JPH0791970B2 - Engine lubricator - Google Patents

Abstract

PURPOSE:To aim at the compactness of the upper and lower portions of side chambers on both sides of a crank chamber, and the prevention of air trapping by intercommunicating a transmission chamber and an oil sump to each other which are vertically provided on one side of the crank chamber, and further intercommunicating the upper and lower portions to the crank chamber and the oil sump, respectively. CONSTITUTION:A crank shaft 41 is horizontally disposed in a crank chamber 23, and then, a transmission chamber 25 and an oil sump 27 are vertically arranged sideward of the crank chamber in the direction perpendicular to the longitudinal direction of the crank shaft 41. The transmission chamber 25 and the oil sump 27 are partitioned from each other by means of partition walls 87, 89 so as to be intercommunicated in such a way that oil flows down. On both sides of the crank chamber in the longitudinal direction of the crank shaft 41, there are respectively disposed a left side chamber 29 provided with a sprocket 47 and a generator 49 therein and a right side chamber 31 provided with gears 51, 53, 55, and further, the upper and lower portions of both side chamber 29, 31 are intercommunicated to the crank chamber 23 and the oil sump 27, respectively.

Description

Description: TECHNICAL FIELD The present invention relates to an engine lubrication device, and more specifically, to downsizing the engine in the vertical direction and lowering the center of gravity thereof to prevent air trapping in an oil pump. The present invention relates to an engine lubrication device.

(Prior Art) An oil pan for downsizing the engine in the vertical direction and for lowering the center of gravity is eliminated, and a mission chamber is provided in the rear of the crank chamber close to the crank chamber. A structure provided with an oil pump is provided in JP-A-61-175209 and JP-A-61-182408.

(Problems to be Solved by the Invention) However, in such a conventional technique, since the gears constituting the mission mechanism are immersed in the oil injected into the mission chamber, the oil is agitated by the gears and the air of the oil pump is agitated. There was a problem that biting was likely to occur.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide an engine lubrication device capable of downsizing the engine in the vertical direction and lowering the center of gravity, and preventing air trapping of an oil pump. There is.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the structure of the present invention is provided with a crank chamber 23 in which a crank shaft 41 is arranged in a horizontal direction, and is horizontal and orthogonal to the longitudinal direction of the crank shaft 41. To the side of the crank chamber 23 in the direction
Are arranged side by side, and side chambers 29 and 31 are provided on both sides of the crank chamber 23 in the longitudinal direction of the crankshaft 41, respectively, so that the lower portion of the mission chamber 25 and the upper portion of the oil reservoir chamber 27 communicate with each other. The upper part of 31 is placed in the crank chamber 23, and both side chambers 29,31
The lower part of each of these is communicated with the oil reservoir chamber 27, and an oil pump 107 for supplying the oil stored in the oil reservoir chamber 27 to an appropriate place is provided.

(Operation) The oil that lubricates the crank chamber 23 returns to the oil reservoir chamber 27 through the left and right side chambers 29 and 31, and the oil that lubricates the mission chamber 25 returns to the oil reservoir chamber 27 to lubricate the engine.

Therefore, the crankshaft 41 is set to a position lower than the conventional one with respect to the oil liquid level to make the engine compact in the vertical direction,
A low center of gravity can be achieved.

Further, the oil can be stored in the oil storage chamber 27 without stirring the oil, and the air trapping of the oil pump 107 can be prevented.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional side view of an essential part of the engine, and FIG. 2 is a development view of a crank chamber, a transmission chamber and an oil reservoir chamber.

1 is a 4-cycle 2-cylinder V-type engine, and the front and rear cylinders 3,
Reference numeral 3 denotes a cylinder member 5, a cylinder head 7, a head cover 9 and the like, and 11 in FIG. 1 denotes a valve operating mechanism.

The front and rear cylinder members 5 are attached to the front of the crankcase 13.

The crankcase 13 is composed of left and right split bodies 15 and 17.

3 and 4 are views of the left divided body as seen from the arrows III and IV of FIG. 2, respectively, and FIGS. 5 and 6 are V of FIG. 2, respectively.
The figure of the right division object seen from the arrow and VI arrow is shown.

