JPS58188789A - Lubricant cooler for outboard machine - Google Patents

Abstract

PURPOSE:To promote the cooling of lubricant and to prevent the deterioration, by immersing the power transmission between an engine and propeller into lubricant in the immersing chamber while leading the lubricant to the outside by a pump then returning. CONSTITUTION:The rotation of engine is transmitted through a drive shaft 29 and power transmission 15 to the propeller shaft 31. A lubricant immersing chamber 51A is provided around said transmission 15 while a hollow chamber 51B is provided around the lower end of the drive shaft 29 to form the lubricant containing chamber 51 with the casing front chamber 51C and said three chambers. The chambers 51A and 51B are conducted through a hole 66 while the chambers 51A and 51C are conducted through a path 67. A lubricant tank 68 arranged with cooling water bypaths 95 will conduct through conduicts 71, 72 with the chambers 51C, 51B while a trochoidal pump 73 will cool and circulate the lubricant in said chamber 51 continuously through a tank 68.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricant cooling device for lubricating a power transmission mechanism of an outboard motor.

Inside the casing of an outboard motor, the driving force of the engine guided by a drive shaft disposed in a substantially vertical direction is transmitted to a propeller shaft disposed in a substantially horizontal direction. A power transmission mechanism is provided which has a function of providing propulsion force to the propeller and a switching function of switching the rotation of the propeller to a medium state that is not one of forward/I direction, reverse direction, and forward/backward direction. ing. Since this mechanism is generally constituted by a combination of a plurality of southeast elements and requires a supply of lubricating oil, the periphery of this mechanism is filled with lubricating oil to form a lubricating oil V-immersion chamber.

3) If this outboard motor is used at high speed for a long period of time, the temperature of the lubricating oil will rise by -L due to the heat generated by the power transmission mechanism, and the temperature of the Q1 lubricating oil itself will increase. There are 16 things that cause deterioration and cause trouble.

Because of this, the oil temperature in the lubricating oil immersion chamber increased by -L. There is an outboard motor equipped with a circulation path in which the lubricating oil is led out to the outside and returned to the lubricating oil immersion chamber. However, in the conventional (I# ring system r, the driving force for circulating the lubricating oil
It uses the rotational force of the gears of the power transmission mechanism itself, and although its circulation capacity is high (rather than circulation, it is a stirred Sb VCJ process). The oil temperature is 1-H because the lubricating oil is not cooled by light.
The risk of trouble occurring due to this was not completely eliminated.

The present invention was made in view of the above problems, and aims to promote cooling of lubricating oil that lubricates a power transmission mechanism, prevent its deterioration, and maintain good lubrication of the power transmission mechanism at all times. .

In order to achieve the above-mentioned object, the present invention is arranged such that a circulation bonzo is disposed in a circulation path that once leads lubricating oil out of the lubricating oil immersion chamber and returns it to the lubricating oil immersion chamber.

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

FIG. 1 is a partially cutaway @ side view of an outboard motor showing an embodiment of the present invention, FIG. Figure I-1! It is a sectional view along Iil.

The outboard motor 11 includes a cowling 13 that houses an engine (not shown), a lower casing 19 that houses the power transmission mechanism 15 and attaches a propeller 17, and a casing 21 that connects the cowling 13 and the lower casing 19. , the hull 27 via a swivel bracket 23 and a clamp racket 25 provided on the upper casing 21.
Upper part and 7: [A, tilting opening] are attached to the cage.

The engine that is housed inside the cowling 13 is the shoe shaft M.
The drive shaft 2 is a straight type and guides the driving force of this engine.
9 is disposed substantially perpendicularly to the horizontal direction, passing through the hinges 21 and 19. 10 bellows @ 31 are disposed on the bottom casing 19 approximately half way across from t, and a 7" bellow 17 is fixedly attached to this 7" bellow 41131. and no-fu axis 31 and 1 machining approximately 90
In addition, since the amount of rotational force of the propeller 111131 must be changed to the ship's propulsion force 10'', that is, forward movement (& forward movement and - to match the neutral state), there is a bend in the skin part of both shafts. Is the recording force transmission mechanism 15 set? There is a "C".

