DE1989310U - BRAKE DISC FOR DISC BRAKES IN MOTOR VEHICLES. - Google Patents

Description

BAYERISCHEMOiORENWERKEAKTIENGESELLSCHAFI

April 29, 1968 Brake disc for disc brakes in motor vehicles

The innovation relates to a cast brake disc for disc brakes of motor vehicles, with through between two Brake disk halves radially extending stiffening ribs delimited ventilation slots.

On the brake discs of motor vehicles, especially in internally ventilated brake discs for fast sports vehicles have high requirements with regard to the accuracy of the static and dynamic balancing. Kick it however, difficulties arise in the case of the cast, internally ventilated brake disks due to the misalignment in shape and core large differences in wall thickness can arise; it is there for spatial or functional reasons not always possible, the unbalance in the usual way by machining to remedy the accumulation of material.

The innovation is based on the task listed above Deficiency in the balancing of internally ventilated brake discs to eliminate and suggests that the stiffening ribs in the area of their outer circumference holding devices have, to which the balance weights can be attached positively and / or non-positively.

According to one embodiment of the innovation, it is proposed that that the balance weights have an essentially U-shaped, corresponding to the shape of the stiffening ribs in their outer area Have cross-section, inwardly directed noses are arranged at the free ends of the webs, which in State of the balance weights attached to the stiffening ribs after plastic deformation of the webs with a hole are in a form-fitting connection in the stiffening ribs.

3MV / -1050 HD

April 29, 1968

Furthermore, the innovation suggests that the balance weights have an essentially U-shaped cross-section and in attached to the stiffening ribs state after plastic deformation of the webs around one in the outer area of the stiffening ribs arranged bead are positively connected to the stiffening ribs,

According to the invention, the balance weights can be used as self-resilient, be formed essentially having a U-shaped cross-section having brackets which are non-positively connected to the stiffening ribs are attachable.

According to a further exemplary embodiment, the are selected weights can be non-positively attached to the stiffening ribs by means of a spring. The balance weights show a Recess according to the outer shape of the stiffening ribs and are by means of a in a groove of the balance weights engaging spring, the free ends of which in turn engage in a hole or the like on the stiffening ribs, attachable to the stiffening ribs.

The balancing method according to the innovation is particularly suitable for automatic balancing, regardless of the size the imbalance, the balancing masses with the one to correct the respective Unbalance required weight can be attached to the stiffening ribs. This allows high accuracy can be achieved with regard to the static and dynamic balancing of the brake discs.

Further details of the innovation can be found in the description of the drawing explained in more detail.

In the drawing, the innovation is shown on the basis of several exemplary embodiments, namely shows

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April 29, 196-8

the pig. 1 shows an internally ventilated brake disc in different views or cuts and the

Pig. 2 to 5 different embodiments of the attachment of the balance weights on the stiffening ribs.

The brake disc for disc brakes shown in Figures 1 to 5 of motor vehicles is manufactured in the casting process and consists essentially of the hub 1 and the two brake disc halves 2 and 3 »which are connected to one another by radially extending stiffening ribs 4 and between which the Ventilation slots 5 for the internal ventilation of the brake disc halves 2 and 3 are arranged. For attaching balance weights 6, 6 ', 6 "and 6"' are in the outer area of the outer circumference of the stiffening ribs 4 holding devices are arranged on which the balance weights are positively and / or non-positively are attachable. To this end, the stiffening ribs point 4 has a smaller outer diameter than the outer diameter of the two brake disc halves 2 and 3, so that the balance weights attached to the stiffening ribs 4 are not over the outer diameter of the two brake disc halves 2 and

3 protrude.

In the exemplary embodiment according to Pig. 2 is on the stiffening rib

4 a balancing weight 6 attached, which has a substantially U-shaped, the Porm of the stiffening rib 4 corresponding Has cross section, wherein at the free ends of the webs 7 inwardly directed lugs 8 are arranged. For fixing of the balancing weight 6 on the stiffening rib 4, the balancing weight 6 is pushed over the stiffening rib 4 and arrives after plastic deformation of the webs 7, wherein the rabbits 8 engage in a bore 9 of the stiffening rib 4, with the

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April 29, 1968

Reinforcing rib 4 in form-fitting connection.

