Spiral element with spacing geometry

Abstract

The invention relates to a screw element with preassembled gaskets and a method for coating and manufacturing screw elements. The gaskets are advantageously positioned and held in the spacing region configured between them by means of spacing geometry and a corresponding thread.

Description

Technical Field

[0001] The present invention relates to a spiral element having a pre-assembled gasket and a method for coating and manufacturing the spiral element. Background Technology

[0002] Helical components are typically supplied with pre-assembled gaskets. For example, corresponding helical components are known from DE102021105698A1 or DE102019209510A2. These combined helical components are particularly used for pre-tightening workpieces, such as in the automotive industry. High requirements are placed on the helical components, especially regarding their machining and dimensional tolerances. For defective helical components, additional technical characteristics such as screw-in value or corrosion resistance are also crucial.

[0003] To achieve the necessary properties, both the screw and the gasket often need to be coated to suit the specific application. Especially for screw components with pre-assembled gaskets, a completely uniform coating is typically complex and costly. Here, the screw and gasket are usually coated separately and then assembled, which is costly, to prevent them from sticking together during coating. This subsequent assembly further complicates the manufacturing of the screw and limits the processing steps.

[0004] The use of a non-closed shim along the circumferential direction applied subsequently to the rolled spiral also has drawbacks, as such shims often do not meet technical requirements and create additional working steps. Therefore, a closed shim that is continuous along the circumferential direction is preferred.

[0005] As noted by the aforementioned drawbacks, the auger must be coated together with the gaskets arranged on the auger shank to achieve economical manufacturing or coating without additional steps. However, the auger and gaskets often stick together during coating, resulting in undesirable technical characteristics regarding the coefficient of friction, conductivity, and corrosion resistance. Specifically, the gaskets may adversely adhere to or at least partially attach to the auger body at, for example, the auger head, the thread start, or other sections. This leads to undesirable changes in the coefficient of friction during tightening. Furthermore, critical sections may be insufficiently coated or not coated at all, negatively impacting or reducing corrosion resistance.

[0006] This results in defective spiral elements with insufficient coating on the auger or gasket. Spiral elements with adhered gaskets cannot be used for assembly, especially in demanding workpieces. Even if the adhesion is removed after coating, the section is not fully machined or is insufficiently machined because the gasket, located in an undesirable position, obstructs coating on the spiral body or is itself insufficiently coated.

[0007] The corrosive head of the screw, which is located on the outside of the workpiece after assembly, should be coated particularly evenly and thoroughly. Therefore, it is especially important to prevent the gasket from sticking to the screw head during coating, which, under adverse conditions, may come into contact with or adhere to the screw head during coating. Furthermore, the gasket may also adhere to the screw shaft in undesirable locations.

[0008] To prevent these drawbacks when coating helical elements with pre-assembled gaskets, spacer holders are typically assembled at high cost before coating. These spacer holders hold the helical element in a specific position for coating, particularly spaced apart from the helical head and the corresponding abutment surface at the helical head for assembly. The spacer holders can be separated from the helical element during coating. This is particularly applicable in coating methods with high mechanical loads, such as roller coating methods. Furthermore, the spacer holders must be removed again at high cost in an additional working step after coating or before assembly.

[0009] An alternative to uniformly coating a pre-assembled spiral element is to provide it within a support. Here, the spiral element, along with a gasket, is suspended or correspondingly inserted into the support, such that the gasket is held spaced apart from the spiral head during coating. However, this method is also costly and expensive. Furthermore, the coated spiral element must be painstakingly removed from the support. Additionally, components of the support may also be undesirably coated, requiring additional cleaning of the support. Summary of the Invention

[0010] Therefore, the object of the present invention is to at least partially eliminate, and in particular completely eliminate, the disadvantages listed in the prior art. Furthermore, the object of the present invention is to provide an improved method for coating and manufacturing helical elements. In particular, the object of the present invention is to provide an improved helical element with a pre-assembled gasket having desired technical characteristics. Furthermore, the object of the present invention is to provide a helical element that can be economically and easily coated uniformly together with a gasket. Furthermore, the object of the present invention is to provide a helical element that is uniformly and sufficiently coated, or is capable of being coated, particularly in the region of the helical head.

[0011] The present objective is achieved by utilizing the features of the parallel claims. Advantageous improvements to the invention are specified in the dependent claims. All combinations of at least two features given in the specification, claims, and / or drawings also fall within the scope of the invention. Values ​​within a given range should also be considered as critical values ​​to be disclosed and protected in any combination.

[0012] Therefore, the present invention relates to a helical element having at least: i) a helical shank having a helical head, ii) a spacer protrusion spaced apart from the helical head, the spacer protrusion having a diameter at the helical shank, and iii) a threaded portion having an outer diameter at the side of the spacer protrusion opposite to the helical head, and iv) a gasket pre-assembled on the helical shank and disposed between the spacer protrusion and the threaded portion, the gasket having a gasket inner diameter, wherein the gasket inner diameter is smaller than the diameter of the spacer protrusion and smaller than the outer diameter of the threaded portion, such that the gasket is disposed in a spaced region between the spacer protrusion and the threaded portion along the helical shank relative to the helical head at a certain interval to prevent disengagement.

