• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a pivot bearing for the low-friction mounting of components, with a cylindrical bearing body (2, 2 '", 3) and a pivotally mounted therein bearing part (1) wherein the bearing body (2, 2"', 3) has a substantially radially arranged Rib (2 '"), on which at least one first rolling surface (2') is formed, and wherein the bearing part (1) has a rolling element (4) with a cylindrical rolling section at the tip, which is mounted on the rolling surface (2 '). According to the invention, the bearing part (1) has two sections, namely a holding part (1 ') and a connecting part (1' ') which are arranged on both sides of the rib (2' '').
    公开号:AT511205A4
    申请号:T9312011
    申请日:2011-06-24
    公开日:2012-10-15
    发明作者:Meinhard Schwaiger
    申请人:Iat 21 Innovative Aeronautics Technologies Gmbh；
    IPC主号:
    专利说明:

    • ** ♦ · 15585
    The invention relates to a pivot bearing for low-friction mounting of components, with a cylindrical bearing body and a pivotally mounted therein bearing part. In particular, a highly stressed pivot bearing is shown, preferably used at high radial loads such. As in centrifuges, with significantly reduced friction.
    Swivel bearings are used for the storage of machine elements which are exposed to a rotational movement about an axis of rotation and whose rotation angle does not have a full rotation of 360 °. This results in an oscillating movement about an axis of rotation, with a more or less constant tilt angle and a non-uniform rotational speed between zero and a positive and negative maximum value.
    Slide bearings are therefore not particularly well suited for such conditions of use, since due to the pivoting movement and the uneven relative speeds between the bearing pin and the bearing bore in the bearing gap, the structure of a hydrodynamic lubricant film is hardly possible. This leads to increased friction effects and accordingly to increased wear and low life. Centrifuges additionally produce a radially outward acceleration (centrifugal acceleration), which causes lubricant in cylindrical bearing bores to flow together in the edge region of the bearing bore farthest from the center of rotation and, in the absence of a suitable bearing seal, to be conveyed out of the bearing bore in the axial direction and through the centrifugal acceleration is propelled radially outward from the bearing bore rim. Thus, in addition to the increased Schmiermitteiaustritt from the bearing bore, the reduced remaining volume of lubricant in the sliding bearing in addition to the reduced or hardly existing hydrodynamic lubricating film as a disadvantage. Rolling bearings generally have a higher weight compared to sliding bearings (made of plastic) and an unfavorable distribution of lubricant at high centrifugal accelerations. This causes increased wear. Within the rolling bearing group, needle roller bearings have the most favorable conditions (weight, friction, etc.) for such applications. In such roller bearings are cylindrical rollers with a relation to the bearing diameter small Wälzkörperdurchmesser between the running surface of the outer ring and the φ * φ φ · φ φ * · * · · * * ······ φ φ # φ φ · Φ 1½ * · ν «· ΦΦΦ «φφφφφφφφφφφφφφφφφφφ
    Inner ring (usually the bearing pin) abgerolit. The bearing friction is formed from the rolling friction of the rolling element and the average radius of the running surfaces of the outer ring and the inner ring. Bearings have lower friction compared to plain bearings.
    Furthermore, flexible pivot bearings are known on the basis of elastically deformable thin-walled membranes made of plastic or metal, which are arranged crosswise. In US 3,807,029 A (Troeger H., 1974), US 3,811,665 A (Selig F., 1974), US 3,813,089 A (Troger H "1974) and US 3,825,992 A (Troeger H., 1974) pivot bearings are described, whose basic principle is based on crosswise arranged spring elements, wherein a cylindrical central body is inserted rotationally fixed in the bearing bore and a second cylindrical body relative to the first rotatably connected to the machine element to be stored; This creates a one-sided pivot bearing. In a second embodiment variant, two cylindrical hollow shafts rigidly connected to one another are connected by means of crosswise arranged diaphragms with respect to the center body inserted rotationally fixed in the bearing bore such that a torque or a rotational movement can be transmitted from one side part to the other. In this way, a rotational movement can be transmitted by the center body from one side to the opposite side. Such pivot bearings work without friction, however, have the disadvantage that only relatively small radial forces absorbed and only small tilt angle can be performed. Typical maximum swivel angles are approx. +/- 30 ° (with very low radial load) and at higher loads swivel angles of only a few ° can be executed. For this reason, find such elastic pivot bearings application where only small radial forces occur, such. B. in memory drives of computers, measuring devices u. like. Another elastic pivot bearing is known from US 5505555 A (Van Kann Frank J., Buckingham Michael J, 1996), which also has the aforementioned limitations and therefore only in special measuring instruments, such. As acceleration sensors, application finds.
