WO2019007458A1

WO2019007458A1 - Method for removing and/or introducing a cover strip in a linear anti-friction bearing, and linear anti-friction bearing

Info

Publication number: WO2019007458A1
Application number: PCT/DE2018/100555
Authority: WO
Inventors: Martin Menges
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2017-07-05
Filing date: 2018-06-12
Publication date: 2019-01-10
Also published as: DE102017124243A1

Abstract

In many embodiments, linear anti-friction bearings have a rail and a carriage which is arranged on the rail and can move on the rail, wherein the carriage is supported on the rail via rolling bodies, in order to reduce the friction and/or to increase the load-bearing capability of the linear anti-friction bearing. It is an object of the present invention to propose a method for improved maintenance of a linear anti-friction bearing. To this end, a method for removing and/or introducing a cover strip (7) in a linear anti-friction bearing (1) is disclosed, wherein the linear anti-friction bearing (1) has a guide rail (2), at least one guide carriage (3) and the cover strip (7), wherein the guide carriage (3) is arranged movably on the guide rail (2), wherein the guide rail (2) has a receptacle (8) for the cover strip (7), wherein the cover strip (7) can be arranged in the receptacle (8) between the guide carriage (3) and the guide rail (2), wherein the cover strip (7) is guided through between the guide carriage (3) and the guide rail (2) during the introduction into the receptacle (8) and/or during the removal from the receptacle (8).

Description

Method for removing and / or inserting a cover strip in a

Linear roller bearings and linear roller bearings

The invention relates to a method for removing and / or inserting a cover strip in a linear roller bearing with the features of the preamble of claim 1. The invention also relates to such a linear roller bearing.

Linear roller bearings have, in many embodiments, a rail and a carriage arranged on the rail, which can move on the rail, wherein the carriage is supported by rolling elements on the rail in order to reduce the friction and / or increase the load capacity of the linear roller bearing.

The rails of the linear roller bearings are often fastened via screw to a support structure. For this purpose, the rails through openings, can be pushed through the screws for the screw. However, the rails are not regularly made for a particular support structure, but have as universal components on a series of through holes. This results in a large number of differently deep through holes or blind holes depending on the design of the support structure for the linear roller bearing. In these recordings can accumulate soiling, which are difficult to clean by regular maintenance of the linear roller bearing and therefore lead to an unwanted contamination of the linear roller bearing. Against this background, it is known to cover the passage openings with bands.

For example, document WO 01/42671 A1, which is probably the closest prior art, discloses a guide rail for a linear rolling bearing, wherein the rail has a plurality of passage openings. In the rail, a band is arranged, which engages in two grooves and which covers the passage openings. The grooves are parallel to the longitudinal direction of the guide rail.

It is an object of the present invention to propose a method for improved maintenance of a linear roller bearing. This object is achieved by a method having the feature of claim 1 and by a linear rolling bearing having the feature of claim 10. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

The invention relates to a method which comprises, as a method step, a removal of a cover strip and, alternatively or additionally, as a method step, the introduction of a cover strip in a linear roller bearing. The linear roller bearing has at least one guide rail, at least one guide carriage and a cover strip. The at least one guide carriage is arranged to be movable on the guide rail in a longitudinal direction and / or travel direction. The linear roller bearing has a plurality of rolling elements, wherein the rolling elements are preferably formed as balls. Alternatively, the rolling elements can also be realized as cylindrical rollers etc. Particularly preferably be formed by the carriage and the guide rail several Wälzkörperumläufe in which the rolling elements are arranged. The rolling elements move in an endless movement in the respective Wälzkörperumlauf, so that the carriage can be moved endlessly on the guide rail. The rolling elements are carried and / or guided by the carriage. The guide carriage has guide carriage raceways, the guide rail has rail tracks, wherein the rolling elements are guided between the guide carriage raceways and the rail tracks. The guide rail has a receptacle for the cover strip. The receptacle extends in the longitudinal extent of the guide rail. The cover strip extends in an assembled state between the carriage and the Guide rail. Optionally, the guide rail on through holes or blind holes, which are aligned perpendicular to the longitudinal extent of the guide rail and which are covered by the cover strip. The cover strip has in particular a longitudinal extent, which is a multiple of the transverse extent. Preferably, the cover strip is arranged captively in the receptacle and / or is held by the guide rail.

