Track roller for guiding a track of a tracked vehicle and undercarriage of a tracked vehicle

Patent metadata

Field	Value
Publication number	US-12545340-B2
Application number	US-202218272894-A
Country	US
Kind code	B2
Filing date	Jan 14, 2022
Priority date	Jan 18, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

The disclosure relates to a track roller for guiding a track of a tracked vehicle including a shaft extending in an axial direction, the shaft having a central portion and two axial end portions axially adjacent to the central portion on each side, wherein a transversal through-hole is provided in each axial end portion of the shaft, a roller shell mounted on the central portion of the shaft in a rotatable manner, two annular retainer caps fitted to the shaft, and sealing arrangements located between each of the retainer caps and the roller shell, wherein the shaft is flattened at least in a region of its axial end portions in such a way that at least one support surface which includes the through-hole is provided at each end portion for mounting the track roller to an undercarriage of the tracked vehicle, and the retainer caps are arranged within the central portion of the shaft in their entirety, and an undercarriage of a tracked vehicle comprising such a track roller.

First claim

What is claimed is:

1 . A track roller for guiding a track of a tracked vehicle, comprising:
a shaft extending in an axial direction, the shaft having a central portion and two axial end portions axially adjacent to the central portion on each side, wherein a transversal through-hole is provided in each axial end portion of the shaft; a roller shell mounted on the central portion of the shaft in a rotable manner; two annular retainer caps fitted to the shaft; and sealing arrangements located between each of the retainer caps and the roller shell, wherein the shaft is flattened at least in a region of its axial end portions in such a way that at least one support surface which includes the through-hole is provided at each end portion for mounting the track roller to an undercarriage of the tracked vehicle, and the retainer caps are arranged within the central portion of the shaft in their entirety.

2 . The track roller of claim 1 , wherein the retainer caps are press-fitted to the central portion of the shaft.

3 . The track roller of claim 1 , wherein a form-locked engagement of the retainer caps and the shaft is provided by a locking element.

4 . An undercarriage of a tracked vehicle comprising:
at least one track frame providing a platform for track rollers; a plurality of track rollers affixed to the platform; and an endless track guided by the track rollers, wherein the track rollers include the track roller of claim 1 , wherein the support surface provides an abutment face for the track roller on the platform.

5 . The undercarriage of claim 4 , wherein the track rollers are affixed to the platform by two bolts extending through the through-holes in the end portions of the shaft into fixing holes provided in the platform.

6 . The undercarriage of claim 4 , wherein generally U-shaped collars are arranged circumferentially around the end portions of the shaft, the collars having a through-hole in alignment with the through-hole of the shaft.

7 . The undercarriage of claim 6 , wherein the collars have a flat axial end face configured for a sliding interaction with a flat axial end face of the retainer caps, in order to absorb axial forces acting on the retainer caps during operation of the undercarriage.

8 . The undercarriage of claim 6 , wherein the collars are fixed to the end portions at least in an axial direction by the means of a keyed connection.

9 . The undercarriage of claim 8 , wherein the keyed connection is provided by a tube inserted into the aligned through-holes in the collar and the shaft.

10 . The undercarriage of claim 6 , wherein the collars are provided with mounting holes extending along the legs of the U-shape for mounting the collars to the platform by a bolted connection.

Assignees

• Berco Spa
• Thyssenkrupp Ag

Inventors

• Grenzi Francesco
• Maggiolini Enrico

Classifications

• B62D55/10

  Bogies; Frames (track-tensioning means B62D55/30) · CPC title

• B60Y2200/25

  Track vehicles · CPC title

• B62D55/15 Primary

  Mounting devices, e.g. bushings, axles, bearings, sealings {(with lubrication means B62D55/092)} · CPC title