WO2018104159A1

WO2018104159A1 - Sound damping element, motor vehicle disc brake pad with sound damping element, and use of same in a motor vehicle disc brake

Info

Publication number: WO2018104159A1
Application number: PCT/EP2017/081113
Authority: WO
Inventors: Herbert Dreher; Dietrich Golz; Martin GÄDKE; Reiner Müller; Uwe Bach; Andreas MARR; Frederic ZIMNOCH; Mathias Haag
Original assignee: Continental Teves Ag & Co. Ohg
Priority date: 2016-12-06
Filing date: 2017-12-01
Publication date: 2018-06-14
Also published as: KR20190082866A; KR102274648B1; DE102017204714A1

Abstract

The invention relates to a damping element in the form of a symmetrical, flat circular steel sheet (10) with a largely constant sheet thickness and two end faces oriented to be substantially plane-parallel to one another, as well as an annular lateral surface (12).

Description

The invention relates to both a damping body, as well as a multi-piece constructed vehicle disc brake pad with damping body and their use in a motor vehicle disc brake. Conventional disc brake pads have a carrier plate (back plate) on the front side of a friction material is fixed, and wherein the back ^¬ ckenplatte carries an additional mass which serves ge ^¬ noisy vibrations from the Kraftfahrzeugscheibenbrems ^¬ covering, so squeaking when braking to prevent. An according to conventional, multi-piece Schei ^¬ benbremsbelag with permanently attached to the back plate damping body is known for example from EP 2 174 034 Bl. The back plate has radially outward on molded eyelets with edge and through hole and the damping body is designed as a block with clamping projection and abutment surface, which as

Turnstile is supported on the edge of the back plate. Both mass and friction material are on the front ^¬ side of the back plate - so friction material - arranged.

The present invention is based on the object to provide a further developed, and thereby rationally improved Ge ^¬ noise reduction measure with an improved damping body, which is even better suited for cooperation with Mehrkolbenscheibenbremssätteln.

To solve the problem in question, the invention provides that the damping body is provided flat as a symmetrical, flat and thin Stahlblechronde 10,10, which over a largely constant sheet thickness s with two mutually substantially plane-parallel end faces 11,11; 21,21, as well as an annular circumferential surface 12,12 has. A particular advantage of the invention is that an application is possible both in a Festsattelbremsbelag as well as an application in a Faustsattelbremsbelag. The inserted Stahlblechronde 10,10 ^s between brake piston 3,4 and back plate 6 evened the Zuspannkrafteinleitung. Further details of the invention will become apparent from dependent claims in connection with the following description with reference to the drawing. In the drawing shows:

1 is a rear perspective view of a bol ^¬ zengeführten disc brake pad 5 with mutually radially offset holding and guide sections in cooperation with two translucent sessile indicated brake piston 3.4,

Fig. 2 as Fig. 1 but as a line drawing,

3 and 4 as FIG. 1 and FIG. 2 but in an exploded view,

5 is a rear view of the disc brake pad 5,

6 is a sectional view along the section line VI-VI in FIG.

Fig. 7 partial view of a

4-piston disc brake caliper 2 of the fixed caliper type for Koope ^¬ ration with a bolt-guided disc brake pad 5 of FIG. 1 - 6, wherein only one saddle half with axially directed retaining pin projection and two piston shields 17, 18 are shown Fig. 8 shows a friction lining mounting part step

Riveting a Stahlblechronde 10 and with applied, pasty decoupling means 16, both on the back 9 of the back plate 6, as well as on the Stahlblechrondenrückseite.

9 Perspective rear view of a afford ^¬ guided, and on the holding and guiding portion hammerhead-shaped disc brake pad 5, in cooperation with two brake pistons 3,4,

10 is a view similar to FIG. 9 with a brake piston 3 shown cut open, FIG. 11 is a perspective view comparable to FIG. 9 + 10, but in an exploded view, FIG.

Fig. 12 rear view of the disc brake pad 5, and Fig. 13 is a sectional view taken along the section line XIII-XIII in

Fig. 12.

