Connection device for a machine tool and machine tool system having a connection device

Abstract

The invention relates to a connection device having a first connection part, which is configured as part of a basic unit or as part of an extension or an adapter of a machine tool, a second connection part, which is configured as part of an extension or an adapter or as part of a tool accessory for a machine tool, a securing unit, which is provided for securing the second connection part on the first connection part by a movement along a straight connection direction, and a coupling unit, which in a coupled state is provided for transmitting a drive force from the first connection part to the second connection part parallel to the connection direction. It is proposed that the securing unit is provided for automatically securing the first connection part and the second connection part to each other when or after the first connection part and the second connection part are pushed into each other along the connection direction, wherein the coupling unit is provided for automatically transitioning into the coupled state when or after the first connection part and the second connection part are pushed into each other along the connection direction.

Description

Technical Field

[0001] The present invention relates to a connection device for a machine tool and a machine tool system having the connection device. Background Technology

[0002] A connection device for a machine tool and / or for a machine tool system has been proposed, comprising at least one first connector, at least one second connector, at least one fixing unit, and at least one coupling unit, wherein the fixing unit is configured to fix the second connector to the first connector by movement along at least substantially straight connection direction, and the coupling unit is configured, at least in a coupled state, to transmit a driving force at least substantially parallel to the connection direction from the first connector to the second connector. Summary of the Invention

[0003] The present invention relates to a connection device for machine tools and / or machine tool systems, particularly for stabgebundene connections, comprising: at least one first connector, which is particularly configured as part of a basic unit of the machine tool or as part of an extension or adapter; at least one second connector, which is particularly configured as part of an extension or adapter or as part of a tool accessory for the machine tool; at least one fixing unit configured to fix the second connector to the first connector by movement along at least a substantially straight connection direction; and at least one coupling unit configured, at least in a coupled state, to transmit driving force, at least substantially parallel to the connection direction, from the first connector, particularly a coupling element of the coupling unit configured as part of the first connector, to the second connector, particularly a coupling element of the coupling unit configured as part of the second connector.

[0004] The present invention proposes that a fixing unit is configured to at least substantially automatically fix the first connector and the second connector to each other when or after they are pushed into each other along the connection direction, wherein the connecting unit is configured to at least substantially automatically transition to a coupling state when or after the first connector and the second connector are pushed into each other along the connection direction. "Substantially automatically" "It should be understood in particular that the structural units, especially the fixing units and / or coupling units, implement and / or occupy a specific action and / or a defined state, especially a fixed state and / or a transition to a coupling state, through specific manipulation or action, particularly when the first and second connectors are pushed into each other along the connection direction, or afterward, without any other action or action by the user. In particular, no other external force is required to implement / occupy the action / state. Preferably, the fixing unit is configured to fix the first and second connectors to each other solely by the movement of the two connectors relative to each other and / or by the force, especially that of the user, used to push them into each other, when or after the first and second connectors are pushed into each other along the connection direction. Preferably, the coupling unit is configured to..." This is for use when the first and second connectors are pushed into each other along the connection direction, solely by the movement of the two connectors relative to each other and / or by a force, particularly from the user, used to push them into each other. Preferably, the coupling unit is configured to transition to a coupled state, especially independently of the fixing of the two connectors, after the two connectors are pushed into each other (especially if a transition from the coupling unit to the coupled state does not occur when the connectors are pushed into each other). In particular, the coupling unit is configured to transition to a coupled state at least substantially automatically, especially in applications involving driving forces in machine tools and / or machine tool systems, after the two connectors are pushed into each other.

[0005] The connection direction, at least substantially straight, is preferably completely and substantially parallel to the axis, especially the central axis, of the connecting device, particularly the first and second connecting members. "Substantially parallel" should be understood in particular as the orientation of a straight line, plane, or direction (especially the connection direction) relative to another straight line, plane, or reference direction (especially the aforementioned axis), wherein the straight line, plane, or direction has a deviation of particularly less than 8°, advantageously less than 5°, and particularly advantageously less than 2° relative to the other straight line, plane, or reference direction (especially when viewed in a projection plane). Preferably, the coupling unit comprises at least one, especially the aforementioned coupling element, and at least one, especially the aforementioned additional coupling element. Preferably, the coupling element is configured to directly transmit driving force to the additional coupling element in the coupled state of the coupling unit. Preferably, the coupling unit, especially the coupling element, and the additional coupling element are configured to transmit driving force by mechanical force transmission, especially by form-locking.

[0006] Preferably, the first and second connectors are respectively arranged on at least one component of the machine tool and / or machine tool system and are preferably constructed as part of the respective component. In particular, the connecting devices are configured for fixing these components to each other and connecting them to each other for transmitting driving force. Preferably, the first connector includes at least one base and at least one coupling element, which is arranged, in particular, on the base. Preferably, the coupling element is guided, at least substantially parallel to the connection direction, on or within the base of the first connector. Preferably, the coupling element is arranged, at least substantially, inside the base of the first connector. Preferably, the second connector includes at least one base and at least one additional coupling element, which is arranged, in particular, on the base. Preferably, the additional coupling element is guided, at least substantially parallel to the connection direction, on or within the base of the second connector. Preferably, the additional coupling element is arranged, at least substantially, inside the base of the second connector. Preferably, the fixing unit includes at least one fixing element, which is arranged, at least partially, on the base of the first or second connector. Preferably, the fixing unit includes at least one mating fixing element configured to cooperate with the fixing element for fixing the first connector and the second connector to each other. In particular, the mating fixing element is arranged on the second connector, while the fixing element is arranged on the first connector. Alternatively, the mating fixing element is arranged on the first connector, while the fixing element is arranged on the second connector.

[0007] Preferably, the connecting device, especially the fixing unit, includes at least one guide unit configured to guide the first and second connectors when pushed into each other. Preferably, the guide unit is configured to pre-determine the relative orientation of the first and second connectors, particularly about an axis at least substantially parallel to the connection direction, for pushing the first and second connectors into each other. The guide unit includes at least one guide element, configured, for example, as a protrusion, track, or the like, and arranged on the first or second connector. Preferably, the guide unit includes at least one receiving portion, preferably defined by the first or second connector. Preferably, at least one receiving portion of the guide unit is configured to receive the guide element when the first and second connectors are pushed into each other and preferably guides the guide element along the longitudinal extension of the receiving portion of the guide unit. Particularly preferably, the guide unit is configured such that the connecting device has exactly one possible relative orientation of the first and second connectors for pushing the first and second connectors into each other, particularly about an axis at least substantially parallel to the connection direction. It is conceivable that at least one guiding element and / or the receiving portion of the guiding unit is constructed integrally with the base of the first or second connector. Advantageously, "integral" should also be understood as "one-piece." "One-piece" should especially be understood as being molded as a single unit. Preferably, this unit is manufactured from a single blank, billet, and / or casting, particularly preferably by injection molding, especially single-component and / or multi-component injection molding. It is also conceivable that the connecting device, especially the fixing unit, includes multiple guiding elements and / or receiving portions. Preferably, the number of receiving portions of the guiding unit corresponds at least to the number of guiding elements. It is also conceivable that, preferably, the connecting device, especially the fixing unit, has more receiving portions of guiding units than the number of guiding elements, if the guiding unit can achieve multiple possible orientations of the first and second connectors relative to each other for pushing into each other.

[0008] The configuration of the connecting device according to the invention enables an advantageous, intuitive, and rapid connection of two components, particularly for a stable connection and simultaneous transmission of driving force between the components. This achieves a high degree of user-friendliness. In particular, it advantageously prevents undesirable damage and / or incorrect connections caused by user errors during the connection of the components. This advantageously enables simple and cost-effective manufacturing and maintenance, especially because it eliminates the need for additional operating and / or driving elements.

[0009] Furthermore, it is proposed that the fixing unit includes at least one, particularly the aforementioned fixing element, configured to at least substantially automatically fix the first and second connectors when pushed into each other. The coupling unit includes at least two coupling elements, particularly the aforementioned coupling element and the aforementioned additional coupling element, which engage with each other in the coupled state of the coupling unit. The fixing element is configured to manipulate one of the two coupling elements, particularly at least tilted in the connection direction, when the first and second connectors are pushed into each other. This allows for advantageously intuitive fixing and coupling, especially where manipulation of the actuating and / or fixing elements is not required beyond pushing them into each other. Preferably, the fixing element is constructed and / or arranged such that it engages at least substantially automatically and / or is arranged on the mating fixing element when the first and second connectors are pushed into each other. Preferably, the fixing element is constructed as a locking element, such as a locking protrusion, groove, or the like. In particular, the fixing element has at least one guide surface, which is tilted in the connection direction and tilted in a plane perpendicular to the connection direction in the basic state of the fixing element. Preferably, the fixing element can be elastically tilted in the connection direction. For example, the fixing element is arranged by a swing arm, particularly fastened to the base of the first or second connector. It is conceivable that the fixing element is constructed as a single piece with the swing arm and / or base of the first or second connector. Preferably, the mating fixing element is constructed as a recess defined by the first connector, particularly its base, or by the second connector, particularly its base. Preferably, the fixing element is configured to act in conjunction with the first connector, particularly its base, or with the second connector, particularly its base, particularly when the first and second connectors are pushed into each other, particularly via a guide surface, wherein the fixing element is at least partially, preferably elastically movable by the swing arm in a direction transverse to the connection direction. Preferably, the fixing element is configured to slide along the base of the first connector, particularly its base, or the second connector, particularly its base, via the guide surface when the first and second connectors are pushed into each other, preferably until the fixing element reaches the mating fixing element in the connection direction. Preferably, the fixing element is configured to engage at least substantially automatically with the mating fixing element, especially when or after the first and second connectors are fully pushed into each other, in order to secure the first and second connectors to each other by a restoring force, particularly caused by the swing arm. Preferably, the fixing element is configured to apply a force oblique to the connection direction to the coupling element or another coupling element by movement in a direction transverse to the connection direction when the first and second connectors are pushed into each other, wherein, in particular, the coupling element or another coupling element is manipulated.Preferably, the fixing element and / or the swing arm are constructed and / or arranged such that when the first connector and the second connector are pushed into each other, the fixing element moves about the swing axis of the fixing element by at least 5°, preferably at least 10° and preferably at least 15° and / or at most 45°, preferably at most 30° and preferably at most 20°, said swing axis being oriented particularly perpendicular to the connection direction. Preferably, the swing axis of the fixing element has a minimum distance of at least 3 cm, preferably at least 4 cm and preferably at least 5.5 cm relative to the fixing element, particularly along the swing arm.

[0010] Furthermore, it is proposed that the coupling unit includes at least one, particularly the aforementioned coupling element, and at least one additional coupling element, particularly the aforementioned additional coupling element, wherein the coupling element and / or the additional coupling element constitutes at least one guide surface, which is inclined to the connection direction and configured to allow the additional coupling element or coupling element to be at least substantially automatically converted into a coupled state when the two coupling elements move toward each other at least substantially parallel to the connection direction, particularly by means of the mutual oscillation of the coupling elements about axes oriented at least substantially perpendicular to the connection direction. "Substantially perpendicular" should be understood in particular as the orientation of a straight line, a plane, or a direction, particularly the aforementioned axis, relative to another straight line, another plane, or a reference direction, particularly the connection direction, wherein the straight line, the plane, or the direction and the other straight line, the other plane, or the reference direction, particularly when viewed in the projection plane, form an angle of 90°, and this angle has a maximum deviation particularly less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. This advantageously enables automatic and rapid coupling. Preferably, the coupling state of the coupling unit can also be achieved, particularly independently of the positions of the coupling elements when the connectors are fixed together, through the opposing movement of the coupling elements, especially through the driven movement of the coupling elements, after the connectors are fixed together. Preferably, the coupling element and the other coupling element each have at least one guide surface. Preferably, the at least one guide surface is inclined to the connection direction orientation and / or inclined to a plane or axis perpendicular to the connection direction orientation. Preferably, the at least one guide surface is at least partially circular. Preferably, at least one guide surface arranged on the coupling element is at least partially planar. Preferably, the normal vector of the guide surface arranged on the coupling element is spread with the axis at least substantially parallel to the connection direction orientation at a guide angle of at least 5°, preferably at least 10° and preferably at least 15° and / or at most 60°, preferably at most 45° and preferably at most 35°. In particular, the guide surface is configured to at least substantially automatically transition the coupling unit into the coupling state when the coupling element and the other coupling element move towards each other parallel to the connection direction, especially also independently of the manipulation by the fixing element. Preferably, one or more guide surfaces are configured to tilt, in particular laterally to, the coupling element relative to each other relative to the connection direction when the coupling element and another coupling element move towards each other parallel to the connection direction, wherein, in particular, the coupling element and the other coupling element apply forces to each other via the guide surfaces. Alternatively, it can be considered that only one coupling element of the coupling unit, in particular the coupling element or another coupling element, can move laterally to the connection direction, wherein, when the coupling element and the other coupling element move towards each other parallel to the connection direction, the corresponding other coupling element moves laterally to the connection direction along the coupling element via the guide surfaces.

[0011] Furthermore, it is proposed that the coupling unit includes at least one, particularly the aforementioned coupling element, and at least one additional coupling element, particularly the aforementioned additional coupling element, which are each individually constructed as sheet metal parts and configured to engage with each other at least in a form-locking manner for transmitting driving force in the coupled state. This allows for an advantageously simple configuration of the coupling elements. It enables advantageously low manufacturing costs for the connecting device, particularly the coupling elements. Preferably, the coupling element and / or the additional coupling element are formed by stamping and / or bending sheet metal. Preferably, the coupling element and / or the additional coupling element are each constructed as a single piece. Preferably, the coupling element and the additional coupling element are configured to move relative to each other, particularly by means of guide surfaces(s), inclined, particularly transverse to the connection direction, when moving towards each other parallel to the connection direction, wherein the coupling element and the additional coupling element are engaged with each other in a form-locking manner.

[0012] Furthermore, it is proposed that the coupling unit includes at least one coupling element, which is elastically constructed, at least in the coupling region of the coupling unit, against at least one motion spring transverse to the connection direction, wherein the unloaded state of the at least one coupling element corresponds to the basic position of the coupling element in the coupling state. This allows for an advantageously flexible arrangement of one or more coupling elements. Undesirable damage to the connectors can be advantageously prevented when the connectors are pushed into each other. Damage to the coupling elements and / or material fatigue can be advantageously prevented, especially because the coupling elements can be advantageously arranged unloaded in the connection state. Preferably, the coupling region of the coupling unit includes a region of the coupling element and other coupling elements that move in the coupling state to transmit driving force. Preferably, the coupling region of the coupling unit extends from the maximum deflection of the coupling element for transmitting driving force parallel to the connection direction to the minimum deflection of the coupling element for transmitting driving force parallel to the connection direction. Preferably, the first connector and / or the second connector includes at least one support element configured to hold one or more coupling elements against movement transverse to the connection direction. Preferably, the support elements are respectively arranged inside the base of the first connector or the base of the second connector. For example, the support element is constructed as a reduction in the base of the first connector or the base of the second connector, wherein the coupling element or another coupling element extends through the reduction. Preferably, the coupling element or another coupling element is capable of moving parallel to the connection direction, especially at least substantially without resistance, relative to the reduction. In a preferred configuration, the first connector and the second connector each include at least one support element, especially constructed as a reduction, which is used to hold the coupling element or another coupling element. Preferably, the coupling element and / or the other coupling element is held by the support element such that the end region of one of the coupling element and / or the other coupling element, especially facing the coupling region, is capable of elastically swinging laterally to the connection direction. In particular, the coupling element and the other coupling element each have at least one swing axis, which is arranged along the connection direction in the region of the support element. Especially in configurations where the coupling element and / or other coupling elements are constructed as sheet metal components, the swing axes are oriented at least substantially parallel to the main extension plane of the coupling element or other coupling element. The "main extension plane" of the structural unit, especially the coupling element and / or other coupling element, should be understood as a plane parallel to the largest side face of the smallest imaginary cuboid that just completely surrounds the structural unit and extends through the midpoint of that cuboid. Preferably, the swing axes of the coupling element or other coupling element are at least substantially perpendicular to the connection direction and perpendicular to the smallest lateral extension of the coupling element or other coupling element, which in particular extends at least substantially perpendicular to the connection direction.

