PLAIN BEARING WITH MULTI-PART CARRIAGE

Description

[0001] The invention relates to a plain bearing according to the preamble of claim 1 as well as a plain bearing arrangement with such a plain bearing and the use of such a plain bearing.

[0002] Plain bearings of this type are well known in the art and are used for the sliding guidance of work devices, particularly as linear guides. Depending on the application, such work devices can have a wide variety of properties. For example, such work devices can be elements of fitness equipment, machine tools such as saws, or holding devices, for example, for displays. It is always important that the plain bearing enables the work device attached to it to be guided along a rail with as little friction and wear as possible. A plain bearing of this type is described, for example, in DE 20 2004 016 094 U1.

[0003] A generic plain bearing comprises a carriage having a carriage body in which a passage extending through the carriage element along a longitudinal axis is provided. A sliding element is arranged in the passage so as to bear against the carriage element and at least partially encloses a sliding opening located within the passage. The plain bearing is designed to receive a cylindrical guide section of a rail in the sliding opening such that its cylinder axis extends along the longitudinal axis, in particular coincides with it, and the guide section received in the sliding opening is at least partially enclosed by the sliding element, thus ensuring sliding guidance of the carriage on the rail.The carriage and thus the sliding bearing can be displaced relative to the rail along the cylindrical axis of the guide section, while the carriage rests against the guide section of the rail exclusively via the sliding element or a plurality of sliding elements. Preferably, the opening and the sliding element enclose the longitudinal axis and thus also the cylindrical guide section accommodated in the sliding opening in an angular range of at least 200°, in particular at least 220°, in particular at least 240°, in particular at least 260°. This ensures that the carriage is reliably held on the guide section of the rail even when an external force acts perpendicular to the longitudinal axis between the rail and the carriage.Furthermore, the corresponding design of the sliding element preferably ensures that even with any external force acting between the rail and the carriage perpendicular to the longitudinal direction, the carriage always rests on the guide section of the rail exclusively via the sliding element.

[0004] In a generic plain bearing arrangement comprising a carriage and a rail, the guide section of the rail is received in the sliding opening of the carriage. The guide section is preferably designed as a cylinder extending along the longitudinal axis with its cylinder axis. The guide section preferably has an extension length along the longitudinal axis that is significantly greater than the extension length of the carriage along the longitudinal axis, in particular at least ten times, in particular at least twenty times this extension length of the carriage. A generic plain bearing arrangement is thus generally preferably designed as a linear guide and serves for the linear, sliding guidance of a working device that is attached to the carriage, while the rail is fixedly attached to a component.

[0005] In this type of plain bearing, sliding elements made of plastic are usually used, in particular sliding elements made of a tribopolymer. This enables lubricant-free sliding guidance of the plain bearing on a rail. However, such sliding elements are subject to wear. Depending on the load on the working device attached to the carriage and the distance traveled by the carriage along the rail, a sliding element can experience such wear that it must be replaced. To replace such a sliding element, the working device must typically be detached from the carriage and the carriage then pulled away from the rail along its longitudinal axis. After this, the sliding element becomes accessible and can be removed from the carriage element and replaced with a new sliding element. However, this involves considerable effort.Due to the load exerted on the slide by the working device and the chambered arrangement of the sliding element in the guideway of the slide, a simple replacement of the sliding element and thus a simple maintenance of the sliding bearing is not possible with this type of sliding bearing.

[0006] The present invention is based on the object of providing a plain bearing and a plain bearing arrangement as well as the use of a plain bearing with which at least one disadvantage of generic plain bearings can be at least partially eliminated.

