DE102007020572A1 - Brake lining for disk brake of e.g. commercial vehicle, has friction lining fastened to carrying plate that exhibits two partial plates, where one partial plate bears friction lining and another partial plate forms tail of friction lining - Google Patents

Abstract

The lining has a lining carrying plate (1),and a friction lining (2) fastened into the carrying plate. The plate has two partial plates (4, 5), where the plate (5) bears the friction lining and the plate (4) forms a tail of the friction lining. The partial plates exhibit different physical characteristics. The partial plate (4) consists of cast-iron materials and the partial plate (5) consists of a steel plate. One of the partial plates is provided with cooling fins or groove shaped recesses, where the partial plates are connected with each other in a form-fit and material-fit manner.

Description

The The invention relates to a disc brake according to the preamble of Claim 1.

disc brakes for vehicles, especially for Commercial vehicles, in addition to a brake disc and two brake pads, the if necessary, so when braking, against the friction surfaces of a Brake disc are pressed.

Everyone Brake lining consists of a lining carrier plate and one on it attached friction lining, rubbing in the use position of the assigned friction surface the brake disc is applied.

Usually becomes the lining carrier plate the brake lining made of a cast iron material, preferably nodular cast iron (GGG) or made of steel. Ductile iron offers advantages with regard to this the shaping, as necessary for example for pressing the brake pad Equal pieces to the lining carrier plate can be molded with.

adversely in the known lining carrier plates is a relatively high heat transfer in the brake, for example, to a corresponding load the arranged in the caliper of the disc brake functional parts leads.

Besides It can in the known brake pads for the development of squeaking and Vibrations come, which are perceived as very disturbing.

apart that in a production of the lining carrier plate made of steel, the plungers not one piece are formed, since such a construction a considerable would mean production engineering effort, is a stiffening of the lining carrier plate, to their delay due to the resulting during braking effective Frictional heat too prevent, required, what only with a corresponding manufacturing effort is feasible.

Of the Invention is based on the object, a brake pad of the generic type so that he develops with constructive and manufacturing technology low effort becomes more reliable.

These Task is a brake pad with the features of the claim 1 solved.

By the multi-part design of the lining carrier plate become a whole Achieved a number of advantages.

Especially It should be emphasized that the heat transfer without great effort be reduced to a noteworthy extent in the disc brake can. It can the sub-panels on their facing and abutting surfaces, for example with trough-shaped Wells be provided, forming the cooling channels, where expediently each sub-plate has cooling channels, which deals with cooling channels of cover adjacent sub-plate, so that arise cooling holes through an insulation on the one hand and a heat dissipation on the other hand is possible.

To An advantageous embodiment of the invention is the friction lining remote part plate made of a cast iron, preferably a ductile iron, while the friction plate, on which the friction lining is attached, also made Cast iron, such as a gray cast iron, or made of steel.

Especially Advantageously, such a brake lining is then when the Partial plates differ in their physical properties are what is given by the said choice of material.

Should the partial plates, but at least two of the partial plates, from different Cast iron types exist, so it makes sense, the two partial plates in production by a "sizing" to separate are known as "simple" coating materials, the on Shapes and cores are applied to smooth a porous surface.

As mentioned, can the facing surfaces the sub-plates provided with cooling holes be. It is also conceivable to design the contact surfaces smooth overall and full surface to put on each other. The partial plates can differ from each other be fixed. For example, an outer edge fixation is conceivable, d. H. a partial plate overlaps the adjacent in the outer edge area, so that at least one fixation in the loading direction, ie in Direction of rotation of the brake disc is given. These are preferably the outer edges of the the friction lining bearing friction plate shaped like a claw, so that the associated second sub-plate, for example, on the back can be postponed, whereby by limiting the claw-like margins practically a shaft is formed, for receiving the second partial plate, the rest the integrated pressure pieces can carry.

To Another aspect of the invention, the facing each other Partial plates on each other corresponding positive locking means, For example, in the form of webs and grooves, both an axial, how to form radial or tangential fixation. This type of fixing can be referred to as internal fixation.

Further advantageous embodiments of the invention are characterized in the subclaims.

embodiments The invention will be described below with reference to the accompanying drawings.

It demonstrate:

1 a brake pad according to the invention in a schematic plan view

2 a further embodiment of a brake pad according to the invention, also in a schematic plan view.

In the figures, in each case a brake pad for a disc brake, in particular a utility vehicle, shown, which consists of a lining carrier plate 1 and a friction lining attached thereto 2 consists.

When braking, the brake pad 1 with his friction lining 2 pressed against a brake disc, not shown.

