Tensioning system and method

Abstract

The invention relates to a clamping system (1) for an electric motor stator (100) to be treated with impregnating resin, comprising: a universal clamping mandrel (2) with a housing (3) extending along an axial direction (A) of the clamping system (1), with a control element (4) adjustable relative to the housing (3) along the axial direction (A), and with a number of adjusting elements (5) radially adjustable relative to the housing (3) by means of the control element (4), and a workpiece-specific clamping group (6) that can be mounted interchangeably on the clamping mandrel (2) with a number of clamping jaws (7) that can each be adjusted radially by means of one of the adjusting elements (5) for clamping the electric motor stator (100) to be treated, wherein the clamping group (6) is configured such that all components of the clamping group (2) can be replaced simultaneously during a clamping group change.

Description

FIELD OF APPLICATION AND STATE OF THE ART

[0001] The invention relates to a clamping system for an electric motor stator to be coated with impregnating resin. The invention also relates to a method for, in particular, the automatic, interchangeable mounting of a clamping group of such a clamping system on a clamping mandrel of said clamping system.

[0002] To electrically insulate and / or mechanically stabilize the windings of an electric motor stator, such electric motor stators are often coated with an impregnating resin. The preheated impregnating resin is typically dripped and / or applied to the winding of the electric motor stator. During the drip application of the impregnating resin to the winding, the electric motor stator is typically continuously rotated around its central axis so that the spaces between the individual windings of the electric motor stator are desirably completely filled with impregnating resin. It is possible to reduce the process time required for drip impregnation by heating the electric motor stator or its windings before, during, or after the impregnating resin application. This can improve the quality of the impregnation.Trickle impregnation is particularly suitable when only specific areas of the electric motor stator or its windings are to be wetted with the impregnating resin. Such selective wetting can be particularly advantageous when the windings are based on hairpin technology. In this case, secondary insulation of the windings may be indicated after the hairpins have been arranged and connected, particularly in the area of ​​a winding head of the electric motor stator. Such secondary insulation, especially when applied only to specific areas, can be produced particularly resource-efficiently through trickle impregnation.

[0003] Typically, an electric motor stator passes through various process stations during trickle impregnation. A first process station often heats the electric motor stator to be impregnated. A subsequent second process station is used to apply the impregnating resin by dripping impregnating resin onto the area of ​​the windings of the electric motor stator to be impregnated, particularly while rotating around its central axis. A third process station can gel the impregnating resin applied to the windings of the electric motor stator by dripping it onto the windings. A fourth process station can follow, which cures the impregnating resin on the electric motor stator or its windings, particularly with the addition of heat.At the end of the trickle impregnation process, the impregnated electric motor stator usually passes through a fifth process station, which serves to cool the impregnated electric motor stator, for example, to room temperature. The electric motor stator to be impregnated is usually transported through the process stations by means of a conveyor system. The conveyor system is usually equipped with at least one clamping mandrel with radially outwardly adjustable clamping jaws. The clamping mandrel is usually inserted axially into the electric motor stator to be trickled. The clamping jaws of the clamping mandrel are then usually adjusted radially outward to hold the electric motor stator to be trickled to the clamping mandrel, in particular in a force-fitting manner.The mandrel itself is typically rotatable relative to the conveyor device and / or to the process stations together with the clamped electric motor stator, in particular by means of a drive device of the conveyor device.

[0004] A clamping mandrel conventionally used for trickle impregnation is structurally matched to the electric motor stator to be clamped, particularly with regard to its inner diameter and / or axial length. Such conventional clamping mandrels can usually only clamp electric motor stators of similar or identical dimensions for trickle impregnation. If differently dimensioned electric motor stators are to be trickle impregnated using the same system, this typically requires a conversion process to replace the entire clamping mandrel depending on the respective dimension and / or one of the respective types of electric motor stator currently being trickled. However, such a conversion process is typically time-consuming and / or error-prone and / or cost-intensive.

[0005] Traditionally, a product and / or process change requires a large number of complete clamping fixtures or mandrels to cover the product and / or process variance. In addition, complete clamping fixtures and / or mandrels must be cleaned of contamination to be ready for use again after trickle impregnation. This can drive up product and process costs. TASK AND SOLUTION

[0006] It is therefore an object of the present invention to provide a novel clamping system for an electric motor stator to be coated with impregnating resin, as well as a novel method for interchangeably mounting a clamping group of such a clamping system on a mandrel of this clamping system, which proves to be particularly cost-effective, especially for small series. In particular, a clamping system is to be created that can be adapted particularly easily and / or flexibly, especially automatically, to differently dimensioned electric motor stators.

[0007] This problem is solved by the subject matter of the independent patent claims. Preferred embodiments are the subject matter of the dependent patent claims.

[0008] A clamping system according to the invention is provided for an electric motor stator to be drizzled with impregnating resin. In particular, the clamping system according to the invention is provided and / or configured for clamping an electric motor stator to be drizzled with impregnating resin. The clamped electric motor stator is, in particular, releasably fastened and / or fixed to the clamping system by frictional engagement. The clamped electric motor stator can be releasably fastened and / or fixed to the clamping system by frictional engagement only. In particular, an inner diameter of the electric motor stator is brought into contact with a clamping outer diameter of the clamping system in order to clamp the electric motor stator.

[0009] The clamping system according to the invention comprises a universal clamping mandrel. The universal clamping mandrel can be used, in particular at least largely, independently of the dimensions of the electric motor stator to be sprayed. In this respect, "universal" can refer to a dimension-related variety of electric motor stators that can be clamped using a uniform clamping mandrel of the clamping system. In particular, it is understood that "universal" in the present context does not mean "unlimitedly generally applicable." The universal clamping mandrel has a housing extending along an axial direction of the clamping system. In addition, the universal clamping mandrel has a control element that is guided so as to be adjustable relative to the housing along the axial direction. Furthermore, the universal clamping mandrel has a number of adjusting elements that can be radially adjusted relative to the housing by means of the control element.The number of adjusting elements is preferably three or more, in particular exactly three. In particular, the adjusting elements are radially adjustable relative to the housing in a star-like manner by means of the control element. The adjusting elements can be designed as pistons, bolts, and / or strips. The adjusting elements are, in particular, radially linearly displaceable. The adjusting elements can be guided on the housing, in particular each in a radial bore of the housing, for radial adjustment.

[0010] The clamping system according to the invention further comprises a clamping group that can be replaced and mounted on the universal clamping mandrel. The clamping group is designed to be workpiece-specific. The clamping group can therefore be structurally matched to the electric motor stator to be clamped, to be sprayed, and to form a workpiece, in particular its dimensions and / or type. The dimensions and / or type can relate to the inner diameter of the electric motor stator and / or the axial length of the electric motor stator. For a workpiece-specific design of the clamping group, the clamping diameter and / or clamping length can expediently be matched to the workpiece to be clamped, i.e. to the electric motor stator to be sprayed. The clamping group can be detachably fastened or attachable in the axial direction to the coaxially arranged clamping mandrel.In particular, changing the clamping group may require an axial movement of the clamping group relative to the clamping mandrel. The clamping group comprises a number of clamping jaws for clamping the electric motor stator to be sprayed. The clamping jaws can each be radially adjusted using one of the adjusting elements. As a result of the radial adjustment, the adjusting elements can be adjusted radially outward. The number of clamping jaws preferably corresponds to the number of adjusting elements. Preferably, the axial length of the clamping unit is smaller than the axial length of a laminated core of the electric motor stator to be clamped. In this way, contamination of the clamping unit can be kept to a minimum.

[0011] The clamping group of the clamping system according to the invention is configured such that all components of the clamping group can be replaced simultaneously during a clamping group change, in particular of the clamping system. In other words, all components of the clamping group are designed to be mounted on and / or removed from the clamping mandrel simultaneously during the clamping group change. This enables particularly rapid adaptation of the clamping system to differently dimensioned electric motor stators that are to be clamped.

[0012] In this context, "radial" refers to a radial direction of the clamping system that runs perpendicular to the axial direction. In this respect, "radial" can be understood as synonymous with "along the radial direction." A circumferential direction of the clamping system runs, in particular, perpendicular to the axial direction and perpendicular to the radial direction, in particular around a central axis of the clamping system that extends along the axial direction. The adjusting elements are preferably arranged along the circumferential direction, in particular equidistantly.

[0013] Advantageously, the clamping system according to the invention is particularly simple and / or flexible, in particular automatable, and adaptable, especially convertible, for clamping differently dimensioned electric motor stators. To adapt the clamping system to the dimensions of the electric motor stator currently to be clamped, only the clamping group needs to be replaced, whereas the universal clamping mandrel with the actuator system comprising the control element and the adjusting elements for clamping can remain on a conveyor device of a trickle impregnation system, in particular for a long time or even permanently. Clamping jaws with different radial heights and / or different axial lengths can be used to adapt the clamping group to the electric motor stator to be clamped.

[0014] The clamping system according to the invention can enable clamping of differently dimensioned electric motor stators, in particular with a laminated core outer diameter of, for example, 165 mm to 265 mm and / or with an inner diameter of, for example, 110 mm to 170 mm and / or with an axial laminated core length of, for example, 88 mm to 172 mm

[0015] The clamping system according to the invention can enable the coverage of a particularly high product and / or process variance. Such a high product and / or process variance can arise in particular from electric motor stators that have different dimensions, for example, with regard to a laminated core length and / or a laminated core diameter. Different process factors can be, for example, different impregnation resins, a process time, and / or a process temperature. The clamping system according to the invention can, in particular, enable the impregnation of electric motor stators with particularly high fluctuations. This can be particularly advantageous for small series.

[0016] The clamping system according to the invention enables a product change and / or clamping system cleaning to be carried out in a particularly short time, particularly automatically. Advantageously, the clamping system according to the invention also has a particularly small number of cost-effective components that can be replaced during product changes or clamping system cleaning.

[0017] The clamping system according to the invention has no additional axes and / or drives, in particular compared to conventional systems with conventional mandrels.

[0018] In an embodiment of the invention, the control element has a control section. The control section tapers in the axial direction of the clamping system. The control section has a control contour of the control element. In the area of ​​the control contour, the control section can be conical. In this case, the control section can form an infeed cone of the clamping mandrel or an expansion cone of the clamping mandrel. The adjusting elements each have a contact section that engages the control contour. The contact sections engage the control contour in such a way that adjusting the control element in the axial direction is accompanied by a coordinated adjustment of the adjusting elements radially outwards. Conversely, adjusting the control element counter to the axial direction can allow a, in particular coordinated, re-adjustment of the adjusting elements radially inwards.

