Abstract: A drive system for an industrial vehicle which consists substantially of an electric motor, a two-step transmission and a drive wheel and can be pivotally mounted for movement about a vertical axis in the undercarriage of the industrial vehicle. An axis of the electric motor is arranged parallel with respect to the drive wheel. The transmission can be a two-step spur gearing or a combined toothed belt and spur gearing. A swivel bearing is arranged above the drive wheel, the external race of which swivel bearing is received in the gear housing and the internal race of which swivel bearing is mounted onto a swivel pin extending downwardly from the undercarriage, the axis of said swivel pin lying at least approximately in the center rotational plane of the drive wheel, with the electric motor projecting above the area of the undercarriage having the swivel pin.

Abstract: A gear pump which includes a housing having an internally toothed gear and a pinion meshing with the internally toothed gear disposed therein. The housing has a sickle-shaped space between the two gears and has therein a filler piece. In order to avoid a fluttering of the filler piece and the noises connected therewith, structure is provided for urging the filler piece, due to pressurized oil being guided from the pressure chamber and one side of the filler piece into a bore extending through the filler piece to the opposite side of the filler piece, against the pump housing. The filler piece can also be locked in the direction of rotation by a pressure piece also loaded by the pressurized oil.

Abstract: A shaft support structure for a rotatable shaft having at least one gear thereon, the shaft and gear being oriented in a transmission housing. The shaft is twice supported: once directly on the transmission housing in one opening, and once in a bearing bracket which is provided in a second opening in the transmission housing. The axially spaced openings for the shaft in the transmission housing are out of alignment. However, the support structure in the transmission housing for the shaft provides an axially aligned support for the shaft. The bearing bracket effects a centering of the shaft support in the transmission housing.

Abstract: A method and a machine for the discontinuous generating grinding with indexing of the tooth flanks (14) of gears. The rotating grinding wheel (T) carries out several back and forth feed movements (X) from one axial side face of a tooth to the other. The gear (W) is rotated a small amount (rolling step s) at each change of direction point and the grinding wheel (T) is adjusted in the axial direction (rolling stroke .DELTA.Z). To produce corrections on the tooth flank (14), the grinding wheel can, during the feed movements (X), carry out additional lifting movements (.DELTA.K) in direction of the rolling stroke (.DELTA.Z).

Abstract: A friction clutch for use in a gear changing transmission for facilitating a power transmission from a rotating shaft of a working exhaust-gas turbine onto a crankshaft of an internal combustion engine, which friction clutch, depending on the engine and/or turbine speed, automatically closes in the direction of engagement and opens in the direction of disengagement, with the friction members of the clutch being able to be compressed in the direction of engagement against a spring force (cup springs) by a piston of a rotating cylinder-piston-unit provided on the drive side of the clutch, such that a fluid conveyed from an external pump into the cylinder applies a fluid pressure onto the piston in response to rotation (centrifugal force). The engine lubricant is preferably used as the fluid.

Abstract: An apparatus and a method for the testing of synchronizing devices. In contrast to a conventional apparatus, in which only one rotating transmission gear or rather its synchronizing cone cooperates with a nonrotating synchronizing ring, it is now possible to test a complete synchronizing device consisting of two transmission gears, two synchronizing rings and one gear-shift sleeve with a hub. A transmission gear is fixedly connected to a rigid frame, the other transmission gear is connected to the drive through a drive shaft. The hub with the gear-shift sleeve is coupled with a flywheel mass on the driven side. The flywheel mass on the driven side is during a first shifting operation connected to the drive and is accelerated to the driving speed for testing. The flywheel mass now rotating at the driving speed is then again delayed until standstill through the synchronizing device during a second shifting operation.

Abstract: A scanner head for a tooth-flank scanning device for testing and measuring of gears and similar parts, in particular of gearlike tools having abrasive tooth flanks, is adapted to be introduced into a tooth space of the respective gear or similar part and which can be guided along one of the tooth flanks bordering the tooth space. The scanning piece or insert is formed by the convex surface of a spherical segment, the radius of which is substantially greater than the radius of a ball introducible into the tooth space.

Abstract: A method for the precision working of tooth flanks of hardened workpiece gears (W) utilizing a gear-shaped or rack-shaped tool (T) suited therefor, the tooth flanks (5) of which tool (T) having an abrasive surface, for example a CBN-coating. If such a tool carries out a feed movement relative to the workpiece to be machined, which feed movement is directed perpendicularly to the common normal, however, not in direction of the workpiece axis (4) (i.e. a diagonal feed), then it is important to choose the tool width (b.sub.

Abstract: A machine for the precision working of the tooth flanks of toothed workpieces with a gearlike tool, for example, a shaving gear or the like, which is in a two-flank generating engagement with a workpiece. The workpiece is supported stationarily, however, rotatably on a machine bed and the tool is mounted on a tool head arranged rotationally adjustably about an adjusting axis directed perpendicularly with respect to the tool axis and with respect to the workpiece axis and in a rockable slide member pivotal about a horizontal axis on a cross slide movable in a horizontal direction. The cross slide is guided in a feed slide which is also movable in a horizontal direction. The two directions of movement are offset at 90.degree.. The feed slide is guided in a feed carriage movable in a vertical direction.

Abstract: A method for the precision working of crowned tooth flanks of particularly hardened gears with a two-flank abutment and at crossed axes with an abrasive gear-shaped or rack-shaped tool, in which the tool carries out several back and forth feed movements relative to the workpiece in a direction X extending at an angle .epsilon. inclined with respect to the workpiece axis 4 and a plunge feed movement in the sense of a center-distance reduction. The tool does not have corrected teeth. The crowning is created only at the end of the precision working during at least one back and forth feed movement without a plunge feed movement.

