DE102022000249A1 - Linear profile and linear unit - Google Patents

Abstract

The invention relates to a linear profile and a linear unit with such a linear profile. The linear profile has a U-basic contour with a bottom section and a first and a second cheek section and is characterized in particular in that the linear profile has a first and second adaptive runner carrier receiving zone (5, 6), that the first adaptive runner carrier receiving zone (5) on a distal end of the first cheek section (3) and the second adaptive rotor carrier receiving zone (6) is arranged at a distal end of the second cheek section (4), that the first adaptive rotor carrier receiving zone (5) has a planar first cover surface (5.1) and a first solid body (5.2 ) and the second adaptive rotor carrier receiving zone (6) has a second cover surface (6.1) and a second solid body (6.2) and that the cover surfaces (5.1, 6.1) each delimit the respective solid body (5.2, 6.2) distally, that the cover surfaces (5.1, 6.1) are designed to accommodate a rotor carrier designed as a guide rail (7), and that a V-receiving groove (5.3, 6.3) can be inscribed in the respective solid body (5.2, 6.2) on the top surface side and can be machined from the respective solid body (5.2, 6.2 ) can be produced, the respective V-receiving groove (5.3, 6.3) being designed to receive a rotor carrier designed as a guide shaft (8).

Description

The invention relates to a linear profile, in particular as an aluminum extruded profile, and to a linear unit having such a linear profile.

Linear units as such are known from the prior art. They have a linear guide unit and a linearly movable unit, the carriage. There are known solutions to form the basic component of the linear guide unit as an aluminum extruded profile. In particular, guide rails and guide shafts are used as rotor carriers. There are different requirements of guide rails and guide shafts on the linear profile. It is disadvantageous that different types of linear profiles for different requirements, in particular for different runner carriers, have to be kept available.

The object of the invention is to present a universal linear profile that is suitable for linear units with different precision, speed or load requirements and that can be produced inexpensively and easily. Furthermore, it is the object of the invention to specify linear guide units with which different precision, speed or load requirements can be met and which can be provided with the same linear profile.

The object is achieved with respect to the linear profile by the features listed in patent claim 1 and with respect to the linear unit by the features listed in patent claim 4 or 5 . Preferred developments result from the respective dependent claims.

In a manner known per se, the linear profile according to the invention has a longitudinal extent and a U-shaped basic contour. The linear profile is also preferably designed as an aluminum extruded profile.

The basic U contour is formed by a bottom section and a first and a second cheek section. The two cheek sections are the two side legs of the U. In an advantageous embodiment, the two cheek sections can be embodied symmetrically. However, it is also possible to design the cheek sections to differ from one another.

Furthermore, the U-basic contour spans a longitudinal profile interior. The interior of the profile is designed to accommodate a linear drive.

In this case, the profile interior is designed according to its geometry in such a way that a linear drive can be accommodated, which is designed as a drive from the group: linear motor, spindle drive and toothed belt drive.

The linear profile according to the invention is characterized in particular by a first adaptive runner receiving zone and a second adaptive runner receiving zone. Here, the first adaptive slider receiving zone is arranged at a distal end of the first cheek section and the second adaptive slider receiving zone is arranged at a distal end of the second cheek section.

In the present case, distal is understood to mean a directional indication pointing away from the base section on a cheek section, transversely to a main longitudinal axis of the linear profile.

The two adaptive runner receiving zones are designed essentially the same. According to the invention, the first adaptive rotor carrier receiving zone has a planar first top surface and a first solid body, and the second adaptive rotor carrier receiving zone has a second top surface and a second solid body. The first cover surface distally bounds the first solid body and the second cover surface distally bounds the second solid body. In the further description, the position designation at the top is also used for the top surfaces, regardless of an installation position, and the position designation at the bottom is also used for the bottom section.

In the following, guide rails and guide shafts are collectively referred to as runner supports. You are in direct contact with a runner unit. The runner unit is moved linearly on the guide rails or guide shafts, so that the linearity of the design of the runner carrier determines the linearity of the movement of the runner unit. The guide rails are preferably designed as steel rails and the guide shafts are preferably designed as steel shafts.

The adaptive rotor receiving zones are further characterized in that, firstly, the top surfaces are designed to accommodate a rotor carrier designed as a guide rail and secondly that a V-receiving groove can be inscribed in the respective solid body on the top surface side and can be produced from the solid body by means of subtractive machining, with the V-receiving groove being designed to receive a rotor carrier designed as a guide shaft.

