Cutting device, in particular pipe cutting device

Abstract

The invention is based on a cutting device (10), in particular a pipe cutting device, with at least one handle unit (12), with at least one upper slide unit (14) and at least one lower slide unit (16), wherein the upper slide unit (14) has a cutting element (18) and the lower slide unit (16) has at least one holding unit (20), wherein the upper slide unit (14) is mounted so as to be movable relative to the lower slide unit (16), and with at least one locking unit (22) which is designed to lock the upper slide unit (14) relative to the lower slide unit (16). It is proposed that the locking unit (22) has a frictional engagement element (24) by means of which the locking of the locking unit (22) takes place.

Description

State of the art

[0001] A cutting device, in particular a pipe cutting device, has already been proposed, comprising at least one handle unit, at least one upper slide unit and at least one lower slide unit, wherein the upper slide unit has a cutting element and the lower slide unit has at least one holding unit, wherein the upper slide unit is mounted so as to be movable relative to the lower slide unit, and at least one locking unit which is designed to lock the upper slide unit relative to the lower slide unit. Disclosure of the invention

[0002] The invention is based on a cutting device, in particular a pipe cutting device, with at least one handle unit, with at least one upper slide unit and at least one lower slide unit, wherein the upper slide unit has a cutting element and the lower slide unit has at least one holding unit, wherein the upper slide unit is mounted so as to be movable relative to the lower slide unit, and with at least one locking unit which is designed to lock the upper slide unit relative to the lower slide unit.

[0003] It is proposed that the locking unit has a frictional engagement element by means of which the locking of the locking unit takes place.

[0004] A “cutting device” should be understood in particular to mean a device which is designed to separate a cylindrical component, in particular a pipe, into two sections. The cutting device is preferably designed to completely separate a cylindrical component, in particular a pipe, into two sections. The cutting device is preferably designed to separate a cylindrical component, in particular a pipe, into two sections at least partially automatically, in particular automatically. The cutting device is preferably designed to be picked up by a user. The cutting device is handheld, in particular in operation. “Designed” should be understood in particular to mean specially programmed, designed and / or equipped.The fact that an object is configured for a specific function should be understood in particular to mean that the object fulfills and / or performs this specific function in at least one application and / or operating state. Preferably, the cutting device has a handle unit. A “handle unit” should be understood in particular as a unit by means of which a user holds the cutting device in an operating state. Preferably, the handle unit is designed to be adapted to the requirements of the user. In particular, it is conceivable that the handle unit has a non-slip surface in a hand region of the handle unit, by means of which user safety is increased. Preferably, the handle unit at least partially forms a housing of the cutting device. Preferably, the handle unit accommodates the upper slide unit and the lower slide unit.Particularly preferably, the handle unit accommodates all components of the cutting device. The handle unit is preferably constructed in multiple parts. The handle unit is preferably made of a plastic. Alternatively, it is conceivable for the handle unit to be constructed from a metallic material and / or several different materials. Furthermore, any other material deemed appropriate by a person skilled in the art is conceivable for the handle unit.

[0005] An “upper slide unit” should be understood in particular to mean a unit which has a receptacle for a cutting element and is designed to be linearly movable relative to a lower slide unit. The upper slide unit preferably has a first guide element. The upper slide unit preferably forms a first guide element. Alternatively, it is conceivable for the first guide element to be integrally formed, in particular one-piece, with the upper slide unit. “Integral” should be understood in particular to mean materially bonded, for example by a welding process and / or gluing process, etc., and particularly advantageously to mean integrally formed, such as by production from a single casting and / or by production in a single-component or multi-component injection molding process. Advantageously, “integral” should also be understood to mean one-piece. “One-piece” should be understood in particular to mean formed in one piece.Preferably, this one piece is produced from a single blank, a mass and / or a cast, particularly preferably in an injection molding process, in particular a single and / or multi-component injection molding process. Preferably, the first guide element is designed as an elongated cuboid. Alternatively, other shapes that appear appropriate to a person skilled in the art are also conceivable. Preferably, the first guide element has a feedthrough. Preferably, the feedthrough has a circular cross-section in a cross-section perpendicular to a main direction of extension of the feedthrough. Alternatively, any other cross-section perpendicular to a main direction of extension of the feedthrough that appears appropriate to a person skilled in the art, for example polygonal or oval, is conceivable. Preferably, the first guide element is designed as a plain bearing.The cutting element is preferably connected to the upper slide unit via a rotational axis. A “cutting element” should be understood in particular to be an element which is designed to cut a cylindrical component, in particular a pipe. The cutting element is preferably movably mounted in a receptacle of the upper slide unit. The term “movably mounted” here is intended in particular to define a mounting of an element, wherein the element, in particular decoupled from an elastic deformation of the element, has the possibility of movement about at least one axis by an angle greater than 270°, preferably greater than 315° and particularly preferably 360° and / or the possibility of movement along at least one distance greater than 10 mm, preferably greater than 15 mm and particularly preferably greater than 30 mm. The cutting element is preferably rotatably mounted in a receptacle of the upper slide unit.The cutting element is preferably designed as a rotatably mounted blade. The term "rotatably mounted" is intended here, in particular, to define a mounting of an element, wherein the element, in particular decoupled from elastic deformation of the element, has the possibility of movement around at least one axis of 360°. Alternatively, any other design of the cutting element that appears appropriate to a person skilled in the art is conceivable. The cutting element is preferably designed as a circular blade. The cutting element is preferably configured to cut a cylindrical component, in particular a pipe, on the lateral surface of the cylindrical component by rotating the cutting element around a rotation axis of the cylindrical component, in particular a pipe.

[0006] A “lower slide unit” should be understood in particular as a unit which is designed to provide a receptacle for a cylindrical component, in particular a pipe. The lower slide unit preferably has a second guide element. The lower slide unit preferably forms a second guide element. Alternatively, it is conceivable for the second guide element to be integrally formed, in particular one-part, with the lower slide unit. The second guide element is preferably designed as an elongated component which, in a laid-out state, has a vertical extent which is many times greater than a longitudinal extent and a transverse extent of the component. The second guide element is preferably provided to define a path. The second guide element is preferably provided to define a path for a first guide element.Preferably, a first guide element slides on the second guide element. Preferably, the second guide element is designed in particular as a guide web. Preferably, the first guide element is mounted so as to be movable along a second guide element. Preferably, the first guide element is mounted so as to be linearly movable along a second guide element. Preferably, the second guide element has a circular cross-section in a cross-section perpendicular to a main direction of extent of the second guide element. Alternatively, any other cross-section perpendicular to a main direction of extent of the second guide element that appears appropriate to a person skilled in the art, for example, polygonal or oval, is conceivable.Particularly preferably, the cross section is designed to be perpendicular to a main direction of extent of the second guide element and the cross section of the passage of the first guide element is designed to be perpendicular to a main direction of extent of the passage. Preferably, the cross section perpendicular to a main direction of extent of the second guide element and the cross section of the passage of the first guide element perpendicular to a main direction of extent of the passage have a clearance fit. Preferably, the lower slide unit has at least one holding unit. A “holding unit” should be understood in particular to mean a unit which is designed to receive a cylindrical component, in particular a pipe. Preferably, the holding unit is designed to receive a cylindrical component, in particular a pipe, in a rotatably mounted manner. Preferably, the holding unit has at least one roller, preferably at least two rollers.The rollers are preferably arranged so as to be rotatably mounted. The rollers are preferably configured to rotatably mount a cylindrical component, in particular a tube. The cylindrical component, in particular a tube, is preferably accommodated by the rollers. A "main direction of extension" of an object is understood to mean, in particular, a direction that runs parallel to a longest edge of a smallest geometric cuboid that just completely encloses the object.

