TOOL HOLDERS FOR PORTABLE MACHINE TOOLS, IN PARTICULAR ANGLE GRINDERS

Description

State of the art

[0001] Toolholding devices for portable machine tools, in particular angle grinders, are already known, wherein the known toolholding devices comprise at least one output unit comprising at least one rotatably driven output spindle, at least one quick-release clamping unit arranged on the output spindle, comprising at least one torque transmission element non-rotatably connected to the output spindle and at least one locking element, in particular movably mounted axially along an output axis of the output spindle, at least one locking unit for securing the output spindle against rotation, and at least one actuating unit comprising at least one actuating element, in particular movably mounted, by means of which the locking unit can be actuated, in particular by a movement of the actuating element. Further toolholding devices are disclosed in EP 0 319 813 A2 and WO

[0002] 2018 / 036920 A1. The aforementioned document WO 2018 / 036920 A1 discloses the preamble of claim 1. Disclosure of the invention

[0003] The invention relates to a tool holding device for a portable machine tool, in particular for an angle grinder, with at least one output unit comprising at least one rotatably driven output spindle, with at least one quick-release clamping unit arranged on the output spindle, comprising at least one torque transmission element connected to the output spindle, in particular non-rotatably, and at least one locking element movably mounted axially along an output axis of the output spindle, with at least one locking unit for a

[0004] Securing the output spindle against a rotational movement, and with at least one actuating unit which has at least one actuating element, in particular a movable one, by means of which the locking unit can be actuated, in particular as a result of a movement of the actuating element.

[0005] It is proposed that the actuating element be designed to actuate the quick-release clamping unit, particularly the locking element or the torque transmission element, especially as a result of movement of the actuating element. The actuating element is preferably designed as a mechanical actuating element, such as an actuating lever, an actuating push button, an actuating rotary knob, an actuating slide, or the like. The actuating element is preferably movably mounted, in particular pivotably, rotatably, or translationally, on a housing of the portable machine tool. However, it is also conceivable that the actuating element be designed as an electrical or electronic actuating element, such as a push button, a switch, a touch-sensitive actuating sensor, or the like.The actuator is designed to generate an electrical or electronic signal upon actuation, which can be processed by a processing unit of the tool holder or the portable machine tool to control the locking unit and / or the quick-release clamping unit. If the actuator is designed as an electrical or electronic actuator, it is conceivable that actuation of the actuator can be detected and, depending on the detection of the actuation, an electrical signal can be generated that is intended to control one or more actuators, which are intended to move the locking element and / or a locking element of the locking unit. "Intended" is to be understood in particular as being specially configured, specially programmed, specially designed, and / or specially equipped.The phrase "an object is intended for a specific function" means, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state. The design according to the invention advantageously achieves a high level of user comfort, especially since, as a result of actuating the actuating element, two units, in particular the locking unit and the quick-release clamping unit, can be actuated essentially simultaneously. An operator can be advantageously protected from injury, since, during a tool change, it can be advantageously ensured that rotation of the output spindle can be reliably prevented. Simple mounting and / or dismounting of a tool on the tool holder is made possible.Advantageously, components, especially additional actuating elements, can be saved, which can advantageously save installation space or allow existing installation space to be used effectively.

[0006] Preferably, the output unit is designed to drive a tool attached to the quick-release clamping unit, such as a cutting disc or grinding wheel, or the like, in a rotating motion around the output axis. However, it is also conceivable that the output unit is designed to drive the tool attached to the quick-release clamping unit in an oscillating motion around the output axis. Preferably, the output unit is operatively connected to a drive unit of the portable machine tool in a manner known to those skilled in the art, in particular via at least one drive pinion of the drive unit. The rotational or oscillating motion of the output unit, in particular the output spindle and the quick-release clamping unit arranged thereon, is preferably generated by the interaction of the output unit with the drive unit of the portable machine tool, which comprises at least one electric motor or a pneumatic motor.The quick-release clamping unit is preferably rotationally fixed to the output spindle. The rotational or oscillating movement of the output spindle is preferably transmitted via the quick-release clamping unit, in particular by means of the torque transmission element, to the tooling arranged on the quick-release clamping unit. The torque transmission element preferably comprises a plurality of torque transmission extensions, in particular at least two, preferably at least three, and most preferably at least four. The torque transmission extensions are preferably arranged uniformly along a circumferential direction of the quick-release clamping unit, in particular according to n-fold symmetry. However, it is also conceivable that the torque transmission extensions are arranged unevenly along the circumferential direction. The circumferential direction preferably extends in a plane that is at least substantially perpendicular to the output axis.The term "essentially perpendicular" is intended to define, in particular, an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, especially when viewed in a projection plane, enclose an angle of 90° and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°. The torque transmission extensions are preferably arranged offset from one another by 180° along the circumferential direction, particularly in the case of two torque transmission extensions, more preferably by 120° in the case of three torque transmission extensions, and most preferably by 90° in the case of four torque transmission extensions. Preferably, the quick-release clamping unit is designed to accommodate small insert tools, for example, insert tools with a maximum diameter of 200 mm or less.

[0007] Preferably, the locking element is arranged on the output spindle in a captive manner. In particular, the locking element arranged on the output spindle in a captive manner and / or any further component arranged on the output spindle in a captive manner, especially in an open and a closed state of the quick-release clamping unit, is permanently connected to the output spindle. An "open state" of the quick-release clamping unit is understood to mean, in particular, a state of the quick-release clamping unit which is designed to release the insert tool arranged on the quick-release clamping unit for disassembly and / or to release the quick-release clamping unit for the installation of the insert tool on the quick-release clamping unit.The term "closed state" of the quick-release clamping unit refers in particular to a state in which a tool insert is functionally fixed to the output unit and / or in which disassembly of a tool insert from the output unit, especially non-destructive disassembly, is prevented. The locking element, particularly in the closed state of the quick-release clamping unit, is designed to create a force-fit and / or positive-locking connection between the tool insert and the quick-release clamping unit. Preferably, the locking element achieves a positive-locking connection, especially an axial one, preferably by clamping at least a portion of the tool insert between at least two components of the quick-release clamping unit.It is conceivable that the locking element, in particular in addition to the axial positive locking, generates a positive locking in the radial direction and / or in the circumferential direction, wherein the circumferential direction lies in a plane whose surface normal runs at least substantially parallel to the output axis. The locking element is movably mounted, particularly in a direction running at least substantially parallel to the output axis, translationally and / or rotationally about the output axis, especially in relation to the output unit. "Substantially parallel" is understood to mean, in particular, an orientation of a direction relative to a reference direction, especially in a plane, wherein the direction has a deviation from the reference direction of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°. Preferably, an axis of movement of the locking element runs coaxially with the output axis.

[0008] Preferably, the quick-release clamping unit comprises at least one spring element for applying a spring force, in particular a spring force acting along the output axis, preferably in the direction of the torque transmission element or in the direction of the locking element, to the locking element or the torque transmission element. Preferably, the spring element is designed as a compression spring, in particular as a coil spring. However, it is also conceivable that the spring element has a different design that would appear advantageous to a person skilled in the art. The spring element preferably bears at one end against the locking element or the torque transmission element. More preferably, the spring element bears at another end against a housing extension of the housing of the portable machine tool or against a bearing element, in particular a rolling bearing, such as a ball bearing or the like, of the output unit.The bearing element is preferably designed to rotatably mount the output spindle in the housing. The spring element is preferably designed to implement an automatic return function for the quick-release clamping unit to the closed position. However, it is also conceivable that the quick-release clamping unit, alternatively or additionally to the spring element, has at least one actuator for implementing an automatic return function.

[0009] The locking unit preferably comprises a locking element that is provided for a positive and / or force-fit connection with the output spindle or with a further locking element of the locking unit, which is in particular rotationally fixed to the output spindle, in at least one state, especially in the open state of the quick-release clamping unit. The locking element is preferably movably mounted along a direction transverse, in particular at least substantially perpendicular, to the output axis, and in particular translationally movably mounted. However, it is also conceivable that the locking element is movably mounted along another direction that would appear sensible to a person skilled in the art.such as being mounted for translational movement along a direction that runs at least substantially parallel to the output axis. The locking element or the further locking element can be formed integrally with the locking element or integrally with the torque transmission element, or it can be formed as a separate component. The locking element or the further locking element is preferably movable as a result of actuation of the actuating element, in particular directly by the actuating element or indirectly by the actuating element. "Integrated" is understood to mean, in particular, at least materially bonded, for example by a welding process, an adhesive bonding process, an injection molding process, and / or another process that would appear appropriate to a person skilled in the art, and / or advantageously formed in one piece.such as by manufacturing in one piece and / or by manufacturing using a single- or multi-component injection molding process, and advantageously from a single blank. In a one-piece design of the locking element with the securing element, the locking element is preferably designed as an axial extension of the securing element, which is arranged in particular on a side of the securing element facing away from the torque transmission element and is designed to engage with the further locking element when the quick-release clamping unit is open. In a one-piece design of the locking element with the torque transmission element, the locking element is preferably designed as an axial extension of the torque transmission element, which is arranged in particular on a side of the torque transmission element facing away from the securing element and is designed toIn the open state of the quick-release clamping unit, the further locking element engages. Preferably, in a one-piece design of the locking element, the further locking element is fixedly arranged in the housing together with the locking element or the torque transmission element, in particular designed as a locking recess into which the locking element, designed as an axial extension, engages to block a rotary movement of the output spindle. However, it is also conceivable that the locking element is designed as a locking recess arranged on the locking element or the torque transmission element, and the further locking element is designed as a locking extension that engages in the locking element as a result of movement of the locking element or the torque transmission element relative to the further locking element. Further,Various configurations and / or arrangements of the locking unit that would appear sensible to a person skilled in the art are also conceivable. It is also conceivable that the tool holding device according to the invention is designed independently of the locking unit in an alternative configuration. In the alternative configuration of the tool holding device according to the invention, particularly in the alternative configuration independent of the locking unit, the tool holding device according to the invention preferably comprises at least one output unit, which includes at least one rotatably driven output spindle, at least one quick-release clamping unit arranged on the output spindle, which includes at least one torque transmission element, in particular one non-rotatably connected to the output spindle, and at least one locking element, in particular one movably mounted axially along an output axis of the output spindle, and at least one actuating unit.which has at least one actuating element, in particular a movable one, by means of which the quick-release clamping unit, in particular the locking element or the torque transmission element, can be actuated, in particular as a result of a movement of the actuating element, preferably in a manner described herein.

