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EP0360033A1 - Cable traction device - Google Patents

Cable traction device Download PDF

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Publication number
EP0360033A1
EP0360033A1 EP89115800A EP89115800A EP0360033A1 EP 0360033 A1 EP0360033 A1 EP 0360033A1 EP 89115800 A EP89115800 A EP 89115800A EP 89115800 A EP89115800 A EP 89115800A EP 0360033 A1 EP0360033 A1 EP 0360033A1
Authority
EP
European Patent Office
Prior art keywords
pressure
pieces
chain
cable
rope
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89115800A
Other languages
German (de)
French (fr)
Other versions
EP0360033B1 (en
Inventor
Manfred Harig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Greifzug Hebezeugbau GmbH
Original Assignee
Greifzug Hebezeugbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Greifzug Hebezeugbau GmbH filed Critical Greifzug Hebezeugbau GmbH
Publication of EP0360033A1 publication Critical patent/EP0360033A1/en
Application granted granted Critical
Publication of EP0360033B1 publication Critical patent/EP0360033B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees

Definitions

  • the invention relates to a cable pulling device with a driven traction sheave and with a rope running through it, the load strand of which wraps around the traction sheave and at the end of the wrapping of at least one pressure element via thrust pieces which are arranged in the links of an endless chain rotating around a guide element, into the cable groove the traction sheave is pressed.
  • a cable pulling device of this type is known (DE-AS 22 01 548), in which the pressure element is formed by three rollers mounted on a vibrating beam, which presses on the inside of the links, which is designed as a rolling surface, of an endless chain which rotates around a guide ramp and which press the rope into the rope groove of the traction sheave.
  • the pins of the chain carry chain rollers on the outer sides of the chain links, which engage with notches in the drive pulley and ensure that the chain is carried along by the drive pulley and that roll on the guide ramp.
  • the noise caused by the chain running around the guide ramp is very large, since the tension of the chain is reduced when it is pressed onto the rope, and the movement play between the guide ramp and chain that is caused thereby leads to rattling.
  • Another known embodiment of a cable drive uses an endless pressure chain with chain links, which have pressure pieces that the rope in the rope groove Press the rope pulley (BE-PS 827 486).
  • the pressure is generated by means of three pressure rollers, which are seated in a chain housing that can be positioned radially against the sheave.
  • the chain is returned via two pulleys.
  • each chain element designed as a pressure piece always executes a tilting movement as soon as it runs in or out under one of the pressure rollers. This results in line contact between the chain link and rope instead of a uniform, full-surface contact pressure, which results in uneven pressure and high rope wear.
  • the object of the invention is to provide a cable pulling device of the type described in more detail in the introduction, in which the frictional connection between the cable and the traction sheave permits a very high load without the high pressure of the pressure element required for this plastically deforming the outer wires of the cable.
  • the guide element is designed as a pressure element and has at least one running surface parallel to the base of the cable groove, on which pressure rollers roll, which are rotatably mounted in the chain on the pressure pieces.
  • This arrangement has the advantage that the pressure pieces do not perform any pivoting movements under contact pressure, since this only occurs when the pressure piece lies fully on the rope. Due to the constant pressure surface, the permissible pressure on the rope edge fibers is not exceeded even under high loads. So that there is always optimal contact between the pressure piece and the rope, even with a non-uniform course of the rope, it is expedient for the pressure element to be tiltably mounted.
  • each pressure piece has at least two pressure rollers arranged at a distance from one another in the longitudinal direction of the chain.
  • the pressure rollers In order to keep the overall height of the pressure element low, it is expedient for the pressure rollers to be arranged in the longitudinal center plane of the pressure pieces. With particularly high contact forces or with a narrow width of the pressure pieces determined by the rope shape, it is possible to arrange the pressure rollers on both outer sides of the pressure pieces. For special applications it can be useful to combine the different pressure roller arrangements.
  • the pressure rollers are designed as roller bearings with a reinforced outer ring, it is ensured that the high radial contact forces are reliably transmitted to the pressure pieces; The rolling elements are protected against abrasion and dust when installing closed bearings.
  • the length of the running surface of the pressure element parallel to the base of the cable groove is at least as long as the distance which two pressure pieces in succession in the chain take up. The longer the parallel part of the tread, the more pressure pieces can transmit the contact pressure and the lower the surface pressure on the rope edge fibers.
  • the chain can also be designed so that successive thrust pieces are connected to one another by link plates which are mounted on the bolts of the pressure rollers.
  • 10 denotes a cable pulling device with a continuous pulling cable 11, which is preferably designed as a steel cable and on the load strand 12 of which the load to be moved hangs, whereas the lost drum 13 is loaded only by its own weight.
  • the load strand 12 of the rope 11 runs tangentially into the rope groove 16 of a traction sheave 15 rotatably mounted in the housing 14, wraps around it and is guided tangentially out of the housing 14 again as a lost drum 13.
  • the drive of the traction sheave 15 is not the subject of the invention and is therefore not shown.
  • the traction sheave 15 has a semicircular cable groove 16 which is adapted to the profile of the cable 11.
  • the cable groove 16 can also be designed as a wedge groove, as is the case in FIG. 5 is shown.
  • the rope 11 is pressed at the end of its looping path by a pressure device 17 into the rope groove 16 of the traction sheave 15.
  • the pressure device 17 consists of a kidney-shaped pressure element 19 which is tiltably mounted on a spring-loaded lever 18 and on the running surface 20 of which pressure rollers 21 roll.
  • the pressure rollers 21 are mounted on the pin 25 of an articulated chain 22, the chain links of which are alternately mounted on the pin 25 by pressure pieces 24 and on their outer sides 33 stored tabs 26 are formed.
  • the running surface 20 of the pressure element 19 runs on its part facing the traction sheave 15 over the length L parallel to the cable groove 16 of the traction sheave 15 and is delimited on each side by a guide web 27 in order to prevent the chain 22 from slipping off the running surface 20 and to give the pressure rollers 21 lateral guidance.
  • the pressure pieces 24 are circularly adapted on their side of the traction sheave 15 facing the cable 11 and, as shown in FIGS. 3 and 5, have a profiling 28 which is adapted to the outer diameter of the cable 11.
  • This profile design has the advantage that the contact pressure is evenly distributed on the rope 11, which leads to a reduction in the wear of the rope 11.
  • the pressure pieces 24 are provided on the side facing the pressure element 19 in the running direction of the chain 22 with a groove 29 and at the front and rear end with a transverse bore which serve to receive bolts 25 which are also axes of the pressure rollers 21.
  • the pressure rollers 21 are designed as roller bearings with a reinforced outer ring in order to be able to transmit large pressure forces. Closed bearings are used to protect against foreign body entry.
  • the pressure element 19 has a length L which is at least as long as the distance S which two pressure pieces 24 consecutive in the chain occupy.
  • An embodiment is particularly expedient in which the length L of the running surface of the pressure element is three times as great as the distance S which two successive pressure pieces take up. The rope is then pressed into the groove over a large length. However, this embodiment is not shown in the drawing. Due to the geometric design of the pressure element 19, a pivoting movement of the pressure pieces 24 under the contact pressure is prevented and line contacts between pressure piece 24 and rope 11 are avoided, which result in high rope wear.
  • FIG. 4 A further possible arrangement of the pressure rollers 21 on the pressure piece 24 is shown in FIG. 4.
  • two pressure rollers 21 are overhung on the outside 33 of the pressure piece 24 on each pin 25, which roll on running surfaces 20 of the pressure element 19 and from one in the middle of the treads 20 arranged guide web 27 are guided. This reduces the surface pressure between the pin 25 and the pressure piece 24.
  • the traction sheave 15 rotates, the rope 11 and the chain 22 are taken along by frictional engagement at the same angular velocity.
  • the frictional engagement can be converted into frictional engagement if a type of sprocket with the pitch of the chain 22 is attached to the drive pulley 15. In this case, it is sufficient if a chain wheel is attached to only one side of the chain, in which the bolts 25 engage only at one end.
  • the chain 22 itself is not subjected to any tensile load and therefore runs largely wear-free on the running surface 20 around the pressure element 19.
  • the invention is not limited to the illustrated and described embodiment, but several changes and additions are possible without leaving the scope of the invention.
  • a knitted synthetic fiber belt as a traction device, which has a large, load-distributing support on a flat, rubberized traction sheave and could use favorable coefficients of friction.
  • the pressure pieces can also be provided with at least one pressure roller in the middle. It is only essential that there is no pivoting movement of the pressure pieces under contact pressure.
  • the pressure element 19 can also be adjusted depending on the load.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Cable Installation (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Pulleys (AREA)
  • Flexible Shafts (AREA)

