LINEAR SLIDE BEARING WITH SNAP-ON CARRIAGE

Description

[0001] The invention relates to a plain bearing with a rail and a carriage, a carriage of such a plain bearing and a use of such a plain bearing.

[0002] Generic plain bearings are well known in the art and are used for the sliding guidance of work devices, particularly as linear guides. Depending on the field of application, such work devices can have a wide variety of properties. For example, such work devices can be elements of tools. For example, such work devices can be holding devices, for example for displays, via which elements can be mounted as easily as possible. 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. At the same time, the work device should be reliably held on the rail. The invention relates in particular to such plain bearings that are used in vehicle construction, particularly in commercial vehicles such as tractors and cleaning vehicles.In such commercial vehicles, it is often desirable to easily mount a work device in the cockpit so that it can be moved longitudinally. To ensure simple and reliable installation of the work device, the plain bearing is usually permanently installed in the vehicle by attaching the rail of the plain bearing to a vehicle part, whereas the work device is removably attached to the carriage. For this purpose, corresponding fastening devices are provided on the carriage and the work device. However, the fastening devices known in the prior art only inadequately meet the requirements of ensuring a removably fixation of a work device to the carriage in a space-saving and easy-to-use manner.

[0003] DE 94 17 944 U1 discloses a clamping and braking device for a linear guide. US 3,574,468 A discloses an optical bench with a prismatic guide rail, which is encompassed by a guide carriage that can be locked relative to the guide rail. Further prior art is described in US 2010 / 074711 A1. The present invention is based on the object of providing a plain bearing, a carriage for such a plain bearing, and a use of such a plain bearing, with which at least one problem of generic plain bearings is at least partially remedied.

[0004] As a solution to the problem underlying the invention, the invention proposes a plain bearing with the features of claim 1. The plain bearing comprises a rail and a carriage. The rail is elongated in a longitudinal direction to enable the carriage to be displaced along the rail in the longitudinal direction. The rail has two guide sections that are elongated in the longitudinal direction and run alongside one another. The guide sections are thus spaced from one another in a transverse direction perpendicular to the longitudinal direction. The provision of at least two guide sections running alongside one another is conducive to reliable guidance of the carriage on the rail. The carriage has a guide receptacle assigned to each guide section.A first guide receptacle of the carriage is thus assigned to a first guide section of the rail, and a second guide receptacle of the carriage is assigned to a second guide section of the rail. Since a plain bearing according to the invention is an arrangement comprising a rail and a carriage, the rail and carriage with their guide sections or guide receptacles are specifically designed to correspond to one another so that, in an operating state of this arrangement, the carriage is held in a fixed position relative to the rail in any direction perpendicular to the longitudinal direction, but can be displaced in the longitudinal direction relative to the rail. Typically, the carriage is held on the rail in the operating state in such a way that it can be displaced in the longitudinal direction relative to the rail with as little friction as possible.For this purpose, the guide mount of the carriage, in the operating state, usually slides against the associated guide section of the rail, either directly, in that the guide section or guide mount is made of a sliding material, or indirectly, in that a sliding element is provided in the guide mount. This sliding element is fixed in position relative to the guide mount and slides along the associated guide section of the rail when the carriage is displaced relative to the rail. For example, the guide mount can be directly or indirectly attached to the guide section in some sections.In the operating state explained, each of the guide sections is arranged in its associated guide receptacle and encompassed by it perpendicular to the longitudinal direction, fixing the carriage relative to the rail perpendicular to the longitudinal axis and ensuring longitudinal displacement of the carriage relative to the rail. The guide receptacle encompasses the associated guide section at least to such an extent that, due to the two guide receptacles enclosing the two guide sections, the position of the carriage relative to the rail is fixed perpendicular to the longitudinal direction in the operating state. Preferably, each of the guide sections has a guide axis along which it extends in the longitudinal direction, in particular in the manner of a cylinder.Preferably, each guide receptacle encompasses the guide section assigned to it over at least 180° around its guide axis; particularly preferably, at least one of the guide receptacles encompasses the associated guide section over at least 200°, in particular at least 220° around its guide axis. Preferably, at least the first guide section, in particular the first and second guide sections, are designed in the manner of a cylinder with a round, in particular circular, cross-section. According to the invention, the carriage has a carriage body and an actuating arm, which together form the first guide receptacle of the carriage. The carriage body and the actuating arm thus each form a receiving part of the guide receptacle, with which they each encompass a section of the first guide section in the operating state.The receiving part formed by the carriage body preferably encompasses the guide section over a larger angle around its guide axis than the guide part formed by the actuating arm. Preferably, both receiving parts encompass the first guide section over an angular range of at least 30° around its guide axis. Preferably, the actuating arm forms at least 10%, in particular at least 20%, in particular between 10% and 30% of the area with which the first guide receptacle points towards the first guide section in the operating state, enclosing the latter. The actuating arm is fixedly guided on the carriage body so as to be displaceable perpendicular to the longitudinal direction to enable the first guide receptacle to be opened by displacing the actuating arm in order to remove the associated first guide section from the first guide receptacle along a removal direction running perpendicular to the longitudinal direction.The actuating arm is thus displaceable relative to the carriage body perpendicular to the longitudinal direction, in particular in a displacement direction perpendicular to the longitudinal direction, while remaining fixed to the carriage body. Displacement from the operating state enables opening of the first guide receptacle, i.e., an opening is formed on a side of the first guide receptacle facing perpendicular to the longitudinal direction such that the first guide section can be removed from the first guide receptacle through this opening.The opening of the first guide receptacle can be effected, for example, by enlarging a cross section of the first guide receptacle perpendicular to the longitudinal direction by displacing the actuating arm relative to the slide body, while wall sections of the first guide receptacle defining the guide, formed on the one hand by the actuating arm and on the other hand by the slide body, are moved apart perpendicular to the longitudinal direction, so that a corresponding opening is realized in the wall of the first guide receptacle.At this point it should be noted that the first guide receptacle does not necessarily fully encompass the first guide section in the operating state, but at least to such an extent that, in conjunction with the second guide receptacle encompassing the second guide section of the rail, the carriage is fixed in its position perpendicular to the longitudinal direction relative to the rail, so that when a relative force is exerted in any direction perpendicular to the longitudinal direction, the carriage cannot be removed from the rail and thus the first guide section cannot be guided out of the first guide receptacle. Accordingly, the wall of the first guide receptacle in the operating state has at most openings through which the first guide section cannot be guided perpendicular to the longitudinal direction.Particularly preferably, the actuating arm is guided reversibly movable relative to the carriage body perpendicular to the longitudinal direction, so that the plain bearing can be reversibly brought from the operating state into an assembled state in which, as explained, the first guide section can be removed from the first guide receptacle perpendicular to the longitudinal direction, and can be brought from the assembled state by inverse displacement back into the operating state in which the carriage is fixed perpendicular to the longitudinal direction relative to the rail.

