JPS62185000A - Power transmission for small ship - Google Patents

Abstract

PURPOSE:To facilitate the installing and removing operation of a belt and lighten a burden to the bearing part of a crankshaft at the time of transmitting power to auxiliary machinery by installing a pulley on which a belt for transmitting power to said auxiliary machinery is put around, on the projected end of a power transmission shaft. CONSTITUTION:A power transmission 4 has a casing 10, and an input shaft 11 is removably supported on its upper part while being interlockedly connected to an output shaft 12 via a reverse rotation reduction gear 13. A first and a second engine 23, 24 which are auxiliary machinery are provided on both side parts of the power transmission 4, while a power take-off shaft 25 which transmits power transmitted from the input shaft 11 to the first engine 23, is removably supported by the casing 10. The rear end part of a reverse rotation shaft 19 which is projected out of the rear end part of the casing 10 as a free end, is connected to the second engine 24 via a second belt winding means 28. Therefore, the outer part of the projected ends of power transmission shafts is opened, to facilitate the installing and removing operation of a belt to and from a pulley.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power transmission device for a small boat, and more particularly to one capable of transmitting power to an auxiliary machine such as a generator.

(Prior Art) Some power transmission devices for small ships are designed to transmit power from an engine to a propeller shaft for propulsion of the ship, and also to an auxiliary machine such as a generator. The first concrete example of this structure is to use a pulley that is coaxial with the engine crankshaft and the input shaft of the power transmission device, and wraps the belt for power transmission to the auxiliary equipment on the same axis. Alternatively, a pulley may be attached to the connecting portion between the output shaft and the propeller shaft of the power transmission device as described above.

In a second specific example, the end of the crankshaft opposite to that connected to the input shaft projects outside from the crankcase, and a pulley is attached to this projecting end.

(Problem to be Solved by the Invention) In the case of the first specific example above, each time the belt is attached to or detached from the pulley, the corresponding two shafts are uncoupled and the belt is removed from the pulley. It is necessary to separate them and pass the heald through the gap created by this. However, the work of disconnecting the two shafts is extremely complicated, and the work of attaching and detaching the belt is not easy.

Furthermore, in the case of the second specific example, since the pulley is attached to the free end of the crankshaft, the above-mentioned complicated operations are not necessary and the belt can be easily attached and detached. However, this configuration has the disadvantage that belt tension is added to the crankshaft bearing, which normally receives a large load due to the impact force caused by the engine's explosive force. There is also the disadvantage that vibration caused by this is transmitted to the auxiliary equipment.

(Purpose of the Invention) This invention was made in consideration of the above-mentioned circumstances, and it is possible to easily attach and detach a belt to a pulley for transmitting power to an auxiliary machine, and also to transmit power to an auxiliary machine. The purpose is to prevent excessive damage to the bearing of the crankshaft during transmission, and to prevent engine vibration from being transmitted to the auxiliary equipment.

(Structure of the Invention) To achieve the above object, the present invention is characterized by a casing and a power transmission shaft supported within the casing that transmits engine power to a propeller shaft for propulsion of a ship. In a power transmission device for a small boat, the -= end of the power transmission shaft is made to protrude outside the casing, this protruding end is used as a free end, and the protruding end of the power transmission shaft is used to transmit power to auxiliary equipment such as a generator. The point is that a pulley around which the transmission belt is wrapped is attached.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is a small fishing boat, 2 is an engine,
3 is a propeller shaft having a propeller 3a, and 4 is a power transmission device. The engine 2 and the power transmission device 4 are interlocked and connected via a universal joint shaft 5, and power from the engine 2 is transmitted to the propeller shaft 3 via the power transmission device 4. The ship 1 is propelled by the drive of the propeller shaft 3.

The engine 2 is supported by rubber mounts 7a on a pair of engine beds 7.7 provided on both sides of the bottom of the ship.
This rubber mount) 7a absorbs vibrations of the engine 2. Further, the power transmission device 4 is connected to this engine bed 7.
7 and supported by a bracket 8.

The power transmission device 4 will now be described with reference to FIGS. 2 to 5.