Abstract

A cable traction device having a driven driving disc (15) and having a traction cable (11) passing through, the load strand of which loops around the driving disc (15) and is pressed into the cable groove (16) at the end of the looping by a pressure device (17). In order for it to be possible to transfer a high drive force onto the cable but not to allow the pressure acting on the cable to rise too high, the pressure device (17) consists of a kidney-shaped contact- pressure element (19) about which a link chain (22) with pressure pieces (24) circulates, on which pieces pressure rollers (21) are mounted which roll off on a running surface (20) which runs parallel to the cable-groove base and of which at least two pressure pieces (24) always bear with their whole surface on the cable (11). <IMAGE>

Description

Die Erfindung betrifft eine Seilzugvorrichtung mit einer angetriebenen Treibscheibe und mit einem durchlaufenden Seil, dessen Lasttrum die Treibscheibe umschlingt und am Ende der Umschlingung von mindestens einem Andruckelement über Druckstücke, die in den Gliedern einer um ein Führungs­element umlaufenden, endlosen Kette angeordnet sind, in die Seilrille der Treibscheibe gedrückt wird.The invention relates to a cable pulling device with a driven traction sheave and with a rope running through it, the load strand of which wraps around the traction sheave and at the end of the wrapping of at least one pressure element via thrust pieces which are arranged in the links of an endless chain rotating around a guide element, into the cable groove the traction sheave is pressed.