[0005] The invention offers significant advantages over the prior art. While the prior art assumes that reliable guidance of the carriage relative to the rail requires the carriage to engage around the rail in such a way that it must be possible to disassemble a working device from the carriage so that the working device can be removed from the location where the plain bearing is arranged, the invention takes a new approach. The special design of the plain bearing makes it possible to design the carriage so that it can be removed from the rail and placed back on again, so that the carriage can be permanently mounted on a working device and the working device can be mounted together with the carriage at a wide variety of locations on a rail corresponding to the carriage.The special design of the carriage, in conjunction with its corresponding rail, ensures that, despite being easily removable from and attached to the rail, the carriage is reliably held to the rail during operation and can only move longitudinally relative to the rail. This eliminates the need for bulky fastening devices on the carriage and the working device, which would allow the working device to be removed from the carriage. It is essential that the carriage can be removed from and attached to the rail in a direction perpendicular to the longitudinal direction.It is therefore not necessary to place the carriage on the rail at one longitudinal end in order to mount the carriage on the rail, but the carriage can be clipped onto the rail at any longitudinal position along the extension of the rail, along which it is held so as to be longitudinally displaceable relative to the rail in the operating state. Particularly preferably, the actuating arm or an actuating lever provided for actuating the actuating arm projects perpendicular to the longitudinal direction beyond the carriage body, such that the actuating arm or the actuating lever forms an end section of the carriage and can be easily grasped by a person. Particularly preferably, the actuating arm or the actuating lever projects perpendicular to the longitudinal direction relative to the carriage body over a length which is at least half the distance between the guide receptacles of the carriage perpendicular to the longitudinal direction.Preferably, the guide receptacles are arranged next to one another in a transverse direction and extend with their receptacle axes, which are aligned with the guide axes in the operating state, preferably in the longitudinal direction, with the actuating arm or the actuating lever projecting beyond the carriage body in the transverse direction as explained. This ensures a particularly easy-to-use design of the actuating arm.

[0006] In one embodiment, the slide body comprises a base body and a fastening body, which are releasably fixed to one another. The base body is preferably formed in one piece. The fastening body is preferably formed in one piece, but in less preferred embodiments, it can be formed in multiple parts. The base body and fastening body can be fixed to one another, for example, by means of a screw or by means of a releasable clamp closure. Preferably, the actuating arm can only be separated from the slide body after the base body and the fastening body have been released from one another. The base body and fastening body thus ensure reliable fixation of the actuating arm to the slide body.Since the slide body has a base body and a fastening body, the actuating arm can be designed to be particularly robust and reliably fixed relative to the slide body, while in the fixed state it is mounted so as to be movable relative to the slide body perpendicular to the longitudinal direction.

[0007] According to the invention, a guide is provided between the actuating arm and the carriage body, by means of which guide the actuating arm is fixed to the carriage body so as to be displaceably guided over a displacement path running perpendicular to the longitudinal direction. The guide is preferably formed by a first guide part of the carriage body and a second guide part of the fastening arm, wherein the first guide part is preferably formed jointly by the base body and the fastening body of the carriage body. The displacement path preferably runs in a straight line along a straight displacement direction that is perpendicular to the longitudinal direction. According to the invention, the guide forms a stop that defines one end of the displacement path, wherein the actuating arm is displaceable relative to the base body along the displacement path, starting from the operating state until the stop is reached.The provision of a guide that provides a stop is particularly advantageous for reliably fixing the actuating arm to the carriage body while ensuring its displaceability relative thereto. In the assembled state explained above, the actuating arm preferably rests against the stop, in which the first guide section of the rail can be removed from the first guide receptacle along the removal direction and preferably reinserted counter to the removal direction. The removal direction can, for example, be a straight or a curved direction. Particularly preferably, the guide is a linear guide along a transverse direction running perpendicular to the longitudinal direction. Generally preferably, the longitudinal direction and the transverse direction are each a straight direction. Generally preferably, the transverse direction corresponds to the explained displacement direction.

[0008] When the actuating arm rests against the stop, an opening is formed in the first guide receptacle through which the first guide section can be removed. The guide receptacles and the guide sections are preferably designed to correspond to one another in such a way that the second guide section can only be removed from the second guide receptacle perpendicular to the longitudinal direction after the first guide section has been removed from the first guide receptacle. Because the actuating arm prevents removal of the first guide section from the first guide receptacle in the operating state, removal of the second guide section from the second guide receptacle is also prevented. Accordingly, in the assembled state, after the first guide section has been released, it is possible to remove it from the first guide receptacle and subsequently to remove the second guide section from the second guide receptacle.This cascaded removability is particularly advantageous for achieving easy detachability while simultaneously ensuring reliable fastening of the carriage to the rail during operation. This cascaded removability can be ensured, for example, by the two guide receptacles engaging behind the two guide sections in such a way that the first guide receptacle engages behind the first guide section on a first transverse side of the first guide section, and the second guide receptacle engages behind the second guide section on a second transverse side, with the transverse sides pointing in opposite directions along the transverse direction.

[0009] In one embodiment, the two guide sections each extend along a guide axis assigned to them, which runs in the longitudinal direction. When the actuating arm rests against the stop of the guide in the operating state, the second guide section is mounted in the second guide receptacle so as to be rotatable about its guide axis, and the first guide section can be removed from the first guide receptacle by rotating the carriage about the guide axis of the second guide section. The removal direction is thus a direction curved around the guide axis of the second guide section. The second guide section is therefore fundamentally designed to correspond to the second guide receptacle in such a way that it is mounted therein so as to be rotatable about its guide axis.However, in the operating state, the second guide section is prevented from rotating because the first guide section is arranged in the first guide receptacle and is engaged behind it. It should be generally noted at this point that the two guide receptacles are preferably rigidly connected to one another, and the two guide sections are rigidly connected to one another. By ensuring that the first guide section can be removed from the first guide receptacle in the assembled state or when the actuating arm rests against the stop of the guide, the second guide section can be rotated while the first guide section is removed from the first guide receptacle.

[0010] The rail has a rail body, wherein the guide sections of the rail are each connected to the rail body via a web section. The guide receptacles each have a longitudinally continuous side opening through which, in the operating state, the web sections extend to the guide sections arranged in the guide receptacles. The guide receptacles are preferably hollow-cylindrical, wherein the cylinder axis corresponds to their guide axis and extends in the longitudinal direction, wherein the side opening corresponds to a slot in the jacket opening of the hollow cylinder. The hollow cylinder can, for example, have a round, in particular circular, or polygonal, in particular rectangular, cross-section.The web sections have a smaller width than the guide sections in a direction perpendicular to the longitudinal direction, the width of the web section being relative to the width of the guide section assigned to it, which is connected to the rail body via the web section. Generally speaking, the rail body preferably extends in the transverse direction between the guide sections. Generally speaking, the web sections extend from the rail body to the respectively assigned guide section in a direction that runs obliquely to the longitudinal direction and obliquely to the transverse direction, the width running perpendicular to the longitudinal direction and perpendicular to this direction of extension, with which they each extend from the machine body through the side opening to the assigned guide section.In the operating state, the side opening of the first guide receptacle has a width that is smaller than the width of the guide section assigned to it. In contrast, when the actuating arm rests against the stop of the guide, the width of the side opening of the first guide receptacle is at least the width of the first guide section. The width naturally refers in each case to an extension length in the same direction. In the preferred embodiment, the first guide receptacle can thus be opened by widening the side opening of the first guide receptacle starting from the operating state. Because in the assembled state or when the actuating arm rests against the stop of the guide, the width of the side opening is at least the width of the first guide section, preferably greater than this width, the first guide section can be easily removed from the first guide receptacle in this state.

