BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a schematic section illustration of a rope winch.
FIG. 2 is a detail section view of the rope winch according to FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The rope winch 1 illustrated in FIG. 1 has two bearing supports 3, 4 between which a rope drum 2 is arranged. The rope drum 2 is supported so as to be rotatable about drive axis 30. A rope 5 is wound onto the rope drum 2 and, upon rotation of the rope drum 2 about its drive axis 30, depending on the rotational direction, is wound onto or removed from the rope drum 2. The rope drum 2 is supported on the bearing support 3 by means of a bearing 7 that rests on a collar 32 of the bearing support 3 projecting into the rope drum 2. As shown in FIG. 2, a seal 19 is arranged on the side of the bearing 7 facing the bearing support 3. The interior 6 of the rope drum 2 is open in the direction toward the bearing support 4. A receiving cup 11 is formed on the bearing support 4 and projects into the interior 6 of the rope drum 2. At its outer circumference a bearing 8 is arranged on which the other end of the rope drum 2 is supported.
A drive motor 9 is arranged in the receiving cup 11 and drives in rotation the drive shaft 10. The receiving cup 11 is closed off partially by a plate 29. The drive motor 9 is connected by screws to the plate 29. The plate 29 has a central opening through which the drive shaft 10 projects.
The drive motor 9 drives the rope drum 2 by means of gear 12 that is configured as a planetary gear. The sun wheel 13 of the planetary gear is fixedly connected to the drive shaft 10 for common rotation. The sun wheel 13 drives the planet wheels 14; two of the planet wheels 14 are shown in FIG. 2. For example, four planet wheels 14 can be provided. The planet wheels 14 are fixedly arranged about the drive axis 32 relative to the bearing support 3. For this purpose, the planet wheels 14 are rotatably supported on bearing axles 15. The bearing axles 15 are secured on the planet support 16 that is fixedly connected to the bolt 18 such that planet support 16 and bolt 18 cannot rotate relative to one another. The bolt 18 is fixedly connected to the bearing support 3 so that it cannot rotate relative to the bearing support 3. The planet support 16 is thus also fixedly connected to the bearing support 3 so that it cannot rotate relative to the bearing support 3. The rope drum 2 has at its circumference in the area of the planet wheels 14 a toothing 17 and the planet wheels 14 mesh with the toothing 17. The rotation of the sun wheel 13 causes the planet wheels 14 to rotate about the bearing axle 15, respectively. Since the bearing axles 15 are stationarily arranged, the rotation of the planet wheels 14 drives in rotation the rope drum 2.
In FIG. 2, the design of the bolt 18 is shown in more detail. The bolt 18 has at its end projecting into the interior 6 of the rope drum 2 a toothing 20 that interacts with the inner toothing 22 of the planet support 16. By means of the toothings 20 and 22, the bolt 18 and the planet support 16 are fixedly connected to one another so as not to rotate relative to one another.
For a fixed connection to the bearing support 3, the bolt 18 has in the area of the collar 32 a toothing 21 that interacts with a matching toothing of the bearing support 3. Between the toothings 20 and 21, the bolt 18 has a circumferential groove 24. The bottom of the circumferential groove 24 provides the smallest cross-section of the bolt 18. At the bottom of the groove 24 there are four wire strain gauges 25 that are schematically shown in FIG. 2. Two of the wire strain gauges are positioned at an angle of 90 degrees relative to one another. The two pairs of wire strain gauges are arranged on the circumference of the bolt 18 opposite one another in the circumferential groove 24. The bolt 18 has a passage 28 that, in the illustrated embodiment, is comprised of a longitudinal bore and a transverse bore in the bolt 18; these bores connect the circumferential groove 24 with the end of the bolt 18 projecting from the rope winch 1. Through the passage 28 a connecting line 26 of the wire strain gauges 25 is guided. The connecting line 26 connects the wire strain gauges 25 to a control 27 that is arranged outside of the rope winch 1.
The outwardly projecting end of the bolt 18 has a larger diameter resting against the shoulder 33 of the bearing support 3. In the area of the outwardly projecting end of the bolt 18, securing means in the form of a securing ring 23 are arranged that secure the bolt 18 in the direction of the drive axis 30. The diameter of the bolt 18 is greatest in the area of its outwardly projecting end. In the area of the toothing 21 the diameter is somewhat smaller and becomes even smaller in the area of the toothing 20. In this way, the bolt 18 can be pulled out of the rope winch 1 from the exterior side 31 of the bearing support 3 facing away from the rope drum 2 after the securing ring 23 has been removed. The securing ring 23 is accessible from the exterior so that dismounting of the bolt 18 is possible in a simple way.
It is also possible to provide other sensors for detecting load. The toothings 20, 21, 22 are configured in particular as serrations. It is also possible to employ other kinds of toothings that allow to pull the bolt 18 out from the rope winch 1.
The specification incorporates by reference the entire disclosure of European priority document 06 018 165.8 having a filing date of 31 Aug. 2006.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
Patent Application
20080054237