The first and the second top surface are preferably arranged plane-parallel to one another and particularly preferably in a common plane. This common plan level also forms the top of the profile interior. The guide rails can be accommodated in a manner known per se, for example by gluing, screwing or riveting.

According to the invention, the two solid bodies are designed according to the geometry of their cross section in such a way that there is space for a V-receiving groove for a guide shaft and that this V-receiving groove can be produced by subtractive machining, in particular by milling. In this sense, a V-receiving groove is to be understood as a groove into which a guide shaft can be inserted linearly and fastened there.

Thus, a rotor carrier, which is designed as a guide rail, can be accommodated by means of the top surface, and a rotor carrier, which is designed as a guide shaft, can be accommodated by means of the solid body.

The solid body with its distal cover surface surprisingly found a simple means with which the two important types of runner carriers in practice, namely guide rail and guide shaft, can be arranged on the same linear profile. The problem existing according to the prior art was thus advantageously solved, that different linear profiles had to be kept ready for linear guide units with guide rails and for linear guide units with guide shafts.

In this context, it is also particularly advantageous that the solid body with a cover surface simultaneously allows adaptation to the different load requirements without additional measures.

Linear units with guide rails are selected when particularly high forces, such as machining forces in particular, have to be applied or when high precision is required. When used for guide rails, the assembly takes place on the top surface and the solid body is not weakened, but is available for high torsional rigidity and reliable application of force from the guide rails to the linear profile. Linear units with guide shafts are selected for applications with high travel speeds, where there are lower requirements for force absorption or precision. When used for guide shafts, the solid body is indeed weakened by the introduction of the V-receiving groove. However, this is not a problem because of the lower force or precision requirements. Instead, the geometry reservoir of the solid body is used efficiently to create a reliable positioning of the guide shafts in the V-groove.

Furthermore, with the linear profile according to the invention, a universal linear profile is also found in relation to the drive types that can be installed.

According to a first advantageous development, the linear profile has busbar grooves for accommodating busbars.

Advantageously, a continuous power supply to the rotor unit can be ensured via sliding contacts, this being carried out particularly advantageously without a drag chain. The problems of wear and tear or inapplicability at very high speeds or high accelerations, which are known with drag chains, are thus avoided.

The power supply can be intended both directly for the runner unit, so that a linear drive with an active runner can be used advantageously. However, it is also possible to supply other applications managed by the runner, such as additional axes or handling units, in addition or instead.

According to the invention, there can be a higher number of busbars, so that several independent circuits or loads can be supplied.

According to another advantageous development, the linear profile is characterized in that it has measuring system grooves for receiving a reference strip of a displacement sensor.

Longitudinal carriers of magnetic or optical increments, for example, are understood as reference strips of a displacement sensor. The measuring system grooves enable their arrangement along the longitudinal extent of the linear profile, so that when used as intended in a linear unit, a runner unit can pick up the reference strips, in particular magnetically, optically or mechanically. In this way, the linear position of such a runner unit can be determined.

According to this development, it is particularly advantageous that on the one hand a simple, time-saving and cost-effective assembly of reference strips is possible and on the other hand a precise arrangement of the reference strips parallel to the direction of movement of a rotor unit is ensured without additional measures.

According to an advantageous further development, the linear profile has at least one longitudinal undercut groove for a longitudinal coupling.

The at least one undercut groove is preferably designed as a T-groove and can be arranged both on the bottom section and on the first or second cheek section of the U-basic contour. Preferably, there are a plurality of longitudinal T-slots arranged with different downward and lateral opening orientations.

Two T-grooves are particularly preferably provided in the lower areas of the two cheek sections, each with a lateral opening orientation. This advantageously enables, in particular, a parallel coupling of a plurality of linear profiles, with the coupling being able to take place directly and without a substructure.

Furthermore, according to this development, undercut grooves advantageously at the same time allow for the simple assembly of linearly adjustable limit switches.

According to a further advantageous development, the linear profile has at least one front-side receptacle for front-side coupling.

This front-side receptacle is preferably designed as a front-side opening of a chamber, so that a screw can be screwed in on the front side or a fastening means, in particular a bolt, can be anchored in some other way. Such a chamber can be both closed and open in its cross section.

According to a further aspect of the invention, the technical solution according to the invention relates to a linear unit.

The linear unit according to the invention has a linear guide unit, a runner unit and a drive unit. The rotor unit and the drive unit are designed in a manner known per se.

