WO2000047910A1

WO2000047910A1 - Brake lining carrier plate

Info

Publication number: WO2000047910A1
Application number: PCT/EP2000/001029
Authority: WO
Inventors: Hans-Herbert Noack
Original assignee: EaglePicher Wolverine GmbH
Current assignee: Wolverine Advanced Materials GmbH
Priority date: 1999-02-10
Filing date: 2000-02-09
Publication date: 2000-08-17
Anticipated expiration: 2001-08-10
Also published as: DE19905529C1; AU2442100A

Abstract

With a brake lining carrier plate (1) with a base plate (1a) on one side of which the brake lining can be applied and on the other side of which a damping device is mounted, having a pressure induction face (6) for application of a brake part that applies pressure, the base plate (1a) has an elevated peripheral edge (2) on the side facing the damping device and has internal elevations (5) beneath the pressure induction face (6) which are lower than the peripheral edge (2); furthermore, the space within the peripheral edge (2) is filled with a highly viscous adhesive (3), and to form the pressure induction face (6) a cover plate (4) rests on the internal elevations (5) and is glued to the base plate (1a) by means of the adhesive (3).

Description

BRAKE LINING CARRIER PLATE

This invention concerns a brake lining carrier plate with a base plate on one side of which the brake lining can be mounted and on the other side of which is mounted a damping device having a pressure induction face for application of a pressure-applying part of a brake.

Brake lining carrier plates are used to hold the brake lining and to relay the braking force applied by the brake piston or the nipper into the brake lining. The damping device prevents the transmission of vibration from the brake lining or the carrier plate to the brake piston.

With such known brake lining carrier plates, the damping device is a plate coated with rubber on both sides and attached to the base plate with bulges or projections that engage in recesses in the base plate, and it is secured with respect to the latter to prevent twisting and displacement. It is relatively expensive to use coated plates and to produce the projections. In addition, the damping properties are not always satisfactory.

Therefore, the object of the present invention is to simplify the fabrication of a generic brake lining carrier plate while at the same time improving on their damping properties .

According to this invention, this object is achieved with a brake lining carrier plate of the type defined in the preamble due to the fact that the base plate has a peripheral elevated edge at the circumference on the side facing the damping device, and beneath the pressure induction face it has internal elevations which are lower than the peripheral edge; the space inside the peripheral edge is filled with a highly viscous adhesive, and a cover plate is provided, resting on the internal elevations and bonded to the base plate with the adhesive.

With a brake lining carrier plate according to the present invention, the sound-absorbing effect is achieved primarily by means of adhesive provided inside the peripheral edge of the base plate. The peripheral edge increases the rigidity of the base plate and thus also has a damping or stabilizing effect on the vibration properties. Due to the increased rigidity of the base plate, its total thickness can also be reduced. The adhesive is covered by a cover plate resting only on the internal elevations of the base plate, arranged beneath the contact face of the brake piston to minimize the spring deflection due to the applied braking force as much as possible. The cover plate is thus mounted in the viscous adhesive and is therefore largely insulated from the base plate. The thickness of the cover plate can be selected according to the mass requirements to optimize the damping effect. Due to the mounting of the cover plate in the adhesive, a highly effective insulation of the part provided for contact with the brake piston from vibration is achieved easily, and at the same time its secure mounting is guaranteed. Furthermore, it is possible to define in advance certain specific combinations of adhesives and cover plate materials and thicknesses for certain sound frequencies and to use them. No additional insulation of the cover plate, e.g. by a coating, is necessary, so the cover plate may be designed as an uncoated metal plate, which thus further reduces the manufacturing costs .

In a preferred embodiment of this invention, the outside dimensions of the cover plate are smaller than the inside dimensions of the peripheral edge of the base plate. In this case, the cover plate has a floating mount and it comes in contact with the base plate only at the internal elevations, thus yielding almost complete separation of the cover plate and the base plate. However, it is also conceivable for recesses to be provided in the peripheral edge, so that sections in the cover plate extend through these recesses, engaging the base plate in the form of a clip. This prevents clacking noises which might occur if the cover plate strikes against the peripheral edge.

Intermediate spaces between the cover plate and the peripheral edge of the base plate are filled to advantage with adhesive. This measure also guarantees insulation of the cover edge at its peripheral edge while at the same time increasing the strength of the bond between the cover plate and the base plate.

In an advantageous refinement of this invention, the thickness of the cover plate is greater than the difference in height between the peripheral edge and the internal elevations of the base plate. This achieves the result that in any case the cover plate projects above the peripheral edge in its thickness direction, which guarantees that the brake piston and the nippers of brakes are in contact only with the cover plate and do not come in contact with the base plate.

