DE2660119C2 - Combined actuator for a disc brake - Google Patents

Description

a) a service brake chamber and an auxiliary brake chamber are provided, the latter from the auxiliary brake piston and from an auxiliary brake cylinder is limited;

b) the adjusting device is designed as a spreading device,

characterized by the following features:

c) to operate the spreading device, an

> ■: additional piston (9,39,92) or cylinder (102) is provided, which is spring-loaded in the tracking direction of the spreading device (5,6,35,37, 82b, 83,90,100) and in the opposite direction when pressure is applied to the target -Level clearance is traceable;

Η) to produce the parking brake effect, the expansion device (5, 6, 35, 37, 82b, 83, 90, 100) can be locked by the additional piston (9, 39, 92) or cylinder (102) when the pressure is released.

2. Combined actuating device according to claim 1, characterized by the following features:

a) the spreading device (5,6) is formed by the auxiliary brake piston (5) which is in engagement with complementary inclined surfaces (6a, 6b) of an adjusting filler piece (6,100) via inclined surfaces (5a) arranged in the circumferential direction and parallel to the axis;

b) the additional piston (9) or cylinder (102) is connected to the adjustment filler (6, 100) and moves it in the circumferential direction.

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3. Combined actuating device according to claim 2, characterized in that the Nachstellfüllstück (6) consists of several parts (6b) which are arranged in the circumferential direction at a distance from one another on a carrier (6d) which is connected to the piston (9), prestressed are.

4. Combined actuating device according to claims 1 and 2, characterized in that a ratchet device (104) on the rotatable cylinder (102) connected to the adjustment filler engages and the pawl arranged on the cylinder (102) with a non-rotatably arranged toothed Rastelemcnt cooperates.

5. Combined actuating device according to claim!, Characterized by the following features:

beats;

c) the additional piston (39) acts on the cam (37) in its via auxiliary members (40-43) Direction of rotation.

6. Combined actuating device according to claim 5, characterized in that the active surface is an inclined surface (36) or consists of two surfaces (36a) extending at an angle to one another

7. Combined actuator according to claims 5-6, characterized in that the Cam effective surface has the shape of a logarithmic spiral

8. Combined actuating device according to claim 7, characterized in that the spiral-shaped active cam surface rests against the two inclined active surfaces (36a) of the auxiliary brake piston (35,36) in such a way that the operative resultant is always in the plane of symmetry.

9. Combined actuating device according to one of the preceding claims, characterized in that a locking device (10) which determines the set air clearance engages a piston rod (9a) of the additional piston (9) arranged in a working cylinder (7)

10. Combined actuating device according to claim 1, characterized by the following features:

a) the spreading device (82b, 83, 90) is inclined towards one another in the radially outward direction converging boundary surfaces of the auxiliary brake chamber (87) on the auxiliary brake piston (83) and on the auxiliary brake cylinder (826,) and at least a cylindrical or spherical body (90) disposed therebetween;

b) the axially movable additional piston (92) has an inclined surface (92a) over which the cylindrical or spherical body (90) radially when the additional piston (92) moves in the tracking direction between the inclined boundary surfaces of the auxiliary brake chamber (87) is moved outwards.

11. Combined actuating device according to claim 10, characterized gekennzeichne ^1, that the additional piston (92) is arranged in a cylinder disposed between the auxiliary brake cylinder (82b) and the auxiliary brake piston (83) space (87)

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a) the spreading device (35,36,37) is formed by the auxiliary brake piston (35, 36) and a cam (37) which is arranged on a shaft and which is rotatable in contact with an active surface (36a) of the auxiliary brake piston (35,36) ;

b) the auxiliary brake piston (35,36) is arranged so that it acts on the service brake piston (34) The invention relates to a combined actuating device for a disc brake according to the preamble of claim 1.

