Quick chuck device and handheld machine tool

Abstract

The invention relates to a quick chuck device for mounting an attachment (17) on a handheld machine tool (13), in particular an angle grinder, which comprises a driven unit (33) for moving the attachment (17) about its driven axis (A), and a holding unit (37) for holding the attachment (17) on the handheld machine tool (13), in particular with a holding element (39). It is proposed that the holding unit (37) has holding parameters which change in a holding state, in particular when transitioning from the holding state to a clamping state.

Description

[Technical field]

[0001] The invention relates to a quick chuck device as claimed in the preamble of claim 1. [Background technology]

[0002] Patent document 1 relates to a power-driven hand-held tool having a housing, a spindle head and a tool spindle which can be driven, in particular in a rotary-oscillating manner, about the longitudinal axis of the spindle head, the tool spindle having a tool-side end with a neck section for the tool to be driven, a clamping device and a fixing member, the clamping device having a clamping arrangement and a release arrangement, in which the tool can be fixed to the tool spindle by means of the fixing member in the clamping arrangement and in which the tool can be released in the release arrangement, the clamping device being switchable between the clamping and release arrangements by an adjustment movement directed in the same direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] DE 102012007926 A1 Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE DISCLOSURE The object of the present invention is to improve the quick chuck device by simple constructional measures. [Means for solving the problem]

[0005] This problem is solved by a quick chuck device for positioning an attachment on a hand-held machine tool, in particular an angle grinder, which has a driven unit provided for moving the attachment around a driven axis A of the driven unit and a holding unit, in particular with a holding member, provided for holding the attachment on the hand-held machine tool.

[0006] Preferably, the holding unit has holding parameters which change in the holding state, in particular when passing from the holding state to the clamping state.

[0007] The holding unit is adjustable so that the holding parameters can be changed in the holding state, in particular during the transition of the holding unit from the holding state to the clamping state.

[0008] The quick chuck device of the present invention allows attachments to be received and held particularly reliably and quickly on handheld machine tools. Particularly preferably, attachments having receiving areas of different thicknesses can be received and clamped reliably. It is also ensured that attachments having different thicknesses can be held by the quick chuck device with approximately uniform clamping force in each case.

[0009] Furthermore, a particularly high level of operating comfort is achieved by the possibility of simple mounting and / or dismounting of the accessory on the quick-chuck device or on the hand-held machine tool, and the accessory can be mounted on the quick-chuck device and dismounted again in a particularly time-saving manner, without having to give up a secure reception of the accessory.

[0010] Furthermore, the attachment device can be held particularly securely with a quick chuck device, so that the attachment device is held against being removed independently and / or unintentionally.

[0011] By changing the holding parameters, the accessory can be shifted from the holding state to the tightened state in a particularly simple manner. The holding parameters of the holding unit can be provided for shifting the holding unit from the release state to the holding state, for example by a rotational movement, in particular for holding the accessory on a quick-chuck device or a hand-held machine tool. Furthermore, the holding parameters of the holding unit can be provided for making it possible to shift the holding unit from the holding state to the tightened state, for example by a translational movement along the driven axis, in particular for clamping the accessory on a quick-chuck device or a hand-held machine tool. Particularly preferably, a separation of functions is obtained by shifting the holding unit from the release state to the holding state in order to hold the accessory on the quick-chuck device or the hand-held machine tool in a form-locking manner, and by shifting the holding unit from the holding state to the tightened state in order to clamp the accessory, in particular along the driven axis. By changing the holding parameters of the holding unit in the holding state, the direction of movement of the holding unit, in particular of the holding element, is changed.

[0012] Holding parameters may be understood to be, in particular, degrees of freedom of movement, which preferably form a plurality of movement possibilities independent of one another in a mechanical sense. The holding parameters may define a movement, in particular a direction of movement, of at least one holding element. The holding parameters may define a rotational movement about a driven axis. The holding parameters may define a translational movement along the driven axis. A change in the holding parameters occurs, for example, by blocking or stopping the rotational movement about the driven axis and / or by releasing or starting the translational movement along the driven axis. In a preferred manner, the holding unit is provided for controlling a change in the holding movement, in particular the holding movement of the holding unit, in particular during the transition from the holding state to the clamping state. In particular, the holding parameters change during the transition from the holding state to the clamping state.

[0013] The holding unit may be provided for holding the accessory device to the quick-chuck device or to the hand-held machine tool in a form-locking and / or friction-locking manner.

[0014] The holding unit may have at least two elements which are supported so as to be movable relative to one another in at least one state. The two elements may be arranged opposite one another so that the accessory is held axially on the quick-chuck device. The two elements may be provided for transmitting a clamping force to the accessory by means of a clamping unit. The clamping force preferably corresponds at least to a holding force determined for holding the accessory on the quick-chuck device or on one operating state of the hand-held machine tool on the quick-chuck device. The two elements may be supported so as to be movable axially opposite one another along the driven axis in order to clamp the accessory axially. The holding unit may have a holding element which may be provided for engaging through a recess of the accessory, in particular on the accessory, and for holding the accessory in a positive-locking and / or friction-locking manner on the quick-chuck device or on the driven unit. The holding element may have holding wings which extend radially outwardly relative to the driven axis in a suitable manner. The holding element may be supported axially movable along the driven axis for fastening or unlocking the accessory by axial movement. The holding element may have a holding contour that corresponds generally to the receiving contour of the receiving recess of the accessory, in particular to the receiving contour of the receiving recess. The holding contour may be surrounded by a contour of the holding wing. The holding contour may be configured generally corresponding to the receiving contour. The holding contour may be configured smaller than the receiving contour. The holding element may be configured such that the holding contour fits snugly into the receiving contour so that the holding element can be inserted through the receiving recess of the accessory. The holding element may be provided for holding the accessory by through-engagement of the receiving recess of the accessory with the holding wing. In particular, the holding element is rotated relative to the receiving recess so that the holding wing forms a positive lock with the accessory. The retaining contour can be aligned relative to the receiving contour such that in a first rotational position the retaining contour overlaps the receiving contour, thereby allowing the retaining member to be inserted through the receiving notch, and when rotated about the driven axis to a second rotational position the retaining contour overlaps the receiving contour of the receiving notch.

