Abstract: A two-stage machine tool transmission, in particular a spindle drive transmission, includes a planetary gearset in which a spindle or a spindle insert can be connected to a drive output of a transmission, which has a first drive output shaft and the second drive output shaft, such that the first drive output shaft is connected in a rotationally fixed manner to a drive input shaft and can optionally be connected, via a first shift element, to a sun gear of the planetary gearset. The second drive output shaft is connected in a rotationally fixed manner to a carrier of the planetary gearset. A ring gear of the planetary gearset is connected in a rotationally fixed manner to the transmission housing and a second shift element is provided such that a connection between the spindle or a spindle insert and, optionally, the first or the second drive output shaft, is possible.

Abstract: A machine tool gear mechanism (1) such as a spindle gear mechanism, transmits torque from an output shaft (3) of the gear mechanism directly to a spindle (6). The mechanism includes a rotary passage (14) as a device for delivering coolants, emulsions, oils or air between the output shaft (3) or the motor and the spindle (6). The rotary passage (14) is integrated in the spindle (6).

Abstract: A two-stage machine tool transmission, in particular a spindle drive transmission, includes a planetary gearset in which a spindle or a spindle insert can be connected to a drive output of a transmission, which has a first drive output shaft and the second drive output shaft, such that the first drive output shaft is connected in a rotationally fixed manner to a drive input shaft and can optionally be connected, via a first shift element, to a sun gear of the planetary gearset. The second drive output shaft is connected in a rotationally fixed manner to a carrier of the planetary gearset. A ring gear of the planetary gearset is connected in a rotationally fixed manner to the transmission housing and a second shift element is provided such that a connection between the spindle or a spindle insert and, optionally, the first or the second drive output shaft, is possible.

Abstract: A planetary transmission, in particular for machine tools, with a drive shaft that is connected to a sun gear, with an output shaft that is connected to a planetary carrier and with an interior gear, that in a first operating position engages with the housing, and in the second operating position engages with the sun gear, with a hub that surrounds the drive shaft concentrically and with a sliding collar that surrounds the hub concentrically and that engages with the hub in an operating position. The sliding collar (5) engages in the loose end of the interior gear (4) with a centering diameter (7) concentrically located with the hub (6), which in the engaged position of the sliding collar (5) engages with the hub (6) in a concentric position with the hub's axle on its centering collar (8).

Abstract: A machine tool gear mechanism (1) such as a spindle gear mechanism, transmits torque from an output shaft (3) of the gear mechanism directly to a spindle (6). The mechanism includes a rotary passage (14) as a device for delivering coolants, emulsions, oils or air between the output shaft (3) or the motor and the spindle (6). The rotary passage (14) is integrated in the spindle (6).

Abstract: A planetary transmission which has a drive shaft, an axial bearing, an internal gear, an axially displaceable sliding collar and a lubrication circuit and an output shaft which is mounted the transmission housing by an external bearing and an internal bearing. The housing is provided with an oil intake (13) which is connected to an oil line (16) with the external bearing (5) of the output shaft, which is linked by an oil feeding circuit with the axial bearing (9) of the output shaft. The axial bearing (9) is connected with an interior gear bearing by an interior gear (17), the interior gear (17) is encapsulated through a wall section (18). An oil discharge (14) is connected with an oil pump located outside the planetary transmission which, on the other hand, is connected with the oil intake (13).

Abstract: A machine tool transmission, in particular a spindle transmission, with which the force and/or the torque transfer from an output shaft (3) of a transmission (1) takes place directly on a spindle (15). The spindle (15) is placed co-axially over the output shaft (3). An integration of a sealed rotary feed-through is proposed to serve as a transfer device for the flow of cooling fluids, oil or air between the transmission output shaft and the spindle (15).

Abstract: An electromagnetic selection device of a two-stage planetary gear set (1) having one input shaft (2) and one output shaft (3), one sun gear (8), one ring gear (11), one planet carrier (10) with planetary gears (9), one transmission housing (6) and one sliding sleeve (14) for switching one first gear in which the ring gear (11) can be coupled with the housing (6) and one second gear in which the ring gear (11) can be coupled with the sun gear (8), the sliding sleeve (14) being movable by way of one electromagnet consisting of magnet coils (22, 23) and one armature (24). It is proposed that the armature (24) be situated rotatably, but axially fixed, upon the sliding sleeve (14).