Side covers 19 and 2 are provided on the left and right sides of the crankcase 13, respectively.
Put on 1.

A crank chamber 23 is provided at the front portion of the crankcase 13 so as to communicate with the inside of the cylinder member 5, and a transmission chamber 25 and an oil storage chamber 27 are provided at the rear portion of the crankcase 23 vertically behind each other.

Furthermore, the left side cover 19 and the left split body 15 allow the crank chamber
The left side chamber 29 is provided on the left side of 23, and the right side cover 21
The right chamber 31 is provided on the right side of the right divided body 17 by the right divided body 17.

It should be noted that in FIGS. 3 and 5, the slanted lines 33 and 35 are the divided bodies 1 respectively.
The mating surface between 5 and 17 is shown, and the diagonal lines are shown in Figs.
Reference numerals 37 and 39 denote mating surfaces with the side covers 19 and 21, respectively.
In the drawings and FIG. 5, reference numeral 40 denotes a breather chamber.

A crankshaft 41 is installed horizontally in the crank chamber 23,
A mission mechanism 43 is arranged at 25.

The crankshaft 41 is supported by the bearings of the left and right split bodies 15 and 17.
Support through 5.

The left end of the crankshaft 41 is projected into the left side chamber 29, and the sprocket 47 and the generator 49 are arranged in this portion.

The right end of the crankshaft 41 is projected into the right side chamber 31, and gears 51, 53, 55 are arranged in this portion.

The left and right split bodies 15 and 17 face the lower outer circumferences of the sprocket 47 and the gear 51, and as shown in FIG. 4 and FIG.
Partition walls 61 and 63 that project parallel to 7,59 and project a required height are formed to extend a required length in the circumferential direction of the sprocket 47 and the gear 51, respectively.

The mission mechanism 43 includes a main shaft 65, a counter shaft 67, a clutch 69 and the like.

Main shaft 65 and counter shaft 67 are in the mission room
A gear mechanism 71 is arranged on the main shaft 65 and the counter shaft 67.

The right end of the main shaft 65 is projected into the right side chamber 31, and a clutch 69 in which the gear 53 is meshed with the gear 73 is arranged in the portion, and the clutch 69 is mounted on the right side cover 21 and the right side cover 21. Cover with the covered lid 75.

The counter shaft 67 has its left end projected to the outside of the left divided body 15, and a sprocket 77 for taking out the output is attached to this portion. The right end of the counter shaft 67 is projected into the right side chamber 31, and a gear 79 connected to the kick gear is attached to this part.

Engine power is from crankshaft 41 to gears 53 and 73, clutch 6
9, main shaft 65, gear mechanism 71, counter shaft 6
7 is transmitted to the sprocket 77 and the gears of the gear mechanism 71 are switched by the shift of the shaft drum 81 by the shifters 83, 85.
By moving.

The oil reservoir chamber 27 and the mission chamber 25 are divided into left and right divided bodies 15,1.
It is partitioned by partition walls 87, 89 that bulge from 7 to the mating surfaces 33, 35, and a gap 91 is provided between the tips of the left and right partition walls 87, 87 so that the oil from the mission chamber 25 returns to the oil reservoir chamber 27. Formed,
The oil reservoir chamber 27 and the mission chamber 25 communicate with each other.

An open cylindrical concave portion 95 is formed on the bottom wall 93 side in the wall portion of the right split body 17 in the oil reservoir 27, and the oil filter screen 97 is housed in the concave portion 95 to define the concave portion 95. A collar portion 99 is formed at the lower part of the portion.

A cylindrical body 103 having a passage 101 communicating with the inside of the recess 95 is projected above the recess 95 toward the mating surface 35.

107 is an oil pump. The oil pump 107 is provided with its suction port and discharge port connected to the passage 101, respectively.
Is attached to the lower portion of the wall portion 106 that separates the oil reservoir chamber 27 and the right side chamber 31.