The power transmission device 4 is provided in front of the engine 2 and approximately in the center of the ship in the width direction. This power transmission device 4 has a casing 10, and an input shaft 11 serving as a drive shaft is supported in the upper part of the casing 10. The rear end of this human power shaft 11 protrudes from the rear wall of the casing 10 and is connected to the crankshaft of the engine 2 via the universal joint shaft 5.

Further, an output shaft 12 connected to the propeller shaft 3 is supported at the lower part of the casing 10, and the human power shaft 11 is connected to the propeller shaft 3.
and the output @12 are interlocked and connected by a gear type reverse speed reduction device 13.

The reversing speed reduction device 13 will be explained mainly with reference to FIGS. 3 and 4.

A hydraulic forward rotation friction clutch 15 is mounted on the input shaft ll.
is provided. Drive side 1 of this forward rotation friction clutch 15
5a is attached to the input shaft 11, and the driven side 15b of the forward rotation friction clutch 15 is rotatably supported around the axis of the human power shaft 11. And the above-mentioned normal rotation friction clutch 1
The driven side 15b of 5 and the output shaft 12 are connected to the gear reduction device 1.
7, and when the forward rotation friction clutch 15 is connected, the propeller shaft 3 rotates forward through the gear reduction device 17 and the output shaft 12, and the ship 1 moves forward.

- On the casing 10, a reverse rotation shaft 19, which is a driven shaft for the human power shaft 11, is rotatably supported, and this reverse rotation shaft 191 has a hydraulic reverse rotation friction flange 20.
is provided. The drive side 2 of this friction latch 20 for reverse rotation
0a is attached to the reversing shaft 19, and the driven side 20b of the reversing friction clutch 20 is rotatably supported around the axis of the reversing shaft 19. The drive side 15a of the forward rotation friction clutch 15 and the drive side 20a of the reverse rotation friction clutch 20 are interlocked and connected by the first gear means 21,
The driven side 20b of the reversing friction clutch 20 and the gear reduction device 17 are interlocked and connected at a second gear reduction gear 22,
The gear reduction device 17 and the output shaft 12 are connected by the disconnection operation of the forward rotation friction clutch 15 and the connection operation of the reverse rotation friction clutch 20.
The propeller shaft 3 is reversed through the , and the ship 1 moves astern.

First and second generators 23 and 24, which are auxiliary machines, are provided on both sides of the power transmission device 4. On the other hand, the above casing 1
A power output shaft 25, which is a power transmission shaft that transmits the power transmitted from the input shaft 11 to the first generator 23, is rotatably supported on the 0, and this power output shaft 25 is coaxial with the input shaft 11. It is supported by the casing 10. The above power take-off shaft 25
The rear end of the vehicle is connected to the 2-man rickshaw 11 via a hydraulic friction clutch 26.

” The second station rubbing lunch 26 is composed of a driving side 26a attached to the input shaft 11 and a driven side 26b attached to the power take-off shaft 25. Further, a hydraulically operated lock piston 26c is provided to lock the driven side 26b to the casing 10 side so that the driven side 26b does not rotate with the driving side 26a during the cutting operation of the loaf scraping lunch 26.

The front end of the power take-off shaft 25 protrudes from the front wall of the casing 10 and is a free end, and the front end of the power take-off shaft 25 is connected to the first generator 2 through the first belt winding stage f 27.
3.

To explain the first belt winding means 27, a driving pulley 27a is attached to the protruding end of the power take-off shaft 25, while a driven pulley 27b is attached to the first generator 23, and both pulleys 27a, A V-belt 27C for power transmission is wound around the belt 27b. In the above case,
A spline 27d is formed at the protruding end of the power take-off shaft 25, and a drive pulley 27a is removably fitted onto the spline 27d. Further, the drive pulley 27a is prevented from being removed from the power take-off shaft 25 by a retaining plate 27e screwed to the end face of the power take-off shaft 25 by a bolt 27f. As a result, the drive pulley 27a
is supported by a power take-off shaft 25.

The rear end of the reversing shaft 19 protrudes from the rear wall of the casing 10 and is a free end, and the rear end of the reversing shaft 19 is connected to the second generator 2 through a second belt winding means 28.
connected to. The configuration of the second belt winding means 28 is the same as that of the first belt winding stage 27, and includes a driving pulley 28a, a driven pulley 28b, a V-belt 28c, a spline 28d, a retaining plate 28e, and a pole 28f. are doing.

