ASSEMBLY LOCKING DEVICE, THREAD BOLT WITH ASSEMBLY LOCKING DEVICE, A COMPONENT WITH INSTALLED THREAD BOLT AS WELL AS A MANUFACTURING METHOD FOR THE ASSEMBLY LOCKING DEVICE AND AN ASSEMBLY METHOD OF THE THREAD BOLT WITH ASSEMBLY LOCKING DEVICE

Abstract

An assembly locking device adapted to a normalized standard or fine thread of a thread shaft of a thread bolt, so that the locking device is positionable in a loss-proof manner on the thread of the thread shaft. The locking device includes: a cylindrical turn comprised of a plurality of helically wound turns, of a wire, a transition turn and adjacent to the second end of the helix is a blocking turn which has a negative pitch P.sub.B compared to the holding turn, so that at least an end portion of the blocking turn is elastically displaceable in the axial direction of the central longitudinal axis between an insertion position and a blocking position. The end portion of the blocking turn forms the second end of the helix and in the blocking position is arranged radially outwardly of the transition turn and/or the holding turn.

Claims

1. An assembly locking device adapted to a thread of a thread shaft of a thread bolt with a bolt head, so that the assembly locking device is positionable on the thread of the thread shaft in a loss-proof manner and the thread bolt with assembly locking device is arrangeable in a pull-out-proof manner inserted in a component opening, wherein the assembly locking device comprises the following features: a. a cylindrical helix comprised of a plurality of helically wound turns of a wire, which comprises a first end and a second end, b. starting at the first end of the helix, at least one holding turn is provided, which extends over an angular range of greater than 360° about a central longitudinal axis of the helix and comprises a positive pitch P.sub.H as well as an inner diameter D.sub.H, c. following the holding turn, a transition turn is provided which extends over an angular range of at least 65° about the central longitudinal axis of the helix and comprises a smaller pitch P.sub.U as well as an increasing inner diameter D.sub.U compared to the holding turn, and d. adjacent to the second end of the helix, a blocking turn is provided which extends over an angular range of at least 65° about the central longitudinal axis of the helix and comprises a negative pitch P.sub.B compared to the holding turn, so that at least an end portion of the blocking turn is elastically displaceable in the axial direction of the central longitudinal axis between an insertion position and a blocking position, wherein the end portion of the blocking turn forms the second end of the helix in the insertion position and is arranged radially outwardly of the transition turn and/or the holding turn in the blocking position.

2. The assembly locking device according to claim 1, the wire of which comprises a wire diameter D.sub.Draht in the range of
√{square root over (3)}* 7/24*P.sub.RG;FG≤D.sub.Draht≤√{square root over (3)} 7/16*P.sub.RG;FG wherein P.sub.RG; FG denotes a pitch of a thread.

3. The assembly locking device according to claim 2, in which the holding turn comprises the inner diameter D.sub.H in the range of
d.sub.3,RG;FG<D.sub.H<d.sub.2,RG;FG wherein d.sub.3, RG; FG denotes a core diameter and d.sub.2, RG; FG denotes a flank diameter of the thread.

4. An assembly locking device according to claim 1, wherein the thread is a normalized standard thread RG or a normalized fine thread FG.

5. The assembly locking device according to claim 1, for which geometrical data of the normalized standard thread RG are defined in the DIN standards DIN 13-1 and DIN 13-12 and for which geometrical data of the normalized fine thread FG are defined in the DIN standards DIN 13-2 to DIN 13-12, wherein the geometrical data for the normalized standard thread RG and the geometrical data for the normalized fine thread FG define the pitch P.sub.RG; FG, the core diameter d.sub.3, RG; FG and the flank diameter d.sub.2, RG; FG.

6. The assembly locking device according to claim 4, in which the at least one holding turn and the transition turn are wound on block so that turns adjacent to each other in the axial direction are abutting each other at least partially.

7. The assembly locking device according to claim 1, in which the transition turn and the blocking turn extend over an angular range of 150° to 300° about the central longitudinal axis of the helix.

