Application system component comprising a thread for connection to a thread of an application system device

Abstract

NOT VISIBLE DUE TO STATUS OF PATENT

Description

[0001] DESCRIPTION

[0002] Application system component with a thread for connection to a thread of an application system device

[0003] The invention relates to an application system component (preferably a bell cup or a drive shaft therefor) with a thread for (preferably self-locking) connection to a thread of an application system device (preferably a bell cup or a drive shaft therefor). The invention also relates to a device combination comprising an application system component and an application system device, and thus preferably a bell cup-drive shaft combination.

[0004] Rotary atomizers (e.g., atomizer turbines or generally fast-rotating small rotors) for paint applications are typically operated over a wide speed and load range (e.g., between approximately 8,000 and 80,000 rpm), with the paint medium usually being applied via a bell cup. The bell cup is centered and attached to the rotor (drive shaft) of an atomizer turbine. The centering must be precisely aligned in terms of position and location to minimize the additional imbalance of the bell cup on the entire rotor system. Furthermore, the bell cup must be easy to replace by an operator when the system is at a standstill. The bell cup is often attached to the rotor using a thread. The assembly and disassembly of the bell cup is usually carried out using a tool. The tool typically grips the bell cup and applies a torque to the rotor system.The torque corresponds to the design of a threaded screw connection. The rotor must be held in place with a rotor lock. The fastening between the bell cup and rotor must not come loose or rotate relative to the rotor, for example, in the event of abrupt speed and load changes. However, the changing speed ranges of the atomizer turbine create a loosening or tightening torque on the threaded connection with each speed change. This can significantly reduce the tightening torque and lead to loosening of the threaded connection. Furthermore, the rotation creates increased oscillation forces (e.g., vibrations). This can also lead to loosening of the threaded connection over an extended operating time of the atomizer turbine.EP 1674 161 A2 therefore discloses an additional centrifugal force safety device to prevent the bell cup from being thrown off. The centrifugal force safety device creates a positive connection with the rotor of the atomizer turbine during operation. This type of additional safety device for the bell cup is complex in terms of manufacturing, critical in terms of balancing, and expensive. Another problem is that in paint shops, the threads are often contaminated with paint and / or other fluids commonly used in paint shops (e.g., detergents, solvents, etc.), which can lead to the threads sticking together, with the result that the threads can no longer be easily removed or can no longer be removed without causing damage.

[0005] One object of the invention is to provide an improved and / or alternative connection by means of which an application system component can be coupled, in particular detachably, to an application system device. The connection should preferably be resistant to adhesion, resistant to detachment, be structurally uncomplicated, and / or be uncritical in terms of balancing.

[0006] This object can be achieved in particular with the features of the independent claim. Advantageous further developments are disclosed in the subclaims or emerge from the following description of preferred embodiments of the invention.

[0007] The invention relates to an application system component with a thread for (preferably self-locking) connection to a thread of an application system device. The preferably self-locking connection can be created in particular by a linear contact.

[0008] The thread of the application system component can have a total flank angle formed by a first flank inner angle and a second flank inner angle.

[0009] The application system component is characterized in particular in that the first flank inner angle is greater than 36° and / or less than 86°, preferably for generating a line contact with the thread of the application system device.

[0010] The line contact can preferably be generated by a thread flank of the application system component having the first flank internal angle and / or, for example, a crown and / or cone clamping surface of the thread of the application system device.

[0011] The advantageously created line contact can, for example, form a cutting edge. Any thread contamination that may have developed can be cut away at the cutting edge and / or by the cutting edge, which can advantageously protect against sticking, for example. This can ensure, in particular, safe assembly and disassembly.

[0012] Alternatively or additionally, the advantageously increased flank clearance achieved by the line contact (suitably between a thread flank of the thread of the application system component and a thread flank of the thread of the application system device) allows the threaded connection to absorb, for example, more thread contamination between the thread flanks. This allows, for example, thread contamination to remain more readily in the free space between the thread flanks and is less likely, or at least less likely, to contaminate the line contact and / or reach a crown and / or conical clamping surface of the thread of the application system device.

[0013] The linear contact forms the (particularly central) contact surface of the threaded connection and must be kept clean at all times. This can be advantageously achieved by using linear contact with clearance for dirt collection. This advantageously ensures, for example, less misalignment of the application system component and / or the application system device and thus leads, for example, to less imbalance, e.g., of the rotor system, which advantageously leads to increased operational reliability.

[0014] The application system component can be, for example, a bell cup for applying an application agent or a drive shaft (e.g. turbine shaft) for mounting and / or rotating a bell cup for applying an application agent.

