EP3341626A1

EP3341626A1 - Brake piston and disc brake operated pneumatically or by electric motor

Info

Publication number: EP3341626A1
Application number: EP16753338.9A
Authority: EP
Inventors: Jens Fricke; Andreas Petschke; Michael Hidringer
Original assignee: Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Current assignee: Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Priority date: 2015-08-28
Filing date: 2016-08-12
Publication date: 2018-07-04
Also published as: DE102015114349A1; WO2017036762A1

Abstract

The invention relates to a brake piston (1) of a disc brake of a utility vehicle which can be operated pneumatically or by an electric-motor, comprising an actuating spindle (6) having a threaded pipe (61) and an adjusting spindle head (62) and a pressure piece (7) arranged on the adjusting spindle head (62), said pressure piece (7) having several parts, in particular two parts. A coupling part (71) of the pressure piece (7) is arranged on the adjusting spindle head (62) and an attachment part (72) of the pressure piece (7) can be placed in a detachable manner on a surface (711) of the coupling part (71) facing away from the adjusting spindle head (62). The invention also relates to a disc brake.

Description

Brake pistons and pneumatically or electromotively actuated

disc brake

The present invention relates to a brake piston of a pneumatically or electromotively operable disc brake of a commercial vehicle according to the preamble of claim 1 and a disc brake of a commercial vehicle according to the preamble of claim 14.

Disc-type disc brakes of commercial vehicles which can be actuated pneumatically or by way of electric motor as well as brake punches inserted therein are known, for example, from DE 10 2012 009 901 A1.

In order to carry out a brake lining change, the brake plungers are reset by means of an adjusting device in an initial position axially to the axis of rotation of the adjusting spindles of the brake plunger to provide sufficient space in the lining shaft of a brake disc cross-caliper to new brake pads with opposite brake pads thicker friction linings to use in the lining shaft. If the lining carrier plates of these brake linings are provided with interference contours or undercuts, then the lining shaft opening of the brake caliper must be taken into account by displacing the caliper or by a sufficiently wide shaft dimension. If such lining carrier rear sections are arranged on the lining carrier plate only one of the brake linings arranged on both sides of the brake disc, a specific assembly sequence involving a displacement of the brake caliper must be observed.

The object of the present invention is to provide a brake piston of a pneumatically or electromotively operable disc brake of a commercial vehicle and a disc brake, which simpler replacement the brake pads, in particular without having to make the caliper during removal or installation of the brake pads allows.

This object is achieved by a brake plunger with the features of the claims 1, 5 and 7 and by a pneumatically or electromotively actuated disc brake of a commercial vehicle with the features of claim 14.

According to a first preferred embodiment of a brake plunger according to the invention, the pressure piece arranged on an adjusting spindle head of an adjusting spindle, which presses the respective brake lining against the brake disk during operation, is designed in several parts, in particular in two parts. In this case, a coupling part of the pressure piece is arranged on the adjusting spindle head and an attachment part of the pressure piece is arranged reversibly detachably and attachably on a surface of the coupling part facing away from the adjusting spindle head.

Due to the two-part design of the pressure piece, it is possible in a simple manner to provide after the reset of the brake pad in its initial position additional mounting space, characterized in that the attachment part can be removed from the pressure piece, whereby the installation space for

Installation of the brake pads is increased. An expansion of the shaft dimension of the caliper and an associated increase in the disc brake, in particular an extension of the caliper in the direction of the axis of rotation of the brake disc can be avoided.

According to an advantageous development, the coupling part has, on a side facing away from the adjusting spindle head, an axially extending T-piece with a cylindrical neck part extending from an end face of the coupling part facing toward the attachment part and an adjoining radially widened holding plate, wherein the T Piece in a correspondingly shaped T-shaped groove on a coupling part facing the end face of the attachment part radially to a rotational axis of the threaded tube can be inserted.

As a result, the two components of the pressure element are held together in a form-fitting manner axially with respect to the axis of rotation of the threaded tube, whereby the attachment can be removed from the lining shaft opening perpendicular to the axis of rotation of the threaded tube from the coupling part or can be inserted into the groove of the coupling part for mounting , In order to fix the coupling part with the attachment part in the operating position radially to one another, according to a further preferred embodiment, a recess for radially positive reception of the holding plate is formed in the groove.

