JP2005088762A - Fuel inlet strainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel inlet port strainer capable of accurately detecting the height of oil level by preventing the flow of oil at the time of refueling from hitting on a float. <P>SOLUTION: The fuel inlet strainer supports the float 10 for an oil level gage, at a strainer main body 1 provided with a net portion 5 filtering impurities on a peripheral wall so as to vertically move along the strainer main body 1. A protecting wall 3f' intercepting the oil flow by refueling is formed at a part opposite to the float 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an oil supply strainer that is attached to an oil supply port of an oil tank that is installed in various heavy machinery such as construction machines, and that prevents impurities from entering the oil tank during oil supply. The present invention relates to a strainer for an oil filler provided with a float for an oil gauge that enables it.

  Generally, the above-described strainer for an oil filler (hereinafter, also simply referred to as “strainer”) is configured by fixing a net along the periphery of a cup-shaped frame. It is installed so as to fit. After attaching such a strainer to the oil filler port, the oil can be caught by inserting the oil hose into the oil filler port to catch the impurities with the net.

By the way, when such a strainer is attached to the fuel filler opening, the height of the liquid level in the oil tank cannot be visually recognized from the outside during fueling. Therefore, as disclosed in Patent Document 1 and Patent Document 2, it is known that the strainer is provided with a float for an oil level gauge that floats as the liquid level rises. It is possible to recognize that the liquid level has reached an appropriate position by looking at the rise of the. Specifically, Patent Document 1 discloses a structure in which a float that floats as the liquid level rises is supported in the strainer body so as to be able to move up and down, and Patent Document 2 discloses that the liquid level rises. There is disclosed a structure in which a spherical float mounted on a rod is supported so as to be able to move up and down outside the strainer body so that it floats accordingly.
Utility Model No. 2508286 Japanese Patent No. 3147688

  However, in the strainer disclosed in Patent Document 1 described above, since the float is supported on the inside of the strainer body, the oil flow hits the float when the oil supply hose is inserted, and the stability of the float is lost. However, there is a problem that the height of the liquid level cannot be detected accurately.

  Further, in the strainer disclosed in Patent Document 2 described above, the float is supported outside the strainer body, and as in the configuration of Patent Document 1, it is possible to prevent oil from directly hitting the float during refueling. Since the peripheral wall is formed of a mesh body, the oil flow during refueling passes through this mesh body and hits the float (especially the spherical floating portion). As a result, the stability of the float is lost and the liquid is accurately There is a problem that the height of the surface cannot be detected.

  The present invention has been made paying attention to such a problem, and prevents the oil flow at the time of refueling from hitting the float and enables the oil level to be accurately detected. The purpose is to provide a strainer.

  In order to solve the above-mentioned problems, the strainer for an oil filler opening according to the present invention has a float for an oil level gauge on a strainer body provided with a mesh part for filtering impurities on a peripheral wall, and can move up and down along the strainer body. In the structure supported by the above, the strainer body is characterized in that a protective wall that blocks the flow of oil due to refueling is formed in a portion facing the float.

  According to the above configuration, when the oil filler strainer is loaded into the oil filler opening of various heavy machinery and the oil hose is inserted to supply oil, the float is immersed by the liquid level as the amount of oil supplied increases. When it comes out, it rises by its buoyancy. At this time, since the float is cut off from the oil flow discharged from the oil supply hose by the protective wall, it is not affected by the oil flow at the time of oil supply, and the liquid level is accurately detected. Is possible.

  According to the oil inlet strainer of the present invention, the oil flow is prevented from hitting the rising oil level gauge float at the time of refueling. Can be detected.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a fuel filler strainer according to the present invention will be specifically described with reference to the accompanying drawings.
1-5 is a figure which shows 1st Embodiment of the strainer based on this invention, FIG. 1 is a longitudinal cross-sectional view of a strainer, FIG. 2 (a) is the AA line of FIG. 2B is a cross-sectional view taken along line BB in FIG. 1, FIG. 3 is a vertical cross-sectional view showing a state in which the strainer shown in FIG. FIG. 5A is a longitudinal sectional view showing a state in which the oil level has risen after the strainer is attached to the fuel filler opening, and FIGS. 5A and 5B are diagrams showing a configuration example of the float.

