Lastgesteuertes Hybridlager

Abstract

Bearing (1) for longitudinally displaceable support of a guide section (9) of a rail extending longitudinally (LN) with its cylinder axis, wherein the bearing (1) comprises a housing (2) with a longitudinally (LN) extending passage (6) in which the guide section (9) of the rail is arranged in an operating state of the bearing (1), and wherein a receptacle for bearing against the guide section (9) of the rail in a load direction (LS) perpendicular to the longitudinal direction (LN) is formed in the passage (6) in the operating state, wherein the housing (2) comprises a first housing part (3) and a second housing part (4) and at least one bearing means (7) with a bearing surface (7.1) is provided on the first housing part (3) and at least one running surface (8) is provided on the second housing part (4) offset longitudinally (LN) to the bearing surface (7.1) of the bearing means (7).1) having a roller (8) rotatably mounted about a roller axis (8.2) extending perpendicular to the longitudinal direction (LN), characterized in that the running surface (8.1) and the contact surface (7.1) each form a different part of the receptacle and that the two housing parts (3, 4) are resiliently displaceable relative to each other by means of a spring device (5) in order to change the mounting position of the running surface (8.1) relative to the contact surface (7.1) along the load direction (LS).

Description

[0001] The invention relates to a bearing according to the preamble of claim 1, as well as a bearing arrangement with such a bearing, the use of such a bearing and a sliding element for use as a support means in such a bearing.

[0002] Bearings of this type are used in linear guides for sliding support along a longitudinal direction, typically for the sliding support of work devices. Various bearings are known that can ensure sliding and / or rolling support of a work device. Depending on the expected load of the work device and the expected load direction, a wide variety of bearings are used. For example, bearings are known in which roller bearings, ball bearings, or sliding elements are used for support, by means of which the load is supported against a rail so that low-friction movement of the work device along the rail is possible. In particular, bearings based on a hybrid technology are also known, meaning that the support is both rolling and sliding. Such bearings have a housing and a receiving channel extending longitudinally through the housing.a through-hole. When the bearing is used as intended, the receiving channel serves to accommodate a guide section of a rail, designed in the manner of a cylinder, on which the bearing is mounted so as to be longitudinally displaceable. For this purpose, the bearing has at least one roller with a running surface, with which it bears against the guide section in an operating state. Furthermore, the bearing has at least one contact element, which is designed as a sliding element in the longitudinal direction at least along a sliding section. The contact element surrounds the guide section perpendicular to the longitudinal direction over an angular range of more than 200°, in particular more than 220°. In conventional hybrid bearings, when used as intended, a working device is arranged on the bearing such that the roller transmits the main load to the guide section and rolls along the guide section when the bearing is displaced longitudinally relative to it.The roller can thus essentially absorb forces in one main load direction. The sliding section of the support element is arranged longitudinally offset from the roller, so that the guide section is pressed against the sliding section when a transverse force acts perpendicular to both the longitudinal direction and the main load direction. The guide section is thus laterally stabilized by the support element, allowing the support element and guide section to slide along each other simultaneously. Hybrid bearings of this type are particularly suitable for work devices that are moved manually in the longitudinal direction, for example in camera technology, machine tool doors, or panels, because, due to the hybrid technology, such bearings can carry and move large loads along a rail with very little friction.Secondly, transverse forces occurring during manual displacement, in particular, can be dissipated by the support device, so that the working device attached to the bearing can be moved along the rail without significant noise and without significant friction.

[0003] However, with bearings of this type, it has generally proven difficult to adjust the bearing and its properties to suit expected loads and desired sliding and rolling characteristics. Particularly in bearings subjected to highly fluctuating loads, it is essential that the bearing exhibits the desired sliding and rolling characteristics under all expected loads. Furthermore, the components used in the bearing must withstand the expected loads with minimal damage while maintaining the desired bearing properties. Depending on the application, these requirements often result in a complex and / or costly bearing design.

[0004] The present invention is based on the objective of providing a bearing and / or a bearing arrangement and / or a use of a bearing and / or a sliding element which eliminates at least one disadvantage of generic bearings or bearing arrangements or sliding elements.

[0005] As a solution to the problem underlying the present invention, the invention proposes a bearing with the features according to claim 1. The bearing according to the invention is suitable for longitudinally displaceable support of a guide section of a rail, the guide section of which extends longitudinally with its cylinder axis. For this purpose, the bearing comprises a housing with a longitudinally extending passage. In an operating state of the bearing in which the bearing is used according to its intended purpose, the guide section is arranged in the passage. A receptacle is provided in the passage, which is designed, at least for contact with the guide section of the rail in a load direction perpendicular to the longitudinal direction.Preferably, the bushing also has an opening extending continuously along its longitudinal extent, which, in the operating state, is penetrated by a web of the rail, such that the guide section can be moved through the bushing while being held by the web. For example, the web can connect the guide section to a rail body. The bushing can be designed in the form of a hollow cylinder, the cylinder axis of which corresponds to a bearing axis of the bearing, wherein the hollow cylinder wall is formed by the housing and, in particular, can have at least one interruption, for example, the opening can be provided as an interruption in the hollow cylinder wall. Because the bushing extends continuously through the housing in the longitudinal direction and the guide section can be moved through it, the bearing and guide section can be displaced relative to each other in the operating state.Preferably, the longitudinal length of the guide section is at least five times, and in particular at least ten times, the longitudinal length of the housing and / or the feedthrough. Preferably, the feedthrough is closed perpendicular to the longitudinal direction in at least one section, and preferably in at least two sections, over an angular range of at least 200°, in particular at least 220°, in particular at least 240°, and in particular at least 260°. In a hollow cylindrical design of the feedthrough, the hollow cylinder wall thus extends within each section over its entire longitudinal extent at each longitudinal position over a corresponding angular range around a longitudinally extending bearing axis of the bearing.In particular, the penetration is closed in the area of ​​a recess provided between two such sections, perpendicular to the longitudinal direction, over an angular range of at least 120°, in particular at least 140°, in particular at least 160°, and in particular at least 180°. In particular, the enclosing section, or the sum of all enclosing sections, extends longitudinally over at least 40%, in particular at least 50%, and in particular at least 55% of the longitudinal length of the penetration. If several enclosing sections are provided, they are spaced apart from each other, in particular longitudinally, by a recess as described above.