The linear unit is characterized in that the linear guide unit has a linear profile according to the present invention. It is a linear profile according to one of claims 1 to 5.

In a first alternative of the linear unit, the runner supports are designed as guide rails. The guide rails each have a planar underside of the guide rail. They are fastened with their bottom side of the guide rails to the top surfaces of the adaptive runner support receiving zones.

In this alternative, the solid body of the adaptive rotor support receiving zones remains essentially without any weakening material removal and is thus advantageously available as a stable fastening base for the guide rails and as an additional stiffening section of the linear profile for particularly high torsional rigidity and power transmission. A particularly high power transmission and a particularly high precision can thus be provided.

According to a next aspect of the invention, the technical solution according to the invention also relates to a linear unit.

According to this aspect, the linear unit according to the invention also has a linear guide unit, a runner unit and a drive unit. It is also characterized in that the linear guide unit has a linear profile according to the present invention. It is therefore a linear profile according to one of claims 1 to 5.

In the second alternative of the linear unit presented here, the runner carriers are designed as guide shafts.

In the present second alternative, the adaptive rotor support receiving zones have the V-receiving grooves. In this case, the V-receiving grooves are provided subtractively from the solid bodies on the top surface side. The V-grooves are preferably milled into the solid bodies. The second alternative thus uses the advantage that with the solid bodies a profile section is available which, according to its geometry, immediately provides the space for such V-grooves. The guide shafts are attached to the two V-grooves, and this can be done in any suitable manner of attachment, for example by screwing.

Using the same linear profile as in the first alternative, a linear unit is thus advantageously provided which enables the runner to be moved at high speeds.

According to a first advantageous development, the linear unit is characterized in that the drive unit is designed as a linear motor.

According to a second advantageous development, the linear unit is characterized in that the drive unit is designed as a spindle drive.

According to a third advantageous development, the linear unit is characterized in that the drive unit is designed as a toothed belt drive.

The three developments have the advantage that the linear unit has a particularly high level of versatility and universal applicability for different requirements. In particular, there is the advantage that on the basis of the same linear profile, a linear unit with high adaptivity is shown both with regard to the runner carrier - i.e. guide rails and guide shafts - and with regard to the drive concepts - in particular linear drive, spindle drive and toothed belt drive. In particular, a combination of particularly suitable pairings from the type of rotor carrier and the type of drive concept is possible. For example, based on the same linear profile, a linear unit with guide shafts and toothed belt drive for particularly fast movements, a linear unit with guide rails and spindle drive for particularly high power transmission, or a linear unit with guide rails and linear drive for a space-saving design can be provided.

According to the initial letters of the possible different drive units, the linear profile according to the invention can also be referred to as an LSZ linear profile.

• 1 Linearprofil in Schnittansicht
• 2 Vergrößerungsausschnitt der Wangenabschnitte
• 3 Vergrößerungsausschnitt des ersten Wangenabschnitts nach Herrichtung für eine Führungsschiene
• 4 Vergrößerungsausschnitt des ersten Wangenabschnitts nach Herrichtung für eine Führungswelle
• 5 Vergrößerungsausschnitt des zweiten Wangenabschnitts nach Montage einer Führungsschiene
• 6 Vergrößerungsausschnitt des zweiten Wangenabschnitts nach Montage für einer Führungswelle
• 7 Linearprofil in Schnittansicht mit einer Abdeckung
• 8 Lineareinheit mit Spindeltrieb in Schnittansicht
• 9 Lineareinheit mit Linearmotor in isometrischer Ansicht
• 10 Lineareinheit mit Linearmotor in Schnittansicht
• 11 Lineareinheit mit Spindeltrieb in isometrischer Ansicht
• 12 Lineareinheit mit Zahnriemenantrieb in isometrischer Ansicht näher erläutert.

The invention is illustrated in embodiments based on

• 1 Linear profile in sectional view
• 2 Enlargement section of the cheek sections
• 3 Enlargement of the first cheek section after preparation for a guide rail
• 4 Enlargement of the first cheek section after preparation for a guide shaft
• 5 Enlarged detail of the second cheek section after mounting a guide rail
• 6 Enlargement of the second cheek section after assembly for a guide shaft
• 7 Sectional linear profile with a cover
• 8th Linear unit with spindle drive in sectional view
• 9 Linear unit with linear motor in isometric view
• 10 Linear unit with linear motor in sectional view
• 11 Linear unit with spindle drive in isometric view
• 12 Linear unit with toothed belt drive explained in more detail in an isometric view.

