Abstract: A side strut (5) for a lower steering arm of a tractor has a single-action hydraulic cylinder with a cylinder housing (9) and a piston (16). The piston includes a hollow cylinder (17) with a base (18). In the hollow cylinder (17), a rod-shaped element (20) is adjustable against the force of a spring from a moved-in position into a moved-out position. Because the piston (16) and the setting element (20) move in the same direction, it is possible to achieve a telescopic design which leads to a short installation length which, in turn, results in a more advantageous buckling strength.

Abstract: A bearing ring (10) for supporting a protective device of a rotating driveshaft is adapted to engage an annular groove of a component of the driveshaft, for example a joint yoke. The bearing ring (10) has a basic ring portion (13) which connects to a component of the protective device. The bearing ring also includes a bearing ring portion (14) which engages the annular groove. The bearing ring (10) is a composite component. The basic ring portion is produced from a different type of plastics than the bearing portion. The bearing portion (14) is produced by being injection molded around the basic ring portion (13). The bearing portion (14) is a PEEK material. Thus, the bearing portion (14) achieves a long service life while the costs of the bearing remain acceptable.

Abstract: A drive assembly for an agricultural implement (1) has a first implement portion (2) and a second implement portion (3) pivotable relative to the first implement portion (2) around a pivot axis (x). The first implement portion (2) has a first rotary driving device (4) and the second implement portion (3) has a second rotary driving device (5). The two rotary driving devices (4, 5) are rotationally connected to one another by a shaft assembly (6). The shaft assembly (6) includes a universal joint (7) which adjoins the pivot axis (x). The universal joint (7) 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 (19) transfers the shaft assembly (6) into a rotational position where the axis of rotation of one of the two pairs of arms of the universal joint (7) adjoining the pivot axis (x) at least approaches a parallel line relative to the pivot axis (x).

Abstract: A drive (1) for driving, or drives in, agricultural implements, has a drive housing (2) with a first shaft (7) which is rotatably supported around a first axis of rotation (4) in the drive housing (2). A first shaft end (10) of the first shaft (7) projects from the drive housing (2). A first gear (13) is arranged on the first shaft (7). The first gear (13) is axially fixed and rotatable, to a limited extent, relative to the first shaft (7). A second shaft (24) is rotatably supported around a second axis of rotation (20) in the drive housing (2). A first shaft end (27) of the second shaft (24) projects from the drive housing (2). A second gear (29) is firmly connected to the second shaft (24) in the axial direction and in the direction of rotation. The first gear (13) and the second gear (29) engage one another. The selected assembly enables a limited amount of rotation of the first shaft (7), with the second shaft (24) being stationary.

Abstract: The invention relates to an assembly having a universal joint (1) with a first joint yoke (2), a second joint yoke (3), a cross member (4) and a gear (5). The first joint yoke (2) is rotatable around a first axis of rotation (6). The second joint yoke (3) is rotatable around a second axis of rotation (7). The cross member unit (4) articulatable connects the joint yokes (2, 3) to one another. Thus, angles of their axes of rotation (6, 7) are adjustable relative to one another. The gear (5) acts as a drive. The gear (5) is connected in a rotationally fast way to the first joint yoke (2). The gear (5) is arranged co-axially relative to the axis of rotation (6) around the center of the cross member unit (4). Thus, this assembly reduces the size of the angles of articulation of universal joints of a short driveshaft.

Abstract: The invention relates to a device for stabilizing the two lower steering arms (1) of a tractor. The lower steering arms (1) can be actuated by a hydraulic power lift (9). Each lower steering arm (1) is associated with a side strut (6) which includes a single-acting hydraulic cylinder (7) to stabilize and secure the lower steering arm (1). A pre-selection valve (12) and a control valve (13) enable the hydraulic cylinders to be connected to the power lift (9) either via a line or loaded separately by a second pressure source (P2). Thus, independently of the actuation of the power lift (9), the two lower steering arms can be centrally centered by the hydraulic cylinders (7).