[0007] As a solution to the aforementioned problem underlying the present invention, the invention proposes a plain bearing having the features of claim 1. The plain bearing according to the invention comprises, analogously to the generic plain bearings explained above, a carriage having a carriage body with a passage extending along a longitudinal axis, wherein a sliding element is arranged in the passage so as to bear against the carriage body, said sliding element at least partially enclosing a sliding opening located within the passage, which is suitable for receiving a cylindrical guide section of a rail elongated along the longitudinal axis. The plain bearing according to the invention can have further features explained in connection with generic plain bearings.According to the invention, the carriage body has two carriage elements arranged next to one another along the longitudinal axis and releasably fixed to one another, each of which forms a longitudinal section of the feedthrough. A longitudinal section of the feedthrough is a section of the feedthrough along the longitudinal axis, wherein the longitudinal axis runs in the longitudinal direction and thus each orientation along the longitudinal axis is an orientation along the longitudinal direction. Each of the carriage elements forms a different longitudinal section of the feedthrough. Each of the carriage elements forms a stop acting along the longitudinal axis for the sliding element, wherein at least a section of the sliding element is fixed in its position along the longitudinal axis between these stops, which are formed by the two carriage elements. For example, the sliding element can be arranged entirely between the two stops.For example, the sliding element can have a projection that forms the aforementioned section of the sliding element and is thus arranged along the longitudinal axis between the stops and is thus fixed in its movement to the longitudinal extension region between the stops. The sliding element is preferably arranged in each of the two longitudinal sections of the feedthrough formed by the two carriage elements. The sliding element can, for example, have two separate partial sliding elements, wherein each of the partial elements is arranged in a different one of the two longitudinal sections of the feedthrough formed by the two carriage elements, and wherein each of the partial sliding elements forms a partial section of the section of the sliding element that is fixed in its position along the longitudinal axis between the stops formed by the two carriage elements.Particularly preferably, the sliding element is formed in one piece, which particularly simplifies the manufacture and maintenance of the plain bearing, in particular the replacement of the sliding element. By determining the position of said section of the sliding element between the stops, the position of the sliding element as a whole, relative to the longitudinal axis, is always determined relative to the carriage.

[0008] The plain bearing according to the invention offers significant advantages compared to generic plain bearings. By forming the slide body with two slide elements arranged side by side along the longitudinal axis and releasably fixed to one another so that they can be removed from one another along the longitudinal axis, accessibility to the sliding element arranged in the passage is ensured when the slide elements are separated from one another. Furthermore, by providing the two slide elements, the stops of the slide can be easily provided. These stops, when the plain bearing is in its intended state, in which the slide elements are fixed to one another, prevent displacement of the sliding element along the longitudinal axis relative to the slide. However, after removal of the slide elements, they no longer entail any restriction of movement of the sliding element, so that the sliding element can then be replaced.Furthermore, the inventive design of the carriage allows a working device fastened to the carriage to remain fastened to one of the carriage elements, while the other of the carriage elements is detached from the working device and is displaced along the longitudinal axis relative to one carriage element and to the working device, in particular while it is guided on the guide section of a rail. The continued guidance of the other carriage element makes reassembly of the carriage, i.e. rejoining the carriage elements, particularly easy. In general, the sliding element preferably has a slot extending continuously along the longitudinal axis, so that the sliding element can be pulled radially off said cylindrical guide section when it is located between the carriage elements along the longitudinal axis.In one embodiment, the slide elements form longitudinal sections of the passage of equal length. In another embodiment, one of the slide elements, with its longitudinal section, forms more than 80% of the extension length of the passage along the longitudinal axis, wherein the sliding element is preferably arranged only in the longitudinal section formed by this slide element, and the other of the slide elements is merely attached to the one slide element in the manner of a cover, forming a stop for the sliding element.