[0010] Furthermore, it is proposed that the tool holding device comprise at least one gear unit designed to convert a movement of the actuating element for actuating the locking unit into a movement of the locking element or the torque transmission element, or to convert a movement of the actuating element for actuating the locking element or the torque transmission element into a movement of the locking unit, in particular the locking element. The gear unit preferably comprises at least one gear element that is arranged on the actuating element or at least interacts with the actuating element, in particular bearing against the actuating element. Preferably, the actuating element acts directly on the gear element, or the gear element is arranged on the actuating element. Preferably, a movement of the actuating element can be directly transmitted to the gear element.Preferably, the actuating element is connected to the transmission element in a way that prevents movement. "Restricted movement" is understood to mean, in particular, a connection between at least two components, especially the actuating element and the transmission element, or between two units, in which a movement of one of the components or units can be transmitted, in particular directly, to the other component or unit. If the actuating element is pivotably mounted, the transmission element is preferably connected to the actuating element in a rotationally fixed manner. If the actuating element is mounted in a translationally movable manner, the transmission element is preferably connected to the actuating element at least in terms of movement, and in particular in a way that prevents movement.The transmission unit can have any configuration that a person skilled in the art would consider useful, such as a cam drive, a gear drive, a rack and pinion drive, a linkage drive, or the like. The transmission unit can be designed as a purely mechanical transmission unit or as an actuator-assisted transmission unit. The design according to the invention allows for a simple conversion of operator force into an actuating force. A high level of user comfort can be advantageously achieved, particularly since, as a result of actuating the actuating element, two units, especially the locking unit and the quick-release clamping unit, can be actuated essentially simultaneously, and / or since a small operator force for actuating the actuating element can be advantageously converted into a large force for moving the locking element and / or the safety device.

[0011] Furthermore, it is proposed that the tool holding device comprises at least one gear unit, in particular the one already mentioned, which has at least one gear element, in particular a ramp-shaped one, in particular the gear element already mentioned, designed to convert a translational or rotational movement of the actuating element into a translational movement of the locking element or the torque transmission element, in particular along a direction running at least substantially parallel to the output axis of the output spindle. Preferably, the gear element is designed to displace the locking element or the torque transmission element against the spring force of the spring element along the direction running at least substantially parallel to the output axis of the output spindle, depending on a movement of the actuating element.Preferably, the locking element or the torque transmission element has at least one ramp-shaped section, in particular a circumferential collar, which corresponds to the ramp-shaped gear element. Preferably, the slope of the ramp-shaped gear element and / or the ramp-shaped section of the locking element or the torque transmission element is less than 50°, more preferably less than 40°, and most preferably less than 30°. The ramp-shaped gear element can be formed by an inclined plane or as a helical section. The ramp-shaped gear element can be arranged on the actuating element or on an additional component of the gear unit that interacts with the actuating element. The ramp-shaped gear element can be rotatably or translationally mounted, in particular in the housing of the portable machine tool.As an alternative to the gear element, the actuating unit could include an actuator that moves the locking element or the torque transmission element along a direction at least substantially parallel to the output axis, depending on the actuation of the actuating element. The actuator can be designed as a spindle drive, a piston drive (e.g., hydraulic or pneumatic piston), an electric motor, or the like. The design according to the invention allows for a simple redirection of the direction of movement. This advantageously allows for a high level of user comfort even in confined spaces, particularly since the redirection of the direction of movement makes efficient use of existing installation space. Furthermore, it allows for a simple conversion of operator force into an actuating force.A high level of user comfort can be advantageously achieved, particularly since a small operator force required to actuate the actuator can be advantageously converted into a large force for moving the locking element and / or the safety element. A preferential force distribution of the operator force required to move the safety element and / or the locking element can be advantageously enabled.

[0012] Furthermore, it is proposed that the tool holding device comprises at least one, in particular the previously mentioned, gear unit, which has at least one, in particular a further or the previously mentioned, gear element, which cooperates with a projection arranged on the locking element or on the torque transmission element, in particular the circumferential collar, to move the locking element or the torque transmission element depending on an actuation of the actuating element.It is conceivable that the ramp-shaped gear element, which is connected to the actuating element in a manner that prevents movement, in particular rotation, and that it interacts with the extension arranged on the locking element or the torque transmission element, in particular the circumferential collar, to cause movement of the locking element or the torque transmission element depending on the actuation of the actuating element, wherein the circumferential collar is designed correspondingly to the ramp-shaped gear element.Alternatively, it is conceivable that the gear unit comprises a further gear element which is mounted translationally in the housing of the portable machine tool and is connected to the actuating element via the ramp-shaped gear element. This further gear element interacts with the extension arranged on the locking element or the torque transmission element, in particular the circumferential collar, to move the locking element or the torque transmission element depending on the actuation of the actuating element. The further gear element is preferably designed as a pull rod. Preferably, the further gear element has a drive extension arranged transversely, in particular at least substantially perpendicularly, to a longitudinal axis of the further gear element, which is designed to interact with the extension arranged on the locking element, in particular the circumferential collar.The further transmission element preferably comprises a ramp extension designed to interact with the ramp-shaped transmission element. The ramp extension preferably extends transversely, and in particular at least substantially perpendicularly, to the longitudinal axis of the further transmission element, especially at an end of the further transmission element facing away from the drive extension of the further transmission element. Preferably, the ramp extension comprises at least one ramp-shaped region, in particular a contact surface inclined to the longitudinal axis of the further transmission element. The ramp-shaped region of the ramp extension is preferably configured to correspond with the ramp-shaped transmission element. In particular, the ramp-shaped region of the ramp extension has a gradient corresponding to that of the ramp-shaped transmission element.The design according to the invention advantageously enables reliable movement of the locking element depending on the actuation of the actuating element. A simple design allows for the simple implementation of a motion coupling between the quick-release clamping unit and the locking unit. A high level of user-friendliness can be advantageously achieved even in confined spaces, particularly since the redirection of the movement direction allows for the efficient use of existing installation space. A high level of user-friendliness can thus be advantageously achieved.

[0013] Furthermore, it is proposed that the tool holding device comprises at least one gear unit, in particular the one already mentioned, which has at least one gear element, in particular the additional gear element already mentioned, for moving the locking element or the torque transmission element depending on actuation of the actuating element, wherein the additional gear element, in particular the additional gear element already mentioned, is arranged in at least one operating state without contact with the locking element or the torque transmission element. Preferably, the additional gear element, in particular the additional gear element already mentioned, is arranged in a closed state of the quick-release clamping unit without contact with the locking element or the torque transmission element.In particular, the additional gear element, especially the one already mentioned, is arranged at a distance in the closed state of the quick-release clamping unit along a direction that runs at least substantially parallel to the output axis relative to the locking element, especially relative to the extension of the locking element, or relative to the torque transmission element, especially relative to the extension of the torque transmission element. Preferably, this can be achieved by an offset arrangement of the locking element or the torque transmission element and the additional gear element, especially the one already mentioned, along the direction that runs at least substantially parallel to the output axis, at least in the closed state of the quick-release clamping unit.In the closed state of the quick-release clamping unit, the locking element can be moved by the spring force of the spring element to a maximum position such that a gap exists between the aforementioned further gear element or the aforementioned gear element along the direction running at least substantially parallel to the output axis, particularly between the extension of the locking element and the ramp-shaped gear element or between the extension of the locking element and the extension of the further gear element. By means of the design according to the invention, wear on the locking element and / or the gear unit during rotation of the quick-release clamping unit can advantageously be counteracted during operation of the portable machine tool equipped with the tool holding device.A long service life of the tool holding device can be advantageously achieved.

