Telescopic guide

Abstract

The invention relates to a telescopic guide (1), comprising a first telescopic element (2), which extends lengthwise, as a base element (2a), and a second telescopic element (3), which extends lengthwise, as an end element (3a), which are arranged parallel to one another and can be moved relative to one another in the longitudinal direction, a sliding bearing is arranged indirectly or directly between the first telescopic element (2) and the second telescopic element (3), with the proviso that the sliding bearing has a first sliding bearing unit with at least one sliding bearing element (26, 27, 26 ', 27') which can be fixed on the first telescopic element (2) in a stationary manner and which is in sliding contact with the second telescopic element (3), the second sliding bearing unit has at least one sliding bearing element (37) which can be fixed on the second telescopic element (3) in a stationary manner and which is in sliding contact with the first telescopic element (2), the sliding bearing element (26, 27, 26 ', 27', 37) being configured as a sleeve-shaped sliding bearing body (51, 61) having a C-shaped cross-section (52, 62) by means of which a lateral opening (53, 63) is formed on the sliding bearing body (51, 61).

Description

Technical Field

[0001] The present invention relates to a telescopic guide, comprising a longitudinally extending first telescopic element as a base element, and a longitudinally extending second telescopic element as a terminal element, wherein the two telescopic elements are arranged parallel to each other and can be moved relative to each other in the longitudinal direction, wherein a sliding bearing is indirectly or directly arranged between the first telescopic element and the second telescopic element, provided that the sliding bearing has a first sliding bearing unit, which has at least one sliding bearing element that can be fixedly fixed on the first telescopic element and is in sliding contact with the second telescopic element, and the second sliding bearing unit has at least one sliding bearing element that can be fixedly fixed on the second telescopic element and is in sliding contact with the first telescopic element. Background Art

[0002] Such a telescopic guide is known from utility model DE 20 2018 104 466 U1. The telescopic guide has a telescopic element, which has two rails extending in parallel. Four sliding bearing elements are provided for the sliding support of the two telescopic elements, two of which are fixed to the first telescopic element and are in sliding contact with the second telescopic element, and two of which are fixed to the second telescopic element and are in sliding contact with the first telescopic element.

[0003] The known structure provides a plurality of so-called sliding guide surfaces to provide telescopic mobility of the telescopic elements relative to each other. Typical for this prior art is the configuration of sliding bearing elements, which are all structurally identical. That is, only a single type of sliding bearing element is commonly used. The common sliding bearing element is used both on the left and on the right side of the double track and must also be optionally fixable to the first telescopic element or the second telescopic element. For this purpose, suitable fixing means must be provided in duplicate, which are implemented in the form of two recesses that must act together with a separate clamping element. In the fixed state of the telescopic element, the clamping element used forms a convex configuration, which fits into one of the recesses of the sliding bearing element in a form-locking manner. The clamping element can be, for example, a screw that can be screwed onto the telescopic element.

[0004] Known telescopic guides are considered to protrude too much in space and are structurally complex. Conventional sliding elements are considered to be too complex. In addition, the use of clamping elements on telescopic elements is labor-intensive. In particular, when screws are used as clamping elements, these screws must be screwed onto the telescopic element parallel to the longitudinal extension. The labor expenditure is high in order to screw the required number of screws into the required positions on the respective telescopic element. Summary of the invention

[0005] The invention is based on the object of specifying a more compact telescopic guide which can be produced with less material expenditure, requires less installation space and can be assembled more easily.

[0006] According to the invention, this object is achieved in that the plain bearing element is designed as a sleeve-shaped plain bearing body with a C-shaped cross section and the lateral opening is formed on the plain bearing body by means of the C-shaped cross section.

[0007] The novel sleeve-shaped plain bearing body with a C-shaped cross section eliminates the complexity of the known plain bearing bodies. The space requirement for the plain bearing body is significantly smaller, with the result that the configuration of the telescopic element is also simplified, the telescopic element is constructed more compactly and requires less material overall. The proposed telescopic guide is easier to assemble and easier to handle.

[0008] The C-shaped cross section of the sleeve-shaped plain bearing body always produces a positive connection with and relative to the two telescopic elements in question.

[0009] The sliding bearing thus provided absorbs forces from all directions in the cross-sectional plane of the sliding bearing body.

[0010] Each sleeve-shaped plain bearing body practically has an inner contour and an outer contour, wherein the inner contour and the outer contour extend in the axial direction of the plain bearing body, wherein the inner contour and the outer contour are arranged concentrically with each other. This configuration is conducive to the compactness of the plain bearing body.

[0011] The inner contour of the sliding bearing body advantageously has a polygonal cross section and the cross section is preferably square. The polygonal configuration, in conjunction with the telescopic element involved, helps achieve the supporting and guiding functions.

[0012] It is also useful if the outer contour of the sliding bearing body has a polygonal or circular cross section. The polygonal configuration of the outer contour in conjunction with the telescopic element in question is very advantageous for achieving the supporting and guiding functions, while a circular cross section is advantageous without having to absorb torque.

[0013] The invention provides in particular two types of plain bearing elements with differently configured plain bearing bodies. Differentiated structures are provided instead of universal plain bearing elements. Each type of plain bearing element / plain bearing body has only those functional features required in operation.

[0014] The plain bearing body of the first type is advantageously designed such that its inner contour is provided as a plain bearing surface and its outer contour is formed with fastening means for fixed-position fastening to the telescopic element.

[0015] Furthermore, it is advantageous if the plain bearing body of the second type is designed in such a way that its outer contour is provided as a plain bearing surface and its inner contour is formed with fastening means for fixed-position fastening to the telescopic element.