[0019] In a further embodiment of the invention, each of the contact sections engages the control contour at a control contour section of the control contour that is assigned, in particular, exclusively to this contact section. Thus, for each contact section, the control contour can have exactly one control contour section assigned to this contact section. The contact sections and the control contour sections assigned to them are each coupled to one another in such a way that both an adjustment of the control element in the axial direction is accompanied by a coordinated adjustment of the actuating elements radially outward, and an adjustment of the control element counter to the axial direction is accompanied by a coordinated adjustment of the actuating elements radially inward.In particular, a respective contact section and the control contour section associated with this contact section are positively coupled to one another in such a way that both an adjustment of the control element in the axial direction is accompanied by a coordinated adjustment of the adjusting elements radially outwards, and an adjustment of the control element counter to the axial direction is accompanied by a coordinated adjustment of the adjusting elements radially inwards. In this way, a radial forced return of the adjusting elements can be realized. Such a forced return can, in particular, enable a clamping group change even if sticky impregnation resin has, in particular accidentally, entered the area of ​​a separation point between the clamping group and the clamping mandrel.

[0020] In a further embodiment of the invention, mutually associated control contour sections and contact sections have complementary coupling regions. The complementary coupling regions can be T-shaped and coordinated with one another. The coupling region of each of the control contour sections engages the coupling region of the contact section associated with this control contour section in a sliding manner at an angle to the axial direction.

[0021] It is expedient to form a positive connection between associated control contour sections and contact sections with respect to the circumferential direction of the clamping system and perpendicular on all sides to a guide direction of the respective control contour section, which runs obliquely to the axial direction. The coupling regions of the respective control contour section and the associated contact section can be slidably movable relative to one another, in particular only along the guide direction. The coupling region of the control contour section can be designed as a T-slot, and the coupling region of the contact section can be designed as a T-body section—or vice versa. "T-shaped," "T-slot," and / or "T-body section" can refer to a T-like cross-section with respect to the guide direction.It is understood that other shapes of complementary cross-sections of the control contour sections and the contact sections are also conceivable, for example dovetail-like cross-sections. In particular, the control contour sections and the contact sections are arranged in a star shape along the circumferential direction around the central axis of the clamping system. In a further embodiment of the invention, the clamping mandrel has an actuating element, in particular a plunger-like one, for adjusting the control element counter to the axial direction. The actuating element is guided so as to be adjustable relative to the housing along the axial direction. In particular, the actuating element projects into an interior space of the housing in order to contact the control element there. By adjusting the control element counter to the axial direction, a radially inward readjustment of the adjusting elements can be permitted and / or enabled, as already indicated above.Allowing the adjustment elements to be moved radially inward can be used to release the clamping system and release the previously clamped electric motor stator. The actuating element can be actuated axially from the outside.

[0022] In a further embodiment of the invention, the clamping mandrel has a guide device for axially movably guiding the actuating element for adjusting the control element counter to the axial direction. In particular, the guide device is designed as a hollow shaft, at least in some regions. The guide device adjoins the housing axially, in particular in the axial direction. The guide device can be connected axially to the housing using the same or different material. Axially facing away from the housing, the guide device for connecting the clamping mandrel can be coupled or can be coupled to a drive device, in particular an automatic drive device, of the clamping system for axially adjusting the clamping mandrel and / or for rotating the clamping mandrel about the central axis of the clamping system. The drive device can be part of a conveyor device of a system for trickle impregnation.

[0023] In this context, "uniform material" can be understood as synonymous with "one-piece" and / or "single-piece" and / or "integral." "Non-uniform material" can be understood as synonymous with "two-piece" and / or "two-piece."

[0024] In a further embodiment of the invention, the clamping mandrel has a resiliently deformable pretensioning device for generating a pretensioning force acting on the control element in the axial direction. The pretensioning force serves for the radial advancement of the clamping jaws, in particular automatically. The resiliently deformable pretensioning device can, for example, comprise a package of disc springs. The pretensioning force can be up to approximately 4.5 kN. The control element is axially adjustable relative to the housing counter to the pretensioning force, in particular in order to release the control element and / or a radial advancement of the clamping jaws. The clamping mandrel can have a support device, in particular one designed at least partially as a hollow shaft, for axially supporting the pretensioning device relative to the control element.The support device can be connected axially, in particular counter to the axial direction, to the housing, in particular with the same or different material.

[0025] The preload force generated by the preload device expediently forces the clamping jaws radially outward, in particular automatically. The preload force generated by the preload device can be transmitted to the adjusting elements in a wedge-gear-like manner through the interaction of the control contour with the contact sections of the adjusting elements. Advantageously, an electric motor stator clamped by the clamping system can be automatically held to the clamping jaws by means of the preload force that automatically moves the clamping jaws radially outward. This can be particularly advantageous from a fail-safe perspective. In particular, only the release of the adjustment of the adjusting elements and / or the clamping jaws requires control, in particular by means of the control element.

[0026] In a further embodiment of the invention, the control element has at least one projection protruding from the control section in the axial direction. The control element can have a number of such projections that protrude from the control section in the axial direction and that are arranged along the circumferential direction, in particular equidistantly. The number of projections can correspond to a number of adjusting elements. In particular, the at least one projection is arranged eccentrically. The actuating element of the clamping mandrel can be pressed against the projection counter to the axial direction in order to adjust the control element counter to the axial direction, in particular to release a feed of the clamping jaws.Alternatively or additionally, the actuating element of the clamping mandrel can have at least one projection protruding counter to the axial direction, in particular arranged eccentrically, wherein the projection of the actuating element can be pressed counter to the axial direction against the control element in order to adjust the control element counter to the axial direction, in particular in order to release a feed of the clamping jaws.

[0027] The projection can expediently be in positive engagement with the adjusting elements and / or the housing along the circumferential direction to provide anti-twist protection for the control element relative to the adjusting elements and / or the housing. The at least one projection can advantageously provide a comparatively large force transmission surface. A particularly large force transmission surface can be achieved if several projections, for example three projections, are provided.

[0028] In a further embodiment of the invention, when the clamping assembly is mounted on the mandrel, one of the adjusting elements and one of the clamping jaws are assigned to each other. Associated adjusting elements and clamping jaws are arranged directly or indirectly adjacent to each other, in particular connected to each other. In particular, the associated adjusting elements and clamping jaws do not touch when they are arranged indirectly adjacent to each other. In particular, the associated adjusting elements and clamping jaws touch when they are arranged directly adjacent to each other.

[0029] In a further embodiment of the invention, the clamping group has a, in particular substantially sleeve-shaped, base body. The clamping group also has a number of jaw supports that are radially adjustable relative to the base body. The jaw supports can be piston-shaped. The number of jaw supports can preferably correspond to the number of adjusting elements. The jaw supports serve to support one of the clamping jaws, in particular in an interchangeable or non-interchangeable manner. The jaw supports are each radially adjustable by means of one of the adjusting elements such that clamping jaws carried by the jaw supports can each be radially advanced by means of one of the adjusting elements. The clamping group with a sleeve-shaped base body, jaw supports, and clamping jaws is advantageously particularly compact.

[0030] The sleeve-shaped base body can expediently have through openings, in particular arranged in a star-like manner, for the radially movable guidance of one of the jaw carriers.

[0031] Preferably, the clamping jaws are formed separately from the jaw supports and are detachably or permanently connected to one of the jaw supports. If the clamping jaws are detachably connected to a respective one of the jaw supports, then the clamping jaws can be carried interchangeably by the respective jaw support. If the clamping jaws are non-detachably connected to the respective one of the jaw supports, then the clamping jaws can be carried non-replaceably by the respective jaw support. In alternative embodiments, the clamping jaws can be formed integrally on the respective jaw support that carries them non-replaceably. If the clamping jaws are carried non-replaceably by the associated jaw supports, it is conceivable to design the jaw supports, together with the permanently carried clamping jaws, to be interchangeable.

[0032] In a further embodiment of the invention, the jaw supports—when the clamping group is mounted on the mandrel—are each arranged radially between one of the adjusting elements and the clamping jaw carried by the respective jaw support. In this case, the clamping jaws can be arranged indirectly on the adjusting element assigned to them. In particular, the jaw supports are each arranged radially between one of the adjusting elements and the clamping jaw carried by the respective jaw support in order to connect one of the clamping jaws to one of the adjusting elements by means of one of the jaw supports. Mutually assigned adjusting elements, jaw supports, and clamping jaws can form a radial functional chain of the clamping system.

[0033] In a further embodiment of the invention, the mandrel, in particular its housing, has an axial stop against which the clamping group is axially supported when the clamping group is mounted on the mandrel. The axial stop is preferably circumferential and / or shoulder-shaped and / or collar-shaped. Such an axial stop can be expediently omitted if the positioning accuracy for changing the clamping group along the axial direction is sufficiently high. Conversely, the axial stop can advantageously reduce the positioning accuracy required for changing the clamping group.

[0034] In a further embodiment of the invention, the clamping system comprises a locking connection device for locking the housing of the clamping mandrel and the clamping group mounted thereon to one another. In particular, the locking connection device is designed for the automatic and / or releasable locking connection of the housing and the clamping group mounted thereon. The locking connection device can, for example, have a spring-loaded locking element and a locking contour complementary to the locking element, wherein the locking element can automatically lock into or onto the locking contour due to its spring-loaded mounting. The locking contour can be present on the clamping group or on the housing, and the elastically mounted locking element on the other component. For example, the spring-loaded locking element is radially adjustable in order to lock into or disengage from the locking contour.

[0035] In a further embodiment of the invention, the clamping system has a drive device, in particular an automatic one, for adjusting the clamping mandrel, i.e. in particular for moving the clamping mandrel. The drive device is controllable in order to adjust the clamping mandrel along the axial direction and transversely, in particular perpendicularly, to the axial direction and in order to rotate the clamping mandrel about the central axis of the clamping system. The drive device can be part of a conveyor device for transporting the clamping mandrel together with the clamping group and the electric motor stator to be impregnated through process stations for trickle impregnation. The clamping system has a storage device, in particular a stationary one. The storage device is designed for the storage, in particular automatic, of the replaced or to be replaced clamping group.In particular, the clamping mandrel is adjustable relative to the stationary storage device by means of the drive device, so that by adjusting the clamping mandrel relative to the storage device, the clamping group can be deposited on the storage device, or a clamping group deposited on the storage device can be picked up by the clamping mandrel. Such a clamping group change can occur, in particular, between two consecutive runs of the process stations with different electric motor stators. Expediently, every movement required to change the clamping group can be executed by the clamping mandrel, which is adjustable by means of the drive device.