Es ist eine Seilzugvorrichtung dieser Art bekannt (DE-AS 22 01 548), bei der das Andruckelement von drei auf einem Schwingbalken montierten Rollen gebildet wird, die auf die als Wälzfläche ausgeführte Innenseite der Glieder einer um eine Führungsrampe umlaufenden, endlosen Kette drückt, wel­che das Seil in die Seilrille der Treibscheibe pressen. Die Bolzen der Kette tragen an den Außenseiten der Kettenglie­der Kettenrollen, die mit Einkerbungen in der Treibscheibe im Eingriff sind und für die Mitnahme der Kette durch die Treibscheibe sorgen und die auf der Führungsrampe abrollen.A cable pulling device of this type is known (DE-AS 22 01 548), in which the pressure element is formed by three rollers mounted on a vibrating beam, which presses on the inside of the links, which is designed as a rolling surface, of an endless chain which rotates around a guide ramp and which press the rope into the rope groove of the traction sheave. The pins of the chain carry chain rollers on the outer sides of the chain links, which engage with notches in the drive pulley and ensure that the chain is carried along by the drive pulley and that roll on the guide ramp.

Bei der beschriebenen Vorrichtung ist die Geräuschentwick­lung durch das Umlaufen der Kette über die Führungsrampe sehr groß, da sich die Spannung der Kette beim Andruck auf das Seil verringert und das dadurch vorhandene Bewegungs­spiel zwischen Führungsrampe und Kette zum Klappern führt.In the described device, the noise caused by the chain running around the guide ramp is very large, since the tension of the chain is reduced when it is pressed onto the rope, and the movement play between the guide ramp and chain that is caused thereby leads to rattling.

Eine andere bekannte Ausführungsart eines Seiltriebes ver­wendet eine endlose Druckkette mit Kettengliedern, welche Druckstücke aufweisen, die das Seil in die Seilrille der Seilscheibe drücken (BE-PS 827 486). Der Andruck wird hier­bei mittels dreier Druckrollen erzeugt, die in einem Ketten­gehäuse sitzen, das radial gegen die Seilscheibe angestellt werden kann. Die Rückführung der Kette erfolgt über zwei Umlenkrollen.Another known embodiment of a cable drive uses an endless pressure chain with chain links, which have pressure pieces that the rope in the rope groove Press the rope pulley (BE-PS 827 486). The pressure is generated by means of three pressure rollers, which are seated in a chain housing that can be positioned radially against the sheave. The chain is returned via two pulleys.

Bei dieser Ausführungsform führt jedes als Druckstück ausge­führte Kettenelement immer dann eine Kippbewegung aus, so­bald es unter einer der Druckrollen ein- oder ausläuft. Da­durch kommt es anstatt eines gleichmäßigen, vollflächigen Anpreßdruckes zu Linienberührungen zwischen Kettenglied und Seil, was einen ungleichmäßigen Andruck und hohen Seil­verschleiß zur Folge hat.In this embodiment, each chain element designed as a pressure piece always executes a tilting movement as soon as it runs in or out under one of the pressure rollers. This results in line contact between the chain link and rope instead of a uniform, full-surface contact pressure, which results in uneven pressure and high rope wear.

Aufgabe der Erfindung ist es, eine Seilzugvorrichtung der eingangs näher beschriebenen Art zu schaffen, bei der der Reibschluß zwischen Seil und Treibscheibe eine sehr hohe Last zuläßt, ohne daß der dazu notwendige hohe Druck des Andruckelementes die äußeren Drähte des Seiles plastisch verformt.The object of the invention is to provide a cable pulling device of the type described in more detail in the introduction, in which the frictional connection between the cable and the traction sheave permits a very high load without the high pressure of the pressure element required for this plastically deforming the outer wires of the cable.

Diese Aufgabe wird mit der Erfindung dadurch gelöst, daß das Führungselement als Andruckelement ausgebildet ist und mindestens eine zum Seilrillengrund parallele Lauffläche aufweist, auf der sich Druckrollen abwälzen, die in der Kette an den Druckstücken drehbar gelagert sind.This object is achieved with the invention in that the guide element is designed as a pressure element and has at least one running surface parallel to the base of the cable groove, on which pressure rollers roll, which are rotatably mounted in the chain on the pressure pieces.

Diese Anordnung hat den Vorteil, daß die Druckstücke keine Schwenkbewegungen unter Anpreßdruck ausführen, da dieser erst auftritt, wenn das Druckstück voll auf dem Seil auf­liegt. Durch die konstant bleibende Andruckfläche wird die zulässige Pressung auf die Seilrandfasern auch bei hoher Last nicht überschritten. Damit auch bei ungleichförmigem Seilverlauf immer optimaler Kontakt zwischen Druckstück und Seil besteht, ist es zweckmäßig, daß das Andruckelement kippbar gelagert ist.This arrangement has the advantage that the pressure pieces do not perform any pivoting movements under contact pressure, since this only occurs when the pressure piece lies fully on the rope. Due to the constant pressure surface, the permissible pressure on the rope edge fibers is not exceeded even under high loads. So that there is always optimal contact between the pressure piece and the rope, even with a non-uniform course of the rope, it is expedient for the pressure element to be tiltably mounted.

