JP7310845B2 - Oil storage structure and baffle plate - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to an oil storage structure and a baffle plate, and more particularly to techniques suitable for storing engine oil.

Generally, an oil pan that stores engine oil is provided in the lower part of the engine. Engine oil in the oil pan is pumped up by an oil pump, supplied to each lubricating element, and then returned to the oil pan for circulation (see Patent Documents 1 and 2, for example).

JP 2011-185121 A JP 2011-179482 A

An oil strainer is immersed in the engine oil in the oil pan as a filter for removing foreign matter from the engine oil pumped up by the oil pump. When the engine oil around the oil strainer moves forward from the oil pan during braking of the vehicle or the like, the intake port of the oil strainer is exposed to the air, and air may be sucked in from the intake port.

The technology of the present disclosure has been made in view of the above circumstances, and aims to prevent air from being sucked from the oil strainer by effectively holding the oil around the oil strainer in the oil pan. .

The technology of the present disclosure includes a case that is formed in the shape of a box with a bottom and has a first bottom portion on one end side in the longitudinal direction and a second bottom portion on the other end side; an oil pan provided so as to block from and store oil, an oil strainer immersed in the oil in the oil pan, and extending upward from between the first bottom and the second bottom, and and a baffle plate that extends in a width direction orthogonal to and divides the space in the case into the first bottom side and the second bottom side.

Moreover, it is preferable that the baffle plate further includes a bent portion that bends the upper end of the baffle plate toward the oil strainer.

The second bottom portion is formed longer in the width direction than the first bottom portion. More preferably, a flange portion is provided that forms a crank by facing the side wall of the portion that protrudes in the width direction with a predetermined gap.

The second bottom portion is formed lower than the first bottom portion, and both end portions of the baffle plate are provided with inclined portions projecting obliquely toward the second bottom portion. It is preferable that the portion is provided with a flap that closes a gap between the lower end of the inclined portion and the first bottom portion.

According to the technology of the present disclosure, it is possible to prevent the intake of air from the oil strainer by effectively retaining the oil around the oil strainer in the oil pan.

1 is a schematic longitudinal sectional view showing a lower structure of an engine having an oil storage structure according to this embodiment; FIG. FIG. 2 is a schematic plan view of the oil storage structure according to the present embodiment viewed from above; 1 is a schematic perspective view showing an oil storage structure according to this embodiment; FIG.

An oil storage structure and a baffle plate according to this embodiment will be described below with reference to the accompanying drawings. The same parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[overall structure]
FIG. 1 is a schematic longitudinal sectional view showing the lower structure of an engine 10 having an oil storage structure according to this embodiment.

As shown in FIG. 1 , the lower structure of engine 10 mainly includes crankcase 11 (the case of the present disclosure) and oil pan 20 . A cylinder block (not shown) is provided above the crankcase 11, and a cylinder head (not shown) is provided above the cylinder block.

In this embodiment, the engine 10 is configured such that one longitudinal end of the crankcase 11 (left side in FIG. 1) is the front side, and the other longitudinal end side of the crankcase 11 (right side in FIG. 1) is the rear side. mounted on the vehicle. In the following description, the direction perpendicular to the longitudinal direction of the crankcase 11 is simply referred to as the width direction.

The crankcase 11 is formed so that the first bottom portion 11A on one end side is higher than the second bottom portion 11B on the other end side, in other words, the second bottom portion 11B is lower than the first bottom portion 11A. A step surface portion 11C is provided between the bottom portions 11A and 11B. A substantially rectangular opening 12 is provided in the second bottom portion 11B of the crankcase 11 .

The oil pan 20 is formed in the shape of a container with a concave cross-section that opens upward, and is attached with a bolt or the like (not shown) so as to block the opening 12 provided in the second bottom portion 11B of the crankcase 11 from below. there is Engine oil is stored in the oil pan 20, and an oil strainer 22 is immersed in the engine oil for removing foreign matter from the engine oil pumped up by an oil pump (not shown).

