Quick clamping devices, insert tools, machine tools and machine tool systems

Abstract

The present invention relates to a quick clamping device for arranging at least one insert tool (10) on a machine tool (12), particularly an angle grinder, having at least one output unit (14) for moving the insert tool (10) about an output axis (16) of the output unit (14) and having at least one fastening unit (20) having a fastening element (18) mounted, particularly non-removably, on the output unit (14), for at least axially fastening the insert tool (10) to the output unit (14). It is proposed that the quick clamping device has at least one fixing unit (22) having at least one fixing element (24) supported, particularly movably, the fixing element configured to fix the fastening element (18), which is movably supported relative to the output unit (14) at least about the output axis (16), such that the fastening element (18) cannot move about the output axis (16).

Description

[0001] This application is a divisional application of application No. 201880052074.6 (International Application No. PCT / EP2018 / 070744), filed on July 31, 2018, entitled "Quick clamping device, insert tool, machine tool and machine tool system". Technical Field

[0002] This application relates to a quick clamping device, an insert tool, a machine tool, and a machine tool system. Background Technology

[0003] A quick clamping device for arranging at least one insert tool on a machine tool is known from DE 10361810 A1, wherein the quick clamping device includes at least one output unit for moving the insert tool about the output axis of the output unit, and includes at least one fastening unit having at least one movably supported fastening element for at least axially fastening the insert tool to the output unit. Summary of the Invention

[0004] The present invention relates to a quick clamping device for arranging at least one insert tool, particularly in a tool-free manner, on a machine tool, especially an angle grinder, the quick clamping device having at least one output unit for moving the insert tool about the output axis of the output unit, and having at least one fastening unit having at least one fastening element that is mounted on the output unit in a movable manner, particularly in a non-removable manner, for at least axially fastening the insert tool to the output unit.

[0005] It is proposed that the quick clamping device has at least one fixing unit having at least one fixing element that is particularly movably supported, the fixing element being configured to fix the fastening element that is movably supported relative to the output unit at least about the output axis, especially in at least one operating state, preferably in an open state, such that the fastening element cannot move about the output axis.

[0006] This design offers a high degree of ease of operation. Preferably, it allows for simple assembly and / or disassembly of insert tools on the machine tool, thereby saving time, particularly when changing insert tools and / or preparing the machine tool for operation. The described configuration advantageously fixes the open state of the quick-clamping device in a way that prevents it from closing automatically and / or accidentally, thereby significantly improving efficiency and / or operator friendliness, for example, by enabling the insertion tool to be clamped directly, especially without reopening the quick-clamping device. Advantageously, the quick-clamping device has only a few parts, thus keeping production costs particularly low.