In addition, in the above configuration, each clutch 15°20.26
A pressure oil supply device 29 is provided for supplying low pressure oil between the friction plates and the like, and for supplying high pressure oil to the hydraulic cylinders of each of the clutches 15, 20, and 26.

Referring to FIGS. 4 to 6, the pressure oil supply device 29 will be described. A trochoid type low pressure pump 30 is attached to the casing 10. This low pressure pump 3
0 is connected to the forward rotation friction clutch 15 via the third rotation means 31.
It is interlocked and connected to the drive side 15a of. Further, a gear type high pressure pump 32 is attached to the casing 10, and this high pressure pump 32 is interlocked and connected to the front end of the reverse rotation shaft 19. Then, the oil pan 33 formed on the side of the casing 10 and the suction part of the low pressure pump 30 are connected. Also,
The discharge part of this low pressure pump 30 is connected to the input shaft 11 between the friction plates of each of the clutches 15, 20, and 26 through a low pressure oil passage 35 and a pressure regulating valve 36 provided in the middle of this low pressure oil passage 35. The sliding portion between the friction clutch 15 and the driven side 15b and the sliding portion between the reversing shaft 19 and the driven side 20b of the reversing friction clutch 20 are connected to each other, and low pressure oil is supplied thereto.

The discharge part of the low pressure pump 30 is connected to the high pressure pump 32, and the discharge part of the high pressure pump 32 is connected to the pressure regulating valve 36, the first high pressure oil passage 37, the communication passage 38, and the forward/reverse switching operation. Forward rotation friction clutch 15 via valve 39
and each hydraulic cylinder of the reverse rotation friction clutch 20. Further, the discharge portion of the high-pressure pump 32 is communicated with an auxiliary equipment operation cut-off valve 41 through a second high-pressure oil passage 40, so that the auxiliary equipment operation is cut off! jr41 connects the friction clutch 2 through the oil passage 40b.
The seventh auxiliary machine operation cutting valve 41 is connected to the lock piston 26c through a lock oil passage 40a. 42 is a flange pressure, igI valve adjustment, and 43 is a low pressure adjustment 5F.

” The second pressure regulating valve 36 will be explained in more detail.

The pressure regulating valve 36 is a throttle valve 45 and a cutting valve linked to the throttle valve 45. 46. The throttle valve 45 has a valve hole 47 formed on the axis of the low pressure oil passage 35, and a valve hole 47 formed on the axis of the low pressure oil passage 35.
It consists of a spool-type valve body 48 that slides inside. Further, a throttle hole 49 is formed on the axis of this valve body 48 , and this valve body 48 is urged toward the upstream side of the low-pressure oil passage 35 by a spring 50 .

J-kiri F7 square 46 is constructed as follows. That is, when the valve body 48 is pressed against the upstream side of the low pressure oil passage 35 by the spring 50, the low pressure oil passage 35 and the communication passage 3
8 and the low pressure oil from the low pressure pump 30 is communicated with the communication path 3.
8 and the forward rotation friction clutch 1 through the forward/reverse switching operation valve 39.
5 and the reverse rotation clutch 20. On the other hand, when the valve body 48 moves to the downstream side of the low pressure oil passage 35 against the spring 50, communication between the low pressure oil passage 35 and the communication passage 38 is cut off, and communication between the first high pressure oil passage 37 and the communication passage 38 is interrupted. The high pressure oil is communicated with the forward rotation friction clutch 15 and the reverse rotation friction clutch 2.
0 hydraulic cylinder.

Next, the effects of the configuration of the pressure oil supply device 29 will be explained.

When the input shaft 11 rotates at a low speed, the discharge amount of the low pressure pump 30 is small, so that the valve body 4 of the pressure regulating valve 36
The pressure difference between the front and rear portions of the tr body 8 becomes smaller, so that the tr body 48 is pushed by the spring 50 and the low pressure oil passage 35 and the communication passage 38 are communicated with each other. As a result, the forward rotation friction clutch 15
The connecting operation of the friction clutches 15 and 20 for reverse rotation is performed by low pressure oil, and therefore these clutches 15, 20
A slight slip is generated between each driving side 15a, 20a and driven side 15b, 20b, and this slip absorbs the pulsation of the engine 2 at low speeds.