For simplicity, in the drawing, as well as in the following description of the figures, each identically duplicated embodied features are each identified and represented with identical reference numerals and additionally by a spread. However, the duplicated use of the features on a disc brake pad 5 is not meant to be limited. Rather, it is conceivable and possible to provide the respective features both singular, so simple, or triple together on a disc brake pad, thereby allowing a suitable adaptation to a corresponding brake piston number of a disc brake, but without departing from the basic principle of the present invention. A fundamentally flat steel sheet metal blank 10,10 "according to the invention takes a constructive distance from the shaping of the known additional masses, and anti-rotation problems are automatically eliminated according to the invention from the friction material 8 - exclusively steel material is installed on a disc brake pad 5. Incidentally, a surprisingly simple item sorting and assembly results, with a simplified visual inspection of the finished Scheibenbremsbe ^¬ lagprodukt.

In application to the multi-piston calipers lead the Stahlblechronden to the particularly advantageous, systematic added-value / bonus effect by parallel side by side axially acting on the same back plate 6 acts

Brake piston 3.4 via the brake piston 3.4 individually assigned, steel blanks 10,10 are effectively decoupled from each other.

The steel sheet metal blank 10, 10 is arranged substantially parallel to the back plate 6 on its rear side 9 so that a tendency to overweight the friction material 8 placed on the front side - as seen over its wear over an average service life - is largely balanced - ie neutralized. Verschwenktendenz from the disc brake pad 5 in relation to its friction lining - ie oblique wear - is thus avoided. Back plate 6 and steel sheet metal 10,10 ^s are bound together secured against each other. Advantageously, the Stahlblechronde 10,10 ^s in relation to the back plate 6 with a predetermined biasing effect floating, so limited by mutual play movable or displaceable on the back ^¬ ckenplatte 6 provided. For pre-montage _n

A separate rivet 14 with a rivet head 15, rivet shank and rivet root is provided between the back plate 6 and the sheet metal blanks 10, 10, and the rivet shank in the embodiment penetrates a through hole 13 in the center Z from the steel sheet metal blank 10 in a form-fitting manner. On the other hand, the rivet 14 is firmly anchored in a recess of the back plate 6. The center Z of the steel sheet metal blank 10, 10 can be arranged coincidentally, that is to say axially aligned with one another, together with a piston axis 22. The steel sheet metal blank 10, 10 is located indirectly or directly on the rear side 9 of the back plate 6. For modalakustisch ver ^¬ improved decoupling an intermediate layer 20 and / or an additional decoupling means 16 between the piston 3,4 and the back plate may be inserted 6 from the disc brake pads 5 in addition to the sheet steel blank, 10.10. There are several Stahlblechronden 10,10 ^s tangentially directed side by side or between steel sheet 10,10 ^seconds and back plate 6 may, for example, labyrinth-like covered or sealed receiving cavities for storing a decoupling paste, so that the paste is not simply flushed out due to contact pressure, spray or cleaning can. For this purpose, the steel sheet metal blank 10. 10 ^s on its back plate side upper end face 21 may be provided with a special surface embossing, a special fine grinding and / or with a microtexturing, which enables or at least supports a reservoir function.

In an embodiment of the invention, each disk brake pad 5 according to the invention has a plurality of steel sheet metal blanks 10, 10 ^s , which sit next to one another and at a distance from one another on the rear side 9 of the back plate 6, and are fixed. Preferably, the Stahlblechronden are 10,10 ^s orthogonal perpendicular to the piston axis 22, so uniformly arranged at the same height with a uniform common escape F horizontally. An effective decoupling for multi-piston brake applications is offered on the basis of a plurality of steel sheet metal blanks 10, 10, which are completely divided from one another, and the disadvantages of a frictional engagement between a plurality of pistons 3, 4 are mechanically prevented as a result of separation. Danger of injury for both workers and fitters is eliminated, and ge ^¬ mutual fixation is improved by the Stahlblechronde with its punching burr of the end face 21 indirectly or directly on the back 9 of the back plate 6 is seated.