In the context of the invention, it is proposed that the cover strip be guided during insertion into the receptacle and / or during removal from the receptacle, ie during assembly and / or during dismantling between the guide carriage and the guide rail. Alternatively or in addition, assembly or disassembly is carried out with attached guide carriage. In the event that the linear roller bearing has a plurality of carriages, it is preferred that the cover strip between at least one of the carriages, some of the carriages or all of the carriage and the guide rail is performed.

Particularly preferably, the masking tape is manually guided, moved, pushed or pulled between the carriage and the guide rail during insertion or removal.

It is a consideration of the invention that a change of the cover regularly takes place when the linear roller bearing is integrated in a support structure. For a change of the cover band usually the one or more carriages must be removed from the guide rail. For this purpose, the carriages are released and pushed by the guide rail. This assembly step leads to a large assembly effort and downtime of the linear roller bearing and thus the machine in which the linear roller bearing is integrated. By the method according to the invention is implemented that the cover strip can be inserted into the linear roller bearing or can be removed without having to disassemble the carriage or the. In particular, the guide carriage or carriages may remain on the guide rail when the cover band is exchanged. Preferably, the cover strip is introduced laterally and / or in the longitudinal direction, in particular starting from an end region or an end side of the guide rail, into the guide rail or removed from the guide rail. The masking tape can be unwound, for example, from a roll, which is located at the end of the guide rail.

Preferably, the masking tape is spread over a greater rail length, such as e.g. greater than 1 m, preferably greater than 2 m and in particular more than 3 m between the carriage and the guide rail during insertion or removal.

In a preferred embodiment of the method, the guide rail has a receiving channel, which in a cross section shows a preferably rectangular profile. The receiving channel has a channel bottom and two channel walls. The receptacle is arranged in the receiving channel and / or is formed by this. The channel bottom is arranged perpendicular and / or angled to the channel walls. In the channel bottom, for example, the through hole or blind holes are arranged.

In a preferred structural development of the invention, the channel walls in the longitudinal direction of the guide rail extending and preferably facing each other wall grooves. The wall grooves form the receptacle for the cover band. In particular, the cover strip is inserted into the guide rail such that lateral end regions of the cover strip engage in the wall grooves.

Particularly preferably, the cover strip is held in a form-fitting manner in the wall grooves and / or in the receptacle in the transverse direction to the guide rail. In the longitudinal direction of the guide rail, the cover strip is manually displaceable and / or received friction. The transverse direction is preferably to be understood as meaning any direction which is perpendicular to the longitudinal extension of the guide rail is aligned. Transverse direction thus includes in particular a lateral direction, a direction normal to the surface (height direction) of the channel bottom or in the opposite direction thereto. The wall grooves together form an upper opening width. It is envisaged that the cover tape is formed wider than the upper opening width, so that the cover tape can not be dissolved out in the direction normal to the surface of the channel bottom. In particular, thereby a detachment of the cover strip is avoided in overhead mounting of the guide rail. In particular, the fit width of the cover strip and the thickness of the cover strip to the width and thickness of the wall grooves is designed such that the manual insertion and / or removal is made possible in the wall grooves, even with large guide rail lengths or multi-part, abutted guide rails.

In a preferred embodiment of the invention, the masking tape is flat on the channel bottom. This development is based on the consideration that especially with larger sized guide rails, such as guide rails, which can be performed and thus have a receiving channel width and / or opening width greater than 5 cm, the masking tape must be made so stable anyway that this through the through holes and / or blind holes can not be damaged. Instead, the channel bottom can be used as an additional guide surface for the cover strip, for example, to avoid tilting or the like of the cover strip.

In a particularly preferred embodiment, the cover strip is designed as a metal strip, in particular as a steel strip.

In one possible implementation, the cover strip has a main web section and a secondary web section. The Hauptbannabschnitt engages on both sides in the Wandnuten. The secondary track section is preferably arranged centrally and / or centrally on the main track section and is narrower so that the free side sections of the cover strip remain for insertion into the wall grooves. By contrast, the secondary track section is through the channel walls in the lateral direction guided. This embodiment leads to a particularly stable realization of the cover. In other embodiments of the invention, the cover strip in a simple manner may have a rectangular cross-section, optionally with rounded edges.