    Object of the subject invention is to provide a heavy-duty swivel bearing for larger swivel angle available, with the disadvantages of highly stressed sliding layers in centrifuges, the disadvantages of rolling bearings and the disadvantages of elastic pivot bearings can be significantly reduced.
    According to the invention, these objects are achieved in that the bearing body has a substantially radially disposed rib on which at least one first rolling surface is formed and that the bearing part has a rolling body with a cylindrical rolling portion at the top, which rolls on the rolling surface. This means, in particular, that a rolling element is arranged to be rollable on a rigid rolling surface arranged approximately in the center axis of the pivot bearing, and this rolling element is an integral part of the pivotable bearing part. Typically, the rolling portion has a significantly smaller diameter than the bearing body of the pivot bearing. According to the invention, the pivoting movement is effected primarily by a rolling movement of the rolling element, so that sliding friction is largely avoided.
    An illegal game can be avoided in particular by the fact that the bearing part has a holding part, which has a substantially circular sector-shaped cross-section. It is essential to the circular sector-shaped cross-section of the holding part, that during the rolling movement the tagente of the holding part, which is parallel to the rolling surface, remains unchanged. When the rolling element has a non-circular cross-section, the cross-section of the holding part deviates from a circular sector-shaped configuration so that a "uniform thickness" is obtained. results, which in turn has a constant upper Tagente.
    In a particularly favored manner, it is provided that the bearing body has a substantially haibzylindrisch formed centering. The centering part is essentially fixed the degree of freedom of the bearing part.
    An impermissible movement of the bearing part is avoided in that the centering part has a rolling surface opposite the rolling surface. The bearing part is always during its movement on the sliding surface or is slightly removed from the sliding surface under load. In any case, this prevents an inadmissible play in all positions.
    Another particularly favorable embodiment provides that the centering part has centering surfaces in the region of the rib. The centering limits a possible lateral movement of the bearing part.
    A particularly compact embodiment of the pivot bearing is achieved when the bearing body on both sides of the rib each having a semi-cylindrical shell that holds the rib.
    The strength of the Schwenkiagers can be optimized in that the Lagerteii consists of two sections, namely a holding part and a connecting part, which are arranged on both sides of the rib.
    The kinematics of the pivot bearing is particularly advantageous when the Abrolifläche is sunk relative to the center of the pivot bearing. This means that the midpoint is outside the rib. Moreover, it is of particular advantage if the center of the rolling element has a distance from the center of the pivot bearing, which is smaller than the radius of the rolling body. Thus, when the rib is below the center of the pivot bearing, the center of the rolling element is located above this center.
    As a result, the invention will be explained in more detail with reference to the embodiments illustrated in FIGS.
    Flg. 1 is a general view of a pivot bearing, FIG. 2 is an axonometric view of the bearing of FIG. 1, FIG. 3 is an exploded view in an axial view, FIG. 4 is an axial view on an enlarged scale, FIG. 5 is an axonometric view of the pivot bearing of FIG 4, Fig. 6 is a view corresponding to FIG. 4 in a different position of the pivot bearing and Fig. 7 shows a detail of FIG .. 6
    Fig. 1 shows a pivot bearing configuration according to the invention in side view with the bearing bore in cross section. The pivot bearing configuration consists of the pivotable bearing element 1 which is inserted in a cylindrical bearing body 2, 2 "', 3, which is non-rotatably mounted in a bearing bore in a machine element 7, e.g. a centrifuge is arranged. The pivotable bearing part 1 is rotatable in the pivoting direction 5 with respect to the fixed cylindrical bearing body 2, 2 ", 3.
    Fig. 2 shows the pivot bearing configuration according to the invention in an oblique view with the preferred loading direction (6) and pivoting direction (5). * · «· * · · · Y · ··· * · ** · ····· · *» * · · φ φ φ φ · »*
    Fig. 3 shows the pivot bearing configuration according to the invention in an exploded view and sectional view along section line B-B of Fig. 1, the center part 3 is opposite the rib 2 '" and the holding part 2 positively connected in the installed state and is held together in the bearing bore. On the rib 2 '" is a rolling element 4, which is fixedly connected to the pivotable bearing part 1, unrolled in a pivoting movement.
