CN100493944C - Coarse filter for oil supply port - Google Patents

Abstract

The invention is an object of the invention to provide a strainer for an oil supply mouth, preventing the oil flowing when supplying the oil from colliding with the float so as to accurately detect the height of the liquid level. The strainer for an oil supply mouth of the invention has a guide hole equipped in vertical directions and a float for an oil level gauge passing movably in vertical directions through this guide hole. When the oil comes up to an at least reference liquid level, the float is received at a lower end within the guide hole.

Description

Coarse filter for oil supply port

technical field

The invention relates to a coarse filter for the oil supply port installed on the oil supply port of the fuel tank equipped on various heavy machinery such as construction machinery to prevent impurities from entering the fuel tank during the oil supply, and specifically relates to an oil gauge with a detectable liquid level position The oil supply port of the buoy used is a coarse filter.

Background technique

Generally, the above-mentioned strainer for the oil supply port (hereinafter also referred to as "strainer") is formed by bonding a mesh body around the frame forming a cup shape, and is embedded in the oil supply port. After installing this kind of coarse filter at the oil supply port, insert the oil supply hose to supply oil, so that impurities can be intercepted by the mesh body.

However, after such a strainer is installed at the oil supply port, the liquid level in the oil tank cannot be recognized from the outside when the oil is supplied. In this regard, the structure disclosed in Patent Document 1 or Patent Document 2 is known. A buoy for an oil level gauge that floats up with the rise of the liquid level is provided on the strainer, and the oiler is allowed to observe the rise of the buoy. It can be judged that the liquid level has reached the appropriate position. Specifically, the structure disclosed in Patent Document 1 is that the buoy that floats up with the rise of the liquid level is supported in the strainer body so that it can be raised and lowered, and the structure disclosed in Patent Document 2 is that the spherical float that is installed on the rod can be lifted It is supported on the outside of the primary filter body and floats up with the rise of the liquid level.

[Patent Document 1] Utility Model No. 2508286

[Patent Document 2] Patent No. 3147688

However, the strainer disclosed in the above-mentioned Patent Document 1 has the problem that since the buoy is supported on the inside of the strainer body, when the oil supply hose is inserted to supply oil, the flow of oil will hit the buoy, and the buoy will be lost. Stability and move up and down, so that the height of the liquid level cannot be accurately detected.

In addition, there is such a problem in the strainer disclosed in the above-mentioned Patent Document 2 that although the buoy is supported outside the strainer body, it can prevent the oil from directly hitting the buoy during oil supply like the structure of Patent Document 1, but due to the coarse The peripheral wall of the filter is formed of a net body, so the flow of oil during oil supply will hit the buoy (especially the spherical floating part in the externally exposed state) after passing through the net body, and as a result, even if the oil reaches the reference liquid level , The buoy also cannot accurately detect the height of the liquid surface due to loss of stability.

Contents of the invention

The present invention is proposed focusing on this problem, and its purpose is to provide a strainer for an oil supply port that can prevent the flow of oil from hitting the buoy during oil supply, thereby accurately detecting the height of the liquid level.

In order to solve the above-mentioned problems, the strainer for the oil supply port according to the present invention has a main body, a guide hole vertically provided on the main body, and an oil filter inserted into the guide hole and freely moving in the vertical direction. The buoy of the level gauge is characterized in that, at least when the oil reaches the reference liquid level, the lower end of the buoy is received in the above-mentioned guide hole.

According to the above-mentioned structure, when the coarse filter for the oil supply port is installed in the oil supply port of various heavy machinery, and then the oil supply hose is inserted to supply oil, the above-mentioned buoy is initially positioned at the lowest end of the guide hole. As the amount of oil increases, after the buoy is immersed in its liquid surface, it will rise under the action of its buoyancy. The buoy moves upward under the action of buoyancy. At least when the oil reaches the reference liquid level, the buoy will become the state received in the guide hole. Therefore, it will no longer be affected by the flow of oil during oil supply, so that it can accurately The height of the liquid surface is detected.