[0016] The two types of plain bearing bodies differ in their construction in the arrangement of the plain bearing surfaces, which are arranged either on the inner contour or on the outer contour. Furthermore, the respective other contour (inner contour or outer contour) is used to fix the plain bearing body on one of the telescopic elements. A universal design of a single type of plain bearing element or plain bearing body is abandoned.

[0017] The telescopic element is expediently provided with complementary means which are provided for cooperating with the fastening means of the plain bearing body.

[0018] For example, it is helpful for assembly if the opening of the C-shaped cross section of the plain bearing body can be temporarily enlarged by means of elastic deformation of the plain bearing body.

[0019] Another use is that the first elongated telescopic element provided as a base element is provided with a support rail and the support rail has either a cross section with a raised rail head or a cross section with a rail groove.

[0020] It is also advantageous if the second elongated telescopic element provided as the end element is provided with a sliding rail, wherein the sliding rail complementary to the supporting rail of the first elongated telescopic element has either a cross section with a raised rail head or a cross section with a rail groove.

[0021] In principle, the supporting rails cooperate with the sliding rails in each case so that both can be moved in translation relative to each other. Advantageously, the supporting rail is stationary and supports the load, while the sliding rail moves on the supporting rail. For this purpose, the two complementary rails have a cross-section such as the mentioned raised rail head and rail groove. The rail head is preferably arranged on the supporting rail oriented upwards, and the rail groove is arranged on the sliding rail in such a way that the opening of the groove section is oriented downwards. It is practical if the rail head and the rail groove are not in direct contact but a sliding bearing is arranged between the two, which sliding bearing can be provided in the form of the two types of sliding bearing bodies described.

[0022] The scope of application can be improved if the cross section of the rail groove embraces / encloses the cross section of the associated rail head in a form-fitting manner so that the rail groove and the rail head cannot be separated laterally or upwards. The rail head and the rail groove can be separated by opposite displacement in the longitudinal direction.

[0023] In order to provide a positive-locking enclosure, the rail groove practically embraces the rail element over a circumferential range of 200° to 320°, preferably 270° to 300°, particularly preferably 280° to 290°. If a sliding bearing element is inserted, the circumferential range enclosed by the rail groove around the rail head and the circumferential range enclosed by the sliding bearing element around the rail head are identical or nearly identical.

[0024] Another advantage is that the cross-sectional configuration of the raised rail head is complementary to the inner contour of the sliding bearing body, and the cross-sectional configuration of the rail groove is complementary to the outer contour of the sliding bearing body. By this measure, the supporting rail and the sliding rail with their raised rail head or rail groove respectively serve as a support base for holding the sliding bearing body. The sliding bearing body is supported and guided in this way.

[0025] Another advantage is that a first type of sliding bearing body can be used on a telescopic element, which comprises a support rail with a raised rail head or a sliding rail with a raised rail head, and the outer contour of the first type of sliding bearing body is provided with fixing means for fixing it in a fixed position on the corresponding telescopic element.

[0026] It is also advantageous that a second type of sliding bearing body can be used on a telescopic element, which comprises a support rail with a rail groove or a sliding rail with a rail groove, and the inner contour of the second type of sliding bearing body is provided with fixing means for fixed position fixing on the corresponding telescopic element.

[0027] In the case of providing at least one third telescopic element extending longitudinally as an intermediate element, the application range of the proposed telescopic guide can be expanded. The intermediate element is considered to be a second telescopic element relative to the base element, which represents the first telescopic element. Conversely, the intermediate element can be referred to as a first telescopic element relative to the terminal element, which then serves as a base for the terminal element (as the second telescopic element).

[0028] Advantageously, the intermediate element comprises a sliding rail cooperating with a supporting rail of the base element, and the intermediate element itself comprises a supporting rail cooperating with a sliding rail of the end element.

[0029] An intermediate element further configured in this way can be connected to the base element in a form-locking sliding manner and to the terminal element in a form-locking sliding manner. In addition, two or more intermediate elements can be connected overlappingly so that they can cooperate in a form-locking sliding manner. In this way, the telescopic guide can be extended by a further telescopic element in the form of an intermediate element.

[0030] An additional improvement is achieved if the telescopic elements are each designed as a double track, wherein the double track has two parallel support tracks and / or two parallel sliding tracks.

[0031] For the intermediate element designed as a double track, it is practical to arrange two double tracks one above the other, wherein one double track is configured with parallel sliding tracks and faces the base element, and the other double track is configured with parallel supporting tracks and faces the terminal element.

[0032] Advantageously, in the case of a double track, a lateral guidance can be produced between one of the parallel tracks (support track or sliding track) and the associated sliding bearing body, while a lateral gap (air) is provided between the sliding bearing bodies of the other of the parallel tracks.

[0033] The base element is practically provided with a mounting base. The telescopic guide can thus be mounted lying down (horizontally). However, it can also be mounted upright (vertically). Drawer slides are a possible application.

[0034] Furthermore, the base element can have two side elements, wherein the side elements have a height which is sufficient to laterally enclose the telescopic element arranged thereon. Such side elements serve at least for mechanical protection and to prevent contamination.

[0035] It is also useful if at least one of the side elements is designed as a closed side wall. This improves the protection of the interior of the telescopic guide from contamination.

[0036] It is advantageous for the terminal element to have a mounting surface for any additional parts.

[0037] The mounting plane can usefully be a closed surface. The interior space of the telescopic guide can thereby be protected from contamination.

