake disc.

In yet another embodiment, a plurality of elliptical grooves are provided at regular intervals throughout the brake disc. The major axes of the elliptical grooves intersect each other at a predetermined angle.

In another embodiment, the periphery of the brake disc is provided with a plurality of petal-shaped recesses. The lobe-shaped recess clears the disc from debris where the oblong groove is inaccessible, i.e. the area between the disc periphery and the origin of the oblong groove closest to the disc periphery. The flap-shaped notches are cut out at a predetermined angle.

In another embodiment, the plurality of oblong slots are easy to manufacture and the shear area or shear load for stamping is small and the tonnage requirements of the machine for stamping are also small.

In an embodiment, the depression depth created by each of the plurality of petal like recesses is within a thickness range of the brake disc. A plurality of elliptical grooves are arranged on the brake disc at regular intervals.

In yet another embodiment, the present subject matter reduces the undulating region when the brake pads are in contact with the brake disk, thereby reducing noise generated during braking.

In another embodiment, the depth of the lobe-shaped recess reduces wear associated with the brake pad.

The above and other advantages of the present subject matter will be described in more detail in connection with embodiments of a two-wheeled saddle type vehicle together with the accompanying drawings in the following description.

Fig. 1 shows a side view of an exemplary two-wheeled vehicle (1) equipped with the proposed brake disc (10). The two-wheeled vehicle (1) is provided with a headlamp assembly (102), and a shield (101) is arranged immediately above the headlamp assembly (102) for protecting an instrument panel (104) from external factors such as wind, water, dust, and the like. The dashboard (104) displays several parameters of the two-wheeled vehicle (1), such as fuel level, battery charge state, vehicle speed and several other parameters. An instrument panel (104) is securely placed between a handle (105) and a shroud (101) immediately behind the headlamp assembly (102). The handle (105) is fixedly attached to the head tube (11), and a suspension fork assembly (not shown) is mounted on a hub (29a) of the wheel (24) (as shown in fig. 2). The side cover (107) protects delicate components such as PCBs and other wiring harnesses and circuitry that may be damaged by mud splash or other factors such as dirt and direct contact with moisture and air. In addition to protection purposes, the side cover (107) is also aesthetically significant. The fuel tank (106) is positioned immediately above the side cover (107) and between the rider seat (108) and the handle (105). A rear seat rider seat (110) is provided behind the rider seat (108). To provide impact protection during travel, rear shock absorbers (not shown) are secured below the fuel tank (106) and mounted on swing arms (not shown). The rear shock absorber includes a spring coil wound over a cylinder. When any type of impact is encountered due to bump travel and impact energy is transferred to the spring, the spring coil wound on the cylinder of the rear shock absorber moves upward and is compressed. A tail light assembly (112) is disposed behind the rear-seat rider seat (110), and a fender assembly (111) is disposed immediately below the tail light assembly (112), the fender assembly protecting the rear-seat rider and the tail light assembly (112) from mud splash during travel of the two-wheeled vehicle (1) on a road with water and mud. The motorcycle (1) is also provided with pedals (120) and (121) for the rear seat rider to hold his feet for comfort and to avoid free suspension of his feet. The rider is also provided with a foot peg (119) that is fixedly attached to an ankle guard (not shown) to prevent slippage of the rider's foot and provide stability to the foot while driving.

Fig. 2 shows a front isometric view of the front wheel and disc brake assembly (2) of the two-wheeled vehicle (1). The front part of the two-wheeled vehicle (1) is provided with a pair of right and left front forks (27) extending forward and obliquely downward. The front fork (27) serves as a steering gear and a suspension. Immediately below the front fork is a wheel axle carrier (28). The wheel shaft (21) is fitted in the wheel shaft holder (28) so that the wheel (24) fitted on the wheel shaft (21) can rotate together with the wheel shaft (21). In the front wheel suspension, the front fork is inverted. The inverted front fork includes an outer tube as an upper tube and an inner tube (27a) located below the outer tube. The inner tube (27a) is fitted to a wheel axle bracket (28). The wheel axle carrier (28) comprises a disc brake assembly (2), wherein a brake disc (10) is pressed on two sides in the braking process and is arranged on a wheel through a brake caliper (23).

