Hybrid roller bearing optimized statically
By using two spaced-apart rollers and staggered sliding elements in the bearing assembly, combined with assembly channels and assembly bolts/sleeves, the wear and friction problems of existing bearings in the main load direction are solved, achieving low-friction, low-noise support and simplified installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- IGUS GMBH
- Filing Date
- 2022-04-08
- Publication Date
- 2026-05-29
AI Technical Summary
Existing bearings are prone to wear and friction in the main load direction, and the installation of multiple bearings is complicated, leading to undesirable large friction or excessive wear of the rollers, especially in the guide section where the orientation alignment between the bearing and the bearing is highly required.
Design a bearing assembly comprising two longitudinally spaced rollers and multiple sliding elements offset relative to the rollers, ensuring low-friction contact under forces perpendicular to the longitudinal and transverse directions through the combination of rollers and sliding elements, providing an assembly channel to allow bearing torsion, and fastening it to structural elements using assembly bolts or assembly bushings.
It achieves low friction and low noise support under heavy loads, extends bearing life, is suitable for static and dynamic load capacities from over 400 N to 1500 N, simplifies the installation process, and prevents guide section jamming.
Smart Images
Figure CN117769625B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a bearing, a bearing assembly having such a bearing, and applications of such a bearing. Background Technology
[0002] This type of bearing is used in longitudinally sliding support devices of working devices on rails, especially in lubricant-free support devices. Here, such bearings are based on a hybrid principle, in which the support device is based not only on rollers but also on sliding elements. Such bearings have a housing with a receiving channel extending longitudinally through the housing. Furthermore, such bearings have not only at least one roller but also at least one sliding element. The roller is rotatably supported in the housing about a roller axis extending perpendicular to the longitudinal direction. In the intended use of the bearing, a guide section of the rail, constructed in a columnar manner, is received in the receiving channel and rests against the running surface of the roller, and at least one sliding element surrounds the guide section in an angular range exceeding 200°, especially exceeding 220°. In intended use, the working device is arranged on the bearing such that the rollers transfer the main load to the guide section and roll along the guide section in the longitudinal direction as the bearing moves relative to the guide section. A sliding element is offset relative to the rollers in the longitudinal direction so that, under lateral loads (i.e., loads perpendicular to both the main load direction and the longitudinal direction) on the guide section relative to the track, the sliding element slides along the guide section due to this lateral load as the bearing moves longitudinally relative to the guide section. This type of bearing is particularly suitable for working devices that need to be moved manually in the longitudinal direction, such as in camera technology, machine tool doors, or signs, because such bearings, in their hybrid use, can, on the one hand, bear large loads along the track with very little friction, and on the other hand, the lateral forces generated during the particularly manual movement of the working device and thus the bearing are received by the sliding element used. Therefore, the movement of the working device, secured to the bearing, along the track can be carried without significant noise generation or significant friction.
[0003] In this type of bearing, the rollers and sliding elements are arranged in a coordinated manner within the guide section of the housing, such that when the bearing is loaded in the main load direction (i.e., loaded perpendicular to the roller shaft), the sliding elements rest against the guide section with the smallest possible contact surface. However, when loaded in the main load direction, such bearings are limited, partly by the materials of the housing and rollers, and partly by the material of the roller shafts when separate roller shafts are used (the separate roller shafts are fastened to the housing and the rollers are rotatably supported on the roller shafts). Under large loads in the main load direction, significant wear and, in particular, increased friction occur. Accordingly, such bearings can only be used in a predetermined manner up to the static load capacity and dynamic load capacity in the main load direction, both pre-defined by the manufacturer, whereby the dynamic load capacity is given based on the intended total running distance. In cases where the working device is longitudinally supported by bearings (whose loads exceed their static load capacity), multiple bearings are required: these bearings are arranged sequentially along the longitudinal direction and thus connected in parallel with respect to the main load direction, and thus collectively bear the load applied by the working device. However, it has proven problematic that such multiple bearings require complex installation to prevent undesirable large friction or excessive wear of the bearings (especially their rollers) between the guide section of the track and the bearings. This is because the bearings must be precisely aligned relative to each other with their longitudinal axes, and because each bearing explicitly defines the position of the guide section perpendicular to the longitudinal direction, each deviation in the orientation of the longitudinal axes of the different bearings results in an over-determined (überbestimmt) positioning of the bearing assembly on the guide section, accompanied by corresponding frictional losses or loads.
[0004] A bearing is known from US 4 714 354 A. Other prior art is known from the following publications: JP H05149334 A, US 2015 / 176643 A1, US 5 281 029 A and DE 32 24 282 A1. Summary of the Invention
[0005] The present invention is based on the objective of providing a bearing and / or bearing assembly and / or bearing application that at least partially eliminates at least one disadvantage of such bearings.
