Connection device for coupling a load to an ear by means of a carrier bolt

Abstract

In a connection device for coupling a load to an eye by means of a load bolt, the load bolt is positioned to rotate in a through-hole of a ring holder, the ring holder having a threaded shaft and a bolt head, the bolt head projecting radially beyond the threaded shaft and rotating with the bolt head relative to the eye with the coupled load, the ring holder being covered at the underside by an end flange of a lower end of a sleeve, the sleeve being releasably secured to the load bolt by means of an axial tension. At least one locking member for the bolt head is provided on the ring holder, the locking member blocking the rotation of the bolt head in a locked position and not engaging the bolt head in an initial position. The load bolt is supported in the through-hole of the ring holder by means of a ball bearing, and the eye is configured as an open ring, both end regions of the open ring being bent in a direction towards each other and in the assembled state extending radially at mutually opposite sides into recesses formed in the ring holder, and the recesses being open in a downward direction.

Description

TECHNICAL FIELD

[0001] The invention relates to a connection device for coupling a load to an eye by means of a load bearing bolt, wherein the load bearing bolt is positioned so as to be able to rotate in a through-hole of a ring holder about its longitudinal axis, the load bearing bolt having a threaded shaft and a bolt head, the bolt head projecting radially beyond the threaded shaft and also being able to rotate with the coupled load relative to the eye. BACKGROUND

[0002] Such connection devices are known in many different arrangements and are also frequently used, in which a load bearing bolt having a threaded shaft in order to couple a load to be received is guided through a through-hole of a connection part, which is fitted to or connectable to an eye.

[0003] EP 2646698 B1 thus describes such a connection device in the form of a ring screw, in which a through-hole for the load bearing bolt is provided in a connection part, which itself is formed on the eye, and on the upper side of which the bolt head of the load bearing bolt bears with its underside on an abutment face of the connection part, which extends around the through-hole. In this case, at least one locking member is provided, which can be brought into engagement or out of engagement with the bolt head and, in the locked position, blocks the rotation of the bolt head, while in another position it releases the bolt head. Due to these locking members, it is no longer necessary to use a separate tool in order to actuate the locking members, so that a very space-saving arrangement can be achieved, so that this known connection device can also be used when only a small space is available. In this case, due to the locking members, a relatively large torque can also be transmitted by the eye in the rotation direction of the load bearing bolt.

[0004] However, it is not possible with this known connection device to hang a closed sling (for example, a cable loop, a fabric loop, etc.) in the eye. Furthermore, in this known ring screw, the orientation of the load bearing bolt in the load direction cannot be achieved with the rotation of the bolt head being blocked by at least one locking member, which is located in its locked position, so that the ring screw potentially cannot be screwed in completely or can even be unscrewed in its use.

[0005] In other known connection devices (US 7114872 B2, EP 0462963 B1) eyelets in the form of split rings are used on the side of the through hole, the end regions of which are oriented towards one another and which are always engaged in an opening in a ring holder, in which an opening is formed for the bearing bolt. In these arrangements, by removing the ring holder and the bearing bolt, the eyelets in the form of split rings can be exposed in order to hang the closing sling and subsequently reassemble the entire arrangement completed. However, in this case, these known connection devices have a relatively complex overall construction, so that the construction and installation of the ring holder with the bearing bolt is extremely complex and difficult and thus expensive.

[0006] In these connection devices, when the load is mounted on the bearing bolt, by using components that can be rotated relative to one another, the device of the bearing bolt assembled in the ring holder is constructed in such a way that the bearing bolt can be rotated about its central axis relative to the eyelet even with a screwed load and thus enables the orientation of the bearing bolt in the load direction, which arrangement is held on the eyelet. However, in this case, when heavy loads are coupled to the bearing bolt in the case of an orienting movement, significant friction forces can occur between the components that slide relative to one another, which involves the risk of undesirable wear. When a torque acts on the bearing bolt opposite to the screwing-in movement of the bearing bolt, in certain cases, this can also cause the bearing bolt to rotate even in the unscrewing direction.

