A linear drive assembly configured for use within a power end assembly. The linear drive assembly is configured to interconnect a crankshaft and a pony rod and comprises a crosshead assembly attached to a connecting rod assembly. In one or more embodiments disclosed herein, the connecting rod assembly is configured to attach to opposite sides of the crosshead assembly so that no portion of the connecting rod assembly is disposed within an interior of a crosshead included in the crosshead assembly.

A gear unit includes a housing, a trough for guiding oil and reducing losses due to splashing surrounding a circumferential section of a toothing part, particularly a gear wheel, especially in the radial and axial direction. The trough includes at least three parts, e.g., at least one bottom plate and two side walls, the bottom plate being screw-connected to the two side walls. The trough is fastened to the housing and includes an opening, particularly a channel, especially at its lowest surface area, e.g., particularly at the surface area having the greatest radial distance. In particular, during rotational movement of the gear wheel, oil is conveyed from the oil pan of the gear unit through the opening between the trough and gear wheel, especially to a position higher than the level of the oil pan. The bottom plate and the side walls are stamped bent parts.

A transmission system may include a first bevel gear, a second bevel gear and a baffle. The second bevel gear is meshed with the first bevel gear, and includes a plurality of gear teeth arranged in a circumferential array. The baffle includes a baffle wall and a baffle outlet. The baffle wall is arranged next to and covers a subset of the gear teeth. The baffle outlet forms a lubricant outlet passage that extends through the baffle wall.

A strain wave gear system (10) includes first and second sets of ball bearings (80, 82) located intermediate a flange (84) and a retainer plate (88) rotatable with an output (54) and a radially oriented flat disc (74) of the input including strain relief (76). Strain relief (76) is a helical slot in a coupling (70) located radially within the wave generator (94) and the ring gear (22). The ring gear (22) is sealed by a sealing system including sealant (42) forced by a protrusion (34) of the cap (24) entering into a cavity (36) through a channel (40) into a relief volume (38) of the housing (12). The bearing (48) rotatably mounting the housing (12) to the output (54) is lubricated by a lubricating system including plungers (110) threadably received in axial bores (102) intersecting with radial bores (104) in communication with radial holes (47) of the bearing (48).

A power transmission apparatus includes a first electric motor, a power split mechanism, a second electric motor, a case, a support wall, and a breather mechanism. The case accommodates the first electric motor, the power split mechanism, and the second electric motor. The support wall is provided between the power split mechanism and the second electric motor. The breather mechanism is located in a rotational angle range that is at least equal to 90 degrees and is smaller than 180 degrees. The breather mechanism has a through hole and a breather chamber. The breather chamber is provided at a case inner side end of the through hole and is opened in a direction that does not oppose a virtual surface that passes through the rotational axis at a rotational angle of 90 degrees of the second electric motor.

The invention relates to a gearbox including a first shaft, a second shaft, an intermediate shaft transmitting the movement from the first shaft to the second shaft and a casing delimiting a chamber, the first shaft and the second shaft each extending at least partially outside the casing, the intermediate shaft being accommodated in the chamber and comprising a first gearing element cooperating with the first shaft and a second gearing element cooperating with the second shaft.

The first shaft and the intermediate shaft are arranged at a first height, the second shaft being arranged at a second height lower than the first height, and the gearbox includes a splash tub containing a lubricant, the first gearing element being at least partially submerged in the splash tub.

A technique that can efficiently reduce the number of oil bubbles. An oil-bubble reducing structure that is arranged in an automatic transmission includes: a filter that is arranged in an oil path for oil flowing through the automatic transmission, wherein the filter has pores formed in its framework having a polygonal cross section.

A lubrication system for fluid circulation and delivery to specific components in ball planetary continuously variable transmissions contained in spinning hubs. A tube has a first end extending radially outward into a fluid volume maintained by inertia caused by the spinning shell and a second end extends radially inward near a component. An orifice is positioned near an interior surface of the hub shell and an opening is positioned near the component, such as a sun bearing, planet axle, or other rotating component. As the shell rotates, fluid rotating with the shell enters the orifice and is forced along the tube to the opening, where it exits to lubricate the selected component or components. A circumferential groove in the hub shell collects fluid for controlling fluid flow into the tube, reducing the volume of fluid needed in the CVT.

An axle drive for a vehicle includes at least one drivable vehicle axle oriented transversely to a longitudinal direction of the vehicle. A drive shaft extends parallel with the longitudinal direction and receives drive power from an electric motor at an input section and outputs said drive power at an output section. A driven shaft extends parallel with the drive shaft and receives drive power from the output section of the drive shaft at an input section and outputs said drive power to the vehicle axle via a bevel gear arranged at a first end of the driven shaft. A brake, in particular a parking brake, includes a brake disk arranged at a second end of the driven shaft and between the input section of the drive shaft and the input section of the driven shaft with respect to the longitudinal direction.

A unit includes a housing configured to accommodate a planetary gear mechanism, wherein the housing includes a flow path through which a coolant flows, the planetary gear mechanism includes a stepped pinion gear, the stepped pinion gear includes a small pinion and a large pinion, and the flow path has a portion that overlaps the large pinion when viewed in a radial direction.