If the internal elevations are separate individual elevations, this has a positive effect on damping, because the amount of adhesive that can be applied is especially great, and the size of the contact face between the cover plate and the base plate is minimized as much as possible.

It is especially preferable for the individual elevations to be arranged on opposite arcs of a circle, each extending between two opposing peripheral edge sections. The arrangement of the individual elevations is adapted to the course of a circular pressure contact face of a brake piston, such as those often provided. As an alternative, in an embodiment of this invention that is also preferred, the internal elevations may be designed as two continuous opposing arcs of circles, each extending between two opposing peripheral edge sections . This forms defined chambers within the peripheral edge to accommodate adhesive .

In another advantageous embodiment of this invention, the internal elevations of the one arc of the circle are higher than those of the other arc. This yields a so-called earlier one-sided application of force.

The adhesive is advantageously a two-component mixture which starts from a processing state with a low viscosity and reacts to form a highly viscous mass in the finished state. Cost savings in mass production can be achieved with a higher quality standard at the same time by using liquid adhesives which can be added and processed easily, especially in combination with uncoated metal plates as the cover plates. The cover plate is then placed in the low viscosity adhesive during processing, with the quantity of adhesive being such that the adhesive rises in the interspaces between the peripheral edge of the base plate and the cover plate when the cover plate is placed on the internal elevations, and thus the adhesive surrounds the edge thereof.

If different adhesives are introduced into the partial spaces formed on both sides of the internal elevations or into chambers within the peripheral edge, this permits damping of different frequencies .

This invention is explained in greater detail below on the basis of drawings as examples, showing:

Figure 1 a top view of a brake lining carrier plate according to this invention, provided for application of a brake piston;

Figure 2 a top view like that in Figure 1 of an alternative embodiment of a brake lining carrier plate according to this invention;

Figure 3 a top view of a brake lining carrier plate according to this invention, intended for application of the nippers of a brake;

Figure 4 a cross-sectional view of the embodiment from Figure 2 along line IV-IV, and

Figure 5 a view of the detail shown as "X" in Figure 4 on an enlarged scale.

The embodiments of brake lining carrier plates 1 according to this invention as illustrated in the figures have a base plate with a peripheral outer edge 2. The space enclosed by peripheral edge 2 is filled with adhesive 3 which is covered by a cover plate 4 resting on internal elevations 5.

Internal elevations 5 are arranged in the pressure induction face 6 of the brake lining carrier plate 1, i.e., in the area where a brake piston or the nippers of a brake are applied to the cover plate . Due to the internal elevations 5, the spring deflection under the influence of the braking pressure force is reduced and thus the compressibility of the brake pedal pressure is increased.

The peripheral edge 2 is higher than the internal elevations 5; for example, the height of the peripheral edge may be 0.5 to 0.6 mm and the height of the internal elevations may be 0.3 to 0.4 mm. However, the difference in height between the peripheral edge 2 and the internal elevations 5 is smaller than the thickness of the cover plate 4 whose thickness is selected according to the mass requirements of damping and amounts to 0.3 mm in the selected numerical example. Therefore, the cover plate 4 projects beyond the peripheral edge 2 in the thickness direction (Figure 4) . The outside dimensions of the cover plate 4 are smaller than the inside dimensions of the peripheral edge 2, so that although the cover plate 4 extends to the proximity of the peripheral edge 2, it does not come in contact with it. The cover plate 4 is thus in a floating mount, with the peripheral edge preventing the cover plate 4 from being displaced significantly during the braking operation. In the example presented here, the cover plate 4 is designed as a simple uncoated metal plate.

In the embodiment illustrated in Figure 1, the internal elevations 5 are formed by individual elevations 7. In the example illustrated here, there are six individual elevations 7, three of which are arranged on opposing arcs of a circle, extending between two opposing sections of the peripheral edge. This embodiment of a brake lining carrier plate 1 according to this invention is suitable for application of a brake piston having a circular pressure face 8.

The greatest quantity of adhesive 3 can be introduced in this embodiment. A very great damping is achieved in this way and due to the interruptions in the contact face of the cover plate 4 on the base plate.

However, the opposing internal elevations 5 may also be designed to be continuous 9, as shown in Figure 2. Therefore, chambers 10 which are almost completely separate from one another are formed within the peripheral edge 2. Different types of adhesive can be introduced into these chambers to achieve damping of different sound frequencies with one and the same brake lining carrier plate 1. Mixing of these different types of adhesive is largely prevented due to the continuous internal elevations 5.