[0006] Furthermore, the housing comprises at least a first housing part and a second housing part. At least one contact element with a contact surface is provided on the first housing part. The contact surface is designed to bear against the guide section of the rail in the load direction during operation, whereby the contact surface may or may not bear against the guide section, particularly depending on the forces acting in the load direction during operation. Preferably, the contact element is mounted in one and / or more of the described sections of the bushing that enclose the longitudinally extending bearing axis over an angular range.In particular, the design includes at least one longitudinally extending sliding area, spaced from the bearing surface in the load direction, which, during operation, is permanently in contact with at least a portion of the guide section or when a transverse force acts on the bearing and / or the guide section. Specifically, the sliding area is designed to slide along the guide section when the bearing and guide section are displaced relative to each other. Preferably, the at least one sliding area is provided on the bearing element, and in particular, formed on the bearing element itself. Preferably, the bearing surface and the sliding area are formed directly on the bearing element and thus on the same component. Preferably, the bearing surface and / or the sliding area are part of the receptacle provided for bearing against the guide section of the rail.On the second housing part, at least one roller is rotatably mounted about a roller axis perpendicular to the longitudinal and load directions. The roller has a running surface that, in the operating state of the system, serves against the guide section of the rail in the load direction. The roller is rotatably mounted on the second housing part, offset longitudinally from the contact surface, so that, in the operating state, its running surface only contacts the guide section within a longitudinal extension range offset from the contact surface. In particular, the roller is designed to roll along the guide section in the longitudinal direction when the bearing and / or the rail is displaced. Preferably, the roller remains in contact with the guide section in the operating state regardless of any force acting in the load direction.

[0007] In the bearing according to the invention, the running surface and the contact surface, being arranged offset from one another longitudinally, each form a different part of the receptacle. This has the advantage that at least two parts of the receptacle can be mounted differently from one another on the housing. The first housing part and the second housing part are advantageously mounted such that the two housing parts are slidable relative to each other along the load direction. This means that the contact surface and / or the running surface are also slidable relative to each other, so that the position of the running surface relative to the contact surface can be changed along the load direction. Furthermore, at least one spring device is provided by which the first housing part and the second housing part are resiliently slidable relative to each other, in particular by applying a spring force to the first housing part and / or the second housing part, preferably both housing parts.In particular, the housing parts are subjected to spring force in the direction of an initial position and are preferably displaceable into this initial position along the load direction by means of the spring force. The initial position is the position of the two housing parts relative to each other when the bearing is unloaded, i.e., when no external force acts on the bearing. Preferably, the raceway and the contact surface are offset relative to each other along the load direction in the initial position. The displaceable mounting of the two housing parts has the advantage that, in the operating state, the bearing contacts the guide section with a proportion of the raceway and contact surface that depends on the acting load force.For example, when a first load force is present, only either the running surface or the contact surface is in contact with the guide section, whereas when a second load force is present, only the other of the running surface and contact surface, or the running surface and contact surface together, are in contact with the guide section, wherein, in particular, the second load force is greater than the first load force, and, in particular, the first load force is less than a limit force and the second load force is greater than the limit force. In one embodiment, during operation, when the load force is below or equal to a limit force, the bearing is in contact with the guide section only with the running surface. Preferably, during operation, when the load force is above the limit force, the bearing is in contact with the guide section with both the running surface and the contact surface.The limiting force is preferably a load force acting in the load direction, the magnitude of which is selected such that, even when the limiting force is present, failure or damage to at least the roller, the roller axle, the roller axle bearings, and / or the second housing part is prevented with sufficient safety over the intended service life of the bearing. In particular, the limiting force is adjustable by means of the spring mechanism.The bearing according to the invention, due to the slidable mounting of the housing parts in the described embodiment, has the advantage that, under excessively high load forces, i.e., load forces above the limiting force, the bearing can contact the guide section not only with its running surface but also with its contact surface, so that part of the load force is transferred via the contact element and the first housing part. In particular, the contact element can be designed as a sliding element, which keeps the coefficient of friction between the bearing and the guide section low even under high load forces. This prevents an overload acting on the roller and increases the service life of the bearing. Because, below the limiting force, the bearing only contacts the guide section with its running surface, the bearing's service life is further reduced.Given a suitable load force, a friction-minimized and easy relative displacement of the bearing and guide section is advantageously possible. In one embodiment, during operation, at a load force below or equal to a limit force, the bearing contacts the guide section only with its contact surface, and at a load force above the limit force, with both its running surface and its contact surface, or only its running surface, contact the guide section. In such an embodiment, low-friction rolling over the roller can be selectively enabled only when a predefined limit force is exceeded, whereby, for example, in this embodiment, the contact element in combination with the guide section can have a high coefficient of friction.

[0008] In one embodiment, the receptacle has a clear cross-section perpendicular to the longitudinal direction, through which a bearing axis runs in the longitudinal direction. In the bearing's rest state, where a load force below or equal to the limiting force acts, the contact surface is at a different distance from the bearing axis than the running surface. In another embodiment, the contact surface is at a greater distance from the bearing axis in the rest state, which can ensure that, in the rest state, the bearing contacts the guide section with the running surface of the roller, but not with the contact surface. In a bearing load state, where a load force above the limiting force acts, at least one of the contact surface and the running surface, and in particular only one of the contact surface and the running surface, is at a different distance from the bearing axis than in the rest state. In another embodiment, the contact surface is at the same distance from the bearing axis as the running surface in the load state.This allows the bearing, under load, to contact the guide section with both its running surface and its contact surface to relieve the roller. Load state and rest state each describe an operating state of the bearing, but with a different load force. Advantageously, the load force can be varied within a range up to the limit force by adjusting the distance, without the guide section experiencing adverse frictional contact with the contact surface.

[0009] In one embodiment, a recess extending in the load direction is formed in one of the first or second housing parts. In particular, the recess also extends through one of the first or second housing parts in a direction perpendicular to the longitudinal and load directions. At least a section of the other housing part can be guided within the recess by the first or second housing part—that is, by the housing part in which the recess is not formed—to displace the housing parts relative to each other. Preferably, the housing part is guided within the recess in the load direction.In particular, the recess is bounded by a wall region of one of the first or second housing parts, i.e., the housing part in which the recess is formed, wherein the wall region encloses the section of the other housing part guided in the recess on both sides along at least one direction. Preferably, the wall region encloses the section on both sides in a direction perpendicular to the longitudinal direction and the load direction. In particular, one of the first or second housing parts has two arms extending perpendicular to the longitudinal direction and load direction, in particular arms of equal length, which project in opposite directions from a longitudinally extending housing section of one of the housing parts. In particular, one of the housing parts has an X-shaped cross-section perpendicular to the load direction. The recess extends in particular through both arms.

[0010] The recess is generally preferred in the first housing part.

