CN101326316A - Idler roller - Google Patents

Abstract

The invention relates to an idler roller for guiding a thread especially on a godet roller of textile machines. Said idler roller comprises a guiding jacket which is mounted on the circumference of a roller shaft by means of a rolling contact bearing. In order to reduce the starting resistance of the idler roller to a minimum, the guiding jacket is formed by a pot-shaped hollow member which can be produced by forming a metal sheet that has a thickness of <2mm under a combination of tensile and compressive conditions.

Description

Loose roll

Technical field

The present invention relates to a kind of by claim 1 loose roll that is used to guide long filament as described in the preamble.

Background technology

In weaving loom,, one or more long filament is repeatedly laid around driven godet roller shell of a godet roller with twining, so that described long filament passes through driven godet roller shell conveying owing to twining friction in order to carry and guide long filament known.Become possibility for making repeatedly to twine on the godet roller shell, set a loose roll (Beilaufrolle) to godet roller under normal conditions, this loose roll has a guiding cover that is used to admit the long filament winding.For example by the loose roll of the known a kind of this type of DE 199 00 568 A1.Known loose roll has a guiding cover, this guiding cover as one with two outer rings that are positioned at the rolling bearing of inside, but as a construction unit free rotary ground supporting on roll shaft.At this, on a free end of roll shaft, a quick acting closure is set, so that the related rolling bearing of guiding cover can exchange and change fast.At this moment, in order to admit the clamping of rolling bearing, the outer ring of working as the guiding cover must have enough stability and quality.Yet for the starting of such loose roll, what be worth expectation especially is that the guiding cover is made thin-walled and light as far as possible, only produces by the long filament that remains on the circumference because be used to drive the driving power of guiding cover.

Summary of the invention

Therefore the objective of the invention is, create a kind of loose roll that has this type of the guiding cover that quality is little as far as possible.

According to the following realization of this project of the present invention, guiding cover is made of the hollow body of a jar shape, and this hollow body can be made less than the thin plate of 2mm by the tension and compression thickness of slab that is shaped.

Favourable improvement structure of the present invention limits by the feature and the feature combination of dependent claims.

Find astoundingly, not only for guiding the required surface quality of long filament but also, can advantageously on a hollow body of making by the shaping thin plate, realizing for admitting the required standard size (Passungsmasse) of rolling bearing.Can realize the very guiding cover of thin-walled thus, or even in the scope less than 0.5mm.

For the axial support at the inner rolling element of guiding cover, improvement structure of the present invention has proved effective especially, and the bottom of hollow body constitutes the backstop of an inside at this moment.Can advantageously avoid guiding cover inner stepped diameter thus, have constant intensity on the length thereby guiding is enclosed within its whole taking.Take the length available that can guide long filament thereon that length is meant the guiding cover here.

In order to mount and dismount, hollow body preferably has a punching of making at blind end in the bottom.Make thus and become possibility from the contact both sides (Eingriff) of hollow body.

Improvement structure of the present invention, in hollow body, this is particularly advantageous to the rolling body bearing device by an outer plastic cover radial support therein, so that can irrespectively determine the rolling body bearing device size with the diameter of guiding cover.The rolling body bearing device can design the rolling bearing or the rolling element of less relatively and low friction like this.Another advantage of this improvement structure draws thus, and rolling body bearing device itself can maintain by clamping device in the guiding cover of thin-walled very.Plastic sheath is preferably by a kind of thermoplastic for this reason, and for example the PBT-plastics are made, so that the distortion by plastic sheath produces clamping force when interference fit, and has guaranteed the shape stability of thin-walled hollow body.

In order to receive distortion, plastic sheath preferably has a plurality of clamping ribs, clamps rib by these rolling bearing is remained in the hollow body.Obtain free space thus in the intermediate gaps that clamps between the rib, it makes it possible to material and admits preformed material.Clamp rib can be on plastic sheath not only radial loop around or extend axially formation.

Rolling bearing that the rolling body bearing device preferably is arranged side by side by two, that have a bearing holder (housing, cover) respectively constitutes, wherein each bearing holder (housing, cover) have one inside around the maintenance groove, embed the outer ring of rolling bearing therein.Therefore, rolling bearing can be fixed in the hollow body reliably.

Plastic sheath or bearing holder (housing, cover) preferably directly as a moulding, directly are shaped with respect to rolling bearing.