[0014] Furthermore, it is proposed that the locking element be movable along a direction of movement depending on the actuation of the actuating element. This direction of movement is transverse, and in particular at least substantially perpendicular, to a direction of movement of the locking unit, along which a locking element of the locking unit, in particular the aforementioned one, is movable depending on the actuation of the actuating element. Preferably, the direction of movement of the locking element is at least substantially parallel to the output axis. Preferably, a direction of movement of the locking element, particularly in a configuration of the locking element separate from the locking element, is transverse, and in particular at least substantially perpendicular, to the output axis.However, it is also conceivable that the direction of movement of the locking element and / or the direction of movement of the locking element has a different orientation that would appear sensible to a person skilled in the art. The design according to the invention allows for the advantageous use of existing installation space. A simple mechanical linkage between the quick-release clamping unit and the locking unit can be implemented.

[0015] Furthermore, it is proposed, particularly in at least one embodiment, that the tool holding device comprises at least one gear unit, in particular the aforementioned one, which has at least one gear element, in particular the aforementioned ramp-shaped one, arranged on a locking element of the locking unit, in particular the aforementioned one, and in particular formed integrally with the locking element of the locking unit. The locking element preferably has at least one transverse extension designed to engage in a locking recess of the further locking element, which is in particular non-rotatably connected to the output spindle. The transverse extension, in particular in a mounted state, preferably extends from a base body of the locking element along a direction at least substantially perpendicular to the output axis towards the output spindle.Preferably, the transverse extension extends at least substantially parallel to a principal plane of extension of the base body of the locking element. The principal plane of extension of the base body of the locking element extends, particularly in a mounted state, at least substantially perpendicular to the output axis. The ramp-shaped gear element arranged on the locking element is preferably designed to interact with the ramp extension of the further gear element, in particular to move the locking element along the direction of movement of the locking element, which runs at least substantially parallel to the output axis. The design according to the invention allows for the advantageous use of existing installation space. Costs, assembly effort, and components can be advantageously saved. A simple mechanical coupling between the quick-release clamping unit and the locking unit can be implemented.

[0016] Furthermore, it is proposed that the tool holding device comprises at least one detent unit that secures the actuating element, the quick-release clamping unit, and / or the locking unit in at least one actuated position. The detent unit preferably comprises at least one detent element designed to secure the actuating element in an actuated position by means of a positive and / or non-positive connection. The detent element can act directly on the actuating element or indirectly on the actuating element via one or more interposed components, in particular components of the gear unit, to secure the actuating element in an actuated position by means of a positive and / or non-positive connection. It is also conceivable that the detent element is designed to secure the actuating element in an actuated position by means of a magnetic force.Further embodiments of the locking unit, which would appear sensible to a person skilled in the art, are also conceivable for securing the actuating element in an actuated position. The locking unit is preferably designed, particularly as a result of securing the actuating element in an actuated position, to secure the quick-release clamping unit in the open state and to secure the locking unit in a locked state in which rotational movement of the output spindle is blocked by a positive locking mechanism. A high level of user comfort can be advantageously achieved by means of the embodiment according to the invention. An operator can be advantageously protected from injury, since it can be advantageously ensured that rotation of the output spindle can be reliably prevented during a tool change.

[0017] Furthermore, it is proposed that the tool holding device comprises at least one detent unit that secures the actuating element, the quick-release clamping unit, and / or the locking unit in at least one actuated position, and that the tool holding device comprises at least one gear unit, in particular the one already mentioned, wherein the detent unit is at least partially formed integrally with the gear unit. The phrase "integrally formed with another unit" means, in particular, that the unit and the other unit have at least one common component that is provided for the function of the unit and the other unit. Preferably, the detent element of the detent unit is formed integrally with the ramp-shaped gear element.In particular, the locking element is designed as a flat surface or a recess that directly adjoins the ramp-shaped gear element, especially the inclined plane. Preferably, the locking element or the further gear element, especially the ramp extension, rests against the locking element in a locked state of the actuating element. Preferably, as a result of the spring force of the spring element, the locking element or the further gear element, especially the ramp extension, is pressed against the locking element in a locked state, thereby preventing movement of the locking element or the further gear element and thus of the actuating element. The further gear element, especially the ramp extension, preferably comprises a flattened area, especially a flat surface, which is designed to interact with the locking element.Preferably, the flattened area is arranged between two ramp-shaped areas of the further gear element, in particular the ramp extension. Preferably, the locking element is designed such that the secured position can be released by over-engaging it, particularly by moving the locking element against a locking direction. The design according to the invention advantageously achieves a high level of user comfort. An operator can be advantageously protected from injury, as it can be advantageously ensured that an unintentional snap-back of the actuating element can be reliably prevented. A compact design can be advantageously achieved. Existing installation space can be advantageously utilized.

[0018] Furthermore, it is proposed that the tool holding device, particularly in an alternative embodiment, comprises at least one guide unit designed to guide the movement of the torque transmission element and to limit a maximum path of movement, in particular at least a maximum rotational path, of the torque transmission element relative to the output spindle. Preferably, the guide unit is designed to guide an axial movement of the torque transmission element relative to the output spindle. Alternatively or additionally, the guide unit is preferably designed to guide a rotational movement of the torque transmission element relative to the output spindle, in particular to guide a rotational movement of the torque transmission element around the output spindle.The torque transmission element is rotatable relative to the output spindle, particularly along an angular range of less than 90°, preferably less than 60°, and most preferably more than 15°. Preferably, the torque transmission element is rotatable along the circumferential direction relative to the output spindle. The torque transmission element is preferably axially movable relative to the output spindle along a maximum axial distance of less than 10 mm, preferably less than 5 mm, and most preferably less than 3 mm. The torque transmission element can perform a stepped movement relative to the output spindle by means of the guide unit, such as an axial movement followed by a rotary movement or vice versa, or the torque transmission element can perform a superimposed movement relative to the output spindle by means of the guide unit, such as a superposition of an axial movement and a rotary movement.The torque transmission element is preferably movable relative to the locking element by the guide unit, particularly to allow the quick-release clamping unit to be moved from an open to a closed state or vice versa. The design according to the invention enables easy mounting and / or dismounting of an insert tool on the tool holder. It allows for reliable movement, particularly of the torque transmission element, within predefined limits. Advantageously, it enables reliable and precise positioning of the torque transmission element relative to the locking element, particularly to facilitate easy removal of an insert tool from the quick-release clamping unit or easy insertion of the insert tool into the quick-release clamping unit.

[0019] Furthermore, it is proposed that the guide unit be designed as a cam guide, wherein at least one cam element of the guide unit is arranged, in particular stationary, on the output spindle and at least one further cam element of the guide unit is arranged, in particular stationary, on the torque transmission element. Preferably, the cam element is designed as a bolt that is rotationally fixed to the output spindle. However, it is also conceivable that the cam element has a different design that would appear advantageous to a person skilled in the art, such as a projection, a groove, a web, a thread, or the like. The cam element preferably extends transversely, in particular at least substantially perpendicularly, to the output axis, especially when the cam element is designed as a bolt.Preferably, the cam element extends transversely through the output spindle, in particular at least as far as the locking element or beyond the locking element into the torque transmission element, and especially into the further cam element arranged on the torque transmission element. The cam element can project beyond the output spindle on one, two, or more sides. The locking element is preferably rotationally fixed to the output spindle by means of the cam element. In particular, the locking element is axially secured to the output spindle along the output axis by means of the cam element. The further cam element is preferably designed as a guide groove. Preferably, the cam element engages with the further cam element.Preferably, the guide unit comprises two further cam elements arranged symmetrically on the torque transmission element, each designed as a guide groove. Preferably, the cam element engages with both further cam elements. However, it is also conceivable that the cam element is designed as a guide groove and is inserted into the output spindle, with the further cam element being designed as a bolt that is rotationally fixed to the torque transmission element and extends through the cam element designed as a guide groove. The torque transmission element is preferably rotationally fixed to the output spindle, at least in the closed state of the quick-release clamping unit, by means of an interaction between the cam element and the further cam element.The design according to the invention allows for the simple structural definition of a movement path, particularly of the torque transmission element relative to the output spindle. Reliable movement, especially of the torque transmission element, within predefined limits can be enabled, particularly for transitioning the quick-release clamping unit from the open to the closed state and vice versa. Advantageously, reliable and precise positioning of the torque transmission element relative to the locking element can be achieved, particularly to facilitate the easy removal of a tool from the quick-release clamping unit or the easy insertion of the tool into the quick-release clamping unit.

[0020] Furthermore, it is proposed that the guide unit comprises at least one cam element, in particular the cam element already mentioned, which is arranged stationary on the output spindle and is connected to the torque transmission element to enable its rotation. Preferably, the cam element is positively and / or force-fitted to the torque transmission element to enable its rotation. Preferably, the cam element engages with the further cam element arranged on the torque transmission element and bears against edge regions of the cam element designed as a guide groove to enable its rotation.Preferably, the cam element is provided, at least in a closed state of the quick-release clamping unit, for the rotational engagement of the torque transmission element, in particular for the transmission of torques from the output spindle to the torque transmission element. Using the design according to the invention, rotational engagement of the torque transmission element can be easily implemented, at least in a closed state of the quick-release clamping unit. Furthermore, the guide unit enables movement of the torque transmission element, facilitating a simple transition of the quick-release clamping unit, for example, into an open state. A path of movement, in particular of the torque transmission element relative to the output spindle, can be easily defined by the design.