[0036] In a further embodiment of the invention, the base body and the storage device have complementary alignment aids. By means of the complementary alignment aids, the base body of the clamping group can be aligned relative to the storage device, in particular radially and / or with respect to the circumferential direction. For example, one of the alignment aids can have an axially extending groove, and the other complementary alignment aid can have an engagement element for radially engaging the axial groove. In this way, the alignment of the base body relative to the storage device, in particular with respect to the circumferential direction, can be ensured particularly reliably.Alternatively or additionally, one of the alignment aids can be formed by an axially extending shaft section, and the other complementary alignment aid can be formed by an axially extending bore for receiving the shaft section, in order to achieve a desirable coaxial alignment of the base body and the storage device for changing the clamping group. The base body and the storage device also have complementary locking sections, in particular forming a bayonet lock of the clamping system, for releasably connecting the base body and the storage device.The locking sections may comprise engagement elements and complementary engagement contours that can be brought into engagement along the axial direction and can be locked together by rotating the base body relative to the storage device about the central axis of the clamping system after prior engagement along the axial direction in order to hold the base body and the storage device together along the axial direction.

[0037] The storage device expediently has a cover device, in particular one shaped like a circular disk. The cover device is spring-mounted for axial engagement with the base body, in particular axially, such that the locking section of the base body can be at least partially, in particular axially, covered by the cover device when the base body and the storage device are releasably connected. Thus, in a locked state of the storage device and the base body, the locking sections of the base body can be at least partially, in particular axially, covered by the storage device. Preferably, in the locked state, the locking sections of the base body are completely covered and / or shielded from the external environment of the clamping system by the storage device.

[0038] In a further embodiment of the invention, the storage device has a number of receiving devices. The receiving devices are each designed to receive a clamping jaw along the axial direction and to radially hold clamping jaws received in this way. In particular, the receiving devices are also designed to hold received clamping jaws with respect to the circumferential direction. The receiving devices each have a receiving contour that is complementary to an outer contour of the respective clamping jaw to be received. The receiving contour can be formed, for example, by a groove, in particular an axially extending groove, in particular a T-slot, of the receiving device. In particular, the number of receiving devices is a single number or a multiple of the number of adjusting elements and / or the number of radially adjustable clamping jaws.In particular, if the receiving contour is formed by a T-slot, the clamping jaws can have a substantially T-shaped cross-section that complements the cross-section of the T-slot. For example, the storage device with receiving devices is stationary and / or has no kinematics.

[0039] In a further embodiment of the invention, the receiving devices each have at least one locking device for, in particular, automatic and / or releasable locking transversely to the axial direction on the respective clamping jaw. Alternatively or additionally, the receiving devices each have at least one guide device, in particular with a guide pin. The guide device is designed to guide the respective clamping jaw to be received along the axial direction.

[0040] In a further embodiment of the invention, the storage device has, in particular, a plurality of positioning projections, each of which protrudes in the axial direction, in particular by the same distance, and which are arranged at a distance from one another along the circumferential direction of the clamping system. The positioning projections of the storage device can be arranged equidistant from one another along the circumferential direction, in particular with a uniform radial distance from the central axis of the clamping system. The positioning projections are arranged and designed to define at least two different rotational positions of the clamping mandrel relative to the storage device, wherein said rotational positions of the clamping mandrel are rotated around the central axis of the clamping system.

[0041] Expediently, three different rotational positions of the clamping mandrel relative to the storage device can be defined by means of the positioning projections. In particular, the positioning projections are designed and arranged to flank one of the adjusting elements or one of the jaw supports in pairs, in particular in each of the rotational positions of the clamping mandrel defined by the positioning projections.

[0042] A replaceable positioning element of the storage device, in particular one having a substantially pie-shaped and / or a substantially triangular cross-section with respect to the axial direction, can expediently be releasably attached to each of the positioning projections. In particular, the positioning elements can each be attached to an end of the respective positioning projection pointing in the axial direction. In the event of wear, the positioning elements can be replaced.

[0043] In a further embodiment of the invention, the clamping system comprises a positioning aid designed for the rotational positioning, in particular in a form-fitting manner, of the clamping group to be mounted on the housing, in particular relative to the housing. For example, the positioning aid can have an axially extending groove and a complementary engagement element for radial engagement in the axial groove. The groove can be provided on the housing and the engagement element on the clamping group – or vice versa. In this way, the alignment of the base body relative to the storage device, in particular with respect to the circumferential direction, can be ensured particularly reliably.

[0044] In a further embodiment of the invention, each of the clamping jaws is releasably attached to one of the adjusting elements of the clamping mandrel assigned to this clamping jaw or to one of the jaw supports of the clamping group assigned to this clamping jaw. In particular, the clamping jaws are each releasably attached to the adjusting elements or jaw supports assigned to them by means of a magnetic, locking, or screw connection device of the clamping system.

[0045] In a further embodiment of the invention, the clamping system comprises a number of locking devices, each designed to releasably lock one of the clamping jaws to one of the adjusting elements of the clamping mandrel assigned to this clamping jaw or to one of the jaw carriers of the clamping group assigned to this clamping jaw. The locking devices each comprise an actuating device. The actuating device of the respective locking device is self-resetting in the axial direction in order to release the locking of the respective clamping jaw by actuation. In particular, the locking of the respective clamping jaw can be automatically generated by means of the associated locking device by canceling the actuation of the actuation device. In particular, a locking device is assigned to each of the adjusting elements or each of the jaw carriers.The number of locking devices can therefore correspond to the number of adjusting elements or the number of jaw carriers.

[0046] In a further embodiment of the invention, the actuating devices of the locking devices and the storage device of the clamping system are coordinated with one another in such a way that the actuating devices can be actuated by means of the storage device, in particular simultaneously, by contacting them, by moving the clamping mandrel toward the storage device counter to the axial direction. In particular, the actuating devices can be actuated by reducing the distance between the adjusting elements or the jaw carriers and the storage device along the axial direction. The storage device can be designed in a ring shape.

[0047] The storage device can expediently have, in particular, a plurality of axial stop sections. In particular, the actuating devices of the locking devices can be actuated by contact with each axial stop section of the storage device.

[0048] When contact is established between the actuating devices and the storage device, the mandrel can be moved further towards the storage device in the opposite direction to the axial direction, so that the actuating devices are actuated by means of the storage device, in particular by pushing.

[0049] In a further embodiment of the invention, each of the locking devices comprises a locking element and an engagement structure. The locking element is adjustable relative to the engagement structure between a locking position and an unlocking position. In its locking position, the locking element engages the engagement structure, creating a radially effective, particularly inwardly effective, positive locking connection in order to releasably lock the respective clamping jaw to the adjusting element assigned to this clamping jaw or to the jaw carrier assigned to this clamping jaw. "Radially, particularly inwardly" refers in particular to the radial direction of the clamping system, which runs perpendicular to the central axis of the clamping system. In the unlocking position, the radially effective positive locking connection is canceled.In particular, in the unlocked position, the locking of the respective clamping jaw is released along the radial direction of the clamping system. The actuating device of the respective locking device has a particularly pin-shaped actuating component that is adjustable along the axial direction. The actuating component of the actuating device of the respective locking device is designed to adjust the locking element, particularly in a self-resetting manner, from the locking position to the unlocked position. By adjusting the actuating component along the axial direction, the locking of the respective clamping jaw can be released, particularly in a self-resetting manner.The actuating component of the respective locking device can be supported on a return spring of the respective locking device along the axial direction, wherein the return spring is designed and arranged for automatically resetting the actuating component, in particular together with the locking element.

[0050] In a further embodiment of the invention, the locking element of a respective locking device and - alternatively or additionally - the actuating component of the actuating device of the respective locking device are movably mounted, in particular directly and / or in contact, on an adjusting element assigned to the respective locking device or on a jaw carrier assigned to the respective locking device. The locking element and / or the actuating component can be movably mounted along the axial direction on the adjusting element assigned to the respective locking device or on the jaw carrier assigned to the respective locking device. The engagement structure of the respective locking device is formed on a radially inwardly open recess of the clamping jaw assigned to the respective adjusting element or the respective jaw carrier."Radially inward" refers in particular to the radial direction of the clamping system, which runs perpendicular to the center axis of the clamping system. It is understood that under certain circumstances, a reversed arrangement may be appropriate, whereby the engagement structure is present on the respective adjusting element or jaw carrier and the locking element is movably mounted on the respective clamping jaw.

[0051] In a further embodiment of the invention, the recess, which is open radially inward, extends longitudinally along a longitudinal direction, in particular parallel to the axial direction. The recess has a first recess region and a second recess region, wherein the first recess region and the second recess region merge into one another along the longitudinal direction. The first recess region can form a first end section and the second recess region can form a second end section of the recess, wherein the first end section and the second end section lie opposite one another along the longitudinal direction of the recess. The engagement structure of a respective locking device is present, in particular exclusively, in the second recess region.To lock the respective clamping jaw, the associated locking element can be inserted radially into the recess within the first recess region, in particular parallel to the radial direction of the clamping system, in order to then be adjusted from the first recess region along the longitudinal direction into the second recess region, thereby creating the radially outwardly effective positive locking, in particular in the manner of a hooking process. The locking element can be adjustable between the locking position and the unlocking position parallel to the longitudinal direction.

[0052] In a further embodiment of the invention, the recess, which is open radially inward, has a recess edge, in particular a closed, circumferential and / or keyhole-shaped recess edge. In particular, the recess edge can form a radially inner boundary of the recess with respect to the radial direction of the clamping system. The recess edge has at least one shoulder portion projecting transversely to the longitudinal direction of the recess, wherein the shoulder portion is provided by the engagement structure of a respective one of the locking devices. In particular, the respective engagement structure has two shoulder portions of the recess edge that are opposite one another transversely to the longitudinal direction and project transversely to the longitudinal direction, in particular toward one another.The at least one shoulder section can form an undercut with respect to the radial direction of the clamping system, to which the associated locking element can be hooked for locking the respective clamping jaw.

[0053] In a further embodiment of the invention, the respective locking element has a locking structure complementary to the at least one shoulder portion of the recess edge. The locking structure can be in the form of a groove, in particular in the form of a circumferential groove, and—alternatively or additionally—in the form of a substantially mushroom-shaped head portion of the locking element. In the locking position, the at least one shoulder portion of the associated engagement structure engages, in particular by hooking, into the locking structure, thereby creating the positive locking effect, in particular with respect to the radial direction of the clamping system, radially, in particular radially inwardly.

[0054] The recess, which is open radially inward, expediently has a recess base, in particular one that is closed radially outward. The recess can be designed in the form of an elongated blind hole.