According to an alternative embodiment variant of the multipart, in particular two-part pressure piece, the attachment part can be placed on the coupling part axially to the axis of rotation of the threaded tube. In this case, the attachment and the coupling part are formed on mutually facing end faces with axially extending to the axis of rotation of the threaded tube surveys and the cross section of the elevations corresponding recesses for the radial fixation of the coupling part with the attachment part.

In an alternative embodiment of a brake system according to the invention, the pressure piece on the adjusting spindle head is held in a form-fitting manner axially relative to the axis of rotation of the threaded tube and can be removed from the adjusting spindle head radially to the axis of rotation of the threaded tube.

Also with this embodiment, a simple feasible decrease of the pressure piece for disassembly or assembly of the brake pads is possible.

Particularly preferably, the adjusting spindle head in this embodiment is designed as an axially extending T-piece with a cylindrical neck portion extending from an end face of the adjusting spindle facing the pressure piece and an adjoining radially widened retaining plate, the T piece being cut into a correspondingly shaped T-piece. shaped groove of a neck portion of the pressure piece can be inserted.

It is also conceivable kinematic reversal of this arrangement, so that the T-shaped groove is formed in the adjusting spindle head and the axially extending T-piece is formed according to the neck portion of the pressure piece.

According to a further alternative embodiment, with an increase in the space in the lining shaft for disassembly or assembly of brake pads is possible, the pressure piece and the adjusting spindle head of an operating position in which the brake piston has an axial operating length, in a service position in which Brake plunger has an opposite the operating length shortened axial service length, one inside the other. In contrast to the previous embodiments, the thrust piece or a part of the pressure piece does not have to be removed, but is designed so that it can be displaced in two different positions in the axial direction of a threaded tube of the adjusting spindle in cooperation with a correspondingly formed adjusting spindle head.

According to a first preferred embodiment variant, the pressure piece has a pressure plate, from which first bearing segments rise on a side surface. The adjusting spindle head has second bearing segments correspondingly formed on the first bearing segments, wherein the first and second bearing segments are arranged axially adjacent to each other in the operating position and axially adjacent to the axis of rotation of the threaded tube in the service position. A corresponding rotational movement of the pressure piece can be made by means of a suitable tool through the lining shaft opening in the brake caliper.

Particularly preferred here are the support segments in cross-section, perpendicular to the axis of rotation of the threaded tube, formed annular-segment-shaped. In the center of the first and second support segments, a centering pin is formed axially to the axis of rotation of the threaded tube, which rises above the support surface of the support segments. According to an alternative embodiment variant of the displaceable pressure piece, the pressure piece has a pressure plate on whose one side surface a receiving ring for receiving the adjusting spindle head designed as a cylindrical elevation is formed. In this case, a lateral surface of the adjusting spindle head has a groove in which a retaining clip can be guided. In the operating position of the brake temple, the retaining clip is attached here to the groove, wherein an end edge of the receiving ring of the pressure piece rests on the retaining clip. In the service position, however, the retaining clip is removed from the adjusting spindle head. In this case, the front edge of the receiving ring of the pressure piece is pushed onto a level surrounding the adjusting spindle head.

Also, this embodiment allows an easy-to-carry adjustment of the pressure piece from an operating position to the service position and vice versa. According to a further alternative embodiment of the displaceable pressure piece, a lateral surface of the adjusting spindle head has at least one groove in which at least one guided by perpendicular to the axis of rotation of the threaded tube holes in the receiving ring guided pen can be inserted. In the operating position of the brake plunger, the at least one pin is guided in the groove and the holes in the receiving ring, wherein an end edge of the receiving ring of the pressure piece is arranged spaced from the Stellspindelkopf bordering step, while in the service position of the at least one pin from the holes in the receiving ring is removed, so that the front edge of the receiving ring of the pressure piece can be pushed onto the edge surrounding the adjusting spindle head.

Particularly preferred four holes for receiving a total of two pins are formed in the receiving ring, which additionally strengthens the position of the pressure piece relative to the adjusting spindle head.

