A table assembly for a machine tool is provided. The table assembly has a slide, a rotatable table and a table rotation mechanism placed on board the slide and adapted to be driven to rotate the table about a vertical axis. The table rotation mechanism has at least one rotation assembly engaged with a ring gear of the table. The at least one rotation assembly has a torque motor having a vertical motor axis and a reduction gear having an inlet engaged with the torque motor, and an outlet pinion engaged with the ring gear of the table, coaxial to the motor axis. The machine tool is a milling machine or a gantry boring machine.

A table assembly for a machine tool is provided. The table assembly has a slide, a rotatable table and a table rotation mechanism placed on board the slide and adapted to be driven to rotate the table about a vertical axis. The table rotation mechanism has at least one rotation assembly engaged with a ring gear of the table. The at least one rotation assembly has a torque motor having a vertical motor axis and a reduction gear having an inlet engaged with the torque motor, and an outlet pinion engaged with the ring gear of the table, coaxial to the motor axis. The machine tool is a milling machine or a gantry boring machine.

A tool coupling device for coupling a tool can comprise a drive shaft for coupling to the drive, an output shaft for coupling to the tool, the output shaft being rotatable about a central axis (A), a transmission unit connected between the drive shaft and the output shaft and translating a rotational movement of the drive shaft at an input speed (n.sub.S) into a rotational movement of the output shaft at an output speed (n.sub.W) greater than the input speed (n.sub.S) and a non-rotating housing, wherein the transmission unit, and at least a part of the input shaft and a part of the output shaft that are both coupled to the transmission unit, are arranged within the housing, wherein the drive shaft is rotatably mounted on the housing; and wherein the output shaft is rotatably supported solely on the input shaft and is not rotatably supported on the housing.

This machine tool includes a spindle, a workpiece support section that supports the workpiece, a servo motor that rotates or moves workpiece support section relative to the spindle, and a control device that controls the servo motor, where the control device displays an adjustment screen for adjustment of at least either of a gain and a filter of the servo motor on a display device when the control device recognizes that the servo motor is newly mounted, when a machining program of the workpiece is changed, or when an operation value of the servo motor or a value calculated based on the operation value deviates from a predetermined criterion.

This machine tool includes a spindle, a workpiece support section that supports the workpiece, a servo motor that rotates or moves workpiece support section relative to the spindle, and a control device that controls the servo motor, where the control device displays an adjustment screen for adjustment of at least either of a gain and a filter of the servo motor on a display device when the control device recognizes that the servo motor is newly mounted, when a machining program of the workpiece is changed, or when an operation value of the servo motor or a value calculated based on the operation value deviates from a predetermined criterion.

A transmission structure of a woodworking lathe contains: a case, a driven gear, a first gear set, a second gear set, and an adjustment lever. The case includes a transmission shaft, a variable speed shaft, and a driven shaft. The driven gear is fixed on the variable speed shaft and meshes with the transmission gear. The first gear set contains a first gear and a third gear which is coaxial with the first gear. Diameters of the first gear and the third gear are different. The second gear set is disposed on the variable speed shaft and contains a second gear and a fourth gear, a diameter of the second gear corresponds to a diameter of the first gear, and a diameter of the fourth gear corresponds to a diameter of the third gear. The adjustment lever is defined between the second gear and the fourth gear.

A transmission structure of a woodworking lathe contains: a case, a driven gear, a first gear set, a second gear set, and an adjustment lever. The case includes a transmission shaft, a variable speed shaft, and a driven shaft. The driven gear is fixed on the variable speed shaft and meshes with the transmission gear. The first gear set contains a first gear and a third gear which is coaxial with the first gear. Diameters of the first gear and the third gear are different. The second gear set is disposed on the variable speed shaft and contains a second gear and a fourth gear, a diameter of the second gear corresponds to a diameter of the first gear, and a diameter of the fourth gear corresponds to a diameter of the third gear. The adjustment lever is defined between the second gear and the fourth gear.

A transmission structure of a drilling machine contains: a housing, a drive shaft, a drive gear, a guide gear, a speed change gear assembly, a driven gear assembly, and a control knob. The housing include a first accommodation groove for housing the drive shaft, a second accommodation groove for accommodating the guide shaft, a third accommodation groove for housing the speed shaft, and a fourth accommodation groove for accommodating the driven shaft. The drive gear is connected on the drive shaft, and the guide gear is coupled on the guide shaft and meshes with the drive gear. The speed change gear assembly includes a connection gear and at least two speed change gears. The driven gear assembly includes at least two driven gears corresponding to at least two speed change gears respectively. The control knob configured to drive the driven gear assembly to move upward and downward.

A transmission structure of a drilling machine contains: a housing, a drive shaft, a drive gear, a guide gear, a speed change gear assembly, a driven gear assembly, and a control knob. The housing include a first accommodation groove for housing the drive shaft, a second accommodation groove for accommodating the guide shaft, a third accommodation groove for housing the speed shaft, and a fourth accommodation groove for accommodating the driven shaft. The drive gear is connected on the drive shaft, and the guide gear is coupled on the guide shaft and meshes with the drive gear. The speed change gear assembly includes a connection gear and at least two speed change gears. The driven gear assembly includes at least two driven gears corresponding to at least two speed change gears respectively. The control knob configured to drive the driven gear assembly to move upward and downward.

This machine tool includes a spindle, a workpiece support section that supports the workpiece, a servo motor that rotates or moves workpiece support section relative to the spindle, and a control device that controls the servo motor, where the control device displays an adjustment screen for adjustment of at least either of a gain and a filter of the servo motor on a display device when the control device recognizes that the servo motor is newly mounted, when a machining program of the workpiece is changed, or when an operation value of the servo motor or a value calculated based on the operation value deviates from a predetermined criterion.