A recess 105 is formed in the left divided body 15 so as to bulge toward the oil reservoir 27, and a passage 10 communicating with the recess 105 is formed above the recess 105.
The cylindrical body 111 having 9 is projected toward the mating surface 33 side. This passage
109 is connected to the passage 101, and the oil filter element 108 is attached to the recess 105.

Then, the oil sucked through the oil filter screen 97 is passed through the oil pump 107 to the passages 101, 10
9. The oil filter element 108 and the passage 110 are used to supply the oil to an appropriate place.

The upper portion of the crank chamber 23 and the left chamber 29 are communicated with each other by two upper holes 113, 113 as shown in FIGS. 3 and 4, and the lower portion of the left chamber 29 and the oil reservoir chamber 27 are communicated with each other by the lower hole 115. Let

The upper portion of the crank chamber 23 and the right chamber 31 communicate with each other through three upper holes 117, 117 and 119 as shown in FIGS. 5 and 6, and the lower portion of the right chamber 31 communicates with the oil reservoir chamber 27 through a lower hole 121. Let

The upper holes 113, 117, 119 and the lower holes 115, 121 are integrally formed when the divided bodies 15, 17 are cast.

The oil is injected into the oil reservoir chamber 27, flows out to the left and right side chambers 29 and 31 through the left and right lower holes 115 and 121, and is injected to a height where the left and right lower holes 115 and 121 are located below the oil level.

Next, the operation will be described.

When the engine is driven, the oil pump 107 operates to supply oil to appropriate places.

The oil that lubricates the large end portion, the small end portion, the piston 133, and the journal portion of the connecting rod 131 in the crank chamber 23 reaches the left and right side chambers 29, 31 through the upper holes 113, 117, 119, and the lower holes from the left and right side chambers 29, 31. It returns to the oil reservoir 27 through 115 and 121.

In this case, the oil in the crank chamber 23 is atomized by the stirring of the crankshaft 41 and the like, and does not stay in the crank chamber 23 due to the flow of blow-by gas, and the upper holes 113, 117 on the left and right,
From 119, it flows into the left and right side chambers 29 and 31.

Further, the oil that lubricates the gear mechanism 71 and the like of the mission chamber 25 returns to the oil reservoir chamber 27 from the gap 91.

Therefore, according to the present embodiment, the crankshaft 41 can be set at a position lower than that of the conventional one with respect to the oil level, and the vertical size of the engine and the center of gravity can be reduced.

Further, oil can be stored in the oil reservoir chamber 27 without any stirring, and air trapping of the oil pump 107 can be prevented.

Further, in the embodiment, each of the left and right side chambers 29, 31 has a divided body 15,
Since the partition walls 61, 63 are formed to project from the 17 side, the left and right side chambers 29,
It is possible to prevent the oil from being agitated in the inside 31, and it is possible to more effectively prevent the air trapping of the oil pump 107.

(Effects of the Invention) As is apparent from the above description, according to the present invention, it is possible to obtain an engine lubrication device that can achieve compactness in the vertical direction of the engine and a low center of gravity, and can prevent air trapping of the oil pump. it can.

[Brief description of drawings]

FIG. 1 is a side view of a cross section of an essential part of an engine, FIG. 2 is a development view of a crank chamber, a transmission chamber, and an oil reservoir chamber, and FIGS. 3 and 4 are III arrow and IV arrow of FIG. 2, respectively. FIG. 5 and FIG. 6 are views of the left divided body as seen from FIG.
It is a figure of the right division object seen from an arrow. In the figure, 23 is a crank chamber, 25 is a mission chamber, 27 is an oil reservoir chamber, 29 and 31 are side chambers, and 107 is an oil pump.

Claims (1)

[Claims] 1. A crank chamber in which a crank shaft is arranged in a horizontal direction is provided, and a mission chamber and an oil sump chamber are vertically arranged side by side in the horizontal direction and in a direction orthogonal to the longitudinal direction of the crank shaft. Side chambers are provided on both sides of the crank chamber in the longitudinal direction of the crankshaft.The lower part of the transmission chamber and the upper part of the oil reservoir communicate with each other. An engine lubrication device, characterized in that an oil pump is provided which communicates with the respective chambers and supplies the oil stored in the oil storage chamber to an appropriate location.