DE202008011359U1 - Winch, in particular hoist winch - Google Patents

Abstract

Winch, in particular hoist winch for a crane, for the multilayer winding and unwinding of a traction device, characterized in that a controlled Zugmittelführung is arranged near the winch, which is trackable during the winding and unwinding of the traction device in each winding position such that the traction means always is wound up or unwound approximately perpendicular to the surface of the winch.

Description

The The invention relates to a winch, in particular a hoist winch for a crane, for winding and unwinding a traction device, in particular a rope.

• 1. Jede Windung schließt sich direkt an die vorhergehende Windung an, dabei wird zwischen den Windenlagen ein zulässiger Abstand freigelassen. Um dies zu gewährleisten, wird auf der Oberfläche der Windentrommeln eine entsprechende Rillung vorgesehen, um dort die erste Lage definiert zu positionieren (so beispielsweise die Windentrommel mit der sogenannten „Lebus Rille”).
• 2. Die einzelnen Lagen sind vollständig gefüllt. Es erfolgt kein vorzeitiger Lagensprung.
• 3. Die Windungen sind ausreichend straff, so dass keine losen Wicklungen entstehen. Dadurch kann keine Oberwindung zwischen die darunter liegenden Windungen gezogen werden.

Among other things in the field of cranes, especially mobile cranes, winches are used with multi-layer winding, for example, to lift loads. The number of layers z. B. be 10. To ensure a good winding quality, several criteria must be met. These can be summarized as follows:

• 1. Each turn joins directly to the previous turn, thereby leaving a permissible distance between the turns of the wind. To ensure this, a corresponding grooving is provided on the surface of the wind drums in order to position the first layer defined there (for example, the winch drum with the so-called "Lebus groove").
• 2. The individual layers are completely filled. There is no premature transfer of the position.
• 3. The turns are sufficiently tight so that no loose windings occur. As a result, no upper winding between the underlying turns can be pulled.

Especially with the last point has already the DE 203 19 073 U1 busy, which ensures a good winding quality, especially during the so-called empty hook operation. Here, suitable means were provided by which the cable when winding the rope on the winch is risigerbar.

Also the DE 20 2005 016 330 U1 deals with this aspect of tightly winding a steel rope. Here, a magnet system is provided, which is arranged such that a magnetic field can be generated whose magnetic flux is deflected by a movement of the steel cable to the extent that the steel cable is braked. As a result, a uniform winding of the steel cable is to be made possible on the cable drum.

According to the DE 20 2004 017 990 U1 a crane is proposed with a winch, by which the cable during winding of the rope is increased by the fact that the rope is guided before rolling up on the winch by two rollers having a freewheel in the direction of lowering the rope, while in the direction the lifting of the rope are braked via associated braking means. As a result, the necessary bias is applied to wind the rope taut on the drum of the winds.

The previously listed problem of winding quality of course, not only for winches in use as hoisting winch of a crane but altogether in winches.

task The present invention is therefore a generic Develop winds so that the winding quality of the secured to the winch load means, in particular rope, ensured can be.

According to the invention this object by a winch with the features of claim 1 solved. Accordingly, a winch for winding and unwinding a traction means associated with it Zugmittelführung on, during the winding and unwinding of the traction means is traceable so that the traction means always approximate up or unwound perpendicular to the surface of the winch.

about This guide can lateral rope forces be included, without the presence of leadership to a diagonal pull and thus an uneven Wind the traction device on the drum of the winch could.

preferred Embodiments of the invention will become apparent from the main claim subsequent dependent claims.

Therefore the Zugmittelführung can advantageously from two opposite Rolls can be formed leaving a gap, the gap width largely corresponds to the diameter of the traction device.

Of Further, the Zugmittelführung on a sliding over the width of the winch be slidably guided. Advantageous In this case, the displacement unit of the traction mechanism guide is forcibly guided. This forced guidance can according to a further particularly advantageous embodiment of the invention due a rotary encoder signal of a winch rotation receiving rotary encoder be controllable.

The control of the current position and the number of winding in the position of the on or unwound can, for example, already in accordance with the DE 196 04 428 C2 and the DE 199 56 265 B4 be determined. By means of this information, the traction mechanism can now be tracked by a control loop so that the traction means can always be approximately perpendicular to the surface of the winch or from the underlying wind position off or absorbed. This ensures an excellent winding quality, as here any diagonal pull is reliably prevented.

As a drive of the forced operation can serve a piston-cylinder unit with lever. It can the actual position of the lever are monitored and supplied to the controller so as to realize the feedback in the regulation of Zugmittelführung.

Especially Advantageously, a winch with the aforementioned features in a Crane, preferably a vehicle crane used. There lets These winds with particular advantage as guy winch at the free Install end of a guy support.

there can be opposite to the winch on the guy support Be arranged bearing points for receiving the displacement unit.

The Bearing points can advantageously have stops, limited by the maximum travel of the displacement unit is.

Advantageous can in the tension of the bracing the displacement unit of Zugmittelführung be unlockable. Is a guy fully taut, can such strong side forces occur that these are no longer taken up by the leadership unit could, inevitably, destroy the leadership unit could lead. These high forces occur when simply winding on the winch or from the winch in front of the full tension of the bracing just not on, so that the Guide unit on the usual winding or Unwinding of the traction device on the winch or designed by the winds is.