[0015] The application system device can be, for example, a bell cup for applying an application agent or a drive shaft (e.g. turbine shaft) for mounting and / or rotating a bell cup for applying an application agent.

[0016] The drive shaft is preferably a (e.g. hollow) turbine shaft and / or a hollow drive shaft, in particular for carrying an application agent.

[0017] The invention thus preferably relates to a threaded connection (preferably an interface) for the, in particular self-locking, connection of a bell cup and a bell cup drive shaft. The application medium is preferably paint. However, the application medium can alternatively also be an adhesive, a sealing material, or an insulating material.

[0018] The application agent may preferably be a coating agent.

[0019] The first flank internal angle of the thread of the application system component can, for example, be greater than 46° and / or less than 76°, preferably greater than 56° and / or less than 66°, in particular greater than 59° and / or less than 63°.

[0020] The second internal flank angle of the thread of the application system component can, for example, be smaller than the first internal flank angle of the application system component.

[0021] The second flank internal angle of the thread of the application system component can, for example, be greater than 0° and / or less than 45°, preferably greater than 4° and / or less than 34°, preferably greater than 14° and / or less than 24°, in particular greater than 17° and / or less than 21°.

[0022] The linear contact preferably serves to create a self-locking threaded connection (particularly when the threads are screwed together). Alternatively or additionally, the linear contact can serve, for example, to create (particularly when the threads are screwed together and / or when screwing the threads together) an elastic thread deformation, a plastic thread deformation, or a thread deformation in the transition and / or boundary region between plastic and elastic deformation, in particular to create a self-locking threaded connection. The thread deformation can expediently be created in the thread of the application system component and / or in the thread of the application system device.

[0023] A line load can therefore preferably be selected such that (particularly in the screwed state of the threads) an elastic thread deformation, a plastic thread deformation, or a thread deformation in the transition and / or boundary region between plastic and elastic deformation is generated, which can advantageously ensure, for example, optimal self-locking of the threaded connection. The screwed state of the threads refers in particular to a screwed state, expediently, of the thread of the application system component and the thread of the application system device.

[0024] The screwed state is preferably a safe screwed state.

[0025] Preferably, the line contact can be generated by a thread flank of the thread of the application system component and / or a, preferably curved, crown and / or conical clamping surface of the thread of the application system device.

[0026] The thread flank of the thread of the application system component can, for example, be inclined, be planar and / or have the first flank internal angle.

[0027] It is possible that, particularly when the threads are screwed together, a free space can be expediently created on both sides next to the line contact, e.g. to absorb thread contamination, and / or the line contact serves to create a cutting edge, in particular for cutting free and / or removing thread contamination (e.g. paint, detergent and / or solvent, etc.).

[0028] The thread of the application system component can expediently have an outer diameter, an inner diameter, and / or a pitch diameter. Alternatively or additionally, the application system device can, for example, have an outer diameter, an inner diameter, and / or a pitch diameter.

[0029] It is possible for the line contact to be created in a thread area of ​​the application system component's thread, whereby the thread area is defined by the pitch diameter of the application system component's thread plus / minus a maximum of 0.1 mm, plus / minus a maximum of 0.05 mm or plus / minus a maximum of 0.025 mm. This makes it possible, for example, for the line contact, particularly when the thread is screwed together, to be created with a deviation of plus / minus a maximum of 0.1 mm, plus / minus a maximum of 0.05 mm or plus / minus a maximum of 0.025 mm in the geometric center between the outer diameter and inner diameter of the application system component's thread. Alternatively or additionally, the line contact can, for example,be capable of being produced in a threaded area of ​​the thread of the application system device, wherein the threaded area is defined by the outer diameter of the thread of the application system device minus a maximum of 0.1 mm, minus a maximum of 0.05 mm or minus a maximum of 0.025 mm.

[0030] It is possible that the line contact, especially in the screwed state of the threads, has a width of less than 0.075mm, less than 0.05mm or less than 0.025mm.

[0031] The thread of the application system component can, for example, define a thread pitch that, in cross-section, has at least substantially the shape of a triangle, in particular a triangle with unequal sides, preferably with rounded edges. Alternatively or additionally, the thread of the application system device can, for example, define a thread pitch that, in cross-section, has at least substantially the shape of a trapezoid, in particular a trapezoid with unequal sides, preferably with rounded edges.