[0011] In one embodiment, the second housing part has, in at least one section, at least two legs spaced apart from each other in a direction perpendicular to the longitudinal direction and the load direction, with the section being formed, in particular, on an inner side of the second housing part. At least a portion of the roller can advantageously be arranged between the legs. Preferably, the roller is mounted between the legs. Preferably, the legs extend in the load direction and are connected by a base, which in particular runs parallel to the longitudinal direction. The legs and the base can be straight or curved. Furthermore, the legs can be of equal or different lengths. It is essential that at least a portion of the roller can be arranged between them, preferably that the roller can be rotatably mounted between them. Generally, preferably, the legs extend straight and parallel to each other.In particular, the second housing part has at least one U-shaped section with two legs in its cross-section perpendicular to the longitudinal direction, wherein the U-shaped section is formed, in particular, on an inner side of the second housing part. In particular, at least a portion of the roller is arranged between the legs of the U-shaped section, and in particular, the roller is supported between the legs. Preferably, the roller axle is supported on the legs of the U-shaped section. Preferably, the second housing part has the described recess, wherein the legs form the recess, or the first housing part has the recess, wherein, in the operating state, the legs are arranged in the recess.

[0012] Preferably, the bearing according to the invention has at least one first contact surface and one second contact surface. The two contact surfaces are arranged, in particular, spaced apart from each other in the longitudinal direction. The features described herein for embodiments with regard to the contact surface can apply to both the first and second contact surfaces. Preferably, the first contact surface is arranged longitudinally in front of the running surface and the second contact surface is arranged longitudinally behind the running surface, so that the running surface is located between the two contact surfaces. With such an arrangement of contact surfaces relative to the running surface, the bearing can rest particularly stably against the guide section of the rail under load forces exceeding the limit force and, if necessary, be moved along it. Furthermore, this ensures that the roller and roller axle are loaded or unloaded evenly, resulting in improved bearing durability.In particular, the first and second contact surfaces are provided on the support element, especially on the same support element, which is particularly a one-piece design. However, if the bearing has more than one support element, the first and second contact surfaces can also be provided on different support elements. In particular, more than two contact surfaces are provided on the receiving element, with the contact surfaces being distributed longitudinally, especially numerically, evenly in front of and behind the running surface. In principle, it is also conceivable, although less preferred, that the first and second contact surfaces are both provided longitudinally in front of or behind the running surface.

[0013] In one embodiment, the bearing has at least one guide element extending in the load direction, wherein the second housing part and / or the first housing part are slidable relative to each other along the at least one guide element. The slidability of the housing parts along the guide element allows the position of the raceway relative to the contact surface to be changed along the load direction. The at least one guide element is, in particular, at least partially designed as a guide pin. More preferably, the bearing has at least two guide elements, wherein the guide elements are arranged, in particular, longitudinally at the same height and spaced apart from each other in a direction perpendicular to the longitudinal and load directions. In one embodiment of the bearing according to the invention, a recess is formed in one of the first or second housing parts, and at least one guide element is provided.In this embodiment, the at least one guide means is preferably arranged at least partially in the recess. In one embodiment, the at least one guide means is attached to one of the first or second housing parts. In particular, the guide means is detachably attached to one of the housing parts, preferably screwed into that housing part. In particular, the guide means has an external thread, at least partially, especially at an end section, which can be screwed into or is screwed into an internal thread formed on one of the housing parts. More generally, the guide means is attached to the first housing part. In particular, the other of the first or second housing part, i.e., the housing part to which the guide means is not attached, has a guide channel, wherein the guide means is preferably arranged partially in the guide channel.If more than one guide means is provided, the number of guide channels preferably corresponds to the number of guide means, with each guide means being at least partially arranged in a separate guide channel. If the bearing has at least two guide means, at least two guide channels are provided, with a first guide means arranged in a first guide channel and a second guide means arranged in a second guide channel. The guide channel is generally preferably formed in the second housing part. The guide channel is particularly preferably designed as a bore. However, depending on the manufacturing process of the bearing and / or its shape, the guide channel can also be formed in other ways, for example by stamping or by producing the housing part using a suitable die-casting process.Preferably, the guide channel extends through the other of the first or second housing part in the load direction, with the guide element passing through the guide channel. Preferably, the guide channel and a lower end of the guide element are configured to correspond to each other such that the other of the first or second housing part is held securely against the other of the first or second housing part. In particular, the guide channel has a clear width in at least one section perpendicular to the load direction that is smaller than an outer dimension of the lower end of the guide element perpendicular to the load direction. Preferably, the guide element has a chin at its lower end that forms a bearing surface, and the guide element can bear against, or does bear against, the other of the first or second housing part with this bearing surface to transmit a force.In particular, the lower end of the guide element is designed in the manner of a screw head.

[0014] In one embodiment, the guide element has a sliding section extending in the load direction. To ensure that the guide element slides along the guide channel when the first and second housing parts are displaced relative to each other, the guide element, particularly with its sliding section, engages at least partially in the guide channel. Preferably, the sliding section has at least one sliding surface formed circumferentially on an outer surface of the guide element in a plane perpendicular to the load direction, particularly over the entire length of the sliding section in the load direction. If a recess is formed in one of the first or second housing parts, the sliding section extends completely through the recess in the load direction. It is also conceivable that the guide element has several sliding sections spaced apart from each other in the load direction.In a further embodiment, at least one sliding element is arranged between the guide channel and the sliding section of the guide element. The sliding element is designed such that the other part of the first or second housing part can slide along the sliding section, and / or the sliding section can slide along the housing part. Preferably, the sliding element rests against the other part of the first or second housing part. In this way, backlash-free and as reliable a guidance as possible of the housing parts during displacement relative to each other can be ensured. In particular, the sliding element extends through the guide channel and preferably completely encloses a guide channel axis of the guide channel that is designed in the load direction.Preferably, the sliding element has a shoulder with a bearing surface, the bearing surface of which rests against the other of the first or second housing part in such a way that it is secured against slipping completely through the guide channel in the load direction. Generally, the sliding element is designed as a sliding sleeve. However, the sliding element can also be designed as a sliding film or have a sliding film. Preferably, the sliding element is made of a tribological polymer. Such a tribological polymer is a polymer optimized with regard to wear and friction reduction. Typically, such a polymer has a base polymer, for example, the thermoplastics polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride, polytetrafluoroethylene, and, in the case of thermosets, phenolic resins.Finely divided solid lubricants, such as molybdenum disulfide or graphite, and / or fillers, such as plastic or textile fibers or particles, are added to this base polymer.

[0015] In one embodiment, at least a section of the spring assembly is guided along the at least one guide means. In particular, the guide fixes the spring assembly in a plane perpendicular to the load direction relative to the guide means and / or the first housing part and / or the second housing part. This advantageously prevents the spring assembly from slipping out of its optimal position when the first and second housing parts are displaced relative to each other and / or when the spring compresses and / or rebounds. Preferably, the guide means extends at least partially, and in particular completely, through the spring assembly in the load direction.Advantageously, the spring device acts with a spring force directly along a guide axis of the guide element that is designed in the load direction, thereby achieving optimal force application to the first housing part and / or second housing part and smooth displacement of the housing parts relative to each other. In particular, the spring device and the guide element are arranged concentrically to each other in a plane perpendicular to the load direction.