In this embodiment, a baffle plate 30 is provided between the first bottom portion 11A and the second bottom portion 11B of the crankcase 11 to divide the space inside the crankcase 11 into the first bottom portion 11A side and the second bottom portion 11B side. It is This baffle plate 30 is designed to restrict engine oil in the oil pan 20 from moving from the second bottom portion 11B side (oil pan 20 side) to the first bottom portion 11A side (front side) when the vehicle suddenly brakes. function. Details of the baffle plate 30 will be described below.

[Baffle plate]
FIG. 2 is a schematic plan view of the oil storage structure according to this embodiment viewed from above, and FIG. 3 is a schematic perspective view showing the oil storage structure according to this embodiment. 3, the crankcase 11 and the oil pan 20 are partially cut away, and the illustration of the oil strainer 22 is omitted.

As shown in FIGS. 2 and 3, the second bottom portion 11B of the crankcase 11 is formed longer in the width direction than the first bottom portion 11A, and between them, from each end of the stepped surface portion 11C in the width direction A pair of side wall surface portions 11D and 11E are provided.

The baffle plate 30 extends upward from the upper edge of the stepped surface portion 11C, and protrudes toward the second bottom portion 11B from the main plate portion 31 extending in the width direction of the crankcase 11 and the end portion of the main plate portion 31 in the width direction. It has a pair of inclined plate portions 32 and 33 extending obliquely as shown in FIG. That is, about half of the circumference of the oil strainer 22 facing the stepped surface portion 11C is surrounded by the main plate portion 31 and the inclined plate portions 32 and 33 of the baffle plate 30 . By surrounding about half of the front side of the oil strainer 22 with the main plate portion 31 and the inclined plate portions 32 and 33 in this way, the engine oil around the oil strainer 22 flows from the second bottom portion 11B side when the vehicle is braked. Movement to the first bottom portion 11A side can be effectively suppressed.

The upper end of the main plate portion 31 and the upper end of each inclined plate portion 32 are provided with a bent portion 34 that bends the upper end toward the second bottom portion 11B where the oil strainer 22 is located. By providing such a bent portion 34, the upward flow of engine oil from the oil pan 20 side along the side surfaces of the stepped surface portion 11C and the baffle plate 30 can be blocked when the vehicle suddenly brakes. It is possible to reliably prevent engine oil from moving toward the first bottom portion 11A.

A pair of flaps 36, 37 (shown only in FIG. 2) extending toward the upper end of the step surface portion 11C are provided at the lower ends of the inclined plate portions 32, 33. As shown in FIG. The flaps 36, 37 are formed in a substantially triangular shape when viewed from above so as to close the gap between the lower ends of the inclined plate portions 32, 33 and the upper end of the step surface portion 11C. By providing such flaps 36 and 37 at both ends of the baffle plate 30, the upward engine oil from the oil pan 20 can flow out to the first bottom portion 11A side of the crankcase 11 through the gaps at both ends of the baffle plate 30. can be effectively prevented.

A pair of flange portions 38 and 39 extending in the width direction from the ends of the inclined plate portions 32 and 33 are respectively provided at the ends of the inclined plate portions 32 and 33 . Among the flange portions 38 and 39, the flange portion 38 extends in the width direction and faces the side wall portion 11D of the crankcase 11 with a predetermined gap therebetween, thereby forming a crank therebetween. By providing such a crank, the engine oil returned from each lubricating element of the engine 10 to the first bottom portion 11A of the crankcase 11 is rectified along the side surfaces of the inclined plate portions 32 and 33 and directed to the oil pan 20 side. While returning, it is possible to effectively prevent the engine oil in the oil pan 20 from flowing out to the first bottom portion 11A side. In the illustrated example, the flange portion 39 is folded back, but the orientation of each of the flange portions 38 and 39 can be appropriately set according to the layout of the surroundings.

Here, the position of the baffle plate 30 in the crankcase 11 may be appropriately set according to the specific specifications of the engine 10 or the like.

