Chuck device for clamping an object, clamping ring arrangement and method

Abstract

The invention relates to a chuck device (1), comprising a clamping jaw device (2) with clamping jaws (12) and with a supporting body unit (22), and a clamping sleeve device (3) with a clamping sleeve (13) and with a rotatable clamping ring unit (23). The clamping ring unit (23) comprises an internal thread structure (33) with internal thread sections (330) and with decoupling sections (331). The clamping jaw device (2) comprises an external thread structure (32) with external thread sections (320) and with cut-out sections (321). An additional clamping ring (4), which is rotatably arranged relative to the clamping jaw device (2), is provided with an internal thread arrangement (14) which can be screwed to the external thread structure (32) and has internal thread regions (24) and decoupling regions (34).

Description

[0001] Chuck device for clamping an object and clamping ring arrangement and method

[0002] The present invention relates to a chuck device for clamping an object, for example a drill, and comprises a clamping jaw device with clamping jaws and with a support body unit for the clamping jaws and a clamping sleeve device with a clamping sleeve with at least one clamping ring unit rotatable relative to the clamping jaw device in a clamping direction and a release direction.

[0003] Such chucks have long been used in both stationary machines and mobile hand drills and cordless screwdrivers. To simplify workpiece changes, designs known as quick-adjust chucks have become popular.

[0004] For example, US 9 283 625 B2 shows a quick-adjustment chuck with three clamping jaws, onto which a nut is screwed to clamp the drill bit. The nut has three recesses in the thread and can be turned so that the clamping jaws are located exactly in the recesses. As a result, the thread of the nut no longer engages with the external thread of the clamping jaws. This puts the drill chuck in a quick-adjustment mode in which the clamping jaws can simply be pushed apart when inserting the drill bit. To clamp the drill bit, the nut is then screwed onto the clamping jaws so that the threads engage again.

[0005] The problem with this quick-adjustment mode is that the nut for clamping the drill bit must be turned less than one-third of its circumference, or less than 120°. Otherwise, the clamping jaws will rotate back to match the recesses, and the threads will disengage. Then, the drill bit is only held by the clamping jaws in quick-adjustment mode, which is usually done by spring force and is not sufficient for drilling.

[0006] A quick-adjustment chuck is known from US 6 505 840 B2 in which the three clamping jaws are enclosed by a ring with an external thread. The thread is interrupted at numerous points by recesses. The recesses are distributed asymmetrically around the circumference. To clamp the clamping jaws, a sleeve with an internal thread is screwed onto the ring. The internal thread also has numerous recesses, which are distributed around the circumference in an identical manner to the recesses of the external thread. As a result, the internal and external threads are only disengaged when the sleeve is rotated at a very specific angular position to the ring. This allows the clamping jaws to be tightened with almost a full rotation of the sleeve before the threads disengage again and the quick-adjustment mode is reactivated.

[0007] In practice, it has been shown that the drill chuck often needs to be tightened several times to securely clamp the drill bit. Mobile machines, such as cordless screwdrivers, often use drill bits whose clamping surfaces have become dirty or uneven due to use on the construction site. Such drill bits usually cannot be clamped sufficiently tightly if only about one turn is available for the actual clamping before the quick-adjustment mode is reached again.

[0008] Another significant problem with such solutions is that if the threads of the external thread do not align with the threads of the internal thread, the threads often do not mesh at first. Therefore, slippage through chamfering or similar means is usually necessary. This can result in the internal thread, when attempting to engage the external thread, sliding downward into the nearest thread. If this happens, the entire thread must first be "wound up" before any support can be provided by the component with the external thread.

[0009] In addition, there is always the risk that the threads were turned when the drill was clamped until shortly before reaching the quick-adjustment mode. This can result in only very short sections of the threads remaining in engagement. This can cause the threads to wear out particularly quickly or even be destroyed. There is also the danger that the drill could unexpectedly come loose while the machine is in operation, which also poses a risk of injury.

[0010] From US 6 843 484 B2 a drill chuck for stationary machines is known in which a nut consisting of two separate half-shells is provided for clamping. For the quick adjustment mode the half-shells can be moved apart so that they no longer engage with an external thread for the clamping jaws. To clamp the chuck tightly the half-shells are pressed together so that they form an annular nut which engages with the external thread. The drill can then be clamped firmly by several turns of the clamping sleeve. However the manufacture and assembly of such a drill chuck is often very complex and cost-intensive.

[0011] Therefore, other solutions to simplify drill bit changes are proposed in the prior art. Drill chucks have become known in which the clamping jaws can be tightened with a ratchet mechanism. In addition, drill bits with hexagonal shanks are often used, which can be easily inserted into a drill chuck with a hexagonal receptacle. Drill chucks with automatic size adjustment are known from DE 9 409 258 U1 and EP 1 504 836 B1.

[0012] In contrast, the object of the present invention is to provide an improved chuck device. In particular, the object or drill should be able to be exchanged as quickly and easily as possible and, at the same time, clamped particularly reliably and securely. Preferably, a solution should be found that advantageously allows use with both stationary and mobile machines.

[0013] This object is achieved by a chuck device having the features of claim 1. A clamping ring arrangement according to the invention is the subject of claim 20. A method according to the invention is the subject of claim 21. Preferred developments and refinements of the invention are the subject of the respective subclaims. Further advantages and features of the present invention emerge from the general description and the description of the exemplary embodiments.

[0014] The chuck device according to the invention can also be referred to as a chuck or drill chuck and is used to clamp an object, in particular a drill or other tool insert. The object can also be a workpiece. The chuck device comprises a clamping jaw device. The clamping jaw device comprises clamping jaws which can be clamped against the object, and a support body unit for the clamping jaws. In particular, the clamping jaws are movable and, in particular, adjustable between an open position and a clamping position on the support body unit. The chuck device comprises a clamping sleeve device with a clamping sleeve and with at least one rotatable clamping ring unit. In particular, the clamping ring unit is rotatable relative to the clamping jaw device.In particular, the clamping ring unit is rotatable in a clamping direction for clamping the clamping jaws against the object and / or in a release direction for releasing the clamping jaws from the object. The clamping ring unit has at least one internal thread structure. The internal thread structure comprises (adjacent in the circumferential direction) internal thread sections and (thread-free) decoupling sections arranged (in the circumferential direction) between the internal thread sections. The clamping jaw device has an external thread structure that can be screwed to the internal thread structure. The external thread structure comprises (adjacent in the circumferential direction) external thread sections and (thread-free) recess sections arranged (in the circumferential direction) between the external thread sections. In particular, the internal thread sections correspond to the recess sections. In particular, the external thread sections correspond to the decoupling sections.In particular, the clamping ring unit can be positioned by (relative) movement and, for example, rotating and / or shifting (relative to the additional clamping ring) such that the internal thread sections are no longer engaged with the external thread sections. The chuck device comprises at least one additional clamping ring. In particular, the additional clamping ring is rotatable relative to the clamping jaw device (in the clamping direction and / or in the release direction). In particular, the additional clamping ring is rotatably arranged on the clamping jaw device. In particular, the additional clamping ring comprises at least one internal thread arrangement. In particular, the internal thread arrangement can be screwed to the external thread structure. The internal thread arrangement comprises (adjacent in the circumferential direction) internal thread regions. In particular, the internal thread regions can be screwed to the external thread sections.The internal thread arrangement comprises (thread-free) decoupling areas arranged in the circumferential direction between the internal thread areas.

[0015] The present invention offers many advantages. The additional clamping ring offers a significant advantage. This reliably prevents the clamping sleeve from reaching a position where the external thread structure of the clamping jaws is no longer engaged with a thread after a partial or full rotation (or even after several rotations) when turning the clamping sleeve in the clamping direction. The additional clamping ring allows the clamping sleeve to be tightened over a (theoretically infinite) number of rotations, so that even dirty or out-of-round drill bits can be clamped reliably and firmly. There is no risk of the threads being too loosely engaged.

[0016] Another advantage of clamping with multiple (any number of) turns is that even in the event of a malfunction (e.g., due to heavy contamination), the chuck can still be easily rotated / screwed from the "fully open" to "fully closed" position. Otherwise, such a malfunction would cause the clamping jaws to become stuck in the rear part of the drill chuck and no longer move forward on their own.

[0017] In addition, the drill can be centered particularly precisely in the chuck by clamping it with several turns, which is particularly important for pillar drills.

[0018] At the same time, the additional clamping ring offers the option of a quick-adjustment mode. This allows a drill to be fixed or clamped in quick-adjustment mode and then tightened by turning the clamping sleeve to the optimal number of turns. There's no need to worry about accidentally reactivating the quick-adjustment mode at some point.

[0019] The additional clamping ring also allows the invention to be implemented with particularly simple design and manufactured cost-effectively. A further advantage is that the chuck device with the additional clamping ring can be used equally effectively on mobile and stationary machines.

[0020] It is possible and advantageous that by moving the clamping ring unit relative to the additional clamping ring, the clamping ring unit and the additional clamping ring can be coupled to one another (in a rotationally fixed manner) or are coupled to one another. The movement (for the purpose of coupling) is in particular a relative movement. In particular, the movement (for the purpose of coupling) comprises rotating the clamping ring unit relative to the additional clamping ring in the clamping direction. Additionally or alternatively, a translational relative movement (for the purpose of coupling; can also be referred to as axial displacement) can also take place. If the clamping ring unit and the additional clamping ring are coupled to one another, they can preferably only be rotated further in the clamping direction in the coupled state and in particular only together. If the clamping ring unit and the additional clamping ring are coupled to one another (so-calledcoupled state) and are further rotated in the clamping direction, preferably at least some of the internal thread sections and / or at least some of the internal thread areas are always in engagement with the external thread sections.

[0021] In particular, the clamping ring unit and the additional clamping ring can be coupled to one another in a rotationally fixed manner (with respect to the clamping direction). In particular, by (relative) rotating the clamping ring unit (relative to the additional clamping ring) in the clamping direction, the clamping ring unit and the additional clamping ring can be coupled to one another in a rotationally fixed manner. In particular, the clamping ring unit and the additional clamping ring can be coupled to one another in such a way that they can only be rotated further in the clamping direction together. In particular, during (relative) further rotation in the clamping direction, at least some of the internal thread sections and / or the internal thread regions are (always) in engagement with the external thread sections.

[0022] If the clamping ring unit and the additional clamping ring are coupled to one another (in a rotationally fixed manner) by rotation in the clamping direction, it is possible and advantageous for the internal thread sections to be or be arranged offset in the circumferential direction relative to the internal thread regions. In particular, the internal thread sections can be or are arranged offset in the circumferential direction relative to the internal thread regions in such a way that the internal thread sections in combination with the internal thread regions enclose the circumference of the external thread structure by at least 270° and preferably by at least 330° or by at least 340° or by at least 350° and particularly preferably substantially completely (360°). The internal thread sections are preferably arranged offset in the circumferential direction relative to the internal thread regions when the clamping ring unit and the additional clamping ring are coupled to one another (in a rotationally fixed manner) by rotation in the clamping direction.

[0023] An offset arrangement is understood in particular to mean that the internal thread sections are arranged at different angular positions than the internal thread regions. In particular, the internal thread sections and the internal thread regions are lined up in the circumferential direction in the coupled state such that they enclose the circumference of the external thread structure as largely as possible. In particular, in the coupled state, one internal thread section each, together with one internal thread region, encloses a circumferential section of the external thread structure that is larger than a circumferential section of an individual recess section. In particular, in the coupled state, the internal thread sections and the internal thread regions form an annular screw-nut structure that can no longer be (completely) disengaged from the external thread structure by turning in the clamping direction.

[0024] It is possible and advantageous for the internal thread sections to be displaceable in the axial direction relative to the internal thread regions. Such axial displacement (which can also be referred to as translational movement) allows the internal thread sections to be arranged offset in the axial direction relative to the internal thread regions. This then results in, in particular, a quick adjustment mode. In particular, changing the direction of the translational movement makes it possible to switch between the quick adjustment mode and a rotary clamping mode.