[0007] A “locking unit” should be understood in particular as a mechanical unit which is designed to lock moving parts. Preferably, the locking unit transmits a frictional force from a frictional engagement element to the upper slide unit. Preferably, the locking unit is designed to lock the upper slide unit to the lower slide unit. Preferably, the locking unit is designed in several parts. Preferably, the locking unit is designed to center a cylindrical component, in particular a pipe, in a cutting device during a processing step. In this context, a “locking” should be understood in particular as the mechanical process of locking moving parts. Preferably, the locking unit has at least one frictional engagement element.A “frictional engagement element” should be understood in particular as an element by means of which the locking of the locking unit is carried out. Preferably, the frictional engagement element is designed to enter into a frictional engagement, in particular a force-locking engagement, with the upper slide unit. Preferably, the frictional engagement element is designed to maintain a locking of an upper slide unit to a lower slide unit via a frictional engagement, in particular a force-locking engagement, in one operating step. Preferably, the frictional engagement element is designed to release a frictional engagement, in particular a force-locking engagement, in a release step. Preferably, the frictional engagement element is designed to transfer a frictional force to an upper slide unit. Preferably, a rotational movement is converted into a linear movement by the frictional engagement element.Preferably, the frictional engagement element converts a rotational movement into a linear movement by transmitting a frictional force. Preferably, the frictional engagement element transfers a frictional force to the upper slide unit. Preferably, the frictional force moves the upper slide unit linearly relative to a lower slide unit. Preferably, the frictional engagement element is rotatably mounted.

[0008] The inventive design of the cutting device makes it possible to provide advantageous properties with regard to automatic locking of a cutting device. In particular, the inventive design of the cutting device makes it possible to achieve a cutting device with a simplified construction. In particular, advantageous properties with regard to uniform cutting of a cylindrical component can be achieved. In particular, installed cylindrical components, in particular pipes, can be cut. This makes it possible to achieve particularly advantageous properties with regard to ease of use.

[0009] Furthermore, it is proposed that the cutting device comprise a rotating element configured to support the upper carriage unit and the lower carriage unit for rotation about a rotation axis. Preferably, the rotating element is configured to mount the upper carriage unit and the lower carriage unit for rotation about a rotation axis relative to a handle unit. Preferably, the rotating element is movably mounted on a handle unit. Preferably, the lower carriage unit is rigidly connected to the rotating element.The fact that at least one first element is “connected” to at least one further element should be understood in particular to mean that the first element is advantageously connected to the further element via at least one frictional connection and / or at least one positive connection, for example via a riveting and / or snap-in connection and / or a tongue and groove connection and / or a clamping connection and / or another connection that appears appropriate to a person skilled in the art, and / or is integrally connected to the further element, for example by a welding process, an adhesive process, an injection-molding process and / or another process that appears appropriate to a person skilled in the art. Preferably, the upper slide unit is arranged on the rotary element so as to be movable via the lower slide unit.A “rotary element” should be understood in particular as an element which is designed to provide a rotary movement of the cutting element about a rotation axis of the cylindrical component, in particular a pipe. The rotary element preferably has a circular cross-section in a cross-section parallel to a main extension direction of the rotary element. The circular ring shape of the rotary element preferably extends over at least a radius of preferably a maximum of 270°, preferably a maximum of 300° and particularly preferably a maximum of 315°. The inner radius of the circular ring shape of the rotary element is preferably larger than a radius of the cylindrical component, in particular a pipe. Alternatively, any other design of the rotary element which appears appropriate to a person skilled in the art is conceivable. This makes it possible to provide advantageous properties with regard to automatically locking a cutting device.In particular, advantageous properties can be achieved with regard to uniform cutting of a cylindrical component.

[0010] It is further proposed that a cutting device comprise a drive unit and a rotational element, wherein the drive unit drives the rotational element in a rotational movement. A “drive unit” is to be understood in particular as a unit which converts electrical energy into kinetic energy. The drive unit is preferably arranged in a handle unit. The drive unit is preferably supplied with electrical energy via a rechargeable battery and / or a mains plug. The cutting device preferably comprises a control and regulating unit which is configured to regulate operation of the cutting device. The control and regulating unit preferably comprises a user interface by means of which a user can regulate operation of the cutting device. The control and regulating unit is preferably configured to regulate a direction of rotation of the drive unit.In particular, it is conceivable for the control and regulating unit to regulate a rotational speed of the drive unit. A “control and regulating unit” should be understood in particular to mean a unit with at least one control electronics unit. A “control electronics unit” should be understood in particular to mean a unit with a processor unit and with a memory unit as well as with an operating program stored in the memory unit. Preferably, a rotary movement of the drive unit is transmitted to the rotary element via a coupling point. Preferably, the drive unit has a toothing at the coupling point, by means of which a rotary movement of the drive unit is transmitted to the rotary element. A “rotary element” should be understood in particular to mean an element which is designed to transfer kinetic energy from a drive unit to a rotary element.The rotary element preferably has a toothing on its outer radius. The toothing is preferably designed to correspond to a toothing of the drive unit. Preferably, a rotational movement is transmitted from a toothing of the drive unit to a toothing of the rotary element. Preferably, the rotary element has a circular cross-section parallel to a main direction of extension of the rotary element. Preferably, the circular ring shape of the rotary element extends over at least a radius of preferably a maximum of 270°, preferably a maximum of 300°, and particularly preferably a maximum of 315°. Preferably, the inner radius of the circular ring shape of the rotary element is larger than a radius of the cylindrical component, in particular a tube. Alternatively, any other design of the rotary element that appears appropriate to a person skilled in the art is conceivable.Preferably, the rotation element is movably mounted to form a handle unit. Preferably, the rotation element is movably mounted to form a rotary element. This allows for advantageous properties with regard to automatic locking of a cutting device. In particular, advantageous properties with regard to uniform cutting of a cylindrical component can be achieved.

