JPS6319528Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an oil strainer provided in a lubricating oil supply system of an engine, transmission, etc.

In automobile engines, an oil pan is usually attached to the bottom of the crankcase to collect the oil that lubricates various parts of the engine, and the oil that collects at the bottom of the oil pan is passed through an oil strainer to an oil pump. It is then sucked in and then pumped again to each part of the engine using the same pump. The oil strainer has one end connected to the suction side of the oil pump, and the other end of the rigid pipe member is provided with an oil collection member having an inverted funnel shape and a device. The lower end opening of the member is opened as close as possible to the inner surface of the bottom of the oil pan so as not to suck in air even when the engine is tilted to some extent and the amount of oil is reduced to some extent. However, in the case of automobiles, etc., when driving on rough roads, the bottom of the engine often collides with stones and bumps on the road, which deforms the oil pan and applies a large force to the oil collecting member, causing damage to the oil pan. Cracks often occur between the oil collecting member and the oil pump, especially near the joint between the oil collecting member and the pipe member. In this case, if the air inside the oil pump enters through the crack, the amount of oil discharged from the oil pump decreases, causing a problem that the lubricating function of the engine is impaired. In addition, since the oil collection member has an inverted funnel shape and the diameter of the opening at the lower end is large, the angle of inclination of the engine at which the opening crosses the oil surface, that is, air enters the oil collection member, is reduced. However, this had the disadvantage that it was more likely to cause lubrication dysfunction.

The present invention has been devised to improve the drawbacks of the above-mentioned known devices, in which the upper end opening communicates with the oil pump, and the lower end opening is close to the bottom of the oil sump with a desired minimum distance. A first strainer member has a hollow tubular handle that opens at the opening, and a flexible umbrella that extends like an umbrella from the outer periphery of the handle, and the lower end peripheral edge is fixed to the oil reservoir, and the upper end is fixed to the oil reservoir. A second plate-shaped second plate whose opening is elastically closed by the peripheral edge of the umbrella part and has a large number of small-diameter oil holes on the outer peripheral surface between the upper end opening and the lower peripheral edge.
a strainer member, the shape of the lower opening edge is formed such that the distance between a part of the lower opening edge of the first strainer member and the bottom of the oil reservoir is larger than the minimum distance; The oil strainer is characterized in that the handle of the first strainer member is provided with a deformation allowing portion that allows relative displacement of the lower end with respect to the upper end. According to a preferred embodiment of the present invention, the first strainer member, including its handle and umbrella, is integrally made of an elastic material such as oil-resistant rubber or synthetic resin;
The opening area of the handle near the bottom of the oil reservoir (oil pan) is formed to be approximately equal to the diameter of the pipe member connected to the oil pump. On the other hand, a dish-shaped second strainer member is formed separately from the first strainer member, its lower end peripheral edge is fixed to the oil reservoir, and its upper end opening has an umbrella portion of the first strainer member. They are brought into elastic and sealing abutment. Furthermore, a large number of small holes are bored in the outer peripheral surface of the second strainer, and the second strainer functions as a permeator. Therefore, even if an external force acts on the oil sump and causes it to deform, and the second strainer member fixed to the oil sump deforms, the umbrella portion of the first strainer member remains flexible and elastic. Since the second strainer member is in contact with the upper end opening of the second strainer member to close the opening, there is no risk of overfunctioning of the first strainer member, and the oil suction at the lower end of the handle of the first strainer member is prevented. Although the opening is easily deformed and displaced, it is never blocked, so there is no problem with oil suction or air being sucked in. Furthermore, even if an external force acts on the oil reservoir and causes its bottom surface to deform greatly, and an impactful uplifting force is applied to the lower end of the handle of the first oil strainer member, the handle will not be able to tolerate deformation. Since the oil suction pipe and the oil pump are provided with such a portion, damage such as cracks is hardly caused to the oil suction pipe or the oil pump, and problems such as air being sucked in from the crack portion and resulting in insufficient lubrication can be effectively avoided. Furthermore, since the oil suction opening at the lower end of the handle of the first strainer member is formed to have a size substantially equal to the diameter of the oil supply pipe connected to the oil pump, it is possible to maintain a constant oil level. On the other hand, the critical angle of inclination of the engine for sucking air becomes larger, which has the advantage of increasing safety against lubrication malfunction.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Reference numeral 10 in the drawing generally indicates an oil strainer for an automobile engine, and the strainer is composed of a first strainer member 12 and a second strainer member 14. The first strainer member 12 has a hollow tubular handle 22 whose upper end opening 16 is fitted into an oil suction pipe 18 of an oil pump (not shown) and fixed to the oil suction pipe by an appropriate clip device 20; Umbrella part 24 that spreads out in an umbrella shape
It is made of an elastic material such as oil-resistant rubber or synthetic resin. The lower end opening 26 of the handle 22 opens close to the bottom surface of the oil reservoir 28, only a portion of which is shown, with a desired minimum interval, and the lower end opening 26 has a lower end edge thereof. For example, a semi-cylindrical lateral groove 30 as shown in FIG. 2 is provided so that the distance between a part of the oil reservoir and the bottom of the oil reservoir is greater than the minimum distance. Next, the second strainer member 14 is
It is preferably formed as a plate-shaped press-formed product made of a thin steel plate, and its lower end peripheral edge 32 is fixed to the oil reservoir 28 by spot welding, and its upper end opening 34 is made elastic by the peripheral edge of the umbrella part 24. Further, a large number of small-diameter oil passage holes 38 are bored in the outer circumferential surface 36 between the lower end peripheral edge 32 and the upper end opening 34. In addition, 40 is an air vent hole that communicates between the top of the lower surface of the umbrella part 24 and the hollow hole of the handle part 12, and 42 is an air vent hole that communicates between the lower surface top part of the umbrella part 24 and the hollow hole of the handle part 12.
A groove provided on the outer periphery of the handle between handle 1 and
2 forms a thin deformation allowing portion at the groove 42 portion.