[0038] At least one of the telescopic elements is practically designed in one piece, preferably made of metal, particularly preferably made of aluminum or an aluminum alloy. Aluminum or an aluminum alloy can be produced by extrusion. Such dimensional and shape accuracy and the surface quality achievable thereby are sufficient for the telescopic element. In particular, the region of the extruded telescopic element that is required as a sliding surface also has sufficient dimensional and shape stability and a sufficient surface quality. The aluminum material advantageously has an anodized surface.

[0039] All telescopic elements of the telescopic guide preferably have a uniform total length. Between two telescopic elements, a projection length is provided which is a fraction of this total length. This projection length is preferably in the range of 30% to 70% of the total length of the telescopic element, preferably 50% of the total length.

[0040] The sleeve-shaped plain bearing body with its lateral opening is produced from a plastic, preferably in the form of a polymer sliding material, particularly preferably from such a sliding material with reinforcing fillers, such as fibers made of plastic or fabric.

[0041] In the context of the present invention, "sliding material" is understood to be a polymer material having a lower coefficient of friction than the surface of the telescopic element that serves as a sliding surface. In particular, it includes the thermoplastics polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride, polytetrafluoroethylene and, in the case of thermosetting plastics, phenolic resins. In order to further reduce friction, the plastic can contain lubricants, especially fine-particle solid lubricants, such as molybdenum disulfide or graphite. Such polymers are also called friction polymers. With this friction, wear is reduced and abrasion becomes less. Therefore, this product is desirable, especially 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, the polymer material can also contain fillers and fiber materials, such as fillers and fiber materials made of plastic or fabric, which improve the mechanical properties.

[0042] Especially when using a combination of plastic and aluminum materials, the proposed telescopic guide can be made very robust.

[0043] Telescopic elements are more often subjected to bending during use. Therefore, they are produced from a material with high bending stiffness, preferably from a metal such as the mentioned aluminum material.

[0044] In an upright mounted drawer slide application, laboratory tests have shown that two adjacent telescopic guides with a projection length of 400 mm can withstand a static load of up to 180 N.

[0045] By using aluminum materials, the telescopic guide benefits from an even further reduced overall weight. In addition, the telescopic guide has very good corrosion resistance. The sliding bearing of the telescopic guide does not require lubricants. Due to the omission of lubricants, dirt cannot adhere to the components of the telescopic guide, which is beneficial to operational reliability. Any dirt that is present can be removed with a high-pressure cleaner and / or using a cleaning agent. As a result, the telescopic guide has low maintenance costs and is inexpensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention is exemplarily shown in the drawings below and is described in detail with reference to the drawings. Here, it is shown:

[0047] Figure 1 Front view of a first embodiment of a telescopic guide according to the invention with two telescopic elements,

[0048] Figure 2a The basis for being in a state of retraction Figure 1A schematic side view of a telescopic guide,

[0049] Figure 2b In partially extended state Figure 1 A schematic side view of a telescopic guide,

[0050] Figure 2c In the maximum extended state Figure 1 A schematic side view of a telescopic guide, Figure 3 Front view of a second embodiment of a telescopic guide according to the invention with three telescopic elements,

[0051] Figure 4 A perspective view of the rear side of the second embodiment without the upper telescopic element,

[0052] Figure 5 A perspective view of a plain bearing element with a sleeve-shaped plain bearing body having an inner plain bearing surface and an outer form-locking fixing means,

[0053] Figure 6 A perspective detail of a telescopic element with complementary means, which are provided for Figure 5 External fixing means for plain bearing elements,

[0054] Figure 7 A perspective view of a plain bearing element with a sleeve-shaped plain bearing body having an outer plain bearing surface and an inner form-locking fixing means,

[0055] Figure 8 A perspective sectional view of a telescopic element with complementary means arranged to Figure 7 Internal fixing device of the sliding bearing element,

[0056] Fig. 9 according to Figure 3 A detailed view of the IX in

[0057] Fig.10 according to Fig. 9 A detailed view of X in

[0058] Fig.11 according to Figure 3 A detailed view of XI in

[0059] Fig.12 according to Fig.11 A detailed view of XII in

[0060] Fig.13 According to a third embodiment of the telescopic guide with two telescopic elements of the invention,

[0061] Fig.14 A fourth embodiment of a telescopic guide according to the invention having three telescopic elements. DETAILED DESCRIPTION

[0062] Figure 1 A first embodiment of a telescopic guide 1 according to the invention is shown, namely a view from the front. According to this, the telescopic guide 1 comprises two longitudinally extending telescopic elements 2 and 3, namely a base element 2a arranged below and a terminal element 3a arranged above the base element, which forms a longitudinally extending second telescopic element 3. The two telescopic elements are arranged parallel to each other and can be moved relative to each other in the longitudinal direction. The longitudinal direction extends orthogonally to the plane of the front view.

[0063] The telescopic elements 2 and 3 of this embodiment are respectively configured as double rails 4 or 5. The base element 2 is symmetrically configured. The base element is provided with a mounting base 6, which has symmetrical base plates 7 and 8, side walls 9 and 10 and upper side bars 11 and 12. The base plate is used to mount or assemble the telescopic guide 1 on a surface. In addition, the base element 2a has two support rails 13 and 14, which are oriented upward relative to the mounting base 6. The support rails 13, 14 cooperate with the sliding rails 15 and 16 of the terminal element 3a. For this purpose, the support rails are respectively provided with a quadrilateral cross section, which forms a raised rail head 15 or 16. The support rail 13 is connected to the side wall 9 of the base element 2a by means of a retaining tab 19. The retaining tab 19 has a lower cross member 20, on which a retaining member 21 is arranged extending upward. The retaining member 21 is provided with an inclined retaining arm 22, on which a quadrilateral cross section of a rail head 17 is configured. In addition, the retaining tab 19 has a central part 23, which is arranged parallel to the side wall 9 of the base element 2a and has an upper connecting tab 24 at the upper end, which extends to the side wall 9 of the base element 2a. The upper connecting tab 24 touches the side wall 9 orthogonally and is placed slightly above the quadrilateral cross section of the rail head 17. The retaining tab 19 is designed integrally with the support rail 13 and the base element 2a. The support rail 14 on the other side is also designed integrally with the base element 2a by means of a symmetrically designed retaining tab 25.