[0013] In other words, the diameter of the spacer protrusion and the outer diameter of the threaded portion are both larger than the inner diameter of the gasket, so that the gasket is held between the spacer protrusion and the threaded portion in a pre-assembled manner in the spacer region or in the coating position. Here, the inner diameter of the gasket is chosen in particular so that the gasket can move along the rod within the spacer region between the threaded portion and the underside of the spacer protrusion. Furthermore, during assembly, the gasket can be advantageously pressed past the abutment protrusion under a pre-given force, thereby pressing the gasket toward the helical head or the abutment surface of the helical head at the end of the rod.

[0014] The spacer protrusions can extend over the entire perimeter or be constructed only in partial sections. When coating the helical element, the spacer protrusions advantageously pre-define or define the position of the shim at the shank of the helical element upwards. The threaded portion defines the position of the shim downwards towards the tip or end of the helical element, preventing the shim from slipping off the shank.

[0015] In this way, the upper and lower limits of the shim at the shank of the helical element can be advantageously predetermined for coating. Therefore, easy and cost-effective coating of the helical element can be achieved. Here, the shim is held in an advantageous position for coating, enabling complete and sufficient coating. Furthermore, the shim, which is resistant to detachment but can be guided along the shank, can also change position within the limits, allowing the entire spaced area at the shank to be coated.

[0016] This allows for complete and uniform coating using easy and commonly used coating methods without adhesion. Furthermore, it reduces manufacturing defects and provides the desired properties to the helical element in terms of corrosion resistance and conductivity. Additionally, it enables easy assembly of the coated helical element and allows for advantageous pre-determining of the coefficient of friction.

[0017] Here, the spacer protrusion is a spacer geometry of arbitrary shape. The shank of the helical element is the longitudinal portion connecting the head and the threaded portion. The head of the helical element is the upper portion, typically used for tightening or loosening the helical element. The spacer protrusion is a thickened portion at the shank of the helical element, spaced apart from the head and having a defined diameter. The threaded portion is located on the side of the spacer protrusion opposite to the head and is used to screw the helical element into a workpiece. The gasket is an annular component pre-assembled on the shank of the helical element and arranged between the spacer protrusion and the threaded portion.

[0018] Another advantage of spiral elements is that the gasket is held in a defined position to prevent sticking during coating and to ensure even coating. Furthermore, the gasket is positioned securely between the spacer protrusion and the threaded portion, which facilitates the handling and assembly of the spiral element.

[0019] In a preferred embodiment, by tightening the helical element during assembly, the gasket can move over the spacer protrusion and abut against the gasket abutment surface at the head of the helical element. In other words, tightening over the head of the helical element allows the gasket to clip over the spacer protrusion and then abut against the head of the helical element. This particular design allows the gasket to move purposefully along the shank of the helical element, thereby occupying a defined position during the assembly process. Here, the spacer protrusion at the shank of the helical element acts as a guide element, which initially holds the gasket relative to the head of the helical element at a predetermined interval. Then, in the actual assembly, by tightening the helical element with an advantageously predetermined tightening force, the gasket moves over the spacer protrusion and finally abuts against the gasket abutment surface at the head of the helical element. This movement ensures that the gasket is securely and reliably positioned between the head of the helical element and the threaded portion after assembly. Another advantage of this structure is that the gasket is pre-assembled onto the stalk of the helical component in a manner that prevents detachment, by using an inner diameter smaller than that of the spacer protrusions and the threaded portion. This means that the gasket will not accidentally slip off the stalk of the helical component, making the handling and support of the helical element easier before actual assembly. Furthermore, the feasible arrangement of moving the gasket over the spacer protrusions and abutting against the head of the helical component ensures that the gasket occupies a stable and secure position after assembly, thereby improving the reliability and strength of the entire helical connection. Therefore, this implementation provides improved handling and functionality of the helical element by ensuring precise positioning of the gasket during the coating process and reliable fixation of the gasket after assembly.

[0020] In a preferred embodiment, a pre-defined interval is constructed along the stalk of the auger between the gasket abutment surface at the auger head and the spacer protrusion, wherein the interval is axially greater than the gasket height. This particular design enables precise positioning of the gasket along the stalk, thereby holding the gasket relative to the auger head at the defined interval. The pre-defined interval ensures that the gasket does not contact the auger head during the coating process, preventing the two components from sticking together. This is particularly advantageous because it allows the technical properties of the auger element, such as the coefficient of friction and conductivity, to be consistently maintained and improves corrosion resistance. The greater axial height of the interval compared to the gasket height ensures that the gasket remains within the interval even after passing the spacer protrusion and can only move within the interval. Here, the gasket is advantageously held in position downwards by the spacer protrusion after moving past it. This contributes to the gasket's anti-detachment properties and ensures that the gasket remains in the desired position during subsequent use of the auger element. The high quality of the coated spiral element is ensured by using pre-defined intervals or segment heights.

