Sustainable sliding bearing assembly

Abstract

The invention relates to a slide bearing assembly comprising a slide block and a rail, the rail having a cylindrical guide section, the cylinder axis of which extends in the longitudinal direction, the slide block having a feed-through extending in the longitudinal direction for receiving the guide section of the rail, the guide section being arranged in the slide block in the operating state of the slide bearing assembly. The sliding block can be guided in a sliding manner on the rail in the longitudinal direction in an operating state in which the guide section is arranged in the feed-through section of the sliding block and is surrounded by the inner side of the feed-through section when the position of the sliding block perpendicular to the longitudinal direction is determined, and wherein, in particular in the operating state, the sliding block rests on the rail only by means of the inner side of the feed-through section of the sliding block, the guide section is made of wood, and the inner side of the feed-through part is made of sliding plastic, in particular friction polymer.

Description

Technical Field

[0001] The present invention relates to a sliding bearing assembly according to the preamble of claim 1, a system including such a sliding bearing assembly, the application of such a sliding bearing assembly, and the application of materials for realizing such a sliding bearing assembly. Background Technology

[0002] Such sliding bearing assemblies include sliders and tracks configured corresponding to each other. These assemblies are used to move two different components relative to each other in a longitudinal direction, wherein a first component of the components is secured to the slider, and a second component of the components is secured to the track. For this purpose, the track is constructed to extend longitudinally and has a cylindrical guide section whose cylindrical axis extends longitudinally. The slider has a guide portion corresponding to the cylindrical guide section, such that in the operating state of the sliding bearing assembly, the guide section of the track is arranged within the guide portion of the slider, and in this operating state, the guide portion surrounds the guide section, such that the slider is positioned relative to the track in various directions perpendicular to the longitudinal direction, but the slider can move longitudinally along the track, wherein during this movement, the outer side of the guide section abuts against the inner side of the guide portion and slides along the inner side. Typically, the track has a longitudinal extension length that is at least four times, particularly at least five times, and especially at least ten times, the longitudinal extension length of the slider. Therefore, the track is a considerable movement path in the longitudinal direction along which the slider can move. The track is usually constructed as a straight line, and the guide section is constructed as a straight cylinder, such that in operation, the slider, guided by the track, can only move in a straight line extending longitudinally along the track. The cylinder may, for example, have a circular or angular cross-section that is constant throughout the entire longitudinal extension of the cylinder, thus allowing the slider to be uniformly guided within the longitudinal extension of the guide section.

[0003] These types of sliding bearing assemblies are widely used in various applications, such as furniture, mobile display devices, or machinery (e.g., transport machinery, measuring machinery, or machinery used for filling and packaging). A key requirement is to provide a sliding support for the slider on the track that is as wear-free and maintenance-free as possible, with a long service life and low friction. Particularly desirable is a lubricant-free support configuration between the track and the slider, as this avoids unnecessary contamination and, more importantly, requires minimal maintenance. Suitable material pairings for the track and slider have been developed in the prior art, enabling sliding bearing assemblies that at least meet most of the aforementioned requirements. Typically, to ensure service life, the track is made of metal (such as steel or stainless steel), which allows for cost-effective and standardized manufacturing of tracks with considerable longitudinal extension. For the inner side of the slider's guide portion (the inner side being the sliding pairing with the track, i.e., the inner side being constructed corresponding to the surface on which the slider rests against the track during slider movement), bronze or sliding plastic are suitable choices. Sliding plastics are polymeric materials that offer a low coefficient of friction relative to the material of the track, particularly thermoplastics (such as polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride, and polytetrafluoroethylene) and thermosetting plastics (such as phenolic resins). To further reduce friction, the plastic may contain lubricants, especially fine-particle solid lubricants (such as polymeric solid lubricants, waxes, molybdenum disulfide, or graphite). These lubricated polymers are also known as friction polymers. By pairing track and slider materials in this way, as developed and known in the prior art, a robust track can be provided on the one hand, while on the other hand, a low-friction sliding bearing with minimal change over long sliding sections can be achieved, allowing the slider to have the longest possible lifespan on the track. Furthermore, the absence of the need for lubricants (i.e., the elimination of the need to supply lubricant, such as oil, to the outside of the sliding bearing assembly) reduces environmental burden and cumbersome maintenance. However, the production of such sliding bearing assemblies that meet the above requirements still consumes significant amounts of energy and requires the use and transportation of non-renewable raw materials, further contributing to a considerable environmental burden. Summary of the Invention

[0004] The objective of this invention is to provide a sliding bearing assembly, or a system including a sliding bearing assembly, or an application or material of a sliding bearing assembly, that at least partially addresses at least one drawback of such sliding bearing assemblies.