[0021] Furthermore, it is proposed that the guide unit comprises at least one, and in particular a further, cam element, especially the aforementioned further cam element, which has at least two guide track sections extending transversely to each other, in particular an axially extending guide track section and a circumferential guide track section. The two guide track sections extending transversely to each other are preferably arranged directly adjacent to one another. The axially extending guide track section preferably has a main orientation that runs at least substantially parallel to the output axis. The circumferential guide track section is preferably arranged at an angle relative to the axially extending guide track section, particularly when viewed in a projection plane.Preferably, the circumferential guide track section extends along the circumferential direction with a gradient, particularly similar to a section of a thread. The circumferential guide track section extends along the circumferential direction, particularly over an angular range of less than 90°, preferably less than 70°, and most preferably less than 50°. The guide unit is preferably designed such that the torque transmission element is rotatable over an angular range of, for example, 45° relative to the locking element. Other angular ranges that would be considered useful by a person skilled in the art are also conceivable, which are suitable for transitioning the quick-release clamping unit from a closed to an open state.Preferably, the locking element releases the insertion tool by means of a rotation of the torque transmission element relative to the locking element, particularly along an angular range of 45°. Preferably, the insertion tool is rotatable with the torque transmission element, particularly due to partial areas of a tool hub of the insertion tool bearing against torque transmission extensions of the torque transmission element when the insertion tool is mounted on the quick-release clamping unit. Using the embodiment according to the invention, it is structurally simple to first achieve axial displacement of the torque transmission element and the locking element before a rotational movement occurs to release the insertion tool.It can advantageously enable tool- and / or component-friendly movement of the torque transmission element, in particular with a low tendency to abrasion wear when actuating the quick-release clamping unit.

[0022] Furthermore, a portable machine tool, in particular an angle grinder, with at least one tool holder according to the invention is proposed. Here, a "portable machine tool" is understood to mean, in particular, a machine tool for machining workpieces that can be transported by an operator without the need for a transport vehicle. The portable machine tool has, in particular, a mass that is less than 40 kg, preferably less than 10 kg, and most preferably less than 5 kg. Preferably, the portable machine tool is designed as an angle grinder. However, it is also conceivable that the portable machine tool has another configuration that would appear useful to a person skilled in the art, such as a circular saw, an oscillating machine tool, a grinding machine, or the like.The design according to the invention advantageously achieves a high level of user comfort, particularly since, as a result of actuating the actuating element, two units, especially the locking unit and the quick-release clamping unit, can be actuated essentially simultaneously. An operator can be advantageously protected from injury, since it can be advantageously ensured that rotation of the output spindle is reliably prevented during a tool change. Simple mounting and / or dismounting of a tool on the tool holder is made possible. Components, especially additional actuating elements, can be advantageously eliminated, thereby saving installation space or allowing existing installation space to be used effectively. drawing

[0023] Further advantages become apparent from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention.

[0024] They show: Fig. 1 a schematic view of a portable machine tool according to the invention with a tool holder according to the invention, Fig. 2 a schematic view of the tool holder according to the invention in a housing of the portable machine tool according to the invention that is at least partially disassembled, Fig. 3 a schematic, perspective view of the tool holder according to the invention, Fig. 4 a schematic view of a section through the tool holder according to the invention, Fig. 5 a schematic, perspective view of an alternative tool holder according to the invention, Fig. 6 a schematic view of a section through the alternative tool holder according to the invention, Fig. 7 a schematic view of a ramp-shaped gear element of the alternative tool holder according to the invention formed in one piece with a locking element, Fig.Fig. 8 a schematic view of a further gear element of the alternative tool holding device according to the invention, Fig. 9 a schematic, perspective view of a further alternative tool holding device according to the invention, wherein a quick-release clamping unit of the further alternative tool holding device according to the invention is in an open state, Fig. 10 a schematic, perspective view of the further alternative tool holding device according to the invention, wherein the quick-release clamping unit of the further alternative tool holding device according to the invention is in a closed state, and Fig. 11 a schematic view of a section through the further alternative tool holding device according to the invention. Description of the exemplary implementations

[0025] Figure 1Figure 1 shows a portable machine tool 12a with at least one tool holder 10a. The portable machine tool 12a is designed as an angle grinder, in particular as a battery-powered angle grinder. Alternatively, the portable machine tool 12a has another configuration that would appear useful to a person skilled in the art, such as a grinding machine, a multi-functional machine, a circular saw, or the like. Preferably, the portable machine tool 12a is designed for use with insert tools 54a (see Figure 1). Figure 2 ) with a maximum diameter of less than 200 mm, in particular less than 120 mm. In Figure 1A battery pack that can be arranged on, and in particular in, a housing 52a of the portable machine tool 12a, and in particular in a main handle 56a of the portable machine tool 12a formed by the housing 52a, is not shown. The main handle 56a preferably has a main extension axis that is at least substantially perpendicular to an output axis 22a of an output spindle 16a of an output unit 14a (cf. Figure 2The drive unit 14a is located at least partially within the housing 52a. The portable machine tool 12a comprises a drive unit 58a, which is located within the housing 52a, in particular at least partially within a portion of the housing 52a in which the drive unit 14a is also located. The drive unit 58a preferably has a rotation axis 60a, which runs at least substantially parallel, and in particular coaxially, to the output axis 22a. The drive unit 58a is designed to drive the output unit 14a in a manner known to those skilled in the art. Preferably, the drive unit 58a is designed to directly drive the output spindle 16a. The output spindle 16a can be driven by means of the drive unit 58a to rotate about the output axis 22a of the output spindle 16a.However, it is also conceivable that the output spindle 16a can be driven in an oscillating manner around the output axis 22a by means of the drive unit 58a. The drive unit 58a preferably comprises an electric motor (not shown in detail here). A rotor shaft (not shown in detail here) of the electric motor is preferably connected to the output spindle 16a in a rotationally fixed manner. However, it is also conceivable that the rotor shaft is connected to the output spindle 16a via a belt drive, a gear drive, or the like, for the transmission of drive forces and / or drive torques in a manner already known to a person skilled in the art.

[0026] Figure 2Figure 1 shows a schematic view of the tool holding device 10a in the at least partially disassembled housing 52a of the portable machine tool 12a. The tool holding device 10a for the portable machine tool 12a comprises at least the output unit 14a, which includes at least the rotatably driven output spindle 16a, and at least one quick-release clamping unit 18a arranged on the output spindle 16a, which includes at least one torque transmission element 20a non-rotatably connected to the output spindle 16a (see also Figure 10a). Figures 3 and 4 ) and at least one locking element 24a, which is movably mounted, in particular axially along the output axis 22a of the output spindle 16a (see also Figures 3 and 4 ) includes.

[0027] The quick-release clamping unit 18a is preferably rotationally fixed to the output spindle 16a. A rotational or oscillating movement of the output spindle 16a is preferably transmitted via the quick-release clamping unit 18a, in particular by means of the torque transmission element 20a, to the insert tool 54a arranged on the quick-release clamping unit 18a. The torque transmission element 20a preferably comprises a plurality of torque transmission extensions 66a, 68a (in Figures 2 and 3 (only two torque transmission extensions 66a, 68a are shown), in particular at least two, preferably at least three and particularly preferably at least four. The torque transmission extensions 66a, 68a are preferably arranged uniformly distributed along a circumferential direction 70a of the quick-release clamping unit 18a on the torque transmission element 20a, in particular according to an n-fold symmetry.

[0028] The torque transmission element 20a preferably comprises at least one axial locking extension 72a, 74a, 76a, 78a, in particular at least four axial locking extensions 72a, 74a, 76a, 78a (see also Figure 3The axial locking extensions 72a, 74a, 76a, 78a are preferably arranged uniformly along the circumferential direction 70a of the quick-release clamping unit 18a on the torque transmission element 20a, particularly according to an n-fold symmetry. The axial locking extensions 72a, 74a, 76a, 78a and the torque transmission extensions 66a, 68a are preferably formed integrally. The axial locking extensions 72a, 74a, 76a, 78a, in particular the contact surfaces of the axial locking extensions 72a, 74a, 76a, 78a facing the housing 52a, cooperate to axially clamp the insert tool 54a with the locking element 24a.Preferably, the insert tool 54a, in particular a hub (not shown in detail here) of the insert tool 54a, is arranged axially along a direction running at least substantially parallel to the output axis 22a in a state secured by means of the quick-release clamping unit 18a on the output spindle 16a between the axial locking extensions 72a, 74a, 76a, 78a, in particular between the contact surfaces of the axial locking extensions 72a, 74a, 76a, 78a facing the locking element 24a, and the clamping surfaces of the locking element 24a facing the locking element 24a, in particular the torque transmission element 20a, and is clamped in place. In a clamped state between the locking element 24a and the axial locking extensions 72a, 74a, 76a, 78a, the inserting tool 54a, in particular the hub of the inserting tool 54a, rests along the circumferential direction 70a against the torque transmission extensions 66a, 68a.The axial locking extensions 72a, 74a, 76a, 78a, viewed in a plane extending at least substantially perpendicular to the output axis 22a, preferably have a teardrop or triangular shape. The torque transmission extensions 66a, 68a extend from the contact surfaces of the axial locking extensions 72a, 74a, 76a, 78a in the direction of the locking element 24a, in particular along a direction extending at least substantially parallel to the output axis 22a. The torque transmission element 20a, viewed in a plane extending at least substantially perpendicular to the output axis 22a, preferably has the shape of a cross with four, in particular equal, legs, wherein the legs of the cross, viewed from the outside inwards, taper conically in the direction of the output axis 22a, and are in particular triangular or teardrop-shaped.The insert tool 54a, in particular the hub of the insert tool 54a, has a design corresponding to the shape of the torque transmission element 20a. However, it is also conceivable that the torque transmission element 20a, viewed in the plane running at least substantially perpendicular to the output axis 22a, has a different shape that would appear sensible to a person skilled in the art.

