DE102019212497A1 - Guide carriage for a linear guide - Google Patents

Abstract

Disclosed is a guide carriage (1) for a linear guide with at least one first guide carriage part (2) with at least a first and a second axially extending running groove (8a, 10a, 12a, 14a; 8b, 10b, 12b, 14b), and a second Guide carriage part (4) with at least one first and one second axially extending running groove, a lubricant supply element (6) being arranged between the first guide carriage part (2) and the second guide carriage part (4), which has a first axially extending connecting running groove (18a, 20a , 22a, 24a) and a second axially extending connecting raceway groove (18b, 20b, 22b, 24b), which on a first axial side with the first and second raceway grooves (8a, 10a, 12a, 14a; 8b, 10b, 12b, 14b) of the first guide carriage part (2) and on a second axial side with the first and second running grooves of the second guide carriage part (4) are connected, and wherein the lubricant supply element (6) at least one lubricant z has uführkanal (16) which is fluidically connected to at least one connecting groove (18a, 20a, 22a, 24a; 18b, 20b, 22b, 24b) is connected.

Description

The present invention relates to a guide carriage for a linear guide according to the preamble of patent claim 1.

Linear guides or linear roller bearings are used in a wide variety of fields of application and are regularly used for linear guidance of a component to be moved, for example a part of a machine tool. Such a linear guide usually consists of a guide rail and a carriage that runs on roller bearings on this guide rail. On the carriage side, at least two endless rolling element grooves are provided in which rolling elements, for example balls or rollers, revolve, each rolling element groove having a load-bearing groove section (also called an outward run), in which the rolling elements running on the rail are accommodated, and a load-free section (also called a return run) ), along which the rolling elements are returned. The rolling elements are to be deflected accordingly at the axial ends of the carriage so that an endless groove results. For this purpose, two head pieces or end caps are provided on the end of the carriage, which have the respective deflection pieces.

In order to keep frictional resistance as low as possible, lubrication can take place, so that a lubricating film is formed on the running surfaces of the rail as well as on the rolling elements. The lubrication usually takes place on the end caps in the area of the respective deflection pieces.

However, it is possible that sufficient lubrication cannot be guaranteed over the entire length of the carriage. This can happen, for example, with long guide carriages in which the lubrication breaks off within the guide carriage and / or in the case of short travels of the guide carriage where there is a risk that the supplied lubricant will not be transported into a load-bearing part of the guide carriage.

It is therefore the object of the present invention to provide an improved guide carriage, in particular an improved lubricant supply element, for a linear guide in which lubrication can be ensured over the entire length of the guide carriage.

This object is achieved by a guide carriage for a linear guide according to patent claim 1.

In the following, a guide carriage for a linear guide with at least one first guide carriage part with at least a first and a second axially extending running groove and a second guide carriage part with at least a first and a second axially extending running groove is proposed. In order to ensure lubrication over the entire length of the guide carriage, it is proposed to arrange a lubricant supply element between the first guide carriage part and the second guide carriage part, which has a first axially extending connecting running groove and a second axially extending connecting running groove which is on a first axial side with the first and second running groove of the first guide carriage part and are connected on a second axial side to the first and second running grooves of the second guide carriage part, and wherein the lubricant supply element has at least one lubricant supply channel which is fluidically connected to at least one connecting running groove. The running grooves of the respective guide carriage parts and the connecting running grooves are preferably connected to one another in alignment. A guide carriage can be understood to mean a section or part of a guide carriage or a connection of several guide carriage parts.

The arrangement of the lubricant supply element between the first and second guide carriage parts has the further advantage that the rolling elements pass through the lubricant supply element linearly. That is, a lubricant supply no longer takes place at the end of a guide carriage, but can instead take place in the guide carriage itself. As a result, on the one hand, greater flexibility is achieved with regard to the positionability of the lubricant supply and, on the other hand, an improved supply of lubricant can take place even with long guide carriages, so that the probability that a lubricant film breaks off within a long guide carriage can be reduced. This is due to the fact that a long guide carriage can be divided and the lubricant supply element can be arranged between the two guide carriage parts. Even with short travels of the guide carriage, where there is a risk that the supplied lubricant is not transported into the load-bearing part of the guide carriage, the proposed guide carriage allows the lubricant to be used directly before and / or after the higher flexibility with regard to the positioning of the lubricant supply to feed the load-bearing part of the guide carriage. In other words, the lubricant can be supplied closer to the load-bearing part of the guide carriage. Furthermore, the lubrication in a linear section enables the lubricant to be better distributed on the rolling elements.

