Crankshaft

Abstract

Provided is a crankshaft capable of transmitting relatively large torque in a simple structure at reasonable costs. The crankshaft comprises at least one bearing pin 2, and at least one crankshaft pin 3 offset from the bearing pin to a radial direction. The bearing pin 2 and / or the crankshaft pin 3 are connected with a hole 4 with a step arranged on a crank web 1 in the crankshaft. The bearing pin 2 has a connecting strut 5 to be fixed in the hole by means of compressed combination, and the connecting strut is arranged along an inserting direction of the bearing pin. An over-size and / or the structure of the connecting strut 5 at a radial direction of the ranges 7 and 8 of the connecting strut are adjusted with each other so as to be approximately compressed at the same degree along the full length of the connecting strut 5 against ranges 9 and 10 related to the hole 4 with a step respectively in the crankshaft. Thus, large transmittable torque can be realized in the crankshaft.

Description

technical field [0001] The invention relates to a crankshaft for a short-stroke engine, in particular configured as a large diesel engine, comprising at least one main journal and at least one connecting rod journal offset relative thereto in the radial direction; wherein the main journal and the connecting rod journal Reversely protruding from a bellcrank arm connecting them, and the main journal and / or connecting rod journal have a collar that fits into a mating stepped hole in the bellcrank arm and is secured therein by a shrink fit An embedding joint with mutually stepped parts arranged in series in the direction of insertion, which in the cold, unassembled state has a radial interference relative to the corresponding mating part of the stepped bore. Background technique [0002] Such a crankshaft is known from DK-PS 122 682 . In order to reduce the assembly weight in large engines it is always required that the crankshaft, which runs through all the cylinders, be const...

AI Technical Summary

Problems solved by technology

There is therefore the danger that the rear part of the socket with a larger diameter and therefore a larger interference will expand the mating part of the bellcrank arm after the shrink fit has been established so that the part at the front is in the socket. A clearance is created between the front part of the joint, which has a smaller diameter including a smaller interference, and the part of the bellcrank arm for which the hole fits, as shown in Figure 5, so that under load all The force flow must be transmitted through the rear part of the scarf, which is not conducive to obtaining the maximum transferable torque

Images