EP0724916A1 - Pipe cleaning machine for driving cleaning snakes - Google Patents

Pipe cleaning machine for driving cleaning snakes Download PDF

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Publication number
EP0724916A1
EP0724916A1 EP96101163A EP96101163A EP0724916A1 EP 0724916 A1 EP0724916 A1 EP 0724916A1 EP 96101163 A EP96101163 A EP 96101163A EP 96101163 A EP96101163 A EP 96101163A EP 0724916 A1 EP0724916 A1 EP 0724916A1
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EP
European Patent Office
Prior art keywords
coupling
housing
clutch
hollow shaft
jaws
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
EP96101163A
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German (de)
French (fr)
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EP0724916B1 (en
Inventor
Jürgen Dipl.-Ing. Trüschler
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Rothenberger Werkzeuge AG
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Rothenberger Werkzeugemaschinen GmbH
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Publication of EP0724916A1 publication Critical patent/EP0724916A1/en
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Publication of EP0724916B1 publication Critical patent/EP0724916B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"

Definitions

  • the invention relates to a pipe cleaning machine for driving spring shafts through a hollow shaft connected to a drive motor, which is mounted in a machine housing and acts on a rotary coupling with at least two coupling jaws, which is radially and axially movable in recesses delimited by parallel surfaces of a rotatable with the hollow shaft Jaw holder are stored and can be pressed under the influence of a control device on the spring shaft.
  • Pipe cleaning machines of this type with two clutch shoes are known from DE-PS 27 14 124.
  • spring shafts which are relatively torsionally stiff but otherwise flexible coil springs, of which several can also be passed through the hollow shaft of the pipe cleaning machine through specially designed couplings.
  • various cleaning tools can be attached, which are used to drill or cut contaminants in pipelines, which can have a very tortuous course.
  • These tools include, for example, cross-blade drills, ring saws, centrifugal chains, milling heads, etc. It is also possible to pass pressure hoses through the spring shafts, so that an additional flushing action can be generated in the area of the cleaning tool.
  • the jaw holder is rigidly connected to the hollow shaft and is overhung by means of this outside the machine housing.
  • the jaw holder has two approximately rectangular recesses, in which two coupling jaws are arranged diametrically opposite the axis of rotation, which interact via two parallel inclined surfaces with crossbars on the one hand and axially movable tappets on the other, in order to carry out a radial movement through the implementation of an axial movement, through which the Clutch jaws are brought into frictional engagement with the spring shaft.
  • This floating bearing is to be able to dismantle and clean or replace the clutch shoes individually without further disassembly work.
  • the second inclined surfaces are formed by inclined longitudinal grooves in only one side wall of the coupling jaws, so that forces are generated by this one-sided guidance, which at least promote tilting of the coupling jaws.
  • a main problem of the known solution is that the overhung jaw holder due to its sharp corners and edges, which protrude considerably from the machine housing, one poses a certain danger to the operator, since objects can get caught in the relatively jagged surface of the jaw holder when it rotates.
  • a protective housing is supplied, which makes it difficult to replace the individual clutch shoes. In addition, the operator can refrain from unscrewing the protective housing!
  • the invention is therefore based on the object of specifying a pipe cleaning machine of the type described in the introduction, in which rotating parts protruding from the machine housing cannot get caught with other objects and in which the clutch shoes do not have to be handled individually for the purpose of cleaning and / or replacement .
  • the object is achieved in the pipe cleaning machine described in the introduction in that the hollow shaft is rotatably connected at one end to a circumferentially at least substantially closed clutch housing larger inner diameter than the inner diameter of the hollow shaft and that The jaw holder with the clutch jaws is mounted in the clutch housing so that it can rotate, but can be removed in the axial direction.
  • the jaw holder with the coupling jaws thus have the shape and properties of a "coupling cartridge", and the operator of such a pipe cleaning machine can carry a whole series of coupling cartridges with them, whose connection dimensions are matched to the coupling housing of the same pipe cleaning machine, so that it is only the Pulling out such a cartridge from the clutch housing and replacing it with another cartridge is required to convert the pipe cleaning machine in question to a different diameter of the spring shafts.
  • the fixed connection of the clutch housing with the hollow shaft which has a smaller inner diameter, at the same time ensures that no impurities which are carried along by the spring shaft can penetrate into the interior of the machine.
  • a particularly easily detachable and restorable connection of the jaw holder in the clutch housing consists in the use of a bayonet connection known per se.
  • the coupling housing with the jaw holder is accommodated in the machine housing at least over most of its length, which can also be done by a projecting collar attached to the machine housing. This eliminates any risk to the operator from a component rotating at high speed.
  • At least one rotary bearing for the hollow shaft is arranged between the clutch housing and the machine housing. In this way, a floating mounting of the jaw holder is avoided and a tendency to vibrate is suppressed.
  • the second guide body is namely passed through the respective coupling jaw and is supported at both ends in the jaw holder. If the clutch shoe is to be replaced, it is easily possible to drive the second guide body, which can be designed as a cylindrical pin or a grooved pin, out of its two bores, after which the clutch shoe can be removed from the jaw holder by a slight pivoting movement. However, this does not cause any difficulties, since the jaw holder with the clutch jaws is removed as a whole from the clutch housing in the form of a cartridge.
  • the coupling jaws each have a blind bore in the center, the axis of which extends in the direction of the longest cross-sectional axis of the elongated hole and in which between the end of the blind hole and a compression spring is arranged in the guide body located in the elongated hole, by means of which the coupling jaw is displaced into its most open position after the control device has been withdrawn.
  • This central arrangement of the compression springs also generates absolutely symmetrical forces which prevent the coupling jaws from tilting between the parallel walls of the recesses in the jaw holder.
  • the compression spring is protected and is captively trapped between the coupling jaw and the guide body as long as it is not removed. Because the central bore for the compression spring starts from the friction surface, this compression spring can be installed and removed through the friction surface as long as the guide body is not inserted. After inserting the guide body, the compression spring is held captive and protected.
  • a pipe cleaning machine 1 is shown, to which a machine housing 2 belongs, which consists of a frame or a central frame and two lids, but which are not shown or removed here in detail.
  • the machine housing 2 is equipped with casters 3.
  • a hollow shaft 4 with a horizontal axis of rotation A-A is arranged in the interior of the machine housing 2 and is mounted near its front end in a bearing block 5 with a roller bearing 6.
  • the hollow shaft 4 is driven by a belt drive 7 and an electric drive motor 8. Power connections, switches, etc. are shown in a hint, but are not numbered, since these parts of the equipment belong to the prior art.
  • the hollow shaft 4 is provided in a torsion-proof manner with a clutch housing 9, which to a certain extent represents an extension of the hollow shaft 4, but has a significantly larger inner diameter than the hollow shaft 4 itself.
  • This clutch housing is at least essentially closed on the circumference and is composed of two stepped cylinder surfaces limited, of which the larger one forms a support shoulder 10 for two roller bearings 11, via which the clutch housing 9 and thus the other end of the hollow shaft 4 are supported in the machine housing 2.
  • This has on the circumference of the clutch housing 9 or from its support shoulder 10 a projecting annular collar 12, which protects the operator from any accidental contact with the clutch housing 9.
  • the coupling housing 9 is accommodated with its support shoulder 10 over its entire length in the machine housing 2.
  • the coupling housing 9 forms in cooperation with the built-in parts described in more detail below, a rotary coupling 13, of whose jaw holder 14 only a short piece of pipe 15 is visible, which serves as a handle for the removal of the jaw holder, but has no surface irregularities that can be caught with other objects could serve.
  • the rotary clutch 13 is actuated by a control device 16, which will be explained in more detail with reference to FIG. 2.
  • the control device 16 includes an angled hand lever 17, only a portion of which is shown, and which is inserted into the machine housing 2 through a bellows 18.
  • the rotary clutch 13 can be controlled by moving the hand lever 17 up and down in the direction of the double arrow 19, for this purpose the hand lever 17 is connected to a shift fork 20 which is located in the interior of the machine housing 2.
  • FIG. 2 shows the manner in which the hollow shaft 4 is connected to the clutch housing 9 designed as a revolution body, namely by means of a shrink fit.
  • the clutch housing has stepped inner and outer cylinder surfaces and is detachably connected to the jaw holder 14 via a multi-part bayonet connection 21.
  • the jaw holder 14 has a main part 22 in which there are two radial recesses 23 which are delimited by parallel surfaces 24 and 25.
  • the cohesion takes place via a closed ring part 26, in which there are cylindrical pins 27 which are parts of the bayonet connection 21.
  • the jaw holder 14 can be removed from the clutch housing 9 in the axial direction, with the two clutch jaws 28 and 29, which are axially and radially movable between the surfaces 24 and 25.
  • the clutch housing 9 has a much larger inner diameter than the hollow shaft 4.
  • the shoe holder 14 has two guide bodies 30 and 31 for each coupling shoe 28 and 29, which are designed as cylindrical pins, are guided transversely through the recesses 23 and are mounted on both sides of the respective recess 23 in the shoe holder 14. At least the guide bodies 31 can be easily driven out of their bores. That’s why Guide body 30 and 31 clamped at both ends, and there are two symmetrically acting abutments for the clutch shoes.
  • the clutch shoes 28 and 29 each have a first inclined surface 32 for contact with the first guide body 30 and a continuous elongated hole 33 running transversely to the hollow shaft 4, one surface of which has a second inclined surface 34 for the contact the second guide body 31.
  • the two inclined surfaces 32 and 34 run parallel to one another.
  • the coupling jaws also have two plane-parallel side surfaces 35 and 36, so that they are guided with play in the recesses 23, and a friction surface 37 for cooperation with the spring shaft (not shown).
  • the friction surfaces 37 can have a different shape, so that they can also interact with spring shafts of different diameters.
  • the clutch shoes 28 and 29 each have a blind bore 38 in the center, starting from their friction surface 37, the axis 39 of which extends in the direction of the longest cross-sectional axis of the elongated hole 33 and in that between the end of the blind hole 38 and that in the elongated hole located guide body 31, a compression spring 40 is arranged, by means of which the clutch shoes 28 and 29 are moved into their most open position after the control device 16 has been withdrawn.
  • the control device 16 acts on the clutch shoes 28 and 29 by means of axially parallel impacts 41 and 42. These plungers 41 and 42 are fastened to a pressure ring 43 which surrounds the hollow shaft 4 and is displaceable against the action of a pressure spring 44 which is supported on the clutch housing 9 (FIG. 2).
  • the shift occurs with the interposition of a Thrust bearing 45 by means of a sliding sleeve 46 on which the shift fork 20 engages via an articulated connection 47.
  • the shift fork 20 is in turn mounted by means of a hinge pin 49 on a bearing block 48 which is fixedly connected to the machine housing 2.
  • the tappets By pivoting the shift fork by means of the hand lever 17 in a clockwise direction, the tappets are shifted from the relief position shown in FIG. 2, below, into the working position, shown in FIG. 2, above, the clutch shoes 28 and 29 interacting due to the guide bodies 30 and 31 Carry out movements with axial and radial components with the inclined surfaces 32 and 34.
  • the assembly shown in FIG. 3 the so-called clutch cartridge, can be removed from the clutch housing 9 and cleaned and / or replaced by another clutch cartridge (for different diameters of the spring shafts) in the manner already described.
  • FIGs 7 and 8 in which the same reference numerals are used, show a cartridge-shaped jaw holder 14 with three coupling jaws 28, 29 and 50, which are arranged equidistantly on the circumference of the jaw holder 14. There are trough-shaped notches 51 between the recesses in order to make the bores for the pin-shaped guide bodies 30 and 31 easier and to drive the guide bodies themselves more easily.
  • the bayonet connection has also been changed and there are now three cylinder bolts 27.
  • the control device must then also be supplemented by a further tappet.
  • the pipe section 15 was made more grippy by knurling 15a.