  The main body 1 of the strainer is formed in a bottomed cylindrical shape (substantially cup shape) that opens upward. In this embodiment, the strainer body 1 has a bottomed cylindrical shape corresponding to the diameter of the oil supply port 21 of the oil tank 20. Is formed. The main body 1 includes a frame body 3 for maintaining its rigidity and preventing breakage, and a net portion 5 that allows oil to permeate into the oil tank while filtering impurities. In this case, the frame body 3 is formed by an upper frame 3a formed in a cylindrical shape extending downward from the edge of the fuel filler opening by a predetermined length, and a circular frame and a cross-shaped frame installed in the frame as shown in FIG. A plurality of vertical frames 3c disposed in the vertical direction of the strainer body 1 (from the opening to the bottom direction) at substantially the same interval for connecting the two frames, and the vertical frames 3c around the intermediate frame at a substantially intermediate position. It is formed by one horizontal frame 3d connected in the direction. Note that a plurality of the lateral frames may be formed or may not be formed at all. A flange 3e that bulges radially outward and is engaged with the oil supply port 21 of the oil tank 20 is formed at the upper end opening position of the upper frame 3a. Further, the net portion 5 forms a peripheral wall and a bottom wall of the main body 1 covering these frames.

  The frame body 3 has an oil level gauge float 10 that rises along with the main body 1 as the oil level in the oil tank 20 rises when the frame body is attached to the oil supply port 21. It is arranged. Specifically, the float 10 is held in a guide hole 7 formed along the axial direction of a bulging portion 3f bulged and formed in a substantially semi-cylindrical shape toward the inside of one vertical frame 3c. From the opening 7a, it can be moved up and down and can be extracted. The guide hole 7 has a circular cross section having substantially the same diameter in the longitudinal direction, and is formed to have a diameter larger than the diameter of the float so that the inserted float 10 can move up and down. The portion in which the guide hole 7 is formed may be the above-described vertical frame 3c portion, and is formed to bulge inward with respect to the peripheral wall of the main body 1 at a position different from the position where the vertical frame is disposed. Alternatively, it may be formed in a bulging portion that bulges outward or bulges inward and outward.

  The bulging portion 3f is formed to extend a predetermined length toward the lower side of the frame body 3, and the lower side of the upper frame 3a is notched on the surface side to expose the float 10. That is, as shown in FIG. 2B, the lower region of the float 10 is located in a recess having a U-shaped cross-section cut out on the radially outer side of the bulging portion 3f. The inner peripheral surface 3 f ′ of the recess facing the float 10 has a function as a protective wall that prevents the oil flow from hitting the float 10 during refueling, and in particular, an opening portion of the strainer body 1. When the oil supply hose is inserted into the oil supply hose, the oil flow from the center of the strainer body 1 toward the outside in the radial direction is prevented from hitting the float.

  The strainer body 1 constituted by the guide hole 7 formed in the bulging portion 3f as described above and the frame body 3 having the protective wall 3f ′ and the net portion 5 is integrated with a material such as synthetic resin or metal. It is possible to form. Alternatively, the frame body 3 and the net part 5 may be formed separately, and the net part 5 may be attached to the frame body 3 by adhesion or the like.

  The float 10 is configured as a hollow rod-shaped member having a circular (cylindrical) cross section by blow molding, and the upper side thereof is a small-diameter rod portion 10a and the lower side is a large-diameter float portion 10b. In this case, the entire rod portion 10a and the float portion 10b may be formed in a hollow shape. For example, as shown in FIG. 5B, the rod portion 10a portion may be formed in a solid shape. . Or you may form by a foam, without forming a hollow part, and may integrally form with the material whose specific gravity is lighter than the oil to supply. Further, as shown in FIG. 5A, for example, as shown in FIG. 5A, the outer surface of the float 10 has a rod portion 10a that can be visually recognized with a maximum amount of oil (reference liquid level) determined by a heavy machine to be used. It is preferable to provide a mark S2 or the like at a position corresponding to the upper opening of the guide hole 7 that has been color-coded as described above or has reached the maximum amount of stored oil and has risen.

