DE2039003A1 - Disc construction in a friction clutch or brake - Google Patents

Description

DR. ING. F. WtTESTHOFF 8 MUNICH BO ^w

DIPL. ING. G. PTTIiS · SCHWEIOEHSTHASSE 8

DR.E.T.PKCHMANN tuikw 22 06 31

-DR. ING. D. BEHRENS nuoumuBnssi:

PATENTANWÄLTE "MOMOTFATeWT μΟνοπβκ

1A-38 373

Description of the patent application

Girling Limited *

Tyseley, Birmingham, England

, concerning

Disc construction for a friction clutch or

- brake

The invention relates to a disc structure in the case of a friction clutch or brake with a hub to be attached to a shaft and a hub located radially on the outside Ring disc assembly with friction pads or the like can cooperate, and is arranged non-rotatable, but axially displaceable on the hub.

The washer assembly of such a construction is usually axially on both sides of friction pads or ■ like applied.

The main field of application of the invention is on the Disc brake field. The following description is therefore geared towards disc brakes.

Disc brakes are known in which the disc can slide axially. Such a disc brake system with a floating disc arrangement is particularly useful in the case of multi-disc brakes some advantages.

- ■. · "■■■ - 2 -

109808/1882

The disc must rotate together with a shaft and transfer the braking torque to it. Therefore must if they are to be able to swim axially at the same time, they are connected to the shaft or to a hub carried by the shaft be that they. JJ "a torque on the shaft or Transfer hub and at the same time, however, this can move axially sliding relative to. For example, a such a connection can be a spline connection. During normal operation in which the brakes are not applied, An undesirable noise known as "rattling" can occur between the disc and the shaft or hub.

The invention is based on the object of a disc structure To create of the type mentioned, in which a "rattle" noise when the brake is not actuated is avoided.

To solve this problem, one or more radially acting ones are located between the hub and the annular disk arrangement Springs arranged. The springs tension the washer assembly radially against the hub and thus reduce it free rotation of the disk assembly minimizes noise between the disk assembly and the hub.

The springs can be made so stiff that they remove any noise between the disc assembly and the Suppress the hub. The use of a wedge connection is by no means excluded, and this is also the case with most of them preferred embodiments realized. In this case, too, the springs are designed so that only a very slight or there is no rattling at all between the hub and the disk arrangement when they are free to run.

109808/1 882

The invention and advantageous details of the invention are explained in more detail below with reference to schematic drawings of several exemplary embodiments. It demonstrate:

-Fig. 1 shows an axial section through a brake disc construction according to the invention, further parts of a disc brake cooperating with the disc structure in dashed lines are shown;

Figure 2 is a partial top plan view of the disc structure of Figure 1;

Fig. 3 is a partial plan view of another embodiment and

Fig. 4 is a partial plan view of a further embodiment the disc construction according to the invention.

The brake disk construction of a road vehicle shown in FIGS. 1 and 2 has a hub 1 and an annular disk arrangement 2. In its center, the hub 1 has an opening 3 for a shaft (not shown) in an annular web 4. The web 4 is provided with holes for a screw connection with a flange in the heads. The disk arrangement 2 has two annular disks 7 which are arranged at a distance from one another and can be axially displaced independently of one another. The ring disks 7 each act with
32 and 35 together.

7 each work with a f ^äX brake pad 31 and 35 or

The ring disks 7 are non-rotatable, but axially displaceable on the hub 1 by means of pins 18 and 28, which with sliding fit in partially in the disc arrangement and

_ 4 -109808 / 1882

partially located in the hub holes 9 (Fig. 2) added are. At least a portion 18 of the pins are in the form of grooved pins as hollow cylinders slotted longitudinally Formed spring steel and thus resilient. These resilient pins 18 are shown in Fig. 2 as double circles, to distinguish them from the rigid solid pins 28 with which they are alternately distributed over the circumference. the The springiness of the pins 18 is selected so that, during normal operation, the disk arrangement is concentric with the hub and

·. at the same angle ··, but when braking

yielding of the disc arrangement for transmitting the braking force via the rigid pins 28 ./d he axial movement of the pins 18 and 28 are side plates 11 fastened with bolts on both sides of the hub. The rigid pins 28 are only required for applications where very high loads can occur. If this is not the case, all pins can yield in the shape of the longitudinally slotted hollow pins 18 are formed.