In a possible development of the invention, the cover strip may have a centering aid and / or an additional interface for a traction device, in particular at a free end. In the case of the centering aid, the cover strip can be designed, for example, as an arrow or with separate or rounded corners. The additional interface for a traction means can be realized in a simple manner as a passage opening in the cover strip. In the method, it is optionally provided that a traction means is hooked into the interface, so that the cover strip is inserted not only by means of compressive forces in the guide rail, but additionally or alternatively can be drawn with tensile forces in the guide rail. The thickness of the cover strip is especially designed so that no deformations in the cover strip and / or in the guide rail during manual insertion can occur.

Optionally, the guide carriage has a wiper section, in particular a Längsabstreiferabschnitt, wherein the Längsabstreiferabschnitt slides on the cover strip. Thus, the cover band forms a functional partner for the Längsabstreiferabschnitt of the guide carriage. Optionally additionally, the Längsabstreiferabschnitt also slide on the rail tracks right and left to the receiving channel.

It is possible that the cover strip is laterally rounded, in particular rounded off. This variant makes it possible to work with low coefficients of friction between the cover strip and the guide rail. It is also possible to keep the required gap between the guide rail, in particular the wall groove, and the cover strip very low in order to ensure the best possible sealing effect against chips, particles, lubricant, etc. Optionally, the edges of the cover strip are coated with a lubricious material, such as a Gleitkunststoffbeschichtung, a lubricant, in particular pasty lubricant, or wetted with a lubricant. Optionally, the cover strip on the edge sealing lips, in particular resilient sealing lips for sealing against the guide rail.

Optionally, the selected strip cross-section in combination with the base material of the cover strip allows a very small winding diameter to be realized even with long strip lengths. This is important in order to minimize the space required for mounting in front of the guide rail, e.g. in the range of a carriage length to keep. As a result, the assembly is facilitated in many applications with limited accessibility.

Another object of the invention relates to a linear roller bearing, which is designed for the method according to one of the preceding claims.

Further features, advantages and effects of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. These show:

Figure 1 a is a schematic plan view of a linear roller bearing with partially inserted cover strip;

Figure 1 b, the linear roller bearing in the same representation as in Figure 1 with further inserted cover strip;

Figures 2 a - e different variants of the receiving portion of

Guide rail; FIGS. 3 a - g show various variants of the cross-sectional profile of the cover band;

Figures 4 ad different variants of the tape beginning of the cover. 1 shows a schematic plan view of a linear roller bearing 1 as an embodiment of the invention. The linear roller bearing 1 has a plurality of guide rails 2, on which two guide carriages 3 are arranged. The guide rails 2 abut each other at the end, so that they form a common guide rail arrangement. In particular, the guide carriages 3 are arranged on the guide rail arrangement.

The carriage 3 are arranged along a longitudinal extension L on the guide rails 2 movable. The carriage 3 each have a support body 4, wherein at the ends in the direction of travel L head pieces 5 are placed. The guide carriage 3 are mounted on the guide rails 2 via rolling elements (not shown). For example, the guide carriage 3 each have four Wälzkörperumläufe, in which the rolling elements are arranged. In this case, two of the Wälzkörperumläufe are arranged on each side of the guide rails 2.

The guide rails 2 each have a plurality of passage openings 6, which are aligned perpendicular to the direction of travel L and serve to attach the respective guide rail 2 to a support structure. For example, the guide rails 2 are each provided with a bottom surface on the support structure, which is broken through the through-holes 6. Through the through holes 6 screws can be performed to secure the guide rails 2 to the support structure. The linear roller bearing 1 has a cover strip 7, wherein the cover strip 7 covers the guide rails 2 on the side facing the carriage 3, so that the passage openings 6 are closed. The cover tape 7 is arranged in a receptacle 8, which is provided by the guide rail 2. The cover strip 7 extends over a plurality of guide rails 2. It is thus a common cover strip 7 for a plurality of guide rails 2. For mounting the cover strip 7 is laterally in or against the direction of travel L in the Guide rails 2 at an end face or at a joint between two guide rails 2 introduced.

As is apparent in particular in conjunction with FIG. 1 b, the insertion of the cover strip 7 takes place while the guide carriages 3 are movably arranged on the guide rails 2. More precisely, the cover strip 7 is pushed or pulled through between the guide rail 2 and the guide carriage 3, while the guide carriage 3 is arranged movably on the guide rail 2. The cover strip 7 bridges in particular one or more joints 9 between the guide rails 2.