[0007] Preferably, the output unit is configured to transmit rotational and / or oscillating motion about the output axis to an insert tool fastened to the output unit by means of a fastening unit. Preferably, the output unit is operatively connected to the machine tool's drive unit in a manner known to those skilled in the art, particularly via at least one drive pinion of the drive unit. The output unit particularly includes at least one sleeve and / or at least one hollow shaft, particularly a hollow spindle. The rotational and / or oscillating motion of the output unit is preferably generated by the combined action of the machine tool's output unit and drive unit, which includes at least one electric motor. The phrase "cannot be removed from assembly" should be understood in particular as: the component, particularly the fastening element, is arranged in a way that prevents loss on at least one other component, particularly the output unit, and / or preferably cannot be separated from the output unit in an operational and / or ready-to-operate state, particularly in the open state of the quick-clamping device and in the closed state of the quick-clamping device. Preferably, the fastening element is arranged in a way that prevents loss on the output unit. In particular, fastening elements and / or each additional component arranged on the output unit in a loss-proof manner are connected to the output unit in a loss-proof manner, especially in the open and / or closed states of the quick-clamping device. The "open state" of the quick-clamping device should be understood in particular as a state in which the quick-clamping device is configured to release the insert tool disposed on the quick-clamping device for disassembly and / or to release the quick-clamping device for assembling the insert tool on the quick-clamping device. The "closed state" of the quick-clamping device should be understood in particular as a state in which the insert tool is ready to be fastened to the output unit and / or in which the insert tool cannot be removed from the output unit, especially without damage. The fastening elements, especially in the closed state of the quick-clamping device, are configured to generate force-locking and / or form-locking to retain the insert tool, especially the grinding disc, on the quick-clamping device. Preferably, the fastening elements generate, preferably by means of pressing at least a portion of the insert tool against at least a portion of the output unit, form-locking, especially axial form-locking. It is conceivable that, particularly in addition to axial shape-locking, the fastening element also produces shape-locking in the radial and / or circumferential directions, wherein the circumferential direction lies in a plane whose surface normal extends parallel to the output axis. "Tool-free fastening" should be understood in particular as the arrangement of insert tools on the quick-clamping device and / or the switching between open and closed states being achieved without the use of external tools, such as wrenches, Allen wrenches, etc. The fastening element is particularly movably supported relative to the output unit by means of axial translation and / or rotation about the output axis, wherein the axis of motion, particularly the axis of rotation, of the fastening element preferably coincides at least substantially with the output axis.The output unit at least partially surrounds the fastening element, particularly along a circumferential direction, which lies in a plane whose surface normal extends at least substantially parallel to the output axis. The output unit preferably includes a hollow shaft for at least partially receiving the fastening element. The fixing unit particularly has at least one, preferably at least two, advantageously at least three, preferably at least four, or particularly preferably at least a plurality of fixing elements. In particular, the fixing elements, especially in the open state, are configured to form at least one form-locking engagement with the fastening element, particularly for securing the fastening element in the open state. Preferably, the fixing elements autonomously move to a fixed position after the quick-clamping device is opened to secure the fastening element, particularly to the point that it cannot be twisted to and / or returned to the closed state. The autonomous movement of the fixing elements can be achieved, in particular, by means of, the restoring force of a spring, and / or by means of a force generated in a motor-like manner, for example by an actuator of the fixing unit. It is conceivable that the fixing element is constructed as a movable support pin, which can be constructed, in particular, circular, polygonal, and / or flat, and constructed as a foldable hinge, hook, permanent magnet, or electromagnet. "Set up" should be understood in particular as specifically programmed, designed, and / or configured. An object is set up for a specific function, which should be understood in particular as the object satisfying and / or performing that specific function in at least one application state and / or operating state. In particular, such quick-clamping devices can be advantageously implemented compactly, thereby enabling the assembly of smaller insert tools, such as insert tools with a diameter of 100 mm or less.

[0008] It is also proposed that the fixing element has at least one contact surface, particularly the contact surface of the axial extension of the fixing element, which is configured to abut against the fastening element. This advantageously achieves good fixation of the fastening element, particularly ensuring it cannot be twisted away from the open state. It advantageously achieves higher safety, particularly higher operational safety, thereby preventing injury during operation. Furthermore, reliable form-locking to retain the fastening unit can be advantageously achieved by means of this contact surface. This contact surface can be constructed, in particular, at least partially flat and / or curved. When the fastening element is fixed by the fixing element, the force applied by the fastening element acts, in particular, at least substantially perpendicularly, on this contact surface. Furthermore, it is conceivable that the fastening element has a corresponding contact surface, which in particular has an external shape that is at least substantially opposite to and / or at least partially embedded in the contact surface. Preferably, the contact surface forms a form-locking with the fastening element, particularly with the contact surface of the fastening element. The fixing element preferably has another contact surface configured to abut against the insert tool in the closed state of the quick-clamping device and / or during the closing process. Preferably, the other contact surface is arranged offset from the surface of the fastening element facing away from the machine tool when the fixing element is fully extended and / or when the quick-clamping device is open. In particular, viewed in a direction parallel to the output axis facing away from the machine tool, the other contact surface is arranged in front of the surface of the fastening element facing away from the machine tool. The distance between the surface of the fastening element facing away from the machine tool and the other contact surface is at least 1 mm, preferably at least 3 mm. This advantageously allows for a mating shape that enables simple and precise orientation of the insert tool during assembly.

