WO2000005511A1

WO2000005511A1 - Roller, especially a pressure roller for textile machines

Info

Publication number: WO2000005511A1
Application number: PCT/EP1999/003364
Authority: WO
Inventors: Joachim Schneider; Detlef GÖRGENS; Franz Willert; Günther FRANKE
Original assignee: INA Wälzlager Schaeffler oHG
Priority date: 1998-07-23
Filing date: 1999-05-15
Publication date: 2000-02-03
Also published as: DE19833114A1; DE19981370D2

Abstract

A roller, especially a pressure roller for textile machines, includes a roller body (1) that is rotationally mounted in relation to a bearing axle (4) by means of a bearing and that is disposed in such a way that it can pivot transversally in relation to the bearing axle (4). The invention concerns a roller in which a hollow body, especially a sleeve (8), which is pivotally retained on the bearing axle (4), wherein an outer ring (6) of the bearing, especially a radially grooved ball bearing (3) is located in the hollow body. A pivot pin (9) of the roller body (1) that is concentrically arranged in relation to the axis of rotation of the roller engages with the inner ring (5) of the bearing.

Description

Name of the invention

Roll, in particular pressure roll for textile machines

description

Field of application of the invention

The present invention relates to rollers, in particular pressure rollers for textile machines. They are arranged in textile machines in such a way that their cover is pressed against a driven roller, a thread or fiber strand being passed between this roller and the cover. This device can either be used only for transporting the thread or - as in spinning machines - also for drawing the fiber strand.

Background of the Invention

From DE 29 23 871 A1, for example, a roller-mounted pressure roller for textile machines has become known. The outer ring provided with a cover of a double-row deep groove ball bearing is rotatably mounted on the inner ring via balls, the inner ring being pivotably arranged transversely to the supporting axis. This is achieved in that a pin which is guided through a transverse bore in the supporting axis is received with its ends in radial bores of the inner ring. Swiveling around the transverse axis enables these pressure rollers to be properly aligned with the driven rollers. In the manufacture of such pressure rollers, machining of both the inner ring and the outer ring of the radial deep groove ball bearing is required. The outer ring is with the cover and the inner ring must be provided with radial holes for receiving the bolt. Summary of the invention

The object of the present invention is therefore to provide a role according to the features of the preamble of claim 1, in which neither the outer ring nor the inner ring has to be processed for use in the role. According to the invention, this object is achieved in that a hollow body, in particular a sleeve, is pivotably held on the support axis, in which hollow body an outer ring of a bearing, in particular a radial deep groove ball bearing, is received, with a pivot pin of the roller body arranged concentrically with the axis of rotation of the roller, an inner ring of the bearing records. In the roller according to the invention, the bearing can be connected to the hollow body and the pivot without any problems. In the bearing seat, the outer diameter of the pivot and the inner diameter of the hollow body are matched to one another for a secure fit. For example, standard deep groove ball bearings can be used in the roller according to the invention. A failed bearing can be exchanged for another bearing without any additional processing steps on the inner or outer ring of the bearing. With this role according to the invention, considerable cost savings can therefore be achieved.

While in the known pressure rollers the inner ring is connected to the fixed support shaft and the outer ring to the rotating roller body, it is exactly the other way around in the invention. In this way, the rotational speed of the rolling elements is reduced compared to the known designs, the drive power required for the pressure rollers being reduced. As a result, the cost of drive power to be provided can also be reduced.