The advantage of the method is that the carriages 3 need not be dismantled from the guide rails 2, so that the machine, device, etc. in which the linear roller bearing 1 is integrated, does not have to be disassembled consuming. An assembly, disassembly or replacement of the cover 7 is possible without much effort.

The guide carriage 3, in particular the support body 4 and / or the head pieces 5 have a Längsabstreifer, which seals a gap between the guide rail 2 and the carriage 3. The longitudinal scraper can slide on the cover strip.

FIGS. 2a-e show in a schematic longitudinal section five different variants of the receptacle 8 in the guide rail 2 for the cover strip 7. The receptacle 8 is formed on the upper side of the guide rail 2. Rail side rails 10 are arranged on the guide rail 2, which extend in this embodiment at an angle of approximately 45 °. The receptacle 8 is formed by a receiving channel 1 1, which is bounded laterally by channel walls 12 a, b and the bottom side by a channel bottom 13. In the channel walls 12 a, b respectively wall grooves 14 a, b are introduced, wherein a depth extension of the wall grooves 14 a, b in the cross section shown in a transverse direction and / or perpendicular to the travel direction L and a longitudinal extension of the wall grooves 14 a, b is aligned parallel or rectified to the travel direction L. In the wall grooves 14 a, b, the cover 7 can be inserted. In the transverse direction to the direction of travel L, the wall grooves 14 a, b form an opening width 0, wherein the opening width 0 is narrower than a width B of the cover 7. The groove width N, which is measured between the groove bottoms of the wall grooves 14 a, b on the other hand, it is larger than the width B of the cover strip 7. The cover strip 7 is thus held in the receiving channel 1 1 in a form-fitting manner in the radial direction to the travel direction L and / or in the transverse direction and / or in the height direction of the guide rail 2. In the direction of travel L, however, the cover strip 7 is manually move and / or arranged with low friction, so that it can be inserted into the receiving channel 1 1 and / or the guide rails 2. In particular, masking tape 7 and receiving channel 1 1 are designed so that upon insertion and / or removal no deformation of the components in the region of the guide rail 2 takes place.

The channel bottom 13 is arranged relative to the wall grooves 14 a, b so that the cover strip 7 is supported in particular in the inserted state on the channel bottom 13 in a planar manner. Thus, the channel bottom 13 forms a guide surface during insertion or removal of the cover 7 in the guide rail 2 or the guide rail assembly. In FIGS. 2a, b, the channel section 15 of the guide rail 2 is in one piece and / or in one piece and / or formed from a common material section. In contrast, the channel sections 15 of Figures 2c - e are formed in several parts, in particular, a portion which comprises the rail tracks 10 and an upper cover of the wall grooves 14 a, b, mounted on a base body.

In the figure 2a, the wall grooves 14 a, b formed as triangular grooves, wherein the lower groove wall is formed by an extension of the channel bottom 13. In the figure 2b, the wall grooves 14 a, b formed as rectangular grooves. In the figure 2c, the wall grooves 14 a, b are formed part-circular in the cross section shown. The opening sections O defining end portions are rounded in the cross section shown. In the figure 2d, the wall grooves 14 a, b in the shown Cross-section formed part-circular, the end portions are realized in the cross-section shown rectangular. In FIG. 2e, the wall grooves 14a, b are part-circular and the end sections are rectangular. The wall grooves 14 a, b, however, are recessed relative to the channel bottom 13, so that it is ensured that the cover strip 7 rests on the channel bottom 13.

FIGS. 3 a-g show various variants of the cover strip 7 in a cross-section, wherein the variants are adapted to the groove shapes of the channel sections 15. Thus, the cover strip 7 of Figure 3a has a lateral slope, which is dimensioned corresponding to the triangular groove of the channel portion 15 in Figure 2a. The masking tape 7 of FIG. 3b is rectangular in the cross section shown, so that it is adapted to the rectangular groove of the channel section 15 in FIG. 2b. The cover strip 7 of FIG. 3c is rounded off in the edge regions, in particular rounded off, so that this is corresponding to the channel sections 15 of FIGS. 2 c-b.

FIGS. 3 d-f show variants of the cover strip 7, which each have a main web section 16 and a secondary web section 17. The main track section 16 is adapted in its width to the groove width N, because side track section 17 is adapted in its width to the opening width O. The adaptation takes place in particular in such a way that the cover band 7 can be inserted without jamming and in particular without deformation of the cover band 7 and / or of the receiving channel 11. The thicknesses of the cover strips 7 are each designed so that the cover 7 can be inserted without jamming and in particular without deformation of the cover 7 and / or the receiving channel 1 1. Furthermore, by designing the strip thicknesses, a flush surface can be produced to the upper side of the guide rail.