[0011] In one embodiment, the guide comprises a spring device that applies a spring force to the actuating arm relative to the base body along the displacement path away from the stop. In this embodiment, the ability to clip the carriage onto the rail and the reliable retention of the carriage on the rail in the operating state is particularly advantageously ensured. The spring device is provided to counteract displacement of the actuating arm along the displacement path starting from the operating state. This can prevent the carriage from becoming detached from the rail in the operating state. In embodiments in which, starting from the operating state, the actuating arm is movable relative to the carriage body in the displacement direction to open the first guide receptacle, the spring force exerted by the spring on the actuating arm is directed opposite to the displacement direction.The spring device can, for example, comprise a spring element that is supported on a support portion of the slide body, which is preferably formed by the fastening body of the slide body. Preferably, the first guide receptacle is formed by a first receptacle part formed by the actuating arm and a second receptacle part formed by the slide body, wherein the spring element is arranged between, preferably in the direction of displacement between, the support portion and the receptacle part and is held pressed in the direction of displacement between the support portion and a further support portion formed by the first receptacle part. Preferably, the spring element is designed as a spiral spring, the spring axis of which extends in the direction of displacement.Preferably, the spring force exerted by the spring device on the actuating arm in each described state of the carriage is directed towards the receiving axis of the first guide receptacle. In one embodiment, in the operating state, the actuating arm is held pressed against the first guide section by the spring device with the spring force. In one embodiment, the guide has a further stop which defines an end of the displacement path opposite the said end of the displacement path. Preferably, the actuating arm bears against this further stop in the operating state. In an embodiment in which the guide comprises a spring device, the actuating arm is preferably held pressed against the further stop by the spring force in the operating state.When the slide is released from the rail and is in a rest position without external force, the actuating arm can be reliably fixed to the slide body by the spring force holding the actuating arm pressed against the further stop.

[0012] In one embodiment, the slide comprises an actuating lever which is mounted on the slide body so as to be rotatable about a bearing axis. The bearing axis is encompassed by the slide body, in particular by the base body. Preferably, the actuating lever is mounted on the bearing axis of the slide body such that a rotation about the bearing axis is a rotation about a rotation axis whose position relative to the slide body remains unchanged during the rotation. The rotation axis defines the center around which the rotation occurs. The actuating lever and actuating arm of the slide are designed to correspond to one another in such a way that, starting from the operating state, the actuating arm can be displaced by means of the actuating lever about the bearing axis by rotating the actuating lever to enable the explained opening of the guide receptacle.The corresponding design of the actuating lever and actuating arm thus ensures that the described displacement of the actuating arm to enable the described opening of the first guide receptacle can be realized by rotating the actuating lever. Within the scope of the invention, it was found that the provision of such an actuating lever, the position of which is fixed relative to the carriage body by the bearing on the bearing axis of the carriage body, enables a particularly simple and reproducible displacement of the actuating arm, starting from the operating state to reach the assembled state. Preferably, the actuating lever is mounted on the bearing axis in such a way that its position relative to the carriage body is fixed in such a way that, starting from the operating state, it can only be moved relative to the carriage body by rotating about the bearing axis.The actuating lever preferably has an actuating section with which it rests against the actuating arm to realize the displacement of the actuating arm, while it is rotated about the bearing axis of the carriage body for the explained displacement of the actuating arm. The actuating lever preferably rests against the bearing axis of the carriage body via a bearing section, wherein the actuating section is spaced from the bearing section perpendicular to the bearing axis or perpendicular to the rotation axis explained above. The actuating lever is preferably mounted on the bearing axis of the carriage body in such a way that a rotation of the actuating lever about the bearing axis is necessarily accompanied by a movement of the actuating section relative to the carriage body in the above-explained displacement direction.

[0013] In one embodiment, the actuating arm has an actuating contour, and the actuating lever has an actuating section corresponding to the actuating contour. The actuating section can have the properties explained above. By rotating the actuating lever about the bearing axis, the actuating section can be moved along the actuating contour. During the rotation of the actuating lever, by which the displacement of the actuating arm to open the guide receptacle is realized, the actuating section preferably slides along the actuating contour, resting against the latter, in particular while exerting a displacement force on the actuating contour in the displacement direction. When the first guide receptacle is opened for removal of the associated first guide section, the actuating section preferably rests against a first contour section of the actuating contour.Thus, in the assembled state explained above, the actuating section rests against the first contour section of the actuating contour. Particularly preferably, the actuating section rests against the first contour section when the first guide receptacle is open for removal of the associated first guide section or is locked to the first contour section in the assembled state. Alternatively or additionally, another type of locking can also be provided between the actuating lever and the carriage body and / or the actuating arm in the assembled state or when the first guide receptacle is open for removal of the associated first guide section. The locking is designed such that, when the locking is present, rotation of the actuating lever about the bearing axis is only possible when a release force is exceeded, wherein after the release force is exceeded, the actuating lever can be rotated about the bearing axis with a twisting force that is smaller than the release force.The provision of such a locking mechanism has proven to be particularly advantageous since it allows the carriage to remain permanently in its assembled state once it has been brought into the assembled state. The carriage can therefore be clipped onto the rail particularly conveniently, as explained above. After clipping on, the operating state can then be established by applying the release force and removing the locking mechanism, in which the carriage is held so as to be longitudinally displaceable relative to the rail, as explained. In another embodiment, instead of the actuating section being held with the first guide receptacle or the associated first guide section opened as described above,in the assembled state, it is locked to the first contour section with such a locking mechanism that, when the locking mechanism is present, rotation of the actuating lever about the bearing axis is only possible when a release force is exceeded. It is provided that the actuating section, when the first guide receptacle is opened to remove the associated first guide section or in the assembled state, rests against the first contour section in such a way that a restoring force, applied in particular by the spring device explained here, acts from the actuating arm onto the actuating section. The restoring force is exerted on the actuating section in such a way that it reacts to a movement of the actuating section starting from the assembled state or.when the first guide receptacle is opened for removing the associated first guide section, it acts towards reaching the operating state, in particular towards a rotation of the actuating lever opposite to the direction of rotation in which the actuating lever is to be brought from the operating state into the assembled state. This embodiment has the particular advantage that the actuating lever can only be brought from the operating state into the assembled state by an external force acting on it, and only remains in the assembled state if this force is at least partially maintained, so that without the action of an external force, starting from the assembled state or when the first guide receptacle is opened for removing the associated first guide section, it automatically carries out a movement by which the carriage changes to its state which it has in the operating state of the plain bearing. Thus, the state of the carriage, iethe relative arrangement of the components of the slide, which it occupies in the assembled state, is only deliberately maintained by applying the external force required for this purpose. In one embodiment, the actuating contour has a second contour section against which the actuating section bears in the operating state. Particularly preferably, in the operating state, the actuating section is held in contact with the second contour section by being locked to the second contour section, and as explained above with regard to the locking, alternatively or additionally thereto, another locking mechanism can be provided between the actuating lever and the actuating arm and / or the slide body, which can only be released by a release force associated with this locking mechanism, as explained above. Such a locking mechanism can ensure reliable fixing of the actuating lever relative to the actuating arm orrelative to the carriage body in the operating state, whereby reliable function of the plain bearing in the operating state can be ensured. Generally, the second contour section is preferably arranged offset from the first contour section in the displacement direction; in particular, in the operating state, the second contour section is less far away from the first guide section in the displacement direction than the first contour section.

