The present invention relates to a track assembly for a tracked vehicle, which, particularly, comprises: a support shaft disposed to be orthogonal to a traveling direction of a work body; a connecting collar for connecting the support shaft to the work body while supporting both ends of the support shaft; a rotary roller fitted on the outer periphery of the support shaft and rotating while supporting the inner peripheral surface of a track; a first detection unit disposed between the support shaft and the rotary roller to measure the number of rotations of the rotary roller or the acceleration thereof; a second detection unit for measuring the temperature of a lubricant applied between the support shaft and the rotary roller; a third detection unit disposed on the rotary roller to measure a wear state of the rotary roller; and a communication unit for communicating, to the outside, a result value measured by the first detection unit or the third detection unit. Therefore, the track assembly can improve the efficiency and reliability of work.

The present application relates to the technical field of construction machinery, in particular to an excavator lower part length regulating system and an excavator. The excavator lower part length regulating system includes: a lower part walking beam; a caterpillar track, provided around the lower part walking beam; and a regulating assembly, adapted to regulating the length of the lower part walking beam and the height of the caterpillar track along a longitudinal direction. The regulating assembly has an extension state in which the lower part walking beam is driven to be elongated and the caterpillar track is driven to descend along a longitudinal direction, and a contraction state in which the lower part walking beam is driven to be shortened and the caterpillar track is driven to ascend along the longitudinal direction. The present application provides the excavator lower part length regulating system, which regulates the length of the lower part walking beam and concomitantly regulates the height of the caterpillar track along the longitudinal direction by providing the regulating assembly, to realize an adaptive regulation of the caterpillar track with a constant perimeter, overcome the defect that the traditional excavator fails to regulate the ground pressure; and provide the excavator capable of regulating the ground pressure according to requirements.

The present application relates to the technical field of construction machinery, in particular to an excavator lower part length regulating system and an excavator. The excavator lower part length regulating system includes: a lower part walking beam; a caterpillar track, provided around the lower part walking beam; and a regulating assembly, adapted to regulating the length of the lower part walking beam and the height of the caterpillar track along a longitudinal direction. The regulating assembly has an extension state in which the lower part walking beam is driven to be elongated and the caterpillar track is driven to descend along a longitudinal direction, and a contraction state in which the lower part walking beam is driven to be shortened and the caterpillar track is driven to ascend along the longitudinal direction. The present application provides the excavator lower part length regulating system, which regulates the length of the lower part walking beam and concomitantly regulates the height of the caterpillar track along the longitudinal direction by providing the regulating assembly, to realize an adaptive regulation of the caterpillar track with a constant perimeter, overcome the defect that the traditional excavator fails to regulate the ground pressure; and provide the excavator capable of regulating the ground pressure according to requirements.

The present application provides a supporting wheel shaft, a supporting wheel and a work machine. The supporting wheel shaft including an oil inlet, a first oil outlet, a second oil outlet and a lubricating oil passage; the oil inlet is provided near a middle portion of the supporting wheel shaft and used to communicate with a first oil storage chamber on a wheel body of a supporting wheel; the first oil outlet is provided close to a first end of the supporting wheel shaft and used to extend to a first floating oil seal on the supporting wheel; the second oil outlet is provided close to a second end of the supporting wheel shaft and used to extend to a second floating oil seal on the supporting wheel; the lubricating oil passage is provided inside the supporting wheel shaft and extends from the first end of the supporting wheel shaft to the second end thereof. The lubricating oil passage communicates with the oil inlet, the first oil outlet and the second oil outlet, respectively. The present application improves the lubricating environment of the floating oil seal of the supporting wheel, prevents the excessive wear of the floating oil seal and the bushing of the supporting wheel due to a decrease of the amount of lubricating oil, and ensures the service life of the supporting wheel.