8. An assembly locking device according to claim 2, wherein the thread is a normalized standard thread RG or a normalized fine thread FG.

9. The assembly locking device according to claim 2, for which geometrical data of the normalized standard thread RG are defined in the DIN standards DIN 13-1 and DIN 13-12 and for which geometrical data of the normalized fine thread FG are defined in the DIN standards DIN 13-2 to DIN 13-12, wherein the geometrical data for the normalized standard thread RG and the geometrical data for the normalized fine thread FG define the pitch P.sub.RG; FG, the core diameter d.sub.3, RG; FG and the flank diameter d.sub.2, RG; FG.

10. The assembly locking device according to claim 8, in which the at least one holding turn and the transition turn are wound on block so that turns adjacent to each other in the axial direction are abutting each other at least partially.

11. The assembly locking device according to claim 2, in which the transition turn and the blocking turn extend over an angular range of 150° to 300° about the central longitudinal axis of the helix.

12. An assembly locking device according to claim 3, wherein the thread is a normalized standard thread RG or a normalized fine thread FG.

13. The assembly locking device according to claim 3, for which geometrical data of the normalized standard thread RG are defined in the DIN standards DIN 13-1 and DIN 13-12 and for which geometrical data of the normalized fine thread FG are defined in the DIN standards DIN 13-2 to DIN 13-12, wherein the geometrical data for the normalized standard thread RG and the geometrical data for the normalized fine thread FG define the pitch P.sub.RG; FG, the core diameter d.sub.3, RG; FG and the flank diameter d.sub.2, RG; FG.

14. The assembly locking device according to claim 12, in which the at least one holding turn and the transition turn are wound on block so that turns adjacent to each other in the axial direction are abutting each other at least partially.

15. A thread bolt with a thread shaft and a bolt head which comprises a thread, in particular a normalized standard thread RG or a normalized fine thread FG, as well as an assembly locking device according to claim 1, which is arranged in a loss-proof manner on the thread shaft with the second end of the cylindrical helix adjacent to the bolt head.

16. The thread bolt according to claim 15, on which the thread is defined as a normalized standard thread RG or a normalized fine thread FG on the thread shaft by the normalized nominal diameter d.sub.RG; FG and the normalized pitch P.sub.RG; FG and the thread shaft in combination with the assembly locking device comprises an assembled outer diameter d.sub.M in the range of
d.sub.M=d.sub.RG;FG−⅞√{square root over (3)}*P.sub.RG;FG+3*D.sub.Draht in which the wire diameter D.sub.Draht of the assembly locking device is within the range of
√{square root over (3)}* 7/24*P.sub.RG;FG≤D.sub.Draht≤√{square root over (3)} 7/16*P.sub.RG;FG

17. The thread bolt according to claim 15, in which a wire of the assembly locking device is received in a thread valley of the thread bolt so deep in a radial direction that a center point of the wire of the assembly locking device is arranged at most at a level of thread tips of the thread bolt which are arranged directly opposite to each other or radially deeper in the thread valley.

18. The thread bolt according to claim 16, in which a wire of the assembly locking device is received in a thread valley of the thread bolt so deep in a radial direction that a center point of the wire of the assembly locking device is arranged at most at a level of thread tips of the thread bolt which are arranged directly opposite to each other or radially deeper in the thread valley.

19. A component with a passage hole which is round in cross-section and in which the thread bolt with assembly locking device according to claim 15 is arranged in a pull-out-proof manner.

20. The component according to claim 19, in which the passage hole comprises a hole diameter D.sub.L in the range of
d.sub.M<D.sub.L≤d.sub.RG;FG−⅞√{square root over (3)}*P.sub.RG;FG+4*D.sub.Draht with d.sub.M as assembled outer diameter in the range of
d.sub.M=d.sub.RG;FG−⅞√{square root over (3)}*P.sub.RG;FG+3*D.sub.Draht wherein the wire diameter D.sub.Draht of the assembly locking device is in the range of
√{square root over (3)}* 7/24*P.sub.RG;FG≤D.sub.Draht≤√{square root over (3)} 7/16*P.sub.RG;FG

