JP2014084808A - Oil regulating mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To configure an oil regulating mechanism in which during operation of an oil pump, oil is filtrated, and during stoppage of the oil pump, oil flowing into an oil storage part is regulated.SOLUTION: A control member 22 having a number of openings 22H and a control member 23 having a number of openings 23H are relatively-movably provided in a case 21. When the oil pump is operated and a negative pressure is applied, oil is circulated through the openings 22H and the openings 23H by separating the control member 22 from the control member 23. During stoppage of the oil pump, the control member 22 and the control member 23 are brought into close contact with each other so as to put the openings 22H and 23H in a non-communicating state for regulating flow of oil.

Description

  The present invention relates to an oil regulating mechanism that regulates the flow of oil supplied from an oil pump driven by an internal combustion engine, and more specifically, when an oil pump is stopped, oil in an oil passage through which oil is sent by the oil pump. The present invention relates to a technology for regulating escape.

  As an oil regulating mechanism configured as described above, Patent Document 1 includes an oil pump driven by an engine, and the oil pump sucks oil from an engine oil pan through a strainer and a strainer pipe. The structure which supplies this to each engine sliding part is described.

  In Patent Document 1, a filter made of a wire mesh is provided at the lower end of a case-like strainer, and an opening / closing plate is provided that can be switched between a posture overlapping the upper surface of the filter and a lifting posture, and the opening / closing plate is used as a check valve. It is functioning. In this configuration, the opening / closing plate is swingably supported by a hinge and is biased by a spring in the closing direction, and has a plurality of protrusions on the lower surface side of the opening / closing plate.

  With such a configuration, when the engine is operated, the open / close plate is opened by the action of the negative pressure when the oil is sucked into the oil pump, thereby allowing the oil to flow. When the engine is stopped, the open / close plate is closed by the urging force of the spring, and the phenomenon that the oil in the strainer pipe flows out of the strainer to the oil pan is prevented. Further, when the opening / closing plate reaches the closed state in this way, the projections are inserted into the filter mesh to remove dust and the like.

JP-A-7-247819

  In hydraulic equipment, when an oil pump is operated, it is desired to supply oil quickly to a supply target. As a specific example, an oil pump that is driven by an engine, such as a passenger car, and that includes a hydraulic device to which oil is supplied from the oil pump, can be applied to the hydraulic device within a short time after the engine is started. It is desired to supply oil.

  In response to such a demand, an oil supply mechanism described in Patent Document 1 may be provided. However, in a case where a large-sized opening / closing plate swings as in Patent Document 1, it is considered that the opening / closing plate causes resistance to the flow of oil, resulting in a decrease in the amount of oil. Further, in the oil supply mechanism described in Patent Document 1, it is necessary to swing the opening / closing plate largely in order to suck the oil from the suction surface of the strainer without being obstructed, and a swinging space for the opening / closing plate is required. It was something to do.

  An object of the present invention is to rationally configure an oil restriction mechanism that filters oil when the oil pump is operating and restricts the flow of oil to the oil reservoir when the oil pump is stopped.

  A feature of the present invention is that it comprises an oil regulating portion that prevents the oil in the supply oil passage from flowing into the oil storage portion when the oil pump that sends the oil in the oil storage portion to the supply oil passage is stopped. The restricting portion is configured to include a case having an internal space communicating with the supply oil passage, and a plurality of control members that are supported by the case and have a plurality of openings that allow passage of oil. The members are disposed so as to be relatively displaceable at a position where they overlap each other and a position where they are separated from each other, so that when the oil is sucked into the oil pump, a plurality of the control members are separated due to the flow of the oil. When oil is not sucked into the pump, a plurality of the control members are overlapped with each other, and the openings of the respective control members are in a non-communication state to prevent oil flow. There is the point that has been made.