[0015] In a preferred embodiment, the driven unit is provided for transmitting a rotational and / or vibrational movement about a driven axis to an auxiliary device held on the driven unit by the holding unit. In a preferred embodiment, the driven unit is connected to a drive unit of the hand-held machine tool in a manner and 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 driven unit has at least one sleeve and / or at least one hollow shaft, in particular a hollow spindle. The rotational and / or vibrational movement of the driven unit can be produced in a preferred embodiment by cooperation of the drive unit of the hand-held machine tool with at least one electric motor and the driven unit. In particular, the holding part is permanently attached. This may in particular be understood as meaning that the component, in particular the holding element, is non-releasably arranged on at least one further component, in particular the driven unit, and / or is preferably inseparable from the driven unit, in particular in the normal functional and / or operable state, in particular in the released state (stress-relieved state) of the quick-chuck device and in the clamped state (clamped state) of the quick-chuck device. In a preferred manner, the holding element is non-releasably arranged on the driven unit. In particular, the holding element non-releasably arranged on the driven unit and / or the respective further component non-releasably arranged on the driven unit is non-releasably connected to the driven unit, in particular in the open and / or closed state of the quick-chuck device. In particular, the holding element can be inserted into the accessory tool depending on the rotational position of the holding element, and when the rotational position is changed, forms a positive lock with the accessory, in particular in the axial direction along the driven axis. The "released state" of the quick-chuck device may be interpreted as a state of the quick-chuck device that is provided in particular for releasing an attachment device that is placed on the quick-chuck device for removal and / or for releasing the quick-chuck device for mounting an attachment device on the quick-chuck device. The released state may form the bottom dead center of the quick-chuck device.The "holding state" of the quick chuck device may in particular be interpreted as a state of the quick chuck device in which the attachment is held in a form-locking manner on the quick chuck device or on the driven unit of the handheld machine tool and is fixed in a suitable manner so as not to come loose. The "clamping state" of the quick chuck device may in particular be interpreted as a state of the quick chuck device in which the attachment is displaced in a suitable manner by a clamping movement into a fixed state on the driven unit and / or is operably fixed on the driven unit. The clamping state may form the top dead center of the quick chuck device, in which the attachment is in a clamped and fixed state on the driven unit. In a suitable manner, the attachment can be operably fixed on the driven unit and / or in particular the attachment cannot be removed from the driven unit without being destroyed. In particular, the holding state may include a clamping state. In particular, the clamping state may form a special shape of the holding state, whereby the holding state also includes the function of holding the attachment. The holding element is provided for generating a frictional and / or positive locking for holding the accessory, in particular a grinding disk, on the quick-chuck device, in particular in the clamping state of the quick-chuck device. In particular, the clamping state may be interpreted as the quick-chuck device generating a clamping movement for generating a frictional and / or positive locking for holding the accessory. In a preferred manner, the holding element generates a positive locking, in particular in the axial direction, preferably by pressing at least one part of the accessory against at least one part of the driven unit. It is conceivable that the holding element generates a positive locking, in particular in the radial direction and / or in the circumferential direction, in addition to the axial positive locking, where the circumferential direction lies in a plane whose surface normal extends parallel to the driven axis. In particular, the accessory is fixed to the quick-chuck device without tools. "Tool-free fixability" may be interpreted as meaning that the process of placing the accessory device on the quick-chuck device and / or switching between the released and tightened states is possible without the use of external tools, such as a spanner, hex wrench, etc.The holding member is supported in particular in relation to the driven unit so as to be movable, in particular axially, in translation along the driven axis and / or rotatably about the driven axis, in which case the axis of movement, in particular the axis of rotation, of the holding member preferably coincides at least approximately with the driven axis. The driven unit grips the holding member at least partially, in particular along a circumferential direction lying in a plane with a surface normal extending at least approximately parallel to the driven axis. In a preferred form, the driven unit has a hollow shaft for at least partially receiving the holding member. In particular, such a type of quick chuck device is preferably designed compactly, whereby the mounting of small mounting tools, in particular with a diameter of 100 mm or less, is possible.

[0016] The attachment device may be configured as a grinding disc and / or a cutting disc.

[0017] The dependent claims provide further preferred embodiments of the quick chuck device according to the invention.

[0018] Preferably, the holding unit, in particular the holding member, is supported rotatably about the driven axis in the holding state and / or in one clamping state / MultipleIn the clamping state, the holding unit is supported so as to be movable approximately along the driven axis. Furthermore, the holding unit, in particular the holding member, preferably has a clamping state, in which the holding member is supported so as to be movable approximately along the driven axis. In the holding state, the holding unit may be supported so as to be rotatable about the driven axis and / or so as to be movable along the driven axis. In the clamping state, the holding unit may be supported so as to be movable about the driven axis and / or so as to be movable along the driven axis. In particular, the holding unit may be supported in the holding state or in the clamping state so as to be non-rotatable about the driven axis or may be supported stationarily along the driven axis. The separation of functions is achieved, for example, by the holding member being supported so as to be rotatable about the driven axis in the holding state or being supported so as to be rotatable about the driven axis and movable in translation along the driven axis. The separation of the functions can furthermore be achieved by the holding unit being supported for translational movement along the driven axis, for example in a clamped state, or for translational movement along the driven axis and for rotational movement about the driven axis. In this case, the change in the holding parameters is effected by a change in the degree of freedom of the holding unit, in particular the holding element, for example by blocking the rotational movement and releasing the translational movement. Preferably, in the holding state of the holding unit, the movement of the holding element along the driven axis, in particular the movement of the holding element relative to the spindle element, is blocked. The holding element can be supported for movement about the driven axis from the released state until the holding state is passed to the clamped state or until the clamped state. The holding element can be supported for movement along the driven axis in a clamped state.

[0019] Furthermore, preferably, movement of the holding member is blocked, in particular movement of the holding member relative to the spindle member about the driven axis in the clamped state of the holding unit. The holding member may be supported so as to be movable along the driven axis from the released state until the holding state passes to the clamped state or until the clamped state. The holding member may be supported so as to be movable about the driven axis in the holding state.

[0020] In a preferred embodiment, the holding member is movably supported relative to the spindle member in order to shift the quick chuck device from the released state to the clamped state.

[0021] This ensures that movements necessary for the functioning of the respective state are released and movements that are unnecessary or not necessarily required are blocked.

[0022] To fix the accessory device, the holding unit, in particular the holding member, can be rotated around the driven axis by a predefined angle from a released state (bottom dead center) to a clamped, clamped state (top dead center). This angle has a range of 0° to 25°, in particular up to 30°, preferably up to 40°, advantageously up to 50°, particularly advantageously up to 55°, more advantageously up to 60°, even more advantageously up to 65°. For example, this angle preferably has a range of 0° to 40° with a tolerance of +20° to -10°. For example, this angle has a range of 0° to 32° with a tolerance of + / -8°. For example, this angle preferably has a range of 0° to 48° with a tolerance of + / -16°.

[0023] The holding unit preferably has a holding element which is provided for through-engagement and clamping of the accessory. The holding element can extend through the accessory, particularly in the release state, and can be rotated relative to the accessory in the holding state, particularly by a rotational movement about the driven axis, for example, in order to hold the accessory in a form-locking manner. The holding element preferably has holding wings which extend radially relative to the driven axis. The holding wings can be provided for gripping the accessory at least in gradient sections. The holding wings can be provided for applying a clamping force to the accessory. The holding wings can have holding surfaces which can extend along a radial plane of the driven axis. This allows the accessory to be connected to the quick chuck device, particularly to the driven unit, in a particularly simple and reliable manner.

[0024] More preferably, the holding unit is provided for shifting the auxiliary device from a released state to a held or clamped state by a rotational movement of the holding unit, in particular the holding member, relative to the spindle member about the driven axis A.

[0025] More preferably, the clamping device has a clamping unit, in particular a clamping member, which is provided for moving the holding unit, in particular the holding member, in the axial direction along the driven axis A. The clamping unit may be coupled to the holding unit. The clamping unit may be provided for axially defining the auxiliary device by the holding unit, in particular for displacing it from a holding state to a clamped state.

[0026] The clamping unit may be provided for transmitting a clamping force to the auxiliary device in the axial direction, in particular along the driven axis. The clamping unit may have a clamping member, which is provided for controlling an axial movement of the holding unit, in particular of the holding member. The clamping unit may be provided for clamping the auxiliary device in the axial direction along the driven axis, in particular by a movement of the clamping member or a rotational movement about the driven axis.

[0027] The clamping unit may have a further clamping member, which is provided for indirect or direct cooperation with the clamping member. The clamping member and the further clamping member may form a thread or a ramp, which is provided for transmitting the clamping force, in particular axially along the driven axis, to the accessory device. The further clamping member may be movably supported relative to the clamping member. The further clamping member may be configured on a further member of the clamping unit.

[0028] Furthermore, the clamping unit preferably has a gradient element, in particular configured as a threaded element or as a ramp-type element. A gradient element may be understood as an element having a gradient around the driven axis, in particular in the circumferential direction. For example, the gradient element may form a thread or a threaded section. The gradient element may be configured as a wedge-shaped element. The gradient element may be provided, for example, to replace a movement along the gradient element or a circumferential movement about the driven axis with a lateral movement, in particular perpendicular to the gradient element, or an axial movement along the driven axis. The gradient element may have a varying gradient or a constant gradient. The gradient element may have a monotonically, in particular highly monotonically, rising configuration.