It is also possible to fill the chambers with different types of adhesive in the embodiment according to Figure 1, but in that case a greater mixing effect must be expected. However, complete mixing will not occur here either.

Figure 3 shows an example of a brake lining carrier plate 1 provided for the nipper side of a brake. In the example shown here, nipper 6 has two triangular sections 11 with three individual elevations 12 being provided for each. The individual elevations 12 are arranged according to the shaping of nipper sections 11, i.e., approximately in a triangular shape in the present example.

The internal elevations 7, 9, 12 which are opposite one another have different heights in Figures 1 through 3, to yield early application of the brake lining. For example, the height of the internal elevations may be 0.3 to 0.4 mm on one side and the height of the opposite internal elevations may be 0.4 to 0.5 mm.

The intermediate spaces between cover plate 4 and base plate la are filled completely with adhesive 3. In particular, the space 13 between the cover plate 4 and the peripheral edge 2 is filled with adhesive, so that the cover plate 4 is completely insulated from the base plate la by means of the adhesive 3 except for the contact surfaces on the internal elevations 9.

In manufacture, the cover plate 4 is pressed into the adhesive 3. The adhesive 3 rises on the outside of the cover plate 4, filling the gap 13 between the peripheral edge 2 of the base plate la and the edge of the cover plate

Figure 4 also shows the mounting of a piston return spring (not shown) . The piston return spring is attached by rivets in the cover plate 4 without rivet 14 coming in contact with the base plate la. Thus, the piston return spring is also uncoupled from the excited vibrating body. In the example shown here, a small recess is provided in the base plate la, with the rivet 14 projecting into this recess without coming in contact with the base plate la.

The adhesive 3 is a two-component mixture which has a low viscosity in the processing state and reacts rapidly to form a very viscous mass. Use of such liquid adhesives greatly facilitates processing, because they can be dosed easily, and the cover plate 4 need only be placed in the adhesive 3 or pressed into it to produce the brake lining carrier plate 1.

Claims

1. A brake lining carrier plate with a base plate on one side of which the brake lining can be applied and on the other side of which a damping device is mounted, having a pressure induction face for application of a brake part that applies pressure, characterized in that the base plate (la) has an elevated peripheral edge (2) on the side facing the damping device and has internal elevations (5) beneath the pressure induction face (6) which are lower than the peripheral edge (2); the space within the peripheral edge (2) is filled with a highly viscous adhesive (3); and to form the pressure induction face (6) there is a cover plate (4) which rests on the internal elevations (5) and is glued to the base plate (la) by the adhesive (3).

2. A brake lining carrier plate according to claim 1, characterized in that the outside dimensions of the cover plate (4) are smaller than the inside dimensions of the peripheral edge (2) of the base plate (la) .

3. A brake lining carrier plate according to claim 1, characterized in that recesses are formed in the peripheral edge (2), with sections of the cover plate

(4) extending through the recesses with each engaging the base plate (la) in the form of a clip.

4. A brake lining carrier plate according to one of claims 1 through 3, characterized in that interspaces (13) between the cover plate (4) and the peripheral edge (2) of the base plate (la) are filled with adhesive (3) .

5. A brake lining carrier plate according to one of claims 1 through 4, characterized in that the thickness of the cover plate (4) is greater than the difference in height between the peripheral edge (2) and the internal elevation (5) of the base plate.

6. A brake lining carrier plate according to one of claims 1 through 5, characterized in that the internal elevations (5) are separate individual elevations (7, 12) .

7. A brake lining carrier plate according to claim 6, characterized in that the individual elevations (7) are arranged on opposite arcs of a circle, each extending between two opposite peripheral edge sections .

8. A brake lining carrier plate according to one of claims 1 through 5, characterized in that the internal elevations (5) are designed as two continuous opposite arcs of circles, each extending between two opposite peripheral edge sections.

9. A brake lining carrier plate according to claim 7 or 8, characterized in that the internal elevations (5) of the one arc are higher than those of the other arc.

10. A brake lining carrier plate according to one of claims 1 through 9, characterized in that the adhesive (3) is a two-component mixture that reacts from a low- viscosity processing state to form a highly viscous mass in the finished state.

11. A brake lining carrier plate according to one of claims 1 through 10, characterized in that different adhesives (3) are introduced into the partial spaces formed on both sides of the internal elevations (5) within the peripheral edge (2) .