EP0446690B1 - Coupling for bottom rollers in drafting arrangements of spinning machines - Google Patents

Coupling for bottom rollers in drafting arrangements of spinning machines Download PDF

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Publication number
EP0446690B1
EP0446690B1 EP19910102683 EP91102683A EP0446690B1 EP 0446690 B1 EP0446690 B1 EP 0446690B1 EP 19910102683 EP19910102683 EP 19910102683 EP 91102683 A EP91102683 A EP 91102683A EP 0446690 B1 EP0446690 B1 EP 0446690B1
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EP
European Patent Office
Prior art keywords
bottom roller
bore
rollers
shaft section
lower roller
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.)
Expired - Lifetime
Application number
EP19910102683
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German (de)
French (fr)
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EP0446690A1 (en
Inventor
Hansrudolf Baur
Hans Flatz
Heinz Kündig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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Filing date
Publication date
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Publication of EP0446690A1 publication Critical patent/EP0446690A1/en
Application granted granted Critical
Publication of EP0446690B1 publication Critical patent/EP0446690B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D01H5/82—Arrangements for coupling roller sections

Definitions

  • the invention relates to a roller clutch according to the preamble of claim 1.
  • Bottom rollers are used in spinning machines together with pressure rollers for the transport and stretching of slivers made of textile material.
  • Bottom rollers and pressure rollers together form the so-called drafting system of the spinning machine, in which the fuses are stretched before they reach the actual spinning position.
  • Such an arrangement is known, for example, from DE-A-2439333, it being possible for the zones for the transport of the fuse to be corrugated or sandblasted.
  • the ends of a lower roller are designed as coupling halves for an adjacent end of a further lower roller.
  • Spinning machines can be of considerable length, and a large number of coaxially coupled lower rollers can be provided. It is customary to provide the lower roller ends with an external thread and on the other side with an internal thread, with an external thread of one lower roller end then being screwed into the internal thread of an adjacent lower roller end during assembly. The pitches of the threads are set in such a way that the thread connections do not come loose when the drive power is transferred from one lower roller to the neighboring lower roller, but can only tighten.
  • a shaft section is provided which calibrates one Diameter or a calibrated bore. These shaft sections with the calibrated dimensions, which are coordinated with one another, are intended to center the adjacent lower rolls relative to one another, ie to ensure that the lower rolls run coaxially.
  • the lower roller 1 according to FIG. 1 is shown interrupted.
  • six or eight so-called claws 12 can be arranged on a lower roller 1, these are lower roller sections which preferably have corrugations on their circumference. Between the individual claws 12 there are other sections 11 with a smooth surface.
  • the left lower roller end 14 forms a coupling half for an adjacent lower roller 1 ', the right lower roller end 15 of which is designed like the lower roller end 15 of the lower roller 1.
  • the left lower roller end 14 according to the invention has three bores 141, 142, 143 with the diameters A1, F1 and B1.
  • the diameters A1 and B1 are diameters with a narrow tolerance, while the bore 142 with the diameter F1 is preferably designed as a thread.
  • the diameter B1 is smaller than the diameter F1 of the bore 142 and that the bore 142 is larger than the thread diameter of the bore 142.
  • the right lower roller end 15 is designed accordingly.
  • the shaft sections 151, 152, 153 with the diameters A2, F2, B2 are designed to match the corresponding bores in the left lower roller end 14. Accordingly, the diameter A2 of the shaft section 151 fits exactly into the diameter A1 of the bore 141, the diameter F2 of the shaft section 152 is designed as a thread corresponding to the bore 142, and the diameter B2 of the shaft section 153 finally fits exactly into the bore 143 with the diameter B1.
  • the shaft section 152 can also be designed such that it forms a section of a splined shaft.
  • the bore 142 must also have grooves at the other end of the lower roller. 1
  • a roller bearing 13 is shown schematically to the left of the shaft section 151 with the diameter A2, the inner ring 130 of FIG. 2 of which is also seated on the extension of the shaft section 151 with the diameter A2.
  • Fig. 2 the screwed lower roller ends 14 and 15 can be seen.
  • the shaft portion 151 is located in the bore 141 and is centered, the shaft portion 152 with the external thread is located in the bore 142 with the internal thread, and the shaft portion 153 is centered in the bore 143 of the left lower roller end 14 of the lower roller 1.
  • the other right lower roller end 15 from FIG. 2 belongs to the adjacent lower roller 1 '.
  • the diameters A1 and A2 thus together form part of the centering of the two adjacent lower rolls 1 and 1 ', the diameters B1 and B2 form the other part of the centering of both lower rolls 1 and 1', and in between there is the positive connection of the two lower rolls 1 and 1 ' at shaft section 152 and in bore 142.
  • centering lengths L1 are according to a prior art design and L2 according to the solution of the invention. If, according to the prior art, the shaft section 153 is not present, only the length L1 is available for centering the left lower roller end 14 with respect to the right lower roller end 15. As can be seen from FIG. 2, by adding the shaft section 153 to the right lower roll end 15 and providing the calibrated bore 143 in the left lower roll end 14 with the length L3 of the shaft section 151, the guide length L2 over which the two lower roll ends are guided together according to the invention compared to the prior art, if you consider the representation in Fig. 2 as to scale, about fourfold.
  • This substantially increased guide length L2 of the lower rollers 1 and 1 'into one another improves the alignment and stability of the lower rollers to such an extent that after assembly by screwing together, a message from the coupled lower rollers 1 and 1' can generally be omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die Erfindung betrifft eine Walzenkupplung gemäss Oberbegriff des Anspruches 1.The invention relates to a roller clutch according to the preamble of claim 1.