In this case, the same reference symbols in the various figures refer to the same features or components in each case. The reference symbols are also used in the description if they are not shown in the relevant figure.

1 shows the linear profile in an exemplary embodiment as an extruded aluminum profile in its basic structure in an unprocessed state, as provided after extrusion.

The linear profile has a U-basic contour 1 which is formed by the base section 2 and the first cheek section 3 and the second cheek section 4 . All sections 2, 3, 4 are chambered. Due to the U-shape, sections 2, 3, 4 span an upwardly open profile interior 1.1. At the distal ends of the cheek sections 3, 4 are the first adaptive runner support receiving zone 5 and the second adaptive runner support receiving zone 6.

2 shows in an enlarged detail 1 the structure of the two adaptive rotor carrier receiving zones 5, 6, which is essential for the invention. Here, the first adaptive rotor carrier receiving zone 5 has the first solid body 5.2, which is closed at the top by the planar first cover surface 5.1; in the same way, the second adaptive traveler receiving zone 6 has the second solid body 6.2, which is closed at the top by the planar, second top surface 6.1. This is off 2 It can be seen that in each case a V-receiving groove 5.3, 6.3 can be geometrically inscribed in the solid body 5.2, 6.2, which can be incorporated by subtractive machining, in particular by milling.

3 also shows the linear profile in an enlarged detail using the example of the first cheek section 5 in a preparation for providing a linear unit with guide rails 7. In the exemplary embodiment, the first adaptive rotor carrier receiving zone is reworked on the first top surface 5.1 in order to produce a high quality of planarity. Alternatively--not shown here--the respective top surface 5.1, 6.1 can also be post-processed to a lesser degree, so that the cross section of the respective solid body 5.2, 6.2 is reduced to a lesser extent.

4 shows in a comparison 3 in an enlarged section of the first cheek section 5, the linear profile in a preparation for providing a linear unit with guide shafts 8. Here, in the first solid body Milled per 5.2 from the top surface 5.1 forth a V-receiving groove 5.3.

By comparing the 3 and 4 It is shown that a linear unit with both guide rails 7 and alternatively with guide shafts 8 can be provided from one and the same linear profile.

5 shows an enlarged detail - here using the example of the second cheek section 4 - an embodiment of the linear profile with mounted guide rail 7. The guide rail 7 is placed flat on the top surface 6.1 and glued there in the embodiment.

6 shows in a comparison 4 in an enlarged section - here also using the example of the second cheek section 4 - an embodiment of the linear profile with mounted guide shaft 8. The guide shaft 8 is supported laterally by the flanks of the V-receiving groove 6.3 and thus brought into a reliable positional relationship to the linear profile. In the exemplary embodiment, the guide shaft is screwed on.

Continuing the comparison of 3 and 4 also shows the comparison of 5 and 6 that, as a particular advantage, a linear unit can be provided both with guide rails 7 and alternatively with guide shafts 8 from one and the same linear profile.

7 shows the linear profile in a sectional view with an attached cover. The cover is inserted into a longitudinal groove at the distal end of the second cheek portion 4 and is thus reliably supported against deflection. The cover delimits the profile interior 1.1 at the top. Furthermore shows 7 other important features of the linear profile according to the present embodiment.

Here it has a busbar groove 9 . In the exemplary embodiment, this is designed so wide that two busbars for supplying energy to the rotor unit 13 via sliding contacts can be accommodated via an insulating intermediate carrier, as is shown in 8th is evident.

In addition, a measuring system groove 10 is formed on the linear profile and is designed in such a way that one or more reference strips can preferably also be accommodated via an intermediate carrier. Both functional grooves 9, 10 are advantageously arranged on the inside and are thus assigned to the profile interior 1.1, so that both the power supply and the position measuring device are directly accessible to the rotor unit, that there is protection against dirt and damage and that neither installation space nor additional means are required for these functions on the longitudinal outer sides of the linear profile.

Furthermore, the undercut grooves 11 on the longitudinal side and the receptacles 12 on the face side are shown. The five longitudinal undercut grooves 11 in the exemplary embodiment are T-grooves in the present case. Two of the undercut grooves 11 each point outwards in the plane of the base section 2 and are arranged at the transition zone between the base section and the proximal end of the respective cheek sections 3, 4. Additional undercut grooves 11 on the underside of the floor section 2 allow both anchoring of the linear profile to a substructure and the assembly of functional units such as limit switches and the like. The five face mounts 12 in the exemplary embodiment are designed as continuous perforation cross-sections and enable the face assembly, in particular by means of self-tapping screws, of components of a linear drive unit 14, for example.

