Linear sliding bearing

Abstract

The invention relates to a linear sliding bearing (1) comprising a rail (2) and a carriage (3, 41) having a complementary linear guide (4) which interacts with the rail (2), the rail (2) being designed as a one-piece two-rail (5, 40) having two parallel rail elements (6, 7, 42, 43) in a rail plane (8), the linear guide (4) of the carriage (3, 41) has two parallel linear guide elements (9, 10) cooperating with the two tracks (5, 40), a first of the track elements (6, 42) and a first of the linear guide elements (9) forming a guide unit (11), by means of which a play-free or low-play sliding guide is provided, the second rail element (7) forms a support guide (12) with the second linear guide element (10).

Description

Technical Field

[0001] The invention relates to a linear sliding bearing, which comprises a longitudinally extending track and a carriage, wherein the carriage has a complementary linear guide that cooperates with the track, wherein the track is constructed as an integral double track with two parallel track elements, and the linear guide of the carriage has two parallel linear guide elements.

[0002] Such a linear sliding bearing can be used for a sliding guide of a working device. Depending on the field of application, the working device can have very diverse properties, for example it can be an element of a machine tool. Another embodiment is a working device in the form of a holding device for a display (which is mounted to be as easy to displace as possible). It is always important that the linear sliding bearing enables the lowest possible friction and wear linear guidance of the working device fastened thereto along its track, wherein at the same time the working device should be reliably held on the track. The invention relates, for example, to a linear sliding bearing which can be used in vehicle construction, in particular in commercial vehicles, such as tractors or cleaning vehicles. In the case of such commercial vehicles, it is usually desired that the working device be fastened in a simple manner in the longitudinal direction in the driver's cabin. In order to ensure a simple and reliable assembly of the working device, the linear sliding bearing is usually mounted firmly in the vehicle for this purpose. For this purpose, the track of the linear sliding bearing is fastened to the vehicle component, while the working device can be fastened to the carriage in a releasable manner. For this purpose, corresponding fastening devices are provided on the carriage and / or the working device. Background Art

[0003] In the case of linear plain bearings designed as double tracks with a matching carriage having parallel linear guide elements, the spacing of the parallel track elements is always subject to certain manufacturing tolerances and the shape retention of the track elements has certain shape tolerances. The same applies to the spacing of the parallel linear guide elements that must cooperate with the track elements and to the shape tolerances of the linear guide elements.

[0004] A person skilled in the art is aware of this type of linear sliding bearing that is constructed as an integrated double track from DE 20 2021 105 329 U1. The known linear sliding bearing has an operating arm on one of the two linear guide elements, which is arranged transversely to the longitudinal extension of the track and can be displaced in this transverse direction. The operating arm can be fixed and disassembled in the transverse direction. For fixing, a spring element can be provided, which acts together with the operating arm and pre-tightens the operating arm against one of the track elements in the transverse direction. In this prior art, the clearance-free or low clearance of the sliding guide is adjusted in this way. The clearance-free or low clearance of the sliding guide that can be achieved in this way is considered to be too complicated in terms of structure.

[0005] A general prior art is known from DE 20 2004 016 094 U1, which comprises a linear plain bearing with a double track, which is not integrally formed but consists of a single track. For this purpose, the single track must be screwed to a so-called base. In this prior art, the clearance-free or low-clearance assembly of the sliding guide of the linear plain bearing is accompanied by the screwing of the single track on the base. During the screwing, the parallel spacing of the single tracks relative to each other can be adapted to the parallel spacing of the linear guide elements, or parallelism errors or alignment errors of the tracks that may arise due to assembly and / or operation can be compensated by means of a screw connection. This type of adjustment to clearance-free or low-clearance is considered to be structurally complex, and the assembly costs are also excessive. Summary of the invention

[0006] The object of the present invention is to provide a structurally simplified linear plain bearing which provides the required zero play or low play and requires the least possible assembly effort.

[0007] According to the invention, this object is achieved in that a first of the rail elements and a first of the linear guide elements form a guide unit, by means of which a play-free or low-play sliding guide is provided, and the second rail element and the second linear guide element form a supporting guide.

[0008] This solution provides that only one track element of the double track and only one linear guide element of the carriage must cooperate as a guide unit to provide lateral guidance for the linear sliding bearing. The support guide formed by the second track element and the second linear guide element is essentially able to receive loads in a direction extending orthogonally to the track plane. The support guide does not have to fulfill a lateral sliding guide function.

