WO2007122077A1

WO2007122077A1 - Floating-caliper brake

Info

Publication number: WO2007122077A1
Application number: PCT/EP2007/053210
Authority: WO
Inventors: Chi-Thuan Cao; Dirk Hofmann; Herbert Vollert; Willi Nagel; Bertram Foitzik; Bernd Goetzelmann
Original assignee: Robert Bosch Gmbh
Priority date: 2006-04-24
Filing date: 2007-04-03
Publication date: 2007-11-01
Also published as: DE102006018953A1

Abstract

The invention relates to a floating-caliper brake (1) having one fixed and one moveable friction brake lining (6, 7) and having a for example hydraulic or electromechanical actuating device (8) for pressing the moveable friction brake lining (7) against the brake disk (3). The invention proposes a device (10) for adjusting an air play on both sides of the brake disk (3) as the floating-caliper brake (1) is released. When the floating-caliper brake (1) is released, the brake disk (3) is freely rotatable, and grinding noises and lining wear when the floating-caliper brake (1) is released are avoided.

Description

Floating caliper brake

State of the art

The invention relates to a floating caliper brake with the features of the preamble of claim 1.

Floating caliper brakes are known per se. They have a transversely displaceable to the brake disc, so-called. Floating caliper, in which a friction brake pad firmly on one side of the brake disc, ie rests immovably. A floating caliper movable friction brake pad is disposed on the other side of the brake disc and is pressed to actuate the floating caliper brake with an actuator against the brake disc. By pressing the movable friction brake lining against one side of the brake disk, the floating caliper is displaced transversely to the brake disk and presses the fixed friction brake lining against the other side of the brake disk. The actuating device can be, for example, hydraulic, pneumatic or electromechanical. Electromechanical floating caliper brakes typically include an electric motor, a reduction gear, and a rotation / translation conversion gear for urging the movable friction pad against the brake disk. The rotation / translation conversion gear can be a screw drive or, for example, also a pivoting cam, which by pivoting the movable friction brake pad presses against the brake disc. Also, linear electromechanical actuators with, for example, an electromagnet or a piezo element for pressing the movable friction brake lining against the brake disc are possible.

The floating caliper brake may include a self-energizing device that converts a frictional force applied to the friction brake pad against the brake disk pressed against the rotating brake disk into a pressing force that presses the friction brake pad against the brake disk in addition to a pressing force applied by the actuator. The braking force is thereby increased. Mechanical self-energizing devices include, for example, a wedge or ramp mechanism that supports the movable friction brake pad at an angle to the brake disk in the caliper. The support causes a support force with a force component perpendicular to the brake disc, which represents the additional pressure force.

When releasing the floating caliper brake, it is necessary or at least desireable to achieve a clearance between the friction brake linings and the brake disc. Ventilation means a gap between the brake disc and the friction brake linings. In the case of hydraulic floating caliper brakes, a sealing ring which seals a hydraulic piston in a cylinder in the floating caliper causes the clearance. If the movable friction brake lining with the hydraulic piston is pressed against the brake disk, the sealing ring, for example a square or quad ring, deforms elastically. When releasing the floating caliper brake, the sealing ring resumes its original shape, moving the hydraulic piston away from the brake disc by the clearance. The movable friction brake pad either moves with the hydraulic piston or it is still loosely against the brake disc. However, the floating caliper is not moved, ie between the fixed friction brake pad and the brake disc is no clearance. When releasing electromechanical floating caliper brakes usually moves the electromechanical actuator, the movable friction brake pad back to its original position, wherein it lifts the movable friction brake pad from the brake disc and thus adjusts a clearance. Again, no clearance between the fixed friction brake lining and the brake disc is adjusted by a movement of the floating caliper transversely to the brake disc.