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The embodiments of the present disclosure are explained in more detail with reference to the accompanying drawings. Showing:

[0036] FIG. 1 a perspective view of an embodiment of the assembly locking device,

[0037] FIG. 2 a side view of the assembly locking device of FIG. 1,

[0038] FIG. 3 a top view of an embodiment of the assembly locking device,

[0039] FIG. 4 a lateral sectional view of the thread bolt,

[0040] FIG. 5 a lateral sectional view of the geometrical data of an outer thread,

[0041] FIG. 6 a further lateral sectional view of a thread shaft of the thread bolt with an assembly locking device installed thereon, in which the blocking turn is in a blocking position,

[0042] FIGS. 7a-d individual sequences of installation of the thread bolt with assembly locking device in a passage hole of a component as well as the retention of the thread bolt with assembly locking device in the passage hole after installation with the aid of the assembly locking device,

[0043] FIG. 8 an illustration of geometrical data relating to the position of the wire of the assembly locking device in the thread of the thread shaft,

[0044] FIG. 9 a component with a passage hole in which the thread bolt with assembly locking device is insertable and arrangeable in a pull-out-proof manner,

[0045] FIG. 10 a schematic view of a component with a passage hole, in which the thread bolt with assembly locking device is arranged in a pull-out-proof manner, and a further component with a thread flange for screwing in and fastening the thread bolt, wherein the assembly locking device is receivable in an entry chamfer of the thread flange in the fastened state of the component on the further component,

[0046] FIG. 11 a flow chart of an embodiment of the manufacturing method of the assembly locking device, and

[0047] FIG. 12 a flow chart of an embodiment of the installation method.

DETAILED DESCRIPTION

[0048] In FIGS. 1 to 3, various views of an embodiment of the assembly locking device 1 are shown. The assembly locking device 1 may be adapted to be arranged on a thread bolt 10 having a bolt head 12, a thread shaft 14 and a standard thread 16 (see FIG. 4). The standard thread 16, which can be right-handed or left-handed, is a normalized standard thread RG or a normalized fine thread FG. The geometric data of the normalized standard thread 16 are defined in known DIN standards, so that the assembly locking device 1 may be provided on the basis of the normalized geometric data.

[0049] The geometric data of the normalized standard thread RG, which may be also referred to as nominal dimensions, are specified in the DIN standards DIN 13-1 and DIN 13-12. The geometric data describing the normalized standard thread RG include the nominal diameter d.sub.RG, the pitch P.sub.RG, the flank diameter d.sub.2, RG and the core diameter d.sub.3, RG. These geometrical data also define a normalized fine thread FG. As an example, Table 1 shows an extract of the geometric data for the standard thread RG according to DIN 13-1. In Table 1, a portion for the nominal diameter d.sub.RG of 1 mm≤d.sub.RG≤18 mm is defined in combination with values for the pitch P.sub.RG in the range of 0.25 mm≤P.sub.RG≤2.5 mm.

[0050] In addition, Table 2 shows an extract of the geometric data for the fine pitch thread FG according to DIN 13-4. Table 2 refers only to values of the nominal diameter d.sub.FG, the flank diameter d.sub.2, FG and the core diameter d.sub.3, FG for a pitch P.sub.FG of 0.75 mm.

[0051] For the definition and explanation of the standard thread RG, reference is made to DIN 13-1 and DIN 13-12 and these are incorporated by this reference. The same applies to the geometric data of the fine thread FG, for which reference is made to DIN standards DIN 13-2 to DIN 13-12 and these are herewith incorporated by this reference.

