JP2005009346A - Engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating device for an engine, for preventing suction of air from an oil suction port to perform good lubrication even when an oil amount in an oil pan gets low or even when the oil is uneven, and for easily taking an oil strainer out without disassembling a crankcase. <P>SOLUTION: The lubricating device comprises: the oil strainer 15 disposed to the oil pan 10; an oil passage 13 circulating the oil 11 sucked through the oil strainer; a weir member disposed to be separated from the oil strainer 15 with a predetermined clearance; a drain bolt 16 detachably disposed to a lower part of the oil pan 10. The oil strainer 15 is supported by the drain bolt 16 and disposed at a predetermined position, when the drain bolt 16 is mounted to the oil pan 10. The oil strainer 15 is taken out of the inside of the oil pan 10 to the outside, when the drain bolt 16 is removed. The weir part extends in an approximately vertical direction with respect to the oil level. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an engine lubrication apparatus that filters and sucks oil stored in an oil pan, circulates the oil stored in an oil pan, circulates the oil in each part of the engine, and lubricates each part.
[0002]
[Prior art]
Conventionally, in a general engine, each part of the engine is lubricated by oil pumped by an oil pump. This lubrication system includes a wet sump system and a dry sump system.
[0003]
The wet sump system is a system in which oil stored in an oil pan provided at the lower part of the crankcase is sucked through an oil strainer by the operation of an oil pump and circulated to each part of the engine to lubricate each part. . On the other hand, the dry sump system is equipped with a pressure pump, a recovery pump, and an oil tank. Oil collected in a shallow oil reservoir at the bottom of the crankcase is sent to the oil tank by the recovery pump, and the oil in this oil tank is pumped. This is a system in which each part is lubricated by circulating with a pump.
[0004]
By the way, in the lubrication device adopting the wet sump method, when the amount of oil in the oil pan is reduced or when the oil stored in the oil pan is decelerated, for example, at the time of acceleration / deceleration, the oil is shifted to the front and rear of the vehicle. When the oil surface is inclined, the oil strainer suction port is not immersed in the oil and may be exposed to the air. As described above, if the suction port of the oil strainer is exposed to the air, the air is sucked from the oil strainer and the oil runs out, and there is a possibility that the engine parts cannot be sufficiently lubricated.
[0005]
Therefore, in the lubrication device adopting the wet sump method, when a guard wall surrounding the side wall of the oil strainer is provided and the amount of oil in the oil pan is reduced, or when the oil in the oil pan is offset. Even if there is an oil lubrication device for an engine that prevents the oil suction port from being exposed to the air until the oil surface becomes the lower end of the guard wall, and can perform good lubrication without sucking air. Is provided.
[0006]
In addition, in order to send the oil sent by the oil pump toward the friction part of each part of the engine, at least the oil passage portion from the oil pan to the strainer among the plurality of oil passage portions provided in the crankcase is used as the oil pan. There is a configuration formed by one inner wall surface which is a part of the crankcase wall surface of such a portion and a partition wall provided inside the oil pan along the one inner wall surface. In this lubricating device, the oil pan is divided into two parts so that air is not fed into the oil strainer. (Patent Document 1).
[0007]
Also, an oil strainer mounting structure is provided in an oil pan attached to the lower part of the crankcase and the pump connection port side end portion of the suction pipe communicating with the pump connection port of the lower crankcase is formed of a flexible member. Proposed. In this oil strainer mounting structure, when the oil is pressed against the wall of the oil pan by the action of the inertial force, the same inertial force acts on the oil strainer and the suction pipe, and the end of the pump connection port side However, since the oil strainer moves to the wall side with the pump connection port as the axis, the oil strainer moves to the wall side, so when the oil is pressed against the wall side, the oil strainer also moves to the wall side at the same time. The oil suction port is kept immersed in the oil so that the oil can be sucked in. (Patent Document 2).
[0008]
[Patent Document 1]
JP-A-7-224629 [Patent Document 2]
Japanese Patent Laid-Open No. 10-311210 [Problems to be Solved by the Invention]
However, in the conventional lubrication apparatus and oil strainer mounting structure, the oil strainer is directly attached to the crankcase, so the oil strainer cannot be taken out unless the crankcase is disassembled. It takes time and effort.