[0016] In one embodiment, the spring assembly comprises at least one mechanical spring element. Preferably, the mechanical spring element is a helical spring. The spring element can also be designed as a leaf spring or a disc spring. However, the spring assembly does not necessarily have to include a mechanical spring element. For example, a spring element in a helical, leaf, and / or disc spring embodiment can also be made of a polymer. It is also conceivable that the spring assembly includes a spring element made of natural rubber or synthetic rubber. Likewise, the spring assembly can include a spring element made of a foam, for example, polyurethane foam. Preferably, the spring assembly comprises at least two spring elements, wherein the spring elements are arranged, in particular, at the same height in the longitudinal direction and spaced apart from each other in a direction perpendicular to the longitudinal direction and the load direction.Preferably, the spring element, in particular the mechanical spring element, is designed as a compression spring. In a compression spring configuration, the first housing part and the second housing part can be subjected to a spring force by the spring assembly in the load direction such that they are forced apart in the load direction. Advantageously, starting from an operating state of the bearing in which the bearing is subjected to a load force and the housing parts are deflected relative to each other compared to an initial position, the housing parts can be moved back into their initial position by means of the spring assembly at a load force of zero.

[0017] In one embodiment, at least a part of the spring assembly, in particular an upper end, engages in one of the housing parts, preferably in the first housing part. At least the engaging part of the spring assembly is fixed in a plane perpendicular to the load direction relative to the housing part into which the part engages. Preferably, the engaging part engages longitudinally in the housing part, the housing part having, in particular, a longitudinally extending, and especially circular, recess for this purpose. In one embodiment, the spring assembly has a spring constant of at least 5 N / mm, in particular at least 10 N / mm, in particular at least 15 N / mm, in particular at least 20 N / mm, in particular at least 25 N / mm, and in particular at most 200 N / mm, in particular at most 100 N / mm, in particular at most 80 N / mm, and in particular at most 60 N / mm.The spring constant must be selected depending on the expected loads on the bearing and on the load-bearing capacity of the roller and roller axle.

[0018] In one embodiment, the support element has a wall that defines an interior space. This interior space is preferably designed such that the guide section of the rail can pass through it during operation. In this way, the bearing can be displaced along the longitudinal direction of the guide section during operation. Preferably, the support element rests with an outer surface of its wall, particularly continuously in the longitudinal direction, against a wall of the opening formed in the housing. In particular, the interior space defined by the wall of the support element has, at least partially, a cross-section that is elongated in the load direction, perpendicular to the longitudinal direction. Preferably, the cross-section is oval.Due to its elongated cross-section in the load direction, the guide section of the rail can be stabilized laterally by the support element during operation, particularly in a direction perpendicular to both the longitudinal direction and the load direction, regardless of its position relative to the interior of the support element in the load direction. In particular, it can bear at least partially against the support element. In one embodiment, the wall of the support element has at least one opening. Through this opening, the at least one roller engages at least partially from outside the interior, particularly at least when the load force is below or equal to the limiting force. The portion of the roller engaging the interior depends on the magnitude of the applied load force.At a load force corresponding to the limit force, the roller's running surface may just barely no longer engage with the interior. In one embodiment, its interior-facing side is spaced from the bearing axis by the same distance as the longitudinally adjacent areas of the interior-facing side of the wall. In any case, the roller can engage in such a way that, during operation, its running surface can bear against the guide section, at least when a certain load force is present, and particularly when any possible load force is present. The opening in the wall of the support element can also be designed such that at least two rollers, particularly those arranged longitudinally offset from one another and / or rollers arranged in a direction perpendicular to the longitudinal and load directions, can engage with the interior.Preferably, the opening extends longitudinally only along a portion of the support element. In particular, further openings are formed in the wall of the support element, which also extend longitudinally only along a portion of the support element. The openings can be arranged longitudinally and / or offset from one another in a direction perpendicular to the longitudinal and load directions. Multiple openings are particularly advantageous when the bearing has more than one roller, so that at least one roller engages or can engage in the interior through each additional opening. In one embodiment, the opening in the wall is arranged within an edge of the wall, in particular such that the opening is bounded longitudinally by the wall at a first and a second opening end.It is also conceivable, however, that the opening is formed longitudinally at an edge of the wall, so that the opening is only bounded by the wall at its first or second end. If further openings are present, at least one opening can be located within an edge of the wall and at least one opening can be located at the edge of the wall. Preferably, the opening is aligned longitudinally with the contact surface of the support element. If the support element or the receptacle has at least two contact surfaces, at least one contact surface is arranged longitudinally in front of the opening and at least one contact surface is arranged longitudinally behind the opening. Preferably, the opening and the contact surface(s) each have a longitudinal extension length, wherein the ratio of the extension length of the opening to the extension length of the contact surface is at least 0.5, in particular at least 0.75, and in particular at least 1.0.In particular, the device further has a longitudinal extension length, wherein the opening is preferably formed in the wall at the center of the longitudinal extension length of the device.

[0019] In one embodiment, a different opening is formed in the wall of the support element. This other opening preferably extends continuously along the entire length of the support element in the longitudinal direction. The other opening is preferably designed such that, in the operating state of the bearing, it can be penetrated by a web of a rail connected to the guide section. In one embodiment, the support element has a longitudinally extending support element axis. In particular, the wall of the support element encloses the support element axis in a plane perpendicular to the longitudinal direction with an enclosing angle of at least 220°, more particularly at least 240°, and more particularly at least 260°.In one embodiment, the mounting device has at least one locking element with which the mounting device rests against the first housing part and / or engages in a recess of the first housing part to prevent longitudinal displacement and / or rotation about the mounting device axis in at least one direction of rotation. More preferably, the locking element engages in a recess or rests against the first housing part in a recess and prevents displacement and rotation of the mounting device in at least one direction. The recess can be formed, in particular, in a region of the passage in the first housing part. In particular, the locking element is integrally formed on an outer surface of a wall of the mounting device and is especially designed as a lip.Preferably, the recess in the first housing part is formed longitudinally between two sections, in which the opening is closed perpendicular to the longitudinal direction over an angular range of at least 200°, in particular at least 220°, in particular at least 240°, and in particular at least 260°. In one embodiment, the mounting element has at least one further locking element. The second locking element is, in particular, designed as a lip extending longitudinally, preferably over the entire length of the mounting element and preferably continuously. In particular, the lip projects from an outer surface of the wall of the mounting element. In particular, the locking element rests against the first housing part and / or engages in a recess of the first housing part, at least to prevent rotation of the mounting element about the longitudinal axis in at least one direction.Preferably, the mounting element rests with its lip against the first housing part.