[0009] In the prior art, the integrally manufactured double track has high requirements for the dimensional accuracy of the spacing dimension between the two parallel track elements of the double track, that is, the track gauge of the double track. In addition, the parallelism of the track elements of the double track is very high. The configuration according to the present invention can advantageously allow a certain dimensional inaccuracy or a larger tolerance in the track gauge of the double track. The parallelism requirements of the two track elements are also low. Only one of the two track elements forms a guide unit together with the assigned linear guide element, which alone is responsible for the accurate direction guidance of the movement of the carriage on the double track. On the other hand, the support unit is provided to compensate for any dimensional deviation in the track gauge of the double track and / or any deviation from the ideal parallelism to a certain extent. As a result, the structure allows for rougher dimensional and shape tolerances, or larger dimensional and shape tolerance areas, during the manufacture of the double track. This significantly reduces the cost and cost of manufacturing the double track. In addition, the structure according to the present invention improves the interchangeability of the double track with different carriages. Although according to the prior art the track gauge of the double track must be well matched to the track gauge of the carriage, i.e. both must be within a narrow tolerance zone, this tolerance zone can now be significantly increased. In mass production, this results in the double track being matched to a greater number of carriages whose track gauges are within a larger tolerance zone.

[0010] At least one track element of the double track advantageously has a cross-section with an outer contour and at least one linear guide element of the carriage has a cross-section with a complementary inner contour, and / or at least one track element of the double track has a cross-section with an inner contour and at least one linear guide element of the carriage has a cross-section with a matching outer contour.

[0011] The linear guide of the carriage is easily arranged so that it slides on the track elements of the double track by means of its two linear guide elements. Practically, different materials are selected for the track elements on the one hand and for the linear guide elements on the other hand, which different materials produce a suitable material pairing, in particular so that the material of one element has a significantly lower coefficient of friction than the material of the other element. Advantageously, the material of the linear guide element is a material with a lower coefficient of friction than the material of the track element forming the sliding surface. This has the advantage that the track can be selected from a material with good strength values, in particular a material with high bending strength and a resistant surface, such as a metal, preferably aluminum or an aluminum alloy. For example, a plastic can be selected as the material for the linear guide element which has a desired relatively low coefficient of friction compared to the material of the track.

[0012] The lateral play is practically provided between the linear guide element as part of the support guide and the associated rail element. With the built-in play, the support unit is easily configured to compensate for any dimensional deviations in the track gauge of the double track and / or any deviations from the ideal parallelism.

[0013] It is useful if the linear guide element assigned to the supporting guide has an inner contour and the cross section of the inner contour is further configured as a cross section of an outer contour of the assigned rail element.

[0014] It is usually practical to provide only the track elements of the double track with an outer contour and the linear guide elements of the carriage with an inner contour, as mentioned previously. This is the case, for example, when the double track is arranged at the bottom and the carriage is arranged at the top. It is practical here, for example, that the inner contour has a lateral opening, since the opening can be arranged facing downwards here. Thus, dirt cannot fall in and accumulate. An inverted configuration can be advantageous for a double track to be used suspended, so that the track elements of the double track are provided with an inner contour and the linear guide elements of the carriage are provided with an outer contour.

[0015] The rail element of the double rail provided with the outer profile practically forms the rail head.

[0016] The rail head preferably has a polygonal cross section, preferably a circular cross section with a cylindrical outer contour.

[0017] If the rail element belonging to the guide unit has an outer contour with a polygonal or circular cross section, the linear guide element can be centered on the rail element and thus the carriage as a whole can be accurately centered and guided using a matching linear guide element. This is successful because the polygonal cross section and the circular cross section each have lateral sliding surface areas that are arranged symmetrically with respect to one another. The linear guide element that is slidingly guided thereon is automatically centered thereon.

[0018] The rail head is easily supported by the tabs of the rail element.

[0019] The tab is practically arranged on the main element of the double track.

[0020] The rail element is configured as a one-piece rail or an one-piece double rail, and the tabs and the rail head are preferably also integrated in one piece. The tabs and the rail head are preferably arranged symmetrically to each other on the double rail.

[0021] The one-piece rail is practically manufactured by a prototype or remodeling process that does not require mechanical post-processing. The rail made of metal, in particular aluminum or an aluminum alloy, can be manufactured as an extruded rail profile. The double rail manufactured in this way has two rail elements, which are preferably symmetrically configured. On the other hand, the carriage is provided with a linear guide having two differently configured linear guide elements, namely a first linear guide element, with which a guide unit can always be produced, and a second linear guide element, with which a support guide can always be produced.

[0022] Since the track element is symmetrical, the first linear guide element can be combined selectively with one or the other of the two track elements. A guide unit is always produced. The linear guide element can also be combined selectively with one or the other of the two track elements and a supporting guide is always produced.

[0023] The linear guide element provided with the inner contour advantageously has a C-shaped cross section with a lateral opening. The lateral opening is practically dimensioned such that the inner contour of the linear guide element surrounds the track element over a circumferential range of from 180° to 320°.

[0024] Advantageously, the webs of the double track fit through lateral openings of the C-shaped cross section of the linear guide element.

[0025] In a preferred embodiment, the respective linear guide element belonging to the guide unit has an inner contour with a circular cross section. In the sense of the invention, the cross section is simplified to a circular cross section, but the cross section has a lateral opening.

[0026] Particularly preferably, the inner contour of the respective linear guide element belonging to the support guide is provided with an oval cross section. Said oval cross section is practically provided with a lateral opening.