[0013] Furthermore, it is proposed that the coupling unit includes at least one, particularly the aforementioned coupling element, and at least one additional coupling element, particularly the aforementioned additional coupling element, each having at least one form-locking protrusion and at least one form-locking recess, wherein these coupling elements are configured to form-lock engage with each other in a coupled state of the coupling unit. This advantageously enables the direct transmission of driving force between these coupling elements. This can achieve an advantageously high service life of the coupling elements, especially because it can advantageously prevent rapid wear of the coupling elements, such as in a connection with primary force locking. Preferably, the form-locking protrusion of the coupling element is configured to form-lock engage with and / or act on the form-locking recess of the additional coupling element in a coupled state. In particular, the form-locking protrusion of the coupling element is configured to transmit driving force from one coupling element to another in a direction at least substantially parallel to the connection direction and oriented from the other coupling element toward the coupling element, especially for pulling the coupling element. Preferably, the shape-locking protrusions of the coupling element and the shape-locking protrusions of other coupling elements are abutted against each other in a direction at least substantially parallel to the connection direction and oriented from the other coupling element toward the coupling element, especially for pulling the coupling element, in order to transmit the driving force. Preferably, they are abutted against each other through the force-transmitting surfaces of the coupling element and the other coupling element. Preferably, the shape-locking protrusions of the other coupling elements are configured to form-lock into and / or act on the shape-locking recesses of the coupling element in a form-locking state. Preferably, the shape-locking protrusions of the coupling elements at least partially define the shape-locking recesses of the coupling elements, wherein preferably at least one inner surface of the coupling element forms a side surface of the shape-locking protrusion of the coupling element, which defines the shape-locking recess of the coupling element, and this side surface is preferably configured as a force-transmitting surface of the coupling element. Preferably, the shape-locking protrusion of the additional coupling element at least partially defines the shape-locking recess of the additional coupling element, wherein, preferably, at least one inner surface of the additional coupling element forms a side surface of the shape-locking protrusion of the additional coupling element, the inner surface defining the shape-locking recess of the additional coupling element, the side surface preferably being configured as a force-transmitting surface of the additional coupling element. Preferably, the coupling element and the additional coupling element are particularly configured such that the inner surfaces of the force-transmitting surfaces of the coupling element and the additional coupling element are configured to be surface-to-surface abutting each other in the coupled state, particularly in a direction at least substantially parallel to the connection direction and oriented from the additional coupling element to the coupling element. Preferably, the coupling element and / or the additional coupling element are particularly configured such that the inner surfaces of the(plural) force-transmitting surfaces of the coupling element and / or the additional coupling element are at least substantially planar.Preferably, the shape-locking protrusion of the coupling element has at least one inclined, particularly rounded, outer surface on the side opposite to the shape-locking recess of the coupling element, which is preferably configured as a guide surface of the coupling element. In particular, the outer surface of the shape-locking protrusion of the coupling element is inclined to the connection direction and inclined to a plane oriented perpendicular to the connection direction. Preferably, the shape-locking protrusion of another coupling element has at least one inclined, particularly rounded, outer surface on the side opposite to the shape-locking recess of another coupling element, which is preferably configured as a guide surface of another coupling element. In particular, the outer surface of the shape-locking protrusion of the other coupling element is inclined to the connection direction and inclined to a plane oriented perpendicular to the connection direction. Preferably, one or more shape-locking protrusions of the coupling element and / or another coupling element are respectively formed by bending and / or extruding the material of the coupling element or the other coupling element configured as a sheet metal component. Preferably, one or more shape-locking recesses of the coupling element and / or other coupling elements are formed by punching, cutting and / or pressing out the material of the coupling element or other coupling elements configured as sheet metal components.

[0014] Furthermore, it is proposed that the coupling unit includes at least one, particularly the aforementioned coupling element, and at least one additional coupling element, particularly the aforementioned additional coupling element, wherein the coupling element constitutes at least one, particularly the aforementioned shape-locking protrusion and at least one pushing protrusion, wherein the shape-locking protrusion is configured to transmit driving force to the additional coupling element along a pulling direction oriented at least substantially parallel to the connection direction, and wherein the pushing protrusion is configured to transmit driving force to the additional coupling element along a pushing direction oriented at least substantially parallel to the connection direction and pointing opposite to the pulling direction. This allows for the advantageous, fully shape-locking transmission of driving force from one coupling element to another, particularly along two directions oriented at least substantially parallel to the connection direction. Preferably, the pushing protrusion at least partially, particularly on one side of the shape-locking recess of the coupling element, by the shape-locking protrusion and / or the force transmission surface of the coupling element, limits the shape-locking recess of the coupling element. In particular, the pushing protrusion has a maximum lateral extension, at least substantially perpendicular to the connection direction and / or the main extension axis of the coupling element, which corresponds at least substantially to the maximum lateral extension of the shape-locking recess of the coupling element on the side of the shape-locking recess defined by the pushing protrusion. The "main extension axis" of the object, especially the coupling element, should be understood in particular as an axis that extends parallel to the longest edge of the smallest geometric cuboid that just completely surrounds the object, and preferably extends through the midpoint of the cuboid. Preferably, the pushing protrusion is bent from the material of the coupling element, which is configured as a sheet metal component, preferably in a direction perpendicular to the orientation of the main extension plane of the coupling element, corresponding to the extension direction of the shape-locking protrusion of the coupling element, which is preferably formed by bending and / or extruding the material of the coupling element in this extension direction. Preferably, the shape-locking protrusion, shape-locking recess, and / or pushing protrusion of the coupling element are arranged in the end region of the coupling element, which preferably forms a tab by the shape-locking recess. Preferably, the end region of the coupling element along the main extension axis of the coupling element includes the end of the coupling element. Preferably, viewed from the end of the coupling element, the pushing protrusion is arranged behind the shape-locking recess of the coupling element along the main extension axis of the coupling element. In particular, viewed from the end of the coupling element, the shape-locking protrusion of the coupling element is arranged in front of the shape-locking recess along the main extension axis of the coupling element, wherein, in particular, the force transmission surface of the limiting shape-locking protrusion of the coupling element is constructed on the side of the shape-locking protrusion of the coupling element opposite to the end. Preferably, additional shape-locking protrusions and / or shape-locking recesses of the coupling element are arranged in the end region of additional coupling elements. Preferably, the end region of the additional coupling element limits the end of the additional coupling element along the main extension axis of the additional coupling element.Preferably, viewed from the end of the other coupling element, the shape-locking protrusion of the other coupling element is arranged in front of the shape-locking recess of the other coupling element along the main extension axis of the other coupling element. Particularly preferably, the minimum distance between the end of the other coupling element and the shape-locking recess and / or force transmission surface of the other coupling element, oriented at least substantially parallel to the connection direction and / or the main extension axis of the other coupling element, is less than the minimum distance between the shape-locking recess and / or force transmission surface of the coupling element and the pushing protrusion, oriented at least substantially parallel to the connection direction and / or the main extension axis of the other coupling element, which corresponds particularly to the maximum longitudinal extension of the shape-locking recess of the coupling element. Particularly preferably, the difference between the minimum spacing, which is at least substantially parallel to the connection direction and / or the main extension axis of the coupling element, between the shape-locking recess and / or the force transmission surface of the coupling element and the pushing protrusion, and the minimum spacing, which is at least substantially parallel to the connection direction and / or the main extension axis of the coupling element, between the end of another coupling element and the shape-locking recess and / or the force transmission surface of another coupling element, is at least 1 mm, preferably at least 2 mm, and can also be considered as at least 3 mm.

[0015] Furthermore, it is proposed that the first and second connectors are each constructed at least substantially rod-shaped, wherein the connection direction, particularly in the fixed state of the fixed unit, is oriented at least substantially parallel to the longitudinal axis of the first connector and / or the longitudinal axis of the second connector. This enables an advantageously compact configuration of the connecting device, particularly for machine tools used in rod connections. This advantageously allows for simple and intuitive operation of the connecting device, particularly for pushing the two connectors into each other. "Substantially rod-shaped" should be understood in particular as a component, especially the first and second connectors respectively, wherein the longest edge of the smallest geometric cuboid that exactly completely surrounds the component is at least four times, preferably at least five times, preferably at least six times, and particularly preferably at least seven times the length of the two mutually perpendicular edges of the cuboid oriented perpendicularly to the longest edge. Preferably, the bases of the first and second connectors, particularly the first and second connectors, respectively have a basic cylindrical shape. Preferably, the bases of the first and second connectors, and especially the first and second connectors, are configured for fixing each other by a fixing unit and / or for pushing each other by a movement oriented along the connection direction to allow the coupling unit to transition into a coupled state. It is conceivable that the base of the first or second connector, and especially the first or second connector, has a defined receiving portion configured to receive the corresponding other connector at least partially parallel to the connection direction for fixing each other by a fixing unit and / or for allowing the coupling unit to transition into a coupled state. In particular, the bases of the first and / or second connectors, and especially the first and / or second connectors, are at least partially constructed as hollow cylinders. Preferably, the coupling elements extend at least substantially parallel to the longitudinal axis of the first connector and / or parallel to the longitudinal axis of the second connector, and preferably extend at least substantially within the base of the first or second connector. In a preferred configuration, the first connector defines the receiving portion, wherein the second connector is configured to be at least partially pushed into the first connector along the connection direction for fixing to each other by a fixing unit and / or for transitioning the coupling unit into a coupled state. Preferably, the second connector is configured to be at least substantially automatically fixed to the first connector by movement along the connection direction via the fixing unit. Preferably, the coupling unit is configured to transition into a coupled state at least substantially automatically when or after the second connector is pushed into the first connector along the connection direction, wherein preferably the coupling element and another coupling element are form-locked to each other in a region surrounded by the bases of the first and second connectors. In particular, the base of the first connector includes a segment configured as a hollow cylinder that defines the receiving portion. Preferably, the base of the first connector includes at least one additional segment that forms at least one stop for pushing the second connector into the receiving portion.In particular, this additional segment is constructed at least substantially hollow cylindrically and has an inner diameter smaller than that of the segment of the base of the first connector. It is conceivable that the base of the first connector is constructed in at least two pieces. Preferably, this additional segment is at least partially disposed within and / or at least partially formed within the segment. Preferably, the receiving portion is configured to receive the second connector, particularly on an extension constructed at least substantially parallel to the longitudinal axis of the second connector, such that at least a fixing element, particularly a locking element, is disposed in the region of the second connector surrounded by the first connector.

[0016] Furthermore, it is proposed that the coupling unit includes at least one coupling element, particularly the previously mentioned coupling element and / or the previously mentioned additional coupling elements, which are particularly capable of elastically oscillating within the coupling region of the coupling unit, particularly the previously mentioned coupling region, about an axis oriented at least substantially perpendicular to the connection direction, particularly the previously mentioned swing axis, specifically arranged in the vicinity of the connector including the coupling element, for transitioning to a coupled or decoupled state. This allows for an advantageously flexible arrangement of one or more coupling elements. Undesirable damage to the connectors can be advantageously prevented when the connectors are pushed into each other. Damage to the coupling elements and / or material fatigue can be advantageously prevented, especially because the coupling elements can be advantageously arranged unloaded in the connected state. This allows for advantageously flexible support and guidance of one or more coupling elements on the base of one or more coupling elements. Preferably, the swing axis of the coupling element and / or the support element of the first connector have a minimum distance of at least 8 cm, preferably at least 10 cm, and preferably at least 15 cm, oriented at least parallel to the longitudinal axis of the first connector, from the end of the first connector constructed along the longitudinal axis of the first connector facing the second connector. Preferably, the swing axis of the additional coupling element and / or the support element of the second connector have a minimum distance of at least 8 cm, preferably at least 10 cm, and preferably at least 15 cm, oriented parallel to the longitudinal axis of the second connector, from the end of the second connector facing the first connector along the longitudinal axis of the second connector. Preferably, the swing axis of the additional coupling element and / or the support element of the second connector are arranged behind the fixed element and / or behind the swing arm along the longitudinal axis of the second connector from the end of the second connector and / or the coupling region. Preferably, the fixed element and / or the swing arm are constructed as part of the second connector.

[0017] Furthermore, it is proposed that the fixing unit includes at least one locking element, particularly the aforementioned fixing element, for form-lockingly securing the second connector to the first connector. The locking element is configured to, in particular, at least substantially directly manipulate at least one coupling element, preferably the aforementioned additional coupling element, of the coupling unit when the locking element moves to release the fixing unit, wherein the coupling unit transitions from a coupled state to a decoupled state. This advantageously enables simple and direct coupling between the fixing unit and the coupling unit. Preferably, simultaneous separation of the fixing unit and the connecting unit is possible. Undesirable loads and potential damage to the coupling unit, particularly the coupling element, can be advantageously prevented when the connector is separated by the fixing unit. This allows for advantageously intuitive separation of the connecting device. Preferably, the fixing unit includes at least one actuating protrusion for manipulating the additional coupling element, which is fastened to or constructed as part of the fixing element. Preferably, the actuating protrusion is constructed as a single piece with the fixing element and / or the swing arm. "Substantially direct manipulation" should be understood in particular as the force exerted by the user on the fixing element in order to release the fixing unit's fixing element, for example, through the fixing element or a member arranged in a form-locking manner on the fixing element, particularly the form-locking between the manipulating protrusion and the manipulating coupling element of the coupling unit, particularly the other coupling element, to the coupling element of the coupling unit, particularly the other coupling element. Preferably, the locking element is configured to move in a direction oriented transverse to the connection direction, particularly toward the longitudinal axis of the second connector, by cooperating with the first connector, particularly the base of the first connector, when the first connector and the second connector are pushed into each other, wherein the other coupling element is preferably manipulated and moved about a swing axis in a direction oriented transverse to the connection direction. Preferably, the other coupling element is configured to separate from the coupling element during movement in a direction oriented transverse to the connection direction, wherein, in particular, the coupling unit transitions from a coupled state to a decoupled state.

[0018] Furthermore, it is proposed that the coupling unit includes at least one coupling element, particularly the aforementioned coupling element, which forms at least one force transmission surface. The coupling unit has at least one straight coupling direction perpendicular to the connection direction, in which the coupling element engages with another coupling element, particularly the aforementioned other coupling element, in this coupling direction. This coupling direction forms an angle greater than 90°, preferably greater than 95°, and preferably at least substantially 100° with the normal to at least one surface of the force transmission surface of the coupling element. This allows for an advantageously robust form-locking connection of the coupling elements. This advantageously prevents undesirable separation of the coupling elements when loaded along a direction at least substantially parallel to the connection direction. This enables an advantageously reliable connection. An advantageous vibration- and / or shock-resistant connection of the coupling elements can be achieved, preferably preventing movement of the coupling elements transversely to the connection direction. Preferably, the fastening of the coupling element relative to the base of the connector in the coupling region can be advantageously omitted. Preferably, the additional coupling element includes a force transmission surface, wherein the coupling direction forms an angle less than 85° and preferably at least substantially 80° with the normal to at least one surface of the force transmission surface of the additional coupling element. Preferably, the angle between the coupling direction and the main extension plane of the pushing protrusion is greater than 0°, more preferably greater than 3°, and more preferably at least 5°. Preferably, the force transmission surfaces of the coupling element and other coupling elements are arranged and / or configured such that these force transmission surfaces are at least partially abutted against each other by form-locking to prevent movement of the coupling element against the coupling direction and / or movement of other coupling elements along the coupling direction.

[0019] Furthermore, it is proposed that the coupling unit and / or fixing unit includes at least one safety element configured to at least substantially prevent the fixing unit from loosening and / or prevent the coupling unit from transitioning to a decoupled state, depending on the position of the coupling element of the coupling unit relative to the safety element. This advantageously prevents the separation of the coupling unit or the transition to a decoupled state, as well as the loosening of the fixing unit in a position of the coupling element different from its basic position. This advantageously ensures that the coupling element is always arranged in its basic position when the fixing unit and / or coupling unit are separated. Thus, the transition of the connecting unit to the coupling state can be ensured directly when the connectors are pushed back into each other. Preferably, the coupling element and the other coupling element can move together in the coupling state along an axis oriented at least substantially parallel to the connection direction and / or the longitudinal axis of the connector. Preferably, the coupling element is configured to transmit driving force to the other coupling element in the pulling direction or the moving direction. Preferably, the safety element is configured to activate and / or enable the loosening of the fixing unit and / or the transition of the coupling unit to the decoupled state solely for arranging the coupling element and the other coupling element in the decoupled region. Preferably, the decoupling region extends at least partially within the first connector and at least partially within the second connector along the longitudinal axis of the connector in the fixed state of the fixed unit. Preferably, the decoupling region is configured such that the additional coupling element, viewed along the longitudinal axis of the second connector, is at least partially arranged on the end of the second connector facing the first connector. In an exemplary configuration, a locking element is arranged on the fixed element and / or the swing arm and is configured to at least substantially prevent movement of the fixed element for releasing the fixed unit and / or transitioning the coupling unit to the decoupling state by form-locking with the coupling element and / or the additional coupling element in an arrangement of the coupling element and the additional coupling element different from the decoupling region. Preferably, the locking element is configured to release the fixed element and / or the swing arm for movement for releasing the fixed unit and / or transitioning the coupling unit to the decoupling state when the coupling element and the additional coupling element are arranged in the decoupling region.