[0011] Furthermore, it is proposed that the locking unit has a driver element which is fixedly arranged on the rotation element.

[0012] Preferably, the driver element is arranged so as to be at least substantially non-detachably connected to a rotating element. By “at least substantially non-detachably” is meant in particular a connection of at least two elements which can only be separated from one another with the aid of separating tools, such as a saw, in particular a mechanical saw, etc., and / or chemical separating agents, such as solvents, etc. Alternatively, it is conceivable for the driver element to be arranged so as to be detachably connected to a rotating element using a tool. In this context, “detachably” is meant in particular to mean “non-destructively separable”. Furthermore, the driver element is formed as a single piece, in particular as a single piece, connected to the rotating element. A “driver element” is meant in particular as an element which transfers a rotational movement from a rotating element to a rotating element.The driver element is preferably arranged on an outer radius of the rotating element. An outer edge of the driver element preferably runs spirally to the rotational axis of the rotating element. Particularly preferably, an outer edge of the driver element runs at least substantially partially spirally from an outer radius of the rotating element to the rotational axis of the rotating element. Alternatively, it is conceivable for an outer edge of the driver element to run at least substantially partially tangentially from an outer radius of the rotating element toward an inner radius of the rotating element. This makes it possible to provide advantageous properties with regard to automatically locking a cutting device. In particular, advantageous properties with regard to uniform cutting of a cylindrical component can be achieved.

[0013] It is further proposed that the frictional engagement element is formed by a roller which is rotatably mounted and arranged in a vicinity of the upper slide unit. Preferably, the frictional engagement element is arranged in a receptacle of the upper slide unit. Particularly preferably, the roller is arranged in a vicinity of the first guide element. Preferably, the roller is rotatably mounted relative to the upper slide unit and a rotation element. Preferably, the roller is designed to convert a rotational movement of the rotation element into a linear movement of the upper slide unit. Preferably, the roller is designed to convert a rotational movement of the rotation element to the rotation element. Preferably, the roller runs along the outer edge of the driver element in one operating step.Preferably, a rotational movement is transferred via the driver element to the roller and from the roller to the rotating element and / or the upper carriage unit. In this context, a "near area" is to be understood in particular as a spatial, in particular spherical, area which preferably extends with a radius of a maximum of 20 mm, preferably a maximum of 15 mm and particularly preferably a maximum of 1 mm around a geometric center of the processing area. Preferably, the roller is arranged in contact with the first guide element of the upper carriage unit. Preferably, the roller is arranged in contact with a driver element. This can provide advantageous properties with regard to automatic locking of a cutting device.

[0014] Furthermore, it is proposed that the rotary element and the rotation element be rotatably mounted relative to one another. Preferably, the rotary element and the rotation element are arranged at least substantially parallel. By "substantially parallel" is meant here, in particular, an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction, in particular less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. Preferably, the rotary element and the rotation element are rotatably mounted about a rotation axis.Preferably, the rotary element and the rotation element are arranged in contact on a side arranged at least substantially parallel to a main direction of extension of the rotary element and on a side arranged at least substantially parallel to a main direction of extension of the rotary element. Preferably, the rotary element and the rotation element are mounted so as to be movable relative to one another, preferably by a maximum of 270°, preferably by a maximum of 315°, and particularly preferably completely rotatable. "Rotatable" is understood to mean rotation about a rotation axis. This makes it possible to provide particularly advantageous properties with regard to a simplified construction.

[0015] It is further proposed that the rotary element have a bulge which is designed to limit a rotational movement between the rotary element and the rotational element. Preferably, the bulge is formed on an outer radius of the rotary element. Alternatively, any other design of the bulge which appears appropriate to a person skilled in the art is conceivable. Preferably, the bulge is designed to limit a rotational movement between the rotary element and the rotational element via the driver element. Preferably, the bulge is arranged at least substantially parallel to a rotational element. Preferably, the bulge is designed to correspond to a driver element. Preferably, the bulge is designed to engage with a driver element in one operating step. This makes it possible to provide particularly advantageous properties with regard to a simplified design.

[0016] It is further proposed that the cutting device have a holding element which is designed to limit a movement of the rotary element. Preferably, the holding element is designed to limit a rotational movement of the rotary element. Preferably, the holding element is arranged so as to be movably mounted on a rotary element. Preferably, the holding element is designed so as to be movably mounted with the rotary element about a rotation axis. Preferably, the holding element has a drop-shaped cross-section at least substantially parallel to a main direction of extension of the rotary element. Alternatively, any other cross-section of the holding element to a main direction of extension of the rotary element that appears appropriate to a person skilled in the art is conceivable. A “holding element” should be understood in particular to mean an element which is designed to limit a rotational movement of the rotary element with a handle unit.The handle unit preferably has a stop element which is designed to limit a rotary movement of the rotary element. The stop element is preferably designed to correspond to a holding element. The stop element is preferably designed to limit a rotary movement of the rotary element relative to a handle unit in one operating step. The stop element is preferably designed in one piece, in particular as one piece, with the handle unit. The stop element is preferably formed on the handle unit in a vicinity of the rotary element. The holding element preferably engages in the stop element in one operating step. A counterclockwise rotary movement of the rotary element is preferably limited by the engagement of the holding element in the stop element. This makes it possible to provide particularly advantageous properties with regard to a simplified design.

[0017] The invention further relates to a method for operating a cutting device according to the invention, in particular a pipe cutting device. It is proposed that in a locking step the upper slide unit is locked to the lower slide unit. Preferably, in the locking step the upper slide unit is firmly locked to a lower slide unit. Preferably, in the locking step a cylindrical component, in particular a pipe, is fixed between the lower slide unit and the upper slide unit. Preferably, in the locking step the upper slide unit is variably fixed to the lower slide unit. Preferably, in the locking step the upper slide unit is locked to a lower slide unit depending on a diameter of the cylindrical component.Preferably, in the locking step, a cylindrical component, in particular a tube, is fixed between a cutting element of the upper slide unit and the holding element of the lower slide unit. Preferably, in the locking step, a cylindrical component, in particular a tube, is mounted so as to be movable about rotation between a cutting element of the upper slide unit and the holding element of the lower slide unit. This allows particularly advantageous properties with regard to uniform cutting of a cylindrical component to be achieved.

