Patent Application
20120111674
1. Field of the Invention
The present invention relates to a brake disc, and more particularly to a wear-resistant brake disc composed of two different materials for decreasing weight and providing wear resistance.
2. Description of Related Art
A conventional brake disc is utilized in a disk braking system. The conventional brake disc is usually formed with a single material, for example, aluminum or stainless steel. The aluminum provides a light-weighted effect. The stainless steel provides a highly strength and wear resistance.
However, the strength of the aluminum is not strong enough and is easily abraded. The stainless steel is too heavy to utilize on a light-weight bike.
The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional brake disc.
The main objective of the present invention is to provide an improved brake disc.
To achieve the objective, a wear-resistant brake disc in accordance with the present invention comprises a carrier-plate provided for adapting to assemble with a wheel hub and two outer rings respectively mounted on two sides of the carrier-plate for providing a wear-resisting effect. The carrier-plate is composed of light metal. The carrier-plate has a plurality of grooves annularly defined therein and passing therethrough such that each groove passes through the carrier-plate to respectively define two openings in two sides of the carrier-plate. Each outer ring is composed of steel. Each outer ring has a plurality of indentations defined in an outer side thereof. Each indentation has a bottom protruded from an inner side of each outer ring to form a protruding surface. The protruding surfaces of each outer ring are aligned with the grooves in the carrier-plate. The protruding surfaces of the outer ring are laterally inserted into the openings disposed in one side of the carrier-plate and the protruding surfaces of the other outer ring are inserted into the openings disposed in the other side of the carrier-plate. The two protruding surfaces in a same groove are connected by a fastening means such that the two outer rings are firmly connected with the carrier-plate. The fastening means is can be spot welding or thermal-adhesive bonding such that the two protruding surfaces in a corresponding groove are fixed to each other. The carrier-plate has two recesses respectively defined in the two sides thereof for respectively receiving the two outer rings. The carrier-plate has an axle hole centrally defined therein for adapting to assemble with the wheel hub. Each outer ring has a thickness less than or equal to a half thickness of the carrier-plate. Each outer ring has a plurality of vents defined therein and passing therethrough. Each vent is disposed between two adjacent indentations such that the vents and the indentations are alternately arranged on each outer ring.
In accordance with another aspect of the present invention, each outer ring has a plurality of protrusions extending therefrom and a plurality of vents defined therein and passing therethrough. The protrusions of each outer ring are aligned with the grooves in the carrier-plate and respectively located adjacent to the vents. The vents and the vents who asides the protrusions are alternatively arranged. Every two protrusions of each outer ring are respectively positioned on relative inner sides of the two vents and one vent located between the every two protrusions, and every two protrusions of each outer ring are respectively positioned on relative outer sides of the two vents and one vent located between the every two protrusions. The protrusions of one outer ring are laterally inserted into the openings disposed in one side of the carrier-plate and the protrusions of the other outer ring are inserted into the openings disposed in the other side of the carrier-plate. The two protrusions in a same groove are connected by a fastening means. The fastening means is spot welding or thermal-adhesive bonding.
Therefore, the wear-resistant brake disc in accordance with the present invention provides the following advantages:
1. The carrier-plate is composed of light metal and the thickness of the outer ring is decreased such that the weight of the brake disc is decreased. The material of the outer ring is steel such that a resistant strength of the brake disc is increased.
2. The outer ring is received in the recess in the carrier-plate and the protruding surfaces/protrusions of the outer ring are embedded into the groove in the carrier-plate. The two protruding surfaces/protrusions in the same groove are spot welded to each other. The two outer rings and the carrier-plate have a great contacting area disposed therebetween such that the two outer rings are firmly fixed/clamped on the two sides of the carrier-plate for transferring a braking shear load from outer rings to the carrier-plate. A resistant strength of the brake disc in accordance with the present invention is great to support a brake friction.
3. The fastening means for combining the two protruding surfaces is spot welding or thermal-adhesive bonding. The processing technology is simple. The manufacturing fee is decreased.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
Referring to the drawings and initially to
The carrier-plate 1 is composed of light metal. In the preferred embodiment of the present invention, the light metal is aluminum. The carrier-plate 1 has an axle hole 10 centrally defined therein for adapting to assemble with a wheel hub. The carrier-plate 1 has two recesses 11 respectively defined in two sides thereof for correspondingly and respectively receiving the two outer rings 2. The carrier-plate 1 has a plurality of grooves 111 annularly defined therein and passing therethrough such that each groove 111 passes through the carrier-plate 1 to respectively define two openings (not numbered) in two sides of the carrier-plate 1.
Each outer ring 2 is composed of steel. In the preferred embodiment of the present invention, each outer ring 2 is composed of stainless steel or galvanized iron. Each outer ring 2 has a thickness less than or equal to a half thickness of the carrier-plate 1. Each outer ring 2 has a plurality of indentations 20 defined in an outer side (the side which is provided to contact with a disc brake) thereof. Each indentation 20 has a bottom protruded from an inner side (the side which is contacted with the carrier-plate 1) of each outer ring 2 to form a protruding surface 201. Each outer ring 2 has a plurality of vents 21 defined therein and passing therethrough for dissipating a braking heat. Each vent 21 is disposed between two adjacent indentations 20 such that the vents 21 and the indentations 20 are alternately arranged on each outer ring 2. The protruding surfaces 201 and the vents 21 of each outer ring 2 are correspondingly aligned with the grooves 111 in the carrier-plate 1. The protruding surfaces 201 of the outer ring 2 are laterally inserted into the openings disposed in one side of the carrier-plate 1 and the protruding surfaces 201 of the other outer ring 2 are inserted into the openings disposed in the other side of the carrier-plate 1.
As shown in
With reference to
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
