JP4069663B2 - Element exchange type oil filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an element exchange type oil filter. More specifically, the present invention relates to an element exchange type oil filter having a drain structure for preventing oil extracted from an oil filter from being scattered around when exchanging a filter element for filtering engine oil.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known an element exchange type oil filter that quickly discharges oil remaining inside an oil filter when the filter element is exchanged.
As an example of this, Japanese Patent Application Laid-Open No. 10-202015 discloses a filter case having a bottomed cylindrical shape in which a filter element is detachably housed and having an external thread formed on the outer peripheral portion on the opening end side. This is a configuration in which a male screw and a female screw are screwed together and attached to a case mounting portion where a female screw is formed, and an oil discharge channel (drain) is formed by a notch formed in the filter case and a notch formed in the case mounting portion. An element exchange type filter is disclosed in which a groove) is formed and oil in the filter is quickly discharged.
[0003]
[Problems to be solved by the invention]
However, in the invention described in the publication, when the oil is discharged, the momentum of the oil discharged from the oil discharge passage differs depending on whether the remaining amount of oil in the filter is large or small. When the remaining amount of oil is large, the momentum of the discharged oil is strong and the oil is scattered at a position away from the case mounting portion. Thereafter, the remaining amount of oil in the filter gradually decreases, and the scattering position comes closer to the case mounting portion. These are particularly noticeable when the filter is installed horizontally.
[0004]
Usually, the extracted oil is accommodated in an oil tray disposed below the filter. However, since the momentum of the discharged oil gradually weakens, the position where the oil scatters is different, and the oil tray must be enlarged or the oil tray must be moved while the oil is being discharged. there were.
[0005]
The present invention has been made to solve the above problems, and an object of the present invention is to provide an element exchange type oil filter having a drain structure capable of easily regulating a dropping position of discharged oil.
[0006]
[Means for Solving the Problems]
Therefore, in the element exchange type oil filter according to the present invention, the notch formed in the outer peripheral part of the filter case and the notch formed in the axial direction on the inner peripheral part of the cylindrical case attaching part are matched, In an element exchange type oil filter that extracts oil, a housing portion that protrudes radially outward at the entire circumference of the outer peripheral portion of the filter case and contacts the open end of the cylindrical case attachment portion in the attached state is provided. In addition, a convex portion that protrudes radially outward from the outer diameter of the cylindrical case attachment portion is provided on the outer peripheral portion of the housing portion at a position corresponding to the notch of the filter case. When the notches of the filter case and the notches of the case mounting portion are matched with each other, the convex portions regulate the direction of oil dripping from these notches .
[0007]
【The invention's effect】
According to the present invention, when the remaining amount of oil inside the filter is large and the momentum of the extracted oil is strong, the oil hits the convex part of the filter case and the dropping direction is restricted, so that the oil is scattered around. There is an effect that can be prevented. Furthermore, there is an effect that the notch of the case attaching portion and the notch portion on the filter case side can be easily aligned using the convex portion as a mark when oil is extracted.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the scope of the present invention is not limited to the embodiments described below.
FIG. 1 is a perspective view of an element exchange type oil filter 1 according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof. 3A and 3B show a case mounting portion, where FIG. 3A is a front view and FIG. 3B is a side view. FIG. 4 is a filter case, (A) is a plan view, and (B) is a front view.
[0009]
The filter 1 is roughly composed of a case mounting portion 3 integrated with an engine cylinder block, a bottomed cylindrical filter case 5, and a filter element 7 housed inside the filter 1. 1 and 2, the filter case 5 is shown fastened to the case mounting portion 3.
The case mounting portion 3 is formed in a cylindrical shape so as to surround a part of the outer wall of the cylinder block of the engine as a bottom wall, and a cylinder protruding toward the filter case 5 is formed at the center of the bottom wall. A protruding portion 9 is formed. A through-hole 11 communicating with the engine side is formed in the projecting portion 9 and constitutes an inlet side oil passage through which dirty oil discharged from the engine side flows.
[0010]
A through hole 13 for reducing oil that has passed through a filter element 7 (described later) to the engine side is formed on the radially outer side of the projecting portion 9 to constitute an outlet side oil passage. In the present embodiment, four outlet-side oil passages 13 are formed at predetermined intervals in the circumferential direction.
A female screw 17 is formed on the inner periphery of the case mounting portion 3, and a case mounting portion side cutout 19 is formed with a predetermined width by cutting the female screw 17 in the axial direction. In the present embodiment, one case mounting portion side cutout 19 is formed (see FIG. 3A). A sealing surface 20 is formed on the inner end of the case mounting portion 3 on the opening end side from the female screw 17.