Disclosure of the invention

The floating caliper brake according to the invention with the features of claim 1 has a device for adjusting a clearance that when releasing the

Floating caliper brake on both sides of the brake disc sets a clearance between the friction brake linings and the brake disc. It has, for example, an elastic element which upon actuation of the

Floating caliper brake is elastically deformed and deformed when loosening while adjusting the clearance. The elastic element may be, for example, rubber-elastic or pneumatic (air or gas pressure) or a

Have spring element. According to claim 2, the means for adjusting the clearance is passive. By this is meant that they are the ones for setting the

Lüftspiels receives and stores energy required during actuation of the floating caliper brake, for example by deformation of an elastic element.

The dependent claims have advantageous refinements and developments of the invention specified in claim 1 to the subject.

Claim 4 provides a retraction lock for the device for adjusting the clearance. A retraction lock is similar to a freewheel, it allows a relative movement of two parts in a direction of movement and locks against a relative movement in the opposite direction. In contrast to a freewheel, the retraction lock operates linearly, ie the relative movement is a linear movement, but preferably not necessarily a straight motion. The retraction lock can have like a freewheel pivotable locking elements or pawls, which act positively or positively. Also, a plate spring or a stamped spring plate with obliquely to the direction of spring tongues, which rest with free end edges resiliently on a surface of a part to be locked and allow movement due to their inclination in one direction and lock against movement in the opposite direction, can as locking elements of Use retraction lock. The retraction lock according to the invention allows movement in the direction of actuation of the floating caliper brake and blocks against movement in the release direction. The size of the clearance thus adjusts itself and it causes a wear adjustment.

Advantages of the invention

The invention has the advantage that when releasing the floating caliper brake on both sides of the brake disc a clearance between the brake disc and the friction brake pads, not necessarily the same size, clearance is set. A residual braking torque is avoided, as well as grinding the friction brake linings on the brake disc, especially when cornering, at least if the friction brake linings moved along and not only the floating caliper and the actuator are reset. Especially with a stiff floating caliper, the invention has the advantage of lifting both friction brake linings from the brake disc, so that the brake disc is freely rotatable and no lining wear occurs.

Brief description of the drawings

The invention will be explained in more detail with reference to embodiments illustrated in the drawings. Show it Figure 1 is a schematic representation of an inventive

Floating caliper brake;

Figure 2 is a block diagram of a device for adjusting a clearance of the floating caliper brake of Figure 1 according to the invention;

Figure 3 is a schematic representation of the device for adjusting a clearance of Figure 2;

Figure 4 shows a first embodiment of an inventive

Floating caliper brake;

Figure 5 shows a second embodiment of a floating caliper brake according to the invention;

Figure 6 is a sectional view taken along line Vl-Vl in Figure 5; and

Figure 7 is a schematic representation of another embodiment of a floating caliper brake according to the invention.

The drawings are to be understood as schematic and simplified representations for explanation and understanding of the invention.

Embodiments of the invention

The inventive floating caliper brake 1 shown in Figure 1 has a caliper 2 in the form of a frame saddle. The frame saddle 2 has two mutually and to a brake disc 3 parallel frame plates 4, which are connected by tie rods 5 outside of a circumference of the brake disc 3 with each other. In the caliper 2 is a friction brake pad 6 immovably, which will be referred to below as a fixed friction brake pad 6. The fixed friction brake lining 6 is located on one side of the brake disc 3. A movable friction brake lining 7 is on the other side of the Brake disc 3 arranged in the brake caliper 2. To actuate the floating caliper brake 1, the movable friction brake lining 7 can be pressed with an actuating device 8 against the brake disk. The caliper 2 is in wheel carrier fixed guides 9, which are preferably arranged in a plane with the brake disc 3, transversely to the brake disc 3 displaceable, the caliper 2 is therefore a so-called. Floating caliper. The transverse to the brake disc 3 sliding guide of the caliper 2 is also referred to as floating storage. Is pressed to brake the movable friction brake pad 7 with the actuator 8 against one side of the brake disc 3, the brake caliper 2 shifts in the guide 9 transversely to the brake disc and pushes the fixed friction brake lining 6 against the other side of the brake disc 3, with both Reibbremsbelägen 6, 7 is braked. When releasing the floating caliper brake 1, the movable friction brake lining 7 with the actuating device 8 is lifted off the brake disk 3, so that a gap called clearance between the brake disk 3 and the movable friction brake lining 7 is formed. A device 10 for adjusting the clearance engages the caliper 2 and moves it transversely to the brake disc 3, so that on both sides of the brake disc 3 is a clearance between the friction brake linings 6, 7 and the brake disc 3. The brake disc 3 is freely rotatable. The clearance does not necessarily have to be the same size on both sides of the brake disk 3.