[0021] In a preferred embodiment, the axial height of the spacer region is greater than the height of the gasket, preferably at least 1.2 times, and more preferably at least 1.5 times, such that the gasket can be held within the spacer region in a manner that allows it to move freely along the auger shank. This specific design of the spacer region ensures that although the gasket is pre-assembled onto the auger shank, it is not rigidly fixed in place, but rather can move freely within the defined spacer region. This allows for flexible adaptation of the gasket position during the coating process of the auger element, thereby preventing the gasket from sticking to the auger shank or the auger head. The advantage of this structure is that the gasket is held in a defined position to prevent sticking during coating of the auger element and to ensure uniform coating of the auger element.

[0022] The larger spacing ensures sufficient clearance for the gaskets, preventing adverse effects from coating and resulting in a uniform and high-quality coating across the entire spiral element. Furthermore, the free movement of the gaskets within the spacing allows for optimal positioning during assembly and subsequent use of the spiral element. This helps prevent the adverse effects on technical properties of the spiral element, such as the coefficient of friction and conductivity, due to undesirable gasket fixation. Therefore, this invention specifically addresses the problem of undesirable adhesion and resulting technical variations that can occur in conventional spiral elements. Through the innovative design of the spacing and the specific dimensional determination relative to the gasket height, a reliable and efficient solution is provided for the described problems.

[0023] In a preferred embodiment, the height is set to be at least as large as the height of the spacing region. This particular configuration ensures that the gasket can move to a certain extent along the rod in both regions, which is crucial to prevent the gasket from sticking to the screw head during the coating process and to facilitate assembly.

[0024] Here, both the segment height and the spacing region height are greater than the shim height along the axial direction. This pre-defined, movable positioning of the shim in both regions ensures uniform coating application without the need for additional spacer holders or expensive special processes. This improves the quality and consistency of the coated spiral element. The segment height and the spacing region height are therefore critical parameters, guaranteeing the functionality and reliability of the spiral element during coating and assembly. This structure provides a cost-effective solution to the challenges of coating spiral elements with pre-assembled shims and contributes to improved technical properties and durability of the coated product.

[0025] In a preferred embodiment, the helical element is configured with a spacing region diameter and a segment diameter, both of which are the same size. This embodiment relates to the geometry of the helical element, particularly the diameters of different regions of the helical shank. In other words, except for the thickening achieved by the spacing protrusions, the helical shank has the same diameter from the helical head to the threaded portion. This allows the helical element to be easily manufactured with fewer production steps. Furthermore, the gasket can move in the same manner within both the spacing region and the segment. Moreover, the consistent diameter advantageously ensures that the gasket can be guided from the spacing region to the segment via the spacing protrusions during assembly. Achieving a uniform geometry for the helical shank through the consistency of these diameters brings several advantages.

[0026] One advantage lies in the improved stability and strength of the helical element, as sudden diameter changes are avoided, which could potentially create weak points in the material. Another advantage is the simplified manufacturing process, as the uniform geometry enables easier and more consistent production. This reduces production costs and improves product quality. Furthermore, the uniform geometry facilitates the pre-assembly of gaskets, which can be pushed onto the helical rod without requiring significant force. Overall, this implementation provides an optimized combination of mechanical stability, manufacturing friendliness, and functional reliability, thereby improving the efficiency and quality of the helical element.

[0027] In another preferred embodiment, the segment diameter is larger than the spacing region diameter. In other words, the segment diameter is slightly larger than the spacing region diameter. The helical element can advantageously hold the gasket with a larger gap in the spacing region in this way, making defect-free coating advantageously achievable. Furthermore, the slightly larger segment diameter better guides the gasket during assembly, preventing tilting.

[0028] In a preferred embodiment, the gasket is constructed with a tapering shape towards the spacer protrusions on its inner side. In other words, the inner diameter of the gasket towards the head of the auger, or towards the thickened portion, is larger than the inner diameter of the gasket towards the threaded portion at the other end. Therefore, the cross-section of the gasket decreases towards the spacer protrusions because the inner diameter of the gasket increases. Here, a chamfer with a chamfered inner diameter is preferably involved. This chamfer can also be constructed over the entire height of the auger. Furthermore, it is conceivable to have multiple chamfers with an inner diameter that decreases towards the spacer protrusions.

[0029] This specific design of the gasket enables an improved interaction between the gasket and the spacer protrusions of the helical element. The tapered inner portion of the gasket ensures that the gasket slides more easily over the spacer protrusions when pushed onto the helical shank and is reliably secured in a predetermined position, preventing it from slipping back over the spacer protrusions during assembly. This also facilitates complete coating of the gasket during the coating process and prevents the gasket from sticking to the helical head. The tapered inner portion of the gasket also facilitates pushing the gasket onto the helical shank during pre-assembly, further facilitating the handling and assembly of the helical element. Overall, this implementation provides an improved solution to the challenges of coating helical elements with pre-assembled gaskets by ensuring reliable and stable positioning of the gasket while optimizing machining and assembly processes.

[0030] In a preferred embodiment, the gasket has at least two, preferably three or more, protruding gasket protrusions along its inner diameter on the side facing the threaded portion, wherein the inner envelope diameter of at least two of the gasket protrusions is smaller than the diameter of the spacer protrusion. In other words, the gasket protrusions form small protrusions or protruding elements that protrude inward toward the tip of the screw with the smallest possible inner diameter of the gasket, such that the small protrusions or protruding elements can abut against the threaded portion in a pre-assembled position and can be positioned on the spacer protrusion in the section after the gasket has moved past the spacer protrusion. This involves at least two gasket protrusions, preferably three, and more preferably at least four gasket protrusions. The gasket protrusions are preferably arranged in a manner that is uniformly distributed along the circumferential direction within the inner region.

