JP3055141B2 - engine - Google Patents

Description

The present invention relates to an engine provided with a partition plate inside an oil pan for storing lubricating oil.

[Conventional technology]

Some engines mounted on two-wheeled vehicles, four-wheeled vehicles and the like include a partition plate inside an oil pan for storing lubricating oil. The partition plate regulates the movement of the lubricating oil stored in the oil pan when the vehicle suddenly accelerates or decelerates as described above. The air is prevented from being sucked in from the suction port of the oil pump arranged in the oil pump.

Generally, the partition plate is formed by integrally forming a partition wall between the inner walls of the oil pan during casting of the oil pan, or by welding a support member to the inner wall surface of the oil pan, and further fixing the plate member to the support member. It is configured by installation.

[Problems to be solved by the invention]

By the way, in the former engine, that is, in the engine in which the partition plate is formed inside the oil pan by integrally molding the partition wall, it is necessary to perform processing such as cutting on the case mating surface after molding the oil pan. For this reason, the partition plate cannot be provided so as to protrude from the mating surface, and there is a possibility that the movement of the lubricating oil inside the oil pan cannot be sufficiently restricted.

On the other hand, in the latter engine, that is, in an engine in which a partition plate is formed inside an oil pan by fixing and installing a plate-shaped member, a support member must be prepared in addition to the plate-shaped member. Increased score is invited,
Furthermore, the supporting member must be welded to the oil pan, and the plate-like member must be held on the supporting member by using a required fixing means, so that the mounting operation is extremely complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine capable of reducing the number of parts and sufficiently restricting the movement of lubricating oil inside an oil pan in view of the above situation.

[Means for solving the problem]

According to the present invention, an oil pan in which lubricating oil is stored, an oil strainer disposed in the oil pan and sucking the stored lubricating oil, and an oil pan integrally formed in the oil pan, and having a substantially A pair of support members having a U-shape and held in a state of being bent between the pair of support members, and an upper edge thereof is bent toward the oil strainer, and A partition plate for restricting the movement of the lubricating oil is provided inside.

[Action]

According to the above configuration, since the partition plate and the oil pan are configured separately, the partition plate can be provided so as to protrude from the case mating surface of the oil pan.

Moreover, since the partition plate is held by bending between the support members formed integrally with the oil pan, it is not necessary to prepare special means for holding the partition plate.

Further, since the upper edge of the partition plate is bent toward the oil strainer, the movement of the lubricating oil can be surely restricted without causing a significant increase in the height.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings showing examples.

FIG. 1 and FIG. 2 conceptually show an oil pan applied to the engine according to the present invention. The oil pan 1 exemplified here is made of aluminum which is applied to a four-cycle engine for a motorcycle. After being formed by die casting, a required cutting process is performed on a mating surface 1a with a crankcase (not shown). As shown in FIG. 1, a discharge passage 2 communicating with an oil pump (not shown) is provided upright in the center of the inside thereof in a columnar shape. In addition,
Although not explicitly shown in the drawings, the engine to which the oil pan 1 is applied is mounted on a motorcycle in a state where an upper portion in FIG. 1 is directed forward in the vehicle traveling direction.
A large-diameter circle 3 indicated by a two-dot chain line in FIG. 1 is inside the oil pan 1 of the oil strainer 4 (shown in FIG. 2) connected to the suction port of the oil pump (not shown). The arrangement position is shown, and the small-diameter circle 5 indicates the position of the suction port 4 a in the oil strainer 4.

On the other hand, as shown in FIG. 1, two pairs of support members 6, 6, and 7, 7 are integrally formed with the oil pan 1 on the inner side surface of the oil pan 1. These support members
6, 6 and 7, 7 have the same U-shaped cross section, include the above-described oil pump discharge passage 2 (not shown), and divide the inside of the oil pan 1 into two front and rear parts. On a straight line,
Openings 6a, 6a between pairs of members 6, 6, and openings 7 between members 7, 7
a, 7a are arranged so as to face each other.

The oil pan 1 has partition plates 8 and 9 therein. The partition plates 8 and 9 are formed of an elastic plate material, and as shown in FIG. 2, the front end portions 8a and 9a are bent at a right angle, and the substrate portions 8b and 9b advance in the extending direction. It has a wave shape. In addition, these board parts 8b, 9b
The height h of the wave at
It is formed larger than the width w of a and 7a. Also, the board part
8b and 9b are configured to have a sufficient height than the support members 6 and 7.