The supply of the lubricant to the lubricant supply element itself can be made possible, for example, via a lubricant reservoir arranged in the lubricant supply element. As an alternative or in addition, the lubricant supply element can also have a main lubricant line which is connected to the reservoir as required or permanently. The reservoir can then also be arranged at a remote location.

According to a preferred embodiment, a plurality of first and second running grooves are formed on the first and second guide carriage parts and a plurality of first and second connecting running grooves are formed on the lubricant supply element, each connecting the first and second running grooves of the first and second guide carriage parts. As a result, guidance of the guide carriage on the rail can be improved, since the loads are distributed over several running grooves.

According to a further preferred exemplary embodiment, the lubricant supply channel is fluidically connected to a plurality of first and / or to a plurality of second connecting running grooves.

This has the advantage that one lubricant channel can easily supply lubricant to several connecting running grooves. In particular, the number of first and / or second connecting running grooves that are fluidically connected to the lubricant supply channel can be dependent on the lubricant requirement.

Alternatively, of course, a plurality of lubricant supply channels can also be assigned to a connecting running groove. As a result, lubricant can be supplied over the entire length of the lubricant supply element, which improves the overall lubrication. Furthermore, circumferential feed positions, in particular around a connecting running groove, can also be implemented for the lubricant.

According to a further preferred exemplary embodiment, each first and / or second connecting running groove is connected to one or more separate lubricant supply channels.

In this way, each connecting running groove can advantageously be supplied with lubricant via one or more separate lubricant supply channels. In particular, an individual lubricant requirement of a respective connecting running groove can thus be addressed.

According to a further preferred embodiment, the first running grooves and the first connecting running groove are designed as guide grooves for at least one rolling element, the rolling element being designed to contact a rail along which the guide carriage can be moved and to support the guide carriage so that it can be moved relative to the rail . In addition, the second running grooves and the second connecting running groove are designed as return grooves in which the at least one rolling element is guided to the rail without contact. One or more rolling elements are preferably provided, which can be in the form of a rolling element chain, for example. The rolling elements can be, for example, balls, rollers, needles or other rolling elements.

The lubricant can preferably be fed in a targeted manner to the inlet groove and / or the return groove. The supply to the inlet groove has the advantage that the lubricant can be brought directly to a contact area between the element and the rail, so that a state in which there is a lack of lubricant can be prevented in a simple manner. In contrast, the supply of the lubricant to the return groove has the advantage that a loss of lubricant can be minimized due to the load-free contact between the return groove and the rail.

It is particularly advantageous that the at least one lubricant supply channel is fluidically connected to at least one return groove and / or each lubricant supply channel is connected to a respective return groove.

According to a further preferred embodiment, the lubricant supply element furthermore has at least one receptacle in which and / or on which a lubricant metering element which is designed to meter a defined amount of lubricant and / or a sensor which is designed to supply a lubricant monitor, is attachable.

In this way, in particular, a defined amount of lubricant can be supplied to one or more running grooves via the one or more lubricant supply channels. In addition, a lubricant supply can be monitored directly in the lubricant supply element.

Furthermore, receptacles for sensor signal lines and / or sensor signal evaluation electronics can also be provided in the lubricant supply element. Alternatively, the sensor signals can also be transmitted wirelessly.

According to a further preferred embodiment, the lubricant metering element is a metering piston or a metering insert, in which the lubricant is metered in via a defined piston stroke of a metering piston.

According to a further preferred exemplary embodiment, a lubricant metering element is assigned to each lubricant feed channel.

This has the advantage that an individually adjustable amount of lubricant can be supplied to each lubricant supply channel. In particular, the amount of lubricant that is supplied to a respective running groove can thus be individually defined.

In particular, all lubricant metering elements can be connected to the main lubricant line and / or the reservoir.

According to a further preferred exemplary embodiment, a sensor is assigned to each lubricant supply channel and / or a sensor is assigned to each lubricant metering element.

Because there is a clear assignment of sensor and lubricant supply channel and / or of sensor and lubricant metering element, an individually definable lubricant supply situation can advantageously be monitored for a corresponding connecting groove.