[0018] It is further proposed that in a locking step the frictional engagement element displaces the upper slide unit linearly against the lower slide unit by means of a rotational movement of the rotation element. Preferably, in the locking step the upper slide unit is displaced linearly against the lower slide unit. Preferably, in the locking step the upper slide unit and the lower slide unit are mounted linearly relative to one another. Preferably, in the locking step the upper slide unit is displaced linearly depending on a diameter of the cylindrical component, in particular a tube. Preferably, in the locking step a rotational movement of the rotation element is converted into a linear movement of the upper slide unit relative to a lower slide unit.Preferably, in the locking step, the linear movement of the upper slide unit relative to a lower slide unit is limited by a lateral surface of the cylindrical component, in particular the tube. Particularly preferably, in the locking step, the upper slide unit is locked relative to a lower slide unit by a clockwise rotational movement of the rotation element. Preferably, in the locking step, the upper slide unit is moved linearly in the direction of a lower slide unit by a clockwise rotational movement of the rotation element. In particular, it is conceivable that in the locking step, the upper slide unit is moved linearly against a lower slide unit by a counterclockwise rotational movement of the rotation element.Alternatively, it is conceivable that, in the locking step, the upper carriage unit is moved linearly toward a lower carriage unit by a counterclockwise rotational movement of the rotation element. This can provide advantageous properties with regard to automatic locking of a cutting device. In particular, advantageous properties with regard to uniform cutting of a cylindrical component can be achieved.

[0019] It is further proposed that, in a locking step, the driver element converts a rotary movement of the rotary element into a linear movement via the frictional engagement element. Preferably, in the locking step, the driver element converts a rotary movement of the rotary element via the frictional engagement element into a linear movement of the upper carriage unit to a lower carriage unit. Preferably, in the locking step, the driver element converts a rotary movement of the rotary element via the roller into a linear movement of the upper carriage unit. Preferably, in the locking step, a rotary movement of the rotary element is transmitted to the frictional engagement element via the driver element.Preferably, in the locking step, the frictional engagement element, in particular the roller, is guided along an outer edge of the driver element by the rotary movement of the rotary element. Preferably, in the locking step, the upper carriage unit is moved linearly to a lower carriage unit by a frictional force generated between the driver element and the frictional engagement element. Preferably, in the locking step, a rotary movement of the frictional engagement element is converted into a linear movement of the upper carriage unit by a further frictional force between the frictional engagement element and the upper carriage unit. Preferably, in the locking step, the frictional engagement element, in particular the roller, is moved in the direction of the rotational axis of the rotary element by means of the rotary movement of the driver element.Preferably, in the locking step, the rotary movement transmitted to the frictional engagement element is transferred to the upper carriage unit, wherein the rotary movement is converted into a linear movement to a lower carriage unit. Preferably, in the locking step, the linear movement is stopped as soon as the upper carriage unit with the cutting element strikes the outer surface of the cylindrical component, in particular a pipe. Particularly preferably, in the locking step, during a rotary movement of the rotary element in a clockwise direction, a rotary movement is converted into a linear movement via the frictional engagement element. This makes it possible to provide advantageous properties with regard to automatic locking of a cutting device. In particular, advantageous properties with regard to uniform cutting of a cylindrical component can be achieved.

[0020] Furthermore, it is proposed that in a machining step the locking of the component, in particular a pipe, between an upper slide unit and a lower slide unit is maintained via the spring force of the frictional engagement element. Preferably, in the machining step, a spring force of the frictional engagement element to a driver element and the upper slide unit is maintained, so that the locking of the upper slide unit to a lower slide unit is maintained. Preferably, in a machining step, the spring force is generated by the rotary movement of the rotary element through the frictional force between a frictional engagement element and the driver element. Preferably, in the machining step, a locking is maintained for the entire duration of the machining.In this context, a "processing step" should be understood to mean, in particular, a method step in which the cutting device divides a cylindrical component, in particular a pipe, into two sections. Preferably, in the processing step, a cutting element of the upper slide unit is guided in rotation on a lateral surface of the cylindrical component, in particular a pipe, around the cylindrical component, in particular a pipe. In particular, it is conceivable that in a processing step, the locking unit has a spring element which alternatively and / or additionally maintains a locking of the upper slide unit relative to a lower slide unit. This makes it possible to achieve particularly advantageous properties with regard to uniform cutting of a cylindrical component.

[0021] It is further proposed that in a machining step, a rotary movement is transferred from a rotary element to a rotary element by means of the frictional engagement between the frictional engagement element and the driver element. Preferably, in the machining step, a rotary movement is transferred from a rotary element to a rotary element as soon as the upper slide unit strikes the outer surface of the cylindrical component, in particular a pipe, and locking of the upper slide unit to a lower slide unit is completed. Preferably, in the machining step, the rotary movement is transferred from the rotary element to the rotary element via the frictional force between the frictional engagement element and the driver element. Preferably, in a machining step, the rotary element and the rotary element have an identical rotational speed.Preferably, the rotary movement transmitted via the frictional engagement element and the driver element guides the cutting element of the upper slide unit around the cylindrical component, in particular the pipe. Preferably, in one processing step, a cutting element of the upper slide unit is guided around the cylindrical component at least substantially perpendicular to a main extension direction of the cylindrical component, in particular the pipe. This allows particularly advantageous properties with regard to uniform cutting of a cylindrical component to be achieved.

[0022] Furthermore, it is proposed that in a release step, an opposite rotary movement is carried out than in a locking step and a machining step, wherein a bulge of the rotary element limits a rotary movement between the rotary element and the rotary element. Preferably, in the release step, a rotary movement of the rotary element is reversed by means of the drive unit. Particularly preferably, in a release step, the rotary movement of the drive unit is reversed by means of the control and regulating unit than in a locking step and a machining step. Preferably, in a release step, a rotary movement of the rotary element is carried out counterclockwise. Preferably, in a release step, a frictional engagement between a frictional engagement element, in particular a roller, and a driver element is canceled by the opposite rotation of the rotary element.Preferably, in a release step, the contact between a frictional engagement element, in particular a roller, and a driver element is released by the opposite rotation of the rotating element, whereby the locking of the upper carriage unit to a lower carriage unit is released. In this context, a “release step” is to be understood in particular as a method step in which the locking of the upper carriage unit to a lower carriage unit is released and the cutting device is returned to an initial state. Preferably, in the release step, an opposite rotary movement of the rotating element is transmitted to the rotating element. Preferably, in the release step, an opposite rotary movement of the rotating element is transmitted to the rotating element via the driver element and the bulge of the rotating element.Preferably, in the release step, the bulge of the rotary element strikes the driver element upon an opposing rotational movement of the rotary element, thereby transmitting an opposing rotational movement of the rotary element to the rotary element. Alternatively, it is conceivable for the rotary element to have another stop, which would appear appropriate to a person skilled in the art, against which the bulge of the rotary element strikes in order to transmit an opposing rotational movement of the rotary element to the rotary element. This can provide particularly advantageous properties with regard to releasing the locking mechanism.