[0006] As a solution to the task forming the basis of this invention, the present invention proposes a bearing. The bearing according to the invention is suitable for guiding and supporting a cylindrical guide section of a track extending longitudinally along its column axis. The bearing is roller-based and sliding element-based, thus the support is provided not only on at least one roller but also on at least one sliding element. The bearing includes a housing having a guide portion extending through the housing along a longitudinal axis extending longitudinally. A receiving channel for receiving the guide section of the track is constructed in the guide portion. In the intended use of the bearing, the guide section is arranged in the receiving channel with its column axis aligned along the longitudinal axis of the guide portion. The receiving channel is closed at least partially, particularly at least 200°, particularly at least 220°, particularly at least 240°, particularly at least 260°, perpendicular to the longitudinal direction, preferably closed without interruption. This enclosure preferably exists at least 50%, particularly at least 80%, of the length of the guide portion extending along its longitudinal axis. The receiving channel is entirely located inside the guide portion. The receiving channel can be defined, for example, in sections by the guide section itself in its extension perpendicular to the longitudinal direction. In some embodiments, it is defined perpendicularly to the longitudinal direction by elements of the bearing arranged in the guide section (i.e., at least extending into the guide section), such as sliding elements and rollers arranged in the guide section. By the way the guide section extends longitudinally through the housing, the cylindrical guide section of the track can be arranged in the receiving channel (which is arranged in the guide section), and in such an arrangement of the guide section (the longitudinal extension length of the guide section is at least five times, especially at least ten times, the longitudinal extension length of the housing), the bearing can be displaced longitudinally along the guide section arranged in the receiving channel.
[0007] According to the proposed solution, the bearing has two longitudinally spaced rollers, each rotatably supported in a housing about a roller shaft extending perpendicular to the longitudinal direction, and a receiving channel is defined by the running surface of each roller in a transverse direction perpendicular to the roller shaft. Thus, each roller is supported in the housing such that it is rotatable about its corresponding roller shaft. This can be achieved, for example, by a support device placed on the periphery of the respective roller and thus on the running surface of the roller outside the receiving channel. However, this is preferably achieved by a roller shaft (extending through the center of the roller and rotatably supported on the roller shaft) firmly connected to or integrated into the housing, such that the running surface of the roller circumferentially surrounds the roller shaft. Each roller extends at least segmentally into the guide section with its running surface (i.e., its radial end), thereby defining the receiving channel in the guide section perpendicular to the longitudinal direction. When the bearing is used in a given manner, the cylindrical guide section is located in the receiving channel and abuts against the running surface of the roller. Accordingly, each roller limits the receiving channel in the lateral direction, which extends perpendicular to the corresponding roller axis and perpendicular to the longitudinal direction. Thus, each roller clearly corresponds to a lateral direction. Preferably, all rollers are equipped with the same lateral direction, so that the roller axes extend parallel. In some embodiments, the bearing can also have more than two rollers, for example, a first pair of rollers in a first position in the longitudinal direction and a second pair of rollers in a second position in the longitudinal direction, wherein the roller axes of each pair of rollers are inclined relative to each other at an angle about the longitudinal direction, so that when used in a given manner, the rollers abut against two circumferential sections of the guide section that are offset relative to each other at a corresponding angle about the longitudinal axis. In such embodiments, preferably, the roller axes of the corresponding rollers in each pair of rollers are oriented relatively parallel to each other. Preferably, the roller axes of a pair of rollers have an angle of less than 120°, especially less than 90°, about the longitudinal axis. Preferably, rollers or pairs of rollers are provided in the bearing at only two longitudinal positions, wherein these longitudinal positions are spaced apart from each other in the longitudinal direction as explained. Furthermore, the housing has an assembly channel extending through the housing perpendicular to the longitudinal direction along the assembly axis between the rollers or between the rollers at the positions mentioned in the longitudinal direction. Therefore, the assembly axis extends in a transverse direction perpendicular to the longitudinal direction. The assembly channel is suitable for receiving preferably cylindrical assembly bolts, such that the assembly bolts are arranged in the assembly channel, extend through the housing along the assembly axis, and are rotatable about the assembly axis in the receiving portion, but are fixed in their longitudinal positions by the assembly channel. Naturally, an assembly sleeve can also be arranged in the assembly channel instead of the assembly bolt, or an assembly sleeve can be arranged in the assembly channel, in which the assembly bolt is arranged.Here, the mounting sleeve is received accordingly in the mounting channel, extending through the housing along the mounting axis and rotatably supported about the mounting axis, yet fixed in its position longitudinally by the mounting channel. Furthermore, a plurality of sliding elements spaced apart longitudinally and offset relative to the rollers are arranged in the guide section, each sliding element defining the receiving channel with its side perpendicular to the longitudinal direction. By providing multiple sliding elements (arranged offset relative to the rollers in the longitudinal direction and defining the receiving channel), when the bearing is used, if the guide section is subjected to a force perpendicular to the longitudinal direction relative to the bearing, this force having a component of the rollers perpendicular to the lateral direction, the guide section can abut against at least one of the sliding elements. This also ensures, in this case, a low-noise and low-friction, longitudinally displaceable support for the guide section in the receiving channel, since the housing also abuts against the guide section only by at least one roller and at least one sliding element. This is generally advantageous according to the invention.