According to the invention, the lining carrier plate 1 from two partial plates 4 . 5 , which face each other, parallel to the friction surface of the friction lining 2 extending surfaces lie against each other, however, shown in the illustrations with a small distance from each other.

Preferably, the first part plate 4 that the friction lining 2 turned away and forms a back of the brake lining, made of a ductile iron, with pressure pieces 3 are poured. These plungers 3 Contact associated adjusting spindles of the disc brake, which are in operative connection with a clamping device. The latter components are not shown in the figures.

The friction lining 2 carrying second part plate 5 can be formed as a sheet metal part or also produced as a casting, wherein the physical properties of the first and the second part plate 4 . 5 preferably are different.

In the in the 1 Example shown has the second part plate 5 claws at the edge 6 on, which is in the friction lining 2 extending away direction and the edge of the first sub-plate 4 overlap, so that, relative to the central axis M, an axial, tangential and optionally radial fixation of the first sub-plate 4 on the second part plate 5 given is.

The claws 6 may be formed so that the first part plate 4 in function in the radial direction, based on the axis of the brake disc, supported, wherein in the illustrations, the top of the brake pad is shown.

Next are on the facing surfaces of the first and second sub-plate 4 . 5 each groove-shaped recesses provided, which are congruent and, as particularly clear in the 1 it can be seen together cooling holes 7 form, is dissipated by the frictional heat generated during braking.

Instead of the cooling holes cooling fins may be formed, which are preferably half-round in cross-section and which are each on the flat opposite side of the opposite partial plate 4 . 5 support, which also results in a ventilation scheme.

In the 2 are another example of a fixation of the partial plates 4 . 5 shown positive engagement with each other, the off in the second sub-plate 5 introduced grooves 8th and to the first part plate 4 molded webs 9 consist. These run transversely to the longitudinal extent of the brake pad, as well as the cooling holes 7 according to the 1 ,

In cross-section are the grooves 8th and the adapted webs 9 rhombenartig formed, wherein, based on the central axis M, two positive locking connections are provided on the right and left, which are formed obliquely oppositely directed.

Of course, other positive locking means or fixing means are conceivable. It is essential that a secure bond between the sub-panels 4 . 5 is ensured even in case of load.

1

Backing plate

2

friction lining

3

Pressure piece

4

first subpanel

5

second subpanel

6

claw

7

cooling hole

8th

groove

9

web

M

central axis

Claims (12)

Brake lining for a disc brake, with a lining carrier plate ( 1 ) and an attached friction lining ( 2 ), characterized in that the lining carrier plate ( 1 ) of at least two partial plates ( 4 . 5 ), one of which ( 5 ) the friction lining ( 2 ) and another ( 4 ) Opposite forms a back of the brake pad. Brake lining according to claim 1, characterized in that the partial plates ( 4 . 5 ) difference have physical properties. Brake lining according to claim 1 or 2, characterized in that the partial plates ( 4 . 5 ) consist of different cast iron materials. Brake lining according to one of the preceding claims, characterized in that at least one of the partial plates ( 4 ) of a cast iron material and an adjoining sub-plate ( 5 ) consist of sheet steel. Brake lining according to one of the preceding claims, characterized in that two partial plates ( 4 . 5 ) lie all over or partially together. Brake lining according to one of the preceding claims, characterized in that at least one of the adjoining partial plates ( 4 . 5 ) is provided with cooling ribs or channel-shaped recesses. Brake lining according to one of the preceding claims, characterized in that two of the adjoining partial plates ( 4 . 5 ) each have channel-shaped recesses which are congruent and together each have a cooling bore ( 7 ) form. Brake lining according to one of the preceding claims, characterized in that partial plates ( 4 . 5 ) are positively or materially connected to each other. Brake lining according to one of the preceding claims, characterized in that one of the partial plates ( 4 . 5 ), preferably the friction lining ( 2 ) carrying partial plate ( 5 ) in its edge region partly as a claw ( 6 ) is formed, which the edge region of the other partial plate ( 4 ) overlaps. Brake lining according to one of the preceding claims, characterized in that for the positive connection of the partial plates ( 4 . 5 ) in a partial plate ( 5 ) Grooves ( 8th ) are provided in the webs ( 9 ) of the other sub-plate ( 4 ) intervene. Brake lining according to one of the preceding claims, characterized in that the arrangement of the form-locking connection grooves ( 8th ) / Stages ( 9 ) is mirror symmetric. Brake lining according to one of the preceding claims, characterized in that the grooves ( 8th ) and the embedded webs ( 9 ) in cross section obliquely to the plane of symmetry.