TWI548791B - Top roller for a drafting arrangement and method for producing and assembling the same - Google Patents

Description

Top roller for drafting configuration and method for producing and assembling the same

The present invention relates to a top roller for a drafting configuration, comprising: a shaft center member and two journal bearings having bearing bolts, the bearing bolts being disposed on opposite sides of the shaft center member and at their free ends At least one respective rolling bearing is disposed on the upper bearing for mounting an outer ring. The invention further relates to a method for producing and assembling a top roller.

A top roller of the type mentioned at the outset is known from DE 20 61 433 A1 or DE 20 61 434 A1. DE 20 61 433 A1 and DE 20 61 434 A1 describe a top roller having a tubular central part, wherein the journal bearing is fastened by two separate half shafts. The shaft center piece is produced from the tube portion by non-cut forming.

The top roller known from the published application DE 20 61 433 A1 or DE 20 61 434 A1 has heretofore been used only in the special design of the top roller, for example, when the outer bearing diameter is only slightly larger than the shaft diameter, so that it can be used small The radial mounting space is still applied as much as possible when the cross section of the rubber cover is used. With a double-sided bearing seal, individual seal configurations are required in each case. This individual design of the top roller is not suitable for a wide variety of types of applications.

It is an object of the present invention to simplify the top roller for use in a drafting configuration in a manner that standardizes and automates the production and assembly of the top rollers.

According to the present invention, this object is achieved by applying the fifteenth item of the patented scope of the characterization feature and method of claim 1.

Further advantageous developments are the subject of the scope of the patent application.

In accordance with claim 1 of the scope of the patent application, it is proposed to provide various shaft center members for the respective top rollers and to adapt the shaft center members to the respective top, different sections and/or saddle shapes of the top roller carrying and counterweight arms, Wherein the holes are disposed on either side of the isometric center members to sleeve the bearing bolts, and all bearing devices required for mounting are disposed on the bearing bolts so that when the top rollers are assembled, they are independent of The bearing bolts used with the rolling bearing and the outer ring are selected for the shaft center member to suit different sections and/or saddle shapes. The simplified and adapted configuration of the shaft center member allows all of the varying features of the section and saddle shape in the drafting configuration to be integrated into the shaft center member, which allows flexibility and variety of different types of drafting configurations It eliminates the need to exchange or adjust bearing bolts during production and assembly of the top rollers.

In particular, the holes on either side of the shaft center member can always have a uniform depth for pressing into the bearing bolts. This results in the same pressing action of pressing the bearing bolt into the bore of the shaft center piece.

The diameter of the shaft center piece at the end may additionally always correspond to the maximum presence diameter of the shaft center piece.

The maximum presence diameter of the shaft center member is preferably located in the overlap region of the shaft center member and the outer ring. Therefore, the torus to be sealed between the shaft center piece and the outer ring is minimized.

In addition, the diameter and length of the stepped region of the shaft center member for inserting the top roller into the saddle of the top roller carrying and the weight arm may vary depending on the diameter and width of the various saddle shapes.

For this purpose, the transition of the diameter segments on the shaft center member should be uniform. By this measure, the variety of saddle shapes suitable for various types of drafting configurations can be easily realized, and production is particularly advantageous from the viewpoint of manufacturing economy.

The development of the top rollers listed above is used to structurally design the top rollers so that the same parts that can be used for all types of drafting configurations can be used, with the highest degree of flexibility, with the lowest possible installation and handling in a large number of variants. And assembly costs to produce it. The shaft centerpiece according to the invention (independent of the variant) always has a maximum presence diameter of all types of ranges as standard diameter at least in the region of overlap with the bearing bolt. In addition, depending on the diameter and width of the center position, for a particular type of saddle shape, the shaft center member has its center member portions that cooperate with the particular guide rods and upper belt retainers of the wide variety of draft configurations. The saddle-side seal is also reduced to a single embodiment due to the standardization of the shaft centerpiece in terms of diameter in the overlap of the shaft center member and the outer ring, which simplifies part planning and requires only one assembly device. The uniform configuration of the transition of the diameter segments on the shaft center member allows for a versatile versatility in the shape of the saddle. In addition, the uniform transition of the diameter segments on the shaft center member allows the same tool to be used to produce variants of the saddle shape with the lowest possible cost by machine controlled rapid conversion. Another advantage is that the overlapping area of the shaft center members has an effect on the good stability of the bearings on the bearing bolts, especially due to the small spacing from the rolling bearing facing the shaft center piece.