[0031] In one embodiment, the gasket protrusion is constructed as a protrusion. In other words, this relates to a protruding, elongated resistance element having a square and elongated cross-section. Here, the protrusion can have a smaller diameter on the side facing the threaded portion, the diameter preferably decreasing towards the head of the screw, so that the protrusion can be positioned particularly well on the threaded portion.

[0032] In another embodiment, the gasket protrusion is corrugated. In other words, the gasket protrusion is a wavy, protruding line. Here, the corrugations are of uniform diameter, such that the wavy, protruding lines form the gasket protrusion. The corrugations can extend circumferentially at the gasket. Therefore, the threaded portion can be advantageously supported on the troughs.

[0033] Alternatively, the corrugations are constructed axially or horizontally along the gasket, such that multiple wavy lines are constructed along the periphery. Here, the threaded portions are located at the beginning of the wavy shape.

[0034] Here, these protruding gasket protrusions serve as additional locking elements, stabilizing the position of the gasket on the shank of the helical element. By arranging the gasket protrusions, undesirable slippage or jamming of the gasket within the spacer area is additionally prevented during the coating process or handling of the helical element. The inner envelope diameter of the gasket protrusion is smaller than the diameter of the spacer protrusion, ensuring that the gasket is securely held between the spacer protrusion and the threaded portion. This ensures that the gasket remains in a defined position, preventing the gasket from sticking to the helical element during the coating process. An advantage of this structure is that, despite the protruding gasket protrusions, the gasket can still be easily pushed onto the shank of the helical element because the gasket protrusions are flexible enough to allow for some extension, yet still possess sufficient strength to better retain the gasket in position, in addition to its smaller inner diameter. Another advantage is that the protruding gasket protrusions can be guided along the shank of the helical element. Here, the gasket protrusions also prevent the gasket from tilting in the area where the shank is located.

[0035] In a preferred embodiment, the spacer protrusions are constructed continuously along the circumferential direction over the entire diameter. In other words, the protrusions, or thickenings, are constructed continuously over the entire diameter of the spacer protrusions. Preferably, the spacer protrusions are constructed uniformly along the circumferential direction in cross-section. In particular, the spacer protrusions do not have cuts or interruptions. This specifically means that the spacer protrusions exhibit a continuous and uniform increase along the entire circumference of the auger shank. This continuous construction of the spacer protrusions ensures uniform force distribution and improves the stability of the pre-assembled gaskets. Furthermore, the continuous construction of the spacer protrusions simplifies the manufacture of the auger element, as complex and costly molding processes are not required. Uniform geometry can be achieved efficiently and cost-effectively through standardized deformation or machining methods.

[0036] Here, the spacer protrusion can also have a smaller diameter toward the gasket in a certain embodiment, so that the gasket can move easily and guided over the spacer protrusion during assembly.

[0037] In another embodiment, the spacer protrusion has a larger diameter at its center along the axial direction than at its upper and lower ends. In other words, the spacer protrusion is circular or convex in cross-section. This allows for easy and guided transfer during assembly.

[0038] In a preferred embodiment, the helical element, preferably the entire helical element, is coated. This coating can take various forms, including but not limited to anti-corrosion coatings, friction-optimizing coatings, or electrical insulation coatings. Coating the helical element offers several advantages. One advantage is improved corrosion resistance, which extends the service life of the helical element and enhances its reliability in corrosive environments. Another advantage is reduced friction during assembly, resulting in more uniform and controlled tightening forces. This is particularly important in applications requiring precise tightening torque. Coating can also help improve or reduce conductivity depending on the specific requirements of the application. Coating the entire helical element ensures that all parts of the helical element, including the helical head, helical shank, gasket, and threaded portion, are uniformly protected and optimized. This contributes to the overall performance and durability of the helical element and makes it a versatile solution for a variety of applications.

[0039] Furthermore, the present invention relates to a method for manufacturing a helical element, particularly according to the invention, having a pre-assembled gasket. The method comprises at least the following steps, particularly in the following order: a) providing a helical element having a helical head and a helical shank; b) generating a spacer protrusion at the helical shank having a diameter; c) applying a gasket having an inner diameter to the helical shank; d) generating a thread at the helical shank having an outer diameter on the side of the spacer protrusion opposite to the helical head, particularly by rolling, wherein the inner diameter of the gasket is smaller than the diameter of the spacer protrusion and smaller than the outer diameter of the thread, such that the gasket is held securely in the spacer region between the spacer protrusion and the thread. In other words, the gasket is applied after the spacer protrusion is generated and held in the spacer region by generating the thread.

