EP0724916B1 - Pipe cleaning machine for driving cleaning snakes - Google Patents

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

The invention relates to a pipe cleaning machine for driving Spring shafts through a hollow shaft connected to a drive motor, the is stored in a machine housing and with a rotary clutch acts at least two clutch shoes that are radially and axially movable in recesses delimited by parallel surfaces, one with the hollow shaft rotatable jaw holder are stored and under the influence of a control device are pressed against the spring shaft.

Pipe cleaning machines of this type with two coupling jaws are through DE-PS 27 14 124 known. The so-called spring shafts are also known, which are relatively torsionally stiff but otherwise flexible Coil springs, several of which are specially trained Couplings strung together through the hollow shaft of the pipe cleaning machine can be passed through. At the very front Various cleaning tools can be attached to the end of these spring shafts be used for boring or cutting impurities serve in pipelines that can have a very tortuous course. These tools include, for example, cross-blade drills, ring saws, Slingshot chains, milling heads, etc. It is also possible through the spring shafts Pass pressure hoses through so that in the area of the cleaning tool an additional rinsing effect can be generated.

The handling of such pipe cleaning machines and spring shafts sets a great skill of the operator ahead, through input and Switching off the engine and the friction clutch as well as if necessary also by alternating reversal of the direction of rotation Must influence cleaning tool so that this the necessary Feed in the pipeline, but does not get stuck. Except The operator must control the pipe cleaning machine also influence the spring shaft by hand. For this the spring shaft at the front end of the pipe cleaning machine and before entering the pipe runs in an arc, on which the operator one Exerts pressure in the direction of shortening the arch. As a result, the Operator has a feeling for how the cleaning tool works. Since the operator has a hand on the control lever Pipe cleaning machine must be manipulation on the said bow of the spring shaft in the immediate vicinity of the performed at the front of the machine. Coupling further spring shafts happens at the rear end of the machine.

In the pipe cleaning machine according to DE-PS 27 14 124, the jaw holder rigidly connected to the hollow shaft and by means of this outside the Machine housing overhung. To accommodate the clutch shoes the jaw holder has two approximately rectangular recesses, in two clutch shoes diametrically opposite to the axis of rotation are arranged over two parallel inclined surfaces with crossbars on the one hand and axially movable plungers on the other hand, a radial movement by implementing an axial movement run through which the clutch shoes engage in a frictional engagement the spring shaft are brought. This flying storage has the purpose remove the clutch shoes individually without further disassembly and to be able to clean or replace.

However, removing and inserting the clutch shoes requires some Dexterity and also a great deal of attention if too a pipe cleaning machine for different diameters of the spring shafts also different clutch shoes belong that do not belong to each other may be confused, but largely the same outer contours exhibit. Removing and inserting the clutch shoes is only possible with the help of a swivel movement, and the clutch shoes must also prevent centrifugal forces from flying out be secured. Easy expansion on the one hand and securing against centrifugal forces on the other hand are difficult to combine and the known clutch shoes have lugs or Protrusions that engage behind the actuators tappets. While inclined planes are provided for the first inclined surfaces second inclined surfaces by inclined longitudinal grooves in each only a side wall of the clutch shoes formed so that one-sided by this Leadership forces are generated which cause the clutch shoes to tilt at least promote. There is a major problem with the known solution but in that the overhung jaw holder due to its sharp Corners and edges that protrude considerably from the machine housing, one represents a certain danger for the operator, since there are objects in the relatively jagged surface of the jaw holder Can catch rotation. In practice, a protective housing is included making it difficult to replace the individual clutch shoes becomes. In addition, the operator can unscrew the Refrain from protective housing!

Through US-PS 2 940 099 is another type of pipe cleaning machine known, in which the hollow shaft inside the machine housing divided and with the ends of the shaft parts facing each other Hollow tapered surfaces is provided, which is a set of three clutch shoes enclose between themselves. These are complementary at both ends Sector surfaces of a full cone are provided and are only by the hollow cone surfaces and held together a set of tangential compression springs. The rotary clutch is actuated by pushing the Shaft parts. There is no special jaw holder. Here is the Hollow shaft not sealed against the machine housing, and for The machine housing must be replaced and cleaned opened or disassembled and cleaned if necessary.