[0014] In one embodiment, the actuating lever has a clamping section, wherein the actuating lever is spaced from the rail in the operating state and, starting from the operating state, is rotatable about the bearing axis to realize a further operating state in which each of the guide sections, as explained for the operating state, is arranged in the guide receptacle assigned to it and is encompassed by it perpendicular to the longitudinal direction, wherein in the further operating state the clamping section of the actuating lever bears against the rail in a press-fit manner.In the further operating state, the rail and carriage can basically be arranged relative to one another as explained for the present operating state, but the further operating state differs from the operating state in that, unlike in the operating state, the actuating lever in the further operating state rests with the clamping section in press contact against the rail, in particular rests against the first guide section of the rail. In the further operating state, sliding of the carriage along the rail in the longitudinal direction is thus inhibited by the press contact of the clamping section on the rail. Thus, in the particularly preferred embodiment explained, a braking effect is generated between the rail and carriage by the contact of the clamping section on the rail. The clamping section is particularly preferably made of plastic.Particularly preferably, the clamping section is made from a plastic which, when it comes into contact with the first guide section of the rail with a contact force, develops a higher frictional resistance than the sliding material from which the sliding element explained in more detail below is made. Particularly preferably, the clamping section is rounded so that the rail is not scratched by the pressing system. Particularly preferably, in the further operating state, the actuating lever is held fixed in a fixed rotational position about the bearing axis relative to the carriage body. This fixed holding in the fixed rotational position can be achieved, for example, by a latching mechanism between the actuating lever and the carriage body, actuating arm or rail, or by a corresponding design of the surfaces of the clamping section and rail with which they rest against one another in the pressing system. The fixed holding orThe fixed rotational position can thus preferably only be released by generating an associated release force which enables rotation of the actuating lever about the bearing axis starting from the further operating state, wherein after leaving the further operating state, i.e. after releasing the said fixed hold or the fixed rotational position, the actuating lever can be rotated about the bearing axis with a twisting force which is less than the associated release force. In one embodiment, starting from the operating state, the further operating state can only be reached by rotating the actuating lever in a defined direction of rotation about the bearing axis, and starting from the further operating state, the operating state can only be reached by rotating the actuating lever against the defined direction of rotation about the bearing axis.In one embodiment, the actuating section of the actuating lever rests against a third contour section of the actuating contour in the further operating state; in another embodiment, the actuating section is spaced from the actuating contour in the further operating state. Generally preferably, the actuating section is either spaced from the third contour section in the further operating state or rests against the third contour section with a contact force that is lower than the pressing force with which the clamping section rests against the rail to generate the pressing contact, wherein the amount of the contact force is preferably less than 50%, in particular less than 20% of the amount of the pressing force. Generally advantageously, the actuating contour has a third contour section, wherein the actuating section is arranged along the third contour section in the further operating state.In the further operating state, the actuating section thus extends exclusively within a section, in particular with respect to the longitudinal direction, over which the third contour section extends, whereas in the operating state the actuating section extends exclusively within a section, in particular with respect to the longitudinal direction, over which the second contour section extends, and wherein the actuating section extends exclusively within a section, in particular with respect to the longitudinal direction, over which the first contour section extends when the first guide receptacle is opened for removal of the associated first guide section or in the assembled state. The first, second and third contour sections are generally preferably arranged offset from one another in the longitudinal direction.Particularly preferably, the second contour section is arranged between the first and the third contour section, in particular arranged in the longitudinal direction between the first and the third contour section.

[0015] In one embodiment, the actuating lever, in the operating state, has one side in a direction perpendicular to the longitudinal direction of the rail. This side of the actuating lever, which faces perpendicular to the longitudinal direction of the rail, has an extension in the longitudinal direction. The bearing axis is preferably arranged eccentrically in relation to this extension length of said side of the actuating lever in the longitudinal direction. This can have the particular advantage that a different state of the plain bearing can be achieved depending on the direction of rotation about the bearing axis. Preferably, the clamping section of the actuating lever is arranged at a longitudinal end of said side of the actuating lever facing the rail. Particularly preferably, the clamping section is formed at a longitudinal end of this side of the actuating lever which, in the operating state, is further away in the longitudinal direction from the bearing axis orthe above-explained axis of rotation and thus the center of rotation than the opposite longitudinal end of this side of the operating lever.

[0016] Generally, the first guide receptacle preferably encloses the first guide section over a larger angular range than the second guide receptacle encloses the second guide section. This can enable easy removal of the second guide section from the second guide receptacle when the first guide section has been removed from the first guide receptacle. Preferably, both angular ranges each extend over at least 170° around the guide axis of the respective guide section. Preferably, the angular range with which the first guide receptacle encloses the first guide section extends over at least 200°, in particular at least 220°, in particular at least 240°.The enclosing can, but does not necessarily have to be, uninterrupted across the angular range, but encompassing is ensured across the angular range so that the guide receptacle forms a movement limitation for the associated guide section across the angular range and the guide receptacle is materially formed at least at the ends of the angular range.

[0017] In one embodiment, the first guide receptacle is formed by a first receptacle part formed by the actuating arm and a second receptacle part formed by the carriage body. Preferably, the first receptacle part runs along a first transverse side of the first guide section and the second receptacle part runs along a second transverse side of the first guide section, wherein the transverse sides each point along the transverse direction, preferably in opposite directions along the transverse direction. Preferably, the first receptacle part runs exclusively on the first transverse side. Generally, the first and second receptacle parts preferably run in the same overlap region on one side of the first guide receptacle. This can ensure particularly good guidance of the actuating arm and carriage body relative to one another.For improved guidance, the first receiving part generally preferably has a first recess in which a longitudinal section of the second receiving part extends, wherein the recess and the longitudinal section preferably lie in the aforementioned overlap region. Preferably, the longitudinal section of the second receiving part is displaceably mounted in the recess of the first receiving part during the aforementioned displacement of the actuating arm relative to the carriage body, sliding against the region of the first receiving part surrounding the recess.