According to a further alternative embodiment variant of the displaceable pressure piece, the pressure piece has a pressure plate, on one side of which a receiving ring for receiving the adjusting spindle head formed as a cylindrical projection is integrally formed, wherein a lateral surface of the adjusting spindle head is stepped with a diameter-tapered region the circumferentially circular segment-shaped elevations are arranged.

An annular spacer element engages circumferentially around the tapered region, wherein the inner edge of the spacer element is adapted to the elevations in a stepped manner, so that in the operating position of the brake plunger the spacing element and the elevations are arranged axially one above the other relative to the axis of rotation of the threaded tube. In this case, the spacing element is clamped between an end edge of the receiving ring of the pressure piece and the elevations. In contrast, in the service position, the spacing element and the elevations are arranged so as to be positively interlocking axially with respect to the axis of rotation of the threaded tube, the spacing element being clamped between an end edge of the receiving ring of the pressure piece and a step surrounding the adjusting spindle head. Also with this embodiment, a simple feasible change in position of the pressure piece is made possible relative to the adjusting spindle head of the service position in the operating position and vice versa. In the case of the pneumatically or electromotively operable disc brake of a commercial vehicle, the brake stamp or punches are designed in accordance with one of the embodiments described above.

Additionally or alternatively, the disc brake according to the invention is characterized in that the brake plunger is formed by an operating length in a service length shortened. Particularly preferably, the brake plunger of an operating length by at least half the thickness d of at least one pad carrier plate of a brake lining in a service length shortened formed.

Hereinafter, preferred embodiments are described in more detail with reference to the accompanying drawings. Show it:

Figure 1 is a plan view of a generic disc brake with

Representation of a caliper, a disc brake and brake pads arranged on both sides of the disc brake and brake stamp with threaded spindles and thrust pieces, which are arranged adjacent to one of the brake pads,

FIG. 2 shows a perspective illustration of a first embodiment variant of a multi-part pressure piece arranged on an adjusting spindle head,

Figure 3 perspective views of the multipart pressure piece of FIG

2 in the disassembled state,

FIG. 4 shows a side sectional view of the embodiment variant of the adjusting spindle head and of the multipart pressure piece shown in FIG. 2, a perspective view of a further embodiment variant of a multipart pressure piece,

characters

6 and 7 perspective views of further embodiments of attachment parts of a multi-part pressure piece, 8 shows a perspective view of a further embodiment variant of a brake stamp according to the invention with a one-piece pressure piece in the removed state, FIG. 9a shows a perspective view of a further embodiment variant of a brake stamp according to the invention in the service position,

FIG. 9b shows the brake plunger from FIG. 9a in the operating position and FIG. 9c shows a perspective view of the brake plunger according to FIG. 9a as an exploded view,

characters

FIGS. 9a-9c show corresponding perspective views of a further alternative embodiment of a brake stamp according to the invention, FIGS.

FIG. 10d shows a side sectional view of the brake stamp shown in FIG. 10a,

10e shows a side sectional view of the brake stamp shown in FIG. 10b, FIG.

characters

FIGS. 10d, 10e and 10c show corresponding illustrations of a further embodiment variant of a brake stamp according to the invention, FIGS.

characters

12a-12c Figures 1 1 a - 1 1 c corresponding representations of another preferred embodiment of an inventive

Brake temple.

In the following description of the figures, terms such as above, below, left, right, front, back, etc. refer exclusively to the exemplary representation and position of the brake punch, the adjusting spindle, the adjusting spindle head, the pressure piece, the coupling part, of the attachment and the like. These terms are not meant to be limiting ie, by different working positions or the mirror-symmetric design or the like, these references may change.

In the figure 1 is denoted by the reference numeral 2, a caliper of a pneumatically or electrically operated disc brake of a commercial vehicle. The brake caliper 2 engages over a brake disk 5. On both sides of the brake disk 5, respective brake pads 3, 4 are arranged with respective lining carrier plates 31, 41 and friction linings 32, 42 fixed thereto. An application device with at least one, in this case two brake punches 1, each with one adjusting spindle 6, which carries a respective pressure element 7, presses on triggering a

Braking process the application-side brake pad 4 against the brake disc 5, while the reaction-side brake pad is pressed by moving the brake caliper 2 against the brake disc 5. The brake plungers 1 are further connected via an adjusting device 8, which is in operative connection with the adjusting spindle 6, for the adjustment of a clearance due to wear.