[0007] A connection device of the type mentioned in the introduction is known from DE 43 36 779 A1. In this connection device, the head of the bearing bolt is located in a recess of a ring holder, which itself is rotatably supported on a connection component via which the bearing bolt is pivotably articulated to the eyelet. In this case, the ring holder is connected to the connection component in the region above the axial direction of the head of the bolt by means of a ball bearing. In the case of a suspended load, the orientation of the bearing bolt in the load direction can be achieved by the relative rotatability of the ring holder relative to the connection component. Therein, the occurring friction forces are only relatively low. However, in this known connection device, the assembly on the load to be received cannot be carried out without a tool, since for this purpose a form-locking connection between the head of the bolt and the connection component must be produced during the screwing-in operation. Furthermore, the installation of the closing sling is also not possible. SUMMARY

[0008] On the basis of this situation, the present invention develops a connection device, which enables in particular a tool-free assembly on the load to be received with a particularly simple construction and the installation of the closing sling in a simple and quick manner.

[0009] To this end, by means of a connection device of the type mentioned in the introduction, it is provided that: - the ring holder is designed as a split ring,

[0010] - the ring holder is covered on its lower side by an end flange which projects radially at the lower end of the sleeve, which can rotate around the load bolt and is releasably fixed to the load bolt by tension in the axial direction;

[0011] - at least one locking member is provided on the ring holder, which can engage with the bolt head and can be moved into a locking position and into an initial position, wherein the locking member blocks the rotation of the bolt head relative to the ring holder in the locking position and does not engage with the bolt head in the initial position;

[0012] - the load bolt is supported in the through-hole of the ring holder by a ball bearing; and

[0013] - the lugs are configured as open rings, the two end regions of which always extend in a direction towards each other and in the assembled state radially at mutually opposite sides into recesses which are formed on the lower side of the ring holder and which are always open in a downward direction.

[0014] The connection device according to the application initially has a relatively simple configuration which makes it possible to quickly remove the ring holder with the load bolt and the locking member from the two end regions of the lugs.

[0015] In the assembled state, the connection device according to the application forms a closed unit even when it is not coupled to any load intended to be received, wherein the lower side of the ring holder is radially covered by the radially projecting end flange of the sleeve which is releasably fixed to the load bolt and which can rotate around the load bolt. In this state, the two end regions of the lugs which are configured as open rings can be covered by the radially projecting end flange of the sleeve, so that they cannot escape downward from the recesses of these openings, which extend at mutually opposite sides into the recess formed in the ring holder and which is open in a downward direction.

[0016] However, if it is intended to hang a closed sling in the lugs, it is only necessary to pull the sleeve which is releasably fixed to the load bolt downward in the axial direction by tension and to remove the sleeve together with its end flange from the load bolt, whereby the open recesses in the ring holder which receive the end regions of the lugs are now open in the downward direction. In this state, the ring holder together with the load bolt can be pulled upward out of these end regions of the lugs and then also be removed.

[0017] In the remaining eye, having its opening portion between its two end regions, the required closed sling can now be introduced into the inner region of the surface enclosed by the eye, the loop holder can then be placed again on the end regions of the eye together with the load bolt having the two lower open recesses, and by then inserting the sleeve, wherein the radially protruding end flange of the sleeve is pushed from below against the load bolt until it is again (releasably) fixed in its assembled position on the load bolt, the initial assembled state of the entire connection device is again achieved, however, wherein the required closed sling is now hanging in the eye.

[0018] Due to the at least one locking member that can be engaged with the bolt head being fitted to the loop holder, which can be moved into a locking position and an initial position in which it is no longer engaged with the bolt head, and a separate tool is no longer required for actuating the loop holder, by rotating the eye for connecting the load to be received on the load bolt into its locking position, the connection device according to the application can be screwed through the receiving hole into the threaded hole cooperating with the load bolt or inserted into the threaded hole of the load bolt and can be tensioned on the free end of the load bolt against the load by means of a nut. In this case, a relatively large torque can also be introduced from the eye in the direction of rotation of the load bolt without difficulty.

[0019] Due to the use of a ball bearing to support the load bolt directly in the through-hole of the loop holder, a very easy rotation of the load bolt in the loop holder and thus an easy orientation of the load bolt in the direction of the load in the case of a suspended load can be achieved when the rotation of the load bolt in the through-hole is not blocked by the at least one locking member.