TABLE-US-00001 TABLE 1 Geometric data for a standard thread RG of thread shaft 14 with different pitches P.sub.RG according to DIN 13-1 from 1999 (excerpt) nominal thread    diameter d.sub.RG    row 1  row 2  row 3 pitch P.sub.RG flank- diameter d.sub.2, RG    core diameter    d.sub.3, RG     D.sub.3    thread depth  h.sub.3    H.sub.1 [00001]$\hspace{1em}\begin{array}{c}\mathrm{Curvature}\\ R=\frac{H}{6}\end{array}$ 1 0.25 0.838 0.893 0.729 0.153 0.135 0.036 1.1 0.25 0.938 0.793 0.  29 0.153 0.135 0.036 1.2 0.25 1.038 0.893 0.929 0.153 0.135 0.036 1.4 0.3  1.205 1.032 1.075 0.184 0.162 0.043 1.6 0.35 1.373 1.171 1.221 0.215 0.189 0.051 1.8 0.35 1.573 1.371 1.421 0.215 0.189 0.051 2 0.4  1.740 1.509 1.5  7 0.245 0.217 0.05  2.2 0.45 1.  08 1.64  1.713 0.27  0.244 0.0  5 2.5 0.45 2.208 1.94  2.013 0.27  0.244 0.0  5 3 0.5  2.675 2.3  7 2.459 0.307 0.271 0.072 3.5 0.6  3.110 2.7  4 2.850 0.3  8 0.325 0.087 4 0.7  3.545 3.141 3.242 0.429 0.379 0.101 4.5 0.7  4.013 3.5  0 3.  88 0.460 0.40  0.108 5 0.8  4.4  0 4.019 4.134 0.491 0.433 0.115 6 1   5.350 4.773 4.917 0.  13 0.541 0.144 7 1   6.350 5.773 5.917 0.  13 0.541 0.144 8 1.25 7.188   .4    .  47 0.767 0.677 0.180 9 1.25 8.188 7.4  7.647 0.767 0.677 0.180 10 1.5  9.02  8.1  0 8.376 0.  20 0.812 0.217 11 1.5  10.02  9.1  0 9.376 0.  20 0.812 0.217 12 1.75 10.863  9.853 10.10  1.074 0.947 0.253 14 2   12.701  11.546  11.835  1.227 1.083 0.289 16 2   14.701  13.546  13.835  1.227 1.083 0.289 18 2.5  1  .37  14.933  1  .2  4 1.534 1.353 0.361 dimensions in mm′ indicates data missing or illegible when filed

TABLE-US-00002 TABLE 2 Geometric data for a fine thread FG of thread shaft 14 with pitch P.sub.FG = 0.75 mm according to DIN 13-4 from 1999 (excerpt) dimensions in mm′ nominal thread diameter d.sub.FG flank diameter core diameter row 1 row 2 row 3 row 4 d.sub.2, FG d.sub.3, FG D.sub.1 Maûe in Millimeter Gewinde-Nenndurchmesser d.sub.FG Flankendurchmesser Kerndurchmesser Reihe 1 Reihr 2 Reihe 3 Reihe 4 d.sub.2, FG d.sub.3, FG D.sub.1 5 4.513 4.080 4.188 5.5 5.013 4.580 4.688 6 5.513 5.080 5.188 6.5 6.013 5.580 5.688 7 6.513 6.080 6.188 7.5 7.013 6.580 8.688 8 7.513 7.080 7.188 8.5 6.013 7.580 7.688 9 6.513 8.080 8.188 9.5 9.013 8.580 8.688 10 9.513 9.080 9.188 10.5 10.013 9.580 9.688 11 10.513 10.080 10.188 11.5 11.013 10.580 10.688 12 11.513 11.080 11.188 12.5 12.013 11.580 11.688 13 12.513 12.080 12.188 13.5 13.013 12.550 12.688 14 13.513 13.080 13.188 14.5 14.013 13.580 13.688 15 14.513 14.080 14.188 16 15.513 15.080 15.188 17 16.513 16.080 16.188 18 17.513 17.080 17.188

[0052] To illustrate the geometrical data relevant for the standard thread RG and the fine thread FG, FIG. 5 shows a partial section through an outer thread. Two adjacent thread valleys 17 are shown, which are separated from each other by a thread crest 18. The thread crest 18 is defined by two thread flanks arranged at an angle of 60° to each other. The thread flanks of each thread valley 17 facing each other are also arranged at an angle of 60° to each other. As can be seen from the dimensioning in FIG. 5, a section of a cut along the central line M of the thread shaft 14 is shown which, with reference to FIG. 4, lies above the central line M of the thread 16 of the thread shaft 14.

