Connecting means, connecting means blank, and method for producing a connecting means
Patent Information
- Application Number
- EP2023833464
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-02-21
- Filing Date
- 2023-12-18
- Publication Date
- 2025-12-31
AI Technical Summary
Existing connecting means, such as bolts and screws, often have a groove design that results in a poor thread formation when a thread is formed on the opposite side, making them difficult to install due to poor mountability.
A connecting means with a radial groove and a stiffness reduction structure, such as a recess or underfill, opposite the groove, which increases local surface pressure during thread forming, allowing for improved thread design and easier installation by enhancing contact pressure and deformation.
The solution enables better mountability and load-bearing capacity of the connecting means, simplifying the thread formation process and improving the thread's mechanical strength and adjustability, particularly in chassis systems.
Smart Images
Figure EP2023086436_29082024_PF_FP_ABST
Abstract
Description
[0001] Connecting means, connecting means blank and method for producing a connecting means
[0002] The invention relates to a connecting means, a connecting means blank and a method for producing a connecting means.
[0003] Fasteners are already known from the prior art. They serve to connect components or sections together, usually using a thread on the fastener for this purpose. Fasteners are also frequently used to allow adjustment. To ensure a high level of precision, fasteners often have a groove that allows for positive adjustment, particularly in chassis systems. However, this groove is designed in such a way that forming the thread by means of deformation on the side opposite the groove results in a poor thread design. This usually makes the fastener difficult to install.
[0004] It is therefore the object of the invention to provide a device and a method which allow a better assembly of connecting means to be achieved.
[0005] This object is achieved with a connecting means according to claim 1, with a connecting means blank according to claim 2, and with a method for producing a connecting means according to claim 11. Advantageous configurations, features, advantages, and embodiments emerge from the subclaims, the description, and the figures. According to the invention, a connecting means, in particular a bolt or a screw, is provided.Advantageously, the connecting means comprises a head region and / or a threaded region, the head region having actuating surfaces, the threaded region extending along and around a longitudinal direction, the threaded region having a thread whose center line lies in the longitudinal direction, the threaded region having a groove introduced in a radial direction, which extends in particular parallel to the longitudinal direction, the radial direction being perpendicular to the longitudinal direction, a stiffness-reducing structure, in particular a recess or an underfill, being provided opposite the groove or opposite + / - 60° to the groove in the threaded region. The connecting means serves to mechanically connect a wide variety of components and / or sections to one another, in particular within the framework of a force-locking connection. Alternatively, the connecting means can also be a form-locking connection means.The connecting means is also particularly suitable and / or intended for adjustment, in particular of a chassis. The connecting means comprises a head region. This head region forms, in particular, a distal end in the longitudinal direction of the connecting means. In order to enable torque transmission to the head region, the head region can have actuating surfaces. These actuating surfaces expediently have a normal which is directed in or parallel to the radial direction. The radial direction is, in particular, the direction which is expediently perpendicular to the longitudinal direction. The longitudinal direction, on the other hand, is, in particular, the direction in which the length of the threaded region and / or the connecting means is determined. The threaded region can also form a distal end of the connecting means in the longitudinal direction.In other words, one distal end in the longitudinal direction of the connecting means can be formed by the head region and the other distal end of the connecting means by the threaded region. The center line of the thread provided in the threaded region lies in the longitudinal direction or this center line can be congruent with the longitudinal direction at least in sections. A center line is understood to be the line from which the core radius or the flank radius of the thread is determined. In other words, the center line is therefore the central axis around which the thread is formed. The longitudinal direction, the radial direction and a circumferential direction can form a cylindrical coordinate system, wherein the longitudinal direction in particular forms the height direction, the radial direction the radial coordinate and the circumferential direction the angular coordinate. A groove is formed in the threaded region and is radially introduced into the threaded regions.In other words, the groove can be designed in a plane perpendicular to the longitudinal direction or to the center line in such a way that it is introduced into the thread in the radial direction from the outside to the inside. The longitudinal extent of the groove is designed, in particular, parallel to the longitudinal direction. In other words, the groove can therefore be rectilinear and / or parallel to the longitudinal direction. The groove serves, in particular, to be able to secure an eccentric element against rotation in a form-fitting manner. In other words, when the connecting means is used as an adjusting means, an adjustment option can be achieved by introducing an eccentric element into the groove. In other words, the invention can also relate to an adjusting system comprising a connecting means and a separate eccentric element, wherein the eccentric element in particular has an externally circumferential surface whose center of gravity is spaced from the longitudinal direction orto the center line in order to achieve eccentricity. The eccentric element engages at least partially, in particular by means of a projection, in the groove and / or surrounds the connecting means, in particular in the threaded area in which the groove is also present. In addition to the groove, the threaded area also has a stiffness reduction structure opposite the groove or opposite + / - 60° to the groove, in particular in the form of a recess