[0020] When the at least one locking member is configured on the loop holder, in a very particularly preferred manner, the locking member is configured as a tilting lever that can be easily tilted manually by the operator.

[0021] The configuration of the load bolt can be implemented in any appropriate manner, however, wherein the bolt head is configured in a particularly preferred manner as a hexagonal form when viewed from above.

[0022] The load bolt is also preferably supported in the through-hole of the loop holder in the region between the underside of its bolt head and the starting portion of its threaded shaft by means of a ball bearing. In this case, the load bolt is advantageously provided with a guide groove in which the balls of the ball bearing run.

[0023] A particularly preferred embodiment of the connection device according to the application also relates to a clamping ring inserted for fixing between a carrier bolt and a sleeve which can be released in the axial direction by means of a tension force, for connecting between the carrier bolt and the sleeve, which clamping ring, when the sleeve is fitted axially onto a shaft and when the sleeve is removed axially from the shaft, extends in a circumferential receiving groove arranged for the clamping ring on the inside of the sleeve, respectively, by means of an inclined starting member fitted to the shaft of the carrier bolt at this location on a radial flange of the shaft, whereby the clamping ring can be guided away via the radial flange on the shaft of the carrier bolt in the subsequent relative axial movement between the sleeve and the carrier bolt until the clamping ring reaches a fixed position behind the radial flange or in order to release the fixed position in the case of an axial tensile force. In this case, the axial tensile forces to be used are very small, so that they can usually be applied manually without any problems.

[0024] The application provides a connection device and which allows the carrier bolt to be easily oriented in the load direction in the case of a suspended load with a very surprising simple construction. Furthermore, the carrier bolt on the ring holder can be blocked in the rotational direction via the bolt head without the use of a tool, wherein, as a result of the use of at least one locking member, a relatively large torque can be transmitted to the carrier bolt via the eye.

[0025] The use of a sleeve which is fixed to the carrier bolt in the assembled state and which fixing to the carrier bolt can be released by a tension force in the axial direction and which sleeve covers the underside of the ring holder by means of an end flange protruding at its lower end allows a closed construction of the connection device according to the application to be achieved in the assembled state. In this case, the screwing-in of the threaded shaft of the carrier bolt in the corresponding receiving thread formed in the load intended to be received or the insertion of the carrier bolt through a through-hole in the load and the screwing-in of a retaining nut on the end region of the carrier bolt protruding at the opposite side of the load can be carried out directly via the rotational blocking of the carrier bolt in the locking position of the at least one locking member, without any tools having to be used in this case. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be explained in more detail below by way of example with reference to the drawings, in which:

[0027] Figure 1 is a perspective view of the connection device according to the application with two locking members for the head of the carrier bolt, which are not in the locking position;

[0028] Figure 2 is a cross-section through Figure 1 the connection device, wherein the cross-sectional plane lies in the clamping plane of the central axis of the eye;

[0029] Figure 3 is a cross-section according to the arrangement of the cross-sectional position A-A; Figure 2

[0030] Figure 4 is shown Figure 1 the connecting device according to

[0031] Figure 5 is an enlarged perspective view of the load bearing bolt, in which the sleeve is pulled axially downwards;

[0032] Figure 6 is an enlarged detail cut of the sleeve with the clamping ring when it is pushed axially onto the load bearing bolt before reaching the end position of the fixing;

[0033] Figure 7 is a cross-sectional view according to Figure 6 but in Figure 7 the sleeve has reached its end position of the assembly on the load bearing bolt.

[0034] In the following description of the drawings, embodiments of the connecting device according to the application are shown, wherein identical drawing references in different drawings always denote identical parts. DETAILED DESCRIPTION

[0035] Figure 1 is a perspective side view of the connecting device 1 according to the application in the assembled state and Figure 2 shows a cross-section through this connecting device 1 in Figure 1 , wherein the cross-sectional plane extends parallel to the clamping plane of the lug 2 and through the rotation axis of the load bearing bolt.

[0036] Finally, Figure 3 shows a further cross-section along the cross-sectional position A-A according to Figure 2 .

[0037] As can be seen in particular in the cross-section of Figure 2 , the lug 2, with which the entire connecting device 1 with the coupled load 10 can be connected to a suitable lifting device, is configured in the form of an open ring.