[0053] As shown in FIGS. 1 to 3, the assembly locking device 1 is comprised of a cylindrical helix 20. The cylindrical helix 20 is wound from a wire in a manufacturing method (step S1) in which a plurality of helically wound turns 30, 40, 50 are produced (step S1a).

[0054] The helix 20 comprises a first end 22 and a second end 24. The first end 22 may be arranged in a winding direction RW of the helix 20 or in a pitch direction RS of an initial turn 26 of the helix 20 at the beginning of the helix 20 (see FIGS. 1, 2). The turns of the helix 20 may be characterized by the fact that they extend continuously in a circular arc shape. This also may apply to the beginning and the end of the helix 20.

[0055] The cylindrical shape of the helix 20 results from the adaptation of the assembly locking device 1 to a thread bolt with a round shaft cross-section.

[0056] The wire from which the assembly locking device 1 may be wound comprises a round cross-section, as shown in FIGS. 1 to 3. A wire with an elliptical cross-section or a rhombic cross-section or a cross-section rounded on one side may be used. The different cross-sectional shapes are used in dependence thereon to increase a retention of the assembly locking device 1 on the thread 16 of the thread bolt 10.

[0057] The wire of the assembly locking device may be comprised of a spring-elastic material with sufficient tensile strength. In addition, it is suitable for winding several turns.

[0058] Starting at the first end 22 of the helix 20, at least one holding turn 30 is wound. The holding turn 30 has the function of reliably holding the assembly locking device 1 on the thread 16 of the thread bolt 10. Thus, the at least one holding turn 30 ensures the position of the assembly locking device 1 on the bolt shaft 14. Furthermore, the at least one holding turn 30 ensures a reliable connection between the assembly locking device 1 and the thread bolt 10, so that the thread bolt 10 is held in a pull-out-proof manner in a passage hole 72 of a component 70 (see below).

[0059] The at least one holding turn 30 extends about a central longitudinal axis L of the helix 20 in an angular range of at least 360°. Depending on the load on the assembly locking device 1, for example due to a weight of the thread bolt 10 or due to a pull-out load of the thread bolt 10 at the passage hole 72 of the component 70, several holding turns 30 may be provided. The holding turn 30 may extend over an angular range selectable from 360° up to 720° or more. For example, such as 1.5 or 2 or 2.5 holding turns 30 are to be provided or wound starting at the first end 22 of the helix 20 (step S1b).

[0060] The at least one holding turn 30 may comprise a positive pitch P.sub.H as well as an inner diameter D.sub.H. The choice of the pitch P.sub.H and the inner diameter D.sub.H ensure a reliable frictional connection or a reliable hold of the holding turn 30 and thus of the assembly locking device 1 on the thread 16 of the thread bolt 10.

[0061] Subsequently to the at least one holding turn 30 with positive pitch P.sub.H, a transition turn 40 is wound (step S1c) or provided. The transition turn 40 may establish the cohesion and the transition between the holding turn 30 for the retaining or positioning function of the assembly locking device 1 (see above) and a blocking turn 50 for a blocking function or pull-out protection of the assembly locking device 1 with thread bolt 10 (see below).

[0062] The transition turn 40 may extend over an angular range which does not comprise a complete turn, i.e. 360°. According to a design of the present disclosure, the transition turn 50 extends in an angular range of at least 65° about the central longitudinal axis L of the helix 20. Since the blocking turn 50 is provided with a negative pitch P.sub.B, the transition turn 40 initiates a pitch transition or a pitch change between the positive pitch P.sub.H of the holding turn 30 and the negative pitch P.sub.B of the blocking turn 50. The pitch P.sub.U of the transition turn 40 may be smaller than the pitch P.sub.H of the holding turn 30 and may be larger than the pitch P.sub.B of the blocking turn 50.