Abstract: An assembly with a lower steering arm has a strut 1 and an attaching end 16. To achieve a cost-effective design while at the same time reducing the play between the attaching end 16 and the end of the strut 1 received therein, the attaching end 16 includes a base member 18 and a cover 19. A blocking pawl 34 is supported in the base member 18. The cover 19 is welded to the base member 18 and comprises a stop face 30 for the end face 10 of the strut 1. Thus, any tolerances in the region of the base member 18 provided in the form of a forging do not affect the position of the stop face 30. The latter can be aligned when connecting the base member 18 and the cover 19. Because of its setting contour, the actuating lever 43 can be used for both the right hand and the left hand lower steering arm.

Abstract: A lifting device for lower steering arms of a tractor has a position recording device (25). The position recording device (25) generates a position signal representing the pivot position of the lower steering arms (2, 3). A piston-cylinder unit (11, 12) acts on the tractor and on the lower steering arm (2, 3). A switching circuit is provided per piston-cylinder unit (11, 12). The switching circuit includes a directional valve (33, 33′) with four ports and four switching positions. In a first position of the directional valve (33, 33′) all ports are blocked. In a second position, the cylinder chamber at the piston end is connected to the pressure agent supply source and the cylinder chamber at the piston rod end is connected to the return line. In a third position, the cylinder chamber at the piston rod end is connected to the pressure agent supply source and the cylinder chamber at the piston end is connected to the return line.

Abstract: An assembly with a lower steering arm has a strut 1 and an attaching end 16. The attaching end 16 includes a base member 18 and a cover 19. A blocking pawl 34 is supported in the base member 18. The cover 19 is welded to the base member 18. The cover 19 includes a stop face 30 for the end face 10 of the strut 1. Thus, any tolerances in the region of the base member 18 provided in the form of a forging do not affect the position of the stop face 30. The latter can be aligned when connecting the base member 18 and the cover 19. Because of its setting contour, an actuating lever 43 can be used for both the right hand and the left hand lower steering arm.

Abstract: A device for setting the length of a top link (7) of an attaching device of a tractor (1) has a piston/cylinder unit (14) for length setting purposes. The piston/cylinder (14) has a displacement sensor (20) which records the respective actual length setting of the top link (7). The displacement sensor (20) generates an actual proportional length signal. A lift position sensor (13) is provided which generates an electric signal representing the respective actual lift position of the lower steering arms (4). A nominal length setting of the top link (7), which refers to the respective actual lift position, can be stored in a storage unit (33). When a new actual lift position is reached during the automatic mode of operation, it is possible to generate an electric control signal which corresponds to the nominal length setting of the top link (7). The signal is transmitted to the comparator of a control unit (34). The comparator compares the control signal with the actual length signal.

Abstract: A device for stabilizing the two lower steering arms (1) of a tractor, with the lower steering arms (1) actuated by a hydraulically operated power lever (9). The arms are each associated with a side strut (6) with a first single-acting hydraulic cylinder (7) for stabilizing and fixing purposes. A line connection between the first single-acting hydraulic cylinders (7) and the power lever (9) can be effected by a control valve (13). In order to center the lower steering arms (1) and set the arm to a pre-determined dimension of spread, even when no implement is attached, the line (14) which leads to the second single-acting hydraulic cylinder (10) of the power lever (9) contains a pressure-controlled first return valve. A bypass line (21) with a second return valve (22) is provided to lock in the direction opposite to that of the first return valve.

Abstract: A torque limiting coupling for a driveline for driving agricultural implements has a coupling hub (7) with first recesses (14) which receive adjustable driving members (17). The coupling hub (7) further includes second recesses (15) which include a spring assembly (30). Switching cams (27) of the spring assembly (30) load the associated driving member (17). A coupling sleeve (32) is arranged around the coupling hub (7). Covers (37, 38) laterally seal the unit and laterally guide the coupling hub (7). Sealing rings (47, 48) are provided to render the unit oil-proof. Oil at least partially fills the free space between the components. Thus, the unit ensures in the case overloading occurs, the driving members (17), which engage a groove (34) in the torque transmitting position, cannot return into the groove (34) until a relatively low rotational speed has occurred.

Abstract: 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.

Abstract: A side strut (5) for a lower steering arm (1) of a tractor has a single action hydraulic cylinder (9) whose piston (12) includes first attaching means (6) to be connected to the rear of the tractor. The strut (5) also has a telescopic unit (10) and a setting unit (11). The hydraulic cylinder (9), the telescopic unit (10) and the setting unit (11) are arranged, one behind the other on a longitudinal axis (20). The setting unit serves to achieve a categorical setting and the telescopic unit (10) serves to offset the change in the length of the side strut (5) when the lower steering arm is deflected sideways.

