JPS6218160Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a device for extracting auxiliary power from a vibration-isolated supported marine engine to drive a working machine such as a pump or a generator.

Fig. 1 shows a conventional power transmission system for a small boat. The intermediate output shaft 3 connected to the propulsion device 2 and the input shaft 4 on the propulsion device 2 side are connected by a coupling 5 to drive the propulsion device 2, and the propulsion device 2
On the opposite side of the
A pulley 6 is attached, and a working machine (not shown) is driven from this V-pulley 6 via a V-belt 7 and the like.

By the way, in ships, in order to prevent engine vibrations from being transmitted to the ship's hull, the engine is supported with anti-vibration rubber using anti-vibration rubber.
In this case, although the vibration of the hull is reduced, the engine itself vibrates violently. Therefore, in the conventional example shown in Fig. 1 above, the auxiliary power is taken out directly from the engine 1, which is the vibrating body, so the relative vibration difference between it and the driven pulley on the working machine side is large. When the engine 1 is started or suddenly accelerated or decelerated, problems such as the transmission belt 7 flying off, the vibration-proof rubber itself being abnormally deformed, or torsional stress being generated in the shaft system of the engine 1 and the working machine have occurred. In this case, a universal joint may be used between the engine 1 and the V-pulley 6 to prevent vibrations on the engine 1 side from being transmitted to the V-pulley 6, or such a universal joint may be used. One possible method is to directly drive the work equipment, but this would result in a longer axial dimension.
The disadvantage is that it requires a large amount of hull space.

The present invention was devised in view of these conventional drawbacks, and its configuration is as shown in Figure 2.
As before, it is provided close to the propulsion device 2 side,
A joint 8 connecting the input shaft 4 of the propulsion device 2 and the intermediate output shaft 3 on the engine 1 side is connected to the output shaft 3 via an elastic joint 15 that allows the output shaft 3 to swing. A pulley 9 for taking out auxiliary power is provided, and an overhanging edge 1 is formed on the outer periphery of the split flanges 11, 11 which are divided in the diametrical direction.
1a and 11b are fitted into the protruding step portions 9a and 4a provided on the mutually opposing pulley 9 for taking out auxiliary power and the flange 10 at the end of the input shaft 4, respectively, and through the split flanges 11 and 11. It is characterized in that the input shaft 4 and the pulley 9 are connected.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 3, reference numeral 10 indicates a flange formed at the end of the input shaft 4 on the propulsion unit 2 side, and near the outer periphery of this flange 10 there is a V-pulley for taking out auxiliary power formed with a slightly larger diameter than the flange. A protruding step portion 4a is formed facing 9. Also, the flange 1
A similar protruding step portion 9a is also provided on the end face of the V pulley 9 facing 0 so as to face the protruding step portion 4a.
is formed.

As shown in FIG. 5, interposed between the flanges 10 and the V-pulley 9 are split flanges 11, 11 which are diametrically divided into two halves. The outer peripheral portion of the split flange 11 is provided with the protruding step portions 4a, 9.
The overhanging edges 11a and 11b respectively adapted to a,
It is provided so as to protrude from the side. These split flanges 11, 11 are arranged on the sides of the flange 10 and the V-pulley 9, which are arranged opposite to each other, and their main bodies are interposed between the end faces of the flange 10 and the end faces of the V-pulley 9, and both tension Chien 11a, 1
1b is fitted into the protruding step portions 4a, 9a. Then, with the split flange 11 interposed between them, the bolt 12 inserted from the flange 10 is passed through the split flange 11 and screwed into the V pulley 9. 9 is fixed to the flange 10.

In this way, the overhanging edges 11a and 11b provided on the outer peripheral portion of the split flange 11 are
Projecting step portions 4 provided on each of the 0 and V pulleys 9
a, 9a to fix the input shaft 4 and the V-pulley 9, so that the axial center of the input shaft 4 and the axial center of the V-pulley 9 are aligned with each other. If the shape of the flange 11 is determined, the axes of the V-pulley 9 and the flange 10 will always coincide even if they are repeatedly attached and detached. Therefore, there is no need to align the V-pulley 9 each time the V-pulley 9 is installed, resulting in excellent maintainability. Moreover, since the split flange 11 is divided into two parts in the diametrical direction, each split flange 11 can be inserted between the flange 10 and the V pulley 9 which are arranged to face each other, and the overhanging edge 11
Since the alignment can be performed by fitting the protruding steps 4a and 9a into the protruding step portions 4a and 9a, respectively, the installation work is not only simplified, but also
The alignment work can be done extremely easily.