These partition plates 8 and 9 have their tip portions 8a and 9a facing the oil strainer 4 side, and the respective board portions 8b and 9
Opening sides 6a, 6a of the supporting members 6, 6, and 7, 7
The oil pan 1 is attached to the inside of the oil pan 1 by pressing into the openings 6a, 6a and 7a, 7a from the state where the oil pan is located at 7a, 7a. At that time, the partition plates 8 and 9 are bent by the corrugated peak portions of the substrate portions 8b and 9b slidingly contacting the inner walls of the openings 6a and 7a of the support members 6 and 7, and the elastic restoring force causes these substrate portions to be bent. The corrugated peak portions of the portions 8b, 9b and the inner walls of the openings 6a, 7a of the support members 6, 7 are held to such a degree that they do not fall off due to pressure contact with each other.

The partition plates 8 and 9 in this state are arranged so as to protrude from the mating surface 1a, and divide the inside of the oil pan 1 into a front portion F and a rear portion R, as is apparent from the drawing. . Although not shown in the figure, the front part F and the rear part R of the oil pan 1 bisected by the partition plates 8 and 9 communicate with each other through a small-diameter communication passage.
Reference numeral 10 in FIG. 2 indicates a drain bolt for opening and closing the drain hole 11.

The oil pan 1 configured as described above has a mating surface
It is attached to the bottom surface of a crankcase (not shown) via 1a, and lubricating oil O is stored therein. At this time, the oil level L of the lubricating oil O depends on the front part F and the rear part R.
Are communicated with each other via a communication passage (not shown), so that they are horizontal at the same height.

When the above-described oil pump (not shown) is driven, the lubricating oil O in the oil pan 1 is sucked through the suction port 4a of the oil strainer 4 and supplied to each part of the engine via a passage (not shown). .

The lubricating oil O supplied to each part of the engine is lubricated and cooled there, and then returned to the oil pan 1 again through a passage (not shown).

When acceleration is applied to the engine during the circulation of the lubricating oil O, for example, when the engine is suddenly decelerated, in a conventional general engine, the lubricating oil O stored inside the oil pan 1 is moved by inertia, and the oil O is moved. The surface is a one-dot chain line in FIG.
It is tilted as indicated by L _1.

In this state, only air is sucked from the suction port 4a of the oil strainer 4, and a decrease in oil pressure in each part of the engine is caused.

However, in the engine to which the oil pan 1 is applied, even when the engine is rapidly decelerated, the movement of the lubricating oil O is restricted by the partition plates 8 and 9 (in this case, since the movement of the lubricating oil O is sharp, The lubricating oil O is not circulated through the small-diameter communication passage.)
As indicated by L ₂ and L ₃ , the oil pan 1 is separately inclined at the front part F and the rear part R of the oil pan 1 divided by the partition plates 8 and 9.

In this state, the suction port 4a of the oil strainer 4 stops in the lubricating oil O, so that only air is not supplied to each part of the engine.

Moreover, according to the engine described above, the leading end 8
Since each of a and 9a is bent toward the oil strainer 4, the movement of the lubricating oil O can be reliably restricted without causing a significant increase in the height.

FIG. 3 and FIG. 4 conceptually show a modified example of the oil pan applied to the engine according to the present invention. The oil pan 21 exemplified here is the oil pan 21 shown in FIGS.
The oil pan 1 shown in the drawing differs from the oil pan 1 only in the configuration of the partition plates 22 and 23 and the mounting structure thereof, and the same components as those in the above-described embodiment are denoted by the same reference numerals.

In this oil pan 21, as shown in FIG. 3, two sets of support members 2 forming a pair integrally formed with the oil pan 21.
Column members 26 and 27 are erected between 4, 24 and 25, 25, respectively. The columnar members 26 and 27 are, respectively, the support members 24 and
24 connecting the openings 24a, 24a and the openings 25 of the support members 25, 25
It is arranged at a position where it intersects with the line connecting a and 25a, and is formed integrally with the oil pan 21 like the support members 24, 24 and 25, 25. As is clear from FIG. 4, these columnar members 26 and 27 have a tapered shape in which their free ends decrease in diameter upward (upward in FIG. 4).

On the other hand, the partition plates 22 and 23 used for the oil pan 21
Is formed of an elastic plate material,
22a, 23a and the substrate parts 22b, 23b are substantially L-shaped and connected to each other at right angles. Note that the substrate portions 22b and 23b are configured to have a sufficient height than the support members 24 and 25.

