{
  "$type": "site.standard.document",
  "description": "A ball screw device is achieved in which the number of components can be suppressed and the assembling efficiency can be improved even in a structure that rotationally drives a screw shaft via a planetary speed-reducing mechanism. A screw shaft 2 has a screw portion 10 having a spiral-shaped…",
  "path": "/patents/1395615",
  "publishedAt": "2025-12-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/745",
    "NSK LTD [JP]"
  ],
  "textContent": "A ball screw device is achieved in which the number of components can be suppressed and the assembling efficiency can be improved even in a structure that rotationally drives a screw shaft via a planetary speed-reducing mechanism. A screw shaft 2 has a screw portion 10 having a spiral-shaped shaft-side ball screw groove 12 on an outer peripheral surface thereof, and a carrier 11 integrally formed with the screw portion 10 and constituting the planetary speed-reducing mechanism 7, and an inner ring raceway 14 constituting a rolling bearing 5 for supporting the carrier 11 so as to be able to rotate freely is directly formed on an outer peripheral surface of the carrier 11.",
  "title": "BALL SCREW DEVICE AND METHOD FOR MANUFACTURING SCREW SHAFT"
}