DE102017201968A1 - Guide rail with measuring scale on the head side - Google Patents

Abstract

The invention relates to a guide rail (10) having a first, a second and a third metal strip (20; 30; 40), wherein the second metal strip (30) forms a measuring scale, wherein the first metal strip (20) acts on the remaining guide rail (10 According to the invention, the second metal strip (30) is integrally connected to one of the outer side (23) of a central region (21) of the first metal strip (20), said outer side (23) facing away from the guide rail (10) the third metal strip (40) is planar, being materially connected to an outside of the second metal strip (30) facing away from the first metal strip (20) such that the openings (31) in the second metal strip (30) are covered.

Description

The invention relates to a guide rail according to the preamble of claim 1.

From the catalog, which on 30.01.2017 under the Internet address http://www.boschrexroth.com/various/utilities/mediadirectory/download/index.jsp? object_nr = R999000466 was known, a guide rail is known in which the inventions according to US 6 564 468 A and US 5 575 566 A combined with each other. Namely, a first metal strip is provided, with which the mounting holes of the guide rail are covered. The first metal strip is clipped from the head side onto a base body of the guide rail. Further, a material measure in the form of a second metal strip is provided, which is arranged on a side surface of the guide rail, away from the first metal strip. The second metal band is covered by a third metal band, so that it is protected from contamination.

An advantage of the present invention is that it is particularly simple and inexpensive. Nevertheless, the known from the prior art features, namely the cover of the mounting holes and the cover of the material measure or the second metal strip, realized. In addition, it can be ensured that the mounting holes do not interfere with the scanning of the material measure.

According to claim 1, it is proposed that the second metal strip is integrally connected to one of the outer sides of a middle region of the first metal strip, said outer side pointing away from the guide rail, wherein the third metal strip is planar, thus being materially bonded to one of the first metal strip connected to the outside of the second metal strip is connected, that the openings are covered in the second metal strip.

The guide rail preferably has a plurality of mounting holes, which are distributed along the longitudinal axis, wherein they are covered by the first and the second metal strip. Instead of the fastening bores, a dovetail-shaped foot region can also be provided on the guide rail. The first metal strip and / or the second metal strip and / or the third metal strip and / or the fourth metal strip explained below preferably each have a constant thickness. The first metal band and / or the second metal band and / or the fourth metal band are preferably free of openings. The third metal strip is preferably connected directly cohesively to the central region of the second metal strip. The third metal strip is preferably connected directly cohesively to the central region of the second metal strip. The various cohesive connections mentioned are preferably designed as bonds, it also being possible to weld the corresponding parts.

In the dependent of claim 1 claims advantageous refinements and improvements of the invention are given.

It can be provided a fourth metal strip which is formed separately from the first, the second and the third metal strip, wherein it extends in the direction of the longitudinal axis along the guide rail, wherein the fourth metal strip is formed flat, wherein it directly on a top surface of Guide rail rests, wherein it rests directly or via an adhesive layer on an outer side opposite the inner side of the central region of the first metal strip. The fourth metal strip is preferably held only frictionally between the remaining guide rail and the first metal strip. But it is also conceivable that the second metal strip is materially connected to the first metal strip.

It may be provided that the relative magnetic permeability of the material of the third metal strip is between 0.5 and 2, wherein the relative magnetic permeability of the material of the second metal strip and / or the fourth metal strip is between 10 and 500,000. An advantage of the present invention is that the relative magnetic permeability of the first metal strip can be chosen freely, so that its material can be optimized without difficulty in terms of cost-effective production of the first metal strip.

