Direct torque path differential having spiderless pinions
First Claim
Patent Images
1. A differential, comprising:
- an input gear;
a first side gear;
a second side gear;
a side pinion disposed between and intermeshed with the first and second side gears; and
a carrier connected to the input gear and surrounding the first side gear, the second side gear, and the side pinion, the carrier having a cup formed in an annular wall and a first orifice located in a flat bottom of the cup, the cup generally conforms to an external surface of the side pinion, and a second orifice located in an axial wall, of the carrier, at a base end of the first side gear,wherein the first orifice and the second orifice are configured to direct the flow of lubrication during different operational speeds of the differential, and all lubrication passing through the first orifice flows around the external surface of the side pinion.
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Abstract
A differential is disclosed for use with a drivetrain of a mobile machine. The differential may have an input gear, a first side gear, a second side gear, and a side pinion disposed between and intermeshed with the first and second side gears. The differential may also have a carrier connected to the input gear and surrounding the first side gear, the second side gear, and the side pinion. The carrier may have a first orifice located in an annular wall at a base end of the side pinion, and a second orifice located in an axial wall. All lubrication passing through the first orifice may flow around an external surface of the side pinion.
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Citations
20 Claims
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1. A differential, comprising:
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an input gear; a first side gear; a second side gear; a side pinion disposed between and intermeshed with the first and second side gears; and a carrier connected to the input gear and surrounding the first side gear, the second side gear, and the side pinion, the carrier having a cup formed in an annular wall and a first orifice located in a flat bottom of the cup, the cup generally conforms to an external surface of the side pinion, and a second orifice located in an axial wall, of the carrier, at a base end of the first side gear, wherein the first orifice and the second orifice are configured to direct the flow of lubrication during different operational speeds of the differential, and all lubrication passing through the first orifice flows around the external surface of the side pinion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A differential, comprising:
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an input gear; a first side gear; a second side gear; a side pinion disposed between and intermeshed with the first and second side gears; and a carrier fixedly connected to the input gear and surrounding the first side gear, the second side gear, and the side pinion, the carrier having a cup formed in an annular wall and a first orifice located in a flat bottom of the cup, the cup generally conforms to an external surface of the side pinion, and a second orifice located in an axial wall at a base end of the first side gear, wherein lubrication flows from the first orifice to the second orifice during rotation of the carrier within a first speed range, and from the second orifice to the first orifice during rotation of the carrier within a second speed range. - View Dependent Claims (16, 17, 18, 19)
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20. A drivetrain for a mobile machine having first and second traction devices located at opposing sides, the drivetrain comprising:
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a power source; a transmission driven by the power source; a main pinion operatively connected to an output of the transmission; a first half-shaft connected to the first traction device; a second half-shaft connected to the second traction device; and a differential driven by the main pinion to rotate the first and second half-shafts with substantially equal torque, the differential including; an input gear; a first side gear; a second side gear; a plurality of side pinions disposed between and intermeshed with the first and second side gears; and a carrier fixedly connected to the input gear and surrounding the first side gear, the second side gear, and the plurality of side pinions, the carrier being operatively connected to the plurality of side pinions, the carrier having a plurality of cups formed in an annular wall and a plurality of first orifices located in the annular wall and a flat bottom of the plurality of cups, the plurality of cups generally conform to an external surface of the plurality of side pinions, and a plurality of second orifices located in an axial wall at a base end of the first side gear, wherein; each of the plurality of first orifices is aligned with an axis of a corresponding one of the plurality of side pinions; at least one of the plurality of second orifices is positioned at a tooth entrant location of each of the plurality of side pinions; all lubrication passing through each of the plurality of first orifices flows around an external surface of the corresponding one of the plurality of side pinions; and the lubrication flows from the plurality of first orifices to the plurality of second orifices during a first speed range of the carrier, and from the plurality of second orifices to the plurality of first orifices during a second speed range of the carrier.
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Specification