Unterwalzen werden in Spinnmaschinen zusammen mit Andrückrollen zum Transport und zum Strecken von Lunten aus textilem Material verwendet. Unterwalzen und Andrückrollen bilden zusammen das sogenannte Streckwerk der Spinnmaschine, in dem die Lunten gestreckt werden, bevor sie an die eigentliche Spinnstelle gelangen. Eine derartige Anordnung ist beispielsweise aus der DE-A-2439333 bekannt, wobei die Zonen für den Weitertransport der Lunte geriffelt oder sandgestrahlt ausgebildet sein können. Die Enden einer Unterwalze sind bei Spinnmaschinen als Kupplungshälften für jeweils ein benachbartes Ende einer weiteren Unterwalze ausgebildet. Jeweils an einem Ende einer Unterwalze innerhalb einer Spinnmaschine befindet sich in der Regel ein Wälzlager, mittels dessen die Unterwalze im Gestell der Spinnmaschine abgestützt ist. Spinnmaschinen können eine beträchtliche Länge erreichen, wobei eine Vielzahl von koaxial zusammengekuppelten Unterwalzen vorgesehen sein kann. Es ist üblich, die Unterwalzenenden jeweils mit einem Aussengewinde und auf der anderen Seite mit einem Innengewinde zu versehen, wobei dann bei der Montage jeweils ein Aussengewinde eines Unterwalzenendes in das Innengewinde eines benachbarten Unterwalzenendes eingeschraubt wird. Die Steigungen der Gewinde sind so gelegt, dass sich die Gewindeverbindungen bei der Uebertragung der Antriebsleistung von einer Unterwalze auf die benachbarte Unterwalze nicht lösen, sondern nur zusätzlich festziehen können. Jeweils neben einem Aussen- oder Innengewinde eines Unterwalzenendes der gattungsgemässen Art ist ein Wellenabschnitt vorgesehen, der einen kalibrierten Durchmesser bzw. eine kalibrierte Bohrung aufweist. Diese Wellenabschnitte mit den kalibrierten Abmessungen, die aufeinander abgestimmt sind, sollen die benachbarten Unterwalzen zueinander zentrieren, d.h. sicherstellen, dass die Unterwalzen koaxial verlaufen.Bottom rollers are used in spinning machines together with pressure rollers for the transport and stretching of slivers made of textile material. Bottom rollers and pressure rollers together form the so-called drafting system of the spinning machine, in which the fuses are stretched before they reach the actual spinning position. Such an arrangement is known, for example, from DE-A-2439333, it being possible for the zones for the transport of the fuse to be corrugated or sandblasted. In spinning machines, the ends of a lower roller are designed as coupling halves for an adjacent end of a further lower roller. There is usually a roller bearing at each end of a lower roller within a spinning machine, by means of which the lower roller is supported in the frame of the spinning machine. Spinning machines can be of considerable length, and a large number of coaxially coupled lower rollers can be provided. It is customary to provide the lower roller ends with an external thread and on the other side with an internal thread, with an external thread of one lower roller end then being screwed into the internal thread of an adjacent lower roller end during assembly. The pitches of the threads are set in such a way that the thread connections do not come loose when the drive power is transferred from one lower roller to the neighboring lower roller, but can only tighten. In addition to an external or internal thread of a lower roller end of the generic type, a shaft section is provided which calibrates one Diameter or a calibrated bore. These shaft sections with the calibrated dimensions, which are coordinated with one another, are intended to center the adjacent lower rolls relative to one another, ie to ensure that the lower rolls run coaxially.