Protection is also claimed for a guide rail according to claim 4. In the dependent of claim 4 claims advantageous refinements and improvements are given.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

• 1 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer ersten Ausführungsform der Erfindung;
• 2a eine grobschematische Vorderansicht des ersten Metallbands nach 1;
• 2b die zu 2a gehörige Draufsicht;
• 3a eine grobschematische Vorderansicht des zweiten Metallbands nach 1;
• 3b die zu 3a gehörige Draufsicht;
• 4a eine grobschematische Vorderansicht des dritten Metallbands nach 1;
• 4b die zu 4a gehörige Draufsicht;
• 5a eine grobschematische Vorderansicht des vierten Metallbands nach 1;
• 5b die zu 5a gehörige Draufsicht;
• 6 eine grobschematische Seitenansicht einer Linearführung mit einer Führungsschiene nach 1;
• 7 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer zweiten Ausführungsform der Erfindung;
• 8 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer dritten Ausführungsform der Erfindung;
• 9 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer vierten Ausführungsform der Erfindung;
• 10 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer fünften Ausführungsform der Erfindung;
• 11 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer sechsten Ausführungsform der Erfindung;
• 12 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer siebten Ausführungsform der Erfindung; und
• 13 eine grobschematische Vorderansicht einer Führungsschiene gemäß einer achten Ausführungsform der Erfindung.

The invention will be explained in more detail below with reference to the accompanying drawings. It shows:

• 1 a rough schematic front view of a guide rail according to a first embodiment of the invention;
• 2a a rough schematic front view of the first metal strip after 1 ;
• 2 B the too 2a associated top view;
• 3a a rough schematic front view of the second metal strip after 1 ;
• 3b the too 3a associated top view;
• 4a a rough schematic front view of the third metal band after 1 ;
• 4b the too 4a associated top view;
• 5a a rough schematic front view of the fourth metal strip after 1 ;
• 5b the too 5a associated top view;
• 6 a rough schematic side view of a linear guide with a guide rail after 1 ;
• 7 a rough schematic front view of a guide rail according to a second embodiment of the invention;
• 8th a rough schematic front view of a guide rail according to a third embodiment of the invention;
• 9 a rough schematic front view of a guide rail according to a fourth embodiment of the invention;
• 10 a rough schematic front view of a guide rail according to a fifth embodiment of the invention;
• 11 a rough schematic front view of a guide rail according to a sixth embodiment of the invention;
• 12 a rough schematic front view of a guide rail according to a seventh embodiment of the invention; and
• 13 a rough schematic front view of a guide rail according to an eighth embodiment of the invention.

1 shows a rough schematic front view of a guide rail 10 according to a first embodiment of the invention. The guide rail 10 includes a main body 16 which forms with a constant outer cross-sectional shape along a longitudinal axis 11 extending, which is perpendicular to the plane of the 1 is aligned. The present guide rail 10 is for use with a carriage (# 60 in 6 ), which has four rows of endlessly revolving rolling elements, wherein the rolling elements are spherical. The main body 16 Therefore, on two opposite side surfaces in each case two rail tracks 12 , which are adapted to spherical rolling elements. It is understood that the present invention is applicable to any number of railroad tracks 12 and any Wälzkörperform, especially for roller-shaped rolling elements, is usable. The main body 16 is preferably made of steel, wherein it is at least in the field of railroad tracks 12 is cured.

The entire guide rail 10 is mirror-symmetric with respect to a plane of symmetry 18 formed, which the longitudinal axis 11 contains. The main body 16 has a plurality of mounting holes 15 on which evenly distributed along the longitudinal axis 11 are arranged, with their central axis perpendicular to the longitudinal axis 11 aligned with it, with the plane of symmetry 18 coincides. The mounting holes 15 are designed as stepped holes, which are adapted to standard cylinder head bolts.

