WO2023099084A1

WO2023099084A1 - Tool-receiving devices for portable machine tools, in particular angle grinders

Info

Publication number: WO2023099084A1
Application number: PCT/EP2022/079865
Authority: WO
Inventors: Noah Bernhard; Marcus Schuller; Johannes WOLPERDING; Mustafa Celep; Christoph Wittig
Original assignee: Robert Bosch Gmbh
Priority date: 2021-11-30
Filing date: 2022-10-26
Publication date: 2023-06-08

Abstract

The invention relates to a tool-receiving device for a portable machine tool, in particular for an angle grinder, comprising at least one output unit (14a; 14b; 14c) with at least one output spindle (16a; 16b; 16c) which can be rotated; at least one rapid 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) that is connected to the output spindle (16a; 16b; 16c), in particular in a rotationally fixed manner, and at least one securing element (24a; 24b; 24c), in particular a securing element, which is movably mounted in an axial direction along an output axis (22a; 22b; 22c) of the output spindle (16a; 16b; 16c), comprising at least one locking unit (26a; 26b; 26c) for preventing the output spindle (16a; 16b; 16c) from rotating; and at least one actuating unit (28a; 28b; 28c) that has at least one actuating element (30a; 30b; 30c), in particular a movably mounted actuating element, by means of which the locking unit (26a; 26b; 26c) can be actuated, in particular as a result of a movement of the actuating element (30a; 30b; 30c). According to the invention, the actuating element (30a; 30b; 30c) is designed to actuate the rapid clamping unit (18a; 18b; 18c), in particular the securing element (24a; 24b) or the torque transmission element (20c), in particular as a result of a movement of the actuating element (30a; 30b; 30c).

Description

Tool holding devices for portable machine tools, in particular angle grinders

State of the art

Tool holder devices for portable machine tools, in particular angle grinders, are already known, with the known tool holder devices having at least one output unit which comprises at least one driven spindle which can be driven in rotation, at least one quick-action clamping unit which is arranged on the output spindle and which has at least one torque transmission element which is non-rotatably connected to the output spindle and at least one in particular axially along an output axis of the output spindle, comprises at least one locking unit for securing the output spindle against rotary movement, and at least one actuating unit which has at least one, in particular movably mounted, actuating element by means of which the locking unit can be actuated, in particular as a result of a movement of the actuating element.

Disclosure of Invention

The invention is based on a tool holder device for a portable machine tool, in particular for an angle grinder, with at least one output unit, which comprises at least one output spindle that can be driven in rotation, with at least one quick-action clamping unit arranged on the output spindle, which has at least one, in particular non-rotatably connected to the output spindle Torque transmission element and at least one, in particular axially along an output axis of the output spindle movably mounted, securing element comprises, with at least one locking unit to a Securing the output spindle against rotation, and having at least one actuating unit which has at least one actuating element, in particular movably mounted, by means of which the locking unit can be actuated, in particular as a result of a movement of the actuating element.

It is proposed that the actuating element is provided to actuate the quick-action clamping unit, in particular the securing element or the torque transmission element, in particular as a result of a movement of the actuating element. The actuating element is preferably designed as a mechanical actuating element, such as an actuating bracket, an actuating lever, an actuating pushbutton, an actuating rotary knob, an actuating slide or the like. The actuating element is preferably movable, in particular pivotable, rotatable or movable in translation, on a housing of the portable power tool. However, it is also conceivable that the actuating element is designed as an electrical or electronic actuating element, such as a button, a switch, a touch-sensitive actuating sensor or the like, which generates an electrical or electronic signal as a result of actuation, which leads to activation the locking unit and/or the quick-clamping unit can be processed by a computing unit of the tool holding device or the portable machine tool. In one embodiment of the actuating element as an electrical or electronic actuating element, it is conceivable that actuation of the actuating element can be detected and, depending on detection of the actuation, an electrical signal can be generated that is intended to control one or more actuators, the or the is/are provided for a movement of the securing element and/or a locking element of the locking unit. “Provided” should be understood to mean, in particular, specially set up, specially programmed, specially designed and/or specially equipped. The fact that an object is provided for a specific function is to be understood in particular to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state. By means of the configuration according to the invention, a high level of operating comfort can advantageously be achieved, in particular as a result of actuation of the actuating element, two units, in particular the locking unit and the Quick-release unit can be operated at the same time essentially. An operator can advantageously be protected from injury, since when changing the insert tool it can advantageously be ensured that rotation of the output spindle can be reliably prevented. A simple assembly and/or disassembly of an application tool on the tool receiving device can be made possible. Advantageously, components, in particular further actuating elements, can be saved, as a result of which installation space can advantageously be saved or existing installation space can be used sensibly.

The output unit is preferably provided to drive an application tool attached to the quick-action clamping unit, such as a cutting disk or a grinding wheel or the like, rotating about the output axis. However, it is also conceivable that the output unit is provided for driving the application tool attached to the quick-clamping unit in an oscillating manner about the output axis. The output unit is preferably functionally connected to a drive unit of the portable power tool in a manner already known to a person skilled in the art, in particular via at least one drive pinion of the drive unit. The rotational or oscillating movement of the output unit, in particular the output spindle and the quick-action clamping unit arranged thereon, can preferably be generated as a result of the interaction of the output unit with the drive unit of the portable machine tool, which comprises at least one electric motor or a compressed air motor. The quick-action clamping unit is preferably connected to the output spindle in a rotationally fixed manner. The rotational or oscillating movement of the output spindle can preferably be transmitted via the quick-clamping unit, in particular by means of the torque transmission element, to the insert tool arranged on the quick-clamping unit. The torque transmission element preferably comprises a multiplicity of torque transmission extensions, in particular at least two, preferably at least three and particularly preferably at least four. The torque transmission extensions are preferably distributed uniformly along a circumferential direction of the quick-action clamping unit, in particular according to an n-fold symmetry. However, it is also conceivable that the torque transmission extensions are uneven along the circumferential direction are arranged. The circumferential direction preferably runs in a plane that extends at least essentially perpendicularly to the output axis. The term “essentially perpendicular” is intended to define in particular an alignment of a direction relative to a reference direction, with the direction and the reference direction, viewed in particular in a projection plane, enclosing an angle of 90° and the angle has a maximum deviation of, in particular, less than 8° , advantageously less than 5° and particularly advantageously less than 2°. The torque transmission extensions are preferably arranged offset relative to one another along the circumferential direction, in particular with two torque transmission extensions by 180°, preferably, in particular with three torque transmission extensions, by 120° and very preferably, in particular with four torque transmission extensions, by 90°. The quick-clamping unit is preferably intended to accommodate small application tools, for example application tools with a maximum diameter of 200 mm or less.

The securing element is preferably arranged captively on the output spindle. In particular, the securing element arranged captively on the output spindle and/or each further component arranged captively on the output spindle is captively connected to the output spindle, in particular in an open state and in a closed state of the quick-action clamping unit. An “open state” of the quick-clamping unit is to be understood in particular as a state of the quick-clamping unit which is intended to release the application tool arranged on the quick-clamping unit for disassembly and/or to release the quick-clamping unit for assembly of the application tool on the quick-clamping unit. A "closed state" of the quick-clamping unit is to be understood in particular as a state of the quick-clamping unit in which an application tool is fixed ready for operation on the output unit and/or in which disassembly, in particular non-destructive, of an application tool from the output unit is prevented. The securing element is provided, in particular when the quick-clamping unit is in the closed state, to create a non-positive and/or positive connection to secure or fasten the application tool to the quick-clamping unit with the application tool. ate. Preferably, a form fit, in particular an axial fit, can be implemented by means of the securing element, preferably by clamping at least part of the application tool between at least two components of the quick-action clamping unit. It is conceivable that the securing element, in particular in addition to the axial form fit, creates a form fit in the radial direction and/or in the circumferential direction, with the circumferential direction lying in a plane whose surface normal runs at least essentially parallel to the output axis. In particular, the securing element is mounted so as to be movable in translation and/or rotation about the output axis along a direction running at least substantially parallel to the output axis, in particular in relation to the output unit. “Essentially parallel” is to be understood in particular as an alignment of a direction relative to a reference direction, in particular in a plane, with the direction relative to the reference direction deviating in particular by less than 8°, advantageously less than 5° and particularly advantageously less than 2° ° has. A movement axis of the fixing element preferably runs coaxially to the output axis.