Abstract: A pump 11 is provided in a gear-shift mechanism, in particular a boat reversing gear transmission, in order to supply the hydraulically operated friction clutches with pressurized oil. The pump 11 sucks oil through a fine-mesh filter 19 out of the sump 21. The fine-mesh filter 19 is arranged in a separate filter chamber 12 which is connected through a suction pipe 13, 15 to the sump 21 and to the suction side of the pump 11. The two suction pipes are arranged in such a manner with respect to one another that the filter chamber 12 is always filled with oil. A dry running of the pump 11 during starting is avoided in this manner. The fine-mesh filter 19, in the form of a removable filter cartridge 20, allows the flow of oil from the inside thereof to the outside and is arranged for easy access from above.

Abstract: A friction clutch for gear drives, which friction clutch is constructed as a spring-loaded safety clutch. The gearshift sleeve, which in the sense of the engagement and disengagement, is mounted axially movably and to a limited extent rotatably on the shaft to be engaged. The gearshift sleeve is connected with the shaft through at least one eccentric device rotatable substantially perpendicularly with respect to the axis of the shaft, such that the axial movement of the gearshift sleeve effects in the sense of the engagement both a rotation of the gearshift sleeve relative to the shaft and also the axial additional movement needed to reinforce the contact pressure, whereby the axial additional movement decreases with an increasing relative rotation, and the axial movement of the gearshift sleeve effects in the sense of the disengagement an oppositely directed rotary and axial additional movement, whereby the axial additional movement increases with a decreasing relative rotation.

Abstract: A method and apparatus for the rolling drive of a gear grinding machine. The rotation portion of the rolling movement of the workpiece is effected by roll bands, which at one end are secured to a roll-band carriage movable back and forth with respect to the workpiece axis and at the other end are secured to a roll cam and roll onto and off therefrom. The roll cam and the workpiece are supported on a roll-cam carriage movable back and forth parallel to the roll-band carriage. The roll-band carriage and the roll-cam carriage can be driven at a substantially phase-equal movement. The relationship between the stroke of the roll-band carriage and the roll-cam carriage can be adjusted corresponding with the difference between the diameter of the roll cam and of the workpiece.

Abstract: In a seal arrangement between a stationary and a rotating machine part, for example, between a transmission housing and a hollow sleeve exiting from the housing, there are arranged two V-rings oriented concentrically to one another in the one machine part, the lips of the seals cooperating with the other machine part. To extend the service life of the seal arrangement, a first V-ring is first in an effective position and a second V-ring is supported for movement from a noneffective position (A) into an effective position (B) at a later time by means of a device which can be operated from outside.

Abstract: A shiftable friction clutch, in particular for gear drives, includes a gearshift sleeve axially movably supported on the shaft to be coupled and comprising at least one axially movable friction ring which belongs to one clutch half, which through clutch friction surfaces cooperates with the other clutch half and which is supported on the shaft to be coupled through rolling members to produce a contact pressure depending on the torque by means of sloped surfaces inclined with respect to the plane of rotation. To make shifting easier, in particular the disengagement, the sloped surfaces are provided on at least one element which is rotatable relative to the shaft and which is arranged in a corresponding recess in the shaft and can be moved against a spring force acting in direction of rotation of the shaft.

Abstract: A gearlike dressing tool coated with extremely hard abrasive grains like diamond or CBN. To reduce the manufacturing expenses, not all but only a portion of the teeth is coated. The remaining teeth remain uncoated. The coated teeth lie always directly side-by-side in a peripheral direction and have, including the coating, the same tooth thickness as the teeth which are not coated.

Abstract: Apparatus for the manufacture or working of the tooth system of straight or helically toothed, externally or internally toothed gears with a hyperboloidally or globoidally or similarly formed toothed tool, which has an abrasive surface or the like, wherein a crossed-axes angle is provided. The intermeshed workpiece-tool is guided by a pair of guide wheels. The working takes place on only one flank of a tooth. The workpiece or tool spindle is coupled with a reversible motor. A brake is provided on one of the spindles. A shiftable coupling and additional brakes or centrifugal masses can furthermore be provided.

Abstract: A method and apparatus are provided for manufacturing or machining a gear workpiece with a hyperboloidally, globoidally or similarly formed gearlike tool which has an abrasive or similar surface. The axes of the workpiece and tool are skew lines. During changing of the center distance, in particular as the workpiece and tool are moved apart at the end of the machining operation, the crossed-axes angle is automatically adjusted to conform to the effective rolling circle.

Abstract: A method and an apparatus for the chamfering of the axially facing ends of toothed cylindrical or conical workpieces in which a cutting tool arranged on a rocking lever is moved back and forth in response to the peripheral speed of the workpiece which constantly rotates about its axis. The cutting edge of the tool acts chip-removingly during each stroke that is directed onto or toward the axially facing surface of each tooth of the workpiece. The cutting edge moves along a circular segment path, the axis of which extends at least approximately parallel to a radial of the workpiece, which radial starts out from the workpiece axis and extends through the tooth which is to be worked or machined.

Abstract: A drive unit for a rail vehicle has a motor-gearing unit which is supported on at least one wheel-set axle of a bogie and which includes either a motor which extends in the longitudinal direction of the vehicle and has miter gearing units connected to both ends of a motor which extends parallel to the wheel-set axle and has a spur gearing unit coupled with its drive shaft. Each miter gearing unit or the spur gearing has as its output a hollow shaft which concentrically surrounds the respective wheel-set axle. The hollow shaft is connected to the associated wheel-set axle by an elastic coupling which permits axle dislocations and shaft-angle deviations, and also by an elastic bearing which transmits the weight of the motor-gearing unit to the axle. The elastic bearing can be provided laterally of the gearing unit on the hollow shaft, or can be provided within the hollow shaft.