[0018] In one embodiment, a sliding element is arranged in each guide receptacle, forming a sliding section of the guide receptacle against which the respectively assigned guide section bears in sliding contact during longitudinal displacement of the carriage relative to the rail in the operating state. The sliding element can, for example, be designed in the manner of a section of a hollow cylinder, the outer side of which bears against an inner side of the respective guide receptacle and the inner side of which, in the operating state, points towards the assigned guide section and bears against it in a sliding manner. The provision and design of such sliding elements is well known in the art. Such sliding elements are preferably made from a sliding material. A sliding plastic is advantageously used as the sliding material.In this case, this refers to a polymeric material that has a lower coefficient of friction with the surface of the guide section than the material of the slide body. These include, in particular, the thermoplastics polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride, polytetrafluoroethylene, and, among thermosets, phenolic resins. To further reduce friction, these plastics can contain lubricants, particularly fine-particle solid lubricants such as molybdenum disulfide or graphite. Such polymers are also known as tribopolymers. Since friction also reduces wear and abrasion, these products are particularly suitable when high purity is required, such as in the food and semiconductor industries, as well as in biochemical and microbiological applications.The polymeric materials can further contain fillers and fiber materials, for example made of plastic or textile, to improve the mechanical properties. Particularly preferably, the sliding element arranged in the second guide receptacle encloses the second guide section over a larger angular range in the operating state than the sliding element arranged in the first guide receptacle encloses the first guide section. Preferably, the angular range with which the sliding element in the second guide receptacle encloses the second guide section is at least 140°, in particular at least 160°, whereas the angular range with which the sliding element in the first guide receptacle encloses the first guide section is less than 160°, in particular less than 140°.Particularly preferably, the sliding element arranged in the first guide receptacle is fixed exclusively to the second receptacle part formed by the carriage body and preferably also extends exclusively along this second receptacle part. Particularly preferably, the first receptacle part, which is formed by the actuating arm, is made of a sliding material. Preferably, the actuating arm as a whole, in particular as an integral one-piece, is made of a sliding material. Particularly preferably, in the operating state, the actuating arm with the first receptacle part directly adjoins the first guide section, whereas the sliding element is arranged between the second receptacle part and the first guide section. Preferably, the first receptacle part has a contour on its side facing the first guide section that corresponds to the outer contour of the first guide section facing it.

[0019] In one embodiment, the first receiving part and the second receiving part differ by less than 50% of their longitudinal extent, with the specification "50%" referring to the longitudinal extent of the second receiving part. This ensures uniform guidance of the first guide section in the first guide receptacle. Preferably, the longitudinal extent of the first guide receptacle, which is formed by the longitudinal extent resulting from the two receiving parts, differs from the longitudinal extent of the second guide receptacle by less than 50%, with the specification "50%" referring to the longitudinal extent of the first guide receptacle. Preferably, the difference between the respective longitudinal extents is less than 30%, in particular less than 20% of the respective longitudinal extent to which reference is made.

[0020] In one embodiment, a transverse recess opens into at least one of the guide receptacles, wherein the sliding element arranged in the guide receptacle extends into the transverse recess, thereby defining a position of the sliding element relative to the carriage body. The transverse recess is thus a recess provided on an inner side of the guide receptacle facing the guide section in the operating state, and thus a recess compared to the sections of the respective guide receptacle surrounding it. Because the sliding element arranged in the guide receptacle extends into the transverse recess, it is possible to ensure that the sliding element is fixed in any direction in the guide receptacle, namely both in the longitudinal direction and in a direction perpendicular to the longitudinal direction.The sliding element is preferably designed to be elastically deformable, wherein it can only be inserted into and removed from the guide receptacle by elastic deformation and, in the explained operating state and assembled state of the plain bearing, is arranged with a projection engaging in the transverse recess. Generally, the sliding element preferably has ribs running along the longitudinal direction, which form the sliding section of the sliding element, with which the sliding element bears in sliding engagement against the associated guide section in the operating state. Channels running in the longitudinal direction can be formed between the ribs. The provision of the ribs can ensure a particularly advantageous, low-friction contact of the sliding element with the guide section, which avoids the influence of contamination.

[0021] Generally preferably, the rail is made of a metal, for example as an extruded profile, for example of aluminum. Generally preferably, the carriage is made at least partially of a metal, in particular of aluminum, and / or of a plastic. In one embodiment, at least the base body of the carriage body, in particular the base body and the fastening body of the carriage body, in particular the entire carriage body, is made of a plastic or of a metal, in particular aluminum. In one embodiment, the actuating arm is made of a metal, in particular aluminum, or plastic. Particularly preferably, the base body of the carriage body, in particular the entire carriage body, and the actuating arm are made of the same material. In one embodiment, the actuating lever is made of a metal, in particular aluminum, or plastic.In one embodiment, the base body of the slide body, in particular the entire slide body, the actuating arm and the actuating lever are made of the same material.

[0022] The invention further relates to a carriage for a plain bearing assembly according to the invention. The carriage has a first and a second guide receptacle, each of which is longitudinally elongated and extends adjacent to one another. Each of these guide receptacles is designed to encompass a guide section of a rail associated with it, thereby securing the carriage to the rail in a longitudinally displaceable manner. The carriage has a carriage body and an actuating arm, which together form a first of the guide receptacles.The actuating arm is fixed to the carriage body so as to be displaceable perpendicular to the longitudinal direction to enable opening of the first guide receptacle by displacing the actuating arm to remove the associated first guide section from the first guide receptacle and / or to insert the associated first guide section into the first guide receptacle along a removal direction running perpendicular to the longitudinal direction.

[0023] The invention further relates to the use of a plain bearing according to the invention. When used according to the invention, the carriage is fastened on the rail so as to be longitudinally displaceable by first arranging the second guide section of the rail in the second guide receptacle of the carriage and then arranging the first guide section of the rail in the first guide receptacle of the carriage. The guide sections are each inserted perpendicular to the longitudinal direction into their respective associated guide receptacles and the actuating arm of the carriage is moved from a rest position in a displacement direction perpendicular to the longitudinal direction, the first guide receptacle being opened so wide that the first guide section of the rail can be inserted into the first guide receptacle perpendicular to the longitudinal direction.After arranging both guide sections in the guide holder assigned to them, the actuating arm is moved against the direction of displacement while fixing the carriage relative to the rail perpendicular to the longitudinal direction.

[0024] The plain bearing according to the invention, the carriage according to the invention, and the use according to the invention can each have features that are explained in connection with generic plain bearings. Furthermore, various embodiments of the invention can each have features that are explained in connection with other embodiments of the invention.

[0025] The invention is explained in more detail below with reference to three figures using an exemplary embodiment.

[0026] They show: Figure 1: in schematic principle representations, an embodiment of a plain bearing according to the invention in different states; Figure 2: in various schematic principle representations, views of the embodiment according to Figure 1 in operating condition; Figure 3: in various schematic diagrams, different views of the embodiment according to Figure 1 in the assembled state; Figure 4: in various schematic principle representations, a further embodiment of a plain bearing according to the invention in various states; Figure 5: in various schematic principle representations, various views of various components of the embodiment according to Figure 4 . In Figure 1, the Figures 1a, 1b, 1c and 1d is a