In order to support loose roll, according to a preferred structure that improves of the present invention, roll shaft has an engage sleeves on stiff end, and this engage sleeves can be inserted in the installing port of support.Stiff end here preferably designs with the bearing end different shaft diameters, thereby the size of standing part and bearing portions can be chosen as different.

In order to reach the long as far as possible life-span, the outer peripheral face of hollow body preferably is made of a surfaces hardened.Raw material as hollow body preferably adopt the thin plate that is made of chrome-nickel steel at this.

Description of drawings

Explain the present invention below with reference to accompanying drawing in detail by embodiment according to loose roll of the present invention.

In the accompanying drawing:

Fig. 1 is according to the signal longitudinal section of the embodiment of loose roll of the present invention;

Fig. 2 is used for the signal longitudinal section by the embodiment of the guiding cover of the loose roll of Fig. 1.

The specific embodiment

Letter illustrates a longitudinal section according to the embodiment of loose roll of the present invention among Fig. 1.Loose roll has a columniform guiding cover 1 in order to guide long filament, and this guiding is set on the roll shaft 2.Columniform guiding cover 1 is that the hollow body 8 by a jar shape constitutes.The hollow body 8 of jar shape is a deep-draw part, and less than 2mm, the tension and compression that are preferably less than (metal) thin plate 19 of 1mm are shaped and make by thickness of slab for it.In the embodiment shown in fig. 1, hollow body 8 is to be that the chromium nickel thin plate of 0.4mm constitutes by thickness.Hollow body 8 has a bottom 9 in the right side shown in Fig. 1.The opposed end face of hollow body 8 is open configuration.In bottom 9, make a punching 10 like this, make bottom 9 as the rolling body bearing device 3 of design of annular stop 17 axial support in hollow body 8 inside.The outer peripheral face 11 of hollow body 8 is made of a surfaces hardened, and at least one threads can repeatedly be twined the ground guiding on this surface.

Rolling body bearing device 3 in hollow body 8 has a plastic sheath 4 for radial support, it on excircle, comprise a plurality of around clamping rib 7.Clamping each free space 18 that constitutes between the rib 7 between hollow body 8 and plastic sheath 4.Plastic sheath 4 is pressed in the hollow body 8 jointly with rolling bearing 3 and roll shaft 2, and wherein plastic sheath 4 abuts on the backstop 17 that is made of bottom 9.At this, plastic sheath 4 is maintained in the hollow body 8 by clamping rib 7.Plastic sheath 4 preferably by a kind of thermoplastic for example the PBT-plastics constitute so that only generation plastic sheath 4 in of material deformation when being pressed into.At this, the plastic deformation of plastics is advantageously received by free space 18, therefore the expansion or the distortion that can not produce unallowed hollow body 8.

In the embodiment shown in fig. 1, rolling body bearing device 3 is made of two independent rolling bearings 3.1 and 3.2, wherein sets a bearing holder (housing, cover) 4.1 and 4.2 respectively for each rolling bearing 3.1 and 3.2.Bearing holder (housing, cover) 4.1 and 4.2 constitutes plastic sheath 4 thus.Bearing holder (housing, cover) 4.1 and 4.2 have one be positioned at inner around guide groove 6.1 and 6.2, keeping the bearing outer ring 5.1 and 5.2 of rolling bearing 3.1 and 3.2 therein respectively.For fixing of bearing outer ring 5.1 and 5.2, bearing holder (housing, cover) 4.1 and 4.2 preferably is made of moulding, and moulding is molded directly within on bearing outer ring 5.1 and 5.2.

Rolling bearing 3.1 and 3.2 in this embodiment is as commercial general ball bearing, its inner ring directly remain on roll shaft around on.For this reason, roll shaft 2 has the bearing end 12 that a shaft diameter reduces.At the stiff end 13 that is positioned at bearing end 12 opposites, on greater than the shaft diameter of bearing end shaft diameter, constituting an engage sleeves 14 on the roll shaft.Roll shaft 2 protrudes in the end face that opens wide of hollow body 8 by stiff end 13, so that engage sleeves 14 can directly be inserted and be clamped in the installing port 15 of support 16 in order to support loose roll.Support 16 is that with dashed lines shows in the embodiment shown in fig. 1.

