• 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:
    A test adapter for testing the attachment of a connecting element (1) with head (5), in particular a ground bolt, wherein the test adapter comprises a base body (14), wherein on the base body (14) a torque can be applied, at least two on the base body (14) on pivot axes (4) pivotally mounted jaws (3) for Umgrei- fen of the head (5) with clamping portions (15) of the jaws (3), and on the base body (14) axially displaceable clamping sleeve (2), wherein by axial displacement of the Clamping sleeve (2) in a closing direction, the clamping portions (15) of the clamping jaws (3) are pivoted radially inwardly and a method for testing by means of such a test adapter.
    公开号:AT517884A2
    申请号:T50931/2016
    申请日:2016-10-17
    公开日:2017-05-15
    发明作者:DRAXLER Ivica；Spanner Gerhard
    申请人:Magna Steyr Fahrzeugtechnik Ag & Co Kg；
    IPC主号:
    专利说明:

    Test Fixtures
    Field of the invention
    The present invention relates to a test adapter for checking the attachment of a head-mounted fastener, such as a ground bolt, and a method of testing the attachment of a fastener to a component.
    State of the art
    For testing the attachment of a connecting body, such as a welding stud, to a component, for example a body component of a vehicle, it is known to use test devices which make it possible to check the torsional rigidity of the connection. For this purpose, a preferably predefined torque is imposed on the connecting body by means of the test device. If the connection does not withstand the loading by the test apparatus, the connector body can be replaced by a new, better fixed connector body, thus preventing failure of the component prior to its operation.
    DE 10 2009 036 691 Al already discloses a device for the non-destructive testing of workpieces with the application of a torque, with a test nut which can be interchangeably connected to a screwing tool and at least partially fixes the workpiece.
    An apparatus and a method for testing the attachment point of a stud having an external thread on torsional stiffness is known from DE 100 04 720 CI.
    Summary of the invention
    It is an object of the invention to provide a test adapter, which allows a reliable testing of the attachment of a connecting element with a head, in particular with hexagonal or octagonal head, on torsional rigidity. In this case, slippage of the test adapter on the head of the connecting element should be avoided. Furthermore, a reliable method for testing the attachment of a connecting element, in particular ground bolt, is to be specified on a component.
    The object is achieved by a test adapter for testing the attachment of a connecting element with a head, comprising a base body, wherein a torque is applied to the body, at least two pivotally mounted on the body pivot axes jaws for gripping the head with clamping portions of the jaws, and a axially displaceable clamping sleeve on the base body, wherein the clamping portions of the clamping jaws are pivoted radially inwardly by axial displacement of the clamping sleeve in a closing direction.
    According to the invention, a test adapter is used which has clamping sections on at least two, for example also three, four or more clamping jaws, for gripping around a head, in particular a hexagon or an octagon, of the element to be tested, namely the connecting element. The clamping portions can be moved by axial displacement of a clamping sleeve radially inwardly, to the hexagon or octagon of the connec tion elements. For this purpose, clamping sleeve and clamping jaws are shaped and arranged accordingly, so that the clamping jaws are pivoted by axial movement of the clamping sleeve. Through this design of the test adapter, a reliable, backlash-free fit of the clamping sections can be achieved at the head, even if obstacles complicate the accessibility of the connecting element head.
    Therefore, such a test adapter also allows reliable testing of the attachment of a ground bolt to a component, even if over the head of the ground bolt an obstacle, such as a cable lug, the contacting of the head difficult, a good, play-free contacting of the head, however, to apply the required torque necessary is.
    Further developments of the invention are specified in the dependent claims, the description and the accompanying drawings.
    Preferably, the jaws and / or the clamping sleeve on a first cone geometry, so that by axial displacement of the clamping sleeve in the closing direction, the clamping portions of the jaws are pivoted radially inwardly.
    The main body of the test adapter preferably has a substantially cylindrical shape.
    Preferably, the clamping portions together embrace substantially a whole circumference and thus the entire circumference of the head of the connecting element, thus substantially comprise approximately 360 degrees. For this purpose, the individual clamping sections and particularly preferably also the entire clamping jaws preferably each have a cross section of a circular ring segment.