In the above device, normally, the oil in the oil reservoir 28 enters the second strainer member 14 through the numerous oil passage holes 38, 38, and enters the lower end opening 26 of the handle 22 of the first strainer member 12 and the lateral groove 30. The oil is sucked up from the upper end opening of the same handle part through the suction pipe 1
8 and enters an oil pump (not shown). Even if the oil reservoir 28 comes into contact with an obstacle on the road and deforms upward while the vehicle is running, and the second strainer member 14 deforms slightly as a result, the flexible umbrella portion 24 , since the upper end opening 34 of the second strainer member is effectively sealed, air will not enter from this part, and on the other hand, in the worst case scenario, the oil reservoir 28 should leak into the lower end opening of the handle 12. 26, the oil passage is still secured by the lateral groove 30.
The oil pump can supply a sufficient amount of oil to each part of the engine. Furthermore, even if a force is applied to push up the handle 12 due to upward deformation of the oil reservoir 28, the handle 12 is easily deformed due to the presence of the deformation permitting portion, such as the groove 42, and therefore the oil suction pipe 18 and the oil There is no risk of excessive force acting on the pump. Furthermore, the opening 2 at the lower end of the handle 12 sucks the oil.
6 is extremely small compared to the diameter of the lower end opening of the conventionally known inverted funnel-shaped strainer, so when the engine is tilted, the angle at which the oil suction opening crosses the oil surface becomes significantly large, and the lubrication function is due to the tilt. The risk of malfunction occurring is greatly reduced.

Furthermore, in the device of the above embodiment, even if the shape of the oil reservoir 28 changes slightly depending on the engine model, or the relative position of the oil suction pipe 18 with respect to the oil reservoir 28 changes, the relationship between the handle 12 and the oil suction pipe 18 remains constant. The mounting relationship is flexible, and the cooperative relationship between the umbrella part 24 and the second strainer member 14 also has considerable margin in both the horizontal and vertical directions, so it can be applied to a wide range of models and is effective in mass production. There are advantages in that it is possible to achieve reductions in production costs and management costs due to common parts.

In the above embodiments, the present invention was applied to an oil strainer for an automobile engine, but the present invention can be widely applied to various devices other than engines, such as transmissions, having an oil reservoir. Of course, the same effects as described above can be achieved.

As detailed above, the oil strainer according to the present invention has an upper end opening that communicates with the oil pump,
a hollow tubular handle whose lower end opening opens close to the bottom of the oil reservoir at a desired minimum distance;
A first strainer member includes a flexible umbrella part extending like an umbrella from the outer periphery of the handle, and a lower end peripheral part thereof is fixed to the oil reservoir, and an upper end opening is attached to the peripheral part of the umbrella part. As a result, it is elastically occluded, and
a dish-shaped second strainer member having a large number of small-diameter oil holes on the outer circumferential surface between the upper end opening and the lower peripheral edge; The shape of the lower end opening edge is formed such that the distance between the part and the bottom of the oil sump is larger than the minimum distance, and the handle part of the first strainer member has a lower end relative to the upper end thereof. By providing a deformation tolerance part that allows displacement, there is less risk of lubrication failure due to deformation of the oil reservoir, and manufacturing and management costs can be reduced by promoting common parts. It is industrially useful.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is a transverse sectional view taken along the line - in FIG. 10... Oil strainer, 12... First strainer member, 14... Second strainer member, 18
... Oil absorption pipe, 22 ... Handle section, 24 ... Umbrella section, 28
...Oil reservoir, 38...Oil hole.

Claims (1)

[Scope of utility model registration request] A hollow tubular handle whose upper end opening communicates with the oil pump and whose lower end opening opens close to the bottom of the oil reservoir at a desired minimum distance; A first strainer member having a loose and flexible umbrella portion and a lower end peripheral edge thereof are fixed to the oil reservoir, and an upper end opening is elastically closed by the peripheral edge of the umbrella portion, a dish-shaped second strainer member having a large number of small-diameter oil holes on the outer circumferential surface between the upper end opening and the lower peripheral edge; The shape of the lower end opening edge is formed such that the distance between the part and the bottom of the oil sump is larger than the minimum distance, and the handle part of the first strainer member has a lower end relative to the upper end thereof. An oil strainer characterized by being provided with a deformation allowing portion that allows displacement.