[0020] Furthermore, it is proposed that the fixing unit includes at least one, particularly the aforementioned, actuating element, configured for releasing the fixing unit, wherein the first connector at least partially constitutes a handle unit, and wherein the actuating element is constructed as part of the second connector and is arranged, in particular, at least substantially independently of the state of the fixing unit, spaced apart from the first connector along the longitudinal axis of the second connector. This preferably advantageously prevents undesirable release of the fixing unit due to manipulation of the actuating element while the connecting device is held on the first connector. Preferably, the actuating element is arranged, in particular, fastened to the fixing element, in particular the locking element and / or the swing arm, and / or constructed as a single piece with the fixing element and / or the swing arm. Preferably, the actuating element is configured to move the fixing element and / or the swing arm laterally in the connection direction during manipulation, in particular toward the longitudinal axis of the second connector. Preferably, the base of the second connector defines at least one recess, wherein the actuating element is guided within the recess for manipulation. Preferably, the base of the second connector defines at least one additional recess, wherein the fixing element is guided, in particular by the swing arm, within the additional recess during lateral movement in the connection direction. Particularly preferably, with the first and second connectors fully pushed into each other along their longitudinal axes, additional recesses are arranged at least substantially at the height of the mating retaining elements. Preferably, the retaining elements, particularly those configured as locking elements, act / engage with the mating retaining elements in the fixed state of the retaining unit via additional recesses. Preferably, the first connector is at least partially configured as a handle unit of a machine tool, particularly a basic unit of a machine tool, wherein the operating element, particularly in the state where the second connector is fixed to the first connector, is arranged spaced apart from the handle unit. Preferably, the operating element is configured for operation by a force acting in a direction radially oriented relative to the longitudinal axis of the second connector.

[0021] Furthermore, it is proposed that the coupling unit includes at least one, particularly the aforementioned coupling element, and at least one additional coupling element, particularly the aforementioned additional coupling element, wherein the coupling element constitutes at least one, particularly the aforementioned pushing protrusion, the pushing protrusion being configured to push the additional coupling element along a pushing direction, particularly the aforementioned, oriented at least substantially parallel to the connection direction, in order to transmit driving force in the coupled state of the coupling unit, wherein the pushing protrusion has at least one outer contour extending at least substantially perpendicular to the connection direction, the outer contour being constructed corresponding to the outer contour of the shape-locking protrusion of the additional coupling element. This is particularly advantageous in preventing engagement between coupling elements in connection states different from those of the connecting unit, especially by means of the pushing protrusion and the shape-locking protrusion. When the coupling element and the additional coupling element move towards each other or toward each other parallel to the connection direction, it is advantageous in preventing the shape-locking protrusion of the additional coupling element from undesirably engaging with the pushing protrusion of the coupling element. Advantageously, after excessively moving toward each other and subsequently pulling the coupling element parallel to the connection direction, it is possible to allow the additional coupling element to slide over the pushing protrusion. This advantageously enables the coupling elements to move at least substantially automatically toward each other until they engage with each other in a form-locking manner via form-locking protrusions or form-locking recesses. Preferably, the outer contours of the pushing protrusions and the outer contours of the form-locking protrusions of the other coupling elements are constructed in a circular, preferably arcuate, or parabolic shape. Preferably, the pushing protrusion has an outer contour along its entire extension along the main extension axis of the coupling element, wherein, in particular, the outer side of the pushing protrusion extends at least substantially parallel to the main extension axis of the coupling element, defining the outer contour of the pushing protrusion. Preferably, the form-locking protrusions of the other coupling elements have a curved basic shape on one side of the outer contour of the form-locking protrusion of the other coupling element in a cross-sectional plane perpendicular to the main extension plane of the other coupling element and / or in a cross-sectional plane including the main extension axis of the other coupling element, particularly including the guide surface of the other coupling element. Preferably, the outer contour of the shape-locking protrusion of the additional coupling element defines the inner side of the shape-locking protrusion and / or the force transmission surface of the shape-locking protrusion of the additional coupling element, the inner side defining the shape-locking recess of the additional coupling element. Particularly preferably, the outer contour of the shape-locking protrusion of the additional coupling element is arranged on the end of the shape-locking protrusion facing the shape-locking recess of the additional coupling element. Preferably, the outer contour of the pushing protrusion and the outer contour of the shape-locking protrusion of the additional coupling element are constructed to coincide.

[0022] Furthermore, a machine tool system is proposed, comprising at least one machine tool, particularly a bar-connected one, at least one tool attachment for direct or indirect connection with the machine tool, at least one extension or adapter disposed between the machine tool and the tool attachment, and at least one connecting device according to the invention, wherein the connecting device is configured to connect the machine tool to the extension or adapter or to the tool attachment, or to connect the extension or adapter to the tool attachment.

[0023] Preferably, the tool is constructed as a bar-connected gardening tool. In particular, the tool can be constructed as bar-type garden shears, especially as bar-type pruning shears, bar-type hedge shears, bar-type chainsaws, or other tools that would be meaningful to those skilled in the art. In particular, the bar-connected tool is configured to perform work, especially cutting work, in an area above the average user's body size. In particular, the bar-connected tool is configured for cutting, sawing, and / or trimming branches of trees, hedges, or the like.

[0024] The tool attachment preferably includes at least one processing unit. The processing unit preferably includes at least one processing tool. This at least one processing tool can be configured in particular as a cutting blade, especially as a scissor blade, trimmer blade, saw chain, saw blade, or other processing tool that is meaningful to those skilled in the art. Preferably, the processing unit has at least two processing tools, especially cutting edges, wherein at least one processing tool is movably supported, especially pivotally supported, relative to at least one other processing tool. The machine tool preferably includes at least one drive unit. Preferably, the drive unit is configured to drive the movement of at least one processing tool. The drive unit particularly includes at least one motor, especially an electric motor. Preferably, especially rod-connected machine tools include at least one energy supply unit configured to provide energy, especially electrical energy, to at least the drive unit, especially the motor, for operation. Preferably, the energy supply unit is configured to provide energy to at least the drive unit independently of the power grid. In particular, the energy supply unit can be configured as a replaceable battery, storage capacitor, or other power grid-independent energy supply unit that is meaningful to those skilled in the art. Alternatively or additionally, it is conceivable that the energy supply unit is configured as a power grid-connected energy supply unit, especially as a power grid connector. Preferably, the drive unit is configured to drive the machining unit of the tool attachment, particularly at least one machining tool, in the connected state of the connecting device, especially in the coupled state of the connecting unit of the connecting device, for discontinuous motion. Preferably, the drive unit includes at least one transmission device through which the motor is operatively connected to at least one machining unit in the coupled state of the connecting unit. Preferably, the machine tool, particularly the drive unit, includes at least one force transmission device for transmitting driving force from the motor to the coupling element of the connecting device. In particular, the force transmission device is configured as part of the transmission device. Preferably, the force transmission device is configured as part of the drive unit. Preferably, the motor is configured as a screw for driving the force transmission device, particularly in motion about the longitudinal axis of the screw. Preferably, the force transmission device is configured to convert the rotational motion of the motor, preferably via a spindle nut arranged on the screw, into linear motion and transmit it to the coupling element. However, other configurations of the force transmission device for transmitting driving force parallel to the connecting direction to the coupling element are also contemplated. Preferably, the connecting device is configured to transmit driving force from the machine tool to the extension or adapter and / or tool attachment via the coupling element and additional coupling elements, preferably for moving the machining tool.

[0025] The machine tool preferably has at least one, especially at least substantially rod-shaped, basic unit, on which a drive unit and an energy supply unit are arranged and / or within the basic unit. It is conceivable that the drive unit and / or energy supply unit be detachably constructed. Preferably, tool attachments, especially machining units, can be arranged in the end region of the basic unit when viewed along its longitudinal axis via connecting devices. Preferably, the force transmission device is arranged such that the longitudinal axis of the screw is at least substantially parallel to the longitudinal axis of the basic unit. Preferably, the energy supply unit is arranged in a separate end region of the basic unit, opposite to the end region, along its longitudinal axis. Preferably, the basic unit at least partially, especially at least substantially completely, constitutes the housing of the machine tool. Preferably, the machine tool includes at least one operating device comprising at least two handle units arranged offset from each other along the longitudinal axis of the basic unit. One of the two handle units is configured as an operating element. Preferably, the force transmission device is arranged between the two handle units along the longitudinal axis of the basic unit. However, other configurations of the machine tool are also conceivable. In particular, the force transmission device is arranged inside the basic unit. Preferably, the drive unit is arranged, at least substantially, within the base unit between the two handle units. Alternatively, the drive unit may be arranged along the longitudinal axis of the base unit from the other of the two handle units, behind the handle units, particularly the operating element. The machine tool particularly includes a receiving device for securing an energy supply unit to the base unit. It is conceivable that the energy supply unit, when secured to the receiving device, is at least partially arranged within the base unit or received by the base unit. Preferably, the receiving device is arranged in an end region of the base unit. Preferably, the receiving device is arranged along the longitudinal axis of the base unit from the other handle unit, behind the handle units, particularly the operating element. Alternatively, the receiving device may be arranged along the longitudinal axis of the base unit between the two handle units. In particular, a coupling unit extends along the longitudinal axis of the base unit from the drive unit and / or force transmission device to the machining unit, wherein, in particular, the coupling unit, especially the coupling element, is arranged within a region of the base unit when viewed along the longitudinal axis of the base unit. Preferably, the force transmission device is configured to convert a motor-driven motion about the longitudinal axis of the screw into a motion oriented at least substantially parallel to the connecting direction and / or the longitudinal axis of the basic unit, particularly configured to transmit this motion to the machining unit via a coupling unit of the connecting device. Preferably, the force transmission unit and / or connecting unit are configured to transmit the driving force to the machining unit via a motion oriented at least substantially parallel to the longitudinal axis of the screw and / or the longitudinal axis of the basic unit, wherein preferably two machining tools move relative to each other by means of the driving force.

[0026] In a preferred configuration, the machine tool system includes a connecting device. Preferably, a first connector is arranged on the machine tool, particularly the basic unit, and is integrally constructed with the machine tool, particularly the basic unit. Preferably, an additional first connector is arranged on an extension or adapter. Preferably, a second connector is arranged on a tool accessory. Preferably, an additional second connector is arranged on the extension or adapter, preferably on the side of the extension or adapter opposite to the additional first connector. Preferably, the first connector can be connected to the second connector for securing and coupling the machine tool and the tool accessory, and can also be connected to the additional second connector for securing and coupling the machine tool and the extension or adapter. Preferably, the additional first connector can be connected to the second connector for securing and coupling the extension or adapter to the tool accessory.

[0027] Preferably, the extension or adapter includes a coupling element of the connecting device and additional coupling elements, which are connected in a form-locking and / or force-locking manner at least parallel to the connection direction. Preferably, the coupling element and additional coupling elements, constructed as part of the extension or adapter, are constructed as a single piece. In particular, the coupling element and additional coupling elements, constructed as part of the extension or adapter, extend together over at least substantially the entire longitudinal extension of the extension or adapter. Preferably, the coupling element and additional coupling elements, constructed as part of the extension or adapter, are at least substantially completely surrounded by a base of the extension or adapter, particularly along the longitudinal extension direction of the extension or adapter and around the longitudinal axis of the extension or adapter, the base including, in particular, the base of an additional first connector and the base of an additional second connector. Preferably, the extension or adapter is configured to transmit driving force, particularly mechanical force or form-locking force, from a coupling element configured as part of the first connector to another coupling element configured as part of the extension or adapter, when the extension or adapter is connected to the machine tool and tool accessory via a connecting device, to another coupling element configured as part of the second connector. Alternatively, the tool accessory may be directly connected to the machine tool via at least one connecting device, particularly by pushing the first and second connectors into each other.

[0028] Preferably, the different guide units of the connecting device comprise at least two differently constructed guide elements. Preferably, at least one guide element is arranged on a second connector or a first connector. Preferably, at least one additional guide element, particularly differently constructed from the stated guide element, is arranged on another first connector or another second connector. In particular, the guide units of the connecting device comprise at least two differently constructed receiving portions for receiving guide elements when the connectors are pushed into each other. Preferably, at least one receiving portion of one of the guide units is arranged on a second connector or a first connector. Preferably, at least one additional receiving portion of one of the guide units, particularly different from the stated receiving portion, is arranged on another first connector or another second connector. Preferably, the receiving portion of the guide unit is arranged on the machine tool via a first connector and configured to receive one of the two differently constructed guide elements. Preferably, the additional receiving portion of another guide unit of the connecting device is arranged on an extension or adapter via another first connector and configured to receive a guide element, particularly arranged on a tool attachment. In particular, the two guide elements have different cross-sections and / or lateral extensions. Particularly preferably, the guide element has a smaller cross-sectional area and / or lateral extension than other guide elements. Preferably, the other guide element has a larger cross-sectional area and / or lateral extension than other receiving portions of the guide unit. Preferably, the guide unit, especially the guide element and the receiving portion, is configured such that other extensions or adapters, especially those constructed substantially the same as the extension or adapter, cannot be arranged between the extension or adapter and the tool accessory, or between the machine tool and the extension or adapter, via a connecting device.

[0029] The machine tool system according to the invention enables the connection between the machine tool and tool accessories or extensions or adapters and / or tool accessories or adapters, particularly for a stable connection and simultaneous transmission of driving force between the respective components. This enables advantageous high user-friendliness. In particular, it advantageously prevents undesirable damage and / or incorrect connections caused by user errors in connecting the machine tool, extensions or adapters and / or tool accessories. This advantageously enables simple and cost-effective manufacturing and maintenance, especially because additional operating elements and / or drive elements can be eliminated. Preferably, an advantageous modular configuration of the machine tool system can be achieved, wherein, in particular, other adapters or the like for optionally arranging extensions or adapters between the machine tool and tool accessories can be advantageously eliminated.

[0030] Here, the connection device according to the invention and / or the machine tool system according to the invention should not be limited to the applications and embodiments described above. In particular, the connection device according to the invention and / or the machine tool system according to the invention may have a different number than the quantities mentioned herein for the working methods described herein. Furthermore, values ​​within the ranges given in this disclosure should also be considered public and can be used arbitrarily. Attached Figure Description

[0031] Other advantages are illustrated in the following figures. Two embodiments of the invention are shown in the figures. The figures, description, and claims contain a large number of combinations of features. Those skilled in the art can also suitably consider these features individually and conclude other meaningful combinations.

[0032] The attached diagram shows:

[0033] Figure 1 A three-dimensional schematic diagram illustrates a machine tool system according to the invention, comprising a machine tool with a bar connection, a tool accessory, and an extension, the machine tool including a connecting device according to the invention, the extension being stored on the machine tool by a retaining device.

[0034] Figure 2 This is a perspective view of the machine tool system according to the invention with the extension member assembled between the machine tool and the tool accessory.

[0035] Figure 3 A schematic diagram showing a cross-sectional side view of a machine tool system according to the invention, particularly in the area between the machine tool and the tool accessory, illustrating the connecting device according to the invention.

[0036] Figure 4 A schematic cross-sectional side view of a machine tool system according to the invention is shown in the region of the connecting device according to the invention, with the two connecting members of the connecting device pushed into each other.

[0037] Figure 5 A schematic diagram showing a cross-sectional side view of a machine tool system according to the invention in the region of the connecting device according to the invention when the connecting device is loosened or when the two connecting parts of the connecting device are separated.

[0038] Figure 6 A schematic side view showing the coupling region of the coupling element of the coupling unit and another coupling element of the connection device according to the present invention in the coupling state of the coupling unit;

[0039] Figure 7 This is a schematic diagram showing a three-dimensional view of the coupling region of the coupling unit and other coupling elements in the coupling state of the coupling unit.

[0040] Figure 8 A schematic perspective view showing two connectors of the connecting device according to the invention in a state in which the connectors are arranged separately from each other, and

[0041] Figure 9 A schematic diagram of a cross-section of the connecting device according to the invention, perpendicular to the connecting direction of the connecting device, is shown, which has an alternative configuration of the coupling element of the coupling unit of the connecting device. Detailed Implementation

[0042] Figure 1 and Figure 2 A machine tool system 10a is shown, comprising a machine tool 12a, a tool attachment 14a, and an extension or adapter 16a connected by a bar. The machine tool 12a is configured as a high-position branch pruner. However, other configurations of the machine tool 12a are also conceivable, such as a bar-type garden shear, particularly a bar-type pruning shear, bar-type hedge shear, bar-type chainsaw, or other machine tools that would be meaningful to those skilled in the art. The extension or adapter 16a is particularly configured as an intermediate member for extending the range of operation of the machine tool system 10a, particularly the distance between the tool attachment 14a and the machine tool 12a. Preferably, the extension or adapter 16a is configured to be arranged between the machine tool 12a and the tool attachment 14a. The machine tool system 10a includes a retaining device 18a for storing the extension or adapter 16a on the machine tool 12a. Figure 1 The image shows an extension or adapter 16a in a state where it is arranged by a retaining device 18a, and in particular fixed to a machine tool 12a.

[0043] Machine tool 12a includes a control device 20a for holding and operating machine tool 12a and / or machine tool system 10a. Machine tool 12a includes a base unit 22a, which at least partially constitutes the housing 24a of machine tool 12a. Base unit 22a is particularly part of control device 20a. Base unit 22a is at least substantially rod-shaped. Control device 20a includes two handle units 26a, 28a, arranged at least substantially coaxially and spaced apart from each other, each handle unit being configured to be held at least substantially by at least one hand of a user. The two handle units 26a, 28a are respectively arranged on base unit 22a or at least partially constituted as part of base unit 22a. Control device 20a includes a switching unit 30a for controlling at least one function, and in particular multiple functions, of machine tool 12a. Preferably, the machine tool 12a is functionally configured to be controllable by the switching unit 30a, enabling activation of the energy supply device of the machine tool 12a, particularly the energy supply device of the drive unit 32a of the machine tool 12a, and to control the drive unit 32a of the machine tool 12a. One of the two handle units 26a and 28a, handle unit 26a, is arranged on the base unit 22a. Handle unit 22a is configured as the operating element 34a of the switching unit 30a, which tubularly surrounds the base unit 22a in the region 36a in which the operating element 34a is arranged. The other handle unit 28a of the two handle units 26a and 28a is configured as part of the base unit 22a. The control element 34a is movably supported relative to the base unit 22a and / or relative to another handle unit 28a of the two handle units 26a, 28a along at least two different motion paths 38a, 40a, wherein at least one of the two different motion paths 38a, 40a follows rotational motion, particularly rotational motion about the longitudinal axis 42a of the base unit 22a and / or about the longitudinal axis 44a of the control element 34a.