[0020] In one embodiment, at least the contact surface of the support means is designed to allow the bearing to slide along the guide section. Preferably, the entire support means is designed to allow the bearing to slide along the guide section. In particular, the contact surface and / or the sliding area, especially the entire support means, is made of a tribological polymer. In another, alternative embodiment of the bearing according to the invention, at least the contact surface of the support means is designed to decelerate longitudinal movement of the bearing when the guide section is in contact with the contact surface by applying a braking force, in particular such that the bearing comes to a standstill.

[0021] In one embodiment, the housing, in particular the first housing part and / or the second housing part, is made of a metal or a metal alloy, especially by die casting. Preferably, the first housing part and / or the second housing part is made of aluminum or an aluminum alloy. In another embodiment, the first housing part is formed integrally with the contact element, wherein the first housing part, the contact element, and the contact surface are preferably made of the same material. In this embodiment, the first housing part, the contact element, and the contact surface are preferably made of a tribological polymer. Generally preferably, the running surface of the roller has a concave outer contour facing the guide or bearing axis. The concave outer contour allows the roller to bear particularly advantageously against the guide section.In particular, the concave outer contour of the running surface and a convex outer contour of the guide section are designed to correspond to each other such that the running surface with the concave outer contour rests completely against the convex outer contour. Preferably, the outer contour has a cross-section perpendicular to the longitudinal direction, shaped like a segment of a sphere. This is particularly advantageous when the guide section is shaped like a cylinder with a round or oval cross-section. Preferably, the roller has a diameter of 10 mm to 30 mm, more particularly 15 mm to 25 mm. Preferably, the roller is made of a plastic. Preferably, an opening in the roller for bearing the roller is penetrated by the roller axle, wherein the opening of the roller has a sliding plastic, more particularly a tribological polymer, at least on one side facing the roller axle.The roller is preferably made of a low-friction plastic, in particular a tribological polymer. The use of a low-friction plastic has the advantage that the bearing according to the invention can be lubricant-free and therefore require little maintenance. In another embodiment, the roller has a lubricated ball bearing by means of which it is mounted on the roller axle. Preferably, the roller axle is manufactured as a separate element attached to the second housing part. Particularly preferably, the roller axle is made of a metal or a metal alloy. In particular, the roller axle is a pin element. Alternatively, however, it is also conceivable that the roller axle and roller are rigidly connected to each other and that the roller axle is rotatably mounted perpendicular to the longitudinal direction in sliding sections or pockets or in ball bearings of the second housing part.In one embodiment, the bearing has at least two rollers, wherein the rollers are arranged spaced apart from each other, particularly in the longitudinal direction. In another embodiment, the bearing has at least one pair of rollers, wherein the roller axes of the rollers are tilted relative to each other by an angle about the longitudinal direction, so that in the operating state they bear against two circumferential sections of the guide section of the rail that are offset from each other by a corresponding angle about the longitudinal axis.

[0022] The invention further relates to a bearing arrangement comprising a bearing according to the invention and a rail with a guide section designed in the manner of a cylinder. In the bearing arrangement according to the invention, the guide section is arranged in the opening of the bearing housing. In a load operating state of the bearing arrangement, in which the bearing is under load, a load force exceeding the limit force acts between the guide section and the bearing in the load direction. In the load operating state, the guide section rests against the running surface and the contact surface in the load direction and is pressed against the receptacle by the load force. In particular, in the load operating state, the guide section is displaceable relative to the bearing in the longitudinal direction while resting against the running surface and the contact surface.By contacting the guide section with the contact surface and the running surface, the load force acting under load is distributed proportionally between the contact surface and the running surface, and thus, in particular, between the first housing part and the second housing part. The distribution of the load force between the contact surface and the running surface is determined by the spring force of the spring assembly acting on the first housing part and / or the second housing part, depending on the magnitude of the load force. Specifically, the distribution of the load force is determined by the number of spring elements included in the spring assembly and / or by the spring constant of the spring assembly or by the spring elements comprised of the spring assembly. Preferably, a maximum force acting on the running surface in the load direction, particularly at the level of the limiting force, is determined by the spring assembly.Preferably, the remaining load force is introduced into the housing via the contact surface, so that under load, as the load force increases, the proportion of the load force introduced via the contact surface increases and decreases via the running surface, and vice versa in the case of decreasing load force. Preferably, when the load force acts in the longitudinal direction, the guide section rests only against the running surface and is equal to or below the limiting force. Preferably, when the load force changes in a range below the limiting force, the guide section rests against the running surface and is displaceable relative to the contact surface along the load direction. This allows the bearing and guide section to be moved relative to each other easily and with low friction throughout the entire load range below the limiting force. At the same time, wear of the contact element along the contact surface is minimized.In one embodiment, the spring device is designed such that the limiting force is at least 50 N, in particular at least 100 N, in particular at least 200 N, in particular at least 250 N, and in particular less than 1000 N, in particular less than 800 N, in particular less than 700 N, and in particular less than 600 N. The rail preferably comprises a rail body and a web connected to the rail body, which is connected to the guide section and thus connects the guide section to the rail body. The web preferably extends continuously along a longitudinal extent of the rail. The guide section is preferably cylindrical in shape, in particular with a circular or oval cross-section perpendicular to the longitudinal direction, with the web connecting the guide section to the rail body attached to one side of the cylinder.Preferably, the rail comprising rail body, web and guide section is manufactured in one piece, in particular from metal or a metal alloy, for example aluminium, in particular by extrusion.

[0023] The invention further relates to the use of a bearing according to the invention. In this case, a guide section of a rail, particularly designed in the form of a cylinder, is inserted into the opening of the bearing housing, especially by rotating the at least one roller. The guide section is pressed against the receiving area with a load force acting in the load direction. In the use according to the invention, the load force is varied, and by changing the load force, the first housing part and the second housing part are displaced relative to each other along the load direction, changing the ratio of a first partial load force, with which the guide section presses against the running surface, to a second partial load force, with which the guide section presses against the contact surface. Preferably, at a load force below and equal to the limiting force, the guide section is pressed only against the running surface.Preferably, the second partial load force is zero when the load force is below or equal to the limit force, so that the first partial load force is 100% of the load force. Preferably, the guide section is pressed against the running surface and the contact surface when the load force exceeds the limit force. Particularly preferably, when the load force is the next higher than the limit force, it is distributed equally between the running surface and the contact surface.