In order to have sufficient space available for a change of the brake linings 3, 4 in the case of service, the adjusting device 8 is initially returned to a starting position in such a service case. As a result, the brake plungers 1 and with them the pressure pieces 7 are moved away from the brake disk 5.

The installation space available in this position is sufficient to remove or insert brake linings from the lining shaft of the brake caliper 2 radially to the axis of rotation of the brake disk 5 or to the axis of rotation of the adjusting spindles 6. However, if the brake linings, in particular the lining carrier plates of the brake linings, are provided with lining interlacings, the space available at that time for disassembly and for the subsequent assembly of new brake linings with correspondingly thick friction linings is insufficient.

According to the invention, therefore, the brake plunger 1 of an operating length WL, for example shown in Figures 9b, 1 1 b, 12b in a service length SL, shown in Figures 9a, 1 1 a and 12a, shortened. Particularly preferably, the brake plunger 1 is shortened from an operating length WL by at least half the thickness d of the lining carrier plate 31, 41 into the service length SL. The additionally created by the shortening of the brake stamp 1 Space is sufficient to make brake pads with Belaghinterschnitten without Schachtmaßerweiterungen in the brake caliper 2.

In the following, different variants of brake stamps 1 are described in more detail, with which such shortening of the brake plungers 1 is made possible.

In a first embodiment variant, shown in FIGS. 2-7, a brake stamp 1 with an adjusting spindle 6 is shown on a threaded tube 61 and an adjusting spindle head 62 and a pressure element 7 arranged on the adjusting spindle head 62, in which the pressure element 7 is in several parts, in particular is formed in two parts.

In this case, a coupling part 71 of the pressure piece 7, for example, in the exploded view of Figure 3, arranged on the adjusting spindle head 62 and an attachment part 72 of the pressure piece 7 is reversibly on a the spindle head 62 facing away surface 71 1 of the coupling member 71 removably and attachably arranged. The coupling part 71 is, as shown in FIG. 2, provided with a cylindrical neck part 714 which encompasses a cylindrical head piece 62 of the adjusting spindle 6. Between the adjusting spindle head 62 and the receiving ring 714 of the coupling part 71, a bearing element such as a sliding bearing is arranged, so that the pressure piece 7 is rotatable relative to the adjusting spindle 6 about the longitudinal axis of the threaded tube 61 of the adjusting spindle 6. A mounted on the outer surface of the receiving ring 714 bellows 9 is characterized on a surface which is not rotated in the wear-related adjustment of the adjusting spindle 6.

For coupling the coupling part 71 with the attachment part 72, as can be seen in FIGS. 2-5, on an end of the coupling spindle head 62 remote from the actuator head 71 there is an axially extending T-piece with a part extending from one

Attachment part 72 facing end face 71 1 of the coupling part 71 extending cylindrical neck portion 712 and an adjoining radially expanded holding plate 713 arranged, preferably integrally formed in a correspondingly shaped T-shaped groove 723 on a coupling part 71 facing end face 721 of the attachment part 72 radially a rotation axis of the threaded tube 61 is inserted. While in the embodiment shown in Figures 2 and 3, the axial length of the neck portion 712 is sized so that it corresponds to the depth of the groove 723 of the attachment part 72, in the particular embodiment shown in Figures 4 and 5, the axial length of the neck piece 712 slightly longer. Accordingly, in the groove 723 of the attachment part 72, a recess 724 for radially positive reception of the holding plate 713 is formed, in which the holding plate 713 is axially engageable upon reaching its predetermined radial end position to the longitudinal axis of the adjusting spindle 6. As a result, on the one hand, the coupling part 71 and the attachment part 72 perpendicular to

Longitudinal axis of the threaded tube 61 positively fixed in the working position. Second, this embodiment has the advantage that when sliding or pushing off the attachment part 72 of the coupling part 71, the facing surfaces 71 1, 721 of the two parts do not rub against each other.