The invention is therefore based on the object of a pipe cleaning machine to specify the genus described at the beginning, in which from the Rotating parts protruding from the machine housing are not in contact with others Can catch objects and where the clutch shoes to Not individually handled for cleaning and / or replacement Need to become.

The solution to the problem is the one described at the beginning Pipe cleaning machine according to the invention in that the hollow shaft one end twist-proof with a circumference at least in essentially closed clutch housing of larger inner diameter is connected as the inner diameter of the hollow shaft and that the Jaw holder with the coupling jaws non-rotatable, but in the axial direction is removably mounted in the clutch housing.

Due to the feature of unification of the hollow shaft with one on the circumference essentially closed clutch housing is first of all creates a smooth revolving surface that is also opposite the Machine housing could be overhung - but not necessarily - without this endangers the environment. By the characteristic of Removability of the jaw holder with the clutch jaws remain these are combined with the jaw holder, so that confusion is impossible is made as long as the clutch shoes with the shoe holder stay united. Nevertheless, the jaw holder can be used with the clutch jaws easy to clean with a water jet, inspect and without time-consuming Reinstate measures or manipulations.

The jaw holders with the clutch jaws have, so to speak the shape and characteristics of a "coupling cartridge", and the operator Such a pipe cleaning machine can be a whole range of Carry clutch cartridges with you, their connection dimensions on the clutch housing one and the same pipe cleaning machine are coordinated, so that it is simply pulling such a cartridge out of the clutch housing and the replacement by another cartridge is required in order to pipe cleaning machine concerned to a different diameter of the Convert spring shafts. Through the fixed connection of the clutch housing with the hollow shaft with a smaller inner diameter is achieved at the same time that no impurities from the spring shaft be dragged into the machine can penetrate.

A particularly easy to release and restore connection of the The jaw holder in the clutch housing consists in the use of a known one Bayonet connection.

It is special in the course of a further embodiment of the invention advantageous if the clutch housing with the jaw holder at least most of its length is housed in the machine housing what also by a protruding part attached to the machine housing Collar can happen. This puts the operator at risk excluded by a component rotating at high speed.

It is also advantageous if at least one pivot bearing for the hollow shaft arranged between the clutch housing and the machine housing is. In this way, flying storage of the jaw holder is avoided and suppresses a tendency to vibrate.

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 for each coupling jaw has two guide bodies 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 contact with the first guide body and a continuous slot extending transversely to the hollow shaft, one surface of which is a second inclined surface for contact with 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).

In this way, perfect parallel guidance without a tendency to tilt the clutch shoe creates, resulting movement, which consists of an axial movement and a radial movement of the Coupling shoes assembled, the radial movement the actual Entrainment of the spring shaft caused by frictional forces.

Furthermore, these constructive measures ensure that the Coupling jaws do not easily come out of the jaw holder by centrifugal forces can fly out. The second guide body is namely passed through the respective clutch shoe and at both ends in Jaw holder stored. If the clutch shoe is to be replaced, so it is easily possible to use the second guide body as Dowel pin or grooved pin can be made from its two Drill out holes, after which the clutch shoe by a slight Swivel movement can be removed from the jaw holder can. But this does not cause any difficulties, since the jaw holder is with the clutch shoes as a whole from the clutch housing in the form of a cartridge is taken out.

It is finally in the course of yet another embodiment of the invention possible with particular advantage if the clutch shoes, starting have a blind hole in the middle of their friction surface, whose axis in the direction of the longest cross-sectional axis of the elongated hole runs and in between the end of the blind hole and that in the slot located guide body a compression spring is arranged through which Coupling shoe after retracting the control device into its farthest open position is moved. This central arrangement of the Compression springs generate absolutely symmetrical forces that tend to tilt the coupling jaws between the parallel walls of the recesses prevent in the jaw holder. The compression spring is also protected and is as long as possible between the clutch shoe and the Guide body included as long as it is not removed. Thereby, that the central hole for the compression spring from the friction surface goes out, this compression spring can be installed and removed through the friction surface as long as the guide body is not inserted. After insertion of the guide body but the compression spring is captive and protected captured.