Abstract

A hollow shaft (4) connected to a drive motor is supported in a machine housing (2) in such a way as to act on a rotary coupling (13) with at least two coupling jaws (28, 29). These jaws are held with freedom of radial and axial movement in recesses (23) in a jaw holder (14), which is able to rotate with the hollow shaft, the recesses being bounded by parallel surfaces (24, 25). The jaws can be pressed radially against the spiral wire rod under the action of a control device (16). To increase the operating reliability and to make it easier to replace the coupling jaws, one end of the hollow shaft (4) is connected nonrotatably with respect to a coupling housing (9), the circumference of which is at least mostly closed, and the jaw holder (14) with the coupling jaws (28, 29) is supported in the coupling housing (9) in such a way that it is not free to rotate but can be removed in the axial direction.

Description

Die Erfindung betrifft eine Rohrreinigungsmaschine für den Antrieb von Federwellen durch eine mit einem Antriebsmotor verbundene Hohlwelle, die in einem Maschinengehäuse gelagert ist und auf eine Rotationskupplung mit mindestens zwei Kupplungsbacken einwirkt, die radial und axial beweglich in von parallelen Flächen begrenzten Ausnehmungen eines mit der Hohlwelle drehbaren Backenhalters gelagert sind und unter dem Einfluß einer Steuereinrichtung an die Federwelle anpreßbar sind.The invention relates to a pipe cleaning machine for driving spring shafts through a hollow shaft connected to a drive motor, which is mounted in a machine housing and acts on a rotary coupling with at least two coupling jaws, which is radially and axially movable in recesses delimited by parallel surfaces of a rotatable with the hollow shaft Jaw holder are stored and can be pressed under the influence of a control device on the spring shaft.

Rohrreinigungsmaschinen dieses Typs mit zwei Kupplungsbacken sind durch die DE-PS 27 14 124 bekannt. Bekannt sind auch die sogenannten Federwellen, bei denen es sich um relativ torsionssteife aber ansonsten flexible Schraubenfedern handelt, von denen auch mehrere durch speziell ausgebildete Kupplungen aneinandergereiht durch die Hohlwelle der Rohrreinigungsmaschine hindurchgeführt werden können. Am vorderen äußersten Ende dieser Federwellen können verschiedene Reinigungswerkzeuge angebracht werden, die zum Aufbohren oder Aufschneiden von Verunreinigungen in Rohrleitungen dienen, die einen sehr gewundenen Verlauf haben können. Zu diesen Werkzeugen gehören beispielsweise Kreuzblattbohrer, Ringsägen, Schleuderketten, Fräsköpfe, etc.. Es ist auch möglich, durch die Federwellen Druckschläuche hindurchzuführen, so daß im Bereich des Reinigungswerkzeugs eine zusätzliche Spülwirkung erzeugt werden kann.Pipe cleaning machines of this type with two clutch shoes are known from DE-PS 27 14 124. Also known are the so-called spring shafts, which are relatively torsionally stiff but otherwise flexible coil springs, of which several can also be passed through the hollow shaft of the pipe cleaning machine through specially designed couplings. At the front extreme end of these spring shafts, various cleaning tools can be attached, which are used to drill or cut contaminants in pipelines, which can have a very tortuous course. These tools include, for example, cross-blade drills, ring saws, centrifugal chains, milling heads, etc. It is also possible to pass pressure hoses through the spring shafts, so that an additional flushing action can be generated in the area of the cleaning tool.

