Production-optimized threaded component

Abstract

The invention relates to a threaded component (1) which is in the form of a spindle or a nut, wherein: the threaded component (1) has a thread protrusion (3) which runs helically around a longitudinal axis (X); the thread protrusion (3) forms a plurality of thread sections (30) arranged in direct succession; every two successive thread sections (30) are spaced apart from one another along the longitudinal axis (X) by a section of a thread base (2), said section running helically around the longitudinal axis (X); within each thread section (30), the thread protrusion (3) is delimited by a first and a second longitudinal side (31, 32) running helically around the longitudinal axis (X); the protrusion width of the thread protrusion (3) extends between the two longitudinal sides (31, 32) and the protrusion height of the thread protrusion extends from the thread base (2) to the free end of the thread protrusion; the thread protrusion (3) has a protrusion height and / or protrusion width which changes within each individual thread section (30); the threaded component (1) has two halves which are separated by a separating plane in which the longitudinal axis (X) lies and which together form all thread sections (30) and which are each free of undercuts with respect to a direction running perpendicularly to the separating plane.

Description

[0001] Manufacturing-optimized threaded component

[0002] The invention relates to a threaded component according to the preamble of claim 1, a screw system comprising such a threaded component and a corresponding threaded component, and the use of an injection molding tool for the realization of such a threaded component.

[0003] In the prior art, screw systems of this type with corresponding threaded components are used in a wide variety of applications. One of the corresponding threaded components is designed as a spindle and thus has an external thread, whereas the other corresponding threaded component is designed as a nut and thus has an internal thread. For example, such screw systems are used in drive technology, such as for driving a slide of a linear sliding bearing, where the slide is guided linearly along a guide rail of the linear sliding bearing in a longitudinal direction and has a slide body section designed as a nut, which has an internal thread in which a spindle extending longitudinally with its longitudinal axis is arranged, which has an external thread. For driving or...Moving the carriage along its longitudinal axis, the spindle is driven by a motor, particularly an electric motor, causing it to rotate. The interlocking of the nut and spindle converts the spindle's rotation into a linear movement of the carriage along the guide rail in the longitudinal direction. Furthermore, screw systems can be used, for example, to fasten components together, where one component has a threaded component designed as a spindle, and the other component can be pressed onto the first component by means of the threaded component designed as a nut.

[0004] To provide the functionality required by a threaded component, a threaded component always has a threaded web that rotates around a longitudinal axis of the component. When the threaded components are screwed together, they are rotated relative to each other about their longitudinal axis, causing the threaded components to undergo a linear translation along the longitudinal axis due to the threaded web rotating around the longitudinal axis. In a screw system of this type, at least one of the corresponding threaded components must have such a threaded web rotating around the longitudinal axis. The threaded web of the other threaded component can also be designed to rotate around the longitudinal axis or have projections that, during the intended use of the screw system, i.e.,In an interlocking arrangement of threaded components, the threads slide on the rotating threaded rib of one component. Such a rotating threaded rib must therefore necessarily provide a sliding surface for the threaded rib of the corresponding component. Preferably, the sliding surface is designed such that the threaded components can be rotated continuously around their longitudinal axis with a constant rotational force, thus without any steps or discontinuities, while a relative force acting in one direction along the longitudinal axis acts on the two threaded components and thus presses them against each other along the longitudinal axis with their threaded ribs.Furthermore, such a threaded rib must provide sufficient stability to allow for a sufficient relative force to be applied along the longitudinal axis between the threaded components when they interlock, without the two components moving relative to each other along the longitudinal axis, thereby deforming or damaging the threaded ribs. Typically, a threaded component comprising such a rotating threaded rib is manufactured for this purpose by using a cylindrical base body into which the threaded rib is pressed. Such a cylindrical base body can, for example, be a hollow cylinder on whose inner surface the threaded rib is pressed to create an internal thread, or a hollow or solid cylinder on whose outer surface the threaded rib is pressed to create an external thread.After the embossing process, a threaded component with an internal thread is realized, in which the threaded shank is located on the inside of a hollow cylindrical outer body, or a threaded component with an external thread is realized, in which the threaded shank is located on the outside of a solid cylindrical core body, in particular. However, such embossing of the threaded shank onto a base body involves considerable manufacturing effort. Realizing a sufficiently robust threaded component using a casting process, such as injection molding or die casting, is complicated and expensive due to the curved shape of the threaded shank.

[0005] The present invention is based on the objective of providing a threaded component or screw system or use of an injection molding tool with which at least one disadvantage of generic threaded components or screw systems or uses can be at least partially eliminated.

