PARKING CALIPER ASSEMBLY

• US 20150027821A1
• Filed: 02/15/2013
• Published: 01/29/2015
• Est. Priority Date: 02/16/2012
• Status: Active Grant

• Current Assignee: Brembo SPA (Nuova Fourb Srl)
• Original Assignee: Freni Brembo S.P.A.
• Inventors: Nessi, Lorenzo, Bonetti, Adriano, Crippa, Cristian
• Granted Patent: US 9,512,890 B2
• Time in Patent Office: Days
• US Class Current: 188/72.3
• CPC Class Codes: B60T 1/065 employing disc B60T1/062 takes precedence
• CPC Class Codes: F16D 2055/0041 Resilient elements interposed directly between the actuating member and the brake support, e.g. anti-rattle springs
• CPC Class Codes: F16D 2055/007 Pins holding the braking members
• CPC Class Codes: F16D 55/224 with a common actuating member for the braking members
• CPC Class Codes: F16D 65/0075 assembled from a plurality of parts
• CPC Class Codes: F16D 65/092 for axially-engaging brakes, e.g. disc brakes
• CPC Class Codes: F16D 65/0973 not subjected to brake forces
• CPC Class Codes: F16D 65/0975 Springs made from wire
• CPC Class Codes: F16D 65/12 Discs; Drums for disc brakes

Abstract

An assembly comprising a caliper body (2) of a caliper assembly for parking disc brake, said caliper body (2) comprising a channel (14), said axial channel (14) being defined by at least one wall having at least one flattened length forming at least one guide surface (15; 16); at least one portion of caliper body (10) projecting towards the disc or above the disc (3), said portion of caliper body (10) comprising a surface facing the disc (11) or at least the friction material (12) of said pad (8), and wherein said surface facing the disc (11) has a flattened length forming at least one abutment surface (12; 13) and wherein said at least one guide surface (15; 16) is oriented differently with respect to said at least one abutment surface (12; 13) so as to avoid that they are mutually coplanar; said guide surface (15; 16) is suitable to face an opposite guide surface (25; 26) provided for on an associable supporting plate (21, 22) of an associable pad (8) in order to allow the positioning and sliding thereof against the caliper body (2) and wherein, in said abutment surface (12, 13), it is suitable to face an opposite abutment surface (27, 28) provided for on the supporting plate (21, 22) of at least one associable pad (8) so as to allow the pad to abut and slide against said abutment surface (12; 13).

Claims

1. A caliper assembly for parking disc brake comprising,

a parking caliper body arranged astride of a disc for disc brake so as to exert, on at least one braking surface thereof, a braking action capable of holding a vehicle in a parking position;

said disc having a substantially axially symmetrical body suitable to rotate about a rotational axis defining an axial direction to the disc, a direction orthogonal to this axial direction or radial direction to the disc, and a direction orthogonal to said axial direction and said radial direction or tangential direction to the disc or circumferential direction, and forming opposite braking surfaces;

said caliper body comprising

a pin seat suitable to receive a suspension pin of at least one pad for disc brake;

an upper surface of the caliper body facing the side opposite with respect to the braking disc or the friction material of at least one received pad;

a channel directed according to a direction parallel to the axial direction or a sliding direction of at least one pad approaching to or moving away from one of the braking surfaces of the disc;

said channel being obtained in a portion of the caliper body arranged astride or above said disc;

said axial channel being defined by at least one wall having at least one flattened length forming at least one guide surface;

said portion of caliper body projecting astride of the disc or above the disc comprising a surface facing the disc or at least the friction material of said pad,

wherein

said surface facing the disc has a flattened length forming at least one abutment surface,

and wherein

said at least one guide surface is oriented differently with respect to said at least one abutment surface so as to avoid that said guide surface and said abutment surface are coplanar;

said assembly further comprising;

at least one suspension pin of at least one pad for disc brake having at least one pin end received with clearance in said pin seat provided for in the caliper body;

wherein said suspension pin is arranged astride of said disc;

at least one pad for disc brake comprising friction material suitable to abut against a braking surface of the disc when said pad is urged by thrust means housed in said caliper body;

said at least one pad comprising a supporting plate comprising a plate portion extending outwardly of the friction material, so as to avoid that it faces the braking surfaces of the disc and so as to move radially outwardly and outside the area of the pad that can be arranged facing the disc;

said plate portion comprising a coupling loop receiving with clearance said suspension pin to suspend said at least one plate to the suspension pin allowing it to freely slide approaching to or moving away from the disc;

said plate portion further comprising;

a flattened length to form an opposite guide surface arranging facing said at least one guide surface to slide thereon;

a further flattened length to form at least one opposite abutment surface suitable to abut against said at least one abutment surface;

said assembly further comprising;

at least one suspension spring anchoring with the ends thereof to the upper surface of the caliper body and which passes around the suspension pin below it on the opposite side to said upper surface to move said pin away from the disc and to affect it away from the disc together with the suspended pad affecting said pin and the suspended pad in a substantially radial direction away from the rotational axis of the disc, bringing said opposite abutment surface to abut against said abutment surface and keeping said opposite guide surface free to slide along said guide surface, so as to avoid that said abutment surface and said opposite abutment surface, as well as said guide surface and said opposite guide surface are arranged laterally to the disc at the side of the braking surfaces of the disc.