    Preferably, the inner edges of the clamping portions are adapted to the shape of an intended head of a connecting element, thus also have edges for hexagons or octagonal heads and preferably also at least corners, so transitions between the edges on.
    Preferably, the clamping portions are formed so that when concerns the clamping portions of an intended head size of the test element to be tested in each case a radially extending tolerance gap between the individual clamping sections remains, so that a firmer, in particular a play-free gripping the head by means of the clamping sections not by contact the Clamping sections are prevented from each other.
    Particularly preferably, the clamping portions are formed so that in each case two radial tolerance gaps lie opposite each other such that the imaginary connecting line of the tolerance column intersects the common center of all clamping sections, and thus the center of a connecting element arranged between the clamping sections. Furthermore, the clamping sections are preferably also designed such that the tolerance gaps for connecting elements with heads have the edges, in particular for hexagonal or octagonal heads, each coming to rest at the corners of the head, ie at the transitions of an edge to a next edge. It is particularly advantageous if two or in each case two radial tolerance gaps are formed at corners of the head of a connecting element and are opposite such that the imaginary connecting line of the tolerance column intersects the common center of all clamping sections, and thus the center of a connecting element arranged between the clamping sections. By these measures, a play-free fit of the clamping jaws on the connecting element, when closing the jaws, is achieved on as many as possible, in particular on all edges of a connecting element head.
    Preferably, the clamping portions each form a radially inwardly projecting board of the jaws, so protrude from the jaws. Thus, by the clamping portions a head of a connecting element can be achieved well even if axially above the head a protruding element with a larger diameter is arranged on or above the connecting element, for example a cable lug.
    Preferably, the clamping portions are formed on the pivot axis of the jaws on the main body opposite end of the jaws.
    The clamping jaws and / or the clamping sleeve preferably have a second cone geometry that is distinguishable from the first cone geometry, so that the clamping jaws are also pivoted radially inward by the second cone geometry by axial displacement of the clamping sleeve in the region of the second cone geometry. The second cone geometry may be distinguishable from the first cone geometry in particular in that the second cone geometry is more conical than the first cone geometry or the two cone geometries are separated from the first cone geometry by another geometry, for example by a straight, cylindrical profile of the contour. In this way, at different displacement distances of the clamping sleeve with respect to the jaws, a different degrees of delivery of the clamping portions to the head of the connecting element can be achieved.
    Preferably, the axial displacement of the clamping sleeve is predetermined on the base body by a slotted guide. The axial displacement is preferably represented by a bolt in a gate, wherein the bolt on the base body and the slide in the clamping sleeve, or vice versa, may be formed.
    The link guide may comprise a link which extends substantially axially and preferably merges at its end facing away from the clamping portions in a diagonal. By such a diagonal slotted section, one, for example, lower, axial displacement can be achieved by rotation of the clamping sleeve relative to the main body. Such a displacement of the bolt in a diagonal backdrop may be particularly useful in the region of a second cone geometry, in which the fine delivery of the clamping areas can be made to the head.
    Preferably, the base body is formed so that the torque can be applied to the body by means of a torque wrench, in particular by a hexagonal or octagonal profile which is non-rotatable with the body. The torque wrench can then be placed on this hexagon or octagon. Alternatively, a torque wrench, or even another torque-applying device, for example, directly, in particular in one piece, pass into the test adapter.
    Particularly preferably, the test adapter also comprises at least one spring element which biases the jaws radially outward, in particular at least one with their ends attached to the jaws compression spring through which pressed apart the jaws who the. As a result, the jaws can be easily reopened after testing.
    An inventive method for testing the attachment of a ground bolt to a component, can be carried out by means of a test adapter according to the invention. In this case, a head of the ground bolt is gripped by the clamping portions of the test adapter by attaching the test adapter and at least partially axial displacement of the clamping sleeve in the closing direction. Then, a predetermined torque is applied to the test adapter, preferably by means of a torque wrench. Thereafter, the clamping portions are opened by moving the clamping sleeve in the closing direction opposite direction again.
    Brief description of the drawings
    The invention will now be described by way of example with reference to the drawings.
