JPH0321589A - Vessel propulsive machine with a plurality of drive shafts - Google Patents

Abstract

PURPOSE:To enhance the lubricating performance by arranging helical gears mounted on a plurality of vertical drive shafts in the upper space leading to the oil filled region, and allowing this upper space to communicate with the part below this oil filled region via an oil circulative path. CONSTITUTION:Two parallel drive shafts 13, 14 are installed vertically, and an engine unit leading to the top end of the No.1 drive shaft 13 is rotated to rotate the two shafts 13, 14 reversely through helical gears 19, 20, which mesh with each other. With the rotation of these shafts 13, 14, a single propeller shaft 24 is rotated through meshing of gears 33, 34 with pinions 31, 32 in a gear accommodation chamber 23 formed in the lower part of a casing 11. In this type of a propulsive machine, the upper space communicating to oil chambers 21, 22 formed around the drive shafts 13, 14 is allowed to work as an interlock chamber 60 in which the two helical gears 19, 20 are installed, and this interlock chamber 60 is put in communication with the gear accommodation chamber 23 via an oil circulation path 55.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a marine vessel t(fi), such as an outboard motor or an inboard/outboard motor, which is equipped with a plurality of drive shafts.

[Prior Art] Conventionally, as shown in USP 3,492,966, a marine propulsion device including a plurality of drive shafts has been proposed.

This marine propulsion device supports a plurality of mutually interlocking drive shafts within a casing, and supports within the casing one propeller shaft that intersects with the axis of each drive shaft.
A binion is fixed to the end of each drive shaft, and a gear that meshes with each of the above-mentioned binions is attached to the propeller shaft. It is configured to transmit the rotational force of each drive shaft to the propeller shaft.

By having a plurality of drive shafts in the marine propulsion device, the load transmitted by each drive shaft to each gear can be reduced to approximately one-multiple of the total load, and as a result, the gear diameter can be reduced. This means that the diameter (propulsion direction projected area) of the bulging torpedo formed around the gear storage chamber in the casing of the marine propulsion device can be reduced, the resistance of the casing to water flow can be reduced, and the speed can be increased.

However, as a specific arrangement for making the respective drive shafts interlocked with each other, the upper space in the casing connected to the oil-filled area is used as an interlocking chamber, and a helical gear is provided in each portion of each drive shaft located in the interlocking chamber. It is conceivable to attach the helical gears attached to adjacent drive shafts so that they mesh with each other, and to provide an upper bearing and a lower bearing supporting the Tritz shaft above and below the helical gear attachment portion on each drive shaft.

[Problems to be Solved by the Invention] In the marine propulsion device, the torpedo diameter of the casing can be made small, but the volume of the oil filling region and the amount of oil filled are small.

Therefore, in the above marine propulsion system, it is necessary to reliably lubricate the gear, pinion, and each drive shaft immersed in the limited and relatively small oil-filled area. There is. Furthermore, when using a helical gear as described above to enable each drive shaft to interlock, the helical gear rotates while being arranged in the upper space (interlocking chamber) connected to the oil-filled area. It is conceivable to use it as a lubricating gabong for the upper and lower bearings around the helical gear. However, even if the oil in the oil-filled area is sucked into the interlocking chamber via the lower bearing due to the rotation of the helical gear, the interlocking chamber does not have a passage to continuously discharge this sucked oil, and as a result, the helical gear is not effective. The pump cannot function as a proper pump, and cannot effectively lubricate the upper and lower bearings.

The present invention is capable of reliably lubricating gears, pinions, and each drive shaft immersed in a limited and relatively small oil-filled area in a marine propulsion device equipped with a plurality of drive shafts. The purpose is to do so.

Another object of the present invention is to effectively lubricate an upper bearing and a lower bearing that support a helical gear 2 for interlocking a drive shaft.

[Means for Solving the Problems] The present invention according to claim 1 supports a plurality of mutually interlocking drive shafts in a casing, and supports one blower shaft intersecting the axis of each drive shaft in the casing. A pinion is fixed to the end of each drive shaft, and a gear that meshes with each of the above pinions is attached to the propeller shaft.
A marine propulsion device comprising a pinion, and a plurality of drive shafts configured to be immersed in an oil-filled region in a casing at least on the lower end side of each drive shaft, and configured to transmit the rotational force of each drive shaft to the propeller shaft. The upper space connected to the oil-filled area in the casing is used as an interlocking chamber, and a helical gear is mounted on each portion of each dry saw shaft located in the movement chamber, and the helical gears mounted on adjacent drive shafts are meshed with each other. An upper bearing and a lower bearing supporting the drive shaft are provided above and below the helical gear mounting portion of each drive shaft, and an oil circulation path is provided that communicates the interlocking chamber with the lower part of the oil filling area. This is what I did.

The present invention according to claim 2 is the marine propulsion device according to claim 1, further comprising an oil circulation path formed around the upper bearing and connected to the interlocking chamber.