[0009] In one embodiment, the sliding element and the carriage are configured to correspond to one another in such a way that the sliding element can only be removed from the passage without radial compression after the carriage elements have been released from one another and removed from one another along the longitudinal axis and thus along the longitudinal direction. In the intended operating state of the plain bearing, the sliding element can therefore only be removed from the passage if it has previously undergone radial compression, by which the aforementioned section of the sliding element has been moved radially outside the stops formed by the carriage.In one embodiment, when such a cylindrical guide section is arranged in the sliding opening, which is spaced from the sliding element by less than 0.3 mm at four circumferential sections each offset by 60° around the longitudinal axis, the sliding element can only be removed from the passage after the carriage elements have been released from one another and moved apart along the longitudinal axis. The described preferred embodiments enable, on the one hand, a reliable fixing of the sliding element relative to the carriage, and, on the other hand, easy removal of the sliding element after the carriage elements have been released and removed from one another.In one embodiment, the carriage elements and the sliding element are configured to correspond to one another in such a way that when such a cylindrical guide section of the rail is arranged in the sliding opening, which has a diameter such that it rests against the sliding element at two radially opposite ends, after the carriage elements have been released from one another, the carriage elements can each be removed from one another along the longitudinal axis by means of the longitudinal section of the passage formed by them on the guide section of the rail, while the sliding element remains arranged on one of the two carriage elements until the other of the carriage elements is spaced apart from the sliding element along the longitudinal axis, and the sliding element can then be removed from the one carriage element along the longitudinal axis.The carriage elements can thus preferably be moved away from one another along the longitudinal axis via the longitudinal sections of the feedthrough formed by them, each guided on the cylindrical guide section, while the sliding element remains arranged on one of the carriage elements. As soon as the carriage elements are sufficiently spaced from one another so that the sliding element arranged only on one of the carriage elements is radially accessible, the sliding element can be removed from this carriage element by being pulled out along the longitudinal axis from the longitudinal section of the feedthrough formed by this carriage element. In general, the carriage elements preferably enclose the longitudinal axis in the longitudinal section of the feedthrough formed by them, in an angular range of at least 200°, in particular at least 220°, in particular at least 240°, in particular at least 260°.Generally, the sliding element preferably encloses the longitudinal axis in an angular range of at least 200°, in particular at least 220°, in particular at least 240°, in particular at least 260°, in particular in each of the longitudinal sections of the feedthrough formed by the two carriage elements. Preferably, the enclosing is uninterrupted across the angular range mentioned. Preferably, the enclosing is provided over at least 50%, in particular at least 80%, in particular at least 90% of the total length of the feedthrough along the longitudinal axis and / or the length of the sliding element along the longitudinal axis. The enclosing ensures particularly reliable sliding fixation and mounting of the sliding bearing on a cylindrical guide section.

[0010] In one embodiment, the sliding element has a casing part which is designed in the manner of a hollow cylinder, in particular in the manner of a hollow cylinder interrupted by a slot running along the longitudinal axis. This slot enables radial accessibility to the sliding opening. By providing a slot, the sliding element can preferably be clipped radially onto a cylindrical guide section. The casing part forms the sliding opening with its radial inner side. The clear cross section of the hollow cylinder thus corresponds to the cross section of the sliding opening. Particularly preferably, a projection arrangement is formed on a radial outer side of the casing part which runs around the longitudinal axis and is arranged along the longitudinal axis between the stops formed by the two slide elements.The projection arrangement can, for example, be designed to extend circumferentially around the longitudinal axis over a defined angular range, in particular a preferably large angular range as explained above, or can have projection sections spaced apart from one another in the circumferential direction, which are preferably distributed over a correspondingly large angular range (as explained above, preferably at least 200°, preferably at least 240°, preferably at least 260°). The projection arrangement is arranged at least partially along the longitudinal axis between the stops formed by the two carriage elements. For example, the projection arrangement can have several projection sections arranged between the stops and at least one further projection section arranged outside the stops.This additional projection section can, for example, fulfill a different function than the other projection sections, for example, provide a rotational lock, and thus be designed as an anti-rotation section. In general, the projection arrangement preferably has a plurality of projection sections distributed around the longitudinal axis, at least one of which is designed as an anti-rotation section and is arranged between two additional stops of the carriage that act perpendicular to the longitudinal direction and are spaced apart from one another in a direction of rotation about the longitudinal axis. By arranging the anti-rotation section between the additional stops of the carriage, a rotational position of the sliding element relative to the carriage is thus determined with respect to a rotation about the longitudinal axis.Particularly preferably, the carriage elements jointly form each of the further stops, so that each of the carriage elements forms a part of each of the further stops. Particularly preferably, all projection sections of the projection arrangement are arranged along the longitudinal axis between the aforementioned stops of the carriage.