Figure 2 shows a block diagram of the device 10 for adjusting the clearance on both sides of the brake disc 3 of the floating caliper 2. The device 10 for adjusting the clearance has a retraction lock 11, which allows a relative movement of two parts in one direction and against a relative movement in opposite Direction locks. For this purpose, it has, for example, locking elements 12 in the form of pawls, which cooperate with a sawtooth toothing 13 (Figure 3). It is a form-locking retraction lock. Also, a non-positive retraction lock, wherein the locking elements by their inclination a Allow movement only in one direction and lock against movement in the opposite direction by frictional force is possible (not shown). The blocking elements 12 have play in the direction of movement. In this case, an already existing game of retraction lock 11 suffice, for example, the game of interacting with the teeth 13 locking elements 12th

Skip the locking elements 12 due to pad wear a tooth of the toothing 13, pivot the spring-loaded by the leaf springs 22 locking elements 12 from the tooth tip of the skipped tooth inwards to the tooth root of the next tooth. This results in an axial clearance, in a release of the floating caliper brake 2 takes place a return movement of the plunger 18, so that the friction brake pads 6, 7 are lifted in any case from the brake disc 3, even if except the axial play described here between the locking elements 12 and the toothing 13 no game is provided constructively.

Also constructive a defined and limited game can be provided. The game is designated in Figure 2 by the reference numeral 14, it may for example be realized by a sliding sleeve whose movement is limited by axial stops. In Figure 3, the locking elements 12 are pivotally connected to leaf springs 22 with a sliding sleeve 15 and resiliently acted upon. In the sliding sleeve 15 engages a stop 16 of a housing 17 with defined limited play in the direction of movement. The housing 17 is attached, for example, to a brake holder or a wheel carrier, ie at a fixed distance from the brake disc 3. A plunger 18, which has the teeth 13, engages the caliper 2. About springs 19, the stops 16 are based on the plunger 18. In the illustrated embodiment, the springs 19 springs, but there are also tension springs or other spring elements possible. Other elastic elements instead of the spring elements 19 can be used (not shown). The adjustment of the clearance with the device 10 according to the invention for the establishment of the clearance is carried out as follows: To operate the floating caliper brake 1, as already stated, the movable friction brake lining 7 is pressed with the actuating device 8 against one side of the brake disc 3. As a result, the caliper 2 is displaced transversely to the brake disc 3 and presses the fixed friction brake lining 6 against the other side of the brake disc 3, which is braked. The displacement of the caliper 2 biases the spring elements 19, which may have a bias when dissolved floating caliper brake 1.

To release the floating caliper brake 1, the movable friction brake lining 7 is lifted off the brake disc 3 with the actuating device 8. The spring elements 19 of the device 10 for adjusting the clearance relax and move the plunger 18, the caliper 2 back to its original position. In this case, the movable friction brake lining 6 is lifted off the brake disk 3 and there is a clearance between the two friction brake linings 6, 7 and the brake disk 3 on both sides of the brake disk 3.