[Function] According to the present invention as set forth in claim 1, since the helical gear is disposed in the upper space (interlocking chamber) connected to the oil filling area and rotates, the helical gear can be used as a gear pump for lubrication. I can do it. In other words, the helical gear sucks the oil in the oil-filled area into the interlocking chamber via the lower bearing, and continuously discharges the oil sucked into the interlocking chamber toward the lower part of the oil-filled area via the oil circulation path. do.

As a result, the oil repeats the cycle of passing through the oil-filled area, the lower bearing, the helical gear, and the oil circulation path, and then returning to the oil-filled area.

For this reason, in a 1-ft vessel equipped with multiple drive shafts, the temperature inside the limited relatively small oil filling area is
, the gear, pinion, and each drive shaft immersed in the oil-filled area can be reliably lubricated.

In addition, the lower bearing that supports the helical gear for interlocking the drive shaft can be effectively lubricated. Further, according to the second aspect of the invention, a portion of the oil discharged from the helical gear functioning as a pump as described above circulates six times through the oil circulation path formed around the upper bearing.

Therefore, the upper bearing supporting the helical gear for interlocking the tripe shaft can be effectively lubricated.

[Example] FIG. 1 is a sectional view showing an embodiment of the present invention.

The marine propulsion device 10 has two mutually parallel drive shafts 13.
, 14 are vertically installed, the first drive shaft 13 is vertically supported from the upper casing 12 to the lower casing 11, and the second
The drive shaft 14 is vertically supported by the lower casing 1l. That is, the first drive IIll13
The second drive shaft 14 is supported by an upper bearing 16A, a lower bearing 16B, and a twenty-one dollar bearing 16C.

At this time, the upper bearings 15A and 16A are connected to the lower casing 11.
The lower bearing 15B is attached to the bearing box 17 fixed to the
16B and 21 dollar bearings 15C and 16C are lower casing 1
1. An upper oil seal l8 is attached to a portion of the bearing box 17 through which the first drive shaft 13 passes.

Note that an upper shim 101 is interposed between the upper end surfaces of the upper bearings 15A, 16A and the bearing box 17, and the lower bearings 15B, 1
A lower shim is interposed between the lower end surface of 6B and the lower casing l1.

Upper bearing 15A and lower bearing 15B of the first Tritz shaft l3
A first helical gear 19 is spline-coupled to the portion sandwiched between the upper full bearing 1 of the second drive shaft 14.
A second helical gear 20 is spline-coupled to the part sandwiched between 6A and the lower bearing 16B, and both helical gears 19,
20 mesh with each other to interlock both 1 to the rights shafts 13 and 14 with each other.

At this time, an engine unit (not shown) is connected to the upper end of the first drive shaft 13 via a forward/reverse switching gear train, etc., and both trites shafts l3 and l4 are moved to each other at the same speed by the engine output. Reverse.

A first oil chamber 21 is formed in the lower casing 11 at a portion sandwiched between the lower bearing 15B and the twenty dollar bearing 15c around the first drive shaft 13, and the lower casing 1
1 around the second Dritz shaft 14, the lower bearing 16
A second oil chamber 22 is formed in a portion sandwiched between B and the twenty-one dollar bearing 16C.

Further, a gear housing chamber 23 is formed in the lower part of the casing 11, and each Dryz shaft 13, 14 is placed in this gear housing chamber 23.
One propeller shaft 24 is supported, which intersects with the axis of the propeller. That is, the propeller shaft 24 is supported by a front 111q bearing 25, a rear bearing 26, and a twenty-one dollar bearing 27. The bearings 25 and 26 are mounted on the casing l1. Note that a rear oil seal 28 is attached to a portion of the rear end of the casing 11 through which the propeller shaft 24 passes.

A propeller 29 is fixed to the rear end of the propeller shaft 24 projecting outward from the lower casing 11.

It invades the gear housing chamber 23 of each Tritz shaft 13, 14.
At the lower end, there are a first pinion 31 and a second pinion 32.
are spline-coupled and fixed with nuts 103 and 104.

The two pinions 31, 3 are located at two positions on the propeller shaft 24, sandwiching the axes of the tripe shafts l3, 14, respectively.
A first gear 33 and a second gear 34 that mesh with each of the two gears are spline-coupled. As a result, both gears 33 and 34 are rotated in the same direction by being transmitted with the rotational force of each drive shaft l3 and 14, and as a result, the propeller shaft 24 is rotated.

At this time, the pack lash of the second pinion 32 and the third gear 34 is applied to the rear shim 35 interposed between the back surface of the rear bearing 26 and the casing 11, which supports the second gear 34 from behind. The pack lash of the first pinion 31 and the first gear 33 is adjusted by the press-fitting depth of the front bearing 25, which supports the first gear 33 from behind, into the casing 11. Further, around the propeller shaft 24 sandwiched between the gears 33 and 34, two collars 36 and 37 and one shim 38 interposed between the collars 36 and 37 are attached. The shim 38 functions as a spacing adjustment member that adjusts the spacing between the gears 33 and 34.