Um eine möglichst große Anpreßfläche ausnutzen zu können, ist es zweckmäßig, die Druckstücke in jedem zweiten Ketten­glied anzuordnen. Dadurch ist auch eine gegenseitige Beein­flussung der Druckstücke ausgeschlossen, so daß ihr Andruck­verhalten ausschließlich von dem Verlauf der Laufbahn des Andruckelementes bestimmt ist.In order to be able to utilize the largest possible contact surface, it is expedient to arrange the pressure pieces in every second chain link. This also prevents mutual interference between the pressure pieces, so that their pressure behavior is determined exclusively by the course of the track of the pressure element.

Um die Anpreßkraft optimal von dem Andruckelement auf die Druckstücke zu übertragen, weist jedes Druckstück mindestens zwei in Längsrichtung der Kette im Abstand voneinander ange­ordnete Druckrollen auf. Um die Bauhöhe des Andruckelementes gering zu halten ist es zweckmäßig, daß die Druckrollen in der Längsmittelebene der Druckstücke angeordnet sind. Bei besonders hohen Anpreßkräften oder bei durch die Seilform festgelegter, geringer Breite der Druckstücke ist es mög­lich, die Druckrollen auf beiden Außenseiten der Druckstücke anzuordnen. Für besondere Anwendungsfälle kann es zweck­mäßig sein, die verschiedenen Druckrollenanordnungen zu kombinieren.In order to optimally transmit the contact pressure from the pressure element to the pressure pieces, each pressure piece has at least two pressure rollers arranged at a distance from one another in the longitudinal direction of the chain. In order to keep the overall height of the pressure element low, it is expedient for the pressure rollers to be arranged in the longitudinal center plane of the pressure pieces. With particularly high contact forces or with a narrow width of the pressure pieces determined by the rope shape, it is possible to arrange the pressure rollers on both outer sides of the pressure pieces. For special applications it can be useful to combine the different pressure roller arrangements.

Damit die Kette im Betrieb eine seitliche Führung hat und auch bei nicht eingelegtem Seil nicht von dem Andruckelement abrutschen kann, hat es sich als sinnvoll erwiesen, daß die Lauffläche des Andruckelementes beidseitig durch Führungs­stege begrenzt ist. Darüber hinaus wird durch diese Anord­nung die Montage der Seilzugvorrichtung wesentlich erleich­tert.So that the chain has a lateral guide during operation and cannot slide off the pressure element even when the rope is not inserted, it has proven to be useful that the running surface of the pressure element is delimited on both sides by guide webs. In addition, the assembly of the cable pull device is made considerably easier by this arrangement.

Wenn die Druckrollen als Wälzlager mit verstärktem Außenring ausgeführt werden, ist gewährleistet, daß die hohen radialen Anpreßkräfte auf die Druckstücke zuverlässig übertragen wer­den; die Wälzkörper sind beim Einbau von geschlossenen La­gern vor Abrieb- und Staubeintritt geschützt.If the pressure rollers are designed as roller bearings with a reinforced outer ring, it is ensured that the high radial contact forces are reliably transmitted to the pressure pieces; The rolling elements are protected against abrasion and dust when installing closed bearings.

Damit immer mindestens zwei Druckstücke gleichzeitig das Seil in die Seilrille drücken, ist es zweckmäßig, wenn dieSo that at least two pressure pieces push the rope into the rope groove at the same time, it is useful if the

Länge der zum Seilrillengrund parallelen Lauffläche des Andruckelementes mindestens ebenso groß ist wie die Strecke, welche zwei in der Kette aufeinanderfolgende Druckstücke einnehmen. Je länger der parallele Teil der Lauffläche ist, desto mehr Druckstücke können die Anpreßkraft übertragen und desto geringer wird die Flächenpressung auf die Seil­randfasern.The length of the running surface of the pressure element parallel to the base of the cable groove is at least as long as the distance which two pressure pieces in succession in the chain take up. The longer the parallel part of the tread, the more pressure pieces can transmit the contact pressure and the lower the surface pressure on the rope edge fibers.

Die Kette kann auch so ausgeführt sein, daß aufeinanderfol­gende Druckstücke durch Kettenlaschen miteinander verbunden sind, die auf den Bolzen der Druckrollen gelagert sind.The chain can also be designed so that successive thrust pieces are connected to one another by link plates which are mounted on the bolts of the pressure rollers.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und den Zeichnungen, in denen eine bevorzugte Ausführungsform der Erfindung an einem Bei­spiel näher erläutert ist. Es zeigt:

  • Fig. 1 eine Seilzugvorrichtung nach der Erfin­dung in einer seitlichen Ansicht bei abgenommenem Gehäusedeckel, wobei ein­zelne Teile der Übersichtlichkeit halber weggebrochen sind,
  • Fig. 2 eine Einzelheit der Fig. 1 in vergrößer­tem Maßstab, die das Andruckelement mit der umlaufenden Kette in einer Seiten­ansicht darstellt,
  • Fig. 3 den Gegenstand der Fig. 2 in vergrößer­tem Maßstab in einem Teilquerschnitt nach Linie III-III, der das Profil des Druckstückes und der Seilrille sowie eine Druckrolle und die Lauffläche bei in der Längsmittelebene angeordneten Druckrollen zeigt,
  • Fig. 4 ein Druckstück der Kette mit einer anderen Anordnung der Druckrollen in einer der Fig. 3 entsprechenden Darstellung und
  • Fig. 5 eine andere Ausführungsform von Druck­stück und Seilrille in einem analogen Teilquerschnitt nach Linie III-III der Fig. 2.
Further features and advantages of the invention result from the following description and the drawings, in which a preferred embodiment of the invention is explained in more detail using an example. It shows:
  • 1 shows a cable pulling device according to the invention in a side view with the housing cover removed, individual parts being broken away for the sake of clarity,
  • 2 is a detail of FIG. 1 on an enlarged scale, which shows the pressure element with the rotating chain in a side view,
  • 3 shows the subject of FIG. 2 on an enlarged scale in a partial cross section along line III-III, which shows the profile of the pressure piece and the cable groove as well as a pressure roller and the running surface with pressure rollers arranged in the longitudinal center plane,
  • Fig. 4 shows a pressure piece of the chain with a different arrangement of the pressure rollers in a representation corresponding to FIG. 3 and
  • 5 shows another embodiment of pressure piece and rope groove in an analog partial cross section along line III-III of FIG. 2.

In den Zeichnungen bezeichnet 10 eine Seilzugvorrichtung mit durchlaufendem Zugseil 11, das vorzugsweise als Stahl­seil ausgeführt ist und an dessen Lasttrum 12 die zu bewe­gende Last hängt, wohingegen das Lostrum 13 nur durch sein Eigengewicht belastet ist. Das Lasttrum 12 des Seils 11 läuft tangential in die Seilrille 16 einer im Gehäuse 14 drehbar gelagerten Treibscheibe 15 ein, umschlingt diese und wird als Lostrum 13 wieder tangential aus dem Gehäuse 14 geleitet. Der Antrieb der Treibscheibe 15 ist nicht Gegenstand der Erfindung und deshalb nicht dargestellt. Die Treibscheibe 15 hat bei den in den Fig. 3 und 4 dargestell­ten Ausführungsformen eine dem Profil des Seiles 11 angepaßte, halbkreisförmige Seilrille 16. Um die Treibfähigkeit noch zu erhöhen, kann die Seilrille 16 auch als Keilrille ausge­führt sein, wie das in Fig. 5 dargestellt ist.In the drawings, 10 denotes a cable pulling device with a continuous pulling cable 11, which is preferably designed as a steel cable and on the load strand 12 of which the load to be moved hangs, whereas the lost drum 13 is loaded only by its own weight. The load strand 12 of the rope 11 runs tangentially into the rope groove 16 of a traction sheave 15 rotatably mounted in the housing 14, wraps around it and is guided tangentially out of the housing 14 again as a lost drum 13. The drive of the traction sheave 15 is not the subject of the invention and is therefore not shown. In the embodiments shown in FIGS. 3 and 4, the traction sheave 15 has a semicircular cable groove 16 which is adapted to the profile of the cable 11. In order to further increase the driving capacity, the cable groove 16 can also be designed as a wedge groove, as is the case in FIG. 5 is shown.

Wie aus Fig. 1 hervorgeht, wird das Seil 11 am Ende seines Umschlingungsweges von einer Druckvorrichtung 17 in die Seilrille 16 der Treibscheibe 15 gedrückt. Die Druckvorrich­tung 17 besteht aus einem auf einem federbelasteten Hebel 18 kippbar gelagerten, nierenförmigen Andruckelement 19, auf dessen Lauffläche 20 sich Druckrollen 21 abwälzen. Die Druckrollen 21 sind auf den Bolzen 25 einer Gelenkkette 22 gelagert, deren Kettenglieder abwechselnd von Druckstücken 24 und an deren Außenseiten 33 montierten, auf den Bolzen 25 gelagerten Laschen 26 gebildet werden. Die Lauffläche 20 des Andruckelementes 19 verläuft auf ihrem der Treib­scheibe 15 zugewandten Teil über die Länge L parallel zur Seilrille 16 der Treibscheibe 15 und wird auf jeder Seite durch je einen Führungssteg 27 begrenzt, um ein Abrutschen der Kette 22 von der Lauffläche 20 zu verhindern und um den Druckrollen 21 eine seitliche Führung zu geben.As can be seen from FIG. 1, the rope 11 is pressed at the end of its looping path by a pressure device 17 into the rope groove 16 of the traction sheave 15. The pressure device 17 consists of a kidney-shaped pressure element 19 which is tiltably mounted on a spring-loaded lever 18 and on the running surface 20 of which pressure rollers 21 roll. The pressure rollers 21 are mounted on the pin 25 of an articulated chain 22, the chain links of which are alternately mounted on the pin 25 by pressure pieces 24 and on their outer sides 33 stored tabs 26 are formed. The running surface 20 of the pressure element 19 runs on its part facing the traction sheave 15 over the length L parallel to the cable groove 16 of the traction sheave 15 and is delimited on each side by a guide web 27 in order to prevent the chain 22 from slipping off the running surface 20 and to give the pressure rollers 21 lateral guidance.