[0023] It is further proposed that in a release step, an opposite rotary movement is carried out than in a locking step and a processing step, wherein a holding element suspends the transmission of a rotary movement from a rotary element to a rotary element and resets the cutting device to an initial state. Preferably, in the release step, an opposite rotary movement from a rotary element to a rotary element is suspended as soon as the holding element encounters a stop of the handle unit. Preferably, in the release step, the holding element encounters the stop of the handle unit due to the opposite rotary movement of the rotary element. Preferably, in the release step, contact between the driver element and the bulge of the rotary element is released as soon as the holding element encounters a stop of the handle unit.Preferably, in the release step, the rotating element is fixed in an initial state by the stop of the holding element against the stop of the handle unit. In particular, it is conceivable that in a release step, the rotating element is stopped in an initial state by regulating the rotational movement of the drive unit. This can provide particularly advantageous properties with regard to moving the cutting device to an initial state.

[0024] The cutting device according to the invention, in particular the pipe cutting device, is not intended to be limited to the application and embodiment described above. In particular, the cutting device according to the invention, in particular the pipe cutting device, can have a number of individual elements, components, units, and method steps that differs from the number stated herein to fulfill a function described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also intended to be disclosed and can be used as desired. drawing

[0025] Further advantages will become apparent from the following description of the drawings. The drawing illustrates an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into further meaningful combinations.

[0026] They show: Fig. 1 a cutting device according to the invention in a schematic representation, Fig. 2 a schematic flow diagram of a method for operating a cutting device according to the invention, Fig. 3 a schematic sequence of the method of a cutting device according to the invention, Fig. 4 a sectional view of a cutting device according to the invention in a schematic representation, Fig. 5 a sectional view of a cutting device according to the invention in a schematic representation and Fig. 6 an exploded view of a cutting device according to the invention in a schematic representation. Description of the embodiment

[0027] Fig. 1 shows a cutting device 10, in particular a pipe cutting device. The cutting device 10 is designed to completely separate a cylindrical component, in particular a pipe, into two sections. The cutting device 10 is designed to automatically separate a cylindrical component, in particular a pipe, into two sections. The cutting device 10 is designed to be picked up by a user. The cutting device 10 has a handle unit 12. The cutting device 10 has at least one handle unit 12. The handle unit 12 is designed to be adapted to the user's requirements. In particular, it is conceivable for the handle unit 12 to have a non-slip surface in a hand region of the handle unit 12, by means of which user safety is increased. The handle unit 12 forms the housing of the cutting device 10.The handle unit 12 accommodates an upper carriage unit 14 and a lower carriage unit 16. The handle unit 12 accommodates all components of the cutting device 10. The handle unit 12 is constructed in several parts. The handle unit 12 is made of a plastic. Alternatively, it is conceivable that the handle unit 12 is made of a metallic material and / or several different materials. Furthermore, any other material deemed appropriate by a person skilled in the art is conceivable for the handle unit 12. (see . Fig. 4, Fig. 5 and Fig. 6)

[0028] The cutting device 10 has at least one upper carriage unit 14 and at least one lower carriage unit 16, wherein the upper carriage unit 14 has a cutting element 18 and the lower carriage unit 16 has at least one holding unit 20. The upper carriage unit 14 is movably mounted relative to the lower carriage unit 16. The upper carriage unit 14 has a first guide element 46. The upper carriage unit 14 forms a first guide element 46. Alternatively, it is conceivable that the first guide element 46 is integrally formed, in particular one-piece, with the upper carriage unit 14. The first guide element 46 is designed, in particular, as an elongated cuboid. Alternatively, other shapes that appear appropriate to a person skilled in the art are also conceivable. The first guide element 14 has a leadthrough.The feedthrough has a circular cross-section in a cross-section perpendicular to a main direction of extension of the feedthrough. Alternatively, any other cross-section perpendicular to a main direction of extension of the feedthrough that appears appropriate to a person skilled in the art, for example polygonal or oval, is conceivable. The first guide element 46 is designed as a plain bearing. The cutting element 18 is connected to the upper carriage unit 14 via a rotation axis. The cutting element 18 is rotatably mounted in a receptacle of the upper carriage unit 14. The cutting element 18 is designed as a rotatably mounted blade. Alternatively, any other design of the cutting element 18 that appears appropriate to a person skilled in the art is conceivable. The cutting element 18 is designed as a circular blade.The cutting element 18 is configured to cut a cylindrical component, in particular a pipe, on the outer surface of the cylindrical component by rotating the cutting element 18 about the axis of rotation of the cylindrical component, in particular a pipe. The lower slide unit 16 has a second guide element 48. The lower slide unit 16 forms a second guide element 48. Alternatively, it is conceivable for the second guide element 48 to be integrally formed, in particular one-piece, with the lower slide unit 16. The second guide element 46 is configured as an elongated component which, in a laid-out state, has a vertical extension that is many times greater than a longitudinal extension and a transverse extension of the component. The second guide element 48 is provided to define a path. The second guide element 48 is provided to define a path for a first guide element 46.A first guide element 46 slides on the second guide element 48. The second guide element 48 is designed as a guide web. The first guide element 46 is mounted so as to be movable along a second guide element 48. The first guide element 46 is mounted so as to be linearly movable along a second guide element 48. The second guide element 48 has a circular cross-section in a cross-section perpendicular to a main direction of extent of the second guide element 48. Alternatively, any other cross-section perpendicular to a main direction of extent of the second guide element 48 that appears appropriate to a person skilled in the art, for example polygonal or oval, is conceivable. The cross-section perpendicular to a main direction of extent of the second guide element 48 and the cross-section of the feedthrough of the first guide element 46 perpendicular to a main direction of extent of the feedthrough are designed so as to be coordinated.The cross section perpendicular to a main direction of extension of the second guide element 48 and the cross section of the passage of the first guide element 46 perpendicular to a main direction of extension of the passage have a clearance fit. The lower slide unit 48 has at least one holding unit 20. The holding unit 20 is designed to receive a cylindrical component, in particular a pipe, in a rotatable manner. The holding unit 20 has rollers 50. The rollers 50 are arranged in a rotatable manner. The rollers 50 are designed to rotatably support a cylindrical component, in particular a pipe. The cylindrical component, in particular a pipe, is received by the rollers 50. (see . Fig. 4, Fig. 5 and Fig. 6)

[0029] The cutting device 10 has at least one locking unit 22, which is configured to lock the upper carriage unit 14 to the lower carriage unit 16. The locking unit 22 transmits a frictional force from a frictional engagement element 24 to the upper carriage unit 14.