Für einen gleichmässigen Transport bzw. Verzug des Streckenbandes aus textilem Material ist es unerlässlich, dass die Unterwalzen möglichst rund laufen. Erfahrungsgemäss kann aber bei bekannten Unterwalzen mit üblichen Toleranzen das erforderliche Rundlaufmass nicht erreicht werden, weshalb miteinander gekuppelte Unterwalzen bei der Montage innerhalb oder ausserhalb der Spinnmaschine nachgerichtet werden müssen. Diese Operation ist zeitaufwendig und verlangt vom Montagepersonal grosse Erfahrung, damit die erforderliche Rundlaufgenauigkeit der Unterwalzen erreicht wird. Beim Ersatz einer Unterwalze in einer Spinnmaschine, wenn die Unterwalze beispielsweise beschädigt ist, muss die Richtoperation von neuem durchgeführt werden.For even transport or warping of the conveyor belt made of textile material, it is essential that the bottom rollers run as smoothly as possible. Experience has shown, however, that the required concentricity cannot be achieved with known lower rollers with usual tolerances, which is why the lower rollers coupled to one another must be adjusted during assembly inside or outside the spinning machine. This operation is time-consuming and requires a great deal of experience from the assembly personnel in order to achieve the required concentricity of the lower rollers. When replacing a lower roller in a spinning machine, for example if the lower roller is damaged, the straightening operation must be carried out again.

Es ist Aufgabe der vorliegenden Erfindung, eine Spinnmaschine mit Unterwalzen zu schaffen, bei der die Rundlaufgenauigkeit der gekuppelten Unterwalzen soweit verbessert ist, dass keine Richtoperationen mehr nötig sind. Diese Aufgabe wird erfindungsgemäss durch die Merkmale im Kennzeichen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen des allgemeinen Erfindungsgedankens sind in den Unteransprüchen festgehalten.It is an object of the present invention to provide a spinning machine with lower rollers, in which the concentricity of the coupled lower rollers is improved to such an extent that straightening operations are no longer necessary. According to the invention, this object is achieved by the features in the characterizing part of claim 1. Advantageous developments of the general inventive concept are set out in the subclaims.

Im folgenden wird die Erfindung anhand der Figuren im einzelnen beschrieben.The invention is described in detail below with reference to the figures.

Es zeigen:

Fig. 1
eine Ansicht einer Unterwalze gemäss der Erfindung,
Fig. 2
die Enden zweier Unterwalzen im gekuppelten Zustand.
Show it:
Fig. 1
a view of a lower roller according to the invention,
Fig. 2
the ends of two lower rollers in the coupled state.