[0009]
The present invention aims to solve such conventional problems, even when the amount of oil in the oil pan is reduced, or even when the oil in the oil pan is offset, Provided is an engine lubrication device capable of easily taking out an oil strainer without disassembling a crankcase as well as being able to perform good lubrication without air being sucked from an oil suction port. For the purpose.
[0010]
[Means for Solving the Problems]
In order to achieve this object, the present invention includes an oil pan for storing oil, an oil strainer provided in the oil pan, an oil passage for circulating oil sucked through the oil strainer to each part of the engine, and Is provided with a predetermined gap from the oil strainer, and extends in a direction substantially perpendicular to the oil surface from a position corresponding to the upper end of the oil strainer. And a drain bolt that is detachably provided at a lower portion of the oil pan. The oil strainer is supported by the drain bolt when the drain bolt is attached to the oil pan, and When the drain bolt is removed from the oil pan, it is removed from the oil pan to the outside. There is provided a lubrication system for an engine comprising Te.
[0011]
In the lubricating device having this configuration, the dam member can prevent air from being sucked in from the oil suction port until the oil surface reaches the lower end of the dam member (until it falls). That is, even when the amount of oil in the oil pan is reduced or the oil in the oil pan is offset, good lubrication can be performed without air being sucked from the oil suction port. Further, since the oil strainer is taken out from the oil pan when the drain bolt is removed from the oil pan, the oil strainer can be easily taken out without disassembling the crankcase. it can. Therefore, the oil strainer can be easily cleaned.
[0012]
The oil strainer has a substantially U-shaped cross section, and is disposed such that an opening defined by the substantially U-shaped cross section is an upper part. The weir member is disposed outside the oil strainer. It can comprise a guard wall that is disposed at a predetermined distance from the outer peripheral surface. With this configuration, it is possible to prevent air from being sucked from the oil suction port until the oil surface (the height of the oil) is lowered from the lower end of the guard wall.
[0013]
Further, the oil strainer has a substantially U-shaped cross section, and is disposed such that an opening defined by the substantially U-shaped cross section is an upper portion, and the weir member is disposed inside the oil strainer. The pipe may be configured to communicate with the oil passage to suck up oil. With this configuration, it is possible to prevent air from being sucked from the oil suction port until the oil surface (the height of the oil) is lowered from the lower end of the pipe.
[0014]
In addition, the oil strainer has a substantially U-shaped cross section, and is disposed so that an opening defined by the U-shaped cross section is an upper part. The weir member is disposed outside the oil strainer. A guard wall that is disposed at a predetermined interval from the outer peripheral surface of the strainer, and a pipe that is disposed inside the oil strainer and communicates with the oil passage and sucks up oil. You can also By doing in this way, it can prevent more reliably that air is inhaled from an oil inlet.
[0015]
The pipe may be configured such that its lower end extends to a position lower than the lower end of the guard wall. By doing in this way, it can prevent more reliably that air is inhaled from an oil inlet.
[0016]
The guard wall is made of resin and can be integrally formed with the oil strainer.
[0017]
In the lubricating device according to the present invention, when the drain bolt is attached to the oil pan, the oil strainer is supported by the drain bolt and disposed at a predetermined position in the oil pan. An elastic member that biases the oil strainer may be provided. With this configuration, the oil strainer is pressed against the wall of the oil pan by the urging force of the elastic member, so that the oil strainer can be fixed (positioned) at a predetermined position in the oil pan.
[0018]
Furthermore, in the lubricating device according to the present invention, a magnet can be disposed on the drain bolt. In this way, for example, metallic dust such as gear burrs can be adsorbed to the drain bolt. Therefore, for example, even if metallic dust of a size that can pass through the oil strainer is mixed in the oil pan, it is possible to prevent the dust from damaging the oil pump and each part.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, an engine lubrication apparatus according to a preferred embodiment of the present invention will be described with reference to the drawings. In addition, embodiment described below is the illustration for demonstrating this invention, and this invention is not limited only to these embodiment. Therefore, the present invention can be implemented in various forms without departing from the gist thereof. In the present embodiment, a lubricating device for a motorcycle engine will be described. However, the lubricating device for an engine according to the present invention is not limited to a motorcycle.