[0025] It is preferred and advantageous that the internal thread regions correspond to the recess sections and the external thread sections correspond to the decoupling regions, so that the additional clamping ring can be positioned by rotation (relative to the clamping jaws) and / or axial displacement (relative to the clamping ring unit) such that the internal thread regions are no longer in engagement with the external thread sections. In particular, the internal thread regions and / or the decoupling regions of the additional clamping ring are distributed at the same angular positions over the circumference as the internal thread sections and the decoupling sections of the clamping ring unit.

[0026] Preferably, by turning the clamping ring unit in the release direction, the clamping ring unit and the additional clamping ring can be coupled to one another in a rotationally fixed manner (with respect to the release direction). In particular, the clamping ring unit and the additional clamping ring can then only be turned further in the release direction together. When turning further in the release direction, the clamping ring unit and the additional clamping ring are preferably aligned with one another in such a way that the decoupling sections coincide with the decoupling areas and / or that the internal thread sections coincide with the internal thread areas. Correspondence is understood here in particular to mean an arrangement at the same angle of rotation.In other words, the decoupling sections and the decoupling areas are aligned at the same angle of rotation and / or the internal thread sections and the internal thread areas are aligned at the same angle of rotation when the clamping ring unit and the additional clamping ring are coupled to one another in a rotationally fixed manner in the release direction.

[0027] It is preferred and advantageous that the clamping ring unit and the additional clamping ring can be positioned by rotating them together in the release direction such that neither the internal thread sections nor the internal thread areas are in engagement with the external thread sections. The joint rotation can also be achieved by the clamping ring unit and the additional clamping ring being stationary while the clamping jaw device rotates. If the clamping ring unit and the additional clamping ring are coupled to one another by rotating them in the release direction, they can be positioned such that neither the internal thread sections nor the internal thread areas are in engagement with the external thread sections. The joint rotation can comprise a translational movement of the clamping ring unit or the additional clamping ring.

[0028] In an advantageous embodiment, a quick-adjustment mode can be activated by positioning the clamping ring unit and additional clamping ring such that neither the internal thread sections nor the internal thread areas engage the external thread sections. In particular, the chuck device can be operated in a quick-adjustment mode.

[0029] In particular, in quick-adjustment mode, the clamping jaws can be clamped against the object by axially displacing the clamping jaws relative to the clamping ring unit and the additional clamping ring. In particular, when neither the internal thread sections nor the internal thread areas are engaged with the external thread sections, the clamping ring unit and the additional clamping ring can be axially displaced relative to the clamping jaw assembly. This allows the clamping jaws to be quickly adjusted even over larger ranges.

[0030] In particular, the clamping jaws are movable in the axial direction relative to the clamping ring unit and to the additional clamping ring. Preferably, the clamping ring unit and the additional clamping ring remain stationary while the clamping jaws move in the axial direction. In particular, the clamping jaws are movable in the direction of their longitudinal axis. In particular, the clamping jaws are movable relative to the supporting body unit. In particular, the clamping jaws move in the direction of the receiving end when they go into the clamping position. In particular, the clamping jaws move in the direction of the drive end when they go into the open position. In the quick adjustment mode, the clamping ring unit and the additional clamping ring are coupled to one another, in particular (in the second rotation angle position). In the quick adjustment mode, the clamping ring unit and the additional clamping ring are coupled to one another, in particular by means of the second driver unit.In quick-adjustment mode, the clamping ring unit and the additional clamping ring can only be rotated together in the release direction. This makes quick-adjustment mode particularly easy and convenient to access by turning the clamping sleeve. It is not necessary to adjust the clamping ring unit and the additional clamping ring individually.

[0031] In particular, the quick adjustment mode can be (re)deactivated by further turning them together in the loosening direction. In particular, deactivation occurs when a position is reached in which the internal thread sections and / or the internal thread areas are again engaged with the external thread sections. In particular, the quick adjustment mode can be (re)activated by further turning them together in the loosening direction (when a position is reached in which neither the internal thread sections nor the internal thread areas are engaged with the external thread sections).

[0032] It is also possible, however, that the quick adjustment mode cannot be deactivated again by continuing to turn together in the release direction. This means that once the quick adjustment mode has been activated, it cannot be deactivated again by accidentally continuing to turn in the release direction. In this case, for example, a rotation limit in the release direction is provided for the clamping ring unit and / or the additional clamping ring. In this case, the quick adjustment mode can only be deactivated by moving the clamping ring unit and / or the additional clamping ring (by turning the clamping sleeve) in the clamping direction. The rotation limit can, for example, be provided by a positive-locking fit of the clamping ring unit and / or the additional clamping ring on the clamping sleeve and / or on the chuck base body.

[0033] In quick-adjustment mode, the clamping jaws can be pressed into the open position, particularly against the force of a pre-tensioning device. This can be done, for example, by the drill being pressed against the clamping jaws. In particular, the clamping jaws are pre-tensioned into the clamped position by the pre-tensioning device. This allows the object inserted in quick-adjustment mode to be directly secured so that it does not fall out of the drill chuck during clamping. In particular, the clamping jaws are pre-tensioned into the clamped position by means of a pre-tensioning device in quick-adjustment mode.

[0034] In particular, in the quick-adjustment mode, the internal thread sections and the internal thread areas are arranged, with respect to their angle of rotation, where the recess sections are located. In particular, in the quick-adjustment mode, the decoupling sections and the decoupling areas are arranged, with respect to their angle of rotation, where the external thread sections are located.

[0035] In an advantageous development, a rotary clamping mode is activated when the clamping ring unit and the additional clamping ring are coupled to one another in a rotationally fixed manner (by means of the first driver unit) by rotation in the clamping direction. The rotary clamping mode can preferably also be activated when the clamping ring unit and the additional clamping ring are positioned such that the internal thread regions and the internal thread sections lie on a common circumferential line. In particular, the chuck device can be operated in a rotary clamping mode. In particular, the clamping jaws can be clamped against the object in the rotary clamping mode by the clamping ring unit and the additional clamping ring being rotated relative to the clamping jaw device in the clamping direction. It is advantageous and preferred that the rotary clamping mode remains active at least as long as the clamping ring unit and the additional clamping ring are rotated together (in the coupled state) in the clamping direction.In particular, the rotary clamping mode remains active for more than one revolution.

[0036] In the rotary clamping mode, the internal thread sections and / or the internal thread regions are preferably always at least partially engaged with the external thread sections. In particular, activating the quick adjustment mode by rotating the clamping ring unit and / or the additional clamping ring in the clamping direction is impossible. This is achieved in particular by ensuring that at least some of the internal thread sections and / or the internal thread region are always engaged with the external thread sections when the clamping ring unit and the additional clamping ring are coupled and rotated together in the clamping direction.

[0037] Preferably, the rotary clamping mode can be deactivated (only) by rotating the clamping ring unit and the additional clamping ring in the release direction until neither the internal thread sections nor the internal thread areas are in engagement with the external thread sections. In particular, the quick adjustment mode is then automatically reactivated. In particular, the rotary clamping mode can be deactivated (only) by rotating the clamping sleeve in the release direction.

[0038] It is preferred and advantageous that the number of external thread sections is equal to the number of decoupling sections and preferably also equal to the number of decoupling regions. It is also preferred and advantageous that the number of recess sections is equal to the number of internal thread sections and preferably also equal to the number of internal thread regions. In particular, the number of external thread sections is equal to the number of recess sections. In particular, the number of decoupling sections is equal to the number of internal thread sections. In particular, the number of decoupling regions is equal to the number of internal thread regions. In particular, the external thread sections and the recess sections are distributed symmetrically over the circumference. In particular, the decoupling sections and the internal thread sections are distributed symmetrically over the circumference.In particular, the decoupling areas and the internal thread areas are distributed symmetrically around the circumference. This allows the quick adjustment mode to be activated particularly quickly with a slight rotation in the release direction.

[0039] In particular, the external thread sections and the decoupling sections and the decoupling regions are each distributed at (substantially) equal angular intervals around the circumference. In particular, the recess sections and the internal thread sections and the internal thread regions are each distributed at equal angular intervals around the circumference. This allows these structures to be aligned at corresponding angular positions by relatively rotating their associated components.

[0040] In particular, at least two external thread sections and / or at least two recess sections are provided. It is also possible for at least three external thread sections and / or at least three recess sections to be provided. In particular, the number is determined as a function of the design of the chuck device. If the external thread structure is arranged on the clamping jaws, then preferably as many external thread sections are provided as there are clamping jaws. In particular, at least three clamping jaws are provided. If the external thread structure is arranged outside the clamping jaws and in particular on the support body unit, then preferably at least two or even at least three external thread sections are provided.

[0041] The clamping ring unit and the additional clamping ring are preferably arranged axially one behind the other. In particular, the clamping ring unit and the clamping jaw device are arranged about a common axis of rotation or are rotatable about a common axis of rotation. The axis of rotation corresponds in particular to the axis of rotation of the chuck device. In particular, the clamping ring unit and the clamping jaw device are arranged coaxially at least in sections. In particular, the internal thread regions and the internal thread sections are arranged axially one behind the other. In particular, the internal thread sections and the internal thread regions are rotatable about a common axis of rotation and in particular about the external thread structure. In particular, the clamping ring unit and the additional clamping ring can be screwed to the external thread structure individually and / or coupled to one another.

[0042] In an advantageous embodiment, the external thread sections are arranged on the clamping jaws. In particular, the recess sections are then provided by empty spaces between the clamping jaws. Alternatively or additionally, it can be provided that the external thread structure is at least partially arranged (in particular the external thread sections and / or the recess sections) on the support body unit. In particular, the recess sections are then designed to be threadless and / or to be recessed relative to the external thread sections.

[0043] The arrangement of the external thread sections on the clamping jaws is particularly advantageous in a chuck device which is used in a mobile machine and for example in a hand drill or cordless screwdriver.

[0044] In particular, the external thread structure is conical. In particular, the internal thread structure and the internal thread arrangement are then also conical. In particular, the clamping jaws are each at an angle to the axis of rotation of the clamping sleeve device and / or to a longitudinal axis of the chuck device with respect to their longitudinal axes. In particular, the clamping jaws are received in the support body unit with respect to their longitudinal axes such that they run towards one another in the direction of the receiving end. In particular, the clamping jaws diverge in the direction of the synchronization ring unit and / or the drive end. In particular, the clamping jaws are arranged in the support body unit such that they clamp a conical space between them. In particular, the clamping jaws extend from radially outwards in the direction of the receiving end to radially inwards into the support body unit.

[0045] In particular, the clamping jaws are rod-shaped. It is possible and advantageous for the clamping jaws to be made from a cylindrical base body. In particular, a cylindrical base body is equipped with an external thread section. In addition, a guide structure can be formed at one axial end of the base body, which interacts with the synchronization guide. A contact area for the object can be formed at another axial end of the base body.

[0046] In particular, the clamping jaws and preferably the entire clamping jaw assembly remain stationary when the clamping sleeve is rotated in the clamping direction or in the release direction. In particular, when the clamping sleeve is rotated, the clamping jaw assembly can be supported on a machine equipped with the chuck device (with respect to the rotational movement), while the clamping ring unit and the additional clamping ring rotate with it. It is also possible for the clamping sleeve to be held (manually) while the clamping jaw assembly is rotated by means of the machine in order to screw the clamping ring unit and the additional clamping ring to the clamping jaws.

[0047] In particular, the clamping jaw device can be driven by means of the machine, while the clamping sleeve device and the additional clamping ring rotate centrally. In particular, the external thread structure comprises at least one right-hand thread or is designed as such. In particular, power flow from the machine to the drill does not occur via the clamping sleeve device and the additional clamping ring. This ensures that the drill remains securely clamped, regardless of the drive direction of rotation. This is particularly important with a cordless screwdriver or the like. Power is not transmitted from the machine to the drill, in particular, via the threaded connection between the clamping sleeve device and the clamping jaw device.

[0048] In particular, the pretensioning device is arranged behind the clamping jaws and, in particular, in the axial direction between the clamping jaws and a drive end. In particular, the pretensioning device is arranged closer to the drive end than to the receiving end. In particular, the pretensioning device is not arranged radially between the clamping jaws and the support body unit.

