Bicycle crank arm coupling assistance device

{
  "publication_number": "US2022315162A1",
  "country": "US",
  "kind": "A1",
  "title": "Bicycle crank arm coupling assistance device",
  "abstract": "The present invention relates to a coupling-assist device for a bicycle crank arm, comprising: a main body open through upper and lower portions, the main body having a space formed to receive a crank arm to be inserted; a handle member extending from a lower portion of the main body; a support frame including a fixing part formed on a lower portion thereof and coupled with the upper portion of the main body, and a position adjusting hole that is open through to allow a tool to be passed therethrough and connected to the crank arm, wherein the position adjusting hole enables adjustment of position of the tool in up and down directions; and a support means.",
  "claims": [
    "1. A coupling-assist device for a bicycle crank arm comprising: a main body open through upper and lower portions, the main body having a space formed to receive a crank arm to be inserted; a handle member extending from a lower portion of the main body; a support frame including a fixing part formed on a lower portion thereof and coupled with the upper portion of the main body, and a position adjusting hole that is open through to allow a tool to be passed therethrough and connected to the crank arm, wherein the position adjusting hole enables adjustment of position of the tool in up and down directions; and a support means including a lower support means passed through the main body and fastened to a lower coupling hole of the crank arm, and an upper support means coupled with the position adjustment hole to adjust the positions of the tool. 2. The coupling-assist device according to claim 1, wherein the main body further includes: a sealing jaw portion to which the fixing part is coupled; a front fastening hole through which the lower support means is passed through; and a rear fastening hole into which an end of the lower support means is inserted and fixed. 3. The coupling-assist device according to claim 2, wherein the lower support means includes: a fastening head to be coupled with a fastening tool; a screw portion extending from a front end of the fastening head and fastened to a coupling hole of a crank arm while being passed through the front fastening hole; a fixing protrusion protruding from a front end of the screw portion and inserted into and fixed to the rear fastening hole; and a coupling protrusion formed between the fastening head and the screw portion, and fitted into the front fastening hole. 4. The coupling-assist device according to claim 1, wherein the upper support means includes: a flange head formed at one front end and having a diameter greater than a diameter of the position adjustment hole, for close contact with a front surface of the support frame; a nut fastening part formed on other front end and having a thread formed along an outer circumferential surface; and a fixing nut fastened to the nut fastening part. 5. The coupling-assist device according to claim 1, wherein the main body is divided into first and second main bodies, which are coupled to open and close with each other. 6. The coupling-assist device according to claim 1, wherein the handle member and the support frame are configured to be placed into the main body."
  ],
  "description_excerpt": "The present invention relates to a coupling-assist device for a bicycle crank arm, and more particularly, to a coupling-assist device for a bicycle crank arm, capable of supporting a crankshaft and a crank arm such that coupling and separation thereof can be easily achieved even with a small force, and also preventing abrasion of a coupling portion between the crankshaft and the crank arm from excessive force.\n\nIn general, bicycles have been mainly used as a means of delivery, transportation, and so on, but recently, the use of bicycles for leisure activities such as mountain driving, cycling competitions, long-distance bicycle trips, and the like is also increasing. The related bicycle as described above is equipped with a driving device for driving the rear wheel, with the driving device typically formed on the pedal side of the bicycle such that, when force is applied to the pedal, the force is transmitted through the crank arm connected to the pedal to rotate the chain to rotate the rear wheel. That is, the operation principle of this configuration is that by pushing a pedal coupled with the crank arm with foot allows the crankshaft coupled with the crank arm to be rotated, which in turn causes the rear wheel connected to the crankshaft through the chain to be rotated interlockingly. At this time, the related crankshaft is simply assembled in the form of being coupled with the coupling hole of the frame, and is formed in a cylindrical shape, so that the crank arm is coupled with both ends of the crankshaft.",
  "cpc": [
    "B62M 3/00",
    "B62K 2015/003",
    "F16B 5/02"
  ],
  "ipc": [
    "B62M 3/00",
    "F16B 5/02"
  ],
  "assignees": [
    "KIM TAE YANG"
  ],
  "inventors": [
    "KIM TAE YANG"
  ],
  "filing_date": "2020-06-10",
  "publication_date": "2022-10-06",
  "priority_date": "2019-07-24",
  "application_number": "US-202017628907-A",
  "family_id": "74088389",
  "citations": [
    "US5161430A",
    "US5421180A"
  ]
}