[0024] The invention further relates to a sliding element for use as a support element in a bearing according to the invention. The sliding element can have all the features mentioned above with regard to the support element and is designed, in particular, for sliding the bearing along the guide section. However, the sliding element is not designed for braking the bearing against the guide section. Preferably, the sliding element is made of a tribological polymer. The sliding element according to the invention comprises a wall that defines an interior space of the sliding element. A first opening is formed in the wall, which can be penetrated by a web section of a guide section or by a web section of a rail connected to the guide section. The first opening extends along the entire longitudinal length of the sliding element.The interior is designed such that the guide section can pass through the interior along the entire length of the sliding element. At least one second opening is formed in the wall of the sliding element according to the invention, through which at least a portion of at least one bearing roller can engage from outside the interior. In particular, the roller can engage in such a way that the running surface can bear against the guide section when the bearing is in operation. The second opening can be designed such that at least two rollers, in particular those arranged offset from each other longitudinally and / or those arranged offset from each other in a direction perpendicular to the longitudinal and load directions, can engage into the interior. In particular, several second openings are formed in the wall, with at least one roller being able to engage into the interior through each second opening.The second opening extends only partially along the wall in the longitudinal direction. Preferably, the second opening is arranged within an edge of the wall, in particular such that the second opening is bounded longitudinally by the wall at a first and a second opening end. However, it is also conceivable that the second opening is formed longitudinally along an edge of the wall, so that the opening is bounded by the wall only at the first or second opening end.

[0025] The various solutions according to the invention can each have features in embodiments that are described here in connection with generic bearings, bearing arrangements, sliding elements and uses, and can each have features that are described here in connection with embodiments of a different solution according to the invention.

[0026] The invention is explained in more detail below with reference to figures and exemplary embodiments.

[0027] They show: Fig. 1: in various schematic principle representations various schematic perspective views of an embodiment of a bearing according to the invention; Fig. 2: in a schematic principle diagram, a sectional view of a front view of an embodiment of the bearing arrangement according to the invention with the bearing according to the invention in the Fig. 1 embodiment shown; Fig. 3: in a schematic principle diagram, a sectional view of a front view of an embodiment of the bearing arrangement according to the invention in the Fig. 2 shown embodiment at different load forces.

[0028] In Fig. 1, encompassing the Fig. 1a and Fig. Figure 1b shows various schematic perspective views of an embodiment of a bearing according to the invention. The bearing arrangement comprises a bearing 1 with a housing 2, wherein the housing 2 comprises a first housing part 3 and a second housing part 4. A load force can act on the bearing 1 in the direction of a load direction LS during operation. Preferably, the first housing part 3 and the second housing part 4 are made of two different components and are mounted such that they are displaceable relative to each other in a load direction LS. For this purpose, the first housing part 3 preferably has a recess 3.1 extending in the longitudinal direction LN and in a direction R perpendicular to the longitudinal direction LN and the load direction LS. The recess 3.1 extends in the direction R through two arms 3.2 projecting from the first housing part 3, as shown in particular in Figure 1b. Fig. 1b is recognizable. Due to the arms 3.2, the first housing part 3 has an x-shaped cross-section in a plane perpendicular to the load direction LS. The second housing part 4 is guided at least partially in the recess 3.1 in the load direction LS. Furthermore, a spring device 5 is provided by which the first housing part 3 and the second housing part 4 are resiliently mounted to be displaceable relative to each other in the longitudinal direction. By means of the spring device 5, the two housing parts 3, 4 are each subjected to a spring force such that they are pressed away from each other along the load direction LS towards an initial position. The in Fig. The bearing 1 shown according to the invention is unloaded, i.e., no load force acts on it, so that the housing parts 3, 4 are in their initial position.

[0029] Housing 2 has a longitudinally extending passage 6 (LN). In the operating state of the bearing, a passage 6 is formed through the opening 6. Fig. 1. Guide section 9 (not shown) of a rail is passed through it. A support element 7 with a wall enclosing an interior space is provided on the first housing part 3, the support element 7 extending through the passage 6. The support element 7 has, as shown in particular in Fig. As can be seen in Figure 1b, a mounting surface 7.1 is attached to the guide section 9 in the operating state in the load direction LS. The wall of the mounting element 7 encloses a mounting axis extending longitudinally LN through the mounting element 7 in a plane perpendicular to the longitudinal direction LN in two sections or mounting surfaces 7.1 spaced apart from each other along the longitudinal direction LN by a second opening 7.3, which is explained in more detail below, each with a continuous enclosing angle of 270°, wherein, generally preferably, the entire longitudinal extent of the mounting element 6 is formed by the longitudinal extents of the sections or mounting surfaces 7.1 and the second opening 7.3. Furthermore, in Fig. Figure 1b shows that the feedthrough 6 has two sections 6.1 spaced apart from each other in the longitudinal direction LN, along which it is closed perpendicular to the longitudinal direction LN over an angular range of 270°. The support means 7 is held in the feedthrough by the sections 6.1. Since the support means 7 is not completely closed in a plane perpendicular to the longitudinal direction LN, it has a first opening 7.2 extending longitudinally in the LN, which is enclosed by a Fig. 1. The guide section 9 can pass completely through the interior of the system element 7 and the feedthrough 6, which is not shown.

[0030] In Fig. Figure 1b further shows that a second opening 7.3 is formed in the wall of the support element 7, through which the support surface 7.1 is interrupted in the longitudinal direction LN, so that it is effectively divided into two support surfaces 7.1, with a first support surface 7.1 in the longitudinal direction LN in front of the second opening 7.3 and a second support surface 7.1 in the longitudinal direction LN behind the second opening 7.3. Through the second opening 7.3, a roller 8 engages at least partially in the interior, offset in the longitudinal direction LN from the support surface 7.1. The roller is rotatably mounted on the second housing part 4 and has a running surface 8.1 for contact with the guide section 9 in the operating state in the load direction LS.

[0031] In Fig. 2 is a schematic sectional view of a front view of an embodiment of the bearing arrangement according to the invention with the bearing 1 according to the invention. Fig. The embodiment shown in Figure 1 is illustrated. Fig. As can be seen in Figure 2, a guide section 9 of a rail is guided longitudinally LN through the opening 6 and the interior of the system element 7, the guide section 9 being connected to a web 10 which extends through the first opening 7.2. The web is in turn connected to a rail body 11. Fig. Figure 2 also shows that the roller 8 is rotatably mounted on the second housing part 4 by means of a roller axle 8.2. For this purpose, the second housing part 4 has a U-shaped section with two legs 12.1, 12.2, wherein the legs 12.1, 12.2 extend straight and parallel to each other in the load direction LS and are connected to each other via a base section 13. Preferably, the roller axle 8.2 is mounted on the legs 12.1, 12.2 such that the roller 8 is at least partially arranged between them. The support means 7 has a first lip 7.4 with which it engages in a recess formed in the longitudinal direction LN between the two sections 6.1 of the passage 6, such that the first lip 7.4 bears against the first housing part 3 in the longitudinal direction LN and the load direction LS, as shown in particular in Figure 2. Fig. 1b is evident. In this way, a displacement of the support element 7 in the longitudinal direction LN and a clockwise rotation in the plane of the drawing are prevented. Furthermore, the support element 7 has a second lip 7.5 with which it also rests against the first housing part 3 to prevent counterclockwise rotation in the plane of the drawing. The second lip 7.5 extends completely along a longitudinal length of the support element 7.