[0038] The two end regions 3 of the lug 2, between which the ring-shaped position with the opening is positioned, are configured in such a way that both end regions are always bent in a direction towards each other by one of the two side members 2.1 or 2.2 of the lug 2, as in the cross-sections referred to Figure 2 (or also in Figure 4 ​are shown in detail in the illustrations of Figures 1 and 2. In the embodiment shown, the curvature of the end regions 3 extends from the respective side member 2.1 or 2.2 in such a way that these end regions 3 are positioned perpendicularly to the side members 2.1 and 2.2. In this case, the configuration of the end regions 3 is carried out in such a way that the end regions are located opposite the eye 2 with respect to the longitudinal axis of the eye 2. Figure 2 The longitudinal axis in the shown cross-sectional position A-A is oriented symmetrically.

[0039] The connection device 1 also comprises a ring holder 4, which on its underside has two downwardly open recesses 5 in diametrically opposite fashion to one another, into each of which in the assembled state one of the end regions 3 of the eyes 2 extends radially. In this respect, reference can be made in particular to the illustrations of Figures 3 and 4. Figure 2 and Figure 4 .

[0040] In this case, each of the recesses 5 is configured to be slightly larger in cross section than the cross section of the protruding end region 3 of the eye 2.

[0041] In the ring holder 4, there is also centrally provided an axial through-hole 15 extending through the ring holder, and the carrier bolt 6 is positioned in this through-hole so as to be able to rotate about its longitudinal axis.

[0042] The carrier bolt 6 has on the top a bolt head 7, and axially spaced therefrom a threaded shaft 8, which in the assembled state of the connection device 1 protrudes at the underside of the ring holder 4 by a predetermined length, as is shown in Figure 1 .

[0043] The bolt head 7 abuts inside the through-hole 15 with the unthreaded portion 13 of the carrier bolt 6, in which unthreaded portion the carrier bolt 6 is supported and held in the through-hole 15 of the ring holder 4 by means of a ball bearing 9.

[0044] The connection device 1 also comprises a sleeve 11, which is inserted axially onto the threaded shaft 8 from the underside of the threaded shaft, and which has at its lower end a radially protruding end flange 12, which is so large in diameter that in the fully fitted state of the sleeve 11 the end flange covers the underside of the ring holder 4, and in this case also the two recesses 5 on the underside of the ring holder 4, so that the end regions 3 of the eyes 2 inserted therein can no longer be removed from the recesses 5.

[0045] On the upper side of the ring holder 4, an end face 14 is provided which extends around the through hole 15 and which has a very small clearance to the underside of the bolt head 7 when the load bearing bolt 6 is assembled. The load bearing bolt 6 is connected to the ring holder 4 by means of a ball bearing 9, the rolling elements of which are received partly in a guide groove 16 formed on the unthreaded portion 13 of the load bearing bolt 6 and partly in an associated receiving groove 17 provided in the through hole 15 in the ring holder 4.

[0046] Due to the ball bearing 9, the load bearing bolt 6 is not only rotatably supported in the through hole 15 of the ring holder 4, but is also connected to the ring holder 4, so that the small clearance between the underside of the bolt head 7 and the end face 14 of the top of the ring holder 4 ensures a slight rotatability of the load bearing bolt 6 relative to the ring holder 4 with only a small frictional force when the rotation of the bolt head 7 of the load bearing bolt 6 is not blocked.

[0047] As can be seen from the illustrations in Figure 1 , Figure 3 and Figure 4 , on the upper side of the ring holder 4, on both sides of the bolt head 7 which is configured in the shape of a hexagon, two locking members in the form of mutually opposing inclined levers 18 are fitted, which are positioned symmetrically relative to the clamping plane of the eye 2. As can be seen from the illustrations, each of these inclined levers 18 lies on a rotation axis 19 which is always connected to the ring holder 4 on both sides of the inclined lever 18 by means of a bearing block 20.