According to the strainer for the oil supply port of the present invention, when the oil is supplied, the flow of the oil can prevent the oil from hitting the float for the oil level gauge after the oil reaches the reference liquid level. face height.

According to the strainer for the oil supply port of the present invention, since the buoy for the oil level gauge is inserted into the guide hole formed in the hollow shape of the frame body constituting the strainer body, it can be smoothly installed with respect to the oil supply port, and at the same time, it can prevent When installing or oiling, damage the guide hole or buoy part formed on the frame body.

Description of drawings

Fig. 1 is a figure showing the first embodiment of the strainer involved in the present invention, which is a longitudinal sectional view of the strainer;

Fig. 2 is a sectional view along the A-A line of Fig. 1;

Fig. 3 is a longitudinal sectional view showing a state in which the strainer shown in Fig. 1 is installed in the oil inlet;

Fig. 4 is a longitudinal sectional view showing a state in which the oil level rises after the strainer is installed in the oil inlet;

5( a ) and ( b ) are diagrams showing configuration examples of buoys, respectively.

6 is a diagram showing a second embodiment of the strainer according to the present invention, which is a longitudinal sectional view of the strainer;

Fig. 7 is a sectional view along the B-B line of Fig. 6;

Fig. 8 is a longitudinal sectional view showing a state in which the strainer shown in Fig. 6 is installed in the oil inlet;

Fig. 9 is a longitudinal sectional view showing a state in which the oil level rises after the strainer is installed in the oil inlet;

10 is a diagram showing a third embodiment of the strainer according to the present invention, which is a longitudinal sectional view of the strainer;

Fig. 11 is a sectional view along the C-C line of Fig. 10;

Fig. 12 is a longitudinal sectional view showing a state in which the strainer shown in Fig. 10 is installed in the oil inlet;

Fig. 13 is a longitudinal sectional view showing a state in which the oil level rises after the strainer is attached to the oil inlet.

Fig. 14 is a diagram showing a fourth embodiment of the strainer according to the present invention, which is a longitudinal sectional view of the strainer;

Fig. 15 (a) is a sectional view along the D-D line of Fig. 14, and Fig. 15 (b) is a sectional view along the E-E line of Fig. 14;

Fig. 16 is a longitudinal sectional view showing a state in which the strainer shown in Fig. 14 is installed in the oil inlet;

Fig. 17 is a longitudinal sectional view showing a state in which the oil level rises after the strainer is attached to the oil inlet.

Detailed ways

Embodiments of the strainer for an oil inlet according to the present invention will be specifically described below with reference to the drawings.

1 to 5 are diagrams showing the first embodiment of the strainer involved in the present invention, Fig. 1 is a longitudinal sectional view of the strainer, Fig. 2 is a sectional view along line A-A of Fig. 1 , Fig. 3 is a view showing the 1 shows a longitudinal sectional view of the state in which the strainer is mounted on the oil supply port, and FIG. 4 is a longitudinal sectional view showing a state in which the oil level rises after the strainer is mounted on the oil supply port (the state of the reference liquid level), 5( a ), ( b ) are diagrams showing configuration examples of buoys, respectively.

The body 1 of the strainer is formed in a bottomed cylindrical shape (approximately cup-shaped) with an upper opening. Cylindrical. The main body 1 has a frame body 3 for maintaining its own rigidity and preventing damage; and a net part 5 (including a substantially net-shaped part) for filtering impurities while allowing oil to penetrate into the fuel tank. Here, the frame body 3 is formed by the following parts: the upper frame 3a extends downward from the edge of the oil inlet to a predetermined length, and is formed in a cylindrical shape; the bottom frame 3b is formed of a circular frame as shown in FIG. It is formed with a cross-shaped frame erected therein; a plurality of vertical frames 3c are connected to the above two frames, and are arranged in the up-and-down direction (from the opening to the bottom) of the strainer body 1 at substantially the same intervals; and a transverse The frame 3d connects the vertical frames 3c in the circumferential direction at approximately the middle position of the vertical frames 3c. In addition, the transverse frame may be formed in multiples, or may not be formed at all. At the opening position of the upper end of the upper frame 3a, a flange 3e is formed, bulges outward in the radial direction, and engages with the oil inlet 21 of the oil tank 20. As shown in FIG. In addition, the net part 5 is covered between these frames to form the peripheral wall or the bottom wall of the main body 1 .

