Formed inside a housing of a slewing unit are: an upper outer space located outside a piston in the radial direction, and at least one supply passage that guides, inward in the radial direction, a lubricant that has passed through a lower space, an outer passage, and an upper outer space in this order, to the lubricant to a plurality of brake members located below the piston. The plurality of brake members are disposed above a speed reducer and receive pressing force from the piston to brake the rotation of a rotation shaft before the rotation is decelerated by the speed reducer.

The invention relates to a drive device, in particular in the form of a pivot drive for material-transferring devices such as mining excavators, comprising an engine, a transmission that is connected to the engine and is lubricated by a transmission lubricant, and a circulation filter device for filtering the transmission lubricant in circulation, wherein the circulation filter device has at least one circulation pump for circulating the transmission lubricant. According to the invention, the circulation pump is integrated into the transmission, wherein the pump wheel of the circulation pump is configured as a peripheral wheel and is arranged for conjoint rotation with a transmission element.

The present disclosure relates generally to systems and methods for sensing wear in machines designed to reduce or break-down material. More particularly, the present disclosure relates to systems and methods for sensing wear of reducing elements used by excavation machines such as surface excavation machines. The present disclosure relates to a wear sensing system including a multi-level wear sensor protection system. The multi-level wear sensor protection system includes a first level of protection, a second level of protection, and a third level of protection.

Provided is a working machine capable of accurately detecting a contaminant in grease contained in a slewing mechanism. The working machine includes a lower travelling body, an upper slewing body, and the slewing mechanism. The slewing mechanism includes: a ring gear fixed to the lower travelling body and having inner teeth; a pinion disposed on the upper slewing body and rotated in mesh with the inner teeth of the ring gear; and a grease bath disposed along an inner circumference of the ring gear for storing grease. The upper slewing body includes a sensor for detecting a contaminant having a potential for contaminating and deteriorating the grease, and a sensor supporting member supporting the sensor at a position that allows the sensor to revolve while being immersed in the grease in the grease bath.

The present disclosure relates generally to systems and methods for sensing wear in machines designed to reduce or break-down material. More particularly, the present disclosure relates to systems and methods for sensing wear of reducing elements used by excavation machines such as surface excavation machines. The present disclosure relates to a wear sensing system including a multilevel wear sensor protection system. The multi-level wear sensor protection system includes a first level of protection, a second level of protection, and a third level of protection.

Provided is a working machine capable of accurately detecting a contaminant in grease contained in a slewing mechanism. The working machine includes a lower travelling body, an upper slewing body, and the slewing mechanism. The slewing mechanism includes: a ring gear fixed to the lower travelling body and having inner teeth; a pinion disposed on the upper slewing body and rotated in mesh with the inner teeth of the ring gear; and a grease bath disposed along an inner circumference of the ring gear for storing grease. The upper slewing body includes a sensor for detecting a contaminant having a potential for contaminating and deteriorating the grease, and a sensor supporting member supporting the sensor at a position that allows the sensor to revolve while being immersed in the grease in the grease bath.

A roller circle assembly for heavy machinery includes an upper circular rail and a lower circular rail concentrically arranged about a central axis, and tapered rollers between the upper and lower rail. Each tapered roller includes a flange having an angled and convex flange contact surface that contacts the lower rail. The lower rail and/or the upper rail can include an angled surface configured for contact with the flange contact surface. The geometry of the rollers and the lower rail are configured to reduce the stresses applied to the rollers and lower rail due to contact between the flange contact surface and the angled surface.

Formed inside a housing of a slewing unit are: an upper outer space located outside a piston in the radial direction, and at least one supply passage that guides, inward in the radial direction, a lubricant that has passed through a lower space, an outer passage, and an upper outer space in this order, to the lubricant to a plurality of brake members located below the piston. The plurality of brake members are disposed above a speed reducer and receive pressing force from the piston to brake the rotation of a rotation shaft before the rotation is decelerated by the speed reducer.