Disc brake for a utility vehicle and brake pad for a disc brake

Abstract

A disc brake for a utility vehicle includes a brake caliper which engages over a vehicle-side brake disc, which is connected to a stationary brake carrier, and in which two brake pads are arranged which bear against the brake disc on both sides during a braking operation, having in each case one lining carrier plate and one friction lining which is fastened thereto, and of which at least one brake application-side brake pad is positioned in a pad shaft of the brake carrier, which pad shaft is delimited by two brake carrier horns. The lining carrier plate bears against stops of the brake carrier in a manner which is spring-loaded radially in the direction of a mounting opening of the brake caliper. The disc brake is configured in such a way that the brake pad is held on the brake caliper in a radially sprung manner.

Claims

1. A disc brake for a utility vehicle, comprising: a brake caliper which engages over a vehicle-side brake disc and which is connected to a fixed brake carrier and in which two brake pads, which are in abutment during a braking operation at both sides with the brake disc and which each have a lining carrier plate and a friction lining which is secured thereto, are arranged, wherein at least one brake-application-side brake pad is positioned in a pad shaft of the brake carrier delimited by two brake carrier horn-shaped members, the lining carrier plate abuts stops of the brake carrier in a radially-outward direction, the brake pad is retained in a radially resilient manner on the brake caliper, secured to the brake pad, at a peripheral edge facing the assembly opening, is a resilient element which is in engagement with an inherently stable clamping element which is secured to the brake caliper, the resilient element comprises a lining retention spring which is constructed as a leaf spring, and the clamping element comprises a curved lining retention member which bridges the assembly opening in an axial direction of the brake disc, and, the curved lining retention member has two open longitudinal slots which extend in the longitudinal direction and which are arranged parallel with and with spacing from each other, and by which there are formed a central web and prongs which delimit a part-region of the longitudinal edges of the curved lining retention member.

2. The disc brake as claimed in claim 1, wherein the lining retention spring has at least one groove which extends over the width of the lining retention spring and which is constructed to be recessed in the direction of the assembly opening.

3. The disc brake as claimed in claim 2, wherein each prong rests in a groove, whilst the web is positioned on the region of the leaf spring which is formed between the two grooves which are arranged parallel with and with spacing from each other.

4. The disc brake as claimed in claim 2, wherein the web rests in the groove and the prongs are positioned on the regions of the lining retention spring adjacent to the groove.

5. The disc brake as claimed in claim 1, wherein the prongs or the web are each provided in the free end regions thereof with an inclined introduction member.

6. The disc brake as claimed in claim 1, wherein the curved lining retention member is inserted, on the one hand, in a pocket of the brake caliper and is, on the other hand, retained on a hook-shaped receiving member of the brake caliper, the hook-shaped receiving member has at the side thereof facing away from the brake pads a relief in which a peripheral region of the curved lining retention member delimiting a cut-out rests.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of an embodiment of a disc brake according to the invention.

(2) FIG. 2 is a plan view of the disc brake according to FIG. 1.

(3) FIG. 3 is a section through the disc brake along the line in FIG. 2.

(4) FIG. 4 is a sectioned front view of the disc brake according to FIG. 2.

(5) FIGS. 5 and 6 are perspective views of a detail of the disc brake, respectively.

(6) FIG. 7 is a schematic illustration of another embodiment of a disc brake according to the invention.

(7) FIGS. 8 and 9 each show a detail of the disc brake according to FIG. 7, also illustrated in a schematic manner.

DETAILED DESCRIPTION OF THE DRAWINGS

(8) In FIGS. 1 and 2, a disc brake for a utility (commercial) vehicle is illustrated having a brake caliper 1 which engages over a brake disc 2 and which is supported in an axially displaceable manner on a fixed brake carrier 6, with respect to the brake disc 2. Such a disc brake is also known as a sliding caliper disc brake.

(9) The brake carrier 6 has two pad shafts 7, of which one is shown in FIG. 4. A brake pad 3, 3 is retained in these pad shafts 7 in each case, wherein in FIG. 4 a brake-application-side brake pad 3 can be seen.

(10) Each brake pad 3, 3 has a lining carrier plate 4 and a friction lining 5 which is retained thereon, which are pressed during a braking operation at both sides onto the brake disc 2.

(11) As can further be seen very clearly in particular in FIG. 4, the pad shaft 7 is delimited in the peripheral direction of the brake disc 2 by two brake carrier horn-shaped members 8, which have at the sides thereof facing an assembly opening 14 of the brake caliper 1, stops 9 which protrude into the pad shaft 7 and with which the lining carrier plate 4 of the brake pad 3 are in abutment in a resiliently loaded manner with a stepped portion 23 so that the brake pad 3 is secured in the direction of the assembly opening 14. As can also be seen in FIG. 4, the brake pad 3 is positioned with play at least with respect to the base of the lining shaft 7.

(12) FIG. 2 and FIG. 1 show that, for example, the brake-application-side brake pad 3 according to the invention is retained in a radially resilient manner on the brake caliper 1.

(13) To this end, the brake pad 3 has a lining retention spring 10 which is secured to the peripheral edge of the lining carrier plate 4 facing the assembly opening 14 and which is in engagement with a clamping element which is constructed as a curved lining retention member 11.