Disc brakes, which today have become a natural element in passenger car construction are increasingly being used in commercial vehicles, especially in the lower to medium weight class with purely hydraulic or combined braking systems, built-in

Disc brakes are used for commercial vehicles in the upper weight class with a pure air brake system became known through the German Offenlegungsschriften 24 42 971 and 24 41 605. It is a matter of Full-lined disc brakes with circumferential, externally open

3 4

fenen brake housing and with an auxiliary brake that can be graduated between the housing regulations

halves in the circumferential direction fixed, axially movable and which are to meet together in the housing of the

arranged, the brake pads bearing the brake rings, housed with disc brakes,

a pneumatic actuator mounted between the brake rings

see actuation as well as the brake housing around 5 type is known from DE-PS 25 08 771 This has

the stationary, holding the brake rings in addition to a pressure medium-actuated service brake

Brake carrier. The device arranged between the pulp rings is a spring-loaded cylinder

Nete pneumatic actuation is here as a ring cylinder auxiliary and parking brake device. The access

and annular piston, the cross-section of the clamping movement of this braking device is

Ring cylinder forms a lying U 10 ne as a spreading device designed Nachstellvorrich-

Transferred according to the guidelines of the legislature on the design.

Laying of brake systems actuated with pressure medium is disadvantageous in this known actuation vehicle and trailers according to § 41 of the direction that the spring in the spring-loaded cylinder in the Road traffic licensing regulations as well as the new passage of time are subject to signs of fatigue and In addition to the service brake system, there is always a risk of breakage, which creates a gene Auxiliary braking system, the effect of which can be graded, results in a certain uncertainty factor. Another disadvantage is that must and which both with the service brake system that with the arrangement of the spring-loaded cylinder zwials can also be combined with the parking brake system see the brake rings through the spring only one known, required limited braking force can be achieved, so that the risk

Such a combination with a parking brake system 20 is not sufficient for an auxiliary braking

Nated auxiliary braking systems are achievable with compressed air braking systems.

gen known, by using a spring-loaded cylinder with the Another disadvantage of the spring-loaded cylinder

arranged outside the wheel brake is the fact that the springs are relatively large to-

as so-called tandem brake cylinders have combined tolerances and thus great braking force

is ned. However, this arrangement requires a lot of space, which can result in differences between the wheels.

so that only the rear wheels for the auxiliary braking The invention is therefore based on the object

or parking brake can be used, an actuating device of the aforementioned

in addition, that one can only be improved in the rear-end manner in such a way that, while avoiding

the parking brake acting on the towing vehicle in the case of spring-loaded cylinders with simple means

fully loaded truck parked on a slope, 30 parking brake is possible

whose trailer cannot be operated from the driver's cab

Parking brake system has not achieved an adequate braking specified invention

can have an effect. In addition, the arrangement would be The features specified in the subclaims

of tandem cylinders for all braked wheels one essentially relate to further configurations that

Vehicle too expensive. 35 both with partial disc brakes and with full-disc brakes

The laid-open specification 24 15 823 describes a benbremsen of the known types with flat and parking brake system for vehicles, which can be used with a U-profile disks. Each disc brake of the type described at the beginning is a mechanical locking device that is equipped in the brake. However, this is the driving state of the parking brake device locked ZuZeuge with a compressed air-controlled hydraulic clamping device, triggered by a control pulse, braking system. Furthermore, the publication makes it transmitted by printing means.
24 26 007 known with a solution which uses an additional device instead of the arrangement of a brake drum on the outside of a complete separate, the usual spring cylinder of the axle-side brake housing part of the solid disk rather replacing device provides a part of the corresponding ben-service brake . 45 modified adjustment device.

In one known from DE-PS 12 57 030 the invention will now be based on the drawing in which

NEN parking brake system, the brakes, according to exemplary embodiments are illustrated, explained in more detail

when they are put on for parking, after they have been released. It shows

be the pressure medium from the service brake cylinders, F i g. 1 a first embodiment of the invention

by locking the piston rod of the brake cylinder actuating device,

also locked mechanically by means of a clamping device. F i g. 1 a another embodiment with a

This multi-part refill piece under the designation "roller lock cylinder" using a

device that has become known, which is located in the case of brakes with a round cross-section,

systems with drum brakes can be found at F i g. 1 b a section through the embodiment

Disc brakes are not adopted in the same way as shown in FIG.

the. since the brake piston is a guide shape according to Fig. La irn essentially one up to the locking

Makes the return stroke in the release position, while the linkage has a right-angled cross-section,

and the transmission organs of a drum brake Fig. Ic a device for tracking the tracking

absorb this path resiliently and create the braking force as well as for locking and automatic

hold remains. A clamping device - like the one in the 60. Adjustment of the brake, which in principle also applies to the

Roller lock cylinder is arranged - has large setting embodiments according to the other figures

ways and is therefore reversible with the great forces and the small ones,

Application paths of the disc brake application not Fig. 2 to 4 further embodiments of the inven-

usable. dung-proof actuating device,

Furthermore, by DE-OS 25 10 193.3 a grain 65 Fig.4a is another embodiment of the device

combination of disc service brakes with spring compression according to Fig. 10,

cher parking brakes have become known, which F i g. 5 and 6 further embodiments of the invention

at the same time the function of a manure in the braking effect.