FIGS. 6 and 7 show, by way of example, further variants of an attachment part 72 which, in this case, can be placed on the coupling part 71 axially to the axis of rotation of the threaded tube 61. In this case, the attachment part 72 and the coupling part 71 (not shown in Figures 6 and 7) facing each other end surfaces 71 1, 721 with axially to the axis of rotation of the threaded tube 61 extending elevations 725, 726 and the elevations 725, 726 in cross-section corresponding recesses radial fixation of the coupling part 71 formed with the attachment part 72. The thickness of the attachment part 72 preferably corresponds to at least half the thickness d of the lining carrier plate 31, 41 of the brake linings 3, 4.

In the embodiment variant of a brake stamp 1 according to the invention shown in FIG. 8, the pressure piece 107 is integrally formed and positively held on the adjusting spindle head 62 axially with respect to the axis of rotation of the threaded tube 161 and radially detachable from the adjusting spindle head 1 62 radially to the axis of rotation of the threaded tube 161.

In this embodiment, the adjusting spindle head 162 is accordingly formed similar to the coupling part shown in FIG. The adjusting spindle head 162 has here as a T-piece extending axially with an end face 163 of the adjusting spindle 106 facing away from the pressure piece 107 cylindrical neck portion 164 and an adjoining radially expanded support plate 165, wherein the T-piece in a correspondingly shaped t-shaped groove 173 of a neck portion 172 of the pressure member 107 is inserted. Also in this embodiment, it is conceivable that the neck portion 164 of the adjusting spindle head 162 according to the embodiment shown in Figures 4 and 5 slightly longer shape and accordingly make a groove in the groove 173 centrally, in which the holding plate 165 is correspondingly receivable.

FIGS. 9-12 show alternative embodiment variants of a brake stamp 1 according to the invention, with respective adjusting spindles 206, 306, 406, 506 with a threaded tube 261, 361, 461, 561 and an adjusting spindle head 262, 362, 462, 562 and one on the adjusting spindle head 262, 362, 462, 562 arranged pressure piece 207, 307, 407, 507. All these variants in common is that the pressure piece 207, 307, 407, 507 and the adjusting spindle head 262, 362, 462, 562 from an operating position in which the Brake ram 1 has an axial operating length WL, in a service position, in which the brake ram 1 has a relation to the operating length WL shortened axial service length SL, are inein- mutually displaced.

Thus, in the embodiment variant shown in FIGS. 9a-9c, the pressure piece 207 has a pressure plate 271, from which first bearing segments 272 rise on a side surface. The adjusting spindle head 262 has second bearing segments 263 correspondingly shaped to the first bearing segments 272.

The first and second support segments 272, 263 are arranged in the operating position, as shown in Figure 9b, axially to the axis of rotation of the threaded tube 261 on top of each other.

In the service position, however, as shown in Figure 9a, the first and second support segments 272, 263 are arranged axially adjacent to the axis of rotation of the threaded tube 261, resulting in the shortened service length SL.

As shown in the exploded view in Figure 9c, the support members 272, 263 in cross-section, that is perpendicular to the axis of rotation of the threaded tube 261, preferably formed circular ring segment. Furthermore, in the center of the first or second support segments 272, 263, a centering pin 264 is arranged axially relative to the axis of rotation of the threaded tube 261, which projects beyond the contact surfaces of the support segments 272, 263, whereby the correct operating position of the two components can be recognized in a simple manner is. In the service position, the support segments 272, 263 mesh with one another like a tooth, wherein the individual support segments 272, 263 preferably have a width, so that they each cover an angle of 90 °. By raising the pressure plate 271 and turning by 90 °, the pressure piece from the service position to the operating position and vice versa to adjust.

In the preferred embodiment variant of a brake stamp 1 according to the invention shown in FIGS. 10a-10e, the service position with shortened brake stamp 1 is shown in FIGS. 10a and 10d, while FIGS. 10b and 10e show the operating position of the brake stamp 1. Figure 10c shows an exploded view of this embodiment.

Also in this embodiment, the pressure piece 307 has a pressure plate 371, on one side surface of a receiving ring 372 is formed for receiving the trained as a cylindrical elevator spindle head 362. A circumferential surface 363 of the adjusting spindle head 362 has a circumferential or at least partially circumferential groove 364, in which a retaining clip 308 can be guided.