[0032] The spring assembly 5 comprises a first mechanical spring element 5.1 and a second mechanical spring element 5.2, wherein the spring elements 5.1, 5.2 are generally preferably designed as compression springs and helical springs, respectively. The spring elements 5.1, 5.2 engage with their upper end (in the load direction LS) in a recess formed in the first housing part 3, so that they are fixed in a plane perpendicular to the load direction LS. With their lower ends (in the load direction LS), the spring elements 5.1, 5.2 bear against the second housing part 4. The bearing 1 also has two identically designed guide means 14, along which a displacement of the housing parts 3, 4 relative to each other is guided. Generally preferably, the guide means 14 are designed as guide pins. In the present case, the guide means 14 each pass concentrically through a spring element 5.1, 5.2. The guide means 14 have an upper end section 14 (in the load direction LS).1. An external thread is provided, by which they are screwed into an internal thread of the first housing part 3 for fastening. The guide element 14 is guided through a guide channel 4.1 of the second housing part 4 and rests against the second housing part 4 with a bearing surface formed by a chin 14.2 in the manner of a screw head, such that the second housing part 4 is held securely against the first housing part 3. In the guide channel 4.1, a sliding element 15 in the form of a sliding sleeve is arranged between the guide element 14 and the guide channel 4.1, with which the second housing part 4 can slide along a sliding section 14.3 of the guide element 14 when the housing parts 3, 4 are displaced relative to each other. In the present and generally preferred version, the sliding element 15 is made of a tribological material. The in . Fig. 2 The bearing arrangement shown is load-free, so that the contact surface 7.1 and the running surface 8.1 are arranged offset from each other in the longitudinal direction LN and the guide section 9 rests exclusively on the running surface 8.1 in the longitudinal direction LN.

[0033] In Fig. 3, encompassing the Fig. 3a, Fig. 3b and Fig. 3c are sectional views of a side view of the Fig. 2 shown embodiment of the bearing arrangement according to the invention at different load forces. Fig. Figure 3a shows the bearing arrangement and bearing 1 in a rest state in which no load force acts on the bearing, so that the two housing parts 3, 4 are pressed into their initial position by a spring force of the spring assembly 5 and the bearing 1 rests in the longitudinal direction LN only with the running surface 8.1 of the roller 8 against the guide section 9. The guide section 9 is spaced apart from the contact surface 7.1 of the support means 7 in the load direction LS, so that bearing 1 and guide section 9 can only be displaced relative to each other via the roller 8 and with minimal friction. Fig. Figure 3b shows the bearing arrangement and bearing 1 in a state where a load force acts on bearing 1 in the load direction LS, but this force is less than a limiting force. The load force opposes the spring force applied to housing parts 3 and 4 by the spring assembly 5, causing the first housing part 3 to be displaced along the load direction LS towards the second housing part 4. The first housing part 3 is displaced until a force equilibrium is reached due to an increase in the spring force caused by the displacement. This also occurs in the Fig. In the state shown in 3b, the bearing 1 is only in contact with the running surface 8.1 of the roller 8 on the guide section 9, so that even with an acting load force below the limit force, a friction-minimized displacement of bearing 1 and guide section 9 against each other is possible. Fig. Figure 3c shows the bearing arrangement in a load operating condition and bearing 1 in a load condition in which a load force exceeding the limit force acts on bearing 1. In this condition, the first housing part 3 is displaced along the load direction LS to such an extent that bearing 1, in the load direction LS, no longer rests solely on the running surface 8.1, but also on the contact surface 7.1 against the guide section 9. This displacement of the first housing part 3 ensures that even under very high load forces, a maximum force equal to the limit force can act on roller 8, and the remaining portion of the limit force is transferred into the housing 2 via the contact surface 7.1. Advantageously, roller 8 and roller axle 8.2 are protected from overload in this way.In the present and generally preferred form, the support element 7 is made of a tribological polymer, so that a comparatively easy displacement of bearing 1 and guide section 9 relative to each other is advantageously still possible, albeit with higher friction than in the . Fig. 3a and Fig. 3b shown conditions. Reference symbol list 1 warehouse 2 cases 3 first housing part 3.1 Recess 3.2 Arms 4 second housing part 4.1 Guide channel 5 Spring assembly 5.1 mechanical spring element 6 Implementation 6.1 Section of Implementation 7 Investment funds 7.1 Plant area 7.2 First opening 7.3 second opening 7.4 first lip 7.5 second lip 8 roll 8.1 Running surface 8.2 Roller axle 9. Guided Section 10 Bridge 11 rail bodies 12.1 Leg of the U-shaped section 12.2 Leg of the U-shaped section 13 Basic section 14 Management tools 14.1 upper end section 14.2 Chin 14.3 Gliding section 15 sliding element