[0064] The sliding bearing element 26 is arranged on the rail head 17 and the sliding bearing element 27 is arranged on the other rail head 18. Each of the sliding bearing elements 26 / 27 itself has a quadrilateral inner contour and has a circular outer contour. The sliding bearing elements 26 / 27 are identical. However, in principle two different types of sliding bearing elements are provided, which will be referred to below. Figure 5 and Figure 7 Described in further detail.

[0065] Additional references Figure 1 It can be seen that the two sliding rails 15 and 16 of the terminal element 3 a are designed as rail grooves 28 and 29 .

[0066] The rail head 18 of the support rail 14 is designed to be slightly narrower than the rail head 17 of the support rail 13. As a result, the rail head 18 maintains a certain lateral clearance S1 (air). Therefore, the rail head 17 of the support rail 13 together with the associated sliding bearing element 26 assumes lateral guidance, while the rail head 18 of the support rail 14 can compensate to a certain extent for any dimensional deviations of the track gauge of the double track and / or any deviations from the ideal parallelism of the support rails. In the case of horizontal use of the proposed telescopic guide, the rail head 18 together with the support rail 14 can support a part of the applied load without providing lateral guidance.

[0067] The terminal element 3a is provided with a mounting plane 30 at the top, for example a flat mounting surface 30a. The mounting surface 30a is constructed on a tab 31 connecting the two sliding rails 15 / 16. The cross section of the tab 31 has a certain material thickness and is symmetrically configured. The tab 31 has a maximum material thickness in the middle. It is preferably provided that the material thickness decreases toward both sides. The reduction in material thickness is particularly preferably performed symmetrically in the step 32 or 33.

[0068] The base element 2a is also provided with a tab 34. This tab 34 connects the two support rails 13 / 14. This tab 34 also has a cross section in which the material thickness is greatest in the middle. Preferably, it is provided that the material thickness decreases towards both sides. The reduction in material thickness is particularly preferably also carried out in the step 35 or 36.

[0069] Figure 2a to Figure 2c Show respectively according to Figure 1 Schematic side view of a telescopic guide 1 implemented as a double track. Figure 2a The telescopic guide is shown in a retracted state, and Figure 2b in a partially extended state, and according to Figure 2c In the maximum extended position.

[0070] Figure 2a The two telescopic elements 2 and 3 are shown in the retracted state. That is, the shortest possible total length L of the telescopic guide 1 min. The lower telescopic element 2 is the base element 2a, while the upper telescopic element 3 is the terminal element 3a. Two sliding bearing elements 26 and 37 are shown in their longitudinal extension, which are assigned to one track side of the double track, that is, the telescopic guide has a total of four sliding bearing elements. The fixing device 26a is shown symbolically, with which the sliding bearing element 26 is fixed to the telescopic element 3. In contrast, the sliding bearing element 37 is fixed to the telescopic element 2 (base element 2a) by means of a fixing device 37a. In this way, the sliding bearing element 26 can move together with the upper telescopic element 3 (i.e. the terminal element 3a).

[0071] Furthermore, the end element 3 a is provided with stop means 38 which interact with a stop 39 arranged on the base element 2 a .

[0072] according to Figure 2b , the upper telescopic element 3 has partially extended by a distance D. The sliding bearing element 26 fixed thereto has moved together with it by the same distance, and the stop means 38 has shortened the distance to the stop 39 .

[0073] exist Figure 2c In the embodiment, the telescopic guide 1 or the telescopic element 3 extends to a maximum extension length D max The stop means 38 has come into contact with the stop 39 and in this way limits the extension length to the maximum value. Without this limitation, the extension length could reach further, until the sliding bearing elements 26 and 37 collide with each other. In principle, this is possible, but is preferably avoided for stability reasons. For safety reasons, a certain bending strength of the entire telescopic guide 1 is ensured by means of the proposed limitation. In the embodiment shown, the maximum extension length D max Corresponds to Figure 2a The shortest possible overall length L of the telescopic guide 1 shown in min About 50%.

[0074] Figure 3 1 shows a front view of a second embodiment of a telescopic guide according to the invention. The second embodiment comprises three telescopic elements. The upper telescopic element 3 is arranged as a terminal element 3a. Figure 1 The lower telescopic element 2 provided as the base element 2a has a relatively Figure 1 Higher side walls 9' and 10' and Figure 1 Greater total height H. But the rest of the Figure 1 For the upper telescopic element 2 and the lower telescopic element 3, Figure 3 In the example, equivalent features are used with Figure 1The third additional telescopic element 40 is designed as an intermediate element 40a. It cooperates with the base element 2a located below and the terminal element 3a located above in a sliding manner. The three telescopic elements are all designed as double rails. In order to enable the intermediate element 40a to cooperate with the adjacent telescopic elements 2 and 3 above and below, the intermediate element itself is provided with two overlapping double rails 41 and 42. The lower double rail 42 of the intermediate element has parallel sliding rails 43 and 44 that cooperate with the support rail of the base element 2a, while the upper double rail 41 is provided with parallel support rails 45 and 46 that cooperate with the sliding rails 15 and 16 of the base element 3a. A sliding bearing element 26 is provided on the rail head 17 of the support rail 13, and a sliding bearing element 26' of the same type is provided on the rail head of the support rail 45 of the intermediate element 40a. Sliding bearing elements 27 and 27' are provided on the other symmetrical side of the intermediate element 40a.