[0049] Preferably, the clamping ring unit and the additional clamping ring can be screwed onto the clamping jaws by rotating the clamping sleeve in the clamping direction. In particular, this allows the clamping jaws to be moved toward the object. This enables a particularly compact chuck device. In particular, a coaxial arrangement of the clamping ring unit and clamping jaws, as well as of the additional clamping ring and clamping jaws, is provided. In particular, one axis of the polar clamping jaw arrangement is arranged coaxially to the clamping ring unit and the additional clamping ring. In particular, the clamping jaws are arranged radially inward, while the clamping ring unit and the additional clamping ring are arranged radially outward.

[0050] In an advantageous development, a synchronization ring unit with radially extending synchronization guides is provided. The synchronization guides each comprise at least one groove. In particular, the clamping jaws are each guided in a synchronization guide in the radial direction. In particular, the clamping jaws can therefore only move together to the same extent relative to one another (so that the object is always preloaded essentially cocentrically with respect to the longitudinal axis of the chuck device). The synchronization ring unit is arranged in particular at one axial end of the clamping jaw device. In particular, at the axial end facing the drive end and opposite a receiving end.

[0051] A synchronization ring unit is particularly advantageous when the external thread sections are arranged on the clamping jaws or when the clamping jaws are angled to the rotation axis. Otherwise, the clamping jaws could move / displace unevenly in quick-adjustment mode if, for example, a drill bit were not pressed completely centrally onto the jaws. This would result in one clamping jaw moving further back than the other, and the drill bit would therefore not be inserted centrally. The synchronization ring unit presented here also requires very little installation space and at the same time ensures improved reliability of the clamping process. In particular, the pretensioning device (as viewed from the holder end) is arranged behind the synchronization ring unit.

[0052] In particular, the synchronization ring unit is movable in the axial direction (relative to the support body unit). In particular, the synchronization ring unit moves axially together with the clamping jaws when the clamping jaws move into the clamping position or the release position. In particular, the drive-side ends of the clamping jaws move closer together when the synchronization ring unit moves axially toward the receiving end. When the quick adjustment mode is active and the external thread structure is no longer engaged with the internal thread structure and the internal thread arrangement, the clamping jaws are pressed toward the receiving end, in particular by a preloading unit pressing against the synchronization ring unit.

[0053] In particular, the drive-side ends of the clamping jaws define a circle. In particular, the diameter of the circle becomes smaller when the clamping jaws move towards the receiving end. In particular, the diameter of the circle becomes larger when the clamping jaws move towards the drive end. In particular, the synchronization ring unit ensures that the drive-side ends of the clamping jaws are always arranged on a circumference of the circle when the clamping jaws move in the axial direction. In particular, the synchronization ring unit ensures that the drive-side ends of the clamping jaws move away from each other evenly and move towards each other evenly when they are moved into the open position or clamped position.In particular, due to the synchronization ring unit, the drive-side ends of the clamping jaws always remain on the circumference of the circle when the clamping jaws are pressed towards the drive end by an object to be clamped in quick adjustment mode.

[0054] In particular, the synchronization guides are firmly connected to one another. In particular, the synchronization guides of the synchronization ring unit are positioned in a fixed and, in particular, unchangeable alignment with one another. In particular, the position of the synchronization guides relative to one another is unchangeable. This ensures that the drive-side ends of the clamping jaws always remain on a common circumference when the clamping jaws are moved in the axial direction and / or in the direction of their longitudinal axis. For example, the synchronization guides are formed in a solid body, for example, in a disc.

[0055] The support body unit can comprise a central receiving bore for receiving the object. The support body unit can comprise guide bores for each clamping jaw. The clamping jaws can run through the guide bore from the radial outside, where they can be screwed to the clamping sleeve device, to the radial inside to the receiving bore (and to the object). In particular, the guide bores are arranged at an angle so that they correspond to the inclination of the longitudinal axis of the clamping jaws. In particular, the clamping jaws each have a clamping surface for the object at one axial end. In particular, the clamping jaws each have at least one guide section at another axial end. In particular, the guide section serves to be received in the synchronization guide. In particular, the clamping jaws move in the direction of their longitudinal axis when they are moved into the clamping position by screwing on the clamping ring unit and the additional clamping ring.When turning in the release direction, the clamping jaws move along their longitudinal axis, particularly in an opposite direction.

[0056] The arrangement of the external thread structure on the support body unit is particularly advantageous for such a chuck device which is used in a stationary machine.

[0057] In an advantageous embodiment, it is provided that the clamping jaw device can be set in a rotary movement by turning the clamping sleeve in the clamping direction. Preferably, the rotary movement unscrews the support body unit (which is equipped with the external thread structure) from the clamping ring unit and from the additional clamping ring. Preferably, the unscrewing causes the clamping jaws to press against the clamping sleeve. In particular, the clamping jaws thereby move against the object or into the clamping position. Such a design offers many advantages, particularly in the case of a stationary machine, since, for example, particularly precise clamping is possible. Preferably, the clamping jaw device can be set in a rotary movement by turning the clamping sleeve in the release direction, wherein this rotary movement screws the support body unit into the clamping ring unit and the additional clamping ring.In particular, by screwing in the clamping jaws are released from the clamping sleeve so that they move into the release position.

[0058] In a version where the external thread structure on the

[0059] If the external thread structure is arranged on the support body unit, it is particularly cylindrical. In particular, the external thread structure is formed on a cylindrical portion of the support body unit. In particular, the internal thread structure and the internal thread arrangement are then also cylindrical. The support body unit can comprise a jaw guide unit for radially guiding the clamping jaws. In particular, the jaw guide unit has radial guide grooves in each of which a clamping jaw is guided. In particular, the clamping jaws are mounted on the support body unit so as to be displaceable in the radial direction.

[0060] In particular, the clamping ring unit and the additional clamping ring can be supported manually (by muscle power) using a handle and / or on a machine equipped with the chuck device (with respect to the rotational movement) when rotating the clamping sleeve, while the clamping jaw device rotates together with the clamping sleeve. In particular, the chuck device then comprises a chuck base body. In particular, the chuck base body is connectable to the machine to drive the chuck device. In particular, the chuck base body comprises a connecting unit for this purpose. In particular, the clamping ring unit and the additional clamping ring are held in the chuck base body when rotating the clamping sleeve, while the clamping jaw device and the clamping sleeve rotate. A coupling device is provided for this purpose. It should be noted that in this variant, the clamping ring unit and the additional clamping ring also rotate relative to the clamping jaw device.

[0061] In particular, the coupling device is suitable and designed to couple the clamping ring unit (and optionally the additional clamping ring) to the chuck base body in a rotationally fixed manner. The coupling device is particularly suitable and designed to couple the chuck base body and the clamping ring unit (and optionally the additional clamping ring) to one another in such a way that a torque can be transmitted from the chuck base body to the clamping ring unit (and optionally to the additional clamping ring). The coupling device is particularly suitable and designed to permit a relative movement between the clamping ring unit and the additional clamping ring (within a defined rotation angle range). The relative movement is dimensioned such that the internal thread structure and the internal thread arrangement can be aligned with one another in such a way that the quick adjustment mode and the rotation mode can be activated.In particular, the relative movement between the clamping ring unit and the additional clamping ring is limited by a driver device (described in more detail below).

[0062] In particular, torque transmission between the chuck base body and the clamping jaw assembly occurs via the internal thread structure and preferably also via the internal thread arrangement and the external thread structure. In particular, torque transmission occurs via the clamping ring unit and preferably also via the additional clamping ring. In particular, power transmission from the machine to the drill occurs via the threaded connection between the clamping sleeve assembly and the clamping jaw assembly. In this case, torque transmission also occurs, in particular, via the coupling device.

[0063] In particular, the external thread structure and the internal thread structure and the internal thread arrangement each comprise at least one left-hand thread or are designed as such. A left-hand thread is provided in particular for a right-hand rotating machine. If, however, a left-hand rotating machine is used, a corresponding right-hand thread is provided. This ensures that the object remains firmly clamped when drilling clockwise and does not accidentally come loose. Additionally, a technical device can also be integrated that locks the chuck device, thus allowing it to be used reliably in both directions of rotation.

[0064] In particular, the clamping sleeve device comprises at least one coupling sleeve. In particular, the coupling sleeve is suitable and designed to couple a rotational movement of the clamping sleeve to the clamping jaw device (in particular at least to the clamping jaws and the support body unit), so that the clamping jaw device rotates along with it. In particular, the coupling sleeve rotationally couples the clamping sleeve to the clamping jaw device and at least to its clamping jaws and / or support body unit. In particular, the coupling sleeve is rotatably mounted on the chuck base body by means of a bearing device. The coupling sleeve can comprise at least two components, which are in particular screwed together. This enables particularly simple assembly of the chuck device. The coupling sleeve can also be formed as a single piece. In particular, the coupling sleeve comprises receiving slots in which the clamping jaws are each received in a form-fitting manner (with respect to the direction of rotation).In particular, the clamping jaws are accommodated in the coupling sleeve and, in particular, in its receiving slots, so that they can be displaced in the axial direction. In particular, the clamping jaws are displaced in the receiving slots when the clamping sleeve is rotated.

[0065] In particular, the longitudinal axes of the clamping jaws each run parallel to the axis of rotation or to the longitudinal axis of the chuck device. In particular, a radial inner side of the clamping jaws that comes into contact with the object is designed parallel to the longitudinal axis or to the axis of rotation of the chuck device. In particular, a radially outward-facing outer side of the clamping jaws is designed obliquely to the longitudinal axis or axis of rotation of the chuck device. In particular, the outer sides of the clamping jaws correspond to a radial inner side of the clamping sleeve device, which comes into contact with the clamping jaws. In particular, the clamping jaws are moved into the clamping position by displacing the clamping jaws in the axial direction relative to the clamping sleeve device and thereby pressing them against the clamping sleeve device according to the wedge principle.In particular, the support body unit, together with the clamping jaws, is automatically moved into the clamping position by means of a pre-tensioning device when the quick-adjustment mode is selected. Upon insertion of the object into the chuck, the object can then be pressed against the clamping jaws, causing the clamping jaws, together with the support body unit, to retract toward the open position. In this process, the pre-tensioning device, in particular, is pre-tensioned.

[0066] In particular, the clamping jaws, together with the supporting body unit, are axially displaceable in the quick-adjustment mode. In particular, the axial movement of the clamping jaws and the supporting body unit occurs relative to the clamping ring unit and the additional clamping ring. In particular, the clamping ring unit and the additional clamping ring remain stationary, while the supporting body unit and the clamping jaws are axially displaced in the quick-adjustment mode.

[0067] In particular, in rotary clamping mode, the clamping jaws and the support body unit are screwed into the clamping ring unit and the additional clamping ring. In particular, the clamping ring unit and the additional clamping ring remain stationary, while the clamping jaws and the support body unit move in the axial direction. In particular, the axial movement when the clamping sleeve is rotated in the clamping direction occurs in the direction of the receiving end of the chuck device. In particular, the axial movement of the clamping jaws and the support body unit occurs in the direction of the drive end of the chuck device when the clamping sleeve is rotated in the release direction.

[0068] In particular, the clamping jaws and the supporting body unit rotate (in the same direction) when the clamping sleeve is rotated in the loosening direction or in the clamping direction. In particular, the coupling sleeve also rotates when the clamping sleeve is rotated. In particular, the rotary movement of the clamping sleeve (during clamping) is transmitted by the coupling sleeve to the clamping jaw device and in particular to the clamping jaws and in particular also to the supporting body unit. In particular, at least the supporting body unit is screwed into or unscrewed from the clamping ring unit and / or the additional clamping ring by rotating the clamping sleeve.

[0069] The pre-tensioning device is supported in particular on the support body unit and on the chuck base body and / or on the clamping ring unit. In particular, the pre-tensioning device rests with one end on the support body unit and with an opposite end on the chuck base body and / or on the clamping ring unit. In particular, the pre-tensioning device presses the support body unit away from the chuck base body and / or from the clamping ring unit in the axial direction. The chuck base body can comprise at least one handle section for manual rotation. This allows the machine to be rotated, for example in order to align a drill bit with the workpiece.