[0040] First, a helical element with a helical head and a helical shank is provided. Then, a spacer protrusion with a defined diameter is formed on the helical shank. Next, a shim with a defined inner diameter is applied to the helical shank. Finally, a threaded portion is formed on the side of the spacer protrusion facing away from the helical head, wherein the outer diameter of the threaded portion is larger than the inner diameter of the shim. These steps ensure that the shim is held securely in the spaced area between the spacer protrusion and the threaded portion. In this way, a helical element with a pre-assembled shim can be advantageously provided, wherein the spacer protrusion advantageously spaces the shim from the helical head at a defined interval. Furthermore, the secure assembly achieved by the specific arrangement of the shim between the spacer protrusion and the threaded portion facilitates the manipulation and use of the helical element in various applications. The use of deformation techniques, such as pressing or rolling, for producing the spacer protrusion and threaded portion also contributes to the robustness and reliability of the helical element. Overall, the manufacturing method provides an innovative solution to the challenges of coating and assembling helical elements with pre-assembled shims.

[0041] In a preferred embodiment, the method includes the additional step of: e) coating a helical element with pre-assembled gaskets, wherein the gaskets are spaced apart from the head of the helical element in the spaced regions. In other words, the entire helical element is coated, wherein the gaskets are held relative to the head of the helical element at a defined interval, pre-given by the spacer protrusions. This additional step ensures that the gaskets remain in a defined position during the coating process, thereby preventing the gaskets from sticking to the helical element. This is particularly advantageous because it improves the technical characteristics of the coated helical element by minimizing variations in the coefficient of friction and conductivity and optimizing corrosion resistance. The spacer protrusions at the shank of the helical element ensure that the gaskets are held at a fixed interval relative to the head of the helical element, which enables uniform coating of the helical element. The gaskets are held in place in a position between the spacer protrusions and the threaded portion, which significantly simplifies the handling and coating process. This method eliminates the need for additional spacer holders or expensive special processes that have been required to hold the gaskets in place until now. Furthermore, the additional step of assembling the gaskets after coating is eliminated, which improves the efficiency of the overall manufacturing process. Coated spiral components with pre-assembled gaskets can be used directly in predetermined applications without additional assembly steps. This reduces production costs and improves product quality. Therefore, the method provides a cost-effective and technically improved solution for coating spiral components with pre-assembled gaskets.

[0042] In a preferred embodiment of the method, the spacer protrusions at the shank of the helical member are generated by deformation (Umformung), preferably by pressing or rolling, or by machining. Pressing or rolling are deformation methods in which the material of the shank of the helical member is plastically deformed to produce the spacer protrusions. These methods are particularly advantageous because they ensure high dimensional accuracy and surface quality while simultaneously improving the mechanical properties of the material.

[0043] The spacer protrusions are seamlessly integrated into the stalk of the helical component by pressing or rolling, which improves the strength and stability of the connection.

[0044] Alternatively, spacer protrusions can be produced by machining, specifically by removing material through milling, turning, or drilling to achieve the desired geometry. Machining offers the advantage of enabling complex shapes and precise tolerances, which is particularly important when there are specific requirements for the geometry of the spacer protrusions. The choice of manufacturing method depends on the specific requirements of the application, with each method offering its own advantages. The spacer protrusions play a crucial role in positioning the gasket between the spacer protrusions and the threaded portion. Precise manufacturing of the spacer protrusions ensures that the gasket is held securely relative to the auger head with a defined interval. This prevents the gasket from sticking to the auger head during the coating process and enables uniform coating of the auger element.

[0045] In a preferred embodiment, the diameter of the spacer protrusion is larger than the pre-rolling diameter of the helical element before the thread is formed, allowing the shim to be pushed onto the helical shank in a defined step. The spacer protrusion at the helical shank has a larger diameter than the original diameter of the helical element before thread rolling. This enables the shim to be pushed onto the helical shank before thread rolling.

[0046] Furthermore, the present invention relates to a method for coating a helical element, the method comprising at least the following steps: A) providing a helical element according to the invention, and B) preferably coating the helical element by roller coating, wherein, in step B), during coating, a pre-assembled gasket is held spaced apart from the head of the helical element by spacer protrusions in the spacer region. In other words, the aforementioned helical element according to the invention is provided and coated thereon, wherein the gasket is held in a movable manner in the spacer region. The main advantage of the invention is that the gasket is held in a defined position to prevent adhesion during coating of the helical element and to coat the helical element. A specific arrangement of the gasket between the spacer protrusions and the threaded portion ensures that the gasket does not come into contact with the head of the helical element during the coating process, which prevents the gasket from adhering to the head of the helical element and therefore does not negatively affect the technical characteristics of the helical element, such as the coefficient of friction, conductivity, and corrosion resistance. This enables uniform and high-quality coating of the helical element without the need for additional spacer holders or expensive special processes. Roller coating, as the preferred coating method, offers the advantages of efficient and cost-effective coating because multiple helical elements can be coated simultaneously. Therefore, the present invention helps to improve the manufacturing process and significantly reduce the cost and expense of coating spiral elements with pre-assembled gaskets. Attached Figure Description