On the other hand, 13 is a shaft support cylinder with a flange 14 formed at one end, and 15 is a rubber coupling as an elastic joint.
As shown in FIG. 4, the rubber ring body 16
A metal mounting boss 1 having axial bolt holes 17a, 17a formed at opposite positions in the diametrical direction.
7, 17 and also these mounting bosses 17, 17
Metal mounting bosses 18, 18, which are diametrically opposed to each other and have radial bolt holes 18a, 18a, are fixed therebetween. Further, the intermediate output shaft 3 has a cylindrical shape, and a cylindrical boss 19 is fitted and fixed to the end thereof, and this end is inserted into the rubber coupling 15. radial bolt hole 18
The rubber coupling 15 and the intermediate output shaft 3 are connected by screwing the tip of the bolt 20 inserted through the cylindrical boss portion 19 through the cylindrical boss portion 19. Further, the end of the intermediate output shaft 3 is fitted onto the shaft support tube 13 via an elastic support ring 22 so as to be able to swing freely, and the end portion of the intermediate output shaft 3 is fitted around the flange portion 14 of the shaft support tube 13 to form a rubber coupling 15. is brought into contact with the front side surface of the V pulley 9, and by screwing the bolt 21 inserted into the axial bolt hole 17a into the side surface of the V pulley 9, the rubber coupling 1
5 and V pulley 9 are connected.

In such a configuration, the rotational power of the intermediate output shaft 3 is transmitted from one metal boss 18 of the rubber coupling 15 to the V-pulley 9 via the rubber ring body 16 and the other metal boss 17. ,
Furthermore, the transmission is transmitted from this V-pulley 9 to the input shaft 4. In this case, even if the intermediate output shaft 3 swings due to the vibration of the engine 1, the transmission is caused by the deformation of the rubber ring main body 16. Therefore, this intermediate output shaft 3
Since the vibration of the engine 1 is absorbed, the vibration of the engine 1 is not transmitted to the V-pulley 6.

The present invention has the above-mentioned configuration, and as described above, in the present invention, the pulley for taking out the auxiliary power is provided at the joint close to the propulsion unit, where almost no vibrations from the engine are transmitted. The vibration of the pulley is extremely low, and the drawbacks of the conventional belt, such as the belt coming off, deterioration of the vibration isolating rubber, and the generation of torsional stress in the shaft system of the engine or working machine, are eliminated.

In addition, according to the present invention, since the pulley is simply attached to the joint in this way, the structure is extremely simple and inexpensive, and the axial dimension does not need to be long, and the auxiliary power The ejection mechanism is located on the propulsion machine side, which is the rear side of the engine.Therefore, there is usually a large deck and luggage space located on the front side of the engine, and such auxiliary Since there is no power extraction mechanism, a remarkable effect can be obtained in that work on the deck etc. can be carried out safely.

In particular, in the present invention, the input shaft and pulley are fixed by fitting the protruding edge provided on the outer circumference of the split flange into the protruding step provided on the flange and pulley, respectively. If the shape of the split flange is determined so that the axial center of the input shaft and the axial center of the pulley are aligned with each other, even if they are repeatedly installed and removed, the relationship between the two will be maintained when the pulley is installed on the flange. The axes will always coincide. Therefore, there is no need to align the pulleys when installing them.
It has excellent maintainability. Moreover, by making the split flange into a shape divided in the diametrical direction, each split flange can be inserted between the flanges and pulleys arranged opposite each other.
Since the alignment can be carried out by fitting the projecting edges into the respective projecting steps, there is an advantage that not only the installation work is simplified, but also the alignment work can be performed extremely easily. .

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional power transmission mechanism;
Fig. 2 is a front view showing the power transmission mechanism in the embodiment of the present invention, Fig. 3 is a vertical sectional view of the V-pulley mounting section, Fig. 4 is a partially longitudinal sectional front view of the rubber coupling, and Fig. 5. is a front view of the split flange. DESCRIPTION OF SYMBOLS 1... Engine, 2... Propulsion device, 3... Intermediate output shaft, 4... Input shaft, 8... Joint part, 9... V pulley, 4a, 9a... Projecting step part, 11... Split Flange, 11a, 11b... overhanging edge, 15...
...Rubber coupling spring (elastic coupling).

Claims (1)

[Scope of utility model registration request] Output shaft 3 on the engine 1 side and input shaft 4 on the propulsion device 2 side
and an auxiliary power output connected to the output shaft 3 via an elastic joint 15 that allows the output shaft 3 to swing, to a joint 8 provided close to the propulsion device 2 side. In addition to providing a pulley 9 for the
Overhanging edges 11a, 11b formed on the outer peripheral portion of 1
is fitted into the protruding step portions 9a and 4a provided on the mutually opposing pulley 9 for taking out auxiliary power and the flange 10 at the end of the input shaft 4, respectively, and the input shaft 4 is inserted through the split flanges 11 and 11. and an auxiliary power extraction device for a marine engine, characterized in that the pulley 9 is connected to the pulley 9.