• 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 load gripper (1) for engagement with a bore (6) in a load (2), wherein a plurality of expansion wedges (4 l are arranged around an expansion cone (4 l), which are displaced by axial relative displacement of the expansion cone (4). with respect to the axis (5) of the spreading] {egels (4) ra.dial are displaceable a.ußen and thus with the lateral surface of the bore (6) are clamped, wherein the expansion cone (4) via a connecting rod (9) with a Both end regions (10, 11) of the connecting rod (9) are of part-spherical design and abut on part spherical shell-shaped surfaces with the same spherical radius on that part to which they transmit force in the load case.
    公开号:AT518242A1
    申请号:T5/2016
    申请日:2016-01-11
    公开日:2017-08-15
    发明作者:
    申请人:Sihga GmbH；
    IPC主号:
    专利说明:

    description
    The invention relates to a load gripper for engagement with a bore in the load.
    By US 1048585 Ä is already 1912 a generic Lastgrei-fer for the. Engagement shown on a hole in the load. The load gripper has a central, frusto-conical expansion cone and a plurality of so-called expanding wedges, which are arranged around the circumference of the Spreizkegels next to each other. The radially outer surfaces of the expanding wedges are formed as toothed partial surfaces of a circular cylinder jacket surface. When the expanding cone is displaced parallel to its axis relative to the expanding wedges in the direction in which its small face is forward, the expanding wedges are pressed by the lateral surface of the expansion cone radially away from the axis of the expansion cone. The expansion cone is connected via a connecting rod, which extends away from the smaller end face of the expansion cone, with a Lastaufnahmeöse, ie a metallic part, which has a through hole for the passage of a rope, shackle, or load hook connected. For anchoring a load, the load gripper with the expansion cone and the expanding wedges is inserted into a hole in the load. With the help of a lever and an eyelet then the expansion cone is pulled slightly in the direction of the bore opening while the expansion wedges are supported, also to be moved to the opening of the hole. The resulting relative movement between the expansion cone and expanding wedges causes the expanding wedges are pressed radially outwardly with respect to the bore axis, to the lateral surface of the bore and jammed with this. For example, a crane can attack the eyelet and lift the load gripper together with the load. To release the load gripper from the load, the load must rest on a base. By pressure or impact on the eyelet of the expansion cone is moved into the hole in the load. The expanding wedges thus gain mobility radially inward in the bore. They thus solve the spread on the lateral surface of the bore. The load gripper he can be pulled out of the hole again.
    The connection between the frustoconical clamping wedge and the connecting rod is rigid. The connection between the connecting rod and the Lastaufnahmeöse is as a stop surface between a partial spherical outer surface and. the inside of a part ball shell surface executed, so that the load receiving eye relative to the connecting rod even under load. two axes is pivotable (overcoming friction). Despite this pivotability, the problem arises that when the eyelet engages a force which is not aligned parallel to the direction of the connecting rod (and thus parallel to the bore in the load), a bending moment is introduced into the connecting rod and , the expansion cone is rotated relative to the expansion wedges about an axis which is aligned normal to the axis of the expansion cone. Both the bending moment and the said rotation damage the bending rod, expanding cone, expanding wedges and load. These damages reduce the reliability, service life and permissible load of the load gripper.
    The object underlying the invention is to improve the well-known from the prior art load gripper for engagement with a hole in the load so that no damage occurs even if at the eyelet laterally, so normal to the orientation of the hole being pulled in the load. (This is particularly important when a plurality of such load grippers engage at a distance from one another, the individual load grippers are connected to a cable or a chain, and a crane acts on this traction means at a distance from the individual load grippers.)
    To solve the problem, it is proposed not only to form the connection between the connecting rod and load eye as a stop surface between a partial spherical outer surface and the inside of a part spherical shell surface, but also the connection between the connecting rod and expansion cone.