    Fig. 1 is a schematic representation of a erfindungsge MAESSEN test adapter in the open state (right) together with a sectional view thereof in the closed state (left).
    Figs. 2 and 3 show steps in a method according to the invention for testing the attachment of a ground bolt.
    Fig. 4 shows a sectional view of the test adapter in closed senem state.
    Detailed description of the invention
    In FIG. 1, a test adapter according to the invention is shown together with a connecting element 1 to be tested, in particular a ground bolt, in the right-hand illustration in an opened state, edges which are not visible from the outside being shown as dashed lines, in a closed figure in the left-hand illustration State, in a sectional view.
    The test adapter has a cylindrical base body 14 and two clamping jaws 3 pivotally mounted on pivot axes 4 formed by guide pins. The test adapter further comprises an axially relative to the base body 14 and relative to the clamping jaws 3 slidable clamping sleeve 2. The jaws 3 have at their the connecting element 1 facing the end formed as a board clamping portions 15 which a bolt eight-Kant as the head 5 of the connecting element. 1 in the closed state of the jaws 3 engage around and a first cone geometry 16 of the jaws 3, which is formed so that the total diameter formed by the jaws 3 to the clamping portions 15 increases. An axial movement of the clamping sleeve 2 toward the clamping portions 15, in Fig. 1 down, therefore, leads to a radially inwardly acting pivoting of the jaws 3 and in particular the clamping portions 15 at the end of the jaws 3 and thus more or less already for clamping of the head 5, namely the eight-Kant of Verbindundungselements 1. The clamping sleeve 2 is guided over a guide pin chip sleeve 6 in a gate 17. The jaws 3 and the clamping sleeve 2 also have at their respective lower end second cone geometries 7, 8, namely further enlargements of the outer diameter of the jaws 3 and the inner diameter of the
    Clamping sleeve 2 down towards, for increased clamping of the head 5 in displacements of the clamping sleeve 2 relative to the jaws 3 in this axial section of the second cone geometries 7, 8th
    To attach a torque wrench 9 (see FIG. 3), the test adapter has an adapter hexagon 10. A compression spring 12 biases the two jaws 3 apart and thus before the open state. This movement of the jaws 3 is limited by an end stop jaws 13 which is formed as a bolt between the clamping portions 15 opposite ends of the jaws 3.
    FIGS. 2 and 3 show a method for testing the fastening of a connecting element 1 by means of a test adapter according to the invention. 4 shows a sectional view of the test adapter in a closed state, shortly before the state of the complete fixation of FIG. 3.
    The test adapter is placed over the welded-on connecting element 1, in particular a welding bolt (FIG. 1), wherein the clamping jaws 3 are opened, so that the clamping sections 15 can pass the protruding element 18, which has a larger diameter than the head 5.
    The clamping sleeve 2 is pushed down (Fig. 2), while the jaws 3, which are guided via guide pins 4, closed by means of first cone geometry 16, against the force of the compression spring 12 and include the eight-Kant head 5 of the connecting element. 1 (corresponds to state in Fig. 4). The clamping sleeve 2 is then rotated over the guide pin 6 in the diagonal portion of the link 17 in a clockwise direction, while the clamping sleeve 2 is further pushed down, where then the second cone geometry of the sleeve 7 meets the second cone geometry of the jaws 8. As a result, the jaws 3 are further compressed until the clamping portions 15 reach a tight fit on the connecting element 1 (corresponding state in Fig. 3).
    After the connecting element 1 is tightened, a torque wrench 9 is placed on the hex 10 of the adapter. The torque wrench 9 is rotated clockwise until the desired torque is reached. In this case, the welded connection between connecting element 1 and component 11 must not fail.
    The torque wrench 9 is then removed, the clamping sleeve 2 is rotated counterclockwise and pulled backwards. The compression spring 12 presses the jaws 3 apart from the end stop 13. This restores the initial situation for a next test.