Die Druckstücke 24 sind auf ihrer dem Seil 11 zugewandten Seite der Treibscheibe 15 zirkular angepaßt und haben, wie Fig. 3 und 5 zeigen, eine Profilierung 28, welche dem Außendurchmesser des Seiles 11 angepaßt ist. Diese Profil­gestaltung hat den Vorteil, daß die Anpreßkraft gleichmäßig auf das Seil 11 verteilt wird, was zu einer Verminderung der Abnutzung des Seiles 11 führt. Die Druckstücke 24 sind auf der dem Andruckelement 19 zugewandten Seite in Lauf­richtung der Kette 22 mit einer Nut 29 und am vorderen und hinteren Ende mit einer Querbohrung versehen, die zur Auf­nahme von Bolzen 25 dienen, die gleichzeitig Achsen der Druckrollen 21 sind. An den Außenseiten 33 der Stege 31, welche die Nuten 29 in den Druckstücken 24 seitlich begren­zen, sind Laschen 26 angeordnet, die aufeinanderfolgende Druckstücke 24 miteinander verbinden und die auf den Bolzen 25 mit Sprengringen 30 gesichert sind. Der Sprengring kann auch durch einen Nietkopf ersetzt werden. Die Druck­rollen 21 sind als Wälzlager mit verstärktem Außenring ausgeführt, um auch große Andruckkräfte übertragen zu können. Zum Schutz gegen Fremdkörpereintritt werden ge­schlossene Lager verwendet.The pressure pieces 24 are circularly adapted on their side of the traction sheave 15 facing the cable 11 and, as shown in FIGS. 3 and 5, have a profiling 28 which is adapted to the outer diameter of the cable 11. This profile design has the advantage that the contact pressure is evenly distributed on the rope 11, which leads to a reduction in the wear of the rope 11. The pressure pieces 24 are provided on the side facing the pressure element 19 in the running direction of the chain 22 with a groove 29 and at the front and rear end with a transverse bore which serve to receive bolts 25 which are also axes of the pressure rollers 21. On the outer sides 33 of the webs 31, which laterally delimit the grooves 29 in the pressure pieces 24, tabs 26 are arranged which connect successive pressure pieces 24 to one another and which are secured on the bolts 25 with snap rings 30. The snap ring can also be replaced with a rivet head. The pressure rollers 21 are designed as roller bearings with a reinforced outer ring in order to be able to transmit large pressure forces. Closed bearings are used to protect against foreign body entry.

Wie aus Fig. 2 hervorgeht, liegen bei der dargestellten Aus­führungsform immer zwei Druckstücke 24 auf dem Seil 11 auf, während ein drittes Druckstück 24 auf das Seil aufläuft bzw. vom Seil abläuft. Um dies zu erreichen, muß der zum Seil­rillengrund parallel verlaufende Teil der Lauffläche 20 desAs can be seen from FIG. 2, in the illustrated embodiment, two pressure pieces 24 always rest on the rope 11, while a third pressure piece 24 runs onto the rope or runs off the rope. In order to achieve this, the part of the tread 20 of the tread 20 that runs parallel to the bottom of the cable groove

Andruckelementes 19 eine Länge L haben, die mindestens eben­so groß ist wie die Strecke S, welche zwei in der Kette auf­einanderfolgende Druckstücke 24 einnehmen. Besonders zweck­mäßig ist eine Ausführungsform, bei der die Länge L der Lauffläche des Andruckelementes dreimal so groß ist wie die Strecke S, welche zwei aufeinanderfolgende Druckstücke ein­nehmen. Das Seil wird dann auf großer Länge in die Rille gedrückt. Diese Ausführungsform ist in der Zeichnung jedoch nicht dargestellt. Durch die geometrische Gestaltung des An­druckelementes 19 wird eine Schwenkbewegung der Druckstücke 24 unter dem Anpreßdruck verhindert und es werden Linien­beruhrungen zwischen Druckstück 24 und Seil 11 vermieden, die einen hohen Seilverschleiß zur Folge haben.The pressure element 19 has a length L which is at least as long as the distance S which two pressure pieces 24 consecutive in the chain occupy. An embodiment is particularly expedient in which the length L of the running surface of the pressure element is three times as great as the distance S which two successive pressure pieces take up. The rope is then pressed into the groove over a large length. However, this embodiment is not shown in the drawing. Due to the geometric design of the pressure element 19, a pivoting movement of the pressure pieces 24 under the contact pressure is prevented and line contacts between pressure piece 24 and rope 11 are avoided, which result in high rope wear.