Two embodiments of the subject matter of the invention are as follows with reference to Figures 1 to 8 explained in more detail.

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 Figure 1, a pipe cleaning machine 1 is shown, to which a Machine housing 2 belongs that from a frame or a central frame and two lids, which are not shown in detail here or are decreased. The machine housing 2 is equipped with casters 3. Inside the machine housing 2 is a hollow shaft 4 with a horizontal axis of rotation A-A arranged near its front End is mounted in a bearing block 5 with a roller bearing 6. The drive the hollow shaft 4 is by a belt drive 7 and an electric drive motor 8 causes. Power connections, switches etc. are indicative shown, but not numbered in detail, since these furnishings to State of the art belong.

At the rear end, the hollow shaft 4 is non-rotatable with a clutch housing 9 provided, so to speak, an extension of the hollow shaft 4th represents, but has a significantly larger inner diameter than that Hollow shaft 4 itself. This clutch housing is at least on the circumference essentially closed and delimited by two stepped cylinder surfaces, the larger of which has a support shoulder 10 for two roller bearings 11 forms over which the clutch housing 9 and thus the other end of the Support the hollow shaft 4 in the machine housing 2. This has on the perimeter of the clutch housing 9 or from its support shoulder 10 a protruding annular collar 12, which the operator before any accidental Contact with the clutch housing 9 protects. Through this Collar 12 is the clutch housing 9 with its support shoulder 10 on it entire length housed in the machine housing 2.

The clutch housing 9 forms in cooperation with those below Installation parts described in more detail, a rotary clutch 13, whose jaw holder 14 only a short pipe section 15 is visible, which as Handle for removing the jaw holder, but no surface irregularities possesses that to catch 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 Figure 2. To the control device 16 includes an angled hand lever 17, only a portion of which is shown, and through a bellows 18 into the machine housing 2 is introduced. By moving the hand lever 17 up and down in the direction the double arrow 19, the rotary clutch 13 can be controlled, namely for this purpose the hand lever 17 is connected to a shift fork 20 which is located inside the machine housing 2.

Figure 2 shows the manner in which the hollow shaft 4 with the as a body of revolution trained coupling housing 9 is connected, namely by a shrink fit. The clutch housing has graduated inner and outer cylinder surfaces and is a multi-part bayonet connection 21 releasably connected to the jaw holder 14.

According to FIGS. 3 and 6, the jaw holder 14 has a main part 22, in which are two radial recesses 23, the parallel Areas 24 and 25 are limited. The cohesion takes place via a closed Ring part 26, in which there are cylindrical pins 27, the parts of the Bayonet connection 21 are. By pushing in, turning and pulling out by means of the pipe section 15, the jaw holder 14 can be moved in the axial direction take it out of the clutch housing 9 with the two Coupling shoes 28 and 29 which are axially and radially movable between the Surfaces 24 and 25 are guided. The clutch housing 9 has a much larger inside diameter than the hollow shaft 4.

The jaw holder 14 has two guide bodies for each clutch shoe 28 and 29 30 and 31, which are designed as cylindrical pins, across the recesses 23 passed and on both sides of the respective recess 23 are mounted in the jaw holder 14. At least the guide body 31 are easy to drive out of their holes. That’s why Guide body 30 and 31 clamped at both ends, and there are two symmetrically acting abutments for the clutch shoes.

As can be seen from FIGS. 3 and 4, the clutch shoes 28 have and 29 each have a first inclined surface 32 for contact with the first guide body 30 and a continuous slot extending transversely to the hollow shaft 4 33, one surface of which a second inclined surface 34 for the system the second guide body 31. The two inclined surfaces 32 and 34 run parallel to each other. The clutch shoes also have two plane-parallel side surfaces 35 and 36 so that they with play in the recesses 23 are guided, 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 also with spring shafts different diameters can work together.

According to FIGS. 4 and 5, the clutch shoes 28 and 29 have a starting point from its friction surface 37, in the middle a blind bore 38, the Axis 39 in the direction of the longest cross-sectional axis of the elongated hole 33 runs and in between the end of the blind hole 38 and that in the elongated hole located guide body 31, a compression spring 40 is arranged, through which the clutch shoes 28 and 29 after withdrawal of the control device 16 are moved to their most open position.