8th shows an embodiment of a linear unit.

The linear unit has a linear guide unit, a runner unit 13, also referred to as a carriage, and a linear drive unit 14. In this exemplary embodiment, the rotor carriers are designed as guide rails 8 . The linear guide unit has the linear profile according to the invention as a basic component.

9 and 10 show an embodiment of a linear unit with a linear motor as the linear drive unit 14.

11 shows an embodiment of a linear unit with a spindle drive as the linear drive unit 14.

12 shows an embodiment of a linear unit, in which the linear drive unit 14 is designed as a toothed belt drive.

Reference List

1

U basic contour

1.1

profile interior

2

bottom section

3

first cheek section

4

second cheek section

5

first adaptive runner support receiving zone

5.1

first deck surface

5.2

first full body

5.3

first V-groove

6

second adaptive runner support receiving zone

6.1

second deck surface

6.2

second full body

6.3

second V-groove

7

guide rail

8th

guide shaft

9

busbar groove

10

measuring system nut

11

longitudinal undercut groove

12

frontal recording

13

runner unit

14

linear drive unit

Claims (10)

Linear profile, having a longitudinal extension and a U-basic contour (1), wherein the U-basic contour (1) is formed by a base section (2) and a first and a second cheek section (3, 4), wherein the U-basic contour (1) is at least partially chambered and spans a longitudinally extended profile interior (1.1) which is formed to accommodate a linear drive unit (14), the linear drive unit (14) being formed from the group: - linear motor - Spindle drive - Toothed belt drive characterized, that the linear profile has a first and second adaptive rotor carrier receiving zone (5, 6), that the first adaptive rotor carrier receiving zone (5) is arranged at a distal end of the first cheek section (3) and the second adaptive rotor carrier receiving zone (6) at a distal end of the second cheek section (4), that the first adaptive rotor carrier receiving zone (5) has a planar first top surface (5.1) and a first solid body (5.2) and the second adaptive rotor carrier receiving zone (6) has a second top surface (6.1) and a second solid body (6.2) and that the top surfaces ( 5.1, 6.1) delimit the respective solid body (5.2, 6.2) distally, in that the cover surfaces (5.1, 6.1) are designed to accommodate a runner support designed as a guide rail (7), and in that a V-receiving groove (5.3, 6.3) can be inscribed in the respective solid body (5.2, 6.2) on the top surface side and can be produced from the respective solid body (5.2, 6.2) by means of subtractive machining, the respective V-receiving groove (5.3, 6.3) being designed to receive a rotor carrier designed as a guide shaft (8). linear profile claim 1 , characterized in that the linear profile has at least one busbar groove (9) for receiving busbars. Linear profile according to one of the preceding claims, characterized in that the linear profile has at least one measuring system groove (10) for receiving a reference strip of a displacement sensor. Linear profile according to one of the preceding claims, characterized in that the linear profile has at least one longitudinal undercut groove (11) for longitudinal coupling. Linear profile according to one of the preceding claims, characterized in that the linear profile has at least one front-side receptacle (12) for front-side coupling. Linear unit, comprising a linear guide unit, a runner unit (13) and a linear drive unit (14), characterized in that the linear guide unit has a linear profile according to one of Claims 1 until 5 has that the runner carriers are designed as guide rails (7) which have a flat guide rail underside and are fastened with the guide rail underside to the top surfaces (5.1, 6.1) of the adaptive runner carrier receiving zones (5, 6). Linear unit, comprising a linear guide unit, a runner unit (13) and a linear drive unit (14), characterized in that the linear guide unit has a linear profile according to one of Claims 1 until 5 that the rotor carriers are designed as guide shafts (8), that the adaptive rotor carrier receiving zones (5, 6) have the V-receiving grooves (5.3, 6.3), which are provided subtractively from the solid bodies (5.2, 6.2) on the top surface side, and that the guide shafts (8) are fastened to the respective V-receiving groove (5.3, 6.3). Linear unit according to one of Claims 4 or 5 , characterized in that the linear drive unit (14) is designed as a linear motor. Linear unit according to one of Claims 4 or 5 , characterized in that the linear drive unit (14) is designed as a spindle drive. Linear unit according to one of Claims 4 or 5 , characterized in that the linear drive unit (14) is designed as a toothed belt drive.

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