[0006] As a solution to the problem underlying the present invention, the invention proposes a threaded component with the features according to claim 1. The threaded component is designed as a spindle or as a nut. The threaded component has a threaded web that rotates around a longitudinal axis in a spiral fashion. The threaded web forms several thread sections arranged directly one after the other. Each thread section is formed by a complete rotation of the threaded web around the longitudinal axis. Due to the directly successive arrangement of the thread sections one after the other, the threaded web is formed in the manner of a continuous helix. Two successive thread sections are spaced apart from each other by a thread root section that rotates around the longitudinal axis in a spiral fashion. The thread root thus separates two adjacent sections of the threaded web along the longitudinal axis.Accordingly, the thread root – just like the thread web – is shaped like a helix. Two successive thread segments, each forming a section of the thread web that represents a complete revolution of the thread web around the longitudinal axis, are spaced apart along the longitudinal axis by a section of the thread root that spirals around the longitudinal axis. With respect to the direction of travel around the longitudinal axis, the successive thread segments are directly adjacent to one another. Within each thread segment, the thread web is bounded by a first longitudinal side and a second longitudinal side that spiral around the longitudinal axis. The first and second longitudinal sides thus define the upper and lower ends of the thread web, respectively, in one direction and in opposite directions along the longitudinal axis.The two longitudinal sides each extend with their radial extent, perpendicular to the longitudinal axis, from the thread root to a free end of the threaded web. The free end and the end adjacent to the thread root thus define the radial boundary of the threaded web. Accordingly, the threaded web extends with its web width between its two aforementioned longitudinal sides and with its web height from the thread root to its free end. Web height and web width thus define the length of the threaded web perpendicular to its direction of travel, as it spirals around the longitudinal axis. The longitudinal sides always terminate in a section of the thread root provided on each longitudinal side adjacent to the threaded web.According to the invention, the threaded web has a web height and / or a web width that changes within each individual thread segment. The web height and / or web width thus change within each revolution of the threaded web around the longitudinal axis. When changing the web width, the change naturally refers to a change in the web width at a specific radius around the longitudinal axis within the revolution around the longitudinal axis. Furthermore, the threaded component has two halves separated by a parting plane, which together form all of the aforementioned thread segments and which are each designed without undercuts with respect to a direction perpendicular to the parting plane. The parting plane is a plane in which the longitudinal axis lies.In one embodiment, the threaded component has two separate halves, separated by the parting line and, for example, detachably connected. In another embodiment, the threaded component is designed as a single piece, so that the parting line is merely an imaginary plane containing the longitudinal axis, which divides the threaded component into two halves.

[0007] Because each half is designed without undercuts in a direction perpendicular to the parting line, all surface sections of each half are visible when viewed from that direction. The viewing direction for the first half is, of course, opposite to the viewing direction for the second half, although both viewing directions are perpendicular to the parting line. Due to the undercut-free design of each half, each half can be manufactured particularly easily using injection molding. For a one-piece threaded component, the entire component can thus be produced very simply with an injection mold consisting of two mold halves, each forming one half of the threaded component.The inventors have recognized that while conventional threaded components, in which the threaded web rotates around the longitudinal axis with constant web width and constant web height, cannot be easily manufactured using an injection molding tool, it is possible to realize the threaded component by varying the web width and / or web height so that it consists of two halves, each of which is designed without undercuts.For this purpose, for example, the web width on at least one edge terminating in the parting plane, and in particular on both edges terminating in the parting plane, of each half can be reduced to such an extent that an undercut is avoided, or the web height on the respective edge can be reduced to such an extent that an undercut is avoided, or web height and web width can be reduced together on the respective edge, so that at least one of the longitudinal sides forms an inclined surface section on at least one edge of at least one of the two halves. By selectively changing the web width and / or web height, a threaded component with a spirally circumferential thread web can thus be realized in which neither of its two halves has an undercut.

[0008] In one embodiment, at least one of the longitudinal sides of each thread segment in each half of the threaded component has a geometric shape resembling a smooth, egg-shaped surface over a predominant portion of its extent in that half. This surface includes a recess that reduces the web height and / or web width of the thread web. It should be noted that a typical helix has a smooth top surface on which an element sliding downwards along the helix, guided by the helix during its movement, is guided in an egg-shaped motion around the helix's longitudinal axis from top to bottom. The longitudinal axis runs from top to bottom.By giving at least one of its longitudinal sides a geometric shape resembling a smooth, rounded surface over a predominant portion of its length, it is ensured that a corresponding threaded component, with its corresponding threaded web or projection, can slide as smoothly as possible along the threaded component when it is rotated relative to the threaded component while in contact with the longitudinal side. The recess provided in the smooth rounded surface deliberately allows for a deviation from the smooth surface only at the level of the recess, thus ensuring the most uniform possible sliding of the corresponding threaded component over a predominant portion of the longitudinal side.