[0032] The total flank angle of the thread of the application system component can, for example, be greater than or equal to 60° and / or less than or equal to 100°, preferably greater than or equal to 70° and / or less than or equal to 90°, preferably greater than or equal to 75° and / or less than or equal to 85°.

[0033] The thread of the application system device may have a total flank angle formed by a first flank inner angle and a second flank inner angle.

[0034] The total flank angle of the thread of the application system device can, for example, be greater than or equal to 30° and / or less than or equal to 60°, preferably greater than or equal to 45° and / or less than or equal to 55°.

[0035] The first flank inner angle of the thread of the application system device can, for example, be greater than 0° and / or less than 45°, preferably greater than 4° and / or less than 34°, in particular greater than 14° and / or less than 24°, in particular greater than 17° and / or less than 21°. Alternatively or additionally, the second flank inner angle of the thread of the application system device can, for example, be greater than 4° and / or less than 54°, preferably greater than 14° and / or less than 44°, preferably greater than 24° and / or less than 34°, in particular greater than 27° and / or less than 31°. The second flank inner angle of the thread of the application system component and the first flank inner angle of the thread of the application system device can, for example, be aligned parallel to one another, preferably plane-parallel.Alternatively or additionally, the second flank inner angle of the thread of the application system component can be substantially the same size as the first flank inner angle of the thread of the application system device.

[0036] In a preferred embodiment, at least one of the following features is possible: the ratio (dal / db3) of the outer diameter (dal) of the thread of the application system component to the inner diameter (db3) of the thread of the application system device is in the range 1.001 to 1.1, preferably in the range 1.025 to 1.076, and / or the ratio (dbl / db2) of the outer diameter (dbl) of the thread of the application system device to the pitch diameter (db2) of the thread of the application system device is in the range 1.001 to 1.11, preferably in the range 1.03 to 1.081, and / or the ratio (da2 / db3) of the pitch diameter (da2) of the thread of the application system component to the inner diameter (db3) of the thread of the application system device is in the range 1.001 to 1.09, preferably in the range 1.02 to 1.071,and / or the ratio (da2 / db2) of the pitch diameter (da2) of the thread of the application system component to the pitch diameter (db2) of the thread of the application system device is in the range 0.9 to 1.1, preferably in the range 0.95 to 1.05, and / or the ratio of the outer diameter of the thread of the application system device to the pitch of the thread of the application system device is in the range 30 to 10, preferably in the range 25 to 15, in particular in the range 17 to 22.,

[0037] It should be noted that the pitch diameter (preferably of the thread of the application system component and / or the thread of the application system device) corresponds to the geometric mean of the outer diameter and the inner diameter (preferably of the thread of the application system component and / or the thread of the application system device). The pitch diameter (preferably of the thread of the application system component and / or the thread of the application system device) is preferably calculated, for example, as follows: (outer diameter + inner diameter) / 2.

[0038] As usual, the pitch refers to the distance between two threads.

[0039] For example, in a multi-start thread, the corresponding thread pair is usually referred to as the pitch. In a multi-start thread, each thread typically has a separate thread start, so that several threads run parallel to each other.

[0040] The thread of the application system component and / or the thread of the application system device can, for example, have a pitch in the range of 0.4 mm to 1.2 mm, preferably in the range of 0.6 mm to 1.0 mm, in particular in the range of 0.7 mm to 0.9 mm (particularly in the case of a single-start variant). Alternatively or additionally, the thread of the application system component and / or the thread of the application system device can, for example, have a pitch in the range of 0.8 mm to 2.4 mm, preferably in the range of 1.2 mm to 2.0 mm, in particular in the range of 1.4 mm to 1.8 mm (particularly in the case of a double-start variant).

[0041] The thread of the application system component and / or the thread of the application system device can, for example, be single-start or multi-start, in particular double-start or more than double-start.

[0042] The thread of the application system component can be an external thread or an internal thread, whereby alternatively or additionally the thread of the application system device can be an external thread or an internal thread.

[0043] The application system component (in particular its thread) and / or the application system device (in particular its thread) is preferably configured to be flowed through by application agent.

[0044] It should be mentioned that the first flank inner angle and / or the second flank inner angle of the thread of the application system component and / or the first flank inner angle and / or the second flank inner angle of the thread of the application system device are expediently measured in particular relative to a reference straight line or reference plane that is aligned orthogonally to the thread rotation axis (e.g. thread center axis), in particular of the thread of the application system component and / or the thread of the application system device. The reference straight line or the reference plane preferably extends to the associated thread tooth (e.g. to the associated thread tooth tip), in particular of the thread of the application system component and / or the thread of the application system device. The thread of the application system component can, for example, be made of metal (e.g. stainless steel) or plastic, or of a combination of metal and plastic.