In the operating position of the brake punch 1 shown in Figures 10b and 10e, the retaining clip 308 is attached to the groove 364, wherein a front edge 374 of the receiving ring 372 of the pressure piece 307 rests on the retaining clip 308 and thereby the pressure piece 307 by a predetermined amount to the front (in the application direction in the direction of the brake disk 5) is placed on the adjusting spindle head 362.

To change to the service position (shown in Figures 10a and 10d), the retaining clip 308 is preferably removed by means of a tool from the adjusting spindle head 362 so that the end edge 374 of the receiving ring 372 of the pressure piece 307 can be pushed onto a Stellspindelkopf 362 bordering stage 365 and after Shift on this rests. In the case of the further preferred embodiment of a brake stud 1 according to the invention shown in FIGS. 11a-11c, the pressure piece 407 also has a pressure plate 471 on one side surface of which a receiving ring 472 for receiving the adjusting spindle head 462 designed as a cylindrical elevation is formed is. The lateral surface 463 of the adjusting spindle head 462 here likewise has a groove 464, in which at least one pin 408 guided in the receiving ring 472 through at least one bores 473 extending through the bores 473 perpendicular to the axis of rotation of the threaded tube 461 can be inserted. Preferably, four holes 473 are formed in the receiving ring 472 for receiving a total of two pins 408, as can be seen in Figure 11c.

In the operating position of the brake punch 1 shown in FIG. 11 b, the pins 408 are guided in the respective groove 464 and the holes 473 in the receiving ring 472. In this case, an end edge 474 of the receiving ring 472 of the pressure piece 407 is arranged spaced from a Stellspindelkopf 462 bordered step 465, while in the service position, the pins 408 are removed from the holes 473 in the receiving ring 472 and thereby the front edge 474 of the receiving ring 472 of the pressure element 407 on the adjusting spindle head 462 bordering step 465 can be pushed and rests after this shift 465 on this stage.

In the yet further preferred embodiment variant of a brake stamp 1 according to the invention shown in FIGS. 12a-12c, the pressure piece 507 has a pressure plate 571, on one side surface of which a receiving ring 572 for receiving the adjusting spindle head 562 designed as a cylindrical elevation is formed. A lateral surface 563 of the adjusting spindle head 562 is here formed in stages with a diameter-reduced region 574. At the tapered portion 574 circumferentially annular segment-shaped elevations 565 are arranged, in particular integrally formed. For adjusting the brake pad 1 from an operating position, as shown in FIG. 12b, to a service position, as shown in FIG. 12a, an annular spacer element 508 is provided, which supports the tapered bearing element 508. employs 574 circumferentially embraces. The inner edge of this spacing element 508 is adapted to the elevations 565 in a stepped manner, so that a tooth-like meshing also results here similar to the embodiment variants shown in FIGS. 9a to 9c.

As can be seen in FIG. 12b, in the operating position of the brake stamp 1, the spacing element 508 and the elevations 565 are arranged axially one above the other relative to the axis of rotation of the threaded tube 561. The spacer element 508 is clamped between a front edge 573 of the receiving ring 572 of the pressure piece 507 and the elevations 565.

In the service position, as shown in FIG. 12a, the spacing element 508 and the elevations 565 are arranged in a form-fitting manner with one another in a form-fitting manner axially relative to the axis of rotation of the threaded tube 561. In this case, the spacing element 508 is clamped between an end edge 573 of the receiving ring 572 of the pressure piece 507 and a step 565 which surrounds the adjusting spindle head 562.

