Eccentric gears with reduced bearing span
AssigneeBorgWarner Inc.
InventorsDaniel Brown, Shawn Blackmur, Chris D. Thomas
Life of this patent
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Abstract
An electrically-controlled eccentric camshaft phaser (10) that adjusts phase between a camshaft and a crankshaft includes a sprocket (12), configured to connect to the crankshaft and rotate about a center axis (x), having a sprocket ring gear (14); a camshaft plate (20) configured to connect to the camshaft and rotate about the center axis (x), having a camshaft ring gear (22); an eccentric shaft (28) that includes a crankshaft eccentric section (52) and a camshaft eccentric section (54); a sprocket bearing (16) that is received by the crankshaft eccentric section (52); a camshaft bearing (64), having a different diameter than the sprocket bearing (16), that is received by the camshaft eccentric section (54).
Claims22
An electrically-controlled eccentric camshaft phaser (10) that adjusts phase between a camshaft and a crankshaft, the electrically-controlled eccentric camshaft phaser comprising:
- a sprocket (12), configured to connect to the crankshaft and rotate about a center axis (x), having a sprocket ring gear (14) that includes a plurality of radially-inwardly facing gear teeth (18);
- a camshaft plate (20), configured to connect to the camshaft and rotate about the center axis (x), having a camshaft ring gear (22) that includes a plurality of radially-inwardly facing gear teeth (24);
- an eccentric shaft (28) that includes a crankshaft eccentric section (52) and a camshaft eccentric section (54);
- a sprocket bearing (16) that is received by the crankshaft eccentric section (52);
- a camshaft bearing (64), having a different inner diameter than the sprocket bearing (16), that is received by the camshaft eccentric section (54), wherein at least a portion of the sprocket bearing (16) and the camshaft bearing (64) abut each other;
- and
- a compound planetary gear (26) including a sprocket planetary gear (72) engaging the sprocket ring gear (16) and a camshaft planetary gear (74) engaging the camshaft ring gear (22).
An electrically-controlled eccentric camshaft phaser (10) that adjusts phase between a camshaft and a crankshaft, the electrically-controlled eccentric camshaft phaser comprising:
- a sprocket (12), configured to connect to the crankshaft and rotate about a center axis (x), having a sprocket ring gear (14) that includes a plurality of radially-inwardly facing gear teeth (18);
- a sprocket bearing (16) that is received via an axial side (42) of the sprocket (12) and abuts the sprocket (12);
- a camshaft bearing (64), having a different inner diameter than the sprocket bearing (16), that is received via the axial side (42);
- a camshaft plate (20), including a camshaft ring gear (22) axially spaced from the sprocket ring gear (14), configured to rotationally couple with the camshaft and rotate about the center axis (x), includes a plurality of radially-inwardly facing gear teeth (24);
- an eccentric shaft (28) including a crankshaft eccentric section (52) that is engaged with an inner diameter of the sprocket bearing (16) and a camshaft eccentric section (54) that is engaged with an inner diameter of the camshaft bearing (64), wherein the eccentric shaft (28) is adapted for insertion into the camshaft phaser (10) via the axial side (42) of the sprocket (12) passing through the inner diameter of the sprocket bearing (16) and the inner diameter of the camshaft bearing (64);
- and
- a compound planetary gear (26) including a sprocket planetary gear (72) engaging the sprocket ring gear (14) and a camshaft planetary gear (74) engaging the camshaft ring gear (22).
An electrically-controlled eccentric camshaft phaser (10) that adjusts phase between a camshaft and a crankshaft, the electrically-controlled eccentric camshaft phaser comprising:
- a sprocket (12), configured to connect to the crankshaft and rotate about a center axis (x), having a sprocket ring gear (14) that includes a plurality of radially-inwardly facing gear teeth (18);
- a camshaft plate (20), configured to connect to the camshaft and rotate about the center axis (x), having a camshaft ring gear (22) that includes a plurality of radially-inwardly facing gear teeth (24);
- a sprocket bearing (16);
- a camshaft bearing (64), having a different inner diameter than the sprocket bearing (16);
- a compound planetary gear (26) including a sprocket planetary gear (72) engaging the sprocket ring gear (16) and a camshaft planetary gear (74) engaging the camshaft ring gear (22);
- and
- an eccentric shaft (28) that includes a crankshaft eccentric portion (52) engaging the sprocket bearing (16), a camshaft eccentric portion (54) engaging the camshaft bearing (64), and a bearing spacer (31).
Dependencies are inferred from the claim text.