The bearing bolts may preferably have a uniform length that is independent of the shaft center member used. In combination with the uniform depth of the holes in the shaft center piece, the bearing bolts always have the same press fit length. In this way, for all different types of top rollers, the cost for conversion during production and especially during assembly is reduced. The press-in action of the bearing bolts is always the same, so that in the case of a change caused by the section, it is only necessary to displace the press-in unit according to the changed section on one of the assembly configurations.

In detail, the bearing bolts have a uniform diameter. This simplifies production because the rod-shaped starting material always has the same dimensions for all bearing bolts, regardless of the configuration of the top roller for a certain drafting configuration type.

In this case, the press-in depth can always correspond at least to 1.5 times the outer diameter of the bearing bolt. For the various shaft center members used, fixing this value has proven to be particularly advantageous in terms of the stability of the connection of the bearing bolt to the shaft center piece.

The bearing bolt and the outer ring preferably have in each case a spherical rolling body track which is arranged symmetrically with respect to the radial center plane of the outer ring. Here, the rim height of the bearing body of the bearing bolt and the outer ring should be between 5% and 15% of the diameter of the rolling element. Optimizing the diameter of the bearing bolt by reducing the rim height and fixing the press fit length and the range of the shaft center member up to a small distance from the cage back of the rolling bearing allows for the bearing bolt and the shaft center piece Functionally secure connection between them (even in the case of short top roller sections and small and wide saddle shapes).

In a preferred development, the surface of the bearing bolts other than the rolling body track may be non-segmented. This has an effect on the simplification of the production process of the bearing bolts, since the bearing bolts do not have to undergo any surface machining (except for the recesses for the rolling body track).

Advantageously, a sealing lip and a cover are provided in the journal bearing, the at least one rolling bearing being sealed relative to the surrounding environment by the sealing lip and the cover. In this case the sealing lip and the cover have the same outer diameter and the same outer contour.

In this case, on the interior of the outer bearing facing the bearing bolt, the outer bearing may have a radial recess for fastening the sealing lip or cover. In the case of changing the choice of the shaft center piece for adapting to another section and/or saddle shape, the sealing part can also be standardized due to the standardization of the components connected to the sealing part, the shaft center piece and the outer ring .

According to the fifteenth item of the method claim, it is proposed that in order to adapt to different sections and/or saddle shapes, the shaft center member has a central portion adapted to the different sections and/or saddle shapes, while the shaft center The end portion of the sleeve for the bearing bolt is standardized in terms of its outer diameter and hole depth, and all the bearing devices required for the mounting are disposed on the bearing bolt so that it can be independent of the rolling bearing during assembly of the top roller The bearing bolts used with the outer ring are selected for the shaft center member to suit different sections and/or saddle shapes.

The invention will be described in more detail below by means of embodiments shown in the drawings.

Figure 1 depicts a schematic view of a top roller 1 comprising a shaft center member 2 and two journal bearings 3. Each of the journal bearings 3 has a bearing bolt 4 by which the journal bearing 3 can be pressed into the hole 5 in the shaft center member 2, and at least one rolling bearing 6 for mounting the outer ring 7. In Fig. 1, two rolling bearings including a rolling body 6 and a cover 14 are disposed on the free end of the bearing bolt 4. In order to seal the journal bearing 3 with respect to the surrounding environment, a sealing lip 8 is provided on the side facing the shaft center member 2 while the closing cover 9 is disposed on the side remote from the shaft center member 2. In order to achieve the lifetime lubrication of the rolling bearing 6, a supply of lubricating oil can be provided between the rolling bearings 6 in the interior of the journal bearing 3.

The cover 9 or the sealing lip 8 is fastened to the journal bearing 3 by a radial recess 11 introduced into the interior of the outer ring 7, into which the cover 9 or sealing lip 8 engages. The sealing lip 8 is cylindrical and has a U-shaped cross section, so that the sealing lip 8 rests on the inside of the outer ring 7 and on the surface of the shaft center member 2, extending in the axial direction, as shown in FIG.

The shaft center member 2 according to Fig. 1 has a central portion 10 which corresponds to a specific guide or upper belt holder of the drafting arrangement in its axial extent S1. In the region of overlap of the shaft center member 2 and the journal bearing 3, the shaft center member 2 has a maximum presence diameter D which is always independent of the variation of the central portion 10 for the various saddle shapes and sections and for all axes The center piece 2 is a standardized part. The shaft center member 2 selectively has a coating that is resistant to corrosion and wear.