Reference numeral list brake stamp

Brake caliper brake pad

Backing plate

Friction lining brake lining

Backing plate

Friction lining brake disc adjusting spindle / brake stamp

threaded pipe

Adjusting spindle head pressure piece

coupling part

area

neck

Retaining plate

Cylindrical collar / retaining ring attachment

face

T-shaped groove

recess

survey

Collection adjustment device

bellow

Pressure piece

threaded pipe - 16 -

162 adjusting spindle head

163 face

164 neck part

165 retaining plate

172 neck part

173 T-shaped groove

206 adjusting spindle

207 pressure piece

261 threaded pipe

262 adjusting spindle head

263 second edition segments

271 pressure plate

272 first edition segments

306 adjusting spindle

307 pressure piece

308 retaining clip

361 threaded pipe

362 adjusting spindle head

363 lateral surface

364 groove

365 bordering step

372 pick ring

374 forehead edge

406 adjusting spindle

407 pressure piece

408 pen

461 threaded pipe

462 adjusting spindle head

463 lateral surface

464 groove

465 edged stage

471 pressure plate

472 pick ring

473 bore

474 front edge ,

506 adjusting spindle

507 pressure piece

508 annular spacer element

561 threaded pipe

562 adjusting spindle head

563 lateral surface

565 ring-shaped elevations

571 pressure plate

572 receiving ring

573 front edge

574 tapered area

WL operating length

SL Service length d Thickness of the lining carrier plate

Claims

claims

A brake stamp (1) of a pneumatically or electromotively operable disc brake of a commercial vehicle, comprising an adjusting spindle (6, 106, 206, 306, 406, 506) with a threaded tube (61, 161, 261, 361, 461, 561) and an adjusting spindle head (62 , 162, 262, 362, 462, 562) and a pressure piece (7, 107, 207, 307, 407, 507) arranged on the adjusting spindle head (62, 162, 262, 362, 462, 562), characterized in that Pressure piece (7) of several parts, in particular formed in two parts, wherein a coupling part (71) of the pressure piece (7) on Stellspindelkopf (62) is arranged and an attachment part (72) of the pressure piece (7) reversible on a Stellspindelkopf (62) facing away from the surface (71 1) of the coupling part (71) is removable and attachable.

Brake ram (1) according to claim 1, characterized in that the coupling part (71) on an actuating spindle head (62) facing away from an axially extending T-piece with one of the attachment part (72) facing end face (71 1) of the Coupling part (71) extending cylindrical neck portion (712) and an adjoining radially expanded holding plate (713) which in a correspondingly shaped t-shaped groove (723) on a coupling part (71) facing end face (721) of the attachment ( 72) radially to a rotational axis of the threaded tube (61) can be inserted.

Brake ram (1) according to claim 2, characterized in that in the groove (723) has a recess (724) for radially positive reception of the holding plate (713) is formed.

The brake stamp (1) according to claim 1, characterized in that the attachment part (72) can be placed on the coupling part (71) axially to the axis of rotation of the threaded tube (61), wherein the attachment part (72) and the coupling part (71) on mutually facing end faces (71 1, 721) with corresponding to the axis of rotation of the threaded tube (61) extending projections (725, 726) and the cross section of the projections (725, 726) corresponding recesses for radial fixation of the coupling part (71) formed with the attachment part (72) are.

Brake ram (1) according to the preamble of claim 1, characterized in that the pressure piece (107) on the adjusting spindle head (62) axially to Drehach- se of the threaded tube (161) is held positively and radially to the axis of rotation of the threaded tube (161) of the adjusting spindle head (162) is removable.

6. brake stamp (1) according to claim 5, characterized in that the adjusting spindle head (162) as an axially extending T-piece with a of the pressure piece (107) facing end face (163) of the adjusting spindle (106) extending cylindrical Neck part (164) and an adjoining radially expanded holding plate (165) is formed, which in a correspondingly shaped T-shaped groove (173) of a neck portion (172) of the pressure piece (107) can be inserted.

7. brake stamp (1) according to the preamble of claim 1, characterized in that the pressure piece (207, 307, 407, 507) and the adjusting spindle head (262, 362, 462, 562) of an operating position in which the brake stamp (1 ) has an axial operating length (WL), in a service position, in which the brake plunger (1) has a relation to the operating length (WL) shortened axial service length (SL), are slidable into one another.

8. brake stamp (1) according to claim 7, characterized in that the pressure piece (207) has a pressure plate (271) from the first bearing segments (272) rise on a side surface, and that the adjusting spindle head (262) the first In the operating position, the first and second support segments (272, 263) lie axially opposite one another to the axis of rotation of the threaded tube (261) and, in the service position, axially to the axis of rotation of the threaded tube (261). are arranged side by side.