[0063] In addition, the transition turn 40 comprises an increasing inner diameter D.sub.U compared to the holding turn 30. The increasing inner diameter D.sub.U prepares or supports the blocking function of the blocking turn 50. This is because for the blocking function, the blocking turn 50 is arranged at least partially radially outside of at least the transition turn 40 and/or the holding turn 30 (see FIG. 3). As a result, the blocking turn 50 of the assembly locking device 1 may enlarge the outer diameter of the bolt shaft 14 beyond an inner diameter of a passage hole of a component in order to be able to retain the thread bolt 10 with assembly locking device 1 in the passage hole in a pull-out-proof and automatic manner.

[0064] Adjacent to the second end 24 of the helix 20 and following the transition turn 40, the blocking turn 50 may be wound and provided (step S1d). The blocking turn 50 extends over an angular range of at least 65° about the central longitudinal axis L of the helix 20. In addition, the blocking turn 50 is characterized by a negative pitch P.sub.B compared to the holding turn 30. The negative pitch P.sub.B of the blocking turn 50 may ensure a resilient, automatically acting, blocking function of the blocking turn 50. This is because the blocking turn 50 is arranged radially outside the holding turn 30 and/or the transition turn 40 due to the increasing inner diameter D.sub.U of the transition turn 40, which may increase due to a further increase in the inner diameter D.sub.B of the blocking turn 50. This creates the prerequisite for a resilient displacement of the blocking turn 50 in the direction of the central longitudinal axis L of the helix 20, which may be radially outwards from the remaining turns 30, 40 of the helix 20.

[0065] Accordingly, it may be possible to arrange the blocking turn 50 with respect to the central longitudinal axis L on the preceding turns 30, 40 or in the pitch direction of the holding turn 30 next to the preceding turns 30, 40. As an example, FIGS. 1 and 2 show an arrangement of the blocking turn 50 on the holding turn 30 and the transition turn 40. FIG. 3 shows the arrangement of the blocking turn 50 radially outwards from the holding turn 30 and the transition turn 40.

[0066] The negative pitch P.sub.B of the blocking turn 50 may specify that the blocking turn 50 is arranged radially outside and radially above the transition turn 40 or the transition turn 40 and the holding turn 30 (see FIGS. 1 and 2).

[0067] Due to the resilient properties of the wire of the assembly locking device 1, the blocking turn 50 can be resiliently displaced by an edge 74 of the passage hole 72 of a component 70 in the pitch direction R.sub.S of the holding turn 30 in order to spring back automatically to the position radially above the transition turn 40 or above the transition turn 40 and the holding turn 30 when the blocking turn 50 has been released again by the edge 74 of the passage hole 72. Thus, the blocking turn 50 is resiliently displaceable between the insertion position EP at the end 24 of the helix 20 and the blocking position BP radially above the holding turn 30 and the transition turn 40 (see FIG. 2). The insertion position EP, which designates the characteristic of the assembly locking device 1 on the bolt shaft 14 to be inserted into the passage hole 72 of the component 70, is explained with reference to FIG. 7b.

[0068] With reference to FIGS. 7a-d, a partial enlargement of the bolt shaft 14 with thread 16 is shown. On the thread 16, the assembly locking device 1 is arranged in such a manner that the blocking turn 50 faces the bolt head 12 and the holding turn 30 faces the component 70. Accordingly, the second end 24 of the helix 20 faces the bolt head 12.

[0069] The assembly locking device 1 arranged on the thread 16 initially comprises the blocking turn 50 in a position radially above or radially outside the transition turn 40 and the holding turn 30, as shown in FIG. 7a. This position corresponds to the blocking position BP (see FIG. 7c). In addition, the blocking turn 50 is, when viewed in the axial direction of the thread bolt 10, positioned adjacent to occupied thread valleys 17.

[0070] If the thread bolt 10 with assembly locking device 1 is inserted into the passage hole 72 of the component 70 in the assembly direction R.sub.M (step M1), the edge 74 of the passage hole 72 of the component 70 moves towards the blocking turn 50 in the pitch direction R.sub.S of the holding turn 30 (see FIG. 7a). Since the blocking turn 50 can be displaced resiliently into the adjacent free thread valley 19 by the edge 74 (see FIG. 7b), the thread bolt 10 with assembly locking device 1 can be inserted into the passage hole 72 until the assembly locking device 1 has completely passed the passage hole 72 (see FIG. 7c).

