| 摘要 |
1532044 Motion converters EASOM ENG & MFG CORP 17 Aug 1976 [18 Aug 1975] 34167/76 Heading F2Q In an epicycloidal motion converter, a primary gear 32 driven by motor 14 via gearing 16, 36 carries at least one planet gear 46 engaging a fixed sun gear 24, the or each planet gear carrying an eccentric roller 54 received in a radial slot 66 in a drive plate 60 to transmit rotation to the plate, the drive plate carrying a crank plate 70 with a crank arm 74. The number of dwell points per revolution of the drive plate is determined by the ratio of the number of teeth on the sun gear to the number of teeth on the planet gear(s), and the length of the or each dwell period and the maximum velocity are determined by the eccentricity of the roller(s) 54. The motor may be controlled by switches 79 actuated by dogs 75, 77 rotatable with gear 32. In Fig. 2, the crank arm 74 is coupled via link 105 to a rack 76 engaging pinions 88 which act to raise and lower locating pins 84 as the crank arm is rotated through 360 degrees. The gears 24, 46 have a 1 : 1 ratio in this case so that the pins 84 dwell prior to entry into holes in a workpiece 87. In Fig. 6, the crank arm 104 is coupled by link 102 to an arm 101 which is fast with an arm 96 and rotates the latter to cause it to raise and lower transfer bar 94 as the crank arm is rotated through 180 degrees from position A and then back to that position. |
