Floating-caliper spot-type disc brake for high-powered vehicles
First Claim
1. A floating-caliper spot-type disc brake for an automotive vehicle having a brake disc and a steering knuckle, said disc brake including a brake carrier which is fixed to said steering knuckle;
- a floating caliper having a first part on an axially internal side of said brake disc and a second part on an axially external side of said disc, said first and second parts connected together across an external edge of said brake disc;
means axially slidingly guiding said floating caliper on said brake carrier including pin guides received in said floating caliper and brake carrier;
a plurality of brake shoes disposed on either side of said brake disc, said plurality of brake shoes including a first and a second brake shoe arranged on an axial internal side of said brake disc along the circumference thereof and widely spaced apart a substantial distance from each other in the circumferential direction, said first and second brake shoes supported on portions of said brake carrier extending between and on either side of said first and second brake shoes;
hydraulic actuating means adapted to urge said plurality of brake shoes against said brake disc, said hydraulic actuating means mounted on said first part of said floating caliper on said axially internal side of said brake disc;
said hydraulic actuating means comprised of at least two brake cylinders with brake pistons sliding therein;
said plurality of brake shoes also including a third brake shoe disposed on said second part of said floating caliper on said axially external side of said brake disc;
each of said first and second brake shoes having a friction surface facing said axially internal side of said brake disc;
said third brake shoe having a friction surface facing said axially external side of said brake disc a centroid of said friction surface of said third brake shoe substantially centered between a centroid of the friction surface of each of said first and second brake shoes, said third brake shoe extending across said widely spaced apart distance of said first and second brake shoes.
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Accused Products
Abstract
The invention is related to a spot-type disc brake with a stationary brake carrier (19) at which a floating caliper (1) is slidingly guided which straddles the edge of a brake disc (10), with two brake cylinders (11, 12) which are positioned on the internal axial side of the brake disc (10) aside each other and whose brake pistons (13, 14) act on the brake shoes (5, 7) which are arranged on the same axial side and in circumferential direction of the brake disc (10) at a distance from each other.
According to the invention a third brake shoe (6) is fixed on the external axial side of the brake disc (10) to the floating caliper (1), which brake shoe is positioned staggered in such a manner that its friction area point of gravity (36) comes to be arranged substantially between the other two brake shoes (5, 7) in the circumferential direction of the brake disc (10). Braking noises and brake rubbing are eliminated by this arrangement.
Further advantages of the inventive brake are constituted by its ease of serviceability in view of an ease of mounting of the brake shoes (5, 6, 7) and by its floating caliper (1) which allows to be manufactured with ease and at but low cost and with but little material, and which simultaneously with a low weight affords an elevated stiffness and a large brake disc diameter.
70 Citations
20 Claims
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1. A floating-caliper spot-type disc brake for an automotive vehicle having a brake disc and a steering knuckle, said disc brake including a brake carrier which is fixed to said steering knuckle;
- a floating caliper having a first part on an axially internal side of said brake disc and a second part on an axially external side of said disc, said first and second parts connected together across an external edge of said brake disc;
means axially slidingly guiding said floating caliper on said brake carrier including pin guides received in said floating caliper and brake carrier;
a plurality of brake shoes disposed on either side of said brake disc, said plurality of brake shoes including a first and a second brake shoe arranged on an axial internal side of said brake disc along the circumference thereof and widely spaced apart a substantial distance from each other in the circumferential direction, said first and second brake shoes supported on portions of said brake carrier extending between and on either side of said first and second brake shoes;
hydraulic actuating means adapted to urge said plurality of brake shoes against said brake disc, said hydraulic actuating means mounted on said first part of said floating caliper on said axially internal side of said brake disc;said hydraulic actuating means comprised of at least two brake cylinders with brake pistons sliding therein; said plurality of brake shoes also including a third brake shoe disposed on said second part of said floating caliper on said axially external side of said brake disc; each of said first and second brake shoes having a friction surface facing said axially internal side of said brake disc; said third brake shoe having a friction surface facing said axially external side of said brake disc a centroid of said friction surface of said third brake shoe substantially centered between a centroid of the friction surface of each of said first and second brake shoes, said third brake shoe extending across said widely spaced apart distance of said first and second brake shoes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a floating caliper having a first part on an axially internal side of said brake disc and a second part on an axially external side of said disc, said first and second parts connected together across an external edge of said brake disc;
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20. A floating-caliper spot-type disc brake for an automotive vehicle having a brake disc and a steering knuckle, said disc brake including a brake carrier which is fixed to said steering knuckle;
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a floating caliper having a first part on an axially internal side of said brake disc and a second part on an axially external side of said disc, said first and second parts connected together across an external edge of said brake disc; means axially slidingly guiding said floating caliper on said brake carrier including pin guides received in said floating caliper and brake carrier; a plurality of brake shoes disposed on either side of said brake disc, said plurality of brake shoes including a first and a second brake shoe arranged on an axial internal side of said brake disc along the circumference thereof and widely spaced apart a substantial distance from each other in the circumferential direction, said first and second brake shoes supported on portions of said brake carrier extending between and on either side of said first and second brake shoes; hydraulic actuating means adapted to urge said plurality of brake shoes against said brake disc, said hydraulic actuating means mounted on said first part of said floating caliper on said axially internal side of said brake disc;
said hydraulic actuating means comprised of at least two brake cylinders with brake pistons sliding therein;said plurality of brake shoes also including a third and a fourth brake shoe, each having a friction surface facing said external side of said brake disc and widely spaced circumferentially apart a substantial distance and mounted to said floating caliper; said third and fourth brake shoes friction surfaces having centroids spaced apart circumferentially a distance which is substantially different from the distance of said circumferential spacing of said centroids of said friction surfaces of said first and second brake shoes.
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Specification