Among the plurality of frames constituting the above-mentioned frame body 3, when mounted on the oil supply port 21, the vertical frame 3c is formed in a state extending in the axial direction (vertical direction) of the main body 1, and is integrally formed. A hollow guide hole 7 with upper and lower openings. The vertical frame 3c is formed in a tubular shape. In the guide hole 7, a buoy 10 for an oil level gauge is inserted from the upper opening 7a. The buoy 10 can move freely up and down, and can be pulled out.

Here, the guide hole 7 extends vertically from the upper part to the bottom of the prefilter body 1 along the axial direction of the bulging part 3c' formed by bulging toward the inside of the prefilter body 1 in a substantially cylindrical shape in one longitudinal frame 3c. The direction is formed as a circular cross-section with substantially the same diameter in the longer direction, and its diameter is larger than that of the buoy so that the inserted buoy 10 can move up and down. In addition, the portion where the guide hole 7 is formed may be the above-mentioned portion of the longitudinal frame 3c, or may be formed by bulging inward or outward relative to the peripheral wall of the main body 1 at a position different from the position where the vertical frame is arranged. , or formed on the bulging part that bulges inwardly and outwardly, and can also be formed separately from the prefilter body 1 .

The main body 1 of the prefilter composed of the frame body 3 having the guide holes and the mesh portion 5 can be integrally formed with materials such as synthetic resin or metal. Alternatively, the frame body 3 and the mesh portion 5 are formed separately, and then the mesh portion 5 is mounted on the frame body 3 by bonding or other methods.

The buoy 10 is formed as a hollow rod-shaped member with a circular (cylindrical) cross-section by casting, with a thin rod portion 10a on its upper side and a buoyant buoy portion 10b on its lower side with a large diameter. Here, the rod part 10a and the buoy part 10b may be formed in a hollow shape as a whole, or may be formed so that a part of the rod part 10a is solid as shown in FIG. 5( b ), for example. Alternatively, instead of forming the hollow portion, it may be formed with a foam, or integrally formed with a material having a specific gravity lighter than that of the supplied oil. In addition, for the outside of the buoy 10, it is preferable, for example, as shown in FIG. The position corresponding to the upper opening of the hole 7 is marked with S2 mark or the like so that the maximum oil storage capacity (reference liquid level) specified in the heavy machinery used can be recognized.

The buoy 10 can be inserted into the upper opening of the guide hole 7 with the buoy part 10b on the lower side, and then inserted into the guide hole, and a stopper 10c protruding in the circumferential direction is formed on its upper end so as to contact the opening 7a of the guide hole and prevent it from falling off. In addition, the length of the buoy 10 can be shorter than the axial length of the guide hole 7, or can be made longer as shown in FIG. However, as shown in Figure 3, for the case where the lower end of the buoy 10 protrudes from the opening 7b for a longer length, the length should be formed such that the lower end of the buoy 10 can receive the guide hole 7 after the oil level rises. degree of internalization. Specifically, any length may be sufficient as long as the lower end of the float 10 can be received in the guide hole 7 at least when the oil reaches the reference liquid level.

As shown in FIG. 3 , the strainer constructed as above, after removing the cover for the oil supply port (not shown), the main body 1 is inserted into the oil supply port 21 of the oil tank 20 to fit it together. At this time, the flange 3e formed at the opening position of the upper end of the upper frame 3a is engaged with the receiving portion 21a of the oil supply port 21 . Then, in this state, a lubricating hose (not shown) is inserted into the upper opening of the main body 1 to perform lubricating.