[0011] Particularly preferably, the slide elements jointly form, at their ends facing each other along the longitudinal axis, a groove which runs around the longitudinal axis and forms the stops of the two slide elements. The groove preferably runs continuously around the longitudinal axis, preferably over an advantageously large angular range as specified above. The aforementioned section of the sliding element is thus arranged within the groove. The section is preferably formed by the projection arrangement. Accordingly, the projection arrangement is preferably arranged at least partially in the groove, namely at least with the part with which it forms the aforementioned section of the sliding element. Particularly preferably, the anti-rotation section is also arranged in the groove, relative to a direction along the longitudinal axis.The slide preferably has a recess that opens into the passage, wherein the anti-rotation section of the sliding element is arranged in the recess. The recess opens radially into the passage, so that the anti-rotation section extends radially from the passage into the recess. The recess is preferably arranged in a direction along the longitudinal axis within said groove, so that the recess opens into the groove. Alternatively or additionally, the recess preferably forms a continuous connection from an outer side of the slide to the passage.

[0012] Generally, the slide elements are preferably formed in one piece, particularly preferably made in one piece from a metal or a metal alloy. The slide elements are preferably manufactured by die casting. Generally, the sliding element is preferably manufactured from a tribological polymer, in particular manufactured in one piece from the tribological polymer, in particular by injection molding. Such a tribological polymer is a polymer optimized with regard to wear reduction and friction reduction. Typically, such a tribological polymer comprises a base polymer, for example the thermoplastics polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride,

[0013] Polytetrafluoroethylene, and phenolic resins in the case of thermosets. Fine-particle solid lubricants, for example, molybdenum disulfide or graphite, and / or fillers, for example, plastic or textile fibers or particles, are added to this base polymer. Generally, the sliding element preferably has grooves running along the longitudinal axis on the inside of its casing. These grooves can, on the one hand, prevent increased friction due to contamination between the sliding element and the guide section of a rail. On the other hand, the grooves allow the sliding element to exhibit preferred radially elastic properties, and, preferably, a contact surface of the sliding element on the guide section can be reduced.

[0014] In one embodiment, the plain bearing has at least one pin that extends along the longitudinal axis. The pin is fixed to a side of one of the slide elements that faces the other of the slide elements and thus faces along the longitudinal axis. The pin is arranged in a hole-like, in particular blind-hole-like, recess that is provided on the side of the other element facing the one slide element. Accordingly, the pin engages in this recess to define a position of the slide elements relative to one another perpendicular to the longitudinal axis. For example, a rotational position of the slide elements relative to one another with respect to a rotation about the longitudinal axis can be clearly defined if a cylindrical guide section is located in the passage of the slide.The plain bearing preferably has two pins spaced apart from one another perpendicular to the longitudinal axis, wherein the rotational position can be clearly defined by providing two pins, wherein these pins are arranged on the side of one of the slide elements, as explained for the one pin, and each engage in a recess arranged on the other of the slide elements. The pin is preferably fixed to one of the slide elements by providing a hole-like, in particular blind-hole-like, recess on the said side of this one slide element, into which the pin is inserted. The fixing of the pin refers to a fixing perpendicular to the longitudinal axis. The pin preferably has substantially the same cross-section as the hole-like recess, so that the pin is held in the recess with as little play as possible. By providing the one pin orseveral pins, the intended joining of the slide elements to create the slide can be particularly simplified and the robustness of the slide can be particularly increased.

[0015] In one embodiment, the plain bearing has a screw extending along the longitudinal axis, which presses with its screw head along the longitudinal axis against an outer side of one of the slide elements. Its threaded bolt extends through this one slide element and is screwed into a threaded hole provided in the other of the slide elements. This ensures a reliable, releasable fixation of the slide elements to one another.

[0016] In one embodiment, the carriage comprises a fastening device for fastening a working device to the carriage. The fastening device has a support surface for the working device, which lies in one plane and has two partial surfaces, wherein each of the carriage elements forms one of the partial surfaces. Alternatively or additionally, the carriage can have at least one channel running perpendicular to the longitudinal axis, in particular at least two channels running perpendicular to the longitudinal axis, for receiving a fastening means for fastening the working device to the carriage. For example, the fastening means can be a screw that is screwed through the channel into a corresponding thread of the working device and which presses against the carriage with its screw head, such that the working device is fixed to the carriage via the fastening means.Because each of the slide elements has a partial surface of the support surface and / or each of the slide elements has one of the two channels, the working device can be attached to both slide elements. Accordingly, one of the slide elements can be detached from the working device and removed along the longitudinal axis from the working device and the slide element still attached to it in order to replace the sliding element. The channels particularly preferably run parallel to one another. Particularly preferably, at least one of the channels is formed on each of the slide elements. Particularly preferably, at least one of the channels passes through one of the partial surfaces, so that at least one of the channels passes through each of the partial surfaces. When the channel passes through the partial surface, the channel opens into the partial surface.Accordingly, the attachment of the working device within the partial area can be carried out through the mentioned channel.