The F i g. 1 shows a ring cylinder housing of a full disc brake, which is connected via a housing support 2 to a steering knuckle in such a way that it is only can perform an axial movement. A service brake piston 4, an auxiliary brake piston 5 and an adjustment filler 6, which serve as the parts of a locking device for the auxiliary brake piston 5 at the same time Spreading device 5,6 are in the ring cylinder housing 1 built in.

On the auxiliary brake piston 5 is axially parallel inclined surfaces 5a (see also Fig. Ic) a type of toothing attached. These Toothing 5a works in operative connection with the adjustment filler 6, one with a complementary one Inclined surface 6a provided, rotatably mounted about the wheel axis counter ring, like two against each other sliding expanding wedges. The adjustment movements of the Nachstellfüllstückes 6 takes over a working cylinder 7, in which there is a preloaded by means of a spring 8 additional piston 9, the stroke of which by means of a on the piston rod 9a engaging locking device 10 is influenced. This locking device 10, which is known from DE-OS 25 08 771, the adjustment of the clearance of the service brake piston 4 is used Brake pad wear.

The movement of the piston rod 9a is via an articulated connection 11, which through a cutout la is connected in the ring cylinder housing 1 with the adjusting ring acting as an adjusting ring 6, on this transfer.

The locking device 10, however, allows the piston 9 a stroke in the direction of Nachstellfüllstückstückstelle a return stroke only to a limited extent.

The brake rings 12, 13, which are fixedly mounted in the circumferential direction but freely movable axially in the housing support 2, are firmly connected to brake linings 14, 15. When the brake is actuated, the brake pads 14, 15 are in frictional connection via the service brake piston 4 with its contact surface 4a on the one hand and on the other hand with the contact surface \ b of the ring cylinder housing 1 with rotating brake disks 16, 17.

The auxiliary brake piston 5 is prevented from rotating by means of a pin Ic fastened in the ring cylinder housing 1 secured.

Pneumatic connections exist between a compressed air tank 18 and a service brake chamber 19 located between the two pistons 4, 5 via a brake valve 20 and a connection 21 of the ring cylinder housing 1 and between a second compressed air tank 22 and an auxiliary brake chamber 23 located on the other side of the auxiliary brake piston 5 via a Hand brake valve 24 and connection 25 of the ring cylinder housing 1. The chamber 7a of the working cylinder 7 is also connected to the hand brake valve 24 via a connection Ib.

The function of the in Fi g. 1 is as follows:

When the service brake system is applied by actuating the brake valve 20, the control pressure fills the Chamber 19 between the service brake piston 4 and the auxiliary brake piston 5.

While the service brake piston 4 executes the application movement and transmits it to the brake linings 14, 15, the auxiliary brake piston 5 is supported against the adjustment filler 6. The clearance of the service brake piston 4 results from the distance between the two pistons 4 and 5 and is practically through the setting of the Nachstellfüllstückes 6 specified.

If compressed air is applied to the auxiliary brake system by actuation of the hand brake valve 24, then the control pressure fills the chamber 23 and the auxiliary brake piston 5 takes over the application movement Entrainment of the service brake piston 4, which acts as a service brake on the 'brake linings 14.15 transmits.

If the brake is to be applied or locked after the vehicle has come to a standstill, the hand brake valve is activated 24 brought into the corresponding switching position and that in the released state of the parking brake constantly controlled by the hand brake valve 24 in the chamber 7a of the working cylinder 7 pressure, which the Piston 9 häit against the force of spring 8 in Entsperrsteliung, is lowered so that the force of the spring S the Piston 9 pushes into the blocking position. The articulated connection which follows this movement and is connected to the piston rod 9a 11 transmits this movement to the annular Nachstellfüllstück 6 and pushes with its stepped Inclined surfaces 6a against the stepped inclined surfaces 5a of the auxiliary brake piston 5. When descending of the auxiliary brake pressure, the braking effect is maintained by this positive connection, d. H. the parking brake is automatically maintained.