The guide rail comprises a first metal band 20 , which preferably according to US 5 575 566 A the entire contents of which are referred to and made the subject of the present application. The first metal band 20 embraces a head side 13 of the basic body 16 such that the first metal band 20 firmly with the remaining guide rail 10 is connected, in particular friction and form-fitting on the body 16 is held. Outside on the first metal band 20 lies a second metal band 30 on, which is materially connected to the first metal strip 20, in particular glued. Most preferably, the bonding is made by means of a so-called transfer adhesive tape, wherein preferably an adhesive layer without a carrier is used. The second metal strip 30 forms a material measure as it is for example from the EP 729 562 B 1, the entire contents of which are referred to and incorporated in the content of the present application. The corresponding sensor (No. 63 in 6 ) works inductively. In the context of the present invention, it is preferably desired that only the second metal strip 30 Causes measurement signals on the sensor. The mounting holes 15 however, should not cause any signals on the sensor.

The second metal band 30 and the main body 16 are preferably each made of a steel which is magnetizable, wherein the corresponding relative magnetic permeability is most preferably between 10 and 500,000. In and of itself, it would be desirable, even the first metal band 20 made of a corresponding material, so that the first metal strip 20 the mounting holes 15 opposite the sensor (no. 63 in 6 ) shields. However, it has been shown that the in 1 shown arrangement in the context of a series production despite the at first glance higher material usage is easier and less expensive to produce. This was the material of the first material band 20 chosen so that its production in itself is particularly simple and inexpensive. Preferably, for the first metal strip 20 an austenitic, stainless steel used. This is particularly well deformable, so that the bent edge areas (No. 22 in 2a ) are easy and reliable to produce. However, it is not magnetizable, its relative magnetic permeability being for example between 0.5 and 2. The first metal band 20 has therefore substantially no shielding effect with respect to the mounting holes 15th

Nevertheless, to obtain the desired shielding, the fourth metal band 50 became between the first metal band 20 and the body 16 built-in. This is preferably solely by the clamping force of the first metal strip 20 held, in particular, no bonding is provided. The material of the second metal strip is preferably magnetizable, wherein the corresponding relative magnetic permeability is most preferably between 10 and 500,000. Preferably, the second and the fourth metal band exist 30 ; 50 from the same material, most preferably a magnetizable, stainless steel is used.

Next is on the outsides of the second metal band 30 a third metal band 40 arranged to the second metal band 30 to protect against damage and / or contamination. The second and the third metal band 30 ; 40 are preferably cohesively connected to each other and most preferably glued together. Preferably, said adhesive bond is produced by means of a so-called transfer adhesive tape, wherein preferably an adhesive layer without carrier is used. The thickness of the fourth metal band 50 is preferably small and in particular smaller than that of the first, the second or the fourth metal strip 20 ; 30 ; 50 selected so that the sensor (No. 63 in 6 ) as close as possible to the second metal band 30 can be arranged. The third metal band 40 is preferably made of a non-magnetic material whose relative magnetic permeability is most preferably between 0.5 and 2. This will cause a weakening of the signals on the sensor (# 63 in 6 ) largely avoided by the third metal band 40. The third metal band 40 may for example consist of the same material as the first metal strip 20 ,

In the 1 shown distances between the metal bands 20 ; 30 ; 40 ; 50 are solely due to the clarity. In fact, the metal bands lie 20 ; 30 ; 40 ; 50 directly or via an adhesive layer to each other.

2a shows a rough schematic front view of the first metal strip 20 to 1 , 2 B shows that too 2a appropriate top view. The first metal band 20 is made from a flat sheet metal strip of constant thickness. It has a level middle area 21 , which is not deformed during the production. The middle area 21 is between two opposite edge areas 22 arranged, which are bent in the context of production by more than 90 °, for example by 110 °. The bend is designed so that the edge areas 22 under elastic pretensioning on the adapted head side (No. 13 in 1 ) abut the guide rail. The middle area 21 lies indirectly over the fourth metal band on the flat head surface (No. 14 in 1 ) at. In the 2a illustrated cross-sectional shape of the first metal strip 20 is along the longitudinal axis 11 constant.

