JPH053750U - Valve device for filter element for oil filter - Google Patents

Abstract

(57) [Summary] [Purpose] In a relief valve and a check valve mounted on a filter element of an oil filter used for a lubrication system of an internal combustion engine, the flow passage resistance is not increased and the mounting is easy.
Further, the present invention provides a valve device that does not close the flow path when the valve is opened. [Structure] A cylindrical body 15 having a central opening 19 at the upper end and a bottom plate 21 having a cylindrical portion 22 at the center and an inflow port 25 around the cylindrical body 22 are integrally fixed on the outer periphery, and a spring 18 is provided inside thereof. The valve element 16 and the valve element 17 were arranged via the. The valve opening pressure with the valve bodies 16 and 17 is set by the opening areas of the central opening 19 and the inflow port 25. A connecting rod 31 is erected at the center of the valve body 16 and has a stopper plate 16 at its tip.
Is fixed. When the oil pressure increases, the stroke of the valve element 16 is limited.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present application relates to a valve device of a filter element used in, for example, a cartridge type oil filter used in an internal combustion engine.

[0002]

[Prior Art]

 An oil filter used in an internal combustion engine has a structure in which a filter element is arranged in a casing as disclosed in, for example, Japanese Utility Model Publication No. 50-31995 and Japanese Utility Model Publication No. 51-16536. Such a filter element is provided with a check valve for preventing oil on the clean side of the filter element from flowing down to the oil pan when the engine is stopped. On the other hand, a filter of this type is separately provided with a relief valve for allowing the oil to escape to the dirty side without flowing through the filter element when the oil pressure exceeds a predetermined value. When the check valve and the relief valve are provided in the filter element, the common sense will be as shown in FIG. That is, the filter paper body 2 folded in a chrysanthemum shape is arranged around the perforated cylinder 1, and the upper and lower end plates 3 and 4 are fixed to the upper and lower ends thereof to be integrated. A relief valve 8 having a valve body 6 and a spring 7 arranged in a valve case 5 is provided in the central portion of the upper end plate 3, and a valve body 10 in a valve case 9 is provided in the central portion of the lower end plate 4. A check valve 12 including a spring 11 and a spring 11 is provided.

Such a filter element is arranged in a casing for use. The oil flows through the filter paper body 2 to reach the inside of the perforated cylinder 1, opens the check valve 12, and flows out from the central portion of the lower end plate 4. When the oil pressure rises above a predetermined value, the relief valve 8 opens, and the oil flows out from the central portion of the lower end plate 4 without flowing through the filter paper body 2. When the engine is stopped, the oil in the perforated cylinder 1 is prevented from flowing down by the check valve 12. In this structure, the relief valve 8 and the check valve 12 are separate bodies, and when they are mounted, they are fixed to the upper and lower ends 3 and 4, respectively. Will narrow the oil flow path. Then, the flow resistance of oil will increase. Also, since the number of valves is two, the number of parts is increased and it takes time to mount the filter element. In addition, the spring set pressure must be determined separately. Therefore, as a solution to these drawbacks, the applicant group first applied for a structure as shown in FIG. 4 (Japanese Patent Application No. 2-405423). That is, a disc-shaped valve body 16 and a disc-shaped donut-shaped valve body 17 are arranged via a spring 18 in a cylindrical body 15 having one end opened and a central opening 19 provided at the other end. At the other end of 15, a bottom plate 21 having a cylindrical portion 22 in the center and an annular flat portion 23 having an inflow port 25 provided on the outer side thereof is fixed, and the central opening is disc-shaped valve body 16 The valve device is a valve device in which the inlet port 25 is closed by the disc-shaped donut-shaped valve body 17.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention This proposed solution solves the drawbacks of the above-mentioned known ones, but brings about the following new drawbacks. That is, when the oil pressure increases beyond the desired range, the disc-shaped valve body 16 may move down against the spring 18 and come into contact with the upper end of the cylindrical portion 22. . Then, most of the oil flow path is blocked, the oil supply is extremely reduced, and the function as the relief valve is stopped. [0005]

[Means for Solving the Problems]

 A disc-shaped valve body and a disc-shaped donut-shaped valve body are arranged via a spring in a cylinder with one end open and a central opening at the other end. A bottom plate with a tubular part and an annular flat part with an inflow port on the outside is fixed, the central opening is closed by a disc-shaped valve body, and the inflow port is closed by a disc-shaped donut-shaped valve body. A valve device was constructed by connecting a connecting rod to the disk-shaped central part and fixing a stop plate made of a plate piece to the tip of the connecting rod.

[0006]

[Action]

 When the valve device is attached to the filter element and the oil does not flow, the oil is blocked by the disc-shaped valve body. When the oil pressure exceeds a specified value, the valve body opens and the oil is released. Further, when the oil pressure increases, the stop plate comes into contact with the peripheral edge of the central opening to prevent the valve body from further descending.