or an underfill. Opposite is to be understood in particular as meaning that in a sectional plane perpendicular to the longitudinal direction, which intersects the groove and the stiffness reduction structure, there is a connecting line between the stiffness reduction structure and the groove, which runs through the longitudinal direction or intersects it. The intersection point of this connecting line with the longitudinal direction is advantageously arranged between the stiffness reduction structure and the groove.By opposite can in particular also be understood that the stiffness reduction structure is arranged 180° offset from the groove in the circumferential direction. By opposite + / - 60°, in particular to the groove, can be understood that there can also be a deviation of up to + / - 60° from the opposite. This angle of deviation is determined in particular in a plane perpendicular to the longitudinal direction and around the longitudinal direction. The stiffness reduction structure is in particular a structure which has the effect that when the threaded area is arranged between two ideal planes and when the groove comes into contact with one of these planes, the contact pressure on the other opposite plane is locally increased. However, this also has the effect, in particular, of increasing the contact pressure with the same contact force, so that greater deformation is achieved.Therefore, this type of structure is also referred to as a stiffness reduction structure within the scope of the invention. This stiffness reduction structure can, in particular, be an underfill or a groove, wherein the stiffness reduction structure in particular has its largest main dimension in the longitudinal direction or parallel to the longitudinal direction. Alternatively or additionally, the stiffness reduction structure is preferably designed to be rectilinear or unchanged in the longitudinal direction. This results in particularly simple production. As already mentioned, these stiffness reduction structures can, in particular, increase the local surface pressure, so that in this case, thread forming could be achieved in a simple manner. The stiffness reduction structure is, as already explained, in particular a recess or an underfill.An underfill is particularly characterized by being arranged externally, essentially in the thread area, but the underfill does not have any threads, especially thread peaks, but rather thread valleys. This can also increase the local surface pressure during thread forming in the thread area. A recess is particularly present when it is completely surrounded by surrounding materials except in its direction of extension or perpendicular to its direction of extension. Alternatively, the stiffness-reducing structure can also preferably be a groove.
[0006] A further aspect of the invention can relate to a fastener blank. The fastener blank is used in production to form a fastener as described above and / or below. The elements already presented for the fastener can also be present in the fastener blank, wherein, however, instead of the threaded region, a shaft region is present in the fastener blank, which serves in particular to provide a thread by means of a thread forming process or to form a thread in the shaft region in order to thus provide a threaded region. The transformation from the fastener blank to the fastener therefore takes place in particular exclusively by forming the shaft region in such a way that a threaded region is created.In other words, the shaft region of the connecting means blank is therefore thread-free and can otherwise have the same or the same features as the threaded region. In other words, the invention can advantageously also relate to a connecting means blank, in particular for producing a bolt or a screw, comprising a head region and a shaft region, wherein the head region can have actuating surfaces, wherein the shaft region extends along and / or around the longitudinal direction, wherein the shaft region is cylindrical or at least substantially cylindrical and its cylinder axis lies in the longitudinal direction, wherein the shaft region has a radial direction orhas a groove introduced in the radial direction, which extends in particular parallel to the longitudinal direction, wherein the radial direction is perpendicular to the longitudinal direction, wherein a stiffness reduction structure, in particular a recess or an underfill, is provided opposite the groove or opposite + / - 60° to the groove in the shaft region. The features already set out with regard to the connecting means, in particular concerning the head region, the actuating surfaces, the longitudinal direction, the radial direction, the groove and the stiffness reduction structure, can be provided in the same or equivalent manner in the connecting means blank. In contrast, the features set out for the connecting means with regard to the threaded region can apply in an equivalent manner to the shaft region in the connecting means blank.This of course also applies in reverse, so that features, advantages and design of the fastener blank can also be implemented in an equivalent manner in the fastener, provided this is not excluded due to the missing thread in the fastener blank. The shaft region of the fastener blank can be cylindrical or at least essentially cylindrical. In this case, essentially cylindrical can be understood to mean that the basic geometry is almost exclusively rotationally symmetrical about the cylinder axis. Almost exclusive rotational symmetry exists in particular when, in a cross-section perpendicular to the cylinder axis, which may run parallel to the longitudinal direction, the shaft region always has the same width or the same distance, without, however, taking the groove and / or the stiffness reduction structure into account in this consideration.Therefore, cylinders or cones in particular should be considered to have an almost exclusively rotationally symmetrical design. By providing a stiffness-reducing structure in the shaft area opposite the groove or opposite + / - 60° to the groove, a local surface load in the shaft area can also be increased during the forming of a thread. This increases the decisive contact pressure between a thread-forming device, in particular a rolling die, and the shaft area during thread forming. This allows the degree of plastic deformation to be increased in order to achieve a better or more defined thread design opposite or opposite + / - 60° to the groove. This can, in particular, increase the load-bearing capacity of the thread and / or the gaugeability of the thread. It can also facilitate screwing in the thread.