[0055] In a further embodiment of the invention, the at least one, in particular each, shoulder portion of the engagement structure has a shoulder surface portion for, in particular slidingly, contacting the respective locking element inserted radially into the recess, in particular with respect to the radial direction of the clamping system. In particular, the undercut formed by the at least one shoulder portion is present on the shoulder surface portion and is designed to contact the respective locking element inserted radially into the recess. The shoulder surface portion extends with a gradient which urges the locking element contacting the shoulder surface portion radially, in particular i.e. along the radial direction of the clamping system, into the locking position.In particular, the shoulder surface section extends at an acute angle relative to the longitudinal direction of the recess and / or relative to the axial direction of the clamping system with the gradient. The acute angle can be 1° to 5°. In particular, the acute angle widens counter to the longitudinal direction of the recess, in particular counter to the axial direction. The shoulder surface section and the recess base can run parallel to one another. The shoulder surface section can also be inclined perpendicular to the gradient with respect to the radial direction, in particular by an inclination angle of 30° to 60°, more particularly 45°.

[0056] In a further embodiment of the invention, the clamping system comprises a number of clamping jaw positioning aids. The clamping jaw positioning aids are designed for the positive positioning of a respective clamping jaw, particularly with respect to the axial direction and the circumferential direction of the clamping system, on the respective adjusting element of the clamping mandrel assigned to this clamping jaw or on the jaw carrier of the clamping group assigned to this clamping jaw. In particular, each of the clamping jaw positioning aids comprises at least one positioning pin, particularly elongated along the radial direction of the clamping system, and at least one positioning bore complementary to the positioning pin.The at least one positioning pin and the at least one positioning bore formed complementarily thereto can be attached, in particular in a precisely fitting manner, either to the mutually associated clamping jaws and adjusting elements or to the mutually associated clamping jaws and jaw supports.

[0057] In a further embodiment of the invention, the clamping group comprises at least one resiliently deformable spring device, in particular in the form of a tension spring ring. The resiliently deformable spring device is configured, for example, to extend circumferentially around the central axis of the clamping system, in particular along the circumferential direction. The resiliently deformable spring device is prestressed and / or can be prestressed in order to collectively pull or push all clamping jaws radially inward. The adjusting elements or the jaw supports can have recesses that are recessed along the radial direction and extend along the circumferential direction, in which the resiliently deformable spring device is partially received.

[0058] In a further embodiment of the invention, the clamping mandrel has a spring-elastic preload element for each adjusting element to generate a spring force. The spring force presses the contact section of the respective adjusting element radially against the control contour. In this way, the adjusting elements can be automatically repositioned radially inward when the control element is adjusted counter to the axial direction. The spring device described in the previous paragraph can functionally support the preload elements.

[0059] In a further embodiment of the invention, the clamping mandrel has a number of sealing elements, each of which is assigned one of the adjusting elements. Each of the sealing elements at least partially covers a gap that exists between the housing and the adjusting element assigned to the respective sealing element. The clamping jaws each have a sealing contour that is matched to one of the sealing elements to form a, in particular telescopic, radially variable labyrinth seal for the gap. The sealing contour and the sealing elements can therefore be arranged in a nested manner, such that the labyrinth seal at least substantially retains its sealing effect when the clamping jaws are radially adjusted by means of the adjusting elements. The labyrinth seal can be a non-contact seal.The sealing element can have a radially projecting collar, wherein the sealing contour of the clamping jaw has a radially recessed groove.

[0060] A method according to the invention serves for the, in particular automatic, interchangeable mounting of the clamping group of a clamping system according to the invention corresponding to the above description on the clamping mandrel of this clamping system. In this respect, the method enables the utilization of the above-described advantages of the clamping system according to the invention. The method comprises a step a), according to which the clamping group, which is interchangeably mounted on the clamping mandrel, is positioned on a storage device, in particular the storage device of the clamping system. In particular, the storage device of the clamping system is stationary.Preferably, the clamping group, which is replaceably mounted on the mandrel, is positioned on the storage device by means of a drive device, in particular an automatic drive device of the clamping system, wherein the drive device is configured to adjust the mandrel along and transversely, in particular perpendicularly, to the axial direction and to rotate the mandrel about the central axis of the clamping system. The method further comprises a step b), according to which the control element is adjusted counter to the axial direction, which is accompanied by a coordinated adjustment of the adjusting elements, in particular spring-force-supported, radially inward in order to move the adjusting elements away from the clamping jaws of the clamping group, so that the clamping group is stored.The method further comprises a step c), according to which the clamping mandrel is positioned, in particular along the axial direction and / or radially and / or along the circumferential direction of the clamping system, relative to a further stored clamping group of the clamping system. The further stored clamping group is located in particular on the same storage device or on a further storage device of the clamping system. Furthermore, the method comprises a step d), according to which the control element is adjusted in the axial direction, which is accompanied by a coordinated adjustment of the adjusting elements radially outwards. The control element is adjusted in the axial direction and the adjusting elements radially outwards in order to adjust the adjusting elements towards the clamping jaws of the further clamping group, in particular to attach the adjusting elements directly or indirectly to the clamping jaws of the further clamping group.

[0061] In one embodiment of the method, the clamping group is replaced by the additional clamping group during the clamping group change, wherein the clamping mandrel is moved relative to the storage device along the axial direction during the clamping group change. In particular, the clamping group is replaced by the additional clamping group during the clamping group change. In particular, at least one movement component of the movement of the clamping mandrel relative to the storage device during the clamping group change extends parallel and / or coaxially to the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Further advantages and aspects of the invention will become apparent from the claims and the following description of preferred embodiments of the invention, which are illustrated with reference to the drawings. Like reference numerals refer to like, similar, or functionally identical components.

[0063] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention. Fig. 1 shows in a schematic axial section an embodiment of a clamping system according to the invention, Fig. 2 a detail of a schematic axial section of the clamping system according to Fig. 1, Fig. 3 a detail of a schematic axial section of a further embodiment of the clamping system according to the invention, Fig. 4 a detail of a schematic axial section of a further embodiment of the clamping system according to the invention, Fig. 5 a detail of a schematic axial section of a further embodiment of the clamping system according to the invention, Fig. 6 a schematic flow diagram for the implementation of a method according to the invention for the interchangeable mounting of a clamping group of a clamping system according to the invention on a clamping mandrel of this clamping system, Fig. 7 in a schematic perspective view of a clamping group of the clamping system according to the Fig. 1 and 2 on a storage device of the clamping system, Fig. 8 in a schematic perspective view of another embodiment of a clamping system according to the invention, Fig. 9 a detail of a schematic perspective radial section of the clamping system according to Fig. 8, Fig. 10 a detail of a schematic perspective view of the clamping system according to the Fig. 8 and 9 , wherein for better clarity a single clamping jaw of the clamping system is hidden, Fig. 11 a schematic perspective view of a further embodiment of the clamping system according to the invention, Fig. 12 a detail of a schematic perspective radial section of the clamping system according to Fig. 11 , Fig. 13 a detail of a schematic axial section of the clamping system according to the Fig. 8 to 10 , Fig. 14 a detail of a schematic axial section of a further embodiment of the clamping system according to the invention, Fig. 15 a schematic perspective view of a clamping jaw for the clamping system according to Fig. 14 , Fig. 16 a detail of a schematic perspective view of the clamping system according to Fig. 14with the clamping jaws hidden for clarity, Fig. 17 a detail of a schematic axial section of a further embodiment of the clamping system according to the invention, Fig. 18 in a schematic radial section the clamping system according to Fig. 17 , Fig. 19 a detail of a schematic exploded view of the clamping system according to the Fig. 17 and 18 , Fig. 20 a detail of a schematic perspective view of the clamping system according to the Fig. 17 to 19 , Fig. 21a detail of an axial section of the clamping system according to the Fig. 17 to 20 , Fig. 22 another detail of a schematic axial section of the clamping system according to the Fig. 17 to 21 , Fig. 23in schematic perspective view the clamping system according to the Fig. 17 to 22 , and Fig. 24 in schematic front view against an axial direction the clamping system according to the Fig. 17 to 23 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0064] A clamping system 1 according to the invention is provided for an electric motor stator 100 to be coated with impregnating resin. In other words, the clamping system 1 is suitable and / or configured for clamping, in particular force-fitting, the electric motor stator 100 to be coated with impregnating resin.

[0065] The clamping system 1 has a universal clamping mandrel 2. The clamping mandrel 2 comprises a housing 3, which extends along an axial direction A of the clamping system 1. Furthermore, the universal clamping mandrel 2 has a control element 4, which is adjustably guided relative to the housing 3 along the axial direction A. Furthermore, the universal clamping mandrel 2 comprises a number of adjusting elements 5, which are radially adjustable relative to the housing 3 by means of the control element 4.

[0066] In the present context, "radial" refers to a radial direction R of the clamping system 1 that runs perpendicular to the axial direction A. A circumferential direction U of the clamping system 1 runs perpendicular to the axial direction A and perpendicular to the radial direction R, in this case around a central axis M of the clamping system 1 that extends along the axial direction A.

[0067] The clamping system 1 has a clamping group 6 that can be replaced and mounted on the clamping mandrel 2 and is designed specifically for the workpiece. For the workpiece-specific design of the clamping group 6, the clamping diameter and / or length of the clamping group 6 can be matched to the workpiece to be clamped, i.e., to the electric motor stator 100 to be sprayed. The clamping group 6 has a number of clamping jaws 7 for clamping the electric motor stator 100 to be sprayed, wherein the clamping jaws 7 can each be radially adjusted by means of one of the adjusting elements 5. By radially adjusting the clamping jaws 7, an outer clamping diameter of the clamping system 1 can be expanded.

[0068] Clamping group 6 is configured so that all components of clamping group 6 can be replaced simultaneously during a clamping group change. For example, clamping jaws 7 are components of clamping group 6.

[0069] The number of adjusting elements 5 is, for example, three. The number of clamping jaws 7 that can be radially adjusted by means of the adjusting elements 5 corresponds, for example, to the number of adjusting elements 5. The adjusting elements 5 can be designed as pistons and / or bolts. The adjusting elements 5 can each be guided radially, in particular linearly, movably in a bore of the housing 3.

[0070] For example, the control element 4 has a control section 8. The control section 8 can be tapered in the axial direction A of the clamping system 1.

[0071] The control section 8 has, for example, a control contour 9 of the control element 4. The control contour 9 runs, for example, obliquely to the axial direction A and obliquely to the radial direction R. The adjusting elements 5 each have a contact section 10 which taps off the control contour 9 - in this case in a touching manner. The contact section 10 of the adjusting elements 5 taps off the control contour 9 in such a way that an adjustment of the control element 4 in the axial direction A is accompanied by a coordinated adjustment of the adjusting elements 5 radially outwards. In other words: if the control element 4 is adjusted in the axial direction A relative to the housing 3, the adjusting elements 5 experience a coordinated adjustment radially outwards depending on the adjustment of the control element 4.