[0008] The bearing according to the invention offers numerous advantages. Through the combination of two longitudinally spaced rollers and a plurality of longitudinally spaced and offset sliding elements relative to the rollers, even under forces with components perpendicular to both the longitudinal and transverse directions, it is always possible to ensure the guide section maintains the lowest possible frictional contact with the bearing and prevent excessive wear, thereby achieving a long bearing service life. By arranging the two longitudinally spaced rollers, the two rollers can receive the load of the working device fastened to the bearing in the main load direction. The main load direction is preferably parallel to the transverse direction of the two longitudinally spaced rollers or parallel to the angle bisector of the transverse direction of the respective roller pair, provided that a pair of rollers is arranged at each longitudinal position. Thus, the bearing is also suitable for large loads, especially for static load capacities exceeding 400 N, particularly exceeding 700 N, and for dynamic load capacities exceeding 400 N, particularly exceeding 700 N, over a total running distance of 10 km, wherein the load capacity is adapted to the load along the main load direction. By providing mounting channels between the rollers in the longitudinal direction (in which mounting bolts and / or mounting sleeves can be rotatably supported), the bearing can be fastened to the structural element by such mounting bolts or mounting sleeves and can torsion about the bolts or sleeves when forces (having components perpendicular to the main load direction and perpendicular to the longitudinal direction) act between the guide section of the track and the bearing, while the guide section rests against at least one roller and at least one sliding element. Therefore, it is possible to prevent the guide section from jamming in the bearing. This is particularly advantageous when using two bearings spaced apart in the longitudinal direction, because these bearings can also rotate relative to each other when their longitudinal axes of the guide portions are not perfectly aligned, by torsion about their respective mounting bolts or their respective mounting sleeves, thus also preventing the guide section from jamming relative to the bearing in such use. Therefore, the present invention also relates particularly to the use of two longitudinally spaced bearings as a bearing assembly, by which a force preferably at least 800 N, especially at least 1000 N, especially at least 1500 N, is slidably borne in the longitudinal direction on a track. Generally preferably, the running surfaces of the two longitudinally spaced rollers abut against the same straight line, which extends parallel to the longitudinal axis of the guide portion and limits the receiving channel in a direction perpendicular to the longitudinal direction. Preferably, the sliding element extends in an arc segment with its cross-section perpendicular to the longitudinal direction, the longitudinal axis of the guide portion extending through the center of the arc segment. The arc segment is preferably closed around the longitudinal axis in an angular range of at least 200°, especially at least 220°, especially at least 240°, especially at least 260°.
[0009] Generally, preferably, the bearing has a mounting sleeve rotatably supported in an assembly channel. The mounting sleeve is preferably cylindrical in construction and extends along the assembly axis with its cylindrical axis. Preferably, the mounting sleeve is arranged in the assembly channel such that it has a clearance of less than 0.5 mm, particularly less than 0.2 mm, in the longitudinal direction. Preferably, the mounting sleeve protrudes beyond the housing on at least one side along the assembly axis. This allows the mounting sleeve to be fixedly positioned at its ends to the structural element without restricting the torsional flexibility of the housing relative to the mounting sleeve.
[0010] Preferably, the housing has first and second housing members arranged side-by-side along an assembly axis and detachably fixed to each other. The two housing members together form an assembly channel and / or a through-hole. The manufacture and assembly of the bearing according to the invention are particularly simplified by providing two detachably interconnected housing members.
[0011] Particularly preferably, the mounting channel is longitudinally spaced equidistant from the two longitudinal positions of the two rollers or roller pairs arranged opposite each other in the longitudinal direction. This provides a particular advantage: under force loads perpendicular to both the longitudinal and transverse directions of the rollers, the bearing can be uniformly torsioned by means of a mounting sleeve or mounting bolt arranged in the mounting channel. Preferably, both the mounting axis and the roller shaft extend perpendicular to the longitudinal axis, wherein the mounting axis is longitudinally spaced equidistant from the two roller shafts respectively. Particularly preferably, the mounting channel is arranged on the same side of the receiving channel as the roller shaft. Naturally, the roller shaft and the mounting channel are arranged outside the receiving channel with respect to a direction perpendicular to the longitudinal direction, preferably on the same side of the receiving channel with respect to that direction. Preferably, at least one sliding element is arranged in each of the respective longitudinal end sections of the guide section. The guide section has two longitudinal end sections opposed in the longitudinal direction. Each longitudinal end segment extends from its corresponding absolute longitudinal end of the guide portion at a maximum of 30%, particularly a maximum of 20%, particularly a maximum of 10% of the longitudinal extension length of the guide portion. Preferably, the corresponding sliding element is arranged only inside the corresponding longitudinal end segment. Preferably, the assembly channel or assembly axis is spaced equidistantly from the two sliding elements arranged in the two longitudinal end segments of the guide portion along the longitudinal direction. Preferably, the corresponding sliding element arranged in the corresponding longitudinal end segment is closer to the absolute longitudinal end of the housing corresponding to the sliding element than the roller closest to the sliding element in the longitudinal direction. Preferably, the sliding elements arranged in the longitudinal end segments are spaced at the same distance in the longitudinal direction as the rollers closest to them in the longitudinal direction.
