JPS6124477Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a lubricating oil system for an outdrive unit of a ship.

Conventionally, outdrive units, which are installed on the outboard stern of small ships in particular, transmit the output of an internal combustion engine mounted inside the ship from a power shaft via a universal joint, etc. to an input shaft with a pinion. The propeller shaft installed at the bottom of the outdrive unit is rotated through a forward rotation gear, a reverse rotation gear, a clutch device, a clutch shaft, and a drive shaft. It consists of an upper gear case that has a normal gear below the lubricating oil level, and a lower gear case that houses the drive shaft and propeller shaft. Therefore, in an outdrive unit in which the joint between the upper gear case and the lower gear case is completely sealed with a packing material, and the upper gear case is filled with lubricating oil without providing an oil pump,
When heated lubricating oil is repeatedly used at the top of the Atsupa gear case to lubricate each gear and bearing,
This is a problem because the temperature of the lubricating oil increases, leading to its early deterioration and the risk of damaging the tooth flanks of each gear.

In recent years, the load on these gear parts has increased, and a solution to this problem is desired.

In addition, some models use a gear pump or center type pump to supply sufficient lubricating oil from the reverse gear part at the top of the Atsupa gear case to the area around its bearing and pinion part, but these oil pumps are not recommended. As a result, the outdrive unit has a plurality of structures, so there is a demand for simplifying the structure.

Therefore, the present invention was devised to meet the above-mentioned conventional demands, and by using the cooled lubricating oil in the lower gear case of the outdrive unit to lubricate the gears and bearings in the upper gear case, the lubricating oil can be reduced. In addition to preventing early deterioration of
The purpose is also to prevent damage to the tooth flanks of the gear.

That is, the present invention has a substantially horizontally arranged input shaft having a pinion at the shaft end, a substantially vertically arranged clutch shaft, and a clutch shaft which is always engaged with the pinion on the input shaft and is rotatably provided at intervals above and below the clutch shaft. Rotating gears 18 and 13 are constantly rotating, and the clutch shaft 14 is connected between the rotating gears 18 and 13.
an upper gear case 10 including a clutch device 27 slidably inserted into the clutch shaft 14; and a drive shaft 15 interlockingly connected to the clutch shaft 14.
and lower gear case 2 with built-in propeller shaft device
In the outdrive unit consisting of 0,
The rotating gear 1 below the constantly rotating rotating gears 18 and 13 rotatably provided on the clutch shaft 14
An oil pump 19 is attached to the lower part of the propeller shaft 3, and the suction port of this oil pump is communicated with the inside of the lower case through an oil guide provided concentrically covering a drive shaft for driving a propeller shaft.

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

First, the outdrive unit 1 in the embodiment of the present invention shown in the drawings is pivoted on two left and right arms of a transom plate 3 fixed to the rear of the hull 2 with bolts, each using a pin 4 as a fulcrum. Swivel fork 5 and its axis 6
It is attached so that it can be tilted vertically and horizontally.

Next, the output of an internal combustion engine (not shown) mounted in the hull 2 is transmitted from the power shaft 7 to the universal joint 9 built in the bellows-shaped tube 8 and the almost horizontally arranged The signal is transmitted to the input shaft 11, and the pinion 12 is fixedly attached to one end of the input shaft 11.
(always rotating) is transmitted to a clutch shaft 14 and a drive shaft 15 via a forward rotation gear 13, and a propeller shaft 16 causes a propeller 17 to rotate. Note that the upper rotating gear (reverse gear) 18 is rotating during normal rotation.

When the propeller 17 is reversed,
(At this time, the clutch 27 slides upward and engages with the gear 18.) Rotation is transmitted from the clutch 27 to the drive shaft to the propeller shaft to the propeller.