[0029] The clamping unit may have only one gradient element or several gradient elements. The gradient elements are connected to one another in the circumferential direction. The gradient elements may be arranged next to one another in the circumferential direction. The gradient elements may be arranged parallel to one another. The gradient elements may be spaced apart from one another in the circumferential direction. The gradient elements may extend radially relative to the driven axis and / or be delimited by two radial planes arranged parallel to one another. In particular, the two radial planes may each delimit a first gradient element. In a preferred manner, the spacing between the two radial planes is delimited by the maximum axial length of the gradient element(s) or of one gradient section of the gradient element / s. The two radial planes may have a spacing from one another that corresponds to a maximum axial movement of the holding element from the released state to the clamped state, approximately along the driven axis.

[0030] Furthermore, the gradient element preferably has a first gradient section and a second gradient section that is angled relative to the first gradient section. The first gradient section may extend in a radial plane of the driven axis. The first gradient section may be configured flat. The first gradient section preferably has no gradient in the circumferential direction about the driven axis. The first gradient section may extend, in particular, completely along the radial plane of the driven axis. It is conceivable that the first gradient section is angled relative to the radial plane of the driven axis. The second gradient section may be angled relative to the radial plane of the driven axis. By means of the gradient element, in particular by means of the first gradient section and the second gradient section of the gradient element, a holding parameter of the holding unit is changed.

[0031] Furthermore, the clamping unit may preferably have a further gradient element, in particular configured as a threaded element or a ramp-type element. This further gradient element may be arranged correspondingly to the gradient element. The further gradient element may be configured generally similarly to the gradient element. The further gradient element may be provided for indirect or direct cooperation with the gradient element. The further gradient element may be provided for contact with the gradient element. The further gradient element may be supported so as to be movable relative to the gradient element in a circumferential direction about the driven axis and / or in an axial direction along the driven axis. The further gradient element may be provided for slidable support relative to the gradient element.

[0032] The gradient member and the further gradient member may form a thread or a ramp.

[0033] The gradient member may be arranged on the fastening member. The gradient member may be configured integrally with the fastening member. The further gradient member may be arranged on another fastening member. The further gradient member may be configured integrally with another fastening member. This allows the desired fastening force to be appropriately adjusted.

[0034] The fastening member is preferably designed integrally with the holding member. The fastening member may be designed as a separate fastening ring connected to the holding member. The fastening member may separate the holding member radially with respect to the driven axis. The fastening member may be designed integrally with the holding member. The fastening member may surround the holding member 360° in at least one plane. The fastening member may be arranged concentrically with respect to the holding member. The fastening member may be arranged on the holding member. The fastening member may be designed as a separate component that can be connected to the holding member in a manner that is in particular non-rotatable. The fastening member may be designed as a separate component that is connected to the holding member by means of fastening means, such as, for example, a fastening screw. The fastening member may be designed in the form of a disk. The fastening member may be rigidly connected to the holding member, so that relative movements (rotational movements, translational movements) of the two elements are prevented. The fastening member may be connected to the holding member in a manner that is non-rotatable. The clamping member may be provided for clamping the holding unit by a relative rotational movement of the clamping member relative to another member, for example another clamping member of the clamping unit. The clamping member may be arranged on the side of the holding member opposite the accessory device. The clamping member may delimit the axial length of the holding member along the driven axis. This allows the clamping unit to be constructed particularly compactly.

[0035] It is further preferred that the quick chuck device, in particular the holding unit, has a clamping member, which is provided for cooperating with the holding member, in particular by means of the clamping unit. The spindle member may be provided for driving the auxiliary device about the driven axis. The spindle member may be in direct or indirect contact with the auxiliary device. The spindle member may have a support member, in particular a support surface, which is used for axially supporting the auxiliary device along the driven axis. The spindle member may be configured as a spindle sleeve. The spindle member may surround the holding member 360° in one plane. The spindle member may be provided for supporting the auxiliary device in a non-rotatable manner in the circumferential direction about the driven axis, at least in the clamped state.

[0036] The spindle member may have a further fastening member arranged corresponding to the fastening member. The further fastening member may be configured integrally with the spindle member. The further fastening member may be configured as a threaded member or as an angled member. The further fastening member may delimit a radial length of the spindle member.

[0037] The holding unit, in particular the spindle member, may have a link member provided for driving the accessory or for rotating it, in particular about a driven axis. This link member may be configured as a rotary link member. The link member may be provided for gripping the accessory and / or forming a positive fastening with the accessory.

[0038] Furthermore, the quick chuck device preferably has a cam transmission, which is provided for moving the holding unit, in particular the holding member, in a rotational direction about the driven axis. The cam transmission may be provided for reciprocating the holding unit, in particular the holding member, between two end positions. In particular, one of the end positions may be a position that can be fixed, preferably by a fixing unit. In particular, a favorable force transmission and / or force transformation is obtained. Advantageously, user-friendliness is increased, in that particularly simple user operations, for example switch button touches and / or lever adjustments, can be converted into complex movements, for example rotational movements, of the holding member. In particular, the cam transmission is provided for converting, at least partially, a linear movement of the unlocking pin of the quick chuck device into a rotational movement, in particular of the fixing member. An "end position" may be interpreted as a position in an open state and / or a position in a closed state. A "position that can be fixed by a fixing unit" may be interpreted as a position that is in an open state. Preferably, the "cam transmission" is provided for converting a linear motion into a motion at least partially different from a linear motion, for example a rotary motion, or for converting a motion at least partially different from a linear motion into a linear motion.

[0039] Furthermore, the cam gear preferably has a guide unit, which is provided for controlling the movement, in particular the rotational movement, of the holding unit, in particular the holding member, relative to the spindle member. The guide unit has a guide recess, which is provided for axially guiding the tension pin, in particular along the driven axis. The guide recess may have a curved path with a curved shape relative to the driven axis. The tension pin may be guided in the guide recess such that it controls the tension unit or the holding unit. In particular, a suitable force transmission and / or force transformation is obtained. A movement of the component relative to the driven unit can preferably be forced by means of a cam gear of this type. The guide unit has a number of guide recesses, which may in particular have a straight, helical or other curved shape.

[0040] The cam transmission may have several cam transmission members. The cam transmission members may each have a guide recess. The guide recesses may be provided for guiding a tensioning pin. The guide recesses may be provided for controlling the rotational movement of the holding unit about the driven axis. The movements of the cam transmission members may be coupled by means of the guide recesses.

[0041] In particular, the cooperation of the guide unit and the clamping unit allows the holding unit to be controlled in particular from a released state to a clamping state, preferably from a holding state to a clamping state.

[0042] The clamping unit preferably has a further gradient element, in particular configured as a threaded element or as a ramp element. The further gradient element may be configured at a distance from the gradient element. The further gradient element may be configured as a threaded element.

[0043] The further gradient member may be disposed on the preload member. The further gradient member may be integral with the preload member. The further gradient member may surround the preload member, particularly 360° in one plane.

[0044] Preferably, the quick chuck device has a preload member arranged for controlling the holding parameters of the holding unit. The preload member is arranged for cooperating with the holding unit, in particular with the holding member and the spindle member. The preload member may have a clamping member / another clamping member. The preload member may have a gradient member / another gradient member, in particular configured as a threaded member or a ramp member.

[0045] The clamping member can ensure a particularly reliable and rapid fixation of the accessory device to the holding unit. In particular, the holding parameters can be particularly reliably controlled by the cam gear and the clamping unit. In particular, the combination of the cam gear and the clamping unit results in a tailored adjustability of the holding unit.