[0017] The invention further relates to a plain bearing arrangement comprising a plain bearing according to the invention and a rail, wherein the rail is arranged with its guide section in the sliding opening and bears against the sliding element. The guide section preferably bears against the sliding element at two of its radial ends, i.e., perpendicular to the longitudinal axis, in particular at four radial ends, each of which is offset from one another by a rotation angle of 60° around the longitudinal axis. Preferably, the guide section is several times longer than the carriage along the longitudinal axis.

[0018] The invention further relates to the use of a plain bearing arrangement according to the invention. In the inventive use, to replace the sliding element, the carriage elements are detached from one another and moved apart along the longitudinal axis, while they are both continuously guided on the guide section of the rail and the longitudinal section of the passage formed by the respective carriage element engages around this guide section, in particular over the aforementioned advantageous angular range. In the inventive use, the sliding element is completely removed from the passage of the carriage along the longitudinal axis between the carriage elements that are spaced apart from one another and guided on the guide section of the rail and is replaced with a new sliding element.Removal from the feedthrough can, for example, be achieved by leaving the sliding element in the longitudinal section of the feedthrough formed by one of the carriage elements, while the other of the carriage elements is removed from the one carriage element, after which the sliding element is also removed from the longitudinal section of the feedthrough formed by one of the carriage elements. The sliding element is replaced by a new sliding element by inserting the new sliding element into the feedthrough of the carriage after the sliding element has been removed between the carriage elements in a direction along the longitudinal axis, after which the carriage elements are connected to one another and fixed to one another, determining the position of the new sliding element relative to the carriage.The new sliding element is thus guided between the carriage elements with respect to a direction along the longitudinal axis until it is arranged in alignment with the longitudinal sections of the passage formed by the carriage elements, after which the carriage elements are moved towards one another along the longitudinal axis and the sliding element is received in the said longitudinal sections of the passage, so that the sliding element is introduced into the passage of the carriage along the longitudinal axis.

[0019] Features described with reference to the plain bearing according to the invention or the use according to the invention can be provided analogously in the use according to the invention or the plain bearing according to the invention. Furthermore, it should be noted that the designation "one slide element" or "the other slide element" always serves only in the immediate context of the designation to distinguish the two slide elements from one another. The features described in the respective context with reference to "one" or "the other" slide element can optionally be provided for either of the two slide elements, so that the designations "one" and "the other" are interchangeable.

[0020] The invention is explained in more detail below with reference to two figures using an exemplary embodiment.

[0021] They show: Figure 1: in a schematic principle representation, an exploded view of a plain bearing according to the invention; Figure 2: in various schematic principle representations, various views of the embodiment of a plain bearing according to the invention according to Figure 1 .