[0044] Machine tool 12a includes a drive unit 32a configured to provide driving force for driving at least one machining tool 46a, 48a of machining unit 50a of tool accessory 14a. Drive unit 32a includes a motor 52a, which is particularly configured as an electric motor. It is conceivable that motor 52a is configured as a brushless DC motor. Alternatively, other configurations of motor 52a are also conceivable. Machine tool 12a, particularly drive unit 32a, includes a force transmission device 54a. Preferably, force transmission device 54a is configured to convert and / or directionally transmit the force generated by motor 52a. In particular, force transmission device 54a is configured to drive the driven element (in...) of motor 52a... Figure 1 and 2The rotational motion (not shown) is converted into motion oriented at least substantially parallel to the longitudinal axis 42a of the machine tool 12a, particularly the basic unit 22a, wherein the driven element is preferably configured as a drive shaft. In particular, the longitudinal axis 42a of the basic unit 22a includes the longitudinal axis of the machine tool. The force transmission device includes a screw (not shown) connected to the drive shaft of the motor 52a. Figure 1 and 2 (not shown in the image), the main shaft nut arranged on the screw ( Figure 1 and 2 (not shown in the image), and multiple balls for transmitting force between the screw and the spindle nut. Figure 1 and 2 (Not shown in the image). The screw and the spindle nut together define at least one guide channel, in particular exactly two guide channels, around the screw for guiding the balls. In particular, the balls are configured to convert the rotational motion of the screw into the translational motion of the spindle nut by movement along the at least one guide channel. The spindle nut consists of at least two, in particular exactly three segments. Each of the two guide channels is defined at least partially by two of the three segments at each position along the guide path around the screw along the respective guide channel. However, other configurations of the force transmission device 54a are also conceivable, such as having a one-piece spindle nut and / or having a different number of guide channels for supporting elements.

[0045] The machine tool system 10a includes a connecting device 66a for connecting the machine tool 12a to an extension or adapter 16a or a tool accessory 14a and / or for connecting the tool accessory 14a to the extension or adapter 16a. Figure 1 In this configuration, tool accessory 14a is connected to machine tool 12a via connecting device 66a. However, it is also possible for tool accessory 14a to be connected to extension or adapter 16a via connecting device 66a, and then extension or adapter 16a to machine tool 12a via connecting device 66a (see [link to relevant documentation]). Figure 2The connecting device 66a includes at least one first connector 68a, 70a, preferably exactly two first connectors 68a, 70a, especially the first connector 68a and another first connector 70a, which are respectively constructed as part of the basic unit 22a of the machine tool 12a or as part of the extension or adapter 16a. The first connector 68a is constructed as part of the machine tool 12a. Specifically, the first connector 68a is fixed to the basic unit 22a. The other first connector 70a is constructed as part of the extension or adapter 16a, especially as fixed to the base of the extension or adapter 16a. The connecting device 66a includes at least one second connector 72a, 74a, preferably exactly two second connectors 72a, 74a, especially the second connector 72a and another second connector 74a, which are respectively constructed as part of the extension or adapter 16a or as part of the tool accessory 14a. The second connector 72a is constructed as part of the tool accessory 14a, especially as fixed to the base of the tool accessory 14a. The additional second connector 74a is constructed as part of the extension or adapter 16a, particularly fixed to the base of the extension or adapter 16a. Preferably, the first connector 68a and the additional first connector 70a are respectively connectable to the second connector 72a and the additional second connector 74a. In particular, in each operating state of the connecting device 66a, the first connector 68a and the additional first connector 70a are connected to at most one of the two second connectors 72a, 74a. The connecting device 66a includes a fixing unit 76a configured to fix one of the two second connectors 72a, 74a, particularly the second connector 72a or the additional second connector 74a, respectively, to one of the two first connectors 68a, 70a, particularly the first connector 68a or the additional first connector 70a, by movement along a connection direction 78a that is at least substantially straight. The connecting device 66a includes a coupling unit 80a, which, at least in the coupled state, is configured to transfer a driving force at least substantially parallel to the connecting direction 78a from one of the first connecting members 68a, 70a, particularly the coupling unit 80a. Figure 1 and 2 A coupling element 87a, 88a (not shown) (this coupling element is constructed as part of one of the first connectors 68a, 70a) is transferred to one of the second connectors 72a, 74a, especially the coupling unit 80a (in Figure 1 and 2Additional coupling elements 89a and 90a (not shown) (this additional coupling element is constructed as part of one of the second connectors 72a and 74a). The fixing unit 76a of the connecting device 66a is configured to at least substantially automatically fix the first connectors 68a and 70a, especially the first connector 68a or another first connector 70a, and the second connectors 72a and 74a, especially the second connector 72a or another second connector 74a, to each other, either when or after the respective first connectors 68a and 70a and the respective second connectors 72a and 74a are pushed into each other along the connecting direction 78a. The coupling unit 80a is configured to at least substantially automatically transition to the coupling state of the coupling unit 80a, either when or after the respective first connectors 68a and 70a and the respective second connectors 72a and 74a are pushed into each other along the connecting direction 78a. In particular, the coupling unit 80a is configured to transmit driving force from the first connectors 68a and 70a to the second connectors 72a and 74a, preferably through coupling elements 87a, 88a, 89a, and 90a, in the coupled state.

[0046] The extension or adapter 16a is constructed at least substantially in a rod shape. The extension or adapter 16a is configured for arrangement and / or force transmission between the machine tool 12a and the tool attachment 14a, and / or for securing the tool attachment 14a to the machine tool 12a. The extension or adapter 16a is retractable, preferably secured, to the machine tool 12a, particularly the base unit 22a, via a retaining device 18a. The retaining device 18a is arranged at least substantially entirely on the lower side 82a of the machine tool 12a. The retaining device 18a includes a fixing unit 84a for securing the extension or adapter 16a to the machine tool 12a, particularly the base unit 22a. The handle units 26a and 28a of the machine tool 12a, particularly the operating device 20a, are particularly constructed in a rod shape. The fixing unit 84a of the retaining device 18a is arranged along the longitudinal axis 42a of the machine tool 12a between the two handle units 26a and 28a. Preferably, the fixing unit 84a of the retaining device 18a is at least partially arranged on the basic unit 22a, and preferably is at least partially constructed as a single piece with the outer wall of the basic unit 22a, and especially the outer wall of the basic unit 22a arranged on the lower side 82a of the machine tool 12a. Preferably, the fixing unit 84a of the retaining device 18a, when viewed perpendicularly to the longitudinal axis 42a of the machine tool 12a, is arranged at least substantially completely between the two handle elements 26a, 28a and especially spaced apart from the areas defined by the handle elements 26a, 28a, which extend around the longitudinal axis 42a of the machine tool 12a. The retaining device 18a and / or the basic unit 22a are configured such that the extension or adapter 16a, when fixed to the basic unit 22a, especially when at least substantially perpendicular to the longitudinal axis 42a of the machine tool 12a, has a minimum distance 86a with at least one of the handle units 26a, 28a, preferably with the main gripping area 92a of the handle unit 26a, such minimum distance is at least 1.5 cm, preferably at least 2 cm and preferably at least 2.2 cm, and / or the ratio of the minimum distance 86a between the extension or adapter 16a and at least one of the handle units 26a, 28a, preferably with the main gripping area 92a of the handle unit 26a, and the maximum lateral extension 94a of the corresponding handle unit 26a, 28a, especially the handle unit 26a, is at least 0.35, preferably at least 0.4, and preferably at least 0.45, respectively.

[0047] The drive unit 32a and the force transmission device 54a are at least substantially entirely arranged inside the basic unit 22a and / or surrounded by the housing 24a of the machine tool 12a, especially through the basic unit 22a. The switching unit 30a, especially except for the operating element 34a, is at least substantially arranged inside the basic unit 22a and / or surrounded by the housing 24a of the machine tool 12a, especially through the basic unit 22a. The coupling unit 80a of the connecting device 66a extends at least substantially entirely inside the machine tool 12a, especially the basic unit 22a, the extension or adapter 16a, and the tool accessory 14a. The first connector 68a, the additional first connector 70a, the second connector 72a, and the additional second connector 74a are each constructed at least substantially in a rod shape. The connection direction 78a of the connecting device 66a is oriented at least substantially parallel to the longitudinal axis 154a of the first connecting member 68a, the additional first connecting member 70a, the second connecting member 72a, and / or the additional second connecting member 74a, especially in the fixed state of the fixing unit 76a of the connecting device 66a. Preferably, at least the connecting members 68a, 70a, 72a, and 74a of the connecting device 66a are arranged at least substantially coaxially with each other, especially in the connected state and / or fixed state of the fixing unit 76a of the connecting device 66a (see...). Figure 2 ).

[0048] The retaining device 18a includes a fastening unit 98a for fastening an extension or adapter 16a, which is fixed to the machine tool 12a, particularly by means of a fixing unit 84a. The fastening unit 98a includes a fastening element 100a disposed on the machine tool 12a, particularly on the base unit 22a, and configured to retain the extension or adapter 16a. The fixing unit 84a of the retaining device 18a includes a fixing element configured to receive a recess 102a, disposed on and / or integrally constructed with the base unit 22a. Preferably, the base unit 22a limits the fixing unit 84a of the retaining device 18a to the fixing element receiving the recess 102a. The handle unit 26a, configured as an operating element 34a, is arranged along the longitudinal axis 42a of the basic unit 22a of the operating device 20a between the fixing unit 84a of the holding device 18a, and in particular between the receiving recess 102a of the fixing unit 84a and the fastening element 100a.

[0049] The processing unit 50a of tool accessory 14a preferably includes a movably supported processing tool 46a and a fixed additional processing tool 48a. The movably supported processing tool particularly includes a tool or cutter, and the additional processing tool particularly includes a tool or cutter. Processing tools 46a and 48a can be configured as cutting blades, as exemplarily in this embodiment, particularly as scissor blades, trimmer blades, saw chains, saw blades, or other processing tools that are meaningful to those skilled in the art. Preferably, processing tool 46a is movable relative to the additional processing tool 48a by a driving force for cutting and / or opening. Preferably, the machining tool 46a and / or the additional machining tool 48a are constructed and / or supported such that the machining tool 46a and the additional machining tool 48a move toward each other for cutting by a driving force acting on the machining tool 46a in the forward direction 104a and / or the moving direction 104a, and move apart and / or separate from each other for release, especially at least in the cutting area, by a driving force acting on the machining tool 46a in the rearward direction 106a and / or the pulling direction 106a. In particular, the forward direction 104a and / or the moving direction 104a and the rearward direction 106a and / or the pulling direction 106a are respectively oriented at least substantially parallel to the longitudinal axis 42a of the basic unit 22a and / or parallel to the connection direction 78a. Preferably, the drive unit 32a is configured to drive the movement of the machining tool 46a, especially when the machine tool 12a is connected to the tool attachment 14a. Preferably, the drive unit 32a is configured to drive the machining unit 50a, and in particular the machining tool 46a, to perform discontinuous movements. Other configurations of the tool attachment 14a, and in particular the machining unit 50a, are also conceivable, such as having more than one drivable and / or movable machining tool 46a and / or having more than two or fewer machining tools 46a, 48a.

[0050] Machine tool system 10a and / or machine tool 12a include an energy supply unit (in Figure 1 and 2(Not shown in the image), the energy supply unit is configured to provide energy, particularly electrical energy, for operation of at least the drive unit 32a, especially the motor 52a, and / or the switching unit 30a, especially the electronic unit 110a of the switching unit 30a. The energy supply unit is configured to provide energy to at least the drive unit 32a and / or the switching unit 30a independently of the power grid. The energy supply unit is constructed, in particular, as a replaceable battery. However, other configurations of the energy supply unit are also conceivable, such as as a battery, as a storage capacitor, or as other grid-independent energy supply units that would be meaningful to those skilled in the art. Alternatively or additionally, it is conceivable that the energy supply unit is constructed as a grid-connected energy supply unit, in particular as a grid connection. The machine tool 12a includes a receiving device 112a for receiving the energy supply unit. In particular, the receiving device 112a is configured to secure the energy supply unit to the machine tool 12a, especially the base unit 22a, and to electrically connect at least the drive unit 32a and / or the switching unit 30a to the energy supply unit.

[0051] Preferably, the machine tool 12a, especially the basic unit 22a, has two mutually opposing end regions 114a and 116a along the longitudinal axis 42a of the machine tool 12a. In particular, a first connector 68a is arranged in one of the end regions 114a and 116a, and preferably a receiving device 112a is arranged in the other end region 116a. Preferably, a fastening unit 98a is arranged along the longitudinal axis 42a of the machine tool 12a and / or the basic unit 22a between the handle unit 26a, especially the operating element 34a, and the receiving recess 102a. A further handle unit 28a is arranged along the longitudinal axis 42a of the machine tool 12a and / or the basic unit 22a between the first connector 68a and the fixing unit 84a of the retaining device 18a. It is conceivable that the first connector 68a at least partially constitutes the main gripping area of ​​the further handle unit 28a, especially the further handle unit 28a. The basic unit 22a includes a receiving region 118a, which is configured as part of the receiving device 112a and at least partially constitutes the housing 24a of the machine tool 12a. It is also conceivable that the receiving region 118a at least partially defines the receiving device 112a. The fastening unit 98a of the retaining device 18a, particularly the fastening element 100a, is preferably constructed as a single piece with and / or arranged in the vicinity of the receiving region 118a. The outer wall 120a of the housing of the basic unit 22a, particularly the basic unit 22a, constitutes the receiving region 118a. In particular, the outer wall 120a is adjacent to the receiving device 112a. The outer wall 120a of the housing of the basic unit 22a, in particular, at least partially covers the power supply unit via the receiving area 118a or the receiving device 112, especially when viewed from the direction oriented towards the power supply unit along a longitudinal axis 42a at least substantially parallel to the basic unit 22a. The retaining unit 84a of the retaining device 18a includes a receiving recess 102a, a retaining element 122a, and a protrusion 124a, which is arranged on the extension or adapter 16a via the retaining element 122a. The retaining element 122a of the retaining unit 84a at least substantially completely surrounds the extension or adapter 16a, in particular, its outer wall, around the longitudinal axis 126a of the extension or adapter 16a. Alternatively, the fixing element 122a of the fixing unit 84a may be configured such that the fixing element 122a surrounds only the majority of the extension or adapter 16a, especially the outer wall of the extension or adapter 16a, around the longitudinal axis 126a of the extension or adapter 16a, preferably for fixing the fixing element 122a and the protrusion 124a to the extension or adapter 16a in a shape-locking manner.Preferably, the extension or adapter 16a is configured to be secured to the machine tool 12a, especially the base unit 22a, by means of a fixing unit 84a via a receiving direction 128a oriented at least substantially parallel to the longitudinal axis 42a of the machine tool 12a and / or the base unit 22a, by movement relative to the machine tool 12a, wherein, in particular, the protrusion 124a is received at least substantially in the receiving recess 102a. Preferably, the extension or adapter 16a is connected to the machine tool 12a, especially the base unit 22a, by form-locking and / or force-locking of the protrusion 124a and the receiving recess 102a. In particular, the fastening unit 98a is configured to fasten and / or retain the extension or adapter 16a in the state of being secured to the machine tool 12a, especially the base unit 22a, by means of the fixing unit 84a of the retaining device 18a, to prevent movement around or against the fixing unit 84a, especially the receiving recess 102a. Preferably, the fastening unit 98a, and in particular the fastening element 100a, is configured to hold the extension or adapter 16a in a form-locking and / or force-locking manner on the base unit 22a against forces acting at least substantially around an axis perpendicular to the longitudinal axis 126a of the extension or adapter 16a, and in particular around a fastening element 122a extending through the fixing unit 84a of the retaining device 18a and intersecting the longitudinal axis 126a of the extension or adapter 16a and / or the longitudinal axis 42a of the base unit 22a. Viewed from the fixing unit 84a of the retaining device 18a, the fastening unit 98a is arranged behind the handle unit 26a along the longitudinal axis 42a of the machine tool 12a. Preferably, the fastening element 100a is constructed as a shape member that defines a shape-locking receiving portion, wherein, in order to be fixed to the base unit 22a, particularly in the state where the extension or adapter 16a is fixed to the machine tool 12a by the retaining device 18a, the extension or adapter 16a is at least partially surrounded and / or received by the fastening element 100a, particularly inside the shape-locking receiving portion. The fastening element 100a has a contact surface 130a that defines the shape-locking receiving portion. In particular, the extension or adapter 16a is configured to abut against the contact surface 130a by the fastening unit 98a for fixing to the machine tool 12a. Preferably, the contact surface 130a is constructed corresponding to the outer contour of the extension or adapter 16a when viewed along the longitudinal axis 126a of the extension or adapter 16a and / or the base unit 22a.