  The float 10 can be inserted into the guide hole 7 through the float 10b on the lower side into the upper opening 7a of the guide hole 7, and a stopper 10c protruding in the circumferential direction is formed at the upper end of the float 10. The contact is prevented from coming off by coming into contact with the opening 7a of the guide hole.

  As shown in FIG. 3, the strainer configured as described above is inserted and fitted into the oil supply port 21 of the oil tank 20 after removing the oil supply port cap (not shown). At this time, the flange 3e formed at the upper end opening position of the upper frame 3a is arranged to engage with the receiving portion 21a of the fuel filler 21. In this state, an oil supply hose (not shown) is inserted into the upper opening of the main body 1 to supply oil.

  In this case, the float 10 is inserted into the guide hole 7 formed in the frame body 3 and is located inside thereof, so that it does not become an obstacle when the main body 1 is inserted, and the guide hole Since it is located inside and protected by the protective wall 3f ′, it does not come into contact with the oil supply hose and is prevented from being damaged during fueling. The protective wall 3f ′ is formed wider than the width when the float 10 is viewed from the front.

  When the liquid level in the oil tank rises due to refueling and the liquid level comes into contact with the float portion 10b of the float 10, the float 10 starts to rise, and becomes a predetermined reference liquid level as shown in FIG. It can be visually recognized by color classification, a mark or the like provided on the float 10, thereby finishing the refueling. At this time, as shown in FIG. 2 (b), the float portion 10 b is arranged along the outside of the protective wall 3 f ′, and a substantially half circumference on the strainer body 1 side is formed by the protective wall 3 f ′ wider than the float 10. Since it is covered, the float 10 is not affected by the flow of oil and can rise in a stable state. When the oil reaches the reference liquid level, the liquid level is accurately detected. It becomes possible to do. In particular, since the flow from the inserted hose side can be effectively blocked by the protective wall 3f ′ provided along the peripheral wall of the strainer body 1, the float 10 fluctuates in a direction other than the vertical direction due to the oil flow during refueling. Is suppressed. Thereafter, the float 10 is held in the main body in a state of being located in the guide hole 7 by closing the cap of the fuel filler port 21.

  In the above configuration, since the float 10 is configured to be detachable, only the float can be easily replaced, and the stopper 10c protruding in the circumferential direction is formed at the upper end portion. By reducing the amount of oil, the float does not fall into the oil tank by mistake.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In these drawings, FIG. 6 is a longitudinal sectional view of the strainer, FIG. 7A is a sectional view taken along the line CC in FIG. 6, and FIG. 7B is a line DD in FIG. FIG. 8 is a longitudinal sectional view showing a state in which the strainer shown in FIG. 6 is attached to the oil filler port, and FIG. 9 shows a state in which the oil level has risen after the strainer is attached to the oil filler port. 10 is a view of the strainer as viewed from the E direction in FIG. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  Of the plurality of frames constituting the frame body 3, one of the vertical frames 3c (indicated here by reference numeral 3c ′) is formed with a bulging portion 3g bulging outward in a substantially semi-cylindrical shape. Here, a guide hole 7 which is hollow and open upward is integrally formed. An oil level gauge float 10 is inserted into the guide hole 7 from the upper opening 7a so as to be movable up and down. In this case, the bulging part 3g is formed up to a substantially middle position of the frame body 3, and the lower part thereof is opened so that the float part 10b of the float 10 is exposed.

  Further, as shown in FIGS. 7B and 10, the vertical frame 3 c ′ of this part is wider than the vertical frame 3 c of other parts, specifically, the diameter of the float part 10 b of the float 10. Widely formed. And the float part 10b of the float 10 is distribute | arranged along the outer side of the vertical frame 3c 'which is a protective wall. The vertical frame 3 c ′ thus formed has a function as a protective wall that prevents the oil flow from hitting the float 10 during refueling. In particular, an oil hose is provided at the opening of the strainer body 1. When oiling is performed by being inserted, the oil flow from the center of the strainer body 1 toward the outside in the radial direction is prevented from hitting the float.

