JP3406810B2 - Oil pan - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pan for storing lubricating oil to be supplied to a movable portion of an engine. 2. Description of the Related Art At the bottom of an engine mounted on a vehicle,
An oil pan is provided so as to supply the lubricating oil to the movable part of the engine and store the lubricating oil returned from the lubricating part of the engine. An example of such an oil pan is shown in FIG. [0003] The oil pan 1 shown in FIG.
From the engine front side F to the engine rear side B with respect to the horizontal plane S
Engine mounting angle θ1 (4 ゜ to 7 ゜) with a downward slope toward
Shallow plate which is installed at the lower part of the engine 2 and has a bottom surface 3a formed at a slightly steep downward slope at the same angle as the engine mounting angle θ1 from the engine front side F toward the engine rear side B. A portion 3, which is provided on the engine rear side B with respect to the shallow plate portion 3, has a greater depth than the shallow plate portion 3, and is substantially parallel to the bottom surface 3 a of the shallow plate portion 3 from the engine front side F to the engine rear side. B having a bottom surface 4a inclined toward B, and a vertical plate 4 having a vertical wall 4b rising upward from the bottom surface 4a on the front side F of the engine.
The transition from the deep dish portion 4 to the deep dish portion 4 is a stepped shape in which the bottom surface 3a of the shallow dish portion 3 and the upper end 9 of the vertical wall 4b of the deep dish portion 4 are connected and descend from the shallow dish portion 3 to the deep dish portion 4 Is formed. The engine rear side B is the output side of the crankshaft shaft, the engine front side F is the opposite side of the engine rear side B, and the engine mounting angle θ1 is , The inclination angle of the axis of the crankshaft inside the engine 2 with respect to the horizontal plane S. [0005] A strainer 5 whose lower end is located slightly above the bottom surface 4 a is disposed in the deep dish portion 4, and lubricating oil sucked from the strainer 5 by the oil pump 6 and drawn into the suction pipe 7 is provided. 8 is pressurized by an oil pump 6 and supplied to each lubricating portion of the engine 2. [0006] A drain plug 11 for removing the lubricating oil 8 accumulated in the deep dish portion 4 is attached to the bottom end portion of the bottom surface 4 a of the deep dish portion 4. The lubricating oil 8 is stored below the upper end 9 of the lubrication oil. During the operation of the engine 2, the lubricating oil 8 stored in the deep dish portion 4 filters impurities from the strainer 5 through a suction pipe 7 by an oil pump 6 driven by a part of the power of the engine 2. While being sucked up,
The lubricating oil 8 pressurized by the oil pump 6 and sent to each lubricating part of the engine 2, and lubricated each lubricating part,
The oil drops and falls into the shallow plate portion 3 and the deep plate portion 4 of the oil pan 1 below the engine 2, and the lubricating oil 8 flowing into the shallow plate portion 3 immediately transmits the lubricating oil 8 to the shallow plate portion 3. Bottom 3
The lubricating oil 8 that automatically flows into the deep dish portion 4 along the line a and is stored in the deep dish portion 4 is again sucked up by the oil pump 6 and circulates in the engine 2. However, when the vehicle starts or stops suddenly, the lubricating oil 8 stored in the oil pan 1
A large amount of shallow dish 3 reciprocates in the vehicle front-rear direction due to inertia.
As a result, the oil level of the deep dish portion 4 descends and the suction port of the strainer 5 comes into contact with the air, so that the air is sucked into the oil pump 6 from the strainer 5 and, therefore, the lubricating oil 8 is reliably circulated. Could not be performed. For this reason, the oil pan 1 in which the oil pump 6 reliably sucks the lubricating oil 8 circulated to the engine even when the vehicle suddenly starts or stops suddenly has been used, and an example thereof is shown in FIG. ing. Thus, the oil pan 1 shown in FIG.
The engine has a bottom surface 3a formed at the same angle as the engine mounting angle θ1 from the engine front side F toward the engine rear side B at the same angle as the engine mounting angle θ1, and a vertical wall 3b protruding upward from the bottom surface 3a at the engine rear side B. A shallow plate portion 3 having a relatively shallow depth, and a bottom surface 3 of the shallow plate portion 3 which is provided on the engine rear side B with respect to the shallow plate portion 3 and has a greater depth than the shallow plate portion 3.
a deep plate portion 4 having a bottom surface 4a which is inclined in parallel from the engine front side F toward the engine rear side B in parallel to the bottom surface 4a and has a vertical wall 4b rising upward from the bottom surface 4a at the engine front side F. The transition from the plate portion 3 to the deep plate portion 4 is formed in a mountain shape with the upper ends of the vertical walls 3b and 4b integrally connected to each other and the upper end 9 as a top. A drain for draining the lubricating oil 8 accumulated in the shallow dish portion 3 and the deep dish portion 4 is provided at the lowermost position of the bottom surface 3a in the shallow dish portion 3 and the lowermost position of the bottom surface 4a in the deep dish portion 4. Plugs 10 and 11 are respectively attached. The lubricating oil 8 is stored in the shallow dish portion 3 to a height substantially coincident with the upper end 9 of the vertical wall 4b.
