Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H48/00—Differential gearings
  • F16H48/06—Differential gearings with gears having orbital motion
  • F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
  • F16H48/11—Differential gearings with gears having orbital motion with orbital spur gears having intermeshing planet gears
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H48/00—Differential gearings
  • F16H48/06—Differential gearings with gears having orbital motion
  • F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H48/00—Differential gearings
  • F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
  • F16H48/27—Arrangements for suppressing or influencing the differential action, e.g. locking devices using internally-actuatable fluid pressure, e.g. internal pump types
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H48/00—Differential gearings
  • F16H48/06—Differential gearings with gears having orbital motion
  • F16H48/10—Differential gearings with gears having orbital motion with orbital spur gears
  • F16H2048/106—Differential gearings with gears having orbital motion with orbital spur gears characterised by two sun gears

Definitions

• the present invention relates to the relative proportioning of rotary power applied to at least two rotary driven elements by a common rotary drive inlet, and more particularly but not exclusively to "limited slip" differentials for vehicles such as earth moving equipment, motor vehicles especially motor lorries and "off highway” vehicles.
• a differential assembly including a pinion, a crown gear rotatable about a fixed axis and meshingly engaged with the pinion, a carrier fixed to said crown gear so as to rotate therewith about said axis, a pair of output gears mounted within said differential so as to rotate about said fixed axis, power transfer gear means driven by said output gears, said transfer gear means being rotatably supported by said carrier, and wherein said transfer gear means co-operate to pump hydraulic fluid between a pair of chambers when relative notation between said output gears, and said differential includes duct means extending between said two chambers so that the pumping of hydraulic fluid between said two chambers inhibits relative rotation between said output gears.
• Fig. 1 is a schematic perspective view of a differential having a limited slip capability
• Fig. 2 is a schematic end elevation of three separate carriers which may be employed in the differential of Fig. l.- Fig. 3 is a schematic part section side elevation of the differential depicted in Fig. 4 sectioned along the line A-A; and
• Fig. 4 is a schematic end elevation of the differential of Fig. 3 sectioned along the line B-B.
• a differential 10 which in a conventional manner includes a pinion.12 driven by a shaft 13, which pinion 12 meshingly engages a crown wheel 14 rotatably supported in the differential housing so as to be rotatable about the axis 15.
• Extending from the differential 10 are two driven shafts 16 and 17 which are splined to output gears 18 and 19 rotatably supported within a carrier 27 (Fig. 2).
• the gear transfer assembly 20 includes a first pair of gears 21 and 22 meshingly engaged with the gears 18 and 19, and a second pair of gears 23 and 24 which are meshingly engaged the gear 23 is fixed to the gear 21, and the gear 24 fixed to the gear 22.
• the gears 21 and 23 are rotatably supported on a shaft 25, which in turn is rotatably supported in the carrier 27, while the gears 22 and 24 are rotatably supported on the shaft 26 also supported by the carrier 27.
• Figs. 3 and 4 wherein the differential assembly 10 is more fully depicted.
• the drive transfer assemblies 20 are mounted in a carrier 27 fixed to the crown wheel 14.
• the carrier 27 generally surrounds each drive transfer assembly 20 so that in co-operation with each drive transfer assembly 20 a pair of chambers 28 and 29 are provided.
• the carrier 27 reservoirs 30 located at angularly spaced locations between the drive transfer assemblies 20.
• passages 31 which each extend in a clockwise direction from a particular chamber 28 to the next adjacent clockwise reservoir 30.
• passages 32 which extend in an anticlockwise direction from a particular chamber 29 to the next adjacent reservoir 30.
• the reservoirs 30, passages 31 and 32, and the chambers 28 and 29 are filled with hydraulic fluid.
• co-operating pairs of gears 23 and 24 pump fluid between the chambers 28 and 29 (depending on the direction of rotation of the shaft 13) so that hydraulic fluid is caused to circulate between the various reservoirs 30 via the passages 31 and 32.
• the passages 31 and 32 would provide resistance to the flow of hydraulic fluid through the circuit thereby providing a resistance to the rotation of the gears 23 and 24.
• Fig. 12 wherein various configurations of the carrier 27 are depicted.
• the carrier 27 is provided with two transfer assemblies 20, in Fig. 2B, the carrier 27 is provided with four drive transfer assemblies 20, while in Fig. 2C there is provided five transfer assemblies 20.
• the differential function performed hydraulically may be tailored to the particular situation in which the differential 10 is to be employed by varying the resistance to the flow of hydraulic fluid around the carrier 27. More particularly this may be accomplished by varying the resistance to the flow of hydraulic fluid through the passages 31 and 32.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Retarders (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=3698391

Family Applications (1)

Country Status (2)

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Family Cites Families (7)

• 1985
  • 1985-10-18 WO PCT/AU1985/000253 patent/WO1986002420A1/en unknown
  • 1985-10-18 EP EP19850905195 patent/EP0198023A1/de not_active Withdrawn

Non-Patent Citations (1)

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