[0020]
FIG. 1 is a sectional view showing the vicinity of an oil pan, an oil pump, and an oil cleaner of an engine lubrication device according to an embodiment of the present invention. FIG. 2 is an enlarged view of a part of the engine lubrication device shown in FIG. FIG. 3 is a perspective view schematically showing the vicinity of the strainer provided in the oil pan shown in FIG. 1, and FIG. 4 is an enlarged schematic view showing the vicinity of the oil strainer provided in the oil pan shown in FIG. FIG. 5 is a cross-sectional view showing a state where the oil is offset or the amount of oil is small, and FIG. 5 is a schematic cross-sectional view showing an enlarged area near the oil strainer provided in the oil pan shown in FIG. And it is a figure which shows the state in which the amount of oil is decreasing.
[0021]
As shown in FIGS. 1 to 5, an engine lubrication apparatus 1 according to the present embodiment is provided at a lower portion of a crankcase 2 of a motorcycle engine, and stores an oil pan 10 for storing oil and the oil pan 10. The oil pump 12 that sends the oil 11 to the crankshaft (not shown), the connecting rod (not shown), etc., which is the friction part of each part of the engine, and the oil 11 sent by the oil pump 12 is directed to the crankshaft, the connecting rod, etc. The oil passage 13 provided in the crankcase 2, the oil cleaner 14 provided in the middle of the oil passage 13, and the oil strainer 15 provided in the oil pan 10 for filtering the oil 11 of the oil pan 10. And a drain bolt 16 detachably provided on the bottom surface of the oil pan 10.
[0022]
The crankcase 2 has a left-right split type structure, and the oil pan 10 is disposed at the lower portion thereof by combining the left case 2L and the right case 2R. Reference numeral 17 denotes a split surface of the crankcase 2 and reference numeral 18 denotes a bore center.
[0023]
The oil pan 10 can store the oil 11 therein, and communicates with the oil passage 13 at a position where the lower end of the oil passage 13 of the upper wall 19 defining the upper portion of the oil pan 10 is disposed. A hole 21 into which the upper end of the pipe 20 is press-fitted is opened. The pipe 20 as the weir member is press-fitted into the hole 21 to extend in a direction substantially perpendicular to the oil surface from a position corresponding to the upper end of the oil strainer 15, and the inner side of the oil strainer 15 described in detail later. It serves as a weir that prevents air from being sucked into the oil passage 13 when the oil level is lowered or offset. Further, the pipe 20 extends below the lower surface of a guard wall 30 (described later in detail) disposed outside the oil strainer 15 (see FIGS. 1 and 2), and a suction port for sucking up the oil 11 Also plays a role.
[0024]
An oil discharge port 23 into which the drain bolt 16 is detachably screwed is opened at a position on the bottom wall 22 of the oil pan 10 facing the hole 21. The oil discharge port 23 is formed with a larger diameter than the oil strainer 15 provided with a guard wall 30 described in detail later (that is, a diameter larger than the outer diameter of the guard wall 30), and the drain bolt 16 is removed. In this case, the oil strainer 15 provided with the guard wall 30 is easily discharged (taken out) together with the oil 11 to the outside. A female screw 24 is formed on the inner peripheral surface of the oil discharge port 23, and this female screw 24 is configured to be screwed with a male screw 41 formed on a drain bolt 16 described in detail later.
[0025]
The oil strainer 15 has a substantially U-shaped cross section, and is composed of a substantially cylindrical wire mesh in which the upper opening 31 has a substantially circular shape. A flange 32 protruding outward is formed on the upper end surface of the oil strainer 15. On the outer peripheral surface of the flange 32, a resin guard wall 30 extending downward with a predetermined gap from the outer peripheral surface 33 of the oil strainer 15 is integrated with the resin along the outer peripheral surface of the flange 32. Is formed. The upper surface of the guard wall 30 is formed at the same height (level) as the upper surface of the flange 22. That is, the guard wall 30 as the dam member is formed to extend in a direction substantially perpendicular to the oil surface from a position corresponding to the upper end portion of the oil strainer 15, and when the oil surface is lowered or offset. , It serves as a weir to prevent air from being sucked into the oil passage 13. The oil strainer 15 is disposed immediately above the oil discharge port 23, and the pipe 20 is positioned at the approximate center of the inside (internal space) thereof.