[0005] As a solution to the task upon which this invention is based, a sliding bearing assembly having the features described in claim 1 is proposed. This sliding bearing assembly according to the invention has a slider and a track, wherein the track has a cylindrical guide section, the axis of which extends longitudinally. The slider has a guide portion extending longitudinally for receiving the guide section of the track. In the operating state of the sliding bearing assembly, the slider is slidably guided along the track in the longitudinal direction, wherein the guide section is arranged within the guide portion of the slider and is surrounded by the inner side of the guide portion when determining the position of the slider perpendicular to the longitudinal direction. In the operating state, the guide portion surrounds the guide section intermittently or continuously with its inner side, but in either case, the position of the slider perpendicular to the longitudinal direction (especially in all directions perpendicular to the longitudinal direction) is determined by surrounding the guide section. Generally, it is preferred that the slider rests against the track only through the inner side of its guide portion in the operating state. Currently, the inner side of the guide portion preferably refers to the area of ​​the guide portion that, in the operating state, provides stops for the guide section in various directions extending perpendicular to the longitudinal direction, thereby fixing the position of the guide section relative to the slider in the perpendicular longitudinal direction. The sliding bearing assembly according to the invention may have the features described above for such sliding bearing assemblies in embodiments. The embodiments according to the invention described below can be combined in particularly advantageous ways.

[0006] According to the present invention, the guide section is made of wood, and the inner side of the through-part is made of sliding plastic (especially a friction polymer). The inventors unexpectedly discovered that the pairing of sliding plastic and wood is a particularly good material pairing for achieving sliding bearing assemblies. In the prior art, wood is generally not considered a reliable sliding fit due to its complex deformation characteristics, and is at best used in large-area equipment where heavy mating parts made of metal (especially bronze or steel) are used, with the addition of lubricants (such as water or oil) to ensure sufficient mobility of the parts relative to the wood. The present invention is based on the understanding that a track guide section with excellent and long service life can be provided by having the inner side of the through-part of the slider made of sliding plastic, while the guide section of the track is made of wood. Within the framework of this invention, it was discovered that the combined action of sliding plastic and wood provides tolerance to the inherent deformation tendency in wood. Furthermore, the use of sliding plastic also prevents excessive damage to the wood due to wear, as the sliding plastic and wood unexpectedly form a material pairing. In particular, the wood can receive sliding plastic abrasive particles during the use of the sliding bearing assembly, and it has been proven that wood is sufficient for the guide sections (especially the entire track) of the sliding bearing assembly's track. Therefore, this invention provides a sliding bearing assembly that is as sustainable as possible (i.e., environmentally friendly to produce), with sufficiently long guiding and sliding properties.

[0007] In one embodiment, to determine the position of the guide section in a direction perpendicular to the longitudinal direction, the inner side of the threaded portion has two opposing inner sections in that direction, and in the operating state, the guide section is arranged between these two inner sections. Here, "direction" refers to a specific direction extending perpendicular to the longitudinal direction. Preferably, in this direction, a gap is provided between the opposing inner sections, the gap being at least the sum of a reference gap of 0.2 mm and 0.5% of the total extension length of the guide section in that direction. This naturally relates to the operating state (in which the guide section is arranged within the threaded portion). In this specific direction, the gap means that the guide section can abut against one of the two opposing inner sections in that direction, and there is a gap between it and the opposing inner section in that direction, the spacing corresponding to the gap. Preferably, the gap is at least the sum of a reference gap of 0.2 mm and 0.8%, particularly 1%, of the total extension length of the guide section in that direction. In one embodiment, the total extension length of the guide section in that particular direction is 20 mm. In this embodiment, a gap is provided in the operating state, the size of which is the sum of a 0.2 mm reference gap and 1.0% of the total extension length of the guide section in that particular direction. In the illustrated embodiment, the gap is therefore 0.2 mm + 0.2 mm = 0.4 mm. Here, it is set under predetermined conditions according to the operating state, such as a room temperature of 20°C and an indoor air humidity of 60%. The inventors have found that this gap can still be compensated for by the interaction between the wood and the sliding plastic, thereby ensuring reliable, low-loss, and low-friction guidance of the slider on the track. Simultaneously, the gap can accommodate the deformation behavior of the guide section. Particularly preferred is that, in the operating state, this gap (whose size is determined as described above) is provided in two different directions extending perpendicular to the longitudinal direction and at 90° angles to each other. Therefore, the gap between the opposing inner sections of the guide section in a defined direction is provided not only with respect to the first direction but also with respect to the second direction, wherein the first and second directions extend perpendicular to the longitudinal direction as described and are at a 90° angle to each other. In each of these directions, the inner side has two opposing inner sections, and in the operating state, the gap of the guide section is provided between these opposing inner sections, the size of which is at least the sum of a reference gap of 0.2 mm and 0.5% of the total extension length of the guide section in the respective direction.