To release the parking brake, the handbrake valve 24 is switched to the corresponding switch position the auxiliary brake chamber 23 is ventilated so that after a corresponding pressure build-up in this chamber 23 the Nachstellfüllstück 6 is force-free and the subsequent ventilation of the working cylinder 7 or its chamber 7a, which unlocks. The locking device 10 located in the front part of the working cylinder 7 causes that the stroke required to lock or lock the parking brake is free, but the Return stroke when releasing the lock only a certain, the maximum release stroke of the service brake piston 4 can make up the corresponding value. In this way, the distance between auxiliary brake pistons 5 and service brake piston 4 by readjusting the auxiliary brake piston 5 even when the lining is worn approximately kept constant. This clearance compensation therefore takes place when the lock is released Parking brake.

The pin Ic mentioned in the construction description of the disc brake, which the auxiliary brake piston 5 against Securing rotation is unnecessary if the naturally rotatable ring cylinder housing 1 with inclined surfaces is provided and the Nachstellfüllstück 6 rests with its flat surface on the piston.

The arrangement according to FIG. 1 can also be used for a partial disc brake can be used. The ring-shaped ones provided on the end face with the inclined surfaces Filler pieces are replaced by individual wedges, and the ring-shaped pistons are replaced by circular pistons.

According to further refinements, the one-piece adjustment filler can be replaced by several parts 6b connected one behind the other (see FIGS. 1 a, 1b). There are wedge-shaped parts 6b elastic, for example

With the help of springs 6c on a carrier 6d, it is achieved that with different stroke heights of the auxiliary brake piston 5 due to different lining wear of a disc to part 6b, the contact pressure of the brake linings is adjusted, so that after the contact of a first part or wedge a further different clamping movement corresponding to the lifting height is possible for the purpose of further compensation, the different

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The control pressure fills the lift heights due to different widths of actuation of the brake valve 53

Columns, e.g. B. 5a and 5b, between the auxiliary brake piston chamber 52 between the service brake piston 34 and

5 and parts 6b . Auxiliary brake piston 35, 36.

The carrier 6c / is in an annular slot while the service brake piston 34 the application

guided ring-shaped part which executes movement during the execution and which is placed on the brake linings 47, 48

form according to Fig. la circular cross-section and when transmits, the piston 35 is supported against the locking

the embodiment of Fig. Ib substantially tion 36 from. The clearance of the service brake piston 34

has a rectangular cross-section, the wedge-shaped resulting from the distance between the two pistons 34 and

Parts 6b are provided with ribs 6e, which are in complemen- 35 with each other and is practically through the adjustment

tary grooves 6 / of the carrier 6d are guided, 10 ment of the locking 36 predetermined,

where in the example shown the ribs and grooves

have a T-shaped cross section. Hand brake valve 57 pressurized with compressed air, so

The movement of the carrier 6d is triggered by the control pressure filling the chamber 56 and the piston 35

Drive of the ball head 11a, the part of the joint takes over the application movement while taking the

binding 11 and by the working cylinder 7 (shown is the service brake piston 34, which the movement as

represents in FIG. ic) is moved. in the event of service braking on the brake linings 47, 48

The carrier 6d is also provided with stops 6g, which also transmits.

For example, in the embodiment shown, the brake should now be applied after the vehicle has come to a standstill

are shaped, provided and are used to unlock the detected or locked, the handbrake is

Parts 6b when releasing the parking brake. 20 valve 57 brought into the corresponding switching position

The F1 g. 2 shows a cylinder housing 30 of a part and the stationary in the released state of the parking brake

disc brake, which via a housing support 32 with dig from the hand brake valve 57 into the chamber 59 of the

an axle tube 33 is connected in such a way that there is only one working cylinder 38 controlled pressure, which the

can perform axial movement. Piston 39 against the force of a spring 61 in unlocking

Em service brake piston 34, which holds an auxiliary brake piston 25 position, is lowered so that the force of spring 61

35, 36 with a locking part 36 as part of a verden piston 39 in the blocking position of the spreading device

locking or arresting device for the auxiliary slide The following this movement, with the piston

bremsko uen 35, 36 which a filler piece in the form of rod 40 connected rack 41 transmits this

a cam 37 serves as a pressure piece, there is movement in the housing on the pinion 43 and presses the filler piece