[0009] In one embodiment, the web height within each thread section varies by at least 10% of its average web height over the entire circumference of the thread web as it forms that thread section. The average web height of each thread section is thus the average web height over the entire circumference of the thread web, with the circumference of the thread web around the longitudinal axis forming the respective thread section. Preferably, the web height varies between 10% and 80%, and particularly between 20% and 70%, of the aforementioned average web height. In one embodiment, the web width is provided that, on the same radius within each thread section, it varies by at least 10% of its average web width over the entire circumference of the thread web as it forms that thread section.The average web width is thus a web width assigned to a specific radius, whereby the web width is averaged over the complete revolution of the threaded web around the longitudinal axis through which the threaded web forms the thread section, in order to determine the aforementioned average web width assigned to the specific radius. Preferably, the web width varies between 10% and 80%, and in particular between 20% and 70%, of the average web width assigned to the specific radius. The two aforementioned advantageous embodiments can preferably be combined or provided as alternatives to each other. By varying the web height and / or web width significantly within each thread section, undercutting can be effectively prevented. By limiting the web height and / or web width to a certain percentage of the mean web height or width, respectively, the web height and / or width can be limited to a certain percentage of the mean web height or width.If the average web width varies, it can be ensured that the threaded web maintains a sufficient width or height across every entire thread section to provide adequate stability throughout the entire thread section and thus across all consecutive thread sections. A variation in web height or width by a certain percentage of the average web height corresponds to a change in web height or width relative to the respective average value. Therefore, with a 10% variation, the web height or width will be between 90% and 110% of the average web height or width.

[0010] In one embodiment, the web height over the entire circumference of each thread section is continuously at least 10%, in particular at least 20%, in particular at least 30%, in particular at least 40% of a maximum web height of the respective thread section, wherein, in addition, the web width over the entire circumference of each thread section is continuously at least 10%, in particular at least 20%, in particular at least 30%, in particular at least 40% of a maximum web width of the respective thread section.Preferably, the web height over the entire circumference of each thread section is continuously at least 50%, in particular at least 60%, in particular at least 70% of the maximum web height of the respective thread section, while the web width over the entire circumference of the respective thread section is continuously at least 20%, in particular at least 30% of the maximum web width of the respective thread section, wherein the web width over parts of the circumference of the respective thread section is less than 70%, in particular less than 60%, in particular less than 50% of the maximum web width of the respective thread section.In one embodiment, the web width of each thread section is continuously at least 50%, in particular at least 60%, in particular at least 70% of the maximum web width of the respective thread section, while the web height over the entire circumference of the respective thread section is continuously at least 20%, in particular at least 30% of the maximum web height of the respective thread section and in circumference sections of the circumference is less than 70%, in particular less than 60% of the maximum web height.It is generally preferred that the web height in circumferential sections is less than 70%, in particular less than 60%, in particular less than 50% of the maximum web height of the respective thread section, and / or that the web width in circumferential sections is less than 70%, in particular less than 60%, in particular less than 50% of the maximum web width of the respective thread section, wherein preferably the circumferential sections are such sections in which at least one of the two longitudinal sides of the thread web within the thread section has a recess as explained in more detail herein, and / or preferably the said circumferential sections extend together over a total angular range of less than 180°, in particular less than 120°, and outside the circumferential section the web height and the web width are more than 70% of the maximum web height and web width, respectively.Preferably, both the web height and the web width are reduced in the thread sections, such that the web height in the thread sections represents a correspondingly reduced proportion of the maximum web height, and the web width represents a correspondingly reduced proportion of the maximum web width of the respective thread section. By ensuring that the web height and web width always maintain a minimum value over the entire circumference of each thread section, it is guaranteed that the thread web runs continuously over the entire circumference of each thread section, thereby ensuring particularly high stability of the thread web.

[0011] In one embodiment, the threaded web has a first recess on its first longitudinal side and a second recess on its second longitudinal side within each thread segment, with each recess extending over an angular range of less than 90° and more than 10°, particularly less than 60° and more than 20°. Preferably, the web width and / or web height decreases at the level of each recess within the range described above, or the web height and / or web width varies by the percentage described above over the extent of the respective recess. The extent of each recess is defined, with respect to the circumference of the threaded web within each thread segment, by the specified angular range, which is based on a rotation angle about the longitudinal axis.The inventors have recognized that by providing at least one recess on each of the two diverging longitudinal sides of each thread section, a threaded component with two undercut-free halves can be realized in a particularly simple and advantageous manner, while maintaining sufficient stability and simultaneously providing a sufficient sliding surface for a corresponding threaded component. It is particularly preferred that at least two recesses adjacent in the circumferential direction, and in particular all recesses, are spaced apart from each other by a rotational angle of at least 60°, and in particular at least 90°. This ensures both a sufficiently large sliding surface for a corresponding threaded component and sufficient stability of the thread web across the entire length of all thread sections.

