JPH0142689Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air clutch air supply mechanism for a planetary gear reducer for supplying compressed air necessary for operating the air clutch.

Air clutches are often used as a means for disconnecting the output shaft and driven shaft of a reducer in large-scale prime movers such as ships. Air clutches have the advantage of being able to be remotely controlled by simply operating a valve and being easy to handle; however, they are limited to structures that allow the supply of compressed air, which is the working fluid, without any problems.

The conventional air clutch air supply mechanism is as shown in Fig. 1, where 1 is a pipe for supplying compressed air;
Reference numeral 2 designates a rotor seal, 3 a reduction gear, and 4 an air clutch. A compressed air passage 5 that connects the rotor seal 2 and the air clutch 4 is a through hole drilled through a gear shaft 6 of the reduction gear. Therefore, in the conventional air clutch supply mechanism, the presence of a gear shaft passing through the reducer 3 is essential. However, in a planetary gear reducer, there is no gear shaft 6 passing through the reducer, so a conventional air clutch supply mechanism cannot be implemented, and an air clutch is not employed in a planetary gear reducer.

The present invention enables the adoption of an air clutch in a planetary gear reducer, and is arranged in a compressed air hole that passes through the planetary shaft of the planetary gear reducer and in a hole drilled in the center of the sun shaft. and a bent flow path for inverting the working fluid that has exited the through hole inside the reducer and guiding it to the connecting pipe, and having a coupling device with the air clutch at the air clutch side outlet of the connecting pipe. The present invention relates to a characteristic air clutch air supply mechanism of a planetary gear reducer.

An embodiment of the present invention will be described below based on FIG.

In FIG. 2, 4 is an air clutch, 7 is a planetary gear reducer, 8 is a bearing, and 9 is an output shaft of the planetary gear reducer.

The planetary gear reducer 7 has an integral structure with a bearing 8, and is installed on a frame or the like via the bearing 8.

First, the structure of the planetary gear reducer 7 will be briefly described.

A planetary shaft 1 is installed on the air clutch side of the casing 10.
1 are provided at required intervals in the circumferential direction, and each planetary shaft 1
1 is rotatably provided with planetary gears 12, and each planetary gear 12 is meshed with an internal gear 13.
External teeth 14 are carved on the outer periphery of the internal gear 13, and the external teeth 14 and the driven gear 15 provided on the output shaft 9
are connected by a thin cylindrical coupling ring 16. A ring-shaped sun gear 17 is disposed at the center of each planetary gear 12 and meshes with the planetary gear 12. The sun gear 17 has a sun shaft 1 connected to the air clutch 4 by a thin-walled cylindrical coupling 18.
9. In addition, the sun axis 19 is connected to the casing 1
Bearing housing 20 and planetary shaft 11 attached to 0
It is rotatably supported via bearings 22 and 23 by a plate 21 fixed to the.

Thus, by rotating the sun shaft 19, the output shaft 9 can be rotated, and the sun shaft 19 and the sun gear 17
The eccentricity between the internal gear 13 and the driven gear 15 is absorbed by the coupling rings 16 and 18. In addition, 39 is an oil supply pipe.

Next, the air clutch air supply mechanism of the planetary gear reducer of the present invention will be explained.

The compressed air path to the air clutch passes through one of the planetary shafts 11, is reversed in the reducer 7, and passes through the center of the sun shaft 19 to the air clutch 4.

That is, a compressed air hole 24 is bored in one of the planetary shafts 11, and a hole 24 for compressed air is bored in the center of the plate 21 so that the flow path bored in the radial direction coincides with the axis of the sun shaft 19. An end plate 26 having a bent passage 25 formed in continuity with the flow passage is fixed. The radial opening end of the bending passage 25 and the through hole 24 are connected by a bending pipe 27, and one end of a connecting pipe 28 is removably fitted into the axial opening end of the bending passage 25. The bent passage 25 and the bent pipe 27 form a bent flow passage in which the compressed air that is the working fluid that has exited the through hole 24 is reversed inside the reducer 7 and guided to one end of the connecting pipe 28. The other end of tube 28 is connected to air clutch 4 via a coupling device such as rotor seal 2. Here, the connecting pipe 28 is inserted into a hole 29 bored in the center of the sun axis 19.

The through hole 24 is connected to a compressed air source (not shown) via a nipple 30, and the air clutch 4
The compressed air necessary to operate is supplied from the through hole 24 through a bent pipe 27, a bent path 25, and a connecting pipe 28.

In the above air supply mechanism, the rotor seal 2 is generally more susceptible to damage than other parts, and must be easily replaceable. Therefore, it has the following configuration.

FIG. 3 is an enlarged view of the connecting pipe, in which 2 is a rotor seal, 16 is a sun shaft, and 26 is an end plate. The main body 31 of the rotor seal 2 is fixed to the air clutch 4, and is rotatable to the main body 31. The rotating part and the fixed part are sealed by pressing a seal bushing 33 against a plug 32 supported by the rotary part.

A socket portion 34 is provided on the air clutch side of the connecting pipe 28, and the socket portion 34 and the plug 3 are connected to each other.
2 are fitted together, and the space between the socket portion 34 and the plug 32 is sealed with an O-ring 35. Further, a plug portion 36 is formed at the end of the connecting pipe 28 on the end plate side, and the plug portion 36 is fitted into the end plate 26 and the plug portion 3
6 and the end plate 26 are sealed with an O-ring 35. A rotation prevention plate 37 having a plug portion 36 passed therethrough is fixed to the end face of the end plate 26, and a plug portion through hole 38 of the rotation prevention plate 37 is a long hole as shown in FIG. Part 36
The connecting pipe 28 is prevented from rotating by fitting the base of the connecting pipe 28.

As is clear from the above configuration, the end plate 2
6 and the connecting pipe 28, and the connecting pipe 28 and the rotor seal 2 are simply fitted, so they can be easily attached and detached, and the rotor seal 2 can be replaced simply by removing the air clutch 4.

As described above, according to the present invention, it is possible to connect an air clutch to a planetary gear reducer, and the planetary gear reducer can be used in fields where it has not been used before, and the reduction mechanism can be greatly simplified. Can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional air clutch supply mechanism, FIG. 2 is a sectional view of a planetary gear reducer equipped with the air clutch mechanism of the present invention, FIG. 3 is a partially enlarged view of FIG. 2, and FIG. FIG. 4 is a view taken along the line A-A in FIG. 3; 4 is an air clutch, 7 is a planetary gear reducer, 11
19 indicates a planet axis, 19 indicates a sun axis, and 28 indicates a connecting pipe.

Claims (1)

[Scope of utility model registration request] A compressed air hole that passes through the planetary shaft of the planetary gear reducer, a connecting pipe installed in the hole drilled in the center of the sun shaft, and a working fluid that exits the hole is reversed inside the reducer. a bent flow path leading to the connecting pipe;
An air clutch air supply mechanism for a planetary gear reducer, characterized in that the air clutch side outlet of the connecting pipe has a coupling device with the air clutch.