[0046] Preferably, the translational movement of the holding unit, in particular the holding member, along the driven axis from the transition from the holding state to the clamped state to the clamped state is greater than the translational movement from the release state to the transition from the holding state to the clamped state of the holding unit. In a preferred manner, the translational movement of the holding unit between the release state and the clamped state can be interrupted and released in the clamped state. In this context, movement can be understood in particular as a movement of the holding unit, in particular a movement of the holding member relative to the spindle member. During the movement from the release state to the transition from the holding state to the clamped state, the holding member can be moved by only a rotational movement such that the accessory tool is held on the hand-held machine tool. This results in a particularly secure holding and clamping of the accessory device.

[0047] Furthermore, preferably, the rotational movement of the holding member about the driven axis from the release state until the holding state transitions to the tightened state is greater than the rotational movement from the holding state transitions to the tightened state until the holding unit is clamped. In a preferred embodiment, the rotational movement of the holding member can be interrupted in the tightened state and released from the release state until the holding state transitions to the tightened state.

[0048] The preload element preferably surrounds the holding element, in particular in a circumferential direction about the driven axis. Furthermore, the preload element may preferably be configured as an approximately hollow cylinder. The preload element may form a preload sleeve. The preload element may be movably supported relative to the holding element and / or the spindle element, in particular in the holding state. The preload element may be axially preloaded relative to the holding element. The preload element may be arranged on the holding element. The preload element may be surrounded by the spindle element. The preload element may be configured non-rotatably relative to the holding element. The preload element may be circumferentially preloaded relative to the spindle element about the driven axis. The preload element has a main extension line that extends along the driven axis. By means of the preload element, the holding parameters of the holding unit can be controlled in a particularly preferred manner. Furthermore, a separation of functions is obtained in that the preload element biases the holding element, on the one hand, particularly by a rotational movement, from the release state to the holding state, and, on the other hand, on the other hand, particularly by a translational movement, from the holding state to the clamping state.

[0049] Preferably, the holding unit has a spindle member and a holding member, in which case the preload member is arranged between the spindle member and the holding member. The preload member may surround the holding member. The preload member may be surrounded by the spindle member. The preload member may be arranged concentrically with respect to the spindle member and / or the holding member. This allows a particularly compact quick chuck device to be constructed.

[0050] Furthermore, preferably, a preload member is connected to the holding member and the spindle member. The preload member may be provided for cooperating with the spindle member and the holding member. The preload member may be provided for clamping the holding unit in a clamping state axially along the driven axis A relative to the spindle unit. Furthermore, preferably, the quick chuck device has a clamping member, which is provided for moving the holding unit, in particular the holding member, in the axial direction along the driven axis A. The clamping member may have a threaded member or an inclined member. The preload member may have a clamping member corresponding to the clamping member. The corresponding clamping member may be configured integrally with the preload member. The corresponding clamping member may be configured as a threaded member, in particular an internal thread and / or an inclined member. The corresponding clamping member may space the preload member radially relative to the driven axis and / or axially along the driven axis.

[0051] Furthermore, the preload member preferably has a further fastening member which is configured integrally with the preload member. The further fastening member may have a threaded member, in particular an external thread or a ramp-type member. The further fastening member may be connected to the spindle member. The spindle member may have a further fastening member which corresponds to the further fastening member. The corresponding further fastening member may be configured integrally with the spindle member. The corresponding further fastening member may be configured as a threaded member, in particular an internal thread. The corresponding further fastening member may separate the spindle member radially with respect to the driven axis and / or axially along the driven axis. This allows a particularly simple connection of the holding member and the spindle member.

[0052] It is further proposed that the quick chuck device has a spring element, which is provided for biasing the clamping unit, in particular the holding element, towards the preload element and / or the spindle element. The spring element may be configured as a tension / compression spring. The spring element may be configured as a torsion spring. The spring element surrounds the holding element 360° in one plane. The spring element may be provided for displacing the hand-held machine tool into the clamped state. This provides a particularly simple reset. This provides a uniform biasing force.

[0053] The quick chuck device may have a spring member arranged to bias the holding member in the released state towards the preload member and / or the spindle member. The spring member may be configured as a tension / compression spring. The spring member may be supported in a hollow space of the holding member. The spring member may be arranged to bias the clamping pin or the unlocking pin. The spring member may be preloaded more strongly in the released state than in the clamped state.

[0054] The quick chuck device may have a further spring member provided for biasing the preload member in a circumferential direction about the driven axis towards the spindle member. This further spring member may be configured as a torsion spring. The torsion spring may surround the holding member 360° in one plane. The further spring member may be provided for clamping the preload member against the spindle member in a clamped state. In the clamped state, the further spring member may be clamped as strongly as in the released state. The torsion spring may be preloaded or stress-relieved against the spindle member depending on the rotational movement of the holding member.

[0055] The preload member may be preloaded in the clamping state axially along the driven axis or circumferentially about the driven axis by a spring member, in particular a torsion spring, and preferably is preloaded in the release state and / or the retention state and / or the clamping state circumferentially about the driven axis by a spring member, in particular a torsion spring.

[0056] The invention further relates to a hand-held machine tool, in particular an angle grinder, equipped with a quick chuck device for operating an accessory device. [Brief description of the drawings]

[0057] [Figure 1] 1 is a perspective view of a handheld machine tool having a quick chuck device according to the present invention; [Diagram 2] FIG. 1 is a cross-sectional view of a handheld machine tool. [Diagram 3] FIG. 1 is a cross-sectional view of a handheld machine tool. [Figure 4] 1A to 1C are diagrams showing two states of a quick chuck device. [Diagram 5] FIG. 2 is a cross-sectional view of a quick chuck device. [Figure 6] FIG. 6 is an exploded view of the quick chuck device shown in FIG. 5. [Figure 7] FIG. 2 is a diagram showing one state of the quick chuck device. [Figure 8] FIG. 13 is a diagram showing another state of the quick chuck device. [Figure 9] FIG. 13 is a diagram showing another state of the quick chuck device. [Figure 10] FIG. 13 shows an alternative embodiment of the quick chuck device. [Figure 11] FIG. 13 shows an alternative embodiment of the quick chuck device. [Figure 12] FIG. 13 shows an alternative embodiment of the quick chuck device. [Figure 13] FIG. 13 shows an alternative embodiment of the quick chuck device. [Figure 14]FIG. 13 shows an alternative embodiment of the quick chuck device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0058] Further advantages are described in the following description of the drawings, in which several embodiments of the invention are shown. The drawings, the specification and the claims include many combinations of features, which the skilled person may regard as separate in a suitable form or may combine in other meaningful combinations.

[0059] In the following drawings, the same components are labeled with the same reference numerals.

[0060] FIG. 1 shows a machine tool system with a handheld machine tool 13 with a housing 15 and an attachment 17. The handheld machine tool 13 is configured as an angle grinder. The attachment 17 is configured as a grinding disc and / or as a cutting disc. The attachment 17 has a connection device 19 (FIG. 14 3. The connecting device 19 is configured as a through receiving recess 21.

[0061] The handheld machine tool 13 has a quick chuck device 23, which is provided for positioning the attachment device 17 on the handheld machine tool 13. The handheld machine tool 13 has an operating means 25 for opening and closing the quick chuck device 23. The operating means 25 is a tension lever. And The tension lever is Uh The operating means 25 has an eccentric body 27. The operating means 25 is provided to move an unlocking pin 29 (see Figs. 2 and 3) of the quick chuck device 23 in the axial direction, particularly by means of the eccentric body 27. The unlocking pin 29 is a locking pin that is movable in the axial direction by the machine tool. 13 The lock release pin 29 is provided to unlock the quick chuck device 23 when the quick chuck device 23 moves into the housing 15 of the machine tool. When the quick chuck device 23 is locked, the lock release pin 29 is 13The operating means 25 shown in FIG. 1 is in a closed state. 13 The auxiliary device 17 has a drive unit 31, which is provided for providing kinetic energy for moving, in particular for rotating, the auxiliary device 17. The drive unit 31 is arranged in the housing 15. The drive unit 31 is configured as an electric motor, in particular as an EC motor.

