| 摘要 |
<p>To exert torque on an engine crankshaft 3, for the purposes of tightening or loosening bolts which are coaxial with the crankshaft, torque is applied to the ring gear 5 which is mounted on the crankshaft and is normally engaged by a starter motor. A tool is provided which includes a pinion 8 which can be mounted so that it engages the ring gear and which can itself be turned by a shaped end 10 on the pinion shaft. The shaft is held in a body 6 which can be securely fixed to a suitable place on an engine block 1. To lighten or loosen the bolt, the bolt itself is held stationary and the crankshaft is turned as a result of a torque being applied to the shaft of the pinion which then applies a torque to the crankshaft itself through the ring gear. Because of the relative sizes of the pinion 8 and the ring gear 5, this torque is multiplied.</p> |