[0012] In one embodiment, each thread section has at least one section of the first recess in its first half and at least one section of the second recess in its second half. In one embodiment, the first and second recesses are each formed jointly by the first and second halves of the threaded component, respectively; in another embodiment, the first recess is formed by the first half and the second recess by the second half. In one embodiment, the thread section has a third recess on its first longitudinal side and a fourth recess on its second longitudinal side, wherein, in particular, at least two recesses adjacent in the circumferential direction, and in particular all recesses, are spaced apart from each other by an angle of rotation of at least 60°, and in particular at least 90°.Preferably, the thread section has the same number of recesses on its first longitudinal side as on its second longitudinal side. Preferably, all recesses are spaced apart from each other. Thus, the web height and / or the web width has a local maximum between each pair of adjacent recesses. By providing at least a first and second recess, and in particular a first to fourth recess, the realization of a threaded component with two undercut-free halves can be achieved particularly easily and advantageously. Preferably, each thread section has at least one section of the fourth recess in the first half and at least one section of the third recess in the second half. Thus, each half has at least one section of one of the third and fourth recesses on each of its two longitudinal sides.In one embodiment, the third recess is formed by the second half, and the fourth recess is formed by the first half. In another embodiment, the first and fourth recesses are formed in the first half, and the second and third recesses of each thread segment are formed in the second half. Preferably, the first and fourth recesses are provided at opposite ends of the first half in a direction perpendicular to the longitudinal axis in the parting plane, and the second and third recesses are provided at opposite ends of the second half in a direction perpendicular to the longitudinal axis in the parting plane. In one embodiment, the recesses extend along the longitudinal axis at a certain radius over a depth that is at least 20% of the web width of the thread web at each end of the recess.The depth of the recess indicates its extension perpendicular to the direction of the thread web. By ensuring that the depth of the recess is at least 20%, in particular at least 30%, in particular less than 70%, in particular less than 60%, in particular between 20% and 70%, in particular between 30% and 60% of the web width of the thread web, an undercut-causing extension of the thread web can be particularly effectively prevented while maintaining sufficient stability of the thread web. In one embodiment, the parting line lies within the recesses, or the recesses terminate at the parting line. This can particularly effectively prevent an undercut in a critical area, namely in the region of each half adjacent to the parting line.In one embodiment, the recesses each form a longitudinal side section of one of the two longitudinal sides, with the other of the two longitudinal sides forming a helical sliding surface for a threaded web of a corresponding threaded component over at least a predominant part of the angular range across which the respective extension extends. Thus, the web height and / or web width of the threaded web at the level of the recess provided on one of the two longitudinal sides is reduced solely by virtue of the provision of the recess on that longitudinal side, whereas the course of the other longitudinal side at the level of the recess does not contribute to a reduction in the web width and / or web height compared to the area of ​​the threaded web adjacent to the recess.A generally preferred sliding surface is a helical segment-shaped surface, which forms the other longitudinal side as a smooth surface over at least the majority of the angular range across which the recesses of one longitudinal side extend, thus allowing the threaded web of a corresponding threaded component to slide without discontinuities. Preferably, the other longitudinal side has the same contour as the adjacent angular ranges on both sides of the angular range, at least over the majority of the angular range across which the respective recess extends.Thus, the recess provided on one of the two longitudinal sides can contribute to the undercut-free design of the two halves of the threaded component, while the other longitudinal side, at the level of the recess, forms a helical-segment-shaped sliding surface for a threaded web of a corresponding threaded component, so that the functionality of the threaded component is restricted as little as possible by the provision of the recess. Preferably, each of the two longitudinal sides of each thread segment forms a helical-segment-shaped sliding surface over a predominant part of its extent extending over the complete circumference of the thread segment, and forms at least one recess to a lesser extent outside the helical-segment-shaped sliding surface.

[0013] In one embodiment, the longitudinal sides each have at least one surface section curved about an axis of curvature, with a reduction in the web width and / or the web height. The axis of curvature has an angle of more than 45°, and in particular more than 60°, to the longitudinal axis. Preferably, a recess is provided within a certain extent, i.e., within the angular range, of the curved surface section. Preferably, each recess has at least one such curved surface section. In one embodiment, the curved surface section of a respective longitudinal side transitions via a convex curvature into an adjacent helically shaped surface section of the respective longitudinal side, which thus forms a section of the sliding surface of the respective longitudinal side.By providing such a surface section curved around a corresponding axis of curvature and the convex transition to the helical surface section, an undercut-free design can be ensured particularly effectively while maintaining high functionality of the threaded component. In one embodiment, the longitudinal sides each have several curved surface sections around an associated axis of curvature, with a reduction in web width and / or web height. These curved surface sections are directly adjacent to one another, and their axes of curvature are angled relative to each other, each forming an angle of more than 45° to the longitudinal axis. This allows for a particularly advantageous implementation of the undercut-free design of the two halves of the threaded component.Generally, preferably, the curved surface sections provided in the respective embodiment of each longitudinal side of each thread section extend jointly over at least one area which is at least 5%, in particular at least 10%, of an area A, wherein the area A is defined as A = 7i* r. 2 results in , where r indicates the radius of the outer diameter of the respective thread pitch .