The quick-clamping unit preferably includes at least one spring element for applying a spring force to the securing element or the torque transmission element, 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 securing element. The spring element is preferably designed as a compression spring, in particular as a spiral compression spring. However, it is also conceivable for the spring element to have a different design that appears sensible to a person skilled in the art. The spring element is preferably supported with one end on the securing element or on the torque transmission element. The spring element is preferably supported with a further end on a housing extension of the housing of the portable machine tool or on a bearing element, in particular a roller bearing, such as a ball bearing or the like, of the output unit. The bearing element is preferably provided to rotatably mount the output spindle in the housing. The spring element is preferably provided to realize an automatic return function of the quick-action clamping unit in the closed state. However, it is also conceivable that the quick-release unit alternatively or in addition to the spring element has at least one actuator for realizing an automatic restoring function.

The locking unit preferably comprises a locking element which is provided for a positive and/or non-positive connection with the output spindle or with a further locking element of the locking unit, in particular non-rotatably connected to the output spindle, in at least one state, in particular in the open state of the quick-action clamping unit . The locking element is preferably movably mounted, in particular movably mounted in translation, along a direction running transversely, in particular at least essentially perpendicularly, to the output axis. However, it is also conceivable for the locking element to be movably mounted along another direction that appears sensible to a person skilled in the art, such as being mounted movably in translation along a direction running at least substantially parallel to the output axis. The locking element or the further locking element can be designed in one piece with the securing element or in one piece with the torque transmission element or be designed as a separate component. The locking element or the further locking element can preferably be moved as a result of an actuation of the actuation element, in particular directly by the actuation element or indirectly by the actuation element. “In one piece” is to be understood in particular as being at least cohesively connected, for example by a welding process, an adhesive process, an injection molding process and/or another process that appears sensible to the person skilled in the art, and/or advantageously formed in one piece, such as by a Production from a single casting and/or by production using a single-component 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 that faces away from the torque transmission element and is intended to engage in the further locking element when the quick-action clamping unit is in the open state. In a one-piece configuration of the locking element with the torque transmission element, the locking element is preferably designed as an axial extension of the torque transmission element, in particular on a side facing away from the securing element of the torque transmission element is arranged and is intended to engage in the open state of the quick-release unit in the other locking element. In the case of a one-piece design of the locking element, the further locking element is preferably arranged fixed to the housing with the securing element or with the torque transmission element, in particular 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 securing element or on the torque transmission element and the further locking element is designed as a locking extension which engages in the locking element as a result of a movement of the securing element or the torque transmission element relative to the further locking element. Other configurations and/or arrangements of the locking unit that 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 embodiment. In the alternative embodiment of the tool holding device according to the invention, in particular in the alternative embodiment configured independently of the locking unit, the tool holding device according to the invention preferably comprises at least one output unit, which comprises at least one output spindle that can be driven in rotation, at least one quick-clamping unit arranged on the output spindle, which has at least one, in particular non-rotatable , torque transmission element connected to the output spindle and at least one securing element, in particular 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 movably mounted, by means of which the quick-clamping unit, in particular the securing 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.

Furthermore, it is proposed that the tool holder device comprises at least one gear unit, which is provided for a movement of the actuating element for actuating the locking unit into a movement of the securing element or the torque transmission element, or to convert a movement of the actuating element for actuating the securing element or the torque transmission element into a movement of the locking unit, in particular the locking element. The transmission unit preferably comprises at least one transmission element, which is arranged on the actuating element or at least interacts with the actuating element, in particular bears against the actuating element. The actuating element preferably acts directly on the gear element, or the gear element is arranged on the actuating element. A movement of the actuating element can preferably be transmitted directly to the gear element. The actuating element is preferably connected to the transmission element in a manner which prevents it from moving. "Movement-resistant" is to be understood in particular as a connection between at least two components, in particular the actuating element and the gear element, or between two units, in which a movement of one of the components or one of the units, in particular directly, affects the other component or the other unit is transferrable. In the case of a pivotable mounting of the actuating element, the transmission element is preferably connected to the actuating element in a rotationally fixed manner. In the case of a translationally movable mounting of the actuating element, the transmission element is preferably connected to the actuating element at least in terms of movement, in particular connected to the actuating element in a non-moving manner. The gear unit can have any configuration that a person skilled in the art deems appropriate, such as a cam gear, gear wheel gear, rack and pinion gear, coupling gear or the like. The gear unit can be designed as a purely mechanical gear unit or as an actuator-supported gear unit. By means of the configuration according to the invention, a conversion of an operator force into an actuating force can be achieved in a structurally simple manner. Advantageously, a high level of operating comfort can be achieved, in particular since two units, in particular the locking unit and the quick-release unit, can be operated essentially simultaneously as a result of actuating the actuating element and/or since a low operator force for actuating the actuating element advantageously translates into a large force for moving the Locking element and / or the securing element can be converted. Furthermore, it is proposed that the tool holding device comprises at least one gear unit, in particular the gear unit already mentioned above, which has at least one gear element, in particular ramp-shaped, in particular the gear element already mentioned, which is provided for the purpose of converting a translatory or rotary movement of the actuating element into to convert a translational movement of the securing element or of the torque transmission element, in particular along a direction running at least substantially parallel to the output axis of the output spindle. The transmission element is preferably provided to move the securing 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 as a function of a movement of the actuating element. The securing element or the torque transmission element preferably has at least one ramp-shaped area, in particular a peripheral collar, which is designed to correspond to the ramp-shaped transmission element. An incline of the ramp-shaped transmission element and/or the ramp-shaped area of the securing element or the torque transmission element is preferably less than 50°, preferably less than 40° and particularly preferably less than 30°. The ramp-shaped gear element can be formed by an inclined plane or can be designed as a helical line. The ramp-shaped transmission element can be arranged on the actuating element or on an additional component of the transmission unit that interacts with the actuating element. The ramp-shaped gear element can be rotatably or translationally movably mounted, in particular in the housing of the portable machine tool. As an alternative to the transmission element, it is conceivable that the actuation unit comprises an actuator which moves the securing element or the torque transmission element depending on an actuation of the actuation element along the direction running at least substantially parallel to the output axis. The actuator can be designed as a spindle drive, as a piston drive, such as hydraulic or pneumatic pistons, as an electric motor or the like. By means of the configuration according to the invention, a deflection of a direction of movement can be implemented in a structurally simple manner. It A high level of operating comfort can advantageously be achieved when there is little space, in particular since the deflection of the direction of movement can advantageously make use of an already existing installation space. A conversion of an operator force into an actuating force can be achieved in a structurally simple manner. Advantageously, a high level of operating comfort can be achieved, in particular since a low operator force for actuating the actuating element can advantageously be converted into a large force for moving the locking element and/or the securing element. Advantageously, a preferred force distribution of an operator force required to move the securing element and/or the locking element can be made possible.

In addition, it is proposed that the tool holding device comprises at least one gear unit, in particular the one already mentioned above, which has at least one gear element, in particular another one or the one already mentioned above, which, with an extension arranged on the securing element or on the torque transmission element, in particular the circumferential collar, interacts to a movement of the securing 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 non-moving, particularly non-rotatable manner, with the extension arranged on the securing element or on the torque transmission element, in particular the circumferential collar, to a movement of the securing element or the torque transmission element depending on an actuation of the Actuating element interacts, wherein the circumferential collar is formed corresponding to the ramp-shaped gear element. It is alternatively conceivable that the gear unit has 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, the further gear element having the extension arranged on the securing element or on the torque transmission element, in particular the peripheral one Bund, interacts to a movement of the securing element or the torque transmission element depending on an actuation of the actuating element. The further transmission element is preferably designed as a pull rod. Preferred the further gear element has a driving extension arranged transversely, in particular at least essentially perpendicularly, to a longitudinal axis of the further gear element, which is intended to interact with the extension arranged on the securing element, in particular the circumferential collar. The further gear element preferably comprises a ramp extension which is intended to interact with the ramp-shaped gear element. The ramp extension preferably extends transversely, in particular at least essentially perpendicularly, to the longitudinal axis of the further gear element, in particular at an end of the further gear element which is remote from the driving extension of the further gear element. The ramp extension preferably comprises at least one ramp-shaped area, in particular a contact surface which is inclined relative to the longitudinal axis of the further transmission element. The ramp-shaped area of the ramp extension is preferably designed to correspond to the ramp-shaped gear element. In particular, the ramp-shaped area of the ramp extension has a gradient that corresponds to the ramp-shaped gear element. A reliable movement of the securing element depending on the actuation of the actuating element can advantageously be realized by means of the configuration according to the invention. A movement coupling between the quick-action clamping unit and the locking unit can be implemented in a structurally simple manner. A high level of operating convenience can advantageously be achieved when there is little space available, in particular since the deflection of the direction of movement makes it possible to advantageously use an already existing installation space. Advantageously, a high level of operating convenience can be achieved.