[0048] In this case, the arrangement of the inclined levers 18 and the bearing blocks 20 is configured in such a way that each inclined lever 18, when it is pivoted inwards in the direction towards the bolt head 7 from its initial position (as shown in Figure 1 , Figure 3 and Figure 4 ), assumes a locking position in which it forms an operating connection with the associated side face 22 of the hexagon of the bolt head 7 by moving into abutment with a lever member 21 at a position which abuts against the side face 22 of the hexagon of the bolt head 7, thus achieving a locking position of the inclined lever 18 in which the end face of the lever member 21 in the direction of rotation abuts against the surface 14 on the ring holder 4.

[0049] In this way, by forming this locking position, the rotation blocking of the load bearing bolt 6 can be achieved by tilting the inclined levers 18 inwards towards the bolt head 7, which can be done manually without any difficulty.

[0050] Only when the inclined levers 18 are tilted again into their outwardly unfolded initial position, as Figure 1 , Figure 3 and Figure 4As shown, the bolt head 7 is released again in the direction of rotation, and can then rotate relative to the ring retainer 4 via the ball bearing 9.

[0051] Figure 5 An enlarged view of the bearing bolt 6 in a disassembled state is shown, in which, at this location below the threaded shaft 8, a sleeve 11 that can be pushed onto the threaded shaft by the radially extending end flange 12 with a lower circular shape is also shown.

[0052] like Figure 5 As shown, the lower side of the bolt head 7 is adjacent to the unthreaded portion 13 of the bearing bolt 6. This unthreaded portion has a guide groove 16 slightly above the center of its axial length, in which the balls of the ball bearing 9 engage with half of the guide groove. Figure 5 In the image, the balls of the ball bearing 9 are shown in this engaged state, wherein the radially outer half of the balls is received in a receiving groove 17 formed in the through hole 15 of the ring retainer 4. Figure 4 ).

[0053] Between the unthreaded portion 13 that carries the bolt shaft and the threaded shaft 8 that is fitted to its axial end region is a shaft portion 23 with a reduced diameter, and the threaded shaft 8 is then axially abutted against this shaft portion. Figure 5 ).

[0054] As described above, for the assembly state of the connecting device 1 according to the present invention, for example, Figure 1 and Figure 2 As shown, the sleeve 11 moves axially from the free end of the threaded shaft 8 above the threaded shaft until the sleeve 11 is in a fixed position.

[0055] In this regard, please refer to the following: Figure 6 and Figure 7 The illustration, Figure 6 and Figure 7 A detailed diagram showing a portion of the bearing bolt 6 and an enlarged cross-section of the sleeve 11 that has been pushed upwards onto the bearing bolt is provided. Figure 6 In the middle, sleeve 11 has been pushed upward above the threaded shaft, but has not yet reached its fixed end position.

[0056] Figure 7 The sleeve 11 is now shown in a state where it is fully pushed upward onto the axis of the bearing bolt 6 and has reached the fixed position of the sleeve and the bearing bolt 6.

[0057] like Figure 6 and Figure 7 As shown, in the region of the shaft portion 23 extending between the unthreaded portion 13 and the threaded shaft 8, a radially extending annular protrusion 24 is formed on the shaft portion 23, the outer periphery of the annular protrusion having a radial diameter configured to be slightly smaller than the inner diameter of the sleeve 11.

[0058] On the inner surface of the sleeve 11, a circumferentially extending circumferential receiving groove 25 is formed, in which a circlip 26 is located, and in this case, which only projects into the receiving groove 25 in order to be held in the receiving groove in the axial direction in its non-tensioned state. In this case, however, the receiving groove 25 is configured in its radially extending direction in the wall of the sleeve 11 so large that a radially extending circlip 26 can be completely received in the receiving groove 25 in such a way that it no longer projects from the receiving groove radially into the interior opening of the sleeve 11.

[0059] The protrusion 24 is provided on its side facing the threaded shaft 8 with a circumferentially inclined starting member 27, which extends in the axial direction obliquely with respect to the axial center axis of the carrier bolt 6 and from a radially smaller diameter position obliquely spaced apart from the threaded shaft 8 to a larger diameter position, that is to say, to the starting point of the radially outer surface of the protrusion 24, as Figure 5 and Figure 6 illustrated.

[0060] At the axially opposite axial end of the protrusion 24 facing the unthreaded portion 13, an inclined starting member 28 is also provided, which, however, extends in the opposite direction to the inclined starting member 27 and also only over the smaller diameter change of the shaft portion 23.

