Abstract:
A piston for use in a reciprocating piston machine having a wobble plate has a first segment and a second segment axially spaced from and aligned with the first segment. A bridge segment connects the first and second piston segments for simultaneous reciprocal movement and at least one body is attached to the bridge segment to connect the piston to a wobble plate.
Abstract:
A hydromechanical drive unit including a swash-plate type hydrostatic axial piston engine having a cylindrical drum located in a housing. A mechanical transmission having a housing connected to the hydrostatic axial piston engine. An output shaft extending through the drive unit having a common axis of rotation with the cylindrical drum. The transmission has an input element non-rotatably connected to the cylindrical drum and an attachment member is located on each end of the output shaft to connect the drive unit to two vehicle axles.
Abstract:
An axial piston motor is provided having a mechanical friction brake incorporated in the driving flange, thereby maintaining the axial length of the motor the same as motors without a mechanical friction brake.
Abstract:
A drive-flange axial piston machine is provided with a drive-flange shaft that is supported in two radial bearings supported at a distance from each other, and an axial bearing, in which case an element transmitting a torque to the shaft, preferably a gear wheel, is located on the drive-flange shaft between the radial bearings, where the axial bearing is located on the side of the element transmitting the torque, which is preferably a gear wheel, facing away from the drive flange in order to achieve as short a structural length as possible and bending-resistant components against which the bearings are supported.
Abstract:
An axial piston pump is provided for producing two output streams that can be regulated independently of each other with respect to size and pressure. A pump according to the invention includes a housing, a revolving cylindrical drum in said housing, a drive shaft connected to said drum for rotating the same, a plurality of spaced holes in said drum on two different pitch diameters generally parallel to the drum axis and opening to a common end face of said drum, a plurality of pistons reciprocable in said holes, a rotary slide control valve acting on the opposite end face of said drum, a first tapered washer or swash plate bearing on one end of said pistons moving in the holes of the smaller pitch diameter, a second tapered washer or swash plate surrounding the first tapered washer and bearing on one end of the pistons moving in the holes of larger pitch diameter, means engaging said first and second tapered washers independently to move them relatively to one another at an angle to the axis of the drum and a pair of separate outlet ports on said rotary valve receiving fluid independently from each of the pistons of different pitch diameter and delivering the same from the pump.
Abstract:
A wheel hub drive includes a stationary hub carrier, a rotational hub, a hydrostatic axial piston motor using the swashplate construction fastened to the hub drive and in a direct drive connection with the hub, and a brake connected directly between the hub carrier and the hub. To achieve the smallest possible dimensions of the hub drive, the axial piston motor has an external bearing cylinder block and a motor shaft that is free of lateral forces and is rotationally synchronously coupled with the hub. The hub has a separate bearing system for mounting in the hub carrier. A bearing system is radially between a central bearing journal of the hub and a bearing segment connected with or formed on the hub. The bearing system is preferably formed of two helical roller bearings in an O-arrangement. The brake is located radially outside and axially inside the area of the bearing system. A flange provided on the hub for fastening at least one wheel rim has a companion drum that covers the brake. The drum engages with the brake and is detachably connected with the flange. The drum can be fixed in its axial position by wheel fastening bolts. The wheel fastening bolts and/or a longitudinal gearing on the outer peripheral surface of the flange and a longitudinal gearing on the inner peripheral surface of the companion drum can transmit the braking moment between the companion drum and the flange. The brake is a wet, hydraulically actuated spring-loaded multiple-disc brake connected to an oil circuit of the axial piston motor. A sealing element is radially between a terminal segment of the companion drum and the hub carrier. The outside diameter of the hub carrier in the vicinity of the terminal segment of the companion drum is greater than the outside diameter of the brake.
Abstract:
A hydrostatic axial piston machine with a swashplate construction formed with an axially short construction. The cylinder block has a plurality of bores received in movable pistons. The pistons are each supported by respective slippers through a slipper joint on a swashplate. The center points of the slipper joints are located in a plane, the intersection point of the plane with the axis of rotation of the cylinder block is in an end surface of the cylinder block that contains the piston exit openings or in an area of the cylinder block that is adjacent to the end surface. The cylinder block is rotationally mounted in the vicinity of the intersection point of the plane with the axis of rotation. The center points of all the slipper joints are preferably located inside the axial extension of the bores in the cylinder block so that transverse piston forces are absorbed direction in the cylinder block. The slipper joints may be connected by a connecting rod with the corresponding slipper. The cylinder block may include an external bearing system connected with a centrally located torque rod.
Abstract:
A module preferably to be used in a machine tool or a machine, in particular in a fork lift truck, has an electric generator and a pump unit, both of which can be powered by an internal combustion engine. The pump unit is located at least partly in an axial recess of the generator housing and is provided to cool the generator. To expand the range of potential applications of the module, the pump unit is a hydraulic pump adapted to supply at least one hydraulic system. The housing of the pump consists of the walls of the generator housing that form the recess and a pump cover that creates a fluid-tight closure for the recess of the generator housing. The pump cover has a suction connection that empties into the recess of the generator housing. At least one distributing valve is integrated at least partly into the pump cover and/or at least one distributing valve is attached to the pump cover. The hydraulic pump is preferably an axial piston pump employing the swash plate principle, and the pump cover is a control base receptacle of the axial piston pump.
Abstract:
A hydrostatic axial piston machine with a swash plate achieves a high power with a compact and simple construction. Two cylinder drums are at some axial distance from one another and are in synchronous rotation. Each drum contains a group of concentric cylindrical borings, between which, and at an angle with respect to the axis of rotation of the axial piston machine there is a rotationally locked circular ring-shaped eccentric disc. The pistons are guided against the disc so that they can move longitudinally in the cylinder bores. Each piston consists of two piston segments having the same diameter oriented coaxially to one another and at some distance from one another. The segments are inserted in cylinder bores which are located opposite one another and are connected to one another by a bridge segment. Two support bodies, one on either side of the eccentric disc, are provided for movement on the eccentric disc along a track. The bridge segments are oriented radially inward toward the axis of rotation (D) of the axial piston machine.
Abstract:
An axial piston machine includes a housing and a rotary shaft is mounted in the housing. A plurality of radially spaced cylindrical bores are arranged concentrically around the shaft and a reciprocal piston is located in each bore. A plate is located at an angle of inclination with respect to the rotary shaft. Each piston is connected to the plate by a support body locator and first and second support bodies are located in the support body locator and are in contact with the opposed surfaces of the plate.