The hollow body and / or the support shaft are preferably made of plastic by injection molding. On the one hand, the final shape can already be specified in the injection mold, on the other hand plastics can be selected, the resilient properties of which can be advantageously used for the invention, as will be explained further below. The hollow body can be arranged between fork arms of the supporting axis and can be pivotably received on the fork arms. This arrangement can be particularly suitable for the automated assembly of rollers according to the invention, since the positioning and possibly latching of the hollow body with the fork arms is easy to accomplish. The hollow body is preferably provided with pivot pins which are arranged transversely to the supporting axis and are mounted in bearing eyes of the fork arms. Both the pivot pin and the bearing eyes can be easily taken into account in the injection molds. One or both pivot pins can each be provided with a projection and the bearing eye can be opened radially through a slot. The projection then engages in the slot with play in the pivoting directions of the pivot pin. In this way, a stop is formed which limits a pivoting angle of the hollow body and thus of the roller transversely to the supporting axis. When viewed in the circumferential direction of the bearing eye, the slot is preferably narrower than the diameter of the pivot pin, the slot being able to be resiliently expanded at least to the diameter of the pivot pin. This results in a further advantage for the assembly of the roller according to the invention: First, the support axis and the hollow body are aligned coaxially to one another, then the hollow body is inserted between the fork arms by merely axially displacing, the pivot pins being pushed through the slots until finally the pivot pins have reached their final seat through the bearing eyes. The resiliently widened slots narrow again, so that the hollow body is captively connected to the supporting axis. In this development according to the invention, not only is the stop described thus formed in a simple manner, but at the same time enables simple and possibly automated assembly.

Further cost advantages can be achieved by forming the roller body from sheet metal and producing it using the deep-drawing process, the pivot pin being stepped in diameter toward its free end to form a shoulder. This shoulder serves as an axial stop for the inner ring, so that the intended position of the inner ring on the pivot pin is reached in a simple manner. The hollow body is preferably formed by a sleeve which receives the outer ring, the end face of the outer ring being engaged by holders which are fastened to the sleeve. Such holders can, for example, be snap-in lugs which are pushed away from the outer ring during insertion into the sleeve and which spring back after passing through the outer ring and thus engage behind the outer ring on the end face. Instead of the snap noses, however, a thin-walled peripheral rim can also be provided, which is also elastically deformable and which, after passing through the outer ring, engages behind the end face. The axial lock thus produced can also be provided by a locking ring inserted in a groove in the sleeve.

Brief description of the drawings

The invention is explained in more detail below on the basis of two exemplary embodiments shown in a total of three figures. Show it:

1 shows a longitudinal section through a roller according to the invention;

Figure 2 shows the role of Figure 1 with the support shaft and sleeve in one

View and

FIG. 3 shows a modified roll according to the invention in a section as in FIG.

Detailed description of the drawings

Figure 1 shows a longitudinal section of a role according to the invention. A roll body 1 formed from sheet metal in the deep-drawing process is provided with a cover 2 for pressing against a roller (not shown). The roller body 1 is rotatably supported by a radial deep groove ball bearing 3 with respect to a supporting axis 4. The radial deep groove ball bearing 3 has an inner ring 5, an outer ring 6 and balls 7 arranged between the outer ring 6 and the inner ring 5. The outer ring 6 is received in a sleeve 8 made of plastic, and the inner ring 5 is seated on a pivot pin 9 of the roller body 1 which is arranged concentrically to the axis of rotation of the roller. The pivot pin 9 is provided with a shoulder 10 against which the inner ring 5 rests. The free end of the pivot is crimped so that the inner ring 5 is axially fixed between the shoulder 10 and the crimp. The outer ring is axially fixed in the sleeve 8. This is achieved by a radial rim 11 of the sleeve 8 and by a locking ring 13 inserted in a groove 12 of the sleeve 8. The locking ring 13 and the radial rim 11 engage behind the outer ring 6 on the end face. The sleeve 8 is pivotally held on the support axis 4, it being possible to pivot the sleeve 8 and thus also to pivot the roller transversely to the support axis 4 - that is to say about a transverse axis oriented transversely to the support axis 4. For regrinding the cover 2, the bore of the pivot pin 9 can be used to hold a clamping device, preferably a mandrel.