[0029] Preferably, the locking element 24a has one contact edge 80a, in particular four contact edges 80a (see below). Figure 3, in which only a contact edge 80a is shown), which bears against the tool 54a, in particular against the hub of the tool 54a, for the transmission of a torque in a state of clamping by means of the quick-release clamping unit 18a. Preferably, the contact edges 80a each define a step of the locking element 24a, which run parallel to the clamping surfaces of the locking element 24a. In particular, the axial locking extensions 72a, 74a, 76a, 78a only partially cover the clamping surfaces, especially when considered along a direction that runs at least substantially parallel to the output axis 22a. For example, the axial locking extensions 72a, 74a, 76a, 78a cover the clamping surfaces to less than 80%, preferably to less than 60%, and most preferably to 50% or less.Preferably, the insert tool 54a, particularly in an open state of the quick-release clamping unit 18a, must be lifted from the clamped state of the insert tool 54a when removing it from the quick-release clamping unit 18a and then rotated by an angular range, particularly by 22.5°, and in particular moved out from under the axial locking projections 72a, 74a, 76a, 78a, before the insert tool 54a can be completely removed from the quick-release clamping unit 18a.

[0030] The locking element 24a is mounted on the output spindle 16a so that it is movably transverse in a direction that runs at least substantially parallel to the output axis 22a. The locking element 24a is connected to the output spindle 16a by means of a force-fit and / or form-fit connection that is rotationally fixed but axially movable (see also Figure 4Preferably, the quick-release clamping unit 18a comprises at least one spring element 82a for applying a spring force, in particular a spring force acting along the output axis 22a, preferably in the direction of the torque transmission element 20a, to the locking element 24a. Preferably, the spring element 82a is designed as a compression spring, in particular as a coil spring. However, it is also conceivable that the spring element 82a has a different design that would appear advantageous to a person skilled in the art. The spring element 82a preferably bears against the locking element 24a at one end. More preferably, the spring element 82a bears against a housing extension of the housing 52a of the portable machine tool 12a or against a bearing element 84a, in particular a rolling bearing, such as a ball bearing or the like, of the output unit 14a.The bearing element 84a is preferably designed to rotatably mount the output spindle 16a in the housing 52a. The spring element 82a is preferably designed to provide an automatic return function for the quick-release clamping unit 18a to the closed position and / or to generate a clamping force for the insert tool 54a, particularly after a locking unit 50a of the tool holder 10a has been released. However, it is also conceivable that the quick-release clamping unit 18a may, alternatively or additionally to the spring element 82a, have at least one actuator for providing an automatic return function and / or a clamping force for the insert tool 54a.

[0031] Furthermore, the tool holding device 10a includes at least one locking unit 26a for securing the output spindle 16a against a rotational movement (the locking unit 26a is in Figure 2(shown only in dashed lines, particularly since the tool holding device 10a can also be designed independently of the locking unit 26a). Furthermore, the tool holding device 10a comprises at least one actuating unit 28a, which has at least one actuating element 30a, in particular a movable one, by means of which the locking unit 26a and / or the quick-release clamping unit 18a can be actuated, in particular by means of a movement of the actuating element 30a. The actuating element 30a is preferably designed as a mechanical actuating element, such as an actuating lever, an actuating push button, an actuating rotary knob, an actuating slide, or the like. In the Figures 1 to 4In the illustrated embodiment, the actuating element 30a is preferably designed as an actuating lever. The actuating element 30a is preferably movably, in particular pivotably, mounted on, in particular in, the housing 52a, in particular about a pivot axis 92a of the actuating element 30a which runs at least substantially parallel to the output axis 22a. The actuating element 30a is designed to actuate the quick-release clamping unit 18a, in particular the locking element 24a, in particular as a result of a movement of the actuating element 30a.

[0032] The locking unit 26a preferably comprises a locking element 48a, which is designed to form a positive and / or force-fit connection with a further locking element 86a of the locking unit 26a in at least one state, in particular in an open state of the quick-release clamping unit 18a. The locking element 48a is rotationally fixed to the output spindle 16a. The locking element 48a is preferably movably mounted along a direction extending at least substantially parallel to the output axis 22a, in particular translationally. However, it is also conceivable that the locking element 48a is movably mounted along another direction that would appear advantageous to a person skilled in the art. The locking element 48a is preferably formed integrally with the locking element 24a. The further locking element 86a is preferably formed integrally with the housing 52a.The locking element 48a is preferably movable as a result of actuation of the actuating element 30a, in particular directly by the actuating element 30a or indirectly by the actuating element 30a. The locking element 48a is preferably designed as an axial extension of the locking element 24a, which is arranged in particular on a side of the locking element 24a facing away from the torque transmission element 20a and is designed to engage in the further locking element 86a when the quick-release clamping unit 18a is open. Preferably, the further locking element 86a is fixedly arranged in the housing 52a, in particular designed as a locking recess into which the locking element 48a, designed as an axial extension, engages to block a rotary movement of the output spindle 16a.

[0033] The tool holding device 10a preferably comprises at least one gear unit 32a, which is designed to convert a movement of the actuating element 30a into a movement of the locking element 24a for actuating the locking unit 26a. However, it is also conceivable that the gear unit 32a, particularly in an embodiment of the tool holding device 10a independent of the locking unit 26a, is solely designed to convert a movement of the actuating element 30a into a movement of the locking element 24a, especially to move the quick-release clamping unit 18a into an open state. The gear unit 32a preferably comprises at least one gear element 34a, which is arranged on the actuating element 30a. Preferably, the gear element 34a is arranged directly on the actuating element 30a. Preferably, a movement of the actuating element 30a can be transmitted directly to the gear element 34a.During a pivoting movement of the actuating element 30a about the pivot axis 92a of the actuating element 30a, the gear element 34a is also movable about the pivot axis 92a. Preferably, the actuating element 30a is rotationally fixed to the gear element 34a. The gear element 34a is preferably arranged on a bearing element 88a, in particular a bearing sleeve or a bearing bolt, of the actuating unit 28a for a pivotable mounting of the actuating element 30a, and is particularly formed integrally with the bearing element 88a. The bearing element 88a is rotationally fixed to the actuating element 30a. The gear element 34a is rotationally fixed to the actuating element 30a (see also...). Figure 3 The gear element 34a is arranged in particular on an outer surface of the bearing element 88a.

[0034] The gear element 34a is preferably ramp-shaped. The ramp-shaped gear element 34a is preferably designed to convert a rotary movement of the actuating element 30a into a translational movement of the locking element 24a, in particular along a direction running at least substantially parallel to the output axis 22a of the output spindle 16a. Preferably, the gear element 34a is designed to displace the locking element 24a against the spring force of the spring element 82a along the direction running at least substantially parallel to the output axis 22a of the output spindle 16a, depending on a movement of the actuating element 30a.The gear element 34a interacts, in particular, with a projection 42a arranged on the locking element 24a, especially a circumferential collar of the locking element 24a, to cause the locking element 24a to move depending on the actuation of the actuating element 30a. Preferably, the locking element 24a has at least one ramp-shaped section formed by the projection 42a of the locking element 24a. The ramp-shaped section corresponds to the ramp-shaped gear element 34a. Preferably, the slope of the ramp-shaped gear element 34a and / or the ramp-shaped section of the locking element 24a is less than 50°, more preferably less than 40°, and particularly preferably less than 30°. The ramp-shaped gear element 34a can be formed by an inclined plane or as a helix.The ramp-shaped area formed by the extension 42a of the locking element 24a is preferably a part of the gear unit 32a.