Die Handhabung derartiger Rohrreinigungsmaschinen und Federwellen setzt eine große Geschicklichkeit der Bedienungsperson voraus, die durch Ein- und Ausschalten des Motors und der Reibungskupplung sowie gegebenenfalls auch durch alternierende Drehrichtungsumkehr die Wirkung des Reinigungswerkzeuges beeinflussen muß, damit dieses den notwendigen Vorschub in der Rohrleitung ausführt, sich hierbei aber nicht festfrißt. Abgesehen von der Steuerung der Rohrreinigungsmaschine muß die Bedienungsperson auch die Federwelle von Hand beeinflussen. Hierzu wird die Federwelle am vorderen Ende der Rohrreinigungsmaschine und vor dem Eintritt in die Rohrleitung in einem Bogen geführt, auf den die Bedienungsperson einen Druck in Richtung einer Verkürzung des Bogens ausübt. Dadurch hat die Bedienungsperson ein Gefühl für die Arbeitsweise des Reinigungswerkzeuges. Da die Bedienungsperson dabei eine Hand am Steuerhebel der Rohrreinigungsmaschine haben muß, wird notwendigerweise die Manipulation an dem besagten Bogen der Federwelle in unmittelbarer Nähe des vorderen Maschinenendes durchgeführt. Das Ankuppeln weiterer Federwellen geschieht am hinteren Ende der Maschine.The handling of such pipe cleaning machines and spring shafts requires a high level of skill on the part of the operator, who has to influence the effect of the cleaning tool by switching the motor and the friction clutch on and off, and possibly also by alternating reversal of the direction of rotation, so that it performs the necessary feed in the pipe but not seized. In addition to controlling the pipe cleaning machine, the operator must also manually manipulate the spring shaft. For this purpose, the spring shaft is guided at the front end of the pipe cleaning machine and before entering the pipe in an arc, on which the operator exerts pressure in the direction of shortening the arc. This gives the operator a feeling for how the cleaning tool works. Since the operator must have a hand on the control lever of the pipe cleaning machine, the manipulation on said bow of the spring shaft is necessarily carried out in the immediate vicinity of the front end of the machine. Additional spring shafts are coupled at the rear end of the machine.

Bei der Rohrreinigungsmaschine nach der DE-PS 27 14 124 ist der Backenhalter starr mit der Hohlwelle verbunden und mittels dieser außerhalb des Maschinengehäuses fliegend gelagert. Zur Unterbringung der Kupplungsbacken besitzt der Backenhalter zwei etwa quaderförmige Ausnehmungen, in denen diametral zur Rotationsachse gegenüberliegend zwei Kupplungsbacken angeordnet sind, die über zwei parallele Schrägflächen mit Querstegen einerseits und axial beweglichen Stößeln andererseits zusammenwirken, um durch Umsetzung einer Axialbewegung eine Radialbewegung auszuführen, durch die die Kupplungsbacken in einen Reibungseingriff mit der Federwelle gebracht werden. Diese fliegende Lagerung hat den Zweck, die Kupplungsbacken einzeln ohne weitere Zerlegungsarbeiten ausbauen und reinigen oder ersetzen zu können.In the pipe cleaning machine according to DE-PS 27 14 124, the jaw holder is rigidly connected to the hollow shaft and is overhung by means of this outside the machine housing. To accommodate the coupling jaws, the jaw holder has two approximately rectangular recesses, in which two coupling jaws are arranged diametrically opposite the axis of rotation, which interact via two parallel inclined surfaces with crossbars on the one hand and axially movable tappets on the other, in order to carry out a radial movement through the implementation of an axial movement, through which the Clutch jaws are brought into frictional engagement with the spring shaft. The purpose of this floating bearing is to be able to dismantle and clean or replace the clutch shoes individually without further disassembly work.

Das Ausbauen und Einsetzen der Kupplungsbacken erfordert jedoch einige Geschicklichkeit und außerdem ein großes Maß an Aufmerksamkeit, wenn zu einer Rohrreinigungsmaschine für unterschiedliche Durchmesser der Federwellen auch unterschiedliche Kupplungsbacken gehören, die nicht miteinander verwechselt werden dürfen, wohl aber weitgehend gleiche Außenkonturen aufweisen. Das Ausbauen und Einsetzen der Kupplungsbacken ist nur unter Zuhilfenahme einer Schwenkbewegung möglich, und die Kupplungsbacken müssen zusätzlich gegen ein Herausfliegen durch Zentrifugalkräfte gesichert werden. Leichte Ausbaubarkeit einerseits und Sicherung gegen Zentrifugalkräfte andererseits sind schwierig miteinander zu vereinen, und die bekannten Kupplungsbacken besitzen zu diesem Zweck Nasen bzw. Vorsprünge, die die Stößel der Betätigungseinrichtung hintergreifen. Während für die ersten Schrägflächen schiefe Ebenen vorgesehen sind, werden die zweiten Schrägflächen durch schräg verlaufende Längsnuten in jeweils nur einer Seitenwand der Kupplungsbacken gebildet, so daß durch diese einseitige Führung Kräfte erzeugt werden, die ein Verkanten der Kupplungsbacken zumindest fördern. Ein Hauptproblem der bekannten Lösung besteht aber darin, daß der fliegend gelagerte Backenhalter aufgrund seiner scharfen Ecken und Kanten, die erheblich vom Maschinengehäuse abstehen, eine gewisse Gefahr für die Bedienungsperson darstellt, da sich nämlich Gegenstände in der relativ zerklüfteten Oberfläche des Backenhalters bei dessen Rotation verfangen können. In der Praxis wird ein Schutzgehäuse mitgeliefert, wodurch das Auswechseln der einzelnen Kupplungsbacken wieder erschwert wird. Außerdem kann die Bedienungsperson das Aufschrauben des Schutzgehäuses unterlassen!However, removing and inserting the clutch shoes requires some skill and also a great deal of attention if a pipe cleaning machine for different diameters of the spring shafts also includes different clutch shoes, which must not be confused with one another, but have largely the same outer contours. The coupling jaws can only be removed and inserted with the aid of a swivel movement, and the coupling jaws must also be secured against flying out by centrifugal forces. Ease of removal on the one hand and protection against centrifugal forces on the other hand are difficult to combine with one another, and the known clutch shoes have for this purpose lugs or projections which engage behind the tappets of the actuating device. While inclined planes are provided for the first inclined surfaces, the second inclined surfaces are formed by inclined longitudinal grooves in only one side wall of the coupling jaws, so that forces are generated by this one-sided guidance, which at least promote tilting of the coupling jaws. A main problem of the known solution is that the overhung jaw holder due to its sharp corners and edges, which protrude considerably from the machine housing, one poses a certain danger to the operator, since objects can get caught in the relatively jagged surface of the jaw holder when it rotates. In practice, a protective housing is supplied, which makes it difficult to replace the individual clutch shoes. In addition, the operator can refrain from unscrewing the protective housing!

Durch die US-PS 2 940 099 ist eine andere Art von Rohrreinigungsmaschinen bekannt, bei der die Hohlwelle im Innern des Maschinengehäuses unterteilt und an den aufeinander zu gerichteten Enden der Wellenteile mit Hohlkegelflächen versehen ist, die einen Satz von drei Kupplungsbacken zwischen sich einschließen. Diese sind an beiden Enden mit komplementären Sektorflächen eines Vollkegels versehen und werden nur durch die Hohlkegelflächen und einen Satz tangentialer Druckfedern zusammengehalten. Die Betätigung der Rotationskupplung erfolgt durch Zusammenschieben der Wellenteile. Ein besonderer Backenhalter ist nicht vorhanden. Dabei ist die Hohlwelle nicht gegenüber dem Maschinengehäuse abgedichtet, und zum Auswechseln und Reinigen der Kupplungsbacken muß das Maschinengehäuse geöffnet bzw. zerlegt und gegebenenfalls gereinigt werden.Another type of pipe cleaning machine is known from US Pat. No. 2,940,099, in which the hollow shaft is divided in the interior of the machine housing and is provided with hollow cone surfaces at the ends of the shaft parts which face one another and which enclose a set of three coupling jaws between them. These are provided with complementary sector surfaces of a full cone at both ends and are held together only by the hollow cone surfaces and a set of tangential compression springs. The rotary clutch is actuated by pushing the shaft parts together. There is no special jaw holder. The hollow shaft is not sealed off from the machine housing, and the machine housing must be opened or dismantled and, if necessary, cleaned to replace and clean the clutch shoes.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Rohrreinigungsmaschine der eingangs beschriebenen Gattung anzugeben, bei der aus dem Maschinengehäuse hervorstehende drehbare Teile sich nicht mit anderen Gegenständen verfangen können und bei der die Kupplungsbacken zum Zwecke einer Reinigung und/oder eines Austausches nicht einzeln gehandhabt werden müssen.The invention is therefore based on the object of specifying a pipe cleaning machine of the type described in the introduction, in which rotating parts protruding from the machine housing cannot get caught with other objects and in which the clutch shoes do not have to be handled individually for the purpose of cleaning and / or replacement .