Die Unterwalze 1 gemäss Fig. 1 ist unterbrochen dargestellt. Auf einer Unterwalze 1 können beispielsweise sechs oder acht sogenannte Krallen 12 angeordnet sein, das sind Unterwalzenabschnitte, die bevorzugt eine Riffelung an ihrem Umfang aufweisen. Zwischen den einzelnen Krallen 12 sind andere Abschnitte 11 mit glatter Oberfläche. Das linke Unterwalzenende 14 bildet eine Kupplungshälfte für eine benachbarte Unterwalze 1', deren rechtes Unterwalzenende 15 wie das Unterwalzenende 15 der Unterwalze 1 ausgeführt ist. Das linke Unterwalzenende 14 gemäss der Erfindung weist drei Bohrungen 141, 142, 143 auf mit den Durchmessern A1, F1 und B1. Die Durchmesser A1 und B1 sind Durchmesser mit einer engen Toleranz, während die Bohrung 142 mit dem Durchmesser F1 bevorzugt als Gewinde ausgeführt ist. Es versteht sich von selbst, dass der Durchmesser B1 kleiner als der Durchmesser F1 der Bohrung 142 ist und dass die Bohrung 142 grösser als der Gewindedurchmesser der Bohrung 142 ist. Entsprechend ist das rechte Unterwalzenende 15 gestaltet. Die Wellenabschnitte 151, 152, 153 mit den Durchmessern A2, F2, B2 sind passend zu den entsprechenden Bohrungen des linken Unterwalzenendes 14 ausgeführt. Durchmesser A2 des Wellenabschnittes 151 passt demnach genau in den Durchmesser A1 der Bohrung 141, der Durchmesser F2 des Wellenabschnittes 152 ist als Gewinde entsprechend der Bohrung 142 ausgeführt, und Durchmesser B2 des Wellenabschnittes 153 passt schliesslich genau in die Bohrung 143 mit dem Durchmesser B1. Anstatt als Gewinde kann der Wellenabschnitt 152 auch so gestaltet sein, dass er einen Abschnitt einer Vielkeilwelle bildet. Entsprechend muss dann auch die Bohrung 142 am anderen Unterwalzenende Nuten aufweisen. Links vom Wellenabschnitt 151 mit dem Durchmesser A2 ist in Fig. 1 ein Wälzlager 13 schematisch dargestellt, dessen Innenring 130 nach Fig. 2 auf der Verlängerung des Wellenabschnittes 151 ebenfalls mit dem Durchmesser A2 sitzt.The lower roller 1 according to FIG. 1 is shown interrupted. For example, six or eight so-called claws 12 can be arranged on a lower roller 1, these are lower roller sections which preferably have corrugations on their circumference. Between the individual claws 12 there are other sections 11 with a smooth surface. The left lower roller end 14 forms a coupling half for an adjacent lower roller 1 ', the right lower roller end 15 of which is designed like the lower roller end 15 of the lower roller 1. The left lower roller end 14 according to the invention has three bores 141, 142, 143 with the diameters A1, F1 and B1. The diameters A1 and B1 are diameters with a narrow tolerance, while the bore 142 with the diameter F1 is preferably designed as a thread. It goes without saying that the diameter B1 is smaller than the diameter F1 of the bore 142 and that the bore 142 is larger than the thread diameter of the bore 142. The right lower roller end 15 is designed accordingly. The shaft sections 151, 152, 153 with the diameters A2, F2, B2 are designed to match the corresponding bores in the left lower roller end 14. Accordingly, the diameter A2 of the shaft section 151 fits exactly into the diameter A1 of the bore 141, the diameter F2 of the shaft section 152 is designed as a thread corresponding to the bore 142, and the diameter B2 of the shaft section 153 finally fits exactly into the bore 143 with the diameter B1. Instead of being a thread, the shaft section 152 can also be designed such that it forms a section of a splined shaft. Correspondingly, the bore 142 must also have grooves at the other end of the lower roller. 1, a roller bearing 13 is shown schematically to the left of the shaft section 151 with the diameter A2, the inner ring 130 of FIG. 2 of which is also seated on the extension of the shaft section 151 with the diameter A2.