[0008] In one embodiment, the guide section has an extension length of at least 8 mm, particularly at least 10 mm, particularly at least 15 mm, particularly a maximum of 50 mm, particularly a maximum of 40 mm, and particularly a maximum of 30 mm in any direction perpendicular to the longitudinal direction within the area received by the guide section in its operating state. The area of ​​the guide section is the entire region by which the guide section extends within the guide section in its operating state and is thus surrounded by the inner side of the guide section when its position relative to the track perpendicular to the longitudinal direction is determined. Particularly preferably, the guide section has a cross-section configured as a cylinder, a prism, a dovetail, or simply a rectangle (especially a square or rectangular). In one embodiment, the track is entirely made of wood and has a cross-section perpendicular to the longitudinal direction, the cross-section being at least segmentally T-shaped, and thus having a transverse bar and a bar extending perpendicularly thereto, wherein the transverse bar forms the guide section, which is surrounded by the guide section in its operating state, and the bar extending perpendicularly thereto extends beyond the guide section in its operating state. The transverse bar can be constructed, for example, rectangular or rounded. A bar extending perpendicularly to this transverse bar can be constructed continuously along the entire longitudinal extension of the track or have interruptions. Such a bar extending perpendicularly to the transverse bar can facilitate support of the guide section along the longitudinal extension of the track.

[0009] In one embodiment, less than 20% by weight, particularly less than 10% by weight, and especially less than 7% by weight, of the sliding plastic is made of petroleum-based plastic. In another embodiment, at least 90% by weight, particularly at least 95% by weight, of the sliding plastic is made of recycled plastic. Generally, it is preferred that the inner side of the guide portion is constructed of a plastic component, particularly manufactured by injection molding. In one embodiment, the slider has a slider body with a longitudinally penetrating opening in which a sliding element made of sliding plastic is arranged, wherein the sliding element constructs the inner side of the guide portion. The sliding element may, for example, be constructed in a hollow cylindrical shape. In one embodiment, the entire slider is made of sliding plastic. Because less than 20% by weight of the sliding plastic is made of petroleum-based plastic, and / or at least 90% by weight of recycled plastic, the sliding bearing assembly can be manufactured particularly resource-efficiently and thus particularly sustainably. It has been found that even without the use of petroleum-based plastic, sufficient sliding performance of the sliding plastic relative to wood can still be achieved through direct interaction with wood. In one embodiment, the sliding plastic comprises components made of renewable raw materials at least 80% by weight, particularly at least 90% by weight. It has been particularly advantageous, for example, to have at least 80% by weight, particularly at least 90% by weight, of the sliding plastic made from plastics based on castor oil or other similar oils derived naturally from plants. Such sliding plastics have been found particularly suitable for pairing with wood, wherein it has been discovered that only a small amount of lubricant needs to be added to such plastics derived from renewable raw materials to produce sliding plastics suitable for implementing sliding bearing assemblies according to the invention. Preferably, the share of lubricant in the sliding plastic is preferably less than 10% by weight, particularly less than 8% by weight, particularly less than 6% by weight. Generally preferably, at least 3% by weight, particularly at least 4% by weight, particularly at least 5% by weight, of the sliding plastic comprises lubricant. Particularly preferably, the lubricant comprises a solid lubricant, such as at least one polymeric solid lubricant. Generally preferably, at least 90% by weight, particularly at least 95% by weight, particularly at least 98% by weight, of the sliding bearing assembly as a whole is made from recycled plastics and / or renewable raw materials. Because the entire sliding bearing assembly is manufactured primarily using recycled plastics and / or renewable raw materials, the sliding bearing assembly can be produced in a particularly environmentally friendly manner. Unexpectedly, by professionally mixing the components of the sliding plastic according to the aforementioned particularly advantageous weight proportions, it is advantageous to produce a sliding plastic for realizing the inner side of the guide section, which, in conjunction with the guide section made of wood, enables a long-life, reliable sliding bearing assembly.

[0010] In one embodiment, during operation, the slider can bear a load in a load direction perpendicular to the longitudinal direction under surface pressure generated between the inner side of the slider's guide portion and the guide section of the track. While maintaining this surface pressure (i.e., during the period the slider bears the load), the slider can slide relative to the track in the longitudinal direction along the track. The load direction preferably corresponds to the specific direction described above, especially in conjunction with the corresponding embodiment. In one embodiment, the sliding bearing assembly is configured such that the track has a lower side that forms one end of the track relative to a vertical direction perpendicular to the longitudinal direction, wherein the load direction extends from top to bottom parallel to the vertical direction, and the slider is arranged at least segmentally above the track. Particularly preferably, the sliding bearing assembly can withstand a greater load in the load direction than in the direction perpendicular to both the load direction and the longitudinal direction. Particularly preferably, the sliding bearing assembly is used such that, while the track remains in a fixed position, the load acts on the slider of the sliding bearing assembly in the load direction.