[0072] The control section 8 can be substantially conical in the area of ​​the control contour 9. In this respect, the control section 8 can, for example, form a feed cone of the mandrel 2, see in particular Fig. 1 to 5 and 13. By adjusting the feed cone in the axial direction A, the adjusting elements 5 can be displaced radially outwards in a wedge-gear manner in order to expand a clamping diameter of the clamping system 1 or the clamping group 6.

[0073] For example, a respective one of the contact sections 10 engages the control contour 9 at a control contour section 55 of the control contour 9 assigned to this contact section 10. According to the examples of Fig. 17 to 24 a respective one of the contact sections 10 engages the control contour 9 precisely at a control contour section 55 of the control contour 9 that is exclusively assigned to the respective contact section 10.

[0074] For example, the contact sections 10 and the control contour sections 55 assigned to them are coupled to one another in such a way that an adjustment of the control element 4 in the axial direction A is accompanied by a coordinated adjustment of the adjusting elements 5 radially outwards, and an adjustment of the control element 4 opposite to the axial direction A is accompanied by a coordinated adjustment of the adjusting elements 5 radially inwards. The contact sections 10 and the control contour sections 55 assigned to them can - as can be seen, for example, from the Fig. 17 to 19 and 21 and 22 - are forcibly coupled to one another, so that the adjusting elements 5 can be actively moved radially outwards by adjusting the control element 4 in the axial direction A and can be actively retracted radially inwards by adjusting the control element 4 opposite to the axial direction A.

[0075] Mutually associated control contour sections 55 and contact sections 10 have, for example, complementary coupling regions 56. The complementary coupling regions 56 of a respective control contour section 55 and of the contact section 10 associated with this control contour section 55 can be substantially T-shaped and / or profiled. According to the examples in Fig. Fig. 17 to 19 and 21 and 22, the coupling area 56 of the actuating elements 5 is designed as a T-body section 58, whereas the coupling area 56 of the control element 4, which is designed in a complementary manner thereto, is designed as a T-groove 57. The T-grooves 57 and the T-body sections 58 are each arranged, for example, in a star shape along the circumferential direction U around the central axis M, in particular as shown in the Figs. 18 and 19 recognizable.

[0076] For example, the coupling region 56 of each of the control contour sections 55 is slidably engaged with the coupling region 56 of the contact section 10 assigned to this control contour section 55, obliquely to the axial direction A. The sliding mobility of mutually contacting coupling regions 56 can be defined by a guide direction B of the respective control contour section 55 running obliquely to the axial direction A. A positive connection effective with respect to the circumferential direction U can be formed between mutually contacting coupling regions 56. Furthermore, the positive connection between mutually contacting coupling regions 56 can act perpendicularly to the associated guide direction B on all sides. Said positive connection serves in particular to positively couple the contact sections 10 with the control contour sections 55 assigned to them.

[0077] For example, each control contour section 55 defines its own guide direction B, in particular through its respective profile direction. The guide directions B defined by the control contour sections 55 intersect one another in the present case on the central axis M. The guide directions B can run obliquely to the central axis M and relative to one another. In particular, the guide directions B can follow a virtual feed cone surface, the imaginary tip of which, pointing in the axial direction A, corresponds to the common intersection point of all guide directions B on the central axis M. For example, the clamping mandrel 2 has an actuating element 11 for adjusting the control element 4 counter to the axial direction A. The actuating element 11 is guided so as to be adjustable relative to the housing 3 along the axial direction A. The actuating element 11 can be designed like a tappet.Such a plunger-like actuating element 11 can, as in the present case, transmit a compressive force axially to the control element 4.

[0078] The clamping mandrel 2 has, for example, a guide device 29. The guide device 29 is in this case designed as a hollow shaft, at least in some regions. In this case, the guide device 29 is designed entirely as a hollow shaft. The guide device 29 serves to axially movably guide the actuating element 11 for adjusting the control element 4 counter to the axial direction A. The guide device 29 is axially connected to the housing 3, in this case in axial direction A. The guide device 29 can be connected to the housing 3 with or without the same material. In this case, the guide device 29 is connected to the housing 3 with a different material, i.e. the guide device 29 and the housing 3 are designed as separate components.

[0079] For example, the clamping mandrel 2 has a resiliently deformable preloading device 32. The resiliently deformable preloading device 32 is designed to generate a preload force acting on the control element 4 in the axial direction A. The preload force generated by the preloading device 32 serves to radially advance the clamping jaws 7, in particular automatically. For example, the resiliently deformable preloading device 32 can comprise a disc spring assembly—as in the embodiments shown. The preloading device 32 can be designed to generate the preload force with a magnitude of up to approximately 4.5 kN.The preload force that can be generated by means of the preload device 32 can be distributed and / or translated to the actuating elements 5 by interaction of the control contour 9 with the contact sections 10 of the actuating elements 5 in order to provide a radial clamping force for clamping the electric motor stator 100 to be clamped at its inner diameter.

[0080] In this case, the control element 4 is axially adjustable relative to the housing 3 against the preload force, for example, to release the control element 4 and / or the radial advance of the clamping jaws 7. By releasing the control element 4 and / or the radial advance of the clamping jaws 7, a radial clamping of the electric motor stator 100 to be sprayed can be released.

[0081] The clamping mandrel 2 has, for example, a support device 30. The support device 30 can be designed like a hollow shaft, at least in some regions. In the present case, the support device 30 is designed entirely like a hollow shaft. The support device 30 serves to axially support the pretensioning device 32 relative to the control element 4. In this case, the support device 30 is connected axially to the housing 3, in particular counter to the axial direction A. The support device 30 can be connected to the housing 3 with the same or different material. In the present case, the support device 30 is connected to the housing 3 with different material, i.e. the support device 30 and the housing 3 are designed as separate components. The support device 30 and the guide device 29 can be arranged on end faces of the housing 3 that are opposite one another along the axial direction A.The support device 30 and the guide device 29 can - as in the present case - be designed as identical parts.

[0082] The preload force generated by the preload device 32 forces the clamping jaws 7, in particular automatically, radially outward. In this way, an electric motor stator 100 clamped by the clamping system 1 can be automatically held on the clamping jaws 7. The adjusting elements 5 can thus be indirectly preloaded radially outward.

[0083] For example, the control element 4 has at least one projection 12 which projects from the control section 8 in the axial direction A. In the present case, there are three such projections 12 which are arranged equidistantly along the circumferential direction U. The projections 12 are arranged eccentrically, i.e. at a radial distance from the central axis M. For example, the projections 12 are arranged at a uniform radial distance from the central axis M. The actuating element 11 of the clamping mandrel 2 can be pressed against the at least one projection 12 - or in this case against the projections 12 - counter to the axial direction A in order to adjust the control element 4 counter to the axial direction A. As already mentioned, an adjustment of the clamping jaws 7 can be released by adjusting the control element 4. In this respect, the adjustment of the actuating element 11 counter to the axial direction A can release the adjustment of the clamping jaws 7.In alternative embodiments, the actuating element 11 of the clamping mandrel 2 can have at least one projection 12 protruding counter to the axial direction A, in particular eccentrically arranged, wherein the projection 12 of the actuating element 11 can be pressed against the control element 4 counter to the axial direction A in order to adjust the control element 4 counter to the axial direction A, in particular in order to release a feed of the clamping jaws 7.

[0084] The projection 12 can, for example, be in positive engagement with the actuating elements 5 and / or the housing 3 along the circumferential direction U. The positive engagement between the projection 12 and the actuating elements 5 and / or the housing 3 can secure the control element 4 against rotation relative to the actuating elements 5 and / or the housing 3. By means of the at least one projection 12, a relatively large force transmission surface can be provided for pressing the actuating element 11 against the control element 4. A particularly large force transmission surface can be achieved by providing several projections 12, as is the case here.

[0085] For example, when the clamping group 6 is mounted on the mandrel 2, one of the adjusting elements 5 and one of the clamping jaws 7 are assigned to each other. The adjusting elements 5 and clamping jaws 7 assigned to each other can be arranged directly or indirectly adjacent to each other, in particular connected to each other.

[0086] The clamping system 1 has, for example, a drive device 51. The drive device 51 can be operated automatically. The drive device 51 serves to adjust the clamping mandrel 2 along the axial direction A, in particular for changing the clamping group. The drive device 51 also serves to adjust the clamping mandrel 2 transversely, in particular perpendicularly, to the axial direction A, for example, to adjust or move the clamped electric motor stator 100 through various process stations for trickle impregnation. Furthermore, the drive device 51 serves to rotate the clamping mandrel 2 about the central axis M of the clamping system 1, in particular to promote a circumferential impregnation resin application for trickle impregnation.

[0087] The clamping system 1 can, for example, have a positioning aid 28. The positioning aid 28 serves for a rotational positioning, in particular a positive-locking one, of the clamping group 6 to be mounted on the housing 3, in particular relative to the housing 3.

[0088] For example, the clamping system 1 has a number of clamping jaw positioning aids 75, see in particular Fig. 20The clamping jaw positioning aids 75 are particularly different from the positioning aids 28. The clamping jaw positioning aids 75 can be designed for the positive positioning of a respective one of the clamping jaws 7 on the respective adjusting elements 5 of the clamping mandrel 2 assigned to this clamping jaw 7, in this case with respect to the axial direction A and the circumferential direction U of the clamping system 1. Each of the clamping jaw positioning aids 75 can have at least one positioning pin 76 and at least one positioning bore 77 complementary thereto. The positioning pin 76 and the associated positioning bore 77 can be attached in a coordinated manner to the mutually assigned clamping jaws 7 and adjusting elements 5.

[0089] For example, the clamping mandrel 2 has a resiliently deformable preload element 37 for each adjusting element 5, which serves to generate a spring force. The spring force presses the contact section 10 of the respective adjusting element 5 radially, in particular inwardly, against the control contour 9. In particular, the spring force counteracts a lifting of the contact sections 10 from the control contour 9.

[0090] According to the Fig. 1 , 2 , 3 and 7 The associated adjusting elements 5 and clamping jaws 7 are arranged indirectly next to each other. Fig. 4, 5 and 8 to 14 mutually associated adjusting elements 5 and clamping jaws 7 arranged directly next to one another, in particular placed next to one another.

[0091] In the embodiments according to the Fig. 1 , 2 , 3 and 7For example, the clamping group 6 comprises a sleeve-shaped base body 13 and a number of jaw supports 14 that are radially adjustable relative to the base body 13. The base body 13 and the jaw supports 14 are presently components of the clamping group 6. The jaw supports 14 can be piston-like and / or bolt-like. The jaw supports 14 are each designed to support one of the clamping jaws 7, in particular in an interchangeable or non-interchangeable manner. In the present case, the jaw supports 14 are each designed to interchangeably support one of the clamping jaws 7.