In Fig. 2 sind die ineinandergeschraubten Unterwalzenenden 14 und 15 zu sehen. Der Wellenabschnitt 151 sitzt in der Bohrung 141 und wird so zentriert, der Wellenabschnitt 152 mit dem Aussengewinde sitzt in der Bohrung 142 mit dem Innengewinde, und der Wellenabschnitt 153 sitzt zentriert in der Bohrung 143 des linken Unterwalzenendes 14 der Unterwalze 1. Das andere rechte Unterwalzenende 15 aus Fig. 2 gehört zu der benachbarten Unterwalze 1'. Die Durchmesser A1 und A2 bilden also zusammen einen Teil der Zentrierung der beiden benachbarten Unterwalzen 1 und 1', die Durchmesser B1 und B2 den anderen Teil der Zentrierung beider Unterwalzen 1 und 1', und dazwischen liegt die formschlüssige Verbindung beider Unterwalzen 1 und 1' beim Wellenabschnitt 152 und in der Bohrung 142. Innerhalb des Wellenabschnittes 153 gemäss Fig. 1 ist eine Zentrierbohrung Z für die Herstellung der Unterwalze 1. In Fig. 2 sind die Zentrierlängen L1 bei einer Konstruktion nach dem Stand der Technik und L2 gemäss der Lösung nach der Erfindung eingezeichnet. Wenn gemäss Stand der Technik der Wellenabschnitt 153 nicht vorhanden ist, steht zur Zentrierung des linken Unterwalzenendes 14 gegenüber dem rechten Unterwalzenende 15 nur die Länge L1 zur Verfügung. Wie aus Fig. 2 zu ersehen ist, wird durch Hinzufügen des Wellenabschnittes 153 an das rechte Unterwalzenende 15 und das Vorsehen der kalibrierten Bohrung 143 im linken Unterwalzenende 14 mit der Länge L3 des Wellenabschnittes 151 die Führungslänge L2, über welche beide Unterwalzenenden erfindungsgemäss miteinander geführt sind, gegenüber dem Stand der Technik, wenn man die Darstellung in Fig. 2 als masstäblich betrachtet, etwa vervierfacht. Durch diese wesentlich vergrösserte Führungslänge L2 der Unterwalzen 1 und 1' ineinander ist die Fluchtung und Stabilität der Unterwalzen soweit verbessert, dass nach Montage durch Zusammenschrauben in der Regel ein Nachrichten der gekuppelten Unterwalzen 1 und 1' entfallen kann.In Fig. 2 the screwed lower roller ends 14 and 15 can be seen. The shaft portion 151 is located in the bore 141 and is centered, the shaft portion 152 with the external thread is located in the bore 142 with the internal thread, and the shaft portion 153 is centered in the bore 143 of the left lower roller end 14 of the lower roller 1. The other right lower roller end 15 from FIG. 2 belongs to the adjacent lower roller 1 '. The diameters A1 and A2 thus together form part of the centering of the two adjacent lower rolls 1 and 1 ', the diameters B1 and B2 form the other part of the centering of both lower rolls 1 and 1', and in between there is the positive connection of the two lower rolls 1 and 1 ' at shaft section 152 and in bore 142. Within shaft section 153 according to FIG. 1 there is a centering hole Z for the manufacture of lower roll 1. In FIG. 2, centering lengths L1 are according to a prior art design and L2 according to the solution of the invention. If, according to the prior art, the shaft section 153 is not present, only the length L1 is available for centering the left lower roller end 14 with respect to the right lower roller end 15. As can be seen from FIG. 2, by adding the shaft section 153 to the right lower roll end 15 and providing the calibrated bore 143 in the left lower roll end 14 with the length L3 of the shaft section 151, the guide length L2 over which the two lower roll ends are guided together according to the invention compared to the prior art, if you consider the representation in Fig. 2 as to scale, about fourfold. This substantially increased guide length L2 of the lower rollers 1 and 1 'into one another improves the alignment and stability of the lower rollers to such an extent that after assembly by screwing together, a message from the coupled lower rollers 1 and 1' can generally be omitted.