The present application provides a supporting wheel shaft, a supporting wheel and a work machine. The supporting wheel shaft including an oil inlet, a first oil outlet, a second oil outlet and a lubricating oil passage; the oil inlet is provided near a middle portion of the supporting wheel shaft and used to communicate with a first oil storage chamber on a wheel body of a supporting wheel; the first oil outlet is provided close to a first end of the supporting wheel shaft and used to extend to a first floating oil seal on the supporting wheel; the second oil outlet is provided close to a second end of the supporting wheel shaft and used to extend to a second floating oil seal on the supporting wheel; the lubricating oil passage is provided inside the supporting wheel shaft and extends from the first end of the supporting wheel shaft to the second end thereof. The lubricating oil passage communicates with the oil inlet, the first oil outlet and the second oil outlet, respectively. The present application improves the lubricating environment of the floating oil seal of the supporting wheel, prevents the excessive wear of the floating oil seal and the bushing of the supporting wheel due to a decrease of the amount of lubricating oil, and ensures the service life of the supporting wheel.

A track roller for a ground-engaging track system includes a roller rim defining a roller axis and including a first seal bore formed in a first axial end and a second seal bore formed in a second axial end. A roller shaft extends through the first seal bore and the second seal bore, and may include a straight shaft having an uninterrupted cylindrical outer surface. A first seal assembly includes a first outer seal carrier interference-fitted within the first seal bore, and a second seal assembly includes a second outer seal carrier interference-fitted within the second seal bore. The first seal assembly and the second seal assembly include a first face seal and a second face seal, respectively, each including an outer seal ring and an outer seal element, and an inner seal ring and an inner seal element, where each outer seal element is radially inward of the respective outer seal ring and squeezed in radial compression to form a fluid seal with the respective outer seal carrier.

A track roller for a ground-engaging track system includes a roller rim defining a roller axis and including a first seal bore formed in a first axial end and a second seal bore formed in a second axial end. A roller shaft extends through the first seal bore and the second seal bore, and may include a straight shaft having an uninterrupted cylindrical outer surface. A first seal assembly includes a first outer seal carrier interference-fitted within the first seal bore, and a second seal assembly includes a second outer seal carrier interference-fitted within the second seal bore. The first seal assembly and the second seal assembly include a first face seal and a second face seal, respectively, each including an outer seal ring and an outer seal element, and an inner seal ring and an inner seal element, where each outer seal element is radially inward of the respective outer seal ring and squeezed in radial compression to form a fluid seal with the respective outer seal carrier.

A system for lubricating a pivot interface defined between adjacent components of a work vehicle may include a shaft and a shaft housing configured to receive an axial portion of the shaft such that the shaft housing is configured to rotate relative to the shaft. The system may also include an end cap installed relative to an end of the shaft housing and a sealing device configured to seal a radial gap defined between the shaft housing and the shaft at a seal location when a fluid pressure within the housing is below the seal's cracking pressure. Additionally, when the fluid pressure within the housing exceeds the cracking pressure, the sealing device may be configured to transition to an unsealed state to allow lubricant contained within the housing to flow axially between the sealing device and the shaft and be subsequently purged from the housing.

A system for lubricating a pivot interface defined between adjacent components of a work vehicle may include a shaft and a shaft housing configured to receive an axial portion of the shaft such that the shaft housing is configured to rotate relative to the shaft. The system may also include an end cap installed relative to an end of the shaft housing and a sealing device configured to seal a radial gap defined between the shaft housing and the shaft at a seal location when a fluid pressure within the housing is below the seal's cracking pressure. Additionally, when the fluid pressure within the housing exceeds the cracking pressure, the sealing device may be configured to transition to an unsealed state to allow lubricant contained within the housing to flow axially between the sealing device and the shaft and be subsequently purged from the housing.

A lubricating oil reservoir has an open end closed by a cap removably coupled to the open end. The cap is formed with a sensor located in the lubricating oil reservoir. The sensor is for sensing the presence of lubricating oil that fills the lubricating oil reservoir to a recommended oil level for providing machine lubrication, and the non-presence of lubricating oil that does not fill the lubricating oil reservoir to the recommended oil level, and a signal apparatus is operatively coupled to the sensor for issuing a first stimulus in response to the sensor sensing the presence of lubricating oil for identifying a normal lubricating oil level condition, and for issuing a second different stimulus in response to the sensor sensing the non-presence of lubricating oil for identifying a low oil level condition.