[0014] In one embodiment, the threaded web has at least one recess within each thread segment, spaced apart from each of the longitudinal sides. The recess is thus located between the longitudinal sides. Accordingly, the provision of the recess has no influence on the web width, since the web width is defined by the extension length of the threaded web between the longitudinal sides. The recess allows for material savings and, in particular, simplifies manufacturing, as it minimizes changes in material thickness during the production of the threaded component. The recess is particularly preferably provided within an angular range over which a recess extends, which is provided on one of the two longitudinal sides.

[0015] In one embodiment, the threaded component is a plastic part manufactured using an injection molding process. In this embodiment, the threaded component is produced using an injection mold consisting of two mold halves. To create the plastic part, these halves are first moved linearly towards each other in a linear direction to form a closed shape, and then moved linearly apart in the opposite direction to eject the threaded component. Thus, in an advantageous embodiment, the threaded component is produced using a simple open-close mold. This can significantly simplify the manufacturing process. A particularly advantageous aspect is that the threaded component has two halves, each of which is designed without undercuts, as previously explained.The undercut-free design is a design that is free of undercuts with respect to the linear direction.

[0016] The invention further relates to a screw system comprising a threaded component according to the invention and a corresponding threaded component, wherein the corresponding threaded component has a threaded rib corresponding to the threaded web of the threaded component. The threaded rib can be shaped like a coil or formed by spaced-apart projections. In each case, the threaded component and the corresponding threaded component are designed to be screwed together such that the threaded rib of the corresponding threaded component slides on the threaded rib of the threaded component. Thus, the threaded components and the corresponding threaded component can be screwed together by the corresponding threaded rib sliding on the threaded rib of the threaded component, wherein the screwing action refers to the two corresponding threaded components being rotated relative to each other about their longitudinal axis.Due to the sliding of the corresponding threaded shank on the threaded shank, the rotation of the threaded components relative to each other results in a displacement of the threaded components relative to each other along the longitudinal axis. The invention relates in particular to a linear sliding bearing comprising a screw system according to the invention, wherein the linear sliding bearing has a guide rail and a slide, wherein the slide has a nut as one of the corresponding threaded components and a spindle as another corresponding threaded component, the spindle running with its longitudinal axis parallel to the guide rail, wherein the nut and / or spindle are designed as threaded components according to the invention.

[0017] The invention further relates to the use of an injection mold consisting of two mold halves for the production of a threaded component according to the invention. To produce the threaded component, in a first use step an injection mold is provided in which the two mold halves are moved linearly towards each other in a linear direction, and plastic is injected into the injection mold. In a subsequent second use step, after the plastic has at least partially hardened in the injection mold, the two mold halves are moved linearly apart in the opposite direction, and the threaded component is removed from the injection mold or from the two mold halves.

[0018] The various embodiments according to the invention can be combined particularly advantageously. In particular, the embodiments can each have features that are described in connection with other embodiments or with generic devices or uses.

[0019] Preferably, the threaded component can be a multi-start threaded component, thus comprising several threaded webs rotating around the longitudinal axis in a spiral fashion, wherein a spirally rotating thread root is arranged between each pair of threaded webs, and each threaded web can be designed as described for the single threaded web described herein. Preferably, the threaded component has a pitch between 1 and 30 mm, particularly between 1 and 10 mm. The pitch is defined as the distance between the first two longitudinal sides of two adjacent threads along the longitudinal direction. Preferably, the threaded component has a diameter at the level of the free end of its threaded web of 3 to 12 mm. Preferably, the ratio between pitch and diameter is between 10 and 0.3, particularly between 5 and 0.3.

[0020] The invention is explained in more detail below with reference to six figures and exemplary embodiments.

[0021] They show:

[0022] Figure 1: a schematic representation of a section of a design form of an inventive threaded component;

[0023] Figure 2: a schematic representation of a section of another embodiment of a threaded component according to the invention;

[0024] Figure 3: a schematic representation of a section of another embodiment of a threaded component according to the invention;

[0025] Figure 4: a schematic representation of a section of another embodiment of a threaded component according to the invention;

[0026] Figure 5: various schematic representations of principles showing different views of each section of a further embodiment of a threaded component according to the invention;

[0027] Figure 6: a schematic representation of a section of another embodiment of a threaded component according to the invention.

[0028] Figures 1-6 show various embodiments of a threaded component 1 according to the invention in different schematic diagrams. Each figure depicts a threaded component 1 designed as a spindle. The properties relevant to the invention of a threaded component 1 according to the invention, namely the variation in the web height and / or web width of the threaded web 3 in the different embodiments, can be provided analogously in other embodiments according to the invention, such as a threaded component 1 designed as a nut.For example, a nut according to the invention can be realized by first producing two halves of the nut, each forming the half of the threaded component described herein, after which these two halves are joined together, for example, permanently connected to each other, for example by gluing or welding, or detachably connected to each other, for example by directly unscrewing them or by arranging the halves in a fixing device that secures them to each other, wherein such a fixing device can be provided, for example, on a slide of a linear sliding bearing. While in one embodiment of a spindle according to the invention the threaded web 3 is arranged circumferentially around a solid or hollow cylindrical core body, in one embodiment of a nut according to the invention the threaded web is arranged on the inside of a hollow cylindrical outer body.The core body or outer body preferably forms the thread root 2 of the respective threaded component 1 in the respective embodiment.