In the embodiment shown in fig. 1, the structure of member is exemplary.Like this, but plastic sheath and rolling body bearing device integral type constitute.It is important in this that the guiding cover that is made of hollow body has a circumference, the selection of this circumference and the size of bearing arrangement are determined irrelevant.And the radial support of rolling body bearing device has shock-absorbing capacity by a plastic sheath that is made of thermoplastic, so that the guiding cover can hang down quiveringly is driven.At this, clamp rib and also can on plastic sheath, advantageously constitute to axial extension.By the raw material tension and compression of sheet form being configured as the hollow body of jar shape, as preferred construction form of the present invention.But also exist following possibility in principle, jar shape hollow body constitutes the base section of a sealing.

For this reason, the signal longitudinal section of the embodiment of another guiding cover shown in Figure 2.Guiding cover 1 is made of a hollow body 8, and the tension and compression of this hollow body 8 by thin plate 19 are shaped and make.Original material preferably by thickness of slab less than 1mm, the chromium nickel thin plate that is preferably less than 0.5mm is made.Hollow body 8 constitutes the jar shape that has a closed bottom 9.Outward-dipping starting flange 19 of moulding on the end face that opens wide on the opposite of hollow body 8, the outer peripheral face 11 of hollow body 8 is limited one-sided by this starting flange.For the long filament that guides to twine the ground guiding on outer peripheral face 11 tops, outer peripheral face 11 has coating or surface hardening.At this, by the starting flange 19 in outer peripheral face 11 ends, what guarantee that long filament twines falls (Abfall) and unwinding.

List of numerals

1 guiding cover

2 roll shafts

3 rolling body bearing devices

3.1,3.2 rolling bearings

4 plastic sheaths

4.1,4.2 bearing holder (housing, cover)s

5.1,5.2 bearing outer rings

6.1,6.2 grooves

7 clamp rib

8 hollow bodies

9 bottoms

10 punchings

11 side faces

12 bearing ends

13 stiff ends

14 engage sleeves

15 installing ports

16 supports

17 backstops

18 free spaces

19 thin plates

Claims (9)

1. loose roll that is used to guide long filament, it has: guiding cover (1) and a roll shaft (2), wherein guiding cover (1) is bearing on the circumference of roll shaft (2) by rolling body bearing device (3), it is characterized in that, guiding cover (1) is made of the hollow body (8) of a jar shape, and this hollow body (8) can be made less than the thin plate (19) of 2mm by the tension and compression thickness of slab that is shaped.

2. loose roll as claimed in claim 1 is characterized in that, the bottom (9) of hollow body (8) constitutes a backstop (17) that is used for the inside of axial support rolling body bearing device (3).

3. loose roll as claimed in claim 1 or 2 is characterized in that, hollow body (8) has a punching (10) in bottom (9) on the blind end.

4. as each described loose roll in the claim 1 to 3, it is characterized in that rolling body bearing device (3) is in order to have the plastic sheath (4) of an outside in the inner radial support of hollow body (8).

5. loose roll as claimed in claim 4 is characterized in that, plastic sheath (4) has a plurality of clamping ribs (7), clamps rib by these and makes rolling body bearing device (3) remain on hollow body (8) inside.

6. as claim 4 or 5 described loose rolls, it is characterized in that, that rolling body bearing device (3) is arranged side by side by two, respectively have the rolling bearing (3.1,3.2) of a bearing holder (housing, cover) (4.1,4.2) to constitute, and each bearing holder (housing, cover) (4.1,4.2) have an inside around maintenance groove (6.1,6.2), be embedded in rolling bearing (3.1 at described maintenance groove, 3.2) outer ring (5.1,5.2).

7. as each described loose roll in the claim 4 to 6, it is characterized in that plastic sheath (4) or bearing holder (housing, cover) (3.1,3.2) constitute a moulding around rolling bearing.

8. as each described loose roll in the above-mentioned claim, it is characterized in that, roll shaft (2) has a bearing end (12) and a stiff end (13), the shaft diameter of described bearing end (12) is less than the shaft diameter of stiff end (13), and described stiff end (13) constitutes an engage sleeves (14), and this engage sleeves (14) can be inserted in order to support loose roll in the installing port (15) of a support (16).

9. as each described loose roll in the claim 1 to 8, it is characterized in that the outer peripheral face (11) of hollow body (8) constitutes by surfaces hardened or by coating.

Images