Winch

Abstract

The present invention relates to a winch, in particular a luffing winch, with a winch drum, at least one main drive driving the transmission input shaft, and at least one emergency drive driving the transmission input shaft in case of emergency, wherein at least one emergency drive can be coupled to the driven wheel of the transmission input shaft as required via at least one intermediate gear. The present invention furthermore is directed to a construction machine or a lifting device with at least one such winch.

Claims

1. A winch, comprising: a winch drum arranged on a drum shaft; at least one main drive driving the drum shaft, the main drive arranged coaxially with the winch drum on the drum shaft; and at least one emergency drive driving the drum shaft in case of emergency, the emergency drive comprising a drive wheel, wherein at least one emergency drive is coupleable to a driven wheel of the drum shaft as required via at least one intermediate gear, the intermediate gear in constant engagement with the emergency drive, via the drive wheel, independent of a current position of the intermediate gear and shiftably mounted for coupling in and out in a direction of its shaft axis, the driven wheel arranged on the drum shaft between the winch drum and the main drive.

2. The winch according to claim 1, wherein the at least one intermediate gear is coupleable in or out in the direction of its shaft axis via a lever mechanism.

3. The winch according to claim 1, wherein the at least one intermediate gear is fixed in its position by at least one locking bolt.

4. The winch according to claim 1, wherein a winch brake is arranged coaxially with the main drive and the winch drum on the drum shaft.

5. The winch according to claim 1, wherein toothing of the at least one intermediate gear and/or of the driven wheel is designed as roof-like toothing.

6. The winch according to claim 1, wherein the drive wheel includes at least one hexagon.

7. The winch according to claim 1, further comprising at least one position detector of the intermediate gear.

8. The winch according to claim 1, further comprising one or more slotted spacer bushes for decoupling the main drive.

9. The winch according to claim 1, wherein the winch is a luffing winch of a construction machine.

10. A winch, comprising: a winch drum arranged on a drum shaft; at least one main drive driving the drum shaft, the main drive arranged coaxially with the winch drum on the drum shaft; and at least one emergency drive driving the drum shaft in case of emergency, wherein at least one emergency drive is coupleable to a driven wheel of the drum shaft via at least one intermediate gear, the intermediate gear shiftably mounted for coupling in and out in a direction of its shaft axis, the driven wheel arranged on the drum shaft between the winch drum and the main drive; wherein, when the emergency drive drives the drum shaft, the intermediate gear is shifted along its shaft axis via actuation of a lever mechanism until it engages in the driven wheel, and wherein, when the main drive drives the drum shaft and the emergency drive is shut off, the intermediate gear is not in engagement with the driven wheel.

11. The winch according to claim 10, wherein the intermediate gear is in constant engagement with a drive wheel of the emergency drive independent of a current position of the intermediate gear.

12. The winch according to claim 10, wherein the lever mechanism is connected with an oblong intermediate gear receptacle which extends in the direction of the shaft axis of the intermediate gear, and wherein, upon actuation of the lever mechanism, the receptacle shifts the intermediate gear in the direction of its shaft axis to bring it into engagement with the driven wheel.

13. The winch according to claim 10 further comprising a braking device, the braking device comprising a braking disc arranged coaxially with the main drive and the winch drum on the drum shaft.

14. The winch according to claim 13, wherein engagement of the braking device generates a braking moment acting on the winch drum.

15. The winch according to claim 10, wherein the emergency drive is arranged laterally offset from the drum shaft, and wherein the drum shaft and a drive shaft of the emergency drive extend parallel to each other.

16. The winch according to claim 11, wherein the drive wheel of the emergency drive is arranged at an end of a shaft of the emergency drive.

17. The winch according to claim 1 further comprising a braking device, the braking device comprising a braking disc arranged coaxially with the main drive and the winch drum on the drum shaft.

18. The winch according to claim 11, wherein engagement of the braking device generates a braking moment acting on the winch drum.

19. The winch according to claim 6, wherein the intermediate gear is in constant engagement with the drive wheel independent of a current position of the intermediate gear, and wherein the drive wheel is arranged at an end of a shaft of the emergency drive.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) FIG. 1 shows a side view of the luffing winch according to the invention.

(2) FIG. 2 shows a sectional representation along the sectional axis A-A of the luffing winch according to the invention as shown in FIG. 1.

(3) FIG. 3 shows a further sectional representation of the luffing winch according to the invention along the sectional axis A-A of FIG. 1.

(4) FIG. 4 shows a detail view of the lever mechanism of the luffing winch according to the invention.

DETAILED DESCRIPTION

(5) FIG. 1 shows an overall view of the luffing winch according to the invention in a side representation. The luffing winch according to the invention was designed as compact winch with a planetary transmission not shown in detail. The main drive 10 as well as the brake disk 60 of the braking device 40, the planetary transmission and the winch drum 30 are arranged coaxially to each other. On the drum winch 30 the winch cable 31 is wound up in the usual way. In case of need, i.e. upon occurrence of a technical defect of the main drive 10, the emergency drive 20 can be activated for safety. For the emergency operation, the same can be coupled to the drive train of the winch drum 30 by means of the lever mechanism 110. The luffing winch is constructed such that the emergency drive 20 will only be running when necessary, i.e. in the emergency operation. When the main drive 10 is blocked mechanically, it can additionally be disengaged by means of certain means and the flux of force to the drive train of the luffing winch will be interrupted.