Die Lösung der gestellten Aufgabe erfolgt bei der eingangs beschriebenen Rohrreinigungsmaschine erfindungsgemäß dadurch, daß die Hohlwelle an ihrem einen Ende verdrehfest mit einem auf dem Umfang zumindest im wesentlichen geschlossenen Kupplungsgehäuse größeren Innendurchmessers verbunden ist als der Innendurchmesser der Hohlwelle und daß der Backenhalter mit den Kupplungsbacken verdrehfest, aber in axialer Richtung herausnehmbar in dem Kupplungsgehäuse gelagert ist.The object is achieved in the pipe cleaning machine described in the introduction in that the hollow shaft is rotatably connected at one end to a circumferentially at least substantially closed clutch housing larger inner diameter than the inner diameter of the hollow shaft and that The jaw holder with the clutch jaws is mounted in the clutch housing so that it can rotate, but can be removed in the axial direction.

Durch das Merkmal der Vereinigung der Hohlwelle mit einem auf dem Umfang im wesentlichen geschlossenen Kupplungsgehäuse wird zunächst einmal eine glatte Umdrehungfläche erzeugt, die auch gegenüber dem Maschinengehäuse fliegend gelagert sein könnte - aber nicht muß - ohne daß hierdurch eine Gefährdung der Umgebung erfolgt. Durch das Merkmal der Herausnehmbarkeit des Backenhalters mit den Kupplungsbacken bleiben diese mit dem Backenhalter vereinigt, so daß eine Verwechslung unmöglich gemacht wird, solange jedenfalls die Kupplungsbacken mit dem Backenhalter vereinigt bleiben. Dennoch läßt sich der Backenhalter mit den Kupplungsbacken leicht durch einen Wasserstrahl reinigen, inspizieren und ohne aufwendige Maßnahmen oder Manipulationen wieder einsetzen.Due to the feature of the union of the hollow shaft with a coupling housing that is essentially closed on the circumference, a smooth surface of revolution is initially generated, which could also be overhung with respect to the machine housing - but not necessarily - without thereby endangering the environment. Due to the feature of the removability of the jaw holder with the coupling jaws, these remain united with the jaw holder, so that a mix-up is made impossible as long as the coupling jaws remain united with the jaw holder. Nevertheless, the jaw holder with the coupling jaws can easily be cleaned with a water jet, inspected and reinserted without complex measures or manipulations.

Die Backenhalter mit den Kupplungsbacken haben dadurch gewissermaßen die Form und Eigenschaff einer "Kupplungspatrone", und die Bedienungsperson einer derartigen Rohrreinigungsmaschine kann eine ganze Reihe von Kupplungspatronen mit sich führen, deren Anschlußmaße auf das Kupplungsgehäuse ein und derselben Rohrreinigungsmaschine abgestimmt sind, so daß es lediglich der Herausziehens einer solchen Patrone aus dem Kupplungsgehäuse und des Ersatzes durch eine andere Patrone bedarf, um die betreffende Rohrreinigungsmaschine auf einen anderen Durchmesser der Federwellen umzurüsten. Durch die feste Verbindung des Kupplungsgehäuses mit der im Innendurchmesser geringer dimensionierten Hohlwelle wird gleichzeitig erreicht, daß keine Verunreinigungen, die von der Federwelle mitgeschleppt werden, in das Maschineninnere eindringen können.The jaw holder with the coupling jaws thus have the shape and properties of a "coupling cartridge", and the operator of such a pipe cleaning machine can carry a whole series of coupling cartridges with them, whose connection dimensions are matched to the coupling housing of the same pipe cleaning machine, so that it is only the Pulling out such a cartridge from the clutch housing and replacing it with another cartridge is required to convert the pipe cleaning machine in question to a different diameter of the spring shafts. The fixed connection of the clutch housing with the hollow shaft, which has a smaller inner diameter, at the same time ensures that no impurities which are carried along by the spring shaft can penetrate into the interior of the machine.

Eine besonders einfach lösbar und wiederherstellbare Verbindung des Backenhalters im Kupplungsgehäuse besteht im Einsatz einer an sich bekannten Bajonett-Verbindung.A particularly easily detachable and restorable connection of the jaw holder in the clutch housing consists in the use of a bayonet connection known per se.

Es ist dabei im Zuge einer weiteren Ausgestaltung der Erfindung besonders vorteilhaft, wenn das Kupplungsgehäuse mit dem Backenhalter zumindest auf dem größten Teil seiner Länge im Maschinengehäuse untergebracht ist, was auch durch einen am Maschinengehäuse angebrachten vorspringenden Kragen geschehen kann. Dadurch ist jede Gefährdung der Bedienungsperson durch ein mit hoher Drehzahl rotierendes Bauteil ausgeschlossen.It is particularly advantageous in the course of a further embodiment of the invention if the coupling housing with the jaw holder is accommodated in the machine housing at least over most of its length, which can also be done by a projecting collar attached to the machine housing. This eliminates any risk to the operator from a component rotating at high speed.

Es ist weiterhin von Vorteil, wenn mindestens ein Drehlager für die Hohlwelle zwischen dem Kupplungsgehäuse und dem Maschinengehäuse angeordnet ist. Auf diese Weise wird eine fliegende Lagerung des Backenhalters vermieden und eine Schwingungsneigung unterdrückt.It is also advantageous if at least one rotary bearing for the hollow shaft is arranged between the clutch housing and the machine housing. In this way, a floating mounting of the jaw holder is avoided and a tendency to vibrate is suppressed.

Es ist im Zuge einer wiederum weiteren Ausgestaltung der Erfindung von besonderem Vorteil, wenn

  • a) der Backenhalter für jede Kupplungsbacke zwei Führungskörper aufweist, die quer durch die Ausnehmungen hindurchgeführt und auf beiden Seiten der jeweiligen Ausnehmung im Backenhalter gelagert sind,
  • b) die Kupplungsbacken je eine erste Schrägfläche für die Anlage am ersten Führungskörper und ein quer zur Hohlwelle verlaufendes, durchgehendes Langloch aufweisen, dessen eine Fläche eine zweite Schrägfläche für die Anlage an dem zweiten Führungskörper ist, wobei die beiden Schrägflächen parallel zueinander verlaufen, und wenn
  • c) die Steuereinrichtung (16) durch achsparallele Stößel (41, 42) auf die Kupplungsbacken (28, 29) einwirkt.
In the course of yet another embodiment of the invention, it is particularly advantageous if
  • a) the jaw holder has two guide bodies for each coupling jaw, which are guided transversely through the recesses and are mounted on both sides of the respective recess in the jaw holder,
  • b) the coupling jaws each have a first inclined surface for contacting the first guide body and a continuous elongated hole running transversely to the hollow shaft, one surface of which is a second inclined surface for contacting the second guide body, the two inclined surfaces running parallel to one another, and if
  • c) the control device (16) acts on the coupling shoes (28, 29) by means of axially parallel plungers (41, 42).

Auf diese Weise wird eine einwandfreie Parallelführung ohne Verkantungsneigung der Kupplungsbacken erzeugt, und zwar eine resultierende Bewegung, die sich aus einer Axialbewegung und einer Radialbewegung der Kupplungsbacken zusammensetzt, wobei die Radialbewegung die eigentliche Mitnahme der Federwelle durch Reibungskräfte herbeiführt.In this way, a perfect parallel guidance without tilting tendency of the clutch shoes is produced, namely a resulting movement, which is composed of an axial movement and a radial movement of the clutch shoes, the radial movement causing the actual entrainment of the spring shaft by frictional forces.