It is also proposed that the tool holding device comprises at least one gear unit, in particular the one already mentioned above, which has at least one gear element, in particular the other gear element already mentioned or the one already mentioned above, to move the securing element or the torque transmission element as a function of an actuation of the actuating element, wherein the additional gear element, in particular the one already mentioned above, or the one already mentioned above, is arranged without contact with the securing element or with the torque transmission element in at least one operating state. This is preferably special previously mentioned further or already previously mentioned gear element in a closed state of the quick-release unit without contact to the securing element or to the torque transmission element. In particular, in a closed state of the quick-action clamping unit, the additional gear element, in particular the one already mentioned above, along a direction running at least essentially parallel to the output axis, is relative to the securing element, in particular relative to the extension of the securing element, or relative to the torque transmission element, in particular relative to the extension of the torque transmission element, arranged at a distance. Preferably, this can be achieved by an offset arrangement of the securing element or the torque transmission element and the further transmission element, in particular already mentioned above, or the one already mentioned above, at least when the quick-release unit is in the closed state, along the direction running at least essentially parallel to the output axis. In the closed state of the quick-action clamping unit, the securing element can be moved by means of the spring force of the spring element up to a maximum position of the securing element such that, along the direction running at least essentially parallel to the output axis, there is a distance between the further, in particular already previously mentioned, or the previously mentioned, Gear element is present, in particular between the extension of the fuse element and the ramp-shaped gear element or between the extension of the fuse element and the extension of the other gear element. By means of the configuration according to the invention, wear on the securing element and/or the gear unit during rotation of the quick-action clamping unit can advantageously be counteracted during operation of the portable machine tool provided with the tool receiving device. A long service life of the tool holding device can advantageously be achieved.

It is further proposed that the securing element can be moved, depending on an actuation of the actuating element, along a direction of movement which runs transversely, in particular at least essentially perpendicularly, to a direction of movement of the locking unit, along which a, in particular the previously mentioned locking element of the locking unit can be moved as a function of an actuation of the actuating element. The direction of movement of the securing element preferably runs at least essentially parallel to the output axis. A movement direction of the locking element preferably runs transversely, in particular at least essentially perpendicularly, to the output axis, in particular in the case of a design of the locking element which is separate from the securing element. It is also conceivable, however, for the direction of movement of the securing element and/or the direction of movement of the locking element to have/have a different alignment that appears sensible to a person skilled in the art. By means of the configuration according to the invention, an already existing installation space can advantageously be used sensibly. A movement coupling between the quick-action clamping unit and the locking unit can be implemented in a structurally simple manner.

In addition, it is proposed, in particular in at least one configuration, that the tool holding device comprises at least one, in particular the aforementioned gear unit, which has at least one, in particular the aforementioned ramp-shaped gear element, which is mounted on one, in particular the aforementioned, Locking element of the locking unit is arranged, in particular is formed in one piece with the locking element of the locking unit. The locking element preferably has at least one transverse extension, which is provided for engaging in a locking recess of the further locking element, which is in particular non-rotatably connected to the output spindle. The transverse extension extends, in particular in a mounted state, preferably starting from a base body of the locking element along a direction running at least substantially perpendicularly to the output axis in the direction of the output spindle. The transverse extension preferably extends at least essentially parallel to a main extension plane of the main body of the locking element. The main extension plane of the base body of the locking element extends, in particular in a mounted state, at least essentially perpendicular to the output axis. The ramp-shaped gear element arranged on the locking element is preferably provided to interact with the ramp extension of the further gear element, in particular to move the securing element along the at least least to move substantially parallel to the output axis direction of movement of the securing element. By means of the configuration according to the invention, an already existing installation space can advantageously be used sensibly. Advantageously, costs, assembly work and components can be saved. A movement coupling between the quick-action clamping unit and the locking unit can be implemented in a structurally simple manner.

Furthermore, it is proposed that the tool holder device comprises at least one locking unit, which secures the actuating element, the quick-clamping unit and/or the locking unit in at least one actuated position. The latching unit preferably comprises at least one latching element which is provided to secure the actuating element in an actuated position by means of a positive and/or non-positive connection. The latching element can act directly on the actuating element or indirectly act on the actuating element with the interposition of one or more components, in particular components of the transmission unit, in order 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 latching element is provided to secure the actuating element in an actuated position by means of the action of a magnetic force. Other configurations of the latching unit that appear reasonable to a person skilled in the art for securing the actuating element in an actuated position are also conceivable. The latching unit is preferably provided, in particular as a result of the actuating element being secured in an actuated position, to secure the quick-action clamping unit in the open state and to secure the locking unit in a locked state in which a rotational movement of the output spindle is blocked by a form fit. A high level of operating comfort can advantageously be achieved by means of the configuration according to the invention. An operator can advantageously be protected from injury, since when changing the insert tool it can advantageously be ensured that rotation of the output spindle can be reliably prevented.

It is also proposed that the tool holder device comprises at least one latching unit, which secures the actuating element, the quick-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 gear unit already mentioned above, the latching unit being at least partially formed in one piece with the gear unit. The fact that a unit is designed in one piece with a further unit is to be understood in particular as meaning that the unit and the further unit have at least one shared component which is provided for the function of the unit and the further unit. The latching element of the latching unit is preferably formed in one piece with the ramp-shaped gear element. In particular, the latching element is designed as a flat surface or as a depression that directly adjoins the ramp-shaped gear element, in particular the inclined plane. The securing element or the further gear element, in particular the ramp extension, preferably lies against the latching element when the actuating element is in a secured state. As a result of the action of the spring force of the spring element, the securing element or the further gear element, in particular the ramp extension, is preferably pressed against the latching element in a secured state, as a result of which in particular a movement of the securing element or the further gear element and thus the actuating element can be prevented. The further transmission element, in particular the ramp extension, preferably comprises a flattened area, in particular a flat surface, which is intended to interact with the latching element. The flattened area is preferably arranged between two ramp-shaped areas of the further transmission element, in particular of the ramp extension. The latching element is preferably designed in such a way that the secured position can be released by over-latching, in particular as a result of a movement of the latching element counter to a direction of latching movement. A high level of operating comfort can advantageously be achieved by means of the configuration according to the invention. An operator can advantageously be protected from injury, since it can advantageously be ensured that the actuating element can be reliably prevented from snapping back unintentionally. A compact design can advantageously be achieved. Existing installation space can advantageously be used sensibly. It is also proposed that the tool holding device, in particular in an alternative configuration, comprises at least one guide unit which is provided for guiding a movement of the torque transmission element and for limiting a maximum movement distance, in particular at least a maximum twisting distance, of the torque transmission element relative to the output spindle. The guide unit is preferably provided for guiding an axial movement of the torque transmission element relative to the output spindle. Alternatively or additionally, the guide unit is preferably provided for guiding a rotary movement of the torque transmission element relative to the output spindle, in particular for guiding a rotary movement of the torque transmission element around the output spindle. The torque transmission element can be rotated in particular along an angular range of less than 90°, preferably less than 60° and particularly preferably more than 15° relative to the output spindle. The torque transmission element can preferably be rotated along the circumferential direction relative to the output spindle. The torque transmission element can preferably be moved axially along a maximum axial distance of in particular less than 10 mm, preferably less than 5 mm and particularly preferably less than 3 mm relative to the output spindle. The torque transmission element can use the guide unit to perform a stepped movement relative to the output spindle, such as an axial movement followed by a rotary motion or vice versa, or the torque transmission element can use the guide unit to perform a superimposed movement, such as superimposing an axial movement and a rotary motion, relative to the output spindle . The torque transmission element can be moved by the guide unit, preferably relative to the securing element, in particular in order to enable the quick-action clamping unit to be transferred from an open state to a closed state or vice versa. By means of the configuration according to the invention, simple assembly and/or disassembly of an application tool on the tool receiving device can be made possible. A reliable movement, in particular of the torque transmission element, can be made possible within predetermined limits. Reliable and accurate positioning of the torque transmission element relative to the securing element can advantageously be implemented, in particular by easy removal of a application tool from the quick-clamping unit or to allow easy insertion of the application tool on the quick-clamping unit.

