{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A hydraulic excavator 1 includes a traveling body 4, a slewing body 3, a working front 2 having a boom 20, an arm 21, and a bucket 22, an operation amount detector 33, a posture detector 38, a load detector 39, a drive controller 34, and a drive unit 35. The drive controller 34 calculates a target…",
  "path": "/patents/1404095",
  "publishedAt": "2025-09-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "E02F3/32",
    "HITACHI CONSTRUCTION MACH CO [JP]"
  ],
  "textContent": "A hydraulic excavator 1 includes a traveling body 4, a slewing body 3, a working front 2 having a boom 20, an arm 21, and a bucket 22, an operation amount detector 33, a posture detector 38, a load detector 39, a drive controller 34, and a drive unit 35. The drive controller 34 calculates a target operation speed of the actuator based on the operation amount, the posture of the working front, and the target surface distance so that the bucket 22 excavates along the construction target surface, and determines soil hardness of a place to be excavated based on a result detected by the load detector 39, corrects the target operation speed based on the soil hardness, and generates a motion command value. The drive controller 34 determines a target jack-up speed when the hydraulic excavator jacks up based on the target surface distance, and corrects the target operation speed based on the determined target jack-up speed.",
  "title": "HYDRAULIC EXCAVATOR"
}