Laboratory mill

Abstract

The invention describes a laboratory mill for comminuting grinding stock, with a grinding container (10) which is arranged on a grinding body, a grinding tool (20) which is arranged in the grinding container (10), and a drive (40) which has a contactless magnetic coupling (42) for transferring a torque to the grinding tool (20), wherein the contactless magnetic coupling (42) couples the grinding tool (20) to drive components of the drive (40) arranged outside the grinding container (10) in a contactless manner.

Description

[0001] Laboratory mill

[0002] Technical area

[0003] In this case, reference is made to a laboratory mill for comminuting a material to be ground.

[0004] State of the art

[0005] Electrically driven laboratory mills are known from the prior art and are used for comminuting a material to be ground in a laboratory. In such prior art laboratory mills, a grinding tool is connected to an electric drive via a shaft to drive the grinding tool in rotation. For this purpose, it is also known to provide a shaft passage through the bottom of a grinding container, through which the shaft is guided.

[0006] Description of the invention

[0007] One aspect concerns a laboratory mill for comminuting a material to be ground. The material to be ground can be, for example, organic or inorganic material.

[0008] The laboratory mill has a grinding container, which can be arranged on a mill body. The laboratory mill can be operated with various grinding containers. The grinding container can therefore be an interchangeable grinding container. The grinding container can be removably arranged on the mill body. The mill body can be designed as a mill base. The laboratory mill can be designed as a tabletop unit, wherein the mill body can be arranged upright on a laboratory table. The laboratory mill can also be designed as a freestanding unit, wherein the mill body can be arranged freestanding.

[0009] According to one embodiment of the laboratory mill, the grinding container can have a stationary position on the mill body during grinding operation of the laboratory mill. The grinding container can therefore be a stationary grinding container that is arranged stationary on the mill body during grinding operation.

[0010] The laboratory mill has a grinding tool that can be arranged in the grinding container. The grinding tool can be a comminution tool for comminuting the material to be ground. The laboratory mill can be operated with various grinding tools for comminuting the material to be ground. The grinding tool can therefore be an interchangeable grinding tool. The grinding tool can, for example, be a cutting tool, a knife tool, a rotor tool, an impact tool, an impact tool, a shearing tool, or a ball tool. The laboratory mill can therefore be operated as at least one of a cutting mill, a knife mill, a rotor mill, an impact rotor mill, a centrifugal mill, a grinding media mill, and a ball mill.

[0011] The laboratory mill has a drive with a contactless magnetic coupling for transmitting torque to the grinding tool during grinding operation of the laboratory mill. The drive can be an electric drive. The contactless magnetic coupling non-contactingly couples the grinding tool to drive components of the electric drive arranged outside the grinding container. The contactless magnetic coupling can have a drive side and an output side, which can be designed as magnetic coupling halves. If the drive side is magnetically coupled to the output side during grinding operation, the contactless magnetic coupling can be configured to transmit a torque from the drive side, which can be provided by the electric drive, to the output side.The contactless magnetic coupling can provide a magnetic coupling that provides a magnetic force required for the torque to be transmitted.

[0012] The drive components arranged outside the grinding container can comprise at least one of an electric motor and a shaft for driving the drive side of the contactless magnetic coupling. The drive components arranged outside the grinding container can comprise the drive side of the contactless magnetic coupling. Alternatively, the drive components arranged outside the grinding container can be rotationally fixedly connected to the drive side of the contactless magnetic coupling. The grinding tool can comprise the output side of the contactless magnetic coupling. Alternatively, the grinding tool can be rotationally fixedly connected to the output side of the contactless magnetic coupling. The drive side and the output side of the contactless magnetic coupling can each comprise a plurality of magnets, i.e., at least two magnets, which can be magnetically coupled in pairs. The magnets can be permanent magnets.

[0013] According to one embodiment of the laboratory mill, the grinding tool can be mounted on an axle, which can have a stationary position in the grinding container during grinding operation. The grinding tool can have the axle. The grinding tool can be rotatably mounted on the axle, wherein the grinding tool can be mounted on the axle via at least one ball bearing. During grinding operation, the grinding tool can rotate in the grinding container with a fixed axle, wherein the torque for generating rotation of the grinding tool can be transmitted from the electric motor to the grinding tool via the contactless magnetic coupling. The stationary position of the axle can be a fixed position in the grinding container and relative to the grinding container. During grinding operation, the axle can have a stationary position and a stationary orientation during grinding operation.

[0014] With the invention, the grinding tool arranged in the grinding container can be rotatably operated about the stationary axis. With the contactless magnetic coupling, a shaft feedthrough through the grinding container for rotating the grinding tool can be obsolete. The contactless magnetic coupling can therefore be configured for the contactless transmission of torque to the grinding tool through a closed grinding container. The invention can thus provide a contactless grinding tool drive. Furthermore, the invention can improve an electric drive for the laboratory mill.

[0015] According to one embodiment of the laboratory mill, the stationary position of the axis in the grinding container can be established by a magnetic force. The magnetic force can be provided by the contactless magnetic coupling during grinding operation. The stationary position of the axis can correspond to a coupling axis of the contactless magnetic coupling. The stationary position of the axis can correspond to a common coupling axis of the drive side and the output side of the contactless magnetic coupling. The stationary position of the axis can be established by a magnetic coupling between the drive side and the output side when the grinding container is arranged on the mill body.The stationary position of the axis can thus be based on the magnetic coupling, without the axis being radially guided on a container bottom and / or a container lid of the grinding container to achieve the stationary position. The axis can therefore be designed to be mechanically guideless, in particular radially guideless, on the container bottom and / or the container lid. The grinding tool can therefore be a grinding tool that can be set up automatically, which allows for particularly efficient commissioning of the laboratory mill.

[0016] According to a further embodiment of the laboratory mill, the contactless magnetic coupling can have a drive side and an output side, which have a plurality of magnetically connectable permanent magnet pairs. The drive side and the output side of the contactless magnetic coupling can each have a plurality of permanent magnets, i.e., at least two permanent magnets, which, in pairs, form the plurality of permanent magnet pairs, i.e., at least two permanent magnet pairs. The permanent magnet pairs can jointly provide the magnetic force by which the torque can be transmitted to the grinding tool during grinding operation. With a paired magnetic coupling, the permanent magnet pairs are thus configured to transmit a drive torque provided by the electric drive on the drive side to a corresponding output torque on the output side for driving the grinding tool.The permanent magnet pairs can jointly provide the magnetic force by which the stationary position of the axis in the grinding container can be adjusted. The laboratory mill can thus have a contactless torque transmission to the grinding tool, which can be provided in a particularly transmission-efficient manner with the magnetic coupling. According to a further embodiment of the laboratory mill, the grinding container can have a flat bottom surface on which or adjacent to which the grinding tool can be arranged. The flat bottom surface can delimit a grinding chamber in which the grinding tool can be arranged adjacent to the flat bottom surface. The flat bottom surface can be arranged between the drive side and the output side of the contactless magnetic coupling, wherein the contactless magnetic coupling can couple the grinding tool to the drive components arranged outside the grinding container without contact via the flat bottom surface.The flat base surface can be designed without radial guides for the axis. This flat base surface can improve the compatibility of the grinding container with various grinding tools. Furthermore, cleaning the grinding container can be simplified.

[0017] According to a further embodiment of the laboratory mill, the grinding container can have a closed container bottom. The closed container bottom can have the flat bottom surface on which or adjacent to which the grinding tool can be arranged. The closed container bottom can be designed without any passage, in particular for a drive shaft. The grinding container can thus be designed to be hermetically sealed.

[0018] According to one embodiment, the closed container base can comprise a non-magnetizable material. The material can be a non-ferromagnetic material. The closed container base can be designed to be seamless, wherein the closed container base can be designed to be seamless, in particular for a drive shaft. The grinding container can thus be designed to be hermetically sealed. The material can be a ceramic material, which can comprise at least one ceramic material from which the closed container base can be made, at least in part. The grinding container can thus have a non-magnetizable container base. The magnetic coupling of the drive side and the output side of the contactless magnetic coupling can be formed by the closed container base.The magnetic coupling between the drive and output sides of the contactless magnetic coupling can be made of a non-magnetizable material. This non-magnetizable material can advantageously have only a minimal impact on the magnetic coupling.

[0019] According to a further embodiment, the base plate can comprise or consist of the non-magnetizable material. The flat base surface can therefore be a flat base surface formed from a base plate made of the non-magnetizable material. With this embodiment, a magnetic coupling for contactless driving of the grinding tool via the closed container base can be provided in an efficient manner. Due to the non-magnetizable material of the closed container base, the magnetic coupling and the magnetic force resulting from the magnetic coupling can be established via the closed container base without the non-magnetizable material influencing the magnetic coupling and the magnetic force in such a way that a torque of the grinding tool required for grinding operation cannot be transmitted with the contactless magnetic coupling.

[0020] According to a further embodiment of the laboratory mill, the closed container bottom can be made of the non-magnetizable material. Between the drive side and the output side of the contactless magnetic coupling, a region of the container bottom can thus be formed which is made of the non-magnetizable material, in particular only of the non-magnetizable material. The magnetic coupling with the magnetic force can thus be influenced to a particularly small extent during the grinding operation of the laboratory mill.

[0021] According to a further embodiment of the laboratory mill, the grinding container can have a container lid on which the axle is mounted. The axle can be mounted radially and / or axially on the container lid. The axle can be guided radially and / or axially on the container lid. The axle can thus be mounted or guided on a side of the grinding container facing away from the drive or on a side of the grinding container opposite the flat bottom surface. The axle can be mounted on the container lid in such a way that the axle has an initial position or a rough position in the grinding container before the grinding operation, in which the magnetic coupling is set up. The initial position or the rough position of the axle can be transferred into the stationary position of the axle by the magnetic coupling set up during grinding operation. The stationary position of the axle can thus be set up automatically when setting up the laboratory mill.

[0022] According to a further embodiment of the laboratory mill, the grinding tool can be arranged in the grinding container so that it can be replaced without tools. The grinding tool can be exchanged with another grinding tool without tools. The grinding tool can be arranged manually in the grinding container. The grinding tool can be exchanged without tools at the axis or together with the axis without tools. The grinding tool can thus be an exchangeable operating module of the laboratory mill, whereby the contactless magnetic coupling of the grinding tool to the electric motor allows for a modular design of the laboratory mill to be provided in a particularly efficient manner.

[0023] Alternatively or in addition to the preceding embodiment of the laboratory mill, according to a further embodiment, the grinding container can be arranged on the mill body in a tool-free, interchangeable manner. The grinding container can be interchangeable with another grinding container without the need for tools. The grinding container can be manually arranged on the mill body, and the grinding container can be manually locked to the mill body. The grinding container can thus be another interchangeable operating module of the laboratory mill, with the modularity of the laboratory mill being further improved by the contactless magnetic coupling of the grinding tool to the electric motor.

[0024] According to a further embodiment of the laboratory mill, it can have an adjusting mechanism, in particular a manually operable adjusting mechanism, for engaging and disengaging the contactless magnetic coupling. The adjusting mechanism can be configured to engage and / or disengage the drive side and the output side of the contactless magnetic coupling. The adjusting mechanism can be configured to couple the drive side to the output side. The adjusting mechanism can be configured to move the drive side closer to the output side in order to establish the magnetic coupling. The adjusting mechanism can be configured to disengage the drive side from the output side. The adjusting mechanism can be configured to move the drive side away from the output side in order to disengage the magnetic coupling.The magnetic coupling can thus be set up for grinding operation and released for manual intervention after grinding operation by a user of the mill in order to improve the operational reliability of the mill during and after grinding operation.

[0025] According to a further embodiment of the laboratory mill, the adjusting mechanism can be an adjusting mechanism for engaging and disengaging the contactless magnetic coupling. The adjusting mechanism can be a manually operable adjusting mechanism. The adjusting mechanism can be configured to mechanically engage and disengage the contactless magnetic coupling. The adjusting mechanism can be configured to mechanically move the drive side closer to the output side, or vice versa, in order to engage the magnetic coupling. The adjusting mechanism can also be configured to mechanically move the drive side away from the output side, or vice versa, in order to disengage the magnetic coupling. With such a separated magnetic coupling, residual magnetic forces may still be effective, but these are negligible or insufficient for transmitting the torque to the grinding tool.The operational safety of the mill can thus be reliably improved during and after grinding operations.

[0026] According to a further embodiment of the laboratory mill, the adjustment mechanism can be used to actuate the engagement of the contactless magnetic coupling by manually attaching the grinding container to the mill body. The attachment can be or comprise a locking action. According to yet another embodiment of the laboratory mill, the adjustment mechanism can be used to actuate the disengagement of the contactless magnetic coupling by manually removing the grinding container from the mill body. The removal can be or comprise a release action.

[0027] According to a further embodiment of the laboratory mill, the adjusting mechanism can comprise an adjusting body on which the drive side and / or the output side of the contactless magnetic coupling is movably mounted. The adjusting body can be mechanically actuated to engage and disengage the contactless magnetic coupling. The adjusting body can be actuated by manually attaching and / or manually removing the grinding container. The drive side and / or the output side of the contactless magnetic coupling can be arranged in the adjusting body so that they can be moved translationally.

[0028] According to a further embodiment of the laboratory mill, the contactless magnetic coupling can be pivotably mounted on the mill body. According to yet another embodiment of the laboratory mill, the grinding container can be pivotably mounted on the mill body. In addition, the electric drive can also be pivotably mounted on the mill body. The electric drive, the contactless magnetic coupling, and the grinding container can thus be pivotably mounted together on the mill body. The laboratory mill can thus be operated in a grinding mode in which the grinding container with the grinding tool arranged therein can be operated at an angle. The laboratory mill can thus be operated, for example, in a continuous grinding mode. The position of the axis, which is stationary in the grinding container during grinding mode, can therefore also have a spatially inclined position.

[0029] Further embodiments are described below. Embodiments of the laboratory mill according to this aspect may be corresponding embodiments of the laboratory mill according to another aspect.

[0030] According to one embodiment, a laboratory mill for comminuting a material to be ground, comprising a grinding container which is arranged on a mill body, a grinding tool which is arranged in the grinding container, and a drive which has a contactless magnetic coupling for transmitting a torque to the grinding tool during a grinding operation of the laboratory mill, wherein the contactless magnetic coupling couples the grinding tool to drive components of the drive arranged outside the grinding container in a contactless manner, and wherein the grinding tool is preferably mounted on an axis which has a stationary position in the grinding container during the grinding operation.

[0031] According to a further embodiment, the laboratory mill comprises a stationary position of the axis in the grinding container, which is established by a magnetic force provided by the contactless magnetic coupling during grinding operation. According to a further embodiment, the laboratory mill comprises a drive side and an output side, which have a plurality of magnetically connectable permanent magnet pairs. According to a further embodiment, the laboratory mill comprises a stationary position on the mill body during grinding operation of the laboratory mill.

[0032] According to a further embodiment, the laboratory mill, wherein the grinding container has a flat bottom surface on which the grinding tool is arranged. According to a further embodiment, the laboratory mill, wherein the grinding container has a closed container bottom. According to a further embodiment, the laboratory mill, wherein the closed container bottom comprises a non-magnetizable material, in particular a ceramic material. According to a further embodiment, the laboratory mill, wherein the grinding container has a container lid on which the axis is mounted. According to a further embodiment, the laboratory mill, wherein the grinding tool and / or the grinding container is arranged in the grinding container so that it can be exchanged without tools.

[0033] According to a further embodiment, the laboratory mill comprises an adjusting mechanism for engaging and disengaging the contactless magnetic coupling. According to a further embodiment, the laboratory mill comprises a manually operable adjusting mechanism for engaging and disengaging the contactless magnetic coupling. According to a further embodiment, the laboratory mill comprises a manually operable adjusting mechanism for engaging and disengaging the contactless magnetic coupling. According to a further embodiment, the laboratory mill comprises a manually operable adjusting mechanism for engaging the contactless magnetic coupling by manually attaching the grinding container to the mill body. According to a further embodiment, the laboratory mill comprises a manually operable adjusting mechanism for disengaging the contactless magnetic coupling by manually removing the grinding container from the mill body. According to a further embodiment, the laboratory mill comprises a manually operable adjusting mechanism for disengaging the contactless magnetic coupling by manually removing the grinding container from the mill body.According to a further embodiment, the laboratory mill comprises a grinding container pivotably mounted on the mill body. Another aspect relates to comminuted ground material produced with a laboratory mill according to the preceding aspect. The comminuted ground material can be removed from the grinding container after the grinding operation. Alternatively or additionally, the comminuted ground material can be discharged from the grinding container during the grinding operation.

[0034] Another aspect concerns a laboratory mill for grinding a material. The material to be ground can be, for example, organic or inorganic material.

[0035] The laboratory mill has a grinding container, which can be arranged on a mill body. The laboratory mill can be operated with various grinding containers. The grinding container can therefore be an interchangeable grinding container. The grinding container can be removably arranged on the mill body. The mill body can be designed as a mill base. The laboratory mill can be designed as a tabletop unit, wherein the mill body can be arranged upright on a laboratory table. The laboratory mill can also be designed as a freestanding unit, wherein the mill body can be arranged freestanding.

[0036] The laboratory mill has a grinding tool that can be arranged in the grinding container. The grinding tool can be a comminution tool for comminuting the material to be ground. The laboratory mill can be operated with various grinding tools for comminuting the material to be ground. The grinding tool can therefore be an interchangeable grinding tool. The grinding tool can, for example, be a cutting tool, a knife tool, a rotor tool, an impact tool, an impact tool, a shearing tool, or a ball tool. The laboratory mill can therefore be operated as at least one of a cutting mill, a knife mill, a rotor mill, an impact rotor mill, a centrifugal mill, a grinding media mill, and a ball mill.

[0037] The laboratory mill can have a drive with a contactless magnetic coupling for transmitting a torque to the grinding tool during grinding operation of the laboratory mill. The drive can be an electric drive. The contactless magnetic coupling couples the grinding tool to drive components of the electric drive arranged outside the grinding container in a contactless manner. The contactless magnetic coupling can have a drive side and an output side, which can be designed as magnetic coupling halves. If the drive side is magnetically coupled to the output side during grinding operation, the contactless magnetic coupling can be configured to transmit a torque from the drive side, which can be provided by the electric drive, to the output side.The contactless magnetic coupling can provide a magnetic coupling that provides a magnetic force required for the torque to be transmitted.

[0038] The drive components arranged outside the grinding container can comprise at least one of an electric motor and a shaft for driving the drive side of the contactless magnetic coupling. The drive components arranged outside the grinding container can comprise the drive side of the contactless magnetic coupling. Alternatively, the drive components arranged outside the grinding container can be rotationally fixedly connected to the drive side of the contactless magnetic coupling. The grinding tool can comprise the output side of the contactless magnetic coupling. Alternatively, the grinding tool can be rotationally fixedly connected to the output side of the contactless magnetic coupling. The drive side and the output side of the contactless magnetic coupling can each comprise a plurality of magnets, i.e., at least two magnets, which can be magnetically coupled in pairs. The magnets can be permanent magnets.

[0039] The grinding container has a closed container bottom made of a ceramic material. The closed container bottom can be designed to be seamless, particularly for a drive shaft. The grinding container can thus be designed to be hermetically sealed. The ceramic material comprises a ceramic material from which the closed container bottom is made, at least in part. The grinding container can thus have a ceramic container bottom. The magnetic coupling of the drive side and the output side of the contactless magnetic coupling can be formed by the closed container bottom. The magnetic coupling of the drive side and the output side of the contactless magnetic coupling can be formed by the ceramic material. The ceramic material can advantageously have only a minimal influence on the magnetic coupling.

[0040] The invention efficiently provides a magnetic coupling for contactless driving of the grinding tool via the closed container bottom. The ceramic material of the closed container bottom allows the magnetic coupling, or the magnetic force resulting from the magnetic coupling, to be established via the closed container bottom without the ceramic material influencing the magnetic coupling or the magnetic force to such an extent that the torque of the grinding tool required for grinding operation cannot be transmitted with the contactless magnetic coupling. Furthermore, the invention can improve an electric drive for the laboratory mill.

[0041] According to one embodiment of the laboratory mill, the ceramic material can comprise zirconium dioxide. Zirconium dioxide can be the material also referred to as zirconium oxide. The ceramic material can comprise zirconium dioxide as a ceramic material. The invention is based on the finding that zirconium dioxide influences the magnetic coupling or the magnetic force during the grinding operation of the laboratory mill to a particularly lesser extent.

[0042] According to a further embodiment of the laboratory mill, the closed container base can be made of the ceramic material. A region of the container base made of the ceramic material, in particular solely of the ceramic material, can thus be formed between the drive part and the driven part of the contactless magnetic coupling. The closed container base can be made of zirconium dioxide. The region of the closed container base arranged between the drive part and the driven part of the contactless magnetic coupling can thus be made of zirconium dioxide, in particular solely of zirconium dioxide. The magnetic coupling or the magnetic force can thus be influenced to a particularly lesser extent during the grinding operation of the laboratory mill.According to a further embodiment of the laboratory mill, the closed container base can have a flat bottom surface on which or adjacent to which the grinding tool can be arranged. The flat bottom surface can delimit a grinding chamber in the grinding container, in which the grinding tool can be arranged adjacent to the flat bottom surface. The flat bottom surface can thus be a bottom surface facing the grinding tool. The grinding tool can be arranged on the flat bottom surface. The flat bottom surface can be formed on a bottom plate of the closed container base. The bottom plate can comprise the ceramic material or consist of the ceramic material. The flat bottom surface can therefore be a flat bottom surface formed on a bottom plate made of zirconium dioxide. According to one embodiment, the zirconium dioxide bottom plate can have a thickness of 2 mm to 4 mm, in particular a thickness of 3 mm.

[0043] The flat base surface can be arranged between the drive side and the output side of the contactless magnetic coupling, whereby the contactless magnetic coupling can connect the grinding tool to the drive components arranged outside the grinding container without contact via the flat base surface. The flat base surface can be designed to be radially guideless for the axis. The flat base surface can improve the compatibility of the grinding container with various grinding tools. Furthermore, the flat base surface can simplify cleaning of the grinding container.

[0044] According to a further embodiment of the laboratory mill, the grinding container can have a stationary position on the mill body during grinding operation of the laboratory mill. The grinding container can therefore be a stationary grinding container that is arranged stationary on the mill body during grinding operation.

[0045] According to a further embodiment of the laboratory mill, the grinding tool can be mounted on an axle which, during grinding operation of the laboratory mill, has a stationary position in the grinding container. The grinding tool can have the axle. The grinding tool can be rotatably mounted on the axle, wherein the grinding tool can be mounted on the axle via at least one ball bearing. During grinding operation, the grinding tool can rotate in the grinding container, wherein the torque for generating rotation of the grinding tool can be transmitted from the electric motor to the grinding tool via the contactless magnetic coupling. The stationary position of the axle can be a fixed position in the grinding container and relative to the grinding container. During grinding operation, the axle can have a stationary position and a stationary orientation.

[0046] According to the preceding embodiment of the laboratory mill, the stationary position of the axis in the grinding container can be established by a magnetic force. The magnetic force can be provided by the contactless magnetic coupling during grinding operation. The stationary position of the axis can correspond to a coupling axis of the contactless magnetic coupling. The stationary position of the axis can correspond to a common coupling axis of the drive side and the output side of the contactless magnetic coupling. The stationary position of the axis can be established by a magnetic coupling between the drive side and the output side when the grinding container is arranged on the mill body.The stationary position of the axis can thus be based on the magnetic coupling, without the axis being centered on a container bottom and / or container lid of the grinding container to achieve the stationary position. The axis can therefore be stationary on the container bottom and / or the container lid without mechanical guidance. The grinding tool can therefore be a grinding tool that can be set up automatically, which allows for particularly efficient commissioning of the laboratory mill.

[0047] With this embodiment, the grinding tool arranged in the grinding container can be rotated about the stationary axis, whereby the contactless magnetic coupling eliminates the need for a shaft through the grinding container for rotating the grinding tool. The contactless magnetic coupling can therefore be configured for the contactless transmission of torque to the grinding tool through a closed grinding container. This embodiment can thus provide a contactless grinding tool drive. According to a further embodiment of the laboratory mill, the contactless magnetic coupling can have a drive side and an output side, which have a plurality of magnetically connectable permanent magnet pairs.The drive side and the output side of the contactless magnetic coupling can each have a plurality of permanent magnets, i.e., at least two permanent magnets, which, in pairs, form the plurality of permanent magnet pairs, i.e., at least two permanent magnet pairs. The permanent magnet pairs can jointly provide the magnetic force by which the torque can be transmitted to the grinding tool during grinding operation. With a paired magnetic coupling, the permanent magnet pairs are thus configured to transmit a drive torque provided by the electric drive on the drive side to a corresponding output torque on the output side for driving the grinding tool. The permanent magnet pairs can jointly provide the magnetic force by which the stationary position of the axis in the grinding container can be adjusted.The laboratory mill can thus have a contactless torque transmission to the grinding tool, which can be provided in a particularly transmission-efficient manner with the magnetic coupling.

[0048] According to a further embodiment of the laboratory mill, the grinding container can have a container lid on which the axle is mounted. The axle can be mounted radially and / or axially on the container lid. The axle can be guided radially and / or axially on the container lid. The axle can thus be mounted or guided on a side of the grinding container facing away from the drive or on a side of the grinding container opposite the flat bottom surface. The axle can be mounted on the container lid in such a way that the axle has an initial position or rough position in the grinding container before grinding operation, in which the magnetic coupling is set up. The initial position or rough position of the axle can be transferred into the stationary position of the axle by the magnetic coupling set up during grinding operation. The stationary position of the axle can thus be set up automatically when setting up the laboratory mill.According to a further embodiment of the laboratory mill, the grinding tool can be arranged in the grinding container so that it can be replaced without tools. The grinding tool can be exchanged with another grinding tool without tools. The grinding tool can be arranged manually in the grinding container. The grinding tool can be exchanged on the axis without tools or with the axis without tools. The grinding tool can thus be an exchangeable operating module of the laboratory mill, whereby the contactless coupling of the grinding tool to the electric motor allows for a modular design of the laboratory mill to be provided in a particularly efficient manner.

[0049] According to a further embodiment of the laboratory mill, the grinding container can be arranged on the mill body so that it can be exchanged without tools. The grinding container can be exchanged with another grinding container without tools. The grinding container can be manually arranged on the mill body, and the grinding container can be manually locked to the mill body. The grinding container can thus be another exchangeable operating module of the laboratory mill, with the modularity of the laboratory mill being further improved by the contactless coupling of the grinding tool to the electric motor.

[0050] According to a further embodiment of the laboratory mill, it can have an adjusting mechanism, in particular a manually operable adjusting mechanism, for engaging and disengaging the contactless magnetic coupling. The adjusting mechanism can be configured to engage and / or disengage the drive side and the output side of the contactless magnetic coupling. The adjusting mechanism can be configured to couple the drive part to the output part. The adjusting mechanism can be configured to move the drive part closer to the output part in order to establish the magnetic coupling. The adjusting mechanism can be configured to disengage the drive part from the output part. The adjusting mechanism can be configured to move the drive part away from the output part in order to disengage the magnetic coupling.The magnetic coupling can thus be set up for grinding operation and released by a mill user for manual intervention after grinding operation in order to improve the operational reliability of the mill during and after grinding operation. According to a further embodiment of the laboratory mill, the adjusting mechanism can be an adjusting mechanism for engaging and disengaging the contactless magnetic coupling. The adjusting mechanism can be a manually operable adjusting mechanism. The adjusting mechanism can be configured to mechanically engage and disengage the contactless magnetic coupling. The adjusting mechanism can be configured to mechanically move the drive part closer to the driven part or vice versa in order to establish the magnetic coupling. The adjusting mechanism can also be configured to mechanically move the drive part away from the driven part or vice versa in order to release the magnetic coupling.When the magnetic coupling is released, residual magnetic forces may still be present, but these are negligible or insufficient to transmit torque to the grinding tool. This reliably improves the operational reliability of the mill during and after grinding.

[0051] According to a further embodiment of the laboratory mill, the adjustment mechanism can be used to actuate the engagement of the contactless magnetic coupling by manually attaching the grinding container to the mill body. The attachment can be or comprise a locking action. According to yet another embodiment of the laboratory mill, the adjustment mechanism can be used to actuate the disengagement of the contactless magnetic coupling by manually removing the grinding container from the mill body. The removal can be or comprise a release action.

[0052] According to a further embodiment of the laboratory mill, the contactless magnetic coupling can be pivotably mounted on the mill body. According to yet another embodiment of the laboratory mill, the grinding container can be pivotably mounted on the mill body. In addition, the electric drive can also be pivotably mounted on the mill body. The electric drive, the contactless magnetic coupling, and the grinding container can thus be pivotably mounted together on the mill body. The laboratory mill can thus be operated in a grinding mode in which the grinding container with the grinding tool arranged therein can be operated at an angle. The laboratory mill can thus be operated, for example, in a continuous grinding mode. The position of the axis, which is stationary in the grinding container during grinding mode, can therefore also have a spatially inclined position.

[0053] Further embodiments are described below. Embodiments of the laboratory mill according to this aspect may be corresponding embodiments of the laboratory mill according to another aspect.

[0054] According to one embodiment, a laboratory mill for comminuting a material to be ground, comprising a grinding container arranged on a mill body, a grinding tool arranged in the grinding container, and a drive having a contactless magnetic coupling for transmitting a torque to the grinding tool, wherein the grinding container has a closed container bottom which has a ceramic material, and wherein the contactless magnetic coupling couples the grinding tool to drive components of the drive arranged outside the grinding container in a contactless manner via the closed container bottom.

[0055] According to a further embodiment, the laboratory mill comprises the ceramic material zirconium dioxide. According to a further embodiment, the laboratory mill comprises the closed container base made of the ceramic material, in particular zirconium dioxide. According to a further embodiment, the laboratory mill comprises the closed container base having a flat base surface, in particular a flat base surface formed on a base plate made of zirconium dioxide, on which the grinding tool is arranged. According to a further embodiment, the laboratory mill comprises the base plate having a thickness of 2 mm to 4 mm, in particular a thickness of 3 mm.

[0056] According to a further embodiment, the laboratory mill, wherein the grinding container has a stationary position on the mill body during grinding operation of the laboratory mill. According to a further embodiment, the laboratory mill, wherein the grinding tool is mounted on an axle which has a stationary position in the grinding container during grinding operation of the laboratory mill. According to a further embodiment, the laboratory mill, wherein the stationary position of the axle in the grinding container is established by a magnetic force which is provided by the contactless magnetic coupling during grinding operation. According to a further embodiment, the laboratory mill, wherein the grinding container has a container lid on which the axle is mounted. According to a further embodiment, the laboratory mill, wherein the grinding tool is arranged in the grinding container so that it can be exchanged without tools.

[0057] According to a further embodiment, the laboratory mill has an adjusting mechanism for engaging and disengaging the contactless magnetic coupling. According to a further embodiment, the laboratory mill has the adjusting mechanism being a manually operable adjusting mechanism. According to a further embodiment, the laboratory mill has the adjusting mechanism being able to actuate the engaging of the contactless magnetic coupling by manually attaching the grinding container to the mill body, and the adjusting mechanism being able to actuate the disengaging of the contactless magnetic coupling by manually removing the grinding container from the mill body. According to a further embodiment, the laboratory mill has the grinding container being pivotably mounted on the mill body. According to a further embodiment, the laboratory mill has the grinding container being arranged on the mill body so that it can be exchanged without tools.

[0058] A further aspect relates to comminuted ground material produced with a laboratory mill according to the preceding aspect. The comminuted ground material can be removed from the grinding container after the grinding operation. Alternatively or additionally, the comminuted ground material can be discharged from the grinding container during the grinding operation.

[0059] Short description of the characters

[0060] Figure 1 shows a laboratory mill in perspective view according to one embodiment.

[0061] Figure 2 shows the laboratory mill in a sectional view through a mill body and a grinding container of the laboratory mill according to respective embodiments. Figure 3 shows a contactless magnetic coupling of the laboratory mill between an electric drive and a grinding tool of the laboratory mill in a sectional view according to respective embodiments.

[0062] Figure 4 shows the contactless magnetic coupling of the laboratory mill according to an embodiment in an isolated and perspective view.

[0063] Figure 5 shows an adjusting mechanism for engaging and disengaging the contactless magnetic coupling of the laboratory mill according to one embodiment.

[0064] Figure 6 shows the grinding container of the laboratory mill in a perspective view of a container bottom of the grinding container.

[0065] Figure 7 shows a grinding container carrier of the laboratory mill according to an embodiment.

[0066] Figure 8a shows the grinding container of the laboratory mill with a safety locking device according to one embodiment.

[0067] Figure 8b shows the grinding container of the laboratory mill with a safety interlock and a locking device according to respective further embodiments.

[0068] Figure 9 shows the laboratory mill with an operating group in a sectional view according to the respective embodiments.

[0069] Figure 10 shows a laboratory mill system with modularly interchangeable grinding tools according to one embodiment.

[0070] Figure 11 shows the laboratory mill in a schematic representation according to an embodiment.

[0071] Figure 12 shows a flow chart with method steps for operating the laboratory mill according to an embodiment.

[0072] Figure 13 shows a further flow chart with method steps for operating the laboratory mill according to a further embodiment.

[0073] Detailed description of embodiments Figure 1 shows a laboratory mill 100. The laboratory mill 100 can be designed as a table-top device, wherein the laboratory mill 100 can be placed on a laboratory table (not shown in the figures). The laboratory mill 100 has a mill body 2, which can have a housing 3. The housing 3 can consist of at least one housing component 4. A control device 110, shown in Figure 2, for controlling the laboratory mill 100 is arranged in the mill body 2. A power supply 1, shown in Figure 9, for supplying energy to an electric drive 40, shown in Figure 3, for driving a grinding tool 20, shown in Figure 3, can also be arranged in the mill body 2.

[0074] The laboratory mill 100 can have an operating group 210 arranged on the mill body 2. The operating group 210 can have two user interfaces 211, 221, which can be operated by a user of the laboratory mill 100 to control a grinding operation of the laboratory mill 100 in which the grinding tool 20 is operated. The user interfaces 211, 221 can be connected to the control device 110 to communicate a grinding parameter, which can be set by the user via at least one of the user interfaces 211, 221, to the control device 110. The control device 110 can be configured to control the grinding operation based on the adjustable grinding parameter.

[0075] The laboratory mill 100 may include a touchscreen 212 arranged on the mill body 2, wherein the touchscreen 212 may include the first user interface 211. The first user interface 211 may be formed on a touch-sensitive area 214 of the touchscreen 212. The touch-sensitive area 214 may be configured to recognize a grinding parameter selected by the user by touching the touch-sensitive area 214, wherein the first user interface 211 is configured to communicate the grinding parameter to the control device 110.

[0076] The laboratory mill 100 can have a second user interface 221, which can have a rotary knob 222. The rotary knob 222 can be configured to recognize a grinding parameter selected by the user by rotating the rotary knob 222. The rotary knob 222 can be designed as a rotary knob 222 that can be removed from the mill body 2. A positioning aid 216 can be arranged on the mill body 2 or on the housing 3, which predetermines a desired position of the removable rotary knob 222 on the mill body 2. The rotary knob 222 can thus be manually attached to the desired position by the user using the positioning aid 216.

[0077] The laboratory mill 100 has a grinding container 10, which can be manually attached to the mill body 2 and manually removed therefrom. The grinding container 10 can be arranged on the mill body 2 with another grinding container (not shown) in a manually interchangeable manner. The grinding container 10 has a grinding bowl 18 and a container lid 16 for closing the grinding bowl 18. The container lid 16 can have an addition opening 5 for adding grinding material to the grinding container 10. The grinding container 10 can therefore be configured for continuous grinding operation with continuous addition of grinding material into the grinding container 10 during grinding operation. The grinding container 10 can have an outlet opening 6, from which ground material comminuted in the grinding container 10 can be dispensed. The comminuted ground material can be dispensed during continuous grinding operation.

[0078] According to one embodiment of the laboratory mill 100, the grinding container 10 can have a safety interlock 70. The safety interlock 70 is configured to prevent the user from opening the container lid 16 during grinding operation. The safety interlock 70 is also configured to prevent the container lid 16 from opening in the operating state of the grinding container 10 shown in Figure 1, in which it is attached to the mill body 2.

[0079] According to one embodiment of the laboratory mill 100, the laboratory mill 100 can have a pivot joint 7 for pivoting the grinding container 10 relative to the mill body 2. The grinding container 10 can be pivoted about a pivot axis 8 relative to the mill body 2, wherein the pivot axis 8 can be designed as a horizontal pivot axis 8 when the laboratory mill 100 is standing on the laboratory bench. The grinding container 10 can thus be pivoted on the mill body 2 for continuous grinding operation. The laboratory mill 100 can be operated in discontinuous operation with the grinding container 10 in the non-pivoted state shown in Figure 1. In continuous operation, the grinding container can be pivoted approximately 90 degrees about the pivot axis 8 from the state shown in Figure 1.

[0080] Figure 2 shows the laboratory mill 100 in a section through the mill body 2 and the grinding container 10. The mill body 2 can have a grinding container support 9, on which the grinding container 10 is arranged. The grinding container support 9 can be arranged on the pivot joint 7 and can be pivoted about the pivot axis 8 relative to the mill body 2. The grinding container support 9 can thus be pivotally connected to the mill body 2 via the pivot joint 7.

[0081] The laboratory mill 100 has an electric drive 40, which can be arranged on the grinding container support 9. The electric drive 40 can be connected to a drive control device 41, which is configured to control the electric drive 40. The drive control device 41, which can be arranged in the grinding container support 9, is electrically connected to the control device 110, which is arranged in the mill body 2. The electric drive 40 can be arranged in the grinding container support 9 or on it. According to one embodiment, the electric drive 40 and the grinding container 10, which can both be arranged on the grinding container support 9, can be pivotable relative to the mill body 2. The electric drive 40 and the grinding container 10 can thus be pivoted together by means of the rotary joint 7 about the pivot axis 8 relative to the mill body 2.The laboratory mill 100 can also have an orientation sensor 34, which is configured to detect a pivot angle of the grinding container support 9 relative to the mill body 2. The orientation sensor 34 can be configured as a rotary encoder and arranged on the rotary joint 7. The orientation sensor 34 can also be configured as an inclination sensor and arranged on the grinding container support 9.

[0082] The laboratory mill 100 has a grinding tool 20 arranged in the grinding container 10. The grinding tool 20 can be manually arranged in the grinding container 10 and manually removed therefrom. The grinding tool 20 can be arranged in the grinding container 10 so that it can be manually exchanged with another grinding tool (not shown). The grinding tool 20 can be designed as a rotor tool, as in the embodiment of the laboratory mill 100 shown in the figures. The grinding tool 20 can be rotatably mounted on an axis 22 arranged in the grinding container 10. During grinding operation, in which the tool 20 is operated in rotation about the axis 22, the axis 22 can have a stationary position in the grinding container 10. The electric drive 40 can be coupled to the grinding tool 20 for driving the grinding tool 20 in rotation via a contactless magnetic coupling 42.The grinding tool 20 can have a grinding screen 19 through which the ground material is discharged. The grinding screen 19 can be cylindrical and arranged coaxially with the axis 22 so that the ground material can pass through it in a radial direction.

[0083] The laboratory mill 100 may include a vibration sensor 90, which may be arranged on the mill body 2. The vibration sensor 90 may be configured to detect vibrations of the laboratory mill 100 during grinding operation, which vibrations are generated by the rotational operation of the grinding tool 20. The vibration sensor 90 may be connected to the control device 110, wherein the control device 110 may be configured to control the grinding operation of the laboratory mill 100 based on the vibrations detected by the vibration sensor 90.

[0084] Figure 3 shows the grinding tool 20, the electric drive 40, and the magnetic coupling 42 in detail. Also shown is an adjusting mechanism 50, which is configured to engage and disengage a magnetic coupling of the contactless magnetic coupling 42.

[0085] The grinding container 10 has a container bottom 15 on which the grinding tool 20 can be arranged. The container bottom 15 can have a base plate 13, which according to one embodiment is made of zirconium dioxide. The base plate 13 can have a flat bottom surface 14 on which the grinding tool 20 can be arranged without mechanical guidance. The container bottom 15 can form a closed container bottom 15 through which no drive component for driving the grinding tool 20 is guided.

[0086] The grinding tool 20 may have the axis 22, on which

[0087] Comminution tools 25, which according to the embodiment of the grinding tool 20 shown in the figures are designed as rotors, which can be radially mounted on the axis 22 via at least one ball bearing 26. The comminution tools 25 can be arranged for rotational movement on the axis 22. The grinding screen 19, which surrounds the comminution tools 25, can be fixedly arranged on the axis 22. The contactless magnetic coupling 42 has an output side 43, which can be connected in a rotationally fixed manner to the comminution tools 25 and, together with them, can be rotatably mounted on the axis 22 via the ball bearings 26.

[0088] The axle 22 can be held on the bottom surface 14 and the container lid 16. The axle 22 can be held radially and / or axially on the bottom surface 14 and the container lid 16. The axle 22 can be held non-rotatably on the bottom surface 14 and / or the container lid 16, wherein the axle 22, the container bottom 15, and / or the container lid 16 can have an anti-rotation device (not shown in the figures), which can be configured to establish the stationary position of the axle 22. The anti-rotation device can have a rotation lock, which can be configured to absorb a residual torque that can be transmitted via the ball bearing 26 through the magnetic coupling to the axle 22 during grinding operation with the grinding tool 20 rotating. The anti-rotation device or the rotation lock can thus block a relative rotation of the axle 22 to the grinding container 10. A movement of the axle 22 in the circumferential direction of the axle 22 can thus be prevented.As shown in Figure 2, the container lid 16 can have an axle mount 27 for axially holding the axle 22 in the grinding container 10 and / or the anti-rotation device. The axle 22 can be axially and / or radially fixed between the bottom surface 14 of the axle mount 27. The position of the axle 22 in the grinding container 10 can thus be fixed in a stationary manner in the grinding container 10 by the contactless magnetic coupling 42, the axle mount 27, and / or the anti-rotation device.

[0089] The contactless magnetic coupling 42 has a drive side 45, which can be connected in a rotationally fixed manner to a rotor 46 of an electric motor 47. The electric drive 40 has the electric motor 47, which, according to the embodiment shown in the figures, can be designed as an internal rotor motor. The electric motor 47 has a stator 48, which can surround the rotor 46 and can have windings of the electric motor 47. The drive side 45 of the contactless magnetic coupling 42, which can be driven in rotation by the electric motor 47, can be magnetically coupled to the output side 43 of the contactless magnetic coupling 42 in the delivered state of the contactless magnetic coupling 42 shown in Figure 3. In the magnetic coupling of the contactless magnetic coupling 42 in the delivered state, magnetic forces act between permanent magnet pairs 44, which can have the output side 43 and the drive side 45.The comminution tools 25 can thus be driven in a contactless rotational manner in the grinding container 10 by the magnetic force. The stationary position of the axis 22 can be fixed to the flat bottom surface 14 of the container bottom 15 by the contactless magnetic coupling 42 in the grinding container 10.

[0090] The grinding tool 20 can have a tool identifier carrier 21, which can have a tool identifier for identifying the grinding tool 20. The tool identifier carrier 21 can be designed as an RFID transponder 23, which can be arranged on a bottom region of the grinding tool 20, which can be arranged on the container bottom 15. The RFID transponder 23 can be read by an RFID reader 17 shown in Figures 5 and 7, which can be arranged on the mill body 2. The RFID reader 17 can be connected to the control device 110 in order to read the tool identifier and communicate it to the control device 110.

[0091] Figure 4 shows the output side 43 and the drive side 45 of the contactless magnetic coupling 42 in an isolated view. The drive side 45 and the output side 43 can each have a plurality of permanent magnets 44', which can form magnetically coupled permanent magnet pairs 44 when the contactless magnetic coupling 42 is in the engaged state. The magnetic force between the output side 43 and the drive side 45 can thus be formed from cumulative individual magnetic forces between the permanent magnet pairs 44. The output side 43 can be rotatably mounted on the axle 22 via the ball bearings 26 shown in Figure 3, which can thus have a stationary position in the grinding container 10. The comminution tools 25 shown in Figure 3 can be non-rotatably mounted on the output side 43. The drive side 45 can be rotationally connected or mechanically operatively connected to the rotor 46 of the electric motor 47 shown schematically in Figure 4.A rotational movement of the rotor 46 can thus be transmitted to the comminution tools 25 via the magnetic force of the supplied contactless magnetic coupling 42, wherein the rotational movement is not transmitted to the axis 22 on which the comminution tools 25 are rotatably mounted.

[0092] Figures 3 and 5 show the adjusting mechanism 50 for engaging and disengaging the contactless magnetic coupling 42 shown in Figure 4. The adjusting mechanism 50 is configured to move the drive side 45 of the contactless magnetic coupling 42 relative to the output side 43 of the contactless magnetic coupling 42. The adjusting mechanism 50 can have a translational adjusting mechanism configured to move the drive side 45 translationally relative to the output side 43. The adjusting mechanism 50 can be configured to move the drive side 45 translationally parallel or coaxially to the axis 22.

[0093] The adjusting mechanism 50 can have a cylindrical adjusting body 52, on which the drive side 45 can be movably guided via the electric drive 40. The adjusting body 52 can be connected in a rotationally fixed manner to an actuating member 56. The actuating member 56 can have at least one actuating receptacle 57, into which the grinding container 10 can engage when the grinding container 10 is arranged on the actuating member 56. The grinding container 10 can have at least one engagement element 12, shown in Figure 6, which can engage in the actuating receptacle 57. Rotating the grinding container 10, which engages in the actuating receptacle 57 via the engagement element 12, can cause the adjusting body 52 to rotate. The rotation of the grinding container 10 can occur when the grinding container 10 is arranged and locked on the mill body 2.

[0094] The adjusting mechanism 50 can have actuators 53, which can connect the electric drive 40 to the mill body 2. The actuators 53 can be arranged for translational movement in guide rails 54, which can be arranged on the mill body 2. The guide rails 54 can be fastened to the mill body 2 and can thus form stationary guide rails 54 in the mill body 2 for translational guidance of the actuators 53. The actuators 53 can also be guided in guide grooves 55, which can be formed in the adjusting body 52. ​​The guide grooves 55 can extend helically in sections in the cylindrical adjusting body 52. ​​The partially helical guide grooves 55 can have a constant and / or variable pitch.The translational guidance of the actuators 53 in the guide rails 54 and the helical guidance of the actuators 53 in the cylindrical actuator body 52 can cause an axial movement of the drive side 45 of the contactless magnetic coupling 42 relative to a cylinder axis of the cylindrical actuator body 52 upon rotation of the actuator body 52. ​​The resulting axial movement of the drive side 45 can be the translational movement of the drive side 45, which can occur parallel or coaxially to the axis 22.

[0095] Starting from the grinding container 10, the guide grooves 55 can have a clockwise thread. A clockwise rotation of the grinding container 10 after engagement of the grinding container 10 in the actuating receptacles 57 can cause the drive side 45, which is arranged in the adjusting body 52, to approach the output side 43. The clockwise rotation of the grinding container 10 can occur when the grinding container 10 is arranged and locked on a locking device 65, which is arranged on the mill body 2. The locking device 65 is configured to lock the grinding container 10 to the mill body 2. The grinding container 10 can thus be secured stationary on the mill body 2. The locking device 65 can have a bayonet lock 66.The clockwise rotation of the grinding container 10 can thus cause the contactless magnetic coupling 42 to be moved, whereby the electric drive 40 with the drive side 45 can be brought closer to the output side 43 and thus can be moved with it.

[0096] A counterclockwise rotation of the grinding container 10 when engaging the actuating receptacles 57 can cause the drive side 45 to be removed from the output side 43. The counterclockwise rotation of the grinding container 10 can occur when the grinding container 10 is released from the locking device 65. The counterclockwise rotation of the grinding container 10 can thus cause the contactless magnetic coupling 42 to be separated, whereby the electric drive 40 with the drive side 45 can be removed from the output side 43 and thus separated from it. Figure 6 shows the grinding container 10 in a perspective view of the container base 15. The grinding container 10 can have a container identifier carrier 11, which can have a container identifier for identifying the grinding container 10. The container identifier carrier 11 can be connected to a spring contact 60, which can be arranged on the container bottom 15.

[0097] Figure 7 shows the grinding container support 9 of the mill body 2 in a perspective view of the locking device 65 for locking the grinding container 10 to the grinding container support 9. Figures 6 and 7 show the spring contact 60, which can have spring contact pins 62 arranged on the grinding container side as shown in Figure 6 and circular contact rails 64 arranged on the mill body side. With the spring contact 60, a wireless

[0098] A data communication section 32 may be formed, which can be established by contacting the spring contact pins 62 with the contact rails 64. The contacting can be established automatically by manually arranging the grinding container 10 on the mill body 2 while locking the grinding container 10 on the locking device 65.

[0099] Via the wireless data communication section 32, operating data of the grinding container 10 and / or the grinding tool 20, which can be detected by the sensor 30 shown in Figure 3, can be communicated from the sensor 30 to the control device 110. The sensor 30 can be configured to detect operating data of the grinding container 10 and / or the grinding tool 20. The operating data can include an operating temperature of the grinding container 10 and / or the grinding tool 20. Alternatively or additionally, the operating data can include a

[0100] Detect the closed state of the grinding container 10 and / or a locked state of the grinding container 10. To detect the locked state, a contact can be set up on the grinding container support 9 in a locked position of the grinding container 10. The contact can have a spring contact pin 62' arranged on the grinding container side, which can be designed as an end contact 68 on the grinding container side, and a contact rail 64' arranged on the mill body side, which can be designed as an end contact 68 on the mill body side. The end contacts 68 can establish a contact in the locked position, which can communicate the locked state to the control device 110. The control device 110 can control and enable the grinding operation if the contact is present in the locked state.

[0101] Figure 8a shows the grinding container 10 with the safety locking device 70 according to one embodiment. The safety locking device 70 can be arranged on the grinding container 10. The grinding container 10 is shown in an operating state B of the grinding container 10, which is configured for grinding operation and in which the grinding container 10 is arranged on the mill body 2. In the operating state B configured for grinding operation, the safety locking device 70 is configured to prevent manual movement of the container lid 16 relative to the grinding pot 18. The safety locking device 70 is configured to prevent the container lid 16 from opening.

[0102] The safety locking device 70 can have a locking device 72, which can be arranged on the grinding bowl 18. The locking device 72 can have a movable locking element 74, which can be mounted on the grinding bowl 18. The movable locking element 74 can engage with an active element 78, which can be arranged on the container lid 16 and connected thereto in a rotationally fixed manner. The movable locking element 74 can be designed as a locking pin 75, which can engage with the active element 78. The locking device 72 can have an actuating element 76, which can cause the movable locking element 74 to engage with the active element 78 and thus secure the container lid 16 against rotation.The actuating element 76 can be designed as a spring 77, which can be configured and arranged on the grinding bowl 18 in such a way that it exerts an actuating force on the movable locking element 74, which can cause engagement with the active element 78. The spring 77 can preload the movable locking element 74 toward the container lid 16.

[0103] The active element 78 can have a conical region 79, which can bear against the movable locking element 74 when the container lid 16 is rotated relative to the grinding bowl 18. The conical region 79 can cause the movable locking element 74 to initially be moved counter to the actuating force of the actuating element 76 when the container lid 16 is rotated relative to the grinding bowl 18, until the movable locking element 74 engages in a receptacle 80 of the active element 78 for receiving the movable locking element 74. The locking device 72 can have an actuating element 82, which can be arranged on the container lid 16. The actuating element 82 can be designed as an actuating pin 83, which can be arranged coaxially to the locking pin 75. The locking device 72 can also have a return element 84, which can be designed as a return spring 85.The return element 84 can be configured and arranged on the container lid 16 to move the actuating element 82 in the direction of the actuating force of the actuating element 76. When the actuating element 82 is actuated in operating state B, it can abut the movable locking element 74, which in turn can abut the mill body 2 shown schematically in Figure 8a. Actuation can occur by manually pressing the section of the actuating element 82 protruding from the container lid 16. Release of the safety locking device 70 is thus mechanically blocked in operating state B. If the grinding container 10 is removed from the mill body 2, actuation of the actuating element 82 can cause it to press the movable locking element 74 out of engagement with the receptacle 80, whereby the safety locking device 70 can be released because the movable locking element 74 no longer engages with the active element 78.The safety lock 70 can therefore only be released after the grinding container 10 has been removed from the mill body 2.

[0104] Figure 8b shows the grinding container 10 with a safety locking device 70 according to a further embodiment. The grinding container 10 is shown in operating state B of the grinding container 10, which is set up for grinding operation. The safety locking device 70 has a locking device 72, which can be arranged on the grinding bowl 18. The locking device 72 can have a movable locking element 74, which can be mounted on the grinding bowl 18. The movable locking element 74 can engage in an active element 78, which can be arranged on the container lid 16 and connected thereto in a rotationally fixed manner. The movable locking element 74 can have a locking pin 75, which can engage in a recess 73 of the active element 78.The locking device 72 can have an adjusting element 76, which can cause the movable locking element 74 to engage with the active element 78 and thus secure the container lid 16 against rotation of the container lid 16 toward the grinding bowl 18. The adjusting element 76 can be designed as a spring 77, which can be configured and arranged on the grinding bowl 18 such that it exerts an adjusting force on the movable locking element 74, which can bring about engagement with the active element 78. The spring 77 can preload the movable locking element 74 in the direction of the container lid 16.

[0105] The grinding container 10 has a locking device 71, which blocks locking of the grinding container 10 to the locking device 65 when the container lid 16 is not arranged on the grinding pot 18 in the arrangement state A of the container lid 16 on the grinding pot 18 shown in Figure 8b, and closes the latter in this state. In the operating state B of the grinding container 10, which is set up for grinding operation, the locking device 71 engages in the locking device 65 and thus blocks movement of the locking element 74, which could release the engagement of the locking pin 75 in the recess 73. The locking device 71 has a locking element 86, which is rotatably mounted on the grinding pot 18. The locking element 86 is movably connected to the locking pin 75 via an eccentric 87, to which the movable locking element 74 is hinged.If the locking pin 75 engages in the recess 73 when the container lid 16 is locked to the grinding bowl 18 in the arrangement state A, the engagement of the locking pin 75 causes the locking element 86 to rotate into a release position F, in which the locking element 86 is arranged such that it can engage the locking device 65. The rotation is effected via the eccentric 87, which is connected to the locking element 86 in a rotationally fixed manner and centrally to a rotation axis of the locking element 86 and eccentrically connected to the locking pin 75. The locking element 86 can be arranged in the engagement element 12, wherein the locking element 86 can have an element structure which, in the release position F, can be arranged in the contour of the engagement element 12 such that the bayonet lock 66 can be engaged.If the locking pin 75 does not engage the recess 73 when the container lid 16 is not locked to the grinding bowl 18 in the arrangement state A, the active element 78 or the actuating force of the actuating element 76 causes the rotation of the locking element 86 into a locked position, in which the locking element 86 is arranged such that it cannot engage the locking device 65. In the locked position, the element structure can be arranged in the contour of the engagement element 12 such that the bayonet lock 66 cannot engage. Figure 9 shows the laboratory mill 100 in a sectional view through the operating group 210, which is arranged on the mill body 2. The operating group 210 is configured to set a grinding parameter for a grinding operation of the laboratory mill 100. The grinding parameter can be set manually by a user via the operating group 210.The control group 210 may include a first user interface 211 and a second user interface 221. The grinding parameter can be set by the user either by operating the first user interface 211 or the second user interface 221.

[0106] The control panel 210 can include the touchscreen 212, which can be configured as the first user interface 211. The control panel 210 can also include a rotary control 222, which can be configured as the second user interface 221. The grinding parameter can be set by the user by selectively operating the touchscreen 212 or the rotary control 222.

[0107] The rotary actuator 222 can be arranged on the touchscreen 212, wherein the rotary actuator 222 can be arranged on an outer display layer 213 of the touchscreen 212. The rotary actuator 222 can be arranged outside the touch-sensitive area 214 of the touchscreen 212. The rotary actuator 222 can be arranged on a rotary encoder 224 and magnetically coupled thereto. The rotary encoder 224 can be arranged below the outer display layer 213, wherein the rotary actuator 222 can be held on the outer display layer 213 via a contactless magnetic coupling with the rotary encoder 224, which can be designed without a mechanical holder for holding the rotary actuator 222 to the outer display layer 213. The rotary actuator 222 can thus be magnetically held to the outer display layer 213 and can be manually removed from it by the user without leaving any residue.

[0108] The rotary actuator 222 can be rotated manually to set the grinding parameter. The rotary encoder 224 can be configured to detect the set grinding parameter based on a rotation angle of the rotary actuator 222. The rotary actuator 222 can have permanent magnets 223 on the actuator side, which can be magnetically coupled to permanent magnets 225 on the encoder side. The rotary encoder 224 can be configured to detect rotation of the magnetically coupled permanent magnets 223, 225 due to manual rotation of the rotary actuator 222 by the user. The rotary encoder 224 can be connected to the control device 110 in order to communicate the set grinding parameter to the control device 110 based on a rotation angle of the rotary actuator 222.

[0109] The rotary knob 222 can also be pressed manually to adjust and / or set the set grinding parameter. The rotary knob 222 can have a further permanent magnet 226, which can be magnetically coupled to a Hall sensor 226 by pressing the rotary knob 222. The rotary encoder 224 can have the Hall sensor 226, which can be arranged under the display outer layer 213. The rotary knob 222 can be pressed against the spring force of a setting spring 221, which resets the rotary knob 222 after being pressed. The rotary encoder 224 can be configured to detect the set grinding parameter based on a magnetic coupling of the permanent magnet 227 with the Hall sensor 226. The rotary encoder 224 can be connected to the control device 110 in order to communicate the set grinding parameter to the control device 110 based on the magnetic coupling.

[0110] The operating group 210 can include the visual positioning aid 216, which can be formed on the display outer layer 213 by a light source 217 arranged beneath the display outer layer 213. Using the visual positioning aid 216, the rotary actuator 222 can be manually positioned on the display outer layer 213 such that the contactless magnetic coupling of the rotary function of the rotary actuator 222 and the magnetic coupling for the push function of the rotary actuator 222 can be configured. The LED light source 217 can be configured as an LED ring, which visualizes a target position for the contactless magnetic coupling and the magnetic coupling through the translucent display outer layer 213.The visual positioning aid 216 can thus be configured to visualize whether an actual position of the rotary actuator 222 and the target position of the rotary actuator 222 on the display outer layer 213, on which the rotary actuator 222 is positioned and configured for setting the grinding parameter, match or differ from one another. Figure 10 shows a laboratory mill system 300 having two grinding tools 20, 20'. The grinding tools 20, 20' can be arranged in a modular, interchangeable manner on the mill body 2. Figure 10 shows an operating state of the modular laboratory mill system 300, in which one grinding tool 20 of the grinding tools 20', 20' is arranged on the mill body 2. The grinding tool 20 arranged on the mill body 2 can be replaced by the additional grinding tool 20'. The grinding tool 20 arranged on the mill body 2 has the comminution tools 25. The further grinding tool 20' has a grinding chamber 27 which can be driven in rotation.

[0111] The grinding tool 20 arranged on the mill body 2 can be arranged in the grinding container 10. The additional grinding tool 20' can also be arranged in the grinding container 10 in the operating state not shown in Figure 10, in which the additional grinding tool 20' is arranged on the mill body 2. The grinding tool 20 arranged on the mill body 2 can have the tool identifier 21, and the additional grinding tool 20' can have a further tool identifier 21'. In the respective operating state in which the respective grinding tool 20, 20' is arranged on the mill body 2, the grinding tool 20 and the additional grinding tool 21 can be connected via the contactless magnetic coupling 42 to the drive 40 for driving the respective grinding tool 20, 20'. For this purpose, the respective grinding tool 20, 20' can have the output side 43 of the contactless magnetic coupling 42. The drive 40 is connected to the control device 110 via the drive control 41.The modular laboratory mill system 300 may also include the orientation sensor 34, which can detect the operating orientation of the respective grinding tool 20, 20'.

[0112] Figure 11 shows the laboratory mill 100 in a schematic representation with the control device 110, the grinding container 10, the grinding tool 20, the sensor 30, the electric drive 40, the drive control device 41, the contactless magnetic coupling 42, the spring contact 60, the vibration sensor 90, the operating group 210 and the user interfaces 211, 221.

[0113] The control device 110 can be connected to the drive control device 41 for controlling the electric drive 40 and can be configured to control the drive control device 41 for controlling the electric drive 40 and for driving the grinding tool 20. The electric drive 40 can have the drive side 45 and the output side 43 of the contactless magnetic coupling 42. The electric drive 40 can be configured to drive the grinding tool 20.

[0114] The control device 110 can be connected to the container identifier carrier 11 of the grinding container 10 via the spring contact 60 and can be configured to read the container identifier stored on the container identifier carrier 11 in order to control the electric drive 40 for driving the grinding tool 20 based on the container identifier. The control device 110 can be contactlessly connected to the tool identifier carrier 21 of the grinding tool 20 and can be configured to read the tool identifier stored on the tool identifier carrier 21 in order to control the electric drive 40 for driving the grinding tool 20 based on the tool identifier.

[0115] The control device 110 can be connected to the user group 210 and the user interfaces 211, 221 and configured to control at least one of the user interfaces 211, 221 to output a signal to a user of the laboratory mill 100. The control device 110 can also be connected to the vibration sensor 90 to read in a vibration of the laboratory mill 100 detected by the vibration sensor 90.

[0116] Figure 12 shows a flowchart with method steps for operating the laboratory mill 100 shown in Figure 11 or the laboratory mill system 300 shown in Figure 10. The method steps are shown in a chronological sequence according to one embodiment. The method steps can be performed by the control device 110.

[0117] In a step 50a, a grinding container (not shown in the figures) with which the laboratory mill 100 was equipped for holding a grinding material can be manually replaced by the grinding container 10 with which the laboratory mill 100 is equipped for holding the grinding material by a user of the laboratory mill 100. The grinding containers can be located in at least one container-specific

[0118] Property. In a further step S1a, the container identifier of the grinding container 10, with which the laboratory mill 100 is equipped for holding the material to be ground, can be read from the container identifier carrier 11 via the spring contact 60. The spring contact 60 can be set up automatically by the user manually arranging the grinding container 10 on the mill body 2.

[0119] In a further step S2a, the container identifier of the grinding container 10, with which the laboratory mill 100 is equipped for holding a material to be ground, can be read by the control device 110. The container identifier can have identification data that can identify a container type of the grinding container 10, which can indicate a grinding container configured for continuous grinding operation or a grinding container configured for discontinuous grinding operation.

[0120] In a step S1b, a grinding tool (not shown in the figures) with which the laboratory mill 100 was equipped for comminuting the material to be ground can be manually replaced by a user of the laboratory mill 100 with the grinding tool 20 with which the laboratory mill 100 is equipped for comminuting the material to be ground. The grinding tools can differ in at least one tool-specific property. In a further step S1b, the tool identifier of the grinding tool 20 with which the laboratory mill 100 is equipped for comminuting the material to be ground can be read contactlessly from the tool identifier carrier 21 by the RFID reader 17 shown in Figure 5, which can be embodied as the RFID transponder 23 shown in Figure 3.

[0121] In a further step S2b, the tool identifier of the grinding tool 20 with which the laboratory mill 100 is equipped for comminuting the material to be ground can be read by the control device 110. The tool identifier can include identification data that identify a tool type of the grinding tool 20, which can be one of a rotor tool, a cutting tool, a knife tool, a disc tool, and a ball tool.

[0122] In an optional further step S2c, an operational orientation of the

[0123] Grinding container 10, in which the grinding container 10 is oriented relative to a mill body 2, can be read by the control device 110. The operating orientation can be detected with the orientation sensor 34 shown in Figure 2, wherein the operating orientation can include the pivot angle of the grinding container carrier 9 relative to the mill body 2.

[0124] In a further step S3, at least one control parameter for controlling the electric drive 40 can be selected by the control device 110 depending on the read-in container identifier and the read-in tool identifier. The control parameter can additionally be selected depending on the operating orientation. The control parameter can be selected for controlling an output speed of the electric drive 40 depending on the read-in container identifier and / or the read-in tool identifier. Alternatively or additionally, the control parameter for controlling an output rotational direction of the electric drive 40 can be selected depending on the read-in container identifier and / or the read-in tool identifier.

[0125] In a further step S4, the selected control parameter can be output to the drive control device 41 for controlling the electric drive 40. The control parameter can be output to control an operating speed of the grinding tool 20. Alternatively or additionally, the control parameter can be output to the drive control device 41 to control an operating direction of the grinding tool 20. In yet a further step S5, the electric drive 40 can be controlled by the control device 110 based on the control parameter in order to control the grinding operation of the laboratory mill 100 based on the control parameter.

[0126] Figure 13 shows a flowchart with method steps for operating the laboratory mill 100 shown in Figure 11 or the laboratory mill system 300 shown in Figure 10. The method steps are shown in a chronological sequence according to one embodiment. The method steps can be performed by the control device 110.

[0127] In a step V0, an oscillation amplitude and / or a

[0128] The oscillation period of a vibration of the laboratory mill 100 is detected by the vibration sensor 90 arranged on the mill body 2. In a further step, the vibration amplitude and / or vibration period detected by the vibration sensor 90 can be read by the control device 110.

[0129] In a step V1, a vibration behavior of the laboratory mill 100 during a grinding operation can be determined. The step of determining V1 of the vibration behavior can be performed when the grinding tool 20 in the grinding container 10 is rotationally driven by the electric drive 40 during the grinding operation. The vibration behavior can be determined based on the detected vibration amplitude and / or vibration period duration.

[0130] In a further step V2, a limit value for the vibration behavior of the laboratory mill 100 during grinding operation can be read in by the control device 110. The limit value can be provided by an information carrier 24 shown in Figure 3, which can be arranged on the grinding tool 20. Alternatively, the information carrier 24 can be arranged on the grinding container 10. The limit value can be a limit value for the vibration amplitude and / or the vibration period duration.

[0131] In a further step V3, it can be checked whether the determined vibration behavior indicates a critical vibration state for the milling operation, whereby it can be checked whether the determined vibration behavior exceeds the read-in limit value. In step V3, it can be checked whether the detected vibration amplitude and / or vibration period exceeds a critical vibration amplitude and / or vibration period.

[0132] In step V3, the test result can be determined that the specific vibration behavior exhibits the critical vibration state for grinding operation if the detected vibration amplitude and / or vibration period exceeds the read-in limit value for the vibration amplitude and / or vibration period. Alternatively, the test result can be determined in step V3 that the specific vibration behavior does not exhibit the critical vibration state for grinding operation if the detected vibration amplitude and / or vibration period does not exceed the read-in limit value for the vibration amplitude and / or vibration period.

[0133] In a further step V4, a technical intervention in the operation of the laboratory mill 100 can be determined based on a test result resulting from the testing step. In step V4, the technical intervention can be determined if the test result in step V3 determined that the determined vibration behavior has the critical vibration state for the grinding operation. The specified technical intervention can be maintenance, repair, or replacement of the grinding tool 20 and / or the grinding container 10, which is necessary to continue the grinding operation. The maintenance can be maintenance of the ball bearing 26 shown in Figure 3. The repair can be balancing the grinding tool 20. The replacement can be replacement of the ball bearing 26 shown in Figure 3 and / or a comminution tool 25 shown in Figure 3.

[0134] In a further step V5, a signal can be output to a user of the laboratory mill 100 via the user interface 211 of the operating group 210, wherein the signal comprises visual technical information that visually communicates to the user that the specified technical intervention in the operation of the laboratory mill 100 is required. The signal can comprise visual information that visually communicates to the user that the maintenance, repair, or replacement of the grinding tool 20 and / or the grinding container 10 is required. Reference symbol

[0135] Power supply

[0136] Mill body

[0137] Housing

[0138] Housing component

[0139] Addition opening

[0140] Dispensing opening

[0141] swivel joint

[0142] Swivel axis

[0143] Grinding container carrier

[0144] Grinding container

[0145] Container identifier carrier

[0146] engagement element

[0147] base plate

[0148] Floor area

[0149] Container bottom

[0150] Container lid

[0151] RFID reader

[0152] grinding pot

[0153] Grinding sieve, 20' Grinding tool, 21 1 Tool identifier carrier

[0154] axis

[0155] RFID transponder

[0156] Information carrier

[0157] Shredding tool

[0158] ball bearings

[0159] Axle mount

[0160] Grinding room

[0161] Sensor wireless data communication section

[0162] Orientation sensor electric drive drive control device contactless magnetic coupling output side

[0163] Permanent magnet pair ' permanent magnet

[0164] Drive side

[0165] rotor

[0166] electric motor

[0167] stator

[0168] Adjusting mechanism

[0169] Actuator

[0170] actuator

[0171] guide rail

[0172] guide groove

[0173] Actuator

[0174] Actuation mount

[0175] Spring contact, 62' spring contact pin, 64' contact rail

[0176] locking device

[0177] bayonet lock

[0178] End contact

[0179] Safety interlock

[0180] locking device

[0181] Locking device

[0182] recess

[0183] Locking element

[0184] locking pin

[0185] Actuator

[0186] Feather

[0187] Active element conical area

[0188] Recording

[0189] Actuating element 83 Actuating pin

[0190] 84 Reset element

[0191] 85 Return spring

[0192] 86 locking element

[0193] 87 eccentric

[0194] 90 Vibration sensor

[0195] 100 laboratory mill

[0196] 110 Control device

[0197] 210 Operating group

[0198] 211 , 221 User interface

[0199] 212 touchscreen

[0200] 213 Display outer layer

[0201] 214 touch-sensitive area

[0202] 216 Positioning aid

[0203] 217 lamps

[0204] 221 Adjusting spring

[0205] 222 rotary actuators

[0206] 223 actuator-side permanent magnets

[0207] 224 encoders

[0208] 225 encoder-side permanent magnets

[0209] 226 Hall sensors

[0210] 227 Permanent magnet

[0211] 300 laboratory mill system

[0212] A arrangement state

[0213] B Operating state

[0214] F Release position

[0215] SOa Replace grinding container

[0216] SOb Replace grinding tool

[0217] S1a Read container identifier

[0218] S1b Read tool identifier

[0219] S2a Reading container identifier

[0220] S2b Reading tool identifier

[0221] S2c Reading Operational Orientation

[0222] S3 Select control parameters 54 Output control parameters

[0223] 55 Controlling electric drive

[0224] VO Detecting Vibration

[0225] V1 Determine vibration behavior

[0226] V2 Read limit value

[0227] V3 Check vibration behavior

[0228] V4 Determine technical intervention

[0229] V5 Output Signal

Claims

Patent claims 1. Laboratory mill (100) for comminuting a material to be ground, comprising a grinding container (10) which is arranged on a mill body (2), a grinding tool (20) which is arranged in the grinding container (10), and a drive (40) which has a contactless magnetic coupling (42) for transmitting a torque to the grinding tool (20), wherein the contactless magnetic coupling (42) couples the grinding tool (20) to drive components of the drive (40) arranged outside the grinding container (10) in a contactless manner.

2. Laboratory mill (100) according to claim 1, with the drive (40) which has the contactless magnetic coupling (42) for transmitting the torque in a grinding operation of the laboratory mill (100) to the grinding tool (20), wherein the grinding tool (20) is mounted on an axis (22) which has a stationary position in the grinding container (10) during the grinding operation.

3. Laboratory mill (100) according to claim 2, wherein the stationary position of the axis (22) in the grinding container (10) is established by a magnetic force which is provided by the contactless magnetic coupling (42) in the grinding operation.

4. Laboratory mill (100) according to one of the preceding claims, wherein the contactless magnetic coupling (42) has a drive side (45) and an output side (43) which have a plurality of magnetically coupleable permanent magnet pairs (44).

5. Laboratory mill (100) according to one of claims 2 to 4, wherein the grinding container (10) has a stationary position on the mill body (2) during the grinding operation of the laboratory mill (100).

6. Laboratory mill (100) according to one of the preceding claims, wherein the grinding container (10) has a flat bottom surface (14) on which the grinding tool (20) is arranged.

7. Laboratory mill (100) according to one of claims 2 to 6, wherein the grinding container (10) has a container lid (16) on which the axis (22) is mounted.

8. Laboratory mill (100) according to one of the preceding claims, wherein the grinding container (10) has a closed container bottom (15).

9. Laboratory mill (100) according to claim 8, wherein the contactless magnetic coupling (42) couples the grinding tool (20) to the drive components of the drive (40) arranged outside the grinding container (10) in a contactless manner via the closed container bottom (15).

10. Laboratory mill (100) according to claim 8 or 9, wherein the closed container bottom (15) comprises a non-magnetizable material.

11. Laboratory mill (100) according to one of claims 8 to 10, wherein the closed container bottom (15) comprises a ceramic material.

12. Laboratory mill (100) according to claim 11, wherein the ceramic material comprises zirconium dioxide.

13. Laboratory mill (100) according to claim 11 or 12, wherein the closed container bottom (15) consists of the ceramic material, in particular of zirconium dioxide.

14. Laboratory mill (100) according to one of claims 8 to 13, wherein the closed container bottom (15) has a flat bottom surface (14), in particular a flat bottom surface (14) formed on a bottom plate (13) made of zirconium dioxide, on which the grinding tool (20) is arranged.

15. Laboratory mill (100) according to claim 14, wherein the base plate (13) has a thickness of 2 mm to 4 mm, in particular a thickness of 3 mm.

16. Laboratory mill (100) according to one of the preceding claims, wherein the grinding tool (20) and / or the grinding container (10) is arranged in the grinding container (10) in a tool-free manner.

17. Laboratory mill (100) according to one of the preceding claims, with an adjusting mechanism (50) for advancing and separating the contactless magnetic coupling (42).

18. Laboratory mill (100) according to claim 17, wherein the adjusting mechanism (50) is a manually operable adjusting mechanism (50) for engaging and disengaging the contactless magnetic coupling (42).

19. Laboratory mill (100) according to claim 17 or 18, wherein the positioning mechanism (50) can be used to actuate the positioning of the contactless magnetic coupling (42) by manually attaching the grinding container (10) to the mill body (2).

20. Laboratory mill (100) according to one of claims 17 to 19, wherein the actuating mechanism (50) can be used to separate the contactless magnetic coupling (42) by manually removing the grinding container (10) from the mill body (2).

21. Laboratory mill (100) according to one of the preceding claims, wherein the contactless magnetic coupling (42) is pivotally arranged on the mill body (2).

22. Laboratory mill (100) according to one of the preceding claims, wherein the grinding container (10) is pivotally arranged on the mill body (2).

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