30 installed, the auxiliary brake piston 35, 36 and 30 or the cam 37 against an inclined surface 36a or

the cam 37 serve as a spreading device. two inclined surfaces of the lock 36. When falling

The locking device consists of an auxiliary or parking brake pressure

Outside the circular housing 30, over the braking effect through this positive connection

Sectional area of the pistons 34 and 35 arranged Ar- maintained, d. H. the parking brake remains off

working cylinder 38, which is automatically maintained as an additional piston 39.

formed piston 39 with its piston rod 40 and to release the parking brake is by switching a toothed rack of the handbrake valve 57 connected to the piston rod 40 into the corresponding switching gene 41, the auxiliary brake chamber 56 is ventilated via a position rotatable in the housing 30, so that after Gerten axis 42 arranged pinion 43 with the Nok- corresponding pressure build-up in this chamber 56 the ken 37 is connected 40 locking 36 is force-free and the subsequent

In the front part of the working cylinder 38 there is ventilation of the working cylinder 38 or its chamber

a locking device 44, which removes the stroke of the rack 59, the locking The in the front part of the ar-

41 locking device 44 located in the direction of the filling piece or cam infeed of the working cylinder 38

possible, but a return stroke only to a limited extent that the locking or locking of the

ße allows this locking device 44, soft from the 45 parking brake required stroke is free, but the

DE-OS 25 08 771 is known, the readjustment of the return stroke when releasing the lock is used only a certain

Release play of the service brake piston 34 in the case of brake pads, the maximum release stroke of the service brake piston

lag wear. 34 can make a corresponding value. To this

The axially fixed but freely movable manner in the circumferential direction is the distance between the auxiliary brake piston 35,

borrowed in the housing support 32 mounted brake rings 45 50 36 and service brake piston 34 by readjusting the

and 46 are firmly connected to the brake linings 47, 48. Auxiliary brake pistons 35, 36 even if the lining is worn

The brake pads 47,48 seven kept almost constant via the service brake. This clearance compensation

piston 34 and contact surfaces 49 of the housing 30 thus takes place each time the lock is released

the brake disc 50 in a frictional connection. the parking brake.

Pneumatic connections exist between a 55 A between service brake piston 34 and auxiliary

A compressed air tank 51 and a plate spring 62 arranged between the two brake pistons 35, 36 are intended as

the piston 34 and 35 located service brake cam-elastic member in the transmission of power through the

iher 52 via a brake valve 53 and connection 54 of the locking device 36, 37 the drop in force due to length

Cylinder housing 30 and between a second gene changes due to temperature fluctuations and

reduce compressed air tank 55 and one on the other side 60 of possible settling paths,

of the auxiliary brake piston 35 located auxiliary brake came- The F i g. 3 shows a full disc brenise whose surrounding

brake disks 70 and 72 with a wheel hub 73 running via a hand brake valve 57 and connection 58

of the cylinder housing 30. A chamber 59 of the working means screw 74 are connected. The fixed ones

• Cylinder 38 is also via a cylinder connection 60. Parts of the brake consist of brake rings 75 and 76

connected to the hand brake valve 57. 65 with the braking with the rotating brake

The function of the in F i g. 2, the actuating disks 70 and 72 shown in frictional engagement

device is as follows: gen 77 and 78, which are fixed in the direction of rotation, axially free

When the service brake system is acted upon, it is movable by means of screws 79 on the axle flange 80

9 10

attached brake carrier 8t is suspended. Explanations and explanations to the Fi g. 1 to 3

The actuation of the brake consists of one that can be easily seen from the drawings. see the brake rings 75 and 76 mounted on the second part. In the brake according to FIG. 4 is

gen ring cylinder 82a, 826 and an auxiliary direction in this axially a full disc brake with one-sided application movable by sealing rings, the structure of which ^{corresponds to that of the disc brake after brake piston 83 F} » S- 1, only that the movement of the face

