{
  "$type": "site.standard.document",
  "description": "A drive system for a vehicle utilizes a series of drive motors (72,74) and a single planetary gear box (12,112) to provide driving input to a differential (10,100) for an axle assembly. The differential (10,100) drives a pair of axle shafts (16) that drive a pair of laterally spaced wheels. The…",
  "path": "/patents/1076898",
  "publishedAt": "2005-06-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K1/02",
    "ARVINMERITOR TECHNOLOGY LLC [US]"
  ],
  "textContent": "A drive system for a vehicle utilizes a series of drive motors (72,74) and a single planetary gear box (12,112) to provide driving input to a differential (10,100) for an axle assembly. The differential (10,100) drives a pair of axle shafts (16) that drive a pair of laterally spaced wheels. The planetary gear box (12,112) includes a sun gear (46), a plurality of planet gears (48) in meshing engagement with the sun gear (46), a planet carrier (62) that supports the planet gears (48), and a ring gear (52) that is in meshing engagement with the planet gears (48). One drive motor (72) drives the sun gear (46) and another drive motor (74) drives the ring gear (52). The planet carrier (62) provides the output driving force from the planetary gear box (12,112) to the differential (10,100). The motor (72) that drives the sun gear (46) provides for high output torque by taking advantage of a high gear ratio reduction and the motor (74) that drives the ring gear (52) provides for high output speed by taking advantage of a low gear ratio reduction. When both motors (72,74) are simultaneously powered, a variable gear ratio is provided.",
  "title": "Variable ratio drive system"
}