[0062] The quick chuck device 23 comprises a driven unit 33 for moving the attachment 17 about a driven axis A of the driven unit 33. The drive unit 31 drives the driven unit 33 for moving the attachment 17 about the driven axis A. The driven unit 33 is provided for transmitting a rotational and / or vibration movement about the driven axis A to the attachment 17 held in the driven unit 33 by a holding unit 37. The driven unit 33 is operatively connected to the drive unit 31 via a drive pinion. The driven unit 33 comprises a spindle member 47 configured as a hollow shaft, in particular a hollow spindle.

[0063] The quick chuck device 23 further comprises a holding unit 37 with a holding member 39 for holding the attachment device 17 on the hand-held machine tool 13. The holding unit 37 is adjustable such that the holding parameters change in the holding state, in particular when the holding unit 37 passes from the holding state to the clamping state.

[0064] By changing the holding parameters, the attachment 17 can be shifted from the holding state to the tightened state in a particularly simple manner. The holding parameters of the holding unit 37 are adjusted in such a way that, in order to hold the attachment 17 in the quick chuck device 23, the holding unit 37 can be shifted from the released state to the holding state by a rotational movement (FIGS. 10; 11 et seq.) or by a rotational and translational movement (FIGS. 2 to 9). In this case, the holding unit 37 or the holding member 39 is movably supported or positively guided in the holding state so as to be capable of a rotational movement (FIGS. 10; 11 et seq.) or so as to be capable of a rotational and translational movement (FIGS. 2 to 9).

[0065] Furthermore, the holding parameters of the holding unit 37 can be adjusted or changed in such a way that the holding unit 37 is displaced by a translational movement from the holding state to the clamping state in order to clamp the accessory device 17 by means of the quick-chuck device 23. In this case, the holding unit 37 or the holding member 39 is movably supported or positively guided in the clamping state for translational movement (FIGS. 2 to 9; FIG. 10) or for rotational and translational movement (FIGS. 11 et seq.). Particularly preferably, a separation of functions is obtained in that the holding parameters of the holding unit 37 are changed in the holding state, whereby the direction of movement of the holding member 39 of the holding unit 37 can be changed, in particular blocked or released. For example, when transitioning from the holding state to the clamping state, the relative rotational movement of the holding member about the driven axis A and the relative translational movement along the driven axis A are changed into a relative translational movement along the driven axis A (FIGS. 2 to 9). For example, when transitioning from the holding state to the tightening state, the relative rotational motion of the retaining member 39 about the driven axis A is changed to relative translational motion along the driven axis A (FIG. 10). For example, when transitioning from the holding state to the tightening state, the relative rotational motion of the retaining member 39 about the driven axis A is changed to relative rotational motion about and relative translational motion along the driven axis A (FIGS. 11 et seq.).

[0066] The holding parameters may be interpreted as the degrees of freedom of movement of the holding member 39 .

[0067] A holding member 39 is provided for holding the attachment device 17 to the quick-chuck device 23 in a form-locking manner.

[0068] In addition to the holding member 39, the holding unit 37 has a spindle member 47. The holding member 39 is supported in one position so as to be movable relative to the spindle member 47. The holding member 39 and the spindle member 47 are arranged relative to one another in such a way that the attachment 17 is axially held on the quick-chuck device 23 along the driven axis A. The holding member 39 and the spindle member 47 are provided for transmitting a clamping force to the attachment 17 by means of a clamping unit 51. The clamping force preferably corresponds at least to a holding force that is set for holding the attachment 17 on the quick-chuck device 23 or on the quick-chuck device 23 in the operating state of the hand-held machine tool 13. The holding member 39 and the spindle member 47 are supported in one position so as to be axially movable relative to one another along the driven axis A for axial clamping of the attachment 17.

[0069] The spindle member 47 grips the retaining member 39 along a circumferential direction lying in a plane having a surface normal extending at least approximately parallel to the driven axis A. The spindle member 47 is configured as a hollow shaft to at least partially receive the retaining member 39.

[0070] The holding element 39 is provided for engaging the receiving recess 21 of the attachment 17 in a form-locking manner with the attachment 17 on the quick-chuck device 23. The holding element 39 has a number of, in particular four, holding wings 53, which extend radially outward with respect to the driven axis A. The holding element 39 has a holding contour 55, which corresponds approximately to the receiving contour 57 of the receiving recess 21 of the attachment 17. The holding contour 55 is described by the contour of the holding wings 53. The holding contour 55 is configured approximately corresponding to the receiving contour 57 and is smaller than the receiving contour 57 so that the holding wings 53 can engage the receiving recess 21 through. The holding element 39 is configured such that the holding contour 55 fits through the receiving contour 57 so that the holding element 39 can be inserted through the receiving recess 21 of the attachment 17. The retaining element 39 is provided for holding the accessory 17 with the retaining wings 53 engaging through the receiving recess 21 of the accessory 17. The retaining element 39 is rotatable relative to the receiving recess 21 such that the retaining wings 53 form a positive lock with the accessory 17. The retaining contour 55 is alignable relative to the receiving contour 57 such that in a first rotational position (FIG. 13), the retaining contour 55 overlaps with the receiving contour 57, whereby the retaining element 39 can be inserted through the receiving recess 21, and when rotated to a second rotational position (FIG. 14) about the driven axis A, the retaining element 39 can be inserted through the accessory tool depending on the rotational position of the retaining element 39, and when the rotational position is changed, the retaining element 39 forms a positive lock with the accessory 17, in particular in the axial direction along the driven axis A.

[0071] The holding member 39 is in particular permanently connected to the quick-chuck device 23 in a release state (FIG. 9), a holding state (FIG. 8) and a clamped state, in particular a clamped state (FIG. 7). The holding member 39 is supported axially and translationally along the driven axis A and / or rotatably about the driven axis A in a relatively movable manner relative to the spindle member 47, where the axis of movement, in particular the axis of rotation, of the holding member 39 coincides at least approximately with the driven axis A. In FIG. 9, the quick-chuck device is in the release state and transitions to the holding state during the movement of the holding member 39. The release state of FIG. 9 forms the bottom dead center of the holding member. When the quick-chuck device moves from the position of FIG. 9 to the position of FIG. 8, the quick-chuck device is in the holding state. In FIG. 8, the quick-chuck device is in the transition state from the holding state to the clamped state. When the quick chuck device moves from the position of FIG. 8 to the position of FIG. 7, the quick chuck device is in a clamped state, and in FIG. 7, the quick chuck device reaches a clamped and fixed state in which the holding member reaches the top dead center.

[0072] The holding member 39 is supported so as to be rotatable about the driven axis A in the holding state and / or in one clamping state. Multiple In the tightened state, the holding member 39 is supported so as to be movable approximately along the driven axis A. In the holding state, the holding member 39 is supported so as to be rotatable about the driven axis A and / or movable along the driven axis A. In the tightened state, the holding member 39 is supported so as to be rotatable about the driven axis A and / or movable along the driven axis A. In the holding state, the holding member 39 may be supported so as to be immovable along the driven axis A (FIG. 10; FIG. 11 and onward). In the tightened state, the holding member 39 may be supported so as not to be rotatable about the driven axis A (FIGS. 2 to 9; FIG. 10). The separation of functions is obtained by switching the holding member 39 from a support state rotatable about the driven axis A to a support state movable along the driven axis A when transitioning from the holding state to the tightened state. The separation of functions can further be achieved by the holding unit 37 being supported so as to be movable, for example in a clamped manner and translationally along the driven axis A, or being supported so as to be movable translationally along the driven axis A and rotatably about the driven axis A.

