Disc brake comprising at least one elastic return spring for a brake pad, elastic return spring, replacement kit and mounting method

An axial elastic return spring for axially returning a brake pad of a disc brake from an active position to an inactive position, said spring being intended to be interposed between the brake pad and a fixed support, said spring comprising:

• an elastic deformation portion, arranged to produce a reaction force during pressing of said pad in the active position, so as to return translationally said brake pad to the inactive position,
• a carrier portion arranged to be fastened on the fixed support of the disc brake, and which is integral with the deformation portion,
• a pad portion arranged to be fastened to the brake pad, in the form of a fastening tab, which is integral with the deformation portion and which extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad,
• the carrier portion includes a support part having a first support section which:
• is integral with the deformation portion,
• extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad, and
• is arranged to press axially on the fixed support under the effect of the deformation of the spring when the brake pad leaves its inactive position,
• and the carrier portion includes a connection part comprising at least one connection fold arranged and configured to press on an anchoring part carried by a transverse face of the fixed support, and cooperate with said anchoring part to prevent lifting of said connection part,
• the connection part comprises at least three connection sections:
• a second lateral connection section, a proximal end of which is connected to the first support section by a first fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• a third connection section, a proximal end of which is connected to the second section by a second fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• a fourth lateral connection section comprising a distal end, and a proximal end connected to the third section by a third fold, the folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• and
• the at least second lateral connection, third connection and fourth lateral connection sections and/or the first, second and third folds being arranged to substantially form a “U”, in such a way that the connection part can fit on the anchoring part in the form of a peg, and thus prevent the lifting by a pinching of said peg,
• the connection part comprising fifth connection section comprising a distal end configured as an overfolded loop, and a proximal end connected to the fourth section by a fourth fold, the folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad.

An axial elastic return spring for axially returning a brake pad of a disc brake from an active position to an inactive position, said spring being intended to be interposed between the brake pad and a fixed support, said spring comprising:

• an elastic deformation portion, arranged to produce a reaction force during pressing of said pad in the active position, so as to return translationally said brake pad to the inactive position;
• a carrier portion arranged to be fastened on the fixed support of the disc brake, and which is integral with the deformation portion;
• a pad portion arranged to be fastened to the brake pad, in the form of a fastening tab, which is integral with the deformation portion and which extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad;
• the carrier portion including a support part having a first support section which:
• is integral with the deformation portion;
• extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad;
• and
• is arranged to press axially on the fixed support under the effect of the deformation of the spring when the brake pad leaves its inactive position, and the carrier portion comprises a connection part comprising at least one connection fold arranged and configured to press on an anchoring part carried by a transverse face of the fixed support, and cooperate with said anchoring part to prevent lifting of said connection part,
• the connection part comprises at least three connection sections:
• a second lateral connection section, a proximal end of which is connected to the first support section by a first fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• a third connection section, a proximal end of which is connected to the second section by a second fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• a fourth lateral connection section comprising a distal end, and a proximal end connected to the third section by a third fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• and
• the at least second lateral connection, the third connection, and the fourth lateral connection sections and/or the first, second and third folds being arranged to substantially form a “U”, in such a way that the connection part can fit on the anchoring part in the form of a peg, and thus prevent the lifting by a pinching of said peg,
• the connection part comprising a fifth connection section comprising a distal end configured as an overfolded loop, and a proximal end connected to the fourth section by a fourth fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad, the fifth connection section extends in the direction of the first support section or the second connection section, so as to produce a gripping or over-centering tab with the anchoring part.

An axial elastic return spring for axially returning a brake pad of a disc brake from an active position to an inactive position, said spring being intended to be interposed between the brake pad and a fixed support, said spring comprising:

• an elastic deformation portion, arranged to produce a reaction force during pressing of said pad in the active position, so as to return translationally said brake pad to the inactive position;
• a carrier portion arranged to be fastened on the fixed support of the disc brake, and which is integral with the deformation portion;
• a pad portion arranged to be fastened to the brake pad, in the form of a fastening tab, which is integral with the deformation portion and which extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad;
• the carrier portion including a support part having a first support section which:
• is integral with the deformation portion;
• extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad;
• and
• is arranged to press axially on the fixed support under the effect of the deformation of the spring when the brake pad leaves its inactive position, and the carrier portion comprises a connection part comprising at least one connection fold arranged and configured to press on an anchoring part carried by a transverse face of the fixed support, and cooperate with said anchoring part to prevent lifting of said connection part,
• the connection part comprises at least three connection sections:
• a second lateral connection section, a proximal end of which is connected to the first support section by a first fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• a third connection section, a proximal end of which is connected to the second section by a second fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• a fourth lateral connection section comprising a distal end, and a proximal end connected to the third section by a third fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad;
• and
• the at least second lateral connection, the third connection, and the fourth lateral connection sections and/or the first, second and third folds being arranged to substantially form a “U”, in such a way that the connection part can fit on the anchoring part in the form of a peg, and thus prevent the lifting by a pinching of said peg,
• the connection part comprising a fifth connection section comprising a distal end configured as an overfolded loop, and a proximal end connected to the fourth section by a fourth fold, the folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad, the fifth connection section extending in a direction opposite to the first support section, so as to produce a support tab capable of pressing on the pressing face of the fixed support.

An axial elastic return spring for axially returning a brake pad of a disc brake from an active position to an inactive position, said spring being intended to be interposed between the brake pad and a fixed support, said spring comprising:

• an elastic deformation portion, arranged to produce a reaction force during pressing of said pad in the active position, so as to return translationally said brake pad to the inactive position;
• a carrier portion arranged to be fastened on the fixed support of the disc brake, and which is integral with the deformation portion;
• a pad portion arranged to be fastened to the brake pad, in the form of a fastening tab, which is integral with the deformation portion and which extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad;
• the carrier portion including a support part having a first support section which:
• is integral with the deformation portion;
• extends in a plane orthogonal to the direction of axial sliding (A) of the brake pad;
• and
• is arranged to press axially on the fixed support under the effect of the deformation of the spring when the brake pad leaves its inactive position,
• and the carrier portion comprises a connection part comprising at least one connection fold arranged and configured to press on an anchoring part carried by a transverse face of the fixed support, and cooperate with said anchoring part to prevent lifting of said connection part,
• the connection part comprising a second connection section, a proximal end of which is connected to the first support section by at least one connection fold, a folding axis of which is orthogonal to the axial direction (A) of the displacement of the brake pad, the second section extending substantially parallel to the first support section so as to be able to be inserted under a projection of the anchoring part in the form of a peg, and thus prevent the lifting by an axial pressing applied under said projection,
• whereby when the brake pad leaves its inactive position, the first support section, during a displacement M1, is arranged to press axially on the fixed support with an axial pressing force T1 under the effect of the deformation of the spring, and the connection part is arranged to held the spring in position due to the pressing T2 under the projection of the anchoring part which thus opposes a lifting M2 of the connection part and by a lever effect around a radial direction passing through the support part, due to the axial pressing force T1, the elasticity of the spring thus exerts an axial lifting force T2, on the carrier, and an axial return force, TO, on the brake pad, to return the brake pad to the inactive position.