[0027] In another improved embodiment, the elliptical cross section of the inner contour of the linear guide element consists of two partial arcs and a straight line. In the sense of the present invention, although the cross section is configured as an open cross section with only straight lines 29, it is simplified to be described as "elliptical".

[0028] The size of the gap provided in the support guide is preferably in the range of 0.05 mm to 1.00 mm, in particular 0.2 mm to 0.6 mm.

[0029] In an embodiment in which the elliptical cross section of the inner contour of the linear guide element consists of two semicircular arcs and two parallel straight lines of equal length, the gap is very simply defined by the length of the straight lines of the ellipse, which preferably must be within the size range mentioned for the gap.

[0030] A sliding bearing element is arranged between at least one of the rail elements and one of the linear guide elements. In this case, it is possible to dispense with the need to construct the linear guide element from a material having a low coefficient of friction. It is sufficient for the sliding bearing element to be constructed from a material having a low coefficient of friction to provide low-friction contact with the rail element and smooth sliding along the rail element. For this purpose, the sliding bearing element is preferably manufactured from a sliding bearing material, particularly preferably from a sliding bearing plastic.

[0031] In the sense of the present invention, a "sliding bearing plastic" is understood to be a preferably polymeric plastic which has a lower coefficient of friction than the surface of the rail element used as a sliding surface. This includes, in particular, the thermoplastics polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride, polytetrafluoroethylene as well as the thermosetting plastic phenolic resin. To further reduce friction, these plastics can contain lubricants, in particular fine-particle solid lubricants such as molybdenum disulfide or graphite. Such polymers are also referred to as tribopolymers, for example the products With the friction, wear and abrasion are reduced. Therefore, these products are desirable, in particular when high purity is important. This is the case, for example, in the food industry and the semiconductor industry as well as in biochemical and microbiological applications. As mentioned, these polymer materials can also contain fillers and fiber materials, such as those made of plastic or fabric, which improve the mechanical properties.

[0032] The plain bearing element advantageously has a sleeve-shaped plain bearing body with an inner contour, an outer contour, a central axis and a lateral opening.

[0033] The inner contour is preferably polygonal and particularly preferably hollow cylindrical. The outer contour can also be polygonal, preferably cylindrical.

[0034] Advantageously, the corresponding sliding bearing element arranged on a side surface of the guide unit and the corresponding sliding bearing element arranged on a side surface of the support guide each bear against a cross section of the associated rail element.

[0035] Furthermore, it can be provided that the plain bearing element on one side of the guide unit also bears with its outer contour against the cross section of the linear guide element.

[0036] The linear guide element here indirectly (i.e. with the interposition of a sliding bearing element) embraces / encloses the track element. The sliding bearing element itself embraces the track element and is in direct sliding contact with the track element. The linear guide element also embraces the track element, but is not in direct contact with it. The extent to which the track element is embraced by the sliding bearing element practically extends over a circumferential range of 200° to 320°. The circumferential range encompassed by the linear guide element and the circumferential range encompassed by the sliding bearing element are preferably identical or nearly identical.

[0037] Practically, on one side of the support guide, the inner contour of the linear guide element has a width that is greater than the width of the outer contour of the sliding bearing element, so that a lateral gap is formed relative to the sliding bearing element. If the inner contour of the linear guide element has an elliptical cross section and the outer contour of the sliding bearing element is cylindrical, a lateral crescent-shaped gap is formed between the outer contour of the sliding bearing element and the wide inner contour of the linear guide element. Some parts of the outer contour of the sliding bearing element serve as the fixing side here, so that the sliding bearing element partially contacts the inner contour of the linear guide element and fixes it, while other partial areas of the outer contour of the sliding bearing element accordingly define one side of the crescent-shaped gap. The crescent-shaped gap is therefore arranged on the outer side / outer contour of the sliding bearing element, which outer side / outer contour is only used for fixing in the linear guide element. As a result, the crescent-shaped gap is arranged away from the inner contour of the sliding bearing element that serves as a sliding bearing surface.

[0038] Advantageously, at least one of the linear guide elements has two guide sections arranged in a row, wherein the guide sections lie on the guide axis, and at least one of the linear guide elements has two support sections arranged in a row, wherein the support sections lie on the support axis.

[0039] For accurate and reliable linear support by means of linear sliding bearings, it is beneficial that each of the two guide sections has a certain length and a certain spacing is provided between the two guide sections. Thus, an overall advantageous length of the guide section can be provided. Otherwise, the torque acting on the carriage will cause the carriage to get stuck due to the tilting of the carriage on the track. The tilting caused by the guide section being too short will be advantageous. The practical length of the guide section is in particular in the range of 0.1 to 1.5 times, in particular in the range of 0.2 to 1.0 times, of the track gauge of the double track. The practical spacing between the guide sections arranged in a row is in particular in the range of 0.05 to 1.0 times, in particular in the range of 0.1 to 0.7 times, in particular in the range of 0.1 to 0.5 times, of the track gauge of the double track.