[0052] The coupling unit 80a of the connecting device 66a includes at least one coupling element 87a, 88a, particularly exactly two coupling elements 87a, 88a, preferably coupling element 87a and another coupling element 88a, and includes at least one additional coupling element 89a, 90a, particularly exactly two additional coupling elements 89a, 90a, preferably additional coupling element 89a and another additional coupling element 90a (in Figure 1 and 2 (Not shown in the image). In particular, coupling element 87a is constructed as part of the first connector 68a and is arranged on the machine tool 12a. In particular, another coupling element 89a is constructed as part of the second connector 72a and is arranged on the tool attachment 14a. In particular, another coupling element 88a is constructed as part of another first connector 70a and is arranged on the extension or adapter 16a. In particular, another additional coupling element 90a is constructed as part of another second connector 74a and is arranged on the extension or adapter 16a. Coupling element 87a is at least substantially surrounded by the base of the first connector 68a and / or by the housing 24a of the machine tool 12a, which is in particular part of the basic unit 22a. It is conceivable that, in at least one operating state, particularly in the state where the machine tool 12a is separated from the tool attachment 14a and the extension or adapter 16a, the coupling element 87a extends at least partially from the base of the first connector 68a and / or the opening of the housing 24a of the machine tool 12a, which is particularly part of the basic unit 22a. The coupling element 87a is preferably configured for form-locking and / or force-locking connection with another coupling element 89a and / or another additional coupling element 90a on the tool attachment 14a and / or the extension or adapter 16a for transmitting driving force. In the state where the extension or adapter 16a is arranged between the machine tool 12a and the tool attachment 14a (see...), Figure 2 Preferably, another additional coupling element 90a is configured to transmit driving force to another coupling element 88a. In particular, the other additional coupling element 90a and the other coupling element 88a are constructed as a single piece or at least resist movement oriented at least substantially parallel to the longitudinal axis 126a of the extension or adapter 16a and / or the connection direction 78a of the connecting device 66a, and are connected to each other in a form-locking and / or force-locking manner. Preferably, the other additional coupling element 90a and the other coupling element 88a extend together along the entire longitudinal extension of the extension or adapter 16a. In particular, the other additional coupling element 90a and the other coupling element 88a are at least substantially completely surrounded by the outer wall of the extension or adapter 16a along the entire longitudinal extension of the extension or adapter 16a. In the state where the extension or adapter 16a is arranged between the machine tool 12a and the tool attachment 14a (see...), Figure 2Another coupling element 88a is configured to transmit driving force to another coupling element 89a through a form-locking and / or force-locking connection with the other coupling element 89a, in particular for driving the machining tool 46a to move.

[0053] The actuating element 34a, along its longitudinal extension 138a, at least substantially completely surrounds the basic unit 22a around its longitudinal axis 42a. In particular, the actuating element 34a is configured as an actuating sleeve. It is also conceivable that the actuating element 34a surrounds only the most extensive portion of the basic unit 22a around its longitudinal axis 42a, wherein the actuating element 34a, for example, has a recess at least partially along its longitudinal extension 138a and / or has a C-shaped basic shape when viewed along its longitudinal extension 138a. The movement path 38a of the two different movement paths 38a, 40a of the actuating element 34a preferably extends arcuately within a plane oriented at least substantially perpendicular to the longitudinal axis 42a of the basic unit 22a. The other motion path 40a of the two different motion paths 38a and 40a of the control element 34a moves in a straight line and extends at least substantially parallel to the longitudinal axis 42a of the base unit 22a and at least substantially perpendicular to the motion path 38a. In particular, the two different motion paths 38a and 40a of the control element 34a are adjacent to and / or transition to each other at the ends of the motion paths 38a and 40a, respectively. Preferably, viewed from the connecting device 66a, especially the first connecting member 68a, a handle unit 26a is arranged on the base unit 22a behind the other handle unit 28a of at least two handle units 26a and 28a, which is configured as the control element 34a of the switching unit 30a. The actuating element 34a has a maximum longitudinal extension 138a, which is oriented at least substantially parallel to the longitudinal axis 42a of the basic unit 22a, particularly when the actuating element 34a is arranged on the basic unit 22a. The maximum longitudinal extension 138a is at least two times, preferably at least three to six times, larger than the maximum lateral extension 140a of the actuating element 34a, which is oriented at least substantially perpendicular to the maximum longitudinal extension 138a. In at least one cross-sectional plane of the actuating element 34a including its longitudinal axis 44a, the actuating element 34a has a basic shape that is at least substantially dumbbell-shaped, particularly mirror-symmetrical with respect to its longitudinal axis 44a. In particular, the actuating element 34a has a maximum lateral extension 140a that is larger than that in the intermediate region 146a of the actuating element 34a arranged between the two end regions 142a and 144a constructed along the longitudinal extension 138a of the actuating element 34a. Preferably, the actuating element 34a is tapered in the intermediate region 146a.Preferably, the maximum extension of the intermediate region 146a along the maximum longitudinal extension 138a of the actuating element 34a is significantly greater than that of the respective end regions 142, 144a along the maximum longitudinal extension 138a of the actuating element 34a, particularly at least twice, preferably at least three times, and preferably at least four times larger. Preferably, the actuating element 34a has at least one outer surface 148a oriented inclined to the longitudinal axis 44a of the actuating element 34a in the transition region located between the end regions 142a, 144a and the intermediate region 146a of the actuating element 34a, respectively. In particular, the outer surface 148a of the actuating element 34a has an angle relative to the longitudinal axis 44a of the actuating element 34a between 10° and 80°, preferably between 20° and 70°, and preferably between 30° and 60°. It is conceivable that the operating element 34a has recesses, particularly finger grooves, non-slip, particularly rubber-coated inserts, surface-structured portions, and / or surface coatings, for achieving a high grip on the operating element 34a in the middle region 146a, on the outer surface 148a, and / or in the end regions 142a, 144a. Preferably, the middle region 146a of the operating element 34a is configured as the main grip region 92a of the operating element 34a. Alternatively, it is conceivable, particularly in the middle region 146a, that the operating element 34a has a basic shape that is at least partially angular in a cross-sectional plane oriented perpendicular to the longitudinal axis 44a of the operating element 34a. For example, the operating element 34a has two edges on the upper side parallel to the longitudinal axis 44a of the operating element 34a and is circularly, particularly arcuately, constructed on the lower side. Additionally, it is conceivable that a separate handle unit 28a has at least partially an asymmetrical or angular basic shape. In particular, the control element 34a has a maximum lateral extension 140a in the end region 142a facing the other handle unit 28a of its two end regions 142a, 144a, which at least substantially corresponds to the maximum lateral extension of the base unit 22a in the region of the base unit 22a adjacent to the end region 142a along the longitudinal axis 42a of the base unit 22a. In particular, the control element 34a is at least substantially flush with the base unit 22a in the end region 142a facing the other handle unit 28a, except for the gap for moving the control element 34a.

[0054] Figure 2The diagram shows a machine tool system 10a in its extended state via an extension or adapter 16a. The extension or adapter 16a is arranged between the machine tool 12a and the tool accessory 14a via a connecting device 66a. In particular, in the extended state of the machine tool system 10a, a first connector 68a is connected to another second connector 74a, wherein, in particular, the first connector 68a is fixed to the other second connector 74a, and driving force can be transmitted, in particular, from the machine tool 12a, and in particular the first connector 68a, to the extension or adapter 16a, and in particular the other second connector 74a, via a coupling element 87a and another additional coupling element 90a. In particular, in the extended state of the machine tool system 10a, an additional first connector 70a is connected to a second connector 72a, wherein, in particular, the additional first connector 70a is fixed to the second connector 72a, and is able to transmit driving force, in particular, from the extension or adapter 16a, in particular the additional first connector 72a, to the tool accessory 14a, in particular the second connector 72a, or the machining tool 48a, via another coupling element 88a and another coupling element 89a.

[0055] Other configurations of the machine tool 12a, particularly the basic unit 22a, the drive unit 32a, and / or the receiving device 112a, the extension or adapter 16a, the connecting device 66a, and / or the holding device 18a, are also conceivable. For example, it is conceivable to arrange the receiving device 112a, which receives energy from the power supply unit along the longitudinal axis 42a of the machine tool 12a, between the two handle units 46a, 48a, and / or to arrange the drive unit 32a along the longitudinal axis 42a of the machine tool 12a, particularly the end region 114a of the basic unit 22a including the first connecting member 68a, between the machine tool 12a and another handle unit 28a. Alternatively, it is conceivable to arrange the drive unit 32a along the longitudinal axis 42a of the machine tool 12a from the other handle unit 28a behind the handle unit 26a, particularly the operating element 34a, preferably on the receiving device 112a. It is conceivable that the various components of the machine tool 12a, especially the drive unit 32a, the force transmission device 54a, the receiving device 112a, or the like, are configured to be detachable and / or replaceable from the basic unit 22a.

[0056] exist Figures 3 to 9 The connection points of the connecting device 66a are shown, wherein one of the first connecting members 68a and 70a is connected to one of the second connecting members 72a and 74a, respectively. The shown connection points are at least substantially independent of the components to be connected by the connecting device 66a, i.e., for example, independent of the connection between the machine tool 12a and the tool accessory 14a, or with the extension or adapter 16a. Figures 3 to 9The text describes components arranged in the areas of the illustrated connection points, which can be transferred to each connection point of the connection device 66a of the machine tool system 10a. Preferably, in... Figures 3 to 9 The connection between the extension or adapter 16a and the tool accessory 14a is shown in the figure (see Figure 14). Figure 2 However, the connection between the machine tool 12a and the extension or adapter 16a, or between the machine tool 12a and the tool accessory 14a, is constructed at least substantially similarly.

[0057] exist Figures 3 to 5 The image shows a sectional side view of the connecting device 66a, particularly in the area of ​​the connecting part. Figure 3 A connecting device 66a is shown in a fixed state of fixing unit 76a and a coupled state of coupling unit 80a, wherein, in particular, an additional first connector 70a (hereinafter referred to as the first connector) is connected to a second connector 72a. The fixing unit 76a of the connecting device 66a includes a fixing element configured as a locking element 150a, which is set to at least substantially automatically fix the first connector 70a and the second connector 72a when they are pushed into each other. The fixing unit 76a includes the locking element 150a for form-locking the second connector 72a onto the first connector 70a, wherein the locking element 150a is configured to at least substantially directly manipulate at least one coupling element 87a, 88a of the coupling unit 80a when the locking element 150a moves to release the fixing unit 76a, wherein the coupling unit 80a transitions from a coupled state to a decoupled state (see [link to documentation]). Figure 5 The locking element 150a is particularly arranged in the region of the additional coupling element 89a on the second connector 72a, and is configured to manipulate the additional coupling element 89a, at least substantially directly, when the locking element 150a moves to release the fixing unit 76a. The locking element 150a is connected to and fixed to the base of the second connector 72a via a swing arm 152a. In particular, the locking element 150a is capable of elastic movement transversely to the connection direction 78a via the swing arm 152a, preferably elastically moving in a direction 164a oriented from the inside of the base of the second connector 72a toward the longitudinal axis 154a of the second connector 72a. The locking element 150a is connected to the base of the second connector 72a at one location via the swing arm 152a, particularly in a material-locking manner or at least in a force-locking and / or form-locking manner. In particular, the swing arm 152a is flexibly constructed and is materially locked to the base of the second connector 72a and to the locking element 150a. However, other configurations of the swing arm 152a are also conceivable, such as having a support portion or the like on the base of the second connector 72a.

[0058] The fixing unit 76a includes an actuating protrusion 156a for manipulating another coupling element 89a, which is fastened to the locking element 150a and the swing arm 152a. Preferably, the actuating protrusion 156a is constructed as a single piece with the locking element 150a and the swing arm 152a. The locking element 150a is configured to transmit the force exerted on the locking element 150a by the user, for example, the actuating element 158a of the fixing unit 76a, for releasing the fixing unit 76a, through the locking element 150a or a form-locking member arranged on the locking element 150a, particularly the form-locking between the actuating protrusion 156a and the other coupling element 89a to be manipulated in the coupling unit 80a, to the other coupling element 89a. Preferably, the locking element 150a is configured to move in a direction 164a, oriented transversely to the connection direction 78a, particularly toward the longitudinal axis 154a of the second connector 72a, when the first connector 70a and the second connector 72a are pushed into each other, through the interaction with the first connector 70a, especially the base of the first connector 70a. Preferably, a further coupling element 89a is manipulated and moves about its swing axis 159a in the direction 164a, transversely to the connection direction 78a. Preferably, the further coupling element 89a is configured to separate from the other coupling element 88a during movement in the direction 164a, transversely to the connection direction 78a, wherein, in particular, the coupling unit 80a transitions from a coupled state to a decoupled state. The coupling unit 80a includes two coupling elements 87a and 88a and two additional coupling elements 89a and 90a, which engage with each other in the coupled state of the coupling unit 80a. The locking element 150a is configured to manipulate the additional coupling element 89a or another additional coupling element 90a, particularly at least tilted towards the connection direction 78a, when the first connector 70a and the second connector 72a are pushed into each other. Other configurations of the fixing elements of the fixing unit 76a of the connecting device 66a are also contemplated, particularly configurations different from the locking element 150a.

[0059] Preferably, the locking element 150a is constructed and / or arranged such that when the first connector 70a and the second connector 72a are pushed into each other, the locking element 150a engages at least substantially automatically and / or is arranged on the mating fixing element 160a of the fixing unit 76a, the mating fixing element being constructed as a mating locking element or as the inner wall defining a recess. In particular, the locking element 150a has at least one guide surface 162a, which is inclined in the basic state of the locking element 150a to the connection direction 78a and to a plane oriented perpendicular to the connection direction 78a. Preferably, the mating fixing element 160a is constructed as part of the base of the first connector 70a and defines at least one recess configured to receive the locking element 150a. The recess defined by the mating fixing element 160a is defined by the first connector 70a, and in particular by the base of the first connector 70a. Preferably, the locking element 150a is configured to cooperate with the first connector 70a, and especially with the base of the first connector 70a, when the first connector 70a and the second connector 72a are pushed into each other, particularly via the guide surface 162a. Specifically, the locking element 150a is at least partially, preferably, elastically movable via the swing arm 152a in a direction 164a oriented transversely to the connection direction 78a. Preferably, the locking element 150a is configured to slide along the first connector 70a, and especially the base of the first connector 70a, via the guide surface 162a during the pushing of the first connector 70a and the second connector 72a into each other, preferably until the locking element 150a reaches the mating fixing element 160a in the connection direction 78a. Preferably, the locking element 150a is configured to engage at least substantially automatically with the mating fixing element 160a, particularly when or after the first connector 70a and the second connector 72a are fully pushed into each other, by a restoring force caused, particularly by the swing arm 152a, for securing the first connector 70a and the second connector 72a to each other. Preferably, the locking element 150a is configured to load an additional coupling element 89a with a force tilted to the connection direction 78a by movement along a direction 164a transverse to the connection direction 78a when the first connector 70a and the second connector 72a are pushed into each other, wherein, in particular, the additional coupling element 89a is manipulated. Preferably, the locking element 150a and / or the swing arm 152a are configured and / or arranged such that when the first connector 70a and the second connector 72a are pushed into each other, the locking element 150a moves about the swing axis 166a of the locking element 150a by at least 5°, preferably at least 10° and preferably at least 15° and / or at most 45°, preferably at most 30° and preferably at most 20°, said swing axis being oriented particularly perpendicular to the connection direction 78a.Preferably, the swing axis 166a of the locking element 150a has a minimum distance 168a of at least 3 cm, preferably at least 4 cm and more preferably at least 5.5 cm from the locking element 150a, especially along the swing arm 152a.

[0060] The coupling elements 87a, 88a, 89a, and 90a of the coupling unit 80a, especially coupling element 87a, another coupling element 88a, another coupling element 89a, and / or another additional coupling element 90a, are each individually constructed as plate components and are configured to engage with each other, at least in a form-locking manner, for transmitting driving force in the coupled state of the coupling unit 80a, especially in engagement with the corresponding other coupling elements 87a, 88a, 89a, and 90a of the coupling unit 80a. Figure 3 The diagram shows the connection portion of the connecting device 66a in the coupled state of the connecting unit 80a, wherein another coupling element 88a and another coupling element 89a are at least form-locked to each other for connecting another first connector 70a and a second connector 72a. The coupling elements 87a, 88a, 89a, 90a of the coupling unit 80a, especially coupling element 87a, another coupling element 88a, another coupling element 89a and / or another other coupling element 90a, each have at least one form-locking protrusion 170a, 172a and at least one form-locking recess 174a, 176a. Preferably, coupling elements 87a, 88a, 89a, and 90a are configured to engage in the coupled state with the shape-locking protrusions 170a and 172a of the respective coupling elements 87a, 88a, 89a, and 90a into the shape-locking recesses 174a and 176a of the other coupling elements 87a, 88a, 89a, and 90a, respectively. Figure 3 The coupling state of coupling unit 80a is shown, wherein another coupling element 88a is engaged to the shape-locking recess 176a of another coupling element 89a through the shape-locking protrusion 170a of the other coupling element 88a, and wherein the other coupling element 89a is engaged to the shape-locking recess 174a of the other coupling element 88a through the shape-locking protrusion 172a of the other coupling element 89a.