[0035] The gear element 34a, which is provided for moving the locking element 24a depending on actuation of the actuating element 30a, is arranged without contact with the locking element 24a in at least one operating state. Preferably, the gear element 34a is arranged without contact with the locking element 24a when the quick-release clamping unit 18a is closed. In particular, when the quick-release clamping unit 18a is closed, the gear element 34a is spaced apart from the locking element 24a, and especially from the extension 42a of the locking element 24a, along a direction that runs at least substantially parallel to the output axis 22a.To establish contact between the locking element 24a, in particular between the extension 42a of the locking element 24a, and the gear element 34a, the actuating element 30a is pivotable, in particular from a starting position, by an angle, in particular by an angle of less than 10°. Only after the gear element 34a is in contact with the locking element 24a, in particular with the extension 42a of the locking element 24a, is a translational movement of the locking element 24a possible by a rotational movement of the gear element 34a.

[0036] The tool holding device 10a comprises at least one locking unit 50a, which secures the actuating element 30a, the quick-release clamping unit 18a, and / or the locking unit 26a in at least one actuated position. The locking unit 50a preferably comprises at least one locking element 90a, which is designed to secure the actuating element 30a in an actuated position by means of a positive and / or non-positive connection. The locking element 90a can act directly on the actuating element 30a or indirectly on the actuating element 30a via one or more components, in particular components of the gear unit 32a, in order to secure the actuating element 30a in an actuated position by means of a positive and / or non-positive connection.The locking unit 50a is preferably designed to secure the quick-release clamping unit 18a in the open state and to secure the locking unit 26a in a locked state in which a rotary movement of the output spindle 16a is blocked by a positive locking mechanism, particularly as a result of securing the actuating element 30a in an actuated position.

[0037] The locking unit 50a is at least partially formed integrally with the gear unit 32a. Preferably, the locking element 90a of the locking unit 50a is formed integrally with the ramp-shaped gear element 34a. In particular, the locking element 90a is designed as a flat surface or as a recess that connects directly to the ramp-shaped gear element 34a, especially to the inclined plane. Preferably, the locking element 24a, in particular the extension 42a of the locking element 24a, rests against the locking element 90a in a locked position. Preferably, as a result of the action of the spring force of the spring element 82a, the locking element 24a, in particular the extension 42a of the locking element 24a, is pressed against the locking element 90a in a locked position. It is advantageous to counteract movement of the actuating element 30a by a frictional force and / or a positive locking mechanism.The gear element 34a preferably comprises a flattened area, particularly a planar surface, extending at least substantially perpendicular to the pivot axis 92a, which forms the locking element 90a. The locking element 90a preferably forms a kind of plateau on the bearing element 88a. A shoulder (not shown in detail here) is preferably formed between the locking element 90a and the gear element 34a, particularly to ensure reliable retention in the locked position. Preferably, the locking element 90a is designed such that the locked position can be released by over-engaging it, particularly by moving the locking element 90a in the opposite direction to the locking movement.The described design of the tool holder 10a advantageously achieves a high level of user comfort, particularly since, as a result of actuating the actuating element 30a, two units, especially the locking unit 26a and the quick-release clamping unit 18a, can be actuated essentially simultaneously. An operator can be advantageously protected from injury, since it can be ensured that rotation of the output spindle 16a is reliably prevented during a tool change. Easy mounting and / or dismounting of the tool 54a on the quick-release clamping unit 18a is facilitated.

[0038] In Figures 5 to 11Further embodiments of the invention are shown. The following descriptions and drawings are essentially limited to the differences between the embodiments, whereby, with regard to identically designated components, in particular components with the same reference numerals, reference is also generally made to the drawings and / or the description of the other embodiments, in particular the Figures 1 to 4 , can be referenced. To distinguish the embodiments, the letter a is the reference numeral of the embodiment in the Figures 1 to 4 recreated. In the exemplary embodiments of the Figures 5 to 11 The letter a is replaced by the letter b or c.

[0039] Figure 5Figure 1 shows a schematic, perspective view of an alternative tool holding device 10b in a state disassembled from a portable machine tool (not shown in detail here). The tool holding device 10b can preferably be arranged in a portable machine tool, which is essentially analogous to the one described in the Figures 1 to 4 The portable machine tool 12a described is designed as follows. The tool holding device 10b comprises at least one output unit 14b, which includes at least one rotatably driven output spindle 16b, and at least one quick-release clamping unit 18b arranged on the output spindle 16b, which includes at least one torque transmission element 20b non-rotatably connected to the output spindle 16b (see also Figure 6 ) and at least one locking element 24b, movably mounted, in particular axially along an output axis 22b of the output spindle 16b (see also Figure 6) includes. Furthermore, the tool holding device 10b includes at least one locking unit 26b (see also Figures 6 to 7 ) to secure the output spindle 16b against rotational movement. Furthermore, the tool holding device 10b comprises at least one actuating unit 28b, which includes at least one actuating element 30b, in particular one movably mounted (in Figure 5The actuating element 30b (shown only in dashed lines) has a mechanism by which the locking unit 26b can be actuated, in particular as a result of a movement of the actuating element 30b. The actuating element 30b is designed to actuate the quick-release clamping unit 18b, in particular the locking element 24b, in particular as a result of a movement of the actuating element 30b. The actuating element 30b is pivotably mounted about a pivot axis 92b of the actuating element 30b. The pivot axis 92b preferably runs at least substantially parallel to the output axis 22a. The actuating element 30b is preferably designed as an actuating lever, which preferably has an operating lever arm section 94b, which is accessible to an operator, and an actuating lever arm section 96b, by means of which the locking unit 26b can be actuated, in particular directly.The operating lever arm section 94b and the actuating lever arm section 96b are arranged at two opposite ends of the actuating element 30b with respect to the pivot axis 92b. Alternatively, the actuating element 30b is mounted to be translationally displaceable, wherein the actuating element 30b may have at least one ramp-shaped actuating extension to actuate the locking unit 26b by a translational movement of the actuating element 30b.

[0040] The locking unit 26b preferably comprises a locking element 48b, which is provided for a positive and / or force-fit connection with a further locking element 86b of the locking unit 26b, which is in particular rotationally fixed to the output spindle 16b, in at least one state, in particular in the open state of the quick-release clamping unit 18b. The locking element 48b is preferably movably mounted along a direction transverse, in particular at least substantially perpendicular, to the output axis 22b, in particular translationally movably mounted. However, it is also conceivable that the locking element 48b is movably mounted along another direction that would appear sensible to a person skilled in the art. The locking element 48b preferably has at least one transverse projection 98b which is designed to engage in a locking recess 100b of the further locking element 86b, which is in particular rotationally fixed to the output spindle 16b (see also Figure 7 The transverse extension 98b extends, particularly in an assembled state, preferably from a base body of the locking element 48b along a direction at least substantially perpendicular to the output axis 22b in the direction of the output spindle 16b. Preferably, the transverse extension 98b extends at least substantially parallel to a principal extension plane of the base body of the locking element 48b. The principal extension plane of the base body of the locking element 48b extends, particularly in an assembled state, at least substantially perpendicular to the output axis 22b.

[0041] The tool holding device 10b comprises at least one gear unit 32b, which has at least one, in particular ramp-shaped, gear element 34b, 36b, preferably two, in particular ramp-shaped, gear elements 34b, 36b, which is / are arranged on the locking element 48b of the locking unit 26b, in particular is / are formed integrally with the locking element 48b of the locking unit 26b (see also Figure 7 The ramp-shaped gear element(s) 34b, 36b arranged on the locking element 48b is / are preferably provided to engage with a ramp extension 102b, 104b of a further gear element 38b, 40b (see also Figure 8) the gear unit 32b to cooperate, in particular to move the locking element 24b along a direction of movement 44b of the locking element 24b which runs at least substantially parallel to the output axis 22b. The locking element 24b is movable along the direction of movement 44b depending on an actuation of the actuating element 30b, which runs transversely to a direction of movement 46b of the locking unit 26b, along which the locking element 48b of the locking unit 26b is movable depending on an actuation of the actuating element 30b.

[0042] The gear unit 32b preferably comprises at least two further gear elements 38b, 40b, which have an at least substantially analogous design. A description of one of the further gear elements 38b, 40b is preferably analogous to the other of the further gear elements 38b, 40b. The further gear element 38b, 40b is translationally mounted in a housing (not shown in detail here) of the portable machine tool and is operatively connected to the actuating element 30b via the ramp-shaped gear element 34b, 36b. The further gear element 38b, 40b preferably interacts with a projection 42b, in particular a circumferential collar, of the locking element 24b arranged on the locking element 24b to cause movement of the locking element 24b depending on actuation of the actuating element 30b. The further gear element 38b, 40b is preferably designed as a pull rod.Preferably, the further gear element 38b, 40b has a drive extension 106b arranged transversely, in particular at least substantially perpendicularly, to a longitudinal axis of the further gear element 38b, 40b (see also . Figure 8), which is designed to interact with the extension 42b arranged on the locking element 24b, in particular the circumferential collar of the locking element 24b. The further gear element 38b, 40b preferably comprises the ramp extension 104b, which is designed to interact with the ramp-shaped gear element 34b, 36b. The ramp extension 104b preferably extends transversely, in particular at least substantially perpendicularly, to the longitudinal axis of the further gear element 38b, 40b, particularly at an end of the further gear element 38b, 40b facing away from the drive extension 106b of the further gear element 38b, 40b. Preferably, the ramp extension 104b comprises at least one ramp-shaped area, in particular a contact surface inclined to the longitudinal axis of the further gear element 38b, 40b. The ramp-shaped area of ​​the ramp extension 104b is preferably designed to correspond with the ramp-shaped gear element 34b, 36b.In particular, the ramp-shaped area of ​​the ramp extension 104b has a slope corresponding to the ramp-shaped gear element 34b 36b.