According to this configuration, when the oil pump is stopped, the plurality of control members are overlapped, and the opening formed in the control member is not in communication. As a result, the flow of oil inside the case is blocked and the oil in the supply oil passage does not flow out to the oil reservoir. Further, when the oil pump is started, oil remaining in the supply oil passage can be sent simultaneously with the start. When the oil pump is continuously operated, the plurality of control members are separated by the flow of the oil, and the oil from the oil reservoir is supplied to the plurality of openings formed in the plurality of control members and supplied as a result. Oil is supplied to the oil passage.
In particular, in this configuration, since a large number of openings are formed in the control member, oil is filtered through these openings, and the openings formed in the control member are separated by separating the plurality of control members from each other. Thus, the oil can flow, and the oil can be sent in a state in which no resistance is applied to the oil without greatly moving the control member.
Accordingly, an oil regulating mechanism is configured that filters oil when the oil pump is activated and prevents oil from flowing to the oil reservoir when the oil pump is stopped.

  In the present invention, the plurality of control members include a fixed filter plate having a first opening as the opening and a pyramid-shaped upper surface, and a lower surface having a second opening as the opening and capable of being in close contact with the upper surface. The fixed filter plate is fixed to the open portion at the lower end of the case, and the movable filter plate is arranged inside the case so as to be movable up and down above the fixed filter plate. May be.

According to this, when the oil pump is stopped, the lower surface of the movable filter plate overlaps with the pyramid-shaped upper surface of the fixed filter plate. In this overlapping state, since the relative position between the first opening of the first filter and the second opening of the movable filter plate is determined, by setting a positional relationship in which the first opening and the second opening do not communicate with each other. Oil flow can be blocked.
In addition, when the oil pump starts to operate, the movable filter plate is displaced upward, so that a space for flowing oil is secured between the fixed filter plate and the movable filter plate, and the required oil flows. Thus, the dust contained in the oil can be removed by the fixed filter plate.

  In the present invention, the first opening is formed by punching from the upper surface of a plate material forming the fixed filter plate, and the second opening is punched from the lower surface of a plate material forming the movable filter plate. It may be formed by processing.

  For example, when a plate material is punched from the upper surface with a press machine or the like, a so-called burr that protrudes downward is formed on the outer periphery on the lower surface side of the opening formed by the processing. For this reason, a contact state is created by bringing the surfaces of the fixed filter plate and the movable filter plate that do not have burrs into contact with each other. As a result, no oil flows between them, and the flow of oil between the first opening and the second opening is blocked, and the fixed filter plate and the movable filter plate can function as a check valve. It becomes possible.

  In the present invention, the total area obtained by combining the areas of the plurality of first openings of the fixed filter plate and the total area of the areas of the plurality of second openings of the movable filter plate are set to be equal to each other. Also good.

  According to this, in order to make the flow velocity of the oil flowing through the first opening of the fixed filter plate equal to the flow velocity of the oil flowing through the second opening of the movable filter plate, a large pressure difference between the fixed filter plate and the movable filter plate. Is not generated, and deformation such as bending is not caused to the fixed filter plate or the movable filter plate.

  The present invention may be configured as a strainer that removes dust contained in oil sucked from the oil reservoir by the case and the control member.

  According to this, it becomes possible to supply the oil pump which has been cleaned by removing the dust contained in the oil sucked from the oil reservoir with the control member.

It is a hydraulic circuit diagram of an oil supply apparatus. It is sectional drawing of the strainer of the state which accept | permits the flow of oil. It is sectional drawing of the strainer in the state which blocks | prevents the flow of oil. It is a perspective view which shows the fixed filter plate and movable filter plate which are in the separation state. It is a perspective view which shows the fixed filter plate and movable filter plate in a close_contact | adherence state. It is sectional drawing of the strainer which exists in the attitude | position which a movable filter plate accept | permits the flow of oil in another embodiment (a). It is sectional drawing of the strainer which exists in the attitude | position which a movable filter plate prevents the flow of oil in another embodiment (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration]
As shown in FIG. 1, a supply oil passage 1 that supplies oil from an oil pump P driven by an engine E (an example of an internal combustion engine) to a valve opening / closing timing control device 10, and an oil that is branched from the supply oil passage 1 The oil supply device of the engine E is configured with the branch oil passage 2 that supplies the oil to the main gallery 11 as a lubricating part of the engine E.

  The oil supply device includes a supply oil passage 1 that sucks oil from an oil pan Ep (an example of an oil storage portion) of the engine E and sends the oil to an oil pump P. A strainer 20 (an example of an oil regulating part) is interposed on the side. The supply oil passage 1 is configured to send oil to a control valve V that controls the valve opening / closing timing control device 10, and to send oil from the branch oil passage 2 branched from the middle of the supply oil passage 1 to the main gallery and the like 11. ing.