For example, if the baffle plate 30 is too close to the oil strainer 22, the oil storage space S defined by the baffle plate 30 and the oil pan 20 (see FIGS. 1 and 2) is narrowed, and the engine oil that can be retained around the oil strainer 22 is reduced. becomes less. In this case, in a situation such as when the vehicle is suddenly braked, it is difficult for the engine oil to flow from the first bottom portion 11A side of the crankcase 11 to the second bottom portion 11B (oil pan 22) side. If the oil continues to be supplied, the amount of engine oil around the oil strainer 22 is extremely reduced, and air may be sucked in from the oil strainer 22 .

On the other hand, if the baffle plate 30 is moved too far from the oil strainer 22, the oil storage space S defined by the baffle plate 30 and the oil pan 20 becomes wider. If the oil storage space S is wide, it becomes difficult to store a sufficient amount of engine oil around the oil strainer 22 , and as a result, air may be sucked from the oil strainer 22 .

From this point of view, it is preferable to provide the baffle plate 30 at a position where the oil storage space S defined by the baffle plate 30 and the oil pan 20 can always hold an appropriate amount of engine oil. Specifically, it is preferable to set a position where the engine oil can be reliably held and stored around the oil strainer 22 over a period from braking of the vehicle to stopping of the vehicle.

According to the present embodiment described in detail above, the space inside the crankcase 11 is divided into the first bottom portion 11A side and the second bottom portion 11B side between the first bottom portion 11A and the second bottom portion 11B of the crankcase 11. By providing the baffle plate 30, it becomes possible to effectively prevent engine oil from moving forward from around the oil strainer 22 arranged on the side of the second bottom part 11B when the vehicle is suddenly braked. As a result, the engine oil can be effectively retained around the oil strainer 22, and air intake from the oil strainer 22 can be reliably prevented.

In addition, by adopting a simple configuration in which the baffle plate 30 is attached to the crankcase 11, the oil storage space S defined by the baffle plate 30 and the oil pan 20 can be adjusted according to various specifications of the engine and the specific shape of the crankcase 11. Therefore, it becomes possible to effectively respond to design changes and specification changes.

[others]
It should be noted that the present disclosure is not limited to the above-described embodiments, and can be appropriately modified and implemented without departing from the gist of the present disclosure.

For example, in the above embodiment, the oil storage structure is described as an engine oil storage structure, but it can be widely applied to other oil storage structures such as transmissions, clutch devices, and differential gear devices. .

10 engine 11 crankcase (case)
11A first bottom portion 11B second bottom portion 12 opening 20 oil pan 22 oil strainer 30 baffle plate 31 main plate portion 32, 33 inclined plate portion 34 bent portion 36, 37 flap 38, 39 flange portion

Claims (4)

A case formed in the shape of a box with a bottom and having a first bottom at one end in the longitudinal direction and a second bottom at the other end in the longitudinal direction , wherein the second bottom is below the first bottom a case formed low on the
an oil pan provided to block an opening provided in the second bottom from below and storing oil;
an oil strainer immersed in the oil in the oil pan;
A baffle that extends upward from between the first bottom portion and the second bottom portion and extends in a width direction perpendicular to the longitudinal direction to divide the space in the case into the first bottom portion side and the second bottom portion side. a plate and
Both ends of the baffle plate are provided with inclined portions projecting obliquely toward the second bottom portion,
The inclined portion is provided with a flap that closes a gap between the lower end of the inclined portion and the first bottom portion.
An oil storage structure characterized by: 2. The oil storage structure according to claim 1, further comprising a bent portion formed by bending an upper end of said baffle plate toward said oil strainer. The second bottom is formed longer in the width direction than the first bottom,
Both ends of the baffle plate are provided with flanges,
2. The flange portion forms a crank by facing a portion of the side wall of the case in which the second bottom portion protrudes in the width direction beyond the first bottom portion with a predetermined gap therebetween. 3. or the oil storage structure according to 2. A baffle plate according to any one of claims 1 to 3 .

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