[0047] Further advantages, features, and specific details of the invention will become apparent from the following description of preferred embodiments and from the accompanying drawings. In these drawings: Figure 1 An embodiment of a helical element is schematically illustrated, the helical element having a helical shank, a helical head, a spacer protrusion, a threaded portion, and a pre-assembled gasket. Figure 2 The illustration schematically depicts an embodiment of a helical element screwed into a workpiece, wherein a washer is held spaced apart from the head of the helical element. Figure 3 The schematic diagram shows the assembled according to Figure 2 Spiral element, Figure 4 An embodiment of a gasket having an inner diameter D2 and an outer diameter Ds is schematically shown. Figure 5 A second embodiment of the gasket is schematically shown, the gasket having an inner diameter D2 within the range of height H1, a second gasket inner diameter D3, and a chamfer. Figure 6 A detailed embodiment of a gasket is schematically illustrated, the gasket having an inner diameter D2 and gasket protrusions having an envelope circle diameter disposed thereon. Figure 7 The diagram is schematically shown in another view according to Figure 6 Implementation method, Figure 8 An embodiment of a gasket is schematically shown, the gasket having at least two protruding gasket protrusions on its inner side. Detailed Implementation

[0048] In the drawings, identical components or components with the same function are labeled with the same reference numerals. All drawings are intended to be exaggerated for illustrative purposes, and therefore do not necessarily reflect the actual scale of the embodiments.

[0049] Figure 1 A detailed view of the helical element 1 together with the pre-assembled gasket 8 is shown. The helical element 1 includes a helical shank 2 extending from the helical head 3 to the threaded portion 5. The helical element 1 has a central axis 9. Here, the helical head 3 has an abutment surface for the gasket 8 on the side facing the helical shank 2. The helical head 3 is provided with a drive element 10 for torque transmission.

[0050] Furthermore, on the side of the spiral head 3 facing the spacer protrusion 4, a head abutment chamfer 11 corresponding to the chamfer 12 of the gasket 8 is constructed in the section 6, which enables the gasket 8 to be advantageously and fully abutted in the assembled state.

[0051] A spacer protrusion 4 with a diameter d2 is present at the shank 2 of the helical component, spaced apart from the head 3 of the helical component. The spacer protrusion 4, together with the shank 2, forms a segment 6 with a height h1. The diameter d4 of this segment is smaller than the diameter d2 of the spacer protrusion 4 and smaller than the inner diameter D2 of the gasket. A spacer region 7 with a height h2 is arranged between the spacer protrusion 4 and the threaded portion 5. The spacer region 7 has a diameter d3, which is smaller than the diameter d2 of the spacer protrusion 4.

[0052] The gasket 8 is pre-assembled on the helical rod 2 and located in the spacer region 7 between the spacer protrusion 4 and the threaded portion 5. The gasket 8 has an inner diameter D2, which is smaller than the diameter d2 of the spacer protrusion 4 and smaller than the outer diameter d of the threaded portion 5. Thus, the gasket 8 is held securely in the spacer region 7 and can be moved within the spacer region, thereby enabling advantageous coating.

[0053] The gasket 8 has a gasket height H and optionally includes a gasket chamfer 12 with a chamfer diameter Df, which facilitates the movement of the gasket 8 over the spacer protrusion 4. The chamfer diameter Df of the chamfer 12 is greater than the diameter d2 of the spacer protrusion 4 and greater than the inner diameter D2 of the gasket. In this way, the chamfer 12 advantageously guides and simplifies the clamping of the gasket over the spacer protrusion.

[0054] Here, the gasket 8 preferably has an outer diameter Ds larger than the outer diameter of the screw head 3, so as to advantageously seal the voids in the workpiece and provide a wider and more controlled support for the screw head at the pre-tightened workpiece 13.

[0055] Section 6 has a height h1, which is greater than the height H of the gasket, thereby ensuring that the gasket 8 can move freely during assembly and can be guided against the head 3 of the auger. The height h1 of section 6 is at least as large as the height h2 of the spacer region 7. The threaded portion 5 is located on the side of the spacer protrusion 4 away from the head 3 of the auger and has an outer diameter d, which is greater than the inner diameter D2 of the gasket. This prevents the gasket 8 from slipping and allows for uniform coating along the threaded portion. As an additional option, the threaded portion 5 has a pre-rolling diameter d3 along the shank 2, which is smaller than the diameter d2 of the spacer protrusion 4, so that the gasket 8 can be pushed to the spacer protrusion before thread rolling.

[0056] The figure shows the geometry and dimensions of the different components of the helical element 1, including the position and dimensions of the gasket 8 relative to the helical rod 2, the spacer protrusion 4, the helical head 3, and the threaded portion 5.

[0057] Figure 2 and Figure 3 The assembly configurations of the spiral element 1 are shown below. Figure 2 The diagram shows the helical element 1 in its first position, with the washer 8 spaced apart from the helical head 3. In this assembly, it is advantageous to apply additional coatings or paint. The spacer protrusion 4 is spaced apart from the helical head 3 and has a diameter d2 larger than the inner diameter D2 of the washer 8, thereby preventing the washer 8 from disengaging and holding it securely in the spacer region 7. The helical shank 2 extends through the pre-tightened workpiece 13 and workpiece 14, where the threaded portion 5 engages with the internal thread 15. Here, the section 6 and the spacer protrusion 4 are positioned entirely above the pre-tightened workpiece 13. The washer 8 can thus abut against the underside of the spacer protrusion 4, where advantageous resistance is obtained during tightening, ensuring that tightening in this position can only be achieved with a higher tightening torque. In this way, this position can be advantageously predetermined by the spacing between the spacer protrusion 4 and the helical head 3, or by the height h1 of the section 7.