Here, since the buoy 10 is inserted into the tubular guide hole 7 formed on the frame body 3, it does not come into contact with the inner peripheral surface of the oil supply port 21 or the oil supply hose, thereby preventing the main body 1 from being obstructed. Insertion or damage during oiling, etc. That is, the prefilter main body can be smoothly installed into the oil supply port 21 .

Then, along with refueling, the liquid level position in the oil tank rises, and when the liquid level passes through the opening 7b of the lower end of the guide hole 7 and hits the lower end of the buoy part 10b of the buoy 10, the buoy 10 just begins to rise, as shown in Figure 4 It can be identified that the specified reference liquid level has been reached by means of the color distinction and marks marked on the buoy 10, so as to stop the oil supply. At this time, after the float part 10b starts to rise, its lower end will be received in the guide hole 7, so the float 10 is no longer affected by the flow of oil, so that it can rise in a stable state, and when the oil reaches the reference liquid level, The lower end of the buoy 10 (the buoy part 10b) is still received in the guide hole, which can prevent the flow of oil during refueling from directly hitting the buoy 10, so that the height of the liquid surface can be accurately detected. After that, press the buoy 10 to cover the cover of the oil supply port 21, so that the buoy 10 is kept in the body in a state of being located in the guide hole 7.

According to the above-mentioned structure, the buoy 10 can be pulled out, so only the buoy can be easily replaced, and the stopper 10c protruding in the direction of the outer circle is formed at the upper end, so the buoy will not be damaged due to the reduction of the amount of oil in the tank. drop into the fuel tank.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are assigned to the same components as those in the above-mentioned first embodiment, and detailed descriptions are omitted.

6 to 9 are diagrams showing a second embodiment of the strainer involved in the present invention, FIG. 6 is a longitudinal sectional view of the strainer, FIG. 7 is a cross-sectional view along line B-B of FIG. 6 , and FIG. 6 shows a longitudinal sectional view of the state where the strainer is installed in the oil supply port, and Fig. 9 is a longitudinal sectional view showing the state after the strainer is installed in the oil supply port and the oil level rises (the state of the reference liquid level) .

As in the above-mentioned embodiment, on one frame of the longitudinal frame 3c among the plurality of frames constituting the frame body 3, a bulging portion 3f that bulges out in a semi-cylindrical shape toward the inside of the prefilter body 1 is formed, and is integrated here. A hollow guide hole 7 with an upper opening is formed. Then, in this guide hole 7, a float 10 for an oil level gauge that can be freely moved up and down and can be pulled out is inserted from the upper opening 7a. Here, at the lower end of the swollen portion 3f, a bottom 12 is formed to restrict the movement of the buoy 10 so that it cannot move downward. In addition, a plurality of opening holes 13 communicating with the guide hole 7 are formed on the outer side and the bottom of the bulging portion 3 f forming the guide hole 7 so that oil can freely flow into the guide hole 7 .

In the strainer constructed as above, as shown in FIG. 8 , after removing the cover for the oil supply port (not shown), the main body 1 is inserted into the oil supply port 21 of the oil tank 20 to fit it together. Oil is supplied in this state, and when the liquid level in the oil tank 20 rises, the oil flows into the guide hole 7 through the plurality of opening holes 13 formed on the bottom 12 of the guide hole 7 and the bulge 3f. Then, the buoy 10 starts to rise, as shown in Figure 9, it can be recognized that the specified reference liquid level has been reached by means of the color distinctions and marks marked on the buoy 10.

According to this structure, since the buoy 10 is completely received in the guide hole 7, the buoy 10 will not be directly affected by the flow of oil, but will rise in a stable state, so that when the oil reaches the reference liquid level, it will also rise. Can accurately detect the height of the liquid level. In addition, in the above-mentioned configuration, the position, number, and size of the opening holes 13 formed in the bulging portion 3f can be appropriately changed. In addition, instead of the open hole, a notch for exposing the buoy 10 to the outside of the prefilter body 1 may be formed in the middle portion.