[0009] Furthermore, it is proposed that the fixing element is movably supported on at least one output element of the output unit, particularly in a slot defined by the output element. Advantageously, a high degree of ease of operation can be achieved. In particular, the fixing element can be advantageously prevented from being lost by supporting it on another component of the quick-clamping device. In particular, the movable support allows for easy activation and / or deactivation of the fixing element. Such support of the fixing element can advantageously achieve a compact structural configuration. The fixing element is particularly non-removably mounted on the output element and / or arranged on the output element in a loss-proof manner. The fixing element is particularly movable in one, preferably two, or preferably three spatial directions, wherein, in particular, at least one spatial direction or at least one of these spatial directions extends at least substantially parallel to the output axis. In particular, the fixing element is arranged in the lower portion of the output unit facing the tool receiving section of the quick-clamping device, viewed along the output axis. The slot defined by the output element can particularly be constructed as a sleeve, hole, or circular and / or polygonal tube, which is preferably integrally connected to the output element. This advantageously allows the force applied to the stationary element to be transferred to the stable output element, thereby achieving high stability. In particular, the stationary element can at least partially retract and extend from the slot. "One-piece" should be understood in particular as a material-locking connection, for example by welding, bonding, injection molding and / or other processes that are meaningful to those skilled in the art, and / or advantageously as molded into a single part, for example by casting and / or by injection molding with a single or multi-component method and advantageously by a single blank.

[0010] Furthermore, it is proposed that the fixing unit has at least one fixing spring, which pre-tightens the fixing element with spring force in the direction of the fixing element's fixed position. Advantageously, simple operability can be achieved, especially in that the fixing element can autonomously occupy the fixed position after being adjusted to the open state of the quick-clamping device. Furthermore, it is advantageous, especially by the restoring force of the fixing spring, to prevent accidental release of the fixing element. The spring force of the fixing spring is oriented, at least partially, in a direction at least substantially parallel to the output axis. The fixing spring is particularly configured to autonomously offset the fixing element into a locked position, which is configured to lock the fastening element so as to prevent torsion. The fixing spring can be constructed, in particular, as a bending spring, a torsion spring, preferably a compression spring and / or a tension spring, an air spring and / or a disc spring.

[0011] Furthermore, it is proposed that the fastening unit has at least one clamping spring that generates a clamping force in at least one operating state, which, through transmission via the fastening element, causes a pressing force acting on the fixed element. This allows for particularly advantageous force transmission. Advantageously, the force consumption required to open and close the quick-clamping device can be optimized, particularly by means of the clamping spring advantageously storing the force consumed during opening until the closing process. Furthermore, an autonomous closing process can be advantageously achieved. Higher operator friendliness and / or simple operability can be advantageously achieved. The clamping spring can be configured, in particular, as a bending spring, torsion spring, preferably a compression spring and / or a tension spring, an air spring and / or a disc spring. In particular, the fastening element directly, preferably without intermediate connecting elements, transmits the clamping force of the clamping spring to the fixed element as the pressing force of the fastening element. In particular, the clamping spring is at least partially arranged inside the fastening unit, particularly the fastening element. The phrase "at least partially arranged inside the fastening element" should be understood in particular to mean that the fastening element surrounds the clamping spring at least 50%, preferably at least 70%, or preferably at least 90% in the circumferential direction, which extends in a plane whose surface normal extends parallel to the output axis. Preferably, the clamping spring transmits another clamping force indirectly, particularly via a cam drive mechanism of a quick-clamping device, to the fastening element. In particular, the longitudinal force of the clamping spring here generates torque, especially via the cam drive mechanism. The cam drive mechanism advantageously converts the torque, particularly via a thread, into a clamping force in the axial direction. Thus, it is advantageous to allow the fastening element to move, particularly simultaneously, in the axial direction, relative to the output element while it is twisting relative to the output unit about the output axis.

[0012] It is also proposed that the maximum possible axial offset of the fastening element from the position where it can be fastened by the fixing element is at most 10 mm, advantageously at most 6 mm, preferably at most 2 mm, more preferably at most 1 mm, or particularly preferably at most 0.4 mm. This advantageously improves flexibility, particularly by enabling the clamping of multiple different insert tools of varying thicknesses into the quick-clamping device. A compact configuration of the quick-clamping device can be advantageously achieved. Furthermore, the fastening element's anti-loss capability can be advantageously achieved, particularly by determining the maximum possible offset of the fastening element within the quick-clamping device. Additionally, the minimum axial positional difference between the open and closed states of the fastening element, especially the portion of the fastening element terminating in the axial direction, is at least 0.15 mm, preferably at least 0.5 mm, or more preferably at least 1.0 mm.

