Mobile crane

• US 20050258122A1
• Filed: 05/18/2005
• Published: 11/24/2005
• Est. Priority Date: 05/19/2004
• Status: Active Grant

• Current Assignee: Liebherr-Werk Ehingen GmbH (Liebherr-International AG)
• Original Assignee: Liebherr-Werk Ehingen GmbH (Liebherr-International AG)
• Inventors: Morath, Erwin
• Granted Patent: US 8,777,027 B2
• Time in Patent Office: Days
• US Class Current: 212/294
• CPC Class Codes: B66C 13/16 Applications of indicating, registering, or weighing devices in crane hooks B66C1/40; in safety gear B66C15/00; weighing-apparatus G01G; remote indicating in general G08
• CPC Class Codes: B66C 13/18 Control systems or devices exclusively for rope, cable, or chain winding mechanisms B66D1/40
• CPC Class Codes: B66C 13/46 Position indicators for suspended loads or for crane elements
• CPC Class Codes: B66C 23/72 Counterweights or supports for balancing lifting couples
• CPC Class Codes: B66C 23/78 Supports, e.g. outriggers, for mobile cranes
• CPC Class Codes: B66C 23/825 Bracing equipment acting in horizontal direction
• CPC Class Codes: G01D 5/48 using wave or particle radiation means G01D5/26 takes precedence

Abstract

The present application relates to a mobile crane comprising a telescopic boom which has a hinged section and at least one telescopic section which can be telescoped out of it, or to a crawler-mounted crane. In accordance with one embodiment, as a position detection device, it has at least one transducer in the form of an inductively operating transponder, a receiver unit for the sensing of the position of the transducer, a control device for control in dependence on a signal of the receiver unit, as well as a signal transmission device in the form of a databus for the transmission of the signal data from the receiver unit to the control device.

Claims

1. A mobile crane comprising a telescopic boom which has a hinged section and at least one telescopic section which can be telescoped out of it, or a crawler-mounted crane, comprising:

a position detection device, said detection device having at least one transducer in the form of an inductively operating transponder, a receiver unit for the sensing of the position of the transducer, a control device for control in dependence on a signal of the receiver unit, and a signal transmission device in the form of a databus for the transmission of signal data from the receiver unit to the control device.

2. A mobile crane in accordance with claim 1, wherein a transponder is fixedly installed in the receiver unit and transmits a pre-determined function signal for continuous monitoring of a functioning of the position detection apparatus.

3. A mobile crane in accordance with claim 1, wherein it has at least one guy-rope and a rope length adjustment apparatus having a rope-holding apparatus for adjustment of a desired rope length of the guy-rope, with the rope length adjustment apparatus having at least one transducer secured to the guy-rope whose position can be sensed by the receiver unit and with the control device controlling the rope-holding apparatus in dependence on said signal of the receiver unit.

4. A mobile crane in accordance with claim 3, wherein it has a guying for the telescopic boom which has at least one guy support supported at a section of the boom, where said guy-rope is supported by the guy support.

5. A mobile crane in accordance with claim 4, wherein the receiver unit is arranged at the guy support.

6. A mobile crane in accordance with claim 4, wherein a rope winch is provided for hauling in of the guy-rope, and where the rope winch is preferably arranged at the guy support and is controllable in dependence on the signal of the receiver unit.

7. A mobile crane in accordance with claim 6, wherein the rope winch forms the rope-holding device.

8. A mobile crane in accordance with claim 3, wherein the at least one transducer is integrated in a ring seated on the guy-rope.

9. A mobile crane in accordance with claim 1, wherein two guy supports are provided which are spread apart in a V-shape in an operating position and a guy-rope runs over each guy support, with transducers being secured at every guy-rope at rope sections respectively corresponding to equal rope lengths of the guy-ropes.

10. A mobile crane in accordance with claim 1, wherein a transducer is arranged at least at one ballast element from which a signal corresponding to the ballast can be transmitted to a receiver unit.

11. A mobile crane in accordance with claim 10, wherein the receiver unit is integrated in a region of a chassis of the mobile crane on which the at least one weight can be placed down.

12. A mobile crane in accordance with claim 10, wherein the receiver unit is integrated in a region of the crane boom at which the at least one weight can be suspended.

13. A mobile crane in accordance with claim 10, wherein the receiver unit is arranged in a portable unit from which the data can be transmitted to the control device.

14. A mobile crane in accordance with claim 1, wherein at least one respective transducer is arranged at stabilizer plates of the transducer, and wherein a corresponding receiver unit is arranged at a vehicle chassis.

15. A mobile crane in accordance with claim 14, wherein transducers are arranged at each support plate at pre-determined positions such that a position of the stabilizer plate can be unambiguously associated by the respective receiver unit.

16. A mobile crane in accordance with claim 15, wherein it can be measured at every stabilizer plate whether it is under load.

17. A mobile crane in accordance with claim 1, wherein transducers are arranged at setup elements at lattice elements of a derrick boom.

18. A mobile crane in accordance with claim 17, wherein receiver units are arranged at adjacent elements.

19. A mobile crane in accordance with claim 17, wherein connection elements of a bus system are arranged at pre-determined connection points of the setup elements.

20. A mobile crane in accordance with claim 17, wherein geometrical configuration of the crane can be determined with reference to setup condition data.

21. A mobile crane in accordance with claim 1, wherein said transducer is a mobile transducer that cooperates with said receiver unit, with the receiver unti arranged at a pre-determined position on the mobile crane in order to detect a safe position of an operator and to release pre-determined actions of the mobile crane.

22. A crane comprising a position detection device, the device comprising:

an inductively operating transponder configured to operate as a transducer;

a receiver unit configured to sense a position of said transducer;

a control device configured to control an actuator in dependence on a signal from said receiver unit, said signal indicative of said position; and

a databus operating as a signal transmission device configured to transmit the signal from said receiver unit to said control device.

23. The crane of claim 22, further comprising a telescopic boom which has a hinged section and at least one telescopic section which can be telescoped out of it, where said position is indicative of an amount of telescoping of said boom.