Weiterhin wird durch diese konstruktiven Maßnahmen dafür gesorgt, daß die Kupplungsbacken nicht ohne weiteres aus dem Backenhalter durch Zentrifugalkräfte herausfliegen können. Der zweite Führungskörper ist nämlich durch die jeweilige Kupplungsbacke hindurchgeführt und beidendig im Backenhalter gelagert. Soll die Kupplungsbacke ausgewechselt werden, so ist es auf einfache Weise möglich, den zweiten Führungskörper, der als Zylinderstift oder als Kerbstift ausgeführt sein kann, aus seinen beiden Bohrungen herauszutreiben, wonach die Kupplungsbacke durch eine geringfügige Schwenkbewegung aus dem Backenhalter herausgenommen werden kann. Dies verursacht aber keinerlei Schwierigkeiten, da der Backenhalter ja mit den Kupplungsbacken als ganzes in Form einer Patrone aus dem Kupplungsgehäuse herausgenommen wird.Furthermore, these design measures ensure that the clutch shoes cannot easily fly out of the shoe holder by centrifugal forces. The second guide body is namely passed through the respective coupling jaw and is supported at both ends in the jaw holder. If the clutch shoe is to be replaced, it is easily possible to drive the second guide body, which can be designed as a cylindrical pin or a grooved pin, out of its two bores, after which the clutch shoe can be removed from the jaw holder by a slight pivoting movement. However, this does not cause any difficulties, since the jaw holder with the clutch jaws is removed as a whole from the clutch housing in the form of a cartridge.

Es ist schließlich im Zuge einer wiederum weiteren Ausgestaltung der Erfindung mit besonderem Vorteil möglich, wenn die Kupplungsbacken, ausgehend von ihrer Reibungsfläche, mittig je eine Sackbohrung aufweisen, deren Achse in Richtung der längsten Querschnittsachse des Langloches verläuft und in der zwischen dem Ende des Sackloches und dem im Langloch befindlichen Führungskörper eine Druckfeder angeordnet ist, durch die die Kupplungsbacke nach Rückzug der Steuereinrichtung in ihre am weitesten geöffnete Stellung verschoben wird. Auch diese mittige Anordnung der Druckfedern erzeugt absolut symmetrische Kräfte, die eine Verkantungsneigung der Kupplungsbacken zwischen den parallelen Wänden der Ausnehmungen im Backenhalter verhindern. Außerdem wird die Druckfeder geschützt und ist solange unverlierbar zwischen der Kupplungsbacke und dem Führungskörper eingeschlossen, solange dieser nicht ausgebaut wird. Dadurch, daß die mittige Bohrung für die Druckfeder von der Reibungsfläche ausgeht, kann diese Druckfeder durch die Reibungsfläche ein- und ausgebaut werden, solange der Führungskörper nicht eingesetzt ist. Nach dem Einsetzen des Führungskörpers aber wird die Druckfeder unverlierbar und geschützt festgehalten.Finally, in the course of yet another embodiment of the invention, it is particularly advantageous if, starting from their friction surface, the coupling jaws each have a blind bore in the center, the axis of which extends in the direction of the longest cross-sectional axis of the elongated hole and in which between the end of the blind hole and a compression spring is arranged in the guide body located in the elongated hole, by means of which the coupling jaw is displaced into its most open position after the control device has been withdrawn. This central arrangement of the compression springs also generates absolutely symmetrical forces which prevent the coupling jaws from tilting between the parallel walls of the recesses in the jaw holder. In addition, the compression spring is protected and is captively trapped between the coupling jaw and the guide body as long as it is not removed. Because the central bore for the compression spring starts from the friction surface, this compression spring can be installed and removed through the friction surface as long as the guide body is not inserted. After inserting the guide body, the compression spring is held captive and protected.

Zwei Ausführungsbeispiele des Erfindungsgegenstandes werden nachfolgend anhand der Figuren 1 bis 8 näher erläutert.Two exemplary embodiments of the subject matter of the invention are explained in more detail below with reference to FIGS. 1 to 8.

Es zeigen:

Figur 1
eine teilweise geschnittene Seitenansicht einer vollständigen Rohrreinigungsmaschine in geöffnetem Zustand,
Figur 2
ein erstes Ausführungsbeispiel eines Backenhalters anhand eines vergrößerten Ausschnitts aus der linken oberen Ecke in Figur 1, jedoch mit einem Axialschnitt durch das dort befindliche Ende der Hohlwelle, das Kupplungsgehäuse und durch einen in diesen eingesetzten Backenhalter mit zwei Kupplungsbacken,
Figur 3
den patronenartigen Backenhalter mit zwei Kupplungsbacken aus Figur 2 in wiederum vergrößertem Maßstab,
Figur 4
eine Seitenansicht einer einzelnen Kupplungsbacke,
Figur 5
eine stirnseitige Ansicht der Kupplungsbacke nach Figur 4 in Richtung des Pfeils V,
Figur 6
eine Stirnansicht und einen teilweisen Schnitt durch den Gegenstand nach Figur 5 entlang der Linie VI-VI,
Figur 7
ein zweites Ausführungsbeispiel eines Backenhalters mit drei Kupplungsbacken, teilweise in der Seitenansicht, teilweise geschnitten, und
Figur 8
einen teilweisen Schnitt und eine teilweise Stirnansicht gemäß der Linie VIII-VIII in Figur 7.
Show it:
Figure 1
a partially sectioned side view of a complete pipe cleaning machine in the open state,
Figure 2
2 shows a first exemplary embodiment of a jaw holder based on an enlarged section from the upper left corner in FIG. 1, but with an axial section through the end of the hollow shaft located there, the clutch housing and through a jaw holder with two clutch jaws inserted therein,
Figure 3
the cartridge-like jaw holder with two coupling jaws from FIG. 2, again on an enlarged scale,
Figure 4
a side view of a single clutch shoe,
Figure 5
3 shows an end view of the clutch shoe according to FIG. 4 in the direction of arrow V,
Figure 6
4 shows an end view and a partial section through the object according to FIG. 5 along the line VI-VI,
Figure 7
a second embodiment of a jaw holder with three coupling jaws, partially in side view, partially cut, and
Figure 8
a partial section and a partial end view along the line VIII-VIII in Figure 7.

In Figur 1 ist eine Rohrreinigungsmaschine 1 dargestellt, zu der ein Maschinengehäuse 2 gehört, das aus einer Zarge bzw. einem Zentralrahmen und zwei Deckeln besteht, die hier jedoch nicht im Einzelnen dargestellt bzw. abgenommen sind. Das Maschinengehäuse 2 ist mit Fahrrollen 3 ausgestattet. Im Innern des Maschinengehäuses 2 ist eine Hohlwelle 4 mit einer waagrechten Drehachse A-A angeordnet, die in der Nähe ihres vorderen Endes in einem Lagerbock 5 mit einem Wälzlager 6 gelagert ist. Der Antrieb der Hohlwelle 4 wird durch einen Riementrieb 7 und einen elektrischen Antriebsmotor 8 bewirkt. Stromanschlüsse, Schalter etc. sind zwar andeutungsweise dargestellt, aber nicht näher beziffert, da diese Einrichtungsteile zum Stande der Technik gehören.In Figure 1, a pipe cleaning machine 1 is shown, to which a machine housing 2 belongs, which consists of a frame or a central frame and two lids, but which are not shown or removed here in detail. The machine housing 2 is equipped with casters 3. A hollow shaft 4 with a horizontal axis of rotation A-A is arranged in the interior of the machine housing 2 and is mounted near its front end in a bearing block 5 with a roller bearing 6. The hollow shaft 4 is driven by a belt drive 7 and an electric drive motor 8. Power connections, switches, etc. are shown in a hint, but are not numbered, since these parts of the equipment belong to the prior art.