[0075] The intermediate element 40a is provided with a symmetrically designed web 47. The web 47 is arranged at the top so that its upper side 48 extends beyond the support rails 45 / 46 of the intermediate element 40a. The web connects two symmetrical side areas 49 and 50 of the intermediate element 40a. The side area 49 comprises a sliding rail 43 and a support rail 45 arranged on the sliding rail. The sliding rail 44 and the support rail 46 above it are arranged in the side area 50. The support rails 45 / 46 belong to the upper double rail 41 of the intermediate element 40a and are configured as raised rail heads, the configuration of which is similar to that of the referenced Figure 1 The sliding rails 43 and 44 belong to the lower double rail 42 of the intermediate element 40a, and they are configured as rail grooves, the configuration of which matches the configuration of the rail grooves 15 / 16 of the terminal element 3a, which is connected to the intermediate element 40a. Figure 1 The aforementioned web 47 of the intermediate element 40a has three regions 47a with a constant material thickness. Two regions 47b with a greater material thickness 47b are arranged between the three regions.

[0076] Figure 4 Show Figure 3, in which, however, only two of the telescopic elements of the telescopic element of the second embodiment are shown, namely the base element 2a and the intermediate element 40a. The terminal elements are omitted in this illustration. In the perspective view, the intermediate element 40a is drawn in an extended position relative to the base element 2a. Since the rear side is shown here, the support rail 14 with the narrower rail head 18 is located on the left side in the illustration. A gap S1 is generated on this side of the double rail. For the rest, the sliding bearing element 27 is fixed in the sliding rail 44 and moves with the sliding rail in a sliding manner when the intermediate element 40a is retracted or extended.

[0077] References below Figure 5 and Figure 7 The details of the two different types of sliding bearing elements mentioned above are described in detail. Figure 5 Show Figure 4 A plain bearing element 26 of the type which can be seen in FIG.

[0078] The sliding bearing element 26 is included in Figures 1 to 3 In. According to Figure 5 , the sliding bearing element is configured as a sleeve-shaped sliding bearing body 51 of the first type and has a C-shaped cross section 52. An opening 53 is configured laterally in the sliding bearing body 51. In addition, an inner contour 54 is provided, which extends in the axial direction M of the sliding bearing body 51. Likewise, an outer contour 55 extends in the direction of the center axis M. The inner contour 54 and the outer contour 55 are arranged concentrically with each other and with the center axis M, so that a compact configuration of the sliding bearing element 26 is achieved.

[0079] The inner contour 54 of the plain bearing body 51 has a square cross section 56, which results in four inner bearing surfaces 56a, 56b, 56c and 56d. Grooved recesses 57a, 57b, 57c are provided at the corners of the adjacent inner bearing surfaces. The inner contour 54 is interrupted by the lateral opening 53 of the plain bearing body 51, wherein, despite the interruption, the cross section of the inner contour 54 is simplified to be square within the meaning of the present invention. The concentrically arranged outer contour 55 has a circular cross section 58, which is also interrupted and, despite this, the cross section is simplified to be circular, or the outer contour 55 is referred to as cylindrical.

[0080] exist Figure 5 In the sliding bearing element 26 of FIG. 5 , the inner contour 54 serves as a sliding bearing surface, or the four inner bearing surfaces 56 a , 56 b , 56 c and 56 d serve for sliding bearing.

[0081] The outer contour 55 is provided with fixing means which, in the assembled state, interact with the telescopic element in a form-fitting manner. Figure 5, the fixing means comprises ribs 59a, 59b and 59c which protrude from the cylindrical outer contour 55 in radial direction.

[0082] Figure 6 The third telescopic element 40 (intermediate element 40a) is partially shown with a perspective view of the arrangement of Figure 5 The position of the complementary means with which the fixing means of the sliding bearing element 26 cooperates can be seen. The sliding track 43 which is constructed as a track groove 28 with a C-shaped cross section can be seen.

[0083] The complementary means comprises a groove-like recess 60 in the track groove 28. The recess 60 is configured to cooperate with Figure 5 In this way, when the telescopic element 40 moves in translation, the telescopic element can move the form-locking sliding bearing element 26 with it, such as Figure 4 Visible in.

[0084] Figure 7 A second type of sliding bearing element 37 is shown. The sliding bearing element 37 comprises Figure 2a to Figure 2c The sliding bearing element is configured as a sleeve-shaped sliding bearing body 61 of the second type and has a C-shaped cross section 62. Here, an opening 63 is configured laterally on the sliding bearing body of the sliding bearing element. An inner contour 64 extending in the direction of the center axis N of the sliding bearing body 61 and an outer contour 65 extending in the same direction are also provided.

[0085] The inner contour 64 and the outer contour 65 are arranged concentrically with respect to the central axis N, so that the plain bearing element 37 also has a compact design.

[0086] The inner contour 64 has a square cross section 66, which results in four inner faces 66a, 66b, 66c and 66d. Grooved recesses 67a, 67b and 67c are provided at the corners adjoining the inner faces. However, the inner faces do not act as sliding bearing surfaces. Instead, the inner contour 64 is provided with fixing means which cooperate with the telescopic element in a form-fitting manner in the assembled state. Figure 7 , the fixing means comprises ribs, of which two ribs 68a and 68b can be seen. They protrude inwardly from the associated inner faces 66a and 66b.