Figure 2 clearly shows how the sleeve 8 is pivotally supported on the support axis 4. The support axis 4 has two fork arms 14, of which only one is visible in the illustration shown. The sleeve 8 is arranged between these two fork arms 14. The sleeve 8 has two pivot pins 15 which sit in bearing eyes 16 of the fork arms 14. The bearing eyes 16 are each opened radially through a slot, wherein a projection 18 of the pivot pin 15 engages in the slot 17 with play in the pivoting directions of the pivot pin 15. In this way, a stop is formed which limits a pivoting angle of the sleeve 8 and thus of the roller transversely to the supporting axis 4.

The assembly of the sleeve 8 and the support axis 4 can be accomplished in the role shown by simple axial relative displacement. During the relative displacement, the sleeve 8 is inserted between the two fork arms 14, the pivot pins 15 being pressed through the slots 17 into the bearing eye 16. When the pivot pin 15 has reached its final seat in the bearing eye 16, the resiliently widened slot 17 narrows again, so that the sleeve 8 and the support shaft 4 are securely connected to one another. The support shaft 4 and the fork arms 14 formed in one piece are made of plastic by injection molding, the plastic used has sufficiently large resilient properties so that the slot 17 can be expanded resiliently.

FIG. 3 shows only a section of a further roller according to the invention in a section like FIG. 1. This roller according to the invention differs from the one described above in that it has a modified sleeve 19. Instead of the securing ring, an integrally molded base 20 is provided. At the other axial end of the sleeve 19, a circumferential bead 21 is provided, which is designed to be resilient, and which springs back after insertion of the radial deep groove ball bearing 3 and engages behind the outer ring 6 on the end face.

Furthermore, a support shaft 22 is provided, which is formed by a solid roller or needle, as used for example in rolling bearings. The roller body 1 is mounted on the support shaft 22. The support shaft 22 receives the inner ring 5 of the radial deep groove ball bearing 3.

reference numeral

Reel body

reference

Radial deep groove ball bearings

Supporting axis

Inner ring

Outer ring

Bullet

Sleeve

Pivot shoulder

Radial board

groove

Locking ring fork arm pivot pin

Bearing eye slot

head Start

Sleeve

ground

bead

Supporting axis

Claims

claims

1. roller, in particular pressure roller for textile machines, the roller body (1) of which is rotatably mounted via a bearing relative to a supporting axis (4) and is pivotable transversely to the supporting axis (4), characterized in that a hollow body, in particular sleeve (8), on the support axis (4), in which hollow body an outer ring (6) of the bearing, in particular radial deep groove ball bearing (3), is received, with a pivot pin (9) of the roller body (1) arranged concentrically to the axis of rotation of the roller, an inner ring ( 5) of the camp.

2. Roller according to claim 1, in which the hollow body is arranged between fork arms (14) of the supporting axis (4) and is pivotally received on the fork arms (14).

3. Roller according to claim 2, wherein the hollow body is provided with transverse to the support axis (4) arranged pivot pin (15) which are mounted in bearing eyes (16) of the fork arms (14).

4. Roller according to claims 3, in which at least one of the pivot pins (15) is provided with a projection (18), and in which the bearing eye (16) is opened radially through a slot (17), the projection (18) engages in the slot (17) with play in the pivoting directions of the pivot pin (15).

5. Roller according to claim 5, wherein the slot (17) seen in the circumferential direction of the bearing eye (16) is narrower than the diameter of the pivot pin (15), wherein the slot (17) at least to the diameter of the pivot pin (15) expandable resiliently is.

6. Roller according to claim 1, the roller body (1) is formed from sheet metal and manufactured in the deep-drawing process, wherein the pivot pin (9) is stepped in diameter towards its free end to form a shoulder (10).

7. Roller according to claim 1, in which the outer ring (6) is engaged behind on the end face by holders which are fastened to the sleeve (8).

8. Roller according to claim 7, in which a radial rim (11) of the sleeve (8) engages behind the outer ring (6) on the end face.