[0070] In particular, the clamping jaws, the support body unit, and the coupling sleeve rotate when the clamping sleeve is rotated. In particular, the clamping ring unit and the additional clamping ring are stationary and preferably remain fixed in place on the chuck base body when the clamping sleeve is rotated in rotary clamping mode. By unscrewing the support body unit from the clamping ring unit and from the additional clamping ring, the clamping jaws are brought into the clamping position. By screwing the support body unit into the clamping ring unit and into the additional clamping ring, the clamping jaws are brought into the open position.

[0071] The method according to the invention serves to operate a chuck device as described here. The method according to the invention also achieves the above-mentioned object particularly advantageously. In particular, the method is designed such that the functions of the chuck device described here can be implemented. In particular, the chuck device is suitable and designed to implement the steps and functions described here. The clamping ring arrangement according to the invention is for use in a chuck device, preferably as described here. The clamping ring arrangement comprises a clamping ring unit and an additional clamping ring. In particular, the clamping ring arrangement can be converted into an arrangement for a quick adjustment mode and into an arrangement for a rotary clamping mode by rotating the clamping ring unit relative to the additional clamping ring.In particular, the clamping ring unit and the additional clamping ring are designed as described here.

[0072] In particular, the manual actuation of the chuck device for clamping and releasing the object occurs by rotating the clamping sleeve. The clamping sleeve is designed, in particular, as a sleeve and / or a ring. Other geometries are also possible. In particular, the clamping sleeve provides a radial outer side of the clamping sleeve device. In particular, the clamping sleeve and the clamping ring unit can be or are coupled to one another in a rotationally fixed manner (in particular by means of a coupling arrangement). In particular, at least in the rotational clamping mode, the clamping sleeve bears positively (with respect to the rotational movement in the clamping direction and / or release direction) against the clamping ring unit. Preferably, the clamping sleeve and the clamping ring unit are provided by separate components. The clamping sleeve and the clamping ring unit can be connected to one another in one piece.

[0073] The chuck device presented here can preferably be used on a mobile machine, for example on a portable drill or hand drill and / or on a cordless screwdriver. The chuck device described here can preferably be used on a stationary machine, for example on a machine tool (e.g. pillar drill, column drill, radial drill, milling machine, lathe). The applicant reserves the right to claim a machine with a chuck device. The applicant reserves the right to claim a hand-held machine with a chuck device. The hand-held machine is, for example, a hand drill or a cordless screwdriver. The applicant reserves the right to claim a stationary machine with a chuck device.

[0074] The chuck device comprises, in particular, a drive end that can be coupled to a machine for driving the chuck device. The chuck device comprises, in particular, a receiving end that is designed to receive the object. In particular, the receiving end and the drive end are axially opposite one another.

[0075] When rotation is mentioned in the context of the present invention, this is understood in particular to mean a relative rotational movement of one component to another component. In particular, rotating the clamping ring unit or the additional clamping ring means that the clamping ring unit or the additional clamping ring is rotated relative to the clamping jaw device and preferably to the support body unit and / or to the clamping jaws. The clamping ring unit or the additional clamping ring can rotate while the other component is stationary or rotates more slowly or in the other direction. The component can also rotate while the clamping ring unit or the additional clamping ring is stationary or rotates more slowly or in the other direction.

[0076] In particular, the internal thread sections can be brought into engagement with the external thread sections by rotating the clamping ring unit in the clamping direction. In particular, the internal thread sections can be brought out of engagement with the external thread sections by rotating the clamping ring unit in the release direction. In particular, the internal thread regions can be brought into engagement with the external thread sections by rotating the additional clamping ring in the clamping direction. In particular, the internal thread regions can be brought out of engagement with the external thread sections by rotating the additional clamping ring in the release direction.

[0077] In quick adjustment mode, the decoupling sections and the decoupling areas are particularly aligned at the same angle of rotation. In quick adjustment mode, the internal thread sections and the internal thread areas are particularly aligned at the same angle of rotation. In rotary clamping mode, the decoupling sections and the decoupling areas are particularly offset with respect to their angle of rotation. In rotary clamping mode, the internal thread sections and the internal thread areas are particularly offset with respect to their angle of rotation.

[0078] The chuck device comprises, in particular, a driver device with at least two driver units, comprising at least one first driver unit and at least one second driver unit. In particular, the clamping ring unit and the additional clamping ring can be coupled to one another in a rotationally fixed manner by rotating the clamping ring unit in the clamping direction using at least one first driver unit. In particular, the clamping ring unit and the additional clamping ring can be coupled to one another in a rotationally fixed manner by rotating the clamping ring unit in the release direction using at least one second driver unit.

[0079] The first driver unit is particularly suitable and designed to connect the clamping ring unit and the additional clamping ring to one another in a form-fitting and / or force-fitting manner with respect to the clamping direction. As a result of this (form-fitting) connection, the clamping ring unit and the additional clamping ring can in particular only be rotated further in the clamping direction together. In particular, the second driver unit is suitable and designed to connect the clamping ring unit and the additional clamping ring to one another in a form-fitting and / or force-fitting manner with respect to the release direction. As a result of this (form-fitting) connection, the clamping ring unit and the additional clamping ring can in particular only be rotated further in the release direction together.

[0080] The driver units can each comprise at least two mutually corresponding drivers. In particular, at least one driver is arranged on the clamping ring unit and at least one driver is arranged on the additional clamping ring. Of the at least two mutually corresponding drivers of a driver unit, at least one driver can also be arranged on the clamping sleeve and at least one driver on the clamping ring unit or at least one driver on the clamping sleeve and at least one driver on the additional clamping ring. In particular, the drivers on the clamping sleeve are arranged in such a way that the driver of the first driver unit lies in a different angle of rotation range than the driver of the second driver unit. Such drivers can be, for example, stops, projections, noses, depressions, grooves, teeth or other structures suitable for positive or non-positive locking in one direction of rotation.

[0081] As long as the clamping ring unit and the additional clamping ring are coupled to one another by means of the first driver unit and are rotated further in the clamping direction, at least some of the internal thread sections and / or the internal thread areas are always in engagement with the external thread sections. As long as the clamping ring unit and the additional clamping ring are coupled to one another by means of the first driver unit and are rotated further in the clamping direction, the rotary clamping mode remains active and the quick adjustment mode remains inactive. As long as the clamping ring unit and the additional clamping ring are coupled to one another by means of the second driver unit and are rotated further in the release direction, the decoupling sections and the decoupling areas are aligned at the same angle of rotation.

[0082] In particular, the clamping ring unit and the additional clamping ring are aligned in a first rotational angle position by means of the first driver unit. In particular, the clamping ring unit and the additional clamping ring are aligned with one another in a second rotational angle position by means of the second driver unit. In particular, the first rotational angle position enables the rotational clamping mode and in particular prevents the quick adjustment mode. In particular, the second rotational angle position enables the quick adjustment mode and in particular prevents the rotational clamping mode. In the rotational clamping mode, the clamping ring unit and the additional clamping ring are coupled in the first angular position. In the quick adjustment mode, the clamping ring unit and the additional clamping ring are coupled in the second rotational angle position.

[0083] In the first rotational angle position, the internal thread sections and the internal thread regions are arranged, in particular, at different angular positions or offset from one another. In the second rotational angle position, the decoupling sections and the decoupling regions are, in particular, aligned at the same rotational angle or correspondingly. In particular, the internal thread regions and the internal thread sections are also aligned at the same rotational angle or correspondingly in the second rotational angle position.

[0084] In particular, the chuck device comprises at least one displacement device. In particular, the displacement device is suitable and designed to convert a rotational movement of the additional clamping ring and / or the clamping ring unit into a translational movement of the additional clamping ring relative to the clamping ring unit.

[0085] In particular, the displacement device comprises at least two corresponding wedge regions which can be placed against one another (e.g. by rotating the clamping ring unit and / or the additional clamping ring). In particular, the displacement device comprises at least one (first) wedge region which is arranged on the clamping ring unit and at least one (second) wedge region which is arranged on the additional clamping ring. In particular, the wedge regions run obliquely to the axis of rotation and / or obliquely to the circumferential direction of the additional clamping ring or the clamping ring unit.

[0086] In particular, the displacement device is designed such that when the additional clamping ring and / or the clamping ring unit are rotated, the corresponding wedge regions are pressed against one another. By pressing them together, an axial force is created, so that the wedge regions slide along one another. By pressing them together, the additional clamping ring and the clamping ring unit are moved, in particular relative to one another in the axial direction. In particular, the pressing against one another causes a translational movement of the additional clamping ring relative to the clamping ring unit (in the axial direction).

[0087] In other words, the rotational movement presses the corresponding wedge regions together, resulting in an axial force that leads to a translational movement of the clamping ring unit relative to the additional clamping ring (hereinafter referred to as translational relative movement). In particular, the translational movement runs parallel to the axis of rotation of the rotational movement. Preferably, the internal thread sections or the internal thread regions are moved relative to the external thread sections due to the translational relative movement. In the context of the present invention, this state, in which the corresponding wedge regions are pressed together, can also be referred to as the "coupled state" (the additional clamping ring and the clamping ring unit are then coupled to one another).In all embodiments, it is preferred and advantageous that the clamping ring unit and the additional clamping ring can be coupled to one another by means of the driver device and / or by means of the displacement device.

[0088] In particular, the corresponding wedge regions are designed such that a distance between the internal thread sections or the internal thread sections and the external thread sections is increased when the translational relative movement is generated by a rotational movement in the loosening direction. In particular, the corresponding wedge regions are designed such that a distance between the internal thread sections or the internal thread sections and the external thread sections is reduced when the translational relative movement is generated by a rotational movement in the clamping direction.

[0089] It is possible for the displacement device to comprise at least one first wedge device and at least one second wedge device. The wedge devices in particular each comprise at least two corresponding wedge regions (which can be pressed against one another by rotating the additional clamping ring and / or the clamping ring unit). It is also possible for the first and the second wedge device to have common (identical) corresponding wedge regions. The first wedge device is in particular designed such that the translational relative movement can be generated by rotating the additional clamping ring and / or the clamping ring unit in the release direction. The second wedge device is in particular designed such that the translational relative movement can be generated by rotating the additional clamping ring and / or the clamping ring unit in the clamping direction.In particular, the translational relative movement of the first wedge device runs in the opposite direction to the translational relative movement of the second wedge device.

[0090] If the translational relative movement is generated by the additional clamping ring and / or the clamping ring unit (starting from the rotary clamping mode) being rotated in the release direction, in particular the distance between the internal thread sections or the internal thread areas and the external thread sections is increased. In particular, this brings the internal thread sections or the internal thread areas out of engagement with the external thread sections. In particular, this deactivates the rotary clamping mode. In particular, this activates the quick adjustment mode. If the additional clamping ring and / or the clamping ring unit are then rotated further in the release direction (in the quick adjustment mode), preferably (always) neither the internal thread sections nor the internal thread areas are in engagement with the external thread sections.In other words, when the additional clamping ring and / or the clamping ring unit are then rotated further in the loosening direction (in quick adjustment mode), the internal thread sections and the internal thread areas are preferably always out of engagement with the external thread sections.

[0091] If the translational relative movement is generated by the additional clamping ring and / or the clamping ring unit (starting from the quick adjustment mode) being rotated in the clamping direction, in particular a distance between the internal thread sections or the internal thread regions and the external thread sections is reduced. In particular, the internal thread sections or the internal thread regions are thereby brought into engagement with the external thread sections. In particular, the quick adjustment mode is thereby deactivated. In particular, the rotary clamping mode is thereby activated. If the additional clamping ring and / or the clamping ring unit are then rotated further in the clamping direction (in the rotary clamping mode), preferably at least some of the internal thread sections and / or the internal thread regions are always in engagement with the external thread sections.

[0092] In particular, the displacement device is suitable and designed to convert a rotational movement in the release direction into a translational movement, in which the internal thread sections move away from the internal thread regions in the axial direction (so that they then have, in particular, an axial offset from one another). In particular, the displacement device is suitable and designed to convert a rotational movement in the clamping direction such that the internal thread sections and the internal thread regions move towards one another (so that they are then preferably arranged on a common circumferential line).

