{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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    "mimeType": "image/png",
    "size": 105680
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  "description": "The present application provides a multi-stage transmission structure including: a pedal shaft, a multi-stage gear group, and a first unidirectional device and a second unidirectional device that are coaxially arranged; a plastic shaft sleeve is sleeved between the two gears coaxially arranged on a…",
  "path": "/patents/1423277",
  "publishedAt": "2026-06-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F16H1/20",
    "ZW DRIVE GMBH"
  ],
  "textContent": "The present application provides a multi-stage transmission structure including: a pedal shaft, a multi-stage gear group, and a first unidirectional device and a second unidirectional device that are coaxially arranged; a plastic shaft sleeve is sleeved between the two gears coaxially arranged on a part of the gear groups in the multi-stage gear group, and the gear shaft of the output gear group in the multi-stage gear group is sleeved on an outer side of the pedal shaft; the second unidirectional device is connected to the gear shaft of the output gear group and the pedal shaft, and the first unidirectional device is arranged between the gear shaft of the output gear group and the gear; the shafts mounted in the first unidirectional device and the second unidirectional device are allowed to rotate in opposite directions, and the first unidirectional device is an unidirectional wedge bearing.",
  "title": "MULTI-STAGE TRANSMISSION STRUCTURE, POWER DEVICE AND ELECTRIC BICYCLE"
}