Coupling and gear transmission device having the same

Abstract

A coupling connecting an input side rotating shaft to an output side rotating shaft and transmitting the rotational force of the input side rotating shaft to the output side rotating shaft and a gear transmission device having the coupling. In the coupling, a diaphragm formed of a flexible material is interposed between the input side rotating shaft and the output side rotating shaft so as to be deformed in the axial directions of these shafts, and the input side rotating shaft is connected to the output side rotating shaft through the diaphragm so as to be axially moved relative to each other. Thus, the durability of the coupling and the reliability of power transmission of the coupling can be increased.

Description

technical field [0001] The present invention relates to a coupling for connecting an input side rotary shaft to an output side rotary shaft in a gear transmission such as A ship speed reduction device for a ship in which a steam turbine is installed as a main propulsion engine, and relates to a gear transmission device having the coupling. Background technique [0002] The speed reduction of the steam turbine installed in the ship as the main propulsion engine is reduced from the high speed of the steam turbine to an extremely low speed of 100rmp or less with a large reduction ratio through the speed reduction device of the ship, so it is used in the speed reduction device of the ship Helical gears for smooth meshing of gears. [0003] On helical gears, a thrust Fa is applied in addition to a tangential force Ft, through which torque is transmitted. Thrust Fa is [0004] Fa=Ft·tanβ [0005] where β is the helix angle of the transmission gear. [0006] In a ship reductio...

AI Technical Summary

Problems solved by technology

[0026] When the load of the reduction gear is large, the tooth contact pressure of the external gear of the pawl 11 and the internal gear of the sleeve 12 is high, and the surface finish of the tooth profile or tooth plane of the gear is not suitable, the wear caused by long-term use The frictional force in the axial direction is excessively increased, and it may occur that the axial movement in the splined connection of the pawl 11 and the sleeve 12 becomes not smooth, and the first wheel 4 and the second pinion 5 may not be smooth. will move smoothly in the axial direction relative to each other

[0027] Therefore, with the conventional technology, the following situation may occur: the first-stage meshing portion A composed of the first pinion 3 and the first wheel 4 and the second-stage meshing composed of the second pinion 5 and the second wheel 6 cannot be smoothly performed The axial alignment of part B, and the load on the left and right teeth of the herringbone gear of the first-stage meshing part A or the second-stage meshing part B is unbalanced, resulting in partial contact of the tooth planes and cracking of the gear

[0028] Said Japanese Published Patent Application No. 2004-138608 does not provide any teaching for solving this problem

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