[0026]
In a gap formed between the oil strainer 15 and the guard wall 30, a coil spring 35 as an elastic member is disposed so as to surround the outer peripheral surface 33 of the oil strainer 15. The coil spring 35 is arranged so that one end is in contact with the lower surface 34 of the flange 32 of the oil strainer 15 and the other end is in contact with the inner side surface of the drain bolt 16 (that is, a step portion 42 described in detail later). Then, the male screw 41 of the drain bolt 16 and the female screw 24 of the oil discharge port 23 are screwed together and the oil strainer 15 is pressed against the upper wall 19 of the oil pan 10 by the biasing force generated by tightening the drain bolt 16. Yes. At this time, since the upper surface of the guard wall 30 is formed at the same height (level) as the upper surface of the flange 22, both abut against the upper wall 19 of the oil pan 10 without a gap. As a result, the oil strainer 15 is fixed at a predetermined position in the oil pan 10.
[0027]
Since the oil strainer 15 integrally provided with the guard wall 30 is disposed immediately above the oil discharge port 23 as described above, when the drain bolt 16 is removed from the oil discharge port 23, the oil strainer 15 It is released from the urging force of the coil spring 35 and can be easily dropped from the oil discharge port 23 to the outside.
[0028]
The drain bolt 16 has a male screw 41 formed on the outer peripheral surface thereof, and the male screw 41 can be screwed into a female screw 24 formed on the inner peripheral surface of the oil discharge port 23. A step portion 42 is provided around the inner peripheral surface of the drain bolt 16 so that the other end of the coil spring 35 contacts the step portion 42 when the drain bolt 16 is fitted into the oil discharge port 23. It has become. An O-ring groove 44 into which the O-ring 43 is inserted is formed in the outermost peripheral portion of the drain bolt 16 in FIG. 2, and the oil 11 stored in the oil pan 10 is exposed to the outside. Prevents leakage. In addition, a magnet 46 is disposed on the concave surface 45 facing the oil pan 10 at a substantially central portion of the drain bolt 16. For example, metallic dust having a size that can pass through the oil strainer 15 is oil. Even if they are mixed in the pan 10, these dusts are adsorbed here, so that the oil pump 12 and each part of the engine can be prevented from being damaged by these dusts.
[0029]
Next, a specific operation of the lubricating device 1 according to the present embodiment will be described.
[0030]
As an example of disposing the oil strainer 15 integrally provided with the guard wall 30 at a predetermined position of the oil pan 10, first, one end (upper end) of the coil spring 35 is fitted to the lower surface 34 of the flange 32 of the oil strainer 15. . Next, the oil strainer 15 is put into the oil pan 10 through the oil discharge port 23. In this state, when the male screw 41 formed on the drain bolt 16 and the female screw 24 formed on the oil discharge port 23 are screwed together and the drain bolt 16 is tightened to the oil discharge port 23, the coil spring 35 The other end (lower end) abuts against the step portion 42 of the drain bolt 16 and is pressed, and the oil strainer 15 is pressed against the upper wall 19 of the oil pan 10 by the urging force of the coil spring 35, and the arrangement position is fixed. Is done. Thus, the oil strainer 15 integrally provided with the guard wall 30 is disposed at a predetermined position in the oil pan 10 with the pipe 20 positioned in the inner space.
[0031]
In the lubricating device 1 of the thus engine oil strainer 15 is arranged, for example, or a L ₁ the height of the oil 11 is shown in FIG. 4, even fell further to L ₂ shown in FIG. 5, the oil Since the surface is higher than the lower end of the guard wall 30, it is possible to prevent air from being sucked into the oil passage 13 by the guard wall 30, and the oil flows as shown by arrows in FIGS. Supplied and good lubrication can be performed. Further, even if the oil 11 stored in the oil pan 10 to the acceleration and deceleration or the like oil surface is offset to the front and rear vehicle by inertia force is inclined (see line L ₃ to 4 indicated by a chain line), the oil surface If it is at a position higher than the lower end of the guard wall 30, it is possible to prevent air from being sucked into the oil passage 13 by the guard wall 30. Furthermore, since the lower end of the pipe 20 extends below the lower end of the guard wall 30, it is possible to more reliably prevent air from being sucked into the oil passage 13.