Eine weitere mögliche Anordnung der Druckrollen 21 auf dem Druckstück 24 zeigt Fig. 4. Bei dieser Anordnung sind an den Außenseiten 33 des Druckstucks 24 auf jedem Bolzen 25 zwei Druckrollen 21 fliegend gelagert, die sich auf Laufflächen 20 des Andruckelementes 19 abwälzen und von einem in der Mitte der Laufflächen 20 angeordneten Führungssteg 27 ge­führt werden. Hierdurch verringert sich die Flächenpressung zwischen Bolzen 25 und Druckstück 24. Bei Drehung der Treib­scheibe 15 werden das Seil 11 und die Kette 22 durch Reib­schluß mit gleicher Winkelgeschwindigkeit mitgenommen. Der Reibschluß kann in Kraftschluß verwandelt werden, wenn an die Treibscheibe 15 eine Art Kettenrad mit der Teilung der Kette 22 angebracht wird. Hierbei genügt es, wenn nur auf einer Seite der Kette ein Kettenrad angebracht wird, in welches die Bolzen 25 nur mit einem Ende eingreifen.A further possible arrangement of the pressure rollers 21 on the pressure piece 24 is shown in FIG. 4. In this arrangement, two pressure rollers 21 are overhung on the outside 33 of the pressure piece 24 on each pin 25, which roll on running surfaces 20 of the pressure element 19 and from one in the middle of the treads 20 arranged guide web 27 are guided. This reduces the surface pressure between the pin 25 and the pressure piece 24. When the traction sheave 15 rotates, the rope 11 and the chain 22 are taken along by frictional engagement at the same angular velocity. The frictional engagement can be converted into frictional engagement if a type of sprocket with the pitch of the chain 22 is attached to the drive pulley 15. In this case, it is sufficient if a chain wheel is attached to only one side of the chain, in which the bolts 25 engage only at one end.

Die Kette 22 selbst ist keiner Zugbelastung unterworfen und läuft deshalb weitgehend verschleißfrei auf der Lauffläche 20 um das Andruckelement 19.The chain 22 itself is not subjected to any tensile load and therefore runs largely wear-free on the running surface 20 around the pressure element 19.

Die Erfindung ist nicht auf die dargestellte und beschriebe­ne Ausführungsform beschränkt, sondern es sind mehrere Ände­rungen und Ergänzungen möglich, ohne den Rahmen der Erfin­dung zu verlassen. Beispielsweise ist es möglich, statt des Stahlseiles einen gewirkten Kunstfasergurt als Zugmittel zu verwenden, der auf einer flachen, gummierten Treibscheibe eine großflächige, lastverteilende Auflage findet und gün­stige Reibwerte nutzen könnte. Die Druckstücke können an­stelle von mehreren im Langsabstand voneinander angeordne­ten Druckrollen auch nur mit mindestens einer Druckrolle in der Mitte versehen sein. Wesentlich ist nur, daß es zu kei­nen Schwenkbewegungen der Druckstücke unter Anpreßdruck kommt.The invention is not limited to the illustrated and described embodiment, but several changes and additions are possible without leaving the scope of the invention. For example, instead of the steel cable, it is possible to use a knitted synthetic fiber belt as a traction device, which has a large, load-distributing support on a flat, rubberized traction sheave and could use favorable coefficients of friction. Instead of a plurality of pressure rollers arranged in a longitudinal distance from one another, the pressure pieces can also be provided with at least one pressure roller in the middle. It is only essential that there is no pivoting movement of the pressure pieces under contact pressure.

Das Andruckelement 19 kann auch lastabhängig angestellt werden.The pressure element 19 can also be adjusted depending on the load.

Claims (11)