[0087] Figure 8 The perspective detail of the first telescopic element 2 (base element 2a) shows that the Figure 7 The position of the complementary means cooperating with the fixing means of the sliding bearing element 37. The support rail 14 in the form of a raised rail head 18 with a quadrilateral cross section can be seen.

[0088] The raised rail head 18 is provided with a groove-shaped recess 69, with which the raised rib of the sliding bearing element 37 cooperates in a form-fitting manner. In this way, the sliding bearing element 37 is fixed to the base element 2a. When the cylindrical outer contour of the sliding bearing element 37 cooperates with the sliding rail, the cylindrical outer contour of the sliding bearing element serves as a sliding bearing surface.

[0089] Fig. 9 Show according to Figure 3 A detailed view of IX in FIG. It can be seen that the corresponding Figure 5 The sliding bearing element 26 of the sliding bearing element in the intermediate element 40a is shown. The sliding bearing element 26 has a square cross section 56 and is provided with inner bearing surfaces 56a-d on its inner contour 54, which are slidably resting on the rail head of the support rail 45 of the intermediate element 40a. The cylindrical outer contour 55 of the sliding bearing element 26 fits in the sliding rail 15 of the terminal element 3a, which is configured as a rail groove 28. The outer contour 55 has four radially protruding ribs 59a-d, which fit into the recess 60 of the rail groove 28 in a form-locking manner. As a result, the sliding bearing element 26 slides on the rail head of the support rail 45 of the intermediate element 40a. The rail head has sliding bearing surfaces 70a-d. The rail groove has a C-shaped cross section with an opening 71 that is substantially oriented downwards and coincides with the lateral opening 53 of the sliding bearing element 26. The inner side of the rail groove matches the cylindrical outer contour 55 of the sliding bearing element 26. In the assembled state, the lateral openings 53 and the openings 71 can leave room for obliquely arranged retaining arms of the intermediate element 40 a which integrally connect the rail head of the support rail 45 to the intermediate element 40 a .

[0090] Fig.10 Show according to Fig. 9 Detailed view of the X in FIG. The view is a longitudinal section through the sliding rail 15 with the sliding bearing element 26 fixed in the sliding rail. The sliding bearing element has fixing means in the form of radial ribs 59a and 59c on its outer contour 55, with which the sliding bearing element is fixed in the sliding rail 15 in a form-fitting manner. The ribs 59a and 59c protrude radially on the outer contour 55 of the sliding bearing element 26. The inner contour 54 of the sliding bearing element 26 forms sliding bearing surfaces 56a and 56c, which are arranged on the rail head of the support rail 45 and can slide on the rail head.

[0091] Fig.11 Show according to Figure 3 Detailed view of XI in . It can be seen that the Figure 7The sliding bearing element 37 of the sliding bearing element in the intermediate element 40a is arranged on the rail head 17 of the support rail 13 of the base element 2a with its square cross section of the inner contour 64 with four inner faces 66a-d. The cylindrical outer contour 65 of the sliding bearing element fits in the sliding rail 43 of the intermediate element 40a, which is configured as a rail groove. Here, the inner contour 64 of the sliding bearing element 37 is provided with four ribs 68a-d, which protrude inwardly and fit into the recess 69 in a form-locking manner, and the recess is formed according to Fig.12 This is shown by way of example on a quadrilateral cross section of the rail head 18. The same recess is provided for the support rail 13 and the rail head 17. The sliding movement takes place between the sliding rail 43 of the intermediate element and the cylindrical outer contour 65 of the sliding bearing element 37, which is fixed to the support rail 13 of the base element 2a.

[0092] Fig.12 Show according to Fig.11 Detailed view of XII in FIG. This view is a longitudinal section through the sliding track 43 with the sliding bearing element 37 fixed in the sliding track. On the inner contour 64 of the sliding bearing element, the sliding bearing element has fixing means in the form of ribs 68a and 68c, which protrude inwardly and engage in a positively locking manner with the groove-shaped recess (e.g. Fig.11 The sliding bearing element 37 is thus fixed to the support rail 13 in a form-locking manner. Here, the cylindrical outer contour 65 forms a cylindrical sliding bearing surface on which the sliding rail 43 can slide.

[0093] Fig.13 A third embodiment of a telescopic guide 1 according to the invention is shown, which again comprises two telescopic elements 72 and 73, a base element 72a and a terminal element 73a. However, unlike the first embodiment in which the telescopic elements are implemented as double rails, Fig.13 A telescopic element in the form of a single track is provided. The rest of the structure is similar to Figure 1 is consistent with a symmetrical side of the embodiment.

[0094] Fig.14 A fourth embodiment of a telescopic guide 1 according to the invention is shown, Figure 3 Similarly, the telescopic guide is provided with three telescopic elements 74, 75 and 76, a base element 74a, an intermediate element 75a and a terminal element 76a. However, unlike the first embodiment in which the telescopic elements are respectively implemented as double rails, Fig.14 It involves three telescopic elements in the form of a single track. The rest of the structure is similar to Figure 3 is consistent with a symmetrical side of the embodiment.

