JPS6017557Y2 - Forward/reverse two-speed marine reduction/reversing gear - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a two-stage forward/reverse transmission in a marine reduction/reversing gear.

[Conventional technology]

Conventionally, small and medium-sized fishing boats have used reduction gears in their engines in order to simplify the engine structure without reversing the engine. Adopts the structure of type reduction/reversing machine.

As is well known, such a vertically eccentric type reduction/reversing machine has an input shaft installed in the upper part of the reversing machine case, a thrust shaft installed in the lower part parallel to each other, and a normal rotation clutch, pinion, etc. installed on the input shaft. It has a structure in which a large thrust gear that meshes with the pinion is installed on the thrust shaft, and since it uses a high-speed engine, the diameter of the large thrust gear is adjusted to improve propeller efficiency by adjusting the reduction ratio. It is extremely large.

Therefore, the large thrust gear forms a dead space.

Therefore, one of the present inventors provided an internal gear of a planetary gear mechanism inside the rib portion of the large thrust gear to increase the reduction ratio of the vertical eccentric reduction/reversal gear, and We have made a proposal to effectively utilize the dead space formed by
(See Publication No. 068).

On the other hand, if a vertically eccentric type reduction/reversing gear is to have a forward/reverse two-speed transmission function, a dedicated friction-type double clutch mechanism is required, resulting in an increase in size and weight. This makes it unsuitable for use on bulky vessels, and since the friction type clutch is always engaged, it rotates even when the two sets are not in use, resulting in a large horsepower loss due to friction.

[Means for solving problems]

Therefore, the present invention improves the vertically eccentric marine speed reducer/reverser having the planetary gear mechanism to provide a two-stage forward/reverse transmission function while making it lightweight and compact, making it ideal for marine speed reducers/reversers. The aim is to provide equipment.

To explain this with reference to an embodiment, as shown in FIG. 1, an input gear 20 and an input shaft 12 are constantly rotating from an engine flywheel E via a joint 11.

A clutch case 19 extends from the input gear 20, and a multi-disc friction clutch 13 is housed within the clutch case 19.

This multi-disc friction clutch 13 has a spline portion extending from a pinion 14, and the pinion can freely stop rotating due to the action of the clutch.

The pinion 14 meshes with a large thrust gear 15 of a thrust shaft 16, and a solar type planetary gear mechanism (referring to a planetary mechanism for fixing the sun gear 1) is provided on the side of the large thrust gear 15.

An internal gear 6 is fixed inside the rib portion of the large thrust gear 15 , and a planetary gear 7 that meshes with the internal gear 6 is rotatably supported by a planetary shaft 9 . 8, and the shaft 9 revolves together with the thrust shaft 16.

The planetary gear 7 meshes with the sun gear 1 which is loosely fitted onto the thrust shaft 16 so as to be freely slidable in the axial direction.

Therefore, as shown in FIG. The large thrust gear 15 and the thrust shaft 16 rotate integrally by meshing with a flange internal gear 17 formed on the inner diameter of the flange 8 to eliminate so-called planetary motion.

In the dual operation, as shown in FIG. meshes with the case internal gear 3 carved in the
As a result, the sun gear 1 is fixed, and the planetary gear 7 rotates around the sun gear 1 at a reduction ratio of 1:1.4.
The planetary shaft 9 rotates the flange 8 and rotates the thrust shaft 16 at a reduced speed with respect to the large thrust gear 15 .

In addition, if the above rotation is considered to be backward movement, forward movement is caused by input gear 20.
Two forward input gears (not shown) that mesh with the forward input gears are provided, and a forward clutch (not shown) and a pinion (not shown) are attached to the forward shaft (not shown) that supports each forward input gear.
By meshing the pinion with the large thrust gear 15, the thrust shaft 16 is rotated forward through the series and double series operations as described above.

Since the present invention adopts the structure described above, particularly the structure described in the claims for utility model registration, it has achieved the following effects.

[Effect of idea]

The dead space formed by the large thrust gear in the vertically eccentric type reduction/reversing gear is effectively utilized with a planetary gear mechanism to create a lightweight and compact structure with a large reduction ratio. When the chain is not used, that is, when the chain is in use, it does not consist of a friction clutch, so there is no horsepower loss.

In particular, since the sun gear is capable of reciprocating movement between the flange internal gear and the case internal gear within the dead space, it is possible to change speeds without requiring extra space, making it suitable for marine reduction/reversing gears. can do.

[Brief explanation of drawings]

FIG. 1 is an overall cross-sectional view of an embodiment of the present invention, FIG. 2 is a view of the main parts in a series, and FIG. 3 is a view of the main parts in a double series. 1... Sun gear, 6... Internal gear, 12... Input shaft, 13... Multi-plate friction clutch, 14... Zenion, 15...
... Thrust large gear, 16... Thrust shaft, 20...
...Input gear.

Claims (1)

[Scope of utility model registration request] The input shaft that transmits the power from the engine is equipped with an input gear, a forward rotation clutch, and a pinion, and a reverse rotation input gear that meshes with the input gear is installed. A clutch and a pinion are provided, and a large thrust gear is provided on a thrust shaft provided below and parallel to these input shafts and a reverse rotation shaft, and each of the pinions meshes with the large thrust gear, and the large thrust gear In a vertically eccentric marine speed reduction/reversing machine having a planetary gear mechanism, in which the internal gear of the planetary gear mechanism is fixed to the inside of the rib part of the flange fixed to the thrust shaft, the planetary gear of the planetary gear mechanism can be rotated on the flange fixed to the thrust shaft. a flange internal gear is engraved on the flange, a case internal gear is engraved inside the reversing i case facing the flange internal gear, and a sun gear of the planetary gear mechanism is provided on the thrust shaft. A vertically eccentric marine speed reduction/reversing machine characterized in that the flange internal gear and the case internal gear are engaged and disengaged by loosely fitting the sun gear and reciprocating the sun gear in the axial direction.