[0012] Particularly preferably, the running surface of the roller has a concave profile facing the receiving channel. Due to this concave profile, the roller can particularly advantageously abut against the guide section and is especially helpful in further guiding the guide section. Particularly preferably, the profile has a cross-section perpendicular to the longitudinal direction, constructed in a spherical section configuration. This is particularly advantageous when the guide section is configured as a cylinder with a circular or elliptical cross-section.
[0013] In one embodiment, the assembly sleeve has a radially protruding portion, particularly a flange-like structure, on its outer side. This protrusion extends radially and thus perpendicular to the assembly axis. The protrusion is arranged in a radially widened portion of the assembly channel, which is confined within the housing on both sides along the assembly axis. Preferably, the assembly channel is constructed in a cylindrical manner, with the radially widened portion. Due to the confinement of the radially widened portion on both sides, the radially widened portion forms a stop for the protrusion, which fixes the position of the protrusion relative to the assembly axis. Thus, the arrangement of the protrusion in the radially widened portion of the assembly channel fixes the position of the assembly sleeve relative to the housing along the assembly axis. Particularly preferably, the radially widened portion of the assembly channel is constructed from the lateral ends of two housing members facing each other along the assembly axis. Thus, the radially widened portion is constructed jointly by two housing members. The lateral ends refer to the ends of the housing members that point towards each other along the assembly axis and are particularly abutting each other. Constructing the radially widened portion by two housing members is particularly advantageous for the manufacturability of the bearing. Particularly preferably, a first sliding member, particularly hollow cylindrical in shape, is provided in the assembly channel between the housing and the assembly bushing. The sliding member ensures low-friction torsionability of the assembly bushing relative to the housing. Preferably, the first sliding member has a first sliding member protrusion, which is arranged in a first section of the radially widened portion of the assembly channel to fix the position of the first sliding member relative to the housing along the assembly axis. Preferably, a second sliding member is provided in the assembly channel, offset from the first sliding member along the assembly axis. The second sliding member preferably has a second sliding member protrusion, which is arranged in a second section of the radially widened portion of the assembly channel to fix the position of the second sliding member relative to the housing along the assembly axis. Preferably, the protrusion of the assembly bushing abuts against the first sliding member protrusion on a first side and against the second sliding member protrusion on a second side opposite to the first side along the assembly axis. Preferably, the radially widened portion is a through-type radially widened portion along the assembly axis, wherein two sliding member protrusions and the protrusion of the assembly bushing are arranged in the radially widened portion. Preferably, the mounting bushing rests against the housing only via at least one sliding member and therefore not directly. Particularly preferably, the first sliding member is arranged only in a first section of the assembly channel constructed from the first housing member. Particularly preferably, the second sliding member is arranged only in a second section of the assembly channel constructed from the second housing member. Preferably, the assembly channel consists of two sections.
[0014] Generally, preferably, the sliding element surrounds the longitudinal axis of the guide portion with an enclosure angle of at least 220°, particularly at least 240°, particularly at least 260°. Generally, preferably, the guide portion completely surrounds the longitudinal axis in an angular range of at least 220°, particularly at least 240°, particularly at least 260°, perpendicular to the longitudinal direction. Particularly preferably, the guide portion has an opening extending longitudinally on one side perpendicular to the longitudinal direction. Preferably, the sliding element has an opening extending longitudinally aligned with the opening of the guide portion. The openings provided in the guide portion and especially in the sliding element allow the bridging portion (through which the cylindrical guide section of the track is attached to the track body) to slide through the openings, while the bearing slides along the longitudinal direction on the guide section of the track.