[0011] Particularly preferred is that the sliding bearing assembly is configured such that, in operation, while the slider bears the aforementioned load (which exerts a force of at least 200 N on the slider along the load direction and, consequently, on the slider relative to the track in the load direction), the slider can slide along the track in the longitudinal direction relative to the track, wherein, preferably, when the slider moves relative to the track in the longitudinal direction at a speed of 0.1 m / s, the friction value is less than 0.4, particularly less than 0.3, and particularly less than 0.25. It has been found that this performance of the sliding bearing assembly can be achieved by professionally selecting the area of ​​the guide section that presses against the track in operation, combined with a wood-sliding plastic sliding pairing. Furthermore, this performance can be ensured by having multiple guide sections on the track and multiple through-parts on the slider, as explained in detail below. Particularly preferred is that the sliding bearing assembly is configured such that, when the slider bears a 50N load relative to the track in the load direction, starting from the initial state where the sliding bearing assembly is in operation, the slider can move a section of at least 100km, particularly at least 500km, relative to the track in the longitudinal direction, and at the end of this moving section, the gap between the guide section and the inner side of the guide portion, which existed in the initial state, increases to less than 200%, particularly less than 150%, of its initial value. Here, the moving section refers to the total length of the section in the longitudinal direction in which the slider moves relative to the track. Accordingly, the moving section has a starting point and an ending point. At the starting point of the moving section, the sliding bearing assembly is in the initial state; at the ending point of the moving section, the sliding bearing assembly is in the final state, wherein the sliding bearing assembly is in operation in both the initial and final states. The difference between the initial and final states is only that the moving section has been traversed between the initial and final states. Because the sliding bearing assembly is configured such that the gap remains almost unchanged even when the slider is loaded over a correspondingly long travel segment, a long service life and reliable functionality of the sliding bearing assembly can be ensured. For this purpose, a professionally selected suitable geometry is chosen for the guide section or track and the inner side or slider, especially in conjunction with the aforementioned advantageous properties of the sliding plastic. The gap is defined, as described above, in relation to a specific direction perpendicular to the longitudinal direction. Particularly preferred is that the sliding bearing assembly is designed such that, when subjected to a surface pressure load of 0.4 MPa generated between the inner side and the guide section, the slider, starting from its initial state, can move relative to the track in the longitudinal direction for a travel segment of at least 100 km, particularly at least 500 km, and at the end of this travel segment, the gap present in the initial state between the guide section and the inner side of the guide portion increases to less than 200%, particularly less than 150%, of its initial value.

[0012] Particularly preferably, in operation, the slider can bear a load in the load direction (generating a surface pressure of 0.4 MPa) and move relative to the track in the longitudinal direction at a speed of 0.1 m / s without lubrication, with a sliding friction value of less than 0.4, especially less than 0.3, especially less than 0.25. Particularly preferably, in operation, the slider can bear a load in the load direction (generating a surface pressure of 0.2 MPa) and move relative to the track in the longitudinal direction at a speed of 0.3 m / s without lubrication, with a sliding friction value of less than 0.2, especially less than 0.15. Particularly preferably, in operation, the slider can bear a load in the load direction (generating a surface pressure of 1.0 MPa) and move relative to the track in the longitudinal direction at a speed of 0.2 m / s without lubrication, with a sliding friction value of less than 0.4, especially less than 0.3, especially less than 0.25. It has been found that by professionally configuring the geometry of the guide section and the guide section, especially by setting such a surface (through which the inner side of the guide section and the guide section abut against each other under longitudinal load in operation, the aforementioned surface pressure can be achieved, and the corresponding friction value under this surface pressure can be set within a given range), not only can the sliding plastic be manufactured cost-effectively, but the service life of the sliding bearing assembly can also be ensured.

[0013] In particular, it has been advantageously found that the sliding bearing assembly is used within a load range that ensures the surface pressure between the inner side and the guide section is less than 1.5 MPa, especially less than 1.0 MPa, especially less than 0.7 MPa, especially less than 0.5 MPa, and especially less than 0.4 MPa. The inventors have found that the sustainable sliding bearing assembly according to the invention is particularly advantageous and can be used with a particularly long service life precisely within this range of surface pressure. Furthermore, the inventors have found that the aforementioned friction values ​​can be achieved particularly advantageously and simply through the aforementioned setting of the proportion of sliding plastic in the described sliding speed and surface pressure, especially even with the extensive use of recycled plastics and / or plastics obtained from renewable raw materials.

[0014] Particularly preferred is that the sliding bearing assembly is configured such that, in operation, the slider can bear a load in the load direction (generating a surface pressure of 0.1 MPa) to move relative to the track in the longitudinal direction without lubrication at an average speed of 0.18 m / s and a maximum speed of 0.3 m / s over a total section of 500 km with a wear value of less than 0.3 μm / km. This wear value refers to the material loss at the inner side of the guide section. The wear value can be determined, for example, by measuring the guide section at the beginning and end of the total section. Particularly preferred is that the total section is traversed in the following manner: the slider reciprocates relative to the track in strokes, wherein each stroke has a section of at least 30 cm, preferably 40 cm (i.e., the slider moves relative to the track in a 40 cm longitudinal section each stroke). At the beginning and end of each stroke, the slider's speed drops to zero, and the direction of movement of the slider changes. Particularly preferred is that the slider moves relative to the track such that it reaches its maximum speed at the midpoint between the beginning and end of each stroke. Preferably, triggered at the beginning and end of each stroke, the slider linearly accelerates to reach maximum speed and then linearly brakes, thereby achieving uniform acceleration from the beginning to the end of the stroke until reaching maximum speed and braking from maximum speed. Preferably, the preferred embodiment described above, at a surface pressure of 0.4 MPa, after traveling at least 100 km of road, results in a clearance increase of no more than 200%. This embodiment is applicable in ensuring this small increase in clearance when traversing the formed road section, as explained above regarding stroke and speed. It is particularly advantageous to find that the configuration of the sliding plastic and the geometry of the inner and guide sections are specially selected to achieve this performance of the sliding bearing assembly, as this provides a resource-saving sliding bearing assembly that can be used reliably and for a long life in a variety of applications.