Am hinteren Ende ist die Hohlwelle 4 verdrehfest mit einem Kupplungsgehäuse 9 versehen, das gewissermaßen eine Verlängerung der Hohlwelle 4 darstellt, aber einen deutlich größeren Innendurchmesser besitzt als die Hohlwelle 4 selbst. Dieses Kupplungsgehäuse ist auf dem Umfang zumindest im wesentlichen geschlossen und von zwei abgestuften Zylinderflächen begrenzt, von denen die größere eine Tragschulter 10 für zwei Wälzlager 11 bildet, über die sich das Kupplungsgehäuse 9 und damit das andere Ende der Hohlwelle 4 im Maschinengehäuse 2 abstützen. Dieses besitzt auf dem Umfang des Kupplungsgehäuses 9 bzw. von dessen Tragschulter 10 einen vorstehenden ringförmigen Kragen 12, der die Bedienungsperson vor jeder zufälligen Berührung mit dem Kupplungsgehäuse 9 schützt. Durch diesen Kragen 12 ist das Kupplungsgehäuse 9 mit seiner Tragschulter 10 auf seiner gesamten Länge im Maschinengehäuse 2 untergebracht.At the rear end, the hollow shaft 4 is provided in a torsion-proof manner with a clutch housing 9, which to a certain extent represents an extension of the hollow shaft 4, but has a significantly larger inner diameter than the hollow shaft 4 itself. This clutch housing is at least essentially closed on the circumference and is composed of two stepped cylinder surfaces limited, of which the larger one forms a support shoulder 10 for two roller bearings 11, via which the clutch housing 9 and thus the other end of the hollow shaft 4 are supported in the machine housing 2. This has on the circumference of the clutch housing 9 or from its support shoulder 10 a projecting annular collar 12, which protects the operator from any accidental contact with the clutch housing 9. Through this collar 12, the coupling housing 9 is accommodated with its support shoulder 10 over its entire length in the machine housing 2.

Das Kupplungsgehäuse 9 bildet im Zusammenwirken mit den nachstehend noch näher beschriebenen Einbauteilen eine Rotationskupplung 13, von deren Backenhalter 14 nur ein kurzes Rohrstück 15 sichtbar ist, das als Handhabe für den Ausbau des Backenhalters dient, aber keinerlei Oberflächenunregelmäßigkeiten besitzt, die zum Verfangen mit anderen Gegenständen dienen könnten.The coupling housing 9 forms in cooperation with the built-in parts described in more detail below, a rotary coupling 13, of whose jaw holder 14 only a short piece of pipe 15 is visible, which serves as a handle for the removal of the jaw holder, but has no surface irregularities that can be caught with other objects could serve.

Die Rotationskupplung 13 wird durch eine Steuereinrichtung 16 betätigt, die anhand der Figur 2 noch näher erläutert werden wird. Zu der Steuereinrichtung 16 gehört ein abgewinkelter Handhebel 17, von dem nur ein Teilstück gezeigt ist, und der durch einen Faltenbalg 18 in das Maschinengehäuse 2 eingeführt wird. Durch Auf- und Abbewegen des Handhebels 17 in Richtung des Doppelpfeils 19 läßt sich die Rotationskupplung 13 steuern, und zwar ist zu diesem Zweck der Handhebel 17 mit einer Schaltgabel 20 verbunden, die sich im Innern des Maschinengehäuses 2 befindet.The rotary clutch 13 is actuated by a control device 16, which will be explained in more detail with reference to FIG. 2. The control device 16 includes an angled hand lever 17, only a portion of which is shown, and which is inserted into the machine housing 2 through a bellows 18. The rotary clutch 13 can be controlled by moving the hand lever 17 up and down in the direction of the double arrow 19, for this purpose the hand lever 17 is connected to a shift fork 20 which is located in the interior of the machine housing 2.

Figur 2 zeigt, in welcher Weise die Hohlwelle 4 mit dem als Umdrehungskörper ausgebildeten Kupplungsgehäuse 9 verbunden ist, nämlich durch einen Schrumpfsitz. Das Kupplungsgehäuse weist abgestufte innere und äußere Zylinderflächen auf und ist über eine mehrteilige Bajonett-Verbindung 21 lösbar mit dem Backenhalter 14 verbunden.FIG. 2 shows the manner in which the hollow shaft 4 is connected to the clutch housing 9 designed as a revolution body, namely by means of a shrink fit. The clutch housing has stepped inner and outer cylinder surfaces and is detachably connected to the jaw holder 14 via a multi-part bayonet connection 21.

Gemäß den Figuren 3 und 6 besitzt der Backenhalter 14 ein Hauptteil 22, in dem sich zwei radiale Ausnehmungen 23 befinden, die von parallelen Flächen 24 und 25 begrenzt sind. Der Zusammenhalt erfolgt über ein geschlossenes Ringteil 26, in dem sich Zylinderstifte 27 befinden, die Teile der Bajonett-Verbindung 21 sind. Durch Einschieben, Drehen und Herausziehen mittels des Rohrstücks 15 läßt sich der Backenhalter 14 in axialer Richtung aus dem Kupplungsgehäuse 9 herausnehmen, und zwar mit den beiden Kupplungsbacken 28 und 29, die axial und radial beweglich zwischen den Flächen 24 und 25 geführt sind. Das Kupplungsgehäuse 9 besitzt einen wesentlich größeren Innendurchmesser als die Hohlwelle 4.According to FIGS. 3 and 6, the jaw holder 14 has a main part 22 in which there are two radial recesses 23 which are delimited by parallel surfaces 24 and 25. The cohesion takes place via a closed ring part 26, in which there are cylindrical pins 27 which are parts of the bayonet connection 21. By inserting, turning and pulling out by means of the pipe section 15, the jaw holder 14 can be removed from the clutch housing 9 in the axial direction, with the two clutch jaws 28 and 29, which are axially and radially movable between the surfaces 24 and 25. The clutch housing 9 has a much larger inner diameter than the hollow shaft 4.

Der Backenhalter 14 besitzt für jede Kupplungsbacke 28 und 29 zwei Führungskörper 30 und 31, die als Zylinderstifte ausgebildet, quer durch die Ausnehmungen 23 hindurchgeführt und auf beiden Seiten der jeweiligen Ausnehmung 23 im Backenhalter 14 gelagert sind. Mindestens die Führungskörper 31 sind leicht aus ihren Bohrungen heraustreibbar. Dadurch sind die Führungskörper 30 und 31 beidendig eingespannt, und es entstehen zwei symmetrisch wirkende Widerlager für die Kupplungsbacken.The shoe holder 14 has two guide bodies 30 and 31 for each coupling shoe 28 and 29, which are designed as cylindrical pins, are guided transversely through the recesses 23 and are mounted on both sides of the respective recess 23 in the shoe holder 14. At least the guide bodies 31 can be easily driven out of their bores. That’s why Guide body 30 and 31 clamped at both ends, and there are two symmetrically acting abutments for the clutch shoes.

Wie aus den Figuren 3 und 4 hervorgeht, besitzen die Kupplungsbacken 28 und 29 je eine erste Schrägfläche 32 für die Anlage am ersten Führungskörper 30 und ein quer zur Hohlwelle 4 verlaufendes, durchgehendes Langloch 33, dessen eine Fläche eine zweite Schrägfläche 34 für die Anlage an dem zweiten Führungskörper 31 ist. Die beiden Schrägflächen 32 und 34 verlaufen parallel zueinander. Die Kupplungsbacken besitzen ferner zwei planparallele Seitenflächen 35 und 36, so daß sie mit Spiel in den Ausnehmungen 23 geführt sind, und eine Reibungsfläche 37 für das Zusammenwirken mit der (nicht gezeigten) Federwelle. Die Reibungsflächen 37 können eine unterschiedliche Gestalt aufweisen, so daß sie auch mit Federwellen unterschiedlicher Durchmesser zusammenwirken können.As can be seen from FIGS. 3 and 4, the clutch shoes 28 and 29 each have a first inclined surface 32 for contact with the first guide body 30 and a continuous elongated hole 33 running transversely to the hollow shaft 4, one surface of which has a second inclined surface 34 for the contact the second guide body 31. The two inclined surfaces 32 and 34 run parallel to one another. The coupling jaws also have two plane-parallel side surfaces 35 and 36, so that they are guided with play in the recesses 23, and a friction surface 37 for cooperation with the spring shaft (not shown). The friction surfaces 37 can have a different shape, so that they can also interact with spring shafts of different diameters.