Abstract: The machine tool transmission, in particular a spindle transmission, in which the force and torque transfer takes place directly from the pinion shaft (3) of the transmission (1) to the spindle, where the spindle is conveniently arranged in a coaxial configuration with the pinion shaft (3).

Abstract: A planetary transmission, in particular for machine tools, with a drive shaft that is connected to a sun gear, with an output shaft that is connected to a planetary carrier and with an interior gear, that in a first operating position engages with the housing, and in the second operating position engages with the sun gear, with a hub that surrounds the drive shaft concentrically and with a sliding collar that surrounds the hub concentrically and that engages with the hub in an operating position. The sliding collar (5) engages in the loose end of the interior gear (4) with a centering diameter (7) concentrically located with the hub (6), which in the engaged position of the sliding collar (5) engages with the hub (6) in a concentric position with the hub's axle on its centering collar (8).

Abstract: A planetary transmission which has a drive shaft, an axial bearing, an internal gear, an axially displaceable sliding collar and a lubrication circuit and an output shaft which is mounted the transmission housing by an external bearing and an internal bearing. The housing is provided with an oil intake (13) which is connected to an oil line (16) with the external bearing (5) of the output shaft, which is linked by an oil feeding circuit with the axial bearing (9) of the output shaft. The axial bearing (9) is connected with an interior gear bearing by an interior gear (17), the interior gear (17) is encapsulated through a wall section (18). An oil discharge (14) is connected with an oil pump located outside the planetary transmission which, on the other hand, is connected with the oil intake (13).

Abstract: A machine tool transmission, in particular a spindle transmission, with which the force and/or the torque transfer from an output shaft (3) of a transmission (1) takes place directly on a spindle (15). The spindle (15) is placed co-axially over the output shaft (3). An integration of a sealed rotary feed-through is proposed to serve as a transfer device for the flow of cooling fluids, oil or air between the transmission output shaft and the spindle (15).

Abstract: An electromagnetic selection device of a two-stage planetary gear set (1) having one input shaft (2) and one output shaft (3), one sun gear (8), one ring gear (11), one planet carrier (10) with planetary gears (9), one transmission housing (6) and one sliding sleeve (14) for switching one first gear in which the ring gear (11) can be coupled with the housing (6) and one second gear in which the ring gear (11) can be coupled with the sun gear (8), the sliding sleeve (14) being movable by way of one electromagnet consisting of magnet coils (22, 23) and one armature (24). It is proposed that the armature (24) be situated rotatably, but axially fixed, upon the sliding sleeve (14).

Abstract: A two-stage planetary gear drive,-shifting device having an input shaft (1) which is connected with a sun gear (12) and an output shaft (2) which is connected to a planetary gear carrier (15), hollow internal gear (18), of the planetary gear drive, is form-fit, by a slide collar (19), to either a gear drive housing (3) or is coupled to the gear (12). The slide collar (19), is coaxial with the input drive shaft and is slidable into various shift positions by an electrical positioning member (31). It is proposed that the electrical positioning member (31) is an electromagnet, and an armature (33) of the electromagnet is connected, in a driving manner, with the slide collar (19).

Abstract: In a hydrodynamic brake (1), in order to reduce the ventilation losses, adjustable baffles (2, 20) are situated between a rotor (3) and a stator (4). During idling, when oil has been evacuated from the brake (1), one or more baffles (2, 20) of angular cross section in the outer area of the toroidal chambers (31, 41) separate the chambers via a radially inward projecting annular leg (21), a leg cylindrically situated in an axial direction abutting against the inner wall (52) of a chamber (5). During operation of the brake, that is, when the hydrodynamic brake (1) is filled with oil, the radially inward projecting leg (21) is located with its front edge (29) behind the toroidal chambers (31, 41). When only one baffle (20) covering the entire periphery of the outer area of the toroidal chambers (31, 41) is installed, slits (23, 28) are disposed in the radially inward projecting annular leg (21) to obtain the adequate elasticity.