JPS5997319A - Shaft coupling - Google Patents

Abstract

PURPOSE:To make a shaft coupling compact, by fitting a taper sleeve on the end portions of both shafts and fitting the sleeve with an outer cylinder provided with an inside taper portion and by interposing torque-transmitting members between the end faces of the shafts. CONSTITUTION:Torque-transmitting radial pins 11 are fitted in fitting portions 10 on the ends of a driving shaft 1 and a driven shaft 2 and an outer cylinder 7 and a taper sleeve 4 are provided to carry the thrust load in the main. This results in making a shaft coupling compact. The axial displacement (separating allowance) of the coupling in separating the driving shaft 1 and the driven shaft 2 from each other can be reduced. The taper sleeve 4 and the outer cylinder 7 can easily be manufactured by vertical centrifugal casting because they are short. The surface pressure between the taper portions can be decreased by the torque transmission of the radial pins 11. For that reason, the quality of the material can be lowered to reduce the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shaft coupling mainly used for propulsion shafts for ships.

2. Description of the Related Art Conventionally, there has been a shaft coupling shown in FIG. 1 that connects both a drive shaft and a driven shaft such that they can rotate simultaneously. In the figure, a driving shaft 1 and a driven shaft 2 are arranged in series on the same axis with their shaft end surfaces 1a and lb in contact with each other, and both shafts 1.2
A tapered sleeve 4 with a tapered part 3 formed on the outer periphery is fitted onto the shaft end of the sleeve 4, and an outer cylinder 7 with a tapered part 5 formed on the inner periphery is fitted onto the tapered sleeve 4. By screwing the hydraulic nut 8 into the opening of the pressure ring 6 and pushing the tapered sleeve 4 to the right through the suppression ring 6, the outer cylinder 7 rides on the tapered sleeve 4, thereby generating a tightening force. It is known that the two shafts 1.2 are connected so as to be rotatable at the same time.

This type of shaft coupling does not use a key, so
Surface pressure between the surface of both shafts 1.2 and the inner surface of the Taber sleeve 4,
Since both thrust and torque are transmitted by the friction force caused by the surface pressure between the tapered portion 3 on the outer surface of the Taper sleeve 4 and the tapered inner surface 5 on the outer cylinder, there is a drawback that the shaft coupling becomes long. Ta. This increase in length makes it difficult to manufacture the shaft joint, and when the shafts 1 and 2 are separated from each other,
It was necessary to increase the amount of coupling movement (disassembly allowance) in the axial direction.

In addition, when using a hollow shaft as the shaft 1.2 as shown in Fig. 2, since the shaft surface pressure is large, a reinforcing sleeve 9 is installed inside the shaft.
It also had the disadvantage of having to be fitted internally.

The present invention was made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a shaft joint that is downsized by interposing a member for transmitting torque between both end surfaces of the shaft.

An embodiment of the present invention will be described below with reference to the drawings. In the following description, parts that are the same or equivalent to those in FIGS. 1 and 2 will be given the same reference numerals, and the description thereof will be omitted.

In FIG. 3, fitting portions 1O are formed in the radial direction on both end surfaces of the driving shaft 1 and the driven shaft 2, and a radial pin 11 as a member for transmitting torque is formed in the fitting portions 10.
are fitted in the radial direction with the two screws interposed at the shaft end.

According to the above configuration, since the radial pin 11 is interposed between the drive shaft l and the driven shaft 2, the radial pin ti transmits torque, so the outer cylinder 7 and the tapered sleeve 4 are mainly used for thrust The shaft coupling can be made smaller because it only requires . Since the shaft coupling can be miniaturized in this way, the amount of axial coupling movement (disassembly cost) when separating the drive shaft 1 and the driven shaft 2 can be reduced, and in addition, since it is short, the taper sleeve 4 and The outer cylinder 7 can be easily formed using vertical centrifugal casting.

Also, if you want to make the same dimensions as before, radial pin 11
Since the surface pressure between the tapers can be reduced by the amount that the taper transmits torque, it is possible to lower the material and reduce costs.On the other hand, if the material is the same, the length can be shortened, making manufacturing easier. becomes easier.

FIG. 4 shows a modification of the above embodiment, in which a male thread 15 is provided at the center of the drive shaft l, and a female thread 1 is provided at the driven shaft 2.
6 are respectively formed and the two are screwed together, and the fitting part 10 of the radial pin 11 can be formed after the two shafts 1 and 2 are connected, which facilitates processing.
This has the effect of preventing the mating surfaces from opening when torque is applied.

FIG. 6 shows another embodiment in which the outer cylinder 7 is divided into two parts, the tapered sleeve 4 is formed into a chevron-shaped taper shape, and both parts are connected by a port 20,
Since it is fastened with a NAND 21, the production of the outer cylinder 7 becomes easier.

Furthermore, according to this invention, since the axial surface pressure decreases,
When the driving shaft 1 and the driven shaft 2 are hollow shafts as shown in FIG. 4, the reinforcing rib 9 shown in FIG. 2 can be eliminated.

As described above, according to the present invention, a compact shaft joint can be provided by interposing torque transmitting members on both end surfaces of the shaft.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a conventional shaft joint, FIG. 2 is a cross-sectional view showing another conventional shaft joint, and FIG. 3 is a cross-sectional view showing a shaft joint according to an embodiment of the present invention. FIG. 4 is a cross-sectional view showing a shaft joint according to one embodiment of the invention, FIG. 5 is a cross-sectional view showing a shaft joint according to another embodiment of the invention, and FIG. 6 is a cross-sectional view showing a shaft joint according to another embodiment of the invention. It is a cross-sectional view showing a shaft joint. l... Drive shaft, 2... Driven shaft, 1a,
l l) * * e-axis end face, 3.5--teno corner. 4... Taper sleeve, 7-way/0 outer cylinder, llφ... Torque transmission member (radial pin).

Claims (1)

[Claims] (1) A drive shaft and a driven shaft are arranged in series on the same axis with their shaft ends touching each other, and a Taper sleeve with a tapered portion formed on the outer periphery is fitted onto the shaft ends of both wheels. ,
A shaft coupling in which an outer cylinder having a tapered portion formed on the inner periphery is fitted onto the tapered sleeve, and a torque transmitting member is interposed between the end surfaces of the two shafts.