[0045] The thread of the application device can be made of metal (e.g. stainless steel) or plastic, or a combination of metal and plastic.

[0046] The invention relates not only to an application system component as disclosed herein, which is suitably suited for connection to an application system device, but also to an application system component with an application system device, which can be designed, for example, as disclosed herein, and thus preferably to an application system component-application system device combination.

[0047] Alternatively or additionally, the invention relates to the application system component that is expediently connected to the application system device, e.g., in a screwed state.

[0048] As already mentioned, the application system component can be, for example, a bell cup for applying an application agent or a drive shaft for mounting and rotating a bell cup for applying an application agent, wherein alternatively or additionally the application system device can be, for example, a bell cup for applying an application agent or a drive shaft for mounting and rotating a bell cup for applying an application agent.

[0049] The invention also relates in particular to a device combination (e.g., a rotary atomizer) comprising an application system component as disclosed herein and an application system device, e.g., as disclosed herein.

[0050] The application system component can, for example, be designed as a bell cup and the application system device can, for example, be designed as a drive shaft for the bell cup or vice versa, so that, for example,

[0051] B. the application system device can preferably be designed as a bell cup and the application system component as a drive shaft for the bell cup.

[0052] The loosening direction of the thread is preferably directed counter to the direction of rotation of the drive shaft. It should be noted that the application system component and / or the application system device can be, for example, a valve (e.g., for controlling the application of an application agent (e.g., paint)) or a valve interface (e.g., of a color changer, a rotary atomizer, or a print head for the preferably essentially overspray-free application of an application agent (e.g., paint)) for coupling a valve.

[0053] The invention also relates to a use of an application system component as disclosed herein and / or an application system device as disclosed herein or a device combination as disclosed herein for applying an application agent (e.g. paint) to a motor vehicle body and / or an attachment therefor.

[0054] The invention also includes, in particular, a rotary atomizer comprising a bell cup and a drive shaft for mounting and / or rotating the bell cup.

[0055] The line contact in combination with the special design of the thread of the application system component and / or the special design of the thread of the application system device preferably enables at least one of the following advantages and / or at least one of the following features:

[0056] The line contact creates a particularly high self-locking force to reduce the loosening of the threaded connection, whereby preferably the resulting line load causes an elastic deformation, a plastic deformation or a thread deformation in the transition and / or boundary area between plastic and elastic deformation,

[0057] Due to the elasticity and / or flexibility of the thread of the application system component and / or the thread of the application system device, more threads carry the force,

[0058] Mechanical stress reduction,

[0059] Stresses in the notch stress-sensitive areas, such as the radii, are significantly reduced,

[0060] Optional multi-start thread of the application system component and / or the application system device leads to more stroke per revolution,

[0061] Optional multi-start thread of the application system component and / or the application system device distributes the force over more threads, thus lower tightening torque. By changing the direction of rotation, the loosening torque only needs to be protected against turbine and / or drive shaft acceleration and not against turbine and / or drive shaft blockage.

[0062] For example, in an air turbine driving the drive shaft, the acceleration is always greater than the deceleration in normal operation,

[0063] Bonding security, especially no sticking due to paint contamination,

[0064] For reasons of usability and habit, a left-hand thread is omitted, Less damage to the threaded connection, Increased self-locking of the threaded connection, Possible omission of an additional release protection,

[0065] Cost savings due to the possible elimination of additional drop protection,

[0066] Less vibration due to the possible elimination of an additional safety device, Longer service life due to the elimination of an additional safety device, Higher balancing quality, More efficient assembly, Less sensitive to contamination, and / or

[0067] Because the direction of rotation of the drive shaft is preferably opposite to the loosening direction of the thread, the thread can tighten during braking, thus ensuring additional protection against shedding (e.g. a bell cup shedding).

[0068] It should be noted that the specific design of the thread of the application system component and / or the specific design of the thread of the application system device was determined through extensive research, which revealed that even small changes can have significant negative or significant positive effects. By using the specific design of the thread of the application system component and / or the specific design of the thread of the application system device, a surprising and advantageous array of advantages can be achieved that previously seemed impossible with a threaded connection.

[0069] The previously described preferred embodiments and features of the invention can be advantageously combined with one another. Other advantageous developments of the invention are disclosed in the subclaims or emerge from the following description of preferred embodiments of the invention in conjunction with the accompanying figures. Figures 1 to 7 show schematic sectional views of a portion of an application system component and a portion of an application system device according to an embodiment of the invention.

