Method and device for braking rotating and/or slewing gears

1. Mobile crane having a revolving superstructure and rotating gears for said revolving superstructure and comprising at least one dynamic service brake designed for decelerating a rotating movement of the rotating gear and at least one static holding brake designed for locking the rotating gear being in a standstill in one position, by means of which the rotating and/or slewing gear is configured to be locked in one position, wherein at least one sensor ( 14 ) is assigned to the dynamic service brake and/or to the static holding brake ( 11 a , 16 ), said sensor detecting the current movement of the rotating and/or slewing gear, and said sensor ( 14 ) being connected to a controller ( 13 , 19 ) that detects the actuation of the dynamic service brake ( 11 , 11 a ) and that, in case of a failure of said dynamic service brake ( 11 a ) being detected by a continued rotating movement of the rotating gear although the dynamic service brake ( 11 a ) is continually actuated said controller actuates the static holding brake ( 16 ), wherein the static holding brake ( 16 ) is regulated at a specified clock rate via the controller ( 13 , 19 ) for decelerating the rotating movement of the rotating gear to a standstill.

2. The device according to claim 1 , wherein the sensor ( 14 ) for detecting the rotating and/or pivoting movement of the rotating and/or slewing gear is designed as a rotational speed sensor or a hydraulic flow-rate sensor.

3. The device according to claim 1 , wherein the clock rate of the static holding brake ( 16 ) actuated by the controller ( 13 , 19 ) is designed fixed or variable.

4. The device according to claim 1 , wherein static holding brake ( 16 ) remains permanently closed after standstill of the rotating and/or of the slewing gear as long as the dynamic service brake ( 11 a ) is still in operation.

5. The device according to claim 1 , wherein when a minimum rotational speed of the rotating and/or slewing gear is fallen short of, the static holding brake ( 16 ) remains permanently applied as long as the dynamic service brake ( 11 a ) remains in operation.

6. A method of controlling a mobile crane having a revolving superstructure and rotating gears for said revolving superstructure, the method comprising the process steps of:

a) utilizing a static holding brake ( 16 ) designed for locking the rotating gear being in a standstill in one position for regulated braking of rotating gears of mobile cranes having a revolving superstructure and rotating gears for said revolving superstructure,

b) detecting a rotating movement of the rotating gears by means of a sensor ( 14 ),

c) starting of a clocked actuation of the static holding brake ( 14 ) for the rotating gear in case of a failure of a dynamic service brake ( 11 a ) designed for decelerating a rotating movement of the rotating gears of mobile cranes having a revolving superstructure and rotating gears for said revolving superstructure being detected by a continued actuation of a dynamic service brake ( 11 a ) together with a continued rotating movement of the rotating gears by means of a controller ( 13 , 19 ) connected to the sensor ( 14 ) during the rotating process,

d) actuating the static holding brake ( 16 ) via a brake pedal and/or control lever assigned to the mobile crane having a revolving superstructure and rotating gears for said revolving superstructure,

e) actuating the static holding brake ( 16 ) via the controller ( 13 , 19 ), wherein actuating the static holding brake ( 16 ) is rotational speed dependent,

f) evaluating the brake pedal position and/or control lever position for the actuation of the static holding brake ( 16 ) and permanent application of the static holding brake ( 16 ) in case of a complete standstill of the rotating gear or when the speed of the rotating gear falls below a minimum rotational speed of 0.01 to 0.2 revolutions/minute.

7. A work machine having a device according to one of claim 1 , 2 , 3 , 4 , 5 , or 6 , wherein the work machine is a work machine with a revolving superstructure.

8. The work machine according to claim 7 , wherein the work machine is a mobile crane.

9. The work machine according to claim 7 , wherein the work machine is a revolving platform.