As a result, the generation of noise in the engine 2 at low rotation speeds is prevented.

Next, when the input shaft 11 rotates at high speed, the discharge part of the low-pressure pump 30 becomes large, and the differential pressure across the valve body 48 becomes large.
The first high-pressure sleeve 37 and the communication path 38 are brought into communication with each other by being pushed and moved against the pressure.

As a result, at high speeds, the high-pressure oil provides reliable engagement in the forward rotation friction clutch 15 and the reverse rotation friction clutch 2o. On the other hand, since high-pressure oil is constantly supplied to the auxiliary equipment operating Kiribayashi brake r41 by the high-pressure pump 32, when the auxiliary equipment operating cutoff (+ valve 41 is operated to connect the friction clutch 26, this friction clutch 26 Reliable connection operation can be obtained.

Further, when the friction clutch 26 is disengaged, pressure oil is supplied to the lock piston 26c through the lock oil passage 40a, and the driven side 26b of the friction clutch 26 is locked to the casing 10 side, thereby preventing co-rotation. .

(Effects of the Invention) According to the present invention, one end of the power transmission shaft is made to protrude outside the casing, this protruding end is used as a free end, and the protruding end of the power transmission shaft is used to transmit power to an auxiliary machine such as a starting TL machine. Because the pulley around which the belt is wrapped is attached, the outside of the protruding end of the power transmission shaft is open, and there is no obstacle to attaching or detaching the belt. There is no need for extra work such as disconnecting the shafts as described in the above, and the work of attaching and detaching the belt can be done easily.

In addition, since the above pulley was attached to the power transmission shaft of the power transmission device, conventionally the pulley was attached to the crankshaft of the engine, which has the disadvantage that belt tension is additionally applied to the bearing of the crankshaft, which normally has a large load. can be avoided.

Furthermore, as described above, since the pulley is not directly attached to the crankshaft as in the conventional case, transmission of engine vibrations to the auxiliary equipment is suppressed. in this case,
The power transmission shaft consists of a drive shaft connected to the engine side and a driven shaft connected to the propeller shaft side, the driven shaft is interlocked with the drive shaft by gear means, and one end of the driven wheel is connected to the outside of the casing. When a pulley is attached to the protruding end of the gear, the gear means has backlash due to its structure, so vibrations from the engine are absorbed to some extent. Therefore, transmission of engine vibrations to the auxiliary equipment side is more effectively suppressed.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a schematic side view of a ship, Fig. 2 is a side view of a power transmission device, and Fig. 3 is a schematic side view of a ship.
Fig. 4 is a sectional view taken along the line rV-IV in Fig. 3, Fig. 5 is a simplified vj diagram of the pressure oil supply device, and Fig. 6 is a sectional view of the pressure adjustment go . l...Ship, 2...Engine, 3.Fist floper shaft, 4...
Power transmission device, 10...Casing, 11...Manpower shaft (
drive shaft), 19... reverse rotation shaft (power transmission shaft, driven shaft), 2
1. 1st south car means, 23. 1st power generation a (auxiliary equipment), 2
4. Second engine 1 [machine (supplement a), 25φ power take-off shaft (
Power transmission shaft), 27a, 28a** Drive pulley, 27c
, 28c1V belt.

Claims (1)

[Claims] 1. A power transmission device for a small boat having a casing and a power transmission shaft supported within the casing and transmitting the power of the engine to a propeller shaft for propulsion of the ship. A small boat characterized by having one end protruding outside the casing, using this protruding end as a free end, and having a pulley attached to the protruding end of the power transmission shaft around which a power transmission belt to an auxiliary machine such as a generator is wrapped. power transmission device. 2. The power transmission shaft consists of a drive shaft connected to the engine side and a driven shaft connected to the propeller shaft side, the driven shaft is interlocked and connected to the drive shaft by gear means, and one end of the driven shaft is connected to the casing. 2. The power transmission device for a small boat according to claim 1, wherein a pulley is attached to the projecting end of the projecting end.