The in the direction of the longitudinal axis 11 pointing band ends 25 of the first metal strip 20 are preferably according to the DE 103 18 612 B4 whose entire content is referred to and incorporated in the present application. Accordingly, the first metal band 20 formed longer than the guide rail, wherein the band ends 25 at both longitudinal ends of the first metal band 20 are present, be bent during assembly. To facilitate the bend, the band ends 25 each tapered to a rounded point. In the area of the band ends 25 are therefore the border areas 22 cut away.

The first metal band 20 has an inside 24 and an opposite outside 23 , The inside 24 points in the same direction as the bent edge areas 22 ,

3a shows a rough schematic front view of the second metal strip 30 to 1 , 3b shows that too 3a appropriate top view. The second metal band 30 is formed in the form of a flat sheet metal strip with a constant thickness. It extends over the entire width of the flat top surface (No. 14 in 1 ) of the guide rail. In the direction of the longitudinal axis 11 it is preferably formed as long as the main body of the guide rail, wherein it is preferably rectangular in plan view. It has a large number of identical breakthroughs 31 , which periodically along the longitudinal axis 11 are arranged distributed. The breakthroughs 31 are preferably rectangular. In the direction of the longitudinal axis 11 can the width of the breakthroughs 31 equal to the width of the webs between the openings 31 be. It However, it is also conceivable to use slightly different dimensions to detect signal errors on the sensor (No. 63 in 6 ) to compensate.

4a shows a rough schematic front view of the third metal band 40 to 1 , 4b shows that too 4a appropriate top view. The third metal band 40 is formed in the form of a flat sheet metal strip with a constant thickness. It extends over the entire width of the flat top surface (No. 14 in 1 ) of the guide rail. Its width is preferably chosen equal to the width of the second metal strip. In the direction of the longitudinal axis 11 it is preferably as long as the main body of the guide rail or as the second metal strip formed, wherein it is preferably rectangular in plan view.

5a shows a rough schematic front view of the fourth metal strip 50 to 1 , 5b shows that too 5a appropriate top view. The fourth metal band 50 is formed in the form of a flat sheet metal strip with a constant thickness. It extends over the entire width of the flat top surface (No. 14 in 1 ) of the guide rail. Its width is preferably chosen equal to the width of the second metal strip. In the direction of the longitudinal axis 11 it is preferably as long as the main body of the guide rail or as the second metal strip formed, wherein it is preferably rectangular in plan view. The third and fourth metal bands preferably have the same outline. With regard to the thickness and the material, differences are preferably present, as already explained above.

6 shows a rough schematic side view of a linear guide 65 with a guide rail 10 to 1 , The linear guide 65 includes a guide carriage 60, which in the direction of the longitudinal axis 11 movable on the guide rail 10 is stored. In the present embodiment run in the carriage 60 for this four rows of spherical rolling elements endlessly around. A corresponding carriage 60 is for example from the DE 10 2014 210 171 A1 known. The carriage 60 includes a main body 61 made of steel, at the two opposite ends in the direction of the longitudinal axis in each case an end cap 62 made of plastic. The carriage 60 is viewed in cross-section U-shaped with a base and two legs. The base of the main body 61 is on the guide rail 10 facing side provided with a recess in which the sensor 63 is included. The sensor 63 is via a connection cable 64 connected to a (not shown) higher-level control device. The sensor 63 For example, according to the EP 729 562 B1 or the AT 1301 U1 be constructed, with both versions with the material measure or the second metal strip after 3a and 3b are usable.

7 shows a rough schematic front view of a guide rail 10 according to a second embodiment of the invention. The first and the second embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 7 are the same or corresponding parts provided with the same reference numerals. The third metal band 40 is directly on the head area 14 of the basic body 16 glued. The second metal band 30 is narrower than the third metal band 40 running, being in a customized head groove 17 the guide rail 10 is included. The head groove 17 is not present in the first embodiment. The second metal band 30 is stuck with the third metal band 40 connected, in particular glued or welded.

