The present invention is an apparatus, system and method for use of a mud motor having a bearing assembly a transmission or coupling assembly, a power section, a rotor catch assembly, and a cross over sub-valve wherein the transmission assembly may have a torque and thrust transfer coupling with a safetied joint for contacting universal style joints.

Packaging for transmissions with an epicyclic gearbox speed reducer and oil pump is provided. Packaging comprises an epicyclic/planetary gearbox or single stage gear reducer with a sun gear, ring unit, and one or more planetary gears on the ring unit, and an oil pump located inside the packaging. The oil pump may be driven directly by a carrier, or driven by a carrier using a gear stage set. This configuration provides a tighter packaging of the full assembly of an epicyclic/planetary gearbox for transmissions with an internal oil pump, which reduces the weight of the unit, provides lubrication, and avoids splashing. The pump packaging may also be particularly valuable for electric vehicle (EV) independent motor applications.

An eccentric screw pump, comprising a rotor that extends along a longitudinal axis of the rotor from a drive end to a free end, a stator housing with an internal cavity that extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and that is designed to accommodate the rotor, a drive motor with a drive shaft that is coupled with the rotor to transmit a torque, a first cardan joint which is placed within the transmission of the torque between the drive shaft and the rotor, and a stator outlet flange that is arranged in flow direction behind the rotor. The stator outlet flange comprises a flange connection plane that is oriented non-vertically to the longitudinal axis.

The present invention relates to a gear pump (10) with at least three gear wheels (12, 14, 16), which are arranged in a pump housing (18), and a drive shaft (20). With such a device, in which the at least three gear wheels (12, 14, 16) are arranged radially adjacent to one another, and wherein a pump is formed by in each case two adjacent ones of the at least three gear wheels (12, 14, 16) and wherein one of the at least three gear wheels (12, 14, 16) can be driven by the drive shaft (20), a multiple pump is described which is more compact in construction than the known prior art and has a greater level of efficiency. Furthermore, considerable potential savings in system costs result from this.

A torque transfer device for a powertrain of a vehicle includes a shaft, a pump, and an actuator. The shaft transfers torque from a drive source to a wheel of the vehicle. The pump includes a rotary component and a housing that surround the shaft. The rotary component is selectively coupleable to the shaft to be rotated thereby to operate the pump. The actuator includes a cam mechanism that selectively couples the rotary component to the shaft.

A novel rotating body, its material, and manufacturing method thereof, shortening a distance for cutting a bore surface in its axial direction, reducing processing costs, enabling lower-cost manufacture of inner rotor. A metallic rotating body 11 has a bore surface 12 for press-fitting a shaft thereinto, including a cutting-processed portion 13 at first end and an unprocessed portion 14 at second end. The processed portion 13 has an inner diameter formed smaller than the unprocessed portion 14. A chamfer 15 at first end of the bore surface 12 is cut, while a chamfer 6 at the second end not. A bore surface 2 of material 1 processed into the rotating body 11 includes a small-diameter portion 3 at first end and a large-diameter portion 4 at second end. A step 5 is formed between the small- and large-diameter portions 3, 4, with the chamfer 6 formed at second end.

A coupling element for connecting a helix-shaped eccentric screw pump rotor to a drive shaft, with a drive shaft receiving portion and a rotor connecting portion arranged opposite, which is constituted as a hollow cylinder for receiving a rotor end, wherein the hollow cylinder has at least two inner circumferential surfaces which are complementary to the rotor and have a radius which is fixed with respect to the cross-sectional center of the hollow cylinder.

There is provided a pump unit capable of shortening the overall length thereof and maintaining mechanical efficiency even after long-term use and also to provide an actuator having such a pump unit, the pump unit (U) includes a hydraulic pump (P), a motor (M), a coupling (8) coupling a drive shaft (2) of the hydraulic pump (P) and a shaft (7) of the motor (M), a holder (H) having a housing portion (L) that is hollow and houses the coupling (8), and an introduction passage (D) that guides the hydraulic oil to the housing part (L).

A vane oil pump includes a rotor including a plurality of slits, a housing having an inner circumferential cam surface such that a first pump unit and a second pump unit taking in and discharging oil in accordance with rotation of the rotor are separately disposed in a rotational direction of the rotor, a plurality of vanes respectively fitted in the slits of the rotor, and a pressure adjusting device configured to adjust a second discharge pressure of the second pump unit to a lower pressure than a first discharge pressure of the first pump unit. A back pressure groove is disposed on the housing and is provided to supply back pressure oil to a bottom portion of each slit.

Packaging for transmissions with an epicyclic gearbox speed reducer and oil pump is provided. Packaging comprises an epicyclic/planetary gearbox or single stage gear reducer with a sun gear, ring unit, and one or more planetary gears on the ring unit, and an oil pump located inside the packaging. The oil pump may be driven directly by a carrier, or driven by a carrier using a gear stage set. This configuration provides a tighter packaging of the full assembly of an epicyclic/planetary gearbox for transmissions with an internal oil pump, which reduces the weight of the unit, provides lubrication, and avoids splashing. The pump packaging may also be particularly valuable for electric vehicle (EV) independent motor applications.