[0015] In one embodiment, the track has multiple cylindrical guide sections, and the slider has multiple through-parts. Each of the guide sections corresponds to exactly one of the through-parts. The guide sections and their corresponding through-parts can be configured as described above. For example, it is preferable that the cylindrical axes of all guide sections extend in the longitudinal direction. In an advantageous embodiment of the sliding bearing assembly described above, in the operating state, each guide section is arranged within a corresponding through-part of the slider and is surrounded by the inner side of its corresponding through-part when the slider is positioned perpendicular to the longitudinal direction. Preferably, all guide sections are made of wood, and the inner side of all through-parts is made of its sliding plastic. Particularly preferably, all guide sections have the same cross-section. Particularly preferably, in the operating state, especially when a load is applied to the slider in the longitudinal direction, the contact surface (through which one of the guide sections abuts its corresponding through-part) is equal for each pair of guide sections and their corresponding through-parts. Particularly preferably, the track has exactly two guide sections, and the slider has exactly two through-holes. Particularly preferably, the guide sections are spaced apart from each other in a transverse direction extending perpendicular to the longitudinal direction, wherein this transverse direction extends perpendicular to the vertical direction, and wherein, in the established application of the track, the track is secured to a structural element, such as a mechanical or furniture component, or a floor or wall, with its lower side (the lower side constituting the end of the track with respect to the vertical direction). Particularly preferably, the track has a track body that fixes the positions of the multiple guide sections to each other. Accordingly, all guide sections are fixedly secured to the track body. Particularly preferably, the entire track is made of wood. Particularly preferably, the entire track is manufactured as a single piece.

[0016] In one embodiment, the track has a track body extending over at least 80% of the guide section's length and fastened to the guide section. The track body has higher stiffness in the load-bearing direction perpendicular to the longitudinal direction than the guide section and is spaced apart from the inside of the guide portion in operation. For example, the guide section may be constructed as a transverse bar as described above with reference to the embodiments, and the track body constitutes a bar extending perpendicular to it. Preferably, the load-bearing direction coincides with the aforementioned load direction, especially in advantageous embodiments with corresponding combinations. The track body may extend continuously or intermittently over its longitudinal length, which is at least 80% of the longitudinal length of the guide section, particularly being the same as the longitudinal length of the guide section.

[0017] The present invention also relates to a system comprising a sliding bearing assembly according to the invention. The system comprises a first component and a second component, the first component being fixed to a slider and the second component being fixed to a track. The two components are preferably fixed only by means of the sliding bearing assembly in their relative positions perpendicular to the longitudinal direction. The two components can be guided to move relative to each other in the longitudinal direction via the sliding bearing assembly. In one embodiment, the system is furniture, and the two components are furniture parts, wherein, particularly preferably, the furniture parts are made of wood or recycled plastic. In one embodiment, the system is machinery (especially transport machinery), and the two components are mechanical components, wherein, particularly preferably, the mechanical components are made of wood or recycled plastic. Transport machinery refers to machinery whose use depends on the movement of the two components relative to each other in the longitudinal direction. Particularly preferably, the system is configured such that the described load (particularly with respect to a load advantageously positioned in the load direction) on the slider relative to the track is secured. Particularly preferred is that, in the system's established operating state (where the sliding bearing assembly is in its operating state), the components (in the case of such surface pressure generated between the inner sides of each guide section of the track and its corresponding guide section) are pressed against each other by the sliding bearing assembly in a direction perpendicular to the longitudinal direction, the surface pressure having a value less than 1.5 MPa, particularly less than 1.0 MPa, and particularly less than 0.5 MPa. Preferably, this surface pressure is at least 0.1 MPa. When there is only one guide section and only one guide section, the value naturally relates to the surface pressure between the inner sides of this guide section and this guide section. Preferably, the aforementioned direction corresponds to the aforementioned load direction. The system is used in a predetermined movement of the slider relative to the track in the longitudinal direction, such that the surface pressure between the inner sides of the guide section and its corresponding guide section is defined based on the characteristics of the system. The inventors recognize that the sliding bearing assembly according to the invention can be used particularly advantageously in such a system according to the invention. Particularly preferably, the system is configured such that, by means of a sliding bearing assembly, the slider can move relative to the track over a length of at least 30 cm (especially at least 50 cm, especially 1 m) in the longitudinal direction, and is thus guided and supported on the track along this section. Particularly preferably, the setting is used to limit this length to less than 2 m (especially less than 1 m, especially less than 50 cm).

