Carl Hurth Maschinen- Und Zahnradfabrik Gmbh & Co.

Hurth Getriebe Und Zahnraeder G.m.b.h

Max Bartl

Richard Strehler

Johann Eichinger

Fritz Diermeier

A spur gear transmission for a drive unit of an industrial truck having an integrated wet running disk brake. A first disk carrier is arranged on one of the spur gears. First braking disks are mounted on the disk carrier. A second disk carrier is fastened in the transmission housing, second braking disks being mounted on the second disk carrier, such that the first and the second braking disks are arranged alternately and cooperate. The spur gear having the first disk carrier is axially movable against the force of a spring by a pressure pin extending through the transmission housing and operable from outside, with the braking disks being pressed against one another between the spur gear and a bearing surface in the transmission housing. A two-arm lever is provided, one lever arm of which can be operated by the driver and the other lever arm of which lever rests on the pressure pin. A hydraulic cylinder with a movable piston therein is housed in the lever arm, movable therewith, and is connected through a pipeline, for example, to a brake pedal, to be operated by the driver. The cylinder yields when the piston is loaded with pressure and operates thereby the pressure pin. Besides this hydraulic brake operation intended for the travelling operation there is also provided a mechanical operation through a cable line, which is, for example, connected to a brake lever, as a locking brake.

Spur gear transmission for a drive unit of an industrial truck with

A spur gear transmission for a drive unit of an industrial truck having an integrated wet running disk brake. A first disk carrier is arranged on one of the spur gears. First braking disks are mounted on the disk carrier. A second disk carrier is fastened in the transmission housing, second braking disks being mounted on the second disk carrier, such that the first and the second braking disks are arranged alternately and cooperate. The spur gear having the first disk carrier is axially movable against the force of a spring by a pressure pin extending through the transmission housing and operable from outside, with the braking disks being pressed against one another between the spur gear and a bearing surface in the transmission housing. A two-arm lever is provided, one lever arm of which can be operated by the driver and the other lever arm of which lever rests on the pressure pin. A hydraulic cylinder with a movable piston therein is housed in the lever arm and is connected through a pipeline, for example, to a brake pedal, to be operated by the driver. The cylinder yields when the piston is loaded with pressure and operates thereby the pressure pin. Besides this hydraulic brake operation intended for the travelling operation there is also provided a mechanical operation through a cable line, which is, for example, connected to a brake lever, as a locking brake.

Spur gear transmission, in particular for a drive unit of an industrial

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.

Device for minimizing flutter of a filler piece in an internal gear pump

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.

Oil supply arrangement for gear-shift mechanism

A drive train for a steerable drive wheel of a vehicle includes a spur gear stage and a bevel gear stage in a drive train housing which is supported for pivotal movement about a vertical axis. The drive wheel is driven through a horizontal axis from a vertically arranged motor. The housing is divided so that the axle-base change of the spur gear stage which is necessary when changing the drive wheel width requires different parts only for the part of the drive train housing which surrounds the spur gears. The remaining part of the drive train housing, which contains the bevel gear stage, is always the same. A slewing ring can be integral with the housing part which surrounds the spur gears. Furthermore, an opening for supplying or discharging air to or from the motor chamber can be provided.

Drive train for a steerable drive wheel of a vehicle

A shiftable friction clutch for gear drives, in which a shift collar is arranged axially movably on a carrier sleeve which is mounted on the shaft which must be coupled to a gear, and in which at least one axially movable friction ring is provided, which belongs to a first clutch half and which cooperates through clutch friction surfaces with a second clutch half and which is supported through rolling elements on the carrier sleeve for producing the contact pressure by means of pressure surfaces which are arranged on the front surfaces remote from the clutch surfaces and which are inclined with respect to the plane of rotation. The friction clutch is constructed as a spring-loaded safety clutch, in which the friction members which are pressed onto one another during the starting or engagement operation are supported against a spring.

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Munich, Germany

Max Bartl