Caterpillar Global Mining LLC

Caterpillar Inc.

Martin Kunigk

Elvis Tormen

A hydraulic actuator is disclosed. The hydraulic actuator may have a cylinder barrel. The hydraulic actuator may also have a piston rod reciprocally received by the cylinder barrel. The piston rod may have at least one first piston rod end extending out of the cylinder barrel. The hydraulic actuator may further have an intermediate element attached to the at least one first piston rod end by a first set of screws extending in a first direction. In addition, the hydraulic actuator may have a connecting element attached to the intermediate element by a second set of screws extending in a second direction opposite to the first direction.

Hydraulic actuator

A system for lubricating a pivot joint including a first bushing and a second bushing and a pin disposed coaxially within a cylinder clevis, the pin having a first groove and a second groove on a first side, and third grooves on a second side and a bore along a length of the pin from first side to the second side. The first groove is used for mounting a seal. The second groove and the third grooves provide transmission of a lubricant to the first bushing and the second bushing respectively. A first cover plate and a second cover plate are fastened to the cylinder clevis using a plurality of fasteners. The first cover plate includes a first port and a second port for providing the lubricant to the first bushing and the second bushing respectively. A spring is provided between the second cover plate and the pin.

System for lubrication pivot joint

A pin assembly for a piston block of a hydraulic cylinder includes a pin that is axially engaged with the piston block. The pin assembly also includes a floating bush that is spaced apart from the pin to receive a sleeve therebetween. The floating bush is also configured to exhibit axial and radial play in its movement relative to the sleeve. The axial and radial play in the movement of the floating bush allows the floating bush to align with a cap port of the cylinder housing prior to entering the cap port of the cylinder housing.

Pin assembly for a piston of a hydraulic cylinder

A tracked running gear includes a drive sprocket having two sides and laterally projecting tooth profiles on both sides; a guide wheel, at least one track roller, at least one support roller, and an endless chain formed by ground plates interconnected in an articulated manner. The ground plates have vertically extending parallel teeth which engage the tooth profiles on both sides of the drive sprocket as the ground plates are diverted around the drive sprocket. The ground plates also include a first running surface having a substantially rectilinear form between the teeth for engaging the track roller and support roller, and second running surfaces having a curved form and arranged on opposite sides of the first running surface and between the teeth for engagement with the guide wheel and the drive sprocket.

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Bochum, Germany

Martin Kunigk