In the embodiment according to FIG. 3, leaf springs 14 are used instead of such resilient pins. These leaf springs have rolled-up ends 20 which are received in arched recesses 21 of the disk arrangement 2 ¹ and which rest with their central region on flattened areas 15 on the circumference of the hub 1 '. The leaf springs 14 thus urge the disk arrangement into a concentric position in relation to the hub that is consistently aligned in the circumferential direction. Another modification of the embodiment of Fig. J5 is that a plurality of rigid, rectangular projections 16 instead of the rigid Zylihderstifte on the circumference of the. Hub Ί 'is arranged. These rigid projections serve as wedges with substantial radially oriented transfer surfaces which allow thermal expansion and slide in corresponding slots 17 of the disk assembly «2. These slots are deeper than

10 9 8 0 8/1882

ORIGINAL INSPECTEQ

2Q39QQ3

the height of the gate projections. The protrusions center the disk assembly with little play, which is arranged by the two projections 16, seen in the circumferential direction

Springs 14 is added.
** each, between

In the case of the construction according to FIG. 3, very similar Embodiment. , According to Fig., 4 are 'the leaf springs 14' by means of rigid cylinder pins 38 held in their position and preloaded, whereof the cylinder pins 38 in turn between a Recess 19 arched in the shape of a circular arc in cross section

Bulge and an oppositely curved /. -In the leaf spring are held. Of these pins 38 are partially the. Circumferential forces and the braking forces on the leaf springs were added. The recesses in the hub are designed in the form of flats along a chord. Even with the exemplary embodiments 3 and 4 side plates are arranged around the springs and over them the disc assembly to hold axially with respect to the hub.

The illustrated embodiments with two (or. more) axially movable discs can be used with fully or partially lined disc brakes. The discs' of friction material and the parts interacting with it made of a wear-resistant material.

When, on the one Ausführungsförm a spot-type disc brake mrist on the one S-'c-heibenkonstruktion according to the invention according F $ g <"1 sdiiadi normally-12 provided friction pad;, - by serving as-a edlne 3 ^t 1 ¹ stationary and ^d: The other 32 can be pressed hydraulically against the outside of an annular disk 7 by means of a piston 33 operating on a cylinder 3k. Fe-rne-r is e-ÜBi another B-remskdsssnpaar 35 'provided, "the'je-dfcxeh; parallel to the axis of rotation of the disc

, Z by means of flexible pins. 36 or the like. Between

** bewe'gfeaiF "*

- fe -

_0RieiNAL , NSPECTB)

each pair of ring disks 7 of a disk assembly is arranged. When the brake is actuated, the ring disks are on the friction pads 31 and 32 against the normally associated friction pads 35 pressed, so that on all end faces of the annular disks 7 a Braking effect arises when releasing the brake, their different To separate parts from each other, return springs, not shown, are provided.

While in the preferred embodiments the disk assembly and the hub are concentric by means of the springs are held relative to one another, the disk assembly can also be biased against the hub so that it engages the hub. is held touching at one point.

Of course, different types of springs can also be provided, provided that they only cope with the mechanical stresses and are able to cope with the temperature stresses in operation. While in the preferred embodiments, the washers slide over the springs, can each ring washer also have its own spring which slides on the hub to allow axial movement.

5765 claims

_{hal! NSPECTE0}

Claims (1)

A η s check
1. / Disc construction for a friction clutch or -tSremse with a hub to be attached to a shaft and a radially outer annular disk arrangement which can interact with friction pads or the like and is arranged on the hub so as to be non-rotatable but axially displaceable, characterized in that between the hub (1; 1 ') and the annular disk arrangement (2; 2 ^f j 2 ¹¹ ) one or more essentially radially acting springs (18; 14; 14 ') are arranged. 2. Disc construction according to claim 1, characterized in that g e - k e η η ζ e i c h η e t, that as a spring a longitudinally slotted, hollow cylindrical pin (18) is provided in a partly in the ring disk arrangement (2) and partly in the hub (1) located bore (9) is added. 3. Disc construction according to claim 2, characterized in that over the circumference of the ^r hub (1) alternately full cylinder pins (28) and longitudinally slotted hollow cylinder pins (18) are arranged, all pins in ^ eilweis-e ^ in the disc arrangement (2 ) and partially located in the hub (1) bores (9) are added. 4. disc construction according to claim 1, characterized in that the disc arrangement (2jj.2 ") and the hub Cl ¹ ',) _.-. non-rotatable against each other by means of least one projection (16) of the hub or disk assembly are held, which engages in a corresponding slot (17) of the S _c heibenanordnung or the hub. 109808/1882 • 5. Disc construction according to claim 4, characterized in that a leaf spring (14; I4 ^f ) is provided as the spring, which is received in mutually facing recesses (15, 21) in the hub (τ) and in the disc arrangement (2 ¹ ; 2 ¹¹ ) is. 6. Disc construction according to claim 5, characterized in that the recesses (21) have a have a curved cross-section. 7. disc construction according to claim 5, characterized in that a pin (38) between one or each spring (14 ^! ) And the hub, (I ¹ ) .. or the disc arrangement (2 ") is arranged to preload the spring, the pin in a curved recess (19) the disk assembly or the hub and in a separate Booking out
opposite law arched / [is included in the spring. 8. disc construction according to one of claims 1 to 7, characterized in that side plates (11) are attached to both sides of the hub (1J 1 ^! ) To hold the springs (18; 14; 14 ') on the hub axially. 9. disc construction according to one of claims 1 to 8, characterized in that the disc arrangement (2; 2 '; 2 ¹¹ ) comprises a plurality of relatively axially displaceable annular discs (7). 5765. 109808/1882 L e r s e i t e '■ ... of!