| CPC F16D 65/18 (2013.01) [F16D 55/226 (2013.01); F16D 2055/0016 (2013.01); F16D 65/0068 (2013.01); F16D 2121/04 (2013.01); F16D 2127/02 (2013.01)] | 9 Claims |
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1. A caliper body for a brake caliper for a disc brake, wherein said disc brake defines an axial direction (X-X), either coincident with or parallel to a rotation axis (A-A) of a disc of the disc brake; said axial direction (X-X) defines an inner axial direction (XI), directed towards the disc, and an outer axial direction (XO), opposite to said inner axial direction (XI);
wherein said caliper body is configured to straddle the disc, and wherein said caliper body comprises:
a first elongated portion, configured to face a first braking surface of the disc either directly or indirectly by interposing at least one first brake pad;
a second elongated portion, opposite to said first elongated portion and configured to face a second braking surface of the disc opposite to said first braking surface either directly or indirectly by interposing at least one second brake pad;
at least one caliper bridge connecting said first elongated portion and said second elongated portion to each other arranged straddling the disc;
and wherein at least either said first elongated portion or said second elongated portion comprises:
at least one thrust device housing or cylinder, configured to receive at least one portion of a thrust device, configured to apply a thrust action directed in the inner axial direction (XI) on at least one brake pad to abut said at least one brake pad against a braking surface of the disc;
said at least one thrust device housing extending about a thrust axis (a-a), parallel to the axial direction (X-X), and defining a radial direction (r-r) orthogonal to said thrust axis (a-a) and incident thereto, said radial direction (r-r) defining an inner radial direction (rI) directed towards said thrust axis (a-a) and an outer radial direction (rO), opposite to said inner radial direction (rI);
a first annular housing which radially opens into said at least one thrust device housing, said first annular housing being configured to receive an elastic retraction element, configured to apply a retracting action in the outer axial direction (XO) on said thrust device; said first annular housing being at least partially delimited in the outer radial direction (rO) by a first bottom wall, and in the inner axial direction (XI) by a second axial wall; and
a second annular chamber which radially opens into said first annular housing, said second annular chamber being delimited in the outer radial direction (rO) by a chamber bottom arched wall having a chamber bottom arched wall concavity facing in the inner radial direction (rI) that joins in an inner axial portion thereof to said second axial wall and in an outer axial portion thereof to said first bottom wall of said first annular housing, so that said second annular chamber receives at least one portion of said elastic retraction element at least when said thrust device applies the thrust action,
wherein said second axial wall joins said chamber bottom arched wall in continuous manner, without forming edges,
said chamber bottom arched wall is arched with a constant curvature radius;
said first bottom wall of the first annular housing extends along a straight line;
said first bottom wall of the first annular housing tapers in the outer axial direction (XO), forming a first bottom wall angle (γ) comprised between 6° and 8°; and/or wherein
said first bottom wall, said chamber bottom arched wall and said second axial wall are mutually in succession and connected to avoid edges therebetween,
said chamber bottom arched wall sweeps an arched wall angle (a) comprised between 170° and 220°;
said arched wall angle (a) is evaluated on a plane parallel to the axial direction (X-X) and the radial direction (r-r);
said chamber bottom arched wall joins the first bottom wall by a first connection having a first connection concavity opposite to said chamber bottom arched wall concavity; and
said first connection sweeps an angle comprised between 96° and 98°.
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