These partition plates 22 and 23 have their respective tips 22a and 23a facing the oil strainer 4 side and
22b, 23b, the supporting members 24, 24 and 25, 25
By being pressed into the openings 24a, 24a and 25a, 25a from the state of being located at the openings 24a, 24a and 25a, 25a, the oil pan 21 is mounted inside the oil pan 21. At that time, partition plate 2
As shown in FIG. 3, the base members 22b and 23b are bent by sliding contact with the column members 26 and 27, and the base members 22b and 23b and the support members 24 and 23 are elastically restored by the elastic restoring force. The inner walls of the 25 openings 24a, 25a and the columnar members 26, 27 are held to such an extent that they do not fall off by being pressed against each other.

As is clear from FIG. 4, the partition plates 22 and 23 in this state are mated with a crankcase (not shown).
The oil pan 21 is arranged so as to protrude from the oil pan 21a.
Is divided into a front part F 'and a rear part R'. Although not shown in the drawing, the front part F 'and the rear part R' of the oil pan 21 divided by the partition plates 22 and 23 are connected to each other by a small-diameter communication passage.

In the engine to which the oil pan 21 is applied, similarly to the engine shown in FIGS. 1 and 2, when the engine is rapidly decelerated, the movement of the lubricating oil O is restricted by the partition plates 22 and 23. Therefore, as shown by the two-dot chain lines L' ₂ and L' ₃ in FIG. 4, the oil level L 'is divided into the front part F' and the rear part R of the oil pan 21 divided by the partition plates 22 and 23. ′ And the air is not supplied only to each part of the engine.

In addition, according to the engine, since the end portions 22a and 23a of the partition plates 22 and 23 are bent toward the oil strainer 4, respectively, the movement of the lubricating oil O can be prevented without significantly increasing the other features. Can be reliably regulated.

In the above embodiment and the modified example, the two partition plates 8,
Although the inside of the oil pans 1, 21 is divided into two parts by 9 and 22, 23, in the present invention, one or three or more partition plates may be provided, May be divided. Further, a four-cycle engine using the oil pans 1, 21 formed by aluminum die casting is illustrated, but other types may be used.

Further, in the embodiment shown in FIGS. 1 and 2, the board portions 8b and 9b of the partition plates 8 and 9 are formed in a wavy shape traveling in the extending direction. Other shapes may be used as long as they are bent when pressed into the openings 6a, 7a and hold the partition plates 8, 9 in the oil pan 1.

Further, in the modification shown in FIGS. 3 and 4,
Although one columnar member 26, 27 having a tapered distal end is provided at each corresponding location, a plurality of columnar members having a non-tapered distal end may be provided at the corresponding location.

〔The invention's effect〕

As described above, according to the engine of the present invention, since the partition plate and the oil pan are configured separately, the partition plate can be provided so as to protrude from the case mating surface of the oil pan, The movement of the lubricating oil inside the oil pan can be sufficiently restricted.

In addition, since the partition plate is held by bending between the support members formed integrally with the oil pan, there is no need to prepare special means for holding the partition plate,
The mounting operation can be facilitated, and the number of parts can be reduced.

Further, since the upper edge of the partition plate is bent toward the oil strainer, the movement of the lubricating oil can be surely restricted without causing a significant increase in the height.

[Brief description of the drawings]

FIG. 1 is a top view conceptually showing an oil pan applied to the engine according to the present invention, FIG. 2 is a sectional view conceptually showing an oil pan applied to the engine according to the present invention, FIG. 3 is a top view conceptually showing a modified example of the oil pan applied to the engine according to the present invention, and FIG. 4 is a conceptual diagram showing a modified example of the oil pan applied to the engine according to the present invention. It is sectional drawing shown in FIG. 1,21 …… oil pan, 4 …… oil strainer, 6,7,2
4,25 ... Support member, 8,9,22,23 ... Partition plate, 8a, 9a, 22a, 2
3a: bent end portions 8a, 9a of partition plate, O: lubricating oil.

Claims (1)

(57) [Claims] 1. An oil pan in which lubricating oil is stored, an oil strainer disposed in the oil pan and sucking the stored lubricating oil, and an oil pan integrally formed in the oil pan and having a cross-section. A pair of substantially U-shaped support members, held between the pair of support members in a bent state, and an upper edge thereof is bent toward the oil strainer; A partition plate for restricting movement of lubricating oil inside the engine.