[0007]

【Example】

 FIG. 1 shows an embodiment of a valve device of the present invention. A valve device 30 comprises valve bodies 16, 17 and a spring 18 arranged in a cylindrical body 15 having one end open. The cylindrical body 15 has a central opening 19 at the other end, and an annular recess 20 is provided around the central opening 19. A bottom plate 21 is fixed to one open end of the cylindrical body 15. The bottom plate 21 has a cylindrical portion 22 in the center thereof, and an annular flat portion 23 is formed on the outside thereof. The outer peripheral end of the bottom plate 21 is crimped to the outer periphery of one end of the cylindrical body 15, so that the bottom plate 21 and the cylindrical body 15 are integrated. The cylindrical portion 22 of the bottom plate 21 is provided with a plurality of outlets 24 at a position above the surface of the flat portion 23, and the flat portion 23 is provided with a plurality of inlets 25 on the same circumference. It is provided. The disc-shaped valve body 16 and the disc-shaped donut-shaped valve body 17 are pressed against the other end side of the cylindrical body 15 and the bottom plate 21 side by the spring 18. The valve body 16 contacts the outer periphery of the bottom plate of the annular recess 20 in a liquid-tight manner, and the valve body 17 abuts on the bottom plate 21 and closes the inflow port 25. The outlet 24 may not be provided. A connecting rod 31 is provided upright in the central portion of the valve element 16 so as to pass through the central opening 19, and a stopper plate 32 is fixed to the tip of the connecting rod 31. The stop plate 32 is composed of rectangular plate pieces 33 and 34 extending vertically and horizontally, and the length between both ends is larger than the inner diameter of the central opening 19.

As shown in FIG. 2, such a valve device 30 is attached to a filter element and used. That is, a filter body 27 such as an annular filter paper body of chrysanthemum fold filter paper is arranged around the perforated cylinder 26, and upper and lower end plates of the lower end plate 29 of the filter element in which upper and lower end plates 28 and 29 are fixed. An opening is provided in the central portion, the valve device 30 is inserted into the opening, and the outer periphery is fixed in a liquid-tight manner.

In FIGS. 1 and 2, the unclean oil flows through the filter body 27 from the outer circumference to the inner circumference, is filtered during this time, and flows into the perforated cylinder 26. The cleaned oil pushes down the valve body 16 of the valve device 30, enters the tubular body 15, and further flows out through the tubular portion 22 of the bottom plate 21.

When the oil pressure on the outer periphery of the filter body 27 rises to a predetermined value or more due to clogging of the filter body 27, unclean oil pushes up the valve body 17 of the bottom plate 21, and the inlet 25, the flow It flows out of the cylindrical portion 22 through the outlet 24. When the outlet 24 is not provided, it flows out from the cylindrical portion 22. Even if the oil supply is stopped, the oil in the perforated cylinder 26 is prevented from flowing down by the valve body 16. When the oil pressure or the oil flow rate becomes large temporarily, the valve body 16 tries to largely descend against the spring 18, but the stop plate 32 is seated on the peripheral edge of the central opening 19 and the valve body 16 is stopped. Is prevented from falling. In that case, the oil flows through the gap between the plate pieces 33 and 34.

As is clear from the above operation, the valve opening pressure of the valve bodies 16 and 17 of the valve device 30 is determined by the area of the central opening 19 and the total opening area of the inflow port 25. The pressure is set to a value smaller than the latter valve opening pressure. For example, when the valve opening pressure of the valve body 16 is set to 0.1 kg / cm ² and the valve opening pressure of the valve body 17 is set to 1.0 kg / cm ² , the opening area ratio between the central opening 19 and all the inlets 25 is 10 : 1

[0012]

【effect】

 As described above, the valve device of the present invention integrally includes the relief valve and the check valve, and when used in the filter element, does not increase the flow resistance more than necessary. Also, since two springs are not required, it is extremely easy to set the valve opening pressure. Further, it is possible to install the relief valve and the check valve very easily as compared with the case where the relief valve and the check valve are separately installed. Further, even if the oil pressure is temporarily increased, the flow of oil is not blocked and valve failure is prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a valve device of the present invention.

2 is a partial cross-sectional view of a filter element having the valve device of FIG.

FIG. 3 is a sectional view of a conventional filter element having a relief valve and a check valve.

FIG. 4 is a sectional view of an improved valve device.

[Explanation of symbols]

 15 Cylindrical body 16 Disc-shaped valve body 17 Disc-shaped donut-shaped valve body 18 Spring 21 Bottom plate 25 Inlet port 31 Connecting rod 32 Stop plate

Claims (1)

[Claims for utility model registration] 1. A disk-shaped valve body and a disk-shaped donut-shaped valve body are arranged via a spring in a cylindrical body having one end opened and a central opening provided at the other end. Then, at the other end of the tubular body, a bottom plate having a cylindrical portion in the central portion and an annular flat portion having an inflow port provided outside thereof is fixed, and the central opening is closed by a disc-shaped valve body, A valve device in which a connecting rod is connected to a disk-shaped central portion in which the inlet is closed by a disk-shaped donut-shaped valve body, and a stopper plate made of a plate piece is fixed to the tip thereof.