The disc brake assembly (2) is mounted on mounting surfaces (22, 22a) formed at the ends of a lower arm portion (25) and an upper arm portion (25a), respectively. When mounted on the vehicle body, the mounting surfaces (22, 22a) are parallel to each other and oriented obliquely upward toward the rear of the vehicle body. The brake disc (10) is mounted on the outer surface of the hub (29a) at locations (33, 34, 35, 36, 37) (see fig. 3) using fasteners. A hub (29a) is disposed in a central portion of a rim (20) of a wheel (24). A brake caliper (23) for applying a braking torque to the brake disk (10) using a brake pad (50) is attached to the front fork (27). The interface area of the brake pad (50) and the brake disc (10) is connected to the mounting area by a plurality of ribs, reducing disc deformation during braking. Friction members on the brake pads (50) press against the brake disc (10) to stop rotational movement.

Fig. 3 is an isometric view of a brake disc, wherein a plurality of oblong grooves (30a, 30b, 30c) inclined at predetermined angles at predetermined positions are provided on the brake disc (10). The plurality of petal-shaped recesses (310 to 319) are provided at predetermined positions such that the depth of the plurality of petal-shaped recesses (310 to 319) is equal to the thickness of the brake disk (10) from the periphery of the brake disk (10) up to the starting point of the elliptical groove closest to (from the periphery of the brake disk) among the plurality of elliptical grooves (30a, 30b, 30 c). The distance from the outer periphery of the brake disc (10) to the start of the hole or elliptical groove closest to the outer periphery of the brake disc should be at least equal to the thickness of the brake disc (10), the thickness of the brake disc (10) being equal to the depression created by the plurality of lobe-shaped notches (310 to 319). Petal-shaped recesses (310 to 319) are provided at a predetermined angle on the periphery of the brake disc (10) to remove debris inaccessible to the plurality of elliptical grooves (30a, 30b, and 30c) in the brake pad (50).

Fig. 4 provides a brake disc (10) of the disc brake assembly (2), wherein the brake disc (10) is mounted on the hub (29a) at mounting locations (33, 34, 35, 36 and 37) by means of fasteners. The inner periphery (41) of the brake disc (10) allows for a better expansion in the transverse direction and also reduces stress. The brake disk (10) is provided with a plurality of elliptical grooves (30a, 30b, and 30c) inclined at a predetermined angle and located at a predetermined position. The oval slots are arranged at regular intervals on the brake disc (10).

When the brake pad (50) is pressed against the brake disc (10), the surface of the brake pad (50) is eroded due to friction and debris accumulates on the brake pad (50) due to friction, so removing debris from the brake pad (50) is important for the effective operation of the brake. A plurality of oblong-shaped grooves (30a, 30b and 30c) provided on the brake disc (10) collect debris from the brake pad, and during rotational movement of the brake disc (10) together with the wheel (24), the debris falls out of the plurality of oblong-shaped grooves (30a, 30b and 30c) provided on the brake disc (10) due to centripetal force. The brake disk (10) is provided with a plurality of petal-shaped recesses (310 to 319) at a fixed interval at the periphery of the brake disk (10) in addition to the plurality of elliptical grooves (30a, 30b, and 30 c).

The plurality of petal-shaped recesses (310 to 319) are arranged such that the remaining debris not collected by the plurality of elliptical grooves (30a, 30b, and 30c) is collected from the brake pad (50) by the plurality of petal-shaped recesses (310 to 319).

Fig. 5 shows the upper half of the brake disc (10) with a centre P. The brake disk (10) is provided with a plurality of oblong grooves (30a, 30b and 30 c). A plurality of elliptical grooves (30a, 30b, and 30c) are inclined at a predetermined angle and located at predetermined positions throughout the brake disk (10).

Each of the plurality of elliptical grooves (30a, 30b, and 30c) includes two imaginary circles (shown in an enlarged sub-figure). Each of the plurality of imaginary circles has a center. The plurality of imaginary circles have centers (c1, c2, c3, c4, c5, and c 6). Centers (c1 and c2) are the centers of imaginary circles of the first elliptical grooves (30a), centers (c3 and c4) are the centers of imaginary circles of the second elliptical grooves (30b), and centers (c5 and c6) are the centers of imaginary circles of the second elliptical grooves (30 c). Each of the plurality of centers (c1, c2, c3, c4, c5, and c6) passes through a radius (R1, R2, R3, R4) drawn from a center (P) of the brake rotor (10). Center c1 passes through radius R1, centers c2 and c3 pass through radius R2, centers c4 and c5 pass through radius R3, and center c6 passes through radius R4. When the brake is applied, the brake pad (50) is in contact with the plurality of elliptical grooves (30a, 30b, and 30c) and debris is collected by the plurality of elliptical grooves (30a, 30b, and 30 c). The portion of the brake pad (50) not contacted by the plurality of elliptical grooves (30a, 30b, and 30c) is covered by a plurality of flap-shaped recesses (310 to 319) distributed at the periphery of the brake pad (10). The plurality of long axes (a1, a2, and a3) are inclined at a predetermined angle.

