Free-wheel mechanism |
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| 申请号 | US3623582D | 申请日 | 1970-01-12 | 公开(公告)号 | US3623582A | 公开(公告)日 | 1971-11-30 |
| 申请人 | EBAUCHESFABRIK ETA AG; | 发明人 | GIGER URS; JAKOB-SCHILD EDWIN FERNAND; | ||||
| 摘要 | A freewheel mechanism with a pair of coaxial wheels and yielding wedging members cooperating with indentations of the wheels and interlocking the latter for rotary motion when the driving wheel moves in one direction, while allowing the driving wheel to rotate alone freely in the reverse direction. The wedging members are themselves rigid and form part of a single punched piece inserted between the wheels on their common arbor and comprising a hub portion and resilient radial arms, each of which connects a wedging member to the hub portion. Each radial arm has built-in torque and is merely subjected to a pull when the wedging member carried thereby transmits a torque from the driving wheel to the driven wheel. | ||||||
| 权利要求 | 1. A freewheel mechanism comprising, in combination, an arbor, a hub portion loosely set on said arbor, a pair of coaxial wheels on said arbor, located on either side of said hub portion, the facing side surfaces of said wheels having opposite working portions in the form of circular crowns, a row of locking means provided on each one of said wheels within said working portion thereof, an elongated rigid wedging member yieldingly arranged between said wheels and being oriented so as to extend over its whole length opposite the rows of locking means provided on said wheels, and a radial resilient arm having built-in torque and carrying said wedging member, said arm extending from said hub portion to a point of said wedging member being equidistant from the two ends thereof, said wedging member cooperating with said locking means under the action of the torque of said radial arm so as to interlock said wheels when one of them rotates in a predetermined direction and to slide over said locking means when said one wheel rotates in the reverse direction. 2. The freewheel mechanism as claimed in claim 1, wherein said locking means consist of cutouts provided in each one of said wheels and regularly staggered around the axis thereof, said cutouts being circular and said wedging member being arcuate, its two ends being rounded and having a radius of curvature at most equal to the radius of said cutouts. 3. The freewheel mechanism as claimed in claim 1, wherein said locking means consist of cutouts provided in each one of said wheels and regularly staggered around the axis thereof and further comprising a plurality of similar wedging members, the two wheels having different numbers of cutouts, at most one of these numbers being divisible by the number of wedging members. 4. The freewheel mechanism as claimed in claim 1, wherein said locking means consist of cutouts provided in each one of said wheels and regularly staggered around the axis thereof and wherein said wedging member, said radial resilient arm carrying the wedging member and said hub portion from which said radial arm projects form parts of a single Punched piece, the two end portions of said wedging member being bent in opposed direction out of the plane of said punched piece so as to extend on either side of said plane. |
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