  In addition, an oil filter 3 and an oil cooler 4 for filtering oil sent from the oil pump P are interposed in the supply oil passage 1.

 With such a configuration, when the engine E is in operation, the oil pump P sucks the oil in the oil pan Ep through the strainer 20 and sends it out to the supply oil path 1. The oil sent to the supply oil passage 1 is sent to the control valve V through the oil filter 3 and the oil cooler 4, and is supplied from the control valve V to the valve opening / closing timing control device 10 to be supplied to the intake valve of the engine E, or Realize the change of the timing of the exhaust valve. Part of the oil sent to the supply oil passage 1 is supplied from the branch oil passage 2 to the main gallery and others 11 to lubricate each part of the engine E.

  The control valve V is controlled by a control device such as an ECU that controls the engine E. The main gallery 11 includes oil passages and nozzles for supplying oil to the crankshaft support surface of the engine E, the inner surface of the cylinder, and the like.

〔strainer〕
In this oil supply device, dust contained in oil is removed by the strainer 20 described above, and the strainer 20 functions as a check valve to constitute an oil regulating mechanism. By functioning as a check valve in this way, the phenomenon that the oil in the supply oil passage 1 flows out to the oil pan Ep due to its own weight when the engine E is stopped is prevented.

  As shown in FIGS. 1 to 5, the strainer 20 has a reverse funnel-shaped case 21 connected to the lower end of the supply oil passage 1, and is fixed as a control member at a position that closes an open portion at the bottom of the case 21. The filter plate 22 is fixedly provided, and a movable filter plate 23 as a control member is arranged in the case 21 so as to be movable up and down above the fixed filter plate 22. The strainer 20 is entirely disposed below the oil surface of the oil pan Ep.

  The fixed filter plate 22 is formed with four plate surfaces 22A by forming a metal plate into a pyramid shape that is square in plan view, and a large number of first openings 22H are formed on the four plate surfaces 22A. Has been. Similarly, the movable filter plate 23 forms four plate surfaces 23A by forming a metal plate into a pyramid shape that is square in plan view, and a large number of second plate surfaces 23A are formed on the second plate surfaces 22A. An opening 23H is formed.

  The fixed filter plate 22 and the movable filter plate 23 are used in such a posture that the top of the pyramid is directed upward. Further, the total area of the opening areas of the first openings 22H formed on the four plate surfaces 22A of the fixed filter plate 22 and the opening of the second openings 23H formed on the four plate surfaces 23A of the movable filter plate 23 are also shown. The total area including the areas is made equal. This equal value is not a completely coincident value but includes a substantially coincident value, whereby the flow rate of oil passing through the first opening 22H and the flow rate of oil passing through the second opening 23H are equal. Thus, deformation due to the differential pressure is suppressed, and the oil is allowed to flow well while being filtered.

  In a state where the movable filter plate 23 overlaps the upper surface of the fixed filter plate 22, the upper surfaces 22T of the four plate surfaces 22A of the fixed filter plate 22 and the lower surfaces 23U of the four plate surfaces 23A of the lower surface of the movable filter plate 23 are used. The shape, inclination angle, and the like of the plate surface 22A are set so as to be in close contact with each other.

  Further, in a state where the movable filter plate 23 overlaps the upper surface of the fixed filter plate 22, a large number of first openings 22H formed on the plate surface 22A of the fixed filter plate 22 and a large number of plates formed on the plate surface 23A of the movable filter plate 23. The relative positional relationship is set so that the second opening 23H is in a non-communication state.

  The first opening 22H of the fixed filter plate 22 is formed by punching from the upper surface 22T using a press or the like, and the second opening 23H of the movable filter plate 23 is formed by punching from the lower surface 23U using a press or the like. .