[0040] It is further advantageous if at least one of the guide sections of the first linear guide element and at least one of the support sections of the second linear guide element is provided with a sliding bearing element which can have a length which is within the practical length range of the guide section or support section, respectively, in a simple manner.

[0041] In a simple manner, all linear guide elements are provided with two guide sections which are arranged one behind the other in a row and each guide section is provided with a sliding bearing element in a practical manner. The sliding bearing elements arranged in a row have a spacing from one another which is within the same range as the practical spacing provided for the guide sections.

[0042] It is also practical to provide the sliding bearing element with a connection by means of which it can be connected to a linear guide element which is fixed in position relative to the guide axis. The sliding bearing element is to move with the carriage and is therefore connected to a corresponding linear guide element of the carriage in a fixed position.

[0043] In a simple manner, an adhesive or a form-fitting connection can be provided as the connecting element.

[0044] As part of the form-locking connection, locking recesses can be provided in the inner contour of the linear guide element.

[0045] Practically, the plain bearing element is provided with a projection on its outer contour as a complementary part of the form-locking connection, which projection is designed to cooperate with the locking recess of the linear guide element.

[0046] Furthermore, the inner contour of the sliding bearing element is provided with pocket-shaped or groove-shaped recesses, which extend parallel to its central axis or spirally around the central axis. The pockets or recesses can be used as dust or dirt chambers. The groove-shaped recesses can serve as dirt channels, through which dirt can also be discharged at the end-side ends of the sliding bearing element. The linear sliding bearing configured in this way provides safe operation against dirt. In addition, even at high speeds of the carriage relative to the rail, only minimal running noise occurs during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The invention is illustrated below by way of example in the accompanying drawings and described in detail with reference to a number of drawings. It shows:

[0048] Figure 1 Front view of a linear sliding bearing according to the present invention,

[0049] Figure 2 according to Figure 1 Front view of the linear sliding bearing carriage,

[0050] Figure 3 according to Figure 2 A zoomed-in detail of III,

[0051] Figure 4 according to Figure 2 A top view of the carriage,

[0052] Figure 5 according to Figure 1 Perspective view of a linear sliding bearing,

[0053] Figure 6 A front view of an alternative embodiment of a linear sliding bearing according to the invention,

[0054] Figure 7according to Figure 6 Front view of the linear sliding bearing carriage,

[0055] Figure 8 Front view of a plain bearing element,

[0056] Fig. 9 according to Figure 8 View of IX in. DETAILED DESCRIPTION

[0057] According to the attached figure, according to Figure 1 The linear sliding bearing 1 according to the invention comprises a track 2 and a carriage 3, which has a complementary linear guide 4 cooperating with the track 2. The track 2 is configured as an integral double track 5, which has two parallel track elements, namely a first track element 6 and a second track element 7, which are both arranged in a common track plane 8. The linear guide 4 of the carriage 3 has two parallel linear guide elements, namely a first linear guide element 9 and a second linear guide element 10, which are both arranged to cooperate with the track elements 6 and 7 of the double track 5.

[0058] The first rail element 6 of the double rail 5 forms together with the first linear guide element 9 of the carriage 3 a guide unit 11. A play-free or low-play sliding guide function is provided by means of this guide unit 11. The second rail element 7 forms together with the second linear guide element 10 a supporting guide 12. The supporting guide 12 essentially enables the reception of loads in a load direction L extending orthogonally to the rail plane 8. The supporting guide does not necessarily have to realize a lateral sliding guide function. Figure 4 An enlarged detail view of the support guide is shown in FIG.

[0059] The rail elements 6 and 7 are each configured as a rail head 6a or 7a. The two rail heads have a circular cross section, which form a cylindrical outer contour 13 or 14 respectively. The rail head 6a is arranged on the main element 16 of the double rail 5 with a tab 15, and the rail head 7a is arranged on the main element 16 with a tab 17. The cylindrical outer contour 13 / 14 is used as a sliding surface for the carriage 2. In order not to manufacture the entire carriage from a sliding bearing plastic, sliding bearing elements 18 and 19 made of a sliding bearing plastic are provided. These sliding bearing elements are fixedly fixed to the linear guide elements 9 and 10 to the carriage 3.

[0060] The sliding bearing element 18 is configured as a sleeve with a circular or annular cross section. However, the annular cross section is not closed, but is configured as a C-shaped open cross section 20, thereby forming a lateral opening 21. The tab 15 of the double track 5 fits through the lateral opening 21. The two sliding bearing elements 18 and 19 are identical and can be interchanged with each other in principle.

[0061] The sliding bearing elements 18 and 19 are identical. However, the manner in which the sliding bearing element 19 is supported in the linear guide element 10 differs from the manner in which the sliding bearing element 18 is supported in the linear guide element 9. Figure 2 and Figure 3 To explain, Figure 2 and Figure 3 In each case only the carriage is shown, but not the double track.