[0027] Embodiment of a plain bearing 1 according to the invention is shown in different states. The plain bearing 1 comprises a rail 2 and a carriage 3.The rail 2 comprises two guide sections 21, 22 extending in a longitudinal direction X, each of which is cylindrical in shape. Figure 1 The guide axes of the guide sections 21, 22 are indicated by crosses. The two guide sections 21, 22 run in a transverse direction Y, which is perpendicular to the longitudinal direction X, next to each other and are spaced from each other in the transverse direction Y. The transverse direction Y is in Figure 1d from Figure 1 marked, since in Figure 1dthe operating state of the plain bearing 1 is shown, in which the carriage 3 is held in a fixed position relative to the rail 2 perpendicular to the longitudinal direction X and thus also relative to the transverse direction Y, so that the transverse direction Y is equally fixed for rail 2 and carriage 3. The carriage 3 has a first guide receptacle 31, which is designed to correspond to the first guide section 21 of the rail 2, and a second guide receptacle 32, which is designed to correspond to a second guide section 22 of the rail 2. The guide receptacles 31, 32 are each designed in the manner of a hollow cylinder, which in its cylinder jacket Figure 1 for each of the guide receptacles 31, 32. The web sections of the rail 2 extend through this side opening, as shown in Figure 1dshown, in the operating state, through which the guide sections 21, 22 are connected to the rail body of the rail 2. The carriage 3 has a carriage body which comprises a base body 34 and a fastening body 35. As can be seen in particular from the Figures 2 and 3 As can be seen, the fastening body 35 is fastened to the base body 34 by screws 36. The base body 34 and the fastening body 35 together form a guide for the actuating arm 5, which has an actuating handle 51 projecting beyond the slide body in every state of the slide bearing 1 and a first receiving part 54. The first receiving part 54 forms part of the first guide receptacle 31. The guide receptacle 31 is also formed by a second receiving part, which is formed by the base body 34 of the slide body. The actuating arm 5 is in this case formed in one piece and made of a sliding material. In the Figure 1dIn the operating state shown, the actuating arm 5 with the first receiving part 54 directly adjoins the first guide section 21 of the rail 2, whereas a first sliding element 41 is provided between the second receiving part, which is formed by the base body 34, and the first guide section 21. Accordingly, a second sliding element 42 is provided between the second guide receptacle 32 and the second guide section 22. In the operating state shown in Figure 1d In the operating state shown, the carriage 3 is thus guided on the rail 2 in a low-friction manner in the longitudinal direction X, while it is held in a fixed position thereon perpendicular to the longitudinal direction X. This is contributed to by the fact that the guide sections 21, 22 can only bear against the walls of the guide receptacles 31, 32 that delimit them via a sliding material and can thus slide along them with low friction.

[0028] From the sequence of Figures 1aThe functioning of the described embodiment of the sliding bearing according to the invention is clearly visible in Figure 1d. The actuating arm 5 is mounted displaceably relative to the carriage body along a displacement direction. It can be moved between a first stop, at which it Figure 1c and a second stop, which is in Figure 1c is shown, but he is in the Figures 1a, 1b and 1d rests, move along the displacement direction relative to the carriage body. The stops are formed by the carriage body. The first-mentioned stop is formed by the fastening body 35 and the further stop 33 by the base body 34, which is generally advantageous according to the invention. Figure 1dIn the operating state shown, the actuating arm 5 rests against the further stop 33 and is held pressed against this stop 33 by the spring device 52, which acts on it along the direction of displacement. In this operating state, the carriage 3 cannot be removed from the rail 2 perpendicular to the longitudinal direction X. However, the actuating arm 5 can be moved along the direction of displacement relative to the carriage body until it rests against the other stop 33, as in Figure 1c shown, whereby the first guide receptacle 31 is opened so far that the first guide section 21 can be moved out of it by the carriage 2, as can be seen from the overview of the Figures 1c and 1b can be seen, is rotated around the guide axis of the second guide section 22. Subsequently, the carriage 3, as can be seen from the overview of the Figures 1b and 1a visible, can be removed from the rail 2 by removing the second guide section 22 from the second guide receptacle 32.

[0029] In Figure 2 comprehensively the Figures 2, 2b, 2c and 2d are different views of the embodiment of the plain bearing 1 according to Figure 1 shown in operating condition. The Figures 2a and 2b show top views of the plain bearing 1 from different directions. Figure 2c shows the section A - A, as in Figure 2a marked, and Figure 2d an enlargement of this section. Figure 2It can be seen that a transverse recess 37 opens into the first guide receptacle 31, which is provided in the base body 34 and which, as is generally advantageous according to the invention, is designed as a bore. The first sliding element 41 engages in this transverse recess 37 with projections 410, whereby the sliding element 41 is held in a fixed position on the base body 34 both along the longitudinal direction X and perpendicular to the longitudinal direction X. Furthermore, it can be seen that the first sliding element 41 has ribs running in the longitudinal direction X, between which channels are formed.The first receiving part 54 formed by the actuating arm 5, which is manufactured integrally with the actuating handle 51, is held pressed against the further stop 33 by the spring device 52 in the operating state and at the same time lies almost against the first guide section 21; according to the invention, it is generally preferably spaced from the first guide section 21 by less than 0.1 mm in the operating state.

[0030] In Figure 3 comprehensively the Figures 3a, 3b, 3c and 3d is the embodiment according to Figure 1 shown in the assembled state, with the views of the Figures 3a, 3b, 3c and 3d the views of the Figures 2a, 2b, 2c and 2d From the comparison between the Figures 2 and 3It can be seen that, starting from the operating state, the actuating arm 5 is moved along the displacement direction relative to the carriage body to reach the assembly state, whereby it is pressed against the stop formed by the base body 35. This displacement movement is only possible by overcoming the spring force applied by the spring device 52. In the assembly state, the first guide receptacle 31 is opened so wide that the first guide section 21, as shown in Figure 1 explained, can be taken from it.

[0031] In Figure 4 comprehensively the Figures 4a, 4b and 4c In various schematic diagrams, views of a further embodiment of a plain bearing 1 according to the invention are shown in different states. In Figure 4a The plain bearing 1 is shown in the operating state, in Figure 4b in another operating state and in Figure 4c in assembled state. In Figure 5comprehensively the Figures 5a , 5b and 5c are to illustrate the properties of the plain bearing 1 according to Figure 4 In various schematic diagrams, different views of the plain bearing 1 or of the components of the plain bearing 1 are shown. The following are intended to explain the Figures 4 and 5 shown embodiment the Figures 4 and 5 explained together.

[0032] The plain bearing 1 according to the Figures 4 and 5 comprises a rail 2 which is essentially analogous to the rail 2 of the embodiment according to Figure 1 The carriage 3 has a carriage body which comprises a base body 34 and a fastening body 35, wherein in the present case the fastening body 35 is formed in two parts and thus comprises two parts which are spaced apart from one another in the longitudinal direction X. The fastening body 35, ieAll its parts are attached to the base body 34 by screws. The slide 3 further comprises an actuating arm 5, which is held captively by the fastening body 35 on the base body 34. A guide is provided between the actuating arm 5 and the slide body, by means of which the actuating arm 5 is fixed to the slide body in a displaceable manner over a displacement path extending in the transverse direction Y. The guide is formed by a first guide part of the slide body, which is formed jointly by the base body 34 and the fastening body 35 of the slide body, and by a second guide part of the actuating arm 5. The design of the guide is particularly evident from the combination of Figures 5a , 5b and 5c While in Figure 5a The plain bearing 1 is shown in its entirety, Figure 5b the plain bearing 1 compared to Figure 5awithout the fastening body 35, while in Figure 5cthe actuating arm 5 is shown alone. From the combined view of these figures, it can be seen that the actuating arm 5 forms grooves as a second guide part of the guide, into which the parts of the fastening body 35 engage as springs, wherein the actuating arm 5 is fixed in its position in the longitudinal direction X by the engagement of the springs in the grooves and is fixed in its position in a direction perpendicular to the longitudinal direction X and the transverse direction Y by the interaction of the base body 34 and the fastening body 35 and is mounted so as to be displaceable in the transverse direction Y relative to the carriage body. The guide forms a stop and a further stop, which form the two ends of the displacement path over which the actuating arm 5 is movable in the transverse direction Y relative to the carriage body in the displacement direction, ie in the present case in the transverse direction Y. In the Figure 4cIn the assembly state shown, the actuating arm 5 rests against the stop of the guide in which Figure 4a In the operating state shown, the actuating arm 5 rests against the further stop of the guide. In this case, the engagement occurs indirectly via the actuating lever 55, which is also encompassed by the slide 3.