[0070] Figure 8 shows a sectional view of a device combination, in particular a bell cup and a drive shaft, according to an embodiment of the invention, and

[0071] Figure 9 shows a rotary atomizer with a bell cup and a drive shaft according to an embodiment of the invention.

[0072] The preferred embodiments of the invention described with reference to the figures partially correspond, with similar or identical parts being provided with the same reference numerals. For explanations thereof, reference can also be made to the description of the other embodiments to avoid repetition. For illustrative purposes, not all parts are provided with reference numerals in all figures.

[0073] Figures 1 to 7 show schematic sectional views of a part of an application system component 10 and a part of an application system device 50 according to an embodiment of the invention, wherein the application system component 10 and the application system device 50 are described below with joint reference to Figures 1 to 7.

[0074] The application system component 10 can, for example, be a bell cup for applying an application agent or a drive shaft for mounting and rotating a bell cup for applying an application agent (e.g., Figures 8 and 9). The application system device 50 can, for example, be a bell cup for applying an application agent or a drive shaft for mounting and rotating a bell cup for applying an application agent (e.g., Figures 8 and 9).

[0075] B. Figures 8 and 9).

[0076] The application system component 10 comprises a thread 11 for connection, preferably by means of a self-locking line contact LC, to a thread 51 of the application system device 50. The thread 11 of the application system component 10 comprises a total flank angle ages, which is formed by a first flank inner angle a1 and a second flank inner angle a2, wherein the first flank inner angle a1 is greater than 36° and less than 86° to produce a line contact LC with the thread 51 of the application system device 50.

[0077] In the discussed embodiment, the first flank inner angle a1 is, for example, approximately 61°, the second flank inner angle a2 is, for example, approximately 19° and the total flank angle ages is, for example, approximately 80°.

[0078] Thread 11 can be an external thread or an internal thread. Thread 51 can be an external thread or an internal thread. In the discussed embodiment, thread 11 is an internal thread and thread 51 is an external thread, although it is also possible for thread 11 to be an external thread and thread 51 to be an internal thread.

[0079] The line contact LC serves in particular to create a self-locking threaded connection of the threads 11 and 51, wherein the self-locking threaded connection can be created, for example, by an elastic thread deformation, a plastic thread deformation or a thread deformation in the transition and / or boundary area between plastic and elastic deformation.

[0080] It is preferred that the line contact LC can be created by an inclined, preferably planar thread flank (clamping surface) of the thread 11 of the application system component 10 and a preferably curved, crown and / or conical clamping surface of the thread 51 of the application system device 50. It is also preferred that, in particular on both sides next to the line contact LC, a free space for receiving thread contamination can be created, and / or that the line contact LC serves to create a cutting edge, in particular for cutting free and / or removing thread contamination (e.g., paint, solvent, or detergent, etc.).

[0081] The line contact LC can be created in a thread area TI of the thread 11 of the application system component 10, wherein the thread area TI can be defined by the flank diameter da2 of the thread 11 of the application system component 10 plus / minus, for example, a maximum of 0.1 mm (e.g., Figures 3 and 5). The line contact LC can be created in a thread area T2 of the thread 51 of the application system device 50, wherein the thread area T2 can be defined by the outer diameter dbl of the thread 51 of the application system device 50 minus a maximum of 0.06 mm (e.g., Figures 4 and 6). Figure 7 shows the threads 11 and 51 in the screwed state. The line contact LC can, for example, have a width W of less than 0.075 mm.

[0082] The thread 51 of the application system device 50 comprises a total flank angle ßges, which is formed by a first flank inner angle ßl and a second flank inner angle ß2. The first flank inner angle ßl is preferably greater than 4° and less than 34°, with the second flank inner angle ß2 preferably being greater than 4° and less than 54°. In the discussed embodiment, the first flank inner angle ßl is, for example, approximately 19°, the second flank inner angle ß2 is, for example, approximately 29°, and the total flank angle ßges is, for example, approximately 48°.

[0083] It is preferred that the second flank inner angle a2 of the application system component 10 and the first flank inner angle ßl of the application system device 50 are aligned parallel, preferably plane-parallel, to one another, and the second flank inner angle a2 of the application system component 10 is substantially the same size as the first flank inner angle ßl of the application system device 50.

[0084] As can be seen, for example, in Figures 1 and 2, the angles a1, a2, ß1 and / or ß2 are measured in particular relative to a reference line or reference plane R which is orthogonally aligned to the schematically shown thread rotation axis RA (e.g. thread center axis) of the thread 11 and / or 51, and preferably extends to the associated thread tooth of the thread 11 and / or 51.