[0015] Generally, preferably, the sliding element has a groove extending in the longitudinal direction. This prevents increased friction due to contamination and advantageously keeps the contact surface (through which the sliding element rests against the guide section) small. Generally, preferably, the roller shaft extends parallel to the assembly axis. Generally, preferably, the sliding element is made of a friction polymer. Preferably, the sliding element is made of a friction polymer. Such a friction polymer is a polymer optimized for reducing wear and friction. Typically, such a friction polymer has a base polymer, such as thermoplastics like polyethylene, polypropylene, polyacetal, polycarbonate, polyamide, polyvinyl chloride, polytetrafluoroethylene, and, in the case of thermosetting materials, phenolic resin. Finely ground solid lubricants (e.g., molybdenum disulfide or graphite) and / or fillers (e.g., plastic fibers or textile fibers or plastic granules or textile granules) are added to the base polymer. Preferably, the housing is made of metal or a metal alloy, especially by die casting. Preferably, the housing and thus the through-hole have an extension of at least 6 cm in the longitudinal direction, especially between 6 cm and 15 cm. Preferably, the roller has a diameter of 10 mm to 30 mm, particularly 15 mm to 25 mm. Preferably, the roller is made of plastic. Preferably, the roller shaft is manufactured as a separate pin element fixed in the housing, and is particularly preferably made of metal or a metal alloy. Generally, the housing is preferably made of aluminum.
[0016] The present invention also relates to a bearing assembly having a bearing according to the invention and a track having a guide section constructed in a cylindrical manner. In the bearing assembly according to the invention, the guide section is longitudinally displaced within the guide portion of the bearing, particularly within a receiving channel located in the guide portion, and abuts against two rollers perpendicular to the longitudinal direction. Preferably, the guide section is spaced from the sliding element perpendicularly to the longitudinal direction by less than 1 mm, particularly less than 0.5 mm, particularly less than 0.2 mm. Particularly preferably, the track has a track body and a bridging portion connected to the track body, the bridging portion connecting to the guide section and thus connecting the guide section to the track body. Preferably, the bridging portion passes uninterruptedly along the longitudinal extension of the track in the longitudinal direction. Preferably, the guide section is constructed in a cylindrical manner with a circular or elliptical cross-section, with the bridging portion mounted on one side of the cylinder, the bridging portion connecting the guide section to the track body. Preferably, the track comprising the track body, the bridging portion, and the guide section is integrally manufactured, particularly from aluminum, particularly by extrusion. Particularly preferably, the bearing assembly includes another bearing according to the invention, thus comprising two bearings according to the invention, particularly exactly two bearings according to the invention. The bearings are arranged side-by-side in the longitudinal direction and preferably spaced apart from each other in the longitudinal direction. Guide sections of the track are arranged in the guide portions of the two bearings, particularly in the receiving channels, and the bearings are fastened to the structural element by means of mounting bolts and / or mounting sleeves arranged in their respective mounting channels. The structural element can be, for example, a machine component (e.g., a machine support frame) or part of a building (e.g., a wall).
[0017] The invention also relates to the application of bearings according to the invention, wherein mounting bolts and / or mounting sleeves are guided by channels and are fixed in position relative to the bearing housing (particularly in the longitudinal direction and / or in the transverse direction extending parallel to the mounting axis and / or in the direction perpendicular to the mounting axis and perpendicular to the longitudinal axis) and simultaneously rotatable about the mounting axis. Thus, the fixed position prevents translation relative to the housing, but does not prevent rotation. Preferably, mounting sleeves are arranged in the mounting channel, into which mounting bolts are inserted, the mounting bolts being fastened to both ends of the mounting sleeves, thereby fixing the mounting bolts and mounting sleeves in position and preventing rotation, while the housing is rotatably supported about the mounting sleeves. In the application according to the invention, the guide section of the track, constructed in a columnar manner, is guided into the receiving channel along the longitudinal direction, abutting against the rollers as the rollers rotate about their roller axes. Particularly preferably, the bearing is then displaced relative to the track in the longitudinal direction, wherein a force is applied between the bearing and the track, causing the bearing to rotate about the mounting bolts and / or about the mounting bushing, and a guide section is pressed against at least one of the sliding elements and slides longitudinally against said sliding element, while the guide section simultaneously abuts against at least one of the rollers and causes this roller to rotate about its roller axis. Preferably, the force has a force component in the longitudinal direction of the roller and a force component perpendicular to its transverse direction. Attached Figure Description
[0018] The invention will now be explained in more detail with reference to three figures and embodiments.