[0061] The coupling elements 87a, 88a, 89a, and 90a of the coupling unit 80a, especially coupling element 87a, another coupling element 88a, another coupling element 89a, and another additional coupling element 90a, are elastically constructed at least in the coupling region 178a of the coupling unit 80a against at least one motion spring transverse to the connection direction 78a, wherein the unloaded state of coupling elements 87a, 88a, 89a, and 90a corresponds to the basic position of the respective coupling elements 87a, 88a, 89a, and 90a in the coupling state. The coupling elements 87a, 88a, 89a, and 90a are particularly capable of elastically oscillating within the coupling region 178a of the coupling unit 80a about an oscillation axis 159a oriented at least substantially perpendicular to the connection direction, in order to transition to a coupled or decoupled state. This oscillation axis is particularly arranged in the vicinity of the connectors 78a, 70a, 72a, and 74a, which include the respective coupling elements 87a, 88a, 89a, and 90a. Preferably, the connectors 78a, 70a, 72a, and 74a of the connecting device 66a are particularly... Figures 3 to 5The additional first connector 70a and second connector 72a shown in the diagram each include a support element 180a configured to hold the coupling elements 87a, 88a, 89a, and 90a in place to prevent movement laterally to the connection direction 78a. The support element 180a is disposed within the base of the connectors 78a, 70a, 72a, and 74a, respectively. The support element 180a is constructed as a reduction in the base of the connectors 78a, 70a, 72a, and 74a, wherein the coupling elements 87a, 88a, 89a, and 90a, respectively disposed on the connectors 78a, 70a, 72a, and 74a, extend through the reduction. The bases of the connectors 78a, 70a, 72a, and 74a are respectively constructed at least substantially cylindrically and / or have a basic shape at least substantially hollow cylindrical. The additional first connector 70a is preferably fixed to the base of the extension or adapter 16a by form-locking and / or force-locking. Alternatively, the first connectors 68a, 70a may be constructed as a single piece with the extension or adapter 16a or with the machine tool 12a. Preferably, the coupling elements 87a, 88a, 89a, 90a are respectively movable relative to the support element 180a in a direction parallel to the connection direction 78a, particularly at least substantially without resistance. Preferably, the coupling elements 87a, 88a, 89a, 90a, especially another coupling element 88a and another coupling element 89a, are held by the support element 180a, especially the support element 180a of the other first connector 70a or the support element 180a of the second connector 72a, such that the end regions 182a, 184a of the coupling elements 87a, 88a, 89a, 90a, especially facing the coupling region 178a, can elastically swing laterally to the connection direction 78a. In particular, coupling elements 87a, 88a, 89a, and 90a each have a swing axis 159a, which is arranged along the connection direction 78a in a region of one of the support elements 180a. The swing axes 159a of coupling elements 87a, 88a, 89a, and 90a are oriented at least substantially parallel to the main extension plane 186a of each coupling element 87a, 88a, 89a, and 90a, and preferably at least substantially perpendicular to the main extension axis 188a of each coupling element 87a, 88a, 89a, and 90a. Preferably, the swing axes 159a of coupling elements 87a, 88a, 89a, and 90a extend at least substantially perpendicular to the connection direction 78a and the thickness 190a of each coupling element 87a, 88a, 89a, and 90a, said thickness extending particularly at least substantially perpendicular to the connection direction 78a.Preferably, the swing axes 159a of the coupling elements 87a, 88a, 89a, and 90a and / or the support elements 180a of the connectors 68a, 70a, 72a, and 74a, respectively, along the longitudinal axes 154a of the corresponding connectors 68a, 70a, 72a, and 74a, have a minimum distance 192a of at least 8 cm, preferably at least 10 cm, and preferably at least 15 cm between them and the ends of the corresponding connectors 68a, 70a, 72a, and 74a constructed along the longitudinal axis 154a. Preferably, the swing axes 159a of the additional coupling element 89a and / or the support elements 180a of the second connector 72a are arranged from the end of the second connector 72a and / or the coupling region 178a along the longitudinal axis 154a of the second connector 72a behind the locking element 150a and / or behind the operating element 158a of the fixing unit 76a.

[0062] The fixing unit 76a includes an actuating element 158a configured to release the fixing unit 76a. The actuating element 158a of the fixing unit 76a is integrally constructed with the locking element 150a and the swing arm 152a. Preferably, the actuating element 158a of the fixing unit 76a is configured to move the locking element 150a and the swing arm 152a laterally to the connection direction 78a during actuation, particularly towards the longitudinal axis 154a of the second connector 72a. The base of the second connector 72a defines a recess 194a, within which the actuating element 158a of the fixing unit 76a is guided for actuation. Preferably, the base of the second connector 72a defines at least one additional recess 196a, within which the locking element 150a is guided, particularly by the swing arm 152a, during movement laterally to the connection direction 78a. Particularly preferably, the additional recess 196a is arranged at least substantially at the height of the mating fixing element 160a when the first connector 70a and the second connector 72a are fully pushed into each other along the longitudinal axis 154a of the connectors 70a and 72a. Preferably, the locking element 150a is engaged with the mating fixing element 160a by the additional recess 196a defined by the base of the second connector 72a in the fixed state of the fixing unit 76a. Preferably, the actuating element 158a of the fixing unit 76a is configured for actuation by a force acting in a direction radially oriented relative to the longitudinal axis 154a of the second connector 72a, said force extending particularly at least substantially perpendicular to the connection direction 78a.

[0063] The first connector 68a at least partially constitutes another handle unit 28a of the operating device 20a of the machine tool 12a (see also...). Figure 1 and 2The actuating element 160a is preferably configured as part of the second connector 72a and / or another second connector 74a. Preferably, one or more actuating elements 158a, in particular at least substantially independent of the state of the fixing unit 76a, are arranged spaced apart from the first connector 68a along the longitudinal axis 154a of the second connector 72a and / or another second connector 74a when the second connector 72a and / or another second connector 74a are arranged on the first connector 68a.

[0064] Preferably, the connectors 68a, 70a, 72a, and 74a can be connected to each other regardless of the position of the machining tool 46a, the motor 52a, and / or the force transmission device 54a, and consequently the coupling elements 87a, 88a, 89a, and 90a along the connection direction 78a, and in particular, can be fixed to each other by the fixing unit 72a. For example, it is conceivable that the connectors 68a, 70a, 72a, and 74a are connected to each other, particularly fixed to each other by the fixing unit 72a, while the connection unit 80a does not simultaneously transition to the coupling state, for example, by arranging the two coupling elements 87a, 88a, 89a, and 90a spaced apart from each other along an axis oriented parallel to the connection direction 78a. Preferably, after the connecting members 68a, 70a, 72a, and 74a are fixed by the fixing unit 72a, the coupling elements 87a, 88a, 89a, and 90a move towards each other along an axis oriented parallel to the connection direction 78a due to the movement of coupling elements 87a and 88a via the drive unit 32a and / or due to the movement of additional coupling elements 89a and 90a via the machining tool 46a. Preferably, the coupling elements 87a, 88a, 89a, and 90a are configured to move towards each other via guide surfaces 202a and 204a (see [link to guide surface]) during their movement along an axis oriented parallel to the connection direction 78a. Figure 6 They at least automatically transition to a coupled state, especially when they are engaged with each other.

[0065] It is conceivable that coupling unit 80a and / or fixing unit 76a include at least one locking element 198a, which is configured to at least substantially prevent fixing unit 76a from loosening and / or prevent coupling unit 80a from transitioning to a decoupled state, depending on the position of coupling elements 87a, 88a, 89a, 90a relative to locking element 198a of coupling unit 80a. The locking element is in... Figure 3 The locking element 198a is exemplarily shown as a shape-locking element that couples the locking element 150a to the coupling elements 88a and 89a along an axis oriented parallel to the connection direction 78a via the mobility of the swing arm 152a. However, other configurations of the locking element 198a are also contemplated, such as as a purely force-locking element or the like.

[0066] exist Figure 4The diagram illustrates a connecting device 66a, particularly the connecting portion, when connectors 70a and 72a, especially the first connector 70a (hereinafter referred to as the first connector), and the second connector 72a are pushed into each other. The second connector 72a is configured to be at least partially pushed into the base of the first connector 70a, particularly the first connector 70a, by movement along the connecting direction 78a. In particular, the locking element 150a is configured to move transversely to the connecting direction 78a toward the longitudinal axis 154a of the second connector 72a by acting in conjunction with the base of the first connector 70a when they are pushed into each other. Preferably, when connectors 70a and 72a are pushed into each other, the operating element 158a of the fixing unit 76a does not need to be operated by the user to transition to the fixed state of the fixing unit 76a. The movement of the locking element 150a causes the additional coupling element 89a to be manipulated by the actuating protrusion 156a and to move laterally to the connection direction 78a, particularly elastically deforming / moving about the swing axis 159a of the additional coupling element 89a. After the second connector 72a is fully pushed in, preferably until it interacts with the stop formed by the first connector 70a, the additional recess 196a of the second connector 72a and the mating fixing element 160a overlap each other when viewed perpendicularly to the connection direction 78a, wherein the locking element 150a acts on the mating fixing element 160a through the additional recess 196a. In particular, the locking element 150a is configured to move at least partially into the recess defined by the mating fixing element 160a in the fixed state of the fixing unit 76a. In particular, the locking element 150a is configured to interact with the inner surface of at least one of the recesses defining the mating fixing element 160a in a form-locking manner in the fixed state of the fixing unit 76a. The additional coupling element 89a is configured to elastically return to its basic position when the locking element 150a moves laterally to the connecting direction 78a onto the mating fixing element 160a, in which the additional coupling element 89a is oriented parallel to the longitudinal axis 154a of the second connector 72a, wherein, preferably, the actuating protrusion 156a also moves laterally to the connecting direction 78a away from the additional coupling element 89a and / or away from the center of the base of the second connector 72a. Preferably, the additional coupling element 89a is configured to engage with another coupling element 87a, 88a, particularly with coupling element 87a, especially by means of the shape-locking protrusion 172a of the additional coupling element 89a, or as in Figure 4 As shown, it engages with another coupling element 88a, wherein, in particular, the shape-locking protrusion 172a of the other coupling element 89a moves at least partially into the shape-locking recess 174a of the other coupling element 88a.

[0067] exist Figure 5The diagram illustrates the connecting device 66a, particularly the connecting portion, when the connectors 70a, 72a, especially the additional first connector 70a (hereinafter referred to as the first connector) and the second connector 72a are separated. The actuating element 158a of the fixing unit 76a is configured to be actuated for releasing the fixing unit 76a and for transitioning the coupling unit 80a from a coupled state to a decoupled state, wherein the locking element 150a is separated from the mating fixing element 160a by a swing arm 152a transversely to the connecting direction 78a toward the longitudinal axis 154a of the second connector 72a. Preferably, the second connector 72a, in the actuated state of the actuating element 158a (wherein, in particular, the locking element 150a moves completely out of the recess defined by the mating fixing element 160a), can be separated from the first connector 70a, preferably along a direction 200a oriented at least substantially parallel to the connecting direction 78a and pointing opposite to the connecting direction 78a. Preferably, the actuating element 158a of the fixing unit 76a is configured to actuate an additional coupling element 89a, preferably by means of an actuating protrusion 156a, when actuating and / or moving the locking element 150a and / or the swing arm 152a, wherein the additional coupling element 89a moves about the swing axis 159a transversely to the connection direction 78a. The additional coupling element 89a is configured to disengage from the other coupling element 88a by movement about the swing axis 159a transversely to the connection direction 78a when actuated by the actuating element 158a of the fixing unit 76a, particularly by means of the actuating protrusion 156a, when the coupling unit 80a transitions to the decoupled state and / or the additional coupling element 89a moves in a direction 200a oriented at least substantially parallel to the connection direction 78a and opposite to the connection direction 78a, particularly moving out of the first connector 70a. If the actuating element 158a of the fixed unit 76a is no longer manipulated, the locking element 150a will automatically and elastically return to its basic position via the swing arm 152a and the additional coupling element 89a. Preferably, the transition of the coupling unit 80a from the decoupled state to the coupled state and from the coupled state to the decoupled state is similar to the above-described connection configuration between another connection point, preferably between the coupling element 87a and another coupling element 89a or another additional coupling element 90a, for the connection between another coupling element 88a and another coupling element 89a.

[0068] exist Figures 3 to 5The diagram shows two connectors 70a and 72a arranged on the extension or adapter 16a or on the tool attachment 14a. The additional first connector 70a has a base configured as a receiving sleeve, which is fixed to the base of the extension or adapter 16a. The second connector 16a has a base configured as a push-in member, which is fixed to or in the tubular end portion of the tool attachment 14a. Preferably, the second connector 72a is configured to be pushed into the additional first connector 70a together with the tubular end portion of the tool attachment 14a for fixing to the additional first connector 70a and for transitioning to the coupling state of the coupling elements 88a and 89a. Alternatively, other configurations of connectors 68a, 70a, 72a, and 74a may be considered, such as a one-piece configuration of each connector 68a, 70a, 72a, and 74a with the basic unit 22a of the machine tool 12a, with the base of the extension or adapter 16a, and / or with the end component of the tool accessory 14a.

[0069] exist Figure 6 The diagram shows schematic side views of two coupling elements 87a, 88a, 89a, 90a coupled to each other, particularly coupling element 87a and another coupling element 89a, coupling element 87a and another additional coupling element 90a, and / or another coupling element 88a and another coupling element 89a. In particular, coupling element 87a and the other coupling element 88a are constructed at least substantially identically. Preferably, the other coupling element 89a and the other additional coupling element 90a are constructed at least substantially identically. Figure 6The coupling state of coupling unit 80a is shown, wherein coupling elements 87a, 88a and other coupling elements 89a, 90a are form-locked together. Coupling elements 87a, 88a, especially coupling element 87a and another coupling element 88a and another coupling element 89a, 90a, especially another coupling element 89a and another another coupling element 90a, each form at least one guide surface 202a, which is oriented inclined to the connection direction 78a and configured to at least automatically convert the other coupling elements 89a, 90a or coupling elements 87a, 88a into a coupled state, especially by the relative oscillation of coupling elements 87a, 88a, 89a, 90a about an axis at least substantially perpendicular to the connection direction 78a, when the two coupling elements 87a, 88a, 89a, 90a move toward each other at least substantially parallel to the connection direction 78a, particularly by the relative oscillation of coupling elements 87a, 88a, 89a, 90a about an axis at least substantially perpendicular to the connection direction 78a. Coupler elements 87a, 88a, especially coupler 87a and another coupler 88a, each form an additional guide surface 204a, which is arranged on the end 206a of the respective coupler elements 87a, 88a constructed along the main extension axis 188a of the respective coupler elements 87a, 88a. Guide surfaces 202a are respectively arranged on the shape-locking protrusions 170a, 172a of the coupler elements 87a, 88a, 89a, 90a, especially on the outer side of the shape-locking protrusions 170a, 172a, which face the end 206a, 208a constructed along the main extension axis 188a of the respective coupler elements 87a, 88a, 89a, 90a. The additional guide surface 204a is arranged along the main extension axis 188a of the coupling elements 87a and 88a between the end portion 206a of the coupling elements 87a and 88a constructed along the main extension axis 188a and the shape-locking protrusion 170a of the coupling elements 87a and 88a. This additional guide surface 204a specifically limits the end portion 206a of the coupling elements 87a and 88a constructed along the main extension axis 188a. Figure 6In the configuration of coupling elements 87a and 88a shown, the guide surfaces 202a and additional guide surfaces 204a of coupling elements 87a and 88a are arranged separately from each other by surface segments extending at least substantially parallel to the connection direction 78a. Alternatively, the guide surfaces 202a and additional guide surfaces 204a of coupling elements 87a and 88a can be constructed as a single piece and / or transitioned flush with each other. The regions of coupling elements 87a and 88a constituting the additional guide surfaces 204a are preferably formed by bending. The shape-locking protrusions 170a and 172a of coupling elements 87a, 88a, 89a, and 90a of connecting unit 80a are formed by bending and / or pressing out the material of coupling elements 87a, 88a, 89a, and 90a, which are constructed as sheet metal components. The shape-locking recesses 174a and 176a of the coupling elements 87a, 88a, 89a, and 90a of the connecting unit 80a are formed by punching, cutting, and / or pressing out the material of the coupling elements 87a, 88a, 89a, and 90a, which are constructed as sheet metal components. The guide surface 202a and the additional guide surface 204a are respectively oriented inclined to the connection direction 78a and inclined to a plane or axis perpendicular to the connection direction 78a. Preferably, the guide surface 202a and the additional guide surface 204a are respectively constructed to be at least mostly planar. In particular, the guide surface 202a and the additional guide surface 204a are rounded at the edge regions constructed along the connection direction 78a of the guide surface 202a and / or the additional guide surface 204a, wherein the guide surface 202a and / or the additional guide surface 204a continuously transition into at least one outer surface of the coupling elements 87a, 88a, 89a, 90a oriented at least substantially parallel to the connection direction 78a, on which the corresponding guide surface 202a and / or the corresponding additional guide surface 204a is arranged. Preferably, the normal vectors of the guide surfaces 202a and 204a arranged on the coupling elements 87a, 88a, 89a, 90a develop with the axis oriented at least substantially parallel to the connection direction 78a into a guide angle 212a of at least 5°, preferably at least 10° and preferably at least 15° and / or at most 60°, preferably at most 45° and preferably at most 35°. In particular, guide surface 202a and another guide surface 204a are configured to at least substantially automatically convert coupling unit 80a into a coupled state when coupling elements 87a, 88a and other coupling elements 89a, 90a move toward each other parallel to connection direction 78a, especially independent of manipulation by fixed unit 76a.Preferably, the guide surface 202a and the additional guide surface 204a are configured to tilt, in particular transverse to, the coupling elements 87a, 88a and the additional coupling elements 89a, 90a relative to each other when they move toward each other parallel to the connection direction 78a, wherein, in particular, the coupling elements 87a, 88a and the additional coupling elements 89a, 90a are subjected to forces on each other through the guide surfaces 202a, 204a. Alternatively, it can be considered that only one coupling element 87a, 88a, 89a, 90a of coupling unit 80a, especially coupling element 87a, 88a or other coupling elements 89a, 90a, can move laterally to the connection direction 78a, wherein, when these coupling elements 87a, 88a, 89a, 90a move towards each other parallel to the connection direction 78a, the corresponding other coupling element 87a, 88a, 89a, 90a moves laterally to the connection direction 78a along the coupling elements 87a, 88a, 89a, 90a via guide surfaces (multiple) 202a, 204a.