[0073] In Figures 10 and 11 onwards, movement of the retaining member relative to the spindle member along the driven axis is blocked until the retaining state transitions from the released state to the clamped state of the retaining unit. In Figures 2 to 9, movement of the retaining member relative to the spindle member about the driven axis is blocked from the time the retaining state transitions to the clamped state until the retaining unit is clamped and fixed.

[0074] To secure the accessory, the retaining member is rotatable about the driven axis from a released state (bottom dead center) to a clamped state (top dead center) relative to the spindle member by a predetermined angle. The angle has a range of 0° to 40° with a tolerance of +20° to -10° (Figs. 2-9; Fig. 10). The angle has a range of 0° to 48° with a tolerance of + / -16° (Figs. 11 et seq.).

[0075] The change in the holding parameters is effected by a change in the degrees of freedom of the holding unit 37, in particular the holding member 39, for example by blocking the rotational movement and releasing the translational movement.

[0076] The retaining member 39 is provided for penetrating engagement with the attachment 17 and clamping the attachment 17. In the released state, the retaining member 39 extends through the attachment 17 and in the holding state, the retaining member 39 is provided for rotating the attachment 17 relative to the attachment 17 by a rotational movement about the driven axis A and for holding the attachment 17 in a form-locking manner. Depending on the rotational position of the retaining member 39, the attachment tool can be inserted through the retaining member 39 (FIG. 13) and, when the rotational position is changed, forms a form-lock with the attachment 17 in the axial direction along the driven axis A (FIG. 14). The retaining member 39 has retaining wings 53, which extend radially with respect to the driven axis A and are provided for gripping the attachment 17 at least in sections. The retaining wings 53 are provided for exerting a clamping force on the attachment 17. The retaining wings 53 have retaining surfaces 54 which extend in a radial plane of the driven axis A and in a radial plane relative to the driven axis A.

[0077] The retaining member 39 is provided to shift the accessory device 17 from a released state to a retained state (Figures 2 to 9; Figure 10) and / or a tightened state (Figures 11 and following) by rotational movement of the retaining member 39 about the driven axis A relative to the spindle member 47.

[0078] The quick chuck device 23 has a clamping unit 51 with a clamping member 61, which is provided for moving the holding member 39 axially along the driven axis A. The clamping unit 51 is connected to the holding unit 37. The clamping member 61 is provided for displacing the attachment 17 axially from a holding state to a clamped state by the holding unit 37. The clamping member 61 is provided for transmitting a clamping force axially along the driven axis A to the attachment 17, thereby clamping the attachment 17. The clamping member 61 is provided for controlling the axial movement of the holding member 39. The clamping member 61 is provided for axially clamping the attachment along the driven axis A by a rotational or relative movement of the clamping member 61 about the driven axis A relative to the spindle member 47.

[0079] The clamping element 61 has a gradient element 65 configured as a threaded element (FIGS. 2 to 9) or as an inclined element (FIGS. 10; 11 et seq.). The gradient element 65 is configured as a wedge-shaped element, which is provided for replacing the circumferential movement of the holding element 39 about the driven axis A with an axial movement of the holding element 39 along the driven axis A. The gradient element 65 may have a varying or constant gradient. The gradient element 65 may be configured with a monotonic, in particular a very monotonic, ascending gradient. The gradient element 65 may form a threaded section.

[0080] The clamping unit 51 has a number of gradient elements 65, which are connected to one another in the circumferential direction. The gradient elements 65 may be arranged next to one another in the circumferential direction (FIG. 10). The gradient elements 65 may be spaced apart from one another in the circumferential direction (FIG. 11 et seq.). The gradient elements 65 are delimited by two radial planes extending radially relative to the driven axis A and / or arranged parallel to one another. The two radial planes each delimit a first gradient element 65. The distance between the two radial planes is delimited by the maximum axial length of the gradient elements 65. The two radial planes have a distance from one another that approximately corresponds to the maximum axial movement of the holding element 39 along the driven axis A from the released state to the clamped state.

[0081] The gradient element 65 has a first gradient section 71 and a second gradient section 73 that is bent relative to the first gradient section 71. The first gradient section 71 extends in a radial plane of the driven axis A. The first gradient section 71 is designed flat. The first gradient section 71 is designed flat in the circumferential direction about the driven axis A and does not have a gradient. It is conceivable that the first gradient section 71 is bent relative to the radial plane of the driven axis A. The second gradient section 73 is bent relative to the radial plane of the driven axis A. By means of the first gradient section 71 and the second gradient section 73 of the gradient element 65, the holding parameters of the holding unit 37 are changed.

[0082] Another gradient member 67 is constructed similarly to gradient member 65 .

[0083] The clamping unit 51 has a further gradient element 67 arranged corresponding to the gradient element 65, which is provided for direct or indirect cooperation with the gradient element 65. The further gradient element 67 is in contact with the gradient element 65. The further gradient element 67 is supported so as to be movable relative to the gradient element 65 in the circumferential direction about the driven axis A and / or in the axial direction along the driven axis A. The further gradient element 67 is supported so as to be slidable relative to the gradient element 65. The gradient element 65 and the further gradient element 67 form a threaded element (FIGS. 2 to 9) or an inclined element (FIGS. 10; 11 et seq.) which cooperate with each other. The further gradient element 67 is arranged on the further clamping element 63.

[0084] The fastening member 61 may be configured integrally with the holding member 39 (FIGS. 2 to 9). The fastening member 61 may be configured as a separate fastening ring connected to the holding member 39 (FIGS. 10; 11 et seq.). The fastening member 61 delimits the holding member 39 in the radial direction relative to the driven axis A. The fastening member 61 is configured integrally with the holding member 39. The fastening member 61 surrounds the holding member 39 at least in one plane by 360° and is arranged concentrically with the holding member 39. The fastening member 61 is configured as a separate component, which can be connected to the holding member 39 in a non-rotatable manner (FIGS. 10; 11 et seq.). The fastening member 61 is configured as a separate component, which is connected to the holding member 39 by means of a fastening means 75 configured as a fastening screw. The fastening member 61 is configured approximately in the shape of a disk. The fastening member 61 is configured approximately in the shape of a ring. The fastening member 61 is rigidly connected to the holding member 39 in such a way that relative movements (rotational, translational) of the two members are prevented. The fastening member 61 is connected to the holding member 39 in such a way that it cannot rotate relative to the holding member 39. The fastening member 61 is provided for fastening the holding unit 37 to the further fastening members 61, 63 of the fastening unit 51 by the rotational movement of the fastening member 61. The fastening member 61 is arranged on the side of the holding member 39 opposite the accessory device 17. The fastening member 61 is slipped over the holding member 39.

[0085] The clamping unit 51 has a further clamping member 63, which is provided for direct or indirect cooperation with the clamping member 61. The further clamping member 63 may be arranged on the spindle member 47 or on the preload member 77.

[0086] In Fig. 2 to Fig. 9, the further fastening member 63 is arranged on the spindle member 47 and is provided for cooperating with the fastening member 61, which is configured integrally with the holding member 39, either indirectly or by means of a preload member 77 configured as a preload sleeve. The fastening member 61 is configured integrally with the holding member 39. The further fastening member 63 delimits the radial length of the spindle member 47. The further fastening member 63 is configured integrally with the holding member 39 or in one piece. In this case, the preload member 77 has two intermediate fastening members 81, 83 corresponding to the fastening member 61 and the further fastening member 63. The intermediate fastening members 81, 83 are arranged on the preload member 77 and are configured integrally with this preload member 77. The first intermediate fastening member 81 is arranged on the inside of the preload member 77 and is configured as an internal thread. The second intermediate fastening member 83 is arranged on the outside of the preload member 77 and is configured as an external thread. The first intermediate fastening member 81 is provided for cooperation with the fastening member 61 configured as an external thread. The second intermediate fastening member 83 is provided for cooperation with the further fastening member 63 of the spindle member 47 configured as an internal thread. The intermediate fastening members 81, 83 delimit the preload member 77 in a radial direction relative to the driven axis A. The further fastening member 63 is configured integrally with the preload member 77.