[0061] As Figure 6 illustrated, the circlip 26 received in the receiving groove 25 in the non-tensioned state at the inner surface of the sleeve 11 projects in its non-tensioned state with a size slightly smaller than its radial half into the interior space of the sleeve 11. If this sleeve 11 is now pushed axially from its lower side onto the shaft of the carrier bolt 6, during the axial movement of the sleeve 11, the circlip 26 initially moves against the inclined starting member 27, whereby, as the relative axial movement between the sleeve 11 and the shaft portion 23 continues, the circlip expands radially outwards and in this case further radially into the receiving groove 25, while the circlip moves over the radially outer surface of the protrusion 24, against which it abuts with the sleeve 11.

[0062] As soon as the sleeve 11 is moved axially to the distance at which the circlip 26 reaches the other, oppositely inclined starting face 28, the circlip is deflected radially inwards again due to the elastic restoring force resulting from its expansion, while the circlip slides along the inclined starting member 28, in the event of a continued axial movement of the sleeve 11.

[0063] In this case, the position of the receiving groove 25 in the sleeve 11 relative to its free end is chosen in such a way that, when the end face of the sleeve 11 strikes the underside of the oppositely radially enlarged unthreaded portion 13, the snap ring 26 is again deflected radially inwards to such a distance that the snap ring has precisely reached the axially radially inner end of the inclined starting member 28, as is shown in Figure 7

[0064] In this state, the sleeve 11 is fixed axially relative to the carrier bolt 6 by the cooperation of the deflected snap ring 26 with the inclined starting member 28 facing the sleeve in the fixed position, whereby the sleeve 11 is held on the carrier bolt 6.

[0065] If the sleeve 11 is now to be removed from the carrier bolt 6, it is only necessary to exert a tensile force on the sleeve 11 in the direction axially away from the unthreaded portion 13. This leads to the triggered axial movement between the sleeve 11 and the carrier bolt 6 during which, due to the inclined starting member 28, the snap ring 26, which is then again opened radially outwards in the receiving groove 25, in this state moves over the outer peripheral surface of the protrusion 24 and is again elastically deflected radially along the subsequent inclined starting member 27 at the other axial end of the protrusion 24, so that there is no longer a locking position between the sleeve 11 and the carrier bolt 6, and the sleeve 11 can then be removed radially from the carrier bolt.

[0066] Not only the axial pushing of the sleeve 11 onto the carrier bolt 6 but also the axial removal of the fitted sleeve 11 from the bolt always only requires an axial force acting on the sleeve 11, which can cause the radial spring-back of the snap ring 26 via the inclined starting member 27 or the inclined starting member 28, that is to say, a relatively small force which can also be applied manually as a rule.

[0067] Due to the structure shown in the figures, removal as shown in Figure 1 and Figure 2 can now be carried out with the assembled connection device 1, which is achieved by removing the sleeve 11 axially from the underside of the ring holder 4 using a very small force, as shown in Figure 4 and subsequently by lifting the ring holder 4 in the upward direction with the carrier bolt 6 and the locking member 18 and removing this elevated structural unit from the interior space of the eye 2. Through the intermediate space between the then exposed end regions 3 of the eye 2, a closing sling, for example, such as a cable loop or the like, can then be introduced and the ring holder 4 can then be placed again on the end regions 3 of the eye 2 together with the carrier bolt 6 and the locking member 18, so that they are again engaged in the open recess 5 of the ring holder 4. Subsequently, the sleeve 11 is pushed axially upwards on the threaded portion 8 of the carrier bolt 6 from below until the sleeve reaches its position in the connection device 1. Figure 7 ​The locking position shown in the middle is reached, and the sleeve in the locked position is then again held on the shaft of the load bolt.

[0068] The process of suspending or introducing the closing sling can take place in a very simple and quick manner and requires only a small force, so that the suspension of the lifting eye 2 on the relevant holding device or lifting device can subsequently take place via the closing sling.