[0093] It is possible for the clamping ring unit to move in the axial direction relative to the clamping jaws, while the additional clamping ring does not experience any axial movement relative to the clamping jaws. However, it is also possible for the additional clamping ring to move in the axial direction relative to the clamping jaws, while the clamping ring unit does not experience any axial movement relative to the clamping jaws. In particular, the clamping ring that moves in the axial direction relative to the clamping jaws experiences an increase in the distance between its thread (i.e. either the internal thread sections or the internal thread areas) and the external thread sections of the clamping jaws.

[0094] In an advantageous variant, the internal thread sections and the internal thread areas lie on a common circumferential line when the chuck device is in the rotary clamping mode. In particular, the internal thread areas and the internal thread sections have no axial offset from one another in the rotary clamping mode. In particular, the internal thread sections and the internal thread areas have an axial offset from one another when the chuck device is in the quick adjustment mode. In particular, the internal thread sections and the internal thread areas do not lie on a common circumferential line in the quick adjustment mode. Preferably, the axial offset can be adjusted by the translational relative movement. In particular, the clamping ring unit and the additional clamping ring can be pushed into one another section by section by the translational relative movement.

[0095] In an advantageous variant, the internal thread areas and the internal thread sections do not lie on a common circumferential line in both the rotary clamping mode and the quick adjustment mode. In particular, the internal thread sections do not extend between the internal thread areas. In particular, the internal thread areas are axially offset from one another in both the rotary clamping mode and the quick adjustment mode. In particular, the internal thread sections and the internal thread areas each lie on a separate circumferential line. The circumferential line of the internal thread sections is in particular axially spaced from the circumferential line of the internal thread areas.

[0096] The clamping ring unit and the additional clamping ring are mounted on the supporting body unit and / or on the clamping sleeve so as to be movable relative to one another (rotationally and / or translationally). In particular, the additional clamping ring and / or the clamping ring unit can be axially displaced on the supporting body unit and / or on the clamping sleeve. In particular, the clamping ring unit and / or the additional clamping ring are rotatably mounted. In particular, a rotational movement of the clamping sleeve can be transferred to the additional clamping ring and / or to the clamping ring unit.

[0097] It is possible that the additional clamping ring is moved along when the clamping sleeve is turned. In this case, the rotary movement of the additional clamping ring leads in particular to a translational movement of the clamping ring unit. The translational movement of the clamping ring unit preferably shifts its internal thread sections relative to the external thread sections of the clamping jaws. It is also possible that the clamping ring unit is moved along when the clamping sleeve is turned. In this case, the rotary movement of the clamping ring unit leads in particular to a translational movement of the additional clamping ring. The translational movement of the additional clamping ring preferably shifts its internal thread areas relative to the external thread sections of the clamping jaws.

[0098] In particular, in the quick adjustment mode, the external thread sections are not engaged with either the internal thread regions or the internal thread sections. If (in the quick adjustment mode) the internal thread sections are arranged radially spaced from the external thread sections, the internal thread sections are preferably arranged offset in the circumferential direction from the external thread sections. If (in the quick adjustment mode) the internal thread sections are arranged radially spaced from the external thread sections, the internal thread sections are in particular arranged offset in the circumferential direction from the external thread sections.

[0099] It is possible for the clamping ring unit and the additional clamping ring to be rotationally fixedly coupled to one another, independent of any rotational movement or independent of their rotational angular position. This is particularly advantageous in the design with the displacement device. It is also possible for the clamping ring unit and the additional clamping ring to be rotationally fixedly coupled to one another only by rotation in the clamping direction and / or by rotation in the release direction. Such a design is particularly advantageous if the internal thread sections and the internal thread areas are arranged on different circumferential lines in the rotational clamping mode or if a driver device is provided.

[0100] In a design with the driver device, the clamping ring unit and the additional clamping ring are coupled to each other in a rotationally fixed manner, especially when the corresponding driver units are in positive contact with each other. If the corresponding driver units are not in positive contact with each other, the clamping ring unit and the additional clamping ring can be rotated relative to each other.

[0101] In the version with the sliding device, the clamping ring unit and the additional clamping ring are permanently coupled to each other in a rotationally fixed manner. In particular, relative movement between the clamping ring unit and the additional clamping ring is also possible in this variant. In particular, the translational movement also includes a rotational component, so that in this embodiment, the additional clamping ring can also be rotated relative to the clamping ring unit.

[0102] In particular, the clamping ring unit extends with its internal thread sections at least partially into the additional clamping ring. It is also possible for the additional clamping ring to extend with its internal thread areas at least partially into the clamping ring unit. This is particularly the case when the rotary clamping mode is active. In the rotary clamping mode, the internal thread areas extend in particular into the decoupling sections. It is also possible for the internal thread sections to extend into the decoupling areas (in the rotary clamping mode).

[0103] In quick adjustment mode, the internal thread areas are pushed out of the decoupling sections. It is also possible that in quick adjustment mode the internal thread sections are pushed out of the decoupling areas. Because the internal thread areas are arranged in the decoupling sections and / or the internal thread sections are arranged in the decoupling areas, this results in particular in a continuous thread (in the circumferential direction), in which the internal thread sections and the internal thread areas lie on a common circumferential line. If the clamping ring unit and the additional clamping ring are turned further in the clamping direction in this position, the internal thread sections and the internal thread areas are in particular always in engagement with the external thread sections.When the clamping ring unit and the additional clamping ring are rotated in the release direction, the internal thread areas slide out of the decoupling sections and / or the internal thread sections slide out of the decoupling areas, so that upon further rotation in the release direction, the decoupling sections and / or the decoupling areas are brought into alignment with the external thread structure, so that the external thread structure is neither in engagement with the internal thread structure nor with the internal thread arrangement. This is particularly the case in the quick adjustment mode.

[0104] In an advantageous further development, the support body unit comprises at least one shoulder. The additional clamping ring and the clamping ring unit in particular each comprise at least one support element. In particular, the support elements can each be supported on the shoulder in the axial direction. This has the advantage that both the additional clamping ring and the clamping ring unit are supported on the same abutment with regard to the axial direction, namely on the shoulder. This can considerably simplify the production of the synchronous or aligned threads of the additional clamping ring and the clamping ring unit. The support elements can be provided at least partially by the driver device and / or the coupling arrangement. However, it is also possible for the clamping ring unit to be supported on the support body unit via the additional clamping ring or for the additional clamping ring to be supported via the clamping ring unit.

[0105] In an advantageous development, the driver device comprises at least one chamfer. In particular, the chamfer runs at an oblique angle to the axial direction or to the axis of rotation. In particular, the chamfer is formed on a radial outer side of the additional clamping ring and / or the clamping ring unit. In particular, the chamfer runs obliquely in the axial direction across the radial outer side. Preferably, the chamfer is also beveled or rounded in the circumferential direction. In particular, the chamfer is designed as a wedge bevel. In particular, the chamfer is formed on the additional clamping ring. Additionally or alternatively, the chamfer can also be formed on the clamping ring unit. In particular, the chamfer is formed on at least one driver of at least one driver unit.

[0106] Preferably, at least one engagement contour is formed on the clamping sleeve, which corresponds to the at least one chamfer. In particular, the chamfer can slide along the engagement contour relative to the clamping sleeve in the axial direction when the engagement contour is rotated relative to the chamfer. In particular, the engagement contour is rotated relative to the chamfer by rotating the clamping sleeve. In particular, the chamfer and the engagement contour are arranged such that the chamfer slides along the engagement contour relative to the clamping sleeve in the axial direction when the internal thread structure and / or the internal thread arrangement collides with the external thread structure. In particular, the interaction of the chamfer and the engagement contour can exert an axial force on the additional clamping ring (or the clamping ring unit) in the event of such a thread collision, such that the additional clamping ring (or the clamping ring unit) slides along in the axial direction.In particular, the internal thread structure (or the internal thread arrangement) can then engage the next possible thread turn of the external thread structure.

[0107] The clamping ring unit and / or the additional clamping ring are in particular (substantially) designed as closed rings. The clamping ring unit and / or the additional clamping ring can have a slot or the like. The clamping ring unit and / or the additional clamping ring can have an open ring shape. In particular, the clamping ring unit and / or the additional clamping ring are not provided by two or more parts that are loosely arranged in a circumferential direction. In particular, the clamping ring unit and / or the additional clamping ring each provide a screw nut.

[0108] Further advantages and features of the present invention will become apparent from the embodiments which are explained below with reference to the accompanying figures.

[0109] The figures show:

[0110] Fig. 1 is a purely schematic exploded view of a chuck device according to the invention in a side view;

[0111] Fig. 2 the exploded view in a perspective

[0112] Opinion ;

[0113] Fig. 3 the chuck device in a rotary clamping mode in a side view;

[0114] Fig. 4 the chuck device in a

[0115] Quick adjustment mode in a side view;

[0116] Fig. 5 shows the chuck device in a rotary clamping mode in a front view cut along the line AA of Fig. 3;

[0117] Fig. 6 the chuck device in a

[0118] Quick adjustment mode in a front view cut along line BB of Fig. 4;

[0119] Fig. 7 is a purely schematic representation of a clamping ring arrangement according to the invention in a rotary clamping mode in a perspective view;

[0120] Fig. 8 shows the clamping ring arrangement in a quick adjustment mode in a perspective view;

[0121] Fig. 8a-b Variants of the clamping ring arrangement in a perspective view;

[0122] Fig. 8c a variant of the clamping ring arrangement in a

[0123] side view ;

[0124] Fig. 9 is a purely schematic exploded view of another chuck device according to the invention in a side view;

[0125] Fig. 10 shows the exploded view according to Fig. 9 in a perspective view;

[0126] Fig. 11 the chuck device in a rotary clamping mode in a side view;

[0127] Fig. 12 the chuck device in a

[0128] Quick adjustment mode in a side view;

[0129] Fig. 13 shows the chuck device in a rotary clamping mode in a front view cut along the line CC of Fig. 11;

[0130] Fig. 14 the chuck device in a

[0131] Quick adjustment mode in a front view cut along line DD of Fig. 12; Fig. 15 is a purely schematic representation of another clamping ring arrangement according to the invention in a rotary clamping mode in a perspective view;

[0132] Fig. 16 the clamping ring arrangement according to Fig. 15 in a

[0133] Quick adjustment mode in a perspective view;

[0134] Fig. 17 is a purely schematic exploded view of another chuck device according to the invention in a perspective view;

[0135] Fig. 18 is a detailed view of the chuck device of Fig. 17 in a rotary clamping mode in a front view;

[0136] Fig. 19 the chuck device in a direction along the

[0137] Line AA of Fig. 18 sectioned side view;

[0138] Fig. 20 is a detailed view of the chuck device of Fig. 17 in a quick adjustment mode in a front view; and

[0139] Fig. 21 the chuck device in a along the

[0140] Line BB of Fig. 18 cut side view.

[0141] Figure 1 shows a chuck device 1 according to the invention for clamping an object, for example, a drill. The chuck device 1 is equipped with a clamping ring arrangement 200 according to the invention with a clamping ring unit 23 and an additional clamping ring 4 and can be operated in a quick-adjustment mode 110 and in a rotary clamping mode 100. The chuck device 1 has a receiving end 101 for the object and a drive end 111, which faces a machine (not shown here).

[0142] With reference to Figures 1 to 8, a variant of the chuck device 1 is described below, which is particularly suitable for use on a mobile machine, for example, on a hand drill or a cordless screwdriver. The chuck device 1 comprises a clamping jaw device 2 with clamping jaws 12 and a support body unit 22, and a clamping sleeve device 3 with a clamping sleeve 13 and a clamping ring unit 23.

[0143] The support body unit 22 comprises a central receiving bore 220 for the object and guide bores 221, in each of which a clamping jaw 12 is guided, so that their longitudinal axes are at an angle to a rotational axis of the chuck device 1. The support body unit 22 also comprises a connecting unit 17, which can be connected to the machine in order to drive the chuck device 1 and the object. For example, a connecting thread 27 is provided, which can be connected to the machine directly or via a Morse taper.

[0144] The clamping jaws 12 are equipped with an external thread structure 32, which can be screwed to an internal thread structure 33 of the clamping ring unit 23 and also to an internal thread arrangement 14 of an additional clamping ring 4. The external thread structure 32 comprises external thread sections 320, each arranged on a clamping jaw 12, and recess sections 321, which are provided by empty spaces between the clamping jaws 12.