[0019] It shows:
[0020] include Figure 1a Figures 1b and 1c: Different views of one embodiment of the bearing assembly according to the invention in different schematic diagrams;
[0021] include Figure 2a and Figure 2b Figure 2: Different views of the components of the bearing assembly according to the invention, based on Figure 1, in different schematic diagrams;
[0022] Figure 3 : A bearing according to FIG1, a bearing assembly according to the invention, shown in a schematic exploded view. Detailed Implementation
[0023] Including Figure 1aFigures 1b and 1c illustrate different views of one embodiment of a bearing assembly according to the invention, using different schematic principles. The bearing assembly includes a bearing 1 and a track 6. The bearing 1 includes a first housing member 2 and a second housing member 3. The first and second housing members 2 and 3 together constitute the housing of the bearing 1. The housing has a guide portion extending through the housing along a longitudinal axis X extending in the longitudinal direction. A guide section 61 of the track 6, constructed in a columnar manner, is arranged in this guide portion, and the guide section is connected to the guide section 61 of the track 6 via a bridging portion. Figure 1b A top view along the longitudinal direction and from the perspective of... Figure 1cA cross-sectional view perpendicular to the longitudinal direction shows the guide section 61 received therein. The guide section surrounds the longitudinal axis X uninterruptedly over an angular range of approximately 260° perpendicular to the longitudinal direction. On one side perpendicular to the longitudinal direction, the guide section has an opening extending through the longitudinal direction, through which a bridging section extends, and the guide section 61 is connected to the track body 62 via the bridging section. This opening corresponds to an angular range in which the guide section does not surround the longitudinal axis X. The housing members 2 and 3 also form an assembly channel that extends along the assembly axis Y in a cylindrical manner. An assembly sleeve 4 is arranged in this assembly channel, which is fixed relative to the housing members 2 and 3 in position about the longitudinal direction by its arrangement in the assembly channel, but can be twisted relative to the housing members 2 and 3 about the assembly axis Y. The assembly sleeve 4 has a hollow cylindrical protective sleeve 42, on which a flange-like protrusion 41 is constructed around the radially outer side, which is generally advantageous according to the invention. The assembly channel has radially widened portions bounded on both sides along the assembly axis Y. A protrusion 41 of the assembly sleeve 4 is arranged in these radially widened portions, thereby fixing the assembly sleeve 4 relative to the housing members 2 and 3 in its position along the assembly axis Y. Furthermore, a first sliding member 24 and a second sliding member 34 are provided, each having a sliding member protrusion. The first and second sliding members engage with the radially widened portions of the assembly channel through these sliding member protrusions, thereby maintaining the sliding members 24 and 34 in a fixed position relative to the housing members 2 and 3 about the assembly axis Y. The radially widened portions of the assembly channel are radially widened portions extending along the assembly axis Y, and include not only the protrusion 41 of the assembly sleeve 4 but also the sliding member protrusions of the sliding members 24 and 34. The two housing members 2 and 3 each construct a section of the assembly channel and each constructs a section of the radially widened portion of the assembly channel at its lateral ends facing each other along the assembly axis Y. Housing components 2 and 3 are arranged side by side along the assembly axis Y and are releasably secured to each other by screws 5 at their lateral ends facing each other. Due to this construction, bearing 1 can be assembled particularly easily and is also particularly easy to maintain, for example, for replacing sliding components 24 and 34 or for replacing sliding element 7 located in the guide section, which abuts not only against the guide section 61 but also against the guide section.
[0024] Including Figure 2a and Figure 2b Figure 2 schematically illustrates different views of the components of the bearing assembly according to Figure 1, using different principles. Figure 2a The bearing assembly according to Figure 1 is shown without the second housing part 3. Figure 2b Showing perpendicular to Figure 2aThe image shows a view of section BB along the assembly axis Y of the component. Furthermore, in... Figure 3 The exploded view schematically shows bearing 1 of the bearing assembly according to Figure 1. In particular, from... Figure 2a Looking at 2b and 3 together, we can see the configuration and operating principle of bearing 1. Bearing 1 has two rollers 8, each rotatably supported in a housing about a roller shaft 9. The roller shafts 9 of the two rollers 8 extend parallel to the assembly axis Y and are received in blind holes in the two housing parts 2 and 3 respectively. In the illustrated embodiment, the roller shafts 9 are constructed as individual pin elements fixed in the housing. The two roller shafts 9 and thus the two rollers 8 are spaced equidistant from the assembly channel along the longitudinal axis X and are positioned on two different sides of the assembly channel and thus the assembly bushing 4 relative to the longitudinal direction. A sliding element 7 is provided at each longitudinal end section of the guide portion, which surrounds the longitudinal axis X with an encirclement angle of approximately 260°. Figure 2b In the established usage shown, the cylindrical guide section 61 of the track 6 abuts not only against the running surfaces of the two rollers 8 but also against the sliding element 7. This is generally advantageous according to the invention. The sliding element 7 and the rollers 8 are configured with receiving channels in the guide section in the transverse direction (which is perpendicular to the longitudinal axis X and the assembly axis Y), in which the guide section 61 is received. This transverse direction corresponds to the main load direction of the bearing 1, wherein the transverse direction is perpendicular to the roller shaft 9 and the assembly axis Y, which extend parallel to each other and perpendicular to the longitudinal axis X. This is generally advantageous according to the invention.