    Fig. 4 shows the pivot bearing configuration according to the invention in the installed state in a sectional view like. In the bearing bore 7 'of the machine element 7, the cylindrical bearing body 2, 2' ", 3 is inserted rotationally fixed and the pivotable bearing part 1, which is fixedly connected to the rolling body 4, is moved in accordance with the pivoting movement 5 , wherein a rolling movement of the rolling element 4 on the rolling surface 2 'takes place. The pivotable bearing part 1 has over the length of the centering part 3 in the outer contour of the holding part 1 'as a "DC " executed contour, so that in a pivoting movement 5 of the pivotable bearing part 1 by means of the sliding surface 3 " is guided and held in the two end positions by means of Zentrierfiächen 3 'almost centered. Under load according to arrow 6 is the outer contour of the holding part 1 'of the pivotable bearing part 1 relative to the centering surface 3' released due to elastic deformation in the loading direction 6 and friction under relative movement. In order to achieve an approximately central pivotal movement, the rolling surface 2 'is opposite the bearing center by the amount 2 " added.
    The center Ml of the rolling element 4 has a distance di from the center M of the pivot bearing. This distance dx is smaller than the radius RI of the rolling element 4.
    Fig. 5 shows the pivot bearing according to the invention in an oblique view and in section along section line B-B of Fig. 1st
    Fig. 6 shows the pivot bearing according to the invention in a sectional view along section line B-B in Fig. 1 and the pan / Abroitvorgang. In a pivoting movement by the amount 5 'of the rolling elements 4 is unrolled on the rolling surface 2' and the center of the rolling element 4 is deflected by the amount 6 parallel to the rolling surface 2 '. Due to the relative to the pivot bearing diameter small diameter of the rolling element 4, the
    Ratio is ca, 1: 5 to 1:20, the deflection movement is also low and is about 0.5 to 5% of the pivot bearing diameter.
    FIG. 7 shows a detailed illustration of FIG. 6. The heat body 4 rolls on the rolling surface 2 'and has a radius RI 7 and a contact point 8.
    权利要求:
    Claims (9)
    [1]
    · # *** ·

    1. A plain bearing for the low-friction bearing of components, comprising a cylindrical bearing body (2, 2 ", 3) and a bearing part (1) pivotally mounted therein, characterized in that the bearing body (2, 2 '", 3) has a bearing body 2 '), on which at least one first rolling surface (2') is formed, and in that the bearing part (1) has a rolling element (4) with a cylindrical Roli section at the tip, which is mounted on the rolling surface (2). 2 ') rolls off.
    [2]
    Second pivot bearing according to claim 1, characterized in that the bearing part (1) has a holding part (1 ') which has a substantially circular sector-shaped cross-section.
    [3]
    3. pivot bearing according to one of claims 1 or 2, characterized in that the bearing body (2, 2 '", 3) has a substantially halbzylindrisch ausgebiideten centering part (3)
    [4]
    4. pivot bearing according to claim 3, characterized in that the centering part (3) one of the rolling surface (2 ') opposite sliding surface (3 ").
    [5]
    5. pivot bearing according to one of claims 3 or 4, characterized in that the centering part (3) in the region of the rib (2 "') centering surfaces (3').
    [6]
    A pivot bearing according to any one of claims 1 to 5, characterized in that the bearing body (2, 2 ", 3) has on both sides of the rib (2" ') a respective semi-cylindrical shell (2, 3) forming the rib (2 "; ') stops.
    [7]
    7. A pivot bearing according to one of claims 1 to 6, characterized in that the bearing part (1) consists of two sections, namely a holding part (Γ) and a connecting part (1 ") / on both sides of the rib (2" ') are arranged ,
    [8]
    8. pivot bearing according to one of claims 1 to 7, characterized in that the rolling surface (2 ') opposite the center (M) of the pivot bearing is sunk.
    [9]
    9. pivot bearing according to one of claims 1 to 8, characterized in that the center (Ml) of the rolling body (4) has a distance (di) from the center (M) of the pivot bearing, which is smaller than the radius (RI) of the rolling body (4). 2011 06 24 Ba / Pa

    A-1150 Vienna, Maris help belt 3t / 17 Tel- (+43 1) «92 89 fix: (+43 1) 692 f * 333 e-r.'dl: .fc.st Dipl-Ing. Mag. Michael Babeluk
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