[0071] Since the edge 74 of the passage hole 72 no longer forces the blocking turn 50 into the free thread valley 19 after the assembly locking device 1 has been completely inserted into or has passed through the passage hole 72, the blocking turn 50 automatically springs back into its starting position according to FIG. 7c (step M2). Accordingly, as a result of this automatic process, which may form the basis for the blocking function of the assembly locking device 1, the blocking turn 50 is again arranged radially above occupied thread valleys 17 (see FIG. 7c). Thus, the pull-out-proofness of the thread bolt 10 with assembly locking device 1 from the passage hole 72 is ensured, since an inner diameter of the passage hole 72 is smaller than an outer diameter of the thread shaft 14 with the blocking turn 50 in its initial position.

[0072] If an attempt is made to remove the thread bolt 10 from the passage hole 72 of the component 70 in an extraction direction R.sub.A (see FIG. 7d), the blocking turn 50 prevents the extraction. This is because the edge 74 of the passage hole 72 displaces the blocking turn 50 in the direction of occupied thread valleys 17 on the bolt shaft 14 in the event of an attempted extraction of the thread bolt 10. It follows that the blocking turn 50 cannot escape into a free thread valley 19 in order to release the thread bolt 10 with assembly locking device 1 through the passage hole 72.

[0073] To facilitate the transport of a plurality of assembly locking devices 1 in a not yet installed state, the at least one holding turn 30 and the transition turn 40 may be block-wound or wound on block. Accordingly, turns 30, 40 which may be adjacent to each other are partially or fully radially adjacent to each other to form a closed cylindrical outer wall of the helix 20.

[0074] According to a further embodiment, the transition turn 40 and the blocking turn 50 may extend over an angular range WB of 150° to 300° about the central longitudinal axis L of the helix 20. An angle of 225° may be advantageous for this angular range WB (see FIG. 3).

[0075] The assembly locking device 1 may be arranged on the thread bolt 10, which comprises on its thread shaft 14 a normalized standard thread RG or a normalized fine thread FG according to the above geometric data of the DIN standards or related or analogous standards of other geometric systems.

[0076] The known geometric data of the standard thread RG or the fine thread FG on the thread shaft 14 support a dimensioning of the diameter of the wire of the assembly locking device 1. It has proven to be advantageous that the wire diameter D.sub.Draht must be set such that just the holding turn 30 is reliably received in the thread valley 17 of the thread 16. Otherwise, there is a risk that the assembly locking device 1 will be loosened or stripped from the thread shaft 14. Therefore, the wire of the holding turn 30 may be arranged in a thread valley 17 of the thread 16 with its center point MD not arranged above the thread tips 15 of the thread 16. Accordingly, the distance between two thread flanks arranged opposite each other and forming a thread valley 17 at the thread tips 15, i.e. between two points on the thread flanks at the same radial distance from the central longitudinal axis M of the thread shaft 14, is greater than or equal to the wire diameter D.sub.Draht. As a result, at least half of the wire cross-section is retained between the thread flanks, as shown schematically in FIG. 8. In other words, the wire of the assembly locking device 1 may be received so deeply in the radial direction in the thread valley 17 that the center point of the wire of the assembly locking device 1 is arranged at most at the level of the thread tips or radially deeper in the thread valley 17. The distance between the thread tips 15 at the thread flanks arranged opposite each other and forming a thread valley 17 may be greater than the wire diameter D.sub.Draht, so that the wire blocks the thread valley 17 for receiving a wire turn and may project in the radial direction beyond the thread tips 15 only with a portion of ≤48%, with a portion in the range of 45% to 15% of the wire diameter D.sub.Draht.

[0077] The other figures do not reflect this geometrical relationship, as they only schematically show the combination of the thread shaft and the assembly locking device.