[0011]
The filter case 5 has a bottomed cylindrical shape in which the filter element 7 is detachably accommodated, and a male screw 21 is formed on the outer peripheral portion on the opening end side. The filter case 5 is attached to the case attaching portion 3 with the male screw 21 screwed into the female screw 17 of the case attaching portion 3 described above.
At the center of the bottom of the filter case 5, a cylindrical boss portion 22 is formed to have a size substantially the same as the outer diameter of the protruding portion 9 so as to protrude toward the case mounting portion 3.
[0012]
The filter element 7 is hollow and has a substantially cylindrical shape, is fitted into the boss portion 22, and is housed in the filter case 5. When the filter case 5 is fastened to the case attachment portion 3, the filter element 7 is in a state of being inserted into the protruding portion 9.
A filter case-side cutout 23 having a male screw 21 cut out in the axial direction is formed on the outer periphery of the filter case 5 with a predetermined width. In the present embodiment, one filter case side cutout 23 is formed (see FIG. 4).
[0013]
A circumferential groove 25 is formed on the bottom side of the outer peripheral portion of the filter case 5 from the male screw 21, and an O-ring 27 serving as a seal member is accommodated in the groove 25. As shown in FIG. 2, when the case attachment portion 3 and the filter case 5 are in a fastened state, the O-ring contacts the seal surface 20 of the case attachment portion 3 to ensure a liquid-tight state.
[0014]
On the bottom side of the groove 25 of the filter case 5, a housing part 29 that contacts the other end of the case mounting part 3 is formed so as to protrude radially outward.
Further, a convex portion 31 is formed so as to protrude outward in the radial direction of the housing portion 29. The convex portion 31 is formed at substantially the same position in the circumferential direction as the position where the filter case side cutout 23 is formed. The lateral width of the convex portion 31 is formed wider than the width of the notch 19 of the case attaching portion 3.
[0015]
A substantially plate-like convex portion 15 is formed on the outer periphery of the case attachment portion 3 so as to protrude outward in the radial direction. In the present embodiment, the convex portion 15 is formed so as to protrude downward in the vertical direction, and a dropping portion 15a that protrudes further downward is formed on the filter case 5 side.
About the filter 1 provided with the above structure, the oil which circulates the inside of the filter 1 is demonstrated.
[0016]
Usually, the dirty oil sent from the engine side is supplied into the filter 1 from the inlet side oil passage 11 and is filtered by the filter element 7. The filtered oil flows from the outer periphery of the filter element 7 into the outlet side oil passage 13 and is reduced to the engine side.
If the filter element 7 is used for a long period of time, dust or the like accumulates inside, and the filter element 7 must be replaced. In that case, the filter case 5 is removed from the case mounting portion 3 and the filter element 7 is replaced. However, since oil remains in the filter 1, it must be discharged to the outside. .
[0017]
In the following, explanation will be given when oil is extracted from the filter 1.
FIG. 5 is a perspective view showing a state in which the filter case 5 is loosened from the case attaching portion 3, and FIG. 6 is a cross-sectional view thereof. 7 and 8 are side views showing a state in which the extracted oil is dropped.
1 and 2, the filter case 5 is in a state of being screwed onto the case attachment portion 3, and is loosened from the case attachment portion 3 with a removal tool or the like (not shown). At this time, the oil discharge passage 45 is configured at a position where the O-ring 27 is detached from the case attachment portion 3 and the notch 19 of the case attachment portion 3 and the notch 23 of the filter case 5 overlap in the circumferential direction. The oil remaining inside the filter 1 is discharged to the outside.
[0018]
Immediately after the flow path 45 is configured and the extracted oil begins to be discharged, the remaining amount of oil in the filter 1 is large, and the oil is discharged from the flow path 45 to the filter case 5 side. As described above, the notch 23 and the convex portion 31 of the filter case 5 are formed at the same position in the circumferential direction of the filter case 5, so that the oil discharged from the flow path 45 is the convex portion 31 of the filter case 5. And is dropped vertically downward (see FIG. 7). This can prevent the oil from scattering to the other end side of the convex portion 31.
[0019]
If the oil is continuously discharged, the remaining amount of oil in the filter 1 gradually decreases, and the momentum of the discharged oil gradually decreases. When the oil no longer hits the convex portion 31, the oil flows downward between the convex portion 15 and the convex portion 31. Further, when the momentum of the oil decreases, the oil drops along the convex portion 15 (see FIG. 8). The convex portion 15 is formed below the outer peripheral portion of the notch 19 of the case attachment portion 3, and the dropping portion 15 a drops the oil vertically downward, so that the oil may drop on other parts and the like. The oil discharge position is regulated within a predetermined range.
[0020]
Therefore, it is possible to drop the oil to be discharged within a predetermined range regardless of the remaining amount of oil in the filter 1, and the oil tray may be disposed at an appropriate position. After the oil has been discharged, the filter case 5 is removed from the case mounting portion 3, the filter element 7 is replaced, and the filter case 5 is fastened to the case mounting portion 3 again.