In the case of a larger section greater than/equal to 80 mm, the shaft centerpiece 2 is preferably produced from a rod material having a precision tolerance diameter corresponding to the normalized diameter of the shaft center piece 2 in the overlap region D.

For shorter sections less than/equal to 80 mm, the shaft centerpiece 2 can be selectively produced from a tube having a standardized outer diameter, the tube being mechanically trimmed only in areas with precision measurement tolerances, such as Socket the hole 5 of the bearing bolt 4 of uniform length. The production of the shaft center member 2 and the assembly of the journal bearing 3 thereon are simplified, since the hole depth B of the hole 5 is standardized, so that the press-in depth B in the bearing bolt 4 to the shaft center member 2 is always the same, and The size of the ring 7 is irrelevant.

Figure 2 shows a top roller 1' having a section larger than that of Figure 1. This structure is the same as the embodiment of the top roller 1 shown in FIG. The difference between the top roller 1 according to FIG. 1 and the top roller 1 ′ according to FIG. 2 is only the length of the shaft center piece 2 ′ (in particular, the top roller 1 ′ corresponds to another drafting configuration or The different sections of the type of drafting arrangement and/or the axial extent S2 of the central portion 10' of the saddle shape are in the longer configuration of the outer ring 7'. Therefore, the indentation depth B is here also the same as the variant described in FIG.

The journal bearing 3 of the top roller 1 according to the present invention will be described in more detail with reference to Figs. For simplification and standardization, the bearing bolt 4 has a uniform length L and a uniform diameter d. For all of the shaft center members 2, 2', the length L and the uniform diameter d of the bearing bolts 4 are the same regardless of the axial extents S1, S2 of the shaft center members 2, 2'. The bearing bolts 4 are not segmented and have only two spherical tracks 12 which are ground in a solid region for guiding the rolling bodies 6. Corresponding to the track 12 on the bearing bolt 4, the outer ring 7 also has a spherical track 14 in its interior. Furthermore, as already stated, the radial recess 11 is introduced into the interior of the outer ring 7 and is used to seal the configuration of the components. Furthermore, the outer ring 7 has a straight, non-segmented inner surface. The outer ring 7 is designed to be completely symmetrical with respect to its central plane M, so that no directional feed is required during assembly. The rim height of the track 12 of the bearing bolt 4 and the track 14 of the outer ring 7 is in the range of 5% to 15% of the diameter of the rolling element 6. The arrangement of the rails 12, 14 on the bearing bolt 4 and the outer ring 7 is selected such that the bearing bolt 4 on the side facing the cover 9 has a maximum projection which corresponds to 0.25 times the diameter d of the bearing bolt 4, while facing On the side of the sealing lip 8, the projection corresponds to at least 1.5 times the diameter d of the bearing bolt 4. The symmetrical shape of the outer ring 7 and the bearing bolts 4 ensures a very simple and reliable supply of parts in the manufacturing and assembly process. In particular, its straight shape and smooth surface reduces the risk of dust and debris from the manufacturing steps prior to assembly and facilitates the cleaning process at the end of the manufacturing of the part.

The structure and design of the journal bearing 3 allows the required bearing components to be integrated into the journal bearing 3. On the other hand, the shaft center member 2 is designed exclusively so that only by the exchange of the shaft center members 2, 2', the top roller 1 can be adapted to the top roller carrying and different sections of the weight arm during production and assembly thereof. And / or saddle shape.

1. . . Top roller

1'. . . Top roller

2. . . Shaft center piece

2'. . . Shaft center piece

3. . . Journal bearing

4. . . Bearing bolt

5. . . hole

6. . . Rolling bearing / rolling element

7. . . Outer ring

7'. . . Outer ring

8. . . Sealing lip

9. . . Cover/cover

10. . . Central part

10'. . . Central part

11. . . Radial recess

12. . . track

14. . . Track/cover

B. . . Pressing depth

D. . . diameter

d. . . diameter

L. . . length

S1. . . Axial stretching

S2. . . Axial stretching

Figure 1 shows a schematic longitudinal cross-sectional view of a tube roller having a short section;

Figure 2 shows a schematic longitudinal cross-sectional view of a tube roller having a large section;

Figure 3 shows a schematic view of the journal bearing according to Figure 1.