8th shows a rough schematic front view of a guide rail 10 according to a third embodiment of the invention. The first and the third embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 8th are the same or corresponding parts provided with the same reference numerals. The third metal band 40 is directly on the head area 14 of the basic body 16 hung up. The second metal band 30 is narrower than the third metal band 40 Running, it being from a tape measure carrier 70 is enclosed, which firmly with the third metal band 40 connected is. The tape measure carrier 70 is considered dovetailed in cross-section, wherein it is in a customized head groove 17 is included. Preferably, the tape measure carrier 70 with the third metal band 40 in the direction of the longitudinal axis 11 in the head groove 17 inserted.

9 shows a rough schematic front view of a guide rail 10 according to a fourth embodiment of the invention. The first and the fourth embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 9 are the same or corresponding parts provided with the same reference numerals. The third metal band 40 is directly on the second metal band 30 glued. The second metal band 30 is again on the top surface 14 of the body 16 glued. The second and the third metal band 30 ; 40 are formed according to the first embodiment.

10 shows a rough schematic front view of a guide rail 10 according to a fifth embodiment of the invention. The first and the fifth embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 10 are the same or corresponding parts provided with the same reference numerals. The main body 16 is with a dovetail-shaped head groove 17 Mistake. In the head groove 17 is an adapted tape measure carrier 70 clipped, which is designed as a bent sheet metal part. The second metal band 30 is with the tape measure carrier 70 firmly connected, in particular glued or welded.

11 shows a rough schematic front view of a guide rail 10 according to a sixth embodiment of the invention. The first and the sixth embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 11 are the same or corresponding parts provided with the same reference numerals. The main body 16 is with a dovetail-shaped head groove 17 Mistake. In the head groove 17 is an adapted tape measure carrier 70 clipped, which is designed as a bent sheet metal part. The second metal band 30 is with the tape measure carrier 70 firmly connected, in particular glued or welded. The third metal band 40 is in turn with the second metal band 30 firmly connected, in particular glued or welded.

12 shows a rough schematic front view of a guide rail 10 according to a seventh embodiment of the invention. The first and the seventh embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 12 are the same or corresponding parts provided with the same reference numerals. The first metal band 20 is on the body 16 clipped, being directly on the head surface 14 of the basic body 16 rests. The second metal band 30 is narrower than the first metal band 20 running, being in a customized head groove 17 the guide rail is added. The second metal band 30 is stuck with the first metal band 20 connected, in particular glued or welded.

13 shows a rough schematic front view of a guide rail 10 according to an eighth embodiment of the invention. The first and the eighth embodiment are identical except for the differences described below, so that in this regard to the comments on 1 to 5 is referenced. In the 1 to 5 and 13 are the same or corresponding parts provided with the same reference numerals. The main body 16 is with a dovetail-shaped head groove 17 Mistake. In the head groove 17 is an adapted tape measure carrier 70 clipped, which is designed as a bent sheet metal part. The second metal band 30 is with the tape measure carrier 70 firmly connected, in particular glued or welded. Next is a separate first metal band 20 provided, which on the main body 16 is clipped.

LIST OF REFERENCE NUMBERS

10

guide rail

11

longitudinal axis

12

Rail raceway

13

head

14

head face

15

mounting hole

16

body

17

head groove

18

plane of symmetry

20

first metal band

21

the central region

22

border area

23

Outside of the first metal band

24

Inside of the first metal band

25

tape end

30

second metal band

31

breakthrough

40

third metal band

50

fourth metal band

60

carriages

61

main body

62

endcap

63

sensor

64

connection cable

65

linear guide

70

Scale carrier

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 6564468 A [0002]
• US 5575566 A [0002, 0014]
• EP 729562 B [0014]
• DE 10318612 B4 [0020]
• DE 102014210171 A1 [0025]
• EP 729562 B1 [0025]
• AT 1301 U1 [0025]

Claims (11)