If, when the floating caliper brake 1 is actuated, the play 14 of the device 10 for adjusting the clearance is overcome, the toothing 13 moves relative to the locking elements 12. If the locking elements 12 engage the next tooth of the toothing 13, the device 10 moves to Setting the clearance no longer back to their original position, but remains offset by a tooth. The game 14 ensures that, nevertheless, when relaxing the floating caliper brake 1, a clearance is set on both sides of the brake disc 3. The retraction lock 11 causes a wear adjustment, the clearance on the side of the fixed friction brake lining 6 is always set to about the game 14. Deviations arise due to the tooth width of the toothing 13 or in a frictional retraction by their game. In Figures 1 and 2, the support of the device 10 for adjusting the clearance is mounted at a fixed distance from the brake disc 3, the attachment is symbolically represented by an abutment 20. The attack on the caliper 2 or optionally also on the fixed or on the movable friction brake lining 6, 7 is shown in Figure 2 with the symbol 21 of a brake caliper. The abutment 20 may be referred to as Radträgerfestes component. The friction brake linings 6, 7 and the brake caliper 2 are parts of the floating caliper brake 1, to which the device 10 for adjusting the clearance can selectively attack.

FIG. 4 shows a floating caliper brake 30 with a device 31 for adjusting the clearance according to the invention. The floating caliper brake 30 has a hydraulic actuating device 32 with a brake piston 33 for pressing a movable friction brake lining 34 against a brake disk 35. The brake piston 33 is received axially displaceably in a bore 36 of a floating caliper 37. A quad ring 38 seals the piston 33 in the bore 36.

The device 31 for adjusting the clearance is arranged on the side of the piston 33 and the movable friction brake lining 34 of the floating caliper 37. It has a plunger 39 which is arranged coaxially with the piston 33 and connected to the caliper 37, for example screwed. The plunger 39 is received axially displaceably in a housing 40 of the device 31 for adjusting the clearance. As an elastic or spring element, the means 31 for adjusting the clearance on a helical compression spring 41, which is supported in a housing cover 45 and which acts on the plunger 39 in the direction of the brake disc 35.

A retraction lock of the means 31 for adjusting the clearance comprises a conical plate spring 42 as a blocking element, which cooperates with the plunger 39. The plunger 39 passes through a center hole of the plate spring 42. Due to its conical shape, the plate spring 42 locks the plunger 39 by Friction against movement in the direction of the brake disc 35 and allows movement of the brake disc 35 away.

The blocking element of the retraction-forming disc spring 42 is inserted into a short piece of pipe 43, the game in the axial direction in the housing 40 of the device 31 for adjusting the clearance has.

For actuation of the floating caliper brake 30, the piston 33 is hydraulically pressurized and pushes the movable friction brake lining 34 against the brake disc 35. Upon further pressurization of the caliper 37 running caliper moves transversely to the brake disc 35 and pushes a fixed friction brake pad 44 against the other side of the Brake disc 35, which is braked by it. The displacement of the caliper 37 moves the plunger 39 of the device 31 for adjusting the clearance of the floating caliper brake 30 axially in the housing 40 and thereby increases the tension of the helical compression spring 41, which is biased. With the plunger 39, the plate fields 42 and the pipe section 43 moves with.

To release the floating caliper brake 30, the hydraulic pressure is released and the elastically deformed quad ring 38 pulls the piston 33 a little way back into the bore 36 of the caliper 37. The movable friction brake lining 34 is lifted from the brake disc 35, so that a clearance between the brake disc 35th and the movable friction brake lining 34 is formed. The helical compression spring 41 of the device 31 for adjusting the clearance moves the plunger 39 and with it the caliper 37 back to the starting position, which is determined by conditioning of the pipe section 43 in the housing 40. As a result, the fixed friction brake lining 44 is lifted off the brake disk 35, so that a clearance is also created on this side of the brake disk 35. It is the original clearance on both sides of the brake disc 35 as before actuation of the floating caliper brake 37 is set. The blocking element of the retraction-forming plate spring 42 locks the plunger 39 against a Further movement beyond the initial position and ensures the bias of the elastic element forming helical compression spring 41.

