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A fixed caliper brake includes a caliper housing that includes two opposing blocks. Each of the opposing blocks includes an axial recess, an axial surface for supporting a brake pad, and elements for mounting and axially and slidably guiding the brake pad. The elements include a pad spring that is a

A fixed caliper brake includes a caliper housing that includes two opposing blocks. Each of the opposing blocks includes an axial recess, an axial surface for supporting a brake pad, and elements for mounting and axially and slidably guiding the brake pad. The elements include a pad spring that is attached to each related lug of the brake pad, and a steel lamellar element having a spring and being received in the related recess.

대표청구항 ▼

1. A fixed caliper (10) motor vehicle disk brake comprising: a disk,a caliper casing (11) that straddles the disk,at least one brake pad (12) that is adapted to co-operate with a facing lateral face of the disk, andat least one piston (8) that is mounted to slide axially in a complementary cylinder

1. A fixed caliper (10) motor vehicle disk brake comprising: a disk,a caliper casing (11) that straddles the disk,at least one brake pad (12) that is adapted to co-operate with a facing lateral face of the disk, andat least one piston (8) that is mounted to slide axially in a complementary cylinder (7) of the caliper casing and that co-operates with said brake pad (12) to urge it axially in the direction of said lateral face of the brake disk,and wherein:a) the caliper casing (11) comprises two opposite blocks (14), respectively at the front and at the rear, each of which comprises:a C-section axial housing (16), open horizontally in a direction of the opposite block (14), that is delimited by an upper face (32) and by a lower face (34) of horizontal general orientation;an axial bearing surface (20) of vertical (V) general orientation below the C-section axial housing (16);b) the brake pad (12) comprises:two opposite lateral mounting lugs (26) each of which is received in an associated housing (16) of an associated block (14) of the casing (11) of the caliper and each of which is delimited by an upper facet (36) of horizontal general orientation;associated with each lug (26), a vertically oriented lower facet (38) below the associated lateral lug (26);c) said fixed caliper (10) further comprises means (40, 22) for mounting and guiding axial sliding of the brake pad relative to the fixed casing comprising:i) for each lug (26) of the brake pad (12), a pad spring (40) that is fixed to the associated lug (26) of the brake pad (12) and comprises at least one lower sliding branch (42) that co-operates with the lower face (34) of the associated housing (16) and urges said upper facet (36) of the lug (26) vertically upward to bear against the upper face (32) of the associated housing (16);ii) for each block (14) of the caliper casing (11), a spring steel lamellar element (22) which comprises at least:a C-section upper axial sliding part (52) that is received in and locked into the associated housing (16), that comprises a first, lower flange (24), referred to as the sliding flange, of substantially horizontal general orientation, that is disposed between the sliding branch (42) of the pad spring (40) and the lower face (34) of the housing (16) of the caliper (11), and a second, upper flange (25), referred to as the vertical bearing flange, of horizontal general orientation, that is disposed between the upper facet (36) of the associated lug (26) of the brake pad (12) and the upper face (32) of the associated housing (12); andat least one axial bearing lower part (54) comprising a third flange (28), referred to as the transverse bearing flange, that extends the sliding flange (24), that extends in a plane orthogonal to the plane of the sliding flange (24), that is arranged in contact with the transverse bearing surface (20) of the associated block (14), and that is adapted to form a transverse abutment for the associated lower facet (38) of the brake pad (12). 2. The fixed caliper disk brake as claimed in claim 1, wherein the lamellar element (22) is elastically deformable between: an initial state, prior to mounting in the housing (16) of the lug (26) of the brake pad (12) fitted with its pad spring (40), in which the sliding flange (24) forms with the plane of the lower face (34) of the housing (16) a first acute angle (α),at least one loaded state after mounting in the housing (16) of the lug (26) the brake pad (12) fitted with its pad spring (40), in which the sliding flange (24) forms with the plane of the lower face (34) of the housing (16) a zero angle or a second acute angle (β) the value of which is less than that of the first acute angle (α), and in which said sliding branch (42) of the pad spring (40) is elastically prestressed. 3. The disk brake as claimed in claim 2, wherein the sliding flange (24) comprises an anchor tongue (56) that projects downward and co-operates with the lower face (34) of the housing (16) so as to be anchored in this lower face (34) and to lock the upper part (52) in the position mounted in the associated housing (16). 