  For example, when an opening is formed by punching a plate material from the upper surface with a press machine or the like, a so-called sag surface is formed, which is gradually recessed from the periphery of the opening on the upper surface toward the opening. On the outer periphery of the lower surface side of the opening, a so-called burr-like surface that protrudes along the outer periphery of the opening is formed. Therefore, smooth surfaces are brought into contact with each other by setting the punching direction as described above. As a result, the upper surface 22T of the four plate surfaces 22A of the fixed filter plate 22 and the lower surface 23U of the four plate surfaces 22A of the fixed filter plate 22 overlap and are in close contact with each other, thereby preventing the oil flow.

  The strainer 20 having this configuration may be configured such that a gap is formed between the outer periphery of the movable filter plate 23 and the inner surface of the case 21 with the movable filter plate 23 spaced upward from the fixed filter plate 22. good.

[Operating form]
With this configuration, when the engine E is in operation, the movable filter plate 23 of the strainer 20 moves upward as shown in FIG. 2 due to the negative pressure when oil is sucked into the oil pump P. The lower surface 23U is separated from the upper surface 22T of the fixed filter plate 22. The oil sucked from the oil pan Ep by this separation passes through the first opening 22H of the fixed filter plate 22, and from the space formed between the upper surface 22T of the fixed filter plate 22 and the lower surface 23U of the movable filter plate 23. It flows so as to pass through the second opening 23H of the movable filter plate 23 and is sucked into the supply oil passage 1.

  Thereafter, when the engine E is stopped, no negative pressure is applied, so that the movable filter plate 23 is lowered by the action of its own weight and oil pressure, and overlaps with the upper surface of the fixed filter plate 22 as shown in FIG. The state in which the lower surface 23U of the movable filter plate 23 is in close contact with the upper surface 22T of the filter plate 22 is reached. In this close contact state, the flow of oil between the fixed filter plate 22 and the movable filter plate 23 is prevented as described above. In particular, when the viscosity of the oil rises after the engine E is stopped, the fluidity of the oil is lowered, so that the oil flow is more effectively prevented.

  That is, when the engine E is in operation, the oil is smoothly flowed by separating the movable filter plate 23 from the fixed filter plate 22 by the action of negative pressure, and the dust contained in the oil is removed by the fixed filter plate 22 constituting the strainer 20. Remove. Thereafter, when the engine E is stopped, the lower surface 23U of the movable filter plate 23 comes into close contact with the upper surface 22T of the fixed filter plate 22 to prevent the oil from flowing out from the supply oil passage 1 to the oil pan Ep, The state in which oil remains in the supply oil passage 1 is maintained.

  Therefore, when the engine E is started, the oil in the supply oil passage 1 can be supplied to the valve opening / closing timing control device 10 even during cranking, and the intake valve of the engine E before the engine E is started, Alternatively, the timing of the exhaust valve can be changed, and the engine E can be started well. Thus, the strainer 20 of the present invention also functions as a check valve that blocks the flow of oil.

[Another embodiment]
The present invention may be configured as follows in addition to the embodiment described above.

(A) As shown in FIG. 6 and FIG. 7, a fixed filter plate 22 as a control member is fixedly installed at a position where the lower open portion of the reverse funnel-shaped case 21 is closed, and a hinge is provided inside the case 21. A movable filter plate 23 serving as a control member is supported via 25 to be swingable. In this alternative embodiment, when the oil pump P operates, the movable filter plate 23 swings away from the fixed filter plate 22 by the action of negative pressure as shown in FIG. Further, as shown in FIG. 7, when the oil pump P is stopped, the movable filter plate 23 swings to a position where it overlaps the upper surface of the fixed filter plate 22, and the lower surface 23U of the movable filter plate 23 is placed on the upper surface 22T of the fixed filter plate 22. Are in close contact.

  In this close contact state, the first opening 22H and the second opening 23H are in a non-communication state to prevent oil flow. In this alternative embodiment (a), as in the above-described embodiment, when the engine E is operating, the strainer 20 removes dust contained in the oil while smoothly flowing the oil, and the engine E is stopped. It functions as a check valve that blocks the flow of oil in the strainer 20. In particular, by using the hinge 25, the accuracy of the relative position between the first opening 22H and the second opening 23H in the close contact state can be increased, and the oil flow can be satisfactorily prevented.