[0043] The tool holding device 10b comprises at least one locking unit 50b which secures the actuating element 30b, the quick-release clamping unit 18b and / or the locking unit 26b in at least one actuated position, wherein the locking unit 50b is at least partially formed integrally with the gear unit 32b. Preferably, the locking unit 50b comprises at least one locking element 90b, in particular at least two locking elements 90b, 108b (see also Figure 7The locking elements 90b, 108b have an at least substantially analogous design, such that a description of one of the two locking elements 90b, 108b is legible with respect to the other locking element 90b, 108b. The locking element 90b, 108b is preferably formed integrally with the ramp-shaped gear element 34b, 36b. In particular, the locking element 90b, 108b is designed as a flat surface or as a recess that directly adjoins the ramp-shaped gear element 34b, 36b, especially the inclined plane. Preferably, the ramp extension 104b rests against the locking element 90b, 108b in a locked state of the actuating element 30b.Preferably, as a result of the action of a spring force from a spring element 82b of the quick-release unit 18b, the further gear element 38b, 40b, in particular the ramp extension 104b, is pressed against the detent element 90b, 108b in a locked state, thereby preventing movement of the further gear element 38b, 40b and thus of the actuating element 30b. The further gear element 38b, 40b, in particular the ramp extension 104b, preferably comprises a flattened area, in particular a flat surface (see also ). Figure 8), which is designed to interact with the locking element 90b, 108b. Preferably, the flattened area is arranged between two ramp-shaped areas of the further gear element 38b, 40b, in particular the ramp extension 104b. Preferably, the locking element 90b, 108b is designed such that the secured position can be released by over-engaging it, in particular by moving the locking element 90b, 108b against a locking movement direction. Regarding further features of the

[0044] Figures 5 to 8 The tool holding device 10b shown may, in principle, be based on the description in the Figures 1 to 4 Reference is made to the tool holding device 10a shown, which is essentially analogous to the one shown in the Figures 5 to 8 The tool holder 10b shown is legible.

[0045] Figure 9Figure 1 shows a schematic, perspective view of another alternative tool holding device 10c in a state disassembled from a portable machine tool (not shown in detail here). The tool holding device 10c can preferably be arranged in a portable machine tool, which is essentially analogous to the one described in the Figures 1 to 4 described portable machine tool 12a. The tool holding device 10c comprises at least one output unit 14c, which includes at least one rotatably driven output spindle 16c, and at least one quick-release clamping unit 18c arranged on the output spindle 16c, which includes at least one torque transmission element 20c connected to the output spindle 16c, in particular in a rotationally fixed state (see also Figures 10 and 11) and at least one locking element 24c, secured in particular against axial movement along an output axis 22c of the output spindle 16c (see also Figures 10 and 11 ) comprises. The locking element 24c is movably mounted together with the output spindle 16c, in particular rotating about the output axis 22c. Furthermore, the tool holding device 10c comprises at least one locking unit 26c (see Figure 11 (shown in dashed lines) to secure the output spindle 16c against rotational movement. However, it is also conceivable that the tool holding device 10c is designed independently of the locking unit 26c. Furthermore, the tool holding device 10c comprises at least one actuating unit 28c, which includes at least one actuating element 30c, in particular one that is movably mounted (in Figure 9 and 10(shown only in dashed lines) by means of which the locking unit 26c and / or the quick-release unit 18c can be actuated, in particular as a result of a movement of the actuating element 30c. The actuating element 30c is designed to actuate the quick-release unit 18c, in particular the torque transmission element 20c, in particular as a result of a movement of the actuating element 30c. The Figures 9 to 11 The illustrated tool holding device 10c differs from the previously described embodiments in particular in that some functions which in the previously described embodiments are assigned to the corresponding locking element 24a; 24b are incorporated into the tool holding device 10c. Figures 9 to 11 in the illustrated embodiment, the torque transmission element 20c is associated with, for example, the movable bearing relative to the output spindle 16c or the like.

[0046] The torque transmission element 20c preferably comprises a plurality of torque transmission extensions 66c, 68c (in Figure 9 and 10 (Only two torque transmission extensions 66c, 68c are shown), in particular at least two, preferably at least three and particularly preferably at least four. The torque transmission extensions 66c, 68c are preferably arranged uniformly distributed along a circumferential direction 70c of the quick-release clamping unit 18c on the torque transmission element 20c, in particular according to an n-fold symmetry.

[0047] The locking element 24c preferably comprises at least one axial locking extension 72c, 74c, 76c, 78c, in particular at least four axial locking extensions 72c, 74c, 76c, 78c (see also Figure 9 and 10The axial locking projections 72c, 74c, 76c, 78c are preferably arranged uniformly along the circumferential direction 70c of the quick-release clamping unit 18c on the locking element 24c, particularly according to an n-fold symmetry. The axial locking projections 72c, 74c, 76c, 78c cooperate to axially clamp the insert tool with receiving recesses 120c, 122c of the torque transmission element 20c. Preferably, the insert tool, in particular a hub (not shown in detail here) of the insert tool, is arranged axially along a direction running at least substantially parallel to the output axis 22c in a state secured by means of the quick-clamping unit 18c on the output spindle 16c between the axial locking extensions 72c, 74c, 76c, 78c and the torque transmission element 20c, in particular in the receiving recesses 120c, 122c.In a state clamped between the torque transmission element 20c and the axial locking extensions 72c, 74c, 76c, 78c, the insert tool, in particular the hub of the insert tool, rests against the torque transmission extensions 66c, 68c along the circumferential direction 70c. The receiving recesses 120c, 122c of the torque transmission element 20c are arranged such that, viewed in a plane extending at least substantially perpendicular to the output axis 22c, they preferably form a cross shape with four, in particular equal, legs, wherein the legs of the cross, viewed from the outside inwards, taper conically in the direction of the output axis 22c, and are in particular triangular or teardrop-shaped.The locking element 24c, in particular the axial locking projections 72c, 74c, 76c, 78c, are preferably also arranged such that, viewed in the plane extending at least substantially perpendicular to the output axis 22c, they preferably form a cross shape with four, in particular equally long, legs, wherein the legs of the cross, viewed from the outside inwards, extend conically in the direction of the output axis 22c, and are in particular triangular or teardrop-shaped. The insert tool, in particular the hub of the insert tool, has a design corresponding to the shape or arrangement of the receiving recesses 120c, 122c and to the shape or arrangement of the axial locking projections 72c, 74c, 76c, 78c.

[0048] Preferably, the torque transmission element 20c has a contact edge 80c, in particular four contact edges 80c (in Figure 9 and 10(Only two contact edges 80c are shown), which, in a state of clamping a tool insert (not shown in detail here) by means of the quick-release clamping unit 18c, bear against the tool insert, in particular against a hub of the tool insert, for the transmission of a torque. Preferably, the contact edges 80c each define a step of the torque transmission element 20c, which run parallel to clamping surfaces of the torque transmission element 20c. The contact edges 80c preferably define the torque transmission extensions 66c, 68c. In particular, the axial locking extensions 72c, 74c, 76c, 78c cover the receiving recesses 120c, 122c at least substantially completely in a closed state of the quick-release clamping unit 18c.In the open state of the quick-release clamping unit 18c, the axial locking projections 72c, 74c, 76c, 78c at least substantially completely expose the receiving recesses 120c, 122c, in particular to allow the insertion tool to be arranged in the receiving recesses 120c, 122c. Preferably, the insertion tool, particularly in the open state of the quick-release clamping unit 18c, can be removed from the receiving recesses 120c, 122c by simply moving it along a direction at least substantially parallel to the output axis 22c. The torque transmission element 20c is mounted on the output spindle 16c so as to be translationally movable, in particular along a direction at least substantially parallel to the output axis 22c.Furthermore, the torque transmission element 20c is rotatably mounted, particularly along a limited range of motion, along the circumferential direction 70c relative to the output spindle 16c and relative to the locking element 24c. Preferably, the quick-release clamping unit 18c comprises at least one spring element 82c for applying a spring force, in particular a spring force acting along the output axis 22c, preferably in the direction of the locking element 24c, to the torque transmission element 20c.

[0049] Preferably, the tool holding device 10c comprises at least one gear unit 32c (in Figure 9 and 10(shown only in dashed lines), which is designed to convert a movement of the actuating element 30c, in particular to actuate the locking unit 26c, into a movement of the torque transmission element 20c. The gear unit 32c preferably comprises at least one gear element, in particular a ramp-shaped one (not shown in detail here, but designed analogously to the other embodiments), which is designed to convert a translational or rotational movement of the actuating element 30c into a translational movement of the torque transmission element 20c, in particular along a direction running at least substantially parallel to the output axis 22c of the output spindle 16c.The gear unit 32c preferably comprises at least one, in particular a further, gear element (not shown in detail here, but designed analogously to the other embodiments), which is connected to a projection 42c arranged on the torque transmission element 20c, in particular a circumferential collar (cf. . Figures 9 to 11 ), resulting in a movement of the torque transmission element 20c depending on an actuation of the actuating element 30c. The gear element, in particular a further one, is arranged, particularly analogously to the other embodiments, in at least one operating state without contact with the torque transmission element 20c.