The invention is accompanied by the following further advantages. By a factory fixation between steel sheet 10,10 "and back plate is combined a facilitated and at the same time particularly reliable disc brake replacement in reproducible quality offered because the decoupling - damping body - can neither be forgotten by a worker nor incorrectly mounted low-frequency range -.. optimally simply controlled by a sheet steel blank 10,10 to multi-piston administration, the modalakustische separation by means of the piston individually assigned and fixed separately on Rue ^¬ ckenplatte sheet steel blanks 10,10 is offered ^s machines acoustic bridge effect or body sound transmission is therefore inhibited effectively the result. is a maximum decoupling in the pressure force transmission of the various parallel-acting piston 3,4 in their force on the disc brake pad 5, after each sheet metal cam 10.10 ^s per piston 3.4 is used.

The sheet steel blank 10,10 ^s is such floating fixable at Rue ^¬ 6 ckenplatte that the sheet steel blank ^s, transverse to the piston axis 22 in ^¬ nerhalb certain limits (transverse to the axial direction Ax) in principle freely movable 10.10. This includes For example, that the Stahlblechronde 10,10 can be freely rotatably arranged in principle to the central rivet 14, or alternately imprinted on the rivet 14 a predetermined biasing force towards the back plate 6, which is provided dosed optimized for the particular application. The predetermined additional decoupling means 16 may in principle be arranged integrally or separately in pasty form, as an intermediate layer 20 such as a film, or as a dry coating preferably as a varnish between steel sheet metal 10,10 and back plate 6 or fixed on one or more of the peripheral surfaces. to easily optimize or multiply the achieved decoupling effect. By the factory application of the additional decoupling means 16, it is advantageously excluded that a worker performs an application of the additional decoupling means error-prone (wrong product, incorrect amount) or completely forget. Additional decoupling means can in principle on both sides (front sides 11,21 therefore top and bottom) of the 10,10 ^¬ be steel sheet blank as applied in addition, on one end side of the respective pistons 3,4 and / or the back plate surface. The factory fixation of one or more steel blanks 10,10 ^s on the back plate 6, together with the insertion of at least one additional decoupling means 16, such as by Lackbe- layering (dip or spray painting) allows a particularly efficient and cost-saving completion of the disc brake pad fifth in the factory. The mass completion of the disc brake pads 5 in the manufacturing plant, the additional added value is achieved that maintenance, ie workshop costs, namely the labor values of a conventional Dämpfungskörperfixierung, including the corresponding vertical integration in the motor vehicle manufacturer or maintenance operation, is rationalized. ₀

O

The physically decoupled basic idea of the invention can also be provided mirrored, namely in addition to the steel blanks 10,11 or just as an alternative so replacement of the steel blanks 10,10. Accordingly, it is possible that is inserted on a piston end, a piston plate 17,18 as separate Zvi ^¬'s position between the brake pistons 3,4 and disc brake pads 5 without departing from the invention. The piston shield 17,18 is preferably flat or cup-shaped deep-drawn from sheet metal and fixed with retaining tongues or springs factory the brake piston 3.4. If this makes a

Stahl blechronde 10,10 is rationalized on the disc brake pad 5, therefore, a simplified, namely cheaper friction lining design is obtained. However, a fully built-in redundancy aspect of the invention is defined in that the disc brake pads 5 ^s per brake piston depending BremskoIben 3.4 is in connection with we Ver ^¬ ^¬ nigstens a sheet steel blank with a piston plate 10,10 17,18. Through this quasi-systematically redundant decoupling a correspondingly multiple improved, individualized decoupling effect for each of the brake piston 3,4 is achieved. It is understood that the number of decoupling means 16, that is to say the total number of piston shields 17, 18, steel sheet metal blanks 10, 10 ^{s are} generally integer multiples of the number of pistons. Accordingly, in individualized-redundant full training purely by way of example a disc brake caliper 2 with a total of 4 brake pistons 3,4 and 2 friction linings each 2nd

Steel sheet blanks 10.10 ^s on each of the disc brake pads 5 and a total of 4 piston caps and optionally additionally 2 or 4 painted surfaces (bonded coating) per Stahlblechronde 10.10 ^s include, without departing from the spirit of the invention. Naturally, rationalization of one or more features is also conceivable. Both the Stahlblechronden 10,10 and / or piston plates 17,18 can in your various applications and designs with particular advantage rationally uniform from a

Steel sheet / stainless steel sheet can be obtained cold formed without cutting from coil material in large quantities.