[0087] In FIG. 10, the further fastening member 63 is arranged on the preload member 77 configured as a preload sleeve and is provided for direct cooperation with the fastening member 61 configured as a fastening ring. The fastening member 61 is configured as a separate component. The fastening member 61 is configured as a separate fastening ring connected to the retaining member 39. The fastening member 61 and the further fastening member 63 are configured as inclined members (FIG. 10; FIG. 11 onwards). The further fastening member 63 delimits the preload member 77 in the axial direction along the driven axis A. The further fastening member 63 is configured integrally with the preload member 77. At the bottom left of FIG. 10, a variant of the preload member 77 is shown, which has a further fastening member 63 that delimits the axial length of the preload member 77. In this case, the further fastening member 63 extends annularly on the end face side of the preload member 77 and / or projects radially towards the driven axis A. In FIG. 10, the further fastening member 63 extends annularly on the end face side of the preload member 77 and / or projects radially towards the driven axis A. right Below, another fastening member 63 is disposed within an inner region of the preload member 77. The another fastening member 63 is bounded radially by a hollow cylindrical wall extending axially along the driven axis A.

[0088] 11 onwards, a further fastening member 63 is arranged on the spindle member 47 configured as a spindle sleeve and is provided for direct cooperation with the fastening member 61 configured as a fastening ring. The further fastening member 63 delimits the spindle member 47 in the axial direction along the driven axis A. The further fastening member 63 is configured integrally with the spindle member 47. The further fastening member 63 is connected to the spindle member 47 and is in direct contact with this fastening member 61.

[0089] The fastening member 61 and the further fastening member 63 each have at least one gradient element 65, 67 forming a threaded or ramp-type element. It is self-evident that only the fastening member 61 or only the further fastening member 63 may have a gradient element 65, 67. For example, one of the fastening members 61, 63 may not have a gradient element 65, 67 but may be configured, for example, as a kind of ridge, which is provided for cooperating with a corresponding gradient element 65, 67.

[0090] The holding element 39 has a spindle element 47 which cooperates with the holding element 39 by means of a clamping unit 51 and is provided for driving the accessory 17 about the driven axis A. The spindle element 47 comes into indirect contact with the accessory 17 in that it has a support element 85 with a support surface 87, which serves for axially supporting the accessory 17 along the driven axis A. The spindle element 47 is configured as a spindle sleeve and surrounds the holding element 39 in one plane by 360°. The spindle element 47 is provided for supporting the accessory 17 in a circumferential direction about the driven axis A at least in the clamped state and for driving it in the operating state. For this purpose, the spindle element 47 has an interlocking element 89 which is provided for rotating the accessory 17 about the driven axis A. The interlocking element 89 is configured as a rotary interlocking element. The interlocking member 89 is provided for gripping and / or forming a positive fastening with the attachment device 17 .

[0091] The quick chuck device 23 has a preload member 77, which is provided for controlling one or more holding parameters of the holding unit 37. The preload member 77 is provided for cooperating with the holding member 39 and the spindle member 47. The preload member 77 has further fastening members 61, 63 with further ramp members 65, 67, which are configured as threaded members or external threads.

[0092] In particular, the translational movement of the holding member 39 relative to the spindle member along the driven axis A from the transition from the holding state to the clamped state (top dead center) is greater than from the transition from the release state to the clamped state of the holding member 39. In a preferred manner, the translational movement of the holding member 39 is interrupted between the transition from the release state to the clamped state and is released by the transition from the holding state to the clamped or clamped state. During the movement from the release state to the transition from the holding state to the clamped state, the holding member 39 is movable only by a rotational movement such that the accessory is held by the hand-held machine tool 13.

[0093] In particular, the rotational movement of the retaining member 39 relative to the spindle member about the driven axis A from the release state until the transition from the retaining state to the tightened state is greater than the rotational movement from the retention state to the clamped state of the retaining member 39. In a preferred form, the rotational movement of the retaining member 39 is interrupted from the transition from the retaining state to the tightened state and is released from the release state until the transition from the retaining state to the tightened state.

[0094] The preload member 77 surrounds the holding member 39 in the circumferential direction about the driven axis A. The preload member 77 is designed approximately hollow cylindrically and forms a preload sleeve. In the holding state, the preload member 77 is movably supported relative to the holding member 39 and / or the spindle member 47 and is preloaded axially relative to the holding member 39. The preload member 77 is arranged on the holding member 39 and is connected thereto. The preload member 77 is designed non-rotatable relative to the holding member 39 and is surrounded by the spindle member 47. The preload member 77 is preloaded relative to the spindle member 47 in the circumferential direction about the driven axis A and has a main direction of extension extending along the driven axis A. With the preload member 77, a functional separation is obtained in that, on the one hand, the preload member 77 displaces the holding member 39 from the release state to the holding state by a rotational movement and, on the other hand, from the holding state to the clamping state by a translational movement.

[0095] The holding unit 37 includes a spindle member 47 and a holding member 39, where the preload member 77 is disposed between the spindle member 47 and the holding member 39. The preload member 77 surrounds the holding member 39 and is surrounded by the spindle member 47. The preload member 77 is disposed concentrically with respect to the spindle member 47 and the holding member 39.

[0096] A preload member 77 is connected to the retaining member 39 and the spindle portion 47 and is provided for cooperating with the spindle member 47 and the retaining member 39. The preload member 77 is provided for axially clamping the retaining unit 37 relative to the spindle unit along the driven axis A in a clamping condition.

[0097] The quick chuck device 23 has a cam transmission 91, which is provided for moving the holding member 39 in a rotational direction about the driven axis A. The cam transmission 91 is provided for reciprocating the holding member 39 between two end positions (FIGS. 7 to 9). The cam transmission 91 is provided for converting the linear movement of the unlocking pin 29 of the quick chuck device 23 at least partially into a rotational movement, in particular into the rotational movement of the holding member 39. For this purpose, the cam transmission 91 has a guide unit 95, which is provided for controlling the rotational movement of the holding member 39 relative to the spindle member 47. The guide unit 95 is provided for shifting the holding member 39 from the release state to the tightened state and vice versa. The guide unit 95 has a number of guide recesses 99, which are provided for axially guiding a clamping pin 97, which is connected transversely to the unlocking pin 29, along the driven axis A. The unlocking pin 29 is connected to the clamping pin 97 in a form-locking manner. The unlocking pin 29 is arranged coaxially with respect to the driven axis A. The clamping pin 97 is configured as a clamping bolt and delimits the movement of the holding element 39 axially along the driven axis A and / or circumferentially about the driven axis A relative to the spindle element 47. The guide recesses 99 have a partially curved path with a curved shape relative to the driven axis A. The clamping pin 97 is guided in the guide recesses 99 such that the clamping pin 97 controls the holding element 39 relative to the spindle element 47. The movement of the clamping pin 97 axially along the guide recesses 99 results in a forced movement of the holding element 39 relative to the spindle element 47. The clamping pin 97 is arranged to slide relative to the spindle member 47 and the holding member 39 in the axial direction along the driven axis A, in particular along one or more guide notches 99, whereby a movement of the holding member 39 relative to the spindle member 47 is forced by means of the cam gear 91. The guide unit 95 has a number of guide notches 99, which in particular have a straight, helical or other curved shape.Movement of the retaining member 39 relative to the spindle member 47 can be controlled depending on the orientation of the guide notches 99 .