[0007] The fastener and / or the fastener blank are, in particular, formed as a single piece. This allows for particularly high mechanical strength. "Single piece" refers, in particular, to the fact that the fastener / component is not created by joining multiple components.
[0008] The fastener and / or the fastener blank are made, in particular, of a high-strength or ultra-high-strength material. A high-strength material is, in particular, a material whose tensile limit or tensile strength is at least 800 N / mm 2 , preferably at least 1000 N / mm 2 , is. An ultra-high-strength material, on the other hand, has a tensile limit or tensile strength of at least 1200 N / mm 2 , preferably at least 1400 N / mm 2By using a high-strength or ultra-high-strength material, the fastener can be classified in strength classes 8.8, 10.9, 12.9, or even 14.8, or 14.9, 15.8U, 15.9U, or higher. In other words, the fastener can be within or have these strength classes.
[0009] Preferably, the stiffness-reduction structure is a female structure. A female structure is understood to mean that material is removed or absent to form the structure. In other words, a female stiffness-reduction structure or structures may not be characterized by protrusions, but rather only by recesses, recesses, and / or underfills.
[0010] Advantageously, the stiffness reduction structure delimits the threaded region and / or the shaft region in the radial direction. In other words, the stiffness reduction structure can be introduced radially from the outside into the threaded region or the shaft region. For example, the stiffness reduction structure can interrupt thread turns in the threaded region and / or disrupt and / or interrupt their continuous course, in particular the continuous course of the thread peaks and / or the thread valleys. This allows a particularly simple and effective design of the stiffness reduction structure to be achieved.
[0011] In an alternative or additionally preferred embodiment, the or a stiffness reduction structure can be a structure extending in the longitudinal direction. This means, in particular, that the main direction of extension of the stiffness reduction structure runs in the longitudinal direction or parallel to the longitudinal direction. This allows for a particularly simple and rapid design of the stiffness reduction structure. Furthermore, this design also ensures that the stiffness reduction structure is always formed opposite the groove, especially when the groove runs along the longitudinal direction or parallel to the longitudinal direction.
[0012] Advantageously, the stiffness reduction structure is designed such that a portion of the groove always runs opposite its path. In other words, the stiffness reduction structure is designed such that the groove is also intersected in all planes that intersect the stiffness reduction structure and that run perpendicular to the longitudinal direction.
[0013] In an advantageous embodiment, the stiffness reduction structure is a recess, in particular a bore, introduced into an end face, wherein the end face delimits the connecting means or the connecting means blank in the longitudinal direction. In other words, the or one of the stiffness reduction structures can be a recess introduced into a surface of the connecting means or the connecting means blank bordered in the longitudinal direction. Advantageously, this recess is provided with a round, in particular circular, cross-section in a plane perpendicular to the longitudinal direction. Advantageously, this recess extends in a direction parallel to or congruent with the longitudinal direction. This allows particularly simple production and also a particularly uniform stiffness reduction to be achieved through the stiffness reduction structure.