[0078] Since the thread bolt 10 may comprise a normalized standard thread RG of the pitch P.sub.RG or a normalized fine thread FG of the pitch P.sub.FG, this may result in a diameter range for the wire diameter D.sub.Draht according to

√{square root over (3)}* 7/24*P.sub.RG;FG≤D.sub.Draht≤√{square root over (3)} 7/16*P.sub.RG;FG

wherein PRG; FG denotes a pitch of a normalized standard thread RG or a normalized fine thread FG.

[0079] In addition, to wind the holding turn 30 with a defined inner diameter DH so that the retention on the thread shaft 14 may be ensured. Here, again, the inner diameter D.sub.H is defined with respect to the normalized geometric data of a standard thread RG or a fine thread FG (see above). This results in the following value range for the inner diameter D.sub.H

d.sub.3,RG;FG<D.sub.H<d.sub.2,RG;FG

wherein d.sub.3, RG; FG denotes a core diameter and d.sub.2, RG; FG denotes a flank diameter of the normalized standard thread RG or the normalized fine thread FG.

[0080] Assuming that the thread bolt 10 may comprise the normalized fine thread FG or the normalized standard thread RG, the thread 16 of the thread shaft 14 is defined by the normalized nominal diameters D.sub.RG or D.sub.FG as well as the normalized pitch P.sub.RG or P.sub.FG. This results in an assembled outer diameter d.sub.M for the bolt shaft 14 with assembly locking device 1 arranged thereon according to

d.sub.M=d.sub.RG;FG−⅞√{square root over (3)}*P.sub.RG;FG+3*D.sub.Draht

[0081] The wire diameter of the assembly locking device 1 is within the range of

√{square root over (3)}* 7/24*P.sub.RG;FG≤D.sub.Draht≤√{square root over (3)} 7/16*P.sub.RG;FG

[0082] From the above dimensions of the thread shaft 14 with assembly locking device 1, a diameter D.sub.L of the passage hole 72 of the component 70 results, in which the thread bolt 10 with assembly locking device 1 is held in a pull-out-proof manner. For the diameter D.sub.L of the passage hole 72, the following applies:

d.sub.M<D.sub.L≤d.sub.RG;FG−⅞√{square root over (3)}*P.sub.RG;FG+4*D.sub.Draht

with d.sub.M as the assembled outer diameter in the range of

d.sub.M=d.sub.RG;FG−⅞√{square root over (3)}*P.sub.RG;FG+3*D.sub.Draht

wherein the wire diameter D.sub.Draht of the assembly locking device 1 is in the range of

√{square root over (3)}* 7/24*P.sub.RG;FG≤D.sub.Draht≤√{square root over (3)} 7/16*P.sub.RG;FG

[0083] FIG. 10 shows a schematic illustration of a preliminary stage of a fastening situation of the component 70 to a thread flange 80 of a further component (not shown). This schematic illustration thus relates to the situation in which the thread bolt 70, which is held securely in the passage hole 72 of the component 70 by means of the assembly locking device 1, is to be fastened to at least one further component. For this purpose, the further component comprises a passage hole or thread flange 80. If only one passage hole is provided in the further component, the thread bolt 14 may be screwed to a nut (not shown). In this case, the nut comprises an entry chamfer into the thread opening as described in more detail below with respect to the thread flange 80. This entry chamfer provides a receiving volume for the assembly locking device 1 adjacent to an entry opening of the inner thread channel of the nut, so that the latter does not interfere with the connection to be made.

[0084] FIG. 10 schematically shows a further component with a thread flange 80, into the thread 84 of which the thread bolt 14 can be screwed and therefore the component 70 is fastenable to the further component. When the thread bolt 14 is screwed into the thread flange 80, the entry chamfer 82 receives the assembly locking device 1. In this way, it may be ensured that the assembly locking device is not clamped between the component 70 and a further component and does not interfere with the connection between these.

[0085] The further component is illustrated by reference sign 80. In this case, the further component 80 comprises a fastening opening having an inner thread 84 and an entry chamfer 82 adjacent to the entry of the fastening opening as viewed in the thread direction of the inner thread 84.