[0030] The locking unit 22 is configured to lock the upper slide unit 14 to the lower slide unit 16. The locking unit 22 is constructed in multiple parts. The locking unit 22 is configured to center a cylindrical component, in particular a pipe, in a cutting device 10 during a processing step.

[0031] The locking unit 22 has a frictional engagement element 24, by means of which the locking of the locking unit 22 takes place. The frictional engagement element 24 is designed to enter into a frictional engagement, in particular a force engagement, with the upper slide unit 14. The frictional engagement element 24 is designed to maintain a locking of an upper slide unit 14 to a lower slide unit 16 via a frictional engagement, in particular a force engagement, in a processing step 42. The frictional engagement element 24 is designed to release a frictional engagement, in particular a force engagement, with an upper slide unit 14 in a release step 44. The frictional engagement element 24 is designed to transfer a frictional force to an upper slide unit 14. The frictional engagement element 24 converts a rotary movement into a linear movement.The frictional engagement element 24 converts a rotational movement into a linear movement of the upper slide unit 14 by transmitting a frictional force. The frictional engagement element 24 transfers a frictional force to the upper slide unit 14. The frictional force causes the upper slide unit 14 to move linearly relative to a lower slide unit 16. The frictional engagement element 24 is rotatably mounted.

[0032] The cutting device 10 has a rotating element 26, which is configured to support the upper carriage unit 14 and the lower carriage unit 16 for rotation about a rotation axis 28. The rotating element 26 is configured to mount the upper carriage unit 14 and the lower carriage unit 16 for rotation about a rotation axis 28 relative to a handle unit 12. The rotating element 26 is movably mounted on a handle unit 12. The lower carriage unit 16 is rigidly connected to the rotating element 26. The upper carriage unit 14 is movably mounted on the rotating element 26 via the lower carriage unit 16. The rotating element 26 has a circular cross-section in a cross-section parallel to a main direction of extension of the rotating element 26. The inner radius of the circular ring shape of the rotating element 26 is larger than a radius of the cylindrical component, in particular the pipe.Alternatively, any other design of the rotating element 26 that appears reasonable to a person skilled in the art is conceivable.

[0033] The cutting device 10 has a drive unit 30 and a rotation element 32, wherein the drive unit 30 drives the rotation element 32 in a rotational movement. The drive unit 30 is arranged in a handle unit 12. The drive unit 30 is supplied with electrical energy via a battery and / or a power plug. The cutting device 10 has a control and regulating unit 52, which is configured to regulate operation of the cutting device 10. The control and regulating unit 52 has a user interface by means of which a user can regulate the operation of the cutting device 10. The control and regulating unit 52 is configured to regulate a direction of rotation of the drive unit 30. In particular, it is conceivable for the control and regulating unit 52 to regulate a rotational speed of the drive unit 30.A rotary movement of the drive unit 30 is transmitted to the rotary element 32 via a coupling point 54. The drive unit 30 has a toothing at the coupling point 54, by means of which a rotary movement of the drive unit 30 is transmitted to the rotary element 32. The rotary element 32 has a toothing on its outer radius. The toothing is designed to correspond to a toothing of the drive unit 30. A rotary movement is transmitted from a toothing of the drive unit 30 to a toothing of the rotary element 32. The rotary element 32 has a cross-section parallel to a main extension direction of the rotary element 32, which is circular in shape. The inner radius of the circular ring shape of the rotary element 32 is larger than a radius of the cylindrical component, in particular the tube.Alternatively, any other design of the rotation element 32 that appears appropriate to a person skilled in the art is conceivable. The rotation element 32 is movably mounted to form a handle unit 12. The rotation element 32 is movably mounted to form a rotary element 26.

[0034] The locking unit 22 has a driver element 34, which is fixedly arranged on the rotating element 32. The driver element 34 is arranged so as to be at least substantially non-detachably connected to a rotating element 32. Alternatively, it is conceivable for the driver element 34 to be arranged so as to be detachably connected to a rotating element 32 using a tool. Furthermore, the driver element 34 is formed integrally, in particular integrally, with the rotating element 32. The driver element 34 is arranged on an outer radius of the rotating element 32. An outer edge of the driver element 34 extends spirally to the rotational axis 28 of the rotating element 32. An outer edge of the driver element 34 extends at least substantially partially spirally from an outer radius of the rotating element 32 to the rotational axis 28 of the rotating element 32.Alternatively, it is conceivable that an outer edge of the driver element 34 extends at least substantially partially tangentially from an outer radius of the rotation element 32 in the direction of an inner radius of the rotation element 32.

[0035] The frictional engagement element 24 is formed by a roller which is rotatably mounted and arranged in a vicinity of the upper carriage unit 14. The frictional engagement element 24 is arranged in a receptacle of the upper carriage unit 14. The roller is arranged in a vicinity of the first guide element 46. The roller is rotatably mounted to the upper carriage unit 14 and a rotation element 32. The roller is designed to convert a rotational movement of the rotation element 32 into a linear movement of the upper carriage unit 14. The roller is designed to convert a rotational movement of the rotation element 32 to the rotation element 26. In one operating step, the roller runs along the outer edge of the driver element 34. A rotational movement is transferred via the driver element 34 to the roller and from the roller to the rotation element 26 and / or the upper carriage unit 14.The roller is arranged in contact with the first guide element 46 of the upper carriage unit 14. The roller is arranged in contact with a driver element 34.

[0036] The rotary element 26 and the rotation element 32 are rotatably mounted relative to one another. The rotary element 26 and the rotation element 32 are arranged at least substantially parallel. The rotary element 26 and the rotation element 32 are rotatably mounted about a rotation axis 28.

[0037] The rotary element 26 and the rotation element 32 are arranged in contact on a side arranged at least substantially parallel to a main extension direction of the rotary element 28 and a side arranged at least substantially parallel to a main extension direction of the rotary element 26.