[0014] Advantageously, the stiffness reduction structure is surrounded in the longitudinal direction by the threaded region and / or the shaft region. In other words, parts of the threaded region or the shaft region extend longitudinally above or below the stiffness reduction structure. Consequently, distal end regions of the threaded region and the shaft region exist in the longitudinal direction, which are designed free of stiffness reduction structures. This also makes it possible, in particular, to reduce the notch effect factor caused by the stiffness reduction structure. Alternatively or additionally, this can prevent or reduce an unfavorable collision between two notch effect factor-increasing influences, namely the distal ends and the stiffness reduction structures. The stiffness reduction structure advantageously has a rectangular, round, in particular circular, or elliptical cross-section.In the case of a one-sided open stiffness reduction structure, the cross-section refers to the base area and / or the wall areas of the one-sided open stiffness reduction structure, in particular the groove or recess. A rectangular or flat design, in particular of the base area, allows for a particularly easy-to-manufacture geometry. However, if the base and / or the cross-section and / or the transition between the wall area and the base area, or even the entire wall and base area, are round, in particular circular, or elliptical, a particularly low-stress design can be achieved.
[0015] Advantageously, the stiffness reduction structure extends longitudinally to a distal end of the threaded portion or the shaft portion. In other words, a stiffness reduction structure can also be provided directly from a distal end of the shaft portion or the threaded portion. This allows for particularly simple threading into the groove opposite the stiffness reduction structure with an eccentric element or an adjusting element. Alternatively or additionally, this can preferably simplify or improve the subsequent threading of the thread, in particular into a female thread.
[0016] Preferably, the extension of the stiffness reduction structure in the longitudinal direction is a maximum of 3.2 times, preferably a maximum of 2 times, and particularly preferably a maximum of 1.7 times, the diameter of the threaded region or the shaft region. This enables particularly gentle thread production for the forming tool, while at the same time the stiffness reduction structure can be used to mount a nut on the particularly well-formed threaded region, in particular a nut in combination with a lock nut. In an advantageous embodiment of the connecting element blank or the connecting element, the ratio of the extension of the stiffness reduction structure in the radial direction to the diameter of the shaft region or to the diameter of the threaded region is in a ratio of 0.01 to 0.1, preferably in a range of 0.012 to 0.06 and particularly strongly preferably in a range of 0.013 to 0.04.The extension of the stiffness reduction structure in the radial direction is in particular the depth of the stiffness reduction structure in the radial direction or the height. These can in particular be the maximum or minimum depth or height, which is advantageously measured from a circle around the center line or the circle congruent with the diameter of the shaft area. With a ratio in the range of 0.01 to 0.1, particularly simple production can be achieved. However, if the ratio is in a range of 0.012 to 0.06, this can in particular achieve an advantageous design with a low notch effect factor. However, if the ratio is in a range of 0.013 to 0.14, in particular an advantageous design of the thread can be achieved, whereby at the same time a particularly low mechanical load or overload due to the notch effect factor results.
[0017] In an alternative or additionally preferred embodiment of the connecting means blank or of the connecting means, the extension of the stiffness reduction structure in the longitudinal direction to the diameter of the shaft region or the diameter of the threaded region is in a ratio of 1.0 to 3.2, preferably in a range of 1.5 to 2 and, particularly preferably, in a range of 1.5 to 1.75. The length of the stiffness reduction structure is in particular the length of the outer contours of the stiffness reduction structure on the shaft region, which precisely characterizes the outer dimensions of the stiffness reduction structure. The length is in particular the main dimension of this contour in the longitudinal direction. If the ratio is in a range of 1.0 to 3.2, this can result in particularly simple production.However, if the ratio is in the range of 1.5 to 2, a particularly low mechanical weakening of the shaft area or the subsequent thread area can be achieved. However, if the ratio is in the range of 1.5 to 1.75, a particularly mechanically resilient thread design can be achieved. The diameter of the shaft area is, in particular, the nominal diameter of the shaft area, without taking into account the stiffness-reducing structure and / or the groove.
[0018] In a further preferred or alternatively preferred or advantageous embodiment of the connecting means blank or of the connecting means, the extension of the stiffness reduction structure in the longitudinal direction to the length of the shaft region or the threaded region in the longitudinal direction is in a ratio of 0.1 to 0.5, preferably in a range from 0.15 to 0.4, and particularly preferably in a range from 0.2 to 0.3. If the ratio is in a range from 0.1 to 0.5, this can achieve particularly simple production. If, on the other hand, the ratio is in a range from 0.15 to 0.4, this can result in particularly little mechanical weakening of the shaft region or the subsequent threaded region. If, however, the ratio is in a range from 0.2 to 0.3, this can result in a particularly mechanically resilient thread design.The diameter of the shaft area is in particular the nominal diameter of the same without taking into account the stiffness reduction structure and / or the groove.
