摘要:
A drill press (10) has variable speed drive via belts (52, 58) on stepped pulleys (50, 54, 60) that transfer rotational force from the motor (22) to the drill press spindle (32). Three stepped pulleys (50, 54, 60) connected by two belts (52, 58) are provided in the example. A belt tension roller (68) bears against one of the belts (52, 58) to provide tension for effective power transfer from the motor (22) to the spindle (32). The belt tension roller (68) is adjustable along an arcuate slot (98) in an anchor plate (92) and is fastenable in position by an adjustment knob (94) on the belt tension roller (68). The middle pulley (54) is mounted to vary its position so that tension adjustments on one belt (52) by the belt tension roller (68) result in tension adjustments on the second belt (58) as well.
摘要:
An Improved spindle drive train for rotatably driving the spindle of a machine tool comprises a frame fastened to which is a motor whose shaft extends into the frame. Keyed on that portion of the motor shaft extending into the frame is a pinion gear which is in meshing engagement with one of the gear members of a cluster gear joumaled in the frame for rotation about and transverse movement along an axis parallel to the motor shaft. Journaied into the frame parallel to the cluster gear is the tool-carrying spindle which has a shaft extending coaxially therefrom within the frame. The spindle shaft carries a plurality of gear thereon, each dimensioned to meshingly engage a corresponding cluster gear member, and each is aFigned with one another so that when the spindle is at a predetermined angular orientation, the teeth on each of the gears line up permitting axial shifting of the cluster gear. The gears on the spindle shaft are spaced apart such that as the cluster gear is biased along its axis, one of the gears on the spindle shaft and its complementary cluster gear member engage just as another gear and its complementary cluster gear member disengage, assuring constant synchronism between the spindle and the motor. Motor shaft position is obtained by a resolver fastened directly to the motor shaft, thereby preventing excessive resolver back lash.
摘要:
The invention relates to a machining unit for a machine tool and to a machine tool having such a machining unit. The machining unit according to the invention comprises a head carrier (2), which can be attached to the machine tool, a pivot head (3) held on the head carrier in such a way that the pivot head can be pivoted about a pivot axis (B), a working spindle (6), which is arranged on the pivot head (3) and has a spindle axis (S) that is tilted in relation to the pivot axis (B), a spindle motor (7), which is arranged in the head carrier (2) and has a drive shaft (8) arranged parallel to the pivot axis (B), and a drive transmission for transmitting the rotational motion of the drive shaft (8) of the spindle motor (7) to the working spindle (6), wherein the drive transmission has a transmission stage that can be shifted. The invention is characterized in that the pivot head (3) has a shifting transmission shaft (10), which is oriented coaxially to the pivot axis (B) of the pivot head (3), wherein the transmission stage that can be shifted has a hollow shaft (11) movably supported on the shifting transmission shaft (10) of the pivot head (3).
摘要:
Gegenstand der Erfindung ist eine Spindeleinheit für Fräs und Bohrmaschinen, bestehend aus einem hohlzylindrischen Gehäuse, in dem der hohlzylindrische Stator des elektrischen Antriebsmotors befestigt und in dessen Stirnwänden der mit dem Spindelschaft der Arbeitsspindel in Antriebsverbindung stehende Rotor des Antriebsmotors drehbar gelagert ist. Gemäß der Erfindung ist der Rotor (10) auf einer in den stirnwänden (2, 3) des Gehäuses drehbaren Lagerhülse (12) fest montiert. Der Spindelschaft (18) ist in der Lagerhülse (12) drehbar gelagert und steht über ein Getriebe (21 bis 31) mit dieser Lagerhülse (12) in Antriebsverbindung.
摘要:
Machine de cheminage interne à distance par manchon de l'extrémité de tubes (13) d'échangeurs de chaleur sertis dans une plaque tubulaire (14), comportant un tube flexible (15) reliant un tireur-pousseur à une unité motorisée (16) d'entraînement des outils de fixation du manchon, un chargeur d'outils (25, 26) en tête d'un câble (20) entraîné par le tireur-pousseur, et des moyens pour amener l'extrémité du tube flexible en face de l'extrémité de chaque tube. L'unité motorisée (16) comporte deux moyeux cannelés superposés (30, 33), dont l'un est entraîné par un moteur électrique à faible vitesse, et l'autre par un moteur pneumatique à vitesse élevée.
摘要:
A switchable rotation drive device (1) has a switching mechanism (6) wherein a first connecting sleeve (61) that always rotates integrally with a motor hollow rotor (3), and a second connecting sleeve (61) that always rotates integrally with a planetary carrier (53) of a planetary gear reduction mechanism (5) are connected via a bearing (63) in a relatively rotatable state, and the first connecting sleeve (61) is formed with a sun gear (51). By sliding the switching mechanism (6), the output shaft can be switched between high-speed rotation and low-speed rotation. In comparison to a case in which the entirety of the planetary gear reduction mechanism (5) is made to slide, the sliding region may be smaller, and the required space needed to allow sliding may also be smaller. Therefore, it is advantageous to reduce the size of the device and make it more compact.
摘要:
In a positive feed power drill having a spindle drive gear train and a spindle feed gear train, where a single motor drives both gear trains through separate coupling gears on a common shaft that are engaged while the spindle is advanced to drill through a work piece, and having means for disengaging the feed coupling gear to automatically retract the spindle, provision is made for field adjustment of the differential in the gear ratios of the gear train to adjust the feed rate relative to the drive rate for a particular work-piece material by removing a cap directly over the common shaft for the coupling gears, and replacing at least one of the coupling gears with a gear of the same diameter, tooth height and pitch, but a different number of teeth. The profile of the teeth is modified as the number of teeth is increased, or decreased, in order that smooth meshing of the teeth will be assured with adjacent gears which are not changed.