It is also proposed that the guide unit is designed as a link guide, with at least one link element of the guide unit being arranged, in particular stationary, on the output spindle and at least one other link element of the guide unit being arranged, in particular stationary, on the torque transmission element. The link element is preferably designed as a bolt which is connected in a torque-proof manner to the output spindle. However, it is also conceivable for the link element to have a different configuration that appears sensible to a person skilled in the art, such as a configuration as an extension, a groove, a web, a thread or the like. The link element preferably extends transversely, in particular at least essentially perpendicular to the output axis, in particular when the link element is configured as a bolt. The link element preferably extends transversely through the output spindle, in particular at least into the securing element or beyond the securing element into the torque transmission element, in particular into the further link element arranged on the torque transmission element. The link element can protrude beyond the output spindle on one side, on two sides or on more than one side. The securing element is preferably non-rotatably connected to the output spindle by means of the link element. In particular, the securing element is arranged on the output spindle in a manner secured axially along the output axis by means of the link element. The other link element is preferably designed as a guide groove. The link element preferably engages in the further link element. Preferably, the guide unit comprises two further link elements which are arranged mirror-symmetrically on the torque transmission element and are each designed as a guide groove. The link element preferably engages in both further link elements. However, it is also conceivable that the link element is designed as a guide groove and is introduced into the output spindle, with the further link element being designed as a bolt which is arranged in a rotationally fixed manner on the torque transmission element and extends through the link element designed as a guide groove. The torque transmission element is preferably connected by means of a menwirks the link element and the other link element at least in the closed state of the quick-release unit rotationally test connected to the output spindle. By means of the configuration according to the invention, a movement path, in particular of the torque transmission element relative to the output spindle, can be predetermined in a structurally simple manner. A reliable movement, in particular of the torque transmission element, can be made possible within predetermined limits, in particular for realizing a transfer of the quick-action clamping unit from the open state to the closed state and vice versa. Advantageously, a reliable and precise positioning of the torque transmission element relative to the securing element can be implemented, in particular to allow an application tool to be easily removed from the quick-action clamping unit or to enable the application tool to be easily introduced to the quick-action clamping unit.

Furthermore, it is proposed that the guide unit has at least one link element, in particular arranged stationarily on the output spindle, in particular the previously mentioned link element, which is connected to the torque transmission element to drive the torque transmission element in rotation. Preferably, the sliding link element is positively and/or non-positively connected to the torque transmission element to drive the torque transmission element in rotation. The link element preferably engages in the further link element arranged on the torque transmission element and bears against edge regions of the link element designed as a guide groove for rotary entrainment. The link element is preferably provided, at least in a closed state of the quick-action clamping unit, for driving the torque transmission element in rotation, in particular for transmitting torque from the output spindle to the torque transmission element. By means of the configuration according to the invention, a rotary driving of the torque transmission element can be implemented in a structurally simple manner at least in a closed state of the quick-action clamping unit, whereby a movement of the torque transmission element can also be implemented by the guide unit, which leads to a simple transfer of the quick-action clamping unit, for example to a open state, is provided. A movement path, in particular of the torque transmission element relative to the output spindle, can be predetermined in a structurally simple manner.

It is also proposed that the guide unit has at least one, in particular another, link element, in particular the previously mentioned further link element, which has at least two guideway sections running transversely to one another, in particular an axially running guideway section and a circumferential guideway section. The two guideway sections running transversely to one another are preferably arranged directly adjacent to one another. The axially running guide track section preferably has a main orientation which runs at least essentially parallel to the output axis. The peripheral guideway section is preferably arranged at an angle relative to the axially running guideway section, particularly viewed in a projection plane. The peripheral guideway section preferably runs along the circumferential direction with a pitch, in particular similar to a section of a thread turn of a thread. The peripheral guide track section extends along the circumferential direction, in particular along an angular range of less than 90°, preferably less than 70° and particularly preferably less than 50°. The guide unit is preferably designed in such a way that the torque transmission element can be rotated relative to the securing element along an angular range of, for example, 45°. Other angular ranges that appear reasonable to a person skilled in the art are also conceivable, which are useful for transferring the quick-action clamping unit from a closed state to an open state. Covering of an application tool by the securing element is preferably released as a result of a rotation of the torque transmission element relative to the securing element, in particular along an angular range of 45°. The application tool can preferably be rotated with the torque transmission element, in particular as a result of parts of a tool hub of the application tool resting on torque transmission extensions of the torque transmission element when the application tool is in a state on the quick-action clamping unit. By means of the configuration according to the invention, constructive tiv simply first an axial movement of the torque transmission element and the securing element can be realized before a rotary movement to a release of an application tool takes place. Advantageously, a tool and/or component-friendly movement of the torque transmission element can be made possible, in particular with a low tendency to abrasion when the quick-clamping unit is actuated.

In addition, a portable machine tool, in particular an angle grinder, is proposed with at least one tool holding device according to the invention. A “portable machine tool” is to be understood here in particular as a machine tool for processing workpieces, which can be transported by an operator without a transport machine. In particular, the portable machine tool has a mass that is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg. The portable machine tool is preferably designed as an angle grinder. However, it is also conceivable for the portable power tool to have a different design that would appear sensible to a person skilled in the art, such as a design as a circular saw, as an oscillating power tool, as a grinding machine or the like since two units, in particular the locking unit and the quick-release unit, can be actuated essentially at the same time as a result of an actuation of the actuating element. An operator can advantageously be protected from injury, since when changing the insert tool it can advantageously be ensured that rotation of the output spindle can be reliably prevented. A simple assembly and/or disassembly of an application tool on the tool receiving device can be made possible. Advantageously, components, in particular further actuating elements, can be saved, as a result of which installation space can advantageously be saved or existing installation space can be used sensibly.

The tool holding device according to the invention and/or the portable machine tool according to the invention should/should not be limited to the application and embodiment described above. In particular, / can the tool holder device according to the invention and / or portable machine tools according to the invention have a number of individual elements, components and units that differs from a number specified herein in order to fulfill a function described herein.

drawing

Further advantages result from the following description of the drawings. Exemplary embodiments of the invention are shown in the drawing. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into further meaningful combinations.

Show it:

1 shows a schematic view of a portable power tool according to the invention with a tool receiving device according to the invention,

2 shows a schematic view of the tool holding device according to the invention in an at least partially dismantled housing of the portable machine tool according to the invention,

3 shows a schematic, perspective view of the tool holding device according to the invention,

4 shows a schematic view of a section through the tool holding device according to the invention,

5 shows a schematic, perspective view of an alternative tool holding device according to the invention,

6 shows a schematic view of a section through the alternative tool holding device according to the invention,

7 shows a schematic view of a ramp-shaped transmission element of the alternative tool holding device according to the invention, which is designed in one piece with a locking element, 8 shows a schematic view of a further transmission element of the alternative tool holding device according to the invention,

9 shows a schematic, perspective view of a further alternative tool holding device according to the invention, with a quick-clamping unit of the further alternative tool holding device according to the invention being in an open state,

10 shows a schematic, perspective view of the further alternative tool holding device according to the invention, with the quick-clamping unit of the further alternative tool holding device according to the invention being in a closed state and

11 shows a schematic view of a section through the further alternative tool holding device according to the invention.

Description of the exemplary embodiments

Figure 1 shows a portable power tool 12a with at least one tool receiving device 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 appears reasonable to a person skilled in the art, such as a configuration as a grinding machine, a multifunction machine, a circular saw machine or the like. The portable machine tool 12a is preferably intended for use with insert tools 54a (cf. Figure 2 ) provided with a maximum diameter of less than 200 mm, in particular less than 120 mm. FIG. 1 does not show a battery pack that can be arranged on a housing 52a of the portable power tool 12a, in particular in a main handle 56a formed by the housing 52a of the portable power tool 12a. The main handle 56a preferably has a main axis of extension which is at least essentially perpendicular to an output axis 22a of an output spindle 16a of an output unit 14a (cf. FIG. 2) of the tool receiving device 10a. The output unit 14a is at least partially arranged in the housing 52a. The portable machine tool 12a includes a drive unit 58a, which is arranged in the housing 52a, in particular at least partially in a part of the housing 52a in which the output unit 14a is also arranged. The drive unit 58a preferably has an axis of rotation 60a which runs at least essentially parallel, in particular coaxially, to the output axis 22a. The drive unit 58a is provided for driving the output unit 14a in a manner already known to a person skilled in the art. The drive unit 58a is preferably provided for a direct drive of the output spindle 16a. The output spindle 16a can be driven in rotation about the output axis 22a of the output spindle 16a by means of the drive unit 58a. However, it is also conceivable that the output spindle 16a can be driven in an oscillating manner about the output axis 22a by means of the drive unit 58a. The drive unit 58a preferably includes an electric motor (not shown in detail here). A rotor shaft (not shown in detail here) of the electric motor is preferably connected in a torque-proof manner to the output spindle 16a. However, it is also conceivable for the rotor shaft to be connected to the output spindle 16a via a belt drive, via a gear train 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.