[0032]
On the other hand, as shown in FIG. 6, in the conventional configuration in which the guard wall and the pipe are not provided, when the oil surface falls below the upper end surface of the oil strainer 15, air is sucked into the oil passage 13. That is, when the height of the oil surface is L ₁ shown in FIG. 6, air is sucked into the oil passage 13.
[0033]
From this, it can be said that the lubrication apparatus 1 according to the present invention is more tolerant of oil level fluctuations than the conventional lubrication apparatus.
[0034]
Next, when the oil strainer 15 integrally provided with the guard wall 30 is taken out from the lubricating device 1, if the drain bolt 16 is removed from the oil discharge port 23, the coil spring 35 causes the oil strainer 15 to move to the oil pan 10. Therefore, the oil strainer 15 integrally provided with the guard wall 30 falls from the oil discharge port 23 and is easily taken out together with the oil 11. Therefore, unlike the prior art, it is not necessary to disassemble the crankcase 2 when taking out the oil strainer. For this reason, the cleaning operation | work of the oil strainer 15 can be performed efficiently.
[0035]
In the present embodiment, the case where the guard wall 30 is integrally provided outside the oil strainer 15 and the pipe 20 is disposed inside the oil strainer 15 has been described. However, the present invention is not limited to this, and the lubrication according to the present invention. As shown in FIG. 7, the apparatus 1 may be provided with only the guard wall 30 outside the oil strainer 15 without providing the pipe 20.
[0036]
Further, as shown in FIG. 8, the lubricating device 1 according to the present invention may be provided with only the pipe 20 without providing the guard wall 30. In this case, although the guard wall 30 is not provided, the coil spring 35 is disposed so as to surround the oil strainer 15 and exhibits the same effect as described above.
[0037]
Further, as shown in FIG. 9, the oil discharge port 23 may be further enlarged to eliminate the interference between the drain bolt 16 and the guard wall 30, and the guard wall 30 may be extended further downward. By doing in this way, even if the oil level is further lowered or greatly deviated, the fluctuation can be allowed.
[0038]
In the present embodiment, the case where the guard wall 30 is integrally formed of resin with the oil strainer 15 has been described. However, the present invention is not limited thereto, and the guard wall 30 is fixed to the upper wall 19 of the oil pan 10 in advance. You may keep it. In this case, only the oil strainer 15 is taken out from the oil discharge port 23.
[0039]
Furthermore, in the present embodiment, the case where the oil strainer 15 is made of a wire mesh has been described. However, the present invention is not limited to this, and the oil strainer 15 may be made of resin. In this case, it is also possible to manufacture the oil strainer 15 provided with the guard wall 30 by integral molding.
[0040]
Further, the magnet 46 disposed on the drain bolt 16 can be disposed by a desired method such as being embedded in the drain bolt 16 or laid on the surface, and the size and number of the magnets 46 are arbitrarily determined. be able to.
[0041]
Further, in the present embodiment, the case where the pipe 20 is press-fitted into the hole 21 formed in the upper wall 19 of the oil pan 10 has been described as an arrangement method of the pipe 20, but the pipe 20 is not limited to this. It can be arranged by any method such as stoppering or integral molding with the upper wall.
[0042]
Furthermore, in the present embodiment, the case where the oil strainer 15 is disposed and fixed at a predetermined position by pressing the oil strainer 15 against the upper wall 19 by the coil spring 35 has been described. A positioning member for determining the position of the oil strainer 15 (or the guard wall 30) with respect to the oil pan 10 may be provided on the upper wall 19.