    According to a preferred refinement, the load gripper has a support part which, as intended, bears against the lateral surface of the bore in the load and forms a stop against movement of the connection region between connecting rod and load eye in the radial direction of the bore.
    1 shows an exemplary load gripper 1 according to the invention in a side partial sectional view on a load 2.
    The exemplary load gripper 1 according to the invention of FIG. 1 has a plurality of so-called expanding wedges 3, which are arranged in a row around a central circle-symmetrical spreading cone 4. With respect to the axis 5 of the expansion cone 4 radially outer lateral surfaces of the expanding wedges 3 are part ring ring surfaces about the axis 5 of the expanding cone 4. These surfaces are in use befindlichem load gripper 1 on the lateral surfaces of that bore 6, in which intended the load gripper 1 with the expanding cone 4 is inserted ahead until it rests with an end face of the annular support member 7 on the load 2.
    Spreader 4 and expanding wedges 3 abut each other on part-conical surfaces, wherein the axis of the (imaginary) cone is the axis 5 of the expanding cone 4 and the base of the cone is closer to the bottom of the bore 6 in the load 2 as the tip of the cone , Relative movement of the expanding cone 4 relative to the expanding wedges 3 for opening the bore 6 in the load 2 thus causes the expanding wedges 3 to be pressed radially away from the axis 5 of the expanding cone 4 and thus jammed with the wall of the bore 6.
    The expansion cone 4 is connected to the load receiving eye 8, at the through hole of a rope, a shackle or a crane hook can attack, tensile strength connected. About this tensile connection external forces are optionally applied to the Lastaufnahmeöse 8 forwarded by the Lastaufnahmeöse 8 to the expansion cone 4, so that so the Lastaufnahmeöse 8 can not be moved away from the Spreizkegel 4. The expanding cone 4 passes the force on the contact surfaces with the expanding wedges 3 to the expanding wedges 3. The expanding wedges 3 forward the force to the lateral surface of the bore 6 in the load 2 on.
    Of course, the tension-resistant connection between the lifting eye 8 and expansion cone 4 extends over the distance between these two parts, wherein the largest part of this distance is bridged by a connecting rod 9 which optionally transmits in its longitudinal direction tensile force between Lastaufnahmeöse 8 and 4 Spreizkegel.
    According to the invention, the tensile anchoring of the connecting rod 9 is carried out at both ends of the connecting rod 9 so that in each case one rigidly connected to the connecting rod 9 part spherical outer surface 10, 11 rests against a partial spherical shell surface with the same spherical radius.
    Thus, the connection between the connecting rod 9 and the parts connected to it is pivotable about three axes. It is thus achieved that regardless of the direction in which the load receiving eye 8 draws an external force, no bending moments are introduced into the connecting rod 9. Furthermore, it is achievable that regardless of the direction of the force on the Lastaufnahmeöse 8, the pairs of body surfaces at which pressure forces between the components connecting rod 9 and expanding cone 4 and 4 expansion cone and the expanding wedges 3 and connecting rod 9 and lifting ring 12 are always full abut each other so that it can not come to selectively destructive high surface pressures.
    The load gripper 1 shown has an annular support member 7, which is aligned coaxially to the axis 5 of the expansion cone 4, rests with mounted load gripper 1 with an end face on the edge of the bore 6 on the surface of the load 2 and with an annular collar 13 something in the bore 6 protrudes and abuts the outer edge region of the lateral surface of the bore 6. Since the support part 7 includes the lifting ring 12 connected to the load receiving eye 8, it limits the movement of the lifting ring can be moved radially to the axis 4, when strong radially aligned to the axis 4 forces on the load receiving eye. The support member 7 directs these forces over the collar 11 over a large area - and thus without destructive surface pressures - on the lateral surface of the bore 6 a.
    For reasons of manufacturability and mountability, it is advisable not monolithic form the connecting rod 9 with two part-spherical end portions 10, 11, but releasably connected to one of these end portions, typically via a secure screw connection.