The lubricating oil 8 is stored below the upper end 9 of the vertical wall 4b. When the vehicle suddenly starts or stops, the lubricating oil 8 stored in the oil pan 1 reciprocates in the longitudinal direction of the vehicle due to inertia. The vertical wall 4b
Is prevented from flowing into the shallow plate portion 3 in a large amount, so that the oil level of the deep plate portion 4 descends and the suction port of the strainer 5 comes into contact with air, and the oil pump 6
Air is not sucked into the lubricating oil 8
Can be surely circulated. However, in the conventional oil pan 1 shown in FIG. 3, the drain pan 11 for discharging the lubricating oil 8 accumulated in the deep dish 4 is provided in the shallow dish 3. In order to discharge the accumulated lubricating oil 8, the shallow plate 3
Also, since the drain plug 10 needs to be provided, there is a problem that extra parts are required and the cost is increased. The present invention has been made in view of the above-described circumstances, and enables the oil pump to reliably suck the lubricating oil circulated to the engine even when the vehicle is suddenly started or suddenly stopped, and has an extra drain plug in the shallow plate portion. It is an object of the present invention to provide an oil pan that can reduce the cost and reduce the cost. [0016] The oil pan of the present invention comprises:
An oil pan installed at a lower portion of an engine having an engine mounting angle that is inclined downward with respect to a horizontal plane from an engine front side to an engine rear side, wherein the oil pan moves from the engine front side to the engine rear side. A shallow plate portion having a bottom surface formed on a downward slope with respect to a horizontal plane,
A deep plate portion provided on the engine rear side of the shallow plate portion and having a depth greater than that of the shallow plate portion; a transition portion from the shallow plate portion to the deep plate portion includes a bottom surface of the shallow plate portion and a deep plate; The upper end of the vertical wall of the part is connected and formed in a step shape descending from the shallow dish side to the deep dish part, and the height of the upper end of the vertical wall with respect to the bottom face of the deep dish part is deep.
This prevents the lubricating oil in the pan from flowing into the shallow pan.
Cormorant larger is formed, the inclined angle of the bottom surface of the shallow dish portion, zero or more down the line that is inclined in the same angle as the engine mounting angle through the vicinity of the upper end of the vertical wall of the deep dish portion as a reference, an engine mounted angle and it is formed smaller than. When the vehicle suddenly starts or stops, even if the lubricating oil stored in the deep dish tends to move in the longitudinal direction of the vehicle, the lubricating oil is blocked by the vertical wall and flows into the shallow dish in large quantities. This is prevented, and when the lubricating oil flows into the shallow dish portion, the lubricating oil automatically flows into the deep dish portion immediately along the bottom surface of the shallow dish portion. Therefore, since the suction port of the strainer does not come into contact with air and air is sucked into the oil pump, the oil pump can reliably circulate the lubricating oil, and furthermore, the excess oil in the shallow plate portion can be obtained. Since there is no need to provide a drain plug, cost can be reduced. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an oil pan, in which parts denoted by the same reference numerals as those in FIGS. 2 and 3 represent the same parts. Thus, the oil pan 1 shown in FIG.
The vertical wall 3b of the shallow plate portion 3 shown in FIG. 3 is removed. That is, the oil pan 1 has a shallow plate portion 3 having a bottom surface 3a formed to be inclined downward from the horizontal plane S from the front side F of the engine toward the rear side B of the engine. A deep plate portion 4 provided on the side B and having a greater depth than the shallow plate portion 3 is provided.
The transition portion to the bottom plate 3a of the shallow plate portion 3 and the vertical wall 4 of the deep plate portion 4
b is connected to the upper end 9 and is formed in a stepped shape descending from the shallow dish portion 3 side to the deep dish portion 4 side, and the inclination angle θ2 of the bottom surface 3a of the shallow dish portion 3 is the vertical wall 4b of the deep dish portion 4 With reference to a line L inclined at the same angle as the engine mounting angle θ1 passing through the vicinity of the upper end 9, the angle is zero or more downward from the line L and smaller than the engine mounting angle θ1 (θ1> θ2 ≧ 0). The height H3 of the vertical wall 4b of the deep pan 4 is the same as the height H1 of the vertical wall 4b of the deep pan 4 of the oil pan 1 shown in FIG.
