# US 8,783,796 B2 · Pin for use in track rollers and bogie assemblies

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- Number: US 8,783,796 B2
- Document ID: US8783796B2
- Status: Granted
- Kind: B2
- Application number: 13/163,186
- Filed: 2011-06-17
- Published: 2011-12-22
- Granted: 2014-07-22
- Earliest claimed: 2010-06-18
- Assignees: Caterpillar Inc.
- Applicants: Timothy A Thorson
- Inventors: Timothy A Thorson
- Web page: https://patentgrep.com/patent/US8783796B2

## CPC

- B62D 55/092: with lubrication means (lubricating in general F16N)
- B62D 55/15: Mounting devices, e.g. bushings, axles, bearings, sealings {(with lubrication means B62D55/092)}
- F16C 33/6677: {from radial inside, e.g. via a passage through the shaft and/or inner ring}
- F16C 2326/20: Land vehicles
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A pin for use in a track roller or bogie assembly comprises an outboard facing end, an inboard facing end having an aperture, a cylindrically-shaped external surface extending from the outboard facing end to the inboard facing end, and an inner surface extending inwardly from the aperture of the inboard facing end toward the outboard facing end and defining a cavity within the pin. The inner surface of the pin includes a groove disposed proximate the inboard facing end into which an outer surface of a resilient stopper expands to increase the pressure resistance of the pin and stopper to stopper being pushed or pulled from the pin.

## Claims

### Claim 1

A pin for use in a track roller or bogie assembly, the pin comprising:
an outboard facing end;
an inboard facing end, the inboard facing end having an aperture;
a cylindrically-shaped external surface extending from the outboard facing end to the inboard facing end; and
an inner surface extending inwardly from the aperture of the inboard facing end toward the outboard facing end and defining a cavity within the pin, the inner surface including a groove disposed proximate the inboard facing end, the groove having an inboard side surface that is approximately perpendicular to a longitudinal axis of the pin.

### Claim 2 (depends on 1)

The pin of claim 1, wherein the inner surface has a cylindrical shape having a uniform diameter, and the groove is an annular groove extending around the entire circumference of the inner surface.

### Claim 3 (depends on 1)

The pin of claim 1, wherein the groove includes a positively oriented face.

### Claim 4 (depends on 3)

The pin of claim 3, wherein the positively oriented face comprises a protrusion extending radially within the groove and having an outboard side surface facing the outboard facing end and extending perpendicular to the longitudinal axis of the pin.

### Claim 5 (depends on 3)

The pin of claim 3, wherein the positively oriented face comprises a protrusion extending radially within the groove and having an outboard side surface facing the outboard facing end and extending at an angle ranging from 90° to 45° from the longitudinal axis of the pin and sloping toward the outboard facing end.

### Claim 6 (depends on 3)

The pin of claim 3, wherein the positively oriented face comprises a protrusion extending radially inwardly within the groove and having an inboard side surface facing the inboard facing end and extending at an angle ranging from 90° to 45° from the longitudinal axis of the pin and sloping toward the inboard facing end.

### Claim 7 (depends on 1)

The pin of claim 1, comprising at least one orifice extending from the inner surface to the external surface, wherein the orifice places the cavity in fluid communication with the exterior of the pin.

### Claim 8

A cartridge pin assembly for use in a track roller or bogie assembly, the cartridge pin assembly comprising:
a pin, comprising:
an outboard facing end,
an inboard facing end, the inboard facing end having an aperture,
a cylindrically-shaped external surface extending from the outboard facing end to the inboard facing end, and
an inner surface extending inwardly from the aperture of the inboard facing end toward the outboard facing end and defining a cavity within the pin, the inner surface including a groove disposed proximate the inboard facing end, the groove having an inboard side surface that is approximately perpendicular to a longitudinal axis of the pin; and
an inboard stopper inserted into the inner surface through the aperture of the inboard facing end and engaging the inner surface to form a substantially water-tight seal at the inboard facing end of the cavity, wherein a portion of the inboard stopper is disposed within the groove.

### Claim 9 (depends on 8)

The cartridge pin assembly of claim 8, comprising:
an outboard collar having an axial aperture, wherein the end of the pin proximate the outboard facing end is inserted into the aperture of the outboard collar and connected thereto;
an inboard collar having an axial aperture, wherein the end of the pin proximate the inboard facing end is inserted into the aperture of the inboard collar and connected thereto; and
a hollow cylindrical bushing disposed about the external surface of the pin between the outboard and inboard collars.

### Claim 10 (depends on 9)

The cartridge pin assembly of claim 9, wherein the pin comprises at least one orifice extending from the inner surface to the external surface, wherein the orifice places the cavity in fluid communication with the exterior of the pin, the cartridge pin assembly comprising a lubricating fluid disposed within the cavity of the pin, with the orifice being dimensioned to allow the lubricating fluid to flow from the cavity to an outer reservoir defined by the external surface of the pin and an inner surface of the bushing.

### Claim 11

A bogie assembly comprising:
a pin, comprising:
an outboard facing end,
an inboard facing end, the inboard facing end having an aperture,
a cylindrically-shaped external surface extending from the outboard facing end to the inboard facing end, and
an inner surface extending inwardly from the aperture of the inboard facing end toward the outboard facing end and defining a cavity within the pin, the inner surface including a groove disposed proximate the inboard facing end, the groove having an inboard side surface that is approximately perpendicular to a longitudinal axis of the pin;
an inboard stopper inserted into the inner surface through the aperture of the inboard facing end and engaging the inner surface to form a substantially water-tight seal at the inboard facing end of the cavity, wherein a portion of the inboard stopper is disposed within the groove;
an outboard collar having an axial aperture, wherein the end of the pin proximate the outboard facing end is inserted into the aperture of the outboard collar and connected thereto;
an inboard collar having an axial aperture, wherein the end of the pin proximate the inboard facing end is inserted into the aperture of the inboard collar and connected thereto;
a hollow cylindrical bushing disposed about the external surface of the pin between the outboard and inboard collars;
an outboard frame wall having an aperture, wherein the outboard collar is inserted into the aperture of the outboard frame wall and connected thereto;
an inboard frame wall having an aperture, wherein the inboard collar is inserted into the aperture of the inboard frame wall and connected thereto; and
a bogie arm having an opening there through, the bogie arm being disposed about and connected to the bushing between the outboard and inboard frame walls with the bushing and the bogie arm being rotatable about the pin.

### Claim 12 (depends on 11)

The bogie assembly of claim 11, wherein the outboard facing end of the pin has an aperture and the inner surface of the pin extends to the aperture of the outboard facing end, the bogie assembly comprising:
an outboard stopper inserted into the inner surface through the aperture of the outboard facing end and engaging the inner surface to form a substantially water-tight seal at the outboard facing end of the cavity; and
a cover plate connected to the outboard frame wall and engaging the outboard stopper to retain the outboard stopper within the aperture of the outboard facing end.