Gemäß den Figuren 4 und 5 besitzen die Kupplungsbacken 28 und 29, ausgehend von ihrer Reibungsfläche 37, mittig je eine Sackbohrung 38, deren Achse 39 in Richtung der längsten Querschnittsachse des Langloches 33 verläuft und in der zwischen dem Ende des Sacklochs 38 und dem im Langloch befindlichen Führungskörper 31 eine Druckfeder 40 angeordnet ist, durch die die Kupplungsbacken 28 und 29 nach Rückzug der Steuereinrichtung 16 in ihre am weitesten geöffnete Stellung verschoben werden.According to FIGS. 4 and 5, the clutch shoes 28 and 29 each have a blind bore 38 in the center, starting from their friction surface 37, the axis 39 of which extends in the direction of the longest cross-sectional axis of the elongated hole 33 and in that between the end of the blind hole 38 and that in the elongated hole located guide body 31, a compression spring 40 is arranged, by means of which the clutch shoes 28 and 29 are moved into their most open position after the control device 16 has been withdrawn.

In den oberen Hälften der Figuren 2, 3 und 6 sind die Kupplungsbacken in einer ihrer möglichen Arbeitsstellungen gezeigt, in den unteren Hälften in der am weitesten zurückgezogenen bzw. geöffneten Stellung.In the upper halves of Figures 2, 3 and 6, the coupling jaws are shown in one of their possible working positions, in the lower halves in the most retracted or open position.

Die Steuereinrichtung 16 wirkt durch achsparallele Stößen 41 und 42 auf die Kupplungbacken 28 und 29 ein. Diese Stößel 41 und 42 sind an einem Druckring 43 befestigt, der die Hohlwelle 4 umgibt und gegen die Wirkung einer Druckfeder 44 verschiebbar ist, die sich am Kupplungsgehäuse 9 abstützt (Figur 2). Die Verschiebung geschieht unter Zwischenschaltung eines Drucklagers 45 mittels einer Schiebemuffe 46, an der die Schaltgabel 20 über eine Gelenkverbindung 47 angreift.The control device 16 acts on the clutch shoes 28 and 29 by means of axially parallel impacts 41 and 42. These plungers 41 and 42 are fastened to a pressure ring 43 which surrounds the hollow shaft 4 and is displaceable against the action of a pressure spring 44 which is supported on the clutch housing 9 (FIG. 2). The shift occurs with the interposition of a Thrust bearing 45 by means of a sliding sleeve 46 on which the shift fork 20 engages via an articulated connection 47.

Die Schaltgabel 20 ist ihrerseits mittels eines Gelenkzapfens 49 an einem Lagerbock 48 gelagert, der fest mit dem Maschinengehäuse 2 verbunden ist.The shift fork 20 is in turn mounted by means of a hinge pin 49 on a bearing block 48 which is fixedly connected to the machine housing 2.

Durch eine Schwenkbewegung der Schaltgabel mittels des Handhebels 17 im Uhrzeigersinne werden die Stößel aus der in Figur 2, unten, gezeigten Entlastungsstellung in die in Figur 2, oben, gezeigte Arbeitsstellung verschoben, wobei die Kupplungsbacken 28 und 29 aufgrund der Führungskörper 30 und 31 im Zusammenwirken mit den Schrägflächen 32 und 34 Bewegungen mit axialen und radialen Komponenten ausführen. In der Entlastungsstellung läßt sich die in Figur 3 gezeigte Baugruppe, die sogenannte Kupplungspatrone, in der bereits beschriebenen Weise aus dem Kupplungsgehäuse 9 herausnehmen und reinigen und/oder durch eine andere Kupplungspatrone (für andere Durchmesser der Federwellen) ersetzen.By pivoting the shift fork by means of the hand lever 17 in a clockwise direction, the tappets are shifted from the relief position shown in FIG. 2, below, into the working position, shown in FIG. 2, above, the clutch shoes 28 and 29 interacting due to the guide bodies 30 and 31 Carry out movements with axial and radial components with the inclined surfaces 32 and 34. In the relief position, the assembly shown in FIG. 3, the so-called clutch cartridge, can be removed from the clutch housing 9 and cleaned and / or replaced by another clutch cartridge (for different diameters of the spring shafts) in the manner already described.

Die Figuren 7 und 8, in denen gleiche Bezugszeichen verwendet werden, zeigen einen patronenförmigen Backenhalter 14 mit drei Kupplungsbacken 28, 29 und 50, die äquidistant auf dem Umfang des Backenhalters 14 angeordnet sind. Zwischen den Ausnehmungen befinden sich trogförmige Einkerbungen 51, um die Bohrungen für die stiftförmigen Führungskörper 30 und 31 leichter einbringen und die Führungskörper selbst leichter eintreiben zu können. Auch die Bajonett-Verbindung ist geändert, und es sind jetzt drei Zylinderbolzen 27 vorhanden. Notwendigerweise muß alsdann auch die Steuereinrichtung um einen weiteren Stößel ergänzt werden. Das Rohrstück 15 wurde durch eine Rändelung 15a griffiger gemacht.Figures 7 and 8, in which the same reference numerals are used, show a cartridge-shaped jaw holder 14 with three coupling jaws 28, 29 and 50, which are arranged equidistantly on the circumference of the jaw holder 14. There are trough-shaped notches 51 between the recesses in order to make the bores for the pin-shaped guide bodies 30 and 31 easier and to drive the guide bodies themselves more easily. The bayonet connection has also been changed and there are now three cylinder bolts 27. The control device must then also be supplemented by a further tappet. The pipe section 15 was made more grippy by knurling 15a.

Claims (6)