    LIST OF REFERENCES 1 connecting element 2 clamping sleeve 3 clamping jaws 4 guide bolts clamping jaws 5 head, octagonal 6 guide bolts clamping sleeve 7 second cone geometry on clamping sleeve 8 second cone geometry on clamping jaws 9 torque wrench 10 adapter hex 11 component 12 spring 13 end stop jaws 14 Grand body 15 clamping portions 16 first cone geometry 17 Backdrop 18 protruding element
    权利要求:
    Claims (12)
    [1]
    claims
    1. Test adapter for testing the attachment of a connecting element (1) with head (5), wherein the test adapter comprises a base body (14), wherein on the base body (14) a torque can be applied, at least two on the base body (14) on pivot axes ( 4) pivotally mounted clamping jaws (3) for gripping the head (5) with clamping portions (15) of the clamping jaws (3), and on the base body (14) axially displaceable clamping sleeve (2), wherein by axial displacement of the clamping sleeve (2) in a closing direction, the clamping portions (15) of the clamping jaws (3) are pivoted radially inwardly.
    [2]
    2. Test adapter according to claim 1, characterized in that the clamping jaws (3) and / or the clamping sleeve (2) have a first cone geometry (16), so that by axial displacement of the clamping sleeve (2) in the closing direction, the clamping portions (15) the clamping jaws (3) are pivoted radially inwardly.
    [3]
    3. Test adapter according to at least one of the preceding claims, characterized in that the clamping portions (15) substantially encompass an entire circumference, ie an angle of 360 degrees.
    [4]
    4. test adapter according to at least one of the preceding claims, characterized in that the clamping portions (15) are formed so that when concerns the clamping portions (15) on a head (5) with a predefined diameter each have a radially extending tolerance gap between the individual clamping sections (15) persists.
    [5]
    5. test adapter according to at least one of the preceding claims, characterized in that the clamping portions (15) each form a radially inwardly projecting board of the clamping jaws (3).
    [6]
    6. test adapter according to at least one of the preceding claims, characterized in that the clamping portions (15) on which the pivot axis (4) of the clamping jaws (3) on the base body (14) opposite end of the clamping jaws (3) are formed.
    [7]
    7. Test adapter according to at least one of the preceding claims, characterized in that the clamping jaws (3) and / or the clamping sleeve (2) at its the clamping portions (15) facing the end of the first cone geometry (16) distinguishable second cone geometry (7, 8), so that by axial displacement of the clamping sleeve (2) in the closing direction, the clamping jaws (3) are pivoted radially inwards.
    [8]
    8. Test adapter according to at least one of the preceding claims, characterized in that the axial displacement of the clamping sleeve (2) on the base body (14) by a slotted guide (17) is predetermined.
    [9]
    9. test adapter according to claim 8, characterized in that the slotted guide (17) comprises a link which extends substantially axially and preferably, at its the clamping portions (15) facing away from the end, merges into a diagonal.
    [10]
    10. test adapter according to at least one of the preceding claims, characterized in that the base body (14) is formed so that the torque on the base body (14) by means of a torque wrench (9) can be applied, in particular by a hexagonal or eight- edge profile (10) which is non-rotatable with the base body (14).
    [11]
    11. Test adapter according to at least one of the preceding claims, characterized in that at least one spring element (12) biases the clamping jaws (3) radially outward.
    [12]
    12. A method for testing the attachment of a connecting element (1), for example a ground bolt, to a component (11) by means of a test adapter according to at least one of the preceding claims, wherein a head (5) of the ground bolt (1) of the clamping portions (15 ) of the test adapter, by attaching the test adapter and at least partially axial displacement of the clamping sleeve (2) in the closing direction, is embraced on the test adapter a predetermined torque is applied and then the clamping portions (15) by moving the clamping sleeve (2) in the closing direction opposite Direction to be reopened.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN112525409A|2020-10-29|2021-03-19|北京动力机械研究所|Online quick detection device of open bolt pretightning force|DE3210825A1|1981-08-05|1983-02-24|Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen|TENSION TEST AND RECEIVING DEVICE FOR A BOLT PROJECTING FROM A SURFACE|
    DE3840789A1|1987-12-10|1989-06-22|Volkswagen Ag|Test set for the quality of the connection between two components, especially a metal sheet and a welded bolt|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
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