{
  "$type": "site.standard.document",
  "description": "An electric linear motion actuator is provided which includes an outer ring member (21), a rotary shaft (34), planetary rollers (49), and a carrier (40) including a disk (41a), and in which the outer ring member (21) is formed on its inner diameter surface with a helical rib (51), and each of the…",
  "path": "/patents/920688",
  "publishedAt": "2017-09-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/741",
    "NTN TOYO BEARING CO LTD [JP]"
  ],
  "textContent": "An electric linear motion actuator is provided which includes an outer ring member (21), a rotary shaft (34), planetary rollers (49), and a carrier (40) including a disk (41a), and in which the outer ring member (21) is formed on its inner diameter surface with a helical rib (51), and each of the planetary rollers (49) is formed in its outer diameter surface with circumferential grooves (52) in which the helical rib (51) is engaged. When the rotary shaft (34) rotates, due to the frictional contact of the planetary rollers (49) with the rotary shaft (34), the planetary rollers (49) rotate about their axes while revolving around the rotary shaft (34) so that the outer ring member (21) axially linearly moves. The electric linear motion actuator further includes thrust roller and retainer assemblies (53) each mounted between one of the planetary roller (49) and the surface of the disk (41a) of the carrier (40) that is opposed to the one of the planetary rollers, and each guided by a raceway (49a), i.e., an end surface of the corresponding planetary roller (49). The electric linear motion actuator further includes a common raceway disk (57) common to all of the thrust roller and retainer assemblies (53), the common raceway disk being mounted between the thrust roller and retainer assemblies (53) and the surface of the disk of the carrier that is opposed to the thrust roller and retainer assemblies. Therefore, the number of components constituting such a thrust roller bearing can be reduced, and the carrier (40) can be easily assembled.",
  "title": "ELECTRIC LINEAR ACTUATOR AND ELECTRIC BRAKE DEVICE"
}