[0145] The internal thread structure 33 comprises internal thread sections 330 and thread-free decoupling sections 331. The internal thread arrangement 14 comprises internal thread regions 24 and decoupling regions 34. Due to the inclined position of the clamping jaws 12, the external thread structure 32 and, accordingly, the internal thread structure 33 of the clamping ring unit 23 are conical and also have an internal thread arrangement 14.

[0146] The ends of the clamping jaws 12 facing the drive end 111 are each guided radially in a synchronization guide 15 of a synchronization ring unit 5. A preloading unit 18 is arranged downstream of the synchronization ring unit 5 toward the drive end 111. The preloading unit 18 presses the clamping jaws 12 toward the receiving end 111 so that they can be pressed against the object received in the receiving bore 220.

[0147] When the object is to be clamped, the clamping sleeve 13 is rotated in a clamping direction 10 so that the clamping jaws 12 move from an open position to a clamped position. When the clamping sleeve 13 is rotated in the clamping direction 10, the clamping ring unit 23 and the additional clamping ring 4 (the "rings") are screwed onto the clamping jaws 12. This causes the clamping jaws 12 to move toward the receiving end 101, and the object is clamped. Since the clamping jaw device 2 is braked by the machine through its connection to the machine, the clamping jaws 12 do not rotate when the clamping sleeve 13 is rotated. To release the object, the clamping sleeve 13 can be rotated in a release direction 11.

[0148] The quick adjustment mode 110 is activated by rotating the clamping sleeve 13 in the release direction. This aligns the clamping ring unit 23 and the additional clamping ring 4 in a defined (first) angular position. In this angular position, neither the internal thread sections 330 nor the internal thread areas 24 engage with the external thread sections 320. This allows the clamping jaws 12 to move in the axial direction independently of the clamping ring unit 23 and the additional clamping ring 4.

[0149] In quick adjustment mode 110, the clamping jaws 12 are thus pressed against the object only by the force of the preloading device 18. For example, a drill bit can be easily pulled out of the chuck device 1. When a drill bit is to be inserted, it only needs to be pressed against the receiving end of the clamping jaws 12, and the clamping jaws 12 will retract into the open position. Once the drill bit has been pushed far enough into the receiving bore 220, it can simply be released, as it is secured by the force of the preloading unit 18.

[0150] To clamp the inserted object (and to deactivate the quick adjustment mode 110), the clamping sleeve 13 is rotated back in the clamping direction 10. The clamping sleeve 13 and the clamping ring unit 23 are positively coupled to each other in the direction of rotation via a coupling arrangement 23a. As a result, the clamping ring unit 23 rotates when the clamping sleeve 13 is rotated.

[0151] Initially, the clamping ring unit 23 moves relative to the additional clamping ring 4. If the clamping sleeve 13 is rotated further, it is positively coupled to the additional clamping ring 4 by means of a driver device 6. In the coupled state, the clamping ring unit 23 and the additional clamping ring 4 can only be rotated further together in the clamping direction 10. The rotary clamping mode 100 is activated. A clamping ring arrangement 200 in the rotary clamping mode 100 is particularly clearly visible in Figure 7.

[0152] In order to positively couple the clamping ring unit 23 to the additional clamping ring 4 in the clamping direction 10, the driver device 6 is equipped here with a plurality of (first) driver units 16. The driver units 16 each comprise, for example, a driver 36 arranged on the clamping ring unit 23 and a driver 46 arranged on the additional clamping ring 4. The clamping ring unit 23 is pressed against the additional clamping ring 4 by means of a pretensioning unit 8.

[0153] In order to ensure that the threads of the internal thread sections 330 of the clamping ring unit 23 engage in the next possible thread of the external thread sections 320 of the clamping jaw device 2 when switching from the quick adjustment mode 110 to the rotary clamping mode 100, so that the chuck device 1 clamps the drill (object) with as few revolutions of the clamping sleeve 13 as possible, the latter is pressed against the additional clamping ring 4 by the pretensioning unit 8. A special feature of the clamping ring arrangement 200 is that the clamping ring unit 23 and the additional clamping ring 4 can be coupled to one another in the rotary clamping mode such that the internal thread sections 330 are arranged offset in the circumferential direction relative to the internal thread regions 24. As a result, at least a part of the internal thread sections 330 and / or the internal thread regions 24 is always in engagement with the external thread sections 320 when rotation occurs in the clamping direction 10.This allows the clamping ring unit 200 to be screwed onto the clamping jaws 12 by rotating the clamping sleeve 13 through any number of turns, so that the clamping jaws 12 clamp the object particularly firmly and securely.

[0154] If a firmly clamped object is to be released again, the clamping sleeve 13 merely needs to be rotated in the release direction 11. In doing so, the clamping sleeve 13 takes the clamping ring unit 23 along in the release direction 11 by means of the coupling arrangement 23a. As a result, the clamping ring unit 23 moves relative to the additional clamping ring 4. The clamping ring unit 23 can rotate relative to the additional clamping ring 4 until the driver device 6 couples the clamping ring unit 23 and the additional clamping ring 4 together in a rotationally fixed manner with respect to the release direction 11.

[0155] To couple the rings 4, 23 in the release direction, the driver device 6 here comprises a plurality of (second) driver units 26. These couple the clamping ring unit 23 and the additional clamping ring 4 with one another in a form-fitting manner with respect to the release direction 11. For example, the driver units 26 use the drivers 36, 46 for this purpose. However, it is also possible for additional drivers to be available for the second driver unit 26. The second driver units 26 couple the rings 4, 23 to one another in a defined (second) rotational angle position.

[0156] When the clamping ring unit 23 and the additional clamping ring 4 are coupled to one another in the release direction 11, the decoupling sections 331 are each at the same rotational angle position as the decoupling regions 34. If the clamping sleeve 13 is then rotated further in the release direction 11, the rings 4, 23 continue to move together in the coupled state until neither the internal thread sections 330 nor the internal thread regions 24 are in engagement with the external thread sections 320. The quick adjustment mode 110 is then activated and the clamping jaws 12 can move in the axial direction independently of the clamping ring unit 23 and the additional clamping ring 4. The object is then fixed only by the preload force of the preload unit 18 and can be easily removed from the chuck device 1. In Figure 8, the clamping ring arrangement 200 in the quick adjustment mode 110 can be seen particularly well.

[0157] A different drill bit can be inserted just as easily by simply pressing it against the clamping jaws 12. These then automatically adjust to the diameter of the new drill bit. Once the drill bit is inserted, the clamping sleeve 13 can be rotated in the clamping direction 10 until the quick adjustment mode 110 is deactivated. If the clamping sleeve 13 is rotated further in the clamping direction 10, the rings 4, 23 are coupled together again and the rotary clamping mode 100 is active again. Clamping can then be carried out over many revolutions without the quick adjustment mode 110 being accidentally activated.

[0158] The orientation of the clamping ring arrangement 200 in the rotary clamping mode 100 can be clearly seen in Figure 5. The internal thread regions 24 of the additional clamping ring 4 are located in the rotation angle ranges where the decoupling sections 331 of the clamping ring unit 23 are arranged. Thus, internal threads 24, 330 are present (essentially) over the entire circumference, which can correspond to the external thread sections 320 of the clamping jaws 12. The clamping jaws 12 are therefore always in engagement with a thread 24, 330 (regardless of how far the clamping sleeve 13 is rotated in the clamping direction 10). In addition, the coupling arrangements 23a between the clamping sleeve and the clamping ring unit 23 can also be clearly seen here.

[0159] Figure 6 clearly shows the orientation of the clamping ring assembly 200 in the quick adjustment mode 110. The threadless decoupling sections 331 and the threadless decoupling regions 34 (located behind the clamping ring unit 23, not visible here) are arranged in the same rotation angle ranges as the externally threaded sections 320 of the clamping jaws 12. Thus, there is no threaded connection here, and the clamping jaws 12 can be pressed into the clamping position by the pretensioning unit 18.

[0160] Figures 7 and 8 show the clamping ring arrangements 200 of Figures 5 and 6 once again in analogous detailed representations, in which only the clamping ring unit 23 and the additional clamping ring 4 are shown.

[0161] Figure 8a shows an advantageous variant of the clamping ring arrangement 200 of Figures 7 and 8. The driver device 6 is provided here not only by the clamping ring unit 23 and the additional clamping ring 4, but also by the clamping sleeve 13. In other words, the rotationally fixed coupling of the clamping ring unit 23 with the additional clamping ring 4 is achieved here not only by corresponding structures on these components themselves, but also by the surrounding clamping sleeve 13. For better clarity, the clamping sleeve 13 is shown transparent here. The dashed lines indicate the structures of the clamping sleeve 13, which are part of the driver units 16, 26. At the same time, the structures here also provide the coupling arrangement 23a, via which the clamping sleeve 13 and the clamping ring unit 23 can be rotationally fixedly coupled to one another.

[0162] The clamping ring assembly 200 is shown here in rotary clamping mode 100. Drivers 36, 36a are formed on the clamping ring unit 23, and drivers 46, 46a are formed on the additional clamping ring 4. A driver 36b of the clamping sleeve 13 is located between the drivers 36, 36a. A driver 46b of the clamping sleeve 13 is located between the drivers 46, 46a, which driver can be displaced in the circumferential direction relative to the drivers 46, 46a.

[0163] When the clamping sleeve 13 is rotated in the release direction to activate the quick adjustment mode 110, its driver 36b engages the clamping ring unit 23. The driver 46b can initially move freely between the drivers 46, 46a of the additional clamping ring 4. This allows the clamping ring unit 23 to be rotated relative to the additional clamping ring 4 until the decoupling sections 331 are aligned with the decoupling areas 34. The quick adjustment mode 110 is then activated.

[0164] Figure 8b shows a variant of the chuck device 1 in which the additional clamping ring 4 and the clamping ring unit 23 are supported in the axial direction on a common shoulder 222. For this purpose, the additional clamping ring 4 has at least one support element 44. The clamping ring unit 23 also has at least one support element 23b, which in this case projects past the additional clamping ring 4. The support elements 23b, 44 are integrated into the driver device 6. This allows the threads of the additional clamping ring 4 and the clamping ring unit 23 to be manufactured independently of one another and with a more economical tolerance. By simply adjusting the axial length of the support elements 23b, 44 (e.g., by turning), the individual threads can then be brought into optimal alignment, resulting in a continuous thread when both support elements 23b, 44 rest against the shoulder 222.

[0165] Figure 8c shows a variant in which the clamping ring unit 23 is equipped with one or more chamfers 56. In an alternative variant, the chamfers 56 can also be arranged on the additional clamping ring 4. For example, the chamfers 56 are arranged on the corresponding driver units 16, 26. In the clamping sleeve 13 (not shown here), engagement contours 66 are formed, each of which interacts with a chamfer 56.

[0166] The chamfers 56 ensure a particularly clean engagement of the internal thread structure 33 in the external thread structure 32. As soon as a change is to be made from the quick adjustment mode 110 to the rotary clamping mode 100, the external thread structure 32 of the clamping jaws 12 must be precisely aligned with the internal thread structure 33 of the clamping ring unit 23 and the internal thread arrangement 14 of the additional clamping ring 4. Otherwise, the corresponding threads collide and the clamping ring unit 23 and the additional clamping ring 4 cannot be screwed onto the external thread structure 32. If a collision of the threads occurs, the clamping sleeve 13 can only be turned further with increased force or not at all. The chamfers 56 ensure that in the event of a thread collision, an axial force is exerted on the clamping ring unit 23 and the clamping ring unit 23 slides axially outwards (here left).This ensures that the internal thread structure 33 engages cleanly into the next possible thread of the external thread structure 32.

[0167] With reference to Figures 9 to 16, a variant of the chuck device 1 is described below, which can be used particularly advantageously on a stationary machine, for example, on a pillar drill or the like. The chuck device 1 has a chuck base body 7, which can be connected to a stationary machine (not shown in detail here) by means of a connecting unit 17 in order to be subjected to a torque by the latter. Coupling to the machine is achieved, for example, via a connecting thread 27.