A filler piece provided with stepped inclined surfaces between the ring cylinder 82a and the auxiliary Brake piston 83 arranged service brake chamber 84 100 takes place via a curved working cylinder 102, is about their connection 85 with the motor vehicle - in this regard, reference is made in particular to Fig. 4a. Au brake valve 86 in connection and one of the ring 10 and the readjustment of the brake, i.e. the cylinder 826 and the auxiliary brake piston 83 enclosed - clearance compensation via a ratchet device 104 This auxiliary brake chamber 87 has its connection 88 (see FIG. 4a). The operation of the parking brake is connected to the handbrake valve 89. also follows by venting the Ar-intermediate that is bent here which the auxiliary brake chamber 87 delimiting the working cylinder, whereby the tension spring 106 wedges the upwardly conical to each other running F! ä-15-shaped filler piece and the working tooth attached to it of the auxiliary brake piston 83 and the ring cylinder of the housing pulls in the stroke locking direction. 82Z) there is a filler piece in the form of a roller conveyor. The arrangement according to FIG. 5 relates to a partial disk or spherical body 90, which is on benbremse with a separate housing attachment 110, which the Sn ^ schr ^ ge / FläcteeTnes arranged underneath, un- auxiliary and parking brake (111,112,113 114) aufmmmt the tension of a spring 91 standing additional 20 Otherwise, this arrangement practically represents a VerKolbens 92 supports. A duplication of the arrangement according to F1 g above the additional KoI. 3, but without Ben 92 arranged chamber 93 is with the hand-service brake piston and litftspie setting. the brake valve 89 in connection. As you can see immediately, function essentially corresponds to the Actuation of the motor vehicle brake valve 86 borrowed the arrangement according to Figure 3. As a neighbor becomes the service brake chamber 84 via connection 85 25 development is not provided, must be ventilated with each parking brake The pressure that builds up in it moves the entire hub consisting of the Luithub and the Beder on one side the ring cylinder 82a with brake ring 76 is designed to be worn out, and brake lining 88 against the rotating brake disk in FIG. 6 is one of the brakes according to F1 g. 1 en spre-72 and on the other hand the effect shown in the opposite full disc brake. It is about In the opposite direction, 30 acting on the auxiliary brake piston 83 also involves a series connection of operating brake piston pressure a movement of the auxiliary brake piston 83, the ben 120 and auxiliary brake piston 122. The Vernegehing via the roller 90 on the ring cylinder 826 via the auxiliary brake piston is carried out by three on the transfer so that its wedge-shaped filler pieces 124 attached to the brake ring 75 are distributed by Senbeltg to the rotating brake disc 70 ken of the control pressure by the force of the provided-when Pressing the hand brake valve 89 will be pressed the 35 NEN spring 126 radially outward. Of the Auxiliary brake chamber 87 is ventilated via connection 88. The lower pin 130 sealed by an O-ring 128 The pressure that builds up in it moves on the one hand to relieve the pressure in the pressurized body the auxiliary brake piston 83 lying against the inner surface of the space of the auxiliary brake wedge-shaped fullstuk ring cylinder 82a, so that this one at the Betriebskes.

brake actuation of the brake described causes 40 _:

and on the other hand, the ring cylinder 826 is used for 9 sheets of drawings

The filler piece moves directly with its brake ring 75 and brake lining 77 against the other brake disc 70
or the roller 90 rests loosely or not by one
drawn spring pressed or pulled on a 45
Inclined surface 92a of the additional piston 92, since the in
Chamber 93 controlled via the hand brake valve 89
Push the additional piston 92 against the tension
the spring 91 holds in a position that the roller 90
not influenced only when an auxiliary braking 50 is completed
the pressure in the
Chamber 93 dismantled, so that the force of the spring 91 in
Direction of tension a movement of the additional

Piston 92 causes and the roller 90 through the inclined ■; ·

Surface 92a of the additional piston 92 upwards
against the wedge-shaped surfaces is pushed,
soft through the surfaces facing the chamber 87

of the auxiliary brake piston 83 and the annular cylinder 826 ·. . ; -

form. ■ - *, ·

The parking brake is thus locked in its position 60 "· ',

To release the parking brake is when shifting.

of the handbrake valve in the corresponding switching position

ment the chamber 87 ventilated so that the filler or ·. >. <>, "; _t . ' - -,

the roller 90 is free of force and the subsequent loading ■; ' _ '

ventilation of chamber 93 removes the block 65 » * ■, ·

The embodiments according to Fig.4 to 6 should -, ^ Λ ,, _f

can only be described very roughly, since their structure χ - «'■■' ^ -

and functionality taking into account the detailed

Claims (1)

Patent claims: 1. Combined actuating device for a disc brake with an operating an auxiliary and a parking brake device and with an automatic adjustment device for the clearance with the following features: