Disclosed in the present invention is a high-precision externally-adjustable coffee grinder, including a main housing, a lifting rod, a grinding assembly and a coarseness adjusting structure, where the coarseness adjusting structure includes an external adjusting ring, an internal driving ring, a transmission gear; the external adjusting ring is sleeved and rotates relative to the main housing; the external adjusting ring is engaged with the internal driving ring through the transmission gear; and the external adjusting ring drives the internal driving ring to rotate to drive the lifting rod to adjust a grinding disc gap. The adjusting precision of the adjusting structure is greatly improved, the advantages of convenient adjustment of the externally-adjustable coffee grinder and clear scale indication of a one-turn coffee grinder are retained, and the problem of low precision of the one-turn adjusting coffee grinder in the prior art is solved.

A grinder for grinding coffee beans has a first grinding disk carrier having a first grinding disk; a second grinding disk carrier having a second grinding disk; and a drive unit, by means of which at least one of the two grinding disks is rotatably operated. At least the grinding disk of the two grinding disks that is rotatably operated by means of the drive unit is directly or indirectly coupled to the drive unit by means of a central interlocking connection, the central interlocking connection being in the form of a continuous shaft-hub connection for direct torque transfer from the drive unit directly or indirectly to the grinding disk.

A grinder for grinding coffee beans has a first grinding disk carrier having a first grinding disk; a second grinding disk carrier having a second grinding disk; and a drive unit, by means of which at least one of the two grinding disks is rotatably operated. At least the grinding disk of the two grinding disks that is rotatably operated by means of the drive unit is directly or indirectly coupled to the drive unit by means of a central interlocking connection, the central interlocking connection being in the form of a continuous shaft-hub connection for direct torque transfer from the drive unit directly or indirectly to the grinding disk.

A method for use of an apparatus comprises: a grinding step, a cleaning step, and a de-ionizing step; the apparatus comprises a receptacle to contain the product to be ground and provided with an unloading aperture; a fixed grinder; a mobile grinder rotatable around a rotation axis connectable to a drive motor; a cleaning device connected to the mobile grinder; a grinding chamber in which the fixed grinder, the mobile grinder and the cleaning device are located and provided with a discharge aperture to discharge the ground product.

A method for use of an apparatus comprises: a grinding step, a cleaning step, and a de-ionizing step; the apparatus comprises a receptacle to contain the product to be ground and provided with an unloading aperture; a fixed grinder; a mobile grinder rotatable around a rotation axis connectable to a drive motor; a cleaning device connected to the mobile grinder; a grinding chamber in which the fixed grinder, the mobile grinder and the cleaning device are located and provided with a discharge aperture to discharge the ground product.

A coffee bean grinder comprising a housing and a cartridge. The housing may be configured to receive coffee beans. The cartridge may be removably couplable to the housing and include a cartridge base, a cartridge top, a grinding chamber, and a grinding device. The cartridge top may be removably coupled to the cartridge base. The grinding chamber may be defined between the cartridge base and the cartridge top. The grinding device may be positioned within the grinding chamber and configured to grind coffee beans received in the housing into coffee grounds.

A coffee bean grinder comprising a housing and a cartridge. The housing may be configured to receive coffee beans. The cartridge may be removably couplable to the housing and include a cartridge base, a cartridge top, a grinding chamber, and a grinding device. The cartridge top may be removably coupled to the cartridge base. The grinding chamber may be defined between the cartridge base and the cartridge top. The grinding device may be positioned within the grinding chamber and configured to grind coffee beans received in the housing into coffee grounds.

A coffee grinder with a grind size easy to adjust includes a cup lid, a coffee cup, a bean hopper and a lid body. The cup lid is arranged at the bottom of the coffee cup. The bean hopper is arranged at the top of the coffee cup. The lid body is arranged at the top of the bean hopper. A protruding tool-setting screw rod is arranged on a bottom surface of the lid body. The tool-setting screw rod extends into a driving disc base. A rotary rod is arranged in a tool-setting nut sleeve and has an end extending into a motor arranged in the tool-setting screw rod as well as an end extending into a bean hopper support. The coffee grinder is simple and reasonable in structural design and being provided with a structure for adjusting the size of ground coffee beans.

A coffee grinder with a grind size easy to adjust includes a cup lid, a coffee cup, a bean hopper and a lid body. The cup lid is arranged at the bottom of the coffee cup. The bean hopper is arranged at the top of the coffee cup. The lid body is arranged at the top of the bean hopper. A protruding tool-setting screw rod is arranged on a bottom surface of the lid body. The tool-setting screw rod extends into a driving disc base. A rotary rod is arranged in a tool-setting nut sleeve and has an end extending into a motor arranged in the tool-setting screw rod as well as an end extending into a bean hopper support. The coffee grinder is simple and reasonable in structural design and being provided with a structure for adjusting the size of ground coffee beans.

A coffee grinding machine is described, said machine comprising: a first burr; a motor configured to rotate the first burr about a rotation axis; a second burr configured to cooperate with the first burr for grinding coffee beans, wherein the second burr comprises a second surface which, preferably, extends substantially along the outer edge of the second burr, namely in the vicinity of the outer edge of the first burr; a grinder-holder body which can be locked to the second burr, wherein the grinder-holder body comprises a first surface at least partially facing the second surface and cooperating therewith, wherein either one of the first surface and the second surface is a spherical surface, wherein the other one of the first surface and the second surface is a spherical surface, and wherein the first surface and the second surface cooperate with each other so as to suitably orient the first burr with respect to the second burr, before locking the second burr to the grinder-holder body.