(B) The fixed filter plate 22 and the movable filter plate 23 are arranged such that the top of the pyramid of the fixed filter plate 22 of the above-described embodiment and the top of the pyramid of the movable filter plate 23 protrude downward. Set posture. Even in the case where the posture is set in this way, when the fixed filter plate 22 and the movable filter plate 23 overlap, the relative positional relationship between the first opening 22H and the second opening 23H is determined.

(C) A guide member for determining the relative positional relationship between the first opening 22H and the second opening 23H when the fixed filter plate 22 and the movable filter plate 23 overlap is provided. As the guide member, for example, a concave portion is formed on one side of the fixed filter plate 22 and the movable filter plate 23, and a convex portion that fits into the concave portion is formed on the other side, or a rail-shaped guide member that guides the movable filter plate 23 May be provided.

(D) The fixed filter plate 22 has a shape with a conical upper surface, and the movable filter plate 23 has a shape in which the upper surface of the fixed filter plate 22 is in close contact. In this configuration, since the fixed filter plate 22 and the movable filter plate 23 can be rotated relative to each other, the first opening 22H and the second opening are still in a state in which the fixed filter plate 22 and the movable filter plate 23 overlap each other even in a relatively rotated state. 23H is formed so as not to communicate with 23H. In particular, since the outer periphery of the movable filter plate 23 can be formed into a circular shape, the movable filter plate 23 can be smoothly operated.

(E) A plurality of filter plates are used as control members. As a specific example, for example, a single fixed filter plate 22 is used as in the embodiment, and a single movable filter plate 23 is used. The movable filter plate 23 is provided so as to be able to be in close contact with the upper surface of the movable filter plate 23. When three filter plates are used in this way, the arrangement of the openings of the uppermost movable filter plate 23 is set to be the same as the first opening 22H of the fixed filter plate 22, so that when each overlaps, Further, the opening is made in a non-communication state, and the effect of the check valve is exhibited well.

(F) A spring that biases the plurality of control members in a direction to bring them into close contact with each other is provided. By providing the spring in this way, the close contact state between the control members can be satisfactorily exhibited, and each opening can be maintained in a non-communication state.

(G) A resin plate is used for the control member, or a resin film is formed on the surface of the metal plate. In this configuration, since the resin surfaces are in close contact with each other, it is possible to satisfactorily prevent the oil flow at the close contact portion.

  The present invention can be used for a hydraulic device having an oil pump that sucks oil through a strainer.

1 Supply oil passage 20 Oil restriction section (strainer)
21 Case 22 Control member (fixed filter plate)
22H opening / first opening 22T upper surface 23 control member (movable filter plate)
23H Opening / second opening 23U Lower surface Ep Oil reservoir P Oil pump

Claims (5)

An oil regulating part that prevents the oil in the supply oil path from flowing into the oil storage part when the oil pump that sends the oil in the oil storage part to the supply oil path is stopped;
The oil restricting portion is configured to include a case having an internal space communicating with the supply oil passage, and a plurality of control members that are supported by the case and have a plurality of openings that allow passage of oil,
The plurality of control members are disposed so as to be relatively displaceable at a position where they overlap each other and a position where they are separated from each other, so that when the oil is sucked into the oil pump, the plurality of control members are separated by the flow of oil. When the oil pump does not suck oil, the plurality of control members are overlapped, and the opening of each control member is in a non-communication state to prevent the oil flow. . The plurality of control members have a fixed filter plate having a first opening as the opening and having a pyramidal upper surface, and a movable filter plate having a second opening as the opening and having a lower surface close to the upper surface. And
2. The oil regulating mechanism according to claim 1, wherein the fixed filter plate is fixed to an open portion at a lower end of the case, and a movable filter plate is disposed inside the case so as to be movable up and down above the fixed filter plate. .   The first opening is formed by punching the plate material forming the fixed filter plate from the upper surface, and the second opening is formed by punching the plate material forming the movable filter plate from the lower surface. The oil regulating mechanism according to claim 2.   3. The total area obtained by combining the areas of the plurality of first openings of the fixed filter plate and the total area of the areas of the plurality of second openings of the movable filter plate are set to be equal to each other. Or the oil control mechanism of 3.   The oil regulating mechanism according to any one of claims 1 to 4, wherein the case and the control member are configured as a strainer that removes dust contained in oil sucked from the oil reservoir.

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