[0038] The rotary element 26 has a bulge 36, which is configured to limit a rotational movement between the rotary element 26 and the rotary element 32. The bulge 36 is formed on an outer radius of the rotary element 26. Alternatively, any other design of the bulge 36 that appears appropriate to a person skilled in the art is conceivable. The bulge 36 is configured to limit a rotational movement between the rotary element 26 and the rotary element 28 via the driver element 34. The bulge 36 is arranged at least substantially parallel to a rotary element 28. The bulge 36 is configured to correspond to a driver element 34. The bulge 36 is configured to engage with a driver element 34 in one operating step. (see Fig. 4 and Fig. 6)

[0039] The cutting device 10 has a holding element 38, which is configured to limit a movement of the rotary element 26. The holding element 38 is configured to limit a rotational movement of the rotary element 26. The holding element 38 is movably mounted on a rotary element 26. The holding element 38 is configured to be movably mounted with the rotary element 26 about a rotation axis 28. The holding element 38 has a drop-shaped cross-section, at least substantially parallel to a main extension direction of the rotary element 26. Alternatively, any other cross-section of the holding element 38 relative to a main extension direction of the rotary element 26 that appears appropriate to a person skilled in the art is conceivable. The handle unit 12 has a stop element 56, which is configured to limit a rotational movement of the rotary element 26. The stop element 56 is configured to correspond to a holding element 38.The stop element 56 is configured to limit a rotational movement of the rotary element 26 relative to a handle unit 12 in one operating step. The stop element 56 is formed as one piece, in particular integrally, with the handle unit 12. The stop element 56 is formed on the handle unit 12 in a vicinity of the rotary element 26. In one operating step, the holding element 38 engages in the stop element 56. By engaging the holding element 38 in the stop element 56, a counterclockwise rotational movement of the rotary element 26 is limited. (see . Fig. 5)

[0040] Fig. 2 shows a method for operating a cutting device 10 according to the invention, in particular a pipe cutting device. In a locking step 40, the upper slide unit 14 is locked relative to the lower slide unit 16. In the locking step 40, the upper slide unit 14 is firmly locked relative to a lower slide unit 16. In the locking step 40, a cylindrical component, in particular a pipe, is fixed between the lower slide unit 16 and the upper slide unit 14. In the locking step 40, the upper slide unit 14 is variably fixed relative to the lower slide unit 16. In the locking step 40, the upper slide unit 14 is locked relative to a lower slide unit 16 depending on a diameter of the cylindrical component.In the locking step 40, a cylindrical component, in particular a pipe, is fixed between a cutting element 18 of the upper slide unit 14 and the holding unit 20 of the lower slide unit 16. In the locking step 40, a cylindrical component, in particular a pipe, is mounted so as to be movable about rotation between a cutting element 18 of the upper slide unit 14 and the holding unit 20 of the lower slide unit 16. (see . Fig. 3, Fig. 1) and 2))

[0041] In a locking step 40, the frictional engagement element 24 displaces the upper slide unit 14 linearly against the lower slide unit 16 by means of a rotational movement of the rotation element 32. In the locking step 40, the upper slide unit 14 and the lower slide unit 16 are mounted linearly relative to one another. In the locking step 40, the upper slide unit 14 is displaced linearly depending on a diameter of the cylindrical component, in particular a tube. In the locking step 40, a rotational movement of the rotation element 32 is converted into a linear movement of the upper slide unit 14 to a lower slide unit 16. In the locking step 40, the linear movement of the upper slide unit 14 to a lower slide unit 16 is limited by a lateral surface of the cylindrical component, in particular a tube.In the locking step 40, the upper slide unit 14 is locked relative to a lower slide unit 16 by a clockwise rotational movement of the rotation element 32. In the locking step 40, the upper slide unit 14 is moved linearly in the direction of a lower slide unit 16 by a clockwise rotational movement of the rotation element 32. In particular, it is conceivable that in the locking step 40, the upper slide unit 14 is moved linearly relative to a lower slide unit 16 by a counterclockwise rotational movement of the rotation element 32. Alternatively, it is conceivable that in the locking step 40, the upper slide unit 14 is moved linearly in the direction of a lower slide unit 16 by a counterclockwise rotational movement of the rotation element 32 (see . Fig. 3, Fig. 1) and 2)).

[0042] In a locking step 40, the driver element 34 converts a rotary movement of the rotary element 32 via the frictional engagement element 24 into a linear movement. In the locking step 40, by means of the driver element 34, a rotary movement of the rotary element 32 is converted via the frictional engagement element 24 into a linear movement of the upper carriage unit 14 to a lower carriage unit 16. In the locking step 40, by means of the driver element 34, a rotary movement of the rotary element 32 via the roller is converted into a linear movement of the upper carriage unit 14. In the locking step 40, a rotary movement of the rotary element 32 is transmitted via the driver element 34 to the frictional engagement element 24. In the locking step 40, the frictional engagement element 24, in particular the roller, is guided along an outer edge of the driver element 34 by the rotational movement of the rotation element 32.In the locking step 40, the upper carriage unit 14 is moved linearly towards a lower carriage unit 16 by a frictional force generated between the driver element 34 and the frictional engagement element 24. In the locking step 40, a further frictional force between the frictional engagement element 24 and the upper carriage unit 14 converts a rotary movement of the frictional engagement element 24 into a linear movement of the upper carriage unit 14. In the locking step 40, the rotary movement of the driver element 34 moves the frictional engagement element 24, in particular the roller, in the direction of the rotational axis 28 of the rotational element 32. In the locking step 40, the rotary movement transmitted to the frictional engagement element 24 is transmitted to the upper carriage unit 14, wherein the rotary movement is converted into a linear movement towards a lower carriage unit 16.In the locking step 40, the linear movement is stopped as soon as the upper carriage unit 14 with the cutting element 18 hits the outer surface of the cylindrical component, in particular the pipe. In the locking step 22, a rotary movement of the rotary element 32 in a clockwise direction is converted into a linear movement via the frictional engagement element 24 (see ). Fig. 3, Fig. 1) and 2) and Fig. 4).

[0043] In a processing step 42, the locking of the cylindrical component, in particular a pipe, between an upper slide unit 14 and a lower slide unit 16 is maintained via the spring force of the frictional engagement element 24. In the processing step 42, a spring force of the frictional engagement element 32 to a driver element 34 and the upper slide unit 14 is maintained, so that the locking of the upper slide unit 14 to a lower slide unit 16 is maintained. In a processing step 42, the spring force is generated by the rotary movement of the rotary element 32 through the frictional force between a frictional engagement element 24 and the driver element 34. In the processing step 42, a locking is maintained throughout the entire duration of the processing.In processing step 42, a cutting element 18 of the upper slide unit 14 is guided in rotation on a lateral surface of the cylindrical component, in particular a pipe, around the cylindrical component, in particular a pipe. In particular, it is conceivable that in a processing step 42, the locking unit 22 has a spring element which alternatively and / or additionally maintains a locking of the upper slide unit 14 to a lower slide unit 16. (see . Fig. 3, Fig. 3) and 4))

[0044] In a processing step 42, a rotational movement is transferred from a rotational element 32 to a rotary element 26 due to the frictional engagement between the frictional engagement element 24 and the driver element 34. In the processing step 42, a rotational movement is transferred from a rotational element 32 to a rotary element 26 as soon as the upper slide unit 14 hits the outer surface of the cylindrical component, in particular a tube, and locking of the upper slide unit 14 to a lower slide unit 16 is completed. In the processing step 42, the rotational movement is transferred from the rotary element 32 to the rotary element 26 via the frictional force between the frictional engagement element 24 and the driver element 34. In a processing step 42, the rotary element 32 and the rotary element 26 have an identical rotational speed.The rotary movement transmitted via the frictional engagement element 24 and the driver element 34 guides the cutting element 18 of the upper slide unit 14 around the cylindrical component, in particular the pipe. In a processing step 42, a cutting element 18 of the upper slide unit 14 is guided around the cylindrical component at least substantially perpendicular to a main extension direction of the cylindrical component, in particular the pipe (see . Fig. 3, Fig. 3) and 4)).