[0085] The thread 11 of the application system component 10 defines a thread 12 which, in cross-section, may have at least substantially the shape of a suitably unequal-sided triangle, preferably with rounded edges.

[0086] The thread 51 of the application system device 50 defines a thread 52 which, in cross section, may have at least substantially the shape of a suitably unequal-sided trapezoid, preferably with rounded edges.

[0087] Due to the special design of thread 11 in particular, stresses in the notch stress-sensitive areas, such as the radii, can advantageously be significantly reduced. However, due to the special design of thread 11 in particular, a line contact LC can be generated between threads 11 and 51. A resulting high line load preferably causes elastic thread deformation, plastic thread deformation or thread deformation in the transition and / or boundary area between plastic and elastic deformation, expediently of thread 11 and / or thread 51. This can advantageously generate self-locking and / or increase the resistance to loosening of the threaded connection during rotation, which can, for example, lead to the elimination of an additional release protection device. The line load is preferably selected so that it lies on the boundary between elastic and plastic thread deformation.This ensures, for example, optimal self-locking of the threaded connection. Eliminating the need for an additional shedding protection device advantageously reduces vibrations on the rotor system, which, for example, leads to an increased service life of the entire system.

[0088] In extensive research, the following dimensions have proven to be particularly advantageous, in particular as being stick-proof, low-stress and / or resistant to loosening: the first flank inner angle a1 is, for example, greater than 36° and less than 86°, in particular greater than 46° and less than 76°, greater than 56° and less than 66° or greater than 59° and less than 63°, the second flank inner angle a2 is, for example, greater than 0° and less than 45°, in particular greater than 4° and less than 34° or greater than 14° and less than 24°, the first flank inner angle ßl is, for example, greater than 4° and less than 34°, in particular greater than 14° and less than 24°, the second flank inner angle ß2 is, for example, B. greater than 4° and less than 54°, in particular greater than 14° and less than 44° or greater than 24° and less than 34°,the ratio (dal / db3) of the outer diameter dal of the thread 11 of the application system component 10 to the inner diameter db3 of the thread 51 of the application system device 50 is in the range 1.001 to 1.1, preferably in the range 1.025 to 1.076, the ratio (dbl / db2) of the outer diameter dbl of the thread 51 of the application system device 50 to the pitch diameter db2 of the thread 51 of the application system device 50 is in the range 1.001 to 1.11, preferably in the range 1.03 to 1.081, the ratio (da2 / db3) of the pitch diameter da2 of the thread 11 of the application system component 10 to the inner diameter db3 of the thread 51 of the application system device 50 is in the range 1.001 to 1.09, preferably in the range 1.02 to 1.071, the ratio (da2 / db2) of the pitch diameter da2 of the thread 11 of the application system component 10 to the pitch diameter db2 of the thread 51 of the application system device 50 is in the range 0.9 to 1.1, preferably in the range 0.95 to 1.05,the ratio of the outer diameter dbl of the thread 51 of the application system device 50 to its pitch is in the range 30 to 10, preferably in the range 25 to 15, in particular in the range 17 to 22, and / or a pitch of the thread 11 and / or a pitch of the thread 51 is in the range 0.4 mm to 1.2 mm, preferably 0.6 mm to 1.0 mm, in particular 0.7 mm to 0.9 mm, or in the range 0.8 mm to 2.4 mm, preferably 1.2 mm to 2.0 mm, in particular 1.4 mm to 1.8 mm.

[0089] Figure 8 shows a sectional view of a bell cup and a drive shaft according to an embodiment of the invention. Figure 8 shows that the application system component 10 can be a bell cup and the application system device 50 can be a drive shaft for mounting and driving the bell cup, or vice versa, i.e., the application system device 50 can be the bell cup and the application system component 10 can be the drive shaft for mounting and driving the bell cup. The thread 11 can be an internal thread, while the thread 51 can be an external thread, or vice versa, i.e., the thread 11 can be an external thread and the thread 51 can be an internal thread.

[0090] Figure 9 shows a rotary atomizer with an application system component 10 and an application system device 50 according to an embodiment of the invention.

[0091] The application system component and / or the application system device can be, for example, a bell cup, a drive shaft, a valve or a valve interface.