2. The assembly according to claim 1, wherein said flattened lengths to form opposite guide and/or abutment surfaces are obtained at the edge of the plate of the pad.

3. The assembly according to claim 1, wherein

said guide surfaces are two guide surfaces and/or wherein

said guide surfaces are mutually opposite, and/or wherein

said guide surfaces are mutually parallel and parallel to the axial direction, as well as to the radial direction;

and/or wherein

said opposite guide surfaces are two opposite guide surfaces and/or wherein

said opposite guide surfaces are opposite, and/or wherein

said opposite guide surfaces are mutually parallel and parallel to the axial direction, as well as to the radial direction.

4. The assembly according to claim 1, wherein said abutment surfaces are two abutment surface, and/or wherein

said abutment surfaces are mutually parallel, and/or wherein

said abutment surfaces are mutually coplanar, and/or wherein

said abutment surfaces are mutually parallel and parallel to the tangential direction;

and/or wherein

said opposite abutment surfaces are two opposite abutment surfaces, and/or wherein

said opposite abutment surfaces are opposite, and/or wherein

said opposite abutment surfaces are mutually coplanar, and/or wherein

said opposite abutment surfaces are mutually parallel and parallel to the axial direction.

5. The assembly according to claim 1, wherein the guide surfaces are substantially orthogonal to the abutment surfaces;

and/or wherein the opposite guide surfaces are substantially orthogonal to the opposite abutment surfaces.

6. The assembly according to claim 1, wherein said caliper body is a floating caliper body suitable to slide with respect to one support thereof, and/or wherein

said caliper body comprises thrust means of the pad arranged only at one side of the disc and it transfers the braking action to the opposite pad by an axial displacement of said caliper body.

7. The assembly according to claim 1, wherein said caliper body is of the floating type and it slides axially supported by a separated caliper body, and/or wherein

said supporting caliper body is a caliper body of the fixed type.

8. A pad of caliper assembly for disc brake, wherein said pad comprises friction material suitable to abut against a braking surface in a disc of disc brake when said pad is urged by thrust means housed in a caliper body,

said pad comprises a supporting plate comprising a plate portion extending outwardly of the friction material so as to move radially outside of the area of the pad that can be arranged facing the disc;

said plate portion comprises a flattened length to form an opposite guide surface suitable to arrange itself facing at least one guide surface of the caliper body to abut and slide thereon;

said plate portion further comprising a further flattened length to form at least one opposite abutment surface suitable to abut against and to slide on at least one abutment surface of the caliper body, and/or wherein

said at least one opposite guide surface is oriented differently with respect to said at least one opposite abutment surface so as to avoid that said opposite guide surface and said opposite abutment surface are coplanar.

9. The pad according to claim 8, wherein said plate portion extends radially in radial direction on the opposite side with respect to the rotational axis of the disc which said pad faces, preferably but not necessarily in a central position to the pad when the pad is observed in the tangential direction, and/or wherein

said flattened lengths to form opposite guide and/or abutment surfaces are obtained at the edge of the plate of the pad;

and/or wherein

said opposite guide surfaces are two opposite guide surfaces, and/or wherein

they are opposite guide surface, and/or wherein

they are mutually parallel and parallel to the axial direction and also to the radial direction, and/or wherein

said opposite abutment surfaces are two opposite abutment surfaces, and/or wherein

they are mutually parallel opposite abutment surfaces, and/or wherein

they are coplanar opposite abutment surfaces, and/or wherein

they are opposite abutment surfaces that are mutually parallel and parallel to the tangential direction, and/or wherein

said opposite guide surfaces are substantially orthogonal to the opposite abutment surfaces.

10. A caliper body of a caliper assembly for parking disc brake, comprising

a caliper body arranged astride of a disc for disc brake so as to exert, on at least one braking surface thereof, a braking action capable of holding a vehicle in a parking position;

wherein said disc has a substantially asymmetric body suitable to rotate about a rotational axis defining an axial direction to the disc, a direction orthogonal to said axial direction or radial direction to the disc, and a direction orthogonal to said axial direction and said radial direction or tangential direction to the disc or circumferential direction;

said caliper body comprising

a channel directed according to a direction parallel to the direction or a sliding direction of at least one pad approaching to or moving away from one of the braking surfaces of the disc;

said axial channel being defined by at least one wall having at least one flattened length forming at least one guide surface;

at least one portion of caliper body projecting towards the disc or above the disc;

this portion of caliper body comprising a surface facing the disc or at least the friction material of said pad wherein

said surface facing the disc has a flattened length forming at least one abutment surface and wherein

said at least one guide surface is oriented differently with respect to said at least one abutment surface so as to avoid that they are mutually coplanar;

said guide surface is suitable to face an opposite guide surface provided for on an associable supporting plate or supporting plate of an associable pad in order to allow the positioning and sliding thereof against the caliper body, and wherein

said abutment surface is suitable to face an opposite abutment surface provided for on the supporting plate of at least one associable pad so as to allow the pad to abut and slide against said abutment surface.