In the upper halves of Figures 2, 3 and 6, the clutch shoes are in one of their possible working positions shown in the lower halves in the most retracted or open position.

The control device 16 acts on the axially parallel plungers 41 and 42 Coupling shoes 28 and 29. These plungers 41 and 42 are on one Pressure ring 43 attached, which surrounds the hollow shaft 4 and against the action a compression spring 44 is slidable, which is supported on the clutch housing 9 (Figure 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 over a joint 47 engages.

The shift fork 20 is in turn by means of a pivot pin 49 on one Bearing bracket 48 is mounted, which is fixedly connected to the machine housing 2.

By pivoting the shift fork by means of the hand lever 17 in The plungers turn clockwise from the relief position shown in FIG. 2, below moved into the working position shown in FIG. 2, above, the clutch shoes 28 and 29 due to the guide body 30 and 31 in cooperation with the inclined surfaces 32 and 34 movements Execute axial and radial components. Leaves in the relief position 3, the so-called clutch cartridge, in remove it from the clutch housing 9 in the manner already described and clean and / or by another clutch cartridge (for other diameters of the spring shafts).

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 are. There are trough-shaped notches between the recesses 51 to the holes for the pin-shaped guide body 30 and 31 insert easier and drive in the guide body itself easier can. The bayonet connection has also changed, and there are now three Cylinder bolts 27 available. Then, necessarily Control device can be supplemented by another plunger. The pipe piece 15 was made more grippy by knurling 15a.

Claims (6)

1. Pipe cleaning machine (1) for driving cleaning spirals through a hollow shaft (4), which is connected to a drive motor (8), is disposed in a machine housing (2) and acts on a rotary clutch (13) with at least two clutch cheeks (28, 29), which are disposed to be radially and axially movable in recesses (23) defined by parallel faces (24, 25) of a cheek holder (14) rotatable with the hollow shaft (4), and may be pressed onto the cleaning spiral under the action of a control means (16), characterised in that the hollow shaft (4) is connected against relative rotation at its one end to a clutch housing (9) at least essentially closed on the circumference and having a larger inside diameter than the inside diameter of the hollow shaft (4), and that the cheek holder (14) is disposed in the clutch housing (9) so as to be fixed against relative rotation with the clutch cheeks (28, 29) but removable in axial direction.
2. Pipe cleaning machine according to Claim 1, characterised in that the cheek holder (14) may be fixed in the clutch housing (9) by means of a bayonet-type connection (21).
3. Pipe cleaning machine according to Claim 1, characterised in that the clutch housing (9) is housed in the machine housing (2) at least on the largest portion of its length.
4. Pipe cleaning machine according to Claim 3, characterised in that at least one rotary bearing (11) is arranged between the clutch housing (9) and the machine housing (2).
5. Pipe cleaning machine according to Claim 1, characterised in that

   a) the cheek holder (14) has two guide members (30, 31) for each clutch cheek (28, 29) which are passed transversely through the recesses (23) and are disposed in the cheek holder (14) on both sides of the respective recess (23),

   b) the clutch cheeks (28, 29) each have a first inclined face (32) for abutment against the first guide member (30) and a continuous elongated hole (33) running transversely to the hollow shaft (4), one face of said elongated hole having a second inclined face (34) for abutment against the second guide member (31), whereby the two inclined faces (32, 34) run parallel to one another, and

   c) the control means (16) acts on the clutch cheeks (28, 29) through axis-parallel rams (41, 42).
6. Pipe cleaning machine according to Claim 5, characterised in that, starting from their friction surface (37), the clutch cheeks (28, 29) each have a blind hole (38) in the centre, the axis of which runs in the direction of the longest cross-sectional axis of the elongated hole (33), and in which a pressure spring (40) is arranged between the end of the blind hole (38) and the guide member (31) located in the elongated hole, said pressure spring enabling the clutch cheek (28, 29) to be displaced into the position where it is open at its widest after the control means (16) has been drawn back.

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