[0019] Advantageously, the connecting means is an eccentric screw and / or the connecting means blank is an eccentric screw blank. An eccentric screw or an eccentric screw blank is understood to mean that it has an eccentric structure having a circular or elliptical outer region whose center is eccentrically displaced relative to the longitudinal direction, in particular in the radial direction. This eccentric structure can advantageously be formed integrally with the connecting means or with the connecting means blank. Advantageously, the eccentric structure is arranged between the head region and the threaded region or the shaft region. Preferably, the stiffness reduction structure does not penetrate the connecting means or the connecting means blank. In other words, the stiffness reduction structure does not extend completely to an opposite side.This can prevent or at least reduce mechanical weakening. Therefore, the stiffness-reducing structure is, in particular, a recess or underfill.
[0020] A further aspect of the invention may relate to a connecting means system comprising a connecting means blank or a connecting means and an eccentric element, wherein the eccentric element may have an eccentric structure and / or wherein the eccentric element engages or can engage with a projection into the groove of the connecting means or the connecting means blank. In other words, the eccentric element can thus be positively secured against rotation in the circumferential direction by the groove and this projection. The connecting means or the connecting means blank may have the features, configurations, advantages, or embodiments described above and / or below.
[0021] A further aspect of the invention may relate to a method for producing a connecting means. This method advantageously comprises the steps:
[0022] • Providing a connecting means blank, in particular as described above and / or below,
[0023] • Inserting a thread into the shaft area using two rolling tools, so that a threaded area is created,
[0024] • wherein the thread is introduced in particular in such a way that during the thread forming, at one point in time, one rolling tool covers the groove and at the same time the other rolling tool covers the stiffness reduction structure.
[0025] Using the method described here, a fastener blank can be formed into a fastener in a simple and effective manner. Reshaping the groove means, in particular, that the rolling tools are in contact with the edge regions of the groove on one side of the fastener and, on the other side, exert a force and / or deformation effect on parts and / or edge regions of the stiffness reduction structure. By providing the stiffness reduction structure in the fastener blank, in particular opposite the groove or opposite + / - 60° to the groove, a locally increased surface pressure can be achieved during thread formation, thereby positively supporting and / or improving the formation of the thread.
[0026] Further advantages and features of the present invention will become apparent from the following description with reference to the figures. Individual features of the illustrated embodiments may also be used in other embodiments, unless expressly excluded. They show:
[0027] Figure 1 shows a method for producing a connecting means;
[0028] Figure 2 shows a connecting element blank in isometric view;
[0029] Figure 3 shows a detailed view of a threaded area of a connecting means;
[0030] Figure 4 shows a further detailed view of a threaded area of a connecting means; and
[0031] Figure 5 shows an alternative detailed view of a threaded area of a fastener.
[0032] Figure 1 depicts a situation during a method for producing a fastener 1. In the depicted situation, the right-hand rolling tool 100 covers the groove 44, with a stiffness-reducing structure being introduced opposite this groove 44, which is simultaneously covered by the rolling tool 100 arranged on the left side. In other words, Figure 1 depicts a situation in which a fastener 1 is created or manufactured by introducing a thread into the fastener blank 2.
[0033] Figure 2 shows a fastener blank 2 having a head region 10. This head region 10 has actuating surfaces 12, each of which has a normal parallel to the radial direction R. Furthermore, the fastener blank 2 also has a shaft region 40, with the eccentric structure 39 arranged between the shaft region 40 and the head region 10. The shaft region 40 is cylindrical. In the distal end region in the longitudinal direction L, the shaft region 40 has a groove 44, with a stiffness-reducing structure in the form of a recess 46 or an underfill 48 provided opposite.
[0034] Figure 3 shows a detailed view of a threaded region 30 of a fastener 1. The fastener 1 has a thread 32 in the threaded region 30. In particular, fundamentally (and thus independent of the embodiment), the threaded region 30 can be formed precisely by the part in which the thread 32 is present. The thread 32 or the threaded region 30 has numerous underfills 38, each of which interrupts the course of the thread crests of the thread 32. Opposite and not visible in Figure 3, the threaded region 30 also has a groove 34.