[0029] The threaded component 1 according to Figure 1 has a threaded web 3 that rotates around a longitudinal axis X of the threaded component 1. The threaded web 3 consists of several thread segments 30 arranged directly one after the other. Each thread segment 30 is formed by exactly one complete rotation of the threaded web 3 around the longitudinal axis X. The term "thread segment" 30 thus denotes one complete rotation of the threaded web 3 around the longitudinal axis X. The threaded component 1 also has a thread root 2 that rotates around the longitudinal axis X. Two consecutive thread segments 30 along the longitudinal axis X are spaced apart from each other by a rotating section of the thread root 2 along the longitudinal axis X. Naturally, two consecutive thread segments 30 merge into one another due to their direct proximity.With respect to a direction along the longitudinal axis X, they are, however, spaced apart from each other at each height of the revolution by the thread root 2 during their respective revolution. In each thread section 30, the thread web 3 has a first longitudinal side 31 and a second longitudinal side 32. Correspondingly, each thread section 30 has a first longitudinal side 31 and a second longitudinal side 32. The two longitudinal sides 31, 32 are the sides of the respective thread section.

[0030] 30, which bound it along the longitudinal axis X and which point in opposite directions along the longitudinal axis X. The thread web 3 has a web width in each thread segment 30, which is defined by its extension length between the longitudinal sides 31, 32. This extension length, which defines the web width, results for each radius from the distance between the points of intersection of a straight line with the longitudinal sides 31, 32, which runs perpendicular to a line that circles the longitudinal axis at the height of the respective radius and is averaged over the circumference between the two longitudinal sides.

[0031] 31, 32 runs and thus corresponds to the direction of travel of the threaded web. Furthermore, the threaded web 3 has a web height within each thread section 30, which corresponds to the extension length of the threaded web from the thread root 2 to the free end of the threaded web 3, referenced to a radial direction R. As can be seen from Figure 1, within each thread section 30 the web height and the web width vary such that the threaded component 1 is formed by two halves, which are separated from each other by a parting plane, each being free of undercuts in a direction perpendicular to the parting plane. Figure 1 shows a view along this direction of one of the two halves of the threaded component 1. The parting plane runs parallel to the plane of the drawing.Figure 1 shows that the variation in web height and web width is achieved by each thread section 30 in the first half of the threaded component shown in Figure 1 having a first recess 310 on its first longitudinal side 31 and a second recess 320 on its second longitudinal side 32, with the recesses 310 and 320 each adjoining the parting plane. In the illustrated embodiment, the first and second recesses 310 and 320 are formed in the first half of the threaded component. In the second half, not shown in Figure 1, each thread section accordingly has a third recess on its first longitudinal side 31 and a fourth recess on its second longitudinal side 32, each opening into the parting plane from the other side, which is not shown in Figure 1.The first and second recesses 310, 320 are formed in the illustrated embodiment by three curved surface sections 311, 312, 313 and 321, 322, 323 respectively, which are directly adjacent to each other, wherein at least two of the curved surface sections have a curvature about an axis of curvature which forms an angle of more than 45° to the longitudinal axis X and which are angled towards each other.

[0032] Figure 2 shows a section of another embodiment of a threaded component 1. In this embodiment, the recesses 310, 320, where only the first recess 310 is shown in the depicted section, are configured differently. The first recess 310 is formed by only two curved surface sections 312, 314, wherein only one of the two curved surface sections 312, 314 is curved about an axis of curvature that has an angle of greater than 45° to the longitudinal axis X. The threaded component 1 according to Figure 2 has a particularly large sliding surface in its thread sections 30, i.e. Its longitudinal sides are to a particularly large extent formed in the manner of a smooth upper surface, however, due to the smaller number of curved surface sections, whose axis of curvature has a large angle relative to the longitudinal axis X, a sharper-edged culture is formed.

[0033] Figures 3 and 4 show further embodiments of a threaded component according to the invention. The embodiments differ from one another in terms of the diameter, the mean web width, and the pitch of the threaded web 3, resulting in different configurations of the respective first recess 310 and the second recess 320 on the two longitudinal sides 31, 32 of the threaded components 1.

[0034] In the embodiment shown in Figure 4, the first recess 310 and the second recess 320 overlap, so that they merge into one another. At the point of transition between the recesses 310 and 320, the web height of the threaded web 3 is reduced compared to the adjacent areas.