[0058] exist Figure 3 The diagram shows the helical element 1 in the second position, where the gasket 8 has been pushed or clamped over the spacer protrusion 4 and abuts against the gasket abutment surface toward the helical head 3. This is achieved by tightening the helical element 1 during assembly. The spacer region 7 has a spacer region height h2, which is greater than the gasket height H in the axial direction. In this assembly position, the gasket 8 is pressed toward the helical head at the upper end of section 6 by the pre-tightened workpiece 13. The pre-tightened workpiece is thus clamped toward or connected to the workpiece 14 by the helical element 1.

[0059] Figure 4 A first embodiment of a gasket 8 is shown, the gasket having an inner diameter D2 and an outer diameter Ds. The gasket has a gasket chamfer 12 extending in a circumferential direction within a region inside the gasket, the gasket chamfer having a chamfer diameter df.

[0060] The gasket 8 therefore tapers towards the spacer protrusion 4 in the axial direction, making assembly easier. The spiral head 3 preferably has a corresponding head abutment chamfer 11.

[0061] Figure 5A second embodiment of the gasket 8 is shown. This gasket 8 also has an inner diameter D2, wherein the inner diameter has a height H1 in the axial direction. The gasket 8 then has an additional, larger second gasket inner diameter D3, which causes the gasket 8 to taper upwards. Furthermore, the gasket 8 has a gasket chamfer 12 at its upper end, which has a chamfer diameter df. The second gasket inner diameter D3 is larger than the inner diameter D2, making it easy to assemble the gasket 8. In this embodiment, preferably, the height H1 of the gasket inner diameter in the axial direction is half, preferably one-third, preferably one-quarter, or less than the gasket height H, making assembly particularly easy.

[0062] Figure 6 A detailed view of a third embodiment of the gasket 8 is shown, the gasket having a plurality of gasket protrusions 17 configured as protrusions. The inner diameter of the gasket 8 is indicated by D3, while the outer diameter of the protrusions 17 is indicated by D2. As an alternative, an optional gasket chamfer 12 with a gasket chamfer diameter df is configured on the upper side of the gasket 8. These protrusions 17 are arranged such that they enable outward material extrusion. Here, the protrusions 17 are small protrusions, such as corrugations or tufts, which can be easily passed over and protrude beyond the inner diameter of the gasket when tightening the screw element 1. In this way, guided and easy sliding along the screw rod 2 can be achieved. In addition, additional protection is provided to prevent the gasket 8 from unintentionally passing over the spacer protrusions 4 during coating.

[0063] Figure 7 It shows according to Figure 6 A side view of a third embodiment of the gasket 8, wherein the gasket has a protrusion 17 (not in...) Figure 7 (Drawn in the middle). Protrusions, such as region F, are... Figure 6 The design is as detailed in the diagram. The pre-assembled gasket 8 can be placed on the threaded portion 5 with a protrusion 17 at the lower side of the screw rod 2 and abut against the spacer protrusion in the area of ​​the gasket chamfer 12 on the upper side.

[0064] Figure 8A schematic diagram of a gasket 8 is shown, which has a particular embodiment of a protrusion 17 arranged along an inner chamfer 18 recessed relative to the inner diameter D2 of the gasket. The protrusion 17 has an inner envelope circle diameter smaller than the diameter of the spacer protrusion 4, thereby holding the gasket 8 in a pre-assembled state relative to the head of the screw with a defined minimum gap, and preventing it from sliding back over the spacer protrusion after clamping. A gasket 19 has an inner tapering portion in the form of an inner chamfer 18, on which the protrusions 17 are uniformly arranged circumferentially. Here, these protrusions 17 each have an upper protrusion side and enable the gasket 8 to be pushed over the spacer protrusion 4 with minimal force consumption, while the gasket is reliably held in position.

[0065] Alternatively, the gasket protrusion 17 can be configured as corrugated, either substantially along the periphery or substantially along the axial direction. The corrugated shape makes assembly easier and prevents tilting.

[0066] The gasket 8 shown in the figure is designed such that it is held at a defined interval relative to the auger head 3 during the coating process to prevent the gasket 8 from sticking to the auger head 3 and the auger rod 2. This ensures that technical properties such as the coefficient of friction, conductivity, and corrosion resistance remain unchanged.

