Abstract:
Disclosed are an output shaft (1) of a cycloid hydraulic motor and an axle valve flow-distribution cycloid hydraulic motor having same, belonging to the technical field of mechanical transmission. The main body of the output shaft includes a larger-diameter section (1-2) assembled in a casing (10) of the cycloid hydraulic motor and a smaller-diameter section (1-1) extending out of the casing. An engaging structure transmissibly connected with a linkage shaft (21) of the cycloid hydraulic motor is disposed in an inner hole of the larger-diameter section (1-2), and a dynamic engaging portion (1-2-1) is disposed on an external surface of the larger-diameter section for dynamically engaging with the casing (10), the dynamic engaging portion (1-2-1) includes at least two circumferential intermittent oil grooves (1-2-2); a groove bottom of each intermittent oil groove is formed by an eccentric arc about the center O' that deviates from the center O of an excircle of the dynamic engaging portion by a process eccentricity e, the radius R of the eccentric arc is greater than the radius r of the excircle of the dynamic engaging portion. The output shaft and the cycloid hydraulic motor can improve the working efficiency and reduce the manufacture cost, and can form a better oil film, enhance the radial bearing capacity, and ensure the lubrication and seal.
Abstract:
A gerotor hydraulic pressure device (10) using a powder metal wear plate (27) to close off at least one end of a stator/rotor mechanism (40), with the wear plate having an axial length .003" greater than the cavity (28) in the housing (20) that contains it.
Abstract:
A gerotor hydraulic pressure device (10) using a powder metal wear plate (27) to close off at least one end of a stator/rotor mechanism (40), with the wear plate having an axial length .003" greater than the cavity (28) in the housing (20) that contains it.
Abstract:
A rotary valve (10-16) for changing the connection of the fluid inlet passages and the fluid outlet passages (44) of a gerotor type fluid rotary machine in which the fluid is contracted and expanded by a plurality of cavities defined by the teeth (80) formed on a stator (24) and a rotor (56) in response to the orbital rotation of the rotor (56) formed with one less external teeth than the number of the internal teeth (60) on the stator (24). The rotary valve selectively communicates the fluid passages (44) with the gerotor cavities by means of its rotary commutator (10) which orbits with a phase difference of 90° with respect to the gerotor rotor, and the commutator (10) is rotatably accommodated in a spacer (14) disposed between an end cover (18) and a port member (12) havin a plurality of fluid passages (44). The clearance at each side of the commutator (10) is permanently determined by means of the width of the spacer (14). The commutator (10) comprises spaced members (72, 74) that move in unison with radially spaced sealing rings (76, 78) interposed between the two members (72, 74).
Abstract:
A rotary fluid pressure device is disclosed of the type including a gerotor gear set including a ring member (19) and a star member (23). Both manifold valving and commutator valving are accomplished at an interface between an end surface (42) of the star (23) and an end surface (41) of an endcap member (17). The endcap (17) defines three concentric pressure chambers (43), (51) and (47), and the star defines three concentric manifold zones (63), (67), and (65) which are in continuous communication with the pressure chambers (43), (51) and (47), respectively. The various manifold zones (63), (67), and (65) defined by the star communicate with fluid ports (69), (77) and (73), respectively which are also defined by the end surface (42) of the star (23). A valve spool (97) is selectively operable between a first condition providing communication between the manifold zones (63) and (67) to achieve a low-speed, high-torque (LSHT) mode of operation, and a second condition providing communication between the manifold zones (67) and (65) to achieve a high-speed, low-torque (HSLT) mode of operation.