[0022] In Figure 1An exploded view of an embodiment of a plain bearing 1 according to the invention is shown in a schematic principle representation. The plain bearing 1 comprises a carriage formed by a first carriage element 2 and a second carriage element 3. The plain bearing 1 further comprises a sliding element 4. The sliding element 4 has a casing part 40, which is designed in the manner of a hollow cylinder interrupted by a slot running along the longitudinal axis X. A projection arrangement 41 is provided on the radial outer side of the casing part 40. The projection arrangement 41 is provided in the longitudinal center of the casing part 40, which is generally advantageous according to the invention. Figure 1 is an exploded view and therefore not the plain bearing 1 in its intended condition. Figure 1However, it is apparent that the carriage elements 2, 3 each form a longitudinal section of a passage of the carriage, into which a longitudinal section of the sliding element 4 can be inserted along the longitudinal axis X, wherein the sliding element 4 forms a sliding opening on its radial inner side for receiving a cylindrical guide section of a rail. Both the carriage elements 2, 3 and the sliding element 4 enclose the longitudinal axis X over an angular range, based on an angle of rotation about the longitudinal axis X, of more than 240°. Furthermore, it is apparent that the carriage elements 2, 3 each form a section of a groove in which the projection arrangement 41 is received in the intended, assembled state of the carriage, whereby the longitudinal position of the casing part 4 relative to the carriage elements 2, 3 is clearly defined.The slide elements 2, 3 further each have a channel 24, 34 which extends perpendicular to the longitudinal axis X and passes through a partial surface formed by the respective slide element 2, 3. The partial surfaces formed by the slide elements 2, 3 are each flat and, in the assembled state of the slide, form, as can be seen from . Figure 2a As can be seen, they together form a flat support surface for a work device. Figure 1 It is further evident that in order to determine the position of the carriage elements 2, 3 perpendicular to the longitudinal axis X, pins 22 are provided, which are inserted into blind hole-like recesses provided at the mutually facing longitudinal ends of the two carriage elements 2, 3 in the assembled state of the carriage. Figure 1Only one of the blind-hole-like recesses of the first slide element 2 is shown. Furthermore, the plain bearing 1 comprises a screw 5, which extends through a hole 23 provided in the first slide element 2 and is screwed into the second slide element 3 as intended, so that its screw head presses against the first slide element 2 and fixes the two slide elements 2, 3 with respect to their relative positions along the longitudinal axis X.

[0023] In Figure 2 comprehensively the Figures 2a, 2b, 2c and 2d Various views of the plain bearing 1 are shown. The plain bearing 1 is shown in its intended state, in which the slide elements 2, 3 are fixed to one another in a fixed position, forming the slide 100. Figure 2ashows a view from above of the flat support surface intended for supporting a working device, which is formed jointly by the slide elements 2, 3 and through which the channels 24, 34 provided in the slide elements 2, 3 pass. In Figure 2a Furthermore, the recess formed by the two slide elements 2, 3 by a respective recess section 210, 310 can be seen, which opens into the passage formed by the slide 100 and which, in connection with Figure 2c is explained in more detail. In Figure 2b is a view along the longitudinal axis X of the first slide element 2 of the plain bearing 1 according to Figure 2a shown. From Figure 2bIt can be seen that the screw 5 presses with its screw head against the first slide element 2 to fix its longitudinal position relative to the second slide element 3, and that the sliding element 4 is arranged in the passage formed by the slide 100, which encloses with its radial inner side a sliding opening 10 located within the passage, in this case over an angular range around the longitudinal axis X of more than 260°. Furthermore, Figure 2b It can be seen that the sliding element 4 has grooves 42, each of which is provided between two sections of the sliding element 4, which are intended to bear against a cylindrical guide section of a rail.

[0024] In the Figures 2c and 2d are the ones in Figure 2a shown in views BB and AA. From Figure 2cIt can be seen that the projection arrangement 41 of the casing part 40 overlaps perpendicular to the longitudinal direction with the second slide element 3, so that the second slide element 3 forms a stop 31 which, together with the Figure 1 shown stop 21 of the first carriage element 2 determines the longitudinal position of the projection arrangement 41 and thus also of the sliding element 4 as a whole relative to the carriage 100. From Figure 2c It is further apparent that the projection arrangement 41 comprises a projection section designed as an anti-rotation section 410, which projects into the partial recess 310 formed by the second slide element 3 and also, although in Figure 2cnot shown, opens into the partial recess 210 formed by the first slide element 2. The recess formed by the partial recesses 210, 310 thus forms further stops of the slide 100, between which the rotation-preventing section 410 is arranged. These further stops act with respect to a direction perpendicular to the longitudinal direction. By arranging the rotation-preventing section 410 in the aforementioned recess, a rotational position of the sliding element, related to a rotation about the longitudinal axis, is determined relative to the slide 100. Figure 2c Furthermore, the blind hole-like recesses 32 on the side of the second slide element 3 facing the first slide element 2 can be seen, into which the Figure 1 shown pins 22 engage to determine a relative rotational position of the carriage elements 2, 3, related to a rotation about the longitudinal axis X, to each other. Figure 2ba section through the channel 24 of the first slide element 2 is shown. In Figure 2d the threaded bolt of the screw 5 can be seen, which extends through the first slide element 2. Furthermore, Figure 1 the sliding opening 10 formed by the sliding element 4 and the grooves 42 provided on the radial inside of the sliding element 4 can be seen. List of reference symbols