[0045] In a release step 44, a rotational movement opposite to that in a locking step 40 and a processing step 42 is performed, wherein a bulge 36 of the rotary element 26 limits a rotational movement between the rotary element 26 and the rotary element 32. In the release step 44, a rotational movement of the rotary element 32 is reversed by means of the drive unit 30. In a release step 44, the rotational movement of the drive unit 30 is reversed by means of the control and regulating unit 52 compared to that in a locking step 40 and a processing step 42. In a release step 44, a rotational movement of the rotary element 32 is performed counterclockwise. In a release step 44, the opposite rotation of the rotary element 32 cancels out a frictional engagement between a frictional engagement element 24, in particular a roller, and a driver element 34.In a release step 44, the contact between a frictional engagement element 24, in particular a roller, and a driver element 34 is released by the opposing rotation of the rotating element 32, whereby the locking of the upper carriage unit 14 to a lower carriage unit 16 is released. In the release step 44, an opposing rotational movement of the rotating element 32 is transmitted to the rotating element 26. In the release step 44, an opposing rotational movement of the rotating element 32 is transmitted to the rotating element 26 via the driver element 34 and the bulge 36 of the rotating element 26. In the release step 44, the bulge 36 of the rotating element 26 strikes the driver element 34 during an opposing rotational movement of the rotating element 32, whereby an opposing rotational movement of the rotating element 32 is transmitted to the rotating element 26.Alternatively, it is conceivable that the rotation element 32 has another stop, which appears to be useful to a person skilled in the art, against which the bulge 36 of the rotary element 26 strikes in order to transmit an opposite rotary movement of the rotation element 32 to the rotary element 26 (see . Fig. 3, Fig. 5) and 6)).

[0046] In a release step 44, an opposite rotary movement is performed as in a locking step 40 and a processing step 42, wherein a holding element 38 suspends the transmission of a rotary movement from a rotary element 32 to a rotary element 26 and resets the cutting device 10 to an initial state. In the release step 44, an opposite rotary movement from a rotary element 32 to a rotary element 26 is suspended as soon as the holding element 38 encounters a stop of the handle unit 12. In the release step 44, the holding element 38 encounters the stop of the handle unit 12 due to the opposite rotary movement of the rotary element 26. In the release step 44, contact between the driver element 34 and the bulge 36 of the rotary element 26 is released as soon as the holding element 38 encounters a stop of the handle unit 12.In the release step 44, the rotating element 26 is fixed in an initial state by the stop of the holding element 38 against the stop of the handle unit 12. In particular, it is conceivable that in a release step 44, the rotating element 32 is stopped in an initial state by regulating the rotational movement of the drive unit 30 (see . Fig. 3, Fig. 7)).

Claims

[1] Cutting device (10), in particular a pipe cutting device, with at least one handle unit (12), with at least one upper slide unit (14) and at least one lower slide unit (16), wherein the upper slide unit (14) has a cutting element (18) and the lower slide unit (16) has at least one holding unit (20), wherein the upper slide unit (14) is mounted so as to be movable relative to the lower slide unit (16), and with at least one locking unit (22) which is designed to lock the upper slide unit (14) relative to the lower slide unit (16), characterized by that the locking unit (22) has a frictional engagement element (24) by means of which the locking of the locking unit (22) takes place. [2] Cutting device (10) according to claim 1, characterized by, a rotating element (26) which is adapted to rotate the upper slide unit (14) and the lower slide unit (16) about a rotation axis (28). [3] Cutting device (10) according to claim 1 or 2, characterized by , a drive unit (30) and a rotation element (32), wherein the drive unit (30) drives the rotation element (32) in a rotational movement. [4] Cutting device (10) according to one of the preceding claims, characterized by that the locking unit (22) has a driver element (34) which is fixedly arranged on the rotation element (32). [5] Cutting device (10) according to one of the preceding claims, characterized by that the frictional engagement element (24) is formed by a roller which is rotatably mounted and arranged in a vicinity of the upper slide unit (14). [6] Cutting device (10) according to one of the preceding claims, characterized bythat the rotary element (26) and the rotation element (32) are rotatably mounted relative to one another. [7] Cutting device (10) according to one of the preceding claims, characterized by that the rotary element (26) has a bulge (36) which is designed to limit a rotary movement between the rotary element (26) and the rotary element (32). [8] Cutting device (10) according to one of the preceding claims, characterized by , a holding element (38) which is adapted to limit a movement of the rotary element (26). [9] Method for operating a cutting device (10) according to the invention, in particular a pipe cutting device, characterized by that in a locking step (40) the upper slide unit (14) is locked to the lower slide unit (16). [10] Method according to claim 9, characterized bythat in a locking step (40) the frictional engagement element (24) displaces the upper slide unit (14) linearly against the lower slide unit (16) by a rotary movement of the rotary element (32). [11] Method according to claim 9, characterized by that in a locking step (40) the driver element (34) converts a rotary movement of the rotary element (32) into a linear movement via the frictional engagement element (24). [12] Method according to claim 9, characterized by that in a processing step (42) the locking of the cylindrical component, in particular a tube, between an upper slide unit (14) and a lower slide unit (16) is maintained via the spring force of the frictional engagement element (24). [13] Method according to claim 9, characterized bythat in a processing step (42) a rotary movement is transferred from a rotary element (32) to a rotary element (26) by the frictional engagement between the frictional engagement element (24) and the driver element (34). [14] Method according to claim 9, characterized by in that in a release step (44) an opposite rotary movement is carried out than in a locking step (40) and a machining step (42), wherein a bulge (36) of the rotary element (26) limits a rotary movement between the rotary element (26) and the rotary element (32). [15] Method according to claim 9, characterized byin that in a release step (44) an opposite rotary movement is carried out than in a locking step (40) and a processing step (42), wherein a holding element (38) suspends a transmission of a rotary movement from a rotary element (32) to a rotary element (26) and resets the cutting device (10) to an initial state.

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