Is the displacement of the caliper 37 at an actuation of the floating caliper brake 30 as a result of example pad wear greater than the game of the pipe section 43 in the housing 40, the plunger 39 moves upon actuation of the floating caliper brake 30 relative to the blocking element forming the plate spring 42. The return movement of the plunger 39 and with him the caliper 37 when releasing the floating caliper brake 30 is shortened by the path of the relative movement between the plunger 39 and the plate spring 42. In this way, a wear adjustment is achieved, the clearance between the friction brake linings 34, 44 and the brake disc 35 regardless of wear of the friction brake linings 34, 44 always the game of the pipe section 43 in the housing 40th

The device 31 for adjusting the clearance of the floating caliper brake 30 is passive, it requires no external energy, but their helical compression spring 41 is tensioned upon actuation of the floating caliper brake 30 from the caliper 37 and stores the necessary for the provision or adjustment of the clearance on both sides of the brake disc 35 Energy. The device 31 for

Adjustment of the clearance is wheel carrier, so fixed at a fixed distance from the brake disc 35, it is for example on a brake holder, a

Wheel carrier or attached to a firmly connected to the wheel carrier component. To the means 31 for adjusting the clearance at a

To be able to reset change of the friction brake linings 34, 44 is the

Housing cover 45 from the housing 40 solvable. The plunger 39 is released from the caliper 37, pulled out of the locking element of the retraction plate forming spring and reinserted.

The floating caliper brake 50 of Figure 5, in contrast to the floating caliper brake 30 of Figure 4 is an electromechanical actuator with an electric motor 51 and a gear 52 for Pressing a movable Reibbremsbelags 53 against a brake disk 54. Incidentally, structure and function of the floating caliper brakes 30, 50 from FIGS. 4 and 5 are the same.

The floating caliper brake 50 of Figure 5 has two means 55 for adjusting the clearance on both sides of a caliper 57. Tappet 56 of the means 55 for adjusting the clearance are here at the same time bolts of a floating bearing, which hold the caliper 57 transversely to the brake disk 54 slidably, d. H. the caliper 57 is again a floating caliper. The

Plunger 56 are mounted in a plane with the brake disc 54 transversely to this displaceable in housings 58 of the means 55 for adjusting the clearance. The means 55 for adjusting the clearance thus also form the brake holder of the floating caliper brake 50 at the same time.

The construction and function of the means 55 for adjusting the clearance are similar to the device 31 for adjusting the clearance of Figure 4. The means 55 for adjusting the clearance of Figure 5 also have a helical compression spring 59 as an elastic or spring element, which the plunger 56th acted upon axially and the brake caliper 57 upon release of the floating caliper brake 50 and thereby adjusts the clearance between the friction brake linings 53, 60 and the brake disc 54 on both sides of the brake disc 54.

A retraction lock of the device 55 for adjusting the clearance comprises a stamped spring plate as a blocking element 61, which can be seen in the cross-sectional view in Figure 6 in view. The locking element 61 has a ring 62, projecting from the two oppositely disposed spring tabs 63 inwardly. The spring tabs 63 are inclined and under elastic bias on a sleeve 64 which is displaceable due to the inclination of the spring tabs 63 in one direction relative to the spring tabs 63 and locked against relative movement in the opposite direction. The sliding sleeve 64 is displaceable on one end of the plunger 56, whose end is provided by milling or otherwise with two mutually parallel surfaces 65 (Figure 6). The parallel surfaces 65 are slightly longer than the sliding sleeve 64, which is thereby slidable by the difference in length between the parallel surfaces 65 and the sliding sleeve 64 on the plunger 56, ie game has. If, upon actuation of the floating caliper brake 50, the caliper 57 is displaced transversely to the brake disk 54 by no more than the play of the sliding sleeve 54 on the tappet 56, the helical compression spring 59 of the device 55 for adjusting the clearance resets the caliper 57 to the initial position and thereby the brake caliper 57 Ventilation on both sides of the brake disk 54 a. If the displacement of the caliper 57 is greater than the play of the sliding sleeve 64 on the plunger 56, the sliding sleeve 64 abuts the end of the parallel surfaces 65 and moves relative to the locking member 61. The backward displacement of the caliper 57 upon release of the floating caliper brake 50 is shortened accordingly, so that lining wear is compensated. In addition, reference is made to the comments on Figure 4 reference.

