| 摘要 |
A single-cylinder motor having a crankshaft mounted or journalled in the crankcase by means of roller-bearing sets. A crank web or lobe with a crankshaft pin is arranged at one end of the crankshaft. The crankshaft pin is drivingly connected via a connecting rod with the piston of the piston-cylinder unit. The other end of the crankshaft, in the region of the end segment thereof, carries the rotor of a magneto ignition device, whereby an end journal of the crankshaft can be coupled with a power take-off or output member. To journal or mount the crankshaft, the roller-body sets are arranged axially nondetachable in a sleeve which coaxially surrounds the crankshaft, whereby the sleeve is pressed or forced into a recess of the crankcase. The sleeve, the roller body sets, and the crankshaft form a structural unit capable of being preassembled. As a result, it is possible to securely press into place both roller body sets, whereupon the thus preassembled structural unit is securely mounted in the recess of the crankcase by being pressed therein. The assembly into the crankcase is uncomplicated and saves time. The arrangement of the roller body sets according to the present invention additionally makes possible a shorter overall length of the single-cylinder motor. |