At the guy support is spaced from the Zugmittelführung Advantageously, another deflection roller for guiding the Traction means arranged, as far as the guy support extreme Positions during the bracing occupies. This can do that Traction means advantageously guided over a longer range before being wound up on the winds.

Further Features, details and advantages of the invention will become apparent an embodiment shown in the drawing. Show it:

1 : the end portion of a guy support of a mobile crane, in which a winch for receiving a guy rope is arranged and

2 - 4 : Details of the illustrations according to 1 ,

In 1 is the tail 10 represented a not shown here bracing support of a mobile crane. In this tail 10 is a winch 12 taken up for winding and unwinding of a guy rope not shown here. Near the winch is a Zugmittelführung 14 arranged.

In particular from the 2 is the structure of the Zugmittelführung 14 to see. This consists essentially of two rollers 16 , which are arranged parallel to each other and between them a gap 18 define, which corresponds substantially to the diameter of the rope. The two rollers 16 are in a displacement unit 20 stored, which consists essentially of a rectangular frame, the rollers 16 includes. This frame 20 is in storage 22 and 24 (see. 3 . 4 ) slidably guided. Here is the displacement unit 20 stored on them so that they cover the entire width of the winds 12 is displaceable. The bearings 22 . 24 have attacks 26 . 28 on that the way of the displacement unit 20 limit.

The displacement unit is a from a piston-cylinder arrangement 30 existing drive, moving on a movable with the displacement unit 20 connected lever 32 acts. The drive shifts the displacement unit 20 according to a control signal. This is done via a rotary encoder 34 at the winch the actual position has been taken off. This signal becomes a desired position for the displacement unit 20 given and by the drive 30 . 32 set. The position of the powered lever 32 is again as an actual position by another encoder 34 supervised. The corresponding data are then fed to the control, so that an exact cable guide, which ensures an approximately vertical feeding of the cable to the winch, can take place. When using a winch, in which the so-called "Lebus groove" is provided, the control of the displacement unit can be simplified, since the rope is always unwound from areas of the winds in which the rope is guided parallel to the side wall of the winch disc. Here, the Zugmittelführung must be moved according to the Leberechtigung.

The Zugmittelführung is designed such that the cable is guided during winding to or from the winch. Here, only small forces are present in the rope. Now, if the rope is fully stretched in the case of a guy, the Zugmittelführung will not be able to absorb the lateral forces. There is therefore the danger that the guide unit is destroyed. Therefore, the drive for the Zugmittelführung is released when the winch 12 is blocked under load. For this purpose, a pawl is pivoted into the outer toothing of the winch and sets it. Through the activation of the Zugmittelführung 14 The rope can deflect the Zugmittelführung. Since there is no winding or unwinding of the rope, but this is for the winding quality without further concern.

In the embodiment shown here is another cylindrical roller 40 provided that a guide of the pull rope over a longer Be empowered to even extreme positions of the guy supports 10 to admit, without having to accept a negative effect on the winding quality.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 20319073 U1 [0003]
• - DE 202005016330 U1 [0004]
• - DE 202004017990 U1 [0005]
• - DE 19604428 C2 [0013]
• - DE 19956265 B4 [0013]

Claims (15)

Winch, in particular hoist winch for a crane, for multi-layer winding and unwinding of a traction device, characterized in that a controlled Zugmittelführung is arranged near the winch, which is trackable during the winding and unwinding of the traction device in each winding position such that the traction means always is wound up or unwound approximately perpendicular to the surface of the winch. Winch according to claim 1, characterized in that the Zugmittelführung from two opposite Rolling is formed leaving a gap, wherein the Slit width largely corresponds to the diameter of the traction device. Winch according to claim 1 or 2, characterized that the Zugmittelführung on a sliding over the width of the winch is guided displaceably. Winch according to claim 3, characterized in that forcibly guided the displacement unit of Zugmittelführung is. Winch according to claim 4, characterized in that the forced operation due to a rotary encoder signal of a the winch rotation receiving rotary encoder is controllable. Winch according to claim 4 or 5, characterized that as a drive of the forced operation a piston-cylinder unit with lever serves. Winch according to claim 4 or 5, characterized that as a drive of the forced operation a linear actuator with a measuring system is used. Winch according to claim 6 or 7, characterized that the actual position of the lever or linear drive can be monitored and the controller can be fed, so as to control the To realize Zugmittelführung. Crane, preferably vehicle crane, with a winch according to one of claims 1 to 8. Crane according to claim 9, characterized in that the winch is attached to a guy support as a guy winch is. Crane according to claim 9, characterized in that the winch as guy winch at the end, especially free end, one Bracing support is attached. Crane according to one of the preceding claims, characterized in that opposite to the winch on the guy support bearings for receiving the displacement unit are arranged. Crane according to claim 12, characterized in that the bearings have stops by which the maximum Travel of the displacement unit is limited. Crane according to one of the preceding claims, characterized in that at the tension of the bracing the Displacement unit of Zugmittelführung is unlocked. Crane according to one of the preceding claims, characterized in that spaced at the guy support from the Zugmittelführung yet another deflection roller is arranged to guide the traction means.