This power transmission machine costs $1! M, the small bevel gear 33 that is fixed to if of the drive shaft 29, and this small bevel gear 33.
The claws that engage with the claws of the dog clutch to be described later are moved south, and the forward lug and bevel teeth 1 provided on the Itf rope 7 shaft 31 for free rotation are fitted with 35A and a felling gear. The gear 35B is engaged with the propeller shaft 31 in a linear manner so as to be integral with the propeller shaft 31, and the gear 35B is engaged with the propeller shaft 31 in a linear manner so as to be integral with the propeller shaft 31, and the gear 35B is engaged with the propeller shaft 31 in the axial direction of the rover shaft 31 by a distance t. A dog clutch 37 has a pawl that engages with a pawl provided on the bevel gear 35B, and the pawl of this dog clutch 31 is selectively connected to the pawl of the forward bevel gear 35A and the bevel gear 35B. For dog clutch 31? A shift rod 39 is supported and provided with a moving port in the direction of the internal axial force of the 10 bellows shaft 31, and a shift rod 39 is provided with a forward, neutral, and reverse movement in order to move the shift rod 39 forward and backward in response to an external operating force. The shift cam 41 moves in the cam direction tM. However, the drive shaft 29
is caused by the bearing 43 in the upper part of the lower casing 19.
) - (Spinally supported, and is pivoted at the lower part by a bearing 45. The propeller shaft 31 is connected to the forward bevel gear 35A.
The bearing 47 is also pivotally supported on the lower casing 19 by a bearing 47, and the reverse bevel tooth tL35B is also pivotally supported on the F section casing 19 by a bearing 48 via a propeller bearing member 49. It is independently pivoted to the lower sheathing 19 via a member 49.

The driving force of the l of-ni drive @29 is as follows: For example, when the claw of the 4t35A is engaged with the dog clutch 37 (11) due to the operation of the shift cam 41°7/nozzle rod 39, is the small bevel gear 3
3, Oi, I dm bevel gear 35A5 Transmitted to the -7' propeller #@31 via the dog clutch 37, and when going backwards 1/c uses the backward bevel gear 35B instead of the forward bevel southeast 35A. i L, '7' is transmitted to the lobela shaft 31 and causes the propeller 17 to generate forward thrust and reverse thrust, respectively. 1. If the dog clutch 37 does not mesh with either of the bevel gears 35A and 35B, that is, the neutral position. Both bevel gears 35A and 35Bri only rotate freely around the 7" Lobef@31, and the driving force is transmitted.
i: L 11.

51e" lubricating oil 14X each chamber, doto casing 1
9 front platform 53, lower wall 55, propeller bearing member 49,
The intermediate wall 57, which will be described later, is defined by the water bonding panel 59 and the partition wall 61. A cylindrical hollow chamber 51B is formed in the intermediate wall 57,
The drive shaft 29 is inserted into the hollow chamber 518, and the Ponzo housing 59rt is inserted into the hollow m51.
It is fitted to the upper end of B.

An oil seal 63 is provided between the rotary roller bearing member 49 and the propeller shaft 31, and an oil seal 65 is also provided between the travel shaft housing 59 and the drive shaft 29. is liquid-tightly sealed and contains iR lubricant inside. 51 AFi, the power transmission mechanism 15f is located at the lowest part of the lubricating oil storage chamber 51 and is always immersed in lubricating oil even if the number of devices is reduced to some extent. Further, the 51CrtF section is a casing front chamber formed in the section facing III of the casing 19. Therefore, the lubricating oil storage chamber 51 is formed from a royal chamber consisting of a lubricating oil immersion chamber 51A, a hollow chamber 51B, and a casing front chamber 51G. And the lubricating oil immersion chamber 51A and the hollow chamber 51B! The lubricating oil immersion chamber 51A and the casing screen chamber 51G communicate with each other through a forward and backward movement path 61 through which the shift cam 41 moves forward and backward.

It is a 68 mm oil tank, which is housed in the cowling 13, communicates with the hollow chamber 51B via the first communication passage 69, and connects the second communication passage 71 to the cowling @ face chamber 51C. It communicates with

(7) The hollow chamber 51B and the casing front chamber 51G are communicated with these passages 69.71 and the lubricating oil tank 68i/l. Therefore, the lubricating oil immersion chamber 51
A, through hole 66, hollow chamber 51B1, first communication path 69, lubricating oil tank 68, second communication path 11, sheathing f3t1
The surface chamber 51G forms a circulation path of 72 ft as a whole. ◎ 73 is a trochoid bong as a circulation pump provided in the circulation path 72! It is. The trochoid bone 173e is attached to the drive shaft 29 in the hollow chamber 51B, and the trochoid bones 173e and 14 drive shafts 4), which are sandwiched between the upper housing 75 and the upper housing 77, are arranged coaxially with each other. The inner gear 79 and the outer southeast 81 are installed.
Consisting of 1+,,-(internal gear/911.1 south 11
9 is formed by the coid curve, -\-83v
(The number of teeth is one more than the t19S tooth east 81μ internal gear 79 that is fixed to the drive @ 29, and the drive shaft 29
is not fixed. The upper housing 75 and the lower housing 17 have a discharge port 85 and a suction port 86, respectively.
are provided and communicated with the hollow portion 51B and the through hole 66, respectively. The internal gear 79 is driven by the drive shaft 29, and as the internal gear 790 rotates, the external gear 81 rotates.Furthermore, the number of teeth of the external gear 81 is greater than the number of teeth of the internal gear 79, so these The space formed between the pumps is repeatedly expanded and decreased by the rotation of the internal gear 79, thereby performing a pumping action, thereby allowing forcible suction and discharge.