[0025] Furthermore, as seen in the accompanying drawings, the mounting sleeve 4 rests against the housing parts 2 and 3 only via the sliding elements 24 and 34, and thus not directly. This ensures that the mounting sleeve 4 has the lowest possible frictional torsion relative to the housing parts 2 and 3. Furthermore, the sliding element 7 and roller 8 ensure that the guide section 61 of the track in the bearing 1 has a particularly load-bearing and low-frictional support that can be displaced along the longitudinal axis X. The sliding elements 24 and 34 and the sliding element 7 are respectively made of friction polymer. Furthermore, from... Figure 2b and 3As can be seen, each of the two housing members 2 and 3 is respectively constructed with a common roller cavity for each of the rollers 8, and the corresponding roller 8 is received in said roller cavity. Each housing member 2 and 3 is constructed along the boundary of the corresponding roller cavity along the assembly axis Y, so that the roller 8 in the corresponding roller cavity is fixed in its position relative to the housing with respect to the assembly axis Y. Particularly preferably, and implemented in the present embodiment, more than 50%, preferably more than 70%, of the running surface of the roller 8 is received in the corresponding roller cavity and extends out of the corresponding roller cavity into the through-hole of the housing with its running surface. According to the invention, the arrangement of the corresponding roller cavities is generally advantageous.
[0026] List of reference numerals
[0027] 1 bearing
[0028] 2 First housing component
[0029] 3 Second housing component
[0030] 4. Assemble the bushing
[0031] 5 screws
[0032] 6 tracks
[0033] 7 Sliding element
[0034] 8 rollers
[0035] 9 roller shafts
[0036] 24 First Slider
[0037] 34 Second Slider
[0038] 41. Protrusion
[0039] 61 Guide Section
[0040] 62. Main track structure
[0041] X longitudinal axis
[0042] Y Assembly axis
Claims
1. A bearing (1) for longitudinally displaceable and guideably supporting a cylindrical guide section (61) of a track (6) extending longitudinally along its cylindrical axis, the bearing (1) comprising a housing having a through-hole extending through the housing along a longitudinal axis (X) extending in the longitudinal direction, wherein a receiving channel is configured in the through-hole for receiving the guide section (61) of the track (6). in, i) The bearing (1) has two rollers (8) spaced apart from each other in the longitudinal direction. The rollers are rotatably supported in the housing about roller shafts (9) extending perpendicular to the longitudinal direction, and the receiving channel is limited by the running surfaces of the rollers in the transverse direction extending perpendicular to the roller shafts (9). Its features are, ii) The housing has, in the longitudinal direction, an assembly channel extending through the housing perpendicular to the longitudinal direction along the assembly axis (Y) between the rollers (8), for rotatably receiving assembly bolts and / or assembly bushings about the assembly axis (Y), and iii) In the guide section, a plurality of sliding elements (7) are arranged spaced apart from each other in the longitudinal direction and staggered relative to the roller (8) in the longitudinal direction. The sliding elements define the receiving channel with their sides perpendicular to the longitudinal direction. At least one sliding element (7) is arranged in the longitudinal end section of the guide section and is arranged closer to the absolute longitudinal end of the housing associated with the sliding element than the roller (8) closest to the sliding element in the longitudinal direction.
2. The bearing (1) according to claim 1, Its features are, The bearing (1) has an assembly bushing (4) that is rotatably supported in the assembly channel.
3. The bearing (1) according to claim 2. Its features are, The assembly bushing protrudes beyond the housing on at least one side along the assembly axis (Y).
4. The bearing (1) according to claim 2. Its features are, The housing includes a first housing component and a second housing component (2, 3), which are arranged side by side along the assembly axis (Y) and can be loosely fixed to each other.
5. The bearing (1) according to any one of claims 1 to 4. Its features are, The assembly channel is longitudinally spaced from the two rollers (8) at the same distance.
6. The bearing (1) according to claim 5, Its features are, The assembly channel is arranged on the same side of the receiving channel as the roller shaft (9).
7. The bearing (1) according to claim 1, Its features are, The sliding elements (7) arranged in the longitudinal end section are spaced apart by the same distance in the longitudinal direction from the rollers (8) that are closest to them in the longitudinal direction.
8. The bearing (1) according to any one of claims 1 to 4. Its features are, The running surface of the roller (8) has a concave profile facing the receiving channel.
9. The bearing (1) according to claim 8. Its features are, The running surface of the roller (8) has a cross-section perpendicular to the longitudinal direction, constructed in a spherical segment manner.
10. The bearing (1) according to claim 4. Its features are, The assembly bushing (4) has a radial protrusion (41) on its outer side, the protrusion being arranged in a radially widened portion on both sides of the assembly channel along the assembly axis (Y) within the housing, for fixing the position of the assembly bushing (4) relative to the housing along the assembly axis (Y).
11. The bearing (1) according to claim 10. Its features are, The assembly bushing (4) has a flange-shaped protrusion (41) on its outer side.
12. The bearing (1) according to claim 10, Its features are, The widened portion of the assembly channel is formed by the lateral ends of the two housing parts (2, 3) facing each other along the assembly axis (Y).