[0092] The jaw supports 14 are, for example, each radially adjustable by means of one of the adjusting elements 5 in such a way that clamping jaws 7 carried by the jaw supports 14 can each be radially adjusted by means of one of the adjusting elements 5.

[0093] The clamping jaws 7 are in accordance with Fig. 1 , 2 , 3 and 7for example, formed separately from the jaw supports 14 and detachably connected to one of the jaw supports 14 each. In alternative embodiments, the clamping jaws 7 can be non-detachably connected to one of the jaw supports 14 each. If the clamping jaws 7 are detachably connected to a respective one of the jaw supports 14, then the clamping jaws 7 can be carried interchangeably by the respective jaw support 14. If the clamping jaws 7 are non-detachably connected to the respective one of the jaw supports 14, then the clamping jaws 7 can be carried non-replaceably by the respective jaw support 14. In alternative embodiments - not shown - the clamping jaws 7 can be formed integrally on the jaw support 14 which carries them non-replaceably. If the clamping jaws 7 are carried non-replaceably by the respective jaw supports 14, it is conceivable to design the jaw supports 14 together with the permanently carried clamping jaws 7 to be interchangeable.

[0094] According to the Fig. 1 , 2 , 3 and 7 The jaw supports 14 are each arranged radially between one of the adjusting elements 5 and the clamping jaw 7 carried by the respective jaw support 14 when the clamping group 6 is mounted on the mandrel 2. In this way, one of the clamping jaws 7 can be connected to one of the adjusting elements 5 by means of one of the jaw supports 14. The jaw supports 14 can thus transmit the radial adjustment of the adjusting elements 5 to the clamping jaws 7.

[0095] According to the Fig. 1 , 2 , 3 and 7 The clamping mandrel 2—in this case, its housing 3—has, for example, an axial stop 15. The clamping group 6 is axially positioned against the axial stop 15 when it is replaceably mounted on the clamping mandrel 2. The axial stop 15 is, for example, circumferential and / or shoulder-shaped.

[0096] In some embodiments, such an axial stop 15 can be dispensed with, in particular if a positioning accuracy for the clamping group change with respect to the axial direction A is sufficiently high.

[0097] According to the embodiments according to the Fig. 1 , 2 , 3 and 7 The clamping system 1 can have a snap-in connection device 16. The snap-in connection device 16 serves, for example, for the, in particular automatic and / or releasable, snap-in connection of the housing 3 and the clamping group 6 mounted thereon, in particular on the base body 13.

[0098] According to the Fig. 1 , 2 , 3 and 7For example, the clamping group 6 has at least one resiliently deformable spring device 36—in this case, two resiliently deformable spring devices 36. The spring device 36 is a component of the clamping group 6. The spring device 36 can be designed in the form of a tension spring ring. The spring device 36 is designed to extend circumferentially around the central axis M of the clamping system 1. The spring device 36 is prestressed and / or can be prestressed in order to force all clamping jaws 7 together radially inward, in particular to pull or push them.

[0099] According to the Fig. 7 to 9 , 11 to 13 , 17 and 21 to 24For example, the clamping system 1 has a storage device 17 for storing the replaced and / or to-be-replaced clamping group 6. The storage device 17 can be stationary. In particular, the storage device 17 serves for the automatic storage of the replaced and / or to-be-replaced clamping group 6.

[0100] In particular, according to Fig. 7The base body 13 and the storage device 17 have, for example, complementary alignment aids 18. By means of the complementary alignment aids 18, the base body 13 can be aligned relative to the storage device 17, in particular with respect to the circumferential direction U and / or with respect to the radial direction R and / or with respect to the axial direction A. The base body 13 and the storage device 17 have complementary locking sections 20 for releasably connecting the base body 13 and the storage device 17. The locking sections 20 can form a bayonet lock 19 of the clamping system 1. In the present case, the storage device 17 also has a cover device 21, which is, for example, circular disk-shaped.The covering device 21 can be spring-mounted for axial application to the base body 13 in such a way, in particular axially, that the locking section 20 of the base body 13 can be covered at least partially, in particular axially, by means of the covering device 21 when the base body 13 and the storage device 17 are releasably connected to one another.

[0101] According to the Fig. 8 , 9 , 11, 12 , 13and 23 and 24, the storage device 17 has, for example, a number of receiving devices 22, each of which is designed to receive a clamping jaw 7 along the axial direction A and to radially hold received clamping jaws 7. The receiving devices 22 each have, for example, a receiving contour 23 that is complementary to an outer contour 24 of the respective clamping jaw 7 to be received. The number of receiving devices 22 can be a single number or a multiple of the number of adjusting elements 5 and / or the number of radially adjustable clamping jaws 7. The receiving devices 22 are arranged, for example, along the circumferential direction U, in particular equidistantly and / or with a uniform radial distance with respect to the central axis M. The storage device 17 can have a substantially annular device body on which the receiving devices 22 are arranged.

[0102] According to the Fig. 8 , 9 , 11, 12 and 13the receiving devices 22 each have, for example, a locking device 25. The locking device 25 serves for, for example, automatic and / or releasable locking transversely to the axial direction A on the respective received clamping jaw 7. Alternatively or additionally, the receiving devices 22 each have at least one guide device 26 which is designed to guide the respective clamping jaw 7 to be received along the axial direction A. The guide device 26 can alternatively or additionally be designed to radially hold the respective clamping jaw 7 to be received. For example, the guide device 26 can have a guide pin 27. For example, the storage device 17 has positioning projections 78. The positioning projections 78 each project, for example, in the axial direction A and are arranged at a distance from one another along the circumferential direction U of the clamping system 1.For example, the positioning projections 78 are arranged equidistant from one another along the circumferential direction U. The positioning projections 78 are arranged and designed, for example, to define at least two rotational positions of the clamping mandrel 2 relative to the storage device 17 that are rotated relative to one another with respect to the central axis M of the clamping system 1. For example, three such rotational positions are defined by means of the positioning projections 78, see in particular. Fig. 8 , 11 as well as 23 and 24.

[0103] A replaceable positioning element 79 of the storage device 17 can be releasably attached to each of the positioning projections 78. For example, such a positioning element can be substantially pie-shaped. Alternatively or additionally, such a positioning element 79 can have a substantially triangular cross-section with respect to the axial direction A.

[0104] According to the embodiments according to the Fig. 4 and 5 , 8 to 19 , 21 and 22 the clamping group 6 has, in particular exclusively, the number of clamping jaws 7. In contrast, the clamping group 6 in the embodiments according to the Fig. 1 , 2 , 3 and 7 for example, the number of clamping jaws 7 as well as the base body 13 and the jaw carriers 14.

[0105] According to the embodiments according to the Fig. 1 , 2 , 3 and 7 Each of the clamping jaws 7 is detachably fastened to a jaw carrier 14 of the clamping group 6 assigned to this clamping jaw 7. In the embodiments according to the Fig. 4, 5 , 8 to 19 , 21 and 22 each of the clamping jaws 7 is detachably fastened to one of the adjusting elements 5 of the clamping mandrel 2 assigned to this clamping jaw 7.

[0106] For the detachable fastening of the clamping jaws 7, a magnetic connection device 33 or a snap-in connection device 34 or a screw connection device 35 of the clamping system 1 can be provided for each clamping jaw 7.

[0107] For example, the clamping system 1 has a number of locking devices 60, see in particular Fig. 17 to 19 and 21 and 22. Each of the locking devices 60 is designed, for example, for releasably locking one of the clamping jaws 7 to one of the adjusting elements 5 of the clamping mandrel 2 assigned to this clamping jaw 7. In this case, the locking devices 60 each have an actuating device 61, which can be actuated in a self-resetting manner in the axial direction A in order to release the locking of the respective clamping jaw 7 to the adjusting element 5.

[0108] For example, the actuating devices 61 of the locking devices 60 and the, for example, ring-shaped, storage device 17 of the clamping system 1 are coordinated with one another in such a way that the actuating devices 61 can be actuated by contact using the storage device 17 by moving the clamping mandrel 2 counter to the axial direction A toward the storage device 17. The storage device 17 can have axial stop sections 80, wherein a respective actuating device 61 can be actuated by means of one of the axial stop sections 80. For example, all actuating devices 61 can be actuated simultaneously by contact using the storage device 17. In particular, the actuating devices 61 can be actuated by pushing using the storage device 17.

[0109] Each of the locking devices 60 has, for example, its own locking element 62 and its own engagement structure 63. The locking element 62 of a respective locking device 60 is adjustable relative to the engagement structure 63 of this locking device 60 between a locking position VS and an unlocking position ES. In the illustration according to Fig. 17 the locking element 62 is in the locking position VS. In contrast, the locking element 62 is in the illustrations according to the Figs. 21 and 22 in the unlocking position ES.

[0110] For example, in the locking position VS, the locking element 62 engages the engagement structure 63, generating a positive locking FS effective along the radial direction R, in this case inwardly, in order to releasably lock the respective clamping jaw 7 to the actuating element 5 assigned to this clamping jaw 7. In the unlocking position ES, for example, at least the portion of the positive locking FS effective inwardly along the radial direction R is canceled.

[0111] The actuating device 61 of the respective locking device 60 has, for example, an actuating component 64 that is adjustable along the axial direction A. The actuating component 64 is, for example, pin-shaped. The actuating component 64 is designed, for example, for adjusting the locking element 62 from the locking position VS to the unlocking position ES, in particular in a self-resetting manner.

[0112] The actuating component 64 can be supported on a return spring 65 of the respective locking device 60 along the axial direction A, wherein the return spring 65 serves for the self-resetting of the actuating component 64 together with the locking element 62 from the unlocking position ES into the locking position VS.

[0113] For example, the locking element 62 of the respective actuating device 61 is movably mounted on one of the actuating elements 5 assigned to the respective locking device 60, in particular along the axial direction A. Alternatively or additionally, the actuating component 64 of the actuating device 61 can be movably mounted on the actuating element 5 assigned to the respective locking device 60, in particular along the axial direction A.

[0114] For example, the engagement structure 63 of the respective locking device 60 is formed on a recess 66, which is open radially inward along the radial direction R, of the clamping jaw 7 assigned to the respective actuating element 5.