[0013] Furthermore, it is proposed that the quick-clamping device has a cam drive mechanism configured to move the fastening element back and forth between at least two end positions, one of which is a position that can be fastened by a fixing unit. This allows for particularly advantageous force transmission and / or force conversion. Advantageously, operator friendliness can be improved, especially by converting simple operator hand operations, such as pressing a button and / or adjusting a lever, into more complex movements of the fastening element, such as rotational movements. In particular, the cam drive mechanism is configured to at least partially convert the linear motion of the unlocking pin of the quick-clamping device into rotational motion of the fastening element. "End position" should be understood in particular as the position in the open state and / or the position in the closed state. "Position that can be fastened by a fixing unit" should be understood in particular as the position in the open state. Preferably, the "cam drive mechanism" is configured to convert linear motion into a motion at least partially different from linear motion, such as rotational motion, or to convert a motion at least partially different from linear motion into linear motion.

[0014] Furthermore, it is proposed that the quick-clamping device has at least one cam drive mechanism, wherein the output element has a slot that constitutes the cam drive element of the cam drive mechanism, and is particularly configured to have a trajectory curve that is angled relative to the output axis. This allows for particularly advantageous force transmission and / or force conversion. With the aid of such a cam drive mechanism, the member can be advantageously forced to move relative to the output unit. "Cam drive element" should be understood in particular as a component of the cam drive mechanism that at least directly contributes to the force conversion and / or force transmission via the cam drive mechanism. The trajectory curve of the cam drive element can, in particular, have a straight direction, a simply angled direction, a multi-bend direction, a helical direction, or other directions.

[0015] Furthermore, it is proposed that the quick-clamping device has at least one cam drive mechanism with at least one, particularly additional, cam drive element, which is at least partially arranged inside the fastening element, particularly capable of linear and / or rotational motion. This allows for advantageous force transmission and / or force conversion. Furthermore, a compact structural configuration can be advantageously achieved. In particular, the additional cam drive element is configured to be at least partially engaged with a cam drive element different from the additional cam drive element. In particular, the interaction between the additional cam drive element and the cam drive element different from the additional cam drive element causes the two components having the cam drive element to rotate relative to each other. The phrase "at least partially arranged inside the fastening element" should be understood to mean that the fastening element surrounds the additional cam drive element at least up to 50%, preferably at least up to 70%, or preferably at least up to 90% in the circumferential direction, which extends in a plane whose surface normal extends parallel to the output axis.

[0016] Furthermore, it is proposed that the output unit has at least one torque transmission element, which is constructed to at least substantially overlap with the fastening element, particularly with the locking member of the fastening element, in at least one position of the fastening element, especially in the open position constituting the quick-clamping device. Advantageously, particularly through a large shape-locking cover, good force transmission, especially torque transmission, can be achieved from the output unit to the insertion tool. Furthermore, simple assembly of the insertion tool in the quick-clamping device can be advantageously achieved, particularly by allowing the insertion tool to move well through at least a portion of the fastening element during assembly. Furthermore, simple visual differentiation between the closed and open states of the quick-clamping device can be advantageously achieved, particularly by the overlap present in the open state, which is absent in the closed state. The torque transmission element particularly has at least partially a star-shaped, cross-shaped, polygonal, elliptical shape or outer contour and / or other non-rotationally symmetric geometry. The "locking element" should be understood in particular as part of a fastening element, configured to generate a form-locking engagement for retaining the insert tool in at least one operating state, preferably by means of a hub that at least partially covers the insert tool and the torque transmission element. Therefore, larger axial forces and / or torques can be advantageously transmitted, thereby enabling particularly reliable reception and / or reliable operation of insert tools with larger diameters, for example up to 230 mm, particularly in the range of 150 mm to 230 mm, or preferably larger than 230 mm. In particular, the locking element is constructed as a single piece with the fastening element. The locking element, in particular, has at least partially a star-shaped, cross-shaped, polygonal, elliptical shape or outer contour and / or other non-rotationally symmetric geometry.