Fig. 6 shows a cut-out of the brake disc (10). Each of a plurality of major axes (a1, a2, a3) of the plurality of oblong-shaped grooves (30a, 30b, 30c) forms a predetermined angle with a plurality of diameters (D1, D2, D3) of the brake disc (10), respectively. The first major axis (a1) of the first elliptical groove (30a) forms an angle α with the diameter (D1), the second major axis (a2) of the second elliptical groove (30b) forms an angle β with the diameter (D2), and the third major axis (a3) of the third elliptical groove (30c) forms an angle γ with the diameter (D3) of the brake disk. The angles α, β, and γ are substantially equal to each other, i.e., in one embodiment, α ═ β ═ γ, and are substantially set in a range from 55 degrees to 65 degrees.

The angles α, β and γ are inclined in such a way that the angular values of α, β and γ contribute to reducing the percentage of the perimeter ratio [ actual perimeter/(π × D) ], where "D" is the diameter of the brake disc (10). D1 passes through the center of the first oblong slot (30a), D2 passes through the center of the second oblong slot (30b), and D3 passes through the center of the third oblong slot (30 c). The long axes (a1, a2, a3) of each of the elliptical grooves (30a, 30b, 30c) intersect each other at a predetermined angle. The plurality of elliptical grooves (30a, 30b, and 30c) have a predetermined size. The lengths of the major axes (a1, a2, a3) of the elliptical grooves (30a, 30b, 30c) are in the range of 1.5 to 2 times the length of the minor axis.

Furthermore, during braking it is important that the brake pads (50) are brought into contact when pressed against the brake disc (10) such that the contact area between the brake pads (50) and the brake disc (10) should not fluctuate, which would otherwise lead to increased noise. The angle between diameter (D1) and diameter (D2) is "θ"; the angle between the diameter (D2) and the diameter (D3) isThe angles "θ" andthe fluctuation area is reduced, and therefore noise generated in the braking process is reduced. The depth of the depression created by the plurality of petal-shaped recesses (310 to 390) is within the thickness range of the brake disc (10). The diameter (D) of the brake rotor (10) is at an angle (a') to any one of the plurality of lobe-shaped recesses (310 to 390) that is in the range of 70 degrees to 80 degrees.

Fig. 7 shows an enlarged view of a main portion of the brake disk (10). During braking, the brake pad (50) contacts the brake disc (10) and a plurality of grooves (30a, 30b, and 30c) distributed on the brake disc (10) that remove debris generated by friction. The entire area of the brake pad (50) is covered by the plurality of elliptical grooves (30a, 30b, and 30c), and the remaining area outside the covered area of the plurality of elliptical grooves (30a, 30b, and 30c) having the width "W" is covered by the plurality of flap-shaped notches (310 to 319), which ensures that every point on the surface of the brake pad (50) is covered and effectively cleaned of debris. The recess depth (D') resulting from the plurality of lobe-shaped notches (310 to 319) is given by:

t is less than or equal to D' and less than or equal to 1.25 t; wherein "t" is the thickness of the brake disc (10)

The depression depth (D') ensures effective removal of debris from the brake pad (50) while also rapidly reducing wear of the brake pad (50). Further, the diameter (D) of the brake disc (10) is at an angle in the range of 70 to 80 degrees with any one of the plurality of lobe-shaped recesses (310 to 390) to cover the remaining area of the brake pad (50) having the width "W" outside the covered area of the plurality of elliptical grooves (30a, 30b, and 30 c). And, a width (W) of a region covered by the plurality of petal-shaped recesses (310 to 319) is equal to a recess depth (D ') produced by the plurality of petal-shaped recesses (310 to 319), that is, W ═ D'

W＝D’

The arrow provided in the upper right corner of each figure depicts the direction relative to the vehicle, where applicable, arrow F represents the forward direction, arrow R represents the rearward direction, T represents the upward direction, and B represents the downward direction. Improvements and modifications may be incorporated herein without departing from the scope of the invention.