[0095] Reference numerals list

[0096] 1 Telescopic guide

[0097] 2 Telescopic elements

[0098] 2a Base element

[0099] 3 Telescopic elements

[0100] 3a Terminal components

[0101] 4 Dual Tracks

[0102] 5 Dual Track

[0103] 6 Install the base

[0104] 7 substrate

[0105] 8 substrate

[0106] 9 Sidewall

[0107] 9' sidewall

[0108] 10 Sidewall

[0109] 10' sidewall

[0110] 11 Upper strip

[0111] 12 Top strip

[0112] 13 Support rails

[0113] 14 Support rails

[0114] 15 Sliding track

[0115] 16 Sliding track

[0116] 17 Track Header

[0117] 18 Track Header

[0118] 19 Keep the tabs

[0119] 20 Horizontal piece

[0120] 21. Retaining parts

[0121] 22 Holding arm

[0122] 23 Centerpiece

[0123] 24 Connecting tab

[0124] 25 Keep the tabs

[0125] 26 Sliding bearing elements

[0126] 26a Fixing device

[0127] 26' Sliding bearing element

[0128] 27 Sliding bearing elements

[0129] 27' Sliding bearing element

[0130] 28 Track Slots

[0131] 29 Track slot

[0132] 30 Assembly plane

[0133] 30a Mounting surface

[0134] 31 Splice

[0135] 32 steps

[0136] 33 steps

[0137] 34 splice

[0138] 35 steps

[0139] 36 steps

[0140] 37 Sliding bearing elements

[0141] 37a Fixing device

[0142] 38 Stopper

[0143] 39 Stopper

[0144] 40 Telescopic elements

[0145] 40a Intermediate element

[0146] 41 Double Track

[0147] 42 Double Track

[0148] 43 Sliding track

[0149] 44 Sliding track

[0150] 45 Support rail

[0151] 46 Support rail

[0152] 47 splice

[0153] Area 47a

[0154] Area 47b

[0155] 48 upper side

[0156] 49 Side Area

[0157] 50 Side area

[0158] 51 Sliding bearing body

[0159] 52 C-section

[0160] 53 Side opening

[0161] 54 Inner contour

[0162] 55 Outer contour

[0163] 56a-d Inner bearing surface

[0164] 57 Groove-shaped deep digging

[0165] 58a-c Circular cross section

[0166] 59a-c rib (radial)

[0167] 60 groove-shaped hollow

[0168] 61 Sliding bearing body

[0169] 62 C-section

[0170] 63 Side opening

[0171] 64 Inner contour

[0172] 65 Outer contour

[0173] 66a-d inner surface

[0174] 67a-c Groove-shaped deep digging part

[0175] 68a / b Rib

[0176] 69 groove-shaped hollow

[0177] 70a-d Sliding bearing surface

[0178] 71 Opening

[0179] 72 Telescopic elements

[0180] 72a Base element

[0181] 73 Telescopic elements

[0182] 73a Terminal element

[0183] 74 Telescopic elements

[0184] 74a Base element

[0185] 75 Telescopic element

[0186] 75a Intermediate element

[0187] 76 Telescopic elements

[0188] 76a Terminal element

[0189] D Distance

[0190] D max Extension length

[0191] H Total height

[0192] L min Total length (shortest)

[0193] M Center axis

[0194] S1 Gap

Claims

1. A telescopic guide (1), comprising a first telescopic element (2) extending longitudinally as a base element (2a), and a second telescopic element (3) extending longitudinally as a terminal element (3a), wherein: The two telescopic elements are arranged parallel to each other and can move relative to each other in the longitudinal direction, wherein a sliding bearing is indirectly or directly arranged between the first telescopic element (2) and the second telescopic element (3), provided that the sliding bearing has a first sliding bearing unit, the first sliding bearing unit has at least one sliding bearing element (26, 27, 26', 27') which can be fixed on the first telescopic element (2) in a fixed position and is in sliding contact with the second telescopic element (3), and the second sliding bearing unit has at least one sliding bearing element (37) which can be fixed on the second telescopic element (3) in a fixed position and is in sliding contact with the first telescopic element (2), characterized in that the sliding bearing element (26, 27, 26', 27', 37) is configured as a sleeve-shaped sliding bearing body (51, 61) with a C-shaped cross section (52, 62), and a lateral opening (53, 63) is configured on the sliding bearing body (51, 61) by means of the C-shaped cross section.

2. The telescopic guide (1) according to claim 1, characterized in that Each sleeve-shaped sliding bearing body (51, 61) has an inner contour (54, 64) and an outer contour (55, 65), wherein the inner contour and the outer contour (55, 65) extend in the axial direction of the sliding bearing body (51, 61), wherein the inner contour (54, 64) and the outer contour (55, 65) are arranged concentrically with each other.

3. The telescopic guide (1) according to claim 2, characterized in that The inner contour (54, 64) of the sliding bearing body (51, 61) has a polygonal cross section, and the cross section is preferably square.

4. The telescopic guide (1) according to claim 2 or 3, characterized in that: The outer contour (55, 65) of the sliding bearing body (51, 61) has a polygonal or circular cross section.

5. The telescopic guide according to any one of claims 1 to 4, characterized in that: Two types of sliding bearing elements are provided which have sliding bearing bodies (51, 61) of different configurations.

6. The telescopic guide according to claim 5, characterized in that: A first type of sliding bearing body (51) is configured such that its inner contour (54) is provided as a sliding bearing surface and its outer contour (55) is constructed with fixing means (59a, 59b, 59c, 59d) for fixing it in a fixed position on a telescopic element (2, 3, 40, 72, 73, 74, 75, 76).

7. The telescopic guide according to claim 5 or 6, characterized in that: The second type of sliding bearing body (61) is configured so that its outer contour (65) is provided as a sliding bearing surface and its inner contour (64) is constructed with fixing means (68a, 68b, 68c, 68d) for fixing it in a fixed position on the telescopic element (2, 3, 40, 72, 73, 74, 75, 76).