  As shown in FIG. 8, the strainer configured as described above is inserted and fitted into the oil supply port 21 of the oil tank 20 after removing the oil supply port cap (not shown). When oil is supplied in this state and the liquid level in the oil tank 20 rises and comes into contact with the float portion 10b of the float 10, the float 10 starts to rise and becomes a predetermined reference liquid level as shown in FIG. It can be visually recognized by the color classification, the mark, etc. provided in the float 10. At this time, since the oil flow from the center side of the main body 1 toward the outer side in the radial direction does not hit the float portion 10b by the protective wall 3c ′ provided along the strainer main body 1, the float 10 does not flow into the oil flow. The liquid can be lifted in a stable state without being affected, and the height of the liquid level can be accurately detected.

  The protective wall 3c ′ shown in FIG. 10 is formed over the entire vertical direction of the frame body 3, but when the float 10 rises as the liquid level rises and approaches the reference liquid level, If configured so as not to be affected by the flow of oil, the float 10 rises stably, and the reference liquid level can be accurately detected. For this reason, as shown in FIG. 11, the protective wall 3c 'wider than the float 10 has at least the float 10b of the float 10 in the strainer body 1 when the float 10 rises and the oil reaches the reference liquid level. What is necessary is just to be provided in the part corresponding to a position, and what was formed corresponding to the area | region which can detect a reference | standard liquid level should just be used.

  As described above, in the present invention, a protective wall is formed in a portion of the main body 1 that faces the float 10 so that the flow of oil does not strike the float 10 that is held in the main body 1 so as to be movable up and down. Any configuration can be used. For this reason, the shape of the protective wall is curved over the outer peripheral portion of the float 10 as in the first embodiment, or opposed to the outer peripheral surface of the float 10 as in the second embodiment. It can be modified as appropriate, for example, to have a planar shape. Of course, the protective wall may be configured to cover the entire outer peripheral portion of the float 10.

  Further, the main body 1 described above only needs to support the float so as to be movable up and down, and the arrangement of the frames of the frame body 3 constituting the main body 1 can be appropriately modified. Further, the guide hole 7 provided in the frame body is not limited to being formed in the frame portion extending in the axial length direction, but may be any one that is simply configured to be able to guide the float in the vertical direction. The body 3 may be formed separately or attached to the main body 1. Further, the shape, axial length, thickness, number, etc. of the guide hole 7 can be appropriately changed, and the guide hole 7 and the portion where the guide hole is formed (the bulging portion, the vertical portion, etc.). The frame or the like may be any structure that is configured to move the float 10 up and down stably. Furthermore, the shape and the constituent material of the float 10 can be appropriately modified. For example, a configuration in which the float 10 cannot be extracted from the guide hole 7 may be used.

It is a figure which shows 1st Embodiment of the strainer which concerns on this invention, and is longitudinal direction sectional drawing of a strainer. (A) is sectional drawing along the AA line of FIG. 1, (b) is sectional drawing along the BB line of FIG. The longitudinal cross-sectional view which shows the state which mounted | wore the oil filler with the strainer shown in FIG. The longitudinal cross-sectional view which shows the state which raised the oil liquid level after mounting | wearing a strainer with the oil filler. (A), (b) is a figure which shows the structural example of a float, respectively. It is a figure which shows 2nd Embodiment of the strainer which concerns on this invention, and is longitudinal direction sectional drawing of a strainer. (A) is sectional drawing along CC line of FIG. 6, (b) is sectional drawing along DD line of FIG. The longitudinal cross-sectional view which shows the state which mounted | wore the oil filler with the strainer shown in FIG. The longitudinal cross-sectional view which shows the state which raised the oil liquid level after mounting | wearing a strainer with the oil filler. The figure which looked at the strainer from E direction in FIG. The figure which shows the modification of a strainer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strainer main body 3 Frame body 3c Vertical frame 3f ', 3c' Protective wall 7 Guide hole 10 Float 20 Oil tank 21 Refueling port

Claims (2)

In the strainer for the oil supply port, the float for the oil level gauge is supported on the strainer body provided with a net part for filtering impurities on the peripheral wall so as to be movable up and down along the strainer body.
A strainer for an oil filler opening, wherein a protective wall that blocks the flow of oil due to oil supply is formed on a portion of the strainer body facing the float.   The strainer for an oil filler opening according to claim 1, wherein the protective wall is formed wider than the float.

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