The expression of the different Stahlblechronden 10.10 for differently designed disc brake pad designs is solved as follows. In the first embodiment (Fig. 1-8) bolt-guided disc brake pad 5 without piston retaining spring 19,19) is the steel sheet metal blank 10,10 ^s flat and placed flat on the back plate back 9 and intermediate layer 20.

An indirect fixation of a steel sheet metal blank 10, 10 ^s - including adaptation to the second embodiment (FIGS. 9-13, guided disc brake lining 5 with piston spring 19, 19 ^s ) - together with a sheet-metal plate with a shape of approximately cupped shape is 10.10 ^seconds and is common with a cup-shaped attachment portion of the piston retaining spring 19,19 ^{s possible} as follows. The piston retaining spring 19,19 ^s sits with its cupped in the direction of the back plate 6 everted mounting portion, namely your bottom 25,25 ', on the back 9 of the back plate 6 and is fixed by riveting. The Stahlblechronde 10,10 ^s is indirectly clamped by a screen 26,26 ^s of the piston retaining spring 19.19 ^s on the back plate 6. The Stahlblechronde 10.10 ^s has in the region of the through hole 13.13 ^s for distancing / Abstüt tion at a given distance via an axially directed annular nozzle 23.23 ^s whose length corresponds approximately to the thickness of the intermediate layer 20, while the recess 24,24 ^S axially passes through, and consequently projects axially in the direction of a spacer in the direction of the back plate 6. Incidentally, the steel sheet metal blank 10,10 ^{s is} almost flat and with a central through hole 13,13 ^s as the passage for the ground 25, 25 ^s before, so that the screen 26,26 of the piston retaining spring 19,19 with axially directed and predetermined defined elastic biasing force on the back 11,11 of the steel sheet metal record 10,10 ^s seated and clamped this non-positively on the back plate back. In the intermediate layer 20 are openings / passages 24,24 ^s he ^¬ arranged, which are ^s, at least partially penetrated in each case from the mounting portion of the Kol ^¬ benhaltefeder 19.19 ^s, and from the ring nozzle 23.23 ^s of the sheet steel blank 10,10 axially.

Axial offset V between adjacent Stahlblechronchronden 10,10 ^s is in principle low and allows.

The total thickness of the multi-layer sandwich composite results from a summation of the thickness of your individual layers in the following system arrangement:

Back plate thickness - between about 4.0 mm - 8.0 mm

Pad thickness - between about 0.5 mm - 1.2 mm

Sheet steel plate thickness - between about 0.4 mm - 2.0 mm

_{γ 1γ 1}

Reference sign list

1 vehicle disc brake

2 disc brake caliper

3 brake pistons

4 brake pistons

5 disc brake pad

6 back plate

7 front side

8 friction material

9 back side

10.10 steel sheet metal blank

11 front side

12.12 lateral surface

13 through hole

14 rivet

15 rivet head

16 decoupling agent

17 piston shield

18 piston shield

19,19 piston retaining spring

20 liner

21.21 ^s front side

22 piston axis

23.23 ^s ring neck

24, 24 recess

25.25 ^s soil

26, 26 ^s screen Ax axial direction

D diameter

d diameter

F escape

M central axis s sheet thickness

T tangential direction

R radial direction

V axis offset

Z center

Claims

claims

1. Damping body for a motor vehicle disc brake pad (5), characterized in that the damping body is provided as a symmetrical, flat Stahlblechronde (10, 10), which has a substantially constant sheet thickness s and two mutually largely plane-parallel end faces (11,21), and has an annular circumferential surface (12).

2. Damping body according to claim 1, characterized in that the Stahlblechronde (10,10) has a diameter D with a diameter range between at least about 30 mm and a maximum of about 80 mm.

3. damping body according to claim 1, characterized in that the Stahlblechronde (10,10) in its center Z has a through hole (13).

4. damping body according to one or more of claims 1-3, characterized in that the through hole (13) has a diameter d in a diameter range between at least about 2 mm and a maximum of about 10 mm.

5. Damping body according to one or more of claims 1-4, characterized in that the Stahlblechronde (10,10) on a front side (11,21) has a decoupling means (16).