[0062] according to Figure 2 , corresponding sliding bearing elements 18 and 19 are shown in the two linear guide elements 9 and 10 of the carriage. The linear guide element 9 has an inner contour 22 with a circular cross section 23 with a lateral opening. The sliding bearing element 18 is arranged concentrically with the inner contour 22 of the linear guide element 9. In addition, according to Figure 1 The sliding bearing element 18 is also arranged concentrically with the cylindrical outer contour 13 of the rail element 6 .

[0063] The linear guide element 9 indirectly (i.e. with the interposition of the plain bearing element 18) embraces the rail element 6. Viewed in cross section, both, the linear guide element 9 and the plain bearing element 18, embrace the rail element, i.e. over a circumferential range of approximately 290°. This results in a positive fit between the linear guide element 9 and the rail element 6. Due to the positive fit, the carriage cannot be removed from the rail either laterally or upwards. The carriage has only one degree of freedom for its movement, i.e. in the direction of the longitudinal extension of the rail guiding it.

[0064] When the sliding bearing element 18 is fixedly fixed to the linear guide element 9 in a positionally fixed manner in the translation direction of the carriage, the sliding bearing element is in sliding contact with the sliding surface of the linear guide element relative to the rail head 6a. In this way, a guide unit 11 is formed, which provides a sliding guide function with no clearance or low clearance. "No clearance" is understood in the sense of the present invention to mean an almost no clearance fit between the linear guide element and the rail element, or a fit between the linear guide element and the sliding surface of the rail element under a small elastic prestress. With the latter measure, no clearance can be guaranteed and the ease or difficulty of the translational movement of the carriage on the double rail can be adjusted. "Low clearance" is understood to be a sliding guide function that is equipped with a guide clearance between the linear guide element and the sliding surface of the rail element, which is a sufficiently small guide clearance that prevents jamming due to the tilting of the carriage on the rail when there is a torque on the carriage.

[0065] Unlike the linear guide element 9, Figure 2 , the linear guide element 10 is provided with an inner contour 24 having an oval cross section 25 with lateral openings 26 . Figure 3The elliptical cross-section 25 with the lateral opening 26 can best be seen in the figure, which consists of two partial arcs 27 and 28 and a straight line 29. In this way, the support guide 12 is formed by means of the elliptical cross-section 25. The elliptical cross-section 25 has a width B as an inner contour of the linear guide element 10, which is greater than the outer diameter d of the sliding bearing element 19. In this way, the outer side surface / outer contour of the sliding bearing element 19 has a lateral gap 30 or 31 inside the linear guide element 10. The size of the lateral gap is dimensioned according to the length X of the straight line 29 of the elliptical cross-section 25. Due to this configuration, the gap 30 is constructed as an approximately crescent-shaped gap on the partial arc 27, and the gap 31 is constructed as an approximately crescent-shaped gap on the partial arc 28. In Figure 3 In the embodiment shown in FIG. 2 , the sliding bearing element 19 is centrally located in the oval cross section 25 . The crescent-shaped gaps each provide a lateral gap 30 / 31 of X / 2, which corresponds to half the length of the straight line 29 .

[0066] according to Figure 3 It can also be seen that the sliding bearing element 19 has a central axis 19a and is provided with groove-shaped recesses 32a, 32b, 32c, 32d arranged in the axial direction. The groove-shaped recesses can act as integrated dirt channels. Dirt particles can be removed from the rail into the dirt channels and guided out via the dirt channels.

[0067] The built-in clearance of the support guide is advantageously arranged away from the inner contour of the sliding bearing element. Thus, compared with the known embodiments in which the clearance is arranged in the region of the inner contour of the sliding bearing element, the inner contour of the sliding bearing element can better play its role as a sliding bearing surface.

[0068] Figure 4 3 shows a top view of a carriage 3. The linear guide element 9 of the carriage has two guide sections 33 and 34 arranged in a row. The guide sections are aligned along the guide axis F1. Each of the guide sections 33 and 34 is provided with a corresponding sliding bearing element 18 or 18' which is identical to each other and can be interchanged with each other.

[0069] The guide section 33 and the guide section 34 have a length K which corresponds substantially to the length of the plain bearing element 18. A distance M is provided between the two guide sections 33 and 34. The length K and the distance M are dimensioned such that a jamming due to tilting of the carriage 3 on the rail 2 is counteracted.

[0070] The linear guide element 10 has two support sections 35 and 36 arranged in a row. The support sections are also arranged in alignment. Each of the support sections 35 and 36 is provided with a corresponding sliding bearing element 19 or 19 ' which is identical and interchangeable with each other. In addition, they are identical and interchangeable with the sliding bearing elements 18 and 18 ' of the guide sections 33 and 34.

[0071] The sliding bearing element 18 / 18' is connected in a positionally fixed manner to the linear guide element 9, and the sliding bearing element is connected in a positionally fixed manner to the linear guide element 10. For this purpose, the linear guide element 9 is provided with locking recesses (A1, A2, A3, A4).

[0072] The upper side of the carriage 3 provides a mounting surface 37 for any mating working device (not shown). The mounting surface is provided with four holes 37a-d.