According to a further preferred embodiment, each lubricant metering element and / or each sensor is received in a separate receptacle, the receptacle preferably being designed as a recess in the lubricant feed element so that the lubricant metering element and / or the sensor can be integrated into the lubricant feed element .

As a result, the lubricant supply element can advantageously be made more compact. For example, the recess can be drilled and / or milled into the lubricant supply element. Alternatively or additionally, the lubricant supply element including its recesses or receptacles and / or channels can also be produced with the aid of an additive production method.

According to a further preferred exemplary embodiment, the second guide carriage part is designed as an end cap of the guide carriage, a first and second running groove of the end cap being connected via a deflecting track.

Further advantages and advantageous embodiments are specified in the description, the drawings and the claims. In particular, the combinations of features specified in the description and in the drawings are purely exemplary, so that the features can also be present individually or in a different combination.

In the following, the invention is to be described in more detail with reference to the exemplary embodiments shown in the drawings. The exemplary embodiments and the combinations shown in the exemplary embodiments are purely exemplary and are not intended to define the scope of protection of the invention. This is defined solely by the pending claims.

• 1: eine schematische, perspektivische Ansicht eines Führungswagens für eine Linearführung gemäß eines Ausführungsbeispiels.
• 2: eine Seitenansicht eines Schmiermittelzuführelements des Führungswagens für eine Linearführung aus 1.
• 3: eine Schnittansicht entlang der Linie A-A in 2.
• 4: eine Schnittansicht entlang der Linie B-B in 2.

Show it:

• 1 : a schematic, perspective view of a guide carriage for a linear guide according to an embodiment.
• 2 : a side view of a lubricant supply element of the guide carriage for a linear guide 1 .
• 3 : a sectional view along the line AA in 2 .
• 4th : a sectional view along the line BB in FIG 2 .

Identical or functionally equivalent elements are identified below with the same reference symbols.

1 shows a schematic, perspective view of a guide carriage 1 for a linear guide according to an embodiment. The guide carriage 1 for a linear guide comprises a first guide carriage part 2 with four axially extending pairs of raceways 8th , 10 , 12 , 14th each with a first running groove 8a , 10a , 12a , 14a , and a second running groove 8b , 10b , 12b and 14b .

The guide carriage 1 is set up to be guided on a rail (not shown), the first running grooves in each case 8a , 10a , 12a , 14a of the pairs of grooves 8th , 10 , 12 , 14th are designed as a guide groove in which several rolling elements (not shown) are guided, which are in contact with the rail and are designed to support the guide carriage 1 to be stored on the rail so that the carriage 1 is movable along the rail. The second grooves 8b , 10b , 12b , 14b of the pairs of grooves 8th , 10 , 12 , 14th are designed as return grooves in which the multiple rolling elements are guided without contact with the rail.

The guide carriage also includes 1 a second guide carriage part 4th , which, as shown, can be designed as an end cap, with a deflecting track (not shown) being provided which forms the respective guide groove 8a , 10a , 12a , 14a with the corresponding return groove 8b , 10b , 12b , 14b connects. Alternatively, the second guide carriage part 4th , like the first guide carriage part 2 take on a load-bearing function.

Between the first guide carriage part 2 and the second guide carriage part 4th is a Lubricant supply element 6th arranged in 2 is shown in side view.

The lubricant supply element 6th also has pairs of axially extending connecting grooves 18a , 18b , 20a , 20b , 22a , 22b , 24a , 24b who have made the approach grooves 8a , 10a , 12a , 14a and the return grooves 8b , 10b , 12b , 14b of the first guide carriage part 2 Connect with the inlet grooves and the return grooves of the second guide carriage part.

Like the leading grooves 8a , 10a , 12a , 14a are also the connecting grooves 18a , 20a , 22a , 24a of the lubricant supply element 6th set up to bring the rolling elements guided in the running grooves into contact with the rail, whereas the connecting running grooves 18b , 20b , 22b , 24b like the return grooves 8b , 10b , 12b , 14b guide the rolling elements without contact with the rail. The pairs of running grooves are preferred 8th , 10 , 12 , 14th of the first guide carriage part 2 and the connecting grooves 18a , 18b , 20a , 20b , 22a , 22b , 24a , 24b of the lubricant supply element 6th designed in alignment with each other. Furthermore, the connection grooves are 18a , 18b , 20a , 20b , 22a , 22b , 24a , 24b and the pairs of running grooves of the second guide carriage part 4th designed in alignment with each other.

