JPS60237248A - Reduction and reversing machine for marine use - Google Patents

Abstract

PURPOSE:To reduce the cost of the titled machine and miniaturize the same by a method wherein a uniform speed universal coupling, attached to one end of an input shaft, is accommodated in an input shaft coupling or a flywheel. CONSTITUTION:The uniform speed universal coupling 41a is attached to the end 42, formed on the external end side of a clutch housing box 24 being projected to the front side of a casing 14 so as to have a small diameter. The input shaft couplings 44, such as a flexible coupling to be connected to the flywheel 43a of an engine 11, a damper disc or the like, are arranged in front of the small diametral end 42. A tubular boss 45, projected rearwardly, is formed integrally with the input shaft coupling 44, transmitting balls 46 are accommodated in the tubular boss 45 and, thus, the tubular boss 45 operates as the outer part of the uniform speed universal coupling 46 in combination.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a marine speed reduction/reversal gear mainly used in pleasure vessels and other small vessels.

In a conventional ship, when a speed reduction/reversing gear is attached to an engine, the output shaft is attached to the hull with an inclined state in order to drive a propeller provided outside the vessel. If you do this, the front side of the engine will rise because the input shaft and output shaft of the conventional reduction and reversing gears are arranged parallel to each other.
The problem was that the rear deck of the hull had to be raised vertically.

Therefore, by adopting an angle drive structure in which the input and output parts of the speed reducer are not parallel to each other, but the output part is arranged at an angle to the input part, the engine can be placed horizontally with respect to the bottom of the ship. The vertical space from the bottom of the ship to the deck can be reduced. Particularly in small pleasure craft and other small craft, reducing vertical space has become a very important factor in hull design.

As this type of marine reduction/reversing machine, for example,
There is one described in Publication No. 38462. As shown in FIG. 4, the device described in this publication has an output shaft (3a) disposed diagonally rearward and downward below an input shaft (2a) disposed horizontally within a clutch case (1a). This output shaft (3
A large conical gear (4a) fixed to a) is meshed with a small gear (5a) provided on an input shaft (1a). The engine power transmitted to the input shaft (2a) is then transferred to the multi-disc clutch (6).
) to the small gear (5a), and the conical large gear (4a
) is taken out from the output shaft (3a). Furthermore, as shown in Fig. 5, Japanese Patent Publication No. 59-11479 discloses that a transmission case (7) is attached to the rear wall of the clutch case (1b), and a transmission shaft (8) is mounted inside the transmission case (7). the clutch case (1b) by arranging it in an inclined manner.
The end of the output shaft (3b) protruding toward the rear transmits the engine power to the transmission shaft (8) via the constant velocity universal joint (9), and the output is taken out from the transmission shaft (8). What was done is listed. In this case, as shown in the embodiment, an input shaft (2b) is installed in the clutch case (1b).
and output shafts (3b) are arranged vertically in parallel, and a cone clutch (10) provided at the center of the output shaft (3b) is moved back and forth to be interposed between the input shaft (2b) and the output shaft (3b). The gear train is selected and the output shaft (3b) is switched to the forward or reverse direction to rotate at a reduced speed.

Problems to be Solved by the Invention The invention described in Japanese Utility Model Publication No. 54-38462 has an output shaft (
3a) is made into an angle by a large conical gear (4a), and the one in Japanese Patent Publication No. 59-11479 is made into an angle by a constant velocity universal joint (9) provided at the end of the transmission shaft (8). ing. In this way, the engine power that has been decelerated and has a large transmitted torque acts on the large conical gear (4a) and the constant velocity universal joint (9), so
'Therefore, it is necessary to use a material with high strength, which poses a problem of high cost.

In particular, in the case of the rear part of Japanese Patent Publication No. 59-11479, as described in the example, the input shaft (2b) uses a cone clutch (10) to switch the power. It has to be parallel to the output shaft (3b) on which the cone clutch (10) is provided. Therefore, in order to make it angular, another transmission shaft (8) is inevitably required, which increases the overall height, and furthermore, the total length must be increased to accommodate the transmission shaft (8). There are other problems.

Means for Solving the Problems As a means for solving the above problems, in the present invention, a constant velocity universal joint is attached to one end of the input shaft of the speed reduction/reversing machine, and this constant velocity universal joint is connected to the input shaft. It is characterized by being built into the joint or flywheel.

Embodiment FIG. 3 shows a schematic diagram of a part of a small boat using the speed reduction/reversing gear of the present invention. In the figure, (11) is an engine placed horizontally on the bottom of the ship (12), and (13)
) is a reduction/reversing gear attached to the rear of the engine (11). (14) is a propeller shaft arranged in an inclined manner, and a propeller (15) is attached to the tip thereof. (16) is the rear deck.

FIG. 1 shows a joint sectional view of a preferred embodiment of the speed reduction/reversing machine (13). In the figure, (14)
is a reduction/reversing gear case (hereinafter simply referred to as "case"), which has a plurality of bearing openings (1
6) It consists of a case main body (17) which is formed as (16) and whose rear entire surface is open, and a rear case lid (18) as a rear side wall.