10 to 13 are diagrams showing a third embodiment of the strainer involved in the present invention, FIG. 10 is a longitudinal sectional view of the strainer, FIG. 11 is a cross-sectional view along line C-C in FIG. 10 , and FIG. 10 shows a longitudinal sectional view of the state where the strainer is installed in the oil supply port, and Fig. 13 is a longitudinal sectional view showing the state after the strainer is installed in the oil supply port and the oil level rises (the state of the reference liquid level) .

As in the above-mentioned embodiment, one of the longitudinal frames 3c among the plurality of frames constituting the frame body 3 is formed with a bulging portion 3g that bulges outward in a semi-cylindrical shape, and here, a bulging portion 3g is integrally formed in the vertical direction. Hollow shape, the guide hole 7 of top opening. In this guide hole 7, a float 10 for an oil level gauge that can be freely moved up and down and can be pulled out is inserted from an upper opening 7a. The length of the bulging portion 3g forming the guide hole is such that the lower end of the buoy 10 is exposed from the lower end opening 7b of the guide hole 7 when the stopper 10c formed on the upper end of the buoy 10 hits the opening 7a of the guide hole 7 Come. Specifically, its length is when the oil reaches the vicinity of the reference liquid level, the lower end of the buoy 10 can be received in the guide hole. In addition, on the bulging portion 3g forming the guide hole 7, on its outer side, a plurality of opening holes 13 communicating with the guide hole 7 are formed, so that oil can freely flow into the guide hole 7 (since the oil can flow from the guide hole 7 The lower end opening 7b flows in, so the above-mentioned opening hole 13 may not be formed).

As shown in Fig. 12, after removing the cover for the oil supply port not shown in the strainer constructed as above, the main body 1 is inserted into the oil supply port 21 of the fuel tank 20 to fit it together. Oil is supplied in this state, and when the liquid level in the oil tank 20 rises, the oil flows into the guide hole 7 through the lower end opening 7b of the guide hole 7 and the plurality of opening holes 13 formed outside the bulge 3g, so that Once, the buoy 10 starts to rise, as shown in FIG. 13 , with the help of the color distinctions and marks marked on the buoy 10, it can be recognized that the specified reference liquid level has been reached.

In this configuration, although the lower end (float portion 10b) of the float 10 protrudes outside from the guide hole 7 when oil supply starts, it rises as the oil level rises, and when it reaches the reference level, it becomes The lower end of the buoy 10 is in the state of being received in the guide hole 7, so it will not be affected by the flow of oil, so that the height of the liquid surface can be accurately detected.

14 to 17 are diagrams showing a fourth embodiment of the strainer according to the present invention. FIG. 14 is a longitudinal sectional view of the strainer, and FIG. 15( a) is a cross-sectional view along line D-D in FIG. 14 , and FIG. b) is a sectional view along the line E-E of FIG. 14, and FIG. 16 is a longitudinal sectional view showing the state in which the coarse filter shown in FIG. , a longitudinal sectional view of the state after the oil level has risen (the state of the reference liquid level).

As in the above-mentioned embodiment, one of the longitudinal frames 3c among the plurality of frames constituting the frame body 3 is formed with a bulging portion 3h that bulges inward in a substantially semi-cylindrical shape, and is integrally formed here in the vertical direction. A hollow-shaped, top-opening guide hole 7 is provided. In this guide hole 7, a float 10 for an oil level gauge that can be freely moved up and down and can be pulled out is inserted from an upper opening 7a. At the lower end of the bulging portion 3h forming the guide hole, there is a nozzle 15 for accommodating the lower end region of the buoy 10, which is integrally formed with the bottom frame 3b, protrudes from the bottom frame, and hits against a stopper 10c formed at the upper end of the buoy 10. In the state of the opening 7a of the guide hole 7, the lower end of the buoy 10 can be received in the nozzle. Here, a guide hole 7 is provided in the nozzle 15, and an opening 15a is formed at the lower end thereof, through which oil flows into the guide hole 7. As shown in FIG. In addition, in the bulging portion 3 h where the guide hole 7 is formed, a plurality of opening holes may be formed on the outer side thereof to communicate with the guide hole 7 as in the above-mentioned embodiment.