[0033] The operating lever 55, which the carriage 3 of the Figures 4 and 5 shown embodiment of a plain bearing 1, is mounted on a bearing axis 38 of the carriage body so as to be rotatable about the bearing axis 38. Both in Figure 4a operating state shown as well as in Figure 4b shown further operating state as well as in Figure 4cIn the assembled state shown, the actuating lever 55 is movable relative to the carriage body exclusively by rotation about the bearing axis 38 and is otherwise fixed relative to the carriage body, which is generally advantageous according to the invention. The actuating lever 55 has an actuating section 551, and the actuating arm 5 has an actuating contour with contour sections 501, 502, 503. In the Figure 4a In the operating state shown, the actuating lever 55 is spaced from the rail 2. The actuating lever 55 has a side that points in the transverse direction Y to the first guide section 21 of the rail 2. As can be seen from the synopsis of the Figures 4a, 4b and 4cAs can be seen, this side of the actuating lever 55 has an extension length in the longitudinal direction X, wherein the bearing axis 38 is arranged eccentrically within the extension length with respect to the longitudinal direction X. One longitudinal end of this side forms a clamping section 552 of the actuating lever 55.

[0034] Thus, the operating lever 55 can perform various functions: In the Figure 4a In the operating state shown, the actuating lever 55 is held fixed with its actuating section 551 locked to the second contour section 502 of the actuating contour of the actuating arm 5. Starting from the operating state, the actuating lever 55 can be rotated in a first direction about the bearing axis 38 to realize the Figure 4b shown further operating state. In Figure 4bAs indicated schematically, the actuating lever 55 has an oversize on its side facing the rail 2 at the longitudinal end that forms the clamping section 552, so that the clamping section 552 is held in the further operating state with a pressing force acting in the transverse direction Y in pressing contact against the first guide section 21 of the rail 2. This pressing force is built up between the bearing axis 38 of the carriage 3 and the first guide section 21 of the rail 2 by the actuating lever 55, which is generally advantageous according to the invention. In this further operating state, the pressing contact of the clamping section 552 inhibits a relative movement between the carriage 3 and the rail 2 in the longitudinal direction. X.Thus, in the further operating state, the carriage 3 can be fixed in position to the rail 2 in every respect, which is generally advantageous according to the invention. This thus fixed position of the carriage 3 relative to the rail 2 can be determined based on the Figure 4b shown further operating state can only be changed if the operating lever is rotated back around the bearing axis 38 in such a direction in which it is to be rotated starting from the further operating state to reach the operating state, or by generating a very considerable relative force between the carriage 3 and the rail 2 in the longitudinal direction, which is not usually provided for. On the other hand, the operating lever 55 can be used to Figure 4a operating state shown in Figure 4c shown assembly state by starting from the one shown in Figure 4ashown operating state is rotated around the bearing axis 38 in the opposite direction, ie opposite to the rotation required to achieve the next operating state. During such a rotation, the actuating section 551 slides along the actuating contour of the actuating arm 5, whereby a relative force is generated between the carriage body and the actuating arm 5 in the transverse direction Y, by which the actuating arm 5 is displaced relative to the carriage body in the transverse direction Y until the Figure 4cshown assembly state is reached. In this assembly state, the actuating arm 5 rests against a stop formed by the guide, and the actuating section 551 is held on a first contour section 501 on this contour section 501, wherein the first contour section 501 exerts a restoring force on the actuating section 551 and thus on the actuating lever 55 due to the spring device 52. Thus, the assembly state according to Figure 4c realized in such a way that it can only be maintained by applying an external force to the actuating lever 55, whereby upon removal of this external force by the action of the spring device 52 while rotating the actuating lever 55 about the bearing axis 38, starting from the assembled state, the operating state according to Figure 4a can be achieved, which is generally advantageous according to the invention. List of reference symbols

[0035] 1 Plain bearing 2 Rail 3 Slide 5 Actuating arm 21 Guide section 22 Guide section 31 First guide receptacle 32 Second guide receptacle 33 Stop 34 Base body 35 Fastening body 36 Screw 37 First transverse recess 38 Bearing axis 41 First sliding element 42 Second sliding element 51 Operating handle 52 Spring device 54 First receptacle part 55 Operating lever 410 Projection 501 Contour section 502 Contour section 503 Contour section 551 Actuating section 552 Clamping section XLongitudinal direction YTransverse direction

Claims

1. Carriage (3) for a sliding bearing (1), wherein the carriage (3) has a first and a second guide seat (31, 32) that are each elongated in the longitudinal direction (X) and extend next to one another and which are each designed to receive, in an operating state, a guide portion (21, 22) of a rail (2) respectively assigned to them while surrounding said guide portion and thereby fixing the carriage (3) to the rail in a longitudinally displaceable manner, characterized in that the carriage (3) has a carriage body and an actuating arm (5) which together form a first one of the guide seats (31, 32), the actuating arm (5) being fixed to the carriage body so as to be guided displaceably with respect thereto perpendicularly to the longitudinal direction (X) in order to enable opening of the first guide seat (31, 32) by displacing the actuating arm (5) for removing the assigned first guide portion (21, 22) from the first guide seat (31, 32) or for introducing the assigned first guide portion (21, 22) into the first guide seat (31, 32) along a removal direction running perpendicular to the longitudinal direction (X), wherein the guide device forms a stop which defines an end of the displacement path, the actuating arm (5) being displaceable relative to the base body (34) along the displacement path, starting from the operating state, until the stop is reached and forming an opening of the first guide seat when abutting against the stop, through which the first guide portion is removeable.

2. Sliding bearing (1) comprising a rail (2) and a carriage (3) according to claim 1, wherein the rail (2) has two guide portions (21, 22) which are elongated in a longitudinal direction (X) and extend next to one another, the rail has a rail body and the guide portions are each connected to the rail body via a web portion , and the guide seats each having a side opening which is continuous in longitudinal direction and through which, in the operating state, the web portions extend, wherein in the operating state each of the guide portions (21, 22) is arranged in the guide seat (31, 32) assigned to it and is surrounded by it perpendicularly to the longitudinal direction (X) while fixing the carriage (3) relative to the rail (2) perpendicularly to the longitudinal axis (X) and while ensuring longitudinal displaceability of the carriage (3) relative to the rail (2).

3. Sliding bearing (1) according to claim 2, characterized in that the carriage body comprises a base body (34) and a fixing body (35) which are detachably fixed to one another, the actuating arm being separable from the carriage body only after the base body (34) and the fixing body (35) have been detached from one another.

4. Sliding bearing (1) according to claims 2 or 3, characterized in that the guide device is formed by the base body (34) and the fixing body (35), wherein in particular the guide device is a linear guide device along a transverse direction (Y) running perpendicular to the longitudinal direction (X).