13. The bearing (1) according to claim 10, Its features are, A first sliding member (24) is provided in the assembly channel between the housing and the assembly bushing (4).
14. The bearing (1) according to claim 12. Its features are, A hollow cylindrical first sliding member (24) is provided in the assembly channel between the housing and the assembly bushing (4).
15. The bearing (1) according to claim 13, Its features are, The first slider (24) has a first slider protrusion, which is arranged in a first section of the widened portion of the assembly channel for fixing the position of the first slider (24) relative to the housing along the assembly axis (Y).
16. The bearing (1) according to claim 13. Its features are, A second slider (34) is disposed in the assembly channel at a offset relative to the first slider (24) along the assembly axis (Y).
17. The bearing (1) according to claim 16. Its features are, The second slider has a second slider protrusion, which is arranged in the second section of the widened portion of the assembly channel for fixing the position of the second slider (34) relative to the housing along the assembly axis (Y).
18. The bearing (1) according to claim 16. Its features are, The first sliding member (24) is arranged in a first section of the assembly channel constructed of the first housing member (2), while the second sliding member (34) is arranged in a second section of the assembly channel constructed of the second housing member (3).
19. The bearing (1) according to any one of claims 1 to 4. Its features are, The sliding element (7) surrounds the longitudinal axis of the threaded portion with an enclosing angle of at least 220°.
20. The bearing (1) according to claim 19. Its features are, The sliding element (7) surrounds the longitudinal axis of the threaded portion with an encirclement angle of at least 240°.
21. The bearing (1) according to claim 19. Its features are, The running surfaces of the two rollers (8) spaced apart in the longitudinal direction are respectively abutted on the same straight line, which extends parallel to the longitudinal axis of the guide portion and limits the receiving channel in a direction perpendicular to the longitudinal direction. The sliding element extends in an arc segment with its cross-section perpendicular to the longitudinal direction (X), and the longitudinal axis (X) of the guide portion extends through the center of the arc segment.
22. The bearing (1) according to any one of claims 1 to 4. Its features are, The threaded portion completely surrounds the longitudinal axis (X) at an angle range of at least 220° perpendicular to the longitudinal direction and has an opening that extends through the longitudinal direction on one side perpendicular to the longitudinal direction.
23. The bearing (1) according to claim 22. Its features are, The threaded portion completely surrounds the longitudinal axis (X) within an angular range of at least 240° perpendicular to the longitudinal direction.
24. The bearing (1) according to any one of claims 1 to 4. Its features are, The sliding element (7) has a groove that extends in the longitudinal direction.
25. The bearing (1) according to any one of claims 1 to 4. Its features are, The roller shaft (9) extends parallel to the assembly axis (Y).
26. The bearing according to any one of claims 1 to 4, Its features are, The sliding element (7) is made of a friction polymer, and / or the housing is made of metal.
27. The bearing (1) according to claim 26. Its features are, The shell is made of a metal alloy.
28. The bearing (1) according to claim 26. Its features are, The shell is manufactured by die casting.
29. A bearing assembly comprising a bearing (1) according to any one of claims 1 to 28 and a track having a guide section (61) constructed in a columnar manner, wherein, The guide section (61) is arranged in the through part of the bearing (1) in a longitudinal direction and abuts against the two rollers (8) perpendicular to the longitudinal direction and is spaced less than 0.5 mm from the sliding element (7) perpendicular to the longitudinal direction.
30. The bearing assembly of claim 29, wherein, The guide section (61) is spaced less than 0.2 mm from the sliding element (7) perpendicular to the longitudinal direction.
31. The bearing assembly according to claim 29, comprising another bearing (1) according to any one of claims 1 to 28, wherein, The bearings (1) are arranged side by side in the longitudinal direction, and the guide section (61) is arranged in the through-parts of the two bearings (1), and the bearings (1) are fastened to a structural element by means of mounting bolts arranged in the corresponding mounting channels of the bearings and / or mounting sleeves (4) arranged in the corresponding mounting channels of the bearings.
32. An application of the bearing (1) according to any one of claims 1 to 28, wherein, The mounting bolts and / or mounting bushings (4) are guided through the mounting channel and fixed in position relative to the housing of the bearing (1) and rotatably fixed about the mounting axis, wherein the guide section (61) of the track, constructed in a columnar manner, is guided into the receiving channel along the longitudinal direction abutting against the roller (8) as the roller (8) rotates about the roller shaft (9).
33. The application according to claim 32, wherein, Next, the bearing (1) is displaced relative to the track along the longitudinal direction, and a force is applied between the bearing (1) and the track, causing the bearing (1) to rotate about the mounting bolt and / or the mounting bushing (4), and the guide section (61) is pressed against at least one of the sliding elements (7) and slides along the longitudinal direction against the sliding element, while the guide section simultaneously abuts against at least one of the rollers (8) and causes the at least one roller (8) to rotate about its roller axis (9).