The present disclosure generally relates to a railroad track ballast tamping vehicle and associated methods of use, wherein the vehicle comprises: a rigid frame; a variable-displacement servo-pump operatively coupled to the vehicle; at least one linear hydraulic actuator operatively coupled to the frame at a proximal end of the at least one linear hydraulic actuator and comprising: at least one internal cavity for receiving hydraulic fluid from the variable-displacement servo-pump via a hydraulic hose; and an actuator rod passing through a first internal cavity and a second internal cavity of the at least one linear hydraulic actuator; and a tamping tool operatively coupled to a distal end of the at least one linear hydraulic actuator. A tamping pad associated with the tamping tool may be lowered into ballast underlying railroad tracks and between railroad track ties for performing ballast tamping operations.

The invention relates to a machine for stabilising a track with a ballast bed, comprising a machine frame supported on rail-based running gears and a stabilising unit which can be rolled on rails of the track by means of work unit rollers, and which comprises a vibration exciter for generating a dynamic impact force as well as a loading device for generating a load acting on the track. Therein, the loading device is coupled with a control device for periodically changing the load during a stabilising process. The periodic change of the load alternately influences the near and far range of the load application. This leads to improved compaction effectiveness compared to a constant load.

The invention relates to a machine for stabilising a track with a ballast bed, comprising a machine frame supported on rail-based running gears and a stabilising unit which can be rolled on rails of the track by means of work unit rollers, and which comprises a vibration exciter for generating a dynamic impact force as well as a loading device for generating a load acting on the track. Therein, the loading device is coupled with a control device for periodically changing the load during a stabilising process. The periodic change of the load alternately influences the near and far range of the load application. This leads to improved compaction effectiveness compared to a constant load.

The invention relates to a machine for stabilising a track, having a machine frame supported on rail-based running gears and at least one height-adjustable stabilising unit which can be rolled on rails of the track by means of work unit rollers, comprising a vibration exciter with rotating unbalanced masses for generating an impact force acting dynamically in a track plane normal to a longitudinal direction of the track as well as a linear drive for generating a load acting on the track. It is provided that a main unbalanced mass and a secondary unbalanced mass produce different centrifugal forces at the same rotational speed depending on the direction of rotation, the two unbalanced masses being coupled in such a way that, during rotation in one direction of rotation, the unbalanced masses have a first phase shift in relation to one another and that, during rotation in the opposite direction of rotation, the unbalanced masses have a second phase shift relative to one another which differs from the first phase shift. Depending on the arrangement of the unbalanced masses, a changed phase shift changes both the direction and the strength of the impact force.

The invention relates to a machine for stabilising a track, having a machine frame supported on rail-based running gears and at least one height-adjustable stabilising unit which can be rolled on rails of the track by means of work unit rollers, comprising a vibration exciter with rotating unbalanced masses for generating an impact force acting dynamically in a track plane normal to a longitudinal direction of the track as well as a linear drive for generating a load acting on the track. It is provided that a main unbalanced mass and a secondary unbalanced mass produce different centrifugal forces at the same rotational speed depending on the direction of rotation, the two unbalanced masses being coupled in such a way that, during rotation in one direction of rotation, the unbalanced masses have a first phase shift in relation to one another and that, during rotation in the opposite direction of rotation, the unbalanced masses have a second phase shift relative to one another which differs from the first phase shift. Depending on the arrangement of the unbalanced masses, a changed phase shift changes both the direction and the strength of the impact force.

The present disclosure generally relates to an improved railroad track ballast tamping tool. The tamping tool may be lowered into ballast underlying railroad tracks and between railroad track ties for performing ballast tamping operations. The tamping tool includes a shank and a paddle coupled to the shank. The paddle comprises a top ridge disposed on a top surface of the paddle and a bottom ridge disposed on a bottom surface of the paddle. The tamping tool additionally includes a top surface wear tile coupled to the top surface of the paddle and abutting a rear face of the top ridge, a bottom surface wear tile coupled to the bottom surface of the paddle and abutting a rear face of the bottom ridge, and a nose wear tile coupled to the top and bottom surfaces of the paddle and abutting a front face of both the top and bottom ridges.

The present disclosure generally relates to an improved railroad track ballast tamping tool. The tamping tool may be lowered into ballast underlying railroad tracks and between railroad track ties for performing ballast tamping operations. The tamping tool includes a shank and a paddle coupled to the shank. The paddle comprises a top ridge disposed on a top surface of the paddle and a bottom ridge disposed on a bottom surface of the paddle. The tamping tool additionally includes a top surface wear tile coupled to the top surface of the paddle and abutting a rear face of the top ridge, a bottom surface wear tile coupled to the bottom surface of the paddle and abutting a rear face of the bottom ridge, and a nose wear tile coupled to the top and bottom surfaces of the paddle and abutting a front face of both the top and bottom ridges.

A method for compacting a ballast bed, on which railroad ties and track rails secured thereto are supported, uses a work assembly which is arranged on a track construction machine that can be moved on the track. During a compaction process, a signal is detected and a characteristic variable is derived therefrom by an analysis device in order to evaluate the quality of the ballast bed. The work assembly contains an electric drive, by which the compaction process is at least partly carried out. At least one operating variable of the electric drive is supplied to the analysis device, and a ballast bed characteristic variable is derived from the operating variable by the analysis device.

A method for compacting a ballast bed, on which railroad ties and track rails secured thereto are supported, uses a work assembly which is arranged on a track construction machine that can be moved on the track. During a compaction process, a signal is detected and a characteristic variable is derived therefrom by an analysis device in order to evaluate the quality of the ballast bed. The work assembly contains an electric drive, by which the compaction process is at least partly carried out. At least one operating variable of the electric drive is supplied to the analysis device, and a ballast bed characteristic variable is derived from the operating variable by the analysis device.

A method for stabilizing a track having sleepers supported on a track ballast and rails secured to the sleepers, includes using a stabilizing unit which is connected to a machine frame that can be moved on the rails and has a vibration exciter and rollers that can roll on the rails. The vibration exciter generates in particular horizontal vibrations which run transversely to the track longitudinal direction. The course of a force exerted onto the track by the stabilizing unit is recorded over a vibration path during a vibration cycle by sensors. At least one parameter is derived from the course by an evaluation device and is used to evaluate the stabilizing procedure and/or the quality of the track ballast. A device for implementing the method is also provided.