[0017] It is also proposed that the fastening unit, especially the fastening element, has at least one thread, which is constructed as a trapezoidal thread or a sawtooth thread. This advantageously keeps friction during movement low. Furthermore, it particularly enables advantageous guidance of movement, especially rotational and translational movement between at least two end positions of the fastening element. Especially when used to form-lockingly hold an insert tool in a quick-clamping device, the thread advantageously generates a frictional lock for holding the insert tool in the quick-clamping device in the closed state. Advantageously, it can prevent the formation of mating rust, especially between the output element, the fastening element, and / or the insert tool. The thread particularly has a lead of at least 1 mm, preferably 2 mm, advantageously 3 mm, preferably 4 mm, or particularly preferably 6 mm. When the fastening element moves between the two end positions, it rotates particularly at least one-twelfth, preferably at least one-tenth, advantageously at least one-eighth, preferably at least one-quarter, or particularly preferably at least half a full rotation. The thread is particularly constructed as an external thread. The output element particularly has a thread corresponding to this thread, which is particularly constructed as an internal thread. The threads of the output element are particularly integrally constructed with the output element. The threads of the fastening element are particularly integrally constructed with the fastening element.

[0018] Furthermore, an insert tool, particularly a grinding disc, is proposed, having at least one attachment device constructed to correspond substantially to the contour of the fastening element and / or torque transmission element of a quick-clamping device. This advantageously achieves high operability. Preferably, simple assembly and / or disassembly of the insert tool on the machine tool is possible, thereby advantageously saving time, particularly when changing the insert tool and / or during machine tool preparation for operation. Good force transmission, particularly good torque reception via the insert tool, is advantageously achieved. The insert tool can be constructed, in particular, as a grinding disc, saw blade, grinding plate, fan wheel, grinding wheel, coarse grinding wheel, burr wheel, and / or brush. The attachment device is particularly constructed as a preferred through and / or centered slot of the insert tool. The inner contour of the insert tool corresponds particularly to the outer contour of the torque transmission element and / or fastening element.

[0019] Furthermore, a machine tool, particularly an angle grinder, is proposed, which has at least one quick-clamping device according to the invention. This advantageously achieves a high degree of ease of operation. Preferably, it enables simple assembly and / or disassembly of insert tools on the machine tool, thereby advantageously saving time, especially when changing insert tools and / or during machine tool preparation for operation.

[0020] Furthermore, a machine tool system is proposed, comprising at least one machine tool, particularly an angle grinder, and at least one insert tool, wherein the machine tool, particularly the angle grinder, has at least one quick-clamping device. This advantageously achieves a high degree of ease of operation. Preferably, the insert tool can be easily assembled and / or disassembled on the machine tool, thereby advantageously saving time, especially when changing the insert tool and / or during machine tool setup.

[0021] The quick-clamping device according to the invention, the machine tool according to the invention, the insert tool according to the invention, and / or the machine tool system according to the invention should not be limited to the above-described applications and embodiments. In order to achieve the functions described herein, the quick-clamping device according to the invention, the machine tool according to the invention, the insert tool according to the invention, and / or the machine tool system according to the invention may have a quantity different from the number of individual elements, components, and units mentioned herein. Attached Figure Description

[0022] Further advantages are derived from the following description of the accompanying drawings. Embodiments of the invention are illustrated in the drawings. The drawings, description, and claims comprise combinations of multiple features. Those skilled in the art can also consider these features individually and generalize them into meaningful further combinations.

[0023] The attached diagram shows:

[0024] Figure 1 A schematic diagram of a machine tool system with an insert tool and a machine tool itself, the machine tool having a quick clamping device.

[0025] Figure 2 A schematic diagram of the cross-section of a machine tool and a quick-clamping device.

[0026] Figure 3 A schematic 3D view of the quick-clamping device in the open state and

[0027] Figure 4 A schematic bottom view of the quick clamping device in the closed state with the insert tool. Detailed Implementation

[0028] Figure 1 A machine tool system is shown, comprising a machine tool 12 and a insert tool 10, the machine tool having a housing 78. The machine tool 12 is configured as an angle grinder. The insert tool 10 is configured as a grinding disc. The insert tool 10 has an attachment device 46 (see...). Figure 4 The attachment device 46 is constructed as a continuous slot 50.

