Parking brake actuation assembly

A brake comprising an assembly comprising:

• a thrust and support element comprising a first thrust end of thrust and support element adapted to cooperate with a first jaw of a brake;
• said thrust and support element comprising a second thrust and support element end;
• a lever rotatably supported to said thrust and support element for rotating at least along a rotation thrust direction;
• said lever comprising a first lever end adapted to cooperate with a second jaw of the brake;
• said lever comprising a second lever end, wherein said second lever end comprises a hooking seat;
• and
• wherein said hooking seat is adapted to firmly receive a connecting portion of a coupling end of a traction cable, said traction cable having a cable body capable of an elastic flexural deformation that allows it to return to the straight position when the bending stress is removed;
• said lever being adapted to rotate only when subjected to the traction action of the traction cable, for acting with the first lever end against said second jaw of brake;
• wherein
• said thrust and support element comprises an inner element wall which at least partly delimits a guide channel;
• and
• said lever comprises a lever inclined wall which at least partly delimits said guide channel;
• wherein a safety distance (D) between a first straight line (R1), parallel to a rectilinear extension of the traction cable in a non-bent position, passing by a lever end located at an end of the coupling end of the lever, and a second straight line (R2), parallel to the rectilinear extension of the traction cable in a non-bent position, passing by an inner wall end located at the end of an inner element wall which substantially faces the lever
• wherein said safety distance (D) is less than a maximum transverse dimension (K) of said coupling end
• D<K
• and wherein said inner element wall and the lever inclined wall therebetween define a minimum distance (d), wherein said maximum transverse dimension (K) is equal or less than the minimum distance (d) between said inner element wall and said lever inclined wall;
• K≥d
• wherein
• said lever comprises a lever abutment surface which cooperates with an abutment counter-surface provided in said thrust and support element to prevent a free rotation of the lever in the opposite direction to said rotation thrust direction;
• said thrust and support element and said second lever end define said guide channel which allows the passage of at least the coupling end when the cable body is elastically bent, to maintain said lever in a stationary position during both assembly or disassembly of the traction cable;
• said guide channel allowing the coupling end to rotate about said second lever end and engage with said hooking seat upon the elastic return of the cable body in a cable body position substantially straight, preventing the rotation of the lever in the opposite direction to said rotation thrust direction when the coupling end rotates about said second lever end.

A brake actuation assembly, comprising:

• a thrust and support element comprising a first thrust end of thrust and support element adapted to cooperate with a first jaw of a brake;
• said thrust and support element comprising a second thrust and support element end;
• a lever rotatably supported to said thrust and support element for rotating at least along a rotation thrust direction;
• said lever comprising a first lever end adapted to cooperate with a second jaw of the brake;
• said lever comprising a second lever end, wherein said second lever end comprises a hooking seat;
• and
• wherein said hooking seat is adapted to firmly receive a connecting portion of a coupling end of a traction cable, said traction cable having a cable body capable of an elastic flexural deformation that allows it to return to the straight position when the bending stress is removed;
• said lever being adapted to rotate only when subjected to the traction action of the traction cable, for acting with the first lever end against said second jaw of brake;
• wherein
• said lever comprises a lever abutment surface which cooperates with an abutment counter-surface provided in said thrust and support element to prevent a free rotation of the lever in the opposite direction to said rotation thrust direction;
• said thrust and support element and said second lever end define said guide channel which allows the passage of at least the coupling end when the cable body is elastically bent;
• said guide channel allowing the coupling end to rotate about said second lever end and engage with said hooking seat upon the elastic return of the cable body in a cable body position substantially straight, preventing the rotation of the lever in the opposite direction to said rotation thrust direction when the coupling end rotates about said second lever end,
• wherein the lever abutment surface and the abutment counter-surface are parallel to a primary direction of the traction cable, and/or wherein the lever abutment surface and the abutment counter-surface are perpendicular to a tangential spring connected to the first and second jaws to recall them away from a inner cylindrical surface of the bell upon the ending of the braking action.

A brake comprising an assembly comprising:

• a thrust and support element comprising a first thrust end of thrust and support element adapted to cooperate with a first jaw of a brake;
• said thrust and support element comprising a second thrust and support element end;
• a lever rotatably supported to said thrust and support element for rotating at least along a rotation thrust direction;
• said lever comprising a first lever end adapted to cooperate with a second jaw of the brake;
• said lever comprising a second lever end, wherein said second lever end comprises a hooking seat;
• and
• wherein said hooking seat is adapted to firmly receive a connecting portion of a coupling end of a traction cable, said traction cable having a cable body capable of an elastic flexural deformation that allows it to return to the straight position when the bending stress is removed;
• said lever being adapted to rotate only when subjected to the traction action of the traction cable, for acting with the first lever end against said second jaw of brake;
• wherein
• said lever comprises a lever abutment surface which cooperates with an abutment counter-surface provided in said thrust and support element to prevent a free rotation of the lever in the opposite direction to said rotation thrust direction;
• said thrust and support element and said second lever end define said guide channel which allows the passage of at least the coupling end when the cable body is elastically bent;
• said guide channel allowing the coupling end to rotate about said second lever end and engage with said hooking seat upon the elastic return of the cable body in a cable body position substantially straight, preventing the rotation of the lever in the opposite direction to said rotation thrust direction when the coupling end rotates about said second lever end,
• wherein the lever abutment surface and the abutment counter-surface are parallel to a primary direction of the traction cable, and/or wherein the lever abutment surface and the abutment counter-surface are perpendicular to a tangential spring connected to the first and second jaws to recall them away from a inner cylindrical surface of the bell upon the ending of the braking action.