1. . . Top roller

2. . . Shaft center piece

3. . . Journal bearing

4. . . Bearing bolt

5. . . hole

6. . . Rolling bearing / rolling element

7. . . Outer ring

8. . . Sealing lip

9. . . Cover/cover

10. . . Central part

B. . . Pressing depth

D. . . diameter

S1. . . Axial range

Claims (15)

A top roller (1, 1') for a drafting arrangement comprising a shaft center member (2, 2') and two journal bearings (3) having bearing bolts (4), the bearing bolts ( 4) disposed on the opposite side of the shaft center member (2, 2') and having at least one respective rolling bearing disposed on the free end thereof, the rolling bearing for mounting an outer ring (7, 7'), characterized In that, the various shaft center members (2) are provided for a respective top roller and are adapted to the respective top, different sections and/or saddle shapes of the top roller carrying and counterweight arms, wherein the holes are configured in the same Aligning the bearing bolts (4) on either side of the shaft center member (2, 2'), all of the bearing devices required for installation are disposed on the bearing bolt (4) such that when assembled When the top roller (1) is adapted to different sections and/or saddle shapes, the selection of the shaft centerpiece (2, 2') can be independent of the rolling bearing (6) and the outer ring (7, 7'). ) These bearing bolts (4) are used together. The top roller (1, 1') of claim 1 is characterized in that the holes (5) on either side of the shaft center member (2, 2') always have a uniform depth (B) for pressing the bearing bolts (4). A top roller (1, 1') as claimed in claim 1 or 2, characterized in that the diameter (D) of the shaft center member (2, 2') always corresponds to the shaft center member at the end The maximum existence diameter of (2, 2'). The top roller (1, 1') of claim 3, wherein the maximum diameter (D) of the shaft center member (2, 2') is disposed on the shaft center member (2, 2'). ) in the overlapping area with the outer ring (7, 7'). The top roller (1, 1') of claim 1 is characterized in that the shaft for inserting the top roller (1, 1') in the saddle of the top roller carrying and the weight arm The diameter of the central member (2, 2') and the length of the stepped regions (S1, S2) may vary depending on the diameter and width of the various saddle shapes. The top roller (1, 1 ') of claim 5, wherein the transition of the diameter segments on the shaft center member (2, 2') is uniform. The top roller (1, 1') of claim 1 is characterized in that the bearing bolts (4) have a uniform length (L) independent of the shaft center member (2, 2') used. ). The top roller (1, 1') of claim 1 is characterized in that the bearing bolts have a uniform diameter (d). The top roller (1, 1') of claim 8 is characterized in that the press-in depth (B) always corresponds to at least 1.5 times the diameter (d) of the bearing bolt (4). The top roller (1, 1') of claim 1 is characterized in that the bearing bolt (4) and the outer ring (7, 7') have spherical ball tracks in each case (12, 14) The spherical ball tracks are arranged symmetrically with respect to the radial center plane of the outer ring (7, 7'). The top roller (1, 1') of claim 10, wherein the bearing bolts (4) and the rim height of the rolling element rails (12) of the outer ring (7) are Between 5% and 15% of the diameter of the rolling element (6). The top roller (1, 1') of claim 10 or 11 is characterized in that the surface of the bearing bolts (4) is not segmented except for the rolling element rails (12). The top roller (1, 1') of claim 1 is characterized in that a sealing lip (8) and a cover (9) are provided in the journal bearings (3) by means of the sealing lip (8) and the cover (9) seals the at least one rolling bearing with respect to the surrounding environment. A top roller (1, 1') according to claim 12, characterized in that the outer ring (7, 7') has a radial recess (11) on its inner side facing the bearing bolt (4). The radial recesses (11) are used to fasten the sealing lip (8) or the cover (9). A method for producing and assembling a top roller (1, 1') for a drafting arrangement, according to any one of claims 1 to 14, the top roller (1, 1') a shaft center member (2, 2') and two journal bearings (3) having bearing bolts (4) disposed on opposite sides of the shaft center member (2, 2') And at least one respective rolling bearing is disposed on the free end thereof, the rolling bearing is for mounting an outer ring (7, 7'), the method is characterized in that, in order to fit different sections and/or saddle shapes, The shaft center member has a central portion (10, 10') adapted to the different sections and/or saddle shapes, and the shaft center member (2, 2') is used to nest the bearing bolts (4) The end portion is configured in a manner normalized in terms of its outer diameter and hole depth, and all of the bearing devices required for mounting are disposed on the bearing bolt (4), thus the top roller (1) During assembly, the bearing bolts (4) used with the rolling bearing and the outer ring (7, 7') can be used to suit different sections and/or saddles. The shape of the object is selected for the center piece (2, 2') of the shaft.