[0098] The cam transmission 91 comprises a number of cam transmission members 93, which are formed by the holding member 39, the preload member 77 and / or the spindle member 47. The cam transmission members 93 each have a guide notch 99. The guide notches 99 are provided to guide the tension pin 97 and to control the rotational movement of the holding unit 37 about the driven axis A. By means of the guide notches 99 the movement of the cam transmission members 93 can be coupled.

[0099] In a preferred manner, the preload element 77 has a preload guide element 101, in particular a preload guide groove. Preferably, the spindle element 47 has a spindle guide element 102, in particular a spindle guide groove. Particularly preferably, the holding element 39 has a holding guide element 103, in particular a holding guide groove. Furthermore, each guide recess 99 is preferably connected with a clamping pin 97. In particular, the guide recess 99 is provided for controlling the axial movement (FIG. 10) of the holding element and / or the preload element 77 relative to the spindle element 47 by means of the clamping pin 97 guided in or along the guide recess 99. In particular, the guide recesses 99 are each formed as elongated holes. The elongated holes may each be at least partially shaped straight and / or curved. At least one guide recess 99 has an extension line along the driven axis A, which extension line is provided for delimiting the axial movement of the holding element 39. In particular, the clamping pin 97 is provided to be guided along a guide notch 99 so that the retaining member 39 can be moved relative to the preload member 77 and the spindle member 47 to move the quick chuck device 23 from a clamped state to a released state and vice versa.

[0100] In particular, the guide unit 95 and the tightening unit 51 cooperate with each other to control the holding member 39 from the released state to the tightened state, or from the released state to the holding state or the tightened state, and vice versa.

[0101] 2 to 9, a clamping pin is inserted into the preload guide member 101, the spindle guide member 102 and the holding guide member 103 and is guided axially along the guide members so as to be able to force a movement of the holding member relative to the spindle member. Furthermore, the axial movement of the holding member relative to the spindle member is delimited by the clamping member 61 and the further clamping member 63. The two clamping members 61, 63 together with the two intermediate clamping members 81, 83 form two threads. The guide members 99, 101, 102, 103 are configured to be curved, in particular to be linear and / or curved at least in sections, so that when transitioning from the release state to the holding state, one thread is blocked and another thread is released and when transitioning from the holding state to the clamping state, the two threads are released.

[0102] The quick chuck device 23 has a spring member 105, which is provided for biasing the holding member 39 toward the preload member 77 and / or the spindle member 47 in the released state. The spring member 105 is configured as a tension / compression spring. The spring member 105 is supported in a hollow chamber of the holding member 39. The spring member 105 is provided for biasing the clamping pin 97 or the unlocking pin 29. In the released state, the spring member 105 is preloaded more strongly than in the clamped state.

[0103] The quick chuck device 23 may have a further spring member 107, which is provided for biasing the preload member 77 in a circumferential direction about the driven axis A towards the spindle member 47 (FIG. 10). The further spring member 107 is configured as a torsion spring. It surrounds the holding member 39 in one plane by 360°. The further spring member 107 can be axially connected to the preload member 77. The further spring member 107 is provided for clamping the preload member 77 against the spindle member 47 in a clamped state. In this case, the further spring member 107 is clamped as strongly in the clamped state as in the released state. The torsion spring is preloaded or stress-relieved against the spindle member 47 depending on the rotational movement of the holding member 39. The torsion spring has two legs. The first leg is positively connected to the preload member 77 and is located in an axially extending positive recess 109 of the preload member 77. The second leg is positively connected, in particular non-rotatably, indirectly or directly to the spindle member 47 and is located in another axially extending positive recess. [Explanation of symbols]

[0104] 12 Machine tools 13 Handheld machine tools 15. Housing 17 Attachment 19 Connecting Devices 21 Receiving notch 23 Quick chuck device 25 Operating means 27 Eccentric body 29 Unlocking pin 31 Drive unit 33 Driven unit 37 Holding Unit 39 Retaining member 47 Spindle parts 51 Fastening unit 53 retaining wing 54 Holding surface 55 Retention Contour 57 Receiver Profile 61 Fastening members, preload members 63 Separate fastening members, preload members 65 Sloped, inclined and threaded members 67 Another gradient member 71 First Gradient Section 73 Second Gradient Section 75 Fixing means 77 Preload member 81 First intermediate fastening member 83 Second intermediate fastening member 85 Mounting member 87 Mounting surface 89 Interlocking parts 91 Cam transmission 93 Cam transmission member 95 Guide unit 97 Fastening pins, fastening bolts 99 Guide notch 101 Preload guide member, preload guide groove 102 Spindle guide member, spindle guide groove 103 Holding guide member, holding guide groove 105 Spring material 107 Another spring member 109 Shape notch A Driven axis

Claims

1. A quick chuck device (23) for positioning an attachment (17) on a hand-held machine tool (13), the type having a driven unit (33) provided for moving said attachment (17) about a driven axis (A) and a holding unit (37) provided for holding said attachment (17) on said hand-held machine tool (13), The holding unit (37) includes a spindle member (47) that moves together with the auxiliary device (17) in a tightened state in which the auxiliary device (17) is tightened, and a holding member (39) that is capable of performing each of a plurality of types of relative motion with respect to the spindle member (47), the plurality of types of relative motions are a rotational motion about the driven axis (A), a translational motion along the driven axis (A), and a combination of the rotational motion and the translational motion; When the auxiliary device (17) is transferred from a holding state in which the auxiliary device (17) is held to the tightening state, the relative motion of the holding member (39) with respect to the spindle member (47) changes from a first motion, which is any one of the plurality of types of relative motions, to a second motion, which is any other one of the plurality of types of relative motions, or to the first motion with a different physical quantity related to the motion. A quick chuck device characterized by the above.

2. The holding member (39) is supported rotatably about the driven axis (A) in the holding state, and supported movably along the driven axis (A) in the tightening state.

2. The quick chuck device according to claim 1, wherein the quick chuck device is a chuck for holding a workpiece.

3. The translational motion is prohibited in the holding state.

3. The quick chuck device according to claim 1 or 2.

4. The rotational movement is prohibited in the tightened state.

4. The quick chuck device according to claim 1, further comprising:

5. The retaining member (39) is provided for penetrating and fastening the accessory device (17).

5. The quick chuck device according to claim 1, further comprising:

6. A clamping unit (51) is provided for causing the retaining member (39) to move in translation along the driven axis (A).

6. The quick chuck device according to claim 1, further comprising:

7. The clamping unit (51) has a gradient member (65) 7. The quick chuck device according to claim 6.

8. The clamping unit (51) has a further gradient member (67) which is provided for indirect or direct cooperation with the gradient member (65).

8. The quick chuck device according to claim 7.

9. The gradient member (65) has a first gradient section (71) and a second gradient section (73) angled relative to the first gradient section (71). The quick chuck device according to claim 7 or 8, characterized in that

10. A part of the fastening unit (51) is integrally formed with the holding member (39) or is connected to the holding member (39).

10. The quick chuck device according to claim 6, wherein the quick chuck device is a chuck for holding a workpiece.

11. A preload member (77) is provided for preloading the spindle member (47). The quick chuck device according to any one of claims 1 to 10, characterized in that

12. A cam transmission (91) is provided for rotating the retaining member (39) about the driven axis (A). The quick chuck device according to any one of claims 1 to 11, characterized in that

13. The cam transmission (91) has a guide unit (95) provided for at least one of the plurality of types of relative movements of the holding member (39) with respect to the spindle member (47). The quick chuck device according to claim 12 .

14. A spring member (105) is provided for biasing the retaining member (39) toward the spindle member (47). The quick chuck device according to any one of claims 1 to 13, characterized in that

15. A quick chuck device (23) according to any one of claims 1 to 14. Handheld machine tools.

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