Therefore, in the present invention, an oil pump 19 is attached to the lower part of the rotating (normal rotation) gear 13 below the lubricating oil level L, and is constantly rotated together with the rotating gear 13, and the suction port of the oil pump 19 and the pinion shaft 16 are built in A pipe material is fitted over the drive shaft 15 to form an oil guide 21 so as to communicate with the inside of the lower gear case 20. That is,
The upper end of the oil guide 21 made of this pipe material is
It is fitted into a member of the upper gear case 10 that forms the suction port of the oil pump 19, and its lower end is fitted into the bearing holder 22 of the drive shaft 15 to communicate with the inside of the lower gear case 20.

This bearing holder 22 has a suction hole 23 that allows lubricating oil to communicate with the lower gear case 20 and a suction hole 23 that allows lubricating oil from the Atsuppa gear case 10 to communicate with the lower gear case 20.
A discharge hole 24 is provided below the discharge hole 24 so that the lubricating oil flows down to the lower part of the lower gear case 20 and its temperature is made uniform. ing.

Therefore, in the lubricating oil device of the present invention, the lubricating oil cooled in the lower gear case 20 passes through the oil guide 21 from the suction hole 23, is sucked by the oil pump 19, and is then sucked into the oil supply pipe 20 as shown by arrow F.
6, the rotating gear 18 and its bearings, as well as the pinion 12 and its shaft 11, etc. are lubricated from the upper part of the rotating gear 18, and the heated lubricating oil is transferred to the atsupa gear case 10 as shown by arrow E. The oil descends between the oil guides 21, enters the lower gear case 20 from the discharge hole 24 along the rib-cum-guide 25, and is cooled.

In the device of the present invention, the oil pump 19 is installed at the bottom of the rotating gear (normal rotation gear) 13, so that the above-mentioned circulation of the lubricating oil is always carried out even when the clutch is in the neutral state. It is being said.

Therefore, in an outdrive unit to which the lubricating oil device of the present invention is applied, the lubricating oil cooled in the lower gear case is constantly used to lubricate each gear part and bearing part in the upper gear case while the engine is rotating. Since the heated lubricating oil is circulated within the lower gear case, it is effective in preventing early deterioration of the lubricating oil regardless of whether the propeller shaft is rotating or not.

Furthermore, since lubrication can be performed using cooled lubricating oil, it is also effective in preventing damage to the gear tooth surface.

Furthermore, in the lubricating oil device of the present invention, a tubular oil guide is provided concentrically on the outside of the drive shaft to cover it and serve as a lubricating oil passage, so a conventional case can be used as is, reducing costs. It also has the advantage of being cheap and compact.

[Brief explanation of the drawing]

The drawing is an assembled sectional view of an outdrive unit in an embodiment of the present invention. 1...Outdrive unit, 10...Upper gear case, 13...Rotating gear, 14...Clutch shaft, 15...Drive shaft, 18
...Rotating gear, 19...Oil pump, 20...
Lower gear case, 21...Oil guide, 22...
...Bearing holder.

Claims (1)

[Scope of utility model registration request] An almost horizontally arranged input shaft 11 having a pinion 12 at the shaft end, and a nearly vertically arranged clutch shaft 1
4. A constantly rotating rotating gear 18 that is always engaged with the pinion 12 on the input shaft 11 and is rotatably provided at intervals above and below the clutch shaft 14;
13, an upper gear case 10 comprising a clutch device 27 slidably fitted into the clutch shaft 14 between the rotating gears 18 and 13; a drive shaft 15 and a propeller operatively connected to the clutch shaft 14; In an outdrive unit consisting of a lower gear case 20 containing a built-in shaft device, an oil pump 19 is attached to the lower part of the rotating gear 13 below the constantly rotating rotating gears 18, 13 rotatably provided on the clutch shaft 14, and further A lubricating oil system for an outdrive unit of a ship, characterized in that the suction port of this oil pump communicates with the inside of the lower case through an oil guide provided concentrically covering a drive shaft for driving a propeller shaft.