[0073] Figure 5 Show according to Figure 1 The double rail 5 has a length which corresponds approximately to twice the length of the carriage 3. In the region of the main element 16 of the double rail 5, a hole 38 is provided which can be used to mount the double rail.

[0074] Figure 6 1 shows a front view of an alternative embodiment of a linear sliding bearing 1 according to the invention, which has a track configured as a double track 40 and a matching carriage 41. Figure 1 The difference is that the profiles acting between the double track and the carriage are interchanged.

[0075] The double rail 40 is provided with rail elements 42 and 43 which each have an inner contour serving as a sliding surface, such as the hollow cylindrical inner contour 44 of the rail element 42 .

[0076] In conjunction with this, the carriage 41 is provided with linear guide elements 45 and 46. The linear guide elements each have an outer contour that matches the inner contour 44. In this embodiment, unlike the previous embodiments, the linear guide elements 45 and 46 of the carriage 41 are enclosed, that is, they are enclosed by the corresponding track element 42 or 43. Observed in cross section, the enclosed here also has a circumferential range of approximately 290°. The effect of this is that a form lock is produced between the linear guide elements 45 / 46 and the corresponding track elements 42 / 32. The form lock results in that the carriage 41 can neither be removed from the track laterally nor upwardly. The carriage has only one degree of freedom for its movement, namely in the direction of the longitudinal extension of the double track 40 that guides it.

[0077] The linear guide element 45 has a cylindrical outer contour 47. A sliding bearing element 48 with a central axis is arranged between the outer contour 47 and the inner sliding surface of the rail element 42. The sliding bearing element 48 moves together with the carriage 41 during operation. For this purpose, it is connected to the outer contour 47 of the linear guide element 45 in a fixed position. The sliding bearing element 48 itself has a cylindrical outer contour 49, which interacts with the inner sliding surface of the rail element 42 and slides thereon.

[0078] The cylindrical outer contour 49 is provided with four groove-shaped recesses 50a-d in the axial direction, which extend parallel to the central axis and are open to the outside. In the built-in state of the sliding bearing element 48, the groove-shaped recesses 50a-d can serve as a dirt channel. The track element 43 is arranged symmetrically with the track element 42, but has an inner contour 43a with an elliptical cross section 43b. The elliptical cross section is further configured as a hollow cylindrical inner contour 44 of another track element 42. Since the width of the inner contour 43a is large, it provides a gap S1 or S2 for the linear guide element 46 or the inserted sliding bearing element G respectively. The gap S1 / S2 is provided in the form of a crescent-shaped gap, which is provided between the outer contour of the sliding bearing element G and the elliptical inner contour 43a.

[0079] On the upper side, the carriage 41 is provided with a mounting surface 51 which can be used to accommodate a working device.

[0080] Figure 7 According to Figure 6 Front view of only the double track 40 of the linear sliding bearing of FIG. The inner contour 44 of the track element 42 and the inner contour 43a of the track element 43 can be seen, which form the track grooves respectively. The inner contour 44 has a circular cross section, wherein the circumferential edge is not completely closed, but has a lateral opening 52. The opening 52 is narrower than the diameter of the assigned linear guide element 45. Therefore, in the assembled state, there is the described form lock, which prevents the carriage 41 from accidentally detaching from the double track 40. The elliptical cross section 43b of the inner contour 43a also has a lateral opening 43c, which is narrower than the diameter of the assigned linear guide element 46 and also encloses the linear guide element in a form-locking manner.

[0081] Figure 8 A front view of another embodiment of a sliding bearing element 60 suitable for the first embodiment of the present invention is shown. Figures 1 to 3The sliding bearing element 60 shown here has an inner contour 61 which is simplified as a hollow cylinder and a central axis 64 and groove-shaped recesses 61a-f are arranged in the direction of this central axis. A lateral opening 65 with a width W is provided. Unlike the sliding bearing element of the first embodiment, only another number (six) of groove-shaped recesses are provided here. Their functions are the same. In the built-in state, the groove-shaped recesses 61a-f can serve as an integrated dirt channel. Dirt particles can be removed from the track into the dirt channel and guided out via the dirt channel.

[0082] On the outer contour 62, the sliding bearing element 60 has a plurality of projections 63a-g. The projections 63a-g serve to enable the sliding bearing element 60 to be arranged in a fixed position in the inner contour of the linear guide element, i.e. in a form-fitting manner. For this purpose, the linear guide element must be provided with a matching recess, for example an annular groove (not shown) in its inner contour.

[0083] Fig. 9 Shown along the Figure 8 IX. According to this illustration, the central axis 64 of the sliding bearing element 60 can be seen, as well as the length K of the sliding bearing element, the arrangement and size of the projections 63a-g arranged on the outer contour 62 of the sliding bearing element. In addition, the width W of the lateral opening 65 is shown.