FIG. 3d shows a variant of the cover strip 7, the main web section 16 and the secondary web section 17 being formed in one piece from a common base material. The side areas of the main track section 16 are rounded and / or rounded off, similar to the embodiment in FIG. 3c. In the figure 3e, a variant of the cover strip 7 is shown, wherein the main track section 16 and secondary track section 17 are formed as two components, which are interconnected. The side regions of the main web section 16 are rounded and / or rounded as before.

FIG. 3f shows a two-part variant, like FIG. 3e, but with the side regions of the mainman section 16 being rectangular. FIG. 3g shows a one-piece variant, which is constructive like the variant in FIG. 3f. In the two-part variants main track section 16 and side track section 17 are connected to each other, for example, materially bonded.

FIGS. 4 a - d show four variants of a strip beginning of the cover band 7. In the variant of FIG. 4a, the beginning of the strip is formed from above as a rectangle in a plan view. In the variant of FIG. 4b, the corners of the beginning of the strip are cut so that threading of the cover strip 7 into the receiving channel 11 is simplified. For the same purpose in the variant of Figure 4c, the corners are rounded. In FIG. 4d, the beginning of the band of the cover band 7 has a mechanical interface 18, wherein the mechanical interface 18 is designed as a passage opening in the cover band 7. In the mechanical interface 18, for example, a traction device can be hooked to retract the cover 7 in the receptacle 8 and / or the receiving channel 1 1. LIST OF REFERENCE NUMBERS

1 linear roller bearing

2 guide rail

3 carriages

4 supporting body

5 head piece

6 through holes

7 masking tape

8 recording

9 joints

10 rail tracks

1 1 receiving channel

12 a, b channel walls

13 channel bottom

a, b wall grooves

15 channel section

16 main railway section

17 secondary section

18 mechanical interface

L Travel direction / longitudinal direction

0 opening width

B width

N groove width

Claims

claims

1 . Method for removing and / or inserting a cover strip (7) in a linear roller bearing (1), wherein the linear roller bearing (1) has a guide rail (2), at least one guide carriage (3) and the cover strip (7), wherein the guide carriage (3 ) is arranged movable on the guide rail (2), wherein the guide rail (2) has a receptacle (8) for the cover strip (7), wherein the cover strip (7) in the receptacle (8) between the guide carriage (3) and the Guide rail (2) can be arranged, characterized in that the cover strip (2) when inserted into the receptacle (8) and / or during removal from the receptacle (8) in the longitudinal direction of the guide rail (2) between the carriage (3) and the guide rail (2) is performed.

2. The method according to claim 1, characterized in that the guide rail (2) has a receiving channel (1 1) with a channel bottom (13) and two channel walls (12a, b), wherein the receptacle (8) in the receiving channel (1 ) is arranged.

3. The method according to claim 2, characterized in that the channel walls (12a, b) in the longitudinal direction of the guide rail (2) extending wall grooves (14a, b), wherein the wall grooves (14a, b), the receptacle (8) for the cover strip (7) form.

4. The method according to claim 3, characterized in that the cover strip (7) in the wall grooves (14a, b) and / or in the receptacle (8) in the transverse direction of the Guide rail (2) is held positively and is received in the longitudinal direction of the guide rail (2) manually displaceable and / or friction.

5. The method according to claim 4, characterized in that the cover strip (7) rests flat on the channel bottom (13).

6. The method according to any one of the preceding claims, characterized in that the cover strip (7) is designed as a metal strip.

7. The method according to any one of the preceding claims, characterized in that the cover strip (7) has a main web section (16), wherein the main web section (16) on both sides in the wall grooves (14a, b) engages, and a secondary web section (17), wherein the secondary path section (17) is narrower than the main path section (16) and is guided between the channel walls (12 a, b) in the lateral direction.

8. The method according to any one of the preceding claims, characterized in that the cover strip (7) has a centering aid and / or an additional interface (18) for a traction means.

9. The method according to any one of the preceding claims, characterized in that the guide carriage (3) has a Abstreiferabschnitt, wherein the Abstreiferabschnitt on the cover strip (7) slides.

10. Linear roller bearing (1) designed for the method according to one of the preceding claims.