Figure 2 shows a schematic view of the tool holder device 10a in the at least partially dismantled housing 52a of the portable power tool 12a. The tool receiving device 10a for the portable machine tool 12a comprises at least the output unit 14a, which comprises at least the rotationally drivable output spindle 16a, and at least one quick-clamping unit 18a which is arranged on the output spindle 16a and which has at least one torque transmission element 20a which is non-rotatably connected to the output spindle 16a (see also figures 3 and 4) and at least one securing element 24a (cf. also FIGS. 3 and 4) which is movably mounted, in particular axially along the output axis 22a of the output spindle 16a.

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

The torque transmission element 20a preferably comprises at least one axial securing extension 72a, 74a, 76a, 78a, in particular at least four axial securing extensions 72a, 74a, 76a, 78a (cf. also FIG. 3). The axial securing extensions 72a, 74a, 76a, 78a are preferably distributed uniformly along the circumferential direction 70a of the quick-release unit 18a on the torque transmission element 20a, in particular according to an n-fold symmetry. The axial securing extensions 72a, 74a, 76a, 78a and the torque transmission extensions 66a, 68a are preferably formed in one piece with one another. The axial securing extensions 72a, 74a, 76a, 78a, in particular the contact surfaces of the axial securing extensions 72a, 74a, 76a, 78a facing the housing 52a, cooperate with the securing element 24a to axially clamp the insertion tool 54a. The insertion tool 54a, in particular a hub (not shown in detail here) of the insertion tool 54a, is preferably in a state secured by means of the quick-action clamping unit 18a on the output spindle 16a axially along a direction running at least substantially parallel to the output axis 22a between the axial securing extensions 72a, 74a, 76a, 78a, in particular between the contact surfaces of the axial securing extensions 72a, 74a, 76a, 78a facing the securing element 24a, and the securing element 24a, in particular the clamping surfaces of the securing element 24a facing the torque transmission element 20a, arranged, in particular clamped. In a clamped state between securing element 24a and axial securing projections 72a, 74a, 76a, 78a, insertion tool 54a, in particular the hub of insertion tool 54a, rests against torque transmission projections 66a, 68a along circumferential direction 70a. The axial securing extensions 72a, 74a, 76a, 78a have viewed in one at least substantially perpendicular to the output axis 22a plane, preferably a drop-shaped or triangular shape. Starting from the contact surfaces of the axial securing extensions 72a, 74a, 76a, 78a, the torque transmission extensions 66a, 68a extend in the direction of the securing element 24a, in particular along a direction running at least substantially parallel to the output axis 22a. Torque transmission element 20a, viewed in a plane running at least substantially perpendicularly to output axis 22a, preferably has the shape of a cross with four legs, in particular of equal length, with the legs of the cross running conically in the direction of output axis 22a when viewed from the outside in , in particular triangular or drop-shaped, are formed. The insertion tool 54a, in particular the hub of the insertion tool 54a, has a configuration that corresponds 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 perpendicularly to the output axis 22a, has a different shape that appears sensible to a person skilled in the art.

Securing element 24a preferably has a contact edge 80a, in particular four contact edges 80a (cf. Figure 3, in which only one contact edge 80a is shown), which is/are used to transmit a torque when the insert tool 54a is clamped by means of the quick-action clamping unit 18a rests/rest on the insertion tool 54a, in particular on the hub of the insertion tool 54a. Preferably, the contact edges 80a each delimit a step of the securing element 24a, which run parallel to the clamping surfaces of the securing element 24a. In particular, the axial securing extensions 72a, 74a, 76a, 78a only partially cover the clamping surfaces, in particular viewed along a direction running at least substantially parallel to the output axis 22a. For example, the axial securing extensions 72a, 74a, 76a, 78a cover the clamping surfaces by less than 80%, preferably by less than 60% and very particularly preferably by 50% or less. Preferably, the insertion tool 54a, in particular when the quick-action clamping unit 18a is in an open state, must be lifted from the clamped state of the insertion tool 54a when it is removed from the quick-action clamping unit 18a and then by an angular range, in particular by 22.5°. be rotated, in particular moved out from under the axial securing extensions 72a, 74a, 76a, 78a before the insertion tool 54a can be completely removed from the quick-action clamping unit 18a.

The securing element 24a is mounted on the output spindle 16a so that it can move in a translatory manner, in particular along a direction running at least essentially parallel to the output axis 22a. The securing element 24a is connected to the output spindle 16a in a rotationally fixed but axially movable manner by means of a non-positive and/or positive connection (cf. also FIG. 4). The quick-release unit 18a preferably includes at least one spring element 82a for applying a spring force to the securing element 24a, in particular a spring force acting along the output axis 22a, preferably in the direction of the torque transmission element 20a. The spring element 82a is preferably designed as a compression spring, in particular as a spiral compression spring. It is also conceivable, however, for the spring element 82a to have a different configuration that appears sensible to a person skilled in the art. The spring element 82a is preferably supported with one end on the securing element 24a. Another end of spring element 82a is preferably supported on a housing extension of housing 52a of portable machine tool 12a or on a bearing element 84a, in particular a roller bearing, such as a ball bearing or the like, of output unit 14a. The bearing element 84a is preferably provided to mount the output spindle 16a rotatably in the housing 52a. The spring element 82a is preferably provided to implement an automatic return function of the quick-action clamping unit 18a in the closed state and/or to generate a pressing force to clamp the insertion tool 54a, in particular after a latching unit 50a of the tool receiving device 10a has been released. It is also conceivable, however, for the quick-clamping unit 18a to have at least one actuator for implementing an automatic restoring function and/or a pressing force for clamping the insertion tool 54a as an alternative or in addition to the spring element 82a.

Furthermore, the tool holder device 10a comprises at least one locking unit 26a for securing the output spindle 16a against a rotational movement. tion (the locking unit 26a is shown in FIG. 2 only in broken lines, in particular since the tool receiving device 10a can also be configured independently of the locking unit 26a). In addition, the tool holding device 10a comprises at least one actuating unit 28a, which has at least one actuating element 30a, in particular a movably mounted actuating element, by means of which the locking unit 26a and/or the quick-action clamping unit 18a can be actuated, in particular as a result of a movement of the actuating element 30a. Actuating element 30a is preferably embodied as a mechanical actuating element, such as an actuating bracket, an actuating lever, an actuating pushbutton, an actuating rotary knob, an actuating slide or the like. In the exemplary embodiment illustrated in FIGS. 1 to 4, actuating element 30a is preferably embodied as an actuating lever. The actuating element 30a is preferably movable, in particular pivotable, mounted on, in particular in, the housing 52a, in particular about a pivot axis 92a of the actuating element 30a running at least substantially parallel to the output axis 22a. The actuating element 30a is intended to actuate the quick-action clamping unit 18a, in particular the securing element 24a, in particular as a result of a movement of the actuating element 30a.

The locking unit 26a preferably includes a locking element 48a, which is provided for a positive and/or non-positive 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-action clamping unit 18a. The locking element 48a is non-rotatably connected to the output spindle 16a. The locking element 48a is preferably movably mounted along a direction running at least substantially parallel to the output axis 22a, in particular movably mounted in a translational manner. However, it is also conceivable for the locking element 48a to be mounted such that it can be moved along another direction that appears sensible to a person skilled in the art. The locking element 48a is preferably formed in one piece with the securing element 24a. The further locking element 86a is preferably formed in one piece with the housing 52a. The locking element 48a is preferably movable as a result of an 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 as Formed axial extension of the securing element 24a, which is arranged in particular on a side facing away from the torque transmission element 20a of the securing element 24a and is intended to engage in the open state of the quick-release unit 18a in the further locking element 86a. The further locking element 86a is preferably arranged fixed to the housing in the housing 52a, in particular designed as a locking recess, in which the locking element 48a designed as an axial extension engages to block a rotary movement of the output spindle 16a.