8. The telescopic guide (1) according to any one of claims 4 to 7, characterized in that The telescopic elements (2, 3, 40, 72, 73, 74, 75, 76) are provided with complementary means (60, 69) which are arranged to cooperate with fixing means (59a, 59b, 59c, 59d, 68a, 68b, 68c, 68d) of the sliding bearing body (51, 61).

9. The telescopic guide (1) according to any one of claims 1 to 8, characterized in that The opening (53, 63) of the C-shaped cross section (52, 62) of the sliding bearing body (51, 61) can be temporarily enlarged by means of elastic deformation of the sliding bearing body (51, 61).

10. The telescopic guide (1) according to any one of claims 1 to 9, characterized in that The first telescopic element (2, 72, 74) extending longitudinally and arranged as a base element (2a, 72a, 74a) is provided with a support rail, and the support rail (13, 14, 45, 46) has either a cross section with a raised rail head (17, 18) or a cross section with a rail groove (28, 29).

11. The telescopic guide (1) according to claim 10, characterized in that The second telescopic element (3, 73, 76) extending longitudinally and arranged as a terminal element (3a, 73a, 76a) is provided with a sliding track (15, 16, 43, 44), and the sliding track (15, 16, 43, 44) complementary to the supporting track (13, 14, 45, 46) of the first telescopic element (2, 40) extending longitudinally has either a cross section with a raised track head (17, 18) or a cross section with a track groove (28, 29).

12. The telescopic guide (1) according to claim 11, characterized in that The cross-sectional configuration of the raised track head (17, 18) is complementary to the inner contour (54, 64) of the sliding bearing body (51, 61), and the cross-sectional configuration of the track groove (28, 29) is complementary to the outer contour (55, 65) of the sliding bearing body (51, 61).

13. The telescopic guide (1) according to any one of claims 10 to 12, characterized in that The telescopic element (2, 40) comprises a support rail (13, 14, 45, 46) with a raised rail head (17, 18) or a sliding rail with a raised rail head, on which a sliding bearing body (51) of the first type can be applied accordingly, and the outer contour (55) of the sliding bearing body of the first type is provided with fixing means (59a, 59b, 59c, 59d) for fixing to the corresponding telescopic element (3, 40) in a fixed position.

14. The telescopic guide (1) according to any one of claims 10 to 13, characterized in that The telescopic element comprises a support rail with a rail groove or a sliding rail (15, 16, 43, 44) with a rail groove (28, 29), on which a second type of sliding bearing body (61) can be applied accordingly, and the inner contour (54) of the second type of sliding bearing body is provided with fixing means (59a, 59b, 59c, 59d) for fixing to the corresponding telescopic element (2, 40) in a fixed position.

15. The telescopic guide (1) according to any one of claims 1 to 14, characterized in that At least one third telescopic element (40) extending longitudinally is provided as an intermediate element (40a).

16. The telescopic guide according to claim 15, characterized in that The intermediate element (40a) comprises sliding rails (43, 44) cooperating with the supporting rails (13, 14) of the base element (2a), and the intermediate element itself comprises supporting rails (45, 46) cooperating with the sliding rails (15, 16) of the terminal elements (3a, 73a, 76a).

17. The telescopic guide (1) according to any one of claims 10 to 16, characterized in that The telescopic elements (2, 3, 40) are each designed as a double track, and the double track has two parallel support tracks (13, 14, 45, 46) and / or two parallel sliding tracks (15, 16, 43, 44).

18. The telescopic guide (1) according to claim 17, characterized in that For the intermediate element (40a) constructed as a double track, two double tracks are arranged overlapping, wherein one double track configuration has parallel sliding tracks (43, 44) and faces the base element (2a), and the other double track configuration has parallel supporting tracks (45, 46) and faces the terminal element (3a).

19. The telescopic guide according to claim 17 or 18, characterized in that: In the case of a double track, lateral guidance can be produced between one of the parallel tracks (support track or sliding track) and the associated sliding bearing body (51, 61), while a lateral gap (S1) is provided between the sliding bearing bodies of the other parallel track.

20. The telescopic guide (1) according to any one of claims 1 to 19, characterized in that The base element (2a, 72a, 74a) is provided with a mounting base (6).

21. The telescopic guide according to any one of claims 1 to 20, characterized in that The base element (2a) has two side elements (9, 10, 9', 10'), and the side elements have a height sufficient to laterally enclose the telescopic element (3a, 40a) arranged above them.

22. The telescopic guide (1) according to claim 21, characterized in that At least one of the side elements is designed as a closed side wall (9, 10, 9', 10').

23. The telescopic guide (1) according to any one of claims 1 to 22, characterized in that The terminal element (3a, 73a, 76a) has a mounting surface (30) for any attachment.

24. The telescopic guide (1) according to claim 23, characterized in that The assembly plane (30) is a closed assembly surface (30a).

25. The telescopic guide (1) according to any one of claims 1 to 24, characterized in that At least one of the telescopic elements (2, 3, 40, 72, 73, 74, 75, 76) is designed in one piece, preferably from metal, particularly preferably from aluminum.

26. The telescopic guide (1) according to any one of claims 1 to 25, characterized in that The sleeve-shaped sliding bearing body (51, 61) with the lateral opening (53, 63) is manufactured from plastic, preferably from a polymer sliding material, particularly preferably from such a sliding material with reinforcing fillers, such as fibers made of plastic or fabric.

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