[0029] Machine tool 12 has a quick-clamping device. This quick-clamping device is configured to hold at least one insert tool 10 on machine tool 12. Machine tool 12 has an operating device 52 for opening and closing the quick-clamping device. The operating device 52 is constructed as a pull rod 54. The pull rod 54 has an eccentric member 74. The operating device 52, particularly by means of the eccentric member 74, is configured to engage the unlocking pin 76 of the quick-clamping device (see...). Figure 2 The device moves in the axial direction. The unlocking pin 76 is configured to unlock the quick-clamping device when it moves into the housing 78 of the machine tool 12. When the quick-clamping device is locked, the unlocking pin 76 moves away from the housing 78 of the machine tool 12. Figure 1 The manipulator 52 shown is in the off state. The machine tool 12 has a drive unit 56. The drive unit 56 is configured to provide motion energy for moving, particularly rotating, the insert tool 10. The drive unit 56 is arranged in the housing 78.

[0030] exist Figure 2 The image shows a mid-section of the quick-clamping device. The quick-clamping device has an output unit 14. The output unit 14 is configured to move the insert tool 10 about its output axis 16. The output unit 14 has an output element 28. The output element 28 is constructed as a cylindrical hollow shaft. The output element 28 is centrally arranged about the output axis 16.

[0031] Machine tool 12 has a force transmission element 58 for transmitting, and in particular receiving, the force generated by drive unit 56. Force transmission element 58 is configured as a disc gear 60. Disc gear 60 is force-locked connected to output element 28. Disc gear 60 is connected to drive unit 56 by means familiar to those skilled in the art, such as a drive pinion and drive shaft (not shown). Disc gear 60 can be rotated by drive unit 56.

[0032] The quick-clamping device has a fastening unit 20. The fastening unit 20 is configured to axially fasten the insert tool 10 to the output unit 14. The fastening unit 20 has a fastening element 18. The fastening element 18 is arranged on the output unit 14, particularly the output element 28, in a way that prevents loss, and / or is mounted on the output unit 14, particularly the output element 28, in a way that prevents removal. The fastening element 18 has a locking member 66. The locking member 66 is constructed as a single piece with the fastening element 18. Viewed along the output axis 16, the locking member 66 is arranged on the underside opposite to the output unit 14. The locking member 66 has a profile 48 in the form of an angled cross. The locking member 66 is configured to create a form-locking engagement to hold the insert tool 10 between the output element 28 and the locking member 66.

[0033] The fastening unit 20, and particularly the fastening element 18, has a thread 44. The thread 44 of the fastening unit 20 is constructed as a trapezoidal thread or a sawtooth thread. The thread 44 of the fastening unit 20 and the fastening element 18 are constructed as a single piece. The thread 44 of the fastening unit 20 is an external thread. The output unit 14 has another thread 92. The other thread 92 and the output element 28 are constructed as a single piece. The other thread 92 is an internal thread. The other thread 92 is constructed as a trapezoidal thread or a sawtooth thread. The thread 44 of the fastening unit 20 corresponds to the other thread 92.

[0034] The fastening element 18 is movably supported. The fastening element 18 is movably supported relative to the output unit 14 about the drive axis 16. The fastening element 18 is movably supported relative to the output unit 14 in the direction of the output axis 16. The quick-clamping device has a fixing unit 22. The fixing unit 22 has two fixing elements 24. The maximum possible axial offset of the fastening element 18 from the position where it can be fastened by the fixing elements 24 is at most 10 mm. The maximum possible axial offset of the fastening element 18 is predetermined by the lead of the thread 44 and / or the lead of another thread 92. The fixing elements 24 are movably supported. The fixing elements 24 are configured to fix the fastening element 18 so that the fastening element 18 cannot move about the output axis 16. When the fastening element 18 is fixed by the fixing elements 24, the fixing elements 24 prevent the fastening element 18 from rotating by form locking.

[0035] The fixing element 24 has a contact surface 26. The contact surface 26 is configured to abut against the fastening element 18. The fixing element 24 has an axial extension 70. The contact surface 26 is arranged on the axial extension 70. The fixing element 24 has another contact plane 96. The other contact surface 96 is configured to abut against the insert tool 10 in at least one operating state.

[0036] The fixing element 24 is movably supported on the output element 28 of the output unit 14. The fixing element 24 is supported within a sleeve 72 defined by the drive element 28. The fixing element 24 is supported in a manner that allows it to retract into and extend from the sleeve 72. The sleeve 72 and the output element 28 are constructed as a single piece. The fixing unit 22 has at least one fixing spring 30. Each fixing element 24 of the fixing unit 22 has a fixing spring 30. The fixing spring 30 preloads the fixing element 24 with spring force toward its fixed position. Figure 2 The retaining spring 30 shown is in a clamped state. With the help of the retaining spring 30, the retaining element 24 moves away from the sleeve 72 without being stopped by the fastening element 18.