[0069] In the assembled state, the through-hole 15 in the ring holder 4 is configured in such a way that, in the assembled state, the sleeve 11 projects axially into an axial region in the through-hole 15, between the inner surface of the through-hole 15 and the outer circumferential surface of the axial portion of the sleeve 1 that projects into the through-hole, there is a small radial gap, in order to ensure easy, frictionless relative rotation between the sleeve 11 and the ring holder 4. In this case, an axial annular gap is also provided between the upper side of the radially projecting end flange 12 of the sleeve 11 and the axial lower end face of the ring holder 4, as is shown in the cross-sectional view in Figure 3 .

[0070] Thus, in the case of a load 10 coupled to the threaded shaft 8, the rotation of the threaded shaft can be achieved in the case of the load bolt 6 not being blocked in rotation by the locking member 18, the load bolt 6 being oriented in the load direction relative to the position of the lifting eye 2 without the use of a tool.

[0071] In summary, the connection device 1 according to the application has a relatively simple structure, in particular with regard to the advantages achieved simultaneously therewith.

Claims

1. A connection device (1) comprising a load bearing bolt (6), a lug (2), a ring holder (4), a sleeve (11), at least one locking member (18) and a ball bearing (9), the connection device (1) being intended for coupling a load to the lug (2) by means of the load bearing bolt (6), wherein, the load bearing bolt (6) comprises a longitudinal axis, a threaded shaft (8) to be screwed into the load, and a bolt head (7) projecting radially beyond the threaded shaft (8) and further rotatable with the threaded shaft relative to the lug (2) with a coupled load (10), wherein the load bearing bolt (6) is positioned in a through-hole (15) of the ring holder (4) so as to be rotatable about the longitudinal axis, the sleeve (11) is fixed to the load bearing bolt (6), rotatable about the load bearing bolt (6) and releasable from the load bearing bolt (6) tool-free by means of a tensile force in axial direction, wherein the sleeve defines a receiving groove and, in an assembled state, is fixed to the load bearing bolt (6) by means of a snap ring (26) which, when viewed in a direction towards the bolt head, is located axially above the threaded shaft, the snap ring being accommodated in the receiving groove such that the sleeve is releasable from the load bearing bolt by pulling the sleeve axially along the longitudinal axis, the ring holder (4) comprises an underside which is covered by an end flange (12) projecting radially at a lower end of the sleeve (11); the at least one locking member (18) is arranged on the ring holder (4), wherein the at least one locking member (18) is engageable with the bolt head (7) and movable into a locking position and an initial position, and wherein the at least one locking member (18) blocks a rotation of the bolt head (7) relative to the ring holder (4) in the locking position and is not engaged with the bolt head (7) in the initial position; the load bearing bolt (6) is supported in the through-hole (15) of the ring holder (4) by means of the ball bearing (9); and the lug (2) is configured as an open ring comprising two end regions (3), wherein each of the two end regions (3) is curved in a direction towards the other of the two end regions (3), and wherein in an assembled state the two end regions (3) extend radially into a recess (5) at opposite sides of one another, the recess being formed on an underside of the ring holder (4) and being open in a downward direction, In the non-mounted state of the sleeve (11), the snap ring (26) is located in a receiving groove (25) fitted to the inner surface of the sleeve (11), wherein, in the rest state, the snap ring protrudes from the receiving groove into the interior space of the sleeve (11), a radially protruding annular protrusion (24) is also formed on the shaft of the carrier bolt (6) in the region between its bolt head (7) and the threaded shaft (8), which annular protrusion is provided with inclined starting members (27, 28) at both ends of its axial length, such that when the sleeve (11) is pushed or removed axially, the snap ring (26) is always pressed via one inclined starting member (27, 28) into the receiving groove (25) in the sleeve (11) and, after the axial length of the annular protrusion (24) has been passed over the outer circumference of the other inclined starting member (28, 27), the snap ring springs back again radially into its rest state.

2. The connection device according to claim 1, characterized in that The at least one locking member (18) is configured as an inclined lever.

3. The connection device according to claim 1 or 2, characterized in that The bolt head (7) forms a hexagonal shape when viewed from above.

4. The connection device of claim 1, wherein The carrier bolt (6) is supported on the ring holder (4) by the ball bearing (9) in the region between the bolt head (7) and the starting portion of the threaded shaft (8).

5. The connection device according to claim 4, characterized in that The carrier bolt (6) is provided with a guide groove (16) for receiving the balls of the ball bearing (9).

Images