Gkn Walterscheid Gmbh

Bibus Hydraulik Ag

Eberhard Wilks

Andreas Sarfert

Paul Herchenbach

Clemens Nienhaus

Felix Mikeska

Martin Hector

Wilhelm Schott

Peter Dziuba

Manfred Eidam

Holger Jung

Bernd Carstensen

Gottfried Kohnen

Wolfgang Wiest

Andreas Lohm&uuml;ller

Reinhold Walter

A drive assembly for vehicles with front wheels and rear wheels, especially for tractors, agricultural machinery, construction machinery or for self-driving machines, has an engine (), a first drive () to drive the rear wheels, a second drive () to drive the front wheels, an adjustable hydraulic pump () driven by the engine (), and an adjustable first hydraulic motor (). The first hydraulic motor (), with respect to drive, is connected to the first drive () to drive the rear wheels. Also, the first hydraulic motor, with respect to drive, may be connected to the second drive (), to drive the front wheels. A second hydraulic motor (), with respect to drive, can be connected to the second drive () to drive the front wheels. The first hydraulic motor () has a high coefficient of efficiency within a first driving speed range of the vehicle. The second hydraulic motor () has a high coefficient of efficiency within a second driving speed range of the vehicle. The first driving speed range is above the second driving speed range, with both driving speed ranges overlapping.

Drive assembly for four-wheel drive vehicles

A torque limiting coupling has a first coupling hub () with first driving members (), and a second coupling hub () with second driving members (). The hubs () are jointly received in a coupling sleeve () and are rotatable independently of one another. When a set torque is exceeded while the first coupling hub () is driven in one of two driving directions of rotation Nor N, the second coupling hub () is subjected to a force which ensures that, in the driving direction of rotation N, the driving members () of the first coupling hub () are transferred into the disconnected position and that, in the driving direction of rotation N, the second driving members () of the second coupling hub () are transferred into the disconnected position.

Torque limiting coupling

A device for measuring torque and the direction of rotation in a drive assembly, has a torsion element ( ) which can be torque-loaded and rotatingly driven for the purpose of transmitting torque around an axis of rotation ( ). A first transmitter element ( ) attached in a rotationally fast way to the torsion element ( ). The first transmitter element ( ) is moved on a first rotational circle. A second transmitter element ( ) is positioned at a reference distance from the first transmitter element The second transmitter element ( ) is connected in a rotationally fast way to the torsion element ( ) and is moved on a second rotational circle. A sensor unit is fixed and arranged at a distance from the axis of rotation ( ). The sensor unit ( ) senses the passage of the transmitter elements or of a reference edge or a reference surface and generates a corresponding sequence of signals. The transmitter elements generate signals of different lengths and, within the relevant measuring range, signal intervals of different lengths between the signals. An evaluation unit ( ) receives the signals. The evaluation unit ( ) determines the torque applied and the direction of rotation from the distance in terms of time between the signals.

Device for measuring torque and the direction of rotation in a drive assembly

A device for measuring torque in a drive assembly includes a torque-loaded torsion element ( ), such as a shaft, and a reference element ( ) surrounding the torsion element ( ). The reference element is correspondingly tubular in shape. A first tube end ( ) of the reference element ( ) is firmly connected to a first shaft end ( ) of the torsion element ( ). A second tube end ( ) of the reference element ( ) is supported on the second shaft end ( ) of the torsion element ( ). The two tube ends ( ) are each associated with a transmitter element ( ). The relative position of the transmitter elements ( ) in the direction of rotation around the rotational axis ( ) is recorded by a sensor element ( ). The sensor ( ) is associated with a housing ( ). The sensor ( ) generates a signal each time the two transmitter elements ( ) pass and transmits signals to an evaluation unit ( ). The evaluation unit ( ) determines the torque applied from the offset of the signals.

Device for measuring torque in a drive assembly

A centered double universal joint has a first outer joint yoke with first outer yoke arms connected to one another by a first bridge A first cenering mechanism is on the first bridge A first inner joint yoke couples with the first inner yoke arms. A first cross member connects the first outer yoke arms to the first inner yoke arms. The first cross member has a first lubricant supply A second outer joint yoke with second outer yoke arms are connected to one another by a second bridge Second centering mechanism is on the second bridge A second inner joint yoke couples with the second inner yoke arms. A second cross member connects the second outer yoke arms to the second inner yoke arms. The second cross member has a second lubricant supply A guiding disc defining a longitudinal axis has a first central centering projection articulatably connected to the first centering means Guiding faces on the guiding disc are guided in an annular recess of a housing The annular recess is delimited by a first sealing face and by a second sealing face A first lubricating groove in the first sealing face is connected to the first lubricant supply A second lubricating groove in the second sealing face is connected to the second lubricant supply

Centered double universal joint

A coupling assembly for agricultural implements has a friction coupling ( ), an electromagnet ( ) and control mechanism ( ). The friction coupling ( ) includes a friction assembly ( ) which is loaded by a pressure plate ( ). The pressure plate ( ) is loaded by pressure springs ( ). The pressure plate ( ) is adjustable by an actuating device ( ) which includes an electromagnet ( ) and an anchor plate ( ). The control mechanism ( ) includes a control member ( ) which, by changing the electric current, regulates the pressure force of the pressure plate ( ) during the coupling and/or uncoupling operation. The housing ( ) and the hub ( ) are associated with speed sensors ( ) which transmit a signal to the control mechanism ( ) to relieve the load on the friction assembly. Thus, this prevents the friction coupling ( ) from overheating.

Coupling assembly for agricultural implements

A drive assembly for an agricultural implement ( ) has a first implement portion ( ) and a second implement portion ( ) pivotable relative to the first implement portion ( ) around a pivot axis (x). The first implement portion ( ) has a first rotary driving device ( ) and the second implement portion ( ) has a second rotary driving device ( ). The two rotary driving devices ( ) are rotationally connected to one another by a shaft assembly ( ). The shaft assembly ( ) includes a universal joint ( ) which adjoins the pivot axis (x). The universal joint ( ) includes a cross member with two pairs of arms centered on axes of rotation arranged perpendicularly relative to one another, and two joint yokes. A force-operated setting device ( ) transfers the shaft assembly ( ) into a rotational position where the axis of rotation of one of the two pairs of arms of the universal joint ( ) adjoining the pivot axis (x) at least approaches a parallel line relative to the pivot axis (x). This design enables a pivot movement of the second implement portion ( ) relative to the first implement portion ( ). A pivot angle is present ranging between 100&deg; and 110&deg;. The implements pivot without the joint yokes of the universal joint ( ) contacting one another and without the universal joint ( ) being destroyed as a result of any jamming and distortion.

Drive assembly with a setting device

A protective device for a drive assembly with a double universal joint (1) has a protective cone (10) with folds (15). At the cone's first axial end (11), it is secured to a bearing assembly (12). At its second axial end, the cone (10) includes a fixing portion (14) which is connected to a guiding ring (18). The guiding ring (18), via its inner end (21) projects into the part of the protective cone (10) which is provided with the folds. The guiding ring (18) itself is supported on a bearing ring (23). The bearing ring (23), in turn, is supported on an inner double yoke (5). An axial relative movement is permitted between the guiding ring (18) and the bearing ring (23). The guiding ring (18) ensures that the protective cone (10), with the folds (15), is well supported under articulation conditions. Furthermore, the protective cone (10) with its folds (15) has a relatively long length without losing any of its stability.

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Daufenbach, Germany

Eberhard Wilks