[0037] The fastening unit 20 has a clamping spring 32. The fastening unit 20, and especially the fastening element 18, surrounds the clamping spring 32. The clamping spring 32 is arranged inside the fastening unit 20, and especially the fastening element 18. The clamping spring 32 is constructed as a compression spring. Figure 2 The clamping spring 32 is shown in the unloaded state. The clamping spring 32 is in at least one operating state (see...). Figure 3 The clamping force is generated by the fastening element 18, which causes a pressing force acting on the contact surface 26 of the fixing element 24 by means of transmission via the fastening element 18. The fixing element 24 prevents the clamping spring 32 from being unloaded in at least one operating state by the fixing element impeding the rotation of the fastening element 18.

[0038] The quick-clamping device has a cam drive mechanism 34. The cam drive mechanism 34 is configured to move the fastening element 18 back and forth between at least two end positions, one of which is a position that can be fastened by the fixing unit 22. The cam drive mechanism 34 has a plurality of cam drive elements 38, 40, 82.

[0039] Output unit 14 has a cam drive element 38. The cam drive element 38 of output unit 14 is configured as a slot 36 in output element 28. The cam drive element 38 of output unit 14 is configured to have a trajectory curve 80 having an angle relative to the output axis 16. Fastening unit 20 has a cam drive element 82. The cam drive element 82 of fastening unit 20 is configured as a slot 84 in fastening element 18. The cam drive element 82 of fastening unit 20 forms a trajectory curve 86 having a direction parallel to the output axis 16. The cam drive element 40 of cam drive mechanism 34, different from the cam drive elements 38 and 82 of output unit 14 and fastening unit 20, is configured as a movable cam drive element 88. The cam drive element 40 of cam drive mechanism 34, especially the movable cam drive element 88, is at least partially arranged inside fastening element 18. The cam drive element 40 of cam drive mechanism 34, especially the movable cam drive element 88, is arranged axially movable. The cam drive element 40, and particularly the movable cam drive element 88, of the cam drive mechanism 34 are arranged rotatably. The cam drive element 40, and particularly the movable cam drive element 88, of the cam drive mechanism 34 are at least partially engaged with the cam drive element 38 of the output unit 14 and / or the cam drive element 82 of the fastening unit 20. The cam drive element 40, and particularly the movable cam drive element 88, of the cam drive mechanism 34 have a contact surface 90 configured to abut against the unlocking pin 76 in at least one operating state.

[0040] The unlocking pin 76 is pressed into the housing 78 of the machine tool 12, causing axial displacement of the cam drive element 40 of the cam drive mechanism 34, particularly the movable cam drive element 88. Through the engagement contact between the movable cam drive element 88 and the cam drive element 38 of the output unit 14, the movable cam drive element 88 follows an angled trajectory curve 80 of the cam drive element 38 of the output unit 14, causing rotational movement of the movable cam drive element 88. The rotational movement of the movable cam drive element 88, engaged in the cam drive element 82 of the fastening unit 20, forces the fastening element 18, arranged between the movable cam drive element 88 and the output unit 14, to rotate.

[0041] The output unit 14 has at least one torque transmission element 42. The torque transmission element 42 is configured to transmit torque from the output unit 14 to the insert tool 10. The torque transmission element 42 is constructed as a single piece with the output element 28. The torque transmission element 42 has an outer contour 68 in the form of an angled cross (see...). Figure 3 The torque transmission element 42 is configured to form a shape lock with the insert tool 10 in the assembled state by means of the outer contour 68.

[0042] The outer contour 68 of the torque transmission element 42 is in at least one position of the fastening element 18 with the fastening element 18, especially the locking member 66 of the fastening element 18 (see...). Figure 3 The torque transmission element 42 is constructed in an overlapping manner. The outer contour 68 of the torque transmission element 42 is constructed in an overlapping manner with the attachment device 46 of the insertion tool 10 in at least one position. The attachment device 46, especially the inner contour 94 of the attachment device 46, is constructed to correspond to the contour 48 of the fastening element, especially the locking element 18 of the quick clamping device.