4. The disk brake as claimed in claim 3, wherein the lower face (34) of the housing (16) comprises a recess (37) in which the anchor tongue (56) is received with no clearance in the axial direction so as to immobilize the lamellar element (22) axially relative to the block (14). 5. The disk brake as claimed in claim 4, wherein the lamellar element (22) comprises an axial immobilization part (58) that extends upward the vertical second bearing flange (25) that co-operates with a complementary part (60) of the block (14) so as to immobilize the lamellar element (22) axially relative to the block (14). 6. The disk brake as claimed in claim 5, wherein an edge (66) of the sliding flange (24) connecting it with the transverse bearing flange (28) comprises at least one axial cut-out (68). 7. The disk brake as claimed in claim 6, wherein the lamellar element (22) is of symmetrical design with respect to a vertical median transverse plane. 8. The disk brake as claimed in claim 7, wherein each pad spring (40) comprises at least one curved branch (48) that extends in the axial direction and that connects its sliding branch (42) to a branch (46) of the brake pad for fixing it to the lug (12) of the brake pad. 9. A method of assembling a disk brake as claimed in claim 8, further comprising: a first step during which the lamellar elements (22) are locked into the associated housings (16) of the blocks (14) of the caliper (11),a second step during which the pad springs (40) are fixed to the brake pad (12), the curved branches (48) being arranged on the same side of the brake pad (12),a third step during which the brake pad (12) equipped with its two pad springs (40) is introduced into the housings (16) of the blocks (14) of the caliper (11) so that the curved branches (48) of the pad springs (40) enter first so that said branches of said pad springs (40) load the associated lamellar elements (22) and spread apart the first, lower sliding flanges (24) and the vertical second bearing flanges (25). 10. A method of replacing a brake pad of a disk brake as claimed in claim 8, further comprising: a first step during which the curved branches (48) of the pad springs (40) are compressed,a second step during which the brake pad (12) fitted with its pad springs (40) is extracted from the housings (16) of the blocks (14) of the caliper (11),a third step during which a new brake pad (12) is introduced the lugs (26) of which are equipped with two pad springs (40) in the housings (16) of the blocks (14) of the caliper so that the curved branches (48) of the pad springs (14) enter first so that said branches (48) of said pad springs (40) load the lamellar elements (22) and move the first, lower sliding flanges (24) away from the vertical second bearing flanges (25). 11. The disk brake as claimed in claim 2, wherein the lamellar element (22) comprises an axial immobilization part (58) that extends upward the vertical second bearing flange (25) that co-operates with a complementary part (60) of the block (14) so as to immobilize the lamellar element (22) axially relative to the block (14). 12. The disk brake as claimed in claim 2, wherein the lamellar element (22) is of symmetrical design with respect to a vertical median transverse plane. 13. The disk brake as claimed in claim 2, wherein each pad spring (40) comprises at least one curved branch (48) that extends in the axial direction and that connects its sliding branch (42) to a branch (46) of the brake pad for fixing it to the lug (12) of the brake pad. 14. The disk brake as claimed in claim 1, wherein the caliper casing (11) comprises two half-casings each of which is delimited by a junction face (13) of vertical and transverse orientation and the two half-casings are fixed to each other by a series of axial fixing screws (80). 15. The disk brake according claim 14, wherein the caliper casing (11) and the means for mounting and guiding the brake pads are of generally symmetrical design with respect to said junction face (13). 16. The disk brake as claimed in claim 1, wherein the lamellar element (22) comprises an axial immobilization part (58) that extends upward the vertical second bearing flange (25) that co-operates with a complementary part (60) of the block (14) so as to immobilize the lamellar element (22) axially relative to the block (14). 17. The disk brake as claimed in claim 1, wherein an edge (66) of the sliding flange (24) connecting it with the transverse bearing flange (28) comprises at least one axial cut-out (68). 18. The disk brake as claimed in claim 1, wherein the lamellar element (22) is of symmetrical design with respect to a vertical median transverse plane. 19. The disk brake as claimed in claim 1, wherein each pad spring (40) comprises at least one curved branch (48) that extends in the axial direction and that connects its sliding branch (42) to a branch (46) of the brake pad for fixing it to the lug (12) of the brake pad.