In the strainer constructed as above, as shown in FIG. 16 , the main body 1 is inserted into the oil supply port 21 of the fuel tank 20 after the cover for the oil supply port (not shown) is removed and fitted together therewith. Oil is supplied in this state, and when the liquid level in the oil tank 20 rises, the oil flows into the guide hole 7 through the lower end opening 15a of the nozzle 15, so that the buoy 10 starts to rise, as shown in Figure 17, With the help of color distinctions, marks, etc. marked on the buoy 10, it can be recognized that the specified reference liquid level has been reached.

According to this structure, the flow of oil does not touch the buoy 10 until the oil level reaches the buoy 10, so damage to the buoy 10 can be prevented. In addition, the buoy 10 is not affected by the flow of oil, so it can be stably The state of the oil rises, and when the oil reaches the reference liquid level, it can also accurately detect the height of the liquid level. In addition, even if the reference liquid level of the oil is lower than the strainer body 10, it can be applied as long as the nozzle 15 is properly extended downward.

Embodiments of the present invention have been described above, but the prefilter according to the present invention is not limited to the configuration shown in the drawings, and various changes can be made.

For example, the shape of the frame body 3 may be generally formed into a cup shape as a whole, and the configuration of the frames constituting the frame body may be appropriately changed. In addition, the guide hole 7 can also be a simple structure, as long as it can guide the buoy in the up and down direction, or it can be connected with the frame. The bodies 3 are separately formed, or may be a structure mounted on the body 1 . In addition, regarding the guide hole 7, the shape, axial length, thickness, number, etc. of the hole can be appropriately changed. 10 Just move up and down steadily. In addition, the shape and constituent material of the buoy 10 may be appropriately changed, for example, it may be configured so that it cannot be pulled out from the guide hole 7 .

The mesh portion includes all structures formed in a mesh shape other than the mesh portion, and also includes all structures having the same function as the mesh portion. For example, a structure provided with a plurality of holes to filter impurities is included in the mesh portion. In addition, the hole can be formed in various sizes and shapes.

Claims (8)

1. coarse filter for oil feeder mouth has:

The mesh portion of impurity screening;

In order to support this mesh portion along perisporium be provided with the framework body, described framework body forms cup shape substantially, and its top has opening;

By the longitudinal bent that makes above-mentioned framework body form hollow shape and vertically form, to the guide hole of perisporium upper opening; With

Can be inserted in the buoy that the fuel level gage in this guide hole is used with vertically moving freely.

2. coarse filter for oil feeder mouth according to claim 1, wherein:

Above-mentioned guide hole side up has opening, and above-mentioned buoy can be inserted in the guide hole the inside from above-mentioned opening, and can extract.

3. according to claim 1 or the described coarse filter for oil feeder mouth of claim 2, wherein:

Above-mentioned buoy has the block that contacts with the opening of guide hole in the top.

4. coarse filter for oil feeder mouth according to claim 1, wherein:

Above-mentioned guide hole is formed on the peripheral part of framework phosphor bodies.

5. coarse filter for oil feeder mouth according to claim 1, wherein:

At least a portion of above-mentioned buoy is hollow.

6. coarse filter for oil feeder mouth according to claim 1, wherein:

The different parts color difference of above-mentioned buoy.

7. coarse filter for oil feeder mouth according to claim 1, wherein:

The longitudinal bent that is formed with guide hole bloats formation.

8. coarse filter for oil feeder mouth has:

Main body;

The guide hole that on main body, vertically forms;

The buoy that is inserted in this guide hole the inside and freely moves in vertical direction; With

Be supported on the main body, filter the mesh portion of the impurity in the oil that is injected into main body;

Aforementioned body comprises: inject the opening and the wall portion of oil, above-mentioned wall portion defines guide hole at least in part, and opening is separated with guide hole, and oil mobile run into buoy when preventing oil supply;

Guide hole forms the opening that extends to main body wall top;

Mesh portion comprises bottom wall portion and side wall portion at least.

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