# US 2025/0155014 A1 · Axle gear housing with bi-directional lubrication channels > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0155014 A1 - Document ID: US20250155014A1 - Status: Published application - Kind: A1 - Application number: 18/949,117 - Filed: 2024-11-15 - Published: 2025-05-15 - Earliest claimed: 2023-11-15 - Assignees: ArvinMeritor Technology, LLC - Applicants: ArvinMeritor Technology, LLC - Inventors: Waseem Kaakarni; Andrew Bodary; Robert Martin - Web page: https://patentgrep.com/patent/US20250155014A1 ## CPC - F16H 48/42: characterised by features of the input shafts, e.g. mounting of drive gears thereon - F16H 57/0483: {Axle or inter-axle differentials} - B60K 1/00: Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) - F16H 57/0423: {Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes} - F16H 57/0424: {Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes} - F16H 57/045: {Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case} - F16H 57/0457: {Splash lubrication} - B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle} - F16H 2048/423: {characterised by bearing arrangement} - F16H: GEARING - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES ## Abstract An axle assembly including a differential carrier having a guide structure positioned in an upper portion of an interior face of the differential carrier. The guide structure includes a plurality of guides for directing the flow of lubricant during operation of the axle assembly. For example, the guide structure may include a plurality of guides, each guide having at least one surface on which to receive lubricant and direct flow of the received lubricant to at least one of a first feed opening and a second feed opening. ## Claims ### Claim 1 An axle assembly comprising: an axle housing defining a sump portion configured to house lubricant; a ring gear mounted within the axle housing so at least a portion of the ring gear is positioned within the sump portion to interact with the lubricant, the ring gear configured to spin in a first direction in a first configuration so that the lubricant is moved in the first direction and to spin in a second direction in a second configuration so that the lubricant is moved in the second direction, the first direction being different than the second direction; and a differential carrier coupled to the axle housing and configured to support a differential assembly, the differential carrier including an interior face facing the axle housing, the interior face of the differential carrier including a guide structure positioned on the interior face, the guide structure having: a first guide configured to receive lubricant from the sump portion when the ring gear is in the first configuration and when the ring gear is in the second configuration, the first guide including a first end positioned adjacent to a first feed opening of the differential carrier, and a second guide configured to receive lubricant from the sump portion when the ring gear is in the first configuration and when the ring gear is in the second configuration, the second guide including a first end positioned adjacent to a second feed opening. ### Claim 2 (depends on 1) The axle assembly of claim 1, wherein the guide structure is integrated with the differential carrier. ### Claim 3 (depends on 1) The axle assembly of claim 1, wherein the first feed opening is a motor feed opening and the second feed opening is a pinion feed opening. ### Claim 4 (depends on 1) The axle assembly of claim 1, wherein the guide structure includes a third guide. ### Claim 5 (depends on 4) The axle assembly of claim 4, wherein the third guide has a first end positioned adjacent the second feed opening. ### Claim 6 (depends on 5) The axle assembly of claim 5, wherein the second guide is positioned vertically above the third guide to define a gap between the second guide and the third guide. ### Claim 7 (depends on 6) The axle assembly of claim 6, wherein the first guide is positioned at least partially between the second guide and the third guide. ### Claim 8 (depends on 1) The axle assembly of claim 1, wherein the guide structure is positioned within a top section of the differential carrier, the top section defined as an area above an opening configured to receive a drive pinion. ### Claim 9 (depends on 8) The axle assembly of claim 8, wherein a third guide extends longitudinally from a top collector of the differential assembly toward the opening configured to receive the drive pinon. ### Claim 10 (depends on 1) The axle assembly of claim 1, wherein the guide structure defines a first guide leg defining two guide surfaces, a second guide leg defining two guide surfaces, and a bifurcating guide defining four guide surfaces. ### Claim 11 A differential carrier, comprising: a housing defining a central opening and an interior face surrounding the central opening; a first feed opening defined by the housing within the interior face; a second feed opening defined by the housing within the interior face; and a guide structure fixedly attached to the interior face, the guide structure including a central portion, a first guide extending from the central portion away from the central opening, a second guide extending from the central portion toward the central opening, a third guide extending laterally from the central portion in a first direction, and a fourth guide extending laterally from the central portion in a second direction. ### Claim 12 (depends on 11) The differential carrier of claim 11, wherein the first guide and the second guide are longitudinally aligned relative to the central portion. ### Claim 13 (depends on 11) The differential carrier of claim 11, wherein the third guide and the fourth guide extend from the central portion in opposite directions. ### Claim 14 (depends on 11) The differential carrier of claim 11, wherein the third guide and the fourth guide each curve toward a general direction of the central opening. ### Claim 15 (depends on 11) The differential carrier of claim 11, wherein a first end of the third guide opposite of the central portion is positioned adjacent to the first feed opening. ### Claim 16 (depends on 11) The differential carrier of claim 11, wherein a first end of the fourth guide opposite of the central portion is positioned adjacent to the second feed opening. ### Claim 17 An axle assembly comprising: an axle housing defining a sump portion configured to house lubricant; and a differential carrier coupled to the axle housing and configured to support a differential assembly, the differential carrier including an interior face facing the axle housing and a guide structure fixed to an upper portion of the interior face, the guide structure including: a first guide extending laterally from a central portion of the guide structure, the first guide including a first distal end positioned adjacent a first feed opening defined by the interior face; and a second guide extending laterally from the central portion of the guide structure, the second guide including a first distal end positioned adjacent a second feed opening defined by the interior face; a third guide extending longitudinally from the central portion of the guide structure in a first direction; and a fourth guide extending longitudinally from the central portion of the guide structure in a second direction. ### Claim 18 (depends on 17) The axle assembly of claim 17, further comprising a first guide extending laterally from a central portion of the guide structure, the first guide including a first distal end positioned adjacent a first feed opening defined by the interior face. ### Claim 19 (depends on 17) The axle assembly of claim 17, further comprising a second guide extending laterally from the central portion of the guide structure, the second guide including a first distal end positioned adjacent a second feed opening defined by the interior face. ### Claim 20 (depends on 17) The axle assembly of claim 17, further comprising: a third guide extending longitudinally from the central portion of the guide structure in a first direction; and a fourth guide extending longitudinally from the central portion of the guide structure in a second direction. ### Claim 21 (depends on 20) The axle assembly of claim 20, wherein the third guide and the fourth guide are longitudinally aligned. ### Claim 22 (depends on 20) The axle assembly of claim 20, wherein the first direction and the second direction are opposite directions. ### Claim 23 (depends on 17) The axle assembly of claim 17, wherein the guide structure extends axially from the interior face of the differential carrier so that the guide structure is configured to receive lubricant.