[0092] The invention is not limited to the preferred embodiments described above. Rather, a multitude of variants and modifications are possible, which also utilize the inventive concept and therefore fall within the scope of protection. In particular, the invention also claims protection for the subject matter and features of the subclaims, independent of the respective claims referred to, and in particular even without the features of the main claim. The invention thus encompasses various aspects of the invention, which enjoy independent protection. List of reference symbols

[0093] 10 Application system component, preferably bell cup or drive shaft for bell cup

[0094] 11 Thread of the application system component, preferably external thread or internal thread a1 first flank internal angle of the thread of the application system component a2 second flank internal angle of the thread of the application system component ages total flank angle of the thread of the application system component dal outer diameter of the thread of the application system component da2 pitch diameter of the thread of the application system component da3 inner diameter of the thread of the application system component

[0095] TI thread area, in particular line contact thread area of ​​the thread of the application system component

[0096] 50 Application system device, preferably bell cup or drive shaft for bell cup

[0097] 51 Thread of the application system device, preferably external thread or internal thread ßl first flank internal angle of the thread of the application system device ß2 second flank internal angle of the thread of the application system device ßges total flank angle of the thread of the application system device dbl external diameter of the thread of the application system device db2 flank diameter of the thread of the application system device db3 internal diameter of the thread of the application system device

[0098] T2 Thread area, in particular line contact thread area of ​​the thread of the application device

[0099] LC line contact

[0100] W Width Line Contact

[0101] R Reference line or reference plane

[0102] RA Thread rotation axis, in particular of the thread of the application system component and / or the thread of the application system device

Claims

CLAIMS 1. Application system component (10), preferably a bell cup or drive shaft, wherein the application system component (10) comprises a thread (11) for the preferably self-locking connection to a thread (51) of an application system device (50), preferably a bell cup or drive shaft, wherein the thread (11) of the application system component (10) has a total flank angle (ages) which is formed by a first flank inner angle (al) and a second flank inner angle (a2), characterized in that the first flank inner angle (al) for generating a line contact (LC) with the thread (51) of the application system device (50) is greater than 36° and less than 86°.

2. Application system component (10) according to claim 1, wherein the first flank internal angle (α1) of the thread (11) of the application system component (10) is greater than 46° and / or less than 76°, preferably greater than 56° and / or less than 66°.

3. Application system component (10) according to one of the preceding claims, wherein the second flank inner angle (a2) of the thread (11) of the application system component (10) is smaller than the first flank inner angle (a1), and / or is greater than 0° and / or less than 45°, preferably greater than 4° and / or less than 34°, in particular greater than 14° and / or less than 24°.

4. Application system component (10) according to one of the preceding claims, wherein the line contact (LC) serves to create a self-locking threaded connection.

5. Application system component (10) according to one of the preceding claims, wherein the line contact (LC) serves to produce an elastic thread deformation, a plastic thread deformation or a thread deformation in the transition and / or boundary region between plastic and elastic deformation, preferably in order to produce a self-locking threaded connection.

6. Application system component (10) according to one of the preceding claims, wherein the line contact (LC) can be produced by means of an oblique, planar thread flank of the thread (11) of the application system component (10) and preferably a, in particular curved, crown and / or conical clamping surface of the thread (51) of the application system device (50).

7. Application system component (10) according to one of the preceding claims, wherein a free space for receiving thread contamination can be created on both sides next to the line contact (LC), and / or the line contact (LC) serves to create a cutting edge, in particular for cutting free and / or removing thread contamination.

8. Application system component (10) according to one of the preceding claims, wherein the line contact (LC) can be generated in a threaded region (TI) of the thread (11) of the application system component (10), wherein the threaded region (TI) is defined by the flank diameter (da2) of the thread (11) of the application system component (10) plus / minus a maximum of 0.1 mm, plus / minus a maximum of 0.05 mm or plus / minus a maximum of 0.025 mm, and / or in a threaded region (T2) of the thread (51) of the application system device (50), wherein the threaded region (T2) is defined by the outer diameter (dbl) of the thread (51) of the application system device (50) minus a maximum of 0.1 mm, minus a maximum of 0.05 mm or minus a maximum of 0.025 mm, and / or a width (W) of less than 0.075 mm, less than 0.05mm or less than 0.025mm.

9. Application system component (10) according to one of the preceding claims, wherein the thread (11) of the application system component (10) defines a thread (12) which, in cross-section, has the shape of a triangle, in particular an unequal-sided triangle, preferably with rounded edges, and / or the thread (51) of the application system device (50) defines a thread (52) which, in cross-section, has the shape of a trapezoid, in particular an unequal-sided trapezoid, preferably with rounded edges.