[0035] Figure 4 shows a further embodiment of a threaded region 30 of a connecting means 1. As can be seen from Figure 4, the stiffness reduction structure, which in the example presented is designed as an underfill 38, can have a depth in the radial direction R or a thickness in the radial direction R that is less than the height difference between the thread peak and the thread valley. Such a configuration can be independent of the actual configuration of the underfill 38 presented here. The stiffness reduction structure is surrounded in the longitudinal direction L by the threaded region 30. In the longitudinal direction L, the threaded region 30 is bordered by the end face 60. Figure 5 shows a further alternative embodiment of a connecting means 1. The threaded region 30 furthermore has a thread 32, wherein the stiffness reduction structure is designed as a recess 36 in the longitudinal direction L orby a recess 36 running parallel to the longitudinal direction L. In particular, however, the center line of the recess 36 in the radial direction R is spaced from the longitudinal direction L. This also makes it possible, in particular, to use the recess 36 for a positive rotary drive during the formation of the thread.
[0036] List of reference symbols:
[0037] 1 - Connecting devices
[0038] 2 - Connector blank
[0039] 10 - Head area
[0040] 12 - Actuating surface
[0041] 30 - Thread range
[0042] 32 - thread
[0043] 34 - Groove
[0044] 36 - Recess
[0045] 38 - Underfill
[0046] 39 - Eccentric structure
[0047] 40 - Shaft area
[0048] 44 - Groove
[0049] 46 - Recess
[0050] 48 - Underfill
[0051] 60 - Frontal surface
[0052] 100 - Rolling tool
[0053] L - longitudinal direction
[0054] R - radial direction
Claims
Claims 1. A connecting means (1), in particular a bolt or screw, comprising a head region (10) and a threaded region (30), the head region (10) having actuating surfaces (12), the threaded region (30) extending along and around a longitudinal direction (L), the threaded region (30) having a thread (32) whose center line lies on the longitudinal direction (L), the threaded region (30) having a groove (34) introduced in a radial direction (R), which extends in particular parallel to the longitudinal direction (L), the radial direction (R) being perpendicular to the longitudinal direction (L), a stiffness-reducing structure, in particular a recess (36) or an underfill (38), being provided in the threaded region (30) opposite the groove (34) or opposite + / - 60° to the groove (34).
2. Fastener blank (2), in particular for producing a bolt or screw, advantageously according to claim 1, comprising a head region (10) and a shaft region (40), wherein the head region (10) has actuating surfaces (12), wherein the shaft region (40) extends along and around a longitudinal direction (L), wherein the shaft region (40) is cylindrical or at least substantially cylindrical and its cylinder axis lies in the longitudinal direction (L), wherein the shaft region (40) has a groove (44) introduced in a radial direction (R), which extends in particular parallel to the longitudinal direction (L), wherein the radial direction (R) is perpendicular to the longitudinal direction (L), wherein a stiffness reduction structure, in particular a recess (46) or an underfill (48), is provided in the shaft region (40) opposite the groove (44) or opposite + / - 60° to the groove (44).
3. Connecting means (1) or connecting means blank (2) according to claim 1 or 2, wherein the stiffness reduction structure is a female structure.
4. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure limits the threaded region (30) or the shaft region (40) in the radial direction (R).
5. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure is a structure extending in the longitudinal direction (L).
6. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure is a recess (36), in particular a bore, introduced into an end face (60), wherein the end face (60) delimits the connecting means (1) or the connecting means blank (2) in the longitudinal direction (L).
7. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure is surrounded in the longitudinal direction (L) by the threaded region (30) and / or the shaft region (40).
8. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure has a rectangular, round, in particular circular, or elliptical cross-section.
9. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure extends to a distal end of the threaded region (30) or the shaft region (40) in the longitudinal direction (L).
10. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the connecting means (1) is an eccentric screw, or wherein the connecting means blank (2) is an eccentric screw blank.
11. Connecting means (1) or connecting means blank (2) according to one of the preceding claims, wherein the stiffness reduction structure does not penetrate the connecting means (1) or the connecting means blank (2), in particular in the form of a recess (46) or an underfill (48).
12. A method for producing a connecting means (1), in particular according to claim 1 or according to one of claims 3 to 10, comprising the steps, • Providing a connecting means blank (2), in particular according to claims 2 to 9, • Inserting a thread into the shaft area (40) by means of two rolling tools (100) so that a thread area (30) is created, • wherein the introduction of the thread is carried out in particular in such a way that during the thread forming at one time point one rolling tool (100) covers the groove and at the same time the other rolling tool (100) covers the stiffness reduction structure.