The blocking element 61 is inserted into a cover 67 of the device 55 for adjusting the clearance. After loosening screws 66, the lid 67 and with it the locking member 61 can be axially rotated so far that the spring tabs 63 reach the area of the parallel surfaces 65 and thereby released from the sliding sleeve 64. The retraction lock is unlocked in this way, the Means 55 for adjusting the clearance can be reset to change the friction brake pads 53, 60.

The floating caliper brake 70 shown in Figure 7 has a ramp 71 which extends at an angle to the brake disc 72 at an angle. The ramp 71 has over its course a constant ramp angle, it is the special case of a wedge. For actuating the floating caliper brake 70, a movable friction brake lining 73 is displaceable along the ramp 71. For displacement, the floating caliper brake 70 has an electromechanical Actuator with an electric motor 74, which moves the ramp body 77 via a gear not shown separately along the ramp 71 in the brake caliper 78. On the ramp body 77 of the movable friction brake lining 73 is attached. By moving the ramp body 77 with the movable friction brake lining 73 along the ramp 71, the movable friction brake lining 73 is pressed against the brake disk 72. Trained as a floating caliper brake caliper 78 is moved transversely to the brake disc 72 and presses a fixed friction brake lining 79 against the other side of the brake disc 72, which is braked by it. This is known per se and has been described several times above. The rotating brake disk 72 exerts a frictional force on the friction brake lining 73 pressed against it, which acts on it in the direction of a narrowing gap between the ramp 71 and the brake disk 72. The support of the movable Reibbremsbelags 73 via the ramp body 77 on the ramp 71 of the caliper 78 causes a supporting force having a force component perpendicular to the brake disc 72. This force component forms a pressing force which presses the movable friction brake lining 73 against the brake disk 72 in addition to a pressing force applied by the actuating device. The floating caliper brake 70 has a self-energization that converts a frictional force exerted by the rotating brake disc 72 onto the movable friction brake pad 73 pressed against it when braking against it into a pressing force. The self-reinforcement is effected by a ramp mechanism having the ramp body 77 and the ramp 71.

A spring element 75 acts as a floating caliper trained 78 caliper transverse to the brake disc 72 so that the movable

Reibbremsbelag 73 to the brake disc 72 is moved. The spring element 75 is supported in a stationary manner, for example, on a brake holder or a wheel carrier, which are shown here symbolically as an abutment 76. The ramp body 77 has an inclined surface or bevel 82 which is pressed by the spring element 75 against a pin 80 or the like. Retention element and upon displacement of the Ramp body 77 is held in contact with the pin 80. The pin 80 is fixedly mounted like the spring element 75. When the floating caliper brake 70 is deactivated, the pin 80 prevents the spring element 75 from pressing the movable friction brake lining 73 against the brake disk 72; the abutment 82 on the pin 80 holds the movable friction brake lining 73 at a distance from the brake disk 72 and produces the desired clearance.

Upon displacement of the ramp body 77 along the ramp 71 of the caliper 78 for operating the floating caliper brake 70, the slope 82 moves along the pin 80, wherein the ramp body 77 moves due to the slope 82 transversely to the brake disc 72 and the movable friction brake lining 73 against the brake disc 72 presses. A further displacement of the ramp body 77 shifts in the manner described, the brake caliper 78 transversely to the brake disc 72 and pushes the fixed friction brake lining 79 against the other side of the brake disc 72. The brake disc 72 is thereby braked.

