{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "An electromechanical dry brake caliper; a planetary roller lead screw assembly is installed within a cylinder bore of the brake caliper assembly, and a motor and a reduction gear are connected to the planetary roller lead screw assembly; the planetary roller lead screw assembly comprises a lead…",
  "path": "/patents/1385500",
  "publishedAt": "2026-06-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F16D65/18",
    "BETHEL AUTOMOTIVE SAFETY SYSTEMS CO., LTD."
  ],
  "textContent": "An electromechanical dry brake caliper; a planetary roller lead screw assembly is installed within a cylinder bore of the brake caliper assembly, and a motor and a reduction gear are connected to the planetary roller lead screw assembly; the planetary roller lead screw assembly comprises a lead screw, a nut, and rollers mounted between the lead screw and nut, the rollers are installed on a cage positioned between the lead screw and nut, with a torsion spring installed between the cage and nut; the nut has a first anti-rotation projection, and the cage has a second anti-rotation projection matching the first anti-rotation projection, elastic force of the torsion spring causes a side of the first anti-rotation projection on the nut to be in contact with a side of the second anti-rotation projection on the cage, at which time the rollers and the cage are in their initial positions.",
  "title": "electromechanical dry brake caliper"
}