[0018] The present invention also relates to the application of a sliding bearing assembly for guiding the movement of a first member relative to a second member in the longitudinal direction without lubrication. "Without lubrication" means that during this movement, the sliding bearing assembly does not require the supply of external lubricant; instead, the track and slider slide "dry" against each other, i.e., directly abutting each other without any lubricant between them. The sliding bearing assembly includes a slider and a track. The first member is fixed to the slider, while the second member is fixed to the track. The track has a cylindrical guide section whose cylindrical axis extends in the longitudinal direction. The slider has a through-hole extending in the longitudinal direction for receiving the guide section of the track. To ensure the guiding movement of the first member relative to the second member in the longitudinal direction, the guide section is arranged within the through-hole of the slider, such that it is surrounded by the inner side of the through-hole when the slider is positioned perpendicular to the longitudinal direction. According to the invention, a wooden rod is used as the guide section (especially the entire track). According to the invention, the inner side of the through-hole (through which the through-hole abuts against the guide section during the guiding movement of the first member relative to the second member in the longitudinal direction) is made of a sliding plastic (especially a friction polymer). The wooden pole is particularly preferably made of beech, birch, maple, oak, ash, spruce, pine, larch, or walnut. Applications according to the invention may include the features described above in embodiments of the sliding bearing assembly or system according to the invention. Accordingly, the sliding bearing assembly according to the invention may have the following features, which are described hereinforcingly with embodiments of the application according to the invention. This applies to all currently described applications. In one embodiment, the sliding bearing assembly is used to guide the movement of the first member relative to the second member longitudinally over a travel distance of at least 5 km, particularly at least 10 km, particularly at least 50 km, particularly at least 100 km. In one embodiment, the sliding bearing assembly is used to guide the movement of the first member relative to the second member longitudinally, wherein the surface pressure acting perpendicular to the longitudinal direction between the guide section and the inner side of the guide portion, particularly in the load direction, is at least 0.1 MPa, particularly at least 0.2 MPa, and less than 1.5 MPa, particularly less than 1.0 MPa.

[0019] The present invention also relates to the application of a sliding plastic for realizing the inner side of the guide portion of a slider, and the application of a slider for realizing a sliding bearing assembly having a slider and a track, the track having a longitudinally extending wooden rod as a guide section of the track, wherein, in the operating state of the sliding bearing assembly, the slider can slide and guide along the track in a longitudinal direction, and the guide section is arranged within the guide portion of the slider and is surrounded by the inner side of the guide portion when the position of the slider perpendicular to the longitudinal direction is determined. As mentioned above, this application may also have the features described in other embodiments currently associated with the sliding bearing assembly according to the invention or the application according to the invention. The invention is based on the particular understanding that using a sliding plastic to realize the inner side of the guide portion of the slider and using a wooden rod as a guide section of the track to realize the sliding bearing assembly, as described herein, is particularly advantageous. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to three accompanying drawings and through embodiments.

[0021] It shows: Figure 1 : A view of a first embodiment of the sliding bearing assembly according to the present invention in a schematic diagram; Figure 2 : Cut along the longitudinal direction in the schematic diagram Figure 1 The cross-section of the sliding bearing assembly; Figure 3 : A cross-section perpendicular to the longitudinal direction of another embodiment of the sliding bearing assembly according to the present invention in the schematic diagram. Detailed Implementation

[0022] Figure 1An embodiment of a sliding bearing assembly according to the present invention in its operating state is shown. The sliding bearing assembly has a track 1 and a slider 2. The slider 2 has a guide portion in which a guide section 10 of the track 1 is arranged in the operating state. Currently, the track 1 is formed by the guide section 10, which is currently constructed as a straight cylinder. The slider 2 has a metal sleeve 21 and a sliding element 20, which is mounted inside the metal sleeve 21 and forms the inner side of the guide portion of the slider 2, and this inner side surrounds the guide section 10 of the track 1. Currently, the inner side is constructed by the side surface of the protrusion 200 of the sliding element 20, which faces the guide section 10 radially (i.e., in a direction perpendicular to the longitudinal direction X). When the guide section moves relative to the slider 2 perpendicular to the longitudinal direction X, the guide section 10 only moves until it abuts against the inner section of the inner side of the guide portion. Thus, the guide section 10 is reliably guided perpendicularly to the longitudinal direction within the guide portion of the slider 2, while the slider 2 can slide relative to the track 1 along the longitudinal direction X. Currently, the entire track (i.e., the guide section 10) is made of wood, while the sliding element 220 constituting the inner side of the guide portion is made of sliding plastic by injection molding. This sliding plastic is 94% made from renewable raw materials and contains 6% solid lubricant (currently wax and polymer solid lubricant). The renewable raw material is plant-derived oil, from which plastic is manufactured, and then the plastic is used as plastic pellets to produce the sliding element 20.

[0023] Depend on Figure 2 As can be seen, in operation, the guide section 10 has a very small gap (currently 0.5 mm, within which...) Figure 2 The guide section is held within the guide portion of the slider 2 in a direction perpendicular to the longitudinal direction X (within the paper surface). The guide section has a diameter of 20 mm. Furthermore, the protrusions 200 ensure particularly frictionless guidance of the guide section within the guide portion of the slider 2, because on the one hand, the protrusions set the contact surface between the inner side and the guide section within a reasonable range, on the other hand, the protrusions are evenly distributed about the guide section, and there is also an intermediate space between the protrusions for receiving impurities.