    For reasons of good mountability and ease of handling, it is advantageous - as shown in FIG. 1 - not to form the load receiving eye 8 monolithically together with the lifting ring 12, which rests with a teilkugelschaligen surface at the upper part spherical end portion of the connecting rod 9. Instead, these two parts can be releasably connected to each other, for example, as shown by means of a mounting plate 14, and screws 15 which hold a widened annular lower edge region of the load receiving eye 8 in a circular cylindrical recess of the lifting ring 12. Advantageously, this depression is deeper than the thickness of the said edge region of the load-receiving eyelet 8, so that the load-receiving eyelet 8 can still be rotated relative to the lifting ring 12 even in the mounted state about the axis 4.
    权利要求:
    Claims (2)
    [1]
    claims
    1. load gripper (1) for engagement with a bore (6) in a load (2) around a spreader cone (4) around several expansion wedges (4) are arranged, which by axial relative displacement of the Spreizkegels (4) with respect to the .Achse (5) of the expansion cone (4) are displaceable radially outward and thereby with the lateral surface of the bore (6) can be clamped, wherein the expansion cone (4) via a connecting rod (9) with a load receiving eye (8) is connected tensile strength, wherein the the Lastaufnahmeöse (8) facing end portion (10) of the connecting rod (9) is formed partially spherical and only this part spherical end portion (10) with its part spherical outer surface with the load receiving eye (8) or a force transmitting connected to this part in contact, said part-spherical end portion (10) on the inside of a part spherical shell-shaped surface with the same spherical radius of the load receiving eye (8) or a force transmitting connected Part (12) rests, characterized in that also the expansion cone (4) facing end portion (11) of the connecting rod (9) is formed partially spherical and only this part spherical end portion (11) with its part-spherical outer surface with the expansion cone (4) or a with this, force transmitting connected part in contact, wherein the part-spherical end portion (11) on the inside of a part spherical shell-shaped surface with the same spherical radius of the expansion cone (4) or a force-transmitting connected part rests.
    [2]
    2. Load gripper according to claim 1, characterized in that it comprises an annular support part (7), which mounted on the load (2) load gripper (1) having an end face at the edge of the bore (6) on the surface of the load (2 ) on legbar .ist and thereby projects with an annular collar (13) into the bore (6) and abuts the lateral surface of the bore (6).
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    同族专利:
    公开号 | 公开日
    EP3192765B1|2018-08-22|
    AT518242B1|2018-03-15|
    PL3192765T3|2019-01-31|
    EP3192765A1|2017-07-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1048585A|1910-09-26|1912-12-31|Sears Roebuck & Co|Gripping device.|
    US3201166A|1963-02-04|1965-08-17|Gencarelli Inc|Device for lifting heavy articles|
    US3993341A|1975-01-14|1976-11-23|Bentley Charles A|Deck structure and connector for building construction|
    NZ592904A|2008-10-23|2014-06-27|Obelix Holdings Pty Ltd|A lifting device and method for concrete elements|DE102018100355B4|2018-01-09|2021-02-25|Josef Pfanzelt|Coupling device for connecting a lifting device to a load|
    AT524016B1|2020-11-02|2022-02-15|Sihga GmbH|Load gripper for engaging a hole in the load|
    法律状态:
    2021-09-15| MM01| Lapse because of not paying annual fees|Effective date: 20210111 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA5/2016A|AT518242B1|2016-01-11|2016-01-11|Load gripper for engaging a hole in the load|ATA5/2016A| AT518242B1|2016-01-11|2016-01-11|Load gripper for engaging a hole in the load|
    PL17000045T| PL3192765T3|2016-01-11|2017-01-11|Load clamp for engagement in a hole in the load|
    EP17000045.9A| EP3192765B1|2016-01-11|2017-01-11|Load clamp for engagement in a hole in the load|
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