[0050] The tool holding device 10c preferably comprises at least one guide unit 110c, which is designed to guide the movement of the torque transmission element 20c and to limit a maximum movement path, in particular at least a maximum rotation path, of the torque transmission element 20c relative to the output spindle 16c. The guide unit 110c is preferably designed as a cam guide, wherein at least one cam element 112c of the guide unit 110c is arranged, in particular stationary, on the output spindle 16c and at least one further cam element 114c of the guide unit 110c is arranged, in particular stationary, on the torque transmission element 20c. Preferably, the guide unit 110c is designed to guide an axial movement and a rotational movement of the torque transmission element 20c relative to the output spindle 16c.The torque transmission element 20c can preferably perform a stepped movement relative to the output spindle 16c by means of the guide unit 110c, such as an axial movement followed by a rotary movement or vice versa, or the torque transmission element 20c can perform a superimposed movement, such as a superposition of an axial movement and a rotary movement, relative to the output spindle 16c by means of the guide unit 110c. The torque transmission element 20c is preferably movable relative to the locking element 24c by means of the guide unit 110c, in particular to enable the quick-release clamping unit 18c to be moved from an open state to a closed state or vice versa.

[0051] The guide unit 110c preferably comprises at least the cam element 112c, which is arranged, in particular, fixedly on the output spindle 16c and is connected to the torque transmission element 20c for rotational engagement. Preferably, the guide unit 110c comprises at least the cam element 114c, which has at least two guide track sections 116c, 118c extending transversely to each other, in particular an axially extending guide track section 116c and a circumferential guide track section 118c. Preferably, the cam element 112c is designed as a bolt that is rotationally fixed to the output spindle 16c. However, it is also conceivable that the cam element 112c has a different design that would appear advantageous to a person skilled in the art, such as a projection, a groove, a web, a thread, or the like.The cam element 112c preferably extends transversely, and in particular at least substantially perpendicularly, to the output axis 22c, especially when the cam element 112c is configured as a bolt. Preferably, the cam element 112c extends transversely through the output spindle 16c, in particular at least into the locking element 24c or beyond the locking element 24c into the torque transmission element 20c, and in particular into the further cam element 114c arranged on the torque transmission element 20c. The cam element 112c can project beyond the output spindle 16c on one, two, or more sides. The locking element 24c is preferably rotationally fixed to the output spindle 16c by means of the cam element 112c. In particular, the locking element 24c is secured axially along the output axis 22c to the output spindle 16c by means of the cam element 112c.The further cam element 114c is preferably designed as a guide groove. Preferably, the cam element 112c engages in the further cam element 114c. Preferably, the guide unit 110c comprises two further cam elements 114c arranged symmetrically on the torque transmission element 20c, each of which is designed as a guide groove. Preferably, the cam element 112c engages in both further cam elements 114c. The torque transmission element 20c is preferably connected to the output spindle 16c in a rotationally fixed manner, at least when the quick-release clamping unit 18c is closed, by means of an interaction between the cam element 112c and the further cam element 114c(s). Regarding further features of the [reference to be added]... Figures 9 to 11 The tool holding device 10c shown may, in principle, be based on the description in the Figures 1 to 4Reference is made to the tool holding device 10a shown, which is essentially analogous to the one shown in the Figures 9 to 11 The tool holder shown in 10c is legible.

Claims

1. Tool-receiving device for a portable power tool, in particular a power angle grinder, having at least one output unit (14a; 14b; 14c), which comprises at least one output spindle (16a; 16b; 16c), which can be driven in rotation, having at least one quick-action clamping unit (18a; 18b; 18c), which is arranged on the output spindle (16a; 16b; 16c) and comprises at least one torque transmission element (20a; 20b; 20c), which is connected to the output spindle (16a; 16b; 16c), in particular for conjoint rotation therewith, and at least one securing element (24a; 24b; 24c), which is mounted so as to be able to move, in particular axially along an output axis (22a; 22b; 22c) of the output spindle (16a; 16b; 16c), having at least one locking unit (26a; 26b; 26c) for securing the output spindle (16a; 16b; 16c) against a rotational movement, and having at least one actuating unit (28a; 28b; 28c), which has at least one actuating element (30a; 30b; 30c), which is in particular movably mounted and can be used to actuate the locking unit (26a; 26b; 26c), in particular following a movement of the actuating element (30a; 30b; 30c), characterized in that the actuating element (30a; 30b; 30c) is intended to actuate, in particular following a movement of the actuating element (30a; 30b; 30c), the quick-action clamping unit (18a; 18b; 18c), in particular the securing element (24a; 24b; 24c) or the torque transmission element (20a; 20b; 20c).

2. Tool-receiving device according to Claim 1, characterized by at least one gear unit (32a; 32b; 32c), which is intended to convert a movement of the actuating element (30a; 30b; 30c) for actuating the locking unit (26a; 26b; 26c) into a movement of the securing element (24a; 24b) or of the torque transmission element (20c).

3. Tool-receiving device according to Claim 1 or 2, characterized by at least one gear unit (32a; 32b), which has at least one gear element (34a; 34b, 36b), which is in particular ramp-shaped and is intended to convert a translational or rotational movement of the actuating element (30a; 30b) into a translational movement of the securing element (24a; 24b) in particular along a direction running at least substantially parallel to the output axis (22a; 22b) of the output spindle (16a; 16b).

4. Tool-receiving device according to one of the preceding claims, characterized by at least one gear unit (32a; 32b), which has at least one, in particular further, gear element (34a; 38b, 40b), which interacts with an extension (42a; 42b), in particular an encircling collar, arranged on the securing element (24a; 24b), in order to move the securing element (24a; 24b) in a manner dependent on actuation of the actuating element (30a; 30b).

5. Tool-receiving device according to one of the preceding claims, characterized by at least one gear unit (32a; 32b), which has at least one, in particular further, gear element (34a; 38b, 40b) for moving the securing element (24a; 24b) in a manner dependent on actuation of the actuating element (30a; 30b), wherein the gear element (34a; 38b, 40b) is arranged, in at least one operating state, so as to be free from contact with the securing element (24a; 24b).

6. Tool-receiving device according to one of the preceding claims, characterized in that the securing element (24b) can move, in a manner dependent on actuation of the actuating element (30b), along a movement direction (44b) that runs transversely to a movement direction (46b) of the locking unit (26b), along which a locking element (48b) of the locking unit (26b) can move in a manner dependent on actuation of the actuating element (30b).

7. Tool-receiving device according to one of the preceding claims, characterized by at least one gear unit (32b), which has at least one gear element (34b, 36b), which is in particular ramp-shaped and is arranged on a locking element (48b) of the locking unit (26b), in particular is formed in one piece with the locking element (48b) of the locking unit (26b).

8. Tool-receiving device according to one of the preceding claims, characterized by at least one latching unit (50a; 50b), which secures the actuating element (30a; 30b), the quick-action clamping unit (18a; 18b) and / or the locking unit (26a; 26b) in at least one actuated position.

9. Tool-receiving device according to one of the preceding claims, characterized by at least one latching unit (50a; 50b), which secures the actuating element (30a; 30b), the quick-action clamping unit (18a; 18b) and / or the locking unit (26a; 26b) in at least one actuated position, and by at least one gear unit (32a; 32b), wherein the latching unit (50a; 50b) is formed at least partially in one piece with the gear unit (32a; 32b).

10. Tool-receiving device according to one of the preceding claims, characterized by at least one guide unit (110c), which is intended to guide a movement of the torque transmission element (20c) and to limit a maximum movement path, in particular at least a maximum rotational path, of the torque transmission element (20c) relative to the output spindle (16c).

11. Tool-receiving device according to Claim 10, characterized in that the guide unit (110c) is designed as a slot guide, wherein at least one slot element (112c) of the guide unit (110c) is arranged, in particular at a fixed position, on the output spindle (16c) and at least one further slot element (114c) of the guide unit (110c) is arranged, in particular at a fixed position, on the torque transmission element (20c).

12. Tool-receiving device according to Claim 10 or 11, characterized in that the guide unit (110c) has at least one slot element (112c), which is in particular arranged at a fixed position on the output spindle (16c) and is connected to the torque transmission element (20c) in order to drive the torque transmission element (20c) in rotation.

13. Tool-receiving device according to one of Claims 10 to 12, characterized in that the guide unit (110c) has at least one, in particular further, slot element (114c), which has at least two guideway portions (116c, 118c), which run transversely to one another, in particular an axially running guideway portion (116c) and an encircling guideway portion (118c).

14. Portable power tool, in particular a power angle grinder, having at least one tool-receiving device according to one of the preceding claims.