(19) is a mounting flange attached to the front side wall (15) of the case body (14), and the front end (19a) is attached to the flywheel case (20) of the engine (11) installed horizontally. The rear wall (19b) also serves as the front case lid of the case (14). As shown in the figure, this mounting flange (19) is diagonally processed so that the entire case (14) is in an inclined state.

(21) is an input support shaft that is mounted on the upper half of the case body (17), the clutch housing (22) is integrally attached to the front end side, and the forward small gear is attached to the rear end side. (23) is attached in an idle state. Therefore, on the front end side of the support shaft (21), a clutch housing boss (24) corresponding to the input shaft of the present invention is
The case (14) protrudes forward from the upper bearing opening (16), and the front side wall (17) of the case body (17)
15). On the other hand, the rear end side of the support shaft (21) is pivotally supported by the rear case lid (18) via a bearing (26).

Inside the clutch housing (22) is a forward pinion (23).
) is extended into the clutch housing (22), and a multi-plate clutch plate (28) is provided between the cylindrical boss (27) and the clutch housing (22). (2
9) is a hydraulic piston housed in the clutch housing (22), and together with the multi-disc clutch plate (28) constitutes a hydraulic multi-disc clutch (30). (31) is
This is a return spring for the hydraulic piston (29).

On the other hand, (32) is an output shaft disposed parallel to the support shaft (21), the front end of which is connected to the front side wall (1).
5) It is pivotally supported via a bearing (33) inserted and supported in the bearing opening (16) on the lower side, and the rear end side is attached to the rear case lid (1
8) Projects rearward from a slightly larger diameter bearing opening (34) formed on the lower side. (35) is a large output gear integrated with the output shaft (32), and the upper forward small gear (
23) are always engaged. (36) is a bearing box that is collinearly fixed with the output shaft rear cover (37) to the rear case lid (1 day) on the outer periphery of the bearing opening (34) with the pole l-(38) (3B). be. (39a) (39b) are
A double-row tapered roller bearing is externally fitted on the rear end side of the output shaft (32), and the front bearing (39a) is inserted into the bearing opening (32).
4) and is supported by the bearing (39b) on the rear side.
) is housed inside the bearing box (36). (40) is
This is an output shaft joint fitted to the rear protruding end of the output shaft (32), and the propeller shaft (1) is connected to the propeller shaft (1) through this output shaft joint (40).
4) is connected.

(41a) is a constant velocity universal joint that is attached to the end (42) of the clutch housing boss (24) which protrudes forward of the case (14) and has a small outer end. A portion (43) is fixed to this small diameter end (42). In front of the small diameter end (42), there is an input shaft joint (such as a flexible joint or a damper disc) for connecting to the flywheel (43a) of the engine (11).
44) is located.

This input shaft joint (44) is integrally formed with a cylindrical boss (45) that protrudes rearward, and a transmission ball (46) is built into this cylindrical boss (45).
45) is configured to also serve as a part of the outer part of the constant velocity universal joint (46).

Therefore, the power from the flywheel (43a) is transmitted from the input shaft joint (44) to the constant velocity universal joint (41a) to the human power shaft (clutch housing boss (24)) to the forward small gear (23
)-output large gear (35), and at that time, the transmission path is bent at the constant velocity universal joint (42a) on the input side.

FIG. 2 is a sectional view of a main part showing another embodiment of the present invention, and in this embodiment, a constant velocity universal joint (41b)
is built into the flywheel (43b), and is especially useful when the engine (11) is small.

Effects The present invention has the above configuration, and is characterized in that a constant velocity universal joint is attached to one end of the input shaft of the speed reduction/reversing machine, and the constant velocity universal joint is built into the input shaft joint or the flywheel. By providing a constant velocity universal joint on the input side, the transmitted torque is smaller than that on the output side, which has been decelerated, so the diameter of the constant velocity universal joint can be made smaller and the entire device can be made more compact. be able to. Further, by incorporating the constant velocity universal joint into the input shaft joint or the flywheel, the overall length can be shortened. Furthermore, when mounting it on an engine, most of the parts of the current reduction/reversing gear can be used by simply modifying the input part, and there is no need for major machining of the case itself, which has the advantage of improving productivity. There is. Moreover, the special public service
Since the cone clutch is not interposed between the input shaft and the output shaft like the one described in Publication No. 479, there is no need to add a transmission shaft for angularization, and the mounting flange can be diagonally machined to easily convert the entire case. It is possible to easily change the angle by simply tilting it, reducing the vertical space and making effective use of the space.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the reduction/reversing machine of the present invention, 2nd FI! J is a sectional view of a main part showing another embodiment of the present invention, FIG. 3 is a schematic diagram showing a part of a ship equipped with the speed reduction/reversing gear of the present invention, and FIG. 4 is a sectional view showing a conventional example. , 5th
The figure is a sectional view showing another conventional example. (13) -Reduction/reversing gear, (24)...Clutch housing post (input shaft),
(41a) (41b) - constant velocity universal joint, (43a) (
43b)---Flywheel, (44)・-Human power shaft coupling. Patent Applicant: Yanmar Diesel Co., Ltd. Representative Patent Attorney Hisayuki Tarumoto Figure 5 Figure 4

Claims (1)

[Claims] A marine speed reduction/reversing machine characterized in that a constant velocity universal joint is attached to one end of an input shaft, and the constant velocity universal joint is built into the input shaft joint or the flywheel.