Sleeve bearing having a flared end
A cartridge pin assembly in a track chain assembly includes a sleeve bearing having a flared end.
1 . A sleeve bearing comprising:
an at least partially annular cylindrical body defining a cylindrical axis, a radial direction, and a circumferential direction, the at least partially annular cylindrical body including:
a radially inner circumferential surface;
a radially outer circumferential surface;
a first free end and a second free end disposed along the cylindrical axis; and
a flared portion disposed proximate to the first free end along the cylindrical axis, wherein the flared portion includes:
a radially extending abutment surface,
a first transitional surface connecting the radially inner circumferential surface to the radially extending abutment surface,
an angled surface forming an external obtuse angle with the first radially outer circumferential surface,
a second transitional surface connecting the radially extending abutment surface to the angled surface, and
a third transitional surface connecting the angled surface to the first radially outer circumferential surface.
2 . The sleeve bearing of claim 1 , wherein the external obtuse angle ranges from 160.0 degrees to 179.0 degrees.
3 . The sleeve bearing of claim 1 ,
wherein the first transitional surface is a first chamfer,
wherein the second transitional surface is a second chamfer, and
wherein the third transitional surface is a radius.
4 . The sleeve bearing of claim 1 , wherein the radially outer circumferential surface defines an outer diameter of the sleeve bearing ranging from 80 mm to 200 mm.
5 . The sleeve bearing of claim 1 ,
wherein the radially outer circumferential surface defines an outer diameter of the sleeve bearing,
wherein the radially extending abutment surface defines a radial height measured radially from the first transitional surface to the second transitional surface, and
wherein a ratio of the outer diameter to the radial height ranges from 10.0 to 15.0.
6 . The sleeve bearing of claim 1 ,
wherein the radially extending abutment surface defines a radial height measured radially from the first transitional surface to the second transitional surface, and
wherein the radial height ranges from 10.0 mm to 30.0 mm.
7 . The sleeve bearing of claim 1 ,
wherein the angled surface is a conical surface.
8 . The sleeve bearing of claim 7 , wherein the conical surface defines a height measured from the second transitional surface to the third transitional surface along the radial direction ranging from 3.0 mm to 9.5 mm.
9 . The sleeve bearing of claim 7 ,
wherein the at least partially annular cylindrical body defines a longitudinal length measured from the first free end to the second free end,
wherein the conical surface defines a height measured from the second transitional surface to the third transitional surface along the radial direction, and
wherein a ratio of the longitudinal length to the height ranges from 28.0 to 36.0.
10 . The sleeve bearing of claim 7 ,
wherein the at least partially annular cylindrical body defines a longitudinal length measured from the first free end to the second free end,
wherein the conical surface defines a width measured from the second transitional surface to the third transitional surface along the cylindrical axis, and
wherein a ratio of the longitudinal length to the width ranges from 3.0 to 5.0.
11 . The sleeve bearing of claim 1 , wherein the radially inner circumferential surface defines an inner diameter of the sleeve bearing ranging from 60 mm to 180 mm.
12 . The sleeve bearing of claim 1 , wherein a width measured from the second transitional surface to the third transitional surface along the cylindrical axis ranges from 18.0 mm to 54.0 mm.
13 . The sleeve bearing of claim 1 , wherein an end portion of the flared portion is adapted to be disposed along a track pin bore longitudinal axis.
14 . The sleeve bearing of claim 13 , wherein the end portion of the flared portion is adapted to be spaced a first distance from a seal assembly at a first point and a second distance from the seal assembly at a second point.
15 . The sleeve bearing of claim 14 , wherein the first distance is different from the second distance.
16 . The sleeve bearing of claim 13 , wherein the end portion of the flared portion includes the radially extending abutment surface and the angled surface.
17 . The sleeve bearing of claim 16 , wherein the inclined surface is a ramp surface.
18 . The sleeve bearing of claim 16 , wherein first-a seal assembly is disposed radially and circumferentially outward of the angled surface.
19 . The sleeve bearing of claim 1 , wherein the sleeve bearing is made from steel.
20 . A metal sleeve bearing comprising:
an at least partially annular body defining a longitudinal axis, a radial direction, and a circumferential direction, the at least partially annular body including:
a radially inner circumferential surface;
a radially outer circumferential surface;
a first free end and a second free end along the longitudinal axis opposite the first free end; and
a flared portion proximate to the first free end, wherein the flared portion includes:
an interface region,
a first transitional surface connecting the radially inner circumferential surface to the interface region,
an angled surface forming an external angle with the radially outer circumferential surface,
a second transitional surface connecting the interface region to the angled surface, and
a third transitional surface connecting the angled surface to the radially outer circumferential surface.
21 . A sleeve bearing comprising:
an at least partially annular body including:
a radially inner circumferential surface;
a radially outer circumferential surface opposite the radially inner circumferential surface in a radial direction;
a first free end and a second free end opposite the first free end along a length of the at least partially annular body; and
a flared portion that includes:
an interface region,
a first transitional surface connecting the radially inner circumferential surface to the interface region,
an angled surface forming an external obtuse angle with the radially outer circumferential surface,
a second transitional surface connecting the interface region to the angled surface, and
a third transitional surface connecting the angled surface to the radially outer circumferential surface.