6. damping body () according to one or more of claims 1-5, characterized in that the decoupling means (16) on several sides of the Stahlblechronde (10,10 ^s ) is provided.

7. damping body according to claim 5 or 6, characterized in that the decoupling means (16) is provided undetachably integrated on the Stahlblechronde (10,10).

8. damping body according to claim 6, characterized in that the decoupling means (16) is provided as a coating or coating on the Stahlblechronde (10,10).

9. damping body according to claim 5 or 6, characterized in that the decoupling means (16) separately, releasably or integrally provided on the Stahlblechronde (10,10) is provided.

10. Damping body according to claim 9, characterized in that the decoupling means (16) as a formless paste, or as an additional body, in particular as a foil or

Intermediate layer, on which steel sheet metal blank (10.10 ^s ) is provided.

11. Damping body according to claim 9, characterized in that the Stahlblechronde (10.10 ^s ) is present as a multi-layer steel sheet composite body.

12. Damping body according to one or more of claims 1-10, characterized in that the Stahlblechronde (10,10) is stamped out of stainless steel sheet material.

13. Motor vehicle disc brake pad (5) with a back plate (6) and with a friction material (8) on a front side (7) of the back plate (6), characterized in that on a back (9) of the back plate (6) a Stahlblechronde (10.10 ^s ) is fixed.

14. Motor vehicle disc brake pad (5) according to claim 13, characterized in that the back plate (6) has a Steel sheet metal blank (10,10) having the features of one or more of claims 1-12 carries.

15. Motor vehicle disc brake pad (5) according to claim 14, characterized in that the Stahlblechronde (10,10) with burr on the front side (21) on the back (9) of the back plate (6) is fixed non-slip fixed.

16. Motor vehicle disc brake pad (5) according to claim 15, characterized in that the Stahlblechronde (10,10) directly, or indirectly via an intermediate layer (20) on the back (9) of the back plate (6) is seated.

17. Motor vehicle disc brake pad (5) according to one or more of claims 13 to 16, characterized in that the

Steel sheet metal ring (10.10 ^s ) in the center of the back plate (6) is arranged.

18. Motor vehicle disc brake pad (5) according to one or more of claims 13 to 16, characterized in that the

Back plate (6) carries a plurality of steel blanks (10.10 ^s ), which are distributed symmetrically on the back (9) of the back plate (6).

19. Motor vehicle disc brake pad (5) according to one or more of claims 13 to 18, characterized in that the

Fixation between the back plate (6) and steel sheet metal blank (10.10 ^s ) of each through hole (13) of a rivet (14) is penetrated.

20. Motor vehicle disc brake pad (5) according to claim 19, characterized in that the rivet (14) fixes the Stahlblechronde (10.10 ^s ) together with a piston retaining spring (19.19 ^s ) on the back (9) of the back plate (6) ,

21. Motor vehicle disc brake pad (5) according to one or more of claims 1-20, characterized in that the piston ^¬ retaining spring (19,19) with its bottom (25, 25) on the back plate (6) is seated, and that the ground ( 25,25) passes through a through hole (13,13 ^s ) of an interposed Stahlblechronde (10,10 ^s ) axially, as well as with an axially recessed shield (26,26 ^s ), the Stahlblechronde (10,10 ^s ) elastic with a defined biasing force on the back (9) of the back plate (6) clamped.

22. Motor vehicle disc brake pad (5) according to one or more of claims 1-21, characterized in that adjacent Stahlblechronden (10,10 ^s ) with axial offset V in the radial direction R offset from each other on the back plate (6) are arranged fixed.

23. Motor vehicle disc brake pad (5) according to one or more of claims 1-22, characterized in that the disc brake lining (5) is provided as a multilayer sandwich body system with graded individual layer thicknesses as follows:

Back plate thickness - between about 4.0 mm - 8.0 mm

Pad thickness - between about 0.5 mm - 1.2 mm

Sheet steel shell thickness s - between about 0.4 mm - 2.0 mm.

24. Motor vehicle disc brake (1) comprising at least two motor vehicle disc brake pads (5), characterized in that at least one of the vehicle disc brake pads (5) via a damping body in the form of a Stahlblechronde

(10.10 ^s ), and is formed according to one or more of claims 1-23.