(6) The braking device 40 has the advantage that due to the special arrangement the brake is usable for both modes, namely the normal hoisting operation and the emergency operation, and thus no additional drive must be provided. In this embodiment, the braking device 40 furthermore has the advantage that it provides for load-free switching, since the transmission moment is applied to the brake, but not to the drives.

(7) The braking device 40 can be designed for example as multidisk brake, drum brake or as electromechanical vortex brake. A brake integrated into the transmission preferably can be designed as multidisk brake.

(8) The individual technical details of the luffing winch according to the invention will be explained in more detail below with reference to the two FIGS. 2 and 3. FIGS. 2 and 3 show a sectional representation of the luffing winch according to the invention along the sectional axis A-A of FIG. 1, wherein a top view of the luffing winch has been chosen. The main drive 10 is connected with the transmission input shaft 35 of the winch drum 30 via a planetary transmission. By means of the clutch means 50, the main drive 10 can be decoupled from the drive train of the winch drum 30 and the flux of force can be interrupted.

(9) Furthermore, the brake disk 60 of the braking device 40 is firmly arranged on the transmission input shaft, so that the engagement of the braking device 40 into the brake disk 60 generates a braking moment acting on the winch drum 30.

(10) The emergency drive 20 according to the invention is arranged laterally offset to the drive axle of the main drive 10, wherein the drive shafts of the main drive 10 and of the emergency drive 20 extend parallel to each other. At the end of the emergency drive shaft the drive wheel 80 is arranged. The same has at least twice the width of the intermediate gear 100. To generate a flux of force between the emergency drive 20 and the driven wheel 70, the intermediate gear 100 can be coupled in when necessary. By means of the intermediate gear 100, a flux of force from the drive wheel 80 of the emergency drive 20 to the driven wheel 70 of the transmission input shaft 35 can be effected. The corresponding driven wheel 70 for the emergency drive train is sitting on the transmission input shaft 35 before the drum 30.

(11) FIG. 2 shows the luffing winch according to the invention during the normal operation. In this case, the main drive 10 operates properly and drives the winch 30. The emergency drive 20 is shut off and the intermediate gear 100 is not in engagement with the driven wheel 70 of the transmission input shaft 35.

(12) To establish a flux of force from the emergency drive 20 to the transmission input shaft in case of emergency, the intermediate gear 100 is movably mounted in direction of its shaft axis. The gear wheel dimension of intermediate gear 100 and drive wheel 80 is chosen such that a constant engagement of the intermediate gear 100 into the drive wheel 80 is ensured independent of the current intermediate gear position.

(13) When the winch operation should be switched over to the emergency drive 20, the lever mechanism 110 must be actuated by the user. As can be taken from FIG. 3, due to the lever actuation the intermediate gear 100 is shifted to the right in direction of its shaft axis relative to the transmission input shaft 35, until the intermediate gear 100 engages in the driven wheel 70 of the drum 30. The coordinated roof-like toothing of intermediate gear 100 and driven wheel 70 provides for a particularly smooth engagement of the two wheels, so that the application of force required for this purpose is limited. The lever mechanism 110 also can be mounted axially and can be actuated hydraulically, electromechanically or pneumatically.

(14) Since in case of a defect of the main drive 10 a possible blockage of the drive shaft of the main drive 10 cannot be excluded, the main drive 10 preferably can be decoupled from the drive train of the luffing winch. For this purpose, the main drive 10 is disengaged from the transmission input shaft 35 of the drum 30 via slotted spacer bushes 120. Accordingly, the clutch mechanism 50 no longer is in engagement, so that the flux of force from the main drive 10 to the transmission input shaft is interrupted. The adjustment of the main drive 10 is effected via the screws 170.

(15) FIG. 4 shows a detail representation of the lever mechanism according to the invention for longitudinally shifting the intermediate gear 100. In the foreground, FIG. 4 shows the drive wheel 80 of the emergency drive 20. In parallel offset to the drive wheel 80 of the emergency drive 20, i.e. into the drawing plane, the intermediate gear 100 is concealed. The lever 110 is connected with the oblong intermediate gear receptacle 130, which extends in direction of the intermediate gear shaft axis. When the lever 110 is guided to the upper right through the recess 140 extending upwards at an angle, the intermediate gear 100 is shifted to the right via the receptacle 130 in direction of its shaft axis and brought in engagement with the driven wheel 70. The lever feedback effects the longitudinal displacement of the intermediate gear 100 to the left, whereby the flux of force between intermediate gear 100 and driven wheel 70 is interrupted.

(16) The locking bolt 150, which inhibits the longitudinal displacement of the intermediate gear receptacle 130 in any direction, serves for fixing the intermediate gear position. In the region of the intermediate gear 100, one or more incremental encoders 160 furthermore are arranged for detecting the position of the intermediate gear 100. The current position of the intermediate gear 100 is monitored and communicated to the winch controller by the incremental encoders.

(17) The emergency drive can also be brought in engagement with the shaft via an angular transmission. In addition, both drives can also be of the hydraulic type.