[0067] List of reference numerals in the attached diagram: 1. Helical element, helical component 2. Spiral rod section 3. Head of the spiral component 4. Spacing protrusions, spacing geometry 5. Threaded section 6 sections, coated sections 7. Interval area 8 gaskets 9. Spiral axis, central axis 10. Drive mechanism, tightening contour 11. Head rests against the chamfer. 12. Chamfering of gaskets 13 Pre-tightening workpieces and components 14. Workpieces, components 15 Internal Thread 16. Inner side of the gasket 17. Protrusions, gasket protrusions, corrugations 18. Chamfer inside the protruding part 19. Upper side of the protrusion h1 Height (Section) h2 is the height of the interval region. d Outer diameter, thread outer diameter d2 is the diameter of the septum protrusion. d3 refers to the diameter of the gap area, the diameter of the gap area, and the pre-rolling diameter. d4 is the diameter of the coated section. H represents the gasket height and thickness. H1 Height of the inner diameter of the gasket Ds gasket outer diameter D2 is the inner diameter of the gasket. D3 Inner diameter of the second gasket, diameter of the tapered section Df Chamfer Diameter

Claims

1. A helical element (1), which has at least: i) A screw rod (2) having a screw head (3). ii) A spacer protrusion (4) at the stalk portion (2) of the auger, spaced apart from the head of the auger, the spacer protrusion having a diameter (d2) and iii) The threaded portion (5) at the side of the spacer protrusion (4) away from the head (3) of the helical member, the threaded portion having an outer diameter (d), and iv) A gasket (8) pre-assembled on the auger rod (2) and arranged between the spacer protrusion (4) and the threaded portion (5), the gasket having an inner diameter (D2). in, The inner diameter (D2) of the gasket (8) is smaller than the diameter (d2) of the spacer protrusion (4) and smaller than the outer diameter (d) of the threaded portion (5), such that the gasket (8) is arranged in the spacer region (7) at a certain interval between the spacer protrusion (4) and the threaded portion (5) along the auger rod (2) relative to the auger head (3) to prevent detachment.

2. According to claim 1, the helical element (1) is tightened during assembly so that the gasket (8) can move over the spacer protrusion (4) and abut against the gasket abutment surface of the helical head (3).

3. The helical element (1) according to at least one of the preceding claims, wherein, A section (6) with a predetermined interval is constructed along the shank (2) between the gasket abutment surface of the auger head (3) and the spacer protrusion (4). The section has a height (h1), wherein the section (6) is greater than the gasket height (H) of the gasket (8) in the axial direction.

4. The helical element (1) according to at least one of the preceding claims, wherein, The height (h2) of the interval region (7) is greater than the height (H) of the gasket in the axial direction, preferably at least 1.2 times, more preferably at least 1.5 times, so that the gasket (8) can be maintained in the interval region in a manner that allows it to move freely along the helical rod (2).

5. The helical element (1) according to at least one of the preceding claims, wherein, The height (h1) is at least as large as the height (h2) of the interval region.

6. The helical element (1) according to at least one of the preceding claims, wherein, The diameter (d3) of the interval region (7) is the same as the diameter (d4) of the segment (6).

7. The helical element (1) according to at least one of the preceding claims, wherein, The gasket (8) is tapered on its inner side (16) toward the spacer protrusion (5).

8. The helical element (1) according to at least one of the preceding claims, wherein, The gasket (8) has at least two, preferably three or more, protruding gasket protrusions (17) on the side facing the threaded portion (5) along the inner diameter of the gasket, wherein the inner envelope circle diameter of at least two gasket protrusions (17) is smaller than the diameter (d2) of the spacer protrusion (4).

9. The helical element (1) according to at least one of the preceding claims, wherein, The spacer protrusions (4) are constructed continuously along the periphery over the entire diameter (d2).

10. The helical element (1) according to at least one of the preceding claims, wherein, The spiral element (1) is preferably coated entirely.

11. A method for manufacturing a helical element, particularly a helical element (1) according to at least one of claims 1-10, the helical element having a pre-assembled gasket (8), the method comprising at least the following steps, particularly in the following order: a) Provide a spiral member having a spiral head (3) and a spiral rod (2), b) A spaced protrusion (4) with a diameter (d2) is generated at the stalk portion (1) of the helical member. c) Apply a washer (8) having an inner diameter (D2) to the screw rod (2). d) A threaded portion (5) with an outer diameter (d) is produced, particularly at the shank portion (2), on the side of the spacer protrusion (4) away from the head (3) of the auger, by rolling. in, The inner diameter (D2) of the helix of the gasket (8) is smaller than the diameter (d2) of the spacer protrusion (4) and smaller than the outer diameter (d) of the threaded portion (5), so that the gasket (8) is held in the spacer region (7) in a non-detachable manner between the spacer protrusion (4) and the threaded portion (5).

12. The method according to claim 11, wherein, The method has additional steps: e) Coating the spiral element (1) with pre-assembled gaskets (8), wherein the gaskets (8) are arranged at intervals in the interval region (7) relative to the spiral head (3).

13. The method according to at least claim 11 or 12, wherein, The generation of the spacer protrusion (4) in step b) is achieved by deformation, preferably by pressing or rolling, or by cutting.

14. The method according to at least one of claims 11 to 13, wherein, The diameter (d2) of the spacer protrusion (4) is greater than the pre-rolling diameter (d3) of the helical element (1) before the threaded portion (5) is generated in step d), so that the gasket (8) can be pushed onto the helical rod portion (2) in step c).

15. A method for coating a spiral element, the method comprising at least the following steps: A) Provide a helical element (1) according to at least one of claims 1-9. B) Coating the spiral element (1), preferably by roller coating. in, During the coating process in step B), the pre-assembled gasket (8) is held in the spaced area (7) by the spacer protrusion (4) in a manner spaced apart from the spiral head (3).

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