Rohrreinigungsmaschine (1) für den Antrieb von Federwellen durch eine mit einem Antriebsmotor (8) verbundene Hohlwelle (4), die in einem Maschinengehäuse (2) gelagert ist und auf eine Rotationskupplung (13) mit mindestens zwei Kupplungsbacken (28, 29) einwirkt, die radial und axial beweglich in von parallelen Flächen (24, 25) begrenzten Ausnehmungen (23) eines mit der Hohlwelle (4) drehbaren Backenhalters (14) gelagert sind und unter dem Einfluß einer Steuereinrichtung (16) an die Federwelle anpreßbar sind dadurch gekennzeichnet, daß die Hohlwelle (4) an ihrem einen Ende verdrehfest mit einem auf dem Umfang zumindest im wesentlichen geschlossenen Kupplungsgehäuse (9) größeren Innendurchmessers verbunden ist als der Innendurchmesser der Hohlwelle (4) und daß der Backenhalter (14) mit den Kupplungsbacken (28, 29) verdrehfest, aber in axialer Richtung herausnehmbar in dem Kupplungsgehäuse (9) gelagert ist.Pipe cleaning machine (1) for driving spring shafts through a hollow shaft (4) connected to a drive motor (8), which is mounted in a machine housing (2) and acts on a rotary clutch (13) with at least two clutch shoes (28, 29), which are radially and axially movable in recesses (23) of a jaw holder (14) rotatable with the hollow shaft (4) and delimited by parallel surfaces (24, 25) and can be pressed against the spring shaft under the influence of a control device (16), that the hollow shaft (4) is non-rotatably connected at one end to a clutch housing (9) which is at least substantially closed on the circumference and has a larger inner diameter than the inside diameter of the hollow shaft (4) and that the jaw holder (14) is connected to the clutch jaws (28, 29 ) is mounted in the clutch housing (9) in a torsion-proof but removable manner in the axial direction. Rohrreinigungsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Backenhalter (14) durch eine Bajonett-Verbindung (21) im Kupplungsgehäuse (9) festlegbar ist.Pipe cleaning machine according to claim 1, characterized in that the jaw holder (14) can be fixed in the coupling housing (9) by a bayonet connection (21). Rohrreinigungsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Kupplungsgehäuse (9) zumindest auf dem größten Teil seiner Länge im Maschinengehäuse (2) untergebracht ist.Pipe cleaning machine according to claim 1, characterized in that the coupling housing (9) is accommodated in the machine housing (2) at least over most of its length. Rohrreinigungsmaschine nach Anspruch 3, dadurch gekennzeichnet, daß mindestens ein Drehlager (11) zwischen dem Kupplungsgehäuse (9) und dem Maschinengehäuse (2) angeordnet ist.Pipe cleaning machine according to claim 3, characterized in that at least one rotary bearing (11) is arranged between the coupling housing (9) and the machine housing (2). Rohrreinigungsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß a) der Backenhalter (14) für jede Kupplungsbacke (28, 29) zwei Führungskörper (30, 31) aufweist, die quer durch die Ausnehmungen (23) hindurchgeführt und auf beiden Seiten der jeweiligen Ausnehmung (23) im Backenhalter (14) gelagert sind, b) die Kupplungsbacken (28, 29) je eine erste Schrägfläche (32) für die Anlage am ersten Führungskörper (30) und ein quer zur Hohlwelle (4) verlaufendes, durchgehendes Langloch (33) aufweisen, dessen eine Fläche eine zweite Schrägfläche (34) für die Anlage an dem zweiten Führungskörper (31) ist, wobei die beiden Schrägflächen (32, 34) parallel zueinander verlaufen, und c) die Steuereinrichtung (16) durch achsparallele Stößel (41, 42) auf die Kupplungsbacken (28, 29) einwirkt. Pipe cleaning machine according to claim 1, characterized in that a) the jaw holder (14) for each coupling jaw (28, 29) has two guide bodies (30, 31) which are guided transversely through the recesses (23) and are mounted on both sides of the respective recess (23) in the jaw holder (14) , b) the coupling jaws (28, 29) each have a first inclined surface (32) for contacting the first guide body (30) and a continuous elongated hole (33) running transversely to the hollow shaft (4), one surface of which has a second inclined surface (34 ) for contact with the second guide body (31), the two inclined surfaces (32, 34) running parallel to one another, and c) the control device (16) acts on the coupling shoes (28, 29) by means of axially parallel plungers (41, 42). Rohrreinigungsmaschine nach Anspruch 5, dadurch gekennzeichnet, daß die Kupplungsbacken (28, 29), ausgehend von ihrer Reibungsfläche (37), mittig je eine Sackbohrung (38) aufweisen, deren Achse in Richtung der längsten Querschnittsachse des Langlochs (33) verläuft und in der zwischen dem Ende der Sackbohrung (38) und dem im Langloch befindlichen Führungskörper (31) eine Druckfeder (40) angeordnet ist, durch die die Kupplungsbacke (28, 29) nach Rückzug der Steuereinrichtung (16) in ihre am weitesten geöffnete Stellung verschiebbar ist.Pipe cleaning machine according to claim 5, characterized in that, starting from their friction surface (37), the coupling jaws (28, 29) each have a blind bore (38) in the center, the axis of which extends in the direction of the longest cross-sectional axis of the elongated hole (33) and in which Between the end of the blind bore (38) and the guide body (31) located in the elongated hole, a compression spring (40) is arranged, by means of which the coupling jaw (28, 29) can be displaced into its most open position after the control device (16) has been withdrawn.
EP96101163A 1995-02-02 1996-01-28 Pipe cleaning machine for driving cleaning snakes Expired - Lifetime EP0724916B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19503276 1995-02-02
DE19503276A DE19503276C1 (en) 1995-02-02 1995-02-02 Drive device for spring shaft of pipe cleaning machine

Publications (2)

Publication Number Publication Date
EP0724916A1 true EP0724916A1 (en) 1996-08-07
EP0724916B1 EP0724916B1 (en) 1998-11-04

Family

ID=7752934

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Application Number Title Priority Date Filing Date
EP96101163A Expired - Lifetime EP0724916B1 (en) 1995-02-02 1996-01-28 Pipe cleaning machine for driving cleaning snakes

Country Status (7)

Country Link
US (1) US5603136A (en)
EP (1) EP0724916B1 (en)
JP (1) JPH08318238A (en)
AT (1) ATE172896T1 (en)
AU (1) AU692646B2 (en)
DE (2) DE19503276C1 (en)
ES (1) ES2125066T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107202091A (en) * 2016-03-18 2017-09-26 里奇工具公司 Motor damper and power train for pipe running tool

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6076219A (en) * 1999-01-15 2000-06-20 Irwin; Lawrence F. Waste line clean out apparatus
US6546582B2 (en) * 2001-06-18 2003-04-15 Lee H. Silverman Drain cleaning machine and adjustable collet chuck mechanism therefor
DE202015000547U1 (en) 2015-01-27 2015-03-12 Ooo Gazpron Transgaz Sankt Petersburg System for arc-plasma cleaning of the outer surface of pipelines (plant for cleaning the outer surface of pipelines using the arc-plasma method)
DE202015009154U1 (en) 2015-10-21 2016-12-08 OOO Gazprom transgaz Sankt Petersburg Apparatus for arc plasma surface cleaning of metal products and a device therefor
DE202016008318U1 (en) 2016-04-08 2017-07-21 Andrey Senokosov Machine for plasma cleaning of pipe exterior surfaces
EP3833493A4 (en) * 2018-08-10 2022-12-07 Milwaukee Electric Tool Corporation Drain cleaning machine
CN216586960U (en) 2019-05-15 2022-05-24 米沃奇电动工具公司 Drain pipe cleaning device
EP4038737A4 (en) 2019-09-30 2023-11-01 Milwaukee Electric Tool Corporation Motor control of a drain cleaning machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714124A1 (en) * 1977-03-30 1978-10-12 Horst Kluender Drive mechanism for pipe cleaning equipment
NL8500014A (en) * 1985-01-04 1986-08-01 Rior B V Helical spring drive for pipe bore cleaning - has spring guide mechanism with spring covered by protective hose and safety cap covering hand operated clamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318172A (en) * 1939-07-22 1943-05-04 Long Hugh Universal tool
US2940099A (en) * 1956-01-26 1960-06-14 Karl J Kollmann Sewer cleaner
US3213473A (en) * 1963-09-03 1965-10-26 Singer Louis Pipe cleaning device
DE2613944C3 (en) * 1976-04-01 1981-07-23 Rowo Rohrwolf Produktions Ag Und Co Vertriebs Kg, 3436 Hessisch Lichtenau Portable pipe cleaning device with a wire spiral that can be rotated
DE3109876A1 (en) * 1981-03-14 1982-09-30 Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt PIPE CLEANING MACHINE WITH A CONTAINER FOR RECEIVING CLEANING SPIRALS OF DIFFERENT DIAMETERS
DE9110901U1 (en) * 1991-09-03 1992-01-02 Horst Kluender Gmbh, 6367 Karben, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714124A1 (en) * 1977-03-30 1978-10-12 Horst Kluender Drive mechanism for pipe cleaning equipment
NL8500014A (en) * 1985-01-04 1986-08-01 Rior B V Helical spring drive for pipe bore cleaning - has spring guide mechanism with spring covered by protective hose and safety cap covering hand operated clamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107202091A (en) * 2016-03-18 2017-09-26 里奇工具公司 Motor damper and power train for pipe running tool
CN107202091B (en) * 2016-03-18 2020-01-07 里奇工具公司 Motor damper and drive train for a pipe running tool
US10851868B2 (en) 2016-03-18 2020-12-01 Ridge Tool Company Motor dampener and drive train for plumbing tools
US11815152B2 (en) 2016-03-18 2023-11-14 Ridge Tool Company Motor dampener and drive train for plumbing tools

Also Published As

Publication number Publication date
EP0724916B1 (en) 1998-11-04
ATE172896T1 (en) 1998-11-15
AU4218696A (en) 1996-08-08
US5603136A (en) 1997-02-18
JPH08318238A (en) 1996-12-03
DE59600748D1 (en) 1998-12-10
AU692646B2 (en) 1998-06-11
DE19503276C1 (en) 1996-04-25
ES2125066T3 (en) 1999-02-16

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