Brake pad and braking unit for capturing particles
Brake pad in an axle disc brake A, the pad comprising a shoe ( 1 ) and a lining made from friction material, the lining being defined by a friction face ( 26 ), a mounting face ( 20 ), an internal edge ( 23 ), an external edge ( 24 ), a front edge ( 21 ), a rear edge ( 22 ), the lining being provided with a collection groove ( 3 ), open on the friction face ( 26 ) and arranged close to the front edge ( 21 ), the shoe comprising a hole ( 17 ) in fluid communication with the collection groove, this hole being connected to a vacuum source via the communication means ( 4 ), the collection groove emerging at one of the edges chosen among the internal and external edges.
1. A brake pad in an axle disc brake, comprising:
a shoe ( 1 ); and
a lining made from friction material,
the lining being delimited by a friction face ( 26 ), a mounting face ( 20 ), an internal edge ( 23 ), an external edge ( 24 ), a front edge ( 21 ), a rear edge ( 22 ),
the lining being provided with a collection groove ( 3 ), open on the friction face ( 26 ) and arranged close to the front edge ( 21 ), and
the shoe comprising a hole ( 17 ) in fluid communication with the collection groove, the hole being connected to a vacuum source via communication means ( 4 ),
wherein the collection groove emerges at only one of either the internal edge or the external edge.
2. The brake pad according to claim 1 , wherein the collection groove is hollowed directly in the friction material, up to a surface area of the shoe.
3. The brake pad according to claim 1 , wherein the collection groove is formed directly in the friction material during a sintering operation, with a groove bottom that corresponds to a surface area of the shoe.
4. The brake pad according to claim 1 , wherein a surface area occupied by the collection groove is less than 5% of a total available surface area on the friction face.
5. The brake pad according to claim 1 , wherein the collection groove extends generally radially in relation to the axle between an open end ( 33 ) and a blind end, the shoe hole emerging at the collection groove close to the blind end ( 31 ),
the hole ( 17 ) of the shoe emerging at the collection groove close to the blind end.
6. The brake pad according to claim 1 , wherein the collection groove is unique and continuous, and the collection groove is of a constant width and is substantially parallel to the front edge of the lining.
7. A braking unit comprising a brake disc ( 9 ), a brake calliper ( 5 ), two brake pads ( 10 A, 10 B) according to claim 1 , and a suction device ( 8 ) pneumatically connected to the collection grooves of the brake pads by the communication means ( 4 ).
8. The braking unit according to claim 7 , wherein the communication means comprise at least one flexible hose ( 40 ).
9. The braking unit according to claim 8 , wherein an end of the flexible hose is fitted into a shoe hole ( 17 ).
10. The braking unit according to claim 7 , wherein the communication means are formed through an internal passage ( 57 ) arranged in a body ( 50 ) of the calliper ( 5 ).
11. The brake pad according to claim 2 , wherein a surface area occupied by the collection groove is less than 5% of a total available surface area on the friction face.
12. The brake pad according to claim 3 , wherein a surface area occupied by the collection groove is less than 5% of a total available surface area on the friction face.
13. The brake pad according to claim 2 , wherein the collection groove extends generally radially in relation to the axle between an open end ( 33 ) and a blind end, the shoe hole emerging at the collection groove close to the blind end ( 31 ), the hole ( 17 ) of the shoe emerging at the collection groove close to the blind end.
14. The brake pad according to claim 3 , wherein the collection groove extends generally radially in relation to the axle between an open end ( 33 ) and a blind end, the shoe hole emerging at the collection groove close to the blind end ( 31 ), the hole ( 17 ) of the shoe emerging at the collection groove close to the blind end.
15. The brake pad according to claim 4 , wherein the collection groove extends generally radially in relation to the axle between an open end ( 33 ) and a blind end, the shoe hole emerging at the collection groove close to the blind end ( 31 ), the hole ( 17 ) of the shoe emerging at the collection groove close to the blind end.
16. The brake pad according to claim 2 , wherein the collection groove is unique and continuous, and the collection groove is of a constant width and is substantially parallel to the front edge of the lining.
17. The brake pad according to claim 3 , wherein the collection groove is unique and continuous, and the collection groove is of a constant width and is substantially parallel to the front edge of the lining.
18. The brake pad according to claim 4 , wherein the collection groove is unique and continuous, and the collection groove is of a constant width and is substantially parallel to the front edge of the lining.
19. The brake pad according to claim 5 , wherein the collection groove is unique and continuous, and the collection groove is of a constant width and is substantially parallel to the front edge of the lining.
20. A braking unit comprising a brake disc, a brake calliper, two brake pads according to claim 2 , and a suction device pneumatically connected to the collection grooves of the brake pads by the communication means.