[0043]
【The invention's effect】
As described above, the lubricating device for an engine according to the present invention prevents the air from being sucked in from the oil suction port until the oil surface reaches the lower end of the weir member (until it falls) by the weir member. be able to. Therefore, for example, even when the amount of oil in the oil pan is reduced or the oil in the oil pan is offset, the possibility of air being sucked from the oil suction port is reduced, and good lubrication is performed. be able to. The oil strainer is taken out from the oil pan when the drain bolt is removed from the oil pan. Therefore, the oil strainer can be easily taken out without disassembling the crankcase as in the prior art. As a result, the oil strainer can be easily cleaned.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the vicinity of an oil pan, an oil pump, and an oil cleaner of an engine lubrication apparatus according to an embodiment of the present invention.
2 is an enlarged cross-sectional view of a part of the engine lubrication apparatus shown in FIG. 1;
3 is a perspective view schematically showing the vicinity of an oil strainer provided in the oil pan shown in FIG. 1. FIG.
4 is an enlarged schematic cross-sectional view showing the vicinity of an oil strainer provided in the oil pan shown in FIG. 1, and shows a state in which the oil is offset or the amount of oil is small.
5 is an enlarged schematic cross-sectional view showing the vicinity of an oil strainer provided in the oil pan shown in FIG. 1, and shows a state where the amount of oil is reduced.
FIG. 6 is an enlarged schematic cross-sectional view showing the vicinity of an oil strainer provided in a conventional oil pan.
FIG. 7 is a perspective view schematically showing the vicinity of an oil oil strainer according to another embodiment of the present invention.
FIG. 8 is a perspective view schematically showing the vicinity of an oil oil strainer according to another embodiment of the present invention.
FIG. 9 is a perspective view schematically showing the vicinity of an oil strainer according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine lubricating device 2 Crankcase 10 Oil pan 11 Oil 13 Oil passage 15 Oil strainer 16 Drain bolt 19 Upper wall 20 Pipe 23 Oil discharge port 30 Guard wall 35 Coil spring

Claims (8)

An oil lubrication device for an engine comprising an oil pan for storing oil, an oil strainer provided in the oil pan, and an oil passage for circulating oil sucked through the oil strainer to each part of the engine. And
A weir member that is disposed with a predetermined gap from the oil strainer and that extends in a direction substantially perpendicular to the oil surface from a position corresponding to the upper end of the oil strainer;
A drain bolt detachably provided at the bottom of the oil pan;
With
When the drain bolt is attached to the oil pan, the oil strainer is supported by the drain bolt and disposed at a predetermined position in the oil pan, and the drain bolt is removed from the oil pan. On the other hand, an engine lubricating device is taken out from the oil pan. The oil strainer has a substantially U-shaped cross section, and is disposed such that an opening defined by the U-shaped cross section is an upper part.
2. The engine lubrication device according to claim 1, wherein the dam member comprises a guard wall disposed outside the oil strainer at a predetermined distance from an outer peripheral surface of the oil strainer. The oil strainer has a substantially U-shaped cross section, and is disposed such that an opening defined by the substantially U-shaped cross section is an upper part.
2. The engine lubrication device according to claim 1, wherein the dam member is disposed inside the oil strainer and includes a pipe that communicates with the oil passage and sucks up oil. 3. The oil strainer has a substantially U-shaped cross section, and is disposed such that an opening defined by the substantially U-shaped cross section is an upper part.
The weir member is
A guard wall that is disposed outside the oil strainer at a predetermined interval from the outer peripheral surface of the oil strainer;
A pipe disposed inside the oil strainer and connected to the oil passage to suck up oil;
The engine lubrication device according to claim 1, comprising: The engine lubrication device according to claim 4, wherein the pipe has a lower end extending to a position lower than a lower end of the guard wall. The engine lubrication apparatus according to any one of claims 2, 4, and 5, wherein the guard wall is made of resin and is integrally formed with the oil strainer. An elastic member that biases the oil strainer so that the oil strainer is supported by the drain bolt and disposed at a predetermined position in the oil pan when the drain bolt is attached to the oil pan; The engine lubrication device according to any one of claims 1 to 6. The engine lubrication device according to any one of claims 1 to 7, wherein a magnet is disposed on the drain bolt.

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