[0024] Figure 3 A schematic diagram (showing its cross-section perpendicular to the longitudinal direction X) illustrates another embodiment of the sliding bearing assembly according to the invention. This embodiment is similar to... Figure 1 and Figure 2The main difference in the illustrated embodiment is that the slider 2 is entirely made of sliding plastic, while the track 1 has a cross-section perpendicular to the longitudinal direction, the cross-section being T-shaped in section. The transverse bars of the T-shape form the guide section 10, and the bars extending perpendicular to the transverse bars of the T-shape extend beyond the through-part of the slider 2. The track 1 as a whole has an H-shaped cross-section perpendicular to the longitudinal direction X, with only one section constructed in a T-shape. The area of ​​the track 1's cross-section outside the T-shape forms the lower side of the track 1, by means of which the track can be mounted onto a structural element. Figure 3 The sliding bearing assembly shown is loaded along a predetermined load direction, which is currently vertical (the lower side of track 1 forms one end of the track relative to this vertical direction). In other embodiments not shown, track 1 may have at least a T-shaped cross-section in which the transverse rod is rounded (e.g., an elliptical or circular section) and extends in the transverse direction over a greater length than the T-shaped other rod perpendicular to it.

[0025] List of reference numerals 1 track 2 sliders 10. Guiding Section 20 Sliding elements 21 Metal Sleeve 200 protrusions

Claims

1. A sliding bearing assembly comprising a slider (2) and a track (1), wherein, The track (1) has a cylindrical guide section (10) with the cylindrical axis of the guide section extending in the longitudinal direction. The slider (2) has a through-part extending in the longitudinal direction for receiving the guide section (10) of the track (1). In the operating state of the sliding bearing assembly, the slider (2) can slide and guide on the track (1) in the longitudinal direction. In the operating state, the guide section (10) is arranged within the through-part of the slider (2) and is surrounded by the inner side of the through-part when the position of the slider (2) is determined to be perpendicular to the longitudinal direction. In particular, in the operating state, the slider (2) rests against the track (1) only through the inner side of its through-part. The characteristic feature is that the guide section (10) is made of wood, and the inner side of the guide portion is made of sliding plastic, especially friction polymer.

2. The sliding bearing assembly according to claim 1, Its features are, In order to determine the position of the guide section (10) in a direction perpendicular to the longitudinal direction, the inner side of the guide portion has two opposing inner sections in that direction, and the guide section (10) in the operating state is arranged between the inner sections, wherein, in that direction, a gap of the guide section (10) is provided between the opposing inner sections, the size of which is at least the sum of a reference gap of 0.2 mm and 0.5% of the total extension length of the guide section (10) in that direction, wherein, especially in the operating state, such a gap of the guide section (10) is provided between the opposing inner sections in two different directions that extend perpendicular to the longitudinal direction and have an angle of 90° with each other.

3. The sliding bearing assembly according to any one of the preceding claims, Its features are, The guide section (10) has an extension length of at least 8 mm, especially at least 10 mm, and especially at most 50 mm, especially at most 40 mm in any direction perpendicular to the longitudinal direction in the area where it is received by the guide in the operating state.

4. The sliding bearing assembly according to any one of the preceding claims, Its features are, The sliding plastic comprises less than 20% by weight, particularly less than 10% by weight, of petroleum-based plastic, and / or at least 90% by weight, particularly at least 95% by weight, of recycled plastic.

5. The sliding bearing assembly according to any one of the preceding claims, Its features are, At least 90% of the weight of the sliding bearing assembly as a whole, particularly at least 95% of the weight, and especially at least 98% of the weight, is made of recycled plastics and / or renewable raw materials.

6. The sliding bearing assembly according to any one of the preceding claims, Its features are, The sliding plastic comprises at least 3% by weight, particularly at least 5% by weight, of a lubricant, and the lubricant particularly includes solid lubricants, especially at least one polymeric solid lubricant.

7. The sliding bearing assembly according to any one of the preceding claims, Its features are, In the operating state, when surface pressure is generated between the inner side and the guide section (10), the slider (2) can bear the load in the load direction perpendicular to the longitudinal direction, and while maintaining the surface pressure, the slider can slide relative to the track (1) in the longitudinal direction along the track, wherein, in particular, the load has a force of at least 200N on the slider (2) in the load direction, and / or when bearing a 50N load, the slider (2) can move relative to the track (1) in the longitudinal direction for at least 100km, especially at least 500km from the initial state, and here, at the end of the moving section, the gap between the guide section (10) and the inner side of the guide portion that exists in the initial state increases to less than 200%, especially less than 150%, of its value that exists in the initial state.