1. Seilzugvorrichtung mit einer angetriebenen Treibscheibe und mit einem durchlaufenden Seil, dessen Lasttrum die Treibscheibe umschlingt und am Ende der Umschlingung von mindestens einem Andruckelement über Druckstücke, die in den Gliedern einer um ein Führungselement umlaufenden, endlosen Kette angeordnet sind, in die Seilrille der Treibscheibe gedrückt wird, dadurch ge­kennzeichnet, daß das Führungselement als Andruckelement (19) ausgebildet ist und mindestens eine zum Seilrillengrund parallele Lauffläche (20) aufweist, auf der sich Druckrollen (21) abwälzen, die in der Kette (22) an den Druckstücken (24) drehbar gelagert sind.1.Cable pulling device with a driven traction sheave and with a continuous rope, the load strand of which wraps around the traction sheave and at the end of the wrapping of at least one pressure element via thrust pieces which are arranged in the links of an endless chain running around a guide element, into the rope groove of the traction sheave is pressed, characterized in that the guide element is designed as a pressure element (19) and has at least one running surface (20) parallel to the base of the cable groove, on which pressure rollers (21) roll, which act in the chain (22) on the pressure pieces (24) are rotatably mounted. 2. Vorrichtung nach Anspruch 1, dadurch ge­kennzeichnet, daß das Andruckelement (19) kippbar gelagert ist.2. Device according to claim 1, characterized in that the pressure element (19) is tiltably mounted. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Druckstücke (24) in jedem zweiten Kettenglied (23) angeordnet sind.3. Apparatus according to claim 1 or 2, characterized in that the pressure pieces (24) are arranged in every second chain link (23). 4. Vorrichtung nach einem der Ansprüche 1 bis 3, da­durch gekennzeichnet, daß jedes Druckstück (24) mindestens zwei in Laufrichtung der Kette (22) im Abstand voneinander angeordnete Druckrollen (21) aufweist.4. Device according to one of claims 1 to 3, characterized in that each pressure piece (24) has at least two pressure rollers (21) spaced apart in the running direction of the chain (22). 5. Vorrichtung nach einem der Ansprüche 1 bis 4, da­durch gekennzeichnet, daß die Druckrollen (21) in der Längsmittelebene der Druckstücke (24) angeordnet sind.5. Device according to one of claims 1 to 4, characterized in that the pressure rollers (21) are arranged in the longitudinal center plane of the pressure pieces (24). 6. Vorrichtung nach einem der Ansprüche 1 bis 5, da­durch gekemmzeichnet, daß die Druckrollen (21) auf beiden Außenseiten (33) der Druck­stücke (21) angeordnet sind.6. Device according to one of claims 1 to 5, characterized in that the pressure rollers (21) are arranged on both outer sides (33) of the pressure pieces (21). 7. Vorrichtung nach einem der Ansprüche 1 bis 6, da­durch gekennzeichnet, daß die Lauffläche (20) des Andruckelementes (19) beidseitig durch Führungsstege (27) begrenzt ist.7. Device according to one of claims 1 to 6, characterized in that the running surface (20) of the pressure element (19) is delimited on both sides by guide webs (27). 8. Vorrichtung nach einem der Ansprüche 1 bis 7, da­durch gekennzeichnet, daß die Druckrollen (21) als geschlossene Wälzlager mit ver­stärktem Außenring ausgeführt sind.8. Device according to one of claims 1 to 7, characterized in that the pressure rollers (21) are designed as closed rolling bearings with a reinforced outer ring. 9. Vorrichtung nach einem der Ansprüche 1 bis 8, da­durch gekennzeichnet, daß die Länge (L) der zum Seilrillengrund parallelen Lauffläche (20) des Andruckelementes (19) mindestens ebenso groß ist wie die Strecke, welche zwei in der Kette aufeinan­derfolgende Druckstücke (24) einnehmen.9. Device according to one of claims 1 to 8, characterized in that the length (L) of the tread parallel to the bottom of the cable groove (20) of the pressure element (19) is at least as large as the distance which two consecutive pressure pieces in the chain (24th ) take in. 10. Vorrichtung nach einem der Ansprüche 1 bis 9, da­durch gekennzeichnet, daß die Länge (L) des parallelen Teils der Lauffläche (20) des Andruckelementes (19) dreimal so groß ist wie die Strek­ke (5), welche zwei in der Kette aufeinanderfolgende Druckstücke (24) einnehmen.10. Device according to one of claims 1 to 9, characterized in that the length (L) of the parallel part of the tread (20) of the pressure element (19) is three times as large as the distance (5), which two in the chain successive Take in thrust pieces (24). 11. Vorrichtung nach einem der Ansprüche 1 bis 10, da­durch gekennzeichnet, daß aufein­anderfolgende Druckstücke (24) durch Laschen (26) unter­einander verbunden sind, die auf den Bolzen (25) der Druckrollen (21) gelagert sind.11. Device according to one of claims 1 to 10, characterized in that successive pressure pieces (24) are connected to one another by tabs (26) which are mounted on the bolts (25) of the pressure rollers (21).
EP89115800A 1988-09-23 1989-08-26 Cable traction device Expired - Lifetime EP0360033B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832360 1988-09-23
DE3832360A DE3832360C1 (en) 1988-09-23 1988-09-23

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EP0360033A1 true EP0360033A1 (en) 1990-03-28
EP0360033B1 EP0360033B1 (en) 1993-02-03

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DE (1) DE3832360C1 (en)
ES (1) ES2039054T3 (en)

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DE102012110782A1 (en) 2012-11-09 2014-05-15 Technische Universität Dresden Clamping hoist structure used in e.g. small goods area, for moving or holding loads, has clamping jaws that are mounted in axial direction on driving disc portion and are displaced against force action of rope perpendicular to axis

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US7021510B2 (en) * 2004-02-12 2006-04-04 David Irwin Ellingson Cable traction apparatus and method
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US20090200529A1 (en) * 2008-02-07 2009-08-13 Safeworks, Llc Multi-use hoist system
DE102017101656A1 (en) 2017-01-27 2018-08-02 Technische Universität Dresden Cable winch

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DE102012110782A1 (en) 2012-11-09 2014-05-15 Technische Universität Dresden Clamping hoist structure used in e.g. small goods area, for moving or holding loads, has clamping jaws that are mounted in axial direction on driving disc portion and are displaced against force action of rope perpendicular to axis
DE102012110782B4 (en) 2012-11-09 2017-03-30 Technische Universität Dresden terminal winds

Also Published As

Publication number Publication date
ES2039054T3 (en) 1993-08-16
US5082248A (en) 1992-01-21
DE3832360C1 (en) 1990-02-01
EP0360033B1 (en) 1993-02-03

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