Claims

[1] Bearing (1) for longitudinally displaceable support of a guide section (9) of a rail extending with its cylinder axis in the longitudinal direction (LN), wherein the bearing (1) comprises a housing (2) with a longitudinally extending passage (6) in which, in an operating state of the bearing (1), the guide section (9) of the rail is arranged, and wherein a receptacle for bearing against the guide section (9) of the rail in a load direction (LS) perpendicular to the longitudinal direction (LN) is formed in the passage (6) in the operating state, wherein the housing (2) comprises a first housing part (3) and a second housing part (4) and at least one bearing means (7) with a bearing surface (7.1) is provided on the first housing part (3) and at least one running surface (8) is provided on the second housing part (4) offset in the longitudinal direction (LN) to the bearing surface (7.1) of the bearing means (7).1) having a roller (8) rotatably mounted about a roller axis (8.2) extending perpendicular to the longitudinal direction (LN), . characterized by , that the running surface (8.1) and the contact surface (7.1) each form a different part of the receptacle and that the two housing parts (3, 4) are resiliently displaceable relative to each other by means of a spring device (5) in order to change the bearing position of the running surface (8.1) relative to the contact surface (7.1) along the load direction (LS). [2] Bearing (1) according to claim 1, characterized by, that in one of the first or second housing part (3, 4) a recess (3.1) extending in the load direction (LS), in particular in a direction (R) perpendicular to the longitudinal direction (LN) and load direction (LS), is formed through the housing part (3, 4), in which at least one section of the other of the first and second housing part (3, 4) can be guided to displace the first housing part (3) and the second housing part (4) relative to each other, wherein in particular the recess (3.1) is bounded by a wall area of ​​one housing part (3, 4) which encloses the section of the other housing part (3, 4) on both sides along at least one direction. [3] Bearing (1) according to claim 1 or claim 2, characterized by , that the second housing part (4) has at least one U-shaped section in a cross-section perpendicular to the longitudinal direction (LN) and that the roller axle (8.2) is supported on legs (12.1, 12.2) of the U-shaped section. [4] Bearing (1) according to any one of the preceding claims, characterized by , that a first contact surface (7.1) and a second contact surface (7.1) are formed on the recording, wherein the first contact surface (7.1) is formed in the longitudinal direction (LN) in front of the running surface (8.1) and the second contact surface (7.1) is formed in the longitudinal direction (LN) behind the running surface (8.1). [5] Bearing (1) according to any one of the preceding claims, characterized by that the second housing part (4) and / or the first housing part (3) are displaceable relative to each other along at least one guide means (14) extending in the load direction (LS), in particular a guide pin. [6] Bearing (1) according to claim 5, characterized by, that the at least one guide means (14) is attached to one of the first or second housing parts (3, 4), in particular detachably, and in particular is partially screwed into this housing part (3, 4), and is arranged at least partially in a guide channel (4.1), which in particular is designed as a bore, of the other housing part (3, 4), wherein in particular the guide means (14) extends through the guide channel (4.1) of the other housing part (3, 4) and the guide channel (3, 4) and a lower end of the guide means (14) are designed to correspond to each other in such a way that the other housing part (3, 4) is held by the guide means (14) securely on one housing part (3, 4). [7] Bearing (1) according to claim 6, characterized by, that the guide means (14) has a sliding section (14.3) extending in the load direction (LS) with which it engages at least partially in the guide channel (4.1) to ensure sliding on the guide channel (4.1) when the housing parts (3, 4) are displaced relative to each other. [8] Bearing (1) according to claim 7, characterized by , that at least one sliding element (15), in particular a sliding sleeve, is arranged between guide channel (4.1) and sliding section (14.3), by means of which the other housing part (3, 4) can slide along the sliding section (14.3), wherein the sliding element (15) in particular bears against the other housing part (3, 4) and / or the sliding section (14.3). [9] Bearing (1) according to any one of claims 5 to 8, characterized by, that at least one section of the spring assembly (5) is guided along the at least one guide means (14) for fixing relative to the guide means (14) and / or first housing part (3) and / or second housing part (4) in a plane perpendicular to the load direction (LS). [10] Bearing (1) according to any one of the preceding claims, characterized by , that at least a part of the spring assembly (5) engages in at least one of the housing parts (3, 4) in such a way that the engaging part is fixed in a plane perpendicular to the load direction (LS) relative to the housing part (3, 4). [11] Bearing (1) according to any one of the preceding claims, characterized by , that the spring device (5) comprises at least one mechanical spring element (5.1), wherein the mechanical spring element (5.1) is in particular designed as a compression spring. [12] Bearing (1) according to any one of the preceding claims, characterized by, that the spring device (5) has a spring constant of at least 10 N / mm, in particular at least 15 N / mm, in particular at least 20 N / mm, and in particular at most 100 N / mm, in particular at most 80 N / mm. [13] Bearing (1) according to any one of the preceding claims, characterized by , that the plant equipment (7) comprises a wall that defines an interior space of the plant equipment (7). [14] Bearing (1) according to claim 13, characterized by , that the interior space bounded by the wall of the system element (7) has at least partially a cross-section that is elongated in the direction of the load (LS), in particular oval, perpendicular to the longitudinal direction (LN). [15] Bearing (1) according to claim 13 or claim 14, characterized by, that the wall of the system element (7) has at least one opening (7.3) through which the roller (8) engages at least partially in the interior and the opening (7.3) extends in particular in the longitudinal direction (LN) only along a part of the system element (7). [16] Bearing (1) according to any one of the preceding claims, characterized by , that the installation element (7) has at least one securing element with which the installation element (7) bears against the first housing part (3) and / or engages in a recess of the first housing part (3) to prevent displacement in the longitudinal direction (LN) and / or to prevent rotation about the installation element axis in at least one direction of rotation, in particular in two directions of rotation. [17] Bearing (1) according to any one of the preceding claims, characterized by, that the receptacle has a clear cross-section perpendicular to the longitudinal direction (LN) through which a bearing axis runs in the longitudinal direction (LN), wherein in a rest state of the bearing (1) the contact surface (7.1) has a different, in particular greater, distance from the bearing axis than the running surface (8.1) and in a load state of the bearing (1) at least one of the contact surface (7.1) and running surface (8.1) has a different distance from the bearing axis than in the rest state, wherein in particular in the load state the contact surface (7.1) has the same distance from the bearing axis as the running surface (8.1). [18] Bearing (1) according to any one of the preceding claims, characterized by, that the device (7) is designed to allow the bearing (1) to slide along the guide section (9) in the operating state and is in particular made of a tribological polymer and / or the first housing part (3) and / or the second housing part (4) is made of a metal or a metal alloy, in particular by die casting. [19] Bearing arrangement comprising a bearing (1) according to one of the preceding claims and a rail with a guide section (9) designed in the manner of a cylinder, wherein in a load operating state of the bearing arrangement in which a load force above a limit force acts between guide section (9) and bearing (1) in the load direction (LS), the guide section (9) is arranged to be displaceable in the longitudinal direction (LN) in the passage (6) of the housing (2) along the load direction (LS) against the running surface (8.1) and against the contact surface (7.1) and is pressed against the receiving by the load force, wherein a distribution of the load force between the contact surface (7.1) and the running surface (8.1) is determined by means of the spring device (5) depending on an amount of the load force. [20] Storage arrangement according to claim 19, characterized by, that the guide section (9) is only in contact with the running surface (8.1) when the load force is acting in the longitudinal direction (LN) below the limit force in the load direction (LS) and is displaceable along the load direction (LS) when the load force changes in a range below the limit force, while remaining in contact with the running surface (8.1) relative to the contact surface (7.1). [21] Storage arrangement according to claim 19 or claim 20, characterized by that the limiting force is at least 100 N, in particular at least 200 N, and in particular less than 800 N, in particular less than 700 N. [22] Use of a bearing (1) according to any one of claims 1 to 18, wherein a guide section (9) of a rail is inserted into the passage (6) and is pressed against the receiving with the guide section (9) with a load force acting in the load direction (LS), wherein the load force is changed and by changing the load force the housing parts (3, 4) are displaced against each other along the load direction (LS) by changing a ratio of a first partial load force with which the guide section (9) presses against the running surface (8.1) and a second partial load force with which the guide section (9) presses against the contact surface (7.1). [23] Sliding element for use as a support means (7) in a bearing (1) according to one of claims 1 to 18, wherein the sliding element comprises a wall that defines an interior space of the sliding element, and a first opening (7.2) for a web (10) of a guide section (9) of a rail is formed in the wall, wherein the first opening (7.2) extends along the entire length of the sliding element in the longitudinal direction (LN) and the guide section (9) can be passed through the interior space along the entire length of the sliding element. characterized by , that a second opening (7.3) is formed in the wall for the engagement of at least one roller (8) of the bearing (1) into the interior and wherein the second opening (7.3) extends only partially along the wall in the longitudinal direction (LN).

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