8. The sliding bearing assembly according to claim 7, Its features are, In the operating state, the slider (2) can bear a load in the load direction that produces a surface pressure of 0.4 MPa, and can move without lubrication relative to the track (1) in the longitudinal direction at a speed of 0.1 m / s with a sliding friction value of less than 0.4, especially less than 0.3, especially less than 0.25, and / or bear a load in the load direction that produces a surface pressure of 0.2 MPa, and can move without lubrication relative to the track (1) in the longitudinal direction at a speed of 0.3 m / s with a sliding friction value of less than 0.2, especially less than 0.15, and / or bear a load in the load direction that produces a surface pressure of 1.0 MPa, and can move without lubrication relative to the track (1) in the longitudinal direction at a speed of 0.2 m / s with a sliding friction value of less than 0.4, especially less than 0.3, especially less than 0.

25.

9. The sliding bearing assembly according to any one of claims 7 or 8, Its features are, In the operating state, the slider (2) can withstand a load that generates a surface pressure of 0.1 MPa in the load direction, and can move without lubrication along the longitudinal direction relative to the track (1) at an average sliding speed of 0.18 m / s and a maximum sliding speed of 0.3 m / s for a total road section of 500 km, with a wear value of less than 0.3 μm / km, wherein the wear value indicates the material loss at the inner side of the guide portion.

10. The sliding bearing assembly according to any one of the preceding claims, Its features are, The track (1) has multiple cylindrical guide sections (10), and the slider (2) has multiple guide portions, wherein, in the operating state of the sliding bearing assembly, each of the guide sections (10) is arranged in the corresponding guide portion of the slider (2) and is surrounded by the inner side of the corresponding guide portion when the position of the slider (2) is determined to be perpendicular to the longitudinal direction, wherein all guide sections (10) are made of wood, and the inner side of all guide portions is made of sliding plastic, especially friction polymer.

11. The sliding bearing assembly according to any one of the preceding claims, Its features are, The track (1) has a track body that extends over at least 80% of the longitudinal extension length of the guide section (10) and is fastened to the guide section, wherein the track body has a higher stiffness than the guide section (10) in the load direction perpendicular to the longitudinal direction, and is spaced apart from the inside of the guide portion in the operating state.

12. A system comprising a sliding bearing assembly according to any one of the preceding claims, Its features are, The system includes a first component fixed to a slider (2) and a second component fixed to a track (1), wherein the two components are defined in their relative positions perpendicular to the longitudinal direction only by the sliding bearing assembly and are movable relative to each other in the longitudinal direction, wherein the system is furniture and the components are furniture components, especially furniture components made of wood or recycled plastic, or the system is machinery and the components are mechanical components, especially mechanical components made of wood or recycled plastic.

13. The system according to claim 12, Its features are, In the established operating state of the system, when the surface pressure is generated between the inner side of each guide section (10) of the track (1) and the corresponding guide portion in a direction perpendicular to the longitudinal direction, the components are pressed together by a force through the sliding assembly, the surface pressure having a value of less than 1.5 MPa, especially less than 1.0 MPa, especially less than 0.5 MPa, and especially at least 0.1 MPa.

14. An application of a sliding bearing assembly, said sliding bearing assembly being used to guide a first member relative to a second member in a longitudinal direction without lubrication, wherein, The sliding bearing assembly includes a slider (2) and a track (1), wherein the first component is fixed on the slider (2) and the second component is fixed on the track (1), wherein the track (1) has a cylindrical guide section (10) with the cylindrical axis of the guide section extending in the longitudinal direction, and the slider (2) has a through portion extending in the longitudinal direction for receiving the guide section (10) of the track (1), wherein, to ensure the guided movement of the first component relative to the second component in the longitudinal direction, the guide section (10) is arranged inside the through portion of the slider (2), such that the guide section is surrounded by the inside of the through portion when the position of the slider (2) is determined to be perpendicular to the longitudinal direction. The feature is that a wooden rod is used as the guide section (10), especially as the entire track (1), and the inner side of the guide part is made of sliding plastic, especially of friction polymer, and the guide part abuts against the guide section (10) with the inner side of the guide part when the first member moves in the longitudinal direction relative to the second member.

15. The application according to claim 14, Its features are, The sliding bearing assembly is used to guide the first member relative to the second member in a longitudinal direction over a travel segment of at least 5 km in the longitudinal direction, and / or to guide the first member relative to the second member in a longitudinal direction with a surface pressure of at least 0.1 MPa, especially at least 0.2 MPa, especially less than 1.5 MPa, acting perpendicular to the longitudinal direction between the guide section (10) and the inside of the guide portion.

16. An application of sliding plastic for realizing the inner side of the guide portion of a slider (2) and an application of a slider (2) for realizing a sliding bearing assembly, the sliding bearing assembly having the slider (2) and a track (1), the track having a longitudinally extending wooden rod as a guide section (10) of the track (1), wherein, In the operating state of the sliding bearing assembly, the slider (2) can slide and guide on the track (1) in the longitudinal direction, and the guide section (10) is arranged in the guide portion of the slider (2) and is surrounded by the inner side of the guide portion when the position of the slider (2) is determined to be perpendicular to the longitudinal direction.

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