WINCH FOR A TENSION LINE

Abstract

A winch for winding and unwinding of a tension line, with a winding drum that is rotational around its central axis so that the tension line is windable and unwindable in windings running around the winding drum, and with a rotating actuator for driving a rotation of the winding drum, wherein the winding drum is arranged in a longitudinally movable manner along its central axis with respect to a base of the winch. It is a threaded rod extending in the central axis and having an external thread, wherein the winding drum is arranged rotationally around the threaded rod by means of a counter-thread that engages in the external thread.

Claims

1. A winch for winding and unwinding of a tension line, with a winding drum that is rotational around its central axis so that the tension line, is windable and unwindable in windings running around the winding drum, and with a rotating actuator for driving a rotation of the winding drum, wherein the winding drum is arranged in a longitudinally movable manner along its central axis with respect to a base of the winch, wherein a threaded rod extending in the central axis and having an external thread is provided, and wherein the winding drum is arranged rotationally around the threaded rod by means of a counter-thread that engages in the external thread.

2. The winch according to claim 1, wherein the rotating actuator has at least one driving shaft extending parallel to the central axis and arranged eccentrically with respect to the central axis.

3. The winch according to claim 2, wherein the rotating actuator includes a rotationally drivable actuator base part with a pivot bearing, in which one end of the threaded rod is supported rotationally.

4. The winch according to claim 3, wherein at least one driving shaft on the actuator base part is arranged offset with respect to the pivot bearing.

5. The winch according to claim 4, wherein one end of the threaded rod is fixed in a non-rotational manner at the base of the winch.

6. The winch according to claim 2, wherein the winding drum includes a bearing, in which the at least one driving shaft is supported in a longitudinally displaceable manner.

7. The winch according to claim 6, wherein the winding drum includes a carrier part with a central duct for the threaded rod, wherein the carrier part has a drive section at an offset position with respect to the central duct and operated by the rotating actuator for driving the winding drum.

8. The winch according to claim 7, wherein the central duct includes an internal thread forming the counter-thread.

9. The winch according to claim 8, wherein the external thread is formed as cross-threading having two counter-rotating thread profiles.

10. The winch according to claim 9, wherein the pitch of the external thread and/or of the counter-thread corresponds to a preset spacing of the windings.

Description

[0022] In the following the invention is further explained by means of the figures showing:

[0023] FIG. 1: External perspective view of an inventive winch;

[0024] FIG. 2: Longitudinal cross section for explanation of the winch according to FIG. 1;

[0025] FIG. 3: Exploded view for explanation of the winch according to FIGS. 1 and 2.

[0026] The following description as well as the figures use the same reference numerals for identical or mutually corresponding features.

[0027] The FIGS. 1-3 show a winch 10 for winding and unwinding of a tension line 12 (here: a cable) schematically represented in the longitudinal cross section of FIG. 2. The winding drum 10 comprises a rotary drive 14 (for example electric motor) optionally connected to a rotating actuator 20 via further units (for example braking device 16 and/or gearing 18).

[0028] The rotating actuator 20 is arranged to drive a winding drum 22 for rotation around its central axis A. The winding drum 22 has a cylindrical, external winding surface 24 that can have at least one helically surrounding surface groove 26 (see FIG. 2).

[0029] A threaded rod 28 having an external thread 30 (see FIG. 3) extends along the central axis A.

[0030] The winding drum 22 comprises a carrier part 32 with a central duct 34 through which the threaded rod 28 runs. The central duct 34 has a counter-thread 36 running on the external thread 30 of the threaded rod 28. The counter-thread 36 can be formed e.g. by an internal thread 37 of a threaded sleeve 38 fitted e.g. into the carrier part 32. Basically, the winding drum 22 can be composed of several parts and e.g. can be screwed to a final flanged disk 39.

[0031] The carrier part 32 has a drive section (at reference numeral 50) arranged eccentrically with respect to the central duct 34 (i.e. radially offset with respect to the central axis A) and operated by the rotating actuator 20 for rotational driving of the winding drum 22.

[0032] The rotating actuator 20 can comprise e.g. two driving shafts 40 symmetrically arranged at an actuator base part 42 with respect to the central axis and fixed e.g. by means of a locking pin 44.

[0033] The actuator base part 42 has a central pivot bearing 46, where the threaded rod 28 is rotationally supported. For example, the pivot bearing 46 is designed as ball bearing and can be secured with a locking ring 48.

[0034] The driving shafts 40 extend through the corresponding ducts in the drive section of the carrier part 32 and can be displaced there longitudinally in bearings 50 and, preferably, are supported rotationally.

[0035] The end of the threaded by 28 opposite to the pivot bearing 46 is fixed in a base 52 of the winch 10. The base can be provided by a fastening flange for external fixing of the winch. The ends of the driving shaft 40 opposite to the actuator base part 42 are housed in a base disk 54 and are locked e.g. by means of pins 56. In turn, the base disk 54 has a central pivot bearing 58 (e.g. ball bearing) through which the threaded rod 28 runs so that rotation around such rod is possible. The threaded rod 28 can be rotation-locked by means of a feather key 60 (e.g. with disk 62 and screw 64) in the base 52. The position of the threaded rod 28 along the central axis A can be set by removing and, if applicable, replacing the feather key 60.