[0025] 1Sliding bearing 2First slide element 3Second slide element 4Sliding element 5Screw 10Sliding opening 21Stop 22Pin 23Hole 24Channel 31Stop 32Blind hole-like recess 34Channel 40Shell part 41Protrusion arrangement 42Groove 100Slide 210Partial recess 310Partial recess 410Anti-rotation section XLongitudinal axis

Claims

1. Sliding bearing (1), comprising a carriage (100) having a carriage body with a passage that extends along a longitudinal axis (X), wherein in said passage, a sliding element (4) is arranged in a manner bearing against the carriage body, which sliding element surrounds a sliding opening (10) within the passage at least in sections, the sliding opening (10) being configured to receive a cylindrical guide section of a rail elongate along the longitudinal axis (X), characterized in that the carriage body comprises two carriage elements (2, 3) juxtaposed along the longitudinal axis (X) and releasably fixed to one another, each of which forming a longitudinal section of the passage, wherein each of the carriage elements (2, 3) forms a stop for the sliding element (4) operative along the longitudinal axis and wherein at least one section of the sliding element (4) is fixed in its position along the longitudinal axis (X) between these stops.

2. Sliding bearing (1) according to claim 1, characterized in that the sliding element (4) can be removed from the passage without radial compression only after releasing the carriage elements (2, 3) from one another and spacing the carriage elements (2, 3) from one another along the longitudinal axis (X).

3. Sliding bearing (1) according to claim 2, characterized in that the carriage elements (2, 3) and the sliding element (4) are designed to correspond to one another in such a way that, when such a cylindrical guide portion of the rail is arranged in the sliding opening (10), which has such a diameter that it bears against the sliding element (4) at two radially opposite ends in each case, after the carriage elements (2, 3) have been released from one another, the carriage elements (2, 3) can each be spaced from one another along the longitudinal axis (X), guided by the longitudinal section of the passage formed by them on the guide portion of the rail, while the sliding element (4) remains arranged on one of the two carriage elements (2, 3) until the other of the carriage elements (2, 3) is spaced apart from the sliding element (4) along the longitudinal axis (X), and then the sliding element (4) can be removed from the one carriage element (2, 3) along the longitudinal axis (X).

4. Sliding bearing (1) according to any one of the claims, characterized in that the carriage elements (2, 3) respectively surround the longitudinal axis (X) in the longitudinal section of the passage formed by them in an angular range of at least 200°, in particular at least 240°, wherein in particular the sliding element (4) in each of the longitudinal sections of the passage formed by the two carriage elements (2, 3) surrounds the longitudinal axis (X) in an angular range of at least 200°, in particular at least 240°.

5. Sliding bearing (1) according to any one of the preceding claims, characterized in that the sliding element (4) has a jacket part (40) which is designed in the manner of a hollow cylinder, in particular interrupted by a slot running along the longitudinal axis (X), and which forms the sliding opening (10) with its radial inner side, wherein a projection arrangement (41) is formed in particular on a radial outer side of the jacket part (40), which projection arrangement (41) revolves around the longitudinal axis (X) and is arranged at least partially along the longitudinal axis (X) between the stops (21, 31) formed by the two sliding elements (2, 3).

6. Sliding bearing (1) according to any one of the preceding claims, characterized in that the projection arrangement (41) has a plurality of projection sections distributed around the longitudinal axis (X), of which at least one is designed as an anti-rotation section (410) and is arranged between two further stops (21, 31) of the carriage (100) acting perpendicularly to the longitudinal direction, of which in particular one is formed by each of the carriage elements (2, 3), for fixing a rotational position of the sliding element (4) relative to the carriage (100) with respect to a rotation about the longitudinal axis (X).