9. brake stamp (1) according to claim 8, characterized in that the support segments (272, 263) in cross-section, perpendicular to the axis of rotation of the threaded tube (261), are formed circular ring segment, wherein in the center of the first or second support segments (272 , 263) elevates a centering pin (264) axially of the axis of rotation of the threaded tube (261) over the bearing surfaces of the bearing segments (272, 263).

10. brake stamp (1) according to claim 7, characterized in that the pressure piece (307) has a pressure plate (371), on whose one side surface a receiving ring (372) for receiving the cylindrical elevation fancy A spindle surface (363) of the adjusting spindle head (362) has a groove (364) in which a retaining clip (308) can be guided, wherein in the operating position of the brake stamp (1) the retaining clip (308) on the groove (364) is attached, wherein an end edge (374) of the receiving ring (372) of the pressure piece (307) on the retaining clip (308) rests and in the service position, the retaining clip (308) from the adjusting spindle head (362) is removed , wherein the end edge (374) of the receiving ring (372) of the pressure piece (307) on a the actuating spindle head (362) bordering step (365) is pushed.

1 1. Brake ram (1) according to claim 7, characterized in that the pressure piece (407) has a pressure plate (471) on one side surface of a receiving ring (472) for receiving the formed as a cylindrical elevation adjusting spindle head (462) is integrally formed, wherein a lateral surface (463) of the adjusting spindle head (462) has at least one groove (464) in which at least one pin (408) guided in the receiving ring (472) by means of bores (473) running perpendicular to the axis of rotation of the threaded tube (461) can be inserted; Operating position of the brake stamp (1) of the at least one pin (408) in the groove (464) and the holes (473) in the receiving ring (472) is guided, wherein a front edge (474) of the receiving ring (472) of the pressure piece (407) of a step (465) bordering the adjusting spindle head (462) is arranged at a distance and in the service position the at least one pin (408) is removed from the bores (473) in the receiving ring (472), the end edge (474) being of the receiving ring (472) of the pressure piece (407) on the actuating spindle head (462) bordering step (465) is pushed.

12. brake stamp (1) according to claim 1 1, characterized in that in the receiving ring (472) four holes (473) for receiving two pins (408) are formed.

13. A brake stamp (1) according to claim 7, characterized in that the pressure piece (507) has a pressure plate (571), on one side surface of a receiving ring (572) for receiving the formed as a cylindrical elevation adjusting spindle head (562) is integrally formed, wherein a lateral surface (563) of the adjusting spindle head (562) is stepped with a diameter-tapered region (574), arranged on the circumferentially annular segment-shaped elevations (565), in particular integrally formed, wherein an annular Beabstan- tion element (508) the tapered portion (574 ) encompasses circumferentially, wherein the Inner edge of the spacer element (508) to the elevations (565) adapts is stepped, so that in the operating position of the brake stamp (1) the spacer element (508) and the elevations (565) are arranged axially to the axis of rotation of the threaded tube (561) on top of each other, wherein the spacer element (508) is clamped between an end edge (573) of the receiving ring (572) of the pressure piece (507) and the elevations (565) and in the service position the spacer element (508) and the elevations (565) axially to the axis of rotation the threaded tube (561) are arranged in a positive fit with each other, wherein the spacing element (508) between a front edge (573) of the receiving ring (572) of the pressure piece (507) and a clamping spindle head (562) bordering step (565) is clamped.

14. Pneumatically or electromotively operable disc brake of a commercial vehicle, with a brake caliper (5) cross-caliper (2), at least one application device for applying the disc brake by means of a brake ram (1) with an adjusting spindle (6) having a pressure piece (7 ) bears, with which a brake lining (3, 4) with a lining carrier plate (31, 41) and a friction lining (32, 42) against this against the brake disc (5) can be pressed, one with the adjusting spindle (2) in operative connection Adjusting device (8) for adjusting a clearance, characterized in that the brake stamp (1) is designed according to one of the preceding claims.

15. Disc brake according to claim 14 or according to the preamble of claim 14, characterized in that the brake stamp (1) from an operating length (WL) in a service length (SL) is formed shortened.

16. Disc brake according to claim 15 or according to the preamble of claim 14, characterized in that the brake stamp (1) of an operating length (WL) by at least half the thickness (d) of a lining carrier plate (31, 41) in a service length (SL) is formed shortenable.