[0035] Figure 5, comprising figures 5a and 5b, shows another

[0036] Figure 5a shows an embodiment of a threaded component 1 according to the invention with a considerable pitch and considerable web width of the threaded web 3. Figure 5a, as in Figures 1-4, shows a view of a first half of the threaded component 1 along a direction perpendicular to the parting plane, and, just as in Figure 4, only one half of this first half, located on one side of the longitudinal axis X, is shown. Figure 5b shows a view of the threaded component 1 in a direction along the parting plane, such that one half of the first half and one half of the second half of the threaded component 1, separated from each other by the parting plane, are shown. Figure 5, comprising Figures 5a and 5b, shows that, with regard to the thread function to be achieved with the present embodiment, the recesses for varying the web height and web width are adapted.In the illustrated embodiment of a threaded component 1 according to the invention, each thread section 30 has a first recess 310 on its first longitudinal side 31 in the first half of the threaded component and a fourth recess (not shown) on its second longitudinal side. Each thread section 30 also has a third recess (not shown) on its first longitudinal side 31 and a second recess 320 on its second longitudinal side 32 in the second half of the threaded component. Figure 5b shows an exemplary embodiment of the first recess 310 with its various curved surface sections 315, 316, 317, 318. The recess 310 extends over a certain angular range around the longitudinal axis X, with a smooth, helical-shaped sliding surface provided outside the angular range on the first longitudinal side 31 of the thread section 30.The first recess 310 is formed as a discontinuity of the first longitudinal side 31, modifying the helical section shape. For the purpose of designing the first recess 31, it has several curved surface sections 315, 316, 317, 318, each directly adjacent to the other and each curved about an axis of curvature that forms an angle greater than 45° to the longitudinal axis X, with the different axes of curvature of the different curved surface sections also being angled relative to each other.

[0037] Figure 6 schematically illustrates another embodiment of a threaded component 1 according to the invention. Figure 6 shows the threaded component 1 in a view perpendicular to the aforementioned parting plane, looking at one half of the first half. Figure 6 shows that the threaded component 1 has a first recess 310 with similar properties to those described for the embodiment according to Figure 1. Furthermore, a recess 33 is formed in each thread section 30 at the level of the first recess 310, spaced apart from both longitudinal sides 31, 32 of the thread section 30. This recess 33 is, advantageously according to the invention, open in the radial direction R towards the outside of the threaded component 1. By providing this recess, material savings and simplified manufacturing of the threaded component 1 can be ensured without significantly reducing its stability. Ma / wj 2 June 2025

[0038] Applicant: igus GmbH, 51147 Cologne

[0039] Reference symbol list

[0040] 1 Threaded component

[0041] 2 Thread base

[0042] 3 threaded bridge

[0043] 30 thread section

[0044] 31 first long side

[0045] 32 second long side

[0046] 33 recess

[0047] 310 first exclusion

[0048] 311 curved surface section

[0049] 312 curved surface section

[0050] 313 curved surface section

[0051] 314 curved surface section

[0052] 315 curved surface section

[0053] 316 curved surface section

[0054] 317 curved surface section

[0055] 318 curved surface section

[0056] 320 second recess

[0057] 321 curved surface section

[0058] 322 curved surface section

[0059] 323 curved surface section

[0060] R radial direction

[0061] X Longitudinal axis

Claims

Claims 1. Threaded component (1) designed as a spindle or as a nut, wherein the threaded component (1) has a threaded web (3) which rotates around a longitudinal axis (X) in a turn-like manner, wherein the threaded web (3) forms several immediately successive thread sections (30), each formed by a complete rotation of the threaded web (3) around the longitudinal axis (X), wherein two successive thread sections (30) are spaced apart along the longitudinal axis (X) by a section of a thread root (2) rotating around the longitudinal axis (X) in a turn-like manner, wherein the threaded web (3) is bounded within each thread section (30) by a first and second longitudinal side (31, 32) rotating around the longitudinal axis (X) in a turn-like manner, each radially, i.e.perpendicular to the longitudinal axis (X) , from the thread base (2) to a free end of the thread web (3), wherein the thread web (3) extends with its web width between the two longitudinal sides (31, 32) and with its web height extends from the thread base (2) to its free end, characterized in that the thread web (3) has a . the threaded component (1) has a web height and / or web width that changes the individual thread section (30), wherein the threaded component (1) has two halves separated by a parting plane in which the longitudinal axis (X) lies, which together form all thread sections (30) and which are each designed without undercuts with respect to a direction perpendicular to the parting plane.

2. Threaded component (1) according to claim 1, characterized in that at least one of the longitudinal sides (31, 32) of each thread section (30) has in each half at least to a predominant part of its respective extent a geometric shape in the manner of a smooth turning surface in which a recess (310, 320) is provided by reducing the web height and / or web width of the thread web (3).

