Mobile track working machine

Claim 2

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and poweractuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of 1. adjustment drive means for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, and 2. a control for the adjustment drive means for temporarily holding the lining rollers in a fixed relation to the frame.

Claim 3

In the mobile track working apparatus of claim 1, wherein the adjustment drive means is pressure fluid-actuated and the control comprises valve means controlling the pressure fluid actuation.

Claim 4

In the mobile track working apparatus of claim 2, wherein the pressure fluid-actuated adjustment drive means is a hydraulic drive comprising a cylinder housing a piston dividing the cylinder into two chambers, and two conduits respectively connected to the cylinder chambers, the two conduits being connected to the control valve means.

Claim 5

In the mobile track working apparatus of claim 1, further comprising a track gage indicator means associated with the adjustment drive means for presetting the lining rollers at a desired gage.

Claim 6

In the mobile track working apparatus of claim 1, wherein two of said flanged lining rollers are associated with each of the rails, the two rollers being spaced from each other in the direction of track elongation, and further comprising a crossbeam interconnecting the two rollers, the adjustment drive means being connected to the crossbeam.

Claim 7

In the mobile track working apparatus of claim 5, wherein the spacing between the two rollers is substantially the same as that between adjacent ones of the track ties.

Claim 8

In the mobile track working apparatus of claim 5, wherein the rail lifting hooks are arranged intermediate the two lining rollers associated with each rail.

Claim 9

In the mobile track working apparatus of claim 1, further comprising a machine frame mounted on two undercarriages for mobility on the track and reference systems carried on the machine frame for controlling the leveling and lining of the track, the track lining and leveling unit frame being mounted on the machine frame between the two undercarriages, and the hydraulic drive means being arranged to move the frame of the track lining and leveling unit in relation to the machine frame.

Claim 10

In the mobile track working apparatus of claim 1, wherein the lining rollers are double-flanged.

Claim 11

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and power-actuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of

Claim 12

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and power-actuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of

Claim 13

a hydraulic adjustment drive for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, the drive comprising a. a cylinder housing a piston dividing the cylinder into two chambers, and b. two conduits respectively connected to the cylinder chambers; and 2. a control for the adjustment drive for temporarily holding the lining rollers in a fixed relation to the frame, the control comprising a. a source of hydraulic fluid, b. a hydraulic fluid delivery line leading from the fluid source and a hydraulic fluid return line leading to the fluid source, and c. a valve means controlling the pressure fluid actuation, the two conduits of the adjustment drive being connected to the control valve means, and the valve means comprising an adjustable valve and check valve means, the adjustable valve being arranged for selective connection of one of the conduits to the hydraulic fluid delivery line and of the other conduit to the hydraulic fluid return line, and the check valve means being arranged to prevent hydraulic fluid flow from the cylinder chamber receiving hydraulic fluid from the delivery line.

Claim 14

a hydraulic adjustment drive for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, the drive comprising a. a cylinder housing a piston dividing the cylinder into two chambers, and b. two conduits respectively connected to the cylinder chambers; and 2. a control for the adjustment drive for temporarily holding the lining rollers in a fixed relation to the frame, the control comprising a. a source of hydraulic fluid, b. a hydraulic fluid delivery line leading from the fluid source and a hydraulic fluid return line leading to the fluid source, and c. a valve means controlling the pressure fluid actuation, the two conduits of the adjustment drive being connected to the control valve means, and the valve means comprising an adjustable valve and check valve means, the adjustable valve being arranged for selective connection of one of the conduits to the hydraulic fluid delivery line and of the other conduit to the hydraulic fluid return line, and the check valve means being arranged to prevent hydraulic fluid flow from the cylinder chamber receiving hydraulic fluid from the delivery line.

Claim 15

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and power-actuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of 1. adjustment drive means for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, 2. a control for the adjustment drive means for temporarily holding the lining rollers in a fixed relation to the frame, and 3. the lifting hooks having a stepped hook portion for selective engagement with the rail head and another, lower rail part.

Claim 16

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and power-actuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of 1. adjustment drive means for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, 2. a control for the adjustment drive means for temporarily holding the lining rollers in a fixed relation to the frame, and 3. the lifting hooks having a stepped hook portion for selective engagement with the rail head and another, lower rail part.

Claim 17

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and power-actuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of

Claim 18

In a mobile apparatus for working on a track including two rails fastened to ties, which comprises a track lining and leveling unit having a frame mounted for mobility on the track rails, hydraulic drive means for moving the frame in mutually perpendicular directions extending transversely and vertically to the track for lining and leveling the track, flanged lining rollers mounted on the frame for engagement with an associated one of the rails, and power-actuated rail lifting hooks mounted on the frame and arranged to subtend the rails, the improvement of

Claim 19

a hydraulic adjustment drive for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, the drive comprising a. a cylinder housing a piston dividing the cylinder into two chambers, and b. two conduits respectively connected to the cylinder chambers; and 2. a control for the adjustment drive for temporarily holding the lining rollers in a fixed relation to the frame, the control comprising a. a source of hydraulic fluid, b. a hydraulic fluid delivery line leading from the fluid source and a hydraulic fluid return line to the fluid source, c. pump means for delivering hydraulic fluid under pressure from the hydraulic fluid source into the delivery line, d. a branch line connecting one of the conduits to the delivery line, e. a check valve in the branch line preventing backflow of hydraulic fluid to the delivery line from the cylinder chamber connected to the branch line, f. another branch line connecting the other conduit to the return line, and g. a multi-way valve in the other branch line.

Claim 20

a hydraulic adjustment drive for continuously and simultaneously moving the lining rollers into substantially play-free engagement with the associated rails, the drive comprising a. a cylinder housing a piston dividing the cylinder into two chambers, and b. two conduits respectively connected to the cylinder chambers; and 2. a control for the adjustment drive for temporarily holding the lining rollers in a fixed relation to the frame, the control comprising a. a source of hydraulic fluid, b. a hydraulic fluid delivery line leading from the fluid source and a hydraulic fluid return line to the fluid source, c. pump means for delivering hydraulic fluid under pressure from the hydraulic fluid source into the delivery line, d. a branch line connecting one of the conduits to the delivery line, e. a check valve in the branch line preventing backflow of hydraulic fluid to the delivery line from the cylinder chamber connected to the branch line, f. another branch line connecting the other conduit to the return line, and g. a multi-way valve in the other branch line.