Return spring of a brake shoe including wear play compensation means, disk brake and replacement kit

A spring (48) for elastically returning a brake shoe (18) of a disk brake (12) axially to an inactive position, said spring (48) including means for compensating wear play (J2) of a friction lining (24) of the brake shoe (18) that are deformed plastically when a travel of the brake shoe in an axial direction of movement as far as an active braking position is greater than a particular operating clearance (J1),

• the return spring (48) successively including:
• a portion (50) for fixing the return spring (48) to the disk brake (14);
• a second rigid branch (B2) a proximal end (B2p) of which is connected to the fixing portion (50) by a first bend (P1) plastically deformable about a first deformation axis (A1) orthogonal to the axial direction (A) of movement of the brake shoe (18) and parallel to the plane in which the second rigid branch (B2) lies;
• and
• a third rigid branch (B3) a proximal end (B3p) of which is connected to a distal end (B2d) of the second rigid branch (B2) by a second bend (P2) plastically deformable about a second deformation axis (A2) parallel to the first deformation axis (A1),
• wherein:
• the return spring (48) includes a fourth rigid branch (B4) a proximal end (B4p) of which is connected to a distal end (B3d) of the third rigid branch (B3) by a third bend (P3) plastically deformable about a third deformation axis (A3) parallel to the first deformation axis (A1) that cooperates directly or indirectly with an associated portion of the brake shoe (18);
• each rigid branch (B2, B3, B4) is a strip that lies globally in a plane parallel to the first deformation axis (A1);
• and
• the fourth rigid branch (B4) is transversely spaced (D) relative to the fixing portion (50).