Brake disc and brake disc manufacturing method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTomohiro Yokoyama
Life of this patent
Estimating the term…
Abstract
The brake disc includes two first members and at least one second member. Each of the first members has a sliding surface, and has almost a disc shape or an almost annular plate shape. The second member has a plurality of fins and a fin holding part. Each of the two first members and the at least one second member is manufactured by pressing. The brake disc is manufactured as the two first members and the at least one second member manufactured by pressing are joined to each other.
Claims9
A brake disc that is able to rotate integrally with a vehicle wheel, the brake disc having a pair of sliding surfaces on which a friction engaging member of a friction brake that suppresses rotation of the wheel is able to slide, the brake disc comprising:
- a pair of first members, each of the first members having an almost disc shape or an almost annular plate shape, and each of the first members comprising one of the sliding surfaces;
- and
- at least one second member that includes a plurality of fins and a fin holding part that holds the fins and has an almost disc shape or an almost annular shape, wherein the first members and the at least one second member are joined to each other in a state where the sliding surfaces are positioned on opposite sides from each other, wherein:
- each of the fins extends radially from the fin holding part;
- and
- wherein the fins comprise first fins and second fins, wherein the first fins are positioned at set intervals and each of the first fins has contact surfaces that contact with the first members, respectively, wherein each of the second fins has contact surfaces that contact with the first members, respectively, and an area of each of the contact surfaces of each of the first fins is larger than an area of each of the contact surfaces of each of the second fins, and
- a number of the second fins is more than a number of the first fins, and the second fins are provided between each of the first fins positioned at intervals of a set central angle.
A brake disc manufacturing method that is a manufacturing method for a brake disc that includes a pair of sliding surfaces on which a friction engaging member of a friction brake slides, the friction brake suppressing rotation of a vehicle wheel, the brake disc being able to rotate integrally with the wheel, wherein:
- the brake disc includes
- a pair of first members, each of the first members having an almost disc shape or an almost annular plate shape, and each of the first members comprising one of the sliding surfaces;
- and
- at least one second member that includes a plurality of fins and a fin holding part that holds the fins and has an almost disc shape or an almost annular shape;
- wherein:
- each of the fins extends radially from the fin holding part;
- and
- wherein the fins comprise first fins and second fins, wherein the first fins are positioned at set intervals and each of the first fins has contact surfaces that contact with the first members, respectively, wherein each of the second fins has contact surfaces that contact with the first members, respectively, and an area of each of the contact surfaces of each of the first fins is larger than an area of each of the contact surfaces of each of the second fins, and
- a number of the second fins is more than a number of the first fins, and the second fins are provided between each of the first fins positioned at intervals of a set central angle, and
- the manufacturing method includes:
- a pressing step in which each of the first members and the at least one second member is manufactured by pressing;
- and
- a joining step in which the first members and the at least one second member manufactured in the pressing step are joined to each other in a state where the sliding surfaces are positioned on opposite sides from each other.
Dependencies are inferred from the claim text.