Abstract:
A hydromechanical transmission which includes a swash-plate type hydrostatic axial piston motor with a rotary cylindrical drum having work cylinders and a driven shaft. A planetary gear is located adjacent to and coaxial with the piston motor and includes a rotary hub surrounding both the planetary gear and the axial piston motor, A ring gear is located at the inner surface of the rotary hub and a stationary hub support having an open ended cavity to hold the axial piston motor is mounted within and coaxial with the rotary hub. The end wall of the cavity is a control surface for the axial piston motor and pressure medium channels which open on the control surface for periodic connection with the work cylinders in the cylindrical drum are formed in the stationary hub support.
Abstract:
A shiftable planetary transmission having a housing, a non-rotatable or rotatable transmission component, a sun gear, a carrier and at least one planet gear mounted on the carrier. A rotatable ring gear is connected to the non-rotatable or rotatable transmission component. The ring gear has an annular surface facing the interior surface of the transmission component and a coupling arrangement is non-rotatably connected to the ring gear and a spring-loaded hydraulic activation mechanism is located within the ring gear to axially move the coupling arrangement.
Abstract:
A pump unit includes two main variable displacement axial piston pumps with coaxial input drive members. A power input shaft to the pump unit is mounted for rotation in the housing along an axis perpendicular to the common axis of the main pump drive members. A first bevel gear mounted within the housing on the power input shaft meshes with a second bevel gear which is rotatable about the common axis of the main pump drive members and drivingly connected with at least one of the pump drive members. The housing has at least one flange defining a surface on which an auxiliary pump may be mounted. The auxiliary pump has an input shaft which extends through an opening in the housing defined by the flange. A third bevel gear is mounted on the auxiliary pump input shaft from inside the housing and meshes with the second bevel gear. The pitch diameter of the second bevel gear is greater than the pitch diameters of the first and third bevel gears so that the tips of the teeth of the third bevel gear clear the tips of the teeth of the first bevel gear. It is contemplated that the housing could be provided with three flanges each lieing in a plane parallel to the common axis of the main pump drive members. Two of the flanges are also parallel to the axis of the input drive member and the third is perpendicular to the axis of the input drive member.
Abstract:
An axial-piston machine, such as an axial-piston pump or an axial-piston motor, in which the cylinder drum is in engagement with an intermediate disk which bears, in turn, upon the housing and has a spherically curved surface whose center of curvature is spaced to the side of the axis of rotation of the drum at which the pressure passage communicates with the cylinder drum.
Abstract:
For tractors or like machines which can be provided, upon assembly, with either a hydrostatic transmission or a mechanical stepped-speed transmission, a transmission housing having a removable cover is provided. The machine has a drive shaft and a driven shaft and, according to the invention, a hydrostatic transmission is mounted intact upon the cover for introduction into and removal from the housing with this cover. The hydrostatic transmission comprises an inclined-disk variable-displacement pump whose input shaft is connected to the drive shaft and a hydraulic pump of the drive-flange type hydraulically connected to the pump and having an output shaft which is, in turn, connected to the driven shaft.
Abstract:
An axial piston machine with a variable or adjustable stroke comprises a rotatable cylinder drum provided with annularly spaced cylinder bores each of which receives a piston reciprocal in its bore parallel to the axis of rotation of the drum and with a stroke determined by the extent of tilt of a guide surface about an axis perpendicular to the axis of rotation of the drum. The piston stroke is controlled by a rocker carrying the control surface and hydraulically displaceable in the machine housing by application of hydraulic fluid pressure directly to the rocker.
Abstract:
A self-supporting drive module has a support component (1) in which at least one electric motor (2 or 3 or 6) is located. To facilitate the manufacturing process, the electric motor (2 or 3 or 6) is a prefabricated motor module having a separate motor housing (2a or 3a or 6a). The support component (1) can be a drive axle, with at least one drive wheel located on each end of the axle.
Abstract:
An axial piston machine with a swashplate and a cylinder block provided with a torque transmission member is rotationally mounted by a bearing system located radially between the cylinder block and a housing. To achieve compact dimensions and an improved supply of hydraulic fluid, the cylinder block and the swashplate are penetrated centrally by two plain coaxial conduits that are connected on the swashplate-side ends to hydraulic fluid supply channels and emerge on the cylinder-block-side ends in a control body which has a control surface that interacts with the cylinder block. The control body is located inside the cylinder block. The plain conduits are supported in a swashplate mounting and in the cylinder block. The axial piston machine is preferably realized in the form of a wheel motor.
Abstract:
A hydrostatic axial piston machine has a cylinder block with bores holding reciprocating pistons, a swashplate supporting the pistons, and control cams to supply the bores with hydraulic fluid. The swashplate is a pivoting cradle mounted on friction bearings in a cradle receptacle. Hydraulic fluid channels empty into the cradle receptacle and are in communication with supply channels in the cradle connected to the control cams. An actuator piston to adjust the cradle is located between two friction bearing segments of the cradle receptacle and has a toothed rack segment engaging a gearing segment on the back side of the cradle.
Abstract:
A hydrostatic motor unit designed as a wheel drive comprises at least two hydraulic motors, at least one of which has a variable capacity. The hydraulic motors can be switched hydraulically in parallel and have output rotors that can be coupled with each other. The invention teaches that the output rotors are oriented coaxially to one another and are connected to each other in rotational synchronization. The output rotors are preferably part of a one-piece rotor block that contains the work chambers of the two hydraulic motors. The motor unit consists of an internally pressurized, in particular multiple-stroke radial piston motor that has a constant capacity, and a reversible axial piston motor utilizing the swash plate construction that has an adjustable capacity. From a common, axially oriented control surface for the radial piston motor and the axial piston motor, there are hydraulic channels of approximately the same length that lead to the work chambers of the hydraulic motors. The control surface provided with pressure equalization grooves is formed on an axially movable control body, which can be pressed by spring force and hydraulic pressure toward a counter surface located on the rotor block. The rotor block is penetrated by a central recess, in which there are hydraulic lines that emerge in the control surface.