Claims (3)

  1. A coupling for bottom rollers (1,1') in drafting arrangements of spinning machines, with the bottom rollers being used for transporting and drafting slubbings made from textile material and being provided with bottom roller ends (14, 15) which are arranged as coupling halves for an adjacent bottom roller and with bores (141, 142) in the longitudinal direction of the bottom roller which are arranged so as to match the shaft sections (151, 152) of the other bottom roller end (15), this being so in such a way that a shaft section (151) is used for centering adjacent bottom rollers (1, 1') together with a bore (141) and a further shaft section (152) of the same bottom roller end (15) being horizontal towards the end of the bottom roller enters into an interlocking connection with a further bore (142) of the other bottom roller end (14) for transmitting a drive output, characterized in that a shaft section (153) follows the end of the shaft section (152) of the bottom roller end (15) which in the mounted condition forms a part of the mutual centering of the two bottom rollers (1, 1') together with a respective bore (143) of the other bottom roller end (14).
  2. A spinning machine as claimed in claim 1, characterized in that the interlockingly structured surfaces of the respectively matching bottom roller ends (14 and 15) are arranged as an outer thread and an inner thread.
  3. A spinning machine as claimed in claim 2, characterized in that the interlockingly structured surfaces are, on the one hand, a section of a spline shaft and, on the other hand, a respectively formed bore.
EP19910102683 1990-03-07 1991-02-23 Coupling for bottom rollers in drafting arrangements of spinning machines Expired - Lifetime EP0446690B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH730/90 1990-03-07
CH73090 1990-03-07

Publications (2)

Publication Number Publication Date
EP0446690A1 EP0446690A1 (en) 1991-09-18
EP0446690B1 true EP0446690B1 (en) 1995-05-10

Family

ID=4193851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102683 Expired - Lifetime EP0446690B1 (en) 1990-03-07 1991-02-23 Coupling for bottom rollers in drafting arrangements of spinning machines

Country Status (2)

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EP (1) EP0446690B1 (en)
DE (1) DE59105412D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205322A1 (en) * 1992-02-21 1993-08-26 Schurr Stahlecker & Grill Drafting rollers on spinning frame - have a drive-shaft constructed in sections which are screwed together
DE4211685C2 (en) * 1992-04-07 2001-08-23 Rieter Ag Maschf Spinning machine drafting system
DE10317643A1 (en) * 2003-04-17 2004-11-04 Saurer Gmbh & Co. Kg Bottom roller for drafting systems of spinning machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749191A (en) * 1954-06-21 1956-06-05 Cole Engineering Corp Lower line coupling for fiber attenuating apparatus
GB781746A (en) * 1955-11-18 1957-08-21 Spinnerei Karl Marx Veb Device for holding together individual parts which are coupled together to form a shaft
DE1237473B (en) * 1963-03-13 1967-03-23 Murrhardter Industrieanlagen G Drafting roller coupling
DE2439333C2 (en) * 1974-08-16 1984-05-24 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Shaft coupling, especially for lower rollers on spinning machines
DE2630224A1 (en) * 1976-07-06 1978-01-19 Schurr Stahlecker & Grill Drawing frame assembly - uses preassembled groups of lower roller sections to be coupled together

Also Published As

Publication number Publication date
EP0446690A1 (en) 1991-09-18
DE59105412D1 (en) 1995-06-14

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