(H3> H1). Further, the deep plate portion 4 has a shape which is moved downward by the height of the vertical wall 3b of the shallow plate portion 3, and
The height H4 from the bottom surface 3a to the bottom surface 4a of the deep dish portion 4 is
The height from the bottom surface 3a of the shallow plate portion 3 of the oil pan 1 to the bottom surface 4a of the deep plate portion 4 shown in FIG. 3 is larger than H2 (H4> H2). The lubricating oil 8 is large enough to store the lubricating oil 8. At the lowermost position of the bottom surface 3a of the shallow plate 3,
The drain plug 10 attached at the lowermost end position of the bottom surface 3a of the shallow plate portion 3 shown in FIG. 3 is not provided, but is stored in the deep plate portion 4 only at the lowermost position of the bottom surface of the deep plate portion 4. A drain plug 11 for draining oil is attached. The operation of the embodiment of the present invention will be described below. When the vehicle starts or stops suddenly, the deep plate 4
Even if the lubricating oil 8 stored in the tank reciprocates in the vehicle longitudinal direction due to inertia and tries to flow into the shallow plate portion 3,
The lubricating oil 8 is applied to the vertical wall 4b in the same manner as the
Is prevented from flowing into the shallow dish 3 in large quantities,
Further, when the lubricating oil 8 cannot be prevented by the vertical wall 4b and moves to the shallow plate portion 3 side, or the oil droplets of the lubricating oil 8 that has fallen from the engine 2 side and returned have excessively flowed into the shallow plate portion 3. In this case, the lubricating oil 8 automatically flows into the deep dish portion 4 immediately along the bottom surface 3a of the shallow dish portion 3 and does not accumulate in the shallow dish portion 3 side. , The air is not sucked into the oil pump 6, so that the oil pump 6 can reliably circulate the lubricating oil 8, and it is necessary to provide an extra drain plug 10 in the shallow dish portion 3. Since it is not provided, the cost can be reduced. It should be noted that the present invention is not limited to only the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention. According to the oil pan of the present invention, air is not sucked into the oil pump even when the vehicle suddenly starts or stops, and the oil pump reliably circulates lubricating oil. This can be performed, and there is no need to provide an extra drain plug in the shallow plate portion, so that an excellent effect that cost can be reduced can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cut-away side view showing an embodiment of an oil pan of the present invention. FIG. 2 is a cut-away side view showing an example of a conventional oil pan. FIG. 3 is a cut-away side view showing another example of a conventional oil pan. [Description of Signs] 1 Oil pan 2 Engine 3 Shallow plate portion 3a Bottom surface 3b Vertical wall 4 Deep plate portion 4a Bottom surface 4b Vertical wall 9 Upper end B Engine rear side F Engine front side L Line inclined at the same angle as the engine mounting angle S Horizontal plane θ1 Engine mounting angle θ2 Tilt angle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-82166 (JP, A) JP-A-63-154845 (JP, A) JP-A 5-87235 (JP, U) JP-A 6-154 83927 (JP, U) Japanese Utility Model Hei 7-38649 (JP, U) Japanese Utility Model Utility Model 55-144832 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02F 7/00 F01M 11 / 00

Claims (1)

(1) An oil pan installed at a lower portion of an engine having an engine mounting angle that is inclined downward from a horizontal plane from a front side of the engine toward a rear side of the engine.
The oil pan is provided with a shallow plate portion having a bottom surface formed at a downward slope with respect to a horizontal plane from the engine front side to the engine rear side, and provided on the engine rear side of the shallow plate portion and higher than the shallow plate portion. A transition portion from the shallow dish portion to the deep dish portion is provided, and a bottom portion of the shallow dish portion and an upper end of a vertical wall of the deep dish portion are connected to each other. It is formed in a step shape descending to the side, and the upper end of the vertical wall with respect to the bottom surface of the deep dish portion
The height is such that the lubricating oil in the deep dish flows into the shallow dish.
In larger is formed so as to prevent the inclination angle of the bottom surface of said shallow dish portion, zero or more down the line that is inclined in the same angle as the engine mounting angle through the vicinity of the upper end of the vertical wall of the deep dish portion as a reference,
An oil pan characterized by being formed smaller than the engine mounting angle.