A guide rail (10) for use with a carriage (60), the guide rail (10) extending along a longitudinal axis (11) having at least one rail track (12) parallel to the longitudinal axis (11), each in rolling contact with a rail associated row of rolling elements in the carriage (60) can be brought, wherein a first, a second and a third metal strip (20; 30; 40) are provided which are each formed separately from each other, wherein they are in the direction of the longitudinal axis (11) along the guide rail (10), wherein the first metal strip (20) has a flat central region (21) which is arranged between two edge regions (22), wherein the edge regions (22) surrounds a head side of the guide rail (10) such that the first metal strip (20) is fixedly connected to the guide rail (10), wherein the second metal strip (30) is planar, wherein it has a plurality of openings (31), which e ntlang the longitudinal axis (11) are arranged distributed, so that they form a material measure, which is scanned by a sensor (63) on the carriage (60), characterized in that the second metal strip (30) cohesively with one of the outside (23 ) of the central region (21) of the first metal strip (20), said outer side (23) facing away from the guide rail (10), the third metal strip (40) being planar, thus being materially cohesive with one of the first Metal strip (20) facing away from the outer side of the second metal strip (30) is connected, that the openings (31) in the second metal strip (30) are covered. Guide rail after Claim 1 wherein a fourth metal band (50) is provided, each formed separately from the first, second and third metal bands (20; 30; 40), extending along the guide rail (10) in the direction of the longitudinal axis (11) wherein the fourth metal strip (50) is planar, abutting directly on a top surface (14) of the guide rail (10), directly or via an adhesive layer on an inner side (24) of the central region (24) opposite the outer side (23). 21) of the first metal strip (20). A guide rail according to any one of the preceding claims, wherein the relative magnetic permeability of the material of the third metal strip (40) is between 0.5 and 2, the relative magnetic permeability of the material of the second metal strip (30) and / or the fourth metal strip (50). between 10 and 500,000. A guide rail (10) for use with a carriage (60), the guide rail (10) extending along a longitudinal axis (11) having at least one rail track (12) parallel to the longitudinal axis (11), each in rolling contact with a rail associated series of rolling elements in the carriage (60) can be brought, wherein a second metal strip (30) is provided which extends in the direction of the longitudinal axis (11) along the guide rail (10), wherein the second metal strip (30) has a plurality of openings (31), which are distributed along the longitudinal axis (11) so that they form a measuring scale, which is scanned by a sensor (63) on the carriage (60), characterized in that the second metal strip (30) a head side (13) of the guide rail (10) is arranged, which is free of rail tracks (12). Guide rail after Claim 4 wherein a third metal strip (40) is provided, which is formed flat and separate from the second metal strip (30), wherein it is materially connected, in particular adhesively bonded, to a top surface of the guide rail (12) and / or to the second metal strip (30); is. Guide rail after Claim 4 or 5 in that a first metal band (20) is provided, which is formed separately from the second metal band (30) and has a planar central area (21) arranged between two edge areas (22), the marginal areas (22) being a head side (12) of the guide rail (10) engage around in such a way that the first metal strip (20) is firmly connected to the guide rail (10). Guide rail after Claim 6 , wherein the second metal strip (30) with the first metal strip (20) integrally connected, in particular welded or glued. Guide rail according to one of Claims 4 to 7 wherein the guide rail (10) has a head groove (17) which extends on the head side (13) parallel to the longitudinal axis (11), wherein the second metal strip (30) in the head groove (17) is arranged. Guide rail after Claim 8 , wherein the head groove (17) is dovetail-shaped, wherein the second metal band (30) is part of a measuring tape carrier (70), the outer shape of which is adapted to the head groove (17), wherein the measuring tape carrier (70) has a positive fit in the head groove (17). is held. Guide rail after Claim 9 , wherein the measuring tape carrier (70) is formed so that it Direction of the longitudinal axis (11) in the head groove (17) can be inserted. Guide rail after Claim 9 wherein the measuring tape carrier (70) is formed so that it can be clipped into the head groove (17).

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