5. Sliding bearing (1) according to any of claims 2 to 4, characterized in that when the actuating arm (5) abuts against the stop, an opening is formed in the first guide seat (31) through which the first guide portion (21) can be removed, the guide seats (21, 22) and the guide portions (31, 32) being designed to correspond to one another in such a way that the second guide portion (22) can be removed from the second guide seat (32) perpendicular to the longitudinal direction only after the first guide portion (21) has been removed from the first guide seat (31).

6. Sliding bearing (1) according to any of claims 2 to 5, characterized in that the two guide portions (31, 32) each extend along a guide axis respectively assigned to them and extending in the longitudinal direction (X), wherein, when an abutment of the actuating arm (5) against the stop of the guide device is achieved, starting from the operating state, the second guide portion (22) is supported for rotation about its guide axis in the second guide seat (32), and the first guide portion (21) can be removed from the first guide seat (31) by rotation of the carriage (3) about the guide axis of the second guide portion (22).

7. Sliding bearing (1) according to any of claims 2 to 6, characterized in that the rail (2) has a rail body and the guide portions (21, 22) are each connected to the rail body via a web portion, the guide seats (31, 32) each having a side opening which is continuous in the longitudinal direction (X) and through which, in the operating state, the web portions extend to the guide portions (21, 22) arranged in the guide seats (31, 32), wherein the web portions have a smaller width in a direction perpendicular to the longitudinal direction (X) than the guide portions (21, 22), wherein the side opening of the first guide seat (31, 32), in the operating state, has a width smaller than the width of the first guide portion (31) assigned to it, wherein when the actuating arm (5) abuts against the stop of the guide device, the width of the side opening is at least the width of the first guide portion (21).

8. Sliding bearing (1) according to any of claims 2 to 7, characterized in that the guide device comprises a spring device (52) which acts on the actuating arm (5) relative to the base body (34) with a spring force directed away from the stop along the displacement path.

9. Sliding bearing (1) according to any of claims 2 to 8, characterized in that the guide device has a further stop (33) which defines an end of the displacement path opposite the said end.

10. Sliding bearing (1) according to any one of the claims 2 to 9, characterized in that the carriage (3) comprises an actuating lever (55) supported on the carriage body for rotation about a bearing axis (38), wherein the actuating arm (5) can be displaced by means of the actuating lever (55), starting from the operating state, by rotating the actuating lever (55) about the bearing axis (38) for enabling opening of the guide seat (31, 32).

11. Sliding bearing (1) according to claim 10, characterized in that the actuating arm (5) has an actuating contour and the actuating lever (55) has an actuating portion (551) corresponding to the actuating contour, the actuating portion (551) being movable along the actuating contour by rotating the actuating lever (55) about the bearing axis (38), the actuating portion (551) abutting against a first contour portion (501) of the actuating contour when the first guide seat (31, 32) is opened to remove the associated first guide portion (21, 22), wherein in particular the actuating contour has a second contour portion (502) the actuating portion (551) abuts against in the operating state, in particular abuts against said second contour portion (502) latched to the same.

12. Sliding bearing according to any of claims 10 to11, characterized in that the actuating lever (55) has a clamping portion (552), the actuating lever being spaced from the rail (2) in the operating state and, starting from the operating state, being rotatable about the bearing axis (38) while achieving the further operating state in which each of the guide portions (21, 22) is arranged in the guide seat (31, 32) assigned to it and is surrounded by it perpendicularly to the longitudinal direction (X), and the clamping portion (552) of the actuating lever (55) abuts against the rail (2) in pressing contact, wherein in particular, in the further operating state, the actuating lever (55) is held fixed in a fixed rotational position about the bearing axis (38) relative to the carriage body, and / or that in the operating state, the actuating lever (55) faces the rail (2) with one side perpendicular to the longitudinal direction (X), this side of the actuating lever (55) having an extension length in the longitudinal direction (X) and the bearing axis (38) being arranged eccentrically with respect to this extension length in the longitudinal direction (X).

13. Sliding bearing according to the claims 11 and 12, characterized in that the actuating contour in addition to the second contour portion (502) has a third contour portion (503), the actuating portion (551) being arranged along the third contour portion (503) in the further operating state, in particular the second contour portion (502) being arranged between the first and third contour portions (501, 503).

14. Sliding bearing (1) according to any one of claims 2 to13, characterized in that the first guide seat (31) surrounds the first guide portion (21) over a larger angular range than the second guide seat (32) surrounds the second guide portion (22).

15. Sliding bearing (1) according to any one of claims 2 to14, characterized in that the first guide seat (31) is formed by a first receiving part (54) formed by the actuating arm (5) and a second receiving part formed by the carriage body, wherein in particular the first receiving part (54) extends on a first transverse side of the first guide portion (21) and the second receiving part extends on a second transverse side of the first guide portion (21) and / or wherein the first receiving part (54) has a recess in which a longitudinal portion of the second receiving part extends, wherein in particular the first receiving part (54) and the second receiving part differ by less than 50 % in their longitudinal extent, wherein reference being made to the longitudinal extent of the second receiving part.

16. Sliding bearing (1) according to any one of claims 2 to 15, characterized in that a respective sliding element (41, 42) is arranged in each guide seat (31, 32), which sliding element forms a sliding portion of the guide seat (31, 32), against which sliding portion the respectively assigned guide portion (21, 22) abuts in a sliding manner in the operating state during a longitudinal displacement of the carriage (3) relative to the rail (2).

17. Sliding bearing (1) according to claims 15 and 16, characterized in that in the first guide seat (31), the sliding element (41) is arranged exclusively on the second receiving part, wherein in particular the first receiving part (54), especially the actuating arm (5) as a whole, is made of a sliding material.

18. Sliding bearing (1) according to any of claims 16 to 17, characterized in that a transverse recess (37) opens into at least one of the guide seats (31, 32), the sliding element (41, 42) arranged in the guide seat (31, 32) extending into the transverse recess (37) while fixing a position of the sliding element (41, 42) relative to the carriage body, in particular the sliding element (41, 42) having ribs extending along the longitudinal direction, which ribs form the sliding portion of the sliding element (41, 42).

19. Use of a sliding bearing (1) according to any of claims 2 to 18, characterized in that the carriage (3) is mounted on the rail (2) in a longitudinally displaceable manner by first arranging the second guide portion (22) of the rail (2) in the second guide seat (32) of the carriage (3) and then arranging the first guide portion (21) of the rail (2) in the first guide seat (31) of the carriage (3), the guide portions (21, 22) each being inserted into the guide seat (31, 32) respectively assigned to them perpendicular to the longitudinal direction (X), and the actuating arm (5) of the carriage (3) being moved in a displacement direction running perpendicularly to the longitudinal direction, starting from a rest position, while opening the first guide seat (31) to such an extent that the first guide portion (21) of the rail (2) can be inserted into the first guide seat (31) perpendicularly to the longitudinal direction, wherein, after both guide portions (21, 22) have been arranged in the guide seat (31, 32) respectively assigned to them, the actuating arm (5) is moved counter to the displacement direction while fixing the carriage (3) relative to the rail (2) perpendicularly to the longitudinal direction (X).