[0084] Reference numerals list

[0085] 1 Linear sliding bearings

[0086] 2 tracks

[0087] 3 Slide

[0088] 4 Linear guide

[0089] 5 Dual Track

[0090] 6 First track element

[0091] 6a Track Header

[0092] 7 Second track element

[0093] 7a Track Header

[0094] 8 Orbital plane

[0095] 9 Linear guide elements

[0096] 10 Linear guide elements

[0097] 11. Guidance Unit

[0098] 12 Support guide

[0099] 13 cylindrical outer contour (first track element)

[0100] 14 cylindrical outer profile (second track element)

[0101] 15. Splice

[0102] 16 Main Components

[0103] 17 Splice

[0104] 18 Sliding bearing elements

[0105] 18' Sliding bearing element

[0106] 19 Sliding bearing elements

[0107] 19' Sliding bearing element

[0108] 19a Central axis

[0109] 20C section (sliding bearing 18)

[0110] 21 lateral opening (sliding bearing 18)

[0111] 22 Inner contour (first linear guide element)

[0112] 23 Circular cross section

[0113] 24 Inner contour (second linear guide element)

[0114] 25 Oval cross section

[0115] 26 Side opening

[0116] 27 Partial arc

[0117] 28 Partial arc

[0118] 29 Straight Line

[0119] 30 gap (crescent)

[0120] 31 gap (crescent)

[0121] 32a-d groove hollow

[0122] 33 Boot Segment

[0123] 34 Boot Segment

[0124] 35 Support section

[0125] 36 Support Section

[0126] 37 Mounting surface

[0127] 37a-d holes

[0128] 38 holes

[0129] 40 Double Track

[0130] 41 Slide

[0131] 42 Track elements

[0132] 43 Track elements

[0133] 43a Inner contour

[0134] 43b Oval cross section

[0135] 43c Side opening

[0136] 44 Inner contour

[0137] 45 Linear guide elements

[0138] 46 Linear guide elements

[0139] 47 Outer contour (linear guide element)

[0140] 48 Sliding bearing elements

[0141] 49 outer profile (sliding bearing element)

[0142] 50a-d groove hollow

[0143] 51 Assembly surface

[0144] 52 lateral opening (inner profile 44)

[0145] 60 Sliding bearing elements

[0146] 61 Hollow cylindrical inner profile

[0147] 61a-f groove hollow

[0148] 62 Outer contour

[0149] 63a-g protrusion

[0150] 64 Central axis

[0151] 65 Side opening

[0152] A1 Locking recess

[0153] A2 Locking recess

[0154] A3 Locking recess

[0155] A4 Locking recess

[0156] B Width

[0157] D outer diameter (sliding bearing element)

[0158] F1 Guide axis

[0159] G Sliding bearing elements

[0160] K length (sliding bearing element)

[0161] L Load direction

[0162] M spacing (between sliding bearing elements)

[0163] S1 Crescent gap

[0164] S2 Crescent gap

[0165] T2 Support axis

[0166] W Width

[0167] X length.

Claims

1. A linear sliding bearing (1) comprising a track (2) and a carriage (3, 41), the carriage having a complementary linear guide (4) cooperating with the track (2), wherein: The track (2) is constructed as an integrated double track (5, 40) having two parallel track elements (6, 7, 42, 43) in a track plane (8), and the linear guide (4) of the carriage (3, 41) has two parallel linear guide elements (9, 10) cooperating with the double track (5, 40), characterized in that a first track element (6, 42) of the track elements and a first linear guide element (9) of the linear guide elements form a guide unit (11), by means of which a clearance-free or low-clearance sliding guide is provided, and a second track element (7) and a second linear guide element (10) form a supporting guide (12).

2. The linear sliding bearing (1) according to claim 1, characterized in that At least one track element (6, 7) of the double track (5) has a cross-section with an outer contour (13, 14), and at least one linear guide element (9, 10) of the carriage (3) has a cross-section with a complementary inner contour (22, 24), and / or at least one track element (42, 43) of the double track (40) has a cross-section with an inner contour (43a, 44), and at least one linear guide element (45, 46) of the carriage (41) has a cross-section with a matching outer contour (49).

3. The linear sliding bearing (1) according to claim 1 or 2, characterized in that: A lateral gap (30, 31, S1, S2) is provided between a respective linear guide element (10, 46) as part of the support guide (12) and an associated rail element (7, 43).

4. The linear sliding bearing (1) according to claim 3, characterized in that The respective linear guide element (10) assigned to the support guide (12) has an inner contour (24), and the cross section of the inner contour (24) is further configured as the cross section of the outer contour (14) of the assigned rail element (7).

5. The linear sliding bearing (1) according to any one of claims 2 to 4, characterized in that The rail elements (6, 7) of the double rail (5) provided with an outer contour form rail heads (6a, 7a).

6. The linear sliding bearing (1) according to claim 5, characterized in that The rail head (6a, 7a) has a polygonal cross section, preferably a circular cross section, with a cylindrical outer contour (13, 14).

7. The linear sliding bearing (1) according to claim 5 or 6, characterized in that: The rail head (6a, 7a) is supported by a tab (15, 17) of the rail element (6, 7).