In the embodiment according to Pig. 3, the balancing weight 6 'also has an essentially U-shaped cross section. A bead 1o arranged in the outer region of the stiffening rib 4 serves as a fastening device on the stiffening rib 4. The attachment of the balancing weight 6 takes place in turn by plastic deformation of the webs 7 ^{f of} the balancing weight 6 'around the bead 1o, so that in the attached state the balancing weight 6' is again in a form-fitting connection with the stiffening rib 4.

For the form-fitting connections the balance weights according to Figure 2 and 3 must be the material of the brake disc and From the balance weight with regard to the modulus of elasticity, thermal expansion and strength must be matched to the loosening of the balance weights under the action of centrifugal force and Avoid thermal expansion with certainty.

In FIG. 4, the balance weight is "designed as selbstfedernde, a substantially U-shaped cross-section having clamp which befestjg frictionally on the stiffening rib 4 is> ar. An UEN free ends of the webs 7" 6 are arranged inwardly directed rabbits 8 " The inherently resilient balance weight is pushed over the stiffening ribs 4 for fastening and engages with the lugs 8 ″ in a bore 9 in a resilient manner. The shape of the lugs 8 ″ or the shape of the bore 9 is to be selected in such a way that the balancing weight 6 ″ does not become detached from the stiffening rib 4 under the action of centrifugal force.

In the embodiment of the firing shown in FIG the balance weight 6 '' 'by means of a spring 11 .frictionally attached to the stiffening rib 4. For this purpose, the balancing weight 6 '' 'has a recess 12, accordingly the outer shape of the stiffening rib 4, on and

April 29, 1968

is by the spring 11, which is in a groove of the balance weight 6 '' 'is attached to the stiffening rib 4 via a bore 9. The two cross each other free ends of the spring within the bore 9 and thus keep the balance weight 6 '' 'in a force-locking connection with the stiffening rib 4

Protection claims;

8MViZ-IOSOHD

Claims (7)

.Ä.253562-3.5.68 April 29th T9 & 8. Protection claims: ίί 1. Cast brake disc for disc brakes of motor vehicles, limited by stiffening ribs running radially between two brake disc halves »ventilation slots; characterized in that the stiffening ribs (4) have holding devices in the area of their outer circumference on which balancing weights (6, 6 ', 6 " or 6 "') can be fastened positively and / or non-positively. 2. Brake disc according to claim 1, characterized in that the balancing weights (6) have a substantially U-shaped, the shape of the stiffening ribs (4) have in their outer area corresponding cross-section, with the free ends of the webs (7) inwardly directed lugs (8) are arranged, which are attached to the stiffening ribs (4) State of the balance weights (6) after plastic deformation of the webs (7) with a hole (9) in the stiffening ribs (4) are in mold sole-liquid connection. 3. Brake disc according to claim 1, characterized in that the Erwuohtgewichte (6) have a substantially U-shaped cross-section and in the state attached to the stiffening ribs (4) after plastic deformation of the webs (7 ^f ) around one in the outer region of the stiffening ribs (4) arranged bead (1o) with the stiffening ribs (4) are positively connected. 4. Brake disc according to claim 1, characterized in that the balancing weights 6 ^{M are designed} as self-resilient, essentially U-shaped cross-section having brackets which can be non-positively fastened to the stiffening ribs (4). 5. Brake disc according to claims 1 and 4, characterized - 7 - -3! -1W-IOSOHD *> .7- ■■; ■ j April 29, 1968 shows that at the free ends of the webs (7 ") after inwardly directed rabbits (8 ") 'are arranged, which in the state of the balancing weights attached to the stiffening ribs (4) (6 ") are non-positively connected to a hole (9) in the stiffening ribs. 6. Brake disc according to claim 1, characterized in that the balancing weights (6 ¹¹¹ ) can be non-positively fastened to the stiffening ribs (4) by means of a spring (11) or the like. 7. Brake disc according to claims 1 and 6, characterized in that the balancing weights (6 " ^f ) have a recess (12) corresponding to the outer shape of the stiffening ribs (4). And by means of a spring ( 11). engage the free ends in a bore (9) or the like to the stiffening ribs (4), ribs on AEEN stiffener can be fastened. HD