[0115] The recess 66 extends longitudinally, for example, along a longitudinal direction VL, which in this case extends parallel to the axial direction A. The recess 66 has, for example, a first recess region 67 and a second recess region 68, wherein the first recess region 67 and the second recess region 68 merge into one another along the longitudinal direction VL. The engagement structure 63 is present, for example, in particular exclusively, in the second recess region 68.To lock the respective clamping jaw 7, the respective locking element 62 can be inserted into the recess 66 within the first recess region 67 along the radial direction R, in order to then be adjusted from the first recess region 67 along the longitudinal direction VL into the second recess region 68 and thus to generate the positive locking FS acting radially outwards along the radial direction R.

[0116] For example, the recess 66 has a recess edge 69. The recess edge 69 can be circumferential. Alternatively or additionally, the recess edge 69 can be keyhole-shaped, particularly when viewed in the radial direction R.

[0117] The engagement structure 63 comprises, for example, at least one shoulder portion 70 of the recess edge 69 projecting transversely to the longitudinal direction VL, in particular along the circumferential direction U. In the present case, the recess edge 69 has two shoulder portions 70 which are opposite one another transversely to the longitudinal direction VL and which are provided by the respective engagement structure 63.

[0118] The respective locking element 62 has, for example, a locking structure 71 designed to complement the at least one shoulder section 70 of the recess edge 69. In the present case, the locking structure 71 is designed in the form of a circumferential groove 72, to which a substantially mushroom-shaped head section 73 of the locking element 62 adjoins radially outward along the radial direction R. In the locking position VS, the at least one shoulder section 70 engages in the locking structure 71, generating the positive connection FS effective along the radial direction R, in this case radially inward.

[0119] For example, the recess 66 has a recess bottom 74. The recess bottom 74 can be closed radially outward along the radial direction R.

[0120] In the present case, the shoulder sections 70 each have a shoulder surface section KF. The shoulder surface section KF is designed for, in particular sliding, contact with the locking element 62 inserted into the recess 66 along the radial direction R. The shoulder surface section KF runs at a gradient in the present case. The gradient can force the locking element 62 contacting the shoulder surface section KF along the radial direction R into the locking position VS. The shoulder surface section KF can run at an acute angle α relative to the longitudinal direction VL and—alternatively or additionally—with the gradient relative to the axial direction A. The acute angle α can be 1° to 5°.

[0121] In the present case, both shoulder surface sections KF are set at an inclination angle superimposed on the gradient, in particular of approximately 45°, relative to the radial direction R, so that the shoulder surface sections KF enclose a centring angle opening radially outwards, in particular of approximately 90°, for centring the locking element 62 between the shoulder sections 70.

[0122] The recess bottom 74 can extend parallel to the shoulder surface sections KF, in particular so that the recess bottom 74 and the shoulder surface sections KF are part of an inner profile contour of the recess 66 oriented perpendicular to the gradient.

[0123] It is conceivable to provide a locking device 60 in the manner already explained for releasably securing the clamping jaws 7 in embodiments with jaw supports 14. Alternatively or additionally, it is conceivable to also provide clamping jaw positioning aids 75 in the manner already explained in embodiments with jaw supports 14.

[0124] As exemplified by the Figs. 14, 15 and 16As can be seen, the clamping mandrel 2 can, for example, have a number of sealing elements 38. Each of the sealing elements 38 is assigned one of the adjusting elements 5. Each of the sealing elements 38 at least partially covers a gap 39 which is present between the housing 3 and the adjusting element 5 assigned to the respective sealing element 38. The clamping jaws 7 each have a sealing contour 40. The sealing contour 40 is matched to one of the sealing elements 38 in order to form a radially variable labyrinth seal 41 for the gap 39, in particular a telescopic and / or nested one.

[0125] One, especially based on the Fig. 6 comprehensible, inventive method V serves for the exchangeable assembly of the clamping group 6 of the clamping system 1, which, for example, according to the Fig. 1 to 5and 7 to 24, on the mandrel 2 of the clamping system 1. In particular, the method V enables automatic interchangeable assembly, ie an automatic clamping group change.

[0126] Method V comprises a step a), according to which the clamping group 6, which is replaceably mounted on the mandrel 2, is positioned on the storage device 17. For example, the clamping group 6, which is replaceably mounted on the mandrel 2, is positioned on the storage device 17 by means of the drive device 51, in particular automatically.

[0127] Method V further comprises a step b), according to which the control element 4 of the clamping mandrel 2 is adjusted counter to the axial direction A, whereby the adjusting elements 5 are adjusted radially inward, in particular by spring force, in order to move the adjusting elements 5 away from the clamping jaws 7 of the clamping group such that the clamping group 6 is deposited on the depositing device 17. By depositing, the clamping group 6 is removed from the clamping mandrel 2.

[0128] Method V further comprises a step c), according to which the mandrel 2 is positioned relative to another stored clamping group 6 of the clamping system 1, for example along the axial direction A and / or radially and / or along the circumferential direction U of the clamping system 1. In particular, the another stored clamping group 6 is located on the same storage device 17 or on another storage device 17 of the clamping system 1.

[0129] Furthermore, the method comprises a step d), according to which the control element 4 is adjusted in the axial direction A, whereby the adjusting elements 5 are adjusted radially outwards in a coordinated manner in order to adjust the adjusting elements 5 towards the clamping jaws 7 of the further clamping group 6, in particular so that the adjusting elements 5 are attached directly or indirectly to the clamping jaws 7 of the further clamping group 6.

[0130] During the clamping group change, the clamping group 6 is replaced by the further clamping group 6. During the clamping group change, the clamping mandrel 2 is moved relative to the storage device 17 along the axial direction A. In particular, during the clamping group change, at least one movement component of the movement of the clamping mandrel 2 relative to the storage device 17 is parallel. Alternatively or additionally—as in the present case—at least one movement component of the clamping mandrel 2 relative to the storage device 17 can extend coaxially to the axial direction A during the clamping group change.

[0131] The steps of procedure V are, for example, carried out in the chronological order according to Fig. 6 carried out, ie in the chronological order a), b), c), d).

[0132] For the embodiments according to the Fig. 1 , 2 , 3 and 7Method V can be specified as follows: For the interchangeable assembly of the clamping group 6, the clamping mandrel 2 is first positioned in the axial direction A on the clamping group 6 to be assembled. When the base body 13 is in contact with the axial stop 15, the preload device 32 is relieved by adjusting the control element 4, in particular together with the actuating element 11. At the same time, the adjusting elements 5 are adjusted radially outward in a coordinated manner. The radially outwardly adjusted adjusting elements 5 can then form-fit the base body 13 to the housing 3 with respect to the circumferential direction U. If the clamping mandrel 2 is now rotated about the central axis M, the base body 13 follows the rotational movement of the clamping mandrel 2 due to the form-fit connection by means of the adjusting elements 5.Accordingly, the bayonet lock 19 can be unlocked, so that after unlocking the bayonet lock 19, the clamping mandrel 2 together with the clamping group 6 mounted thereon in an interchangeable manner can be removed from the storage device 17 in the axial direction A. To deposit the thus interchangeably mounted clamping group 6, the procedure can essentially be reversed, so that subsequently another clamping group 6 can be picked up from another storage device 17 by means of the clamping mandrel 2.

[0133] In the embodiments according to the Fig. 4 and 5 , 8 as well as 9 to 16Method V can be specified as follows: First, the clamping mandrel 2 is positioned counter to the axial direction A on the storage device 17 loaded with clamping jaws 7 for the replaceable assembly of the clamping group 6. The control element 4 is then adjusted in the axial direction A in order to adjust the adjusting elements 5 radially outwards. When the adjusting elements 5 then come into contact with the clamping jaws 7 of the clamping group 6 on the storage device 17, the clamping jaws 7 are detachably fastened to the adjusting elements 5. The clamping mandrel 2, together with the clamping group 6 replaceably mounted thereon, is then removed from the storage device 17 in the axial direction A. The procedure for changing the clamping group can essentially be reversed.

[0134] The Fig. 17 , 21 and 22can be understood as successive snapshots during an unlocking process to release the locking of a respective one of the clamping jaws 7 in the course of a clamping group change according to the method.

[0135] In the snapshot after Fig. 17 the respective clamping jaw 7 is locked to the associated actuating element 5 by means of the locking device 60. From there, the clamping mandrel 2 can be adjusted towards the storage device 17 opposite to the axial direction A in order to press the actuating component 64 in the axial direction A by means of the storage device 17, cf. Fig. 21 , where the locking element 62 is moved into the unlocking position ES by actuating the actuating device 61. The locking of the respective clamping jaw 7 relative to the associated actuating element 5 is according to Fig. 21canceled. Subsequently, in the unlocking position ES, by maintaining the interaction between the storage device 17 and the actuating device 61, the adjusting element 5 assigned to the respective clamping jaw 7 can be adjusted radially inwards by adjusting the control element 4 counter to the axial direction A, cf. Fig. 22 . While the control element 4 and the actuating element 5 are in the position relative to each other according to Fig. 22 held, the clamping mandrel 2 can now be adjusted relative to the respective clamping jaw 7 held by the storage device 17. For example, the clamping mandrel 2 can be adjusted in the axial direction A without the clamping jaw 7 away from the storage device 17, then rotated into a different rotational position with respect to the central axis M and, in this other rotational position, adjusted axially again towards the storage device 17 in order to then initiate the locking of the clamping jaws 7 of another clamping group 6.

[0136] To lock the clamping jaw 7 in question during the clamping group change, proceed in reverse order according to the snapshots after the Figs. 22, 21 and 17 When the adjusting elements 5 are retracted inward along the radial direction R, the clamping mandrel 2 can be adjusted towards the storage device 17 opposite to the axial direction A in order to actuate the actuating devices 61 of the locking devices 60 along the axial direction A. As soon as the actuating devices 61, as in Fig. 22 , are pressed in and the locking element 62 is in its unlocking position ES, the adjusting elements 5 can be extended radially outwards with respect to the radial direction R in order to achieve the state according to Fig. 21to be achieved. The clamping mandrel 2 can then be removed from the storage device 17 in the axial direction A with the adjusting elements 5 extended radially outwards, which automatically releases the actuation of the actuating device 61. When the clamping mandrel 2 is axially removed from the storage device 17, the positioning pins 76 can be in engagement with the positioning bores 76 in order to axially carry the clamping jaw 7 along with it. By releasing the actuating device 61, the locking element 62 is adjusted to its locking position VS in order to Fig. 17 to achieve which the relevant clamping jaw 7 is locked to the associated adjusting element 5 by means of the locking device 60.