The tool receiving device 10a preferably comprises at least one gear unit 32a, which is provided to convert a movement of the actuating element 30a into an actuation of the locking unit 26a into a movement of the securing element 24a. However, it is also conceivable that gear unit 32a, in particular in one configuration of tool receiving device 10a independently of locking unit 26a, is only provided to convert a movement of actuating element 30a into a movement of securing element 24a, in particular to convert quick-action clamping unit 18a into an open to transfer state. The transmission unit 32a preferably includes at least one transmission element 34a, which is arranged on the actuating element 30a. The transmission element 34a is preferably arranged directly on the actuating element 30a. A movement of the actuating element 30a can preferably be transmitted directly to the gear element 34a. When the actuating element 30a pivots about the pivot axis 92a of the actuating element 30a, the gear element 34a can likewise be moved about the pivot axis 92a. The actuating element 30a is preferably connected in a rotationally fixed manner 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, in particular formed in one piece with the bearing element 88a. The bearing element 88a is non-rotatably connected to the actuating element 30a. The gear element 34a is non-rotatably connected to the actuating element 30a (cf. also FIG. 3). The transmission element 34a is arranged in particular on an outer surface of the bearing element 88a. The gear element 34a is preferably designed in the form of a ramp. The ramp-shaped transmission element 34a is preferably provided to convert a rotational movement of the actuating element 30a into a translatory movement of the securing element 24a, in particular along a direction running at least substantially parallel to the output axis 22a of the output spindle 16a. The transmission element 34a is preferably provided to move the securing 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 an extension 42a arranged on the securing element 24a, in particular a circumferential collar of the securing element 24a, to move the securing element 24a as a function of an actuation of the actuating element 30a. The securing element 24a preferably has at least one ramp-shaped area which is formed by the extension 42a of the securing element 24a. The ramp-shaped area is designed to correspond to the ramp-shaped gear element 34a. An incline of the ramp-shaped gear element 34a and/or the ramp-shaped area of the securing element 24a is preferably less than 50°, preferably less than 40° and particularly preferably less than 30°. The ramp-shaped gear element 34a can be formed by an inclined plane or be designed as a helical line. The ramp-shaped area formed by the extension 42a of the securing element 24a is preferably part of the transmission unit 32a.

The transmission element 34a, which is provided for a movement of the securing element 24a as a function of an actuation of the actuating element 30a, is arranged without contact with the securing element 24a in at least one operating state. The transmission element 34a is preferably arranged without contact with the securing element 24a when the quick-action clamping unit 18a is in a closed state. In particular, the transmission element 34a is in a closed state of the quick-release unit 18a along a direction running at least substantially parallel to the output axis 22a relative to the securing element 24a, in particular relative to the extension 42a of the securing element. ments 24a, spaced apart. In order to establish contact between the securing element 24a, in particular between the extension 42a of the securing element 24a, and the gear element 34a, the actuating element 30a can be pivoted, in particular starting from a starting position, through an angle, in particular through an angle of less than 10° . A translational movement of the securing element 24a can only be implemented by a rotational movement of the gearing element 34a after the gear element 34a has made contact with the securing element 24a, in particular with the extension 42a of the securing element 24a.

The tool receiving device 10a comprises at least one latching unit 50a, which secures the actuating element 30a, the quick-action clamping unit 18a and/or the locking unit 26a in at least one actuated position. The latching unit 50a preferably comprises at least one latching element 90a, which is provided to secure the actuating element 30a in an actuated position by means of a positive and/or non-positive connection. Latching element 90a can act directly on actuating element 30a or indirectly on actuating element 30a with the interposition of one or more components, in particular components of transmission unit 32a, in order to move actuating element 30a by means of a positive and/or non-positive connection in an actuated to secure position. The latching unit 50a is preferably provided, in particular as a result of the actuating element 30a being secured in an actuated position, to secure the quick-action clamping unit 18a in the open state and the locking unit 26a in a locked state in which a rotational movement of the output spindle 16a is blocked by a form fit. to secure.

The latching unit 50a is formed at least partially in one piece with the gear unit 32a. The latching element 90a of the latching unit 50a is preferably formed in one piece with the ramp-shaped gear element 34a. In particular, the detent element 90a is designed as a flat surface or as a depression that directly adjoins the ramp-shaped gear element 34a, in particular the inclined plane. The securing element 24a, in particular the extension 42a of the securing element 24a, preferably lies against the latching element 90a in a secured state. It is preferred as a result of the action of the spring force of the Spring element 82a presses the securing element 24a, in particular the extension 42a of the securing element 24a, in a secured state against the latching element 90a. A movement of the actuating element 30a can advantageously be counteracted by a frictional force and/or a form fit. The transmission element 34a preferably comprises a flattened area, in particular running at least essentially perpendicularly to the pivot axis 92a, in particular a flat surface, which forms the latching 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 latching element 90a and the gear element 34a, in particular in order to achieve reliable holding in the secured position. The latching element 90a is preferably designed in such a way that the secured position can be released by over-latching, in particular as a result of a movement of the latching element 90a counter to a direction of latching movement. A high level of operating convenience can advantageously be achieved by means of the described configuration of the tool receiving device 10a, in particular since two units, in particular the locking unit 26a and the quick-clamping unit 18a, can be actuated essentially at the same time as a result of an actuation of the actuating element 30a. An operator can advantageously be protected from injury, since when an insert tool is changed it can advantageously be ensured that rotation of the output spindle 16a can be reliably prevented. A simple assembly and/or disassembly of the insertion tool 54a on the quick-clamping unit 18a can be made possible.

Further exemplary embodiments of the invention are shown in FIGS. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, whereby with regard to components with the same designation, in particular with regard to components with the same reference numbers, the drawings and/or the description of the other exemplary embodiments, in particular Figures 1 to 4, can be referred. To distinguish between the exemplary embodiments, the letter a follows the reference number of the exemplary embodiment in FIGS. In the exemplary embodiments of FIGS. 5 to 11, the letter a has been replaced by the letter b or c. FIG. 5 shows a schematic, perspective view of an alternative tool receiving device 10b in a state dismantled from a portable machine tool (not shown in detail here). The tool receiving device 10b can preferably be arranged in a portable machine tool, which is designed essentially analogously to the portable machine tool 12a described in the description of FIGS. The tool holding device 10b comprises at least one output unit 14b, which comprises at least one output spindle 16b which can be driven in rotation, and at least one quick-action clamping unit 18b which is arranged on the output spindle 16b and which has at least one torque transmission element 20b (cf. also Figure 6) connected in a rotationally fixed manner to the output spindle 16b and at least one , In particular axially along an output axis 22b of the output spindle 16b, movably mounted securing element 24b (see also FIG. 6). Furthermore, the tool holding device 10b comprises at least one locking unit 26b (cf. also FIGS. 6 to 7) for securing the output spindle 16b against a rotational movement. Furthermore, the tool holding device 10b comprises at least one actuating unit 28b, which has at least one, in particular movably mounted, actuating element 30b (shown only in phantom in Figure 5), by means of 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 intended to actuate the quick-action clamping unit 18b, in particular the securing element 24b, in particular as a result of a movement of the actuating element 30b. The actuating element 30b is mounted pivotably 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 that can be gripped by 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 in relation to the pivot axis 92b. Alternatively, the actuating element 30b is mounted in a translationally displaceable manner, wherein the actuating element 30b can have at least one ramp-shaped actuating extension in order to actuate the locking unit 26b by a translational movement of the actuating element 30b. The locking unit 26b preferably comprises a locking element 48b, which can be used to form a positive and/or non-positive connection with a further locking element 86b of the locking unit 26b, which is in particular connected in a torque-proof manner to the output spindle 16b, in at least one state, in particular in the open state of the quick-action clamping unit 18b. is provided. The locking element 48b is preferably movably mounted, in particular movably mounted in translation, along a direction running transversely, in particular at least essentially perpendicularly, to the output axis 22b. However, it is also conceivable for the locking element 48b to be mounted such that it can be moved along another direction that appears sensible to a person skilled in the art. The locking element 48b preferably has at least one transverse extension 98b, which is provided for engaging in a locking recess 100b of the further locking element 86b, which is in particular non-rotatably connected to the output spindle 16b (cf. also FIG. 7). The transverse extension 98b extends, in particular in an assembled state, preferably starting from a base body of the locking element 48b along a direction running at least substantially perpendicularly to the output axis 22b in the direction of the output spindle 16b. The transverse extension 98b preferably extends at least essentially parallel to a main extension plane of the base body of the locking element 48b. The main extension plane of the base body of the locking element 48b extends, in particular in an assembled state, at least essentially perpendicularly to the output axis 22b.

The tool receiving 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 (cf. also FIG. 7). The ramp-shaped gear element(s) 34b, 36b arranged on the locking element 48b is/are preferably provided to interact, in particular, with a ramp extension 102b, 104b of a further gear element 38b, 40b (cf. also FIG. 8) of the gear unit 32b to the fuse element 24b along at least one to move substantially parallel to the output axis 22b running direction of movement 44b of the securing element 24b. The securing element 24b can be moved as a function of an actuation of the actuation element 30b along the direction of movement 44b, which runs transversely to a direction of movement 46b of the locking unit 26b, along which the arresting element 48b of the arresting unit 26b can be moved as a function of an actuation of the actuation element 30b.