8. The linear sliding bearing (1) according to claim 7, characterized in that The webs (15, 17) are arranged on a main element (16) of the double track (5).

9. The linear sliding bearing (1) according to any one of claims 2 to 8, characterized in that The linear guide element (9, 10) provided with an inner profile has a C-shaped cross section (20) with a lateral opening (21).

10. The linear sliding bearing (1) according to claim 9, characterized in that The tabs (15, 17) of the double track (5) fit through the lateral openings (21) of the C-shaped cross-section (20) of the linear guide elements (9, 10).

11. The linear sliding bearing (1) according to any one of claims 2 to 10, characterized in that The respective linear guide element (9) belonging to the guide unit (11) has an inner contour (22) with a circular cross section (23).

12. The linear sliding bearing (1) according to claims 3 to 11, characterized in that The inner contour (22) of the respective linear guide element (10) belonging to the support guide (12) is provided with an elliptical cross section (25).

13. The linear sliding bearing (1) according to claim 12, characterized in that The elliptical cross section (25) of the inner contour (22) of the linear guide element (10) is composed of two partial arcs (27, 28) and a straight line (29).

14. The linear sliding bearing (1) according to any one of claims 3 to 13, characterized in that The gap (30, 31, S1, S2) provided in the support guide (12) is preferably between 0.05 mm and 1.00 mm, in particular between 0.2 mm and 0.6 mm.

15. The linear sliding bearing (1) according to any one of claims 1 to 14, characterized in that A sliding bearing element (18, 18', 19, 19', 48, 60) is arranged between at least one of the rail elements (6, 7, 42, 43) and one of the linear guide elements (9, 10, 45, 46).

16. The linear sliding bearing (1) according to claim 15, characterized in that The sliding bearing element (18, 18', 19, 19', 48, 60) has a sleeve-shaped sliding bearing body with an inner contour (61), an outer contour (62), a central axis (64) and a lateral opening (65).

17. The linear sliding bearing (1) according to claim 15 or 16, characterized in that The corresponding sliding bearing elements (18, 18', 48) arranged on the side of the guide unit (11) and the corresponding sliding bearing elements (19, 19') arranged on the side of the support guide (12) are both in close contact with the cross section of the associated rail element (6, 7, 42).

18. The linear sliding bearing (1) according to any one of claims 14 to 17, characterized in that The sliding bearing elements (18, 18', 48) on the side of the guide unit (12) also bear against the cross section of the linear guide elements (9, 45) with their outer contour (62).

19. The linear sliding bearing (1) according to any one of claims 14 to 18, characterized in that On the side of the support guide (12), the inner contour (24) of the linear guide element (10) has a width that is greater than the width or diameter of the outer contour (62) of the sliding bearing element (19, 19', 60), so that a lateral gap (30, 31, S1, S2) is formed relative to the sliding bearing element (19, 19', 60).

20. The linear sliding bearing (1) according to any one of claims 1 to 19, characterized in that At least one of the linear guide elements (9, 45) has two guide sections (33, 34) arranged in a row, and the guide sections (33, 34) are located on a guide axis (F1), and at least one of the linear guide elements (10, 46) has two support sections (35, 36) arranged in a row, and the support sections (35, 36) are located on a support axis (T2).

21. The linear sliding bearing (1) according to claim 20, characterized in that At least one of the guide sections (33, 34) of the first linear guide element (9) and at least one of the support sections (35, 36) of the second linear guide element (10) are provided with a sliding bearing element (18, 18', 19, 19', 48, 60, G).

22. The linear sliding bearing (1) according to any one of claims 14 to 21, characterized in that A connecting piece is provided for the sliding bearing element (18, 18', 19, 19', 48, 60, G), by means of which the sliding bearing element can be connected to the linear guide element (9, 10, 45, 46) in a fixed position relative to the guide axis (F1, T2).

23. The linear sliding bearing (1) according to claim 22, characterized in that An adhesive or a form-fitting connection is provided as the connecting element.

24. The linear sliding bearing (1) according to claim 23, characterized in that As part of the form-locking connection, locking recesses (A1, A2, A3, A4) are arranged in the inner contour (22, 24) of the linear guide element (9, 10).

25. The linear sliding bearing (1) according to claim 23 or 24, characterized in that The sliding bearing element (18, 18', 19, 19', 48, 60, G) is provided with a protrusion (63a, 63b, 63c, 63d, 63e, 63f, 63g) on ​​its outer contour (62) as a complementary part of the form-locking connection, and the protrusion is configured to cooperate with the locking recess (A1, A2, A3, A4) of the linear guide element (9, 10, 45, 46).

26. The linear sliding bearing (1) according to any one of claims 14 to 25, characterized in that The inner contour of the sliding bearing element (18, 18', 19, 19', 48, 60, G) is provided with a pocket-shaped recess or a groove-shaped recess (32a, 32b, 32c, 32d, 61a, 61b, 61c, 61d, 61e, 61f), and the pocket-shaped recess or the groove-shaped recess extends parallel to the center axis (64) or extends helically around the center axis (64).

Images