Claims

1. A clamping system (1) for an electric motor stator (100) to be coated with impregnation resin, comprising: - a universal clamping mandrel (2) with a housing (3) extending along an axial direction (A) of the clamping system (1), with a control element (4) that is adjustable relative to the housing (3) along the axial direction (A), and with a number of adjusting elements (5) that are radially adjustable relative to the housing (3) by means of the control element (4), and - a clamping group (6) that is designed specifically for the workpiece and can be replaced and mounted on the clamping mandrel (2) and has a number of clamping jaws (7) that can each be radially adjusted by means of one of the adjusting elements (5) for clamping the electric motor stator (100) to be coated, - wherein the clamping group (6) is configured such that all components of the clamping group (6) can be replaced simultaneously during a clamping group change.

2. Clamping system (1) according to claim 1, characterized in that- the control element (4) has a control section (8) which tapers in the axial direction (A) of the clamping system (1) and which has a control contour (9) of the control element (4), - wherein the adjusting elements (5) each have a contact section (10) which taps off the control contour (9) in such a way that an adjustment of the control element (4) in the axial direction (A) is accompanied by a coordinated adjustment of the adjusting elements (5) radially outwards.

3. Clamping system (1) according to claim 2, characterized in that- a respective one of the contact sections (10) taps the control contour (9) at a control contour section (55) of the control contour (9) which is assigned, in particular exclusively, to this contact section (10), - wherein the contact sections (10) and the control contour sections (55) assigned to them are each coupled to one another, in particular positively coupled, in such a way that both an adjustment of the control element (4) in the axial direction (A) is accompanied by a coordinated adjustment of the actuating elements (5) radially outwards and an adjustment of the control element (4) counter to the axial direction (A) is accompanied by a coordinated adjustment of the actuating elements (5) radially inwards, - in particular wherein mutually assigned control contour sections (55) and contact sections (10), in particular T-shaped,have complementary coupling regions (56) and the coupling region (56) of each of the control contour sections (55) is slidably engaged with the coupling region (56) of the contact section (10) associated with this control contour section (55) at an angle to the axial direction (A).

4. Clamping system (1) according to one of the preceding claims, characterized in that- the control element (4) has at least one projection (12) protruding from a control section (8) of the control element (4) in the axial direction (A), in particular one arranged eccentrically, wherein an actuating element (11) of the clamping mandrel (2) can be pressed against the projection (12) counter to the axial direction (A) in order to adjust the control element (4) counter to the axial direction (A), in particular in order to release a feed of the clamping jaws (7), and / or that - an actuating element (11) of the clamping mandrel (2) has at least one projection (12) protruding counter to the axial direction (A), in particular one arranged eccentrically, wherein the projection (12) of the actuating element (11) can be pressed against the control element (4) counter to the axial direction (A) in order to adjust the control element (4) counter to the axial direction (A), in particular in order to release a feed of the clamping jaws (7).

5. Clamping system (1) according to one of the preceding claims, characterized in that- the clamping system (1) has a, in particular automatic, drive device (51) for adjusting the clamping mandrel (2) along and transversely to the axial direction (A) and for rotating the clamping mandrel (2) about a central axis (M) of the clamping system (1), - wherein the clamping system (1) has a, in particular stationary, storage device (17) for, in particular automatically, storage of the replaced and / or to be replaced clamping group (6).

6. Clamping system (1) according to claim 5, characterized in that- the storage device (17) has a number of receiving devices (22) for receiving a clamping jaw (7) in each case along the axial direction (A) and for radially holding received clamping jaws (7), - wherein the receiving devices (22) each have a receiving contour (23) which is designed to be complementary to an outer contour (24) of the respective clamping jaw (7) to be received, - in particular wherein the number of receiving devices (22) is a single or multiple of the number of adjusting elements (5) and / or the number of radially adjustable clamping jaws (7).

7. Clamping system (1) according to claim 5 or 6, characterized in that- Storage device (17) has positioning projections (78) which each project in the axial direction (A) and which are arranged at a distance from one another, in particular equidistant, along a circumferential direction (U) of the clamping system (1), - wherein the positioning projections (78) are arranged and designed to define at least two rotational positions of the clamping mandrel (2) relative to the storage device (17), which rotational positions are rotated relative to one another with respect to a central axis (M) of the clamping system (1), - in particular wherein an exchangeable positioning element (79) of the storage device (17), in particular one which is essentially pie-shaped and / or has an essentially triangular cross-section with respect to the axial direction (A), is detachably fastened to the positioning projections (78).

8. Clamping system (1) according to one of the preceding claims, characterized in that- the clamping system (1) comprises a number of locking devices (60), each for releasably locking one of the clamping jaws (7) to one of the adjusting elements (5) of the clamping mandrel (2) assigned to this clamping jaw (7) or to one of the jaw carriers (14) of the clamping group (6) assigned to this clamping jaw (7), - wherein the locking devices (60) each comprise an actuating device (61), - wherein the actuating device (61) is self-resetting in the axial direction (A) in order to release the locking, - in particular wherein the actuating devices (61) and a, in particular ring-shaped, storage device (17) of the clamping system (1) are coordinated with one another in such a way that the actuating devices (61) can be actuated in a contact-like manner, in particular simultaneously, by means of an axial stop section (80) of the storage device (17), in that the clamping mandrel (2) is moved counter to the axial direction (A) towards the storage device (17). becomes.

9. Clamping system (1) according to claim 8, characterized in that- a respective one of the locking devices (60) has a locking element (62) and an engagement structure (63), - wherein the locking element (62) is adjustable relative to the engagement structure (63) between a locking position (VS) and an unlocking position (ES), - wherein the locking element (62) engages in the engagement structure (63) in the locking position (VS) to produce a radially, in particular radially inwardly effective positive locking (FS) in order to releasably lock the respective clamping jaw (7) to the actuating element (5) assigned to this clamping jaw (7) or to the jaw carrier (14) assigned to this clamping jaw (7), - wherein in the unlocking position (ES) the radially effective positive locking (FS) is canceled, and - wherein the actuating device (61) of the respective locking device (60) has a, in particular pin-shaped, adjustable along the axial direction (A), Actuating component (64) for,in particular self-resetting, adjustment of the locking element (62) from the locking position (VS) to the unlocking position (ES).

10. Clamping system (1) according to claim 8 or 9, characterized in that - a locking element (62) and / or an actuating component (64) of the actuating device (61) is movably mounted on one of the actuating elements (5) assigned to the respective locking device (60) or on one of the respective jaw supports (14), in particular along the axial direction (A), - wherein the engagement structure (63) of the locking device (60) is formed on a radially inwardly open recess (66) of the clamping jaw (7) assigned to the respective actuating element (5) or the respective jaw support (14).

11. Clamping system (1) according to claim 10, characterized in that- wherein the recess (66) is longitudinally extended along a longitudinal direction (VL), in particular parallel to the axial direction (A), - wherein the recess (66) has a first recess region (67) and a second recess region (68), - wherein the first recess region (67) and the second recess region (68) merge into one another along the longitudinal direction (VL), - wherein the engagement structure (63) is present, in particular only, in the second recess region (68), - in particular wherein, for locking, the locking element (62) can be inserted radially into the recess (66) within the first recess region (67) in order to be adjusted starting from the first recess region (67) along the longitudinal direction (VL) into the second recess region (68) and thus to produce the radially outwardly effective positive connection (FS), in particular by hooking.

12. Clamping system (1) according to claim 10 or 11, characterized in that - the recess (66) has a recess edge (69), in particular a circumferential and / or keyhole-shaped recess edge, - wherein the engagement structure (63) has at least one shoulder section (70) of the recess edge (69) projecting transversely to the longitudinal direction (VL), in particular two shoulder sections (70) opposite one another transversely to the longitudinal direction (VL).

13. Clamping system (1) according to claim 12, characterized in that- the locking element (62) has a locking structure (71) designed complementarily to the at least one shoulder section (70) of the recess edge (69), in particular in the form of a groove (72) and / or a mushroom-shaped head section (73), - wherein the at least one shoulder section (70) engages in the locking structure (71) in the locking position (VS) to produce the radially effective positive connection (FS), - in particular wherein the shoulder section (70) has a shoulder surface section (KF) for contacting, in particular slidingly, the locking element (62) inserted radially into the recess (66), and the shoulder surface section (KF) extends with a gradient, in particular at an acute angle (α) relative to the longitudinal direction (VL) and / or relative to the axial direction (A), which inclines the locking element (62) radially contacting the shoulder surface section (KF) into the locking position (VS). urges.

14. Clamping system (1) according to one of the preceding claims, characterized in that - the clamping system (1) has a number of clamping jaw positioning aids (75) which are designed for the positive positioning of a respective one of the clamping jaws (7), in particular with respect to the axial direction (A) and a circumferential direction (U) of the clamping system (1), on the respective one of the adjusting elements (5) of the clamping mandrel (2) assigned to this clamping jaw (7) or on a jaw carrier (14) of the clamping group (6) assigned to this clamping jaw (7), - in particular wherein a respective one of the clamping jaw positioning aids (75) has at least one positioning pin (76) and at least one positioning bore (77) designed to be complementary thereto, which are attached in a coordinated manner either to the mutually assigned clamping jaws (7) and adjusting elements (5) or to the mutually assigned clamping jaws (7) and jaw carriers (14).

15. Method (V) for, in particular automatically, interchangeably mounting the clamping group (6) of a clamping system (1) according to one of the preceding claims on the clamping mandrel (2) of the clamping system (1), comprising the following steps: a) positioning the clamping group (6) interchangeably mounted on the clamping mandrel (2) on a, in particular stationary, storage device (17) of the clamping system (1), in particular by means of a drive device (51) of the clamping system (1) for adjusting the clamping mandrel (2) along and transversely to the axial direction (A) and for rotating the clamping mandrel (2) about a central axis (M) of the clamping system (1); b) adjusting the control element (4) counter to the axial direction (A) and concomitantly coordinated adjustment of the adjusting elements (5) radially inward in order to move the adjusting elements (5) away from the clamping jaws (7) of the clamping group (6) in such a way that the clamping group (6) is stored;c) positioning the clamping mandrel (2) relative to a further deposited clamping group (6) of the clamping system (1), in particular wherein the further deposited clamping group (6) is located on the same deposit device (17) or on a further deposit device (17) of the clamping system (1); d) adjusting the control element (4) in the axial direction (A) and the associated coordinated adjustment of the adjusting elements (5) radially outwards in order to adjust the adjusting elements (5) towards the clamping jaws (7) of the further clamping group (6), in particular in order to attach the adjusting elements (5) directly or indirectly to the clamping jaws (7) of the further clamping group (6); 16. Method (V) according to claim 15, characterized in that according to the method (V) in the course of the clamping group change, the clamping group (6) is replaced by the further clamping group (6), wherein during the clamping group change the clamping mandrel (2) is moved relative to the storage device (17) along the axial direction (A).

Images