The transmission unit 32b preferably includes at least two further transmission elements 38b, 40b, which have an at least essentially analogous configuration. A description of one of the other gear elements 38b, 40b can preferably be read analogously to the other of the other gear elements 38b, 40b. The other gear element 38b, 40b is mounted translationally in a housing (not shown 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 transmission element 38b, 40b preferably interacts with an extension 42b arranged on the securing element 24b, in particular a circumferential collar, of the securing element 24b to move the securing element 24b as a function of actuation of the actuating element 30b. The other gear element 38b, 40b is preferably designed as a pull rod. The further gear element 38b, 40b preferably has a driver extension 106b arranged transversely, in particular at least essentially perpendicularly, to a longitudinal axis of the further gear element 38b, 40b (cf. also Figure 8), which is used to interact with the extension 42b arranged on the securing element 24b , in particular the peripheral collar, of the securing element 24b is provided. The further gear element 38b, 40b preferably includes the ramp extension 104b, which is intended 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, in particular at an end of the further gear element 38b, 40b facing away from the driving extension 106b of the further gear element 38b, 40b. The ramp extension 104b preferably comprises at least one ramp-shaped area, in particular one towards the longitudinal axis the other gear element 38b, 40b inclined contact surface. The ramp-shaped area of the ramp extension 104b is preferably designed to correspond to the ramp-shaped gear element 34b, 36b. In particular, the ramp-shaped area of the ramp extension 104b has a gradient that corresponds to the ramp-shaped gear element 34b 36b.

Tool receiving device 10b comprises at least one latching unit 50b, which secures actuating element 30b, quick-action clamping unit 18b and/or locking unit 26b in at least one actuated position, latching unit 50b being at least partially embodied in one piece with gear unit 32b. The latching unit 50b preferably comprises at least one latching element 90b, in particular at least two latching elements 90b, 108b (cf. also FIG. 7). The latching elements 90b, 108b have an at least essentially analogous configuration, so that a description of one of the two latching elements 90b, 108b can be read from the other of the latching elements 90b, 108b. The locking element 90b, 108b is preferably formed in one piece with the ramp-shaped gear element 34b, 36b. In particular, the latching element 90b, 108b is designed as a flat surface or as a recess which is directly connected to the ramp-shaped gear element 34b, 36b, in particular to the inclined plane. The ramp extension 104b preferably rests against the latching element 90b, 108b when the actuating element 30b is in a secured state. Preferably, as a result of the action of a spring force of a spring element 82b of the quick-action clamping unit 18b, the further gear element 38b, 40b, in particular the ramp extension 104b, is pressed in a secured state against the latching element 90b, 108b, whereby in particular a movement of the further gear element 38b, 40b and thereby the Actuating element 30b can be prevented. The other gear element 38b, 40b, in particular the ramp extension 104b, preferably comprises a flattened area, in particular a flat surface (cf. also FIG. 8), which is intended to interact with the latching element 90b, 108b. The flattened area is preferably arranged between two ramp-shaped areas of the further transmission element 38b, 40b, in particular of the ramp extension 104b. The latching element 90b, 108b is preferably designed in such a way that the secured position can be released by over-latching, in particular as a result of a movement of the latching element 90b, 108b counter to a latching movement direction. With regard to other features in the Figures 5 to 8 shown tool holding device 10b may in principle be referred to the description of the tool holding device 10a shown in Figures 1 to 4, which can be read essentially analogously to the tool holding device 10b shown in Figures 5 to 8.

FIG. 9 shows a schematic, perspective view of a further alternative tool receiving device 10c in a state dismantled from a portable power tool (not shown in detail here). The tool receiving device 10c can preferably be arranged in a portable machine tool, which is designed essentially analogously to the portable machine tool 12a described in the description of FIGS. The tool receiving device 10c comprises at least one output unit 14c, which comprises at least one output spindle 16c that can be driven in rotation, and at least one quick-action clamping unit 18c which is arranged on the output spindle 16c and which has at least one torque transmission element 20c connected to the output spindle 16c in a torque-proof manner (cf. also FIGS. 10 and 11) and at least one securing element 24c (cf. also FIGS. 10 and 11) which is secured in particular against movement axially along an output axis 22c of the output spindle 16c. The securing element 24c is movably mounted together with the output spindle 16c, in particular rotating about the output axis 22c. Furthermore, the tool receiving device 10c comprises at least one locking unit 26c (cf. FIG. 11, shown in broken lines) for securing the output spindle 16c against a rotational movement. However, it is also conceivable that the tool receiving device 10c is formed independently of the locking unit 26c. Furthermore, the tool holding device 10c comprises at least one actuating unit 28c, which has at least one, in particular movably mounted, actuating element 30c (represented only in phantom in Figures 9 and 10), by means of which the locking unit 26c and/or the quick-action clamping unit 18c can be actuated, in particular as a result of a movement of the actuating element 30c. The actuating element 30c is intended to actuate the quick-action clamping unit 18c, in particular the torque transmission element 20c, in particular as a result of a movement of the actuating element 30c. The tool holder device 10c shown in FIGS. 9 to 11 differs in particular from the exemplary embodiments described above in that partially Functions which, in the exemplary embodiments described above, the corresponding fuse element 24a; 24b are assigned, in the embodiment shown in Figures 9 to 11 are assigned to the torque transmission element 20c, such as the movable bearing relative to the output spindle 16c or the like.

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

The securing element 24c preferably comprises at least one axial securing extension 72c, 74c, 76c, 78c, in particular at least four axial securing extensions 72c, 74c, 76c, 78c (cf. also FIGS. 9 and 10). The axial securing extensions 72c, 74c, 76c, 78c are preferably distributed uniformly along the circumferential direction 70c of the quick-release unit 18c on the securing element 24c, in particular according to an n-fold symmetry. The axial securing extensions 72c, 74c, 76c, 78c cooperate with receiving recesses 120c, 122c of the torque transmission element 20c to clamp the insertion tool axially. The application tool, in particular a hub (not shown in detail here) of the application tool, is preferably in a state secured to the output spindle 16c by means of the quick-action clamping unit 18c, axially along a direction running at least substantially parallel to the output axis 22c between the axial securing extensions 72c, 74c, 76c, 78c and the torque transmission element 20c arranged, in particular arranged in the receiving recesses 120c, 122c. In a clamped state between the torque transmission element 20c and the axial securing projections 72c, 74c, 76c, 78c, the application tool, in particular the hub of the application tool, is in contact with the torque transmission projections 66c, 68c along the circumferential direction 70c. The receiving recesses 120c, 122c of the rotary Torque transmission element 20c are arranged in such a way that, viewed in a plane running at least substantially perpendicularly to the output axis 22c, they preferably form a cross with four legs, in particular of equal length, with the legs of the cross being conical when viewed from the outside inwards in the direction of the output axis 22c, in particular are triangular or teardrop-shaped. The securing element 24c, in particular the axial securing extensions 72c, 74c, 76c, 78c, are preferably also arranged in such a way that, viewed in the plane running at least substantially perpendicularly to the output axis 22c, they preferably have the shape of a cross with four legs, in particular of equal length form, the legs of the cross viewed from the outside inward running conically in the direction of the output axis 22c, in particular being triangular or teardrop-shaped. The application tool, in particular the hub of the application tool, has a configuration corresponding to the shape or the arrangement of the receiving recesses 120c, 122c and to the shape or the arrangement of the axial securing extensions 72c, 74c, 76c, 78c.

Torque transmission element 20c preferably has a contact edge 80c, in particular four contact edges 80c (only two contact edges 80c are shown in Figures 9 and 10), which is/are used to transmit torque when an insert tool is clamped by means of quick-action clamping unit 18c (not here). shown in more detail) on the application tool, in particular on a hub of the application tool rests / rest. Preferably, the contact edges 80c each delimit a step of the torque transmission element 20c, which run parallel to the clamping surfaces of the torque transmission element 20c. The contact edges 80c preferably delimit the torque transmission extensions 66c, 68c. In particular, the axial securing projections 72c, 74c, 76c, 78c at least essentially completely cover the receiving recesses 120c, 122c when the quick-action clamping unit 18c is in a closed state. In an open state of the quick-action clamping unit 18c, the axial securing extensions 72c, 74c, 76c, 78c at least essentially completely release the receiving recesses 120c, 122c, in particular to be able to arrange the insertion tool in the receiving recesses 120c, 122c. Preferably, the application tool, in particular in an open state of the quick-clamping unit 18c, when removed from the Quick-release unit 18c can be removed from the receiving recesses 120c, 122c simply by moving along an at least substantially parallel direction to the output axis 22c. The torque transmission element 20c is mounted on the output spindle 16c in a translationally movable manner, in particular along a direction running at least substantially parallel to the output axis 22c. In addition, the torque transmission element 20c is rotatably mounted along the circumferential direction 70c relative to the output spindle 16c and relative to the securing element 24c, in particular along a limited movement path. The quick-action clamping unit 18c preferably includes at least one spring element 82c for applying a spring force to the torque transmission element 20c, in particular a spring force acting along the output axis 22c, preferably in the direction of the securing element 24c.