[0168] The clamping sleeve device 3 comprises a clamping sleeve 13, which is rotatably mounted on the chuck base body 7 at a section 130a by means of a bearing device 47 and, for example, a roller bearing. 130a The clamping sleeve 13 is screwed onto an external thread of the coupling sleeve 130 by means of an internal thread. The coupling sleeve 130 is, in turn, screwed to the component 130a.

[0169] The clamping jaw device 2 comprises clamping jaws 12, a support body unit 22, and a coupling sleeve 130. The support body unit 22 here comprises a jaw guide unit 42, on which the clamping jaws 12 are guided in the radial direction. The coupling sleeve 130 has recesses through which the clamping jaws 12 extend toward the clamping sleeve 13. For clamping, the clamping sleeve 13 is rotated in the clamping direction 10, and for releasing, it is rotated in the release direction 11.

[0170] The inner contour of the clamping sleeve 13 and the outer contour of the clamping jaws 12 are designed such that the clamping sleeve 13 can press the clamping jaws 12 into the clamping position when the clamping jaws 12 and the clamping sleeve 13 are moved toward each other. The support body unit 22 and the clamping jaws 12 are preloaded in the axial direction against the clamping sleeve 13 by a preload unit 28.

[0171] The support body unit 22 here has an external thread structure 32 with external thread sections 320 and recess sections 321. By means of the external thread structure 32, the support body unit 22 can be screwed to a clamping ring unit 23 and an additional clamping ring 4. For this purpose, the clamping ring unit 23 has an internal thread structure 33 with internal thread sections 330 and decoupling sections 331. The additional clamping ring 4 has an internal thread arrangement 14 with internal thread regions 24 and decoupling regions 34.

[0172] The clamping ring unit 23 can be connected here in a rotationally fixed manner to the chuck base body 7 by means of a coupling device 57.

[0173] For example, drivers 57a, 57b are provided for this purpose, by means of which the clamping ring unit 23 and the chuck base body 7 can be positively coupled to one another in the direction of rotation. Thus, the coupling device 57 can transmit the torque provided by the machine from the chuck base body 7 to the clamping ring unit 23.

[0174] A handle 37 is arranged at the drive end 111 and is non-rotatably connected to the chuck base body 7. Thus, if necessary, the chuck device 1 can be rotated together with the machine's drive without releasing the clamped object. This can be advantageous, for example, when aligning the drill bit on a workpiece.

[0175] When the clamping sleeve 13 is rotated in the release direction 11, the clamping ring unit 23 moves relative to the additional clamping ring 4 until both are rotationally fixedly coupled to one another by means of one or more (second) driver units 26 of a driver device 6. For this purpose, the additional clamping ring 4 is accommodated, for example, in the coupling device 57 in such a way that it can be rotated within a specific rotation angle range relative to the clamping ring unit 23. When the clamping ring unit 23 and the additional clamping ring 4 are coupled in the release direction 11, they are in a (second) defined rotation angle position and can only be rotated further together in the release direction 11. The decoupling sections 331 are then each arranged in the same rotation angle position as the decoupling regions 34.

[0176] The rings 4, 23 coupled in the release direction 11 can then be positioned relative to the support body unit 22 by rotating the clamping sleeve 13 in the release direction 11 such that neither the internal thread sections 330 nor the internal thread regions 24 are in engagement with the external thread sections 320. The quick adjustment mode 110 is then activated. The support body unit 22 is then no longer in a threaded connection with the clamping ring unit 23 and the additional clamping ring 4 and can therefore be moved in the axial direction relative to the rings 4, 23 and the chuck base body 7. In the quick adjustment mode 110, the clamping jaws 12 are only pressed into the clamped position by the force of the pre-tensioning unit 28. This allows a drill to be easily pulled out. If a new drill is to be inserted, it only needs to be pressed against the clamping jaws 12 so that these move back and move into the open position.When the drill is inserted, it is fixed by the pre-tensioning unit 28.

[0177] After inserting an object in quick adjustment mode 110, clamping is achieved by turning the clamping sleeve 13 in the clamping direction 10. The coupling sleeve 130, together with the clamping jaws 12 and the support body unit 22, also moves in the clamping direction 10. This unscrews the external thread structure 32 from the clamping ring unit 23 and from the additional clamping ring 4. As a result of the unscrewing, the clamping jaws 12 move against the clamping sleeve 13, so that they are pressed into the clamped position. In order to move the clamping jaws 12 into the open position, the support body unit 22 is screwed into the rings 4, 23.

[0178] If the quick adjustment mode 110 is still active and the clamping sleeve 13 is rotated in the clamping direction 10, the clamping ring unit 23 initially moves relative to the additional clamping ring 4. For this purpose, the additional clamping ring 4 is accommodated in the coupling device 57 in such a way that it can be rotated within a specific angle of rotation range relative to the clamping ring unit 23. This relative movement continues until the clamping ring unit 23 and the additional clamping ring 4 are rotationally fixedly coupled to one another in the clamping direction 10 by means of the driver device 6. Then the rotational clamping mode 100 is activated and the rings 4, 23 can only be rotated together in the clamping direction.

[0179] The driver device 6 here has one or more (first) driver units 16. This couples the rings 4, 23 together in a (first) rotational angle position. When the rings 4, 23 are coupled together in this way, the support body unit 22 can be rotated further in the clamping direction 10 by rotating the clamping sleeve 13 through any number of revolutions. Co-rotation of the clamping ring unit 23 or the additional clamping ring 4 is prevented by the fact that the chuck base body 7 is connected to the machine and is fixed or braked by it.

[0180] When the object is to be released again, the clamping sleeve 13 is rotated in the release direction 11. This results in a relative movement of the clamping ring unit 23 and the additional clamping ring 4. This relative movement continues until the second driver units 26 positively couple the clamping ring unit 23 and the additional clamping ring 4. The rings 4, 23 are then coupled in the second rotational angle position and can only be rotated further together. By further rotating in the release direction 11, the rings 4, 23 can then be aligned such that neither the internal thread sections 330 nor the internal thread regions 24 are in engagement with the external thread sections 320, and the quick adjustment mode 110 is activated.

[0181] The carrier units 16, 26 here, for example, have carriers 36, 46. In the example shown here, the carriers 36, 46 are partially provided by the carriers 57a, 57b of the coupling device 57. Carriers 36, 46 formed separately from the carriers 57a, 57b are also possible.

[0182] When the object is clamped as intended and the chuck base body 7 is set in rotation by the machine, the torque is transmitted via the internal thread structure (and in particular also the internal thread arrangement) to the external thread structure 32. This causes the support body unit 22 to rotate and with it the clamping jaws 12 and the object. In the example shown here, the external thread structure 32 is equipped with a left-hand thread. This means that the threaded connections cannot come loose when the machine drives the chuck base body 7 clockwise. The orientation of the clamping ring arrangement 200 in the rotary clamping mode 100 can be clearly seen in Figure 13. The internal thread regions 24 of the additional clamping ring 4 (not visible here behind the clamping ring unit 23) are located in the rotation angle ranges where the decoupling sections 331 of the clamping ring unit 23 are arranged.Thus, internal threads 24, 330 are present (essentially) over the entire circumference, which can correspond to the external thread sections 320 of the support body unit 22. The support body unit 22 is therefore always engaged with a thread 24, 330 (regardless of how far the clamping sleeve 134 is rotated in the clamping direction 10). Furthermore, the coupling device 57 between the chuck base body 7 and the clamping ring unit 23 can also be clearly seen here.

[0183] Figure 14 clearly shows the orientation of the clamping ring arrangement 200 in the quick adjustment mode 110. The thread-free decoupling sections 331 and the thread-free decoupling regions 34 (located behind the clamping ring unit 23, not visible here) are arranged in the same rotation angle ranges as the externally threaded sections 320 of the support body unit 22. Thus, there is no effective threaded connection here, and the support body unit 22 can be pressed into the clamping position by the pretensioning unit 28, together with the clamping jaws 12 (not visible here).

[0184] Figures 15 and 16 show the clamping ring arrangements 200 of Figures 13 and 14 once again in analogous detailed representations, in which only the clamping ring unit 23 and the additional clamping ring 4 are shown.

[0185] With reference to Figures 17 to 21, a variant is described below which is particularly small-sized and saves installation space and can be used, for example, in very compact cordless devices. The clamping ring arrangement 200 comprises a clamping ring unit 23 and an additional clamping ring 4. The clamping ring unit 23 has an internal thread structure 33 with individual thread-free decoupling sections 331 and internal thread sections 330. Here, a displacement device 9 is provided which converts a rotational movement of the clamping ring unit 23 into a translational movement of the additional clamping ring 23 relative to the clamping ring unit 4. The displacement device 9 here comprises wedge devices 19, 29 with corresponding wedge units 39.

[0186] The internal thread sections 330 are located on the side of the inner diameter of the driver 36 and can be screwed onto the external thread sections 320 of the external thread structure 32. The additional clamping ring 4 comprises an internal thread arrangement 14, which has thread-free decoupling areas 34 and internal thread areas 24.

[0187] The decoupling regions 34 here, due to their structural design, simultaneously represent the drivers 46. The internal thread regions 24 can also be screwed onto the external thread sections 320 of the external thread structure 32. The drivers 36, together with the internal thread sections 330 located thereon, are designed in terms of their dimensions and shape such that they can engage axially along the longitudinal axis of the support body unit 22 into the drivers 46 and, at the same time, also into the decoupling regions 34. The clamping ring unit 23 and the additional clamping ring 4 can be moved relative to one another, so that the clamping ring arrangement 200 can be put into a quick adjustment mode 110 and a rotary clamping mode 100.

[0188] In quick adjustment mode 110 (see Figs. 20 and 21), the clamping ring unit 23 with its internal thread sections 330 is not engaged with the external thread sections 320 of the clamping jaws 12. For this purpose, the clamping ring unit 23 has been displaced into a position directed axially towards the receiving end 101, so that mutual thread engagement upon rotation is not possible. The internal thread regions 24 of the additional clamping ring 4 are also not engaged with the external thread sections 320 of the clamping jaws 12 in quick adjustment mode 110, since these are located in the regions of the recess sections 321 of the external thread structure 32. The driver 36 of the clamping ring unit 23 is in a position in which it continues to have an axial overlap with the driver 46 of the additional clamping ring 4, so that they remain coupled to one another in a rotationally fixed manner.

[0189] In this state, the object to be inserted, such as a drill, can be pressed against the ends of the clamping jaws 12 directed toward the receiving end 101. As soon as the exerted force exceeds the force of the preload unit 18, the clamping jaws 12 are displaced along the respective guide bore 221 toward the drive end 111. This opens up a space within the receiving bore 220 between the ends of the respective clamping jaws 12, so that the object to be inserted can be inserted into them. The preload unit 18 then immediately ensures that the clamping jaws 12 are loaded toward the receiving end 101 and thus, for example, preload the shaft of a drill accordingly.

[0190] The rotary clamping mode (see Figs. 18 and 19) is typically activated after inserting the object to be clamped and by rotating the clamping sleeve 13 in the clamping direction 10. This deactivates the quick adjustment mode 110. The clamping sleeve 13 and the additional clamping ring 4 are positively coupled in the direction of rotation via a coupling arrangement 23a. Thus, the additional clamping ring 4 also rotates in the clamping direction 10, which is also positively coupled in the direction of rotation via the driver 46 to the driver 36 of the clamping ring unit 23, causing the clamping ring unit 23 to rotate as well.

[0191] In the first step, the additional clamping ring 4 engages with its internal thread areas 24 into the external thread sections 320. The clamping ring unit 23 also rotates, but due to its axial position, it cannot engage with its internal thread sections 330 into the external thread sections 320 or move axially upwards in the direction of the drive end 111. After further rotation, the internal thread sections 330 of the clamping ring unit 23 reach the recess sections 321. Because the wedge-shaped driver 46 of the additional clamping ring 4 corresponds to the shape of the driver 36 of the clamping ring unit 23 and axially in the direction of the drive end 111 no clamping jaw 2 blocks the path in this direction, the clamping ring unit 23 is moved in the direction of the drive end 111.