[0021]
According to the present embodiment, since the convex portion 31 is configured to be larger than the cross section of the notch 19 on the case attachment portion 3 side, the remaining amount of oil in the filter 1 is large and the momentum of the extracted oil is strong. In addition, there is an effect that the dropping direction can be regulated by reliably applying the oil to the convex portion 31.
Moreover, according to this embodiment, since the 2nd convex part 15 which controls the dripping direction of oil was provided in the outer peripheral part of the case attaching part 3, the remaining amount of oil inside the filter 1 was extracted with little oil. When the momentum is weak, the oil dropping direction is regulated by the convex portion 15, so that the wiping operation can be facilitated and the oil can be prevented from dripping onto the components around the filter 1.
[0022]
Further, according to the present embodiment, the notch 19 on the case attaching portion 3 side is formed on the lower side in the vertical direction, and the notch 23 on the filter case 5 side and the notch 19 on the case attaching portion 3 side are provided. When matched, the second convex portion 15 is formed on the lower side in the vertical direction, so that the remaining amount of oil in the filter 1 gradually decreases, and the momentum of the extracted oil weakens Moreover, oil can be dripped along the 2nd convex part 15, and there exists an effect that dripping to the components of the filter 1 periphery can be prevented. Further, when the oil is extracted, the notches 19 of the case attaching portion 3 and the notches 23 on the filter case 5 side are easily formed using the convex portion 15 of the case attaching portion 3 and the convex portion 31 of the filter case 5 as marks. There is an effect that it can be adjusted to.
[0023]
Further, according to the present embodiment, the notch 19 on the case attaching portion 3 side is formed on the lower side in the vertical direction, the notch 23 on the filter case 5 side, and the notch 19 on the case attaching portion 3 side. Since the convex portion 31 of the filter case 5 is formed on the lower side in the vertical direction, the remaining amount of oil in the filter 1 decreases, and the momentum of the extracted oil gradually weakens. Also, there is an effect that the oil dripping position can be regulated within a predetermined range.
[Brief description of the drawings]
1 is a perspective view of an element exchange type oil filter. FIG. 2 is a cross-sectional view of an element exchange type oil filter. FIG. 3 is a front view of a case attachment part. 4A is a plan view of the filter case, and FIG. 5B is a front view of the filter case. FIG. 5 is a perspective view showing a state where the filter case is loosened from the case mounting portion. FIG. 7 is a side view showing a state where the extracted oil is being dropped. FIG. 8 is a side view showing a state where the extracted oil is being dropped.
DESCRIPTION OF SYMBOLS 1 Filter 3 Case attachment part 5 Filter case 7 Filter element 11 Inlet side oil path 13 Outlet side oil path 15 Convex part 17 Female thread 19 Case attachment part side notch 21 Male screw 23 Filter case side notch 29 Housing part 31 Convex part 45 Oil Discharge channel

Claims (5)

A filter case in which the filter element is detachably accommodated inside, and a filter case with a male thread formed on the outer peripheral part on the open end side is attached to a case mounting part that is cylindrical and has a female thread formed on the inner peripheral part. , The male screw and the female screw are screwed together and attached.
An element exchange type oil filter for extracting oil by matching a notch formed in the axial direction on the outer peripheral portion of the filter case with a notch formed in the axial direction on the inner peripheral portion of the case mounting portion. In
A housing part that protrudes radially outward in the entire circumference of the outer periphery of the filter case, and abuts against the open end of the cylindrical case attachment part in the attached state;
At the outer peripheral portion of the housing portion, it protrudes radially outward from the outer diameter of the cylindrical case mounting portion at a position corresponding to the notch of the filter case , and when the two notches are matched, these notches are cut. An element exchange type oil filter provided with a convex portion for restricting the direction of oil dripping from a notch. The element exchange type oil filter according to claim 1, wherein the convex part is larger than a cross section of the cutout on the case attachment part side. 3. The element exchange type oil filter according to claim 1, wherein a second convex portion that regulates an oil dropping direction is provided on an outer peripheral portion of the case attaching portion. The notch on the case attaching part side is formed in the lower side in the vertical direction, and when the notch on the filter case side and the notch on the case attaching part side are matched, the second convex part is vertical. 4. The element exchange type oil filter according to claim 3, wherein the element exchange type oil filter is formed on the lower side in the direction. The cutout on the case attachment portion side is formed in the vertical direction on the lower side, and when the cutout on the filter case side and the cutout on the case attachment portion side are matched, the convex portion of the filter case is vertical The element exchange type oil filter according to any one of claims 1 to 4, wherein the element exchange type oil filter is formed on a lower side in a direction.

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