The lubricant supply element 6th furthermore has at least one lubricant supply channel 16 ( 3 , 4th ), wherein in the embodiment shown, each of the four connecting groove pairs 18a , 18b , 20a , 20b , 22a , 22b , 24a , 24b each is connected to a lubricant supply channel. For a better overview, the 3 and 4th only one lubricant feed channel 16 shown.

Each of the lubricant supply channels 16 is fluidic with an associated connecting groove 18a , 18b , 20a , 20b , 22a , 22b , 24a , 24b connected. The lubricant feed channels are preferred 16 fluidically with the return grooves 8b , 10b , 12b , 14b associated connecting grooves 18b , 20b , 22b , 24b connected. Additionally or alternatively, the lubricant supply channels can also be fluidically connected to the inlet grooves 8a , 10a , 12a , 14a associated connecting grooves 18a , 20a , 22a , 24a be connected.

The respective lubricant supply channels are preferred 16 provided separately from one another, so that a clear assignment between the lubricant supply channel 16 and the associated connecting groove 18a , 20a , 22a , 24a , 18b , 20b , 22b , 24b consists. It is of course also possible to have several connecting grooves 18a , 20a , 22a , 24a , 18b , 20b , 22b , 24b fluidically with the same lubricant feed channel 16 to connect or a connecting groove 18a , 20a , 22a , 24a , 18b , 20b , 22b , 24b several lubricant supply channels 16 assign. For example, the closed connection running grooves 18b and 20b be supplied with lubricant on one side of the rail via the same lubricant feed channel.

3 FIG. 13 shows a sectional view along the line AA in FIG 2 , while 4th a sectional view along the line BB in 2 shows. Again 3 can be removed are in the lubricant supply element 6th four lubricant metering elements 26th , 28 , 30th , 32 integrated.

The lubricant metering elements 26th , 28 , 30th , 32 are designed to meter a defined amount of lubricant. Each lubricant metering element is here 26th , 28 , 30th , 32 with one of the lubricant supply channels 16 fluidically connected (see 4th ). Alternatively, a lubricant metering element can also be used 26th , 28 , 30th , 32 be connected to several lubricant supply channels. The lubricant metering elements 26th , 28 , 30th , 32 themselves are via a main lubricant duct 34 that has a main lubricant line connection 36 is connected, supplied with lubricant. Alternatively, any lubricant metering element can also be used 26th , 28 , 30th , 32 be supplied with lubricant via a separate feed line.

To the lubricant supply to the connecting grooves 18a , 20a , 22a , 24a , 18b , 20b , 22b , 24b are to be monitored in the lubricant supply element 6th Sensor mounts 38 ( 4th ), which are designed to each have a sensor 40 record. The sensor 40 can in particular be suitable for monitoring a lubricant flow or a lubricant supply.

The sensor signals of the sensor 40 are via sensor signal lines 42 to a sensor signal evaluation electronics 44 ( 2 ), which is set up to evaluate the sensor signals accordingly and to provide the evaluation data. The sensor signal evaluation electronics can preferably 44 into the lubricant supply element 6th be integrated. For example, a receptacle can be provided into which the lubricant supply element 6th is recordable. Alternatively or additionally, the sensor signals can also be transmitted wirelessly. A sensor with an associated sensor receptacle is preferably provided for each lubricant feed channel. Additionally or alternatively, a sensor can also be provided for each lubricant metering element.

In summary, a lubricant supply element 6th provided between a first guide carriage part 2 and a second guide carriage part 4th of the guide carriage 1 is provided so that the rolling elements of a linear guide the lubricant supply element 6th run through. As a result, on the one hand, greater flexibility is achieved with regard to the positionability of the lubricant supply and, on the other hand, an improved supply of lubricant can take place even with long guide carriages.

Furthermore, each lubricant supply channel 16 one lubricant metering element each 26th , 28 , 30th , 32 as well as a sensor can be assigned so that each lubricant supply channel 16 an individually adjustable amount of lubricant can be supplied and this amount can also be monitored individually, so that a respective lubricant supply situation can be controlled and monitored for a corresponding running groove.