[0070] The coupling unit 80a has a straight coupling direction 214a oriented perpendicular to the connection direction 78a, wherein coupling elements 87a and 88a are configured to engage with other coupling elements 89a and 90a along the coupling direction 214a. In particular, the other coupling elements 89a and 90a are configured to move in a direction opposite to the coupling direction 214a in order to release from coupling elements 87a and 88a and / or when connectors 68a, 70a, 72a, and 74a are pushed into each other (see [link to relevant documentation]). Figures 3 to 5 Coupler element 87a and another coupling element 88a respectively form a shape-locking protrusion 170a and a pushing protrusion 216a, wherein the shape-locking protrusion 170a is configured to transmit driving force to one of the other coupling elements 89a, 90a in a pulling direction oriented at least substantially parallel to the connection direction 78a, and wherein the pushing protrusion 216a is configured to transmit driving force to one of the other coupling elements 89a, 90a in a pushing direction oriented at least substantially parallel to the connection direction 78a and pointing opposite to the pulling direction. The shape-locking protrusion 170a and the pushing protrusion 216a are viewed particularly along the main extension plane 186a of the coupling elements 87a, 88a (see...). Figure 6 The coupling elements 87a and 88a extend from their main extension plane 186a along the coupling direction 214a. In particular, the shape-locking protrusions 172a of the other coupling elements 89a and 90a are observed especially along the main extension plane 186a of the other coupling elements 89a and 90a (see [link]). Figure 6 It extends from the main extension plane 186a of the other coupling elements 89a and 90a in a direction opposite to the coupling direction 214a.

[0071] The coupling elements 87a and 88a of the coupling unit 80a, especially coupling element 87a and another coupling element 88a, each constitute at least one force transmission surface 218a, wherein the coupling direction 214a forms an angle 224a with the normal of at least one surface of the force transmission surface 218a that is greater than 90°, preferably greater than 90°, and preferably at least substantially 100°. Preferably, the additional coupling elements 89a and 90a each constitute at least one force transmission surface 220a, wherein the coupling direction 214a forms an angle 226a with the normal of at least one surface of the force transmission surface 220a of the additional coupling elements 89a and 90a that is less than 85°, and preferably at least substantially 80°. Preferably, the angle between the coupling direction 214a and the main extension plane of the pushing protrusion is greater than 0°, preferably greater than 3°, and preferably at least 5°. Preferably, the force-transmitting surfaces 218a and 220a of the coupling elements 87a, 88a and the additional coupling elements 89a, 90a are arranged and / or configured such that these force-transmitting surfaces are at least partially abutted against each other by form-locking to resist movement of the coupling elements 87a, 88a against the coupling direction 214a and / or to resist movement of the additional coupling elements 89a, 90a along the coupling direction 214a. Preferably, the coupling element 87a and the other coupling element 88a each constitute additional force-transmitting surfaces 228a, which are configured for force transmission in the pushing direction from the respective coupling elements 87a, 88a to one of the additional coupling elements 89a, 89a. The additional force-transmitting surface 228a is arranged on the pushing protrusion 216a. The additional force-transmitting surface 228a is arranged on the inner side of the pushing protrusion 216a, which limits the form-locking recesses 174a of the coupling elements 87a, 88a. The additional force-transmitting surface 228a has a surface normal, which, when viewed in relation to the coupling direction 214a, particularly along the main extension plane 186a of the coupling elements 87a and 88a (see...). Figure 6 An angle 230a is formed at a rate greater than 90°, preferably at least 95°, and especially at least substantially 95°. The additional force transmission surface 228a and the main extension plane 186a of the coupling elements 87a and 88a are viewed particularly along the main extension plane 186a of the coupling elements 87a and 88a (see...). Figure 6 The angle is less than 90°, preferably at most 85° and especially at least substantially 85°.

[0072] Preferably, the pushing protrusion 216a is at least partially, particularly on one side of the shape-locking recess 174a of the coupling elements 87a, 88a, which is limited by the shape-locking protrusion 170a and / or by the force transmission surface 218a of the coupling elements 87a, 88a. Preferably, the pushing protrusion 216a is bent out from the material of the coupling elements 87a, 88a, which are constructed as sheet metal components, preferably in a direction perpendicular to the orientation of the main extension plane 186a of the coupling elements 87a, 88a, which corresponds to the extension direction of the shape-locking protrusion 170a of the coupling elements 87a, 88a. Preferably, the shape-locking protrusion 170a of the coupling elements 87a, 88a is bent out from the material of the coupling elements 87a, 88a and / or extruded along this extension direction. The shape-locking protrusion 170a, shape-locking recess 174a, and pushing protrusion 216a of the coupling elements 87a and 88a are arranged in the end region 182a of the coupling elements 87a and 88a, which preferably forms a tab through the shape-locking recess 174a. Preferably, the end region 182a of the coupling elements 87a and 88a includes the end portion 206a of the coupling elements 87a and 88a constructed along the main extension axis 188a of the coupling elements 87a and 88a. The pushing protrusion 216a is arranged behind the shape-locking recess 174a of the coupling elements 87a and 88a along the main extension axis 188a of the coupling elements 87a and 88a when viewed from the end portion 206a of the coupling elements 87a and 88a. The shape-locking protrusions 170a of the coupling elements 87a and 88a, viewed from the end 206a of the coupling elements 87a and 88a, are arranged in front of the shape-locking recesses 174a along the main extension axis 188a of the coupling elements 87a and 88a. Specifically, the force transmission surface 218a of the shape-locking protrusions 170a of the coupling elements 87a and 88a is constructed on the side of the shape-locking protrusions 170a opposite to the end 206a. Preferably, additional shape-locking protrusions 172a and / or shape-locking recesses 176a of the coupling elements 89a and 90a are arranged in the end regions 184a of the additional coupling elements 89a and 90a. The end regions 184a of the additional coupling elements 89a and 90a define the ends 208a of the additional coupling elements 89a and 90a along the main extension axis 188a of the additional coupling elements 89a and 90a. Preferably, viewed from the end 208a of the other coupling elements 89a and 90a, the shape-locking protrusion 172a of the other coupling elements 89a and 90a is arranged in front of the shape-locking recess 176a of the other coupling elements 89a and 90a along the main extension axis 188a of the other coupling elements 89a and 90a.The minimum spacing 232a between the end 208a of the other coupling elements 89a, 90a and the shape-locking recess 176a and / or force transmission surface 220a of the other coupling elements 89a, 90a, oriented at least substantially parallel to the connection direction 78a and / or the main extension axis 188a of the other coupling elements 87a, 88a, is less than the minimum spacing 234a between the shape-locking recess 174a and / or the force transmission surface 218a of the coupling elements 87a, 88a and the pushing protrusion 216a, oriented at least substantially parallel to the connection direction 78a and / or the main extension axis 188a of the coupling elements 87a, 88a, oriented in particular corresponding to the maximum longitudinal extension of the shape-locking recess 174a of the coupling elements 87a, 88a. Particularly preferably, the difference between the minimum distance 234a between the shape-locking recess 174a and / or the force transmission surface 218a of the coupling elements 87a and 88a and the minimum distance 232a between the end 208a of the other coupling elements 89a and 90a and the shape-locking recess 176a and / or the force transmission surface 220a of the other coupling elements 89a and 90a is at least 1 mm, preferably at least 2 mm, and can also be considered as at least 3 mm.

[0073] The maximum extension of the protrusions 164a of coupling elements 88a and 89a along axes oriented at least substantially parallel to the connection direction 78a is greater than the maximum extension along axes oriented at least substantially perpendicular to the connection direction 78a and / or along axes oriented at least substantially parallel to the coupling direction 214a. In particular, the protrusions 164a of coupling elements 88a and 89a differ from protrusions formed by bending from sheet metal, particularly the material of coupling elements 88a and 89a, for example, from the configuration of the push-out protrusion 216a shown in the figures.

[0074] It is conceivable that the drive unit 32a is configured to keep the machining tools 46a, 48a in the open state when not in use, wherein, preferably, the coupling elements 87a, 88a, 89a, 90 are arranged in an unloaded state. This allows for advantageously simple separation of the coupling elements 87a, 88a, 89a, 90a, especially because force is advantageously minimally applied to the force transmission surfaces 202a, 204a. Alternatively, it is conceivable that the drive unit 32a is configured to keep the machining tools 46a, 48a in the closed state when not in use for reliable storage of the machine tool system 10a. It is conceivable that the drive unit 32a is configured to briefly drive the coupling element 87a with a restoring force after the machining tool 46a has moved into the closed state of the machining tools 46a, 48a when not in use, the restoring force being particularly opposite to the closing of the machining tools 46a, 48a, but preferably not causing a return to the open state. As a result, the stress between the coupling elements 87a, 88a, 89a, and 90a can be advantageously reduced, and thus the coupling elements 87a, 88a, 89a, and 90a can be advantageously and easily separated from each other, in a manner similar to the process described above for separating the coupling elements 87a, 88a, 89a, and 90a.

[0075] exist Figure 7 It shows Figure 6 A perspective view of the coupling region 178a of the coupling unit 80a shown in the figure. Figure 7The coupling elements 87a, 88a, 89a, and 90a of the coupling unit 80a shown are depicted in a coupled state. The push-out protrusion 216a has a maximum lateral extension 236a, which is at least substantially perpendicular to the connection direction 78a and / or the main extension axis 188a of the coupling elements 87a and 88a. This maximum lateral extension corresponds at least substantially to the maximum lateral extension of the shape-locking recess 174a of the coupling elements 87a and 88a on one side of the shape-locking recess 174a of the coupling elements 87a and 88a, which is limited by the push-out protrusion 216a. On the sides of the shape-locking recesses 174a and 176a of the coupling elements 87a, 88a, and the other coupling elements 89a, 90a facing the shape-locking protrusions 170a and 172a, the coupling elements 87a, 88a, and the other coupling elements 89a, 90a respectively define circular recesses 238a, which are respectively constructed as part of one of the shape-locking recesses 174a and 176a. The recesses 238a of the coupling elements 87a, 88a, 89a, 90a are preferably configured to advantageously distribute the stress load acting on the respective coupling elements 87a, 88a, 89a, 90a. Through the recesses 238a of the coupling elements 87a, 88a, 89a, 90a, it is advantageous to prevent undesirable tearing of the material of the coupling elements 87a, 88a, 89a, 90a in the region of the shape-locking recesses 174a and 176a. Preferably, the recesses 238a of the coupling elements 87a, 88a, 89a, and 90a extend perpendicularly to the main extension axis 188a of the respective coupling elements 87a, 88a, 89a, and 90a, adjacent to the shape-locking protrusions 170a and 172a. In particular, the recesses 238a of the coupling elements 87a and 88a extend over the entire thickness of the material of the coupling elements 87a and 88a and / or the additional coupling elements 89a and 90a.

[0076] The shape-locking protrusions 170a and 172a of the coupling elements 87a, 88a and / or the other coupling elements 89a, 90a, respectively, when viewed perpendicularly to the main extension plane 186a of the coupling elements 87a, 88a and / or the other coupling elements 89a, 90a, have a parabolic basic shape, which transitions in particular to the corresponding shape-locking recesses 174a, 176a via the edges of an imaginary parabola. In particular, the guide surfaces 202a and 204a, when viewed perpendicularly to the main extension plane 186a of the coupling elements 87a, 88a and / or the other coupling elements 89a, 90a, respectively, extend from the vertex of the imaginary parabola of the parabolic basic shape of the corresponding shape-locking protrusions 170a, 172a to the corresponding shape-locking recesses 174a, 176a. Preferably, the force transmission surfaces 218a, 220a of the coupling elements 87a, 88a and the additional force transmission surfaces 228a of the coupling elements 87a, 88a, particularly arranged on the pushing protrusion 216a, are at least substantially planar. However, other configurations of the shape-locking protrusions 170a, 172a and / or the shape-locking recesses 174a, 176a are also contemplated.

[0077] Consider that the push-out protrusion 216a has at least one outer contour extending at least substantially perpendicular to the connection direction 78a, said outer contour being constructed correspondingly to the outer contours of the shape-locking protrusions 170a and 172a of the other coupling elements 89a and 90a (see...). Figure 9 ).

[0078] exist Figure 8 The diagram shows the state in which they are separated from each other. Figures 3 to 5 The other first connector 70a (hereinafter referred to as the first connector) shown in the figure and in Figures 3 to 5The figure shows a perspective view of the second connector 72a. Connectors 70a and 72a are arranged coaxially with each other, and preferably, connectors 70a and 72a are connectable to each other by movement of the second connector 72a along the connection direction 78a. The connecting device 66a, particularly the fixing unit 76a, includes a guide unit 240a configured to guide the first connector 70a and the second connector 72a relative to each other when pushed into each other. Preferably, the guide unit 240a is configured to pre-determine the orientation of the first connector 70a and the second connector 72a relative to each other for pushing the first connector 70a and the second connector 72a into each other, particularly about an axis at least substantially parallel to the connection direction 78a. The guide unit 240a includes a guide element 242a, which is constructed as a protrusion and arranged on the second connector 72a. The guide unit 240a includes a receiving portion 244a, which is preferably defined by the first connector 70a. Preferably, at least one receiving portion 244a of the guiding unit 240a is configured to receive the guiding element 242a when the first connector 70a and the second connector 72a are pushed into each other, and preferably guides along an axis oriented parallel to the connection direction 78a along the longitudinal extension of the receiving portion 244a of the guiding unit 240a. Particularly preferably, the guiding unit 240a is configured such that the connecting device 66a has exactly one possible orientation of the first connector 70a and the second connector 72a for pushing the first connector 70a and the second connector 72a into each other (this orientation is particularly... Figure 8 (as shown in the diagram) so that they have axes oriented at least substantially parallel to the connection direction 78a relative to each other. The guide element 242a is constructed in one piece with the base of the second connector 72a, especially the second connector 72a. The receiving portion 244a is defined by the base of the first connector 70a, especially the first connector 70a. Other configurations of the guide unit 240a are also conceivable, such as having a separately constructed guide element 242a and / or having more than one receiving portion 244a. Preferably, the number of receiving portions 244a of the guide unit 240a corresponds at least to the number of guide elements 242a. It is also conceivable that, preferably, if the guide unit 240a can realize multiple possible orientations of the first connector 70a and the second connector 72a relative to each other for pushing into each other, the connecting device 66a, especially the fixing unit 76a, has more receiving portions 244a of the guide unit 240a than the number of guide elements 242a.