87Fi engine cooling water intake, 89t water intake pipe, 9
1 is a cooling water bong! , 93 is a water supply pipe to the engine, and as in the conventional structure, when the cooling water cylinder 7''91 is driven by the drive shaft 29, outside water is introduced from the intake port 87, and the water intake pipe 89, the cooling water, Cooling water is supplied to the engine through the water pipe 93 inside the pump 91. However, in this embodiment, a portion of the cooling water is transferred to the fA oil tank 68 until t.
A bypass 'r6p<Ihax communication w195 is provided in the J'. Bypass passage 95I Go lubricating oil tank 68
In order to maximize the contact area with the lubricating oil inside the casing 21, it is formed in a spiral or serpentine shape, and the VC inside the casing 21 is opened to the itl that comes out of the lubricating oil tank 68.

A VC is installed so that the water inside the aJL is discharged to the outside together with the cooling waste water from the Encinka.

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

-1- The drive shaft 29 rotates IP1 due to the drive of the engine, and the c7'' u bellows shaft 31 is rotated via the power transmission mechanism 15. Forward or reverse thrust is obtained by selective operation such as c, etc. If this state continues for a relatively long time, the power transmission mechanism 15 generates heat, and this heat is transmitted to the surrounding lubricating oil, which gradually becomes hotter. However, as the drive shaft 2901r rotates, the trochoid bomb F73 also operates.
A simple beak exit hole 6 in the lubricating oil immersion chamber 51A.
Take 6 and put out 7゛ (suction and μ to 51B).1
1 out σ no 1. Furthermore, the hollow chamber 51B, the first communication passage 69, the lubricant tank 68, the second communication tank 71, and the front chamber 510'ftM
Finally, I returned to the lubricating oil-soaked room. However, during this time, the lubricating oil is cooled, and in particular, it is sufficiently cooled by contacting the cooling water bypass passage 1195 in the lubricating oil tank 6B.

Therefore, since cooling of the lubricating oil is promoted, deterioration of the lubricating oil can be prevented, and [i'N of the power transmission mechanism can be maintained at a good level at all times. Further, in the case of the above embodiment, the lubricating oil tank 68
Separately, just in case, the lubricating device can be secured, and the lower casing 19f: @lubricant tank 6 can be installed without removing it.
By looking at the state of the lubricating oil in the lubricating oil immersion chamber 51A, the lubricating oil condition in the lubricating oil immersion chamber 51A can be known, making maintenance and management of the lubricating oil extremely easy.

In the above embodiment, a cooling water bypass passage 95 is provided in the lubricating oil tank 68, but this does not necessarily have to be provided. Furthermore, the lubricating oil tank 68 is not an essential item, and the lubricating oil leaving the hollow chamber 51B is stored in the second tank.
The communication path 97 shown as an imaginary line in the figure immediately connects the
In this case, you can return to the t-side room 51C.
'y-/n! mmnd51 Crj:Aitui+W5
3 cases 1. C9 $ Contact with water - (Climb, open water C [
Since loquat 2t4' is moving, Jun 6 has light cooling power.

1', J, 1-, the present invention cL1 anti-lubricant oil immersion chamber θ, ra-U, ri 1-V) String-j jl
+sj Since we installed a circulation bomb 'f in a certain route, the heat from the power transmission mechanism...
-, J tears”] Nameyama QL-I will stagnate in J.I
- Naguri・+i llll circulation<t I F Tsuno 1,
During this time, the deterioration can be prevented by cooling the surface sufficiently, and the simplicity of the rocky structure can be maintained in good condition.

[Brief explanation of drawings]

No. 1 is an outboard motor incorporating an embodiment of the present invention.
iB fi: Broken surface 1011, Fig. 2
Ill-111N4 (" rf) in Figure 2
At face 1...now. 15°°° moving horn transmission mechanism, 19゛ to casing, 29゛ drag 1 drag 411, 31゛ globe shaft, 5
1A・Runsei Oil Condition Compensation, T2...Circulation Route, 73 Trochoid Bonde (Circulation Bonder). Agent: Shuji Shiokawa, Figure 2, Figure 3, Figure 1

Claims (1)

[Claims] A power transmission mechanism that transmits the rotational force of the drive shaft driven by the engine to the propeller shaft is disposed inside the caning, and this power transmission mechanism is provided with a lubricant immersion chamber that is immersed in lubricant oil. (f) A lubricating oil cooling device in which the outboard motor has a circulation path in which the lubricating oil is once brought outside from the immersion chamber and returned to the lubrication oil immersion chamber, and a circulation pump is disposed within this path.