List of reference symbols

1

Guide carriage

2

first guide carriage part

4th

second guide carriage part

6th

Lubricant supply element

8, 10, 12, 14

Pair of running grooves

8a, 10a, 12a, 14a

Inward groove

8b, 10b, 12b, 14b

Return groove

16

Lubricant feed channel

18a, 20a, 22a, 24a

Connecting groove (outward)

18b, 20b, 22b, 24b

Connecting groove (return)

26, 28, 30, 32

Lubricant metering element

34

Lubricant main duct

36

Lubricant main line connection

38

Sensor mount

40

sensor

42

Sensor signal lines

44

Sensor signal evaluation electronics

Claims (10)

Guide carriage (1) for a linear guide with at least one first guide carriage part (2) with at least one first and one second axially extending running groove (8a, 10a, 12a, 14a; 8b, 10b, 12b, 14b), and a second guide carriage part (4 ) with at least a first and a second axially extending running groove, characterized in that a lubricant supply element (6) is arranged between the first guide carriage part (2) and the second guide carriage part (4), which has a first axially extending connecting running groove (18a, 20a , 22a, 24a) and a second axially extending connecting raceway groove (18b, 20b, 22b, 24b) which on a first axial side with the first and second raceway grooves (8a, 10a, 12a, 14a; 8b, 10b, 12b, 14b) of the first guide carriage part (2) and on a second axial side with the first and second running grooves of the second guide carriage part (4), and wherein the lubricant supply element (6) has at least one lubricant has ttelzuführkanal (16) which is fluidically connected to at least one connecting groove (18a, 20a, 22a, 24a; 18b, 20b, 22b, 24b) is connected. Guide carriage (1) according to Claim 1 , wherein a plurality of first and second running grooves (8a, 10a, 12a, 14a; 8b, 10b, 12b, 14b) are formed on the first and second guide carriage parts (2, 4) and a plurality of first and second connecting running grooves (6) are formed on the lubricant supply element (6). 18a, 20a, 22a, 24a; 18b, 20b, 22b, 24b) which connect the first and second running grooves of the first and second guide carriage parts (2, 4). Guide carriage (1) according to Claim 1 or 2 , wherein the lubricant supply channel (16) is fluidically connected to a plurality of first and / or to a plurality of second connecting running grooves (18a, 20a, 22a, 24a, 18b, 20b, 22b, 24b). Guide carriage (1) according to Claim 1 or 2 , wherein each first and / or second connecting running groove (18a, 20a, 22a, 24a; 18b, 20b, 22b, 24b) is connected to one or more separate lubricant supply channels (16). Guide carriage (1) according to one of the preceding claims, wherein the first running grooves (8a, 10a, 12a, 14a) and the first connecting running groove (18a, 20a, 22a, 24a) are designed as run-in grooves for at least one rolling element, the rolling element designed for this purpose is to contact a rail along which the guide carriage (1) is movable and to support the guide carriage (1) movably relative to the rail, and the second running grooves (8b, 10b, 12b, 14b) and the second connecting running groove (18b , 20b, 22b, 24b) are designed as return grooves, in which the at least one rolling element is guided to the rail without contact, the at least a lubricant supply channel (16) is fluidically connected to at least one return groove (18b, 20b, 22b, 24b) and / or each lubricant supply channel (16) is connected to a respective return groove (18b, 20b, 22b, 24b). Guide carriage (1) according to one of the preceding claims, wherein the lubricant supply element (6) furthermore has at least one receptacle in which and / or on which a lubricant metering element (26, 28, 30, 32), which is designed to have a defined To meter the amount of lubricant, and / or a sensor (40) designed to monitor a supply of lubricant can be attached. Guide carriage (1) according to Claim 6 wherein a lubricant metering element (26, 28, 30, 32) is assigned to each lubricant supply channel (16). Guide carriage (1) according to Claim 6 or 7th wherein a sensor (40) is assigned to each lubricant supply channel (16) and / or each lubricant metering element (26, 28, 30, 32) is assigned a sensor (40). Guide carriage (1) according to one of the Claims 6 to 8th , wherein each lubricant metering element (26, 28, 30, 32) and / or each sensor (40) is received in a separate receptacle, the receptacle preferably being designed as a recess in the lubricant supply element (6) so that the lubricant -The metering element (26, 28, 30, 32) and / or the sensor (40) can be integrated into the lubricant supply element (6). The guide carriage (1) according to one of the preceding claims, wherein the second guide carriage part (4) is designed as an end cap of the guide carriage (1), a first and second running groove of the end cap being connected via a deflection path.

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