| 摘要 |
347,570. Variable speed gearing. MAYBACH-MOTORENBAU GES., Friedrichshafen - on - Bodensee, Germany. Oct. 28, 1930, No. 32361. Convention date, Nov. 6, 1929. Addition to 298,186, [Class 80 (ii), Gearing, Variable-speed &c.] [Class 80 (ii).] Two-speed gearing adapted to be used as an auxiliary gear upon a vehicle without a main friction clutch comprises instead of a double-ended clutch having teeth with bevelled ends to produce a catch-up or speed equalizing effect before engagement, as in the parent Specification, two single such clutches on separate shafts. Two single clutches 6, 10 slide on driving-shaft 1 and on a divided countershaft 12, respectively. The gears 4, 8, 9, 5 adapted to yield an over-speed are all fast on their shafts and supported on both sides in the casing 3. The clutches 6, 10 are operated simultaneously by a lever 14 pivoted at 13 with a quick-throw-over toggle spring 19 and resilient actuation 15, 22, 23, 21. To change from direct-drive shown to overspeed, rod 21 is moved to the left. Since clutch 6 is gripped by torque, spring 22 is compressed. On throttling the engine, clutch 6 is released, and clutch 10 is thrown by spring 19 against the ends of the teeth of the faster moving clutch 11. Since the engine slows rapidly, equality of tooth speed is soon reached, and clutch 10 slips into engagement, the throttle being afterwards reopened. To change down to direct drive, rod 21 is moved to the right, compressing spring 23, clutch 10 being gripped by torque. On closing throttle, clutch 10 is relea ed and clutch 6 is held riding on the ends of the teeth of the faster moving clutch 7 until the throttle is reopened, when clutch 6 slips in. |