A nut 42 is screwed onto the front end 2 of the propeller shaft 24 protruding from the front +1111 bearing 25 via a washer 41. Further, at the front end of the casing 11 relative to the gear housing chamber 23, there is a ring nut 43 that holds the front bearing 25.
, a head bearing 44 that seals the gear housing chamber 23;
Cap lower 45 has a two-part structure for assembly from the front, and cap lower 45 is attached to casing 1.
An end cap 46 is attached as shown, which screws onto the head bearing 44 for attachment to the head bearing 44.

Further, in FIG. 2, 51 is a water pump, 52 is a water intake port, 53 is a water intake path, and 54 is a water supply channel.

However, in this embodiment, both oil chambers 21 and 22
, and the gear storage chamber 23 constitute the oil filling area of the present invention, and the upper space connected to both the oil chambers 21 and 22 is the interlocking chamber 60 of the present invention in which both helical gears 19 and 2o are disposed.

At this time, the lower casing 1l is provided with an oil circulation path 55 that communicates the interlocking chamber 6o and the gear housing chamber 23. Moreover, the bearing box 17 for both upper bearings 15A and 16A is
A slit-shaped oil circulation path 56 is formed around the upper bearings 15A and 16A and connected to the interlocking chamber 60.

Note that 57 and 58 are drain plaques made of magnets. The trench plug 57 closes the drain hole connected to the oil circulation path 55 and adsorbs and removes metal wear particles in the oil circulating in the oil circulation path 55.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, since the helical gears 19 and 20 are arranged and rotated in the upper space (interlocking chamber 60) connected to both the oil chambers 21 and 22, these helical gears 19 and 20 are connected to a lubricating gear pump. It can be used as That is, both helical gals 19 and 20 are connected to the oil chamber 2.
1 and 22 are sucked into the interlocking chamber 60 via the lower bearings 15B and 16B, and the oil sucked into the interlocking chamber 60 is continuously discharged toward the gear housing chamber 23 via the oil circulation path 55.

As a result, the oil is transferred to the gear storage chamber 23, the oil chamber 21,
22, lower bearings 15B, 16B, helical gear l9, 2
0, the oil returns to the gear storage chamber 23 via the oil circulation path 55, and the cycle is repeated.

For this reason, the ship propulsion P! is equipped with two drive shafts 13 and 14! At i10, the gear 3 is immersed in the limited relatively small gear housing chamber 23 and oil chambers 21 and 22.
3, 34, pinion 3l, 32, and Tritz shaft 13,
14 can be reliably lubricated.

Further, a lower bearing 15B supporting the helical gears 19 and 20
．． 16B can be effectively lubricated.

Furthermore, according to the above embodiment, a portion of the oil discharged from the helical gears 19 and 20 that function as pumps as described above is
Upper bearing 15A. The oil also circulates through an oil circulation path 56 formed around 16A.

For this reason, the upper bearing 15A. 16A can be effectively lubricated.

Incidentally, the present invention can also be applied to a marine vessel propulsion device having three or more mutually interlocking trites shafts.

[Effects of the Invention] As described above, according to the present invention, in a marine propulsion device equipped with a plurality of trites shafts, in a limited and relatively small oil-filled area, a gear immersed in the oil-filled area,
The pinion and each drive shaft can be reliably lubricated.

Further, according to the present invention, the upper bearing and the lower bearing that support the helical carrier for interlocking the drive shaft can be effectively lubricated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. IO... Marine propulsion device, 11... Casing, l3, 14... Drive shaft, 15A, 16A... Upper bearing, 15B, 16B... Lower bearing, 19, 20... Helical gear, 21, 22...Oil chamber (oil filling area), 23.
...Gear housing chamber (oil filling area), 31, 32...
Pinion, 33, 34...Gear, 55, 56...Oil circulation path.

Claims (2)

[Claims] (1) A plurality of mutually interlocking drive shafts are supported within the casing, and a single drive shaft interlocks with the axis of each drive shaft.
A main propeller shaft is supported in the casing, a pinion is fixed to the end of each drive shaft, and a gear that meshes with each of the above pinions is attached to the propeller shaft. A marine propulsion device having a plurality of drive shafts, each of which is partially immersed in an oil-filled region within the casing and configured to transmit the rotational force of each drive shaft to the propeller shaft, which is connected to the oil-filled region within the casing. The upper space is an interlocking chamber, a helical gear is mounted on each of the portions of each drive shaft located in the interlocking chamber, and the helical gears mounted on adjacent drive shafts are meshed with each other, so that the helical gear mounting portion on each drive shaft is provided. upper and lower bearings for supporting the drive shafts are provided above and below the drive shaft, and an oil circulation path communicating between the interlocking chamber and the lower part of the oil filling area is provided. ship propulsion system. (2) The marine vessel propulsion device comprising a plurality of drive shafts according to claim 1, further comprising an oil circulation path formed around the upper bearing and connected to the interlocking chamber.