[0192] The driver 36 of the clamping ring unit 23 thus slides deeper into the driver 46 of the additional clamping ring 4 until the end faces of both components reach each other and thus bear against one another. Upon further rotation, the internal thread sections 330 leave the recess sections 321 and engage in the external thread sections 320 of the clamping jaws 12. This is possible because the lead of the threads of the internal thread regions 24 are aligned with the internal thread sections 330, thus forming a continuous thread helix. Thus, the internal thread arrangement 14 of the additional clamping ring 4 and the internal thread structure 33 of the clamping ring unit 23 complement each other to form a full-circumferential thread, whereby the external thread structure 32 always has full thread engagement in the rotary clamping mode. This enables reliable and powerful clamping of a wide variety of objects over a wide range of diameters.

[0193] To release the inserted object again, the clamping sleeve 13 must be rotated in the release direction 11 so that the rotary clamping mode 100 is deactivated and the quick adjustment mode 110 can be reactivated. Due to the coupling arrangement 23a and the resulting positive coupling of the clamping sleeve 13 and the additional clamping ring 4, the additional clamping ring 4 is also rotated in the release direction. Due to the coupling of the additional clamping ring 4 by its driver 46 with the driver 36 of the clamping ring unit 23, the clamping ring unit 23 also rotates in the release direction 11.

[0194] Both the internal thread areas 24 and the internal thread sections 330 are unscrewed from the external thread sections 320 of the external thread structure 32 upon the first partial rotation. This continues until the internal thread sections 330 come out of engagement with the external thread sections 320 of the clamping jaws 12 for the first time and are thus at the level of the unthreaded recess sections 321. In this position, the clamping ring unit 23 can thus be moved axially in the direction of the receiving end 101, so that it can assume the axial position in which the internal thread sections 330 can no longer enter into threaded engagement with the external thread sections 320 upon further rotation.

[0195] This occurs here by a further partial rotation of the clamping sleeve 13 and thus also of the additional clamping ring 4 and the clamping ring unit 23, since the wedge-shaped design of the driver 46 corresponds to the wedge-shaped driver 36 and therefore an axial force results which moves the clamping ring unit 23 in the direction of the receiving end 101. The freedom of movement of the clamping ring unit 23 is limited axially in the direction of the receiving end 101 by, for example, a retaining ring (not shown), so that the driver 36 of the clamping ring unit 23 never comes out of the coupling from the driver 46 and the decoupling area 34 in the axial direction. At this time, the internal thread areas 24 are still in engagement with the external thread sections 320.

[0196] By further partial rotation, the internal thread sections 330 leave the recess sections 321 and once again reach the area of ​​the external thread sections 320, but do not engage therein due to their axial position. Parallel to this, the internal thread sections 24 come out of engagement with the external thread sections 320 and reach the unthreaded recess sections 321. Since neither the internal thread sections 24 nor the internal thread sections 330 engage in the external thread sections 320, the clamping jaws 12 can once again be moved freely in the guide bores 221, depending on the force of the pretensioning unit 18. The quick adjustment mode 110 is thus activated and the rotary clamping mode 100 is deactivated. The inserted object, such as e.g. In this state, a drill can be pulled out of the clamping jaws 12 and the receiving bore 220 in the direction of the receiving end 111 with little force.

[0197] In the variant shown here, a circumferential and continuous conical internal thread is created by switching to the rotary clamping mode 100, in which the threadless decoupling areas 34 of the additional clamping ring 4 are supplemented in the circumference by the internal thread sections 330 of the clamping ring unit 23. In the variants presented previously, the decoupling areas 34 of the additional clamping ring 4 are supplemented by the internal thread sections 330 of the clamping ring unit 23 in a position axially underneath. This requires a correspondingly large amount of installation space in the axial direction, which can sometimes be disadvantageous. Furthermore, the external thread sections 320 of the clamping jaws 12 must protrude from the support body unit 22 to a greater extent, which has a negative effect on the guidance of the clamping jaws 12 within the guide bores 221.

[0198] List of reference symbols:

[0199] 1 chuck device 36 drivers

[0200] 2 clamping jaw device 36a driver

[0201] 3 Clamping sleeve device 36b Driver

[0202] 4 Additional clamping ring 37 Grip piece

[0203] 5 Synchronization ring 39 Wedge area unit 42 Jaw guide unit

[0204] 6 Driving device 44 Support element

[0205] 7 Chuck base body 46 Driver

[0206] 8 Preload unit 46a Driver

[0207] 9 Shifting device 46b Driver

[0208] 10 Clamping direction 47 Bearing device

[0209] 11 Release direction 56 Chamfer

[0210] 12 clamping jaw 57 coupling device

[0211] 13 Clamping sleeve 57a driver

[0212] 14 Internal thread arrangement 57b Driver

[0213] 15 Synchronization guide 66 Intervention contour

[0214] 16 Driving unit 100 Rotary clamping mode

[0215] 17 Connection unit 101 Recording end

[0216] 18 Preload unit 110 Quick adjustment mode

[0217] 19 Wedge device 111 Drive end

[0218] 22 Support body unit 130 Coupling sleeve

[0219] 23 Clamping ring unit 130a section

[0220] 23a Coupling arrangement 200 clamping ring arrangement

[0221] 23b Support element 220 mounting hole

[0222] 24 Internal thread area 221 Guide hole

[0223] 26 Driver unit 222 Shoulder

[0224] 27 Connection thread 320 external thread section

[0225] 28 Pre-tensioning unit 321 from recess section

[0226] 29 Wedge device 330 Internal thread section

[0227] 32 External thread structure 331 Decoupling section

[0228] 33 internal thread structure

[0229] 34 Decoupling area

Claims

Claims:

1. Chuck device (1) for clamping an object, in particular a drill, comprising a clamping jaw device (2) with clamping jaws (12) that can be clamped against the object and with a support body unit (22) for the clamping jaws (12) and comprising a clamping sleeve device (3) with a clamping sleeve (13) and with a clamping ring unit (23) that can be rotated relative to the clamping jaw device (2) in a clamping direction (10) and a release direction (11), wherein the clamping ring unit (23) has an internal thread structure (33) with internal thread sections (330) and with decoupling sections (331) arranged in the circumferential direction between the internal thread sections (330), and wherein the clamping jaw device (2) has an external thread structure (32) that can be screwed to the internal thread structure (33) and external thread sections (320) and with recess sections (321) arranged in the circumferential direction between the external thread sections (320), wherein the internal thread sections (330) correspond to the recess sections (321) and the external thread sections (320) correspond to the decoupling sections (331), so that the clamping ring unit (23) can be positioned by rotation such that the internal thread sections (330) are no longer in engagement with the external thread sections (320), characterized by at least one additional clamping ring (4) arranged rotatably relative to the clamping jaw device (2) and having an internal thread arrangement (14) which can be screwed to the external thread structure (32) and has internal thread regions (24) and with decoupling regions (34) arranged in the circumferential direction between the internal thread regions (24).

2. Chuck device (1) according to the preceding claim, wherein by moving the clamping ring unit (23) relative to the additional clamping ring (4), the clamping ring unit (23) and the Additional clamping ring (4) can be coupled to one another and that in the coupled state, upon further rotation in the clamping direction (10), at least some of the internal thread sections (330) and / or the internal thread regions (24) are always in engagement with the external thread sections (320).

3. Chuck device (1) according to one of the preceding claims, wherein the internal thread sections (330) can be arranged offset in the circumferential direction to the internal thread regions (24), so that the internal thread sections (330) in combination with the internal thread regions (24) enclose the circumference of the external thread structure (32) to at least 270° and preferably to at least 330° and particularly preferably substantially completely.

4. Chuck device (1) according to one of the preceding claims, wherein the internal thread sections (330) are displaceable in the axial direction relative to the internal thread regions (24).

5. Chuck device (1) according to one of the preceding claims, wherein the internal thread areas (24) with the recess sections (321) and the external thread sections (320) correspond to the decoupling areas (34) so ​​that the additional clamping ring (4) can be positioned such that the internal thread areas (24) are no longer in engagement with the external thread sections (320).

6. Chuck device (1) according to one of the preceding claims, wherein by rotating the clamping ring unit (23) in the release direction (11), the clamping ring unit (23) and the additional clamping ring (4) can be coupled to one another in a rotationally fixed manner, so that they can only be rotated further together in the release direction (11), and wherein the clamping ring unit (23) and the additional clamping ring (4) are aligned with one another in such a way that the decoupling sections (331) with the decoupling areas (34).

7. Chuck device (1) according to one of the preceding claims, wherein the clamping ring unit (23) and the additional clamping ring (4) can be positioned by rotating them together in the release direction (11) such that neither the internal thread sections (330) nor the internal thread regions (24) are in engagement with the external thread sections (320).

8. Chuck device (1) according to one of the preceding claims, wherein a quick adjustment mode (110) can be activated by positioning the clamping ring unit (23) and additional clamping ring (4) in which neither the internal thread sections (330) nor the internal thread regions (24) are in engagement with the external thread sections (320).

9. Chuck device (1) according to the preceding claim, wherein the clamping jaws (12) can be clamped against the object in the quick adjustment mode (110) by displacing the clamping jaws (12) in the axial direction relative to the clamping ring unit (23) and the additional clamping ring (4).

10. Chuck device (1) according to one of the preceding claims, wherein, when the clamping ring unit (23) and the additional clamping ring (4) are coupled to one another in a rotationally fixed manner by rotation in the clamping direction (10), a rotational clamping mode (100) is activated and wherein the clamping jaws (12) can be clamped against the object in the rotational clamping mode (100) by rotating the clamping ring unit (23) and the additional clamping ring (4) relative to the clamping jaw device (2) in the clamping direction (10).

11. Chuck device (1) according to the preceding claim, wherein the rotary clamping mode (100) remains active at least as long as the clamping ring unit (23) and the additional clamping ring (4) are rotated together in the clamping direction (10).

12. Chuck device (1) according to one of the two preceding claims, wherein the rotary clamping mode can be deactivated by rotating the clamping ring unit (23) and the additional clamping ring (4) in the release direction (11) until neither the internal thread sections (330) nor the internal thread regions (24) are in engagement with the external thread sections (320) and in particular the quick adjustment mode (110) is activated.

13. Chuck device (1) according to one of the preceding claims, wherein the number of external thread sections (320) is equal to the number of decoupling sections (331) and equal to the number of decoupling regions (34) and / or wherein the number of recess sections (321) is equal to the number of internal thread sections (330) and equal to the number of internal thread regions (24).

14. Chuck device (1) according to one of the preceding claims, wherein the clamping ring unit (23) and the additional clamping ring (4) are arranged axially one behind the other at least in sections.

15. Chuck device (1) according to one of the preceding claims, wherein the external thread sections (320) are arranged on the clamping jaws (12) and wherein the recess sections (321) are provided by empty spaces between the clamping jaws (12) or wherein the external thread structure (32) is arranged on the support body unit (22).

16. Chuck device (1) according to one of the preceding claims, wherein by rotating the clamping sleeve (13) in the clamping direction (10) the clamping ring unit (23) and the additional clamping ring (4) are screwed onto the clamping jaws (12) and wherein the clamping jaws (12) are thereby clamped against the Object is movable.

17. Chuck device (1) according to one of the preceding claims, comprising a synchronization ring unit (5) with radially extending synchronization guides (15), wherein the clamping jaws (12) are each guided in a synchronization guide (15) in the radial direction, so that when clamped against the object they can only move together to the same extent relative to one another.

18. Chuck device (1) according to one of the preceding claims, wherein by rotating the clamping sleeve (13) in the clamping direction (10) the clamping jaw device (2) can be set into a rotary movement and wherein by the rotary movement the support body unit (22) is unscrewed from the clamping ring unit (23) and the additional clamping ring (4) and wherein by the unscrewing the clamping jaws (12) are acted upon against the clamping sleeve (13) and thereby move against the object.

19. Chuck device (1) according to one of the preceding claims, comprising at least one displacement device (9) which is suitable and designed to convert a rotational movement of the additional clamping ring (4) and / or the clamping ring unit (23) into a translational movement of the additional clamping ring (23) relative to the clamping ring unit (4).

20. Clamping ring arrangement (200) for a chuck device (1) according to one of the preceding claims, comprising a clamping ring unit (23) and an additional clamping ring (4).

21. Method for operating a chuck device (1) according to one of claims 1 to 15.

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