(14) The lining retention spring 10 is provided in the engagement region of the curved lining retention member 11 with two grooves 18 which are arranged parallel with and with spacing from each other and which extend over the width of the lining retention spring 10. The two grooves are constructed so as to be curved outward, that is to say, in the direction facing away from the lining carrier plate, and in which two prongs 17 of the curved lining retention member 11 are guided, wherein these prongs 17 engage below the lining retention spring 10.

(15) FIG. 5 shows the lining retention spring 10 as a detail, whilst FIG. 6 also illustrates the curved lining retention member 11 as a detail.

(16) In FIG. 6, it can be seen that the prongs 17 are formed by means of two continuous longitudinal slots 15 which are arranged parallel with and with spacing from each other and which are open at one end, whilst the central region which is produced and which is delimited by the longitudinal slots 15 forms a web 16 which, in the assembled position, is positioned on the lining retention spring 10 between the two grooves 18.

(17) FIG. 6 shows particularly clearly that the prongs 17 each have in the free end region thereof an inclined introduction member 22, which members enable the curved lining retention member 11 to be readily pushed onto the lining retention spring 10.

(18) For assembly of the, in this instance, brake-application-side brake pad 3, it is first joined via the assembly opening 14 in the lateral region of the brake carrier 6 outside the pad shaft 7, subsequently pushed in the axial direction of the brake disc 2 into the pad shaft 7, where it is arranged with the graduations 23 below the stops 9, at the same time being supported on the base of the lining shaft 7.

(19) Subsequently, the curved lining retention member 11 is pushed with the prongs 17 thereof below the lining retention spring 10 in the region of the grooves 18, wherein the web 16 comes to rest on the leaf spring 10 between the grooves 18 which are raised with respect thereto.

(20) In this instance, the brake pad 3 is pulled virtually with resilient loading against the stops 9, with play being formed with respect to the base of the lining shaft 7.

(21) In order to secure the lining retention spring 10, but also to secure the lining retention spring 10 of the reaction-side brake pad 3, there are arranged on the peripheral edge of the lining carrier plate 4 facing the assembly opening 14 or the curved lining retention member 11, barbs 19 which extend through through-openings 20 of the lining retention springs 10, 10 and which, with corresponding deformation of the lining retention springs 10, 10, engage behind the undercuts of the barbs 19.

(22) The reaction-side brake pad 3 is pressed with pretensioning of the lining retention spring 10 in correspondence with the curved lining retention member 11 into the associated lining shaft 7 of the brake carrier 6.

(23) In terms of basic structure, the additional embodiment shown in FIG. 7 of a disc brake corresponds to the one shown in FIGS. 1 and 2.

(24) In this instance, however, both the lining retention spring 10 of the brake-application-side brake pad 3 and the curved lining retention member 11 which is connected thereto are constructed differently.

(25) Both the lining retention spring 10 and the curved lining retention member 11 of the embodiment according to FIG. 7 are illustrated in FIGS. 8 and 9.

(26) It can be seen therein that the lining retention spring 10 has only one groove 18 which is curved so as to be directed outward, that is to say, counter to the lining carrier plate 4, and which also extends over the width of the lining retention spring 10 and in which the web rests 16 so as to engage below the lining retention spring 10. The two prongs 17 are in contrast then positioned at both sides of the groove 18 on the lining retention spring 10. For easier assembly, the web 16 also has an inclined introduction portion 22, comparable to the one shown in FIG. 6.

(27) In order to secure the curved lining retention member 11 to the brake caliper 1, the curved lining retention member 11 has a window-like cut-out 21 which engages behind a hook-like receiving member 12 which is formed on the brake caliper 1, whilst the opposing end associated with the prongs 17 or the web 16 is introduced into a pocket 13 of the brake caliper 1.

(28) In order to assemble the curved lining retention member 11, it is guided with the cut-out 21 thereof over the hook-like receiving member 12 and subsequently pushed into the pocket 13 in the direction of the arrows which can be seen in FIGS. 3, 6 and 9 with the opposing end thereof, engaging at the same time under or over the lining retention spring 10, wherein in this position the edge of the cut-out 21 engages behind the undercut of the receiving member 12. For a desired locking of the curved lining retention member 11 in this position, corresponding known measures can be taken.

LIST OF REFERENCE NUMERALS

(29) 1 Brake caliper

(30) 2 Brake disc

(31) 3 Brake pad

(32) 3 Brake pad

(33) 4 Lining carrier plate

(34) 5 Friction lining

(35) 6 Brake carrier

(36) 7 Pad shaft

(37) 8 Brake carrier horn-like member

(38) 9 Stop

(39) 10 Lining retention spring

(40) 10 Lining retention spring

(41) 11 Curved lining retention member

(42) 12 Hook-like receiving member

(43) 13 Pocket

(44) 14 Assembly opening

(45) 15 Longitudinal slot

(46) 16 Web

(47) 17 Prongs

(48) 18 Groove

(49) 19 Barbs

(50) 20 Through-opening

(51) 21 Cut-out

(52) 22 Inclined introduction member

(53) 23 Graduation

(54) The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.