Abstract: A protective device for a driveshaft (1), with two universal joints (2, 3) has a protective cone (6) associated with the first universal joint. The protective cone (6) has an extension in the form of a cone portion (14). A sleeve (15) is received in a rotationally fast way in the cone portion (14). The sleeve (15) cooperates with an adapter ring (21). The adapter ring (21) is stationarily secured to an agricultural implement. The sleeve (15) is positioned on the adapter ring (21). The sleeve has inwardly directed splines which engage correspondingly distributed grooves (23) in the outer face of the adapter ring (21) which achieve a rotationally fast connection. The protective device also includes a first protective tube connected to the first protective cone (6). The first protective tube is associated with a second protective tube of the second universal joint in a rotationally fast way. The second tube is firmly connected to the second protective cone by an attaching cap.

Abstract: A lubricating device (13) for a telescopic shaft has a lubricating element and a reservoir. The lubricating device (13) is inserted into a cavity (18) of the inner profiled tube (7). The lubricating device (13) serves to lubricate the surface portions of the outer and inner profiled tubes (6, 7), which slide on one another. Thus, it is possible to achieve permanent lubrication.

Abstract: An angle drive, especially for agricultural implements, has a housing with two housing portions (1, 2). The two housing portions (1, 2) abut one another at a right angle. The angle drive is provided with a first bevel gear (11) arranged in the first housing portion. A second bevel gear (27) is arranged in the second housing portion. The two bevel gears (11, 27) are each supported by rolling contact bearings (16, 17, 33). The housing interior is sealed by seals (20, 20') between the first bevel gear (11) and the first housing portion (1) and between the second bevel gear (27) and the second housing portion (2). The two housing portions (1, 2) which concentrate on merely covering the outlines of the two bevel gears (11, 27) and provide an aperture (25) in the region of abutment between the two housing portions (1, 2), in which the two sets of teeth (14, 18) engage one another, produce a compact unit with a small enclosed volume.

Abstract: A driveshaft has two shaft parts (4, 6) which provide a coupling. To facilitate the operation of coupling the two shaft parts (4, 6) to one another, the coupling operation is divided into two phases. A member initially aligns the two shaft parts (4, 6) along a common longitudinal axis (13). Also, the shafts are rotationally fast connected between the shaft parts. A centering journal (20) centers the two shaft parts (4, 6) relative to one another on a common longitudinal axis (13). The centering journal centers the bore (16) of the first profiled tube (12) with a relative rotation of the two shaft parts (4, 6) continuing to be possible. When inserting the two shaft parts (4, 6) into one another, the first coupling part (19), which is firmly connected to the first profiled tube (12), via its claws approaches the claws of the second coupling part (40). The second coupling part (40) is displaceable on the second profiled tube (28) via a setting sleeve (34) against the force of a spring (38).

Abstract: A torque limiting coupling, in drive lines or driving agricultural machinery has a first coupling part (1) and a second coupling part (14), as well as a switching ring (19) loaded by a spring (28). Balls (30) transmit torque between the first coupling part (1) and the second coupling part (14). The balls are axially adjustable in apertures (6) of the first coupling part (1). The apertures (6) are uniformly circumferentially distributed around the axis of rotation (2). In the torque transmitting position, the apertures (6) are positioned opposite torque transmitting recesses (16) in the second coupling part (14). The balls (30) are held in recesses (16) in the engaged condition by the switching ring (19). When the torque is exceeded, the balls (30) escape out of the torque transmitting recesses (16). In the course of this process, the switching ring (19) is first displaced against the force of the loading spring (28).

Abstract: A lifting rod for the lower steering arm of a tractor, at the ends of the lifting rod, has connecting elements in the form of a connecting yoke 6 and a ball joint 7. The connecting yoke 6, via a threaded rod 9, is threaded into a threaded bore 10 of a tubular rod element 11. The rod element 11 is received in the housing bore 21 of the housing 8 and is movable along the longitudinal axis 17. The rod element 11 and the housing 8 are able to assume two different positions relative to one another, with the lifting rod length being fixed in one of the two positions. In the other position, both may assume a floating relationship relative to one another.