To release the floating caliper brake 70, the ramp body 77 is moved back along the ramp 71 of the caliper 78 along with the slope 82 of the ramp body 77 along the pin 80 moves back and the caliper 78 resets. The slope 82 has a smaller pitch than the ramp 71, so that the clearance between the two friction brake linings 73, 79 and the brake disc 72 on both sides of the brake disc 72 again sets. The spring element 75, which acts on the brake caliper 78 transversely to the brake disk 72, the bevel 82 of the ramp body 77 and cooperating with the pin 80 form a means 81 for adjusting a clearance between the Reibbremsbelägen 73, 79 and the brake disc 72nd

In the illustrated embodiment of the invention, the pin 80 is sprung to provide for different wear of the friction brake linings 73, 79 a balance. A spring force of the pin 80 is greater than a spring force of the Spring member 75 which acts on the caliper 78, so that the abutment of the pin 80 on the slope 82 determines the position of the caliper 78.

Claims

Robert Bosch GmbH, 70469 StuttgartPatent claims

A floating caliper brake having a fixed and a movable friction brake lining (6, 7, 34, 44, 53, 60, 73, 79) and an actuating device (8, 32, 51, 52, 74, 75, 76), with which the movable friction brake lining (7; 34; 53; 73) for actuating the floating caliper brake (1; 30; 50; 70) can be pressed against a brake disk (3; 35; 54; 72), characterized in that the floating caliper brake (1; 30; 50; 70) comprises means (10; 31; 55; 81) for adjusting a clearance which upon release of the floating caliper brake (1; 30; 50; 70) on both sides of the brake disc (3; 35; 54; 72) Lüftspiel between the friction brake linings (6, 7, 34, 44, 53, 60, 73, 79) and the

Adjust brake disc (3; 35; 54; 72).

2. Floating caliper brake according to claim 1, characterized in that the device (10; 31; 55; 81) is passive.

3. Floating caliper brake according to claim 1, characterized in that the device (10; 31; 55; 81) for adjusting the clearance comprises an elastic element (19; 41; 59) which upon actuation of the floating caliper brake (1; 30; 50 ; 70) is elastically deformed and deforms when loosening the floating caliper brake (1; 30; 50; 70) while adjusting the clearance.

4. floating caliper brake according to claim 1, characterized in that the means (10; 31; 55; 81) for adjusting the clearance a retraction lock (11; 42, 43; 61, 64), which movement in the direction of actuation of the floating caliper brake (1 ; 30; 50; 70) and against movement in the release direction of the floating caliper brake (1;

30; 50; 70) locks.

5. floating caliper brake according to claim 4, characterized in that the retraction lock (11; 42, 43; 61, 64) has a limited play in the direction of movement.

6. floating caliper brake according to claim 4, characterized in that the retraction lock (42, 43; 61, 64) is unlockable.

7. Floating caliper brake according to claim 1, characterized in that the device (10; 31; 55; 81) for adjusting the clearance on a part (2,4; 37; 56; 78) of the floating caliper brake (1; 30; 50; 70 On the one hand and a Radträgerfesten component on the other hand attacks.

8. floating caliper brake according to claim 1, characterized in that the means (55) for adjusting the clearance comprises a guide for the caliper (57), which leads the caliper (57) transversely to the brake disc (54) movable.

9. Floating caliper brake according to claim 1, characterized in that the floating caliper brake (1; 30; 50; 70) has a mechanical self-boosting device with a ramp mechanism (71,77) and the means (81) for adjusting the clearance at an angle to the brake disc (72) extending bevel (82) of the movable friction brake lining (73) engages.

10. floating caliper brake according to claim 9, characterized in that the slope (82) has a smaller pitch than the ramp mechanism (71, 77).