Tool receiving device 10c preferably includes at least one transmission unit 32c (represented only by dashed lines in FIGS. 9 and 10), which is provided to convert a movement of actuating element 30c, in particular to actuate locking unit 26c, into a movement of torque transmission element 20c. The transmission unit 32c preferably comprises at least one, in particular ramp-shaped, transmission element (not shown in detail here, but designed analogously to the other exemplary embodiments), which is provided to convert a translatory or rotary movement of the actuating element 30c into a translatory 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 transmission unit 32c preferably comprises at least one, in particular another, transmission element (not shown in more detail here, but designed analogously to the other exemplary embodiments), which is provided with an extension 42c arranged on the torque transmission element 20c, in particular a circumferential collar (cf. FIGS. 9 to 11), interacts to a movement of the torque transmission element 20c depending on an actuation of the actuating element 30c. The, in particular further, transmission element is arranged without contact with the torque transmission element 20c in at least one operating state, in particular analogously to the other exemplary embodiments. Tool receiving device 10c preferably includes at least one guide unit 110c, which is provided to guide a movement of torque transmission element 20c and to limit a maximum movement distance, in particular at least a maximum twisting distance, of torque transmission element 20c relative to output spindle 16c. Guide unit 110c is preferably embodied as a link guide, with at least one link element 112c of guide unit 110c being arranged, in particular stationary, on output spindle 16c and at least one further link element 114c of guide unit 110c being arranged, in particular stationary, on torque transmission element 20c. Guide unit 110c is preferably provided for guiding an axial movement and a rotary movement of torque transmission element 20c relative to output spindle 16c. Torque transmission element 20c can preferably perform a stepped movement relative to output spindle 16c by means of guide unit 110c, such as an axial movement followed by a rotary movement or vice versa, or torque transmission element 20c can use guide unit 110c to perform a superimposed movement, such as superimposition of an axial movement and a Rotary movement, perform relative to the output spindle 16c. The torque transmission element 20c can be moved by the guide unit 110c, preferably relative to the securing element 24c, in particular in order to enable the quick-action clamping unit 18c to be transferred from an open state to a closed state or vice versa.

Guide unit 110c preferably has at least link element 112c, which is arranged in particular in a stationary manner on output spindle 16c and is connected to torque transmission element 20c to drive torque transmission element 20c in rotation. Guide unit 110c preferably includes at least one, in particular further, link element 114c, which has at least two guideway sections 116c, 118c running transversely to one another, in particular an axially running guideway section 116c and a circumferential guideway section 118c. Link element 112c is preferably designed as a bolt which is connected in a torque-proof manner to output spindle 16c. However, it is also conceivable that the backdrop element 112c has a different configuration that appears sensible to a person skilled in the art, such as a configuration as an extension, a groove, a web, a thread or the like in the case of an embodiment of link element 112c as a bolt. Link element 112c preferably extends transversely through output spindle 16c, in particular at least as far as securing element 24c or beyond securing element 24c into torque transmission element 20c, in particular into further link element 114c arranged on torque transmission element 20c. Link element 112c can protrude beyond output spindle 16c on one side, on two sides, or on more than one side. The securing element 24c is preferably connected in a torque-proof manner to the output spindle 16c by means of the link element 112c. In particular, securing element 24c is secured axially along output shaft 22c on output spindle 16c by link element 112c. The other link element 114c is preferably designed as a guide groove. The link element 112c preferably engages in the further link element 114c. Preferably, the guide unit 110c comprises two further gate elements 114c which are arranged mirror-symmetrically on the torque transmission element 20c and are each designed as a guide groove. The link element 112c preferably engages in both further link elements 114c. The torque transmission element 20c is preferably non-rotatably connected to the output spindle 16c by means of an interaction of the link element 112c and the further link element 114c/the further link elements 114c, at least in the closed state of the quick-action clamping unit 18c. With regard to further features of the tool holding device 10c shown in Figures 9 to 11, reference may be made to the description of the tool holding device 10a shown in Figures 1 to 4, which can be read essentially analogously to the tool holding device 10c shown in Figures 9 to 11.

Claims

- 42 - Claims

1. Tool holding device for a portable machine tool, in particular an angle grinder, with at least one output unit (14a; 14b; 14c) which comprises at least one rotary driveable output spindle (16a; 16b; 16c), with at least one on the output spindle (16a; 16b; 16c ) arranged quick-clamping unit (18a; 18b; 18c), which has at least one torque transmission element (20a; 20b; 20c) connected, in particular in a torque-proof manner, to the output spindle (16a; 16b; 16c) and at least one, in particular axially along an output axis (22a; 22b ; 22c) of the output spindle (16a; 16b; 16c) movably mounted securing element (24a; 24b; 24c), with at least one locking unit (26a; 26b; 26c) for securing the output spindle (16a; 16b; 16c) against a rotary movement, and with at least one actuating unit (28a; 28b; 28c) which has at least one, in particular movably mounted, actuating element (30a; 30b; 30c), by means of which the locking unit (26a; 26b; 26c) can be actuated, in particular as a result of a movement of the actuating element (30a; 30b; 30c), characterized in that the actuating element (30a; 30b; 30c) is provided for this purpose, in particular as a result of a movement of the actuating element (30a; 30b; 30c), to actuate 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 holder device according to claim 1, characterized by at least one gear unit (32a; 32b; 32c), which is provided to convert a movement of the actuating element (30a; 30b; 30c) into an actuation of the locking unit (26a; 26b; 26c) in a To convert movement of the securing element (24a; 24b) or the torque transmission element (20c). - 43 - Tool holding device according to Claim 1 or 2, characterized by at least one gear unit (32a; 32b) which has at least one, in particular ramp-shaped, gear element (34a; 34b, 36b) which is provided for a translatory or rotary 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). Tool holding 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 is connected to an extension (42a; 42a; 24b) arranged on the securing element (24a; 24b). 42b), in particular the peripheral collar, to move the securing element (24a; 24b) as a function of actuation of the actuating element (30a; 30b). Tool holder 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) as a function of actuation of the actuating element (30a; 30b), wherein the transmission element (34a; 38b, 40b) is arranged without contact with the securing element (24a; 24b) in at least one operating state. Tool holder device according to one of the preceding claims, characterized in that the securing element (24b) is movable in dependence on an actuation of the actuating element (30b) along a direction of movement (44b) which runs transversely to a direction of movement (46b) of the locking unit (26b), along which a locking element (48b) of the locking unit (26b) can be moved as a function of actuation of the actuating element (30b). - 44 - Tool holder device according to one of the preceding claims, characterized by at least one gear unit (32b) which has at least one, in particular ramp-shaped, gear element (34b, 36b) which 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). Tool holder 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 . Tool holder 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 locking unit (50a; 50b) is at least partially integral with the gear unit (32a; 32b) is formed. Tool holder device according to one of the preceding claims, characterized by at least one guide unit (110c) which is used to guide a movement of the torque transmission element (20c) and to limit a maximum movement distance, in particular at least a maximum twisting distance, of the torque transmission element (20c) relative to the output spindle ( 16c) is provided. Tool receiving device according to Claim 10, characterized in that the guide unit (110c) is designed as a link guide, with at least one link element (112c) of the guide unit (110c) being arranged, in particular stationary, on the output spindle (16c) and at least one further link element (114c ) of the guide unit (110c), in particular stationary, is arranged on the torque transmission element (20c). Tool holder device according to Claim 10 or 11, characterized in that the guide unit (110c) has at least one link element (112c), which is arranged in particular in a stationary manner on the output spindle (16c) and which is used to drive the torque transmission element (20c) in rotation with the torque transmission element (20c). connected is. 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, link element (114c) which has at least two guide track sections (116c, 118c) running transversely to one another, in particular an axially running guide track section ( 116c) and a peripheral guide track section (118c). Portable machine tool, in particular an angle grinder, with at least one tool receiving device according to one of the preceding claims.