3. Threaded component (1) according to one of the preceding Claims, characterized in that the web height within each thread section (30) varies by at least 10% of its web height averaged over the circumference of the thread web (3) during the formation of the respective thread section (30), in particular between 10% and 80%, in particular between 20% and 70% of this averaged web height, and / or that the web width on the same radius within each thread section (30) varies by at least 10% of its web width averaged over the circumference of the thread web (3) during the formation of the respective thread section (30) on this radius, in particular between 10% and 80%, in particular varying between 20% and 70% of this average bridge width.

4. Threaded component (1) according to one of the preceding Claims, characterized in that the web height over the entire circumference of each thread section (30) is continuously at least 10%, in particular at least 20%, in particular at least 30% of a maximum web height of the respective thread section (30) and that the web width over the entire circumference of each thread section (30) is continuously at least 10%, in particular at least 20%, in particular at least 30% of a maximum web width of the respective thread section (30).

5. Threaded component (1) according to one of the preceding Claims, characterized in that the threaded web (3) has a first recess (310) on its first longitudinal side (31) within each thread section (30) and a second recess (320) on its second longitudinal side (32), wherein the recesses (310, 320) each extend over an angular range of less than 90° and more than 10°, in particular less than 60° and more than 20°, and in particular are spaced apart from each other by a rotation angle of at least 60°, in particular at least 90°.

6. Threaded component (1) according to claim 5, characterized in that each thread section (30) has at least one section of the first recess (310) in the first half and at least one section of the second recess (320) in the second half, wherein in particular each thread section (30) has a third recess on its first longitudinal side (31) and a fourth recess on its second longitudinal side (32), wherein in particular all recesses are spaced apart from each other, wherein in particular each thread section (30) has at least one section of the fourth recess in the first half and at least one section of the third recess in the second half.

7. Threaded component (1) according to claim 6, characterized in that the first and fourth recesses are formed in the first half and the second and third recesses of each thread section (30) are formed in the second half, wherein in particular the first and fourth recesses are provided in a direction perpendicular to the longitudinal axis (X) in the parting plane at opposite ends of the first half and the second and third recesses are provided in the direction perpendicular to the longitudinal axis (X) in the parting plane at opposite ends of the second half.

8. Threaded component (1) according to one of claims 5 to 7, characterized in that the recesses (310, 320) extend at a certain radius along the longitudinal axis (X) over a depth that is at least 20% of the web width of the The threaded web (3) at each end of the recess (310, 320) is .

9. Threaded component (1) according to one of claims 5 to 8, characterized in that the parting plane lies in the recesses (310, 320) or the recesses (310, 320) end at the parting plane.

10. Threaded component (1) according to one of claims 5 to 9, characterized in that the recesses (310, 320) each form a longitudinal side section of one of the two longitudinal sides (31, 32), wherein the other of the two longitudinal sides (31, 32) forms a helical-section-shaped sliding surface for a threaded web (3) of a corresponding threaded component (1) over at least a predominant part of the angular range over which the respective recess (310, 320) extends.

11. Threaded component (1) according to one of the preceding claims, characterized in that the longitudinal sides (31, 32) each have at least one surface section (311, 312, 313, 314, 315, 316, 317, 318, 321, 322, 323) curved about an axis of curvature, with the reduction of the web width and / or web height, wherein the axis of curvature has an angle of more than 45°, in particular more than 60°, to the longitudinal axis (X), wherein the curved surface section (311, 312, 313, 314, 315, 316, 317, 318, 321, 322, 323) of a respective longitudinal side extends via a convex curvature into an adjacent helically segment-shaped surface section of the respective longitudinal side (31, 32) transitions, wherein in particular the longitudinal sides (31, 32) each have several surface sections (311, 312, 313, 314, 315, 316, 317, 318, 321, 322, 323) curved about an axis of curvature assigned to them, with a reduction of the web width and / or web height, which are directly adjacent to each other and whose axes of curvature are angled to each other and each have an angle of more than 45° to the longitudinal axis (X).

12. Threaded component (1) according to one of the preceding claims, characterized in that the threaded web (3) has at least one recess (33) within each thread section (30) which is spaced apart from each of the longitudinal sides (31, 32).

13. Threaded component (1) according to one of the preceding claims, characterized in that the threaded component (1) is a plastic component produced by injection molding, wherein in particular the production of the threaded component (1) is carried out by means of an injection molding tool which consists of two mold halves which, to produce the plastic component, are first moved towards each other in a linear direction to create a closed form and are then moved apart in the opposite direction to eject the threaded component (1).

14. Screw system comprising a threaded component (1) according to one of the preceding claims and a corresponding threaded component that connects to the The threaded web (3) of the threaded component (1) has a corresponding threaded web, wherein the threaded component (1) and the corresponding threaded component can be screwed together by sliding the corresponding threaded web on the threaded web (3).

15. Use of an injection mold consisting of two mold halves for the realization of a threaded component (1) according to any one of claims 1 to 13.

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