JPH07508U - Disposable oil filter - Google Patents

Abstract

(57) [Summary] [Object] To provide a disposable oil filter having a relief valve, in which a spring for holding a filter element in a case and a spring used for the relief valve are shared. [Constitution] Cylindrical part 1 in which a spring wire is wound in a cylindrical shape
6a and a spiral portion 16b which is spirally wound at the lower end of the cylindrical portion, a spring 16 is used to press and hold the filter element 2 at the cylindrical portion, and a valve body 15b of the relief valve at the spiral portion.
Was pressed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present application relates to a disposable oil filter used for a lubricating system of an internal combustion engine, for example.

[0002]

[Prior art]

 The disposable oil filter has a structure in which a filter element is arranged in a cylindrical case whose one end is open and the other end is closed, and the open end of the cylindrical case is covered with a thick plate having an inlet / outlet port. The filter element is pressed and held by a spring compressed between the element and the inner wall of the other end of the cylindrical case.

Such an oil filter is provided with a relief valve which bypasses the filter element without flowing it when the oil pressure rises to a predetermined value or more. This relief valve has a valve element integrally provided on the upper end of the filter element and pressed by a spring.

An oil filter of this type is disclosed in Japanese Utility Model Laid-Open No. 63-115411.

[0005]

[Problems to be solved by the device]

 The above conventional oil filter requires a spring for holding the filter element and a spring for the relief valve. The use of two springs in this way has the disadvantage that not only the number of parts is increased, but also the springs have to be individually arranged, which is troublesome to manufacture.

[0006]

[Means for Solving the Problems]

 In a disposable oil filter in which a filter element having upper and lower end plates is placed in a cylindrical case with one end open and the other end closed, and the open end is covered with a thick plate with an inflow / outflow port An annular protrusion is provided around the central opening of the plate, and the central opening is covered with a relief valve consisting of a central rivet and a disc-shaped valve body supported by the central rivet. The cylindrical part of the spring having the above is contracted between the projecting part and the closed end of the cylindrical case, and the spiral part is attached between the projecting part and the rivet in a stretched state.

[0007]

[Action]

 A part of the spring is contracted and the other part is attached in a stretched state, and has two functions. .

[0008]

【Example】

 FIG. 1 shows a disposable oil filter 10 according to an embodiment of the present invention, in which a filter element 2 is disposed in a cylindrical case 1 having one end opened and the other end closed. In the filter element 2, a filter paper body 4 folded in a chrysanthemum shape is arranged around a perforated cylinder 3, and upper and lower end plates 5 and 6 are fixed to the upper and lower ends thereof. The upper end plate 5 has an annular protrusion 8 around the central opening 7. Further, the lower end plate 6 has a central opening 9.

The open end of the cylindrical case 1 is covered with a thick plate 11. The thick plate 11 is provided with a slotted outlet 12 at the center, a plurality of inlets 13 provided around it, and the outer peripheral edge is further caulked with the open end of the cylindrical case 1. There is. A seal ring 14 is arranged between the lower end plate 6 and the thick plate 11 of the filter element 2. The central opening 7 of the upper end plate 5 of the filter element 2 is closed by a relief valve 15.

The relief valve 15 is composed of a disc-shaped valve body 15 b supported by a central rivet 15 a, and forms a valve between the outer peripheral portion 15 c of the valve body 15 and the protrusion 8 of the upper end plate 5. Let

A spring 16 is arranged between the filter element 2 and the closed end of the cylindrical case 1, and between the rivet 15 a of the relief valve 15 and the projection 8 of the upper end plate 5. As shown in FIG. 2, the spring 16 is a coil spring and includes a cylindrical portion 16a and a spiral portion 16b. The cylindrical portion 16a is formed by winding a spring wire in a cylindrical shape, and the spiral portion 16b is formed by spirally winding the same at the bottom of the cylindrical portion 16a.

In the spring 16, the cylindrical portion 16 a is compressed in a compressed state between the projecting portion 8 of the upper end plate 5 of the filter element 2 and the closed end of the cylindrical case 1, and the spiral portion 16 b includes the projecting portion. 8 and the rivet 15a are attached in a stretched state. As a matter of course, the portion of the rivet 15a where the end of the spiral portion 16b is held is located below the protrusion 8.

The oil flows in through the inflow port 13 of the thick plate 11, flows through the filter element 2, is filtered, passes through the inside of the perforated cylinder 3, and flows out through the outflow port 12. When the flow resistance increases to a predetermined value due to clogging of the filter element 2 or the like, the relief valve 15 opens and the oil is released to the clean side.

【effect】

 As described above, according to the present invention, the independent spring serves to hold the filter element and press the valve element of the relief valve, so that the number of parts is reduced and the structure is easy to manufacture. Becomes

[Brief description of drawings]

FIG. 1 is a sectional view of an oil filter of the present invention.

FIG. 2 is a sectional view of a spring used in the present invention.

[Explanation of symbols]

 5 Upper end plate 15 Relief plate 16 Spring 16a Cylindrical part 16b Swirl part

Claims (1)

[Scope of utility model registration request] 1. A disposable oil filter in which a filter element having upper and lower end plates is disposed in a cylindrical case having one end open and the other end closed, and the open end is covered with a thick plate having an inflow / outflow port. An annular protrusion is provided around the central opening of the upper end plate of the element and the central opening is
Covering with a relief valve consisting of a central rivet and a disc-shaped valve body supported thereby, a cylindrical portion of a spring having a cylindrical portion and a spiral portion at the bottom thereof is provided between the protrusion and the closed end of the cylindrical case. A disposable oil filter characterized in that the spirally-wound portion is installed between the protruding portion and the rivet in a stretched state by being contracted between them.