10. Application system component (10) according to one of the preceding claims, wherein the thread (51) of the application system device (50) has a total flank angle (ßges) which is formed by a first flank inner angle (ß1) and a second flank inner angle (ß2), wherein the total flank angle (ßges) of the thread (51) of the application system device (50) is greater than or equal to 30° and less than or equal to 60°, preferably greater than 45° and less than 55°, the first flank internal angle (ßl) of the thread (51) of the application device (50) is greater than 4° and / or less than 34°, preferably greater than 14° and / or less than 24°, and / or the second flank internal angle (ß2) of the thread (51) of the application system device (50) is greater than 4° and / or less than 54°, preferably greater than 14° and / or less than 44°, in particular greater than 24° and / or less than 34°.

11. Application system component (10) according to one of the preceding claims, wherein the second flank internal angle (a2) of the thread (11) of the application system component (10) and the first flank inner angle (ßl) of the thread (51) of the application system device (50) are aligned parallel, preferably plane-parallel, to each other, and / or the second flank inner angle (a2) of the thread (11) of the application system component (10) is essentially equal to the first internal flank angle (ßl) of the thread (51) of the application system device (50).

12. Application system component (10) according to one of the preceding claims, wherein the ratio of the outer diameter (dal) of the thread (11) of the application system component (10) to the inner diameter (db3) of the thread (51) of the application system device (50) is in the range 1.001 to 1.1, preferably in the range 1.025 to 1.076, and / or the ratio of the outer diameter (dbl) of the thread (51) of the application system device (50) to the flank diameter (db2) of the thread (51) of the application system device (50) is in the range 1.001 to 1.11, preferably in the range 1.03 to 1.

081.

13. Application system component (10) according to one of the preceding claims, wherein the ratio of the flank diameter (da2) of the thread (11) of the application system component (10) to the inner diameter (db3) of the thread (51) of the application system device (50) is in the range 1.001 to 1.09, preferably in the range 1.02 to 1.071, and / or the ratio of the flank diameter (da2) of the thread (11) of the application system component (10) to the flank diameter (db2) of the thread (51) of the application system device (50) is in the range 0.9 to 1.1, preferably in the range 0.95 to 1.

05.

14. Application system component (10) according to one of the preceding claims, wherein the ratio of the outer diameter (dbl) of the thread (51) of the application system device (50) to its pitch is in the range 30 to 10, preferably in the range 25 to 15, in particular in the range 17 to 22.

15. Application system component (10) according to one of the preceding claims, wherein the thread (11) of the application system component (10) and / or the thread (51) of the application system device (50) has a pitch in the range 0.4 mm to 1.2 mm, preferably 0.6 mm to 1.0 mm, in particular 0.7 mm to 0.9 mm, or 0.8 mm to 2.4 mm, preferably 1.2 mm to 2.0 mm, in particular 1.4 mm to 1.8 mm.

16. Application system component (10) according to one of the preceding claims, wherein the thread (11) of the application system component (10) and / or the thread (51) of the application system device (50) is single-start or multi-start 17. Application system component (10) according to one of the preceding claims, wherein the thread (11) of the application system component (10) is an external thread or an internal thread, and / or the thread (51) of the application system device (50) is an external thread or an internal thread.

18. Application system component (10) according to one of the preceding claims, with and / or connected to the application system device (50), and / or wherein the application system component (10) is a bell cup for applying an application agent or a drive shaft for mounting and rotating a bell cup for applying an application agent, and / or wherein the application system device (50) is a bell cup for applying an application agent or a drive shaft for mounting and rotating a bell cup for applying an application agent.

19. Application system component (10) according to one of the preceding claims, wherein the first flank inner angle (α1) and / or the second flank inner angle (α2) of the thread (11) of the application system component (10), and / or the first flank inner angle (β1) and / or the second flank inner angle (β2) of the thread (51) of the application system device (50) is measured relative to a reference straight line or reference plane (R) which is oriented orthogonally to the thread rotation axis (RA) and preferably extends to the associated thread tooth.

20. Device combination (10, 50) comprising an application system device (50) and an application system component (10) according to one of the preceding claims.

21. Device combination (10, 50) according to claim 20, wherein the application system component (10) is designed as a bell cup and the application system device (50) is designed as a drive shaft for the bell cup or vice versa, wherein the loosening direction of the thread (11) is directed opposite to the direction of rotation of the drive shaft.

22. Use of an application system component (10) according to one of claims 1 to 19 or a device combination (10, 50) according to claim 20 or 21 for applying an application agent to a motor vehicle body and / or an attachment therefor.