7. Sliding bearing (1) according to any one of claims 5 or 6, characterized in that the sliding element (4) has grooves running along the longitudinal axis (X) on the inside of its jacket part (40).

8. Sliding bearing (1) according to any one of claims 5 to 7, characterized in that the sliding elements (2, 3) at their ends facing one another along the longitudinal axis (X) jointly form a groove running around the longitudinal axis (X) and forming the stops (21, 31) of the two sliding elements (2, 3), wherein the projection arrangement (41) is arranged at least partially in the groove.

9. Sliding bearing (1) according to any one of claims 6 to 8, characterized in that the carriage (100) has a recess which opens into the passage, wherein the anti-rotation section (410) of the sliding element (4) is arranged in the recess, wherein in particular the recess forms a continuous connection from an outer side of the slide (100) to the passage.

10. Sliding bearing (1) according to any one of the preceding claims, characterized in that the carriage elements (2, 3) are formed in one piece, in particular are manufactured in one piece from a metal or a metal alloy, in particular by means of die casting.

11. Sliding bearing (1) according to any one of the preceding claims, characterized in that the sliding element (4) is manufactured from a tribopolymer, in particular is manufactured in one piece.

12. Sliding bearing (1) according to any one of the preceding claims, characterized in that at least one pin (22), which extends along the longitudinal axis (X), is fixed on a side of one of the carriage elements (2, 3) facing the other of the carriage elements (2, 3), the pin (22) engaging in a hole-like, in particular blind-hole-like recess (32) which is provided on the side of the other carriage element (2, 3) facing one carriage element (2, 3), for fixing a rotational position of the carriage elements (2, 3) relative to one another with respect to a rotation about the longitudinal axis (X).

13. Sliding bearing (1) according to any one of the preceding claims, characterized in that the sliding bearing (1) has a screw (5) extending along the longitudinal axis (X), which presses with its screw head along the longitudinal axis (X) against an outer side of one of the carriage elements (2, 3) and which extends with its threaded bolt through this one carriage element (2, 3) and is screwed into a threaded hole provided in the other of the carriage elements (2, 3).

14. Sliding bearing (1) according to any one of the preceding claims, characterized in that the carriage (100) comprises a fastening device for fastening the working device to the carriage (100), wherein the fastening device has a support surface for the working device which lies in a plane and has two partial surfaces, wherein each of the carriage elements (2, 3) forms in each case one of the partial surfaces, and / or wherein the carriage (100) has at least one channel (24, 34) extending perpendicularly to the longitudinal axis (X), in particular at least two channels (24, 34) extending perpendicularly to the longitudinal axis (X), for receiving a fastening means for fastening the working device to the carriage (100), in particular the channels (24, 34) extending parallel to one another and at least one of the channels (24, 34) being formed by each of the carriage elements (2, 3) and in particular at least one of the channels (24, 34) passing through each of the partial surfaces.

15. Sliding bearing arrangement comprising a sliding bearing (1) according to any one of the preceding claims and a rail, wherein the rail is arranged with its guide section in the sliding opening (10) and bears against the sliding element (4), wherein in particular the guide section along the longitudinal axis (X) is many times longer than the slide (100).

16. Use of a sliding bearing arrangement according to claim 15, characterized in that for replacing the sliding element (4), the carriage elements (2, 3) are released from one another and spaced from one another along the longitudinal axis (X) while they are both guided uninterruptedly on the guide section of the rail and the longitudinal section of the passage formed by the respective carriage element (2, 3) surrounds this guide section, the sliding element (4) being completely removed from the passage of the carriage (100) along the longitudinal axis (X) between the carriage elements (2, 3) spaced from one another and guided on the guide section of the rail and being replaced by a new sliding element (4) by completely removing the sliding element (4) from the passage of the carriage (100) and replacing it by a new sliding element (4) by inserting the new sliding element (4) into the passage of the carriage (100) along the longitudinal axis (X) after the sliding element (4) has been removed between the carriage elements (2, 3), whereupon the carriage elements (2, 3) are connected to one another and fixed to one another, fixing the position of the new sliding element (4) relative to the carriage (100).