[0043] The movement of the movable cam drive element 88, particularly when clamped by the clamping spring 32, with a displacement of X, causes a rotation angle α of the fastening element 18. This rotation, particularly by means of the thread 44 and / or another thread 92, causes an axial offset depending on the lead S of the thread 44 and / or the other thread 92. Therefore, this axial offset is α / 360°*S. The ratio of the clamping force of the clamping spring 32 to the clamping force of the fastening element 18 is U = X*360°*S / α. Thus, the clamping force of the fastening element 18 is U times the clamping force of the clamping spring 32.

[0044] In the illustrated embodiment, with the maximum offset of the movable cam drive element 88, X = 11 cm, α = 36°, and S = 3 mm. The shift ratio in the illustrated embodiment is U = 37.

Claims

1. A quick clamping device for arranging at least one insert tool (10) on a machine tool (12), comprising: at least one output unit (14) for moving the insert tool (10) about an output axis (16) of the output unit (14); and at least one fastening unit (20) having at least one fastening element (18) movably supported, the fastening unit being at least for axially fastening the insert tool (10) onto the output unit (14), characterized in that, The output unit is configured to transmit rotational and / or oscillating motion about the output axis to an insertable tool fastened to the output unit by means of a fastening unit. The output element (28) of the output unit (14) has a slot (36) configured to have a trajectory curve with an angle relative to the output axis (16). The fastening element (18) of the fastening unit (20) has a slot (84) configured to have a trajectory curve with an angle parallel to the output axis (16). A cam drive element is provided that is axially movable and rotatably movable, and the cam drive element is at least partially embedded in the slot (36) of the output element (28) and the slot (84) of the fastening element (18).

2. The rapid clamping device according to claim 1, characterized in that, The output unit includes at least one sleeve and / or at least one hollow shaft; The fastening element (18) has an external thread, and the output element (28) has an internal thread corresponding to the external thread.

3. The rapid clamping device according to claim 1 or 2, characterized in that, The fastening element is assembled on the output unit in a way that prevents it from being removed or lost.

4. The rapid clamping device according to claim 1 or 2, characterized in that, The fastening element rotates relative to the output unit about the output axis while moving relative to the output element in the axial direction.

5. The rapid clamping device according to claim 1 or 2, characterized in that, At least one fixing unit (22) is provided, the fixing unit having at least one fixing element (24) movably supported, the fixing element being configured to fix the fastening element (18) movably supported relative to the output unit (14) at least about the output axis (16) such that the fastening element (18) cannot move about the output axis (16).

6. The rapid clamping device according to claim 5, characterized in that, The fastening unit (20) has at least one clamping spring (32) that generates a clamping force in at least one operating state, which causes a pressure force acting on the fixing element (24) by means of transmission via the fastening element (18).

7. The rapid clamping device according to claim 5, characterized in that, A cam drive mechanism (34) is provided, which is configured to move the fastening element (18) back and forth between at least two end positions, wherein one of the two end positions is a position that can be fastened by the fixing unit (22).

8. The rapid clamping device according to claim 1 or 2, characterized in that, At least one cam drive mechanism (34) is provided, wherein the slot (36) of the output element (28) constitutes the cam drive element of the cam drive mechanism (34).

9. The rapid clamping device according to claim 1 or 2, characterized in that, The device is provided with at least one cam drive mechanism (34) having at least one additional cam drive element, which is arranged in a movable manner at least partially inside the fastening element (18).

10. The rapid clamping device according to claim 1 or 2, characterized in that, The output unit (14) has at least one torque transmission element (42) which is configured to overlap with the fastening element (18) at at least one position.

11. The rapid clamping device according to claim 1 or 2, characterized in that, The fastening unit (20) has at least one thread (44), which is constructed as a trapezoidal thread or a sawtooth thread.

12. The rapid clamping device according to claim 1 or 2, characterized in that, The machine tool (12) is an angle grinder.

13. An insert tool (10) having at least one attachment device (46) configured to correspond to the outline (48) of a fastening element (18) of a quick clamping device according to any one of claims 1 to 12.

14. The insertable tool (10) according to claim 13, characterized in that, The insertable tool is a grinding disc.

15. A machine tool (12) having at least one quick clamping device according to any one of claims 1 to 12.

16. A machine tool system having at least one machine tool (12) and at least one insert tool (10) according to claim 13, said machine tool having at least one quick clamping device according to any one of claims 1 to 12.

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