Flexible coupling structure and ship thruster device with same

Abstract

A flexible coupling structure configured to exclusively support a load without transmitting the load to other portions, that is, a self-contained flexible coupling structure. The flexible coupling structure is free of a vibration problem despite the long overall length of the structure. In a gear coupling structure, a spherical radial bearing section (23) and a spherical thrust bearing section (48) are mounted to the center (O) of an arc crowning provided to an externally toothed gear (39), and a radial spherical bearing section (23) and a thrust spherical bearing section (48) are mounted such that the centers of rotation of the bearing sections (23, 48) are matched to each other. An internally toothed gear (38) is supported by the radial spherical bearing section (23) and the thrust spherical bearing section (48) to form a structure, by which the externally toothed gear (39) can tilt relative to the internally toothed gear (38) about the center (O) of the arc crowning.

Description

technical field [0001] The present invention relates to a flexible coupling structure that connects a driving shaft and a driven shaft so that rotation and power of the driving shaft can be transmitted to the driven shaft, and a ship propulsion device having such a structure. Background technique [0002] Conventionally, when the power of the driving prime mover is transmitted to the driven machine, in order to be able to tolerate the deviation of the shaft center during installation, a flexible coupling structure is usually installed therebetween for power transmission. In this way, there is no need to worry about the installation accuracy of the prime mover and the driven machine, and the installation work can be completed in a short time. [0003] On the other hand, especially in the case of ships, the base of installation (hull) will change due to deformation and other reasons. Even if there is a subtle change in the axes of the two machines, as long as the flexible coup...

AI Technical Summary

Problems solved by technology

When the outer cylinder 4 is short, the accuracy of the rotational balance is poor, that is, even the outer cylinder 4 with a large degree of unbalance rarely becomes a problem

[0010] Moreover, the longer the length, the heavier the weight, and the greater the degree of unbalance, so the unbalanced force becomes larger, and there is a problem of lateral vibration during rotation due to the unbalanced moment.

In particular, vibration problems rarely occur in machines with low speeds of several tens of revolutions per minute (rpm), but in the case of machines with medium speeds of hundreds of revolutions per minute or more and high speed machines higher than that, the effect is significant. big problem

Images