[0079] Preferably, the connecting device 66a of the machine tool system 10a includes different guide units 240a, each guide unit including guide elements 242a of different constructions. Preferably, the guide element 242a is arranged on a second connector 72a. Preferably, at least one additional guide element of the other guide unit of the connecting device 66a, particularly of a different construction from the guide element 242a, is arranged on another second connector 74a. In particular, the guide unit 240a of the connecting device 66a includes a receiving portion 244a of different construction for receiving the guide element 242a when the connectors 68a, 70a, 72a, 74a are pushed into each other. Preferably, the receiving portion 244a of the guide unit 240a is arranged on another first connector 70a. Preferably, at least one additional receiving portion of the other guide unit is arranged on the first connector 68a. Preferably, the additional receiving portion is arranged on the machine tool 12a via the first connector 68a and configured to receive one of the two differently constructed guide elements 242a. Preferably, the receiving portion 244a of the guide unit 240a is arranged on the extension or adapter 16a via an additional first connector 70a and is configured to receive, in particular, the guide element 242a arranged on the tool attachment 14a. Specifically, the two guide elements 242a, especially the guide element 242a and the additional guide element, have different cross-sections and / or lateral extensions 246a (in... Figure 8 (Exemplary example shown for guide element 242a). Particularly preferably, guide element 242a has a smaller cross-sectional area and / or lateral extension 246a than other guide elements. Preferably, other guide elements have a larger cross-sectional area and / or lateral extension than the receiving portion 244a of guide unit 240a. Preferably, guide unit 240a, especially guide element 242a and receiving portion 244a, are configured such that other extensions or adapters, especially those constructed at least substantially the same as those of extensions or adapters 16a, cannot be arranged between extension or adapter 16a and tool accessory 14a or between machine tool 12a and extension or adapter 16a via connecting device 66a.

[0080] exist Figure 9 Another embodiment of the invention is illustrated below. The following description and drawings are essentially limited to the differences between the embodiments, wherein reference can also be made in principle to other previous embodiments, especially those with the same reference numerals, with regard to components that are likely represented, particularly those having the same reference numerals. Figures 1 to 8 The accompanying drawings and / or description. To distinguish these embodiments, the letter 'a' is placed in... Figures 1 to 8 The accompanying drawings, following the reference numerals of the embodiments, are shown below. Figure 9 In one embodiment, the letter 'a' is replaced by the letter 'b'.

[0081] exist Figure 9An alternative configuration of the coupling element 87b of the coupling unit 30b for the connection device 66b for machine tool 12b and / or for machine tool system 10b is shown. The connection device 66b includes at least one first connector 68b and at least one second connector 74b, the first connector being configured in particular as part of the basic unit 22b of machine tool 12b or as part of an extension or adapter 16b, and the second connector being configured in particular as part of an extension or adapter 16b for machine tool 12b or as part of a tool accessory. The connection device 66b includes a fixing unit and a coupling unit 80b, the fixing unit being configured to fix the second connector 74b to the first connector 68b by movement along at least a substantially straight connection direction 78b, and the coupling unit being configured, at least in the coupled state, to transmit driving force at least substantially parallel to the connection direction 78b from the first connector 68b, in particular the coupling element 87b of the coupling unit 80b, to the second connector 74b, in particular the additional coupling element of the coupling unit 80b (in... Figure 9 (Not shown in the image), this additional coupling element is configured as part of the second connector 74b. Figure 9 The connecting device 66b shown in at least part of the diagram has a connection with the connection in the diagram. Figures 1 to 8 The connecting device 66a described in the description has at least a substantially similar configuration, thus relating to the connection device 66a described in the description. Figure 9 The configuration of the connecting device 66b shown can at least substantially refer to the configuration of the connecting device 66b shown. Figures 1 to 8 The description. (And in the appendix) Figures 1 to 8 The connecting device 66a described in the description is different from that in the appendix. Figure 9 The coupling element 67b of the connecting device 66b shown preferably constitutes a push-protrusion 216b, which is configured to push another coupling element along a push direction at least substantially parallel to the connection direction 78b for transmitting driving force in the coupled state of the coupling unit 80b. The push-protrusion 216b has at least one outer contour 248b extending at least substantially perpendicular to the connection direction 78b, which is constructed corresponding to the outer contour of the shape-locking protrusion of the other coupling element. The outer contour 248b of the push-protrusion 216b and the outer contour of the shape-locking protrusion of the other coupling element (in...) Figure 9(Not shown) Constructed circularly, preferably partially arcuately. Preferably, the push-out protrusion 216b has an outer contour 248b along its entire extension along the main extension axis 188b of the coupling element 67b, wherein, in particular, the outer surface 250b of the push-out protrusion 216b extends at least substantially parallel to the main extension axis 188b of the coupling element 67b, and this outer surface defines the outer contour 248b of the push-out protrusion 216b. Preferably, in a cross-sectional plane of another coupling element arranged perpendicular to the main extension plane 186b of the other coupling element and / or including the main extension axis 188b of the other coupling element, the shape-locking protrusion of the other coupling element has a curved basic shape on one side of the outer contour constituting the shape-locking protrusion of the other coupling element, which in particular includes the guide surface of the other coupling element. Preferably, the outer contour of the shape-locking protrusion of the additional coupling element defines an inner side of the shape-locking protrusion of the additional coupling element and / or a force-transmitting surface of the shape-locking protrusion of the additional coupling element, the inner side defining the shape-locking recess of the additional coupling element. Particularly preferably, the outer contour of the shape-locking protrusion of the additional coupling element is arranged on the end of the shape-locking protrusion of the additional coupling element facing the shape-locking recess of the additional coupling element. Preferably, the outer contour 248b of the pushing protrusion 216b and the outer contour of the shape-locking protrusion of the additional coupling element are constructed to be consistent. The first connector 68b particularly includes two retaining elements 252b that extend below the coupling element 87b along the longitudinal axis 154b of the first connector 68b. The retaining elements 252b are preferably configured to limit the movement of the coupling element 87b in a direction opposite to the coupling direction 214b of the coupling unit 80b. In particular, it is advantageous to prevent excessive relative movement of the two coupling elements 68b to be connected transverse to the connection direction 78b. The retaining element 252b, formed by the first connector 68b, preferably extends from the inner wall of the base of the first connector 68b, at least substantially perpendicular to the longitudinal axis 154b, into the internal region bounded by the base of the first connector 68b, when viewed along the longitudinal axis 154b of the first connector 68b. In particular, the retaining element 252b is configured as a groove, the main extending axis of which extends at least substantially parallel to the longitudinal axis 154b of the first connector 68b. However, other configurations of the retaining element 252b are also contemplated, such as as a protrusion, as a web or the like, and / or having one of two different numbers. Preferably, it is also possible to... Figures 1 to 8 The retaining element 252b is considered in the connecting device 66a, and especially in the first connecting member 68a, 70a described herein.

Claims

1. A connection device for a machine tool (12a; 12b) and / or for a machine tool system (10a; 10b), the connection device having At least one first connector (68a, 70a; 68b), the first connector (68a, 70a; 68b) having at least one base and at least one coupling element (87a, 88a; 87b), and said at least one coupling element (87a, 88a; 87b) being at least substantially disposed within the base of the first connector (68a, 70a; 68b); and At least one second connector (72a, 74a; 74b), the second connector (72a, 74a; 74b) having at least one base and at least one additional coupling element (89a, 90a), and said at least one additional coupling element (89a, 90a) being at least substantially disposed within the base of the second connector (72a, 74a; 74b); at least one fixing unit (76a), the fixing unit being configured to fix the base of the second connector (72a, 74a; 74b) to the base of the first connector (68a, 70a; 68b) by movement along at least substantially straight connection direction (78a; 78b); and At least one coupling unit (80a; 80b), said coupling unit being configured, at least in the coupled state, for transmitting the driving force of the machine tool (12a; 12b) at least substantially parallel to the connection direction (78a; 78b) from the coupling element (87a, 88a; 87b) of said coupling unit (80a; 80b) to another coupling element (89a, 90a) of said coupling unit (80a; 80b). Its features are, The coupling elements (87a, 88a; 87b) and / or the additional coupling elements (89a, 90a) form at least one guide surface (202a, 204a), which is oriented at an angle to the connection direction (78a; 78b) and configured to at least substantially automatically convert the coupling element (87a, 88a; 87b) or the additional coupling element (89a, 90a) into a coupled state when the two coupling elements (87a, 88a; 89a, 90a; 87b) move toward each other at least substantially parallel to the connection direction (78a; 78b).

2. The connecting device according to claim 1, characterized in that, The fixing unit (76a) is configured to at least substantially automatically fix the first connector (68a, 70a; 68b) and the second connector (72a, 74a; 74b) to each other when or after they are pushed into each other along the connection direction (78a; 78b), wherein the coupling unit (80a; 80b) is configured to at least substantially automatically transition to a coupled state when or after they are pushed into each other along the connection direction (78a; 78b).

3. The connecting device according to claim 1 or 2, characterized in that, The fixing unit (76a) includes at least one fixing element configured to at least substantially automatically fix the first connector (68a, 70a; 68b) and the second connector (72a, 74a; 74b) when they are pushed into each other, wherein the coupling unit (80a; 80b) includes at least two coupling elements (87a, 88a, 89a, 90a; 87b) engaging with each other in the coupled state of the coupling unit (80a; 80b), wherein the fixing element is configured to manipulate one of the two coupling elements (87a, 88a, 89a, 90a; 87b) (89a, 90a) when the first connector (68a, 70a; 68b) and the second connector (72a, 74a; 74b) are pushed into each other.

4. The connecting device according to claim 1 or 2, characterized in that, The coupling elements (87a, 88a; 87b) and the additional coupling elements (89a, 90a) are each individually constructed as sheet metal components and configured to engage with each other at least in a form-locking manner in order to transmit the driving force in the coupled state.

5. The connecting device according to claim 1 or 2, characterized in that, The coupling unit (80a; 80b) includes at least one coupling element (87a, 88a, 89a, 90a; 87b), which is elastically constructed, at least in the coupling region (178a) of the coupling unit (80a; 80b), against the direction of connection (78a; 78b), by at least one motion spring, wherein the unloaded state of the at least one coupling element (87a, 88a, 89a, 90a; 87b) corresponds to the basic position of the coupling element (87a, 88a, 89a, 90a; 87b) in the coupling state.

6. The connecting device according to claim 1 or 2, characterized in that, The coupling elements (87a, 88a; 87b) and the additional coupling elements (89a, 90a) each have at least one shape-locking protrusion (170a, 172a) and at least one shape-locking recess (174a, 176a), wherein these coupling elements (87a, 88a, 89a, 90a; 87b) are configured to engage with each other in a shape-locking manner in the coupling state of the coupling unit (80a; 80b).

7. The connecting device according to claim 1 or 2, characterized in that, The coupling elements (87a, 88a; 87b) are configured with at least one shape-locking protrusion (170a) and at least one pushing protrusion (216a; 216b), wherein the shape-locking protrusion (170a) is configured to transmit the driving force to the additional coupling element (89a, 90a) in a pulling direction oriented at least substantially parallel to the connection direction (78a; 78b), and wherein the pushing protrusion (216a; 216b) is configured to transmit the driving force to the additional coupling element (89a, 90a) in a pushing direction oriented at least substantially parallel to the connection direction (78a; 78b) and pointing opposite to the pulling direction.

8. The connecting device according to claim 1 or 2, characterized in that, The first connector (68a, 70a; 68b) and the second connector (72a, 74a; 74b) are each constructed at least substantially in a rod shape, wherein the connection direction (78a; 78b) is oriented at least substantially parallel to the longitudinal axis (154a; 154b) of the first connector (68a, 70a; 68b) and / or parallel to the longitudinal axis (154a; 154b) of the second connector (72a, 74a; 74b).

9. The connecting device according to claim 1 or 2, characterized in that, The coupling unit (80a; 80b) includes at least one coupling element (87a, 88a, 89a, 90a; 87b), which is capable of elastically oscillating in the coupling region (178a) of the coupling unit (80a; 80b) about an axis oriented at least substantially perpendicular to the connection direction (78a; 78b).

10. The connecting device according to claim 1 or 2, characterized in that, The fixing unit (76a) includes at least one locking element (150a) for form-fittingly fixing the second connector (72a, 74a; 74b) to the first connector (68a, 70a; 68b), wherein the locking element (150a) is configured to manipulate at least one coupling element (89a, 90a) of the coupling unit (80a; 80b) when the locking element (150a) moves to release the fixing unit (76a), wherein the coupling unit (80a; 80b) transitions from the coupled state to the decoupled state.

11. The connecting device according to claim 1 or 2, characterized in that, The coupling elements (87a, 88a; 87b) constitute at least one force transmission surface (218a, 228a), wherein the coupling unit (80a; 80b) has at least one straight coupling direction (214a; 214b) perpendicular to the connection direction (78a; 78b), and the coupling element (87a, 88a; 87b) is joined to another coupling element (89a, 90a) along the coupling direction, wherein the coupling direction (214a; 214b) forms an angle (224a, 230a) greater than 90° with at least one surface normal of the force transmission surface (218a, 228a).

12. The connecting device according to claim 1 or 2, characterized in that, The coupling unit (80a; 80b) and / or the fixing unit (76a) include at least one safety element (198a) configured to at least prevent the fixing unit (76a) from loosening and / or prevent the coupling unit (80a; 80b) from transitioning to a decoupled state, depending on the position of the coupling elements (87a, 88a, 89a, 90a; 87b) of the coupling unit (80a; 80b) relative to the safety element (198a).

13. The connecting device according to claim 1 or 2, characterized in that, The fixing unit (76a) includes at least one actuating element (158a) configured to release the fixing unit (76a), wherein the first connector (68a, 70a; 68b) at least partially constitutes a handle unit (28a), wherein the actuating element (158a) is configured as part of the second connector (72a, 74a; 74b) and is arranged spaced apart from the first connector (68a, 70a; 68b) along the longitudinal axis (154a; 154b) of the second connector (72a, 74a; 74b).

14. The connecting device according to claim 1 or 2, characterized in that, The coupling elements (87a, 88a; 87b) are configured with at least one push-out protrusion (216a; 216b) for pushing the additional coupling element (89a, 90a) along a push-out direction at least substantially parallel to the connection direction (78a; 78b) in order to transmit the driving force in the coupled state of the coupling unit (80a; 80b), wherein the push-out protrusion (216a; 216b) has at least one outer contour (248b) extending at least substantially perpendicular to the connection direction (78a; 78b), the outer contour being configured corresponding to the outer contour of the shape-locking protrusion (172a) of the additional coupling element (89a, 90a).

15. The connecting device according to claim 1, characterized in that, The machine tools (12a; 12b) are rod-connected machine tools.

16. The connecting device according to claim 1, characterized in that, The first connector is constructed as part of a basic unit (22a; 22b) of the machine tool (12a; 12b) or as part of an extension or adapter (16a; 16b).

17. The connecting device according to claim 1, characterized in that, The second connector is configured as part of an extension or adapter (16a; 16b) or as part of a tool attachment (14a) for the machine tool (12a; 12b).

18. The connecting device according to claim 1, characterized in that, The guide surface is configured to automatically convert either the coupling element (87a, 88a, 89a, 90a; 87b) or the other coupling element (89a, 90a) into a coupled state by the relative oscillation of the coupling elements (87a, 88a; 89a, 90a; 87b) about an axis that is at least substantially perpendicular to the orientation of the connection direction (78a; 78b) when the two coupling elements (87a, 88a; 89a, 90a; 87b) move toward each other at least substantially parallel to the connection direction (78a; 78b).

19. The connecting device according to claim 3, characterized in that, The fixing element is configured to manipulate one of the two coupling elements (87a, 88a, 89a, 90a; 87b) (89a, 90a) at least tilted in the connection direction (78a; 78b) when the first connector (68a, 70a; 68b) and the second connector (72a, 74a; 74b) are pushed into each other.

20. The connecting device according to claim 8, characterized in that, In the fixed state of the fixing unit (76a), the connection direction (78a; 78b) is oriented at least substantially parallel to the longitudinal axis (154a; 154b) of the first connector (68a, 70a; 68b) and / or parallel to the longitudinal axis (154a; 154b) of the second connector (72a, 74a; 74b).

21. The connecting device according to claim 9, characterized in that, The at least one coupling element is capable of elastically swinging in the coupling region (178a) of the coupling unit (80a; 80b) about an axis oriented at least substantially perpendicular to the connection direction (78a; 78b) in order to transition to the coupled state or to the decoupled state.

22. The connecting device according to claim 9, characterized in that, The axis is arranged in the vicinity of the connectors (68a, 70a, 72a, 74a; 68b, 74b) that include the coupling elements (87a, 88a, 89a, 90a; 87b).

23. The connecting device according to claim 10, characterized in that, The locking element (150a) is configured to at least one coupling element (89a, 90a) of the coupling unit (80a; 80b) when the locking element (150a) moves to release the fixing unit (76a).

24. The connecting device according to claim 13, characterized in that, The actuating element (158a) is arranged at a distance from the first connector (68a, 70a; 68b) along the longitudinal axis (154a; 154b) of the second connector (72a, 74a; 74b), at least independent of the state of the fixing unit (76a).

25. A machine tool having a connecting device according to any one of the preceding claims.

26. A machine tool system, comprising: At least one machine tool (12a; 12b) At least one tool accessory (14a) for direct or indirect connection with the machine tool (12a; 12b); At least one extension or adapter (16a; 16b) that can be arranged between the machine tool (12a; 12b) and the tool attachment (14a); and At least one connecting device (66a; 66b) according to any one of the preceding claims, the connecting device being configured to connect the machine tool (12a; 12b) to the extension or adapter (16a; 16b) or to the tool accessory (14a), or to connect the extension or adapter (16a; 16b) to the tool accessory (14a).

27. The machine tool system according to claim 26, characterized in that, The machine tools (12a; 12b) are rod-connected machine tools.

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